High sealing high safety super capacitor

Abstract

The utility model provides a kind of high sealing high safety super capacitor, it is related to capacitor design technical field, its technical key points are at: including from top to bottom sequentially arranged cover plate assembly, upper current collector, roll core assembly and lower current collector, still including shell and sleeve, the shell is sleeved in the outer periphery of the roll core assembly, the sleeve is sleeved in the outer periphery of the shell, the cover plate assembly includes from top to bottom sequentially abutting metal base plate, lower plastic and adapter piece, the metal base plate is supported in the top of the shell, limit hole is equipped at the middle position of the metal base plate, sealing ring is arranged in the limit hole, the cross section of the sealing ring is arranged in the shape of H, the outer periphery of the sealing ring outward extending portion is supported on the upper and lower sides of the limit hole. By sealing ring using the structure of the shape of H, can realize two sealing structures, compared with original one sealing structure, sealing effect is better, effectively avoid the leakage phenomenon of super capacitor.

Description

Technical Field

[0001] This utility model relates to the field of supercapacitor design technology, and in particular to a high-sealing and high-safety supercapacitor. Background Technology

[0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device that falls between traditional capacitors and batteries. Their core technology lies in highly reversible physical electrostatic energy storage or rapid electrochemical reaction energy storage, achieving energy densities far exceeding those of ordinary capacitors. The electrolyte is one of the core components of a supercapacitor, playing a crucial role in ion transport. It has a decisive impact on the final device's performance.

[0003] In practical applications, due to the small molecular weight of the electrolyte in supercapacitors, leakage is extremely easy when the sealing structure is weak. Currently, most supercapacitors on the market have a single-seal structure, resulting in a high leakage rate and insufficient sealing, which seriously affects the long-term performance of the capacitor. This is especially true in fields with higher vibration requirements, such as the automotive and military industries, where effective sealing is paramount. Utility Model Content

[0004] The purpose of this invention is to solve the problems of high leakage rate and insufficient sealing in existing supercapacitor structures, which are mostly single-seal structures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-sealing, high-safety supercapacitor includes, from top to bottom, a cover plate assembly, an upper current collector, a core assembly, and a lower current collector, and also includes a housing and a sleeve. The housing is fitted around the outer periphery of the core assembly, and the sleeve is fitted around the outer periphery of the housing. The cover plate assembly comprises, from top to bottom, a metal substrate, a lower plastic component, and an adapter piece, which abut against each other. The metal substrate abuts against the top of the housing. A limiting hole is provided at the middle position of the metal substrate, and a sealing ring is disposed within the limiting hole. The sealing ring has an I-shaped cross-section, and its outwardly extending portion abuts against the upper and lower sides of the limiting hole.

[0007] Preferably, the top of the metal substrate is provided with an opening groove, the inner diameter of the opening groove is larger than the inner diameter of the limiting hole, and the cover plate assembly further includes a negative electrode post, the cross-section of the negative electrode post in the vertical direction is T-shaped, the horizontal part of the negative electrode post abuts against the opening groove of the metal substrate, and is abutted and limited by the top of the sealing ring.

[0008] Preferably, an upper plastic is disposed around the negative electrode post, and the upper plastic fills the space between the metal substrate and the horizontal portion of the negative electrode post.

[0009] Preferably, the lower plastic is located between the metal substrate and the adapter piece, a groove is provided above the middle part of the lower plastic, a through hole is provided in the middle part of the adapter piece, the through hole is connected to the limiting hole, the vertical part of the negative electrode post is inserted into the limiting hole of the metal substrate and extends downward, and the bottom of the negative electrode post is on the same plane as the bottom surface of the adapter piece.

[0010] Preferably, the upper current collector is disc-shaped, and an extension portion is formed by extending upward around the periphery of the upper current collector. The extension portion abuts against the transition step and is fixedly connected.

[0011] Preferably, the lower manifold is arranged in a disc shape, and staggered reinforcing ribs are provided at the bottom of the lower manifold. The bottom of the lower manifold is welded and fixed to the bottom of the outer shell 5.

[0012] Preferably, the metal substrate is provided with substrate steps around its periphery. The substrate steps are in two sections, wherein the outer substrate step is matched with the outer periphery of the top of the outer shell, and the other section is matched with the lower plastic.

[0013] Preferably, a liquid injection hole is provided at the middle position of the negative electrode post. The liquid injection hole is divided into three sections from top to bottom, wherein the upper and lower sections are cylindrical holes, and the cylindrical hole in the upper section is larger than that in the lower section. The middle section of the liquid injection hole has a trapezoidal cross-section in the vertical direction, and the upper and lower ends of the middle section are respectively connected to the upper and lower cylindrical holes.

[0014] Preferably, the injection hole is filled with a rubber stopper and an aluminum stopper. The rubber stopper is fixed to the lower section of the injection hole and completely covers it, while the aluminum stopper is fixed to the upper section of the injection hole on the cover plate and is fixedly installed with the negative electrode post.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1. In this application, the sealing ring adopts an "I"-shaped structure, which can realize a double sealing structure, which has a better sealing effect than the original single sealing structure and effectively avoids leakage of supercapacitors.

[0017] 2. By using plastic retainers around the negative electrode post in this application, the product's resistance to compression is effectively improved, making it less prone to displacement under stress, thus ensuring greater safety and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-sealing, high-safety supercapacitor according to one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram showing the disassembled high-sealing and high-safety supercapacitor according to one embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional schematic diagram of a high-sealing and high-safety supercapacitor cover plate assembly according to one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram showing the disassembled structure of a high-sealing, high-safety supercapacitor cover plate assembly according to one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of a high-sealing, high-safety supercapacitor upper winding core assembly according to one embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional schematic diagram of a high-sealing, high-safety supercapacitor according to one embodiment of the present invention.

[0024] In the diagram, 1. Cover plate assembly; 11. Metal substrate; 111. Substrate step; 112. Limiting hole; 113. Opening groove; 12. Lower plastic; 121. Groove; 13. Adapter piece; 131. Through hole; 132. Through hole; 133. Adapter step; 14. Sealing ring; 15. Negative electrode post; 151. Injection hole; 16. Upper plastic; 2. Upper current collector; 21. Extension; 3. Core assembly; 31. Core assembly body; 32. Separating membrane; 33. High temperature tape; 4. Lower current collector; 41. Reinforcing rib; 5. Outer shell; 51. Explosion-proof wire; 6. Sleeve; 7. Rubber stopper; 8. Aluminum stopper. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments.

[0026] Please see Figure 1 and Figure 2 A high-sealing, high-safety supercapacitor includes a cover plate assembly 1, an upper current collector 2, a core assembly 3, a lower current collector 4, a housing 5, and a sleeve 6. The cover plate assembly 1, the upper current collector 2, the core assembly 3, and the lower current collector 4 are arranged sequentially from top to bottom. The housing 5 is fitted around the outer periphery of the core assembly 3, and the sleeve 6 is fitted around the outer periphery of the housing 5. The cover plate assembly 1 is a combined structure. The upper current collector 2 abuts against the lower part of the cover plate assembly 1. The upper and lower ends of the core assembly 3 are respectively connected to the upper current collector 2 and the lower current collector 4.

[0027] Please see Figure 2 and Figure 3In one embodiment, the cover plate assembly 1 is a combined structure, comprising a metal substrate 11, a lower plastic 12, and an adapter piece 13 arranged sequentially from top to bottom. The metal substrate 11 is a plate-shaped structure and is made of aluminum or steel. A substrate step 111 is provided around the periphery of the metal substrate 11. The substrate step 111 has two sections, with the outer section matching the outer periphery of the top of the outer shell 5, and the other section matching the lower plastic 12. In one embodiment, a limiting hole 112 is provided in the middle of the metal substrate 11, and an opening groove 113 is provided at the top of the metal substrate 11. The inner diameter of the opening groove 113 is larger than the inner diameter of the limiting hole 112. A sealing ring 14 is provided on the inner side of the metal substrate 11. The sealing ring 14 is made of EPDM rubber or fluororubber, and its cross-section is I-shaped. The outwardly extending portion of the sealing ring 14 abuts against the upper and lower sides of the limiting hole. By setting the sealing ring 14, a double sealing structure is achieved, which provides a better sealing effect compared to existing technologies and effectively avoids leakage of the supercapacitor.

[0028] The lower plastic 12 is located between the metal substrate 11 and the adapter piece 13. The lower plastic 12 is a corrosion-resistant engineering plastic such as PP or PEEK. The lower plastic 12 is arranged in a ring shape. A groove 121 is provided above the middle part of the lower plastic 12. The groove 121 is matched with the inner substrate step 111.

[0029] Please see Figure 2 and Figure 3 The adapter piece 13 is used for the connection between the cover plate assembly 1 and the upper manifold 2. The adapter piece 13 is made of aluminum or copper. A connecting step 133 is provided below the adapter piece 13, located on the outer periphery of the adapter piece 13, and is used for the connection between the adapter piece 13 and the lower manifold 4. A through hole 131 is provided in the middle portion of the adapter piece 13, which communicates with the limiting hole 112. To reduce the weight of the adapter piece 13, a circular array of through holes 132 is also provided on the adapter piece 13.

[0030] In one implementation, such as Figure 3As shown, the cover plate assembly 1 further includes a negative electrode post 15. The negative electrode post 15 is made of metal, preferably aluminum, copper, or a copper-aluminum composite material. The negative electrode post 15 has a T-shaped cross-section in the vertical direction. The horizontal part of the negative electrode post 15 abuts against the metal substrate 11 and is supported and limited by the top of the sealing ring 14. Specifically, the horizontal part of the negative electrode post 15 abuts against the opening groove 113. The vertical part of the negative electrode post 15 is inserted into the limiting hole 112 of the metal substrate 11 and extends downward. The bottom of the negative electrode post 15 is on the same plane as the bottom surface of the adapter piece 13. In one embodiment, the outer peripheral wall of the negative electrode post 15 abuts against the inner wall of the sealing ring 14. A liquid injection hole 151 is provided at the middle position of the negative electrode post 15. The liquid injection hole 151 is divided into three sections from top to bottom, with the upper and lower sections being cylindrical holes, the upper cylindrical hole being larger than the lower cylindrical hole. The middle section of the liquid injection hole 151 has a trapezoidal cross-section in the vertical direction, and its upper and lower ends are connected to the upper and lower cylindrical holes respectively. The liquid injection hole 151 is filled with a rubber stopper 7 and an aluminum stopper 8. The rubber stopper 7 is made of EPDM rubber or fluororubber, and the aluminum stopper 8 is made of aluminum. The rubber stopper 7 is fixed to the lower section of the liquid injection hole 151 and completely covers it. The aluminum stopper 8 is fixed to the upper section of the liquid injection hole 151 on the cover plate and is fixedly disposed with the negative electrode post 15. In one embodiment, the aluminum stopper 8 is fixed by laser welding through the inner wall of the negative electrode post 15.

[0031] To improve the product's resistance to compression, please refer to [link / reference]. Figure 3 The negative electrode post 15 is surrounded by an upper plastic 16, which is a special engineering plastic such as PPS, PEEK, or PI. The upper plastic 16 fills the space between the metal substrate 11 and the horizontal portion of the negative electrode post 15. The upper plastic 16 effectively limits the movement of the negative electrode post 15, thereby improving the product's resistance to compression and preventing displacement under stress, making it safer and more reliable.

[0032] Please see Figure 3 and Figure 4 The upper current collector 2 is disc-shaped and made of aluminum or copper. An extension portion 21 is formed by extending upward around the periphery of the upper current collector 2. The inner and outer sides of the connection between the extension portion 21 and the upper current collector 2 are rounded. The extension portion 21 abuts against the transition step 133. In one embodiment, the extension portion 21 and the transition step 133 are fixed by laser welding.

[0033] Please see Figure 5The core assembly 3 includes a core assembly 3 body and a separator 32. The core assembly 3 body is provided with a positive electrode sheet and a negative electrode sheet. The core assembly 3 body winds the positive electrode sheet and the negative electrode sheet together by winding. A separator 32 is provided between the positive and negative electrode sheets of the core assembly 3 body. The upper part of the core assembly 3 is wrapped with high-temperature tape 33.

[0034] like Figure 6 As shown, the lower manifold 4 is arranged in a disc shape, and staggered reinforcing ribs 41 are provided at the bottom of the lower manifold 4. The bottom of the lower manifold 4 is welded and fixed to the bottom of the outer shell 5.

[0035] In one embodiment, the outer casing 5 is a cylindrical shape with an open top. The outer casing 5 is made of aluminum or steel. An explosion-proof wire 51 is provided on the outer side of the outer casing 5. A groove 121 is provided at the bottom of the inner wall of the outer casing 5. The groove 121 is welded and fixed to the lower current collector 4.

[0036] The sleeve 6 is fitted onto the surface of the outer casing 5. In one embodiment, the sleeve 6 can be made of materials such as PVC, PET, PI, or UV coating.

[0037] This application provides a high-sealing, high-safety supercapacitor. Through the structural arrangement of the sealing ring 14, it achieves a double-sealing structure, providing a better sealing effect compared to the original single-sealing structure and effectively preventing leakage. Furthermore, the use of upper plastic 16 around the negative electrode post 15 for restraint effectively improves the product's resistance to compression, making it less prone to displacement under stress, thus enhancing safety and reliability.

Claims

1. A high-sealing, high-safety supercapacitor, comprising, from top to bottom, a cover plate assembly, an upper current collector, a core assembly, and a lower current collector, and further comprising a housing and a sleeve, wherein the housing is sleeved around the outer periphery of the core assembly, and the sleeve is sleeved around the outer periphery of the housing, characterized in that: The cover plate assembly includes a metal substrate, a lower plastic piece, and an adapter piece arranged sequentially from top to bottom. The metal substrate abuts against the top of the outer shell. A limiting hole is provided in the middle of the metal substrate. A sealing ring is provided in the limiting hole. The sealing ring has an I-shaped cross-section. The outer periphery of the sealing ring extends outward and abuts against the upper and lower sides of the limiting hole.

2. The high-sealing, high-safety supercapacitor according to claim 1, characterized in that: The top of the metal substrate is provided with an opening groove, the inner diameter of which is larger than the inner diameter of the limiting hole. The cover plate assembly also includes a negative electrode post, the cross-section of which is T-shaped in the vertical direction. The horizontal part of the negative electrode post abuts against the opening groove of the metal substrate and is abutted and limited by the top of the sealing ring.

3. The high-sealing, high-safety supercapacitor according to claim 2, characterized in that: The negative electrode post is surrounded by an upper plastic layer, which fills the space between the metal substrate and the horizontal portion of the negative electrode post.

4. The high-sealing, high-safety supercapacitor according to claim 3, characterized in that: The lower plastic is located between the metal substrate and the adapter piece. A groove is provided above the middle part of the lower plastic. A through hole is provided in the middle part of the adapter piece. The through hole is connected to the limiting hole. The vertical part of the negative electrode post is inserted into the limiting hole of the metal substrate and extends downward. The bottom of the negative electrode post and the bottom surface of the adapter piece are on the same plane.

5. A high-sealing, high-safety supercapacitor according to claim 4, characterized in that: The upper current collector is disc-shaped, and an extension portion is formed by extending upward around the periphery of the upper current collector. The extension portion abuts against the transition step and is fixedly connected.

6. A high-sealing, high-safety supercapacitor according to claim 5, characterized in that: The lower manifold is arranged in a disc shape, and staggered reinforcing ribs are provided at the bottom of the lower manifold. The bottom of the lower manifold is welded and fixed to the bottom of the outer shell 5.

7. A high-sealing, high-safety supercapacitor according to claim 6, characterized in that: The metal substrate is provided with substrate steps around its perimeter. The substrate steps are in two sections, with the outer substrate step matching the outer periphery of the top of the outer shell and the other section matching the lower plastic.

8. A high-sealing, high-safety supercapacitor according to claim 7, characterized in that: A liquid injection hole is provided at the middle position of the negative electrode post. The liquid injection hole is divided into three sections from top to bottom. The upper and lower sections are cylindrical holes, and the cylindrical hole in the upper section is larger than that in the lower section. The middle section of the liquid injection hole has a trapezoidal cross-section in the vertical direction, and the upper and lower ends of the middle section are connected to the upper and lower cylindrical holes respectively.

9. A high-sealing, high-safety supercapacitor according to claim 8, characterized in that: The injection hole is filled with a rubber stopper and an aluminum stopper. The rubber stopper is fixed to the lower section of the injection hole and completely covers it. The aluminum stopper is fixed to the upper section of the injection hole on the cover plate and is fixedly installed with the negative electrode post.

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