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datou_nono銀蟲 (小有名氣)
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[求助]
NASA battery capacity data set 分析
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有沒有使用過NASA battery capacity data set的啊，如下給出Li-ion batteries (# 5, 6, 7 and 18)的數(shù)據(jù)及測試條件。對于這樣的mat文件，怎么得到橫軸為充放電次數(shù)，縱軸為電池容量的數(shù)據(jù)呢？ 謝謝大家的幫助�。� 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樓2019-02-27 16:19:04
皮膚嘿嘿
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%使用MATLAB導入電池數(shù)據(jù)，在cycle中篩選要計算的目標，容量在discharge中提取，那么放電一次就充放電一次，提取多少Capacit%y就循環(huán)多少次，也可以對應時間軸，不過時間軸作用不大，因為長時間的涓流充電意義不大。給你部分MATLAB代碼吧： clear clc load B0005 load B0006 load B0007 load B0018 j=1; type_name='discharge'; for i=1:length(B0005.cycle) % 5、6、7號電池數(shù)據(jù)長度相同 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樓2021-02-19 22:46:40
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