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Automotive Engineering ›› 2025, Vol. 47 ›› Issue (7): 1305-1316.doi: 10.19562/j.chinasae.qcgc.2025.07.008

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Energy Management Strategy Based on Plug-In Fuel Cell Buses

Jing Lian,Peng Yang,Linhui Li(),Yafu Zhou,Xuesong Sun   

  1. School of Mechanical Engineering,Dalian University of Technology,Dalian 116024
  • Received:2025-01-17 Revised:2025-03-02 Online:2025-07-25 Published:2025-07-18
  • Contact: Linhui Li E-mail:lilinhui@dlut.edu.cn

Abstract:

For the problem that Pontryagin's Minimum Principle (PMP) is only applicable to offline calculation and difficult to be applied in real vehicles, an energy management strategy for online identification of working conditions based on density clustering (DBSCAN) is proposed. This strategy combines offline training with online control, and makes full use of the fixed and fragmentary characteristics of bus routes, using the bus stops as nodes to divide the routes into multiple driving segments. During the vehicle's stop, the motor output power of the previous driving segment is identified to calculate the co-state of the next driving segment. When the vehicle starts running, the calculated co-state is applied to the PMP algorithm to complete the real-time power distribution. Finally, by constructing the simulation experiment based on real vehicle data, the proposed strategy is transplanted into the vehicle controller. The results show that compared with the current regular energy management strategy for real vehicle operation, the proposed strategy can reduce the equivalent hydrogen consumption by 17.6% and effectively maintain the state of charge (SOC) of the power battery. Moreover, each calculation step is within 60 ms, which has good real-time performance and can meet the application requirements of energy management strategies in the actual operation of fuel cell buses.

Key words: energy management, condition identification, density clustering, Pontryagin’s maximum principle, hardware in loop