US 6,388,427 B1 · Battery temperature derivative charging

Abstract

A method of charging a nickel-hydrogen battery which includes a positive electrode, a negative electrode and an electrolyte, after the battery has been subject to discharge is disclosed the method comprising the steps of: (a) subjecting the battery to a high charge rate for a period until the battery temperature increases at least ΔT1 over the local minimum battery temperature; (b) switching the battery charge level to a lower rate of charge than in step (a) for a period until the battery temperature increases at least ΔT2 over the local minimum battery temperature; (c) switching the battery charge level to a much lower rate of charge than step (b) for a period up to about 30 to 60 minutes before the next scheduled eclipse; and thereafter (d) switching the battery to a pulse charge equivalent to the high charge rate of step (a).

Claims11

Dependent claims

A method of charging a nickel-hydrogen battery which includes a positive electrode, a negative electrode, and an electrolyte, after the battery has been subject to discharge, the method comprising the steps of:

(a) subjecting said battery to a high charge rate for a period until the battery temperature increases at least ΔT1, where ΔT1 is about 2° C., over the local minimum battery temperature;
(b) switching the battery charge level to a lower rate of charge than in step (a) for a period until the battery temperature increases at least ΔT2, where ΔT2 is about 2° C., over the local minimum battery temperature;
(c) switching the battery charge level to a trickle rate which is lower than step (b) for a period up to about 30 to 60 minutes before a next scheduled eclipse;
and thereafter
(d) switching the battery to a pulse charge equivalent to the high charge rate of step (a).

2 more elements

Dependencies are inferred from the claim text.

Battery temperature derivative charging

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Battery temperature derivative charging

Life of this patent

Abstract

Claims11