Patent ID: 9083188
Filing Date: 2015-07-14
Classification: H01M,H02J,Y02E

Abstract:
1. A balance correcting apparatus that equalizes voltages of a first electricity storage cell and a second electricity storage cell that are connected in series, 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; a control signal generating unit that has a first reference voltage input terminal electrically connected to the other end of the first electricity storage cell and a second reference voltage input terminal electrically connected to the other end of the second electricity storage cell, and 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; and a shunt regulator having one end electrically connected to the other end of the inductor and another end electrically connected to the second reference voltage input terminal of the control signal generating unit, the shunt regulator allowing current to flow from the one end of the shunt regulator to the other end of the shunt regulator when a voltage difference between voltages of the one end of and the other end of the shunt regulator is larger than a predetermined value.