怠速充电工况下的电池SOC平衡控制

doi:10.19562/j.chinasae.qcgc.2021.03.012

Abstract

Abstract:

On the basis of an analysis on the battery energy stability control requirements of single motor and dual motor hybrid electric vehicles under engine idle charging condition， an active control strategy for battery SOC balance under idle charging condition is proposed， with the calculation formula for the energy control target value corresponding to each control phase is given and analyzed. Simulation and real vehicle test are conducted on the battery SOC balance control strategy under idle charging condition with a result showing that the proposed control strategy can effectively control the SOC balance of battery， and the control stability of battery active energy overcharging and over?discharging in idle charging condition is also improved.

Key words: HEV, SOC balance, battery energy stability, idle charging

Chongxiang Mo,Jian Wu,Hongzhong Qi. Battery SOC Balance Control Under Idle Charging Condition[J].Automotive Engineering, 2021, 43(3): 387-396.

Figures/Tables 10

参数	符号	单位	定义值
发动机转速响应	I_EJK	r/(min·s)	2 000
电池端等效电阻	$R C B$	Ω	0.1
负载端等效电阻	$R C C$	Ω	0.05
电池可用能量	E_W	kW·h	7.5
涓流充电能量梯度	ΔE_W	kW·h	0.003 75
平衡控制能量梯度	ΔE_W	kW·h	0.003
充电控制电池电压	U_CB	V	388
用电附件功率	P_附件	kW	-0.3
电池最大过充电流	$I c h a r g M a x$	A	-0.3
电池最大过放电流	$I d i s c h r g M a x$	A	0.5
发电能量转换效率	$η m$		0.5
循环电池过放系数	γ		0.023
转速波动角速度	Δω	rad/s	2.09
发动机摩擦转矩	T_e0	N·m	10
等效转动惯量	J_SER	kg·m²	0.17

References 5

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循环次数	过放时间/s	过充时间/s
1	10.80	41.10
2	11.80	46.10
3	11.10	38.00
4	10.30	44.80
5	11.08	34.65
6	9.07	33.01
7	11.08	32.75
8	10.08	34.77
9	10.20	35.02
10	11.08	41.07
11	10.83	33.76
12	11.45	35.78
13	9.83	32.00
14	9.32	33.76
15	10.95	45.35

控制阶段	控制时间	仿真控制值
涓流充电	t_A	100
过放充电	t_B	9.5
过放充电	t_C	0.5
过充充电	t_D	6
过充充电	t_E	34

参数	单位	定义
EMS_AccPedal	%	车辆油门
BMS_BattSOC	%	电池SOC值
EMS_HybridSOC	%	混合动力SOC值
C_BMS_BattCurrent	A	电池的真实电流
MCU_MotActCurrent	A	K0离合器转速
C_BattChrgEnergy	kW·h	充放能量积分
C_ChrgDisChrgPwr	kW	充放电等效功率
C_BMS_Pwr	kW	电池功率（取反）
C_MCU_Pwr	kW	电机的电功率
EMS_EngTorq	N·m	发动机转矩
MCU_MotActTorque	N·m	电机机械转矩
EMS_EngSpd	r/min	发动机转速
MCU_MotActSpd	r/min	电机转速

Battery SOC Balance Control Under Idle Charging Condition

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