SYSTEMS AND METHODS FOR CELL BALANCING
First Claim
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1. A method for balancing a battery pack comprising a plurality of battery cells, wherein said battery cells are grouped into a plurality of battery modules, wherein said method comprises:
- accessing a plurality of cell parameters of said battery cells;
averaging cell parameters of battery cells in each of said battery modules to obtain an average cell parameter for each of said battery modules;
determining a donator group of battery modules and a receiver group of battery modules from said plurality of battery modules;
identifying a battery module having the maximum average cell parameter among said donator group of battery modules as a donator module;
identifying a battery module having the minimum average cell parameter among said receiver group of battery modules as a receiver module; and
transferring energy from said donator module to said receiver module to balance battery cells in said battery pack.
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Abstract
A method for balancing multiple battery cells which are grouped into multiple battery modules includes: obtaining cell parameters of the battery cells, respectively; calculating an average cell parameter for each of the battery modules according to the cell parameters; identifying a donator module and a receiver module from the battery modules based upon the average cell parameter; and transferring energy from the donator module to the receiver module to balance the battery cells.
9 Citations
18 Claims
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1. A method for balancing a battery pack comprising a plurality of battery cells, wherein said battery cells are grouped into a plurality of battery modules, wherein said method comprises:
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accessing a plurality of cell parameters of said battery cells; averaging cell parameters of battery cells in each of said battery modules to obtain an average cell parameter for each of said battery modules; determining a donator group of battery modules and a receiver group of battery modules from said plurality of battery modules; identifying a battery module having the maximum average cell parameter among said donator group of battery modules as a donator module; identifying a battery module having the minimum average cell parameter among said receiver group of battery modules as a receiver module; and transferring energy from said donator module to said receiver module to balance battery cells in said battery pack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for balancing a plurality of battery cells which are grouped into a plurality of battery modules, said system comprising:
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a detection and control unit operable for accessing a plurality of cell parameters of said battery cells, for selecting a donator group of battery modules and a receiver group of battery modules from said plurality of battery modules, for identifying a battery module having the maximum average cell parameter among said donator group of battery modules as a donator module, for identifying a battery module having the minimum average cell parameter among said receiver group of battery modules as a receiver module, and for generating control signals; and a conversion circuit coupled to said detection and control unit, and operable for transferring energy from said donator module to said receiver module according to said control signals to balance said battery cells. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification