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Google patents battery charging that adapts to temperature limits

Patent drawing
Patent drawing from the official filing.

This filing describes a method for electronic devices to adjust how they charge batteries when the temperature is outside the standard safe range. Instead of stopping the charge, the system switches to a slower charging profile with lower voltage or current to keep the battery safe. This allows older hardware to support newer batteries that can handle different temperatures.

Why it mattersIt offers a low-cost way to extend battery life and safety by adapting charging speed to real-world temperatures without needing new hardware.

In the filing’s own words

The present document describes techniques associated with temperature-based battery-charging-profile architectures and applications thereof. Although advances in battery chemistries may enable batteries to be charged at temperatures that are higher or lower than the limits of conventional-battery chemistries (e.g., 0 °C to 60 °C), conventional hardware is generally restricted (e.g., hardcoded) to those limits. However, the temperature-based battery-charging-profile architectures and applications thereof, as described herein, provide a low-cost solution for conventional battery-charging hardware to be able to charge batteries with battery chemistries having expanded charging limits. The techniques described herein enable charging of batteries at temperatures that are outside of the standard JEITA mask by utilizing a switching mechanism operated by a controller that switches, based on the battery temperature, to a different charge profile with a reduced charge rate at a reduced voltage and/or current without affecting the JEITA mask.

What exactly they claim (claim 1)

1. A method for implementing temperature-based battery-charging-profile architectures and applications, the method comprising: detecting a battery temperature of a battery of an electronic device; determining that the battery temperature exceeds a temperature boundary defined by a standard charge profile; selecting, from a plurality of temperature zones defining non-overlapping ranges of temperatures, a temperature zone corresponding to the battery temperature, switching to a first charge profile corresponding to the selected temperature zone, the first charge profile defining a reduced charge rate at a reduced voltage or a reduced current relative to the standard charge profile; and causing the battery to be charged according to the first charge profile.

Facts

Company
Google (Google LLC)
Official title
Temperature-Based Battery-Charging-Profile Architectures and Applications Thereof
Publication number
US20260331942A1
Application number
18997156
Filed
Jun 30, 2023
Published
Oct 22, 2026
Inventors
3
Claims
20

Classified under

H02J 7/977 Electricity & electronicsH01M 10/443 Electricity & electronicsH01M 10/46 Electricity & electronicsH02J 7/80 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.