# US 2019/0198824 A1 · Electrochemical device and method for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0198824 A1 - Document ID: US20190198824A1 - Status: Published application - Kind: A1 - Application number: 16/230,774 - Filed: 2018-12-21 - Published: 2019-06-27 - Earliest claimed: 2017-12-22 - Assignees: Ningde Amperex Technology Limited - Applicants: Ningde Amperex Technology Limited - Inventors: Wenqiang CHENG - Web page: https://patentgrep.com/patent/US20190198824A1 ## CPC - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01M 10/0436: {Small-sized flat cells or batteries for portable equipment} - H01M 50/121: Organic material - H01M 50/124: having a layered structure - H01M 50/133: Thickness - H01G 9/08: Housing; Encapsulation - H01M 8/2475: Enclosures, casings or containers of fuel cell stacks - H01M 50/557: Plate-shaped terminals - Y02E 60/10: Energy storage using batteries - Y02E 60/50: Fuel cells - 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 - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - 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 The present application relates to an electrochemical device and a method for manufacturing the same. The electrochemical device includes: a first outer case defining an accommodating chamber therein; an electrode assembly accommodated in the accommodating chamber of the first outer case; and a second outer case including a heat shrinkable wrapping layer, the first outer case being wrapped in the heat shrinkable wrapping layer. ## Claims ### Claim 1 An electrochemical device, comprising: a first outer case defining an accommodating chamber therein; an electrode assembly accommodated in the accommodating chamber; and a second outer case comprising a heat shrinkable wrapping layer, and the first outer case being wrapped in the heat shrinkable wrapping layer. ### Claim 2 (depends on 1) The electrochemical device according to claim 1, wherein the first outer case comprises: a first body portion; and a second body portion arranged opposite to the first body portion, wherein the first body portion and the second body portion cooperatively define the accommodating chamber. ### Claim 3 (depends on 2) The electrochemical device according to claim 2, wherein the first body portion and the second body portion have a same size. ### Claim 4 (depends on 2) The electrochemical device according to claim 2, wherein at least one of the first body portion and the second body portion defines a groove, the second body portion is connected to the first body portion to shield the groove so as to define the accommodating chamber, and the electrode assembly is embedded in the groove. ### Claim 5 (depends on 4) The electrochemical device according to claim 4, wherein an edge of an opening of the groove is at a predetermined distance from an edge of the first outer case. ### Claim 6 (depends on 4) The electrochemical device according to claim 4, wherein each of the first body portion and the second body portion comprises a fusion layer, and the fusion layer of the first body potion is fused with the fusion layer of the second body portion. ### Claim 7 (depends on 6) The electrochemical device according to claim 6, wherein each of the first body portion and the second body portion further comprises a metal layer stacked outside the respective fusion layer. ### Claim 8 (depends on 1) The electrochemical device according to claim 1, wherein the first outer case is an integrally molded piece. ### Claim 9 (depends on 2) The electrochemical device according to claim 2, wherein the first body portion is integral with the second body portion. ### Claim 10 (depends on 6) The electrochemical device according to claim 6, wherein the fusion layer has a thickness of 20 to 90 μm. ### Claim 11 (depends on 7) The electrochemical device according to claim 7, wherein the metal layer has a thickness of 20 to 90 μm. ### Claim 12 (depends on 1) The electrochemical device according to claim 1, wherein the second outer case has a thickness of 10 to 110 μm. ### Claim 13 (depends on 1) The electrochemical device according to claim 1, wherein the second outer case comprises at least one selected from a group consisting of a resin layer and a rubber layer. ### Claim 14 (depends on 1) The electrochemical device according to claim 1, wherein the second outer case is a heat shrinkable tube. ### Claim 15 (depends on 1) The electrochemical device according to claim 1, wherein the electrochemical device is a pouch battery. ### Claim 16 A method for manufacturing an electrochemical device, comprising: selecting a first outer case, and sealing the first outer case to accommodate an electrode assembly; and arranging the first outer case accommodating the electrode assembly therein in a second outer case for heat treatment, such that the second outer case is shrunk and attached to a surface of the first outer case. ### Claim 17 (depends on 16) The method according to claim 16, wherein before the first outer case is sealed, one portion of the first outer case is molded and formed with a groove, the electrode assembly is placed in the groove, and the other portion, without being provided with the groove, of the first outer case is folded to shield the groove. ### Claim 18 (depends on 17) The method according to claim 17, wherein the one portion of the first outer case and the other portion of the first outer case each comprise a fusion layer, and the first outer case is sealed in such a way that the one portion of the first outer case is connected to the other portion of the first outer case by fusing the respective fusion layers together. ### Claim 19 (depends on 18) The method according to claim 18, wherein fused parts of the respective fusion layers are cut and folded towards a side wall of the electrode assembly. ### Claim 20 (depends on 17) The method according to claim 17, wherein the first outer case is sealed in such a further way that two open sides of the first outer case, which are not used for electrolyte injection, are sealed by a heat sealing device.