# US 2016/0260952 A1 · Connecting structure and method between grid and electrode tab of secondary battery

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2016/0260952 A1
- Document ID: US20160260952A1
- Status: Published application
- Kind: A1
- Application number: 14/982,175
- Filed: 2015-12-29
- Published: 2016-09-08
- Earliest claimed: 2015-03-04
- Assignees: Kokam Co., Ltd.
- Applicants: Kokam Co., Ltd.
- Inventors: Pan-Kyu Park; Ki-Hong Park; Ji-Jun Hong; Choong-Yeon Chong
- Web page: https://patentgrep.com/patent/US20160260952A1

## CPC

- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed is a connecting structure and method between a grid and an electrode tab of a secondary battery, which may ensure stable connection between the grid and the electrode tab of an electrode assembly and allow improved productivity. The connecting structure includes a grid integrally extending from an electrode plate of a secondary battery, an electrode tab connected to the grid, and a laser welding portion connecting the grid and the electrode tab. Also, a connecting method between a grid and an electrode tab of a secondary battery includes (a) fixing the grid with a jig, (b) cutting the grid, and (c) stacking the grid and the electrode tab and connecting the grid and the electrode tab by means of laser welding.

## Claims

### Claim 1

A connecting structure between a grid and an electrode tab of a secondary battery, comprising:
a grid integrally extending from an electrode plate of a secondary battery;
an electrode tab connected to the grid; and
a laser welding portion connecting the grid and the electrode tab.

### Claim 2 (depends on 1)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 1,
wherein the laser welding portion is formed with a predetermined pattern.

### Claim 3 (depends on 2)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 2,
wherein the predetermined pattern is any one selected from the group consisting of a linear pattern, a zigzag pattern and a wave pattern.

### Claim 4 (depends on 2)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 2,
wherein the predetermined pattern is formed with a plurality of welding lines.

### Claim 5 (depends on 1)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 1, further comprising:
a protecting member configured to surrounding the connection portion between the welding portion and the grid.

### Claim 6 (depends on 5)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 5,
wherein the protecting member is at least one selected from the group consisting of polyethylene, polypropylene and polyimide.

### Claim 7 (depends on 1)

The connecting structure between a grid and an electrode tab of a secondary battery according to claim 1,
wherein the electrode tab has a resin for facilitating sealing of a packing material.

### Claim 8

A connecting method between a grid and an electrode tab of a secondary battery, comprising:
(a) fixing the grid with a jig;
(b) cutting the grid; and
(c) stacking the grid and the electrode tab and connecting the grid and the electrode tab by means of laser welding.

### Claim 9 (depends on 8)

The connecting method between a grid and an electrode tab of a secondary battery according to claim 8, before the step (a), further comprising:
pre-welding the grid.

### Claim 10 (depends on 8)

The connecting method between a grid and an electrode tab of a secondary battery according to claim 8, after the step (b), further comprising:
stacking the electrode tab on the grid and aligning a location of the electrode tab.

### Claim 11 (depends on 8)

The connecting method between a grid and an electrode tab of a secondary battery according to claim 8,
wherein in the step (c), the laser welding forms a laser welding portion at a region where the grid and the electrode tab are stacked.

### Claim 12 (depends on 11)

The connecting method between a grid and an electrode tab of a secondary battery according to claim 11,
wherein the laser welding portion is formed to have a predetermined pattern repeatedly.

### Claim 13 (depends on 12)

The connecting method between a grid and an electrode tab of a secondary battery according to claim 12,
wherein the predetermined pattern is any one selected from the group consisting of a linear pattern, a zigzag pattern and a wave pattern.