# US 2021/0242520 A1 · Laminate battery and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242520 A1 - Document ID: US20210242520A1 - Status: Published application - Kind: A1 - Application number: 17/116,018 - Filed: 2020-12-09 - Published: 2021-08-05 - Earliest claimed: 2020-02-04 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Seigo FUJISHIMA; Satoshi TABARA - Web page: https://patentgrep.com/patent/US20210242520A1 ## CPC - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - B30B 15/064: {with heating or cooling means} - B32B 3/26: characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} - B32B 15/085: comprising polyolefins - B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} - B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} - B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} - B32B 27/08: of synthetic resin - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE} - B32B 37/06: characterised by the heating method - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - 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 50/124: having a layered structure - H01M 50/133: Thickness - H01M 50/533: characterised by the shape of the leads or tabs - H01M 50/557: Plate-shaped terminals - B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure - B32B 2307/31: Heat sealable - B32B 2307/732: Dimensional properties - B32B 2457/10: Batteries - 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 - B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)} - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - 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 laminate battery includes an electrode body, an exterior body consisting of a pair of exterior films, and an electrode terminal. The exterior body has a film welded portion in which the exterior films are welded to each other, and a terminal welded portion in which the exterior films are welded to the electrode terminal. The electrode terminal is covered with a thermally weldable film, and the thermally weldable film has a protruding portion that protrudes from a side face of the electrode terminal outward in a depth direction. The length of the protruding portion is equal to or larger than 50% of the thickness of the terminal welded portion, and is smaller than 100% of the length of the film welded portion. ## Claims ### Claim 1 A laminate battery comprising: an electrode body: an exterior body having a pair of exterior films that are opposed to each other with the electrode body sandwiched between the exterior films; an electrode terminal having a plate shape, and having a first end portion connected to the electrode body and a second end portion exposed to an outside of the exterior body, as viewed in a width direction; and a thermally weldable film, wherein the exterior body has a welded portion in an outer peripheral portion, the welded portion including a film welded portion in which the exterior films are welded to each other, and a terminal welded portion in which the exterior films are welded to the electrode terminal, a surface of the electrode terminal disposed between the exterior films in the welded portion is covered with the thermally weldable film, and the thermally weldable film has a protruding portion that protrudes from a side face of the electrode terminal outward in a depth direction, and a length of the protruding portion of the thermally weldable film is equal to or larger than 50% of a thickness of the terminal welded portion, and is smaller than 100% of a length of the film welded portion. ### Claim 2 (depends on 1) The laminate battery according to claim 1, wherein a thickness of the protruding portion is equal to or larger than 20% and equal to or smaller than 50% of the thickness of the terminal welded portion. ### Claim 3 (depends on 1) The laminate battery according to claim 1, wherein the length of the protruding portion is equal to or larger than 35% and equal to or smaller than 65% of the length of the film welded portion. ### Claim 4 (depends on 1) The laminate battery according to claim 1, wherein each of the exterior films is a laminate film having a multi-layer structure including at least a resin layer opposed to the electrode body, and a metal layer formed on an outer side of the resin layer. ### Claim 5 (depends on 4) The laminate battery according to claim 4, wherein one end portion of the thermally weldable film as viewed in the width direction is exposed to an outside of the exterior body. ### Claim 6 A method of manufacturing a laminate battery including an electrode body, an exterior body having a pair of exterior films that are opposed to each other with the electrode body sandwiched between the exterior films, an electrode terminal having a plate shape, and having a first end portion connected to the electrode body and a second end portion exposed to an outside of the exterior body, and a thermally weldable film that covers a surface of the electrode terminal disposed between the exterior films, the method comprising: forming a laminated body in which the electrode body to which the electrode terminal is connected is disposed between the exterior films, and the second end portion of the electrode terminal is exposed to an outside of the exterior films, while the surface of the electrode terminal disposed between the exterior films is covered with the thermally weldable film; placing an end portion of the laminated body in which the electrode terminal is interposed between the exterior films, between a pair of pressure plates; heating the pressure plates to a predetermined temperature; and forming a welded portion by sandwiching the end portion of the laminated body between the heated pressure plates, to pressurize and heat the end portion, the welded portion including a film welded portion in which the exterior films are welded to each other, and a terminal welded portion in which the exterior films are welded to the electrode terminal, wherein the thermally weldable film has a protruding portion that protrudes from a side face of the electrode terminal in a depth direction, and wherein a length of the protruding portion is equal to or larger than 50% of a thickness of the terminal welded portion, and is smaller than 100% of a length of the film welded portion.