超级电容电池在锂离子动力电池系统中的应用

Application of Super Capacitor Battery in Lithium-ion Power Battery System

介绍了一种以锂离子电池、超级电容电池以及电压控制装置为主体的混合能源系统。其中,锂离子电池为车辆主要动力源,超级电容电池为车辆辅助动力源,电压控制装置对母线电压进行控制。在低温环境下,电压控制装置控制锂离子电池与超级电容电池相互充电,从而让锂离子电池通过其内阻产生自发热,实现内部升温。该混合能源系统的优势在于,利用锂离子内阻自发热来减少传统PTC加热器等外部加热方式的热损失,能耗更低。同时,在车辆需求瞬间大功率充放电时,利用超级电容电池优异的功率特性对锂离子电池充放电功率进行“削峰填谷”以降低其在大功率充放电时的损耗。

A hybrid energy system was introduced,which was mainly composed of lithium-ion battery,super capacitor battery and voltage control unit.Among them,lithium-ion battery was the main power source of the vehicle,super capacitor battery was the auxiliary power source of the vehicle,and the voltage control device controlled the bus voltage.In the low temperature environment,the voltage control device controlled the lithium-ion battery and the super capacitor battery to charge each other,so that the lithium-ion battery could generate self-heating through its internal resistance to achieve internal temperature rise.The advantage of the system is that it can reduce the heat loss of traditional PTC heater and other external heating methods by using lithium ion internal resistance self-heating,so the energy consumption is lower.At the same time,when the vehicle needs instant high-power charging and discharging,the excellent power characteristics of the super capacitor battery are used to“cut the peak and fill the valley”of the charging and discharging power of the lithium-ion battery,so as to reduce the loss of the high-power charging and discharging.