Battery tray, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery tray, a battery pack and electric equipment. The battery tray comprises a first shell which comprises a first bottom plate and a first surrounding plate connected to the peripheral edge of the first bottom plate; the second shell comprises a second bottom plate and a second surrounding plate connected to the peripheral edge of the second bottom plate, a first containing cavity is defined by the second bottom plate and the second surrounding plate, and the first shell is arranged in the containing cavity; the supporting layer comprises a first supporting part, and the first supporting part is clamped between the first surrounding plate and the second surrounding plate. By applying the technical scheme of the invention, the problem of low structural strength of the battery pack in the related technology can be effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery tray, a battery pack, and an electrical device. Background Art

[0002] The battery tray is an important structure in the battery pack. The battery tray can provide physical support for the battery module to ensure the stability and safety of the battery module during vehicle operation. Therefore, the design of the battery tray needs to disperse the impact force when the battery module is impacted by an external force and reduce the risk of battery damage.

[0003] In the related art, in order to improve the structural strength of the battery tray, the battery tray is generally designed as a multi-layer structure. However, the current battery tray has low structural strength, which affects its service life. Summary of the Utility Model

[0004] This application provides a battery tray, a battery pack, and an electrical device to solve the problems of large mass and low energy density of the battery pack in the related art.

[0005] On the one hand, this application provides a battery tray, including:

[0006] A first housing, including a first bottom plate and a first surrounding plate connected to the peripheral edge of the first bottom plate;

[0007] A second housing, the second housing including a second bottom plate and a second surrounding plate connected to the peripheral edge of the second bottom plate. The second bottom plate and the second surrounding plate enclose a first accommodation cavity, and the first housing is disposed in the accommodation cavity;

[0008] A support layer, including a first support portion, and the first support portion is clamped between the first surrounding plate and the second surrounding plate.

[0009] In some embodiments, the orthographic projection of the first support portion on the projection plane is offset from the first bottom plate, and the projection plane is perpendicular to the thickness direction of the first bottom plate.

[0010] In some embodiments, the first surrounding plate includes a first side frame and a first flange plate. One end of the first side frame is connected to the peripheral edge of the first bottom plate and is disposed at an angle to the first bottom plate. The first flange plate is connected to the peripheral edge of the other end of the first side frame and extends in a direction away from the accommodation cavity;

[0011] The second surrounding plate includes a second side frame and a second flange plate. One end of the second side frame is connected to the peripheral edge of the second bottom plate and is disposed at an angle to the second bottom plate. The second flange plate is connected to the peripheral edge of the second side frame and extends in a direction away from the accommodation cavity, and the first support portion is clamped between the first flange plate and the second flange plate.

[0012] In some embodiments, the first support portion includes a third flange plate, and the third flange plate is clamped between the first flange plate and the second flange plate.

[0013] In some embodiments, the first support portion further includes a third side frame connected to the inner edge of the third flange plate. The third side frame is disposed at an angle to the third flange plate, and the third side frame is clamped between the first side frame and the second side frame.

[0014] In some embodiments, the support layer further includes a second support portion. The second support portion is connected to the circumferential inner edge of the first support portion and is disposed at an angle to the first support portion, and the second support portion is clamped between the first bottom plate and the second bottom plate.

[0015] In some embodiments, the orthographic projection of the second support portion on the projection plane covers a part of the first bottom plate, and the projection plane is perpendicular to the thickness direction of the first bottom plate.

[0016] In some embodiments, the area S1 of the orthographic projection of the second support portion covering the first bottom plate and the area S2 of the first bottom plate satisfy:

[0017] 0.1 ≤ S1:S2 ≤ 0.5.

[0018] In some embodiments, the support layer includes a plurality of first convex portions and a plurality of second convex portions. Each first convex portion abuts against the first housing, and each second convex portion abuts against the second housing. The plurality of first convex portions and the plurality of second convex portions are alternately arranged in the circumferential direction of the support layer.

[0019] In some embodiments, the support layer is adhesively connected to the first housing and / or the second housing.

[0020] In some embodiments, the battery tray includes a first adhesive layer. The first adhesive layer includes a plurality of first adhesive portions, and the first adhesive portions are disposed between the surface of the second convex portion facing away from the second housing and the first housing;

[0021] and / or,

[0022] The battery tray includes a second adhesive layer. The second adhesive layer includes a plurality of second adhesive portions, and the second adhesive portions are disposed between the surface of the first convex portion facing away from the first housing and the second housing.

[0023] In some embodiments, the first support portion includes a third side frame and a third flange plate. The third side frame is disposed on the circumferential outer side of the second support portion and is disposed at an angle to the second support portion. The third flange plate is disposed on the circumferential outer side of the third side frame. The third side frame is clamped between the first enclosing plate and the second enclosing plate, and the third flange plate is clamped between the first flange edge and the second flange edge.

[0024] In some embodiments, the first flange plate includes a first flange edge and a first lug, and the first mounting hole is disposed on the first lug;

[0025] The second flange plate comprises a second flange edge and a second lug, and the second mounting hole is arranged on the second lug;

[0026] The battery tray also includes a fastener, which is inserted into the first mounting hole and the second mounting hole.

[0027] In some embodiments, the first lug and the second lug are both protruding from the third flange plate;

[0028] The thickness of the first lug is greater than the thickness of the first flange edge, and the first lug abuts against the second lug;

[0029] or,

[0030] The thickness of the second lug is greater than the thickness of the second flange edge, and the second lug abuts against the first lug.

[0031] In some embodiments, the second bottom plate includes a third boss protruding toward the first bottom plate, the third boss abuts against the first bottom plate, and the support layer is located on the circumferential outer side of the third boss.

[0032] In some embodiments, the battery tray also includes at least two limiting beams. The first bottom plate and the first enclosure plate together form a second accommodating cavity. At least two limiting beams are arranged in the second accommodating cavity and are arranged at intervals. The battery is arranged between the at least two limiting beams.

[0033] In some embodiments, a first mounting hole is provided on the first flange plate, a second mounting hole is provided on the second flange plate, and a third mounting hole is provided on the third flange plate. The battery tray also includes a fastener, which is sequentially passed through the first mounting hole, the third mounting hole and the second mounting hole to clamp the supporting layer between the first shell and the second shell.

[0034] In some embodiments, the fastener includes a first fastening part and a second fastening part, the first fastening part is provided with a threaded hole, the second fastening part is provided with a threaded column, the threaded column passes through the first mounting hole and the second mounting hole and is connected to the threaded hole, and the first flange plate and the second flange plate are clamped between the first fastening part and the second fastening part.

[0035] In some embodiments, the first fastening portion includes a fixing column, and a threaded hole is arranged in the fixing column; the second fastening portion includes a first fastening ring and a threaded column connected to the first fastening ring, the fixing column is located on the side of the first flange plate facing away from the second flange plate, and the first fastening ring is located on the side of the second flange plate facing away from the first flange plate; the threaded column passes through the first mounting hole and the second mounting hole and is connected to the threaded hole, and the first flange plate and the second flange plate are clamped between the fixing column and the first fastening ring.

[0036] In some embodiments, the second fastening portion includes a first fastening ring and a threaded post connected to the first fastening ring; the first fastening portion includes a second fastening ring and a threaded sleeve connected to the second fastening ring. A threaded hole is provided in the threaded sleeve. The threaded post passes through the first mounting hole and the second mounting hole and is connected to the threaded hole. The first flange plate and the second flange plate are clamped between the first fastening ring and the second fastening ring.

[0037] In some embodiments, a through hole is further provided on the battery tray. The through hole penetrates through the first enclosing plate, the first supporting portion, and the second enclosing plate in sequence. The battery tray further includes a protective fastener passing through the through hole. The first enclosing plate, the first supporting portion, and the second enclosing plate are clamped between the protective fasteners.

[0038] In some embodiments, the protective fastener includes a first connecting member and a second connecting member. The first connecting member includes a first crimping ring and a first connecting portion provided on the inner edge of the first crimping ring. The second connecting member includes a second crimping ring and a second connecting portion provided on the inner edge of the second crimping ring. The first connecting member and the second connecting member respectively penetrate into the through hole from both sides of the through hole. The first connecting portion and the second connecting portion are fixedly connected to clamp the first enclosing plate, the first supporting portion, and the second enclosing plate between the first crimping ring and the second crimping ring.

[0039] On the other hand, the present application provides a battery pack including the above-mentioned battery tray.

[0040] On the other hand, the present application provides an electrical device including an electrical device and a battery pack. The battery pack is used to provide electrical energy for the electrical device.

[0041] The battery tray provided by the present application includes a first housing, a second housing, and a support layer. The first housing can be used to place a battery module. The support layer can be located outside the first housing. The second housing can be located outside the support layer. By connecting the first housing and the second housing, the support layer is tightly clamped between the first housing and the second housing, thereby playing a role in ensuring the structural strength of the tray and further extending the service life of the battery tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0043] Figure 1 is an exploded structural schematic diagram of the battery tray provided by an embodiment of the present application;

[0044] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of the first housing of the battery tray of

[0045] Figure 3 isFigure 1 Schematic perspective view of the second housing of the battery tray;

[0046] Figure 4 is Figure 1 Schematic perspective view of the support layer of the battery tray;

[0047] Figure 5 is Figure 1 Schematic view of the structure of the first adhesive layer and the second adhesive layer of the battery tray;

[0048] Figure 6 is Figure 1 Partial structural cross-sectional view of the battery tray;

[0049] Figure 7 is Figure 1 Schematic perspective view of the fastener of the battery tray;

[0050] Figure 8 Exploded structural view of the battery tray provided by another embodiment of the present application;

[0051] Figure 9 is Figure 8 Schematic perspective view of the support layer of the battery tray;

[0052] Figure 10 Exploded structural view of the battery tray provided by another embodiment of the present application;

[0053] Figure 11 is Figure 10 Schematic perspective view of the support layer of the battery tray.

[0054] Explanation of reference numerals:

[0055] 10. Battery tray;

[0056] 100. First housing; 101. Second accommodation cavity; 110. First bottom plate; 120. First enclosing plate; 121. First side frame; 122. First flange plate; 1221. First flange edge; 1222. First lug; 123. First mounting hole;

[0057] 200. Second housing; 201. First accommodation cavity; 210. Second bottom plate; 211. Third boss; 220. Second enclosing plate; 221. Second side frame; 222. Second flange plate; 2221. Second flange edge; 2222. Second lug; 223. Second mounting hole;

[0058] 300. Support layer; 310. Second support portion; 320. First support portion; 321. Third side frame; 323. Third flange plate; 324. Third mounting hole;

[0059] 331. First convex part; 332. Second convex part;

[0060] 340. Weight reduction hole;

[0061] 400. Fastener; 410. First fastening part; 411. Fixed column; 420. Second fastening part; 421. First fastening ring; 422. Threaded column;

[0062] 500. Limit beam;

[0063] 610. First adhesive layer; 620. Second adhesive layer;

[0064] 700. Protective fastener; 710. First connecting part; 711. First crimping ring; 712. First connecting portion; 720. Second connecting part;

[0065] 800. Through hole. Detailed implementation manners

[0066] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0067] As described in the background art, the design of the battery tray needs to disperse the impact force when the battery module is impacted by an external force and reduce the risk of battery damage. In the related art, in order to improve the structural strength of the battery tray, the battery tray is generally designed as a multi-layer structure. However, the current battery tray structure is heavy and occupies a large space, reducing the energy density of the battery pack.

[0068] To address the above technical problems, the embodiments of the present application provide a battery tray, a battery pack, and an electrical device. By improving the support structure in the middle of the battery tray, the support structure can play a strengthening role, thereby extending the service life of the battery tray.

[0069] To make the above objectives, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0070] Please refer to Figure 1 、Figure 8 and Figure 11 As shown in Figure 11 , the battery tray 10 includes: a first housing 100, a second housing 200, and a support layer 300.

[0071] Specifically, the first housing 100 includes a first bottom plate 110 and a first surrounding plate 120 connected to the peripheral edge of the first bottom plate 110; the second housing 200 includes a second bottom plate 210 and a second surrounding plate 220 connected to the peripheral edge of the second bottom plate 210. The second bottom plate 210 and the second surrounding plate 220 enclose a first accommodation cavity 201, and the first housing 100 is disposed in the first accommodation cavity 201; the support layer 300 includes a first support portion 320, and the first support portion 320 is clamped between the first surrounding plate 120 and the second surrounding plate 220.

[0072] Applying the above technical solution, the first housing 100 can be used to place the battery module. The support layer 300 can be located outside the first housing 100, and the second housing 200 can be located outside the support layer 300. The first accommodation cavity 201 can accommodate the first housing 100. A support layer 300 is clamped between the second housing 200 and the first housing 100. Through the connection of the first housing 100 and the second housing 200, the support layer 300 is tightly clamped between the first housing 100 and the second housing 200. Specifically, the support layer 300 includes a first support portion 320, and the first support portion 320 can be clamped between the first surrounding plate 120 and the second surrounding plate 220, so that the support layer 300 can be stably connected to the first housing 100 and the second housing 200, playing a role in ensuring the structural strength of the tray, and further extending the service life of the battery pack.

[0073] Furthermore, as Figure 10 and Figure 11 shown, in some embodiments, the orthographic projection of the first support portion 320 on the projection plane is offset from the first bottom plate 110, and the projection plane is perpendicular to the thickness direction of the first bottom plate 110.

[0074] Due to this setting method, no support layer 300 is provided between the first bottom plate 110 and the second bottom plate 210, thereby further reducing the weight of the support layer 300. The setting method of the support layer 300 can reduce the weight of the support layer 300 on the premise of ensuring the structural strength of the battery tray, so that the support structure can not only play a strengthening role, but also maintain a lower weight, thereby reducing the weight of the entire battery pack, increasing the energy density of the battery pack, and realizing the lightweight of the electrical equipment.

[0075] Furthermore, as Figures 8 to 11As shown, the first enclosing plate 120 includes a first side frame 121 and a first flange plate 122. One end of the first side frame 121 is connected to the peripheral edge of the first bottom plate 110 and is arranged at an angle with the first bottom plate 110. The first flange plate 122 is connected to the peripheral edge of the other end of the first side frame 121 and extends in a direction away from the accommodation cavity.

[0076] The second enclosing plate 220 includes a second side frame 221 and a second flange plate 222. One end of the second side frame 221 is connected to the peripheral edge of the second bottom plate 210 and is arranged at an angle with the second bottom plate 210. The second flange plate 222 is connected to the peripheral edge of the second side frame 221 and extends in a direction away from the accommodation cavity. The first support portion 320 is clamped between the first flange plate 122 and the second flange plate 222, so as to enhance the fastening stability of the first support portion 320 through the structure of the flange plates, and ensure that the support layer 300 can be stably connected between the first housing 100 and the second housing 200.

[0077] Exemplarily, as Figure 10 and Figure 11 shown, in some embodiments, the first support portion 320 may include a third flange plate 323, and the third flange plate 323 is clamped between the first flange plate 122 and the second flange plate 222. The support layer 300, the first housing 100, and the second housing 200 are all connected through the flange plate structure, thus ensuring the fastening stability of the three.

[0078] Further, in some embodiments, the first support portion 320 further includes a third side frame 321 connected to the inner edge of the third flange plate 323. The third side frame 321 is arranged at an angle with the third flange plate 323, and the third side frame 321 is clamped between the first side frame 121 and the second side frame 221.

[0079] In view of the setting of the third side frame 321, the contact area between the support layer 300 and the first housing 100 and the second housing 200 is increased, so that the support layer 300 can better play a supporting role. At the same time, the third side frame 321 can also improve the overall strength of the battery tray, increase the anti-damage ability of the side part of the battery tray, and further improve the service life of the battery tray.

[0080] As Figures 1 to 9 shown, in some embodiments, the support layer 300 further includes a second support portion 310. The second support portion 310 is connected to the inner peripheral edge of the first support portion 320 and is arranged at an angle with the first support portion 320. The second support portion 310 is clamped between the first bottom plate 110 and the second bottom plate 210. In view of the setting of the second support portion 310, a support layer can be constructed between the first bottom plate 110 and the second bottom plate 210, which helps to improve the structural strength of the bottom of the battery tray.

[0081] Specifically, as shown in Figure 1 , Figure 6 , Figure 8 and Figure 9 , the orthographic projection of the second support portion 310 on the projection plane covers a part of the first bottom plate 110, and the projection plane is perpendicular to the thickness direction of the first bottom plate 110.

[0082] The above setting method enables only a part of the structure of the support layer 300 to be clamped between the first bottom plate 110 and the second housing 200. Thus, on the one hand, the structural strength of the bottom of the battery tray is increased by the remaining part, and on the other hand, the weight of the support layer 300 is reduced by the removed part, so that the battery tray has the advantages of high structural strength and light weight.

[0083] Furthermore, in some embodiments, the area S1 of the orthographic projection of the second support portion 310 covering the first bottom plate 110 and the area S2 of the first bottom plate 110 satisfy: 0.1 ≤ S1:S2 ≤ 0.5.

[0084] Wherein, with the surface of the first bottom plate 110 perpendicular to its own thickness direction as the projection plane, the second support portion 310 is orthographically projected onto the projection plane, and the projected area projected on the projection plane is the area S1. The first bottom plate 110 is placed on a horizontal plane, and the area of the horizontal plane covered by the first bottom plate 110 is the area S2.

[0085] It should be noted that the smaller the ratio of S1 to S2, the smaller the weight of the support layer 300, but the structural enhancement effect on the battery tray will be reduced; the larger the ratio of S1 to S2, the larger the weight of the support layer 300, but the structural enhancement effect on the battery tray will be improved. In this embodiment, making the ratio of S1:S2 between 0.1 and 0.5 can reduce the weight of the battery tray while meeting the structural strength of the battery tray 10, so as to achieve the balance between structural strength and energy density.

[0086] Exemplarily, the values that the ratio of S1:S2 can take include but are not limited to 0.1, 0.2, 0.3, 0.4, and 0.5.

[0087] As shown in Figures 1 to 6 , in some embodiments, the support layer 300 includes a plurality of first convex portions 331 and a plurality of second convex portions 332. Each first convex portion 331 abuts against the first housing 100, and each second convex portion 332 abuts against the second housing 200. The plurality of first convex portions 331 and the plurality of second convex portions 332 are alternately arranged in the circumferential direction of the support layer 300.

[0088] In view of the fact that the first convex portion 331 and the second convex portion 332 are alternately arranged in the circumferential direction of the support layer 300, the first convex portion 331 and the second convex portion 332 form a "wavy structure", which reduces the weight while ensuring the structural strength of the support layer 300.

[0089] Exemplarily, the thickness of the first convex portion 331 or the second convex portion 332 can be 0.8 mm. The first convex portion 331 can be formed by stamping the support layer 300. The second convex portion 332 can also be formed by stamping the support layer 300.

[0090] As Figure 5 shown, in some embodiments, in addition to being clamped between the first housing and the second housing by the fastener 400, the support layer 300 can also be adhesively connected to the first housing 100 and / or the second housing 200 through an adhesive layer to further improve the connection stability of the support layer 300.

[0091] Exemplarily, the battery tray includes a first adhesive layer 610, and the first adhesive layer 610 includes a plurality of first adhesive portions, and the first adhesive portions are arranged between the surface of the second convex portion 332 facing away from the second housing 200 and the first housing 100.

[0092] The first adhesive portion can not only connect the support layer 300 and the first housing 100, but also form a support between the second convex portion 332 and the first housing 100, avoiding the support layer 300 being crushed after the first housing 100 and the second housing 200 are tightly connected.

[0093] Correspondingly, the battery tray can also include a second adhesive layer 620, and the second adhesive layer 620 includes a plurality of second adhesive portions, and the second adhesive portions are arranged between the surface of the first convex portion 331 facing away from the first housing 100 and the second housing 200.

[0094] The second adhesive portion can not only connect the support layer 300 and the second housing 200, but also form a support between the first convex portion 331 and the second housing 200, avoiding the support layer 300 being crushed after the first housing 100 and the second housing 200 are tightly connected.

[0095] It should be noted that the first adhesive layer 610 and the second adhesive layer 620 can be low-density structural adhesives, and the density of the low-density structural adhesives can be guaranteed to be between 0.76 g / cm 3 -0.8 g / cm 3 between.

[0096] Furthermore, as Figures 1 to 4 shown, in some embodiments, the first flange plate 122 includes a first flange edge 1221 and a first lug 1222, and the first mounting hole 123 is arranged on the first lug 1222;

[0097] The second flange plate 222 includes a second flange edge 2221 and second lugs 2222, and the second mounting holes 223 are provided in the second lugs 2222. The first support portion 320 includes a third side frame 321 and a third flange plate 323. The third side frame 321 is disposed on the circumferential outer side of the second support portion 310 and is disposed at an angle with the second support portion 310. The third flange plate 323 is disposed on the circumferential outer side of the third side frame 321. The third side frame 321 is clamped between the first enclosing plate 120 and the second enclosing plate 220, and the third flange plate 323 is clamped between the first flange edge 1221 and the second flange edge 2221. That is to say, in this structure, the third flange plate 323 does not have flange holes and lacks the part clamped between the first lug 1222 and the second lug 2222. The third flange plate 323 only includes the part clamped between the first flange edge 1221 and the second flange edge 2221, thereby further reducing the weight of the support layer 300.

[0098] Further, the battery tray further includes a fastener 400. The fastener 400 passes through the first mounting hole 123 and the second mounting hole 223, thereby achieving the effect of fastening the first housing 100, the second housing 200, and the support layer 300. Continuing to refer to Figures 1 to 4 As shown, since both the first lug 1222 and the second lug 2222 protrude from the third flange plate 323, that is, there is no support layer 300 between the first lug 1222 and the second lug 2222. If there is a gap left between the first lug 1222 and the second lug 2222, after the fastener 400 is installed, the first lug 1222 and the second lug 2222 are likely to be deformed under the action of extrusion stress.

[0099] To solve the above problems, the thickness of the first lug 1222 can be increased so that the thickness of the first lug 1222 is greater than the thickness of the first flange edge 1221, and the thickness of the first lug 1222 is increased to be sufficient to abut against the second lug 2222, thereby ensuring the connection area between the first lug 1222 and the second lug 2222.

[0100] Exemplarily, the first flange edge 1221 can have the same thickness as the second flange edge 2221. For example, the thickness of the first flange edge 1221 is 2.5 mm. The thickness of the first lug 1222 can be 12 mm.

[0101] Of course, in other embodiments, the thickness of the second lug 2222 can also be increased so that the thickness of the second lug 2222 is greater than the thickness of the second flange edge 2221, and the thickness of the second lug 2222 is increased to be sufficient to abut against the first lug 1222.

[0102] Furthermore, since the second support portion of the support layer 300 only covers a part of the first bottom plate 110, if a gap is formed at the position where the second support portion does not cover the first bottom plate 110, it is likely to affect the strength of the bottom plate of the battery tray 10.

[0103] In view of this, as Figure 3 shown, the second bottom plate 210 can include a third boss 211 protruding toward the first bottom plate 110. The third boss 211 abuts against the first bottom plate 110, and the support layer 300 is located on the circumferential outer side of the third boss 211, thereby avoiding the formation of a gap between the first bottom plate 110 and the second bottom plate 210 and ensuring the structural strength of the battery tray 10.

[0104] Exemplarily, the thickness of the first bottom plate 110 can be the same as the thickness of the second bottom plate 210. For example, the thickness of the first bottom plate 110 can be 0.8 mm.

[0105] It should be noted that, as Figures 1 to 6 shown, in some embodiments, the materials of the first housing, the second housing, and the support layer can be low-density composite materials.

[0106] It should also be noted that, as Figures 1 to 6 shown, the height of the battery tray can be set to be relatively low, which can ensure that the battery cells can be directly stacked on the first bottom surface of the first housing, and then the battery cell connection tabs are welded, reducing processes such as tray inversion and package flipping, and greatly improving the production efficiency. Compared with the prior art, the battery tray design uses a composite material with a lower density, and the adhesive used is also a low-density structural adhesive, significantly reducing the weight of the battery tray, increasing the energy density of the whole package. At the same time, a sandwich-like structure is adopted to enhance the strength of the entire battery tray, ensuring the safety and reliability of the battery pack. In addition, the battery tray also reduces the production processes of the composite material tray, improves the production efficiency, and reduces the production cost.

[0107] In other embodiments, the materials of the first housing and the second housing can be carbon fiber or glass fiber, with a density of 1.6 kg / cm³ to 2.0 kg / cm³. The support layer can be a foamed part, a honeycomb part, and an adhesive part. The first housing, the second housing, and the support layer can be molded by an integral molding process, and this molding method can not only ensure the strength of the overall structure but also easily achieve the airtightness of the entire battery tray.

[0108] As Figure 1 and Figure 6As shown, in some embodiments, the battery tray further includes at least two limiting beams 500. A second accommodation cavity 101 is formed between the first bottom plate 110 and the first surrounding plate 120 of the first housing 100. The limiting beams 500 are located in the second accommodation cavity 101. At least two limiting beams 500 are arranged in the second accommodation cavity at intervals, and batteries are arranged between at least two limiting beams 500. It should be noted that the production process of the limiting beams 500 can be a pultrusion process.

[0109] Exemplarily, the thickness of the limiting beam 500 can be 2.0 mm. At the same time, a reinforcing rib structure is arranged inside the limiting beam 500, and the strength of the limiting beam 500 is increased by the 2.5-mm reinforcing rib structure. The limiting beam 500 can be bonded in the first housing 100 through a low-density structural adhesive to realize the assembly of the limiting beam 500 and the first housing 100.

[0110] The following describes in conjunction with the drawings Figures 1 to 9 the fixing methods of the first housing 100, the second housing 200, and the support layer 300 in the embodiments.

[0111] Specifically, a first mounting hole 123 is provided on the first flange plate 122, a second mounting hole 223 is provided on the second flange plate 222, and a third mounting hole 324 is provided on the third flange plate 323. The battery tray further includes a fastener 400. The fastener 400 sequentially passes through the first mounting hole 123, the third mounting hole 324, and the second mounting hole 223 to clamp the support layer 300 between the first housing 100 and the second housing 200.

[0112] As Figure 6 shown, in order to reduce the fastening stress of the fastener 400 on the battery tray, the fastener 400 can include two parts, that is, the fastener 400 can include a first fastening part 410 and a second fastening part 420. The fastening stress of the fastener 400 on the flange plate is reduced by clamping the first flange plate 122 and the second flange plate 222 between the first fastening part 410 and the second fastening part 420.

[0113] Specifically, a threaded hole is provided in the first fastening part 410, and a threaded post 422 is provided on the second fastening part 420. The first flange plate 122 and the second flange plate 222 are clamped between the first fastening part 410 and the second fastening part 420 by passing the threaded post 422 through the first mounting hole 123 and the second mounting hole 223 and connecting it to the threaded hole.

[0114] Specifically, in some embodiments, the first fastening part 410 includes a fixing column 411, the threaded hole is arranged in the fixing column 411, and the second fastening part 420 includes a first fastening ring 421 and a threaded post 422 connected to the first fastening ring 421.

[0115] During installation, the fixing post 411 is located on the side of the first flange plate 122 away from the second flange plate 222, and the first fastening ring 421 is located on the side of the second flange plate 222 away from the first flange plate 122. After the threaded post 422 passes through the first mounting hole 123 and the second mounting hole 223 in sequence and is connected to the threaded hole, the first flange plate 122 and the second flange plate 222 are clamped between the fixing post 411 and the first fastening ring 421.

[0116] In view of the fact that both the fixing post 411 and the first fastening ring 421 have a certain width, the fixing post 411 has a certain contact area with the first flange plate 122, and there is also a certain contact area between the first fastening ring 421 and the second flange plate 222, thereby reducing the extrusion stress on the first flange plate 122 and the second flange plate 222 and reducing the risk of the first flange plate 122 and the second flange plate 222 being crushed.

[0117] It should be noted that adopting the structure of the first fastening part 410 and the second fastening part 420 enables the fastener 400 to have a relatively high structural strength. At the same time, it can also reduce the extrusion stress received by the battery tray 10, so that the pressing force of the fastener 400 can reach thousands of Newtons.

[0118] As Figure 9 shown, in some embodiments, the first fastening part 410 can also be set to a structure similar to that of the second fastening part 420. Specifically, the second fastening part 420 includes a first fastening ring 421 and a threaded post 422 connected to the first fastening ring 421; the first fastening part 410 includes a second fastening ring and a threaded sleeve connected to the second fastening ring, and the threaded hole is arranged in the threaded sleeve. The threaded post 422 passes through the first mounting hole 123 and the second mounting hole 223 and is connected to the threaded hole, thereby clamping the first flange plate 122 and the second flange plate 222 between the first fastening ring 421 and the second fastening ring.

[0119] In the above structure, the functions of the first fastening ring 421 and the second fastening ring are both to increase the contact area between the fastener and the flange plate, thereby reducing the extrusion stress on the first flange plate 122 and the second flange plate 222 and reducing the risk of the first flange plate 122 and the second flange plate 222 being crushed.

[0120] It should also be noted that, as Figure 8 and Figure 9 shown, when the height of the battery tray is relatively high, the height of the first support part 320 will increase accordingly. In order to further reduce the weight of the support layer 300, a weight reduction hole 340 can be provided on the first support part 320.

[0121] Exemplarily, there are multiple weight reduction holes 340. The multiple weight reduction holes 340 are spaced apart on the first support portion 320. The entity structure is provided between the mutually spaced weight reduction holes 340, which can ensure the structural strength of the support layer 300 while reducing the weight of the support layer 300.

[0122] Such as Figure 8 and Figure 9 , a through hole 800 is further provided on the battery tray. The through hole 800 penetrates through the first surrounding plate 120, the first support portion 320, and the second surrounding plate 220 in sequence. The through hole 800 can be used for threading connection lines, installing high-voltage connectors, installing low-voltage connectors, or installing explosion-proof valves.

[0123] To enhance the structural strength at the through hole 800 and reduce the probability of damage to the battery tray at the through hole 800, the battery tray 10 further includes a protective fastener 700 disposed in the through hole 800. The first surrounding plate 120, the first support portion 320, and the second surrounding plate 220 are clamped between the protective fasteners 700. On the one hand, the protective fastener 700 can protect the structure at the through hole 800.

[0124] In some embodiments, the protective fastener 700 includes a first connecting member 710 and a second connecting member 720. The first connecting member 710 includes a first crimping ring 711 and a first connecting portion 712 disposed on the inner edge of the first crimping ring 711. The second connecting member 720 includes a second crimping ring and a second connecting portion disposed on the inner edge of the second crimping ring. The first connecting member 710 and the second connecting member 720 respectively penetrate into the through hole 800 from both sides of the through hole 800, and the first connecting portion 712 and the second connecting portion are fixedly connected to clamp the first surrounding plate 120, the first support portion 320, and the second surrounding plate 220 between the first crimping ring 711 and the second crimping ring.

[0125] Specifically, the first connecting portion 712 can be a threaded sleeve, and the second connecting portion can be a threaded post. A through hole is provided in the threaded post to achieve the specific function of the protective fastener 700. Exemplarily, the through hole can be used for plugging high-voltage components, low-voltage components, or installing explosion-proof valves.

[0126] The protective fastener 700 can protect the structure at the through hole 800 and can also further fix the first housing 100, the support layer 300, and the second housing 200. In addition, the first crimping ring 711 and the second crimping ring of the protective fastener 700 help to reduce the fastening stress of the protective fastener 700 and reduce the probability of the battery tray 10 being crushed while playing a fixing role.

[0127] The present application also provides a battery pack, including the above-mentioned battery tray.

[0128] In view that the battery pack includes the battery tray 10 described in any of the above embodiments, the battery pack also has the beneficial effects of the battery tray, and the beneficial effects are not described in detail herein in this embodiment.

[0129] An embodiment of the present application further provides an electrical device, including an electrical device and the battery pack described in any of the above embodiments, and the battery pack is used to provide electrical energy for the electrical device.

[0130] The electrical device in the embodiment of the present application can be a vehicle. For example, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range electric vehicle, etc. Correspondingly, the electrical device can be a driving mechanism of the vehicle or a control system of the vehicle.

[0131] In addition, the electrical device can also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecrafts, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles or spaceships.

[0132] In view that the electrical device in this embodiment includes the battery pack described in any of the above embodiments, therefore, the electrical device includes the battery pack structure and beneficial effects, and the beneficial effects are not described in detail herein in this embodiment.

[0133] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0134] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0135] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims and drawings of the present application are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0136] In addition, the terms "comprise" and "include" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or apparatuses.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery tray, characterized in that, Comprising: A first housing (100), including a first bottom plate (110) and a first surrounding plate (120) connected to the circumferential edge of the first bottom plate (110); A second housing (200), the second housing (200) including a second bottom plate (210) and a second surrounding plate (220) connected to the circumferential edge of the second bottom plate (210), the second bottom plate (210) and the second surrounding plate (220) enclosing a first accommodation cavity (202), and the first housing (100) being disposed in the accommodation cavity (102); A support layer (300), including a first support portion (320), the first support portion (320) being clamped between the first surrounding plate (120) and the second surrounding plate (220).

2. The battery tray according to claim 1, wherein, The orthographic projection of the first support portion (320) on the projection plane is offset from the first bottom plate (110), and the projection plane is perpendicular to the thickness direction of the first bottom plate (110).

3. The battery tray according to claim 2, characterized in that, The first surrounding plate (120) includes a first side frame (121) and a first flange plate (122), one end of the first side frame (121) being connected to the circumferential edge of the first bottom plate (110) and being disposed at an angle to the first bottom plate (110), and the first flange plate (122) being connected to the circumferential edge of the other end of the first side frame (121) and extending in a direction away from the accommodation cavity; The second surrounding plate (220) includes a second side frame (221) and a second flange plate (222), one end of the second side frame (221) being connected to the circumferential edge of the second bottom plate (210) and being disposed at an angle to the second bottom plate (210), and the second flange plate (222) being connected to the circumferential edge of the second side frame (221) and extending in a direction away from the accommodation cavity, and the first support portion (320) being clamped between the first flange plate (122) and the second flange plate (222).

4. The battery tray according to claim 3, wherein, The first support portion (320) includes a third flange plate (323), the third flange plate (323) being clamped between the first flange plate (122) and the second flange plate (222).

5. The battery tray according to claim 4, characterized in that, The first support portion (320) further includes a third side frame (321) connected to the inner edge of the third flange plate (323), the third side frame (321) being disposed at an angle to the third flange plate (323), and the third side frame (321) being clamped between the first side frame (121) and the second side frame (221).

6. The battery tray according to claim 3, wherein, The support layer (300) further includes a second support portion (310), the second support portion (310) being connected to the inner circumferential edge of the first support portion (320) and being disposed at an angle to the first support portion (320), and the second support portion (310) being clamped between the first bottom plate (110) and the second bottom plate (210).

7. The battery tray according to claim 6, wherein The orthographic projection of the second support portion (310) on the projection plane covers part of the first bottom plate (110), and the projection plane is perpendicular to the thickness direction of the first bottom plate (110).

8. The battery tray according to claim 7, characterized in that, The area S1 covered by the orthographic projection of the second support part (310) on the first base plate (110) and the area S2 of the first base plate (110) satisfy: 0.1 ≤ S1:S2 ≤ 0.

5.

9. The battery tray according to claim 6, wherein, The support layer (300) includes a plurality of first convex parts (331) and a plurality of second convex parts (332). Each of the first convex parts (331) abuts against the first housing (100), and each of the second convex parts (332) abuts against the second housing (200). The plurality of first convex parts (331) and the plurality of second convex parts (332) are alternately arranged in the circumferential direction of the support layer.

10. The battery tray according to claim 9, wherein, The support layer (300) is adhesively connected to the first housing (100) and / or the second housing (200).

11. The battery tray according to claim 10, wherein The battery tray includes a first adhesive layer (610). The first adhesive layer (610) includes a plurality of first adhesive parts, and the first adhesive parts are arranged between the surface of the second convex part (332) facing away from the second housing (200) and the first housing (100); and / or The battery tray includes a second adhesive layer (620). The second adhesive layer (620) includes a plurality of second adhesive parts, and the second adhesive parts are arranged between the surface of the first convex part (331) facing away from the first housing (100) and the second housing (200).

12. The battery tray according to claim 6, characterized in that, The first support part (320) includes a third side frame (321) and a third flange plate (323). The third side frame (321) is arranged on the circumferential outer side of the second support part (310) and is arranged at an angle with the second support part (310). The third flange plate (323) is arranged on the circumferential outer side of the third side frame (321). The third side frame (321) is clamped between the first enclosing plate (120) and the second enclosing plate (220), and the third flange plate (323) is clamped between the first flange plate (122) and the second flange plate (222).

13. The battery tray according to claim 12, wherein, The first flange plate (122) includes a first flange edge (1221) and a first lug (1222), and a first mounting hole (123) is arranged on the first lug (1222); The second flange plate (222) includes a second flange edge (2221) and a second lug (2222), and a second mounting hole (223) is arranged on the second lug (2222); The battery tray further includes a fastener (400), and the fastener (400) passes through the first mounting hole (123) and the second mounting hole (223).

14. The battery tray according to claim 13, wherein Both the first lug (1222) and the second lug (2222) protrude from the third flange plate (323); The thickness of the first lug (1222) is greater than the thickness of the first flange edge (1221), and the first lug (1222) abuts against the second lug (2222); Or, The thickness of the second lug (2222) is greater than the thickness of the second flange edge (2221), and the second lug (2222) abuts against the first lug (1222).

15. The battery tray according to claim 5, characterized in that, The second bottom plate (210) comprises a third boss (211) protruding toward the first bottom plate (110), the third boss (211) abuts against the first bottom plate (110), and the support layer (300) is located on the circumferential outer side of the third boss (211).

16. The battery tray according to any one of claims 1 to 15, characterized in that The battery tray further comprises at least two limiting beams (500); the first bottom plate (110) and the first enclosure plate (120) enclose a second accommodating cavity (101); the at least two limiting beams (500) are arranged in the second accommodating cavity and are arranged at intervals; and the battery is arranged between the at least two limiting beams (500).

17. The battery tray according to claim 4 or 5, characterized in that, The first flange plate (122) is provided with a first mounting hole (123), the second flange plate (222) is provided with a second mounting hole (223), and the third flange plate (323) is provided with a third mounting hole (324). The battery tray also includes a fastener (400), and the fastener (400) is sequentially passed through the first mounting hole (123), the third mounting hole (324) and the second mounting hole (223) to clamp the support layer (300) between the first shell (100) and the second shell (200).

18. The battery tray according to claim 17, wherein The fastener (400) includes a first fastening portion (410) and a second fastening portion (420), wherein the first fastening portion (410) is provided with a threaded hole, and the second fastening portion (420) is provided with a threaded column (422), wherein the threaded column (422) passes through the first mounting hole (123) and the second mounting hole (223) and is connected to the threaded holes, and the first flange plate (122) and the second flange plate (222) are clamped between the first fastening portion (410) and the second fastening portion (420).

19. The battery tray according to claim 18, characterized in that: The first fastening portion (410) includes a fixing column (411), and the threaded hole is arranged in the fixing column (411); the second fastening portion (420) includes a first fastening ring (421) and a threaded column (422) connected to the first fastening ring (421), the fixing column (411) is located on the side of the first flange plate (122) away from the second flange plate (222), and the first fastening ring (421) is located on the side of the second flange plate (222) away from the first flange plate (122); the threaded column (422) is penetrated through the first mounting hole (123) and the second mounting hole (223) and connected to the threaded hole, and the first flange plate (122) and the second flange plate (222) are clamped between the fixing column (411) and the first fastening ring (421).

20. The battery tray according to claim 19, wherein, The second fastening portion (420) includes a first fastening ring (421) and a threaded post (422) connected to the first fastening ring (421); the first fastening portion (410) includes a second fastening ring and a threaded sleeve connected to the second fastening ring, the threaded hole is provided in the threaded sleeve, the threaded post (422) passes through the first mounting hole (123) and the second mounting hole (223) and is connected into the threaded hole, and the first flange plate (122) and the second flange plate (222) are clamped between the first fastening ring (421) and the second fastening ring.

21. The battery tray according to any one of claims 1 to 15, characterized in that, A through hole (800) is further provided on the battery tray, the through hole (800) penetrates through the first surrounding plate (120), the first supporting portion (320) and the second surrounding plate (220) in sequence, the battery tray further includes a protective fastener (700) passing through the through hole (800), and the first surrounding plate (120), the first supporting portion (320) and the second surrounding plate (220) are clamped between the protective fasteners (700).

22. The battery tray according to claim 21, characterized in that, The protective fastener (700) includes a first connecting member (710) and a second connecting member (720), the first connecting member (710) includes a first crimping ring (711) and a first connecting portion (712) provided on the inner edge of the first crimping ring (711), the second connecting member (720) includes a second crimping ring and a second connecting portion provided on the inner edge of the second crimping ring, the first connecting member (710) and the second connecting member (720) respectively penetrate into the through hole (800) from both sides of the through hole (800), and the first connecting portion (712) and the second connecting portion are fixedly connected to clamp the first surrounding plate (120), the first supporting portion (320) and the second surrounding plate (220) between the first crimping ring (711) and the second crimping ring.

23. A battery pack, characterized in that, Comprising the battery tray according to any one of claims 1-22.

24. An electrical device, characterized in that, Comprising an electrical device and the battery pack according to claim 23, the battery pack being used to supply electrical energy to the electrical device.

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