Method of measuring the battery level in a mobile telephone
First Claim
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1. A method of measuring the voltage level of a mobile telephone battery during a charging operation comprising the steps of:
- (a) applying current from a current source to charge the battery;
(b) temporarily causing the current from the current source to cease, to enable the battery to enter a discharge mode;
(c) measuring a voltage level of the battery when in the discharge mode;
(d) re-applying current from the current source; and
(e) repeating steps (b) to (d) until the measured voltage level exceeds one or more pre-determined voltage thresholds,wherein a battery level display on the telephone indicates the charge level of the battery in dependence on which the pre-determined voltage threshold or thresholds has or have been exceeded, andwherein the battery level display indicates a plurality of increasing battery charge levels, wherein each battery charge level corresponds to one of the one or more pre-determined voltage thresholds, wherein steps (a)-(e) are used to determine crossover of each pre-determined voltage threshold of each battery charge level except for a final highest battery charge level, and wherein the method further comprises using a current measurement to determine an end of the battery charging corresponding to the final highest battery charge level.
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Abstract
Measuring the voltage level of a mobile telephone battery during a charging operation involves disabling the charge temporarily so that the battery rapidly enters discharge mode. The discharge mode voltage is more representative of the true battery charge level, so that the present invention can be implemented to provide a battery charge level display that is accurate even when the telephone is being charged.
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Citations
16 Claims
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1. A method of measuring the voltage level of a mobile telephone battery during a charging operation comprising the steps of:
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(a) applying current from a current source to charge the battery; (b) temporarily causing the current from the current source to cease, to enable the battery to enter a discharge mode; (c) measuring a voltage level of the battery when in the discharge mode; (d) re-applying current from the current source; and (e) repeating steps (b) to (d) until the measured voltage level exceeds one or more pre-determined voltage thresholds, wherein a battery level display on the telephone indicates the charge level of the battery in dependence on which the pre-determined voltage threshold or thresholds has or have been exceeded, and wherein the battery level display indicates a plurality of increasing battery charge levels, wherein each battery charge level corresponds to one of the one or more pre-determined voltage thresholds, wherein steps (a)-(e) are used to determine crossover of each pre-determined voltage threshold of each battery charge level except for a final highest battery charge level, and wherein the method further comprises using a current measurement to determine an end of the battery charging corresponding to the final highest battery charge level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of measuring the voltage level of a mobile telephone battery during a charging operation comprising the steps of:
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(a) applying current from a current source to charge the battery; (b) temporarily causing the current from the current source to cease, to enable the battery to enter a discharge mode; (c) measuring a voltage level of the battery when in the discharge mode; (d) re-applying current from the current source; and (e) repeating steps (b) to (d) until the measured voltage level exceeds one or more pre-determined voltage thresholds, wherein steps (a)-(e) are used to determine crossover of each pre-determined voltage threshold of the one or more pre-determined voltage thresholds except for a final highest pre-determined voltage threshold, and wherein the method further comprises using a current measurement to determine an end of the battery charging corresponding to the final highest pre-determined voltage threshold. - View Dependent Claims (14, 15, 16)
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11. A method of measuring the voltage level of a mobile telephone battery during a charging operation comprising the steps of:
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(a) applying current from a current source to charge the battery; (b) temporarily causing the current from the current source to cease, to enable the battery to enter a discharge mode; (c) measuring a voltage level of the battery when in the discharge mode; (d) re-applying current from the current source; and (e) repeating steps (b) to (d) until the measured voltage level exceeds one or more pre-determined voltage thresholds, wherein a battery level display on the telephone indicates the charge level of the battery in dependence on which the pre-determined voltage threshold or thresholds has or have been exceeded, wherein the battery level display indicates four battery charge levels, further comprising only determining crossover of each of the first three battery charge levels wherein after only determining crossover of each of the first three battery charge levels, the method further comprises using a current measurement to determine an end of the battery charging corresponding to the fourth battery charge level. - View Dependent Claims (12, 13)
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Specification