Patent ID: 8841888
Filing Date: 2014-09-23
Classification: H01M,H02J,Y02E

Abstract:
1. A battery management system for a battery pack comprising: a battery module comprising a plurality of battery cells; a first voltage to current converter, coupled to a battery cell of the plurality of battery cells, configured to generate a current output according to a voltage of the battery cell; a current source coupled to the first voltage to current converter, wherein the current source comprises a second voltage to current converter operable for generating a threshold current according to a reference voltage, and the current source is operable for outputting a signal dependent upon a comparison of the current output and the threshold current, and wherein the first voltage to current converter and the second voltage to current converter have the same circuitry and are matched with each other; one or more logic devices, coupled to the current source, operable for generating an output according to the signal from the current source; and a controller, coupled to the one or more logic devices, operable to control at least one of the charging and discharging of the battery module based upon the output of the one or more logic devices.