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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:2024-04-22 Hits: Popular:AG11 battery
Lithium battery safety design
In order to avoid overdischarge or overcharge of the battery due to improper use, a triple protection mechanism is provided in the single lithium-ion battery. The first is the use of switching components, when the temperature in the battery rises, its resistance value will rise, when the temperature is too high, it will automatically stop the power supply; The second is to select the appropriate partition material, when the temperature rises to a certain value, the micron-level micropores on the partition will automatically dissolve, so that lithium ions cannot pass through, and the internal reaction of the battery will stop; The third is to set the safety valve (that is, the vent hole on the top of the battery), when the internal pressure of the battery rises to a certain value, the safety valve automatically opens to ensure the safety of the battery.
Sometimes, although the battery itself has safety control measures, but because of some reasons caused by control failure, lack of safety valve or gas too late to release through the safety valve, the battery internal pressure will rise sharply and cause an explosion.
Under normal circumstances, the total energy stored by lithium-ion batteries and its safety is inversely proportional, with the increase of battery capacity, battery volume is also increasing, its thermal performance deteriorates, the possibility of accidents will increase significantly. For lithium-ion batteries for mobile phones, the basic requirement is that the probability of a safety accident is less than one in a million, which is also the minimum standard acceptable to the public. For large-capacity lithium-ion batteries, especially large-capacity lithium-ion batteries such as automobiles, the use of forced heat dissipation is particularly important.
The choice of a safer electrode material, the choice of lithium manganate material, in terms of molecular structure to ensure that in a fully charged state, the positive lithium ions have been completely embedded in the negative carbon hole, fundamentally avoiding the generation of dendrites. At the same time, the stable structure of lithium manganese oxide makes its oxidation performance far lower than lithium cobalt oxide, and the decomposition temperature exceeds 100℃. Even if the internal short circuit (needle), external short circuit, and overcharge occur due to external force, it can completely avoid the danger of combustion and explosion caused by precipitation of lithium metal.
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