System and method for controlling output of a battery pack
First Claim
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1. A method for providing notice of battery pack availability, comprising:
- sourcing or sinking an amount of current from a battery pack;
providing an indication of an available current limit for a battery pack; and
providing an indication of a capability of said battery pack to sink or source the amount of current at said available current limit, and where the capability of said battery pack to sink or source the amount of current is not a state of battery charge.
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Abstract
Systems and methods for communicating a state of a battery to a vehicle controller are disclosed. In one example, a battery pack outputs a signal indicative of an amount of capability the battery pack has to source or sink current at present operating conditions. The system and method may improve vehicle drivability and reduce battery pack degradation.
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Citations
20 Claims
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1. A method for providing notice of battery pack availability, comprising:
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sourcing or sinking an amount of current from a battery pack; providing an indication of an available current limit for a battery pack; and providing an indication of a capability of said battery pack to sink or source the amount of current at said available current limit, and where the capability of said battery pack to sink or source the amount of current is not a state of battery charge. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing notice of battery pack availability, comprising:
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sensing current entering or exiting a battery pack; providing an indication of an available current limit for a battery pack in response to said sensed current, where the available current limit is based on a ratio of filtered battery pack current and a continuous discharge limit of the battery pack; and providing an indication of a capability of said battery pack to sink or source the sensed amount of current at said available current limit, said indication of said capability of said battery pack to sink the sensed amount of current reduced as a state of charge of said battery pack increases, said indication of said capability of said battery pack to source said amount of current increased as a state of charge of said battery pack increases. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for providing notice of battery pack availability, comprising:
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a plurality of battery cells; a communication link; a current sensor in electrical communication with said plurality of battery cells; a first module including a first controller, said first controller including instructions for communicating a sensed battery pack current data in a digital format to a second module via said communication link, said sensed battery pack current retrieved from said current sensor; and a second module including a second controller, said second controller including instructions for receiving said battery pack current data in said digital format via said communication link, said second controller including further instructions for providing an indication of an available current limit for a battery pack to a vehicle controller, and said second controller including further instructions for providing an indication of a capability of said battery pack to sink or source a sensed battery pack current at said available current limit to said vehicle controller, where the capability of said battery pack to sink or source a sensed battery pack current is not a state of battery charge. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification