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

Abstract

The present invention provides a side beam (10) for a battery tray (100), a battery tray (100), a battery pack (200), and a vehicle. The side beam (10) for the battery tray (100) includes a first body (11) and a second body (12), the first body (11) includes a body portion (111) and a support portion (112), the support portion (112) is connected to the body portion (111) and supports a battery core (201), the second body (12) and the first body (11) are separate processed products, the second body (12) is fixed to the first body (11), and at least a part of the structure of the second body (12) is located on one side of the support portion (112).

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to Chinese Patent Application No. "202220554010X" filed by BYD Company Limited on March 14, 2022, and entitled "Side Beam for Battery Tray, Battery Tray, Battery Pack and Vehicle."

[0002] The present application 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 technology]

[0003] In the related art, a battery pack has a battery tray, and the side beam of the conventional battery tray is an integrally molded product, and the thickness and material of the side beam can only be adjusted as a whole, and the thickness and material of a certain position of the side beam cannot be adjusted individually, so that the side beam cannot meet the strength and weight requirements of different positions, and its versatility is low. In addition, the conventional battery tray uses the tray bottom plate of the battery tray to bear the weight of the battery core, so the tray bottom plate is thick, which is not helpful for the lightweight design and cost reduction of the battery pack. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems in the prior art. Therefore, one objective of the present application is to provide a side beam for a battery tray, which bears most of the weight of the battery core, reduces the strength requirements of the tray bottom plate, and is useful for lightweight design and cost reduction of the battery pack, and the second body and the first body can be manufactured separately, and the thickness and material of the second body and the first body can be flexibly adjusted according to actual needs to meet the strength and weight design requirements of different positions of the side beam, making it more versatile.

[0005] The present application further provides a battery tray.

[0006] The present application further provides a battery pack.

[0007] The present application further provides a vehicle.

[0008] The side beam for a battery tray having a mounting groove for mounting a battery core according to the present application includes a first body and a second body, the first body includes a main body portion and a support portion, the support portion is connected to the main body portion and is provided at an end portion of the main body portion close to the mounting groove, and supports a battery core, the second body and the first body are separate processed products, the second body is fixed to the first body, and at least a portion of the structure of the second body is located on the side away from the mounting groove of the support portion.

[0009] The side beam for the battery tray according to the present application has a support portion so that the side beam bears most of the weight of the battery core and the tray bottom plate of the battery tray bears only a small portion of the weight of the battery core, thereby reducing the strength requirements for the tray bottom plate and enabling the thickness of the tray bottom plate to be reduced, which is helpful for designing a lightweight battery pack and reducing costs. In addition, by making the second body and the first body separate processed products, the second body and the first body can be manufactured separately, and the thickness and material of the second body and the first body can be flexibly adjusted according to actual needs, allowing the side beam to meet the design requirements for strength and weight at different positions and making it more versatile.

[0010] In some examples of the present application, a length dimension of the support portion supporting the battery core in the width direction of the side beam is A, which satisfies the relational expression of 30 mm≦A≦100 mm.

[0011] In some examples of the present application, the main body portion includes a top plate, a bottom plate, a first side plate, and a second side plate, the top plate and the bottom plate being spaced apart in the height direction of the side beam, the first side plate and the second side plate being spaced apart in the width direction of the side beam, the first side plate being connected between the top plate and the bottom plate, the second side plate being connected between the support portion and the top plate, and a structural reinforcement plate being connected between the top plate and the bottom plate.

[0012] In some examples herein, the structural reinforcement plate is connected between the top plate and the bottom plate at an angle.

[0013] In some examples herein, in a direction from the top to the bottom of the side beam, the structural reinforcement plate is inclined away from the mounting groove.

[0014] In some examples of the present application, the included angle between the structural reinforcement plate and the bottom plate is β, which satisfies the relationship 110°≦β≦140°.

[0015] In some examples of the present application, the second side plate is inclined in a direction from an upper end to a lower end of the side beam toward the mounting groove.

[0016] In some examples of the present application, the included angle between the second side plate and the structural reinforcing plate is α, which satisfies the relationship 50°≦α≦70°.

[0017] In some examples of the present application, a height difference between the lower surface of the bottom plate and the lower surface of the support portion in the height direction of the side beam is H, which satisfies the relationship 5 mm≦H≦10 mm.

[0018] In some examples of the present application, at least a portion of the structure of the second body is located below the support, and the structure of the second body located below the support is provided with a protrusion that protrudes toward the first body, and the protrusion is fixedly connected to the support.

[0019] In some examples herein, the second body is a flat plate-like structure, the second body is fixedly connected to the support portion, and the support portion is provided with a protrusion that supports the battery core.

[0020] In some examples herein, the body portion and the support portion are configured as a single piece.

[0021] The battery tray of the present application includes a side beam and a tray bottom plate, the side beam being a side beam for the above-mentioned battery tray, the tray bottom plate having a pressure-receiving area that supports a battery core, the support portion being supported below the tray bottom plate, and in the height direction of the battery tray, an overlap area is formed between an orthogonal projection of the support portion and an orthogonal projection of the pressure-receiving area.

[0022] The battery pack of the present application includes a battery core, a battery tray, and a lid body, the battery tray being the above-mentioned battery tray, the lid body and the battery tray together defining a mounting cavity for mounting the battery core, and the lid body being connected to the battery tray.

[0023] A vehicle according to the present application includes the battery pack.

[0024] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a schematic diagram of a side beam according to the first embodiment of the present application. [Diagram 2] 1 is a cross-sectional view of a side beam according to a first embodiment of the present application. [Diagram 3] FIG. 2 is a schematic view of a first main body of a side beam according to a first embodiment of the present application. [Figure 4] FIG. 4 is a schematic view of a second body of the side beam according to the first embodiment of the present application. [Diagram 5]FIG. 2 is a schematic diagram of a lug structure of a side beam according to a first embodiment of the present application. [Figure 6] FIG. 11 is a schematic diagram of a side beam according to a second embodiment of the present invention. [Figure 7] FIG. 4 is a cross-sectional view of a side beam according to a second embodiment of the present invention. [Figure 8] 1 is a schematic diagram of a battery pack according to an embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of a battery tray of a battery pack according to an embodiment of the present application. [Figure 10] FIG. 2 is a cross-sectional view of a side beam and a battery core after assembly according to a first embodiment of the present invention. [Figure 11] FIG. 11 is an enlarged view of part A in FIG. [Figure 12] 1 is a schematic diagram showing that the second body of the side beam according to the embodiment of the present application has a flat plate structure. [Figure 13] 1 is a schematic diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, the embodiments of the present application will be described in detail, and examples of the embodiments are shown in the drawings, and the same or similar reference numerals throughout indicate the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are only for interpreting the present application, and should not be understood as limiting the present application.

[0027] Hereinafter, the side beam 10 for the battery tray 100 according to the embodiment of the present application will be described with reference to FIGS. 1 to 13. The battery tray 100 has a mounting groove 1000 for mounting the battery core 201, and includes a frame 60. The frame 60 can define an installation space 61. For example, the frame 60 includes a front beam 40, a rear beam 50, and two side beams 10, and the two side beams 10, the front beam 40, and the rear beam 50 together define the installation space 61. When the battery pack 200 is arranged in the arrangement manner shown in FIG. 8, the two side beams 10 are spaced apart in the left-right direction in FIG. 8, the front beam 40 and the rear beam 50 are both connected between the two side beams 10, and the front beam 40 and the rear beam 50 are spaced apart in the front-rear direction of the battery pack 200, whereby the front beam 40, the rear beam 50, and the two side beams 10 together define the installation space 61. Of course, in other embodiments the number of side beams 10 may be more than two.

[0028] 1 to 11, the side beam 10 according to the embodiment of the present application includes a first body 11 and a second body 12. The first body 11 includes a body portion 111 and a support portion 112. The support portion 112 is connected to the body portion 111, provided at an end of the body portion 111 close to the mounting groove 1000, and supports the battery core 201. Furthermore, in the width direction of the side beam 10, the support portion 112 is connected to the side of the body portion 111 close to the mounting space 61, and extends toward the mounting space 61. When the side beam 10 is disposed in the direction shown in FIG. 2, the width direction of the side beam 10 refers to the left-right direction in FIG. 2, and the mounting space 61 and the mounting groove 1000 are located on the right side of the side beam 10. The second body 12 and the first body 11 are separate processed products, and the second body 12 and the first body 11 are individual parts and may be understood to be manufactured by processing them separately, rather than being an integrally molded product. The second body 12 is fixed to the first body 11, i.e., the second body 12 and the first body 11 are fixedly connected. The second body 12 and the first body 11 may be welded and fixed by a welding method, the second body 12 and the first body 11 may be connected and fixed by a screwing method, or the second body 12 and the first body 11 may be connected and fixed by a riveting and adhesive method. This application will explain the example of welding the second body 12 and the first body 11 by a welding method.

[0029] At least a part of the structure of the second body 12 is located on the side away from the mounting groove 1000 of the support 112, and when the side beam 10 is arranged in the direction in FIG. 2, at least a part of the structure of the second body 12 is located on the lower side of the support 112, that is, at least a part of the structure of the second body 12 is located below the support 112, and at least a part of the structure of the second body 12 may be understood to be located on the side away from the battery core 201 of the support 112. When the side beam 10 is arranged in the direction in FIG. 2, at least a part of the structure of the second body 12 is located below the support 112, and when a part of the structure of the second body 12 is located below the support 112, the other part of the structure of the second body 12 may be located below the main body 111 and / or above the main body 111 and / or on one side of the main body 111, for example, a part of the structure of the second body 12 is located below the support 112, and the other part of the structure of the second body 12 is located below the main body 111.

[0030] The battery tray 100 may further include a tray bottom plate 20 , which has a pressure-receiving area 2011 for supporting the battery core 201 , that is, the bottom wall of the mounting groove 1000 has a pressure-receiving area 2011 . The pressure-receiving area 2011 refers to an area where the orthogonal projection of the tray bottom plate 20 and the orthogonal projection of the battery core 201 overlap in the height direction of the battery tray 100 when the battery core 201 is attached to the tray bottom plate 20, or may be understood to be a contact area between the battery core 201 and the tray bottom plate 20 when the battery core 201 is attached to the tray bottom plate 20, and the contact area includes an area where the battery core 201 and the tray bottom plate 20 are in direct contact or an area where they are in indirect contact. For example, when there is an adhesive or a cooling structure between the battery core 201 and the tray bottom plate 20, the battery core 201 and the tray bottom plate 20 are in indirect contact, and when there is no other object between the battery core 201 and the tray bottom plate 20, the battery core 201 and the tray bottom plate 20 are in direct contact, or the area where the weight of the battery core 201 acts directly on the tray bottom plate 20 may be understood to be the pressure-receiving area 2011. In the height direction of the battery tray 100, the orthogonal projection of the bottom wall of the mounting groove 1000 is, in other words, the projection of the bottom wall of the mounting groove 1000 onto a plane perpendicular to the height direction of the battery tray 100. In the height direction of the battery tray 100, the orthogonal projection of the battery core 201 is, in other words, the projection of the battery core 201 onto a plane perpendicular to the height direction of the battery tray 100.

[0031] When the battery core 201 is mounted in the battery tray 100, the battery core 201 is placed on the tray bottom plate 20 and located in the pressure-receiving area 2011 of the tray bottom plate 20. When the battery pack 200 is arranged in the arrangement manner in FIG. 8 and FIG. 11, the tray bottom plate 20 is located above the support part 112. In the height direction of the battery tray 100, that is, in the up-down direction in FIG. 11, the orthogonal projection of the support part 112 and the orthogonal projection of the pressure-receiving area 2011 have an overlapping area, so that the support part 112 can support the battery core 201. The weight of the battery core 201 is borne by the side beam 10, and the side beam 10 bears most of the weight of the battery core 201, and the tray bottom plate 20 bears no weight of the battery core 201 or only a small part of the weight of the battery core 201, which greatly reduces the load requirement of the tray bottom plate 20 and can reduce the thickness of the tray bottom plate 20. In some alternative embodiments, the tray bottom plate 20 is provided as a non-metallic part. In some alternative embodiments, the tray bottom plate 20 is provided as an insulating part, and the tray bottom plate 20 may be made of a material with lower strength and smaller thickness, and the tray bottom plate 20 may be made of a lightweight non-metallic composite material, 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, but the present application is not limited thereto, and the lightweight non-metallic composite material may be made of other composite materials that perform the same effect as resin and glass fiber, which can reduce the weight of the tray bottom plate 20, which is conducive to the lightweight design of the battery tray 100 and the battery pack 200, and can also reduce the manufacturing cost of the side beam 10, the battery tray 100, and the battery pack 200.

[0032] Furthermore, by making the second body 12 and the first body 11 separate processed products, the second body 12 and the first body 11 can be manufactured separately, and the thickness and material of the second body 12 and the first body 11 can be adjusted separately, so that the side beam 10 meets the design requirements for strength and weight at different positions. Compared to an integrated side beam 10 made by roll pressing, in which the thickness and material can only be adjusted as a whole, the side beam 10 of the present application has a reduced manufacturing cost. Furthermore, it is difficult to roll press a complex cross-section as a single unit with the integrated side beam 10 made by roll pressing, but in the present application, by making the side beam 10 a separate structure, a side beam 10 with a more complex cross-section can be formed.

[0033] As a result, by providing the support portion 112, the side beam 10 bears most of the weight of the battery core 201, and the tray bottom plate 20 of the battery tray 100 bears only a small portion of the weight of the battery core 201, thereby reducing the strength requirements of the tray bottom plate 20 and making the thickness of the tray bottom plate 20 smaller, which helps to design the battery pack 200 to be lightweight and reduce costs. In addition, by making the second body 12 and the first body 11 separate processed products, the second body 12 and the first body 11 can be manufactured separately, and the thickness and material of the second body 12 and the first body 11 can be adjusted individually so that the side beam 10 can meet the design requirements for strength and weight at different positions.

[0034] In some embodiments of the present application, when the side beam 10 is disposed in the direction shown in FIG. 2, the width direction of the side beam 10 refers to the left-right direction in FIG. 2, and the length dimension of the support portion 112 supporting the battery core 201 is A, which satisfies the relational expression of 30 mm≦A≦100 mm. In the vertical direction in FIG. 11, the orthogonal projection of the support portion 112 and the orthogonal projection of the pressure receiving area 2011 overlap each other in the width direction of the side beam 10 by 30 mm to 100 mm. In this way, the support area for the support portion 112 to support the battery core 201 can be secured, and the support portion 112 can be secured to play a supporting role for the battery core 201. The support portion 112 can reliably support the battery core 201, thereby reducing the risk of vibration failure of the battery core 201, and reducing the risk of vibration failure of the battery pack 200, and further ensuring the vibration safety of the battery pack 200.

[0035] In some embodiments of the present application, as shown in Fig. 2 and Fig. 7, the main body 111 includes a top plate 113, a bottom plate 114, a first side plate 115, and a second side plate 116, the top plate 113 and the bottom plate 114 are spaced apart in the height direction of the side beam 10, the first side plate 115 and the second side plate 116 are spaced apart in the width direction of the side beam 10, and the first side plate 115 is connected between the top plate 113 and the bottom plate 114. As shown in Fig. 2, the first side plate 115 and the second side plate 116 are spaced apart in the width direction of the side beam 10, the second side plate 116 is located on the side of the first side plate 115 close to the mounting groove 1000 of the battery tray 100, and the second side plate 116 is connected between the support portion 112 and the top plate 113. In some alternative embodiments, a support 112 is connected to the lower end of the second side panel 116, an upper end of the second side panel 116 is connected to the top plate 113, the support 112 is welded to the second body 12, a structural reinforcement plate 117 is connected between the top plate 113 and the bottom plate 114, and the structural reinforcement plate 117 is located between the first side panel 115 and the second side panel 116. As shown in Figures 2 and 7, a bottom plate 114 is connected to the lower end of the first side plate 115, and the bottom plate 114 is connected to the second body 12 and the structural reinforcement plate 117, for example, the bottom plate 114 is welded to the second body 12, and a first connecting plate 119 is provided at the upper end of the structural reinforcement plate 117, and the first connecting plate 119 is connected to the top plate 113, for example, the first connecting plate 119 is welded to the top plate 113. By doing this, the structural strength and rigidity of the side beam 10 can be improved, the structural stability of the side beam 10 can be improved, and the risk of deformation of the side beam 10 can be reduced.

[0036] In addition, in the width direction of the side beam 10, the structural reinforcement plate 117 is spaced apart from the first side plate 115 and the second side plate 116, the structural reinforcement plate 117, the bottom plate 114, the first side plate 115, and the top plate 113 together define a first cavity 122, and the structural reinforcement plate 117, the second body 12, the second side plate 116, and the top plate 113 together define a second cavity 123, the first cavity 122 and the second cavity 123 are distributed in the width direction of the side beam 10, and when the first cavity 122 receives an impact, the first cavity 122 can absorb the impact force and reduce the magnitude of the impact force transmitted to the inside of the battery pack 200, thereby reducing the risk of damage to the battery core 201 in the battery pack 200, and thereby improving the safety of the use of the battery pack 200.

[0037] In some embodiments, the height direction of the side beam 10 may coincide with the height direction of the battery tray 100, and the width direction of the side beam 10 may coincide with the width direction or length direction of the battery tray 100. When the battery tray 100 is attached to a vehicle 2000, the height direction of the side beam 10 may coincide with the height direction of the vehicle 2000, and the width direction of the side beam 10 may coincide with the vehicle length direction or vehicle width direction.

[0038] In some embodiments of the present application, a rivet nut 120 is provided on the main body 111. Specifically, the rivet nut 120 is provided on the top plate 113, the rivet nut 120 is inserted into the first cavity 122, and the bolt and the rivet nut 120 are fitted together to connect the side beam 10 and the cover body 202 of the battery pack 200 together.

[0039] In some embodiments of the present application, as shown in Figures 2 and 7, the structural reinforcement plate 117 is connected at an incline between the top plate 113 and the bottom plate 114 and supported at an incline between the top plate 113 and the bottom plate 114, thereby further improving the structural strength and rigidity of the side beam 10, improving the structural stability of the side beam 10, and further reducing the risk of deformation of the side beam 10, thereby extending the service life of the side beam 10 and the battery tray 100.

[0040] In some alternative embodiments, when the side beam 10 is arranged in the arrangement manner in FIG. 2, in the direction from the upper end to the lower end of the side beam 10, the structural reinforcement plate 117 is inclined away from the mounting groove 1000, the structural reinforcement plate 117 is inclined away from the second side plate 116, or the structural reinforcement plate 117 is inclined away from the mounting space 61 of the battery tray 100. In the direction from the top to the bottom of the battery tray 100, the structural reinforcement plate 117 is inclined away from the mounting space 61, which can further improve the structural strength and rigidity of the side beam 10, and can further improve the stability of the side beam 10, thereby further improving the ability of the side beam 10 to support the battery core 201, and can further reduce the risk of deformation of the side beam 10.

[0041] 12, the included angle between the structural reinforcement plate 117 and the bottom plate 114 is β, which satisfies the relationship 110°≦β≦140°, for example, β is 120°. In this way, the structural stability of the side beam 10 can be further improved, and the deformation risk of the side beam 10 can be further reduced, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0042] In some embodiments of the present application, as shown in Figures 2 and 7, in the direction from the upper end to the lower end of the side beam 10, the second side plate 116 is inclined in a direction approaching the mounting groove 1000. In other words, the second side plate 116 is inclined in a direction away from the first side plate 115. In this way, the structural strength of the side beam 10 can be further improved, and the stability of the side beam 10 can be further improved, thereby further improving the ability of the side beam 10 to support the battery core 201, and further reducing the risk of deformation of the frame 20.

[0043] In some embodiments of the present application, as shown in Figures 2 and 7, the included angle between the second side plate 116 and the structural reinforcement plate 117 is α, which satisfies the relationship 50°≦α≦70°, for example, α is 60°, which can further improve the structural stability of the side beam 10 and further reduce the risk of deformation of the side beam 10, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0044] In some embodiments of the present application, the cross-sectional shapes of the first cavity 122 and the second cavity 123 are both triangular or trapezoidal, which can improve the structural stability of the side beam 10 and further reduce the risk of deformation of the side beam 10.

[0045] According to one specific embodiment of the present application, the cross-sectional shape of the second cavity 123 is triangular, that is, the cross-sectional shape of the second cavity 123 perpendicular to the longitudinal direction of the side beam 10 is triangular, and further, the triangle is an isosceles triangle or an equilateral triangle, and the second body 12 forms the bottom wall of the triangle, thereby further improving the structural stability of the side beam 10 and further reducing the risk of deformation of the side beam 10.

[0046] In some alternative embodiments, the included angle between the second body 12 and the structural reinforcement plate 117 becomes the base angle of a triangle, the angle of the base angle is β1, and satisfies the relationship 50°≦β1≦70°, for example, β1 is 60°, thereby further improving the structural stability of the side beam 10 and further reducing the deformation risk of the side beam 10, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0047] In some alternative embodiments, the apex angle of the triangle is α, which satisfies the relationship 50°≦α≦70°, for example, α is 60°, thereby making the cross-sectional shape of the second cavity 123 an equilateral triangle, which can further improve the structural stability of the side beam 10 and further reduce the risk of deformation of the side beam 10, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0048] According to another specific embodiment of the present application, as shown in FIG. 2, the cross-sectional shape of the second cavity 123 is a trapezoid, that is, the cross-sectional shape of the second cavity 123 perpendicular to the longitudinal direction of the side beam 10 is a trapezoid, and further, the second body 12 forms the bottom wall of the trapezoid, and the included angle between the second body 12 and the structural reinforcement plate 117 becomes the base angle of the trapezoid of the second cavity 123, and the angle of the base angle is β1, which satisfies the relationship of 50°≦β1≦70°, for example, β1 is 60°, and thus the structural stability of the side beam 10 can be further improved and the deformation risk of the side beam 10 can be further reduced, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0049] Furthermore, as shown in FIG. 2, the included angle between the two legs of the trapezoid of the second cavity 123 is α, that is, the included angle between the second side plate 116 and the structural reinforcement plate 117 satisfies the relationship 50°≦α≦70°, for example, α is 60°, by doing so, the structural stability of the side beam 10 can be further improved and the deformation risk of the side beam 10 can be further reduced, thereby further extending the service life of the side beam 10 and the battery tray 100.

[0050] In some embodiments of the present application, as shown in Figures 2 and 7, the cross-sectional shape of the first cavity 122 is trapezoidal, i.e., the cross-sectional shape of the first cavity 122 perpendicular to the longitudinal direction of the side beam 10 is trapezoidal, the bottom plate 114 forms the trapezoidal top wall of the first cavity 122, and the top plate 113 forms the trapezoidal bottom wall of the first cavity 122. In this way, the structural stability of the side beam 10 can be further improved, the risk of deformation of the side beam 10 can be further reduced, and the service life of the side beam 10 and the battery tray 100 can be further extended.

[0051] In some embodiments of the present application, as shown in Figures 2 and 7, in the height direction of the side beam 10, the height direction of the side beam 10 is the up-down direction in Figure 2, and the height difference between the lower surface of the bottom plate 114 and the lower surface of the support portion 112 is H, which satisfies the relationship 5 mm ≦ H ≦ 10 mm, for example, H is 8 mm. As shown in FIG. 2, the tray bottom plate 20 is provided on the upper surface of the support portion 112, which supports the tray bottom plate 20. A thermal insulation layer is provided on the underside of the tray bottom plate 20. The thermal insulation layer plays a thermal insulation role for the battery pack 200 and is located between two side beams 10 arranged opposite to each other. By setting the height difference between the underside of the bottom plate 114 and the underside of the support portion 112 to H, a space for providing the thermal insulation layer can be formed below the tray bottom plate 20, and the thickness of the thermal insulation layer can be ensured to be appropriate, thereby better insulating the battery pack 200 and avoiding the underside of the thermal insulation layer protruding from the battery tray 100, making the bottom of the battery tray 100 flatter.

[0052] In some embodiments of the present application, at least a part of the structure of the second body 12 is located below the support portion 112, and the structure of the second body 12 located below the support portion 112 is connected to the main body portion 111 and / or the support portion 112. Furthermore, as shown in Figs. 2 and 7, when the side beam 10 is arranged in the direction shown in Fig. 2, the entire structure of the second body 12 is located below the first body 11, a part of the structure of the second body 12 is located below the support portion 112, and the other part of the structure of the second body 12 is located below the main body portion 111, the second body 12 located below the main body portion 111 is welded to the bottom plate 114, and the second body 12 located below the support portion 112 is welded to the support portion 112, so that the second body 12 has a structural reinforcing effect, and in this way, the structural strength and rigidity of the side beam 10 can be further improved, and the risk of deformation of the side beam 10 can be reduced.

[0053] 2 and 7, at least a part of the structure of the second body 12 is located below the support portion 112, and the structure of the second body 12 located below the support portion 112 is provided with a protrusion 121 protruding toward the first body 11, and the protrusion 121 is fixedly connected to the support portion 112. Furthermore, when the side beam 10 is disposed in the direction shown in FIG. 2, the protrusion 121 is provided corresponding to the support portion 112 in the vertical direction of the side beam 10 and is welded to the support portion 112. In this way, the structural strength of the side beam 10 can be further improved, and the stability of the side beam 10 can be further improved, thereby preventing deformation of the support portion 112 and allowing the support portion 112 to reliably support the battery core 201.

[0054] As shown in FIG. 2, in the side beam 10 according to the first embodiment of the present application, the second body 12 protrudes toward the support portion 112 to form a protrusion 121, and the second body 12 can be manufactured by a roll press method. The structure located below the support portion 112 of the second body 12 has a plurality of protrusions 121, which are arranged in sequence in the width direction of the side beam 10, and at least one of the plurality of protrusions 121 is located below the pressure-receiving area 2011. In this way, the protrusion 121 can support the battery core 201, which further improves the load-bearing capacity of the side beam 10 and reduces the risk of deformation of the support portion 112.

[0055] As shown in FIG. 7 , the side beam 10 according to the second embodiment of the present application has a protrusion 121 formed by providing a protruding structure on a surface adjacent to the support portion 112 of the second body 12, and further, a hollowed-out cavity 124 is provided within the protrusion 121. The second body 12 can be manufactured by a roll press method, and the protrusion 121 is located below the support portion 112. In this way, the protrusion 121 can support the battery core 201 and the support portion 112, thereby further improving the load-bearing capacity of the side beam 10 and further reducing the risk of deformation of the support portion 112.

[0056] In some embodiments of the present application, as shown in FIG. 12, the second body 12 is configured to have a flat plate-like structure. In this way, the structure of the second body 12 can be simplified, the second body 12 can be easily manufactured, the manufacturing efficiency of the second body 12 can be improved, and the first body 11 can be easily roll-press molded.

[0057] Furthermore, as shown in FIG. 12 , the second body 12 is fixedly connected to the support portion 112, and the support portion 112 is provided with a protrusion 121 that supports the battery core 201, and in the height direction of the battery tray 100, there is an overlapping area between the orthogonal projection of the protrusion 121 and the orthogonal projection of the battery core 201, and the protrusion 121 is supported below the battery core 201, and the protrusion 121 can support the battery core 201. By providing the protrusion 121 on the support portion 112, the structural strength of the side beam 10 can be improved and the risk of deformation and cracking of the support portion 112 can be reduced, thereby extending the service life of the side beam 10 and enabling the side beam 10 to reliably support the battery core 201; and since the orthogonal projection of the protrusion 121 and the orthogonal projection of the battery core 201 have an overlapping area in the height direction of the battery tray 100, the protrusion 121 can support the battery core 201 and the supporting strength for the battery core 201 can be improved, thereby reliably supporting the battery core 201 and meeting the need for the side beam 10 to support the battery core 201.

[0058] In some embodiments of the present application, as shown in Figures 2, 5 to 7, a lug structure 30 is connected to the side beam 10, and the side beam 10 and the lug structure 30 may be welded together. The lug structure 30 has an attachment hole 31, and the lug structure 30 is attached to the vehicle 2000 by a fastener (e.g., a bolt), thereby achieving the purpose of attaching the battery pack 200 to the vehicle 2000.

[0059] The side beam 10 of the first embodiment and the side beam 10 of the second embodiment differ in that the specific structures of the projections 121 and the specific structures of the lug structures 30 are different.

[0060] In some embodiments of the present application, as shown in Figures 2 and 7, when the side beam 10 is arranged in the direction shown in Figure 2, in the height direction of the side beam 10, the height of the support portion 112 is lower than the height of the upper surface of the main body portion 111, and after the tray bottom plate 20 is installed in the mounting space 61, by making the height of the support portion 112 lower than the height of the upper surface of the main body portion 111, it can be ensured that the support portion 112 is supported below the tray bottom plate 20, it can be ensured that the tray bottom plate 20 is installed in the mounting space 61, and it can also be ensured that the support portion 112 can support the tray bottom plate 20 and the battery core 201.

[0061] In some embodiments of the present application, as shown in Figures 2 and 7, the main body portion 111 and the support portion 112 are configured as a single-piece molded product, and in this manner, the first main body 11 can be configured as a single-piece molded product, thereby improving the structural strength and rigidity of the first main body 11, and thereby further improving the load-bearing capacity of the side beam 10.

[0062] In some embodiments of the present application, the first body 11 and the second body 12 are welded by at least one row of welds, each row of welds includes a plurality of welds, and the distance between any two adjacent welds in each row of welds is D, which satisfies the relational expression of 40 mm≦D≦60 mm. The first body 11 and the second body 12 are welded by a laser welding method, and if there are too many welds, the first body 11 and the second body 12 are deformed, and if there are too few welds, the assembly strength between the first body 11 and the second body 12 is insufficient. By setting the distance between any two adjacent welds in each row of welds to 40 mm to 60 mm, it is possible to prevent the first body 11 and the second body 12 from being deformed, ensure the assembly strength between the first body 11 and the second body 12, and also prevent the first body 11 and the second body 12 from being separated.

[0063] In some embodiments of the present application, the first body 11 and the second body 12 may be made of aluminum material or steel material, but the present application is not limited thereto, and the first body 11 and the second body 12 may be made of other metal materials that perform the same effect as steel material. For example, the first body 11 and the second body 12 may both be made of steel material, and the first body 11 and the second body 12 may be roll-pressed with steel material or extruded with steel material. By making the first body 11 and the second body 12 metal parts, the load-bearing capacity of the side beam 10 can be improved and the risk of deformation of the side beam 10 can be reduced. In addition, the first body 11 and the second body 12 made of steel material can withstand high temperatures of 1500°C or more, ensuring the integrity of the side beam 10 during thermal runaway of the battery core 201.

[0064] As shown in Figures 1 to 11, the battery tray 100 of the embodiment of the present application includes a side beam 10 and a tray bottom plate 20, where the side beam 10 is the side beam 10 in the above embodiment, and the tray bottom plate 20 is the tray bottom plate 20 in the above embodiment. Specifically, the battery tray 100 includes a frame 60, where the frame 60 defines an installation space 61 and includes a side beam 10, and the tray bottom plate 20 is installed within the installation space 61 and has a pressure-receiving area 2011 that supports the battery core 201, and the support portion 112 is supported below the tray bottom plate 20, and in the height direction of the battery tray 100, there is an overlapping area between the orthogonal projection of the support portion 112 and the orthogonal projection of the pressure-receiving area 2011, thereby enabling the support portion 112 to support the battery core 201. The weight of the battery core 201 is borne by the side beam 10, the side beam 10 bears most of the weight of the battery core 201, and the tray bottom plate 20 bears only a small part of the weight of the battery core 201, so that the load-bearing requirement of the tray bottom plate 20 can be greatly reduced, and the tray bottom plate 20 can be manufactured with a material with lower strength and smaller thickness, so that the weight of the tray bottom plate 20 can be reduced, which is conducive to the lightweight design of the battery tray 100 and the battery pack 200, and can also reduce the manufacturing costs of the side beam 10, the battery tray 100, and the battery pack 200. As can be understood, when the battery tray 100 is installed in 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.

[0065] As shown in Figs. 1 to 11, a battery pack 200 according to an embodiment of the present application includes a battery core 201, a battery tray 100, and a lid 202. The battery tray 100 is the battery tray 100 in the above embodiment, and the lid 202 and the battery tray 100 together define a mounting cavity in which the battery core 201 is mounted, and the lid 202 is connected to the battery tray 100. The lid 202, the frame 60, and the tray bottom plate 20 together define the mounting cavity in which the battery core 201 is mounted, and when the battery tray 100 is disposed in the direction shown in Fig. 2, the lid 202 is disposed above the mounting groove 1000 of the battery tray 100 to form the mounting cavity, and the battery core 201 is mounted in the mounting cavity, and the bolt and rivet nut 120 are fitted together to attach the lid 202 to the frame 60. Furthermore, a sealing material (e.g., a seal ring) is interposed at the connection point between the lid body 202 and the frame 60, and the sealing material seals the gap between the lid body 202 and the frame 60, seals the mounting cavity, and ensures the sealing of the battery pack 200.

[0066] In some embodiments of the present application, the battery pack 200 may further include a pressure plate, the pressure plate being configured as a closed annular structure, the cover 202 and the sealing material being interposed between the pressure plate and the frame 60, and a bolt being connected to the rivet nut 120 through the pressure plate, the cover 202 and the sealing material, so that the pressure plate, the cover 202, the sealing material and the frame 60 can be assembled together, and the pressure plate can bear pressure evenly across the sealing material, ensuring reliable sealing of the mounting cavity.

[0067] As shown in FIG. 11, the tray bottom plate 20 includes a bottom plate body 21 and an extension portion 22, and the bottom plate body 21 defines a mounting groove 1000 in which a battery core 201 or a battery module is mounted. In the present application, the battery core 201 is mounted in the mounting groove 1000 as an example. The bottom wall of the bottom plate body 21 has a pressure-receiving area 2011 that supports the battery core 201, and the extension portion 22 extends along the periphery of the bottom plate body 21. The extension portion 22 is configured as an annular structure, specifically, the extension portion 22 is configured as a closed annular structure. The bottom plate body 21 is mounted in the mounting space 61, and the extension portion 22 is located outside the mounting space 61. In the height direction of the battery tray 100, the extension portion 22 is located above the frame 60 and is provided on the frame 60.

[0068] The cover 202 is placed over the open end of the mounting groove 1000 to define a mounting cavity, and the extension 22 is interposed between the cover 202 and the frame 60. The cover 202, the extension 22, and the frame 60 are pierced by bolts to integrally assemble the cover 202, the tray bottom plate 20, and the frame 60. In addition, a sealant (e.g., a seal ring) is interposed between the extension 22 and the cover 202, and the sealant can seal the mounting cavity. The cover 202 and the tray bottom plate 20 define a sealed insulating cavity (i.e., a mounting cavity). After the battery core 201 is placed in the mounting cavity, the battery core 201 and the frame 60 can be completely isolated. The battery core 201 is in a completely insulated environment, and the battery pack 200 has no risk of leakage current.

[0069] In some embodiments of the present application, as shown in FIG. 8 , the battery pack 200 may further include a pressure plate 203, which is configured as a closed annular structure, and the cover 202, the sealing material and the extension 22 are interposed between the pressure plate 203 and the frame 60. By passing the pressure plate 203, the cover 202, the extension 22 and the frame 60 with bolts, the pressure plate 203, the cover 202, the tray bottom plate 20 and the frame 60 can be assembled together, and the pressure plate 203 can uniformly bear pressure on the entire sealing material, ensuring reliable sealing of the mounting cavity.

[0070] As shown in FIG. 13, the vehicle 2000 according to the embodiment of the present application includes the battery pack 200 according to the above embodiment, and the battery pack 200 is mounted on the vehicle 2000 to provide electric energy to the vehicle 2000, the side beam 10 bears most of the weight of the battery core 201, and the tray bottom plate 20 of the battery tray 100 bears only a small portion of the weight of the battery core 201, thereby reducing the strength requirements of the tray bottom plate 20 and making the thickness of the tray bottom plate 20 smaller, which is helpful for the lightweight design and cost reduction of the battery pack 200, and thus for the lightweight design and cost reduction of the vehicle 2000; and by making the second body 12 and the first body 11 separate processed products, the second body 12 and the first body 11 can be manufactured separately, and the thickness and material of the second body 12 and the first body 11 can be adjusted separately to meet the strength and weight design requirements of different positions of the side beam 10.

[0071] In the description of this specification, a description that refers to the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of the present application. In the description of this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined as appropriate in any one or more embodiments or examples.

[0072] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations 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

1. A side beam (10) for a battery tray (100) having a mounting groove (1000) for mounting a battery core (201), the side beam (10) including a first body (11) and a second body (12); The first body (11) includes a body portion (111) and a support portion (112), the support portion (112) is connected to the body portion (111) and is provided at an end portion of the body portion (111) adjacent to the mounting groove (1000), and supports a battery core (201); A side beam (10) for a battery tray (100), characterized in that the second body (12) and the first body (11) are separate processed products, the second body (12) is fixed to the first body (11), and at least a portion of the structure of the second body (12) is located on the side of the support portion (112) away from the mounting groove (1000).

2. The side beam (10) for a battery tray (100) according to claim 1, characterized in that in the width direction of the side beam (10), the length dimension of the support portion (112) supporting the battery core (201) is A, which satisfies the relationship 30 mm≦A≦100 mm.

3. 3. The side beam for a battery tray according to claim 1, wherein the main body portion (111) includes a top plate (113), a bottom plate (114), a first side plate (115), and a second side plate (116), the top plate (113) and the bottom plate (114) being spaced apart in a height direction of the side beam (10), the first side plate (115) and the second side plate (116) being spaced apart in a width direction of the side beam (10), the first side plate (115) being connected between the top plate (113) and the bottom plate (114), the second side plate (116) being connected between the support portion (112) and the top plate (113), and a structural reinforcement plate (117) being connected between the top plate (113) and the bottom plate (114).

4. 4. The side beam (10) for a battery tray (100) according to claim 3, characterized in that the structural reinforcement plate (117) is connected at an angle between the top plate (113) and the bottom plate (114).

5. The side beam (10) for a battery tray (100) as described in claim 4, characterized in that in a direction from the upper end to the lower end of the side beam (10), the structural reinforcement plate (117) is inclined in a direction away from the mounting groove (1000).

6. The side beam (10) for a battery tray (100) according to claim 4 or 5, characterized in that the included angle between the structural reinforcement plate (117) and the bottom plate (114) is β, which satisfies the relationship 110°≦β≦140°.

7. A side beam (10) for a battery tray (100) as described in any one of claims 3 to 6, characterized in that in a direction from the upper end to the lower end of the side beam (10), the second side plate (116) is inclined in a direction approaching the mounting groove (1000).

8. A side beam (10) for a battery tray (100) as described in any one of claims 3 to 7, characterized in that the included angle between the second side plate (116) and the structural reinforcement plate (117) is α, which satisfies the relationship 50°≦α≦70°.

9. The side beam (10) for a battery tray (100) according to any one of claims 3 to 8, characterized in that in the height direction of the side beam (10), a height difference between the lower surface of the bottom plate (114) and the lower surface of the support portion (112) is H, which satisfies the relationship 5 mm≦H≦10 mm.

10. A side beam (10) for a battery tray (100) as described in any one of claims 1 to 9, characterized in that at least a portion of the structure of the second body (12) is located below the support portion (112), and the structure of the second body (12) located below the support portion (112) is provided with a protrusion (121) protruding toward the first body (11), and the protrusion (121) is fixedly connected to the support portion (112).

11. The side beam (10) for a battery tray (100) described in any one of claims 1 to 9, characterized in that the second body (12) is a flat structure, the second body (12) is fixedly connected to the support portion (112), and the support portion (112) is provided with a protrusion (121) for supporting the battery core (201).

12. The side beam (10) for a battery tray (100) according to any one of claims 1 to 11, characterized in that the main body portion (111) and the support portion (112) are configured as an integrally molded product.

13. A battery tray (100) including a side beam (10) and a tray bottom plate (20), The side beam (10) is a side beam (10) for a battery tray (100) according to any one of claims 1 to 12, The battery tray (100) is characterized in that the tray bottom plate (20) has a pressure-receiving area (2011) that supports a battery core (201), the support portion (112) supports the lower part of the tray bottom plate (20), and in the height direction of the battery tray (100), an orthogonal projection of the support portion (112) and an orthogonal projection of the pressure-receiving area (2011) have an overlapping area.

14. A battery pack (200) including a battery core (201), a battery tray (100), and a lid (202), The battery tray (100) is a battery tray (100) according to claim 13, A battery pack (200), characterized in that the lid body (202) and the battery tray (100) together define a mounting cavity for mounting the battery core (201), and the lid body (202) is connected to the battery tray (100).

15. A vehicle (2000) comprising the battery pack (200) of claim 14.

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