Tray assembly, power battery pack and vehicle

Abstract

A tray assembly (1), a power battery pack (100), and a vehicle (200) are disclosed. The tray assembly (1) includes a bottom plate (111), an expansion beam (12) and a first seal member (141), the bottom plate (111) includes a main body portion (1111) and a flange portion (1112), the main body portion (1111) defines a storage cavity (110), the storage cavity (110) stores a battery (2), the flange portion (1112) is located on the periphery of the main body portion (1111) and is installed around the main body portion (1111), the expansion beam (12) is installed on one side in the thickness direction of the flange portion (1112), and the expansion beam (12) is adapted to abut against the battery (2), and the first seal member (141) includes a first portion (141a), and the first portion (141a) is installed between the expansion beam (12) and the flange portion (1112).

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is filed based on and claims priority from a Chinese patent application having application number 202220566246.5 and filing date March 14, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of vehicles, and more particularly to a tray assembly, a power battery pack, and a vehicle. [Background technology]

[0003] In the related art, the power battery pack has poor sealing performance and cannot meet the design requirements, and the sealing installation of the power battery pack is complicated, especially when the expansion beam and the tray are separate processed parts. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems in the related art by providing a tray assembly that has excellent sealing performance and is easy to meet the sealing requirements of a power battery pack.

[0005] The present application further provides a power battery pack having the above tray assembly.

[0006] The present application further provides a vehicle having the above-described power battery pack.

[0007] A tray assembly according to an embodiment of the first aspect of the present application includes a bottom plate, an expansion beam, and a first sealing member, wherein the bottom plate includes a main body portion and a flange portion, the main body portion defines a storage cavity, the storage cavity stores a battery, the flange portion is located around the periphery of the main body portion and is installed around the main body portion, the expansion beam is installed on one side of the flange portion in a thickness direction, and the expansion beam is adapted to abut against the battery, and the first sealing member includes a first portion, which is installed between the expansion beam and the flange portion.

[0008] In the tray assembly according to the embodiment of the present application, a first sealing member is installed between the expansion beam and the flange portion to seal the gap between the flange portion and the expansion beam, thereby improving the sealing performance of the tray assembly and making it easier to meet the sealing requirements of the power battery pack.

[0009] In some embodiments, the tray assembly further includes a frame and a fastening member, the frame being positioned around the bottom plate and including a plurality of side beams arranged around the main body portion and connected at their ends in order, the side beams being positioned on the other side of the flange portion in the thickness direction and fixed to the flange portion, a first relief hole being formed in the flange portion, the fastening member being drilled in the first relief hole and fixedly connecting the expansion beam to the corresponding side beam, and the first portion being arranged around the first relief hole.

[0010] In some embodiments, the first seal member further includes a second portion, the second portion being sealed between the fastening member and a peripheral wall of the first relief hole.

[0011] In some embodiments, the frame further includes a bushing, the bushing being drilled in the first relief hole and fixed to the side beam, the bushing having a connecting hole formed therein, the fastening member being fixedly fitted into the connecting hole, and the first sealing member further including a third portion, the third portion being sealed between the bushing and the peripheral wall of the first relief hole.

[0012] In some embodiments, the tray assembly further includes a second seal member, the second seal member including the fourth portion, the fourth portion being positioned between the side beam and the flange portion.

[0013] In some embodiments, the fourth portion is disposed around the fastening member.

[0014] In some embodiments, the frame further includes a bushing, a second escape hole is formed in the side beam, the bushing is fixed to the side beam, and at least a portion of the bushing is located on one side of the second escape hole away from the flange portion, a connection hole is formed in the bushing, and the fastening member is drilled in the second escape hole and fixedly fitted into the connection hole.

[0015] In some embodiments, one end of the bushing protrudes from one side of the flange portion facing the expansion beam and abuts against the expansion beam.

[0016] In some embodiments, the bushing and the peripheral wall of the second relief hole are welded together, and the second seal member covers the welded seam of the second relief hole.

[0017] In some embodiments, the first seal member includes a third portion, the third portion being sealed between the bushing and a peripheral wall of the first relief hole, and / or the second seal member includes a fifth portion, the fifth portion being sealed between the bushing and a peripheral wall of the first relief hole.

[0018] In some embodiments, the region of the bushing that abuts the expansion beam is an annular region, and the radial distance between the outer and inner circumferential edges of the annular region is 1 mm or greater.

[0019] In some embodiments, the first seal member and the second seal member are both structural adhesives, and the thickness of the structural adhesive is t, where 0.5 mm≦t≦1 mm.

[0020] In some embodiments, the base plate is a member of insulating material.

[0021] In some embodiments, the expansion beam includes a load beam and a divider plate, the load beam defining a load cavity, the divider plate positioned in the load cavity to divide the load cavity into a first load cavity and a second load cavity, the first load cavity being located on one side of the second load cavity away from the flange portion.

[0022] In some embodiments, the tray assembly further includes a fastening member, and the expansion beam further includes a support member, which is installed in the second loading cavity and supports the partition plate and a cavity wall on one side of the second loading cavity away from the partition plate, and the fastening member is drilled through the partition plate and the second loading cavity and extends from the second loading cavity to secure the expansion beam to the side beam.

[0023] In some embodiments, the support member includes a plurality of support blocks spaced apart along the length of the load beam, and each fastener is drilled into a corresponding support block.

[0024] In some embodiments, the cross-sectional area of ​​the support member is s1 and the cross-sectional area of ​​the second loading cavity is s2, where 50%≦s1 / s2≦60%, and the cross-section of the support member and the cross-section of the second loading cavity are both perpendicular to the length of the load beam.

[0025] In some embodiments, an attachment through-hole is formed in one side of the cavity wall of the second loading cavity away from the first loading cavity, and the support member is installed in the second loading cavity, with one end of the support member abutting the partition plate and the other end being fitted into the attachment through-hole and fixedly connected to one side of the cavity wall of the second loading cavity away from the partition plate.

[0026] In some embodiments, the frame includes a bushing fixedly connected to the expansion beam and the fastening member, respectively, and an end of the bushing proximate the expansion beam abuts the support member.

[0027] A power battery pack according to an embodiment of the second aspect of the present application includes a battery, a sealing cover, and a tray assembly according to the embodiment of the first aspect of the present application, wherein the sealing cover covers the open side of the accommodating cavity and defines an installation space together with the tray assembly, and the battery is installed in the installation space.

[0028] The power battery pack according to the embodiment of the present application uses the tray assembly, which makes it easier to meet the sealing requirements of the power battery pack.

[0029] In some embodiments, the battery is multiple, the multiple batteries are arranged in sequence along a first direction, each battery extends along a second direction, the expansion beams are two, the two expansion beams are respectively installed on either side of the multiple batteries in the first direction, each expansion beam extends along the second direction, and the second direction is perpendicular to the first direction.

[0030] A vehicle according to an embodiment of the third aspect of the present application includes the power battery pack according to the embodiment of the second aspect of the present application.

[0031] The vehicle according to the embodiment of the present application uses the power battery pack, which makes it easier to ensure safety during use of the vehicle.

[0032] 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 explanation of the drawings]

[0033] The above and / or additional aspects and advantages of the present application will become more apparent and easier to understand by describing examples with reference to the following drawings.

[0034] [Figure 1] FIG. 1 is a schematic diagram of a tray assembly according to one embodiment of the present application. [Figure 2] FIG. 2 is an enlarged view of a portion B circled in FIG. [Figure 3] FIG. 2 is another schematic view of the tray assembly shown in FIG. [Figure 4] FIG. 2 is an exploded view of a tray assembly according to one embodiment of the present application. [Figure 5] 1 is a schematic diagram of a power battery pack according to one embodiment of the present application. [Figure 6] FIG. 6 is another schematic diagram of the power battery pack shown in FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view taken along line CC in FIG. 6. [Figure 8] FIG. 8 is a schematic diagram of the expansion beam shown in FIG. 7; [Figure 9] FIG. 9 is a schematic diagram of the expansion beam shown in FIG. 8. [Figure 10] FIG. 6 is another schematic diagram of the power battery pack shown in FIG. 5. [Figure 11] 1 is a schematic diagram of a vehicle according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0035] Hereinafter, the embodiments of the present application will be described in detail. 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 merely illustrative and are intended to help interpret the present application, and should not be understood as limiting the present application.

[0036] The following disclosure provides many different embodiments or examples for realizing different structures of the present application. To simplify the disclosure of the present application, specific example components and installations will be described below. It will be understood that these are merely exemplary and are not intended to limit the present application. Furthermore, the present application may repeatedly reference numbers and / or letters in different examples. Such repetition is for purposes of brevity and clarity and does not, in itself, dictate a relationship between the various embodiments and / or installations discussed. Furthermore, while the present application provides examples of various specific processes and materials, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0037] A tray assembly 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0038] As shown in Figures 1 and 4, the tray assembly 1 includes a bottom plate 111, which includes a main body portion 1111 and a flange portion 1112, which defines a receiving cavity 110, which receives the battery 2 and facilitates stable installation of the battery 2, while the bottom plate 111 can provide protection for the battery 2, and the flange portion 1112 is located around the main body portion 1111 and is installed around the main body portion 1111, and thus the flange portion 1112 can roughly define a ring-shaped structure.

[0039] In the description of the present application, the term "annular" should be understood in a broad sense, that is, it is not limited to a "circular annular" shape, but may also be, for example, a "polygonal annular" shape.

[0040] The tray assembly 1 further includes an expansion beam 12, which is installed on one side of the flange portion 1112 in the thickness direction, and is adapted to abut against the battery 2; for example, the expansion beam 12 may be in direct contact with the battery 2, or another member may be installed between the expansion beam 12 and the battery 2 so that the expansion beam 12 abuts against the battery 2 indirectly, and the expansion beam 12 is susceptible to the expansion force of the battery 2.

[0041] As described above, the expansion beam 12 and the bottom plate 111 are separate processed members.

[0042] 2 and 8, the tray assembly 1 further includes a first sealing member 141, which includes a first portion 141a that is disposed between the expansion beam 12 and the flange portion 1112. The first sealing member 141 may be disposed partially or entirely between the expansion beam 12 and the flange portion 1112 to seal the gap between the expansion beam 12 and the flange portion 1112, thereby providing the tray assembly 1 with excellent sealing performance. Therefore, when the tray assembly 1 is used in the power battery pack 100, it easily meets the sealing requirements of the power battery pack 100, ensuring that the power battery pack 100 has excellent dustproof and waterproof performance. Furthermore, the first sealing member 141 is easy to install, and the operating space is large.

[0043] In the tray assembly 1 according to the embodiment of the present application, the first part 141a of the first sealing member 141 is installed between the expansion beam 12 and the flange portion 1112 to seal the gap between the flange portion 1112 and the expansion beam 12, thereby improving the sealing performance of the tray assembly 1 and making it easier to meet the sealing requirements of the power battery pack 100.

[0044] In some embodiments, as shown in Figures 4, 7 and 8, the tray assembly 1 further includes a frame 112, which is located around the bottom plate 111 and is installed around the main body portion 1111, and includes a plurality of side beams 1121 connected at their ends in sequence to define a ring-shaped structure to facilitate stable support of the bottom plate 111, and the side beams 1121 are located on the other side of the flange portion 1112 in the thickness direction and are fixed to the flange portion 1112, and thus the expansion beam 12 and the side beams 1121 are located on different sides of the flange portion 1112 in the thickness direction.

[0045] Preferably, the side beams 1121 are made of rolled steel members. There may be Of course, in other embodiments, the side beams 1121 may be aluminum members.

[0046] 8, a first relief hole 1112a is formed in the flange portion 1112, and the tray assembly 1 further includes a fastening member 13 that is drilled into the first relief hole 1112a and fixedly connects the expansion beam 12 to the side beam 1121. In this way, the first relief hole 1112a can avoid the fastening member 13 and ensure that the expansion beam 12 and the corresponding side beam 1121 are smoothly fixed by the fastening member 13. The first portion 141a is disposed around the first relief hole 1112a, that is, the portion of the first seal member 141 disposed between the expansion beam 12 and the flange portion 1112 is disposed around the first relief hole 1112a.

[0047] In some embodiments, the first sealing member 141 further includes a second portion that is sealed between the fastening member 13 and the peripheral wall of the first escape hole 1112a, and the first sealing member 141 ensures sealing performance between the expansion beam 12 and the flange portion 1112, as well as sealing between the fastening member 13 and the flange portion 1112, further improving the sealing performance of the tray assembly 1.

[0048] Preferably, the first seal member 141 is a structural adhesive. Structural adhesives have excellent strength, corrosion resistance, and stable performance, which helps ensure the service life of the tray assembly 1 and bond the expansion beam 12 to the flange portion 1112, thereby enhancing the connection strength between the expansion beam 12 and the flange portion 1112. The thickness of the first seal member 141 is t1, and is 0.5 mm≦t1≦1 mm. This prevents the first seal member 141 from being too thin, making it difficult to control the processing, and also prevents the first seal member 141 from being too thick, which would affect the adhesive effect of the structural adhesive. For example, the thickness of the first seal member 141 may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm. Of course, in other embodiments, the first seal member 141 may be a sealing ring, such as a rubber ring.

[0049] Preferably, when the first sealing member 141 is a structural adhesive, during the process of assembling the tray assembly 1, the structural adhesive is liquid, and when the structural adhesive is placed between the expansion beam 12 and the flange portion 1112, the pressure between the expansion beam 12 and the flange portion 1112 causes the structural adhesive to easily overflow between the fastening member 13 and the first escape hole 1112a, so that when the structural adhesive hardens to become the first sealing member 141, the first portion 141a of the first sealing member 141 is sealed between the expansion beam 12 and the flange portion 1112, and the second portion of the first sealing member 141 is easily sealed between the fastening member 13 and the first escape hole 1112a.

[0050] 8, the frame 112 further includes a bushing 1122, which is drilled in the first escape hole 1112a and fixed to the side beam 1121, and which has a connecting hole 1122a formed therein, and the fastening member 13 is fixedly fitted into the connecting hole 1122a. The first seal member 141 further includes a third portion 141c, which is sealed between the bushing 1122 and the peripheral wall of the first escape hole 1112a to achieve a seal between the bushing 1122 and the flange portion 1112 and further improve the sealing performance of the tray assembly 1. In this case, the bushing 1122 may be drilled in the first escape hole 1112a.

[0051] In some embodiments, as shown in FIG. 8 , the tray assembly 1 further includes a second sealing member 142, which includes a fourth portion 142a, which is disposed between the side beam 1121 and the flange portion 1112. In this manner, the second sealing member 142 is disposed partially or entirely between the side beam 1121 and the flange portion 1112, sealing the gap between the side beam 1121 and the flange portion 1112, which further improves the sealing performance of the tray assembly 1 and is advantageous in ensuring that the power battery pack 100 has excellent dustproof and waterproof performance, etc.

[0052] In some embodiments, as shown in Figures 2 to 4 and 8, the fourth portion 142a is installed around the fastening member 13, i.e., the portion of the second seal member 142 installed between the side beam 1121 and the flange portion 1112 is installed around the fastening member 13, so that portions of the second seal member 142 are installed on one side of the fastening member 13 that is close to the accommodating cavity 110 and one side that is away from the accommodating cavity 110. In this way, the portion of the second seal member 142 located on one side of the fastening member 13 that is close to the accommodating cavity 110 is sealed between the side beam 1121 and the expansion beam 12, and the portion of the second seal member 142 located on one side of the fastening member 13 that is away from the accommodating cavity 110 is also sealed between the side beam 1121 and the expansion beam 12, thereby realizing a double seal in the fastening member 13 and easily improving the sealing performance of the tray assembly 1.

[0053] Preferably, the fastening member 13 is a bolt.

[0054] Preferably, if the second sealing member 142 is a structural adhesive, during the process of assembling the tray assembly 1, the structural adhesive is liquid, and the fastening member 13 presses the structural adhesive when fixedly connecting the expansion beam 12 and the side beam 1121. Therefore, after the structural adhesive hardens, the second sealing member 142 is likely to become an integral member, which is likely to improve the installation reliability of the second sealing member 142.

[0055] In some embodiments, as shown in FIG. 8, the frame 112 further includes a bushing 1122, a second escape hole 1121a is formed in the side beam 1121, the bushing 1122 is fixed to the side beam 1121, and at least a portion of the bushing 1122 is located on one side of the second escape hole 1121a away from the flange portion 1112, a connecting hole 1122a is formed in the bushing 1122, and the fastening member 13 is drilled through the second escape hole 1121a and the connecting hole 1122a, and is fixedly fitted into the connecting hole 1122a. In this way, the fastening member 13 and the bushing 1122 are fixedly connected, thereby fixing the expansion beam 12 to the corresponding side beam 1121.

[0056] As a result, the bush 1122 is installed on the side beam 1121, and the expansion beam 12 and the bush 1122 are fixedly connected by the fastening member 13, thereby fixedly connecting the expansion beam 12 and the side beam 1121. This eliminates the need to separately process the connection hole 1122a in the side beam 1121, which is advantageous for simplifying the structure of the side beam 1121 and facilitating the installation of the connection hole 1122a. Furthermore, the bush 1122 is at least partially located on one side of the second escape hole 1121a away from the flange portion 1112, which is advantageous for increasing the length of the fastening member 13 extending from the expansion beam 12, thereby increasing the connection strength between the side beam 1121 and the expansion beam 12 to a certain extent.

[0057] In some embodiments, as shown in FIG. 8, one end of the bushing 1122 protrudes from one side of the flange portion 1112 toward the expansion beam 12, and the above-mentioned one end of the bushing 1122 abuts against the expansion beam 12. In this way, the bushing 1122 has one end passing through the first escape hole 1112a and the second escape hole 1121a and abutting against the expansion beam 12, which makes it easy to abut tightly against the expansion beam 12 under the action of the fastening member 13, which is advantageous to further increase the connection strength between the side beam 1121 and the expansion beam 12.

[0058] In some embodiments, as shown in FIG. 8, the bushing 1122 and the peripheral wall of the second relief hole 1121a are welded and fixed, and the second seal member 412 covers the welded seam of the second relief hole 1121a, thereby ensuring the sealing performance between the side beam 1121 and the flange portion 1112 and also preventing the bushing 1122 from being damaged. 1122 and the side beams 1121, thereby further improving the sealing performance of the tray assembly 1.

[0059] Preferably, the second seal member 142 is a structural adhesive, which has excellent strength, corrosion resistance, and stable performance, thereby ensuring the service life of the tray assembly 1 and adhering the side beam 1121 to the flange portion 1112 to enhance the connection strength between the side beam 1121 and the flange portion 1112. The second seal member 142 has a thickness t2, which is 0.5 mm≦t2≦1 mm. This prevents the second seal member 142 from being too thin, making it difficult to control the processing, and also prevents the second seal member 142 from being too thick, which could affect the adhesive effect of the structural adhesive. For example, the thickness of the first seal member 141 may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm.

[0060] 8, the first seal member 141 includes a third portion 141c, which is sealed between the bushing 1122 and the peripheral wall of the first relief hole 1112a, and / or the second seal member 142 includes a fifth portion 142c, which is sealed between the bushing 1122 and the peripheral wall of the first relief hole 1112a. Thus, the present invention provides the following solutions 1 to 3. 1. The first seal member 141 includes a third portion 141c, which is sealed between the bushing 1122 and the peripheral wall of the first relief hole 1112a. 2. The second seal member 142 includes a fifth portion 142c, which is sealed between the bushing 1122 and the peripheral wall of the first relief hole 1112a. 3. The first seal member 141 includes a third portion 141c, and the second seal member 142 includes a fifth portion 142c, and both the third portion 141c and the fifth portion 142c are sealed between the bushing 1122 and the peripheral wall of the first escape hole 1112a. As described above, the first seal member 141 and / or the second seal member 142 also ensure a seal between the bushing 1122 and the flange portion 1112, further improving the sealing performance of the tray assembly 1.

[0061] Preferably, when the first seal member 141 and the second seal member 142 are both sealed between the bushing 1122 and the peripheral wall of the first escape hole 1112a, the first seal member 141 and the second seal member 142 may be connected as an integral member to further improve the sealing performance of the tray assembly 1. Naturally, when a portion of the first seal member 141 and a portion of the second seal member 142 are sealed between the bushing 1122 and the peripheral wall of the first escape hole 1112a, the first seal member 141 and the second seal member 142 may be connected as an integral member.

[0062] Preferably, a gap p is pre-set between the bushing 1122 and the peripheral wall of the first escape hole 1112a, and is 0.5 mm≦p≦1 mm. In this way, during the process of assembling the tray assembly 1, it is ensured that the first sealing member 141 and / or the second sealing member 142 overflows between the bushing 1122 and the peripheral wall of the first escape hole 1112a, making it easier to achieve sealing between the bushing 1122 and the peripheral wall of the first escape hole 1112a.

[0063] In some embodiments, as shown in FIG. 8, the area of ​​the bushing 1122 that abuts the expansion beam 12 is an annular area, and the radial distance between the outer and inner edges of the annular area is 1 mm or more, thus helping to ensure that the bushing 1122 effectively abuts the expansion beam 12.

[0064] In the description of this application, "annular" should be understood in a broad sense, i.e., it is not limited to "circular annular" and may be, for example, a "polygonal annular" and thus the "annular region" may be a circular annular region or a polygonal annular region, etc. In the example of Figure 8, the annular region of the bushing 1122 that abuts against the expansion beam 12 is an annular region, and the radial distance between the outer circumferential edge and the inner circumferential edge of the annular region is y, where y is 1 mm or more.

[0065] In some embodiments, the first seal member 141 and the second seal member 142 are made of a structural adhesive, which has excellent strength, corrosion resistance, and stable performance, thereby ensuring the service life of the tray assembly 1. The thickness of the structural adhesive is t, and is 0.5 mm≦t≦1 mm. This avoids the structural adhesive being too thin, which would make it difficult to control the processing, and avoids the structural adhesive being too thick, which would affect the adhesive's adhesive effect. For example, the thickness of the structural adhesive may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm.

[0066] In some embodiments, the bottom plate 111 is an insulating material member, and thus the bottom plate 111 has excellent electrical insulation properties, and even if the coolant of the power battery pack 100 leaks, the risk of high-voltage arc discharge occurring between the bottom plate 111 and the battery 2 can be avoided, and the normal use of the power battery pack 100 can be ensured.

[0067] Preferably, the bottom plate 111 is a composite material member, which ensures the electrical insulation of the bottom plate 111 and also makes it easy to ensure the structural strength of the bottom plate 111 so that the bottom plate 111 can stably load the batteries 2 .

[0068] 2, 3, 8 and 9, the expansion beam 12 includes a load beam 1201 and a partition plate 1202, the load beam 1201 defines a load cavity 1201a, the partition plate 1202 is installed in the load cavity 1201a to divide the load cavity 1201a into a first load cavity 1201b and a second load cavity 1201c, the first load cavity 1201b is located on one side of the second load cavity 1201c away from the flange portion 1112. As described above, when the expansion beam 12 is used, the partition plate 1202 plays a role in transmitting expansion force, which can ensure the load capacity of the expansion beam 12.

[0069] For example, in the example of FIG. 8, the first seal member 141 is installed at least between the load beam 1201 and the flange portion 1112.

[0070] In some embodiments, as shown in Figures 3 and 7, the partition plate 1202 is installed horizontally, and the height of the first loading cavity 1201b is equal to the height of the second loading cavity 1201c. For example, in the vertical direction, the partition plate 1202 is substantially located in the center of the loading cavity 1201a. When the battery 2 expands, the deformation of the center of the battery 2 in the vertical direction is the largest. In this way, the installation position of the partition plate 1202 can better adapt to the deformation distribution of the battery 2 and ensure that the expansion beam 12 can stably bear the expansion force of the battery 2.

[0071] For example, the surface of the expansion beam 12 facing the battery 2 receives the expansion force of the battery 2, and the closer the surface of the expansion beam 12 is to the middle position, the greater the force it receives. By setting the height of the first loading cavity 1201b to be equal to the height of the second loading cavity 1201c, it is easy to ensure that the partition plate 1202 transmits the expansion force stably.

[0072] In some embodiments, as shown in Figures 3 and 7, in the cross section of the expansion beam 12, the load beam 1201 and the partition plate 1202 define a square-shaped structure. Thus, the cross section of the load beam 1201 is a rectangular structure, and two sides of the width of the load beam 1201 may be formed to be approximately flat, and at least one of the two sides may be installed facing the battery 2 to form a loading surface. In this way, since the loading surface is flat, the stress on the expansion beam 12 is uniform, which is advantageous to avoid stress concentration due to uneven stress on the expansion beam 12, reduce the risk of the expansion beam 12 bending, and effectively ensure the structural safety of the tray assembly 1. The cross section of the expansion beam 12 is perpendicular to the length direction of the expansion beam 12.

[0073] As can be understood, during the process of installing and using the expansion beam 12, if the expansion beam 12 interferes with other structures such as cooling pipes, a relief portion can be installed in the load beam 1201 to ensure smooth installation of the expansion beam 12, provided that the structural strength of the load beam 1201 is ensured.

[0074] In some embodiments, as shown in FIGS. 3 and 7, the load beam 1201 and the partition plate 1202 are integrally bent members, which requires a relatively small number of bends, simplifies the bending process, and reduces processing costs.

[0075] For example, in the example of FIG. 9, in the folding process, the loading beam 1201 and the partition plate 1202 need to be folded seven times for the front expansion beam 12 and the middle expansion beam 12, which is a simple and convenient process.

[0076] In some embodiments, as shown in Figures 2 and 3, the partition plate 1202 has a dividing portion 1202a and a connecting portion 1202b, the dividing portion 1202a is located between the first loading cavity 1201b and the second loading cavity 1201c, the connecting portion 1202b is installed at at least one of the opposing ends of the dividing portion 1202a, the connecting portion 1202b is stacked with the cavity wall of the loading cavity 1201a and fixedly connected to the cavity wall of the loading cavity 1201a, and the length of the connecting portion 1202b in the normal direction of the dividing portion 1202a is x, and 6 mm≦x≦12 mm. Therefore, by rationally setting the length of the connection portion 1202b, the connection area between the connection portion 1202b and the cavity wall of the loading cavity 1201a can be guaranteed, thereby ensuring the connection strength between the connection portion 1202b and the cavity wall of the loading cavity 1201a and ensuring that the partition plate 1202 is installed stably.

[0077] When connecting portions 1202b are provided at both opposing ends of divided portion 1202a, the lengths of the two connecting portions 1202b may be equal or different.

[0078] As can be understood, when the load beam 1201 and the partition plate 1202 are integrally bendable members, by setting the length of the connection portion 1202b within the range of 6 mm to 12 mm, it is easy to ensure that the partition plate 1202 is easy to bend, which is advantageous in reducing the difficulty of processing.In this case, since there is a portion that overlaps only the steel plate corresponding to the expansion beam 12 of the connection portion 1202b, the amount of material used for the expansion beam 12 of the present application is small and the cost is low.

[0079] Preferably, the connection portion 1202b is welded and fixed to the cavity wall of the loading cavity 1201a, thus making it easier to ensure that there is a sufficient welding area between the connection portion 1202b and the cavity wall of the loading cavity 1201a, thereby ensuring the welding strength between the connection portion 1202b and the cavity wall of the loading cavity 1201a and improving the structural stability of the loading cavity 1201a.

[0080] In some embodiments, as shown in FIG. 8, the tray assembly 1 further includes a fastening member 13, and the expansion beam 12 further includes a support member 1203, which is installed in the second loading cavity 1201c and supports the partition plate 1202 and one side cavity wall of the second loading cavity 1201c that is away from the partition plate 1202. In this way, the support member 1203 plays a good supporting role for the second loading cavity 1201c, effectively ensuring the structural stability of the second loading cavity 1201c during the process of installing or using the expansion beam 12, and preventing the second loading cavity 1201c from being significantly deformed, thereby ensuring the reliability of use of the expansion beam 12. The fastening member 13 is drilled into the partition plate 1202 and the second loading cavity 1201c, and extends from the second loading cavity 1201c to fix the expansion beam 12 to the side beam 1121. Since the support member 1203 is installed in the second loading cavity 1201c, the support member 1203 bears the fastening force of the fastening member 13, preventing the partition plate 1202 from being easily deformed due to excessive fastening force, thereby effectively ensuring the loading capacity of the expansion beam 12.

[0081] As described above, in the present application, the installation of the support member 1203 is advantageous in reducing the installation requirements for the fastening member 13, that is, when installing the fastening member 13, there is no need to consider that the fastening force will cause the partition plate 1202 to deform significantly, making it easier to install the fastening member 13.

[0082] For example, in the example of FIG. 9, a relief through hole 1201e is formed in one cavity wall of the first loading cavity 1201b away from the second loading cavity 1201c, and a plane perpendicular to the axial direction of the relief through hole 1201e is taken as a projection plane, and the orthogonal projection of the hole wall of the relief through hole 1201e onto the projection plane is located outside the outer contour of the orthogonal projection of the fastening member 13 onto the projection plane. As a result, the fastening member 13 passes through the relief through hole 1201e. The fastening member 13 is a bolt, and a through hole is formed in the partition plate 1202. The fastening member 13 is drilled into the through hole, with one end abutting against one side of the partition plate 1202 away from the second loading cavity 1201c, and the other end located outside the second loading cavity 1201c, and the other end of the fastening member 13 is fixedly connected to the side beam 1121.

[0083] In some embodiments, as shown in Figures 3 and 8, the fastening members 13 are drilled into the support member 1203, i.e., through holes are formed in the support member 1203, and the fastening members 13 are drilled into the through holes and extend from the through holes to be fixedly connected to the side beams 1121. At this time, the edges of the through holes can both stably bear the fastening force, so that the stresses in the support member 1203 and the fastening members 13 are uniform, which is advantageous in further preventing the partition plate 1202 from being significantly deformed.

[0084] Of course, the present application is not limited thereto, and in other embodiments, the support member 1203 includes a plurality of support blocks 1203a, which are spaced apart along the second direction, and the fastening member 13 is installed between two adjacent support blocks 1203a, so that these two adjacent support blocks 1203a can receive the fastening force of the fastening member 13.

[0085] Preferably, when the through hole is a circular hole, the diameter of the through hole is equal to or larger than the outer diameter of the fastening member 13 .

[0086] In some embodiments, the support member 1203 includes a plurality of support blocks 1203a, which are spaced apart along the length of the load beam 1201, and each fastening member 13 is drilled into the corresponding support block 1203a, and the fastening members 13 are spaced apart along the second direction, which makes it easier to ensure that the entire expansion beam 12 is fixed and that the entire partition plate 1202 is not significantly deformed.

[0087] As can be understood, the number of support blocks 1203a may be equal to or greater than the number of fastening members 13. Preferably, the number of support blocks 1203a is n, where 4≦n≦8, but is not limited thereto.

[0088] In some embodiments, the cross-sectional area of ​​the support member 1203 is s1, the cross-sectional area of ​​the second loading cavity 1201c is s2, and 50%≦s1 / s2≦60%, and the cross-section of the support member 1203 and the cross-section of the second loading cavity 1201c are both perpendicular to the length direction of the loading beam 1201. As a result, the cross-sectional areas of the support member 1203 and the second loading cavity 1201c are relatively reasonable in size, which makes it easy to smoothly install the support block 1203a into the second loading cavity 1201c and ensures that the support member 1203 has good loading capacity.

[0089] Preferably, s1 / s2 may be 0.5, 0.52, 0.53, 0.55, 0.58, 0.6, or the like.

[0090] In some embodiments, as shown in FIGS. 8 and 9, a mounting through-hole 1201d is formed in one cavity wall of the second loading cavity 1201c away from the first loading cavity 1201b, and a support member 1203 is installed in the second loading cavity 1201c, one end of the support member 1203 abuts against the partition plate 1202 and the other end is fitted into the mounting through-hole 1201d, and the other end of the support member 1203 is connected to the partition plate of the second loading cavity 1201c. 1202 The support member 1203 is fixedly connected (e.g., welded) to the cavity wall on the side away from the second loading cavity 1201c, thereby ensuring that the support member 1203 effectively supports the second loading cavity 1201c, preventing the second loading cavity 1201c from being significantly deformed, and preventing the support member 1203 from shifting relative to the second loading cavity 1201c, ensuring that the support member 1203 is stably installed. In this case, the first seal member 141 may be installed between the loading beam 1201 and the flange portion 1112, and between the support member 1203 and the flange portion 1112.

[0091] Preferably, a plane perpendicular to the axial direction of the mounting through hole 1201d is used as the projection plane, and the orthogonal projection of the hole wall of the mounting through hole 1201d onto the projection plane is located outside the outer contour of the orthogonal projection of the support member 1203 onto the projection plane, so that the support member 1203 is adapted to pass through the mounting through hole 1201d and be placed in the second loading cavity 1201c, i.e., the mounting through hole 1201d can allow the support member 1203 to pass through so as to mount the support member 1203. Of course, the installation of the support member 1203 is not limited to this. In other embodiments, the support member 1203 may be positioned in the second loading cavity 1201c through one end of the second loading cavity 1201c in the second direction, and in this case, both ends of the support member 1203 in the first direction may abut against corresponding cavity walls of the second loading cavity 1201c, thereby similarly achieving effective support of the second loading cavity 1201c by the support member 1203.

[0092] In some embodiments, as shown in FIG. 8, the frame 112 includes a bushing 1122, which is fixedly connected to the expansion beam 12 and the fastening member 13, respectively, and one end of the bushing 1122 close to the expansion beam 12 abuts against the support member 1203, and the bushing 1122 abuts tightly against the support member 1203 under the action of the fastening member 13, which is advantageous to further increase the connection strength between the side beam 1121 and the expansion beam 12.

[0093] Preferably, the bushing 1122 is fixed to the side beam 1121 by welding.

[0094] Preferably, the area of ​​the bushing 1122 that abuts against the support member 1203 is an annular area, and the radial distance between the outer and inner edges of the annular area is 1 mm or more, thus helping to ensure that the bushing 1122 abuts against the support member 1203 effectively.

[0095] Preferably, the wall thickness of the bushing 1122 is equal to the wall thickness of the support member 1203 .

[0096] As shown in FIG. 10, a power battery pack 100 according to an embodiment of the second aspect of the present application includes a battery 2, a sealing cover 3, and the tray assembly 1 according to the embodiment of the first aspect of the present application, wherein the sealing cover 3 covers the open side of the accommodating cavity 110 and defines an installation space 100a together with the tray assembly 1, and the battery 2 is installed in the installation space 100a.

[0097] The power battery pack 100 according to the embodiment of the present application uses the tray assembly 1 described above, which makes it easier to meet the sealing requirements of the power battery pack 100.

[0098] In some embodiments, as shown in FIGS. 1, 3, 5, and 7, there are a plurality of batteries 2, the plurality of batteries 2 are arranged along a first direction (e.g., the AA′ direction in FIG. 5), each battery 2 extends along a second direction (e.g., the DD′ direction in FIG. 5), the second direction is perpendicular to the first direction, and the expansion beam 12 is formed of two There may be,The two expansion beams 12 are respectively installed on both sides of the plurality of batteries 2 in the first direction, i.e., one expansion beam 12 is installed on one side of the plurality of batteries 2 in the first direction, and the other expansion beam 12 is installed on the other side of the plurality of batteries 2 in the first direction, the direction of the expansion force of the batteries 2 is substantially parallel to the first direction, and each expansion beam 12 extends along the second direction so as to receive the expansion force of the entire battery 2.

[0099] By installing an expansion beam 12 on each side of the arrangement direction of the multiple batteries 2, a small number of expansion beams 12 can be used to more easily withstand the expansion force of the batteries 2, ensuring the safety of the power battery pack 100 during use.

[0100] As shown in FIG. 11, a vehicle 200 according to an embodiment of the third aspect of the present invention includes the power battery pack 100 according to the embodiment of the second aspect of the present invention.

[0101] The vehicle 200 according to the embodiment of the present application uses the power battery pack 100, which makes it easier to ensure safety during use of the vehicle.

[0102] Other aspects of the configuration and operation of vehicle 200 according to embodiments of the present application are known to those skilled in the art and will not be described in detail herein.

[0103] In the description of this application, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on orientations or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application. They do not indicate or suggest that the depicted devices or components must have a specific orientation, be configured, and operate in a specific orientation, and should not be understood as limiting this application. Furthermore, features qualified by "first" or "second" may explicitly or implicitly include one or more of the same feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0104] In the description of this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or communication between two parts. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0105] In the description herein, when a description refers to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples," it means that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description herein, 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 in any one or more embodiments or examples, as appropriate.

[0106] 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 purposes of the present application, and that the scope of the present application is limited by the claims and their equivalents. [Explanation of symbols]

[0107] 200 vehicles 100 Power Battery Packs 2 batteries 3 Seal cover 1 Tray Assembly 11 Tray 110 Storage cavity 111 Bottom plate 112 frames 1121 Side beam 1121a No. 2 Relief hole 1122 Bush 1122a Connection hole 1111 Main body 1112 Flange part 1112a No. 1 Relief hole 12 Expansion Beam 1201 Loading beam 1201a Loading cavity 1201b First Loading Cavity 1201c Second Loading Cavity 1201d Mounting through hole 1201e Relief through hole 1202 Partition 1202a Split part 1202b Connection 1203 Support member 1203a Support block 13 Fastening members 141 first seal member 141a Part 1 141c Part 3 142 second seal member 142a Part 4 142b Part 5 142c Part 5

Claims

1. A tray assembly (1) comprising a base plate (111), an expansion beam (12) and a first seal member (141), The bottom plate (111) includes a main body portion (1111) and a flange portion (1112), the main body portion (1111) defines a receiving cavity (110), the receiving cavity (110) receives a battery (2), the flange portion (1112) is located on the periphery of the main body portion (1111) and is installed around the main body portion (1111), The expansion beam (12) is installed on one side of the flange portion (1112) in the thickness direction, and the expansion beam (12) is adapted to abut against the battery (2); The tray assembly (1) is characterized in that the first seal member (141) includes a first portion (141a), and the first portion (141a) is installed between the expansion beam (12) and the flange portion (1112).

2. Further comprising a frame (112) and a fastening member (13); The frame (112) is located around the bottom plate (111) and is installed around the main body (1111), and the frame (112) includes a plurality of side beams (1121) whose leading and trailing ends are connected in order, and the side beams (1121) are located on the other side of the flange (1112) in the thickness direction and fixed to the flange (1112), and a first escape hole (1112a) is formed in the flange (1112), The tray assembly (1) of claim 1, characterized in that the fastening member (13) is drilled into the first escape hole (1112a) and fixedly connects the expansion beam (12) to the corresponding side beam (1121), and the first portion (141a) is positioned around the first escape hole (1112a).

3. The tray assembly (1) of claim 2, characterized in that the first seal member (141) further includes a second portion, the second portion being sealed between the fastening member (13) and the peripheral wall of the first escape hole (1112a).

4. The frame (112) further includes a bush (1122), which is drilled in the first escape hole (1112a) and fixed to the side beam (1121), a connection hole (1122a) is formed in the bush (1122), and the fastening member (13) is fixedly fitted into the connection hole (1122a); The tray assembly (1) of claim 2, characterized in that the first seal member (141) further includes a third portion (141c), which is sealed between the bush (1122) and the peripheral wall of the first escape hole (1112a).

5. further comprising a second seal member (142); The tray assembly (1) of claim 4, characterized in that the second seal member (142) includes a fourth portion (142a), the fourth portion (142a) being installed between the side beam (1121) and the flange portion (1112).

6. 6. The tray assembly (1) according to claim 5, wherein said fourth portion (142a) is disposed around said fastening member (13).

7. The tray assembly (1) of claim 5, characterized in that the frame (112) further includes a bush (1122), a second escape hole (1121a) is formed in the side beam (1121), the bush (1122) is fixed to the side beam (1121), at least a portion of the bush (1122) is located on one side of the second escape hole (1121a) away from the flange portion, a connection hole (1122a) is formed in the bush (1122), and the fastening member (13) is drilled in the second escape hole (1121a) and fixedly engaged in the connection hole (1122a).

8. The tray assembly (1) of claim 4, characterized in that one end of the bush (1122) protrudes from one side of the flange portion (1112) toward the expansion beam (12) and abuts against the expansion beam (12).

9. The tray assembly (1) of claim 7, characterized in that the bush (1122) and the peripheral wall of the second escape hole (1121a) are welded and fixed, and the second seal member (142) covers the weld seam of the second escape hole (1121a).

10. the first seal member (141) includes a third portion (141c), the third portion (141c) being sealed between the bushing (1122) and the peripheral wall of the first relief hole (1112a); and / or The tray assembly (1) of claim 5, characterized in that the second seal member (142) includes a fifth portion (142c), which is sealed between the bush (1122) and the peripheral wall of the first escape hole (1112a).

11. The tray assembly (1) of claim 4, characterized in that the area of ​​the bushing (1122) that abuts against the expansion beam (12) is an annular area, and the radial distance between the outer peripheral edge and the inner peripheral edge of the annular area is 1 mm or more.

12. 6. The tray assembly (1) of claim 5, wherein the first seal member (141) and the second seal member (142) are both structural adhesives, and the thickness of the structural adhesive is t, where 0.5 mm≦t≦1 mm.

13. 2. The tray assembly (1) according to claim 1, wherein the bottom plate (111) is made of an insulating material.

14. 2. The tray assembly (1) of claim 1, wherein the expansion beam (12) includes a load beam (1201) and a partition plate (1202), the load beam (1201) defining a load cavity (1201a), the partition plate (1202) being installed in the load cavity (1201a) and dividing the load cavity (1201a) into a first load cavity (1201b) and a second load cavity (1201c), the first load cavity (1201b) being located on one side of the second load cavity (1201c) away from the flange portion (1112).

15. The expansion beam (12) further comprises a fastening member (13). The tray assembly (1) of claim 14 further includes a support member (1203) that is installed in the second loading cavity (1201c) and supports the partition plate (1202) and a cavity wall on one side of the second loading cavity (1201c) that is away from the partition plate (1202), and the fastening member (13) is drilled through the partition plate (1202) and the second loading cavity (1201c) and extends from the second loading cavity (1201c) to fix the expansion beam (12) to the side beam (1121).

16. 16. The tray assembly (1) of claim 15, wherein the support member (1203) includes a plurality of support blocks (1203a), the plurality of support blocks (1203a) being spaced apart along the length of the load beam (1201), and each of the fastening members (13) being drilled into a corresponding one of the support blocks (1203a).

17. 16. The tray assembly (1) of claim 15, wherein the cross-sectional area of ​​the support member (1203) is s1 and the cross-sectional area of ​​the second loading cavity (1201c) is s2, 50%≦s1 / s2≦60%, and the cross-section of the support member (1203) and the cross-section of the second loading cavity (1201c) are both perpendicular to the length of the loading beam (1201).

18. The tray assembly (1) of claim 15, characterized in that an attachment through-hole (1201d) is formed in one side of the cavity wall of the second loading cavity (1201c) away from the first loading cavity (1201b), the support member (1203) is installed in the second loading cavity (1201c), one end of the support member (1203) abuts against the partition plate (1202), and the other end of the support member (1203) is fitted into the attachment through-hole (1201d) and fixedly connected to one side of the cavity wall of the second loading cavity (1201c) away from the partition plate (1202).

19. The tray assembly (1) of claim 15, characterized in that the frame (112) includes a bushing (1122) fixedly connected to the expansion beam (12) and the fastening member (13), respectively, and one end of the bushing (1122) adjacent to the expansion beam (12) abuts the support member (1203).

20. A power battery pack (100) comprising a battery (2), a sealing cover (3), and a tray assembly (1) according to any one of claims 1 to 19, The power battery pack (100) is characterized in that the sealing cover (3) covers the open side of the storage cavity (110) and defines an installation space (100a) together with the tray assembly (1), and the battery (2) is installed in the installation space (100a).

21. 21. The power battery pack (100) of claim 20, wherein the batteries (2) are multiple, the multiple batteries (2) are arranged in sequence along a first direction, and each battery (2) extends along a second direction; the expansion beams (12) are two, and the two expansion beams (12) are installed on both sides of the multiple batteries (2) in the first direction, and each expansion beam (12) extends along the second direction, and the second direction is perpendicular to the first direction.

22. A vehicle (200) comprising the power battery pack (100) of claim 20.

Images