Battery tray and battery pack

Abstract

The application provides a battery tray and a battery pack. The battery tray comprises a tray body, a metal plate, a first reinforcing structure, a second reinforcing structure, a cold water plate and a support beam. The tray body comprises a bottom wall. The metal plate is embedded in the interior of the bottom wall. The first reinforcing structure is arranged around the bottom wall, and the first reinforcing structure and the bottom wall define a containing cavity. The second reinforcing structure is arranged on the side of the bottom wall facing the containing cavity and covers the bottom wall. The second reinforcing structure is provided with a plurality of second connecting parts. The cold water plate is arranged on the side of the second reinforcing structure away from the bottom wall, and the cold water plate is fixed with part of the second connecting parts through fasteners. The support beam is arranged on the side of the cold water plate away from the second reinforcing structure, and the two ends of the support beam are respectively abutted against the first reinforcing structures on the opposite sides of the bottom wall. The support beam is fixed with part of the second connecting parts through fasteners. The tray body, the metal plate, the first reinforcing structure and the second reinforcing structure form an integral piece. The battery tray provided by the application has small space requirements, low material cost and assembly cost, and a short production cycle.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery tray and battery pack. Background Technology

[0002] The battery tray is a core structural component of the power battery system of new energy vehicles, and it mainly plays a role in supporting and protecting the battery module.

[0003] Currently, most battery trays are made of sheet metal or aluminum alloy. A reinforcing insulating film is required between the battery tray and the battery, and the battery tray generally needs an independent bottom protective plate to meet regulatory requirements such as bottom impact testing. Battery trays have high space requirements, material costs, and assembly costs, and a long production cycle. Utility Model Content

[0004] This application provides a battery tray that has low space requirements, low material costs, low assembly costs, and a short production cycle.

[0005] In a first aspect, embodiments of this application provide a battery tray, comprising:

[0006] The pallet body, including the bottom wall;

[0007] Metal plate, embedded inside the bottom wall;

[0008] A first reinforcing structure is disposed around the bottom wall, and the first reinforcing structure and the bottom wall define a receiving cavity;

[0009] The second reinforcing structure is disposed on the side of the bottom wall facing the receiving cavity and covers the bottom wall. The second reinforcing structure is provided with multiple second connecting parts.

[0010] A cold water plate is disposed on the side of the second reinforcing structure away from the bottom wall, and the cold water plate is fixed to a portion of the second connecting part by fasteners;

[0011] A support beam is provided on the side of the cold water plate away from the second reinforcing structure, and the two ends of the support beam abut against the first reinforcing structures on opposite sides of the bottom wall; the support beam is fixed to part of the second connecting part by fasteners;

[0012] The pallet body, metal plate, first reinforcing structure and second reinforcing structure are integrated into one piece.

[0013] In one embodiment, the tray body further includes a plurality of sidewalls that are disposed together around a bottom wall, and the bottom wall and the plurality of sidewalls define a receiving cavity;

[0014] The two ends of the support beam abut against two opposite side walls, and the first reinforcing structure surrounds the side of the multiple side walls away from the receiving cavity.

[0015] In one embodiment, each sidewall has an outwardly extending flange at the end away from the bottom wall, and the flange covers the end of the first reinforcing structure.

[0016] In one embodiment, a third reinforcing structure is provided on the side of each sidewall facing the receiving cavity. The third reinforcing structure covers the sidewall, and the tray body, metal plate, first reinforcing structure, second reinforcing structure and third reinforcing structure form an integral piece.

[0017] The third reinforcing structure is provided with multiple third connecting parts, and the ends of the support beam are fixed to the third connecting parts by fasteners.

[0018] In one embodiment, the first reinforcing structure includes a plurality of transverse stiffeners and a plurality of longitudinal stiffeners, which are arranged in a grid pattern.

[0019] In one embodiment, the second reinforcing structure includes reinforcing ribs, the height direction of which is perpendicular to the extension direction of the bottom wall.

[0020] In one embodiment, the reinforcing ribs are arranged in a honeycomb pattern.

[0021] In one embodiment, a flow channel is provided on the side of the cold water plate facing the bottom wall, and a groove is provided on the side of the reinforcing rib facing away from the bottom wall, into which the flow channel extends.

[0022] In one embodiment, the support beam is a rectangular cross-section beam, and the support beam has connecting sections inside, which are respectively connected to the opposite sides of the support beam.

[0023] Secondly, embodiments of this application provide a battery pack including the aforementioned battery tray.

[0024] The battery tray and battery pack provided in this application embodiment have a metal plate embedded in the bottom wall of the tray body. A first reinforcing structure surrounds the bottom wall of the tray body, and a second reinforcing structure is provided on the side of the bottom wall of the tray body facing the receiving cavity, covering the bottom wall of the tray body. A cooling plate is provided on the side of the second reinforcing structure away from the bottom wall, and a support beam is provided on the side of the cooling plate away from the second reinforcing structure. The support beam is fixed to the second connecting part of the second reinforcing structure through a connecting part, and the two ends of the support beam abut against the first reinforcing structure on opposite sides of the bottom wall. The metal plate, the first reinforcing structure, and the second reinforcing structure can ensure the structural strength of the battery tray. The metal plate also allows the battery tray to meet the requirements of bottom ball impact, eliminating the need for a separate bottom protective plate and reducing the space requirements of the battery tray. The tray body, the metal plate, the first reinforcing structure, and the second reinforcing structure form an integral part. The first and second reinforcing structures of the tray body can be made of insulating materials, eliminating the need for an insulating film on the battery tray. Compared with a battery tray made entirely of metal, this reduces the material and assembly costs of the battery tray and shortens the production cycle. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the battery tray provided in an embodiment of this application;

[0027] Figure 2 An exploded view of the battery tray provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the tray body provided in an embodiment of this application;

[0029] Figure 4 A partial cross-sectional view of the tray body provided in an embodiment of this application;

[0030] Figure 5 for Figure 1 A magnified view of a portion of point A in the middle;

[0031] Figure 6 This is a schematic diagram showing the connection between the tray body and the second reinforcing structure provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the second reinforcement structure provided in an embodiment of this application;

[0033] Figure 8 A schematic diagram showing the cooling water plate facing the second reinforcing structure side, provided in an embodiment of this application;

[0034] Figure 9 for Figure 7 A magnified view of a portion of point B in the middle;

[0035] Figure 10 A cross-sectional view of the support beam provided in an embodiment of this application;

[0036] Figure 11 This is a CAE simulation diagram of the battery tray provided in an embodiment of this application;

[0037] Figure 12 This is a CAE simulation diagram of a battery tray in related technologies.

[0038] Figure label:

[0039] 100. Pallet body; 110. Bottom wall; 120. Side wall; 130. Flanged edge;

[0040] 200. Metal sheet;

[0041] 300. First reinforcing structure; 310. Transverse stiffener; 320. Longitudinal stiffener; 330. First connecting part;

[0042] 400. Second reinforcing structure; 410. Reinforcing rib; 411. Groove;

[0043] 500, Cold water plate; 510, Flow channel;

[0044] 600, Support beam; 610, Connecting section. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0049] Currently, most battery trays are made of sheet metal or aluminum alloy, and their manufacturing process is complex and they are heavy. A reinforcing insulating film is required between the battery tray and the battery, and the battery tray generally needs a separate bottom protective plate to meet regulatory requirements such as bottom impact testing. Battery trays have high material and assembly costs and long production cycles.

[0050] To address the aforementioned issues, this application provides a battery tray and battery pack. The battery tray has a metal plate embedded in the bottom wall of its main body. A first reinforcing structure surrounds the bottom wall of the tray body, and a second reinforcing structure is provided on the side of the bottom wall facing the receiving cavity, covering the bottom wall of the tray body. A cooling plate is provided on the side of the second reinforcing structure away from the bottom wall, and a support beam is provided on the side of the cooling plate away from the second reinforcing structure. The support beam is fixed to the second connecting part of the second reinforcing structure via a connecting part, and both ends of the support beam abut against the first reinforcing structures on opposite sides of the bottom wall. The metal plate, the first reinforcing structure, and the second reinforcing structure ensure the structural strength of the battery tray. The metal plate also allows the battery tray to meet the requirements for bottom ball impact testing, eliminating the need for a separate bottom protective plate and reducing the space requirements of the battery tray. The tray body, metal plate, first reinforcing structure, and second reinforcing structure form a single unit. The first and second reinforcing structures of the tray body can be made of insulating material, eliminating the need for an insulating film on the battery tray. Compared to a battery tray made entirely of metal, this significantly reduces material and assembly costs and shortens the production cycle.

[0051] The specific structure of the battery tray and battery pack provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0052] Reference Figures 1 to 4 As shown, this application embodiment provides a battery tray, including a tray body 100, a metal plate 200, a first reinforcing structure 300, a second reinforcing structure 400, a cold water plate 500, and a support beam 600.

[0053] The tray body 100 includes a bottom wall 110, which supports the battery module. Illustratively, the tray body 100 can be made of continuous fiber thermoplastic sheet, which is lightweight, high-strength, heat-resistant, and corrosion-resistant. Compared to sheet metal or aluminum alloy trays in related technologies, the tray body 100 helps reduce the weight of the battery tray while maintaining its structural strength, thus contributing to vehicle weight reduction and ensuring a longer service life. Optionally, the thickness of the continuous fiber thermoplastic sheet can be 5mm.

[0054] The metal plate 200 is embedded inside the bottom wall 110. For example, the metal plate 200 can be a steel plate, the shape and size of which can match the bottom wall 110 of the tray body 100. The metal plate 200 can be embedded in a continuous fiber thermoplastic sheet, which, after the tray body 100 is formed, is located within the bottom wall 110 of the tray body 100. The metal plate 200 can enhance the strength of the bottom wall 110 of the tray body 100. In other words, the metal plate 200 and the bottom wall 110 of the tray body 100 can function as a bottom protective plate in related technologies, enabling the battery tray to meet the requirements for bottom ball impact protection. Therefore, the battery tray does not need a separate bottom protective plate, reducing material costs and space requirements.

[0055] A first reinforcing structure 300 is disposed around the bottom wall 110, and the first reinforcing structure 300 and the bottom wall 110 define a receiving cavity. A second reinforcing structure 400 is disposed on the side of the bottom wall 110 facing the receiving cavity and covers the bottom wall 110, and the second reinforcing structure 400 is provided with multiple second connecting parts. The tray body 100, the metal plate 200, the first reinforcing structure 300 and the second reinforcing structure 400 are formed as a single piece.

[0056] Schematic illustration: After the metal plate 200 is embedded in the continuous fiber thermoplastic sheet, the continuous fiber thermoplastic sheet can be heated and placed into a thermoforming injection mold to form the tray body 100. After the tray body 100 is formed, without opening the mold, the first reinforcing structure 300 and the second reinforcing structure 400 are injection molded. After forming, the mold is opened and the integrated composite structure is removed. At this point, the tray body 100, the metal plate 200, the first reinforcing structure 300, and the second reinforcing structure 400 form a single piece.

[0057] In this design, the opening of the receiving cavity defined by the first reinforcing structure 300 and the bottom wall 110 of the tray body 100 is positioned away from the bottom wall 110 of the tray body 100, allowing the battery module to be inserted into the receiving cavity through the opening. Schematic, the first reinforcing structure 300 may be provided with multiple first connecting parts 330, such as metal insert nuts, which, along with fasteners, enable the external mounting of the battery tray. The first reinforcing structure 300 improves the overall deformation resistance of the battery tray, and the multiple first connecting parts 330 of the first reinforcing structure 300 satisfy functional mounting points and provide partial structural reinforcement. Each second connecting part can also be a metal insert nut. After injection molding, the second connecting parts of the second reinforcing structure 400 form an integral part with the rest of the second reinforcing structure 400. Notably, the second reinforcing structure 400 satisfies the rigidity of the bottom plane of the battery tray and satisfies the functional mounting points.

[0058] A cooling plate 500 is disposed on the side of the second reinforcing structure 400 opposite to the bottom wall 110, and the cooling plate 500 is fixed to a portion of the second connecting part by fasteners. The shape and size of the cooling plate 500 match the bottom wall 110 of the tray body 100. Those skilled in the art will understand that coolant can flow into the cooling plate 500, which can be used to cool the battery module in the receiving cavity. Schematic, fasteners pass through the cooling plate 500 and lock onto the corresponding second connecting part to achieve fixation between the cooling plate 500 and the second reinforcing structure 400.

[0059] The support beam 600 is located on the side of the cold water plate 500 opposite to the second reinforcing structure 400, and its two ends abut against the first reinforcing structures 300 on opposite sides of the bottom wall 110. The support beam 600 is fixed to a portion of the second connecting part by fasteners.

[0060] Optionally, a composite connecting beam can be used as the support beam 600. The support beam 600 can be formed by pultrusion and has the characteristics of high strength and lightweight. For example, the support beam 600 is provided with mounting holes, and the cooling plate 500 is provided with clearance holes. Fasteners can be passed through the mounting holes and clearance holes and locked onto the corresponding second connecting parts to achieve fixation between the cooling plate 500 and the second reinforcing structure 400. The battery module can be positioned on the cooling plate 500 on both sides of the support beam 600.

[0061] The support beam 600 can be customized according to strength requirements, and can then be machined to obtain the required external dimensions and mounting hole positions. There can be one or multiple support beams 600; when there are multiple support beams 600, they can be arranged in parallel at intervals. Understandably, the support beam 600 provides support to the second reinforcing structures 400 on both sides of the pallet body 100, improving the structural strength of the pallet body 100 and increasing the overall integrity of the second reinforcing structures 400 on both sides of the pallet body 100.

[0062] It is worth mentioning that the tray body 100, the first reinforcing structure 300 and the second reinforcing structure 400 are all made of insulating material. There is no need to set an insulating film on the battery tray. Compared with a battery tray made entirely of metal, the battery tray provided in this embodiment is lighter, reducing material costs and assembly costs, and shortening the production cycle.

[0063] The battery tray provided in this embodiment integrates the tray body 100, metal plate 200, first reinforcing structure 300, and second reinforcing structure 400 into a single unit, reducing the number of parts, assembly costs, and material costs. The structure and assembly are simple and reliable. The metal plate 200 strengthens the bottom wall 110 of the tray body 100, and the metal plate 200 and the bottom wall 110 of the tray body 100 function as a bottom protective plate in related technologies. This effectively reduces costs while meeting technical requirements such as bottom ball impact resistance. Injection-molded reinforcing structures and assembly structures can be flexibly arranged on the tray body 100, effectively saving space in the height direction of the battery tray while maintaining the same strength. The highly integrated battery tray efficiently improves and controls the production cycle (approximately one product per 10 minutes).

[0064] Furthermore, the battery tray body 100 is made of continuous fiber thermoplastic board, resulting in significant weight reduction benefits. Compared to existing sheet metal trays, it reduces weight by approximately 45%, and compared to aluminum alloy trays, it reduces weight by approximately 30%. The battery tray also boasts excellent airtightness, thanks to its integral injection molding process, eliminating the risk of weld seams and other process leaks.

[0065] In one embodiment, such as Figures 1-3 As shown, the tray body 100 also includes a plurality of side walls 120, which together surround the bottom wall 110, and the bottom wall 110 and the plurality of side walls 120 define a receiving cavity.

[0066] Indicatively, after the worker embeds the metal plate 200 into the continuous fiber thermoplastic board, the continuous fiber thermoplastic board can be heated and placed into a thermoforming injection mold to form a bottom wall 110 and multiple side walls 120 arranged around the bottom wall 110. When the battery module is placed into the receiving cavity of the tray body 100, the side walls 120 of the tray can limit the position of the battery module.

[0067] The two ends of the support beam 600 abut against the two opposite side walls 120 respectively, and the first reinforcing structure 300 surrounds the side of the multiple side walls 120 away from the receiving cavity.

[0068] Wherein, after the support beam 600 abuts against the two opposite side walls 120 of the pallet body 100, the support beam 600 and the two side walls 120 are supported, which increases the integrity of the two opposite side walls 120 of the pallet body 100. Wherein, after the pallet body 100 is hot-pressed in a hot-press injection mold, it is injection molded in the mold, thereby forming a first reinforcing structure 300 on the side of the multiple side walls 120 away from the receiving cavity.

[0069] In this embodiment, the first reinforcing structure 300 is formed on the side of the multiple sidewalls 120 of the tray body 100 away from the receiving cavity. The sidewalls 120 of the tray body 100 increase the contact area between the tray body 100 and the first reinforcing structure 300, increase the reliability of the connection between the tray body 100 and the first reinforcing structure 300, and ensure that the first reinforcing structure 300 can reliably increase the structural strength of the battery tray.

[0070] In a specific embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, each sidewall 120 has an outwardly extending flange 130 at the end away from the bottom wall 110, and the flange 130 covers the end of the first reinforcing structure 300.

[0071] Schematic, the extension direction of the flange 130 can be parallel to the extension direction of the bottom wall 110 of the pallet body 100. The continuous fiber thermoplastic sheet is hot-pressed in a thermoforming injection mold to form the bottom wall 110, side walls 120, and flange 130 of the pallet body 100. The width of the flange 130 is not greater than the thickness of the second reinforcing structure 400, to prevent the edge of the flange 130 from extending beyond the second reinforcing structure 400.

[0072] The flange 130 can improve the structural strength of the tray body 100, thereby further improving the structural strength of the battery tray. In addition, the flange 130 further increases the contact area between the tray body 100 and the second reinforcing structure 400, thereby further improving the reliability of the connection between the tray body 100 and the second reinforcing structure 400.

[0073] In one possible implementation, each sidewall 120 is provided with a third reinforcing structure on the side facing the receiving cavity, the third reinforcing structure covering the sidewall 120, and the tray body 100, metal plate 200, first reinforcing structure 300, second reinforcing structure 400 and third reinforcing structure form an integral piece.

[0074] For example, the third reinforcing structure may include multiple reinforcing ribs. After the continuous fiber thermoplastic sheet is thermopressed in a thermoforming injection mold to form the pallet body 100, the first reinforcing structure 300, the second reinforcing structure 400, and the third reinforcing structure are injection molded without opening the thermoforming injection mold. After injection molding, the first reinforcing structure 300, the second reinforcing structure 400, the third reinforcing structure, and the metal plate 200 in the pallet body 100 form a single integral part.

[0075] The third reinforcing structure has multiple third connecting parts, and the ends of the support beam 600 are fixed to the third connecting parts by fasteners. The third connecting parts can be metal insert nuts, and the two ends of the support beam 600 can be respectively provided with limiting parts. After the support beam 600 is connected to the second reinforcing structure 400, bolts can be passed through the limiting parts and locked onto the corresponding third connecting parts. The above arrangement allows the ends of the support beam 600 to reliably support the side wall 120 of the pallet body 100.

[0076] like Figure 1 , Figure 2 and Figure 5 As shown, in one possible implementation, the first reinforcing structure 300 includes a plurality of transverse reinforcing ribs 310 and a plurality of longitudinal reinforcing ribs 320, which are arranged in a grid pattern.

[0077] Schematic illustration: Each transverse reinforcing rib 310 and each longitudinal reinforcing rib 320 is a sheet-like structure. The transverse reinforcing ribs 310 and 320 can be formed by injection molding. The extending direction of the transverse reinforcing ribs 310 is parallel to the extending direction of the bottom wall 110 of the tray body 100, and the extending direction of the longitudinal reinforcing ribs 320 is perpendicular to the extending direction of the transverse reinforcing ribs 310. The height of each transverse reinforcing rib 310 and each longitudinal reinforcing rib 320 can be 5mm. This embodiment does not limit the number of transverse reinforcing ribs 310 and longitudinal reinforcing ribs 320; those skilled in the art can set them according to actual needs.

[0078] In this embodiment, the multiple transverse reinforcing ribs 310 and multiple longitudinal reinforcing ribs 320 of the first reinforcing structure 300 can ensure the structural strength of the first reinforcing structure 300, and the first reinforcing structure 300 can reliably improve the structural strength of the battery tray.

[0079] In one embodiment, such as Figure 2 , Figure 6 and Figure 7 As shown, the second reinforcing structure 400 includes a reinforcing rib 410, the height direction of which is perpendicular to the extension direction of the bottom wall 110.

[0080] For example, the height of the reinforcing rib 410 can be 6 mm. The reinforcing rib 410 can be formed by injection molding on the side of the bottom wall 110 of the pallet body 100 facing the interior of the receiving cavity. In one possible implementation, there can be multiple reinforcing ribs 410, which are arranged in an array on the bottom wall 110 of the pallet body 100.

[0081] In this embodiment, the second reinforcing structure 400 improves the structural strength of the bottom wall 110 of the tray body 100 through the reinforcing ribs 410, further ensuring that the battery tray meets the requirements for bottom ball impact.

[0082] In a specific embodiment, such as Figure 2 , Figure 6 , Figure 7 and Figure 9 As shown, the reinforcing ribs 410 are arranged in a honeycomb pattern.

[0083] Specifically, the reinforcing ribs 410 form multiple arrayed hexagons on the bottom wall 110 of the tray body 100, with each hexagon being of equal size. Those skilled in the art can set the size of each hexagon formed by the reinforcing ribs 410 as needed, and no unique limitation is made here.

[0084] In this embodiment, the second reinforcing structure 400 can withstand loads in all directions. The second reinforcing structure 400 has good resistance to deformation and torsion, thereby reliably improving the structural strength of the battery tray.

[0085] In other embodiments, the second reinforcing structure 400 includes a plurality of first reinforcing ribs 410 and a plurality of second reinforcing ribs 410 arranged in parallel with each other. The first reinforcing ribs 410 and the second reinforcing ribs 410 extend in different directions, and the plurality of first reinforcing ribs 410 and the plurality of second reinforcing ribs 410 form a mesh structure.

[0086] In a specific embodiment, such as Figures 7-9 As shown, a flow channel 510 protrudes from the side of the cold water plate 500 facing the bottom wall 110, and a groove 411 is provided on the side of the reinforcing rib 410 away from the bottom wall 110, with the flow channel 510 extending into the groove 411.

[0087] The flow channel 510 protrudes from the main body of the cooling plate 500. During use, coolant can be introduced into the flow channel 510 to cool the cooling plate 500, thereby reducing the temperature of the battery module. The size of the groove 411 on the reinforcing rib 410 matches that of the flow channel 510. When the flow channel 510 extends into the groove 411 of the reinforcing rib 410, the second reinforcing structure 400 can limit the cooling plate 500, facilitating the use of fasteners to fix the cooling plate 500 to the second connection part of the second reinforcing structure 400.

[0088] In this embodiment, the groove 411 on the reinforcing rib 410 can also avoid the flow channel 510 of the cold water plate 500, so that the cold water plate 500 can be stably set on the second reinforcing structure 400, avoiding interference between the cold water plate 500 and the second reinforcing structure 400.

[0089] In one embodiment, such as Figure 1 , Figure 2 and Figure 10As shown, the support beam 600 is a rectangular cross-section beam, and the support beam 600 has a connecting section 610 inside, which is connected to the opposite sides of the support beam 600 respectively.

[0090] Specifically, the support beam 600 has a rectangular cross-section and an internal cavity. The connecting section 610 can be a sheet structure, integrally molded within the support beam 600. Multiple connecting sections 610 can be arranged in parallel at intervals. The connecting sections 610 increase the structural strength of the support beam 600, reliably enhancing the structural strength of the battery tray and further increasing the overall integrity of the second reinforcing structures 400 on both sides of the tray body 100.

[0091] The following is a brief description of the battery tray production process so that those skilled in the art can better understand the technical solution of this embodiment.

[0092] Step 1: Use special equipment (steel strip machine) to hot press a 1mm metal plate 200 into a 5mm continuous fiberboard;

[0093] Step 2: Heat the sheet material, place it into a hot-press injection mold, and hot-press it to form the continuous fiber sheet material into the tray body 100;

[0094] Step 3: Without opening the hot press injection mold, injection mold the first reinforcing structure 300 and the second reinforcing structure 400. After molding, open the mold and take out the integrated composite structure. At this time, the metal plate 200 acts as the bottom protective plate.

[0095] Step 4: Screw the cooling water plate 500 onto the side of the second reinforcing structure 400 opposite to the bottom wall 110 of the battery tray. The cooling water plate 500 assembly is an externally supplied component and is assembled with the second reinforcing structure 400. Use bolts to secure the cooling water plate 500 to the second connection portion of the second reinforcing structure 400, ensuring a reliable and secure connection.

[0096] Step 5: Install the support beam 600 to complete the battery tray assembly. The support beam 600 is a custom-made pultruded profile based on strength requirements. It can be machined to achieve the necessary external dimensions and mounting hole positions. The support beam 600 is characterized by high strength and lightweight. Bolts are used to secure the support beam 600 to the second connection part of the second reinforcing structure 400. The support beam 600 increases the integrity of the two side walls 120 of the tray body 100.

[0097] CAE simulations were performed to compare the battery tray provided in this embodiment and the aluminum tray in related technologies to verify the comparison of the ball impact penetration (impact energy 150J) between the two battery trays. The comparison results are as follows: Figure 11 and Figure 12 As shown.

[0098] The maximum deformation of the battery tray provided in this embodiment is 13.19 mm, which is less than the deformation of the aluminum tray in the related technology (14.83 mm), thus meeting the relevant requirements. The battery tray provided in this embodiment is superior to the aluminum tray in the related technology.

[0099] This application also provides a battery pack, including the aforementioned battery tray. The battery pack further includes a battery module disposed within the receiving cavity of the battery tray.

[0100] The battery pack provided in this application has lower space requirements, lower material and assembly costs, and a shorter production cycle due to the use of the aforementioned battery tray.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery tray, characterized in that, include: The pallet body, including the bottom wall; A metal plate is embedded inside the bottom wall; A first reinforcing structure is disposed around the bottom wall, and the first reinforcing structure and the bottom wall define a receiving cavity; A second reinforcing structure is disposed on the side of the bottom wall facing the receiving cavity and covers the bottom wall. The second reinforcing structure is provided with a plurality of second connecting portions. A cold water plate is disposed on the side of the second reinforcing structure opposite to the bottom wall, and the cold water plate is fixed to a portion of the second connecting part by fasteners; A support beam is disposed on the side of the cold water plate away from the second reinforcing structure, and the two ends of the support beam abut against the first reinforcing structures on opposite sides of the bottom wall; the support beam is fixed to a portion of the second connecting part by fasteners; The tray body, the metal plate, the first reinforcing structure, and the second reinforcing structure are formed as a single unit.

2. The battery tray according to claim 1, characterized in that, The tray body also includes a plurality of side walls, which together surround the bottom wall, and the bottom wall and the plurality of side walls define the receiving cavity; The two ends of the support beam abut against the two opposite sidewalls, and the first reinforcing structure surrounds the sidewalls on the side away from the receiving cavity.

3. The battery tray according to claim 2, characterized in that, Each of the sidewalls has an outwardly extending flange at the end away from the bottom wall, and the flange covers the end of the first reinforcing structure.

4. The battery tray according to claim 2, characterized in that, Each of the sidewalls is provided with a third reinforcing structure on the side facing the receiving cavity. The third reinforcing structure covers the sidewall. The tray body, the metal plate, the first reinforcing structure, the second reinforcing structure and the third reinforcing structure form an integral piece. The third reinforcing structure is provided with multiple third connecting parts, and the end of the support beam is fixed to the third connecting parts by fasteners.

5. The battery tray according to claim 1, characterized in that, The first reinforcing structure includes a plurality of transverse reinforcing ribs and a plurality of longitudinal reinforcing ribs, wherein the plurality of transverse reinforcing ribs and the plurality of longitudinal reinforcing ribs are arranged in a grid pattern.

6. The battery tray according to claim 1, characterized in that, The second reinforcing structure includes reinforcing ribs, the height of which is perpendicular to the extension direction of the bottom wall.

7. The battery tray according to claim 6, characterized in that, The reinforcing ribs are arranged in a honeycomb pattern.

8. The battery tray according to claim 6, characterized in that, The cold water plate has a flow channel protruding on the side facing the bottom wall, and the reinforcing rib has a groove on the side facing away from the bottom wall, with the flow channel extending into the groove.

9. The battery tray according to claim 1, characterized in that, The support beam is a rectangular cross-section beam, and the support beam has connecting sections inside, which are respectively connected to the opposite sides of the support beam.

10. A battery pack, characterized in that, The battery tray includes any one of claims 1-9.

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