System and method for controlling output of a battery pack
First Claim
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1. A method for controlling output of a battery pack, comprising:
- opening a contactor that electrically couples said battery pack to an electrical circuit external of said battery pack when an integration of a degree and duration of a value of a variable or parameter related to a tracked variable of the battery pack exceeds a threshold amount, the variable or parameter integrated up when the tracked variable of said battery pack is greater than a threshold amount, and wherein the variable or parameter is related to a battery cell voltage of said battery pack is influenced by a source external of said battery pack, and wherein said value of said variable is integrated down when said tracked variable of said battery pack is not greater than said threshold amount.
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Abstract
Systems and methods for controlling the output of a battery pack are disclosed. In one example, a battery pack contactor is opened in response to battery pack current. The system and method may reduce battery pack degradation and increase system flexibility.
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Citations
12 Claims
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1. A method for controlling output of a battery pack, comprising:
opening a contactor that electrically couples said battery pack to an electrical circuit external of said battery pack when an integration of a degree and duration of a value of a variable or parameter related to a tracked variable of the battery pack exceeds a threshold amount, the variable or parameter integrated up when the tracked variable of said battery pack is greater than a threshold amount, and wherein the variable or parameter is related to a battery cell voltage of said battery pack is influenced by a source external of said battery pack, and wherein said value of said variable is integrated down when said tracked variable of said battery pack is not greater than said threshold amount. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for controlling output of a battery pack, comprising:
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a plurality of battery cells; a current sensor in electrical communication with said plurality of battery cells; a contactor in electrical communication with said plurality of battery cells and a load external said battery pack; and a controller, said controller in communication with said current sensor and said contactor, said controller including instructions for opening said contactor when an integration of a degree and duration of a value of a variable or parameter related to a tracked variable of said battery pack exceeds a threshold amount, and wherein said tracked variable is a current from said current sensor, where integration of said degree and duration of said value of said variable or parameter increases said value of said variable or parameter when said tracked variable of said battery pack exceeds said threshold, and where integration of said degree and duration of said value of said variable or parameter decreases said value of said variable or parameter when said tracked variable of said battery pack does not exceed said threshold, and further comprising a plurality of battery modules comprised of said plurality of battery cells. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification