Tray, battery pack and electric equipment

Abstract

The utility model relates to a tray, a battery pack and electric equipment, the tray comprises an outer shell and an inner shell, the inner shell is used for bearing a battery, the outer shell is connected to one side of the inner shell along the thickness direction, a cavity is formed between the outer surface of the inner shell and the inner surface of the outer shell, filler is arranged in the cavity, and the filler is of a porous structure. According to the tray, the cavity is formed between the outer surface of the inner shell and the inner surface of the outer shell, the filler of the porous structure is correspondingly arranged in the cavity, the filler of the porous structure is used for absorbing energy, the structural strength and impact resistance of the tray can be effectively guaranteed, and meanwhile the light weight effect of the tray can be improved.

Description

Technical Field

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

[0002] As the main load-bearing component of the power battery of new energy vehicles, the pallet is an important guarantee for the safety of the battery system. The weight of the pallet accounts for about 20% to 30% of the battery system. Its main function is to protect the battery and prevent the battery from being damaged by vibration, collision and friction during the driving process of the vehicle. At the same time, it can also improve the vehicle's load capacity and stability.

[0003] The existing tray uses an aluminum profile frame and is produced by welding. In order to ensure the structural strength and impact resistance of the tray, it is usually necessary to add a reinforcement plate for welding, which increases the weight of the battery pack and cannot meet the current demand for lightweight battery packs. Utility Model Content

[0004] To solve the above problems, the present application provides a pallet, which optimizes the structure of the pallet and arranges fillers in the pallet to ensure the structural strength and impact resistance of the pallet while improving the lightweight effect of the pallet. In addition, the present application also provides a battery pack and electrical equipment equipped with the pallet, which specifically include the following solutions:

[0005] In a first aspect, the present application provides a tray for carrying batteries, the tray comprising an outer shell and an inner shell, the inner shell being used to carry the batteries, the outer shell being connected to one side of the inner shell along the thickness direction, a cavity being formed between the outer surface of the inner shell and the inner surface of the outer shell, a filler being arranged in the cavity, and the filler being a porous structure.

[0006] The present application sets a tray including an outer shell and an inner shell, and sets the outer shell to be connected to one side of the inner shell along the thickness direction, that is, the outer shell at least partially covers the outer surface of the inner shell to protect the inner shell, and the inner shell is used to carry the battery. Furthermore, the present application tray forms a cavity between the outer surface of the inner shell and the inner surface of the outer shell, and a porous filler is set in the cavity accordingly. The porous filler absorbs energy, which can effectively ensure the structural strength and impact resistance of the present application tray, and at the same time improve the lightweight effect of the present application tray.

[0007] In a possible embodiment, along a direction perpendicular to the stacking direction of the inner shell and the outer shell, the cross-sectional shape of the pores of the filler is a hexagon.

[0008] In this embodiment, the hexagonal structure is relatively stable. In the stacking direction perpendicular to the inner shell and the outer shell, the cross-sectional shape of the pores of the filler is set to be hexagonal, that is, the end faces of the pores are hexagonal, or it can be understood that the filler is honeycomb-shaped, thereby ensuring the lightweight effect of the pallet of the present application while improving the impact resistance of the pallet of the present application.

[0009] In a possible embodiment, the pores of the filler extend along the stacking direction of the inner shell and the outer shell.

[0010] In this embodiment, by arranging the pores of the filler to extend along the stacking direction of the inner shell and the outer shell, the pores are restrained from each other, which can disperse the pressure from the surfaces of the outer shell and the inner shell, thereby effectively improving the stability and impact resistance of the pallet.

[0011] In a possible embodiment, along a direction perpendicular to the stacking direction of the inner shell and the outer shell, the wall thickness of the pores of the filler is greater than or equal to 0.1 mm and less than or equal to 0.6 mm.

[0012] In this embodiment, in the stacking direction perpendicular to the inner shell and the outer shell, the wall thickness of the pores of the filler is set to 0.1mm~0.6mm. On the one hand, it can avoid the wall thickness of each pore being too thin and unable to meet the impact resistance requirements of the pallet of the present application; on the other hand, it can avoid the wall thickness of each pore being too thick, which increases the weight of the pallet of the present application.

[0013] In a possible embodiment, the pore diameter of the filler is greater than or equal to 10 mm and less than or equal to 18 mm.

[0014] In this embodiment, by setting the pore diameter of the filler to be between 10 mm and 18 mm, on the one hand, it can avoid the pores being too small, reducing the porosity of the filler, resulting in a small ratio of pores to solids, thereby causing the weight of the pallet of the present application to be too large. On the other hand, it can avoid the pores being too large, which affects the structural strength and impact resistance of the pallet of the present application.

[0015] In a possible embodiment, the material of the filler is aluminum or an aluminum-containing alloy.

[0016] In this embodiment, based on the advantages of aluminum or aluminum alloy materials such as good thermal conductivity, low density, good ductility, and good weldability, aluminum or aluminum alloy is used to make the filler. While ensuring the strength, rigidity and collision safety requirements of the filler, it is also beneficial to optimize the cooling effect of the tray of the present application on the battery, further enhance the lightweight effect of the tray, and can also reduce the difficulty of making fillers with porous structures.

[0017] In a possible embodiment, the filler and the inner shell and / or the outer shell, and the inner shell and the outer shell are fixedly connected by brazing.

[0018] In this embodiment, the filler is fixedly connected to the inner shell and / or the outer shell by brazing, or the inner shell and the outer shell are fixedly connected by brazing to replace the laser welding in the prior art. This can avoid structural damage to the filler, the inner shell and the outer shell that may be caused by laser welding. At the same time, it can reduce the stress concentration caused by welding and improve the overall flatness of the inner shell and the outer shell.

[0019] In a possible embodiment, each pore of the porous structure is formed by brazing at least two aluminum sheets.

[0020] In this embodiment, a filler with a porous structure is formed by brazing a plurality of aluminum sheets, and the filler can be brazed integrally with the inner shell and the outer shell synchronously, thereby improving welding efficiency and simplifying the forming process.

[0021] In a possible embodiment, a protrusion is provided on the bottom plate of the outer shell, and the protrusion extends in a direction away from the bottom plate of the inner shell, and a hollow channel is formed between the protrusion and the bottom plate of the inner shell.

[0022] In this embodiment, a protrusion is provided on the bottom plate of the outer shell, and the protrusion is provided to extend in a direction away from the bottom plate of the inner shell, so that after the inner shell and the outer shell are stacked, the bottom plate of the inner shell and the protrusion cooperate to form a hollow channel. The cooling medium is input into the hollow channel, so that the tray of the present application can carry the battery while also achieving a cooling effect on the battery. That is, the tray of the present application can not only realize the basic function of the tray, but also act as a cooler to absorb the heat generated by the battery. The tray and the cooler are arranged as one, which can improve the energy density of the battery and meet the miniaturized design of the battery pack.

[0023] In a possible embodiment, a first flange is provided on the outer periphery of the outer shell, a second flange is provided on the outer periphery of the inner shell, and the first flange and the second flange are connected to seal the cavity.

[0024] In this embodiment, by providing the first flange and the second flange, the surface contact area between the outer shell and the inner shell can be increased, thereby facilitating the brazing of the inner shell and the outer shell and improving the brazing quality.

[0025] In a possible embodiment, the bottom plate of the inner shell is provided with at least two openings, the at least two openings are arranged at intervals and are respectively connected to the channels, and the at least two openings are used to connect to the external cooling pipeline.

[0026] In this embodiment, an opening is provided on the bottom plate of the inner shell, and the opening is connected to the external cooling pipeline and the channel to ensure the fluidity of the cooling medium and ensure that the tray of the present application can continuously achieve the cooling effect on the battery.

[0027] In a possible embodiment, the outer shell includes a first bottom plate and a first side wall arranged around the periphery of the bottom plate, the inner shell includes a second bottom plate and a second side wall arranged around the periphery of the second bottom plate, and the first side wall and a portion of the first bottom plate as well as the second side wall and a portion of the second bottom plate cooperate to form a cavity.

[0028] In this embodiment, based on the battery being supported on the bottom plate of the inner shell, a cavity is formed by arranging a first side wall and a portion of the first bottom plate as well as a second side wall and a portion of the second bottom plate to cooperate with each other, so that a filler is arranged in the formed cavity for buffering and energy absorption, which can reduce the production cost while ensuring the impact resistance of the tray of the present application.

[0029] In a second aspect, the present application provides a battery pack, comprising a battery, an upper cover, and a tray as in any of the above embodiments, wherein the tray is fixedly connected to the upper cover to form a receiving cavity, the battery is received in the receiving cavity and carried on the tray, and the battery is used to provide electrical energy.

[0030] It can be understood that the battery pack provided in the second aspect of the present application, because it adopts the tray provided in the first aspect of the present application, also has all possible beneficial effects in any embodiment provided in the first aspect of the present application.

[0031] In a third aspect, the present application provides an electrical device, comprising a functional module and a battery pack in the embodiment of the second aspect, wherein the battery pack is used to provide electrical energy to the functional module.

[0032] It can be understood that the electrical equipment provided in the third aspect of the present application, because it adopts the battery pack provided in the second aspect of the present application, also has all possible beneficial effects in the embodiments provided in the second aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0034] Figure 1 This is a structural schematic diagram of a tray provided in one embodiment of the present application from one side perspective;

[0035] Figure 2 A schematic cross-sectional view of a partial structure of a tray provided in another embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of the structure of a shell and a filler provided in one embodiment of the present application;

[0037] Figure 4 A schematic structural diagram of a filler provided in one embodiment of the present application from one side perspective;

[0038] Figure 5 A schematic structural diagram of a filler provided in another embodiment of the present application from another side perspective;

[0039] Figure 6 This is a schematic diagram of the structure of the pores of the filler provided in one embodiment of the present application.

[0040] Figure numbers: 100-tray; 10-outer shell; 11-first bottom plate; 12-first side wall; 13-first receiving groove; 14-raised portion; 20-inner shell; 21-second bottom plate; 22-second side wall; 23-second receiving groove; 24-opening; 31-first flange; 32-second flange; 40-cavity; 50-filler; 51-pore; 52-bending groove; 53-connecting portion; 60-temperature averaging plate; 70-flow channel plate; 71-recessed portion; 72-channel. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0042] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, 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 cannot be understood as a limitation to the present application.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] The power-consuming equipment involved in the present application includes functional modules and battery packs. Among them, the battery pack is used to provide electrical energy to the functional modules. Specifically, in one embodiment, the power-consuming equipment may include a vehicle, and the battery pack provided in the present application may be applied to the vehicle. The battery pack is fixed to the body of the vehicle and is used to provide electrical energy to various functional modules of the vehicle. For example, the battery pack can be used for the working power requirements of the vehicle during starting, navigation and driving. In other embodiments, the battery pack can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. Among them, the vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0046] It is understandable that the battery pack described in the embodiments of the present application is not limited to vehicles. The battery provided in the present application can also be applied to but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc., and the present application does not specifically limit this.

[0047] Furthermore, the battery pack may include a battery, an upper cover and a tray. The upper cover is fixedly connected to the tray to form a receiving cavity. The battery is received in the receiving cavity and carried on the tray. That is, the upper cover and the tray cooperate together as a shell to receive and protect the battery to prevent the battery from being damaged by vibration, collision, friction, etc. during the driving of the vehicle. The battery draws the current out of the shell through the wiring harness and connector in the electrical system to transmit the battery's electrical energy to the functional module outside the battery pack to provide electrical energy to the functional module. When the battery is a rechargeable battery, the external power source can be transmitted to the battery in the battery pack through the wiring harness and connector in the electrical system to charge the battery.

[0048] Please see Figure 1 and Figure 2 ,in Figure 1 This is a structural schematic diagram of a tray 100 provided in one embodiment of the present application from one side perspective; Figure 2 It is a schematic cross-sectional structure diagram of a partial structure of a tray 100 provided in another embodiment of the present application.

[0049] like Figure 1 and Figure 2 As shown, in one embodiment, the tray 100 of the present application includes an outer shell 10 and an inner shell 20. The outer shell 10 includes a first bottom plate 11 and a first side wall 12, the first side wall 12 is arranged around the periphery of the first bottom plate 11, and the first bottom plate 11 and the first side wall 12 cooperate to form a first receiving groove 13. The battery is carried on the tray 100, that is, the battery is accommodated in the first receiving groove 13 and is arranged on the first bottom plate 11. The second bottom plate 21 and the second side wall 22 cooperate to form a second receiving groove 23. The outer shell 10 is connected to one side of the inner shell 20 along the thickness direction of the first bottom plate 11, that is, the outer shell 10 at least partially covers the outer surface of the inner shell 20, or it can be understood that the inner shell 20 is arranged in the second receiving groove 23. The top of the first side wall 12 has a first flange 31 extending toward the outside of the first receiving groove 13, and the top of the second side wall 22 also has a second flange 32 extending toward the outside of the second receiving groove 23. The first flange 31 and the second flange 32 are connected and fixed to each other to fix the inner shell 20 and the outer shell 10. A cavity 40 is formed between the outer surface of the inner shell 20 and the inner surface of the outer shell 10. It should be noted that the outer surface of the inner shell 20 is the surface of the inner shell 20 on the side close to the outer shell 10, and the inner surface of the outer shell 10 is the surface of the outer shell 10 on the side close to the inner shell 20. Specifically, the first side wall 12 and a part of the first bottom plate 11 and the second side wall 22 and a part of the second bottom plate 21 cooperate to enclose and form the cavity 40. A filler 50 is provided in the cavity 40, that is, a filler 50 is provided in the second receiving groove 23, and the filler 50 is a porous 51 structure.

[0050] It can be understood that in this embodiment, the present application sets the outer shell 10 to at least partially cover the outer surface of the inner shell 20 for protecting the inner shell 20, and the inner shell 20 is set to carry the battery. Further, the present application tray 100 sets a filler 50 in the cavity 40 formed by the outer surface of the inner shell 20 and the inner surface of the outer shell 10, and the filler 50 is set to a porous 51 structure, so that the filler 50 with a porous 51 structure can absorb energy, which can effectively ensure the structural strength and impact resistance of the present application tray 100, and at the same time improve the lightweight effect of the present application tray 100.

[0051] In one embodiment, the first flange 31 and the second flange 32 are fixedly connected by brazing to connect and fix the first side wall 12 and the second side wall 22, thereby sealing the cavity 40. It can be understood that compared with the first side wall 12 and the second side wall 22 being connected by splicing welding, the first side wall 12 and the second side wall 22 are integrally brazed to optimize the flatness of the product and improve the rigidity of the tray 100 of the present application.

[0052] Please see Figure 3 The structure diagram of the shell 10 and the filler 50 provided in one embodiment of the present application is shown.

[0053] like Figures 1 to 3 As shown, in one embodiment, the tray 100 includes a temperature averaging plate 60 and a flow channel plate 70, both of which are "ship-shaped" structures, the battery is carried on the temperature averaging plate 60, and the flow channel plate 70 is located on the side of the temperature averaging plate 60 away from the battery. A plurality of recessed portions 71 are provided on the surface of the flow channel plate 70 facing the temperature averaging plate 60, and the recessed portions 71 can be formed by stamping the flow channel plate 70. The temperature averaging plate 60 is stacked on the flow channel plate 70 and covers the recessed portions 71, and cooperates with the plurality of recessed portions 71 to form a plurality of hollow channels 72. A cooling medium flows in the channel 72 to absorb the heat generated by the battery. The temperature averaging plate 60 and the recessed portions 71 are provided at the same time to form a cooling channel 72, which can increase the contact area between the cooling channel 72 and the battery, thereby facilitating the absorption of the heat generated by the battery, ensuring the uniformity of the temperature of each part of the battery, and improving the service life of the battery.

[0054] In one embodiment, the outer shell 10 of the tray 100 is formed by integrally stamping the flow channel plate 70, and the inner shell 20 of the tray 100 is formed by integrally stamping the temperature equalizing plate 60. It can be understood that by adopting a stamping process to make the outer shell 10 and the inner shell 20, the manufacturing process of the tray 100 of the present application can be simplified, while also ensuring the structural integrity of the tray 100 of the present application. In addition, setting the outer shell 10 as the flow channel plate 70, that is, integrating the tray 100 with the cooler, is conducive to the miniaturized design of the battery pack, and can further enhance the lightweight effect of the battery pack.

[0055] In one embodiment, the area where the temperature averaging plate 60 and the flow channel plate 70 are provided with the recessed portion 71 is the cooling area, and the projection of the battery on the bottom plate in the direction perpendicular to the bottom plate plane is contained in the cooling area. That is, the battery is completely arranged in the cooling area. It can be understood that arranging the battery in the cooling area is conducive to improving the heat exchange efficiency of the battery.

[0056] Please look back Figure 2 In one embodiment, based on the fact that both the temperature balancing plate 60 and the flow channel plate 70 are set to a "boat-shaped" structure, a cavity 40 is formed between the first bottom plate 11 and the second bottom plate 21, the first side wall 12 and the second side wall 22, and a filler 50 is arranged in the cavity 40. The filler 50 is arranged at the outer edge of the channel 72, that is, at the periphery of the cooling zone. It can be understood that in this embodiment, by arranging the filler 50 at the periphery of the cooling zone, the tray 100 can be guaranteed to achieve the cooling function while also improving the impact resistance of the tray 100.

[0057] It should be noted that, in the above-mentioned embodiment, the position of the filler 50 is only introduced as an example, and does not represent the specific position of the filler 50 in other embodiments of the present application. That is, the position of the filler 50 of the present application can be adaptively adjusted according to the actual application scenario, and the present application does not specifically limit this. For example, in one embodiment, the filler 50 can be arranged only between the first base plate 11 and the second base plate 21. It can be understood that based on the fit between the battery and the second base plate 21, that is, the second base plate 21 is the main load-bearing component of the battery, by arranging the filler 50 at the main force-bearing position, the production cost can be reduced while ensuring the impact resistance of the tray 100 of the present application.

[0058] In one embodiment, the filler 50 needs to occupy at least 80% of the volume of the cavity 40 to ensure the impact resistance of the tray 100 .

[0059] Please look back Figure 2 In one embodiment, the pores 51 of the filler 50 extend along the stacking direction of the inner shell 20 and the outer shell 10. That is, the pores 51 of the filler 50 extend along the plane direction perpendicular to the first bottom plate 11. It can be understood that in this embodiment, by setting the pores 51 of the filler 50 to extend along the plane direction perpendicular to the first bottom plate 11, the pores 51 are mutually restrained, and the pressure from the surface of the outer shell 10 and the inner shell 20 can be dispersed, thereby effectively improving the stability and impact resistance of the tray 100.

[0060] Please see Figure 4 and Figure 5 ,in Figure 4 A schematic structural diagram of a filler 50 provided in one embodiment of the present application from one side perspective; Figure 5This is a schematic structural diagram from another side perspective of a filler 50 provided in another embodiment of the present application.

[0061] like Figures 1 to 5 As shown, in one embodiment, along the stacking direction perpendicular to the inner shell 20 and the outer shell 10, that is, along the stacking direction perpendicular to the first bottom plate 11, the cross-sectional shape of the pores 51 of the filler 50 is a hexagon. It can be understood that in this embodiment, based on the relatively stable structure of the hexagon, in the stacking direction perpendicular to the inner shell 20 and the outer shell 10, by setting the cross-sectional shape of the pores 51 of the filler 50 to be a hexagon, that is, the end face of the pores 51 is a hexagon, or it can be understood that the filler 50 is honeycomb, so that while ensuring the lightweight effect of the pallet 100 of the present application, the impact resistance of the pallet 100 of the present application can be improved.

[0062] It should be noted that in the above-mentioned embodiment, the cross-sectional shape of the pore 51 of the filler 50 is only used as an exemplary introduction and does not represent the cross-sectional shape of the pore 51 in other embodiments of the present application, that is, the cross-sectional shape of the pore 51 in the embodiment of the present application can be adaptively adjusted according to the actual application scenario, and the present application does not specifically limit this. For example, in one embodiment, the cross-sectional shape of the pore 51 of the filler 50 can be circular. In some other embodiments, the cross-sectional shape of the pore 51 can be a quadrilateral, a pentagon, and the like. It can be understood that, based on the fact that the regular hexagon is the most stable, setting the cross-sectional shape of the pore 51 to a regular hexagon can further enhance the impact resistance of the tray 100.

[0063] In one embodiment, the wall thickness of the pores 51 of the filler 50 is greater than or equal to 0.1 mm and less than or equal to 0.6 mm along the stacking direction perpendicular to the inner shell 20 and the outer shell 10. It can be understood that in this embodiment, the wall thickness of the pores 51 of the filler 50 is set between 0.1 mm and 0.6 mm in the stacking direction perpendicular to the inner shell 20 and the outer shell 10. On the one hand, it can avoid the wall thickness of each pore 51 being too thin and unable to meet the impact resistance requirements of the pallet 100 of the present application; on the other hand, it can avoid the wall thickness of each pore 51 being too thick, resulting in an increase in the weight of the pallet 100 of the present application.

[0064] In one embodiment, the pores 51 of the filler 50 have a diameter greater than or equal to 10 mm and less than or equal to 18 mm. It is understandable that in this embodiment, by setting the diameter of the pores 51 of the filler 50 to be between 10 mm and 18 mm, on the one hand, it is possible to avoid the pores 51 being too small, thereby reducing the porosity 51 ratio of the filler 50, resulting in a smaller ratio of the pores 51 to the solid, thereby causing the weight of the tray 100 of the present application to be too large. On the other hand, it is possible to avoid the pores 51 being too large, thereby affecting the structural strength and impact resistance of the tray 100 of the present application.

[0065] In one embodiment, the material of the filler 50 is aluminum or an aluminum alloy. In this embodiment, based on the advantages of aluminum or aluminum alloy materials such as good thermal conductivity, low density, good ductility, and good weldability, aluminum or aluminum alloy is used to make the filler 50. While ensuring the strength, rigidity, and collision safety requirements of the filler 50, it is also beneficial to optimize the heat dissipation effect of the tray 100 of the present application on the battery, further improve the lightweight effect of the tray 100, and reduce the difficulty of making the filler 50 with a porous 51 structure.

[0066] In one embodiment, the filler 50 is formed by brazing various aluminum sheets together. Specifically, each pore 51 of the filler 50 can be formed by bending at least two aluminum sheets and then brazing them. Figure 6 In the embodiment shown, a bending groove 52 can be formed by bending an aluminum sheet four times. Connecting parts 53 are provided at opposite ends of the bending groove 52. The connecting parts 53 of two aluminum sheets are bonded and brazed to form, and then bonded and brazed with a third aluminum sheet, so as to form a filler 50 with a hexagonal cross section of the pore 51. It can be understood that in this embodiment, brazing is used to form the filler 50 to replace the laser welding in the prior art, which can avoid the structural damage to the filler 50, the inner shell 20 and the outer shell 10 caused by laser welding, and at the same time can reduce the stress concentration caused by welding, and improve the overall flatness of the inner shell 20 and the outer shell 10.

[0067] In one embodiment, the material of the filler 50 can be 3 series aluminum.

[0068] Please see Figures 1 to 3 In one embodiment, the bottom plate of the outer shell 10 is provided with a protrusion 14, that is, the first bottom plate 11 is provided with a protrusion 14, the protrusion 14 extends in a direction away from the second bottom plate 21, and a hollow channel 72 is formed between the protrusion 14 and the second bottom plate 21. By circulating a cooling medium in the channel 72, the heat generated by the battery can be absorbed. That is, the tray 100 of the present application can not only carry and protect the battery, but also absorb the heat generated by the battery. Or it can be understood that the tray 100 of the present application can not only realize the basic function of the tray 100, but also act as a cooler to exchange heat for the battery. The tray 100 and the cooler are arranged as one body, which can improve the energy density of the battery and meet the miniaturized design of the battery pack.

[0069] Furthermore, in one embodiment, the second bottom plate 21 is provided with two openings 24, which are arranged at intervals and are respectively connected to the channel 72, and are also connected to the external cooling pipeline. The two openings 24 are respectively an input port and an output port, and the cooling medium in the cooling pipeline flows from the input port to the channel 72, and after heat exchange with the battery, the cooling medium flows out from the output port.

[0070] It can be understood that in this embodiment, an opening 24 is provided on the bottom plate of the battery, and the opening 24 is connected between the external cooling pipeline and the channel 72 to ensure the fluidity of the cooling medium and ensure that the tray 100 of the present application can continuously achieve the cooling effect on the battery.

[0071] It should be noted that the number of openings 24 in the above embodiment is only for illustrative purposes and does not represent the number of openings 24 in other embodiments of the present application. That is, the number of openings 24 in the present application can be adaptively adjusted according to actual application scenarios, and the present application does not specifically limit this.

[0072] In one embodiment, both the outer shell 10 and the inner shell 20 are made of composite aluminum material. The main part of the outer shell 10 is made of 6-series aluminum, and the inner surface of the outer shell 10 is made of 3-series aluminum; the main part of the inner shell 20 is made of 6-series aluminum, and the outer surface of the inner shell 20 is made of 3-series aluminum. It can be understood that based on the relatively high strength of 6-series aluminum and the better brazing effect of 3-series aluminum, the outer shell 10 and the inner shell 20 are made of a composite material formed by 3-series aluminum and 6-series aluminum, so as to ensure the structural strength of the tray 100 of the present application, and at the same time improve the brazing effect of the outer shell 10 and the inner shell 20.

[0073] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A tray for carrying batteries, characterized in that: The tray includes an outer shell and an inner shell, the inner shell is used to carry the battery, the outer shell is connected to one side of the inner shell along the thickness direction, a cavity is formed between the outer surface of the inner shell and the inner surface of the outer shell, a filler is arranged in the cavity, and the filler is a porous structure.

2. The pallet according to claim 1, characterized in that: Along a direction perpendicular to the stacking direction of the inner shell and the outer shell, the cross-sectional shape of the pores of the filler is hexagonal.

3. The pallet according to claim 1, characterized in that: The pores of the filler extend along the stacking direction of the inner shell and the outer shell.

4. The pallet according to claim 1, characterized in that: Along a direction perpendicular to the stacking direction of the inner shell and the outer shell, the wall thickness of the pores of the filler is greater than or equal to 0.1 mm and less than or equal to 0.6 mm.

5. The pallet according to claim 1, characterized in that: The pore diameter of the filler is greater than or equal to 10 mm and less than or equal to 18 mm.

6. The pallet according to claim 1, characterized in that: The material of the filler is aluminum or an aluminum alloy.

7. The pallet according to claim 6, characterized in that: Each pore of the porous structure is formed by brazing at least two aluminum sheets.

8. The pallet according to claim 1, characterized in that: The filler is fixedly connected to the inner shell and / or the outer shell by brazing.

9. The pallet according to claim 1, characterized in that: A first flange is provided on the outer periphery of the outer shell, and a second flange is provided on the outer periphery of the inner shell. The first flange and the second flange are connected to seal the cavity.

10. The pallet according to any one of claims 1 to 9, characterized in that: The bottom plate of the outer shell is provided with a protrusion, and the protrusion extends in a direction away from the bottom plate of the inner shell, and a hollow channel is formed between the protrusion and the bottom plate of the inner shell.

11. The pallet according to claim 10, characterized in that The bottom plate of the inner shell is provided with at least two openings, the at least two openings are arranged at intervals and are respectively communicated with the channels, and the at least two openings are used to communicate with an external cooling pipeline.

12. The pallet according to any one of claims 1 to 9, characterized in that: The outer shell includes a first bottom plate and a first side wall arranged around the periphery of the bottom plate, the inner shell includes a second bottom plate and a second side wall arranged around the periphery of the second bottom plate, the first side wall and a part of the first bottom plate as well as the second side wall and a part of the second bottom plate cooperate to form the cavity.

13. A battery pack, characterized in that: It comprises a battery, an upper cover and a tray as described in any one of claims 1 to 12, wherein the tray is fixedly connected to the upper cover to form a receiving cavity, and the battery is received in the receiving cavity and carried by the tray.

14. An electrical device, characterized in that: It comprises a functional module and a battery pack as claimed in claim 13, wherein the battery pack is used to provide electrical energy to the functional module.

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