Method and apparatus for determining a thermal state of a battery taking into account battery aging
First Claim
1. A method for determining a thermal state of a battery used in an electronic system, the battery including one or more cells, the method comprising:
- sensing, within the electronic system, temperature at a position outside the one or more cells of the battery during operation of the electronic system to produce a sensed temperature value, wherein the sensed temperature value is related to a temperature within the one or more cells by way of a temperature offset value that varies with an age of the battery;
determining an aging factor indicative of the age of the battery;
determining the temperature offset value based on the aging factor for the battery; and
adjusting the sensed temperature value based on the temperature offset value to produce an adjusted temperature value representative of the temperature within the one or more cells.
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Accused Products
Abstract
An electronic system, or its battery thermal management system, determines a thermal state of a battery used in the electronic system. A temperature at a position proximate the battery'"'"'s cell is sensed during operation of the electronic system to produce a sensed value. Additionally, a temperature offset value is determined based on an aging factor for the battery. The sensed value is then adjusted based on the offset value to produce an adjusted value representative of the thermal state of the battery. According to one embodiment, a relationship between temperature offset value and battery aging factor is prestored in a memory of the electronic system. In such a case, the offset value may be retrieved from memory periodically or in response to a trigger event based on a determined aging factor. According to another embodiment, the offset value may be computed in real time based on a determined aging factor.
19 Citations
29 Claims
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1. A method for determining a thermal state of a battery used in an electronic system, the battery including one or more cells, the method comprising:
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sensing, within the electronic system, temperature at a position outside the one or more cells of the battery during operation of the electronic system to produce a sensed temperature value, wherein the sensed temperature value is related to a temperature within the one or more cells by way of a temperature offset value that varies with an age of the battery; determining an aging factor indicative of the age of the battery; determining the temperature offset value based on the aging factor for the battery; and adjusting the sensed temperature value based on the temperature offset value to produce an adjusted temperature value representative of the temperature within the one or more cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A thermal management system for use with a battery that supplies electrical power for an electronic system, the thermal management system comprising:
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a temperature sensing circuit positioned outside one or more cells of the battery, the temperature sensing circuit configured to output a value representative of a sensed temperature, wherein the value is related to a temperature within the one or more cells by way of a temperature offset value that varies with an age of the battery; a processor in communication with the temperature sensing circuit; a non-transitory memory having stored thereon operating instructions that are executable by the processor to; determine an aging factor indicative of the age of the battery; determine the temperature offset value based on the aging factor for the battery; and adjust the value representative of the sensed temperature based on the temperature offset value to produce an adjusted temperature value representative of the temperature within the one or more cells. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An electronic system comprising:
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a battery including one or more cells; a temperature sensing circuit positioned outside the one or more cells of the battery, the temperature sensing circuit configured to output a value representative of a sensed temperature, wherein the value is related to a temperature within the one or more cells by way of a temperature offset value that varies with an age of the battery; and a processor in communication with the temperature sensing circuit; a non-transitory memory having stored thereon operating instruction that are executable by the processor to; determine an aging factor indicative of the age of the battery; determine the temperature offset value based on the aging factor for the battery; and adjust the value representative of the sensed temperature based on the temperature offset value to produce an adjusted temperature value representative of the temperature within the one or more cells. - View Dependent Claims (27, 28, 29)
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Specification