| CPC H01M 50/244 (2021.01) [B60K 1/04 (2013.01); B60L 50/64 (2019.02); H01M 50/209 (2021.01); H01M 50/224 (2021.01); H01M 50/231 (2021.01); H01M 50/249 (2021.01); H01M 50/262 (2021.01); H01M 50/276 (2021.01); H01M 50/284 (2021.01); H01M 50/291 (2021.01); H01M 2220/20 (2013.01)] | 15 Claims |
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1. A vehicle battery system comprising:
a plurality of battery blocks each including one or more battery cells; and
an exterior case that stores the plurality of battery blocks,
wherein
the exterior case includes:
a tubular case including an upper case and a lower case which are fixed to each other to have a tubular shape,
a pair of end face plates that are fixed to both ends of the tubular case to close openings at the both ends of the tubular case, and
one or more partition walls that are fixed to a middle portion of the tubular case,
wherein
the lower case, the upper case, the end face plates, and the partition walls each include a pressed metal plate,
the lower case comprises:
a bottom plate,
a pair of side walls coupled to both sides of the bottom plate, and
coupling ribs coupled to respective upper end edges of the side walls,
wherein the bottom plate, the pair of side walls, and the coupling ribs together form a groove shape extending in a longitudinal direction of the tubular case,
each of the pair of end face plates is provided separately from the lower case, and comprises:
an end face wall,
a bottom welded piece on a lower edge of the end face wall, the bottom welded piece disposed in surface contact with, and welded onto, an inner surface of the bottom plate of the lower case facing an interior of the groove shape, and
a pair of side welded pieces at both side edges of the end face wall, each of the pair of side welded pieces disposed in surface contact with, and welded onto, an inner surface of a corresponding one of the pair of side walls of the lower case facing the interior of the groove shape,
the plurality of battery blocks are disposed in an orientation extending in the longitudinal direction of the tubular case, and fixed to the exterior case, and
the exterior case is further fixed to a vehicle,
wherein each of the pair of end face plates includes multiple metal plates together forming a multi-layered structure, and
each of the multiple metal plates is provided separately from the lower case, and comprises the end face wall, the bottom welded piece, and the pair of side welded pieces,
the multiple metal plates together forming the multi-layered structure include an outer metal plate positioned outside and an inner metal plate positioned inside,
upper ends of the outer metal plate and the inner metal plate are coupled by a welded structure, and
each of the outer metal plate and the inner metal plate is provided separately from the lower case, and comprises the end face wall, the bottom welded piece, and the pair of side welded pieces.
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