The CALCE battery team is open to collaborate with research groups and companies around the world. We provide open access to our experimental test data on lithium-ion batteries, which includes continuous full and partial cycling, storage, dynamic driving profiles, open circuit voltage measurements, and impedance measurements. Battery form factors include cylindrical, pouch, and prismatic, and the chemistries include LCO, LFP, and NMC. The data from these tests can be used for battery state estimation, remaining useful life prediction, accelerated battery degradation modeling, and reliability analysis. A description of each battery and each test is presented below. Use of this data for publication purposes should include references to the CALCE article(s) that describe the experiments conducted to generating the data. If you have questions or are interested to contribute your data to the battery data collective, please contact Prof. Michael Pecht.
| INR 18650-20R Battery | A123 Battery | CS2 Battery | CX2 Battery | PL Sample | Storage Data & Test Description | Accelerated Testing Data | Anomaly Detection Data |
|---|
Pouch Cells
| Battery (Parameters) | Specifications (Value) |
| Capacity Rating | 3360 mAh |
| Cell Chemistry | Cathode: LiCoO2 Anode: graphite |
| Nominal voltage | 3.82 V |
| Charge cut-off voltage | 4.4 V |
| Discharge cut-off voltage | 3.0 V |
Data and Test Description
Accelerated cycle life testing of lithium-ion batteries is conducted as a means to assess whether a battery will meet its life cycle requirements. We presented a study to identify optimal accelerated cycle testing conditions for LiCoO2-graphite cells. A full factorial design of experiment with three stress factors—ambient temperature (10 ℃, 25 ℃, 45 ℃, 60 ℃), discharge current rate (C-rate, 0.7C, 1C, 2C), and charge cut-off C-rate (C/5, C/40)—is used to study the effects of these stress factors on battery capacity fade and to obtain the data necessary for decision making.
Discharge capacity over cycles - the effect of ambient temperature.
| Standard charging profile | 1) 1.5C charge to 4.2 V 2) Hold 4.2 V until the current decreases to 1C 3) 1C (=3.36 A) charge to 4.4 V 4) Hold 4.4 V until the current decreases to 0.025C |
| Standard discharging profile | 0.7C to 3.0 V |
| Sample Size | 192 |
| Initial Characterization | 192 Cells |
| Capacity Measurement | 1) Charge using the standard charging profile 2) Rest 5 mins 3) Discharge using the standard discharging profile |
| Accelerated Testing |
After initial characterization, each cell was cycled at stress factor 1 1) 1.5C charge to 4.2 V |
| Stress factor 1 (Ambient temperature) | • 10 ºC • 25 ºC • 45 ºC • 60 ºC |
| Stress factor 2 (Charge cut-off current) | • C/5 • C/40 |
| Stress factor 3 (Discharge rate) | • 0.7C • 1C • 2C |
| Test Conditions | |
| Condition 1 (C/5 & 10ºC & 0.7C) | Sample # 1-8 |
| Condition 2 (C/40 & 10ºC & 0.7C) | Sample # 9-16 |
| Condition 3 (C/5 & 10ºC & 1C) | Sample # 17-24 |
| Condition 4 (C/40 & 10ºC & 1C) | Sample # 25-32 |
| Condition 5 (C/5 & 10ºC & 2C) | Sample # 33-40 |
| Condition 6 (C/40 & 10ºC & 2C) | Sample # 41-48 |
| Condition 7 (C/5 & 25ºC & 0.7C) | Sample # 49-56 |
| Condition 8 (C/40 & 25ºC & 0.7C) | Sample # 57-64 |
| Condition 9 (C/5 & 25ºC & 1C) | Sample # 65-72 |
| Condition 10 (C/40 & 25ºC & 1C) | Sample # 73-80 |
| Condition 11 (C/5 & 25ºC & 2C) | Sample # 81-88 |
| Condition 12 (C/40 & 25ºC & 2C) | Sample # 89-96 |
| Condition 13 (C/5 & 45ºC & 0.7C) | Sample # 97-104 |
| Condition 14 (C/40 & 45ºC & 0.7C) | Sample # 105-112 |
| Condition 15 (C/5 & 45ºC & 1C) | Sample # 113-120 |
| Condition 16 (C/40 & 45ºC & 1C) | Sample # 121-128 |
| Condition 17 (C/5 & 45ºC & 2C) | Sample # 129-136 |
| Condition 18 (C/40 & 45ºC & 2C) | Sample # 137-144 |
| Condition 19 (C/5 & 60ºC & 0.7C) | Sample # 145-152 |
| Condition 20 (C/40 & 60ºC & 0.7C) | Sample # 153-160 |
| Condition 21 (C/5 & 60ºC & 1C) | Sample # 161-168 |
| Condition 22 (C/40 & 60ºC & 1C) | Sample # 169-176 |
| Condition 23 (C/5 & 60ºC & 2C) | Sample # 177-179 (first 3) |
| Condition 24 (C/40 & 60ºC & 2C) | Sample # 185-187 (first 3) |
The above data files have been referenced in:
[2] Algorithm to determine the knee point on capacity fade curves of lithium-ion cells. Diao, W., Saxena, S., Han, B., and Pecht, M. (2019). Energies, 12(15), 2910.
[3] Evaluation of present accelerated temperature testing and modeling of batteries. Diao, W., Xing, Y., Saxena, S., and Pecht, M. (2018). Applied Sciences, 8(10), 1786.
| INR 18650-20R Battery | A123 Battery | CS2 Battery | CX2 Battery | PL Sample | Storage Data & Test Description | Accelerated Testing Data | Anomaly Detection Data |
|---|
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