CALCE Battery Data Archive


    Battery Data

    Usage of this data for publication purposes should include references to the CALCE battery data base and at least 3 articles referenced by CALCE and/or other contributors to this data collective.

    Data Description

    Small prismatic cells for portable electronic applications

    CS2 Samples

    • Capacity rating: 1100mAh
    • Cell Chemistry: LiCoO2 cathode. EDS results also showed trace elements of Manganese
    • Weight (with safety circuit removed): 21.1g
    • Dimensions (mm): 5.4 X 33.6 X 50.6
    • Special Notes: Jellyroll configuration wrapped around the "length" axis, indicated by the red arrows below

    CS2 Tests

    All tests underwent the same charging profile which was a standard constant current/constant voltage protocol with a constant current rate of 0.5C until the voltage reached 4.2V and then 4.2V was sustained until the charging current dropped to below 0.05A. Unless specified, the discharge cut off voltage for these batteries was 2.7V.

    • CS2_3: Cycled at constant current discharge, Each cycle the discharge current was alternated between 0.11, 0.22, 0.55, 1.1, 1.65, 2.2 Amps CS2_3 data files
    • CS2_7: Cycled at a constant current discharge of 0.55A. The cut-off voltage was changed at random times to simulate a users uncertain cut-off voltage behavior CS2_7 data files
    • CS2_8: Cycled at constant current of 0.5C CS2_8 data files
    • CS2_9: Cycled at constant current discharge, Each cycle the discharge current was alternated between 0.11, 0.22, 0.55, 1.1, 1.65, 2.2 Amps CS2_9 data files
    • CS2_21:Cycled at constant current of 0.5C CS2_21 data files
    • CS2_33:Cycled at constant current of 0.5C CS2_33 data files
    • CS2_34:Cycled at constant current of 0.5C CS2_34 data files
    • CS2_35:Cycled at constant current of 1C CS2_35 data files
    • CS2_36:Cycled at constant current of 1C CS2_36 data files
    • CS2_37:Cycled at constant current of 1C CS2_37 data files
    • CS2_38:Cycled at constant current of 1C CS2_38 data files
    • CS2_5: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 3.77V and 2.7V with a 0.55A discharge current in order to cycle the battery in a low regime partial charge/discharge cycle. CX2_5 data files
    • CS2_6: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 3.77V and 2.7V with a 0.55A discharge current in order to cycle the battery in a low regime partial charge/discharge cycle. CX2_6 data files
    • CS2_24: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 4.2V and 3.77V with a 0.55A discharge current in order to cycle the battery in a high regime partial charge/discharge cycle. CX2_24 data files
    • CS2_25: For each file, the battery was first fully charged and then fully discharged at 0.22A. Then the battery was cycled between 4.2V and 3.77V with a 0.55A discharge current in order to cycle the battery in a high regime partial charge/discharge cycle. CX2_25 data files

    CX2

    • Capacity rating: 1350mAh
    • Cell Chemistry: LiCoO2 cathode. EDS results also showed trace elements of Manganese
    • Weight (with safety circuit removed): 28g
    • Dimensions (mm): 6.6 X 33.8 X 50
    • Special Notes: Jellyroll configuration wrapped around the "width" axis

    CX2 Tests

    • CX2_3: Discharged at a constant current of 0.5C to a cut-off voltage of 2.7V. After charging the battery was discharged with a pulsed current alternating between 0.5C, 1C, and 0C each for 30 seconds until the voltage dropped to 3.2V. The profile was repeated over the batteries cycle life CX2_3 data files
    • CX2_4: Discharged at a constant current of 1C to a cut-off voltage of 2.7V. After every 10 charge/discharge cycles the ambient temperature was raised 10 degs C so that the battery was temperature cycled between 25, 35, 45, 55 degrees Celsius. CX2_4 data files
    • CX2_8: Discharged at a constant current of 3C. CX2_8 data files
    • CX2_16: Cycled at a constant current discharge of 0.5C CX2_16 data files
    • CX2_31: Cycled at a constant current discharge of 0.5C CX2_31 data files
    • CX2_33: Cycled at a constant current discharge of 0.5C CX2_33 data files
    • CX2_34: Cycled at a constant current discharge of 1C CX2_34 data files
    • CX2_35: Cycled at a constant current discharge of 0.5C CX2_35 data files
    • CX2_36: Cycled at a constant current discharge of 1C CX2_36 data files
    • CX2_37: Cycled at a constant current discharge of 1C CX2_37 data files
    • CX2_38: Cycled at a constant current discharge of 1C CX2_38 data files
    • CX2_32: Cycled under a pulsed discharge loading profile. First a discharge of 0.675A was applied followed by a 5 minute rest, and then a 1.35A discharge was applied followed by a 5 minute rest and finally a 2.70A discharge was applied followed by a 5 minute rest. This was repeated until the battery reached its voltage cut-off threshold. CX2_32 data files

    A123 Samples

    • Capacity rating: 2230mAh
    • Cell Chemistry: LiFePO2
    • Weight (with safety circuit removed): 76g
    • Dimensions (mm):
      • Diameter: 25.4 mm
      • Length: 65 mm
    • Special Notes: Tab length is not included in the dimensions.

    A123 Tests

    K2 Samples

    • Capacity rating: 2600mAh
    • Cell Chemistry: LiFePO2
    • Weight (with safety circuit removed): 80.5g
    • Dimensions (mm):
      • Diameter: 26.5 mm +-0.2mm
      • Length: 65.2 mm +-0.4mm
    • Special Notes: Tab length is not included in the dimensions.
        • Nominal Voltage: 3.2
        Cycle Life: 2000+
        Cylindrical & high powered cells.

    K2 Tests

    Data

    SPECIAL NOTES: All files are xlsx format except CX2_4, CX2_31, CS2_8, and CS2_21 which give the data as txt files. The naming convention for the files uses the first three characters to designate the lot number "CS2" or "CX2" this is followed by a "_" which is then followed by the sample number and then another "_" The numbers following the second "_" is the date that the file was downloaded which provides a chronological order of the files. For the battery CX2_4 which was cycled at different temperatures, thermal couple data is also provided in the Temperature folder. This data is in the xlsx format.



    Pouch Cells

    1. PL Samples

    • Capacity rating: 1500mAh
    • Cell Chemistry: Graphite/LiCoO2
    • Weight (with safety circuit removed): 30.3gm
    • Dimensions (mm): 3.4 mm x 84.8 mm x 50.1 mm

    Partial SOC Tests

    All tests except the ones with 100% SOC as upper limit of charge underwent the constant current charge-discharge cycle profile. For tests with 100% SOC as upper limit of charge, standard constant current constant voltage (CCCV) profile was applied during charging. However, discharge was carried out using constant current profile. In CCCV profile battery was charged with a constant current rate of 0.5C until the voltage reached 4.2V and then 4.2V was sustained until the charging current dropped to below 0.05A. 2.75 V is considered as the 0% SOC for the tests. Coulomb counting method has been used to calculate the time durations of charge and discharge to maintain the SOC values within designated SOC ranges.

    2. PLN Samples

    • Capacity rating: 1500mAh
    • Cell Chemistry: Graphite/LiCoO2
    • Weight (with safety circuit removed): 30.3gm
    • Dimensions (mm): 3.4 mm x 84.8 mm x 50.1 mm

    Storage Life Test

    A total of 144 Li-ion cells with three different SOC values (0% SOC, 50% SOC and 100% SOC) underwent battery storage life test under four different temperatures (-40C, -5C, 25C, 50C)

    • 12 cells were stored at each of these temperatures: -40C, -5C, 25C and 50C.
    • Of the12 cells stored at each temperature, 4 cells were stored at 50% SOC, 4 cells at 100% SOC, and 4 cells at 0% SOC.
    • 48 cells underwent capacity testing and impedance measurement every 3 weeks; 48 cells underwent capacity testing and impedance measurement every 3 months; and 48 cells underwent capacity testing every 6 months.

    For example: Cell PLN_51 underwent the initial capacity test with CCCV charging at a rate of C/2. Once the current fell below C/100 rate, the cell was discharged at a rate of C/2 to accumulate the deliverable maximum capacity of the cell. Then, the cell was fully charged using the same CCCV profile followed an impedance test. In the next step, the cell was discharged to 50% SOC through calculating the accumulative capacity to half of the maximum capacity. Further, the cell was stored into the temperature chamber for 3 weeks. After 3 weeks, the cell would be taken out for the capacity and impedance tests.