Battery pack and vehicle

Abstract

A battery pack (200) and a vehicle (2000) are disclosed, the battery pack (200) including a battery core (201), a tray bottom plate (10), and a side beam (23), the tray bottom plate (10) has a pressure receiving area (112), within the pressure receiving area (112) is an electrode body pressure receiving area (1121), the side beam main body (231) has a support portion (22), in a first direction of the side beam (23), an orthogonal projection of the support portion (22) and an orthogonal projection of the electrode body pressure receiving area (1121) have an overlapping area, and in a second direction of the side beam (23), an overlapping length between the orthogonal projection of the support portion (22) and the orthogonal projection of the electrode body pressure receiving area (1121) is defined as M1, whereby the relational expression 9 mm≦M1 is satisfied.

Description

【Technical Field】 【0001】 (Cross-reference to Related Applications) This application claims the priority of Chinese Patent Application No. "202220563486X" with the invention title of "Battery Pack and Vehicle" filed by "BW Company Limited" on March 14, 2022. 【0002】 This application relates to the field of battery packs, and particularly to battery packs and vehicles having the battery packs. 【Background Art】 【0003】 In related technologies, a battery pack includes a battery tray, the battery tray includes a frame and a tray bottom plate, the frame and the tray bottom plate are welded and connected to form the battery tray, the tray bottom plate is configured as a plate-like structure and supports a battery core. Since the tray bottom plate mainly supports the weight of the battery core, the tray bottom plate becomes thick, which is disadvantageous for the lightweight design and cost reduction of the battery pack. 【Summary of the Invention】 【0004】 This application aims to solve at least one of the technical problems in the prior art. Therefore, one object of this application is that the tray bottom plate only supports a small part of the weight of the battery core, which is advantageous for the lightweight design and cost reduction of the battery pack, and can reduce the risk that the battery pack becomes inoperable due to vibration, and can guarantee the safety of the battery pack against vibration. That is, to provide a battery pack. 【0005】 This application further provides a vehicle. 【0006】 The battery pack according to the present application includes a battery core, a tray bottom plate, and a side beam, wherein the tray bottom plate has a pressure-receiving region for supporting the battery core, and within the pressure-receiving region there is an electrode pressure-receiving region for supporting the electrode body of the battery core, the side beam has a support portion extending toward the pressure-receiving region, the support portion supports the tray bottom plate, and in the first direction of the side beam, the orthographic projection of the support portion and the orthographic projection of the electrode pressure-receiving region have an overlapping region, and if the overlap length of the orthographic projection of the support portion and the orthographic projection of the electrode pressure-receiving region in the second direction of the side beam is M1, then the relationship 9 mm ≤ M1 is satisfied, and the first direction of the side beam is perpendicular to the second direction of the side beam. 【0007】 According to the battery pack of this invention, by installing a support section and supporting the majority of the battery core's weight mainly with side beams, and supporting only a small portion of the battery core's weight with the tray bottom plate, the thickness of the tray bottom plate can be reduced, which is advantageous for lightweight design and cost reduction of the battery pack. Furthermore, by setting the overlap length between the orthographic projection of the support section and the orthographic projection of the electrode pressure-receiving area to M1, the structural strength of the battery pack can be guaranteed, reducing the risk of the battery pack becoming inoperable due to vibration, and thus guaranteeing the safety of the battery pack against vibration. 【0008】 In some examples of this application, M1 ≤ 300 mm. 【0009】 In some examples of the present application, if M2 is the overlap length in the second direction of the side beam between the orthographic projection of the support portion in the first direction of the side beam and the orthographic projection of the battery core in the first direction of the side beam, and M3 is the length of the battery core, then 0.1 ≤ M2 / M3 ≤ 0.125, and the length direction of the battery core coincides with the second direction of the side beam. 【0010】 In some examples of the present invention, if M2 is the overlap length in the second direction of the side beam between the orthographic projection of the support portion in the first direction of the side beam and the orthographic projection of the pressure-receiving region in the first direction of the side beam, then the relationship 12 mm ≤ M2 ≤ 18 mm is satisfied. 【0011】 In some examples of this application, if the length of the support portion in the second direction of the side beam is M4, then the relationship 45mm ≤ M4 ≤ 70mm is satisfied. 【0012】 In some examples of the present application, the side beam includes a side beam body, the side of the side beam body adjacent to the pressure-receiving region is connected to the support portion, and if the distance between the pressure-receiving region and one end of the support portion away from the pressure-receiving region is M5, then the relationship 33 mm ≤ M5 ≤ 52 mm is satisfied. 【0013】 In some examples of this application, the side beam is constructed as an integrally molded product. 【0014】 In some examples of the present application, the side beam body defines a cavity, the side beam body has a partition, the partition is located within the cavity, and the partition is connected at an angle between the top and bottom walls of the cavity, thereby dividing the cavity into a plurality of sub-cavities. 【0015】 In some examples of the present invention, the plurality of subcavities are arranged sequentially in the second direction of the side beam. 【0016】 In some examples of the present application, the tray bottom plate includes a bottom plate body and an extension, the bottom plate body defining a mounting groove for mounting the battery core, the bottom wall of the mounting groove having the pressure-receiving region, the extension extending along the outer peripheral edge of the bottom plate body, the bottom plate body being attached to the side beam, and in the height direction of the battery pack, the extension being located above the side beam and installed on the side beam. 【0017】 In some examples of the present application, the battery pack further includes a cover, the cover being positioned to cover the open end of the aforementioned mounting groove and defining a mounting cavity on which the battery core is mounted, and the cover being connected to the side beam. 【0018】 In some examples of the present application, there are multiple side beams, and of the multiple side beams, two side beams installed facing each other along the width direction of the battery pack both have the support portion, or two side beams installed facing each other along the length direction of the battery pack both have the support portion. 【0019】 The vehicle relating to this application includes the battery pack described above. 【0020】 Additional aspects and advantages of the present application are, in part, shown in the following description, in part, revealed in the following description, or as can be grasped through the implementation of the present application. [Brief explanation of the drawing] 【0021】 [Figure 1] This is an exploded view of a battery pack according to an embodiment of the present invention. [Figure 2] This is a cross-sectional view of a battery pack according to an embodiment of the present application. [Figure 3] This is a magnified view of portion A in Figure 2. [Figure 4] This is a schematic diagram of the assembly of the battery tray and battery core according to an embodiment of the present invention. [Figure 5] This is a schematic diagram of a battery tray according to an embodiment of the present invention. [Figure 6] This is an exploded view of a battery tray according to an embodiment of the present invention. [Figure 7] This is a schematic diagram of the tray bottom plate of the battery tray according to an embodiment of the present invention. [Figure 8] This is a schematic diagram of the frame of the battery tray according to an embodiment of the present invention. [Figure 9]It is a schematic diagram of a side beam of a battery tray according to an embodiment of the present application. [Figure 10] It is an enlarged view of part B in FIG. 9. [Figure 11] It is an enlarged view of an assembly part of a battery tray and a battery core according to an embodiment of the present application. [Figure 12] It is a cross-sectional view of a side beam according to an embodiment of the present application. [Figure 13] It is a schematic assembly view of a battery core, a tray bottom plate, and a side beam according to an embodiment of the present application. [Figure 14] It is a schematic diagram of a vehicle according to an embodiment of the present application. 【Mode for Carrying Out the Invention】 【0022】 Hereinafter, embodiments of the present application will be described in detail. Examples of the above embodiments are shown in the drawings, and the same or similar reference numerals throughout indicate the same or similar components, or components having the same or similar functions. Hereinafter, the embodiments described with reference to the drawings are exemplary only and should not be understood as limiting the present application. 【0023】 Hereinafter, a battery pack 200 according to an embodiment of the present application will be described with reference to FIGS. 1 to 13. The battery pack 200 includes a battery tray 100 and a battery core 201. The battery tray 100 includes a frame 20 and a tray bottom plate 10. The frame 20 defines an installation space 21, and the bottom plate body 11 of the tray bottom plate 10 is attached to the installation space 21. The frame 20 includes side beams 23, and a plurality of side beams 23 are connected to form the frame 20. The side beam 23 includes a side beam body 231. 【0024】 As shown in Figures 1 to 13, in the battery pack 200 according to the embodiment of the present invention, the tray bottom plate 10 has a pressure-receiving region 112 for supporting the battery core 201. The pressure-receiving region 112 refers to the region where, when the battery core 201 is placed on the tray bottom plate 10, the orthographic projection of the tray bottom plate 10 and the orthographic projection of the battery core 201 overlap in the first direction of the side beam 23. Alternatively, it may be understood as the contact region between the battery core 201 and the tray bottom plate 10 when the battery core 201 is placed on the tray bottom plate 10. The contact region includes the region where the battery core 201 and the tray bottom plate 10 are in direct contact or indirect contact. For example, if there is an adhesive or cooling structure between the battery core 201 and the tray bottom plate 10, the battery core 201 and the tray bottom plate 10 are indirectly in contact. If there is no other object between the battery core 201 and the tray bottom plate 10, the battery core 201 and the tray bottom plate 10 are in direct contact. Alternatively, the pressure-receiving region 112 may be understood as the region where the weight of the battery core 201 directly acts on the tray bottom plate 10. In the first direction of the side beam 23, the orthographic projection of the tray bottom plate 10 is also the projection of the tray bottom plate 10 onto a plane perpendicular to the first direction of the side beam 23. In the first direction of the side beam 23, the orthographic projection of the battery core 201 is also the projection of the battery core 201 onto a plane perpendicular to the first direction of the side beam 23. 【0025】 After the battery core 201 is installed in the battery tray 100, the battery core 201 is placed on the pressure receiving region 112, which has an electrode pressure receiving region 1121 for supporting the electrode body 2011 of the battery core 201. The electrode pressure receiving region 1121 refers to the region where, when the battery core 201 is placed on the tray bottom plate 10, the orthographic projection of the tray bottom plate 10 and the orthographic projection of the electrode body 2011 overlap in the first direction of the side beam 23. The side beam 23 has a support portion 22 that extends toward the pressure-receiving region 112, and the support portion 22 supports the tray bottom plate 10. In the first direction of the side beam 23, the orthographic projection of the support portion 22 and the orthographic projection of the pressure-receiving region 112 have an overlapping region, and the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure-receiving region 1121 also have an overlapping region. If the overlap length of the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure-receiving region 1121 in the second direction of the side beam 23 is M1, then the relationship 9 mm ≤ M1 is satisfied, and the first direction of the side beam 23 is perpendicular to the second direction of the side beam 23. When the battery pack 200 is placed along the mounting direction in Figure 13, the first direction of the side beam 23 refers to the vertical direction in Figure 13, and the second direction of the side beam 23 refers to the left-right direction in Figure 13. In some embodiments, the first direction of the side beam 23 may be the height direction of the side beam 23, or it may coincide with the height direction of the battery pack 200. The second direction of the side beam 23 may be the width direction of the side beam 23, or it may coincide with the width direction or length direction of the battery pack 200. 【0026】 The support portion 22 is installed to support the tray bottom plate 10, and in the first direction of the side beam 23, the orthographic projection of the support portion 22 and the orthographic projection of the electrode pressure receiving area 1121 have an overlapping area, the battery core 201 is supported by the side beam 23, the side beam 23 supports most of the weight of the battery core 201 and the tray bottom plate 10 supports little to no weight of the battery core 201 or only a small portion of the weight of the battery core 201, thereby significantly reducing the load-bearing requirements of the tray bottom plate 10, allowing the support demand for the battery core 201 to be met with a thinner tray bottom plate 10, reducing the thickness of the tray bottom plate 10, and allowing the tray bottom plate 10 to be manufactured from a material with lower strength and thinner thickness. In some preferred embodiments, the tray bottom plate 10 is installed as an insulating member. In some preferred embodiments, the tray bottom plate 10 is installed as a non-metallic component, and a tray bottom plate 10 made of a lightweight non-metallic composite material may be used. For example, the lightweight non-metallic composite material may be made of resin and glass fiber, and the resin may be epoxy resin or polyurethane. However, the present invention is not limited to these, and the lightweight non-metallic composite material may be made of other composite materials that perform the same role as resin and glass fiber. In this way, the weight of the tray bottom plate 10 can be reduced, which is advantageous for the lightweight design of the battery tray 100 and battery pack 200. Furthermore, while conventional tray bottom plates 10 are made of aluminum, in this invention, by manufacturing the tray bottom plate 10 from a non-metallic composite material, the production cost of the tray bottom plate 10 can be reduced, which is advantageous for reducing the production cost of the battery tray 100 and battery pack 200. Moreover, the tray bottom plate 10 made of a non-metallic composite material has excellent electrical insulation performance, and in the event of a serious bottoming-out accident in the vehicle 2000, no high-voltage risk such as arc discharge will occur in the battery pack 200. 【0027】 Furthermore, by setting the overlap length between the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure receiving area 1121 to 9 mm or more in the second direction of the side beam 23, the support portion 22 can better support the electrode body 2011, while ensuring the structural strength of the battery pack 200. This reduces the risk of the electrode body 2011 becoming unusable due to vibration, thereby reducing the risk of the battery pack 200 becoming unusable due to vibration and further ensuring the safety of the battery pack 200 against vibration. Moreover, by setting the overlap length between the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure receiving area 1121 to 9 mm, while ensuring that the support portion 22 reliably supports the electrode body 2011, the amount of material used for the side beam 23 can be minimized, which is advantageous for the lightweight design of the side beam 23 and battery pack 200, and reduces the manufacturing cost of the side beam 23 and battery pack 200. 【0028】 In some embodiments of the present invention, M1 ≤ 300 mm, that is, 9 mm ≤ M1 ≤ 300 mm. In this way, the amount of material required to manufacture the side beam 23 is minimized while ensuring that the battery pack 200 is safe against vibration. This further reduces the risk that the electrode body 2011 may become unusable due to vibration, thus further reducing the risk that the battery pack 200 may become unusable due to vibration. This also ensures that the battery pack 200 is safe against vibration, and the overlap length dimension between the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure receiving region 1121 becomes reasonable. 【0029】 In some embodiments of the present invention, as shown in Figure 13, the battery core 201 is mounted so as to extend in the left-right direction in Figure 13. If M2 is the overlap length in the second direction of the side beam 23 between the orthographic projection of the support portion 22 in the first direction of the side beam 23 and the orthographic projection of the battery core 201 in the first direction of the side beam 23, and M3 is the length of the battery core 201, then 0.1 ≤ M2 / M3 ≤ 0.125, and the length direction of the battery core 201 coincides with the second direction of the side beam 23. In this way, the support area of ​​the support portion 22 that supports the battery core 201 can be guaranteed, and the support portion 22 can reliably support the battery core 201. This further reduces the risk of the battery core 201 becoming inoperable due to vibration, further reduces the risk of the battery pack 200 becoming inoperable due to vibration, and further guarantees the safety of the battery pack 200 against vibration. 【0030】 In some embodiments of the present invention, if M2 is the overlap length in the second direction of the side beam 23 between the orthographic projection of the support portion 22 in the first direction of the side beam 23 and the orthographic projection of the pressure-receiving region 112 in the first direction of the side beam 23, then the relationship 12 mm ≤ M2 ≤ 18 mm is satisfied, and furthermore, M2 is 15 mm. In this way, the support area of ​​the support portion 22 that supports the battery core 201 can be guaranteed, and the support portion 22 can reliably support the battery core 201, thereby further reducing the risk of the battery core 201 becoming unusable due to vibration, further reducing the risk of the battery pack 200 becoming unusable due to vibration, and further guaranteeing the safety of the battery pack 200 against vibration. 【0031】 In some embodiments of the present invention, as shown in Figure 13, if the length of the support portion 22 of the side beam 23 in the second direction is M4, the relationship 45 mm ≤ M4 ≤ 70 mm is satisfied, for example, M4 is 60 mm. In this way, the length dimension of the support portion 22 for supporting the electrode body 2011 in the second direction is ensured, and the risk of the battery core 201 becoming unusable due to vibration can be further reduced, thus making the length dimension of the support portion 22 extending in the second direction reasonable. 【0032】 In some embodiments of the present invention, the side beam 23 includes a side beam body 231, and the side of the side beam body 231 adjacent to the pressure-receiving region 112 is connected to a support portion 22, and if the distance between the pressure-receiving region 112 and one end of the support portion 22 away from the pressure-receiving region (112) is M5, then the relationship 33 mm ≤ M5 ≤ 52 mm is satisfied. When the battery core 201 and the battery tray 100 are placed along the placement direction in Figure 13, the distance between the right end of the battery core 201 and the end of the support portion 22 away from the pressure-receiving area 112 will be described as an example. Let the distance between the right end of the pressure-receiving area 112 and the end of the support portion 22 away from the pressure-receiving area 112 be M5. In this way, after the battery core 201 is placed within the pressure-receiving area 112, it is possible to ensure that there is a sufficient distance between the battery core 201 and the side beam body 231, thereby avoiding collisions between the battery core 201 and the side beam body 231 and improving the safety of use of the battery pack 200. 【0033】 In some embodiments of the present application, as shown in Figures 10 to 13, the side beam body 231 defines the cavity 2311, the side beam body 231 has a partition 232, the partition 232 is located within the cavity 2311, the partition 232 is connected at an angle between the top wall 233 and the bottom wall 234 of the cavity 2311, the partition 232 can divide the cavity 2311 into a plurality of sub-cavities 235, and furthermore, the plurality of sub-cavities 235 may be understood to be arranged sequentially in the second direction of the side beam 23, and also arranged sequentially in the width direction of the side beam 23, and when the battery tray 100 is mounted in the mounting method shown in Figure 11, the width direction of the side beam 23 refers to the left-right direction in Figure 11. 【0034】 The partition portion 232 is connected at an angle between the top wall 233 and the bottom wall 234 of the cavity 2311, and the partition portion 232 is supported between the top wall 233 and the bottom wall 234 of the cavity 2311. This improves the structural strength and rigidity of the side beam 23, improves the structural stability of the side beam body 231, and reduces the risk of deformation of the side beam 23, thereby extending the service life of the side beam 23 and the battery tray 100. Furthermore, by arranging multiple subcavities 235 sequentially in the width direction of the side beam 23, if one of the multiple subcavities 235 that is far from the pressure-receiving area 112 of the battery tray 100 is impacted, for example, if the subcavity 235 located on the left side in Figure 11 is impacted, the impacted subcavity 235 can absorb the impact force, reducing the magnitude of the impact force transmitted into the battery pack 200 and reducing the risk of the battery core 201 inside the battery pack 200 being damaged by impact, thereby improving the safety of use of the battery pack 200. 【0035】 As a result, the side beam 23 of this invention can improve the structural strength, rigidity, and stability of the side beam 23, and reduce the risk of deformation of the side beam 23, thereby extending the service life of the side beam 23 and the battery tray 100. Furthermore, if one of the multiple subcavities 235, which is far from the pressure-receiving area 112 of the battery tray 100, is impacted, the impacted subcavity 235 can absorb the impact force, reducing the magnitude of the impact force transmitted into the battery pack 200, and reducing the risk of the battery core 201 or battery module inside the battery pack 200 being damaged by impact, thereby improving the safety of use of the battery pack 200. 【0036】 In some embodiments of the present invention, as shown in Figures 11 and 12, when the side beam 23 is mounted in the mounting configuration shown in Figure 11, the partition portion 232 may be understood to be installed at an angle away from the pressure-receiving area 112 of the tray bottom plate 10 in the direction from the upper end to the lower end of the side beam 23, and extending at an angle away from the mounting space 21 in the direction from the top to the bottom of the battery tray 100, wherein the partition portion 232 divides the cavity 2311 into two sub-cavities 235, and the two sub-cavities 235 are arranged sequentially in the width direction of the side beam 23, thereby improving the structural strength of the side beam 23 and improving the stability of the side beam 23, thereby improving the ability of the side beam 23 to support the battery core 201 and further reducing the risk of deformation of the frame 20. 【0037】 In some embodiments of the present invention, as shown in Figures 11 and 12, the cross-sectional shape of each subcavity 235 is triangular or trapezoidal, which improves the structural stability of the side beam 23 and further reduces the risk of deformation of the side beam 23, thereby further extending the service life of the side beam 23 and battery tray 100. 【0038】 According to one specific embodiment of the present application, the plurality of subcavities 235 include a first subcavity 2351 and a second subcavity 2352, wherein the first subcavity 2351 is located on the side adjacent to the pressure-receiving area 112 of the second subcavity 2352, the cross-sectional shape of the first subcavity 2351 is triangular, furthermore, the triangle is an isosceles triangle or an equilateral triangle, and the bottom wall 234 of the cavity 2311 constitutes a triangular bottom wall, thereby further improving the structural stability of the side beam 23 and further reducing the risk of deformation of the side beam 23, thus further extending the service life of the side beam 23 and the battery tray 100. 【0039】 In some preferred embodiments, the angle between the bottom wall 234 of the cavity 2311 and the partition 232 is configured as the base angle of a triangle, and if the angle of the base angle is β1, the relationship 50° ≤ β1 ≤ 70° is satisfied, for example, β1 is a value such as 50°, 60°, and 70°. In this way, the structural stability of the side beam 23 can be further improved and the risk of deformation of the side beam 23 can be further reduced, thereby further extending the service life of the side beam 23 and the battery tray 100. 【0040】 In some preferred embodiments, if the vertex angle of the triangle is α1, the relationship 50° ≤ α1 ≤ 70° is satisfied, for example, α1 is a value such as 50°, 60°, or 70°. In this way, the cross-sectional shape of the first subcavity 2351 can be set to an equilateral triangle, thereby further improving the structural stability of the side beam 23 and further reducing the risk of deformation of the side beam 23, thus extending the service life of the side beam 23 and the battery tray 100. 【0041】 According to another specific embodiment of the present application, as shown in Figures 11 and 12, the plurality of subcavities 235 include a first subcavity 2351 and a second subcavity 2352, the first subcavity 2351 is located on the side adjacent to the pressure-receiving region 112 of the second subcavity 2352, the cross-sectional shape of the first subcavity 2351 is set to be trapezoidal, and furthermore, the bottom wall 234 of the cavity 2311 constitutes a trapezoidal bottom wall, the bottom wall 234 of the cavity 2311 The angle between the partition 232 and the side beam 2351 is configured as the base angle of the trapezoid of the first subcavity 2351. If the angle of the base angle is β2, the relationship 50° ≤ β2 ≤ 70° is satisfied, for example, β2 can be a value such as 50°, 60°, or 70°. In this way, the structural stability of the side beam 23 can be further improved and the risk of deformation of the side beam 23 can be further reduced, thereby extending the service life of the side beam 23 and the battery tray 100. 【0042】 In some preferred embodiments, as shown in Figure 12, if α2 is the angle between the two trapezoidal legs of the first subcavity 2351, the relationship 50° ≤ α2 ≤ 70° is satisfied, for example, α2 can be a value such as 50°, 60°, or 70°. In this way, the structural stability of the side beam 23 can be further improved and the risk of deformation of the side beam 23 can be further reduced, thereby extending the service life of the side beam 23 and the battery tray 100. 【0043】 In some embodiments of the present invention, as shown in Figure 12, the cross-sectional shape of the second subcavity 2352 is trapezoidal, the bottom wall 234 of cavity 2311 constitutes the trapezoidal top wall of the second subcavity 2352, and the top wall 233 of cavity 2311 constitutes the trapezoidal bottom wall of the second subcavity 2352. In this way, the structural stability of the side beam 23 can be further improved and the risk of deformation of the side beam 23 can be further reduced, thereby further extending the service life of the side beam 23 and the battery tray 100. 【0044】 In some embodiments of the present application, the side beam 23 is constructed as a single molded product. Furthermore, the side beam 23 may be manufactured from aluminum, or from steel, but the present application is not limited to these, and the side beam 23 may be manufactured from other metallic materials that perform the same function as steel. For example, the side beam 23 may be manufactured from steel, roll-press-formed from steel, or extruded from steel. By making the side beam 23 a single molded product, the load-bearing capacity of the side beam 23 can be improved and the risk of deformation of the side beam 23 can be reduced. 【0045】 As shown in Figures 6 to 13, the tray bottom plate 10 includes a bottom plate body 11 and an extended portion 12. The bottom plate body 11 defines a mounting groove 111 for mounting a battery core 201 or battery module. In this application, the mounting of a battery core 201 in the mounting groove 111 is described as an example. Furthermore, the bottom wall 113 of the mounting groove 111 has a pressure-receiving region 112 for supporting the battery core 201. When the battery core 201 is installed in the battery tray 100, the battery core 201 is located within the pressure-receiving region 112 of the mounting groove 111. The extended portion 12 extends along the periphery of the bottom plate body 11. Furthermore, the extended portion 12 is configured as an annular structure, specifically, as a closed annular structure. 【0046】 The extended portion 12 extends along the outer edge of the base plate body 11, the base plate body 11 is attached to the side beam 23, and in the height direction of the battery pack 200, the extended portion 12 is located above the side beam 23 and installed on the side beam 23. The base plate body 11 is mounted in the mounting space 21, the extended portion 12 is located outside the mounting space 21, and in the height direction of the battery tray 100, the extended portion 12 is located above the frame 20 and installed on the frame 20, and other structures of the extended portion 12 and the frame 20 are also installed in correspondence, the side beam 23 of the frame 20 has a support portion 22 that extends toward the pressure receiving region 112, the support portion 22 supports the tray base plate 10, and further the support portion 22 supports the pressure receiving region 112 of the tray base plate 10. As shown in Figures 6, 8, and 11, in this invention, the battery tray 100 is described as being mounted in the vertical direction. After the base plate body 11 is installed in the mounting space 21, the extension portion 12 is installed outside the mounting space 21. In the vertical direction of the battery tray 100, the extension portion 12 is installed corresponding to the frame 20. Specifically, as shown in Figure 11, the extension portion 12 is located above the frame 20 and is installed facing the frame 20. In the vertical direction of the battery tray 100, the extension portion 12 can shield the entire upper surface of the frame 20. 【0047】 As shown in Figure 11, when the battery core 201 is mounted in the mounting groove 111, the battery core 201 is located within the pressure-receiving region 112, the support portion 22 supports the pressure-receiving region 112, and the weight of the battery core 201 is supported by the frame 20. At the same time, the frame 20 may be formed by metal tailored blank welding. After being formed by welding, only the strength of the welded structure and the required product flatness need to be ensured. Tailored blank welding is highly efficient, improving the production efficiency of the battery tray 100. The tray bottom plate 10 plays a sealing role, eliminating the need for grinding the weld bead and performing airtightness inspections, thus eliminating the risk of sealing failure due to welding. The tray bottom plate 10 may also be press-formed from a composite material. This offers high production efficiency for the tray bottom plate 10, high mold precision, high flatness, and can reduce the dimensional requirements of the battery core 201. 【0048】 Furthermore, in conventional battery trays 100, the two functions of load-bearing capacity and sealing are not distinguished in terms of product structure, and when manufacturing the battery tray 100, it is necessary to consider that the overall load-bearing capacity and sealing requirements are met simultaneously, resulting in low manufacturing efficiency and yield rate of the battery tray 100. In this application, the two functions of load-bearing capacity and sealing are distinguished, with the frame 20 mainly responsible for load-bearing capacity and the tray bottom plate 10 mainly responsible for sealing the battery tray 100, thereby improving the manufacturing efficiency and yield rate of the battery tray 100. 【0049】 As a result, through the cooperation of the tray base plate 10 and the frame 20, the frame 20 supports the majority of the weight of the battery core 201, while the tray base plate 10 supports only a small portion of the weight of the battery core 201. The tray base plate 10 mainly plays the role of sealing, and it is sufficient to use a tray base plate 10 made of a lightweight composite material, which is advantageous for the lightweight design and cost reduction of the battery tray 100 and battery pack 200. Furthermore, after the tray base plate 10 and the frame 20 are assembled as a single unit, there is no risk of sealing failure of the battery tray 100 due to welding, and there is no need to grind the weld beads and perform airtightness testing of the battery tray 100, thus improving the production efficiency of the battery tray 100. 【0050】 In some embodiments of the present invention, as shown in Figure 11, when the battery tray 100 is mounted in the mounting configuration shown in Figure 11, the orthographic projection of the support portion 22 and the orthographic projection of the pressure receiving area 112 have an overlapping area in the height direction of the battery tray 100, and after the battery core 201 is placed in the mounting groove 111, it is possible to ensure that the support portion 22 supports the battery core 201 and that the frame 20 mainly supports the weight of the battery core 201. 【0051】 In some embodiments of the present invention, it may be understood that a pressure-receiving area 112 is formed on the bottom wall 113 of the mounting groove, and the pressure-receiving area 112 is installed on the bottom wall 113 of the mounting groove. As shown in Figure 11, when the battery tray 100 is mounted in the mounting configuration shown in Figure 11, the support portion 22 is located below the bottom plate body 11 and is supported by the bottom wall 113 of the mounting groove. In this way, the support portion 22 is supported below the pressure-receiving area 112, further ensuring that the support portion 22 supports the battery core 201, and further ensuring that the frame 20 mainly supports the weight of the battery core 201, thus making the installation position of the pressure-receiving area 112 reasonable. 【0052】 In some embodiments of the present invention, there are multiple side beams 23, and of the multiple side beams 23, two side beams 23 installed facing each other along the width direction of the battery pack 200 each have a support portion 22, where the width direction of the battery pack 200 refers to the left-right direction in Figure 1, or two side beams 23 installed facing each other along the length direction of the battery pack 200 each have a support portion 22, where the length direction of the battery pack 200 refers to the front-rear direction in Figure 1. The installation position of the support portion 22 becomes rational because it can be ensured that each battery core 201 is supported by the support portion 22, further ensure that the support portion 22 supports the battery core 201, and further ensure that the frame 20 mainly supports the weight of the battery core 201. 【0053】 In some embodiments of the present application, as shown in Figures 6 and 8, the frame 20 may further include a front beam 24 and a rear beam 25, and the side beams 23, front beam 24 and rear beam 25 are interconnected to form a mounting space 21, and the side beams 23 have support portions 22. The number of side beams 23 may be two, and the support portion 22 is provided on at least one of the two side beams 23. The number of rear beams 25 and front beams 24 may each be one, and the interconnection of the two side beams 23, front beam 24 and rear beam 25 includes direct and indirect connections, for example, the connection between a side beam 23 and a front beam 24 may be directly connected, or indirectly connected via other beams. When the frame 20 is mounted in the mounting configuration shown in Figure 8, the two side beams 23 are installed with a gap between them in the left-right direction in Figure 8, and the front beam 24 and rear beam 25 are both connected between the two side beams 23. The front beam 24 and rear beam 25 are installed with a gap between them in the front-rear direction of the frame 20, so that the front beam 24, rear beam 25 and the two side beams 23 together define the mounting space 21. Furthermore, when the battery core 201 is mounted extending along the left-right direction in Figure 8, by installing the support parts 22 on the side beams 23, it is ensured that each battery core 201 is supported by the support parts 22, further ensuring that the support parts 22 support the battery core 201, and further ensuring that the frame 20 mainly supports the weight of the battery core 201, thus making the installation position of the support parts 22 rational. To make it clear, when the battery tray 100 is mounted on the vehicle 2000, the width direction of the battery tray 100 may coincide with the vehicle width direction, and the length direction of the battery tray 100 may coincide with the vehicle length direction. Naturally, the width direction of the battery tray 100 may coincide with the vehicle length direction, and the length direction of the battery tray 100 may coincide with the vehicle width direction. 【0054】 In some embodiments of the present invention, as shown in Figure 8, the frame 20 further includes a support beam 26, the support beam 26 being connected between two side beams 23, or between a front beam 24 and a rear beam 25, or between a front beam 24 and a side beam 23, or between a rear beam 25 and a side beam 23, in which case the structural strength of the frame 20 can be improved, and thus the structural strength of the battery tray 100 can be improved. 【0055】 In some embodiments of the present invention, as shown in Figures 5 and 6, the battery tray 100 further includes an expansion beam 27, which is installed on the side of the tray base plate 10 away from the frame 20, and when the battery tray 100 is placed in the manner shown in Figures 5 and 6, the expansion beam 27 is installed above the tray base plate 10, and the expansion beam 27 is attached to the support beam 26 by bolts, and when the battery core 201 is installed in the mounting groove 111 and then expands, the expansion beam 27 can restrict the position of the battery core 201 and improve the safety of use of the battery core 201. 【0056】 Furthermore, multiple support beams 26 are installed, and these support beams 26 are installed sequentially at intervals along the length direction of the side beams 23, where the length direction of the side beams 23 refers to the front-to-back direction in Figure 6. There are also multiple expansion beams 27, and these expansion beams 27 are installed sequentially at intervals along the length direction of the side beams 23. The multiple expansion beams 27 and the multiple support beams 26 are installed in a one-to-one correspondence, and the expansion beams 27 can be firmly attached to the frame 20 by attaching one expansion beam 27 to one support beam 26 with bolts. 【0057】 In some embodiments of the present invention, as shown in Figure 11, the support portion 22 is installed close to the lower end of the side beam 23, and the support portion 22 is installed close to the end of the side beam 23 away from the tray bottom plate 10. After the bottom plate body 11 is installed in the mounting space 21, the support portion 22 is installed close to the end of the side beam 23 away from the tray bottom plate 10, thereby ensuring that the support portion 22 is supported below the bottom plate body 11, and also ensuring that the bottom plate body 11 is installed in the mounting space 21. 【0058】 In some embodiments of the present invention, as shown in Figures 5 to 7 and Figure 11, when the battery tray 100 is mounted in the mounting configuration shown in Figure 11, the upper end of the mounting groove 111 is left open, allowing the battery core 201 to be inserted into the mounting groove 111 from its open end. The extension portion 12 extends along the open end of the mounting groove 111, and as shown in Figure 11, the extension portion 12 is connected to the upper end of the base plate body 11. After the base plate body 11 is mounted in the mounting space 21, the extension portion 12 is thus positioned outside the mounting groove 111, ensuring that the extension portion 12 is positioned in accordance with the frame 20 in the vertical direction of the battery tray 100, thereby ensuring the sealing of the battery tray 100. 【0059】 In some embodiments of the present invention, as shown in Figures 8, 10, and 11, the surface of the support portion 22 adjacent to the tray bottom plate 10 is configured as a flat surface, that is, as shown in Figure 11, the upper surface of the support portion 22 is set on a flat surface, in this way the support area between the support portion 22 and the bottom plate body 11 can be ensured, and the support portion 22 can better support the battery core 201. 【0060】 In some embodiments of this application, the tray base plate 10 is bonded to the frame 20. Furthermore, by applying an adhesive (e.g., structural adhesive) between the tray base plate 10 and the frame 20, the tray base plate 10 and the frame 20 are bonded together, and by controlling the thickness of the adhesive, dimensional tolerances of the frame 20 are eliminated. In addition, the manufacturing requirements of the tray base plate 10 and the frame 20 are reduced by utilizing the fact that the tray base plate 10 has good flatness and the adhesive can eliminate tolerances. Moreover, when welding the conventional tray base plate 10 and frame 20, the tray base plate 10 is prone to deformation during welding, which increases the dimensional requirements for the battery core 201 during the subsequent assembly of the battery pack 200 and affects the assembly efficiency of the battery pack 200. In this invention, by bonding the tray base plate 10 and the frame 20 together, welding between the tray base plate 10 and the frame 20 is avoided, deformation of the tray base plate 10 can be prevented, the dimensional requirements for the battery core 201 during subsequent assembly of the battery pack 200 can be reduced, and the assembly efficiency of the battery pack 200 can be improved. 【0061】 In some embodiments of the present invention, the tray bottom plate 10 is constructed as an integrally molded product, and the tray bottom plate 10 is press-molded from a lightweight composite material, and during press molding, the resin melts, flows, and hardens, after which the tray bottom plate 10 forms good airtightness, and the mold molding ensures that the tray bottom plate 10 has good flatness and dimensional accuracy, thereby ensuring the sealing function of the tray bottom plate 10. 【0062】 In some embodiments of the present application, the frame 20 is constructed as a metal member, and the frame 20 may be made of aluminum, or the frame 20 may be made of steel, but the present application is not limited thereto, and the frame 20 may be made of other metal materials that perform the same function as steel, for example, the frame 20 may be made of steel, the frame 20 may be roll-press-formed from steel, or the frame 20 may be extruded from steel. By making the frame 20 a metal member, the load-bearing capacity of the frame 20 can be improved and the risk of deformation of the frame 20 can be reduced. 【0063】 In some preferred embodiments, as shown in Figures 10 and 11, in the width direction of the side beam 23, the cavity 2311 has a first side wall 236 positioned away from the mounting groove 111, the first side wall 236 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the first side wall 236 is connected to the partition 232. Furthermore, as shown in Figure 11, a first connecting portion 238 extending into the cavity 2311 is connected to the lower end of the first side wall 236, the first connecting portion 238 is located on the side of the bottom wall 234 of the cavity 2311 toward the top wall 233 of the cavity 2311, the first side wall 236 is connected to the bottom wall 234 and partition portion 232 of the cavity 2311 via the first connecting portion 238, the first connecting portion 238 is fixedly connected to the bottom wall 234 of the cavity 2311, for example, the first connecting portion 238 is welded to the bottom wall 234 of the cavity 2311, in which case the structural strength of the side beam 23 can be further improved and the stability of the side beam 23 can be further improved. 【0064】 In some preferred embodiments, as shown in Figures 10 and 11, in the width direction of the side beam 23, the cavity 2311 has a second side wall 237 adjacent to the mounting groove 111, the second side wall 237 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the second side wall 237 is connected to the partition 232. Furthermore, as shown in Figure 11, a second connecting portion 239 extending into the cavity 2311 is connected to the upper end of the second side wall 237, the second connecting portion 239 is located on the side of the top wall 233 of the cavity 2311 toward the bottom wall 234 of the cavity 2311, the second side wall 237 is connected to the top wall 233 and the partition 232 of the cavity 2311 via the second connecting portion 239, and the second connecting portion 239 is connected to the cavity The top wall 233 of 2311 is fixedly connected, for example, the second connection part 239 is welded to the top wall 233 of the cavity 2311, and the top wall 233 of the cavity 2311, the bottom wall 234 of the cavity 2311, the first side wall 236 and the second side wall 237 together define the cavity 2311, thereby further improving the structural strength of the side beam 23 and further improving the stability of the side beam 23. 【0065】 In some preferred embodiments, as shown in Figures 10 and 11, the second side wall 237 has a support 22 connected to its lower end, and the second side wall 237 is connected to the bottom wall 234 of the cavity 2311 via the support 22. Furthermore, as shown in Figure 12, in the width direction of the side beam 23, the bottom wall 234 of the cavity 2311 has a structural reinforcing portion 2341 that extends below the support portion 22, and the structural reinforcing portion 2341 is connected to the end of the support portion 22 that is close to the tray bottom plate 10, and the structural reinforcing portion 2341 extends below the support portion 22 and may be understood as being connected to the end of the support portion 22 that is close to the mounting space 21, and a boss structure 2391 that protrudes toward the support portion 22 is installed on the structural reinforcing portion 2341 and the boss structure 2391 is connected to the support portion 22, and in this way the structural strength of the side beam 23 can be further improved and the stability of the side beam 23 can be further improved. 【0066】 In some preferred embodiments, the structural reinforcement portion 2341 is provided with a plurality of boss structures 2391, which are arranged sequentially in the width direction of the side beam 23, and at least one of the boss structures 2391 is located below the pressure-receiving region 112, so that the boss structures 2391 can support the battery core 201, further improving the load-bearing capacity of the frame 20 and reducing the risk of deformation of the support portion 22. 【0067】 In some embodiments of the present invention, as shown in Figures 5 and 6, a lug structure 30 is connected to a frame 20, mounting holes are provided in the lug structure 30, and the objective of attaching the battery pack 200 to the vehicle 2000 is achieved by attaching the lug structure 30 to the vehicle 2000 with fasteners (e.g., bolts). 【0068】 In some embodiments of the present invention, as shown in Figures 1 to 11, the battery pack 200 further includes a cover 40. The cover 40 defines a mounting cavity 41 on which the battery core 201 is mounted together with the tray bottom plate 10, and the cover 40 is connected to the side beam 23. Furthermore, the cover 40 is positioned to cover the open end of the mounting groove 111 and define the mounting cavity 41, and an extension 12 is interposed between the cover 40 and the frame 20, and bolts are used to pass through the cover 40, the extension 12 and the frame 20, thereby assembling the cover 40, the tray bottom plate 10 and the frame 20 as a single unit. Furthermore, a sealing member 203 (e.g., a sealing ring) is interposed between the extended portion 12 and the lid 40, and the sealing member 203 can seal the mounting cavity 41, defining a sealed insulating cavity (i.e., mounting cavity 41) between the lid 40 and the tray bottom plate 10, and after the battery core 201 is placed in the mounting cavity 41, the battery core 201 and the frame 20 can be completely isolated, the battery core 201 is in a completely insulated environment, and there is no risk of leakage current to the battery pack 200. 【0069】 In some embodiments of the present invention, as shown in Figure 1, the battery pack 200 may further include a pressing plate 202, the pressing plate 202 being configured as a closed annular structure, the lid 40, the sealing member 203 and the extension 12 being interposed between the pressing plate 202 and the frame 20, and the pressing plate 202, lid 40, tray bottom plate 10 and frame 20 being assembled integrally by bolts passing through the pressing plate 202, lid 40, extension 12 and frame 20, the pressing plate 202 makes the pressure received by the entire sealing member 203 uniform and ensures a secure seal of the mounting cavity 41. 【0070】 The vehicle 2000 according to the embodiment of the present application includes the battery pack 200 of the above embodiment, which is attached to the vehicle 2000 and supplies electrical energy to the vehicle 2000. The frame 20 of the battery pack 200 supports most of the weight of the battery core 201, while the tray bottom plate 10 supports only a small portion of the weight of the battery core 201. The tray bottom plate 10 mainly plays a sealing role, and it is sufficient to use a tray bottom plate 10 made of a lightweight composite material, which is advantageous for the lightweight design and cost reduction of the battery tray 100, battery pack 200, and vehicle 2000. Furthermore, after the tray bottom plate 10 and frame 20 are assembled together, there is no risk of sealing failure of the battery tray 100 due to welding, and there is no need to grind the weld beads and perform airtightness testing of the battery tray 100, thereby improving the production efficiency of the battery tray 100 and vehicle 2000. Furthermore, the tray bottom plate 10, manufactured from composite materials, has excellent electrical insulation properties. In the event of a serious bottoming-out accident involving the vehicle 2000, the battery pack 200 will not experience high-voltage risks such as arc discharge, thereby improving the safety of the vehicle 2000. 【0071】 Furthermore, by setting the overlap length between the orthographic projection of the support portion 22 and the orthographic projection of the electrode body pressure receiving region 1121 to 9 mm or more, the support portion 22 can better support the electrode body 2011, while ensuring the structural strength of the battery pack 200. This reduces the risk of the electrode body 2011 becoming unusable due to vibration, thereby reducing the risk of the battery pack 200 becoming unusable due to vibration and further guaranteeing the safety of the battery pack 200 against vibration. 【0072】 In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described in combination with such embodiment or example are included in at least one embodiment or example of this application. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be appropriately combined in any one or more embodiments or examples. 【0073】 Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and objectives of the present application, and that the scope of the present application is limited by the claims and their equivalents.

Claims

[Claim 1] A battery pack (200) including a battery core (201), a tray bottom plate (10), and a side beam (23), The tray bottom plate (10) has a pressure-receiving region (112) for supporting the battery core (201), and the pressure-receiving region (112) has an electrode pressure-receiving region (1121) for supporting the electrode body (2011) of the battery core (201). The battery pack (200) is characterized in that the side beam (23) has a support portion (22) extending toward the pressure receiving region (112), and a boss structure (2391) connected to the support portion (22), positioned below the support portion, and protruding toward the support portion, the support portion (22) supports the tray bottom plate (10), and in the first direction of the side beam (23), the orthographic projection of the support portion (22) and the orthographic projection of the electrode body pressure receiving region (1121) have an overlapping region, and if the overlap length of the orthographic projection of the support portion (22) and the orthographic projection of the electrode body pressure receiving region (1121) in the second direction of the side beam (23) is M1, then the relationship 9 mm ≤ M1 is satisfied, and the first direction of the side beam (23) is perpendicular to the second direction of the side beam (23). [Claim 2] The battery pack (200) according to claim 1, characterized in that M1 ≤ 300 mm. [Claim 3] The battery pack (200) according to claim 1, characterized in that, if the overlap length in the second direction of the side beam (23) between the orthographic projection of the support portion (22) in the first direction of the side beam (23) and the orthographic projection of the battery core (201) in the first direction of the side beam (23) is M2, and the length of the battery core (201) is M3, then 0.1 ≤ M2 / M3 ≤ 0.125, and the length direction of the battery core (201) coincides with the second direction of the side beam (23). [Claim 4] The battery pack (200) according to claim 1, characterized in that, if M2 is the overlap length in the second direction of the side beam (23) between the orthographic projection of the support portion (22) in the first direction of the side beam (23) and the orthographic projection of the pressure receiving region (112) in the first direction of the side beam (23), then the relationship 12 mm ≤ M2 ≤ 18 mm is satisfied. [Claim 5] The battery pack (200) according to claim 1, characterized in that, if the length of the support portion (22) in the second direction of the side beam (23) is M4, the relationship 45 mm ≤ M4 ≤ 70 mm is satisfied. [Claim 6] The battery pack (200) according to claim 1, wherein the side beam (23) includes a side beam body (231), the side of the side beam body (231) adjacent to the pressure-receiving region (112) is connected to the support portion (22), and if the distance between the pressure-receiving region (112) and one end of the support portion (22) away from the pressure-receiving region (112) is M5, then the relationship 33 mm ≤ M5 ≤ 52 mm is satisfied. [Claim 7] The battery pack (200) according to claim 1, characterized in that the side beam (23) is formed as an integrally molded product. [Claim 8] The battery pack (200) according to claim 6, characterized in that the side beam body (231) defines a cavity (2311), the side beam body (231) has a partition portion (232), the partition portion (232) is located within the cavity (2311), the partition portion (232) is connected at an angle between the top wall (233) and the bottom wall (234) of the cavity (2311), and the cavity (2311) is divided into a plurality of sub-cavities (235). [Claim 9] The battery pack (200) according to claim 8, characterized in that the plurality of subcavities (235) are arranged sequentially in the second direction of the side beam (23). [Claim 10] The battery pack (200) according to claim 1, wherein the tray bottom plate (10) includes a bottom plate body (11) and an extended portion (12), the bottom plate body (11) defines a mounting groove (111) for mounting the battery core (201), the bottom wall (113) of the mounting groove (111) has the pressure receiving region (112), the extended portion (12) extends along the outer peripheral edge of the bottom plate body (11), the bottom plate body (11) is attached to the side beam (23), and in the height direction of the battery pack (200), the extended portion (12) is located above the side beam (23) and installed on the side beam (23). [Claim 11] The battery pack (200) according to 10, further comprising a cover (40), the cover (40) being positioned to cover the open end of the aforementioned mounting groove (111) and defining a mounting cavity (41) on which the battery core (201) is mounted, and the cover (40) being connected to the side beam (23). [Claim 12] The battery pack (200) according to claim 1, characterized in that there are multiple side beams (23), and two of the multiple side beams (23) installed facing each other along the width direction of the battery pack (200) both have the support portion (22), or two of the multiple side beams (23) installed facing each other along the length direction of the battery pack (200) both have the support portion (22). [Claim 13] A vehicle (2000) comprising a battery pack (200) according to any one of claims 1 to 12.

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