Energy storage apparatus and failure diagnosis method
AssigneeGS Yuasa International Ltd.
InventorYuki UEDA
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Abstract
An energy storage apparatus includes: an external terminal; an energy storage cell; a current interruption device that has one end electrically connected to the external terminal and the other 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. 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 ΔV1 of the external terminal before and after discharging electricity.
Claims18
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;
- and
- a diagnosis device that diagnoses the current interruption device based on a change in voltage of the external terminal in response to the discharge circuit discharging electricity from the energy storage cell.
A diagnosis method using 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:
- discharging electricity from the energy storage cell;
- and
- diagnosing a current interruption device based on a change in voltage of the external terminal.
Dependencies are inferred from the claim text.