Preparation equipment and preparation method of secondary battery

Abstract

The embodiment of the invention relates to the technical field of new energy, and discloses preparation equipment and a preparation method of a secondary battery. According to the hot melting device, the pressing plate of the hot melting device can cover the tab of the battery cell, so that the tab can be pressed by the pressing plate. And meanwhile, the detection device detects a gap between the insulating film and the battery top cover in real time and sends a detection result to the control device. If the detection result still does not conform to the expectation, the control device can control the turnover device to place the insulating film again until the detection result reaches the standard, and then welding is carried out. Therefore, when the specification of the battery cell is changed or the alignment precision of the insulating film is influenced by the lug bulge, the preparation equipment of the secondary battery can automatically control the alignment precision of the insulating film, so that the yield and the consistency of products are improved. The preparation method of the secondary battery is applied to the preparation equipment of the secondary battery.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of new energy technology, and in particular to a preparation device and a preparation method of a secondary battery. Background Art

[0002] The battery production process includes the process of hot-melting the battery cells to put them into the insulating film, which can protect the internal circuit of the battery and provide a certain degree of insulation performance. In the existing battery cell insulating film packaging equipment, taking the insulating film packaging of the large surface of the battery cell as an example, the clamping jaws are usually moved to the hot-melt station by a cylinder, and then the battery cell and the insulating film are pressed by a pressing device before welding. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a secondary battery manufacturing device and a manufacturing method, which can meet the requirements of insulating films of battery cells with different thicknesses and solve the problem of poor insulating film alignment caused by protruding battery cell tabs.

[0004] In order to solve the above technical problems, the first aspect of the present invention provides a secondary battery preparation device, comprising: A bracket; a hot melt device, comprising a hot press table fixed on the bracket, and a pressing mechanism and a hot melt mechanism arranged opposite to the hot press table, the pressing mechanism comprising a pressing plate, the hot melt mechanism comprising a hot melt head arranged at a distance from the pressing plate, the orthographic projection of the part of the pressing plate close to the hot melt head on the hot press table can cover the orthographic projection of the part of the insulating film close to the hot melt head on the hot press table, and the side wall of the pressing plate close to the hot melt head is provided with an avoidance groove for the hot melt head to pass through; the hot press table is used to carry the battery cell, the pressing plate is used to press and fix the insulating film on the surface of the battery cell, and the hot melt head is used to weld the insulating film and the battery top cover; flip A turning device is arranged opposite to the hot melt device and movably arranged on the bracket, the flipping device is used to clamp the insulating film and flip the insulating film to the hot pressing table so that the insulating film covers the surface of the battery cell; a detection device is arranged opposite to the flipping device and adjacent to the hot melt device, the detection device is used to detect the gap between the insulating film on the battery cell and the battery top cover in real time after the flipping device flips the insulating film; a control device is electrically connected to the hot melt device, the flipping device and the detection device, the control device is used to send operation commands to the hot melt device, the flipping device and the detection device, and receive detection information sent by the detection device.

[0005] The equipment for preparing secondary batteries of the embodiment of the present invention uses a flipping device to flip the insulating film onto the battery cell on the hot press table. The pressing plate of the hot melt device can cover the pole ear of the battery cell. If the pole ear has a protrusion and supports the insulating film, the pressing plate can press the pole ear to ensure that the gap between the insulating film and the battery top cover meets the preset requirements. At the same time, the detection device detects the gap between the insulating film and the battery top cover in real time and sends the detection result to the control device. If the detection result still does not meet the expectations, the control device can control the flipping device to re-place the insulating film until the detection result meets the standard; if the detection result meets the requirements, the control device controls the hot melt mechanism to perform welding, and the detection device can also complete the welding of the product for quality inspection. In this way, when the specifications of the battery cell change or the alignment accuracy of the insulating film is affected by the protrusion of the pole ear, the equipment for preparing secondary batteries can automatically control the alignment accuracy of the insulating film, thereby improving the yield and consistency of the product, and improving the level of automated production and reducing labor costs.

[0006] Optionally, the hot melt mechanism also includes a first support member, a hot melt driving member and a hot melt head fixing member, the first support member is fixed to the bracket, there are multiple hot melt heads, and the multiple hot melt heads are fixed to the hot melt head fixing member at intervals, the hot melt driving member is fixed to the first support member or the hot melt head fixing member, and the hot melt driving member is used to drive the hot melt head fixing member to drive the multiple hot melt heads to move in a vertical direction; there are multiple avoidance grooves, and the avoidance grooves and hot melt heads are arranged one by one.

[0007] Optionally, the clamping mechanism includes a first mounting member and a clamping driving member, the first mounting member and the hot melt head fixing member are fixed on the same side of the first supporting member, the clamping plate is movably connected to the first mounting member and is located on the side of the hot melt head fixing member facing the hot pressing platform, the clamping driving member is fixed to the first mounting member, and the clamping driving member is used to drive the clamping plate to clamp the insulating film or release the insulating film.

[0008] Optionally, the detection device is arranged adjacent to the first support member, and is used to detect whether the distance between the edge of the insulating film close to the battery top cover and the battery top cover after flipping is within a preset range. If it is within the preset range, the detection device sends first detection information to the control device, and the control device controls the clamping mechanism to press the insulating film, and controls the hot melt mechanism to weld the insulating film and the battery top cover; if it exceeds the preset range, the detection device sends second detection information to the control device, and the control device controls the flipping device to clamp the insulating film again and adjust the position of the insulating film, and the detection device performs detection again.

[0009] Optionally, the flipping device includes a second support member, a cantilever driving member, two cantilevers and two clamping mechanisms, the second support member is movably arranged on the bracket, the cantilever driving member is fixed to the second support member, the two cantilevers are arranged in parallel and are movably arranged on the second support member, the two clamping mechanisms are arranged opposite to each other and fixed to the two cantilevers one by one; the cantilever driving member is transmission-connected to the two cantilevers to drive the two cantilevers to drive the two clamping mechanisms to move closer to or away from each other.

[0010] Optionally, the clamping mechanism includes a power assembly and a clamping claw connected to the power assembly by transmission, the power assembly is fixed to the cantilever, and the power assembly is used to drive the clamping claw to clamp the insulating film or release the insulating film, and drive the clamping claw to flip the insulating film.

[0011] Optionally, the power assembly includes a rotating motor and a jaw driving member, the rotating motor is fixed to the cantilever, the jaw driving member is transmission-connected to the rotating shaft of the rotating motor, and the jaw is transmission-connected to the jaw driving member; the rotating motor is used to drive the jaw driving member to rotate, and the jaw driving member is used to drive the jaw to open and close and / or rotate.

[0012] Optionally, the clamping claw comprises two clamping arms arranged opposite to each other, the two clamping arms having clamping ends for clamping the insulating film, the two clamping ends being provided with flexible clamping portions, and the two clamping arms clamp the insulating film via the flexible clamping portions.

[0013] Optionally, it also includes a transmission device fixed on the bracket, the transmission device includes a first driving mechanism arranged on the bracket and a second driving mechanism fixedly connected to the first driving mechanism, the second driving mechanism is fixedly connected to the flipping device; the first driving mechanism is used to drive the second driving mechanism to drive the flipping device to move along a first direction, and the second driving mechanism is used to drive the flipping device to move along a second direction, and the first direction is perpendicular to the second direction.

[0014] A second aspect of the present invention provides a method for preparing a secondary battery, comprising: Turning over the insulating film so that the insulating film covers the surface of the battery cell; Obtaining an actual distance between an edge of the insulating film close to the battery top cover and the battery top cover, and determining whether the actual distance is within a preset range; If the actual distance is outside the preset range, reposition the insulating film and obtain the actual distance between the insulating film and the battery top cover again until the actual distance is within the preset range; If the actual distance is within a preset range, the insulating film is pressed tightly, and the insulating film and the battery top cover are welded; Perform appearance inspection on the welding position to determine whether the appearance of the welding position meets the preset requirements; If it does not meet the preset requirements, remove the insulating film and re-weld it until it meets the preset requirements; If it meets the preset requirements, the processing is completed and cutting can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of a secondary battery preparation device according to an embodiment of the present invention; Figure 2 is a schematic diagram of the three-dimensional structure of a hot melt device according to an embodiment of the present invention; Figure 3 yes Figure 2 A schematic side view of the hot melt device shown; Figure 4 yes Figure 2 A magnified schematic diagram of the middle A1 region; Figure 5 is a schematic diagram of the three-dimensional structure of a flipping device according to an embodiment of the present invention; Figure 6 is a schematic diagram of the three-dimensional structure of a transmission device according to an embodiment of the present invention; Figure 7 It is a schematic diagram of a process for preparing a secondary battery according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0018] In the embodiments of the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0019] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the terms "installed", "set", "provided with", "opened", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0022] At present, in the process of coating the battery cell, in order to ensure or improve the positioning accuracy of the insulating film, the battery cell is generally fixed by designing a specific positioning fixture to ensure the fixed position of the battery cell. However, due to different actual product requirements, the sizes of the battery cells that need to be coated with insulating films are different, so it is necessary to design corresponding fixtures according to the changed battery cells. In other words, the versatility of the fixture is low, which will increase the design cost and manufacturing cost of the fixture, thereby increasing the manufacturing cost of the battery cell. When the product specifications (such as the thickness and width of the battery) of the previous and subsequent batches are quite different, the actual distance between the insulating film and the battery cell top cover after it is in place will not meet the requirements, resulting in poor welding effect. In addition, due to processing errors and other reasons, the tabs of some batteries may protrude to a certain extent. The protruding tabs will support the insulating film, resulting in too large a distance between the insulating film battery top cover, which will also affect the welding effect and cause problems with low product yield and consistency. In addition, in the existing process, when performing the hot melt process, it is usually manually judged whether the welding process meets the regulations. If the welding process and results do not meet the regulations, they are also manually controlled, and the automation level is low.

[0023] To solve the above technical problems, an embodiment of the present invention provides a secondary battery preparation device, comprising: a bracket; a hot melt device, comprising a hot press table fixed on the bracket, and a pressing mechanism and a hot melt mechanism arranged opposite to the hot press table, the pressing mechanism comprising a pressing plate, the hot melt mechanism comprising a hot melt head arranged spaced apart from the pressing plate, the orthographic projection of the part of the pressing plate close to the hot melt head on the hot press table can cover the orthographic projection of the part of the insulating film close to the hot melt head on the hot press table, and the side wall of the pressing plate close to the hot melt head is provided with an avoidance groove for the hot melt head to pass through; the hot press table is used to carry the battery cell, the pressing plate is used to press and fix the insulating film on the surface of the battery cell, and the A hot melt head is used for welding the insulating film and the battery top cover; a flipping device is arranged opposite to the hot melt device and movably arranged on the bracket, the flipping device is used for clamping the insulating film and flipping the insulating film to the hot pressing table so that the insulating film covers the surface of the battery cell; a detection device is arranged opposite to the flipping device and adjacent to the hot melt device, the detection device is used for real-time detection of the gap between the insulating film on the hot pressing table and the battery top cover after the flipping device flips the insulating film; a control device is electrically connected to the hot melt device, the flipping device and the detection device, the control device is used for sending operation commands to the hot melt device, the flipping device and the detection device, and receiving detection information sent by the detection device.

[0024] An embodiment of the present invention further provides a method for preparing a secondary battery, comprising: Turning over the insulating film so that the insulating film covers the surface of the battery cell; Obtaining an actual distance between an edge of the insulating film close to the battery top cover and the battery top cover, and determining whether the actual distance is within a preset range; If the actual distance is outside the preset range, reposition the insulating film and obtain the actual distance between the insulating film and the battery top cover again until the actual distance is within the preset range; If the actual distance is within a preset range, the insulating film is pressed tightly, and the insulating film and the battery top cover are welded; Perform appearance inspection on the welding position to determine whether the appearance of the welding position meets the preset requirements; If it does not meet the preset requirements, remove the insulating film and re-weld it until it meets the preset requirements; If it meets the preset requirements, the processing is completed and cutting can be carried out.

[0025] The following is a detailed description of the implementation details of the submerged liquid-cooled energy storage system of the first embodiment of the present invention. The following content is only the implementation details provided for easy understanding and is not necessary for the implementation of this solution.

[0026] See also Figures 1 to 7The secondary battery manufacturing equipment 1000 of this embodiment includes: a bracket 100, a hot melt device 200 fixed on the bracket 100, a flipping device 300 fixed on the bracket 100 and arranged opposite to the hot melt device 200, a detection device 400 arranged opposite to the flipping device 300 and adjacent to the hot melt device 200, and a control device (not shown) electrically connecting the hot melt device 200, the flipping device 300 and the detection device 400.

[0027] The hot melt device 200 includes a hot press table 210 fixed on the bracket 100, and a pressing mechanism 220 and a hot melt mechanism 230 arranged opposite to the hot press table 210, and the hot press table 210 is used to carry the battery cell 500. Among them, the pressing mechanism 220 includes a pressing plate 221 for pressing and fixing the insulating film 600 on the battery cell 500, and the hot melt mechanism 230 includes a hot melt head 231 spaced apart from the pressing plate 221, and the orthographic projection of the part of the pressing plate 221 close to the hot melt head 231 on the hot press table 210 can cover the orthographic projection of the part of the insulating film 600 close to the hot melt head 231 on the hot press table 210. In other words, the edge of the pressing plate 221 close to the hot melt head 231 can cover the edge of the insulating film 600 close to the battery top cover 700, so as to ensure that the pressing plate 221 can press the tabs (not shown) of the battery cell 500 when pressing the battery cell 500. If the tabs are protruding, the pressing plate 221 can flatten the tabs to ensure that the insulating film 600 evenly covers the surface of the battery cell 500. The pressing plate 221 is provided with an avoidance groove 221a on one side close to the hot melt head 231, and the hot melt head 231 can pass through the avoidance groove 221a to contact the insulating film 600, thereby heating the insulating film 600 to melt and connect the insulating film 600 to the battery top cover 700.

[0028] The flipping device 300 is movably disposed on the support 100 . The flipping device 300 can clamp the insulating film 600 and flip the insulating film 600 onto the hot pressing stage 210 so that the insulating film 600 covers the surface of the battery cell 500 .

[0029] After the flipping device 300 flips the insulating film 600 onto the surface of the battery cell 500, the detection device 400 starts to detect the gap between the insulating film 600 on the battery cell 500 and the battery top cover 700 in real time, for example, detecting whether the size of the gap meets a preset range.

[0030] The control device can send operation instructions to the hot melt device 200, the flip device 300 and the detection device 400, so that each device performs hot melting according to a preset process. In addition, the control device can also receive detection information sent by the detection device 400 to send corresponding control instructions to the hot melt device 200, the flip device 300 and the detection device 400 according to the detection information.

[0031] It is understandable that the detection information may be the specific size of the gap, and the control device evaluates whether the size of the gap meets the requirements and then performs control. Alternatively, the detection device 400 may realize the functions of detection and evaluation, and the evaluation result is directly sent to the control device as the detection information, and the control device then performs control according to the evaluation result.

[0032] In this way, if there is a protrusion on the pole ear and the insulating film 600 is supported, the pressing plate 221 can press the pole ear to ensure that the gap between the insulating film 600 and the battery top cover 700 meets the preset requirements. At the same time, the detection device 400 detects the gap between the insulating film 600 and the battery top cover 700 in real time and sends the detection result to the control device. If the detection result still does not meet the expectations, the control device can control the flip device 300 to reposition the insulating film 600 until the detection result meets the standard; if the detection result meets the requirements, the control device controls the hot melt mechanism 230 to perform welding, and the detection device 400 can also complete the quality inspection of the welded product. In this way, when the specifications of the battery cell 500 change or the alignment accuracy of the insulating film 600 is affected by the protrusion of the pole ear, the secondary battery preparation equipment 1000 can automatically control the alignment accuracy of the insulating film 600, thereby improving the yield and consistency of the product, and improving the level of automated production and reducing labor costs.

[0033] It can be understood that the control device in this embodiment can be a PLC host computer, a computer device, or other device that can achieve the expected control function, and the present invention does not make any specific limitation on this.

[0034] During the production process, the preset range of the gap between the insulating film 600 and the battery top cover 700 can be set to 0.5mm-2.5mm. That is to say, after the flipping device 300 flips the insulating film 600 onto the surface of the battery cell 500, if the detection device 400 detects that the size of the gap between the insulating film 600 and the battery top cover 700 falls within the above range, the control device controls the clamping mechanism 220 to drive the clamping plate 221 to clamp and fix the battery cell 500 and the insulating film 600, and controls the hot melt mechanism 230 to drive the hot melt head 231 to move to the insulating film 600, so as to connect the insulating film 600 and the battery top cover 700 together by hot melting. If the detection device 400 detects that the size of the gap between the insulating film 600 and the battery top cover 700 falls outside the above range, but the difference is small, the control device can control the clamping mechanism 220 to drive the clamping plate 221 to clamp and fix the battery cell 500 and the insulating film 600 to eliminate the effect of the gap expansion caused by the protrusion of the pole ear (affected by factors such as manufacturing tolerances, the protrusion degree is 1mm-2mm).

[0035] In some embodiments, the hot melt device 200 also includes a film placement table 240 fixed on the bracket 100 and spaced apart from the hot pressing table 210. The film placement table 240 is used to support the stacked insulating films 600. The flipping device 300 picks up the insulating film 600 on the film placement table 240, and then flips the picked insulating film 600 to cover the battery cell 500 on the hot pressing table 210.

[0036] Since the insulating film 600 itself is light in weight, the film placement platform 240 can be designed as a groove, and the insulating film 600 is stacked in the groove to prevent the insulating film 600 from shifting or even falling off the film placement platform 240. The side wall of the groove can be provided with a notch to facilitate the flipping device 300 to pick up the insulating film 600 from the groove.

[0037] In this embodiment, the hot melt mechanism 230 further includes a first support member 232, a hot melt driving member 233 and a hot melt head fixing member 234. The first support member 232 is fixed on the bracket 100 and is used to carry the hot melt driving member 233 and the hot melt head fixing member 234. There are multiple hot melt heads 231, and the multiple hot melt heads 231 are fixed on the hot melt head fixing member 234 at intervals. The hot melt driving member 233 can be arranged on the first support member 232 or the hot melt head fixing member 234 to drive the hot melt head fixing member 234 to drive the multiple hot melt heads 231 to move in the vertical direction. More specifically, the multiple hot melt heads 231 can be driven to contact the insulating film 600 on the battery cell 500 to achieve hot melt connection. After the hot melt connection is completed, the multiple hot melt heads 231 can be driven away from the battery cell 500 to facilitate the continued processing of other battery cells 500. It is understandable that when the number of hot melt heads 231 is multiple and spaced apart from each other, the number of avoidance grooves 221a on the pressing plate 221 is also multiple and spaced apart from each other, and the multiple hot melt heads 231 and the multiple avoidance grooves 221a are arranged in one-to-one correspondence.

[0038] It should be noted that a heating module (not shown) electrically connected to the control device is disposed on the hot melt head fixing member 234 , and the heating module can heat or stop heating the hot melt head 231 under the control of the control device.

[0039] Optionally, the first support member 232 can be a first vertical slide rail, the hot melt head fixing member 234 can be movably fixed on the first support member 232, and the hot melt driving member 233 can be a motor, an electric cylinder or a pneumatic cylinder electrically connected to the control device, whose output end is fixed to the first support member 232 or one of the melt head fixing member 234, and whose fixed end is fixed to the first support member 232 or the other of the melt head fixing member 234. When the hot melt driving member 233 is working, it can drive the hot melt head fixing member 234 to move along the first support member 232.

[0040] In this embodiment, the clamping mechanism 220 also includes a first mounting member (not shown) and a clamping driving member (not shown). The first mounting member is fixed to the first support member 232 and is located on the same side of the first support member 232 as the hot melt head fixing member 234. The clamping plate 221 is movably connected to the first mounting member and is located on the side of the hot melt head fixing member 234 facing the hot pressing platform 210. The clamping driving member is fixed to the first mounting member and is used to drive the clamping plate 221 to clamp the insulating film 600 or release the insulating film 600.

[0041] Optionally, the clamping drive member can be a motor, an electric cylinder or a pneumatic cylinder, whose fixed end is fixed to the first mounting member, and the output end is fixedly connected or transmission-connected to the clamping plate 221. The clamping drive member drives the clamping plate 221 to move in the vertical direction to clamp the insulating film 600 or release the insulating film 600.

[0042] In some embodiments, the clamping plate 221 and the hot melt head fixing member 234 can be set to move synchronously, in which case, the clamping driver and the hot melt driver 233 can be the same. The clamping driver is connected to the clamping plate 221 via a telescopic rod 222. For example, the telescopic rod 222 includes a primary rod 222a and a secondary rod 222b. The primary rod 222a is fixedly connected to the hot melt head fixing member 234 and sleeved on the outer periphery of the secondary rod 222b. The secondary rod 222b can move up and down relative to the primary rod 222a. The secondary rod 222b is fixedly connected to the clamping plate 221 at one end close to the hot press table 210. The hot melt head fixing member 234 may be provided with a through hole, and the primary rod 222a also has a through hole, and the through hole of the hot melt head fixing member 234 is connected to the through hole of the primary rod 222a, and the output end of the pressing drive member is connected to the end of the secondary rod 222b away from the hot press table 210, so as to drive the secondary rod 222b to move relative to the primary rod 222a and drive the pressing plate 221 to move. In some other embodiments, the pressing drive member may be connected to the pressing plate 221 through a fixing rod (not shown), and in this case, the fixing rod is not retractable.

[0043] Alternatively, a spring 223 may be sleeved on the outer periphery of the secondary rod 222b, the spring 223 being located between the pressing plate 221 and the hot melt head fixing member 234, and the two ends of the spring 223 respectively abutting against the pressing plate 221 and the hot melt head fixing member 234. The pressing driving member and the hot melt driving member 233 are the same, and are only used to drive the hot melt head fixing member 234 to move, and the pressing plate 221 uses the elastic force of the spring 223 to press the insulating film 600.

[0044] It is understandable that the telescopic rod 222 or the fixed rod can be provided with two and arranged in parallel. In addition, two through holes for the telescopic rod 222 or the fixed rod to pass through can be provided on the hot melt head fixing piece 234, and the telescopic rod 222 or the fixed rod can be used as a guide rod for the hot melt head fixing piece 234 to move up and down.

[0045] In this embodiment, the detection device 400 is arranged adjacent to the hot melt device 200, specifically, adjacent to the first support member 232. After the flipping device 300 flips the insulating film 600 onto the battery cell 500, the detection device 400 begins to detect in real time whether the distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700 is within a preset range. When the detection result shows that the aforementioned distance is within the preset range, the control device can control the pressing mechanism 220 to press the insulating film 600 and the battery cell 500 according to the detection result of the detection device 400 (information indicating compliance with the requirements), and control the hot melt mechanism 230 to perform hot melt connection on the insulating film 600 and the battery top cover 700. When the test result shows that the aforementioned distance exceeds the preset range, the control device can be configured to control the flipping device 300 to re-clamp, flip and place the insulating film 600 according to the test result (information indicating non-compliance with the requirements) until the test result meets the requirements; or, when the test result shows that the aforementioned distance exceeds the preset range, the control device can be configured to control the clamping mechanism 220 to clamp the insulating film 600 and the battery cell 500 according to the test result to eliminate the influence caused by the protrusion of the pole ear, and then detect whether the aforementioned distance meets the requirements. If so, hot melt connection is performed. If not, the flipping device 300 is controlled to re-place the insulating film 600 and test it until the processing requirements are met.

[0046] In this embodiment, the detection device 400 is a camera, which can be a CCD camera or an AI camera. When the AI ​​camera is used, it can calculate the actual distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700 based on the shooting results. If the camera is a CCD camera, the control device can obtain the image captured by the CCD camera, and calculate based on the image to obtain the actual distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700.

[0047] It is understandable that the detection device 400 can also be configured to detect the appearance of the battery cell 500 after the hot melt connection is completed to determine whether the welding of the insulating film 600 meets the standards.

[0048] In this embodiment, the flipping device 300 includes a second support member 310, a cantilever driving member 320, two cantilevers 330 and two clamping mechanisms 340. The second support member 310 is movably arranged on the bracket 100, the cantilever driving member 320 is fixed to the second support member 310, the two cantilevers 330 are arranged in parallel and movably arranged on the second support member 310, and the two clamping mechanisms 340 are arranged oppositely and fixed to the two cantilevers 330 in a one-to-one correspondence. Among them, the cantilever driving member 320 is connected to the two cantilevers to drive the two cantilevers 330 to drive the two clamping mechanisms 340 to move closer to or away from each other, and the two clamping mechanisms 340 are used to clamp the insulating film 600 or release the insulating film 600.

[0049] Specifically, the second support member 310 is arranged opposite to the first support member 232, and can be driven to approach the first support member 232 or to move away from the first support member 232. The second support member 310 is used to carry the cantilever driving member 320, two cantilevers 330 and two clamping mechanisms 340. The cantilever driving member 320 is fixed on the second support member 310. The two cantilevers 330 can move closer to or farther from each other in the horizontal direction under the drive of the cantilever driving member 320. When it is necessary to clamp the insulating film 600, the cantilever driving member 320 drives the two cantilevers 330 to move away from each other, thereby moving the two clamping mechanisms 340 away from each other. After the two clamping mechanisms 340 move to the opposite sides of the insulating film 600, the cantilever driving member 320 drives the two cantilevers 330 to drive the two clamping mechanisms 340 to move closer to each other. After the two clamping mechanisms 340 clamp the insulating film 600, the two clamping mechanisms 340 can flip the insulating film 600.

[0050] The two cantilevers 330 extend from the second support member 310 toward the hot melt mechanism 230. The two cantilevers 330 are respectively provided with a clamping mechanism 340 at one end close to the hot melt mechanism 230. The two clamping mechanisms 340 are located between the two cantilevers 330 and can rotate relative to the cantilevers 330. In this way, the insulating film 600 can be turned over after being clamped.

[0051] Optionally, the cantilever drive member 320 can be set as a motor or an electric cylinder. When a motor is used, the two cantilevers 330 can be driven to move closer to or farther from each other through a gear transmission mechanism or a screw slider transmission mechanism. When a motor or an electric cylinder is used as the cantilever drive member 320, when the clamping plate 221 presses the battery cell 500 and the insulating film 600 and the hot melt head 231 performs hot melt connection, the retraction function of the motor or the electric cylinder can be used to make the clamping mechanism 340 clamp the edges of the opposite sides of the insulating film 600 respectively, and then the two cantilevers 330 are driven by the motor or the electric cylinder to drive the two clamping mechanisms 340 away from each other, so as to flatten and tighten the insulating film 600.

[0052] In this embodiment, the clamping mechanism 340 includes a power component 341 and a clamp (not shown) that is transmission-connected to the power component. The power component 341 is fixed to the cantilever 330. The power component 341 is used to drive the clamp to clamp the insulating film 600 or release the insulating film 600, and drive the clamp to flip the insulating film 600.

[0053] For example, the power assembly 341 includes a rotary motor 341a and a clamping jaw driving member 341b. The rotary motor 341a is fixed to one end of the cantilever 330 close to the first support member 232, and can be located on the side of one cantilever 330 away from the other cantilever 330. The clamping jaw driving member 341b is connected to the rotating shaft of the rotary motor 341a, and can be driven by the rotary motor 341a to rotate the clamping jaw driving member 341b. The clamping jaw driving member 341b is used to drive the clamping jaw to open and close and / or rotate to flip the insulating film 600 clamped and fixed by the clamping jaw. It can be understood that the power assembly 341 can be a rotating clamping jaw. Compared with the rotating mechanism formed by discrete components, the rotating clamping jaw has a high degree of integration and a small volume, and can be directly installed and used, which can reduce the process and time of assembling the equipment.

[0054] In some embodiments, the clamping mechanism can also be formed by assembling discrete components, for example, the clamping jaw driving member 341b is a cylinder or an electric cylinder, which is fixed to the fixed plate, the output end of the rotating motor 341a is connected to the clamping jaw driving member 341b or the fixed plate, and the clamping jaw is connected to the clamping jaw driving member 341b. For example, the clamping jaw is movably arranged on the fixed plate, and the output end of the clamping jaw driving member 341b is fixedly connected to the clamping jaw, the clamping jaw driving member 341b drives the clamping jaw to clamp the insulating film 600 or release the insulating film 600, and the rotating motor 341a drives the clamping jaw to rotate by rotating the fixed plate or the clamping jaw driving member 341b.

[0055] Furthermore, the clamp includes two clamp arms arranged opposite to each other, the two clamp arms have clamp ends for clamping the insulating film 600, the two clamp ends are provided with flexible clamp parts (not shown), and the two clamp arms clamp the insulating film 600 through the flexible clamp parts. By providing the flexible clamp parts on the clamp ends of the clamp arms, the insulating film 600 can be directly clamped by the clamp arms with greater hardness, thereby preventing the insulating film 600 from wrinkling. At the same time, since the flexible clamp part has a certain deformation margin, during the clamping process, the clamp driving member 341b outputs a force that causes the flexible clamp part to deform to a certain extent, which can ensure the stability of the clamped insulating film 600 and prevent the two clamp arms from excessively squeezing each other during clamping and damaging the device.

[0056] Optionally, the clamp driving member 341b may be a motor, an electric cylinder or a pneumatic cylinder, and the flexible clamping portion may be made of flexible materials such as rubber and silicone, which is not specifically limited in the present invention.

[0057] In some other embodiments, in order to ensure that the insulating film 600 picked up each time is one sheet, a suction cup can be used to pick up the insulating film 600 instead of the clamping method. For example, the fixed end of the pneumatic slip ring (not shown) is fixed on the fixed plate, and the rotating end of the pneumatic slip ring is located on the side of the fixed end away from the fixed plate and facing the other cantilever. The rotating end of the pneumatic slip ring is provided with a suction cup (not shown), and the suction cup is connected to the internal airway of the pneumatic slip ring. A vacuum generating device (not shown) can be provided on the cantilever 330 and the fixed plate to make the internal air pressure of the suction cup less than the atmospheric pressure, or to create a vacuum inside the suction cup to absorb the insulating film 600. The rotating shaft of the rotating motor 341a is fixedly connected to the rotating end of the pneumatic slip ring to drive the rotating end of the pneumatic slip ring to rotate. In this way, each time the insulating film 600 is picked up, the suction cup can adsorb and fix a sheet of insulating film 600 above the stacked insulating films 600.

[0058] It is understandable that the rotating shaft of the rotating motor 341a driving the rotating end of the fixed plate or the pneumatic slip ring can be directly connected to the rotating end of the fixed plate or the pneumatic slip ring, or can be first connected to a reduction mechanism, and then connected to the rotating end of the fixed plate or the pneumatic slip ring by the reduction mechanism. The rotating motor 341a is preferably a servo motor, which can more accurately control the rotation angle of the rotating end of the clamp or the pneumatic slip ring.

[0059] In this embodiment, the secondary battery preparation equipment 1000 also includes a transmission device 800 fixed on the bracket 100, and the transmission device 800 is electrically connected to the control device, and is used to drive the flipping device 300 to move under the control of the control device, so that the flipping device 300 can clamp / flip the insulating film 600 at a suitable position, and can be compatible with insulating films 600 of different specifications.

[0060] Specifically, the transmission device 800 includes a first driving mechanism 810 disposed on the bracket 100 and a second driving mechanism 820 fixedly connected to the first driving mechanism 810, and the second driving mechanism 820 is fixedly connected to the flip device 300. The first driving mechanism 810 can drive the second driving mechanism 820 to move in a first direction, and the second driving mechanism 820 can drive the flip device to move in a second direction, and the first direction is perpendicular to the second direction. The two driving mechanisms can respectively realize movement in different directions, so that the flip device 300 can move to any position in the plane defined by the first direction and the second defense line.

[0061] For example, the first driving mechanism 810 is a horizontal driving mechanism, including a horizontal slide rail 811, a horizontal driving member and a first mounting plate 812. The horizontal slide rail 811 is fixed to the bracket 110, and its extension direction is the same as that of the cantilever 330. The first mounting plate 812 is movably arranged on the horizontal slide rail 811. The horizontal driving member is fixed to the bracket 110, the horizontal slide rail 811 or the first mounting plate 812. The horizontal driving member is used to drive the first mounting plate 812 to move on the horizontal slide rail 811. The second driving mechanism 820 is fixed to the first mounting plate 812. When the horizontal driving member is working, the first mounting plate 812 is driven by the horizontal driving member to move along the horizontal slide rail 811, and the first mounting plate 812 drives the second driving mechanism 820 to move synchronously, so that the flip device 300 moves in the horizontal direction.

[0062] Further, the second driving mechanism 820 is a vertical driving mechanism, including a vertical slide rail 821, a vertical driving member 822 and a second mounting plate 823. The vertical slide rail 821 is fixed on the first mounting plate 812, the second mounting plate 823 is movably arranged on the vertical slide rail 821, the vertical driving member 822 is fixed on the first mounting plate 812, the vertical slide rail 821 or the second mounting plate 823, and the vertical driving member 822 is used to drive the second mounting plate 823 to move on the vertical slide rail 821. The flip device 300 is fixed on the second mounting plate 823, specifically, the second support member 310 is fixed on the second mounting plate 823. When the vertical driving member 822 is working, the second mounting plate 823 is driven by the vertical driving member 822 to move along the vertical slide rail 821, and the second mounting plate 823 drives the second support member 310 to move synchronously.

[0063] Alternatively, the connection relationship between the horizontal drive mechanism and the vertical drive mechanism can be interchangeably arranged. In this case, the first drive mechanism is a vertical drive mechanism, the vertical slide rail 821 is fixed to the bracket 100, the second mounting plate 823 is movably arranged on the vertical slide rail 821, the vertical drive member 822 is fixed to the bracket 100, the vertical slide rail 821 or the second mounting plate 823, and the vertical drive member 822 is used to drive the second mounting plate 823 to move on the vertical slide rail 821. The second drive mechanism is a horizontal drive mechanism, which is fixed to the first mounting plate 923. When the vertical drive member 822 is working, the second mounting plate 823 is driven by the vertical drive member 822 to move along the vertical slide rail 821, and the second mounting plate 823 drives the horizontal drive mechanism to move synchronously.

[0064] Furthermore, the horizontal slide rail 811 is fixed to the second mounting plate 823, the first mounting plate 812 is movably arranged on the horizontal slide rail 811, the horizontal driving member is fixed to the first mounting plate 812, the horizontal slide rail 811 or the second mounting plate 823, and the horizontal driving member is used to drive the second mounting plate 823 to move on the horizontal slide rail 811. The second support member 310 is fixed to the first mounting plate 812. When the horizontal driving member is working, the first mounting plate 812 is driven by the horizontal driving member to move along the horizontal slide rail 811, and the first mounting plate 812 drives the second support member 310 to move synchronously, so that the flip device 300 moves in the horizontal direction.

[0065] Optionally, the horizontal drive member and the vertical drive member 822 can be motors or electric cylinders. In some embodiments, the slide rail can be replaced by a conveyor belt or a screw-slider mechanism, which has the same effect and is not described in detail here.

[0066] In some embodiments, the secondary battery preparation equipment 1000 also includes an alarm device (not shown) electrically connected to the control device. When the detection device 400 detects that the distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700 exceeds a preset range, the control device controls the flipping device 300 and the transmission device 800 to reposition the insulating film 600 multiple times according to a preset number of times. If the detection result still does not meet the requirements, the control device can control the alarm device to sound an alarm to remind the operator to manually intervene and control the alignment accuracy of the insulating film 600.

[0067] Optionally, the alarm device may be a sound alarm device, an optical signal alarm device, or a combination of the two, or may be a warning message that pops up on a display device, which will not be described in detail here.

[0068] An embodiment of the present invention further provides a method for preparing a secondary battery, which is applied to the above-mentioned secondary battery preparation device 1000, and the preparation method comprises: S100. Flip the insulating film so that the insulating film covers the surface of the battery cell; S200. Obtaining the actual distance between the edge of the insulating film close to the battery top cover and the battery top cover, and determining whether the actual distance is within a preset range; S201. If the actual distance is outside the preset range, reposition the insulating film and obtain the actual distance between the insulating film and the battery top cover again until the actual distance is within the preset range; S202. If the actual distance is within a preset range, the insulating film is pressed and the insulating film and the battery top cover are welded; S300. Perform appearance inspection on the welding position to determine whether the appearance of the welding position meets the preset requirements; S301. If the preset requirements are not met, the insulating film is removed and the welding is performed again until the preset requirements are met; S302. If it meets the preset requirements, the processing is completed and the material is cut.

[0069] For step S100, before the insulating film 600 is turned over and placed on the surface of the battery cell 500, the battery cell 500 and the insulating film 600 need to be placed in corresponding positions, for example, the battery cell is placed on the hot pressing table 210, and the insulating film 600 is placed on the film placement table 240. Specifically, the battery cell 500 can be transported to the hot pressing table 210 and the insulating film 600 can be transported to the film placement table 240 using a conveyor belt, roller or other equipment for transporting materials. It is understandable that, in order to improve production efficiency, the equipment for transporting the battery cell 500 and the equipment for transporting the insulating film 600 can be set independently of each other to independently transport the corresponding materials at the same time.

[0070] In addition, other automatic loading devices may be provided to place the battery top cover 700 on a specific position of the hot pressing platform 210 while loading the battery cells 500 and the insulating film 600, so as to prepare for the subsequent hot melt connection process.

[0071] After the materials are in place, and before detecting the actual distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700, the size of the battery cell 500 can be detected to determine the specifications of the secondary battery to be manufactured, so as to call the corresponding data range in the storage medium storing the preset standard data. Specifically, after the detection device 400 detects the contour, large surface, thickness and other parameters of the battery cell 500 and determines the relevant standard parameters of the secondary battery to be manufactured, the relevant standard parameters are retrieved from the control device as the comparison object of the subsequent detection results. The control device controls the flipping device 300 to flip the insulating film 600 to a suitable position based on the detection results sent by the detection device 400.

[0072] For step S200, after calling the relevant parameters, the detection device 400 detects the actual distance between the edge of the insulating film 600 close to the battery top cover 700 and the battery top cover 700, and compares the detection result with the called standard parameters to determine whether the actual distance is within a preset range.

[0073] It should be noted that, in some cases, the determination of whether the actual distance meets the requirements is completed by the control device. Specifically, the detection device 400 sends the detection result to the control device, and the control device receives the detection result and compares the detection result with the standard parameter. In other cases, the determination of whether the actual distance meets the requirements is completed by the detection device 400. Before, during or after the detection device 400 detects the above-mentioned actual distance, the control device sends the corresponding standard parameters to the detection device 400 according to the specifications of the detected battery cell 500. The detection device 400 receives the standard parameters and compares and analyzes the detection result with the received standard parameters.

[0074] For step S201, specifically, if the detected actual distance exceeds the preset data range in the standard parameters, indicating that the current alignment accuracy of the insulating film 600 does not meet the processing requirements, the control device sends a control instruction to the flipping device 300, and the flipping device 300 picks up the insulating film 600 on the battery cell 500 again, and adjusts the position before placing the insulating film 600 on the battery cell 500. After that, step S200 is performed again until the detected actual distance is within the preset data range of the standard parameters.

[0075] In some embodiments, the upper limit of the number of times of automatically re-placing the insulating film 600 and / or automatically re-testing can be preset according to actual conditions. For example, the upper limit can be set to 3 times. When the insulating film is re-placed 3 times and the corresponding test results still do not meet the requirements, the alarm device sounds an alarm, and manual access is performed to ensure smooth production process.

[0076] For step S202, specifically, if the actual distance detected is within the data range preset in the standard parameters, indicating that the current positioning accuracy of the insulating film 600 meets the processing requirements, the control device sends a control instruction to the clamping mechanism 220 and the hot melt mechanism 230, so that the clamping plate 221 presses the battery cell 500 and the insulating film 600, and the heating module of the hot melt mechanism 230 heats the hot melt head 231, and drives the hot melt head 231 to perform hot melt connection on the insulating film 600 and the battery top cover 700.

[0077] In some embodiments, the process further includes S203. Before or when the insulating film 600 is pressed, the control device controls the flipping device 300 to clamp the insulating film 600 again and stretch and flatten the insulating film 600. In this way, the insulating film 600 can be flatly attached to the surface of the battery cell 500 after being hot-melt-connected with the battery top cover 700.

[0078] For step S300, after the hot melt connection is completed, the detection device 400 can detect the position where the insulating film 600 and the battery top cover 700 are welded, or simultaneously detect the surface of the battery cell 500 to determine whether the appearance of the welded product meets the expected requirements.

[0079] For step S301, when it is detected that the appearance of the processed product does not meet the requirements, manual control is performed. Specifically, the products that do not meet the requirements are manually excluded from the production line, and the insulating film 600 on the product is removed, and the remaining battery cells 500 and battery top cover 700 are placed back into the loading equipment for re-loading and processing until the processed products meet the requirements.

[0080] Regarding step S302, when it is detected that the appearance of the processed product meets the requirements, the processed product can be removed by the automatic unloading device and enter the subsequent processing steps.

[0081] The above is a detailed introduction to the preparation equipment and preparation method of the secondary battery provided by the embodiment of the present invention. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above implementation mode is only used to help understand the idea of ​​the present invention. There may be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A secondary battery preparation device, characterized in that: include: Bracket; A hot melt device, comprising a hot press table fixed on the bracket, and a pressing mechanism and a hot melt mechanism arranged opposite to the hot press table, wherein the pressing mechanism comprises a pressing plate, and the hot melt mechanism comprises a hot melt head arranged at a distance from the pressing plate, the orthographic projection of the part of the pressing plate close to the hot melt head on the hot press table can cover the orthographic projection of the part of the insulating film close to the hot melt head on the hot press table, and the side wall of the pressing plate close to the hot melt head is provided with an avoidance groove for the hot melt head to pass through; the hot press table is used to carry the battery cell, the pressing plate is used to press and fix the insulating film on the surface of the battery cell, and the hot melt head is used to weld the insulating film and the battery top cover; A flipping device is arranged opposite to the hot melt device and is movably arranged on the bracket, and is used to clamp the insulating film and flip the insulating film to the hot pressing table so that the insulating film covers the surface of the battery cell; A detection device, arranged opposite to the flipping device and adjacent to the hot melt device, the detection device is used to detect the gap between the insulating film on the battery cell and the battery top cover in real time after the flipping device flips the insulating film; A control device is electrically connected to the hot melt device, the flip device and the detection device, and is used to send operation commands to the hot melt device, the flip device and the detection device, and receive detection information sent by the detection device.

2. The secondary battery manufacturing device according to claim 1, characterized in that: The hot melt mechanism also includes a first support member, a hot melt driving member and a hot melt head fixing member, the first support member is fixed to the bracket, there are multiple hot melt heads, and the multiple hot melt heads are fixed to the hot melt head fixing member at intervals, the hot melt driving member is fixed to the first support member or the hot melt head fixing member, and the hot melt driving member is used to drive the hot melt head fixing member to drive the multiple hot melt heads to move in the vertical direction; there are multiple avoidance grooves, and the avoidance grooves and hot melt heads are arranged one by one.

3. The secondary battery manufacturing device according to claim 2, characterized in that: The clamping mechanism includes a first mounting member and a clamping driving member. The first mounting member and the hot melt head fixing member are fixed on the same side of the first supporting member. The clamping plate is movably connected to the first mounting member and is located on the side of the hot melt head fixing member facing the hot pressing platform. The clamping driving member is fixed to the first mounting member. The clamping driving member is used to drive the clamping plate to clamp the insulating film or release the insulating film.

4. The secondary battery manufacturing device according to claim 2, characterized in that: The detection device is disposed adjacent to the first support member and is used to detect whether the distance between the edge of the insulating film close to the battery top cover and the battery top cover after flipping is within a preset range. If it is within the preset range, the detection device sends the first detection information to the control device, and the control device controls the pressing mechanism to press the insulating film and controls the hot melt mechanism to weld the insulating film and the battery top cover; If it exceeds the preset range, the detection device sends second detection information to the control device, the control device controls the flip device to clamp the insulating film again and adjust the position of the insulating film, and the detection device performs detection again.

5. The secondary battery manufacturing device according to claim 1, characterized in that: The flipping device comprises a second support member, a cantilever driving member, two cantilevers and two clamping mechanisms, wherein the second support member is movably arranged on the bracket, the cantilever driving member is fixed to the second support member, the two cantilevers are arranged in parallel and are movably arranged on the second support member, and the two clamping mechanisms are arranged opposite to each other and are fixed to the two cantilevers in a one-to-one correspondence; The cantilever driving member is transmission-connected to the two cantilevers to drive the two cantilevers to drive the two clamping mechanisms to move closer to each other or farther away from each other.

6. The secondary battery manufacturing device according to claim 5, characterized in that: The clamping mechanism includes a power assembly and a clamping claw connected to the power assembly in a transmission manner. The power assembly is fixed to the cantilever. The power assembly is used to drive the clamping claw to clamp the insulating film or release the insulating film, and drive the clamping claw to flip the insulating film.

7. The secondary battery manufacturing device according to claim 6, characterized in that: The power assembly includes a rotating motor and a clamping jaw driving member, wherein the rotating motor is fixed to the cantilever, the clamping jaw driving member is transmission-connected to the rotating shaft of the rotating motor, and the clamping jaw is transmission-connected to the clamping jaw driving member; The rotary motor is used to drive the clamping jaw driving member to rotate, and the clamping jaw driving member is used to drive the clamping jaw to open, close and / or rotate.

8. The secondary battery manufacturing device according to claim 6, characterized in that: The clamping claw comprises two clamping arms arranged opposite to each other, the two clamping arms have clamping ends for clamping the insulating film, the two clamping ends are provided with flexible clamping parts, and the two clamping arms clamp the insulating film through the flexible clamping parts.

9. The secondary battery manufacturing device according to claim 1, characterized in that: It also includes a transmission device fixed on the bracket, the transmission device includes a first driving mechanism arranged on the bracket and a second driving mechanism fixedly connected to the first driving mechanism, the second driving mechanism is fixedly connected to the flipping device; the first driving mechanism is used to drive the second driving mechanism to drive the flipping device to move along a first direction, the second driving mechanism is used to drive the flipping device to move along a second direction, and the first direction is perpendicular to the second direction.

10. A method for preparing a secondary battery, characterized in that: Turning over the insulating film so that the insulating film covers the surface of the battery cell; Obtaining an actual distance between an edge of the insulating film close to the battery top cover and the battery top cover, and determining whether the actual distance is within a preset range; If the actual distance is outside the preset range, reposition the insulating film and obtain the actual distance between the insulating film and the battery top cover again until the actual distance is within the preset range; If the actual distance is within a preset range, the insulating film is pressed tightly, and the insulating film and the battery top cover are welded; Perform appearance inspection on the welding position to determine whether the appearance of the welding position meets the preset requirements; If it does not meet the preset requirements, remove the insulating film and re-weld it until it meets the preset requirements; If it meets the preset requirements, the processing is completed and cutting can be carried out.

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