# US 11,114,727 B2 · Power storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,727 B2 - Document ID: US11114727B2 - Status: Granted - Kind: B2 - Application number: 16/120,568 - Filed: 2018-09-04 - Published: 2018-12-27 - Granted: 2021-09-07 - Earliest claimed: 2016-03-14 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Hidetaka Shibata - Web page: https://patentgrep.com/patent/US11114727B2 ## CPC - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01G 11/22: Electrodes - H01G 11/38: Carbon pastes or blends; Binders or additives therein - H01G 11/52: Separators - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations - H01M 4/622: {being polymers} - H01M 10/0486: {Frames for plates or membranes} - H01M 10/049: {Processes for forming or storing electrodes in the battery container} - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/119: Metals - H01M 50/434: Ceramics - H01M 50/451: comprising layers of only organic material and layers containing inorganic material - H01G 11/58: Liquid electrolytes - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - 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) ## Abstract A power storage device includes a case, an electrode body, and an electrolyte. The electrode body is located in the case and has a positive electrode, a negative electrode, and a separator located between the positive and negative electrodes. The electrolytefills the case 2. A principal surface of the electrode body is connected to an inner surface of the case. ## Claims ### Claim 1 A power storage device comprising: a case; an electrode body located in the case, the electrode body having opposed first and second principal surfaces, the electrode body comprising a positive electrode, a negative electrode, and a separator located between the positive and negative electrodes; at least one tape which extends between the first and second principal surfaces to integrate the positive electrode, the negative electrode and the separator together, edges of the at least one tape cooperating with the first principal surface of the electrode body to define a recessed portion at the first principal surface; an electrically insulating bonding layer located in the recessed portion and bonding the electrode body to an inner surface of the case; and an electrolyte located in the case and contacting the electrode body. ### Claim 2 (depends on 1) The power storage device according to claim 1, wherein: the positive and negative electrodes contain a resin binder; and the bonding layer contains the same resin binder as the positive and negative electrodes. ### Claim 3 (depends on 2) The power storage device according to claim 2, wherein: a surface of the negative electrode defines at least a portion of the first principal surface of the electrode body is in contact with the bonding layer; and the resin binder contained in the negative electrode and the bonding layer contains SBR. ### Claim 4 (depends on 1) The power storage device according to claim 1, wherein the recessed portion is formed at a central portion of the first principal surface of the electrode body in a width direction of the case. ### Claim 5 (depends on 1) The power storage device according to claim 1, wherein the bonding layer does not have corners in plan view. ### Claim 6 (depends on 1) The power storage device according to claim 1, wherein the case is an electrical conductor. ### Claim 7 (depends on 1) The power storage device according to claim 1, wherein a surface of the separator is covered with a ceramic coating layer. ### Claim 8 (depends on 1) The power storage device according to claim 1, wherein the electrolyte impregnates the electrode body. ### Claim 9 A power storage device comprising: a case; an electrode body located in the case, the electrode body comprising a plurality of positive electrode, negative electrode pairs and a separator located between each positive electrode, negative electrode pair, a principal surface of the electrode body being connected to an inner surface of the case, the positive and negative electrodes containing a resin binder the electrode body and the inner surface of the case being bonded together by a bonding layer which contains the same resin binder as the positive and negative electrodes; and an electrolyte located in the case and contacting the electrode body. ### Claim 10 (depends on 9) The power storage device according to claim 9, further comprising at least one tape which contacts a plurality of the separators. ### Claim 11 (depends on 10) The power storage device according to claim 10, wherein the at least one tape comprises a first tape that contacts respective first edges of the separators and a second tape which contacts respective second edges of the separators. ### Claim 12 (depends on 11) The power storage device according to claim 11, wherein each of the first edges are on a first lateral side of the electrode body and each of the second edges are on a second lateral side of the electrode body opposite to the first lateral side. ### Claim 13 (depends on 9) The power storage device according to claim 9, wherein: one of the negative electrodes faces the inner surface of the case and is in contact with the bonding layer; and the binder contained in the negative electrodes and the bonding layer contains SBR. ### Claim 14 (depends on 9) The power storage device according to claim 9, wherein the bonding layer does not have corners in plan view. ### Claim 15 (depends on 9) The power storage device according to claim 9, wherein the case is an electrical conductor. ### Claim 16 (depends on 9) The power storage device according to claim 9, wherein a surface of the separators is covered with a ceramic coating layer. ### Claim 17 (depends on 1) The power storage device according to claim 1, wherein the bonding layer fixes the electrode body to the inner surface of the case in such a manner that the electrode body is not free to move laterally relative to the case. ### Claim 18 (depends on 1) The power storage device according to claim 1, wherein the electrolyte impregnates the separator.