What to do if the battery cabinet current exceeds the limit

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What to do if the battery cabinet current exceeds the limit

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FAQS 4

What should I do if my battery overheats?

Be on alert for other battery anomalies, such as ground faults and shorted cells, which can negatively impact charging voltages and ultimately lead to thermal runaway. If you notice a battery overheating, disconnect it from charge and inspect it for other damage. Separate it from other systems to avoid thermal runaway.

What causes a battery to runaway?

Thermal runaway begins when the heat generated within a battery exceeds the amount of heat that is dissipated to its surroundings. If the cause of excessive heat creation is not remedied, the condition will worsen. Internal battery temperature will continue to rise – causing battery current to rise – creating a domino effect.

What happens if a lithium ion cell is pushed beyond C-rate limits?

Lithium-ion cells pushed beyond C-rate limits undergo metallic lithium plating on anodes during charging, reducing capacity and causing internal shorts. Exothermic reactions from electrolyte decomposition generate gas, leading to swelling. Thermal runaway propagates between cells at 150-250°C, releasing flammable electrolytes.

Can a battery pack be protected if a vehicle controller knows power limits?

These voltage limits will have to be applied anyway, but they tend to be a hard stop. If the vehicle controller knows the current/power limits ahead of time then the battery pack can be protected and the user can be limited more gradually to avoid the sudden loss of power.

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