# US 2021/0280948 A1 · Electricity storage device and method for manufacturing electricity storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280948 A1 - Document ID: US20210280948A1 - Status: Published application - Kind: A1 - Application number: 16/326,491 - Filed: 2017-06-20 - Published: 2021-09-09 - Earliest claimed: 2016-09-21 - Assignees: Kabushiki Kaisha Toyota Jidoshokki - Applicants: Kabushiki Kaisha Toyota Jidoshokki - Inventors: Kojiro TAMARU; Takayuki HIROSE; Atsuhiko NISHII; Satoshi ENDO; Tomohiro NAKAMURA - Web page: https://patentgrep.com/patent/US20210280948A1 ## CPC - H01G 11/10: Multiple hybrid or EDL capacitors, e.g. arrays or modules (housings, cases, encapsulations or mountings thereof H01G11/78) - H01M 50/474: characterised by their position inside the cells - H01G 11/12: Stacked hybrid or EDL capacitors - H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01G 11/80: Gaskets; Sealings - H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations - H01G 11/84: Processes for the manufacture of hybrid or EDL capacitors, or components thereof - H01M 10/0418: {with bipolar electrodes} - H01M 50/477: characterised by their shape - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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) - 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 electricity storage device according to one embodiment is an electricity storage device in which a plurality of bipolar electrodes in which a positive electrode layer is provided on one surface of a collector plate and a negative electrode layer is provided on the other surface of the collector plate are stacked via separators and includes a plurality of spacers arranged along peripheral edges of the collector plates between the respective collector plates adjacent to each other in a stacking direction and a resin frame covering outer peripheries of the plurality of spacers. ## Claims ### Claim at position 1 1-19. (canceled) ### Claim 20 An electricity storage device in which a plurality of electrodes in which a positive electrode layer is provided on one surface of a collector plate and a negative electrode layer is provided on the other surface of the collector plate are stacked via separators, the electricity storage device comprising: a plurality of spacers arranged along peripheral edges of the collector plates between the collector plates adjacent to each other in a stacking direction; and a resin frame covering outer peripheries of the plurality of spacers, wherein the spacer has a first portion overlapping with the resin frame when viewed from the stacking direction and a second portion extending inward from the resin frame when viewed from the stacking direction, wherein the first portion is bonded to the resin frame, wherein the second portion is bonded to the collector plate, and wherein the resin frame is formed by injection molding. ### Claim 21 (depends on 20) The electricity storage device according to claim 20, wherein the second portion does not overlap with any of the positive electrode layer and the negative electrode layer when viewed from the stacking direction, and wherein the second portion has a portion overlapping with the separator when viewed from the stacking direction. ### Claim 22 (depends on 20) The electricity storage device according to claim 20, wherein the spacer and the resin frame are formed with the same material. ### Claim 23 (depends on 20) The electricity storage device according to claim 20, wherein the spacer is formed in a frame shape when viewed from the stacking direction. ### Claim 24 (depends on 20) The electricity storage device according to claim 20, further comprising a connection portion connecting end portions of the spacers adjacent to each other in the stacking direction. ### Claim 25 (depends on 20) The electricity storage device according to claim 20, wherein a protrusion amount of the spacer from an end surface of the collector plate that faces in a direction intersecting the stacking direction is equal to or larger than a thickness of the spacer in the stacking direction. ### Claim 26 An electricity storage device in which a plurality of electrodes in which a positive electrode layer is provided on one surface of a collector plate and a negative electrode layer is provided on the other surface of the collector plate are stacked via separators, the electricity storage device comprising: a plurality of spacers arranged along peripheral edges of the collector plates between the collector plates adjacent to each other in a stacking direction; and a resin frame covering outer peripheries of the plurality of spacers, wherein an outer periphery of the collector plate is arranged in the resin frame, and wherein the outer periphery of the spacer has a convex shape toward the resin frame. ### Claim 27 (depends on 26) The electricity storage device according to claim 26, wherein the spacer and the resin frame are formed with the same material. ### Claim 28 (depends on 26) The electricity storage device according to claim 26, wherein the spacer and the resin frame are formed with different materials. ### Claim 29 (depends on 26) The electricity storage device according to claim 26, wherein a distal end of the outer periphery of the spacer extends to a position outside the outer periphery of the collector plate. ### Claim 30 (depends on 26) The electricity storage device according to claim 26, wherein an inner peripheral surface of the resin frame has a concave shape corresponding to the convex shape of the outer periphery of the spacer. ### Claim 31 (depends on 26) The electricity storage device according to claim 26, wherein an incision continuous from the outer periphery is formed on the peripheral edge of the collector plate. ### Claim 32 A method for manufacturing an electricity storage device, comprising processes of: fixing spacers to peripheral edges of collector plates in electrodes in which a positive electrode layer is provided on one surface of the collector plate and a negative electrode layer is provided on the other surface of the collector plate; stacking a plurality of electrodes to which the spacers are fixed; and forming a resin frame by injection molding or hot plate welding to the spacers so as to cover outer peripheries of the spacers fixed to the stacked plurality of electrodes. ### Claim 33 (depends on 32) The method for manufacturing an electricity storage device according to claim 32, further comprising a process of connecting end portions of the adjacent spacers before the process of forming the resin frame.