Energy storage apparatus and failure diagnosis method
AssigneeGS Yuasa International Ltd.
InventorYuki Ueda
Life of this patent
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Abstract
An energy storage apparatus includes: an external terminal 51; an energy storage cell 62; a current interruption device 53 that has one end electrically connected to the external terminal 51 and the other end electrically connected to the energy storage cell 62; a discharge circuit 110 that discharges electricity from the energy storage cell 62 via a path that does not pass through the current interruption device 53; and a failure diagnosis device 150. The failure diagnosis device 150 discharges electricity from the energy storage cell 62 using the discharge circuit 110, and diagnoses a failure of the current interruption device 53 based on a change in voltage ΔV1 of the external terminal 51 before and after discharging electricity.
Claims6
An energy storage apparatus comprising:
- an external terminal;
- an energy storage cell;
- a current interruption device that has one end electrically connected to the external terminal and another end electrically connected to the energy storage cell;
- a discharge circuit that discharges electricity from the energy storage cell via a path that does not pass through the current interruption device;
- and
- a failure diagnosis device,
- wherein the failure diagnosis device discharges electricity from the energy storage cell using the discharge circuit, and diagnoses a failure of the current interruption device based on a change in voltage of the external terminal before and after discharging electricity.
A failure diagnosis method of a current interruption device, which has one end electrically connected to an external terminal and another end electrically connected to an energy storage cell, the method comprising:
- a step of discharging electricity from the energy storage cell via a path that does not pass through the current interruption device;
- and
- a step of diagnosing a failure of the current interruption device based on a change in voltage of the external terminal before and after discharging electricity.
Dependencies are inferred from the claim text.