Battery piece printing device, printing screen plate and battery piece preparation equipment

Abstract

The invention relates to the technical field of solar cells, particularly provides a cell printing device, a printing screen and cell preparation equipment, and aims to solve the technical problem of poor alignment effect during manual alignment of a printing screen and a cell in the prior art. In order to achieve the purpose, the battery piece printing device comprises a light emitting module used for emitting first light when a trigger signal is received; the light receiving module is used for receiving the second light; the control module is used for analyzing information of the first light and the second light and judging whether the position of the screen needs to be adjusted or not; and the execution module is used for adjusting the screen printing plate to be aligned with the battery piece when the position of the screen printing plate needs to be adjusted. Based on the optical principle, the positions of the screen printing plate and the battery piece are determined by using the light emitting module and the optical fiber receiving module, so that the screen printing plate and the battery piece are automatically aligned. According to the invention, the alignment of the printing screen and the battery piece can be quickly and accurately realized, so that the printing quality and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and specifically provides a cell printing device, a printing screen, and a cell preparation device. Background Art

[0002] Solar cell metallization is to use a screen printer to print metal paste in a graphic manner to a designated location on the blue film of the battery to collect current. In experimental research and development or production, changing the battery experimental batch, changing the screen, and scrubbing the screen will cause printing deviation. Once the printing is offset, it will cause battery leakage and reduced efficiency at the least, or even cause the battery to be scrapped.

[0003] In traditional technology, for printing offset, the industry usually requires technicians to manually adjust the offset parameters, and then observe under a microscope after printing. Only after repeated adjustments can the position parameters be finally determined. Manual alignment is slow and has poor accuracy, which ultimately leads to poor printing quality and low efficiency.

[0004] Accordingly, the art needs a new solution of a cell printing device, a printing screen, and a cell preparation equipment to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the present application is proposed to provide a cell printing device, a printing screen and a cell preparation equipment that solve or at least partially solve the technical problem of poor alignment effect when manually aligning the printing screen and the cell in the prior art.

[0006] In a first aspect, the present application provides a cell printing device, comprising: a light emitting module, configured to emit a first light upon receiving a trigger signal, wherein the first light passes through the screen and then irradiates the cell to be printed;

[0007] A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the cell and passes through the screen;

[0008] A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted;

[0009] An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

[0010] In a technical solution of the above-mentioned cell printing device, the control module determines whether the position of the screen needs to be adjusted, including:

[0011] Obtaining parameter information of the second light;

[0012] Based on the parameter information, determining the topography of the position on the cell where the first light is reflected;

[0013] Based on the topography, determining the position of the battery cell;

[0014] Based on the preset position of the screen and the position of the battery cell, determining whether the screen is aligned with the battery cell;

[0015] If not, it is determined that the position of the screen needs to be adjusted.

[0016] In a technical solution of the above-mentioned cell printing device, a plurality of first punctuation marks are arranged on the cell, and a plurality of second punctuation marks are arranged on the screen; the light emitting module and the light receiving module are arranged on a side of the screen away from the cell, and the vertical projections of the light emitting module and the light receiving module on the screen coincide with the second punctuation marks; the first light emitted by the light emitting module passes through the second punctuation marks and then irradiates the first punctuation marks; the first light is reflected at the first punctuation marks as the second light; the second light is received by the light receiving module after passing through the second punctuation marks.

[0017] In a technical solution of the above-mentioned cell printing device, the device further includes a detection module and an image acquisition module, wherein:

[0018] The detection module is used to determine whether the cell is the first cell to be printed before the light emitting module emits the first light;

[0019] The image acquisition module is electrically connected to the detection module, and is used to acquire a first image of the battery cell at a preset station when it is determined that the battery cell is the first battery cell to be printed;

[0020] The control module is electrically connected to the image acquisition module, and is further used to determine a first position of the battery cell based on edge information of the battery cell in the first image;

[0021] The execution module is further used to preliminarily adjust the position of the screen based on the first position of the battery sheet.

[0022] In a technical solution of the above-mentioned battery cell printing device, when it is determined that the battery cell is not the first battery cell to be printed,

[0023] The image acquisition module is further used to acquire a second image of the battery cell when it is on the preset station;

[0024] The control module is further used to determine a second position of the battery cell based on a position of the first mark in the second image;

[0025] The execution module is further used to adjust the position of the screen based on the second position of the battery sheet.

[0026] In a technical solution of the above-mentioned cell printing device, the number of the first punctuation marks, the number of the second punctuation marks, the number of the light emitting modules and the number of the light receiving modules are all equal, wherein:

[0027] One of the first punctuation marks corresponds to one of the second punctuation marks, one of the light emitting modules and one of the light receiving modules;

[0028] When the screen is aligned with the battery cell, a vertical projection of each of the first punctuation points on the screen coincides with the corresponding second punctuation point.

[0029] In a second aspect, the present application provides a printing screen, wherein the screen is applied to a battery cell printing device.

[0030] The cell printing device comprises:

[0031] A light emitting module, used to emit a first light upon receiving a trigger signal, wherein the first light is irradiated to the battery sheet to be printed;

[0032] A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the battery cell;

[0033] A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted;

[0034] An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

[0035] In a technical solution of the above-mentioned printing screen, a plurality of first punctuation points are arranged on the battery cell, a plurality of second punctuation points are arranged on the screen, the first light passes through the second punctuation points and then irradiates the first punctuation points, and is reflected at the first punctuation points as the second light.

[0036] In a technical solution of the above-mentioned printing screen, the size of the second punctuation mark is larger than the size of the first punctuation mark.

[0037] In a technical solution of the above printing screen, the material composition of the second punctuation points at least includes polycarbonate.

[0038] In a third aspect, a battery cell preparation device is provided, comprising a battery cell printing device,

[0039] The cell printing device comprises:

[0040] A light emitting module, used to emit a first light upon receiving a trigger signal, wherein the first light is irradiated to the battery sheet to be printed;

[0041] A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the battery cell;

[0042] A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted;

[0043] An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

[0044] The above one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0045] In the technical solution of the present application, based on optical principles, the positions of the screen and the cell are determined by using a light emitting module and an optical fiber receiving module so as to automatically align the two. Through the present application, the alignment of the printing screen and the cell can be achieved quickly and accurately, thereby improving the printing quality and efficiency.

[0046] Furthermore, in the technical solution of the present application, a second punctuation point corresponding to the first punctuation point on the cell is provided on the screen. Based on the emitted first light and the received second light, the relative position of the screen and the cell is determined, and the screen movement is controlled according to the relative position to align the first punctuation point with the second punctuation point one by one. By using the second punctuation point on the screen for alignment, the alignment accuracy can be improved, thereby ensuring the printing quality.

[0047] Furthermore, in the technical solution for implementing the present application, the light emitting module is located above the second punctuation mark of the screen, thereby ensuring that the emission source of the emitted first light is located above the second punctuation mark, thereby reducing the amount of data for subsequent calculations and indirectly improving the efficiency of data processing.

[0048] Furthermore, in the implementation of the technical solution of the present application, if the cell is determined to be the first cell on the assembly line, the first position of the cell is analyzed based on image recognition technology, thereby providing a basis for pre-adjusting the position of the screen. For the first cell, under the premise that its position cannot be predicted in advance, its first position is determined by identifying its edge to ensure that the outline of the first cell can be fully identified. After determining the approximate position of the first cell, the position of the screen is pre-adjusted, so that when the cell is subsequently printed, there is no need to make significant adjustments to the screen, further improving printing efficiency and quality.

[0049] Furthermore, in the technical solution of the present application, if it is determined that the battery cell is not the first battery cell, the first punctuation mark set on the battery cell is identified based on the image recognition technology, so as to analyze the second position of the battery cell. Since the same batch of battery cells usually do not have a large displacement difference, after the screen prints the first battery cell, its position has been roughly determined. For subsequent battery cells, the first punctuation mark is identified to further accurately determine the position of the battery cell, that is, the second position, so as to fine-tune the screen based on the second position. Compared with the method of analyzing the first position of the battery cell by identifying the edge contour to analyze the second position of the battery cell, the method of identifying the first punctuation mark reduces the amount of data and improves the data processing efficiency.

[0050] Furthermore, in the technical solution for implementing the present application, the material composition of the second punctuation mark of the screen includes at least polycarbonate, so that the second punctuation mark has high transparency and strong toughness, and ensures that it can be bonded and fused with the photosensitive adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0052] Figure 1 is a schematic diagram of the main structure of a cell printing device according to an embodiment of the present application;

[0053] Figure 2 is a schematic diagram of the main structure of a cell printing device according to an embodiment of the present application;

[0054] Figure 3 is a schematic diagram of the positional relationship of aligning a screen and a battery cell according to an embodiment of the present application;

[0055] Figure 4 is a schematic diagram of a first light ray and a second light ray according to an embodiment of the present application;

[0056] Figure 5 It is a schematic diagram of the structural block diagram of a battery cell preparation device according to an embodiment of the present application.

[0057] List of reference numerals:

[0058] 01: light emitting module; 02: light receiving module; 03: control module; 04: execution module; 05: detection module; 06: image acquisition module; 1: screen; 11: second punctuation mark; 2: battery cell; 21: first punctuation mark; 3: first light; 4: second light; 50: table; 51: printing station; 52: first optional station; 53: second optional station; 54: third optional station; 60: battery cell printing device. DETAILED DESCRIPTION

[0059] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0060] In the description of the present application, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software parts, such as program code, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program code, such as a disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B" and may include only A, only B or A and B. The singular terms "one" and "the" may also include plural forms.

[0061] See attached Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the main structure of a cell printing device according to an embodiment of the present application. Figure 1 As shown, the cell printing device in the embodiment of the present application mainly includes a light emitting module 01, a light receiving module 02, a control module 03 and an execution module 04, wherein:

[0062] The light emitting module 01 is used to emit a first light when receiving a trigger signal, and the first light passes through the screen and then irradiates the battery cell to be printed; the light receiving module 02 is used to receive a second light, wherein the second light is the first light reflected by the battery cell and passed through the screen; the control module 03 is electrically connected to the light emitting module and the light receiving module, and is used to analyze the information of the first light and the second light to determine whether the position of the screen needs to be adjusted; the execution module 04 is electrically connected to the control module, and when the screen position needs to be adjusted, the screen is adjusted to align with the battery cell.

[0063] In this embodiment, the light emitting module 01 can emit a beam of first light in a specific direction, or can emit multiple beams of first light in a specific area. When the light emitting module 01 is working, the parameter information of the first light, such as the light emission angle, emission direction or emission angle, wavelength, brightness, etc., can be recorded and transmitted to the control module 03. The light receiving module 02 can identify the received light to identify the first light after being reflected from all the received light. When the light receiving module 02 is working, the relevant information of the second light, such as the light receiving angle, source direction or incident angle, wavelength, brightness, etc., is recorded and the parameter information of the second light is transmitted to the control module 03. The control module 03 can obtain the relevant information such as material, topography, etc. at the position of the reflected first light based on the parameter information of the received second light. Based on the relevant information at the reflection position, the position and placement posture of the battery cell, such as whether it is straight or deflected, can be accurately determined. Since the position of the screen is known, the screen can be controlled by the execution module 04 to align with the battery cell.

[0064] In one implementation of this embodiment, the step of the control module determining whether the position of the screen needs to be adjusted includes:

[0065] Obtain parameter information of the second light; based on the parameter information, determine the morphology of the position on the battery cell where the first light is reflected; based on the morphology, determine the position of the battery cell; based on the preset position of the screen and the position of the battery cell, determine whether the screen is aligned with the battery cell; if not, determine that the position of the screen needs to be adjusted.

[0066] In one implementation of the present embodiment, a plurality of first punctuation marks are arranged on the battery cell, and a plurality of second punctuation marks are arranged on the screen; the light emitting module and the light receiving module are arranged on a side of the screen away from the battery cell, and the vertical projections of the light emitting module and the light receiving module on the screen coincide with the second punctuation marks; the first light emitted by the light emitting module passes through the second punctuation mark and then irradiates the first punctuation mark; the first light is reflected at the first punctuation mark as the second light; the second light is received by the light receiving module after passing through the second punctuation mark.

[0067] In this embodiment, taking the horizontal placement of the cell sheet and the screen as an example, the screen is located directly above the cell sheet and the two are parallel to each other. The light emitting module 01 and the light receiving module 02 are both located directly above the second mark of the screen.

[0068] Please refer to the attached Figure 2 , Figure 2 FIG. 1 is a schematic diagram of the main structure of a cell printing device according to an embodiment of the present application. Figure 2 As shown, the cell printing device of the present application further includes a detection module 05 and an image acquisition module 06, wherein:

[0069] The detection module 05 is used to determine whether the battery cell is the first battery cell to be printed before the light emitting module 01 emits the first light; the image acquisition module 06 is electrically connected to the detection module 05, and is used to obtain a first image of the battery cell at a preset work station when the battery cell is determined to be the first battery cell to be printed; the control module 03 is electrically connected to the image acquisition module 06, and is also used to determine the first position of the battery cell based on the edge information of the battery cell in the first image; the execution module 04 is also used to make a preliminary adjustment to the position of the screen based on the first position of the battery cell.

[0070] In this embodiment, the battery cell to be processed that is in the first position in each production and preparation cycle is usually called the first battery cell. In other cases, a specified battery cell can also be recorded as the first battery cell. In the same production and preparation cycle, the position of each battery cell will hardly differ greatly. However, before the position of the first battery cell is roughly determined, the positions of all subsequent battery cells cannot be predicted in advance. Therefore, it is very necessary to analyze the first battery cell. The preset target station is the station where the battery cell is printed, and the first image should at least contain an image of the complete battery cell. Since the position of the first battery cell is completely unknown in advance, the visual recognition technology can be used to analyze the RGB value, brightness value, etc. of the pixel point to identify the contour information of the battery cell, and the position of the battery cell on the preset target station, i.e., the first position, is determined based on the contour information. The position and / or posture of the screen is preliminarily adjusted to the top of the battery cell. In this embodiment, if it is determined that the battery cell is not the first battery cell, it means that the screen has printed at least one battery cell and the position of the screen is already in a roughly accurate position. Therefore, for a battery cell other than the first battery cell, its image can continue to be acquired to determine its position based on its contour, or the capture of subsequent images can be canceled for the purpose of saving resources and reducing the amount of data. The specific method is not limited here.

[0071] In one implementation of the present embodiment, when it is determined that the battery cell is not the first battery cell to be printed, the image acquisition module 06 is further used to acquire a second image of the battery cell at a preset workstation; the control module 03 is further used to determine the second position of the battery cell based on the position of the first punctuation mark in the second image; and the execution module 04 is further used to adjust the position of the screen based on the second position of the battery cell.

[0072] In this embodiment, the second image should at least include an image of a complete battery cell. Since the positions of different battery cells on the preset target station in the same production cycle will not be significantly different, the shooting parameters such as shooting angle and shooting area for obtaining the second image and the aforementioned first image can be kept consistent, so that the position of the battery cell and the position difference of the battery cell can be analyzed more quickly. Under the premise that the approximate position of the battery cell is known, the RGB value, brightness value, etc. of the pixel point can be analyzed by visual recognition technology to identify the first punctuation point, and the position of the battery cell on the preset target station, i.e., the second position, can be determined based on the parameter information of the first punctuation point in the second image, such as pixel coordinates. The position and / or posture of the screen can be fine-tuned so that the screen can be pre-adjusted more accurately to the top of the battery cell.

[0073] In one embodiment, the number of first punctuation points, the number of second punctuation points, the number of light emitting modules and the number of light receiving modules are all equal, wherein one first punctuation point corresponds to one second punctuation point, one light emitting module and one light receiving module; when the screen is aligned with the battery cell, the vertical projection of each first punctuation point on the screen coincides with its corresponding second punctuation point.

[0074] In this embodiment, the layout of the second punctuation is the same as the layout of the first punctuation. The same combination includes a first punctuation, a second punctuation corresponding to the first punctuation, a light emitting module 01, and a light receiving module 02. Taking the horizontal placement of the cell and the screen as an example, the screen is located directly above the cell and the two are parallel to each other. When the screen is aligned with the cell, the second punctuation on the screen will correspond to the first punctuation on the cell one by one, and the vertical projection of the second punctuation on the cell coincides with the first punctuation.

[0075] Please refer to the attached Figure 3 and attached Figure 4 , Figure 3 is a schematic diagram of the positional relationship between the screen and the battery sheet according to an embodiment of the present application, Figure 4 Schematic diagram of a first light beam and a second light beam according to an embodiment of the present application. Figure 3 and Figure 4As shown, the light emitting module 01 (the other light emitting modules are not numbered) corresponds to the second punctuation mark 11 (the other second punctuation marks are not numbered), and each light emitting module 01 and light receiving module 02 are located directly above the corresponding second punctuation mark 11. The screen 1 is located directly above the battery cell 2. When the screen 1 moves to the target position, each second punctuation mark 11 is located directly above the corresponding first punctuation mark 21 (the other first punctuation marks are not numbered).

[0076] Furthermore, the present application also provides a printing screen, which is applied to a battery cell printing device, and the battery cell printing device includes: a light emitting module, which is used to emit a first light when a trigger signal is received, and the first light is irradiated to the battery cell to be printed; a light receiving module, which is used to receive a second light, wherein the second light is the light after the first light is reflected by the battery cell; a control module, which is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light, and determine whether the position of the screen needs to be adjusted; an execution module, which is electrically connected to the control module, and when the screen position needs to be adjusted, adjusts the screen to align with the battery cell.

[0077] In one implementation of this embodiment, a plurality of first punctuation points are arranged on the cell sheet, a plurality of second punctuation points are arranged on the screen, the first light passes through the second punctuation points and then irradiates the first punctuation points, and is reflected as the second light at the first punctuation points.

[0078] In one implementation of this embodiment, the size of the second mark point is larger than the size of the first mark point, thereby ensuring that both the first light and the second light can pass through the second mark point.

[0079] In one implementation of this embodiment, the material composition of the second mark includes at least polycarbonate, making full use of the characteristics of polycarbonate such as high transparency, good toughness, and being able to be bonded and fused with photosensitive adhesive, so as to ensure that the first light and the second light can smoothly pass through the second mark.

[0080] Furthermore, the present application also provides a battery cell preparation device, including a battery cell printing device, the battery cell printing device including: a light emitting module, used to emit a first light when receiving a trigger signal, the first light irradiating the battery cell to be printed; a light receiving module, used to receive a second light, wherein the second light is the light after the first light is reflected by the battery cell; a control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted; an execution module, the execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to align with the battery cell.

[0081] In one embodiment, see the attached Figure 5 , Figure 5 Schematic diagram of the structure of a battery cell preparation device according to an embodiment of the present application. Figure 5 As shown, the cell preparation equipment of the present application includes at least a table 50 and a cell printing device 60, wherein the table 50 also includes at least a printing station 51, and the step of printing the cell is performed at the printing station 51. The table 50 may also include a first optional station 52, a second optional station 53, and a third optional station 54. Those skilled in the art may make corresponding adjustments to the functions of each station according to actual conditions, for example, using the first optional station 52 as a cell input station and the third optional station 54 as a cell output station. After the first cell arrives at the cell input station 52, the image acquisition module 06 uses the edge capture mode to identify the cell contour and thereby determine the cell position. At this time, the screen is preliminarily adjusted according to the cell position. Then the table rotates to move the cell from the cell input station 52 to the printing station 51. At this time, the light emitting module 01 emits infrared light from the screen mark point to the cell surface mark point. The light reflected from the cell surface mark point passes through the screen mark point and is received by the light receiving module 02. The control module 03 analyzes the surface morphology of the cell directly below the screen mark point to determine the position of the cell. According to the position of the cell, the screen is moved again to a more accurate position for printing. After printing is completed, the table rotates to transfer the cell to the cell output station 54 to start the next process.

[0082] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present application, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0083] It is understood by those skilled in the art that each module in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present application, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present application.

[0084] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A cell printing device, characterized in that: include: A light emitting module, used for emitting a first light upon receiving a trigger signal, wherein the first light passes through the screen and irradiates the battery sheet to be printed; A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the cell and passes through the screen; A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted; An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

2. The cell printing device according to claim 1, characterized in that: The control module determines whether the position of the screen needs to be adjusted, including: Obtaining parameter information of the second light; Based on the parameter information, determining the topography of the position on the cell where the first light is reflected; Based on the topography, determining the position of the battery cell; Based on the preset position of the screen and the position of the battery cell, determining whether the screen is aligned with the battery cell; If not, it is determined that the position of the screen needs to be adjusted.

3. The cell printing device according to claim 2, characterized in that: A plurality of first punctuation points are arranged on the battery cell, and a plurality of second punctuation points are arranged on the screen; the light emitting module and the light receiving module are arranged on a side of the screen away from the battery cell, and the vertical projections of the light emitting module and the light receiving module on the screen coincide with the second punctuation points; the first light emitted by the light emitting module passes through the second punctuation points and then irradiates the first punctuation points; the first light is reflected at the first punctuation points as the second light; the second light is received by the light receiving module after passing through the second punctuation points.

4. The cell printing device according to claim 3, characterized in that: The device also includes a detection module and an image acquisition module, wherein: The detection module is used to determine whether the cell is the first cell to be printed before the light emitting module emits the first light; The image acquisition module is electrically connected to the detection module, and is used to acquire a first image of the battery cell at a preset station when it is determined that the battery cell is the first battery cell to be printed; The control module is electrically connected to the image acquisition module, and is further used to determine a first position of the battery cell based on edge information of the battery cell in the first image; The execution module is further used to preliminarily adjust the position of the screen based on the first position of the battery sheet.

5. The cell printing device according to claim 4, characterized in that: When it is determined that the battery cell is not the first battery cell to be printed, The image acquisition module is further used to acquire a second image of the battery cell when it is on the preset station; The control module is further used to determine a second position of the battery cell based on a position of the first mark in the second image; The execution module is further used to adjust the position of the screen based on the second position of the battery sheet.

6. The cell printing device according to claim 3, characterized in that: The number of the first punctuation marks, the number of the second punctuation marks, the number of the light emitting modules, and the number of the light receiving modules are all equal, wherein: One of the first punctuation marks corresponds to one of the second punctuation marks, one of the light emitting modules and one of the light receiving modules; When the screen is aligned with the battery cell, a vertical projection of each of the first punctuation points on the screen coincides with the corresponding second punctuation point.

7. A printing screen, characterized in that: The screen is used in a battery sheet printing device. The cell printing device comprises: A light emitting module, used to emit a first light upon receiving a trigger signal, wherein the first light is irradiated to the battery sheet to be printed; A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the battery cell; A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted; An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

8. The printing screen according to claim 7, characterized in that: A plurality of first punctuation points are arranged on the battery sheet, a plurality of second punctuation points are arranged on the screen, the first light passes through the second punctuation points and then irradiates the first punctuation points, and is reflected at the first punctuation points to become the second light.

9. The printing screen according to claim 8, characterized in that: The size of the second punctuation mark is larger than the size of the first punctuation mark.

10. The printing screen according to claim 8, characterized in that: The material composition of the second mark includes at least polycarbonate.

11. A battery cell preparation device, comprising a battery cell printing device, The cell printing device comprises: A light emitting module, used to emit a first light upon receiving a trigger signal, wherein the first light is irradiated to the battery sheet to be printed; A light receiving module, used for receiving a second light, wherein the second light is the light after the first light is reflected by the battery cell; A control module, the control module is electrically connected to the light emitting module and the light receiving module, and is used to analyze information of the first light and the second light to determine whether the position of the screen needs to be adjusted; An execution module is electrically connected to the control module, and when the position of the screen needs to be adjusted, the screen is adjusted to be aligned with the battery sheet.

Images