Special-shaped sealing machine

Abstract

The present application relates to the technical field of battery sealing devices, and relates in particular to a special-shaped sealing machine. The special-shaped sealing machine comprises a sealing device for sealing a battery. The sealing device comprises a first sealing portion and a second sealing portion movable toward or away from each other. Opposing sides of the first sealing portion and the second sealing portion are each provided with a first recess having a semi‑cylindrical shape. A protrusion is provided on a circumferential surface of the first recess, and a second recess is provided on the protrusion. A side of the protrusion close to a front surface of the sealing device serves as a pressing surface, and an intersection line between the pressing surface and an axial cross-section of a cylinder in which the first recess is located is an arc-shaped line. In the present application, by adjusting the pressing surface to be arc-shaped and providing the first recess for accommodating the tip of a tab adhesive, the arc-shaped pressing surface of the protrusion can effectively press an aluminum-plastic film onto a conical tab adhesive during a pressing process, thereby completing bonding of tab adhesives of different sizes, achieving compatibility with tab adhesives of different sizes, and improving the adaptability of the sealing machine.

Description

A type of irregular sealing machine

[0001] This application claims priority to Chinese utility model patent application number "202423182333.9", application date "December 23, 2024", entitled "An Irregularly Shaped Sealing Machine". Technical Field

[0002] This application relates to the field of battery sealing device technology, specifically to an irregularly shaped sealing machine. Background Technology

[0003] The purpose of pouch battery encapsulation is to completely isolate the inside of the battery cell from the outside using a high-barrier soft packaging material to maintain a vacuum, oxygen-free, and water-free environment, protecting the electrochemical reactions inside the battery cell. In existing technology, the sealing device for sealing the battery includes a first sealing part and a second sealing part that can move closer or further apart. The end of the battery to be sealed is placed between the first sealing part and the second sealing part, and then the first sealing part and the second sealing part are driven to move closer to each other, pressing the aluminum-plastic film onto the conical tab adhesive, thus completing the encapsulation of the end of the battery to be sealed. However, in this method, the pressing surface of the sealing device needs to strictly match the shape of the tab adhesive. When different shapes of tab adhesive are squeezed, the sealing device with different pressing surfaces needs to be replaced, otherwise the sealing effect will be affected and the fit will not be tight enough. Summary of the Invention

[0004] The purpose of this application is to provide an irregularly shaped sealing machine to solve the above-mentioned technical problems;

[0005] The technical problem solved by this application can be achieved using the following technical solutions:

[0006] A non-circular sealing machine includes a sealing device for sealing batteries. The sealing device includes a first sealing part and a second sealing part that can move closer to or further away from each other. The first sealing part and the second sealing part each have a semi-cylindrical first recess on their opposite sides. The first recess has a boss on its circumferential surface. The boss has a second recess. The side of the boss that is close to the front of the sealing device is a pressing surface. The intersection of the pressing surface and the axial section of the cylinder containing the first recess is an arc line.

[0007] In one embodiment, the protrusion is located on the side of the first recess near the back of the sealing device, and the pressing surface is at a certain depth from the front of the sealing device, forming a cavity for accommodating the end of the battery.

[0008] In one embodiment, the pressing surface is a concave arc-shaped surface.

[0009] In one embodiment, the two ends of the boss are flush with the surface of the first sealing portion or the second sealing portion.

[0010] In one embodiment, the battery is a cylindrical battery, and the end of the battery is provided with a conical tab adhesive. The tab of the battery extends from the tip of the tab adhesive, and the side of the battery is provided with an aluminum-plastic film to be sealed.

[0011] In one embodiment, the aluminum-plastic film has a cutout on one side near the end of the battery, and the cutout is in the shape of multiple triangles or parallelograms evenly distributed along the circumference of the end of the battery.

[0012] In one embodiment, the cut is in the shape of an isosceles triangle, or the cut is in the shape of a rhombus.

[0013] In one embodiment, the total area S of the cut is πrl / 2 < S < πrl.

[0014] Where r represents the cone radius of the tab adhesive, and l represents the cone generatrix length of the tab adhesive.

[0015] In one embodiment, a support frame is also included, which is disposed on one side of the front of the sealing device, and clamping holes for clamping the battery are provided between the frame bodies of the support frame.

[0016] In one embodiment, the support frame is rotatably connected to a rotating device with the axis of the clamping hole as the axis of rotation.

[0017] The beneficial effects of this application are as follows: By adopting the above technical solution, this application adjusts the pressing surface to an arc shape and sets a first recess for accommodating the tip of the tab adhesive. During the pressing process, the arc-shaped pressing surface of the boss can effectively press the aluminum-plastic film onto the conical tab adhesive, complete the bonding of tab adhesives of different sizes, realize the compatibility of tab adhesives of different sizes, and improve the adaptability of the sealing machine. Attached Figure Description

[0018] Figure 1 is a front view of the sealing device in an embodiment of this application;

[0019] Figure 2 is a schematic diagram of the structure of the second sealing part in an embodiment of this application;

[0020] Figure 3 is a schematic diagram of the longitudinal section of the battery in an embodiment of this application;

[0021] Figure 4 is a schematic diagram of the support frame in an embodiment of this application;

[0022] Figure 5 is a front view of the second sealing part in an embodiment of this application.

[0023] In the attached diagram: 1. Sealing device; 11. First sealing part; 12. Second sealing part; 2. Electrode hole; 3. First recess; 4. Boss; 5. Second recess; 6. Pressing surface; 7. Battery; 71. Electrode adhesive; 72. Electrode; 73. Aluminum-plastic film; 74. Cutting opening; 8. Support frame; 81. Clamping hole. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0026] The present application will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the application.

[0027] A non-circular sealing machine, as shown in Figures 1 to 5, includes a sealing device 1 for sealing a battery 7. The sealing device 1 includes a first sealing part 11 and a second sealing part 12 that can move closer to or further away from each other. The first sealing part 11 and the second sealing part 12 are each provided with a semi-cylindrical first recess 3 on their opposite sides. The first recess 3 is provided with a boss 4 on its circumferential surface. The boss 4 is provided with a second recess 5. The side of the boss 4 that is close to the front of the sealing device 1 is a pressing surface 6. The intersection of the pressing surface 6 and the axial section of the cylinder where the first recess 3 is located is an arc line.

[0028] Specifically, this application addresses the shortcomings of the prior art by adjusting the pressing surface 6 to an arc shape. Its arc structure can accommodate tab adhesives 71 of different sizes. During the sealing process of the battery 7, the end of the battery 7 is first placed between the first sealing part 11 and the second sealing part 12. Then, the first sealing part 11 and the second sealing part 12 are driven to move closer to each other. When the first sealing part 11 and the second sealing part 12 are attached, the first pits 3 on the first sealing part 11 and the second sealing part 12 together form a tab hole 2. At least a part of the tip of the tab adhesive 71 and the tab 72 extending from the tip of the tab adhesive 71 are located in the tab hole 2. The arc-shaped pressing surface 6 of the boss 4 presses the aluminum-plastic film 73 onto the conical tab adhesive 71, completing the encapsulation of the end of the battery 7 to be sealed.

[0029] In the prior art, the shape of the pressing surface needs to correspond to the conical tab adhesive 71. The axial section of the tab adhesive 71 is triangular. Therefore, in the prior art, the intersection of the pressing surface and the axial section of the circle where the first pit 3 is located is a line segment corresponding to the waist of the triangle. Therefore, when the battery 7 with different tab adhesives 71 is replaced, the shape of the pressing surface will not match the shape of the tab adhesive 71.

[0030] In one embodiment, the intersection of the pressing surface 6 and the axial section of the circle containing the first recess 3 is arc-shaped. Even with different sizes of tab adhesive 71, at least a portion of the tip of the tab adhesive 71 and the tab extending from the tip of the tab adhesive 71 will be located in the tab hole 2. Since the aluminum-plastic film 73 has a certain thickness, regardless of the slope of the bevel of the tab adhesive 71, the arc-shaped pressing surface 6 of the boss 4 will naturally press the aluminum-plastic film 73 onto the conical tab adhesive 71, thus completing the bonding of tab adhesive 71 of different sizes.

[0031] In one embodiment, the boss 4 is located on the side of the first recess 3 near the back of the sealing device 1, and the pressing surface 6 is at a certain depth from the front of the sealing device 1, forming a cavity for accommodating the end of the battery 7.

[0032] In one embodiment, the pressing surface 6 is a concave arc-shaped surface.

[0033] Specifically, the pressing surface 6 is a concave arc-shaped surface, which allows the end of the pressing surface 6 near the second recess 5 to contact the aluminum-plastic film 73 earlier than the middle part of the pressing surface 6. During pressing, the end of the pressing surface 6 near the second recess 5 provides additional pressing force to the aluminum-plastic film 73, providing a better pressing effect.

[0034] More specifically, during pressing, the aluminum-plastic film 73 is usually located between the two ends of the pressing surface 6. Of course, in other embodiments, the aluminum-plastic film 73 may also extend beyond the pressing surface 6 and approach one end of the second recess 5. After pressing, an additional cutting step can be performed.

[0035] In one embodiment, the two ends of the boss 4 are flush with the surface of the first sealing portion 11 or the second sealing portion 12.

[0036] Specifically, when the first sealing part 11 and the second sealing part 12 are attached, the first pit 3 on the first sealing part 11 and the second sealing part 12 together form a tab hole 2; at least a portion of the tip of the tab adhesive 71 and the tab 72 extending from the tip of the tab adhesive 71 are located in the tab hole 2.

[0037] In one embodiment, the battery 7 is a cylindrical battery, and the end of the battery 7 is provided with a conical tab adhesive 71. The tab 72 of the battery 7 extends out from the tip of the tab adhesive 71, and the side of the battery 7 is provided with an aluminum-plastic film 73 to be sealed.

[0038] In one embodiment, the aluminum-plastic film 73 has a cutout on one side near the end of the battery 7. The cutout is in the shape of multiple triangles or parallelograms evenly distributed along the circumference of the end of the battery 7.

[0039] In one embodiment, the cut is shaped like an isosceles triangle, or the cut is shaped like a rhombus.

[0040] In one embodiment, the total area S of the cut 74 is πrl / 2 < S < πrl.

[0041] Where r represents the cone radius of the tab adhesive 71, and l represents the cone generatrix length of the tab adhesive 71.

[0042] Specifically, before sealing, the aluminum-plastic film 73 needs to be cut using a cutting machine. In the prior art, the cuts on the side of the aluminum-plastic film 73 near the end of the battery 7 are usually uniformly distributed rectangles. This causes interference between adjacent rectangles when the cuts with multiple rectangles are attached to the conical tab adhesive 71 after pressing, resulting in overlap and wrinkles. Based on this, this application improves the shape of the cuts of the aluminum-plastic film 73 by cutting the cuts 74 into uniformly distributed triangles or parallelograms. In one embodiment, the shape of the cuts 74 is an isosceles triangle or rhombus, and the total area of ​​the cuts is controlled so that overlap is avoided when the cuts are attached to the tab adhesive 71 during pressing.

[0043] In one embodiment, as shown in FIG4, a support frame 8 is also included. The support frame 8 is disposed on one side of the front of the sealing device 1, and clamping holes 81 for clamping the battery 7 are provided between the frame bodies of the support frame 8.

[0044] In one embodiment, the support frame 8 is rotatably connected to a rotating device with the axis of the clamping hole 81 as the axis of rotation.

[0045] Specifically, in the prior art, the first sealing part 11 and the second sealing part 12 are directly driven to move closer to each other to seal the battery 7. This places high demands on the sealing structure of the sealing machine. If the shape of the seal is not regular enough, the sealing effect will be uneven, resulting in a loose fit and wrinkles. Based on this, this application drives the first sealing part 11 and the second sealing part 12 to move closer to each other. As the first sealing part 11 and the second sealing part 12 gradually come together, the arc-shaped pressing surface 6 gradually presses the aluminum-plastic film 73 onto the conical tab adhesive 71. At the same time, the support frame 8 rotates the battery 7 at a certain speed, so that the battery 7 is sealed while rotating. This achieves the function of smoothing the cut edge, thereby optimizing the sealing effect and avoiding wrinkles.

[0046] More specifically, the rotating device uses a motor, and the output shaft of the motor rotates around the center of the clamping hole 81. The output shaft of the motor is connected to the support frame 8 through a connecting assembly, so that the support frame 8 rotates around the center of the clamping hole 81.

[0047] The above descriptions are merely some embodiments of this application and do not limit the implementation methods and protection scope of this application. Those skilled in the art should realize that any equivalent substitutions and obvious changes made using the description and illustrations of this application should be included within the protection scope of this application.

Claims

1. A shaped sealing machine, comprising a sealing device (1) for sealing a battery (7), said sealing device (1) comprising a first sealing part (11) and a second sealing part (12) movable toward or away from each other, characterized in that, The first sealing part (11) and the second sealing part (12) each have a semi-cylindrical first recess (3) on their opposite sides. The first recess (3) has a boss (4) on its circumferential surface. The boss (4) has a second recess (5). The side of the boss (4) closest to the front of the sealing device (1) is a pressing surface (6). The intersection of the pressing surface (6) and the axial section of the cylinder where the first recess (3) is located is an arc line.

2. The irregular-shaped sealing machine according to claim 1, characterized in that, The protrusion (4) is located on the side of the first recess (3) near the back of the sealing device (1), and the pressing surface (6) is a certain depth away from the front of the sealing device (1) to form a cavity for accommodating the end of the battery (7).

3. The irregular-shaped sealing machine according to claim 1, characterized in that, The pressing surface (6) is a concave arc-shaped surface.

4. The irregular-shaped sealing machine according to claim 1, characterized in that, The two ends of the boss (4) are flush with the surface of the first sealing part (11) or the second sealing part (12).

5. The irregular-shaped sealing machine according to claim 1, characterized in that, The battery (7) is a cylindrical battery. The end of the battery (7) is provided with a conical tab adhesive (71). The tab (72) of the battery (7) is led out from the tip of the tab adhesive (71). The side of the battery (7) is provided with an aluminum-plastic film (73) to be sealed.

6. The irregular-shaped sealing machine according to claim 5, characterized in that, The aluminum-plastic film (73) has a cutout on one side near the end of the battery (7), and the cutout is a plurality of triangles or parallelograms evenly distributed along the circumferential direction of the end of the battery (7).

7. The irregular-shaped sealing machine according to claim 6, characterized in that, The cut is in the shape of an isosceles triangle, or the cut is in the shape of a rhombus.

8. The irregular-shaped sealing machine according to claim 6, characterized in that, The total area S of the cut is given by: πrl / 2 < S < πrl Where r represents the cone radius of the tab adhesive (71), and l represents the cone generatrix length of the tab adhesive (71).

9. The irregular-shaped sealing machine according to claim 1, characterized in that, It also includes a support frame (8), which is located on one side of the front of the sealing device (1), and the frame of the support frame (8) is provided with clamping holes (81) for clamping the battery (7).

10. The irregular-shaped sealing machine according to claim 9, characterized in that, The support frame (8) is rotatably connected to a rotating device with the axis of the clamping hole (81) as the axis of rotation.

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