18650 rechargeable battery lithium 3.7v 3500mah
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polymer lithium battery Primary battery Rechargeable Battery LR03 alkaline battery
18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah
polymer lithium battery

Primary battery

Rechargeable Battery

LR03 alkaline battery

CR2032 battery.Lithium battery safety design

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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