Edge printing method for rectangular lithium battery

Abstract

The invention discloses an edge printing method for a rectangular lithium battery, which comprises a printing module and a clamp, the printing module is used for spraying insulation UV ink, and the clamp is used for placing and transporting the rectangular lithium battery; the printing step comprises the steps that S1, the spraying face of the printing module and the lithium battery of the clamp are arranged in a relative included angle mode; s11, when the spraying face of the printing module is horizontally arranged, the clamp drives the lithium battery and the spraying face to form a relative inclination angle, and the edge and the spraying face form a relative inclination angle; s12, when the lithium battery is conveyed through the first conveying device and is vertically arranged, the spraying face of the printing module is obliquely arranged, and the spraying face and the edge of the lithium battery form a relative inclination angle; and S2, the printing module takes the edge as a printing surface, the preset printing area is calculated, the number of spraying holes of the printing module is calculated, the number and the arrangement mode of the spraying holes are compared with the enlarged printing area, and the two sides of the enlarged large printing area extend to the non-curved-surface positions of the A surface and the B surface.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery processing equipment, and particularly to an edge printing method for rectangular lithium batteries. Background Art

[0002] Lithium batteries are a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. Existing rectangular lithium batteries generally have edges, and the edges can be rounded or chamfered to improve the structural support of the lithium battery.

[0003] Generally, the two sides of the existing edge are the A surface and the B surface. The existing method assumes that the edge has a center line. When spraying the A surface, the spraying surface will exceed the center line and extend to the position of the B surface. When spraying the B surface, the spraying surface of the printing module will exceed the center line and extend to the A surface, thereby realizing the spraying of the edge.

[0004] Then, the following problems will exist in this spraying method: 1. The thickness of the insulating layer at the center line position is greater than that of the A surface and the B surface, so there will be lamination at this position, which will lead to the problem of insulating layer stress;

[0005] 2. The thickness of the insulating layer is greater than the predetermined value, which is likely to cause the rupture of the insulating layer;

[0006] 3. Assuming that the A surface and the B surface are sprayed layer by layer to make the thickness of the edge part consistent, then the spraying efficiency will be greatly reduced. Summary of the Invention

[0007] The main object of the present invention is to propose an edge printing method for rectangular lithium batteries, aiming to improve the existing spraying method, thereby avoiding the lamination of the insulating layer at the edge part, resulting in its thickness being greater than the predetermined value, affecting the insulation stability, avoiding the stress damage of the insulating layer, and improving the use safety of the lithium battery.

[0008] To achieve the above object, the present invention proposes an edge printing method for rectangular lithium batteries, including a printing module and a fixture. The printing module is used for spraying insulating UV ink, and the fixture is used for placing and transporting the rectangular lithium battery;

[0009] The printing steps include:

[0010] S1: The spraying surface of the printing module and the lithium battery of the fixture are arranged at a relative angle;

[0011] S11: When the spraying surface of the printing module is horizontally arranged, the fixture drives the lithium battery to form a relative inclination angle with the spraying surface, and makes the edge form a relative inclination angle with the spraying surface;

[0012] S12: When the lithium battery is transported by the first transport device and is vertically arranged, the spraying surface of the printing module is inclined, and the spraying surface and the edge of the lithium battery form a relative inclination angle;

[0013] S2: The printing module takes the edge as the printing surface, calculates a predetermined printing area, and magnifies the printing area to a predetermined magnification with the vision device as the reference;

[0014] And calculate the number of spray holes of the printing module, and compare the number and arrangement of the spray holes with the magnified printing area,

[0015] where both sides of the magnified printing area extend to the non-curved surface positions of surface A and surface B:

[0016] S3: Calculate the running track of the printing module through the printing area. The printing module is provided with a learning and calculation module,

[0017] The learning and calculation module geometrically models the printing area. The position located at the edge is coordinateized according to the R angle and is arranged in a spray hole matrix. When spraying the edge, the spraying density is reduced to meet the requirement that the covering thickness during secondary spraying is less than a predetermined value.

[0018] In the first embodiment, through an adjustable-angle fixture, the battery core is formed with an inclination angle and then printed; through this printing method, the insulating coating on the R-angle edge is separately drawn and does not need to be covered through multiple laminations. In this way, the thickness of the insulating coating at the R-angle edge will be more uniform, improving the performance of the battery;

[0019] At the same time, it also reduces the secondary pollution to surface B when printing surface A, improving the yield of the product; furthermore, it reduces the number of printing times at the R-angle edge, saves the use of the insulating coating, and reduces the production cost;

[0020] In the second embodiment, by rotating the nozzle of the printing module, the nozzle and the R angle of the battery are made tangent. In this case, the developed view of the R-angle edge of the battery is equivalent to a plane relative to the nozzle, and the printing graphic size for making the R angle can be more accurate; at the same time, compared with the first solution, the second solution can print multiple R-angle edges simultaneously, improving the overall printing efficiency.

[0021] Specifically, the learning module can perform discretization processing: divide the continuous area into grid units (based on the spraying accuracy requirements) to generate a grid map. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the first embodiment;

[0023] Figure 2 It is a cross-sectional view of the first embodiment;

[0024] Figure 3 Schematic diagram of the lithium battery fixture for the first embodiment;

[0025] Figure 4 Schematic of the printing module for the first embodiment Figure 1 ;

[0026] Figure 5 Schematic of the printing module for the first embodiment Figure 2 ;

[0027] Figure 6 Schematic diagram of the second embodiment;

[0028] Figure 7 Schematic of the printing module of the second embodiment Figure 1 ;

[0029] Figure 8 Schematic of the printing module of the second embodiment Figure 2 ;

[0030] Figure 9 Schematic of the printing module of the second embodiment Figure 3 ;

[0031] Figure 10 Schematic of the second UV curing module of the second embodiment Figure 1 ;

[0032] Figure 11 Schematic of the second UV curing module of the second embodiment Figure 2 ;

[0033] Figure 12 Schematic of the second fixture of the second embodiment Figure 1 ;

[0034] Figure 13 Schematic of the second fixture of the second embodiment Figure 2 ;

[0035] Figure 14 Schematic diagram of the second picture after the first spraying and the second spraying of the sprayed ink droplets;

[0036] Figure 15 Schematic diagram of the battery.

[0037] In the figure,

[0038] 1 is the first gantry, 11 is the first horizontal moving device, 12 is the first vertical moving device, 13 is the first spraying module,

[0039] 2 is the first fixture, 20 is the base, 21 is the swing seat, 22 is the first support bump, 23 is the first fixed support bump, 24 is the first adjusting support bump,

[0040] 3 is the tilt drive device, 30 is the slider, 31 is the ball screw, 32 is the screw nut, 33 is the linkage crank,

[0041] 4 is the first UV module,

[0042] 51 is the first fixing plate, 52 is the ink blocking plate,

[0043] 6 is the first transportation device, 61 is the linear guide rail, 62 is the linear slider, 63 is the linear ball screw pair,

[0044] 7 is the second fixture, 71 is the base, 72 is the second support bump, 73 is the second fixed support plate, 74 is the second adjustable support bump, 75 is the horizontal drive device,

[0045] 81 is the first horizontal moving device, 82 is the second vertical moving device, 83 is the rotating assembly, 84 is the rotating motor,

[0046] 9 is the second spraying module, 100 is the second UV curing module, 101 is the top curing assembly, 102 is the side curing assembly,

[0047] 200 is the third vertical ball screw pair, 202 is the third linear moving device. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0049] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0050] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, such descriptions of "first" or "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] As Figures 1 to 14 shown, an edge printing method for a rectangular lithium battery includes a printing module and a fixture. The printing module is used for spraying insulating UV ink, and the fixture is used for placing and transporting the rectangular lithium battery.

[0052] The printing steps include:

[0053] S1: The spraying surface of the printing module and the lithium battery of the fixture are arranged at a relative angle.

[0054] S11: When the spraying surface of the printing module is horizontally arranged, the fixture drives the lithium battery to form a relative inclination angle with the spraying surface, and makes the edge form a relative inclination angle with the spraying surface.

[0055] S12: When the lithium battery is transported by the first transport device 6 and is vertically arranged, the spraying surface of the printing module is inclined, and makes the spraying surface and the edge of the lithium battery form a relative inclination angle.

[0056] In actual processing, S11 and S12 can be combined to improve production efficiency.

[0057] S2: The printing module uses the edge as the printing surface, calculates the predetermined printing area, and magnifies the printing area to a predetermined magnification based on the vision device.

[0058] And calculates the number of spray holes of the printing module, and compares the number and arrangement of the spray holes with the magnified printing area.

[0059] Where the two sides of the magnified printing area extend to the non-curved surface positions of surface A and surface B:

[0060] S3: Calculate the running track of the printing module based on the printing area. The printing module is provided with a learning calculation module.

[0061] The learning calculation module geometrically models the printing area, where the position on the edge is coordinateized according to the R angle, and is arranged according to the spray hole matrix. When spraying the edge, the spraying density is reduced to meet the requirement that the covering thickness during secondary spraying is less than the predetermined value.

[0062] In the first embodiment, by means of a fixture with an adjustable angle, the battery cell is formed into an inclination angle and then printing is carried out; through this printing method, the insulating coating on the R-angle edge is separately mapped and does not need to be covered by multiple layers. In this way, the thickness of the insulating coating at the R-angle edge will be more uniform, improving the performance of the battery.

[0063] At the same time, it also reduces the secondary pollution to the B surface when printing the A surface, improving the yield of the product; furthermore, it reduces the number of printing times at the R-angle edge, saves the use of the insulating coating, and reduces the production cost.

[0064] In the second embodiment, by rotating the nozzle of the printing module, the nozzle is tangent to the R-angle of the battery. In this case, the developed view of the R-angle edge of the battery is equivalent to a plane relative to the nozzle, and the printing graphic size for making the R-angle can be more accurate; at the same time, compared with the first solution, the second solution can print multiple R-angle edges simultaneously, improving the overall printing efficiency.

[0065] The specific learning module can be discretized: the continuous area is divided into grid cells (based on the spraying accuracy requirements) to generate a grid map.

[0066] Specifically, the printing module further includes a vision detection device for photographing the edge.

[0067] The edge is provided with a predetermined R-angle. The vision device acquires the position of the edge of the lithium battery. The vision device further includes an operation system, and the operation system acquires the printing area through the predetermined R-angle and the edge position.

[0068] The printing area is magnified by a predetermined magnification factor to obtain a first picture.

[0069] The printing module acquires a second picture with the first spraying data of the number and arrangement of spray holes. The second picture includes the size and area of the insulating ink droplets.

[0070] According to the size and density of the second picture, the number of spraying times and the number of spraying ink droplets required for the first picture are calculated.

[0071] Furthermore, the spraying of the edge is realized, effectively avoiding the problem of repeated spraying of the insulating layer.

[0072] In the actual spraying process, there is a predetermined spacing between adjacent ink droplets under the condition of magnification. Then, in the second spraying, the first spraying position and the second spraying position of the second picture should overlap in the gap, thereby improving the coverage of the insulating layer.

[0073] Specifically, the printing module of S11 includes a first gantry 1, a first lateral moving device 11 distributed along the length direction of the first cross beam of the first gantry 1, a first vertical moving device 12 provided on the first lateral moving device 11, and a first spraying module 13 provided on the first vertical moving device 12.

[0074] The first lateral moving device 11 is used to drive the first spraying module 13 to move laterally.

[0075] The first vertical moving device 12 is used to drive the first spraying module 13 to move vertically.

[0076] Specifically, the tilting drive device 3 is used to adjust the relative tilting angle of the swing seat 21 with the pivot point of the base 20 as the reference point, and the rectangular lithium battery is placed on the swing seat 21.

[0077] Specifically, a plurality of first clamps 2 are provided at intervals on the horizontal plane of the first cross beam. First UV curing modules are provided on both sides of the first spraying module 13, and the first UV curing modules are arranged vertically.

[0078] When the first spraying module 13 sprays insulating ink on the edge of any rectangular lithium battery, the first UV curing modules on both sides are used to irradiate UV light on the rectangular lithium battery with the just-sprayed ink for curing.

[0079] The first spraying module 13 and the first UV curing modules spray and cure in sequence from left to right.

[0080] Then the first spraying module 13 and the first UV curing modules spray and cure in sequence from right to left.

[0081] And stack the first picture and the second picture in a staggered manner.

[0082] In actual insulation layer spraying, the number of spraying times generally exceeds 6 times, thereby ensuring that the insulation layer is not broken down by an external power source, and thus improving the structural stability.

[0083] Specifically, the tilting drive device 3 includes a sliding block 30 slidably mounted on the base 20 and a ball screw 31 for adjusting the sliding block 30. The sliding block 30 is provided with a lead screw nut 32 that cooperates with the ball screw 31.

[0084] The sliding block 30 is provided with a linkage crank 33. One end of the linkage crank 33 is pivotally connected to the sliding block 30, and the other end is pivotally connected to the bottom wall of the swing seat 21, thereby adjusting the relative tilting angle of the swing seat 21, and thus making the edge of the lithium battery face the spraying surface.

[0085] Specifically, a plurality of first support bumps 22 extending upward are provided on the bottom wall of the swing seat 21, a first fixed support bump 23 is provided on the long side of the swing seat 21, and a slidably mounted first adjustment support bump 24 is provided at a position opposite to the first fixed support bump 23;

[0086] On both sides of the first fixed support bump 23, there are first side support bumps. There is a distance between the first adjustment support bump 24 and the edge of the rectangular lithium battery, so that the edge to be sprayed presents a predetermined inclination angle, thereby ensuring the consistency of spraying.

[0087] Specifically, the first fixed support bump 23 is provided on a first fixing plate 51. A ink blocking plate 52 is provided at the upper end of the first fixing plate 51. The upper wall of the rectangular lithium battery is located at the position of the lower wall of the ink blocking plate 52; the first adjustment support bump 24 is provided on an elastic top spring, and the elastic top spring can apply an elastic force towards the first fixing plate 51 to the side wall of the lithium battery, thereby realizing the limit of the rectangular lithium battery. At the same time, it also realizes the shielding of flying ink, thereby realizing the limit of the lithium battery, and its structure is simple and stable.

[0088] Specifically, the first lateral movement device 11 includes a first lateral guide rail, a first lateral slider slidably mounted on the lateral guide rail, and a first lateral lead screw pair for driving the first lateral slider to move;

[0089] The first vertical movement device 12 includes a first vertical guide rail, a first vertical slider slidably mounted on the vertical guide rail, and a first vertical lead screw pair for driving the first vertical slider to move.

[0090] Specifically, the first transportation device 6 of S12 includes a linear guide rail 61, a linear slider 62 slidably mounted on the linear guide rail 61, and a linear lead screw pair 63 for driving the linear slider 62 to reciprocate;

[0091] A second fixture 7 is slidably provided on the linear slider. The second fixture 7 is used to vertically place the rectangular lithium battery and make the two opposite edges of the rectangular lithium battery vertically arranged.

[0092] Specifically, the second fixture 7 includes a base 71, second support bumps 72 extending upward from the bottom arm of the base 71, second fixed support plates 73 provided at both ends of the base 71, and second adjustment support bumps 74 slidably mounted on the fixed support plates.

[0093] The base 71 is provided with a horizontal driving device 75. The horizontal driving device 75 is used to drive the second adjustment support bump 74 to slide and make the opposite side faces of the lithium battery completely exposed, thereby realizing the clamping of the rectangular lithium battery.

[0094] Specifically, first horizontal moving devices 81 are provided on both sides of the linear guide rail 61, a second vertical moving device 82 is provided on the first horizontal moving device 81, and a rotating assembly 83 is provided on the second vertical moving device 82. A second spraying module 9 is provided on the rotating assembly 83, and the rotating assembly 83 is used to drive the second spraying module 9 to rotate.

[0095] Specifically, the first horizontal moving device 81 includes a first horizontal guide rail, a first horizontal slider slidably installed on the first horizontal guide rail, and a first horizontal lead screw pair for driving the first horizontal slider to move;

[0096] The second vertical moving device 82 includes a second vertical guide rail, a second vertical slider slidably installed on the second vertical guide rail, and a second vertical lead screw pair for driving the second vertical slider to move.

[0097] Specifically, the rotating assembly 83 includes two vertically arranged plates spaced apart. Both sides of the second spraying module 9 are pivotally installed between two pivot plates. A rotating motor 84 is provided on the outer wall of one of the pivot plates. After the second spraying module 9 extends out of the vertical plate, it is directly or connected to the rotating motor 84 through a belt, thereby driving the second spraying module 9 to rotate to a vertical setting or an inclined setting.

[0098] Specifically, multiple groups of the second spraying assemblies are provided. The rotating assembly 83 is used to drive the spraying surface of the second spraying module 9 to be vertically arranged or inclined, and is used to spray the edges and / or sides of the lithium battery. Therefore, in actual production capacity adjustment, according to actual needs, the sides of the lithium battery can be sprayed simultaneously, or the edges can be sprayed, or the sides can be sprayed after the edges are sprayed.

[0099] Specifically, a second UV curing module 100 is provided at a position adjacent to the second spraying assembly.

[0100] The second UV curing module 100 includes a second gantry, a top curing component 101 provided at the top of the second gantry, and side curing components 102 provided on both sides of the second gantry.

[0101] During spraying, after the second spraying module 9 sprays the sides and edges of the lithium battery simultaneously, in the next process, the top curing component 101 and the side curing components 102 fix the sides and edges of the lithium battery simultaneously, thereby improving the spraying efficiency.

[0102] Specifically, third vertical guide rails are provided on both sides of the second gantry, third vertical sliders are slidably installed on the third vertical guide rails, and the top curing component 101 is provided on the two third vertical sliders;

[0103] The top wall of the second gantry is provided with a third vertical lead screw pair 200 to directly or simultaneously drive two groups of third vertical sliders through a synchronous belt. In this application, the synchronous belt is adopted to realize the synchronous movement on both sides of the top curing assembly 101, thereby ensuring the stability of curing.

[0104] Specifically, a third linear moving device 202 is suspended inside the second gantry, and the side curing assembly 102 is arranged on the third linear moving device 202.

[0105] Specifically, the second fixture 7 can reciprocate between the second gantry and the second spraying assembly, and switch between the steps of spraying and curing for the side surfaces and edges.

[0106] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for printing edges of rectangular lithium batteries, characterized in that: It includes a printing module and a fixture, wherein the printing module is used to spray insulating UV ink, and the fixture is used to place and transport rectangular lithium batteries; The printing steps include: S1: The spraying surface of the printing module and the lithium battery of the fixture are arranged at a relative angle; S11: When the spraying surface of the printing module is set horizontally, the clamp drives the lithium battery to form a relative inclination angle with the spraying surface, and makes the edge form a relative inclination angle with the spraying surface; S12: When the lithium battery is transported by the first transport device and arranged vertically, the spraying surface of the printing module is arranged at an angle, and the spraying surface and the edge of the lithium battery are at a relative inclination angle; S2: The printing module uses the edge as the printing surface, calculates a predetermined printing area, and enlarges the printing area to a predetermined magnification based on the visual device; And calculate the number of nozzles in the printing module, and compare the number and arrangement of nozzles with the enlarged printing area. The two sides of the enlarged large print area extend to the non-curved positions of the A and B surfaces: S3: Calculate the running track of the printing module through the printing area, wherein the printing module is provided with a learning calculation module, The learning calculation module geometrically models the printing area, wherein the position at the edge is coordinate-based according to the R angle and arranged according to the nozzle matrix, and the density of the spraying is reduced when spraying the edge to ensure that the coverage thickness is less than a predetermined value during the secondary spraying.

2. The method for printing edges of a rectangular lithium battery according to claim 1, characterized in that: The printing module also includes a visual detection device, which is used to photograph edges. The edge is provided with a predetermined R angle, and the visual device obtains the edge position of the lithium battery. The visual device also includes a computing system, and the computing system obtains the printing area through the predetermined R angle and the edge position. The printing area is magnified at a predetermined magnification to obtain a first image; The printing module obtains a second image based on the first spraying data of the number and arrangement of the nozzle holes, wherein the second image includes the size and area of ​​the insulating ink droplets. The number of spraying times and the number of ink droplets sprayed for the first image are calculated according to the size and density of the second image.

3. The method for printing edges of a rectangular lithium battery as claimed in claim 2, characterized in that: The printing module of S11 includes a first gantry, a first lateral moving device distributed along the length direction of a first beam of the first gantry, a first vertical moving device arranged on the first lateral moving device, and a first spraying module arranged on the first vertical moving device. The first lateral moving device is used to drive the first spraying module to move lateral. The first vertical moving device is used to drive the first spraying module to move vertically; The clamp is a first clamp, which includes a base and a swing seat swingably mounted on one end of the base, and the base is provided with a tilting drive device. The tilt driving device is used to make the swing seat adjust the relative tilt angle with the pivot point of the base as the base point, and the rectangular lithium battery is placed on the swing seat.

4. The method for printing edges of a rectangular lithium battery as claimed in claim 3, characterized in that: A plurality of first fixtures are provided at intervals on the horizontal surface of the first crossbeam, and first UV curing modules are provided on both sides of the first spraying module; When the first spraying module sprays insulating ink on the edge of any rectangular lithium battery, the first UV curing modules located on both sides are used to irradiate UV light on the rectangular lithium battery just sprayed with ink to cure it; The first spraying module and the first UV curing module spray and cure in sequence from left to right. Then the first spraying module and the first UV curing module spray and cure in sequence from right to left; and causing the first image and the second image to be staggered and stacked; The tilt driving device comprises a sliding block slidably mounted on the base and a ball screw for adjusting the sliding block, wherein the sliding block is provided with a screw nut matched with the ball screw. The sliding block is provided with a linkage crank, one end of the linkage crank is pivotally connected to the sliding block, and the other end is pivotally connected to the bottom wall of the swing seat.

5. The method for printing edges of a rectangular lithium battery as claimed in claim 3, characterized in that: The first transverse moving device comprises a first transverse guide rail, a first transverse slider slidably mounted on the transverse guide rail, and a first transverse screw rod pair for driving the first transverse slider to move; The first vertical moving device includes a first vertical guide rail, a first vertical slider slidably mounted on the vertical guide rail, and a first vertical screw rod pair for driving the first vertical slider to move.

6. The method for printing edges of a rectangular lithium battery according to claim 1, characterized in that: The first transport device of S12 comprises a linear guide rail, a linear slider slidably mounted on the linear guide rail, and a linear screw pair for driving the linear slider to reciprocate; The linear slide is provided with a second clamp, and the second clamp is used to vertically place the rectangular lithium battery and vertically arrange the two opposite edges of the rectangular lithium battery.

7. The method for printing edges of a rectangular lithium battery according to claim 10, characterized in that: The second fixture includes a base, a second support protrusion extending upward from the bottom arm of the base, a second fixed support plate disposed at both ends of the base, and a second adjustment support protrusion slidably mounted on the fixed support plate. The base is provided with a horizontal driving device, and the horizontal driving device is used to drive the second adjustment support protrusion to slide and make the two opposite side surfaces of the lithium battery completely exposed.

8. The method for printing edges of a rectangular lithium battery according to claim 1, characterized in that: A first horizontal moving device, a second vertical moving device arranged on the first horizontal moving device, and a rotating assembly arranged on the second vertical moving device are arranged on both sides of the linear guide rail, and the rotating assembly is provided with a second spraying module, and the rotating assembly is used to drive the second spraying module to rotate; The first horizontal moving device comprises a first horizontal guide rail, a first horizontal slider slidably mounted on the first horizontal guide rail, and a first horizontal lead screw pair for driving the first horizontal slider to move; The second vertical moving device includes a second vertical guide rail, a second vertical slider slidably mounted on the second vertical guide rail, and a second vertical lead screw pair for driving the second vertical slider to move.

9. The method for printing edges of a rectangular lithium battery according to claim 1, characterized in that: The rotating assembly includes two vertical plates arranged at intervals, and the two sides of the second spray module are pivotally installed between the two pivot plates. The outer wall of one of the pivot plates is provided with a rotating motor. After the second spray module extends out of the vertical plate, it is directly or belt-connected to the rotating motor.

10. The method for printing edges of a rectangular lithium battery according to claim 1, characterized in that: The second spraying assembly is provided with a plurality of groups, and the rotating assembly is used to drive the spraying surface of the second spraying module to be arranged vertically or inclined, and is used to spray the edges and / or sides of the lithium battery; A second UV curing module is provided adjacent to the second spraying assembly. The second UV curing module includes a second gantry, a top curing assembly arranged at the top of the second gantry, and side curing assemblies arranged at both sides of the second gantry. During spraying, after the second spraying module sprays the sides and edges of the lithium battery simultaneously, in the next process, the top curing assembly and the side curing assembly fix the sides and edges of the lithium battery simultaneously.

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