Square injection molding battery top cover plate structure

Abstract

The utility model discloses a square injection-molded battery top cover plate structure in the technical field of batteries, which comprises a top cover plate assembly, a positive pole, a negative pole and lower plastic cement, the top cover plate assembly comprises a top cover plate, an anti-explosion valve is welded in the center of the top cover plate, an anti-explosion valve protection sticker is fixedly arranged above the anti-explosion valve, and the anti-explosion valve protection sticker is fixedly connected with the top cover plate assembly. A positive pole mounting hole and a negative pole mounting hole are symmetrically formed in the two ends of the top cover plate, a positive pole welding pressing ring is welded in the positive pole mounting hole, a negative pole welding pressing ring is welded in the negative pole mounting hole, the bottom of the positive pole column and the bottom of the negative pole column are sleeved with sealing rings, and matched lower plastic is arranged at the bottom of the top cover plate assembly. The top cover piece, the positive electrode welding pressing ring and the negative electrode welding pressing ring are welded into the top cover piece assembly, then the injection molding procedure is conducted, the rigidity of the whole top cover is enhanced, the positive and negative upper plastic rubber coating formed through injection molding wraps the positive and negative electrode welding ring, and cost can be further reduced; the stability of the top cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a square injection-molded battery top cover plate structure. Background Art

[0002] The battery cover is a component used to protect the battery and conceal its internal structure. It usually works with the battery casing to form a sealed battery system. It not only protects the battery from physical damage from the outside, but also ensures that the chemical substances inside the battery do not leak, thereby ensuring the safety and reliability of the battery.

[0003] The conventional injection-molded top cover is assembled by injection molding a top cover sheet, the positive and negative electrode posts, the lower plastic, and a sealing ring. This creates a plastic overlay on the positive and negative electrodes, securing the entire top cover assembly and ensuring the seals are compressed to the required level and that the top cover is leak-proof. However, this structure is expensive, and only the plastic overlay on the post is subject to the shear force exerted by the post. This can cause the post to sink during long-term use under high temperatures or intense conditions, leading to insufficient seal compression and the risk of leaks. Utility Model Content

[0004] The purpose of the present utility model is to provide a square injection-molded battery top cover structure to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A square injection-molded battery top cover structure includes a top cover assembly, a positive electrode column 2, a negative electrode column 3, and a lower plastic 5. The top cover assembly includes a top cover sheet 1, an explosion-proof valve 11 welded to the center of the top cover sheet 1, an explosion-proof valve protective sticker 12 fixedly installed above the explosion-proof valve 11, and positive and negative electrode mounting holes symmetrically opened at both ends of the top cover sheet 1. A positive electrode welding pressure ring 21 is welded in the positive electrode mounting hole, and a negative electrode welding pressure ring 31 is welded in the negative electrode mounting hole. The bottoms of the positive electrode column 2 and the negative electrode column 3 are both sleeved with sealing rings 4, and an adaptive lower plastic 5 is provided at the bottom of the top cover assembly. The positive electrode welding pressure ring 21 is welded to the positive electrode mounting hole of the top cover sheet 1, and the negative electrode welding pressure ring 31 is welded to the negative electrode mounting hole. After the top cover assembly is formed, the injection molding process is performed. This can enhance the rigidity of the entire top cover, prevent the poles from sinking under high temperature and intense conditions, causing the top cover to leak, and reduce costs.

[0007] As a further solution of the present invention: the top of the positive electrode column 2 is sleeved in the positive electrode welding pressure ring 21, the positive electrode welding pressure ring 21 and the positive electrode column 2 are fixed by the positive electrode plastic encapsulation 22, and the positive electrode welding pressure ring 21 is embedded in the positive electrode plastic encapsulation 22.

[0008] As a further solution of the present invention, the top of the negative electrode column 3 is sleeved within a negative electrode welding pressure ring 31, and the negative electrode welding pressure ring 31 and the negative electrode column 3 are fixed by a negative electrode plastic coating 32. The negative electrode welding pressure ring 31 is embedded in the negative electrode plastic coating 32. The positive electrode plastic coating 22 formed after the injection molding process wraps around the positive electrode welding pressure ring 21, and the negative electrode plastic coating 32 wraps around the negative electrode welding pressure ring 31, thereby improving the shear resistance of the positive and negative electrode columns 2 and 3 while further reducing production costs.

[0009] As a further solution of the present invention, the top inner walls of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31 are both provided with multiple clips, and the top edges of the positive electrode column 2 and the negative electrode column 3 are both provided with openings corresponding to the top clips of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31. This facilitates the engagement of the positive electrode welding pressure ring 21 with the positive electrode column 2, and the engagement of the negative electrode welding pressure ring with the negative electrode column 3, thereby facilitating overall fastening.

[0010] As a further solution of the present invention: the cross-sections of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31 are both irregular polygonal rings.

[0011] As a further embodiment of the present invention, the negative electrode column 3 is made of a copper-aluminum composite plate. The copper layer in the copper-aluminum composite plate has excellent electrical conductivity, ensuring unimpeded current flow within the battery. The aluminum layer is corrosion-resistant, especially in harsh environments such as high temperature and high humidity. The aluminum layer can effectively prevent electrode corrosion and extend the battery's service life.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In the present invention, a positive electrode welding pressure ring 21 is welded at the positive electrode mounting hole of the top cover sheet 1, and a negative electrode welding pressure ring 31 is welded at the negative electrode mounting hole. After the top cover sheet assembly is formed, the injection molding process is performed. This can enhance the rigidity of the entire top cover, prevent the pole from sinking under high temperature and intense conditions, causing leakage of the top cover, and reduce costs at the same time.

[0014] 2. In the present invention, the positive electrode welding pressure ring is wrapped with the plastic coating on the positive electrode and the negative electrode welding pressure ring is wrapped with the plastic coating on the negative electrode formed after the injection molding process, thereby improving the shear resistance of the positive and negative electrode columns while further reducing the production cost.

[0015] 3. In the present invention, by setting the material of the negative electrode column to a copper-aluminum composite material, it combines the excellent conductivity of the copper layer and the corrosion resistance of the aluminum layer, which can ensure that the current flows smoothly inside the battery. Especially in harsh environments such as high temperature and high humidity, the aluminum layer can effectively prevent electrode corrosion and extend the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a three-dimensional component diagram of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the top cover assembly of the present invention;

[0019] Figure 4 It is a top view of the utility model;

[0020] Figure 5 This is a side view of the utility model at AA;

[0021] Figure 6 It is a bottom view of the present utility model.

[0022] In the figure: 1. Top cover; 11. Explosion-proof valve; 12. Explosion-proof patch; 2. Positive pole; 21. Positive pole welding pressure ring; 22. Plastic coating on positive pole; 3. Negative pole; 31. Negative pole welding pressure ring; 32. Plastic coating on negative pole; 4. Sealing ring; 5. Lower plastic. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-6 In the embodiment of the utility model, a square injection-molded battery top cover plate structure includes a top cover sheet assembly, a positive electrode column 2, a negative electrode column 3, and a lower plastic 5. The top cover sheet assembly includes a top cover sheet 1, an explosion-proof valve 11 is welded in the center of the top cover sheet 1, and an explosion-proof valve protective sticker 12 is fixedly installed above the explosion-proof valve 11. Positive electrode mounting holes and negative electrode mounting holes are symmetrically opened at both ends of the top cover sheet 1. A positive electrode welding pressure ring 21 is welded in the positive electrode mounting hole, and a negative electrode welding pressure ring 31 is welded in the negative electrode mounting hole. The bottom of the positive electrode column 2 and the negative electrode column 3 are both sleeved with a sealing ring 4, and an adaptive lower plastic 5 is provided at the bottom of the top cover sheet assembly.

[0025] The top of the positive electrode column 2 is sleeved in the positive electrode welding pressure ring 21 , and the positive electrode welding pressure ring 21 and the positive electrode column 2 are fixed by the positive electrode plastic encapsulation 22 , and the positive electrode welding pressure ring 21 is embedded in the positive electrode plastic encapsulation 22 .

[0026] The top of the negative electrode column 3 is sleeved in the negative electrode welding pressure ring 31 , and the negative electrode welding pressure ring 31 and the negative electrode column 3 are fixed by the negative electrode upper plastic encapsulation 32 , and the negative electrode welding pressure ring 31 is embedded in the negative electrode upper plastic encapsulation 32 .

[0027] Among them, the top inner walls of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31 are both provided with multiple buckles, and the top edges of the positive electrode column 2 and the negative electrode column 3 are both provided with openings corresponding to the top buckles of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31.

[0028] The cross sections of the positive electrode welding pressure ring 21 and the negative electrode welding pressure ring 31 are both irregular polygonal rings.

[0029] The negative electrode column 3 is made of a copper-aluminum composite plate.

[0030] The positive electrode welding pressure ring and the top cover sheet are welded at the positive electrode mounting hole position, and similarly, the negative electrode welding pressure ring and the top cover sheet are welded at the negative electrode mounting hole position to form a top cover sheet assembly; then, the lower plastic of the top cover sheet assembly, the positive electrode column, the negative electrode column and the sealing ring are assembled and placed in an injection molding machine for injection molding, and a positive electrode upper plastic package is formed around the positive electrode welding pressure ring and the positive electrode column. Similarly, a negative electrode upper plastic package is formed around the negative electrode welding pressure ring and the negative electrode column, which can fix the entire top cover sheet assembly, wherein a sealing ring is placed between the top cover sheet and the positive electrode column and the negative electrode column.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention, who makes equivalent replacements, modifications and changes based on the technical solution and utility model concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A square injection molded battery top cover plate structure, comprising a top cover plate assembly, a positive electrode column (2), a negative electrode column (3), and a lower plastic (5), characterized in that: The top cover sheet assembly comprises a top cover sheet (1), an explosion-proof valve (11) is welded at the center of the top cover sheet (1), an explosion-proof valve protection sticker (12) is fixedly arranged above the explosion-proof valve (11), a positive electrode mounting hole and a negative electrode mounting hole are symmetrically opened at both ends of the top cover sheet (1), a positive electrode welding pressure ring (21) is welded in the positive electrode mounting hole, and a negative electrode welding pressure ring (31) is welded in the negative electrode mounting hole, the bottoms of the positive electrode column (2) and the negative electrode column (3) are both sleeved with sealing rings (4), and an adaptive lower plastic (5) is provided at the bottom of the top cover sheet assembly.

2. The square injection molded battery top cover structure according to claim 1, characterized in that: The top of the positive pole column (2) is sleeved in the positive pole welding pressure ring (21), the positive pole welding pressure ring (21) and the positive pole column (2) are fixed by the positive pole plastic encapsulation (22), and the positive pole welding pressure ring (21) is embedded in the positive pole plastic encapsulation (22).

3. The square injection molded battery top cover structure according to claim 1, characterized in that: The top of the negative pole column (3) is sleeved in the negative pole welding pressure ring (31), the negative pole welding pressure ring (31) and the negative pole column (3) are fixed by the negative pole upper plastic encapsulation (32), and the negative pole welding pressure ring (31) is embedded in the negative pole upper plastic encapsulation (32).

4. The square injection molded battery top cover structure according to claim 1, characterized in that: The top inner walls of the positive electrode welding pressure ring (21) and the negative electrode welding pressure ring (31) are both provided with a plurality of buckles, and the top edges of the positive electrode column (2) and the negative electrode column (3) are both provided with openings corresponding to the top buckles of the positive electrode welding pressure ring (21) and the negative electrode welding pressure ring (31).

5. The square injection molded battery top cover structure according to claim 1, characterized in that: The cross-sections of the positive electrode welding pressure ring (21) and the negative electrode welding pressure ring (31) are both irregular polygonal circular rings.

6. The square injection molded battery top cover structure according to claim 1, characterized in that: The material of the negative electrode column (3) is a copper-aluminum composite plate.

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