CN-122025969-A - Battery pack shell and battery pack

CN122025969ACN 122025969 ACN122025969 ACN 122025969ACN-122025969-A

Abstract

The application relates to the field of batteries and discloses a battery pack shell and a battery pack. The battery pack shell comprises a mould upper cover, a reinforcing structure and a reinforcing structure, wherein the mould upper cover comprises a main body part and a connecting part, the main body part comprises a wall plate and a containing cavity with an opening surrounded by the wall plate, the containing cavity is used for containing a battery cell, the connecting part is positioned outside the containing cavity and connected with the wall plate, the connecting part is arranged around the opening, the reinforcing structure is arranged at the connecting part, the rigidity of the reinforcing structure is larger than that of the connecting part, the reinforcing structure is arranged at the connecting part to strengthen the rigidity and the bending strength of the mould upper cover, the deformation and torsion risk of the mould upper cover under the impact of external force is reduced, the structural strength of the battery pack shell is enhanced, and the reliability of the battery pack shell is improved.

Inventors

TANG YABIN
DU ZHIQUAN
GUO XIAOCHUAN
TIAN FEI

Assignees

北京维盛复合材料有限公司

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (12)

1. A battery pack case, comprising: The die upper cover comprises a main body part and a connecting part, wherein the main body part comprises a wall plate and a containing cavity with one end being opened and surrounded by the wall plate, the containing cavity is used for containing a battery cell, the connecting part is positioned outside the containing cavity and connected with the wall plate, and the connecting part is arranged around the opening; The reinforcing structure is arranged on the connecting portion, and the rigidity of the reinforcing structure is larger than that of the connecting portion.
2. The battery pack case according to claim 1, wherein the connection portion includes two mount sections and two connection sections connected to each other, the two mount sections are disposed opposite to each other in a first direction, the two connection sections are disposed opposite to each other in a second direction, the first direction intersects with the second direction, the mount sections are configured to be connected to an external structure, and the reinforcing structure is disposed in the mount sections.
3. The battery pack housing as in claim 2 wherein the reinforcement structure extends continuously and is disposed around the opening.
4. The battery pack case according to claim 1, wherein the reinforcing structure is provided inside the connecting portion.
5. The battery pack housing as claimed in claim 4, wherein the outer surface of the reinforcement structure is provided with at least one groove, at least part of the connection portion is received in the groove, and/or the outer surface of the reinforcement structure is provided with at least one protrusion, at least part of the protrusion extending into the connection portion.
6. The battery pack case according to claim 1, wherein the reinforcing structure is bonded to at least one side of the connecting portion in the thickness direction thereof.
7. The battery pack case according to claim 6, wherein the reinforcing structure is provided at a side of the connection portion facing away from the opening, the reinforcing structure including a first wall portion, a second wall portion, and a third wall portion that are connected to each other, the first wall portion being connected to the connection portion, the second wall portion being connected to the wall plate, one end of the third wall portion being connected to one end of the second wall portion facing away from the first wall portion, and the other end thereof being inclined to extend to one end of the first wall portion facing away from the second wall portion.
8. The battery pack case according to claim 7, wherein the reinforcement structure further includes a support rib and a chamber surrounded by the first wall portion, the second wall portion, and the third wall portion, the support rib being disposed in the chamber, the support rib including a fixed end and a free end disposed opposite to each other, the fixed end and the third wall portion being connected, the free end extending obliquely toward the second wall portion and abutting against a middle portion of the second wall portion.
9. The battery pack housing of claim 1 further comprising a bottom guard for closing the opening and a fastening structure for connecting the bottom guard and the molded upper cover, wherein at least a portion of the fastening structure is embedded in the reinforcing structure.
10. The battery pack housing of claim 1, wherein the battery pack further comprises a bottom guard plate for covering the opening, the reinforcing structure is disposed on a side of the connecting portion adjacent to the opening and surrounding the opening, a seal groove is disposed on a side of the reinforcing structure facing away from the connecting portion, the seal groove is for accommodating a glue for bonding the bottom guard plate and the reinforcing structure.
11. The battery pack housing of claim 1 wherein the reinforcement structure comprises a thermoset resin matrix and a filler disposed within the thermoset resin matrix, the filler comprising at least one of carbon fibers and glass fibers.
12. A battery pack comprising a battery cell and a battery pack housing as claimed in any one of claims 1 to 11, wherein the battery cell is accommodated in the accommodation chamber.

Description

Battery pack shell and battery pack Technical Field The application belongs to the field of batteries, and particularly relates to a battery pack shell and a battery pack. Background With the rapid development of new energy industry, battery packs are widely used for electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like as core energy storage components. With the increasing demand of users for energy density of battery packs, compression molded battery cans are increasingly gaining importance by virtue of their light weight. However, the structure strength of the battery pack shell formed by compression molding is insufficient, the battery pack shell is easy to deform and damage under the impact of external force, and the reliability of the battery pack shell formed by compression molding still needs to be improved. Disclosure of Invention The embodiment of the application provides a battery pack shell and a battery pack, which can improve the structural strength of a molded upper cover and improve the reliability of the battery pack shell. In a first aspect, an embodiment of the application provides a battery pack shell, which comprises a molded upper cover, and a reinforcing structure, wherein the molded upper cover comprises a main body part and a connecting part, the main body part comprises a wall plate and a containing cavity with an opening surrounded by the wall plate, the containing cavity is used for containing a battery unit, the connecting part is positioned outside the containing cavity and connected with the wall plate, the connecting part is arranged around the opening, and the reinforcing structure is arranged at the connecting part and has rigidity larger than that of the connecting part. In the scheme of the embodiment of the application, the battery pack shell comprises a mould upper cover, wherein the mould upper cover comprises a main body part and a connecting part, the main body part comprises a wall plate and a containing cavity surrounded by the wall plate and used for containing a battery monomer, the connecting part is arranged around an opening and used for being connected with other structures, and the battery pack shell also comprises a reinforcing structure, the rigidity of the reinforcing structure is greater than that of the connecting part, and the reinforcing structure is arranged on the connecting part so as to enhance the rigidity and the bending strength of the mould upper cover, reduce the deformation and torsion risk of the mould upper cover under the impact of external force, enhance the structural strength of the battery pack shell and improve the reliability of the battery pack shell. In some embodiments, the connection portion includes two mounting segments and two connection segments that are connected to each other, the two mounting segments are disposed opposite along a first direction, the two connection segments are disposed opposite along a second direction, the first direction and the second direction intersect, the mounting segments are configured to be connected to an external structure, and the reinforcement structure is disposed on the mounting segments. In the scheme of the embodiment of the application, the mounting section of the connecting part is used for being connected with an external structure, the mounting section is a main stress part of the connecting part, and the reinforcing structure is arranged on the mounting section, so that the rigidity and the bending strength of the mounting section are effectively improved, the size of the reinforcing structure is reduced, and the material cost of the battery pack shell is saved. In some embodiments, the reinforcing structure extends continuously and is disposed around the opening. In the scheme of the embodiment of the application, the reinforcing structure continuously extends and is arranged around the opening so as to enhance the integral rigidity and the bending strength of the connecting part and improve the reliability of the battery pack shell. In some embodiments, the reinforcing structure is disposed inside the connection portion. In the scheme of the embodiment of the application, the reinforcing structure and the connecting part are integrally formed and are arranged in the connecting part, the contact area between the reinforcing structure and the connecting part is large, and the connecting part fully constrains the reinforcing structure, thereby being beneficial to fully playing the reinforcing role of the reinforcing structure on the connecting part, enhancing the structural strength of the battery pack shell and improving the reliability of the battery pack shell. In some embodiments, the outer surface of the reinforcing structure is provided with at least one groove, at least part of the connecting portion is re