Battery Performance Under high Temperature Exposure
AssigneeDell Products L.P.
InventorsRichard C. Thompson, Wen-Yung Chang
Life of this patent
Estimating the term…
Abstract
A battery system for a portable information handling system may modify charging parameters based on temperature exposure of a battery. When the battery is charged and exposed to a high temperature, the battery may be discharged to a lower voltage. After a cumulative period of exposure to a high temperature, a top-of-charge (TOC) voltage may be permanently reduced for the battery. Prior to charging at a high temperature, the TOC voltage may be reduced for a next charge cycle. Reducing the TOC voltage may minimize adverse effects for battery performance.
Claims20
A method for charging a battery, comprising:
- when the battery is charged and the battery temperature is greater than a first temperature threshold, discharging the battery to a first voltage threshold, wherein the first voltage threshold is less than a top-of-charge voltage of the battery;
- and
- when the battery temperature is greater than a second temperature threshold for a first duration, permanently reducing the top-of-charge voltage to a second voltage threshold, wherein the second voltage threshold is less than the maximum charge voltage of the battery.
A battery system comprising:
- a battery;
- and
- a battery management unit comprising a processor and memory media, the memory media storing instructions executable by the processor to:
- when the battery is charged and the battery temperature is greater than a first temperature threshold, discharging the battery to a first voltage threshold, wherein the first voltage threshold is less than a top-of-charge voltage of the battery;
- and
- when the battery temperature is greater than a second temperature threshold for a first duration, permanently reducing the top-of-charge voltage to a second voltage threshold, wherein the second voltage threshold is less than the maximum charge voltage of the battery.
An information handling system, comprising:
- a battery system, the battery system comprising:
- a battery;
- and
- a battery management unit comprising a processor and memory media, the memory media storing instructions executable by the processor to:
- when the battery is charged and the battery temperature is greater than a first temperature threshold, discharging the battery to a first voltage threshold, wherein the first voltage threshold is less than a top-of-charge voltage of the battery;
- and
- when the battery temperature is greater than a second temperature threshold for a first duration, permanently reducing the top-of-charge voltage to a second voltage threshold, wherein the second voltage threshold is less than the maximum charge voltage of the battery.
Dependencies are inferred from the claim text.