BATTERY STATE DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a battery state detection system capable of adequately detecting the state of a battery irrespective of the state of a vehicle. SOLUTION: A battery state detection system 20 has a microcomputer 10 which is fixed to a lead battery 1, and calculate the charging state of the lead battery 1. A positive terminal of the lead battery 1 is connected to a starter 9 via an IGN switch 5. A capacitor 14 is connected to the positive terminal of the lead battery 1 parallel to the lead battery 1. A diode 15 is inserted between the lead battery 1 and the capacitor 14. The anode side of the diode 15 is connected to the positive terminal side of the lead battery 1. Even if a voltage of the lead battery 1 is dropped during power supply to the starter 9, the supply of power accumulated in the capacitor 14 is prevented by the diode 15, and the power of the capacitor 14 is supplied to the microcomputer 10. COPYRIGHT: (C)2008,JPO&INPIT