Balance correcting apparatus, electricity storage system, and transportation device

摘要

A balance correcting circuit is prevented from moving charges from a low-voltage electricity storage cell to a high-voltage electricity storage cell in a electricity storage system. The balance correcting circuit includes an inductor, a first switching device, a second switching device, and a control signal generating unit that supplies a control signal to the first and second switching devices to turn on and off the first and second switching devices so that the first switching device and the second switching device are alternately turned on and off. The control signal generating unit stops generating the control signal when receiving 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.

主权项

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.