Multiple battery switchover circuits

Details Multiple battery switchover circuits Multiple battery switchover circuits

1997-03-06

1998-06-09

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Parallel connected batteries

307 66, H02J 700

Patent

active

057640327

ABSTRACT:
Multiple battery switchover circuits for selective interconnecting any one of multiple batteries to a load or a charger while maintaining isolation with other batteries of the system. The present invention maintains the required isolation and interconnection capabilities using only three MOSFETs per battery instead of the four required by the prior art. The three MOSFETs for any one battery in the switchover circuit are connected with one current carrying connection in common, with the other current carrying connection of the MOSFETs being coupled to the charger, the load and a respective battery, respectively. Appropriate connection of the MOSFETs assures that as to any possible conduction path through two of the three MOSFETs, one of the MOSFETs has its parasitic diode back biased. Alternate embodiments are disclosed.

REFERENCES:
patent: 4754160 (1988-06-01), Ely
patent: 5598041 (1997-01-01), Willis

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