Tray assembly, battery pack and vehicle

Abstract

The utility model discloses a tray assembly, a battery pack and a vehicle, the tray assembly comprises a first tray layer, a second tray layer and a third tray layer, one side of the first tray layer is concavely provided with a containing cavity suitable for containing a discharge core; the second tray layer is suitable for bearing the first tray layer, the second tray layer is located on the side, away from the containing cavity, of the first tray, and the first tray layer and the second tray layer are fixedly connected through a first fastener. According to the tray assembly disclosed by the utility model, the first tray layer and the second tray layer can be fixedly connected together through the arranged first fastener, so that the connection of the first tray layer and the second tray layer does not have a welding process, the thermal deformation of the tray structure can be avoided, the flatness of the tray structure can be improved, and the yield of the tray assembly can be improved; and the sealing performance of the battery pack can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a tray assembly, a battery pack and a vehicle. Background Art

[0002] In the related art, the main body of a stamped pallet is generally welded from two layers of stamped parts. However, the thermal deformation generated during the welding process is large and difficult to accurately control. The large thermal deformation causes large deformation of the tray installation plane and sealing surface, which in turn affects the performance and airtightness of the battery pack. Utility Model Content

[0003] The first object of the utility model is to provide a new technical solution for a tray assembly, which can at least solve the technical problem that thermal deformation may occur during the preparation of the existing battery tray.

[0004] The second object of the present utility model is to provide a new technical solution for a battery pack.

[0005] The third object of the present invention is to provide a new technical solution for a vehicle.

[0006] According to a first aspect of the utility model, a tray assembly is provided, comprising: a first tray layer, a side of the first tray layer being provided with a receiving cavity suitable for receiving a discharge core; a second tray layer, the second tray layer being suitable for receiving the first tray layer, the second tray layer being located on a side of the first tray away from the receiving cavity, the first tray layer and the second tray layer being fixedly connected by a first fastener.

[0007] Optionally, a first flange portion is provided on an outer periphery of the first pallet layer, a second flange portion is provided on an outer periphery of the second pallet layer, and the first fastener connects the first flange portion and the second flange portion.

[0008] Optionally, a buffer cavity is defined between the first pallet layer and the second pallet layer, and the buffer cavity is located at the periphery of the accommodating cavity.

[0009] Optionally, the buffer cavity is filled with a first buffer body, and the first buffer body supports the inner wall surface of the buffer cavity.

[0010] Optionally, the pallet assembly further includes: a bottom guard plate, which is arranged on the side of the second pallet layer facing away from the first pallet layer, and the bottom guard plate is fixedly connected to the second pallet layer by a second fastener, wherein a buffer groove is recessed on the side of the bottom guard plate close to the second pallet layer, and / or a buffer groove is recessed on the side of the second pallet layer close to the bottom guard plate, and the buffer groove corresponds to the position of the bottom of the accommodating cavity.

[0011] Optionally, the buffer groove is filled with a second buffer body, and the second buffer body supports the bottom guard plate.

[0012] Optionally, the pallet assembly further includes: two expansion beams, the two expansion beams being located on both sides of the accommodating cavity in its width direction, the expansion beams being arranged on a side of the first pallet layer facing away from the second pallet layer, wherein the expansion beams are fixedly connected to the first pallet layer by a third fastener, and a glue connection layer is provided between the expansion beams and the first pallet layer to connect them to each other.

[0013] Optionally, the expansion beam and / or the first pallet layer is provided with a receiving groove suitable for receiving a glue connection layer.

[0014] Optionally, one end of the second fastener is disposed in the buffer cavity, and / or one end of the third fastener is disposed in the buffer cavity.

[0015] Optionally, the pallet assembly further includes: a crossbeam, which is disposed between the two expansion beams, bonded to the first pallet layer, and separates the accommodating cavities, and the crossbeam is fixedly connected to the two expansion beams by fourth fasteners.

[0016] Optionally, the first fastener, the second fastener, the third fastener and the fourth fastener are all rivets or screws.

[0017] Optionally, the pallet assembly further includes: a reinforcing plate, the reinforcing plate being provided on at least one side of the second pallet layer facing away from the first pallet layer in the length direction of the accommodating cavity, the reinforcing plate being fixedly connected to the second pallet layer by a fifth fastener or the first fastener.

[0018] According to a second aspect of the present invention, a battery pack is provided, comprising the tray assembly described in any one of the above items.

[0019] According to a third aspect of the utility model, a vehicle is provided, comprising the above-mentioned battery pack.

[0020] According to the tray assembly of the utility model, the first tray layer and the second tray layer can be fixedly connected together by the first fastener, so that the connection between the first tray layer and the second tray layer does not require a welding process, thermal deformation of the tray structure can be avoided, the flatness of the tray structure can be improved, the yield rate of the tray assembly can be improved, and the sealing performance of the battery pack can be guaranteed.

[0021] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] Figure 1 It is a structural schematic diagram of a tray assembly according to an embodiment of the utility model;

[0024] Figure 2 is a cross-sectional view of a partial structure of a tray assembly according to an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the connection between the expansion beam and the cross beam of a pallet assembly according to an embodiment of the utility model;

[0026] Figure 4 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0027] Figure 5 It is a structural schematic diagram of a harmonica tube of a battery pack installed on a tray assembly according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] Tray assembly 100;

[0030] A first pallet layer 10; a first flange portion 11;

[0031] The second tray layer 20; the second flange portion 21; the buffer groove 22;

[0032] First buffer body 30; bottom guard plate 40;

[0033] Expansion beam 50; Glue connection layer 51;

[0034] Crossbeam 60; reinforcing plate 70; L-shaped connecting plate 80;

[0035] A first fastener a; a second fastener b; a third fastener c; a fourth fastener d;

[0036] Battery pack 200 ; battery cell 210 ; temperature balancing plate 220 ; harmonica tube 230 ; tray cover 240 . DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] The tray assembly 100 according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 2 As shown, the pallet assembly 100 according to the embodiment of the present invention includes: a first pallet layer 10 and a second pallet layer 20 .

[0044] Specifically, one side of the first pallet layer 10 is recessed with a receiving cavity suitable for accommodating the discharge core 210, and the second pallet layer 20 is suitable for accommodating the first pallet layer 10. The second pallet layer 20 is located on the side of the first pallet away from the receiving cavity, and the first pallet layer 10 and the second pallet layer 20 are fixedly connected by a first fastener a.

[0045] In other words, if Figure 1 and Figure 2 As shown, the pallet assembly 100 according to the embodiment of the utility model mainly includes a first pallet layer 10 and a second pallet layer 20, wherein the first pallet layer 10 can be a stamped part stamped from a metal plate, that is, a receiving cavity for receiving the battery cell 210 can be stamped out on one side of the first pallet layer 10 by stamping, and the bottom surface of the receiving cavity can be used as a mounting surface for supporting the battery cell 210, and the second pallet layer 20 can also be a stamped part stamped from a metal plate, that is, a mounting cavity adapted to the side of the first pallet layer 10 away from the receiving cavity can be stamped out on one side of the second pallet layer 20 by stamping, so that the second pallet layer 20 can receive the first pallet layer 10 on the side of the first pallet layer 10 away from the receiving cavity, and the first pallet layer 10 and the second pallet layer 20 can be tightly fixed together by one or more first fasteners a to form a pallet structure.

[0046] In this embodiment, the first fastener a can be a rivet, such as an SPR screw, which tightly connects the first tray layer 10 and the second tray layer 20 by riveting, so as to avoid the influence of thermal deformation on the installation surfaces of the tray structure (for example, the installation plane of the battery cell 210 of the tray structure and the sealing surface of the whole package). In addition, the first fastener a can also be a stud or other structure, which will not be described in detail in this embodiment.

[0047] Therefore, according to the tray assembly 100 of the embodiment of the utility model, the first tray layer 10 and the second tray layer 20 can be fixedly connected together by the first fastener a, so that the connection between the first tray layer 10 and the second tray layer 20 does not require a welding process, which can avoid thermal deformation of the tray structure, improve the flatness of the tray structure, improve the yield rate of the tray assembly 100, and ensure the sealing performance of the battery pack 200.

[0048] In some specific embodiments of the present invention, a first flange portion 11 is provided on the periphery of the first pallet layer 10 , a second flange portion 21 is provided on the periphery of the second pallet layer 20 , and a first fastener a connects the first flange portion 11 and the second flange portion 21 .

[0049] Specifically, Figure 2 and Figure 5 As shown, the outer periphery of the first pallet layer 10 has an annular first flange portion 11, and the outer periphery of the second pallet layer 20 has an annular second flange portion 21. The second flange portion 21 is fitted with the side of the first flange portion 11 that is close to each other. The first flange portion 11 and the second flange portion 21 can be fixedly connected together by multiple first fasteners a. The multiple first fasteners a can be distributed at intervals along the circumference of the accommodating cavity, so that the first flange portion 11 and the second flange portion 21 can be fixed at different positions, thereby realizing the connection between the first pallet layer 10 and the second pallet layer 20.

[0050] The first flange portion 11 and the second flange portion 21 are formed to be connected to the tray cover 240 of the battery pack 200, and the surface of the first flange portion 11 facing away from the second flange portion 21 is formed to be a sealing surface suitable for the tray cover 240. In this embodiment, since there is no welding process in the connection process between the first flange portion 11 and the second flange portion 21, the flatness of the surface of the first flange portion 11 and the inner wall surface of the accommodating cavity can be ensured, which can effectively improve the yield rate of the tray assembly 100.

[0051] Furthermore, the distance between two adjacent first fasteners a is 80 mm to 100 mm.

[0052] According to an embodiment of the present invention, a buffer cavity is defined between the first pallet layer 10 and the second pallet layer 20 , and the buffer cavity is located at the periphery of the accommodating cavity.

[0053] That is to say, Figure 1 and Figure 2 As shown, in order to improve the protection capability of the tray assembly 100 to the periphery of the battery cell 210, a buffer cavity surrounding the accommodating cavity is provided on the side where the first pallet layer 10 and the second pallet layer 20 are close to each other. When the second pallet layer 20 at the periphery of the accommodating cavity is bumped, the deformation of the second pallet layer 20 can be buffered by the buffer cavity between the first pallet layer 10 and the second pallet layer 20, which is beneficial to ensure the shape of the accommodating groove, thereby effectively preventing the battery cell 210 from being damaged.

[0054] In some optional examples of the present invention, the buffer cavity is filled with a first buffer body 30, and the first buffer body 30 supports the inner wall surface of the buffer cavity.

[0055] Specifically, Figure 1 and Figure 2 As shown, when manufacturing the pallet assembly 100, the buffer cavity can be filled with foam glue. After solidification, the foam glue forms a first buffer body 30 that supports the inner wall surface of the buffer cavity. This can improve the structural strength of the pallet assembly 100 and effectively improve the anti-collision strength and sealing of the pallet assembly 100 on the side of the accommodating cavity.

[0056] According to some embodiments of the utility model, the pallet assembly 100 also includes: a bottom guard plate 40, which is arranged on the side of the second pallet layer 20 away from the first pallet layer 10, and the bottom guard plate 40 is fixedly connected to the second pallet layer 20 by a second fastener b, wherein a buffer groove 22 is recessed on the side of the bottom guard plate 40 close to the second pallet layer 20, and / or a buffer groove 22 is recessed on the side of the second pallet layer 20 close to the bottom guard plate 40, and the buffer groove 22 corresponds to the position of the bottom of the accommodating cavity.

[0057] In other words, if Figure 1 As shown, a bottom guard plate 40 is provided on the side of the second pallet layer 20 facing away from the first pallet layer 10 at a position corresponding to the bottom of the accommodating cavity. The bottom guard plate 40 can be fixedly connected to the second pallet layer 20 by one or more second fasteners b (for example, screws), so that the bottom plate and the second pallet layer 20 can be connected without welding, thereby avoiding thermal deformation of the pallet structure and improving the flatness of the pallet structure.

[0058] Furthermore, if Figure 1 As shown, a buffer groove 22 corresponding to the position of the bottom of the accommodating cavity is recessed on one side of the second pallet layer 20 close to the bottom guard plate 40. A buffer groove 22 corresponding to the position of the bottom of the accommodating cavity may also be recessed on one side of the second pallet layer 20 close to the bottom guard plate 40. The side of the second pallet facing away from the buffer groove 22 is in contact with the first pallet layer 10.

[0059] In this embodiment, when the bottom guard plate 40 at the bottom of the accommodating cavity is bumped, the deformation of the bottom guard plate 40 can be buffered by the buffer groove 22 between the second tray layer 20 and the bottom guard plate 40, which is beneficial to ensure the shape of the accommodating groove, thereby effectively preventing the battery cell 210 from being damaged.

[0060] In some specific embodiments of the present invention, the buffer groove 22 is filled with a second buffer body, and the second buffer body supports the bottom guard plate 40 .

[0061] That is to say, when manufacturing the pallet assembly 100, foam glue can be filled into the buffer groove 22. After solidification, the foam glue forms a first buffer body 30 that supports the bottom guard plate 40. This can improve the structural strength of the pallet assembly 100 and effectively improve the anti-collision strength and sealing of the pallet assembly 100 at the bottom of the accommodating cavity.

[0062] Optionally, the first buffer body 30 and the second buffer body are made of elastic materials such as sponge and silicone.

[0063] According to one embodiment of the utility model, the pallet assembly 100 also includes: two expansion beams 50, the two expansion beams 50 are located on both sides of the accommodating cavity in the width direction thereof, the expansion beams 50 are arranged on the side of the first pallet layer 10 away from the second pallet layer 20, wherein the expansion beams 50 are fixedly connected to the first pallet layer 10 by a third fastener c, and a glue connection layer 51 connecting the expansion beams 50 and the first pallet layer 10 to each other is provided.

[0064] Specifically, Figure 1 and Figure 5 As shown, two expansion beams 50 are provided on the side of the first flange portion 11 of the first pallet layer 10 facing away from the second pallet layer 20. In the width direction of the accommodating cavity, the accommodating cavity is located between the two expansion beams 50, and the expansion beam 50 can be fixedly connected with the first flange portion 11 and the second flange portion 21 by a third fastener c (for example, a core-pulling screw). Compared with connection by welding, thermal deformation of the pallet structure can be avoided and the flatness of the pallet structure can be ensured.

[0065] Furthermore, if Figure 2 As shown, in order to improve the connection strength between the expansion beam 50 and the first pallet layer 10 and the sealing of the connection, glue can be applied on the connection surface between the expansion beam 50 and the first flange portion 11. After the glue is cured, a glue connection layer 51 connecting each other can be formed, thereby effectively improving the connection strength between the expansion beam 50 and the first pallet layer 10 and ensuring the sealing of the connection between the expansion beam 50 and the first pallet layer 10.

[0066] In some optional examples of the present invention, the expansion beam 50 and / or the first pallet layer 10 is provided with a receiving groove suitable for receiving the glue connection layer 51 .

[0067] That is to say, in order to ensure the reliability of the connection between the expansion beam 50 and the first pallet layer 10, a receiving groove is set on the side of the expansion beam 50 close to the first pallet layer 10, or a receiving groove can be set on the side of the first flange portion 11 of the first pallet layer 10 close to the expansion beam 50. When connecting the expansion beam 50, glue can be filled in the receiving groove, and then the expansion beam 50 and the first pallet layer 10 are connected together through the third fastener c. After the glue is cured, a glue connecting layer 51 with a set thickness can be formed, thereby ensuring the reliability of the connection between the expansion beam 50 and the first pallet layer 10, and the set receiving groove can effectively prevent the glue from overflowing before curing.

[0068] According to some embodiments of the present invention, one end of the second fastener b is disposed in the buffer cavity, and / or one end of the third fastener c is disposed in the buffer cavity.

[0069] Specifically, Figure 1 and Figure 2 As shown, the second pallet layer 20 is provided with a first connecting hole penetrating along its thickness direction at a position corresponding to the buffer cavity on the side facing away from the first pallet layer 10, and the bottom guard plate 40 is provided with a second connecting hole corresponding to the position of the first connecting hole. When connecting the bottom guard plate 40 and the second pallet layer 20, the first end of the second fastener b passes through the second connecting hole and the first connecting hole to fasten the bottom guard plate 40 and the second pallet layer 20 together.

[0070] A third connecting hole penetrating along the thickness direction of the first pallet layer 10 is provided on the side of the first pallet layer 10 facing away from the second pallet layer 20 at a position corresponding to the buffer cavity, and the expansion beam 50 is provided with a fourth connecting hole corresponding to the position of the third connecting hole. When connecting the expansion beam 50 and the first pallet layer 10, the first end of the third fastener c passes through the fourth connecting hole and the third connecting hole to fasten the expansion beam 50 and the first pallet layer 10 together.

[0071] In this embodiment, one end of the second fastener b and one end of the third fastener c are both located in the buffer cavity, which can effectively ensure the flatness of the pallet, and before the second fastener b and the third fastener c are installed, the material for forming the first buffer body 30 can be injected into the buffer cavity through the first connecting hole and the third connecting hole.

[0072] In some specific embodiments of the present invention, the pallet assembly 100 also includes: a crossbeam 60, which is disposed between the two expansion beams 50, and the crossbeam 60 is bonded to the first pallet layer 10. The crossbeam 60 separates the accommodating cavity, and the crossbeam 60 is fixedly connected to the two expansion beams 50 by a fourth fastener d.

[0073] That is to say, Figure 3 and Figure 5As shown, a crossbeam 60 extending along the width direction of the accommodating cavity is provided in the accommodating cavity, and the crossbeam 60 can be bonded to the first pallet layer 10 by an adhesive, and a first end of the crossbeam 60 can be connected to one of the expansion beams 50 by one or more fourth fasteners d (for example, a core-pulling screw), and a second end of the crossbeam 60 can also be connected to another expansion beam 50 by one or more fourth fasteners d. The crossbeam 60 and one of the expansion beams 50 are taken as an example for specific description.

[0074] like Figure 3 As shown, the first end of the cross beam 60 is connected to the expansion beam 50 through an L-shaped connecting plate 80 and a plurality of fourth fasteners d, wherein the expansion beam 50 is provided with a fifth connecting hole, the cross beam 60 is provided with a sixth connecting hole, and the L-shaped connecting plate 80 is provided with a seventh connecting hole corresponding to the fifth connecting hole, and an eighth connecting hole corresponding to the sixth connecting hole. During assembly, one end of the fourth fastener d passes through the seventh connecting hole and the fifth connecting hole, and then the L-shaped connecting plate 80 and the expansion beam 50 are fastened together, and one end of another fourth fastener d passes through the eighth connecting hole and the sixth connecting hole, and then the L-shaped connecting plate 80 and the cross beam 60 are connected together, thereby realizing the connection between the cross beam 60 and the expansion beam 50.

[0075] In this embodiment, the structural strength of the pallet assembly 100 can be further enhanced by setting the crossbeam 60, and the sub-accommodating cavity can be divided into different receiving areas. Moreover, the crossbeam 60 is not connected to the expansion beam 50 and the first pallet layer 10 by welding, which can avoid thermal deformation of the pallet structure and ensure the flatness of the pallet structure.

[0076] According to one embodiment of the utility model, the first fastener a, the second fastener b, the third fastener c and the fourth fastener d are all riveted parts (for example, rivets, and their specific structure can be selected according to actual needs). The riveted parts can provide reliable connection strength and ensure the stability and safety of the tray assembly 100.

[0077] Optionally, the first fastener a, the second fastener b, the third fastener c and the fourth fastener d are all screws, which have a simple structure and are easy to assemble.

[0078] In some optional examples of the present invention, the pallet assembly 100 also includes: a reinforcing plate 70, and a reinforcing plate 70 is provided on at least one side of the second pallet layer 20 facing away from the first pallet layer 10 in the length direction of the accommodating cavity, and the reinforcing plate 70 is fixedly connected to the second pallet layer 20 by a fifth fastener or the first fastener a.

[0079] Specifically, Figure 1 and Figure 4As shown, two reinforcing plates 70 are provided on the side of the second pallet layer 20 facing away from the first pallet layer 10, wherein one of the reinforcing plates 70 is located at the first end of the accommodating cavity in its own length direction, and the other reinforcing plate 70 is located at the second end of the accommodating cavity in its own length direction. The reinforcing plate 70 can be connected to the second flange portion 21 of the second pallet layer 20, that is, the reinforcing plate 70 and the second pallet layer 20 are fastened together by a fifth fastener (for example, a screw). In addition, the reinforcing plate 70 and the second pallet layer 20 can be connected together by a first fastener a, thereby reducing the use of fasteners and facilitating the production and assembly of the pallet assembly.

[0080] In this example, the reinforcing plate 70 is provided to effectively enhance the side strength of the pallet assembly 100, thereby improving the load-bearing capacity and impact resistance of the pallet assembly 100. Furthermore, the reinforcing plate 70 and the second pallet layer 20 can provide sufficient mounting surfaces for the bottom guard plate 40 and the mudguard. At the same time, the reinforcing plate 70 and the second pallet layer 20 are not connected by welding, thereby avoiding thermal deformation of the pallet structure and ensuring the flatness of the pallet structure.

[0081] In summary, according to the tray assembly 100 of the embodiment of the utility model, the first tray layer 10 and the second tray layer 20 can be fixedly connected together by the first fastener a, so that the connection between the first tray layer 10 and the second tray layer 20 does not require a welding process, which can avoid thermal deformation of the tray structure, improve the flatness of the tray structure, improve the yield rate of the tray assembly 100, and ensure the sealing performance of the battery pack 200.

[0082] like Figure 4 and Figure 5 As shown, the embodiment of the utility model further provides a battery pack 200, including the tray assembly 100 described in any of the above embodiments. Since the tray assembly 100 according to the embodiment of the utility model has the above technical effects, the battery pack 200 according to the embodiment of the utility model also has corresponding technical effects, which will not be described in detail in this embodiment.

[0083] Specifically, Figure 4 and Figure 5As shown, the battery pack 200 includes a tray assembly 100, a battery cell 210, a temperature equalizing plate 220, a harmonica tube 230 and a tray cover 240, wherein the battery cell 210 is arranged in the accommodating cavity, the temperature equalizing plate 220 is fixed to the upper side of the battery cell 210 by a heat-conductive structural adhesive to achieve uniform heat dissipation of the battery cell 210, the harmonica tube 230 is defined with a heat exchange flow channel suitable for flowing a heat exchange medium (for example, a refrigerant), the harmonica tube 230 is arranged on the upper side of the temperature equalizing plate 220, the two ends of the harmonica tube 230 are respectively overlapped with two expansion beams 50, and the harmonica tube 230 and the expansion beam 50 are fixedly connected together by screws, and the tray cover 240 is fixedly connected to the side of the first pallet layer 10 away from the second pallet layer 20 by screws.

[0084] The embodiment of the present invention further provides a vehicle, including the battery pack 200 described in the above embodiment. Since the tray assembly 100 according to the embodiment of the present invention has the above technical effects, the vehicle according to the embodiment of the present invention also has corresponding technical effects, which will not be described in detail in this embodiment.

[0085] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tray assembly, characterized in that: include: A first tray layer, wherein a side of the first tray layer is provided with a recessed accommodating cavity suitable for accommodating a discharge core; The second pallet layer is suitable for accommodating the first pallet layer, the second pallet layer is located on a side of the first pallet layer away from the accommodating cavity, and the first pallet layer and the second pallet layer are fixedly connected by a first fastener.

2. The tray assembly according to claim 1, characterized in that: A first flange portion is provided at an outer periphery of the first pallet layer, a second flange portion is provided at an outer periphery of the second pallet layer, and the first fastener connects the first flange portion and the second flange portion.

3. The tray assembly according to claim 1, characterized in that: A buffer cavity is defined between the first pallet layer and the second pallet layer, and the buffer cavity is located at the outer periphery of the accommodating cavity.

4. The tray assembly according to claim 3, characterized in that: The buffer cavity is filled with a first buffer body, and the first buffer body supports the inner wall surface of the buffer cavity.

5. The tray assembly according to claim 2, characterized in that: Also includes: A bottom guard plate, the bottom guard plate is arranged on a side of the second pallet layer away from the first pallet layer, the bottom guard plate is fixedly connected to the second pallet layer by a second fastener, wherein: A buffer groove is recessed on one side of the bottom guard plate close to the second pallet layer, and / or a buffer groove is recessed on one side of the second pallet layer close to the bottom guard plate, and the buffer groove corresponds to the position of the bottom of the accommodating cavity.

6. The tray assembly according to claim 5, characterized in that: The buffer groove is filled with a second buffer body, and the second buffer body supports the bottom guard plate.

7. The tray assembly according to claim 5, characterized in that: Also includes: Two expansion beams, the two expansion beams are located on both sides of the accommodating cavity in its width direction, and the expansion beams are arranged on a side of the first pallet layer away from the second pallet layer, wherein: The expansion beam and the first pallet layer are fixedly connected by a third fastener, and a glue connection layer is provided between the expansion beam and the first pallet layer to connect them.

8. The tray assembly according to claim 7, characterized in that: The expansion beam and / or the first tray layer is provided with a receiving groove suitable for receiving the glue connection layer.

9. The tray assembly according to claim 7, characterized in that: A buffer cavity is defined between the first pallet layer and the second pallet layer, one end of the second fastener is disposed in the buffer cavity, and / or one end of the third fastener is disposed in the buffer cavity.

10. The tray assembly according to claim 7, characterized in that: Also includes: A crossbeam, wherein the crossbeam is disposed between the two expansion beams, the crossbeam is bonded to the first pallet layer, the crossbeam separates the accommodating cavities, and the crossbeam is fixedly connected to the two expansion beams by fourth fasteners.

11. The tray assembly according to claim 10, characterized in that: The first fastener, the second fastener, the third fastener and the fourth fastener are all rivets or screws.

12. The tray assembly according to any one of claims 1 to 11, characterized in that: Also includes: A reinforcing plate is provided on at least one side of the second pallet layer in the length direction of the accommodating cavity on a side facing away from the first pallet layer, and the reinforcing plate is fixedly connected to the second pallet layer by a fifth fastener or the first fastener.

13. A battery pack, characterized in that: A tray assembly comprising the tray assembly of any one of claims 1 to 12.

14. A vehicle, characterized in that: Including the battery pack as claimed in claim 13.

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