基于PWM波的动力电池放电实验系统  

Experimental system of high-power battery discharge based on PWM wave

作　　者：李圆圆[1] 霍炜[1] 朱智富 张翼[1] 李志明[1] 樊华敏 黄福闯 

机构地区：[1]青岛大学机电工程学院动力集成及储能系统工程技术中心,山东青岛266071 [2]青岛大学物理科学学院,山东青岛266071

出　　处：《储能科学与技术》2017年第6期1333-1339,共7页Energy Storage Science and Technology

基　　金：青岛市战略性新兴产业培育计划(14-8-1-2-gx)

摘　　要：基于PWM(pulse-width modulation,脉冲宽度调制)波和VISA(virtual instrument software architecture,虚拟仪器软件结构)接口设计一套研究电池工况热特性的实验系统,系统可以对电池进行不同工况(如NEDC,new european driving cycle,新欧洲循环驾驶、UDDS,urban dynamometer driving schedule,城市道路循环等)放电实验研究,并可以采集实验过程中的温度信息,采样频率可根据实际需要自定义。文章论述了该系统中PWM波工作原理,根据NEDC工况计算采样精度为0.1s的PWM波数组,用于控制电池按照NEDC工况放电。系统硬件中,DC/DC(direct current to direct current converter,直流到直流变换器)为一种新型的对称结构的电压转换器,可实现双向升降压,方便工况的模拟;PWM波产生器产生NEDC工况控制信号,控制PWM执行器执行操作。并验证系统关键部件的可靠性和精度。最后,对国内主流18650电池进行NEDC实验并获得其放电温度曲线。Based on the PWM（pulse-width modulation） wave and VISA（virtual instrument software architecture） interface,a battery experimental system which is used to study the thermal characteristics of batteries is designed.The system can be used to carry out various discharging experimental in which batteries discharge by different drive cycles,such as NEDC（new european driving cycle）,UDDS（urban dynamometer driving schedule）,etc.,and can collect the temperature information during the experiment,as well as its sampling frequency can be customized according to actual needs.The working principle of the PWM wave in the system is discussed.According to the NEDC,the PWM wave array with sampling accuracy of 0.1s is used to control the discharge of the battery,also verifies the reliability of the system when conduct experiment of thermal characteristics of the single-cell lithium battery with high-rate discharge.There is a new type of symmetrical DC/DC（direct current to direct current converter） which can achieve two-way step-up and down to facilitate the simulation of drive cycles;and a PWM wave generator to produce NEDC condition control signal to control the implementation of the PWM actuator.The reliability and accuracy of critical components of the system is also verified.Finally,NEDC experiments are conducted for the domestic mainstream 18650 batteries and discharge temperature curves are obtained.

关 键 词：PWM 循环工况 锂电池 VISA对象 

分 类 号：TM93[电气工程—电力电子与电力传动] TM4