Power battery light cover plate, power battery cover plate assembly and power battery

Abstract

The utility model provides a power battery light cover plate, a power battery cover plate assembly and a power battery, the power battery light cover plate comprises a cover plate main body, the cover plate main body is provided with a liquid injection hole and a first accommodating hole, the liquid injection hole is used for cooperating with a sealing nail, the first accommodating hole is located in the front surface of the cover plate main body, and the first accommodating hole and the liquid injection hole are arranged one by one from top to bottom along the cover plate main body; the first containing hole is formed around the vertical center line of the liquid injection hole and used for containing a first welding protrusion formed after the sealing nail and the cover plate body are welded so that the first welding protrusion can be limited in the first containing hole. According to the light cover plate for the power battery, the first accommodating hole is formed in the front surface of the cover plate main body, and the first welding bulge formed after the sealing nail and the cover plate main body are welded can be accommodated in the first accommodating hole, so that the first welding bulge does not protrude out of the front surface of the cover plate main body, and film pasting of the power battery is prevented from being hindered; and the film pasting process of the power battery is not influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a power battery light cover plate, a power battery cover plate assembly and a power battery. BACKGROUND

[0002] A power battery is a storage battery for providing power for electric vehicles, electric trains, electric bicycles and the like. As an important component of a power battery, the quality of a power battery cover plate assembly directly affects the working performance of the power battery.

[0003] At present, the light cover plate in the power battery cover plate assembly on the market is generally provided with a liquid injection hole and a sealing pin. The sealing pin is inserted into the liquid injection hole, and the sealing pin and the light cover plate are connected together through a laser welding process, so as to realize the sealing connection of the sealing pin and the light cover plate, thereby realizing the sealing of the liquid injection hole. However, when the sealing pin and the light cover plate are laser welded, a welding protrusion will be formed along the welding track at the welding position. Since the welding protrusion will protrude from the front surface of the light cover plate, it will hinder the film pasting of the power battery. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a power battery light cover plate, a power battery cover plate assembly and a power battery to solve the problems in the related art. The technical solutions are as follows:

[0005] In a first aspect, the embodiments of the present application provide a power battery light cover plate, comprising:

[0006] A cover plate body has a liquid injection hole and a first accommodating hole. The liquid injection hole is used in cooperation with a sealing pin. The first accommodating hole is located on the front surface of the cover plate body. The first accommodating hole and the liquid injection hole are arranged one by one from top to bottom along the cover plate body. The first accommodating hole is arranged around the vertical center line of the liquid injection hole. The first accommodating hole is used to accommodate a first welding protrusion formed after the sealing pin and the cover plate body are welded, so as to limit the first welding protrusion in the first accommodating hole.

[0007] In an embodiment, the hole diameter of the first accommodating hole is greater than the hole diameter of the liquid injection hole.

[0008] In an embodiment, the liquid injection hole and the sealing pin are gap-fitted, and the gap between the liquid injection hole and the sealing pin is covered by the first welding protrusion, so as to seal the gap between the liquid injection hole and the sealing pin.

[0009] In an embodiment, the depth of the first accommodating hole is d1, and 0.15mm≤d1≤0.25mm.

[0010] In an embodiment, d1=0.2mm.

[0011] In one embodiment, the diameter of the injection hole gradually increases towards the front surface of the cover plate body.

[0012] In one embodiment, the cover plate body further comprises an explosion-proof hole and a second accommodating hole, the explosion-proof hole is used to cooperate with an explosion-proof valve, the explosion-proof hole and the second accommodating hole are arranged one by one from top to bottom along the cover plate body, the second accommodating hole is located at the back surface of the cover plate body, the second accommodating hole is arranged around the explosion-proof hole, and the second accommodating hole is used to accommodate a second welding protrusion formed after the explosion-proof valve and the cover plate body are welded, so as to limit the second welding protrusion in the second accommodating hole.

[0013] In one embodiment, the diameter of the second accommodating hole is greater than the diameter of the explosion-proof hole.

[0014] In one embodiment, the explosion-proof hole and the explosion-proof valve are clearance fit, and the gap between the explosion-proof hole and the explosion-proof valve is covered by the second welding protrusion, so as to seal the gap between the explosion-proof hole and the explosion-proof valve.

[0015] In a second aspect, the embodiments of the present application provide a power battery cover plate assembly comprising the power battery light cover plate.

[0016] In a third aspect, the embodiments of the present application provide a power battery comprising the power battery light cover plate.

[0017] The advantages or beneficial effects of the above technical solutions at least include:

[0018] The power battery light cover plate can accommodate the sealing nail and the first welding protrusion formed after the cover plate body and the sealing nail are welded by using the first accommodating hole, so that the first welding protrusion does not protrude from the front surface of the cover plate body, thereby avoiding hindering the power battery film pasting, and the power battery film pasting process is not affected.

[0019] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above-described exemplary aspects, embodiments and features, further aspects, embodiments and features of the present application will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In the drawings, like reference numerals refer to same or similar components throughout the several views. These drawings are not necessarily to scale. It should be understood that these drawings only depict some embodiments in accordance with the disclosure and should not be considered to be limiting of the scope of the disclosure.

[0021] Figure 1 is a top view of the power battery light cover plate of the utility model;

[0022] Figure 2 is a bottom view of the power battery light cover plate of the utility model;

[0023] Figure 3 is a sectional view of the power battery light cover plate of the utility model;

[0024] Figure 4 is Figure 3 is a partial enlarged view of A in

[0025] Figure 5 is Figure 3 is a partial enlarged view of B in

[0026] Figure 6 is a sectional view of the power battery light cover plate, the sealing nail and the explosion-proof valve assembled together of the utility model;

[0027] Figure 7 is Figure 6 is a partial enlarged view of C in

[0028] Figure 8 is Figure 6 is a partial enlarged view of D in

[0029] Figure 9 is an exploded view of the power battery light cover plate, the sealing nail and the explosion-proof valve of the utility model.

[0030] Reference signs

[0031] 1, cover plate main body; 11, liquid injection hole; 12, first accommodating hole; 13, explosion-proof hole; 14, second accommodating hole; 2, sealing nail; 3, explosion-proof valve. DETAILED DESCRIPTION

[0032] In the following, only certain example embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0033] Referring to Figures 1-9 , in a first aspect, the utility model a preferable implementation mode provides a kind of power battery light cover plate, including:

[0034] The cover plate body 1 has a liquid injection hole 11 for cooperating with the sealing nail 2 and a first accommodating hole 12 located on the front face of the cover plate body 1, the first accommodating hole 12 and the liquid injection hole 11 are sequentially arranged from top to bottom along the cover plate body 1, the first accommodating hole 12 is arranged around the vertical center line of the liquid injection hole 11, and the first accommodating hole 12 is used for accommodating the first welding protrusion formed after the sealing nail 2 and the cover plate body 1 are welded to limit the first welding protrusion in the first accommodating hole 12.

[0035] The power battery light cover plate has the first accommodating hole 12 arranged on the front face of the cover plate body 1, the first accommodating hole 12 is used for accommodating the first welding protrusion formed after the sealing nail 2 and the cover plate body 1 are welded, the first welding protrusion does not protrude from the front face of the cover plate body 1, and therefore, the power battery film pasting is not hindered, and the power battery film pasting process is not affected.

[0036] Referring to Figure 4 and Figure 7 In an embodiment, the first accommodating hole 12 has a hole diameter larger than that of the liquid injection hole 11, so that the sealing nail 2 and the cover plate body 1 are conveniently welded, the welding difficulty of the sealing nail 2 and the cover plate body 1 is reduced, and meanwhile, the space for accommodating the first welding protrusion can be enlarged without excessively increasing the depth size of the first accommodating hole 12.

[0037] In an embodiment, the liquid injection hole 11 and the sealing nail 2 are in clearance fit, so that the sealing nail 2 is conveniently inserted into the liquid injection hole 11, and the clearance between the liquid injection hole 11 and the sealing nail 2 is covered by the first welding protrusion, so as to seal the clearance between the liquid injection hole 11 and the sealing nail 2, thereby realizing sealing of the clearance between the cover plate body 1 and the sealing nail 2.

[0038] In an embodiment, the first accommodating hole 12 has a depth d1 of 0.15mm≤d1≤0.25mm, the first accommodating hole 12 in the depth size range can meet the requirement of accommodating the first welding protrusion, so that the first welding protrusion does not protrude from the front face of the cover plate body 1, meanwhile, the first accommodating hole 12 in the depth size range does not excessively occupy the space of the cover plate body 1, the depth size of the cover plate body 1 does not need to be thickened, and meanwhile, the installation of the sealing nail 2 is not affected.

[0039] In an embodiment, d1=0.2mm, the first accommodating hole 12 in the depth size range can meet the requirement of accommodating the first welding protrusion, so that the first welding protrusion does not protrude from the front face of the cover plate body 1, meanwhile, the first accommodating hole 12 in the depth size range does not excessively occupy the space of the cover plate body 1, the depth size of the cover plate body 1 does not need to be thickened, and meanwhile, the installation of the sealing nail 2 is not affected.

[0040] Referring to Figure 7In an embodiment, the hole diameter of the liquid injection hole 11 gradually increases towards the front surface of the cover plate body 1, which makes the insertion of the sealing pin 2 more smooth and convenient, and improves the insertion efficiency of the sealing pin 2.

[0041] Referring to Figure 7 In an embodiment, a limiting boss is arranged in the liquid injection hole 11, which is used to limit the sealing pin 2 from moving away from the front surface of the cover plate body 1, i.e., to limit the sealing pin 2 from moving towards the back surface of the cover plate body 1, so as to ensure that the sealing pin 2 is reliably arranged in the liquid injection hole 11.

[0042] In an embodiment, the cover plate body 1 further has an explosion-proof hole 13 and a second accommodating hole 14. The explosion-proof hole 13 is used to cooperate with the explosion-proof valve 3. The explosion-proof hole 13 and the second accommodating hole 14 are arranged one after another from top to bottom along the cover plate body 1. The second accommodating hole 14 is located at the back surface of the cover plate body 1. The second accommodating hole 14 is arranged around the explosion-proof hole 13. The second accommodating hole 14 is used to accommodate the second welding protrusion formed after the explosion-proof valve 3 and the cover plate body 1 are welded, so as to limit the second welding protrusion in the second accommodating hole 14. By arranging the second accommodating hole 14 at the back surface of the cover plate body 1, the second welding protrusion formed after the explosion-proof valve 3 and the cover plate body 1 are welded can be accommodated by the second accommodating hole 14, so that the second welding protrusion does not protrude from the back surface of the cover plate body 1. The back surface of the cover plate body 1 is flat without a round corner, which can effectively avoid the explosion hole, pinhole and other adverse phenomena caused by welding the explosion-proof valve 3.

[0043] Referring to Figure 5 and Figure 8 In an embodiment, the hole diameter of the second accommodating hole 14 is greater than the hole diameter of the explosion-proof hole 13, which facilitates the welding of the explosion-proof valve 3 and the cover plate body 1, and is conducive to reducing the welding difficulty of the explosion-proof valve 3 and the cover plate body 1. Meanwhile, without excessively increasing the depth dimension of the second accommodating hole 14, the space for accommodating the second welding protrusion can be expanded.

[0044] In an embodiment, the explosion-proof hole 13 and the explosion-proof valve 3 are gap-fitted, so as to facilitate the insertion of the explosion-proof valve 3 into the explosion-proof hole 13. The gap between the explosion-proof hole 13 and the explosion-proof valve 3 is covered by the second welding protrusion, so as to seal the gap between the explosion-proof hole 13 and the explosion-proof valve 3, thereby realizing the sealing of the gap between the cover plate body 1 and the explosion-proof valve 3.

[0045] In an embodiment, the depth of the second accommodating hole 14 is d2, and 0.15mm≤d2≤0.25mm. The second accommodating hole 14 within the depth dimension range can meet the requirement of accommodating the second welding protrusion, so that the second welding protrusion does not protrude from the back surface of the cover plate body 1. Meanwhile, the second accommodating hole 14 within the depth dimension range does not excessively occupy the space of the cover plate body 1, and does not need to thicken the depth dimension of the cover plate body 1. Meanwhile, the second accommodating hole 14 within the depth dimension range does not affect the installation of the explosion-proof valve 3.

[0046] In an embodiment, d2=0.2mm, the second accommodating hole 14 in the depth size range can meet the requirement of accommodating the second welding protrusion, so that the second welding protrusion does not protrude from the back surface of the cover plate body 1, meanwhile, the second accommodating hole 14 in the depth size range does not occupy too much space of the cover plate body 1, so that the depth size of the cover plate body 1 does not need to be thickened, and meanwhile, the installation of the sealing nail 2 is not affected.

[0047] Referring to Figure 8 In an embodiment, the explosion-proof hole 13 is provided with a limiting boss, the limiting boss is used for limiting the explosion-proof valve 3 from the direction away from the back surface of the cover plate body 1 to escape from the explosion-proof hole 13, that is, limiting the explosion-proof valve 3 to move in the direction of the front surface of the cover plate body 1, and ensuring that the explosion-proof valve 3 can be reliably installed in the explosion-proof hole 13.

[0048] In a third aspect, a preferred embodiment of the utility model provides a power battery cover plate assembly, comprising the power battery light cover plate.

[0049] The power battery cover plate assembly of the utility model, since the power battery light cover plate is used, the first accommodating hole 12 is arranged on the front surface of the cover plate body 1, the first welding protrusion formed after the sealing nail 2 and the cover plate body 1 are welded can be accommodated by the first accommodating hole 12, so that the first welding protrusion does not protrude from the front surface of the cover plate body 1, thereby avoiding hindering the power battery film pasting, and the power battery film pasting process is not affected.

[0050] In a third aspect, a preferred embodiment of the utility model provides a power battery, comprising the power battery light cover plate.

[0051] The power battery of the utility model, since the power battery light cover plate is used, the first accommodating hole 12 is arranged on the front surface of the cover plate body 1, the first welding protrusion formed after the sealing nail 2 and the cover plate body 1 are welded can be accommodated by the first accommodating hole 12, so that the first welding protrusion does not protrude from the front surface of the cover plate body 1, thereby avoiding hindering the power battery film pasting, and the power battery film pasting process is not affected.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0053] Furthermore, the terms "first", "second", etc. are used only for the purpose of description and do not imply or imply relative importance or a quantity of the technical features indicated. Thus, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0054] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power cell light cover, characterized in that, The cover plate body has a liquid injection hole for cooperating with a sealing spike and a first accommodating hole located on the front face of the cover plate body, the first accommodating hole and the liquid injection hole are arranged one by one from top to bottom along the cover plate body, the first accommodating hole is arranged around the vertical center line of the liquid injection hole, and the first accommodating hole is used for accommodating the sealing spike and a first welding protrusion formed after the cover plate body is welded, so as to limit the first welding protrusion in the first accommodating hole. The first accommodating hole has a hole diameter larger than that of the liquid injection hole.

2. The power cell light cover plate of claim 1, wherein, The liquid injection hole and the sealing spike are gap-fitted, and the gap between the liquid injection hole and the sealing spike is covered by the first welding protrusion to seal the gap between the liquid injection hole and the sealing spike.

3. The power cell light cover plate of claim 1, wherein, The first accommodating hole has a depth d1, and 0.15 mm≤d1≤0.25 mm.

4. The power cell light cover plate of claim 1, wherein, The hole diameter of the liquid injection hole gradually increases towards the direction close to the front face of the cover plate body.

5. The power cell light cover plate of claim 1, wherein, The cover plate body further has an explosion-proof hole for cooperating with an explosion-proof valve and a second accommodating hole, the explosion-proof hole and the second accommodating hole are arranged one by one from top to bottom along the cover plate body, the second accommodating hole is located on the back face of the cover plate body, the second accommodating hole is arranged around the explosion-proof hole, and the second accommodating hole is used for accommodating the explosion-proof valve and a second welding protrusion formed after the cover plate body is welded, so as to limit the second welding protrusion in the second accommodating hole.

6. The power cell light cover of any one of claims 1-5, wherein, The second accommodating hole has a hole diameter larger than that of the explosion-proof hole.

7. The power cell light cover plate of claim 6, wherein, The explosion-proof hole and the explosion-proof valve are gap-fitted, and the gap between the explosion-proof hole and the explosion-proof valve is covered by the second welding protrusion to seal the gap between the explosion-proof hole and the explosion-proof valve.

8. The power cell light cover plate of claim 6, wherein, The power battery light cover plate comprises the power battery light cover plate according to any one of claims 1-8.

9. A power cell cover plate assembly, characterized by, The power battery light cover plate comprises the power battery light cover plate according to any one of claims 1-8.

10. A power cell, characterized by ​

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