Battery clamping equipment

Abstract

The invention 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 being connected with and driving the first clamping part and the second clamping part to get close to or away from each other in a first direction; the protective film replacing mechanism comprises two winding and unwinding mechanisms corresponding to the first clamping part and the second clamping part, each winding and unwinding mechanism comprises a first winding wheel, a second winding wheel and a protective film roll, one end of each protective film roll is wound on the corresponding first winding wheel, and the other end of each protective film roll is wound on the corresponding second winding wheel; the part, located between the first rolling wheel and the second rolling wheel, of the protective film roll is tightly attached to the opposite side surfaces of the first clamping part and the second clamping part in the first direction. When the first clamping part and the second clamping part are close to or away from each other, the first winding wheel and the second winding wheel unwind or wind the protective film roll. According to the clamping equipment, the protective film roll can move on the surface of the clamping part, automatic replacement of the protective film is facilitated, manual replacement is not needed, and the production efficiency is effectively improved.

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 an important process, which is used to weld the top cover and shell of the battery cell. In order to ensure the welding effect, the contact part between the top cover and the shell of the battery cell is clamped with a clamp during welding, but the large amount of sparks generated by laser welding can easily burn the surface of the clamping part, and the direct contact between the clamping part and the shell can easily leave scratches on the shell surface.

[0003] In the related art, a circle of adhesive tape is usually pasted on 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 desirable 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 housing, and effectively improves production efficiency.

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

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

[0007] The protective film replacement mechanism comprises two reeling and unreeling mechanisms arranged corresponding to the first clamping portion and the second clamping portion, each reeling and unreeling mechanism comprises a first reel, a second reel and a protective film roll, one end of the protective film roll is wound on the first reel, and the other end is wound on the second reel, and a portion of the protective film roll located between the first reel and the second reel is in close contact with a surface of one side of the first clamping portion and the second clamping portion opposite to each other in the 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 scheme, 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 clamping part and the second clamping part include a first side surface, and a part of the protective film roll covers the side surface of the first side surface, and the first side surface refers to a side surface of the first clamping part and the second clamping part located at the top in the vertical direction. According to this solution, the protective film roll covers the first side surface, and during the laser welding process of the top cover and the battery shell, it can reliably ensure that the clamping part is not burned by the laser, thereby extending the service life of the clamping device.

[0011] As an optional solution, the first clamping part and the second clamping part further include a second side surface opposite to the first side surface in the vertical direction, and 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. According to this solution, it is convenient to set up, and at the same time, it can ensure that the protective film roll covers the first side surface to prevent the clamping part from being burned by the laser, and reliably separate the clamping part from the battery shell to prevent the battery shell from being worn.

[0012] As an optional solution, the first clamping part and the second clamping part further include a third side surface and a fourth side surface that are 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. According to this solution, the position can be flexibly adjusted according to the actual equipment space, while reliably protecting the clamping part and the battery housing.

[0013] As an optional solution, the area close to the first side surface on the side surface of the first clamping part and the second clamping part opposite to each other in the first direction is configured as the first area, and the part of the protective film roll located between the first reel and the second reel is in close contact with the first area. According to this solution, it is beneficial to save the protective film roll and can reliably protect the clamping part from being burned by the laser.

[0014] As an optional solution, the areas other than 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 the second area, 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. According to this solution, the protective film roll can separate the clamping part and the battery shell, avoiding contact between the clamping part and the battery shell, thereby protecting the clamping part from being burned by the laser and effectively protecting the battery shell from being worn.

[0015] As an optional solution, the protective film replacement mechanism further includes a driving member, which is connected to the first reel and the second reel respectively to drive the first reel and the second reel to rotate. According to this solution, it is helpful to ensure that the reeling and unreeling mechanism can reliably reel or unreel, thereby realizing the replacement of the protective film roll on the surface of the first clamping part and the second clamping part.

[0016] As an optional solution, the side edges of the first clamping part and the second clamping part are provided with rounded corners, and the rounded corners are formed at least on the side edges of the first clamping part and the second clamping part respectively contacting the protective film roll. According to this solution, the setting of the rounded corners is conducive to reducing the resistance of the protective film roll to move, so that the protective film roll moves smoothly, and at the same time, it can also prevent the side edges from damaging the protective film roll.

[0017] As an optional solution, the thickness of the protective film roll ranges from 0.1 mm to 10 mm. 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 are arranged opposite to each other in the second direction, the driving portion connects and drives the third clamping portion and the fourth clamping portion to move closer or farther away in the second direction, and the second direction is perpendicular to the first direction. According to this solution, the clamping mechanism is conducive to clamping the battery shell from different directions, ensuring the stability of the battery shell, and thus facilitating reliable welding of the battery shell and the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent by 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 It is a schematic diagram of assembling 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 part of an embodiment of the present invention (without the protective film roll);

[0025] Figure 6 It is a structural schematic diagram of the first clamping part of an embodiment of the present invention (with a protective film roll);

[0026] Figure 7 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 part; 102. Second clamping part, 103. Third clamping part, 104. Fourth clamping part, 105. Driving part; a1. First side surface, a2. Second side surface, a3. Third side surface, a4. Fourth side surface, a5. Side edge, 111. First area, 112. Second area;

[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 application is further described in detail below in conjunction with 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 with reference to the embodiments below.

[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 storage space for accommodating the electrode assembly 202. Generally, the shell 200 and the top cover 203 are welded to achieve that the top cover 203 covers the opening of the shell 200. During the welding process, the shell 200 can be clamped by a plurality of clamping parts of a 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 clamping part contacting with the shell, wearing the shell or causing scratches on the shell, such as Figure 2 As shown, in the prior art, a protective film 1 is generally bonded to the surface of the clamping part 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 part, 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 for clamping a battery shell 200, and 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. The protective film roll 23 can avoid the laser burning of the first clamping portion 101 and the second clamping portion 102 during the laser welding process of 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 is in contact with the shell 200 to avoid the first clamping portion 101 and the second clamping portion 102 from being welded. 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] Furthermore, since the protective film roll 23 may be worn or damaged during long-term use, it is necessary to replace the protective film roll 23 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 winding action of the winding 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 winding 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, Figure 3-7 As shown, the battery clamping device includes:

[0040] The clamping mechanism 10 comprises a first clamping portion 101, a second clamping portion 102 and a driving portion 105, wherein the first clamping portion 101 and the second clamping portion 101 are arranged opposite to each other in a first direction, and 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 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 on the first reel 21, and the other end is wound on 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 a surface of one side of the first clamping portion 101 and the second clamping portion 102 opposite to each other 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 cylinders, flat bodies, cuboids or other shapes, and the embodiment of the present application does not limit 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 does not limit 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 does not limit this; in order to make the shell force uniform and stably clamp the shell, the clamping mechanism 10 is not limited to including the first clamping part 101 and the second clamping part 102, and 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 portion 101, the second clamping portion 102, the third clamping portion 103 and the fourth clamping portion 104 are respectively abutted against the four side walls of the shell 200 to achieve common clamping of the shell 200. The first clamping portion 101, the second clamping portion 102, the third clamping portion 103 and the fourth clamping portion 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 beneficial 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, it can also be connected by other movable connection methods; in a preferred embodiment, the reeling and winding 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 beneficial to realize the movement and replacement of the protective film roll 20 while also fixing the protective film roll so that the protective film roll 20 can always be stably maintained in contact with the surfaces of the first clamping part 101 and the second clamping part 102, without the use of adhesive or other fixing mechanisms, simplifying the structure and facilitating 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 close to the opening of the shell 200 (that is, the welding area 201). As long as the first clamping part 101 and the second clamping part 102 can be protected, 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 to move 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, and at the same time, the second reel 22 reels the used area of ​​the protective roll film 23 and wraps it around the second reel 22. The protective roll film 23 moves on the surfaces of the first clamping part 101 and the second clamping part 102, thereby realizing the replacement of the protective roll film 23 on the surfaces 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 opposite to the two side surfaces 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 is unwound, the area where the first clamping part 101 and the second clamping part 102 are located, and the area where the second reel 22 is wound is 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, thereby 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 arranged to deviate from the side surfaces 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 side surfaces 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 surfaces 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 possible to achieve unwinding and winding of the protective film roll 23.

[0051] The clamping device of the embodiment of the present application solves the problem that the protective film roll of the existing clamping device needs to be replaced manually, resulting in low production efficiency. The embodiment of the present application drives the protective film roll to move on the surface of the first clamping part and the second clamping part through the setting of the reeling and unreeling mechanism, realizes automatic replacement of the protective film roll, and does not require manual replacement, effectively improving production efficiency; and the setting of the protective film roll effectively protects the clamping device from being burned by the laser, and also effectively avoids the problem of scratches or wear on the shell surface caused by direct contact between the clamp and the shell of the battery cell, thereby improving the quality of the battery.

[0052] In a preferred embodiment, Figure 5 and 6 As shown, the first clamping portion 101 and the second clamping portion 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 portion 101 and the second clamping portion 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, and 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 that is 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 out of 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 out of the first side surface a1 is bent and covers 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 further 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 simply 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, avoid the clamping part being burned by the laser, and reliably separate the first clamping part and the second clamping part from the battery shell, respectively, to avoid the battery shell being worn.

[0058] As an achievable manner, the first clamping portion 101 and the second clamping portion 102 further include a third side surface a3 and a fourth side surface a4 that are arranged opposite to each other in the second direction, the third side surface a3 and the fourth side surface a4 are located on both sides of the first side surface a1, and one of the first reel 21 and the second reel 22 is located on one side of the third side surface a3, and the other is located on one side of the fourth side surface a4. This embodiment flexibly adjusts the positions of the first reel and the second reel according to actual needs, and can effectively protect the surface of the clamping portion and the surface of the shell.

[0059] As an achievable method, Figure 7 As shown, the area near the first side surface a1 on the side surface of the first clamping portion 101 and the second clamping portion 102 opposite to each other in the first direction is configured as the first area 111, and the portion of the protective film roll 23 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 is beneficial to saving the protective film roll 23 and can also ensure that the first clamping portion and the second clamping portion are not 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 one 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 can not only protect the clamping part, but also help 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 also includes a driving member, which is connected to the first reel 21 and the second reel 22 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 motor speed should be as consistent as possible to ensure that the unwinding and winding of the protective film roll are carried out synchronously, 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 be used as a driven wheel, and the second reel 22 can be used as a driving wheel. The motor is connected to the second reel 22 for driving. This embodiment does not limit 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 wind up 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 starts automatically 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, and the rounded corners are formed at least on the side edges a5 where the first clamping portion 101 and the second clamping portion 102 are in contact with the protective film roll 23. In this embodiment, the rounded corners are formed to reduce the resistance to the movement of the protective film roll, so that the protective film roll moves smoothly, and at the same time, the side edges can be prevented from damaging the protective film roll.

[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 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 the welding cost and reduces the 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 the welding efficiency and reduce the welding cost.

[0066] As an achievable method, the material of the protective film roll 23 is Teflon, polybenzimidazole, polyamide-imide, polyimide or polyetheretherketone. The material of the protective film roll of this embodiment has good wear resistance and high temperature resistance. The material of the protective film roll can make the protective film roll have a longer service life, reduce the replacement frequency, and thus reduce the welding cost and improve the 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 relatively arranged 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 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 the first direction, and can be used to abut against two opposite side walls of the housing 200 in the first direction. In addition, the third clamping portion 103 and the fourth clamping portion 104 are arranged relative to each other in the 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 to clamp the housing 200 in pairs in a direction perpendicular to each other, so as to better limit the 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 part through the setting of the protective film roll replacement mechanism, realizes automatic replacement of the protective film roll, and does not require manual replacement, which effectively improves production efficiency; and the setting of the protective film roll effectively protects the clamping device from being burned by the laser, and also effectively avoids the problem of scratches or wear on the shell surface caused by direct contact between the clamp and the battery cell shell, thereby improving the battery quality;

[0070] Furthermore, the arrangement of the first winding wheel and the second winding wheel can help to reliably realize the movement of the protective film roll, and can also fix and limit 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, including the clamping device of the first aspect. It is understandable that the welding device has all the features and advantages of the clamping device described above. In general, the welding device can effectively protect the clamping device, reduce the replacement of the clamping device, reduce costs, and reliably protect the surface of the battery shell, improve the quality of the battery, and thus improve the production and processing efficiency.

[0072] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A battery clamping device, characterized in that: include: The clamping mechanism comprises 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 comprises two reeling and unreeling mechanisms arranged corresponding to the first clamping portion and the second clamping portion, each of the reeling and unreeling mechanisms comprises a first reel, a second reel and a protective film roll, one end of the protective film roll is wound on the first reel, and the other end is wound on the second reel, and a portion of the protective film roll located between the first reel and the second reel is in close contact with a surface of one side of the first clamping portion and the second clamping portion opposite to each other 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, a partial area of ​​the protective film roll covers the first side surface, and 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, and 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 surface 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 one side opposite to the first clamping part and the second clamping part 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 also includes a driving member, which is drivingly connected to the first reel and the second reel respectively to drive 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 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.

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 1 to 6, characterized in that: The clamping mechanism also includes a third clamping portion and a fourth clamping portion, and the third clamping portion and the fourth clamping portion are arranged opposite to each other in the second direction. The driving portion connects and drives the third clamping portion and the fourth clamping portion to move closer to or away from each other in the second direction, and the second direction is perpendicular to the first direction.

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