Method and system for controlling charging parameters of a battery using a plurality of temperature ranges and counters and parameter sets
First Claim
1. A method of controlling charging parameters of a battery comprising:
- providing a first charging parameter set and a second charging parameter set;
determining whether the battery is being charged;
sensing a battery temperature;
comparing the sensed battery temperature to a first temperature range;
incrementing a first count when the sensed battery temperature falls within the first temperature range and incrementing a second count when the sensed battery temperature falls outside the first temperature range;
comparing the first and second count to a reference count;
resetting the first count when the second count is greater than the reference count and resetting the second count when the first count is greater than the reference count; and
selecting the first charging parameter set when the first count is greater than the reference count and selecting the second charging parameter set when the second count is greater than the reference count.
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Abstract
A method of charging a battery and a battery pack utilizing the same, is disclosed. The method enhances the battery life characteristic of a battery cell by varying the charging parameters (e.g., charging voltage, charging current, rate of charge, relative state of charge, and battery capacity) based a temperature of or around the battery cell is in a normal, extended, or abnormal temperature range when the battery cell is fully charged. The charging method includes determining whether a battery cell is being charged, and if the battery cell is being charged, determining whether the battery cell is fully charged; if the battery cell is fully charged, determining whether a temperature of or around the battery cell is in a normal range or in an extended range; and if the temperature is in the normal range, selecting a first charging parameter set, and if the temperature is in the extended range, selecting a charging condition of the battery cell as a second set value.
72 Citations
11 Claims
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1. A method of controlling charging parameters of a battery comprising:
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providing a first charging parameter set and a second charging parameter set; determining whether the battery is being charged; sensing a battery temperature; comparing the sensed battery temperature to a first temperature range; incrementing a first count when the sensed battery temperature falls within the first temperature range and incrementing a second count when the sensed battery temperature falls outside the first temperature range; comparing the first and second count to a reference count; resetting the first count when the second count is greater than the reference count and resetting the second count when the first count is greater than the reference count; and selecting the first charging parameter set when the first count is greater than the reference count and selecting the second charging parameter set when the second count is greater than the reference count. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery charging system comprising:
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a battery; a battery charger configured to charge the battery; a temperature sensor configured to sense a temperature of the battery; a microcontroller, wherein the microcontroller is configured to; communicate with the battery charger and the temperature sensor; determine whether the battery is being charged; receive a sensed battery temperature; compare the sensed battery temperature to a first temperature range; provide a first and second count; increment the first count when the sensed battery temperature falls within the first temperature range and increment a second count when the sensed battery temperature falls outside the first predetermined temperature range; compare the first and second charging frequency to the charging reference frequency; resetting the first count when the second count is greater than the reference count and resetting the second count when the first count is greater than the reference count; and select the first charging parameter set when the first charging number is greater than the charging reference number and select the second charging parameter set when the second charging frequency is greater than the charging refereance frequency. - View Dependent Claims (11)
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Specification