US 12,218,373 B2
Battery module and battery module manufacturing method
Nobuyuki Yamazaki, Okazaki (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Jan. 19, 2021, as Appl. No. 17/151,717.
Claims priority of application No. 2020-035122 (JP), filed on Mar. 2, 2020.
Prior Publication US 2021/0273286 A1, Sep. 2, 2021
Int. Cl. H01M 50/289 (2021.01); H01M 10/04 (2006.01); H01M 50/209 (2021.01); H01M 50/244 (2021.01); H01M 50/293 (2021.01)
CPC H01M 50/289 (2021.01) [H01M 10/0481 (2013.01); H01M 50/209 (2021.01); H01M 50/244 (2021.01); H01M 50/293 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A battery module manufacturing method to manufacture a battery module comprising a box-shaped housing case that is open at an upper side; a battery stack in which a plurality of battery cells are stacked along a horizontal direction, and that is housed inside the housing case, the battery stack including resin frames between each adjacent pair of the battery cells and resin end plates at respective ends of the battery stack; and a plurality of types of shim that are plate shaped, made of different materials from each other, and stacked in a stacking direction of the battery cells between at least one of the resin end plates and the housing case in a state in which the battery stack is pressed along the stacking direction, at least one of the plurality of types of shim contacting the at least one of the resin end plates, the battery module manufacturing method comprising
a first pressing process of pressing the battery stack along the stacking direction of the battery cells;
a length measuring process of measuring a dimension in the stacking direction of the battery cells that has been pressed during the first pressing process;
an insertion gap derivation process of deriving an insertion gap when the battery stack is inserted into the housing case based on a result of the dimension of the length measuring process;
a selection process of selecting a plurality of types of shim made of different materials only in a case in which the insertion gap derived during the insertion gap derivation process is a threshold value or less;
a second pressing process of pressing the battery stack and the plurality of types of shim selected during the selection process in a state in which a variable is controlled such that, from among the plurality of types of shim, a shim having a relatively higher variable dependency for elastic modulus changes in thickness among the plurality of types of shim; and
an insertion process of inserting the plurality of types of shim and the battery stack that have been pressed during the second pressing process into the housing.