Side beam for battery tray, battery tray, battery pack, and vehicle

Abstract

The present invention discloses a side beam for a battery tray, a battery tray, a battery pack, and a vehicle. The side beam includes: a side beam body that defines a cavity. The side beam body has a partition portion located within the cavity. The partition portion is connected between the top wall and the bottom wall of the cavity to divide the cavity into a plurality of sub-cavities. The plurality of sub-cavities are arranged in sequence in the width direction of the side beam. From the upper end to the lower end of the side beam, the partition portion is inclined in a direction away from the placement groove. Thus, through the side beam body of the present application, the structural strength, stiffness, and stability of the side beam can be improved, the risk of side beam deformation can be reduced, thereby the service life of the side beam and the battery tray can be extended. Moreover, when the sub-cavity far from the placement groove of the battery tray among the plurality of sub-cavities is impacted, the impacted sub-cavity can absorb the collision force, reducing the magnitude of the collision force transmitted to the inside of the battery pack, thereby improving the safety of the battery pack during use.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a side beam for a battery tray, a battery tray, a battery pack, and a vehicle. Background Art

[0002] In the related art, a battery pack includes a battery tray, the battery tray includes a frame, the frame includes side beams, and the structural strength of the side beams is insufficient and the stability is poor, resulting in easy deformation of the side beams, affecting the service life of the side beams. Moreover, when the side beams are impacted, the collision force transmitted to the inside of the battery pack is relatively large, and the risk of damage to the battery cells inside the battery pack is high, affecting the safety of use of the battery pack. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a side beam for a battery tray, the side beam of the battery tray having good structural strength, stiffness, and stability, reducing the risk of deformation of the side beam, thereby extending the service life of the side beam and the battery tray. Moreover, when the side beam of the battery tray is impacted, the magnitude of the collision force transmitted to the inside of the battery pack is reduced, and the risk of damage to the battery cells inside the battery pack can be reduced, thereby improving the safety of use of the battery pack.

[0004] The present invention further provides a battery tray.

[0005] The present invention further provides a battery pack.

[0006] The present invention further provides a vehicle.

[0007] According to the side beam of the battery tray of the present invention, the battery tray has a placement groove for placing battery cells, and the side beam includes: a side beam body, the side beam body defining a cavity, the side beam body having a partition portion, the partition portion being located inside the cavity, the partition portion being connected between the top wall and the bottom wall of the cavity to divide the cavity into a plurality of sub-cavities, the plurality of sub-cavities being arranged in sequence in the width direction of the side beam. Among them, in the direction from the upper end to the lower end of the side beam, the partition portion is inclined away from the placement groove.

[0008] According to the side beam of the battery tray of the present invention, the structural strength, stiffness, and stability of the side beam can be improved, the risk of deformation of the side beam can be reduced, thereby extending the service life of the side beam and the battery tray. Moreover, when the sub-cavity far from the placement groove among the plurality of sub-cavities is impacted, the impacted sub-cavity can absorb the collision force, reducing the magnitude of the collision force transmitted to the inside of the battery pack, and the risk of damage to the battery cells inside the battery pack can be reduced, thereby improving the safety of use of the battery pack.

[0009] In some examples of the present invention, in the width direction of the side beam, the cavity has a first side wall disposed away from the placement groove, the first side wall is connected between the top wall and the bottom wall of the cavity, and the first side wall is connected to the partition portion.

[0010] In some examples of the present invention, the cavity has a second side wall close to the placement groove, the second side wall is connected between the top wall and the bottom wall of the cavity, and the second side wall is connected to the partition portion. In the direction from the upper end to the lower end of the side beam, the second side wall is inclined toward the direction close to the placement groove.

[0011] In some examples of the present invention, the cross-sectional shape of each of the sub-cavities is triangular or trapezoidal.

[0012] In some examples of the present invention, the plurality of sub-cavities include: a first sub-cavity and a second sub-cavity. The first sub-cavity is located on a side of the second sub-cavity close to the placement groove. The cross-sectional shape of the first sub-cavity is triangular or trapezoidal, and / or the cross-sectional shape of the second sub-cavity is trapezoidal.

[0013] In some examples of the present invention, the triangle is an isosceles triangle or an equilateral triangle.

[0014] In some examples of the present invention, the included angle between the bottom wall of the cavity and the partition portion is β, satisfying the relational expression: 50° ≤ β ≤ 70°.

[0015] In some examples of the present invention, the included angle between the second side wall and the partition portion is α, satisfying the relational expression: 50° ≤ α ≤ 70°.

[0016] In some examples of the present invention, a first connecting portion extending toward the inside of the cavity is connected to the lower end of the first side wall. The first connecting portion is located on a side of the bottom wall of the cavity facing the top wall of the cavity. The first side wall is connected to the bottom wall and the partition portion of the cavity through the first connecting portion, and the first connecting portion is fixedly connected to the bottom wall of the cavity;

[0017] A second connecting portion extending toward the inside of the cavity is connected to the upper end of the second side wall. The second connecting portion is located on a side of the top wall of the cavity facing the bottom wall of the cavity. The second side wall is connected to the top wall and the partition portion of the cavity through the second connecting portion, and the second connecting portion is fixedly connected to the top wall of the cavity;

[0018] The top wall of the cavity, the bottom wall of the cavity, the first side wall and the second side wall jointly define the cavity.

[0019] In some examples of the present invention, the side beam includes a support portion provided on one side of the side beam body close to the placement groove, and the support portion is used to support the battery cell.

[0020] In some examples of the present invention, the side beam is configured as an integrally formed part.

[0021] The battery tray according to the present invention includes the above-mentioned side beam for the battery tray.

[0022] The battery tray according to the present invention includes: a tray bottom plate, the tray bottom plate includes a bottom plate body and an extension portion, the bottom plate body defines a placement groove for placing the battery cell, and the extension portion extends along the circumferential edge of the bottom plate body; a frame, the frame includes a first side beam, a second side beam, a third side beam and a fourth side beam, at least one of the first side beam and the second side beam is the side beam, the first side beam and the second side beam are arranged opposite to each other in a first direction, the third side beam and the fourth side beam are arranged opposite to each other in a second direction, the first side beam, the second side beam, the third side beam and the fourth side beam are connected to form an installation space, the bottom plate body is installed in the installation space, in the height direction of the battery tray, the extension portion is located above the frame and is provided on the frame, the first side beam and / or the second side beam has a support portion, and the support portion is used to support the tray bottom plate, wherein one of the first direction and the second direction is the length direction of the battery tray, and the other is the width direction of the battery tray.

[0023] The battery pack according to the present invention includes: a battery cell; a battery tray, the battery tray is the above-mentioned battery tray, and the battery tray has a placement groove, and the battery cell is placed in the placement groove.

[0024] The vehicle according to the present invention includes the above-mentioned battery pack.

[0025] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is an exploded view of a battery pack according to an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a battery pack according to an embodiment of the present invention;

[0029] Figure 3 isFigure 2 Enlarged view of area A;

[0030] Figure 4 Assembly schematic diagram of a battery tray and a battery cell according to an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of a battery tray according to an embodiment of the present invention;

[0032] Figure 6 Exploded view of a battery tray according to an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the tray bottom plate of a battery tray according to an embodiment of the present invention;

[0034] Figure 8 Schematic diagram of the frame of a battery tray according to an embodiment of the present invention;

[0035] Figure 9 Schematic diagram of the side beam of a battery tray according to an embodiment of the present invention;

[0036] Figure 10 Is Figure 9 Enlarged view of area B;

[0037] Figure 11 Partial enlarged view of the assembly of a battery tray and a battery cell according to an embodiment of the present invention;

[0038] Figure 12 Cross-sectional view of a side beam according to an embodiment of the present invention.

[0039] Reference numerals:

[0040] Battery tray 100;

[0041] Tray bottom plate 10;

[0042] Bottom plate body 11; Placement groove 111; Compression area 112; Bottom wall of the placement groove 113;

[0043] Extension part 12;

[0044] Frame 20; Installation space 21; Support part 22;

[0045] Side beam 23; Side beam body 231; Partition part 232; Top wall of the cavity 233; Bottom wall of the cavity 234;

[0046] Sub-cavity 235; First sub-cavity 2351; Second sub-cavity 2352;

[0047] First side wall 236; Second side wall 237; First connecting part 238; Second connecting part 239; Boss structure 2391;

[0048] Front beam 24; rear beam 25; support beam 26; expansion beam 27;

[0049] Lug structure 30; cover body 40; placement cavity 41;

[0050] Battery pack 200; battery cell 201; pressing plate 202; seal 203. Specific embodiments

[0051] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0052] Reference will be made below Figures 1 - 12 to describe the side beam 23 for the battery tray 100 according to an embodiment of the present invention. A plurality of side beams 23 are configured as the frame 20 of the battery tray 100, and the battery tray 100 is applied to the battery pack 200.

[0053] As Figures 1 - 12 shown, for the side beam 23 according to an embodiment of the present invention, the side beam 23 includes a side beam body 231. The side beam body 231 defines a cavity. The side beam body 231 has a partition 232. The partition 232 is located in the cavity. The partition 232 is connected between the top wall 233 and the bottom wall 234 of the cavity. Further, the partition 232 is obliquely connected between the top wall 233 and the bottom wall 234 of the cavity. The partition 232 can divide the cavity into a plurality of sub-cavities 235. The plurality of sub-cavities 235 are arranged in sequence in the width direction of the side beam 23. When the battery tray 100 is placed in the Figure 11 placement manner, the width direction of the side beam 23 refers to the Figure 11 left-right direction in the

[0054] In some embodiments, the width direction of the side beam 23 may be the same as the width direction of the battery tray 100 or the width direction of the vehicle. In other embodiments, the width direction of the side beam 23 may be the same as the length direction of the battery tray 100 or the length direction of the vehicle. Among them, by obliquely connecting the partition 232 between the top wall 233 and the bottom wall 234 of the cavity, the partition 232 is supported between the top wall 233 and the bottom wall 234 of the cavity, which can improve the structural strength and stiffness of the side beam body 231, and can also improve the structural stability of the side beam body 231, reduce the risk of deformation of the side beam 23, and thus can extend the service life of the side beam 23 and the battery tray 100. And, by arranging the plurality of sub-cavities 235 in sequence in the width direction of the side beam 23, when the sub-cavity 235 far from the placement groove 111 in the plurality of sub-cavities 235 is impacted, for example: located inFigure 11 When the sub - cavity 235 on the left side in the figure is impacted, the impacted sub - cavity 235 can absorb the collision force, reducing the magnitude of the collision force transmitted to the inside of the battery pack 200, and can reduce the risk of the battery cells 201 in the battery pack 200 being damaged, thereby improving the safety of using the battery pack 200.

[0055] Thus, through the side - beam body 231 of the present application, the structural strength, stiffness and stability of the side - beam 23 can be improved, the risk of deformation of the side - beam 23 can be reduced, thereby extending the service life of the side - beam 23 and the battery tray 100. Moreover, when the sub - cavity 235 far from the placement groove 111 among the multiple sub - cavities 235 is impacted, the impacted sub - cavity 235 can absorb the collision force, reducing the magnitude of the collision force transmitted to the inside of the battery pack 200, and can reduce the risk of the battery cells 201 or the battery module in the battery pack 200 being damaged, thereby improving the safety of using the battery pack 200.

[0056] And, as Figure 11 and Figure 12 shown, when the side - beam 23 is placed in the placement manner in Figure 11 , from the upper end to the lower end direction of the side - beam 23, the partition part 232 is inclined away from the placement groove 111. It can also be understood that the partition part 232 is inclined away from the placement groove 111 of the battery tray 100. It can also be understood that from the upper - side to the lower - side direction of the battery tray 100, the partition part 232 extends obliquely away from the placement groove 111. The partition part 232 divides the cavity into two sub - cavities 235, and the two sub - cavities 235 are arranged in sequence in the width direction of the side - beam 23. Such a setting can improve the structural strength of the side - beam 23, improve the stability of the side - beam 23, thereby enhancing the ability of the side - beam 23 to support the battery cells 201, and can also further reduce the risk of deformation of the frame 20.

[0057] In some embodiments of the present invention, as Figure 11 and Figure 12 shown, the cross - sectional shape of each sub - cavity 235 is triangular or trapezoidal. Such a setting can improve the structural stability of the side - beam 23, further reduce the risk of deformation of the side - beam 23, thereby further extending the service life of the side - beam 23 and the battery tray 100.

[0058] In some embodiments of the present invention, as Figure 10 and Figure 11 shown, in the width direction of the side - beam 23, the cavity has a first side - wall 236 arranged away from the placement groove 111. The first side - wall 236 is connected between the top - wall 233 and the bottom - wall 234 of the cavity, and the first side - wall 236 is connected to the partition part 232. Further, as Figure 11As shown, a first connecting portion 238 extending toward the inside of the cavity 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 facing the top wall 233 of the cavity. The first side wall 236 is connected to the bottom wall 234 and the partition portion 232 of the cavity through the first connecting portion 238, and the first connecting portion 238 is fixedly connected to the bottom wall 234 of the cavity. For example, the first connecting portion 238 is welded to the bottom wall 234 of the cavity. Such a setting can further improve the structural strength of the side beam 23 and can further improve the stability of the side beam 23.

[0059] Further, as Figure 10 and Figure 11 shown, in the width direction of the side beam 23, the cavity has a second side wall 237 close to the placement groove 111. The second side wall 237 is connected between the top wall 233 and the bottom wall 234 of the cavity, and the second side wall 237 is connected to the partition portion 232. From the upper end to the lower end direction of the side beam 23, the second side wall 237 is inclined toward the direction close to the placement groove 111. Further, as Figure 11 shown, a second connecting portion 239 extending toward the inside of the cavity 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 facing the bottom wall 234 of the cavity. The second side wall 237 is connected to the top wall 233 and the partition portion 232 of the cavity through the second connecting portion 239, and the second connecting portion 239 is fixedly connected to the top wall 233 of the cavity. For example, the second connecting portion 239 is welded to the top wall 233 of the cavity. The top wall 233, the bottom wall 234, the first side wall 236, and the second side wall 237 of the cavity jointly define the cavity. Such a setting can further improve the structural strength of the side beam 23 and can further improve the stability of the side beam 23.

[0060] Further, as Figure 12 shown, the included angle between the bottom wall 234 of the cavity and the partition portion 232 is β, satisfying the relational expression: 50° ≤ β ≤ 70°. Further, the included angle between the second side wall 237 and the partition portion 232 is α, satisfying the relational expression: 50° ≤ α ≤ 70°. Such a setting can improve the structural stability of the side beam 23, reduce the deformation risk of the side beam 23, and thus can extend the service life of the side beam 23 and the battery tray 100.

[0061] The plurality of sub-cavities 235 include: a first sub-cavity 2351 and a second sub-cavity 2352. In the width direction of the side beam 23, the first sub-cavity 2351 is located on the side of the second sub-cavity 2352 close to the placement groove 111. The cross-sectional shape of the first sub-cavity 2351 is triangular or trapezoidal, and / or the cross-sectional shape of the second sub-cavity 2352 is trapezoidal.

[0062] Further, according to a specific embodiment of the present invention, the plurality of sub-cavities 235 include: a first sub-cavity 2351 and a second sub-cavity 2352. In the width direction of the side beam 23, the first sub-cavity 2351 is located on the side closer to the placement groove 111 of the second sub-cavity 2352. The cross-sectional shape of the first sub-cavity 2351 is triangular. Further, the triangle is an isosceles triangle or an equilateral triangle, and the bottom wall 234 of the cavity constitutes the bottom wall of the triangle. Such a setting can further improve the structural stability of the side beam 23, further reduce the risk of deformation of the side beam 23, and thus can further extend the service life of the side beam 23 and the battery tray 100.

[0063] Further, the included angle between the bottom wall 234 of the cavity and the partition 232 is configured as the base angle of the triangle, and the angle of the base angle is β, satisfying the relation: 50° ≤ β ≤ 70°. Preferably, β is 60°. Such a setting can further improve the structural stability of the side beam 23, further reduce the risk of deformation of the side beam 23, and thus can further extend the service life of the side beam 23 and the battery tray 100.

[0064] Further, the apex angle of the triangle is α, satisfying the relation: 50° ≤ α ≤ 70°. Preferably, α is 60°. Such a setting can set the cross-sectional shape of the first sub-cavity 2351 as an equilateral triangle, which can further improve the structural stability of the side beam 23, further reduce the risk of deformation of the side beam 23, and thus can further extend the service life of the side beam 23 and the battery tray 100.

[0065] According to another specific embodiment of the present invention, as Figure 11 and Figure 12 shown, the plurality of sub-cavities 235 include: a first sub-cavity 2351 and a second sub-cavity 2352. In the width direction of the side beam 23, the first sub-cavity 2351 is located on the side closer to the placement groove 111 of the second sub-cavity 2352. The cross-sectional shape of the first sub-cavity 2351 is set as a trapezoid. Further, the bottom wall 234 of the cavity constitutes the bottom wall of the trapezoid, and the included angle between the bottom wall 234 of the cavity and the partition 232 is configured as the base angle of the trapezoid of the first sub-cavity 2351, and the angle of the base angle is β, satisfying the relation: 50° ≤ β ≤ 70°. Preferably, β is 60°. Such a setting can further improve the structural stability of the side beam 23, further reduce the risk of deformation of the side beam 23, and thus can further extend the service life of the side beam 23 and the battery tray 100.

[0066] Further, as Figure 12As shown, the included angle between the two waists of the trapezoid of the first sub-cavity 2351 is α, satisfying the relational expression: 50° ≤ α ≤ 70°. Preferably, α is 60°. With such a setting, the structural stability of the side beam 23 can be further improved, the deformation risk of the side beam 23 can be further reduced, and thus the service lives of the side beam 23 and the battery tray 100 can be further extended.

[0067] In some embodiments of the present invention, as Figure 12 shown, the cross-sectional shape of the second sub-cavity 2352 is trapezoidal. The bottom wall 234 of the cavity forms the top wall of the trapezoid of the second sub-cavity 2352, and the top wall 233 of the cavity forms the bottom wall of the trapezoid of the second sub-cavity 2352. With such a setting, the structural stability of the side beam 23 can be further improved, the deformation risk of the side beam 23 can be further reduced, and thus the service lives of the side beam 23 and the battery tray 100 can be further extended.

[0068] It should be noted that the cross-section of the first sub-cavity 2351 refers to the section in the width direction of the side beam 23, that is, the section of the first sub-cavity 2351 perpendicular to the length direction of the side beam 23. The cross-section of the second sub-cavity 2352 refers to the section in the width direction of the side beam 23, that is, the section of the second sub-cavity 2352 perpendicular to the length direction of the side beam 23.

[0069] In some embodiments of the present invention, the side beam 23 includes a support portion 22. The support portion 22 is provided on the side of the side beam body 231 close to the placement groove 111. The support portion 22 is used to support the battery cell 201. That is, the side beam body 231 is connected with a support portion 22 extending towards the placement groove 111. The support portion 22 is used to support the battery cell 201 in the tray bottom plate 10 of the battery tray 100. The support portion 22 supports on the lower surface of the tray bottom plate 10 to support the battery cell 201. The side beam 23 bears most of the weight of the battery cell 201, and the tray bottom plate 10 of the battery tray 100 does not bear the weight of the battery cell 201 or only bears a small part of the weight of the battery cell 201, greatly reducing the load-bearing requirement of the tray bottom plate 10.

[0070] In some embodiments of the present invention, the side beam 23 is configured as an integrally formed part. It can also be understood that the side beam body 231 and the support portion 22 are integrally formed parts. Further, the side beam 23 can be made of aluminum material, and the side beam 23 can also be made of steel material. However, the present invention is not limited thereto. The side beam 23 can also be made of other metal materials that play the same role as steel materials. Preferably, the side beam 23 is made of steel material. The side beam 23 can be formed by rolling steel material, and the side beam 23 can also be formed by extruding steel material. Among them, by setting the side beam 23 as an integrally formed part, the load-bearing capacity of the side beam 23 can be improved, and the deformation risk of the side beam 23 can be reduced.

[0071] The battery tray 100 according to an embodiment of the present invention includes a plurality of side beams 23, and the plurality of side beams 23 are connected to form a frame 20.

[0072] As Figures 1 - 12 shown, the battery tray 100 according to an embodiment of the present invention includes: a tray bottom plate 10 and a frame 20. The tray bottom plate 10 includes a bottom plate body 11 and an extension portion 12. The bottom plate body 11 defines a placement groove 111 for placing the battery cells 201 or the battery module. In this application, the case where the placement groove 111 places the battery cells 201 is taken as an example for description. Further, the bottom wall 113 of the placement groove has a pressure-receiving area 112 for supporting the battery cells 201. The pressure-receiving area 112 refers to the area where the positive projection of the bottom wall 113 of the placement groove coincides with the positive projection of the battery cells 201 in the height direction of the battery tray 100 when the battery cells 201 are installed in the placement groove 111. Or it can also be understood that when the battery cells 201 are installed in the placement groove 111, the contact area between the battery cells 201 and the bottom wall 113 of the placement groove. The contact area includes the area where the battery cells 201 are in direct contact or indirect contact with the bottom wall 113 of the placement groove. For example: when there is an adhesive or a cooling structure between the battery cells 201 and the bottom wall 113 of the placement groove, it belongs to the indirect contact between the battery cells 201 and the bottom wall 113 of the placement groove. When there is no other object between the battery cells 201 and the bottom wall 113 of the placement groove, the battery cells 201 are in direct contact with the bottom wall 113 of the placement groove. Or it can also be understood that the area where the weight of the battery cells 201 directly acts on the bottom wall 113 of the placement groove is the pressure-receiving area 112. Among them, in the height direction of the battery tray 100, the positive projection of the bottom wall 113 of the placement groove is also the projection of the bottom wall 113 of the placement groove in a plane perpendicular to the height direction of the battery tray 100. In the height direction of the battery tray 100, the positive projection of the battery cells 201 is also the projection of the battery cells 201 in a plane perpendicular to the height direction of the battery tray 100. It can be understood that when the battery tray 100 is installed on a vehicle, the height of the battery tray 100 can be consistent with the height direction of the vehicle.

[0073] When the battery cells 201 are installed in the battery tray 100, the battery cells 201 are located in the pressure-receiving area 112 of the placement groove 111. The extension portion 12 extends along the circumferential edge of the bottom plate body 11. Further, the extension portion 12 is configured as an annular structure. Specifically, the extension portion 12 is configured as a closed-loop structure.

[0074] The bottom plate body 11 is installed on the frame 20. Further, the bottom plate body 11 is fixedly installed on the frame 20. The bottom plate body 11 can be adhered to the frame 20, or the bottom plate body 11 can also be installed on the frame 20 by bolts. The specific assembly method of the bottom plate body 11 and the frame 20 is not specifically limited and can be selected according to actual needs. Further, the frame 20 defines an installation space 21, and the bottom plate body 11 is installed in the installation space 21. The extension portion 12 is located outside the installation space 21. In the height direction of the battery tray 100, the extension portion 12 is located above the frame 20 and is provided on the frame 20. The frame 20 has a support portion 22 extending into the installation space 21, and the support portion 22 is used to support the tray bottom plate 10. Further, the support portion 22 is used to support the bottom plate body 11, and the support portion 22 is used to support the pressure-receiving area 112 of the tray bottom plate 10. As Figure 6 , Figure 8 and Figure 11 shown, in this application, the battery tray 100 is placed in the up-and-down direction as an example for illustration. After the bottom plate body 11 is installed in the installation space 21, the extension portion 12 is arranged outside the installation space 21. In the up-and-down direction of the battery tray 100, the extension portion 12 is correspondingly arranged with the frame 20. Specifically, as Figure 11 shown, the extension portion 12 is located above the frame 20, and the extension portion 12 is arranged opposite to the frame 20. In the up-and-down direction of the battery tray 100, the extension portion 12 can cover the entire upper surface of the frame 20.

[0075] Among them, as Figure 11As shown, when the battery cell 201 is installed in the placement groove 111, the battery cell 201 is located within the pressure-receiving area 112, and the support portion 22 supports the pressure-receiving area 112. The battery cell 201 is carried on the frame 20, and the frame 20 bears most of the weight of the battery cell 201. The tray bottom plate 10 does not bear the weight of the battery cell 201 or only bears a small part of the weight of the battery cell 201, greatly reducing the load-bearing requirement of the tray bottom plate 10. Further, the tray bottom plate 10 is provided as an insulating member. Further, the tray bottom plate 10 is provided as a non-metallic member. The tray bottom plate 10 can be made of a material with lower strength and thinner thickness. The tray bottom plate 10 made of a lightweight non-metallic insulating composite material is sufficient. For example, the lightweight non-metallic insulating composite material can be made of resin and glass fiber. The resin can be epoxy resin or polyurethane, but the present invention is not limited thereto. The lightweight non-metallic insulating composite material can also be made of other non-metallic composite materials that play the same role as resin and glass fiber. Such a setting can reduce the weight of the tray bottom plate 10, which is beneficial to the lightweight design of the battery tray 100 and the battery pack 200. Moreover, the existing tray bottom plate 10 is made of aluminum material. By using a composite material to make the tray bottom plate 10 in the present application, the production cost of the tray bottom plate 10 can be reduced, which is beneficial to reducing the production cost of the battery tray 100 and the battery pack 200. It should be noted that the tray bottom plate 10 made of a non-metallic composite material has excellent electrical insulation performance. When a serious bottoming accident occurs to the vehicle, there will be no high-voltage risks such as arcing in the battery pack 200.

[0076] Further, the tray bottom plate 10 is configured as an integrally formed part. The tray bottom plate 10 is molded by a lightweight non-metallic insulating composite material. During the molding process, the tray bottom plate 10 forms good airtightness after the resin melts and flows and solidifies. At the same time, the use of a mold part for molding can ensure that the tray bottom plate 10 has good flatness and dimensional accuracy, ensuring the sealing function of the tray bottom plate 10. The frame 20 can be formed by metal welding. After welding and forming, only the welding structure strength and the necessary product flatness need to be ensured. The welding efficiency is high, improving the production efficiency of the battery tray 100. Moreover, since the tray bottom plate 10 is responsible for sealing, there is no need for weld grinding and airtightness detection, and there is no risk of sealing failure caused by welding. The tray bottom plate 10 can be molded by a composite material. The production efficiency of the tray bottom plate 10 is high, and the high mold accuracy can obtain a high flatness, reducing the dimensional requirements of the battery cell 201.

[0077] In addition, the existing battery tray 100 does not distinguish between the load-bearing and sealing functions in terms of product structure. When manufacturing the battery tray 100, it is necessary to consider that both the overall load-bearing and sealing need to meet the requirements at the same time, resulting in low manufacturing efficiency and yield rate of the battery tray 100. In this application, the load-bearing and sealing functions are distinguished. The frame 20 is mainly responsible for load-bearing, and the tray bottom plate 10 is mainly responsible for the sealing of the battery tray 100, improving the manufacturing efficiency and yield rate of the battery tray 100.

[0078] Thus, through the cooperation of the tray bottom plate 10 and the frame 20, the frame 20 bears most of the weight of the battery cell 201, and the tray bottom plate 10 only bears a small part of the weight of the battery cell 201. The tray bottom plate 10 plays a sealing role, which can reduce the thickness of the tray bottom plate 10. The tray bottom plate 10 made of a lightweight composite material can be used, which is beneficial to the lightweight design and cost reduction of the battery tray 100 and the battery pack 200. Moreover, after the tray bottom plate 10 and the frame 20 are assembled together, there is no risk of the battery tray 100 losing its seal due to welding, and there is no need to polish the weld seam and detect the airtightness of the battery tray 100, improving the production efficiency of the battery tray 100.

[0079] In some embodiments of the present invention, as Figure 11 shown, when the battery tray 100 is placed in the placement manner of Figure 11 , in the height direction of the battery tray 100, the orthographic projection of the support portion 22 and the orthographic projection of the pressure-receiving area 112 have an overlapping area. After the battery cell 201 is placed in the placement groove 111, such a setting can ensure that the support portion 22 supports the battery cell 201, and can ensure that the frame 20 is mainly used to bear the weight of the battery cell 201. It can be understood that when the battery tray 100 is installed on a vehicle, the height direction of the battery tray 100 can be consistent with the height direction of the vehicle.

[0080] In some embodiments of the present invention, a pressure-receiving area 112 is formed on the bottom wall 113 of the placement groove, or it can be understood that the pressure-receiving area 112 is arranged on the bottom wall 113 of the placement groove. As Figure 11 shown, when the battery tray 100 is placed in the placement manner of Figure 11 , the support portion 22 is located below the bottom plate body 11, and the support portion 22 supports on the bottom wall 113 of the placement groove. Such a setting can ensure that the support portion 22 supports below the pressure-receiving area 112, can further ensure that the support portion 22 supports the battery cell 201, and can further ensure that the frame 20 is mainly used to bear the weight of the battery cell 201, so that the position of the pressure-receiving area 112 is reasonably arranged.

[0081] In some embodiments of the present invention, as Figure 6 and Figure 8As shown, the frame 20 may further include a first side beam, a second side beam, a third side beam, and a fourth side beam. The first side beam and the second side beam are disposed opposite to each other in the first direction, and at least one of the first side beam and the second side beam is the side beam 23 in the above embodiments. The third side beam and the fourth side beam are disposed opposite to each other in the second direction. It should be noted that the first side beam and the second side beam may be configured as the side beams 23 of the frame 20, the third side beam is configured as one of the front end beam 24 and the rear end beam 25 of the frame 20, and the fourth side beam is configured as the other of the front end beam 24 and the rear end beam 25. When the frame 20 is placed in Figure 8 the placement manner in Figure 8 , the first side beam and the second side beam are spaced apart in the left-right direction in Figure 8 . The front end beam 24 and the rear end beam 25 are both connected between the two side beams 23. The first side beam, the second side beam, the third side beam, and the fourth side beam are connected to form an installation space 21. The connection of the first side beam, the second side beam, the third side beam, and the fourth side beam includes direct connection and indirect connection. For example, taking the connection between the first side beam and the third side beam as an example, the first side beam and the third side beam may be directly connected, or the first side beam and the third side beam may be indirectly connected through other beams. The bottom plate body 11 is installed in the installation space 21, and the height direction extension portion 12 of the battery tray 100 is located above the frame 20 and is disposed on the frame 20. Wherein, one of the first direction and the second direction is the length direction of the battery tray 100, and the other of the first direction and the second direction is the width direction of the battery tray 100. It can be understood that when the battery tray 100 is installed on the vehicle, the width direction of the battery tray 100 may be consistent with the width direction of the vehicle, and the length direction of the battery tray 100 may be consistent with the length direction of the vehicle. Of course, the width direction of the battery tray 100 may also be consistent with the length direction of the vehicle, and the length direction of the battery tray 100 may be consistent with the width direction of the vehicle.

[0082] As Figure 6 shown, when the battery tray 100 is placed in Figure 6 the direction in Figure 6 , the first direction may refer to the left-right direction in Figure 6 , and the second direction may refer to the front-rear direction in Figure 6 . Of course, the first direction may refer to the front-rear direction in Figure 6 , and the second direction may refer to the left-right direction in Figure 6 . In this application, taking the left-right direction in Figure 6 as the first direction and the front-rear direction in Figure 8 as the second direction as an example for illustration. The first side beam and / or the second side beam are provided with a support portion 22, and the support portion 22 is used to support the tray bottom plate 10. Preferably, both the first side beam and the second side beam are provided with the support portion 22. When the battery cell 201 is along Figure 8When placed in the left - right direction, by arranging the supporting part 22 on the first side beam and / or the second side beam, it can be ensured that each battery cell 201 is supported by the supporting part 22, which can further ensure that the supporting part 22 supports the battery cell 201, and can further ensure that the frame 20 is mainly used to bear the weight of the battery cell 201, so that the setting position of the supporting part 22 is reasonable.

[0083] In some embodiments of the present invention, as Figure 8 shown, the frame 20 further includes a support beam 26. The support beam 26 is connected between two side beams 23 (that is, the support beam 26 is connected between the first side beam and the second side beam), or the support beam 26 is connected between the front end beam 24 and the rear end beam 25, or the support beam 26 is connected between the front end beam 24 and the side beam 23, or the support beam 26 is connected between the rear end beam 25 and the side beam 23. Such a setting can improve the structural strength of the frame 20, and thus can improve the structural strength of the battery tray 100.

[0084] In some embodiments of the present invention, as Figure 5 and Figure 6 shown, the battery tray 100 further includes an expansion beam 27. The expansion beam 27 is arranged on the side of the tray bottom plate 10 away from the frame 20. When the battery tray 100 is placed in the manner as Figure 5 and Figure 6 shown, the expansion beam 27 is arranged above the tray bottom plate 10. The expansion beam 27 is installed on the support beam 26 through bolts. After the battery cell 201 is installed in the placement groove 111, when the battery cell 201 expands, the expansion beam 27 can limit the battery cell 201, improving the use safety of the battery cell 201.

[0085] Furthermore, the support beam 26 is provided in multiple numbers. The multiple support beams 26 are arranged at intervals in the length direction of the side beam 23. The length direction of the side beam 23 refers to the Figure 6 front - rear direction shown. The expansion beam 27 is provided in multiple numbers. The multiple expansion beams 27 are arranged at intervals in the length direction of the side beam 23. The multiple expansion beams 27 and the multiple support beams 26 are arranged in one - to - one correspondence. One expansion beam 27 is installed on one support beam 26 through bolts, so that the expansion beam 27 can be stably installed on the frame 20.

[0086] In some embodiments of the present invention, as Figure 11As shown, the supporting portion 22 is disposed near the lower end of the side beam 23. It can also be understood that the supporting portion 22 is disposed near the end of the side beam 23 away from the tray bottom plate 10. Further, the supporting portion 22 of the first side beam is disposed near the lower end of the first side beam, and / or the supporting portion 22 of the second side beam is disposed near the lower end of the second side beam. Preferably, the supporting portion 22 of the first side beam is disposed near the lower end of the first side beam, and the supporting portion 22 of the second side beam is disposed near the lower end of the second side beam. After the bottom plate body 11 is installed in the installation space 21, by disposing the supporting portion 22 near the end of the side beam 23 away from the tray bottom plate 10, it can be ensured that the supporting portion 22 supports below the bottom plate body 11, and it can also be ensured that the bottom plate body 11 can be installed in the installation space 21.

[0087] In some embodiments of the present invention, as Figures 5 - 7 、 Figure 11 shown, when the battery tray 100 is placed in the Figure 11 placement manner, the upper end of the placement groove 111 is open, and the battery cell 201 can be placed into the placement groove 111 from the open end of the placement groove 111. And, the extension portion 12 extends along the open end of the placement groove 111. As Figure 11 shown, the extension portion 12 is connected to the upper end of the bottom plate body 11. After the bottom plate body 11 is installed in the installation space 21, such a setting can enable the extension portion 12 to be disposed outside the placement groove 111, and it can be ensured that the extension portion 12 is correspondingly disposed with the frame 20 in the up and down direction of the battery tray 100, thereby ensuring the sealing of the battery tray 100.

[0088] In some embodiments of the present invention, as Figure 8 、 Figure 10 and Figure 11 shown, the surface of the supporting portion 22 near the tray bottom plate 10 is configured as a plane. That is to say, as Figure 11 shown, the upper surface of the supporting portion 22 is set as a plane. Such a setting can ensure the supporting area between the supporting portion 22 and the bottom plate body 11, and can enable the supporting portion 22 to better support the battery cell 201.

[0089] In some embodiments of the present invention, the support portion 22 is located below the bottom plate body 11 and fixedly connected to the bottom plate body 11. Further, the tray bottom plate 10 is bonded to the frame 20. Further, by applying an adhesive (such as structural adhesive) between the tray bottom plate 10 and the frame 20, the tray bottom plate 10 and the frame 20 are adhesively connected. The thickness control of the adhesive is used to absorb the dimensional tolerance of the frame 20. At the same time, the tray bottom plate 10 has good flatness. The characteristics that the adhesive can absorb tolerances are used to reduce the manufacturing requirements for the tray bottom plate 10 and the frame 20. Moreover, when the existing tray bottom plate 10 and the frame 20 are welded, the tray bottom plate 10 is prone to deformation during the welding process, which increases the dimensional requirements for the battery cells 201 during the subsequent assembly process of the battery pack 200 and affects the assembly efficiency of the battery pack 200. In this application, by adhesively connecting the tray bottom plate 10 and the frame 20 and avoiding the welded connection between the tray bottom plate 10 and the frame 20, the deformation of the tray bottom plate 10 can be prevented, the dimensional requirements for the battery cells 201 during the subsequent assembly process of the battery pack 200 are reduced, and the assembly efficiency of the battery pack 200 is improved.

[0090] In some embodiments of the present invention, the tray bottom plate 10 is configured as an integrally formed part. The tray bottom plate 10 is molded from a lightweight composite material. During the molding process, the tray bottom plate 10 forms good airtightness after the resin melts, flows, and solidifies. At the same time, molding through the mold parts can ensure that the tray bottom plate 10 has good flatness and dimensional accuracy, ensuring the sealing function of the tray bottom plate 10.

[0091] In some embodiments of the present invention, the frame 20 is configured as a metal part. The frame 20 can be made of aluminum material, or the frame 20 can be made of steel material. However, the present invention is not limited thereto. The frame 20 can also be made of other metal materials that have the same function as steel materials. Preferably, the frame 20 is made of steel material. The frame 20 can be formed by rolling steel material, or the frame 20 can be formed by extruding steel material. Among them, by setting the frame 20 as a metal part, the load-bearing capacity of the frame 20 can be improved, and the risk of deformation of the frame 20 can be reduced.

[0092] Further, as Figure 10 and Figure 11 shown, the lower end of the second side wall 237 is connected with a support portion 22 extending towards the accommodation groove 111, and the support portion 22 is connected with the bottom wall 234 of the cavity. Further, as Figure 12As shown, in the width direction of the side beam 23, the bottom wall 234 of the cavity has a structural strengthening portion 2341 extending below the support portion 22. The structural strengthening portion 2341 is connected to the end of the support portion 22 close to the tray bottom plate 10. It can also be understood that one end of the structural strengthening portion 2341 close to the installation space 21 (or the placement groove 111) extends below the support portion 22, and the end of the structural strengthening portion 2341 close to the installation space 21 (or the placement groove 111) is connected to the end of the support portion 22 close to the installation space 21 (or the placement groove 111). Further, the structural strengthening portion 2341 is provided with a boss structure 2391 protruding towards the support portion 22, and the boss structure 2391 is connected to the support portion 22. With such a setting, the structural strength of the side beam 23 can be further improved, and the stability of the side beam 23 can be further enhanced.

[0093] Further, the structural strengthening portion 2341 is provided with a plurality of boss structures 2391. The plurality of boss structures 2391 are arranged in sequence in the width direction of the side beam 23. At least one of the plurality of boss structures 2391 is located below the compression area 112. Such a setting enables the boss structure 2391 to support the battery cell 201, can further enhance the load-bearing capacity of the frame 20, and reduce the risk of deformation of the support portion 22.

[0094] In some embodiments of the present invention, as Figure 5 and Figure 6 shown, the frame 20 is connected with a lug structure 30. The lug structure 30 is provided with a mounting hole. The lug structure 30 is mounted on the vehicle through a fastener (such as a bolt), so as to achieve the purpose of mounting the battery pack 200 on the vehicle.

[0095] As Figures 1 - 11 shown, the battery pack 200 according to the embodiment of the present invention includes a battery cell 201, a battery tray 100 and a cover 40. The battery tray 100 is the battery tray 100 of the above embodiment. The cover 40 and the tray bottom plate 10 jointly define a placement cavity 41 for placing the battery cell 201, and the cover 40 is connected to the frame 20. Further, the cover 40 covers the open end of the placement groove 111 to define the placement cavity 41. The extension portion 12 is clamped between the cover 40 and the frame 20. Bolts are used to pass through the cover 40, the extension portion 12 and the frame 20 to assemble the cover 40, the tray bottom plate 10 and the frame 20 together. Further, a sealing member 203 (such as a sealing ring) is clamped between the extension portion 12 and the cover 40. The sealing member 203 can seal the placement cavity 41. The cover 40 and the tray bottom plate 10 define a sealed insulating cavity (i.e., the placement cavity 41). After the battery cell 201 is placed in the placement cavity 41, the battery cell 201 can be completely isolated from the frame 20, and the battery cell 201 is in a completely insulated environment, and there is no risk of electric leakage in the battery pack 200. In some embodiments of the present invention, as Figure 1As shown, the battery pack 200 may further include: a pressing plate 202, which is configured as a closed-loop structure. The cover 40, the seal 203, and the extension portion 12 are clamped between the pressing plate 202 and the frame 20. Bolts are used to pass through the pressing plate 202, the cover 40, the extension portion 12, and the frame 20 to assemble the pressing plate 202, the cover 40, the tray bottom plate 10, and the frame 20 together. The pressing plate 202 can make the entire seal 203 be uniformly pressed, ensuring reliable sealing of the placement cavity 41. In some other embodiments, the battery pack includes battery cells, a cover, and a battery tray. The battery tray includes a tray bottom plate and a plurality of side beams. At least one side beam is the side beam of the above embodiment. The plurality of side beams are connected to form a frame, and the frame and the tray bottom plate jointly define a placement groove for placing the battery cells. The cover is connected to the frame to form a placement cavity for placing the battery cells. Among them, the tray bottom plate is a flat plate structure.

[0096] The vehicle according to an embodiment of the present invention includes the battery pack 200 of the above embodiment. The battery pack 200 is installed in the vehicle to provide electrical energy for the vehicle. The frame 20 of the battery pack 200 mainly bears the weight of the battery cells 201. The tray bottom plate 10 only bears a small part of the weight of the battery cells 201. The tray bottom plate 10 mainly plays a sealing role. It is sufficient to use a tray bottom plate 10 made of a lightweight composite material, which is beneficial to the lightweight design of the battery tray 100, the battery pack 200, and the vehicle and cost reduction. Moreover, after the tray bottom plate 10 and the frame 20 are assembled together, there is no risk of the battery tray 100 losing its seal due to welding, and there is no need to perform weld grinding and airtightness detection of the battery tray 100, improving the production efficiency of the battery tray 100 and the vehicle. At the same time, the tray bottom plate 10 made of a composite material has excellent electrical insulation performance. When a serious grounding accident occurs to the vehicle, the battery pack 200 will not have high-voltage risks such as arcing, improving the safety of the vehicle.

[0097] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0098] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An edge beam for a battery tray, the battery tray having a placement groove for placing battery cells, characterized in that, Comprising: A side beam body, the side beam body defining a cavity, the side beam body having a partition portion located within the cavity, the partition portion being connected between the top wall and the bottom wall of the cavity to divide the cavity into a plurality of sub-cavities, the plurality of sub-cavities being arranged in sequence in the width direction of the side beam, and in the direction from the upper end to the lower end of the side beam, the partition portion being inclined away from the placement groove; In the width direction of the side beam, the cavity has a first side wall disposed away from the placement groove, the first side wall being connected between the top wall and the bottom wall of the cavity, and the first side wall being connected to the partition portion; The cavity has a second side wall close to the placement groove, the second side wall being connected between the top wall and the bottom wall of the cavity, and the second side wall being connected to the partition portion, and in the direction from the upper end to the lower end of the side beam, the second side wall being inclined towards the placement groove; A support portion extending towards the placement groove is connected to the lower end of the second side wall, and the support portion is used to support the battery cell; The bottom wall has a structural reinforcement portion extending below the support portion, the structural reinforcement portion being connected to the end of the support portion, and the structural reinforcement portion being provided with a boss structure protruding towards the support portion, and the boss structure being connected to the support portion; A first connecting portion extending into the cavity is connected to the lower end of the first side wall, the first connecting portion being located on the side of the bottom wall of the cavity facing the top wall of the cavity, and the first side wall being connected to the bottom wall and the partition portion of the cavity through the first connecting portion, and the first connecting portion being fixedly connected to the bottom wall of the cavity by welding; A second connecting portion extending into the cavity is connected to the upper end of the second side wall, the second connecting portion being located on the side of the top wall of the cavity facing the bottom wall of the cavity, and the second side wall being connected to the top wall and the partition portion of the cavity through the second connecting portion, and the second connecting portion being fixedly connected to the top wall of the cavity by welding; The top wall of the cavity, the bottom wall of the cavity, the first side wall and the second side wall together define the cavity; The side beam is configured as an integrally formed part.

2. The edge beam for a battery tray according to claim 1, characterized in that, The cross-sectional shape of each sub-cavity is triangular or trapezoidal.

3. The edge beam for a battery tray according to claim 2, characterized in that, The plurality of sub-cavities include: a first sub-cavity and a second sub-cavity, the first sub-cavity being located on the side of the second sub-cavity close to the placement groove, the cross-sectional shape of the first sub-cavity being triangular or trapezoidal, and / or the cross-sectional shape of the second sub-cavity being trapezoidal.

4. The edge beam for a battery tray according to claim 3, characterized in that, The triangle is an isosceles triangle or an equilateral triangle.

5. The edge beam for a battery tray according to claim 1, characterized in that, The included angle between the bottom wall of the cavity and the partition portion is β, satisfying the relationship: 50° ≤ β ≤ 70°.

6. The edge beam for a battery tray according to claim 1, characterized in that, The included angle between the second side wall and the partition portion is α, satisfying the relationship: 50° ≤ α ≤ 70°.

7. A battery tray, characterized in that, Comprising the side beam for a battery tray according to any one of claims 1-6.

8. The battery tray according to claim 7, characterized in that, Comprising: A tray bottom plate, the tray bottom plate including a bottom plate body and an extension portion, the bottom plate body defining a placement groove for placing a battery cell, and the extension portion extending along the circumferential edge of the bottom plate body; A frame, the frame including a first side beam, a second side beam, a third side beam, and a fourth side beam, at least one of the first side beam and the second side beam being the side beam, the first side beam and the second side beam being oppositely arranged along a first direction, the third side beam and the fourth side beam being oppositely arranged along a second direction, the first side beam, the second side beam, the third side beam, and the fourth side beam being connected to form an installation space, the bottom plate body being installed in the installation space, in the height direction of the battery tray, the extension part being located above the frame and provided on the frame, the first side beam and / or the second side beam having a support part for supporting the tray bottom plate, wherein one of the first direction and the second direction is the length direction of the battery tray, and the other is the width direction of the battery tray.

9. A battery pack, characterized in that, Comprising the battery tray according to the cell and claim 7 or 8, the battery tray having a placement groove, the cell being placed in the placement groove.

10. A vehicle, characterized in that, Comprising the battery pack according to claim 9.

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