Battery pack box body, battery pack and electric vehicle

Abstract

The invention provides a battery pack box body, a battery pack and an electric vehicle. The battery pack box body comprises at least one box body and a mounting piece which is connected with the box body and is used for being connected with an external load; the box body is provided with at least one heat management partition plate, the heat management partition plate divides the box body into multiple layers of accommodating units, the multiple layers of accommodating units are arranged in a stacked mode in the first direction, and the first direction is the height direction of the battery pack box body; and at least one structural beam is arranged in the accommodating unit, and the accommodating unit is divided into a plurality of accommodating cavities for accommodating pole core components by the structural beams. The battery pack box body disclosed by the invention has the advantages of higher space utilization rate, higher structural strength, better heat management performance, simple structure and high production efficiency. In addition, combination and assembly can be carried out according to design requirements, and high flexibility and universality are achieved.

Description

technical field [0001] The present application relates to the battery field, in particular to a battery pack case, a battery pack and an electric vehicle. Background technique [0002] With the continuous popularization of new energy vehicles, the requirements for the use of power batteries in new energy vehicles are becoming higher and higher. The traditional battery pack is to install the battery module into the battery pack box to form a battery pack structure. Wherein, the battery module includes a battery pack composed of a plurality of single cells arranged in sequence, side plates arranged on both sides of the battery pack, and end plates arranged at both ends of the battery pack. The side plate and the end plate are connected by means of bolts, pull rods or welding, so as to realize the fixing of the battery pack. After the battery module is assembled, it is installed in the battery pack box through fasteners such as bolts, and in order to improve the strength of t...

AI Technical Summary

Problems solved by technology

Due to the addition of structural parts such as end plates, side plates, beams, longitudinal beams, and fasteners, the weight of the entire battery pack is relatively large, and the utilization rate of the internal space of the battery pack is also reduced, making its energy density unable to meet the needs of users for electric vehicles. The needs of the car's battery life

Moreover, this structure also has a cumbersome assembly process and complicated assembly procedures. The battery needs to be assembled into a battery module first, and then the battery module is installed in the battery pack box, resulting in an increase in manpower and material costs.

[0003] In addition, the battery pack box is usually composed of a tray and an upper cover. The tray is assembled and welded by multiple side beams and bottom plates. In order to ensure that the tray has sufficient structural strength, some reinforcing beams and longitudinal beams are generally welded inside the tray Beam structure, however, this design leads to too many parts of the battery pack box, complex structure, low space utilization, and the need to connect the parts through welding and other processes, which will also lead to higher manufacturing costs

In addition, most battery pack boxes are single-layer structures, and the space utilization rate of single-layer battery pack boxes is low

In addition, the battery pack case and thermal management structure are designed independently, resulting in deviations in the manufacturing and assembly process, resulting in low thermal management efficiency and difficult manufacturing process and quality control

In addition, the battery pack box has not been designed in a standardized manner, and it cannot be combined and matched according to actual needs, so as to realize rapid assembly according to different needs

The existing battery pack box does not have the versatility and flexibility of use

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