Welding fixture, welding apparatus, and welding method

Abstract

The application discloses a welding fixture, welding equipment and welding method, wherein the welding fixture is used for welding a film material and a product, the welding fixture comprises a press-fit piece, the press-fit piece has a press-fit surface, the press-fit surface is used for abutting and pressing a side of the film material away from the product, the press-fit surface is provided with an irradiation channel, the irradiation channel penetrates through the press-fit piece, and laser irradiates the film material after passing through the irradiation channel. The welding method comprises the following steps: a press-fitting step, the press-fit piece presses the film material to the product, and the press-fit surface abuts and presses the film material; a cutting step, the film material is cut to form a cutting seam, and the cutting seam is located in the irradiation channel; and a welding step, laser irradiates the film material and the product after passing through the irradiation channel, a welding seam is formed, and the welding seam is arranged around the cutting seam. The welding fixture, the welding equipment and the welding method can improve the welding efficiency and the welding quality simultaneously.

Description

Technical Field

[0001] This invention relates to the technical field of battery manufacturing, and in particular to a welding fixture, welding equipment, and welding method. Background Technology

[0002] Mylar membranes are a common material in batteries, used to protect the positive and negative electrodes.

[0003] During battery production, the mylar film can be welded and fixed onto the product using hot melt welding or laser welding.

[0004] Hot melt welding is a welding process that combines extrusion and heat conduction. In other words, the mylar film is heated and melted, and then extruded to adhere tightly to the product to be welded.

[0005] Laser welding involves irradiating the interface between the Mylar film and the product with a laser, causing the film layer of the Mylar film that is attached to the product to melt and weld together with the product to be welded.

[0006] However, hot melt welding is inefficient and prone to quality problems such as wire drawing, while laser welding produces overflow, that is, the molten material overflows into areas outside the welding position, affecting the yield of subsequent processes, making it difficult to balance welding efficiency and welding quality. Summary of the Invention

[0007] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a welding fixture that can simultaneously improve welding efficiency and welding quality.

[0008] The present invention also proposes a welding device having the above-mentioned welding fixture.

[0009] The present invention also proposes a welding method using the welding equipment described above.

[0010] According to a first aspect of the present invention, a welding fixture is used to weld a film material to a product. The welding fixture includes a pressing member having a pressing surface for fitting and pressing the film material against the product side. The pressing surface is provided with an irradiation channel that penetrates the pressing member, and a laser passes through the irradiation channel to irradiate the film material.

[0011] The welding fixture according to embodiments of the present invention has at least the following beneficial effects:

[0012] This invention provides a pressing component with a pressing surface. Therefore, when welding a film material such as a mylar film is required, the pressing surface compresses the film material, which helps reduce the possibility of molten material and gas generated during melting overflowing to the periphery of the pressing surface, thus improving the welding quality.

[0013] This invention sets up an irradiation channel so that the laser passes through the irradiation channel and irradiates the film material. Therefore, the area of ​​laser welding is limited to the inside or inner side of the pressing surface. This does not affect the welding, and the pressing surface can be used to squeeze the film material to prevent the molten material and the gas generated by melting from overflowing out of the pressing surface, thereby improving the welding quality.

[0014] This invention uses laser welding to avoid direct heating of the press-fit parts, thus avoiding the problem of film material stringing and overcoming the defects caused by hot melt welding.

[0015] This invention uses laser welding to directly heat the area to be welded, reducing the time spent on heat conduction and improving welding efficiency. Consequently, it can simultaneously improve both welding quality and welding efficiency.

[0016] The present invention also provides a welding device that has the above-mentioned beneficial effects.

[0017] According to a first aspect of the present invention, a welding fixture includes a pressing mechanism, the pressing mechanism including a liftable pressing seat, and the pressing element being detachably disposed at the bottom of the pressing seat.

[0018] According to a first aspect of the present invention, the welding fixture is provided with a mounting groove, the mounting groove is open downwards, the mounting groove is used to mount the mounting component, and the bottom of the mounting groove is provided with a through-hole communicating with the irradiation channel, and the laser irradiates the film material after passing through the through-hole and the irradiation channel.

[0019] According to a first aspect of the invention, in the welding fixture, the pressing surface of the pressing member is higher than the mounting groove;

[0020] And / or, one side of the mounting slot is open.

[0021] According to a first aspect of the present invention, the bottom of the mounting groove is provided with a mounting hole for mounting the press-fit component;

[0022] And / or, the inner surface of the mounting groove matches the outer contour of the press-fit component.

[0023] According to a first aspect of the invention, the welding fixture is provided with a communicating groove located on the side of the pressing component facing away from the pressing surface, the communicating groove communicating with the irradiation channel, and the side of the communicating groove away from the irradiation channel being open.

[0024] According to a first aspect of the invention, the welding fixture has a U-shaped pressing surface.

[0025] The welding apparatus according to a second aspect of the present invention includes the welding fixture described in any one of the preceding claims.

[0026] According to a third aspect embodiment of the present invention, welding is performed using the welding equipment described above, the welding method comprising:

[0027] In the pressing step, the pressing component presses the film material toward the product, and the pressing surface adheres to and presses the film material tightly.

[0028] In the welding step, the laser passes through the irradiation channel and irradiates the film material and the product to form a weld seam.

[0029] The welding method according to embodiments of the present invention has at least the following beneficial effects:

[0030] By applying the above-mentioned welding equipment, the present invention restricts the welding position to the irradiation channel, thereby preventing the molten material and the gas generated by the welding from overflowing to the pressure surface and areas outside the pressure surface, which is beneficial to improving the welding quality.

[0031] According to a third aspect of the welding method of the present invention, a cutting step is provided between the pressing step and the welding step, the cutting step cutting the film material to form a cutting slit, the cutting slit being located within the irradiation channel.

[0032] In addition to the beneficial effects of using welding equipment, the present invention, by setting a cutting step, also causes the molten material and the gas generated by melting to flow toward the cutting seam, reducing the material and gas flowing toward the pressing surface, and further reducing the risk of material and gas overflowing out of the pressing surface.

[0033] At the same time, the gas generated by melting will be ejected from the cutting seam, allowing the film to adhere to the product and preventing bubbling. The material solidified at the cutting seam will connect the film to the product, improving the welding strength.

[0034] Meanwhile, a cutting step is set between the pressing step and the welding step. The pressing surface can also prevent material overflow caused by cutting, making it easier to cut the film material and simplifying the process.

[0035] According to a third aspect of the present invention, in the welding step, the weld seam is arranged around the cutting seam.

[0036] According to a third aspect of the welding method of the present invention, the cutting of the film material includes laser irradiation and cutting the film material;

[0037] And / or, the cut is in the shape of a straight line.

[0038] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the welding fixture according to an embodiment of the present invention;

[0041] Figure 2 for Figure 1 A schematic diagram of the press-fitting components of the welding fixture;

[0042] Figure 3 for Figure 1 Schematic diagram of the welding fixture in use;

[0043] Figure 4 For use Figure 1 A flowchart illustrating the welding process for welding fixtures;

[0044] Figure 5 For use Figure 4 A schematic diagram illustrating the welding effect of the welding method.

[0045] Reference numerals: membrane material 100; product 110; pressing component 120; pressing surface 130; irradiation channel 140; pressing seat 150; mounting groove 160; through-hole 170; mounting hole 180; connecting groove 190; cutting seam 200; welding seam 210; power component 220; base 230. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0048] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, this is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] The welding fixture, welding equipment, and welding method according to embodiments of the present invention are described below with reference to the accompanying drawings.

[0051] Reference Figure 1 and Figure 2 The present invention aims to provide an embodiment of a welding fixture.

[0052] In this embodiment, the welding fixture includes Figure 1 The pressing mechanism shown and Figure 3 The base 230 shown is used for the product 110 to be welded and the film 100. The film 100 is located on the side of the product 110 to be welded away from the base 230. The pressing mechanism is used to press the film 100 against the product 110 to be welded, so that the film 100 is in close contact with the product 110 to be welded. Therefore, when welding is performed, the molten material can firmly connect the film 100 and the product 110 to be welded.

[0053] Reference Figure 1 For the pressing mechanism, the pressing mechanism includes a lifting pressing seat 150 and a power component 220 that drives the pressing seat 150 to lift. The power component 220 can be a cylinder, etc. Cylinders operate quickly and have low manufacturing costs and are easy to implement.

[0054] Reference Figure 1 and Figure 2 At the bottom of the pressing base 150, a pressing component 120 is provided. The pressing component 120 has a pressing surface 130, which is used to adhere and press the film material 100 on the side facing away from the product 110. The pressing surface 130 is provided with an irradiation channel 140, which penetrates the pressing component 120. After the laser passes through the irradiation channel 140, it irradiates the film material 100.

[0055] In summary, by providing a pressing component 120, the present invention provides a pressing surface 130. Therefore, when welding of the film material 100, such as a mylar film, is required, the pressing surface 130 compresses the film material 100, which helps to reduce the possibility of molten material and the gas generated by melting overflowing to the periphery of the pressing surface 130, thereby improving the welding quality.

[0056] By setting up an irradiation channel 140, the laser irradiates the film material 100 after passing through the irradiation channel 140. Therefore, the area of ​​laser welding is limited to the inside or inner side of the pressing surface 130. This does not affect the welding, and the pressing surface 130 can be used to squeeze the film material 100 to prevent the molten material and the gas generated by melting from overflowing out of the pressing surface 130, thereby improving the welding quality.

[0057] This invention uses laser welding to avoid direct heating of the press-fit part 120, avoids the problem of wire pulling in the film material 100, and overcomes the defects caused by hot melt welding.

[0058] This invention uses laser welding to directly heat the area to be welded, reducing the time spent on heat conduction and improving welding efficiency. Consequently, it can simultaneously improve both welding quality and welding efficiency.

[0059] It is understood that this embodiment provides a welding fixture that presses down from top to bottom. However, the welding fixture of this embodiment is intended to squeeze the film material 100 and the product 110 together to meet the welding requirements. Therefore, the welding fixture of the present invention can also be a horizontal clamping fixture or a bottom-up clamping fixture, depending on the actual welding requirements.

[0060] In this embodiment, the pressing base 150 is plate-shaped, and the bottom area of ​​the pressing base 150 is relatively large, so that more pressing parts 120 can be arranged as needed, and more positions can be welded during one lifting and lowering process of the pressing mechanism, thereby improving welding efficiency.

[0061] In this embodiment, the power component 220 and the pressing component 120 are located on both sides of the width direction of the plate-shaped pressing seat 150, which can reduce the distance between the power component 220 and the pressing component 120, reduce the torque, and make the pressing surface 130 evenly and tightly adhere to and press the film material 100, avoiding gaps between the film material 100 and the product 110, which would cause the molten material and the gas generated by melting to overflow.

[0062] Along the length of the press base 150, more press components 120 can be provided to offer multiple welding positions and improve welding efficiency.

[0063] In some specific embodiments of the present invention, the press-fitting component 120 may be detachably disposed at the bottom of the press-fitting base 150.

[0064] It is easy to understand that by making the pressing component 120 detachably disposed at the bottom of the pressing base 150, maintenance can be performed by replacing the pressing component 120, and the size and coverage area of ​​the pressing surface 130 can be changed by replacing different pressing components 120 to meet different welding needs. At the same time, there is no need to disassemble the pressing base 150 and the power component 220, reducing the workload of debugging and maintenance.

[0065] Meanwhile, the material of the pressing component 120 can be different from that of the pressing base 150 to meet the special requirements of the contact film material 100 and avoid affecting the quality of the product 110.

[0066] In some specific embodiments of the present invention, the press base 150 may be provided with a mounting groove 160, which is open downwards. The mounting groove 160 is used to install the press component 120. The bottom of the mounting groove 160 is provided with a through-hole 170 that connects to the irradiation channel 140. The laser irradiates the film material 100 after passing through the through-hole 170 and the irradiation channel 140.

[0067] It is easy to understand that by setting the mounting groove 160, the press-fitting part 120 can be accurately installed, ensuring that the position of the press-fitting surface 130 meets the design requirements.

[0068] In some specific embodiments of the present invention, the inner surface of the mounting groove 160 can be matched with the outer contour of the pressing component 120 to simplify the positioning of the pressing component 120. At the same time, it reduces the occupation of the internal solid of the pressing component 120, especially avoiding damage to the integrity of the pressing surface 130 and avoiding affecting the quality of the pressing surface 130 in bonding with and pressing the film material 100.

[0069] In some specific embodiments of the present invention, the mounting groove 160 can be a rectangular groove. Therefore, the side wall of the mounting groove 160 can be used to position the press-fitting member 120, thereby improving the directional and positional accuracy of the installation.

[0070] In some specific embodiments of the present invention, the mounting groove 160 can be a rectangular groove, which also makes it easier to determine the direction of the press-fit part 120 and avoid incorrect installation.

[0071] In some specific embodiments of the present invention, the edges of the press-fit part 120 can be rounded to avoid the need for the mounting groove 160 to be right-angled at the corner, thus reducing the processing difficulty. At the same time, the smooth transition of the outer contour of the press-fit part 120 is beneficial to the protection of the operator.

[0072] In some specific embodiments of the present invention, the mounting groove 160 may be provided with process holes at the corners to avoid direct connection between the two vertical sidewalls of the mounting groove 160. The process holes reserve space to accommodate the corners of the press-fitting component 120, reducing modifications to the press-fitting component 120 and increasing the press-fitting surface 130.

[0073] In some specific embodiments of the present invention, the mounting groove 160 can be a circular groove or a polygonal groove to meet different usage needs.

[0074] In some specific embodiments of the present invention, the pressing surface 130 of the pressing component 120 can be made higher than the mounting groove 160, that is, the pressing component 120 protrudes downward relative to the pressing seat 150, so that the pressing surface 130 contacts the film material 100 first, reducing the pressure on other positions of the film material 100 and facilitating continuous production.

[0075] In some specific embodiments of the present invention, the height of the protrusion can be about 2 mm, and the height of the protrusion can be controlled within a reasonable range to ensure the welding quality.

[0076] In some specific embodiments of the present invention, one side of the mounting slot 160 may be left open.

[0077] It is easy to understand that the open design on one side of the mounting groove 160 allows the press-fit component 120 to be disassembled and assembled from the open position, reducing the difficulty of installation. At the same time, it makes the specifications of the press-fit component 120 unrestricted in the open direction along one side of the mounting groove 160, and different press-fit components 120 can be replaced during use to meet different welding requirements.

[0078] In some specific embodiments of the present invention, the bottom of the mounting groove 160 may be provided with mounting holes 180 for mounting the press-fit component 120. Therefore, the press-fit component 120 can be installed by screws passing through the press-fit component 120 and connecting to the mounting holes 180, that is, the installation is completed by installing screws from bottom to top.

[0079] In some specific embodiments of the present invention, installation can be completed by connecting the press-fit component 120 after the screw passes through the mounting hole 180. That is, the screw is installed from top to bottom to complete the installation, which facilitates the replacement of the press-fit component 120 and reduces the difficulty of disassembly and assembly.

[0080] Meanwhile, by rationally designing the thickness of the pressing component 120 and the depth of the screw insertion into the pressing component 120, the integrity of the pressing surface 130 can be avoided, and the quality of the extruded film 100 on the pressing surface 130 can be avoided.

[0081] In some specific embodiments of the present invention, the press-fitting member 120 may be provided with a communication groove 190. The communication groove 190 is located on the side of the press-fitting member 120 facing away from the press-fitting surface 130. The communication groove 190 communicates with the irradiation channel 140, and the side of the communication groove 190 away from the irradiation channel 140 is open.

[0082] It is easy to understand that in this embodiment, on the one hand, through the communication groove 190, the weight of the press-fitting member 120 can be reduced, and the manufacturing cost can be lowered. On the other hand, the side of the communication groove 190 away from the irradiation channel 140 is open, which is also convenient for observing or detecting the welding quality from an oblique direction, does not affect the laser welding work, and is also convenient for arranging dust suction and other mechanisms, which is beneficial to improving the reliability and environmental protection of the welding process.

[0083] At the same time, the irradiation channel 140 can be the hole position at the bottom of the communication groove 190, that is, the irradiation channel 140 is smaller than the communication groove 190. Furthermore, different sizes of irradiation channels 140 can be set according to actual needs, and the reprocessing amount can be reduced. For example, the irradiation channel 140 can be directly enlarged without machining the entity of the communication groove 190, reducing the modification difficulty.

[0084] In some specific embodiments of the present invention, the press-fitting surface 130 can be in a shape of a double-square frame. Therefore, the outer contour of the press-fitting member 120 is also rectangular, and the contour of the irradiation channel 140 is also rectangular, so that the intersection of the press-fitting surface 130 and the irradiation channel 140 encloses a relatively large welding area, which can meet different welding requirements.

[0085] In the present invention, the press-fitting surface 130 is a complete ring, but on the premise of meeting the welding requirements, the press-fitting surface 130 can also have local defects or gaps. [[ID=!13]]

[0086] The present invention also aims to provide an embodiment of a welding device. The welding device of this embodiment includes a laser generating mechanism and the above-mentioned welding fixture.

[0087] Refer to Figure 3 , for the working principle of the welding device, it can be the following process:

[0088] The product to be welded 110 and the film material 100 are stacked on the base 230. The product to be welded 110 and the film material 100 can be in a block form or in a form of a strip. The strip form can reduce the workload of loading and unloading and improve the welding efficiency.

[0089] Then, the power member 220 drives the press-fitting seat 150 to descend, the press-fitting seat 150 drives the press-fitting member 120 to descend, and the press-fitting surface 130 of the press-fitting member 120 fits and presses the film material 100 and extrudes the film material 100, so that the film material 100 is closely attached to the product to be welded 110.

[0090] Then, the laser generating mechanism generates a laser, which irradiates the film material 100 from the irradiation channel 140, so that the welding position is located inside the pressing area of ​​the pressing surface 130.

[0091] In this embodiment, the film material 100 has two layers, including a light-transmitting layer and an absorption layer. The absorption layer contacts the product 110. After the laser passes through the light-transmitting layer, it irradiates the junction between the absorption layer and the product 110, causing the absorption layer and the product 110 to melt at the junction.

[0092] exist Figure 4 In the diagram, the dashed line indicates the laser, making it easier to understand the laser welding process.

[0093] After laser welding is completed, the power component 220 drives the pressing seat 150 to rise, so that the pressing surface 130 is separated from the film material 100, and the welded product 110 can be moved to facilitate the next welding.

[0094] To prevent molten material and gases generated during welding from overflowing out of the pressure fitting surface 130, refer to... Figure 4 This embodiment also provides a welding method that overcomes the above defects and improves welding quality.

[0095] Specifically, the welding method includes a pressing step S100, a cutting step S200, and a welding step S300, which are performed sequentially.

[0096] In detail, in the pressing step S100, the welding fixture of the welding equipment is used to press the film material 100 against the product 110 by the pressing component 120, and the pressing surface 130 adheres to and presses the film material 100.

[0097] In detail, in the cutting step S200, the film material 100 is cut to form a cutting slit 200, which is located within the irradiation channel 140. That is, the portion of the film material 100 located within the irradiation channel 140 is cut.

[0098] In some specific embodiments of the present invention, the length and contour of the cutting slit 200 should be reasonably set to avoid the cutting slit 200 extending to the pressing surface 130, to avoid the overflowing material adhering to the pressing part 120, and to avoid affecting the welding quality.

[0099] In some specific embodiments of the present invention, a laser beam with higher energy and faster movement speed can be used to process the cutting seam 200 without physical contact, and also reduce the need for modification of welding equipment.

[0100] Reference Figure 5In some specific embodiments of the present invention, the cutting slit 200 can be in the shape of a straight line. Preferably, the cutting slit 200 is located in the middle of the irradiation channel 140 and extends along the length of the cross-section of the irradiation channel 140. This can make the distance difference between each welding position and the cutting slit 200 smaller, so that the molten material and the gas generated by melting overflow evenly, and avoid overflowing towards the pressing surface 130 due to obstruction.

[0101] In some specific embodiments of the present invention, the cutting seam 200 can be other shapes, such as curves or frame lines, to meet practical needs.

[0102] For welding step S300, the laser generating mechanism generates a laser that meets the welding requirements. After passing through the irradiation channel 140, the laser irradiates the film material 100 and the product 110, forming a weld seam 210 and completing the welding.

[0103] The weld seam 210 surrounds the cutting seam 200, and the shape of the weld seam 210 surrounding the cutting seam 200 can be referred to... Figure 5 .

[0104] In some specific embodiments of the present invention, the weld seam 210 and the cutting seam 200 can be arranged side by side or perpendicularly to meet the actual welding requirements.

[0105] In summary, in addition to the beneficial effects of using welding equipment, the present invention, by setting the cutting step S200, also causes the molten material and the gas generated by melting to flow toward the cutting seam 200, reducing the material and gas flowing toward the pressing surface 130, and further reducing the risk of material and gas overflowing toward the pressing surface 130.

[0106] At the same time, the gas generated by melting will be ejected from the cutting seam 200, so that the film material 100 adheres to the product 110 and avoids bubbling. The material solidified at the cutting seam 200 will connect the film material 100 and the product 110, improving the welding strength.

[0107] Meanwhile, a cutting step S200 is set between the pressing step S100 and the welding step S300. The pressing surface 130 can also prevent material overflow caused by cutting, making it easier to cut the film material and simplifying the process.

[0108] In some specific embodiments of the present invention, both layers of the film material 100 can be cut open to facilitate the outflow of molten material and gas generated during melting.

[0109] In some specific embodiments of the present invention, the cutting seam 200 can be pre-processed on the film material, and then the pressing step S100 and welding step S300 can be performed to shorten the welding cycle. That is, when performing the pressing step S100 and welding step S300, the film material can be cut simultaneously in the previous process to improve production efficiency.

[0110] In the description of this specification, the references to terms such as "an embodiment, some embodiments, illustrative embodiments, example, specific example, or examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0111] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0112] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0113] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0114] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0115] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A welding method, characterized by, The welding method comprises: a pressing step, the pressing member (120) presses the film material (100) to the product (110), and the pressing surface (130) is attached to and presses the film material (100); a welding step, the laser irradiates the film material (100) and the product (110) through the irradiation channel (140), and a welding seam (210) is formed; a cutting step is arranged between the pressing step and the welding step, the cutting step cuts the film material (100), the film material (100) forms a cutting seam (200), and the cutting seam (200) is located in the irradiation channel (140); in the welding step, the welding seam (210) is arranged around the cutting seam (200). The cutting of the film material (100) comprises laser irradiation and cutting of the film material (100); 2. The welding method according to claim 1, characterized in that, and / or, the cutting seam (200) is a straight line shape. ​

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