EVE LF280K - Swelling Force Test; Safety Performance

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-EVE Power CO,LTD Confidential Proprietary-
Model
LF280K
Specification No
PBRI-LF280K-D06-0
Version
C
3.16 Swelling Force Test
Prepare and install the clamp according to 3.3.2.before the test.
Cycle according to (3.15.1)and record cell swelling force and discharge capacity retention rate
during test process. (3.15.1)
3.17 Safety Performance
3.17.1 Over-charge Test
Charge the cell according to (3.8)at the ambient temperature of 25°C±2℃,and install the test
clamp according to the methods in(3.3.1).Charge the cell to 5.475 V at a constant current of 280 A
or for 1 hour,and then stop charging.
Observe for 1 hour.(Refer to GB/T 36276-2018 Lithium ion battery for electrical energy storage)
3.17.2 Over-discharge Test
Charge the cell according to (3.8)at the ambient temperature of 25°C±2°C,and install the test
clamp according to the methods in(3.3.1).Discharge the cell to 0 V at a constant current of 280 A
or for 90 min,and then stop discharging. Observe for 1 hour.Refer to GB/T 36276-2018 Lithium
ion battery for electrical energy storage)
3.17.3 External Short-circuit Test
Charge the cell according to(3.8)at the ambient temperature of 25°C±2℃,and install the test
clamp according to the methods in(3.3.1).Short-circuit the positive and negative terminals of
the cell externally for 10 min,and the resistance value of the external circuit shall be less than 5
m2.Observe for 1h.(Refer to GB/T 36276-2018 Lithium ion battery for electrical energy storage)
3.17.4 Crush Test
At the ambient temperature of 25°C±2°C,charge the cell according to(3.8).And carry out
the test under the following conditions:
a) Crush direction:apply pressure perpendicular to the direction of the cell plate;
b) The form of the crush plate:a semi-cylinder with a radius of 75 mm,the length (L)of the
semi-cylinder is greater than the size of the cell being crushed (refers to the figure below);