Research on Improved Inductance Voltage Sharing Circuit of Series Battery Pack

doi:10.11985/2018.04.003

Abstract

Abstract:

Aiming at the problem that the classical inductive balance circuit can only self-go high low unidirectional equalization voltage between adjacent battery packs, an improved inductance equalization circuit is proposed, which can not only realize bidirectional equalization voltage between adjacent batteries, and by turning the switch on and off, any series between the battery pack energy transfer from high to low can be achieved. Through the circuit analysis, the equilibrium current value is derived. The simulation of the balanced circuit of the series lead-acid battery through Simulink verifies the feasibility of the improved equalization circuit. Compared with the classical inductance equalization circuit, the improvement of the inductance equalization circuit is simple, the equalization efficiency is improved, the circuit loss is reduced , and the balance effect is optimized.

Key words: Balance circuit, power transfer, take the initiative to balance, circuit analysis, effectiveness, loss

CLC Number:

TM912

Yang Jian,Zhang Qiaojie. Research on Improved Inductance Voltage Sharing Circuit of Series Battery Pack[J]. Journal of Electrical Engineering, 2018, 13(4): 18-25.

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开关管	改进电感型均衡电路	经典电感型均衡电路
Q₁	0.75	0.50
Q₂	0.25	0.50
Q₃	0.50	0.50
Q₄	0.25	–
Q₅	0.50	–
Q₆	0.75	–

参数	经典电感型均衡电路	改进电感型均衡电路
充电电压/V	48	48
单体电池电压/V	12	12
频率/kHz	10	10
MOS管内阻/mΩ	25	25
电感/μH	125	125
仿真时间/min	10	10

均衡前电压 /V	改进电感型均衡后电压 /V（3.7min）	经典电感型均衡后电压 /V（10min）
12.09	12	12.02
12.03	12	12.00
11.98	12	11.99
11.92	12	11.98
48.02（总计）	48（总计）	47.98（总计）

均衡前电压 /V	改进电感型均衡后电压 /V（10min）	经典电感型均衡后电压 /V（10min）
12.95	12.95	12.20
12.20	12.79	12.50
25.15（总计）	25.65（总计）	25.45（总计）

改进电感型均衡电路 /Ω（10min）	经典电感型均衡电路 /Ω（10min）
MOS管（2个）0.4×2	MOS管（1个）0.4×1
电感（1个）10×1	电感（2个）10×2
–	电容（1个）0.1×1
–	二极管（1个）26
10.8（总计）	46.5（总计）