• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (14): 160-167.doi: 10.3901/JME.2021.14.160

• 特邀专栏:电源系统设计、管理与大数据 • 上一篇    下一篇

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动力电池组动态均衡时的热安全边界计算与验证

吴舒婕, 王军, 熊瑞, 李幸港   

  1. 北京理工大学电动车辆国家工程实验室 北京 100081
  • 收稿日期:2020-12-27 修回日期:2021-04-06 出版日期:2021-09-15 发布日期:2021-09-15
  • 通讯作者: 熊瑞(通信作者),男,1985年出生,教授,博士研究生导师,IET Fellow。主要研究方向为电动载运工具动力系统和电化学储能系统。E-mail:rxiong@bit.edu.cn
  • 作者简介:吴舒婕,女,1999年出生,硕士研究生。主要研究方向动力电池系统安全管理与控制。E-mail:18811379806@163.com;王军,男,1968年出生,副教授,硕士研究生导师。主要研究方向为车辆动力学。E-mail:wangjunbit@bit.edu.cn;李幸港,男,1994年出生,博士研究生。主要研究方向为新能源汽车动力电池管理。E-mail:lixinggang@bit.edu.cn
  • 基金资助:
    国家自然科学基金优秀青年基金资助项目(51922006)

Calculation and Verification of Thermal Safety Boundary for Dynamic Equalization of Battery Pack

WU Shujie, WANG Jun, XIONG Rui, LI Xinggang   

  1. National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, Beijing 100081
  • Received:2020-12-27 Revised:2021-04-06 Online:2021-09-15 Published:2021-09-15

摘要: 均衡系统是解决动力电池系统不一致性的有效途径,然而电池组均衡电路产热过大也易引发控制器安全问题。针对均衡电路产热引发的热安全问题,以某分布式控制器为研究对象,建立电池管理系统控制器和电路板的热力学模型;通过温度场仿真研究不同动态均衡控制策略下电路板的最高温度以及温度分布;分析开启通道位置对动态均衡电路板温度分布的影响,计算在满足热安全设计条件下的各工况下的最大均衡工作效率及热安全边界,获得一套适用于电池管理系统均衡时的热力学模型建立和热仿真分析的方法。仿真与试验结果表明,任意采样点模型误差小于4℃,可以直观准确模拟动态均衡电路板的温度分布。

关键词: 电池管理系统, 动态均衡, 温度场仿真, 热安全边界

Abstract: The equalization system is an effective way to solve the inconsistency of the battery system. However, excessive heat generation of the battery equalization circuit can easily cause the safety of the controller. Aiming at the thermal safety problem caused by the heat generation of the equalizing circuit, a distributed controller is taken as the research object:A thermodynamic model of the battery management system controller and the circuit board is established. The highest temperature and temperature distribution of the circuit board under different dynamic equilibrium control strategies are studied through temperature field simulation and the influence of the opening channel position on the temperature distribution of the dynamic equilibrium circuit board is analyzed. Calculate the maximum equalization working efficiency and thermal safety boundary under each working condition under the thermal safety design conditions and obtain a set of thermodynamic model establishment and thermal simulation analysis methods that can be applied to the equalization of the battery management system. The simulation and experimental results show that the model error of any sampling point is less than 4℃, which can intuitively and accurately simulate the temperature distribution of the dynamic equalization circuit board.

Key words: battery management system, dynamic equalization, temperature field simulation, thermal safety boundary

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