Patent ID: 8723481
Filing Date: 2014-05-13
Classification: H01M,Y02E

Abstract:
1. A battery management system for a battery pack comprising: a plurality of battery modules; a plurality of first balancing units coupled to the plurality of battery modules; a plurality of second balancing units coupled to the plurality of battery modules, wherein first balancing units of the plurality of first balancing units and second balancing units of the plurality of second balancing units are coupled to each respective battery module; and a plurality of controllers coupled to the plurality of battery modules, wherein each controller is coupled to a respective battery module, wherein a first controller of the plurality of controllers is operable to control a first balancing unit of a first battery module to adjust a voltage output of the first battery module when the first controller determines the voltage output of the first battery module is greater than a combined voltage output of the first battery module and a second battery module, and wherein the first controller of the plurality of controllers is further operable to control a second balancing unit of the first battery module to adjust the combined voltage output of the first battery module and the second battery module when the first controller determines the combined voltage output of the first battery module and the second battery module is greater than the voltage output of the first battery module.