Two California Battery Companies Team Up to Build Highest Energy Density Lithium Battery in LA Area

Recently Torrance, CA based CALEB Technology and LA/Brea, CA based California Lithium Battery signed an MOU to establish a Joint Venture to produce a new line of safe ultra-high performance lithium ion batteries for consumer electronic devices, power tools, and electric vehicles (EVs).

As the global demand continues to grow for a safe, affordable, high energy density lithium-ion battery (LIB) two recognized Southern California advanced battery material companies, California Lithium Battery (CalBattery) and CALEB Technology (CALEB) have decided to combine their unique complimentary LIB materials into a new line of state-of-the-art LIBs initially to be made in the Los Angeles area starting in 2016.

Although over 90% of all LIBs are produced in Japan, China, and Korea, primarily due to their superior battery technology know-how, low labor cost and continued government support, the development of a new LIB “game-changer” breakthrough has proven to be illusive. For nearly 20 years, major LIB manufacturers and research institutions around the globe have been attempting to produce a high energy density, safe, affordable LIB with a long cycle life and rapid charging rates. The missing link till this point has been the right combination of new advanced LIB materials (i.e. cathodes, electrolytes, and anodes) in order to achieve a real LIB performance breakthrough. According to Phil Roberts, CEO of CalBattery, “Our new line of LIBs will incorporate the best blend of cathode, electrolyte, and anode materials to produce a superior product at a very competitive price per kilowatt hour. Today we might not be planning on building a gigawatt LIB factory but that may change overnight with one big order.”

The JV will combine the best LIB materials developed by both Calbattery and CALEB over the past 5 years. The first Calbattery/CALEB LIB will utilize novel high voltage lithium cobalt oxide cathode, high voltage dual phase electrolyte, and conventional anode materials that can be used for power tools, laptops, and cell phones. The second generation LIB will be designed for not only consumer electronic devices but for EV and energy storage applications and will incorporate the CalBattery (Argonne National Laboratory) novel silicon-graphene (SiGr) composite anode material that triples the anode specific capacity.

To compliment this new SiGr anode material, the JV will incorporate a unique dual phase polymer electrolyte material and process know-how developed by CALEB Technology that has shown to not only substantially increase LIB safety but improve energy density as well. “We are very happy to have signed an MOU and be partnering with CalBattery in this new JV and are confident with our combined superior battery materials and manufacturing knowhow that we can produce one of the world’s highest energy density LIBs right here in California,” stated CALEB Technology President, Thomas Lin.

The new line of superior LIBs that the CalBattery/CALEB JV plans to produce were developed over several years utilizing significant private, public, and academic resources. In the next 2-3 years the JV plans to develop and produce a 3rd generation lithium sulfur battery primarily for EV and energy storage applications. LIB industry battery analysts agree that high energy density performance and low costs LIBs are the key to wide scale EV and energy storage acceptance and utilization around the world.

About the Companies:

General Electronics Battery Co., Ltd. is a Sino-American joint-venture company, located in Shenzhen, Guangdong Province of P. R. CHINA. GEB is a professional manufacture of lithium-ion and lithium polymer batteries. In its office you would meet Sales Managers, Technical Engineers, Quality Managers and Production Supervisors. GEB provides to its customers with all kinds of battery products from small capacity to large ones for various applications such as consumer electronics, power bank, energy storage, medical devices, industrial instrument, heated cloths and electric vehicles. In comparison with other makers of lithium batteries, the advantages of GEB’s battery and power packs are higher energy density, lower internal impedance, better temperature characteristics and more reliable performance. GEB has a very strong R&D team with many years working experience in the field of lithium battery. This R&D team works on customized products, offers best power solutions to client’s projects. Our mission is to provide most suitable power solutions and 5-star service to our customer world wide for various applications from mobile phone to electric vehicles. In its production lines, GEB makes both lithium battery and battery packs with professional equipment and machines. In order to insure its product quality, GEB gives the training classes every week to its officers and operators from all different departments such as production, testing and inspection.

http://www.powbat.com.cn

http://www.gebattery.com.cn

Custom Build Gallery, Deecanios Astro mid drive

This mid drive build was started way back in 2008, but…it was so ahead of it’s time, it is still awesome by todays standards. Deecanio is the member-name of an endless-sphere.com builder from the UK who created this historic milestone E-bike.And we customed the batteries and ebike kits from GEB,a chinese batteries company.
He decided he wanted something completely new and cutting edge. He had read about how the components for Radio-Controlled (RC) aircraft models had grown large enough that they were beginning to be used on electric bikes. RC components can be found that are very powerful, but the reason for their high price is that they are very small, and it is having high power in a small package that he was willing to pay extra for.
Deec likes riding off-road, so he was immediately drawn to the idea of a mid drive system. The RC motor. controller, and reduction might be light, but it would be extra sweet if the modest weight of the drive could be centrally located, and also placed down low for a great balance.
2008 was about the same time that Matt (ES member “recumpense”) was doing a lot of development work to make highly professional mounts and also drive-reductions for Astro Flight motors. His designs are works of machinist art, and he is a pioneer in this field.
Here is a link to his monster yellow trike from 2013.

Laptop battery maintenance of several major errors

From the birth of the laptop the day, the debate about the battery has never stopped, because the use of persistence is a very important one laptops technical indicators, and battery capacity determines the important indicators of the notebook. In the end how to use in order to maximize the effectiveness of the battery to extend battery life of it? Below, we will list the errors we encountered several people very easy: (unexplained are now the most commonly used for lithium-ion batteries)

First, for the first time using the battery needs to be charged three times before 12 hours?

This is absolutely not necessary. Because now the laptop has improved power management circuitry and charging management system, when the battery reached saturation, the control circuit will automatically switch to the off state, so long as full on the line, not to say that the longer you charge the longer you can use the.

Second, in order to prevent the memory effect, should run out before charging it?

Each charge before the battery discharge is not necessary, and it is harmful. Because proved: the battery deep discharge will shorten battery life unnecessarily recommended when the battery is about 10% can be used to charge up. Of course, when the battery is still more than 30% of electricity is best not to charge, because the memory effect does exist.

Third, when you plug in the AC, the battery should be brought down to prevent the repeated charge and discharge it?

My advice to you is: Do not! Of course, you can take the natural discharge of lithium-ion batteries to refute me, saying that the natural discharge the battery, power supply access will occur if there are repeated charge and discharge conditions, reducing the battery life. And I give you “no” answer to the following reasons for this are several:

1 Now the notebook power control circuit are designed this feature: When the battery reaches 90% (such as HP’s most models) or 95% will be charged, but to achieve this through natural discharge capacity of a good time is 2 month, when the battery idle for about a month to fully charge and discharge the battery capacity to maintain, this time you should be concerned about is the battery should be recharged body workout instead of being idle after.

2 Even if the battery “unfortunate” to be recharged, the battery will not cause the loss caused by the decline over time without the battery much bigger.

3 Your data than your battery or your notebook are much more valuable, a sudden power failure not only hurt your laptop, you can not restore the data is too late to regret.

Fourth, the need for long-term preservation battery is fully charged it?

Read the following table became clear: (percentages are relative saturation at the time of initial value)

Storage temperature 40% to 100% state of charge state of charge

0 degrees 98% (one year later) 94% (a year later)

25 degrees 96% (one year later) 80% (a year later)

40 degrees 85% (one year later) 65% (a year later)

60 degrees 75% (one year later) 60% (3 months later)

Obviously, if you want long-term storage battery, try to put a dry cold environment and let the remaining battery power in about 40% of the best. Of course, the best month to come up with a battery, the battery can ensure a good state of preservation, and not let battery completely drain and damage the battery.

Fifth, when using a notebook on how to extend the possible use of time?

1. The screen brightness reduced. But power-hungry LCD screen brightness can be reduced effectively extend the use of time.

2 Open SpeedStep and PowerPlay power-saving features such as. Now the notebook processors and graphics chips have lower operating frequency and voltage to extend the use of time functions, open the appropriate option can greatly extend battery life.

3 Use the hard drive and optical drive spin-down software is: as NERO DriveSpeed, PowerBooster software can reduce the optical drive, hard disk drive speed, can effectively reduce the notebook’s power.

4 You can view the details of the laptop battery with related software.

General Electronics Battery Co., Ltd. electric vehicle battery has been committed to the development, production, for consumers to create a safe, environmentally friendly batteries.

http://www.powbat.com.cn

http://www.gebattery.com.cn

Electric car battery daily maintenance methods

Battery life is, battery repair just keep it reaches normal design life. To promote the product to any factor battery repair battery repair the damage with the new batteries, ensure that the battery life can be extended many times, these are not scientific, it is not realistic. Without any damage to the battery of any factors, have an impact on the battery life, the question is how to reduce the damage to the battery, how to reduce the impact on battery life, following a brief introduction of several electric vehicle battery daily maintenance method for your reference.

Lead-acid batteries have no memory, so the capacity to rapidly decrease was primarily sulfide batteries and “dehydration”, “loss of power” and for some reason, fear is the battery “power loss” Brown, batteries often “power loss” battery pole board easily injured, we found that up to 70 percent of the electric vehicle battery capacity to reduce high current (starting current) strain discharge electrode plate is caused (electrical 摩尤 its obvious), strain belonging to the battery electrode plates physical damage, this damage can not be repaired. Therefore, “every car, every charge” to ensure that there is always sufficient battery voltage has become inevitable.

Users generally thought, maintenance-free batteries do not add water, in fact, this statement is wrong. Maintenance-free battery charging and high-current discharge process generates heat, there will be a heat evaporation, although the process is very slow evaporation of water, but over time, the cumulative amount of water evaporation on can not be overlooked.

Electric car start clever force. Electric car start-up current is large, especially in high-power electric motor friction, higher starting current. It hurt a large current battery plates, the best way is like riding a bicycle after riding before you start, and then start the electric car power supply. Of course, many electric motor means no riding, which is no other way.

Quarterly on the battery deep discharge once. After the battery is bound to use for some time to sink some active substances, if not promptly activate the active substance is bound to cause some impact on the battery capacity, so often used in electric car, the battery should be done on a quarterly basis depth of discharge once.

Frequently observed charger is good or bad. New battery charging process is generally 6-8 hours, the charger will light green when fully charged, the charging time is too long if necessary to check whether the charger voltage protection device corrupted, corrupted if you need immediate replacement charger or vulnerable to charge a bad battery. Also, do not buy fast charger charger for fast charging battery plates have the same injury.

Long battery when not in use for at least a month to give the battery charging time. The aim is to prevent the battery from the battery caused by placing too long curing and “loss of electricity.”

Prevent the battery from prolonged sun exposure. Prolonged sun exposure can cause the battery temperature rises, so pay attention.

The above part of a more comprehensive description of the battery damage, repair, and maintenance of the relevant skills and knowledge, which is based on our years of experience and market feedback information written in simple language articles, layman understand at a glance. At the same time, we also sincerely reader from one side of the electric car battery repair techniques uncover the mystery, which is battery repair can take many methods, but not all damage to the battery are effective, curing illnesses and small battery restored effective; plate mild softening, short circuit, may be effective after a short break after every repair, as supernatural, as will the use of time is not long fallen into place; also some very serious damage to the battery, repair largely ineffective, introduction this knowledge is mainly to facilitate the reader’s understanding of the industry initially make the right choice on battery maintenance and repair.

After passing electric car batteries by battery manufacturers factory, battery life and performance depends in part on consumer use and maintenance.

(1) Matching charger and battery.

Electric car batteries are rechargeable bad, rather than bad, showing the importance of the charger and the battery match, there are two situations: First, the new parameters and battery charger provided by the manufacturer itself does not match, the charging voltage is too high and aggravated battery water loss, shortened life expectancy, more serious is the charge current drops to less than the current value of the conversion settings, battery temperature, charging current is further increased, the temperature rise much, resulting in thermal runaway cell expansion and deformation, and vice versa charging voltage is too low, the battery charge state owe a long period, not always part of PbSO4 conversion, resulting in sulfate, battery capacity drops, electric bikes continues the course shortened. Second, poor quality components charger itself, just started, fairly matched, as consumers charge and discharge cycles used. Charger itself due temperature, aging of components, resulting in the charging voltage and switching current drift, battery damage.

It is recommended that consumers and manufacturers of electric vehicles is best to buy a battery charger manufacturers supporting, not because it is cheap and filling joie de vivre of a bad battery, but not worth the candle.

(2) Often, replenish electricity.

Consumers using the nominal cycle life instructions usually have a misconception that one charge, the battery life is reduced once, so every time the battery power consumption, such as the protection voltage 31.5V to the controller began to supplement electricity , not knowing that not only can not protect the battery and shorten battery life. Because the positive active material is not strong PbO2 itself combined with each other, and the molar volume of PbO2 and PbSO4 are very different, more shallow depth of discharge, contraction, the lower the degree of expansion.

So remind consumers, where possible, the battery should charge it in time.

(3) Prohibited under undervoltage condition indicator shows continue riding. Some consumers after riding half way, the indicator displays the status of undervoltage take rest a re-ride some way, such great harm to the battery, the battery will discharge over serious salinization or lead generation branches crystal, short circuit the battery, affect life expectancy.

(4) electric bikes just starting, climbing, overloading should try to help.

(5) rain riding, switches and connectors should try to avoid getting wet, to prevent leakage.

Know more about some aspects of the knowledge about the battery lead-acid batteries for electric bikes maintenance and repair have positive side, through technical improvements compared with the great advantage especially to improve the colloidal technology, cost-effective lead-acid batteries and other batteries.

General Electronics Battery Co., Ltd. electric vehicle battery has been committed to the development, production, for consumers to create a safe, environmentally friendly batteries.

http://www.powbat.com.cn

http://www.gebattery.com.cn

What is 18650 battery?

18650 is a very common lithium batteries, which are widely used in many of our rustling related items, such as mobile phones, we often use laptop battery power and it is the combination of the 18650 batteries made​​. Understand its application, here we come to understand one of its constituent

Lithium-ion battery (Li-ion, Lithium Ion Battery): Lithium-ion battery is light weight, high capacity, no memory effect, etc., which have been widely used - in many digital devices now have adopted the lithium-ion batteries for power, Although its price is relatively expensive. High energy density lithium-ion battery, its capacity is 1.5 to 2 times the same weight of nickel-metal hydride batteries, and has very low self-discharge rate. In addition, the lithium-ion battery is almost no “memory effect” and does not contain toxic substances, etc. It is also widely used in important reasons.

Lithium is a metallic element, chemical formula Li, is an active metal, lithium why we want his name it? Because it is based on a positive level, “Put lithium” as cathode materials for batteries, this battery charging and discharging process mainly around the pros and cons of metal Li electronic processes undertaken.

Also note that lithium batteries outside the general standard English 7.2V lithiumion battery (lithium battery) or 7.2V lithium secondary battery (lithium secondary battery), 7.2V lithiumion rechargeable battery (rechargeable lithium battery), so the user must when buying a battery see the battery block exterior signs, to prevent because there is no will to see the type of nickel-cadmium batteries, nickel hydrogen batteries mistaken for lithium batteries.

18650 is one model of a lithium-ion battery, the battery is a cylindrical steel, 18 denotes the diameter of 18mm, 65 representative of the height of 65mm (height)

Capacity-type lithium battery capacity of 18,650 can now be done 2500mAh, magnification type of battery can be charged and discharged 2C normal use. Therefore, the power can be very large. Further, the material characteristics of the lithium ion battery when it is determined nominal voltage 3.7V, the voltage range is between 2.9—4.2V can charge and discharge. Cathode material is lithium-ion compounds, high energy density, with the continuous development of metal active metal compound materials, energy density continues to increase, coupled with the optimization of the battery manufacturing process, the use of fully automated production equipment, as well as to enhance the capacity of the space.

Lithium battery protection circuit design

Composition and performance of lithium battery materials

Sino Universal Battery Co., Ltd. has been committed to the development of lithium battery production. For the safety of lithium batteries is designed with its own model, following on to briefly discuss lithium battery protection circuit program, we first look at composition, lithium-ion battery performance depends on the structure of the material lithium battery inside the material used and the performance. These materials include a negative electrode material within the battery, an electrolyte, a separator and a positive electrode material. Where the positive anode material selection and quality directly determines the performance of lithium-ion batteries and price. So cheap, high-performance positive and negative materials research has been focused on the development of lithium-ion battery industry.

Anode material is generally used in the carbon material, the current development is more mature. And the development of cathode materials has become an important factor restricting further improve the performance of lithium-ion batteries, further price reduction. In the current commercial production of lithium-ion batteries, the cathode material cost accounts for about 40% of the cost of the battery, reducing the price of cathode materials directly determines the reduced price of lithium-ion batteries. For lithium-ion batteries in particular. For example, a mobile phone with a small lithium-ion battery cathode material requires only about five grams or so, while driving a bus with a lithium-ion battery cathode materials may require up to 500 kg.

Although theoretically can be used as a lithium-ion battery cathode material of many species, common cathode material mainly composed of LiCoO2, charging, added to the battery terminals of the positive potential of the compound to force the release of lithium ions, embedded negative elements arranged in lamellar structure of carbon. Discharge, lithium ions from the lamellar structure of carbon precipitation, and a compound re-cathode combination. Movement of lithium ions generated current. This is the working principle of the lithium battery.

Lithium battery charge and discharge management design

When the lithium battery charging, plus the battery cathode polarization potential compounds to force the release of lithium ions, embedded negative carbon molecules arranged in lamellar structure. Discharge, lithium ions from the lamellar structure of carbon precipitation, and a compound re-cathode combination. Movement of lithium ions generated current. Although the principle is simple, but in the actual industrial production, the actual problem to be considered much more: a positive electrode material of additives required to maintain the activity of repeated charge-discharge, the negative electrode material needs to design the molecular structure to accommodate more level number of lithium ions; filling the electrolyte between the positive and negative electrodes, in addition to maintaining stability, but also need to have good electrical conductivity, the internal resistance of the battery is reduced.

Although lithium-ion batteries have all the advantages mentioned above, but it requires the protection circuit is relatively high, in the course should strictly avoid overcharge, over-discharge phenomenon, the discharge current is not too large, in general, the discharge rate should not exceed 0.2C. Lithium battery charging process is shown in Fig. In a charge cycle, the lithium-ion battery before charging starts to be detected battery voltage and temperature, to determine whether rechargeable. If the battery voltage or temperature exceeds the range allowed by the manufacturer is prohibited charging. Allow the charging voltage range is: each cell 2.5V ~ 4.2V.

In the case of the battery is deeply discharged, must require charger has a pre-charge process, the battery condition to meet the fast charge; then, according to the manufacturer’s recommended battery fast charging speed, usually 1C, constant current charging the battery charger, the battery voltage to rise slowly; Once the battery voltage reaches the end voltage is set (usually 4.1V or 4.2V), the termination of the constant current charging, the charging current decreases quickly charged into the process of full charge; in the process of full charge, the charge current gradually decay until the charging rate is reduced to C / 10 following a timeout or when full charge time, into the top off charge; tip off when charging, the charger with a minimum charge current to the battery to replenish their energy. Top off the charging period of time, turn off the charge.

Lithium battery protection circuit design

Due to the chemical properties of lithium-ion batteries, in normal use, its internal chemical energy into electrical energy and chemical reactions at each other, but under certain conditions, such as its overcharge, over-discharge and over-current will cause the battery Vice internal chemical reactions, after aggravate the side effects, it will seriously affect battery performance and service life, and may produce large amounts of gas, the battery internal pressure increases rapidly after the explosion caused by security problems, so all of the lithium-ion batteries are needed a protection circuit for battery charge and discharge status effective monitoring and shutdown charge under certain conditions, the discharge circuit to prevent damage to the battery.

Lithium-ion battery protection circuit includes overcharge protection, over current / short circuit protection and over-discharge protection, overcharge protection requires high precision, protect low IC power consumption, high-voltage and zero-volt rechargeable other characteristics. The following article will detail these three principles of the protection circuit, the new features and functionality requirements of engineers to design and develop a protection circuit with a reference value.

Lithium battery protection circuit design case Share

Lithium battery for power supply circuit design, requires increasingly complex mixed-signal system integrated into a small area of ​​the chip, which is bound to the digital, analog circuit proposed low-voltage, low-power consumption. In the restricted power and function, how to get the best design but also the current power management technology (PowerManagement, PM) is a research hotspot. On the other hand, the application of lithium batteries also greatly promoted the design and development of appropriate battery management, battery protection circuit. Lithium battery must have the application of complex control circuits to prevent overcharge, over-discharge and over-current condition.

Energy transition from electric bike trend discusses the use of ultra-low-power, high-performance lithium battery electric bicycle design MSP430F20X3 charge and discharge protection circuit program. The program from the system architecture, charge and discharge circuit, the whole process of detection and protection circuit design discussed every detail designed for electric bicycle power designers with a more comprehensive reference.

More lithium professional information, visit: 

http://www.gebattery.com.cn

What is a high-rate battery?

We have been saying the high rate battery, that in the end what is it high magnification, the battery discharge rate refers to the current value of its rated capacity when the battery is discharged within a specified period of time required, the data value is equal to a multiple of the rated capacity of the battery, usually expressed with the letter C. If the battery’s nominal rated capacity of 600mAh to 1C (1 magnification), 300mAh was 0.5C, 6A (600mAh) for 10C. And so on.

Our cells are said high-rate refers to the battery can discharge a large current, such as the battery capacity is C = 1AH 1A to 1C is the discharge current of the discharge! 5C discharge current is 5A put! Large current discharge rate battery can with his design of the plate! Can still be able to release the battery capacity in high-current discharge under a large part! And ordinary batteries in large current discharge, emit only a fraction of the energy!

Example 1: 16850 Battery capacity: 2000 mAh (2 Ah)

10C high-rate discharge the 18650 batteries mean maximum operating current can instantly reach 20,000 mA (20 amp) discharge,

1C = nominal capacity of 2000 mAh / h = 2000 milliamperes (mA) = 2 Ann (A)

10C = 20000 毫安 (mA) = 20 Ann (A)

Then the battery concerned with what it magnification, the magnification of the battery to the battery-related materials and processes, the rate characteristic of the battery charge and discharge performance of the battery means, the higher the ratio of discharge current to withstand the greater the magnification unit C, the general said a few C charge and discharge. L is lithium iron phosphate (as voltage 2.3V) basic level of around 40C can be achieved, should be emphasized that due to its characteristics of lithium iron phosphate, and some 20 ~ 30C battery can discharge current, and 5 ~ 10C can not be discharged, should considered a bad performance ratio.

So how should we choose high-rate battery manufacturers do, the current domestic rate continuous discharge of lithium cobalt oxide (as voltage 3.0V) can achieve the basic level of around 75C, there are claims of individual manufacturers can achieve 80 ~ 90C continuous discharge, has not been confirmed, equipment requirements for the discharge of its relatively high. There is no best, not the same type is not the same magnification, power type specific capacity type is good, various manufacturers have advantages and disadvantages, to buy well-known manufacturers like. Shenzhen Sino Universal Battery has been committed battery research and development, production, sale, in the field of high-rate battery has its unique advantages.

Tesla fire bring disaster to their share price volatility

I believe we have a concern about the developments in the Tesla electric car, it’s every action will cause strong reactions in the industry, unfortunately Tesla battery recently had a problem that people are most concerned about: safety, this month in American, a Tesla Model S electric vehicle battery module hit by fire. In Tesla this year became the focus of the automotive industry background, the case caused an uproar, Tesla shares soared this year, and therefore volatility. 

Local time on October 1, a Tesla Model S at the Washington State Kent (Kent) of road metal objects on fire after the collision. Then fire scenes photos and video widely disseminated on the Internet, causing concern and hot, and for questioning the safety of electric vehicles.

Tesla shares this year, an increase of about five times, thus “Tesla Tornado” famous. And this after the fire incident sharp fluctuations in stock prices, only 2 October afternoon in less than an hour, the stock price plummeted from $ 185.74 to $ 175.76. Landslide to 23, the stock was more than 10%, the stock had reached its lowest point around $ 168, which means a $ 2.3 billion market value evaporated.

In order to “fire”, October 4 Tesla CEO Aron • Musk (Elon Musk) on the blog published an open letter by the principles of interpretation of the safety performance of the Tesla Model S defense.

Musk noted, Model S at the time and chunks of metal objects collided with a large area of ​​the body damage. Later on the road near the scene and found a possible fall from the truck bent metal panels, which may be the culprit. In relative motion, the panel drill into the vehicle, piercing the Model S Body leveraged to form a hole diameter of 3 inches, while the body of the car to protect the car only a quarter-inch shell thickness, can not stop up to 25 tons penetration force. In crashing, the lithium battery fire. 

But Musk stressed that due to the early warning system to help car, Model S owners succeeded in escaping from the trouble spot. Front-end collision resulting in the battery module fires, Model S battery pack includes a total of the entire 16 modules, most mounted on the front of the car, separated from the interior of each module by fire apparatus. Ventilation holes on the battery pack makes the flame spray down along the road and away from the car. It also believes that compared with traditional fuel vehicles, electric vehicles are relatively low flammability, if a combustible fuel by the impact, the consequences will be more serious.

After publication Musk defended Tesla stock was back up to $ 180 level, to October 7 and even return to the $ 186 level. But October 8 Tesla shares plummeting to near $ 175 again, the day to close at $ 174.73, $ 194.50 from the highest point of this year’s significant gaps.

       Security issues can not be ignored in today’s focus on new energy development, power type lithium trends generally optimistic, but security problems have been an issue of great concern to everyone, I hope the first company can focus on this issue.

General Electronics Battery Co., Ltd. electric vehicle battery has been committed to the development, production, for consumers to create a safe, environmentally friendly batteries.

http://www.gebattery.com.cn

Note lithium battery of series and parallel

The power lithium battery in series and in parallel use, which sounds like a very simple, but to follow a few simple rules, you can avoid unnecessary problems. Lithium battery pack contains two parts: the lithium battery and lithium battery protection circuit.

   In the lithium group is more than a lithium battery in series, to get the required operating voltage. If you need a higher capacity and higher current, it should put lithium batteries in parallel. There are also a number of battery packs in series and in parallel with the combination of these two methods. A laptop battery may be the four 3.6V lithium-ion batteries in series, the total voltage reaches 14.4V; then, then strung together two batteries in parallel, so that the total power consumption of the battery pack can be from 2000 up to 4000 mA when mA. This connection is called “two-and four-string,” which means: put in parallel two by four batteries in series with the battery pack. Lithium-ion battery nominal voltage is 3.6V. Lithium ion polymer batteries, and other types of lithium, its rated voltage is typically 3.7V. If you want to get like this are not common 11.1V voltage, you have to put three such batteries connected in series. Series portable devices that require high power, usually by two or more batteries in series battery pack. Another problem with the use of high-voltage battery pack brings is likely to encounter situations where a section of the battery pack battery failure. It’s like a chain, the more series with the battery, there is higher probability of this situation. As long as a battery problem, its voltage is reduced. In the end, an “off” the battery may interrupt current delivery. And to replace the “bad” batteries is no easy task, because the new and old batteries are not mutually matched. In general, the capacity of a new battery is much higher than the old cell. With the decline of the operating voltage, it reaches the discharge end of the critical point faster than a normal battery pack, while its time dramatically shortened. Once the device is cut off due to the power supply voltage is too low, the rest of the cells remained intact as the battery is not able to send out the stored charge. At this time, the bad battery cell that also presents a great resistance, but also with the load at this time, if, then, will cause the entire chain of the battery output voltage will fall significantly. In one set of batteries in series, one section of the poor performance of the battery, like a blocked pipe plug, will have a huge resistance to prevent current flow in the past. Other batteries will short-circuit, which will reduce the terminal voltage to 3.6V, or disconnect the battery pack and cut off the current link. Performance of a battery depends on the battery group is the worst performance of the battery piece.

   In parallel in order to get more power, you can put two or more cells connected in parallel. In addition to the battery in parallel, another approach is to use larger size battery. Due to limited battery can be chosen, this approach does not apply to all situations. In addition, the large size of the battery is not suitable to make special batteries required form factor. Most of the chemical batteries can be used in parallel, while the lithium-ion battery most suitable parallel. Connected in parallel by four battery cells, the voltage is held 3.6V, and the current and the operating time is increased to four times. Compared with the cells in series, the parallel circuit in the battery, a high impedance or “open” Impact of the battery is small, however, will reduce the load in parallel to the battery capacity and shortening the operation time. This is like a three-cylinder engine is only started. Damage caused by a short circuit will be even greater, because, in the short circuit, faulty battery will quickly run out of other batteries in the battery and cause a fire.

When using such a series-parallel connection method, the design is very flexible, you can use a standard battery size to the rated voltage and current needs. It should be noted: the total power of the battery will not be because of the different connection method is changed. Power is equal to the voltage multiplied by current. For lithium-ion batteries, the series-parallel connection method is very common. The most common kind of battery pack is a 18650 (diameter 18mm, length 650mm), which is protected with the protection circuit board lithium battery, lithium battery protection board can monitor each cell connected together in series, so that its maximum The actual voltage is 14.4V. The lithium battery protection circuit (ie, lithium protection board) can also be used to monitor series with each section of the battery. When the number of cells in series, you must comply with the following basic requirements: to keep clean the battery connection point. When to use four batteries in series, a total of eight connection points (the battery to the connection point of the battery compartment, the battery compartment to the connection point of the next section of the battery). Each connection point is there is a certain resistance, if you increase the connection point, which may affect the performance of the entire battery pack. Do not mix battery, select the consistent performance of the battery. When the battery is low, replace all the batteries. When used in tandem, to use the same type of battery. Pay attention to the battery polarity. If there is a polarity of the battery installed backwards, it will reduce the whole string of battery voltage, rather than increasing voltage.

General Electronics Battery Co., Ltd. electric vehicle battery has been committed to the development, production, for consumers to create a safe, environmentally friendly batteries.

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Electric car battery daily maintenance methods

Battery life is, battery repair just keep it reaches normal design life. To promote the product to any factor battery repair battery repair the damage with the new batteries, ensure that the battery life can be extended many times, these are not scientific, it is not realistic. Without any damage to the battery of any factors, have an impact on the battery life, the question is how to reduce the damage to the battery, how to reduce the impact on battery life, following a brief introduction of several electric vehicle battery daily maintenance method for your reference.

Lead-acid batteries have no memory, so the capacity to rapidly decrease was primarily sulfide batteries and “dehydration”, “loss of power” and for some reason, fear is the battery “power loss” Brown, batteries often “power loss” battery pole board easily injured, we found that up to 70 percent of the electric vehicle battery capacity to reduce high current (starting current) strain discharge electrode plate is caused (electrical 摩尤 its obvious), strain belonging to the battery electrode plates physical damage, this damage can not be repaired. Therefore, “every car, every charge” to ensure that there is always sufficient battery voltage has become inevitable.

Users generally thought, maintenance-free batteries do not add water, in fact, this statement is wrong. Maintenance-free battery charging and high-current discharge process generates heat, there will be a heat evaporation, although the process is very slow evaporation of water, but over time, the cumulative amount of water evaporation on can not be overlooked.

Electric car start clever force. Electric car start-up current is large, especially in high-power electric motor friction, higher starting current. It hurt a large current battery plates, the best way is like riding a bicycle after riding before you start, and then start the electric car power supply. Of course, many electric motor means no riding, which is no other way.

Quarterly on the battery deep discharge once. After the battery is bound to use for some time to sink some active substances, if not promptly activate the active substance is bound to cause some impact on the battery capacity, so often used in electric car, the battery should be done on a quarterly basis depth of discharge once.

Frequently observed charger is good or bad. New battery charging process is generally 6-8 hours, the charger will light green when fully charged, the charging time is too long if necessary to check whether the charger voltage protection device corrupted, corrupted if you need immediate replacement charger or vulnerable to charge a bad battery. Also, do not buy fast charger charger for fast charging battery plates have the same injury.

Long battery when not in use for at least a month to give the battery charging time. The aim is to prevent the battery from the battery caused by placing too long curing and “loss of electricity.”

Prevent the battery from prolonged sun exposure. Prolonged sun exposure can cause the battery temperature rises, so pay attention.

The above part of a more comprehensive description of the battery damage, repair, and maintenance of the relevant skills and knowledge, which is based on our years of experience and market feedback information written in simple language articles, layman understand at a glance. At the same time, we also sincerely reader from one side of the electric car battery repair techniques uncover the mystery, which is battery repair can take many methods, but not all damage to the battery are effective, curing illnesses and small battery restored effective; plate mild softening, short circuit, may be effective after a short break after every repair, as supernatural, as will the use of time is not long fallen into place; also some very serious damage to the battery, repair largely ineffective, introduction this knowledge is mainly to facilitate the reader’s understanding of the industry initially make the right choice on battery maintenance and repair.

After passing electric car batteries by battery manufacturers factory, battery life and performance depends in part on consumer use and maintenance.

(1) Matching charger and battery.

Electric car batteries are rechargeable bad, rather than bad, showing the importance of the charger and the battery match, there are two situations: First, the new parameters and battery charger provided by the manufacturer itself does not match, the charging voltage is too high and aggravated battery water loss, shortened life expectancy, more serious is the charge current drops to less than the current value of the conversion settings, battery temperature, charging current is further increased, the temperature rise much, resulting in thermal runaway cell expansion and deformation, and vice versa charging voltage is too low, the battery charge state owe a long period, not always part of PbSO4 conversion, resulting in sulfate, battery capacity drops, electric bikes continues the course shortened. Second, poor quality components charger itself, just started, fairly matched, as consumers charge and discharge cycles used. Charger itself due temperature, aging of components, resulting in the charging voltage and switching current drift, battery damage.

It is recommended that consumers and manufacturers of electric vehicles is best to buy a battery charger manufacturers supporting, not because it is cheap and filling joie de vivre of a bad battery, but not worth the candle.

(2) Often, replenish electricity.

Consumers using the nominal cycle life instructions usually have a misconception that one charge, the battery life is reduced once, so every time the battery power consumption, such as the protection voltage 31.5V to the controller began to supplement electricity , not knowing that not only can not protect the battery and shorten battery life. Because the positive active material is not strong PbO2 itself combined with each other, and the molar volume of PbO2 and PbSO4 are very different, more shallow depth of discharge, contraction, the lower the degree of expansion.

So remind consumers, where possible, the battery should charge it in time.

(3) Prohibited under undervoltage condition indicator shows continue riding. Some consumers after riding half way, the indicator displays the status of undervoltage take rest a re-ride some way, such great harm to the battery, the battery will discharge over serious salinization or lead generation branches crystal, short circuit the battery, affect life expectancy.

(4) electric bikes just starting, climbing, overloading should try to help.

(5) rain riding, switches and connectors should try to avoid getting wet, to prevent leakage.

Know more about some aspects of the knowledge about the battery lead-acid batteries for electric bikes maintenance and repair have positive side, through technical improvements compared with the great advantage especially to improve the colloidal technology, cost-effective lead-acid batteries and other batteries.

General Electronics Battery Co., Ltd. electric vehicle battery has been committed to the development, production, for consumers to create a safe, environmentally friendly batteries.

http://www.gebattery.com.cn