Composite pole structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a composite pole structure and a battery, the composite pole structure comprises an upper pole body and a lower pole body, the lower part of the upper pole body forms a connecting part, the connecting part is fixedly connected with the lower pole body, the upper part of the upper pole body is provided with a bending ring piece which is bent and pressed on an upper plastic piece, and the bending ring piece is fixedly connected with the upper plastic piece. The bending ring piece is arranged around the periphery of the upper column body; in the assembling process of the upper column body and the lower column body, the connecting part is fixedly connected with the lower column body, the bent ring piece abuts against the upper plastic part, and the bent ring piece abuts against the upper plastic part, so that the composite pole structure is fixed in the battery top cover, and the composite pole structure is simple in fixing structure, stable in structure and low in cost.

Description

Technical Field

[0001] The utility model patent relates to the technical field of batteries, and specifically, to a composite pole structure and a battery. Background Art

[0002] In the technical field of batteries, the pole is a component in the battery that connects the inside and outside of the battery. One end of the pole is connected to the external circuit of the battery, and the other end is connected to the internal cell of the power battery, enabling the battery to realize the function of charging and discharging.

[0003] In order to meet the normal use of the battery, the negative electrode of the battery generally adopts a composite electrode, that is, the composite electrode is formed by a composite of an aluminum block and a copper block, the aluminum block part is formed on the outside of the battery, and the copper block part is formed on the inside of the battery.

[0004] In the prior art, the composite pole needs to be fixed in the battery top cover to ensure the internal and external connection requirements. However, the existing composite pole is complicated to fix in the battery top cover, resulting in a complex battery structure and high cost. Utility Model Content

[0005] The utility model aims to provide a composite pole structure, aiming to solve the problem of complex fixing of the composite pole structure in a battery top cover in the prior art.

[0006] The utility model is implemented in this way. The composite pole structure includes an upper column and a lower column. The lower part of the upper column forms a connecting part, and the connecting part is fixedly connected to the lower column. The upper part of the upper column has a bent ring piece that is bent and pressed against the upper plastic part. The bent ring piece is arranged around the outer circumference of the upper column.

[0007] Furthermore, the connecting portion and the lower column are fixed by welding.

[0008] Furthermore, the connecting portion and the lower column are fixed by electromagnetic pulse welding.

[0009] Furthermore, the bent ring piece encloses a hollow area with a top opening, a boss is protruding from the bottom of the hollow area, an annular groove is formed between the outer periphery of the boss and the bent ring piece, and the annular groove is arranged around the outer periphery of the boss.

[0010] Furthermore, a positioning hole is provided at the center of the boss.

[0011] Furthermore, the top of the bent ring piece is lower than the top of the boss.

[0012] Furthermore, the connecting portion and the lower column are fixedly connected after being plugged in.

[0013] Furthermore, the lower column has a surrounding lower plug-in ring, the lower plug-in ring surrounds a lower plug-in cavity with a top opening, the connecting part is inserted into the lower plug-in cavity, and the outer periphery of the connecting part abuts against the inner wall of the lower plug-in cavity.

[0014] Furthermore, the connecting portion has an upper plug-in ring arranged in a surrounding manner, the upper plug-in ring surrounds an upper plug-in cavity with a bottom opening, the lower column is inserted into the upper plug-in cavity, and the outer periphery of the lower column abuts against the inner wall of the upper plug-in cavity.

[0015] Compared with the prior art, the composite pole structure provided by the utility model utilizes a connecting portion to fix the lower pole during the assembly process of the upper pole and the lower pole, and the bent ring piece is pressed against the upper plastic part to achieve fixation of the composite pole structure in the battery top cover. The fixing structure is simple, stable and low in cost.

[0016] The utility model also provides a battery, comprising the composite pole structure.

[0017] Compared with the prior art, the battery provided by the utility model has a simple structure and low cost because the composite pole structure ensures the integrity of the internal structure of the battery top cover, thereby improving the quality of the composite pole structure and the quality of the battery top cover, thereby also improving the quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional cutaway schematic diagram of the composite pole structure provided by the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the bent ring piece of the composite pole structure provided by the utility model when the edge is not turned up;

[0020] Figure 3 It is a cross-sectional schematic diagram of the bent ring piece of the composite pole structure provided by the utility model after flanging;

[0021] Figure 4 It is a cross-sectional schematic diagram of the bent ring piece of the composite pole structure provided by the utility model when the edge is not turned up;

[0022] In the figure: upper plastic part 100; lower column 200, lower plug ring 201; upper column 300, annular groove 301, boss 302, positioning block 303, bent ring piece 304, connecting part 305, upper plug ring 306. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0025] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0027] The composite pole structure includes an upper column 300 and a lower column 200. The lower part of the upper column 300 forms a connecting portion 305, and the connecting portion 305 is fixedly connected to the lower column 200. The upper part of the upper column 300 has a bent ring piece 304 that is bent and pressed against the upper plastic part 100. The bent ring piece 304 is arranged around the outer periphery of the upper column 300.

[0028] The composite pole structure provided above is fixedly connected to the lower pole 200 by the connecting portion 305 during the assembly process of the upper pole 300 and the lower pole 200, and the bent ring piece 304 is pressed against the upper plastic part 100 to fix the composite pole structure in the battery top cover. The fixing structure is simple, stable and low in cost.

[0029] In actual manufacturing, a rotary riveting device can be used to perform a flanging operation to form a bent ring piece 304, which will not cause damage to the internal structure of the battery top cover, ensure the integrity of the internal structure of the battery top cover, and improve the quality of the composite pole structure and the quality of the battery top cover.

[0030] The connection part 305 and the lower column 200 are fixed by welding, so that the connection between the connection part 305 and the lower column 200 can be more stable and the fixed connection operation is convenient.

[0031] In some embodiments, the connection part 305 and the lower column 200 are fixed by electromagnetic pulse welding. After the connection part 305 and the lower column 200 are manufactured by cold heading, a composite pole can be obtained by electromagnetic pulse welding. At this time, the composite pole does not need to be processed again, which improves material utilization and reduces processing costs. At the same time, electromagnetic pulse welding can make the stability of the composite pole better, and the pulling strength can also meet the performance requirements of the composite pole structure, which effectively improves the production quality of the battery top cover, simplifies the manufacturing process of the composite pole structure, and increases the reliability of the composite pole structure.

[0032] In some embodiments, the bent ring piece 304 encloses a hollow area with a top opening, a boss 302 is protruding from the bottom of the hollow area, an annular groove 301 is formed between the outer periphery of the boss 302 and the bent ring piece 304, and the annular groove 301 is arranged around the outer periphery of the boss 302.

[0033] During the assembly process of the upper column 300 and the lower column 200, the connecting portion 305 is fixedly connected to the lower column 200, and a riveting device is used to rivet from the inside to the outside so that the originally vertically arranged bent ring piece 304 is gradually bent toward the horizontal direction to form a horizontally arranged bent ring piece 304.

[0034] When the rotary riveting equipment is working, the riveting head of the rotary riveting equipment contacts the originally vertically arranged bent ring piece 304 at a certain swing angle, and the swing angle of the rotary riveting head is generally 3 to 5 degrees. The swing riveting of the rotary riveting head gradually extends the local deformation to the whole, so that the workpiece to be riveted gradually forms a regular and firm overall deformation from the local deformation, thereby achieving the most ideal riveting effect. It is a process from quantitative change to qualitative change, which is different from the working method of traditional press riveting machines or punch riveting machines.

[0035] The bent ring piece 304 is formed by using a rotary riveting device. The force direction of the bent ring piece 304 during flanging is the lateral direction, which will not cause damage to the internal structure of the battery top cover, effectively ensuring the integrity of the internal structure and improving the quality of the product.

[0036] An annular groove 301 is formed between the boss 302 and the bent ring piece 304 to facilitate the flanging operation during the forming process of the bent ring piece 304 and to help ensure the flatness of the top surface of the raised portion.

[0037] A positioning hole is provided at the center of the boss 302. During the forming and flanging process of the bent ring piece 304, the boss 302 can be used to limit the bottom of the rotary rivet head, and the positioning hole can be used to position the rotary rivet head.

[0038] The top of the bent ring piece 304 is lower than the top of the boss 302 , so that the flanging operation of the bent ring piece 304 during the forming process is facilitated and the bending degree of the bent ring piece 304 is ensured to be sufficient.

[0039] In some embodiments, the connection portion 305 and the lower column 200 are fixedly connected after being plugged in, which not only facilitates the connection between the connection portion 305 and the lower column 200, but also makes the connection between the connection portion 305 and the lower column 200 more stable after being fixed.

[0040] In some embodiments, the lower column 200 has a surrounding lower plug ring 201, which surrounds a lower plug cavity with a top opening, and the connecting portion 305 is inserted into the lower plug cavity, and the outer periphery of the connecting portion 305 abuts against the inner wall of the lower plug cavity.

[0041] The connecting portion 305 is inserted into the lower plug-in cavity, and the lower plug-in ring 201 is used for circumferential positioning, so that the connecting portion 305 can be welded and fixed to the lower plug-in ring 201 by electromagnetic pulse welding on the circumferential side of the lower plug-in ring 201 .

[0042] Alternatively, the connecting portion 305 has an upper plug ring 306 arranged in a surrounding manner, the upper plug ring 306 surrounds an upper plug cavity with a bottom opening, the lower column 200 is inserted into the upper plug cavity, and the outer periphery of the lower column 200 abuts against the inner wall of the upper plug cavity.

[0043] The lower column 200 is inserted into the upper plug-in cavity, and the upper plug-in ring 306 is used to limit the lower column 200 circumferentially, so that the upper plug-in ring 306 and the lower column 200 can be welded and fixed by electromagnetic pulse welding on the circumference of the upper plug-in ring 306 .

[0044] This embodiment also provides a battery, including the above-mentioned composite pole structure, which ensures the integrity of the internal structure of the battery top cover, improves the quality of the composite pole structure and the quality of the battery top cover, and thus also improves the quality of the battery.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Composite pole structure, characterized in that: The invention comprises an upper column (300) and a lower column (200), wherein the lower part of the upper column (300) forms a connecting part (305), wherein the connecting part (305) is fixedly connected to the lower column (200), and the upper part of the upper column (300) has a bent ring piece bent and pressed against the upper plastic part (100), wherein the bent ring piece is arranged around the outer periphery of the upper column (300).

2. The composite pole structure according to claim 1, characterized in that: The connecting portion (305) and the lower column (200) are fixed by welding.

3. The composite pole structure according to claim 2, characterized in that: The connecting portion (305) and the lower column (200) are fixed by electromagnetic pulse welding.

4. The composite pole structure according to claim 1, characterized in that: The bent ring piece encloses a hollow area with an opening at the top, a boss is protruding from the bottom of the hollow area, an annular groove is formed between the outer periphery of the boss and the bent ring piece, and the annular groove is arranged around the outer periphery of the boss.

5. The composite pole structure according to claim 4, characterized in that: A positioning hole is provided at the center of the boss.

6. The composite pole structure according to claim 4, characterized in that: The top of the bent ring piece is lower than the top of the boss.

7. The composite pole structure according to any one of claims 1 to 6, characterized in that: The connecting portion (305) and the lower column (200) are fixedly connected after being plugged in.

8. The composite pole structure according to claim 7, characterized in that: The lower column (200) has a circumferentially arranged lower plug-in ring (201), the lower plug-in ring (201) surrounds a lower plug-in cavity with a top opening, the connecting portion (305) is inserted into the lower plug-in cavity, and the outer periphery of the connecting portion (305) abuts against the inner wall of the lower plug-in cavity.

9. The composite pole structure according to claim 7, characterized in that: The connecting portion (305) has an upper plug-in ring (306) arranged in a surrounding manner, and the upper plug-in ring (306) surrounds an upper plug-in cavity with a bottom opening, and the lower column (200) is inserted into the upper plug-in cavity, and the outer periphery of the lower column (200) abuts against the inner side wall of the upper plug-in cavity.

10. A battery, characterized in that The composite pole structure comprises the composite pole structure as claimed in any one of claims 1 to 9.

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