| 摘要 |
A power storage device is in parallel to a battery, and is connected to a power supply line and a ground line. A service plug internally includes a resistance and is attached to the power storage device for connecting the resistance between contacts of a relay circuit. The service plug is a member independent of an ordinary service plug arranged at the power storage device. When residual charges in the power storage device are substantially zero, an operator appropriately attaches the service plug to the power storage device in place of the ordinary service plug. Accordingly, when the power storage device enters an overdischarged state due to a maintenance or the like of the power storage device, a vehicle system to which the service plug internally having a current limiting device is attached is started so that occurrence of a rush current can be prevented.
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