Cylindrical battery cell printing method, apparatus, device, and medium

Abstract

The application discloses a cylindrical battery printing method, device, equipment and medium, and a target printing pattern is constrained to be a parallelogram, so that the target printing pattern has the possibility of spiral printing to the side surface of the cylindrical battery, and then a section of a printing nozzle without nozzle failure can be constrained by using a starting printing nozzle and a terminal printing nozzle, spiral printing is performed based on the target printing pattern, and coverage of the side surface of the cylindrical battery is formed. Through flexible selection of an effective nozzle interval, the application avoids nozzles with poor ink ejection effect or failure, reduces the possibility of problems such as printing white space and uneven ink layer caused by nozzle problems, and at the same time, because the spiral printing method is adopted, a special cylindrical printing device is not needed, that is, the printing nozzle does not need to be able to completely cover the height of the entire cylindrical battery, and a conventional device can complete printing. In addition, the printing of a large cylindrical battery can also be realized by using the application.

Description

Technical Field

[0001] This application relates to the field of battery cells, and in particular to a method, apparatus, equipment and medium for printing cylindrical battery cells. Background Technology

[0002] In the production of cylindrical battery cells, insulating ink needs to be precisely printed onto their sides using a printhead to ensure the cell's insulation performance. The current mainstream printing method involves fixing the cylindrical cell so it can rotate stably around its central axis, while using a printhead that covers the entire height of the cylinder to simultaneously complete the side printing operation as the cell rotates. However, when this method is implemented, some nozzles in the printhead may malfunction. This results in blank areas or extremely uneven printing, which not only damages the integrity of the insulating ink layer but also severely affects the final insulation performance. Summary of the Invention

[0003] This application aims to provide a method, apparatus, device, and medium for printing cylindrical battery cells, which can still perform insulation printing even when the nozzle in the print head malfunctions.

[0004] Cylindrical cell printing according to a first aspect embodiment of this application includes:

[0005] Obtain the cell height and diameter of the cylindrical battery cell, as well as the printing resolution of the print head in the X direction, the print head resolution in the Y direction, and the theoretical printing length in the X direction;

[0006] Determine the first offset length of the starting print nozzle from the first nozzle in the X direction, and the second offset length of the ending print nozzle from the first nozzle in the X direction.

[0007] The bottom offset of the graphic is determined based on the first offset length and the theoretical printing length;

[0008] The top offset of the graphic is determined based on the second offset length and the theoretical printing length;

[0009] The target printing width is determined based on the cell height and the printing resolution.

[0010] The target printing height is determined based on the cell diameter and the printhead resolution.

[0011] The target printable graphic is determined based on the target print width, the bottom offset of the graphic, the top offset of the graphic, and the target print height.

[0012] Using the nozzles between the starting and ending printing nozzles within the print head, the target print pattern is spirally printed onto the side of the cylindrical battery cell, wherein the target print pattern, after printing, forms a cover over the side of the cylindrical battery cell.

[0013] The cylindrical cell printing apparatus according to a second aspect embodiment of this application includes:

[0014] The parameter acquisition module is used to acquire the cell height and cell diameter of the cylindrical battery cell, as well as the printing resolution of the print head in the X direction, the print head resolution in the Y direction, and the theoretical printing length in the X direction.

[0015] The printhead offset determination module is used to determine the first offset length of the starting printhead nozzle from the first nozzle in the X direction, and the second offset length of the ending printhead nozzle from the first nozzle in the X direction.

[0016] The bottom offset determination module is used to determine the bottom offset of the graphic based on the first offset length and the theoretical printing length;

[0017] The top offset determination module is used to determine the top offset of the graphic based on the second offset length and the theoretical printing length;

[0018] A print width determination module is used to determine the target print width based on the cell height and the print resolution;

[0019] A printing height determination module is used to determine the target printing height based on the cell diameter and the printhead resolution;

[0020] The print graphic determination module is used to determine the target print graphic based on the target print width, the bottom offset of the graphic, the top offset of the graphic, and the target print height;

[0021] The printing execution control module is used to use the nozzles between the starting printing nozzle and the ending printing nozzle in the print head to spirally print the target print pattern onto the side of the cylindrical battery cell, wherein the target print pattern, after printing is completed, forms a cover over the side of the cylindrical battery cell.

[0022] An electronic device according to a third aspect of this application includes: a processor and a memory storing computer program instructions;

[0023] When the processor executes computer program instructions, it implements the cylindrical cell printing method as described in the first aspect embodiment.

[0024] A computer-readable storage medium according to a fourth aspect embodiment of the present application stores computer-executable instructions for performing the cylindrical cell printing method as described in the first aspect embodiment above.

[0025] The cylindrical battery cell printing method, apparatus, device, and medium of this application constrain the target printing pattern into a parallelogram, thereby enabling the target printing pattern to be spirally printed to the side of the cylindrical battery cell. Furthermore, the starting and ending printing nozzles can be used to constrain the section of the printing nozzle without nozzle malfunctions, and spiral printing is performed based on the target printing pattern to cover the side of the cylindrical battery cell. This application embodiment flexibly selects effective nozzle intervals, avoiding nozzles with poor ink output or malfunctions, reducing the possibility of printing gaps and uneven ink layers due to nozzle problems. Simultaneously, because a spiral printing method is used, no dedicated cylindrical printing equipment is required, meaning the printing nozzle does not need to completely cover the height of the cylindrical battery cell; conventional equipment can complete the printing. In addition, the embodiments of this application can also be used to print large cylindrical battery cells.

[0026] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the printing device according to an embodiment of this application;

[0029] Figure 2 This is a flowchart of a cylindrical battery cell printing method according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram showing the dimensions of a cylindrical battery cell according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram showing the side of a cylindrical battery cell unfolded along the cell height line according to an embodiment of this application;

[0032] Figure 5 This is a schematic diagram showing the target printed pattern spirally printed to the side of the battery cell and then unfolded along the height line of the battery cell in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the target printed pattern in the case of ink ejection from all ink holes of the print head in the cylindrical cell printing method of this application embodiment;

[0034] Figure 7This is a schematic diagram of the target printed pattern in the case of ink ejection from the ink holes of the print head in the cylindrical cell printing method of this application embodiment;

[0035] Figure 8 This is a diagram showing the effect of the printed detection pattern in the cylindrical battery cell printing method of this application embodiment;

[0036] Figure 9 This is a schematic diagram of the layout of the nozzles in the print head according to an embodiment of this application.

[0037] Figure label:

[0038] Frame 110, rotating structure 120, print head 130, cylindrical battery cell 200. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0041] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In the description of this application, it should be noted that, unless otherwise explicitly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0043] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this application, not all embodiments.

[0044] To better describe the cylindrical battery cell printing method, apparatus, device, and medium of the embodiments of this application, a printing device is proposed herein, with reference to... Figure 1The printing device includes a frame 110, a rotating structure 120, a translational support, a print head 130, and a control unit. The rotating mechanism is mounted on the frame 110 and is used to rotate and fix the cylindrical battery cell 200, while simultaneously driving the cylindrical battery cell 200 to rotate around its own central axis. The translational support can be mounted on the frame 110 or on an external support structure, and is used to move the print head 130 along the central axis of the cylindrical battery cell 200. The print head 130 is typically positioned directly above the central axis, and the cylindrical battery cell 200 is typically kept horizontal. The control unit controls the operation of the rotating mechanism to make the cylindrical battery cell 200 rotate around its own central axis, and also controls the translational support to move the print head 130 along the central axis of the cylindrical battery cell 200.

[0045] The following describes the cylindrical battery cell printing method, apparatus, device, and medium according to the embodiments of this application based on the above-described printing equipment. It should be noted that the above-described printing equipment is for better understanding of the technical solutions in the embodiments of this application and should not be regarded as a limitation on the scope of protection of this application.

[0046] like Figure 2 As shown, Figure 2 This is a flowchart of a cylindrical battery cell printing method according to an embodiment of the present application. The cylindrical battery cell printing method is applied to a control unit and includes steps S100 to S800.

[0047] Step S100: Obtain the cell height and cell diameter of the cylindrical cell 200, as well as the printing resolution of the print head 130 in the X direction, the print head resolution in the Y direction, and the theoretical printing length in the X direction.

[0048] Step S200: Determine the first offset length of the starting printing nozzle of the print head 130 in the X direction from the first nozzle, and the second offset length of the ending printing nozzle of the print head 130 in the X direction from the first nozzle.

[0049] Step S300: Determine the bottom offset of the graphic based on the first offset length and the theoretical printing length;

[0050] Step S400: Determine the top offset of the graphic based on the second offset length and the theoretical printing length;

[0051] Step S500: Determine the target printing width based on the cell height and printing resolution;

[0052] Step S600: Determine the target printing height based on the cell diameter and printhead resolution;

[0053] Step S700: Determine the target printable graphic based on the target print width, bottom offset of the graphic, top offset of the graphic, and target print height;

[0054] In step S800, the target print pattern is spirally printed onto the side of the cylindrical battery cell 200 using the nozzles between the starting and ending print nozzles in the print head 130. After the target print pattern is printed, it covers the side of the cylindrical battery cell 200.

[0055] In this embodiment, the target print pattern is constrained into a parallelogram, making it possible to spiral print the target print pattern to the side of the cylindrical cell 200. Furthermore, the starting and ending print nozzles can be used to constrain the section of the print head 130 that is free of nozzle malfunctions. Spiral printing is then performed based on the target print pattern to cover the side of the cylindrical cell 200. This embodiment flexibly selects effective nozzle intervals, avoiding nozzles with poor ink output or malfunctions, reducing the possibility of print gaps and uneven ink layers caused by nozzle problems. Simultaneously, because a spiral printing method is used, no dedicated cylindrical printing equipment is required (i.e., the print head 130 does not need to completely cover the entire height of the cylindrical cell 200); conventional equipment can complete the printing. Furthermore, this embodiment can also be used to print large cylindrical cells 200.

[0056] The X direction mentioned above can be understood as the direction of nozzle movement.

[0057] The Y direction mentioned above can be understood as the direction perpendicular to the direction of print head movement on the plane where the print head 130 is located.

[0058] The above printing resolution and printhead resolution are preset parameters that can be manually determined in advance.

[0059] The theoretical printing length mentioned above can be understood as the two-dimensional distribution of nozzles in the print head 130 (e.g., Figure 9 As shown, Figure 9 Each hollow circle in the diagram can be understood as a nozzle; the nozzles in the diagram are arranged in a two-dimensional layout. Figure 9 (For illustration only; the actual number of printhead nozzles will be much greater than the number shown in the diagram.) Under the condition that all nozzles are functioning without faults, the printing length in the X direction is, specifically, each nozzle can correspond to one print pixel. The theoretical printing length can be understood as the sum of the lengths of the print pixels obtained by all nozzles in the X direction printing synchronously under the condition that all nozzles are functioning without faults.

[0060] The above-mentioned first nozzle, starting print nozzle, and ending print nozzle can be used as a reference. Figure 9 To understand this, for the two-dimensionally distributed nozzles in the print head 130, the nozzles in the X direction can be understood as a row. For a row of nozzles, there are naturally multiple nozzle positions arranged in sequence (e.g., Figure 9If we consider a row of nozzles from left to right, then the nozzle at the beginning of that row can be considered the first nozzle, and the nozzle at the end can be considered the last nozzle. The starting and ending nozzles together define a region of nozzles without malfunctions. Figure 9 As shown, Figure 9 The Q position can be understood as the position corresponding to the starting print nozzle, and the Z position can be understood as the position corresponding to the ending print nozzle. That is, the starting print nozzle and the ending print nozzle can be understood as preset positions, or as the starting and ending positions of the nozzles corresponding to the sections without printing faults, which are automatically constrained based on the faulty nozzles in the print head.

[0061] Each nozzle corresponds to a printing pixel. By determining the positions of the starting and ending printing nozzles in the X direction, the first and second offset lengths can be quickly determined using the nozzle positions and the space occupied by the printing pixels. In some implementations, the distance from each nozzle to the first nozzle can be predetermined and stored in the control unit. Therefore, after determining the positions of the starting and ending printing nozzles, the corresponding offset length can be obtained directly by looking up a table.

[0062] The target printed shape is essentially a parallelogram, which can be understood as a basic printed rectangle determined by the target printed width and target printed height. It is obtained by offsetting the top and bottom edges of the basic printed rectangle using the first and second offset lengths. Since the first and second offset lengths are determined based on the position of the starting and ending printing nozzles, the parallelogram obtained by offsetting the basic printed rectangle can better adapt to changes in the actual printed length, the position of the starting and ending printing nozzles, and facilitate flexible spiral printing.

[0063] The above-mentioned side view of the cylindrical battery cell 200 can be used as a reference. Figure 3 , Figure 4 In other words, the height of the basic printed rectangle can be understood as the product of the cell diameter and π, and the width can be understood as the cell height. (Reference) Figures 5 to 7 The target printed graphic is a basic printed quadrilateral shape (e.g.) Figure 6 , Figure 7 The colored area is obtained by offsetting the basic printed rectangle shape, and thus has the same area as the basic printed rectangle shape. The target printing width can be determined according to the cell height, and the target printing height can be determined according to the cell diameter. Furthermore, since the print head 130 has a print head resolution, it is necessary to further convert the print resolution to obtain the target printing width and target printing height that can be used by the printing device.

[0064] Once the target print pattern is determined, the printing equipment can be controlled to use the nozzles between the starting and ending print nozzles within the print head 130 to spirally print the target print pattern onto the side of the cylindrical battery cell 200. It should be noted that during the spiral printing process, overlap between the target print patterns should be avoided, and the spacing should be controlled within the preset allowable spacing range. The desired effect is as follows: Figure 6 , Figure 7 As shown, Figure 6 , Figure 7 The parallelogram section can be understood as the shape of the cylindrical battery cell 200 after its insulating spiral has been unfolded. It should be noted that when overlap or excessive spacing occurs, the rotation speed of the battery cell and the moving speed of the print head 130 should be adjusted accordingly to overcome the problems of overlap and excessive spacing.

[0065] In some implementations, the position of the starting print nozzle and the position of the ending print nozzle can be determined by the following steps:

[0066] Print the inspection pattern using all the nozzles of print head 130;

[0067] Based on the distortion state in the detected pattern, determine the position of the starting and ending print nozzles.

[0068] When the printed detection image is distorted, such as Figure 8 As shown, there are obvious abnormalities (such as...). Figure 8 One-third of the way from the left to the right (the area highlighted in red), and then the starting and ending printing nozzles can be selected directly based on the specific coverage area of ​​the distortion state in the printed detection pattern, so that there is no distortion in the area between the starting and ending printing nozzles.

[0069] In some implementations, the target print width is constrained by the following formula:

[0070] Image_W1 =(H / 25.4)× DPI_X;

[0071] In the formula, Image_W1 is the target printing width, H is the cell height, and DPI_X is the printing resolution;

[0072] The target print height is determined by the following formula:

[0073] Image_H1 =(D×π / 25.4)×DPI_Y;

[0074] In the formula, Image_H1 is the target printing height, D is the cell diameter, and DPI_Y is the printhead resolution.

[0075] In this embodiment, the target printing width and target printing height that can be operated by the print head 130 can be quickly determined using the above formula.

[0076] In some implementations, the target print graphic is determined based on the target print width, the bottom offset of the graphic, the top offset of the graphic, and the target print height, including:

[0077] Determine the basic printing rectangle shape based on the target printing width and target printing height;

[0078] Offset the top edge of the base printed rectangle based on the top offset of the graphic, and offset the bottom edge of the base printed rectangle based on the bottom offset of the graphic to obtain the base printed quadrilateral graphic.

[0079] By offsetting the bottom and top of the graphic, the basic printed quadrilateral graphic is filled into a rectangle to obtain the target printed graphic. In the case that the target printed graphic is spirally printed to the side of the cylindrical cell 200, the basic printed quadrilateral graphic forms a cover over the side of the cylindrical cell 200.

[0080] The above-mentioned basic printed rectangular shape can be understood as being obtained by directly unfolding the side of the cylindrical cell 200.

[0081] The above-described offset operation, which adjusts the top edge of the base printed rectangle by an offset of Δ2, can be referenced. Figure 7 The above-described offset operation, which adjusts the bottom edge of the base printed rectangle by an offset of Δ1 from the bottom edge of the graphic, can be referenced. Figure 7 The area of ​​the base printed quadrilateral shape after the offset operation remains consistent with that of the base printed rectangle shape, meaning that it can still cover the side of the cylindrical cell 200.

[0082] The above-mentioned basic printed quadrilateral shape can be referenced when the starting print nozzle and the ending print nozzle 130 are the first and last print nozzles in the X direction of the print nozzles 130. Figure 6 However, after a nozzle malfunction occurs, the starting and ending printheads 130 may be positioned in the middle of the X-direction of the printhead 130. In this case, to better control the printhead 130 during printing, it is necessary to prevent spraying from the nozzles between the starting and ending printheads 130. To ensure these operations are executed accurately, it is necessary to use bottom and top offsets to fill in the basic printed quadrilateral shape into a rectangle (e.g., ...). Figure 7 As shown in the figure, this ensures that no ink is sprayed from the nozzles when the initial printing nozzles have not entered above the cylindrical cell 200, and that no ink is sprayed from the nozzles when the final printing nozzle 130 moves out of the cell.

[0083] The above method of completing the basic printed quadrilateral shape into a rectangle can be used as a reference. Figure 7 As shown, Figure 7 In the diagram, Image_W1 is the target printing width, Δ2 is the top compensation offset, and Δ1 is the bottom compensation offset. By using two sets of top and bottom compensation offsets, the basic printing quadrilateral shape can be completed.

[0084] In some implementations, the basic printing rectangle can also be understood as a selection box. That is, for the graphic that still needs to be printed on the side of the cylindrical cell, it can be arranged within the range constrained by the basic printing rectangle. Then, offset operations and filling operations can be performed using the bottom offset and top offset of the graphic to obtain the final target printing graphic that can be printed by the printing device.

[0085] In some embodiments, the target print pattern is spirally printed onto the side of the cylindrical battery cell 200 using the nozzles between the starting and ending print nozzles within the print head 130, including:

[0086] Control the cylindrical battery cell 200 to rotate around its own central axis;

[0087] Control the print head 130 to move along the central axis of the cylindrical battery cell 200;

[0088] Inkjet printing begins when any nozzle between the start and end of the printhead 130 enters above the side of the cylindrical cell 200.

[0089] Stop inkjet printing while the target graphic is spirally printed onto the side of the cylindrical cell 200.

[0090] In this embodiment, based on the target printed graphic, the cylindrical battery cell 200 rotates around the central axis and the print head 130 moves along the central axis. Combined with the timing control of "ink spraying when the nozzle enters the upper side of the battery cell and stopping ink spraying when the graphic printing is completed", ink spraying from the starting print nozzle to the ending print nozzle can be precisely called to perform spiral printing, so as to achieve insulation printing on the side of the cylindrical battery cell 200.

[0091] In some embodiments, the rotational speed of the cylindrical battery cell 200 about its own central axis and the moving speed of the print head 130 along the central axis of the cylindrical battery cell 200 are constrained by the following formula:

[0092] M = (H / Ls) × R;

[0093] In the formula, M is the moving speed, R is the rotation speed, Ls is the actual printing length between the starting and ending printing nozzles, and H is the battery cell height.

[0094] The above constraint formula gives the constraint relationship between the rotation speed of the cylindrical battery cell 200 and the moving speed of the print head 130, so that the moving speed and rotation can be better matched. In addition, the ink jetting of the nozzle can be controlled by the target printing pattern to achieve the purpose of spiral printing the target printing pattern onto the side of the cylindrical battery cell 200.

[0095] In some implementations, the rotational speed R is constrained by the following formula:

[0096] R = 360° / T;

[0097] In the formula, T is the rotation period.

[0098] The above T is constrained by the following formula:

[0099] T = (D × π) / V;

[0100] In the formula, V is the preset printing speed.

[0101] In this embodiment, through the above constraint formula, it can be clearly seen that there is a negative correlation between the rotation speed and the cell diameter. That is, the larger the cell diameter, the slower the rotation speed needs to be so that the target printed pattern can be printed on the side of the cylindrical cell as expected.

[0102] In some implementations, the rotation speed R can be preset if it can be set directly.

[0103] In some implementations, the bottom offset of the graphic is determined based on the first offset length and the theoretical printing length, including:

[0104] The basic printing offset is determined based on the cell height, cell diameter, and theoretical printing length. The basic printing offset is positively correlated with the ratio of cell height to cell diameter and negatively correlated with the theoretical printing length.

[0105] The bottom offset of the graphic is determined based on the first offset length, the theoretical printing length, and the basic printing offset. The bottom offset of the graphic is negatively correlated with the ratio of the first offset length to the theoretical printing length and positively correlated with the basic printing offset.

[0106] The above-mentioned basic print offset is constrained by the following formula:

[0107] Δ=((K × L) / 25.4)×DPI_X;

[0108] In the formula, Δ is the basic printing offset, K is the ratio of cell height to cell diameter, i.e., cell aspect ratio, L is the theoretical printing length, and DPI_X is the printing resolution.

[0109] The bottom offset of the above graphic is constrained by the following formula:

[0110] Δ1 = (L_Start / L) × Δ;

[0111] In the formula, Δ1 is the bottom offset of the graphic, and L_Start is the first offset length.

[0112] In some implementations, the top offset of the graphic is determined based on the second offset length and the theoretical print length, including:

[0113] The basic printing offset is determined based on the cell height, cell diameter, and theoretical printing length. The basic printing offset is positively correlated with the ratio of cell height to cell diameter and negatively correlated with the theoretical printing length.

[0114] The top offset of the graphic is determined based on the second offset length, the theoretical print length, and the basic print offset. The top offset of the graphic is negatively correlated with the ratio of the second offset length to the theoretical print length and positively correlated with the basic print offset.

[0115] The basic print offset mentioned above has already been described and will not be repeated here.

[0116] The top offset of the above figure is constrained by the following formula:

[0117] Δ2 = (L_End / L) × Δ;

[0118] In the formula, Δ2 is the bottom offset of the graphic, and L_End is the second offset length.

[0119] In some implementations, the basic printing offset is determined based on the cell height, cell diameter, and theoretical printing length, including:

[0120] The aspect ratio of the battery cell is determined based on the cell height and cell diameter.

[0121] The basic printing offset is determined based on the cell aspect ratio, theoretical printing length, and printing resolution. The basic printing offset is negatively correlated with the theoretical printing length and positively correlated with the cell aspect ratio.

[0122] The formula constraints for the basic print offset mentioned above have already been explained and will not be repeated here.

[0123] The cylindrical battery cell printing method provided in this application can be executed by a cylindrical battery cell printing device. This application uses a cylindrical battery cell printing device to execute the cylindrical battery cell printing method as an example to illustrate the cylindrical battery cell printing device provided in this application.

[0124] This application embodiment also provides a cylindrical battery cell printing device, including:

[0125] The parameter acquisition module is used to acquire the cell height and cell diameter of the cylindrical battery cell, as well as the printing resolution of the print head in the X direction, the print head resolution in the Y direction, and the theoretical printing length in the X direction.

[0126] The printhead offset determination module is used to determine the first offset length of the starting printhead nozzle from the first nozzle in the X direction, and the second offset length of the ending printhead nozzle from the first nozzle in the X direction.

[0127] The bottom offset determination module is used to determine the bottom offset of the graphic based on the first offset length and the theoretical printing length;

[0128] The top offset determination module is used to determine the top offset of the graphic based on the second offset length and the theoretical printing length;

[0129] A print width determination module is used to determine the target print width based on the cell height and the print resolution;

[0130] A printing height determination module is used to determine the target printing height based on the cell diameter and the printhead resolution;

[0131] The print graphic determination module is used to determine the target print graphic based on the target print width, the bottom offset of the graphic, the top offset of the graphic, and the target print height;

[0132] The printing execution control module is used to use the nozzles between the starting printing nozzle and the ending printing nozzle in the print head to spirally print the target print pattern onto the side of the cylindrical battery cell, wherein the target print pattern, after printing is completed, forms a cover over the side of the cylindrical battery cell.

[0133] The cylindrical cell printing device in this application embodiment can be an electronic device or a component of an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device, augmented reality (AR) / virtual reality (VR) device, robot, wearable device, super mobile personal computer, netbook, or personal digital assistant, etc. It can also be a server, network attached storage, personal computer, television, ATM, or self-service machine, etc. This application embodiment does not specifically limit the device.

[0134] This application also provides an electronic device, including: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the cylindrical cell printing method as described above. The source table provided in this application can implement each process of the above-described cylindrical cell printing method embodiment and achieve the same beneficial effects; to avoid repetition, it will not be described again here.

[0135] This application also provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or control module, causing the processor to perform the cylindrical cell printing method described in the above embodiments, for example, the method described above.

[0136] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0137] The functional blocks shown in the above structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM, floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0138] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0139] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus, and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0140] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A cylindrical cell printing method, characterized by, The application comprises: acquiring the cell height and cell diameter of a cylindrical cell, and the printing resolution of a printing head in the X direction, the nozzle resolution of the printing head in the Y direction, and the theoretical printing length in the X direction; determining the first offset length of the starting printing nozzle of the printing head in the X direction from the first nozzle, and the second offset length of the ending printing nozzle of the printing head in the X direction from the first nozzle; determining the bottom offset of the pattern according to the first offset length and the theoretical printing length; determining the top offset of the pattern according to the second offset length and the theoretical printing length; determining the target printing width according to the cell height and the printing resolution; determining the target printing height according to the cell diameter and the nozzle resolution; determining the target printing pattern according to the target printing width, the bottom offset of the pattern, the top offset of the pattern, and the target printing height; spiral printing the target printing pattern to the side of the cylindrical cell by using the nozzles between the starting printing nozzle and the ending printing nozzle in the printing head, wherein the target printing pattern forms coverage to the side of the cylindrical cell after being completely printed; the order of the starting printing nozzle and the order of the ending printing nozzle are determined by the following steps: printing a detection pattern by using all the nozzles of the printing head; determining the order of the starting printing nozzle and the order of the ending printing nozzle according to the distortion state in the detection pattern, wherein the starting printing nozzle and the ending printing nozzle are used to jointly restrict a region of no-fault printing nozzles.

2. The cylindrical cell printing method of claim 1, wherein, determining the target printing pattern according to the target printing width, the bottom offset of the pattern, the top offset of the pattern, and the target printing height comprises: determining a basic printing rectangular pattern according to the target printing width and the target printing height; performing offset operation on the top edge of the basic printing rectangular pattern according to the top offset of the pattern, and performing offset operation on the bottom edge of the basic printing rectangular pattern according to the bottom offset of the pattern, to obtain a basic printing quadrilateral pattern; complementing the basic printing quadrilateral pattern to a rectangle by using the bottom offset of the pattern and the top offset of the pattern, to obtain the target printing pattern, wherein the basic printing quadrilateral pattern forms coverage to the side of the cylindrical cell in the case of spiral printing the target printing pattern to the side of the cylindrical cell.

3. The cylindrical cell printing method of claim 1, wherein, the spiral printing of the target printing pattern to the side of the cylindrical cell by using the nozzles between the starting printing nozzle and the ending printing nozzle in the printing head comprises: controlling the cylindrical cell to rotate around the central axis of the cylindrical cell; controlling the printing head to move along the central axis of the cylindrical cell; starting to eject ink in the case that any nozzle between the starting printing nozzle and the ending printing nozzle in the printing head enters above the side of the cylindrical cell; stopping to eject ink in the case of spiral printing the target printing pattern to the side of the cylindrical cell.

4. The cylindrical cell printing method of claim 1, wherein, The rotating speed of the cylindrical battery cell rotating around its central axis and the moving speed of the printing nozzle moving along the central axis of the cylindrical battery cell are constrained by the following formula: M=H / Ls×R; In the formula, M is the moving speed, R is the rotating speed, Ls is the actual printing length between the starting printing nozzle and the ending printing nozzle, and H is the height of the battery cell.

5. The cylindrical cell printing method of claim 1, wherein, The determining of the pattern bottom offset according to the first offset length and the theoretical printing length comprises: determining a basic printing offset according to the height of the battery cell, the diameter of the battery cell, and the theoretical printing length, wherein the basic printing offset is positively correlated with the ratio of the height of the battery cell and the diameter of the battery cell, and is negatively correlated with the theoretical printing length; determining the pattern bottom offset according to the first offset length, the theoretical printing length, and the basic printing offset, wherein the pattern bottom offset is negatively correlated with the ratio of the first offset length and the theoretical printing length, and is positively correlated with the basic printing offset.

6. The cylindrical cell printing method of claim 1, wherein, The determining of the pattern top offset according to the second offset length and the theoretical printing length comprises: determining a basic printing offset according to the height of the battery cell, the diameter of the battery cell, and the theoretical printing length, wherein the basic printing offset is positively correlated with the ratio of the height of the battery cell and the diameter of the battery cell, and is negatively correlated with the theoretical printing length; determining the pattern top offset according to the second offset length, the theoretical printing length, and the basic printing offset, wherein the pattern top offset is negatively correlated with the ratio of the second offset length and the theoretical printing length, and is positively correlated with the basic printing offset.

7. The cylindrical cell printing method of claim 1, wherein, The determining of the basic printing offset according to the height of the battery cell, the diameter of the battery cell, and the theoretical printing length comprises: determining a battery cell aspect ratio according to the height of the battery cell and the diameter of the battery cell; determining a basic printing offset according to the battery cell aspect ratio, the theoretical printing length, and the printing resolution, wherein the basic printing offset is negatively correlated with the theoretical printing length, and is positively correlated with the battery cell aspect ratio.

8. A cylindrical cell printing apparatus, characterized by, The cylindrical battery cell printing device comprises: a parameter acquisition module configured to acquire the height of the battery cell, the diameter of the battery cell, the printing resolution of the printing nozzle in the X direction, the nozzle resolution of the printing nozzle in the Y direction, and the theoretical printing length of the printing nozzle in the X direction; a nozzle offset determination module configured to determine a first offset length of a starting printing nozzle of the printing nozzle in the X direction from a first nozzle, and a second offset length of an ending printing nozzle of the printing nozzle in the X direction from the first nozzle; a bottom offset determination module configured to determine a pattern bottom offset according to the first offset length and the theoretical printing length; a top offset determination module configured to determine a pattern top offset according to the second offset length and the theoretical printing length; a printing width determination module configured to determine a target printing width according to the height of the battery cell and the printing resolution; a printing height determination module configured to determine a target printing height according to the diameter of the battery cell and the nozzle resolution; and a printing device configured to print a pattern on the cylindrical battery cell according to the target printing width, the target printing height, the first nozzle, and the second nozzle. The printing pattern determination module is configured to determine a target printing pattern according to the target printing width, the pattern bottom offset, the pattern top offset, and the target printing height. The printing execution control module is configured to print the target printing pattern to the side surface of the cylindrical battery cell by using the printing nozzles between the starting printing nozzle and the ending printing nozzle in the printing head, and the target printing pattern forms a cover on the side surface of the cylindrical battery cell after being printed. The position of the starting printing nozzle and the position of the ending printing nozzle are determined by the following steps: A detection pattern is printed by using all the nozzles of the printing head. The position of the starting printing nozzle and the position of the ending printing nozzle are determined according to the distortion state of the detection pattern, and the starting printing nozzle and the ending printing nozzle are used to jointly define a region of printing nozzles without failure.

9. An electronic device, comprising: The electronic device comprises a processor and a memory storing computer program instructions. The processor executes the computer program to implement the cylindrical battery cell printing method in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions for causing a computer to execute the cylindrical battery cell printing method in any one of claims 1 to 7.

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