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

Abstract

The invention 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, and in particular to a power battery optical cover, a power battery cover assembly and a power battery. Background Art

[0002] Power batteries are storage batteries that provide power for electric vehicles, electric trains, electric bicycles, etc. As an important component of power batteries, the quality of the power battery cover 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 equipped 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 to achieve a sealed connection between the sealing pin and the light cover plate, thereby achieving the sealing of the liquid injection hole. However, this process will form a welding protrusion along the welding trajectory at the welding position during laser welding of the sealing pin and the light cover plate. Since the welding protrusion protrudes from the front of the light cover plate, it hinders the power battery film. Summary of the invention

[0004] The embodiment of the present application provides a power battery optical cover, a power battery cover assembly and a power battery to solve the problems existing in the related technologies. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a power battery optical cover plate, including:

[0006] A cover body, wherein the cover body has an injection hole and a first receiving hole, the injection hole is used to cooperate with a sealing pin, the first receiving hole is located on the front side of the cover body, the first receiving hole and the injection hole are arranged one by one from top to bottom along the cover body, the first receiving hole is arranged around the vertical center line of the injection hole, and the first receiving hole is used to accommodate a first welding protrusion formed after the sealing pin and the cover body are welded, so as to limit the first welding protrusion within the first receiving hole.

[0007] In one embodiment, the diameter of the first receiving hole is larger than the diameter of the injection hole.

[0008] In one embodiment, the injection hole and the sealing pin are gap-matched, and the gap between the injection hole and the sealing pin is covered by the first welding protrusion to seal the gap between the injection hole and the sealing pin.

[0009] In one embodiment, a depth of the first receiving hole is d1, and 0.15 mm ≤ d1 ≤ 0.25 mm.

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

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

[0012] In one embodiment, the cover body also has an explosion-proof hole and a second accommodating hole, the explosion-proof hole is used to cooperate with the explosion-proof valve, the explosion-proof hole and the second accommodating hole are arranged one by one from top to bottom along the cover body, the second accommodating hole is located on the reverse side of the cover body, the second accommodating hole is arranged around the explosion-proof hole, the second accommodating hole is used to accommodate a second welding protrusion formed after the explosion-proof valve and the cover body are welded, so as to limit the second welding protrusion within the second accommodating hole.

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

[0014] In one embodiment, the explosion-proof hole and the explosion-proof valve are gap-matched, 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.

[0015] In a second aspect, an embodiment of the present application provides a power battery cover assembly, including the above-mentioned power battery light cover.

[0016] In a third aspect, an embodiment of the present application provides a power battery, including the above-mentioned power battery optical cover.

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

[0018] The power battery optical cover of the present invention has a first receiving hole provided on the front side of the cover body, and the first receiving hole can be used to accommodate the first welding protrusion formed after the sealing nail and the cover body are welded, so that the first welding protrusion will not protrude from the front side of the cover body, thereby avoiding obstruction of the power battery film pasting and affecting the power battery film pasting process.

[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0021] Figure 1A top view of the power battery optical cover of the present invention;

[0022] Figure 2 A bottom view of the power battery optical cover of the present invention;

[0023] Figure 3 It is a cross-sectional view of the power battery optical cover plate of the present invention;

[0024] Figure 4 for Figure 3 A local enlarged view of point A in FIG.

[0025] Figure 5 for Figure 3 A local enlarged view of point B in FIG.

[0026] Figure 6 It is a cross-sectional view of the power battery bare cover plate, sealing nails and explosion-proof valve of the present invention assembled together;

[0027] Figure 7 for Figure 6 A local enlarged view of point C in FIG.

[0028] Figure 8 for Figure 6 A local enlarged view of point D in FIG.

[0029] Fig. 9 It is an exploded view of the power battery light cover plate, sealing nails and explosion-proof valve of the present invention.

[0030] Reference numerals

[0031] 1. Cover plate body; 11. Liquid injection hole; 12. First receiving hole; 13. Explosion-proof hole; 14. Second receiving hole; 2. Sealing nail; 3. Explosion-proof valve. DETAILED DESCRIPTION

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0033] See also Figure 1-Figure 9 In the first aspect, a preferred embodiment of the present invention provides a power battery optical cover, comprising:

[0034] The cover body 1 has a liquid injection hole 11 and a first receiving hole 12. The liquid injection hole 11 is used to cooperate with the sealing nail 2. The first receiving hole 12 is located on the front of the cover body 1. The first receiving hole 12 and the liquid injection hole 11 are arranged one by one from top to bottom along the cover body 1. The first receiving hole 12 is arranged around the vertical center line of the liquid injection hole 11. The first receiving hole 12 is used to accommodate a first welding protrusion formed after the sealing nail 2 and the cover body 1 are welded, so as to limit the first welding protrusion within the first receiving hole 12.

[0035] The power battery optical cover of the present invention, by setting the first receiving hole 12 on the front side of the cover body 1, can use the first receiving hole 12 to accommodate the first welding protrusion formed after the sealing nail 2 and the cover body 1 are welded, so that the first welding protrusion will not protrude from the front side of the cover body 1, thereby avoiding obstruction of the power battery film, so that the power battery film process will not be affected.

[0036] See also Figure 4 and Figure 7 In one embodiment, the aperture of the first receiving hole 12 is larger than the aperture of the injection hole 11, which facilitates welding of the sealing pin 2 and the cover plate body 1 and helps reduce the difficulty of welding the sealing pin 2 and the cover plate body 1. At the same time, without increasing the depth of the first receiving hole 12 too much, the space for accommodating the first welding protrusion can be expanded.

[0037] In one embodiment, the liquid injection hole 11 and the sealing pin 2 are clearance-matched to facilitate the insertion of the sealing pin 2 into the liquid injection hole 11, and the gap between the liquid injection hole 11 and the sealing pin 2 is covered by the first welding protrusion to seal the gap between the liquid injection hole 11 and the sealing pin 2, thereby achieving a gap between the sealing cover plate body 1 and the sealing pin 2.

[0038] In one embodiment, the depth of the first accommodating hole 12 is d1, 0.15mm≤d1≤0.25mm, and the first accommodating hole 12 within this depth size range can meet the requirement of accommodating the first welding protrusion, so that the first welding protrusion will not protrude from the front of the cover plate body 1. At the same time, the first accommodating hole 12 within this depth size range will not occupy too much space of the cover plate body 1, and there is no need to thicken the depth size of the cover plate body 1. At the same time, it will not affect the installation of the sealing nail 2.

[0039] In one embodiment, d1=0.2mm, and the first accommodating hole 12 within the depth dimension range can meet the requirement of accommodating the first welding protrusion, so that the first welding protrusion will not protrude from the front side of the cover plate body 1. At the same time, the first accommodating hole 12 within the depth dimension range will not occupy too much space of the cover plate body 1, and there is no need to thicken the depth dimension of the cover plate body 1. At the same time, it will not affect the installation of the sealing nail 2.

[0040] See also Figure 7In one embodiment, the diameter of the injection hole 11 gradually increases toward the front direction of the cover plate body 1, so that the insertion of the sealing nail 2 is smoother and more convenient, thereby improving the insertion efficiency of the sealing nail 2.

[0041] See also Figure 7 In one embodiment, a limiting boss is provided in the injection hole 11, and the limiting boss is used to limit the sealing pin 2 from leaving the injection hole 11 in a direction away from the front side of the cover body 1, that is, to limit the sealing pin 2 from moving toward the reverse side of the cover body 1, thereby ensuring that the sealing pin 2 is reliably installed in the injection hole 11.

[0042] In one embodiment, the cover body 1 further has an explosion-proof hole 13 and a second receiving 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 receiving hole 14 are arranged one by one from top to bottom along the cover body 1. The second receiving hole 14 is located on the reverse side of the cover body 1. The second receiving hole 14 is arranged around the explosion-proof hole 13. The second receiving hole 14 is used to accommodate the second welding protrusion formed after the explosion-proof valve 3 and the cover body 1 are welded, so as to limit the second welding protrusion in the second receiving hole 14. By arranging the second receiving hole 14 on the reverse side of the cover body 1, the second receiving hole 14 can be used to accommodate the second welding protrusion formed after the explosion-proof valve 3 and the cover body 1 are welded, so that the second welding protrusion will not protrude from the reverse side of the cover body 1, so that the reverse side of the cover body 1 is flat and has no rounded corners, which can effectively avoid the explosion holes, pinholes and other undesirable phenomena caused by welding the explosion-proof valve 3.

[0043] See also Figure 5 and Figure 8 In one embodiment, the aperture of the second accommodating hole 14 is larger than the aperture of the explosion-proof hole 13, which facilitates the welding of the explosion-proof valve 3 and the cover plate body 1, and helps to reduce the difficulty of welding the explosion-proof valve 3 and the cover plate body 1. At the same time, without increasing the depth of the second accommodating hole 14 too much, the space for accommodating the second welding protrusion can be expanded.

[0044] In one embodiment, the explosion-proof hole 13 and the explosion-proof valve 3 are gap-matched to facilitate the insertion of the explosion-proof valve 3 into the explosion-proof hole 13, and the gap between the explosion-proof hole 13 and the explosion-proof valve 3 is covered by a second welding protrusion to seal the gap between the explosion-proof hole 13 and the explosion-proof valve 3, thereby achieving a gap between the sealing cover plate body 1 and the explosion-proof valve 3.

[0045] In one embodiment, the depth of the second accommodating hole 14 is d2, 0.15mm≤d2≤0.25mm, and the second accommodating hole 14 within this depth size range can meet the requirement of accommodating the second welding protrusion, so that the second welding protrusion will not protrude from the back side of the cover plate body 1. At the same time, the second accommodating hole 14 within this depth size range will not occupy too much space of the cover plate body 1, and there is no need to thicken the depth size of the cover plate body 1. At the same time, it will not affect the installation of the explosion-proof valve 3.

[0046] In one embodiment, d2=0.2mm, and the second accommodating hole 14 within this depth size range can meet the requirement of accommodating the second welding protrusion, so that the second welding protrusion will not protrude from the back side of the cover plate body 1. At the same time, the second accommodating hole 14 within this depth size range will not occupy too much space of the cover plate body 1, and there is no need to thicken the depth size of the cover plate body 1. At the same time, it will not affect the installation of the sealing nail 2.

[0047] See also Figure 8 In one embodiment, a limiting boss is provided in the explosion-proof hole 13, and the limiting boss is used to limit the explosion-proof valve 3 from leaving the explosion-proof hole 13 in a direction away from the reverse side of the cover body 1, that is, to limit the movement of the explosion-proof valve 3 toward the front side of the cover body 1, thereby ensuring that the explosion-proof valve 3 is reliably installed in the explosion-proof hole 13.

[0048] In a second aspect, a preferred embodiment of the present invention provides a power battery cover assembly, including the above-mentioned power battery light cover.

[0049] The power battery cover assembly of the present invention adopts the above-mentioned power battery light cover. Similarly, based on the first receiving hole 12 being set on the front side of the cover body 1, the first receiving hole 12 can be used to accommodate the first welding protrusion formed after the sealing nail 2 and the cover body 1 are welded, so that the first welding protrusion will not protrude from the front side of the cover body 1, thereby avoiding obstruction of the power battery film and ensuring that the power battery film process is not affected.

[0050] In a third aspect, a preferred embodiment of the present invention provides a power battery, including the above-mentioned power battery optical cover.

[0051] The power battery of the present invention adopts the above-mentioned power battery light cover plate. Similarly, based on the first receiving hole 12 being set on the front side of the cover plate body 1, the first receiving hole 12 can be used to accommodate the first welding protrusion formed after the sealing nail 2 and the cover plate body 1 are welded, so that the first welding protrusion will not protrude from the front side of the cover plate body 1, thereby avoiding obstruction of the power battery film pasting and affecting the power battery film pasting process.

[0052] In the description of this specification, the description with reference to 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Power battery light cover, characterized in that: include: A cover body, wherein the cover body has an injection hole and a first receiving hole, the injection hole is used to cooperate with a sealing pin, the first receiving hole is located on the front side of the cover body, the first receiving hole and the injection hole are arranged one by one from top to bottom along the cover body, the first receiving hole is arranged around the vertical center line of the injection hole, and the first receiving hole is used to accommodate a first welding protrusion formed after the sealing pin and the cover body are welded, so as to limit the first welding protrusion within the first receiving hole.

2. The power battery optical cover according to claim 1, characterized in that: The diameter of the first receiving hole is larger than the diameter of the injection hole.

3. The power battery optical cover plate according to claim 1, characterized in that: The injection hole and the sealing pin are gap-matched, and the gap between the injection hole and the sealing pin is covered by the first welding protrusion to seal the gap between the injection hole and the sealing pin.

4. The power battery optical cover according to claim 1, characterized in that: The depth of the first receiving hole is d1, 0.15 mm≤d1≤0.25 mm.

5. The power battery optical cover plate according to claim 1, characterized in that: The diameter of the injection hole gradually increases toward the front direction of the cover plate body.

6. The power battery optical cover according to any one of claims 1 to 5, characterized in that: The cover body also has an explosion-proof hole and a second accommodating hole. The explosion-proof hole is used to cooperate with the explosion-proof valve. The explosion-proof hole and the second accommodating hole are arranged one by one from top to bottom along the cover body. The second accommodating hole is located on the reverse side of the cover body. The second accommodating hole is arranged around the explosion-proof hole. The second accommodating hole is used to accommodate a second welding protrusion formed after the explosion-proof valve and the cover body are welded, so as to confine the second welding protrusion within the second accommodating hole.

7. The power battery optical cover plate according to claim 6, characterized in that: The aperture of the second accommodating hole is larger than the aperture of the explosion-proof hole.

8. The power battery optical cover plate according to claim 6, characterized in that: The explosion-proof hole and the explosion-proof valve are gap-matched, 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.

9. A power battery cover assembly, characterized in that: A power battery optical cover plate comprising any one of claims 1-8.

10. A power battery, characterized in that: A power battery optical cover plate comprising any one of claims 1-8.

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