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datou_nono银虫 (小有名气)
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[求助]
NASA battery capacity data set 分析
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有没有使用过NASA battery capacity data set的啊，如下给出Li-ion batteries (# 5, 6, 7 and 18)的数据及测试条件。对于这样的mat文件，怎么得到横轴为充放电次数，纵轴为电池容量的数据呢？ 谢谢大家的帮助啊！ 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.mat Data for Battery #5 B0006.mat Data for Battery #6 B0007.mat Data for Battery #7 B0018.mat Data for Battery #18 Data Structure: cycle: top level structure array containing the charge, discharge and impedance operations type: operation type, can be charge, discharge or impedance ambient_temperature: ambient temperature (degree C) time: the date and time of the start of the cycle, in MATLAB date vector format data: 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 data Rectified_impedance: Calibrated and smoothed battery impedance (Ohms) Re: Estimated electrolyte resistance (Ohms) Rct: Estimated charge transfer resistance (Ohms) |
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2楼2019-02-27 16:19:04
皮肤嘿嘿
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%使用MATLAB导入电池数据，在cycle中筛选要计算的目标，容量在discharge中提取，那么放电一次就充放电一次，提取多少Capacit%y就循环多少次，也可以对应时间轴，不过时间轴作用不大，因为长时间的涓流充电意义不大。给你部分MATLAB代码吧： clear clc load B0005 load B0006 load B0007 load B0018 j=1; type_name='discharge'; for i=1:length(B0005.cycle) % 5、6、7号电池数据长度相同 cycle_05=B0005.cycle(i); cycle_06=B0006.cycle(i); cycle_07=B0007.cycle(i); if strcmp(cycle_05.type,type_name)==0 continue else cap_05(j,  =cycle_05.data.Capacity;end |
3楼2021-02-19 22:46:40