Temperature compensated lithium battery energy monitor
First Claim
1. A method for monitoring the charge of a battery, comprising the steps of:
- (a) determining first and second temperatures at differing times;
(b) determining first and second temperature compensation factors in accordance with said first and second temperatures respectively wherein said first and second temperature compensation factors differ from each other;
(c) determining first and second charge usages while said battery discharges at said first and second temperatures respectively,(d) compensating said determined first and second charge usages in accordance with said first and second temperature compensation factors respectively; and
,(e) determining cumulative charge usage in accordance with said first and second compensated charge usages, whereby said cumulative charge usage is determined in accordance with differing temperature compensation factors.
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Accused Products
Abstract
A system is provided for temperature compensating and monitoring the energyf a lithium battery. In this method, a temperature compensation factor is determined according to a value of temperature. A determination is made of the energy usage while the battery operates at that temperature. The temperature usage is then compensated in accordance with the temperature compensation factor. A second temperature, along with a second temperature compensation factor, is determined. A second energy level is determined and compensated as described for the first. A cumulative energy usage is determined according to the first and second compensated energy usage values.
35 Citations
10 Claims
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1. A method for monitoring the charge of a battery, comprising the steps of:
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(a) determining first and second temperatures at differing times; (b) determining first and second temperature compensation factors in accordance with said first and second temperatures respectively wherein said first and second temperature compensation factors differ from each other; (c) determining first and second charge usages while said battery discharges at said first and second temperatures respectively, (d) compensating said determined first and second charge usages in accordance with said first and second temperature compensation factors respectively; and
,(e) determining cumulative charge usage in accordance with said first and second compensated charge usages, whereby said cumulative charge usage is determined in accordance with differing temperature compensation factors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification