Power fault battery protection circuit
First Claim
1. A battery protection circuit, comprising:
- a. at least one rechargeable cell;
b. a safety circuit coupled to the at least one rechargeable cell, the safety circuit comprising a means for monitoring a voltage across the at least one rechargeable cell, further comprising a means for monitoring a current flowing through the at least one rechargeable cell;
c. at least one disconnect means coupled serially with the at least one rechargeable cell;
d. a means of monitoring power being delivered either to or from the al least one rechargeable cell; and
e. a means for simulating an overcurrent condition within the safety circuit when the means for monitoring power determines that the power being delivered either to or from the at least one rechargeable cell exceeds a predetermined threshold.
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Accused Products
Abstract
A battery protection circuit is provided that includes a safety circuit and an overpower circuit. The safety circuit monitors the voltage and current of at least one rechargeable cell within the battery pack, and disconnects the cell(s) from the external terminals of the battery pack when either the voltage becomes too high or low, or when excessive current is being drawn from the battery pack. The overpower circuit monitors the power being delivered to or sourced from the battery pack to the load. The overpower circuit actuates when the power exceeds a predetermined threshold, thereby simulating an overcurrent condition in the safety circuit. The overcurrent condition causes a disconnect means, like a transistor, to open, thereby disconnecting the cell(s) from the external terminals. The battery protection circuit then latches in this disconnected state until a load is removed from the terminals of the battery pack.
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Citations
18 Claims
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1. A battery protection circuit, comprising:
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a. at least one rechargeable cell;
b. a safety circuit coupled to the at least one rechargeable cell, the safety circuit comprising a means for monitoring a voltage across the at least one rechargeable cell, further comprising a means for monitoring a current flowing through the at least one rechargeable cell;
c. at least one disconnect means coupled serially with the at least one rechargeable cell;
d. a means of monitoring power being delivered either to or from the al least one rechargeable cell; and
e. a means for simulating an overcurrent condition within the safety circuit when the means for monitoring power determines that the power being delivered either to or from the at least one rechargeable cell exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A battery protection circuit having a power monitoring circuit, wherein the power monitoring circuit determines when power exceeds a predetermined threshold, comprising:
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a. at least one rechargeable cell;
b. at least one safety circuit coupled to the at least one rechargeable cell;
c. at least one disconnect means coupled serially with the at least one rechargeable cell; and
d. at least one means for simulating an overcurrent condition within the safety circuit when the power monitoring circuit determines that power exceeds the predetermined threshold. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification