ELECTRIC INDUSTRIAL VEHICLE

WIPO Patent Application WO/2011/024707

A1

Disclosed is an electric industrial vehicle that is provided with a power supply system device that can drive a drive unit in a highly efficient manner during both regeneration and powering by means of a simple computation method. The power supply system device (3) of the electric industrial vehicle is configured from a lead battery (2), a high-capacitance capacitor (13), a DC/DC converter that controls the voltage of the high-capacitance capacitor (13), and a controller (11) that controls the charge and discharge power of the lead battery (2) and the high-capacitance capacitor (13). When the electric motors (4, 6) that are the drive sources of the electric industrial vehicle are performing a powering operation, the controller (11) decides the current distribution of the lead battery (2) and the high-capacitance capacitor (13) on the basis of the internal resistance of the lead battery (2) and the high-capacitance capacitor (13) and the required power load of the electric motors (4, 6) such that losses are minimized in the power supply system device (3).

KANEKO SATORU (JP)
IKIMI TAKASHI (JP)
IZUMI SHIHO (JP)
MORIKI HIDEKAZU (JP)
MASANO NOBUO (JP)

PCT/JP2010/064012

March 03, 2011

August 19, 2010

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HITACHI CONSTRUCTION MACHINERY (JP)
KANEKO SATORU (JP)
IKIMI TAKASHI (JP)
IZUMI SHIHO (JP)
MORIKI HIDEKAZU (JP)
MASANO NOBUO (JP)

B60L11/18; B60L7/14; H01M10/48; H02J7/00; B60L1/00

WO2009013891A1

2009-01-29

JP2003219566A	2003-07-31
JP2009044808A	2009-02-26
JP2002325378A	2002-11-08

The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)

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