储能科学与技术 ›› 2023, Vol. 12 ›› Issue (4): 1139-1147.doi: 10.19799/j.cnki.2095-4239.2022.0598

• 储能系统与工程 • 上一篇    下一篇

重卡辅助动力电池加热系统能耗对比及优化

赵立禹1(), 孙桓五1,2(), 刘世闯1, 闫志远1   

  1. 1.太原理工大学机械与运载工程学院
    2.太原理工大学煤炭资源开采利用与装备工程国家级实验教学示范中心,山西 太原 030024
  • 收稿日期:2022-10-17 修回日期:2023-01-08 出版日期:2023-04-05 发布日期:2023-05-08
  • 通讯作者: 孙桓五 E-mail:zly_liyu_zhao@163.com;sunhuanwu@163.com
  • 作者简介:赵立禹(1995—),男,硕士研究生,研究方向为燃料电池重卡动力系统热管理,E-mail:zly_liyu_zhao@163.com
  • 基金资助:
    山西省科技重大专项项目(20181102009)

Energy consumption comparison and optimization of auxiliary power-battery heating system of heavy truck

Liyu ZHAO1(), Huanwu SUN1,2(), Shichuang LIU1, Zhiyuan YAN1   

  1. 1.College of Mechanical and Vehicle Engineering, Taiyuan University of Technology
    2.National Demonstration Center for Experimental Coal Resource and Mining Equipments Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • Received:2022-10-17 Revised:2023-01-08 Online:2023-04-05 Published:2023-05-08
  • Contact: Huanwu SUN E-mail:zly_liyu_zhao@163.com;sunhuanwu@163.com

摘要:

清洁能源的重卡汽车因其零排放、长续航等特性近年来得到了迅速发展,其动力驱动配置多采用燃料电池为主动力电池为辅的形式。低温环境下,重卡辅助动力电池性能衰减不足以承担辅助动力源削峰填谷的重担。因此,加热辅助动力电池使其恢复充电放电性能对重卡汽车应对寒冷环境显得尤为重要。本工作以方形磷酸铁锂电池组为研究对象,通过实验测试单体磷酸铁锂电池-10 ℃、0 ℃、10 ℃、20 ℃的放电工况,得出电池的低温热特性,建立单体电池的热模型并验证其模型有效性。基于该模型提出了一种以石墨烯加热膜为主要热源,整车车载热源余热为辅助热源的加热升温系统。同时,为了降低该加热系统能耗,基于传热原理建立了电池加热系统线性时变模型预测控制器(MPC)。结果表明,重卡在C-WTVC的行驶工况下,电池加热系统通过换热器利用车载热源余热能够提升动力电池组升温速率,使用加热膜和换热器的加热系统比传统PTC加热系统能耗降低了30%。采用MPC控制策略的加热系统比PID控制的加热系统能耗降低了14%。

关键词: 氢燃料电池重卡, 锂离子电池, 低温加热方法, 模型预测控制

Abstract:

In recent years, clean-energy heavy trucks have undergone rapid development because of their zero emission, long endurance, and other suitable characteristics. In addition, their fuel cells serve as their auxiliary power cell. In low-temperature environments, the performance degradation of auxiliary power batteries of heavy trucks is insufficient to bear the role of the auxiliary power source in peak shaving and valley filling. Therefore, to cope with cold environments, heavy trucks should consider heating the auxiliary power battery to recover their charge and discharge performance. In this paper, a square lithium-iron phosphate battery pack was considered as the research object, and the discharge conditions of a single lithium-iron phosphate battery at -10 ℃, 0 ℃, 10 ℃, and 20 ℃ were tested through experiments. The low-temperature thermal characteristics of the battery were obtained; a single-battery thermal model was established, and its effectiveness was verified. Based on this model, a dual-heat source heating system was proposed, in which the graphene heating film was the main heat source and the waste heat of the vehicle-mounted heat source was the auxiliary heat source. A linear time-varying model predictive controller (MPC) was established based on the heat transfer principle to reduce energy consumption of the battery heating system. The results show that, under the driving condition of the China-world transient vehicle cycle, the battery heating system can improve the heating rate of the power battery pack using the waste heat of the vehicle-mounted heat source through the heat exchanger. By using the heating film and heat exchanger, the heating system can increase the energy efficiency by 30% compared with the traditional PTC heating system. The heating system with MPC control strategy has 14% higher energy efficiency than that with the proportional-integral-derivative control.

Key words: hydrogen fuel cell heavy truck, lithium ion battery, low temperature heating method, model predictive control

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