新能源汽车电控模块PCB载流能力分析

Analysis of current carrying capacity of new energy vehicle control module

新能源汽车作为传统燃油汽车的替代者,其"三大电"(电池、电机、电控)的性能直接决定了一款新能源汽车的关键性能。而这其中又属电控与PCB的关系最为密切。随着新能源汽车电控系统集成化趋势的加剧,电控模块对PCB载流能力的要求越来越高。由于电控模块工作环境的特殊性,常规的理论计算已经无法计算其大电流PCB的载流温升。文章通过理论计算、仿真、实测及后期校验,对电控模块PCB的实际载流能力进行了分析,给出了电控模块PCB载流的设计方案。

As a substitute for the traditional fuel vehicles,the performance of the"Three Big Electricity"(battery,motor,control module)directly determines the key performance of a new energy vehicle.Among them,control module is closely related to PCB.With the increasing trend of electronic control system integration of new energy vehicles,the current carrying capacity of PCB is more and more important for control module.Due to the particularity of control module working environment,conventional theoretical calculation has been unable to calculate the current carrying and temperature rise of high current PCB.Through theoretical calculation,simulation,measurement and later verification,this paper analyzes the actual current carrying capacity of the control module PCB,providing a method to calculate the current carrying capacity of control module.