Title:
BATTERY VOLTAGE DETECTOR
Document Type and Number:
WIPO Patent Application WO/2000/016108
Kind Code:
A1
Abstract:
A battery unit (20) comprises a number of cells connected in series, and a voltage detector (13) is connected with each cell block (19) consisting of a plurality of cells. In the voltage detection circuit (13), the voltage across each cell block (19) is detected by a differential amplifier (2), converted to digital form, and applied to a controller through a photocoupler (7). The differential amplifier (2) and the cell block (19) are connected through optical relays (5, 6), which are closed by an ON/OFF control signal only when voltage is detected, so that no current leakage occurs. The differential amplifier (2) and an analog-to-digital converter (3) are powered by the cell block (19) through regulators (11, 12), respectively, to eliminate the effects of noise.
Inventors:
TAKADA MASAHIRO (JP)
TAMESUE KAZUHIKO (JP)
TORII YUJI (JP)
TAMESUE KAZUHIKO (JP)
TORII YUJI (JP)
Application Number:
PCT/JP1999/004995
Publication Date:
March 23, 2000
Filing Date:
September 13, 1999
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)
TAKADA MASAHIRO (JP)
TAMESUE KAZUHIKO (JP)
TORII YUJI (JP)
TOYOTA MOTOR CO LTD (JP)
TAKADA MASAHIRO (JP)
TAMESUE KAZUHIKO (JP)
TORII YUJI (JP)
International Classes:
B60R16/04; B60L11/18; B60L50/10; G01R19/165; G01R31/36; H02J7/02; (IPC1-7): G01R19/165; G01R31/36; B60L3/00
Foreign References:
| JPH09159701A | 1997-06-20 | |||
| JPH0717014Y2 | 1995-04-19 | |||
| JPH0915311A | 1997-01-17 | |||
| JPH08140204A | 1996-05-31 | |||
| JPH11160367A | 1999-06-18 | |||
| JPH09171065A | 1997-06-30 | |||
| JPH04118671U | 1992-10-23 | |||
| JPH08140204A | 1996-05-31 | |||
| US5712568A | 1998-01-27 |
Other References:
See also references of EP 1126282A4
Attorney, Agent or Firm:
Ishihara, Masaru (5th floor 1-6, Nishi-tenma 3-chome Kita-ku Osaka-shi Osaka, JP)
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