US 12,148,936 B2
Method for manufacturing angular battery, and angular battery
Yosuke Shimura, Nagoya (JP); Hideki Asadachi, Toyota (JP); and Minehiro Funato, Toyota (JP)
Assigned to PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed by PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed on Jul. 28, 2021, as Appl. No. 17/386,991.
Claims priority of application No. 2020-136274 (JP), filed on Aug. 12, 2020.
Prior Publication US 2022/0052401 A1, Feb. 17, 2022
Int. Cl. H01M 50/103 (2021.01); H01M 50/102 (2021.01)
CPC H01M 50/103 (2021.01) [H01M 50/102 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A method for manufacturing an angular battery including a battery case that has a rectangular bottom surface, a pair of rectangular long side surfaces having, as one side thereof, a long side of the rectangular bottom surface and facing each other, and a pair of short side surfaces having, as one side thereof, a short side of the rectangular bottom surface and facing each other; and an electrode body that is accommodated inside the battery case and has a pair of wide surfaces facing the rectangular long side surfaces, the manufacturing method including:
a preparation step of preparing a first member having substantially U-shaped end faces including the bottom surface and the pair of rectangular long side surfaces extending from the bottom surface, and a second member and a third member that are to be joined to respective end faces of the first member and constitute the short side surfaces, the members constituting the battery case;
a sandwiching step of sandwiching the wide surfaces of the electrode body between the pair of rectangular long side surfaces of the first member; and
a joining step of joining the second and third members to the respective end faces of the first member in a state in which the electrode body is sandwiched by the pair of rectangular long side surfaces, wherein
in the preparation step, the first member is prepared with the pair of rectangular long side surfaces inclined relative to each other along their entire respective lengths so that a distance between the rectangular long side surfaces becomes smaller as a distance from the bottom surface of the first member increases, and the second and third members constituting the short side surfaces are each prepared such that an entirety of each of the short side surfaces is shaped as a trapezoid, and
the joining step results in the battery case for the angular battery having a finished, trapezoidal outer shape with the trapezoid-shaped short side surfaces fixing the pair of rectangular long side surfaces at an inclined angle relative to each other with a greater distance between the rectangular long side surfaces at the bottom surface of the first member than a distance between the rectangular long side surfaces at an opposite top side of the first member.