# US 12,113,248 B2 · Connector of large cylindrical battery, battery module and battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,248 B2 - Document ID: US12113248B2 - Status: Granted - Kind: B2 - Application number: 18/091,416 - Filed: 2022-12-30 - Published: 2023-07-27 - Granted: 2024-10-08 - Earliest claimed: 2022-01-25 - Assignees: Eve Power Co., Ltd. - Applicants: Eve Power Co., Ltd. - Inventors: Guojiang Zhang - Web page: https://patentgrep.com/patent/US12113248B2 ## CPC - H01M 50/581: in response to temperature - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - 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 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/503: characterised by the shape of the interconnectors - H01M 50/512: Connection only in parallel - H01M 50/516: by welding, soldering or brazing - H01M 50/522: Inorganic material - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 50/548: on opposite sides of the cell - H01M 50/559: Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells (H01M50/553 takes precedence) - H01M 50/583: in response to current, e.g. fuses - H01M 2200/103: Fuse - Y02E 60/10: Energy storage using batteries - 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 ## Abstract The present application relates to the technical field of batteries and discloses a connector for a large cylindrical battery, a battery module, and a battery pack. The connector for the large cylindrical battery is configured for a large cylindrical battery having a positive electrode and a negative electrode on a same side, and includes a plurality of conductive units. Each conductive unit includes a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region provided between the positive-electrode connecting region and the negative-electrode connecting region. Adjacent conductive units are electrically connected to each other via a connection member. ## Claims ### Claim 1 A connector of a large cylindrical battery, configured for a large cylindrical battery having a positive electrode and a negative electrode on a same side, and the connector comprising a plurality of conductive units; wherein each of the plurality of conductive units comprises a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region arranged between the positive-electrode connecting region and the negative-electrode connecting region; when a temperature of a circuit reaches a melting point of the first current-limiting region, the first current-limiting region is fused; and every two adjacent conductive units of the plurality of conductive units are electrically connected to each other by a connecting member; wherein the connecting member is connected between the positive-electrode connecting region of one of the two adjacent conductive units and the positive-electrode connecting region of the other one of the two adjacent conductive units; a second current-limiting region is arranged on the connecting member; when the temperature of the circuit reaches a melting point of the second current-limiting region, the second current-limiting region is fused; and each of the first current-limiting region and the second connecting member defines at least one through hole. ### Claim 2 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein the at least one through hole comprises one or more first through holes defined in the first current-limiting region and a second through hole defined in the second current-limiting region. ### Claim 3 (depends on 2) The connector of a large cylindrical battery according to claim 2, wherein the number of the one or more first through holes is more than one; the more than one first through holes are arranged along a width direction of each of the plurality of conductive units and are spaced apart from each other. ### Claim 4 (depends on 2) The connector of a large cylindrical battery according to claim 2, wherein a metal having a low melting point is arranged on at least one of the first current-limiting region and the second current-limiting region. ### Claim 5 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein the connector is configured to meet at least one of the following: for each of the plurality of conductive units, a thickness of the first current-limiting region is less than a thickness of the rest portion of the conductive unit; and a thickness of the second current-limiting region is less than a thickness of the rest portion of the connecting member. ### Claim 6 (depends on 5) The connector of a large cylindrical battery according to claim 5, wherein the thickness of the first current-limiting region is 0.8 mm to 1.6 mm. ### Claim 7 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein each of the plurality of conductive units is configured as a protruded structure, and a protruded portion of the protruded structure serves as the first current-limiting region. ### Claim 8 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein each of the plurality of conductive units is configured as a Z-shaped structure, and an inclined part of the Z-shaped structure serves as the first current-limiting region. ### Claim 9 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein each of the plurality of conductive units is arranged with a wavy structure, and the first current-limiting region is arranged on the wavy structure. ### Claim 10 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein the negative-electrode connecting region comprises an arc-shaped notch that matches a positive electrode post of the large cylindrical battery. ### Claim 11 (depends on 1) The connector of a large cylindrical battery according to claim 1, wherein the positive-electrode connecting region comprises an arc-shaped section, and a shape of an outer edge of the arc-shaped section matches and fits with a shape of an outer edge of the positive electrode post. ### Claim 12 A battery module, comprising a plurality of large cylindrical batteries and a connector of a large cylindrical battery, wherein a positive electrode and a negative electrode of each of the plurality of large cylindrical batteries are located on a same side; and the connector comprises a plurality of conductive units; wherein each of the plurality of conductive units comprises a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region arranged between the positive-electrode connecting region and the negative-electrode connecting region; when a temperature of a circuit reaches a melting point of the first current-limiting region, the first current-limiting region is fused; and every two adjacent conductive units of the plurality of conductive units are electrically connected to each other by a connecting member; wherein the connecting member is connected between the positive-electrode connecting region of one of the two adjacent conductive units and the positive-electrode connecting region of the other one of the two adjacent conductive units; a second current-limiting region is arranged on the connecting member; when the temperature of the circuit reaches a melting point of the second current-limiting region, the second current-limiting region is fused; and each of the first current-limiting region and the second connecting member defines at least one through hole. ### Claim 13 (depends on 12) The battery module according to claim 12, wherein the plurality of large cylindrical batteries are arranged into a plurality of sets, large cylindrical batteries of adjacent sets of the plurality of sets are misaligned with each other, and adjacent conductive units of the plurality of conductive units are misaligned with each other. ### Claim 14 A battery pack, comprising a battery module, wherein the battery module comprises a plurality of large cylindrical batteries and a connector of a large cylindrical battery, a positive electrode and a negative electrode of each of the plurality of large cylindrical batteries are located on a same side; and the connector comprises a plurality of conductive units; wherein each of the plurality of conductive units comprises a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region arranged between the positive-electrode connecting region and the negative-electrode connecting region; when a temperature of a circuit reaches a melting point of the first current-limiting region, the first current-limiting region is fused; and every two adjacent conductive units of the plurality of conductive units are electrically connected to each other by a connecting member; wherein the connecting member is connected between the positive-electrode connecting region of one of the two adjacent conductive units and the positive-electrode connecting region of the other one of the two adjacent conductive units; a second current-limiting region is arranged on the connecting member; when the temperature of the circuit reaches a melting point of the second current-limiting region, the second current-limiting region is fused; and each of the first current-limiting region and the second connecting member defines at least one through hole.