Method and device for correcting charge state display, battery management system and medium

By obtaining battery performance indicators and temperature rise rate model, correcting the charge state and using follow-up rate characterization, the problem of rapid change rate of the charge state under low temperature conditions is solved, and the smooth display of the charge state is achieved, which alleviates the early stage of the user Mileage anxiety.

CN119291519AActive Publication Date: 2025-01-10CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
View PDF 8 Cites 0 Cited by

Patent Information

Application Number
CN202411811266.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-01-10
Estimated Expiration
2044-12-10

AI Technical Summary

Technical Problem

The battery discharge depth interval is reduced under low temperature conditions, resulting in the change rate of the charge state display being fast first and then slower, causing users to worry about mileage in the early stage of driving.

Method used

By obtaining the performance indicators of the battery, such as temperature value, discharge depth interval, equivalent power and average voltage, the temperature value at the end of the discharge is estimated, and the state of charge is corrected according to the initial state of charge and temperature rise rate model, and follow the charge Rate characterization slows down state of charge changes, ensuring that the state of charge displayed to the user is slow to change.

Benefits of technology

It solves the user's early mileage anxiety problem. By correcting the charge state display, it ensures that the charge state shows smooth and uniform changes during the discharge process, improving the accuracy and user experience of the charge state display.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119291519A_ABST
    Figure CN119291519A_ABST
Patent Text Reader

Abstract

The invention discloses a method and device for correcting charge state display, a battery management system and a medium, and the method comprises the steps: obtaining a current temperature value of a battery, a discharge depth interval corresponding to the current temperature value, equivalent power and average voltage when the battery is in a discharge state; obtaining a first charge state based on the current discharge duration, the discharge current and the initial charge state, and estimating a first temperature value at the end of discharge in combination with the lower limit of the discharge depth interval, the discharge current, the current temperature value and a temperature rise rate model; obtaining a corrected charge state based on the current discharge duration, the discharge current, the initial charge state and the lower limit of a first discharge depth interval corresponding to the first temperature value; the difference value between the first charge state and the corrected charge state is larger than a first threshold value, the first charge state is followed in a slowed-down mode at a first following speed, the charge state is displayed, and the first threshold value is non-zero.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Battery SOC correction method and device, and computer readable storage medium

    CN113820605A

  • Real-time intelligent detection method and device for residual electric quantity of battery, electronic equipment and medium

    CN114594381A

  • Battery electric quantity calculation method and device, terminal and storage medium

    CN115656845A

  • Correction method and device for representing residual electric quantity of vehicle power battery and vehicle

    CN116068416A

  • Battery state-of-charge calculation method and device, electronic equipment and storage medium

    CN118011217A