Battery plate overhang measurement method, device, equipment, and storage medium

Abstract

The present application provides a method, device, equipment, and storage medium for measuring an overhang of a battery plate. The method for measuring an overhang of a battery plate includes the steps of acquiring an image of a battery plate, identifying positions of a plurality of plate edges in the image, and determining a measurement value of an overhang corresponding to the image based on the positions of the plurality of plate edges, the plurality of plate edges being plate edges related to the measurement value of an overhang corresponding to the image, the position of each plate edge being identified based on an area in which each plate edge is located, and the area in which each plate edge is located is a dynamically identified area. The measurement method can improve the flexibility and adaptability of overhang measurement.

Description

[Technical Field]

[0001] The present application belongs to the technical field of battery testing, and specifically relates to a method, device, equipment, and storage medium for measuring the overhang of a battery plate. [Background technology]

[0002] A laminator is used in the stacking and molding process of batteries to combine the positive electrode, negative electrode, and separator of a battery. To determine whether the combined electrode plate meets the requirements, it is necessary to measure the dimensions of the overhang (the portion of the negative electrode plate that protrudes beyond the positive and negative electrodes in the length and width directions).

[0003] The conventional overhang measurement technique uses a straight line fitting method based on a fixed area, locating each electrode edge in the fixed area, and then determining the overhang measurement value based on the locating result of each electrode edge. This method relies on a fixed area for locating, and has poor flexibility, making it less adaptable for practical applications. Summary of the Invention

[0004] An object of the present application is to provide a method, device, equipment, and storage medium for measuring the overhang of a battery plate to improve the flexibility and adaptability of overhang measurement.

[0005] In a first aspect, the present application provides a method for measuring an overhang of a battery plate, the method comprising the steps of acquiring an image of a battery plate, identifying positions of a plurality of plate edges in the image, and determining an overhang measurement value corresponding to the image based on the positions of the plurality of plate edges, the plurality of plate edges being plate edges associated with the overhang measurement value corresponding to the image, the position of each plate edge being identified based on an area in which each of the plate edges is located, the area in which each of the plate edges is located being a dynamically identified area.

[0006] In this application, when determining the position of each plate edge associated with the overhang measurement value corresponding to an image, the determination is based on the region in which each plate edge is located, and the region in which each plate edge is located is a dynamically determined region. Compared to the prior art, the method does not employ a linear fitting method based on a fixed region, but instead determines the position of each plate edge based on a dynamically determined region. Because the region is not fixed, the position determination for each plate edge is more flexible. For example, the region in which each plate edge is located does not need to be predetermined. This method therefore improves the degree of freedom in determining the position of each plate edge, thereby improving the degree of freedom in overhang measurement. The increased degree of freedom also correspondingly improves the adaptability of overhang measurement. For example, not considering the location of a fixed region makes it more suitable for overhang measurement in more complex environments.

[0007] In one possible embodiment, the region in which each of the electrode plate edges is located is a region that is identified based on predetermined region parameter information, or is a region that is identified based on the positions of one or more electrode plate edges.

[0008] In the present application, the region in which each plate edge is located may be identified based on predetermined region parameter information, or may be identified based on the positions of one or more plate edges, allowing for more flexibility in the method of identifying the position of each plate edge.

[0009] In one possible embodiment, the image includes a first electrode plate edge and a second electrode plate edge, the region in which the first electrode plate edge is located is identified based on predetermined region parameter information, and the region in which the second electrode plate edge is located is identified based on the position of the first electrode plate edge and a first positional relationship, the first positional relationship being the positional relationship between the first electrode plate edge and the second electrode plate edge.

[0010] In the present application, for a first plate edge and a second plate edge, the region in which the first plate edge is located is identified based on predetermined region parameters, and the region in which the second plate edge is located is identified based on the position of the first plate edge and the first positional relationship, i.e., the region in which the plate edges are located can be freely identified based on the position of one plate edge, thereby improving the degree of freedom in identifying the position of the plate edges.

[0011] In one possible embodiment, the image further includes a third plate edge, and the area in which the third plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, and a second positional relationship, wherein the second positional relationship is the positional relationship between the first plate edge, the second plate edge, and the third plate edge.

[0012] In the present application, the area where the third plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, and the second positional relationship, i.e., the area where the plate edge is located can be freely identified based on the positions of at least two plate edges, thereby improving the degree of freedom in identifying the position of the plate edge.

[0013] In one possible embodiment, the image further includes a fourth plate edge, and the area in which the fourth plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge, and a third positional relationship, wherein the third positional relationship is the positional relationship between the first plate edge, the second plate edge, the third plate edge, and the fourth plate edge.

[0014] In the present application, the region where the fourth plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge, and the third positional relationship, thereby allowing the region where the plate edge is located to be freely identified based on the positions of at least three plate edges, thereby increasing the degree of freedom in identifying the position of the plate edge.

[0015] In one possible embodiment, the first plate edge is a longitudinal positive edge, the second plate edge includes a longitudinal negative edge and a transverse positive edge, the third plate edge includes a transverse positive ceramic edge and a transverse separator edge, and the fourth plate edge is a transverse negative edge.

[0016] In this application, the plate edges related to the overhang measurement include the longitudinal positive electrode edge, the longitudinal negative electrode edge, the transverse positive electrode edge, the transverse positive ceramic edge, the transverse separator edge, and the transverse negative electrode edge. The dynamic area-based location method allows for free location of these plate edges, and also allows for free determination of the overhang measurement.

[0017] In one possible embodiment, the step of determining an overhang measurement corresponding to the image based on the positions of a plurality of electrode plate edges includes the steps of: determining a spacing between the positive ceramic plate and the separator based on the positions of the horizontal positive ceramic edges and the horizontal separator edges; determining a spacing between the negative plate and the separator based on the positions of the horizontal negative edges and the horizontal separator edges; determining a first spacing between the positive plate and the negative plate based on the positions of the horizontal positive edges and the horizontal negative edges; and determining a first spacing between the positive plate and the negative plate based on the positions of the vertical positive edges and the vertical negative edges. determining a second spacing between the positive and negative electrodes; determining a spacing between the negative and positive ceramic plates based on the positions of the horizontal negative and positive edges; determining a positive plate width based on the positions of the vertical positive edges; determining a negative plate width based on the positions of the vertical negative edges; and determining an overhang measurement value corresponding to the image based on the spacing between the positive ceramic plate and separator, the spacing between the negative and separator, the first spacing, the second spacing, the spacing between the negative and positive ceramic plates, the positive plate width, and the negative plate width.

[0018] In this application, by determining the gap between the positive ceramic plate and the separator, the gap between the negative electrode and the separator, the first gap, the second gap, the gap between the negative electrode and the positive ceramic plate, the positive electrode plate width, and the negative electrode plate width, the overhang measurement value corresponding to the image can be accurately determined.

[0019] In one possible implementation, the image includes multiple images of the battery plate, each corresponding to a different region of the battery plate, and the method further includes determining a corresponding overhang measurement of the battery plate based on a corresponding overhang measurement of each of the multiple images and a positional relationship of the different regions.

[0020] In this application, images of different areas of the battery plate are acquired and the corresponding overhang measurements are determined respectively, which, compared to the overall image determination method, allows for more flexible image processing, and also allows for more precise detailed image processing, resulting in a more accurate final measurement result.

[0021] In one possible implementation, the images correspond to four corner areas of the battery plate, respectively.

[0022] In this application, the four corner areas of the battery plate are symmetrical, which not only ensures the commonality or consistency of the processing methods of each image, but also makes it easy to determine the overhang measurement value of the battery plate based on the overhang measurement values ​​of multiple images.

[0023] In one possible implementation, for any one plate edge, the process of locating the plate edge includes locating an edge transition point in the region where the plate edge is located based on the location of the region where the plate edge is located, and locating the plate edge based on the location of the edge transition point and a straight line fitting algorithm.

[0024] In this application, based on the dynamically identified region of each plate edge, the position of the edge transition point in the region where the plate edge is located is first identified, and then the position of the plate edge is effectively and accurately determined based on the position of the edge transition point and a straight line fitting algorithm.

[0025] In a second aspect, the present application provides an apparatus for measuring an overhang of a battery plate, the apparatus comprising functional modules for implementing the method for measuring an overhang of a battery plate according to the first aspect and any feasible form thereof.

[0026] In a third aspect, the present application provides a battery plate overhang measurement device, the battery plate overhang measurement device comprising a processor and a memory communicatively connected to the processor, the memory storing commands executable by the processor, and when the commands are executed by the processor, the processor performs a battery plate overhang measurement method according to any feasible form in the first and second aspects.

[0027] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored therein, the computer program being executed by a computer to perform the method for measuring the overhang of a battery plate according to the first aspect and any feasible mode thereof. [Brief explanation of the drawings]

[0028] In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings used in the embodiments of the present application will be briefly described below. The drawings described are only for illustrating some embodiments of the present application and are not intended to limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive abilities. [Figure 1] 1 is a schematic diagram of an image acquisition device according to an embodiment of the present application; [Figure 2] 1 is a first drawing illustrating an image according to an embodiment of the present application; [Figure 3] 2 is a second diagram illustrating an image according to an embodiment of the present application. [Figure 4] 1 is a flowchart of a method for measuring the overhang of a battery plate according to an embodiment of the present application. [Figure 5] 1 is a schematic diagram of a battery plate overhang measurement device according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram of a battery plate overhang measurement device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0029] The technical solutions of the embodiments of the present application will be described below with reference to the drawings. The following embodiments are merely illustrative for more clearly explaining the technical solutions of the present application, and do not limit the protection scope of the present application.

[0030] Unless otherwise specified, all technical and scientific terms used herein have the meanings commonly understood by those skilled in the art. The terms used herein are only for describing specific examples and are not intended to limit the present application. The terms "comprises," "has," and any variations thereof in the specification, claims, and description of the above drawings of this application mean a non-exclusive inclusion.

[0031] In the description of the embodiments of this application, technical terms such as "first," "second," etc. are merely used to distinguish between different elements, and do not express or imply relative importance, imply the number of technical features, or define a particular order or primary and secondary features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0032] When the term "embodiment" is used in this specification, it means that a particular feature, configuration, or characteristic described using the embodiment is included in at least one embodiment of the present application. When the term is used in various parts of the specification, it does not necessarily refer to the same embodiment, nor is it an independent embodiment or an alternative embodiment that is mutually exclusive with other embodiments. It is understood by those skilled in the art that the embodiment described in this specification may be combined with other embodiments.

[0033] In the description of the examples of this application, the term "and / or" is merely used to describe the relationship between related objects and represents three types of relationships, for example, A and / or B represents three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the symbol " / " in this specification generally represents an "or" relationship between the related objects before and after it.

[0034] In describing the examples of the present application, the term "plurality" means two or more (including two); similarly, "multiple sets" means two or more sets (including two sets); and "multiple sheets" means two or more (including two sheets).

[0035] Currently, from the perspective of market development, the applications of batteries are becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydroelectric power plants, thermal power plants, wind power plants, and solar power plants, but also in electric transportation such as electric bicycles, electric motorcycles, and electric cars, military equipment, aerospace, etc. With the expansion of the applications of power batteries, market demand is also increasing.

[0036] As battery applications expand, technology related to battery production processes is also evolving. Currently, battery processes mainly include winding and lamination, and composite electrodes are obtained by combining a battery's positive electrode, negative electrode, and separator. It is necessary to measure the overhang dimension of the composite electrode.

[0037] A conventional overhang measurement technique employs a linear fitting method based on a fixed area, in which each plate edge is localized in the fixed area, and the overhang measurement value is determined based on the localization results of each plate edge. For example, an image of a battery plate is acquired, and the area where the negative edge is located and the area where the positive edge is located are pre-defined fixed areas in the image. Linear fitting is then performed in the fixed area where the negative edge is located to locate the negative edge, and linear fitting is performed based on the fixed area where the positive edge is located to locate the positive edge, and the overhang measurement value is determined based on the localization results of the negative edge and the positive edge.

[0038] Although this measurement method can measure overhang, the applicant has found that the flexibility and adaptability of the overhang measurement are poor because the method uses a fixed area to determine the position relative to the plate edge. For example, this measurement method is only suitable for offline measurement and cannot be used for in-line measurement in battery processes. For example, this measurement method is limited in the image acquisition method, can only acquire images based on a fixed area, and cannot be freely changed, making it difficult to apply to complex environments.

[0039] The applicant has discovered that the fundamental reason why the above measurement methods have poor flexibility and adaptability is that they perform localization based on a fixed area. For example, because localization is performed based on a fixed area, using inline measurement does not necessarily result in accurate localization, and only offline measurement methods can be used. Furthermore, because localization is performed based on a fixed area, the captured image must include a fixed area, so images can only be captured based on a fixed area, and the image capture method cannot be freely changed to adapt to complex environments.

[0040] If the positioning of each plate edge does not depend on a fixed area but utilizes a free and variable area, it is no longer limited by the fixed area, and the degree of freedom and adaptability can be greatly improved.

[0041] In view of the above, the applicant has designed a technical solution to reduce the limitations of overhang measurement and improve the flexibility and adaptability of overhang measurement.

[0042] In the above technical solution, instead of using the conventional solution of straight line fitting based on a fixed area, the position of each plate edge is determined based on a dynamically determined area. Because the area is not fixed, the position of each plate edge can be determined more freely. For example, since there is no need to predetermine the area where each plate edge is located, it is suitable for both offline and in-line measurement.

[0043] Therefore, this method improves the degree of freedom in determining the position of each electrode edge, and further improves the degree of freedom in overhang measurement. As the degree of freedom is improved, the adaptability of overhang measurement is also improved accordingly. For example, since there is no need to consider the position determination of a fixed area, the image acquisition method also becomes more flexible, making it suitable for measuring overhangs in more complex environments.

[0044] The technical solution according to the embodiment of the present application is used in a battery manufacturing process including a stacking process and a winding process to measure the overhang of the combined battery plates, and the measured overhang is used to determine whether the combined battery plates meet the standard.

[0045] The technical solution according to the embodiment of the present application is used in a battery plate overhang measurement system, and the measurement system may be configured as a part of a laminating machine or a winding machine, or may be configured as a separate entity outside the laminating machine or the winding machine.

[0046] The battery plate overhang measurement system includes a battery plate measurement device and an image capture device that are communicatively coupled.

[0047] The image capture device is configured to capture images of the battery plate, and the overhang measurement device is configured to control the image capture device and realize overhang measurement based on the images captured by the image capture device. Of course, in some embodiments, the control of the image capture device is not limited to the overhang measurement device and may be realized by other control devices. The overhang measurement device can be understood as a smart device, a smart controller, a smart processor, etc., having data processing capabilities, data storage capabilities, etc.

[0048] 1 is a schematic diagram of an image capturing device according to an embodiment of the present application. The image capturing device includes a camera 101, a light source 102, and a clamping plate 103.

[0049] The technical solution according to the embodiment of the present application is used to measure the overhang of the combined battery plates. In the battery manufacturing process, after the combined battery plates are combined, they are sent to the next processing step, that is, the combined battery plates are moved along a predetermined moving direction.

[0050] The composite battery plate includes a front surface and a back surface, and the plate configuration includes, in order, a positive electrode, a separator, a negative electrode, a separator, and a positive electrode. In a predetermined direction of movement, the positive electrodes are separated from each other in a sheet-like structure.

[0051] The clamping plate 103 has a part installed on the front side of the electrode plate and another part installed on the back side of the electrode plate. When capturing an image, a corresponding control device controls the two parts of the clamping plate 103 to clamp the electrode plate so as to ensure stable image capture.

[0052] Since the front and back surfaces of the electrode plate are structurally symmetrical, overhang measurement can be achieved whether an image is acquired from the front or back surface. In some embodiments, the camera 101 includes a front camera unit and / or a back camera unit (in FIG. 1, the camera 101 includes a front camera unit and a back camera unit).

[0053] When the camera 101 includes a front camera unit, the light source 102 includes a light source for the front camera unit. When the camera 101 includes a rear camera unit, the light source 102 includes a light source for the rear camera unit. When the camera 101 includes a front camera unit and a rear camera unit, the light source 102 includes a light source for the front camera unit and a light source for the rear camera unit. As shown in FIG. 1 , the light source for the front camera unit includes a front light source and a rear light source, and the light source for the rear camera unit also includes a front light source and a rear light source.

[0054] The light source 102 is used for lighting the plate so that the image can be easily captured by the camera. The front light source is used for front lighting. The back light source is used for back lighting. The light source 102 can be a flash, an illumination lamp, etc., but is not limited thereto.

[0055] When adopting the technical solutions of the embodiments of the present application, one or more cameras may be installed in the front camera unit and / or the back camera unit.

[0056] If one camera 101 is installed, the camera 101 is configured to capture a complete image of the corresponding battery plate of the single positive electrode, and may be a line camera with a large field of view to meet the frame rate requirements.

[0057] When multiple cameras 101 are installed, the multiple cameras 101 are configured to capture images of different fields of view of the battery plate corresponding to the single positive electrode, for example, capturing images of the four corner areas of the battery plate, etc. In this case, the multiple cameras 101 may be area cameras with a high frame rate and a small field of view.

[0058] For ease of understanding, please refer to Figures 2 and 3. When multiple cameras 101 are installed, the captured image includes multiple fields of view, as shown in Figure 2, and images of multiple fields of view are captured by the multiple cameras. When one camera 101 is installed, the captured image is an image of a different area in the overall image shown in Figure 2, and is an image of field of view 3, as shown in Figure 3. When only one camera 101 is installed, only one field of view is included, and this field of view includes a complete image of the electrode plate. The field of view shown in Figure 2 is merely for ease of understanding the correspondence between Figure 3 and field of view 3.

[0059] Based on the above description of the invention concept and application scenario, please refer to Figure 4. Figure 4 is a flowchart of a method for measuring the overhang of a battery plate according to an embodiment of the present application. The measuring method includes the following steps:

[0060] Step 410: Acquire an image of the battery plate.

[0061] Step 420: Identify positions of a plurality of plate edges in the image. The plurality of plate edges are plate edges associated with corresponding overhang measurements in the image. The position of each plate edge is identified based on an area in which each plate edge is located, and the area in which each plate edge is located is a dynamically identified area.

[0062] Step 430: Determine an overhang measurement corresponding to the image based on the positions of the plurality of plate edges.

[0063] Referring to the application scenario description above, in step 410, the image of the battery plate may be an image of one complete battery plate, or may be images of different regions (different views) of the battery plate.

[0064] Correspondingly, the image in step 410 may be one image or multiple images, and the corresponding image processing method is the same whether it is one image or multiple images.

[0065] Referring to the image capture device description above, in step 410, images are received from the front camera unit and / or the back camera unit.

[0066] In step 420, a plurality of plate edges are located in the image, the plurality of plate edges being the plate edges associated with the overhang measurements corresponding to the image.

[0067] Since multiple images may be acquired in step 410, these multiple images correspond to different views of the battery plate. In this case, the overhang measurement determined based on the images may not represent the final overhang measurement, but rather the final overhang measurement must be determined based on the overhang measurements determined from each of the multiple images. Therefore, in step 420, multiple plate edges are defined as the plate edges associated with the overhang measurements corresponding to the images.

[0068] In the embodiment of the present application, the position of each plate edge is determined based on the area in which the plate edge is located, and the area in which the plate edge is located is a dynamically determined area. Because the area in which some plate edges are located is dynamically determined, it may be determined based on the positions of other plate edges. Therefore, in the embodiment of the present application, the area determination and the area-based location determination are integrated in step 420. In fact, once the area in which a plate edge is located is determined, the location of the plate edge is determined based on the area located on the plate edge. That is, the process of determining the location of the plate edge includes the dynamic determination of the area in which the plate edge is located.

[0069] In step 430, an overhang measurement value corresponding to the image is determined based on the positions of the plate edges. If steps 410 and 420 adopt different embodiments, step 430 may also adopt different embodiments, which will be described in detail in the following examples.

[0070] In an embodiment of the present application, the position of each plate edge associated with the overhang measurement value corresponding to an image is determined based on the region in which each plate edge is located, and the region in which each plate edge is located is a dynamically determined region. Compared to the prior art, the method does not employ a linear fitting method based on a fixed region, but instead determines the position of each plate edge based on a dynamically determined region. Because the region is not fixed, the position determination of each plate edge is more flexible. For example, the region in which each plate edge is located does not need to be predetermined. This method therefore improves the degree of freedom in determining the position of each plate edge, thereby improving the degree of freedom in overhang measurement. The increased degree of freedom also correspondingly improves the adaptability of overhang measurement. For example, not considering the position determination of a fixed region makes it more suitable for overhang measurement in more complex environments.

[0071] In one alternative embodiment, in step 420, the region in which each plate edge is located is a region identified based on predetermined region parameter information, or a region identified based on the position of one or more plate edges.

[0072] The predetermined region parameter information is parameter information for specifying the position of the region, such as pixel coordinates of the region boundary point, the region length, the region width, and the like.

[0073] In some embodiments, the region in which a first plate edge to be located among a plurality of plate edges is located is identified based on predetermined region parameter information, and the regions in which plate edges to be located after the first plate edge are located are identified based on the position of the first plate edge to be located, or are identified based on the positions of a plurality of plate edges that have already been located.

[0074] In the embodiments of the present application, the region in which each electrode edge is located may be identified based on predetermined region parameter information, or may be identified based on the positions of one or more electrode edges, allowing for more flexibility in the method of identifying the position of each electrode edge.

[0075] In one selectable embodiment, the image includes a first electrode plate edge and a second electrode plate edge, the region where the first electrode plate edge is located is identified based on predetermined region parameter information, and the region where the second electrode plate edge is located is identified based on the position of the first electrode plate edge and a first positional relationship, the first positional relationship being the positional relationship between the first electrode plate edge and the second electrode plate edge.

[0076] The first plate edge is understood to be the first plate edge to be located, and the second plate edge is understood to be the second plate edge to be located.

[0077] The process of identifying the position of the first plate edge includes a step of identifying the region in which the first plate edge is located based on predetermined region parameter information, and a step of identifying the position of the first plate edge based on the region in which the first plate edge is located.

[0078] The process of identifying the position of the second plate edge includes a step of identifying the area in which the second plate edge is located based on the position of the first plate edge and the first positional relationship, and a step of identifying the position of the second plate edge based on the area in which the second plate edge is located.

[0079] The first positional relationship is the positional relationship between the first plate edge and the second plate edge. For example, the first plate edge is located to the left of or above the second plate edge. After the position of the first plate edge is identified, the region in which the second plate edge is located can also be identified based on the positional relationship. For example, if the first plate edge is located above the second plate edge, the region in which the second plate edge is located is the region below the position in which the first plate edge is located.

[0080] In the embodiments of the present application, for a first plate edge and a second plate edge, the region in which the first plate edge is located is identified based on predetermined region parameters, and the region in which the second plate edge is located is identified based on the position of the first plate edge and the first positional relationship, i.e., the region in which the plate edges are located can be freely identified based on the position of one plate edge, thereby improving the degree of freedom in identifying the position of the plate edges.

[0081] In one selectable embodiment, the image further includes a third plate edge. The region in which the third plate edge is located is identified based on the positions of the first plate edge, the second plate edge, and a second positional relationship. The second positional relationship is the positional relationship between the first plate edge, the second plate edge, and the third plate edge.

[0082] The third plate edge is understood to be the plate edge to be located after the second plate edge, and the region in which the plate edge is located is identified based on the position of the first plate edge and the position of the second plate edge.

[0083] Correspondingly, the process of identifying the position of the third plate edge includes a step of identifying the area in which the third plate edge is located based on the position of the first plate edge, the position of the second plate edge and the second positional relationship, and a step of identifying the position of the third plate edge based on the area in which the third plate edge is located.

[0084] The second positional relationship is the positional relationship between the first plate edge, the second plate edge, and the third plate edge. For example, the third plate edge is located below the first plate edge and to the left of the second plate edge. After the positions of the first plate edge and the second plate edge are identified, the region in which the third plate edge is located can also be identified based on the positional relationship. For example, if the third plate edge is located below the first plate edge and to the left of the second plate edge, the region in which the third plate edge is located is below the position where the first plate edge is located and to the left of the position where the second plate edge is located.

[0085] In the embodiments of the present application, the area where the third plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, and the second positional relationship, i.e., the area where the plate edge is located can be freely identified based on the positions of at least two plate edges, thereby improving the degree of freedom in identifying the position of the plate edge.

[0086] In one alternative embodiment, the image further includes a fourth plate edge, and the region in which the fourth plate edge is located is identified based on the positions of the first plate edge, the second plate edge, the third plate edge, and a third positional relationship, where the third positional relationship is the positional relationship between the first plate edge, the second plate edge, the third plate edge, and the fourth plate edge.

[0087] The fourth plate edge is understood to be the plate edge to be located after the third plate edge, and the region in which the plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge and the third positional relationship.

[0088] The process of identifying the position of the fourth plate edge includes a step of identifying the area in which the fourth plate edge is located based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge and the third positional relationship, and a step of identifying the position of the fourth plate edge based on the area in which the fourth plate edge is located.

[0089] The third positional relationship is the positional relationship between the first, second, third, and fourth plate edges. For example, the fourth plate edge is located below the first plate edge, to the left of the second plate edge, and above the third plate edge. After the positions of the first, second, and third plate edges are identified, the region in which the fourth plate edge is located can also be identified based on the positional relationships. For example, the region in which the fourth plate edge is located is below the position in which the first plate edge is located, to the left of the position in which the second plate edge is located, and above the position in which the third plate edge is located.

[0090] In an embodiment of the present application, the region in which the fourth plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge, and the third positional relationship, thereby allowing the region in which the plate edge is located to be freely identified based on the positions of at least three plate edges, thereby increasing the degree of freedom in identifying the position of the plate edge.

[0091] When more electrode plate edges are involved, the region in which the electrode plate edges are located may be identified based on the positions of more electrode plate edges, and is not limited thereto.

[0092] In one alternative embodiment, the first plate edge is a longitudinal positive edge, the second plate edge includes a longitudinal negative edge and a transverse positive edge, the third plate edge includes a transverse positive ceramic edge and a transverse separator edge, and the fourth plate edge is a transverse negative edge.

[0093] This embodiment is an embodiment of the respective plate edges corresponding to the image shown in FIG. 3 above, that is, when the image in step 410 is the image shown in FIG. 3, the respective plate edges are the respective plate edges shown in this embodiment.

[0094] In this embodiment, in step 420, the region where the vertical positive edge is located is first identified based on predetermined region parameter information, and the position of the vertical positive edge is identified based on the region where the vertical positive edge is located. Furthermore, the region where the vertical negative edge is located is identified based on the position of the vertical positive edge and the positional relationship between the vertical positive edge and the vertical negative edge, the position of the vertical negative edge is identified based on the region where the vertical negative edge is located, the region where the horizontal positive edge is located is identified based on the position of the vertical positive edge and the positional relationship between the vertical positive edge and the horizontal positive edge, and the position of the horizontal positive edge is identified based on the region where the horizontal positive edge is located.

[0095] The region where the lateral positive electrode ceramic edge is located is identified based on the position of the longitudinal positive electrode edge, the position of the longitudinal negative electrode edge and / or the lateral positive electrode edge, and the positional relationship between the longitudinal positive electrode edge, the longitudinal negative electrode edge and / or the lateral positive electrode edge and the lateral positive electrode ceramic edge, and the position of the lateral positive electrode ceramic edge is identified based on the region where the lateral positive electrode ceramic edge is located. The process of identifying the position of the lateral separator edge can be referred to the process of identifying the position of the lateral positive electrode ceramic edge, so a description thereof will be omitted here.

[0096] Then, the region in which the lateral negative electrode edge is located is identified based on the position of the longitudinal positive electrode edge, the position of at least one electrode plate edge among the longitudinal negative electrode edge and the lateral positive electrode edge, the position of at least one electrode plate edge among the lateral positive electrode ceramic edge and the lateral separator edge, and the positional relationship between the at least one electrode plate edge among the longitudinal positive electrode edge, the longitudinal negative electrode edge and the lateral positive electrode edge and the at least one electrode plate edge among the lateral positive electrode ceramic edge and the lateral separator edge and the lateral negative electrode edge, and the region in which the lateral negative electrode edge is located, and the position of the lateral negative electrode edge is identified based on the region in which the lateral negative electrode edge is located.

[0097] In the present embodiment, the plate edges related to the overhang measurement include the longitudinal positive electrode edge, the longitudinal negative electrode edge, the transverse positive electrode edge, the transverse positive ceramic edge, the transverse separator edge, and the transverse negative electrode edge. The dynamic area-based location method allows for free location of these plate edges, and also allows for free determination of the overhang measurement.

[0098] Furthermore, using the above-mentioned electrode plate edges, as an optional embodiment, step 430 includes the steps of determining a gap between the positive ceramic plate and the separator based on the position of the horizontal positive ceramic edge and the position of the horizontal separator edge, determining a gap between the negative electrode and the separator based on the position of the horizontal negative edge and the position of the horizontal separator edge, determining a first gap between the positive electrode and the negative electrode based on the position of the horizontal positive electrode edge and the position of the horizontal negative electrode edge, and determining a gap between the positive electrode and the negative electrode based on the position of the vertical positive electrode edge and the position of the vertical negative electrode edge. determining a second spacing between the negative and positive ceramic plates based on the horizontal negative edge positions and the horizontal positive edge positions; determining a positive plate width based on the vertical positive edge positions; determining a negative plate width based on the vertical negative edge positions; and determining an overhang measurement corresponding to the image based on the spacing between the positive ceramic plate and the separator, the spacing between the negative electrode and the separator, the first spacing, the second spacing, the spacing between the negative and positive ceramic plates, the positive plate width, and the negative plate width.

[0099] This embodiment relates to a method for determining an overhang measurement value corresponding to the image shown in FIG. 3 above, that is, it illustrates a method for determining an overhang measurement value corresponding to the case where the image in step 410 is the image shown in FIG. 3.

[0100] In the examples of the present application, the measured value of the overhang may not represent one specific value but may represent the value of related measurement items, i.e., any one or more of the above-mentioned gap between the positive ceramic plate and the separator, the gap between the negative electrode and the separator, the first gap, the second gap, the gap between the negative electrode and the positive ceramic plate, the positive electrode plate width, and the negative electrode plate width.

[0101] These measurements are integrated to determine the final overhang measurement. Of course, these measurements may be used directly as the final overhang measurement. When evaluating based on the overhang measurement, the integrated overhang measurement may be compared with a standard integrated overhang measurement to evaluate whether the combined battery plate meets the requirements. Each measurement may be compared with the corresponding standard measurement, and based on multiple comparison results, the evaluation of whether the combined battery plate meets the requirements may be performed.

[0102] The gap between the edge of the positive ceramic plate and the separator may be the gap between the edge of the positive ceramic plate and the separator in the vertical direction. The gap between the negative electrode and the separator may be the gap between the negative electrode and the separator in the vertical direction. The first gap between the positive electrode and the negative electrode may be the gap between a horizontal positive electrode edge and a horizontal negative electrode edge in the vertical direction. The second gap between the positive electrode and the negative electrode may be the gap between a vertical positive electrode edge and a vertical negative electrode edge in the horizontal direction. The gap between the negative electrode and the positive ceramic plate may be the gap between a horizontal negative electrode edge and a positive ceramic plate edge in the vertical direction.

[0103] In some embodiments, the positive plate width is the distance between the position of the vertical positive edge in an image mirrored to FIG. 3 (an image with a mirrored field of view) and the position of the vertical positive edge in FIG. 3. The negative plate width is the distance between the position of the vertical negative edge in an image mirrored to FIG. 3 and the position of the vertical negative edge in FIG. 3.

[0104] Of course, if the image contains both vertical positive edges or both vertical negative edges, the positive plate width can be determined directly based on the positions of the both vertical positive edges, and the negative plate width can be determined based on the both vertical negative edges.

[0105] In the embodiments of the present application, the distance between the positive ceramic plate and the separator, the distance between the negative electrode and the separator, the first distance, the second distance, the distance between the negative electrode and the positive ceramic plate, the positive electrode plate width, and the negative electrode plate width are determined, thereby enabling accurate determination of the overhang measurement value corresponding to the image.

[0106] As described in the above embodiment, the image in step 410 may include multiple images, each corresponding to a different region of the battery plate. In this embodiment, the measurement method further includes, after step 430, determining a corresponding overhang measurement of the battery plate based on the corresponding overhang measurement of each of the multiple images and the positional relationship of the different regions.

[0107] Based on the positional relationship of different regions, an integration scheme for the overhang measurements corresponding to different images can be determined.

[0108] In some embodiments, if the different regions are symmetrical regions, the combination of the measurements corresponding to the different images may be, for example, by addition or addition followed by division by a predetermined value.

[0109] In some other embodiments, when the different regions are asymmetric regions, the manner of combining the measurements corresponding to the different images is, for example, weighted averaging, weighted summing, etc.

[0110] The specific integration method can be freely set depending on the specific application scenario, and is not limited here. The integration method to be adopted can be determined by prior data simulation, data experiment, etc.

[0111] In the embodiment of the present application, images of different areas of the battery plate are acquired and the corresponding overhang measurements are determined respectively, which, compared to the overall image determination method, allows for more flexible image processing, and also allows for more precise detailed image processing, resulting in a more accurate final measurement result.

[0112] In one alternative embodiment, the images correspond to four corner areas of the battery plate.

[0113] In this embodiment, the four corner areas of the battery plate are acquired, i.e., images of the battery plate in the four corner fields are acquired, and the image of one field of view among the acquired images can be referred to FIG. 3 above.

[0114] In the embodiment of the present application, the four corner regions of the battery plate are symmetrical, which not only ensures the commonality or consistency of the processing methods of each image, but also makes it easy to determine the overhang measurement value of the battery plate based on the overhang measurement values ​​of multiple images.

[0115] In some other embodiments, the multiple images may correspond to any two diagonal areas of the battery plate, or to areas where specified positions are located, and are not limited to the embodiments of the present application.

[0116] In one alternative embodiment, once the region where the plate edge is located has been identified, the process of locating the plate edge includes the steps of: locating the position of an edge transition point in the region where the plate edge is located based on the position of the region where the plate edge is located; and locating the plate edge based on the position of the edge transition point and a straight line fitting algorithm.

[0117] In this embodiment, the electrode edge is located using a straight line fitting method. The electrode edge is a straight line in the image. After the area where the line is located is identified, the edge transition points are located within the area using a binarization method. The identified edge transition points are the approximate locations of the line. However, because the edge transition points are not necessarily located on a straight line, a straight line fitting algorithm must be used to fit these edge transition points to accurately locate the electrode edge.

[0118] In some embodiments, the straight line fitting algorithm may be the least squares method, but of course, other straight line fitting algorithms may be adopted and are not limited here.

[0119] In some embodiments, before identifying the edge transition point for the first plate edge, a rough location of the region is further performed based on the region in which the first plate edge is located, a desired region is found, and an edge transition point is identified based on the desired region.

[0120] In the embodiment of the present application, based on the dynamically identified region of each plate edge, the position of the edge transition point in the region where the plate edge is located is first identified, and then the position of the plate edge is effectively and accurately identified based on the position of the edge transition point and a straight line fitting algorithm.

[0121] When the area where the plate edge is located is identified, other feasible linear positioning methods may be adopted to realize the positioning of the plate edge, for example, a method of fitting the position of the plate edge based on a fixed area may be adopted, and is not limited thereto.

[0122] 5, an embodiment of the present application further provides a battery plate overhang measuring device 500. The battery plate overhang measuring device 500 corresponds to the above-mentioned battery plate overhang measuring method, and includes an acquisition module 510, a position determination module 520, and a measurement value determination module 530.

[0123] The acquisition module 510 is configured to acquire an image of a battery plate. The location module 520 is configured to identify positions of a plurality of plate edges in the image, the plurality of plate edges being plate edges associated with overhang measurements corresponding to the image. The position of each plate edge is identified based on an area in which the respective plate edge is located, and the area in which the respective plate edge is located is a dynamically identified area. The measurement determination module 530 is configured to determine an overhang measurement corresponding to the image based on the positions of the plurality of plate edges.

[0124] In the embodiment of the present application, the measurement value determination module 530 specifically determines the gap between the positive ceramic plate and the separator based on the position of the horizontal positive ceramic edge and the position of the horizontal separator edge, determines the gap between the negative electrode and the separator based on the position of the horizontal negative electrode edge and the position of the horizontal separator edge, determines a first gap between the positive electrode and the negative electrode based on the position of the horizontal positive electrode edge and the position of the horizontal negative electrode edge, and determines a second gap between the positive electrode and the negative electrode based on the position of the vertical positive electrode edge and the position of the vertical negative electrode edge. determine a spacing between the negative and positive ceramic plates based on the positions of the horizontal negative and positive ceramic edges; determine a positive plate width based on the positions of the vertical positive edges; determine a negative plate width based on the positions of the vertical negative edges; and determine an overhang measurement value corresponding to the image based on the spacing between the positive ceramic plate and separator, the spacing between the negative and separator, the first spacing, the second spacing, the spacing between the negative and positive ceramic plates, the positive plate width, and the negative plate width.

[0125] In an embodiment of the present application, the measurement determination module 530 is further configured to determine a corresponding overhang measurement of the battery plate based on the corresponding overhang measurement of each of the plurality of images and the positional relationship of the different regions.

[0126] In an embodiment of the present application, for any one plate edge, the position determination module 520 is specifically configured to determine the position of an edge transition point in the region where the plate edge is located based on the position of the region where the plate edge is located, and determine the position of the plate edge based on the position of the edge transition point and a straight line fitting algorithm.

[0127] The battery plate overhang measurement device 500 corresponds to the battery plate overhang measurement method, and therefore the embodiments and technical effects of each functional module can refer to the embodiments and technical effects of the measurement method described above, and therefore, the description will be omitted here.

[0128] Based on the same inventive concept, an embodiment of the present application further provides a battery plate overhang measuring device 600, which is an entity that executes the above-mentioned measuring method, as shown in Fig. 6. The battery plate overhang measuring device 600 includes a processor 610 and a memory 620 that is communicatively connected with the processor 610. The memory 620 stores commands that can be executed by the processor 610. When the commands are executed by the processor 610, the processor 610 executes the battery plate overhang measuring method according to the above-mentioned embodiment.

[0129] The processor 610 and the memory 620 are communicatively connected by a communication bus.

[0130] The measuring device may include many other components in addition to those shown in FIG. 6, and FIG. 6 does not limit the structure of the measuring device.

[0131] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored therein, the computer program being executed by a computer to perform the battery plate measurement method according to the embodiment.

[0132] The devices and methods described in the embodiments of the present application may be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is merely a logical functional division, and may be implemented in other ways in actual practice. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections via several communication interfaces, devices, or units, and may be electrical, mechanical, or other types of connections.

[0133] Furthermore, units described as separate components may or may not be physically separate. Elements shown as units may or may not be physical units, i.e., they may be located in the same location or distributed across multiple networks. Some or all of the units can be selected according to actual requirements to achieve the purpose of the proposed embodiment.

[0134] Furthermore, each functional module in each embodiment of the present application may be integrated to form a single independent part, each module may exist independently, or two or more modules may be integrated to form an independent part.

[0135] The above is only an example of the present application and does not limit the scope of protection of the present application. Those skilled in the art may have various modifications and variations to the present application. As long as they do not deviate from the spirit and principle of the present application, any modifications, equivalent substitutions, improvements, etc., will fall within the scope of protection of the present application. [Explanation of symbols]

[0136] 100 Image acquisition device 101 Camera 102 Light source 103 Holding plate 600 Battery Plate Overhang Measuring Device 510 Acquisition Module 520 Location Module 530 Measurement Value Confirmation Module 600 Battery plate overhang measuring equipment 610 processor 620 memory

Claims

1. acquiring an image of a battery plate; locating a plurality of plate edges in the image; determining an overhang measurement corresponding to the image based on the positions of the plurality of plate edges; Including, The plurality of plate edges are plate edges associated with an overhang measurement value corresponding to the image, and a position of each of the plurality of plate edges is identified based on an area in which the corresponding plate edge is located, and the area in which each of the plate edges is located is a dynamically identified area; The region in which each of the electrode plate edges is located is a region identified based on predetermined region parameter information, or a region identified based on the positions of one or more electrode plate edges among the plurality of electrode plate edges, The image includes a first electrode plate edge and a second electrode plate edge, a region where the first electrode plate edge is located is identified based on predetermined region parameter information, and a region where the second electrode plate edge is located is identified based on a position of the first electrode plate edge and a first positional relationship, the first positional relationship being a positional relationship between the first electrode plate edge and the second electrode plate edge. A method for measuring the overhang of a battery plate, comprising:

2. The image further includes a third plate edge, and a region in which the third plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, and a second positional relationship, the second positional relationship being a positional relationship between the first plate edge, the second plate edge, and the third plate edge.

2. The method for measuring the overhang of a battery plate according to claim 1.

3. The image further includes a fourth plate edge, and a region in which the fourth plate edge is located is identified based on the position of the first plate edge, the position of the second plate edge, the position of the third plate edge, and a third positional relationship, and the third positional relationship is a positional relationship between the first plate edge, the second plate edge, the third plate edge, and the fourth plate edge.

3. The method for measuring the overhang of a battery plate according to claim 2.

4. The first electrode plate edge is a longitudinal positive electrode edge, the second electrode plate edge includes a longitudinal negative electrode edge and a transverse positive electrode edge, the third electrode plate edge includes a transverse positive electrode ceramic edge and a transverse separator edge, and the fourth electrode plate edge is a transverse negative electrode edge.

4. The method for measuring the overhang of a battery plate according to claim 3.

5. determining an overhang measurement corresponding to the image based on the positions of the plurality of plate edges; determining a spacing between the positive ceramic plate and the separator based on the position of the lateral positive ceramic edge and the position of the lateral separator edge; determining a spacing between the negative electrode and the separator based on the position of the lateral negative electrode edge and the position of the lateral separator edge; determining a first spacing between the positive electrode and the negative electrode based on the position of the lateral positive electrode edge and the position of the lateral negative electrode edge; determining a second gap between the positive electrode and the negative electrode based on the position of the longitudinal positive electrode edge and the position of the longitudinal negative electrode edge; determining a spacing between the negative electrode and the positive electrode ceramic plate based on the position of the lateral negative electrode edge and the position of the lateral positive electrode ceramic edge; determining a width of the positive electrode plate based on the position of the longitudinal positive electrode edge; determining a negative electrode plate width based on the position of the longitudinal negative electrode edge; determining an overhang measurement value corresponding to the image based on the gap between the positive ceramic plate and the separator, the gap between the negative electrode and the separator, the first gap, the second gap, the gap between the negative electrode and the positive ceramic plate, the positive plate width, and the negative plate width; Contains 5. The method for measuring the overhang of a battery plate according to claim 4.

6. the images include a plurality of images of the battery plate, each of the plurality of images corresponding to a different region of the battery plate; The method for measuring an overhang of a battery plate further includes determining a corresponding overhang measurement of the battery plate based on the corresponding overhang measurement of each of the plurality of images and the positional relationship of the different regions.

2. The method for measuring the overhang of a battery plate according to claim 1.

7. The plurality of images respectively correspond to four corner regions of the battery plate.

7. The method for measuring the overhang of a battery plate according to claim 6.

8. For any one of the plurality of plate edges, the process of identifying the position of the plate edge includes: determining a position of an edge transition point in the region where the electrode plate edge is located based on the position of the region where the electrode plate edge is located; determining the location of the plate edges based on the location of the edge transition points and a straight line fitting algorithm; Contains 2. The method for measuring the overhang of a battery plate according to claim 1.

9. an acquisition module, a location module, and a measurement determination module; the acquisition module is configured to acquire images of battery plates; the location identification module is configured to identify positions of a plurality of plate edges in the image, the plurality of plate edges being plate edges associated with overhang measurements corresponding to the image, the position of each plate edge being identified based on an area in which each of the plate edges is located, the area in which each of the plate edges is located being a dynamically identified area, the area in which each of the plate edges is located being an area identified based on predetermined area parameter information, or an area identified based on the positions of one or more plate edges among the plurality of plate edges; the measurement determination module is configured to determine an overhang measurement corresponding to the image based on the positions of the plurality of plate edges; The image includes a first electrode plate edge and a second electrode plate edge, a region where the first electrode plate edge is located is identified based on predetermined region parameter information, and a region where the second electrode plate edge is located is identified based on a position of the first electrode plate edge and a first positional relationship, the first positional relationship being a positional relationship between the first electrode plate edge and the second electrode plate edge. A battery plate overhang measuring device characterized by:

10. a processor and a memory in communication with the processor; A command executable by the processor is stored in the memory, and when the command is executed by the processor, the processor performs the battery plate overhang measurement method according to any one of claims 1 to 8. A battery plate overhang measuring device characterized by:

11. A computer program is stored in the computer, and when the computer program is executed by the computer, the method for measuring the overhang of a battery electrode plate according to any one of claims 1 to 8 is performed. A computer-readable storage medium comprising:

Images