Connecting structure, battery pack and vehicle

Abstract

The utility model relates to a connecting structure, a battery pack and a vehicle. The connecting structure is used for connecting a vehicle body and a battery pack and comprises a first connecting piece, a second connecting piece and a third connecting piece, the first connecting piece is used for connecting the battery pack, the third connecting piece is used for connecting the vehicle body, the first connecting piece is in threaded connection with the second connecting piece, and the first connecting piece is in threaded connection with the third connecting piece. The second connecting piece is located between the vehicle body and the battery pack. According to the connecting structure, the second connecting piece is in threaded connection with the first connecting piece, the second connecting piece is located between the battery pack and the vehicle body, the relative position between the battery pack and the vehicle body cross beam is limited through the second connecting piece, the connecting strength between the battery pack and the vehicle body is improved, and the connecting stability of the connecting structure is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a connection structure, a battery pack including the connection structure, and a vehicle including the battery pack. Background Art

[0002] Since the vehicle will vibrate during use, in order to prevent the vibration from affecting the relative position of the battery pack in the vehicle body, a connector is usually provided on the side panel of the battery pack to fix the battery pack to the vehicle body.

[0003] However, as the size of the battery pack increases, it is difficult to ensure the connection strength of the battery pack using only the connectors provided on the side panels of the battery pack. When the vehicle is subjected to a large external impact, the connector may break under the external impact, thereby affecting the connection strength and stability between the battery pack and the vehicle body. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present application is to provide a connection structure with improved connection strength and connection stability, a battery pack including the connection structure, and a vehicle including the battery pack. Specifically, the technical solutions include the following:

[0005] In the first aspect, the embodiment of the present application provides a connection structure for connecting a vehicle body and a battery pack, including: a first connection member, a second connection member and a third connection member, the first connection member is used to connect the battery pack, the third connection member is used to connect the vehicle body, the first connection member and the second connection member are threadedly connected, the first connection member and the third connection member are threadedly connected, and the second connection member is located between the vehicle body and the battery pack. The battery pack of the present application realizes the connection between the battery pack and the vehicle body through the first connection member and the third connection member respectively, and realizes the connection between the vehicle body and the battery pack through the threaded connection between the first connection member and the third connection member.

[0006] The battery pack of the present application is further connected to the first connecting member through a second connecting member that is threadedly connected to the first connecting member, and the second connecting member is located between the vehicle body and the battery pack, so that the second connecting member can be used to limit the relative position between the battery pack and the vehicle body, and to improve the connection strength between the battery pack and the vehicle body, thereby improving the connection stability of the connection structure of the present application.

[0007] In one embodiment, the first connecting member is provided with an external thread, the second connecting member is provided with an internal thread, and the second connecting member is sleeved on the outer edge of the first connecting member and is threadedly connected to the first connecting member.

[0008] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the thread engagement height between the external thread of the first connecting member and the internal thread of the second connecting member is greater than or equal to 8 mm.

[0009] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the second connecting member includes a first section and a second section that are connected, the first section and the second section are both annular, and the end surface of the first section facing away from the second section is used to support the battery pack, and / or, the end surface of the second section facing away from the first section is used to support the vehicle body.

[0010] In one embodiment, the diameter of the inner circumference of the first section is equal to the diameter of the inner circumference of the second section, and along the arrangement direction of the battery pack and the vehicle body, the internal thread of the second connecting member is at least provided on the inner circumference of the first section.

[0011] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the projection of the second section on the first section is contained within the first section.

[0012] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the first connecting member includes a third section and a fourth section connected to each other, the third section is used to be fixedly connected to the battery pack, the fourth section is used to cooperate with the third connecting member to be fixedly connected to the vehicle body, and the external thread of the first connecting member is arranged on the outer peripheral surface of the fourth section.

[0013] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the projection of the fourth segment on the third segment is contained within the third segment.

[0014] In one embodiment, the first connecting member is provided with an internal thread, the third connecting member is provided with an external thread, the third connecting member extends into the first connecting member and is threadedly connected to the first connecting member; along the arrangement direction of the battery pack and the vehicle body, the surface of the fourth section facing away from the third section is provided with an inner hole, the inner hole passes through the fourth section and extends into the third section, and the internal thread of the first connecting member is provided on at least a portion of the hole wall of the inner hole.

[0015] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the third connecting member includes a connected screw and an end head, the projection of the screw on the end head is accommodated on the end head, and the external thread of the third connecting member is arranged on the screw; the screw is used to pass through the body cross beam of the vehicle body and extend into the inner hole to be threadedly connected with the first connecting member, and the end head is used to support the body cross beam as the screw is extended, so as to realize the fixed connection between the first connecting member and the body cross beam.

[0016] In one embodiment, the fourth section is annular, and the difference between the outer diameter of the fourth section and the outer diameter of the thread of the internal thread of the first connecting member is greater than or equal to 8 mm.

[0017] In a second aspect, an embodiment of the present application provides a battery pack, including a battery tray and a connecting structure, wherein a first connecting member of the connecting structure is connected to the battery tray.

[0018] In one embodiment, the battery tray includes a bottom plate, side beams, and spacer beams, wherein the side beams and the spacer beams are fixed to the surface of the bottom plate facing the vehicle body; the side beams are arranged around the periphery of the bottom plate and surround the spacer beams, and along the length direction of the spacer beams, the opposite ends of the spacer beams are fixedly connected to the side beams, and the first connecting member is fixedly connected to the side beams or the spacer beams.

[0019] In one embodiment, the first connecting member is embedded in the spacer beam or the side beam from the end surface of the spacer beam or the side beam toward the vehicle body and is fixed in the spacer beam or the side beam.

[0020] In one embodiment, along the arrangement direction of the battery pack and the vehicle body, the depth of the first connecting member embedded in the spacer beam or the side beam is greater than or equal to 45 mm.

[0021] In one embodiment, the battery pack also includes a shell and a battery pack, the shell seals a battery tray, the battery tray accommodates the battery pack, and along the arrangement direction of the battery pack and the vehicle body, the end of the first connecting member away from the battery tray passes through the shell and is used to cooperate with the third connecting member to be fixedly connected to the vehicle body.

[0022] In a third aspect, an embodiment of the present application provides a vehicle, including a vehicle body and a battery pack, wherein the vehicle body is provided with a vehicle body cross beam, and a connecting part of the battery pack is fixedly connected to the vehicle body cross beam.

[0023] It can be understood that the battery pack provided in the second aspect of the present application and the vehicle provided in the third aspect have the effect of improving the connection strength and connection stability because they adopt the battery pack provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the exploded structure of a vehicle provided in one embodiment of the present application;

[0026] Figure 3 A schematic diagram of the exploded structure of a battery pack provided in one embodiment of the present application;

[0027] Figure 4 A schematic diagram of a partial structure of a battery pack provided in one embodiment of the present application;

[0028] Figure 5 A partially enlarged structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0029] Figure 6 Another partially enlarged structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0030] Figure 7This is a schematic diagram of the decomposed structure of a connection structure provided in one embodiment of the present application;

[0031] Figure 8 Another schematic diagram of the decomposed structure of the connection structure provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0033] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] See also Figure 1 The structural diagram of a vehicle 300 provided in one embodiment of the present application is shown, and please refer to Figure 2 A schematic diagram of the exploded structure of a vehicle 300 provided in one embodiment of the present application is shown.

[0037] like Figure 1 and Figure 2 As shown, the vehicle 300 provided in the present application includes a body 301 and a battery pack 200. The body 301 is provided with a body cross beam 3011. Exemplarily, the body cross beam 3011 can be a seat cross beam of the vehicle 300. The battery pack 200 is fixed to the body cross beam 3011 through a connecting structure 100. The battery pack 200 is used to provide electrical energy for the vehicle 300 of the present application. When the vehicle 300 is turned on, the chemical energy inside the battery pack 200 will be converted into electrical energy and transmitted to the power supply equipment of the vehicle 300 to realize the corresponding functions of the corresponding power supply equipment.

[0038] In this embodiment, the vehicle 300 of the present application further includes a sealing plate 302, which is held between the body cross beam 3011 and the battery pack 200 along the arrangement direction of the body cross beam 3011 and the battery pack 200. The sealing plate 302 is used to shield the gap (not shown in the figure) exposed on the surface of the battery pack 200 facing the body cross beam 3011 to prevent external impurities from entering the interior of the body 301 through the gap, thereby ensuring the sealing of the passenger compartment in the vehicle.

[0039] See also Figure 3 The exploded structural diagram of the battery pack 200 provided in one embodiment of the present application is shown in FIG. Figure 4 A schematic diagram of the partial structure of a battery pack 200 provided in one embodiment of the present application is shown.

[0040] like Figure 3 and Figure 4As shown, the battery pack 200 of the present application includes a shell 201, a battery tray 202, a battery pack (not shown in the figure) and a connecting structure 100. The shell 201 is used to seal the battery tray 202. The battery tray 202 is used to accommodate the battery pack, and the connecting structure 100 is used to connect the battery tray 202 to the vehicle body 301. In one embodiment, the connecting structure 100 is used to connect the battery tray 202 to the vehicle body cross beam 3011 of the vehicle body 301. In other embodiments, the connecting structure 100 is used to connect other structures of the vehicle body 301, and the present application does not impose any particular restrictions on this.

[0041] The battery tray 202 includes a bottom plate 2021, a side beam 2022, and a spacer beam 2023. The side beam 2022 and the spacer beam 2023 are fixed to the same side surface of the bottom plate 2021. The side beam 2022 is arranged around the periphery of the bottom plate 2021 and surrounds the spacer beam 2023. Along the length direction of the spacer beam 2023, the opposite ends of the spacer beam 2023 are fixedly connected to the side beam 2022.

[0042] For ease of description, in the embodiment of the present application, the planar direction of the bottom plate 2021 of the battery tray 202 is set to a first direction 001 and a second direction 002 that are perpendicular to each other, and the planar direction perpendicular to the bottom plate 2021 is set to a third direction 003 .

[0043] like Figure 3 and Figure 4 As shown, there are three spacing beams 2023, one of which has a length direction in the first direction 001, and the other two spacing beams 2023 have a length direction in the second direction 002, and are arranged at intervals along the first direction 001. The first direction 001 and the second direction 002 are perpendicular to each other.

[0044] Among them, three spacing beams 2023 are arranged in a staggered manner to divide the space formed by the bottom plate 2021 and the side beams 2022 into a plurality of accommodating cavities 2024, each of which is used to accommodate at least one battery pack. The battery packs in each accommodating cavity 2024 are connected in parallel or in series to make the battery pack 200 of the present application have a certain voltage and capacity, so as to meet the actual use requirements of the vehicle 300 of the present application.

[0045] In this embodiment, the housing 201 includes a cover plate 2011 and a cold plate 2012. The cover plate 2011 is fixed to one end of the side beam 2022 away from the bottom plate 2021 and covers the exposed outer surface of the bottom plate 2021 to seal the battery tray 202, thereby preventing external impurities from entering the battery tray 202 and affecting the safety of the battery pack. The safety of the battery pack 200 of this application is ensured.

[0046] The cold plate 2012 covers the battery pack contained in the battery tray 202, and the interior of the cold plate 2012 is connected to an external heat exchange medium source to absorb the heat released by the battery pack during operation to ensure the normal operating temperature of the battery pack, thereby improving the service life of the battery pack 200 of the present application.

[0047] In the embodiment of the present application, the cold plate 2012 is integrated on the cover plate 2011 to reduce the internal space of the battery pack 200 occupied by the cold plate 2012 and reduce the space size of the battery pack 200 of the present application, so that the battery pack 200 of the present application has a compact structure.

[0048] See also Figure 5 The schematic diagram of a partially enlarged structure of a vehicle 300 provided in one embodiment of the present application is shown, and Figure 6 Another partially enlarged structural diagram of a vehicle 300 provided in one embodiment of the present application is shown in FIG. Figure 1-Figure 4 .

[0049] like Figure 1-Figure 6 As shown, the connection structure 100 of the present application includes a first connection member 10, a second connection member 20 and a third connection member 30. The first connection member 10 is used to connect the battery tray 202 of the battery pack 200, and the third connection member 30 is used to connect the body cross beam 3011 of the body 301. The first connection member 10 is threadedly connected to the third connection member 30, so as to realize the connection structure 100 of the present application to connect the battery tray 202 and the body cross beam 3011.

[0050] The second connector 20 is threadedly connected to the first connector 10. Along the third direction 003, the second connector 20 is located between the vehicle body 301 and the battery pack 200. It can be understood that the arrangement of the second connector 20 defines the relative position of the vehicle body 301 and the battery pack 200 along the third direction 003, and improves the connection strength between the battery pack 200 and the vehicle body 301, and improves the connection stability of the connection structure 100 of the present application.

[0051] Specifically, Figure 1-Figure 6 As shown, along the third direction 003, one end of the first connecting member 10 is fixedly connected to the battery tray 202, and the other end passes through the cover plate 2011 of the shell 201 and is fixedly connected to the body cross beam 3011, thereby realizing the fixed connection between the battery pack 200 of the present application and the body cross beam 3011.

[0052] In one embodiment, the first connecting member 10 is provided with an external thread, and the second connecting member 20 is provided with an internal thread. Along the third direction 003, the second connecting member 20 is located between the cover plate 2011 and the body cross beam 3011. The second connecting member 20 is sleeved on the outer edge of the first connecting member 10 and is threadedly connected to the external thread of the first connecting member 10.

[0053] It can be understood that the first connection member 10 has a smaller cross-sectional size than the second connection member 20. That is, the provision of the second connection member 20 can increase the connection cross-sectional area between the battery pack 200 and the vehicle body cross beam 3011. When an external impact acts on the connection structure 100, the external impact can be dispersed to the second connection member 20 while acting on the first connection member 10, thereby reducing the risk of the first connection member 10 breaking, improving the connection strength of the connection structure 100 between the battery pack 200 and the vehicle body cross beam 3011, and improving the connection stability of the connection structure 100 of the present application.

[0054] On the other hand, the battery pack 200 of the present application can adjust the height of the second connecting member 20 in the third direction 003 so that the connecting structure 100 of the present application can be matched and set according to the installation space inside the vehicle 300, thereby reducing the vehicle space of the vehicle 300 occupied by the connecting structure 100 between the battery pack 200 and the vehicle body cross beam 3011 and improving assembly efficiency.

[0055] For ease of description, in the embodiment of the present application and subsequent embodiments, one end of the first connecting member 10 is fixedly connected to the vehicle body cross beam 3011, and the other end passes through the cover plate 2011 along the third direction 003 and is fixedly connected to the battery tray 202. However, in actual situations, the other end of the first connecting member 10 can also pass through the remaining structure of the shell 201 (not shown in the figure) along the second direction 002 or the first direction 001 to be fixedly connected to the side beam 2022 or the bottom plate 2021 of the battery tray 202. Alternatively, the third direction 003 passes through the remaining structure of the shell 201 (not shown in the figure) to be fixedly connected to the surface of the bottom plate 2021 of the battery tray 202 away from the side beam 2022. The present application does not impose any particular restrictions on this.

[0056] Please see Figure 7 The schematic diagram of the exploded structure of the connection structure 100 provided in one embodiment of the present application is shown in FIG. Figure 8 Another exploded structural diagram of a connection structure provided in one embodiment of the present application is shown. Figure 7 for Figure 5 Schematic diagram of the decomposition structure, Figure 8 for Figure 6 Schematic diagram of the decomposition structure.

[0057] like Figure 5-Figure 8 As shown, the outer circumference of the first connecting member 10 is provided with an external thread, and the inner circumference of the second connecting member 20 is provided with an internal thread. The external thread of the first connecting member 10 and the internal thread of the second connecting member 20 cooperate with each other to realize the threaded connection between the first connecting member 10 and the second connecting member 20.

[0058] Wherein, along the third direction 003, the meshing height of the threads between the external thread of the first connecting member 10 and the internal thread of the second connecting member 20 is greater than or equal to 8 mm.

[0059] It is understandable that when the meshing height of the threads between the external thread of the first connector 10 and the internal thread of the second connector 20 is less than 8 mm, the threads that mesh with each other between the first connector 10 and the second connector 20 are relatively few, and when the second connector 20 is installed on the first connector 10, it may cause the second connector 20 and the first connector 10 to have a thread slipping phenomenon. When an external impact is transmitted to the first connector 10, it is difficult for the first connector 10 to transmit the external impact to the second connector 20, thereby causing the first connector 10 to break.

[0060] That is, the meshing height of the threads between the external thread of the first connector 10 and the internal thread of the second connector 20 is greater than or equal to 8 mm, which can ensure the connection stability between the second connector 20 and the first connector 10, and ensure the effect of the second connector 20 on improving the connection strength between the battery pack 200 and the vehicle body cross beam 3011. Thus, the connection stability of the battery pack 200 of the present application is ensured.

[0061] In one embodiment, if Figure 5-Figure 8 As shown, along the third direction 003, the second connecting member 20 includes a first section 21 and a second section 22 connected to each other, the first section 21 and the second section 22 are both annular, the end surface of the first section 21 facing away from the second section 22 abuts against the cover plate 2011 of the shell 201, and the end surface of the second section 22 facing away from the first section 21 abuts against the body cross beam 3011.

[0062] It can be understood that, along the third direction 003, the first section 21 of the second connector 20 abuts against the cover plate 2011 of the housing 201, and the second section 22 of the second connector 20 abuts against the vehicle body cross beam 3011, so as to define the relative position between the battery pack 200 of the present application and the vehicle body cross beam 3011. In other embodiments, the second connector 20 may have only the first section 21 abut against the cover plate 2011, or only the second section 22 abut against the vehicle body cross beam 3011.

[0063] Since the first connector 10 needs to pass through the cover plate 2011 and be fixedly connected to the battery tray 202, it can be understood that the first section 21 of the second connector 20 is abutted against the cover plate 2011, and the second connector 20 is threadedly connected to the first connector 10, so that the second connector 20 can cooperate with the first connector 10 to shield the through hole (not shown in the figure) provided on the cover plate 2011 for passing the first connector 10, thereby reducing the possibility of external impurities entering the battery pack 200.

[0064] In one embodiment, the diameter of the inner circumference of the first section 21 is equal to the diameter of the inner circumference of the second section 22 , and along the arrangement direction of the battery pack 200 and the vehicle body 301 , the internal thread of the second connecting member 20 is at least provided on the inner circumference of the first section 21 .

[0065] For example, Figure 5 and Figure 7 As shown, along the third direction 003, one end of the first connector 10 passes through the cover plate 2011 of the housing 201 and is fixedly connected to the battery tray 202, and the other end is fixedly connected to the vehicle body cross beam 3011. The internal thread of the second connector 20 is provided on the inner circumference of the first section 21 and the inner circumference of the second section 22.

[0066] like Figure 6 and Figure 8 As shown, along the third direction 003, one end of the first connector 10 passes through the cover plate 2011 of the housing 201 and is fixedly connected to the battery tray 202, and the other end passes through the sealing plate 302 and is fixedly connected to the vehicle body cross beam 3011. Thus, the battery pack 200 of the present application is fixedly connected to the vehicle body cross beam 3011. The internal thread of the second connector 20 is arranged on the inner circumference of the first section 21. The second section 22 is used to pass through the sealing plate 302 and abut against the vehicle body cross beam 3011.

[0067] In one embodiment, if Figure 6 and Figure 8 As shown, along the third direction 003, the projection of the second section 22 on the first section 21 is contained in the first section 21. That is, the cross-sectional area of ​​the second section 22 is smaller than the cross-sectional area of ​​the first section 21. Since the second section 22 needs to pass through the sealing plate 302 and abut against the vehicle body cross beam 3011. It can be understood that the second section 22 with a smaller cross-sectional area can reduce the aperture of the hole opened on the sealing plate 302, thereby reducing the influence of the hole on the sealing plate 302 on the sealing performance of the sealing plate 302.

[0068] On the other hand, since the external impact may directly act on the battery pack 200 during the actual operation of the vehicle 300, the partial structure of the first connector 10 close to the battery pack 200 may be subjected to a greater impact force. It can be understood that the first section 21 with a larger cross-sectional size can improve the connection strength between the battery pack 200 and the vehicle body cross beam 301 relatively close to the battery pack 200, thereby further improving the connection stability of the battery pack 200 of the present application.

[0069] At the same time, since the second connector 20 also has the function of shielding the through hole on the cover plate 2011 for passing the first connector 10, it can be understood that the first section 21 with a larger cross-sectional size can also improve the shielding of the through hole by the second connector 20, thereby improving the sealing of the battery pack 200 of the present application.

[0070] For example, in order to avoid the small cross-sectional size of the first section 21 affecting the shielding function of the through hole, under the premise that the diameter of the first connecting member 10 threadedly connected to the first section 21 is designed to be 18 mm in the present application, the diameter of the inscribed circle of the outer contour of the first section 21 is greater than or equal to 39 mm.

[0071] In one embodiment, the outer contour of the first section 21 can be set to be circular or polygonal.

[0072] In one embodiment, the first connecting member 10 is used to be fixedly connected to the spacing beam 2023 .

[0073] Specifically, Figure 5-Figure 8 As shown, along the third direction 003, the first connector 10 includes a third section 11 and a fourth section 12 connected to each other, and the third section 11 is closer to the bottom plate 2021 than the fourth section 12. The third section 11 is used to be fixedly connected to the spacing beam 2023 of the battery tray 202, and the fourth section 12 is used to cooperate with the second connector 20 to be fixedly connected to the vehicle body 301. Thus, the battery pack 200 is fixedly connected to the vehicle body 301.

[0074] In this embodiment, the external thread of the first connecting member 10 is disposed on the outer circumference of the fourth section 12. That is, the second connecting member 20 is sleeved on the outer edge of the fourth section 12 and is threadedly connected with the external thread of the outer circumference of the fourth section 12.

[0075] In one embodiment, the third section 11 extends into the cover plate 2011 and is embedded and fixed in the spacer beam 2023 from the spacer beam 2023 toward the end surface of the vehicle body cross beam 3011 . The fourth section 12 is used to be fixed to the vehicle body cross beam 3011 together with the second connecting member 20 .

[0076] Compared with the solution of setting a connecting protrusion on the spacing beam 2023 in the prior art, the battery pack 200 of the present application embeds the third section 11 of the first connecting member 10 into the spacing beam 2023, thereby reducing the space occupied by the third section 11 inside the battery pack 200, thereby improving the internal space utilization of the battery pack 200 of the present application.

[0077] At the same time, embedding the third section 11 of the first connecting member 10 into the spacer beam 2023 can also improve the connection strength of the first connecting member 10, reduce the possibility of external impact acting on the third section 11 causing the third section 11 to separate from the battery tray 202, further improve the connection strength between the battery pack 200 of the present application and the vehicle body cross beam 3011, and further improve the connection stability of the battery pack 200 of the present application.

[0078] For ease of description, in the present embodiment and subsequent embodiments, the third section 11 of the first connecting member 10 is embedded in the spacer beam 2023. It is understandable that in other embodiments, the third section 11 of the first connecting member 10 can also be embedded in the side beam 2022. This application does not impose any particular limitation on this.

[0079] In one embodiment, the first connector 10 and the battery tray 202 are fixedly connected by welding. In another embodiment, the first connector 10 and the battery tray 202 can also be fixed by bolting. In other embodiments, the connection between the first connector 10 and the battery tray 202 can also be other, and the present application does not impose any particular limitation on this.

[0080] In one embodiment, the first connector 10 and the battery tray 202 are made of the same material. Exemplarily, the first connector 10 and the battery tray 202 are both made of aluminum or magnesium alloy, so that the first connector 10 has a relatively low mass, which is conducive to realizing a lightweight design of the battery pack 200.

[0081] It is understandable that setting the material of the first connector 10 to be the same as the material of the battery tray 202 can reduce the difficulty of welding between the first connector 10 and the battery tray 202, and at the same time improve the welding strength between the first connector 10 and the battery tray 202. This reduces the connection difficulty of the battery pack 200 of the present application and improves the connection strength of the battery pack 200 of the present application.

[0082] In one embodiment, along the third direction 003, the depth of the third section 11 embedded in the spacing beam 2023 is greater than or equal to 45 mm. It can be understood that the depth limit of the third section 11 embedded in the spacing beam 2023 can avoid affecting the connection effect between the third section 11 and the spacing beam 2023 due to the third section 11 being embedded too shallowly, thereby further improving the connection strength between the third section 11 and the spacing beam 2023, and ensuring the connection strength and connection stability of the battery pack 200 of the present application.

[0083] In one embodiment, the first connecting member 10 is provided with an internal thread, the third connecting member 30 is provided with an external thread, and the third connecting member 30 extends into the first connecting member 10 and is threadedly connected to the first connecting member 10 .

[0084] Specifically, Figure 5-Figure 8 As shown, the end surface of the fourth section 12 facing away from the third section 11 is provided with an inner hole 13, and the inner hole 13 passes through the fourth section 12 along the third direction 003 and extends into the third section 11. The internal thread of the first connecting member 10 is provided on at least part of the hole wall of the inner hole 13, so as to facilitate the threaded connection between the first connecting member 10 and the third connecting member 30.

[0085] In one embodiment, along the third direction 003, the third connecting member 30 includes a connected screw rod 31 and an end head 32. The projection of the screw rod 31 on the end head 32 is received on the end head 32, that is, the cross-sectional area of ​​the end head 32 is larger than the cross-sectional area of ​​the screw rod 31. The external thread of the third connecting member 30 is provided on the outer peripheral surface of the screw rod 31.

[0086] The screw rod 31 of the third connecting member 30 is used to pass through the cross beam 3011 and screw into the inner hole 13, and the end 32 of the third connecting member 30 is used to abut the cross beam 3011 as the screw rod 31 is screwed into the inner hole 13, so as to achieve a fixed connection between the fourth section 12 and the second connecting member 20. At this time, along the third direction 003, both sides of the cross beam 3011 are clamped by the end 32 and the second connecting member 20, so as to achieve a fixed connection of the cross beam 3011 to the connection structure 100 of the present application.

[0087] It can be understood that the inner hole 13 extends into the third section 11, so that when an external impact acts on the vehicle body 301, the impact force transmitted through the third connecting member 30 can also be transmitted to the third section 11, and then transmitted to the battery tray 202 by the third section 11. In this way, the influence of the external impact on the fourth section 12 of the first connecting member 10 is reduced, thereby ensuring the connection strength between the battery pack 200 and the vehicle body cross beam 3011. The connection stability of the battery pack 200 of the present application is improved.

[0088] In one embodiment, the fourth section 12 is annular, and the difference between the outer diameter of the fourth section 12 and the thread diameter of the hole wall of the inner hole 13 is greater than or equal to 8 mm. Since the fourth section 12 is provided with the inner hole 13, the provision of the inner hole 13 reduces the material thickness of the fourth section 12, so that the strength of the fourth section 12 is reduced.

[0089] It is understandable that controlling the size between the outer diameter of the fourth section 12 and the hole wall of the inner hole 13 can improve the structural strength of the fourth section 12 and avoid the situation where the fourth section 12 is broken due to external impact due to the fourth section 12 being too thin. This further improves the connection strength between the battery pack 200 of the present application and the vehicle body cross beam 3011. It also improves the connection stability of the battery pack 200 of the present application.

[0090] In one embodiment, along the third direction 003, the projection of the fourth section 12 on the third section 11 is contained within the third section 11. That is, the cross-sectional area of ​​the fourth section 12 is smaller than the cross-sectional area of ​​the third section 11. Since the fourth section 12 needs to pass through the cover plate 2011 and extend toward the vehicle body cross beam 3011. It can be understood that providing a fourth section 12 with a smaller cross-sectional area can reduce the aperture of the through hole (not shown in the figure) opened on the cover plate 2011, thereby reducing the influence of the through hole on the sealing performance of the battery pack 200.

[0091] On the other hand, during the actual operation of the vehicle 300, external impact may directly act on the battery pack 200, and at this time, the third section 11 of the first connector 10 will bear a large impact force. It can be understood that the third section 11 with a larger cross-sectional size can improve the connection strength between the battery pack 200 and the vehicle body cross beam 301 relatively close to the battery pack 200, thereby further improving the connection stability of the battery pack 200 of the present application.

[0092] Therefore, based on the limitations of the above-mentioned embodiments, it can be known that the connection structure 100 of the present application improves the connection strength between the third section 11 of the first connecting member 10 and the battery tray 202 by embedding the third section 11 of the first connecting member 10 into the spacer beam 2023 or the side beam 2022, reduces the space occupied by the first connecting member 10 in the battery tray 202, and improves the space utilization rate of the battery pack 200 of the present application.

[0093] At the same time, the distance between the outer diameter of the fourth section 12 of the first connecting member 10 and the hole wall of the inner hole 13 is controlled to ensure the connection strength of the fourth section 12. Thus, while the battery pack 200 and the vehicle body cross beam 3011 are fixedly connected through the battery tray 202, the connection strength of the connection structure 100 of the present application is ensured.

[0094] On the other hand, compared with the solution of setting the connection point on the side panel in the prior art, the setting of the first connecting member 10 of the connection structure 100 of the present application realizes the connection between the spacing beam 2023 of the battery tray 202 and the body cross beam 3011, and realizes the setting of the connection point between the battery pack 200 of the present application and the body 301 at the middle of the battery pack 200, thereby improving the connection strength of the connection structure 100 of the present application.

[0095] The connection structure 100 of the present application also sets a second connecting member 20 and controls the engagement height of the thread between the second connecting member 20 and the first connecting member 10, so that the second connecting member 20 can limit the relative position between the battery pack 200 and the vehicle body cross beam 3011 while allowing the second connecting member 20 to absorb a certain amount of external impact, thereby improving the connection strength of the connection structure 100 between the battery pack 200 and the vehicle body cross beam 3011.

[0096] When the connection structure 100 of the present application is used in conjunction with the battery pack 200 in the vehicle 300, the provision of the second connecting member 20 enables the present application to adjust the installation distance between the vehicle body 301 and the battery pack 200 according to the installation space between the vehicle body 301 and the battery pack 200, thereby simplifying the assembly process and improving assembly efficiency.

[0097] Due to the improved connection strength between the battery pack 200 and the vehicle body cross beam 3011, the safety strength of the vehicle 300 of the present application is also improved. When the vehicle 300 is subjected to external impact or collision, the safety performance of the vehicle 300 of the present application is improved. For example, when the battery pack 200 of the present application is applied to the vehicle 300, the intrusion amount of the battery pack 200 of the present application can be increased by 27%.

[0098] In one embodiment, if Figure 5-Figure 8 As shown, a first receiving groove 23 is provided on the end surface of the first section 21 of the second connecting member 20 away from the second section 22. The first receiving groove 23 is annular and surrounds the outer edge of the first connecting member 10. The axis of the first receiving groove 23 coincides with the axis of the first connecting member 10.

[0099] The battery pack 200 of the present application further includes a first sealing ring 40, which is disposed in the first receiving groove 23, and along the third direction 003, the opposite ends of the first sealing ring 40 are abutted between the groove bottom of the first receiving groove 23 and the cover plate 2011. The first sealing ring 40 is used to eliminate the gap between the first section 21 of the second connecting member 20 and the cover plate 2011, so as to prevent external impurities from entering the battery pack 200 through the gap between the first section 21 and the cover plate 2011, thereby improving the sealing performance of the battery pack 200 of the present application.

[0100] In one embodiment, the internal thread of the second connecting member 20 is provided with sufficient connection strength with the first connecting member 10. Figure 6 and Figure 8 As shown, at least part of the inner circumference of the second section 22 is not provided with internal threads. The inner circumference of the second section 22 of the second connecting member 20 that is not provided with internal threads is provided with a second receiving groove 24, which surrounds the inner circumference of the second section 22 around the axis of the first connecting member 10.

[0101] The battery pack 200 of the present application further includes a second sealing ring 50, which is disposed in the second receiving groove 24, and along the first direction 001 and the second direction 002, the opposite ends of the second sealing ring 50 are held between the bottom of the second receiving groove 24 and the first connector 10. The second sealing ring 50 is used to eliminate the gap between the second section 22 of the second connector 20 and the first connector 10, so as to prevent external impurities from entering the battery pack 200 through the gap between the second section 22 and the first connector 10, thereby improving the sealing performance of the battery pack 200 of the present application.

[0102] In one embodiment, if Figure 5-Figure 8As shown, the battery pack 200 of the present application further includes a wire screw sleeve 60, which is sleeved on the inner edge of the first connecting member 10 and is located between the first connecting member 10 and the third connecting member 30. In this embodiment, the third connecting member 30 is prepared with a standard size and has a high precision. However, the inner hole 13 of the first connecting member 10 may have a certain manufacturing error during the manufacturing process.

[0103] It is understandable that the threaded connection between the first connector 10 and the third connector 30 is realized by using the wire screw sleeve 60, which can eliminate the manufacturing error of the inner hole 13 of the first connector 10, thereby improving the connection strength between the third connector 30 and the first connector 10. It also improves the connection strength between the battery pack 200 of the present application and the vehicle body cross beam 3011.

[0104] On the other hand, since the first connector 10 is made of the same material as the battery tray 202, when the first connector 10 is made of a material with lower strength, illustratively, the first connector 10 is made of aluminum. The wire screw sleeve 60 can also prevent the first connector 10 from slipping, misaligned threads, etc. when the third connector 30 is screwed in, further ensuring the connection strength between the third connector 30 and the first connector 10. Improve the connection strength between the battery pack 200 of the present application and the vehicle body crossbeam 3011.

[0105] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0107] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in the field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in the field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this utility model still fall within the scope covered by this utility model.

Claims

1. A connection structure for connecting a vehicle body and a battery pack, characterized in that: include: A first connector, a second connector and a third connector, the first connector is used to connect the battery pack, the third connector is used to connect the vehicle body, the first connector and the second connector are threadedly connected, the first connector and the third connector are threadedly connected, and the second connector is located between the vehicle body and the battery pack.

2. The connection structure according to claim 1, characterized in that: The first connecting member is provided with an external thread, the second connecting member is provided with an internal thread, and the second connecting member is sleeved on the outer edge of the first connecting member and is threadedly connected to the first connecting member.

3. The connection structure according to claim 2, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, a thread engagement height between the external thread of the first connecting member and the internal thread of the second connecting member is greater than or equal to 8 mm.

4. The connection structure according to claim 2, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, the second connecting member includes a first section and a second section that are connected, the first section and the second section are both annular, the end surface of the first section facing away from the second section is used to support the battery pack, and / or, the end surface of the second section facing away from the first section is used to support the vehicle body.

5. The connection structure according to claim 4, characterized in that: The diameter of the inner circumference of the first section is equal to the diameter of the inner circumference of the second section, and along the arrangement direction of the battery pack and the vehicle body, the internal thread of the second connecting member is at least provided on the inner circumference of the first section.

6. The connection structure according to claim 4, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, a projection of the second section on the first section is contained within the first section.

7. The connection structure according to claim 2, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, the first connecting member includes a third section and a fourth section connected to each other, the third section is used to be fixedly connected to the battery pack, the fourth section is used to cooperate with the third connecting member to be fixedly connected to the vehicle body, and the external thread of the first connecting member is arranged on the outer peripheral surface of the fourth section.

8. The connection structure according to claim 7, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, the projection of the fourth section on the third section is contained within the third section.

9. The connection structure according to claim 7, characterized in that: The first connecting member is provided with an internal thread, the third connecting member is provided with an external thread, and the third connecting member extends into the first connecting member and is threadedly connected to the first connecting member; Along the arrangement direction of the battery pack and the vehicle body, an inner hole is provided on the surface of the fourth section facing away from the third section, the inner hole passes through the fourth section and extends into the third section, and the internal thread of the first connecting member is provided on at least a portion of the hole wall of the inner hole.

10. The connection structure according to claim 9, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, the third connecting member includes a connected screw rod and an end head, a projection of the screw rod on the end head is received on the end head, and an external thread of the third connecting member is provided on the screw rod; The screw rod is used to pass through the body cross beam of the vehicle body and extend into the inner hole to be threadedly connected with the first connecting member, and the end head is used to abut against the body cross beam as the screw rod is extended to achieve a fixed connection between the first connecting member and the body cross beam.

11. The connection structure according to claim 9, characterized in that: The fourth section is annular, and the difference between the outer diameter of the fourth section and the outer diameter of the thread of the internal thread of the first connecting member is greater than or equal to 8 mm.

12. A battery pack, characterized in that: It comprises a battery tray and a connecting structure as claimed in any one of claims 1 to 11, wherein the first connecting member of the connecting structure is connected to the battery tray.

13. The battery pack according to claim 12, characterized in that: The battery tray comprises a bottom plate, side beams, and a spacer beam, wherein the side beams and the spacer beam are fixed to a surface of the bottom plate facing the vehicle body; The side beams are arranged around the periphery of the bottom plate and surround the spacing beams. Along the length direction of the spacing beams, the opposite ends of the spacing beams are fixedly connected to the side beams. The first connecting member is fixedly connected to the side beams or the spacing beams.

14. The battery pack according to claim 13, characterized in that: The first connecting member is embedded in and fixed in the spacer beam or the side beam from the spacer beam or the side beam toward the end surface of the vehicle body.

15. The battery pack according to claim 14, characterized in that: Along the arrangement direction of the battery pack and the vehicle body, the depth of the first connecting member embedded in the spacer beam or the side beam is greater than or equal to 45 mm.

16. The battery pack according to claim 12, characterized in that: The battery pack also includes a shell and a battery group, the shell seals the battery tray, the battery tray accommodates the battery group, and along the arrangement direction of the battery pack and the vehicle body, the end of the first connecting member away from the battery tray passes through the shell and is used to cooperate with the third connecting member to be fixedly connected to the vehicle body.

17. A vehicle, characterized in that: It comprises a vehicle body and a battery pack as described in any one of claims 12 to 16, wherein the vehicle body is provided with a vehicle body cross beam, and the connecting structure of the battery pack is fixedly connected to the vehicle body cross beam.

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