Method of charging maintenance-free nickel metal hydride storage

Details Method of charging maintenance-free nickel metal hydride storage Method of charging maintenance-free nickel metal hydride storage

1998-03-03

1999-11-16

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Diverse charging or discharging rates for plural batteries

H01M 1044

Patent

active

059864320

ABSTRACT:
A method of charging an industrial maintenance-free Ni-MH storage cell, the method comprising in combination a first stage at a constant current I.sub.1 lying in the range I.sub.c /10 to I.sub.c /2, and a second stage at a constant current I.sub.2 lying in the range I.sub.c /50 to I.sub.c /10, the changeover from the first stage to the second stage taking place when the time derivative of the temperature reaches a threshold value which varies as a function of the temperature at the time of the changeover.

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