| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular power supply system, capable of discriminating whether malfunctions are being produced in a voltage detection function, by detecting breaks in a reference connection line using a simple circuit configuration, thereby performing charging and discharging of battery modules, while protecting them. SOLUTION: This vehicular power supply system includes a running battery 11, where a plurality of battery modules 2 are connected to the positive and negative sides of a reference point 8, and the battery modules 2 on the positive and negative sides are connected serially through a contact point 7; a voltage detection circuit 3, for detecting the voltage at the connection point 7 relative to the reference point 8, which is connected to the connection point 7 via a detection switch 12 and connected to the reference point 8 of the running battery 1 via a reference connection line 9; and a control circuit 6 for switching on and off a detection switch 12. The voltage detection circuit 3 detects a break in the reference connection line 9, according to change in the voltage detected at the connection point 7, when the detection switch 12 is switched to on and off. COPYRIGHT: (C)2008,JPO&INPIT
|
