DT/Dt detector for cell pack charge determination
First Claim
1. A method for detecting when a cell pack reaches a full charge comprising the steps of:
- sensing an actual temperature of the cell pack;
storing an initial actual temperature of the cell pack as a reference temperature;
determining, during subsequent sampling events, when said actual temperature exceeds said reference temperature;
storing in a rollover memory a first value for each sample event when said actual temperature exceeds the reference temperature, and a second value when the actual temperature does not exceed said reference temperature;
summing the occurrences of said first values for a series of consecutive sampling events to derive a total and determining from said total that the cell pack has reached a full charge.
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Accused Products
Abstract
A technique for detecting when a full charge for a cell pack is reached based upon sensing an actual temperature of the cell pack. The initial actual temperature is the first value stored as a reference temperature. During subsequent sampling events, the actual temperature is stored as the reference temperature when the actual temperature exceeds said reference temperature. A first value for each sample event is stored in a rollover memory when said actual temperature exceeds the reference temperature, and a second value is stored in the rollover memory when the actual temperature does not exceed the reference temperature. The occurrences of the first values is summed for a series of consecutive sampling events to derive a total. The total is compared to a predetermined limit, and if the total is greater, then charging of the cell pack will be discontinued.
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Citations
4 Claims
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1. A method for detecting when a cell pack reaches a full charge comprising the steps of:
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sensing an actual temperature of the cell pack; storing an initial actual temperature of the cell pack as a reference temperature; determining, during subsequent sampling events, when said actual temperature exceeds said reference temperature; storing in a rollover memory a first value for each sample event when said actual temperature exceeds the reference temperature, and a second value when the actual temperature does not exceed said reference temperature; summing the occurrences of said first values for a series of consecutive sampling events to derive a total and determining from said total that the cell pack has reached a full charge. - View Dependent Claims (2, 3, 4)
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Specification