Final-curing mechanism, jet printing apparatus for insulating layer of lithium battery, and jet printing method

Abstract

A final-curing mechanism, a jet printing apparatus for an insulating layer of a lithium battery, and a jet printing method. The final-curing mechanism comprises a housing (100), a final-curing lamp assembly (21) and a temperature-reducing and heat-insulating member, wherein the final-curing lamp assembly (21) is mounted in the housing (100) and is spaced apart from a product to be jet-printed; and the temperature-reducing and heat-insulating member is provided with a heat-insulating layer, wherein the heat-insulating layer is located between the final-curing lamp assembly (21) and said product, and is configured to block or delay the transfer, to said product, of heat generated by the final-curing lamp assembly (21). The temperature-reducing and heat-insulating member can reduce the impact, on said product, of the heat generated by the final-curing lamp assembly, thereby increasing the yield of said product. By means of applying the final-curing mechanism, the jet printing apparatus for an insulating layer of a lithium battery can reduce the impact, on a battery, of the heat generated by the final-curing lamp assembly when implementing a final-curing operation, thereby increasing the yield of the battery. The jet printing method can implement spray-coating and curing of a small amount of paint on said product in a single instance, and can then repeat the spray-coating and curing many times, thereby satisfying the thickness of a coating and also ensuring the curing effect of the paint.

Description

Final curing mechanism, lithium battery insulation layer printing equipment and printing method

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on June 11, 2024, with application numbers 202410747354.6 and 202421319016.4. The entire contents of the above applications are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the field of battery manufacturing technology, for example, to a final curing mechanism, a lithium battery insulation layer printing device, and a printing method using the lithium battery insulation layer printing device.

[0004] Background Art

[0005] A lithium battery includes a casing and a battery cell sealed inside the casing. The outer surface of the casing is wrapped with an insulating layer, which is used to provide insulation and pressure resistance protection for the casing.

[0006] Technical issues

[0007] When inkjet printing equipment applies thick coatings on lithium battery insulation layers, the paint tends to flow, preventing it from evenly depositing to the desired thickness. When the coating is thick, UV rays cannot reach the bottom layer, affecting the curing effect and making it difficult to obtain a high-quality coating. Furthermore, when the inkjet printing equipment uses a final-curing lamp, it generates a lot of heat during operation. If this heat is transferred to the battery, it can easily damage the components within the battery, and in severe cases, even affect the battery's normal operation, resulting in a low battery yield.

[0008] Technical Solutions

[0009] The present application provides a final curing mechanism, comprising:

[0010] case;

[0011] A final curing lamp assembly is installed in the housing and is spaced apart from the product to be printed, and performs final curing on the insulating coating on the product to be printed;

[0012] The cooling and heat-insulating component has a heat-insulating layer, which is arranged to be located between the final curing lamp assembly and the product to be printed to block or delay the heat generated by the final curing lamp assembly from being transferred to the product to be printed.

[0013] The present application also provides a lithium battery insulation layer printing device, comprising a spray curing mechanism and a final curing mechanism, wherein the spray curing mechanism is located upstream of the final curing mechanism, and the spray curing mechanism is configured to spray and initially cure the product to be printed;

[0014] Lithium battery insulation layer printing equipment also includes:

[0015] A material transport fixture configured to carry the product to be printed; and

[0016] The spraying stations and curing stations are arranged in sequence along the set direction; the products to be printed are sprayed and cured at the spraying stations and curing stations respectively;

[0017] The material transport fixture is configured to carry the product to be printed and move between the spraying position and the curing position along a set direction, so that the product to be printed is sprayed and cured twice or more;

[0018] The final curing mechanism is configured to perform final curing on the product to be printed that has been sprayed and cured twice or more.

[0019] The present application also provides a method for printing an insulating layer of a lithium battery, which is applied to a printing device for the insulating layer of a lithium battery. The method for printing an insulating layer of a lithium battery comprises the following steps:

[0020] Parameter preset steps: preset the total thickness of the required coating as H0, preset the thickness of the single spray coating as H x ,in, ,m is a positive integer, and m≥2;

[0021] Printing step: spraying and curing the product to be sprayed m times, each time the product to be printed is sprayed and cured, a spraying operation and a curing operation are sequentially performed on the product to be printed.

[0022] Beneficial effects

[0023] The beneficial effects of this application are:

[0024] The final curing mechanism provided herein includes a housing, a final curing lamp assembly, and a thermal insulation and cooling member. The final curing lamp assembly is installed within the housing and spaced apart from the product to be printed. The thermal insulation member comprises a thermal insulation layer positioned between the final curing lamp assembly and the product to be printed. The thermal insulation layer is configured to block or delay the transfer of heat generated by the final curing lamp assembly to the product to be printed, thereby reducing the impact of the heat generated by the final curing lamp assembly on the product to be printed and improving the yield rate of the product to be printed. The product to be printed may be a battery or other electronic product.

[0025] The lithium battery insulation layer printing equipment provided in the present application includes a material transport jig and spraying and curing positions arranged in sequence along a set manner. The product to be printed is sprayed and cured at the spraying position and the curing position respectively; the material transport jig carries the product to be printed and moves between the spraying position and the curing position along a set direction, so that the product to be printed is sprayed and cured twice or more, thereby realizing a single spraying of a small amount of paint on the product to be printed and curing, and then repeating the spraying and curing multiple times to achieve the desired coating thickness while ensuring the curing effect of the paint.

[0026] In addition, the spraying and curing positions arranged at intervals along the set manner form a spraying and curing position. When the number of spraying and curing positions is one, the material transport jig moves back and forth between the spraying position and the curing position of a spraying and curing position. When the number of spraying and curing positions is two or more, the material transport jig moves in a unidirectional direction and passes through multiple coating and curing positions in sequence. In both cases, a small amount of paint can be sprayed and cured at a single time, and then the spraying and curing can be repeated multiple times to achieve the desired coating thickness while ensuring the curing effect, improving the adhesion of the coating on the product to be printed, and reducing the probability of the coating falling off the product to be printed.

[0027] In addition, by setting a light baffle between the print head and the initial curing lamp assembly, when the initial curing lamp assembly is turned on, the light baffle blocks the light emitted by the initial curing lamp from reaching the nozzle of the print head, preventing the insulating coating remaining on the nozzle from curing and clogging the nozzle under the influence of the light, thereby ensuring the normal operation of the print head and helping to extend the service life of the lithium battery insulation layer printing equipment.

[0028] In addition, by providing a first shell, a second shell, and a transition shell connecting the first shell and the second shell, the spraying and curing processes are both carried out inside the shell, which can not only prevent dust in the external environment from adhering to the coating and affecting the quality of the coating, but also prevent the paint or the smell of the paint from overflowing into the external environment, which is beneficial to improving the working environment.

[0029] In addition, by setting a negative pressure air duct on the side of the printing head, the negative pressure air duct is used to absorb the paint droplets within the spraying range and the dust outside the spraying range, thereby improving the spraying effect and coating quality.

[0030] In addition, by arranging a cooling and heat-insulating member in the second shell, the cooling and heat-insulating member is configured to isolate or delay the heat generated by the final curing lamp assembly from being transferred to the product to be printed, thereby avoiding overheating of the product to be printed and ensuring the stability of the product.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a flow chart of a method for printing an insulating layer of a lithium battery provided by some implementations of the present application;

[0033] FIG2 is a schematic diagram of multiple reciprocating spraying and curing of a product to be printed provided by some implementations of the present application;

[0034] FIG3 is a schematic diagram of a product to be printed provided by some implementations of the present application, wherein multiple spraying and curing are sequentially performed;

[0035] FIG4 is a schematic structural diagram of an exemplary lithium battery insulation layer printing device provided in some implementations of the present application;

[0036] FIG5 is a schematic structural diagram of another exemplary lithium battery insulation layer printing device provided in some implementations of the present application;

[0037] FIG6 is a schematic structural diagram of another exemplary lithium battery insulation layer printing device provided in some implementations of the present application;

[0038] FIG7 is a schematic structural diagram of an exemplary door panel assembly provided in some implementations of the present application;

[0039] FIG8 is a schematic structural diagram of another example door panel assembly provided by some implementations of the present application;

[0040] FIG9 is a partial enlarged view of the spray curing mechanism in FIG4 ;

[0041] FIG10 is a schematic diagram of a partial structure of a spray curing mechanism provided in some implementations of the present application;

[0042] FIG11 is a schematic diagram of the layout of an image collector according to an example provided by some implementations of the present application;

[0043] FIG12 is a schematic structural diagram of an exemplary final curing mechanism provided in some implementations of the present application;

[0044] FIG13 is a schematic structural diagram of another exemplary lithium battery insulation layer printing device provided by some implementations of the present application;

[0045] FIG14 is a schematic diagram of the layout between the laser beam and the battery during the laser texturing process provided by some implementations of the present application.

[0046] In the picture:

[0047] 10, loading position; 20, pre-treatment position; 30, image acquisition position; 40, spraying and curing position; 40a, spraying position; 40b, curing position; 50, final curing position; 60, unloading position;

[0048] 100, housing; 100a, first housing; 100b, second housing; 100c, third housing;

[0049] 200, transition housing; 200a, first transition housing; 200b, second transition housing;

[0050] 300, door panel assembly; 301, door panel; 3011, first avoidance groove; 3012, second avoidance groove; 302, drive assembly; 3021, drive motor; 3022, second screw rod; 300a, first left door panel assembly; 300b, first right door panel assembly; 300c, second left door panel assembly; 300d, second right door panel assembly; 300e, third left door panel assembly; 300f, third right door panel assembly;

[0051] 1. Spray curing mechanism; 11. Print head; 111. Print head body; 112. Nozzle; 12. Negative pressure air duct; 121. Negative pressure suction port; 13. First fixing member; 14. Initial curing lamp assembly; 15. Light baffle;

[0052] 2. Final curing mechanism; 21. Final curing lamp assembly; 22. Second fixing member; 23. Linear light-transmitting heat-insulating board;

[0053] 3. Image collector;

[0054] 41. Guide rail; 42. First screw rod;

[0055] 5. Material transporting fixtures;

[0056] 6. Dust removal and exhaust components;

[0057] 7. Product to be printed; 7a. Battery; 71a. Terminal.

[0058] Modes for Carrying Out the Invention

[0059] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may indicate that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may indicate that the first feature is at a lower level than the second feature.

[0061] Figure 1 shows a flow chart of a method for printing an insulating layer of a lithium battery provided by some implementations of the present application. As shown in Figure 1, the present application provides a method for printing an insulating layer of a lithium battery, comprising the following steps:

[0062] S100, parameter preset step: preset the total thickness of the required coating as H0, preset the thickness of the single spray coating as H x ,in, ,m is a positive integer, and m≥2.

[0063] S200, pre-treatment step: roughening the area to be printed on the product to be printed. By roughening the area to be printed, the adhesion of the coating to the area to be printed can be improved. The roughening process can be performed by laser roughening, sandblasting, grinding, and forming during the casting process, without limitation. With respect to the laser roughening process, a laser beam can be used to perform laser roughening on the area to be printed on the product to be printed; after the laser roughening process, the area to be printed on the product to be printed is plasma cleaned to remove organic residues on the surface of the product, ensure the cleanliness of the product surface, and improve the adhesion of the coating.

[0064] S300, image acquisition step: identifying and locating the area to be printed on the product to be printed. The image acquisition device can be used to identify and locate the area to be printed on the product to be printed.

[0065] S400, printing step: spraying and curing the product to be printed m times, with each spraying and curing of the product to be printed sequentially performing one spraying operation and one curing operation. This method for printing the insulating layer of a lithium battery achieves a desired coating thickness while ensuring a good curing effect, improving the adhesion of the coating to the product to be printed, and reducing the probability of the coating falling off the product to be printed.

[0066] It is understood that the method for printing an insulating layer on a lithium battery can be used for printing an insulating layer or a protective layer such as an anti-oxidation layer. As long as the printing principle is to spray and then solidify the coating, the method for printing an insulating layer on a lithium battery provided in this application can be used. Furthermore, the product to be printed can be a battery or other product, without limitation.

[0067] In step S400, n spraying and curing positions are set, where n is a positive integer and n≥1. The spraying and curing positions include spraying positions and curing positions that are arranged in sequence along the set direction; when n=1, the product to be printed moves back and forth m times between the spraying position and the curing position of the spraying and curing position along the set direction, wherein the product to be printed is sprayed once each time it passes through the spraying position, and the paint on the product to be printed is cured once each time it passes through the curing position; when n≥2, all spraying and curing positions are arranged in sequence along the set direction, and when n≥m, the product to be printed passes through m spraying and curing positions in sequence along the set direction, wherein the product to be printed is sprayed and cured once each time it passes through a spraying and curing position; when n<m, the product to be printed moves back and forth between the spraying position and the curing position of the spraying and curing position along the set direction, so that the product to be printed is sprayed and cured m times. The following is an explanation with a specific example, as follows:

[0068] Figure 2 shows a schematic diagram of multiple reciprocating spraying and curing of a product to be printed, as provided by some implementations of the present application. As shown in Figure 2, the printing step includes the following steps: setting a spraying and curing station 40, which includes a spraying station 40a and a curing station 40b spaced apart along a set direction; and moving the product to be printed 7 back and forth n times between the spraying station 40a and the curing station 40b of the spraying and curing station 40 along the set direction. Each time the product to be printed 7 passes through the spraying station 40a, it is sprayed once, and each time the paint on the product to be printed 7 passes through the curing station 40b, the paint is cured once.

[0069] Continuing with FIG. 2 , the printing process further includes setting a loading position 10 and a unloading position 60. The loading position 10 is located upstream of the spraying and curing position 40 in a set direction, and the unloading position 60 is located downstream of the spraying and curing position 40 in a set direction. The product 7 to be printed is loaded at the loading position 10, then moved in a set direction to the spraying and curing position 40. After moving back and forth between the spraying position 40a and the curing position 40b of the spraying and curing position 40 n times, the product is unloaded from the unloading position 60.

[0070] Continuing with FIG. 2 , when the coating on the product 7 to be printed is initially cured at the curing position 40 b, the product 7 to be printed further includes a final curing step before being unloaded: a final curing position 50 is set, located downstream of the spray curing position 40 in a set direction. After the product 7 to be printed undergoes n spray curing cycles, the coating on the product 7 to be printed is finally cured at the final curing position 50, and the product 7 to be printed is unloaded from the unloading position 60. Furthermore, during the final curing of the coating on the product 7 to be printed, the product 7 to be printed is cooled and insulated to prevent overheating and ensure stable product performance.

[0071] Figure 3 shows a schematic diagram of multiple spraying and curing steps of a product 7 to be printed, as provided in some implementations of the present application. As shown in Figure 3 in conjunction with Figure 2 , the printing step includes the following steps: setting n spraying and curing stations 40, where n ≥ 2, and the n spraying and curing stations 40 are sequentially arranged along a set direction, each spraying and curing station 40 including a spraying station 40a and a curing station 40b spaced apart along the set direction; and the product 7 to be printed passes through the n spraying and curing stations 40 in sequence along the set direction, wherein the product 7 to be printed is sprayed and cured once each time it passes through a spraying and curing station 40.

[0072] Continuing with FIG. 3 , the printing process further includes setting a loading position 10 and a discharge position 60. The loading position 10 is located upstream of all spraying and curing positions 40 in the set direction, while the discharge position 60 is located downstream of all spraying and curing positions 40 in the set direction. The product 7 to be printed is loaded at the loading position 10, then moves unidirectionally in the set direction, passing through n spraying and curing positions 40 in sequence, before being discharged from the discharge position 60.

[0073] Continuing with FIG. 3 , when the coating on the product 7 to be printed is initially cured at the curing position 40 b, the product 7 to be printed further includes a final curing step before being unloaded: a final curing position 50 is set, located downstream of all spray curing positions 40 in a set direction. After the product 7 to be printed undergoes n spray curing cycles, the coating on the product 7 to be printed is finally cured at the final curing position 50, and the product 7 to be printed is unloaded from the unloading position 60. Furthermore, during the final curing of the coating on the product 7 to be printed, the product 7 to be printed is cooled and insulated to prevent overheating and ensure stable product performance.

[0074] It can be understood that when the number of spray curing positions 40 is two or more, the product to be printed 7 can move unidirectionally along the set direction. At this time, multiple products to be printed 7 can be loaded and printed in sequence, which can improve product processing capacity.

[0075] In order to implement the lithium battery insulation layer printing method, the present application also provides a lithium battery insulation layer printing device, which can realize a single spraying of a small amount of coating and curing, and then repeat the spraying and curing multiple times to achieve the required coating thickness while ensuring the curing effect, improving the adhesion of the coating on the product to be printed 7, and reducing the probability of the coating falling off the product to be printed 7.

[0076] FIG4 shows a schematic structural diagram of an example of a lithium battery insulation layer printing device provided by some implementations of the present application. FIG5 shows a schematic structural diagram of another example of a lithium battery insulation layer printing device provided by some implementations of the present application. FIG6 shows a schematic structural diagram of yet another example of a lithium battery insulation layer printing device provided by some implementations of the present application. As shown in FIG4 to FIG6, the present application provides a lithium battery insulation layer printing device, comprising a spraying and curing station 40, a spraying and curing mechanism 1, and a material transport jig 5, wherein the number of the spraying and curing stations 40 is the same as that of the spraying and curing mechanism 1 and is arranged in a one-to-one correspondence, the number of the two being one or n, n being a positive integer, and n≥2, one or n spraying and curing stations 40 being arranged in sequence along a set direction, each spraying and curing station 40 comprising a spraying station 40a and a curing station 40b arranged in sequence along the set direction, the spraying and curing mechanism 1 comprising a print head 11 and a curing lamp assembly, the print head 11 being configured to spray paint, and the curing lamp assembly being configured to cure the paint on the product 7 to be printed. The material transport jig 5 is configured to carry the product 7 to be printed and to move back and forth or unidirectionally in a set direction. When there is only one spraying and curing station 40, the material transport jig 5 carries the product 7 to be printed and moves back and forth multiple times between the spraying station 40a and the curing station 40b in the set direction, so that a single spraying and curing mechanism 1 sprays and cures the product 7 to be printed twice or more. When there are n spraying and curing stations 40, the material transport jig 5 carries the product 7 to be printed and moves unidirectionally in the set direction, sequentially passing through n spraying and curing stations 40, so that n spraying and curing mechanisms 1 spray and cure the product 7 to be printed twice or more.

[0077] It can be understood that the spray curing position 40 and the spray curing mechanism 1 in the lithium battery insulation layer printing equipment are not limited to one, two, or three as shown in Figures 4 to 6, but can also be any number of four, five, six, seven, etc., and can be specifically designed according to the required production capacity and the size of the factory space. No further examples will be given here.

[0078] The curing light assembly can include a primary curing light assembly, in which case the lithium battery insulation layer printing device includes a final curing mechanism located downstream of the spray curing mechanism 1. The curing light assembly can also include both a primary curing light assembly and a final curing light assembly, in which case no final curing mechanism is required. The curing light assembly can also include a final curing light assembly, in which case no final curing mechanism is required. The main difference between these three scenarios is whether the coating on the product to be printed 7 is formed by multiple spraying applications followed by primary curing and then final curing, or by multiple spraying applications followed by primary curing and final curing, or by multiple spraying applications followed by final curing.

[0079] In the first case, referring to Figures 4 to 6 , the curing lamp assembly includes a primary curing lamp assembly 14. In this case, the lithium battery insulation layer printing apparatus should also include a final curing station 50 and a final curing mechanism 2 corresponding to the final curing station 50. The final curing mechanism 2 includes a final curing lamp assembly 21, which is configured to perform a final curing of the insulating coating formed by the initial curing. The intensity of the curing light emitted by the final curing lamp assembly 21 is greater than the intensity of the curing light emitted by the primary curing lamp assembly 14. After the product 7 to be printed is sprayed, the primary curing lamp assembly 14 performs a primary curing to prevent the coating from flowing freely but does not form a stable coating. After multiple spraying cycles of primary curing, the final curing lamp assembly 21 performs a final curing to form a stable coating. It can be understood that when the number of spraying and curing positions 40 is two or more, the product to be printed 7 is first sprayed for the first time, and then initially cured; then sprayed for the second time, and then initially cured; then sprayed for the third time, and then initially cured; and so on, the spraying and initial curing steps are repeated until the thickness of the coating meets the requirements; and then final curing is performed to ensure that the coating forms a coating with strong adhesion, excellent quality and stable structure.

[0080] For the second scenario, the curing lamp assembly includes both a primary curing lamp assembly 14 and a final curing lamp assembly 21, which are spaced apart along a set direction. In this case, the lithium battery insulation layer printing device no longer includes a final curing mechanism 2. In this case, during the printing process, after the first spraying, the product to be printed 7 undergoes a primary curing step, followed by a final curing step, to form a first insulating layer. These spraying, primary curing, and final curing steps are repeated until the coating thickness meets the requirements. This lithium battery insulation layer printing method can improve the adhesion and quality of the coating. It is understood that, for the second scenario only, the product to be printed 7 can also undergo repeated primary curing steps multiple times, followed by a final curing step, to form the desired coating. In this case, the main difference between the second scenario and the first scenario is that the final curing lamp assembly 21 is external and independent of the spraying and curing mechanism 1, or it can be built into the spraying and curing mechanism 1.

[0081] In the third case, the curing lamp assembly includes a final curing lamp assembly 21. In this case, the lithium battery insulation layer printing device no longer includes a final curing mechanism 2. In this case, during the printing process, the product to be printed 7 is directly final cured after the first spraying to form a first insulating layer; this spraying and final curing step is repeated until the coating thickness meets the requirements. This lithium battery insulation layer printing method can improve the adhesion and quality of the coating. It is understandable that because the final curing is performed directly after spraying in the third case, while in the second case, the initial curing is performed before the final curing after spraying, the amount of coating sprayed in a single spray in the third case needs to be less than the amount of coating sprayed in a single spray in the second case to ensure the adhesion of the coating and the molding quality.

[0082] It can be understood that when the coating is an insulating layer, the coating can be an insulating coating, which is an insulating coating that can be converted from liquid to solid under the irradiation of curing light, wherein the curing light is usually ultraviolet light, and both the initial curing lamp assembly 14 and the final curing lamp assembly 21 can emit ultraviolet light.

[0083] In one embodiment, as shown in FIG3 , the lithium battery insulation layer printing equipment further includes a loading station 10 and a unloading station 60. The loading station 10 is located upstream of all spraying and curing stations 40 in a set direction, and the unloading station 60 is located downstream of all spraying and curing stations 40 in a set direction, to facilitate loading and unloading of the product 7 to be printed. Loading can be performed by a worker or a loading device at the loading station 10, and unloading can be performed by a worker or a unloading device at the unloading station 60.

[0084] In one embodiment, the lithium battery insulation layer printing device further includes an image acquisition station 30 and an image collector 3 corresponding to the image acquisition station 30. The image acquisition station 30 is located downstream of the material loading station 10. The image collector 3 is configured to identify and locate the to-be-printed area of ​​the to-be-printed product 7 located at the image acquisition station 30. For example, the image collector 3 may be a charge coupled device (CCD) camera.

[0085] In one embodiment, the lithium battery insulation layer printing device further includes a pre-processing station 20 and a pre-processing device corresponding to the pre-processing station 20. The pre-processing station 20 is located upstream of the image acquisition station 30. The pre-processing device is configured to perform a roughening process on the to-be-printed area of ​​the product 7 to be printed. For example, the pre-processing device can be a laser generator.

[0086] In other embodiments, the lithium battery insulation layer printing equipment may not include the preprocessing position 20 and the preprocessing equipment. The product to be printed 7 can be preprocessed in other equipment, and then the preprocessed product to be printed can be loaded at the loading position 10.

[0087] In one embodiment, the lithium battery insulation layer printing device also includes a driving mechanism, which includes a driver (not shown in the figure) and a guide rail 41. The guide rail 41 extends along a set direction, and the driver is configured to drive the material transport fixture 5 to move back and forth or unidirectionally along the guide rail 41 to achieve back and forth movement or unidirectional movement of the product 7 to be printed along the set direction.

[0088] In one embodiment, referring to Figures 4 and 5, a loading position 10 (see Figure 3), a pre-treatment position 20, an image acquisition position 30, two spray curing positions 40, a final curing position 50, and a unloading position 60 (see Figure 3) are sequentially arranged on the guide rail 41 along a set direction. The driver drives the material transport jig 5 to move along the guide rail 41. When the material transport jig 5 moves to the loading position 10, a worker or a loading device places the product to be printed 7 on the material transport jig 5; the driver drives the material transport jig 5 to move along the guide rail 41 to the pre-treatment position 20. The pre-treatment device roughens the area to be printed on the product to be printed 7; the driver drives the material transport jig 5 to move along the guide rail 41 to the image acquisition position 30. The image acquisition device 30 identifies and locates the area to be printed of the product to be printed 7 at the image acquisition position 30; the driver drives the material transport jig 5 to move along the guide rail 41 to the first spray curing position 4 0, the first spraying and curing mechanism 1 sprays and initially cures the area to be printed of the product 7 to be printed; the driver drives the material transport jig 5 to move along the guide rail 41 to the second spraying and curing position 40, and the second spraying and curing mechanism 1 sprays and initially cures the area to be printed of the product 7 to be printed; the driver drives the material transport jig 5 to move along the guide rail 41 to the final curing position 50, and the final curing mechanism 2 performs final curing on the paint on the product 7 to be printed; the driver drives the material transport jig 5 to move along the guide rail 41 to the unloading position 60, and the worker or unloading equipment takes away the product 7 to be printed on which the coating is completed on the material transport jig 5.

[0089] In another embodiment, referring to Figures 4 and 6, a loading position 10 (see Figure 3), a pre-treatment position 20 (see Figure 5), an image acquisition position 30, three spraying and curing positions 40, a final curing position 50, and a unloading position 60 (see Figure 3) are sequentially arranged on the guide rail 41 along a set direction. It is understandable that the station arrangement on the guide rail 41 is not limited to the above examples. For example, the number of spraying and curing positions 40 can also be one, four, five, six, seven, or any other number. In addition, when the number of spraying and curing positions 40 is the same as the number of spraying times required to meet the required coating thickness, the number of material transport jigs 5 is multiple, and the driver can simultaneously drive multiple material transport jigs 5 to move, each material transport jig 5 carrying a product 7 to be printed. In this way, each station can have a material transport jig 5, and multiple products 7 to be printed can be printed simultaneously to increase production capacity.

[0090] Continuing to refer to Figures 4 to 6, the lithium battery insulation layer printing equipment also includes a shell 100 and a transition shell 200. The shell 100 is configured to cover the outside of the work station (such as the image acquisition position 30, the spray curing position 40, and the final curing position 50). The shell 100 has an entrance for the material transport jig 5 to enter and an exit for the material transport jig 5 to exit; the two adjacent shells 100 are transitionally connected through the transition shell 200. The transition shell 200 has a transition entrance for the material transport jig 5 to enter and a transition exit for the material transport jig 5 to exit. Through the cooperation of the shell 100 and the transition shell 200, it can be ensured that the material transport jig 5 is always in a closed or semi-closed space, which is not only convenient for controlling dust in the working area to ensure the coating quality, but also can avoid paint spillage and improve the working environment of the workers. In the working space of spray curing station 40, dust must be strictly controlled to ensure that the cleanliness level reaches International Organization for Standardization class 7 (ISO class 7) or above (refer to ISO14644-1 international standard - classification of air cleanliness levels) to prevent dust particles from affecting the coating quality.

[0091] In addition, the lithium battery insulation layer printing equipment includes a door panel assembly 300. The entrance of the shell 100 is provided with a door panel assembly 300, and the door panel assembly 300 is configured to open or close the entrance of the shell 100; the exit of the shell 100 is provided with a door panel assembly 300, and the door panel assembly 300 is configured to open or close the exit of the shell 100, so as to implement full sealing measures for a specific shell 100 as needed.

[0092] In one embodiment, the lithium battery insulation layer printing equipment further includes a dust removal and exhaust assembly 6. Both the housing 100 and the transition housing 200 are provided with exhaust vents, each equipped with a dust removal and exhaust assembly 6 to remove dust from the housing 100 and the transition housing 200, thereby improving the working environment of the workspace formed by the housing 100 and the transition housing 200 and enhancing the spraying quality. The dust removal and exhaust assembly 6 can be an exhaust fan, which exhausts dust and fugitive paint from the interior of the housing 100 and the transition housing 200 to the exterior of the housing 100 and the transition housing 200, and then discharges them outside the factory after purification.

[0093] Taking the lithium battery insulation layer printing device shown in Figure 4 as an example, the arrangement of the shell 100, the transition shell 200 and the door panel assembly 300 is explained. Since the lithium battery insulation layer printing device includes an image acquisition position 30, a spray curing position 40 and a final curing position 50 arranged in sequence along a set direction, the number of shells 100 is three, the number of transition shells 200 is two, and the number of door panel assemblies 300 is six. For the convenience of description, the shell covered by the image acquisition position 30 is recorded as the first shell 100a, the door panel assembly 300 at the entrance of the first shell 100a is recorded as the first left door panel assembly 300a, and the door panel assembly 300 at the exit of the first shell 100a is recorded as the first right door panel assembly 300b; the shell 100 covered by the spray curing position 40 is recorded as the second shell 100b, the door panel assembly 300 at the entrance of the second shell 100b is recorded as the second left door panel assembly 300c, and the door panel assembly 300 at the exit of the second shell 100b is recorded as the second right door panel assembly 300b. Right door panel assembly 300d; the shell 100 covered at the final curing position 50 is recorded as the third shell 100c, the door panel assembly 300 at the entrance of the third shell 100c is recorded as the third left door panel assembly 300e, and the door panel assembly 300 at the exit of the third shell 100c is recorded as the third right door panel assembly 300f; the transition shell 200 connecting the first shell 100a and the second shell 100b is recorded as the first transition shell 200a, and the transition shell 200 connecting the second shell 100b and the third shell 100c is recorded as the second transition shell 200b.

[0094] Continuing with Figure 4 , the first housing 100a is positioned outside the image acquisition station 30, the second housing 100b is positioned outside the spray curing station 40, and the third housing 100c is positioned outside the final curing station 50. The transition inlet of the first transition housing 200a is connected to the outlet of the first housing 100a, and the transition outlet of the first transition housing 200a is connected to the inlet of the second housing 100b. The transition inlet of the second transition housing 200b is connected to the outlet of the second housing 100b, and the transition outlet of the second transition housing 200b is connected to the inlet of the third housing 100c. The first left door panel assembly 300a is mounted on the first housing 100a and configured to open or close the inlet of the first housing 100a. The first right door panel assembly 300b is mounted on the first housing 100a and is located between the outlet of the first housing 100a and the transition inlet of the first transition housing 200a. It is configured to open or close the outlet of the first housing 100a, that is, to open or close the connection between the first housing 100a and the first transition housing 200a. The second left door panel assembly 300c is installed on the second shell 100b and is located between the transition outlet of the first transition shell 200a and the entrance of the second shell 100b. It is configured to open or close the entrance of the second shell 100b, that is, it is configured to open or close the communication portion between the first transition shell 200a and the second shell 100b; the second right door panel assembly 300d is installed on the second shell 100b and is located between the outlet of the second shell 100b and the transition entrance of the second transition shell 200a. It is configured to open or close the outlet of the second shell 100b, that is, it is configured to open or close the communication portion between the second shell 100b and the second transition shell 200a. The third left door panel assembly 300e is installed on the third shell 100c and is located between the transition outlet of the second transition shell 200b and the entrance of the third shell 100c. It is configured to open or close the entrance of the third shell 100c, that is, it is configured to open or close the connecting part between the second transition shell 200b and the third shell 100c; the third right door panel assembly 300f is installed on the third shell 100c and is configured to open or close the outlet of the third shell 100c.

[0095] The lithium battery insulation layer printing equipment can ensure that the material transport jig 5 carrying the product to be printed 7 is always in a closed or semi-closed space through the arrangement of the first shell 100a, the first transition shell 200a, the second shell 100b, the second transition shell 200b and the third shell 100c; then, by arranging a door panel assembly 300 at the entrance and exit of the shell 100, the entrance and / or exit of the shell 100 is opened or closed by the door panel assembly 300, so that the entire printing process operation can be carried out in a closed or semi-closed space, reducing the influence of external environmental factors (such as dust, fan blowing, etc.) on the spraying quality, and preventing the odor of the paint from overflowing into the external environment, which is conducive to improving the working environment.

[0096] FIG7 is a schematic structural diagram of an exemplary door panel assembly 300 provided in some implementations of the present application. As shown in FIG7 in conjunction with FIG4 , the door panel assembly 300 includes a door panel 301 and a drive assembly 302 . The drive assembly 302 is configured to drive the door panel 301 upward and downward so that the door panel 301 has an open position that opens the entrance or exit of the housing 100 and a closed position that closes the entrance or exit of the housing 100 . It can be understood that when the door panel 100 is in the closed position, the door panel 301 in the first left door panel assembly 300a can block the entrance of the first shell 100a; the door panel 301 in the first right door panel assembly 300b can simultaneously block the exit of the first shell 100a and the transition entrance of the first transition shell 200a; similarly, the door panel 301 in the second left door panel assembly 300c can simultaneously block the entrance of the second shell 100b and the exit of the first transition shell 200a, and the door panel 301 in the second right door panel assembly 300d can simultaneously block the exit of the second shell 100b and the entrance of the second transition shell 200b; similarly, the door panel 301 in the third left door panel assembly 300e can simultaneously block the entrance of the third shell 100c and the exit of the second transition shell 200b, and the door panel 301 in the third right door panel assembly 300f can block the exit of the third shell 100c.

[0097] Furthermore, since the guide rail 41 sequentially passes through the first housing 100a, the first transition housing 200a, the second housing 100b, the second transition housing 200b, and the third housing 100c along a predetermined direction, when the door panel 301 is in the closed position, the door panel 301 should be able to avoid the guide rail 41 to prevent collision between the door panel 301 and the guide rail 41. To this end, a first avoidance groove 3011 is defined at the lower end of the door panel 301 to avoid collision between the door panel 301 and the guide rail 41. When the door panel 301 is in the closed position, the guide rail 41 can be accommodated in the first avoidance groove 3011, thereby preventing collision between the door panel 301 and the guide rail 41 and ensuring that the door panel 301 can better close the entrance or exit of the housing 100.

[0098] Continuing with FIG7 , the drive mechanism further includes a first screw rod 42, which is spaced apart and parallel to the guide rail 41. The material transport jig 5 is in transmission engagement with the first screw rod 42. The driver drives the first screw rod 42 to rotate, causing the material transport jig 5 to move along the first screw rod 42. At this point, the lower end of the door panel 301 also has a second avoidance groove 3012 that avoids the first screw rod 42. When the door panel 301 is in the closed position, the first screw rod 42 can be accommodated in the second avoidance groove 3012, thereby preventing the door panel 301 from colliding with the first screw rod 42 and ensuring that the door panel 301 can better close the entrance or exit of the housing 100. In other embodiments, the driver can also drive the material transport jig 5 to move along the guide rail 41 through other transmission mechanisms, such as a rack and pinion transmission mechanism, in which the rack is spaced apart and parallel to the guide rail 41, and the material transport jig 5 is provided with a gear. The driver drives the gear to rotate, thereby causing the material transport jig 5 to move relative to the rack. At this time, the second avoidance groove 3012 at the lower end of the door panel 301 can be configured to avoid the rack. It is understandable that, for different transmission mechanisms, the lower end of the door panel 301 can be provided with avoidance grooves of different shapes, as long as they can prevent the door panel 31 from colliding with the transmission mechanism and ensure that the door panel 301 can close the entrance or exit of the housing 100. Detailed examples are not given here.

[0099] Continuing with FIG7 , there are two drive assemblies 302 , one on each side of the door panel 301. The lower ends of the door panel 301 each have connectors connected to the output terminals of the drive assemblies 302 . The two drive assemblies 302 simultaneously drive the door panel 301 up and down, not only enabling the door panel 301 to be adjusted to an open or closed position as needed, but also ensuring stable lifting and lowering of the door panel 301, thereby improving the safety of the device. In one embodiment, the drive assemblies 302 include a drive motor 3021 and a second screw rod 3022 . The door panel 301 and the second screw rod 3022 are in transmission engagement with each other, with the drive motor 3021 driving the second screw rod 3022 to rotate, thereby raising and lowering the door panel 301. In other embodiments, the drive assemblies 302 may further include a drive motor, a sprocket, and a chain. The door panel 301 is secured to the chain, and the sprocket and chain cooperate to drive the sprocket to rotate, thereby driving the chain to raise and lower the door panel 301. It is understandable that the driving component 302 is not limited to the above two examples. Any driving device that can drive the door panel 301 to move up and down is acceptable and is not limited here.

[0100] FIG8 shows a schematic structural diagram of another example of a door panel assembly 300 provided by some implementations of the present application. As shown in FIG8 in combination with FIG4 , the door panel assembly 300 includes a door panel 301 and a drive assembly 302. The drive assembly 302 is configured to drive the door panel 301 to move up and down so that the door panel 301 has an open position for opening the entrance or exit of the shell 100 and a closed position for closing the entrance or exit of the shell 100. The main difference between the door panel assembly 300 in this example and the door panel assembly 300 in the previous example is that the connection position between the door panel 301 and the drive assembly 302 is different, and the matching method between the door panel 301 and the shell 100 is different. Specifically as follows:

[0101] The upper end of the door panel 301 has a connection portion connected to the output end of the drive assembly 302. Two drive assemblies 302 are located on both sides of the door panel 301, and the two drive assemblies 302 simultaneously drive the door panel 301 to rise and fall, so that the door panel 301 opens or closes the entrance or exit of the housing 100.

[0102] In addition, the outer wall of the door panel 301 slides with the entrance or exit of the shell 100, and the entrance or exit of the shell 100 forms a guide groove, and the door panel 301 slides with the guide groove, thereby ensuring that the door panel 301 can be stably raised and lowered in the height direction, thereby ensuring the stability of the door panel 301.

[0103] FIG9 shows a partial enlarged view of the spray curing mechanism 1 in FIG4 . FIG10 shows a partial structural schematic diagram of the spray curing mechanism 1 provided by some implementations of the present application. As shown in FIG9 and FIG10 , the spray curing mechanism 1 further includes a light shielding plate 15. The light shielding plate 15 is located between the print head 11 and the primary curing lamp assembly 14. The print head 11 includes a print head body 111 and a nozzle 112 mounted at the lower end of the print head body 111. The light shielding plate 15 is configured to shield the curing light irradiated to the nozzle 112 of the print head 11. As long as the projection of the light shielding plate 15 in the direction of the nozzle 112 of the print head 11 fully covers the nozzle 112, the curing light irradiated to the nozzle 112 can be shielded. A light shield 15 is provided between the print head 11 and the initial curing lamp assembly 14. When the initial curing lamp assembly 14 is turned on, the light shield 15 blocks the curing light from being irradiated onto the nozzle 112 of the print head 11, thereby preventing the residual paint on the nozzle 112 from curing and clogging the nozzle 112 under the influence of the curing light, thereby ensuring the normal operation of the print head 11, thereby ensuring the quality of subsequent coating formation, and helping to extend the service life of the lithium battery insulation layer printing equipment.

[0104] The spray-curing mechanism 1 also includes a first mounting member 13. The print head 11, the initial curing lamp assembly 14, and the light shield 15 are all suspended above the guide rail 41 via the first mounting member 13. The initial curing lamp assembly 14 emits curing light downward to initially cure the coating on the product 7 to be printed. In this configuration, the lowest nozzle 112 in the print head 11 and the light output position of the initial curing lamp assembly 14 are both positioned below the bottom of the light shield 15. This shields the curing light from the nozzle 112, preventing the liquid outlet of the nozzle 112 from becoming clogged or otherwise affecting the coating quality.

[0105] The length of the area to be printed in the set direction is L1. The distance from the downstream side of the nozzle 112 closest to the light barrier 15 in the print head 11 to the upstream side of the primary curing lamp assembly 14 closest to the light barrier 15 is L2, where L2 = L1. In this embodiment, the product 7 to be printed is a battery, and the area to be printed on the battery is the battery casing. The length of the battery casing in the set direction is L1. The length of the area to be printed is equal to the length of the battery casing. The distance from the nozzle 112 closest to the light barrier 15 to the side of the primary curing lamp assembly 14 closest to the light barrier 15 is L2, where L2 = L1. The print head immediately sprays the material when the battery casing passes directly under the nozzle 112. The coating of the battery casing is completed when the battery casing moves directly below the side of the primary curing lamp assembly 14 closest to the light barrier 15. If L2 is less than L1, the battery casing will be in a state of simultaneous spraying and initial curing. In this case, the curing light from the initial curing lamp assembly 14 can easily cause the paint sprayed from the nozzle 112 to prematurely aggregate and solidify into particles, affecting the coating quality. If L2 is greater than L1, the battery casing will not be directly under the initial curing lamp assembly 14 after spraying is completed, affecting processing efficiency.

[0106] Light baffle 15 can be made of an aluminum alloy or stainless steel. Aluminum alloy or stainless steel light baffle 15 not only has good structural strength but also resists degradation under the influence of ultraviolet light. In practice, a light-blocking layer can be applied to the outer surface of the aluminum alloy or stainless steel plate to prevent light reflection from the light baffle 15. In practice, light baffle 15 can also be made of plastic or wood. There is no specific limitation on the type of light baffle 15; any light-blocking material can be used.

[0107] In one embodiment, the number of nozzles 112 is multiple, and multiple nozzles 112 are installed on the print head body 111. By setting multiple nozzles 112, the spraying range of a single spray can be increased, thereby improving the spraying efficiency. The multiple nozzles 112 can be arranged on the print head body 111 in a straight line along a set direction, or the multiple nozzles 112 can be arranged in a matrix along a set direction on the print head body 111. As long as the spraying efficiency and spraying uniformity can be improved, there is no limitation here. In addition, the print head body 111 has a main control board and valves configured to control the nozzles 112 to spray paint.

[0108] The spray curing mechanism 1 also includes a waste discharge pipe (not shown in the figure) and a plurality of negative pressure air ducts 12 connected to the waste discharge pipe. The waste discharge pipe is arranged outside the housing 100, and the plurality of negative pressure air ducts 12 are arranged inside the housing 100. The plurality of negative pressure air ducts 12 are spaced around the printing head 11. Each negative pressure air duct 12 is fixed to the first fixing member 13. One end of the negative pressure air duct 12 protrudes from the lower side of the first fixing member 13. A negative pressure suction port 121 is provided at the portion of the negative pressure air duct 12 protruding from the lower side of the first fixing member 13. Under the action of negative pressure, the negative pressure suction port 121 sucks the paint droplets within the spraying range of the spraying position 40a and the dust outside the spraying range of the spraying position 40a into the negative pressure air duct 12 (the arrows in Figure 10 indicate the flow direction of the droplets and dust), and discharges the paint droplets to the waste treatment device through the waste discharge pipe to prevent the droplets from affecting the appearance of the coating.

[0109] The lithium battery insulation layer printing equipment also includes a main control mechanism (not shown), which is communicatively connected to the drive mechanism, image acquisition device 3, print head 11, initial curing lamp assembly 14, and final curing lamp assembly 21. Data information for workstations such as the loading position 10, spray curing position 40, final curing position 50, and unloading position 40 is set within the main control mechanism's system. This allows the main control mechanism to control the drive mechanism to automatically move the material transport jig 5. The image acquisition device 3 can identify and locate the printing area of ​​the product 7 to be printed and transmit this information to the main control mechanism. Based on this information, the main control mechanism controls the print head 11 to spray the coating onto the printing area. When the material transport jig 5 moves to the spraying position 40a of the spraying and curing position 40, the main control mechanism controls the nozzle 112 to spray the paint through the main control board of the print head body 111; when the material transport jig 5 moves to the curing position 40b of the spraying and curing position 40, the main control mechanism controls the initial curing lamp assembly 14 to start and perform preliminary curing of the paint; when the material transport jig 5 moves to the final curing position 50, the main control mechanism controls the final curing lamp assembly 21 to start and perform final curing of the paint after the initial curing.

[0110] The main control mechanism includes a first control unit and a second control unit communicatively connected to the first control unit. The first control unit is communicatively connected to the image collector 3. The first control unit can draw a printing model for the received printing information and transmit it to the second control unit. The second control unit is communicatively connected to the print head 11. The second control unit can automatically establish a printing task according to the printing model. The second control unit is communicatively connected to the print head body 111. The print head body 111 has a control board. The injection of multiple nozzles 112 is controlled by the control board. The second control unit can automatically assign the printing task to the control board according to the printing model. The control board controls the multiple nozzles 112 to spray paint according to the received printing task.

[0111] Figure 11 shows a schematic diagram of the layout of an example image collector 3 provided in some implementations of the present application. As shown in Figure 11, there are three image collectors 3, one of which is located above the product 7 to be printed, and the other two are symmetrically located on the left and right sides of the product 7 to be printed. The three image collectors 3 can accurately capture the coordinate information of the to-be-printed area of ​​the product 7 to be printed.

[0112] The difference between the height position of the product 7 to be printed when it is in the image acquisition position 30 and its height position when it is in the spraying position 40a is no greater than 0.5 mm; and the difference between the position of the product 7 to be printed in the vertical direction when it is in the image acquisition position 30 and its position in the vertical direction when it is in the spraying position 40a is no greater than 0.5 mm. The error between the height and horizontal coordinate data of the product 7 to be printed in the image acquisition position 30 and the height and horizontal coordinate data of the product 7 to be printed in the spraying position 40a is no greater than 0.5 mm. This ensures that the error between the positioning information of the to-be-printed area of ​​the product 7 to be printed obtained at the image acquisition position 30 and the positioning information of the to-be-printed area obtained at the spraying position 40a is small, ensuring that the paint can be accurately sprayed into the to-be-printed area.

[0113] Guide rails 41 are linear guides, and the transport jig 5 transports the product at a set speed, ensuring a tolerance of no more than 0.5 mm. In one embodiment, the transport jig 5 moves at a speed of less than or equal to 10 m / min. If the transport jig 5 moves too fast (i.e., if the product 7 to be printed is moved too fast), the coating may form droplets on the outer surface of the product 7 to be printed, resulting in a poor coating appearance.

[0114] Figure 12 illustrates a schematic structural diagram of an exemplary final-curing mechanism 2 provided in some implementations of the present application. As shown in Figure 12 , the final-curing mechanism 2 further includes a second fixing member 22, through which a final-curing lamp assembly 21 is mounted within the housing 100. When there are three final-curing lamp assemblies 21, one final-curing lamp assembly 21 is positioned above the material transport jig 5 via the second fixing member 22, while the remaining two final-curing lamp assemblies 21 are positioned on either side of the material transport jig 5 perpendicular to the set direction, thereby avoiding blind curing zones and improving the coating curing effect.

[0115] In one embodiment, the final-curing lamp assembly 21 located on top of the transport jig 5 is referred to as the first final-curing lamp assembly, and the final-curing lamp assemblies 21 located on both sides of the transport jig 5 are referred to as the second final-curing lamp assembly. During final curing of the coating, the second final-curing lamp assembly needs to be moved closer to the product 7 to ensure a complete final curing of the coating. To this end, the final-curing mechanism 2 also includes a final-curing drive assembly (not shown). The final-curing drive assembly is mounted on the third housing 100c or on the ground. The final-curing drive assembly is configured to drive the second final-curing lamp assembly to move closer to or further away from the product 7. In actual operation, when final curing of the coating on the product 7 is required, the final-curing drive assembly moves the second final-curing lamp assembly closer to the product 7. After the final curing operation is complete, the final-curing drive assembly moves the second final-curing lamp assembly away from the product 7, allowing the transport jig 5 to carry the product 7 along the guide rails 41 and preventing interference between the transport jig 5 or the product 7 and the second final-curing lamp assembly. It is understood that the final curing drive assembly can be a linear drive, such as a linear motor, a pneumatic cylinder, a hydraulic cylinder, an electric push rod, etc. The linear drive drives the second final curing lamp assembly to move in a horizontal direction perpendicular to a set direction, so as to move the second final curing lamp assembly closer to or farther away from the product to be printed 7. The final curing drive assembly can also be a rotary drive that can drive the second final curing lamp assembly to rotate about a vertical direction, so as to move the second final curing lamp assembly closer to or farther away from the product to be printed 7.

[0116] It is understood that the luminous intensity of the final-curing lamp assembly 21 is greater than that of the initial-curing lamp assembly 14. Therefore, the final-curing lamp assembly 21 generates a greater amount of heat during operation. Prolonged use can cause the temperature of the product 7 to overheat. When the product 7 to be printed contains electronic components, cooling and insulation are necessary during the final curing operation to prevent damage to the electronic components. When the product 7 to be printed is a battery, excessively high temperatures can easily damage components such as the battery terminals and explosion-proof valves. Therefore, cooling and insulation measures are required on the battery's exterior during the final curing of the coating.

[0117] The final curing mechanism 2 also includes a cooling and heat-insulating component having an insulating layer. This insulating layer is configured to block or slow the transfer of heat generated by the final curing lamp assembly 21 to the product 7 to be printed. It is understood that the cooling and heat-insulating component may include a linear light-transmitting insulation board, which forms the insulating layer; or the cooling and heat-insulating component may include an air knife assembly, where the airflow from the air knife assembly forms the insulating layer; or the cooling and heat-insulating component may include both a linear light-transmitting insulation board and an air knife assembly.

[0118] For the first scenario, the cooling and heat-insulating component includes a linear light-transmitting heat-insulating plate 23, which is positioned on the side of the final-curing lamp assembly 21 facing the area to be printed. Curing light can pass through the linear light-transmitting heat-insulating plate 23 and irradiate the coating without changing the wavelength of the curing light. The linear light-transmitting heat-insulating plate 23 can be a quartz plate, i.e., a quartz light-transmitting heat-insulating plate. When the product 7 to be printed is a battery, the linear light-transmitting heat-insulating plate 23 can absorb the heat emitted by the final-curing lamp assembly 21 and prevent high temperatures from damaging the battery terminals and internal components. For example, as shown in FIG12 , when there are three final-curing lamp assemblies 21, each final-curing lamp assembly 21 is provided with a linear light-transmitting heat-insulating plate 23 on the side facing the area to be printed.

[0119] For the second scenario, the cooling and heat-insulating component includes an air knife assembly located between the final-curing lamp assembly 21 and the product 7 to be printed. The air knife assembly's projection on the surface of the product 7 is spaced from the printing area. The air knife assembly is configured to generate an airflow that intersects the line connecting the final-curing lamp assembly 21 and the product 7 to be printed. This airflow can block or mitigate the heat transferred from the final-curing lamp assembly 21 to the product 7 to be printed. Furthermore, the air knife assembly can also produce a cooling airflow, which exchanges heat with the hot airflow to enhance the cooling and heat-insulating effect. For example, if there are three final-curing lamp assemblies 21, there are at least three air knife assemblies, with each final-curing lamp assembly 21 having an airflow between it and the printing area. This airflow blocks the heat generated by the final-curing lamp assembly 21 from being transferred to the product 7 to be printed.

[0120] For the third case, the cooling insulation component includes both a linear transparent insulation board 23 and a wind knife assembly. The setting method of the linear transparent insulation board 23 can refer to the setting method of the linear transparent insulation board 23 in the first case, and the setting method of the wind knife assembly can refer to the setting method of the wind knife assembly in the second case, which will not be repeated here.

[0121] In summary, the present application further provides a final curing mechanism 2, which includes a final curing lamp assembly 21 and a cooling and heat-insulating component. Both the final curing lamp assembly 21 and the cooling and heat-insulating component are installed within a third housing 100c. The cooling and heat-insulating component can be a linear light-transmitting heat-insulating plate 23, an air knife assembly, or a combination of the linear light-transmitting heat-insulating plate 23 and the air knife assembly.

[0122] Combining the above description of the printing method and equipment for lithium battery insulation layers, let's take the example of printing the insulation layer on the battery casing. Assuming the thickness of the battery casing insulation layer is 60μm, it requires two repeated spraying cycles for initial curing and one final curing cycle to form the insulation layer.

[0123] FIG13 shows a schematic structural diagram of another exemplary device for printing an insulating layer on a lithium battery, provided by some implementations of the present application. As shown in FIG13 , the device comprises a loading station 10, a pre-treatment station 20, an image acquisition station 30, two spray-curing stations 40, a final curing station 50, a discharge station 60, a laser generator (not shown), an image acquisition device 3, two spray-curing mechanisms 1, a final curing mechanism 2, a first housing 100a, two second housings 100b, a third housing 100c, a material transport jig 5, a drive mechanism, and a main control mechanism (not shown). The spray-curing mechanism 1 comprises a print head 11, a light baffle 15, and a primary curing lamp assembly 14; the final curing mechanism 2 comprises a final curing lamp assembly 21 and a linear light-transmitting heat-insulating plate 23; and the drive mechanism comprises a driver and a guide rail 41. The guide rail 41 is provided with at least seven material transport jigs 5, each of which can be placed on a battery 7a. The driver is configured to drive the material transport jigs 5 along the guide rail 41.

[0124] Based on the above lithium battery insulation layer printing device, the present application also provides a lithium battery insulation layer printing method, comprising the following steps:

[0125] In step S1 , the driver drives the transport jig 5 to move along the guide rail 41 . The first transport jig 5 moves to the loading position 10 . The first battery 7 a is placed on the first transport jig 5 manually or by a loading device.

[0126] In step S2, the driver drives the material transport jig 5 to move along the guide rail 41. The first material transport jig 5 moves to the pretreatment position 20, and uses a laser generator to pretreatment the outer surface of the battery shell of the first battery 7a; the second material transport jig 5 moves to the loading position 10, and the second battery is placed on the second material transport jig 5 manually or by loading equipment.

[0127] Step S3, the driver drives the material transport jig 5 to move, the first material transport jig 5 moves to the image acquisition position 30, uses the image collector 3 to identify and locate the coordinate data of the battery shell of the first battery 7a, and transmits the coordinate data to the main control mechanism; the second material transport jig 5 moves to the pretreatment position 20, uses the laser generator to pre-treat the outer surface of the battery shell of the second battery 7a; the third material transport jig 5 moves to the loading position 10, and the third battery 7a is placed on the third material transport jig 5 manually or by loading equipment.

[0128] In step S4, the driver drives the material transport jig 5 to move. The first material transport jig 5 passes through the spraying position 40a (see Figure 4) and the curing position 40b (see Figure 4) of the first spraying and curing position 40 in sequence. The main control mechanism controls the print head 11 to spray the first layer of insulating coating on the battery shell of the first battery 7a, and the initial curing lamp assembly 14 performs initial curing on the first layer of insulating coating on the first battery 7a; the second material transport jig 5 moves to the image acquisition position 30, and uses the image acquisition device 3 to identify and locate the coordinate data of the battery shell of the second battery 7a, and transmits the coordinate data to the main control mechanism; the third material transport jig 5 moves to the pretreatment position 20, and uses the laser generator to pre-treat the outer surface of the battery shell of the third battery 7a; the fourth material transport jig 5 moves to the loading position 10, and the fourth battery 7a is placed on the fourth material transport jig 5 manually or by loading equipment.

[0129] The printing accuracy is 1 inch × 1 inch, and the pixels are not less than 360px × 720px. The positioning error of the area to be printed at the image acquisition position 30 and the spraying position 40a is less than or equal to 0.5mm. The initial curing standard of the insulating coating is: when the battery shell is upright, the insulating coating has no fluidity on the battery shell. In addition, when the insulating coating on the first battery 7a is initially cured, a light baffle 15 is used to block between the printing head 11 and the initial curing lamp assembly 14 to prevent the nozzle 112 of the printing head 11 from being blocked by the residual cured insulating coating.

[0130] Step S5, the driver drives the material transport jig 5 to move, the first material transport jig 5 passes through the spraying position 40a (see Figure 4) and the curing position 40b (see Figure 4) of the second spray curing position 40 in sequence, the main control mechanism controls the print head 11 to spray the second layer of insulating coating on the battery shell of the first battery 7a, and the initial curing lamp assembly 14 performs initial curing on the second layer of insulating coating on the first battery 7a; the second material transport jig 5 passes through the spraying position 40a (see Figure 4) and the curing position 40b (see Figure 4) of the first spray curing position 40 in sequence, and the main control mechanism controls the print head 11 to spray the battery shell of the second battery 7a The first layer of insulating coating is sprayed on the cell shell, and the initial curing lamp assembly 14 performs initial curing on the first layer of insulating coating on the second battery 7a; the third material transport jig 5 moves to the image acquisition position 30, and uses the image collector 3 to identify and locate the coordinate data of the battery shell of the third battery 7a, and transmits the coordinate data to the main control mechanism; the fourth material transport jig 5 moves to the pretreatment position 20, and uses the laser generator to pre-treat the outer surface of the battery shell of the fourth battery 7a; the fifth material transport jig 5 moves to the loading position 10, and the fifth battery 7a is placed on the fifth material transport jig 5 by manual labor or loading equipment.

[0131] Step S6, the driver drives the material transport jig 5 to move, the first material transport jig 5 moves to the final curing position, and the final curing lamp assembly 21 performs final curing on the two layers of initially cured insulating coating of the first battery 7a; the second material transport jig 5 passes through the spraying position 40a and the curing position 40b of the second spray curing position 40 in sequence, and the main control mechanism controls the print head 11 to spray the second layer of insulating coating on the battery shell of the second battery 7a, and the initial curing lamp assembly 14 performs initial curing on the second layer of insulating coating on the second battery 7a; the third material transport jig 5 passes through the spraying position 40a and the curing position 40b of the first spray curing position 40 in sequence, and the main control mechanism controls the print head 11 to spray the second layer of insulating coating on the battery shell of the second battery 7a. The head 11 sprays the first layer of insulating paint on the battery shell of the third battery 7a, and the initial curing lamp assembly 14 performs initial curing on the first layer of insulating paint on the third battery 7a; the fourth material transport jig 5 moves to the image acquisition position 30, and uses the image collector 3 to identify and locate the coordinate data of the battery shell of the fourth battery 7a, and transmits the coordinate data to the main control mechanism; the fifth material transport jig 5 moves to the pretreatment position 20, and uses the laser generator to pre-treat the outer surface of the battery shell of the fifth battery 7a; the sixth material transport jig 5 moves to the loading position 10, and the sixth battery 7a is placed on the sixth material transport jig 5 manually or by loading equipment.

[0132] Step S7, the driver drives the material transport jig 5 to move, the first material transport jig 5 moves to the unloading position 60, and the worker or unloading equipment takes away the first battery 7a; the second material transport jig 5 moves to the final curing position 50, and the final curing lamp assembly 21 performs final curing on the two layers of initially cured insulating coating of the second battery 7a; the third material transport jig 5 passes through the spraying position 40a and the curing position 40b of the second spray curing position 40 in sequence, and the main control mechanism controls the print head 11 to spray the second layer of insulating coating on the battery shell of the third battery 7a, and the initial curing lamp assembly 14 performs initial curing on the second layer of insulating coating on the third battery 7a; the fourth material transport jig 5 passes through the spraying position 40 of the first spray curing position 40 in sequence 40a and curing position 40b, the main control mechanism controls the print head 11 to spray the first layer of insulating paint on the battery shell of the fourth battery 7a, and the initial curing lamp assembly 14 performs initial curing on the first layer of insulating paint on the fourth battery; the fifth material transport jig 5 moves to the image acquisition position 30, uses the image collector 3 to identify and locate the coordinate data of the battery shell of the fifth battery 7a, and transmits the coordinate data to the main control mechanism; the sixth material transport jig 5 moves to the pretreatment position 20, uses the laser generator to pre-treat the outer surface of the battery shell of the sixth battery 7a; the seventh material transport jig 5 moves to the loading position 10, and the seventh battery 7a is placed on the seventh material transport jig 5 manually or by loading equipment.

[0133] When the number of the material transport jigs 5 is seven, the first material transport jig 5 is recovered, and steps S1 to S8 are repeated to complete the printing process of the remaining batteries until the number of batteries meets the requirement.

[0134] When the number of material transport jigs 5 is eight or more, steps S1 to S8 can be directly repeated until the material transport jig 5 needs to be recovered. During this process, it is necessary to ensure that the driver always drives the material transport jig 5 to move along the guide rail 41 to ensure that the process operations of other workstations can proceed normally.

[0135] It is understood that when the thickness of the insulating layer of the battery casing is 100 μm, three spraying and initial curing steps and one final curing step can be repeated sequentially to form the insulating layer. A skilled person can design the number of spraying and initial curing steps for the insulating layer based on the thickness of the insulating layer required for the battery casing and the initial curing requirements, and examples are not provided here.

[0136] Furthermore, for insulating layers that require two or more spray-curing cycles, the number of spray-curing stations 40 in the lithium battery insulating layer printing equipment does not need to be the same as the number of spray-curing cycles. Instead, the material transport jig 5 can be driven to move back and forth between the spraying station 40a and the curing station 40b multiple times to achieve multiple spray-curing cycles. This method of forming the insulating layer can reduce the cost of the lithium battery insulating layer printing equipment and the space requirements of the plant.

[0137] As battery 7a passes through spraying station 40a and curing station 40b, the driver drives material transport jig 5 to move at a set constant speed to ensure uniform movement of battery 7a. This ensures that the area to be printed on battery 7a is evenly coated with insulating coating, thereby improving the quality of the insulation layer. To further improve the quality of the insulation layer, a negative pressure air duct 12 is used to remove droplets around the print head 11 while the insulating coating is being sprayed on the battery, preventing them from affecting the appearance of the insulation layer.

[0138] During the final curing of the initially cured insulation layer, the outer surface of battery 7a is subjected to cooling and heat insulation measures. For example, the cooling and heat insulation measures include using a linear light-transmitting heat insulation board 23 to block the heat generated by the final curing lamp assembly 21 from being transferred to battery 7a. This prevents damage to components such as the battery terminal and explosion-proof valve due to excessive temperatures, and also prevents damage to the electronic components within the battery due to excessive temperatures.

[0139] In one embodiment, pre-treating the battery housing of the battery comprises the following steps:

[0140] Step S10: Use a laser to roughen the outer surface of battery 7a to increase the outer surface roughness of battery 7a, so that the insulating layer is firmly attached to battery 7a. The roughness Ra of the outer surface of battery 7a after the roughening treatment is 1μm-2μm, and the average roughness depth Rz is greater than 8μm.

[0141] Step S20: Plasma cleaning is performed on the outer surface of the battery 7a to remove dust and / or organic matter on the outer surface of the battery 7a and enhance the adhesion between the insulating layer and the battery 7a.

[0142] In step S10, the laser may be a Gaussian laser or a flat-top laser, wherein a Gaussian laser refers to a laser beam whose amplitude distribution of the cross section of the fundamental mode radiation field emitted by the laser resonant cavity complies with a Gaussian function; a flat-top laser refers to a laser beam whose intensity distribution is flat and uniform. In this embodiment, a flat-top laser may be used to roughen the outer surface of the battery casing, and the power of the flat-top laser is controlled to be less than or equal to 1500W. The beam diameter of the flat-top laser is larger than the beam diameter of the Gaussian laser. During operation, the overlap of the shell processed with the flat-top laser is higher, and there are no obvious stripes on the battery casing. The diameter of the Gaussian laser is smaller, and there will be a certain distance between the beams during processing. It is easy for some parts of the battery casing to be etched while others are not etched, thus forming obvious stripes on the battery casing.

[0143] When the shell of battery 7a is large, the shell needs to be textured at least twice, with the overlapping area of ​​each texture treatment less than or equal to 2 mm. When textured, the shell surface temperature rise needs to be controlled to be less than or equal to 80°C.

[0144] FIG14 is a schematic diagram of the layout between the laser beam and the battery during the laser texturing process provided by some implementations of the present application. As shown in FIG14 , when using a laser to texturize the side of battery 7a, it is necessary to protect the pole 71a on the top cover of battery 7a. The protection treatment can be to adjust the irradiation direction of the laser beam, irradiating the laser beam from one side of battery 7a from top to bottom to the side of battery 7a, with the angle between the laser beam and the side of battery 7a being θ. During irradiation, it is necessary to ensure that θ is less than 90° to prevent the laser beam from irradiating pole 71a.

[0145] In another embodiment, the protective treatment may also be to cover the pole 71 a with a protective cover. By covering the pole 71 a, the laser is prevented from irradiating the pole 71 a, thereby preventing the laser from damaging the pole 71 a of the battery 7 a.

[0146] In step S20, when the battery 7a is plasma cleaned, the plasma cleaning time per unit area of ​​the battery 7a is required to be greater than or equal to 0.5s. The plasma cleaning can adopt 13.56MHz, radio frequency plasma cleaning, and its power range is 100W-1250W. After cleaning, the particle diameter on the outer surface of the battery 7a is less than or equal to 100μm.

[0147] In the description herein, it should be understood that terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are intended to facilitate description and simplify operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0148] In the description of this specification, reference to the terms "one embodiment" or "example" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of terms does not necessarily refer to the same embodiment or example.

[0149] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains an independent technical solution. This narrative style of the specification is for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in multiple embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A final curing mechanism, comprising: case; A final curing lamp assembly, which is installed in the housing and is arranged to be spaced apart from the product to be printed, and performs final curing on the insulating coating on the product to be printed; A cooling and heat-insulating component, wherein the cooling and heat-insulating component has a heat-insulating layer, and the heat-insulating layer is arranged to be located between the final curing lamp assembly and the product to be printed, so as to block or delay the heat generated by the final curing lamp assembly from being transferred to the product to be printed.

2. The final curing mechanism according to claim 1, wherein: The cooling and heat-insulating component comprises a linear light-transmitting heat-insulating board, which is installed at one end of the final curing lamp assembly facing the product to be printed, and forms the heat-insulating layer.

3. The final curing mechanism according to claim 2, wherein: The projection of the linear light-transmitting heat-insulating plate on the product to be printed completely covers the product to be printed.

4. The final curing mechanism according to claim 2, wherein: The linear light-transmitting heat-insulating board is a quartz light-transmitting heat-insulating board.

5. The final curing mechanism according to claim 2, wherein: There are multiple final curing lamp assemblies, the first part of which is arranged to be suspended above the product to be printed, and the second part of which is arranged to be located on both sides of the product to be printed, and each of which is provided with the linear light-transmitting heat-insulating board at one end of the final curing lamp assembly facing the product to be printed.

6. The final curing mechanism according to any one of claims 1 to 5, wherein: The cooling and heat-insulating component includes an air knife assembly, which is installed in the shell. The air knife assembly is arranged at intervals between the projection of the air knife assembly on the product to be printed and the area to be printed on the product to be printed. The air knife assembly is configured to generate airflow to form the heat insulation layer to block the heat transferred from the final curing lamp assembly to the product to be printed.

7. A lithium battery insulation layer printing device, comprising a spray curing mechanism and a final curing mechanism as claimed in any one of claims 1 to 6, wherein the spray curing mechanism is located upstream of the final curing mechanism, and the spray curing mechanism is configured to spray and initially cure the product to be printed; The lithium battery insulation layer printing device also includes: A material transport fixture, configured to carry the product to be printed; as well as Spraying positions and curing positions are arranged in sequence and at intervals along a set direction; the product to be printed is sprayed and initially cured at the spraying position and the curing position respectively; the material transport fixture is configured to carry the product to be printed and move between the spraying position and the curing position along the set direction, so that the product to be printed is sprayed and cured twice or more; The final curing mechanism is configured to perform final curing on the product to be printed that has been sprayed and cured twice or more.

8. The lithium battery insulation layer printing device according to claim 7, wherein: The spraying positions and curing positions arranged in sequence and at intervals along the set direction constitute a spraying and curing position; When the number of the spraying and curing positions is one, the material transport fixture is configured to carry the product to be printed and to move back and forth between the spraying position and the curing position along the set direction, so that the product to be printed is sprayed and cured twice or more; When the number of the spraying and curing positions is two or more, all the spraying and curing positions are arranged in sequence along the set direction, and the material transport jig is arranged to carry the product to be printed and move unidirectionally along the set direction to pass through all the spraying and curing positions in sequence, or move back and forth between the spraying position and the curing position along the set direction, so that the product to be printed can be sprayed and cured twice or more.

9. The lithium battery insulation layer printing device according to claim 8, wherein: The number of the spraying and curing mechanisms is the same as the number of the spraying and curing positions and is arranged in one-to-one correspondence. The spraying and curing mechanism includes a print head and a curing light assembly. The print head is configured to spray paint on the product to be printed located at the spraying position, and the curing light assembly is configured to cure the paint on the product to be printed located at the curing position.

10. The lithium battery insulation layer printing device according to claim 8 further includes a driving mechanism, the driving mechanism includes a driver and a guide rail, the guide rail extends along the set direction, and the driver is configured to drive the material transport fixture to move back and forth or unidirectionally along the guide rail.

11. The lithium battery insulation layer printing equipment according to claim 8, further comprising an upper material position and a lower material position, wherein the upper material position is located upstream of all the spraying and curing positions in the set direction, and the lower material position is located downstream of all the spraying and curing positions in the set direction.

12. The lithium battery insulation layer printing device according to claim 8 further includes a final curing position, the final curing mechanism is arranged corresponding to the final curing position, the final curing position is located downstream of all the spray curing positions in the set direction, and the final curing lamp assembly in the final curing mechanism is arranged to final cure the coating on the product to be printed located at the final curing position.

13. The lithium battery insulation layer printing device according to claim 8, wherein: The curing lamp assembly includes a primary curing lamp assembly and a final curing lamp assembly, the luminous intensity of the final curing lamp assembly is greater than the luminous intensity of the primary curing lamp assembly, the primary curing lamp assembly is configured to initially cure the coating on the product to be printed, and the final curing lamp assembly is configured to finally cure the coating on the product to be printed.

14. The lithium battery insulation layer printing device according to claim 9, wherein: The spray curing mechanism further comprises a plurality of negative pressure air ducts arranged circumferentially around the printing head, the lower end of the negative pressure air duct has a negative pressure suction port, and the negative pressure air duct is arranged to be connected to an exhaust fan.

15. The lithium battery insulation layer printing device according to claim 9, wherein: The spray curing mechanism further comprises a light shielding plate, which is located between the printing head and the curing lamp assembly, and is configured to shield the curing light irradiated onto the nozzle of the printing head.

16. The lithium battery insulation layer printing device according to claim 15, wherein: The length of the to-be-printed area of ​​the to-be-printed product in the set direction is L1, and the distance from the downstream side of the nozzle closest to the light baffle in the print head to the upstream side of the curing lamp assembly closest to the light baffle is L2, wherein L2=L1.

17. The lithium battery insulation layer printing device according to claim 8, further comprising an image acquisition position and an image collector corresponding to the image acquisition position, wherein the image collector is configured to identify and locate the to-be-printed area of ​​the to-be-printed product located at the image acquisition position.

18. The lithium battery insulation layer printing device according to claim 17, wherein: Set to at least one of the following: The difference between the height position of the product to be printed when it is in the image acquisition position and the height position of the product to be printed when it is in the spraying position is not greater than 0.5 mm; or The difference between the position of the product to be printed perpendicular to the set direction when it is in the image acquisition position and the position of the product to be printed perpendicular to the set direction when it is in the spraying position is not greater than 0.5 mm.

19. The lithium battery insulation layer printing device according to claim 8, wherein: There are multiple shells, the spray curing mechanism and the corresponding spray curing position are located in one of the shells, the final curing mechanism is located in another shell, and each of the shells has an inlet for the material transport jig to enter and an outlet for the material transport jig to exit.

20. The lithium battery insulation layer printing device according to claim 19, further comprising a door panel assembly, wherein the inlet and the outlet of the shell are both provided with the door panel assembly, and the door panel assembly is configured to open or close the inlet and the outlet of the shell.

21. The lithium battery insulation layer printing device according to claim 19 further includes a transition shell, wherein the transition shell has a transition inlet for the material transport jig to enter and a transition outlet for the material transport jig to exit, and two adjacent shells are connected through the transition shell.

22. The lithium battery insulation layer printing device according to claim 21 further comprises a dust removal and exhaust assembly, the shell and the transition shell are both provided with exhaust ports, and the dust removal and exhaust assembly is provided in each exhaust port.

23. A method for printing an insulating layer of a lithium battery, applied to the insulating layer printing device of a lithium battery according to any one of claims 7 to 22, the method for printing an insulating layer of a lithium battery comprising: Parameter preset steps: preset the total thickness of the required coating as H0, and preset the thickness of the single spray coating as Hx, where: ,m is a positive integer, and m≥2; Printing step: spraying and curing the product to be sprayed m times, and each time the product to be sprayed and cured is sprayed, a spraying operation and a curing operation are sequentially performed on the product to be sprayed.

24. The method for printing the insulating layer of a lithium battery according to claim 23, wherein: The spray curing of the product to be sprayed is performed m times, comprising: Setting n spraying and curing positions, where n is a positive integer and n≥1, and the spraying and curing positions include spraying positions and curing positions that are sequentially spaced along a set direction; When n=1, the product to be printed moves back and forth m times between the spraying position and the curing position of the spraying and curing position along the set direction, wherein the product to be printed is sprayed once each time it passes through the spraying position, and the paint on the product to be printed is cured once each time it passes through the curing position; When n≥2, the n spraying and curing positions are arranged in sequence along the set direction; when n≥m, the product to be printed passes through the m spraying and curing positions in sequence along the set direction, wherein the product to be printed is sprayed and cured once each time it passes through the spraying and curing position; when n<m, the product to be printed moves back and forth between the spraying position and the curing position of the spraying and curing position along the set direction, so that the product to be printed is sprayed and cured m times.

25. The method for printing the insulating layer of a lithium battery according to claim 24, before the printing step, further comprising: Image acquisition step: setting an image acquisition position, identifying the product to be printed located at the image acquisition position and locating the area to be printed on the product to be printed.

26. The method for printing the insulating layer of a lithium battery according to claim 25, wherein: Set to at least one of the following: The difference between the height position of the product to be printed when it is in the image acquisition position and the height position of the product to be printed when it is in the spraying position is not greater than 0.5 mm; or The difference between the position of the product to be printed perpendicular to the set direction when it is in the image acquisition position and the position of the product to be printed perpendicular to the set direction when it is in the spraying position is not greater than 0.5 mm.

27. The method for printing the insulating layer of a lithium battery according to claim 24, wherein: During the movement of the product to be printed, the product to be printed is uniformly transported along a straight line at a set speed.

28. The method for printing the insulating layer of a lithium battery according to claim 24, wherein: When the curing operation in the spray curing is primary curing, the printing step further includes: The coating on the product to be printed is subjected to a final curing operation, wherein the light intensity of the final curing is greater than the light intensity of the initial curing.

29. The method for printing the insulating layer of a lithium battery according to claim 28, further comprising cooling and insulating the product to be printed during the final curing operation.

30. The method for printing the insulating layer of a lithium battery according to claim 24, further comprising removing the paint droplets within the spraying range of the spraying position and the dust outside the spraying range of the spraying position during the spraying process of the product to be printed.

31. The method for printing the insulating layer of a lithium battery according to any one of claims 24 to 30, before the printing step, further comprising: Pre-treatment step: roughening the to-be-printed area of ​​the to-be-printed product.

32. The method for printing the insulating layer of a lithium battery according to claim 31, wherein: The roughening treatment of the to-be-printed area of ​​the to-be-printed product comprises: Performing laser roughening treatment on the to-be-printed area of ​​the to-be-printed product; The pre-processing step also includes: Cleaning treatment: Plasma cleaning is performed on the area to be printed of the product to be printed.

33. The method for printing the insulating layer of a lithium battery according to claim 32, wherein: When the product to be printed is a battery, the method further comprises: during the texturing process, performing a protective treatment on the pole of the battery.

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