Patent ID: 11909075
Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. A method for manufacturing a secondary battery comprising an electrode assembly that comprises a positive electrode and a negative electrode, a nonaqueous electrolyte, and a battery case comprising a liquid injection hole for injecting the nonaqueous electrolyte, the battery case housing the electrode assembly and the nonaqueous electrolyte, the method comprising:
temporary sealing, by using a device, the liquid injection hole of the battery case housing the electrode assembly and the nonaqueous electrolyte with a cylindrical plug having therein a non-through hole that has an opening on one end surface, wherein
the device comprises:
an insertion pin configured to be inserted into the non-through hole from the opening of the cylindrical plug; and
a guide portion configured to guide a peripheral wall surface of the insertion pin, the guide portion being slidable in an axial direction of the insertion pin, and

the temporary sealing comprises:
when the cylindrical plug is disposed inside the liquid injection hole, causing the insertion pin to be pushed into the non-through hole with the guide portion in contact with a periphery of the opening, to attach the cylindrical plug into the liquid injection hole, and
after the attachment of the cylindrical plug,
causing the insertion pin to be moved in an opposite direction to the non-through hole to remove the insertion pin from the non-through hole, and
detaching the guide portion from the opening.