Hybrid power locomotive and power battery pack capacity balance control method and system

By implementing the power battery pack capacity equalization control method in the dynamic and static standby stage in hybrid locomotives, the problem of unbalanced power battery pack capacity is solved, and the capacity equalization of power battery pack and the stability of locomotive use is improved.

CN119459778AActive Publication Date: 2025-02-18ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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Patent Information

Application Number
CN202411573951.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-02-18
Estimated Expiration
2044-11-06

AI Technical Summary

Technical Problem

In the traditional power battery design method, the capacity of multiple power battery packs is uneven, resulting in the locomotive that may lose one power in the case of long wheel stopping time, affecting the use effect.

Method used

Through the capacity equalization control method of the dynamic traction stage and the static standby stage, the capacity difference and required traction force of each power battery pack are obtained and distributed, so that the traction converter provides appropriate traction force to achieve capacity equalization of the power battery pack.

Benefits of technology

The dynamic balance of the capacity of the power battery pack is achieved, avoiding the impact of power losses on the use of the locomotive, and improving the reliability of the control system.

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Abstract

The invention discloses a hybrid power locomotive and a power battery pack capacity balance control method and system.The control method comprises the steps that in the dynamic traction stage, the capacity difference between a first power battery pack and a second power battery pack and the required traction force are obtained; and distributing the required traction force according to the capacity difference, so that the first traction converter and the second traction converter respectively provide the distributed traction force, and the capacity balance control of the first power battery pack and the second power battery pack is realized. On the basis that a hardware circuit is kept unchanged, the two traction converters are controlled, so that the power battery pack in a higher charge state provides larger traction energy for the whole vehicle, the capacity dynamic balance of the two power battery packs is realized, and the great influence of power loss on the use of the locomotive is avoided.
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Citation Information

Patent Citations

  • Locomotive traction storage battery discharge balancing circuit and control method

    CN112193123A

  • Vehicle driving control method and device and vehicle

    CN112572161A

  • Multi-group power battery hybrid power supply control logic method suitable for hybrid power locomotive

    CN115742863A

  • Method for balancing electric quantity of vehicle battery, electronic equipment and vehicle

    CN116001646A

  • Traction converter, power battery pack capacity equalization circuit and control method

    CN117944464A