Battery top cover patch assembly structure

Abstract

The utility model relates to the technical field of battery patches, and discloses a battery top cover patch assembly structure which comprises a battery shell, a top cover plate and a cover plate patch, an installation opening is formed in the upper side of the battery shell, and the top cover plate is clamped and installed in the installation opening of the battery shell. An annular concave area is formed between the periphery of the top cover plate and the inner wall of the battery shell, welding flux is welded in the annular concave area, so that the top cover plate and the battery shell are fixed, and glue liquid is coated in the annular concave area and on the upper surface of the top cover plate and is used for sticking a cover plate patch. According to the structure, the annular concave area is arranged between the periphery of the top cover plate and the inner wall of the battery shell, so that welding flux is conveniently welded to the top cover plate in the annular concave area, the situation that the welding position is uneven and the pasting flatness of the cover plate patch is affected is avoided, glue liquid is conveniently smeared in the annular concave area, the periphery of the cover plate patch is pasted more firmly, and the service life of the battery is prolonged. Therefore, the pasting operation of the cover plate paster is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of battery patch technology, specifically a battery top cover patch assembly structure. Background Technology

[0002] After battery assembly, a protective film is usually wrapped around its outer surface. This film serves two purposes: firstly, it provides insulation to prevent short circuits between the metal casing and external wiring; secondly, it protects the metal casing from wear and scratches. Furthermore, because the battery top cover needs to have terminals, the protective film cannot completely cover it. Therefore, a top cover patch is usually attached to the top cover, serving the same function as the protective film—insulation and protection.

[0003] In the prior art, patent document CN213278202U discloses a power battery top cover patch assembly structure, including a housing, a top cover plate disposed on the top of the housing, a protective film disposed around the perimeter of the housing, and a top cover patch attached to the top cover plate. The top cover patch has skirts extending towards the bottom of the housing around its perimeter, and the skirts extend downwards beyond the top of the protective film. The top of the housing is fitted into the cavity formed by the top cover patch and the skirts. The inner surfaces of both the top cover patch and the skirts are provided with an adhesive layer. By providing skirts on the top cover patch, the problem of existing top cover patches lifting or detaching, which affects the quality and aesthetics of the battery cell, is significantly improved. At the same time, the probability of battery cell safety hazards due to damage to the protective film in the welding area is greatly reduced.

[0004] In actual production, skirts are set around the top cover patch, making the top cover patch a non-planar structure. This makes it very troublesome to accurately attach the patch to the battery top cover, and it is easy to attach it crookedly or with the edges lifted, which reduces production efficiency. Based on this, the existing battery top cover patch assembly structure has the problem of inconvenient attachment and needs further improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a battery top cover patch assembly structure to solve the problem mentioned in the background art, where the top cover patch has a non-planar structure, making it very troublesome to accurately attach the patch to the battery top cover, and it is easy to attach it crookedly or with raised edges, thus reducing production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a battery top cover patch assembly structure, comprising a battery casing, a top cover plate, and a cover patch. The battery casing has an mounting opening on its upper side. The top cover plate is snapped into the mounting opening of the battery casing. An annular recessed area is formed between the top cover plate and the inner wall of the battery casing. Solder is welded within the annular recessed area to fix the top cover plate to the battery casing. Adhesive is applied to the upper surface of the top cover plate within the annular recessed area. The cover patch is adhered to the upper surface of the battery casing and the top cover plate using the adhesive. Solder is welded to the top cover plate within the annular recessed area to prevent unevenness at the weld joint, which would affect the flatness of the cover patch's adhesion. Applying adhesive within the annular recessed area further strengthens the adhesion of the cover patch around its perimeter.

[0007] In some embodiments, the outer surface of the battery casing is provided with a pressing groove, and the inner wall of the battery casing forms a protrusion corresponding to the pressing groove. After the top cover is installed into the mounting opening of the battery casing, the lower surface of the top cover contacts the protrusion. The lower surface of the top cover has a chamfered edge. After the chamfered edge contacts the protrusion, the upper surface of the top cover is flush with the upper surface of the battery casing. The protrusion has a positioning function. Through pressing, the top cover can be well ensured to be flush with the upper surface of the battery casing, providing a flat plane for attaching the cover patch.

[0008] In some implementations, the upper surface of the top cover plate is provided with an arc-shaped chamfer around its perimeter. The arc-shaped outer wall of the chamfer and the inner wall of the battery casing form the annular recessed area, where welding and adhesive can be applied.

[0009] In some implementations, both the battery casing and the top cover are made of aluminum, providing a robust enclosure for the battery.

[0010] In some implementations, a positive terminal, a negative terminal, and an explosion-proof valve are respectively installed on the upper surface of the top cover plate, and an injection nozzle is fixedly installed on the upper surface of the top cover plate. The surface of the cover plate patch has four openings, and the four openings are respectively matched with the positions and shapes of the positive terminal, the negative terminal, the explosion-proof valve, and the injection nozzle. The cover plate patch has the functions of protection and insulation.

[0011] In some embodiments, the surface of the battery casing is covered with a heat-shrinkable protective sleeve, the upper opening of which contracts to cover the upper surface of the cover plate patch around its perimeter, and the protective sleeve also serves a protective and insulating function.

[0012] Beneficial effects

[0013] This utility model provides a battery top cover patch assembly structure, which has the following beneficial effects:

[0014] 1. The battery top cover patch assembly structure features an annular recessed area between the top cover plate and the inner wall of the battery casing. This allows for easy welding of the top cover plate to the annular recessed area, preventing unevenness at the welding point and ensuring a smooth adhesion of the cover patch. It also facilitates the application of adhesive within the annular recessed area, resulting in a more secure adhesion of the cover patch and making the patch application process more convenient.

[0015] 2. The battery top cover patch assembly structure, by setting extrusion grooves in the battery casing, forms a protrusion on the inner wall of the battery casing. This protrusion facilitates the secure fixing of the top cover plate into the upper opening of the battery casing, providing convenience for welding operations. Furthermore, the extrusion ensures that the top cover plate is flush with the upper surface of the battery casing, providing a flat surface for attaching the cover patch. This design makes the manufacturing of the battery casing simpler and faster, and also facilitates the assembly of cover patches designed as sheet structures. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the battery casing;

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point B.

[0020] In the diagram: 1 Battery casing, 2 Top cover, 3 Cover patch, 4 Annular recessed area, 5 Extrusion groove, 6 Protrusion, 7 Chamfered surface, 8 Arc chamfer, 9 Positive terminal post, 10 Negative terminal post, 11 Explosion-proof valve, 12 Injection nozzle, 13 Opening, 14 Protective cover. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This utility model provides a technical solution: a battery top cover patch assembly structure, including a battery shell 1, a top cover plate 2 and a cover patch 3. A positive terminal 9, a negative terminal 10 and an explosion-proof valve 11 are respectively installed on the upper surface of the top cover plate 2, and an injection nozzle 12 is fixedly installed on the upper surface of the top cover plate 2. The surface of the cover patch 3 has four openings 13, and the four openings 13 are respectively matched with the positions and shapes of the positive terminal 9, the negative terminal 10, the explosion-proof valve 11 and the injection nozzle 12.

[0023] A mounting opening is provided on the upper side of the battery casing 1. The top cover 2 is snapped into the mounting opening of the battery casing 1, forming an annular recessed area 4 between the top cover 2 and the inner wall of the battery casing 1. (Refer to...) Figure 2 Both the battery casing 1 and the top cover 2 are made of aluminum. Solder is welded in the annular recessed area 4 to fix the top cover 2 to the battery casing 1. Adhesive is applied to the upper surface of the top cover 2 in the annular recessed area 4, and the cover patch 3 is attached to the upper surface of the battery casing 1 and the top cover 2 by the adhesive.

[0024] Specifically, such as Figure 4 As shown, the outer surface of the battery casing 1 is provided with a compression groove 5, and the inner wall of the battery casing 1 forms a protrusion 6 corresponding to the compression groove 5. After the top cover plate 2 is installed into the mounting opening of the battery casing 1, the lower surface of the top cover plate 2 is in contact with the protrusion 6.

[0025] The lower surface of the top cover plate 2 has chamfered edges 7 around its perimeter. After the chamfered edges 7 come into contact with the protrusions 6, the upper surface of the top cover plate 2 is flush with the upper surface of the battery casing 1. By pressing, the upper surface of the top cover plate 2 and the upper surface of the battery casing 1 can be well ensured to be flush, providing a flat surface for attaching the cover plate patch 3. By setting the extrusion groove 5 in the battery casing 1, the inner wall of the battery casing 1 forms a protrusion 6. The protrusion 6 has a positioning function, which makes it easy for the top cover plate 2 to be firmly fixed in the upper opening of the battery casing 1, providing convenience for welding operations.

[0026] The top surface of the top cover plate 2 is provided with arc-shaped chamfers 8 around its perimeter. The arc-shaped outer wall of the arc-shaped chamfers 8 and the inner wall of the battery casing 1 form an annular recessed area 4. This design makes the manufacturing of the battery casing 1 simpler and faster, and also provides convenience for the assembly of the cover plate patch 3, which is designed as a sheet structure.

[0027] In this embodiment, refer to Figure 1The surface of the battery casing 1 is covered with a heat-shrinkable protective sleeve 14. The upper opening of the protective sleeve 14 shrinks and covers the upper surface and four edges of the cover plate patch 3. The outer surface of the protective sleeve 14 is wrapped with a layer of protective sleeve 14, which can serve as insulation to prevent short circuit between the metal casing and the external circuit, and also serve as protection to prevent wear and scratches on the metal casing. The upper opening of the protective sleeve 14 covers the four edges of the cover plate patch 3, which can suppress the edge warping of the cover plate patch 3.

[0028] Manufacturing principle: Both the battery casing 1 and the top cover 2 are made of stamped aluminum sheet. The battery casing 1 is closed at the bottom and open at the top. A stamping machine is used to stamp out extrusion grooves 5 on the surface of the battery casing 1. Simultaneously, a protrusion 6 is formed on the inner wall of the battery casing 1. A top cover 2 of suitable thickness is selected and pressed into the upper opening of the battery casing 1 using a downward pressing method. Figure 4 As shown, the upper surface of the top cover plate 2 is made flush with the upper surface of the battery casing 1. Then, laser welding is performed in the annular recessed area 4 to weld the top cover plate 2 and the battery casing 1 together. Then, adhesive is applied to the upper surface of the top cover plate 2 in the annular recessed area 4, and the cover plate patch 3 is attached to the upper surface of the battery casing 1 and the top cover plate 2 with adhesive. Finally, the protective cover 14 is put on, and the protective cover 14 is heated with a hot air gun to shrink and tightly wrap the protective cover 14 around the surface of the battery casing 1.

[0029] The battery top cover patch assembly structure has an annular recessed area 4 between the top cover plate 2 and the inner wall of the battery casing 1. This allows for the welding of solder to the top cover plate 2 in the annular recessed area 4, avoiding unevenness at the welding point that would affect the flatness of the cover patch 3. It also makes it easier to apply adhesive in the annular recessed area 4, making the cover patch 3 adhere more firmly around its perimeter, thus making the application of the cover patch 3 more convenient.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery top cover patch assembly structure, comprising a battery casing (1), a top cover plate (2), and a cover patch (3), characterized in that: The battery casing (1) has an installation opening on its upper side. The top cover plate (2) is snapped into the installation opening of the battery casing (1). An annular recessed area (4) is formed between the top cover plate (2) and the inner wall of the battery casing (1). Solder is welded into the annular recessed area (4) to fix the top cover plate (2) to the battery casing (1). Adhesive is applied to the upper surface of the top cover plate (2) in the annular recessed area (4). The cover plate patch (3) is pasted onto the upper surface of the battery casing (1) and the top cover plate (2) through the adhesive.

2. The battery top cover patch assembly structure according to claim 1, characterized in that: The outer surface of the battery casing (1) is provided with a compression groove (5), and the inner wall of the battery casing (1) forms a protrusion (6) corresponding to the compression groove (5). After the top cover plate (2) is installed into the mounting opening of the battery casing (1), the lower surface of the top cover plate (2) is in contact with the protrusion (6).

3. The battery top cover patch assembly structure according to claim 2, characterized in that: The lower surface of the top cover plate (2) is provided with a chamfered surface (7) around its perimeter. After the chamfered surface (7) contacts the protrusion (6), the upper surface of the top cover plate (2) is flush with the upper surface of the battery casing (1).

4. The battery top cover patch assembly structure according to claim 3, characterized in that: The top cover plate (2) has an arc-shaped chamfer (8) around its upper surface. The arc-shaped outer wall of the arc-shaped chamfer (8) and the inner wall of the battery casing (1) form the annular recessed area (4).

5. The battery top cover patch assembly structure according to claim 4, characterized in that: The battery casing (1) and top cover (2) are both made of aluminum.

6. The battery top cover patch assembly structure according to claim 5, characterized in that: The top cover plate (2) is equipped with a positive electrode post (9), a negative electrode post (10) and an explosion-proof valve (11) respectively, and an injection nozzle (12) is fixedly installed on the top cover plate (2).

7. The battery top cover patch assembly structure according to claim 6, characterized in that: The surface of the cover plate patch (3) has four openings (13), and the four openings (13) are respectively matched with the position and shape of the positive terminal (9), the negative terminal (10), the explosion-proof valve (11) and the injection nozzle (12).

8. The battery top cover patch assembly structure according to claim 7, characterized in that: The surface of the battery casing (1) is covered with a heat-shrinkable protective sleeve (14), and the upper opening of the protective sleeve (14) shrinks and covers the upper surface of the cover plate patch (3) around the edges.

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