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About the reserved liquid injection hole?

The process of injecting the electrolyte (lithium hexafluorophosphate, etc.) into the battery according to the required amount by reserving the injection hole is divided into primary injection and secondary injection.

One-time liquid injection is the first liquid injection.


After the liquid is injected, the electrolyte is infiltrated into the pole piece through the high-temperature aging room to participate in the chemical reaction and realize the conversion of chemical energy and electrical energy.

The second liquid injection is a supplementary process for the electrolyte after formation. During the second liquid injection, sealing is also taken into account.


The commonly used sealing methods include rubber plugs, aluminum sheet laser sealing, steel balls, and glue dispensing.