Cold Weather Smart Battery Heating and Charging Strategy Utilizing Multi-Stage Battery Heating Control

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 31st, 2026

Detected March 31st, 2026

Summary

The USPTO granted Hyundai Motor Company Patent US12592426B2 for a multi-stage battery heating control system designed for electric vehicles operating in cold weather conditions. The system uses ambient temperature thresholds (−5°C, 5°C, and 10°C) to activate three levels of battery heating functions. This 20-claim patent (Application No. 18076947) was filed on December 7, 2022.

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What changed

USPTO granted Hyundai Motor Company Patent US12592426B2 for a multi-stage battery heating control system for electric vehicles. The system employs conditional logic based on ambient battery temperature to activate three heating levels: Level 1 for temperatures below −5°C, Level 2 for temperatures between −5°C and 5°C, and Level 3 for temperatures between 5°C and 10°C. The patent covers methods for preheating EV battery systems using estimated vehicle start times and temperature thresholds.

Patent grants do not impose regulatory compliance obligations on other entities. Hyundai and its licensees may use the patented technology without regulatory action required. Other manufacturers developing similar cold-weather battery heating systems should review this patent to ensure their products do not infringe Hyundai's claims or to explore licensing arrangements.

Source document (simplified)

← USPTO Patent Grants

Cold weather smart battery heating and charging strategy utilizing multi-stage battery heating control

Grant US12592426B2 Kind: B2 Mar 31, 2026

Assignee

Hyundai Motor Company

Inventors

Kevin Lee

Abstract

Systems and methods for preheating a battery heater of an electric vehicle (EV) are provided. The method may comprise determining an estimated vehicle start time for the EV, determining whether an ambient temperature of a battery is less than −5° C., when the ambient temperature of the battery is less than −5° C., performing a level 1 heating function, when the ambient temperature of the battery is not less than −5° C., determining whether the ambient temperature of the battery is between −5° C. and 5° C., when the ambient temperature of the battery is between −5° C. and 5° C., performing a level 2 heating function, when the ambient temperature of the battery is above −5° C. and not between −5° C. and 5° C., then, determining whether the ambient temperature of the battery is between 5° C. and 10° C., and when the ambient temperature of the battery is between 5° C. and 10° C., performing a level 3 heating function.