Method for producing power storage device

Patent metadata

Field	Value
Publication number	US-12469938-B2
Application number	US-202318484449-A
Country	US
Kind code	B2
Filing date	Oct 11, 2023
Priority date	Nov 21, 2022
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A method for producing a power storage device includes an insert-molding step of making a resin member by insert-molding with respect to a terminal member inserted in an insertion hole of a lid. In this insert-molding step, the insertion hole of the lid is placed in front of a gate, and a molten resin is injected through the gate to flow in an opposite gate-side space in a cavity through the insertion hole, allowing the molten resin to spread over the entire cavity, to form the resin member.

First claim

What is claimed is:

1 . A method for producing a power storage device,
the power storage device including:
a case member including an insertion hole;
a terminal member inserted in the insertion hole of the case member; and
a resin member joined to the case member and the terminal member while insulating between the case member and the terminal member, to fix the terminal member to the case member,
the method comprising:
insert-molding the resin member in a state where the terminal member is inserted in the insertion hole of the case member,
wherein insert-molding the resin member is performed using a molding mold by:
placing the insertion hole of the case member in front of a gate through which molten resin is injected into a cavity defined by the case member, the terminal member, and the molding mold; and
injecting the molten resin through the gate into the cavity, so that the molten resin flows, through the insertion hole, to an opposite gate-side space located on an opposite side from the gate relative to the case member, and spreads over the entire cavity to form the resin member.

2 . The method according to claim 1 , wherein
the insertion hole includes:
an insertion part in which the terminal member is inserted; and
a cutout extending from the insertion part, and
insert-molding the resin member is performed by placing the cutout of the insertion hole in the front of the gate.

3 . The method according to claim 1 , wherein
the terminal member includes a terminal outer flat-plate portion located outside the case member, the terminal outer flat-plate portion having a flat plate shape and including a planar terminal top surface, which is exposed outside, and the resin member includes a resin outer frame portion located outside the case member and formed in a frame shape that surrounds an outer periphery of the terminal outer flat-plate portion of the terminal member and is flush with the terminal top surface of the terminal outer flat-plate portion.

4 . The method according to claim 2 , wherein
the terminal member includes a terminal outer flat-plate portion located outside the case member, the terminal outer flat-plate portion having a flat plate shape and including a planar terminal top surface, which is exposed outside, and
the resin member includes a resin outer frame portion located outside the case member and formed in a frame shape that surrounds an outer periphery of the terminal outer flat-plate portion of the terminal member and is flush with the terminal top surface of the terminal outer flat-plate portion.

5 . The method according to claim 1 , wherein injecting the molten resin at a pressure to avoid the molten resin occupying a space between an upper surface of the terminal member and the molding mold.

Assignees

• Prime Planet Energy & Solutions Inc
• Toyota Motor Co Ltd
• Primearth Ev Energy Co Ltd
• Toyota Battery Co Ltd

Inventors

• Ehara Tsuyoshi
• Uchida Yozo
• Sato Yuki
• Tsuchiya Syoichi
• Asai Masataka
• Asano Tsuyoshi
• Uchimura Masahiro
• Matsumoto Shigeru
• Nagano Yasuaki

Classifications

• B29C45/14008

  Inserting articles into the mould (B29C45/14827 takes precedence) · CPC title

• B29C2045/14327

  anchoring by forcing the material to pass through a hole in the article · CPC title

• B29K2081/04

  Polysulfides, e.g. PPS, i.e. polyphenylene sulfide or derivatives thereof · CPC title

• B29L2031/7146

  Battery-cases · CPC title

• B29C45/14467

  Joining articles or parts of a single article (B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence) · CPC title