Battery cell balancing system
First Claim
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1. A battery cell balancing system for a battery having a plurality of cells comprising:
- a power supply;
a plurality of transformer/rectifier circuits electrically coupled to the plurality of cells and preferentially charging a cell of the plurality of cells having a lowest state of charge; and
at least one current limiting device electrically coupled to said plurality of transformer/rectifier circuits and said power supply, said current limiting device buffering a source voltage from a reflected voltage of at least one of the plurality of cells.
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Abstract
A battery cell balancing system (12) for a battery (30) having a plurality of cells (32) is provided. The system (12) includes a power supply (38) and a plurality of transformer/rectifier circuits (34) electrically coupled to the cells (32). Preferential charging occurs for a cell with the lowest state of charge. At least one current limiting device (36) is electrically coupled to the transformer/rectifier circuits (34) and the power supply (38). The current limiting device (36) buffers a source voltage from a reflected voltage of at least one of the plurality of cells (32). A method of performing the same is also provided.
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Citations
20 Claims
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1. A battery cell balancing system for a battery having a plurality of cells comprising:
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a power supply;
a plurality of transformer/rectifier circuits electrically coupled to the plurality of cells and preferentially charging a cell of the plurality of cells having a lowest state of charge; and
at least one current limiting device electrically coupled to said plurality of transformer/rectifier circuits and said power supply, said current limiting device buffering a source voltage from a reflected voltage of at least one of the plurality of cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of balancing battery cells for a battery having a plurality of cells comprising:
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buffering a source voltage from a reflected voltage of at least one of the plurality of cells; and
preferentially charging a cell having a lowest stale of charge. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A battery cell balancing system for a battery having a plurality of cells comprising:
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a plurality of transformer/rectifier circuits electrically coupled to the plurality of cells;
a plurality of balancing switches electrically coupled to said plurality of transformer/rectifier circuits allowing at least one cell of the plurality of cells to charge when an associated differential voltage is greater than a first predetermined value;
at least one current limiting device electrically coupled to said plurality of transformer/rectifier circuits and a power supply, said current limiting device buffering a source voltage from a reflected voltage of at least one of the plurality of cells; and
a controller electrically coupled to said plurality of balancing switches, said controller operating said plurality of balancing switches in response to determining whether to charge a cell in the plurality of cells and allowing preferentially charging of the plurality of cells. - View Dependent Claims (20)
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Specification