A minimalist cylindrical structural member

Abstract

The utility model discloses a kind of minimalist cylindrical structural members, related technical field of cylindrical battery, including single pass shell, the single pass shell is installed with roll core, the bottom of the single pass shell not opening is equipped with insulating rubber layer, the upside of the roll core is connected with negative electrode current collector on the insulating rubber layer, the copper bar that is fixedly connected on the negative electrode current collector penetrates the roll core, the upper end of the roll core is equipped with and the copper bar is connected with positive electrode current collector;The utility model uses thin layer silicone rubber to realize permanent insulation between negative electrode current collector and shell, replace traditional plastic insulating ring;Adopt negative electrode current collector center welding pure copper bar, penetrate roll core center through hole, positive electrode current collector open center hole and cover insulating ring to form longitudinal conductive isolation channel;Integrally stamping forming aluminum cover plate, negative electrode column is insulated with cover plate by aluminum oxide ceramic ring, cancel traditional lower plastic part, make internal space utilization rate improve.

Description

Technical Field

[0001] This utility model relates to the technical field of cylindrical batteries, and in particular to a minimally sized cylindrical structural component. Background Technology

[0002] A cylindrical battery consists of a core made of positive and negative electrode separators wound together, positive and negative electrode covers, a casing, and electrolyte encapsulation. The overall shape is cylindrical. The casing can be made of aluminum or steel. The core rod is the central pin used to begin winding the positive and negative electrodes and separator. The core rod is usually hollow or solid cylindrical. The separator is typically attached to the surface of the core rod using tape or heat-sealing to begin winding.

[0003] Traditional cylindrical battery casings use a dual-channel or single-channel structure. For example, aluminum casings have the positive electrode connected to the casing, while the negative electrode is insulated from the positive electrode of the casing. Steel casing cells have the negative electrode connected to the casing, while the positive electrode is insulated from the negative electrode of the casing. The negative electrode requires an additional insulating component to separate the positive and negative electrodes, resulting in low space utilization and complex assembly processes.

[0004] In existing technologies, there is a risk of short circuit when the current collector comes into contact with the casing, and the insulation structure of the cover plate occupies internal volume, affecting the improvement of energy density. Utility Model Content

[0005] Purpose of the invention: The purpose of this utility model is to provide a minimalist cylindrical structural component that solves the problems of short circuit risk due to contact between the current collector and the shell, and the problem of insulation structure occupying internal space.

[0006] A minimalist cylindrical structural component includes a single-pass housing, a core installed inside the single-pass housing, an insulating rubber layer at the bottom of the unopened single-pass housing, a negative current collector connected to the upper side of the insulating rubber layer on the core, a copper rod fixedly connected to the negative current collector penetrating the core, and a positive current collector connected to the copper rod at the upper end of the core.

[0007] Furthermore, an insulating rubber ring is provided at the center of the positive current collector, and a through hole is provided inside the insulating rubber ring of the positive current collector, through which the copper rod passes.

[0008] Furthermore, an integrated cover plate is connected to the positive current collector, and the copper rod is connected to the integrated cover plate.

[0009] Furthermore, the lower end face of the integrated cover plate is connected to a negative electrode post area, and the negative electrode post area is connected to the copper rod.

[0010] Furthermore, the upper surface of the integrated cover plate is provided with a central explosion-proof valve and a liquid injection hole.

[0011] Furthermore, the integrated cover plate has a positive electrode welding area on its periphery.

[0012] Furthermore, the integrated cover plate and the single-pass housing are connected by laser welding.

[0013] Furthermore, the core is connected to the negative current collector and the positive current collector by laser welding.

[0014] Beneficial effects: The use of thin-layer silicone rubber achieves permanent insulation between the negative electrode current collector and the shell, replacing the traditional plastic insulating ring; a pure copper rod is welded to the center of the negative electrode current collector, penetrating the central through hole of the core, and the positive electrode current collector has a central hole and is covered with an insulating ring to form a longitudinal conductive isolation channel; an integrally stamped aluminum cover plate, with the negative electrode post insulated from the cover plate by an alumina ceramic ring, eliminates the traditional lower plastic parts, thus improving the utilization rate of internal space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the integrated cover plate structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the positive current collector structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the negative electrode current collector structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the single-pass shell structure of this utility model;

[0020] Reference numerals: 11. Core; 12. Single-pass housing; 13. Insulating rubber layer; 21. Positive current collector; 22. Insulating rubber ring; 23. Negative current collector; 24. Copper rod; 25. Through hole; 31. Integrated cover plate; 32. Explosion-proof valve; 33. Liquid injection hole; 34. Negative electrode post area; 35. Insulating pad; 36. Positive electrode welding area. Detailed Implementation

[0021] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0022] like Figure 1-5 As shown, this application includes a minimalist cylindrical structure, including a single-pass housing 12. The entire structure is composed of the single-pass housing 12, a positive and negative integrated cover plate 31, a negative copper pillar integrated current collector 23, and a positive open-hole insulating current collector 21. A core 11 is installed inside the single-pass housing 12.

[0023] The unopened side of the single-pass housing 12 is coated with an insulating rubber layer 13. The recommended coating thickness and material is a thin layer of silicone rubber (such as Shin-Etsu KE-12 series) of 0.05-0.2mm. This achieves permanent insulation between the negative electrode current collector 23 and the single-pass housing 12, replacing traditional plastic insulation components, resulting in a longer service life and better performance.

[0024] The negative electrode current collector 23 is made of metal copper and other materials, and a Φ2-4mm pure copper hollow rod 24 is laser-welded to the center. This diameter ensures that it can penetrate the central through hole of the core 11. The height of the copper rod 24 is determined according to the actual height of the core 11.

[0025] The positive current collector 21 has a through hole 25 with a diameter of 3-6mm. An insulating rubber ring 22 (thickness 0.3-0.5mm) is provided around the through hole 25 to ensure that after the copper rod 24 passes through the through hole 25, the copper rod 24 and the insulating rubber ring 22 abut against each other to form a longitudinal conductive isolation channel.

[0026] Furthermore, the integrated cover plate 31 is made of one-piece stamped aluminum. The lower end face of the integrated cover plate 31 is connected to the negative electrode post area 34. The negative electrode post is insulated from the cover plate by an alumina ceramic ring, eliminating the traditional lower plastic part and improving the utilization rate of internal space.

[0027] Meanwhile, a blind hole (tolerance ±0.05mm) is provided at the lower end of the negative electrode post area 34. The diameter of the blind hole is equal to the diameter of the copper rod 24. After the copper rod 24 is inserted, the top end is 0.1-0.3mm lower than the plane of the integrated cover plate 31.

[0028] Furthermore, the integrated cover plate 31 is provided with a central explosion-proof valve 33 and a liquid injection hole 33, and the outer ring is thinner, with the thinner area used for through welding between the positive electrode current collector and the shell.

[0029] The assembly steps of one of the simplified battery structures in this application are as follows:

[0030] S1: Assemble the negative electrode current collector 23 of the integrated copper rod 24 with the wound core 11. Insert the copper rod 24 into the central hole of the core 11 and weld the negative electrode current collector 23 and the negative electrode lug of the core 11 using laser welding.

[0031] S2: Assemble the positive current collector 21 with the core 11. The copper rod 24 passes through the central rubber insulating ring 22, and the positive current collector 21 and the core 11 positive electrode tab are welded together by laser welding.

[0032] S3: The copper rod 24 is inserted into the positive and negative electrode integrated cover plate 31. Laser welding is used to weld the copper rod 24 to the blind hole joint in the center of the integrated cover plate 31. At the same time, through welding is performed on the integrated cover plate 31 and the positive electrode current collector 21 at the thinnest part of the integrated cover plate 31.

[0033] S4: Apply insulating tape to the negative electrode lug of the core 11 and insert it into the single-pass housing 12. Then, laser weld the joint between the single-pass housing 12 and the integrated cover plate 31.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A minimalist cylindrical structural component, comprising a single-through housing (12), characterized in that: The single-pass housing (12) is equipped with a core (11). The bottom of the single-pass housing (12) without opening is provided with an insulating rubber layer (13). The core (11) is connected to a negative current collector (23) on the upper side of the insulating rubber layer (13). A copper rod (24) that penetrates the core (11) is fixedly connected to the negative current collector (23). The upper end of the core (11) is provided with a positive current collector (21) that is connected to the copper rod (24).

2. The minimalist cylindrical structural component according to claim 1, characterized in that, An insulating rubber ring (22) is provided at the center of the positive current collector (21), and a through hole (25) is provided in the insulating rubber ring (22) of the positive current collector (21), through which the copper rod (24) passes.

3. A minimalist cylindrical structural component according to claim 1, characterized in that, An integrated cover plate (31) is connected to the positive current collector (21), and the copper rod (24) is connected to the integrated cover plate (31).

4. A minimalist cylindrical structural component according to claim 3, characterized in that, The lower end face of the integrated cover plate (31) is connected to the negative electrode post area (34), and the negative electrode post area (34) is connected to the copper rod (24).

5. A minimalist cylindrical structural component according to claim 3, characterized in that, The upper surface of the integrated cover plate (31) is provided with a central explosion-proof valve (32) and an injection hole (33).

6. A minimalist cylindrical structural component according to claim 3, characterized in that, The integrated cover plate (31) has a positive electrode welding area (36) on its periphery.

7. A minimalist cylindrical structural component according to claim 3, characterized in that, The integrated cover plate (31) and the single-pass housing (12) are connected by laser welding.

8. A minimalist cylindrical structural component according to claim 1, characterized in that, The core (11) is connected to the negative current collector (23) and the positive current collector (21) by laser welding.

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