Tray frame, tray, battery pack and electric equipment

Abstract

The embodiment of the invention provides a tray frame, a tray, a battery pack and electric equipment, and relates to the technical field of battery packs, the tray frame comprises a first edge beam, the first edge beam comprises a first edge beam main body, an anti-collision part and at least two first connecting pieces, and the anti-collision part and the first edge beam main body are the same in extension direction; the anti-collision part is fixed to one side of the first boundary beam body through a first connecting piece, a gap is formed between at least part of the area of the anti-collision part and the first boundary beam body, a plurality of lifting lug modules are arranged on the anti-collision part, and the lifting lug modules are sequentially arranged in the extending direction of the anti-collision part. Therefore, a certain crumple space is formed between the anti-collision part and the first boundary beam main body through the gap, so that the anti-collision part has a better energy absorption effect under the conditions of side column collision and the like, and a better protection effect on a battery module mounted in the tray is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a pallet frame, a pallet, a battery pack and electrical equipment. Background Art

[0002] The power battery pack is a key component used to store and provide electrical energy in electric vehicles, hybrid vehicles, power tools and other electric devices. The power battery pack generally includes structures such as battery modules, trays and cover plates. Among them, the tray mainly includes a bottom plate and a frame. The frame is fixed to the bottom plate to enclose a cavity on the bottom plate. The cover plate is connected to the frame to seal the cavity, thereby protecting the battery module located in the cavity.

[0003] In addition, the frame also includes a side beam with a hanging ear module welded thereto, and the side beam can be connected to the device using the battery pack through the welded hanging ear module. The hanging ear module is generally welded directly to the outside of the side beam. During use, once the hanging ear module side is squeezed, the side beam will be deformed, squeezing the internal battery module and damaging the battery module. Summary of the invention

[0004] The embodiments of the present application provide a tray frame, a tray, a battery pack and an electrical device to reduce the probability of damage to the battery module due to the deformation of the side beam squeezing the battery module.

[0005] In a first aspect, an embodiment of the present application provides a pallet frame, comprising a first side beam, wherein the first side beam comprises a first side beam body, an anti-collision portion and at least two first connecting members, wherein the anti-collision portion has the same extension direction as the first side beam body, the anti-collision portion is fixed to one side of the first side beam body by the first connecting member, and there is a gap between at least a partial area of ​​the anti-collision portion and the first side beam body, and a plurality of lifting ear modules are provided on the anti-collision portion, and the lifting ear modules are arranged sequentially along the extension direction of the anti-collision portion.

[0006] In some possible implementations, the lifting ear module and the first side beam are integrally die-cast.

[0007] In some possible implementations, a supporting portion is disposed at one end of the first connecting member, and the supporting portion extends to below the anti-collision portion and is connected to the anti-collision portion.

[0008] In some possible implementations, a limiting portion is further provided on the first connecting member, and the limiting portion is connected to a side of the anti-collision portion away from the supporting portion.

[0009] In some possible implementations, a slope is provided on a side of the supporting portion facing away from the first side beam body.

[0010] In some possible implementations, the first side beam further includes a second connecting member connected to the first side beam body, and an end of the first connecting member facing away from the supporting portion is connected to the second connecting member.

[0011] In some possible implementations, a distance between a side of the second connecting member facing away from the first side beam body and the first side beam body is less than or equal to a width of the gap.

[0012] In some possible implementations, at least one first connecting member is disposed on both sides of each of the ear modules, and the angle between the first connecting member and the anti-collision portion is 0°-60°.

[0013] In some possible implementations, the lifting ear module includes a first lifting ear sleeve, the first lifting ear sleeve is provided with a first through hole, and the first lifting ear sleeve is inserted into the anti-collision portion.

[0014] In some possible embodiments, the ear module also includes at least two first ear reinforcement ribs arranged on the outside of the first ear sleeve, the first ear reinforcement ribs are located on the side of the anti-collision part away from the second connecting member, the supporting part adjacent to the ear module is connected to at least one of the first ear reinforcement ribs, and the first ear reinforcement rib is also connected to the anti-collision part.

[0015] In some possible implementations, the anti-collision portion includes a second connecting plate and a reinforcement portion, wherein the reinforcement portion is disposed on a side of the second connecting plate away from the second connecting member, and the reinforcement portion is located between two adjacent lifting ear modules.

[0016] In some possible embodiments, the reinforcement portion includes a third connecting plate and two fourth connecting plates, the extension direction of the third connecting plate is the same as the extension direction of the second connecting plate, the two ends of the third connecting plate are correspondingly connected to the supporting portions, and the third connecting plate is connected to the side of the second connecting plate away from the first side beam body, one end of the two fourth connecting plates is connected to the third connecting plate, and the other ends are respectively connected to the two supporting portions.

[0017] In some possible implementations, the two fourth connecting plates are arranged opposite to each other, and an angle between the two fourth connecting plates is 60-150°.

[0018] In some possible embodiments, the second side beam and the middle cross beam are integrally formed with the first side beam, two of the first side beam and two of the second side beam are provided, the two first side beams are arranged opposite to each other, the two second side beams are respectively provided at the two ends of the first side beam, and the two ends of the second side beam are correspondingly connected to the ends of the two first side beams, at least one middle cross beam is provided, the two ends of the middle cross beam are respectively connected to the two first side beams, and at least one cross beam hanging ear is provided on the middle cross beam.

[0019] In some possible implementations, a mounting portion is provided on the second side beam, the mounting portion is located on a side of the two second side beams facing away from each other, and at least one lifting ear hole is provided on the mounting portion, and the lifting ear hole passes through the mounting portion.

[0020] In some possible embodiments, the intermediate cross beam includes a first main rib, a second main rib and at least two secondary ribs extending in the same direction, the first main rib and the second main rib are arranged opposite to each other, one side of the secondary rib is connected to the first main rib, and the other side is connected to the second main rib, the cross beam ear is arranged between adjacent secondary ribs, and the first main rib, the second main rib and the secondary rib are all connected to the cross beam ear.

[0021] In some possible embodiments, the crossbeam lifting ear includes a second lifting ear sleeve and at least four second lifting ear reinforcement ribs arranged on the second lifting ear sleeve, the second lifting ear sleeve is provided with a second through hole, and among the four second lifting ear reinforcement ribs, one is connected to the first main rib, one is connected to the second main rib, and the other two are respectively connected to the secondary ribs located on both sides of the second lifting ear sleeve.

[0022] In some possible embodiments, a third lifting ear sleeve is further provided below the crossbeam lifting ear, the third lifting ear sleeve is respectively connected to the first main rib plate and the second main rib plate, the third lifting ear sleeve is provided with a third through hole coaxial with the second through hole, and the inner diameter of the third through hole is larger than the inner diameter of the second through hole.

[0023] In some possible embodiments, the first main rib and the second main rib are provided with avoidance notches that match each other, and at least one avoidance notch is provided in the middle and at both ends of the first main rib or the second main rib, and the shape of the secondary rib is adapted to the shape of the first main rib and the second main rib.

[0024] In some possible embodiments, a connecting platform is provided at one end of the first main rib and the second main rib facing away from the secondary rib, and the connecting platform is located on the side of the first main rib and the second main rib facing away from each other, and the connecting platform is respectively used to connect to a pallet bottom plate of the pallet.

[0025] In a second aspect, an embodiment of the present application further provides a pallet, comprising a pallet bottom plate and a pallet frame as described in any one of the first aspects, wherein the pallet frame is connected to the pallet bottom plate.

[0026] In a third aspect, an embodiment of the present application further provides a battery pack, comprising a battery pack main body and the tray described in the second aspect, wherein the tray is connected to the battery pack main body.

[0027] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising a device body and the battery pack described in the third aspect, wherein the battery pack is fixed on the device body.

[0028] In the pallet frame, pallet, battery pack and electrical equipment provided in the embodiments of the present application, the first side beam of the pallet frame includes a first side beam body, an anti-collision portion and a first connecting member, and the ear module is arranged on the anti-collision portion, and the anti-collision portion is connected to the first side beam body through the first connecting member, and a gap is provided between at least a partial area of ​​the anti-collision portion and the first side beam body, so that there is a certain collapse space between the anti-collision portion and the first side beam body, so that the anti-collision portion has a better energy absorption effect when a side column collision occurs, etc., and the probability of deformation of the first side beam body is reduced, thereby better protecting the battery module installed in the pallet and reducing the probability of damage to the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 A schematic diagram of the structure of a tray provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of a first side beam in a pallet frame provided in an embodiment of the present application;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of the structure within the circle in FIG.

[0033] Figure 4 for Figure 2 A front view of the first side beam in FIG.

[0034] Figure 5 for Figure 4 AA section view in;

[0035] Figure 6 for Figure 2 A top view of a first side beam in a pallet frame;

[0036] Figure 7 for Figure 6 An enlarged schematic diagram of the structure within the circle in FIG.

[0037] Figure 8 for Figure 1 An enlarged schematic diagram of the structure within the circle in FIG.

[0038] Fig. 9 A top view of the middle crossbeam of the pallet frame provided in an embodiment of the present application;

[0039] Fig.10 for Fig. 9 BB section diagram in;

[0040] Fig.11 for Fig. 9 An enlarged schematic diagram of the structure within the circle in FIG.

[0041] Fig.12 for Fig. 9 A front view of the middle crossbeam in FIG.

[0042] Fig.13 for Fig.12 CC profile in ;

[0043] Fig.14 for Figure 1 Schematic diagram of the connection structure between the middle crossbeam and the bottom plate of the pallet;

[0044] Fig.15 for Fig.14 DD cross-section diagram in.

[0045] Reference numerals:

[0046] 100-first side beam; 110-first side beam body; 120-anti-collision part; 121-second connecting plate; 122-third connecting plate; 123-fourth connecting plate; 130-first connecting member; 131-supporting part; 132-limiting part; 133-inclined surface; 140-second connecting member; 141-first mounting hole; 142-first sealing groove;

[0047] 200-lifting ear module; 210-first lifting ear sleeve; 211-first through hole; 220-first lifting ear reinforcement rib;

[0048] 300 - second side beam; 310 - hanging ear hole; 320 - mounting portion;

[0049] 400-middle crossbeam; 410-first main rib; 420-second main rib; 430-secondary rib; 440-crossbeam lifting ear; 441-second lifting ear sleeve; 442-second through hole; 443-second lifting ear reinforcement rib; 450-third lifting ear sleeve; 451-third through hole; 460-connecting platform; 470-avoidance gap; 480-crossbeam reinforcement rib;

[0050] 500-Pallet bottom plate.

[0051] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0053] The power battery pack is one of the core components commonly used in electric vehicles, hybrid vehicles and other electric devices. It is mainly composed of battery modules, management system (BMS, Battery Management System), cooling system, tray and cover.

[0054] A pallet is generally composed of multiple components, such as a pallet bottom plate, side beams, middle cross beams, lifting ear modules, reinforcement structures, etc., which are assembled by welding or riveting. However, there are many components that make up a pallet, and welding or riveting them one by one requires a lot of manpower and material resources. As a result, when mass-producing pallets, not only is the cost high, but it is also difficult to effectively control product quality.

[0055] At the same time, the pallet frame is mainly composed of side beams, middle beams, and ear modules. When assembling the pallet frame, multiple side beams are generally welded together to form a frame that is wrapped around the bottom plate of the pallet, and then the middle beam is welded to the frame, and the ear modules are directly welded to the outside of the side beams.

[0056] With such a structure, if a side column collision occurs on the side of the ear module during use, the side beam may be easily deformed due to squeezing. The deformation of the side beam will press on the battery module located inside the frame, thereby damaging the battery module.

[0057] In order to avoid the above-mentioned problems, the embodiments of the present application provide a pallet frame, a pallet, a battery pack and an electrical equipment, and the first side beam structure of the pallet frame is optimized. There is a gap between the anti-collision portion of the first side beam and the first side beam body, which can effectively reduce the probability of damage to the battery module when a side column collision occurs. At the same time, the pallet frame can be formed in one piece, and the processing technology is simple. It also achieves optimization of the mechanical properties and lightweight of the pallet, effectively reducing the cost of the pallet, and has obvious cost advantages in mass production. In addition, the connection and disassembly of the pallet and the electrical equipment are convenient, which improves the convenience of maintenance.

[0058] It can be understood that the tray frame, tray and battery pack provided in the embodiments of the present application can be used not only in electric vehicles and hybrid vehicles, but also in other equipment that requires the use of battery packs, and the embodiments of the present application are not limited thereto.

[0059] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0060] In some embodiments, see Figure 1 As shown, the tray includes a tray frame and a tray bottom plate 500 , wherein the tray frame is arranged around the circumference of the tray bottom plate 500 to form a receiving cavity for placing the battery module between the tray bottom plate 500 and the tray frame.

[0061] The pallet frame may include a first side beam 100 and a second side beam 300, wherein the first side beam 100 and the second side beam 300 are each provided in two numbers, the two first side beams 100 are provided opposite to each other, the two second side beams 300 are provided at both ends of the first side beam 100, and the two ends of the second side beam 300 are correspondingly connected to the ends of the two first side beams 100.

[0062] The first side beam 100 and the second side beam 300 may be integrally formed or separately formed and then connected, and the upper surface of the tray bottom plate 500 may be connected to the bottom of the first side beam 100 and the second side beam 300 .

[0063] In some embodiments, see Figure 1 , Figure 2 and Figure 3As shown, the first side beam 100 includes a first side beam body 110, an anti-collision portion 120 and at least two first connecting members 130. The anti-collision portion 120 extends in the same direction as the first side beam body 110, and the anti-collision portion 120 is fixed to one side of the first side beam body 110 through the first connecting member 130, that is, it is located on the side of the first side beam body 110 away from the accommodating cavity. There is a gap between at least a part of the anti-collision portion 120 and the first side beam body 110, that is, at least a part of the anti-collision portion 120 does not contact the first side beam body 110.

[0064] Exemplarily, the anti-collision portion 120 may not be connected to the first side beam body 110 as a whole, but may be directly connected to the first connecting member 130 , and may be completely connected to the first side beam body 110 through the first connecting member 130 .

[0065] For example, the anti-collision portion 120 may be connected to the ends of the first side beam body 110 at both ends, while the middle portion is only connected to the first side beam body 110 through the first connecting member 130 .

[0066] It is understandable that this is only an example for illustration and not a limitation. As long as there is a gap between at least a portion of the first side beam body 110 and the anti-collision portion 120, the battery module can be protected.

[0067] Of course, the number of the first connecting members 130 and the distance between adjacent first connecting members 130 can also be designed according to the support requirements of the anti-collision portion 120 , which is not limited in this embodiment.

[0068] At the same time, a plurality of lifting ear modules 200 are provided on the anti-collision part 120 . The lifting ear modules 200 are arranged in sequence along the extension direction of the anti-collision part 120 , and can be connected to electrical equipment, such as a vehicle frame, through the lifting ear modules 200 .

[0069] The distance between adjacent hanging ear modules 200 may be adaptively adjusted according to the installation conditions of the tray and the electrical equipment, and this embodiment does not limit this.

[0070] Of course, the number of the ear modules 200 is also the same and can be adjusted according to actual conditions, and can be two, three or more, which is not limited in this embodiment.

[0071] Specifically, the anti-collision portion 120 protrudes outward from the outer side of the first side beam body 110, and the ear module 200 is arranged on the anti-collision portion 120. When the battery pack collides with a side pole, the gap can be used as a collapse space between the anti-collision portion 120 and the first side beam body 110, thereby reducing the probability of the first side beam body 110 being deformed and concave due to the side pole collision, thereby providing better protection for the battery module.

[0072] In some embodiments, the first side beam 100 and the ear module 200 can be integrally formed by die casting, that is, the first side beam body 110, the anti-collision part 120, the connecting piece and the ear module 200 are integrally formed. Die casting is a metal forming process, which uses high pressure to inject molten metal into a mold cavity, and demolds the desired parts after cooling. It is a processing method well known to those skilled in the art, and will not be described in detail in this embodiment.

[0073] The first side beam 100 and the lifting ear module 200 are integrally formed, which can save multiple complex processes such as welding and riveting, improve the convenience of pallet processing, and at the same time improve the consistency of the structural strength of different positions of the first side beam 100.

[0074] In some embodiments, see Figure 4 and Figure 5 As shown, a supporting portion 131 is disposed at one end of the first connecting member 130 , and the supporting portion 131 extends to the bottom of the anti-collision portion 120 and is connected to the anti-collision portion 120 .

[0075] After the supporting portion 131 is provided on the first connecting member 130 , the connecting strength between the first connecting member 130 and the anti-collision portion 120 can be strengthened by the supporting portion 131 , so that after the hanging ear module 200 is connected to the electrical equipment, the transmission load can be effectively dispersed.

[0076] In some embodiments, a limiting portion 132 is further disposed on the first connecting member 130 , and the limiting portion 132 is connected to a side of the anti-collision portion 120 away from the supporting portion 131 .

[0077] Specifically, the first connecting member 130 can be set as a first connecting plate, of which two opposite side walls, one is attached to and connected to the first side beam body 110, and the other side wall has a limiting portion 132 and a supporting portion 131, and the anti-collision portion 120 is stuck between the limiting portion 132 and the supporting portion 131, and at the same time, one side wall of the anti-collision portion 120 is connected to the side of the first connecting plate close to the anti-collision portion 120, so that the position of the anti-collision portion 120 is limited by the supporting portion 131 and the limiting portion 132, and the supporting portion 131 and the limiting portion 132 are used to assist in transmitting the load, thereby improving the anti-deformation ability.

[0078] In some embodiments, see Figure 5 As shown, a slope 133 is provided on the side of the supporting portion 131 away from the first side beam body 110 , that is, a draft angle is provided on the end of the supporting portion 131 away from the first side beam body 110 , thereby forming the slope 133 .

[0079] Specifically, the upper surface of the supporting portion 131 facing away from the first side beam body 110 can be flush with the end of the anti-collision portion 120, so that the supporting portion 131 effectively contacts the anti-collision portion 120. The projection of the lower surface of the supporting portion 131 in the vertical direction is located inside the upper surface of the supporting portion 131, so that an inclined surface 133 is formed at the end of the supporting portion 131.

[0080] The angle between the inclined surface 133 and the horizontal plane can be 30°-60°. In production, after multiple topology optimization simulation experiments, it is found that this angle not only does not affect the strength of the first side beam 100, but also can better assist in achieving the lightweight goal.

[0081] That is, after the inclined surface 133 is provided, demoulding is facilitated on the one hand, and on the other hand, it helps to reduce the weight of the first side beam 100 and assists in achieving a lightweight design.

[0082] In some embodiments, see Figure 5 As shown, the first side beam 100 further includes a second connecting member 140 connected to the first side beam body 110, and the end of the first connecting member 130 away from the supporting portion 131 is connected to the second connecting member 140. That is, the second connecting member 140 is located at the upper part of the first side beam body 110, and is connected to the side of the first side beam body 110 away from the accommodating cavity, and the top of the first connecting member 130 is connected to the second connecting member 140. The first connecting member 130 and the second connecting member 140 are used as the force transmission path during the Z-direction vibration process, so that the first side beam 100 has good Z-direction stiffness, which helps to improve the Z-direction modal frequency of the battery pack.

[0083] In some embodiments, see Figure 5 As shown, the distance between the second connecting member 140 and the first side beam body 110 and the side facing away from the first side beam body 110 is less than or equal to the width of the gap.

[0084] That is, the width of the second connecting member 140 in the X direction is less than or equal to the minimum distance between the first side beam body 110 and the anti-collision part 120, so that the projection of the second connecting member 140 in the Z direction does not overlap with the anti-collision part 120 at all. When the first side beam 100 and the hanging ear module 200 are integrally formed, the mold can be directly demolded by moving the mold in the positive and negative directions of the Z direction, which improves the convenience of processing the first side beam 100 and the hanging ear module 200, and can also effectively reduce the mold design and processing costs, improve the die-casting efficiency, and reduce the cost of mass production of the first side beam 100.

[0085] In some embodiments, Figure 5As shown, the ear module 200 includes a first ear sleeve 210, and a first through hole 211 is arranged on the first ear sleeve 210. The first ear sleeve 210 is inserted into the anti-collision part 120, that is, the first ear sleeve 210 passes through the anti-collision part 120, and the ear module 200 can be directly connected to the electrical equipment by inserting a bolt into the first through hole 211.

[0086] The first through hole 211 extends along the Z direction, and there is no obstruction above and below the first through hole 211, which is not only convenient for demoulding. In addition, the first lifting ear sleeve 210 can be placed below the connection part of the electrical equipment, and the bolts can be inserted into the first through hole 211 from below to lock the first lifting ear sleeve 210 and the electrical equipment. In traditional trays, bolts are generally inserted from top to bottom. For example, when using it in a car, when disassembling the battery pack, it is necessary to first disassemble the seats, the floor inside the car and other structures above the battery pack. Disassembly and installation are extremely troublesome. In this example, the lifting ear module 200 and the frame can be directly connected from the bottom, making it more convenient to disassemble and assemble the battery pack, thereby improving maintenance efficiency.

[0087] In addition, the first hanging ear sleeve 210 can also be extended to the outside of the anti-collision portion 120 toward the second connecting member 140 , so as to facilitate fine processing of the contact side of the first hanging ear sleeve 210 with the vehicle frame.

[0088] In some embodiments, see Figure 6 and Figure 7 As shown, at least one first connecting member 130 is disposed on both sides of each ear module 200 , and the ear module 200 is respectively connected to the first connecting members 130 adjacent to both sides, so that the load received by the ear module 200 can be dispersed and transmitted through the anti-collision part 120 and the first connecting member 130 .

[0089] Among them, the angle between the first connecting member 130 and the anti-collision part 120 can be set to 0°-60°. Through production tests, it is found that within this angle range, the first connecting member 130 can serve as an effective force transmission path between the ear module 200 and the first side beam body 110, especially in the vibration condition of the battery pack. The above-mentioned ribs have good Z-direction stiffness, simple structure, and obvious lightweight effect. The battery pack designed based on this structure has a higher Z-direction modal frequency.

[0090] Exemplarily, the ear module 200 also includes at least two first ear reinforcement ribs 220 arranged on the outside of the first ear sleeve 210, and the end of the first ear sleeve 210 facing away from the second connecting member 140 also extends to the outside of the anti-collision part 120. The first ear reinforcement rib 220 is located on the side of the anti-collision part 120 facing away from the second connecting member 140. The supporting part 131 adjacent to the ear module 200 is connected to at least one first ear reinforcement rib 220, and the first ear reinforcement rib 220 is also connected to the anti-collision part 120.

[0091] Exemplarily, two first lifting ear reinforcement ribs 220 are provided, one connecting the first lifting ear sleeve 210 and the supporting portion 131 located on the left side thereof, and the other connecting the first lifting ear sleeve 210 and the supporting portion 131 located on the right side thereof.

[0092] Exemplarily, four first hanging ear reinforcement ribs 220 are provided and symmetrically arranged on both sides of the first hanging ear sleeve 210 , and the first hanging ear reinforcement ribs 220 on both sides are respectively connected to the supporting parts 131 on both sides.

[0093] It is understandable that the first lifting ear reinforcement ribs 220 can also be set to other numbers, as long as the supporting parts 131 located on both sides of the lifting ear module 200 are connected to at least one first lifting ear reinforcement rib 220, and this embodiment does not limit it.

[0094] After the first lifting eye reinforcement rib 220 is provided, the first lifting eye reinforcement rib 220 can assist in transferring the load, thereby improving the mechanical properties of the first side beam 100 .

[0095] In some embodiments, see Figure 7 As shown, the anti-collision portion 120 includes a second connecting plate 121 and a reinforcement portion. The reinforcement portion is arranged on a side of the second connecting plate 121 away from the second connecting member 140 , and the reinforcement portion is located between two adjacent hanging ear modules 200 .

[0096] After the reinforcement part is added, part of the extrusion force can be dispersed and transmitted to the ear modules 200 on both sides through the reinforcement part, thereby improving the anti-collision capability.

[0097] Specifically, the first connecting member 130 is only provided at the corresponding position of the ear module 200, and two first connecting members 130 are provided corresponding to each ear module 200, and the two first connecting members 130 are provided on both sides of the ear module 200. At this time, the first connecting members 130 located on both sides of the ear module 200 can be symmetrically provided relative to the central axis of the ear module 200 to better transfer the load. The reinforcement part includes a third connecting plate 122 and two fourth connecting plates 123, the extension direction of the third connecting plate 122 is the same as the extension direction of the second connecting plate 121, the two ends of the third connecting plate 122 are connected to the two supporting parts 131 between the two ear modules 200, the third connecting plate 122 is connected to the side of the second connecting plate 121 away from the first side beam body 110, one end of the two fourth connecting plates 123 is connected to the third connecting plate 122, and the other end is connected to the two supporting parts 131 respectively.

[0098] The two fourth connecting plates 123 can be arranged opposite to each other, and the angle between the two fourth connecting plates 123 is 60°-150°. Within this angle range, the fourth connecting plates 123 can effectively transmit loads and have a better anti-deformation effect.

[0099] When in use, the third connecting plate 122 and the fourth connecting plate 123 can assist in transmitting the squeezing force and reduce the probability of deformation of the anti-collision portion 120 .

[0100] It is understandable that it is found in production that when aluminum alloy is used for integral molding, the first connecting plate, the second connecting plate 121, the third connecting plate 122, the fourth connecting plate 123, and the first lifting eye reinforcement rib 220 are all set to be 1.5-4 mm thick, which can meet the use requirements in most cases. Therefore, the thickness of the above components can be designed within this range, which can meet the use requirements and will not increase the thickness of the first side beam 100 due to excessive thickness. Of course, in some cases, it can also be set to be thicker or thinner, and this embodiment does not limit it here.

[0101] In some embodiments, the second connecting member 140 can be a fifth connecting plate, which extends in the same direction as the first side beam body 110, and the angle between the fifth connecting plate and the first side beam body 110 is 90°. The fifth connecting plate is connected to the top of the first side beam body 110, the top of the first connecting member 130 is attached to and connected to the bottom of the fifth connecting plate, and the bottom of the first connecting member 130 is flush with the bottom of the first side beam body 110, so that the connection area between the first connecting member 130 and the first side beam body 110 is larger to better transfer the load.

[0102] A first mounting hole 141 for mounting the cover of the battery pack and a first sealing groove 142 are provided at the top of the second connecting member 140. The extension direction of the first sealing groove 142 is the same as that of the second connecting member 140. A sealing strip can be placed in the first sealing groove 142 when mounting the cover of the battery pack so that the cover is sealed and connected to the first side beam 100. A second mounting hole is provided at the bottom of the first side beam body 110. The second mounting hole is used to mount the bottom guard plate of the battery pack. In this arrangement, there is no need to drill holes and open the first sealing groove 142 separately. Instead, the mold can be directly designed and integrally molded, thereby reducing the number of processes and the losses caused by errors in the processing process. This can effectively reduce the processing cost of the pallet in mass production and improve the consistency of the first side beam 100.

[0103] In addition, a boss may be provided on the first side beam body 110 close to the accommodating cavity, and connected to the tray bottom plate 500 via the boss.

[0104] In some embodiments, see Figure 1 and Fig. 9 As shown, the pallet frame also includes at least one middle crossbeam 400, the two ends of the middle crossbeam 400 are respectively connected to the two first side beams 100, and at least one crossbeam ear 440 is provided on the middle crossbeam 400. The middle crossbeam 400 may be parallel to the second side beam 300 or may not be parallel to the second side beam 300. This embodiment does not limit this. Of course, the bottom of the middle crossbeam 400 is connected to the pallet bottom plate 500.

[0105] Among them, the middle cross beam 400, the first side beam 100 and the second side beam 300 are all integrally die-cast, thereby improving the mechanical properties of the tray frame and providing reliable mechanical protection for the battery module.

[0106] In addition, the middle cross beam 400, the first side beam 100 and the second side beam 300 can all be die-casted with aluminum alloy, such as AlSi10MnMg, so as to reduce the weight of the pallet while ensuring that the strength of the pallet meets the requirements. Of course, the pallet can also be made of other materials that meet the use requirements. This embodiment is only an example and not a limitation.

[0107] In some embodiments, see Figure 8 As shown, a mounting portion 320 is provided on the second side beam 300 , and the mounting portion 320 is located at a side of the two second side beams 300 away from each other. At least one lifting ear hole 310 is provided on the mounting portion 320 , and the lifting ear hole 310 passes through the mounting portion 320 .

[0108] Specifically, the mounting portion 320 protrudes outward from the outside of the second side beam 300, and the ear hole 310 passes through the mounting portion 320, so that the upper and lower projection areas of the ear hole 310 are not blocked by other pallet structures, so that the bolts can be inserted into the ear hole 310 from the bottom of the ear hole 310 for installation. Compared with traditional pallets, the convenience of disassembly, assembly and maintenance can be effectively improved.

[0109] It is understandable that one or more fourth hanging ear sleeves can also be set on the mounting portion 320, the hanging ear hole 310 passes through the fourth hanging ear sleeve, and the fourth hanging ear sleeve is inserted on the mounting portion 320, so that the top of the fourth hanging ear sleeve extends to the outside of the mounting portion 320, so as to fine-tune the top of the fourth hanging ear sleeve.

[0110] In addition, a second sealing groove may be provided at the top of the second side beam 300 , the extension direction of the second sealing groove being the same as the extension direction of the second side beam 300 , and the second sealing groove being connected to the first sealing groove 142 , so as to achieve a better sealing effect after the cover of the battery pack is connected.

[0111] In some embodiments, see Fig. 9 , Fig.10 , Fig.12 and Fig.13 As shown, the middle cross beam 400 includes a first main rib 410, a second main rib 420 and at least two secondary ribs 430 extending in the same direction. The first main rib 410 and the second main rib 420 are arranged opposite to each other, one side of the secondary rib 430 is connected to the first main rib 410, and the other side is connected to the second main rib 420. The cross beam ear 440 is arranged between adjacent secondary ribs 430, and the first main rib 410, the second main rib 420, and the secondary rib 430 are all connected to the cross beam ear 440.

[0112] It can be understood that the number of secondary ribs 430 can be determined according to the number of cross beam ears 440. It is only necessary to provide secondary ribs 430 on both sides of each cross beam ear 440, and the shape of the secondary ribs 430 is adapted to the shape of the first main ribs 410 and the second main ribs 420, and can be connected to the tops of the first main ribs 410 and the second main ribs 420.

[0113] Specifically, if Figure 1 As shown, the first main rib 410 and the second main rib 420 both extend along the X direction, and the two can be parallel to each other or inclined so that the angle between them is 0°-30°. The inclined setting here can be that the tops of the first main rib 410 and the second main rib 420 are inclined toward each other, or one end of the first main rib 410 and the second main rib 420 for connecting with the first side beam 100 is inclined toward each other, and this embodiment does not limit it here.

[0114] In addition, after many production tests, it was found that when the middle cross beam 400 is formed of aluminum alloy, the thickness of the first main rib 410, the second main rib 420 and the secondary rib 430 is 2.5-4 mm. While being lightweight, it can meet the usage requirements in most cases. Of course, this is just an example, and the thickness of the first main rib 410, the second main rib 420 and the secondary rib 430 can also be other values, which are not limited in this embodiment.

[0115] In some embodiments, see Fig.10 and Fig.11 As shown, the beam lifting eye 440 includes a second lifting eye sleeve 441 and at least four second lifting eye reinforcement ribs 443 disposed on the second lifting eye sleeve 441. The second lifting eye sleeve 441 is provided with a second through hole 442 for connecting a bolt through the second through hole 442. Among the four second lifting eye reinforcement ribs 443, one is connected to the first main rib 410, one is connected to the second main rib 420, and the other two are respectively connected to the secondary ribs 430 located on both sides of the second lifting eye sleeve 441.

[0116] Therefore, the second lifting ear reinforcement rib 443 can be used to improve the connection strength between the second lifting ear sleeve 441 and the first main rib 410, the second main rib 420 and the secondary rib 430, and the second lifting ear reinforcement rib 443 can assist in transferring the load to improve the performance of the middle cross beam 400.

[0117] In some embodiments, see Fig.14 and Fig.15 As shown, a third lifting ear sleeve 450 is further provided below the crossbeam lifting ear 440, and the third lifting ear sleeve 450 is respectively connected to the first main rib 410 and the second main rib 420, and a third through hole 451 coaxial with the second through hole 442 is provided on the third lifting ear sleeve 450, and the inner diameter of the third through hole 451 is larger than the inner diameter of the second through hole 442.

[0118] Specifically, a third lifting ear sleeve 450 is arranged under each second lifting ear sleeve 441, and the top of the third lifting ear sleeve 450 is connected to the bottom of the second lifting ear reinforcement rib 443, and is also connected to the first main rib 410 and the second main rib 420 respectively. The third lifting ear sleeve 450 can assist in improving the strength of the middle cross beam 400, and it is also convenient for installing and positioning the fastening nut, that is, the fastening nut can be inserted into the second through hole 442 through the third through hole 451 from the bottom, and the inner diameter of the third through hole 451 is larger than the inner diameter of the second through hole 442, which is convenient for inserting the fastening bolt. At the same time, after the fastening nut is screwed into place, the end will be stuck at the end of the second lifting ear sleeve 441 and be in the third through hole 451.

[0119] In addition, it is found in production that the wall thickness of the third hanging ear sleeve 450 can be set to 2.5-4 mm, which has a good reinforcement effect without causing excessive weight.

[0120] In some embodiments, see Fig.15 As shown, a connecting platform 460 is provided on the end of the first main rib 410 and the second main rib 420 away from the secondary rib 430. The connecting platform 460 is located on the side of the first main rib 410 and the second main rib 420 away from each other. The connecting platform 460 is respectively used to connect to a pallet bottom plate 500 of the pallet.

[0121] Specifically, the pallet bottom plate 500 can be divided into multiple pieces, and the specific number can be determined according to the number of intermediate beams 400. As long as the intermediate beams 400 are located between two adjacent pallet bottom plates 500, when the intermediate beams 400 are connected to the pallet bottom plates 500, they can be welded to the pallet bottom plates 500 through the connecting platform 460.

[0122] In addition, it was found during the production process that the thickness of the connection platform 460 can be 3-5 mm, which is neither too thick nor too thick and can avoid the occurrence of welding penetration.

[0123] The middle cross beam 400 includes a first main rib 410, a second main rib 420, a secondary rib 430, and a cross beam lug 440. The components cooperate with each other, which not only has a simple structure and high strength, but also has a good lightweight effect, a simple demoulding process, and high production efficiency.

[0124] In addition, after the middle cross beam 400 is welded to the tray bottom plate 500 through the connecting platform 460, the second through hole 442 and the third through hole 451 are not blocked above and below, and the first through hole 211 on the first lifting ear sleeve 210 and the lifting ear hole 310 on the second side beam 300 are not blocked above and below. When connecting with electrical equipment, the fastening bolts can be inserted upward from the bottom of the third through hole 451, the first through hole 211, and the lifting ear hole 310, and the connecting part of the electrical equipment is located at the top of the second through hole 442, the first through hole 211, and the lifting ear hole 310, which is not only convenient for installation but also convenient for disassembly.

[0125] At the same time, the structure of the pallet frame also allows the mold to be directly moved in both the positive and reverse directions of the Z direction for demolding after the pallet frame is die-cast in one piece, which helps to reduce mold design and processing costs and improve the die-casting efficiency of the mold, thereby significantly reducing the cost of mass production of the pallet frame.

[0126] In some embodiments, see Fig.10As shown, the first main rib 410 and the second main rib 420 are provided with avoidance notches 470 that cooperate with each other, and at least one avoidance notch 470 is provided in the middle and at both ends of the first main rib 410 or the second main rib 420, and the shape of the secondary rib 430 is adapted to the shape of the first main rib 410 and the second main rib 420.

[0127] Specifically, the heights of the middle and both ends of the first main rib 410 and the second main rib 420 can be made lower than those of other positions, thereby forming avoidance gaps 470 in the middle and at both ends due to the height difference, and the secondary ribs 430 are still connected to the tops of the first main rib 410 and the second main rib 420 at the avoidance gaps 470 to increase strength.

[0128] At the same time, end plates may be provided at both ends of the first main rib 410 and the second main rib 420, i.e., at both ends for connection with the first side beam 100, and the ends of the first main rib 410 and the second main rib 420 may be connected by the end plates for reinforcement.

[0129] After the avoidance gaps 470 are provided on the first main rib 410 and the second main rib 420 , the avoidance gaps 470 can be used to provide space for electrical circuits in the battery pack, thereby facilitating wiring inside the battery pack.

[0130] In addition, cross beam reinforcement ribs 480 may be provided at the avoidance notches 470 located in the middle of the first main rib 410 and the second main rib 420 , and the cross beam reinforcement ribs 480 are connected and reinforced with the first main rib 410 and the second main rib 420 , respectively.

[0131] The cross beam reinforcement rib 480 may be provided as one or more, such as one at each end of the avoidance notch 470, which is not limited in this embodiment. At the same time, the thickness of the cross beam reinforcement rib 480 may be relatively thin. It is found in production that the thickness of the cross beam reinforcement rib 480 is 1.5-3 mm to meet the use requirements. Of course, the thickness of the cross beam reinforcement rib 480 may also be set to other sizes, which is not limited in this embodiment.

[0132] The structures of the pallet frames in the embodiments of the present application have been verified by the calculation method of topological optimization, and it is found that the pallet frames can meet the use requirements under various working conditions. In the optimization process, the main method is to control the addition and deletion of units by changing the material density of each unit, and gradually achieve the optimal distribution of materials in space. Taking the first side beam 100 as an example, the simulation can be performed in the following steps:

[0133] 1. Establish a simulation model: First, divide the battery pack model into grids, establish connection relationships, define material parameters, etc., and then define the envelope structure such as the first hanging ear sleeve 210, the first side beam body 110, and the second connecting member 140 as the non-design domain, and then define the remaining areas within the outer envelope of the side beam as the design domain.

[0134] 2. Define design variables: Define design variables based on the side beam design domain, set the demoulding direction to be from top to bottom; define the minimum and maximum thickness dimensions, minimum spacing, etc. of the design variables to control the generation effect of the ribs; and set the design domains of the two first side beams 100 to be symmetrically constrained.

[0135] 3. Define load steps: Establish load analysis steps for calculating battery pack modal, extrusion, torsion and other working conditions.

[0136] 4. Define the response: Establish the modal frequency of the first-order main vibration mode of the battery pack, the deformation of the extrusion condition, the deformation of the torsion condition, and other analysis results, as well as the response parameters of the volume fraction (or mass) of the tray design domain; and define the weighting coefficient according to the response parameters and importance of a single condition, and establish the weighted response parameters of these conditions.

[0137] 5. Define constraints: Use the volume fraction (or mass) response of the tray design domain as a constraint in the optimization process and define the upper limit of the remaining volume fraction (or mass) after the design domain is optimized.

[0138] 6. Define the optimization goal: The weighted response parameters of multiple working conditions are used as the optimization target. The ultimate goal is to maximize the modal frequency, minimize the extrusion deformation, and achieve the torsional stiffness at the preset conditions.

[0139] 7. Submit the calculation, and after the optimization target reaches the convergence condition, output the topology optimization results.

[0140] It is understandable that other components may also be simulated in a similar manner by modifying corresponding conditions and parameters accordingly, and this embodiment does not limit this.

[0141] In general, the pallet frame provided in the embodiment of the present application is designed in combination with the results of topological optimization. It takes into account the mechanical properties and lightweight goals of the battery pack under working conditions such as vibration and side column collision, and has obvious cost advantages in mass production. The battery pack with the pallet frame is easy to disassemble and assemble on electrical equipment such as vehicle frames, and has high maintenance efficiency.

[0142] The present application also provides a tray, such as Figure 1 As shown, it includes the pallet frame and the pallet bottom plate 500 in the above embodiment, and the pallet frame is connected to the pallet bottom plate 500.

[0143] That is, the first side beam 100 , the second side beam 300 , the middle cross beam 400 and other components can all be welded to the tray bottom plate 500 to cooperate with the tray bottom plate 500 to form a receiving cavity for receiving the battery module.

[0144] An embodiment of the present application also provides a battery pack, which includes a battery pack body and the tray in the above embodiment. The battery pack body may include corresponding components such as a cover plate, a battery module, and a cooling system, wherein the tray can be connected to the cover plate of the battery pack to seal the accommodating cavity, and the battery module is located in the accommodating cavity and protected by the cover plate and the tray.

[0145] It is understandable that the structure of each component in the battery pack, the working principle of the battery pack, and the connection method of each component are all well known to technicians in this field, and will not be described in detail in this embodiment.

[0146] The embodiment of the present application also provides an electrical device, which includes a device body and a battery pack, and the battery pack is connected to the device body through components such as a lifting ear module 200 and a beam lifting ear 440.

[0147] It can be understood that the electrical equipment in this embodiment includes but is not limited to electric vehicles, hybrid vehicles, energy storage systems, consumer electronic products, medical equipment, drones, power tools and other equipment that require the use of battery packs.

[0148] Finally, it should be noted that those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application content disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application, is not limited to the precise structure described above and shown in the drawings, and can be modified and changed in various ways without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A pallet frame, characterized in that: The invention comprises a first side beam (100), wherein the first side beam (100) comprises a first side beam body (110), an anti-collision portion (120) and at least two first connecting members (130), wherein the anti-collision portion (120) has the same extension direction as the first side beam body (110), the anti-collision portion (120) is fixed to one side of the first side beam body (110) through the first connecting member (130), and a gap is provided between at least a part of the anti-collision portion (120) and the first side beam body (110), and a plurality of lifting lug modules (200) are arranged on the anti-collision portion (120), and the lifting lug modules (200) are arranged in sequence along the extension direction of the anti-collision portion (120).

2. The pallet frame according to claim 1, characterized in that: The lifting lug module (200) and the first side beam (100) are integrally die-cast.

3. The tray frame according to claim 1, characterized in that: A supporting portion (131) is provided at one end of the first connecting member (130), and the supporting portion (131) extends to the bottom of the anti-collision portion (120) and is connected to the anti-collision portion (120).

4. The tray frame according to claim 3, characterized in that: A limiting portion (132) is also provided on the first connecting member (130), and the limiting portion (132) is connected to a side of the anti-collision portion (120) facing away from the supporting portion (131).

5. The tray frame according to claim 3, characterized in that: A slope (133) is provided on the side of the supporting portion (131) facing away from the first side beam body (110).

6. The pallet frame according to claim 3, characterized in that: The first side beam (100) further comprises a second connecting member (140) connected to the first side beam body (110), and an end of the first connecting member (130) facing away from the supporting portion (131) is connected to the second connecting member (140).

7. The tray frame according to claim 6, characterized in that: The distance between the second connecting member (140) and the first side beam body (110) and the side facing away from the first side beam body (110) is less than or equal to the width of the gap.

8. The pallet frame according to claim 6, characterized in that: At least one first connecting member (130) is disposed on both sides of each of the hanging ear modules (200).

9. The tray frame according to claim 8, characterized in that: The lifting ear module (200) comprises a first lifting ear sleeve (210), the first lifting ear sleeve (210) is provided with a first through hole (211), and the first lifting ear sleeve (210) is inserted into the anti-collision part (120).

10. The tray frame according to claim 9, characterized in that: The lifting ear module (200) further comprises at least two first lifting ear reinforcement ribs (220) arranged on the outside of the first lifting ear sleeve (210), wherein the first lifting ear reinforcement ribs (220) are located on the side of the anti-collision portion (120) away from the second connecting member (140), and the supporting portion (131) adjacent to the lifting ear module (200) is connected to at least one of the first lifting ear reinforcement ribs (220), and the first lifting ear reinforcement rib (220) is also connected to the anti-collision portion (120).

11. The tray frame according to claim 10, characterized in that: The anti-collision portion (120) comprises a second connecting plate (121) and a reinforcing portion, wherein the reinforcing portion is arranged on a side of the second connecting plate (121) away from the second connecting member (140), and the reinforcing portion is located between two adjacent hanging ear modules (200).

12. The tray frame according to claim 11, characterized in that: The reinforcing portion comprises a third connecting plate (122) and two fourth connecting plates (123); the extension direction of the third connecting plate (122) is the same as the extension direction of the second connecting plate (121); two ends of the third connecting plate (122) are correspondingly connected to the supporting portion (131), and the third connecting plate (122) is connected to the side of the second connecting plate (121) facing away from the first side beam body (110); one end of the two fourth connecting plates (123) is connected to the third connecting plate (122), and the other end is respectively connected to the two supporting portions (131).

13. The pallet frame according to claim 12, characterized in that: The two fourth connecting plates (123) are arranged opposite to each other, and the angle between the two fourth connecting plates (123) is 60-150°.

14. The pallet frame according to any one of claims 1 to 13, characterized in that: It also includes a second side beam (300) and an intermediate cross beam (400) which are integrally formed with the first side beam (100); two of the first side beam (100) and two of the second side beam (300) are provided, the two first side beams (100) are arranged opposite to each other, the two second side beams (300) are respectively arranged at the two ends of the first side beam (100), and the two ends of the second side beam (300) are correspondingly connected to the ends of the two first side beams (100); at least one intermediate cross beam (400) is provided, and the two ends of the intermediate cross beam (400) are respectively connected to the two first side beams (100), and at least one cross beam hanging ear (440) is provided on the intermediate cross beam (400).

15. The tray frame according to claim 14, characterized in that: The second side beam (300) is provided with a mounting portion (320), the mounting portion (320) is located on a side of the two second side beams (300) that are away from each other, and the mounting portion (320) is provided with at least one lifting ear hole (310), the lifting ear hole (310) passing through the mounting portion (320).

16. The tray frame according to claim 14, characterized in that: The intermediate cross beam (400) comprises a first main rib (410), a second main rib (420) and at least two secondary ribs (430) extending in the same direction; the first main rib (410) and the second main rib (420) are arranged opposite to each other; one side of the secondary rib (430) is connected to the first main rib (410) and the other side is connected to the second main rib (420); the cross beam lug (440) is arranged between adjacent secondary ribs (430), and the first main rib (410), the second main rib (420) and the secondary rib (430) are all connected to the cross beam lug (440).

17. The tray frame according to claim 16, characterized in that: The crossbeam lifting ear (440) comprises a second lifting ear sleeve (441) and at least four second lifting ear reinforcement ribs (443) arranged on the second lifting ear sleeve (441), the second lifting ear sleeve (441) is provided with a second through hole (442), and among the four second lifting ear reinforcement ribs (443), one is connected to the first main rib (410), one is connected to the second main rib (420), and the other two are respectively connected to the secondary ribs (430) located on both sides of the second lifting ear sleeve (441).

18. The tray frame according to claim 17, characterized in that: A third lifting ear sleeve (450) is also provided below the crossbeam lifting ear (440), and the third lifting ear sleeve (450) is respectively connected to the first main rib (410) and the second main rib (420), and a third through hole (451) coaxial with the second through hole (442) is provided on the third lifting ear sleeve (450), and the inner diameter of the third through hole (451) is larger than the inner diameter of the second through hole (442).

19. The tray frame according to claim 16, characterized in that: The first main rib (410) and the second main rib (420) are provided with avoidance notches (470) that match each other, and at least one avoidance notch (470) is provided in the middle and at both ends of the first main rib (410) or the second main rib (420), and the shape of the secondary rib (430) is adapted to the shape of the first main rib (410) and the second main rib (420).

20. The tray frame according to claim 16, characterized in that: A connecting platform (460) is provided at one end of the first main rib (410) and the second main rib (420) facing away from the secondary rib (430). The connecting platform (460) is located on the side of the first main rib (410) and the second main rib (420) facing away from each other. The connecting platform (460) is respectively used to be connected to a pallet bottom plate (500) of the pallet.

21. A pallet, characterized in that: It comprises a pallet bottom plate (500) and a pallet frame as described in claims 1 to 20, wherein the pallet frame is connected to the pallet bottom plate (500).

22. A battery pack, characterized in that: It comprises a battery pack body and the tray according to claim 21, wherein the tray is connected to the battery pack body.

23. An electrical equipment, characterized in that: It comprises a device body and a battery pack as claimed in claim 22, wherein the battery pack is fixed on the device body.

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