Automated film pasting line for power battery cover plate

Abstract

The application discloses an automatic film pasting production line for power battery cover plates, which comprises a power battery cover plate feeding conveying line, a turnover feeding mechanism, a carrier circulating line, an electrode column synchronous film pasting station, a first pin insulating sheet film pasting station and a second pin insulating sheet film pasting station. The electrode column synchronous film pasting station comprises an electrode column film pasting device provided with an electrode column protective film supply mechanism and an electrode column film pasting mechanism. The first pin insulating sheet film pasting station and the second pin insulating sheet film pasting station each comprise a pin insulating sheet film pasting device provided with a pin insulating sheet protective film supply mechanism, a pin insulating sheet film pasting mechanism and a film pasting support mechanism. The application meets the demand for automatic film pasting of dead angle parts of the battery cover plate and satisfies the demand for double-position film pasting without needing to turn or turn over the battery cover plate. The application can realize turning and flattening operations, so that the film pasting qualified rate is significantly improved. The automatic operation is smooth, stable and efficient, the production efficiency is improved, and the product film pasting yield is ensured.

Description

Technical Field

[0001] This invention relates to an automated film application production line for power battery cover plates, belonging to the technical field of automated production lines. Background Technology

[0002] Automation technology is widely used in industry, agriculture, military, scientific research, transportation, commerce, medicine, services, and households. Adopting automation technology not only liberates people from heavy physical labor, some mental labor, and harsh and dangerous working environments, but also expands human organ functions, greatly improves labor productivity, and enhances humanity's ability to understand and transform the world.

[0003] A power battery is a power source that provides power to tools, primarily referring to the batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries are characterized by their ultra-long lifespan, safe operation, high-current 2C fast charging and discharging capability, high temperature resistance, large capacity, no memory effect, small size, and light weight. They mainly include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. They differ from starter batteries used in automobile engines, primarily employing valve-sealed lead-acid batteries, open-type tubular lead-acid batteries, and lithium iron phosphate batteries.

[0004] The production process of power batteries involves the application of a large number of automated equipment to meet the automated production needs of its various components and assembly. Among them, the power battery has a power battery cover plate, which includes a cover plate body and two electrode post assemblies arranged at intervals on one side of the cover plate body. The electrode post assembly generally includes an electrode post and an electrode post pin connected to the electrode post. The pin insulating sheets are respectively provided on the opposite wall surface of the two electrode post pins. That is, the cover plate body and the two electrode post assemblies form a U-shaped structure.

[0005] During the production process, the power battery cover needs to be covered with a protective film. In the traditional process, the side of the cover body away from the electrode post assembly, the exposed surfaces of the two electrode post pins facing away from each other, and the surface of the explosion-proof valve all need to be covered with a protective film. This ensures that the power battery cover is well protected during turnover and transportation, and ensures that the quality of the back-end assembly is reliable and stable.

[0006] In actual production, it was found that although the surfaces of the electrode posts and the lead insulating sheets are located inside the U-shaped structure, they are scratched during transportation and assembly, which affects the quality of the final assembled battery. Therefore, before the power battery cover leaves the factory, a protective film needs to be applied to the surfaces of the electrode posts and the lead insulating sheets to protect the product.

[0007] Because both the electrode post surface and the lead insulating sheet surface are on the inside, traditional automated film application equipment struggles to meet its automated operation requirements. Since the bonding surfaces are not on the same plane, adjustments to the orientation and position of the power battery cover during rotation and switching are necessary. However, the presence of the electrode post assembly makes this positional adjustment difficult. Furthermore, the lead insulating sheet has rib-like protrusions, while the protective film is generally a flat patch structure, making it difficult to achieve a perfectly flat fit. Additionally, the electrode post leads undergo compressive deformation during the bonding process, affecting product yield. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of the prior art and to solve the problems of traditional automated film application, which cannot achieve the bonding of protective films on multiple inner surfaces of U-shaped structural components and is prone to damage to the product during the bonding process. This invention proposes an automated film application production line for power battery covers.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] An automated film application production line for power battery cover plates, wherein the power battery cover plate includes a cover plate body and two electrode post assemblies spaced apart on one side of the cover plate body. Each electrode post assembly includes an electrode post and an electrode post pin connected to the electrode post. The two electrode post pins are respectively provided with pin insulating sheets on their opposite walls.

[0011] The automated film application production line includes a power battery cover plate feeding and conveying line, a carrier circulation line with several cover plate carriers, an electrode post synchronous film application station, a first pin insulating sheet film application station, and a second pin insulating sheet film application station arranged sequentially along the carrier circulation line. A turnover feeding mechanism for transferring and feeding power battery cover plates is provided between the power battery cover plate feeding and conveying line and the carrier circulation line.

[0012] The electrode post synchronous film application station includes two mirror-symmetrically arranged electrode post film application devices on both sides of the carrier circulation line. Each electrode post film application device includes an electrode post protective film supply mechanism for providing protective film to the electrode posts and an electrode post film application mechanism for performing film application operations by rotating between the electrode post protective film supply mechanism and the cover plate carrier. The electrode post film application mechanism includes a negative pressure turnover end with horizontal linear displacement and vertical displacement.

[0013] The first pin insulating sheet film application station and the second pin insulating sheet film application station each include a pin insulating sheet film application device. The pin insulating sheet film application device includes a pin insulating sheet protective film supply mechanism for providing a protective film for the pin insulating sheet, a pin insulating sheet film application mechanism for performing film application operations by rotating between the pin insulating sheet protective film supply mechanism and the cover plate carrier, and a film application support mechanism for supporting the side of the electrode post pin away from the pin insulating sheet. The pin insulating sheet film application mechanism includes a transfer base with horizontal linear displacement and vertical displacement, and the transfer base is provided with a negative pressure transfer end with rotational turning displacement. The film application support mechanism includes a support abutment end with linear displacement.

[0014] Preferably, the electrode post film application device includes a bottom detection camera module facing the top, which is disposed on the turnover path of the negative pressure turnover end, and a top film application guide camera module facing the cover plate carrier, which is disposed on the top of the carrier circulation line. The bottom detection camera module and the top film application guide camera module are respectively communicatively connected to the electrode post film application mechanism.

[0015] Preferably, the electrode post film application mechanism includes a carrier column disposed between the electrode post protective film supply mechanism and the carrier circulation line. The carrier column is provided with a horizontal rail and a top module carrier for mounting the top film application guide camera module. The horizontal rail is provided with a horizontal slider having horizontal linear displacement. The horizontal slider is provided with a lifting slide having lifting displacement. The negative pressure turnover end is disposed on the lifting slide.

[0016] Preferably, the top-mounted film-guided camera module is provided with an electrode post film-attachment detection unit for detecting electrode post film attachment.

[0017] Preferably, the pin insulating sheet bonding device includes a position detection camera module for detecting the position of the pin insulating sheet protective film picked up on the negative pressure transfer end, and a bonding surface detection guide camera module having a bonding surface facing the pin insulating sheet. The position detection camera module and the bonding surface detection guide camera module are respectively communicatively connected to the pin insulating sheet bonding mechanism.

[0018] Preferably, the pin insulating sheet bonding mechanism includes a gantry, a first horizontal slider with horizontal displacement disposed on the gantry, and a second horizontal slider with displacement perpendicular to the first horizontal slider disposed on the first horizontal slider. The second horizontal slider is provided with a transfer base with lifting displacement, and the transfer base includes a rotating swing arm for mounting the negative pressure transfer end.

[0019] Preferably, the first pin insulating sheet film application station and the second pin insulating sheet film application station are respectively provided with a smoothing and bonding station on the side away from the electrode post synchronous film application station, and the smoothing and bonding station includes a smoothing and bonding device.

[0020] The smoothing and bonding device includes a smoothing and bonding mechanism and a smoothing support mechanism. The smoothing and bonding mechanism includes a smoothing and bonding block with horizontal linear displacement and vertical displacement. The smoothing support mechanism includes a smoothing abutment end with linear displacement.

[0021] Preferably, the smoothing and bonding device and the pin insulating sheet bonding device are respectively provided with a power battery cover pressing and locking mechanism for pressing and locking the power battery cover, and the power battery cover pressing and locking mechanism includes a locking and pressing cover with lifting displacement.

[0022] Preferably, the carrier circulation line is provided with protective film bonding detection mechanisms for detecting the protective film of the corresponding pin insulating sheet.

[0023] Preferably, the end of the carrier circulation line opposite to the power battery cover loading and conveying line is provided with a sorting and unloading device;

[0024] The sorting and unloading device includes a good product conveyor line, an NG product conveyor line, and a cover plate unloading and turnover mechanism for switching displacement between the cover plate carrier and the good product conveyor line and between the cover plate carrier and the NG product conveyor line.

[0025] The beneficial effects of this invention are mainly reflected in:

[0026] 1. Meets the need for automated film application to the dead corners of the power battery cover, and can meet the dual-position film application requirements without turning or flipping the battery cover.

[0027] 2. It can achieve steering, bonding, and smoothing operations, which significantly improves the film application qualification rate.

[0028] 3. The automated operation is smooth, stable, and efficient, which improves production efficiency and ensures the yield rate of product film application.

[0029] 4. The overall layout is ingenious and compact, and the coordination between workstations is smooth and stable. Attached Figure Description

[0030] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the automated film application production line for power battery cover plates according to the present invention.

[0032] Figure 2This is a schematic diagram of another perspective of the automated film application production line for power battery cover plates according to the present invention.

[0033] Figure 3 This is a top view schematic diagram of the automated film application production line for power battery cover plates according to the present invention.

[0034] Figure 4 This is a side view of the automated film application production line for power battery cover plates according to the present invention.

[0035] Figure 5 This is a schematic diagram of the electrode post film-attaching device in this invention.

[0036] Figure 6 This is a schematic diagram of the electrode post film-attaching device in this invention from another perspective.

[0037] Figure 7 This is a side view of the electrode post film-attaching device in this invention.

[0038] Figure 8 This is a schematic diagram of the pin insulating film bonding device in this invention.

[0039] Figure 9 This is a schematic diagram of the pin insulating film bonding device from another perspective in this invention.

[0040] Figure 10 This is a side view of the pin insulating film attaching device in this invention.

[0041] Figure 11 This is a schematic diagram of the smoothing and bonding device in this invention.

[0042] Figure 12 This is a schematic diagram of the smoothing and bonding device from another perspective in this invention.

[0043] Figure 13 This is a side view of the smoothing and bonding device in this invention.

[0044] Figure 14 This is a schematic diagram of the protective film bonding detection mechanism in this invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0047] This invention provides an automated film-applying production line for power battery cover plates, such as... Figures 1 to 7 As shown, the power battery cover 100 includes a cover body 200 and two electrode post assemblies 300 spaced apart on one side of the cover body. Each electrode post assembly 300 includes an electrode post 400 and an electrode post pin 500 connected to the electrode post. The opposite walls of the two electrode post pins are respectively provided with pin insulating sheets 600. During the film application operation, electrode post protective films 700 need to be applied to the two electrode posts 400 respectively, and pin insulating sheet protective films 800 need to be applied to the two pin insulating sheets 600 respectively.

[0048] In this case, if Figures 1 to 14 The automated film application production line includes a power battery cover plate feeding and conveying line 1, a carrier circulation line 2 equipped with several cover plate carriers 20, an electrode post synchronous film application station 3 arranged sequentially along the carrier circulation line, a first pin insulating sheet film application station 4a, and a second pin insulating sheet film application station 4b. A turnover feeding mechanism 5 for transferring and feeding power battery cover plates is provided between the power battery cover plate feeding and conveying line and the carrier circulation line.

[0049] The electrode post synchronous film application station 3 includes two mirror-symmetrically arranged electrode post film application devices 30 on both sides of the carrier circulation line. Each electrode post film application device 30 includes an electrode post protective film supply mechanism 31 for providing protective film to the electrode posts and an electrode post film application mechanism 32 for performing film application operations by rotating between the electrode post protective film supply mechanism and the cover plate carrier. The electrode post film application mechanism 32 includes a negative pressure turnover end 320 with horizontal linear displacement and vertical displacement.

[0050] The first pin insulating sheet coating station and the second pin insulating sheet coating station each include a pin insulating sheet coating device 40. The pin insulating sheet coating device 40 includes a pin insulating sheet protective film supply mechanism 41 for providing the pin insulating sheet protective film, a pin insulating sheet coating mechanism 42 for coating operations by rotating between the pin insulating sheet protective film supply mechanism and the cover plate carrier, and a coating support mechanism 43 for supporting the side of the electrode post pin away from the pin insulating sheet. The pin insulating sheet coating mechanism 42 includes a transfer base 420 with horizontal linear displacement and vertical displacement. The transfer base 420 is provided with a negative pressure transfer end 4200 with rotational displacement. The coating support mechanism 43 includes a support abutment end 430 with linear displacement.

[0051] Detailed implementation process and principle explanation:

[0052] Firstly, the power battery cover feeding conveyor line 1 is an existing technology. It is used for the automated transportation and feeding of power battery covers in a row. The feeding end of the conveyor line 1 can be manual or automated.

[0053] When the power battery cover is conveyed to the feeding end, the turnover feeding mechanism 5 picks up the power battery cover from the power battery cover conveyor line 1 and transfers it to the cover carrier 20 of the carrier circulation line 2. It should be noted that the carrier circulation line 2 is a fixture that carries the cover carrier 20 and circulates between various workstations. Generally, it only needs to meet the requirements of workstation switching and circulation. In this case, the cover carrier 20 includes a supporting mounting position 21 and several guide positioning pulleys 22 around the outer periphery of the supporting mounting position 21. That is, the cover carrier 20 can achieve precise guidance, positioning, and mounting of the power battery cover. As for the turnover feeding mechanism 5, its handling is prior art. It is generally a negative pressure picking end with linear displacement and lifting displacement. Of course, sampling robotic arms with negative pressure picking and clamping transfer mechanisms or methods are also within the protection scope of this case.

[0054] After the power battery cover is mounted on the cover carrier 20, the cover carrier 20 performs a switching operation. The cover carrier first runs to the electrode post synchronous film application station 3. At this time, the electrode post protective film supply mechanism 31 supplies material and provides a single piece of electrode post protective film. At this time, the negative pressure turnover end 320 of the electrode post film application mechanism 32 adsorbs the electrode post protective film and applies it to the electrode post 400.

[0055] It should be noted that the electrode post protective film supply mechanism 31 generally includes a material roll supply section and a material strip turnover line. The material supply needs of a single protective film are met by material strip conveying and turnover line folding. This is existing technology and will not be described in detail here. In addition, in this case, two mirror-symmetrical electrode post film application devices 30 are arranged, which can meet the synchronous pressing needs of two electrode post protective films. In this way, the forces at both ends are relatively coordinated, and the application operation is relatively smooth and stable.

[0056] After the electrode post synchronous film application station 3 is completed, the carrier circulation line will sequentially transport the cover plate carrier to the first pin insulating sheet film application station and the second pin insulating sheet film application station for separate protective film application.

[0057] During the bonding operation at the first pin insulating sheet bonding station and the second pin insulating sheet bonding station, the pin insulating sheet protective film supply mechanism 41 supplies single pin insulating sheet protective films. The pin insulating sheet protective film supply mechanism 41 has a similar structure to the electrode post protective film supply mechanism 31 and both belong to the prior art, so it will not be described in detail here.

[0058] During the film application process, the lead insulating sheet film application mechanism 42 moves the transfer base 420 to align with the lead insulating sheet protective film supply mechanism 41 and the cover plate carrier. When picking up the film, the negative pressure transfer end 4200 picks up the horizontal protective film from the top to the bottom, and after adsorption, it flips 90° so that the protective film faces the lead insulating sheet 600. At this time, the support abutment end 430 of the film application support mechanism 43 supports the electrode post lead 500. At this time, the negative pressure transfer end 4200 performs the film application operation towards the lead insulating sheet 600 under the displacement of the transfer base 420.

[0059] In one specific embodiment, such as Figures 5 to 7 As shown, the electrode post film application device 30 includes a bottom detection camera module 33 facing the top and set on the turnover path of the negative pressure turnover end, and a top film application guide camera module 34 facing the cover plate carrier and set on the top of the carrier circulation line. The bottom detection camera module and the top film application guide camera module are respectively connected to the electrode post film application mechanism.

[0060] Specifically, the negative pressure turnover end 320 of the electrode post film application mechanism 32 has two perpendicular horizontal linear displacements. When the electrode post protective film 700 is fed and aligned at the cover plate carrier station, there will be a certain positional deviation. The bottom detection camera module 33 and the top film application guide camera module 34 can realize visual guidance of the relative position of the film application, thereby making the alignment accurate and improving the bonding qualification rate.

[0061] In one specific embodiment, such as Figures 5 to 7 As shown, the electrode post film application mechanism 32 includes a carrier column 321 disposed between the electrode post protective film supply mechanism and the carrier circulation line. The carrier column is provided with a horizontal rail 322 and a top module carrier 323 for mounting the top film application guide camera module. The horizontal rail 322 is provided with a horizontal slider 3221 having horizontal linear displacement. The horizontal slider is provided with a lifting slide 3222 having lifting displacement. The negative pressure turnover end 320 is disposed on the lifting slide 3222.

[0062] Specifically, the support column 321 meets the spatial layout requirements and enables the mounting of the horizontal rail 322 and the top module support frame 323. The horizontal slider 3221 and the lifting slide 3222 make it easy to adjust the rotation position of the negative pressure turnover end 320. Of course, a linear displacement can also be added to the lifting slide 3222 to make the stroke control of the negative pressure turnover end 320 more abundant and the layout more compact.

[0063] In one specific embodiment, the top-mounted film-guided camera module 34 is provided with an electrode post film-attachment detection unit for detecting electrode post film attachment.

[0064] That is, the electrode post film-applying detection unit can realize the bonding detection after film application. When a defect occurs, the defect information is provided. The back-end operation at the first pin insulating film application station and the second pin insulating film application station does not perform bonding operations.

[0065] In one specific embodiment, such as Figures 8 to 10 As shown, the pin insulating sheet bonding device 40 includes a position detection camera module 44 for detecting the position of the pin insulating sheet protective film picked up on the negative pressure transfer end, and a bonding surface detection guide camera module 45 having a bonding surface facing the pin insulating sheet. The position detection camera module and the bonding surface detection guide camera module are respectively connected to the pin insulating sheet bonding mechanism.

[0066] That is, visual guidance bonding operation is achieved through positional detection camera module 44 and bonding surface detection guidance camera module 45.

[0067] In one specific embodiment, such as Figures 8 to 10 As shown, the pin insulating sheet bonding mechanism 42 includes a gantry 421, a first horizontal slider 422 with horizontal displacement disposed on the gantry 421, and a second horizontal slider 423 with displacement perpendicular to the first horizontal slider disposed on the first horizontal slider. The second horizontal slider is provided with a transfer base 420 with lifting displacement. The transfer base includes a rotating swing arm 4201 for mounting the negative pressure transfer end.

[0068] Specifically, during the film application process, alignment is achieved through the first horizontal slider 422, the second horizontal slider 423, and the transfer base 420. The orientation of the negative pressure transfer end is adjusted by rotating the swing arm 4201 to meet the two orientation requirements for material picking and bonding.

[0069] In one specific embodiment, such as Figures 11 to 13 As shown, the first pin insulating sheet film application station and the second pin insulating sheet film application station are respectively provided with smoothing and bonding stations 6 on the side opposite to the electrode post synchronous film application station. The smoothing and bonding station includes a smoothing and bonding device 60.

[0070] The smoothing and bonding device 60 includes a smoothing and bonding mechanism 61 and a smoothing support mechanism 62. The smoothing and bonding mechanism 61 includes a smoothing and bonding block 610 with horizontal linear displacement and vertical displacement, and the smoothing support mechanism includes a smoothing abutment end 620 with linear displacement.

[0071] Specifically, under normal circumstances, the bonding surface of the lead insulating sheet 600 has various specifications. When it is flat, a single press can achieve the bonding and flatness requirements. However, when there are raised ribs 601 on the lead insulating sheet 600, it cannot achieve a reliable bonding operation. Therefore, the design of the smoothing bonding mechanism 61 was adopted. During the smoothing operation, the back support of the smoothing abutment end 620 is used for bonding. The smoothing bonding block 610 achieves the smoothing trajectory along the direction of the raised ribs 601 through lifting and horizontal displacement adjustment. In addition, it should be noted that the smoothing bonding block 610 has elastic floating displacement to meet the floating bonding and smoothing requirements.

[0072] In one specific embodiment, such as Figures 1 to 4 , Figures 11 to 13 As shown, the smoothing and bonding device and the lead insulating sheet bonding device are respectively provided with a power battery cover pressing and locking mechanism 7 for pressing and locking the power battery cover. The power battery cover pressing and locking mechanism 7 includes a locking and pressing cover 70 with lifting displacement.

[0073] That is, during the film application and smoothing operations, the power battery cover is locked by the locking and pressing cover plate 70, making the film application and smoothing operations more reliable.

[0074] In one specific embodiment, such as Figures 1 to 4 , Figure 14 As shown, the carrier circulation line is equipped with protective film bonding detection mechanisms 8, which are used for detecting the protective film of the corresponding pin insulating sheet.

[0075] The protective film bonding inspection mechanism 8 can perform quality inspection after bonding. It should be noted that when there is a smoothing operation, it is located after the smoothing operation.

[0076] In one specific embodiment, such as Figures 1 to 4 As shown, a sorting and unloading device 9 is provided at one end of the carrier circulation line away from the power battery cover loading and conveying line.

[0077] The sorting and unloading device 9 includes a good product conveyor line 91, an NG product conveyor line 92, and a cover plate unloading and turnover mechanism 90 for switching displacement between the cover plate carrier and the good product conveyor line and between the cover plate carrier and the NG product conveyor line.

[0078] Based on the results of the front-end film application test, the products are classified accordingly. After being picked up by the cover unloading and turnover mechanism 90 under negative pressure, they are placed on the good product conveyor line 91 or the NG product conveyor line 92 to achieve classification and screening.

[0079] The above description demonstrates that the automated film-applying production line for power battery covers meets the need for automated film application to hard-to-reach areas of the battery covers, fulfilling dual-position film application requirements without requiring the battery covers to be turned or flipped. It enables turning, applying, and smoothing operations, significantly improving the film application pass rate. The automated operation is smooth, stable, and efficient, enhancing production efficiency and ensuring a high product yield. The overall layout is ingenious and compact, with smooth and stable coordination between workstations.

[0080] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0081] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An automated film-applying production line for a power battery cover plate, the power battery cover plate comprising a cover plate body and two electrode post assemblies spaced apart on one side of the cover plate body, each electrode post assembly comprising an electrode post and electrode post leads connected to the electrode post, wherein the opposing walls of the two electrode post leads are respectively provided with lead insulating sheets, characterized in that: The automated film application production line includes a power battery cover plate feeding and conveying line, a carrier circulation line with several cover plate carriers, an electrode post synchronous film application station, a first pin insulating sheet film application station, and a second pin insulating sheet film application station arranged sequentially along the carrier circulation line. A turnover feeding mechanism for transferring and feeding power battery cover plates is provided between the power battery cover plate feeding and conveying line and the carrier circulation line. The electrode post synchronous film application station includes two mirror-symmetrically arranged electrode post film application devices on both sides of the carrier circulation line. Each electrode post film application device includes an electrode post protective film supply mechanism for providing protective film to the electrode posts and an electrode post film application mechanism for performing film application operations by rotating between the electrode post protective film supply mechanism and the cover plate carrier. The electrode post film application mechanism includes a negative pressure turnover end with horizontal linear displacement and vertical displacement. The first pin insulating sheet film application station and the second pin insulating sheet film application station each include a pin insulating sheet film application device. The pin insulating sheet film application device includes a pin insulating sheet protective film supply mechanism for providing a protective film for the pin insulating sheet, a pin insulating sheet film application mechanism for performing film application operations by rotating between the pin insulating sheet protective film supply mechanism and the cover plate carrier, and a film application support mechanism for supporting the side of the electrode post pin away from the pin insulating sheet. The pin insulating sheet film application mechanism includes a transfer base with horizontal linear displacement and vertical displacement, and the transfer base is provided with a negative pressure transfer end with rotational turning displacement. The film application support mechanism includes a support abutment end with linear displacement.

2. The automated film-applying production line for power battery cover plates according to claim 1, characterized in that: The electrode post film application device includes a bottom detection camera module facing the top, which is set on the turnover path of the negative pressure turnover end, and a top film application guide camera module facing the cover plate carrier, which is set on the top of the carrier circulation line. The bottom detection camera module and the top film application guide camera module are respectively connected to the electrode post film application mechanism.

3. The automated film-applying production line for power battery cover plates according to claim 2, characterized in that: The electrode post film application mechanism includes a carrier column disposed between the electrode post protective film supply mechanism and the carrier circulation line. The carrier column is provided with a horizontal rail and a top module carrier for mounting the top film application guide camera module. The horizontal rail is provided with a horizontal slider with horizontal linear displacement. The horizontal slider is provided with a lifting slide with lifting displacement. The negative pressure turnover end is disposed on the lifting slide.

4. The automated film-applying production line for power battery cover plates according to claim 2, characterized in that: The top-mounted film-guided camera module is equipped with an electrode post film-attachment detection unit for detecting electrode post film attachment.

5. The automated film-applying production line for power battery cover plates according to claim 1, characterized in that: The pin insulating sheet bonding device includes a position detection camera module for detecting the position of the pin insulating sheet protective film picked up on the negative pressure transfer end, and a bonding surface detection guide camera module having a bonding surface facing the pin insulating sheet. The position detection camera module and the bonding surface detection guide camera module are respectively communicatively connected to the pin insulating sheet bonding mechanism.

6. The automated film-applying production line for power battery cover plates according to claim 5, characterized in that: The pin insulating sheet bonding mechanism includes a gantry, a first horizontal slider with horizontal displacement disposed on the gantry, and a second horizontal slider with displacement perpendicular to the first horizontal slider disposed on the first horizontal slider. The second horizontal slider is provided with a transfer base with lifting displacement. The transfer base includes a rotating swing arm for mounting the negative pressure transfer end.

7. The automated film-applying production line for power battery cover plates according to claim 1, characterized in that: The first pin insulating sheet film application station and the second pin insulating sheet film application station are respectively provided with a smoothing and bonding station on the side away from the electrode post synchronous film application station. The smoothing and bonding station includes a smoothing and bonding device. The smoothing and bonding device includes a smoothing and bonding mechanism and a smoothing support mechanism. The smoothing and bonding mechanism includes a smoothing and bonding block with horizontal linear displacement and vertical displacement. The smoothing support mechanism includes a smoothing abutment end with linear displacement.

8. The automated film-applying production line for power battery cover plates according to claim 7, characterized in that: The smoothing and bonding device and the pin insulating sheet bonding device are respectively provided with a power battery cover pressing and locking mechanism for pressing and locking the power battery cover. The power battery cover pressing and locking mechanism includes a locking and pressing cover with lifting displacement.

9. The automated film-applying production line for power battery cover plates according to claim 1, characterized in that: The carrier circulation line is equipped with protective film bonding detection mechanisms for detecting the protective film of the corresponding pin insulating sheet.

10. The automated film-applying production line for power battery cover plates according to any one of claims 1 to 9, characterized in that: The end of the carrier circulation line opposite to the power battery cover loading and conveying line is equipped with a sorting and unloading device. The sorting and unloading device includes a good product conveyor line, an NG product conveyor line, and a cover plate unloading and turnover mechanism for switching displacement between the cover plate carrier and the good product conveyor line and between the cover plate carrier and the NG product conveyor line.

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