Views: 0 Author: Site Editor Publish Time: 2023-08-10 Origin: Site
Overcharging refers to the behavior of a battery being fully charged after a certain charging process, and then continuing to charge. For Ni-MH batteries, overcharging produces the following negative effects
Should:
Positive electrode: 4OH -4e → 2H2O+O2 ↑; ①
Negative electrode: 2H2+O2 → 2H2O ②
Due to the higher capacity of the negative electrode compared to the positive electrode during design, the oxygen generated by the positive electrode is compounded with the hydrogen generated by the negative electrode through the diaphragm paper
Under normal circumstances, the internal pressure of the battery will not increase significantly, but if the charging current is too high or the charging time is too long, the oxygen generated will not be sufficient
If consumed, it may cause an increase in internal pressure, deformation of the battery, leakage, and other adverse phenomena. At the same time, its electrical performance will also significantly decrease.
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