Lithium-ion battery data set

Data Description:A set of four Li-ion batteries (# 5, 6, 7 and 18) were run through 3 different operational profiles (charge, discharge and impedance) at room temperature. Charging was carried out in a constant current (CC) mode at 1.5A until the battery voltage reached 4.2V and then continued in a constant voltage (CV) mode until the charge current dropped to 20mA. Discharge was carried out at a constant current (CC) level of 2A until the battery voltage fell to 2.7V, 2.5V, 2.2V and 2.5V for batteries 5 6 7 and 18 respectively. Impedance measurement was carried out through an electrochemical impedance spectroscopy (EIS) frequency sweep from 0.1Hz to 5kHz. Repeated charge and discharge cycles result in accelerated aging of the batteries while impedance measurements provide insight into the internal battery parameters that change as aging progresses. The experiments were stopped when the batteries reached end-of-life (EOL) criteria, which was a 30% fade in rated capacity (from 2Ahr to 1.4Ahr). This dataset can be used for the prediction of both remaining charge (for a given discharge cycle) and remaining useful life (RUL). Files:B0005.matData for Battery #5B0006.matData for Battery #6B0007.matData for Battery #7B0018.matData for Battery #18 Data Structure:cycle:top level structure array containing the charge, discharge and impedance operationstype: operation type, can be charge, discharge or impedanceambient_temperature:ambient temperature (degree C)time: the date and time of the start of the cycle, in MATLAB date vector formatdata:data structure containing the measurements for charge the fields are:Voltage_measured: Battery terminal voltage (Volts)Current_measured:Battery output current (Amps)Temperature_measured: Battery temperature (degree C)Current_charge:Current measured at charger (Amps)Voltage_charge:Voltage measured at charger (Volts)Time:Time vector for the cycle (secs) for discharge the fields are:Voltage_measured: Battery terminal voltage (Volts)Current_measured:Battery output current (Amps)Temperature_measured: Battery temperature (degree C)Current_charge:Current measured at load (Amps)Voltage_charge:Voltage measured at load (Volts)Time:Time vector for the cycle (secs)Capacity:Battery capacity (Ahr) for discharge till 2.7V for impedance the fields are:Sense_current:Current in sense branch (Amps)Battery_current:Current in battery branch (Amps)Current_ratio:Ratio of the above currents Battery_impedance:Battery impedance (Ohms) computed from raw dataRectified_impedance:Calibrated and smoothed battery impedance (Ohms) Re:Estimated electrolyte resistance (Ohms)Rct:Estimated charge transfer resistance (Ohms)

数据集描述：本数据集包含四组锂离子电池（编号为5、6、7和18）在室温条件下历经三种操作模式（充电、放电和阻抗）的测试。充电过程以恒定电流（CC）模式进行，电流为1.5A，直至电池电压升至4.2V，随后切换至恒压（CV）模式，直至充电电流降至20mA。放电过程以恒定电流（CC）模式进行，电流为2A，直至电池电压分别降至2.7V、2.5V、2.2V和2.5V，对应电池编号5、6、7和18。阻抗测量通过电化学阻抗谱（EIS）频率扫描从0.1Hz至5kHz完成。重复的充放电循环加速了电池的老化过程，而阻抗测量则揭示了电池内部参数随老化进程的变化。实验在电池达到寿命终结（EOL）标准时终止，即额定容量衰减30%（从2Ah降至1.4Ah）。本数据集可用于预测电池在特定放电周期内的剩余电量以及剩余使用寿命（RUL）。文件：B0005.mat——电池编号5的数据；B0006.mat——电池编号6的数据；B0007.mat——电池编号7的数据；B0018.mat——电池编号18的数据。数据结构：
cycle——包含充电、放电和阻抗操作的顶层结构数组；
type——操作类型，可为充电、放电或阻抗；
ambient_temperature——环境温度（摄氏度）；
time——周期开始日期和时间的记录，采用MATLAB日期向量格式；
data——包含测量数据的结构，充电时的字段包括：
Voltage_measured——电池端电压（伏特）；
Current_measured——电池输出电流（安培）；
Temperature_measured——电池温度（摄氏度）；
Current_charge——充电器测量的电流（安培）；
Voltage_charge——充电器测量的电压（伏特）；
Time——周期的时序向量（秒）；放电时的字段包括：
Voltage_measured——电池端电压（伏特）；
Current_measured——电池输出电流（安培）；
Temperature_measured——电池温度（摄氏度）；
Current_charge——负载测量的电流（安培）；
Voltage_charge——负载测量的电压（伏特）；
Time——周期的时序向量（秒）；
Capacity——放电至2.7V时的电池容量（安时）；阻抗时的字段包括：
Sense_current——感测支路的电流（安培）；
Battery_current——电池支路的电流（安培）；
Current_ratio——上述电流的比率；
Battery_impedance——由原始数据计算得到的电池阻抗（欧姆）；
Rectified_impedance——校准并平滑后的电池阻抗（欧姆）；
Re——估计的电解液电阻（欧姆）；
Rct——估计的电荷转移电阻（欧姆）。

搜集汇总

背景与挑战

背景概述

该数据集包含四个锂离子电池在不同操作模式下的实验数据，记录了电压、电流、温度等参数，适用于预测剩余电荷和剩余使用寿命（RUL）。