Cross beam assembly, lower box body, box body and battery pack

Abstract

The invention relates to the technical field of batteries, in particular to a cross beam assembly, a lower box body, a box body and a battery pack. The lower box body comprises a fixed beam, a movable beam and a first fastener, the fixed beam is provided with an inclined plane, the movable beam is provided with a second inclined plane capable of sliding along the first inclined plane, the movable beam is provided with a first strip-shaped hole extending in the moving direction of the movable beam relative to the fixed beam, and the first fastener penetrates through the first strip-shaped hole and is detachably connected to the fixed beam; therefore, the fixed beam and the movable beam are relatively fixed. By adjusting the distance between the movable beam and the fixed beam, the fixed beam and the movable beam are both matched with the box body frame of the lower box body to abut against the battery cell group, and compared with the prior art, the assembly tolerance can be absorbed, so that the battery cell is in rigid contact with the box body frame and the cross beam assembly; the situation that the tab busbar is torn due to the fact that the battery cell on the outermost side of the battery cell set inclines is avoided, the reliability of the structure is guaranteed, and the consistency of expansion deformation of all the battery cells is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a crossbeam assembly, a lower box and a battery pack. Background Art

[0002] CTP (cell to Pack) technology is a module-free battery pack structure technology.

[0003] At present, battery cells are placed into the corresponding area of ​​the box by “squeezing into the box”. The so-called “squeezing into the box” is to design a hard recoil frame between the battery cells in the battery cell group to create space to offset the expansion of the battery cells, and elastic foam is designed on the outside of the two outermost battery cells of the battery cell group. The battery cell group is placed in the box by squeezing the elastic foam, and the two outermost battery cells are fit to the box through the rebound of the elastic foam. However, the rebound deformation of the elastic foam is generally large, much greater than the expansion deformation of the battery cell. The elastic foam is difficult to effectively support the outermost battery cell. The outermost battery cell is prone to skew and tear the tab bus, affecting the stability of the structure. Moreover, the expansion deformation of the outermost battery cell is greater than that of the inner battery cell, affecting the consistency of the battery cell.

[0004] Therefore, there is an urgent need for a crossbeam assembly, a lower box, a box and a battery pack to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present disclosure provides a crossbeam assembly, a lower box, a box and a battery pack.

[0006] In a first aspect, the present disclosure provides a crossbeam assembly suitable for a lower box body of a battery pack, comprising a fixed beam, a movable beam and a first fastener, wherein the fixed beam is provided with a first inclined surface, the movable beam is provided with a second inclined surface capable of sliding along the first inclined surface, the movable beam is provided with a first strip hole extending along a moving direction of the movable beam relative to the fixed beam, and the first fastener is detachably connected to the fixed beam through the first strip hole.

[0007] A first fitting surface capable of fitting with the battery cell is arranged on a side of the fixed beam away from the movable beam; a second fitting surface capable of fitting with the battery cell is arranged on a side of the movable beam away from the fixed beam.

[0008] The fixed beam is provided with a plurality of reinforcing ribs, each of which has the first inclined surface; the movable beam has a plurality of first protrusions, each of which has the second inclined surface; and the reinforcing ribs form plugging holes into which the first protrusions extend.

[0009] In a second aspect, the present disclosure provides a lower box body, comprising the above-mentioned crossbeam assembly, wherein the lower box body further comprises a box body frame, and the fixed beam is installed on the inner side of the box body frame.

[0010] The lower box body further comprises a side transfer block, and at least two side transfer blocks are arranged on the inner side of the box body frame;

[0011] The side adapter block is provided with a third inclined surface which is parallel to or coplanar with the first inclined surface, and the movable beam is provided with a fourth inclined surface which can slide along the third inclined surface.

[0012] The lower box body also includes a second fastener. The movable beam is provided with a second strip hole extending along the moving direction of the movable beam relative to the fixed beam. The second fastener passes through the second strip hole and is detachably connected to the side adapter block.

[0013] The lower box body further comprises a liquid cooling plate and a first fastening assembly, and the box body frame and the liquid cooling plate are arranged to form a cavity capable of accommodating a battery cell group;

[0014] The fixed beam and the liquid cooling plate are both provided with first penetration holes, and at least one of the first penetration holes is a strip hole extending along the moving direction of the movable beam relative to the fixed beam. The first fastening component is penetrated through the two first penetration holes to achieve relative fixation of the fixed beam and the liquid cooling plate.

[0015] The lower box body further comprises a beam adapter block and a second fastening assembly, at least two beam adapter blocks are arranged on the inner side of the box body frame, and the fixed beam is connected between the two beam adapter blocks;

[0016] The crossbeam adapter block and one end of the corresponding fixed beam are both provided with a second through hole, and at least one of the second through holes is a strip hole extending along the moving direction of the movable beam relative to the fixed beam, and the second fastening component is passed through the two second through holes to achieve relative fixation of the fixed beam and the crossbeam adapter block.

[0017] In a third aspect, the present disclosure provides a box body, comprising the above-mentioned lower box body.

[0018] In a fourth aspect, the present disclosure provides a battery pack, comprising the above-mentioned box body.

[0019] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0020] The crossbeam assembly is provided with a fixed beam and a movable beam. The fixed beam and the movable beam can achieve relative sliding through the first inclined surface and the second inclined surface, and are fixed by the first fastener, so that the distance between the movable beam and the fixed beam can be adjusted, so that the fixed beam and the movable beam cooperate with the box frame of the lower box body to achieve tight contact with the battery cell group. Compared with the existing technology, the assembly tolerance can be absorbed, so that the battery cell is in hard contact with the box frame and the crossbeam assembly, and the situation that the outermost battery cell of the battery cell group is avoided from being skewed and tearing the pole ear bus bar occurs, thereby ensuring the reliability of the structure and improving the consistency of the expansion and deformation of each battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 The structure of the beam assembly described in the first embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0024] Figure 2 The structure of the beam assembly described in the first embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0025] Figure 3 A schematic structural diagram of a fixed beam from a first perspective provided in Embodiment 1 of the present disclosure;

[0026] Figure 4 A schematic structural diagram of a fixed beam from a second perspective provided in the first embodiment of the present disclosure;

[0027] Figure 5 A schematic diagram of the structure of a movable beam provided in the first embodiment of the present disclosure;

[0028] Figure 6 This is a structural schematic diagram of the lower box body according to the first embodiment of the present disclosure;

[0029] Figure 7 This is a schematic diagram of the connection structure between the fixed beam and the liquid cooling plate according to the first embodiment of the present disclosure;

[0030] Figure 8 A schematic diagram of the structure of a beam adapter block provided in Embodiment 1 of the present disclosure;

[0031] Fig. 9A schematic diagram of the connection structure between the beam adapter block and the fixed beam provided in the first embodiment of the present disclosure;

[0032] Fig.10 A schematic diagram of the structure of the lower box provided in the second embodiment of the present disclosure;

[0033] Fig.11 A schematic diagram of the connection structure between the side adapter block and the movable beam provided in the second embodiment of the present disclosure.

[0034] Among them, 1. beam assembly; 11. fixed beam; 111. first plate; 1111. first fitting surface; 112. reinforcing rib; 1121. first inclined surface; 113. mounting tube; 114. connecting part; 12. movable beam; 121. second plate; 1211. second fitting surface; 122. first protrusion; 1221. second inclined surface; 123. second protrusion; 1231. first strip hole; 13. first fastener; 14. first rivet nut;

[0035] 2. Box frame;

[0036] 3. Liquid cooling plate;

[0037] 4. Beam transfer block; 41. Bottom plate; 42. Mounting plate; 43. Reinforcement plate;

[0038] 5. first fastening assembly; 51. raised stud; 52. nut;

[0039] 6. second fastening assembly; 61. bolt; 62. second rivet nut;

[0040] 7. Side adapter block; 71. Third inclined surface;

[0041] 8. Second fastener;

[0042] 10. Cavity;

[0043] 20. Battery cells;

[0044] 101, a first drilling hole; 102, a second drilling hole. DETAILED DESCRIPTION

[0045] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0047] Embodiment 1

[0048] like Figures 1 to 9 As shown, the embodiment of the present disclosure provides a beam assembly 1, which is suitable for the lower box of the battery pack, and the beam assembly 1 includes a fixed beam 11, a movable beam 12 and a first fastener 13. Among them, the fixed beam 11 is provided with a first inclined surface 1121, the movable beam 12 is provided with a second inclined surface 1221 that can slide along the first inclined surface 1121, and the movable beam 12 is provided with a first strip hole 1231 extending along the moving direction of the movable beam 12 relative to the fixed beam 11. The first fastener 13 passes through the first strip hole 1231 and is detachably connected to the fixed beam 11, so as to achieve relative fixation of the fixed beam 11 and the movable beam 12.

[0049] It can be understood that the crossbeam assembly 1, by setting a fixed beam 11 and a movable beam 12, can achieve relative sliding between the fixed beam 11 and the movable beam 12 through the first inclined surface 1121 and the second inclined surface 1221, and is fixed by the first fastener 13, so that the distance between the movable beam 12 and the fixed beam 11 can be adjusted, so that the fixed beam 11 and the movable beam 12 can cooperate with the box frame 2 of the lower box body to achieve tight contact with the battery cell group. Compared with the prior art, the assembly tolerance can be absorbed, so that the battery cell 20 is in hard contact with the box frame 2 and the crossbeam assembly 1, avoiding the outermost battery cell 20 of the battery cell group from being skewed and tearing the pole ear bus, thereby ensuring the reliability of the structure and improving the consistency of the expansion and deformation of each battery cell 20.

[0050] It should be noted that the battery cell group includes a plurality of battery cells 20 , and the plurality of battery cells 20 are arranged side by side to form the battery cell group.

[0051] like Figure 2 As shown, the crossbeam assembly 1 also includes a first rivet nut 14 disposed on the fixed beam 11, and the first fastener 13 can be connected to the first rivet nut 14. The first fastener 13 is preferably a bolt. When the first fastener 13 and the first rivet nut 14 are tightened, the second inclined surface 1221 presses against the first inclined surface 1121, and the fixed beam 11 and the movable beam 12 are relatively fixed; when the first fastener 13 and the first rivet nut 14 are loosened, the second inclined surface 1221 can slide relative to the first inclined surface 1121, because the movable beam 12 is provided with a first strip hole 1231, and after the movable beam 12 moves, the fixed beam 11 and the movable beam 12 can still be relatively fixed by the first fastener 13 and the first rivet nut 14.

[0052] like Figures 3 to 5As shown, a first bonding surface 1111 capable of bonding with the battery cell 20 is provided on the side of the fixed beam 11 away from the movable beam 12, and a second bonding surface 1211 capable of bonding with the battery cell 20 is provided on the side of the movable beam 12 away from the fixed beam 11. By providing the first bonding surface 1111 and the second bonding surface 1211, the bonding degree between the fixed beam 11 and the movable beam 12 and the battery cell 20 can be improved, thereby further improving the tightness of the battery cell 20.

[0053] Furthermore, the fixed beam 11 is provided with a plurality of reinforcing ribs 112, the reinforcing ribs 112 having the above-mentioned first inclined surface 1121; the movable beam 12 is provided with a plurality of first protrusions 122, the first protrusions 122 having the above-mentioned second inclined surface 1221, and the reinforcing ribs 112 form plug-in holes for the first protrusions 122 to extend into. Such an arrangement can improve the stability of the movable beam 12 when it moves relative to the fixed beam 11, and prevent the movable beam 12 from being misaligned relative to the fixed beam 11.

[0054] Specifically, refer to Figure 3 and Figure 4 The fixed beam 11 includes a first plate 111 and the reinforcing rib 112. The first plate 111 and the reinforcing rib 112 are connected. The reinforcing rib 112 is a grid-shaped reinforcing rib. The first plate 111 has the first fitting surface 1111. The first rivet nut 14 is installed on the reinforcing rib 112.

[0055] Reference Figure 5 The movable beam 12 includes a second plate 121, and the second plate 121 is provided with a first protrusion 122 and a second protrusion 123. The second plate 121 has the second fitting surface 1211. The first protrusion 122 has the second inclined surface 1221. The second protrusion 123 is provided with the first strip hole 1231.

[0056] It should be noted that there are multiple second protrusions 123, multiple corresponding first strip holes 1231, and multiple corresponding first fasteners 13 and first rivet nuts 14, which can improve the stability of the fixed beam 11 and the movable beam 12 when they are relatively fixed.

[0057] like Figure 6 As shown, the embodiment of the present disclosure further provides a lower box body, which includes a box body frame 2 , and the above-mentioned fixing beam 11 is installed on the inner side of the box body frame 2 .

[0058] Furthermore, the lower box body further comprises a liquid cooling plate 3 and a first fastening assembly 5, and the box body frame 2 and the liquid cooling plate 3 are arranged to form a cavity 10 capable of accommodating the battery cell group.

[0059] The fixed beam 11 and the liquid cooling plate 3 are both provided with first penetration holes 101, and at least one first penetration hole 101 is a strip hole extending along the moving direction of the movable beam 12 relative to the fixed beam 11. The first fastening component 5 is penetrated through the two first penetration holes 101 to achieve relative fixation of the fixed beam 11 and the liquid cooling plate 3.

[0060] It can be understood that by setting the first penetration hole 101 on the fixed beam 11 and / or the liquid cooling plate 3 as a strip hole, the installation position of the fixed beam 11 can be adjusted, so that the fixed beam 11 can cooperate with the box frame 2 of the lower box body to achieve the tightening of the battery cell group, and then the other group of battery cells can be tightened by the movable beam 12, that is, both sides of the beam assembly 1 can tighten the battery cell group.

[0061] It should be noted that the lower box body may include one or more crossbeam assemblies 1. When there is one crossbeam assembly 1, both the fixed beam 11 and the movable beam 12 cooperate with the box body frame 2 to achieve tight contact with the battery cell group. When there are multiple crossbeam assemblies 1, two adjacent crossbeam assemblies 1 can also cooperate with the fixed beam 11 and the movable beam 12 to tightly contact with the battery cell group.

[0062] Furthermore, the fixed beam 11 and the liquid cooling plate 3 are both provided with a plurality of first penetration holes 101 which correspond to each other, and at least one of the two corresponding first penetration holes 101 is a strip-shaped hole. With such a configuration, the liquid cooling plate 3 and the fixed beam 11 can be fixed by means of a plurality of first fastening components 5, thereby improving the connection stability between the fixed beam 11 and the liquid cooling plate 3, and enabling the fixed beam 11 to maintain a tight state against the battery cell group, thereby improving the assembly stability of the battery cell group.

[0063] like Figure 7 As shown, the first fastening assembly 5 comprises a protruding stud 51 and a nut 52. The protruding stud 51 is penetrated through the two first penetration holes 101, and the nut 52 is threadedly connected to the protruding stud 51. By adopting the protruding stud 51 and the nut 52, the installation and disassembly of the liquid cooling plate 3 and the fixed beam 11 are facilitated.

[0064] Furthermore, the first through hole 101 on the liquid cooling plate 3 is a countersunk hole, and the head of the protruding stud 51 is located in the countersunk hole after installation. By setting the first through hole 101 on the liquid cooling plate 3 as a countersunk hole, the head of the protruding stud 51 can be hidden, so as to prevent the head of the protruding stud 51 from protruding and affecting the layout of the lower box.

[0065] Reference Figure 7 , illustratively, the first perforated hole 101 on the above-mentioned fixed beam 11 is a strip hole, and the first perforated hole 101 on the liquid cooling plate 3 is a circular hole, and is a countersunk hole. Optionally, the first perforated hole 101 on the liquid cooling plate 3 can also be set as a strip hole, or the first perforated holes 101 on the fixed beam 11 and the liquid cooling plate 3 are both strip holes.

[0066] Refer again Figure 3 The fixing beam 11 further includes a mounting tube 113, which penetrates the reinforcing rib 112, and the inner cavity of the mounting tube 113 forms the first through hole 101. By providing the mounting tube 113, the mounting tube 113 provides a space for installing the first fastening assembly 5, and the nut 52 can be arranged in the inner cavity of the mounting tube 113. The protruding stud 51 extends into the mounting tube 113 to connect with the nut 52, which can avoid other structures and facilitate the installation of the protruding stud 51 and the nut 52.

[0067] like Figure 6 , Figure 8 and Fig. 9 As shown, the lower box body also includes a beam adapter block 4, at least two beam adapter blocks 4 are arranged on the inner side of the box body frame 2, and the fixed beam 11 is connected between the two beam adapter blocks 4. The beam adapter block 4 and one end of the corresponding fixed beam 11 are both provided with a second penetration hole 102, and at least one second penetration hole 102 is a strip hole extending along the moving direction of the movable beam 12 relative to the fixed beam 11, and the second fastener 8 is penetrated through the two second penetration holes 102 to achieve relative fixation of the fixed beam 11 and the beam adapter block 4.

[0068] Furthermore, the beam adapter block 4 and the corresponding fixed beam 11 are both provided with a plurality of second through holes 102 at one end, and the two corresponding second through holes 102 are at least one bar-shaped hole. With such a configuration, the beam adapter block 4 and the fixed beam 11 can be fixed by the plurality of second fastening components 6, thereby improving the connection stability between the beam adapter block 4 and the fixed beam 11, and allowing the fixed beam 11 to stably maintain a tight state against the battery cell group, thereby improving the assembly stability of the battery cell group.

[0069] For example, Figure 8 and Fig. 9 As shown, the beam adapter block 4 has two second through holes 102, and correspondingly, the fixed beam 11 has two second through holes 102 at one end corresponding to the beam adapter block 4. Optionally, the number of the second through holes 102 on the beam adapter block 4 and the fixed beam 11 can also be set according to actual needs.

[0070] like Fig. 9 As shown, the second fastening assembly 6 includes a bolt 61 and a second rivet nut 62 , and the second rivet nut 62 is arranged on the crossbeam adapter block 4 .

[0071] Furthermore, if Figure 8 and Fig. 9As shown, the beam adapter block 4 includes a bottom plate 41 and a mounting plate 42, the mounting plate 42 is connected to the bottom plate 41, a second through hole 102 is opened on the mounting plate 42, the fixed beam 11 is mounted on the mounting plate 42, and the second rivet nut 62 is located on the side of the mounting plate 42 away from the fixed beam 11. In this way, the bolt 61 passes through the two second through holes 102 and cooperates with the second rivet nut 62, which is easy to operate and facilitates the connection between the fixed beam 11 and the beam adapter block 4.

[0072] It should be noted that the bottom plate 41 can be connected to the box frame 2 by bolts, welding, etc., which is not specifically limited here.

[0073] Furthermore, the cross beam adapter block 4 further includes a reinforcing rib plate 43, which is connected to the mounting plate 42 and the bottom plate 41, and at least two reinforcing rib plates 43 are provided, wherein a space for limiting the fixed beam 11 is formed between two adjacent reinforcing rib plates 43. By providing the reinforcing rib plates 43, not only the structural strength of the cross beam adapter block 4 can be improved, but also the fixed beam 11 can be limited by the reinforcing rib plates 43, which is convenient for assembling the fixed beam 11 and is conducive to improving the connection stability between the fixed beam 11 and the cross beam adapter block 4.

[0074] It should be noted that the bottom plate 41, the mounting plate 42 and the reinforcing rib plate 43 constituting the cross beam adapter block 4 are integrally formed, preferably cast. The cross beam adapter block 4 is preferably made of aluminum, which has good thermal conductivity, high strength, and can also enhance the heat dissipation effect of the battery pack.

[0075] Refer to this again Figure 3 The fixed beam 11 further includes a connecting portion 114 connected to the first plate 111 and the reinforcing rib 112, and the connecting portion 114 is provided with the second through hole 102. The connecting portion 114 is provided with two connecting portions, and the two connecting portions 114 are respectively connected to the two beam adapter blocks 4.

[0076] It should be noted that the first plate body 111, the reinforcing rib 112, the mounting tube 113 and the connecting portion 114 constituting the fixing beam 11 are integrally formed, preferably by casting. The fixing beam 11 is preferably made of aluminum, which has good thermal conductivity and high strength, and can improve the heat dissipation effect of the battery cell group. Optionally, the first plate body 111, the reinforcing rib 112, the mounting tube 113 and the connecting portion 114 can also be separately provided.

[0077] Based on the same inventive concept, the embodiment of the present disclosure further provides a box body, including the above-mentioned lower box body. The box body has the corresponding technical effects of the lower box body of the above-mentioned embodiment, which will not be repeated here.

[0078] Based on the same inventive concept, the embodiment of the present disclosure further provides a battery pack, including the above-mentioned box body. The battery pack has the corresponding technical effects of the above-mentioned box body, which will not be described in detail here.

[0079] Embodiment 2

[0080] The embodiment of the present disclosure provides a crossbeam assembly 1, which is suitable for the lower box of a battery pack, and the crossbeam assembly 1 includes a fixed beam 11, a movable beam 12 and a first fastener 13. The fixed beam 11 is provided with a first inclined surface, the movable beam 12 is provided with a second inclined surface that can slide along the first inclined surface, the movable beam 12 is provided with a first strip hole extending along the moving direction of the movable beam 12 relative to the fixed beam 11, and the first fastener 13 passes through the first strip hole and is detachably connected to the fixed beam 11, so as to achieve relative fixation of the fixed beam 11 and the movable beam 12.

[0081] The structure of the fixed beam 11 is the same as or different from that of the fixed beam in the first embodiment. The structure of the movable beam 12 is the same as or different from that of the movable beam 12 in the first embodiment.

[0082] like Fig.10 and Fig.11 As shown, the disclosed embodiment provides a lower box body, which includes a box frame 2, and the fixed beam 11 is installed on the inner side of the box frame 2. The fixed beam 11 is connected to the box frame 2 of the lower box body, and is located on the inner side of the box frame 2. Different from the first embodiment, the position of the fixed beam 11 is not adjustable after being fixed, that is, the crossbeam assembly 1 can only adjust the position of the movable beam 12 relative to the fixed beam 11, and the fixed beam 11 remains in the same position after installation. In this case, the movable beam 12 can cooperate with the box frame 2 to press against the battery cell group, and the movable beam 12 can also cooperate with the fixed beam 11 of another crossbeam assembly 1 to press against the battery cell group.

[0083] Furthermore, the lower box body further comprises a side adapter block 7, and at least two side adapter blocks 7 are arranged inside the box body frame 2. The side adapter block 7 is provided with a third inclined surface 71 parallel to or coplanar with the first inclined surface 1121, and the movable beam 12 is provided with a fourth inclined surface capable of sliding along the third inclined surface 71.

[0084] It is understandable that by providing the third inclined surface 71 on the side adapter block 7 and the fourth inclined surface on the movable beam 12, when the movable beam 12 is moved, it is convenient for the movable beam 12 to move relative to the side adapter block 7. The side adapter block 7 can be connected to the box frame by welding, screwing, etc., and no specific limitation is made here.

[0085] Furthermore, the lower box body also includes a second fastener 8. The movable beam 12 is provided with a second strip hole extending along the moving direction of the movable beam 12 relative to the fixed beam 11. The second fastener 8 passes through the second strip hole and is detachably connected to the side adapter block 7.

[0086] By providing the second strip hole, it is convenient to move the movable beam 12 relative to the side adapter block 7 , and after the movable beam 12 is moved, it can still be fixed by the second fastener 8 .

[0087] Furthermore, the second fastener 8 is preferably a bolt, and a rivet nut is correspondingly provided on the side adapter block 7. The bolt and the rivet nut cooperate to achieve relative fixation of the movable beam 12 and the side adapter block 7.

[0088] It is understandable that the above-mentioned fixed beam 11 and side adapter block 7 can be set separately to achieve the adjustment of the position of the movable beam 12. Therefore, only the fixed beam 11 can be set on the lower box body, or only the side adapter block 7 can be set, or both the fixed beam 11 and the side adapter block 7 can be set.

[0089] Based on the same inventive concept, the embodiment of the present disclosure further provides a box body, including the above-mentioned lower box body. The box body has the corresponding technical effects of the lower box body of the above-mentioned embodiment, which will not be repeated here.

[0090] Based on the same inventive concept, the embodiment of the present disclosure further provides a battery pack, including the above-mentioned box body. The battery pack has the corresponding technical effects of the above-mentioned box body, which will not be described in detail here.

[0091] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0092] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A crossbeam assembly, suitable for the lower box of a battery pack, characterized in that: The invention comprises a fixed beam, a movable beam and a first fastener, wherein the fixed beam is provided with a first inclined surface, the movable beam is provided with a second inclined surface capable of sliding along the first inclined surface, the movable beam is provided with a first strip hole extending along the moving direction of the movable beam relative to the fixed beam, and the first fastener is detachably connected to the fixed beam through the first strip hole.

2. The crossbeam assembly according to claim 1, characterized in that: A first fitting surface capable of fitting with the battery cell is arranged on a side of the fixed beam away from the movable beam; a second fitting surface capable of fitting with the battery cell is arranged on a side of the movable beam away from the fixed beam.

3. The crossbeam assembly according to claim 1, characterized in that: The fixed beam is provided with a plurality of reinforcing ribs, each of which has the first inclined surface; the movable beam has a plurality of first protrusions, each of which has the second inclined surface; and the reinforcing ribs form plugging holes into which the first protrusions extend.

4. A lower box, characterized in that: It comprises the crossbeam assembly as described in any one of claims 1 to 3, wherein the lower box body further comprises a box body frame, and the fixed beam is installed on the inner side of the box body frame.

5. The lower box according to claim 4, characterized in that: The lower box body further comprises a side transfer block, and at least two side transfer blocks are arranged on the inner side of the box body frame; The side adapter block is provided with a third inclined surface which is parallel to or coplanar with the first inclined surface, and the movable beam is provided with a fourth inclined surface which can slide along the third inclined surface.

6. The lower box according to claim 5, characterized in that: The lower box body also includes a second fastener. The movable beam is provided with a second strip hole extending along the moving direction of the movable beam relative to the fixed beam. The second fastener passes through the second strip hole and is detachably connected to the side adapter block.

7. The lower box according to claim 4, characterized in that: The lower box body further comprises a liquid cooling plate and a first fastening assembly, and the box body frame and the liquid cooling plate are arranged to form a cavity capable of accommodating a battery cell group; The fixed beam and the liquid cooling plate are both provided with first penetration holes, and at least one of the first penetration holes is a strip hole extending along the moving direction of the movable beam relative to the fixed beam. The first fastening component is penetrated through the two first penetration holes to achieve relative fixation of the fixed beam and the liquid cooling plate.

8. The lower box according to claim 7, characterized in that: The lower box body further comprises a beam adapter block and a second fastening assembly, at least two beam adapter blocks are arranged on the inner side of the box body frame, and the fixed beam is connected between the two beam adapter blocks; The crossbeam adapter block and one end of the corresponding fixed beam are both provided with a second through hole, and at least one of the second through holes is a strip hole extending along the moving direction of the movable beam relative to the fixed beam, and the second fastening component is passed through the two second through holes to achieve relative fixation of the fixed beam and the crossbeam adapter block.

9. A box, characterized in that: Comprising a lower box body as described in any one of claims 5-8.

10. A battery pack, characterized in that: Comprising the box body as claimed in claim 9.

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