Final curing mechanism and lithium battery insulating layer jet printing equipment

Abstract

The utility model discloses a final curing mechanism and lithium battery insulating layer jet printing equipment. The final curing mechanism comprises a shell, a final curing lamp assembly and a heat insulation cooling piece. The final curing lamp assembly is installed in the shell and arranged at an interval with a product to be jet-printed. The cooling and heat insulation part is provided with a heat insulation layer, and the heat insulation layer is located between the final curing lamp assembly and the to-be-jet-printed product and used for blocking or delaying heat generated by the final curing lamp assembly from being transmitted to the to-be-jet-printed product, reducing the influence of the heat generated by the final curing lamp assembly on the to-be-jet-printed product and improving the yield of the to-be-jet-printed product. Wherein the product to be jet-printed can be a battery or other electronic products. According to the lithium battery insulating layer jet printing equipment, by applying the final curing mechanism, when final curing operation is achieved, the influence of heat generated by the final curing lamp assembly on the battery can be reduced, and the yield of the battery is increased.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and particularly relates to a final curing mechanism and a lithium battery insulation layer spraying device. Background Art

[0002] A battery includes a housing and a battery cell sealed inside the housing. An insulation layer is wrapped around the outer surface of the housing, and the insulation layer is used to provide insulation and withstand voltage protection for the housing.

[0003] In the related art, an inkjet printing device is usually used to spray an insulating coating onto the housing and cure the insulating coating to form an insulation layer. The inkjet printing device includes a material handling fixture, an inkjet head, and a curing lamp. The material handling fixture is used to transport the battery to be processed. The inkjet head is used to spray the insulating coating on the housing of the battery on the material handling fixture. The insulating coating is a photo-curable coating. The curing lamp is used to emit ultraviolet light to irradiate the insulating coating on the housing to cure the insulating coating to form an insulation layer. The inkjet head and the curing lamp are spaced apart along a set direction. The material handling fixture moves the battery to be processed directly below the inkjet head. After the inkjet head sprays the insulating coating on the housing, the material handling fixture moves the battery sprayed with the insulating coating directly below the curing lamp, and the insulating coating is cured to form an insulation layer by irradiating the housing with the curing lamp.

[0004] However, when the curing lamp of the inkjet printing device is a final curing lamp, the final curing lamp generates a large amount of heat during operation. If this heat is transferred to the battery, it is likely to damage the components inside the battery, and in severe cases, it may even affect the normal use of the battery, resulting in a low yield rate of the battery.

[0005] Therefore, there is an urgent need for a final curing mechanism and a lithium battery insulation layer spraying device to solve the above problems. Summary of the Invention

[0006] The purpose of the present application is to provide a final curing mechanism and a lithium battery insulation layer spraying device, which can reduce the influence of the heat generated by the final curing lamp on the battery and improve the yield rate of the battery.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, a final curing mechanism is provided, including:

[0009] A housing;

[0010] A final curing lamp assembly, the final curing lamp assembly is installed in the housing and is spaced apart from the product to be sprayed, and the final curing lamp assembly is used to perform final curing on the insulating coating on the product to be sprayed;

[0011] A heat dissipation and insulation component, the heat dissipation and insulation component having a heat insulation layer, the heat insulation layer being located between the final curing lamp assembly and the product to be printed, and being used for blocking or delaying the heat generated by the final curing lamp assembly from being transferred to the product to be printed.

[0012] As an alternative to the final curing mechanism, the heat dissipation and insulation component includes a linear light-transmitting heat insulation plate, the linear light-transmitting heat insulation plate being installed at one end of the final curing lamp assembly facing the product to be printed, and the linear light-transmitting heat insulation plate forming the heat insulation layer.

[0013] As an alternative to the final curing mechanism, the projection of the linear light-transmitting heat insulation plate on the product to be printed completely covers the product to be printed.

[0014] As an alternative to the final curing mechanism, the linear light-transmitting heat insulation plate is a quartz light-transmitting heat insulation plate.

[0015] As an alternative to the final curing mechanism, the number of the final curing lamp assemblies is multiple, some of the final curing lamp assemblies are suspended above the product to be printed, some of the final curing lamp assemblies are located on both sides of the product to be printed, and the linear light-transmitting heat insulation plates are provided at one ends of all the final curing lamp assemblies facing the product to be printed.

[0016] As an alternative to the final curing mechanism, the heat dissipation and insulation component includes an air knife assembly, the air knife assembly being installed in the housing, the projection of the air knife assembly on the product to be printed being spaced apart from the area to be printed on the product to be printed, the air knife assembly being used for generating an air flow to form the heat insulation layer, and the air flow being used for blocking the heat transferred from the final curing lamp assembly to the product to be printed.

[0017] As an alternative to the final curing mechanism, the final curing mechanism further includes a dust removal and exhaust air assembly, the housing being provided with an exhaust port, and the dust removal and exhaust air assembly being provided at the exhaust port.

[0018] As an alternative to the final curing mechanism, the final curing mechanism further includes a door panel assembly, the door panel assembly being provided at both the inlet and the outlet of the housing, and the door panel assembly being used for opening or closing the inlet and the outlet of the housing.

[0019] In a second aspect, a lithium battery insulation layer printing device is provided, including a spraying and curing mechanism and the final curing mechanism as described in any one of the above, the spraying and curing mechanism being located upstream of the final curing mechanism, and the spraying and curing mechanism being used for spraying and preliminarily curing the product to be printed.

[0020] As an alternative solution for the lithium battery insulation layer spraying device, the spraying and curing mechanism includes a printing head, a light shielding plate, and a primary curing lamp assembly arranged in sequence. The light shielding plate is used to block the curing light irradiated onto the nozzle of the printing head.

[0021] The beneficial effects of this application are as follows:

[0022] The final curing mechanism provided by this application includes a housing, a final curing lamp assembly, and a heat insulation and cooling component. The final curing lamp assembly is installed in the housing and is arranged at an interval from the product to be sprayed. The heat insulation and cooling component has a heat insulation layer, which is located between the final curing lamp assembly and the product to be sprayed, and is used to block or delay the heat generated by the final curing lamp assembly from being transferred to the product to be sprayed, reduce the influence of the heat generated by the final curing lamp assembly on the product to be sprayed, and improve the yield rate of the product to be sprayed. Among them, the product to be sprayed can be a battery or other electronic products.

[0023] The lithium battery insulation layer spraying device provided by this application, by applying the above final curing mechanism, when realizing the final curing operation, can reduce the influence of the heat generated by the final curing lamp assembly on the battery and improve the yield rate of the battery. Description of the Drawings

[0024] The following further describes this application in detail according to the drawings and embodiments.

[0025] Figure 1 It is a flowchart of the lithium battery insulation layer spraying method provided by this application;

[0026] Figure 2 It is a schematic diagram of the product to be sprayed being sprayed and cured back and forth multiple times provided by this application;

[0027] Figure 3 It is a schematic diagram of the product to be sprayed being sprayed and cured multiple times in sequence provided by this application;

[0028] Figure 4 It is a schematic structural diagram of a lithium battery insulation layer spraying device according to an example provided by this application;

[0029] Figure 5 It is a schematic structural diagram of another example of the lithium battery insulation layer spraying device provided by this application;

[0030] Figure 6 It is a schematic structural diagram of still another example of the lithium battery insulation layer spraying device provided by this application;

[0031] Figure 7 It is a schematic structural diagram of a door panel assembly according to an example provided by this application;

[0032] Figure 8 It is a schematic structural diagram of another example of the door panel assembly provided by this application;

[0033] Figure 9 is Figure 4 a partial enlarged view of the spraying and curing mechanism in

[0034] Figure 10 a schematic diagram of the partial structure of the spraying and curing mechanism provided by the present application;

[0035] Figure 11 a schematic layout diagram of an example image collector provided by the present application;

[0036] Figure 12 a schematic diagram of the structure of an example final curing mechanism provided by the present application;

[0037] Figure 13 a schematic diagram of the structure of another example lithium battery insulation layer printing device provided by the present application;

[0038] Figure 14 a schematic layout diagram between the laser beam and the battery during the laser texturing process provided by the present application.

[0039] In the figure:

[0040] 10, loading position; 20, pretreatment position; 30, image acquisition position; 40, spraying and curing position; 40a, spraying position; 40b, curing position; 50, final curing position; 60, unloading position;

[0041] 100, housing; 100a, first housing; 100b, second housing; 100c, third housing;

[0042] 200, transition housing; 200a, first transition housing; 200b, second transition housing;

[0043] 300, door panel assembly; 301, door panel; 3011, first avoidance groove; 3012, second avoidance groove; 302, drive assembly; 3021, drive motor; 3022, second lead screw; 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;

[0044] 1, spraying and curing mechanism; 11, printing head; 111, printing 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 shielding plate;

[0045] 2, final curing mechanism; 21, final curing lamp assembly; 22, second fixing member; 23, linear light-transmitting heat-insulating plate;

[0046] 3, image collector;

[0047] 41. Guide rail; 42. First lead screw;

[0048] 5. Material handling jig;

[0049] 6. Dust removal and exhaust component;

[0050] 7. Product to be spray-printed; 7a. Battery; 71a. Terminal post. Detailed implementation manner

[0051] To make the technical problems solved by this application, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the embodiments of this application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of this application.

[0052] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0053] In this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0054] Figure 1 The flowchart of the lithium battery insulation layer spray-printing method provided by this application is shown. As Figure 1 shown, this application provides a lithium battery insulation layer spray-printing method, including the following steps:

[0055] S100. Parameter presetting step: Preset the total thickness of the required coating as H 0 , and preset the thickness of the paint sprayed each time as H x , where H 0 = m * Hx , where m is a positive integer and m ≥ 2.

[0056] S200, Pretreatment step: Texturize the area to be printed on the product to be printed. By texturizing the area to be printed, the adhesion of the coating on the area to be printed can be improved. Among them, the texturizing treatment can adopt laser texturing process, sandblasting texturing process, grinding texturing process, and texturing process during casting, which is not limited here. For the laser texturing process, a laser beam can be used to texturize the area to be printed on the product to be printed; after the laser texturing treatment, the area to be printed on the product to be printed is subjected to plasma cleaning to remove the organic residue on the product surface, ensure the cleanliness of the product surface, and improve the adhesion of the coating.

[0057] S300, Image acquisition step: Identify and locate the area to be printed on the product to be printed. Among them, an image collector can be used to identify and locate the area to be printed on the product to be printed.

[0058] S400, Printing step: Perform m times of spraying and curing on the product to be printed. Each time the product to be printed is sprayed and cured, a spraying operation and a curing operation are performed on the product to be printed in sequence. This lithium battery insulation layer printing method sprays a small amount of coating and cures it each time, and then repeats 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, and reducing the probability of the coating peeling off from the product to be printed.

[0059] It can be understood that this lithium battery insulation layer printing method can be used for the printing of insulation layers, and can also be used for the printing of protective layers such as anti-oxidation. As long as the printing principle is the coating that is cured after spraying, the lithium battery insulation layer printing method provided in this application can be adopted. In addition, the product to be printed can be a battery or other products, which is not limited here.

[0060] 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 a spraying position and a curing position that are sequentially arranged at intervals along the set direction; when n = 1, the product to be printed travels back and forth m times between the spraying position and the curing position of the spraying and curing position along the set direction. Among them, the product to be printed is sprayed once each time it passes through the spraying position, and the coating on the product to be printed is cured once each time it passes through the curing position; when n ≥ 2, all the spraying and curing positions are arranged in sequence along the set direction. When n ≥ m, the product to be printed passes through each spraying and curing position in sequence along the set direction. Among them, 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 travels back and forth m - n times between the spraying position and the curing position of the spraying and curing position along the set direction. Next, a specific example is used to illustrate as follows:

[0061] Figure 2Shows a schematic diagram of the product to be spray-printed provided by the present application being spray-coated and cured multiple times back and forth. As Figure 2 shown, in the spray-printing step, the following steps are included: Set a spray-coating and curing position 40, which includes a spray-coating position 40a and a curing position 40b that are sequentially arranged at intervals along the set direction; the product 7 to be spray-printed moves back and forth n times between the spray-coating position 40a and the curing position 40b of the spray-coating and curing position 40 along the set direction. Among them, the product 7 to be spray-printed is spray-coated once every time it passes through the spray-coating position 40a, and the coating on the product 7 to be spray-printed is cured once every time it passes through the curing position 40b.

[0062] Continuing as Figure 2 shown, in the spray-printing step, the following steps are further included: Set a loading position 10 and an unloading position 60. The loading position 10 is located upstream of the spray-coating and curing position 40 in the set direction, and the unloading position 60 is located downstream of the spray-coating and curing position 40 in the set direction. The product 7 to be spray-printed is loaded at the loading position 10, then moves to the spray-coating and curing position 40 along the set direction, and after moving back and forth n times between the spray-coating position 40a and the curing position 40b of the spray-coating and curing position 40, it is unloaded from the unloading position 60.

[0063] Continuing as Figure 2 shown, when the curing of the product 7 to be spray-printed at the curing position 40b is the initial curing of the coating, before the product 7 to be spray-printed is unloaded, it further includes: a final curing step: Set a final curing position 50, which is located downstream of the spray-coating and curing position 40 in the set direction. After the product 7 to be spray-printed undergoes n times of spray-coating and curing, the coating on the product 7 to be spray-printed is finally cured at the final curing position 50, and then the product 7 to be spray-printed is unloaded from the unloading position 60. In addition, when the coating of the product 7 to be spray-printed is finally cured, the product 7 to be spray-printed is cooled and heat-insulated to avoid overheating of the product and ensure the stability of the product performance.

[0064] Figure 3 Shows a schematic diagram of the product 7 to be spray-printed provided by the present application undergoing multiple spray-coatings and curings in sequence. As Figure 3 Combined with Figure 2 shown, in the spray-printing step, the following steps are included: Set n spray-coating and curing positions 40, where n≥2, and the spray-coating and curing positions 40 are sequentially arranged along the set direction. Each spray-coating and curing position 40 includes a spray-coating position 40a and a curing position 40b that are sequentially arranged at intervals along the set direction; the product 7 to be spray-printed sequentially passes through each spray-coating and curing position 40 along the set direction. Among them, the product 7 to be spray-printed is spray-coated and cured once every time it passes through a spray-coating and curing position 40.

[0065] Continuing as Figure 3As shown, in the inkjet printing step, the following steps are further included: setting a loading position 10 and an unloading position 60, where the loading position 10 is located upstream of all the spraying and curing positions 40 in the set direction, and the unloading position 60 is located downstream of all the spraying and curing positions 40 in the set direction. The product 7 to be inkjet printed is loaded at the loading position 10, and then moves unidirectionally along the set direction and passes through each spraying and curing position 40 in sequence, and is unloaded from the unloading position 60.

[0066] Continue as Figure 3 As shown, when the curing of the product 7 to be inkjet printed at the curing position 40b is the initial curing of the coating, before the product to be inkjet printed is unloaded, the following steps are further included: a final curing step: setting a final curing position 50, where the final curing position 50 is located downstream of all the spraying and curing positions 40 in the set direction. After the product 7 to be inkjet printed undergoes n times of spraying and curing, the coating on the product 7 to be inkjet printed is finally cured at the final curing position 50, and then the product 7 to be inkjet printed is unloaded from the unloading position 60. In addition, when the coating of the product 7 to be inkjet printed is finally cured, the product 7 to be inkjet printed is cooled and insulated to avoid overheating of the product and ensure the stability of the product performance.

[0067] It can be understood that when the number of the spraying and curing positions 40 is two or more, the product 7 to be inkjet printed can move unidirectionally along the set direction. At this time, multiple products 7 to be inkjet printed can be loaded and inkjet printed in sequence, which can improve the production capacity of product processing.

[0068] To implement the above-mentioned inkjet printing method for the lithium battery insulating layer, the present application also provides an inkjet printing device for the lithium battery insulating layer. This inkjet printing device for the lithium battery insulating layer can achieve single-time spraying of a small amount of coating and curing, and then repeat the spraying and curing multiple times to meet the coating thickness while ensuring the curing effect, improve the adhesion of the coating on the product to be inkjet printed, and reduce the probability of the coating peeling off from the product 7 to be inkjet printed.

[0069] Figure 4 Shows a schematic structural diagram of an inkjet printing device for the lithium battery insulating layer provided by the present application. Figure 5 Shows a schematic structural diagram of another inkjet printing device for the lithium battery insulating layer provided by the present application. Figure 6 Shows a schematic structural diagram of still another inkjet printing device for the lithium battery insulating layer provided by the present application. As Figures 4 to 6As shown in the figure, the present application provides a lithium battery insulation layer spraying and curing device, which includes a spraying and curing position 40, a spraying and curing mechanism 1, and a material handling fixture 5. Among them, the number of the spraying and curing positions 40 is the same as that of the spraying and curing mechanisms 1 and they are arranged in one-to-one correspondence. The number of both is one or n, where n is a positive integer and n≥2. Each spraying and curing position 40 is arranged in sequence along a set direction. Each spraying and curing position 40 includes a spraying position 40a and a curing position 40b that are arranged at intervals in sequence along the set direction. The spraying and curing mechanism 1 includes a printing head 11 and a curing lamp assembly. The printing head 11 is used for spraying the coating material, and the curing lamp assembly is used for curing the coating material on the product 7 to be printed. The material handling fixture 5 is used for carrying the product 7 to be printed and moving back and forth or unidirectionally along the set direction. When the number of the spraying and curing positions 40 is one, the material handling fixture 5 carries the product 7 to be printed and moves back and forth between the spraying position 40a and the curing position 40b along the set direction for multiple times, so that a single spraying and curing mechanism 1 performs spraying and curing on the product 7 to be printed for two or more times. When the number of the spraying and curing positions 40 is n, the material handling fixture 5 carries the product 7 to be printed and moves unidirectionally along the set direction through each spraying and curing position 40 in sequence, so that each spraying and curing mechanism 1 performs spraying and curing on the product 7 to be printed for two or more times.

[0070] It can be understood that the number of the spraying and curing positions 40 and the spraying and curing mechanisms 1 in the lithium battery insulation layer spraying and curing device is not limited to Figures 4 to 6 one, two, or three, but can also be any number such as four, five, six, seven, etc. Specifically, it can be designed according to the required production capacity and the size of the factory building space, and no further examples will be given here.

[0071] It should be noted that the curing lamp assembly can only include an initial curing lamp assembly. In this case, the lithium battery insulation layer spraying and curing device has a final curing mechanism located downstream of the spraying and curing mechanism 1; it can also include both an initial curing lamp assembly and a final curing lamp assembly. In this case, there is no need to additionally set a final curing mechanism; it can also only include a final curing lamp assembly. In this case, there is no need to additionally set a final curing mechanism either. The main difference among the three cases is: whether the coating of the product 7 to be printed is formed by multiple sprays of initial curing followed by final curing, or by multiple sprays of initial curing and final curing, or by multiple sprays of final curing.

[0072] For the first case, refer to Figures 4 to 6, the curing lamp assembly only includes the primary curing lamp assembly 14. At this time, the lithium battery insulation layer printing device should also include a final curing position 50 and a final curing mechanism 2 corresponding to the final curing position 50. The final curing mechanism 2 includes a final curing lamp assembly 21, and the final curing lamp assembly 21 is used to perform final curing on the insulation coating formed by primary curing. Among them, 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, it is first primarily cured by the primary curing lamp assembly 14, so that the coating material cannot flow randomly but a stable coating is not formed. After multiple sprays and primary curings, finally, it is finally cured by the final curing lamp assembly 21 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 7 to be printed is first sprayed for the first time and then primarily cured; then sprayed for the second time and then primarily cured; then sprayed for the third time and then primarily cured; and so on, repeating the spraying and primary curing steps until the thickness of the coating material meets the requirements; finally, it is finally cured to ensure that the coating material forms a coating with strong adhesion, excellent quality, and stable structure.

[0073] For the second case, the curing lamp assembly includes both a primary curing lamp assembly and a final curing lamp assembly, and the primary curing lamp assembly and the final curing lamp assembly are arranged at intervals along a set direction. At this time, the lithium battery insulation layer printing device no longer includes a final curing mechanism. In this case, during the printing process, after the product 7 to be printed is sprayed for the first time, it is first primarily cured and then finally cured to form the first insulating layer; the spraying, primary curing, and final curing steps are repeated until the thickness of the coating meets the requirements. Compared with the existing solution of spraying the required coating material at one time and then performing final curing, this lithium battery insulation layer printing method can improve the adhesion and quality of the coating. It can be understood that only for the second case, the product 7 to be printed can also be repeatedly sprayed and primarily cured multiple times and then finally cured once to form the required coating. At this time, the main difference between the second case and the first case is whether the final curing lamp assembly is external and independent of the spraying and curing mechanism 1 or is built into the spraying and curing mechanism 1.

[0074] For the third case, the curing lamp assembly only includes the final curing lamp assembly. In this case, the lithium battery insulation layer printing device no longer includes the final curing mechanism. In this situation, during the printing process, after the product 7 to be printed is first sprayed, it is directly subjected to final curing to form the first insulating layer; this spraying and final curing step is repeated until the thickness of the coating meets the requirements. Compared with the existing solution of spraying the required coating at one time and then performing final curing, this lithium battery insulation layer printing method can improve the adhesion of the coating and the quality of the coating. It can be understood that since the third case directly performs final curing after spraying, while in the second case, initial curing is performed first and then final curing after spraying, therefore, the amount of coating sprayed each time in the third case needs to be less than that in the second case to ensure the adhesion of the coating and the forming quality.

[0075] It can be understood that when the coating is an insulating layer, the coating material can be an insulating coating material, which is an insulating coating material that can be transformed from a liquid state to a solid state under the irradiation of curing light. Among them, the curing light is usually ultraviolet light, and both the initial curing lamp assembly and the final curing lamp assembly can emit ultraviolet light.

[0076] In one embodiment, as Figure 3 shown, the lithium battery insulation layer printing device further includes a loading position 10 and an unloading position 60. The loading position 10 is located upstream of all the spraying and curing positions 40 in the set direction, and the unloading position 60 is located downstream of all the spraying and curing positions 40 in the set direction to facilitate the loading and unloading of the product 7 to be printed. Among them, when loading, workers or loading equipment can perform loading at the loading position 10, and when unloading, workers or unloading equipment can perform unloading at the unloading position 60.

[0077] In one embodiment, the lithium battery insulation layer printing device further includes an image acquisition position 30 and an image acquisition device 3 corresponding to the image acquisition position 30. The image acquisition position 30 is located downstream of the loading position 10, and the image acquisition device 3 is used to identify and locate the area to be printed of the product 7 to be printed located at the image acquisition position 30. For example, the image acquisition device 3 can be a CCD camera.

[0078] In one embodiment, the lithium battery insulation layer printing device further includes a pretreatment position 20 and a pretreatment device corresponding to the pretreatment position 20. The pretreatment position 20 is located upstream of the image acquisition position 30, and the pretreatment device is used to perform surface roughening treatment on the area to be printed of the product 7 to be printed. For example, the pretreatment device can be a laser generator.

[0079] It should be noted that in other embodiments, the lithium battery insulation layer printing device may not include the pretreatment position 20 and the pretreatment device. The product 7 to be printed can be pretreated in other devices, and then the pretreated product to be printed is loaded at the loading position 10.

[0080] In one embodiment, the lithium battery insulation layer spraying device further includes a driving mechanism. The driving mechanism includes a driver (not shown in the figure) and a guide rail 41. The guide rail 41 extends along a set direction. The driver is used to drive the material handling jig 5 to move back and forth or unidirectionally along the guide rail 41, so as to realize the back and forth or unidirectional movement of the product 7 to be sprayed along the set direction.

[0081] In one embodiment, referring to Figure 5 , a loading position 10 (refer to Figure 3 ), a pretreatment position 20, an image acquisition position 30, two spraying and curing positions 40, a final curing position 50, and an unloading position 60 (refer to Figure 3 ) are sequentially arranged on the guide rail 41 along the set direction. The driver drives the material handling jig 5 to move along the guide rail 41. When the material handling jig 5 moves to the loading position 10, a worker or a loading device places the product 7 to be sprayed on the material handling jig 5. The driver drives the material handling jig 5 to move along the guide rail 41 to the image acquisition position 30, and the image acquisition device 20 identifies and locates the area to be sprayed of the product 7 at the image acquisition position 30. The driver drives the material handling jig 5 to move along the guide rail 41 to the pretreatment position 20, and the pretreatment device performs texturing treatment on the area to be sprayed of the product 7 to be sprayed. The driver drives the material handling jig 5 to move along the guide rail 41 to the first spraying and curing position 40, and the first spraying and curing mechanism 1 performs primary spraying and curing on the area to be sprayed of the product 7 to be sprayed. The driver drives the material handling 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 performs primary spraying and curing on the area to be sprayed of the product 7 to be sprayed. The driver drives the material handling 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 coating on the product 7 to be sprayed. The driver drives the material handling jig 5 to move along the guide rail 41 to the unloading position 60, and a worker or an unloading device takes away the product 7 to be sprayed with the coating completed on the material handling jig 5.

[0082] In another embodiment, referring to Figure 6 , a loading position 10 (refer to Figure 3 ), a pretreatment position 20 (refer to Figure 5 ), an image acquisition position 30, three spraying and curing positions 40, a final curing position 50, and an unloading position 60 (refer to Figure 3 ) are sequentially arranged on the guide rail 41 along the set direction. It can be understood that the station settings on the guide rail 41 are not limited to the above examples. For example, the number of spraying and curing positions 40 can also be any number such as one, four, five, six, seven, etc. 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 thickness of the coating, the number of material handling jigs 5 is multiple. The driver can drive multiple material handling jigs 5 to move simultaneously, and each material handling jig 5 carries a product 7 to be sprayed. In this way, each station can have a material handling jig 5, and multiple products 7 to be sprayed can be sprayed simultaneously to improve production capacity.

[0083] Continue to refer to Figures 4 to 6 , the lithium battery insulation layer spraying equipment further includes a housing 100 and a transition housing 200. The housing 100 is used to cover the outside of the workstations (such as the image acquisition position 30, the spraying and curing position 40, and the final curing position 50). The housing 100 has an entrance for the material handling fixture 5 to enter and an exit for the material handling fixture 5 to exit. The adjacent two housings 100 are connected through the transition housing 200. The transition housing 200 has a transition entrance for the material handling fixture 5 to enter and a transition exit for the material handling fixture 5 to exit. Through the cooperation of the housing 100 and the transition housing 200, it can be ensured that the material handling fixture 5 is always in a closed or semi-closed space, which is not only convenient for dust control in the operation area to ensure the coating quality, but also can prevent paint overflow and improve the working environment of workers. It should be noted that in the operation space of the spraying and curing position 40, dust needs to be strictly controlled to ensure that the cleanliness can reach ISO class 7 (refer to the ISO14644-1 international standard - classification of air cleanliness classes) or above to avoid affecting the coating quality due to dust particles.

[0084] In addition, the lithium battery insulation layer spraying equipment includes a door panel assembly 300. The entrance of the housing 100 is provided with the door panel assembly 300, which is used to open or close the entrance of the housing 100; the exit of the housing 100 is provided with the door panel assembly 300, which is used to open or close the exit of the housing 100, so as to implement a fully enclosed measure for a specific housing 100 as needed.

[0085] In an embodiment, the lithium battery insulation layer spraying equipment further includes a dust removal and exhaust component 6. The housing 100 and the transition housing 200 are both provided with exhaust ports, and each exhaust port is provided with the dust removal and exhaust component 6 to perform dust removal operations on the inside of the housing 100 and the transition housing 200, improve the working environment of the working space formed by the housing 100 and the transition housing 200, and improve the spraying quality. Specifically, the dust removal and exhaust component 6 can be an exhaust fan. The exhaust fan discharges the dust and escaped paint inside the housing 100 and the transition housing 200 to the outside of the housing 100 and the transition housing 200, and discharges them to the outside of the factory building after purification treatment. It should be noted that the dust removal and exhaust component 6 is a relatively mature technology in the prior art, and the working principle and installation details of the dust removal and exhaust component 6 will not be introduced in detail here.

[0086] In order to Figure 4Taking the shown lithium battery insulating layer spraying device as an example, the setting methods of the housing 100, the transition housing 200 and the door panel assembly 300 will be specifically described. Since the lithium battery insulating layer spraying device includes an image acquisition position 30, a spraying and curing position 40 and a final curing position 50 which are sequentially arranged at intervals along a set direction, the number of the housings 100 is three, the number of the transition housings 200 is two, and the number of the door panel assemblies 300 is six. For the convenience of description, the housing covering the image acquisition position 30 is denoted as the first housing 100a, the door panel assembly 300 at the entrance of the first housing 100a is denoted as the first left door panel assembly 300a, and the door panel assembly 300 at the exit of the first housing 100a is denoted as the first right door panel assembly 300b; the housing 100 covering the spraying and curing position 40 is denoted as the second housing 100b, the door panel assembly 300 at the entrance of the second housing 100b is denoted as the second left door panel assembly 300c, and the door panel assembly 300 at the exit of the second housing 100b is denoted as the second right door panel assembly 300d; the housing 100 covering the final curing position 50 is denoted as the third housing 100c, the door panel assembly 300 at the entrance of the third housing 100c is denoted as the third left door panel assembly 300e, and the door panel assembly 300 at the exit of the third housing 100c is denoted as the third right door panel assembly 300f; the transition housing 200 connecting the first housing 100a and the second housing 100b is denoted as the first transition housing 200a, and the transition housing 200 connecting the second housing 100b and the third housing 100c is denoted as the second transition housing 200b.

[0087] Continue to refer to Figure 4, the first housing 100a covers the image acquisition position 30, the second housing 100b covers the spraying and curing position 40, and the third housing 100c covers the final curing position 50. The transition inlet of the first transition housing 200a is connected to the outlet of the first housing 100a, and its transition outlet 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 its transition outlet is connected to the inlet of the third housing 100c. The first left door panel assembly 300a is installed on the first housing 100a for opening or closing the inlet of the first housing 100a; the first right door panel assembly 300b is installed 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 for opening or closing the outlet of the first housing 100a, that is, for opening or closing the communication part between the first housing 100a and the first transition housing 200a. The second left door panel assembly 300c is installed on the second housing 100b and is located between the transition outlet of the first transition housing 200a and the inlet of the second housing 100b for opening or closing the inlet of the second housing 100b, that is, for opening or closing the communication part between the first transition housing 200a and the second housing 100b; the second right door panel assembly 300d is installed on the second housing 100b and is located between the outlet of the second housing 100b and the transition inlet of the second transition housing 200b for opening or closing the outlet of the second housing 100b, that is, for opening or closing the communication part between the second housing 100b and the second transition housing 200b. The third left door panel assembly 300e is installed on the third housing 100c and is located between the transition outlet of the second transition housing 200b and the inlet of the third housing 100c for opening or closing the inlet of the third housing 100c, that is, for opening or closing the communication part between the second transition housing 200b and the third housing 100c; the third right door panel assembly 300f is installed on the third housing 100c for opening or closing the outlet of the third housing 100c.

[0088] Through the settings of the first housing 100a, the first transition housing 200a, the second housing 100b, the second transition housing 200b and the third housing 100c, the lithium battery insulation layer printing device can keep the material handling jig 5 carrying the product to be printed 7 always in a closed or semi-closed space; then by setting the door panel assembly 300 at the inlet and outlet of the housing 100, and opening or closing the inlet and / or outlet of the housing 100 through the door panel assembly 300, the entire printing process operation can be 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 coating from overflowing into the external environment, which is beneficial to improving the working environment.

[0089] Figure 7The structural schematic diagram of a door panel assembly 300 provided by the present application is shown. As Figure 7 Combined with Figure 4 shown, the door panel assembly 300 includes a door panel 301 and a driving assembly 302. The driving assembly 302 is used to drive the door panel 301 to lift, so that the door panel 301 has an open position for opening the entrance or exit of the housing 100 and a closed position for closing 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 housing 100a; the door panel 301 in the first right door panel assembly 300b can block the exit of the first housing 100a and the transition entrance of the first transition housing 200a at the same time; similarly, the door panel 301 in the second left door panel assembly 300c can block the entrance of the second housing 100b and the exit of the first transition housing 200a at the same time, and the door panel 301 in the second right door panel assembly 300d can block the exit of the second housing 100b and the entrance of the second transition housing 200b at the same time; similarly, the door panel 301 in the third left door panel assembly 300e can block the entrance of the third housing 100c and the exit of the second transition housing 200b at the same time, and the door panel 301 in the third right door panel assembly 300f can block the exit of the third housing 100c.

[0090] In addition, since the guide rail 41 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 in sequence along the set 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 the door panel 301 from colliding with the guide rail 41. Based on this, the lower end of the door panel 301 has a first avoidance groove 3011 for avoiding the guide rail 41. When the door panel 301 is in the closed position, the guide rail 41 can be received in the first avoidance groove 3011, which can not only prevent the door panel 301 from colliding with the guide rail 41, but also ensure that the door panel 301 can better close the entrance or exit of the housing 100.

[0091] Continue to refer to Figure 7, the driving mechanism further includes a first lead screw 42. The first lead screw 42 is arranged parallel and spaced from the guide rail 41. The material handling jig 5 is in transmission cooperation with the first lead screw 42. The driver rotates the first lead screw 42 to make the material handling jig 5 move along the first lead screw 42. At this time, the lower end of the door panel 301 further has a second avoidance groove 3012 for avoiding the first lead screw 42. When the door panel 301 is in the closed position, the first lead screw 42 can be accommodated in the second avoidance groove 3012, which can not only prevent the door panel 301 from colliding with the first lead screw 42, but also ensure 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 handling jig 5 to move along the guide rail 41 through other transmission mechanisms, such as a gear-rack transmission mechanism. The rack is arranged parallel and spaced from the guide rail 41, and a gear is arranged on the material handling jig 5. By driving the gear to rotate through the driver, the material handling jig 5 can move relative to the rack. At this time, the second avoidance groove 3012 at the lower end of the door panel 301 can be used to avoid the rack. It can be understood that for different transmission mechanisms, the lower end of the door panel can be provided with avoidance grooves of different shapes, as long as it can prevent the door panel 301 from colliding with the transmission mechanism and ensure that the door panel 301 can close the entrance or exit of the housing 100, and no further examples will be given here.

[0092] Continue to refer to Figure 7 , the number of the driving components 301 is two. The two driving components 301 are respectively arranged on both sides of the door panel 301. The two sides of the lower end of the door panel 301 have connecting parts connected to the output ends of the driving components 301. The two driving components 302 drive the door panel to lift at the same time, which can not only adjust the door panel 301 to the open position or the closed position as needed, but also ensure the stable lifting of the door panel 301 and improve the safety of the equipment. In one embodiment, the driving component 302 includes a driving motor 3021 and a second lead screw 3022. The door panel 301 is in transmission cooperation with the second lead screw 3022. The driving motor 3021 drives the second lead screw 3022 to rotate to make the door panel 301 lift. In other embodiments, the driving component can also include a driving motor, a sprocket and a chain. The door panel is fixed on the chain, and through the cooperation of the sprocket and the chain, and then the driving motor is used to drive the sprocket to rotate to make the chain drive the door panel to lift. It can be understood that the driving component is not limited to the above two examples, as long as it can realize the driving device for driving the door panel to lift, and there is no limitation here.

[0093] Figure 8 shows a schematic structural diagram of a door panel assembly according to another example provided by the present application. As Figure 8 Combined with Figure 4As shown, the door panel assembly 300 includes a door panel 301 and a drive assembly 302. The drive assembly 302 is used to drive the door panel 301 to move up and down, so that the door panel 301 has an open position for opening the inlet or outlet of the housing 100 and a closed position for closing the inlet or outlet of the housing 100. The main differences between the door panel assembly 300 in this example and the door panel assembly 300 in the previous example are as follows: the connection position between the door panel 301 and the drive assembly 302 is different, and the cooperation mode between the door panel 301 and the housing 100 is different. Specifically as follows:

[0094] The upper end of the door panel 301 has a connection part connected to the output end of the drive assembly 302. Two drive assemblies 302 are respectively located on both sides of the door panel. The two drive assemblies 302 drive the door panel to move up and down simultaneously, so that the door panel 301 opens or closes the inlet or outlet of the housing.

[0095] In addition, the outer wall of the door panel 301 is slidably matched with the inlet or outlet of the housing 100. In other words, the inlet or outlet of the housing 100 forms a guide groove, and the door panel 301 is slidably matched with this guide groove, so as to ensure that the door panel 301 can stably move up and down in the height direction and ensure the stability of the door panel.

[0096] Figure 9 Shows Figure 4 A partial enlarged view of the spraying and curing mechanism in. Figure 10 Shows a partial structural schematic diagram of the spraying and curing mechanism provided by the present application. As Figures 9 to 10 shown, the spraying and curing mechanism 1 further includes a light shielding plate 15. The light shielding plate 15 is located between the printing head 11 and the initial curing lamp assembly 14. The printing head 11 includes a printing head body 111 and a nozzle 112 installed at the lower end of the printing head body 111. The light shielding plate 15 is used to block the curing light irradiated on the nozzle 112 of the printing head 11. Specifically, as long as the projection of the light shielding plate 15 in the direction of the nozzle 112 of the printing head 11 completely covers the nozzle 112, the curing light irradiated on the nozzle 112 can be blocked. By arranging the light shielding plate 15 between the printing head 11 and the initial curing lamp assembly 14, when the initial curing lamp assembly 14 is turned on, the light shielding plate 15 blocks the curing light from irradiating on the nozzle 112 of the printing head 11, preventing the paint remaining on the nozzle 112 from curing and blocking the nozzle 112 under the influence of the curing light, ensuring the normal operation of the printing head 11, thereby ensuring the formation quality of the subsequent coating and being beneficial to extending the service life of the lithium battery insulation layer printing equipment.

[0097] The spraying and curing mechanism 1 further includes a first fixing member 13. The printing head 11, the primary curing lamp assembly 14, and the light shielding plate 15 are all suspended above the guide rail 41 through the first fixing member 13. The primary curing lamp assembly 14 emits curing light downward to preliminarily cure the coating on the product 7 to be printed. In this case, as long as the position of the lowest nozzle 112 in the printing head 11 and the light-emitting position of the primary curing lamp assembly 14 are lower than the bottom of the light shielding plate 15, the curing light irradiating the nozzle 112 can be blocked by the light shielding plate 15, avoiding the problems that the liquid outlet end of the nozzle 112 is blocked and unable to work due to the irradiation of the curing light or the coating forming quality is affected.

[0098] The length of the area to be printed in the set direction is L1, and the distance from the downstream side of the nozzle 112 closest to the light shielding plate 15 in the printing head 11 to the upstream side of the primary curing lamp assembly 14 closest to the light shielding plate 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 housing. The length of the battery housing in the set direction is L1. The length of the area to be printed is equal to the length of the battery housing. The distance from the nozzle 112 closest to the light shielding plate 15 to the side of the primary curing lamp assembly 14 close to the light shielding plate 15 is L2, and L2 = L1. When the battery housing passes directly below the nozzle 112, the printing head immediately sprays out the material. When the battery housing just moves to the position directly below the side of the primary curing lamp assembly 14 close to the light shielding plate 15, the spraying of the battery housing is completed. If L2 < L1, the battery housing will be in a state of being sprayed and cured at the same time. In this case, the curing light of the primary curing lamp assembly 14 can easily cause the coating ejected from the nozzle 112 to coagulate and cure in advance to form particles, affecting the forming quality of the coating. If L2 > L1, after the spraying of the battery housing is completed, the battery housing has not yet moved to the position directly below the primary curing lamp assembly 14, affecting the processing efficiency.

[0099] The light shielding plate 15 is preferably made of an aluminum alloy plate or a stainless steel plate. The light shielding plate 15 made of aluminum alloy or stainless steel not only has good structural strength but is also not easily aged under the influence of ultraviolet light. In actual implementation, a light shielding layer can also be coated on the outer surface of the aluminum alloy plate or the stainless steel plate to prevent the light shielding plate 15 from reflecting light. In actual implementation, the light shielding plate 15 can also be set as a plastic plate, a wooden plate, etc. Here, no specific limitation is imposed on the light shielding plate 15, and any plate member that can block light is acceptable.

[0100] In one embodiment, the number of nozzles 112 is multiple, and the multiple nozzles 112 are installed on the print head body 111. By providing the multiple nozzles 112, the spraying range of a single spraying can be increased, thereby improving the spraying efficiency. The multiple nozzles 112 can be arranged at intervals in a straight line along a set direction on the print head body 111, or the multiple nozzles 112 can be arranged in a matrix along the set direction on the print head body 111, as long as the spraying efficiency and spraying uniformity can be improved, and there is no limitation here. In addition, the print head body 111 has a main control board and components such as a valve for controlling the spraying of the coating material by the nozzles 112.

[0101] The spraying and curing mechanism 1 further includes a waste discharge pipe (not shown in the figure) and a plurality of negative pressure air pipes 12 communicated with the waste discharge pipe. The waste discharge pipe is arranged outside the housing 100, and each negative pressure air pipe 12 is arranged inside the housing 100, and the plurality of negative pressure air pipes 12 are spaced around the print head 11. Each negative pressure air pipe 12 is fixed to the first fixing member 13. One end of the negative pressure air pipe 12 protrudes from the lower side surface of the first fixing member 13, and a negative pressure suction port 121 is arranged at the part where the negative pressure air pipe 12 protrudes from the lower side surface of the first fixing member 13. Under the action of negative pressure, the negative pressure suction port 121 sucks the coating droplets within the spraying range at the spraying position 40a and the dust outside the spraying range at the spraying position 40a into the negative pressure air pipe 12 ( Figure 10 the arrows in the figure indicate the flow directions of the droplets and dust), and discharges them to the waste treatment device through the waste discharge pipe, so as to avoid the droplets affecting the appearance of the coating.

[0102] The lithium battery insulation layer printing device further includes a main control mechanism (not shown in the figure), and the main control mechanism is communicatively connected to the driving mechanism, the image collector 3, the print head 11, the initial curing lamp assembly 14, and the final curing lamp assembly 21. By setting the data information of working positions such as the loading position 10, the spraying and curing position 40, the final curing position 50, and the unloading position 40 in the system of the main control mechanism, the main control mechanism can control the driving mechanism to realize the automatic movement of the material handling jig 5. The image collector 3 can identify and locate the printing area of the product 7 to be printed and transmit the information to the main control mechanism, and the main control mechanism can control the print head 11 to spray the coating material onto the printing area according to the obtained information. Specifically, when the material handling jig 5 moves to the spraying position 40a of the spraying and curing position 40, the main control mechanism controls the nozzles 112 to spray the coating material through the main control board of the print head body 111; when the material handling 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 on the coating material; when the material handling 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 on the coating material after preliminary curing.

[0103] 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 based on the received printing information and transmit it to the second control unit. The second control unit is communicatively connected to the printing head. The second control unit can automatically establish a printing task according to the printing model. The second control unit is communicatively connected to the printing head body 111. There is a control board in the printing head body 111. The spraying of each nozzle 112 is controlled by the control board. The second control unit can automatically allocate the printing task to the control board according to the printing model. The control board controls each nozzle 112 to spray the coating according to the received printing task.

[0104] Figure 11 The layout schematic diagram of an exemplary image collector 3 provided by the present application is shown. As Figure 11 shown, the number of the image collectors 3 is three. One of the three image collectors 3 is located above the product 7 to be printed, and the other two are symmetrically arranged on the left and right sides of the product 7 to be printed. The three image collectors 3 can accurately collect the coordinate information of the area to be printed on the product 7 to be printed.

[0105] The difference between the position of the product 7 to be printed in the height direction when it is in the image acquisition position 30 and its position in the height direction when it is in the spraying position 40a is not greater than 0.5 mm; and the difference between the position of the product to be printed in the direction perpendicular to the set direction when it is in the image acquisition position 30 and its position in the direction perpendicular to the set direction when it is in the spraying position 40a is not greater than 0.5 mm. In other words, the error between the coordinate data of the product 7 to be printed in the height direction and the horizontal direction when it is in the image acquisition position 30 and its coordinate data in the height direction and the horizontal direction when it is in the spraying position 40a is not greater than 0.5 mm, which can ensure that the positioning information of the area to be printed obtained by the product 7 to be printed in the image acquisition position 30 has a small error from the positioning information of the area to be printed in the spraying position 40a, and ensure that the coating can be accurately sprayed on the area to be printed.

[0106] A linear guide rail is selected for the guide rail. The material handling jig 5 transports the product at a set speed uniformly to ensure that the error is not greater than 0.5 mm. In an embodiment, the moving speed of the material handling jig 5 is less than or equal to 10 m / min. If the moving speed of the material handling jig 5 is too fast (that is, if the moving speed of the product 7 to be printed is too fast), droplets will appear on the outer surface of the product 7 to be printed during spraying, resulting in poor appearance of the coating.

[0107] Figure 12 The structural schematic diagram of an exemplary final curing mechanism provided by the present application is shown. As Figure 12As shown in the figure, the final curing mechanism 2 further includes a second fixing member 22, and the final curing lamp assembly 21 is installed in the housing 100 through the second fixing member 22. When the number of final curing lamp assemblies 21 is three, one of the final curing lamp assemblies 21 is disposed above the material transporting jig 5 through the second fixing member 22, and the remaining two final curing lamp assemblies 21 are located on both sides of the material transporting jig 5 perpendicular to the set direction, so as to avoid curing blind spots and improve the coating curing effect.

[0108] In an embodiment, the final curing lamp assembly 21 located at the top of the material transporting jig 5 is denoted as the first final curing lamp assembly, and the final curing lamp assemblies 21 located on both sides of the material transporting jig 5 are denoted as the second final curing lamp assemblies. When performing final curing on the coating, it is necessary to move the second final curing lamp assembly to a position close to the product 7 to be spray-printed to ensure the final curing effect of the coating. Based on this, the final curing mechanism 2 further includes a final curing driving assembly (not shown in the figure), and the final curing driving assembly is installed on the third housing or the ground. The final curing driving assembly is used to drive the second final curing lamp assembly to move so that the second final curing lamp assembly approaches or moves away from the product 7 to be spray-printed. In actual work, when it is necessary to perform final curing on the coating on the product 7 to be spray-printed, the final curing driving assembly drives the second final curing lamp assembly to approach the product 7 to be spray-printed. After the final curing operation is completed, the final curing driving assembly drives the second final curing lamp assembly away from the product 7 to be spray-printed, so as to facilitate the material transporting jig 5 to carry the product 7 to be spray-printed along the guide rail 41 and avoid interference between the material transporting jig 5 or the product 7 to be spray-printed and the second final curing lamp assembly. It can be understood that the final curing driving assembly can be a linear driver, such as a linear motor, a cylinder, a hydraulic cylinder, an electric push rod, etc. The linear driver drives the second final curing lamp assembly to move in a horizontal direction perpendicular to the set direction so that the second final curing lamp assembly approaches or moves away from the product 7 to be spray-printed. Of course, the final curing driving assembly can also be a rotary driver, and the rotary driver can drive the second final curing lamp assembly to rotate around the vertical direction so that the second final curing lamp assembly approaches or moves away from the product 7 to be spray-printed.

[0109] It can be 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 heat generated when the final curing lamp assembly 21 works is relatively large. Prolonged use will cause the temperature of the product 7 to be spray-printed to be too high. When the product 7 to be spray-printed is a product with electronic components, in order to avoid damaging the electronic components of the product to be spray-printed due to high temperature, it is necessary to cool and insulate the product 7 to be spray-printed during the final curing operation. When the product 7 to be spray-printed is a battery, too high a temperature is likely to damage components such as the battery terminal posts and explosion-proof valves. When performing final curing on the coating, it is necessary to take cooling and heat insulation measures on the outer surface of the battery.

[0110] The final curing mechanism 2 further includes a heat dissipation and insulation member, which is used to block or slow down the heat transfer from the final curing lamp assembly to the product 7 to be printed. It can be understood that the heat dissipation and insulation member can only include a linear light-transmitting heat insulation plate; or the heat dissipation and insulation member can only include an air knife assembly; or the heat dissipation and insulation member includes both a linear light-transmitting heat insulation plate and an air knife assembly at the same time.

[0111] For the first case, the heat dissipation and insulation member only includes a linear light-transmitting heat insulation plate 23, and the linear light-transmitting heat insulation plate 23 is arranged on the side of the final curing lamp assembly 21 facing the printing area. The curing light can pass through the linear light-transmitting heat insulation plate 23 and irradiate on the coating without changing the wavelength of the curing light. The linear light-transmitting heat insulation plate 23 can be a quartz plate. When the product 7 to be printed is a battery, the linear light-transmitting heat insulation plate 23 can absorb the heat emitted by the final curing lamp assembly 21 and prevent the high temperature from damaging the battery terminal posts and the components inside the battery. For example, as Figure 12 shown, when the number of final curing lamp assemblies 21 is three, a linear light-transmitting heat insulation plate 23 is arranged on the side of each final curing lamp assembly 21 facing the printing area.

[0112] For the second case, the heat dissipation and insulation member only includes an air knife assembly. The air knife assembly is located between the final curing lamp assembly and the product 7 to be printed, and its projection on the surface of the product 7 to be printed is spaced from the printing area. The air knife assembly is used to generate an air flow, and the flow direction of the air flow intersects with the connection line between the final curing lamp assembly 21 and the product to be printed. This air flow can block or slow down the heat transfer from the final curing lamp assembly 21 to the product to be printed. In addition, the air knife assembly can also blow out a cooling air flow, and through the heat exchange between the cooling air flow and the hot air flow, the heat dissipation and insulation effect can be improved. For example, when the number of final curing lamp assemblies is three, the number of air knife assemblies is at least three, and there is an air flow blown out by the air knife assembly between each final curing lamp assembly 21 and the printing area, and the air flow is used to block the heat transfer from the final curing lamp assembly 21 to the product 7 to be printed.

[0113] For the third case, the heat dissipation and insulation member includes both a linear light-transmitting heat insulation plate and an air knife assembly. Among them, the setting method of the linear light-transmitting heat insulation plate can refer to the setting method of the linear light-transmitting heat insulation plate in the first case, and the setting method of the air knife assembly can refer to the setting method of the air knife assembly in the second case, which will not be elaborated here.

[0114] Finally, in combination with the above description of the lithium battery insulation layer printing method and the lithium battery insulation layer printing equipment, taking the example of printing an insulation layer on the battery case of a battery for further explanation. Assume that the thickness of the insulation layer on the battery case is 60μm, and it is necessary to repeat the primary curing by spraying twice and the final curing once to form this insulation layer.

[0115] Figure 13The structural schematic diagram of another example of the lithium battery insulation layer spraying device provided by this application is shown. As Figure 13 shown, the lithium battery insulation layer spraying device includes a loading position 10, a pretreatment position 20, an image acquisition position 30, two spraying and curing positions 40, a final curing position 50, a laser generator (not shown in the figure), an image collector 3, two spraying and curing mechanisms 1, a final curing mechanism 2, a first housing 100a, two second housings 100b, a third housing 100c, a material transporting fixture 5, a driving mechanism, and a main control mechanism (not shown in the figure). The spraying and curing mechanism 1 includes a printing head 11, a light shielding plate 15, and a primary curing lamp assembly 14; the final curing mechanism 2 includes a final curing lamp assembly 21 and a linear light-transmitting heat insulation plate 23; the driving mechanism includes a driver and a guide rail 41. There are at least seven material transporting fixtures 5 provided on the guide rail 41, and each material transporting fixture 5 can place a battery 7a. The driver is used to drive the material transporting fixture 5 to move along the guide rail 41.

[0116] Based on the above lithium battery insulation layer spraying device, this application also provides a lithium battery insulation layer spraying method, including the following steps:

[0117] Step S1: The driver drives the material transporting fixture 5 to move along the guide rail 41. The first material transporting fixture 5 moves to the loading position 10, and the first battery 7a is placed on the first material transporting fixture 5 by manual or loading equipment.

[0118] Step S2: The driver drives the material transporting fixture 5 to move along the guide rail 41. The first material transporting fixture 5 moves to the pretreatment position 20, and the outer surface of the battery case of the first battery 7a is pretreated by using the laser generator; the second material transporting fixture 5 moves to the loading position 10, and the second battery is placed on the second material transporting fixture 5 by manual or loading equipment.

[0119] Step S3: The driver drives the material transporting fixture 5 to move. The first material transporting fixture 5 moves to the image acquisition position 30, and the coordinate data of the battery case of the first battery 7a is identified and located by using the image collector 3, and the coordinate data is transmitted to the main control mechanism; the second material transporting fixture 5 moves to the pretreatment position 20, and the outer surface of the battery case of the second battery 7a is pretreated by using the laser generator; the third material transporting fixture 5 moves to the loading position 10, and the third battery 7a is placed on the third material transporting fixture 5 by manual or loading equipment.

[0120] Step S4: The driver drives the material transporting fixture 5 to move. The first material transporting fixture 5 sequentially passes through the spraying position 40a (see Figure 4 ) and the curing position 40b (see Figure 4) The main control mechanism controls the inkjet head 11 to spray the first layer of insulating coating on the battery case of the first battery 7a, and the preliminary curing lamp assembly 14 performs preliminary curing on the first layer of insulating coating on the first battery 7a; the second material handling jig 5 moves to the image acquisition position 30, and the image collector 3 is used to identify and locate the coordinate data of the battery case of the second battery 7a and transmit the coordinate data to the main control mechanism; the third material handling jig 5 moves to the preprocessing position 20, and the outer surface of the battery case of the third battery 7a is preprocessed by the laser generator; the fourth material handling jig 5 moves to the loading position 10, and the fourth battery 7a is placed on the fourth material handling jig 5 manually or by a loading device.

[0121] Among them, the inkjet printing accuracy is 1 inch × 1 inch, and the pixel is not less than 360px × 720px. The positioning error between the area to be inkjet printed at the image acquisition position 30 and the spraying position is less than or equal to 0.5 mm. The preliminary curing standard of the insulating coating is that when the battery case stands upright, the insulating coating does not have fluidity on the battery case. In addition, when the insulating coating on the first battery 7a is preliminarily cured, a light shield 15 is used to block between the inkjet head 11 and the preliminary curing lamp assembly 14 to prevent the nozzle 112 of the inkjet head 11 from being blocked by the curing of the residual insulating coating.

[0122] Step S5: The driver drives the material handling jig 5 to move. The first material handling jig 5 successively passes through the spraying position 40a (see Figure 4 ) and the curing position 40b (see Figure 4 ) of the second spraying and curing position 40. The main control mechanism controls the inkjet head to spray the second layer of insulating coating on the battery case of the first battery 7a, and the preliminary curing lamp assembly 14 performs preliminary curing on the second layer of insulating coating on the first battery 7a; the second material handling jig 5 successively 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. The main control mechanism controls the inkjet head 11 to spray the first layer of insulating coating on the battery case of the second battery 7a, and the preliminary curing lamp assembly 14 performs preliminary curing on the first layer of insulating coating on the second battery 7a; the third material handling jig 5 moves to the image acquisition position 30, and the image collector 3 is used to identify and locate the coordinate data of the battery case of the third battery 7a and transmit the coordinate data to the main control mechanism; the fourth material handling jig 5 moves to the preprocessing position 20, and the outer surface of the battery case of the fourth battery 7a is preprocessed by the laser generator; the fifth material handling jig 5 moves to the loading position 10, and the fifth battery 7a is placed on the fifth material handling jig 5 manually or by a loading device.

[0123] Step S6: The driver drives the material handling jig 5 to move. The first material handling jig 5 moves to the final curing position. The final curing lamp assembly 21 is used to perform final curing on the two layers of initially cured insulating coatings of the first battery 7a. The second material handling jig 5 sequentially passes through the spraying position 40a and the curing position 40b of the second spraying and curing position 40. The main control mechanism controls the inkjet head 11 to spray the second insulating coating on the battery case of the second battery 7a, and the initial curing lamp assembly 14 performs initial curing on the second insulating coating on the second battery 7a. The third material handling jig 5 sequentially passes through the spraying position 40a and the curing position 40b of the first spraying and curing position 40. The main control mechanism controls the inkjet head 11 to spray the first insulating coating on the battery case of the third battery 7a, and the initial curing lamp assembly 14 performs initial curing on the first insulating coating on the third battery 7a. The fourth material handling jig 5 moves to the image acquisition position 30. The image acquisition device 3 is used to identify and locate the coordinate data of the battery case of the fourth battery 7a and transmit the coordinate data to the main control mechanism. The fifth material handling jig 5 moves to the pretreatment position 20. The laser generator is used to perform surface pretreatment on the battery case of the fifth battery 7a. The sixth material handling jig 5 moves to the loading position 10. The sixth battery 7a is placed on the sixth material handling jig 5 manually or by a loading device.

[0124] Step S7: The driver drives the material handling jig 5 to move. The first material handling jig 5 moves to the unloading position 60. The first battery 7a is taken away by a worker or an unloading device. The second material handling jig 5 moves to the final curing position 50. The final curing lamp assembly 21 is used to perform final curing on the two layers of initially cured insulating coatings of the second battery 7a. The third material handling jig 5 sequentially passes through the spraying position 40a and the curing position 40b of the second spraying and curing position 40. The main control mechanism controls the inkjet head 11 to spray the second insulating coating on the battery case of the third battery 7a, and the initial curing lamp assembly 14 performs initial curing on the second insulating coating on the third battery 7a. The fourth material handling jig 5 sequentially passes through the spraying position 40a and the curing position 40b of the first spraying and curing 40. The main control mechanism controls the inkjet head 11 to spray the first insulating coating on the battery case of the fourth battery 7a, and the initial curing lamp assembly 14 performs initial curing on the first insulating coating on the fourth battery. The fifth material handling jig 5 moves to the image acquisition position 30. The image acquisition device 3 is used to identify and locate the coordinate data of the battery case of the fifth battery 7a and transmit the coordinate data to the main control mechanism. The sixth material handling jig 5 moves to the pretreatment position 20. The laser generator is used to perform surface pretreatment on the battery case of the sixth battery 7a. The seventh material handling jig 5 moves to the loading position 10. The seventh battery 7a is placed on the seventh material handling jig 5 manually or by a loading device.

[0125] When the number of the material handling fixtures 5 is seven, recycle the first material handling fixture 5, and continue to repeat the above steps S1 to S8 to complete the spraying process of the remaining batteries until the number of batteries meets the requirements.

[0126] When the number of the material handling fixtures is eight or more, the above steps S1 to S8 can be directly repeated until the material handling fixtures need to be recycled. During this process, it is necessary to ensure that the driver always drives the material handling fixture 5 to move along the guide rail 41 to ensure that the process operations of other workstations can be carried out normally.

[0127] It can be understood that when the thickness of the insulating layer of the battery case is 100 μm, the spraying and initial curing and the first final curing can be sequentially repeated three times to form the insulating layer. Technicians can design the number of times of spraying and initial curing of the insulating layer according to the required thickness of the insulating layer of the battery case and the initial curing requirements, and no further examples will be given here.

[0128] In addition, for the insulating layer that needs to be formed by spraying and initial curing twice or more, the number of spraying and curing positions 40 in the lithium battery insulating layer printing device does not need to be the same as the number of times of spraying and initial curing. The material handling fixture 5 can be driven to move back and forth between the spraying position 40a and the curing position 40b multiple times to achieve multiple spraying and initial curing. Forming the insulating layer in this way can reduce the cost of the lithium battery insulating layer printing device and the requirements of the lithium battery insulating layer printing device for the factory building space.

[0129] When the battery 7a passes through the spraying position 40a and the curing position 40b of the spraying and curing position 40 in sequence, the driver drives the material handling fixture 5 to move at a set speed uniformly to ensure that the battery 7a moves uniformly, so that the area to be printed of the battery 7a is evenly sprayed with the insulating coating, which can improve the quality of the insulating layer. In order to further improve the quality of the insulating layer, when spraying the insulating coating on the battery, the negative pressure air duct is used to suck away the droplets around the printing head to avoid the droplets affecting the appearance of the insulating layer.

[0130] When performing the final curing on the initially cured insulating layer, heat insulation measures are taken on the outer surface of the battery 7a. For example, the heat insulation measures are: using the linear light-transmitting heat insulation plate 23 to block the heat generated by the final curing lamp assembly 21 from being transmitted to the battery 7a, avoiding damage to components such as the pole posts and explosion-proof valves of the battery 7a due to excessive temperature, and at the same time avoiding damage to the internal electronic components of the battery due to excessive temperature.

[0131] In an embodiment, the pretreatment of the battery case of the battery includes the following steps:

[0132] Step S10: The outer surface of the battery 7a is textured using a laser to increase the surface roughness of the battery 7a, so that the insulating layer adheres firmly to the battery 7a. Among them, the surface roughness Ra of the outer surface of the textured battery 7a is 1 μm - 2 μm, and the average roughness depth Rz > 8 μm.

[0133] Step S20: The outer surface of the battery 7a is subjected to plasma cleaning 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.

[0134] In step S10, the laser can be a Gaussian laser or a flat-top laser. Among them, 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 resonator follows a Gaussian function; a flat-top laser refers to a laser beam with a flat and uniform intensity distribution. It is preferred to use a flat-top laser to texture the outer surface of the battery housing, and the power of the flat-top laser is controlled to be less than or equal to 1500 W. The beam diameter of the flat-top laser is larger than that of the Gaussian laser. When operating, the overlap degree of using the flat-top laser to process the housing is higher, and there are no obvious stripes on the battery housing. The diameter of the Gaussian laser is smaller, and there will be a certain spacing between the beams during processing, and the phenomenon of etching in some parts and non-etching in some parts is likely to occur on the battery housing, so obvious stripes will be formed on the battery housing.

[0135] When the size of the housing of the battery 7a is large, the housing needs to be textured in at least two times, and the overlap area of each texturing process is less than or equal to 2 mm. When texturing the housing, the temperature rise of the housing surface needs to be controlled to be less than or equal to 80 °C.

[0136] Figure 14 This is a schematic layout diagram between the laser beam and the battery during the laser texturing provided by this application. As Figure 14 shown, when using a laser to texture the side surface of the battery 7a, it is necessary to protect the pole 71a on the top cover of the battery 7a. The protection process can be to adjust the irradiation direction of the laser beam, irradiate the laser beam from one side of the battery 7a downward to the side surface of the battery 7a, and the angle between the laser beam and the side surface of the battery 7a is θ. When irradiating, it is necessary to ensure that θ < 90° to prevent the laser beam from irradiating the pole 71a.

[0137] In another embodiment, the protection process can also be to cover the pole 71a with a protective cover. By covering the pole 71a, the laser is prevented from irradiating the pole 71a, thereby preventing the laser from damaging the pole 71a of the battery 7a.

[0138] In step S20, when performing plasma cleaning on the battery 7a, it is required that the plasma cleaning time per unit area of the battery 7a should be greater than or equal to 0.5 s. Plasma cleaning preferably uses 13.56 MHz radio frequency plasma cleaning, and its power range is 100 W - 1250 W. Moreover, the particle diameter on the outer surface of the battery 7a after cleaning is less than or equal to 100 μm.

[0139] In the description of this document, it should be understood that the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to this application. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0140] In the description of this specification, the description referring to terms such as "one embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0141] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0142] The technical principle of this application has been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of this application and cannot be construed as a limitation to the protection scope of this application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation manners of this application without creative efforts, and these manners will all fall within the protection scope of this application.

Claims

1. A final curing mechanism, characterized in that ,include: case; A final curing lamp assembly, which is installed in the housing and spaced apart from the product to be printed, and is used to perform 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, wherein the heat-insulating layer is located between the final curing lamp assembly and the product to be printed, and is used to block or delay the transfer of heat generated by the final curing lamp assembly to the product to be printed.

2. The final curing mechanism according to claim 1, characterized in that: 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, characterized in that: 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, characterized in that: The linear light-transmitting heat-insulating board is a quartz light-transmitting heat-insulating board.

5. The final curing mechanism according to claim 2, characterized in that: There are multiple final curing lamp assemblies, some of which are suspended above the product to be printed, and some of which are located on both sides of the product to be printed. All of the final curing lamp assemblies are provided with the linear light-transmitting heat-insulating board at one end facing the product to be printed.

6. The final curing mechanism according to any one of claims 1 to 5, characterized in that: 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 product to be printed and the to-be-printed area of ​​the product to be printed. The air knife assembly is used to generate airflow to form the heat insulation layer, and the airflow is used to block the heat transferred from the final curing lamp assembly to the product to be printed.

7. The final curing mechanism according to claim 6, characterized in that: The final curing mechanism further comprises a dust removal and exhaust assembly, the shell is provided with an exhaust port, and the dust removal and exhaust assembly is arranged at the exhaust port.

8. The final curing mechanism according to claim 7, characterized in that: The final curing mechanism further comprises a door panel assembly, and the inlet and the outlet of the shell are both provided with the door panel assembly, and the door panel assembly is used to open or close the inlet and the outlet of the shell.

9. A lithium battery insulation layer printing device, characterized in that , including a spray curing mechanism and a final curing mechanism as described in any one of claims 1 to 8, wherein the spray curing mechanism is located upstream of the final curing mechanism, and the spray curing mechanism is used to spray and initially cure the product to be printed.

10. The lithium battery insulation layer printing device according to claim 9, characterized in that: The spray curing mechanism comprises a printing head, a light shielding plate and a primary curing lamp assembly which are arranged in sequence, wherein the light shielding plate is used to shield the curing light irradiated to the nozzle of the printing head.

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