Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-04-23 Hits: Popular:AG11 battery
Principle of thermal runaway chain reaction of LR44 battery
At the level of safety specifications for power lithium batteries, there is a lack of testing standards for the current control modules and systems to prevent thermal runaway thermal triggers, as well as life safety testing standards for cells, modules and system software, and there is an urgent need for scientific research and development. The key to my country's current standards is the hidden dangers of external components of rechargeable batteries, and there is no project to detect thermal runaway inside the battery.
Thermal runaway refers to the exothermic chain reaction of a single battery that causes the battery's self-temperature rise rate to change sharply and irreversibly, causing overheating, fire, and explosion.
Thermal runaway propagation refers to the thermal runaway phenomenon of the battery pack, or the single battery or battery module unit in the battery system, and triggers the thermal runaway of power lithium batteries in adjacent or other parts of the battery system.
Principle of thermal runaway chain reaction of LR44 battery:
(1) Causes of thermal runaway
The main causes of thermal runaway include: mechanical inducements, electrical inducements and thermal inducements.
Classic cases of fire accidents caused by mechanical equipment accidents include the scientific research results of the American General Motors Volt hybrid electric vehicle (volt), which has the highest sales volume in the world. And the world's most popular pure electric vehicle, the Motor Vehicle S, suffered fires throughout the process because the car's chassis was punctured by the road surface.
Take a typical example of a fire in a pure electric vehicle in my country, which illustrates the electric vehicle charging station caused by overcharging of the battery caused by the fire incident, and its Tesla model caused by the ultra-low temperature battery charging in winter. Fire safety incident.
A typical example is that a pure electric vehicle cannot be thermally controlled during operation. This is due to the release of a connecting component that causes high temperatures in the system software, resulting in thermal control and expansion of the battery pack.
The high-voltage system of pure electric vehicles can open up the heat in the bubbles and cause fires in pure electric vehicles. A classic case is that a pure electric vehicle in Nanjing was flooded after a period of time after a heavy rain.
In addition, pure electric vehicles in applications have life cycle safety issues. For example, if a pure electric vehicle is used for a period of time without any malicious events, the rechargeable battery components cannot The controlled heat caused a fire when the bus stopped at the station and ignited nearby buses, causing a lot of damage.
(2) Thermal runaway mechanism
After the entire evolution process, the safety accident of rechargeable batteries may enter the open stage. Generally speaking, after entering the open phase, the kinetic energy inside the lithium-ion battery may be released instantly, which is irreversible and uncontrollable, that is, heat cannot be controlled. Heat cannot control the intense temperatures generated by rechargeable batteries, and dangerous situations such as smoke, fire, and explosions can be observed at high temperatures.
Of course, according to the meaning of the theoretical safety factor, the rechargeable battery will not generate heat that cannot be controlled in a production safety accident. For example, rechargeable batteries do not necessarily generate uncontrollable heat after impact safety accidents; the insulation layer of lithium battery packs is ineffective, causing high-voltage accidents to workers; battery leakage current and odor cause physical discomfort to car workers, etc. Rechargeable batteries will not generate uncontrollable heat. heat. In the safety design of power lithium battery system software, the above conditions must be considered.
Thermal control is the most common safety factor incident and is a unique characteristic of lithium-ion battery safety factor incidents. Many tests have shown that rechargeable batteries that cannot be thermally controlled will not produce smoke, fire and explosions, nor will they explode.
In the case of smoke, in the case of ring v, if the temperature of the rechargeable battery is less than 660°C, the melting temperature of aluminum and platinum, the rechargeable battery is not easily ejected by reflected steam, and smoke is observed; if the temperature of the rechargeable battery is greater than 660°C, liquid aluminum The melt, rechargeable battery is accompanied by a large amount of reflected gas, which is the result of smoke emission.
In the event of a fire, generally due to the ignition of the lithium-ion battery electrolyte and dissolved substances, the heat cannot control the ignition in a safe accident. Therefore, starting from linkⅡ, the lithium battery electrolyte leaking out of the valve will be ignited and ignited.
According to the three elements of the combustion reaction (combustible, carbon dioxide, igniter), the flammable substance is the lithium battery electrolyte; the carbon dioxide problem in the rechargeable battery, so the lithium battery electrolyte will be exposed to fire; the igniter will come from the short circuit of the rechargeable battery Failures will also come from uncontrollable heat, high-speed injection of steam and valve body friction sparks.
In the case of an explosion, the general characteristic of an explosion is the effect of transient out-diffusion of high-pressure steam. The rechargeable battery has high accumulation standards inside, and the valve is an important means to immediately release the high-pressure steam accumulation. If the valve body can be opened before the battery shell cracks and releases enough high-pressure steam before the heat cannot control the entire process, the rechargeable battery will not easily explode; if the valve body cannot be opened immediately, an explosion event will occur.
Standard requirements for safety factor of power lithium batteries
Safety test specifications are the key to improving the safety factor of power lithium batteries. According to the arrangement of safety factors of power lithium batteries, the requirements for relative safety factors are clarified. At present, the safety test standards for power lithium batteries used in China include and.
The safety index values of single-pack and contact-pack power lithium batteries were evaluated, and a series of safety specifications and test standards were derived. gb/t31467 focuses on battery pack or charging system software level testing standards. Established gb/critical safety requirements and testing standards. Combined with gb/t31485-2015, the detailed mechanical energy safety protection standard consists of single battery, touch pack, power lithium battery pack and power lithium battery system software. At this stage, the overall testing standards for power lithium batteries are more stringent than abroad.
Read recommendations:
The battery maintenance of lithium battery manufacturers has the following points.lifepo4 battery fo
3.7v 2200mah 18650 lithium battery.Differences in 18650 lithium battery types
Popular recommendation
convenient energy storage power supply Factory
2023-05-1024v lifepo4 battery pack
2023-05-09battery energy storage system Manufacturing
2023-05-10702535 polymer battery
2023-03-22701221 polymer battery company
2023-03-22Lithium-ion battery GN200
2022-07-29Carpet game signs
2022-09-226F22
2022-07-04LR20
2022-07-01LR6
2022-08-19Wireless bluetooth headphones
2022-09-2218650 2500mAh 11.1V
2022-09-30Coin Battery LR 726
2022-10-15LR14
2022-08-19Ni-MH AA1200mAh 1.2Va
2022-07-01LR41 battery
2023-06-25602030 lipo battery
2023-06-25li ion 18650 battery pack
2023-06-25NiMH No. 7
2023-08-04LR521 battery
2023-06-25powerwall lifepo4 battery for solar system.New breakthrough in ternary lithium batteries - magazine
2023-11-22Lithium battery external circuit
2023-02-01Which raw materials are mainly used for lithium battery production
2022-11-10Lithium iron phosphate battery: already mature but not enough
2024-04-16Lithium battery specific energy and specific power
2024-04-13How to choose high -quality 18650 lithium batteries.portable energy storage battery power supply pri
2023-04-12AG2 battery.How to purchase 18650 lithium batteries
2023-10-11Main categories of batteries.18650 battery 3.7v 6000mah
2023-08-14Lithium battery application
2022-12-16Drone battery charger.lifepo11 battery for solar energy storage Manufacturing
2023-04-25