ELECTRIC POWER SOURCE DEVICE

WIPO Patent Application WO/2006/022362

A2

A cooling fan (30) of a secondary battery (10) and a cooling fan (40) for a DC/DC converter (20) are parallelly arranged and share the same gas discharge path (80). On the secondary battery (10) are installed an air intake side temperature sensor (12) and a gas discharge side temperature sensor (14). When the cooling fan (30) is in failure, a temperature deviation between the air intake side and the gas discharge side in the secondary battery (10) becomes greater because of that routing around component (95) of a discharge gas (90) which comes through the gas discharge path (80) as the cooling fan (40) operates. Based on this phenomenon, when operation commands for both cooling fans (30, 40) are already issued, a control circuit (50) detects the failure of the cooling fan (30) by monitoring the difference between temperatures (Tb1, Tb2) detected by the temperature sensors (12, 14). Failure detection is possible without installing a sensor on each cooling fan.

KIYA NOBUAKI (JP)
KATAYAMA JUNTA (JP)

PCT/JP2005/015498

March 02, 2006

August 19, 2005

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TOYOTA MOTOR CO LTD (JP)
KIYA NOBUAKI (JP)
KATAYAMA JUNTA (JP)

B60L3/00; H01M10/60; H01M10/613; H01M10/625; H01M10/633; H01M10/6563; H02H5/04; H02J7/00

JP2003112531A	2003-04-15
JP2003178815A	2003-06-27
JP2002343449A	2002-11-29
JP2001210389A	2001-08-03

None

Fukami, Hisao (Nakanoshima Central Tower 22nd Floor, 2-7, Nakanoshima 2-chome, Kita-k, Osaka-shi Osaka, JP)

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