BATTERY MANAGEMENT SYSTEMS AND METHODS
First Claim
1. A battery management system comprising:
- a switch array operable for selecting a battery module from a plurality of battery modules in a battery pack based upon a conduction state of said switch array; and
a first controller coupled to said switch array and operable for receiving measurement information of cells in said battery pack through said switch array; and
a second controller coupled to said switch array and said first controller and operable for providing a control signal to control said conduction state of said switch array,wherein said first controller further controls a balance circuit coupled to battery pack to balance a selected battery module if said selected battery module is identified as an unbalanced battery module based upon measurement information associated with said selected battery module.
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Accused Products
Abstract
A battery management system includes a switch array, a first controller and a second controller. The switch array selects a battery module from multiple battery modules in a battery pack based upon a conduction state of the switch array. The first controller is coupled to the switch array and receives measurement information of cells in the battery pack through the switch array. The second controller is coupled to the switch array and the first controller and provides a control signal to control the conduction state of the switch array. The first controller further controls a balance circuit coupled to the battery pack to balance a selected battery module if the selected battery module is identified as an unbalanced battery module based upon measurement information associated with the selected battery module.
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Citations
22 Claims
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1. A battery management system comprising:
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a switch array operable for selecting a battery module from a plurality of battery modules in a battery pack based upon a conduction state of said switch array; and a first controller coupled to said switch array and operable for receiving measurement information of cells in said battery pack through said switch array; and a second controller coupled to said switch array and said first controller and operable for providing a control signal to control said conduction state of said switch array, wherein said first controller further controls a balance circuit coupled to battery pack to balance a selected battery module if said selected battery module is identified as an unbalanced battery module based upon measurement information associated with said selected battery module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for managing a battery pack comprising a plurality of battery modules, said method comprising:
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obtaining measurement information of cells in said plurality of battery modules of said battery pack by a first controller; selecting said plurality of battery modules to be coupled to said first controller during a plurality of time segments, wherein each of said battery modules is electrically coupled to said first controller during a corresponding time segment; and balancing cells in a selected battery module when said selected battery module is identified as an unbalanced battery module based upon measurement information associated with said selected battery module. - View Dependent Claims (16, 17, 18, 21)
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19-20. -20. (canceled)
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22. A vehicle comprising:
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a battery system for providing electric power; an engine coupled to said battery system and for converting said electric power to motion energy; a vehicle body for accommodating said battery system and said engine; and a plurality of wheels underneath said vehicle body and for moving said electric vehicle when propelled by said motion energy from said engine, wherein said battery system comprises; a battery pack; a switch array operable for selecting a battery module of a plurality of battery modules in said battery pack based upon a conduction state of said switch array; and a first controller coupled to said switch array and operable for receiving measurement information of cells in said battery pack through said switch array; and a second controller coupled to said switch array and said first controller and operable for providing a control signal to control said conduction state of said switch array, wherein said first controller further controls a balance circuit coupled to battery pack to balance a selected battery module if said selected battery module is identified as an unbalanced battery module based upon measurement information associated with said selected battery module.
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Specification