Battery clamping equipment

Abstract

The present application discloses a battery clamping device, comprising: a clamping mechanism, comprising a first clamping part, a second clamping part and a driving part, the driving part connecting and driving the first clamping part and the second clamping part to move closer to or away from each other in a first direction; a protective film replacement mechanism, comprising two reeling and unreeling mechanisms provided corresponding to the first clamping part and the second clamping part, each reeling and unreeling mechanism comprising a first reel, a second reel and a protective film roll, one end of the protective film roll being wound on the first reel and the other end being wound on the second reel, the portion of the protective film roll between the first reel and the second reel being in close contact with the surface of one side of the first clamping part and the second clamping part opposite to each other in the first direction; as the first clamping part and the second clamping part move closer to or away from each other, the first reel and the second reel unreel or reel the protective film roll. In the clamping device of the present application, the protective film roll can move on the surface of the clamping part, which is conducive to automatic replacement of the protective film without the need for manual replacement, thereby effectively improving production efficiency.

Description

Technical Field

[0001] The present invention generally relates to the field of new energy equipment, and in particular to a battery clamping device. Background Art

[0002] In the field of battery production, top cover welding is a key process, which is used to weld the top cover of the battery cell to the shell. To ensure the welding effect, the contact part between the top cover and the shell is clamped with a clamp during welding. However, the large amount of sparks generated by laser welding can easily burn the surface of the clamp, and the direct contact between the clamp and the shell can easily leave scratches on the shell surface.

[0003] In the related art, a circle of adhesive tape is usually attached to the surface of the clamping part to protect the clamping part and the shell. In actual production, workers are required to frequently replace the adhesive tape, which seriously reduces production efficiency. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a battery clamping device that realizes automatic replacement of the protective film roll without manual operation, protects the clamping part and the battery shell, and effectively improves production efficiency.

[0005] In a first aspect, the present invention provides a battery clamping device, comprising:

[0006] The clamping mechanism includes a first clamping portion, a second clamping portion, and a driving portion, wherein the first clamping portion and the second clamping portion are arranged opposite to each other in a first direction, and the driving portion connects and drives the first clamping portion and the second clamping portion to move closer to or away from each other in the first direction;

[0007] The protective film replacement mechanism includes two reeling and unreeling mechanisms provided corresponding to the first clamping portion and the second clamping portion, each reeling and unreeling mechanism including a first reel, a second reel, and a protective film roll, one end of the protective film roll being wound around the first reel and the other end being wound around the second reel, a portion of the protective film roll located between the first reel and the second reel being in close contact with a surface of one side of the first clamping portion and the second clamping portion that is opposite in a first direction;

[0008] As the driving part drives the first clamping part and the second clamping part to move closer or farther away, the first reel and the second reel unwind or rewind the protective film roll to keep the protective film roll in close contact with the first clamping part and the second clamping part.

[0009] According to this solution, the clamping device can reliably clamp the battery shell, facilitating the welding of the battery shell and the top cover; the setting of the protective film roll effectively protects the clamping part from being burned by the laser surface, and at the same time effectively avoids the problem of scratches or wear on the shell surface caused by direct contact between the clamping part and the battery shell; and through the setting of the reeling and unreeling mechanism, the protective film is driven to move on the surface of the clamping part, which is conducive to automatic replacement of the protective film without manual replacement, effectively improving production efficiency.

[0010] As an optional solution, the first and second clamping portions include a first side surface, with a portion of the protective film roll covering the side of the first side surface. The first side surface refers to the side surface located vertically at the top of the first and second clamping portions. In this solution, the protective film roll covering the first side surface reliably protects the clamping portions from laser burns during laser welding of the top cover and battery housing, thereby extending the service life of the clamping device.

[0011] Alternatively, the first and second clamping portions may further include a second side surface vertically opposite the first side surface, with one of the first and second reels located on one side of the first side surface and the other on the other side of the second side surface. This solution facilitates installation while ensuring that the protective film roll covers the first side surface, protecting the clamping portion from laser burns. It also reliably separates the clamping portion from the battery housing, preventing wear of the battery housing.

[0012] As an optional solution, the first and second clamping portions further include third and fourth side surfaces disposed opposite each other in the second direction, the third and fourth side surfaces being located on either side of the first side surface, and one of the first and second reels being located on either side of the third side surface, while the other being located on either side of the fourth side surface. This solution allows for flexible positioning based on the actual equipment space, while reliably protecting the clamping portions and battery housing.

[0013] As an alternative, the area near the first side surface on the surfaces of the first and second clamping portions opposite each other in the first direction is configured as the first region, and the portion of the protective film roll between the first and second reels is in close contact with the first region. This solution helps conserve protective film rolls while reliably protecting the clamping portions from laser burns.

[0014] Alternatively, the remaining area on the surfaces of the first and second clamping parts, on opposite sides in the first direction, other than the first area, is configured as a second area, with the surface of the protective film roll facing away from the first and second clamping parts protruding above the plane of the second area. With this solution, the protective film roll separates the clamping parts from the battery casing, preventing contact between them. This protects the clamping parts from laser burns while also effectively protecting the battery casing from wear.

[0015] As an optional solution, the protective film replacement mechanism further includes a drive member, which is drivably connected to the first and second reels, respectively, to drive the first and second reels to rotate. This solution helps ensure that the reeling and unreeling mechanism can reliably rewind or unreel, thereby enabling the replacement of the protective film roll between the first and second clamping portions.

[0016] As an optional solution, the side edges of the first clamping portion and the second clamping portion are provided with rounded corners, and the rounded corners are formed at least on the side edges of the first clamping portion and the second clamping portion respectively contacting the protective film roll. According to this solution, the provision of the rounded corners is conducive to reducing the resistance to the movement of the protective film roll, making the protective film roll move smoothly, and at the same time preventing the side edges from damaging the protective film roll.

[0017] As an optional solution, the thickness of the protective film roll ranges from 0.1mm to 10mm. According to this solution, the protective film roll has a longer service life, reduces the replacement frequency, improves production efficiency and reduces production costs.

[0018] As an optional solution, the clamping mechanism further includes a third clamping portion and a fourth clamping portion, the third clamping portion and the fourth clamping portion being arranged relative to each other in the second direction, and the driving portion connecting and driving the third clamping portion and the fourth clamping portion to move closer together or farther apart in the second direction, wherein the second direction is perpendicular to the first direction. According to this solution, the clamping mechanism facilitates clamping the battery housing from different directions, ensuring the stability of the battery housing, and further facilitating reliable welding of the battery housing to the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 Schematic diagram of a square shell battery;

[0021] Figure 2 It is a schematic diagram of the assembly of the clamping device and the housing in the prior art;

[0022] Figure 3 is a schematic diagram of a clamping device according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the assembly of the clamping device and the housing according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the first clamping portion of an embodiment of the present invention (without the protective film roll);

[0025] Figure 6 Schematic diagram of the structure of the first clamping portion of an embodiment of the present invention (with a protective film roll);

[0026] Figure 7 FIG. 4 is another structural schematic diagram of the first clamping portion according to an embodiment of the present invention.

[0027] In the figure,

[0028] 1. Protective film

[0029] 100.Clamping equipment

[0030] 10. Clamping mechanism, 101. First clamping portion; 102. Second clamping portion, 103. Third clamping portion, 104. Fourth clamping portion, 105. Driving portion; a1. First side surface, a2. Second side surface, a3. Third side surface, a4. Fourth side surface, a5. Side edge, 111. First region, 112. Second region;

[0031] 20. Rewinding and unwinding mechanism, 21. First reel, 22. Second reel, 23. Protective film roll, S1. Surface;

[0032] 200. Shell, 201. Welding area, 202. Electrode assembly, 203. Top cover;

[0033] 300. Laser gun head. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the embodiments.

[0036] like Figure 1 and Figure 2 As shown, the battery cell includes a shell 200, an electrode assembly 202 and a top cover 203. The shell 200 has an opening, and the top cover 203 is used to close the opening of the shell 200, so that the shell 200 and the top cover together form a accommodating space for accommodating the electrode assembly 202. Generally, the shell 200 and the top cover 203 are welded to achieve the top cover 203 covering the opening of the shell 200. During the welding process, the shell 200 can be clamped by multiple clamping parts of the clamping device, and the clamping parts can limit the deformation of the shell. In order to avoid the laser burning the surface of the clamping part during the welding process and the contact between the clamping part and the shell, the shell is worn or scratches are generated on the shell, such as Figure 2 As shown, the prior art generally has a protective film 1 bonded to the surface of the clamping portion 10 facing the shell 200. However, with use, the protective film 1 will be damaged to varying degrees and needs to be replaced regularly. Since the protective film 1 is bonded to the surface of the clamping portion, it is generally replaced manually, which reduces work efficiency.

[0037] Based on the above problems, in the first aspect, an embodiment of the present invention provides a battery clamping device, comprising: a first clamping portion 101 and a second clamping portion 102 of a shell 200 for clamping a battery, a protective film roll 23 is tightly attached to the surface of the first clamping portion 101 and the second clamping portion 102 on the opposite side, and the protective film roll 23 can avoid the laser burning of the first clamping portion 101 and the second clamping portion 102 during the process of laser welding the top cover 203 and the shell 200, thereby protecting the first clamping portion 101 and the second clamping portion 102; on the other hand, the protective film roll 23 contacts the shell 200 to avoid the first clamping portion 101 and the second clamping portion 102 from being welded together. The clamping parts 102 are in direct contact with the shell 200, causing wear or scratches on the shell 200; thereby extending the service life of the clamping device and reducing the cost of maintenance and replacement of the clamping device; and, in the process of welding the battery shell 200 and the top cover 203, the first clamping part 101 and the second clamping part 102 of the clamping device cooperate to clamp the shell 200, and the first clamping part 101 and the second clamping part 102 can limit the wall of the shell 200, alleviate the deformation problem of the shell during welding, thereby improving the welding quality of the shell 200 and the top cover 203, thereby improving the production quality of the battery cell.

[0038] In addition, since the protective film roll 23 will be worn or damaged during long-term use, the protective film roll 23 needs to be replaced regularly. The protective film roll 23 of the present application can move on the surface of the first clamping part 101 and the second clamping part 102 during the unwinding and rewinding action of the rewinding and unwinding mechanism, and the protective film roll 23 is tightly attached to the surface of the side opposite to the first clamping part 101 and the second clamping part 102 under the action of the rewinding and unwinding mechanism, without the need for adhesive bonding, which is conducive to automatic replacement without manual replacement, thereby effectively improving production efficiency.

[0039] Specifically, if Figure 3-7 As shown, the battery clamping device includes:

[0040] The clamping mechanism 10 includes a first clamping portion 101, a second clamping portion 102, and a driving portion 105. The first clamping portion 101 and the second clamping portion 101 are arranged opposite to each other in a first direction. The driving portion 105 connects and drives the first clamping portion 101 and the second clamping portion 102 to move closer to or away from each other in the first direction.

[0041] The protective film replacement mechanism includes two reeling and unreeling mechanisms 20 provided corresponding to the first clamping portion 101 and the second clamping portion 102. Each reeling and unreeling mechanism 20 includes a first reel 21, a second reel 22, and a protective film roll 23. One end of the protective film roll 23 is wound around the first reel 21, and the other end is wound around the second reel 22. The portion of the protective film roll 23 located between the first reel 21 and the second reel 22 is in close contact with the surfaces of the first clamping portion 101 and the second clamping portion 102 on opposite sides in the first direction.

[0042] As the driving part 105 drives the first clamping part 101 and the second clamping part 102 to move closer or farther away, the first reel 21 and the second reel 22 unwind or rewind the protective film roll 23 to keep the protective film roll 23 in close contact with the first clamping part 101 and the second clamping part 102 .

[0043] It should be noted that the clamping device of the embodiment of the present application can be applied to battery cells of any shape, such as cylindrical, flat, rectangular or other shapes, and the embodiment of the present application is not limited to this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiment of the present application is not limited to this. Correspondingly, the clamping mechanism 10 is mainly used to squeeze the shell 200, so the shape of the clamping mechanism 10 can match the shape of the battery cell. For example, the surface of the first clamping part 101 and the second clamping part 102 facing the shell can be rectangular or arc-shaped, etc., and the embodiment of the present application is not limited to this. In order to ensure that the shell is evenly stressed and stably clamped, the clamping mechanism 10 is not limited to including the first clamping part 101 and the second clamping part 102. The clamping mechanism 10 can also include a third clamping part 103, a fourth clamping part 104, etc., which can be adjusted according to actual needs. Among them, the structures of the first clamping part 101, the second clamping part 102, the third clamping part 103 and the fourth clamping part 104 are exactly the same.

[0044] For example, Figure 1 and 2 As shown, the shell 200 of the battery cell is a rectangular parallelepiped, and the first clamping part 101, the second clamping part 102, the third clamping part 103 and the fourth clamping part 104 are respectively abutted against the four side walls of the shell 200 to achieve common clamping of the shell 200. The first clamping part 101, the second clamping part 102, the third clamping part 103 and the fourth clamping part 104 are arranged around the opening of the shell 200, and the top cover 203 covers the opening of the shell 200.

[0045] Among them, the driving part 105 can be various types of motors or cylinders, etc., as long as it can realize the driving of the first clamping part 101 and the second clamping part 102, ensuring that when the battery shell 200 needs to be clamped, the driving part 105 drives the first clamping part 101 and the second clamping part 102 to move closer to each other. After the battery welding is completed, the driving part 105 drives the first clamping part 101 and the second clamping part 102 away from each other, so as to facilitate the removal of the battery from the clamping device.

[0046] It can be understood that the protective film roll 23 is movably connected to the surfaces of the first clamping part 101 and the second clamping part 102, which is conducive to the movement of the protective film roll 23, thereby facilitating the replacement of the protective film roll 23. Therefore, the protective film roll 23 can be in direct contact with the surfaces of the first clamping part 101 and the second clamping part 102, and of course can also be connected through other movable connection methods; in a preferred embodiment, the reeling and unreeling mechanism includes a first reel 21, a second reel 22 and a protective film roll 23, one end of the protective film roll 23 is wound on the first reel 21, and the other end is wound on the second reel 22, which is conducive to realizing the movement and replacement of the protective film roll 20 while also fixing and limiting the protective film roll, so that the protective film roll 20 can always maintain stable contact with the surfaces of the first clamping part 101 and the second clamping part 102, without the use of glue or other fixing mechanisms, simplifying the structure and making it easy to use.

[0047] Among them, the protective film roll 23 can be arranged on the entire surface of the first clamping part 101 and the second clamping part 102, or the protective film roll 23 can be arranged only on the surface of the first clamping part 101 and the second clamping part 102 in the area close to the opening of the shell 200 (that is, the welding area 201). As long as the protection of the first clamping part 101 and the second clamping part 102 can be achieved, the embodiments of the present application do not make specific limitations on this.

[0048] It can also be understood that when the protective roll film 23 needs to be replaced, the driving part 105 drives the first clamping part 101 and the second clamping part 102 away, and the first reel 21 and the second reel 22 unwind or reel the protective film roll 23. Driven by the unwinding and reeling actions, the first reel 21 unwinds and releases the unused area on the protective roll film 23, while the second reel 22 reels the used area of ​​the protective roll film 23 and winds it around the second reel 22. The protective roll film 23 moves on the surface of the first clamping part 101 and the second clamping part 102, thereby realizing the replacement of the protective roll film 23 on the surface of the first clamping part 101 and the second clamping part 102, and due to the presence of the unwinding and reeling mechanism 20, it can be ensured that the protective film roll 23 is always in close contact with the first clamping part 101 and the second clamping part 102.

[0049] Among them, the first reel 21 and the second reel 22 can be arranged at positions on the two opposite sides of the first clamping part 101 and the second clamping part 102, so that the area on the protective film roll 23 where the first reel 21 unwinds, the area where the first clamping part 101 and the second clamping part 102 are located, and the area where the second reel 22 reels are located are always maintained in the same plane, and the protective film roll 23 moves in the plane where the surface of the clamping part 10 is located, reducing resistance and facilitating the replacement of the protective film roll 23; of course, the first reel 21 and the second reel 22 can also be set away from the sides of the first clamping part 101 and the second clamping part 102, and the moving path of the protective film roll 23 is to pass through the sides of the first clamping part 101 and the second clamping part 102, the surfaces of the first clamping part 101 and the second clamping part 102, and the other side of the first clamping part 101 and the second clamping part 102 in sequence; in actual processing, it is determined according to the installation space of the entire clamping equipment or the actual production requirements, and the embodiments of the present application do not limit this.

[0050] It can also be understood that in actual processing, one of the first reel 21 and the second reel 22 can be a driving wheel and the other can be a driven wheel; of course, the first reel 21 and the second reel 22 can also be independent reels, as long as it is ensured that the protective film roll 23 can be unwound and wound.

[0051] The clamping device of the present application solves the problem of low production efficiency caused by the need for manual replacement of protective film rolls in existing clamping devices. The present application, through the provision of a rewinding and unwinding mechanism, drives the protective film roll to move on the surfaces of the first clamping portion and the second clamping portion, achieving automatic replacement of the protective film roll without manual replacement, effectively improving production efficiency. Furthermore, the provision of the protective film roll effectively protects the clamping device from laser burns and effectively avoids scratches or wear on the shell surface caused by direct contact between the clamp and the battery cell shell, thereby improving battery quality.

[0052] In a preferred embodiment, Figure 5 and 6 As shown, the first clamping part 101 and the second clamping part 102 include a first side surface a1 , and a portion of the protective film roll 23 covers the first side surface a1 . The first side surface a1 refers to a side surface of the first clamping part 101 and the second clamping part 102 located at the top in the vertical direction.

[0053] It should be noted that in actual processing, the battery shell 200 is placed on a horizontal plane, and the opening of the shell 200 is located at the top in the vertical direction to facilitate welding of the top cover 203. Therefore, the first clamping part 101 and the second clamping part 102 are placed vertically when the battery shell 200 is normally clamped. The first side a1 refers to the side of the first clamping part 101 and the second clamping part 102 that is located at the top in the vertical direction. It is understood that the first side a1 refers to the side of the first clamping part 101 and the second clamping part 102 close to the opening of the battery shell 200.

[0054] It can be understood that a top cover 203 is provided at the opening of the shell 200, and the welding area 201 is the connection between the opening of the shell 200 and the top cover 203. In this way, the laser can more easily burn the first side a1 of the first clamping part 101 and the second clamping part 102, and a partial area of ​​the protective film roll 23 covers the first side a1, which is conducive to better protection of the clamping device 100.

[0055] In a specific embodiment, the protective film roll 23 is located in the area between the first reel 21 and the second reel 22. When it is tightly attached to the surfaces of the first clamping portion 101 and the second clamping portion 102, the protective film roll 23 can be protruded from the first side surface a1, that is, the edge of the protective film roll 23 exceeds the first side surface a1. When the first clamping portion 101 and the second clamping portion 102 clamp the shell 200, the protective film roll 23 is squeezed and the area protruding from the first side surface a1 is bent and covered on the first side surface a1, thereby protecting the first side surface a1.

[0056] Furthermore, in some embodiments, the first clamping portion 101 and the second clamping portion 102 also include a second side surface a2 vertically opposite to the first side surface a1, and one of the first reel 21 and the second reel 22 is located on one side of the first side surface a1, and the other is located on one side of the second side surface a2.

[0057] In this embodiment, the positions of the first reel and the second reel are simple to set, and can reliably protect the first side surface of the clamping part, that is, protect the area of ​​the clamping part close to the laser welding head, to prevent the clamping part from being burned by the laser, and reliably separate the first clamping part and the second clamping part from the battery shell, respectively, to prevent the battery shell from being worn.

[0058] As an achievable embodiment, the first clamping portion 101 and the second clamping portion 102 further include a third side surface a3 and a fourth side surface a4 disposed opposite each other in the second direction. The third side surface a3 and the fourth side surface a4 are located on either side of the first side surface a1. One of the first reel 21 and the second reel 22 is located on either side of the third side surface a3, and the other is located on either side of the fourth side surface a4. This embodiment flexibly adjusts the positions of the first and second reels according to actual needs, effectively protecting the surfaces of the clamping portion and the housing.

[0059] As an achievable method, Figure 7 As shown, the area near the first side surface a1 on the surfaces of the first clamping portion 101 and the second clamping portion 102 opposite each other in the first direction is configured as a first area 111. The portion of the protective film roll 23 located between the first reel 21 and the second reel 22 is in close contact with the first area 111. In this embodiment, the protective film roll is only provided in the first area 111, which helps save the protective film roll 23 while also protecting the first and second clamping portions from being burned by the laser.

[0060] Furthermore, other areas except the first area 111 on the surface of the first clamping part 101 and the second clamping part 102 on the side opposite to each other in the first direction are configured as the second area 112, and the surface S1 of the protective film roll 23 away from the first clamping part 101 and the second clamping part 102 protrudes from the plane where the second area 112 is located.

[0061] The surface S1 of the protective film roll 23 that is away from the first clamping part 101 and the second clamping part 102 protrudes from the plane where the second area 112 is located. This means that the surface S1 of the protective film roll 23 that is away from the first clamping part 101 and the second clamping part 102 is not coplanar with the plane where the second area 112 is located, and protrudes toward the direction of the shell 200. In this way, the protective film roll 23 not only protects the clamping part, but also helps to separate the second area 112 from the shell 200 (that is, no contact occurs), further avoiding wear or scratches caused by contact between the clamping part and the shell 200.

[0062] As an achievable method, the protective film replacement mechanism further includes a driving member, which is drivably connected to the first reel 21 and the second reel 22, respectively, for driving the first reel 21 and the second reel 22 to rotate. The driving member can be a motor, which can be connected to the first reel 21 and the second reel 22, respectively. The rotation speed of the motor should be as consistent as possible to ensure that the unwinding and rewinding of the protective film roll are synchronized, and that the protective film roll is replaced in time and the area on the surface of the clamping portion is flat. Of course, the first reel 21 can also serve as a driven wheel and the second reel 22 as a driving wheel, and the motor is drivably connected to the second reel 22. This embodiment is not limited to this. This embodiment is conducive to ensuring that the first reel 21 can reliably unwind the protective film roll 23 and the second reel 22 can reliably rewind the protective film roll 23.

[0063] In actual use, the frequency of the motor turning on or off can be set in advance (for example, it can be set according to the frequency of replacing the protective film roll 23 every N welding times (N is equal to 1 to 100)) to ensure that when the protective film roll 23 needs to be replaced, the motor automatically starts to replace the protective film roll 23, and automatically turns off after the replacement is completed, thereby realizing automatic replacement of the protective film roll 23.

[0064] In a preferred embodiment, the side edges a5 of the first clamping portion 101 and the second clamping portion 102 are configured as rounded corners. The rounded corners are formed at least on the side edges a5 of the first clamping portion 101 and the second clamping portion 102, respectively, where they contact the protective film roll 23. In this embodiment, the rounded corners help reduce resistance to the movement of the protective film roll, allowing for smooth movement of the protective film roll while also preventing damage to the protective film roll from the side edges.

[0065] As a feasible way, the thickness range of the protective film roll is 0.1mm-10mm. Specifically, the thickness of the protective film roll can be, but is not limited to, 0.1mm, 0.3mm, 0.7mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, or 10mm, etc. When the thickness of the protective film roll is less than 0.1mm, the protective film roll 23 can be quickly worn and damaged, the service life is short, and frequent replacement is required, which increases welding costs and reduces welding efficiency. When the thickness of the protective film roll is greater than 10.0mm, the thickness of the protective film roll 23 is large, resulting in material waste and increased costs. The thickness disclosed in this embodiment can not only make the protective film roll have a longer service life, reduce the replacement frequency, improve welding efficiency and reduce welding costs.

[0066] As an achievable method, the material of the protective film roll 23 is Teflon, polybenzimidazole, polyamide-imide, polyimide, or polyetheretherketone. The protective film roll material of this embodiment has good wear resistance and high temperature resistance. Any of these materials can ensure that the protective film roll has a longer service life, reduce replacement frequency, and thus reduce welding costs and improve welding efficiency.

[0067] In some embodiments, the clamping mechanism 10 also includes a third clamping portion 103 and a fourth clamping portion 104, and the third clamping portion 103 and the fourth clamping portion 104 are arranged relative to each other in the second direction. The driving portion 105 connects and drives the third clamping portion 103 and the fourth clamping portion 104 to move closer or farther away in the second direction, and the second direction is perpendicular to the first direction.

[0068] In this embodiment, the first clamping portion 101 and the second clamping portion 102 are arranged relative to each other in a first direction and can be used to abut against two opposing side walls of the housing 200 in the first direction. Furthermore, the third clamping portion 103 and the fourth clamping portion 104 are arranged relative to each other in a second direction and can be used to abut against two side walls of the housing 200 in the second direction. The first clamping portion 101, the second clamping portion 102, the third clamping portion 103, and the fourth clamping portion 104 can cooperate in pairs to clamp the housing 200 in mutually perpendicular directions, thereby effectively limiting deformation of the housing 200 during the welding process.

[0069] In summary, the clamping device of the present application drives the protective film roll to move on the surface of the clamping portion through the provision of a protective film roll replacement mechanism, thereby realizing automatic replacement of the protective film roll without the need for manual replacement, thereby effectively improving production efficiency. In addition, the provision of the protective film roll effectively protects the surface of the clamping device from being burned by the laser, and also effectively avoids the problem of scratches or wear on the surface of the shell caused by direct contact between the clamp and the battery cell shell, thereby improving battery quality.

[0070] Furthermore, the arrangement of the first reel and the second reel can help to reliably realize the movement of the protective film roll while also fixing and limiting the protective film roll so that the protective film roll can be stably maintained on the surface of the clamping portion.

[0071] In a second aspect, the present application provides a welding device comprising the clamping device of the first aspect. It will be appreciated that this welding device possesses all the features and advantages of the aforementioned clamping devices. In general, this welding device can effectively protect the clamping device, reduce clamping device replacement, and lower costs. It also reliably protects the battery casing surface, improves battery quality, and thereby enhances production and processing efficiency.

[0072] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A battery clamping device, characterized in that: include: The clamping mechanism includes a first clamping portion, a second clamping portion, and a driving portion, wherein the first clamping portion and the second clamping portion are arranged opposite to each other in a first direction, and the driving portion connects and drives the first clamping portion and the second clamping portion to move closer to or away from each other in the first direction; The protective film replacement mechanism includes two reeling and unreeling mechanisms provided corresponding to the first clamping portion and the second clamping portion, each of the reeling and unreeling mechanisms including a first reel, a second reel, and a protective film roll, one end of the protective film roll being wound around the first reel and the other end being wound around the second reel, a portion of the protective film roll located between the first reel and the second reel being in close contact with a surface of one side of the first clamping portion and the second clamping portion that is opposite in the first direction; As the driving part drives the first clamping part and the second clamping part to move closer or farther away, the first reel and the second reel unwind or rewind the protective film roll to keep the protective film roll in close contact with the first clamping part and the second clamping part.

2. The clamping device according to claim 1, characterized in that The first clamping portion and the second clamping portion include a first side surface, and a partial area of ​​the protective film roll covers the first side surface. The first side surface refers to a side surface of the first clamping portion and the second clamping portion located at the top in the vertical direction.

3. The clamping device according to claim 2, characterized in that The first clamping portion and the second clamping portion further include a second side surface opposite to the first side surface in the vertical direction. One of the first reel and the second reel is located on one side of the first side surface, and the other is located on one side of the second side surface.

4. The clamping device according to claim 2, characterized in that The first clamping portion and the second clamping portion also include a third side surface and a fourth side surface arranged opposite to each other in the second direction, the third side surface and the fourth side surface are located on both sides of the first side surface, and one of the first reel and the second reel is located on one side of the third side surface, and the other is located on one side of the fourth side surface.

5. The clamping device according to claim 4, characterized in that An area close to the first side surface on one side of the first clamping portion and the second clamping portion opposite to each other in the first direction is configured as a first area, and a portion of the protective film roll located between the first reel and the second reel is in close contact with the first area.

6. The clamping device according to claim 5, characterized in that The other areas except the first area on the surface of the first clamping part and the second clamping part opposite to each other in the first direction are configured as second areas, and the surface of the protective film roll away from the first clamping part and the second clamping part protrudes from the plane where the second area is located.

7. The clamping device according to any one of claims 1 to 6, characterized in that: The protective film replacement mechanism further includes a driving member, which is respectively connected to the first reel and the second reel for driving the first reel and the second reel to rotate.

8. The clamping device according to any one of claims 1 to 6, characterized in that: The side edges of the first clamping portion and the second clamping portion are configured as chamfered corners, and the chamfered corners are formed at least on the side edges of the first clamping portion and the second clamping portion respectively contacting the protective film roll.

9. The clamping device according to any one of claims 1 to 6, characterized in that: The thickness of the protective film roll ranges from 0.1 mm to 10 mm.

10. The clamping device according to any one of claims 4 to 6, characterized in that: The clamping mechanism also includes a third clamping part and a fourth clamping part, and the third clamping part and the fourth clamping part are arranged opposite to each other in the second direction. The driving part connects and drives the third clamping part and the fourth clamping part to move closer or farther away in the second direction, and the second direction is perpendicular to the first direction.

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