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|1. (WO2017156771) LOWER BOX BODY AND BATTERY BOX INCLUDING SAME|
|Applicants:||CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
|Title:||LOWER BOX BODY AND BATTERY BOX INCLUDING SAME|
The present application relates to the technical field of production of lithium ion batteries, in particular to a lower box body and a battery box including the lower box body. The lower box body comprises a shell and a reinforcing connection structure. The reinforcing connection structure comprises reinforcing connection members. The shell is enclosed by side walls, and a cavity is formed inside the shell. The shell is provided with connecting member perforations. The connecting member perforations are in communication with the cavity. The reinforcing connection members comprise a connecting member, a reinforcing member and a filling structure. The reinforcing member is provided in the cavity. The reinforcing member is provided with a connecting hole. The connecting member is connected to the connecting hole. The filling structure is used for filling a residual space of the cavity. The battery box comprises an upper cover, a battery pack and the lower box body. The battery pack is provided in the lower box body, and the battery pack is fixed to the lower box body. The upper cover closes the lower box body, and the upper cover is fixed to the lower box body. According to the present invention, on the one hand, the strength and the rigidity of the lower box body of the battery box can be guaranteed, and on the other hand, the weight of the battery box can be reduced, and the energy density is improved.