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CN-224232832-U - Battery device, power utilization device and connecting piece

CN224232832UCN 224232832 UCN224232832 UCN 224232832UCN-224232832-U

Abstract

The application provides a battery device, an electric device and a connecting piece. The plate assembly is provided with a through fixing through hole. At least part of the mounting structure is positioned at one side of the fixing through hole along the penetrating direction of the fixing through hole, and at least part of the mounting structure and the plate assembly enclose together to form a mounting space. At least part of the battery cell is positioned in the installation space. The connecting piece includes first face and second face, and fixed through-hole is worn to locate by the part of connecting piece so that first face and mounting structure friction welding fix, and part of board subassembly is located between mounting structure and the second face, and second face and board subassembly friction welding fix. According to the battery device provided by the embodiment of the application, the fixing structures such as the screw threads and the like are not required to be prepared in advance on the mounting structure and the connecting piece, and the structures of the mounting structure and the connecting piece are not required to be damaged in the mounting process, so that the stress concentration is reduced.

Inventors

  • TANG LICHUAN
  • LEI JING
  • YU QIAN

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260224

Claims (16)

  1. 1. A battery device, characterized by comprising: The plate assembly is provided with a through fixing through hole; The mounting structure is at least partially positioned at one side of the fixing through hole along the penetrating direction of the fixing through hole, and at least part of the mounting structure and the plate assembly enclose together to form a mounting space; A battery cell at least partially located within the mounting space; the connecting piece comprises a first surface and a second surface, a part of the connecting piece penetrates through the fixing through hole so that the first surface is fixed with the mounting structure in a friction welding mode, a part of the plate assembly is located between the mounting structure and the second surface, and the second surface is fixed with the plate assembly in a friction welding mode.
  2. 2. The battery device of claim 1, wherein an outer surface of a side of the plate assembly facing away from the mounting structure includes a first contact surface, the first contact surface being a continuous surface, at least a portion of the second surface being friction welded to the first contact surface.
  3. 3. The battery device of claim 1, wherein at least a portion of the second face surrounds a peripheral side of the fixing through hole that is open on a side facing away from the mounting structure.
  4. 4. The battery device of claim 1, wherein the outer surface of the mounting structure adjacent to the side of the plate assembly includes a second contact surface, the second contact surface being a continuous surface, the first surface being friction welded to the second contact surface.
  5. 5. The battery device according to claim 1, wherein the plate assembly includes a plurality of plate structures stacked one on another, the plate structures being provided with mounting through holes penetrating the plate structures, the mounting through holes of the respective plate structures being communicated with one another in a stacking direction to form the fixing through holes.
  6. 6. The battery device of claim 5, wherein a plurality of the plate structures include a thermal management assembly and a shield, at least a portion of the thermal management assembly being located between the mounting structure and the shield, at least a portion of the second face being located on a side of the shield facing away from the thermal management assembly.
  7. 7. The battery device of claim 1, wherein the mounting structure comprises a plurality of box side beams, a plurality of box side beams are arranged in an end-to-end manner to form a mounting cavity, one side of the mounting cavity is open, and the plate assembly covers the open position of the mounting cavity to form the mounting space.
  8. 8. An electricity consumption device, characterized in that it comprises a battery device according to any one of claims 1 to 7 for use as a power source for the electricity consumption device.
  9. 9. A connector for a battery device according to any one of claims 1 to 7, characterized in that the connector comprises: The connecting part comprises a connecting body and a first bulge, wherein the connecting body extends along a first direction, the first bulge is arranged on the end face of the connecting body along the first direction, the first bulge protrudes out of the connecting body along the first direction, and the first bulge is used for being in friction welding with the mounting structure to form a first face; And the flange part is positioned at one side of the connecting body along the second direction, the first direction is intersected with the second direction, and the surface of the flange part, which is close to one side of the first bulge along the first direction, is used for forming a second surface.
  10. 10. The connector of claim 9, wherein the projection of the first protrusion along the first direction is annular in a plane of projection perpendicular to the first direction.
  11. 11. The connector of claim 10, wherein the number of first protrusions is a plurality, at least one of the first protrusions surrounding an outer side of another of the first protrusions.
  12. 12. The connector of claim 9, wherein the first protrusion has a cross-section perpendicular to the first direction that gradually increases in area in a direction approaching the connector body.
  13. 13. The connector of claim 9, wherein the flange portion includes a flange body and a second protrusion, the flange body being located on a side of the connector body in a second direction, the second protrusion being located on a side of the flange body adjacent to the first protrusion in the first direction, the second protrusion protruding from the flange body in the first direction, the second protrusion being for friction welding with a panel assembly to form a second face.
  14. 14. The connector of claim 13, wherein the projection of the second protrusion along the first direction in a projection plane perpendicular to the first direction is annular, the second protrusion encircling the connector body.
  15. 15. The connector of claim 14, wherein the number of said second protrusions is a plurality, at least one of said second protrusions surrounding an outer side of another of said second protrusions.
  16. 16. The fitting according to claim 13, wherein, in a direction approaching said flange body in said first direction, an area of a cross section of said second projection perpendicular to said first direction increases gradually.

Description

Battery device, power utilization device and connecting piece Technical Field The present application relates to battery technology, and more particularly, to a battery device, an electric device, and a connector. Background In the related art, the plate assembly and the mounting structure are fixed by means of bolts and sealing washers such that the plate assembly and the mounting structure form a part of the case assembly of the battery device and achieve sealing from the outside. In addition, in the process of fastening the bolts, stress concentration is easily generated in local areas of the connection positions, so that the sealing positions and the sealing gaskets are damaged. Disclosure of utility model The embodiment of the application provides a battery device, an electric device and a connecting piece, which are beneficial to achieving the aim of simplifying the manufacturing and assembling process of the battery device. The technical scheme of the embodiment of the application is realized as follows: An embodiment of the present application provides a battery device including: The plate assembly is provided with a through fixing through hole; The mounting structure is at least partially positioned at one side of the fixing through hole along the penetrating direction of the fixing through hole, and at least part of the mounting structure and the plate assembly enclose together to form a mounting space; A battery cell at least partially located within the mounting space; the connecting piece comprises a first surface and a second surface, a part of the connecting piece penetrates through the fixing through hole so that the first surface is fixed with the mounting structure in a friction welding mode, a part of the plate assembly is located between the mounting structure and the second surface, and the second surface is fixed with the plate assembly in a friction welding mode. According to the battery device, the first surface of the connecting piece is fixed with the mounting structure through friction welding, so that the second surface of the connecting piece and the mounting structure can limit the relative position of the plate assembly and the mounting structure together, the connecting piece is fixedly connected with the mounting structure through friction welding, fixing structures such as threads are not required to be prepared on the mounting structure and the connecting piece in advance, the structures of the mounting structure and the connecting piece are not required to be damaged in the mounting process, the connecting piece is in surface contact with the mounting structure, stress concentration is reduced, friction welding operation can be conducted after the connecting piece is inserted into the fixing through hole, operation steps are simplified, production efficiency is improved, the connecting piece can directly connect the plate assembly and the mounting structure, and accordingly the relative position of the plate assembly and the mounting structure can be better, and connection stability is improved. In some embodiments, an outer surface of a side of the plate assembly facing away from the mounting structure includes a first contact surface, the first contact surface being a continuous surface, at least a portion of the second surface being friction welded to the first contact surface. Therefore, the production process of the first contact surface is facilitated to be simplified, meanwhile, the contact area between the first contact surface and the connecting piece in the friction welding process is also facilitated to be increased, the size of the second surface is increased, and the connection strength is improved. In some embodiments, at least a portion of the second face surrounds a perimeter of the fixation hole that is open on a side facing away from the mounting structure. Therefore, the welding area between the connecting piece and the plate assembly seals the outer space of the fixing through hole and the plate assembly, the risk that the battery monomer is damaged due to the fact that the outer foreign matters enter the installation space through the fixing through hole is reduced, additional sealing parts are not needed, and the number of parts of the battery device is reduced. In some embodiments, the outer surface of the mounting structure adjacent to one side of the plate assembly includes a second contact surface, the second contact surface being a continuous surface, the first surface being friction welded to the second contact surface. Therefore, the production process of the second contact surface is facilitated to be simplified, meanwhile, the contact area between the second contact surface and the connecting piece in the friction welding process is also facilitated to be increased, the size of the first surface is increased, and the connection strength is improved. In some embodiments, the plate assembly includes a plurality of plate structures stacked one