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  • NCM 18650-26P 3.6V 2500mAh
    Specification of Product for Lithium-ion Rechargeable Cell
    Model:MX18650-26P
    Scope
    This product specification defines the requirements of the rechargeable lithium ioncell to be supplied to the Customer by Enershare Energy Technology Co., Ltd.
    Description and Model
    Description: Lithium-ion rechargeable cell
    Model: MX18650-26P
    Site: Shenzhen, Guangdong
    Outline Dimensions
    Appearance
    There shall be no such defects as deep scratch, crack, rust, discoloration or leakage,which may adversely affect the commercial value of the cell.
    Nominal Specifications
    Item Condition Specification
    Nominal capacity Std. Charge/discharge(Refer to 6.2.1 and 6.2.2) 2500mAh
    Energy for reference only 9Wh
    Nominal Voltage / 3.6V
    Standard Charge Constant Current
    Constant Voltage
    End Condition
    0.5C(1250mA)
    4.2V
    50mA
    Max. Charge Current
      4.2V
    Max. Charge Current
      1.0C(2500mA)
    Standard Discharge Constant Current
    End Voltage
    1.0C(2500mA)
    2.75V
    Max.Discharge Current   2.0C(5000mA)
    Cycle life
      500cycles≧90% of Initial Capacity. Or 1000cycles ≧80% of Initial Capacity
    Cell Weight   ≦45g
    Cell Dimension   Height: Max 65.3mm
    Diameter:Max 18.55mm
    Crading specification Capacity
    OCV
    ACR
    30mAh
    8mV
    4MΩ
    Operating Temperature
    Charge 0 to 45℃
    Discharge -20 to 60℃
    Protection rating IP34 PCS room
    Storage Temperature
    (40%SOC)
    1 month
    3 month
    1 year
    -20℃ ~ 60℃
    -20℃ ~ 45℃
    -20℃ ~ 25℃
    Nominal Specifications
    Electrical specification
    Item Condition Specification
    Initial AC Impedance Cell shall be measured at 1kHz after charge per 6.2.1
    ≦30mΩ
    Initial Capacity Call shall be charged per 6.2.1 and discharged per 6.2.2 within 1h after full charge. ≧2500mAh
    Cycle life @25℃   90% of Initial Capacity.
    Or 1000cycles ≧80% of Initial Capacity.
    Discharge Capacity under different temperature After being charged per 6.2.1, respectively, set at -20℃, 0℃,25℃ placed no less than 24h, at 40℃, 55℃ for 5 hours, discharge at 0.2C to 2.75V(-20℃ discharge to 2.2V).
    Discharge capacity/ initial capacity -20℃≧70% 0℃≧80% 25℃≧98% 40℃≧96% 55℃≧95%
    Discharge Rate Characteristics
    Under the condition per 6.1, charge the cell per 6.2.1, rest 10min, respectively discharge at 1C, 2C, 3C to 2.75V, record capacity.
    Discharge capacity/ initial Capacity 1C: ≧100% 2C: ≧94% 3C: ≧90%
    Charge Rate Characteristics
    Under the condition per 6.1, respectively charge the call at 1C, 2C CV to 4.2V cut off at 0.02C, rest 10min, discharge at 1C to 2.75V, record capacity. 1C Charging capacity ≧90% Initial capacity 2C Charging capacity ≧80% Initial capacity
    Mechanical Specification
    Item Condition Specification
    Drop test Cells charge per 6.2.1 are dropped onto an oak board from 1.5 meter height for 1 cycle, 2 drops from side of cell. (Total number of drops =4).
    No explosion, No fire, No leakage
    Vibration test Cells charged per 6.2.1 are vibrated for 90 minutes per each of the three mutually perpendicular axes (x, y, z) with total excursion of 0.8mm, frequency of 10Hz to 55Hz and sweep of 1Hz change per minute.
    No explosion, No fire, No leakage
    Quality assurance
    Cells are guaranteed to be free from defects in workmanship and materials for a period of 3 month provided that the manufacturer can confirm such defects are coming from manufacturing abnormality and not from abusive usage, or else manufacturer will solve the quality problem. Dynabat won’t replace a new cell for free if the defects are not due to the failure of manufacturing process or is due to customer’s abuse or misuse.
    Storage and Transportation
    • It is recommended to charge and discharge once every 3 months.
    • It is recommended to avoid being smashed, sum shined or water deluge.
    • Handling precaution and prohibitions of lithium ion rechargeable cells
    • Inaccurate handling of lithium ion cell may cause leakage, heat, amoke, an explosion, or fire.
    • This could cause deterioration of performance or failure. Pleases be sure to follow instructions carefully.
    Storage
    Store the cells at room temperature (25±5℃) is recommended, low humidity, no dust and no corrosive gas atmosphere.
    Environmental specification
    Item Condition Specification
    Storage Characteristics
    Initial capacity was got according to 6.2.1 and 6.2.2, then charge the cell per 6.2.1, store it under room temperature for 28 days, then check its remaining capacity per 6.2.2; test its recovery capacity according to 6.2.1 and 6.2.2.
    Remaining capacity ≧ 95% of Initial capacity Recovery capacity ≧98% of Initial capacity
    High temperature storage characteristics Initial capacity was got according to 6.2.1 and 6.2.2, then charge the cell per 6.2.1, store it under 55℃ for 7 days, then check its remaining capacity according to 6.2.1 and 6.2.2.
    Remaining capacity ≧85% of Initial capacity Recovery capacity ≧90% Initial capacity
    High temperature storage Initial capacity was got according to 6.2.1 and 6.2.2, charge the cell per 6.2.1, discharge at 1C for 30min at RT, then store it under 45±2℃ for 28 days. Put it under RT for 5h, discharge at 1C to 2.75V. Get the recovery capacity according to 6.2.1 and 6.2.2.
    Recovery capacity ≧90% Initial capacity
    Safety specification
    Item Condition Specification
    Over Charge
    Cells charged per 6.2.1 are discharged at
    constant current of 1.0C for 90min, observe for
    1h.
    No explosion, No fire, No leakage
    Over Charge
    Cells charged per 6.2.1 are charged at constant
    current of 1.0C until 6.3V or for 1h, observe
    for 1h.
    No explosion, No fire
    External short
    Cells charged per 6.2.1 are externally shorted
    by wire with less than 5mΩ load for 10min,
    observe for 1h.
    No explosion, No fire
    Heating test
    Cells are charged per 6.2.1 and heated in a
    circulating air over at a rate of 5℃ per minute
    to 130℃. At 130℃, over is to remain for 30
    minutes before test is discontinued; observe
    for 1h.
    No explosion, No fire
    Crush Cells charged per 6.2.1 are crushed with their
    longitudinal axis parallel to the flat surface
    of the crushing apparatus; observe for 1h.
    No explosion, No fire
    Seawater immersion Cells charged per 6.2.1 are emerged into NaCl
    solution(concentration 3.5%) for 2h; observe for 1h.
    No explosion, No fire
    Temperature shock
    Cells charged per 6.2.1 are put into the test
    chamber, undergoing the following test
    procedure for 5 cycles:-40℃(3.5h)→25℃
    (3.5h)→85℃(6.83h)→25℃(8h), observe for 1h.
    No explosion, No fire
    Low air pressure
    Cells charged per 6.2.1 are put into the test
    chamber, adjust the pressure to 11.6kPa for 6h,
    RT, observe for 1h.
    No explosion, No fire, No leakage