# US 9,040,183 B2 · Connecting structure for secondary battery and battery pack including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,040,183 B2 - Document ID: US9040183B2 - Status: Granted - Kind: B2 - Application number: 14/017,922 - Filed: 2013-09-04 - Published: 2014-01-02 - Granted: 2015-05-26 - Earliest claimed: 2011-06-10 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Jong-Gyu Sung; Jae-Chan Lee - Web page: https://patentgrep.com/patent/US9040183B2 ## CPC - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) - H01M 50/50: Current conducting connections for cells or batteries - H01M 50/503: characterised by the shape of the interconnectors - H01M 50/517: by fixing means, e.g. screws, rivets or bolts - H01M 50/519: comprising printed circuit boards [PCB] - H01M 50/522: Inorganic material - H01M 50/574: Devices or arrangements for the interruption of current - H01R 11/288: {Interconnections between batteries} - H01M 6/44: of tubular or cup-shaped cells - H01M 50/548: on opposite sides of the cell - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A connecting structure for a secondary battery for electrically connecting a core pack where two or more unit cells are electrically connected and a protection circuit module made of the unit cells of the core pack and a PCB substrate. The connecting structure includes a metal plate having an electrode connecting unit connected to an electrode of each unit cell of the core pack and a circuit connecting unit connected to the protection circuit module; and a circuit terminal unit electrically connected to the circuit connecting unit by being located in a connection hole formed in the PCB substrate of the protection circuit module so that the upper and lower portions of the PCB substrate communicate with each other. The circuit connecting unit is coupled and electrically connected to the circuit terminal unit by means of a connection method which allows selective connection and separation. ## Claims ### Claim 1 A connecting structure for a secondary battery for electrically connecting between a core pack where two or more unit cells are electrically connected and a protection circuit module made of a PCB substrate having a connection hole therethrough, the connecting structure comprising: a metal plate having an electrode connecting unit connected to an electrode of each unit cell of the core pack and a circuit connecting unit having a plate shape so as to be connected to the protection circuit module; and a circuit terminal unit having an insert groove into which the plate shape of the circuit connection unit is inserted, and surface-mounted on an upper surface of the PCB substrate to cover the connection hole such that an open portion of the insert groove communicates with the connection hole, wherein the plate shape of the circuit connecting unit is plugged into the insert groove or plugged out from the insert groove, through the connection hole. ### Claim 2 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the circuit terminal unit is electrically connected to the protection circuit module. ### Claim 3 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the circuit terminal unit further includes an elastic surface surface-contacting with the circuit connecting unit in the insert groove to fix the circuit connecting unit. ### Claim 4 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the circuit connecting unit further has coupling grooves formed at both edges thereof in the width direction. ### Claim 5 (depends on 4) The connecting structure for a secondary battery according to claim 4, wherein the circuit terminal unit includes an elastic piece inserted into the coupling groove of the circuit connecting unit in the insert groove to fix the circuit connecting unit. ### Claim 6 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the metal plate is made of nickel. ### Claim 7 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the unit cell is a cylindrical battery. ### Claim 8 (depends on 1) A battery pack including the connecting structure for a secondary battery defined in claim 1. ### Claim 9 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the circuit terminal unit surface-mounted on the upper surface of the PCB substrate is directly connected to the upper surface of the PCB substrate, and protrudes from the upper surface of the PCB substrate. ### Claim 10 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the upper surface of the PCB substrate on which the circuit terminal unit is surface-mounted is a far side surface of the PCB substrate with respect to the circuit connecting unit, not a connecting surface of the PCB substrate to which the circuit connecting unit is connected. ### Claim 11 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein an interior of the protruding circuit terminal unit surface-mounted on the upper surface of the PCB substrate forms the insert groove into which the plate shape of the circuit connection unit is inserted. ### Claim 12 (depends on 1) The connecting structure for a secondary battery according to claim 1, wherein the circuit terminal unit surface-mounted on the upper surface of the PCB substrate is directly connected to the upper surface of the PCB substrate, and protrudes from the upper surface of the PCB substrate, wherein the upper surface of the PCB substrate on which the circuit terminal unit is surface-mounted is a far side surface of the PCB substrate with respect to the circuit connecting unit, and not a connecting surface of the PCB substrate to which the circuit connecting unit is connected, and wherein an interior of the protruding circuit terminal unit surface-mounted on the upper surface of the PCB substrate forms the insert groove into which the plate shape of the circuit connection unit is inserted.