A cylindrical supercapacitor

Abstract

The utility model discloses a kind of cylindrical supercapacitors, it includes: shell, shell is the cylindrical of upper end opening;Positive current collector, positive current collector is fixed in the bottom of shell by laser welding;Negative current collector, the upper end of negative current collector is threadedly cooperated with spiral upper cover, annular roller groove is set on the inner side wall of shell upper port, spiral upper cover and annular roller groove inner buckle cooperation;Roll core, roll core is located in shell, and the both ends of roll core are respectively welded with positive current collector and negative current collector;Sealing ring, sealing ring is connected between the outer side wall of spiral upper cover and the inner side wall of shell;The negative current collector of the scheme and spiral upper cover adopt spiral locking mode, replace traditional complex hot mounting process, avoid the security risk brought by high temperature, and assembly is more convenient;Positive current collector and negative current collector adopt petal-like hollow design, be conducive to electrolyte quick infiltration electric core;Directly impact electric core is avoided simultaneously by liquid injection pressure.

Description

Technical Field

[0001] This utility model relates to the field of energy storage components technology, specifically to a cylindrical supercapacitor. Background Technology

[0002] The casing of a supercapacitor (hereinafter referred to as a capacitor) is assembled by matching the dimensions of the structural components of the capacitor casing during the manufacturing process. This process ensures that the product itself and each structural component are connected and assembled in the correct position in an orderly manner. This process also allows for convenient, quick, safe and accurate product installation.

[0003] In actual production, the manufacturing process mainly uses wound supercapacitors. However, large-capacity supercapacitors still suffer from drawbacks such as cumbersome processing of the casing components and poor reliability. During the electrolyte injection process at the top of the negative electrode cap, the high-voltage injection may cause impact on the negative electrode of the cell, potentially damaging the cell and affecting its lifespan. Therefore, existing supercapacitor casing structures still have the following defects: 1. Supercapacitors have complex shell structures, require high processing precision, and involve cumbersome manufacturing processes; 2. The negative current collector and the top cover are heat-fitted, which poses a safety hazard. After laser welding, the negative current collector is prone to deformation due to the small stress area. Furthermore, the negative high voltage may impact the battery cell during the liquid injection process, causing structural damage and affecting the battery cell's lifespan. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a cylindrical supercapacitor, which solves the technical problems mentioned in the background.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A cylindrical supercapacitor is provided, comprising: a housing, the housing being cylindrical with an open top; The positive current collector is fixed to the bottom of the housing by laser welding; the negative current collector has its upper end threaded into the spiral cover, and an annular roller groove is provided on the inner side wall of the upper port of the housing, with the spiral cover engaging with the annular roller groove; the core is located inside the housing, and its two ends are welded to the positive and negative current collectors respectively; the liquid injection port is located in the middle of the spiral cover, and a sealing plug is provided at the liquid injection port; and the sealing ring is connected between the outer side wall of the spiral cover and the inner side wall of the housing.

[0006] Furthermore, the positive electrode current collector has several fan-shaped perforated holes arranged in the circumferential direction, and the negative electrode current collector has several fan-shaped perforated holes and radial ribs arranged in the circumferential direction, with the fan-shaped perforated holes and radial ribs being staggered in the circumferential direction of the negative electrode current collector.

[0007] Furthermore, both the positive and negative current collectors are made of aluminum.

[0008] Furthermore, the sealing plug includes a rubber plug that seals against the inner wall of the injection port and an aluminum plug that is welded to the outer port of the injection port.

[0009] Furthermore, a cellulose diaphragm is provided between the outer wall of the core and the inner wall of the shell.

[0010] Furthermore, the outer wall of the spiral cover is connected to the annular roller groove by an insulating rubber ring.

[0011] Furthermore, a planar explosion-proof valve is provided on the outer wall of the housing.

[0012] The beneficial effects of this utility model are as follows: 1. The negative electrode current collector and the spiral cover of this solution adopt a spiral locking method, which replaces the traditional complicated heat-fitting process, avoids the safety hazards caused by high temperature, and makes the assembly more convenient.

[0013] 2. The positive and negative current collectors adopt a petal-shaped hollow design, which facilitates CCD visual positioning welding and allows the electrolyte to quickly wet the cell. At the same time, when the capacitor is injected with high voltage, the pressure is directly applied to the negative current collector, avoiding direct impact of the injection pressure on the cell. The radial ribs can enhance the impact resistance of the negative current collector, thereby protecting the cell structure and extending the capacitor life.

[0014] 3. The flat-type explosion-proof valve can quickly release pressure when the internal pressure of the capacitor is too high, avoiding the risk of explosion and improving product safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a cylindrical supercapacitor.

[0016] Figure 2 This is a cross-sectional view of a cylindrical supercapacitor.

[0017] Figure 3 This is a schematic diagram of the positive current collector.

[0018] Figure 4 This is a schematic diagram of the negative electrode current collector.

[0019] Among them, 1. shell, 2. positive electrode current collector, 3. negative electrode current collector, 4. spiral top cover, 5. annular roller groove, 6. core, 7. liquid injection port, 8. sealing ring, 9. fan-shaped hollow hole, 10. radial rib, 11. rubber stopper, 12. aluminum stopper, 13. insulating rubber ring, 14. flat explosion-proof valve. Detailed Implementation

[0020] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0021] like Figures 1 to 4 As shown, the cylindrical supercapacitor of this scheme includes: a shell 1, which is cylindrical with an open top; a positive current collector 2, which is fixed to the bottom of the shell 1 by laser welding; a negative current collector 3, the upper end of which is threaded into a spiral cover 4, and the spiral cover 4 is connected to the upper port of the shell 1 by a roller groove sealing process; a core 6, which is located inside the shell 1, and both ends of the core 6 are welded to the positive current collector 2 and the negative current collector 3 respectively; a liquid injection port 7, which is opened in the middle of the spiral cover 4, and a sealing plug is provided at the liquid injection port 7; and a sealing ring 8, which is connected between the outer side wall of the spiral cover 4 and the inner side wall of the shell 1.

[0022] The negative electrode collector 3 and the spiral cover 4 in this solution adopt a spiral locking method, which replaces the traditional complicated heat-fitting process, avoids the safety hazards caused by high temperature, and makes the assembly more convenient.

[0023] As an optional implementation, both the positive current collector 2 and the negative current collector 3 are made of aluminum material with a thickness of 1mm. The positive current collector 2 has six fan-shaped hollow holes 9 arranged in a circumferential direction, and the negative current collector 3 has six fan-shaped hollow holes 9 and six radial ribs 10 arranged in a circumferential direction. The six fan-shaped hollow holes 9 and six radial ribs 10 are staggered in the circumferential direction of the negative current collector 3. The positive current collector 2 and the negative current collector 3 adopt a petal-shaped hollow design, which facilitates CCD visual positioning welding and allows the electrolyte to quickly wet the battery cell. At the same time, when the capacitor is injected with high voltage, the pressure is directly applied to the negative current collector 3, avoiding the direct impact of the injection pressure on the battery cell. The radial ribs 10 can enhance the impact resistance of the negative current collector 3, thereby protecting the battery cell structure and extending the life of the capacitor.

[0024] As an optional implementation, the sealing plug includes a rubber plug 11 that seals against the inner wall of the injection port 7 and an aluminum plug 12 that is welded to the outer port of the injection port 7 to ensure sealing after injection; a cellulose diaphragm is provided between the outer wall of the core 6 and the inner wall of the housing 1 to provide insulation between the core 6 and the housing 1. As an optional implementation, an annular roller groove 5 is provided on the inner sidewall of the upper port of the housing 1, and the outer sidewall of the spiral cover 4 is connected to the annular roller groove 5 by an insulating rubber ring 13. In specific implementation, the housing 1 is uniformly squeezed by waist molding, thereby forming an annular roller groove 5 on the inner sidewall of the upper port of the housing 1. The insulating rubber ring 13 is fastened to the outer sidewall of the spiral cover 4, and then the insulating rubber ring 13 is fastened to the annular roller groove 5, thereby achieving the limiting and fixing of the spiral cover 4.

[0025] As an optional implementation, a planar explosion-proof valve 14 is provided on the outer wall of the housing 1. The planar explosion-proof valve 14 can quickly release pressure when the internal pressure of the capacitor is too high, avoid the risk of explosion, and improve product safety.

[0026] The assembly process of this solution is described in detail below: The two ends of the finished core 6 are fixedly connected to the positive current collector 2 and the negative current collector 3 respectively by laser welding. After the spiral cover 4 is screwed onto the negative current collector 3, the housing 1 is then installed, and the sealing ring 8 is connected between the outer side wall of the spiral cover 4 and the inner side wall of the housing 1. Then, the spiral cover 4 is tightly connected to the upper port of the housing 1 by roller groove sealing process. The positive current collector 2 is laser-penetrated welded to the bottom position of the housing 1 to make the positive current collector 2 tightly connected to the outer shell. After liquid injection, the liquid injection port 7 is sealed by the rubber stopper 11. Finally, the aluminum stopper 12 is sealed to the outer end of the liquid injection port 7 by laser welding.

Claims

1. A cylindrical supercapacitor, characterized in that, include: A housing, the housing being cylindrical with an open top; A positive current collector, which is fixed to the bottom of the housing by laser welding; The negative electrode current collector has its upper end threadedly engaged with the spiral cover. An annular roller groove is provided on the inner side wall of the upper port of the housing, and the spiral cover is engaged with the annular roller groove. The core is located inside the housing, and its two ends are welded to the positive current collector and the negative current collector, respectively. The injection port is located in the middle of the spiral cap and is equipped with a sealing plug. A sealing ring is connected between the outer wall of the spiral cap and the inner wall of the housing.

2. The cylindrical supercapacitor according to claim 1, characterized in that, The positive electrode current collector has several fan-shaped perforated holes arranged in a circumferential gap, and the negative electrode current collector has several fan-shaped perforated holes and radial ribs arranged in a circumferential gap, with the fan-shaped perforated holes and radial ribs arranged alternately in the circumferential direction of the negative electrode current collector.

3. The cylindrical supercapacitor according to claim 2, characterized in that, Both the positive and negative current collectors are made of aluminum.

4. The cylindrical supercapacitor according to claim 1, characterized in that, The sealing plug includes a rubber plug that seals against the inner wall of the injection port and an aluminum plug that is welded to the outer port of the injection port.

5. The cylindrical supercapacitor according to claim 1, characterized in that, A cellulose diaphragm is provided between the outer wall of the core and the inner wall of the shell.

6. The cylindrical supercapacitor according to claim 1, characterized in that, The outer wall of the spiral cover is connected to the annular roller groove by an insulating rubber ring.

7. The cylindrical supercapacitor according to claim 1, characterized in that, A planar explosion-proof valve is provided on the outer wall of the housing.

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