# US 2026/0066485 A1 · Electrode assembly, secondary battery, and battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0066485 A1 - Document ID: US20260066485A1 - Status: Published application - Kind: A1 - Application number: 19/066,827 - Filed: 2025-02-28 - Published: 2026-03-05 - Earliest claimed: 2024-08-28 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Heyoung Cheoul ROH; Jun Sun YONG; Jun Hyung LEE; Kwang Soo BAE; Ji Hwan KIM; Chae Eun BAE; Jung Woo LEE; Mi Sol KIM; Se Eun PARK; Ji Hwan YOON - Web page: https://patentgrep.com/patent/US20260066485A1 ## CPC - H01M 50/533: characterised by the shape of the leads or tabs - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence) - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 50/54: Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges - 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 An electrode assembly, a secondary battery, and a battery pack are disclosed. An electrode assembly includes a first electrode, a second electrode facing the first electrode along a first direction, a negative electrode tab extending from the first electrode and bent in the first direction or in a direction opposite to the first direction, and a positive electrode tab extending from the second electrode and bent in the first direction or in the direction opposite to the first direction. ## Claims ### Claim 1 An electrode assembly comprising: a first electrode; a second electrode facing the first electrode along a first direction; a negative electrode tab extending from the first electrode and bent in the first direction or in a direction opposite to the first direction; and a positive electrode tab extending from the second electrode and bent in the first direction or in the direction opposite to the first direction. ### Claim 2 (depends on 1) The electrode assembly as claimed in claim 1, wherein the negative electrode tab and the positive electrode tab are bent in opposite directions. ### Claim 3 (depends on 1) The electrode assembly as claimed in claim 1, wherein the negative electrode tab extends from the first electrode along a second direction intersecting the first direction. ### Claim 4 (depends on 3) The electrode assembly as claimed in claim 3, wherein the negative electrode tab comprises: a first negative electrode tab; and a second negative electrode tab spaced apart from the first negative electrode tab. ### Claim 5 (depends on 4) The electrode assembly as claimed in claim 4, wherein the first negative electrode tab and the second negative electrode tab are spaced apart from each other along a third direction intersecting the first direction and the second direction. ### Claim 6 (depends on 4) The electrode assembly as claimed in claim 4, wherein the first negative electrode tab is bent in the first direction or in the direction opposite to the first direction, and the second negative electrode tab is bent in the first direction or in the direction opposite to the first direction. ### Claim 7 (depends on 6) The electrode assembly as claimed in claim 6, wherein the first negative electrode tab and the second negative electrode tab are bent in opposite directions. ### Claim 8 (depends on 4) The electrode assembly as claimed in claim 4, wherein the positive electrode tab extends from the second electrode along the second direction. ### Claim 9 (depends on 8) The electrode assembly as claimed in claim 8, wherein the positive electrode tab comprises: a first positive electrode tab; and a second positive electrode tab spaced apart from the first positive electrode tab. ### Claim 10 (depends on 9) The electrode assembly as claimed in claim 9, wherein the first positive electrode tab and the second positive electrode tab are spaced apart from each other along a third direction intersecting the first direction and the second direction. ### Claim 11 (depends on 9) The electrode assembly as claimed in claim 9, wherein the first positive electrode tab is bent in the first direction or in the direction opposite to the first direction, and the second positive electrode tab is bent in the first direction or in the direction opposite to the first direction. ### Claim 12 (depends on 11) The electrode assembly as claimed in claim 11, wherein the first positive electrode tab and the second positive electrode tab are bent in opposite directions. ### Claim 13 (depends on 9) The electrode assembly as claimed in claim 9, wherein the second negative electrode tab is located between the first negative electrode tab and the first positive electrode tab. ### Claim 14 (depends on 9) The electrode assembly as claimed in claim 9, wherein the first positive electrode tab is located between the second negative electrode tab and the second positive electrode tab. ### Claim 15 (depends on 9) The electrode assembly as claimed in claim 9, wherein the second negative electrode tab and the first positive electrode tab are located between the first negative electrode tab and the second positive electrode tab. ### Claim 16 A secondary battery comprising: a case; an electrode assembly accommodated in the case and comprising a negative electrode tab and a positive electrode tab that are bent in opposite directions; a cap assembly facing the electrode assembly and comprising a first terminal and a second terminal; a first connection member between the electrode assembly and the cap assembly and connected to the first terminal and the negative electrode tab; and a second connection member between the electrode assembly and the cap assembly and connected to the second terminal and the positive electrode tab. ### Claim 17 (depends on 16) The secondary battery as claimed in claim 16, wherein the negative electrode tab comprises a first negative electrode tab and a second negative electrode tab extending from the electrode assembly and bent in opposite directions, and the positive electrode tab comprises a first positive electrode tab and a second positive electrode tab extending from the electrode assembly and bent in opposite directions. ### Claim 18 (depends on 17) The secondary battery as claimed in claim 17, wherein the first connection member comprises: a first current collector connected to the first terminal; a first negative electrode tab plate connected to the first negative electrode tab; and a second negative electrode tab plate connected to the second negative electrode tab. ### Claim 19 (depends on 17) The secondary battery as claimed in claim 17, wherein the second connection member comprises: a second current collector connected to the second terminal; a first positive electrode tab plate connected to the first positive electrode tab; and a second positive electrode tab plate connected to the second positive electrode tab. ### Claim 20 A battery pack comprising: a housing; and a plurality of secondary batteries accommodated in the housing, wherein each of the secondary batteries comprises: a case; an electrode assembly accommodated in the case and comprising a negative electrode tab and a positive electrode tab that are bent in opposite directions; a cap assembly facing the electrode assembly and comprising a first terminal and a second terminal; a first connection member between the electrode assembly and the cap assembly and connected to the first terminal and the negative electrode tab; and a second connection member between the electrode assembly and the cap assembly and connected to the second terminal and the positive electrode tab.