Tray assembly, battery device and electric equipment

Abstract

The tray assembly is used for the battery device and comprises a frame and a bottom protective plate, a containing cavity is defined by the frame, the containing cavity is suitable for containing a battery pack, the bottom protective plate is connected with the frame, the containing cavity is sealed by the bottom protective plate, and the weight of a battery pack is reduced.

Description

Technical Field

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

[0002] At present, the existing battery pack includes main components such as battery pack, tray, and bottom guard plate. Among them, the bottom thin plate in the tray mainly serves as a load-bearing component to support the battery pack. At the same time, the bottom thin plate cooperates with the upper cover of the battery pack to achieve airtight protection of the entire pack. The bottom guard plate is used to protect the safety of the bottom of the entire pack, but the battery pack is heavy. Utility Model Content

[0003] The purpose of the utility model is to provide a tray assembly, a battery device and an electrical device to solve the problem of heavy battery packs.

[0004] In order to achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0005] In a first aspect, the utility model provides a tray assembly, comprising: a frame enclosing a receiving cavity, wherein the receiving cavity is suitable for receiving a battery pack; and a bottom guard plate connected to the frame, wherein the bottom guard plate closes the receiving cavity.

[0006] In one embodiment, the four peripheral edges of the bottom guard plate are arranged opposite to and sealed with the four peripheral edges of the frame to seal the accommodating cavity.

[0007] In one embodiment, the tray assembly further includes a sealing ring, which is disposed between the bottom guard plate and the frame. The sealing ring and the bottom guard plate are disposed opposite to four edges of the frame.

[0008] In one embodiment, sealing grooves are formed on four sides of the bottom guard plate and / or the frame, and the sealing ring is received in the sealing groove and abuts between the frame and the bottom guard plate.

[0009] In one embodiment, the frame includes a main body and an extension portion connected to each other, the main body encloses the accommodating cavity, the extension portion extends into the accommodating cavity, and the extension portion is suitable for supporting the battery pack.

[0010] In one embodiment, the width of the extension portion extending into the accommodating cavity is greater than or equal to 50 mm.

[0011] In one embodiment, the main body includes a plurality of side beams connected in sequence, and at least two opposite side beams are connected to the extension portion.

[0012] In one embodiment, the extension portion and the corresponding side beam have an included angle A that satisfies: 60°≤A≤120°.

[0013] In one embodiment, the tray assembly further includes a connecting beam, which connects the two opposite side beams and is located in the accommodating cavity, and the connecting beam is provided with the extension portion on a side facing the side beam provided with the extension portion.

[0014] In one embodiment, the tray assembly further includes a buffer pad, which is disposed on a side of the bottom guard plate facing the accommodating cavity and is adapted to be opposite to the battery pack.

[0015] In one embodiment, a buffer protrusion is provided on a side of the bottom guard plate facing the accommodating cavity, the buffer protrusion is suitable for being arranged opposite to the battery pack, and a filler is provided in the buffer protrusion.

[0016] In a second aspect, the present invention further provides a battery device, comprising a battery pack and a tray assembly as described in any one of the various embodiments of the first aspect, wherein the battery pack is disposed in the accommodating cavity.

[0017] In one embodiment, the frame includes a main body and an extension portion connected to each other, the main body encloses the accommodating cavity, the extension portion extends into the accommodating cavity, the battery pack is supported by the extension portion, and the battery device also includes an adhesive layer, which is arranged between the extension portion and the battery pack, and the adhesive layer is suitable for bonding the extension portion and the battery pack.

[0018] In one embodiment, the battery device further includes a buffer pad, which is arranged on a side of the bottom guard plate facing the accommodating cavity and opposite to the battery pack, and a compression gap is provided between the buffer pad and the battery pack.

[0019] In a third aspect, the present invention further provides an electrical device, comprising an electrical device and a battery device as described in any one of the various embodiments of the second aspect, wherein the battery device is used to supply power to the electrical device.

[0020] By setting a frame and a bottom guard plate, the frame encloses a accommodating cavity, which is suitable for accommodating a battery pack. The bottom guard plate is connected to the frame, and the bottom guard plate closes the accommodating cavity, reducing the bottom plate originally supporting the battery pack, thereby reducing the weight of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is an exploded view of a battery device according to an embodiment;

[0023] Figure 2 yes Figure 1 Cross-sectional view along MM;

[0024] Figure 3 is a structural schematic diagram of a first tray assembly according to an embodiment;

[0025] Figure 4 This is a schematic structural diagram of a second tray assembly according to an embodiment.

[0026] Description of reference numerals:

[0027] 10-tray assembly, 11-main body, 111-accommodation cavity, 12-extension portion, 121-first surface, 13-side beam, 14-sealing pad, 15-bottom guard plate, 151-second surface, 152-sealing groove, 16-buffer pad, 17-sealing ring, 20-battery pack, 201-support surface, 21-sealing cover. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0030] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as commonly understood by those skilled in the art to which this utility model belongs. The terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more of the relevant listed items.

[0031] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0032] At present, the existing battery pack includes main components such as the battery pack 20 and a tray. Among them, the bottom thin plate in the tray mainly serves as a load-bearing component to support the battery pack 20. At the same time, the bottom thin plate cooperates with the upper cover of the battery pack to achieve airtight protection of the entire pack. However, the bottom thin plate increases the weight of the battery pack, resulting in a heavy battery pack.

[0033] In view of the above problems, the present invention provides a tray assembly 10. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , including a frame and a bottom guard plate 15.

[0034] The frame encloses a receiving cavity 111, which is suitable for receiving the battery pack 20. Optionally, the cross-sectional shape of the receiving cavity 111 can be polygonal, circular, elliptical, or irregular. Optionally, the cross-sectional shape of the receiving cavity 111 can be, but is not limited to, a quadrilateral, hexagon, circular, octagonal, elliptical, or irregular.

[0035] The bottom guard plate 15 is connected to the frame, and the bottom guard plate 15 closes the accommodating cavity 111 .

[0036] By setting a frame and a bottom guard plate 15, the frame encloses a accommodating cavity 111, which is suitable for accommodating the battery pack 20. The bottom guard plate 15 is connected to the frame, and the bottom guard plate 15 closes the accommodating cavity 111, reducing the bottom plate originally supporting the battery pack 20, thereby reducing the weight of the battery pack.

[0037] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The four edges of the bottom guard plate 15 are arranged opposite to and sealed with the four edges of the frame to seal the accommodating cavity 111 .

[0038] Optionally, the shape of the bottom guard plate 15 can be polygonal, circular, elliptical and irregular, etc. Optionally, the shape of the bottom guard plate 15 can be, but is not limited to, quadrilateral, pentagon, hexagon, octagon, circular, elliptical and irregular, etc.

[0039] Specifically, the four peripheral edges of the bottom guard plate 15 are arranged opposite to and sealed with the four peripheral edges of the frame, thereby improving the sealing effect of the tray assembly 10 .

[0040] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The tray assembly 10 further includes a sealing ring 17 , which is disposed between the bottom guard plate 15 and the frame. The sealing ring 17 and the bottom guard plate 15 are disposed opposite to each other along four sides thereof facing the frame.

[0041] Optionally, the sealing ring 17 is annular. Optionally, the sealing ring 17 is an elastically deformable structure.

[0042] Specifically, the above arrangement improves the sealing effect of the tray assembly 10 .

[0043] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 Sealing grooves 152 are provided on the four edges of the bottom guard plate 15 and / or the frame. The sealing ring 17 is received in the sealing groove 152 and abuts between the frame and the bottom guard plate 15 .

[0044] Optionally, the sealing groove 152 is prepared by stamping or hot pressing. Optionally, the sealing ring 17 can be attached to the wall of the sealing groove 152 with its own adhesive, and the sealing ring 17 is higher than the surface of the bottom guard plate 15 by a preset size as a compression gap.

[0045] Specifically, the above arrangement improves the sealing structure of the battery pack 20 , making the connection between the sealing ring 17 , the frame and the bottom guard plate 15 compact and saving space.

[0046] Optionally, the tray assembly can use a sealing gasket 14 to meet the overall airtightness requirements of the battery pack 20. For example, the tray assembly includes a sealing gasket 14, and the sealing gasket 14 is arranged between the bottom guard plate 15 and the tray assembly 10. During assembly, the three are tightly matched to achieve a sealing function. Optionally, the sealing gasket 14 includes a first sealing surface and a second sealing surface facing each other, the first sealing surface facing the battery pack 20, and the shape of the first sealing surface can be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the shape of the first sealing surface can be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the shape of the second sealing surface can be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc.

[0047] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The frame includes a main body 11 and an extension portion 12 connected to each other. The main body 11 encloses a receiving cavity 111 , and the extension portion 12 extends into the receiving cavity 111 . The extension portion 12 is suitable for carrying the battery pack 20 .

[0048] Optional, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The extension portion 12 has a first surface 121 , the battery pack 20 includes a support surface 201 , the first surface 121 is adapted to face the battery pack 20 , and the first surface 121 is in close contact with at least a portion of the support surface 201 .

[0049] Optionally, the main body 11 includes multiple side beams 13, and the multiple side beams 13 include a first side beam, a second side beam, a third side beam and a fourth side beam connected in sequence, the first side beam has a first side wall surface, the third side beam has a second side wall surface, the first side wall surface and the second side wall surface are arranged opposite to each other, and the first side wall surface and the second side wall surface are both facing the accommodating cavity 111, one end of the second side beam is connected to the first side beam, and the other end is connected to the third side beam, one end of the fourth side beam is connected to the first side beam, and the other end is connected to the third side beam, the second side beam and the fourth side beam are both provided with an extension portion 12, the extension portion 12 on the second side beam has the first surface 121, and the extension portion 12 on the fourth side beam also has the first surface 121.

[0050] Optionally, the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both connected to the first side wall surface, and the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both connected to the second side wall surface. Optionally, the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both spaced apart from the first side wall surface, and the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both spaced apart from the second side wall surface. Optionally, the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both connected to the first side wall surface, and the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both spaced apart from the first side wall surface, and the first surface 121 on the second side beam and the first surface 121 on the fourth side beam are both connected to the second side wall surface.

[0051] Optionally, the shape of the first surface 121 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the shape of the first surface 121 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the shape of the support surface 201 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the shape of the support surface 201 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc.

[0052] Optionally, the first surface 121 is polished by fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the first surface 121 improves the smoothness of the first surface 121 and avoids scratching the support surface 201 or other parts of the battery pack 20.

[0053] Optionally, the extension portion 12 is connected to the main body 11 and extends into the accommodating cavity 111. The extension portion 12 is adapted to contact the battery pack 20. Specifically, the extension portion 12 is adapted to contact the battery pack 20 and generate a supporting force for the battery pack 20. Therefore, the extension portion 12 can serve as a load-bearing bottom of the battery pack 20.

[0054] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The width of the extension portion 12 extending into the accommodating cavity 111 is greater than or equal to 50 mm.

[0055] Optionally, the width of the extension portion 12 extending into the accommodating cavity 111 may be, but is not limited to, 50 mm, 60 mm, 70 mm, and 80 mm.

[0056] Specifically, through the above arrangement, the stability of the extension portion 12 in supporting the battery pack 20 is improved.

[0057] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The main body 11 includes a plurality of side beams 13 connected in sequence, and at least two opposite side beams 13 are connected with the extension portion 12.

[0058] Optionally, the connection between the multiple connected side beams 13 is welding. Optionally, the connection between the multiple connected side beams 13 is riveting. Optionally, the connection between the multiple connected side beams 13 is bolt and nut connection.

[0059] Optionally, the main body 11 includes four side beams 13 connected in sequence, wherein three of the side beams 13 connected in sequence are connected to the extension portion 12. Optionally, the main body 11 includes four side beams 13 connected in sequence, wherein each of the four side beams 13 connected in sequence is connected to the extension portion 12. Optionally, the main body 11 includes a first side beam, a second side beam, a third side beam, and a fourth side beam connected in sequence. Optionally, the first side beam and the third side beam are both provided with the extension portion 12. Optionally, the second side beam and the fourth side beam are both provided with the extension portion 12. Optionally, the first side beam, the second side beam, the third side beam, and the fourth side beam are all provided with the extension portion 12.

[0060] Optionally, the cross-sectional shape of the side beam 13 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the cross-sectional shape of the side beam 13 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the cross-sectional shape of the extension portion 12 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the cross-sectional shape of the extension portion 12 may specifically be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc.

[0061] Optionally, two side beams 13 opposite to each other in the length direction of the vehicle are connected to an extension portion 12. Optionally, two side beams 13 opposite to each other in the width direction of the vehicle are connected to an extension portion 12. Optionally, two side beams 13 opposite to each other in the length direction of the vehicle are connected to an extension portion 12, and two side beams 13 opposite to each other in the width direction of the vehicle are connected to an extension portion 12.

[0062] Specifically, the above arrangement improves the flexibility of the arrangement of the extension portion 12 and increases the stability of the extension portion 12 in supporting the battery pack 20 .

[0063] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The extension portion 12 and the corresponding side beam 13 have an included angle A, which satisfies: 60°≤A≤120°.

[0064] Optionally, the extension portion 12 and the corresponding side beam 13 may be integrally formed, or may be manufactured separately and later connected. Optionally, the extension portion 12 and the corresponding side beam 13 may be connected by welding. Optionally, the extension portion 12 and the corresponding side beam 13 may be connected by riveting. Optionally, the extension portion 12 and the corresponding side beam 13 may be connected by bolts and nuts.

[0065] Optionally, A can be, but is not limited to, 60°, 70°, 80°, and 120°.

[0066] Specifically, the above arrangement improves the flexibility of the arrangement between the extension portion 12 and the corresponding side beam 13 , making it easier to adjust the contact angle between the extension portion 12 and the battery pack 20 .

[0067] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The tray assembly 10 further includes a connecting beam, which connects two opposite side beams 13 and passes through the accommodating cavity 111 . An extension portion 12 is provided on one side of the connecting beam facing the side beam on which the extension portion 12 is provided.

[0068] Optionally, the connecting beam and the corresponding side beam 13 can be integrally formed, or they can be manufactured separately and connected together later. Optionally, the connecting beam and the corresponding side beam 13 are connected by welding. Optionally, the connecting beam and the corresponding side beam 13 are connected by riveting. Optionally, the connecting beam and the corresponding side beam 13 are connected by bolts and nuts. Optionally, the connecting beam and the extension portion 12 can be integrally formed, or they can be manufactured separately and connected together later. Optionally, the connecting beam and the extension portion 12 are connected by welding. Optionally, the connecting beam and the extension portion 12 are connected by riveting. Optionally, the connecting beam and the extension portion 12 are connected by bolts and nuts.

[0069] Optionally, the cross-sectional shape of the connecting beam may be polygonal, circular, elliptical, irregular, etc. Optionally, the cross-sectional shape of the connecting beam may be, but is not limited to, quadrilateral, pentagon, hexagon, octagon, circular, elliptical, irregular, etc.

[0070] Optionally, the extension portion 12 and the connecting beam have an included angle B that satisfies: 60°≤B≤120°. Specifically, B can be, but is not limited to, 60°, 70°, 80°, and 120°.

[0071] Optional, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The number of connecting beams is multiple, and the multiple connecting beams are arranged at intervals.

[0072] Optionally, the number of connecting beams may be 2 to 6, which is not limited in this embodiment.

[0073] Optionally, the plurality of connecting beams are arranged at equal intervals. Optionally, the plurality of connecting beams are arranged at equal intervals along the length direction of the vehicle.

[0074] Specifically, the above-mentioned arrangement of the connecting beam improves the stability of the extension portion 12 in supporting the battery pack 20 .

[0075] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The tray assembly 10 further includes a buffer pad 16 , which is disposed on a side of the bottom guard plate 15 facing the accommodating cavity 111 and is adapted to be opposite to the battery pack 20 .

[0076] Optionally, the buffer pad 16 includes a first buffer surface, which faces the battery pack 20. Optionally, the shape of the first buffer surface can be polygonal, circular, elliptical, and irregular, etc. Optionally, the shape of the first buffer surface can be, but is not limited to, a quadrilateral, pentagon, hexagon, octagon, circular, elliptical, and irregular, etc. Optionally, the buffer pad 16 also includes a second buffer surface, which is opposite to the first buffer surface, and the shape of the second buffer surface can be polygonal, circular, elliptical, and irregular, etc. Optionally, the shape of the second buffer surface can be, but is not limited to, a quadrilateral, pentagon, hexagon, octagon, circular, elliptical, and irregular, etc.

[0077] Optionally, the cushioning pad 16 can be filled with insulation, heat dissipation, and vibration damping materials as needed. Specifically, the bottom guard plate 15, sealing sheet or sealant, and bolt fastening ensure the overall airtightness of the tray assembly. Optionally, the thickness of the cushioning pad 16 can be adjusted based on user needs. Optionally, the cushioning pad 16 can be made of high-thermal-conductivity foam, high-thermal-insulation foam, or high-damping shock-absorbing pads.

[0078] Specifically, when the tray assembly is sealed and compressed, the bottom guard plate 15 is in close contact with the bottom of the tray, and the cushioning pad 16 is in close contact with the bottom of the battery pack 20, making the tray assembly compact, improving space utilization and sealing effect. Specifically, the above arrangement improves the sealing structure of the battery pack 20.

[0079] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A buffer protrusion is provided on one side of the bottom guard plate 15 facing the accommodating cavity 111 . The buffer protrusion is suitable for being arranged opposite to the battery pack 20 , and a filler is provided in the buffer protrusion.

[0080] Specifically, the above arrangement increases the stability of the extension portion 12 in supporting the battery pack 20 .

[0081] Optionally, the bottom guard plate 15 is a steel guard plate or other high-strength composite material guard plate. Optionally, the tray assembly 10 can be an aluminum alloy material or steel or other high-strength composite material integration.

[0082] Optional, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The bottom guard plate 15 includes a second surface 151 , and the second surface 151 is adapted to face the battery pack 20 .

[0083] Optionally, the shape of the second surface 151 may be polygonal, circular, elliptical, irregular, etc. Optionally, the shape of the second surface 151 may be, but is not limited to, quadrilateral, pentagon, hexagon, octagon, circular, elliptical, irregular, etc.

[0084] Optionally, the second surface 151 is polished. The polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the second surface 151 improves the smoothness of the second surface 151 and avoids scratching other parts.

[0085] Specifically, the above arrangement improves the sealing structure of the bottom guard plate 15 to the battery pack 20 .

[0086] The embodiment of the present invention further provides a battery device, including a battery pack 20 and the aforementioned tray assembly, wherein the battery pack 20 is disposed in the accommodating cavity 111 .

[0087] Optionally, the battery device further includes a sealing cover 21 , which is located on a side of the battery pack 20 facing away from the bottom guard plate 15 . The sealing cover 21 encloses a receiving cavity, which receives the battery pack 20 .

[0088] Optionally, after stacking the battery packs 20, glue is applied to the bottom of the tray, where the bottom guard plate 15 is located. The battery pack 20 is then placed in the tray and pressed firmly, so that the surrounding area of the battery pack 20 is bonded and fixed to the bottom of the tray assembly 10. Optionally, the bottom guard plate 15 is fastened to the tray assembly 10 using bolts, rivets, or other fastening methods until the sealing ring 17 is pressed into the tray to an appropriate thickness to meet the airtight requirements of the entire battery pack 20.

[0089] Optionally, the battery pack 20 removes the bottom plate of the tray, reducing the overall Y capacitance of the battery pack 20 and making the battery pack 20 safer during use. Specifically, by removing the bottom plate of the tray, the battery pack 20 improves the flatness of the tray and the uniformity of the glue spread on the bottom of the battery pack 20.

[0090] An embodiment of the present invention further provides an electrical device, comprising an electrical device and the aforementioned battery device, wherein the battery device is used to supply power to the electrical device.

[0091] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" is based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0092] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that implementing all or part of the processes of the above embodiment and making equivalent changes based on the present invention still fall within the scope covered by the present invention.

Claims

1. A tray assembly, characterized in that: include: A frame enclosing a receiving cavity, wherein the receiving cavity is suitable for receiving a battery pack; A bottom guard plate is connected to the frame, and the bottom guard plate closes the accommodating cavity.

2. The tray assembly according to claim 1, wherein: The four peripheral edges of the bottom guard plate are arranged opposite to and sealed with the four peripheral edges of the frame to seal the accommodating cavity.

3. The tray assembly according to claim 2, wherein: The tray assembly further includes a sealing ring, which is arranged between the bottom guard plate and the frame. The sealing ring and the four edges of the bottom guard plate facing the frame are arranged opposite to each other.

4. The tray assembly according to claim 3, wherein: Sealing grooves are provided on four sides of the bottom guard plate and / or the frame. The sealing ring is received in the sealing grooves and abuts between the frame and the bottom guard plate.

5. The tray assembly according to claim 1, wherein: The frame includes a main body and an extension portion connected to each other. The main body encloses the accommodating cavity. The extension portion extends into the accommodating cavity. The extension portion is suitable for carrying the battery pack.

6. The tray assembly according to claim 5, wherein: The width of the extension portion extending into the accommodating cavity is greater than or equal to 50 mm.

7. The tray assembly according to claim 5, wherein: The main body includes a plurality of side beams connected in sequence, and at least two opposite side beams are connected to the extension portion.

8. The tray assembly according to claim 7, wherein: The extending portion and the corresponding side beam have an included angle A that satisfies: 60°≤A≤120°.

9. The tray assembly according to claim 7, wherein: The tray assembly further includes a connecting beam connecting two opposite side beams and located in the accommodating cavity. The connecting beam is provided with the extension portion on a side facing the side beam provided with the extension portion.

10. The tray assembly according to any one of claims 1 to 9, characterized in that: The tray assembly further includes a buffer pad, which is arranged on a side of the bottom guard plate facing the accommodating cavity and is suitable for being opposite to the battery pack.

11. The tray assembly according to any one of claims 1 to 9, characterized in that: A buffer protrusion is provided on one side of the bottom guard plate facing the accommodating cavity. The buffer protrusion is suitable for being arranged opposite to the battery pack, and a filler is provided in the buffer protrusion.

12. A battery device, characterized in that: It comprises a battery pack and the tray assembly according to any one of claims 1 to 11, wherein the battery pack is arranged in the accommodating cavity.

13. The battery device according to claim 12, characterized in that The frame includes a main body and an extension portion connected to each other, the main body encloses the accommodating cavity, the extension portion extends into the accommodating cavity, the battery pack is supported by the extension portion, and the battery device also includes an adhesive layer, which is arranged between the extension portion and the battery pack, and the adhesive layer is suitable for bonding the extension portion and the battery pack.

14. The battery device according to claim 12, wherein: The battery device further includes a buffer pad, which is arranged on a side of the bottom guard plate facing the accommodating cavity and opposite to the battery pack, and a compression gap is formed between the buffer pad and the battery pack.

15. An electrical device, characterized in that: The invention comprises an electric device and a battery device as claimed in any one of claims 12 to 14, wherein the battery device is used to supply power to the electric device.

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