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US 2020/0006958 A1Published application
System and Method For Battery Cell Balancing
AssigneeFord Global Technologies, LLC
InventorsRui Wang, Xu Wang, Patterson Kaduvinal Abraham
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Abstract
A system comprises a processor, configured to perform balancing on a commanded cell referring to a reference cell, and responsive to detecting balancing time exceeding a threshold time and state of charge (SOC) difference being above a tolerance, abort the balancing, and generate an error message. The threshold time depends on an average balancing time calculated using the SOC difference, a predetermined commanded cell capacity, and a predetermined balancing current.
Claims20
A system comprising:
- a processor configured to
- perform balancing on a commanded cell, and
- responsive to detecting a state of charge (SOC) difference between the commanded cell and a reference cell greater than a tolerance and detecting a balancing time exceeding a threshold time that depends on the SOC difference, a predetermined commanded cell capacity, and a predetermined balancing current, abort the balancing and generate an error message.
A battery system comprising:
- a processor configured to
- responsive to detecting a state of charge (SOC) difference between two cells exceeding a tolerance,
- calculate an average balancing time using the SOC difference, a predetermined cell capacity, and a predetermined balancing current,
- calculate a threshold time using the average balancing time,
- perform balancing on one of the two cells with higher SOC, and
- abort the balancing responsive to detecting a balancing time exceeding the threshold time.
3 more elements
A method for cell balancing, comprising:
- during balancing of a commanded cell, stopping by a controller the balancing responsive to detecting a state of charge (SOC) difference between the commanded cell and a reference cell greater than a tolerance and detecting a balancing time greater than a threshold time that depends on the SOC difference, a predetermined commanded cell capacity, and a predetermined balancing current.
Dependencies are inferred from the claim text.