Lithium battery separatorPreventive measures for abnormal points in 50 point testing

1、 Diaphragm Material and Process Optimization

1. Thickness control

lUse high-precision thickness gauges (such asCHY-02H) Ensure that the thickness tolerance of the diaphragm is ≤± 0.5 μ m to avoid local weak points causing abnormal breakdown voltage.

lLaser cutting technology is used in the production process to reduce burrs on the polarizer and prevent mechanical damage to the diaphragm.

3. Coating process improvement

a.Optimize coating uniformity and reduce uneven distribution of micropores (such as adjusting the tension parameters of the coating machine).

b.Using automated assembly equipment to ensure that the diaphragm is flat and free of bubbles, avoiding poor contact during testing.

2、 Test environment and parameter settings

lenvironmental control

a.Before testing, place the diaphragm inLet it stand in an environment of 40 ℃ and RH 10-35% for 24 hours to eliminate stress effects.

b.The laboratory humidity needs to be stable≤30% RH， Prevent large data dispersion caused by humidity fluctuations.

lparameter adjustment

a.The boosting rate should be adjusted according to the material properties (such as brittle materials)0.5kV/s）。

b.The initial voltage is set to the nominal withstand voltage value50%, to avoid abnormal breakdown caused by sudden voltage rise.

3、 Equipment maintenance and calibration

lroutine maintenance

nClean the test bench and electrodes monthly, check for wear and tear, and replace them if necessary.

nCalibrate the voltage sensor to ensure error≤ 2%.

2. Functional Verification

lRegularly verify equipment accuracy with standard membranes and check for rapid discharge（Is the DCW function functioning properly.

4、 Operating standards and training

lOperators need to be familiar with the equipment interlocking protection mechanism to avoid accidentally touching the high-voltage switch.

lRefer to video tutorials to learn standardized operating procedures (such as sample placement and parameter settings).

Detailed exploration of thin films50 point withstand voltage test (i.e. breakdown voltage test) for environmental requirements. Environmental conditions are crucial factors that affect the results of electrical strength testing, and their importance is no less than the requirements for electrodes. If the environmental control is improper, even if the equipment and electrodes meet the standards, the obtained data may still be invalid or unreliable.