# US 2013/0157113 A1 · Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157113 A1 - Document ID: US20130157113A1 - Status: Published application - Kind: A1 - Application number: 13/714,306 - Filed: 2012-12-13 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Lithium Energy Japan - Inventors: Toshiki Yoshioka; Toshiki KUSUNOKI - Web page: https://patentgrep.com/patent/US20130157113A1 ## CPC - H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes} - B23K 26/22: Spot welding - H01G 11/10: Multiple hybrid or EDL capacitors, e.g. arrays or modules (housings, cases, encapsulations or mountings thereof H01G11/78) - H01G 11/74: Terminals, e.g. extensions of current collectors - 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 10/0436: {Small-sized flat cells or batteries for portable equipment} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/345: {Gastight metal hydride accumulators} - H01M 50/516: by welding, soldering or brazing - H01M 50/566: by welding, soldering or brazing - H02G 5/00: Installations of bus-bars - H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules - H01M 50/522: Inorganic material - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 50/562: characterised by the material - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - Y02E 60/13: Energy storage using capacitors - 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 - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - 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) - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES - 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 electric storage device includes: electric storage elements including external terminals; and bus bars connected to the external terminals, wherein the bus bars include thin-walled portions, and the thin-walled portions and the external terminals are welded together. ## Claims ### Claim 1 An electric storage device comprising: an electric storage element including an external terminal; and a bus bar connected to the external terminal, wherein the bus bar includes a thin-walled portion, and the thin-walled portion and the external terminal are welded together. ### Claim 2 (depends on 1) The electric storage device according to claim 1, wherein the electric storage device comprises at least the two electric storage elements, and the thin-walled portions are provided to at least two portions and welded to the external terminals of the two electric storage elements. ### Claim 3 (depends on 1) The electric storage device according to claim 1, wherein the thin-walled portion is formed at least at a portion of the bus bar in contact with the external terminal. ### Claim 4 (depends on 1) The electric storage device according to claim 1, wherein the thin-walled portion is formed along an outer edge of the bus bar. ### Claim 5 (depends on 4) The electric storage device according to claim 4, wherein the outer edge of the bus bar is in a shape without discrete portions. ### Claim 6 (depends on 1) The electric storage device according to claim 1, wherein the thin-walled portion is formed at a central portion of the bus bar. ### Claim 7 (depends on 6) The electric storage device according to claim 6, wherein an outer edge of the thin-walled portion is in a closed shape without discrete portions. ### Claim 8 (depends on 1) The electric storage device according to claim 1, wherein the bus bar includes a main body portion and a connection portion continuous with the main body portion and to be connected to the external terminal, and the thin-walled portion is formed at the connection portion. ### Claim 9 (depends on 8) The electric storage device according to claim 8, wherein the connection portion has a smaller width than the main body portion. ### Claim 10 (depends on 8) The electric storage device according to claim 8, wherein the electric storage device comprises at least the two electric storage elements, and a pair of the connection portions are provided to both ends of the main body portion to connect the external terminals of the two electric storage elements. ### Claim 11 (depends on 10) The electric storage device according to claim 10, wherein each of the electric storage elements includes a case and is in a shape of a flat prism, one face of the case on which the external terminal is disposed is in a rectangular shape, at least the two electric storage elements are disposed so that the one faces are arranged in a longitudinal direction, the main body portion is formed to correspond to a width of the one face, and the connection portions are formed to correspond to a width of the external terminal which is smaller than the width of the one face. ### Claim 12 (depends on 10) The electric storage device according to claim 10, wherein each of the electric storage elements includes a case and is in a shape of a flat prism, one face of the case on which the external terminal is disposed is in a rectangular shape, the plurality of electric storage elements are disposed in lines and rows so that the one faces are arranged in a longitudinal direction and a short-side direction, the main body portion of the bus bar for connecting the external terminals of the two electric storage elements arranged in the longitudinal direction out of the bus bars is formed to correspond to a width of the one face, and the connection portions of the bus bar are formed to correspond to a width of the external terminal which is smaller than the width of the one face. ### Claim 13 (depends on 1) The electric storage device according to claim 1, wherein the thin-walled portion is formed in a stepped shape. ### Claim 14 (depends on 1) The electric storage device according to claim 1, wherein the thin-walled portion is formed in a shape having a thickness decreasing toward an outer edge. ### Claim 15 A manufacturing method of an electric storage device, which includes an electric storage element having an external terminal and a bus bar connected to the external terminal, the method comprising the step of welding a thin-walled portion, which is formed at the bus bar, and the external terminal. ### Claim 16 (depends on 15) The manufacturing method of the electric storage device according to claim 15, wherein the welding is laser welding. ### Claim 17 (depends on 16) The manufacturing method of the electric storage device according to claim 16, wherein the laser welding is perpendicular application of a laser beam to the bus bar. ### Claim 18 A bus bar to be connected to an external terminal of an electric storage element having the external terminal, the bus bar comprising a thin-walled portion to be welded to the external terminal. ### Claim 19 A bus bar for connecting external terminals of two electric storage elements respectively having the external terminals, the bus bar comprising thin-walled portions, to be welded to the external terminals of the two electric storage elements, at least at two portions.