Connecting piece, battery pack and automobile

Abstract

The utility model relates to a connecting piece, which is used for connecting a liquid cooling plate and a supporting beam and comprises a first plate-shaped structure, a second plate-shaped structure, a third plate-shaped structure and a fourth plate-shaped structure, the buffer layer is arranged on the first plate-shaped structure, the buffer layer at least exposes the first threaded hole, and a second through hole is formed in the position, corresponding to the first through hole, of the buffer layer; the second plate-shaped structure is arranged on the buffer layer, the second plate-shaped structure extends in the direction close to the first plate-shaped structure to form a columnar structure, the columnar structure is embedded in the second through hole, and a gap is formed between the columnar structure and the first plate-shaped structure; a second threaded hole is formed in the position, corresponding to the columnar structure, of the second plate-shaped structure in a penetrating mode. According to the connecting piece, the first plate-shaped structure and the second plate-shaped structure are connected through the buffer layer, so that vibration impact is effectively absorbed, and the risk of bolt overload, loosening or breakage possibly caused by rigid constraint is avoided.

Description

Technical Field

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

[0002] In the electric vehicle sector, liquid cold plates are key components of thermal management systems. Their primary function is to cool battery cells when their temperature exceeds a set threshold, thereby ensuring battery performance and lifespan. Currently, most liquid cold plates on the market utilize profiled plate designs. These not only bear the weight of the battery cells but also transfer this weight to the chassis through bolted connections between the cold plate's flange and the chassis support beams.

[0003] In the conventional installation method of the liquid cooling plate in the box, the module is mounted on the liquid cooling plate, and the liquid cooling plate flange is directly connected to the support beam. It is then locked to the support beam with several bolts to form a rigid constraint. This design performs well under static loads, but under dynamic conditions, especially when the vehicle is in motion, the vibration and impact caused by uneven road conditions will cause the acceleration of the box to be transmitted to the liquid cooling plate through the support beam and bolts, causing additional stress on the liquid cooling plate. Especially when the battery cell is heavy (such as 500kg), the displacement response of the liquid cooling plate will lag behind the acceleration, resulting in large tensile or shear forces, causing the bolts to bear extremely high loads, resulting in loosening or breakage.

[0004] This patent improves the reliability and durability of the battery pack by improving the connection method between the liquid cooling plate and the box support beam. Utility Model Content

[0005] The purpose of the present invention is to provide a connector, a battery pack, and a car in response to the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The first aspect of the present invention is to provide a connector for connecting a liquid cooling plate and a support beam, comprising:

[0008] A first plate-like structure, wherein first threaded holes and first through holes are alternately formed on the first plate-like structure;

[0009] a buffer layer, the buffer layer being disposed on the first plate-like structure, the buffer layer exposing at least the first threaded hole, and the buffer layer having a second through hole formed at a position corresponding to the first through hole; and

[0010] A second plate-like structure, wherein the second plate-like structure is arranged on the buffer layer, the second plate-like structure extends toward the direction close to the first plate-like structure to form a columnar structure, the columnar structure is embedded in the second through hole, and there is a gap between the columnar structure and the first plate-like structure, and the second plate structure is provided with a second threaded hole at the position of the columnar structure.

[0011] Preferably, the diameter of the first threaded hole is smaller than the diameter of the first through hole.

[0012] Preferably, the buffer layer is made of elastic material.

[0013] Preferably, the elastic material is EPDM rubber.

[0014] Preferably, the aperture of the first through hole is larger than the aperture of the second through hole.

[0015] Preferably, the first through hole, the second through hole, and the second threaded hole are coaxially arranged.

[0016] A second aspect of the present invention is to provide a battery pack, comprising:

[0017] at least two supporting beams arranged side by side;

[0018] a liquid cooling plate fixed above the support beam; and

[0019] A battery module, the battery module being fixed above the liquid cooling plate;

[0020] Wherein, the support beam and the liquid cooling plate are fixed via the connecting piece as mentioned above.

[0021] Preferably, the first bolt sequentially passes through the third threaded hole and the second threaded hole on the flange surface of the liquid cooling plate to fix the liquid cooling plate and the connecting member; the second bolt sequentially passes through the first threaded hole and the fourth threaded hole reserved on the support beam to fix the connecting member and the support beam.

[0022] The third aspect of the present invention is to provide a car, comprising: the battery pack as described above.

[0023] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0024] In the connecting piece of the utility model, the first plate-like structure is connected to the support beam, the second plate-like structure is connected to the liquid cooling plate, and the first plate-like structure and the second plate-like structure are connected by a buffer layer, thereby effectively absorbing vibration impact and avoiding the risk of bolt overload, loosening, or breakage caused by rigid constraints; the gap between the columnar structure and the first plate-like structure can avoid sudden strain changes in the buffer layer, and the first through hole can avoid possible collisions between the columnar structure and the second plate-like structure, thereby improving the stability of the connecting piece; at the same time, the structure of the connecting piece is simple and can adapt to various forms of liquid cooling plates and support beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an isometric structural diagram of the connecting member in Example 1 of the present utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the connecting member in Example 1 of the present utility model;

[0027] Figure 3 This is a bottom view of the structure of the connecting member in Example 1 of the present utility model;

[0028] Figure 4 This is an isometric structural diagram of the battery pack in Example 2 of the present utility model;

[0029] Figure 5 This is a schematic diagram of the right side structure of the battery pack in Example 2 of the present utility model;

[0030] The reference numerals include:

[0031] First plate-like structure 1; first threaded hole 11; first through hole 12; buffer layer 2; second through hole 21; second plate-like structure 3; columnar structure 31; second threaded hole 311; support beam 4; liquid cooling plate 5; battery module 6; gap H. DETAILED DESCRIPTION

[0032] The specific implementation of the present utility model will be described in detail below.

[0033] Unless otherwise defined, the technical or scientific terms used in the claims and the specification shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0034] The words "include" or similar used in the description and claims of this utility model patent application mean that the items before "include" include the items listed after "include" or their equivalents, and do not exclude other items.

[0035] The numerical values ​​mentioned in the present invention include all numerical values ​​that increase by one unit from the lowest to the highest, assuming that there are at least two units between any lower value and the higher value. For example, if a component or a physical quantity is said to be from 1 to 100, preferably from 10 to 90, and most preferably from 20 to 80, it is intended to express that values ​​such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, and 41 to 49 are clearly listed in this specification; for values ​​less than 1, 0.0001, 0.001, 0.01, or 0.1 are considered to be more appropriate units. The above examples are for illustrative purposes only. In fact, all numerical combinations between the lowest value and the highest value listed are considered to be clearly listed in this specification in a similar manner.

[0036] Example 1

[0037] like Figure 1-3 As shown, this embodiment provides a connector for connecting a liquid cooling plate and a support beam, comprising:

[0038] A first plate-like structure 1, wherein first threaded holes 11 and first through holes 12 are alternately formed therethrough, and the diameter of the first through holes 12 is larger than the diameter of the first threaded holes 11;

[0039] A buffer layer 2 is provided on the first plate-like structure 1. As shown in the figure, the first plate-like structure 1 is divided into a first area and a second area. The first area is composed of an imaginary square with the center of the first threaded hole 11 as the center and the width of the first plate-like structure as the side length. The buffer layer 2 covers the second area. It is obvious that the buffer layer exposes the first threaded hole 11. The buffer layer 2 has a second through hole 21 at a position corresponding to the first through hole 12. The aperture of the second through hole 21 is slightly smaller than that of the first through hole 12; and

[0040] The second plate-like structure 3 is arranged on the buffer layer 2, and the second plate-like structure 3 extends toward the direction close to the first plate-like structure 1 to form a columnar structure 31. The columnar structure 31 is embedded in the second through hole 21, and there is a gap H between the columnar structure 31 and the first plate-like structure 1. The second plate-like structure 3 is provided with a second threaded hole 311 at the position of the columnar structure 31. The second threaded hole 311, the second through hole 21, and the first through hole 12 are coaxially arranged.

[0041] In a preferred embodiment, three first threaded holes 11 and two first through holes 12 are provided on the first plate-like structure 1, and the three first threaded holes 11 and the two first through holes 12 are arranged alternately, that is, the first plate-like structure 1 is provided with a first threaded hole 11, a first through hole 12, a first threaded hole 11, a first through hole 12, and a first threaded hole 11 in sequence; each of the first threaded holes 11 corresponds to a first area, and the remaining (discontinuous) areas are regarded as two second areas; each of the second areas is provided with a buffer layer 2, and each buffer layer 2 is provided with a second plate-like structure 3, that is, two buffer layers 2 and two second plate structures 3 are provided on the first plate-like structure 1.

[0042] It is obvious that those skilled in the art can easily list other embodiments, for example: four first threaded holes 11 and three first through holes 12 are alternately provided on the first plate-like structure 1, so that three buffer layers 2 and three second plate-like structures 3 are provided on the first plate-like structure 1; these embodiments should be deemed to be included in the protection scope of the aforementioned connecting member.

[0043] In a preferred embodiment, the buffer layer 2 is made of elastic material.

[0044] In a more preferred embodiment, the buffer layer 2 is made of rubber.

[0045] In a most preferred embodiment, the buffer layer 2 is made of EPDM rubber. The typical elastic modulus of EPDM rubber is 7.8 MPa, which is much smaller than the typical elastic modulus of steel material 210000 MPa. Therefore, in the case of external vibration impact, EPDM rubber can allow relative displacement between the first plate structure 1 and the second plate structure 3, thereby avoiding the risk of bolt overload, loosening, or breakage that may be caused by rigid constraints.

[0046] Example 2

[0047] like Figure 4-5 As shown, this embodiment provides a battery pack, including:

[0048] at least two supporting beams 4 arranged side by side;

[0049] a liquid cooling plate 5 , the liquid cooling plate 5 being fixed above the support beam 4 ; and

[0050] A battery module 6, the battery module 6 is fixed above the liquid cooling plate 5;

[0051] In which, the support beam 4 and the liquid cooling plate 5 are fixed by a connecting piece as described in Example 1: the first bolt sequentially penetrates the third threaded hole and the second threaded hole 311 on the flange surface of the liquid cooling plate 5 to fix the liquid cooling plate 5 and the connecting piece, and the second bolt sequentially penetrates the first threaded hole 11 and the fourth threaded hole reserved on the support beam 4 to fix the connecting piece and the support beam 4, so that the support beam 4 and the liquid cooling plate 5 are fixed by the connecting piece.

[0052] Example 3

[0053] This embodiment provides a car, including: the battery pack as described in Example 2.

[0054] To sum up, in the connecting piece of the utility model, the first plate-like structure is connected to the support beam, the second plate-like structure is connected to the liquid cooling plate, and the first plate-like structure and the second plate-like structure are connected by a buffer layer, thereby effectively absorbing vibration impact and avoiding the risk of bolt overload, loosening, or breakage caused by rigid constraints; the gap between the columnar structure and the first plate-like structure can avoid sudden strain changes in the buffer layer, and the first through hole can avoid possible collisions between the columnar structure and the second plate-like structure, thereby improving the stability of the connecting piece; at the same time, the structure of the connecting piece is simple and can adapt to various forms of liquid cooling plates and support beams.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A connector for connecting a liquid cooling plate and a support beam, characterized in that: include: A first plate-like structure (1), wherein first threaded holes (11) and first through holes (12) are alternately formed on the first plate-like structure (1); a buffer layer (2), the buffer layer (2) being arranged on the first plate-like structure (1), the buffer layer (2) exposing at least the first threaded hole (11), and the buffer layer (2) being provided with a second through hole (21) at a position corresponding to the first through hole (12); and A second plate-like structure (3), wherein the second plate-like structure (3) is arranged on the buffer layer (2), the second plate-like structure (3) extends in a direction close to the first plate-like structure (1) to form a columnar structure (31), the columnar structure (31) is embedded in the second through hole (21), a gap (H) is provided between the columnar structure (31) and the first plate-like structure (1), and the second plate-like structure (3) is provided with a second threaded hole (311) through-through at the position of the columnar structure (31).

2. The connector according to claim 1, wherein: The diameter of the first threaded hole (11) is smaller than the diameter of the first through hole (12).

3. The connector according to claim 1, wherein: The buffer layer (2) is made of elastic material.

4. The connector according to claim 3, wherein: The elastic material is EPDM rubber.

5. The connector according to claim 1, wherein: The aperture of the first through hole (12) is larger than the aperture of the second through hole (21).

6. The connector according to claim 1 or 5, characterized in that: The first through hole (12), the second through hole (21), and the second threaded hole (311) are coaxially arranged.

7. A battery pack, characterized in that: include: at least two supporting beams (4) arranged side by side; a liquid cooling plate (5), the liquid cooling plate (5) being fixed above the support beam (4); as well as A battery module (6), wherein the battery module (6) is fixed above the liquid cooling plate (5); Wherein, the support beam (4) and the liquid cooling plate (5) are fixed via a connecting piece according to any one of claims 1 to 6.

8. The battery pack according to claim 7, characterized in that: The first bolt sequentially penetrates the third threaded hole and the second threaded hole (311) on the flange surface of the liquid cooling plate (5) to fix the liquid cooling plate (5) and the connecting piece; the second bolt sequentially penetrates the first threaded hole (11) and the fourth threaded hole reserved on the support beam (4) to fix the connecting piece and the support beam (4).

9. An automobile, characterized in that: include: A battery pack according to any one of claims 7 to 8.

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