초록 ▼

This invention includes a trickle charging circuit that works with a series charging element to charge battery cells with a low, constant current when the voltage of the cell is below a predetermined operational range. The trickle charging circuit includes a control transistor that is actuated by a

This invention includes a trickle charging circuit that works with a series charging element to charge battery cells with a low, constant current when the voltage of the cell is below a predetermined operational range. The trickle charging circuit includes a control transistor that is actuated by a current source when both the power supply and undervoltage battery cell are coupled. The trickle charging continues until a minimum operational voltage of the cell is reached. The invention includes a means for rapid charging the cell once the cell voltage is within a preferred operational range. The circuit includes means for charging at other currents, like mid-rate currents, as well.

대표청구항 ▼

1. A circuit for trickle charging a rechargeable battery cell, the circuit comprising:a. at least one rechargeable battery cell; b. at least one power source; c. at least one pass element coupled serially between the at least one rechargeable battery cell and the at least one power source; d. a cont

1. A circuit for trickle charging a rechargeable battery cell, the circuit comprising:a. at least one rechargeable battery cell; b. at least one power source; c. at least one pass element coupled serially between the at least one rechargeable battery cell and the at least one power source; d. a control transistor having a control node, the control transistor being coupled to the at least one pass element; e. a means for sourcing current coupled to the control node; f. a means for generating a voltage in response to the means of sensing current coupled to the control node; and g. a means for termination coupled to the control transistor.