BATTERY OVERTEMPERATURE CONTROL SYSTEM AND METHOD
First Claim
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1. A method of controlling battery temperature during a charging operation, the method comprising the steps of;
- calculating a battery temperature;
determining a battery reference temperature, wherein the step of determining the battery reference temperature includes setting the battery reference temperature to the lower of a prior battery reference temperature or the calculated battery temperature;
comparing the calculated battery temperature to a battery temperature threshold, wherein the battery temperature threshold is based upon the battery reference temperature; and
controlling a battery charger in response to the comparison of the measured battery temperature to the battery temperature threshold.
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Abstract
A control system and method for a battery charger. The system includes a processor that receives inputs from a battery current sensor and temperature sensors within the batteries. The processor terminates and resumes charging in response to measured battery temperatures compared to stored reference values in order to prevent high temperatures associated with damage to the batteries.
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Citations
21 Claims
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1. A method of controlling battery temperature during a charging operation, the method comprising the steps of;
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calculating a battery temperature;
determining a battery reference temperature, wherein the step of determining the battery reference temperature includes setting the battery reference temperature to the lower of a prior battery reference temperature or the calculated battery temperature;
comparing the calculated battery temperature to a battery temperature threshold, wherein the battery temperature threshold is based upon the battery reference temperature; and
controlling a battery charger in response to the comparison of the measured battery temperature to the battery temperature threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A control system for a battery charger comprising:
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a temperature sensor for measuring a battery temperature; and
a processor including a memory, the processor configured to determine a battery reference temperature by determining the lower of a prior battery temperature stored in the memory and the measured battery temperature the processor then comparing the measured battery temperature to a battery temperature threshold based on the battery reference temperature determined by the processor, the processor storing the lower of the measured battery temperature and the prior battery temperature in the memory, and wherein the processor is further configured to terminate a charging cycle in response to the comparison of the measured battery temperature and the battery temperature threshold, wherein the processor is further configured to periodically reset the battery overtemperature threshold. - View Dependent Claims (18, 19, 20, 21)
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Specification