Patent ID: 9059588
Filing Date: 2015-06-16
Classification: B60L,H01M,H02J,Y02E,Y02T

Abstract:
1. An apparatus for use in an electricity storage system including a first electricity storage cell and a second electricity storage cell connected in series, the apparatus comprising: a state transition signal generator that generates a state transition signal indicating that the electricity storage system transitions to and temporarily stays in a charging state while the electricity storage system is operating; and a balance correcting apparatus that equalizes voltages of the first electricity storage cell and the second electricity storage cell, the balance correcting apparatus comprising: an inductor having one end that is electrically connected to a connection point between one end of the first electricity storage cell and one end of the second electricity storage cell; a first switching device that is electrically connected between the other end of the inductor and the other end of the first electricity storage cell; a second switching device that is electrically connected between the other end of the inductor and the other end of the second electricity storage cell; and a control signal generating unit that supplies, to the first switching device and the second switching device, a control signal for controlling an ON-OFF operation of the first switching device and the second switching device to allow the first switching device and the second switching device to perform an ON-OFF operation alternately, wherein the control signal generating unit stops generating the control signal when receiving the state transition signal generated by the state transition signal generator.