Method for improving the endurance of a traction battery and battery management system

By establishing a multi-dimensional calibration reference table and a bootstrap boost module, the problem of reduced overall vehicle efficiency in electric two-wheelers caused by the low-voltage zone of sodium-ion batteries was solved, enabling normal operation and extended driving range in the low-voltage zone.

CN120462218BActive Publication Date: 2026-07-21WUXI LINGBO ELECTRONICS TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUXI LINGBO ELECTRONICS TECH CO LTD
Filing Date
2025-06-27
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

When sodium-ion batteries discharge in the low-voltage range, some electrical components inside the electric two-wheeler cannot function properly, resulting in reduced overall vehicle efficiency and shortened driving range.

Method used

A multi-dimensional calibration reference table is established, and the target boost voltage is determined based on the power battery output voltage, the target motor speed, and the target motor torque. The power battery output voltage is boosted through a bootstrap boost module so that the load system operates at its maximum efficiency point.

Benefits of technology

When the sodium-ion battery is discharged in the low-voltage region, it ensures that the electrical components inside the electric two-wheeler work normally, improves the overall vehicle efficiency, and extends the driving range.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a method for improving the cruising range of a power battery and a battery management system, and relates to the technical field of battery control. The method for improving the cruising range of the power battery comprises the following steps: establishing a multi-dimensional calibration reference table, wherein the multi-dimensional calibration reference table is used to represent the corresponding relationship between input parameters and a target boost voltage V boost ; acquiring a current input parameter; when the output voltage V bat of the power battery is less than a minimum working voltage V min and not less than an under-voltage V uv , determining the target boost voltage V boost according to the current input parameter by querying the multi-dimensional calibration reference table; boosting the output voltage V boost of the power battery according to the target boost voltage V bat , and using the boosted voltage as a power supply voltage to supply power to a load system; and within a boost range, the power supply voltage obtained by boosting according to the target boost voltage V boost makes the load system work at a maximum efficiency point under the current input parameter. The method can effectively improve the cruising range of the power battery.
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