A cylindrical power supply core with a detachable end cap

Abstract

The utility model relates to a cylindrical power supply core with detachable end cover, aims at solving the current electric core end cover adopts welding process and directly fixes the end cover with the metal shell of electric core body, when the electric core appears internal breakdown or needs to replace and maintain the end cover assembly, cannot carry out the nondestructive dismounting technical problem, including electric core shell and end cover body, the bottom fixedly connected with bottom column of end cover body, the side wall fixedly connected with the plug of bottom column, the inside wall of electric core shell top opening department is equipped with the plug -in mouth, the utility model discloses through the plug -in mouth after the plug of end cover body bottom inserts into, after the rotation groove of up and down alternation finally enters into extrusion groove, then rotates end cover body, and the extrusion groove height gradually reduces along with the rotation, and the plug -in mouth produces the sustained extrusion force, and the more rotation is fixed, and the more stable, thereby letting the end cover can be disassembled, and the sealing property and stability that end cover is connected with electric core shell are ensured, and the problem that traditional welding end cover cannot be repaired and replaced is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of power supply core technology, specifically a cylindrical power supply core with a detachable end cap. Background Technology

[0002] In modern electronic devices, new energy storage systems, and industrial control devices, cylindrical power supply cells have become core energy components for ensuring continuous equipment operation due to their advantages such as compact structure, high energy density, and strong spatial adaptability. The top end cap not only serves to protect the internal electrochemical materials of the cell and prevent the intrusion of external dust and moisture, but also provides a stable interface for the connection between the cell and external circuits. It is a key component for the cylindrical power supply cell to achieve energy output and safety protection.

[0003] Current battery cell end caps are directly fixed to the metal casing of the battery cell body using a welding process. While this method achieves high sealing strength, it creates an inseparable integrated structure between the end cap and the battery cell body. When an internal fault occurs in the battery cell or the end cap assembly needs to be replaced or repaired, the end cap cannot be disassembled without damage, necessitating the scrapping of the entire battery cell. This significantly increases equipment maintenance costs. Therefore, a new technical solution is proposed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a cylindrical power supply core with a detachable end cap. This solves the technical problem that the current battery cell end cap is directly fixed to the metal shell of the battery cell body by welding process, and when the battery cell has an internal fault or the end cap assembly needs to be replaced or repaired, the end cap cannot be disassembled without damage.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a cylindrical power supply core with a detachable end cap is designed, including a core shell and an end cap body. A bottom post is fixedly connected to the bottom of the end cap body, and an insertion block is fixedly connected to the side wall of the bottom post. An insertion port is provided on the inner side wall of the top opening of the core shell. The bottom of the insertion port communicates with a rotary groove provided on the inner side wall of the core shell. The bottom of the rotary groove communicates with a compression groove provided on the inner side wall of the core shell. The width of the insertion block is the same as the width of the insertion port.

[0006] In this design, after the insert block at the bottom of the end cap body is inserted into the insertion port, it passes through an alternating up-and-down rotating groove and finally enters the compression groove. At the same time as entering the compression groove, the snap-fit ​​component at the bottom of the outer end cap body also snaps in. At this point, the end cap body is rotated, and the height of the compression groove gradually decreases with rotation, generating a continuous squeezing force on the insert block, making it more and more stable as it rotates. This structure not only provides the end cap with the ability to disassemble without damage, but also ensures the sealing and stability of the connection between the end cap and the battery cell shell, effectively solving the problem that traditional welded end caps cannot be repaired or replaced.

[0007] Preferably, the top of the battery cell housing is provided with a top groove, and the outer side wall of the battery cell housing is provided with a circumferential groove.

[0008] In practical applications, the top groove can accurately position the No. 1 sealing ring to prevent it from shifting; the slot and the end cap retaining ring cooperate to quickly pre-fix the end cap during installation, which facilitates the subsequent docking of the insert block with the groove body and improves assembly efficiency.

[0009] Preferably, a retaining ring is fixedly connected to the bottom edge of the end cap body, and a No. 1 sealing ring is fixed at the position corresponding to the top groove on the bottom of the end cap body.

[0010] In practical applications, the retaining ring can initially restrict the rotation of the end cap when it is inserted into the groove, and the No. 1 sealing ring can block the entry of external moisture by deforming under pressure, making it suitable for humid environments.

[0011] Preferably, the inner side of the end cap body is provided with a pole post, the upper and lower ends of the pole post are respectively located on the top surface of the end cap body and the bottom surface of the bottom post, the pole post is rotatably connected to the end cap body and the bottom post, and the inner sidewall of the bottom post is provided with an annular groove.

[0012] In practical applications, the rotation of the pole post can adjust the position of the magnet block, enabling the retraction and extension of the limit block; the annular groove provides rotation space for the magnet block, preventing it from rubbing against the inner wall of the bottom post and extending the component's lifespan.

[0013] Preferably, an arc-shaped magnet block is fixedly connected to the side wall of the pole post, and the magnet block is located inside the annular groove.

[0014] In practical applications, the arc-shaped magnet can attract the limiting block, ensuring that the limiting block is stored during installation; the annular groove provides space for rotation.

[0015] Preferably, the top center of the insert block is provided with a limiting hole, and the top surface of the limiting hole directly above the limiting hole is provided with a receiving groove, and the inner side of the receiving groove is slidably connected to the limiting block.

[0016] In practical applications, the limiting hole and the limiting block work together to lock the position of the insert and prevent the end cap from loosening; the storage slot can temporarily store the limiting block without affecting the movement of the insert during installation.

[0017] Preferably, the limiting block is made of metal that can be attracted by a magnet, and a miniature spring is fixedly connected between the top of the limiting block and the inner top of the storage groove, and the inner wall of the storage groove is smoothly processed.

[0018] In practical applications, the magnetic metal material makes it easy to put and take out the limit block, and the micro spring can automatically push out the limit block; the smooth inner wall reduces friction and ensures that the limit block responds quickly, avoiding the inability to move due to excessive friction.

[0019] Preferably, a second sealing ring is provided at the lower end of the side wall of the pole where it contacts the bottom post, and a third sealing ring is provided at the lower end of the side wall of the bottom post where it contacts the inner wall of the battery cell casing.

[0020] In practical applications, the No. 2 sealing ring can prevent electrolyte from seeping into the gap between the electrode posts, and the No. 3 sealing ring blocks the gap between the outer shell and the bottom post. The double seal is adapted to the long-term operation requirements of new energy storage systems.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model features a movable end cap body at the top of the battery cell casing. After the insert block at the bottom of the end cap body is inserted into the insertion port, it passes through an alternating up-and-down rotating groove and finally enters the pressing groove. At the same time as entering the pressing groove, the snap-fit ​​component at the bottom of the end cap body also snaps in. At this point, rotating the end cap body causes the height of the pressing groove to gradually decrease, generating a continuous pressing force on the insert block, making it more and more stable with each rotation. This structure provides the end cap with the ability to be disassembled without damage, while ensuring the sealing and stability of the connection between the end cap and the battery cell casing, effectively solving the problem that traditional welded end caps cannot be repaired or replaced.

[0022] 2. This utility model provides a limiting hole on the surface of the insert block. When the insert block is rotated into position, the limiting hole is aligned with the receiving groove. Due to the attraction of the magnet, the limiting block is stored in the receiving groove. At this time, rotating the pole post causes the magnet to shift. The limiting block, which has lost its attraction effect, is pushed into the limiting hole by the miniature spring, forming a mechanical limit. This completely restricts the axial and circumferential movement of the insert block and the end cover body, further improving the fixing reliability of the end cover body and ensuring the long-term stable operation of the power supply core. Attached Figure Description

[0023] Figure 1 This is an external schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the battery cell casing of this utility model; Figure 3 This is a schematic cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the end cap body of this utility model; Figure 5 This is a cross-sectional schematic diagram of the end cap body of this utility model; Figure 6 This is a partial enlarged view of point A of this utility model; In the diagram: 1. Battery cell casing; 101. Top groove; 102. Slot; 2. End cap body; 201. First sealing ring; 202. Snap ring; 203. Bottom post; 3. Insertion port; 301. Rotary groove; 302. Extrusion groove; 4. Terminal post; 5. Insertion block; 501. Limiting hole; 6. Second sealing ring; 7. Annular groove; 8. Magnet block; 9. Storage groove; 901. Miniature spring; 902. Limiting block; 10. Third sealing ring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: A cylindrical power supply core with a detachable end cap, see [link to example]. Figures 1 to 6 The device includes a battery cell housing 1 and an end cap body 2. The end cap body 2 has an inner pole 4. The upper and lower ends of the pole 4 are located on the top surface of the end cap body 2 and the bottom surface of the bottom post 203, respectively. The bottom post 203 is fixedly connected to the bottom of the end cap body 2. The side wall of the bottom post 203 is fixedly connected to the insertion block 5. The inner wall of the top opening of the battery cell housing 1 has an insertion port 3. The bottom of the insertion port 3 communicates with the rotary groove 301 provided on the inner wall of the battery cell housing 1. The bottom of the rotary groove 301 communicates with the compression groove 302 provided on the inner wall of the battery cell housing 1. The width of the insertion block 5 is the same as the width of the insertion port 3, which can prevent the insertion block 5 from shifting when inserted and ensure the installation accuracy.

[0025] It is worth mentioning that the main body of the battery cell casing 1 contains a cylindrical battery cell assembly. This assembly is based on a wound structure and consists of a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The components work together to store and release electrical energy, providing a stable power supply for external devices.

[0026] In the above technical solution, the insert 5 on the bottom post 203 of the end cap body 2 is first vertically inserted into the insertion port 3 on the inner side wall of the top opening of the cell housing 1. After the insert 5 moves down along the insertion port 3 to the rotary groove 301, it enters the rotary groove 301 channel with the initial rotation of the end cap body 2, and continues to move down and rotate into the extrusion groove 302. During disassembly, the end cap body 2 is rotated in the opposite direction, so that the insert 5 exits from the extrusion groove 302 into the rotary groove 301, and then is taken out upward along the rotary groove 301 and the insertion port 3, thus separating the end cap body 2 from the cell housing 1. By using the insertion, rotation, and extrusion mechanism, the traditional welding fixing method is replaced, which not only meets the connection requirements between the end cap and the housing, but also enables disassembly. This effectively solves the problem that traditional power cell end caps cannot be disassembled and can only be scrapped as a whole if they fail, reducing maintenance costs and improving resource utilization.

[0027] Specifically, such as Figure 4 and Figure 5 As shown, the pole post 4 is rotatably connected to the end cap body 2 and the bottom post 203. The rotation between them has a large damping effect, thus providing a partial limiting effect and keeping the pole post 4 in a fixed position when no external force is applied. The inner wall of the bottom post 203 is provided with an annular groove 7, and an arc-shaped magnet block 8 is fixedly connected to the side wall of the pole post 4, located inside the annular groove 7. When the pole post 4 rotates, it drives the arc-shaped magnet block 8 fixed to the side wall to rotate synchronously within the annular groove 7 on the inner wall of the bottom post 203. The annular groove 7 provides rotation space for the magnet block 8, preventing collision and interference between the magnet block 8 and the inner wall of the bottom post 203, thus fitting the compact internal structure of the bottom post 203.

[0028] Furthermore, such as Figure 5 and Figure 6 As shown, a limiting hole 501 is provided at the center of the top of the insertion block 5. A storage groove 9 is provided on the top surface of the limiting hole 501 directly above the limiting hole 501. A limiting block 902 is slidably connected to the inner side of the storage groove 9. The limiting block 902 is made of metal that can be attracted by the magnet block 8. A miniature spring 901 is fixedly connected between the top of the limiting block 902 and the top of the inner side of the storage groove 9. The inner wall of the storage groove 9 is smoothly processed. In the initial state, the magnet 8 generates an attractive force on the magnetically attracted limiting block 902, overcoming the elastic force of the micro spring 901, so that the limiting block 902 is stored in the storage groove 9. When the insert 5 rotates to the designated position of the pressing groove 302, the limiting hole 501 is aligned with the storage groove 9. At this time, rotating the pole post 4 causes the magnet 8 to deviate from directly above the limiting block 902, the attractive force disappears, the micro spring 901 recovers its deformation, and pushes the limiting block 902 down along the smooth inner wall of the storage groove 9 and inserts it into the limiting hole 501 of the insert 5, thereby achieving the limiting and fixing of the insert 5, thus completely restricting the axial and circumferential movement of the end cover body 2, further improving the fixing reliability of the end cover body 2, and ensuring the long-term stable operation of the power supply core.

[0029] It should be noted that the arc-shaped block has a certain length and rotates with the entire base column 203. During the rotation, the magnet block 8 first reaches the storage slot 9, thereby attracting the limiting block 902 and allowing the subsequent insertion block 5 to pass through normally. After the insertion block 5 is in place, the pole column 4 is rotated to drive the magnet block 8 to shift.

[0030] It is worth mentioning that a second sealing ring 6 is provided at the lower end of the side wall of the pole post 4 where it contacts the bottom post 203, and a third sealing ring 10 is provided at the lower end of the side wall of the bottom post 203 where it contacts the inner wall of the cell casing 1. The second sealing ring 6 fits tightly against the contact gap between the lower end of the side wall of the pole post 4 and the bottom post 203, and the third sealing ring 10 fits tightly against the contact gap between the lower end of the side wall of the bottom post 203 and the inner wall of the cell casing 1. By utilizing the elastic deformation of the sealing rings themselves, the tiny gaps at the two connection points are filled, preventing external dust and moisture from entering the power supply cell, and at the same time preventing internal electrolyte leakage.

[0031] It should be noted that both the No. 2 sealing ring 6 and the No. 3 sealing ring 10 are made of nitrile rubber. This material has excellent oil and solvent resistance, can resist the corrosion of the electrolyte inside the power supply core, and has good elasticity and small permanent compression deformation, which can maintain the sealing performance for a long time and is suitable for the working environment of the power supply core.

[0032] It is worth noting that, such as Figure 2 and Figure 3 As shown, the top of the battery cell housing 1 is provided with a top groove 101, and the outer wall of the battery cell housing 1 is provided with a surrounding groove 102. The bottom edge of the end cap body 2 is fixedly connected with a surrounding retaining ring 202, and a No. 1 sealing ring 201 is fixedly fixed at the bottom of the end cap body 2 at the position corresponding to the top groove 101. In actual installation, a layer of glue can be applied to the outer surface of the top of the battery cell housing 1, thereby further improving the stability and sealing of the end cap body 2 after solidification.

[0033] In the above technical solution, when installing the end cap body 2, the retaining ring 202 at the bottom edge of the end cap body 2 can be engaged in the retaining groove 102 on the outer wall of the cell housing 1. When disassembling, the retaining ring 202 is pried up first, and then the subsequent disassembly steps are carried out. At the same time, the first sealing ring 201 at the bottom of the end cap body 2 is embedded in the top groove 101 at the top of the cell housing 1. The first sealing ring 201 is deformed by the compression of the end cap body 2 and the cell housing 1, filling the gap between the top groove 101 and the end cap body 2. The first sealing ring 201 is made of fluororubber. Fluororubber has excellent high temperature resistance, oxidation resistance and chemical corrosion resistance. It can adapt to the temperature changes that may occur when the power cell is working, and it is not easy to age after long-term use, which can effectively ensure the sealing reliability of the end cap and the top of the housing.

[0034] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0035] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A cylindrical power supply core with a detachable end cap, comprising a core housing (1) and an end cap body (2), characterized in that, The bottom of the end cap body (2) is fixedly connected to a bottom post (203), and the side wall of the bottom post (203) is fixedly connected to an insert block (5). The inner side wall of the top opening of the battery cell housing (1) is provided with an insertion port (3). The bottom of the insertion port (3) is connected to the rotary groove (301) provided on the inner side wall of the battery cell housing (1), and the bottom of the rotary groove (301) is connected to the extrusion groove (302) provided on the inner side wall of the battery cell housing (1).

2. The cylindrical power supply core with a detachable end cap as described in claim 1, characterized in that, The top of the battery cell housing (1) is provided with a top groove (101), and the outer side wall of the battery cell housing (1) is provided with a groove (102) that surrounds it.

3. A cylindrical power supply core with a detachable end cap as described in claim 1, characterized in that, The bottom edge of the end cap body (2) is fixedly connected with a retaining ring (202) that surrounds it, and the bottom of the end cap body (2) is fixed with a No. 1 sealing ring (201) that surrounds it.

4. A cylindrical power supply core with a detachable end cap as described in claim 3, characterized in that, The end cap body (2) has an pole post (4) on its inner side. The upper and lower ends of the pole post (4) are located on the top surface of the end cap body (2) and the bottom surface of the bottom post (203), respectively. The pole post (4) is rotatably connected to the end cap body (2) and the bottom post (203), and the inner wall of the bottom post (203) is provided with an annular groove (7).

5. A cylindrical power supply core with a detachable end cap as described in claim 4, characterized in that, An arc-shaped magnet block (8) is fixedly connected to the side wall of the pole post (4), and the magnet block (8) is located inside the annular groove (7).

6. A cylindrical power supply core with a detachable end cap as described in claim 1, characterized in that, The top center of the insert (5) is provided with a limiting hole (501), and the top surface of the limiting hole (501) directly above the limiting hole (501) is provided with a storage groove (9). The inner side of the storage groove (9) is slidably connected to a limiting block (902).

7. A cylindrical power supply core with a detachable end cap as described in claim 6, characterized in that, The limiting block (902) is made of metal that can be attracted by the magnet (8), and a miniature spring (901) is fixedly connected between the top of the limiting block (902) and the inner top of the storage groove (9). The inner wall of the storage groove (9) is smoothly processed.

8. A cylindrical power supply core with a detachable end cap as described in claim 4, characterized in that, The lower end of the side wall of the pole post (4) is provided with a second sealing ring (6) at the part that contacts the bottom post (203), and the lower end of the side wall of the bottom post (203) is provided with a third sealing ring (10) at the part that contacts the inner wall of the cell casing (1).

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