# US 7,410,725 B2 · Electrochemical energy storage device having improved enclosure arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,410,725 B2 - Document ID: US7410725B2 - Status: Granted - Kind: B2 - Application number: 10/939,793 - Filed: 2004-09-13 - Published: 2005-02-10 - Granted: 2008-08-12 - Earliest claimed: 1999-12-06 - Assignees: AVX Corporation - Inventors: Arieh Meitav; Joel Lang; Niles Fleischer; David Lifschitz; Eugene Pecherer; Eli Rosh Chodesh; Joost Manassen; Bharat Rawal - Web page: https://patentgrep.com/patent/US7410725B2 ## CPC - H01G 11/12: Stacked hybrid or EDL capacitors - H01G 9/012: specially adapted for solid capacitors - H01G 9/08: Housing; Encapsulation - H01G 9/14: Structural combinations {or circuits} for modifying, or compensating for, electric characteristics of electrolytic capacitors - H01G 11/68: characterised by their material - H01G 11/74: Terminals, e.g. extensions of current collectors - H01G 11/76: specially adapted for integration in multiple or stacked hybrid or EDL capacitors - 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 10/0418: {with bipolar electrodes} - H01M 10/044: {with bipolar electrodes} - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/119: Metals - H01M 50/124: having a layered structure - H01M 50/534: characterised by the material of the leads or tabs - H01M 50/545: formed by the casing of the cells (cup shaped terminals adapted for cells having curved cross-section H01M50/56) - H01G 9/28: Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices with other electric components not covered by this subclass - H01M 50/1245: {characterised by the external coating on the casing} - Y02E 60/10: Energy storage using batteries - Y02E 60/13: Energy storage using capacitors - Y10T 29/49108: Electric battery cell making - Y10T 29/4911: including sealing - Y10T 29/49115: including coating or impregnating - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An improved electrochemical single or multi-cell energy storage device and casing are provided. The casing may be a pair of U-shaped shells, a single foil piece or even a tube-shaped structure which encases the internal electrochemical cell stack. The energy storage device and casing advantageously exhibit low internal resistance, low ESR, a high voltage/capacity, and a low contact resistance between the internal stack and the outer casing. ## Claims ### Claim 1 An electrochemical energy storage device, comprising: a plurality of cells in series, said plurality of cells being electrically connected via a plurality of bi-polar current collectors and wherein said plurality of cells, said plurality of bi-polar current collectors and at least one terminal current collector are stacked to form a stacked assembly, said at least one terminal current collector extending laterally from said stacked assembly and providing a first external electrical contact; and a pre-formed metal sheet outer casing surrounding and electrically connected to said stacked assembly and serving as a second external electrical contact. ### Claim 2 (depends on 1) An electrochemical energy storage device as in claim 1, wherein said plurality of cells comprise at least one of a double-layer capacitor, a pseudo-capacitor, a battery or a combination thereof. ### Claim 3 (depends on 1) An electrochemical energy storage device as in claim 1, wherein said pre-formed metal sheet outer casing comprises stainless steel. ### Claim 4 (depends on 3) An electrochemical energy storage device as in claim 3, wherein said outer casing is coated with at least one conductive metal selected from the group consisting of gold, nickel, platinum, silver, lead, tin and brass. ### Claim 5 (depends on 1) An electrochemical energy storage device as in claim 1, wherein said terminal current collector comprises a carbon/plastic composite film coated on one or more selected sides thereof with a metallic film. ### Claim 6 (depends on 1) An electrochemical energy storage device as in claim 1, wherein said bi-polar current collector comprises a conductive polymer layer. ### Claim 7 (depends on 1) An electrochemical energy storage device as in claim 1, wherein said outer casing is partially bowed to impart a spring loading thereto. ### Claim 8 An electrochemical energy storage device, comprising: a stacked assembly comprising a first electrode, a first membrane, a second electrode, a bi-polar current collector, a third electrode, a second membrane, a fourth electrode, and a terminal current collector, said first electrode forming a first surface of said stacked assembly and said terminal current collector forming a second surface of said stacked assembly and extending laterally from said stacked assembly and providing a first external electrical contact for said energy storage device; a potting material coating selected portions of said stacked assembly; and a pre-formed metal sheet outer casing surrounding and electrically connected to the first electrode of said stacked assembly and serving as a second external electrical contact for said energy storage device. ### Claim 9 (depends on 8) An electrochemical energy storage device as in claim 8, wherein said terminal current collector comprises a carbon/plastic composite film coated on one or more selected sides thereof with a metallic film. ### Claim 10 (depends on 8) An electrochemical energy storage device as in claim 8, wherein said bi-polar current collector comprises a conductive polymer layer. ### Claim 11 (depends on 8) An electrochemical energy storage device as in claim 8, wherein said outer casing is partially bowed to impart a spring loading thereto. ### Claim 12 (depends on 8) An electrochemical energy storage device as in claim 8, wherein said first, second, third and fourth electrodes comprise a carbon-based electrode paste provided in a perforated isolating frame. ### Claim 13 (depends on 8) An electrochemical energy storage device as in claim 8, wherein said electrodes are respectively characterized by a thickness of between about 30 and 300 microns. ### Claim 14 An electrochemical energy storage device, comprising: a stacked assembly comprising respective first and second portions provided on top and bottom surfaces of a terminal current collector, each said first and second portion respectively comprising a first electrode, a first membrane, a second electrode, a bi-polar current collector, a third electrode, a second membrane, and a fourth electrode, said first electrodes of said first and second portions forming respective top and bottom surfaces of said stacked assembly, and said terminal current collector extending laterally from said stacked assembly and providing a first external electrical contact for said energy storage device; a potting material coating selected portions of said stacked assembly; and a pre-formed metal sheet outer casing surrounding and electrically connected to the top and bottom surfaces of said stacked assembly and serving as a second external electrical contact for said energy storage device. ### Claim 15 (depends on 14) An electrochemical energy storage device as in claim 14, wherein said terminal current collector comprises a carbon/plastic composite film coated on one or more selected sides thereof with a metallic film. ### Claim 16 (depends on 14) An electrochemical energy storage device as in claim 14, wherein each said bi-polar current collector comprises a conductive polymer layer. ### Claim 17 (depends on 14) An electrochemical energy storage device as in claim 14, wherein said outer casing is partially bowed to impart a spring loading thereto. ### Claim 18 (depends on 14) An electrochemical energy storage device as in claim 14, wherein each of said first, second, third and fourth electrodes comprise a carbon-based electrode paste provided in a perforated isolating frame. ### Claim 19 (depends on 14) An electrochemical energy storage device as in claim 14, wherein said electrodes are respectively characterized by a thickness of between about 30 and 300 microns. ### Claim 20 An electrochemical energy storage device, comprising: a plurality of cells in series, said plurality of cells being electrically connected via a plurality of bi-polar current collectors and wherein said plurality of cells, said plurality of bi-polar current collectors and at least one terminal current collector are stacked to form a stacked assembly, said at least one terminal current collector extending laterally from said stacked assembly and providing a first external electrical contact; and a pre-formed metal sheet outer casing surrounding and electrically connected to said stacked assembly and serving as a second external electrical contact; wherein said pre-formed metal sheet outer casing comprises stainless steel; and wherein said outer casing is coated with at least one conductive metal selected from the group consisting of gold, nickel, platinum, silver, lead, tin and brass. ### Claim 21 (depends on 20) An electrochemical energy storage device as in claim 20, wherein said plurality of cells comprise at least one of a double-layer capacitor, a pseudo-capacitor, a battery or a combination thereof. ### Claim 22 (depends on 20) An electrochemical energy storage device as in claim 20, wherein said terminal current collector comprises a carbon/plastic composite film coated on one or more selected sides thereof with a metallic film. ### Claim 23 (depends on 20) An electrochemical energy storage device as in claim 20, wherein said outer casing is partially bowed to impart a spring loading thereto. ### Claim 24 An electrochemical energy storage device, comprising: a plurality of cells in series, said plurality of cells being electrically connected via a plurality of bi-polar current collectors and wherein said plurality of cells, said plurality of bi-polar current collectors and at least one terminal current collector are stacked to form a stacked assembly, said at least one terminal current collector extending laterally from said stacked assembly and providing a first external electrical contact; and a pre-formed metal sheet outer casing surrounding and electrically connected to said stacked assembly and serving as a second external electrical contact; and wherein said bi-polar current collector comprises a conductive polymer layer.