Connecting assembly for battery pack and vehicle

Abstract

The utility model provides a connecting assembly for a battery pack and a vehicle. The connecting assembly comprises a mounting nut and a sealing element, the mounting nut is provided with a connecting hole for a fastener to penetrate through, and at least one annular groove is formed in the end face of at least one end of the mounting nut; the sealing part is arranged in the annular groove and has an initial state and a compressed state, when the sealing part is in the initial state, part of the sealing part extends out of the annular groove, and when the sealing part is in the compressed state, at least part of the sealing part is compressed into the annular groove. The sealing piece plays a role in sealing, the end face of the installation nut is in hard connection with the vehicle body floor, deformation of the sealing piece under the vibration effect is limited, then stress impact of the sealing piece on the fastening piece is reduced, and the risk of torsion attenuation of the fastening piece is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts manufacturing, and particularly relates to a connecting assembly for a battery pack and a vehicle. BACKGROUND

[0002] With the rapid development of electric vehicles, the automobile power battery assembly is one of the core components of electric vehicles; at present, the power battery assembly of the electric vehicle on the market is mostly installed at the bottom of the automobile and is installed at the front floor and the threshold beam bottom through bolt tightening; if the battery pack mounting nut surface is without a sealing gasket, only relying on bolt tightening to seal the two surfaces together is unreliable, and water leakage is likely to occur; if a sealing soft gasket is directly added to the battery pack mounting nut surface, the sealing soft gasket is repeatedly loaded and unloaded during vehicle operation, which generates cyclic stress, and the cyclic stress acting on the bolt causes fatigue of the bolt material, especially in the stress concentration areas such as the thread root and head of the bolt, which causes the torsional force of the bolt to attenuate, and even causes the bolt to loosen, and the risk of the battery pack falling off.

[0003] In view of the above problems, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to provide a connecting assembly for a battery pack and a vehicle to solve the technical problem of poor sealing at the connection between the battery pack and the vehicle and easy falling off of the battery pack.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a connecting assembly for a battery pack is provided, which comprises: a mounting nut provided with a connecting hole for a fastener to pass through, at least one annular groove is arranged on the end face of at least one end of the mounting nut; a sealing element arranged in the annular groove, the sealing element has an initial state and a compressed state, when the sealing element is in the initial state, part of the sealing element extends outside the annular groove, and when the sealing element is in the compressed state, the sealing element is compressed into the annular groove.

[0006] Further, the sealing element and the mounting nut are detachably connected.

[0007] Further, one of the side wall of the sealing element and the groove wall of the annular groove is provided with a groove, and the other of the side wall of the sealing element and the groove wall of the annular groove is provided with a first protrusion, and at least part of the first protrusion extends into the groove.

[0008] Further, the cross-sectional width of the sealing element is greater than the groove width of the annular groove, and the sealing element and the annular groove are interference fit.

[0009] Further, at least one of the inner side wall and the outer side wall of the sealing element is provided with a second protrusion, and the sealing element is interference fit with the annular groove through the second protrusion.

[0010] Further, the sealing member is provided with at least two sealing lips on the side away from the groove bottom of the annular groove, and the at least two sealing lips are arranged at intervals in the radial direction of the sealing member.

[0011] Further, the mounting nut comprises a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are arranged opposite along the axis direction of the connecting hole, and the annular groove is arranged on at least one of the first mounting portion and the second mounting portion.

[0012] Further, the first mounting portion and the second mounting portion are integrally formed.

[0013] According to another aspect of the present application, a vehicle is provided, comprising: a vehicle body floor; a battery pack connected with the vehicle body floor through a connecting assembly, the sealing member in the connecting assembly abuts against the vehicle body floor, and the fastener sequentially penetrates through the battery pack, the connecting assembly and the vehicle body floor; wherein the connecting assembly is the connecting assembly described above.

[0014] Further, the connecting assembly is located between the battery pack and the vehicle body floor, the first end of the connecting assembly abuts against the outer wall of the battery pack, and the second end of the connecting assembly abuts against the outer wall of the vehicle body floor.

[0015] According to the technical scheme of the present application, the connecting assembly of the battery pack comprises a mounting nut and a sealing member. The mounting nut is provided with a connecting hole and an annular groove, and the sealing member is placed in the annular groove. The thickness of the sealing member is greater than the depth of the annular groove. In the connecting process, the sealing member is compressed into the annular groove under the extrusion force of the fastener. The end surface of the mounting nut and the sealing member abut against the vehicle body floor respectively. The sealing member plays a sealing role. The end surface of the mounting nut and the vehicle body floor are hard connected, which limits the deformation of the sealing member under the vibration effect, thereby reducing the stress impact of the sealing member on the fastener, and further reducing the risk of torsional force decay of the fastener. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application. The present application is not limited by the inappropriate limitations of the embodiments described herein and illustrated in the accompanying drawings. In the drawings:

[0017] Figure 1 A structure schematic view of a first embodiment of the connecting assembly according to the present application is shown;

[0018] Figure 2 A structure schematic view of a second embodiment of the connecting assembly according to the present application is shown;

[0019] Figure 3 A structure schematic view of a third embodiment of the connecting assembly according to the present application is shown;

[0020] Figure 4 A structural schematic diagram of a fourth embodiment of the connecting assembly according to the utility model is shown.

[0021] Figure 5 A structural schematic diagram of a first embodiment of the vehicle according to the utility model is shown.

[0022] Among them, the above-mentioned drawings include the following reference signs:

[0023] 1, mounting nut;

[0024] 11, connecting hole; 12, first mounting portion; 13, second mounting portion; 14, annular groove;

[0025] 2, sealing element;

[0026] 21, second protrusion; 22, sealing lip;

[0027] 3, vehicle body floor;

[0028] 31, first nut;

[0029] 4, battery pack;

[0030] 41, first sleeve; 42, second sleeve;

[0031] 5, fastener. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0036] Combine Figures 1 to 5 As shown, according to a specific embodiment of the present application, a connection assembly for a battery pack is provided.

[0037] Specifically, the connecting assembly includes: a mounting nut 1 and a seal 2, the mounting nut 1 is provided with a connecting hole 11 for the fastener 5 to pass through, and at least one annular groove 14 is provided on the end face of at least one end of the mounting nut 1; the seal 2 is arranged in the annular groove 14, and the seal 2 has an initial state and a compressed state. When the seal 2 is in the initial state, part of the seal 2 extends outside the annular groove 14, and when the seal 2 is in the compressed state, at least part of the seal 2 is compressed into the annular groove 14.

[0038] Applying the technical solution of the present invention, the connection assembly of the battery pack includes a mounting nut 1 and a seal 2. The mounting nut 1 is provided with a connection hole and an annular groove 14, and the seal 2 is placed in the annular groove 14. The thickness of the seal 2 is greater than the depth of the annular groove 14. During the connection process, the seal is compressed into the annular groove 14 by the extrusion force of the fastener 5. The end face of the mounting nut and the seal are respectively in contact with the vehicle body floor, and the seal plays a sealing role. The end face of the mounting nut and the vehicle body floor are hard-connected, which limits the deformation of the seal under vibration, thereby reducing the stress impact of the seal on the fastener, and further reducing the risk of torsional attenuation of the fastener.

[0039] Those skilled in the art will appreciate that the thickness of the seal 2 is greater than the depth of the annular groove 14. After the seal 2 is installed, a portion of the seal 2 protrudes from the end surface of the mounting nut 1 to ensure that the seal 2 is tightly fitted against the vehicle body floor to provide a seal. The seal 2 may be a rubber pad or a silicone pad.

[0040] In an exemplary embodiment of the present application, the seal 2 is fixedly connected to the mounting nut 1 . Specifically, the bottom of the seal 2 is bonded to the bottom of the annular groove 14 .

[0041] In another exemplary embodiment of the present application, the seal 2 is detachably connected to the mounting nut 1. The seal 2 is detachably connected to the mounting nut 1, which facilitates the replacement of the seal 2.

[0042] Furthermore, one of the sidewall of the seal 2 and the groove wall of the annular groove 14 is provided with a groove, and the other of the sidewall of the seal 2 and the groove wall of the annular groove 14 is provided with a first protrusion, at least a portion of which extends into the groove. The seal 2 and the annular groove 14 cooperate via the first protrusion and the groove, thereby enhancing the connection strength between the seal 2 and the mounting nut 1 and preventing the seal 2 from separating from the annular groove 14. In addition, this ensures a tight fit between the seal 2 and the annular groove 14 and effectively prevents leakage of the medium or entry of external impurities, further enhancing the sealing effect of the seal 2. As an alternative embodiment, the cross-sectional width of the seal 2 is greater than the groove width of the annular groove 14, and the seal 2 and the annular groove 14 have an interference fit. The cross-sectional width of the seal 2 is greater than the groove width of the annular groove 14, and the seal 2 has good elasticity. In a compressed state, the seal 2 and the annular groove 14 have an interference fit, enhancing the connection strength between the seal 2 and the mounting nut 1 and preventing the seal 2 from separating from the annular groove 14. In addition, it can ensure that the sealing member 2 and the annular groove 14 are tightly fitted, effectively preventing leakage of the medium or entry of external impurities, and further improving the sealing effect of the sealing member 2.

[0043] Specifically, at least one of the inner and outer sidewalls of the seal 2 is provided with a second protrusion 21, through which the seal 2 is interference-fitted with the annular groove 14. The provision of the second protrusion 21 reduces the contact area between the seal 2 and the wall of the annular groove 14, facilitating assembly and disassembly of the seal 2.

[0044] like Figure 4 As shown, second protrusions 21 are provided on the inner and outer walls of the seal 2. The second protrusions 21 extend along the circumference of the seal 2 to form a circular ring. The seal 2 is interference fit with the annular groove 14 through the second protrusions 21, that is, the distance between the two second protrusions 21 is greater than the groove width of the annular groove 14.

[0045] Further, the sealing member 2 is provided with at least two sealing lips 22 on the side away from the groove bottom of the annular groove 14, and the at least two sealing lips 22 are arranged at intervals in the radial direction of the sealing member 2. The provision of the at least two sealing lips 22 can increase the sealing performance of the sealing member 2.

[0046] As shown in Figure 4 , the sealing member 2 is provided with two sealing lips 22 at the upper end and the lower end, and the sealing lips 22 at the upper end and the lower end are arranged correspondingly. The sealing lip 22 is a semicircular protruding structure, and is arranged along the circumferential direction of the sealing member 2 to form an annular structure.

[0047] Specifically, the mounting nut 1 comprises a first mounting portion 12 and a second mounting portion 13, and the first mounting portion 12 and the second mounting portion 13 are arranged opposite to each other along the axis direction of the connecting hole 11, and the annular groove 14 is arranged on at least one of the first mounting portion 12 and the second mounting portion 13. The first mounting portion 12 and the second mounting portion 13 are arranged to distinguish the upper and lower connecting surfaces of the mounting nut 1, so as to avoid incorrect installation.

[0048] As shown in Figure 2 , Figure 3 , the first mounting portion 12 is a regular hexahedron, and the second mounting portion 13 is a circular truncated cone structure. The cross-sectional width of the first mounting portion 12 is smaller than the diameter of the second mounting portion 13, and the thickness of the first mounting portion 12 is greater than that of the second mounting portion 13. The first mounting portion 12 and the second mounting portion 13 are arranged opposite to each other along the axis direction of the connecting hole 11, and the connecting hole 11 penetrates through the first mounting portion 12 and the second mounting portion 13. In this embodiment, the annular groove 14 is arranged on the first mounting portion 12, and the annular groove 14 is slotted along the upper end surface of the first mounting portion 12. The depth of the annular groove 14 is much smaller than the height of the first mounting portion 12. Further, the first mounting portion 12 and the second mounting portion 13 are integrally formed. The integrally formed structure of the first mounting portion 12 and the second mounting portion 13 can improve the strength and stability of the mounting nut 1, reduce the possible failures and failures in the installation process, and thus improve the service life and safety of the mounting nut 1.

[0049] As shown in Figure 3 , Figure 5 , the provision of the second mounting portion 13 can also increase the contact area with the vehicle body floor, so as to improve the stability of the connection.

[0050] According to another specific embodiment of the present application, a vehicle is provided, comprising a vehicle body floor 3 and a battery pack 4. The battery pack 4 is connected with the vehicle body floor 3 through a connecting assembly, a sealing element 2 in the connecting assembly abuts against the vehicle body floor 3, and a fastener 5 passes through the battery pack 4, the connecting assembly and the vehicle body floor 3 in sequence; wherein the connecting assembly is the connecting assembly described in the above embodiments. The battery pack 4 is connected with the vehicle body floor 3 through the fastener 5 passing through the connecting assembly, at this time the sealing element 2 is in a compressed state, the sealing element 2 and the end surface of the mounting nut abut against the vehicle body floor 3 at the same time, the sealing element plays a sealing role, avoids impurities and water from the connecting place entering the battery pack and the vehicle body, and the end surface of the mounting nut and the vehicle body floor are hard connected, which limits the deformation of the sealing element under the action of vibration, thereby reducing the stress impact of the sealing element on the fastener, and further reducing the risk of torque attenuation of the fastener.

[0051] Further, a first nut 31 is welded inside the vehicle body floor 3, and the fastener 5 passes through the battery pack 4, the connecting assembly and the first nut 31 to be fastened and connected, so as to ensure that the battery pack 4 is mounted to the vehicle body floor 3. In the embodiment, the fastener 5 can be a bolt, and the bolt nut connection is used to firmly mount the battery pack 4 to the vehicle body floor 3, avoiding loosening.

[0052] Further, the connecting assembly is located between the battery pack 4 and the vehicle body floor 3, the first end of the connecting assembly abuts against the outer wall of the battery pack 4, and the second end of the connecting assembly abuts against the outer wall of the vehicle body floor 3.

[0053] Specifically, a first sleeve 41 is arranged on the inner bottom wall of the battery pack, the first sleeve 41 is vertically arranged, and part of the first sleeve 41 extends upward to the outside of the battery pack. A second sleeve 42 is arranged on the inner top wall of the battery pack, the second sleeve 42 is vertically arranged, and the second sleeve 42 is sleeved on the outer wall of the first sleeve 41 to increase the strength of the first sleeve 41. A mounting nut 1 is located between the battery pack 4 and the vehicle body floor 3, and the mounting nut 1 is sleeved on the outside of the first sleeve 41. A first nut 31 is welded on the inner wall of the vehicle body floor 3, and the fastener 5 passes through the first sleeve 41, the second sleeve 42, the mounting nut 1 and the first nut 31 in sequence to realize the connection between the battery pack 4 and the vehicle body floor 3. Wherein, the upper surface of the first mounting portion 12 abuts against the vehicle body floor 3, and the lower surface of the second mounting portion 13 abuts against the outer wall of the battery pack 4.

[0054] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0055] The end face of the mounting nut is provided with an annular groove, and the sealing element is arranged in the annular groove, in the connecting process, the sealing element is compressed into the annular groove 14 under the extrusion of the fastener 5, so that the end face of the mounting nut and the sealing element are respectively abutted with the vehicle body floor, the sealing element plays a sealing role, the end face of the mounting nut and the vehicle body floor are hard connected, the deformation of the sealing element under the vibration is limited, and then the stress impact of the sealing element on the fastener is reduced, and then the risk of torsion force attenuation of the fastener is reduced.

[0056] For the purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "top", "bottom", "horizontal", "vertical", "upper", "lower", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. can be used herein to describe various elements, regions, layers and / or sections but are not intended to be used herein to designate importance or a specific order of employment.

[0057] In addition, it needs to be explained that "one embodiment", "another embodiment", "embodiment" and the like mentioned in the specification mean that the specific features, structures or characteristics described in connection with the embodiment are included in at least one embodiment described in the general description. The same description appears in several places in the specification does not necessarily mean the same embodiment. Further, when a specific feature, structure or characteristic is described in connection with any embodiment, it is claimed that the implementation of such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present application.

[0058] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0059] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connection assembly for a battery pack, characterized by, The mounting nut (1) is provided with a connecting hole (11) for a fastener (5) to pass through, and at least one end face of the mounting nut (1) is provided with at least one annular groove (14). The sealing element (2) is arranged in the annular groove (14), and the sealing element (2) has an initial state and a compressed state. The sealing element (2) is detachably connected with the mounting nut (1).

2. The connection assembly of claim 1, wherein, One of the side wall of the sealing element (2) and the groove wall of the annular groove (14) is provided with a groove, and the other is provided with a first protrusion, at least part of the first protrusion extending into the groove.

3. The connection assembly of claim 2, wherein, The cross-sectional width of the sealing element (2) is greater than the groove width of the annular groove (14), and the sealing element (2) is in interference fit with the annular groove (14).

4. The connection assembly of claim 2, wherein, At least one of the inner side wall and the outer side wall of the sealing element (2) is provided with a second protrusion (21), and the sealing element (2) is in interference fit with the annular groove (14) through the second protrusion (21).

5. The connection assembly of claim 4, wherein, The side of the sealing element (2) away from the groove bottom of the annular groove (14) is provided with at least two sealing lips (22), and the at least two sealing lips (22) are arranged at intervals along the radial direction of the sealing element (2).

6. The connection assembly for a battery pack of claim 1, wherein, The mounting nut (1) comprises a first mounting portion (12) and a second mounting portion (13), the first mounting portion (12) and the second mounting portion (13) are oppositely arranged along the axis direction of the connecting hole (11), and the annular groove (14) is arranged on at least one of the first mounting portion (12) and the second mounting portion (13).

7. The connection assembly for a battery pack of claim 1, wherein, The first mounting portion (12) and the second mounting portion (13) are integrally formed.

8. The connection assembly for a battery pack of claim 7, wherein, The vehicle body floor (3); 9. A vehicle characterized by comprising: The battery pack (4) is connected with the vehicle body floor (3) through a connecting assembly, the sealing element (2) in the connecting assembly abuts against the vehicle body floor (3), and the fastener (5) sequentially passes through the battery pack (4), the connecting assembly and the vehicle body floor (3); The connecting assembly is the connecting assembly of any one of claims 1-8. The connecting assembly is located between the battery pack (4) and the vehicle body floor (3), the first end of the connecting assembly abuts against the outer wall of the battery pack (4), and the second end of the connecting assembly abuts against the outer wall of the vehicle body floor (3). ​ 10. The vehicle of claim 9, wherein, ​

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