Cylindrical battery cell spiral printing method, device, equipment and medium

Abstract

The application discloses a cylindrical battery cell spiral printing method, device, equipment and medium, aiming at the rotation offset of the top end of the head triangular area and the bottom edge of the tail triangular area in the rotation direction, the translation offset of the splicing part in the height direction is respectively regulated, the error source is accurately positioned and adjusted, the possibility of gap or overlap of the printing track is reduced, and then the unqualified situation of the cylindrical battery cell side insulation caused by various errors in the cylindrical battery cell side insulation spiral printing process is effectively reduced. Meanwhile, the compensation coefficient calculation relies on the structure parameters of the battery cell diameter, height and the like, does not need to depend on complex printing control card parameters, can effectively reduce the operation and control difficulty, can realize speed self-adaptive adjustment without high-precision mechanical debugging, shortens the equipment debugging period, improves the production stability and printing efficiency, and reduces the production and operation cost.

Description

Technical Field

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

[0002] In the production process of cylindrical battery cells, insulating ink needs to be precisely printed on the sides of the cells using a printhead to ensure their insulation performance. When using a spiral printing method for the insulation of cylindrical battery cells, the installation accuracy deviation and cumulative error of the printhead, as well as the installation accuracy deviation and cumulative error of the rotating structure that drives the cylindrical battery cell, will directly affect the accuracy of the printing trajectory. Especially after the equipment has been running continuously for a long time, these errors will continue to accumulate, which can easily lead to gaps or overlaps in the spiral printing trajectory, ultimately resulting in the battery cell's insulation performance failing to meet standards. Summary of the Invention

[0003] This application aims to provide a method, apparatus, equipment, and medium for spiral printing insulation on cylindrical battery cells, which can effectively reduce insulation defects caused by factors such as installation errors and cumulative operational errors during the spiral printing process of insulation on the side of cylindrical battery cells.

[0004] Spiral printing of cylindrical battery cells according to a first aspect embodiment of this application includes:

[0005] Obtain the cell diameter and cell height of the cylindrical battery cell;

[0006] Obtain the rotational offset of the top edge of the head triangle region and the bottom edge of the tail triangle region of the target printed pattern spirally printed on the side of the cylindrical battery cell in the rotational direction of the cylindrical battery cell.

[0007] A rotation compensation coefficient is determined based on the rotational offset and the cell diameter, and the rotation compensation coefficient is positively correlated with the rotational offset.

[0008] The rotation speed of the cylindrical battery cell is adjusted according to the rotation compensation coefficient so that the rotational offset is within a preset rotational deviation range.

[0009] Obtain the translational offset at the splicing point of the target printed pattern in the height direction of the cylindrical battery cell;

[0010] Based on the translation offset and the cell height, a translation compensation coefficient is determined, wherein the translation compensation coefficient is positively correlated with the translation offset;

[0011] The translation speed of the print head along the axis of the cylindrical battery cell is adjusted according to the translation compensation coefficient so that the translation offset is within a preset translation deviation range.

[0012] The cylindrical battery cell spiral printing apparatus according to a second aspect embodiment of this application includes:

[0013] The parameter acquisition module is used to obtain the cell diameter and cell height of the cylindrical battery cell;

[0014] The first offset acquisition module is used to acquire the rotational offset of the top edge of the head triangle region and the bottom edge of the tail triangle region of the target printed pattern spirally printed on the side of the cylindrical battery cell in the rotational direction of the cylindrical battery cell.

[0015] The first compensation determination module is used to determine a rotation compensation coefficient based on the rotational offset and the cell diameter, wherein the rotation compensation coefficient is positively correlated with the rotational offset.

[0016] The rotation speed adjustment module is used to adjust the rotation speed of the cylindrical battery cell according to the rotation compensation coefficient so that the rotational offset is within a preset rotational deviation range.

[0017] The second offset acquisition module is used to acquire the translational offset of the splicing point of the target printed pattern in the height direction of the cylindrical battery cell;

[0018] The second compensation determination module is used to determine the translation compensation coefficient based on the translation offset and the cell height, wherein the translation compensation coefficient is positively correlated with the translation offset;

[0019] The speed adjustment module is used to adjust the translation speed of the print head along the axis of the cylindrical battery cell according to the translation compensation coefficient, so that the translation offset is within a preset translation deviation range.

[0020] An electronic device according to a third aspect of this application includes: a processor and a memory storing computer program instructions;

[0021] When the processor executes computer program instructions, it implements the cylindrical cell spiral printing method as described in the first aspect embodiment.

[0022] A computer-readable storage medium according to a fourth aspect of this application stores computer-executable instructions for performing the cylindrical cell spiral printing method as described in the first aspect of the present application.

[0023] The cylindrical battery cell spiral printing method, apparatus, equipment, and medium of this application embodiment respectively control the rotational offset of the top of the head triangle region and the bottom of the tail triangle region in the rotational direction, and the translational offset at the splicing point in the height direction. This precisely locates and adjusts the source of error, reducing the possibility of gaps or overlaps in the printing trajectory. This effectively reduces the occurrence of substandard side insulation of the cylindrical battery cell due to various errors during the spiral printing process. Simultaneously, the compensation coefficient calculation relies on the cell's own structural parameters such as diameter and height, without depending on complex printing control card parameters. This effectively reduces the difficulty of operation and control, and allows for adaptive speed adjustment without high-precision mechanical debugging. This shortens the equipment debugging cycle while improving production stability and printing efficiency, and reducing production and maintenance costs.

[0024] 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

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the printing device according to an embodiment of this application;

[0027] Figure 2 A schematic diagram of a printing device performing spiral printing according to an embodiment of this application;

[0028] Figure 3 This is a flowchart of the cylindrical battery cell spiral printing method according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram showing the dimensions of a cylindrical battery cell according to an embodiment of this application;

[0030] Figure 5 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;

[0031] Figure 6 This is a schematic diagram of the cylindrical battery cell spiral printing method according to an embodiment of this application during normal spiral printing.

[0032] Figure 7 This is a schematic diagram illustrating an abnormal spiral printing rotation speed in the cylindrical battery cell spiral printing method according to an embodiment of this application.

[0033] Figure 8 This is a schematic diagram illustrating an abnormal translational speed during the spiral printing of a cylindrical battery cell according to an embodiment of this application.

[0034] Figure 9This 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 spiral printing method of this application embodiment;

[0035] Figure 10 This 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 spiral printing method of the cylindrical battery cell according to an embodiment of this application.

[0036] Figure 11 This is a diagram showing the effect of the printed detection pattern in the cylindrical battery cell printing method of this application embodiment.

[0037] Figure label:

[0038] Frame 110, rotating structure 120, print head 130, cylindrical battery cell 200, head triangular area 310, tail triangular area 320. 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 spiral printing method, apparatus, device, and medium of the embodiments of this application, a printing device is proposed herein, with reference to... Figure 1 , Figure 2 The 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 spiral printing method, apparatus, device, and medium of the present 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 the present application and should not be regarded as a limitation on the scope of protection of the present application.

[0046] like Figure 3 As shown, Figure 3 This is a flowchart of a cylindrical battery cell spiral printing method according to an embodiment of the present application. The cylindrical battery cell spiral printing method is applied to a control unit and includes steps S100 to S700.

[0047] Step S100: Obtain the cell diameter and cell height of the cylindrical cell 200;

[0048] Step S200: Obtain the rotational offset of the top of the head triangle region 310 and the bottom of the tail triangle region 320 of the target printed pattern spirally printed on the side of the cylindrical cell 200 in the rotational direction of the cylindrical cell 200.

[0049] Step S300: Determine the rotation compensation coefficient based on the rotational offset and the cell diameter. The rotation compensation coefficient is positively correlated with the rotational offset.

[0050] Step S400: Adjust the rotation speed of the cylindrical cell 200 according to the rotation compensation coefficient so that the rotation offset is within the preset rotation deviation range.

[0051] Step S500: Obtain the translational offset of the splicing point of the target printed pattern in the height direction of the cylindrical cell 200;

[0052] Step S600: Determine the translation compensation coefficient based on the translation offset and cell height. The translation compensation coefficient is positively correlated with the translation offset.

[0053] In step S700, the translation speed of the print head 130 along the axis of the cylindrical cell 200 is adjusted according to the translation compensation coefficient so that the translation offset is within the preset translation deviation range.

[0054] In this embodiment, the rotational offset of the top of the head triangular region 310 and the bottom edge of the tail triangular region 320 in the rotational direction, and the translational offset at the splicing point in the height direction are adjusted separately to accurately locate and adjust the source of error, reducing the possibility of gaps or overlaps in the printing trajectory. This effectively reduces the occurrence of unqualified side insulation of the cylindrical battery cell 200 due to various errors during the spiral printing process of the side insulation of the cylindrical battery cell 200. At the same time, the compensation coefficient calculation relies on the cell's own structural parameters such as diameter and height, without relying on complex printing control card parameters. This effectively reduces the difficulty of operation and control, and enables adaptive speed adjustment without high-precision mechanical debugging. This shortens the equipment debugging cycle, improves production stability and printing efficiency, and reduces production and maintenance costs.

[0055] The aforementioned triangular region 310 at the head can be understood as the pattern formed when the nozzles of the print head 130 gradually enter the upper part of the battery cell and begin printing, corresponding to the actual printing length of the print head. Figures 6 to 8 As shown in the left-hand triangular area, the nozzles corresponding to the actual printing length gradually enter the top of the battery cell. Therefore, the printable width on the side of the battery cell gradually increases. At the same time, because the battery cell rotates around its own central axis, a triangular area is formed. After all the nozzles corresponding to the actual printing length of the print head 130 have entered the top of the battery cell, there will be no further change in the printing width. This can be considered as the end of printing in the head triangular area 310.

[0056] The aforementioned tail triangular region 320 can be understood as the pattern printed by the print head 130 as the nozzles, corresponding to the actual printing length of the print head 130, gradually exit above the battery cell along the central axis. Figures 6 to 8 As shown in the right-hand triangular area, the nozzles for the actual printing length gradually exit above the battery cell, thus gradually reducing the printable width on the side of the battery cell. At the same time, because the battery cell rotates around its own central axis, a triangular area opposite to the head triangular area 310 is formed. After all the nozzles corresponding to the actual printing length of the print head 130 have exited above the battery cell, there are no nozzles above the battery cell, and the side printing is completed. This can be considered as the end of the printing of the tail triangular area 320.

[0057] Understandably, in an ideal situation, such as Figure 6As shown, the vertices of the head triangle region 310 and the base of the tail triangle region 320 will align, or in other words, after the tail triangle region 320 is translated along the central axis of the battery cell, the two triangles can form a rectangle. However, once rotational offset occurs, such as Figure 7 As shown, this will cause the vertices of the head triangle region and the bottom edge of the tail triangle region to no longer be aligned. Conversely, the relative positional relationship between the vertices of the head triangle region and the bottom edge of the tail triangle region can be used to determine the rotation offset. The rotation offset can be referenced in the figure as ΔM_R.

[0058] If all nozzles of the print head 130 participate in inkjet printing, the actual printing length can be understood as the maximum printing length of the print head 130, i.e., the theoretical printing length. However, in actual printing, there may be some nozzle malfunctions. If printing needs to continue, it is necessary to use the nozzles in the continuous area without malfunctions to print. In this case, the actual printing length will be less than the theoretical printing length.

[0059] The aforementioned rotational compensation coefficient can be understood as a correction parameter used to correct the rotational speed, ensuring that the rotational offset is within a preset rotational deviation range.

[0060] The aforementioned target printed pattern is spirally printed onto the side of the cylindrical cell 200. Therefore, after the spiral printing is completed, there will inevitably be a splicing area. This splicing area will also experience problems due to mismatched printing speeds, such as... Figure 8 As shown, this results in a translational offset ΔM_M, and the more significant the gap or overlap at the splicing point, the greater the corresponding translational offset.

[0061] The aforementioned translation compensation coefficient can be understood as a correction parameter used to correct the translation speed, so that the translation offset is within the preset translation deviation range.

[0062] The aforementioned rotational and translational offsets can be measured manually by stopping the printing equipment if a problem is detected. Alternatively, if an image acquisition device is installed, the speed of the acquired images can be used for periodic detection. Once a rotational or translational offset occurs, the corresponding adjustment operation can be performed.

[0063] In some implementations, the translation speed is initialized using the following steps:

[0064] Obtain the actual printing length of print head 130;

[0065] The translation speed is determined based on the pre-obtained rotation speed and the ratio of the cell height to the actual printed length. The translation speed is positively correlated with both the ratio and the rotation speed.

[0066] In this embodiment, the initialization process of translation speed and the correlation between rotation speed and translation speed are given, so that the rotation speed and translation speed for effectively implementing the spiral printing target pattern can be obtained, thereby achieving effective insulation coverage of the side of the cylindrical cell 200.

[0067] The aforementioned rotation speed can be obtained by direct preset.

[0068] The constraint formula for initializing the translational velocity mentioned above can be referenced as follows:

[0069] ;

[0070] In the formula, V_M is the translational speed, V_R is the rotational speed, H is the cell height, and Ls is the actual printed length.

[0071] In some implementations, the rotational speed is obtained in advance through the following steps:

[0072] The rotation cycle is determined based on the cell diameter and the preset printing speed;

[0073] The rotation speed is determined based on the pre-obtained cell rotation cycle.

[0074] In this embodiment, taking into account the characteristics of general printing equipment, the cell rotation cycle is determined by using a preset printing speed, and the rotation speed is further determined, so as to adapt to the printing settings requirements of ordinary printing equipment and reduce the difficulty of operation.

[0075] When performing printing, the aforementioned ordinary printing equipment typically uses a method of inputting a target print pattern and then controlling the ink jet from the nozzles based on the input target print pattern.

[0076] The constraint formula for initializing the rotation period mentioned above can be referenced as follows:

[0077] ;

[0078] In the formula, V_S is the preset printing speed, T is the rotation period, and D is the cell diameter.

[0079] The constraint formula for initializing the rotational speed mentioned above can be referenced as follows:

[0080] V_R = 360 ° / T.

[0081] In some implementations, a rotation compensation coefficient is determined based on the rotational offset and the cell diameter. This rotation compensation coefficient is positively correlated with the rotational offset. Examples include:

[0082] Determine the absolute value of the rotation offset;

[0083] The first deviation value is determined based on the absolute value of the rotation offset and the first offset flag value. Specifically, the first offset flag value is -1 when the vertex of the head triangle region 310 exceeds the bottom edge of the tail triangle region 320, the first offset flag value is 0 when the vertex of the head triangle region 310 and the bottom edge of the tail triangle region 320 are aligned, and the first offset flag value is 1 when the vertex of the head triangle region 310 does not exceed the bottom edge of the tail triangle region 320.

[0084] The rotation compensation coefficient is obtained by dividing the first deviation value by the circumference of the bottom surface of the cylindrical cell 200. The circumference of the bottom surface of the cylindrical cell 200 is calculated based on the diameter of the cylindrical cell 200.

[0085] The absolute value of the aforementioned rotational offset can be obtained directly by measuring the distance from the top of the head triangle region 310 to the bottom of the tail triangle region 320.

[0086] The aforementioned first offset flag value can determine the specific offset direction in order to obtain a rotation compensation coefficient that reflects the direction.

[0087] The above rotational compensation coefficient can be constrained by the following formula:

[0088] ;

[0089] ;

[0090] In the formula, |ΔM_R| is the absolute value of the rotational offset, m1 is the first offset flag value, M_R is the first deviation value, and K1 is the rotational compensation coefficient.

[0091] In some embodiments, the rotational speed of the cylindrical cell 200 is adjusted according to a rotational compensation coefficient, including:

[0092] The rotational speed compensation value is obtained based on the rotational compensation coefficient and the rotational speed of the cylindrical cell 200 after the previous adjustment.

[0093] The adjusted rotational speed of the cylindrical cell 200 is obtained by adding the speed compensation value with the previously adjusted rotational speed of the cylindrical cell 200.

[0094] The aforementioned rotational compensation coefficient can be used as the adjustment ratio for the rotational speed of the previously adjusted cylindrical cell 200, thereby determining the rotational speed compensation value. The adjusted rotational speed of the cylindrical cell 200 can then be obtained by adding the rotational speed compensation value to the rotational speed of the previously adjusted cylindrical cell 200, thus achieving new rotational control.

[0095] The rotational speed of the cylindrical battery cell 200 after this adjustment can be constrained by the following formula:

[0096] ;

[0097] V_R_New = V_R + ΔV_R;

[0098] In the formula, V_R is the rotational speed of the cylindrical cell 200 after the previous adjustment, ΔV_R is the speed compensation value, and V_R_New is the rotational speed of the cylindrical cell 200 after the current adjustment.

[0099] In some implementations, a translation compensation coefficient is determined based on the translation offset and the cell height. This translation compensation coefficient is positively correlated with the translation offset, including:

[0100] Determine the absolute value of the translation offset;

[0101] The second deviation value is determined based on the absolute value of the translation offset and the second offset flag value. Specifically, the second offset flag value is -1 when the splicing points of the target printed graphics in the height direction of the cylindrical cell 200 coincide, the second offset flag value is 0 when the splicing points of the target printed graphics in the height direction of the cylindrical cell 200 are aligned, and the second offset flag value is 1 when the splicing points of the target printed graphics in the height direction of the cylindrical cell 200 do not coincide.

[0102] The translation compensation coefficient is obtained by dividing the second deviation value by the cell height.

[0103] The absolute value of the aforementioned translation offset can be obtained directly from the gap width at the joint or the width of the overlapping area.

[0104] The aforementioned second offset flag value can determine the specific offset direction in order to obtain a translation compensation coefficient that reflects the direction.

[0105] The above translation compensation coefficients can be constrained by the following formula:

[0106] ;

[0107] K2 = M_M / H;

[0108] In the formula, |ΔM_M| is the absolute value of the translation offset, m2 is the second offset flag value, M_M is the second deviation value, and K2 is the translation compensation coefficient.

[0109] In some embodiments, the translational speed of the printhead 130 along the axis of the cylindrical cell 200 is adjusted according to a translational compensation coefficient, including:

[0110] The translation compensation value is obtained based on the translation compensation coefficient and the translation speed of the print head 130 after the previous adjustment.

[0111] The adjusted translation speed of the print head 130 is obtained by adding the translation compensation value with the translation speed of the previously adjusted print head 130.

[0112] The aforementioned translation compensation coefficient can be used as an adjustment ratio for the translation speed of the previously adjusted print head 130, thereby determining the translation compensation value. The translation compensation value can then be added to the translation speed of the previously adjusted print head 130 to obtain the adjusted translation speed of the print head 130, thus achieving new translation control of the print head 130.

[0113] The translation speed of the print head 130 after this adjustment can be constrained by the following formula:

[0114] ;

[0115] V_R_New = V_M + ΔV_M;

[0116] In the formula, V_M is the translation speed of the print head 130 after the previous adjustment, ΔV_M is the translation compensation value, and V_M_New is the translation speed of the print head 130 after the current adjustment.

[0117] The above-mentioned cylindrical cell spiral printing method, before step S200, further includes:

[0118] Obtain the cell height and cell diameter of the cylindrical battery 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;

[0119] Determine the first offset length of the starting print nozzle from the first nozzle and the second offset length of the ending print nozzle from the first nozzle in the X direction of the print head 130.

[0120] Determine the bottom offset of the graphic based on the first offset length and the theoretical printing length;

[0121] Determine the top offset of the graphic based on the second offset length and the theoretical print length;

[0122] Determine the target printing width based on the cell height and printing resolution;

[0123] Determine the target printing height based on the battery cell diameter and printhead resolution;

[0124] The target print graphic is determined based on the target print width, bottom offset of the graphic, top offset of the graphic, and target print height.

[0125] Using the nozzles between the starting and ending printing nozzles within the print head 130, the target print pattern is spirally printed onto the side of the cylindrical battery cell 200. After the target print pattern is printed, it forms a cover over the side of the cylindrical battery cell 200.

[0126] In this application, the target printable pattern is constrained into a parallelogram, making it possible to spirally print the target printable pattern to the side of the cylindrical battery cell 200. Furthermore, the starting and ending printable nozzles can be used to constrain the section of the print head 130 that is free from nozzle malfunctions. Spiral printing is then performed based on the target printable pattern to cover the side of the cylindrical battery 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 battery cell 200); conventional equipment can complete the printing. Furthermore, this embodiment can also be used to print large cylindrical battery cells 200.

[0127] The X direction mentioned above can be understood as the direction of nozzle movement.

[0128] 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.

[0129] The above printing resolution and printhead resolution are preset parameters that can be manually determined in advance.

[0130] The theoretical printing length mentioned above can be understood as the printing length in the X direction of the two-dimensionally distributed nozzles in the print head 130 under the condition that all nozzles are fault-free. Specifically, each nozzle can correspond to a printing pixel. The theoretical printing length can be understood as the sum of the lengths of the printing pixels obtained by all nozzles in the X direction being printed synchronously under the condition that all nozzles are fault-free.

[0131] Each of the aforementioned nozzles corresponds to a printing pixel. Simultaneously, the positions of the starting and ending printing nozzles in the X-direction can be determined. This allows for the rapid determination of the first and second offset lengths using the nozzle positions and the space occupied by the printing pixels. In some implementations, the distance from each nozzle to the first and second nozzles can be predetermined and stored in the control unit. Therefore, after determining the positions of the starting and ending printing nozzles, the corresponding offset lengths can be directly obtained by looking up a table.

[0132] 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.

[0133] The above-mentioned side view of the cylindrical battery cell 200 can be used as a reference. Figure 4 , Figure 5 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 9 to 10 The target printed graphic is a basic printed quadrilateral shape (e.g.) Figure 9 , Figure 10 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.

[0134] 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 9 , Figure 10 As shown, Figure 9 , Figure 10 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.

[0135] 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:

[0136] Print the inspection pattern using all the nozzles of print head 130;

[0137] Based on the distortion state in the detected pattern, determine the position of the starting and ending print nozzles.

[0138] When the printed detection image is distorted, such as Figure 11 As shown, there are obvious abnormalities (such as...). Figure 11 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 state between the starting and ending printing nozzles.

[0139] In some implementations, the target print width is constrained by the following formula:

[0140] ;

[0141] In the formula, Image_W1 is the target printing width, H is the cell height, and DPI_X is the printing resolution;

[0142] The target print height is determined by the following formula:

[0143] ;

[0144] In the formula, Image_H1 is the target printing height, D is the cell diameter, and DPI_Y is the printhead resolution.

[0145] 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.

[0146] 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:

[0147] Determine the basic printing rectangle shape based on the target printing width and target printing height;

[0148] 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.

[0149] 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.

[0150] The above-mentioned basic printed rectangular shape can be understood as being obtained by directly unfolding the side of the cylindrical cell 200.

[0151] The above-described offset operation, which adjusts the top edge of the base printed rectangle by an offset of Δ2, can be referenced. Figure 10 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 10 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.

[0152] 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 9 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 accurate execution of this operation, it is necessary to use bottom and top offsets to fill in the basic printed quadrilateral shape into a rectangle (e.g., ...). Figure 10 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.

[0153] The above method of completing the basic printed quadrilateral shape into a rectangle can be used as a reference. Figure 10 As shown, Figure 10 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.

[0154] 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.

[0155] In some implementations, the bottom offset of the graphic is determined based on the first offset length and the theoretical printing length, including:

[0156] 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.

[0157] 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.

[0158] The above-mentioned basic print offset is constrained by the following formula:

[0159] ;

[0160] In the formula, Δ is the basic printing offset, K3 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.

[0161] The bottom offset of the above graphic is constrained by the following formula:

[0162] ;

[0163] In the formula, Δ1 is the bottom offset of the graphic, and L_Start is the first offset length.

[0164] In some implementations, the top offset of the graphic is determined based on the second offset length and the theoretical print length, including:

[0165] 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.

[0166] 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.

[0167] The basic print offset mentioned above has already been described and will not be repeated here.

[0168] The top offset of the above figure is constrained by the following formula:

[0169] ;

[0170] In the formula, Δ2 is the bottom offset of the graphic, and L_End is the second offset length.

[0171] In some implementations, the basic printing offset is determined based on the cell height, cell diameter, and theoretical printing length, including:

[0172] The aspect ratio of the battery cell is determined based on the cell height and cell diameter.

[0173] 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.

[0174] The formula constraints for the basic print offset mentioned above have already been explained and will not be repeated here.

[0175] The cylindrical battery cell spiral printing method provided in this application can be executed by a cylindrical battery cell spiral printing device. This application uses a cylindrical battery cell spiral printing device to perform the cylindrical battery cell spiral printing method as an example to illustrate the cylindrical battery cell spiral printing device provided in this application.

[0176] This application embodiment also provides a cylindrical battery cell spiral printing device, including:

[0177] The parameter acquisition module is used to obtain the cell diameter and cell height of the cylindrical cell 200;

[0178] The first offset acquisition module is used to acquire the rotational offset of the top of the head triangle region 310 and the bottom edge of the tail triangle region 320 of the target printed pattern spirally printed on the side of the cylindrical cell 200 in the rotational direction of the cylindrical cell 200.

[0179] The first compensation determination module is used to determine the rotation compensation coefficient based on the rotational offset and the cell diameter. The rotation compensation coefficient is positively correlated with the rotational offset.

[0180] The rotation speed adjustment module is used to adjust the rotation speed of the cylindrical cell 200 according to the rotation compensation coefficient so that the rotational offset is within the preset rotational deviation range.

[0181] The second offset acquisition module is used to acquire the translational offset of the splicing point of the target printed pattern in the height direction of the cylindrical cell 200.

[0182] The second compensation determination module is used to determine the translation compensation coefficient based on the translation offset and the cell height. The translation compensation coefficient is positively correlated with the translation offset.

[0183] The speed adjustment module is used to adjust the translation speed of the print head 130 along the axis of the cylindrical cell 200 according to the translation compensation coefficient, so that the translation offset is within the preset translation deviation range.

[0184] The cylindrical battery cell spiral 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 specific implementation.

[0185] 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 spiral printing method as described above. The source table provided in this application can implement each process of the above-described cylindrical cell spiral printing method embodiment and achieve the same beneficial effects; to avoid repetition, it will not be described again here.

[0186] 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 spiral printing method described in the above embodiments, for example, the method described above.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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 spiral printing method, characterized by, The method comprises the following steps: obtaining the cell diameter and the cell height of a cylindrical cell; obtaining the rotational offset of the top end of the head triangular area and the bottom edge of the tail triangular area of a target printed pattern spirally printed on the side surface of the cylindrical cell in the rotating direction of the cylindrical cell; determining a rotational compensation coefficient according to the rotational offset and the cell diameter, wherein the rotational compensation coefficient is positively correlated with the rotational offset; adjusting the rotating speed of the cylindrical cell according to the rotational compensation coefficient, so that the rotational offset is within a preset rotational deviation range; obtaining the translational offset of the splicing position of the target printed pattern in the height direction of the cylindrical cell; determining a translational compensation coefficient according to the translational offset and the cell height, wherein the translational compensation coefficient is positively correlated with the translational offset; adjusting the translational speed of the printing nozzle along the axis of the cylindrical cell according to the translational compensation coefficient, so that the translational offset is within a preset translational deviation range.

2. The cylindrical cell spiral printing method of claim 1, wherein, The translational speed is initialized by the following steps: obtaining the actual printing length of the printing nozzle; determining the translational speed according to the pre-obtained rotating speed and the ratio of the cell height to the actual printing length, wherein the translational speed is positively correlated with both the ratio and the rotating speed.

3. The cylindrical cell spiral printing method of claim 1, wherein, The rotating speed is pre-obtained by the following steps: determining the rotating period according to the cell diameter and a preset printing speed; determining the rotating speed according to the pre-obtained cell rotating period.

4. The cylindrical cell spiral printing method of claim 1, wherein, The method of determining the rotational compensation coefficient according to the rotational offset and the cell diameter, wherein the rotational compensation coefficient is positively correlated with the rotational offset, comprises the following steps: determining the absolute value of the rotational offset; determining a first deviation value according to the absolute value of the rotational offset and a first offset flag value, wherein the first offset flag value is -1 when the top point of the head triangular area exceeds the bottom edge of the tail triangular area, the first offset flag value is 0 when the top point of the head triangular area is aligned with the bottom edge of the tail triangular area, and the first offset flag value is 1 when the top point of the head triangular area does not exceed the bottom edge of the tail triangular area; dividing the first deviation value by the circumference of the bottom surface of the cylindrical cell to obtain the rotational compensation coefficient, wherein the circumference of the bottom surface of the cylindrical cell is calculated according to the diameter of the cylindrical cell.

5. The cylindrical cell spiral printing method of claim 1 or 4, wherein, The method of adjusting the rotating speed of the cylindrical cell according to the rotational compensation coefficient comprises the following steps: obtaining a rotating speed compensation value according to the rotational compensation coefficient and the rotating speed of the cylindrical cell after the previous adjustment; performing addition operation on the rotating speed compensation value and the rotating speed of the cylindrical cell after the previous adjustment to obtain the adjusted rotating speed of the cylindrical cell.

6. The cylindrical cell spiral printing method of claim 1, wherein, The method of determining the translational compensation coefficient according to the translational offset and the cell height, wherein the translational compensation coefficient is positively correlated with the translational offset, comprises the following steps: determining the absolute value of the translational offset; determining a second deviation value according to an absolute value of the translation offset and a second offset flag value, wherein the second offset flag value is -1 in a case that the splicing of the target printed pattern in the height direction of the cylindrical battery cell coincides, the second offset flag value is 0 in a case that the splicing of the target printed pattern in the height direction of the cylindrical battery cell aligns, and the second offset flag value is 1 in a case that the splicing of the target printed pattern in the height direction of the cylindrical battery cell does not coincide; performing a division operation on the second deviation value and the battery cell height to obtain the translation compensation coefficient.

7. The cylindrical cell spiral printing method of claim 1 or 6, wherein, The adjusting of the translation speed of the printing nozzle along the axis of the cylindrical battery cell according to the translation compensation coefficient comprises: obtaining a translation compensation value according to the translation compensation coefficient and the translation speed of the printing nozzle after the previous adjustment; performing an addition operation on the translation compensation value and the translation speed of the printing nozzle after the previous adjustment to obtain the adjusted translation speed of the printing nozzle.

8. A cylindrical battery cell spiral printing apparatus, characterized by, The cylindrical battery cell spiral printing device comprises: a parameter acquisition module configured to acquire a battery cell diameter and a battery cell height of a cylindrical battery cell; a first offset acquisition module configured to acquire a rotation offset of a top end of a head triangular region and a bottom edge of a tail triangular region of a target printed pattern spirally printed on a side surface of the cylindrical battery cell in a rotation direction of the cylindrical battery cell; a first compensation determination module configured to determine a rotation compensation coefficient according to the rotation offset and the battery cell diameter, wherein the rotation compensation coefficient is positively correlated with the rotation offset; a rotation speed adjustment module configured to adjust a rotation speed of the cylindrical battery cell according to the rotation compensation coefficient, so that the rotation offset is within a preset rotation deviation range; a second offset acquisition module configured to acquire a translation offset of a splicing of the target printed pattern in a height direction of the cylindrical battery cell; a second compensation determination module configured to determine a translation compensation coefficient according to the translation offset and the battery cell height, wherein the translation compensation coefficient is positively correlated with the translation offset; a translation speed adjustment module configured to adjust a translation speed of a printing nozzle along an axis of the cylindrical battery cell according to the translation compensation coefficient, so that the translation offset is within a preset translation deviation range.

9. An electronic device, comprising: The electronic device comprises a processor and a memory storing computer program instructions; The processor, when executing the computer program, implements the cylindrical battery cell spiral printing method according to 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 spiral printing method according to any one of claims 1 to 7.

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