Battery box and battery pack

Abstract

Provided in the present application are a battery box and a battery pack. The battery box comprises at least two box bodies arranged in sequence. In the battery box, a groove is formed on at least one end edge of a side wall of each box body, and a groove opening is formed on the side of the groove facing an adjacent box body. The groove openings of the grooves of two adjacent box bodies face each other and together define a fixing cavity. A fixing member and a plurality of fasteners are disposed in the fixing cavity. The plurality of fasteners fixedly connect the fixing member to the side walls of the two adjacent box bodies, respectively.

Description

Battery box and battery pack

[0001] The present application claims priority to the Chinese patent application No. 202422395870.5, filed on September 29, 2024, to the Chinese Patent Office, the content of the above application being hereby incorporated by reference into the present application. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery pack, in particular to a battery box and a battery pack. BACKGROUND

[0003] In some battery boxes of battery pack, multiple layers of box bodies are sequentially stacked, and each box body is provided with battery cells. In order to realize the connection of adjacent box bodies, a protruding lug structure is arranged on the side wall of the box body, and the connection of adjacent box bodies is realized by fixedly connecting the corresponding lug structures on the two adjacent box bodies. SUMMARY

[0004] In the above scheme, the protruding lug structure needs to occupy the space outside the side wall of the box body, resulting in a larger space occupied by the battery box, which affects the structural compactness of the vehicle or equipment using the battery box, or the battery box is difficult to install in the vehicle or equipment.

[0005] Therefore, it is urgent to design a battery box and a battery pack to solve the technical problems.

[0006] In a first aspect, the present application provides a battery box, comprising at least two box bodies arranged in sequence, at least one end edge of the side wall of each box body is provided with a groove, the groove is provided with a notch towards one side of the adjacent box body, the notches of the grooves of the two adjacent box bodies are opposite to each other and constitute a fixed cavity, the battery box further comprises a fixing member located in the fixed cavity and a plurality of fasteners, and the plurality of fasteners fixedly connect the fixing member with the side walls of the two adjacent box bodies, respectively.

[0007] In a second aspect, the present application provides a battery pack, comprising battery cells and the above-mentioned battery box, and each box body of the battery box is provided with a plurality of battery cells. ADVANTAGEOUS EFFECTS

[0008] The battery box provided by the present application realizes the connection of adjacent box bodies through the fixing member and the plurality of fasteners embedded in the fixed cavity. Through this scheme, the occupied space of the battery box is reduced, the structural compactness is improved, and the battery box can be more easily installed in the vehicle or equipment.

[0009] The battery pack provided by the present application uses the above-mentioned battery box, which improves the structural compactness of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0010] The following drawings for the embodiments of the present application are hereby incorporated into this application as part of the present application for the purpose of understanding the present application. The embodiments of the present application and their description shown in the drawings are used to explain the principles of the present application. In the drawings,

[0011] Fig. 1 shows a schematic view of a battery box according to an embodiment;

[0012] Fig. 2 shows a schematic view of a box body and a fixing member in a battery box according to an embodiment;

[0013] Fig. 3 shows a sectional view of a battery box according to an embodiment;

[0014] Fig. 4 shows an enlarged view of a position where two box bodies in Fig. 3 are connected by a fixing member.

[0015] In the above drawings, the following reference signs are used:

[0016] 10, box body; 11, groove; 12, connecting hole; 13, left side wall; 14, right side wall; 15, front side wall; 16, rear side wall; 17, solid part; 18, hollow part;

[0017] 20, fixing member;

[0018] 31, fastener; 32, threaded sleeve;

[0019] 40, upper cover;

[0020] 50, connecting beam;

[0021] 60, connecting seat; 61, main body structure; 62, reinforcing plate;

[0022] 70, lifting lug. Embodiments of the present application

[0023] As shown in Figs. 1 to 4, the present application provides a battery box, which comprises at least two box bodies 10 arranged in sequence, at least one end edge of the side wall of each box body 10 is provided with a groove 11, the groove 11 is provided with a notch towards one side of the adjacent box body 10, the notches of the grooves 11 of the two adjacent box bodies 10 are opposite to each other and constitute a fixing cavity, the battery box further comprises a fixing member 20 located in the fixing cavity and a plurality of fasteners 31, the plurality of fasteners 31 respectively fix and connect the fixing member 20 and the side walls of the two adjacent box bodies 10.

[0024] In the scheme, at least one end edge of the side wall of each box 10 in the battery box is provided with a groove 11, the notches of the grooves 11 of two adjacent boxes 10 are opposite and constitute a fixed cavity, a fixing member 20 and a plurality of fasteners 31 are arranged in the fixed cavity, and the plurality of fasteners 31 respectively fix and connect the fixing member 20 and the side walls of the two adjacent boxes 10. In this way, the connection of the adjacent boxes 10 is realized by the fixing member 20 and the plurality of fasteners 31 embedded in the fixed cavity. Through the scheme, the occupied space of the battery box is reduced, the compactness of the structure is improved, and the battery box can be more easily installed in the vehicle or equipment.

[0025] As shown in FIGS. 3 and 4, neither the fixing member 20 nor the fastener 31 protrudes from the fixed cavity, so that the fixing member 20 and the fastener 31 do not occupy the space outside the outer surface of the box 10, so that the battery box is compact in structure. The fixing member 20 has a through hole, the bottom wall of the groove 11 has a connecting hole 12, and the fastener 31 passes through the through hole and cooperates with the connecting hole 12, so that the connection of the fixing member 20 and the box 10 is realized by a simple structure.

[0026] In an illustrative embodiment, the connecting hole 12 is a blind hole, so as not to affect the sealing of the side wall of the box 10. There needs to be sufficient thickness between the bottom surface of the blind hole and the inner surface of the box 10 to ensure the structural strength and sealing effect of the box 10. For example, the distance between the bottom surface of the blind hole and the inner surface of the box 10 is 2 mm.

[0027] Alternatively, in other embodiments not shown, the connecting hole 12 penetrates the bottom wall of the groove 11, and a sealing structure such as a sealing ring, sealing glue, etc. is arranged to seal the connecting position of the fastener 31 and the connecting hole 12, so as to ensure the sealing of the side wall of the box 10.

[0028] Specifically, the fastener 31 is a screw, and the battery box further comprises a threaded sleeve 32 fixed in the connecting hole 12, the hardness of the threaded sleeve 32 is greater than the hardness of the box 10, and the fastener 31 and the threaded sleeve 32 are threadedly connected.

[0029] Through the above arrangement, the reliable connection of the fastener 31 is ensured, and the connection failure is avoided. Among them, the side wall of the box 10 can be made of aluminum alloy material, and the threaded sleeve 32 and the fastener 31 can be made of steel material.

[0030] In a specific embodiment, the depth of the fixed cavity is 7 mm, the thickness of the fixing member 20 is 3 mm, and the thickness of the screw nut is 3.5 mm, so that the screw nut does not protrude from the outer surface of the box 10 after the screw is installed.

[0031] In some embodiments, the fixing member 20 is a long strip-shaped plate structure, and the shape of the fixing cavity matches the fixing member 20. The length direction of the fixing member 20 is the length direction of the side wall of the box body 10, so that the connection area is large and the connection strength is high.

[0032] In a specific embodiment, the fixing member 20 can be made of a cold-rolled steel plate. The fixing member 20 can be made of a whole plate or a plurality of spliced plates.

[0033] As shown in FIG. 2, the box body 10 is a cuboid structure, and the box body 10 includes oppositely arranged left and right side walls 13 and 14, and the left and right side walls 13 and 14 each have a groove 11. The battery box includes at least two fixing members 20, and the left and right side walls 13 and 14 are fixedly connected with different fixing members 20, respectively.

[0034] Through the above arrangement, the left and right sides of two adjacent box bodies 10 are fixedly connected by the fixing members 20, thereby ensuring the connection strength.

[0035] As shown in FIGS. 3 and 4, the side wall of the box body 10 is an extruded profile, and the extruded profile has a solid portion 17 and a hollow portion 18 connected with each other after extrusion molding. The hollow portion 18 has a plurality of weight-reducing holes extending along the length direction of the extruded profile, and the solid portion 17 is a solid structure. The groove 11 is arranged in the solid portion 17 of the extruded profile along the length direction of the extruded profile, rather than in the hollow portion 18, thereby ensuring the structural strength and the connection reliability with the fixing member 20.

[0036] In the present application, the battery box includes at least three box bodies 10, and the at least three box bodies 10 are connected in sequence in the vertical direction. Each box body 10 has a bottom wall and an upper opening. In the adjacent two box bodies 10, the bottom wall of the upper box body 10 seals the upper opening of the lower box body 10. The battery box further includes an upper cover 40, and the upper cover 40 seals the upper opening of the uppermost box body 10. In this way, the battery box has a multi-layer structure, is compact in structure, and can seal the upper opening of each box body 10.

[0037] As shown in FIG. 1, the box body 10 is a cuboid structure, and the box body 10 includes oppositely arranged left and right side walls 13 and 14 and oppositely arranged front and rear side walls 15 and 16. The groove 11 is arranged in the left side wall 13 and / or the right side wall 14. The battery box further includes a connecting beam 50, and the connecting beam 50 is arranged at the end of the front side wall 15 and / or the end of the rear side wall 16. Adjacent two connecting beams 50 on adjacent two box bodies 10 are fixedly connected.

[0038] The adjacent two box bodies 10 are connected by arranging the connecting beam 50, thereby further improving the structural strength and sealing performance of the battery box. The side wall of the box body 10 on which the connecting beam 50 is arranged should be a side wall with sufficient installation space.

[0039] Specifically, the connecting beam 50 is rectangular in cross section perpendicular to the length direction of the connecting beam 50, and the connecting beam 50 has a slot passing through along the length direction of the connecting beam 50, and the slot opening faces the outer surface of the battery box 10. By providing the slot, the material usage can be reduced, and the weight of the battery box can be reduced. The adjacent two connecting beams 50 on the adjacent two battery boxes 10 are connected by a plurality of connecting members such as bolts.

[0040] Further, the battery box 10 is a cuboid structure, and the battery box 10 includes oppositely arranged left and right side walls 13 and 14 and oppositely arranged front and rear side walls 15 and 16, and the recess 11 is located on the left side wall 13 and / or the right side wall 14; the battery box further includes a connecting seat 60, the connecting seat 60 is arranged on the front side wall 15 and / or the rear side wall 16, and the connecting seat 60 is used for fixed connection with the structure outside the battery box. The connecting seat 60 is used for connection with the chassis structure of the vehicle, so as to realize the installation of the battery box.

[0041] As shown in FIG. 1, the connecting seat 60 includes a main structure 61 and at least one reinforcing plate 62, the main structure 61 has at least one through hole and / or at least one through slot, the main structure 61 is fixedly connected with the battery box 10, and the reinforcing plate 62 is arranged obliquely relative to the outer surface of the battery box 10, one end of the reinforcing plate 62 is fixedly connected with the main structure 61, and the other end of the reinforcing plate 62 is fixedly connected with the battery box 10.

[0042] The through hole or the through slot on the main structure 61 can reduce the material usage and the weight of the structure under the premise of ensuring the structural strength. The number of the through hole or the through slot is set according to the size of the main structure 61 and the need. During installation, the main structure 61 is connected with the chassis or other structure of the vehicle by connecting members such as bolts, so as to realize the fixation of the battery box. By providing the reinforcing plate 62, the connection strength between the main structure 61 and the side wall of the battery box 10 is further strengthened, so as to ensure the carrying capacity of the connecting seat 60. The reinforcing plate 62 can be one; the reinforcing plate 62 can also be multiple and distributed on different sides of the main structure 61. The main structure 61 and the reinforcing plate 62 can be respectively machined by machining and then welded. Alternatively, the connecting seat 60 is an extruded profile structure formed by extrusion, and this kind of processing method has low processing cost.

[0043] As shown in FIG. 1, the box 10 is a cuboid structure, the box 10 comprises oppositely arranged left side wall 13 and right side wall 14 and oppositely arranged front side wall 15 and rear side wall 16, the recess 11 is located in the left side wall 13 and / or the right side wall 14; the battery box further comprises an ear 70, the ear 70 is arranged on the front side wall 15 and / or the rear side wall 16. Through the ear 70, it is convenient to connect with hoisting equipment, so as to hoist the battery box, thereby transporting or installing the battery box through hoisting. The ear 70 and the connecting seat 60 are not arranged on the left side wall 13 and the right side wall 14 of the box 10, thereby avoiding occupying the space on the left side or the right side of the box 10.

[0044] The application further provides a battery pack, the battery pack comprises battery cells and the above-mentioned battery box, and each box 10 of the battery box is provided with a plurality of battery cells.

[0045] In the scheme, at least one end of the side wall of each box 10 in the battery box is provided with a recess 11, and the adjacent two recesses 11 of the adjacent two boxes 10 form a fixed cavity, the fixed part 20 and the plurality of fasteners 31 are arranged in the fixed cavity, and the plurality of fasteners 31 respectively fix and connect the fixed part 20 and the side wall of the adjacent two boxes 10. In this way, the connection of the adjacent boxes 10 is realized through the fixed part 20 and the plurality of fasteners 31 embedded in the fixed cavity. The above-mentioned scheme reduces the occupied space of the battery pack, improves the compactness of the structure, and can more easily install the battery pack in the vehicle or the equipment.

Claims

1. A battery box, comprising at least two box bodies arranged in sequence, at least one end edge of a side wall of each of the box bodies is provided with a groove, a notch of the groove is arranged towards a side of an adjacent box body, the notches of the grooves of two adjacent box bodies are opposite and constitute a fixed cavity, the battery box further comprises a fixing member located in the fixed cavity and a plurality of fasteners, the plurality of fasteners respectively fix the fixing member and the side walls of the two adjacent box bodies.

2. The battery pack of claim 1, wherein, Neither the fixing member nor the fastener protrudes from the fixed cavity, the fixing member has a through hole, a bottom wall of the groove has a connecting hole, and the fastener passes through the through hole and cooperates with the connecting hole.

3. The battery pack of claim 2, wherein, The fastener is a screw, and the battery box further comprises a threaded sleeve fixed in the connecting hole, the hardness of the threaded sleeve is greater than the hardness of the box body, and the fastener and the threaded sleeve are threadedly connected.

4. The battery pack of claim 1, wherein, The fixing member is a long strip-shaped plate structure, and the shape of the fixed cavity matches the fixing member.

5. The battery pack of claim 1, wherein, The box body is a cuboid structure, the box body comprises left and right side walls arranged oppositely, and the left and right side walls each have the groove; the battery box comprises at least two fixing members, and the left and right side walls are respectively fixedly connected with different fixing members.

6. The battery pack of claim 1, wherein, The side wall of the box body is an extruded profile, the extruded profile has a solid part and a hollow part connected to each other after being extruded, the hollow part has a plurality of lightening holes extending along the length direction of the extruded profile, and the solid part is a solid structure, wherein the groove is arranged in the solid part along the length direction of the extruded profile.

7. The battery pack of claim 1, wherein, The battery box comprises at least three box bodies connected in sequence in the vertical direction, each of the box bodies has a bottom wall and an upper opening, in two adjacent box bodies, the bottom wall of the upper box body blocks the upper opening of the lower box body, and the battery box further comprises an upper cover blocking the upper opening of the uppermost box body.

8. The battery pack of claim 1, wherein, The box body is a cuboid structure, the box body comprises left and right side walls arranged oppositely and front and rear side walls arranged oppositely, and the groove is located in the left and / or right side wall; the battery box further comprises a connecting beam arranged at an end portion of the front side wall and / or an end portion of the rear side wall, and two adjacent connecting beams on two adjacent box bodies are fixedly connected.

9. The battery pack of claim 8, wherein, The connecting beam is rectangular in cross section perpendicular to the length direction thereof, the connecting beam has a through slot along the length direction thereof, and a notch of the through slot faces the outer surface of the box body.

10. The battery pack of claim 1, wherein, The box body is a cuboid structure, the box body comprises left and right side walls arranged oppositely and front and rear side walls arranged oppositely, and the groove is located in the left and / or right side wall; the battery box further comprises a connecting seat arranged at the front side wall and / or the rear side wall, and the connecting seat is used for fixedly connecting with a structure outside the battery box.

11. The battery pack of claim 10, wherein, The connecting seat comprises a main body structure and at least one reinforcing plate, the main body structure has at least one through hole and / or at least one through slot, the main body structure is fixedly connected with the box body, the reinforcing plate is arranged obliquely relative to the outer surface of the box body, one end of the reinforcing plate is fixedly connected with the main body structure, and the other end of the reinforcing plate is fixedly connected with the box body.

12. The battery pack of claim 1, wherein, The box body is a cuboid structure, the box body comprises oppositely arranged left and right side walls and oppositely arranged front and rear side walls, and the recess is located on the left side wall and / or the right side wall; the battery box further comprises an ear, the ear is arranged on the front side wall and / or the rear side wall, and the ear is used for connecting hoisting equipment.

13. The battery pack of any one of claims 2-12, wherein, The connecting hole is a blind hole.

14. The battery pack of claim 12, wherein, The distance between the bottom surface of the blind hole and the inner surface of the box body is 2 mm.

15. The battery box of any one of claims 2-12, wherein, The connecting hole penetrates the bottom wall of the recess.

16. The battery box of any one of claims 2-12, wherein, The depth of the fixing cavity is 7 mm, the thickness of the fixing piece is 3 mm, and the thickness of the screw nut is 3 mm or 5 mm.

17. The battery box of any one of claims 2-12, wherein, The fixing piece comprises a cold-rolled steel plate.

18. The battery box of any one of claims 2-12, wherein, The side wall of the box body comprises an aluminum alloy material.

19. The battery box of any one of claims 2-12, wherein, The connecting seat is an extruded profile structure.

20. A battery pack, comprising a battery cell and the battery box according to any one of claims 1-19, and a plurality of battery cells are arranged in each of the box bodies of the battery box.

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