# US 2021/0242539 A1 · Electrode assembly and battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242539 A1 - Document ID: US20210242539A1 - Status: Published application - Kind: A1 - Application number: 17/235,765 - Filed: 2021-04-20 - Published: 2021-08-05 - Earliest claimed: 2018-02-09 - Assignees: Ningde Amperex Technology Limited - Applicants: Ningde Amperex Technology Limited - Inventors: Weimin JIAO; Junhui Hou; Houlei Cui; Yinli Lin; Hui Dong; Zhiwen Xiao - Web page: https://patentgrep.com/patent/US20210242539A1 ## CPC - H01M 10/0459: {Cells or batteries with folded separator between plate-like electrodes} - H01M 50/461: {with adhesive layers between electrodes and separators} - H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) - H01M 10/05: Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) - H01M 10/0583: of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 50/105: Pouches or flexible bags - H01M 50/463: Separators, membranes or diaphragms characterised by their shape - 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 electrode assembly including a first electrode plate, a second electrode plate and a separator between the first electrode plate and the second electrode plate. The separator includes an extension portion extending to the outside of the first electrode plate and the second electrode plate in a length direction of the electrode assembly. The extension portion is provided with a glue layer including a first bonding portion extending in a width direction of the electrode assembly. The first bonding portion is parallel to the width direction. ## Claims ### Claim 1 An electrode assembly, comprising: a first electrode plate, a second electrode plate, and a separator disposed therebetween; wherein the separator comprises an extension portion extending beyond the first electrode plate and the second electrode plate in a length direction of the electrode assembly; and the extension portion is provided with a glue layer, and the glue layer is configured in a wave structure in a width direction of the electrode assembly. ### Claim 2 (depends on 1) The electrode assembly according to claim 1, wherein the glue layer comprises a first bonding portion extending in the width direction of the electrode assembly, and bonded to the extension portion. ### Claim 3 (depends on 2) The electrode assembly according to claim 2, wherein in a thickness direction of the electrode assembly, the extension portion comprises a first layer and a second layer; the first layer and the second layer are disposed on the outermost sides of the separator respectively, and the first bonding portion is disposed on the first layer. ### Claim 4 (depends on 3) The electrode assembly according to claim 3, wherein the glue layer further comprises a second bonding portion extending in the width direction of the electrode assembly, and the second bonding portion is disposed on the second layer and bonded to the extension portion. ### Claim 5 (depends on 3) The electrode assembly according to claim 3, wherein in the thickness direction of the electrode assembly, the extension portion further comprises a third layer disposed between the first layer and the second layer; the glue layer further comprises a third bonding portion extending in the width direction of the electrode assembly; and the third bonding portion is disposed on the third layer and bonded to the extension portion. ### Claim 6 (depends on 4) The electrode assembly according to claim 4, wherein in the thickness direction of the electrode assembly, the extension portion further comprises a third layer disposed between the first layer and the second layer; the glue layer further comprises a third bonding portion extending in a width direction of the electrode assembly; and the third bonding portion is disposed on the third layer and bonded to the extension portion. ### Claim 7 (depends on 4) The electrode assembly according to claim 4, wherein the glue layer further comprises a fourth bonding portion bonded to the extension portion, connecting at least one of the first bonding portion or the second bonding portion, and an angle between the fourth bonding portion and the width direction of the electrode assembly is greater than 0 degrees and less than 180 degrees. ### Claim 8 (depends on 5) The electrode assembly according to claim 5, wherein the glue layer further comprises a fourth bonding portion bonded to the extension portion, connecting at least one of the first bonding portion or the third bonding portion, and an angle between the fourth bonding portion and the width direction of the electrode assembly is greater than 0 degrees and less than 180 degrees. ### Claim 9 (depends on 4) The electrode assembly according to claim 4, wherein the glue layer further comprises a fourth bonding portion bonded to the extension portion, configured in a curve structure and connecting at least one of the first bonding portion or the third bonding portion. ### Claim 10 (depends on 1) The electrode assembly according to claim 1, wherein the glue layer is configured in a discontinuous wave structure. ### Claim 11 (depends on 1) The electrode assembly according to claim 1, wherein in a thickness direction of the electrode assembly, the electrode assembly comprises a first surface and a second surface; and the electrode assembly further comprises four sides connecting the first surface and the second surface, and the glue layer is disposed on at least one of the four sides. ### Claim 12 (depends on 11) The electrode assembly according to claim 11, wherein in the thickness direction of the electrode assembly, the first electrode plate, the separator, and the second electrode plate are laminated; and at one side of the electrode assembly in the width direction of the electrode assembly, two adjacent layers of the separator are integrally formed; and the glue layer is disposed on at least one of two sides in the length direction of the electrode assembly. ### Claim 13 A battery, comprising an electrode assembly, and a housing accommodating the electrode assembly; wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed therebetween; wherein the separator comprises an extension portion extending beyond the first electrode plate and the second electrode plate in a length direction of the electrode assembly; and the extension portion is provided with a glue layer, and the glue layer is configured in a wave structure in the width direction of the electrode assembly. ### Claim 14 (depends on 13) The battery according to claim 13, wherein the glue layer comprises a first bonding portion extending in a width direction of the electrode assembly, and bonded to the extension portion. ### Claim 15 (depends on 14) The battery according to claim 14, wherein in a thickness direction of the electrode assembly, the extension portion comprises a first layer and a second layer disposed on the outermost sides of the separator respectively, and the first bonding portion is disposed on the first layer. ### Claim 16 (depends on 15) The battery according to claim 15, wherein the glue layer further comprises a second bonding portion extending in the width direction of the electrode assembly, and the second bonding portion is disposed on the second layer and bonded to the extension portion. ### Claim 17 (depends on 16) The battery according to claim 16, wherein the glue layer further comprises a fourth bonding portion, configured in a curve structure and connecting at least one of the first bonding portion or the third bonding portion. ### Claim 18 (depends on 13) The battery according to claim 13, wherein the glue layer is configured in a discontinuous wave structure. ### Claim 19 (depends on 13) The battery according to claim 13, wherein in a thickness direction of the electrode assembly, the electrode assembly comprises a first surface and a second surface; and the electrode assembly further comprises four sides connecting the first surface and the second surface, and the glue layer is disposed on at least one of the four sides. ### Claim 20 (depends on 19) The battery according to claim 19, wherein in the thickness direction of the electrode assembly, the first electrode plate, the separator, and the second electrode plate are laminated; and at one side of the electrode assembly in the width direction of the electrode assembly, two adjacent layers of the separator are integrally formed; and the glue layer is disposed on at least one of two sides in the length direction of the electrode assembly.