NiCd/NiMH battery charger
First Claim
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1. A battery charging system for independently charging NiCd and/or NiMH batteries, comprising:
- (a) means for independently charging each of said batteries to a first reference voltage of up to about 1.40 V/cell at a temperature of 25°
C. with a fast charging current;
(b) means for independently charging each of said batteries from said reference voltage of about 1.40 V/cell to a second reference voltage of about 1.48 V/cell at a temperature of 25°
C. with a slow charging current; and
(c) means for independently charging each of said batteries above said second reference voltage with a trickle charging current.
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Abstract
A battery charging system and method of operating the system is provided which can charge either NiCd and/or NiMH batteries with significant permanent recombinant capacity sufficient to permit cell charge completion, as well as charge maintenance, in an acceptable period of time.
45 Citations
29 Claims
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1. A battery charging system for independently charging NiCd and/or NiMH batteries, comprising:
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(a) means for independently charging each of said batteries to a first reference voltage of up to about 1.40 V/cell at a temperature of 25°
C. with a fast charging current;(b) means for independently charging each of said batteries from said reference voltage of about 1.40 V/cell to a second reference voltage of about 1.48 V/cell at a temperature of 25°
C. with a slow charging current; and(c) means for independently charging each of said batteries above said second reference voltage with a trickle charging current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of independently charging NiCd and/or NiMH batteries, comprising the steps of:
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(a) independently charging each of said batteries to a first reference voltage of upto about 1.40 V/cell with a fast charging current; (b) independently charging each of said batteries from said first reference voltage to a second reference voltage of about 1.48 V/cell with a slow charging current; and (c) independently charging each of said batteries above said second reference voltage with a trickle charging current. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A battery charging system for charging a string of serially connected NiCd and/or NiMH cells, comprising:
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(a) means for charging said string of cells to a first reference voltage of upto about 1.40 V/cell at a temperature of 25°
C. with a fast charging current;(b) means for independently charging said string of batteries from said voltage of about 1.40 V/cell to a second reference voltage of about 1.48 V/cell at a temperature of 25°
C. with a slow charging current; and(c) means for independently charging said string of cells above said second reference voltage with a tickle charging current. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of charging a string of serially connected NiCd and/or NiMH cells, comprising the steps of:
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(a) charging said string of cells to a first reference voltage of upto about 1.40 V/cell at a temperature of 25°
C. with a fast charging current;(b) charging said string of cells from said voltage of about 1.40 V/cell to a second reference voltage of about 1.48 V/cell at a temperature of 25°
C. with a slow charging current; and(c) charging said string of cells above said second reference voltage with a tickle charging current. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification