Fuel cell/battery hybrid system having battery charge-level control
This patent describes a hybrid power source system for supplying electrical current to a load and for controlling the amount of current supplied in response to current demand from the load. It comprises: a primary electrical energy source couplable to the load through a first switch means interposed therebetween and having a predetermined maximum desired power output; first energy storage means couplable to the load in parallel with the primary electrical power source through a second switch means interposed between the first energy storage means and the load; second energy storage means couplable to the load in parallel with both the primary electrical power source and the first energy storage means through a third switch means interposed between the second energy storage means and the load, either the primary electrical energy source, the first and second energy storage means or combinations thereof being connected in parallel to supply current to the load depending upon whether the first, the second or the third switch means or combinations thereof are appropriately energized; load current sensing means for sensing the current flowing into the load; charge sensor means; and control means.
- Assignee:
- Engelhard Corp., Edison, NJ (USA)
- Patent Number(s):
- US 4931947; A
- Application Number:
- PPN: US 7-312327A
- OSTI ID:
- 7079591
- Resource Relation:
- Patent File Date: 16 Feb 1989
- Country of Publication:
- United States
- Language:
- English
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