Patent ID: 9007025
Filing Date: 2015-04-14
Classification: H02J

Abstract:
1. A method of charging a hybrid battery system, comprising: providing a hybrid battery system comprising at least two battery system terminals and two or more battery cell strings having respective separate and different current paths coupled together in parallel between the battery system terminals with a shared input current path to each of the respective separate and different current paths, the battery cell strings having at least one of different capacity or different impedance characteristics relative to each other and different values of maximum allowable charging current relative to each other; and applying a charging current to the battery system terminals to simultaneously charge the two or more battery cell strings with respective individual battery cell string currents through each of the respective separate and different current paths that do not exceed the maximum allowable charging current for either of the two or more battery cell strings, the charging current being applied through the shared current path to the respective separate and different current path of each of the given battery cell strings to charge the given battery cell string without individually controlling the individual battery cell string currents in the respective separate and different current paths.