Support structure, support structure assembly method, battery pack and automobile

Abstract

The present application relates to a support structure, which includes: a support side beam, the support side beam includes a side beam body, an upper beam plate and a lower beam plate, the side beam body is used to be fixedly connected to the battery pack, and the upper beam plate or the lower beam plate is used to abut against the vehicle body; a bolt assembly fixes the support side beam to the vehicle body; and a support assembly is arranged between the upper beam plate and the lower beam plate, and supports the upper beam plate and the lower beam plate, and the height of the support assembly is adjustable. The support structure disclosed in the present application realizes the reinforcement of the rigidity of the support side beam through the support assembly, without considering the distribution of the force between the support assembly and the support side beam, so that the preload force provided by the bolt assembly acts entirely on the support side beam, and the positive pressure acting on the support side beam is truly known and designable in the early design stage, and can be tested and monitored in the later assembly stage, thereby ensuring the stability of the battery pack on the vehicle body while avoiding abnormal deformation of the support side beam due to excessive pressure.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a support structure, an assembly method of a support structure, a battery pack and a vehicle. Background Art

[0002] like Figure 1 As shown, new energy vehicles usually have their battery packs fixedly connected to the vehicle body 2 via a supporting side beam 1. The supporting side beam 1 and the vehicle body 2 are usually fixedly connected via a bolt assembly 3, which includes a pair of vehicle fixing bolts 31 and vehicle fixing nuts 32 that cooperate with each other. The location of the bolts 31 and the vehicle fixing nuts 32 are usually referred to as "mounting points", and the locking and fixing method is called "mounting point support", so that the battery pack remains stable during the driving of the vehicle.

[0003] When locking and fixing, the vehicle fixing bolt 31 passes through the supporting side beam 1 and the vehicle body 2 and is threadedly connected with the vehicle fixing nut 32. The tightening torque of the vehicle fixing bolt 31 is converted into its axial positive pressure on the vehicle body 2 and the supporting side beam 1. The positive pressure forms a friction force on the vehicle body 2 and the supporting side beam 1, which is used to support the side beam 1 to overcome the inertial force load generated by vibration, impact and other working conditions during the movement of the vehicle. Since the calculation formula of positive pressure and friction force is: f = μ*F N , where F N is the positive pressure, μ is the friction coefficient. Therefore, under the premise that the material of the supporting side beam 1 and the vehicle body 2 is constant (that is, μ is a constant), in order to ensure the stability of the battery pack during the driving of the whole vehicle, the vehicle fixing bolts 31 need to form a sufficiently large positive pressure on the vehicle body 2 and the supporting side beam 1. Usually, the value of this positive pressure is tens of kilonewtons or even hundreds of kilonewtons.

[0004] However, the supporting side beam 1 usually includes an upper beam plate 12 and a lower beam plate 13, and the upper beam plate 12 is arranged above the lower beam plate 13 at intervals, and the two are used to support the side beam 1 and fix it to the vehicle body 2. Usually, when fixedly connected, the upper beam plate 12 abuts against the lower side of the vehicle body 2, and the head of the vehicle fixing bolt 31 or the vehicle fixing nut 32 abuts against the lower beam plate 13; since the upper beam plate 12 and the lower beam plate 13 are both plate-shaped structures, their thickness is usually 1-2mm, and their material is usually aluminum, which is relatively soft. Therefore, the lower beam plate 13 is very likely to be abnormally deformed due to excessive pressure when abutted by the head of the vehicle fixing bolt 31, and the vehicle fixing bolt 31 fails, thereby affecting the stability of the battery pack.

[0005] like Figure 1 and Figure 2As shown, in the related art, a sleeve 5 is usually designed on the supporting side beam 1 to improve the compressive strength of the supporting side beam 1, so that the supporting side beam 1 is not easily deformed due to excessive pressure. The sleeve 5 has a structure with large and small ends, and both of the large and small ends are cylindrical; its small end passes through the upper beam plate 12 and approaches the lower beam plate 13, and at the same time, a certain designed gap 6 is maintained between its small end and the lower beam plate 13, and its large end abuts against the side of the upper beam plate 12 away from the lower beam plate 13. In order to ensure the stability of the sleeve 5 on the supporting side beam 1, the sleeve 5 is usually fixedly connected to the supporting side beam 1 by welding, so that the sleeve 5 and the supporting side beam 1 form an integrated structure. After the sleeve 5 is welded, a weld 51 is formed between its large end and the upper beam plate 12.

[0006] When connecting the supporting side beam 1 to the vehicle body 2, firstly make the large end of the sleeve 5 contact the lower side of the vehicle body 2, then pass the vehicle fixing bolt 31 in the bolt assembly 3 through the lower beam plate 13, the sleeve 5, the upper beam plate 12 and the vehicle body 2 in sequence, then thread the vehicle fixing nut 32 in the bolt assembly 3 with the vehicle fixing bolt 31, and then tighten the vehicle fixing bolt 31 or the vehicle fixing nut 32. At this time, the compression of the vehicle body 2 and the vehicle fixing bolt 31 on the supporting side beam 1 is converted into the compression of the vehicle body 2 and the vehicle fixing bolt 31 on the integrated structure composed of the supporting side beam 1 and the sleeve 5. Although it can make the supporting side beam 1 less likely to be deformed by pressure to a certain extent, it still has major defects, as follows:

[0007] First, the supporting side beam 1 and the sleeve 5 form an integrated structure to jointly bear the positive pressure from the vehicle body 2 and the vehicle fixing bolts 31, and the positive pressure received by the supporting side beam 1 alone is unknown.

[0008] In this technical solution, when the vehicle body 2 is locked and fixed with the integrated structure consisting of the supporting side beam 1 and the sleeve 5 by means of the bolt assembly 3, the first thing to be compressed in the integrated structure is the supporting side beam 1 with relatively weak rigidity. At this time, the lower beam plate 13 and the upper beam plate 12 are pressed closer to each other until the designed gap 6 between the lower beam plate 13 and the small end of the sleeve 5 is zero, that is, until the lower beam plate 13 abuts against the small end of the sleeve 5. At this time, the sleeve 5 with relatively strong rigidity is mainly compressed, and the supporting side beam 1 only bears a small part of the compression load. Since the supporting side beam 1 and the sleeve 5 are an integrated structure, the load distribution relationship between the two is difficult to determine, that is, the positive pressure borne by the supporting side beam 1 is unknown in practice. Since the positive pressure acting on the supporting side beam 1 is provided by the preload force of the bolt assembly 3, the two are in a proportional relationship. The preload force is difficult to design during the design stage because the positive pressure acting on the supporting side beam 1 is difficult to determine, and it is also difficult to monitor and control it during the assembly stage; however, the preload force needs to be within an appropriate design range. If it is too large, it is easy to cause the supporting side beam 1 to be over-pressurized and produce abnormal deformation. If it is too small, it cannot be used to support the side beam 1 to overcome the inertial force load generated by vibration, impact and other working conditions during the movement of the vehicle.

[0009] Second, the size requirement of the designed gap 6 between the lower beam plate 13 and the small end of the sleeve 5 is relatively high.

[0010] The designed gap 6 between the small end of the sleeve 5 and the lower beam plate 13 is used, on the one hand, to ensure that the bolt assembly 3 can effectively compress the supporting side beam 1. If the sleeve 5 is too long, the bolt assembly 3 can only compress the sleeve 5; on the other hand, it is used to absorb the processing tolerance of the height dimension of the sleeve 5 and the distance dimension between the upper beam plate 12 and the lower beam plate 13. This is because the large end of the sleeve 5 is in contact with the upper beam plate 12 to form an axial positioning of the sleeve 5. To prevent repeated positioning, the small end of the sleeve 5 must be suspended. Therefore, the size and tolerance of the designed gap 6 must be controlled within an extremely small range. Otherwise, if the sleeve 5 is too long, the bolt assembly 3 will directly compress the vehicle body 2 and the sleeve 5, and will not effectively compress the supporting side beam 1, and the positive pressure acting on the upper beam plate 1 cannot be guaranteed; or if the sleeve 5 is too short, the bolt assembly 3 will over-compress the supporting side beam 1, causing abnormal deformation of the upper beam plate 12 or the lower beam plate 13, and also making it impossible to guarantee the positive pressure acting on the upper beam plate 1.

[0011] Third, when the sleeve 5 is fixed to the supporting side beam 1 by welding, there are special requirements for the material of the sleeve 5 .

[0012] Since the material of the supporting side beam 1 is usually aluminum, in order to reduce the cost of welding and ensure the weldability between the supporting side beam 1 and the sleeve 5, the sleeve 5 can only be made of aluminum. However, the sleeve 5 made of aluminum has poor rigidity, and the welding quality during welding is difficult to control, and the thermal deformation caused by welding is difficult to observe and control. Steel or other materials with harder material and better rigidity cannot be well fixed to the supporting side beam 1 made of aluminum through welding. Summary of the invention

[0013] In order to solve the above-mentioned related problems, the present application provides a support structure, an assembly method of the support structure, a battery pack and a car.

[0014] In a first aspect, the present application provides a support structure, which adopts the following technical solution:

[0015] A support structure for fixing a battery pack to a vehicle body, comprising: a supporting side beam, the supporting side beam comprising a side beam body, an upper beam plate and a lower beam plate, the side beam body being used for fixing the battery pack, the upper beam plate being arranged on one side of the side beam body, the upper beam plate being arranged below the upper beam plate at intervals, and the upper beam plate or the lower beam plate being used for abutting against the vehicle body;

[0016] A bolt assembly, which passes through the upper beam plate, the lower beam plate and the vehicle body, so as to fix the supporting side beam to the vehicle body;

[0017] and a support assembly, which is arranged between the upper beam plate and the lower beam plate and supports the upper beam plate and the lower beam plate, and the height of the support assembly is adjustable.

[0018] Optionally, the support assembly includes:

[0019] A sleeve member, wherein the sleeve member is sleeved on the bolt assembly, and one end of the sleeve member is in contact with one of the upper beam plate and the lower beam plate;

[0020] and a washer member, wherein the washer member is sleeved on the other end of the sleeve member, and the washer member abuts against the other of the upper beam plate and the lower beam plate;

[0021] Preferably, a sleeve boss is provided at one end of the sleeve member away from the washer member, and the sleeve boss abuts against the upper beam plate or the lower beam plate.

[0022] Optionally, the sleeve member is threadedly connected to the washer member to adjust the height of the support assembly.

[0023] Optionally, a stiffening plate is provided between the upper beam plate and the lower beam plate, a limiting notch is provided on the stiffening plate, the washer is provided in the limiting notch and abuts against the stiffening plate to form a rotation limit.

[0024] Optionally, the gasket member is provided with limit platforms on both sides along the thickness direction of the stiffening plate, one of the two limit platforms abuts against one side of the thickness direction of the stiffening plate, and the other of the two limit platforms abuts against the other side of the thickness direction of the stiffening plate.

[0025] Optionally, the inner side wall of the sleeve member is configured as a polygon, and / or the outer side wall of the sleeve boss is configured as a polygon, so as to facilitate connection with a disassembly tool.

[0026] Optionally, an outer beam plate is provided between the upper beam plate and the lower beam plate, the outer beam plate is provided on a side of the stiffening plate away from the side beam body, and a window for the support assembly to pass through is provided on the outer beam plate; and / or

[0027] A side beam inclined plate is provided between the lower beam plate and the side beam body, and the side beam inclined plate is provided with a through hole for the bolt assembly to pass through.

[0028] In a second aspect, the present application provides a method for assembling a support structure, which adopts the following technical solution:

[0029] A method for assembling a support structure, comprising:

[0030] Processing the support assembly into shape;

[0031] The support assembly is arranged between the upper beam plate and the lower beam plate;

[0032] Adjusting the height of the support assembly so that the support assembly supports the upper beam plate and the lower beam plate and applies a torque to a first design value;

[0033] Connecting the side beam to the vehicle body, and passing the bolt assembly through the upper beam plate, the lower beam plate and the vehicle body to fix the supporting side beam to the vehicle body;

[0034] The bolt assembly is torqued to a second design value.

[0035] In a third aspect, the present application provides a battery pack, which adopts the following technical solution:

[0036] A battery pack, comprising:

[0037] Battery pack body;

[0038] and a supporting structure, wherein the supporting structure is arranged on the battery pack body and is used to fix the battery pack body to the vehicle body.

[0039] In a fourth aspect, the present application provides a car, which adopts the following technical solution:

[0040] A car, comprising:

[0041] Car body;

[0042] Battery pack;

[0043] and a supporting structure, wherein the supporting structure fixedly connects the battery pack to the vehicle body.

[0044] In summary, this application includes the following beneficial technical effects:

[0045] The support structure disclosed in the present application achieves the reinforcement of the rigidity of the support side beam through the support assembly without considering the distribution of the force between the support assembly and the support side beam, so that the preload force provided by the bolt assembly acts entirely on the support side beam, and the positive pressure acting on the support side beam is truly known and designable in the early design stage, and can be tested and monitored in the later assembly stage, thereby ensuring the stability of the battery pack on the vehicle body while avoiding abnormal deformation of the support side beam due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a cross-sectional view of the connection between the supporting side beam and the vehicle body in the related art;

[0047] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0048] Figure 3 This is a schematic diagram of the structure of the connection between the support structure and the vehicle body provided by an embodiment of the present application;

[0049] Figure 4 It is a schematic diagram of a rectangular frame structure formed by supporting side beams provided in an embodiment of the present application;

[0050] Figure 5 is an exploded view of a support assembly provided in one embodiment of the present application;

[0051] Figure 6 is a schematic structural diagram of a supporting side beam provided in an embodiment of the present application;

[0052] Figure 7 It is a cross-sectional view of a supporting side beam provided in one embodiment of the present application.

[0053] Explanation of the reference numerals in the accompanying drawings: 1. Support side beam; 11. Side beam body; 111. Connecting plate; 12. Upper beam plate; 13. Lower beam plate; 14. Stiffening plate; 141. Limiting notch; 15. Outer beam plate; 151. Window; 16. Side beam inclined plate; 161. Through hole; 2. Vehicle body; 3. Bolt assembly; 31. Vehicle fixing bolt; 32. Vehicle fixing nut; 4. Support assembly; 41. Sleeve member; 411. Sleeve boss; 42. Washer member; 421. Limiting platform; 5. Sleeve; 51. Weld; 6. Design gap. DETAILED DESCRIPTION

[0054] The following is combined with Figure 3-7 This application is described in further detail.

[0055] Reference Figure 3 and Figure 4 An embodiment of the present application discloses a support structure for fixing a battery pack to a vehicle body, which includes a support side beam 1, a bolt assembly 3 and a support assembly 4.

[0056] Specifically, the supporting side beam 1 may include a side beam body 11, an upper beam plate 12 and a lower beam plate 13. The side beam body 11 is used to be fixedly connected to the battery pack. It can be set as a hollow structure, and the cross section can be set as a rectangle. A connecting plate 111 can be tilted in the side beam body 11 to enhance its structural strength. The side beam body 11 is usually provided with four beams, and they are enclosed to form a rectangular frame structure to support the battery pack, and the battery pack is fixedly mounted on the rectangular frame structure. The upper beam plate 12 and the lower beam plate 13 can both be set as rectangular plate structures. The upper beam plate 12 can be set on one side of the side beam body 11. In this embodiment, the upper beam plate 12 is set on the outside of the rectangular frame structure enclosed by the four side beam bodies 11, and the upper beam plate 12 can be flush with the upper side of the side beam body 11. The lower beam plate 13 is arranged below the upper beam plate 12 at intervals, and the lower beam plate 13 can be arranged in the middle of the side beam body 11.

[0057] The upper beam plate 12 or the lower beam plate 13 is used to abut against the vehicle body 2. In this embodiment, the upper beam plate 12 abuts against the vehicle body 2. In some embodiments, the lower beam plate 13 abuts against the vehicle body 2. The vehicle body 2 is the main structure of the vehicle. The position for fixed connection with the supporting side beam 1 can be set as a rectangular beam body, and in order to reduce the dead weight of the vehicle body 2, the interior thereof is hollowed out.

[0058] Reference Figure 3, the bolt assembly 3 can pass through the upper beam plate 12, the lower beam plate 13 and the vehicle body 2 to fix the support side beam 1 to the vehicle body 2. The bolt assembly 3 can include a pair of vehicle fixing bolts 31 and vehicle fixing nuts 32 that cooperate with each other, wherein the vehicle fixing bolts 31 pass through the lower beam plate 13, the upper beam plate 12 and the vehicle body 2 in sequence, and are threadedly connected with the vehicle fixing nuts 32. When the support side beam 1 and the vehicle body 2 are locked and fixed by the bolt assembly 3, the vehicle fixing nut 32 abuts against the side of the vehicle body 2 away from the upper beam plate 12, and the head of the vehicle fixing nut 32 abuts against the side of the lower beam plate 13 away from the upper beam plate 12. In some embodiments, the setting directions of the vehicle fixing bolts 31 and the vehicle fixing nuts 32 can be interchanged. Multiple groups of bolt assemblies 3 can be arranged at intervals along the extension direction of the support side beam 1.

[0059] The support assembly 4 is disposed between the upper beam plate 12 and the lower beam plate 13, and is used to support the upper beam plate 12 and the lower beam plate 13. When the bolt assembly 3 compresses the upper beam plate 12 and the lower beam plate 13, the upper beam plate 12 and the lower beam plate 13 are not easily deformed due to excessive pressure due to the support of the support assembly 4, so that the bolt assembly 3 can stably lock and fix the supporting side beam 1 and the vehicle body 2, thereby ensuring the stability of the battery pack on the vehicle body.

[0060] Specifically, the height of the support assembly 4 is adjustable. During actual assembly, the support assembly 4 can be placed at an appropriate position between the upper beam plate 12 and the lower beam plate 13, and then the height of the support assembly 4 can be adjusted to make the assembly process simpler and achieve the purpose of absorbing the processing tolerances of the support side beam 1 and the support assembly 4. At the same time, the supporting strength of the support assembly 4 to the upper beam plate 12 and the lower beam plate 13 can be adjusted.

[0061] Reference Figure 3 and Figure 5 In this embodiment, the support assembly 4 may include a sleeve member 41 and a washer member 42. The sleeve member 41 may be set to a hollow structure. The upper and lower ends of the sleeve member 41 are open. The sleeve member 41 is sleeved on the bolt assembly 3. Specifically, the sleeve member 41 is sleeved on the vehicle fixing bolt 31 in the bolt assembly 3. One end of the sleeve member 41 abuts against one of the upper beam plate 12 and the lower beam plate 13. Preferably, a sleeve boss 411 may be provided at one end of the sleeve member 41 away from the washer member 42. The sleeve boss 411 abuts against the upper beam plate 12 or the lower beam plate 13. The sleeve boss 411 is formed by the outer side wall of the sleeve member 41 extending in a direction away from the axis of the sleeve boss 41. The washer 42 is sleeved on the other end of the sleeve 41 , ie, the end of the sleeve 41 away from the sleeve boss 411 , and the washer 42 abuts against the other of the upper beam plate 12 and the lower beam plate 13 .

[0062] In this embodiment, the sleeve boss 411 abuts against the lower beam plate 13, the washer 42 abuts against the upper beam plate 12, and the abutting surfaces of the sleeve boss 411 and the washer 42 are both set to be planes. In some embodiments, the sleeve boss 411 may abut against the upper beam plate 12, and the washer 42 may abut against the lower beam plate 13.

[0063] Reference Figure 3 and Figure 5 The sleeve member 41 is threadedly connected with the washer member 42 to adjust the height of the support assembly 4. Specifically, the outer wall of the sleeve member 41 is threadedly connected with the inner wall of the washer member 42. The thread used for the threaded connection can be left-handed or right-handed. The latter is used in this embodiment. By adjusting the depth of the threaded connection between the sleeve member 41 and the washer member 42, the height of the support assembly 4 can be adjusted.

[0064] In some embodiments, the sleeve member 41 and the washer member 42 can be connected in a sliding and plug-in manner. By adjusting the depth of the plug-in fit between the sleeve member 41 and the washer member 42, the height of the support assembly 4 can also be adjusted. After adjustment, the sleeve member 41 and the washer member 42 can be axially limited by a locking member. The locking member can be an abutment screw that is threadedly connected to the side wall of the washer member 42 and passes through the side wall of the washer member 42 to abut against the outer wall of the sleeve member 41.

[0065] Reference Figure 3 and Figure 6 A stiffening plate 14 is provided between the upper beam plate 12 and the lower beam plate 13. The stiffening plate 14 is a rectangular plate vertically fixed between the upper beam plate 12 and the lower beam plate 13. The stiffening plate 14 can strengthen the compressive strength of the upper beam plate 12 and the lower beam plate 13 to a certain extent, so as to further prevent the upper beam plate 12 and the lower beam plate 13 from abnormal deformation due to excessive pressure. In this embodiment, the stiffening plate 14 is provided at the place where the vehicle fixing bolts 31 are inserted in the upper beam plate 12 and the lower beam plate 13, so a limited notch 141 is provided on the stiffening plate 14, and the vehicle fixing bolts 31 pass through the limited notch 141.

[0066] Reference Figure 6 and Figure 7 The washer 42 is disposed in the limiting notch 141 and abuts against the stiffening plate 14 to form a rotation limit. Specifically, the washer 42 is provided with limiting platforms 421 on both sides of the stiffening plate 14 in the thickness direction, one of the two limiting platforms 421 abuts against one side of the stiffening plate 14 in the thickness direction, and the other of the two limiting platforms 421 abuts against the other side of the stiffening plate 14 in the thickness direction, so that a rotation limit is formed between the washer 42 and the stiffening plate 14.

[0067] Reference Figure 5 and Figure 7In this embodiment, the washer 42 is set to be annular, the inner contour of the limit platform 421 is the outer contour of the washer 42, the outer contour of the limit platform 421 is composed of an arc on the offset circle of the outer circle where the outer contour of the washer 42 is located, and the inner contour and the outer contour of the limit platform 421 are connected by a straight line segment, and the rectangular plane where the straight line segment is located is used to abut against the side wall surface of the stiffening plate 14. The two limit platforms 421 are centrally symmetrically arranged along the axis of the washer 42, that is, the outer circles where the outer contours of the two limit platforms 421 are located are offset relative to the outer circle where the outer contour of the washer 42 is located in opposite directions.

[0068] In some embodiments, the shape of the limiting platform 421 can be set to be rectangular, semicircular or triangular, etc., and any shape that allows the limiting platform 421 to form a surface-to-surface contact with the stiffening plate 14 so that the limiting platform 421 and the stiffening plate 14 are firmly abutted can be used. At the same time, in some embodiments, the limiting platform 421 can also be symmetrically arranged along the axis of the thickness direction of the stiffening plate 14. In this case, a slot for the stiffening plate 14 to extend into is formed between the two limiting platforms 421. When the stiffening plate 14 is extended into the slot, a rotation limit can be formed between the gasket member 42 and the stiffening plate 14.

[0069] Reference Figure 3 and Figure 7 When a rotation limit is formed between the washer member 42 and the stiffening plate 14, the depth of the threaded connection between the sleeve member 41 and the washer member 42 can be adjusted by driving the sleeve member 41 to rotate, so as to achieve the purpose of adjusting the height of the support assembly 4, and the assembly process is more convenient.

[0070] In order to more conveniently drive the sleeve member 41 to rotate, the inner side wall of the sleeve member 41 is set to a polygonal shape, so as to facilitate connection with the disassembly tool. For example, if the inner side wall of the sleeve member 41 is set to a regular hexagon, the disassembly tool can be a hexagonal wrench, and the sleeve member 41 can be conveniently driven to rotate by inserting the disassembly tool into the sleeve member 41.

[0071] In some embodiments, the outer side wall of the sleeve boss 411 may also be set to a polygonal shape to facilitate connection with a disassembly tool. For example, the outer side wall of the sleeve boss 411 is set to a regular hexagon, and the disassembly tool may be a flat wrench or a box spanner. Of course, in some embodiments, the inner side wall of the sleeve member 41 and the outer side wall of the sleeve boss 411 may also be set to a polygonal shape at the same time.

[0072] Reference Figure 3 and Figure 6, an outer beam plate 15 may be arranged between the upper beam plate 12 and the lower beam plate 13. The outer beam plate 15 may also be a rectangular plate vertically fixed on the upper beam plate 12 and the lower beam plate 13, and the outer beam plate 15 is arranged on the side of the stiffening plate 14 away from the side beam body 11. In order to prevent the placement of the support assembly 4 between the upper beam plate 12 and the lower beam plate 13 from being affected, a window 151 for the support assembly 4 to pass through is arranged on the outer beam plate 15. The shape of the window 151 may be set to be rectangular, and its height may be equal to the distance between the upper beam plate 12 and the lower beam plate 13. The outer beam plate 15 can further enhance the compressive strength of the upper beam plate 12 and the lower beam plate 13, and prevent the support assembly 4 from being directly exposed to a position that is easily touched, thereby preventing the sleeve member 41 from rotating due to abnormal interference and changing the height of the adjusted support assembly 4.

[0073] A side beam inclined plate 16 may be provided between the lower beam plate 13 and the side beam body 11. The side beam inclined plate 16 may also be provided in a rectangular shape, and the side beam inclined plate 16 is provided obliquely between the side of the lower beam plate 13 away from the side beam body 11 and the lower side of the side beam body 11. In order to prevent the penetration of the bolts on the lower beam plate 13, the sleeve member 41 and the upper beam plate 12 from being affected, a through hole 161 for the bolt assembly 3 to pass through is provided on the side beam inclined plate 16, and the through hole 161 may be provided in an elliptical shape. The side beam inclined plate 16 enhances the connection strength between the lower beam plate 13 and the side beam body 11, and constitutes a bracing structure between the two. When the lower beam plate 13 tends to deform in a direction close to the upper beam plate 12, the side beam inclined plate 16 can exert a pulling effect on the lower beam plate 13 to offset its deformation tendency; when the lower beam plate 13 tends to deform in a direction away from the upper beam plate 12, the side beam inclined plate 16 can exert a supporting effect on the lower beam plate 13 to offset its deformation tendency. Therefore, the side beam inclined plate 16 can improve the structural strength and deformation resistance of the lower beam plate 13.

[0074] The support structure disclosed in the present application has a split structure of the support side beam 1 and the support assembly 4. The vehicle body 2 and the vehicle fixing bolts 31 directly compress the support side beam 1, and the axial preload force of the bolt assembly 3 is completely converted into a positive pressure on the support side beam 1. The positive pressure can be designed and checked in the early design stage, and can be monitored and tested in the process assembly stage, thereby avoiding the positive pressure acting on the support side beam 1 being too small, resulting in the support side beam 1 and the vehicle body 2 being not firmly fixed, or the positive pressure acting on the support side beam 1 being too large, resulting in abnormal deformation of the support side beam 1.

[0075] Furthermore, the height of the support assembly 4 can be adjusted by adjusting the depth of the threaded connection between the sleeve member 41 and the washer member 42, so as to absorb the processing tolerance of the support side beam 1 and the support assembly 4. Even when the processing tolerance of the distance dimension between the upper beam plate 12 and the lower beam plate 13 or the height dimension of the support assembly 4 is large, the support assembly 4 can still effectively support the upper beam plate 12 and the lower beam plate 13 and prevent them from abnormal deformation. At the same time, it is also convenient to apply torque to the bolt assembly 3 to the design value to ensure that the forces at different positions of the support side beam 1 are basically the same. Therefore, in the actual production process, the processing tolerance requirements of the distance dimension between the upper beam plate 12 and the lower beam plate 13 and the height dimension of the support assembly 4 can be relaxed, and the manufacturability of the two can be improved.

[0076] At the same time, the support component 4 is connected to the support side beam 1 by being supported and fixed between the upper beam plate 12 and the lower beam plate 13, thereby avoiding the inconvenience caused by the welding processing technology, and there is no special requirement for the material of the support component 4. The material can be steel or other materials with greater rigidity than aluminum, and there is no need to consider the influence of welding deformation and welding strength on the reliability of the connection between the support side beam 1 and the support component 4.

[0077] To sum up, the support structure disclosed in the present application realizes the reinforcement of the rigidity of the support side beam 1 through the support assembly 4, without considering the distribution of the force between the support assembly 4 and the support side beam 1, so that the preload force provided by the bolt assembly 3 acts entirely on the support side beam 1, and the positive pressure acting on the support side beam 1 is truly known and designable in the early design stage, and can be tested and monitored in the later assembly stage, thereby ensuring the stability of the battery pack on the vehicle body while avoiding abnormal deformation of the support side beam 1 due to excessive pressure.

[0078] The present application also discloses a method for assembling a support structure, which comprises:

[0079] S1. The support assembly 4 is formed, specifically, the sleeve member 41 and the washer member 42 are first formed, and then the washer member 42 is threadedly connected to the sleeve member 41 away from the end of the sleeve 5 to form the support assembly 4;

[0080] S2. The support assembly 4 is arranged between the upper beam plate 12 and the lower beam plate 13. Specifically, the depth of the threaded connection between the sleeve member 41 and the washer member 42 is adjusted first, so that the height of the support assembly 4 is smaller than the distance between the upper beam plate 12 and the lower beam plate 13. Then, the support assembly 4 is placed at the limiting notch 141 through the window 151, and one limiting platform 421 is abutted against one side of the stiffening plate 14, and the other limiting platform 421 is abutted against the other side of the stiffening plate 14, so as to form a rotation limit.

[0081] S3. Adjust the height of the support assembly 4 so that the support assembly 4 supports the upper beam plate 12 and the lower beam plate 13, and apply torque to the first design value. Specifically, drive the sleeve member 41 to rotate by the disassembly tool to increase the height of the support assembly 4 until the washer member 42 abuts against the upper beam plate 12, and the sleeve boss 411 abuts against the lower beam plate 13, so as to achieve the fixation of the support assembly 4 between the upper beam plate 12 and the lower beam plate 13, and then apply torque to the support assembly 4 to the first design value by a torque application tool such as a torque wrench. The first design value is used to ensure the stability of the support assembly 4;

[0082] S4. Connect the supporting side beam 1 with the vehicle body 2, and set the bolt assembly 3 on the supporting side beam 1 and the vehicle body 2, so that the bolt assembly 3 locks and fixes the supporting side beam 1 and the vehicle body 2. Specifically, the upper beam plate 12 is abutted against the lower side of the vehicle body 2, and then the vehicle fixing bolt 31 in the bolt assembly 3 is passed through the lower beam plate 13, the supporting assembly 4, the upper beam plate 12 and the vehicle body 2 in sequence, and then the vehicle fixing nut 32 is threadedly connected with the vehicle fixing bolt 31;

[0083] S5. Apply torque to the bolt assembly 3 to a second design value. Specifically, tighten the vehicle fixing bolt 31 or the vehicle fixing nut 32 so that the bolt assembly 3 locks and fixes the supporting side beam 1 and the vehicle body 2. Then, apply torque to the bolt assembly 3 to a second design value using a torque applying tool such as a torque wrench. The second design value is used to ensure the positive pressure acting on the supporting side beam 1.

[0084] An embodiment of the present application also discloses a battery pack, which includes a battery pack body and the above-mentioned support structure, wherein the support structure is disposed on the battery pack body and is used to fix the battery pack body to the vehicle body.

[0085] The embodiment of the present application also discloses a car, which includes a car body, a battery pack and the above-mentioned support structure, and the support structure fixes the battery pack to the car body.

[0086] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A support structure for fixing a battery pack to a vehicle body, characterized in that: include: A supporting side beam (1), the supporting side beam comprising a side beam body (11), an upper beam plate (12) and a lower beam plate (13), the side beam body (11) being used for being fixedly connected to the battery pack, the upper beam plate (12) being arranged on one side of the side beam body (11), the lower beam plate (13) being arranged at intervals below the upper beam plate (12), the upper beam plate (12) or the lower beam plate (13) being used for being in contact with the vehicle body (2); A bolt assembly (3) passes through the upper beam plate (12), the lower beam plate (13) and the vehicle body (2) to fix the supporting side beam (1) to the vehicle body (2); and, A support assembly (4) is arranged between the upper beam plate (12) and the lower beam plate (13), two ends of the support assembly (4) are respectively in contact with the upper beam plate (12) and the lower beam plate (13), and support is provided for the upper beam plate (12) and the lower beam plate (13), and the height of the support assembly (4) is adjustable; The support assembly (4) comprises: a sleeve member (41), wherein the sleeve member (41) is sleeved on the bolt assembly (3), and one end of the sleeve member (41) is in contact with one of the upper beam plate (12) and the lower beam plate (13); and, A washer (42) is sleeved on the other end of the sleeve (41), and the washer (42) abuts against the other of the upper beam plate (12) and the lower beam plate (13).

2. The support structure according to claim 1, characterized in that: A sleeve boss (411) is provided at one end of the sleeve member (41) away from the washer member (42), and the sleeve boss (411) abuts against the upper beam plate (12) or the lower beam plate (13).

3. The support structure according to claim 2, characterized in that: The sleeve member (41) is threadedly connected to the washer member (42) to adjust the height of the support assembly (4).

4. The support structure according to claim 3, characterized in that: A stiffening plate (14) is arranged between the upper beam plate (12) and the lower beam plate (13), a limiting notch (141) is arranged on the stiffening plate (14), and the washer (42) is arranged in the limiting notch (141) and abuts against the stiffening plate (14) to form a rotation limit.

5. The support structure according to claim 4, characterized in that: The washer member (42) is provided with limiting platforms (421) on both sides along the thickness direction of the stiffening plate (14); one of the two limiting platforms (421) abuts against one side of the stiffening plate (14) in the thickness direction, and the other of the two limiting platforms (421) abuts against the other side of the stiffening plate (14) in the thickness direction.

6. The support structure according to claim 2, characterized in that: The inner side wall of the sleeve member (41) is configured as a polygon, and / or the outer side wall of the sleeve boss (411) is configured as a polygon, so as to facilitate connection with a disassembly tool.

7. The support structure according to claim 4, characterized in that: An outer beam plate (15) is provided between the upper beam plate (12) and the lower beam plate (13), the outer beam plate (15) being provided on a side of the stiffening plate (14) away from the side beam body (11), and a window (151) for the support assembly (4) to pass through is provided on the outer beam plate (15); and / or A side beam inclined plate (16) is provided between the lower beam plate (13) and the side beam body (11), and a through hole (161) for the bolt assembly (3) to pass through is provided on the side beam inclined plate (16).

8. A method for assembling a support structure according to any one of claims 1 to 7, characterized in that: include: Processing the support component (4) into shape; The support assembly (4) is arranged between the upper beam plate (12) and the lower beam plate (13); Adjusting the height of the support assembly (4) so ​​that the support assembly (4) supports the upper beam plate (12) and the lower beam plate (13) and applies a torque to a first design value; The side beam (1) is connected to the vehicle body (2), and the bolt assembly (3) is passed through the upper beam plate (12), the lower beam plate (13) and the vehicle body (2) to fix the supporting side beam (1) to the vehicle body (2); A torque is applied to the bolt assembly (3) to a second design value.

9. A battery pack, characterized in that: include: Battery pack body; And the support structure according to any one of claims 1 to 7, wherein the support structure is arranged on the battery pack body and is used to fix the battery pack body to the vehicle body.

10. An automobile, characterized in that: include: Car body; Battery pack; And a support structure as described in any one of claims 1 to 7, wherein the support structure fixedly connects the battery pack to the vehicle body.

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