What's The Harm in Overcharging And Undercharging?

Overcharging means that the charging current of the battery is greater than the acceptable current of the battery, and the excess is the amount of overcharge. Overcharging is mainly a side reaction of electrolyzed water. Since the oxygen generated by the positive electrode of the battery is transferred to the negative electrode for oxygen recombination reaction, heat will be generated, so The actual conversion of overcharge into heat increases the temperature of the battery. If it is not controlled, it will cause a large amount of water loss, and in severe cases, it will cause a "thermal runaway" capacity reduction, or even deformation and other failures. Generally speaking, undercharging means that under the condition of insufficient charging, it will gradually form a kind of coarse and hard lead sulfate, which is almost insoluble, resulting in the so-called "irreversible sulfation". Charge into the battery, so the capacity decays quickly over and over again.