Charging of storage batteries
First Claim
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1. A method of charging a storage battery, utilizing a heavy charging phase followed by a pulse charging phase, and comprising the steps of:
- charging during said heavy charging phase with constant current until a predetermined battery voltage U1 is reached;
charging during the subsequent pulse charging phase with constant current pulses which include a charge-continuation interval t1 following the attainment of said battery voltage U1 in response to each said pulse;
shutting off the charging pulse at the end of each t1 interval for a pause of duration t2;
measuring the battery rest potential during a measuring interval t3 within said pause and comparing said rest potential with a reference value; and
terminating the pulse charging phase when said rest potential ceases to fall below said reference value during a measuring interval.
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Abstract
A battery is charged using a heavy charging phase, followed by a pulse charging phase. During the latter, charging continues beyond a predetermined battery voltage, for a predetermined interval. During a measuring portion of the succeeding charging pause, the falling battery rest potential is measured and the pulse charging phase is terminated when the measured rest potential no longer falls below a predetermined level.
16 Citations
7 Claims
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1. A method of charging a storage battery, utilizing a heavy charging phase followed by a pulse charging phase, and comprising the steps of:
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charging during said heavy charging phase with constant current until a predetermined battery voltage U1 is reached; charging during the subsequent pulse charging phase with constant current pulses which include a charge-continuation interval t1 following the attainment of said battery voltage U1 in response to each said pulse; shutting off the charging pulse at the end of each t1 interval for a pause of duration t2; measuring the battery rest potential during a measuring interval t3 within said pause and comparing said rest potential with a reference value; and terminating the pulse charging phase when said rest potential ceases to fall below said reference value during a measuring interval. - View Dependent Claims (2, 3, 4)
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5. A storage battery charging system wherein continuous heavy charging is used to bring the battery voltage up to a predetermined level U1, said system comprising:
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means responsive to the attainment of said voltage U1 to continue charging said battery for a period t1 and discontinuing said charging at the end of said period t1; means for sensing the dropping of said battery voltage after said discontinuing to a level U2; means responsive to said U2 level sensing to start both a measuring interval of duration t3 and a pause in the charging of duration t2 longer than t3; means for comparing said battery voltage with a reference voltage U3 lower than U2 during said measuring interval; and means for restarting said charging only if said battery voltage falls below said voltage U3 during said measuring interval t3. - View Dependent Claims (6, 7)
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Specification