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Why is the car battery overheating?

1 Answers

McErin

07/30/25 3:06am

Reasons for battery overheating during discharge: Discharging too quickly, possibly due to a small battery capacity where the discharge current exceeds 0.5C for an extended period. It could be battery thermal runaway. Long-term charging of batteries with high float charge voltage can lead to severe capacity degradation, resulting in thermal runaway. Consequently, gas inside the battery casing may leak, causing the battery to fail completely without any capacity. Another possibility is battery thermal runaway. Long-term charging of batteries with high float charge voltage can cause significant capacity reduction, leading to thermal runaway, which results in gas leakage from the battery casing and complete failure of the battery with no capacity. There is also a chance that your charger is faulty, or the charger and lead-acid battery pack are mismatched, causing battery thermal runaway. If the charger voltage is too high, exceeding the regulation value of the lead-acid battery pack, it significantly increases gas evolution in the battery, leading to thermal runaway.

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