Side beams for battery trays, power battery packs and vehicles

Abstract

The present invention discloses a side beam for a battery tray, a power battery pack and a vehicle. The battery tray has a receiving cavity for receiving batteries. The side beam includes a side beam body and a reinforcement. The side beam body defines a cavity. The side beam body has a partition. The partition is arranged in the cavity and connected between the top wall and the bottom wall of the cavity to divide the cavity into a first sub-cavity and a second sub-cavity. The first sub-cavity is located between the second sub-cavity and the receiving cavity. The reinforcement is arranged in the first sub-cavity and connected between the partition and the side wall or the bottom wall of the first sub-cavity. The side beam for a battery tray according to the present invention has good anti-extrusion and anti-collision capabilities, which facilitates the power battery pack to achieve a good balance between modality and collision protection.

Description

Technical Field

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

[0002] In the related art, the battery tray includes a tray frame, and the tray frame includes multiple load-bearing beams to support the tray bottom plate of the battery tray; however, the structural design of the load-bearing beams is unreasonable, so that the load-bearing beams will undergo significant deformation when impacted, resulting in the interior of the power battery pack being easily damaged. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a side beam for a battery tray, which has good anti-extrusion and anti-collision capabilities, so as to achieve a good balance between the modal and collision protection of the power battery pack.

[0004] The present invention also provides a power battery pack having the above-mentioned side beam.

[0005] The present invention also provides a vehicle having the power battery pack.

[0006] According to the side beam for a battery tray of the first aspect of the embodiment of the present invention, the battery tray has a accommodating cavity for accommodating batteries, and the side beam comprises: a side beam body, the side beam body defines a cavity, the side beam body has a dividing portion, the dividing portion is arranged in the cavity and connected between the top wall and the bottom wall of the cavity to divide the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity is located between the second sub-cavity and the accommodating cavity; a reinforcement, the reinforcement is arranged in the first sub-cavity and connected between the dividing portion and the side wall or bottom wall of the first sub-cavity.

[0007] According to the side beam for a battery tray according to an embodiment of the present invention, a partition portion is provided to divide the cavity into a first sub-cavity and a second sub-cavity, and a reinforcement is provided in the first sub-cavity so that the reinforcement is connected between the partition portion and the side wall or bottom wall of the first sub-cavity, so as to effectively improve the structural strength and rigidity of the side beam. At the same time, the reinforcement facilitates the timely transmission and dispersion of the force acting on the side beam, so that the entire side beam can bear the load, which is beneficial to improving the force distribution of the entire side beam.

[0008] In some embodiments, in the height direction of the battery tray, the reinforcement is connected to a middle position of the dividing portion.

[0009] In some embodiments, the reinforcement member divides the first sub-cavity into a first chamber and a second chamber, the cross-sectional area of ​​the first chamber is S1, the cross-sectional area of ​​the second chamber is S2, and 0.8≤S1 / S2≤1.2.

[0010] In some embodiments, one end of the reinforcement member away from the dividing portion is connected to a side wall of the first sub-cavity that faces away from the second sub-cavity, and along a direction from the top wall of the cavity toward the bottom wall of the cavity, a side wall of the first sub-cavity that faces away from the second sub-cavity and the dividing portion are respectively inclined in directions away from each other.

[0011] In some embodiments, the included angle α between the reinforcement member and the bottom wall of the first sub-cavity satisfies: 30°≤α≤60°.

[0012] In some embodiments, the reinforcement member includes a reinforcement portion, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively bent and connected on both sides of the reinforcement portion, the first connecting portion is connected to the dividing portion, and the second connecting portion is connected to the side wall of the first sub-cavity, wherein in the height direction of the battery tray, the first connecting portion and the second connecting portion are located on the same side or different sides of the reinforcement portion.

[0013] In some embodiments, the side beam body has a supporting portion, which is located on the side of the first sub-cavity away from the second sub-cavity and includes a protruding portion and a recessed portion arranged in sequence along the width direction of the side beam body, and the protruding portion is used to support the bottom wall of the accommodating cavity.

[0014] In some embodiments, the recessed portion is provided between the raised portion and the first sub-cavity.

[0015] In some embodiments, the side beam body is an integral piece; or, the side beam body includes an upper beam body and a lower plate body, the upper beam body and the lower plate body are separate pieces, and the upper beam body defines the second sub-cavity, the lower plate body is connected to the lower end of the upper beam body and together with the upper beam body defines the first sub-cavity, the upper beam body defines the side wall of the first sub-cavity, and the lower plate body defines the bottom wall of the first sub-cavity and is fixedly connected to the bottom wall of the second sub-cavity.

[0016] In some embodiments, the side beam body includes an upper beam body and a lower plate body, one of the upper beam body and the lower plate body has a supporting portion, the supporting portion is located on a side of the first sub-cavity away from the second sub-cavity, and is used to support the bottom wall of the accommodating cavity.

[0017] In some embodiments, the support portion is formed on the upper beam body, and the support portion is fixedly connected to the lower plate body.

[0018] In some embodiments, the side beam further includes: a lifting ear, wherein the lifting ear is fixed on a side of the side beam body away from the accommodating cavity, the length of the lifting ear is less than the length of the side beam body, and both ends of the length of the lifting ear are located between the two ends of the length of the side beam body, the reinforcement is multiple and includes a first reinforcement and a second reinforcement arranged at intervals along the length direction of the side beam body, the first reinforcement and the second reinforcement are respectively located on both sides of the length of the lifting ear, and on a plane perpendicular to the width direction of the battery tray, the orthographic projection of the first reinforcement and the orthographic projection of the second reinforcement respectively overlap with the orthographic projection of the lifting ear.

[0019] A power battery pack according to an embodiment of a second aspect of the present invention comprises: a battery; a battery tray, wherein the battery tray comprises a tray bottom plate and a tray frame, the tray bottom plate comprises a main body and an extension portion, the main body defines a accommodating cavity, the battery is arranged in the accommodating cavity, the extension portion extends along a circumferential edge of the main body, the tray frame is arranged around the main body and comprises a plurality of load-bearing beams connected end to end in sequence, the load-bearing beam is located on the lower side of the extension portion, and at least one of the plurality of load-bearing beams is a side beam according to the embodiment of the first aspect of the present invention.

[0020] The power battery pack according to the embodiment of the present invention adopts the above-mentioned side beams to ensure that the power battery pack has a suitable mode, thereby improving the mechanical strength, collision protection capability and vibration resistance of the power battery pack, which is beneficial for the power battery pack to achieve a good balance between mode and collision protection so as to meet the requirements of side collision between the power battery pack and the whole vehicle.

[0021] A vehicle according to an embodiment of a third aspect of the present invention comprises a power battery pack according to an embodiment of the second aspect of the present invention.

[0022] The vehicle according to the embodiment of the present invention, by adopting the above-mentioned power battery pack, can meet the side collision requirements of the entire vehicle and ensure driving safety.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of a side beam according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1A schematic cross-sectional view of the edge beam shown in FIG.

[0027] Figure 3 yes Figure 1 Exploded view of the edge beam shown in;

[0028] Figure 4 yes Figure 3 Another exploded view of the edge beam shown in;

[0029] Figure 5 is a schematic diagram of a power battery pack according to an embodiment of the present invention;

[0030] Figure 6 yes Figure 5 Schematic diagram of the pallet bottom plate, pallet frame and expansion beam shown in;

[0031] Figure 7 yes Figure 6 Another schematic diagram of the pallet bottom plate, pallet frame and expansion beam shown in;

[0032] Figure 8 is along Figure 7 Cross-sectional view of CC;

[0033] Fig. 9 yes Figure 8 A partial enlarged view of the pallet bottom plate, pallet frame and expansion beam shown in;

[0034] Fig.10 yes Figure 7 A partial schematic diagram of one of the load beams shown in .

[0035] Reference numerals:

[0036] Power battery pack 100,

[0037] Battery tray 10, battery 20, expansion beam 30,

[0038] The tray bottom plate 101, the accommodating cavity 1010, the side wall 1010a of the accommodating cavity, the bottom wall 1010b of the accommodating cavity,

[0039] The main body 1011, the extension part 1012,

[0040] Pallet frame 102, load beam 1021,

[0041] Side beam 1,

[0042] Side beam body 11.

[0043] Cavity 110, first sub-cavity 110a, second sub-cavity 110b, first chamber 110c, second chamber 110d,

[0044] The partition 11a, the support portion 11b, the raised portion 11c, the recessed portion 11d, the upper beam body 111, the lower plate body 112,

[0045] reinforcement member 12, reinforcement portion 121, first connection portion 122, second connection portion 123,

[0046] The first reinforcement member 12a, the second reinforcement member 12b,

[0047] Lifting lugs 13. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0050] Hereinafter, referring to the accompanying drawings, the side beam 1 for the battery tray 10 according to an embodiment of the present invention is described. The battery tray 10 has a receiving cavity 1010 for receiving the battery 20, which is convenient for ensuring the stable installation of the battery 20 and at the same time plays a certain protective role for the battery 20.

[0051] like Figure 1-Figure 4 As shown, the side beam 1 includes a side beam body 11, the side beam body 11 defines a cavity 110, and the side beam body 11 has a dividing portion 11a, the dividing portion 11a is arranged in the cavity 110, and the dividing portion 11a is connected between the top wall of the cavity 110 and the bottom wall of the cavity 110 to divide the cavity 110 into a first sub-cavity 110a and a second sub-cavity 110b, and the first sub-cavity 110a and the second sub-cavity 110b can be both along the length direction of the side beam body 11 (for example, Figure 1 The first sub-cavity 110a extends in the AA' direction, the first sub-cavity 110a is located between the second sub-cavity 110b and the accommodating cavity 1010, and the second sub-cavity 110b is located on the side of the first sub-cavity 110a away from the accommodating cavity 1010.

[0052] It can be seen that the dividing portion 11a can be formed as the side wall of the first sub-cavity 110a, or as the side wall of the second sub-cavity 110b, and the dividing portion 11a can support the top wall of the cavity 110 and the bottom wall of the cavity 110 respectively, so as to improve the structural strength and rigidity of the side beam body 11, reduce the deformation risk of the side beam body 11, and help to extend the service life of the side beam 1. At the same time, it is convenient to realize the lightweight design of the side beam 1, and when the side beam 1 is used for the power battery pack 100, if the second sub-cavity 110b is hit, the second sub-cavity 110b can absorb the collision force to reduce the collision force transmitted to the power battery pack 100, thereby reducing the risk of the inside of the power battery pack 100 being damaged and improving the reliability of the power battery pack 100.

[0053] like Figure 1-Figure 4 As shown, the side beam 1 also includes a reinforcement 12, which is arranged in the first sub-cavity 110a, and the reinforcement 12 is connected between the dividing portion 11a and the side wall or bottom wall of the first sub-cavity 110a, that is, the reinforcement 12 is connected between the dividing portion 11a and the side wall of the first sub-cavity 110a, or the reinforcement 12 is connected between the dividing portion 11a and the bottom wall of the first sub-cavity 110a.

[0054] It is understandable that when the reinforcing member 12 is connected between the partition 11a and the side wall of the first sub-cavity 110a, the side wall of the first sub-cavity 110a connected to the reinforcing member 12 may be adjacent to or opposite to the partition 11a. Figure 2 In the example, the cross-sectional shape of the first sub-cavity 110a is approximately a quadrilateral (e.g., a trapezoid), and the reinforcement 12 is connected between two oppositely disposed side walls of the first sub-cavity 110a; in another example, the cross-sectional shape of the first sub-cavity 110a is approximately a triangle, and the reinforcement 12 is connected between two adjacently disposed side walls of the first sub-cavity 110a; of course, the cross-sectional shape of the first sub-cavity 110a is not limited thereto, for example, the cross-sectional shape of the first sub-cavity 110a may also be other polygons, etc.

[0055] Since the first sub-cavity 110a is located between the second sub-cavity 110b and the accommodating cavity 1010, the specific setting of the first sub-cavity 110a has a great influence on the mode of the power battery pack 100, and the specific setting of the first sub-cavity 110a has a great influence on the vibration of the power battery pack 100; if the structure of the first sub-cavity 110a is stable, the power battery pack 100 has a higher mode.

[0056] It can be seen that the reinforcement 12 can divide the first sub-cavity 110a into multiple chambers, and the reinforcement 12 can support the side walls or bottom walls of the dividing portion 11a and the first sub-cavity 110a respectively, thereby improving the structural stability of the first sub-cavity 110a and reducing the deformation risk of the first sub-cavity 110a, thereby further improving the structural strength and rigidity of the side beam 1, reducing the deformation risk of the side beam body 11, and extending the service life of the side beam 1; when the side beam 1 is used for the power battery pack 100, it can effectively improve the anti-extrusion and anti-collision capabilities of the power battery pack 100, and at the same time, it can also increase the mode of the power battery pack 100, so that the power battery pack 100 has a suitable mode, and improve the anti-vibration capability of the power battery pack 100, and reduce the probability of resonance of the power battery pack 100.

[0057] In addition, since the reinforcement 12 is connected to the dividing portion 11a, the reinforcement 12 can facilitate the transmission of force, so as to timely, smoothly and dispersedly transmit the force exerted on the second sub-cavity 110b to the first sub-cavity 110a, so as to facilitate the entire side beam 1 to bear the load, improve the material utilization rate of the side beam 1, and help improve the force distribution of the entire side beam 1, and further reduce the deformation risk of the side beam 1.

[0058] According to the side beam 1 for the battery tray 10 of the embodiment of the present invention, the cavity 110 is divided into a first sub-cavity 110a and a second sub-cavity 110b by setting a dividing portion 11a, and a reinforcement 12 is set in the first sub-cavity 110a, so that the reinforcement 12 is connected between the dividing portion 11a and the side wall or bottom wall of the first sub-cavity 110a, so as to effectively improve the structural strength and rigidity of the side beam 1. At the same time, the reinforcement 12 facilitates the timely transmission and dispersion of the force acting on the side beam 1, so that the entire side beam 1 can bear the load, which is beneficial to improve the force distribution of the entire side beam 1; when the side beam 1 is used for the power battery pack 100, it is convenient to ensure that the power battery pack 100 has a suitable mode, and improves the mechanical strength, collision protection capability and vibration resistance of the power battery pack 100, which is beneficial to make the power battery pack 100 achieve a good balance between mode and collision protection, so as to meet the requirements of side collision between the power battery pack 100 and the whole vehicle.

[0059] In some embodiments of the present invention, Figure 2 As shown, in the height direction of the battery tray 10 (for example, Figure 2 In the up and down directions), the reinforcement 12 is connected to the middle position of the dividing part 11a. Then, when one of the two ends of the dividing part 11a in the height direction of the battery tray 10 is subjected to a force, the force can be transmitted toward the other end of the two ends of the dividing part 11a in the height direction of the battery tray 10 and the reinforcement 12, respectively, to achieve dispersed transmission of the force, and facilitate reducing the difference in the size of the dispersedly transmitted force, so as to ensure that the dispersedly transmitted force is more balanced.

[0060] In some embodiments of the present invention, Figure 2 As shown, the reinforcement 12 divides the first sub-cavity 110a into a first cavity 110c and a second cavity 110d, the cross-sectional area of ​​the first cavity 110c is S1, and the cross-sectional area of ​​the second cavity 110d is S2, 0.8≤S1 / S2≤1.2, then the difference between the cross-sectional area of ​​the first cavity 110c and the cross-sectional area of ​​the second cavity 110d is small, under the premise of ensuring that the force is dispersedly transmitted through the cavity walls of the first cavity 110c and the second cavity 110d, it is easy to ensure the difference in magnitude of the force borne by the cavity wall of the first cavity 110c and the force borne by the cavity wall of the second cavity 110d, so as to further improve the force distribution of the entire side beam 1.

[0061] For example, S1 / S2=1, and the cross-sectional area of ​​the first chamber 110c is equal to the cross-sectional area of ​​the second chamber 110d; of course, S1 / S2 can also be 0.8, or 0.9, or 0.95, or 1.05, or 1.1, or 1.2, etc.

[0062] In some embodiments of the present invention, Figure 2 As shown, one end of the reinforcing member 12 away from the dividing portion 11a is connected to a side wall of the first sub-cavity 110a that is away from the second sub-cavity 110b and is away from the second sub-cavity 110b (for example Figure 2 The first sub-cavity 110a is connected to the side wall opposite to the dividing portion 11a, and in the direction along the top wall of the cavity 110 toward the bottom wall of the cavity 110, the side wall of the first sub-cavity 110a that is away from the second sub-cavity 110b and the dividing portion 11a are respectively inclined in directions away from each other, then the force transmission trend of the side wall of the first sub-cavity 110a connected to the reinforcement 12 is different from the force transmission trend of the dividing portion 11a, for example, the side wall of the first sub-cavity 110a connected to the reinforcement 12 can transmit the force transmitted from the second sub-cavity 110b obliquely downward, while the dividing portion 11a can transmit the force transmitted from the second sub-cavity 110b obliquely upward, thereby ensuring the dispersed transmission of the force acting on the side beam 1 and avoiding force concentration on the side beam 1.

[0063] exist Figure 2 In the example, the partition 11a is connected obliquely between the top wall of the cavity 110 and the bottom wall of the cavity 110, and from top to bottom, the partition 11a is inclined toward a direction away from the accommodating cavity 1010, and the first sub-cavity 110a connected to the end of the reinforcement member 12 away from the partition 11a is inclined toward a direction close to the accommodating cavity 1010. Optionally, the angle β between the partition 11a and the bottom wall of the first sub-cavity 110a satisfies 50°≤β≤70°, for example, β can be 50°, or 55°, or 60°, or 66°, or 70°, etc.

[0064] Of course, the present application is not limited thereto; in other embodiments, one end of the reinforcement member 12 away from the dividing portion 11 a is connected to the bottom wall of the first sub-cavity 110 a (eg, the lower plate body 112 described later).

[0065] In some embodiments of the present invention, Figure 2 As shown, the angle α between the reinforcement member 12 and the bottom wall of the first sub-cavity 110a satisfies 30°≤α≤60°, so as to ensure that the reinforcement member 12 transfers the force exerted on the dividing portion 11a to the side wall or bottom wall of the first sub-cavity 110a in a timely manner, facilitates the transmission of force, and ensures the dispersed transmission of force. For example, α can be 30°, 40°, 45°, 50°, 56°, 60°, etc.

[0066] For example, in Figure 2 and Figure 4 In the example, the side beam body 11 includes an upper beam body 111 and a lower plate body 112, the upper beam body 111 and the lower plate body 112 are separate parts, and the upper beam body 111 defines a second sub-cavity 110b, the lower plate body 112 is connected to the lower end of the upper beam body 111 and defines a first sub-cavity 110a together with the upper beam body 111, the upper beam body 111 defines a side wall of the first sub-cavity 110a, and the lower plate body 112 defines a bottom wall of the first sub-cavity 110a, then the angle between the reinforcement 12 and the lower plate body 112 is α. Of course, the side beam body 11 can also be an integral part.

[0067] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the reinforcing member 12 includes a reinforcing portion 121, a first connecting portion 122 and a second connecting portion 123, the first connecting portion 122 and the second connecting portion 123 are respectively connected to both sides of the reinforcing portion 121, the first connecting portion 122 is connected to the dividing portion 11a, and the second connecting portion 123 is connected to the side wall of the first sub-cavity 110a, then the reinforcing portion 121 is indirectly connected to the dividing portion 11a through the first connecting portion 122, and the reinforcing portion 121 is indirectly connected to the side wall of the first sub-cavity 110a through the second connecting portion 123, and the first connecting portion 122 and the second connecting portion 123 are connected to the side wall of the first sub-cavity 110a. The two connecting parts 123 are respectively bent and connected to the reinforcing part 121, so as to ensure the connection strength between the reinforcing part 121 and the first connecting part 122 and the second connecting part 123, and at the same time, make the bending angle of the first connecting part 122 more matched with the setting angle of the dividing part 11a, and facilitate the connection between the first connecting part 122 and the dividing part 11a, and make the bending angle of the second connecting part 123 more matched with the setting angle of the side wall of the first sub-cavity 110a, and facilitate the connection between the second connecting part 123 and the side wall of the first sub-cavity 110a.

[0068] In the height direction of the battery tray 10, the first connection portion 122 and the second connection portion 123 are located on the same side of the reinforcing portion 121 in the thickness direction, and the first connection portion 122 and the second connection portion 123 are bent and extended toward the thickness side of the reinforcing portion 121, so that the reinforcing member 12 roughly defines a C-shaped structure, which facilitates the processing of the reinforcing member 12. For example, Figure 2 and Figure 4 In the example, the first connection portion 122 and the second connection portion 123 are both bent and extended toward the lower side of the reinforcement portion 121 .

[0069] Optionally, the first connection portion 122 is fixed to the dividing portion 11 a by welding, and the second connection portion 123 is fixed to the side wall of the first sub-cavity 110 a by welding.

[0070] Of course, the present application is not limited thereto; in other embodiments, in the height direction of the battery tray 10, the first connection portion 122 and the second connection portion 123 are located on different sides of the reinforcing portion 121 in the thickness direction, and the first connection portion 122 bends and extends toward one side of the thickness of the reinforcing portion 121, while the second connection portion 123 bends and extends toward the other side of the thickness of the reinforcing portion 121, so that the reinforcing member 12 generally defines a Z-shaped structure, which facilitates the processing of the reinforcing member 12. For example, one of the first connection portion 122 and the second connection portion 123 bends and extends toward the lower side of the reinforcing portion 121, and the other bends and extends toward the upper side of the reinforcing portion 121.

[0071] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the side beam body 11 has a support portion 11b, which is located on the side of the first sub-cavity 110a away from the second sub-cavity 110b, and the first sub-cavity 110a is located between the second sub-cavity 110b and the support portion 11b; the support portion 11b includes a width direction of the side beam body 11 (for example, Figure 2 The convex part 11c and the concave part 11d are sequentially arranged along the BB' direction in the cavity 1010, the convex part 11c convexes upward and the concave part 11d concave downward, the convex part 11c is used to support the bottom wall 1010b of the accommodating cavity 1010, then the convex part 11c can be used to carry the battery 2, reduce the force on the cavity wall of the accommodating cavity 1010, and ensure the stable arrangement of the battery 2, and the concave part 11d can be spaced from the bottom wall 1010b of the accommodating cavity 1010, and the concave part 11d can improve the structural strength of the support part 11b, and ensure the bearing capacity of the support part 11b. The width direction of the side beam body 11 is perpendicular to the length direction of the side beam body 11.

[0072] It can be understood that there are one or more protrusions 11c and one or more recesses 11d.

[0073] In some embodiments, Figure 2 and Figure 4 As shown, a recessed portion 11d is provided between the raised portion 11c and the first sub-cavity 110a; if the side beam 1 is hit, the first sub-cavity 110a will bear the force transmitted from the second sub-cavity 110b, and the raised portion 11c needs to bear the gravity of the battery 2. The recessed portion 11d separates the first sub-cavity 110a from the raised portion 11c, so that the force distribution of the side beam 1 is more dispersed. The recessed portion 11d can bear the force transmitted from the first sub-cavity 110a and the force transmitted from the raised portion 11c, further ensuring that the entire side beam 1 is loaded and improving material utilization.

[0074] For example, in Figure 2 and Figure 4 In the example, there are two recessed portions 11d, one of which is located between the raised portion 11c and the first sub-cavity 110a, and the other is located on the side of the raised portion 11c away from the first sub-cavity 110a; when the support portion 11b of the side beam body 11 is a roll-formed part, the processing of the support portion 11b is convenient. In the width direction of the side beam body 11, the width of the raised portion 11c is greater than the width of the recessed portion 11d.

[0075] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the side beam body 11 includes an upper beam body 111 and a lower plate body 112, the upper beam body 111 and the lower plate body 112 are separate parts, and the upper beam body 111 defines a second sub-cavity 110b, the lower plate body 112 is connected to the lower end of the upper beam body 111, and the lower plate body 112 and the upper beam body 111 jointly define a first sub-cavity 110a, the upper beam body 111 defines the side wall of the first sub-cavity 110a, the lower plate body 112 defines the bottom wall of the first sub-cavity 110a, and the lower plate body 112 is fixedly connected to the bottom wall of the second sub-cavity 110b, so as to ensure that the lower plate body 112 and the upper beam body 111 have a larger connection area, so as to ensure the connection strength between the lower plate body 112 and the upper beam body 111.

[0076] It can be seen that, since the dividing portion 11a forms the side wall of the second sub-cavity 110b, and the upper beam body 111 defines the second sub-cavity 110b, the dividing portion 11a is formed on the upper beam body 111. Therefore, by setting the side beam body 11 to include the upper beam body 111 and the lower plate body 112, it is easy to simplify the structure of the upper beam body 111 and the lower plate body 112, and facilitate the processing of the side beam body 11.

[0077] Optionally, in Figure 4 In the example, the upper beam body 111 is an integral part, for example, the upper beam body 111 is an integral rolled part.

[0078] Of course, the present application is not limited thereto; in other embodiments, the side beam body 11 may also be an integral piece, for example, the side beam body 11 is an integral rolled piece.

[0079] In some embodiments, Figure 2 , Figure 4 and Fig. 9 As shown, the side beam body 11 includes an upper beam body 111 and a lower plate body 112, one of the upper beam body 111 and the lower plate body 112 has a support portion 11b, and the support portion 11b is formed on the upper beam body 111, or the support portion 11b is formed on the lower plate body 112, and the support portion 11b is located on the side of the first sub-cavity 110a away from the second sub-cavity 110b, and the support portion 11b is used to support the bottom wall 1010b of the accommodating cavity 1010, then the support portion 11b can be used to carry the battery 2, reduce the force on the cavity wall of the accommodating cavity 1010, and ensure that the battery 2 is stably arranged.

[0080] In some optional embodiments, such as Figure 2 and Figure 4 As shown, the support portion 11b is formed on the upper beam body 111, and the support portion 11b is fixedly connected to the lower plate body 112, which increases the connection area between the lower plate body 112 and the upper beam body 111, and further increases the connection strength between the lower plate body 112 and the upper beam body 111. At the same time, the lower plate body 112 can support the support portion 11b, so as to further ensure the stable setting of the battery 2.

[0081] For example, in Fig. 9 In the example, the support portion 11b includes a protrusion 11c and a recessed portion 11d arranged in sequence along the width direction of the side beam body 11, the protrusion 11c protrudes upward and the recessed portion 11d is recessed downward, the protrusion 11c is used to support the bottom wall 1010b of the accommodating cavity 1010, then the protrusion 11c can be used to carry the battery 2, and the recessed portion 11d can be spaced apart from the bottom wall 1010b of the accommodating cavity 1010, and the recessed portion 11d is fixedly connected to the lower plate body 112.

[0082] In some embodiments of the present invention, Figure 6 , Fig. 9 and Fig.10As shown, the side beam 1 also includes a lifting ear 13, which is fixed on the side of the side beam body 11 away from the accommodating cavity 1010. For example, the lifting ear 13 can be fixed on the side wall of the second sub-cavity 110b away from the first sub-cavity 110a; the length of the lifting ear 13 is less than the length of the side beam body 11, and both ends of the length of the lifting ear 13 are located between the two ends of the length of the side beam body 11, then the side beam body 11 can include a first body, a second body and a third body arranged in sequence along the length direction of the side beam body 11, the second body is fixed to the entire lifting ear 13, and the first body and the third body are not connected to the lifting ear 13, then the side of the first body away from the accommodating cavity 1010 and the side of the third body away from the accommodating cavity 1010 can provide a certain avoidance space for the arrangement of other vehicle components, which is convenient for realizing the compact layout of various components and ensuring space utilization.

[0083] There are multiple reinforcements 12, each of which extends along the length direction of the side beam body 11. The multiple reinforcements 12 include a first reinforcement 12a and a second reinforcement 12b arranged at intervals along the length direction of the side beam body 11. The first reinforcement 12a and the second reinforcement 12b are respectively located on both sides of the length of the ear 13, and on a plane perpendicular to the width direction of the battery tray 10, the orthographic projection of the first reinforcement 12a and the orthographic projection of the second reinforcement 12b overlap with the orthographic projection of the ear 13. It can be understood that when the battery pack is installed on the vehicle, the width direction of the battery tray can be consistent with the width direction of the vehicle.

[0084] It can be seen that on the plane perpendicular to the width direction of the battery tray 10, the orthographic projection of the first reinforcement 12a partially overlaps with the orthographic projection of the ear 13, and the orthographic projection of the second reinforcement 12b partially overlaps with the orthographic projection of the ear 13. Then, in the length direction of the side beam body 11, one end of the length of the ear 13 is located between the two ends of the length of the first reinforcement 12a, and the other end of the length of the ear 13 is located between the two ends of the length of the second reinforcement 12b, so that the first reinforcement 12a is arranged corresponding to the first body, and the first reinforcement 12a is fixedly connected to both the first body and the second body, and the second reinforcement 12b is arranged corresponding to the third body, and the second reinforcement 12b is fixedly connected to both the second body and the third body.

[0085] When the side beam 1 is subjected to a side collision, the force on the lifting ear 13 is transmitted to the side beam body 11. The force is greatest at the connection position between the lifting ear 13 and the side beam body 11. Reinforcements 12 are respectively provided at the positions where the lifting ear 13 is connected to the side beam body 11 at both ends of the length to increase the structural strength of the side beam body 11, so that the side beam 1 can effectively resist extrusion and collision, ensure the reliable use of the side beam 1, and avoid the side beam 1 squeezing the battery 20, thereby improving the anti-extrusion and anti-collision capabilities of the power battery pack 100, ensuring the safe use of the power battery pack 100, and at the same time saving the material amount of the reinforcement 12, simplifying the connection of the reinforcement 12, so as to reduce the cost of the side beam 1.

[0086] It is understandable that the length of the first reinforcement member 12 a and the length of the second reinforcement member 12 b may be equal or different. When the side beam 1 is used for the power battery pack 100 , the power battery pack 100 may be installed and fixed by the lifting lug 13 .

[0087] Optionally, in Figure 3 and Fig.10 In the example, one end of the length of the first reinforcement 12a can be flush with one end of the length of the side beam body 11, and in the length direction of the side beam body 11, the other end of the length of the first reinforcement 12a is located between the two ends of the length of the ear 13, and on the preset plane, the length L1 of the overlapping part of the orthographic projection of the first reinforcement 12a and the orthographic projection of the ear 13 is greater than or equal to 100mm; one end of the length of the second reinforcement 12b can be flush with the other end of the length of the side beam body 11, and in the length direction of the side beam body 11, the other end of the length of the second reinforcement 12b is located between the two ends of the length of the ear 13, and on the preset plane, the length L2 of the overlapping part of the orthographic projection of the second reinforcement 12b and the orthographic projection of the ear 13 is greater than or equal to 100mm. Wherein, L1 and L2 can be equal or different.

[0088] For example, in Fig. 9 and Fig.10 In the example, the side beam body 11 includes an upper beam body 111 and a lower plate body 112, the upper beam body 111 defines a second sub-cavity 110b, the lower plate body 112 is connected to the lower end of the upper beam body 111, and the lower plate body 112 and the upper beam body 111 jointly define a first sub-cavity 110a, and the ear 13 is fixed on the side of the upper beam body 111 away from the accommodating cavity 1010.

[0089] Of course, the present application is not limited thereto; in other embodiments, there is one reinforcement member 12 , and both ends of the length of the reinforcement member 12 are flush with both ends of the length of the side beam body 11 .

[0090] According to the second aspect of the embodiment of the present invention, the power battery pack 100 includes a battery 20 and a battery tray 10, the battery tray 10 includes a tray bottom plate 101 and a tray frame 102, the tray bottom plate 101 includes a main body 1011 and an extension portion 1012, the main body 1011 defines a accommodating cavity 1010, the battery 20 is arranged in the accommodating cavity 1010, the extension portion 1012 extends along the circumferential edge of the main body 1011, the tray frame 102 is arranged around the main body 1011, so that the tray frame 102 roughly defines an annular structure, the tray frame 102 includes a plurality of load-bearing beams 1021 connected end to end in sequence, the load-bearing beam 1021 is located on the lower side of the extension portion 1012, and at least one of the plurality of load-bearing beams 1021 is a side beam 1 for the battery tray 10 according to the above-mentioned first aspect of the present invention.

[0091] It can be understood that when at least two of the multiple load-bearing beams 1021 are the side beams 1 according to the embodiment of the first aspect of the present invention, the structures of the at least two load-bearing beams 1021 may be the same or different.

[0092] According to the power battery pack 100 of the embodiment of the present invention, by adopting the above-mentioned side beam 1, it is convenient to ensure that the power battery pack 100 has a suitable mode, and the mechanical strength, collision protection capability and vibration resistance of the power battery pack 100 are improved, which is beneficial for the power battery pack 100 to achieve a good balance between mode and collision protection, so as to meet the requirements of side collision of the power battery pack 100.

[0093] It should be noted that in the description of this application, "ring" is to be understood in a broad sense and is not limited to "circular ring". For example, it can also be "polygonal ring" and so on. Figure 5-Figure 7 In the example, the pallet frame 102 includes four load-bearing beams 1021, and the four load-bearing beams 1021 are connected end to end in sequence to define a quadrilateral, wherein two load-bearing beams 1021 are arranged opposite to each other in the front-to-back direction, and the other two load-bearing beams 1021 are arranged opposite to each other in the left-to-right direction, and the above-mentioned other two load-bearing beams 1021 are both side beams 1 according to the above-mentioned first aspect embodiment of the present invention, and the above-mentioned two of the load-bearing beams 1021 are not side beams 1 according to the above-mentioned first aspect embodiment of the present invention.

[0094] In some embodiments, Figure 8 and Fig. 9 As shown, each load-bearing beam 1021 is fixedly connected to the side wall 1010a and the extension portion 1012 of the accommodating cavity 1010 , for example, each load-bearing beam 1021 is fixedly bonded to the side wall 1010a and the extension portion 1012 of the accommodating cavity 1010 .

[0095] In some embodiments, the tray frame 102 is a metal part, and the tray bottom plate 101 is a composite material part, so as to ensure the structural strength of the tray bottom plate 101, so that the tray bottom plate 101 can stably carry the battery 20, and at the same time make the tray bottom plate 101 have good electrical insulation. Even if the coolant of the power battery pack leaks, etc., the risk of high-voltage arcing between the tray bottom plate 101 and the battery 20 can be avoided, thereby ensuring the normal use of the power battery pack 100.

[0096] For example, Figure 5-Figure 7 As shown, the up-down direction is the height direction of the battery tray 10, the front-to-back direction is the length direction of the battery tray 10, and the left-to-right direction is the width direction of the battery tray 10. The power battery pack 100 also includes an expansion beam 30, and the expansion beam 30 is used to abut against the battery 20. The expansion beam 30 and the battery 20 are abutted together, and the expansion beam 30 can withstand the expansion force of the battery 20; there are multiple expansion beams 30, and the multiple expansion beams 30 may include a first expansion beam, and the first expansion beam is arranged on the upper side of the extension portion 1012, and the first expansion beam and the corresponding load-bearing beam 1021 are arranged opposite to each other in the upper and lower directions, and the fasteners are passed through the first expansion beam and the extension portion 1012 and fixed to the corresponding load-bearing beam 1021 to fix the first expansion beam to the load-bearing beam 1021. Figure 5-Figure 7 In the example, there are two first expansion beams, which are respectively arranged at the front and rear side edges of the extension portion 1012 , and a battery 20 is arranged on one width side of the first expansion beam.

[0097] The multiple expansion beams 30 can also include a second expansion beam, which is arranged on the upper side of the main body 1011, and the second expansion beam is arranged between the two first expansion beams. The tray frame 102 also includes a connecting beam, which is connected between two oppositely arranged load-bearing beams 1021, and the connecting beam is arranged on the lower side of the main body 1011. The connecting beam is opposite to the second expansion beam in upper and lower directions. The fastener is passed through the second expansion beam and the main body 1011 and fixed to the connecting beam to fix the second expansion beam to the connecting beam. At this time, batteries 20 are respectively provided on both sides of the width of the second expansion beam.

[0098] The vehicle according to the third aspect of the present invention comprises the power battery pack 100 according to the second aspect of the present invention.

[0099] The vehicle according to the embodiment of the present invention adopts the above-mentioned power battery pack 100, so as to meet the side collision requirements of the whole vehicle and ensure driving safety.

[0100] Other components and operations of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0101] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0102] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A side beam for a battery tray, characterized in that: The battery tray has a receiving cavity for receiving batteries, and the side beam comprises: A side beam body, wherein the side beam body defines a cavity, and the side beam body has a dividing portion, wherein the dividing portion is disposed in the cavity and connected between a top wall and a bottom wall of the cavity to divide the cavity into a first sub-cavity and a second sub-cavity, wherein the first sub-cavity is located between the second sub-cavity and the accommodating cavity; A reinforcing member, the reinforcing member is disposed in the first sub-cavity and connected to the dividing portion and a side wall of the first sub-cavity; One end of the reinforcement member away from the dividing portion is connected to a side wall of the first sub-cavity that faces away from the second sub-cavity, and along a direction from the top wall of the cavity toward a bottom wall of the cavity, a side wall of the first sub-cavity that faces away from the second sub-cavity and the dividing portion are respectively inclined in directions away from each other.

2. The side beam for a battery tray according to claim 1, characterized in that: In the height direction of the battery tray, the reinforcement is connected to the middle position of the dividing portion.

3. The side beam for a battery tray according to claim 1, characterized in that: The reinforcement member divides the first sub-cavity into a first cavity and a second cavity, the cross-sectional area of ​​the first cavity is S1, the cross-sectional area of ​​the second cavity is S2, and 0.8≤S1 / S2≤1.

2.

4. The side beam for a battery tray according to claim 1, characterized in that: An included angle α between the reinforcement member and the bottom wall of the first sub-cavity satisfies: 30°≤α≤60°.

5. The side beam for a battery tray according to claim 1, characterized in that: The reinforcing member comprises a reinforcing portion, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively bent and connected to two sides of the reinforcing portion, the first connecting portion is connected to the dividing portion, and the second connecting portion is connected to the side wall of the first sub-cavity. Wherein, in the height direction of the battery tray, the first connecting portion and the second connecting portion are located on the same side or different sides of the reinforcing portion in the thickness direction.

6. The side beam for a battery tray according to claim 1, characterized in that: The side beam body has a supporting portion, which is located on a side of the first sub-cavity away from the second sub-cavity and includes a protruding portion and a recessed portion sequentially arranged along the width direction of the side beam body, and the protruding portion is used to support the bottom wall of the accommodating cavity.

7. The side beam for a battery tray according to claim 6, characterized in that: The recessed portion is disposed between the raised portion and the first sub-cavity.

8. The side beam for a battery tray according to claim 1, characterized in that: The side beam body is a one-piece piece; or, The side beam body includes an upper beam body and a lower plate body, the upper beam body and the lower plate body are separate parts, and the upper beam body defines the second sub-cavity, the lower plate body is connected to the lower end of the upper beam body and defines the first sub-cavity together with the upper beam body, the upper beam body defines the side wall of the first sub-cavity, and the lower plate body defines the bottom wall of the first sub-cavity and is fixedly connected to the bottom wall of the second sub-cavity.

9. The side beam for a battery tray according to claim 1, characterized in that: The side beam body includes an upper beam body and a lower plate body, one of the upper beam body and the lower plate body has a supporting portion, the supporting portion is located on a side of the first sub-cavity away from the second sub-cavity and is used to support the bottom wall of the accommodating cavity.

10. The side beam for a battery tray according to claim 9, characterized in that: The support portion is formed on the upper beam body, and the support portion is fixedly connected to the lower plate body.

11. The side beam for a battery tray according to any one of claims 1 to 10, characterized in that: Also includes: A lifting ear, wherein the lifting ear is fixed on a side of the side beam body away from the accommodating cavity, the length of the lifting ear is less than the length of the side beam body, and both ends of the length of the lifting ear are located between the two ends of the length of the side beam body, the reinforcement is multiple and includes a first reinforcement and a second reinforcement arranged at intervals along the length direction of the side beam body, the first reinforcement and the second reinforcement are respectively located on both sides of the length of the lifting ear, and on a plane perpendicular to the width direction of the battery tray, the orthographic projection of the first reinforcement and the orthographic projection of the second reinforcement respectively overlap with the orthographic projection of the lifting ear.

12. A power battery pack, characterized in that: include: Battery; A battery tray, the battery tray comprises a tray bottom plate and a tray frame, the tray bottom plate comprises a main body and an extension portion, the main body defines a accommodating cavity, the battery is arranged in the accommodating cavity, the extension portion extends along the circumferential edge of the main body, the tray frame is arranged around the main body and comprises a plurality of load-bearing beams connected end to end in sequence, the load-bearing beam is located on the lower side of the extension portion, and at least one of the plurality of load-bearing beams is a side beam according to any one of claims 1-11.

13. A vehicle, characterized in that: Comprising the power battery pack according to claim 12.

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