What are the causes of battery plate sulfation?

1 Answers
LeNathan
07/29/25 7:46am
Here are the causes of battery plate sulfation: 1. Due to the low electrolyte level, the exposed part of the plate comes into contact with air and oxidizes. The fluctuating liquid level causes the oxidized plate to alternate between wet and dry, leading to recrystallization and thus sulfation. 2. Frequent over-discharge or deep discharge with small currents causes lead sulfate to penetrate deep into the plate, which cannot be restored during charging, eventually leading to sulfation. 3. Impure electrolyte, high specific gravity, and drastic temperature changes are external factors that promote sulfation. Additional information: The formation of white coarse-grained lead sulfate on the battery plate is referred to as "lead sulfate hardening," commonly known as "sulfation."
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