# US 10,770,708 B2 · Busbar and battery module having such a busbar > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,708 B2 - Document ID: US10770708B2 - Status: Granted - Kind: B2 - Application number: 15/779,014 - Filed: 2016-08-31 - Published: 2018-12-06 - Granted: 2020-09-08 - Earliest claimed: 2015-11-24 - Assignees: VOLTLABOR GmbH - Applicants: Nordfels GmbH - Inventors: Martin Reingruber; Edmund Jenner-Braunschmied - Web page: https://patentgrep.com/patent/US10770708B2 ## CPC - H01R 13/68: with built-in fuse - H01H 85/00: Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive (switches actuated by melting of fusible material H01H37/76; disposition or arrangement of fuses on boards H02B1/18) - H01M 50/503: characterised by the shape of the interconnectors - H01M 50/512: Connection only in parallel - H01M 50/522: Inorganic material - H01M 50/581: in response to temperature - H01M 50/583: in response to current, e.g. fuses - H01R 13/2421: {using coil springs} - H01R 31/08: Short-circuiting members for bridging contacts in a counterpart - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - H01H 2085/025: {Structural association with a binding post of a storage battery} - H01M 2200/103: Fuse - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery, a battery pack for the battery, and a busbar for connecting battery cells, the busbar having an electrically conductive metal sheet and having at least one sheet metal connector piece, which is incorporated into the metal sheet with the aid of a cutting method and which protrudes from the metal sheet; the sheet metal connector piece has a contacting part for electrically connecting to a pole of the battery cell and a safety part embodied in the form of a fuse. In order to create a busbar that is durable and simply designed and nevertheless has a high degree of fire safety, it is proposed that the safety part be embodied in the form of a coiled helical spring. ## Claims ### Claim 1 A busbar for connecting battery cells, the busbar comprising: an electrically conductive metal sheet; at least one sheet metal connector piece, which is incorporated into the metal sheet with the aid of a cutting method and which protrudes from the metal sheet; wherein the sheet metal connector piece has a contacting part for electrically connecting to a pole of a battery cell and a safety part which is a coiled helical spring embodied in the form of a fuse. ### Claim 2 (depends on 1) The busbar according to claim 1, wherein the safety part is coiled in a square or spiral shape. ### Claim 3 (depends on 1) The busbar according to claim 1, wherein the safety part is coiled around the contacting part. ### Claim 4 (depends on 1) The busbar according to claim 1, wherein a coil diameter of the safety part decreases in a direction of the contacting part starting from the metal sheet. ### Claim 5 (depends on 1) The busbar according to claim 1, wherein the safety part is a helical tension/compression spring. ### Claim 6 (depends on 1) The busbar according to claim 1, wherein the safety part is a sheet metal strip. ### Claim 7 (depends on 1) The busbar according to claim 1, wherein at one of its ends, the safety part adjoins the metal sheet and at its other end, the safety part adjoins the contacting part. ### Claim 8 (depends on 1) The busbar according to claim 1, wherein the metal sheet contains a nickel material. ### Claim 9 (depends on 1) The busbar according to claim 1, wherein all of the sheet metal connector pieces of the metal sheet are uniformly embodied for connection to a respective battery cell. ### Claim 10 (depends on 1) The busbar according to claim 1, wherein the safety part is a short-circuit fuse. ### Claim 11 (depends on 1) A battery module having a plurality of battery cells and having a busbar according to claim 1, wherein the busbar is connected with each of its sheet metal connector pieces to a respective pole of a battery cell. ### Claim 12 (depends on 11) The battery module according to claim 11, wherein the battery cells positioned next to one another are electrically connected in parallel fashion via the busbar. ### Claim 13 (depends on 11) A battery having several battery modules according to claim 11, which are electrically connected to one another.