Battery thermal management method and system for a vehicle

By analyzing user driving data and driving habits through big data, the battery thermal management strategy was optimized, solving the problem of insufficient battery performance in low-temperature environments. This enabled efficient heating and energy optimization of the battery in low-temperature environments, improving the overall vehicle range and driving experience.

CN117621932BActive Publication Date: 2026-06-09NIO TECH ANHUI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NIO TECH ANHUI CO LTD
Filing Date
2022-08-19
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

At low temperatures, the electrochemical performance of lithium-ion batteries is negatively affected, and existing thermal management strategies have failed to effectively optimize battery temperature to meet user power requirements and reduce energy consumption.

Method used

By mining user driving data through big data, analyzing driving habits and expected trips, and calculating target temperatures to optimize battery heating strategies, the system determines whether and how to heat the battery based on energy gains, ensuring that the battery provides maximum power and reduces energy consumption in low-temperature environments.

Benefits of technology

It achieves efficient battery heating in low-temperature environments, meeting user power requirements, reducing energy consumption, and improving vehicle range and driving experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a battery thermal management method and system for a vehicle, the method comprising: obtaining an expected trip based on historical driving data of the vehicle; obtaining a current temperature; determining a current temperature loss energy E1 consumed on the internal resistance of the battery to complete the expected trip at the current temperature; determining a target temperature based on the current temperature and a temperature step, wherein the target temperature is a sum of the current temperature and a positive integer multiple of the temperature step; determining a target temperature loss energy E2 consumed on the internal resistance of the battery to complete the expected trip at the target temperature; calculating a heating energy E heat consumed to heat the battery from the current temperature to the target temperature based on the current temperature loss energy E1, the target temperature loss energy E2 and the heating energy E heat ; calculating an energy benefit E benefit of heating the battery to the target temperature; and determining whether the battery needs to be heated based on at least the energy benefit E benefit . The application determines the most suitable target temperature for the battery from the perspective of energy benefit.
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