新型串联锂离子电池组主动均衡电路设计

为解决串联锂离子电池组电压均衡问题,提出了一种新型主动电池到电池均衡电路。该电路主要包括N+5个双向开关以及一个LC谐振电路,其中,N表示电池组中电池的数量。利用LC串联谐振电路能够直接将能量从最大充电电池传输至最小充电电池,无需使用多绕组变压器。并且在零电流开关条件下,运行电路中的所有开关能够减少平衡所用功耗。通过10节串联锂离子电池的实际测试,结果显示相比常规均衡电路,提出的电路能够实现快速平衡并且传输效率更高。当均衡功率为0.48 W和2.04W时,实测功率传输效率分别为92.7%和79.2%。

A New Series Li-Ion Batteries Active Balancing Circuit Design

In order to solve the problem of li-Ion batteries voltage balance series,put forward to a new type of battery to battery active equalization circuit. The circuit includes a N+5 switch and a bidirectional LC resonant circuit,N represents a number of battery in series. The use of LC series resonant circuit can direct energy balance from the maximum to the minimum transmission rechargeable battery rechargeable battery,without the use of multi winding transformer. And in the condition of zero current switching,all switches in an operating circuit can reduce the power consumption balance. The actual test through the 10 series cells,the results show that compared with conventional balance circuit,this circuit can realize fast balance and higher transmission efficiency. When the balance of power is 0.48 W and 2.04W,the measured power transmission efficiency were 92.7%and 79.2%.