System and method for monitoring and controlling parallel batteries
First Claim
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1. A power supply circuit, comprising:
- first and second power sources coupled in parallel;
a first circuit path that provides reverse current blocking and reverse polarity protection associated with positive terminals of the respective first and second power sources, the first circuit path including a first transistor to provide reverse polarity protection for output from the positive terminal of the first power source by a first body diode of the first transistor, and a second transistor to provide reverse polarity protection for output from the positive terminal of the second power source by a second body diode of the second transistor;
a second circuit path that bypasses current blocking of the first circuit path, the second circuit path including a first bypass channel of the first transistor, and a second bypass channel of the second transistor;
a third circuit path that provides reverse polarity protection associated with negative terminals of the respective first and second power sources, the third circuit path including a third transistor to provide reverse polarity protection by a third body diode of the third transistor for output from the negative terminal of the first power source, and a fourth transistor to provide reverse polarity protection by a fourth body diode of the fourth transistor for output from the negative terminal of the second power source; and
a bypass control circuit that controls the second circuit path based on determination of a predetermined condition.
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Abstract
A power supply circuit is provided that includes first and second power sources coupled in parallel, a first circuit path that provides reverse current blocking and reverse polarity protection associated with positive terminals of the respective first and second power sources, a second circuit path that bypasses current blocking of the first circuit path, a third circuit path that provides reverse polarity protection associated with negative terminals of the respective first and second power sources, and a bypass control circuit that controls the second circuit path based on determination of a predetermined condition.
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Citations
20 Claims
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1. A power supply circuit, comprising:
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first and second power sources coupled in parallel; a first circuit path that provides reverse current blocking and reverse polarity protection associated with positive terminals of the respective first and second power sources, the first circuit path including a first transistor to provide reverse polarity protection for output from the positive terminal of the first power source by a first body diode of the first transistor, and a second transistor to provide reverse polarity protection for output from the positive terminal of the second power source by a second body diode of the second transistor; a second circuit path that bypasses current blocking of the first circuit path, the second circuit path including a first bypass channel of the first transistor, and a second bypass channel of the second transistor; a third circuit path that provides reverse polarity protection associated with negative terminals of the respective first and second power sources, the third circuit path including a third transistor to provide reverse polarity protection by a third body diode of the third transistor for output from the negative terminal of the first power source, and a fourth transistor to provide reverse polarity protection by a fourth body diode of the fourth transistor for output from the negative terminal of the second power source; and a bypass control circuit that controls the second circuit path based on determination of a predetermined condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power supply circuit, comprising:
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a power source; a first circuit path that provides reverse current blocking and reverse polarity protection associated with a positive terminal of the power source, the first circuit path including a first transistor to provide reverse polarity protection for output from the positive terminal of the power source by a first body diode of the first transistor; a second circuit path that bypasses current blocking of the first circuit path, the second circuit path including a bypass channel of the first transistor; a third circuit path that provides reverse polarity protection associated with a negative terminals of the power source, the third path including a second transistor to provide reverse polarity protection by a second body diode of the second transistor for output from the negative terminal of the power source; and a bypass control circuit that controls the first and second circuit paths based on determination of a predetermined condition. - View Dependent Claims (12, 13)
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14. A method of protecting a power supply circuit comprising:
controlling a first and second circuit path, comprising; providing reverse current blocking and reverse polarity protection associated with positive terminals of respective first and second power sources; bypassing current blocking of the first circuit path in a second circuit path; providing reverse polarity protection associated with negative terminals of the respective first and second power sources; controlling the second circuit path based on determination of a predetermined condition; controlling a first bypass channel of a first transistor, wherein when the first bypass channel is turned on, output from the first power source flows through the first bypass channel instead of through a first body diode of the first transistor, and when the first bypass channel is turned off, output from the first power source undergoes reverse current blocking and reverse polarity protection by the first body diode; and controlling a second bypass channel of a second transistor, wherein when the second bypass channel is turned on, output from the second power source flows through the second bypass channel instead of through a second body diode of the second transistor, and when the second bypass channel is turned off, output from the second power source undergoes reverse current blocking and reverse polarity protection by the second body diode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
Specification