Battery pack box body side beam, battery pack and electric automobile

Abstract

The invention discloses a battery pack box body side edge beam, a battery pack and an electric automobile, the battery pack box body side edge beam comprises a first rigid part, an energy absorption part and a second rigid part, the first rigid part is used for being connected with an automobile body, the energy absorption part is connected between the first rigid part and the second rigid part, and the energy absorption part is of a deformable structure. According to the battery pack box body side edge beam, the battery pack and the electric automobile, due to the fact that the first rigid part, the energy absorption part and the second rigid part are designed, the first rigid part has enough rigidity, and it is guaranteed that a first defensive line with large rigidity is integrally formed after the first rigid part is connected with the automobile body threshold beam; the first rigid part is used for resisting the situation that extrusion force cannot be dispersed due to premature local collapse during external collision, the energy absorption part can buffer and absorb residual collision energy transmitted by the first defensive line, collision deformation is blocked at the energy absorption part to reduce extrusion to the battery cell, and the second rigid part has high rigidity to reduce deformation so as to protect the battery cell.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a side beam of a battery pack box body, a battery pack and an electric vehicle. Background technique [0002] At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. As well as large and medium-sized pure electric passenger vehicles such as electric tools, the safety performance requirements of lithium-ion batteries are getting higher and higher. [0003] The power battery system is the energy storage and supply system of pure electric passenger vehicles. It is an important component of pure electric passenger vehicles. Auxiliary components. Therefore, the space layout of the power battery system box is relatively strict...

AI Technical Summary

Problems solved by technology

The first type is the sheet metal stamping and tailor-welded box, but it has many solder joints, low production capacity, and the welding quality control is difficult, and it is prone to air tightness or strength not up to standard; the second type is the sheet metal bending box, box The body weight is relatively large, and the assembly limitations are too narrow, and it is generally suitable for commercial vehicles; the third type, the one-piece die-casting box, has a large overall size that brings severe challenges to the die-casting process. After die-casting, the strength of the material itself is reduced and it is more brittle , it is easy to cause collision fracture, and the die-casting efficiency is low, and the die-casting mold cost is high; the fourth type, the aluminum profile tailor-welded box, the welding strength and air tightness are difficult to guarantee, and the strength of the aluminum profile under the collision condition is difficult to meet the requirements

Images