1. Large internal polarization;

　　2. The electrode absorbs water and reacts with the electrolyte, causing a gas bubble;

　　3. The quality and performance issues of the electrolyte itself;

　　4. The amount of liquid injected cannot meet the process requirements;

　　5. Poor sealing performance of laser welding during the assembly process, resulting in air leakage during leak detection;

　　6. Dust and polar dust can first cause micro short circuits;

　　7. The positive and negative electrode plates are thicker than the process range, making it difficult to insert into the shell;

　　8. Liquid injection sealing problem, poor sealing performance of steel balls leading to air bubbles;

　　9. The incoming material of the shell has a thick shell wall, and the deformation of the shell affects the thickness;

　　10. The high temperature outside is also the main cause of the explosion.

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