Terminal for a secondary cell and a terminal rivet

Patent metadata

Field	Value
Publication number	US-11450933-B2
Application number	US-202117457180-A
Country	US
Kind code	B2
Filing date	Dec 1, 2021
Priority date	Dec 28, 2020
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

This disclosure presents a terminal (30) for a secondary cell (40). The terminal (30) comprises a terminal plate (20) comprising a through-hole (21) and an inner surface (23) adapted to face the interior of the secondary cell (40). The terminal (30) further comprises a terminal rivet (1) that extends through the through-hole (21) of the terminal plate (20). The terminal rivet (1) comprises a first flange (6) that comprises a protruding portion (7), and the protruding portion (7) extends into the inner surface (23) of the terminal plate (20) in a riveted state (1b). The disclosure also presents a terminal rivet (1).

First claim

The invention claimed is:

1. A terminal for a secondary cell, the terminal comprising:
a terminal plate comprising a through-hole and an inner surface adapted to face the interior of the secondary cell, and
a terminal rivet that extends through the through-hole of the terminal plate, wherein the terminal rivet comprises a first flange that comprises a protruding portion extending a distance above a remaining surface portion of the first flange,
wherein the protruding portion of the first flange extends into the inner surface of the terminal plate in a riveted state.

2. The terminal of claim 1 , wherein the protruding portion and the terminal plate are plastically deformed in the riveted state.

3. The terminal of claim 2 , wherein, in the riveted state, the protruding portion is arranged radially outside a portion of the terminal plate with respect to a central axis of the terminal rivet.

4. The terminal of claim 2 , wherein the protruding portion is arranged at a radial distance from the inner circumference of the first flange.

5. The terminal of claim 4 , wherein the terminal rivet comprises a first shaft portion that extends through the through-hole of the terminal plate and a second shaft portion that forms the first flange.

6. The terminal of claim 5 , wherein:
the terminal comprises a gasket through which the second shaft portion extends, wherein the gasket is configured to electrically insulate the terminal rivet from a cell lid of the secondary cell, and
the terminal rivet further comprises a second flange that is configured to abut against the gasket.

7. The terminal of claim 5 , wherein the first and second shaft portions are made from the same metal.

8. The terminal of claim 7 , wherein the first and second shaft portions are made of copper or a copper alloy and the terminal plate is made of aluminium or an aluminium alloy.

9. The terminal of claim 1 , wherein the terminal is an anode terminal.

10. The terminal of claim 1 , wherein the protruding portion is annular in shape.

11. The terminal of claim 10 , wherein the protruding portion consists of several discrete parts.

12. The terminal of claim 10 , wherein the protruding portion is arranged at a radially outer edge of the first flange.

13. The terminal of claim 1 , wherein the protruding portion is in direct contact with the terminal plate.

14. A secondary cell comprising a terminal of claim 1 .

Assignees

• Northvolt Ab

Inventors

• Jang Myungjae

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• F16B19/1027

  Multi-part rivets · CPC title

• H01M50/567 Primary

  by fixing means, e.g. screws, rivets or bolts · CPC title

• F16B5/04

  by means of riveting (rivets F16B19/04) · CPC title

• H01M50/188

  the sealing members being arranged between the lid and terminal · CPC title