Title:
二電池型電気自動車の電池監視装置
Document Type and Number:
Japanese Patent JP4035941
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a battery monitor for two-battery-type electric vehicles which enables enhancement in the accuracy of detecting the voltage of a main battery, without complication of the circuitry thereof. SOLUTION: The battery monitor comprises a main battery 3 of higher voltage, a sub-battery 2 of lower voltage, voltage detection circuits 51 and 52, and a supply voltage supplying circuit 3 that is supplied with power from the sub-battery 3 and supplies the voltage detection circuits 51 and 52 with power. The supply voltage supplying circuit 3 comprises an inverter 42, a multiple output-type transformer 44, and rectifiers 45 to 47. The coefficient of electromagnetic coupling between the primary coil 441 of the multiple output-type transformer 44 and the secondary coil 444 for power supply to low-voltage load is set to a value smaller than the coefficient of electromagnetic coupling between the primary coil 441 and the secondary coils 442 and 443 for power supply to voltage detection circuit. Therefor, the fluctuation in the supply voltage of the voltage detection circuits 51 and 52 due to the fluctuation in the current in the secondary coil 444 for power supply to low-voltage load is reduced.
Inventors:
Tetsuya Kobayashi
Application Number:
JP2000148495A
Publication Date:
January 23, 2008
Filing Date:
May 19, 2000
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B60L3/00; G01R31/36; H01M10/48
Domestic Patent References:
| JP11160367A | ||||
| JP2000124039A |
Attorney, Agent or Firm:
Hiroshi Okawa