Nickel-Metal hydride batteries are composed of a positive electrode made of nickel hydroxide, a negative electrode made of a hydrogen-absorbing alloy, a separator, alkaline electrolyte, a metal case and a sealing plate equipped with a safety valve. In the cylindrical type, the positive and negative electrodes are separated by the separator and coiled in a spiral inside the case, being sealed by the sealing plate through an insulation gasket. In the prismatic type, the positive and negative electrodes are separated by the separator and stacked in layers inside the case, being sealed by the sealing plate.

Charge / Discharge Reactions