Li-ion 7.4V 1800mAh Replacement Batteries for Vertex VX-459
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1. What is the sealing principle of cadmium nickel and hydrogen nickel sealed batteries?
Answer: The principle of sealing is the principle of oxygen circulation. That is, sponge cadmium and hydrogen storage alloy can easily be combined with oxygen under alkaline conditions to eliminate oxygen.
2. In a low-pressure hydrogen-nickel sealed battery, why is the effective capacity of the negative electrode greater than the effective capacity of the positive electrode?
A: Because of the battery seal, it is necessary to eliminate the gas generated during charging and storage. The oxygen circulation method can eliminate oxygen. When charging, when the effective capacity of the positive electrode is lower than the effective capacity of the negative electrode, the positive electrode reaches the fully charged state before the negative electrode, and the charging continues, and the oxygen evolved from the positive electrode diffuses to the negative electrode and reacts with the negative electrode active material metal hydride to be absorbed, and the negative electrode is always It is in an incomplete state of charge, so that the negative electrode does not generate hydrogen gas, thereby eliminating the gas generated during the charging process and achieving battery sealing. Of course, there is still hydrogen inside the battery, but it is less in normal conditions.
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