1. Failure phenomenon The seal between the cover and the bottom groove is not good or due to the collision, causing the sealing glue to cause leakage. The hat valve leaks. Acute acid leakage at the terminal. A acid leakage appears in other parts.

　　2. Inspection and treatment of faults

　　Do the appearance examination first to find out the osmotic leakage part. Take the lid to see if there is any trace of the night in the hat valve, and then open the hat valve to observe the inside of the battery. After completing the above work, if no abnormalities are found, gas tightness test should be performed (inflatable and pressure is placed in the water, observing whether the battery is produced and emerged, and there is a bubbles that indicate that there is an osmotic acid leakage). Finally, during the charging process, observe whether there is a flowing electrolyte generated, and if there is a flowing electrolyte during the charging process, it should be exhausted.

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