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Professional sales battery team

Perfect quality process

Professional sales battery team Perfect quality process


LIR1254-78mAh 1C Store more power in the same volume, high safety and reliability

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Categories: Li-ion battery cellIn Stock

Safety test items
1. Heavy object impact Put the battery cell on the impact table, place a steel column with Φ 15.8mm in the center of the battery, the longitudinal axis of the steel column is parallel to the plane, let the weight of 9.1kg heavy hammer fall freely from the height of 610mm, impact the electricity The core, the battery core is allowed to deform, the battery core should not fire or explode
2. Extrusion Place the largest plane of the cell parallel to the extrusion plane of the extrusion equipment, and place it between the two extrusion planes of the extrusion equipment, and gradually pressurize it to 13kN, and keep the pressure for 1 min.
3. Acupuncture Place the battery cell on the operating table, use a 3mm diameter stainless steel needle to pierce the center of the largest surface of the battery at a speed of 20mm/s~40mm/s, and keep the battery cell for 1 min without fire or explosion
4. Free fall: Drop the cell sample freely from a height of 1m to an 18-20mm thick wooden board placed on the concrete floor, and fall freely in each of the positive and negative directions (six directions) of X, Y, and Z 1 time. After the free fall is over, discharge the battery cell with a current of 1C5A to the termination voltage, and then perform a charge-discharge cycle with a current of 1C5A until the discharge time is not less than 51min, then the charge-discharge cycle can be terminated. The number of charge-discharge cycles should not exceed 3 times The battery does not fire or explode
5. Thermal shock (130℃10min) Hang the cell with insulated wire in a temperature shock box (far-infrared blast oven or vacuum oven), and the temperature of the shock box will rise to 130℃± at a rate of 5℃±2℃/min 2℃, keep for 10min, observe the state of the cell, the cell does not catch fire or explode
6. Overcharge (3C5A4.6V) discharge the battery cell to the cut-off voltage according to the standard, then charge it to the specified voltage 4.6V with a constant current of 3C5A, and switch to constant voltage charging. The test will be terminated when the following conditions occur.
①Battery core failure (such as fire or explosion); ②The current is less than 0.05C5A, and the temperature of the battery core is 10℃ lower than the peak temperature; the battery core does not catch fire or explode
7. Over-discharge, charge the cell to the cut-off voltage with the standard charging system, then discharge at 1C5A constant current for 90min, the cut-off voltage is 0V; observe whether the cell is on fire or explode, after the test, the test voltage internal resistance cell does not catch fire or fails explosion
8. Short circuit Under the condition of an ambient temperature of 25℃±2℃, short circuit the positive and negative poles of the cell with a wire with a resistance of not more than 100mΩ in an explosion-proof box. Pay attention to temperature changes during the test. When any of the following conditions are met, test End. ①4h; ②When the open circuit voltage of the cell is less than 0.1; ③The core temperature of the core shell is less than 10℃ than the peak temperature. The cell does not fire or explode, and the maximum temperature of the shell center is ≤150℃

Warning notice
1. When charging, avoid charging over 4.35V, prevent overcharging of batteries, and prohibit reverse charging of positive and negative poles; the cut-off voltage should not be lower than 3.0V, charge
Electric current does not exceed 3C;
2. The battery cell should be semi-charged and stored in a dry area below 35 ℃;
3. Do not heat or throw the electric core into fire or water. Do not change or dissect the battery cell. Otherwise it will cause danger, such as fire, heat, leakage
To explode
4. Do not short-circuit the positive (+) and negative (-) cells of the battery, and keep the battery away from metals and other conductive materials. Poorly handle the positive (+) and negative (-) of the battery cell
And direct contact between metal and other conductive materials will cause short circuit of the battery;
5. Do not reverse the positive (+) and negative (-) of the battery cell;
6. When the battery cell deflates, heats up, changes color or other abnormal phenomena during use, charging and storage, immediately remove it from the fixture or charger
In addition, the battery cell is out of use.
7. Do not directly solder the battery cell. Excessive heat will cause the battery core components such as insulation to deform, which will cause the battery core to swell, leak, catch fire and
8. Do not use batteries that have been damaged under transportation pressure, drop, short circuit or other conditions, and batteries that release the smell of electrolyte.

Basic parameters
1. Nominal voltage 3.85 V
2. Nominal capacity 78 mAh, first charge 0.2C from 3.0V to 4.2V, with a cut-off current of 2mA; then charge 0.2C from 4.35V to 3.0v.
  3. Standard charging current 0.2 C
4. Maximum charging voltage 4.35V
5. Internal resistance ≤300mΩ
6 Charging method CC/CV (constant current/constant voltage)
7. Standard charging mode Constant current and constant voltage charging: 0.2C (15mA) to 4.35V; cut-off current 2mA Fast charging mode Constant current and constant voltage charging: 3C (234 mA) to 4.35V; cut-off current 2mA
8. Charging time ≤ 300 min (standard charging 0.2 C)
9. Fast charging time ≤ 45 min (fast charging 3 C)
10. Discharge cut-off voltage 3.0V
11. Operating temperature 0~45℃ charging
      -20~60℃ discharge
12. Storage temperature One month: -20~60℃
      Six months: -10~45℃
12 months: -5~35℃
13. Cell weight > 1.90 g
14. Cell diameter 12.0±0.1 mm
15. Cell height 5.4+0.2/-0.1 mm

Annex 1: Cycle life performance graph


Annex 2: High and low temperature discharge performance curve

Annex 3: Rate discharge performance chart


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