# US 12,218,302 B2 · Rechargeable battery and pack of the same

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- Number: US 12,218,302 B2
- Document ID: US12218302B2
- Status: Granted
- Kind: B2
- Application number: 17/402,423
- Filed: 2021-08-13
- Published: 2021-12-02
- Granted: 2025-02-04
- Earliest claimed: 2015-01-14
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Hyun-Soo Lee; Jeong-Won Oh; Sang-Shin Choi
- Web page: https://patentgrep.com/patent/US12218302B2

## CPC

- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 10/045: {Cells or batteries with folded plate-like electrodes}
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/516: by welding, soldering or brazing
- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- H01M 50/55: on the same side of the cell
- H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An aspect of the present invention provides a rechargeable battery which makes placement of the electrode assembly in the case during assembly easy. The rechargeable battery includes an electrode assembly including a first electrode, a separator, and a second electrode, a case housing the electrode assembly and having an opening in a plane parallel to a flat side surface of the electrode assembly, the case being electrically connected to the first electrode, a cover closing the opening in the case, and an electrode terminal mounted to a terminal opening in the case and connected to the second electrode, wherein the electrode terminal and the second electrode are insulated from the case.

## Claims

### Claim 1

A rechargeable battery pack comprising:
a plurality of unit cells, each one of the unit cells having an electrode assembly with a first electrode electrically connected to a case, the case having an opening in a plane parallel to a flat side surface of the electrode assembly, and a second electrode electrically connected to an electrode terminal, the electrode terminal extending away from the case and insulated from the case; and
a bus bar connected between the electrode terminal of a first unit cell of the unit cells and the case of a second unit cell of the unit cells with the electrode terminal of the first unit cell having a height that is different from a height of the case of the second unit cell, wherein the bus bar includes a first raised portion and a second portion bent away from the first raised portion, wherein the first raised portion is connected to the electrode terminal of the first unit cell, and the second portion is directly connected to a wall of the case of the second unit cell,
wherein the wall protrudes inward towards an interior of the second unit cell and generates a bus bar connection recess on an exterior of the wall, wherein the second portion of the bus bar is connected to the bus bar connection recess.

### Claim 2 (depends on 1)

The rechargeable battery pack of claim 1, wherein the case of at least the second unit cell comprises a first long side wall, a second long side wall, a first short side wall and a second short side wall, the first long side wall, the second long side wall, the first short side wall, and the second short side wall each connected to a bottom of the case, thereby forming the opening, the opening being opposite to the bottom, wherein the second portion of the bus bar is connected to the first long side wall of the case of the second unit cell.

### Claim 3 (depends on 2)

The rechargeable battery pack of claim 2, wherein the bus bar connection recess is located on an exterior of the first long side wall.

### Claim 4 (depends on 2)

The rechargeable battery pack of claim 2, wherein the second portion of the bus bar is connected to the first long side wall of the case of the second unit cell by welding.