Title:
ACCUMULATOR
Document Type and Number:
WIPO Patent Application WO/2008/029820
Kind Code:
A1
Abstract:
An accumulator has a configuration as follows. A DC current-inhibiting capacitor
(11) and a resistor (13) are connected in series to both ends of an accumulation
unit (1). An ON/OFF circuit (17) is connected in parallel to the resistor (13).
A voltage peak hold circuit (19) is connected in parallel to the ON/OFF circuit
(17). Furthermore, a current detecting unit (15) is connected in series to the
accumulation unit (1). A current peak hold circuit (16) is connected to the output
of the current detecting unit (15). When the current flowing from the positive
electrode to the negative electrode of the accumulation unit (1) is assumed to
be positive, control is performed to turn ON the ON/OFF circuit (17) if the current
is negative and to turn OFF the ON/OFF circuit (17) if the current is positive.
The peak hold voltage value of the voltage peak hold circuit (19) thus obtained
and the peak hold current value of the current peak hold circuit (16) are used to
obtain an internal resistance value of the accumulation unit (1), thereby making
a degradation judgment.
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Inventors:
MORITA, Kazuki (())
森田 一樹 (())
森田 一樹 (())
Application Number:
JP2007/067253
Publication Date:
March 13, 2008
Filing Date:
September 05, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 5718501, JP)
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
MORITA, Kazuki (())
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
MORITA, Kazuki (())
International Classes:
B60L3/00; B60L11/18
Attorney, Agent or Firm:
IWAHASHI, Fumio et al. (1006, Oaza Kadom, Kadoma-shi Osaka 01, 5718501, JP)
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