Manufacturing method of top cover assembly, top cover assembly and energy storage device

Patent metadata

Field	Value
Publication number	US-2024162542-A1
Application number	US-202318232627-A
Country	US
Kind code	A1
Filing date	Aug 10, 2023
Priority date	Nov 11, 2022
Publication date	May 16, 2024
Grant date	—

Abstract

A manufacturing method of a top cover assembly, a top cover assembly and an energy storage device are provided. The method includes: providing a top cover plate, which is provided with an outlet hole; placing an electrode terminal above one side of the top cover plate to cover the outlet hole, so that a first space is defined between the top cover plate and the electrode terminal; placing a connector on the side of the top cover plate that is used for placing the electrode terminal. The connector has a first end portion surrounding a peripheral surface of the electrode terminal, and the connector has a second end portion in contact with the top cover plate.

First claim

What is claimed is:

1 . A method for manufacturing a top cover assembly, the method comprising:
providing a top cover plate, wherein the top cover plate has an outlet hole; placing an electrode terminal above one side of the top cover plate, and covering the outlet hole with the electrode terminal to define a first space between the top cover plate and the electrode terminal; placing a connector on the one side of the top cover plate, wherein the connector has a first end portion surrounding a peripheral surface of the electrode terminal and a second end portion in contact with the top cover plate, wherein a second space is defined between the first end portion of the connector and the peripheral surface of the electrode terminal, wherein the second space is communicated with the first space; injecting a molten plastic material into the second space to fill the second space and the first space; standing for a time t to harden the molten plastic material to form an injection-molded member, thereby connecting the connector to the electrode terminal through the injection-molded member; and welding the second end portion of the connector to the top cover plate.

2 . The method according to claim 1 , wherein the injecting the molten plastic material into the second space to fill the second space and the first space comprises:
covering a peripheral side of the first end portion of the connector by an injection mold, so that the first end portion of the connector and the peripheral surface of the electrode terminal are located in an inner cavity of the injection mold, and the second end portion of the connector is exposed outside the inner cavity of the injection mold; and injecting the molten plastic material into the inner cavity of the injection mold through an injection hole of the injection mold to enable the molten plastic material to fill the second space and the first space.

3 . The method according to claim 2 , wherein the injecting the molten plastic material into the inner cavity of the injection mold through the injection hole of the injection mold to enable the molten plastic material to fill the second space and the first space comprises:
forming a third space between the first end portion of the connector and the injection mold, wherein the first end portion of the connector is provided with a through hole communicated with the second space and the third space; and injecting the molten plastic material into the inner cavity of the injection mold through the injection hole of the injection mold to enable the molten plastic material to fill the first space, the second space and the third space by flowing through the third space, the through hole, the second space and the first space in sequence.

4 . The method according to claim 2 , wherein the injecting the molten plastic material into the inner cavity of the injection mold through an injection hole of the injection mold comprises:
injecting the molten plastic material into the inner cavity of the injection mold at a preset speed through the injection hole of the injection mold, wherein the preset speed is in a range of 18 g/s to 25 g/s.

5 . The method according to claim 2 , wherein a volume of the molten plastic material injected into the inner cavity of the injection mold is V, wherein 1.4 cm 3 ≤V≤1.6 cm 3 .

6 . The method according to claim 1 , wherein the placing the electrode terminal above one side of the top cover plate, and covering the outlet hole with the electrode terminal to define the first space between the top cover plate and the electrode terminal comprises:
placing a sealing member surrounding the outlet hole on the one side of the top cover plate; and placing the electrode terminal on the sealing member and covering the outlet hole with the electrode terminal, so that the first space is defined between the top cover plate and the electrode terminal.

7 . The method according to claim 6 , wherein a thickness of the sealing member in a direction perpendicular to the top cover plate is greater than a width of the first space in the direction perpendicular to the top cover plate.

8 . The method according to claim 1 , wherein 1 min≤t≤3 min.

9 . The method according to claim 1 , wherein the molten plastic material is a molten polyphenylene sulfite (PPS) material.

10 . A top cover assembly, wherein the top cover assembly is manufactured by the method according to claim 1 .

11 . An energy storage device, comprising the top cover assembly according to claim 10 .

Assignees

• Shenzhen Hithium Energy Storage Control Tech Co Ltd
• Xiamen Hithium Energy Storage Tech Co Ltd

Inventors

• Liang Jinyun
• Zhang Liangliang
• Zhang Wancai
• Yang Ming

Classifications

• H01M50/166 Primary

  characterised by the methods of assembling casings with lids · 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

• H01M50/566

  by welding, soldering or brazing · CPC title

• B29L2031/3468

  Batteries, accumulators or fuel cells (battery cases B29L2031/7146) · CPC title

• H01M50/564 Primary

  characterised by their manufacturing process · CPC title