Model:18FP-3.52W
Major Technical Parameters
1.Dimension including casing (mm): 65.20±0.30(H), ≤18.60(D)
2.Nominal Capacity: 1100mAh (0.5C,current value of 1100mA at 1C)
3.Minimum Capacity: 1050mAh (0.5C)
4.Nominal Voltage: 3.2V
5.AC Internal Resistance: ≤18 mΩ (AC 1kHz measurement at 25 ± 2ºC)
6.Max. Charging Current: 5.5A (25ºC)
7.Fast Discharge Current: 11A (This current is the maximum current recommended for the combination of cells, and the specific value should be determined according to the combination structure. The maximum operating current is set at a temperature not exceeding 60 ºC)
8.Max.Continuous Discharge Current: 33A(25ºC,not for cycle life)
9.Pulse Discharge Current: 40A,10s
10.Cycle Characteristic(25ºC): 3000 times(50%DOD), 1000 times(80%DOD), 500 times(100%DOD) (The residual capacity is no less than 70% of rated capacity at 1C/10C rate)
11.Working Temperature(Including temperature rise): Charge at 0~60ºC and discharge at -30ºC~65ºC (Regardless of the charging/discharging mode of the battery, if it exceeds the operating temperature, please stop charging/ discharging immediately)
12.Cell Weight: Approx 39.5g (Including casing)
Electrical performance test methods
1.Standard Charge: Constant-current charge to 3.65 V at 0.5C, constant voltage charge to stop until 0.01C.
2.Discharge capacity at normal temperature: After full charge, the experiment can be put on hold for 10 minutes; 0.5C discharge to 2.5V allows five repetitions. When the range of three consecutive experiments is less than 3% of the rated capacity, the experiment can be completed ahead of time and the maximum value of the test results can be obtained.
3.Discharge performance at different temperatures: After standard charging of normal batteries, it should be stored at least 12 hours in the constant temperature environment of -20ºCºC, -10ºCºC, 0ºCºC, 10 and 25ºCºC, respectively, and at least 5 hours of 60ºCºC. Then discharge with 0.5C current to the corresponding termination voltage at -20ºCºC, -10ºCºC, 0ºCºC, 10ºCºC, 25ºCºC, and 60 When the ambient temperature is more than 15ºCºC, the termination voltage is 2.5V, if less than 15ºCºC, which is 2.0V. (capacity ratio = discharge capacity at different temperatures /25ºC discharge capacity *100%, Discharge capacity retention rate at different temperatures: -20ºC≥40%;-10ºC≥60%;0ºC≥70%;10ºC≥80%;25ºC=100%;60ºC≥95%.)
4.Discharge performance at different rates at room temperature: After standard charging of normal batteries, it should be placed for 10 minutes at the prescribed ambient temperature. Then discharged to 2.5V at different rates of 0.5C, 1C, 3C, 5C , and discharged to 2.0V at different rates of 10C, 15C, 20C, and 30C, respectively. The capacity of batteries with different discharge rates was recorded, and the temperature rise ΔT of batteries with different discharge rates was recorded synchronously. capacity ratio = discharge capacity at different rate /0.5C discharge capacity *100%. Discharge capacity retention rate and temperature rise at different rate
(ΔT temperature rise): 0.5C= 100%, ΔT≤5ºC; 1C≥95%, ΔT≤10ºC; 3C≥90%, ΔT≤15ºC; 5C≥90%, ΔT≤20ºC;10C≥90%, ΔT≤20ºC; 15C≥90%, ΔT≤35ºC; 20C≥90%, ΔT≤40ºC; 30C≥85%, ΔT≤55ºC.
5.Charge retention and capacity recovery capability: Normal batteries are charged according to the standard. They are placed in open circuit for 28 days at room temperature, and then discharged to 2.5V at 0.5C. The recovery capacity of the battery was tested according to the charging and discharging standards. Capacity Retention=storage capacity/ initial capacity≥ Capacity Recovery =recovery capacity/ initial capacity≥95%.
6.Charge retention and capacity recovery capability at high temperature: After standard charging, normal batteries are placed open circuit for 7 days in the environment of 55±2ºCºC. After the storage period expires, they are placed for 5 hours at room temperature, and then discharged to 2.5V at 0.5C. The recovery capacity of the battery was tested according to the charging and discharging standards. Retention Ratio=storage capacity/ initial capacity≥ Recovery ratio =recovery capacity/ initial capacity≥95%.
7.Cycle characteristic: Stand for 5min, charge at 1C, and discharge at 10C to 2.0V, which is counted as one cycle. The interval between each cycle should not be less than 10 minutes, and the discharge capacity should end when it is less than 70% of the rated capacity.
8.Suggestions for Cell Packs: The BMS shall include the following monitoring and control features as a minimum requirement.
(1) Stop charging: ≤3.65V, Stop charging when cell voltage reaches 3.65V.
(2) First overcharge protection:≤3.85V,Force stop charging by BMS when cell voltage reaches 3.85V.
(3) Stop discharge:≥2.5V,When the voltage reaches 2.5V, the discharge should be terminated.
(4) Over discharge protection:First stage over-discharge protection ≥2.3V; The second stage over-discharge protection ≥2.0V.(When the voltage re aches 2.3V, BMS forcibly terminates discharge; When the voltage is below 2.0V, charging is prohibited.)
(5) Short circuit protection: No short circuit allowed.(When a short circuit occurs, the cell should be disconnected by the overcurrent protection device.)
(6) Overcurrent protection: Current≤42A (BMS controls the charge and discharge current to meet the specifications)
(7) Overheating protection: Cell temperature≤60ºC.(Stop charging and discharging when temperature exceeds specification.)
(8) Low temperature protection: Charging: T≥0ºC; Discharge: T≥-20ºC (Stop charging and discharging when temperature exceeds specification.)
Safety Characteristics
1.Overcharge: Normal batteries are charged at 1C constant current until the charging termination voltage is 1.5 times or after charging time reaches 1h, then stop charging and the appearance changes of the batteries are observed for 1h. (No explosion, No fire.)
2.Over Discharge: After the standard charging of the normal batteries, use 1C constant current discharge for 90min, and observe the appearance changes of the batteries for 1h.(No explosion, No fire.)
3.External Short-circuit: After standard charging of normal batteries, direct short circuit positive and negative poles for 10 minutes, external line resistance should be less than 5 mΩ. End the test when the battery temperature drops to about 10 below the peak temperature and the appearance changes of batteries are observed for 1 hour.(No explosion, No fire.)
4.Thermal Abuse: The initial state of the normal battery was measured. After standard charging, the battery was placed in the oven. The temperature was increased to 130±2 at a rate of (5±2ºCºC)/min and kept for 30 minutes. Then the appearance of the battery was observed for one hour.(No explosion, No fire.)
5.Drop: After standard charging of normal batteries, the initial state of the batteries was measured, and the test batteries were freely dropped from 1.5m height to flat cement ground, once in each direction.(No explosion, No fire.)
6.Heavy Impact: A diameter of 15.8 mm steel rod is placed in the middle of the fully charged cell, then the weight of 10kg hammer from 1.0m height free falls to the cell upper.(No explosion, No fire.)
7.Extrusion Test: After standard charging of normal batteries, pressure is applied perpendicular to the electrode plate or the longitudinal axis of batteries. The area of extrusion head is not less than 20 cm2, and the pressure gradually increases to 13 kN or the deformation reaches 30%.(No explosion, No fire.)
8.Prick test: After standard charging of normal batteries, useΦ3~5mm high temperature resistant steel needle, to 10 mm/s ~ 40 mm/s of speed, from the perpendicular to the direction of the cell plate. (The steel needle stays in battery for more than 5 minutes). (No explosion, No fire.)
Environmental Adaptability
1.Thermal Cycle: Store the cell for 48 hours at 75±2 after standard charge, then store the cell at -20 for 6 hours, and at room temperature for 24 hours. Observe the batteries.(No leakage, No smoke, No fire, No explosion.)
2.Static Humidity: Put the cell at 40ºCºC±5 and 95%RH chamber for 48h, then get it out and store it for 2h at room temperature. Observe the appearance and discharge at 0.5C to 2.5V, then test the final capacity.(Discharge capacity after storage is more than 90% of rated capacity. No obvious outside damage, No corrosion, No smoke, No explosion)
3.Vibration: (1)vibration frequency/Hz A 10~30 B 30~55
(2)Displacement breadth (single swing) 0.38mm 0.19mm
Standard charge. Equip it to the vibration platform, prepare the test equipment according to above vibration frequency and relevant swing, doing frequency sweeping from X, Y, Z three directions, each from 10Hz to 55Hz for 30 minutes of recycling, rating of which is 1oct/min Observe the final state after scanning.(Residual Capacity≥90% Rated Capacity, Voltage Decrease Rate ≤0.5%, No obvious outside damage, No leakage, No smoke, No explosion)
Storage
Storage Temperature:45~55ºC non-condensing within 1 month
25~45ºC non-condensing within 3 months
-20~25ºC non-condensing within 12 months
It is recommended that the battery storage SOC be in the range of 20 to 50%. The battery is stored in an environment free of corrosive gases and cannot withstand any pressure. The ground where batteries are stored should not show any signs of moisture phenomenon. The battery should be charged and discharged once every three months.
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