# US 10,483,518 B2 · Secondary battery including pull tab protruding from bottom

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- Number: US 10,483,518 B2
- Document ID: US10483518B2
- Status: Granted
- Kind: B2
- Application number: 15/638,759
- Filed: 2017-06-30
- Published: 2018-01-11
- Granted: 2019-11-19
- Earliest claimed: 2016-07-11
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Sangdo Hur
- Web page: https://patentgrep.com/patent/US10483518B2

## CPC

- H01M 50/529: Intercell connections through partitions, e.g. in a battery casing
- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 50/202: Casings or frames around the primary casing of a single cell or a single battery
- H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries}
- H01M 50/147: Lids or covers
- 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

A secondary battery includes a battery cell, a protection circuit module electrically connected to the battery cell, a top case covering the protection circuit module, and a bottom case covering a bottom surface of the battery cell. The bottom case includes a pull tab protruding to an outside of the bottom case.

## Claims

### Claim 1

A secondary battery, comprising:
a battery cell;
a protection circuit module electrically connected to the battery cell;
a top case covering the protection circuit module;
a bottom case covering a bottom surface of the battery cell, the bottom case including a penetration groove located at a center of a bottom surface of the bottom case, and
a pull tab that includes a first region of the pull tab that protrudes to an outside of the bottom case, a second region of the pull tab inside the bottom case, the second region of the pull tab being between a first region of an upper surface of a bottom portion of the bottom case and the bottom surface of the battery cell, and a third region of the pull tab that passes through the penetration groove, the third region of the pull tab being between the first region of the pull tab and the second region of the pull tab.

### Claim 2 (depends on 1)

The secondary battery as claimed in claim 1, wherein at least one of the first region of the pull tab and the third region of the pull tab has flexibility.

### Claim 3 (depends on 1)

The secondary battery as claimed in claim 1, wherein the upper surface of the bottom portion of the bottom case has a stepped part such that the first region of the bottom portion of the bottom case has an upper surface that is lower than an upper surface of a second region of the bottom surface of the bottom case, the penetration groove being between the first region of the bottom surface of the bottom case and the second region of the bottom surface of the bottom case.

### Claim 4 (depends on 3)

The secondary battery as claimed in claim 3, wherein:
the stepped part has a depth corresponding to a thickness of the pull tab, and
the second region of the pull tab is adhered to the upper surface of the first region of the bottom portion of the bottom case.

### Claim 5 (depends on 1)

The secondary battery as claimed in claim 1, wherein the bottom case further includes a pair of adhered parts extending from opposite long side regions in a vertical direction with respect to the bottom surface of the bottom case, the pair of adhered parts being asymmetrical with each other.

### Claim 6 (depends on 5)

The secondary battery as claimed in claim 5, wherein a zig groove is located in one adhered part of the pair of adhered parts.

### Claim 7 (depends on 6)

The secondary battery as claimed in claim 6, wherein the zig groove located in the one adhered part is a semicircular groove that extends from a first end of the adhered part toward the bottom surface of the bottom case.