Battery tray, battery pack and electric equipment

Abstract

The utility model provides a battery tray, a battery pack and electric equipment, and relates to the technical field of batteries, the battery tray comprises a supporting edge beam and at least two lifting lugs, the supporting edge beam extends in a first direction, and a first groove is formed in the outer side of the supporting edge beam; the at least two lifting lugs are arranged at intervals in the first direction, at least part of the lifting lugs are inserted into the first grooves, and the lifting lugs are connected with the supporting edge beams in a welded mode. The battery tray disclosed by the utility model is relatively high in strength.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery tray, a battery pack and an electrical device. Background Art

[0002] Pure electric vehicles or hybrid electric vehicles can use battery packs as power sources. The battery packs mainly include a battery tray and multiple battery packs arranged in the battery tray. As a key component that carries the battery pack and connects the entire vehicle, the battery tray has high mechanical performance requirements.

[0003] In related technologies, a battery tray may include side beams and multiple lifting ears, wherein the side beams are hollow beams used to increase the strength of the battery tray to bear the weight of the battery pack. The lifting ears are welded to the outside of the side beams. Later, when the battery pack is installed on the chassis, the battery pack and the chassis can be connected through the lifting ears, and the battery pack can be assembled as a whole to the chassis.

[0004] However, the welding parts between the lifting lugs and the side beams are prone to cracking. Utility Model Content

[0005] Based on this, the present application provides a battery tray, a battery pack and an electrical device. The battery tray opens a first groove on the outer side of the supporting side beam to increase the force-bearing area between the supporting side beam and the lifting ear, thereby avoiding cracking of the welding part between the supporting side beam and the lifting ear, thereby solving the problem of insufficient strength of the battery tray in the related technology.

[0006] In a first aspect, the present application provides a battery tray, comprising a supporting side beam and at least two lifting ears, wherein the supporting side beam extends along a first direction and has a first groove on an outer side of the supporting side beam;

[0007] At least two lifting ears are spaced apart along the first direction, at least a portion of the structure of the lifting ear is inserted into the first groove, and the lifting ear is welded to the supporting side beam.

[0008] In a possible implementation, the battery tray of the present application further includes: a bracket, the inner side of the supporting side beam has a second groove, the bracket is connected to the second groove, and the bracket is used to abut against the battery cell.

[0009] In a possible implementation, a first beam wall is provided between the first groove and the second groove, and second beam walls are provided on both sides of the first groove along the second direction, and the wall thickness of the first beam wall is greater than the wall thickness of the second beam wall;

[0010] The second direction is arranged at an angle to the first direction.

[0011] In a possible implementation, the difference between the wall thickness of the first beam wall and the wall thickness of the second beam wall is greater than or equal to 1 mm and less than or equal to 2 mm.

[0012] In a possible implementation manner, the first groove extends along the first direction, and / or the second groove extends along the first direction.

[0013] In a possible implementation, there are at least two first grooves, and the at least two first grooves are spaced apart along the first direction, and the lifting ears are connected to the first grooves in a one-to-one correspondence.

[0014] In a possible implementation, the bracket includes a connecting portion and an abutting portion that are connected to each other, the connecting portion is connected to the second groove, and the abutting portion is used to abut against the battery cell.

[0015] In a possible implementation, the connecting portion includes an end wall and a side wall adjacent to the end wall on at least one side along the second direction, and a first angle α is formed between the side wall and the end wall;

[0016] A second angle β is formed between the inner side surface of the second groove and the inner bottom surface of the second groove, and the first angle α and the second angle β satisfy: α>β>90°.

[0017] In a possible implementation, the battery tray of the present application further includes: a bottom plate, the inner side of the supporting side beam has a connecting groove, and the bottom plate is connected to the connecting groove.

[0018] In one possible implementation, the battery tray of the present application also includes: a first connecting beam and a second connecting beam, there are two supporting side beams, the two supporting side beams are arranged at intervals, the first connecting beam and the second connecting beam are located between the two supporting side beams, and the first connecting beam and the second connecting beam are connected to the two ends of the supporting side beams.

[0019] In a possible implementation, there are at least two brackets, and the at least two brackets are spaced apart along the first direction.

[0020] In a second aspect, the present application provides a battery pack, comprising battery cells and the battery tray provided in the first aspect above, wherein the battery tray is used to carry the battery cells.

[0021] In a third aspect, the present application provides an electrical device, including an electrical device and the battery pack provided in the first aspect above, wherein the battery pack is used to supply power to the electrical device.

[0022] The present application provides a battery tray, a battery pack, and an electrical device. The battery tray includes a supporting side beam and a lifting lug. The supporting side beam includes a first groove. The supporting side beam is provided to improve the mechanical properties of the battery tray so that the battery tray can carry battery cells. The lifting lug is provided to connect the battery supporting side beam and the mounting components of the electrical device to fix the battery tray to the electrical device, and then install the battery pack on the electrical device. The first groove is provided in the supporting side beam, and part of the structure of the lifting lug extends into the first groove. On the basis of welding the lifting lug and the supporting side beam, the force-bearing area between the lifting lug and the supporting side beam is increased, and the connection strength between the lifting lug and the supporting side beam is increased, thereby preventing cracking of the welded portion between the lifting lug and the supporting side beam. Therefore, the battery tray of the present application has high strength.

[0023] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery tray, battery pack and electrical equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic diagram of the structure of a battery tray provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0027] Figure 3 Another structural schematic diagram of a battery tray provided in an embodiment of the present application;

[0028] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0029] Figure 5 A schematic diagram of the structure of the supporting side beams in the battery tray provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of the lifting ears in the battery tray provided in an embodiment of the present application;

[0031] Figure 7 for Figure 1 A partial enlarged view of point C in the middle;

[0032] Figure 8 A schematic structural diagram of the bracket in the battery tray provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100-supporting side beam; 110-first groove; 120-second groove; 130-first beam wall; 140-second beam wall; 150-connecting groove;

[0035] 200-lifting ear; 210-body; 220-sleeve;

[0036] 300-bracket; 310-connecting portion; 311-end wall; 312-side wall; 320-abutting portion;

[0037] 400-base plate;

[0038] 500-first connecting beam;

[0039] 600-Second connecting beam. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0042] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0043] The terms "first," "second," and "third" (if any) in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can, for example, be implemented in orders other than those illustrated or described herein.

[0044] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0045] In related technologies, a battery tray can include side beams and multiple lifting lugs. The side beams are hollow and serve to increase the strength of the battery tray to support the weight of the battery pack. The lifting lugs are welded to the outside of the side beams. When the battery pack is subsequently mounted on the chassis, the lifting lugs connect the battery pack and chassis, allowing the entire battery pack to be assembled to the chassis. However, the welds between the lifting lugs and the side beams are prone to cracking.

[0046] In view of the above problems, an embodiment of the present application provides a battery tray, a battery pack and an electrical device. The battery tray includes a supporting side beam and a lifting ear. A first groove is provided on the outer side of the supporting side beam. The lifting ear can be extended into the supporting side beam through the first groove. In this way, the force area between the lifting ear and the supporting side beam can be increased. Subsequently, the lifting ear and the supporting side beam are welded to prevent cracking at the welding part of the lifting ear and the supporting side beam.

[0047] The specific implementation of the battery tray, battery pack and electrical equipment provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0048] An embodiment of the present application provides an electric device, which may include an electric device and a battery pack, where the battery pack is used to supply power to the electric device.

[0049] For example, the electrical equipment may be a vehicle, the electrical device may be an electric motor, the battery pack may provide electrical energy to the electric motor, and then the vehicle may be driven by the electric motor. It should be understood that the vehicle may be a pure electric vehicle or a hybrid electric vehicle, etc., and the vehicle may be a large vehicle, a small vehicle, a special-purpose vehicle, etc., and the embodiments of the present application are not limited to this.

[0050] Reference Figure 1 As shown, based on the above embodiment, an embodiment of the present application further provides a battery pack, which may include battery cells and a battery tray, and the battery tray is used to carry the battery cells.

[0051] It is understandable that a single battery cell can only provide a smaller voltage and a shorter battery life. For electrical devices that require a higher voltage, multiple battery cells need to be integrated. Therefore, multiple battery cells can be connected in series, and the battery tray is used to carry the battery cells, and then the multiple battery cells are assembled to form a battery pack with a higher voltage and longer battery life.

[0052] When installing the battery pack on an electrical device, the battery tray serves as an intermediate connecting component. For example, when the electrical device is a vehicle, the vehicle may include a chassis, an electric motor and a battery pack. Both the electric motor and the battery pack may be installed on the chassis. The battery pack may provide electrical energy to the electric motor. The battery pack may be welded to the chassis through the battery tray, thereby fixing the battery pack to the chassis.

[0053] Reference Figures 1 to 6 As shown, based on the above embodiment, the embodiment of the present application further provides a battery tray, the battery tray includes a supporting side beam 100 and at least two lifting ears 200, the supporting side beam 100 is along a first direction (the first direction can be referred to as Figure 1 The support side beam 100 extends in the X direction. The outer side of the support side beam 100 has a first groove 110. At least two lifting ears 200 are spaced apart along the first direction. At least a portion of the lifting ears 200 is inserted into the first groove 110. The lifting ears 200 are welded to the support side beam 100.

[0054] In the present application, the supporting side beam 100 has greater strength and rigidity. The battery tray can improve the overall strength, overall rigidity and overall stability of the battery tray by setting one or more supporting side beams 100, thereby improving the mechanical properties of the battery tray. The lifting lug 200 is used to connect the battery tray and the mounting components of the electrical equipment. For example, the lifting lug 200 is used to connect the battery tray and the chassis of the vehicle.

[0055] Among them, the lifting ear 200 and the supporting side beam 100 can be welded together. In order to improve the connection strength between the lifting ear 200 and the supporting side beam 100 and to prevent the welding part of the lifting ear 200 and the supporting side beam 100 from cracking during the use of the battery pack, a first groove 110 is opened on the outer side of the supporting side beam 100 of this embodiment. Before each lifting ear 200 is welded to the supporting side beam 100, each lifting ear 200 can first be inserted into the first groove 110 through the notch of the first groove 110, thereby making part of the structure of each lifting ear 200 extend into the supporting side beam 100. In this way, each lifting ear 200 and the supporting side beam 100 can be welded together subsequently. After the beam 100 is welded, the bottom surface of the first groove 110 and the side surface of the first groove 110 are in contact with the outer surface of each lifting ear 200, thereby increasing the force area between each lifting ear 200 and the supporting side beam 100. When the supporting side beam 100 is subjected to a force in the Z direction, the force can be transmitted through the weld between the supporting side beam 100 and the lifting ear 200, and part of the force can be converted into the extrusion force of the lifting ear 200 and the first groove 110 to offset it, thereby increasing the connection strength between each lifting ear 200 and the supporting side beam 100, thereby preventing the welding part of each lifting ear 200 and the supporting side beam 100 from cracking.

[0056] It should be noted that when the lifting lug 200 extends into the first groove 110, the lifting lug 200 and the groove opening of the first groove 110 are welded together, and the lifting lug 200 and the groove bottom of the first groove 110 are welded together, so that the circumference of each lifting lug 200 is welded to the supporting side beam 100, thereby improving the welding strength between the lifting lug 200 and the supporting side beam 100.

[0057] Reference Figure 6 As shown, specifically, the lifting eye 200 may include a body 210 and a sleeve 220 that are connected to each other, the body 210 is used to be welded to the supporting edge beam 100, and the sleeve 220 is used to be welded to the installation component of the electrical equipment.

[0058] The battery tray provided in the embodiment of the present application includes a support side beam 100 and a lifting lug 200. The support side beam 100 includes a first groove 110. The support side beam 100 is provided to improve the mechanical properties of the battery tray so that the battery tray can carry battery cells. The lifting lug 200 is provided to connect the battery support side beam 100 and the mounting components of the electrical equipment to fix the battery tray to the electrical equipment, and then install the battery pack on the electrical equipment. The first groove 110 is provided on the support side beam 100, and a part of the structure of the lifting lug 200 is extended into the first groove 110. On the basis of welding the lifting lug 200 and the support side beam 100, the force bearing area between the lifting lug 200 and the support side beam 100 is increased, thereby improving the connection strength between the lifting lug 200 and the support side beam 100, thereby preventing cracking of the welded portion between the lifting lug 200 and the support side beam 100. Therefore, the battery tray in the embodiment of the present application has high strength.

[0059] Reference Figure 4 、 Figure 5 、 Figure 7 As shown, in a possible implementation, the battery tray of the present application further includes a bracket 300, and the inner side of the supporting side beam 100 has a second groove 120, the bracket 300 is connected to the second groove 120, and the bracket 300 is used to abut against the battery cell.

[0060] In this way, by opening a second groove 120 on the inner side of the supporting side beam 100, the internal space of the battery tray can be increased. The second groove 120 can be used to connect the bracket 300. In addition, the second groove 120 can also serve as an exhaust channel for the battery cells. When the battery cells in the battery tray thermally run away, the gas generated by the heat can be discharged from the battery tray along the second groove 120, thereby improving the safety of the battery pack.

[0061] In addition, the battery pack may further include various wiring harnesses, which may also be arranged in the second groove 120 , thereby improving the space utilization of the battery tray.

[0062] The bracket 300 is used to abut against the battery cell. The bracket 300 can apply a pre-tightening force to the battery cell. Moreover, when the battery cell expands, the bracket 300 can be deformed to provide expansion space for the battery cell.

[0063] Reference Figure 5 As shown, in some embodiments, the first groove 110 and the second groove 120 are back-to-back in the Z direction and at least partially overlap, a first beam wall 130 is provided between the first groove 110 and the second groove 120, and second beam walls 140 are provided on both sides of the first groove 110 along the second direction, and the wall thickness of the first beam wall 130 is greater than the wall thickness of the second beam wall 140.

[0064] The second direction is set at an angle to the first direction. Figure 1 、 Figure 5 and Figure 8 in the Y direction.

[0065] It should be noted that the forces acting on the battery pack mainly include the gravity of the battery cells and the supporting force of the mounting components of the electrical equipment on the battery pack. These forces mainly act on the first beam wall 130. Therefore, the first beam wall 130 needs to be set thicker to improve the mechanical properties of the first beam wall 130. The second beam wall 140 is subjected to less force, and the first beam wall 130 can be set thinner to reduce the weight and cost of the supporting side beam 100.

[0066] In some embodiments, the difference between the wall thickness of the first beam wall 130 and the wall thickness of the second beam wall 140 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0067] That is, the wall thickness of the first beam wall 130 needs to be increased by 1 mm to 2 mm based on the wall thickness of the second beam wall 140 to ensure the strength of the first beam wall 130 and make the supporting edge beam 100 lighter.

[0068] For example, the wall thickness of the second beam wall 140 may be 2 mm to 4 mm, and correspondingly, the wall thickness of the first beam wall 130 may be 3 mm to 6 mm.

[0069] In some embodiments, the first groove 110 extends along the first direction, and / or the second groove 120 extends along the first direction.

[0070] That is, the first groove 110 may extend along the first direction, the second groove 120 may extend along the first direction, or both the first groove 110 and the second groove 120 may extend along the first direction.

[0071] It is worth noting that the support side beam 100 can be formed by extrusion or roll forming using aluminum or stainless steel as raw materials. This allows the first groove 110 and the second groove 120 to be formed during the forming process, thereby improving processing efficiency. In the support side beam 100 formed in this way, the first groove 110 and the second groove 120 both extend along the first direction. The multiple ears 200 can be arranged at different positions along the first direction of the first groove 110 according to installation requirements, without having to redesign the position of the first groove 110 according to the installation requirements of different electrical equipment, thereby facilitating the standardization of battery trays. In addition, the extension of the second groove 120 along the first direction facilitates the formation of an exhaust channel and the arrangement of wiring harnesses.

[0072] In other embodiments, there are at least two first grooves 110 , and the at least two first grooves 110 are spaced apart along the first direction, and the ears 200 are connected to the first grooves 110 in a one-to-one correspondence.

[0073] In the above-mentioned setting method, after the main body of the supporting side beam 100 is processed and formed, the first groove 110 is formed by milling. At this time, multiple first grooves 110 are arranged at intervals along the first direction, and one lifting ear 200 is correspondingly extended into one first groove 110, so that each lifting ear 200 can be extended into the supporting side beam 100.

[0074] Reference Figure 8 As shown, in a possible implementation, the bracket 300 includes a connecting portion 310 and an abutting portion 320 that are connected to each other, the connecting portion 310 is connected to the second groove 120, and the abutting portion 320 is used to abut against the battery cell.

[0075] In this way, the bracket 300 can be connected to the second groove 120 through the connecting portion 310, thereby fixing the bracket 300 to the supporting side beam 100, and the bracket 300 can abut against the battery cell through the abutting portion 320, thereby allowing the abutting portion 320 to apply a pre-tightening force to the battery cell, and when the battery cell expands, at least one of the abutting portion 320 and the connecting portion 310 can be deformed to provide space for the battery cell to expand.

[0076] Reference Figure 5 and Figure 8 As shown, in one possible implementation, the connecting portion 310 includes an end wall 311 and a side wall 312 adjacent to the end wall 311 on at least one side along the second direction. A first angle α is formed between the side wall 312 and the end wall 311. A second angle β is formed between the inner side surface of the second groove 120 and the inner bottom surface of the second groove 120. The first angle α and the second angle β satisfy the following: α>β>90°.

[0077] That is to say, the cross-sectional shape of the connecting portion 310 and the second groove 120 can both be trapezoidal. Since the first angle α is greater than the second angle β, when the connecting portion 310 is connected to the second groove 120, there is a gap between the end wall 311 of the connecting portion 310 and the inner bottom surface of the second groove 120. The gap reserves space for the deformation of the connecting portion 310. When the abutting portion 320 is subjected to the expansion force of the battery cell, the expansion force can be transmitted to the connecting portion 310, thereby squeezing the connecting portion 310, and causing the connecting portion 310 to move toward the inner bottom surface of the second groove 120, thereby causing the connecting portion 310 to deform, thereby providing space for the battery cell to expand.

[0078] Reference Figure 1 and Figure 4 As shown, in a possible implementation, the battery tray of the present application further includes a bottom plate 400 , and the inner side of the supporting side beam 100 has a connecting groove 150 , and the bottom plate 400 is connected to the connecting groove 150 .

[0079] For example, the beam wall connecting the support side beam 100 and the bottom plate 400 can be thinned to form a connection groove 150, thereby facilitating the connection between the bottom plate 400 and the support side beam 100. After the two are connected, the outer surface of the support side beam 100 can be flush with the outer surface of the bottom plate 400, thereby improving the flatness of the bottom of the battery tray.

[0080] The first groove 110, the second groove 120 and the connecting groove 150 are sequentially arranged along the third direction. Figure 1 and Figure 5 The Z direction in .

[0081] Reference Figure 1As shown, in a possible implementation, the battery tray of the present application also includes a first connecting beam 500 and a second connecting beam 600, there are two supporting side beams 100, the two supporting side beams 100 are arranged at intervals, the first connecting beam 500 and the second connecting beam 600 are located between the two supporting side beams 100, and the first connecting beam 500 and the second connecting beam 600 are connected to the two ends of the supporting side beam 100.

[0082] In this way, the first connecting beam 500, the supporting side beam 100, the second connecting beam 600 and the supporting side beam 100 are connected end to end in sequence to form a quadrilateral frame, and the bottom plate 400 is located in the frame, thereby forming the main structure of the battery tray together.

[0083] In some embodiments, there are at least two brackets 300 , and the at least two brackets 300 are spaced apart along the first direction.

[0084] It is understandable that the multiple battery cells can be arranged along the first direction, and multiple brackets 300 are provided to respectively abut against different battery cells, so that the multiple brackets 300 respectively provide pre-tightening force for the multiple battery cells.

[0085] Alternatively, the multiple battery cells may be arranged along the third direction, and the multiple brackets 300 may abut against different parts of the same battery cell, so that the multiple brackets 300 respectively provide pre-tightening force for different parts of one battery cell.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery tray, characterized in that: include: A supporting side beam (100), the supporting side beam (100) extending along a first direction, the outer side of the supporting side beam (100) having a first groove (110); At least two lifting ears (200), at least two of the lifting ears (200) are spaced apart along the first direction, at least a portion of the structure of the lifting ears (200) is inserted into the first groove (110), and the lifting ears (200) are welded to the supporting side beam (100).

2. The battery tray according to claim 1, wherein: Also includes: The bracket (300) has a second groove (120) on the inner side of the supporting side beam (100), the bracket (300) is connected to the second groove (120), and the bracket (300) is used to abut against the battery cell.

3. The battery tray according to claim 2, characterized in that: A first beam wall (130) is provided between the first groove (110) and the second groove (120), and second beam walls (140) are provided on both sides of the first groove (110) along the second direction, and the wall thickness of the first beam wall (130) is greater than the wall thickness of the second beam wall (140); The second direction is arranged at an angle to the first direction.

4. The battery tray according to claim 3, characterized in that: The difference between the wall thickness of the first beam wall (130) and the wall thickness of the second beam wall (140) is greater than or equal to 1 mm and less than or equal to 2 mm.

5. The battery tray according to any one of claims 2 to 4, characterized in that: The first groove (110) extends along the first direction, and / or the second groove (120) extends along the first direction.

6. The battery tray according to any one of claims 1 to 4, characterized in that: There are at least two first grooves (110), and the at least two first grooves (110) are spaced apart along the first direction. The lifting ears (200) are connected to the first grooves (110) in a one-to-one correspondence.

7. The battery tray according to claim 3 or 4, characterized in that: The bracket (300) comprises a connecting portion (310) and an abutting portion (320) connected to each other, the connecting portion (310) being connected to the second groove (120), and the abutting portion (320) being used to abut against the battery core.

8. The battery tray according to claim 7, characterized in that: The connecting portion (310) comprises an end wall (311), and a side wall (312) adjacent to the end wall (311) on at least one side along the second direction, wherein a first angle α is formed between the side wall (312) and the end wall (311); A second angle β is formed between the inner side surface of the second groove (120) and the inner bottom surface of the second groove (120), and the first angle α and the second angle β satisfy: α>β>90°.

9. The battery tray according to any one of claims 1 to 4, characterized in that: Also includes: The bottom plate (400) has a connection groove (150) on the inner side of the supporting side beam (100), and the bottom plate (400) is connected to the connection groove (150).

10. The battery tray according to claim 9, characterized in that: Also includes: A first connecting beam (500) and a second connecting beam (600), two supporting side beams (100), the two supporting side beams (100) are arranged at intervals, the first connecting beam (500) and the second connecting beam (600) are located between the two supporting side beams (100), and the first connecting beam (500) and the second connecting beam (600) are connected to both ends of the supporting side beam (100).

11. The battery tray according to any one of claims 2 to 4, characterized in that: There are at least two brackets (300), and at least two brackets (300) are spaced apart along the first direction.

12. A battery pack, characterized in that: The battery tray comprises a battery cell and a battery tray as claimed in any one of claims 1 to 11, wherein the battery tray is used to carry the battery cell.

13. An electrical device, characterized in that: The device comprises an electric device and a battery pack as claimed in claim 12, wherein the battery pack is used to supply power to the electric device.

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