Cylindrical battery sealing and forming device

Abstract

The utility model relates to the technical field of battery sealing, in particular to a cylindrical battery sealing forming device which comprises a top plate, a sealing forming body, an elastic piece, a positioning sleeve and a pressing head, the sealing forming body is provided with a containing hole, a sliding hole and a sealing bending forming hole, the top plate covers a top end opening of the containing hole, and the pressing head penetrates through the sliding hole and the sealing bending forming hole in a sliding mode. A limiting plate is arranged at the top of the pressing head and slidably arranged in the containing hole, the elastic piece is located in the containing hole, the two ends of the elastic piece elastically abut against the top face of the limiting plate and the bottom face of the top plate respectively, the bottom of the sealing forming body is sleeved with the positioning sleeve, and a positioning hole is defined by an inner hole of the positioning sleeve and the bottom end face of the sealing forming body. Before the cylindrical battery is sealed and bent, the top of the clamp extends into the positioning hole, the position precision of the clamp and the device is guaranteed, the top face of the cylindrical battery is pressed through the pressing head to guarantee the stability of the battery, and therefore the sealing and bending quality of the cylindrical battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery sealing technology, and in particular to a cylindrical battery sealing and forming device. Background Technology

[0002] The sealing technology of cylindrical batteries is crucial to battery performance. With technological advancements, sealing processes and materials have been continuously optimized, improving battery reliability and safety. In the processing of cylindrical batteries, after completing cell insertion, current collector welding, and tab bending, a flanging and sealing operation is required to complete the battery encapsulation and prepare it for market use. Existing patents, such as Chinese patent application number 201611167182.7, disclose a sealing assembly upper mold for cylindrical steel-cased lithium batteries, including an inner mold. The inner mold is characterized by a hollow cylindrical structure. From top to bottom, the inner mold includes an upper mold base, a hard rubber pad, a mold base, and a mold. The inner mold includes a stamping head and a fixing handle. The outer diameter of the stamping head is larger than the outer diameter of the fixing handle. The mold base has stepped holes with inner diameters decreasing from large to small, divided into a first diameter, a second diameter, and a third diameter. The mold is fixedly installed within the first diameter, the second diameter cooperates with the stamping head, and the third diameter cooperates with the fixing handle. In the process of sealing a cylindrical battery, the patent document describes a method where the battery first contacts the battery insertion groove of the sleeve mold and undergoes slight inward deformation before contacting the stamping head of the inner mold. However, before the battery is inserted into the battery insertion groove of the sleeve mold, it is difficult to guarantee the positional accuracy between the upper mold and the battery in the cylindrical steel-cased lithium battery sealing assembly, thus making it difficult to ensure the quality of battery sealing. Therefore, the defects are quite obvious, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a cylindrical battery sealing and forming device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A cylindrical battery sealing and forming device includes a top plate, a sealing forming body, an elastic element, a positioning sleeve, and a pressure head. The sealing forming body has a receiving hole, a sliding hole, and a sealing bending forming hole arranged sequentially from top to bottom along its axial direction. The sealing forming body is mounted on the top plate, which covers the top port of the receiving hole. The pressure head slides through the sliding hole and the sealing bending forming hole. A limit plate is provided on the top of the pressure head and is slidably disposed in the receiving hole. The elastic element is located in the receiving hole, and its two ends elastically abut against the top surface of the limit plate and the bottom surface of the top plate, respectively. The positioning sleeve is fitted outside the bottom of the sealing forming body, and the inner hole of the positioning sleeve and the bottom end face of the sealing forming body form a positioning hole. When the elastic element is in an extended state, the bottom surface of the limit plate abuts against the inner bottom wall of the receiving hole, and the bottom end of the pressure head extends into the positioning hole.

[0006] Furthermore, the elastic element is a spring.

[0007] Furthermore, a positioning post is protruding from the top surface of the limiting plate, and the bottom of the spring is sleeved on the positioning post.

[0008] Furthermore, a fixing hole is recessed on the bottom surface of the top plate, and the top of the spring extends into the fixing hole.

[0009] Furthermore, the bottom sidewall of the sealing molded body is provided with external threads, and the inner wall of the positioning sleeve is provided with internal threads that are screwed into the external threads.

[0010] Furthermore, the bottom of the sealing molded body is provided with an outer step, which is located below the external thread. The inner wall of the positioning sleeve is provided with an inner step, which is used to abut against the outer step.

[0011] Furthermore, the outer wall of the positioning sleeve is recessed with a disassembly hole.

[0012] Furthermore, the top plate is detachably connected to the sealing molded body via fasteners.

[0013] Furthermore, the inner wall of the sealing and bending forming hole is provided with a sealing and bending forming arc surface.

[0014] Furthermore, a limiting surface is provided at the bottom of the sealing molded body. The limiting surface is located above the external thread and is used to abut against the top surface of the positioning sleeve.

[0015] The beneficial effects of this utility model are as follows: In practical applications, the top plate is mounted on an external mechanism. When the cylindrical battery fixed by the clamp is positioned vertically and vertically corresponding to this utility model, the bent edge of the cylindrical battery to be sealed extends beyond the top surface of the clamp. The cylindrical battery to be sealed and bent, fixed by the clamp, gradually approaches this utility model. During this process, the top of the clamp extends into the positioning hole. Through the interlocking of the top of the clamp and the positioning hole, the positional accuracy of the clamp and this utility model and the stability of the sealing and bending process are improved. The bottom surface of the pressure head presses against the center of the top surface of the cylindrical battery. As the two gradually approach each other, the pressure head is subjected to upward pressure and moves upward along the sliding hole. The elastic element is moved and compressed. Simultaneously, the inner wall of the sealing and bending forming hole abuts against the cylindrical battery's edge to be sealed, thus bending the edge of the cylindrical battery inward towards the center of the top surface. This sealing and bending process continues until the bottom surface of the sealed form contacts the top surface of the fixture. After the sealing and bending process is complete, the fixture gradually moves away from the device, the elastic element recovers its elasticity, and the pressure head moves down and resets under the rebound force of the elastic element, preparing for the sealing and bending of the next cylindrical battery. The pressure head can also push the sealed and bent battery away from the sealing and bending forming hole of the sealing form. Before sealing and bending the cylindrical battery, the top of the fixture extends into the positioning hole, ensuring the positional accuracy of the fixture and the device. The pressure head presses the top surface of the cylindrical battery to ensure its stability, thereby improving the quality of the sealing and bending process. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention after the top plate is hidden.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Top plate; 2. Sealing forming body; 3. Elastic element; 4. Positioning sleeve; 5. Press head; 6. Accommodating hole; 7. Sliding hole; 8. Sealing bending forming hole; 9. Limiting plate; 10. Positioning hole; 11. Positioning post; 12. Fixing hole; 15. Outer step; 16. Inner step; 17. Disassembly hole; 18. Sealing bending forming arc surface; 19. Limiting surface. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0021] like Figure 1 and Figure 2As shown, this utility model provides a cylindrical battery sealing and forming device, which includes a top plate 1, a sealing forming body 2, an elastic element 3, a positioning sleeve 4, and a pressure head 5. The sealing forming body 2 has a receiving hole 6, a sliding hole 7, and a sealing bending forming hole 8 arranged sequentially from top to bottom along its axial direction. The sealing forming body 2 is installed on the top plate 1, and the top plate 1 covers the top port of the receiving hole 6. The pressure head 5 slides through the sliding hole 7 and the sealing bending forming hole 8. A limit plate 9 is provided on the top of the pressure head 5. The limiting plate 9 is slidably disposed in the receiving hole 6, the elastic element 3 is located in the receiving hole 6, and the two ends of the elastic element 3 elastically abut against the top surface of the limiting plate 9 and the bottom surface of the top plate 1, respectively. The positioning sleeve 4 is fitted outside the bottom of the sealing molding body 2, and the inner hole of the positioning sleeve 4 and the bottom end face of the sealing molding body 2 form a positioning hole 10. When the elastic element 3 is in the extended state, the bottom surface of the limiting plate 9 abuts against the inner bottom wall of the receiving hole 6, and the bottom end of the pressure head 5 extends into the positioning hole 10.

[0022] In practical applications, the top plate 1 is mounted on an external mechanism. When the cylindrical battery fixed by the clamp is positioned vertically opposite to this invention, the bent edge of the cylindrical battery to be sealed extends beyond the top surface of the clamp. The cylindrical battery to be sealed and bent, fixed by the clamp, gradually approaches this invention. During this process, the top of the clamp extends into the positioning hole 10. Through the interlocking of the top of the clamp and the positioning hole 10, the positional accuracy of the clamp and this invention and the stability of the sealing and bending process are improved. The bottom surface of the pressure head 5 presses against the center of the top surface of the cylindrical battery. As the two gradually approach each other, the pressure head 5 is subjected to upward pressure and moves upward along the sliding hole 7, compressing the spring. Meanwhile, the inner wall of the sealing bending forming hole 8 abuts against the cylindrical battery's bent edge to be sealed, so that the cylindrical battery's bent edge is bent inward towards the center of the top surface of the cylindrical battery, thus achieving the sealing bending process of the cylindrical battery. This continues until the bottom end face of the sealing forming body 2 abuts against the top surface of the fixture, completing the sealing bending process. After this, the fixture gradually moves away from the present invention, the elastic element 3 will elastically recover, and the pressure head 5 will move down and reset under the action of the elastic force of the elastic element 3, preparing for the present invention to seal and bend the next cylindrical battery. The pressure head 5 can also push the sealed and bent battery away from the sealing bending forming hole 8 of the sealing forming body 2. Before sealing and bending the cylindrical battery, the top of the clamp extends into the positioning hole 10, ensuring the positional accuracy of the clamp and the device, thereby ensuring the positional accuracy of the battery and the device. Furthermore, the pressure head 5 presses the top surface of the cylindrical battery to ensure the stability of the battery, thus improving the quality of sealing and bending the cylindrical battery.

[0023] In this embodiment, the elastic element 3 is a spring.

[0024] In this embodiment, a positioning post 11 protrudes from the top surface of the limiting plate 9, and the bottom of the spring is sleeved on the positioning post 11. The positioning post 11 serves to guide and position the spring, facilitating the assembly and disassembly of the spring and improving the spring's positional accuracy and operational stability.

[0025] In this embodiment, a fixing hole 12 is recessed on the bottom surface of the top plate 1. The top of the spring extends into the fixing hole 12. The fixing hole 12 plays a positioning role for the spring, which facilitates the assembly and disassembly of the spring and improves the positional accuracy and working stability of the spring.

[0026] In this embodiment, the bottom sidewall of the sealing molding body 2 is provided with external threads, and the inner wall of the positioning sleeve 4 is provided with internal threads that are screwed into the external threads. This structural design facilitates the assembly and disassembly of the sealing molding body 2 and the positioning sleeve 4, and ensures a secure assembly between the sealing molding body 2 and the positioning sleeve 4.

[0027] In this embodiment, the bottom of the sealing molding body 2 is provided with an outer step 15, which is located below the external thread. The inner wall of the positioning sleeve 4 is provided with an inner step 16, which is used to abut against the outer step 15. During assembly, the abutment between the outer step 15 and the inner step 16 ensures the positional accuracy of the sealing molding body 2 and the positioning sleeve 4, and avoids over-assembly that could damage the threads.

[0028] In this embodiment, the outer wall of the positioning sleeve 4 is recessed with a disassembly hole 17. When disassembling or assembling the positioning sleeve 4, a disassembly or assembly tool (such as a plug rod) is inserted into the disassembly or assembly hole 17, and the positioning sleeve 4 is rotated by the disassembly or assembly tool to screw the positioning sleeve 4, thereby facilitating the disassembly or assembly of the positioning sleeve 4.

[0029] In this embodiment, the top plate 1 is detachably connected to the sealing molding body 2 via a locking fastener; specifically, the locking fastener can be a bolt. This structural design makes the connection between the top plate 1 and the sealing molding body 2 firm and easy to assemble and disassemble.

[0030] In this embodiment, the inner wall of the sealing and bending forming hole 8 is provided with a sealing and bending forming arc surface 18. This structural design facilitates the stable sealing and bending forming of the cylindrical battery's sealing and bending edge.

[0031] In this embodiment, a limiting surface 19 is provided at the bottom of the sealing molding body 2. The limiting surface 19 is located above the external thread and is used to abut against the top surface of the positioning sleeve 4. When the positioning sleeve 4 and the sealing molding body 2 are assembled in place, the limiting surface 19 abuts against the top surface of the positioning sleeve 4 to limit the positioning sleeve 4 and prevent the positioning sleeve 4 from being over-assembled with the sealing molding body 2 and damaging the thread.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A cylindrical battery sealing and forming device, characterized in that: The sealing body (2) includes a top plate (1), a sealing forming body (2), an elastic element (3), a positioning sleeve (4), and a pressure head (5). The sealing forming body (2) has, from top to bottom, a receiving hole (6), a sliding hole (7), and a sealing bending forming hole (8). The sealing forming body (2) is mounted on the top plate (1), which covers the top end of the receiving hole (6). The pressure head (5) slides through the sliding hole (7) and the sealing bending forming hole (8). A limiting plate (9) is provided at the top of the pressure head (5), and the limiting plate (9) is slidably positioned on... Inside the receiving hole (6), the elastic element (3) is located inside the receiving hole (6). The two ends of the elastic element (3) elastically abut against the top surface of the limiting plate (9) and the bottom surface of the top plate (1), respectively. The positioning sleeve (4) is fitted outside the bottom of the sealing molding body (2). The inner hole of the positioning sleeve (4) and the bottom end face of the sealing molding body (2) form a positioning hole (10). When the elastic element (3) is in the extended state, the bottom surface of the limiting plate (9) abuts against the inner bottom wall of the receiving hole (6), and the bottom end of the pressure head (5) extends into the positioning hole (10).

2. The cylindrical battery sealing and forming device according to claim 1, characterized in that: The elastic element (3) is a spring.

3. The cylindrical battery sealing and forming device according to claim 2, characterized in that: The top surface of the limiting plate (9) is provided with a positioning post (11), and the bottom of the spring is sleeved on the positioning post (11).

4. The cylindrical battery sealing and forming device according to claim 3, characterized in that: The bottom surface of the top plate (1) is recessed with a fixing hole (12), and the top of the spring extends into the fixing hole (12).

5. The cylindrical battery sealing and forming device according to claim 1, characterized in that: The bottom sidewall of the sealing molding body (2) is provided with external threads, and the inner wall of the positioning sleeve (4) is provided with internal threads that are screwed into the external threads.

6. The cylindrical battery sealing and forming device according to claim 5, characterized in that: The bottom of the sealing molding body (2) is provided with an outer step (15), which is located below the external thread. The inner wall of the positioning sleeve (4) is provided with an inner step (16), which is used to abut against the outer step (15).

7. The cylindrical battery sealing and forming device according to claim 5, characterized in that: The outer side wall of the positioning sleeve (4) is recessed with a disassembly hole (17).

8. The cylindrical battery sealing and forming device according to claim 1, characterized in that: The top plate (1) is detachably connected to the sealing molding body (2) via fasteners.

9. The cylindrical battery sealing and forming device according to claim 1, characterized in that: The inner wall of the sealing and bending forming hole (8) is provided with a sealing and bending forming arc surface (18).

10. A cylindrical battery sealing and forming device according to claim 5, characterized in that: The bottom of the sealing molding body (2) is provided with a limiting surface (19), which is located above the external thread and is used to abut against the top surface of the positioning sleeve (4).

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