US-12620681-B2 - Battery

US12620681B2US 12620681 B2US12620681 B2US 12620681B2US-12620681-B2

Abstract

A battery includes a cell including an electrode, an electrode tab connected to the electrode, and a dummy tab protruding outwardly from the cell farther than the electrode tab. The dummy tab prevents a short circuit between first and second electrodes of the cell to prevent an accident, such as an overcurrent, overheating, and fire.

Inventors

Sanghun Park

Assignees

SAMSUNG SDI CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20220412
Priority Date: 20210413

Claims (20)

1 . A battery comprising: a cell comprising a first electrode and a second electrode; an electrode tab connected, via its proximal end, to one of the first electrode and the second electrode; and an electrically conductive dummy tab connected, via its proximal end, to the cell and protruding outwardly from the cell farther than the electrode tab, wherein a distal end of the electrode tab is spaced apart from the dummy tab.
2 . The battery of claim 1 , wherein the first electrode is on a first surface of the cell, and wherein the second electrode is on a second surface of the cell, the first and second surfaces being opposite each other in a first direction.
3 . The battery of claim 2 , wherein the electrode tab is a first electrode tab connected to the first electrode, and wherein the cell further comprises a second electrode tab connected to the second electrode.
4 . The battery of claim 3 , wherein the dummy tab protrudes outwardly from the cell farther than the first and second electrode tabs.
5 . The battery of claim 3 , wherein the dummy tab extends parallel with the first and second electrode tabs in a second direction crossing the first direction, and wherein the dummy tab protrudes outwardly from the cell in the second direction farther than the first and second electrode tabs.
6 . The battery of claim 3 , wherein the dummy tab is on at least one of the first surface and the second surface.
7 . The battery of claim 6 , wherein the dummy tab is on the first surface or the second surface together with the first electrode tab or the second electrode tab.
8 . The battery of claim 3 , wherein the first electrode is at a center position of the first surface, and wherein the second electrode is entirely on the second surface and a lateral surface extending between the first and second surfaces and extends from the lateral surface to a peripheral region extending around a periphery of the center position of the first surface.
9 . The battery of claim 8 , wherein the dummy tab is on the second surface together with the second electrode tab.
10 . The battery of claim 3 , wherein the first and second electrode tabs and the dummy tab each has an outer end portion respectively provided at different heights in the first direction.
11 . The battery of claim 10 , wherein the outer end portion of the second electrode tab is at a height between the outer end portion of the first electrode tab and the outer end portion of the dummy tab in the first direction.
12 . The battery of claim 10 , wherein the outer end portions of the first and second electrode tabs and the dummy tab protrude outwardly from the cell in parallel with each other.
13 . The battery of claim 10 , wherein the second electrode tab comprises: a first bent portion bent at a position away from the second surface along a lateral surface of the cell in the first direction toward the first surface; and a second bent portion on the lateral surface of the cell together with the first bent portion and bent in a second direction to form the outer end portion of the second electrode tab at a height between the first surface and the second surface.
14 . The battery of claim 3 , wherein the first and second electrode tabs respectively comprise: first and second coupling portions coupled to the first and second surfaces; and first and second lead-out portions extending outwardly from the cell from the first and second coupling portions.
15 . The battery of claim 14 , wherein the first and second coupling portions and the first and second lead-out portions extend in different directions.
16 . The battery of claim 14 , wherein the dummy tab comprises a pair of dummy tabs provided on both sides of the second lead-out portion.
17 . The battery of claim 14 , wherein the dummy tab and the second lead-out portion of the second electrode tab extend parallel to each other, and wherein the dummy tab is shorter than the second lead-out portion.
18 . The battery of claim 14 , wherein the dummy tab is on the second surface of the cell together with the second electrode tab, and wherein the second electrode tab further comprises a fixing portion protruding from the second coupling portion toward the dummy tab.
19 . The battery of claim 18 , wherein the dummy tab and the fixing portion are arranged in a line, and wherein the dummy tab and the fixing portion are separated by a separation gap.
20 . The battery of claim 18 , wherein the dummy tab is fixed to the second surface of the cell by a fixing member, the fixing member being attached to the second surface across a portion of the dummy tab, a portion of the second lead-out portion, and a portion of the fixing portion.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0048018, filed on Apr. 13, 2021, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field Aspects of embodiments of the present disclosure relate to a battery. 2. Description of the Related Art Generally, secondary (or rechargeable) batteries refer to batteries that are designed to be repeatedly discharged and recharged, different from non-rechargeable (or primary) batteries. Secondary batteries are used as energy sources of devices such as mobile devices, electric vehicles, hybrid vehicles, electric bicycles, or uninterruptible power supplies. Secondary batteries may be used individually or in secondary battery modules including a plurality of secondary batteries connected together according to the type of external device to be powered. SUMMARY Embodiments of the present disclosures include a battery configured to prevent a short circuit between first and second electrodes to prevent accidents, such as an overcurrent, overheating, and fire. Additional aspects and features of the present disclosure will be set forth, in part, in the description which follows and, in part, will be apparent from the description or may be learned by practice of the described embodiments of the present disclosure. According to an embodiment of the present disclosure, a battery includes: a cell including an electrode; an electrode tab connected to the electrode; and a dummy tab protruding outwardly from the cell farther than the electrode tab. The cell may include first and second electrodes respectively on first and second surfaces, which may be opposite each other in a first direction. The electrode tab may include first and second electrode tabs respectively connected to the first and second electrodes. The dummy tab may protrude outwardly from the cell farther than the first and second electrode tabs. The dummy tab may extend parallel with the first and second electrode tabs in a second direction crossing the first direction, and the dummy tab may protrude outwardly from the cell in the second direction farther than the first and second electrode tabs. The dummy tab may be on at least one of the first surface and the second surface. The dummy tab may be on the first surface or the second surface together with the first electrode tab or the second electrode tab. The first electrode may be at a center position of the first surface, and the second electrode may be entirely on the second surface and a lateral surface extending between the first and second surfaces and may extend from the lateral surface to a peripheral region extending around a periphery of the center position of the first surface. The dummy tab may be on the second surface together with the second electrode tab. The first and second electrode tabs and the dummy tab may each have an outer end portion, which are respectively provided at different heights in the first direction. The outer end portion of the second electrode tab may be at a height between the outer end portion of the first electrode tab and the outer end portion of the dummy tab in the first direction. The outer end portions of the first and second electrode tabs and the dummy tab may protrude outwardly from the cell in parallel with each other. The second electrode tab may include: a first bent portion bent at a position away from the second surface along a lateral surface of the cell in the first direction toward the first surface; and a second bent portion on the lateral surface of the cell together with the first bent portion and bent in a second direction to form the outer end portion of the second electrode tab at a height between the first surface and the second surface. The first and second electrode tabs respectively may include: first and second coupling portions coupled to the first and second surfaces; and first and second lead-out portions extending outwardly of the cell from the first and second coupling portions. The first and second coupling portions and the first and second lead-out portions may extend in different directions. The dummy tab may include a pair of dummy tabs on both sides of the second lead-out portion. The dummy tab and the lead-out portion of the second electrode tab may extend in parallel with each other, and the dummy tab may be shorter than the second lead-out portion. The dummy tab may be on the second surface of the cell together with the second electrode tab, and the second electrode tab further may include a fixing portion protruding from the second coupling portion toward the dummy tab. The dummy tab and the fixing portion may be arranged in a line, and the dummy tab and the fixing portion may be separated by a separation gap. The dummy tab may be fixed to the second surface of the cell by a fixing member that is attached to the second surface a