Power unit and safety circuit having the same

Details Power unit and safety circuit having the same Power unit and safety circuit having the same

2011-01-04

2011-01-04

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Personnel safety or limit control features

Reexamination Certificate

active

07863781

ABSTRACT:
A power unit including a plurality of series-connected battery modules and safety circuit wherein a service plug is inserted from the side of a terminal board of a battery pack, thereby establishing an electrical connection among battery modules. A connector is provided on a back of a terminal cover by way of a projecting section, and a second safety switch is activated by attachment of a terminal cover and insertion of the connector to the terminal board, thereby establishing an electrical connection among the battery modules. Even when the service plug is attached at the time of completion of maintenance without attachment of the terminal cover, the battery modules are still kept in an unconnected state by means of a second switch, and energization, which would otherwise arise with exposed terminals, is prevented.

REFERENCES:
patent: 6668963 (2003-12-01), Nada
patent: 2002/0017405 (2002-02-01), Nada
patent: 2006/0228919 (2006-10-01), Marukawa
patent: 2001-320801 (2001-11-01), None
patent: 2006-294425 (2006-10-01), None

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