# US 2026/0066478 A1 · Battery module, vehicle, and bus bar > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0066478 A1 - Document ID: US20260066478A1 - Status: Published application - Kind: A1 - Application number: 19/304,998 - Filed: 2025-08-20 - Published: 2026-03-05 - Earliest claimed: 2024-08-29 - Assignees: Kabushiki Kaisha Toshiba - Applicants: Kabushiki Kaisha Toshiba - Inventors: Yohei UEMURA; Sayaka MORIMOTO; Ryosuke YAGI; Kouki SAKAKIBARA - Web page: https://patentgrep.com/patent/US20260066478A1 ## CPC - H01M 50/503: characterised by the shape of the interconnectors - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/505: comprising a single busbar - H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules - H01M 50/509: characterised by the type of connection, e.g. mixed connections - B60K 1/04: of the electric storage means for propulsion - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - 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 ## Abstract A battery module in embodiment includes two cell blocks electrically connected in series and a bus bar, and each of the cell blocks includes a plurality of battery cells electrically connected in parallel. The bus bar forms one or more intra-block connection portions each of which connects two corresponding battery cells belonging to a same cell block to each other for each of the cell blocks, and forms a plurality of inter-block connection portions each of which connects two corresponding battery cells belonging to different cell blocks to each other. In the bus bar, the resistance of each of the intra-block connection portions is higher than the resistance of any of the inter-block connection portions. ## Claims ### Claim 1 A battery module comprising: two cell blocks each of which includes a plurality of battery cells electrically connected in parallel to each other, the two cell blocks being electrically connected in series to each other; and a bus bar integrally formed of a conductive material and connecting the battery cells of the two cell blocks to each other, the bus bar forming one or more intra-block connection portions each of which connects two corresponding battery cells belonging to a same cell block for each of the two cell blocks, and forming a plurality of inter-block connection portions each of which connects two corresponding battery cells belonging to different cell blocks, resistance of each of the intra-block connection portions being higher than resistance of any of the inter-block connection portions. ### Claim 2 (depends on 1) The battery module according to claim 1, wherein the battery module includes, as the two cell blocks, a first cell block including a first battery cell and a second battery cell as the battery cells, and a second cell block including a third battery cell and a fourth battery cell as the battery cells, wherein the bus bar forms, as the intra-block connection portions, a first intra-block connection portion that connects the first battery cell and the second battery cell, and a second intra-block connection portion that connects the third battery cell and the fourth battery cell, and as the inter-block connection portions, a first inter-block connection portion that connects the first battery cell and the third battery cell, and a second inter-block connection portion that connects the second battery cell and the fourth battery cell, resistance of each of the first intra-block connection portion and the second intra-block connection portion is 1.2 times or more and 4.2 times or less of resistance of each of the first inter-block connection portion and the second inter-block connection portion. ### Claim 3 (depends on 1) The battery module according to claim 1, wherein the bus bar includes: a plurality of extending plate parts each of which connects corresponding two battery cells belonging to different cell blocks and constitutes a corresponding one of the inter-block connection portions; and one or more bridge plate parts each of which is bridged between corresponding two of the extending plate parts and has a plate width smaller than a plate width of any of the extending plate parts. ### Claim 4 (depends on 1) The battery module according to claim 1, wherein the bus bar includes: a plurality of extending plate parts each of which connects corresponding two battery cells belonging to different cell blocks and constitutes a corresponding one of the inter-block connection portions; and one or more bridge plate portions each of which is bridged between corresponding two of the extending plate parts and has a plate thickness smaller than a plate thickness of any of the extending plate parts. ### Claim 5 (depends on 1) A vehicle comprising: the battery module according to claim 1; and a vehicle body on which the battery module is mounted. ### Claim 6 A bus bar that connects a plurality of batteries of two cell blocks to each other in a battery module, the battery module including the two cell blocks each of which includes the batteries electrically connected in parallel to each other, the two cell blocks being electrically connected in series to each other, wherein the bus bar is integrally formed of a conductive material, the bus bar forms one or more intra-block connection portions each of which connects two corresponding battery cells belonging to a same cell block for each of the two cell blocks, the bus bar forms a plurality of inter-block connection portions each of which connects two corresponding battery cells belonging to different cell blocks, and resistance of each of the intra-block connection portions is higher than resistance of any of the inter-block connection portions.