Lower box body of battery pack, battery pack and vehicle

Abstract

The utility model discloses a lower box body of a battery pack, the battery pack and a vehicle. A battery pack belongs to the technical field of vehicles, a lower box body of the battery pack is provided with a battery containing groove, an inner edge and an outer edge are formed at a groove opening of the battery containing groove of the lower box body, the outer edge is wound on one side, far away from the battery containing groove, of the inner edge, the inner edge is suitable for being matched with an upper cover of the battery pack in a sealing mode, and the outer edge is provided with a connecting protrusion. The connecting protrusion is provided with at least one threaded hole, the threaded hole is suitable for being connected with a vehicle body mounting beam above the threaded hole through a fastening bolt, the screwing-in end of the threaded hole is located at the upper end of the connecting protrusion, the fastening bolt can be assembled from top to bottom, an operator has a large operation space, the assembling difficulty of the lower box body and the vehicle body mounting beam can be reduced, and the assembling efficiency is improved. And the assembling efficiency of the lower box body and the vehicle body mounting beam is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and more specifically, to a lower housing of a battery pack, a battery pack, and a vehicle. Background Technology

[0002] In related technologies, when assembling a battery pack with a vehicle body, bolts are usually passed through the battery pack from bottom to top and then connected to the vehicle body. The operating space under the battery pack is small, making it inconvenient for operators to screw the bolts upwards, which is not conducive to the assembly of the battery pack. Utility Model Content

[0003] This utility model aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this utility model proposes a lower housing for a battery pack, which facilitates the assembly of the lower housing with the vehicle body mounting beam.

[0004] This utility model also proposes a battery pack having the aforementioned lower casing.

[0005] This utility model also proposes a vehicle with a battery pack.

[0006] According to an embodiment of the present utility model, the lower housing of the battery pack has a battery receiving groove. The lower housing has an inner edge and an outer edge formed at the opening of the battery receiving groove. The outer edge is arranged around the inner edge on the side away from the battery receiving groove. The inner edge is adapted to seal with the upper cover of the battery pack. The outer edge has a connecting protrusion. The connecting protrusion has at least one threaded hole. The threaded hole is adapted to be connected to the vehicle body mounting beam above it by fastening bolts. The screw-in end of the threaded hole is located at the upper end of the connecting protrusion.

[0007] According to an embodiment of the present invention, the lower housing of the battery pack has an inner edge and an outer edge formed at the opening of the battery receiving slot. The inner edge is sealed to the upper cover of the battery pack, and the outer edge has a connecting protrusion. The connecting protrusion has at least one threaded hole, and the screw-in end of the threaded hole is located at the upper end of the connecting protrusion. The fastening bolts connecting the vehicle body mounting beam and the threaded hole can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, so as to facilitate the assembly of the lower housing and the vehicle body mounting beam.

[0008] According to some embodiments of the present invention, the lower housing includes: a surrounding panel assembly, the upper end of which has the inner edge and the outer edge; and a bottom plate, which is connected to the lower end of the surrounding panel assembly and together defines the battery receiving slot.

[0009] According to some embodiments of the present invention, the enclosure assembly includes: multiple side panels, which are connected end to end in sequence, and each side panel is a single piece.

[0010] According to some embodiments of the present invention, the enclosure assembly further includes: a wire thread sleeve, the wire thread sleeve corresponding to the threaded hole, and the wire thread sleeve being installed in the threaded hole corresponding to it.

[0011] According to some embodiments of the present invention, the enclosure assembly includes: a plurality of side plates, each side plate including: a side plate body and a corresponding welding block, the plurality of side plate bodies being connected end to end in sequence, and the welding block being welded to the corresponding side plate body to form the connecting protrusion.

[0012] According to some embodiments of the present invention, the enclosure assembly includes: a plurality of side plates, each side plate including: a side plate body and a corresponding screw block, the plurality of side plate bodies being connected end to end in sequence, and the screw block being screwed to the corresponding side plate body to form the connecting protrusion.

[0013] According to some embodiments of the present invention, the side plate body has a through groove extending along the depth direction of the battery receiving groove on the side opposite to the battery receiving groove; the screw block includes: a protrusion, a connecting portion and a flange, the connecting portion is connected between the protrusion and the flange, the connecting portion is at least partially located in the through groove and screwed to the side plate body, at least part of the protrusion is located outside one end of the through groove to form the connecting protrusion, and at least part of the flange is located outside the other end of the through groove and fits against the lower end face of the side plate body.

[0014] According to another embodiment of the present invention, a battery pack includes: an upper cover, a battery module, and a lower housing of the battery pack, wherein the battery module is disposed in the battery receiving slot, and the inner edge is sealed to the upper cover.

[0015] According to the embodiment of the present utility model, the lower housing of the battery pack has an inner edge and an outer edge formed at the opening of the battery receiving groove. The inner edge is sealed with the upper cover of the battery pack, and the outer edge has a connecting protrusion. The connecting protrusion has at least one threaded hole, and the screw-in end of the threaded hole is located at the upper end of the connecting protrusion. The fastening bolts connecting the vehicle body mounting beam and the threaded hole can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, so as to facilitate the assembly of the lower housing and the vehicle body mounting beam.

[0016] According to another embodiment of the present invention, a vehicle includes: a body mounting beam, fastening bolts, and the aforementioned battery pack. The body mounting beam has a first mounting hole, the connecting protrusion is fitted with the lower end of the body mounting beam, and the fastening bolt passes through the first mounting hole from the upper end and is connected to the threaded hole.

[0017] According to the embodiment of the present invention, the lower housing of the battery pack has an inner edge and an outer edge at the opening of the battery receiving slot. The inner edge is sealed to the upper cover of the battery pack, and the outer edge has a connecting protrusion. The connecting protrusion has at least one threaded hole, and the screw-in end of the threaded hole is located at the upper end of the connecting protrusion. The fastening bolts connecting the vehicle body mounting beam and the threaded hole can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, which facilitates vehicle assembly.

[0018] According to some embodiments of the present utility model, the vehicle body mounting beam includes: an upper beam plate, a lower beam plate, and a connecting beam plate. The upper beam plate and the lower beam plate are opposite to each other in the vertical direction and are spaced apart. The connecting beam plate is connected between the upper beam plate and the lower beam plate. The lower beam plate has a first mounting hole, and the upper beam plate has a second mounting hole coaxial with the first mounting hole.

[0019] The vehicle further includes a bushing, which comprises a sleeve portion and an annular plate portion. The sleeve portion passes through the second mounting hole and abuts against the lower beam plate. The annular plate portion is connected to the sleeve portion and abuts against the upper beam plate. The fastening bolt passes through the sleeve portion and the first mounting hole and is connected to the threaded hole.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the connection between the vehicle body mounting beam and the lower box body according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the connection between the vehicle body mounting beam and the lower box body according to another embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the lower housing according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the lower housing according to another embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the lower housing according to another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of a screw block according to an embodiment of the present utility model.

[0028] Figure label:

[0029] Battery receiving slot 1; Inner edge 2;

[0030] Outer edge 3; connecting protrusion 31; threaded hole 311;

[0031] Enclosure assembly 4; side plate 41; side plate body 411; through groove 4111; rivet nut 4112; welding block 412; bolted block 413; protrusion 4131; connecting part 4132; flange part 4133; connecting hole 4134; countersunk platform 4135;

[0032] Lower casing 10; upper cover 20; battery pack 100;

[0033] Vehicle body mounting beam 200; upper beam plate 2001; second mounting hole 20012; lower beam plate 2002; first mounting hole 20021; connecting beam plate 2003;

[0034] Bushing 300; Sleeve section 3001; Ring plate section 3002;

[0035] Fastening bolts 400; connecting bolts 500; chassis beams 600. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The lower housing 10 of the battery pack 100, the battery pack 100, and the vehicle according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] Reference Figures 1-6 As shown, the lower housing 10 of the battery pack 100 has a battery receiving groove 1. The lower housing 10 has an inner edge 2 and an outer edge 3 at the opening of the battery receiving groove 1. The outer edge 3 is arranged around the inner edge 2 on the side away from the battery receiving groove 1. The inner edge 2 is adapted to seal with the upper cover 20 of the battery pack 100. The outer edge 3 has a connecting protrusion 31. The connecting protrusion 31 has at least one threaded hole 311. The threaded hole 311 is adapted to be connected to the vehicle body mounting beam 200 above it by fastening bolts 400. The screw-in end of the threaded hole 311 is located at the upper end of the connecting protrusion 31.

[0042] Specifically, the battery pack 100 can be used in a vehicle. The lower housing 10 of the battery pack 100 can be a tray-shaped structure. The lower housing 10 has a battery receiving slot 1, which can be used to fix the battery module. The lower housing 10 can protect and fix the battery module inside. At the opening of the battery receiving slot 1, the lower housing 10 has an inner edge 2 and an outer edge 3. The inner edge 2 is located inside the outer edge 3. The upper cover 20 of the battery pack 100 can cover the battery receiving slot 1 above the battery receiving slot 1. The upper cover 20 can form a sealing fit with the inner edge 2 through a sealing gasket so that the battery receiving slot 1 forms a closed space. The upper cover 20 and the lower housing 10 can together form the outer shell of the battery pack 100.

[0043] The outer edge 3 is wrapped around the outside of the inner edge 2. The outer edge 3 has a connecting protrusion 31. The connecting protrusion 31 can be higher than the height of the inner edge 2. The inner side of the connecting protrusion 31 can be positioned and engaged with the upper cover 20 to facilitate the assembly of the upper cover 20. The upper surface of the connecting protrusion 31 can abut against the body mounting beam 200, which can be installed on the chassis beam 600 of the vehicle. The connecting protrusion 31 can raise the height of the outer edge 3 to reduce the risk of interference between the upper cover 20 and the body structure. The connecting protrusion 31 has at least one threaded hole 311 connected to the body mounting beam 200 above it. The screw-in end of the threaded hole 311 is located at the upper end of the connecting protrusion 31. That is to say, the fastening bolt 400 connecting the body mounting beam 200 and the threaded hole 311 can pass through the body mounting beam 200 from top to bottom and then be screwed into the threaded hole 311 from the screw-in end of the threaded hole 311. The fastening bolt 400 is assembled from top to bottom, which provides the operator with a large operating space, reduces the assembly difficulty of the lower box 10 and the body mounting beam 200, and improves the assembly efficiency of the lower box 10 and the body mounting beam 200.

[0044] According to the embodiment of the present utility model, the lower housing 10 of the battery pack 100 has an inner edge 2 and an outer edge 3 formed at the opening of the battery receiving groove 1. The inner edge 2 is sealed to the upper cover 20 of the battery pack 100. The outer edge 3 has a connecting protrusion 31. The connecting protrusion 31 has at least one threaded hole 311, and the screw-in end of the threaded hole 311 is located at the upper end of the connecting protrusion 31. The fastening bolt 400 connecting the vehicle body mounting beam 200 and the threaded hole 311 can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, so as to facilitate the assembly of the lower housing 10 and the vehicle body mounting beam 200.

[0045] In some embodiments of this utility model, reference is made to Figure 4 As shown, the lower housing 10 includes a side panel assembly 4 and a bottom plate. The upper end of the side panel assembly 4 has an inner edge 2 and an outer edge 3. The bottom plate is connected to the lower end of the side panel assembly 4 and together they define a battery receiving slot 1.

[0046] Specifically, the enclosure assembly 4 can be a polygonal closed structure, with the inner edge 2 and the outer edge 3 located at the upper end of the enclosure assembly 4. The inner edge 2 is wrapped around the outside of the battery receiving groove 1, and the outer edge 3 is wrapped around the outside of the inner edge 2. The enclosure assembly 4 can define the side wall of the battery receiving groove 1, and the bottom plate can define the bottom wall of the battery receiving groove 1. The enclosure assembly 4 and the bottom plate can be connected by welding, screwing, or other means. The structure of the lower box 10 is simple and easy to process and manufacture.

[0047] In some embodiments of this utility model, reference is made to Figure 4 As shown, the enclosure assembly 4 includes multiple side panels 41, which are connected end to end in sequence, and each side panel 41 is a single piece.

[0048] Specifically, multiple side plates 41 connected end to end can form a polygonal frame structure. Adjacent side plates 41 can be connected by welding, screwing, riveting, etc. The side plates 41 can be integral aluminum parts. The connecting protrusions 31 are integrated into the side plates 41 to reduce the number of parts in the enclosure assembly 4 and facilitate the assembly of the enclosure assembly 4.

[0049] In some embodiments of this utility model, the enclosure assembly 4 further includes a wire thread sleeve, which corresponds to the threaded hole 311 and is installed in the corresponding threaded hole 311.

[0050] Specifically, the wire thread insert can be screwed into the threaded hole 311, and the fastening bolt 400 can be screwed into the wire thread insert in the threaded hole 311. The wire thread insert can be made of stainless steel, which has high strength and rigidity to reduce the risk of stripping or failure of the threaded hole 311. This helps to improve the connection strength and reliability between the lower box 10 and the vehicle body mounting beam 200, and reduces the risk of connection failure between the lower box 10 and the vehicle body mounting beam 200.

[0051] In other embodiments of this utility model, reference is made to Figure 5 As shown, the enclosure assembly 4 includes: multiple side panels 41, each side panel 41 including: a side panel body 411 and a corresponding welding block 412, the multiple side panel bodies 411 are connected end to end in sequence, and the welding block 412 is welded to the corresponding side panel body 411 to form a connecting protrusion 31.

[0052] Specifically, the side plate body 411 can be a flat structural component. Multiple side plate bodies 411 connected end to end can form a polygonal frame structure. Adjacent side plate bodies 411 can be connected by welding, screwing, riveting, etc. Each side plate 41 can have one or more corresponding welding blocks 412. The welding blocks 412 are welded to the corresponding side plate body 411 to form a connecting protrusion 31. That is to say, the side plate 41 is formed by welding and assembling the separate side plate body 411 and the welding blocks 412. The structure of the welding blocks 412 and the side plate body 411 is simple and easy to manufacture, thereby reducing the manufacturing difficulty and cost of the side plate 41. In addition, the side plate 41 is not a one-piece molded part. The welding blocks 412 can be solid structures to facilitate the processing of the threaded holes 311 on them. The side plate body 411 can be hollow structures to reduce the weight and cost of the side plate body 411.

[0053] In some other embodiments of this utility model, reference is made to... Figure 6 and Figure 7As shown, the enclosure assembly 4 includes: multiple side plates 41, each side plate 41 including: a side plate body 411 and a corresponding screw block 413, the multiple side plate bodies 411 are connected end to end in sequence, and the screw block 413 is screwed to the corresponding side plate body 411 to form a connecting protrusion 31.

[0054] Specifically, the side plate body 411 can be a flat structural component. Multiple side plate bodies 411 connected end to end can form a polygonal frame structure. Adjacent side plate bodies 411 can be connected by welding, screwing, riveting, etc. Each side plate 41 can have one or more corresponding screw blocks 413. The screw blocks 413 are screwed to the corresponding side plate body 411 to form a connecting protrusion 31. That is to say, the side plate 41 is formed by screwing together the split side plate body 411 and the screw blocks 413. The structure of the screw blocks 413 and the side plate body 411 is simple and easy to manufacture, thereby reducing the manufacturing difficulty and cost of the side plate 41. In addition, when the side plate 41 is an aluminum insert, the strength of the aluminum insert will be reduced at the welding position, which is prone to stress concentration. The screw block 413 is screwed to the corresponding side plate body 411 to ensure the connection strength between the screw block 413 and the side plate body 411, and avoid the overall strength of the lower housing 10 will decrease.

[0055] In some embodiments of this utility model, reference is made to Figure 6 and Figure 7 As shown, the side plate body 411 has a through groove 4111 extending along the depth direction of the battery receiving groove 1 on the side opposite to the battery receiving groove 1. The screw block 413 includes a protrusion 4131, a connecting portion 4132 and a flange portion 4133. The connecting portion 4132 is connected between the protrusion 4131 and the flange portion 4133. The connecting portion 4132 is at least partially located in the through groove 4111 and screwed to the side plate body 411. At least part of the protrusion 4131 is located outside one end of the through groove 4111 to form a connecting protrusion 31. At least part of the flange portion 4133 is located outside the other end of the through groove 4111 and fits against the lower end face of the side plate body 411.

[0056] Specifically, the depth direction of the battery receiving groove 1 can be the vertical direction of the vehicle. The side plate body 411 has a vertical through groove 4111 on the side opposite to the battery receiving groove 1. The through groove 4111 can be positioned and engaged with the screw block 413 to facilitate the assembly of the screw block 413.

[0057] The protrusion 4131 of the screw block 413 is at least partially located outside one end of the through groove 4111 to form a connecting protrusion 31. The connecting portion 4132 of the screw block 413 is at least partially located inside the through groove 4111 and screwed to the side plate body 411. That is, the connecting portion 4132 can be embedded in the side plate body 411 to increase the contact area between the connecting portion 4132 and the side plate body 411, thereby improving the stability and reliability of the connection between the screw block 413 and the side plate body 411. At least part of the flange 4133 of the screw block 413 is located outside the other end of the through groove 4111 and fits against the lower end face of the side plate body 411. The flange 4133 can hold the side plate body 411 at the lower end of the side plate body 411 to improve the reliability of the connection between the screw block 413 and the side plate body 411.

[0058] When the protrusion 4131 forming the connecting protrusion 31 is subjected to load, the protrusion 4131 can evenly distribute the force to the side plate body 411 through the connecting part 4132 and the flange part 4133, so as to avoid local stress concentration of the bolt block 413 and the side plate body 411, thereby improving the reliability and service life of the bolt block 413.

[0059] In some embodiments of this utility model, reference is made to Figure 6 and Figure 7 As shown, the connecting part 4132 has multiple connecting holes 4134, and the side plate body 411 has multiple rivet nuts 4112. The multiple connecting holes 4134 correspond one-to-one with the multiple rivet nuts 4112. The connecting holes 4134 can be connected to the rivet nuts 4112 by connecting bolts 500. The connecting holes 4134 may have a countersunk platform 4135 opposite to the rivet nuts 4112. At least a part of the rivet nuts 4112 can be located in the countersunk platform 4135, which reduces the space occupied by the connecting part 4132 and improves the space utilization rate.

[0060] Reference Figures 1-7 As shown, the battery pack 100 according to another embodiment of the present invention includes: an upper cover 20, a battery module and a lower housing 10 of the battery pack 100 of the above embodiment. The battery module is disposed in the battery receiving groove 1, and the inner edge 2 is sealed to the upper cover 20.

[0061] According to the embodiment of the present utility model, the lower box 10 of the battery pack 100 has an inner edge 2 and an outer edge 3 formed at the opening of the battery receiving groove 1. The inner edge 2 is sealed with the upper cover 20 of the battery pack 100. The outer edge 3 has a connecting protrusion 31. The connecting protrusion 31 has at least one threaded hole 311, and the screw-in end of the threaded hole 311 is located at the upper end of the connecting protrusion 31. The fastening bolt 400 connecting the vehicle body mounting beam 200 and the threaded hole 311 can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, so as to facilitate the assembly of the lower box 10 and the vehicle body mounting beam 200.

[0062] Reference Figure 1 and Figure 2 As shown, a vehicle according to another embodiment of the present invention includes: a body mounting beam 200, a fastening bolt 400, and a battery pack 100 as described in the above embodiment. The body mounting beam 200 has a first mounting hole 20021, a connecting protrusion 31 is attached to the lower end of the body mounting beam 200, and the fastening bolt 400 passes through the first mounting hole 20021 from the upper end of the first mounting hole 20021 and is connected to a threaded hole 311.

[0063] According to the vehicle of the present utility model embodiment, the lower box 10 of the battery pack 100 has an inner edge 2 and an outer edge 3 formed at the groove opening of the battery receiving groove 1. The inner edge 2 is sealed with the upper cover 20 of the battery pack 100. The outer edge 3 has a connecting protrusion 31. The connecting protrusion 31 has at least one threaded hole 311, and the screw-in end of the threaded hole 311 is located at the upper end of the connecting protrusion 31. The fastening bolt 400 connecting the vehicle body mounting beam 200 and the threaded hole 311 can be assembled from top to bottom. The operator has a large operating space and is convenient to apply force, which is convenient for vehicle assembly.

[0064] In some embodiments of this utility model, reference is made to Figure 3 As shown, the vehicle body mounting beam 200 includes: an upper beam plate 2001, a lower beam plate 2002, and a connecting beam plate 2003. The upper beam plate 2001 and the lower beam plate 2002 are arranged opposite to each other in the vertical direction and are spaced apart. The connecting beam plate 2003 is connected between the upper beam plate 2001 and the lower beam plate 2002. The lower beam plate 2002 has a first mounting hole 20021, and the upper beam plate 2001 has a second mounting hole 20012 that is coaxial with the first mounting hole 20021. The vehicle also includes: a bushing 300, which includes: a sleeve portion 3001 and an annular plate portion 3002. The sleeve portion 3001 passes through the second mounting hole 20012 and abuts against the lower beam plate 2002. The annular plate portion 3002 is connected to the sleeve portion 3001 and abuts against the upper beam plate 2001. A fastening bolt 400 passes through the sleeve portion 3001 and the first mounting hole 20021 and is connected to the threaded hole 311.

[0065] Specifically, the upper beam plate 2001 and the lower beam plate 2002 are arranged opposite to each other and spaced apart in the vertical direction. The number of connecting beam plates 2003 can be one or more. The connecting beam plates 2003 are connected between the upper beam plate 2001 and the lower beam plate 2002. The vehicle body mounting beam 200 can be a hollow beam structure to reduce the weight of the vehicle body mounting beam 200 and achieve lightweighting of the vehicle body mounting beam 200.

[0066] The lower beam plate 2002 has a first mounting hole 20021, and the upper beam plate 2001 has a second mounting hole 20012. The first mounting hole 20021 and the second mounting hole 20012 are coaxially arranged. The sleeve part 3001 passes through the second mounting hole 20012 and abuts against the lower beam plate 2002. The ring plate part 3002 is connected to the sleeve part 3001 and abuts against the upper beam plate 2001. The fastening bolt 400 passes through the sleeve and the first mounting hole 20021 and is connected to the threaded hole 311. Thus, the sleeve part 3001 can form a support force transmission structure between the upper beam plate 2001 and the lower beam plate 2002 to reduce the risk of deformation of the vehicle body mounting beam 200.

[0067] In some embodiments, refer to Figure 3 As shown, the ring plate portion 3002 abuts against the upper beam plate 2001 away from the upper end face of the lower beam plate 2002. When the fastening bolt 400 is tightened, the head of the fastening bolt 400 can apply downward pressure to the ring plate portion 3002. The ring plate portion 3002 can transmit the pressure downward to the lower beam plate 2002 through the sleeve portion 3001 to reduce the risk of deformation of the upper beam plate 2001 at the second mounting hole 20012.

[0068] In other embodiments (not shown in the figures), the ring plate portion 3002 abuts against the lower end face of the upper beam plate 2001 near the lower beam plate 2002. When the fastening bolt 400 is tightened, the head of the fastening bolt 400 can apply downward pressure to the upper beam plate 2001. The upper beam plate 2001 can transmit the pressure downward to the lower beam plate 2002 through the sleeve portion 3001 via the ring plate portion 3002 below it, thereby reducing the risk of deformation of the upper beam plate 2001 at the second mounting hole 20012.

[0069] The vehicle according to the present utility model embodiment can be a new energy commercial vehicle. The battery pack 100 can be installed by fixing from the top. A threaded hole 311 is opened on the lower box 10, and a wire thread sleeve can be installed. The fastening bolt 400 is fastened from the top, making installation and disassembly simpler and more convenient.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A lower case of a battery pack, characterized by, The lower box has a battery accommodating groove (1), and an inner edge (2) and an outer edge (3) are formed at the groove opening of the battery accommodating groove (1), the outer edge (3) is arranged on the side of the inner edge (2) away from the battery accommodating groove (1), the inner edge (2) is suitable for sealingly cooperating with the upper cover (20) of the battery pack, the outer edge (3) has a connecting protrusion (31), the connecting protrusion (31) is provided with at least one threaded hole (311), the threaded hole (311) is suitable for being connected with the vehicle body mounting beam (200) above it through a fastening bolt (400), and the screwing end of the threaded hole (311) is located at the upper end of the connecting protrusion (31).

2. The lower case of the battery pack according to claim 1, characterized by, The lower box comprises: a coaming assembly (4), the upper end of the coaming assembly (4) is formed with the inner edge (2) and the outer edge (3); a bottom plate connected with the lower end of the coaming assembly (4) and defining the battery accommodating groove (1) together with the coaming assembly (4).

3. The lower case of the battery pack according to claim 2, characterized by, The coaming assembly (4) comprises a plurality of side plates (41), and the plurality of side plates (41) are sequentially connected end to end, and each side plate (41) is an integral piece.

4. The lower case of the battery pack according to claim 3, characterized by, The coaming assembly (4) further comprises a steel wire screw sleeve corresponding to the threaded hole (311), and the steel wire screw sleeve is installed in the threaded hole (311) corresponding thereto.

5. The lower case of the battery pack according to claim 2, characterized by, The coaming assembly (4) comprises a plurality of side plates (41), and each side plate (41) comprises a side plate body (411) and a corresponding welding block (412), a plurality of side plate bodies (411) are sequentially connected end to end, and the welding block (412) is welded to the corresponding side plate body (411) to form the connecting protrusion (31).

6. The lower case of the battery pack according to claim 2, characterized by, The coaming assembly (4) comprises a plurality of side plates (41), and each side plate (41) comprises a side plate body (411) and a corresponding threaded block (413), a plurality of side plate bodies (411) are sequentially connected end to end, and the threaded block (413) is screwed to the corresponding side plate body (411) to form the connecting protrusion (31).

7. The lower case of the battery pack according to claim 6, characterized by, The side plate body (411) has a through groove (4111) extending in the depth direction of the battery accommodating groove (1) on the side away from the battery accommodating groove (1); The threaded block (413) comprises a protruding portion (4131), a connecting portion (4132) and a flange portion (4133), the connecting portion (4132) is connected between the protruding portion (4131) and the flange portion (4133), the connecting portion (4132) is at least partially located in the through groove (4111) and is screwed to the side plate body (411), at least part of the protruding portion (4131) is located outside one end of the through groove (4111) to form the connecting protrusion (31), and at least part of the flange portion (4133) is located outside the other end of the through groove (4111) and abuts against the lower end surface of the side plate body (411).

8. A battery pack, characterized by, It comprises: The upper cover (20), the battery module arranged in the battery accommodating groove (1), and the lower box body of the battery pack according to any one of claims 1-7 are in sealing fit with the inner edge (2).

9. A vehicle characterized by comprising: Comprise: The vehicle body mounting beam (200) has a first mounting hole (20021), the connecting protrusion (31) is attached to the lower end of the vehicle body mounting beam (200), and the fastening bolt (400) passes through the first mounting hole (20021) from the upper end of the first mounting hole (20021) and is connected with the threaded hole (311).

10. The vehicle of claim 9, wherein, The vehicle body mounting beam (200) comprises an upper beam plate (2001), a lower beam plate (2002), and a connecting beam plate (2003), the upper beam plate (2001) and the lower beam plate (2002) are oppositely arranged and spaced apart in the up-down direction, and the connecting beam plate (2003) is connected between the upper beam plate (2001) and the lower beam plate (2002), the lower beam plate (2002) has the first mounting hole (20021), and the upper beam plate (2001) has a second mounting hole (20012) coaxial with the first mounting hole (20021); The vehicle further comprises a bushing (300), the bushing (300) comprises a sleeve portion (3001) and a ring plate portion (3002), the sleeve portion (3001) is arranged through the second mounting hole (20012) and abuts against the lower beam plate (2002), the ring plate portion (3002) is connected with the sleeve portion (3001) and abuts against the upper beam plate (2001), and the fastening bolt (400) is arranged through the sleeve portion (3001) and the first mounting hole (20021) and connected with the threaded hole (311).

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