Method and apparatus for charging lead acid batteries
First Claim
1. A method for pulse charging a lead acid battery comprising in combination the steps of:
- 1) providing dc voltage for charging the battery;
2) pulsing the dc voltage for a predetermined period of time to charge the battery;
3) discharging the battery after a charging pulse;
4) sensing the voltage across the battery after discharging the battery by taking two samples of the battery voltage after discharging the battery;
5) comparing the sensed voltage to a predetermined value to determine the charge state of the battery; and
6) repeating steps 1 through 5 until the sensed voltage indicates that the desired charge state of the battery has been reached.
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Abstract
Battery charger apparatus and method includes a clock to provide timing information and logic to control the charging time of a battery being charged. The logic also controls a discharge time period in which the battery being charged is discharged for a relatively short period of time. After the discharge time, the voltage across the battery terminals is sensed by the logic to determine the state of the charge of the battery. The pulsing of the battery, in which the charging times and discharging times are alternated, and then the sensing of the battery voltage, is controlled by the logic to provide the charging of a battery in the shortest possible time period.
13 Citations
15 Claims
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1. A method for pulse charging a lead acid battery comprising in combination the steps of:
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1) providing dc voltage for charging the battery; 2) pulsing the dc voltage for a predetermined period of time to charge the battery; 3) discharging the battery after a charging pulse; 4) sensing the voltage across the battery after discharging the battery by taking two samples of the battery voltage after discharging the battery; 5) comparing the sensed voltage to a predetermined value to determine the charge state of the battery; and 6) repeating steps 1 through 5 until the sensed voltage indicates that the desired charge state of the battery has been reached. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for pulse charging a lead acid battery comprising in combination the steps of:
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1) providing rectified dc voltage for charging the battery; 2) pulsing the rectified dc voltage for a predetermined period of time to charge the battery; 3) discharging the battery after a charging pulse; 4) sensing the voltage of the battery after discharging the battery by sampling the battery voltage a plurality of times after discharging the battery; 5) comparing the sensed voltage to a predetermined value to determine the charge state of the battery; and 6) repeating steps 1 through 5 until the sensed voltage indicates that the desired charge state of the battery has been reached. - View Dependent Claims (14, 15)
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Specification