Battery pack mounting point structure

Abstract

The utility model provides a battery pack mounting point structure which comprises a supporting plate arranged on a box body of a battery pack and a mounting point sleeve which penetrates through the supporting plate from top to bottom and then is connected with the box body, and an energy absorption part used for absorbing stress is arranged on the supporting plate. According to the battery pack mounting point structure disclosed by the utility model, the strength of the mounting point structure can be improved by arranging the supporting plate, and meanwhile, the stress concentration can be reduced and the stress of the mounting point can be reduced by arranging the energy absorption part, so that the failure risk of the mounting point can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack mounting point structure. Background Art

[0002] At present, power batteries are generally assembled on the chassis of the whole vehicle as independent parts, so a mounting support structure is required in the middle area of ​​the battery. The mounting point in the middle of the battery pack not only has the function of locking the battery installation to the chassis of the whole vehicle, but also needs to provide structural support for the middle area of ​​the battery cover inside the battery to improve the stiffness and mode of the battery cover.

[0003] The existing mounting point structure may be subjected to vibration and impact during vehicle driving. Due to the insufficient strength between the middle mounting point and the crossbeam connected thereto, stress concentration may cause cracking at the connection between the middle mounting point and the crossbeam, causing the mounting point structure to fail. Utility Model Content

[0004] In view of this, the utility model aims to propose a battery pack mounting point structure to improve the structural strength of the mounting point and reduce the risk of structural failure of the mounting point.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A battery pack mounting point structure comprises a support plate arranged on a box body of the battery pack, and a mounting point sleeve penetrating the support plate from top to bottom and connected to the box body, wherein the support plate is provided with an energy absorbing part for absorbing stress.

[0007] Furthermore, it also includes a fastener; the box body is provided with an upper cover supported on the top of the mounting point sleeve, and the fastener penetrates the upper cover from top to bottom and is screwed into the inner hole of the mounting point sleeve.

[0008] Furthermore, the box body has an installation cavity for installing the battery cell module, and a middle crossbeam arranged in the installation cavity, and the support plate and the mounting point sleeve are both arranged on the middle crossbeam in the installation cavity.

[0009] Furthermore, the mounting point sleeve includes an upper supporting portion for supporting the upper cover, and a lower connecting portion for connecting with the supporting plate and the middle cross beam, and a groove for placing a seal is provided on the top of the upper supporting portion.

[0010] Furthermore, the lower connecting portion is cylindrical, and the cross-section of the support plate is elliptical; the center of the cross-section of the lower connecting portion coincides with the center of the cross-section of the support plate, and / or the major axis extension direction of the cross-section of the support plate is the same as the length direction of the middle crossbeam.

[0011] Furthermore, the energy absorbing portion includes energy absorbing grooves disposed on both sides of the mounting point sleeve.

[0012] Furthermore, each of the energy absorption grooves is arranged on the periphery of the support plate, and each of the energy absorption grooves is a semicircular hole.

[0013] Furthermore, the radius of each of the energy absorption grooves is equal to 3 times the wall thickness of the middle cross beam; and / or, in the extension direction of the middle cross beam, the spacing between each of the energy absorption grooves and the center of the cross section of the support plate is the same as the outer diameter of the lower connecting part.

[0014] Furthermore, each of the energy absorbing grooves is a long hole extending along the length direction of the middle cross beam.

[0015] Furthermore, the thickness of the support plate is between 5-10 mm; and / or the major axis of the cross section of the support plate is equal to 4 times the outer diameter of the lower connecting portion, and the minor axis of the cross section of the support plate is the same as the outer diameter of the lower connecting portion.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The battery pack mounting point structure described in the utility model can improve the structural strength of the mounting point by providing a support plate. At the same time, the provision of the energy-absorbing part can also absorb and eliminate the stress borne by the mounting point, reduce stress concentration, and reduce the force on the mounting point, thereby helping to reduce the risk of failure of the mounting point.

[0018] Secondly, by screwing the fasteners into the inner hole of the mounting point sleeve, the screw connection can be used to improve the overall structural stability and mounting stability of the battery pack, which is simple, convenient and has high connection strength. The support plate and the mounting point sleeve are both arranged on the middle crossbeam, which is conducive to improving the stability of the middle mounting of the battery pack, and the structure is simple and compact, saving internal space of the battery pack. The setting of the upper support part can provide structural support for the upper cover of the battery pack and improve the rigidity of the upper cover of the battery pack. At the same time, the setting of the groove makes it easy to place the seal to improve the sealing effect of the entire package.

[0019] Furthermore, the center of the cross section of the lower connection part coincides with the center of the cross section of the support plate, which is conducive to ensuring the connection area and connection strength between the lower connection part and the support plate. The major axis extension direction of the cross section of the support plate is the same as the length direction of the middle cross beam, which can increase the connection area between the support plate and the middle cross beam, improve the connection strength, and thus reduce the risk of cracking. The setting of the energy absorption groove can make the stress dispersed on the support plate and then be absorbed or dissipated, which can avoid stress concentration on the one hand and quickly eliminate the dispersed stress on the other hand.

[0020] Furthermore, the energy absorption grooves are arranged as semicircular holes, each of which is arranged at the periphery of the support plate, or the energy absorption grooves are arranged as long holes extending along the length direction of the middle cross beam, which can achieve the effect of dispersing stress in multiple places. This is beneficial to improving the stress dispersion and absorption effect of the mounting point with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the battery pack mounting point structure according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Enlarged view in the middle;

[0024] Figure 3 It is a partial schematic diagram of the battery pack mounting point structure according to an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 a top view of the structure shown;

[0026] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0027] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0028] Figure 7 for Figure 4 a front view of the structure shown;

[0029] Figure 8 for Figure 7 The enlarged view of point D in the middle;

[0030] Fig. 9 This is a structural schematic diagram of the semicircular hole energy absorption groove described in an embodiment of the utility model;

[0031] Fig.10 for Fig. 9 Sectional view along EE direction;

[0032] Fig.11 This is a schematic diagram of the structure of the long hole energy absorption groove described in the embodiment of the utility model;

[0033] Fig.12 for Fig.11 Sectional view along the FF axis;

[0034] Description of reference numerals:

[0035] 1. Box body; 11. Installation cavity; 12. Bottom plate; 13. Middle cross beam; 131. Top wall; 132. Side wall; 14. Middle longitudinal beam; 15. Right beam; 16. Left beam; 17. Rear beam; 18. Front beam;

[0036] 2. Support plate; 3. Energy absorbing part; 31. Energy absorbing groove; 311. Semicircular hole; 312. Long hole;

[0037] 4. Mounting point sleeve; 41. Upper support portion; 411. Groove; 42. Lower connecting portion;

[0038] 51. inner hole; 52. drilling hole;

[0039] 6. Reserved section; 7. Chamfered corner;

[0040] t, the wall thickness of the middle crossbeam; t1, the thickness of the support plate; H, the overall height of the battery pack; G, the size of the reserved section;

[0041] R, radius of the semicircular hole; R1, radius of the long hole; R2, radius of the chamfer;

[0042] X, width of the middle beam; X1, plane width of the middle beam;

[0043] D1, the inner diameter of the mounting point sleeve; D2, the outer diameter of the mounting point sleeve;

[0044] L, the distance between the center of each semicircular hole and the center of the cross section of the support plate; L2, the distance between the center of each long hole near the end of the mounting point sleeve and the center of the cross section of the support plate;

[0045] Y, the major axis dimension of the support plate; Y1, the minor axis dimension of the support plate; Y2, the length dimension of the long hole. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0047] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] The battery pack mounting point structure described in the present invention is located Figure 1 As an example of the battery pack shown in the figure, the directional words used in the embodiment, such as "up, down, left, right, front, back" are based on Figure 1 The up-down direction (also called height direction, or Z direction of the whole package), left-right direction (also called width direction, or Y direction of the whole package), and front-back direction (also called length direction, or X direction of the whole package) in the state shown are defined as references. "Inside" and "outside" are defined based on the contour of the corresponding component. For example, "inside" and "outside" are defined based on the contour of the battery pack, and the side where the middle crossbeam is located is "inside", and the opposite side is "outside".

[0049] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] Embodiment 1

[0052] The present embodiment relates to a battery pack mounting point structure, which is beneficial to improving the strength of the mounting point structure and reducing the failure risk of the mounting point structure.

[0053] In terms of overall structure, Figure 1 As shown, the battery pack mounting point structure of this embodiment includes a support plate 2 arranged on the box body 1 of the battery pack, and a mounting point sleeve 4 that penetrates the support plate 2 from top to bottom and is connected to the box body 1, and an energy absorbing portion 3 for absorbing stress is provided on the support plate 2.

[0054] Here, by providing the support plate 2, the strength of the mounting point structure can be improved. At the same time, the provision of the energy absorbing part 3 can also reduce stress concentration and reduce the force on the mounting point, thereby helping to reduce the failure risk of the mounting point structure.

[0055] It is worth mentioning that the battery pack of this embodiment is mounted on the chassis or floor of the vehicle during its specific implementation, and the battery pack mounting point structure of this embodiment is preferably a related structure for mounting the battery pack on a vehicle.

[0056] Meanwhile, the related structural parts not mentioned in this embodiment can refer to the various structures of battery pack products well known to those skilled in the art, such as Figure 1As shown, the box body 1 includes a bottom plate 12, a front side beam 18 arranged on the bottom plate 12, a rear side beam 17 arranged on the bottom plate 12 and arranged front and rearwardly opposite to the front side beam 18, a left side beam 16 and a right side beam 15 connected between the front side beam 18 and the rear side beam 17, and a middle longitudinal beam 14 arranged on the bottom plate 12.

[0057] Based on the above overall introduction, in this embodiment, as a preferred implementation form, Figure 4 As shown, it also includes a fastener. The box body 1 is provided with an upper cover supported on the top of the mounting point sleeve 4. The fastener passes through the upper cover from top to bottom and is screwed into the inner hole 51 of the mounting point sleeve 4.

[0058] Here, the inner hole 51 is set as a threaded hole, and the fastener is screwed into the inner hole 51 of the mounting point sleeve. The screw connection can be used to improve the overall structural stability and mounting stability of the battery pack due to its simplicity, convenience and high connection strength.

[0059] In addition, in this embodiment, as a preferred embodiment, Figure 1 As shown, the box body 1 has an installation cavity 11 for installing the battery module, and a middle cross beam 13 arranged in the installation cavity 11, and the support plate 2 and the mounting point sleeve 4 are both arranged on the middle cross beam 13 in the installation cavity 11. The support plate 2 and the mounting point sleeve 4 are both arranged on the middle cross beam 13, which has a simple and compact structure and saves the internal space of the battery pack.

[0060] It is still worth mentioning that the middle crossbeam 13 of this embodiment includes two side walls 132 arranged opposite to each other, and a top wall 131 provided on the top of the two side walls 132 , and the bottom of the mounting point sleeve 4 penetrates the support plate 2 from top to bottom and then extends under the top wall 131 .

[0061] In a specific implementation, the installation cavity 11 is formed in the area surrounded by the bottom plate 12 and each side beam, and the two ends of the middle cross beam 13 are respectively connected to the front side beam 15 and the rear side beam 16. In addition, the support plate 2 and the mounting point sleeve 4, and the mounting point sleeve 4 and the middle cross beam 13 can be connected by welding.

[0062] Furthermore, in this embodiment, as a preferred implementation form, Figure 5 and Figure 7 As shown, the mounting point sleeve 4 includes an upper support portion 41 for supporting the upper cover, and a lower connection portion 42 for connecting with the support plate 2 and the middle cross beam 13, and a groove 411 for placing a seal is provided at the top of the upper support portion 41.

[0063] Here, the upper support portion 41 can provide structural support to the upper cover of the battery pack, thereby improving the rigidity of the upper cover of the battery pack. At the same time, by providing the groove 411, it is convenient to place the seal to improve the sealing effect of the entire pack.

[0064] Specifically, the upper support portion 1 of this embodiment is arranged with a reduced cross-sectional profile from top to bottom, and the sealing member of this embodiment can be a sealing ring, and is arranged in a groove 411 at the top of the upper support portion 41, and the sealing ring is used to form a seal between the upper support portion 41 and the upper cover.

[0065] At the same time, in this embodiment, as a preferred implementation form, Figure 5 and Figure 7 As shown, the lower connecting portion 42 is cylindrical, the cross section of the support plate 2 is elliptical, and the center of the cross section of the lower connecting portion 42 coincides with the center of the cross section of the support plate 2. Thus, it is helpful to ensure the connection area and connection strength between the lower connecting portion 42 and the support plate 2.

[0066] At the same time, the major axis of the cross section of the support plate 2 extends in the same direction as the length of the middle beam 13. This arrangement has the advantage of increasing the connection area between the support plate 2 and the middle beam 13, thereby increasing the connection strength and reducing the risk of cracking.

[0067] In addition, in this embodiment, as a preferred implementation form, Figures 3 to 5 As shown, the energy absorbing part 3 includes energy absorbing grooves 31 disposed on both sides of the mounting point sleeve 4. Such a configuration can disperse the stress on the support plate 2 and then absorb or eliminate it, which can avoid stress concentration on the one hand and help to quickly eliminate the dispersed stress on the other hand.

[0068] In detail, in this embodiment, as a preferred implementation form, Figure 5 As shown, each energy absorbing groove 31 is arranged on the periphery of the support plate 2, and each energy absorbing groove 31 is a semicircular hole 311. Thus, the effect of dispersing stress at multiple locations can be achieved, which is conducive to dispersing and absorbing stress with a simple structure.

[0069] In specific implementation, the number of the semicircular holes 311 can be set and adjusted according to the actual stress absorption capability, for example, it can be set to four, as long as it is able to absorb the dispersed stress and ensure the strength of the mounting point structure.

[0070] In this embodiment, as a preferred implementation form, Fig. 9 and Fig.10 As shown, the radius R of each energy absorption groove 31 is equal to 3 times the wall thickness t of the middle cross beam 13. Here, the radius R of the semicircular hole 311 can better absorb the stress generated by the mounting point structure during daily use, which is conducive to ensuring the strength of the mounting point.

[0071] Furthermore, in the extension direction of the middle cross beam 13, the spacing dimension L between each energy absorbing groove 31 and the center of the cross section of the support plate 2 is the same as the outer diameter dimension D2 of the lower connecting portion 42. Thus, a relatively good stress absorption effect can be achieved while facilitating the arrangement of each energy absorbing groove 31.

[0072] In specific implementation, the wall thickness t of the middle cross beam 13 can be set between 1 and 2 mm, thereby ensuring the structural strength of the mounting point while making the device as a whole lighter, thereby ensuring a balance between strength and lightness. The specific value can be set and adjusted accordingly according to actual needs, such as 1 mm or 2 mm.

[0073] Based on this, the radius R of each semicircular hole 311 can be 3 mm or 6 mm, so as to achieve better stress absorption and elimination effects without excessively weakening the structural strength of the support plate 2.

[0074] It is worth mentioning that the radius R of each energy absorption groove 31 can also be set to 2 times or 4 times the wall thickness t of the middle cross beam 13, as long as it can fully disperse the stress and then absorb it, thereby ensuring the strength of the mounting point.

[0075] In addition, the outer diameter D2 of the lower connecting portion 42 can be set to 35 mm, thereby ensuring the wall thickness of the middle cross beam 13 and thus ensuring the strength of the mounting point. Moreover, the relationship between the outer diameter D2 of the lower connecting portion 42 and the plane width X1 and the inner diameter D1 of the middle cross beam 13 is 0.9*X1≤D2≤1.3*D1, so the outer diameter D2 of the lower connecting portion 42 can also be set according to the specific values ​​of X1 and D1.

[0076] Furthermore, the inner diameter D1 of the lower connecting portion 42 of the present embodiment can be set to 16 mm or 18 mm, which is beneficial to improve the connection stability between the fastener and the mounting point structure, thereby ensuring the overall fixing effect of the battery pack.

[0077] Secondly, in this embodiment, the width X of the middle cross beam 13 can be set to 54 mm, which is conducive to enhancing the structural strength of the middle cross beam 13, thereby enhancing the structural strength of the battery pack as a whole. At the same time, the width X of the middle cross beam 13 can also be set to 56 mm or 52 mm according to the overall height H of the battery pack.

[0078] Based on the width X of the middle cross beam 13, the plane width X1 of the middle cross beam 13 can be set to 43.2 mm, thereby ensuring the wall thickness of the middle cross beam and further ensuring the strength of the mounting point structure. The plane width X1 of the middle cross beam 13 is 0.8*X, that is, it can also be set to 44.8 mm or 41.6 mm according to the value of the width X of the middle cross beam 13 in this embodiment.

[0079] It should be noted that, in this embodiment, in order not to affect the normal driving of the vehicle, the overall height H of the battery pack can be set between 130 mm and 140 mm, thereby improving the overall lightweight while ensuring the normal operation of the vehicle.

[0080] In addition, in this embodiment, as another preferred implementation form, Fig.11 and Fig.12 As shown, each energy absorbing groove 31 is a long hole 312 extending along the length direction of the middle cross beam 13. As a result, the structure is simple, which is convenient for the overall arrangement of the structure, and the stress dispersion and stress absorption are achieved with a simple structure. Figure 1 Left-right direction as shown in .

[0081] In specific implementation, the number of the long holes 312 can be set to two, thereby achieving the effect of dispersing stress at multiple locations. In addition, during arrangement, the center of the mounting point sleeve 4 is collinear with the center line of the long hole 312 .

[0082] Among them, the radius dimension R1 of the long hole 312 is set in the range of 2mm to 3mm, thereby ensuring the structural strength of the mounting point and reducing the overall weight of the device and improving lightweight. The specific value can be set and adjusted according to actual needs, for example, it can be set to 2mm or 3mm.

[0083] In addition, in this embodiment, as a preferred implementation form, the thickness dimension t1 of the support plate 2 is between 5-10 mm, so as to achieve a better stress absorption and elimination effect without destroying the structural strength of the support plate 2.

[0084] In a specific implementation, the specific value of the thickness dimension t1 of the support plate 2 can be set to 6 mm or 8 mm according to actual needs, thereby ensuring the structural strength of the mounting point while improving the overall lightweight of the device.

[0085] Furthermore, the major axis dimension Y of the cross section of the support plate 2 is equal to 4 times the outer diameter dimension D2 of the lower connecting portion 42, which can increase the stress dispersion area and force transmission path, thereby enhancing the structural strength of the support plate 2. At the same time, the minor axis dimension Y1 of the cross section of the support plate 2 is the same as the outer diameter dimension D2 of the lower connecting portion 42, which is conducive to the assembly of the two and ensures the feasibility of the structure.

[0086] It is still worth mentioning that the major axis dimension Y of the cross section of the support plate 2 in this embodiment can also be set to 3 times or 5 times the outer diameter dimension D2 of the lower connecting portion 42, as long as it can achieve the dispersion and absorption of concentrated stress.

[0087] Here, the relationship between the length dimension Y2 of the long hole 312 and the minor axis dimension Y1 of the cross section of the support plate 2 is Y2=0.5*Y1, that is, the length dimension Y2 of the long hole 312 can be set to 17.5mm or 30mm. Thus, the long hole 312 is conducive to fully dispersing the stress and then absorbing it.

[0088] Moreover, the relationship between the center of each long hole 312 close to one end of the mounting point sleeve 4 and the spacing dimension L2 between the center of the cross section of the support plate 2 is L2=1.5*Y1, that is, L2 can be set to 52.5mm or 45mm to ensure a lightweight setting without destroying the structural strength of the mounting point.

[0089] It remains to be noted that if Figure 6 and Figure 8 As shown, a through hole 52 corresponding to the lower connecting portion 42 is provided on the middle cross beam 13 , and a reserved section 6 is provided between the straight edge of the through hole 52 and the chamfered corner 7 of the middle cross beam 13 .

[0090] In specific implementation, the size G of the reserved section 6 can be set to 4.32 mm, thereby preventing stress concentration at the chamfer 7 during use of the mounting point structure, which may lead to cracking. At the same time, it can also be set according to the relationship between the size G of the reserved section 6 and the plane width X1 of the middle cross beam 13 G=0.1*X1.

[0091] In addition, the radius R2 of the chamfer 7 can be set to 5.4 mm, which is beneficial to reduce the stress concentration at the chamfer 7 and improve the structural strength of the middle cross beam 13. Here, there is a relationship between the radius R2 of the chamfer 7 and the width X of the middle cross beam 13, R2=0.1*X, that is, it can also be set according to the width X of the middle cross beam 13.

[0092] In the specific implementation of this embodiment, the support plate 2 can be divided into two sub-plates, which are welded on both sides of the lower connecting portion 42 to improve the structural strength of the mounting point. The mounting point sleeve 4 is welded to the middle cross beam 13. At the same time, the battery pack cover is penetrated by a fastener and screwed to the mounting point sleeve 4, so that the battery pack is mounted on the vehicle body as a whole. An energy absorption groove 31 is set on the support plate 2 to disperse the concentrated stress of the mounting point, absorb the stress borne by the mounting point, and reduce the failure risk of the mounting point.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack mounting point structure, characterized in that: It includes a support plate arranged on a box body of a battery pack, and a mounting point sleeve which penetrates the support plate from top to bottom and is connected to the box body, and an energy absorbing part for absorbing stress is arranged on the support plate.

2. The battery pack mounting point structure according to claim 1, characterized in that: Also included are fasteners; The box body is provided with an upper cover supported on the top of the mounting point sleeve, and the fastener penetrates the upper cover from top to bottom and is screwed into the inner hole of the mounting point sleeve.

3. The battery pack mounting point structure according to claim 2, characterized in that: The box body has an installation cavity for installing the battery module and a middle crossbeam arranged in the installation cavity. The support plate and the mounting point sleeve are both arranged on the middle crossbeam in the installation cavity.

4. The battery pack mounting point structure according to claim 3, characterized in that: The mounting point sleeve includes an upper supporting portion for supporting the upper cover, and a lower connecting portion for connecting with the supporting plate and the middle cross beam, and a groove for placing a seal is provided on the top of the upper supporting portion.

5. The battery pack mounting point structure according to claim 4, characterized in that: The lower connecting portion is cylindrical, and the cross section of the supporting plate is elliptical; The center of the cross section of the lower connecting portion coincides with the center of the cross section of the supporting plate, and / or the major axis of the cross section of the supporting plate extends in the same direction as the length of the middle cross beam.

6. The battery pack mounting point structure according to claim 5, characterized in that: The energy absorbing part includes energy absorbing grooves respectively arranged on both sides of the mounting point sleeve.

7. The battery pack mounting point structure according to claim 6, characterized in that: Each of the energy absorbing grooves is arranged on the periphery of the support plate, and each of the energy absorbing grooves is a semicircular hole.

8. The battery pack mounting point structure according to claim 7, characterized in that: The radius of each of the energy absorbing grooves is equal to three times the wall thickness of the middle cross beam; and / or, In the extension direction of the middle cross beam, the spacing between each of the energy absorbing grooves and the center of the cross section of the support plate is the same as the outer diameter of the lower connecting portion.

9. The battery pack mounting point structure according to claim 6, characterized in that: Each of the energy absorbing grooves is in the form of a long hole extending along the length direction of the middle cross beam.

10. The battery pack mounting point structure according to any one of claims 5 to 9, characterized in that: The thickness of the support plate is between 5-10 mm; and / or, The major axis dimension of the cross section of the support plate is equal to 4 times the outer diameter dimension of the lower connecting portion, and the minor axis dimension of the cross section of the support plate is the same as the outer diameter dimension of the lower connecting portion.

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