Power source switching system for electric motor vehicles

Details Power source switching system for electric motor vehicles Power source switching system for electric motor vehicles

1996-05-15

1998-01-13

Johnson, Brian L.

Motor vehicles

With means for promoting safety of vehicle, its occupant or...

Responsive to engagement of portion of perimeter of vehicle...

180274, 180 651, B60K 2810

Patent

active

057069107

ABSTRACT:
A power source switching system for electric motor vehicles comprises a plurality of secondary cell units as a power source, one or more discriminating sensors for detecting vehicle information, a control device for accepting a signal from the sensors and a switching circuit for switching the connection state of the plurality of secondary cell units, responsive to a control signal issued by the control device. In one embodiment of the invention, the discriminating sensor detects the occurrence of an impact shock, with the switching circuit changing the connection state of the plurality of secondary cell units into a parallel connection to prevent short circuiting. In another embodiment of the invention, the discriminating sensor detects whether the vehicle is operating in a running mode, an inertia running mode or a regenerative braking mode respectively, with the switching circuit changing the connection state of the plurality of secondary cell units from a serial connection to a parallel connection or from a parallel connection to a serial connection in accordance with the control signal generated by detecting the operating mode, to prevent overcharging cycles which are detrimental to cell life.

REFERENCES:
patent: 5238083 (1993-08-01), Horie et al.
patent: 5565711 (1996-10-01), Hagiwara

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