Insert block, battery pack middle fixing point device and vehicle

Abstract

An insert block (5), which is of a T-shaped hollow structure and comprises a first sub-block (50) and a second sub-block (51) connected to each other, the outer diameter of the second sub-block (51) being greater than the outer diameter of the first sub-block (50). The first sub-block (50) being provided with a mounting hole (53); the insert block (5) is arranged in an embedding hole (20) of a battery upper cover (2); a connecting member (4) of a vehicle body longitudinal beam (1) is connected to the mounting hole (53). The structure avoids the connecting member passing through a battery pack from the bottom of the battery pack, thus reducing the space needing to be reserved for providing a mounting point for the battery pack, increasing the space utilization rate, and reducing the difficulty in sealing at the mounting point for the battery pack. Further disclosed are a battery pack middle fixing point device and a vehicle.

Description

A plug, a battery pack middle fixing point device and a vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on March 28, 2024, with application number 202410370697.5 and application name “A battery pack middle fixing point device and vehicle”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of power battery technology, and in particular to a plug, a battery pack middle fixing point device and a vehicle. Background Art

[0004] The power battery of a new energy vehicle is mounted on the entire vehicle. In addition to the fixed points on all sides, additional fixed points will be added in the middle to improve the mode of the battery pack and increase battery reliability.

[0005] In the prior art, if a mounting point is provided in the middle of the power battery, the middle reinforcement beam is usually wider, and the bolts are passed through the bottom of the battery pack to fix it. A large space needs to be reserved, and the space utilization rate is low. At the same time, the path where the bolts pass through the battery pack in the above-mentioned setting method needs to be sealed throughout, which makes it difficult to seal the battery pack at the mounting point. Summary of the Invention

[0006] The purpose of the present application is to provide a plug, a battery pack middle fixing point device and a vehicle, which avoids the connection part passing through the battery pack from the bottom of the battery pack, reduces the space required to set the mounting point of the battery pack, increases the utilization rate of the space, and reduces the difficulty of sealing the battery pack at the mounting point.

[0007] The technical solution of the present application provides a plug block, which has a T-shaped hollow structure and includes a first block and a second block connected to each other. The outer diameter of the second block is larger than the outer diameter of the first block, and the first block is provided with a mounting hole; the plug block is arranged in the embedding hole of the first component; and the connecting piece of the second component is connected to the mounting hole.

[0008] In some embodiments, the first block is also provided with a weight-reducing portion, which is hollow and has first reinforcing ribs arranged in an intersecting manner; the interior of the second block is hollow and has second reinforcing ribs, which are supported in the second block along the first direction or in a direction at a certain acute angle to the first direction.

[0009] In some embodiments, the second block and the first block define a positioning step at the junction.

[0010] In some embodiments, the mounting holes are threaded holes.

[0011] The technical solution of the present application provides a middle fixing point device of a battery pack, comprising: a plug block of any of the above-mentioned embodiments, a vehicle body cross beam, a battery cover and a battery longitudinal beam arranged in sequence along a first direction; an embedding hole is provided in the battery longitudinal beam, the plug block is connected to the battery longitudinal beam and partially arranged in the embedding hole, and the remaining part of the plug block protrudes from the outer surface of the battery longitudinal beam; a second mounting hole is provided in the battery cover; a connecting piece connected to the vehicle body cross beam is limited in the mounting hole of the plug block after passing through the second mounting hole, and the mounting hole is arranged along the first direction and serves as the third mounting hole in the battery longitudinal beam; an upper cover insert is also installed in the second mounting hole of the battery cover, the connecting piece is located in the upper cover insert, and the upper cover insert is partially sealed and abutted between the plug block and the battery cover; an annular vehicle body sealing ring is sealed between the vehicle body cross beam and the battery cover, and the connecting piece is located in the vehicle body sealing ring.

[0012] In some embodiments, the embedding hole includes a first sub-hole and a second sub-hole that are connected to each other, the first sub-hole is located between the battery cover and the second sub-hole, the inner diameter of the second sub-hole is larger than the inner diameter of the first sub-hole, and the second sub-hole and the second sub-hole define an embedding step at the intersection; the plug includes a first block and a second block that are connected, the first block is embedded in the first sub-hole, the second block is embedded in the second sub-hole, the outer diameter of the second block is larger than the outer diameter of the first block, and the second block and the first block define a positioning step at the intersection; the embedding step fits on the positioning step.

[0013] In some embodiments, the first block is provided with a third mounting hole and a weight-reducing portion along the first direction, and the weight-reducing portion is hollow and provided with first reinforcing ribs arranged in an intersecting manner; the interior of the second block is hollow and provided with second reinforcing ribs, and the second reinforcing ribs are supported in the second block along the first direction or in a direction at a certain acute angle to the first direction.

[0014] In some embodiments, a first mounting hole is provided on the vehicle body cross beam, and a welding nut is also provided on the vehicle body cross beam. The threaded hole of the welding nut is aligned with the first mounting hole. The connecting piece is a double-headed stud, and the third mounting hole is a threaded hole. A limiting flange is provided on the double-headed stud. The two ends of the double-headed stud are respectively threadedly connected to the threaded hole of the welding nut and the third mounting hole. The limiting flange fits between the vehicle body cross beam and the battery cover.

[0015] In some embodiments, the upper cover insert includes a limiting portion and an abutting portion arranged around the outside of the limiting portion. The thickness of the abutting portion along the first direction is less than the thickness of the limiting portion. The limiting portion is embedded in the second mounting hole and abuts between the limiting flange and the plug block. The battery upper cover is clamped between the abutting portion and the limiting flange.

[0016] In some embodiments, a first annular sealing groove is formed on a side of the limiting portion facing the limiting flange, and a sealing ring is filled in the first sealing groove.

[0017] In some embodiments, a second annular sealing groove is provided on the side of the abutting portion facing the battery cover, and the second sealing groove is filled with sealant; the second sealing groove extends from the inner edge of the abutting portion toward the outer edge of the abutting portion.

[0018] In some embodiments, the limiting flange includes a flange inner circumference and a flange outer circumference arranged outside the flange inner circumference. The thickness of the flange outer circumference along the first direction is less than the thickness of the flange inner circumference, and the flange outer circumference is attached to the battery cover.

[0019] The present application also provides a vehicle comprising any one of the above battery pack middle fixing point devices.

[0020] The above technical solution has the following beneficial effects:

[0021] The plug block, battery pack middle fixing point device and vehicle provided by the present application are arranged in the body cross beam, battery cover and battery longitudinal beam along the height direction of the body. A second mounting hole is provided on the battery cover, and a third mounting hole is provided at the position of the battery mounting point of the battery longitudinal beam. The connector connected to the body cross beam is passed through the second mounting hole and then limited in the third mounting hole, thereby avoiding the connector from passing through the battery pack from the bottom of the battery pack, reducing the space required for setting the mounting point of the battery pack, and increasing the utilization rate of the space; along the penetration direction of the connector, the upper cover insert located on the outer periphery of the connector is sealed and abutted between the plug block and the battery cover to seal the battery longitudinal beam and the battery cover, and the body sealing ring located on the outer periphery of the connector is sealed between the body cross beam and the battery cover. Compared with the connection method of passing through the bottom of the battery longitudinal beam by bolts, there is no need to seal the bottom of the battery longitudinal beam along the height direction of the battery longitudinal beam, which reduces the difficulty of sealing the battery pack at the mounting point and realizes effective sealing of the battery pack at the mounting point. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is an exploded view of a fixing point device in the middle of a battery pack in some embodiments of the present application.

[0023] FIG2 is a longitudinal cross-sectional view of a connecting member and a plug at a connection point in some embodiments of the present application.

[0024] FIG3 is a cross-sectional view of the connection between the connector and the battery cover in some embodiments of the present application.

[0025] FIG4 is a schematic structural diagram of a battery longitudinal beam in some embodiments of the present application.

[0026] FIG5 is a diagram showing the process of installing a plug into a battery longitudinal beam in some embodiments of the present application.

[0027] FIG6 is a schematic structural diagram of a battery longitudinal beam provided with a third mounting hole in some embodiments of the present application.

[0028] FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 .

[0029] FIG8 is a cross-sectional view taken along line BB in FIG6 .

[0030] Figure numbers 1-body cross beam, 10-first mounting hole, 11-welding nut; 2-battery cover, 20-second mounting hole; 3-battery longitudinal beam, 30-cavity, 31-embedded hole, 32-first welding area, 33-second welding area; 4-connector, 40-limiting flange, 401-inner periphery of flange, 402-outer periphery of flange; 5-block, 50-first block, 500-weight reduction part, 501-first reinforcement rib, 51-second block, 510-second reinforcement rib, 52-positioning step, 53-third mounting hole; 6-body sealing ring; 7-top cover insert, 70-limiting part, 700-first sealing groove, 701-sealing ring, 71-abutting part, 710-second sealing groove. DETAILED DESCRIPTION

[0031] Some embodiments of the present application are further described below with reference to the accompanying drawings.

[0032] It is easy to understand that according to the technical solution of this application, a variety of structural methods and implementation methods can be replaced with each other by those skilled in the art without changing the essential spirit of this application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of this application and should not be regarded as the entire application or as a limitation or restriction of the invention technical solution.

[0033] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0034] Please refer to Figures 2 and 7. The present application provides a plug 5, which is a T-shaped hollow structure. The plug 5 includes a first block 50 and a second block 51 connected to each other. The outer diameter of the second block 51 is larger than the outer diameter of the first block 50. The first block 50 is provided with a mounting hole 53; the plug 5 is arranged in the embedding hole 31 of the first component; the connecting piece 4 of the second component is connected to the mounting hole 53.

[0035] In some embodiments, the first block 50 is further provided with a weight-reducing portion 500, which is hollow and provided with first reinforcing ribs 501 arranged in an intersecting manner;

[0036] The interior of the second block 51 is hollow and provided with a second reinforcing rib 510 . The second reinforcing rib 510 is supported in the second block 51 along the first direction or in a direction forming a certain acute angle with the first direction.

[0037] In some embodiments, the second block 51 and the first block 50 define a positioning step at the junction.

[0038] In some embodiments, the mounting hole 53 is a threaded hole.

[0039] The present application provides a battery pack mid-mount fixing point device, comprising: the aforementioned plug 5, a vehicle body cross beam 1, a battery cover 2, and a battery longitudinal beam 3 arranged in sequence along a first direction. The first direction in the present application can be the height direction or the vertical direction (vertical direction) of the vehicle body.

[0040] 1 to 3 , an embedding hole 31 is defined in the battery longitudinal beam 3 , the plug 5 is connected to the battery longitudinal beam 3 and partially disposed in the embedding hole 31 , and the remaining portion of the plug 5 protrudes from the outer surface of the battery longitudinal beam 3 , and the battery upper cover 2 is defined with a second mounting hole 20 .

[0041] As shown in Figures 4 and 5, a third mounting hole 53 is defined within the battery longitudinal beam 3. The third mounting hole 53 is located within the plug 5. The connector 4, which connects to the vehicle body cross beam 1, passes through the second mounting hole 20 and extends into the third mounting hole 53, where it is retained. A portion of the upper cover insert 7 is sealedly abutted between the plug 5 and the battery upper cover 2. The direction indicated by arrow C in Figure 5 indicates the direction in which the plug 5 is inserted into the insertion hole 31. The portion of the plug 5 located within the battery longitudinal beam 3 can be sealed and secured within the battery longitudinal beam 3 by welding. The remaining portion of the plug 5 protrudes from the battery longitudinal beam 3 and is sealed to the top of the battery longitudinal beam 3. In this embodiment, sealing between the battery longitudinal beam 3 and the connector 4 is achieved by only sealing the plug 5 and the connector 4, effectively reducing the sealing difficulty. In some embodiments of the present application, the battery longitudinal beam 3 may be formed from an extruded aluminum profile with a cavity structure. The cavities 30 are arranged at intervals, as shown in Figure 7, to avoid a solid upper portion of the battery longitudinal beam 3.

[0042] A cover insert 7 is also installed in the second mounting hole 20 of the battery cover 2. The cover insert 7 is located on the outer periphery of the connector 4, and a portion of the cover insert 7 is sealed and abutted between the plug 5 and the battery cover 2. An annular body sealing ring 6 is provided between the body cross beam 1 and the battery cover 2, and the connector 4 is located inside the body sealing ring 6.

[0043] Some embodiments of the present application provide a battery pack middle fixing point device, in which a vehicle body cross beam 1, a battery cover 2 and a battery longitudinal beam 3 are arranged in an array along the height direction of the vehicle body, a second mounting hole 20 is provided on the battery cover 2, and a third mounting hole 53 is provided at the position of the battery mounting point of the battery longitudinal beam 3. The connector 4 connected to the vehicle body cross beam 1 is passed through the second mounting hole 20 and then limited in the third mounting hole 53, thereby preventing the connector 4 from passing through the battery pack from the bottom of the battery pack, reducing the space required for setting the mounting point of the battery pack, and increasing the space utilization. Utilization rate; along the penetration direction of the connecting member 4, the upper cover insert 7 located on the outer periphery of the connecting member 4 is sealed and abutted between the plug 5 and the battery upper cover 2 to seal the battery longitudinal beam 3 and the battery upper cover 2. The body sealing ring 6 located on the outer periphery of the connecting member 4 is sealed between the body cross beam 1 and the battery upper cover 2. Compared with the connection method of passing the bottom of the battery longitudinal beam 3 through bolts, there is no need to seal the bottom of the battery longitudinal beam 3 along the height direction of the battery longitudinal beam 3, which reduces the sealing difficulty of the battery pack at the mounting point and realizes effective sealing of the battery pack at the mounting point.

[0044] In some embodiments, the embedding hole 31 includes a first sub-hole and a second sub-hole that are interconnected. The first sub-hole is located between the battery cover 2 and the second sub-hole. The inner diameter of the second sub-hole is larger than that of the first sub-hole. The second sub-hole and the second sub-hole define an embedding step at their intersection. The plug 5 includes a first sub-block 50 and a second sub-block 51 that are connected. The first sub-block 50 is embedded in the first sub-hole, and the second sub-block 51 is embedded in the second sub-hole. The outer diameter of the second sub-block 51 is larger than that of the first sub-block 50. The second sub-block 51 and the first sub-block 50 define a positioning step 52 at their intersection. The embedding step fits on the positioning step 52. As shown in Figure 7, in some embodiments of the present application, the top edge of the first sub-hole is circumferentially welded to the first sub-block 50 at the connection, forming a first weld zone 32. The bottom edge of the second sub-hole is circumferentially welded to the second sub-block 51 at the connection, forming a second weld zone 33. The bottom edge of the second sub-hole is flush with the bottom of the second sub-block 51 to maintain the flatness of the bottom of the battery longitudinal beam 3. In some embodiments of the present application, the matching embedding step and positioning step 52 can effectively limit the freedom of the plug 5 in the vehicle body height direction, preventing the connection (weld) between the plug 5 and the embedding hole 31 from being pulled apart in the vehicle body height direction. This increases the stability of the plug 5 within the longitudinal beam plug 5.

[0045] In some embodiments, the sidewalls of the first sub-block 50 are attached to the inner wall of the first sub-hole, and the sidewalls of the second sub-block 51 are attached to the inner wall of the second sub-hole. As shown in Figures 7 and 8, the above arrangement in some embodiments of the present application can effectively limit the horizontal freedom of the plug 5 and effectively reduce the shear force on the connection (weld) between the plug 5 and the insertion hole 31.

[0046] In some embodiments, the first block 50 is provided with a third mounting hole 53 and a weight-reducing portion 500 along the first direction. The weight-reducing portion 500 is hollow and provided with intersecting first reinforcing ribs 501. The second block 51 is hollow and provided with second reinforcing ribs 510. The second reinforcing ribs 510 support the second block 51 along the first direction or in a direction at an acute angle to the first direction. The weight-reducing portion 500 can effectively reduce the weight of the first block 50. At the same time, the intersecting first reinforcing ribs 501 can support the cavity within the weight-reducing portion 500 in the horizontal and vertical directions, ensuring the structural strength of the weight-reducing portion 500. The hollow configuration of the second block 51 can effectively reduce the weight of the second block 51. The second reinforcing ribs 510 at an acute angle to the first direction provide horizontal and vertical support for the second block 51, ensuring the structural strength of the second block 51.

[0047] In some embodiments, a first mounting hole 10 is defined in the vehicle body cross beam 1, and a weld nut 11 is also provided on the vehicle body cross beam 1. The threaded hole of the weld nut 11 is aligned with the first mounting hole 10. The connector 4 is a stud, and the third mounting hole 53 is a threaded hole. The stud is provided with a limiting flange 40. The upper end of the stud passes through the first mounting hole 10 and is threadedly connected to the threaded hole of the weld nut 11. The lower end of the stud is threadedly connected within the third mounting hole 53. The limiting flange 40 fits between the vehicle body cross beam 1 and the battery cover 2. In some embodiments of the present application, the threaded hole of the weld nut 11 and the threaded third mounting hole 53 are respectively threadedly connected to the two threaded ends of the stud, serving as the central mounting point for the battery pack, facilitating assembly and disassembly and ensuring stability and reliability.

[0048] In some embodiments, the upper cover insert 7 includes a retaining portion 70 and an abutting portion 71 disposed around the outer side of the retaining portion 70. The thickness of the abutting portion 71 along a first direction is less than that of the retaining portion 70. The retaining portion 70 is sandwiched within the second mounting hole 20 and abuts between the retaining flange 40 and the plug 5. The battery cover 2 is sandwiched between the abutting portion 71 and the retaining flange 40. As shown in Figures 2 and 3, in some embodiments of the present application, the retaining portion 70 seals against the plug 5 and the retaining flange 40, effectively positioning and sealing the plug 5 and the retaining flange 40 in the vertical direction. Because the abutting portion 71 is vertically lower than the retaining portion 70, a step structure is formed between the retaining portion 70 and the retaining flange 40. This, in conjunction with the retaining flange 40, defines a groove-like structure that sandwiches the battery cover 2, thereby stably retaining the battery cover 2 between the upper cover insert 7 and the retaining flange 40 and enhancing the stability of the connection between the upper cover insert 7 and the battery cover 2.

[0049] In some embodiments, a first annular sealing groove 700 is defined on the side of the limiting portion 70 facing the limiting flange 40. The first sealing groove 700 is filled with a sealing ring 701. As shown in Figures 2 and 3, the first sealing groove 700 may be filled with an O-ring 701, forming an annular seal on the side of the connector 4 facing the limiting flange 40.

[0050] In some embodiments, a second annular sealing groove 710 is provided on the side of the abutment portion 71 facing the battery cover 2. The second sealing groove 710 is filled with sealant, and the second sealing groove 710 extends from the inner edge of the abutment portion 71 toward the outer edge of the abutment portion 71. The second sealing groove 710 in some embodiments of the present application is used to store sealant to achieve an annular seal between the battery cover 2 and the cover insert 7. As shown in Figure 3, the second sealing groove 710 extends from the inner edge of the abutment portion 71 toward the outer edge of the abutment portion 71, and can effectively seal the battery cover 2 and the cover insert 7 along the transverse direction of the abutment portion 71. The double seal of the sealing ring 701 and the sealant effectively increases the reliability of the seal.

[0051] In some embodiments, the retaining flange 40 includes an inner flange periphery 401 and an outer flange periphery 402 disposed around the outer flange periphery 401. Along a first direction, the thickness of the outer flange periphery 402 is less than that of the inner flange periphery 401, and the outer flange periphery 402 is attached to the battery cover 2. As shown in Figures 2 and 3, the reduced thickness of the outer flange periphery 402 can effectively clamp and retain the battery cover 2 while reducing the weight of the retaining flange 40 and saving costs.

[0052] The present application also provides a vehicle comprising the battery pack middle fixing point device of any one of the above embodiments.

[0053] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0054] The above are only the principles and some embodiments of the present application. It should be noted that, for those skilled in the art, based on the principles of the present application, several other modifications can be made, which should also be considered as the scope of protection of the present application.

Claims

1. A plug, characterized in that: The plug is a T-shaped hollow structure, comprising a first block and a second block connected to each other, the outer diameter of the second block being larger than the outer diameter of the first block, and the first block being provided with a mounting hole; The plug is arranged in the embedding hole of the first component; The connecting piece of the second component is connected to the mounting hole.

2. The plug according to claim 1, characterized in that The first block is further provided with a weight-reducing portion, which is hollow and provided with first reinforcing ribs arranged in an intersecting manner; The interior of the second block is hollow and provided with a second reinforcing rib. The second reinforcing rib is supported in the second block along a first direction or a direction forming a certain acute angle with the first direction.

3. The plug according to any one of claims 1 to 2, characterized in that: The second block and the first block define a positioning step at a junction.

4. The plug according to any one of claims 1 to 3, characterized in that The mounting hole is a threaded hole.

5. A battery pack middle fixing point device, characterized in that: include: The plug according to any one of claims 1 to 4, a vehicle body crossbeam, a battery upper cover and a battery longitudinal beam arranged in sequence along a first direction; An embedding hole is formed in the battery longitudinal beam, the plug is connected to the battery longitudinal beam and partially disposed in the embedding hole, and the remaining portion of the plug protrudes from the outer surface of the battery longitudinal beam; The battery upper cover is provided with a second mounting hole; A connecting member connected to the vehicle body cross beam passes through the second mounting hole and is positioned in the mounting hole of the plug block, the mounting hole being arranged along the first direction and serving as a third mounting hole in the battery longitudinal beam; An upper cover insert is also installed in the second mounting hole of the battery upper cover, the connecting piece is located in the upper cover insert, and the upper cover insert is partially sealed and abutted between the plug and the battery upper cover; an annular body sealing ring is sealed between the body cross beam and the battery upper cover, and the connecting piece is located in the body sealing ring.

6. The battery pack middle fixing point device according to claim 5, characterized in that: The embedding hole includes a first sub-hole and a second sub-hole that are connected to each other, the first sub-hole is located between the battery cover and the second sub-hole, the inner diameter of the second sub-hole is larger than the inner diameter of the first sub-hole, and the second sub-hole and the second sub-hole define an embedding step at the intersection; The first block is embedded in the first hole, and the second block is embedded in the second hole. The outer diameter of the second block is larger than the outer diameter of the first block. A positioning step is defined at the junction of the second block and the first block. The embedded step is fitted on the positioning step.

7. The battery pack middle fixing point device according to any one of claims 5 to 6, characterized in that: A first mounting hole is provided on the body cross beam, and a welding nut is also provided on the body cross beam. The threaded hole of the welding nut is aligned with the first mounting hole. The connecting piece is a stud, and the third mounting hole is a threaded hole. A limiting flange is provided on the stud, and both ends of the stud are respectively threadedly connected to the threaded hole of the welding nut and the third mounting hole. The limiting flange fits and abuts between the body cross beam and the battery cover.

8. The battery pack middle fixing point device according to claim 7, characterized in that: The upper cover insert includes a limiting portion and an abutting portion arranged around the outside of the limiting portion. The thickness of the abutting portion along the first direction is less than the thickness of the limiting portion. The limiting portion is embedded in the second mounting hole and abuts between the limiting flange and the plug block. The battery upper cover is clamped between the abutting portion and the limiting flange.

9. The battery pack middle fixing point device according to claim 8, characterized in that: A first annular sealing groove is formed on a side of the limiting portion facing the limiting flange, and a sealing ring is filled in the first sealing groove.

10. The battery pack middle fixing point device according to any one of claims 8 to 9, characterized in that: A second annular sealing groove is formed on one side of the abutting portion facing the battery cover, and the second sealing groove is filled with sealant; The second sealing groove extends from the inner edge of the abutting portion toward the outer edge of the abutting portion.

11. The battery pack middle fixing point device according to any one of claims 7 to 10, characterized in that: The limiting flange includes a flange inner circumference and a flange outer circumference arranged outside the flange inner circumference. The thickness of the flange outer circumference along the first direction is smaller than the thickness of the flange inner circumference. The flange outer circumference is attached to the battery cover.

12. A vehicle, characterized in that: Including the battery pack middle fixing point device according to any one of claims 7 to 11.

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