| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power system where over-discharging and deterioration of a battery pack formed of a plurality of batteries are suppressed, and restoration from a stop state of power supply is available. <P>SOLUTION: The operation power of a control part 3 for monitoring output voltage of the pack battery 1 and controlling opening/closing of a switching element 4 and an operation of a load 2 is supplied from the pack battery 1 through a power supply line into which the switching element 4 is inserted. When output voltage of the pack battery 1 is not more than a voltage threshold which is previously decided, the switching element 4 is opened, the operation of the load 2 is stopped and the power supply operation of the pack battery 1 is completely stopped. When there is no power supply to the control part 3, the switching element 4 is opened and the state where the operation of the load 2 is stopped is continued. A manual switch 5 connected to the switching element 4 in parallel is operated after exchange of the pack battery 1. Thus, the power supply operation from the pack battery 1 to the control part 3 is resumed, the switching element 4 is closed, and the operation of the load 2 is resumed, by control of the resumed control part 3. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
