Electric power unit

Motor vehicles – Power – Battery mountings and holders

Reexamination Certificate

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Details

C454S105000

Reexamination Certificate

active

06220383

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electric power unit for a hybrid car having an engine, a drive motor and a secondary battery.
2. Description of the Related Art
Because a secondary battery for a hybrid car generates much heat when it is charged, a motor-driven cooling fan is necessary to cool the secondary battery.
When the cooling fan operates, dust may enter the inside of the fan motor and cause various troubles. The fan motor, which generates heat by itself, is heated by the secondary battery, thereby causing deterioration of insulation members of the fan motor.
SUMMARY OF THE INVENTION
The present invention has an object of providing an improved reliable electric power unit without increase in the production cost.
According to a main aspect of the present invention, in an electric power unit composed of a secondary battery, a cooling fan for cooling the secondary battery, a fan motor for driving the cooling fan and a case, a partition is provided for isolating the fan motor from the secondary battery and cooling fan.
The above electric power unit may have a magnetic joint disposed between the motor and the cooling fan. The magnetic joint preferably includes an input member having a plurality of permanent magnet members and an output member having a plurality of permanent magnets disposed to oppose the permanent magnet of the input member. The partition is preferably disposed between the input member and the output member of the magnetic joint.


REFERENCES:
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patent: 3860064 (1975-01-01), Murphy
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patent: 4362208 (1982-12-01), Hauser
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patent: 5490572 (1996-02-01), Tajiri et al.
patent: 5620057 (1997-04-01), Klemen et al.
patent: 5690519 (1997-11-01), Chen
patent: 2640400 (1977-03-01), None
patent: 4-24185 (1992-01-01), None
patent: 6-1994 (1994-01-01), None

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