| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device that ensures safety and reliably prevents contact fusion and the like in view of various connections/disconnections of power supply devices having different potential differences.SOLUTION: A second power supply device 20 connectable to a first power supply device 10 includes: a connection section 40 for connecting the second power supply device 20 to the first power supply device 10; a second control section 21 for monitoring and controlling the operation of the second power supply device 20; a second secondary battery 23 for discharging a charge of electricity; and a switch section 22 for switching on/off a connection between two secondary batteries in response to the control of the second control section 21, in a battery network formed between the secondary batteries of the devices via the connection section 40 when the second power supply device 20 is connected to the first power supply device 10. The switch section 22 is controlled, when each power supply device is connected, such that a second main contact 51 is made after each secondary battery is connected via a resistance 52, and is controlled, when each power supply device is disconnected, such that the second main contact 51 is broken while both terminals of the second main contact 51 have the same potential. |
