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Patent Searching and Data


Title:
ELECTRIC POWER DEVICE FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JP2002325377
Kind Code:
A
Abstract:

To provide an electric power device for automobile which has long service life and reduces in the manufacturing cost.

The device has a motor generator 2, an inverter 3 for driving the motor generator, a battery 6, and an electric double-layer capacitor 5. The electric double-layer capacitor 5 is connected directly to the DC side of the inverter 3, and the battery 6 is connected, in parallel with the electric double- layer capacitor 5 via a first switching means 11. The capacitor 5 power is employed at the start of an engine 1, and the battery 6 is disconnected by turning the switching means 11, 12 off. The capacitor 5 in general has a smaller internal resistance than a battery and has a small voltage drop, even at the discharge of large currents. Furthermore, the capacitor 5 has proper temperature characteristics, and its drop in output is smaller than a battery, even at a temperature of as low as -30°C. Thus, the engine can be surely started by utilizing the capacitor.


Inventors:
AMANO MASAHIKO
MOROOKA YASUO
MIYAZAKI TAIZO
HANIYU MICHIYUKI
Application Number:
JP2001000127044
Publication Date:
November 08, 2002
Filing Date:
April 25, 2001
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
B60R16/033; B60K6/20; B60K6/28; B60K6/485; B60L50/16; F02N11/04; F02N11/08; H02J7/14; H02J7/34; (IPC1-7): H02J7/14; B60K6/02; B60R16/02; F02N11/04; F02N11/08; H02J7/34
Attorney, Agent or Firm:
春日 讓