Abstract: When the traditional car decelerates or brakes, the vehicle motion energy is converted into heat energy through the braking system and released into the atmosphere. And new energy vehicles through braking energy recovery technology into electric energy storage battery, so as to improve the endurance of the vehicle. New energy vehicles in the braking process, to ensure the braking stability and stability, and as much as possible to recover the braking energy, in order to extend the range of new energy vehicles. By studying the definition, composition and working principle of the braking energy recovery system, this paper analyzes the working process of regenerative braking energy recovery of the motor of new energy vehicles and the braking energy recovery system, and clarifies the role of each component of the braking energy recovery system. It focuses on the composition of the Tiguan L PHEV braking system, the hybrid braking principle of the Tiguan L PHEV braking energy recovery system, that is, the support of deceleration request, friction deceleration, regenerative deceleration and the support of the three-phase current drive device are less than four working processes; the Tiguan L PHEV braking energy recovery system is mainly realized by controlling electromechanical brake booster E-BKV and accumulator VX70. The driver's deceleration request is the synthesis of friction deceleration and energy recovery deceleration.

Key words: Decelerate; Brake; Energy recovery; Battery

摘要： 当传统汽车减速或制动时，车辆运动能量通过制动系统而转变为热能释放到大气中。而新 能源汽车通过制动能量回收技术转变为电能储存于蓄电池中，从而提高车辆的续驶能力。新能源 汽车在制动过程中，要保证其制动稳定性和平稳性，同时要尽可能多地回收制动能量，以延长新 能源汽车续驶里程。文章通过对制动能量回收系统的定义、组成及工作原理进行研究，剖析了新 能源汽车电机再生制动能量回收工作过程和制动能量回收系统的制动工作过程，阐明了制动能量 回收系统各部件的作用；重点围绕途观 L PHEV 制动系统组成、途观 L PHEV 制动能量回收系统混 合制动工作原理，即减速请求、摩擦减速、再生减速的支持及三相电流驱动装置的支持不足 4 个 工作过程；系统地介绍了 Tiguan L PHEV 制动能量回收系统主要是通过控制机电式制动助力器 e-BKV 和蓄压器 VX70 实现的，驾驶员的减速请求是摩擦减速与能量回收减速的综合。

关键词: 减速；制动；能量回收；蓄电池