Battery pack, frame assembly and vehicle

Abstract

The invention provides a battery pack, a frame assembly and a vehicle, and relates to the technical field of vehicles. The battery pack comprises a battery tray, a battery cell group and a battery pack cover, the battery tray comprises a bearing plate, two edge beams and at least two first limiting beams, the two edge beams are connected with the two opposite sides of the bearing plate respectively, the first limiting beams are correspondingly arranged on the side, close to the edge beams, of the bearing plate, and the edge beams are provided with first connecting surfaces; the first connecting surface is used for being hermetically connected with a frame beam; the battery cell group is arranged between the two oppositely arranged first limiting beams; and the battery pack cover covers the battery cell group and is connected with the first connecting surface in a sealing manner. According to the battery pack provided by the invention, the first limiting beams can be set to be small in thickness, so that the distance between the two opposite first limiting beams can be increased, and the total capacity of the battery cell group is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a battery pack, a frame assembly, and a vehicle. Background Art

[0002] With the continuous development of new energy vehicles, vehicle technology is also moving towards integration. The CTC (Computer-to-Cell) highly integrated structure is a product of this era. By integrating the battery pack directly into the vehicle frame, the CTC structure achieves battery layout space, improves vehicle performance, and reduces vehicle costs.

[0003] In the prior art, a battery pack consists of a cell pack, a base plate, and four expansion beams. The bottom surface of each expansion beam is connected to the base plate, and the expansion beams and the base plate together define a receiving slot, in which the cell pack is located. The vehicle frame includes a cover plate and two frame beams. The cover plate connects the two frame beams, covers the receiving slot, and is screwed to the top surface of the expansion beam.

[0004] However, the expansion beam needs to have a relatively large thickness, resulting in a smaller accommodation space in the mounting slot, and further resulting in a smaller total capacity of the battery cell group in the mounting slot. Summary of the Invention

[0005] The present application provides a battery pack, a frame assembly and a vehicle, which are used to solve the problem in the prior art that the thickness of the expansion beam is relatively large, resulting in a relatively small total capacity of the battery cell group.

[0006] In a first aspect, the present application provides a battery pack comprising:

[0007] A battery tray includes a load-bearing plate, two side beams, and at least two first limiting beams, wherein the two side beams are respectively connected to opposite sides of the load-bearing plate, the first limiting beams are correspondingly arranged on a side of the load-bearing plate close to the side beams, and the side beams have a first connecting surface for sealingly connecting to the frame rails;

[0008] A battery cell group is arranged between two oppositely arranged first limiting beams;

[0009] A battery pack cover is provided on the battery cell group and is sealed to the first connection surface.

[0010] In some possible embodiments, the first connecting surface has a plurality of first connecting portions and a plurality of second connecting portions, the first connecting portion is used to connect to the battery pack cover, the second connecting portion is used to connect to the frame beam, and the first connecting portion is located between the first limiting beam and the second connecting portion.

[0011] In some possible implementations, a first seal is further included, where the first seal is located between the first connecting portion and the first limiting beam, and the first seal abuts between the battery pack cover and the first connecting surface.

[0012] In some possible implementations, the first connecting surface has a groove, and the groove is used to accommodate at least a portion of the first sealing member.

[0013] In some possible embodiments, the battery pack cover includes a cover body and a flange arranged on the periphery of the cover body, the flange is located on the outside of the cover body, the cover body is arranged on the battery cell group, and the flange is used to seal and connect with the first connecting surface.

[0014] In some possible implementations, the battery tray further includes a first mounting portion and a second mounting portion, wherein the first mounting portion and the second mounting portion are located between the two side beams and connected to the two side beams;

[0015] The first mounting portion and the second mounting portion have a second connecting surface, and the second connecting surface is used for sealing connection with the battery pack cover and the frame rail.

[0016] In some possible implementations, the first mounting portion is die-cast, and / or the second mounting portion is die-cast.

[0017] In some possible implementations, a weight-reducing portion is provided on at least one of a surface of the side beam facing away from the first connecting surface, a surface of the first mounting portion facing away from the second connecting surface, and a surface of the second mounting portion facing away from the second connecting surface.

[0018] In some possible implementations, a central area of ​​the first mounting portion has a first protrusion, and the battery pack cover has a first recess matching the first protrusion;

[0019] And / or, the second mounting portion has a second protrusion, and the battery pack cover has a second recess matching the second protrusion.

[0020] In some possible implementations, the first position-limiting beam is a solid beam, and a thickness of the first position-limiting beam is greater than or equal to 5 mm and less than or equal to 15 mm.

[0021] In some possible implementations, the battery tray further includes two second position-limiting beams, the second position-limiting beams being connected to the bearing plate, and opposite sides of the second position-limiting beams being correspondingly connected to the two first position-limiting beams;

[0022] The two second position-limiting beams and the two first position-limiting beams jointly define an accommodating groove, and the accommodating groove is used to accommodate the battery cell group.

[0023] In some possible implementations, at least two of the side beams, the first position-limiting beams, and the second position-limiting beams are integrally die-cast.

[0024] In some possible implementations, at least one of the first position-limiting beam and the second position-limiting beam has a support rib on a side facing away from the accommodating groove, and the support rib extends along a height direction of the first position-limiting beam.

[0025] In a second aspect, the present application provides a vehicle frame assembly, comprising a vehicle frame and any one of the battery packs described in the first aspect, wherein the vehicle frame is connected to the battery pack.

[0026] In some possible implementations, the vehicle frame includes a frame cover and two frame rails, the frame cover connects the two frame rails, and the frame cover is disposed on a battery pack cover of the battery pack;

[0027] The frame rail is sealed and connected to a first connection surface of the battery pack, and the frame cover is sealed and connected to a second connection surface of the battery pack.

[0028] In some possible implementations, a plurality of second sealing members are further included, wherein the second sealing members abut between the frame rail and the first connecting surface, and / or the second sealing members abut between the frame cover and the second connecting surface.

[0029] In a third aspect, the present application provides a vehicle comprising a vehicle body and any one of the frame assemblies according to the second aspect above connected to the vehicle body.

[0030] This application proposes a battery pack, frame assembly, and vehicle. The battery pack includes a battery pack cover to protect the battery cell pack, ensuring its stability and reliability. By providing a first connection surface on the side beam, the first connection surface is sealed to both the battery pack cover and the frame beam, eliminating the need for a connection surface on the top surface of the first limiting beam to connect with the battery pack cover and the frame beam. This reduces the thickness of the first limiting beams, thereby increasing the distance between the two first limiting beams and thereby increasing the total capacity of the battery cell packs that can be accommodated between the two first limiting beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the battery pack cover;

[0034] Figure 3 for Figure 1 Schematic diagram of the structure with the battery pack cover removed;

[0035] Figure 4 for Figure 1 Partial cross-sectional view of the battery pack;

[0036] Figure 5 for Figure 1 Schematic diagram of the structure of the battery tray Figure 1 ;

[0037] Figure 6 for Figure 5 A structural diagram from another perspective;

[0038] Figure 7 for Figure 5 A structural diagram from another perspective;

[0039] Figure 8 for Figure 1 Schematic diagram of the structure of the battery tray Figure 2 ;

[0040] Figure 9 for Figure 8 A structural diagram from another perspective;

[0041] Figure 10 for Figure 8 A schematic structural diagram of the battery tray without the first mounting portion;

[0042] Figure 11 A schematic structural diagram of a frame assembly provided in an embodiment of the present application;

[0043] Figure 12 for Figure 11 A structural diagram from another perspective;

[0044] Figure 13 for Figure 12 Schematic diagram of the structure of AA;

[0045] Figure 14 for Figure 13 A magnified schematic diagram of point B in the middle;

[0046] Figure 15 for Figure 11 Schematic diagram of the structure of the middle frame cover;

[0047] Figure 16 for Figure 15 A structural diagram from another perspective.

[0048] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0049] Description of reference numerals:

[0050] 100 - battery tray; 101 - support rib; 102 - weight reduction portion; 110 - load-bearing plate; 120 - side beam; 121 - first connecting surface; 122 - groove; 130 - first limiting beam; 140 - first mounting portion; 141 - second connecting surface; 150 - second mounting portion; 160 - second limiting beam; 170 - middle beam; 180 - mounting foot;

[0051] 200-battery cell group; 210-battery cell;

[0052] 300-battery pack cover; 310-cover body; 320-flange; 330-limiting plate;

[0053] 400-frame; 410-frame cover; 411-cover plate; 412-third mounting portion; 420-frame beam;

[0054] 500-first sealing member; 600-second sealing member;

[0055] 700-first fastener; 800-second fastener. DETAILED DESCRIPTION

[0056] The following exemplary embodiments are described in detail, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numbers in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0057] In the prior art, a battery pack includes a cell group, a base plate, and multiple expansion beams. Each expansion beam is connected to the base plate, and each expansion beam and the base plate together define a receiving slot. The cell group is located in the receiving slot and supported by the base plate. The frame includes a cover plate and two frame beams. The cover plate connects the two frame beams. The cover plate is arranged on the mounting slot and is connected to the side of the expansion beam away from the base plate by screws. That is, the top surface of the expansion beam is connected to the cover plate by screws to fix the battery pack to the frame. However, the top surface of the above-mentioned expansion beam needs to be connected to the cover plate. To ensure the connection strength between the expansion beam and the cover plate, the top surface of the expansion beam needs to have a larger width, that is, the expansion beam needs to have a larger thickness. The distance between the two frame beams in the frame is usually fixed, that is, the width of the cover plate in the setting direction of the two frame beams is fixed, and the distance between the two expansion beams in the setting direction of the two frame beams is fixed. The thicker the expansion beam, the smaller the accommodation space in the installation slot, resulting in a smaller volume of the battery cell group in the installation slot, a smaller total capacity of the battery cell group, and a shorter vehicle range.

[0058] Based on this, embodiments of the present application provide a battery pack that, by providing a battery pack cover, protects the battery cell pack, ensuring the stability and reliability of the battery cell pack. By providing a first connection surface on the side beam, the first connection surface is sealedly connected to both the battery pack cover and the frame rail, eliminating the need for providing a connection surface on the top surface of the first limiting beam to connect the battery pack cover and the frame rail. This reduces the thickness of the first limiting beams, thereby increasing the distance between the two first limiting beams and thereby increasing the total capacity of the battery cell pack between the two first limiting beams.

[0059] The embodiments of the present application are described below with reference to the accompanying drawings.

[0060] Reference Figures 1 to 10 The battery pack provided in the embodiment of the present application includes: a battery tray 100, a battery cell group 200 and a battery pack cover 300. The battery tray 100 includes a load plate 110, two side beams 120 and at least two first limiting beams 130. The two side beams 120 are respectively connected to the opposite sides of the load plate 110. The first limiting beam 130 is correspondingly arranged on the side of the load plate 110 close to the side beam 120. The side beam 120 has a first connecting surface 121, which is used to be sealed and connected to the frame beam 420.

[0061] The battery cell group 200 is disposed between two oppositely disposed first limiting beams 130 . The battery pack cover 300 is disposed on the battery cell group 200 and is sealed to the first connection surface 121 .

[0062] The two side beams 120 are arranged along the first direction, and the two first position-limiting beams 130 arranged opposite to each other are also arranged along the first direction. Figure 3 The direction indicated by X and Figure 5The direction indicated by X in the figure. The cell group 200 includes a plurality of cell groups 210 stacked in sequence along a first direction. The cell groups 210 at both ends of the cell group 200 in the first direction abut against the first limiting beams 130. The first limiting beams 130 provide constraints for the cell group 200, ensuring the stability and safety of the cell group 200.

[0063] The first limiting beam 130 is arranged on a side of the supporting plate 110 close to the side beam 120, so that the distance between the two first limiting beams 130 is larger, thereby increasing the number of battery cells 210 in the battery cell group 200 between the two first limiting beams 130, thereby increasing the total capacity of the battery cell group 200.

[0064] For example, the side beams 120 and the first position-limiting beams 130 can be welded to the load-bearing plate 110. There can be two first position-limiting beams 130, and the two first position-limiting beams 130 are connected to the two side beams 120 in a one-to-one correspondence to improve the strength of the battery tray 100. For example, the first position-limiting beams 130 can be integrally formed with the corresponding side beams 120. Furthermore, the side beams 120 can be integrally extruded with the corresponding first position-limiting beams 130, or the side beams 120 can be integrally die-cast with the corresponding first position-limiting beams 130.

[0065] The height of the first limiting beam 130 is greater than or equal to the height of the battery cell 210. The height of the first limiting beam 130 is the height of the first limiting beam 130 at Figure 3 The height of the orthographic projection in the direction indicated by Z in FIG. 2 is the height of the battery cell 210. Figure 3 The height of the orthographic projection in the direction indicated by Z. For example, the height of the first limiting beam 130 can be 50 mm to 200 mm. The height of the side beam 120 is much smaller than the height of the first limiting beam 130. As a result, the battery tray 100 can have a low side beam appearance, while the first limiting beam 130 can provide anti-torsion properties, thereby enabling the battery tray 100 to have high modal and high anti-torsion properties.

[0066] The side of the first limiting beam 130 facing the battery cell group 200 is perpendicular to the supporting plate 110, and the side of the first limiting beam 130 facing away from the battery cell group 200 can be parallel to the portion of the battery pack cover 300 close to the first limiting beam 130, and there is a gap between the first limiting beam 130 and the battery pack cover 300.

[0067] Specifically, the first connection surface 121 is parallel to the carrier plate 110 and is configured to connect to the bottom surface of the frame rail 420. The first position-limiting beam 130 is located inside the battery cover 300. An angle is formed between the first connection surface 121 and the first position-limiting beam 130 to accommodate a portion of the battery cover 300 and a portion of the frame rail 420.

[0068] For example, the battery pack cover 300 needs to have good insulation properties. The battery pack cover 300 can be a composite material. The composite material can be made of epoxy resin and glass fiber, or made of polyurethane and glass fiber.

[0069] The battery pack provided in the embodiment of the present application is provided with a battery pack cover 300 to protect the cell pack 200, thereby ensuring the stability and reliability of the cell pack 200. By providing a first connection surface 121 on the side beam 120, the first connection surface 121 is sealedly connected to both the battery pack cover 300 and the frame rail 420, eliminating the need to provide a connection surface on the top surface of the first limiting beam 130 to connect with the battery pack cover 300 and the frame rail 420. As a result, the thickness of the first limiting beam 130 can be reduced, thereby increasing the distance between the two first limiting beams 130, and increasing the volume of the cell pack 200 that can be accommodated between the two first limiting beams 130, thereby increasing the total capacity of the cell pack 200.

[0070] It should be noted that the total capacity of the battery cell group 200 refers to the amount of electricity that can be stored and released after the battery cell group 200 is fully charged.

[0071] In a specific implementation, the first connecting surface 121 has multiple first connecting parts and multiple second connecting parts. The first connecting part is used to connect to the battery pack cover 300, and the second connecting part is used to connect to the frame beam 420. The first connecting part is located between the first limiting beam 130 and the second connecting part.

[0072] The battery pack cover 300 is disposed between two frame rails 420 .

[0073] For example, the side beam 120 extends along the second direction, the first connecting surface 121 also extends along the second direction, the first connecting portions are sequentially spaced along the second direction, and the second connecting portions are sequentially spaced along the second direction. Figure 3 The direction indicated by Y and Figure 5 The direction shown in Y.

[0074] Specifically, the battery pack cover 300 has multiple third connection portions, with the first connection portion correspondingly connected to the third connection portions. Exemplarily, the battery pack also includes a first fastener 700. The first and third connection portions are both connection holes, and the first fastener 700 is connected to the first connection portion via the third connection portion. For example, the first fastener 700 may be a screw.

[0075] Reference Figure 4 In a specific implementation, the battery pack provided in the embodiment of the present application further includes a first seal 500 , which is located between the first connecting portion and the first limiting beam 130 , and the first seal 500 abuts between the battery pack cover 300 and the first connecting surface 121 .

[0076] Specifically, when assembling the battery pack, the first sealing member 500 is first placed between the battery cover 300 and the first connecting surface 121, and between the first connecting portion and the first limiting beam 130. The first fastener 700 is then connected to the third connecting portion via the first connecting portion to compress the first sealing member 500, thereby allowing the first sealing member 500 to seal the first connecting surface 121 with the battery cover 300. This results in a sealed connection between the first connecting surface 121 and the battery cover 300.

[0077] Reference Figure 4 In some embodiments, a groove 122 is formed on the first connecting surface 121 , and the groove 122 is used to accommodate at least a portion of the first sealing member 500 .

[0078] The groove 122 is located between the first connecting portion and the first limiting beam 130 .

[0079] Exemplarily, the groove 122 extends along the second direction, and the shape of the groove 122 matches the shape of at least a portion of the first sealing member 500. For example, the groove 122 on the first connecting surface 121 can be a rectangular groove.

[0080] Reference Figure 2 、 Figure 3 and Figure 4 In a specific implementation, the battery pack cover 300 includes a cover body 310 and a flange 320 arranged on the side of the cover body 310. The flange 320 is located on the outside of the cover body 310. The cover body 310 is covered on the battery cell group 200. The flange 320 is used to be sealed and connected to the first connecting surface 121.

[0081] The third connection portion is located on the flange 320 . Thus, the flange 320 is provided to facilitate connection between the battery pack cover 300 and the first connection surface 121 .

[0082] Specifically, a portion of the peripheral side of the battery pack cover 300 is folded toward a side away from the interior of the battery pack cover 300 to form a flange 320 .

[0083] Reference Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 In a specific implementation, the battery tray 100 also includes a first mounting portion 140 and a second mounting portion 150. The first mounting portion 140 and the second mounting portion 150 are located between the two side beams 120 and are connected to the two side beams 120. The first mounting portion 140 and the second mounting portion 150 have a second connecting surface 141, which is used to seal and connect with the battery pack cover 300 and the frame beam 420.

[0084] The first mounting portion 140 and the second mounting portion 150 are spaced apart along the second direction. The two side beams 120 are respectively connected to the two sides of the load-bearing plate 110 in the first direction. The first mounting portion 140 and the second mounting portion 150 are respectively connected to the two sides of the load-bearing plate 110 in the second direction. Both ends of the first mounting portion 140 in the first direction and the second mounting portion 150 in the first direction are correspondingly connected to the side beams 120.

[0085] By providing a first mounting portion 140 and a second mounting portion 150, each of the first and second mounting portions 140 and 150 has a second connecting surface 141, which is used to sealably connect to the battery pack cover 300 and the frame cover 410. The first and second mounting portions 140 and 150 are connected between the two side beams 120, so that the first connecting surface 121 and the second connecting surface 141 form a continuous connecting surface. As a result, the battery pack cover 300 and the battery tray 100 are sealed together via the first and second connecting surfaces 121 and 141, and the battery cell pack 200 is located between the battery tray 100 and the battery pack cover 300. This allows the battery cell pack 200 to be enclosed in a sealed environment, protecting the battery cell pack 200 from the external environment and ensuring the stability of the battery cell pack 200.

[0086] Furthermore, the second connecting surface 141 has a first connecting portion and a second connecting portion. The first connecting portion is connected to the battery pack cover 300, and the second connecting portion is connected to the frame cover 410. The second connecting surface 141 has a groove 122. The groove 122 on the first connecting surface 121 and the groove 122 on the second connecting surface 141 are connected to form an annular groove. The first sealing member 500 is annular and is at least partially located within the annular groove. The first connecting portion is located outside the annular groove.

[0087] In a specific implementation, the first mounting portion 140 is formed by die-casting, and / or the second mounting portion 150 is formed by die-casting.

[0088] Among them, die casting has higher production efficiency and higher dimensional accuracy.

[0089] Reference Figure 8 and Figure 9 In some embodiments, a weight reduction portion 102 is provided on at least one of a side beam 120 facing away from the first connection surface 121 , a side of the first mounting portion 140 facing away from the second connection surface 141 , and a side of the second mounting portion 150 facing away from the second connection surface 141 .

[0090] In this way, by providing the weight-reducing portion 102 , the overall weight of the battery tray 100 is reduced, thereby lowering the manufacturing cost of the battery tray 100 .

[0091] Illustratively, the weight-reducing portion 102 is a weight-reducing groove.

[0092] In a specific implementation, the middle area of ​​the first mounting portion 140 has a first protrusion, and the battery pack cover 300 has a first recess that matches the first protrusion; and / or, the second mounting portion 150 has a second protrusion, and the battery pack cover 300 has a second recess that matches the second protrusion.

[0093] The first protrusion is located on the side of the first mounting portion 140 away from the side beam 120, and the second protrusion is located on the side of the second mounting portion 150 away from the side beam 120. Since the middle area of ​​the first mounting portion 140 in the first direction needs to be provided with a lug for mounting with the vehicle frame 400 and some components of the battery pack, the height of the middle area of ​​the first mounting portion 140 in the first direction is greater than the height of the two sides of the first mounting portion 140, that is, a first protrusion is formed on the first mounting portion 140. The height of the first mounting portion 140 refers to the height of the first mounting portion 140 in the first direction. Figure 5 The second mounting portion 150 also has a height in the direction indicated by Z. Figure 5 The protrusions extending in the direction indicated by Z are used to mount some components of the battery pack. Some components of the battery pack include the battery panel plug-in, water nozzle, explosion-proof valve, etc.

[0094] By providing the first recess and the second recess on the battery pack cover 300 , the battery pack cover 300 is sealed and connected to the first mounting portion 140 and the second mounting portion 150 , and the integrity of the battery pack is improved.

[0095] Specifically, the flange 320 corresponds to and matches the contours of the side beam 120 , the first mounting portion 140 , and the second mounting portion 150 , and the flange 320 abuts against the side beam 120 , the first mounting portion 140 , and the second mounting portion 150 .

[0096] Exemplarily, the heights of both sides of the first mounting portion 140 in the first direction are comparable to the height of the side beam 120 , and both sides of the first mounting portion 140 in the first direction are flush with the side beam 120 .

[0097] In some embodiments, the first position-limiting beam 130 is a solid beam, and the thickness of the first position-limiting beam 130 is greater than or equal to 5 mm and less than or equal to 15 mm.

[0098] When the first limiting beam 130 and the side beam 120 are integrally extruded, the first limiting beam 130 needs to be a solid structure due to limitations of the extrusion molding process. This can further reduce the thickness of the first limiting beam 130 in the first direction, thereby further increasing the distance between the two first limiting beams 130.

[0099] Reference Figure 5 、 Figure 6 、 Figure 8 and Figure 10In a specific implementation, the battery tray 100 further includes two second limiting beams 160 . The second limiting beams 160 are connected to the carrier plate 110 , and opposite sides of the second limiting beams 160 are correspondingly connected to the two first limiting beams 130 . The two second limiting beams 160 and the two first limiting beams 130 together define a receiving slot for accommodating the battery cell pack 200 .

[0100] The two second limiting beams 160 are spaced apart along the second direction, and the two second limiting beams 160 are parallel to each other. Figure 3 The direction indicated by Y and Figure 5 In the second direction, each battery cell 210 is located between two second limiting beams 160. By providing two second limiting beams 160, the battery cells 210 are limited in the second direction, and the strength of the battery tray 100 is improved.

[0101] Exemplarily, the second limiting beam 160 is welded to the bearing plate 110, the second limiting beam 160 extends along the first direction, and the two sides of the second limiting beam 160 in the first direction are correspondingly connected to the two first limiting beams 130. For example, the second limiting beam 160 can be welded to the first limiting beam 130 on both sides in the first direction.

[0102] In some embodiments, any at least two of each side beam 120 , each first position-limiting beam 130 , and each second position-limiting beam 160 are integrally die-cast.

[0103] In this way, the overall welding process of the battery tray 100 can be reduced, the welding defect rate of the battery tray can be reduced, the strength of the battery tray 100 can be improved, and the manufacturing cost of the battery tray 100 can be reduced.

[0104] For example, the side beam 120, the first limiting beam 130 and the second limiting beam 160 can be integrally die-cast. Figure 5 The direction shown by Z.

[0105] In some examples, the side beam 120 , the first position-limiting beam 130 , the second position-limiting beam 160 , and the second mounting portion 150 are integrally die-cast.

[0106] Reference Figure 8 and Figure 10 In some embodiments, at least one of the first position-limiting beam 130 and the second position-limiting beam 160 has a support rib 101 on a side away from the accommodating groove, and the support rib 101 extends along the height direction of the first position-limiting beam 130 .

[0107] The height direction of the first limiting beam 130 is Figure 3In the direction shown by Z, the actual working condition faced by the battery tray 100 in the height direction of the first limiting beam 130 is the most severe and is also the most likely to fail. By providing the support ribs 101, the battery tray 100 can be improved in the direction of Z. Figure 3 The anti-vibration strength and anti-torsion strength in the direction Z are shown in FIG. Specifically, the more the number of support ribs 101 is, the stronger the battery tray 100 is. Figure 3 The vibration and torsional strength in the direction shown by Z are higher.

[0108] It can be understood that after the support rib 101 is set, the thickness of the first limiting beam 130 in the first direction and the thickness of the second limiting beam 160 in the second direction can be further reduced while ensuring the strength of the first limiting beam 130 and the second limiting beam 160, so as to reduce the materials used in the first limiting beam 130 and the second limiting beam 160, and reduce the weight and manufacturing cost of the first limiting beam 130 and the second limiting beam 160.

[0109] Specifically, there are multiple support ribs 101 on the first limiting beam 130, and each support rib 101 is sequentially spaced apart along the second direction. There are also multiple support ribs 101 on the second limiting beam 160, and each support rib 101 is sequentially spaced apart along the first direction.

[0110] In some examples, the first position-limiting beam 130 and the supporting ribs 101 on the first position-limiting beam 130 may be integrally die-cast, and the second position-limiting beam 160 and the supporting ribs 101 on the second position-limiting beam 160 may be integrally die-cast.

[0111] In some embodiments, the battery tray 100 also includes at least one middle beam 170, which is arranged between the two second limiting beams 160 and connected to the supporting plate 110. The two sides of the middle beam 170 are correspondingly connected to the two first limiting beams 130. The middle beam 170 divides the accommodating groove into at least two sub-accommodating grooves, which are used to accommodate the battery cell group 200.

[0112] The second limiting beams 160 and the middle beam 170 are spaced apart along the second direction. The middle beam 170 is parallel to the second limiting beams 160 and perpendicular to the first limiting beams 130. The middle beam 170 is connected to the two first limiting beams 130 on opposite sides in the first direction.

[0113] For example, the middle beam 170 may be welded to the carrying plate 110 .

[0114] In some examples, the side beam 120 , the first position-limiting beam 130 , the second position-limiting beam 160 , and the middle beam 170 may be integrally die-cast.

[0115] In some embodiments, one of the second limiting beams 160 is close to the first mounting portion 140, the second limiting beam 160 is parallel to the first mounting portion 140, and the second limiting beam 160 and the first mounting portion 140 have a certain distance in the second direction, and the distance is used to accommodate the distribution box of the battery pack.

[0116] Furthermore, the battery pack includes at least one mounting leg 180, which is disposed between the second position-limiting beam 160 and the first mounting portion 140 near the first mounting portion 140. The mounting leg 180 is connected to a surface of the second position-limiting beam 160 facing the first mounting portion 140, and the mounting leg 180 is connected to the support plate 110. Exemplarily, there are at least two mounting legs 180, each spaced apart along the first direction. The mounting legs 180 can be integrally formed with the second position-limiting beam 160.

[0117] In some examples, the battery pack further includes at least one limiting plate 330, which is provided in a one-to-one correspondence with the battery cell group 200. The limiting plate 330 is located on the side of the battery cell group 200 away from the carrier plate 110 of the battery tray 100, and the two sides of the limiting plate 330 are connected to the two first limiting beams 130. The limiting plate 330 is used to control the battery cell group 200 in the battery tray 100. Figure 3 The battery cells 210 in the battery cell group 200 are limited in the direction indicated by Z to prevent them from falling out from between the two first limiting beams 130 .

[0118] Furthermore, the bottom surface of the cell group 200 abuts the carrier plate 110, and the limiting plate 330 is located above the top surface of the cell group 200. The limiting plate 330 has bent portions on both sides, which are connected to the first limiting beam 130. For example, the bent portions can be connected to the first limiting beam 130 using bolts and nuts, or they can be connected to the first limiting beam 130 using screws.

[0119] For example, the first limiting beam 130 has a notch on a side facing away from the battery cell group 200 that matches at least part of the bent portion, and at least part of the bent portion is located in the notch. A gap is provided between the limiting plate 330 and the battery pack cover 300.

[0120] In some embodiments, the carrier plate 110 includes a cold plate. The cold plate supports the battery cells 210 and can lower the temperature of the battery cells 210 , thereby reducing the possibility of thermal runaway of the battery cells 210 .

[0121] Exemplarily, the cold plate may be a water-cooled plate or an air-cooled plate.

[0122] Reference Figure 1 ,as well as Figures 11 to 16Based on the above embodiments, the embodiment of the present application further provides a frame assembly, including a frame 400 and any of the above battery packs, wherein the frame 400 is connected to the battery pack.

[0123] The specific structure of the battery pack has been described in detail in the above embodiments and will not be repeated here.

[0124] In the vehicle frame assembly provided in the embodiment of the present application, the battery pack is provided with a battery pack cover 300 to protect the battery cell group 200, thereby ensuring the stability and reliability of the battery cell group 200. By providing a first connection surface 121 on the side beam 120, the first connection surface 121 is simultaneously sealed with the battery pack cover 300 and the frame beam 420, eliminating the need to provide a connection surface on the top surface of the first limiting beam 130 to connect with the battery pack cover 300 and the frame beam 420. As a result, the thickness of the first limiting beam 130 can be reduced, thereby increasing the distance between the two first limiting beams 130, increasing the number of battery cells 210 in the battery cell group 200 between the two first limiting beams 130, and increasing the total capacity of the battery cell group 200.

[0125] Reference Figure 1 、 Figure 6 、 Figure 11 、 Figure 12 and Figure 13 In some embodiments, the vehicle frame 400 includes a frame cover 410 and two frame rails 420. The frame cover 410 connects the two frame rails 420 and is disposed on the battery pack cover 300 of the battery pack. The frame rails 420 are sealedly connected to the first connection surface 121 of the battery pack, and the frame cover 410 is sealedly connected to the second connection surface 141 of the battery pack.

[0126] The two frame rails 420 are positioned opposite each other, with the frame cover 410 disposed between them. The side rails 120 are positioned below the frame rails 420, with the bottom surface of the frame rails 420 sealed to the first connection surface 121. The frame cover 410 and frame rails 420 protect the battery pack, improving its stability and reliability.

[0127] Exemplarily, the frame assembly further includes a second fastener 800. The frame cover 410 and the frame rail 420 each have at least two first mounting holes spaced apart from each other. The side rail 120, the first mounting portion 140, and the second mounting portion 150 each have at least two second connecting portions spaced apart from each other. The second connecting portions are second mounting holes, and the first mounting holes and the second mounting holes are disposed in a one-to-one correspondence. The second fastener 800 is connected to the second mounting holes via the first mounting holes in a one-to-one correspondence. For example, the second fastener 800 is a screw or bolt.

[0128] In some examples, the frame cover 410 is a metal member to improve the torsional rigidity of the frame assembly and to help thermally isolate the battery pack. Thermal isolation refers to reducing the impact of thermal radiation on the battery pack, thereby protecting the battery pack from high temperature damage.

[0129] The frame cover 410 can be welded to the frame rail 420. For example, the frame cover 410 can be made of steel. For example, the frame cover 410 can be made of carbon steel.

[0130] Reference Figure 6 、 Figure 11 and Figure 14 In some embodiments, the frame assembly provided by the embodiments of the present application further includes a plurality of second seals 600 , wherein the second seals 600 abut between the frame rail 420 and the first connecting surface 121 , and / or the second seals 600 abut between the frame cover 410 and the second connecting surface 141 .

[0131] Thus, the space between the vehicle frame 400 and the battery pack cover 300 can be sealed by the second sealing member 600 .

[0132] For example, the second sealing member 600 may be sealing foam.

[0133] Specifically, the second sealing members 600 are disposed on opposite sides of the second connecting portion. Thus, when the second fastener is connected to the second mounting hole through the first mounting hole, the second sealing members 600 are compressed, thereby sealing the space between the vehicle frame 400 and the battery pack cover 300.

[0134] Reference Figure 6 、 Figure 15 and Figure 16 In a specific implementation, the frame cover 410 includes a cover plate 411 and two third mounting portions 412. The two third mounting portions 412 are respectively disposed on opposite sides of the cover plate 411. The sides of the third mounting portions 412 and the sides of the cover plate 411 are correspondingly connected to the two frame rails 420. The cover plate 411 is disposed on the battery pack cover 300, and the two third mounting portions 412 are correspondingly connected to the first mounting portion 140 and the second mounting portion 150.

[0135] The two frame rails 420 are arranged along a first direction, and the cover plate 411 is connected to the two frame rails 420 on both sides in the first direction. The third mounting portions 412 are respectively arranged on both sides of the cover plate 411 in the second direction. The third mounting portions 412 are perpendicular to the cover plate 411 and are connected to the two frame rails 420 on both sides in the first direction.

[0136] The third mounting portion 412 has a third recess, one of which mates with the first protrusion on the first mounting portion 140, and the other mates with the second protrusion on the second mounting portion 150. This facilitates connection between the third mounting portion 412 and the first and second mounting portions 140, 150, while also improving the integrity of the frame assembly.

[0137] In some examples, there is a gap between the cover plate 411 and the battery pack cover 300 to reduce the impact and vibration transmitted from the cover plate 411 to the battery pack cover 300 when the cover plate 411 is subjected to external impact, thereby protecting the battery pack to a certain extent.

[0138] Based on the above embodiments, an embodiment of the present application further provides a vehicle, comprising a vehicle body and a frame assembly connected to the vehicle body.

[0139] In the description and claims of the embodiments of the present application and the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the purposes of describing the embodiments of the present application. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0140] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to being constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood based on the specific circumstances.

[0141] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0142] Unless otherwise stated, the term "plurality" means two or more.

[0143] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the scope of this application is to be limited solely by the appended claims.

Claims

1. A battery pack, characterized in that: include: A battery tray (100) comprises a load-bearing plate (110), two side beams (120) and at least two first position-limiting beams (130), wherein the two side beams (120) are respectively connected to opposite sides of the load-bearing plate (110), the first position-limiting beams (130) are correspondingly arranged on a side of the load-bearing plate (110) close to the side beams (120), and the side beams (120) have a first connecting surface (121), and the first connecting surface (121) is used for sealing connection with the frame beam (420); A battery cell group (200) is arranged between two oppositely arranged first limiting beams (130); A battery pack cover (300) is provided on the battery cell group (200) and is sealed to the first connection surface (121).

2. The battery pack according to claim 1, wherein: The first connecting surface (121) has a plurality of first connecting portions and a plurality of second connecting portions, the first connecting portions being used to connect to the battery pack cover (300), the second connecting portions being used to connect to the vehicle frame beam (420), and the first connecting portions being located between the first limiting beam (130) and the second connecting portions.

3. The battery pack according to claim 2, wherein: The battery pack further comprises a first sealing member (500), the first sealing member (500) being located between the first connecting portion and the first limiting beam (130), and the first sealing member (500) being in contact with between the battery pack cover (300) and the first connecting surface (121).

4. The battery pack according to claim 3, wherein: The first connecting surface (121) has a groove (122), and the groove (122) is used to accommodate at least a portion of the first sealing component (500).

5. The battery pack according to claim 1, wherein: The battery pack cover (300) comprises a cover body (310) and a flange (320) arranged on the periphery of the cover body (310), wherein the flange (320) is located on the outside of the cover body (310), and the cover body (310) is covered on the battery cell group (200), and the flange (320) is used for sealing connection with the first connecting surface (121).

6. The battery pack according to claim 1, wherein: The battery tray (100) further comprises a first mounting portion (140) and a second mounting portion (150), wherein the first mounting portion (140) and the second mounting portion (150) are located between the two side beams (120) and connected to the two side beams (120); The first mounting portion (140) and the second mounting portion (150) are provided with a second connecting surface (141), and the second connecting surface (141) is used for sealingly connecting with the battery pack cover (300) and the vehicle frame beam (420).

7. The battery pack according to claim 6, characterized in that: The first mounting portion (140) is die-cast, and / or the second mounting portion (150) is die-cast.

8. The battery pack according to claim 6, wherein: A weight-reducing portion (102) is provided on at least one of a side of the side beam (120) facing away from the first connecting surface (121), a side of the first mounting portion (140) facing away from the second connecting surface (141), and a side of the second mounting portion (150) facing away from the second connecting surface (141).

9. The battery pack according to claim 6, wherein: The first mounting portion (140) has a first protrusion in a central area, and the battery pack cover (300) has a first recess matching the first protrusion; And / or, the second mounting portion (150) has a second protrusion, and the battery pack cover (300) has a second recess matching the second protrusion.

10. The battery pack according to any one of claims 1 to 9, characterized in that: The first position-limiting beam (130) is a solid beam, and the thickness of the first position-limiting beam (130) is greater than or equal to 5 mm and less than or equal to 15 mm.

11. The battery pack according to any one of claims 1 to 9, characterized in that: The battery tray (100) further comprises two second position-limiting beams (160), wherein the second position-limiting beams (160) are connected to the bearing plate (110), and opposite sides of the second position-limiting beams (160) are correspondingly connected to the two first position-limiting beams (130); The two second position-limiting beams (160) and the two first position-limiting beams (130) jointly define an accommodation groove, and the accommodation groove is used to accommodate the battery cell group (200).

12. The battery pack according to claim 11, wherein: Any at least two of the side beams (120), the first position-limiting beams (130), and the second position-limiting beams (160) are integrally die-cast.

13. The battery pack according to claim 11, wherein: At least one of the first position-limiting beam (130) and the second position-limiting beam (160) has a support rib (101) on a side facing away from the accommodating groove, and the support rib (101) extends along a height direction of the first position-limiting beam (130).

14. A frame assembly, characterized in that: The vehicle comprises a frame (400) and a battery pack according to any one of claims 1 to 13, wherein the frame (400) is connected to the battery pack.

15. The frame assembly according to claim 14, wherein: The vehicle frame (400) comprises a frame cover (410) and two frame beams (420), the frame cover (410) connects the two frame beams (420), and the frame cover (410) is arranged on the battery pack cover (300) of the battery pack; The frame beam (420) is correspondingly sealed and connected to the first connection surface (121) of the battery pack, and the frame cover (410) is correspondingly sealed and connected to the second connection surface (141) of the battery pack.

16. The frame assembly according to claim 15, wherein: The vehicle further comprises a plurality of second sealing members (600), wherein the second sealing members (600) abut between the frame rail (420) and the first connecting surface (121), and / or the second sealing members (600) abut between the frame cover (410) and the second connecting surface (141).

17. A vehicle, characterized in that: The vehicle frame assembly comprises a vehicle body and the frame assembly according to any one of claims 14 to 16 connected to the vehicle body.

Images