基于数据驱动的电动汽车动力电池SOC预测

doi:10.19562/j.chinasae.qcgc.2021.01.001

Abstract

Abstract:

In order to accurately predict the energy consumption of traction battery in electric vehicle （EV） and alleviate the mileage anxiety of drivers， a data?driven SOC prediction model for the traction battery in EV is proposed in this paper. Firstly， the composition of energy consumption in EVs is analyzed and the influencing factors of energy consumption are extracted. Then based on the vehicle operation data collected by the CAN bus of an EV with machine learning algorithm adopted， an energy consumption model based on temperature stratification is proposed and the macro data and micro data is fused to reduce errors. Finally， the model is used to verify the SOC data provided by on-board BMS. The results show that the model has a good prediction result， providing a scientific decision support for optimizing the energy control strategy of EVs and alleviating driver’s mileage anxiety.

Key words: electric vehicle, SOC prediction, data?driven, machine learning

Jie Hu,Zhiwen Gao. A Data-driven SOC Prediction Scheme for Traction Battery in Electric Vehicles[J].Automotive Engineering, 2021, 43(1): 1-9.

Figures/Tables 21

References 26

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列名	单位	说明
time	YYYYMMDDhhmmss (Y-年,M-月份,D-日期, h-时,m-分,s-秒)	实时数据时间
speed	km/h	实时车速
mileage	km	累计里程
voltage	V	总电压
current	A	总电流
SOC	%	荷电状态
longitude	(°)	经度
latitude	(°)	纬度

里程/km	SOC/%
里程/km	0~20	20~30	…	80~90	90~100
0~20	Xa	Aa	…	Ga	Ha
20~35	Xb	Ab	…	Gb	Hb
…	…	…	…	…	…
65~80	Xe	Ae	…	Ge	He
80以上	Xf	Af	…	Gf	Hf

类型	特征字符	数据类型	说明
车辆状态信息	begin_soc	int	起始SOC值
	average_mileage	float	片段平均累计里程
	slice_time	int	片段运行时间
	slice_mileage	int	片段运行里程
环境信息	slice_temp	float	平均温度
行驶工况信息	jiasu_average_a	float	加速段平均加速度
	jiansu_average_a	float	减速段平均减速度
	max_a	float	最大加速度
	max_v	float	最大速度
	std_v	float	速度标准差
	slice_average_speed	float	平均速度
	jingzhi_ratio	float	静止段比例
	jiasu_ratio	float	加速段比例
	jiansu_ratio	float	减速段比例
	yunsu_ratio	float	匀速段比例
	low_v_ratio	float	低速比例
	mid_low_v_ratio	float	中低速比例
	mid_v_ratio	float	中速比例
	mid_high_v_ratio	float	中高速比例
	high_v_ratio	float	高速比例

类型	特征字符	说明
车辆行驶信息	speed	速度
	mileage	里程
	time_diff	相邻数据时间差
	speed_diff	相邻数据速度差
	mileage_diff	相邻数据里程差
滑动窗口信息	mean_speed	滑动窗口平均速度
	max_speed	滑动窗口最大速度
	min_speed	滑动窗口最小速度
	Sliding_window_mean_a	滑动窗口平均加速度
	Sliding_window _max_a	滑动窗口最大加速度
	Sliding_window _std_a	滑动窗口加速度标准差
	Sliding_window _min_a	滑动窗口最小加速度
	Sliding_window _std_speed	滑动窗口速度标准差

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A Data-driven SOC Prediction Scheme for Traction Battery in Electric Vehicles

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