# US 2019/0173062 A1 · Prismatic secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173062 A1 - Document ID: US20190173062A1 - Status: Published application - Kind: A1 - Application number: 16/324,329 - Filed: 2017-07-20 - Published: 2019-06-06 - Earliest claimed: 2016-09-05 - Assignees: Hitachi Automotive Systems, Ltd. - Applicants: Hitachi Automotive Systems, Ltd. - Inventors: Hiroaki EGAWA; Yutaka SATOU - Web page: https://patentgrep.com/patent/US20190173062A1 ## CPC - H01M 50/147: Lids or covers - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/188: the sealing members being arranged between the lid and terminal - H01M 50/193: Organic material - H01M 50/534: characterised by the material of the leads or tabs - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/627: Filling ports - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Provided is a prismatic secondary battery with improved productivity and mounting density. A prismatic secondary battery 100 of the present invention includes a battery can 1 that contains an electric storage element 3 and has a pair of wide surfaces 1b, a pair of narrow surfaces 1c, a bottom surface 1d, and an opening 1a, a lid 6 having a positive electrode-side through hole 46 and a negative electrode-side through hole 26 and closing the opening portion 1a of the battery can 1, and flat plate-like positive electrode current collector plate 44 and negative electrode current collector plate 24 inserted in the positive electrode-side through hole 46 and the negative electrode-side through hole 26 and extending in a straight line toward the bottom surface 1d. Then, the positive electrode current collector plate 44 and the negative electrode current collector plate 24 are made of different metal materials from each other as main materials, and an insertion position of the positive electrode current collector plate 44 deviates on a side of one of the wide surfaces 1b with respect to an insertion position of the negative electrode current collector plate 24. ## Claims ### Claim 1 A prismatic secondary battery comprising: a battery container containing an electric storage element and having a pair of wide surfaces, a pair of narrow surfaces, a bottom surface, and an opening; a lid having a first through hole and a second through hole and closing the opening of the battery container; a flat plate-like first current collector plate inserted into the first through hole and extending in a straight line toward the bottom surface; and a flat plate-like second current collector plate inserted into the second through hole and extending in a straight line toward the bottom surface, wherein the first current collector plate and the second current collector plate are made of metal materials different from each other as main materials, and an insertion position of the first current collector plate deviates on a side of one of the wide surfaces with respect to an insertion position of the second current collector plate. ### Claim 2 (depends on 1) The prismatic secondary battery according to claim 1, wherein the first through hole and the second through hole deviate on the side of one of the wide surfaces with respect to a center of the lid. ### Claim 3 (depends on 1) The prismatic secondary battery according to claim 1, wherein the first through hole deviates on the side of one of the wide surfaces on the basis of a center of the lid, and the second through hole deviates on a side of the other of the wide surfaces on the basis of the center of the lid. ### Claim 4 (depends on 1) The prismatic secondary battery according to claim 1, wherein the first current collector plate is a positive electrode current collector plate containing aluminum as the main material, and the second current collector plate is a negative electrode current collector plate containing copper as the main material. ### Claim 5 (depends on 1) The prismatic secondary battery according to claim 1, wherein a resin member is arranged and sealed between the first current collector plate and the first through hole, and a resin member is arranged and sealed between the second current collector plate and the second through hole. ### Claim 6 (depends on 5) The prismatic secondary battery according to claim 5, wherein a gap of 0.3 mm or more is provided between the first current collector plate and the first through hole, and a gap of 0.3 mm or more is provided between the second current collector plate and the second through hole. ### Claim 7 (depends on 5) The prismatic secondary battery according to claim 5, wherein roughening treatment is applied to at least adhesion portions with the resin members, of the first current collector plate and the second current collector plate, in the first current collector plate and the second current collector plate. ### Claim 8 (depends on 5) The prismatic secondary battery according to claim 5, wherein the first current collector plate and the second current collector plate are fixed to the lid with the respective resin members. ### Claim 9 (depends on 5) The prismatic secondary battery according to claim 5, wherein either one of the first current collector plate and the second current collector plate has a cladding conversion portion with a dissimilar metal, and the cladding conversion portion is arranged in the resin member.