摘要
为解决锂电池在低温环境下输出功率降低与放电容量衰减的问题,提出了一种基于三相四桥臂电机系统架构的车载锂电池自加热系统,通过加热电池使其脱离低温状态。在逆变器中引入第四桥臂,并与车载驱动电机三相星型绕组中性点连接,形成三相四桥臂电机系统架构。结合上述电机系统架构,建立电池、电机系统及电池自加热系统等效数学模型。分析电池发热机理及开关频率对电池温升速率的影响,并结合零序电压矢量设计高频电流滞环控制策略。实验结果证明,该系统能够实现锂电池在低温环境下的快速自加热功能,脱离低温状态。
In order to solve the problem of output power reduction and discharge capacity fade of lithium batteries in low temperature environment,a self-heating system for vehicle-mounted lithium batteries based on the three-phase four-leg motor system structure was proposed,which could realize the self-heating of the battery and enable it to get rid of the low-temperature working condition.The fourth leg was introduced into the inverter and connected to the neutral point of the three-phase star winding of the vehicle driving motor to form a three-phase four-leg motor system architecture.An equivalent mathematical model of the battery,motor system and battery self-heating system was established based on the above motor system structure.The mechanism of heat generation in batteries and the effect of switching frequency on battery temperature rise rate were analyzed,the high-frequency hysteresis current control strategy was designed with the zero sequence voltage vector state.The experimental results prove that the system could realize the rapid self-heating function of batteries in low temperature environment and get out of the low temperature state.
作者
陈宇轩
但志敏
柯栋梁
黄孝键
汪凤翔
CHEN Yuxuan;DAN Zhimin;KE Dongliang;HUANG Xiaojian;WANG Fengxiang(College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou 350100,China;Quanzhou Institute of Equipment Manufacturing,Haixi Institutes,Chinese Academy of Sciences,Quanzhou 362216,China;Contemporary Amperex Technology Co.,Ltd.,Ningde 352100,China)
出处
《微特电机》
2024年第3期48-53,59,共7页
Small & Special Electrical Machines
关键词
电动汽车
锂电池自加热
三相四桥臂电机系统架构
滞环控制
electric vehicle
lithium battery self-heating
three-phase four-leg motor system structure
hysteresis control
