Pole assembly and secondary battery

Abstract

The utility model discloses a pole assembly and a secondary battery, and belongs to the technical field of batteries. The pole assembly comprises an aluminum ring, a sealing ring, a pole and upper plastic, a flange is arranged in the middle of the inner diameter of the sealing ring, the flange does not participate in compression and is used for isolating the aluminum ring and the pole to guarantee the insulation safety distance, and tooth-shaped knurling grooves are formed in the outer diameter of the aluminum ring and the outer diameter of the pole. According to the pole assembly and the secondary battery provided by the embodiment of the invention, the safety risk and the cost of the pole assembly can be reduced, and the pole assembly has the advantages of novel structure, convenience in automatic production and the like.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a pole assembly and a secondary battery. Background Art

[0002] As a rechargeable and reusable battery, secondary batteries are not only economical and practical, but also have broad application prospects in the fields of environmentally friendly vehicles, power storage, etc. With the continuous advancement of technology and policy support, the market size and performance of secondary batteries will be further improved.

[0003] A secondary battery generally includes a pole assembly, which includes an aluminum ring, a sealing ring, a pole and an upper plastic. However, the pole assembly provided by the related art has safety risks and high costs due to the structural design. Utility Model Content

[0004] The present application provides a pole assembly and a secondary battery, which solve the above-mentioned technical problems by optimizing the structural design.

[0005] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0006] The embodiment of the present application provides a pole assembly, including an aluminum ring, a sealing ring, a pole and an upper plastic;

[0007] The inner diameter of the sealing ring is designed with a flange in the middle, and the flange does not participate in compression. The flange is used to isolate the aluminum ring and the pole to ensure the insulation safety distance;

[0008] The aluminum ring and the outer diameter of the pole are provided with toothed knurling grooves.

[0009] In some embodiments, the aluminum ring is provided with a matching boss, and the matching boss is used to be assembled and connected with the barb structure of the lower plastic in the top cover assembly.

[0010] In some embodiments, the pole assembly is divided into a positive pole assembly and a negative pole assembly. The pole of the negative pole assembly includes a negative aluminum pole and a negative copper plate. The negative aluminum pole and the negative copper plate are connected by a brazing process. The brazing paste is heated and melted to connect the negative copper plate to the negative aluminum pole.

[0011] In some embodiments, the negative electrode aluminum column is a hollow structure or a solid structure.

[0012] An embodiment of the present application also provides a secondary battery, comprising the electrode assembly provided by any of the above embodiments.

[0013] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0014] The pole assembly and secondary battery provided in the embodiments of the present application can reduce the safety risks and costs of the pole assembly, and have the advantages of novel structure and convenience for automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of a top cover assembly provided in an embodiment of the present application is shown;

[0017] Figure 2 An exploded view of a top cover assembly provided in an embodiment of the present application is shown;

[0018] Figure 3 Shows Figure 2 A top view of the top cover assembly is shown;

[0019] Figure 4 A schematic structural diagram of a barb structure provided in an embodiment of the present application is shown;

[0020] Figure 5 Shows Figure 2 a bottom view of the top cover assembly shown;

[0021] Figure 6 An exploded view of a pole assembly provided in an embodiment of the present application is shown;

[0022] Figure 7 An exploded view of a negative electrode column assembly provided in an embodiment of the present application is shown;

[0023] Figure 8 A schematic diagram of the structure of the sealing ring provided in an embodiment of the present application is shown;

[0024] Fig. 9 A schematic diagram of the structure of an aluminum ring provided in an embodiment of the present application is shown;

[0025] Fig.10 A partial cross-sectional view of a top cover assembly provided in an embodiment of the present application is shown.

[0026] Illustration Description:

[0027] 10. Pole assembly; 11. Apply plastic; 12. Pole; 120. Solder paste; 121. Negative aluminum column; 122. Negative copper plate; 13. Sealing ring; 131. Flange; 14. Aluminum ring; 141. Matching boss; 15. Toothed knurling groove;

[0028] 20. top cover sheet; 21. groove; 22. convex hull;

[0029] 30. Lower plastic; 31. Barb structure. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] 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 the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0034] See also Figures 1 to 10 As shown, an embodiment of the present application provides a top cover assembly, including a pole assembly 10 , a top cover sheet 20 and a lower plastic 30 , wherein the pole assembly 10 is mounted on the top cover sheet 20 , and the lower plastic 30 is mounted on the back of the top cover sheet 20 .

[0035] In some embodiments, the pole assembly 10 is divided into a positive pole assembly and a negative pole assembly, and both the positive pole assembly and the negative pole assembly include an upper plastic 11, a pole 12, a sealing ring 13, and an aluminum ring 14. As an example, the pole 12 of the positive pole assembly is integrally formed, and the pole 12 of the negative pole assembly includes a negative aluminum pole 121 and a negative copper plate 122, and the negative aluminum pole 121 and the negative copper plate 122 are connected by a brazing process, that is, the brazing paste 120 is heated and melted to connect the negative copper plate 122 and the negative aluminum pole 121.

[0036] As an example, the negative electrode aluminum column 121 is a hollow structure or a solid structure.

[0037] In some embodiments, the inner diameter of the sealing ring 13 is designed with a flange 131 in the center, and the flange 131 does not participate in compression. The flange 131 is used to isolate the aluminum ring 14 and the pole 12 to ensure the insulation safety distance, and play an anti-mistake effect. Specifically, when manufacturing the pole assembly 10, the pole 12 and the aluminum ring 14 squeeze and compress the main part of the sealing ring 13 without compressing the flange 131, which can prevent the flange 131 from deforming to ensure the insulation safety distance. The anti-mistake effect means that since the flange 131 is symmetrically arranged in the center of the inner ring of the sealing ring 13, the sealing ring 13 does not distinguish between the front and back sides, and there is no need to worry about the sealing ring 13 being placed upside down.

[0038] In some embodiments, the outer diameters of the aluminum ring 14 and the pole 12 are provided with toothed knurled grooves 15 for preventing rotation.

[0039] In some embodiments, a groove 21 is punched on the upper surface of the top cover sheet 20 , so that a convex bump 22 corresponding to the groove 21 is formed on the back side of the top cover sheet 20 , and the convex bump 22 serves to increase the strength.

[0040] As an example, 1-2 circles of grooves 21 can be punched and set. For example, one circle of grooves 21 is set around the pole assembly 10, and another circle of grooves 21 is set around the explosion-proof valve position.

[0041] As an example, the height dimensions of the groove 21 and the convex bump 22 correspond to each other, and the height is 0.2-1.5 mm, and the groove width of the groove 21 is 1.0 mm to 5.0 mm.

[0042] As an example, the thickness of the top cover sheet 20 is 0.5 mm-1.5 mm.

[0043] In some embodiments, the back side of the lower plastic 30 is a flat plate, and the upper surface of the lower plastic 30 is provided with a barb structure 31 at the position for mounting the pole assembly 10 . The barb structure 31 is used to hook and assemble the aluminum ring 14 from the gap between the pole 12 and the aluminum ring 14 .

[0044] As an example, Fig.10 As shown, the barb structure 31 is hooked and assembled with the matching boss 141 of the aluminum ring 14 .

[0045] The pole assembly 10 provided in the above embodiment can reduce the safety risk and cost of the pole assembly 10 and has the advantages of novel structure and convenience for automated production.

[0046] The top cover assembly provided in the above embodiment has the advantages of novel structure and convenience for automated production, and can reduce the cost of the top cover assembly.

[0047] In some embodiments of the present application, a secondary battery is further provided, comprising the pole assembly 10 or the top cover assembly provided in any of the above embodiments, which also has the above beneficial effects. For example, the secondary battery is a lithium-ion battery.

[0048] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A pole assembly, characterized in that: Including aluminum ring, sealing ring, pole and plastic; A flange is designed in the center of the inner diameter of the sealing ring, and the flange does not participate in compression. The flange is used to isolate the aluminum ring and the pole to ensure a safe insulation distance; The aluminum ring and the outer diameter of the pole are provided with toothed knurling grooves.

2. The pole assembly according to claim 1, characterized in that: The aluminum ring is provided with a matching boss, and the matching boss is used for assembly and connection with the barb structure of the lower plastic in the top cover assembly.

3. The pole assembly according to claim 1, characterized in that: The pole column assembly is divided into a positive pole column assembly and a negative pole column assembly. The pole of the negative pole column assembly includes a negative pole aluminum column and a negative pole copper plate. The negative pole aluminum column and the negative pole copper plate are connected by a brazing process. The negative pole copper plate is connected to the negative pole aluminum column by heating and melting the brazing paste.

4. The pole assembly according to claim 3, characterized in that: The negative electrode aluminum column is a hollow structure or a solid structure.

5. A secondary battery, characterized in that: The invention comprises the pole assembly according to any one of claims 1 to 4.

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