Adjusting a charging rate of a battery of an information handling system

Patent metadata

Field	Value
Publication number	US-12413086-B2
Application number	US-202217660779-A
Country	US
Kind code	B2
Filing date	Apr 26, 2022
Priority date	Apr 26, 2022
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

Adjusting a charging rate of battery of an information handling system, the method comprising: determining, at a first time, a first accumulation of time over a first time period that i) a state of charge (SOC) of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source; comparing the first accumulation of time with a time threshold; determining, based on the comparing, that the first accumulation of time is greater than the time threshold, and in response: decreasing a charging voltage of the battery from a nominal level to a first decreased level; charging the battery based on the charging voltage having the first decreased level.

First claim

What is claimed is:

1. A computer-implemented method of adjusting a charging rate of battery of an information handling system, the method comprising:
determining, at a first time, a first accumulation of time over a first time period that i) a state of charge (SOC) of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source;
comparing the first accumulation of time with a time threshold;
determining, based on the comparing, that the first accumulation of time is greater than the time threshold, and in response:
decreasing a charging voltage of the battery from a nominal level to a first decreased level;
charging the battery based on the charging voltage having the first decreased level;

determining, at a second time after the first time, a second accumulation of time over a second time period that i) the SOC of the battery indicates that the battery is fully charged and that ii) the battery is connected to the power source;
comparing the second accumulation of time with the time threshold;
determining, based on the comparing, that the second accumulation of time is greater than the time threshold, and in response:
decreasing the charging voltage of the battery from the first decreased level to a second decreased level, the second decreased level less than the first decreased level;
charging the battery based on the charging voltage having the second decreased level;

determining, at a third time after the second time, whether i) the battery is connected to the power source and ii) an amount the battery has been discharged is less than a discharge capacity threshold;
determining, at the third time, that i) the battery is connected to the power source and ii) the amount the battery has been discharged is less than the discharge capacity threshold, and in response;
determining, at a fourth time after the third time, whether i) the battery is disconnected from the power source and ii) the SOC of the battery is less than a battery charge capacity threshold of the battery;
determining, at the fourth time, that i) the battery is disconnected from the power source and ii) the SOC of the battery is less than the battery charge capacity threshold of the battery, and in response:
after the battery is connected to the power source, increasing the charging voltage of the battery from the second decreased level to the nominal level.

2. The computer-implemented method of claim 1 , further comprising:
determining, based on the comparing, that the first accumulation of time is less than the threshold, and in response:
determining, after the first time, a third accumulation of time over a third time period that i) the SOC of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source; and
comparing the third accumulation of time with the time threshold.

3. The computer-implemented method of claim 1 , after decreasing the charging voltage of the battery from the first decreased level to the second decreased level:
determining, at the third time, that i) the battery is disconnected from the power source and that ii) the amount the battery has been discharged is greater than the discharge capacity threshold, and in response:
after the battery is connected to the power source, increasing the charging voltage of the battery from the second decreased level to the first decreased level.

4. The computer-implemented method of claim 1 , further including:
determining, at the fourth time, that i) the battery is connected to the power source, and/or that ii) the SOC of the battery is greater than the battery charge capacity threshold of the battery, and in response:
determining, at fifth time after the fourth time, a third accumulation of time over a third time period that i) the SOC of the battery indicates that the battery is fully charged and that ii) the battery is connected to the power source; and
comparing the third accumulation of time with the time threshold.

5. The computer-implemented method of claim 1 , wherein the second time period overlaps with at least a portion of the first time period.

6. The computer-implemented method of claim 1 , wherein the battery is fully charged when the SOC of the battery is 100%.

7. An information handling system comprising a processor having access to memory media storing instructions executable by the processor to perform operations, comprising:
determining, at a first time, a first accumulation of time over a first time period that i) a state of charge (SOC) of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source;
comparing the first accumulation of time with a time threshold;
determining, based on the comparing, that the first accumulation of time is greater than the time threshold, and in response:
decreasing a charging voltage of the battery from a nominal level to a first decreased level;
charging the battery based on the charging voltage having the first decreased level;

determining, at a second time after the first time, a second accumulation of time over a second time period that i) the SOC of the battery indicates that the battery is fully charged and that ii) the battery is connected to the power source;
comparing the second accumulation of time with the time threshold;
determining, based on the comparing, that the second accumulation of time is greater than the time threshold, and in response:
decreasing the charging voltage of the battery from the first decreased level to a second decreased level, the second decreased level less than the first decreased level;
charging the battery based on the charging voltage having the second decreased level;

determining, at a third time after the second time, whether i) the battery is connected to the power source and ii) an amount the battery has been discharged is less than a discharge capacity threshold;
determining, at the third time, that i) the battery is connected to the power source and ii) the amount the battery has been discharged is less than the discharge capacity threshold, and in response;
determining, at a fourth time after the third time, whether i) the battery is disconnected from the power source and ii) the SOC of the battery is less than a battery charge capacity threshold of the battery;
determining, at the fourth time, that i) the battery is disconnected from the power source and ii) the SOC of the battery is less than the battery charge capacity threshold of the battery, and in response:
after the battery is connected to the power source, increasing the charging voltage of the battery from the second decreased level to the nominal level.

8. The information handling system of claim 7 , the operations further comprising:
determining, based on the comparing, that the first accumulation of time is less than the threshold, and in response:
determining, after the first time, a third accumulation of time over a third time period that i) the SOC of the battery indicates that the battery is fully charged and that ii) the battery is connected to a power source; and
comparing the third accumulation of time with the time threshold.

9. The information handling system of claim 7 , after decreasing the charging voltage of the battery from the first decreased level to the second decreased level, the operations further comprising:
determining, at the third time, that i) the battery is disconnected from the power source and that ii) the amount the battery has been discharged is greater than the discharge capacity threshold, and in response:
after the battery is connected to the power source, increasing the charging voltage of the battery fr

Assignees

• Dell Products Lp

Inventors

• Ning Yan
• Miller Bruce A
• Chang Wen-Yung
• Fang Jui Chin

Classifications

• H02J7/971

  the charge cycle being controlled or terminated in response to non-electric parameters · CPC title

• H02J7/933 Primary

  the cycle being controlled or terminated in response to electric parameters · CPC title

• H02J7/825

  Detection of fully charged condition · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/875

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title