1. Explosion-proof valve opening:
General electrolytic capacitor burst valve open reason: in the whole process of application, release too large working voltage, harmonic distortion current is too large, release the opposite direction of working voltage, often battery charging, release AC current, application temperature is too high. How do you know if the blast valve is open?

2. Volume reduction:
The volume of the chip electrolytic capacitor is reduced for two reasons: first, the manufacturer is shoddy, the lithium battery electrolyte is not enough, or the quality of the lithium battery electrolyte is defective. Second: release overvoltage, harmonic distortion current is too large, release the opposite direction of the working voltage, often battery charging, release AC current, application temperature is too high.

3. Increased wear:
The increase of electrolytic capacitor loss is closely related to the decrease of volume, and their leading factors are similar

4. Leakage current status:
Air oxide film deterioration, sulfate invasion

5. Short circuit fault:
Condition: The air oxide film deteriorates, the air oxide film, the insulating layer function of the electrolysis paper is damaged.

6. Leads:
Poor contact between leads of electrolytic capacitors and aluminum-platinum, corrosion, sulfate intrusion.