# US 2021/0175643 A1 · Conductive cell frame > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0175643 A1 - Document ID: US20210175643A1 - Status: Published application - Kind: A1 - Application number: 16/874,563 - Filed: 2020-05-14 - Published: 2021-06-10 - Earliest claimed: 2019-12-04 - Assignees: Stl Technology Co., Ltd. - Applicants: STL Technology Co., Ltd. - Inventors: Cooper Chang - Web page: https://patentgrep.com/patent/US20210175643A1 ## CPC - H01M 50/503: characterised by the shape of the interconnectors - H01R 4/625: {Soldered or welded connections} - B23K 11/14: Projection welding - B23K 11/20: of different metals - H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/516: by welding, soldering or brazing - H01M 50/522: Inorganic material - H01M 50/526: having a layered structure - H01R 11/09: the connecting locations being identical - H01R 43/0214: {Resistance welding (H01R43/0228 takes precedence)} - 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 - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A conductive cell frame for connecting a plurality of battery cells is disclosed. The conductive cell frame includes a first conductive portion and a plurality of second conductive portions, and the upper surface of each second conductive portion is connected to the first conductive portion through a eutectic portion. The lower surface of each second conductive portion is provided with at least one protruding welding portion, wherein the second conductive portion is connected to the housing of the battery cell through the protruding welding portion. The first conductive portion and the second conductive portion are made of different materials, wherein the resistance of the second conductive portion is greater than the resistance of the first conductive portion. Thus, a small current can be used to connect to the conductive cell frame and the battery cell, which not only reduces the consumption of energy, but also avoids damage of the battery cell during the electric welding process ## Claims ### Claim 1 A conductive cell frame comprising: a first conductive portion; a plurality of eutectic portions; a plurality of second conductive portions, each the second conductive portion comprising a first surface and a second surface, wherein the first surface of the second conductive portion is connected to the first conductive portion through the eutectic portion; and at least one protruding welding portion disposed on the second surface of the second conductive portion for connecting to a battery cell; wherein the first conductive portion and the second conductive portion are of different materials and a resistance of the second conductive portion is greater than a resistance of the first conductive portion. ### Claim 2 (depends on 1) The conductive cell frame of claim 1, wherein the second conductive portion comprises at least one recess portion disposed on the first surface of the second conductive portion and a location of the recess portion corresponds to a location of the protruding welding portion. ### Claim 3 (depends on 1) The conductive cell frame of claim 1, wherein the second conductive portion and the first conductive portion are partially overlapped. ### Claim 4 (depends on 3) The conductive cell frame of claim 3, wherein the first conductive portion and the protruding welding portion on the second conductive portion are not overlapped. ### Claim 5 (depends on 1) The conductive cell frame of claim 1, wherein the second conductive portion is completely overlapped by the first conductive portion to form a bulge on a surface of the first conductive portion to create a gap between the first conductive portion and the battery cell connected to the protruding welding portion. ### Claim 6 (depends on 5) The conductive cell frame of claim 5, wherein the battery cell comprises an insulation ring to isolate an anode and a cathode of the battery cell, the insulation ring comprises an encircled region, the anode of the battery cell is located in the encircled region, and a cross-sectional area of the second conductive portion is smaller than or equal to a cross-sectional area of the encircled region of the insulation ring or a cross-sectional area of the anode. ### Claim 7 (depends on 5) The conductive cell frame of claim 5, wherein the second conductive portion comprises at least one recess portion disposed on the first surface of the second conductive portion, a location of the recess portion corresponds to a location of the protruding welding portion, and the eutectic portion is connected to the first surface and the recess portion of the second conductive portion. ### Claim 8 (depends on 1) The conductive cell frame of claim 1, wherein the first conductive portion comprises a plurality of braches respectively connected to the plurality of second conductive portions. ### Claim 9 (depends on 1) The conductive cell frame of claim 1, wherein the first conductive portion comprises a plurality of branches, and each branch comprises a plurality of sub-branches and is connected to one of the second conductive portions through the plurality of sub-branches. ### Claim 10 (depends on 1) The conductive cell frame of claim 1, wherein a thickness or a cross-sectional area of the second conductive portion is smaller than a thickness or a cross-sectional area of the first conductive portion.