Sealing connection structure, battery box body and vehicle

Abstract

The utility model discloses a sealing connection structure, a battery box body and a vehicle, the sealing connection structure comprises a rivet nut, and the rivet nut comprises a nut connection flange; the sealing element is sleeved on the peripheral wall of the nut connecting flange in a clearance manner; wherein at least one of the inner peripheral wall of the sealing element and the outer peripheral wall of the nut connecting flange is provided with a protruding structure, the protruding structure is located in a gap between the sealing element and the nut connecting flange, and the centering degree when the sealing element and the nut connecting flange are installed can be improved by arranging the protruding structure; eccentricity is avoided, so that the radial size of real and effective sealing is increased, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a battery box body sealing connection structure, a battery box body and a vehicle. Background Art

[0002] Electric vehicles are one of the main development trends in the automotive field. Their safety performance has attracted much social attention. Looking at all the fire accidents of electric vehicles in recent years, the fire accidents caused by water immersion account for a relatively high proportion. It can be seen that as the power source of electric vehicles, the safety of the battery pack directly affects the safety of the whole vehicle. The sealing and waterproofing of the battery box body shell is crucial for protecting the insulation of the internal battery box body module and the power supply system.

[0003] For example, in the related art, as Figures 5 to 7 , the box main body 100' and the box cover 200' are connected and sealed by a rivet nut 310', a bolt 320' and a seal 330'. Specifically, a first connection part 110' is arranged on the outer wall of the box main body 100', and a first connection hole 111' is arranged on the first connection part 110'. At the same time, a second connection part 210' is arranged on the outer wall of the box cover 200', and a second connection hole 211' is arranged on the second connection part 210'. The second connection part 210' abuts against the first connection part 110', and the second connection hole 211' communicates with the first connection hole 111'. In order to reduce the self-weight, the box main body 100' and the box cover 200' are made of aluminum profiles. A limiting sleeve 400' is arranged in the second connection hole 211', and the limiting sleeve 400' can be made of steel material to improve the internal strength of the second connection hole 211'. In Figure 5 shows the ideal state, that is, the rivet nut 310', the bolt 320', the seal 330' and the limiting sleeve 400' are concentric. At this time, the effective sealing width of the seal 330' is a1'. However, in the actual assembly process, it is very difficult for the rivet nut 310', the bolt 320', the seal 330' and the limiting sleeve 400' to be concentric. As Figure 6 shows, if the seal 330' is biased to the right in the figure and the limiting sleeve 400' is biased to the left, the theoretical pressing width, that is, the theoretical sealing width of the seal 330' will become smaller, becoming a2'. And the actual situation is more serious, because the seal 330' itself has a certain ductility, and there cannot be an abrupt change in the axial direction at the compressed position. The actual compression state diagram can be seen in Figure 7 , then the actual effective sealing width is a3', which is smaller than a1'. However, in the related art, due to the existence of errors such as assembly, there is a gap between the actual effective sealing width and the designed effective sealing size, resulting in assembly deviation and poor sealing effect of the battery box body. Summary of the Utility Model

[0004] The purpose of the present utility model is to overcome the deficiencies of related technologies and provide a sealing connection device, a battery box body, and a vehicle. The sealing connection device can improve the sealing effect and is used to ensure the sealing of the battery box body.

[0005] According to the first aspect of the present utility model, a sealing connection structure is provided, including:

[0006] A rivet nut, the rivet nut includes a nut connection flange;

[0007] A seal, the seal is sleeved on the outer peripheral wall of the nut connection flange in an intermittent manner;

[0008] Wherein, a protruding structure is provided on at least one of the inner peripheral wall of the seal and the outer peripheral wall of the nut connection flange, and the protruding structure is located between the seal and the nut connection flange.

[0009] In one embodiment, the protruding structure extends along the radial direction of the seal, and a inclined surface is provided at the free end of the protruding structure, which is inclined relative to the radial direction of the seal.

[0010] In one embodiment, the rivet nut further includes a nut body. In the direction from the nut connection flange to the nut body, the outer peripheral surface of the protruding structure gradually approaches the closer surface of the inner peripheral wall of the seal and the outer peripheral wall of the nut connection flange.

[0011] In one embodiment, the protruding structure is an annular member, one side peripheral wall of the annular member is the free end, the other side peripheral wall of the annular member is the fixed end, and the fixed end is in fitting connection with the closer surface of the inner peripheral wall of the seal and the outer peripheral wall of the nut connection flange.

[0012] In one embodiment, the protruding structure is integrally connected to the seal or the nut connection flange provided with the protruding structure.

[0013] In one embodiment, the free end of the protruding structure abuts against the closer surface of the inner peripheral wall of the seal and the outer peripheral wall of the nut connection flange.

[0014] According to the second aspect of the present utility model, a battery box body is provided, including the above-mentioned sealing connection structure.

[0015] In one embodiment, it further includes:

[0016] A box body, the box body has an opening;

[0017] A box cover, the box cover covers the opening;

[0018] Wherein, the box body and the box cover are hermetically connected through the sealing connection structure, the rivet nut is installed in the connection hole of the box body, and the sealing member is located between the box body and the box cover;

[0019] And / or, the sealing connection structure further includes a limit sleeve and a fixing bolt. The limit sleeve is installed in the connection hole of the box cover. The nut body of the rivet nut extends away from the box cover from the nut connection flange. After the fixing bolt sequentially passes through the limit sleeve and the sealing member, it is threadedly connected to the rivet nut.

[0020] In one embodiment, the axial cross-section of the protruding structure is a right triangle and is integrally connected to the inner wall of the sealing member. The inner wall of the protruding structure extends obliquely, and the minimum value of the diameters of the inner wall of the protruding structure is equal to the outer diameter value of the nut connection flange, while the maximum value of the diameters of the inner wall of the protruding structure is equal to the outer diameter value of the nut connection flange plus the difference between the inner diameter value of the limit sleeve and the diameter value of the bolt body of the bolt.

[0021] According to the third aspect of the present invention, a vehicle is provided, including the above battery box body.

[0022] Adopting the above technical solution, the following beneficial effects are obtained: By providing a radially protruding protruding structure on at least one of the inner peripheral wall of the sealing member and the outer peripheral wall of the nut connection flange, the centering degree during the installation of the two can be improved, avoiding the problem that the actual effective sealing width is different from the designed effective sealing width due to the existence of assembly errors, thereby avoiding eccentricity and increasing the radial dimension of the actual effective seal to improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Referring to the drawings, the disclosure of the present invention will become more understandable. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the protection scope of the present invention. In the drawings:

[0024] Figure 1 Shows the battery box body of an embodiment of the present invention;

[0025] Figure 2 Shows Figure 1 The design drawing of an embodiment at position A of

[0026] Figure 3 Shows Figure 2 The assembly drawing of the embodiment in

[0027] Figure 4 Shows Figure 1 The design drawing of another embodiment at position A of

[0028] Figure 5 Shows the design drawing of the sealing connection device in the related art;

[0029] Figure 6 Shows Figure 5 the assembly of the embodiment in Figure 1 where there is an axial mutation in the seal;

[0030] Figure 7 Shows Figure 5 the assembly of the embodiment in Figure 2 where there is no axial mutation in the seal.

[0031] In the drawings, like parts are denoted by like reference numerals. The drawings are not drawn to actual scale. Detailed Description of the Invention

[0032] The following further describes the specific embodiments of the present invention with reference to the drawings.

[0033] An embodiment of the present invention provides a sealing connection structure. As Figure 1 shown, the sealing connection structure is used on the one hand to connect the box body 100 and the box cover 200 of the battery box, and on the other hand to ensure the seal between the box body 100 and the box cover 200.

[0034] Specifically, as Figure 2 and 4As shown, the sealed connection structure includes a blind rivet nut 310 and a seal 330. In addition, the sealed connection structure further includes a bolt 320. Among them, the blind rivet nut 310 includes a nut body 311 and a nut connection flange 312 provided at one end of the nut body 311. For example, during use, after the blind rivet nut 310 is blind riveted and fixed to the box body 100, the nut connection flange 312 abuts against the first connection portion 110 of the box body 100. The blind rivet nut 310 is blind riveted and fixed to the position to be connected of the first connection portion 110 through the nut connection flange 312 and the blind rivet clamping portion 313. The bolt 320 includes a bolt body 321. After installation, one end of the bolt body 321 passes through the box cover 200, then passes through the nut connection flange 312 and is inserted into the nut body 311 of the blind rivet nut 310, and is threadedly connected to the nut body 311 to fixedly connect the box body 100 and the box cover 200. The seal 330 is sleeved on the outer peripheral wall of the nut connection flange 312 in a gap manner and is clamped between the box body 100 and the box cover 200 to play a sealing role. According to the present application, a protruding structure 340 is provided on at least one of the inner peripheral wall of the seal 330 and the outer peripheral wall of the nut connection flange 312. That is to say, the protruding structure 340 is provided on the inner peripheral wall of the seal 330, or the protruding structure 340 is provided on the outer peripheral wall of the nut connection flange 312, or the protruding structure 340 is provided on both the inner peripheral wall of the seal 330 and the outer peripheral wall of the nut connection flange 312. By providing the protruding structure 340, the eccentricity between the seal 330 and the nut connection flange 312 can be reduced during installation, the centering property can be improved, and the problem that the actual effective sealing width is different from the designed effective sealing width due to the existence of assembly errors can be avoided, thereby ensuring the radial dimension of the true and effective seal and improving the sealing effect. If, see Figure 5 , in the related art, the box body 100' and the box cover 200' are connected and sealed by a blind rivet nut 310', a bolt 320' and a seal 330'. Specifically, a first connection portion 110' is provided on the outer wall of the box body 100', and a first connection hole 111' is provided on the first connection portion 110'. At the same time, a second connection portion 210' is provided on the outer wall of the box cover 200', and a second connection hole 211' is provided on the second connection portion 210'. The second connection portion 210' is docked with the first connection portion 110', and the second connection hole 211' communicates with the first connection hole 111'. In order to reduce the self-weight, the box body 100' and the box cover 200' are made of aluminum profiles. A limit sleeve 400' is provided in the second connection hole 211', and the limit sleeve 400' can be made of steel material to improve the inner strength of the second connection hole 211'. In Figure 5The ideal state is shown, that is, the blind rivet nut 310’, the bolt 320’, the seal 330’ and the spacer sleeve 400’ are concentric. At this time, the effective sealing width of the seal 330’ is a1’. However, in the actual assembly process, it is very difficult for the blind rivet nut 310’, the bolt 320’, the seal 330’ and the spacer sleeve 400’ to be concentric. As Figure 6 shown, for example, if the seal 330’ is biased to the right in the figure while the spacer sleeve 400’ is biased to the left, the theoretical crimping width, i.e., the theoretical sealing width, of the seal 330’ will become smaller, becoming a2’. And the actual situation is more serious because the seal 330’ itself has a certain ductility, and there cannot be an abrupt change in the axial direction at the compressed position. The true compression state diagram can be seen in Figure 7 , then the actual effective sealing width is a3’, which is smaller than a1’. It can be obtained that in the related art, due to the existence of errors such as assembly, the actual effective sealing width a3’ is different from the effective sealing size a1’, affecting the sealing effect.

[0035] Through the present application, since the protruding structure 340 is provided, the problem that the actual effective sealing width is different from the designed effective sealing width due to the existence of assembly errors as described above is avoided. Furthermore, eccentricity is avoided, installation errors can be effectively avoided, and thus the width of effective sealing can be ensured, thereby improving the sealing efficiency.

[0036] It can be understood that the protruding structure 340 is configured as a protruding body structure. The protruding structure 340 extends along the radial direction of the seal 330, or may extend at a certain angle to the radial direction of the seal 330, as long as the protruding structure 340 has a projection protruding in the radial direction of the seal 330. For example, the protruding structure 340 may be one of structures such as rod-shaped, bar-shaped, and needle-shaped.

[0037] The free end of the protruding structure 340 is provided with an inclined surface inclined relative to the radial direction of the seal 330. That is to say, the free end of the protruding structure 340 includes at least one inclined surface, and the angle formed by this inclined surface and the radial direction of the seal 330 is greater than zero degree and less than ninety degrees. The free end of the protruding structure 340 may further include other inclined surfaces with different inclination angles from this section of the inclined surface. Even the free end of the protruding structure 340 may further include a plane with an angle of zero degree or ninety degrees with the radial direction of the seal 330. In the direction from the nut connection flange 312 to the nut body 311, the outer peripheral surface of the protruding structure 340 gradually approaches the closer surface among the inner peripheral wall of the seal 330 and the outer peripheral wall of the nut connection flange 312.

[0038] In one embodiment, the protruding structure 340 is an annular member. One circumferential wall of the annular member is a free end 342, and the other circumferential wall is a fixed end 341. The free end 342 of the protruding structure 340 includes an inclined surface that is radially inclined with respect to the seal 330. In Figure 2 the embodiment, if the protruding structure 340 is provided on the seal 330, the fixed end 341 of the protruding structure 340 refers to the end close to the inner wall of the seal 330, and the free end 342 refers to the end that deviates from the inner wall of the seal 330 and is close to the outer circumferential wall of the nut connection flange 312. And in Figure 4 the implementation, if the protruding structure 340 is provided on the nut connection flange 312, the fixed end 341 of the protruding structure 340 refers to the end close to the outer circumferential wall of the nut connection flange 312, and the free end 342 refers to the end that deviates from the outer circumferential wall of the nut connection flange 312 and is close to the inner circumferential wall of the seal 330.

[0039] In one embodiment, the axial cross-section of the protruding structure 340 is a right triangle. One of the right-angled sides is used as the fixed end 341 for fixedly connecting to one of the inner circumferential wall of the seal 330 and the outer circumferential wall of the nut connection flange 312, and the other right-angled side is used as the free end 342 and extends in the other direction of the inner circumferential wall of the seal 330 and the outer circumferential wall of the nut connection flange 312. This setting can ensure that the free end 342 of the protruding structure 340 is an inclined surface, and can also ensure that there is at least a gap required for installation between the seal 330 and the nut connection flange 312 at one end in the axial direction, and has a relatively small impact on the installation fit of the seal 330 and the nut connection flange 312.

[0040] The free end 342 of the protruding structure 340 abuts against the surface of the inner circumferential wall of the seal 330 and the outer circumferential wall of the nut connection flange 312 that is close. That is, the other right-angled side of the protruding structure 340 extends to the other of the inner circumferential wall of the seal 330 and the outer circumferential wall of the nut connection flange 312. That is to say, in one case, the protruding structure 340 is fixed to the seal 330 and abuts against the outer circumferential wall of the nut connection flange 312 after installation; in another case, the protruding structure 340 is fixed to the nut connection flange 312 and abuts against the inner circumferential wall of the seal 330 after installation. Through this setting, it can be fully ensured that the installation of the seal 330 and the nut connection flange 312 is centered, and the effective sealing dimension is maximally ensured.

[0041] The protruding structure 340 is integrally connected to the seal 330 or the nut connection flange 312 on which the protruding structure 340 is provided. That is to say, whether the protruding structure 340 is provided on the seal 330 or on the nut connection flange 312, it is integrally connected thereto. This setting simplifies the structure and reduces the production cost. This application does not improve the material of the seal 330. For example, the seal 330 can be made of foam or rubber, and the material of the protruding structure 340 is the same as that of the seal 330. Of course, the protruding structure 340 can also be a separate component independent of the seal 330 and the nut connection flange 312.

[0042] In one embodiment, the protruding structure 340, as Figure 2 shown, is provided on the seal 330. Of course, the protruding structure 340 is not limited to being provided on the seal 330, and can also be as Figure 4 shown, provided on the nut connection flange 312. It is easy to understand that when the protruding structure 340 is provided on the seal 330, compared with when the protruding structure 340 is provided on the nut connection flange 312, the processing is simple and easy to implement, and the overall manufacturing cost can be reduced.

[0043] When the protruding structure 340 is integrally connected to the seal 330, in the direction from the nut connection flange 312 to the nut body 311, the hypotenuse of the protruding structure 340 with a right-angled triangle axial cross-section gradually approaches the nut connection flange 312. This setting makes the gap between the protruding structure 340 and the nut connection flange 312 change gradually, and the gap is the smallest at the end that abuts against the box body 100. This setting helps to effectively ensure the centering installation of the seal 330 and the nut connection flange 312.

[0044] This application also relates to a battery box. As Figure 1 shown, the battery box includes a box body 100, a box cover 200 and the above-mentioned sealed connection structure. The box body 100 and the box cover 200 are connected and sealed by the above-mentioned sealed connection structure. Specifically, as Figure 2As shown in the figure, a first connection part 110 is provided on the outer wall of the box body 100, and a first connection hole 111 is provided on the first connection part 110. At the same time, a second connection part 210 is provided on the outer wall of the box cover 200, and a second connection hole 211 is provided on the second connection part 210. The second connection part 210 is docked with the first connection part 110, and the second connection hole 211 communicates with the first connection hole 111. In order to reduce the self-weight, the box body 100 and the box cover 200 are made of aluminum profiles. A limit sleeve 400 is provided in the second connection hole 211. The limit sleeve 400 can be made of steel material to improve the internal strength of the second connection hole 211. After the battery box body according to the present application is installed in the ideal state, that is, the blind rivet nut 310, the bolt 320, the seal 330 and the limit sleeve 400 are concentric, and the effective sealing width is a1. The above gives an embodiment of applying this sealed connection structure to the battery box body. It can be understood that this sealed connection structure can also be applied to similar structures that require connection and sealing.

[0045] Of course, in the actual assembly process, it is very difficult to achieve coaxial installation, and there will be eccentricity of different components in the actual assembly. As Figure 3 shown, when the limit sleeve 400 is located at the leftmost end, the pressed width of the seal 330 is the smallest. The axial section of the protruding structure 340 is a right triangle and is integrally connected to the inner wall of the seal 330. The inner wall slope of the protruding structure 340 extends, and the minimum value of the inner diameter of the protruding structure 340 is equal to the outer diameter value of the nut connection flange 312, while the maximum value of the inner diameter of the protruding structure 340 is equal to the outer diameter value of the nut connection flange 312 plus the difference between the inner diameter value of the limit sleeve 400 and the diameter value of the bolt body 321 of the bolt 320. That is to say, in Figure 3 , it is set that the outer diameter of the nut connection flange 312 is e; the inner diameter of the protruding structure 340 is set with an inclined surface, the upper end aperture is f, and the lower section aperture is the same as the outer diameter e of the nut connection flange 312; the inner diameter of the limit sleeve 400 is c; the outer diameter of the bolt body 321 is b. If f - e = c - b, then it can be obtained that f = c - b + e, and a2 = a1, and the sealing width is not affected by the assembly error. It can be seen that the present application can improve the effective sealing width of the product without increasing the space cost and can improve the sealing effect.

[0046] The present application also relates to a vehicle. The vehicle includes the above-mentioned battery box body.

[0047] The above are only the principles and preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, based on the principles of the present invention, several other variations can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A sealed connection structure, characterized in that: include: A pull rivet nut, the pull rivet nut comprising a nut connecting flange; A sealing member, the sealing member being sleeved in a gap-type manner on the outer peripheral wall of the nut connection flange; Wherein, a protruding structure is provided on at least one of the inner peripheral wall of the sealing member and the outer peripheral wall of the nut connecting flange, and the protruding structure is located in the gap between the sealing member and the nut connecting flange.

2. The sealing connection structure according to claim 1, characterized in that: The protruding structure extends in the radial direction of the sealing member, and a free end of the protruding structure is provided with an inclined surface inclined relative to the radial direction of the sealing member.

3. The sealing connection structure according to claim 2, characterized in that: The rivet nut also includes a nut body, and in the direction from the nut connecting flange to the nut body, the outer peripheral surface of the protruding structure gradually approaches the inner peripheral wall of the seal and the surface close to the outer peripheral wall of the nut connecting flange.

4. The sealing connection structure according to claim 2, characterized in that: The protruding structure is an annular part, one side circumferential wall of the annular part is the free end, and the other side circumferential wall of the annular part is the fixed end, and the fixed end is fitted and connected to the inner circumferential wall of the seal and the adjacent surface of the outer circumferential wall of the nut connecting flange.

5. The sealing connection structure according to claim 2, characterized in that: The protruding structure is integrally connected to the sealing member or the nut connecting flange on which the protruding structure is arranged.

6. The sealing connection structure according to any one of claims 1 to 5, characterized in that: The free end of the protruding structure abuts against adjacent surfaces of the inner peripheral wall of the sealing component and the outer peripheral wall of the nut connecting flange.

7. A battery box, characterized in that: A sealed connection structure as claimed in any one of claims 1 to 6.

8. The battery case according to claim 7, characterized in that: Also includes: A box body, wherein the box body has an opening; A box cover, the box cover is closed on the opening; The box body and the box cover are sealed and connected via the sealing connection structure, the rivet nut is installed in the connection hole of the box body, and the sealing member is located between the box body and the box cover; And / or, the sealing connection structure also includes a limiting sleeve and a fixing bolt, the limiting sleeve is installed in the connecting hole of the box cover, the nut body of the rivet nut extends from the nut connecting flange in a direction away from the box cover, and the fixing bolt passes through the limiting sleeve and the sealing member in sequence and is threadedly connected to the rivet nut.

9. The battery case according to claim 8, characterized in that: The axial cross-section of the protruding structure is a right triangle and is integrally connected to the inner wall of the seal. The inner wall of the protruding structure extends obliquely, and the minimum value of the diameter of the inner wall of the protruding structure is equal to the outer diameter value of the nut connecting flange, and the maximum value of the diameter of the inner wall of the protruding structure is equal to the outer diameter value of the nut connecting flange plus the difference between the inner diameter value of the limit sleeve and the diameter value of the bolt body of the bolt.

10. A vehicle, characterized in that: Comprising a battery case according to any one of claims 7 to 9.

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