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CN-224217616-U - Battery box, battery package and vehicle

CN224217616UCN 224217616 UCN224217616 UCN 224217616UCN-224217616-U

Abstract

The battery box comprises a battery box body and a bottom guard plate arranged at the bottom of the battery box body, wherein the bottom of the battery box body is provided with a first area and a second area surrounding the periphery of the first area, the first area is provided with a connecting structure, the connecting structure is at least one of a magnet, a sticking buckle and a snap fastener, the battery box body is connected with the bottom guard plate in the first area through the connecting structure, and is connected with the bottom guard plate in the second area through bolts. Through above-mentioned structural design, the bolting structure between first region and the end backplate of this disclosure reduction or cancellation battery case body bottom reduces the requirement to the wall thickness of battery case body part structure when arranging bolted connection structure to realize size reduction, weight reduction and material cost's reduction, be favorable to increasing the energy density of battery package, and be favorable to realizing lightweight design.

Inventors

  • YAN LIANG

Assignees

  • 小米汽车科技有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (10)

  1. 1. The battery box body is characterized by comprising a battery box body (400) and a bottom guard plate (100) arranged at the bottom of the battery box body (400), wherein the bottom of the battery box body (400) is provided with a first area (401) and a second area (402) surrounding the periphery of the first area (401), the first area (401) is provided with a connecting structure, the connecting structure is at least one of a magnet (310), a sticking buckle and a snap fastener, and the battery box body (400) is connected with the bottom guard plate (100) in the first area (401) through the connecting structure and is connected with the bottom guard plate (100) in the second area (402) through bolts.
  2. 2. The battery box body according to claim 1, wherein the battery box body (400) comprises a frame (200) and a beam structure (300), wherein the frame (200) encloses a containing space of the battery box body, the bottom surface of the frame (200) is the second area (402), the beam structure (300) is arranged in the containing space, and the bottom surface of the beam structure (300) is the first area (401).
  3. 3. The battery case according to claim 2, wherein: The beam structure (300) comprises a first beam (301) extending along a first direction, the first beam (301) divides the accommodating space into a battery compartment and an electric compartment, the battery compartment is used for accommodating battery cells, the electric compartment is used for accommodating electric components, wherein the beam structure (300) further comprises a second beam (302) extending along a second direction perpendicular to the first direction, the connecting structure is arranged on the bottom surface of the second beam (302), and/or The beam structure (300) comprises a first beam (301) extending along a first direction, wherein the first beam (301) divides the accommodating space into a battery compartment and an electric compartment, the battery compartment is used for accommodating battery cells, the electric compartment is used for accommodating electric components, the connecting structure is arranged on the bottom surface of the first beam (301), and/or The beam structure (300) is provided with at least two of said connection structures, which are arranged at intervals along the extension direction of the beam structure (300), and/or The beam structure (300) is connected to the bottom guard plate (100) via bolts.
  4. 4. The battery box according to claim 2, characterized in that the battery box comprises at least two of the beam structures (300) arranged in parallel, wherein for at least two of the beam structures (300) arranged in parallel: All the beam structures (300) are respectively provided with the connecting structures, or At least one of the beam structures (300) is provided with the connection structure, at least one other of the beam structures (300) is not provided with the connection structure.
  5. 5. The battery box according to claim 2, wherein the connection structure includes a magnet (310), a buffer layer (330) is provided on a bottom surface of the beam structure (300), an assembly groove (331) is provided on a bottom surface of the buffer layer (330), and the magnet (310) is disposed in the assembly groove (331).
  6. 6. The battery case according to claim 5, wherein: The assembly slot is a through slot penetrating the buffer layer (330), the top surface of the magnet (310) is connected with the bottom surface of the beam structure (300), and/or The material of the buffer layer (330) is rubber or silica gel.
  7. 7. The battery box body according to claim 1, wherein the battery box body (400) comprises a frame (200), a beam structure (300) and a bottom plate (410), the frame (200) is arranged on the top surface of the bottom plate (410) and encloses a containing space of the battery box body together, the beam structure (300) is arranged on the top surface of the bottom plate (410) and is located in the containing space, the bottom guard plate (100) is arranged on the bottom surface of the bottom plate (410), the area, corresponding to the beam structure (300), of the bottom surface of the bottom plate (410) is the first area (401), and the area, corresponding to the frame (200), is the second area (402).
  8. 8. The battery case according to claim 1, wherein the bottom cover (100) is made of stainless steel, and the top surface (101) of the bottom cover (100) is rough-milled so that the surface roughness Ra of the top surface (101) is 12.5 μm or more.
  9. 9. A battery pack, characterized in that the battery pack comprises the battery case according to any one of claims 1 to 8.
  10. 10. A vehicle is characterized in that, the vehicle comprising the battery pack of claim 9.

Description

Battery box, battery package and vehicle Technical Field The disclosure relates to the technical field of power batteries for vehicles, and particularly relates to a battery box, a battery pack and a vehicle. Background The bottom guard board arranged at the bottom or the top of the battery pack plays an important role in the aspects of preventing the battery pack from being impacted by sundries, keeping waterproof, dustproof, heat protection performance and the like. The traditional bottom guard board is usually fixedly connected with the frame and the longitudinal beam of the battery box body in a bolt fixing mode. However, such fixing means requires that the side member of the battery case have a wide wall thickness so that it has a sufficient size to configure the screw hole to be fitted with the bolt, resulting in an increase in the size and weight of the side member, affecting the energy density of the battery pack, being disadvantageous for lightweight design, and high material cost. In addition, when the battery pack adopts the bolt fixing mode to fix the bottom guard plate, the structural reliability of the bottom guard plate or the battery box body can be influenced due to the fact that the number of the bolts is large, and the maintenance cost is high. Another existing bottom guard plate fixing scheme only adopts bolt fixing between the frame and the bottom guard plate, and a connecting structure is not arranged between the longitudinal beam and the bottom guard plate. However, such fixing methods have the problem of abnormal sound under the working condition of the whole vehicle caused by the lack of a connection relationship in the middle of the bottom guard plate or the sagging of gravity, and the thickness of the bottom guard plate needs to be further thickened to enhance the rigidity of the bottom guard plate so as to relieve the problem of abnormal sound, so that the problems of weight increase and higher material cost still result. Disclosure of utility model To overcome the problems in the related art, the present disclosure provides a battery case, a battery pack, and a vehicle. According to a first aspect of the disclosed embodiments, a battery box body is provided, which comprises a battery box body and a bottom guard plate arranged at the bottom of the battery box body, wherein the bottom of the battery box body is provided with a first area and a second area surrounding the periphery of the first area, the first area is provided with a connecting structure, the connecting structure is at least one of a magnet, a sticking buckle and a snap fastener, the battery box body is connected with the bottom guard plate in the first area through the connecting structure, and is connected with the bottom guard plate in the second area through bolts. In some exemplary embodiments of the disclosure, the battery box body includes a frame and a beam structure, the frame encloses an accommodating space of the battery box body, a bottom surface of the frame is the second area, the beam structure is disposed in the accommodating space, and a bottom surface of the beam structure is the first area. In some exemplary embodiments of the present disclosure, the beam structure includes a first beam extending in a first direction, the first beam separating the accommodating space from a battery compartment for accommodating battery cells and an electrical compartment for accommodating electrical components, the beam structure further includes a second beam extending in a second direction perpendicular to the first direction, the connection structure is disposed on a bottom surface of the second beam, and/or the beam structure includes a first beam extending in the first direction, the first beam separating the accommodating space from a battery compartment for accommodating battery cells and the electrical compartment for accommodating electrical components, the connection structure is disposed on a bottom surface of the first beam, and/or the beam structure is provided with at least two connection structures, the at least two connection structures are disposed at intervals along the extending direction of the beam structure, and/or the beam structure is connected with the bottom guard via bolts. In some exemplary embodiments of the present disclosure, the battery case includes at least two of the beam structures arranged in parallel, wherein the connection structures are respectively provided for all of the beam structures for the at least two of the beam structures arranged in parallel, or at least one of the beam structures is provided with the connection structures, and at least one other of the beam structures is not provided with the connection structures. In some exemplary embodiments of the present disclosure, the connection structure includes a magnet, a bottom surface of the beam structure is provided with a buffer layer, a bottom surface of the buffer layer is provided with an assembly groove, and