Connecting bracket, battery pack and vehicle

Abstract

The utility model relates to a connecting support, a battery pack and a vehicle, the connecting support is provided with a first connecting section used for being fixedly connected with the battery pack, a second connecting section used for being connected with a bottom protection plate of the vehicle, and at least one middle section arranged between the first connecting section and the second connecting section, the structural configuration of the at least one middle section is that acting force F vertically acting on the bottom face of the connecting support can be evenly transmitted to the first connecting section through the middle section. According to the connecting support provided by the invention, at least one middle section is arranged between the first connecting section and the second connecting section, and the structure of the middle section is designed, so that the problem of stress concentration at the bottom of a welding seam of the connecting support can be effectively solved, and the welding seam is prevented from being torn; the connecting strength of the connecting support, the bottom guard plate and the battery pack can be guaranteed, meanwhile, the structural strength of the connecting support can be improved, the performance requirement of the wading working condition is met, and the capacity of resisting wading impact loads is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle manufacturing, and in particular to a connecting bracket, a battery pack and a vehicle. Background Art

[0002] In new energy vehicles, in order to realize the installation of battery packs, in related technologies, the front and rear underbody guards of the vehicle are usually connected to the battery pack cross beam through a connecting bracket. When verifying the connection performance of the underbody guard and the connecting bracket, the wading condition is mainly considered. During the wading process of the whole vehicle, water has a very large load on the underbody guard, especially the backwash has a great impact on the underbody guard. Generally, the water load on the entire underbody guard can reach 4000N. The existing connecting bracket structure is unreasonably designed. Under wading conditions, the bracket or connecting weld is prone to breakage and failure, which leads to the breakage and failure of the plastic underbody guard. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a connection bracket, a battery pack and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a connecting bracket is provided, wherein the connecting bracket has a first connecting section for fixedly connecting to a battery pack, a second connecting section for connecting to a bottom guard plate of a vehicle, and at least one intermediate section arranged between the first connecting section and the second connecting section, wherein the structure of the at least one intermediate section is configured such that a force F acting vertically on the bottom surface of the connecting bracket can be uniformly transmitted to the first connecting section through the intermediate section.

[0005] Optionally, in the thickness direction of the connecting bracket, the size of the at least one intermediate section gradually decreases along the direction from the first connecting section to the second connecting section.

[0006] Optionally, the thickness of the first connecting section is H1, and the thickness of the second connecting section is H2, wherein H1>H2, and 0.3≤ / H1≤0.5.

[0007] Optionally, in the length direction of the connecting bracket, the length of the first connecting segment is D1, the length of the second connecting segment is D2, and the length of the at least one intermediate segment is D3, wherein D2>D1≥D3.

[0008] Optionally, in the width direction of the connecting bracket, the size of the first connecting section gradually increases in a direction away from the middle section.

[0009] Optionally, the bottom surface of the connecting bracket is a plane, and the at least one middle section is an inclined surface connecting the top surfaces of the first connecting section and the second connecting section.

[0010] Optionally, the side surface of the first connecting section is used to be welded and fixed to a crossbeam of the battery pack.

[0011] Optionally, a fastening hole is provided on the second connecting section, and a fastener connecting the connecting bracket and the bottom guard plate can pass through the fastening hole.

[0012] According to a second aspect of an embodiment of the present disclosure, there is provided a battery pack, comprising a crossbeam and a connecting bracket fixed on the crossbeam, wherein the connecting bracket is the connecting bracket described above.

[0013] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising a battery pack and an underbody guard plate, wherein the battery pack and the underbody guard plate are connected via the above-mentioned connecting bracket.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: in the connecting bracket provided by the present disclosure, by setting at least one middle section between the first connecting section and the second connecting section and by designing the structure of the middle section, the problem of stress concentration at the bottom of the connecting bracket weld can be effectively solved, and the weld can be prevented from being torn, thereby ensuring the connection strength between the connecting bracket and the bottom guard plate and the battery pack, and at the same time, the structural strength of the connecting bracket itself can be improved, thereby meeting the performance requirements of wading conditions and enhancing the ability to resist wading impact loads.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 and Figure 2 It is a structural schematic diagram of a connecting bracket according to a related embodiment.

[0018] Figure 3 and Figure 4 The figure is a schematic structural diagram of a connecting bracket according to an exemplary embodiment.

[0019] Figure 5 is a schematic structural diagram of a connecting bracket according to another exemplary embodiment.

[0020] Figure 6 and Figure 7 yes Figure 5 The embodiment shown in FIG. 1 is a side view of a connecting bracket.

[0021] Description of Reference Numerals

[0022] 1, 1', 1"-connecting bracket; 11-first connecting section; 12-second connecting section; 13-middle section; 120-fastening hole; 2-crossbeam. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0025] Considering the cost and weight, Figure 1 and Figure 2 As shown, in a related embodiment of the present disclosure, the connecting bracket 1' is designed as an L-shaped structure, the vertical plate is connected to the battery pack crossbeam by aluminum welds, and the horizontal plate is connected to the bottom guard plate by bolts. This technical solution has the advantages of simple manufacturing process, light weight, and low cost. However, the connecting bracket 1' is insufficiently rigid and has poor bending resistance, which causes the connecting bracket 1' to be easily bent. Under the vertical upward load of wading, the weld is subjected to the greatest force at point B, resulting in stress concentration, which causes the weld to be torn, and the connecting bracket 1' fails in connection, thereby causing the bottom guard plate to break and fail, and cannot meet the requirements under wading conditions.

[0026] In order to improve the rigidity and connection strength of the connection bracket, in an exemplary embodiment of the present disclosure, Figures 3 to 7 As shown, a connecting bracket is provided, which has a first connecting section 11 for fixedly connecting to a battery pack, a second connecting section 12 for connecting to a bottom guard plate of a vehicle (not shown in the figure), and at least one intermediate section 13 arranged between the first connecting section 11 and the second connecting section 12. The side of the first connecting section 11 can be welded and fixed to the crossbeam 2 of the battery pack, and the second connecting section 12 is provided with a fastening hole 120. Fasteners connecting the connecting bracket and the bottom guard plate, such as bolts, can pass through the fastening hole 120. Of course, the connection method between the first connecting section 11 and the battery pack, and the connection method between the second connecting section 12 and the bottom guard plate are not limited to this, and can be designed as needed. In the connecting bracket, the structure of at least one intermediate section 13 is configured so that the force F acting vertically on the bottom surface of the connecting bracket can be evenly transmitted to the first connecting section 11 through the intermediate section 13. As shown Figure 4 and Figure 6As shown, the "uniform" here means that the force F acting vertically on the bottom surface of the connecting bracket is dispersed into multiple components pointing to the weld surface along the thickness direction from the installation point of the bottom guard plate, and stress concentration will not occur at a certain position of the weld. The number and structure of the middle section 13 are not limited, and the middle section 13 that can achieve the above effect is within the protection scope of the present disclosure. The "top" and "bottom" here are defined when the connecting bracket provided by the present disclosure is installed normally. For details, please refer to Figure 7 The directions of the drawings shown, "length direction", "width direction" and "thickness direction" can be referred to Figure 5 and Figure 7 Direction indicated by the arrow.

[0027] In an exemplary embodiment of the present disclosure, Figure 3 As shown, the connecting bracket 1" can be designed as a rectangular aluminum block (the first connecting section 11 and the second connecting section 12 are of equal thickness and the middle section 13 is designed to be of equal thickness to both) to replace the L-shaped connecting bracket 1'. Figure 4 As shown, the side of the rectangular connecting bracket 1" is fixedly connected to the crossbeam 2 of the battery pack by welding. Under wading conditions, the water load transmitted from the bottom guard plate mounting point of the second connecting section 12 can be evenly transmitted to the connecting weld through the solid rectangular block, and the vertical upward load can be evenly applied to the weld position. The connecting weld between the connecting bracket 1" and the battery pack crossbeam is evenly stressed, and there will be no problem of concentrated stress at the bottom of the weld. It has strong bending resistance and can effectively ensure the connection strength between the connecting bracket 1" and the battery pack.

[0028] In another exemplary embodiment of the present disclosure, Figure 5 and Figure 6 As shown, the first connecting section 11 and the second connecting section 12 can be designed with unequal thickness, and the middle section 13 is a transition connecting section between the first connecting section 11 and the second connecting section 12. When the bottom surface of the connecting bracket 1 is subjected to a vertical upward load, the force can also be evenly transmitted to the weld position. In other embodiments, the middle section 13 can also form a triangular support structure with the first connecting section 11 and the second connecting section 12, all of which belong to the protection scope of the present disclosure.

[0029] In the connecting bracket provided by the present invention, by setting at least one middle section 13 between the first connecting section 11 and the second connecting section 12 and by designing the structure of the middle section 13, the problem of stress concentration at the bottom of the weld of the connecting bracket 1 can be effectively solved, and the weld can be prevented from being torn, thereby ensuring the connection strength between the connecting bracket 1 and the bottom guard plate and the battery pack. At the same time, the structural strength of the connecting bracket 1 itself can be improved, thereby meeting the performance requirements of wading conditions and enhancing the ability to resist wading impact loads.

[0030] Taking weight and cost factors into consideration, in the present disclosure, in the thickness direction of the connecting bracket 1, the size of at least one middle section 13 gradually decreases along the direction from the first connecting section 11 to the second connecting section 12. Compared with the connecting bracket 1" of the rectangular block, a part of the middle section 13 is reduced, which can reduce the weight of the connecting bracket 1 and reduce the cost. At the same time, the retained middle section 13 also needs to play a role in uniformly transmitting force, so that the water load at the bottom guard plate installation point can be evenly transmitted to the weld position through the middle section 13. The force transmission path is clear and the structural design is reasonable, which can not only solve the problem of stiffness and strength of the connecting bracket weld, but also reduce the weight and cost of the connecting bracket.

[0031] like Figure 7 As shown, the thickness of the first connecting section 11 is H1, and the thickness of the second connecting section 12 is H2, wherein H1>H2, and 0.3≤(H1-H2) / H1≤0.5, H1 determines the length of the weld, and its size determines the connection strength between the connecting bracket 1 and the crossbeam 2 of the battery pack, and H2 determines the strength when connected to the bottom guard plate. If H2 is too large, the bolt stroke is long, and disassembly is time-consuming and laborious. If H2 is too small, the connection strength with the bottom guard plate is affected. The thickness of H1 and H2 can be designed as needed. In the length direction of the connecting bracket 1, the length of the first connecting section 11 is D1, the length of the second connecting section 12 is D2, and the length of at least one intermediate section 13 is D3, wherein D2>D1≥D3. D2 is the largest, which can ensure the contact area between the connecting bracket 1 and the bottom guard plate, and ensure the connection strength between the two. The lengths of D1 and D3 determine the force transmission path to ensure that the force can be evenly transmitted to the first connecting section 11 through the intermediate section 13.

[0032] like Figure 5 As shown, in the width direction of the connecting bracket 1, the size of the first connecting section 11 gradually increases in the direction away from the middle section 13. Both sides of the first connecting section 11 in the width direction can be designed as an expanded ear-shaped structure, which can increase the contact area between the connecting bracket 1 and the crossbeam 2 of the battery pack, thereby improving the welding strength between the two.

[0033] In the present disclosure, the bottom surface of the connecting bracket 1 is a plane, and at least one middle section 13 can be an inclined surface connecting the top surfaces of the first connecting section 11 and the second connecting section 12. In other embodiments, the bottom surface can be the same as the top surface, and the position of the middle section 13 is designed as a transition connecting section. Embodiments that do not affect the force transmission path all belong to the protection scope of the present disclosure.

[0034] In the connecting bracket provided in the present disclosure, a comparative analysis is conducted on its weight and weld stress conditions, as shown in the table below.

[0035] Attach the bracket Total weight / g Weld stress / MPa Bracket stress / MPa 1’ 110 239 309 1” 215 41.3 279 1 155 60.9 263

[0036] After comparative analysis, compared with the connecting bracket 1', the weld stress at the connecting bracket 1 and the connecting bracket 1" is significantly reduced, and the stress of the connecting bracket itself is also reduced. The weld stress of the connecting bracket 1 is reduced by 178.4MPa, and the stress of the connecting bracket itself is reduced by 46MPa, which can well solve the problem of stress concentration at the bottom of the weld. It has been verified that no failure problem occurred at the weld position of the connecting bracket 1, and the bottom guard plate structure is intact. In terms of weight, compared with the connecting bracket 1", the weight of the connecting bracket 1 is reduced by 60g, and accordingly, the cost will be significantly reduced. Taking into account factors such as weld stress, cost and weight, the connecting bracket 1 can meet the needs of wading conditions, while also meeting the requirements of weight and cost.

[0037] According to a second aspect of the present disclosure, a battery pack is provided, comprising a crossbeam 2 and a connecting bracket fixed on the crossbeam 2, wherein the connecting bracket may be the connecting bracket described above. The battery pack has all the beneficial effects of the connecting bracket described above, and no further elaboration is given here.

[0038] According to a third aspect of the present disclosure, a vehicle is provided, the vehicle comprising a battery pack and an underbody guard, the battery pack and the underbody guard being connected via the connection bracket described above. The vehicle has all the beneficial effects of the above connection bracket, which will not be described in detail here.

[0039] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0040] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although the specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and conducive to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0041] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0042] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0043] In the above detailed description, reference is made to the accompanying drawings, which illustrate specific aspects of the present disclosure that can be practiced by way of illustration. In this regard, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating directions or representing positional relationships, can be used with reference to the orientation of the described figures. Since the components of the described device can be positioned in a plurality of different orientations, directional terms can be used for illustrative purposes rather than restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. Therefore, the following detailed description should not be considered in a limiting sense.

[0044] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0045] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like used in the embodiments of the present disclosure should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0046] In addition, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may be used herein to indicate that the component, element or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements or layers are arranged between the surface and the component, element or material layer. However, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may also optionally have a specific meaning: the component, element or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, such as in direct contact with the surface.

[0047] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] It should be understood that spatially relative terms such as "above", "upper", "below", and "lower" are used herein to describe the relationship of one element to another element shown in the figures. In addition to the orientation depicted in the drawings, such spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" includes both upper and lower orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

Claims

1. A connecting bracket, characterized in that: The connecting bracket has a first connecting section for fixedly connecting to the battery pack, a second connecting section for connecting to the bottom guard plate of the vehicle, and at least one intermediate section arranged between the first connecting section and the second connecting section, wherein the structure of the at least one intermediate section is configured so that the force F acting vertically on the bottom surface of the connecting bracket can be evenly transmitted to the first connecting section through the intermediate section.

2. The connecting bracket according to claim 1, characterized in that: In the thickness direction of the connecting bracket, the size of the at least one middle section gradually decreases along the direction from the first connecting section to the second connecting section.

3. The connecting bracket according to claim 2, characterized in that: The thickness of the first connecting section is H1, and the thickness of the second connecting section is H2, wherein H1>H2, and 0.3≤ / H1≤0.

5.

4. The connecting bracket according to claim 1, characterized in that: In the length direction of the connecting bracket, the length of the first connecting segment is D1, the length of the second connecting segment is D2, and the length of the at least one intermediate segment is D3, wherein D2>D1≥D3.

5. The connecting bracket according to claim 1, characterized in that: In the width direction of the connecting bracket, the size of the first connecting section gradually increases in a direction away from the middle section.

6. The connecting bracket according to claim 1, characterized in that: The bottom surface of the connecting bracket is a plane, and the at least one middle section is an inclined surface connecting the top surfaces of the first connecting section and the second connecting section.

7. The connecting bracket according to claim 1, characterized in that: The side surface of the first connecting section is used for welding and fixing to the crossbeam of the battery pack.

8. The connecting bracket according to claim 1, characterized in that: The second connecting section is provided with a fastening hole, and the fastener connecting the connecting bracket and the bottom guard plate can pass through the fastening hole.

9. A battery pack, characterized in that: It comprises a crossbeam and a connecting bracket fixed on the crossbeam, and the connecting bracket is the connecting bracket described in any one of claims 1-8.

10. A vehicle, comprising a battery pack and an underbody guard, characterized in that: The battery pack and the bottom guard plate are connected via a connecting bracket according to any one of claims 1-8.

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