ELECTRIC DRIVE TYPE SERVICE VEHICLE

WIPO Patent Application WO/2007/105462

A1

An electric drive type power shovel vehicle (1) includes: a rotary body (11) having a travel device (2) capable of traveling; a shovel mechanism (12) arranged at a front portion of the rotary body (11); a hydraulic unit (30) for driving the shovel mechanism; an electric motor (33) for driving the hydraulic unit; a main battery (41) for supplying drive power to the electric motor to drive it; and a sub battery (44) having a nominal voltage higher than the main battery and capable of charging the main battery. The vehicle (1) further includes a connection selector (45) for selectively connecting the sub battery (44) to the electric motor (33) and the main battery (41). By connecting the sub battery to the electric motor by the connection selector, it is possible to drive the electric motor by the sub battery. By connecting the sub battery to the main battery by the connection selector, it is possible to charge the main battery by the sub battery.

TAKEUCHI AKIO (JP)
SHIMADA YOSHIHIDE (JP)
YOSHIOKA MASAO (JP)
TESHIMA KUNIKAZU (JP)
YAMAZAKI YUTAKA (JP)

PCT/JP2007/053454

September 20, 2007

February 20, 2007

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TAKEUCHI MFG (JP)
TAKEUCHI AKIO (JP)
SHIMADA YOSHIHIDE (JP)
YOSHIOKA MASAO (JP)
TESHIMA KUNIKAZU (JP)
YAMAZAKI YUTAKA (JP)

B60L11/18; B60L7/10; B60L8/00; E02F9/00; E02F9/20; H02J7/00

JP2002275945A	2002-09-25
JP2001012418A	2001-01-16
JPH10309002A	1998-11-17
JP2001003398A	2001-01-09
JP2001207478A	2001-08-03
JPH0562104U	1993-08-13

OHNISHI, Shogo (HIGASHI-IKEBUKURO SS BUILDING 1F 3-20-3, Higashi-Ikebukur, Toshima-ku Tokyo 13, JP)

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