An electrode material line position determination method, device, equipment and storage medium

Abstract

The application discloses an electrode material line position determination method, device, equipment and storage medium. The method comprises the following steps: acquiring a current first electrode image and a current second electrode image in a current layer electrode sheet winding process of a target electrode; determining a current first measurement distance and a current second measurement distance based on the current first electrode image, the current second electrode image and a preset calibration ratio; determining a current electrode compensation coefficient according to the current first measurement distance, the current second measurement distance, an initial first measurement distance corresponding to an outer side material line of the target electrode and an initial second measurement distance corresponding to an inner side material line of the target electrode; and performing distance compensation on the current first measurement distance and the current second measurement distance based on the current electrode compensation coefficient to determine a target first measurement distance corresponding to the outer side material line of the target electrode and a target second measurement distance corresponding to the inner side material line of the target electrode. The technical scheme of the embodiment of the application can improve the accuracy of electrode material line position determination.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a method, apparatus, device, and storage medium for determining the position of electrode material lines. Background Technology

[0002] With the development of technology, lithium batteries are being used more and more widely in daily life. Currently, the main processing technology for lithium batteries is the winding process. This process requires alignment checks on each layer of electrode sheets during production to effectively control errors and ensure the safety of the finished battery cell.

[0003] During the production process, the battery cell thickens during winding, which alters the distance between the cell surface and the camera lens. This causes a shift in the image resolution (i.e., the calibration scale) captured by the camera, reducing the accuracy of electrode wire positioning. Consequently, it becomes impossible to accurately detect cell alignment and assess the safety of battery production. Summary of the Invention

[0004] This invention provides a method, apparatus, device, and storage medium for determining the position of electrode material lines, thereby improving the accuracy of electrode material line position determination, enabling accurate detection of cell alignment, accurate assessment of battery production safety, and ensuring the safety of finished cell products.

[0005] According to one aspect of the present invention, a method for determining the position of an electrode material line is provided, the method comprising:

[0006] Acquire the current first electrode image captured by the first electrode camera and the current second electrode image captured by the second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and the inner side of the target electrode, respectively.

[0007] Based on the current first electrode image, the current second electrode image, and the preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position, and the current second measurement distance between the inner material line of the target electrode and the reference position;

[0008] Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, the current electrode compensation coefficient when winding the current layer of the electrode is determined.

[0009] Based on the current electrode compensation coefficient, distance compensation is performed on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

[0010] According to another aspect of the present invention, an electrode wire position determining device is provided, the device comprising:

[0011] An electrode image acquisition module is used to acquire a current first electrode image captured by a first electrode camera and a current second electrode image captured by a second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and inner side of the target electrode, respectively.

[0012] The current measurement distance determination module is used to determine the current first measurement distance between the outer material line of the target electrode and the reference position and the current second measurement distance between the inner material line of the target electrode and the reference position based on the current first electrode image, the current second electrode image and the preset calibration ratio;

[0013] The current electrode compensation coefficient determination module is used to determine the current electrode compensation coefficient when winding the current layer of electrode sheet based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of electrode sheet of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode.

[0014] The target measurement distance determination module is used to perform distance compensation on the current first measurement distance and the current second measurement distance based on the current electrode compensation coefficient, and determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the electrode wire position determination method according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the electrode wire position determination method according to any embodiment of the present invention.

[0020] The technical solution of this invention involves acquiring a current first electrode image captured by a first electrode camera and a current second electrode image captured by a second electrode camera during the winding of the current layer of the target electrode. The first and second electrode cameras are used to capture images of the outer and inner sides of the target electrode, respectively. Based on the current first electrode image, the current second electrode image, and a preset calibration ratio, a current first measurement distance between the outer material line of the target electrode and a reference position, and a current second measurement distance between the inner material line of the target electrode and the reference position are determined. According to the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode during the winding of the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, a current electrode compensation coefficient is determined during the winding of the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode. This invention provides an embodiment that analyzes and compares two initial measurement distances when winding the first layer of the target electrode and two measurement distances when winding the current layer of the target electrode to obtain the current electrode compensation coefficient caused by the increase in cell thickness when winding the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed, thereby improving the accuracy of electrode material line position determination without adding a mechanism. This allows for accurate detection of cell alignment and ensures accurate assessment of battery production safety.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of a method for determining the position of an electrode wire according to Embodiment 1 of the present invention;

[0024] Figure 2 These are schematic diagrams from different perspectives of a battery cell winding process according to Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram illustrating the change in cell thickness during the cell winding process according to Embodiment 1 of the present invention;

[0026] Figure 4 This is a schematic diagram of anode camera measurement and compensation for a k-layer battery cell according to Embodiment 1 of the present invention;

[0027] Figure 5 This is a flowchart of a method for determining the position of an electrode wire according to Embodiment 2 of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of an electrode material line position determination device provided in Embodiment 3 of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of an electronic device that implements the electrode material line position determination method of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Example 1

[0033] Figure 1This is a flowchart of an electrode wire position determination method provided in Embodiment 1 of the present invention. This embodiment is applicable to situations where the resolution (i.e., calibration ratio) of images captured by a camera is automatically compensated during the winding of a battery cell, especially for situations where dynamic automatic compensation is performed on visual pixels during the visual overhang detection process of the winding machine (the portion of the cathode electrode extending beyond the anode and cathode electrodes in the length and width directions). This method can be executed by an electrode wire position determination device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0034] S110. Acquire the current first electrode image captured by the first electrode camera and the current second electrode image captured by the second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and inner side of the target electrode, respectively.

[0035] The target electrode can refer to the cathode or anode of a lithium battery. For example, a lithium battery can refer to a power battery. The electrode camera can refer to a camera that captures images of the electrode. For example, the electrode camera can be a charge-coupled device (CCD) vision inspection device or an area array camera. The current layer can refer to the number of cell layers currently being wound. The current first electrode image can refer to an image of the outer side of the target electrode captured by the first electrode camera during the winding of the current layer of the target electrode. The current second electrode image can refer to an image of the inner side of the target electrode captured by the second electrode camera during the winding of the current layer of the target electrode.

[0036] Specifically, a first electrode camera and a second electrode camera are used to capture images during the winding process of each layer of the target electrode using a winding machine. The images are then acquired as follows: the first electrode image captured by the first electrode camera and the second electrode image captured by the second electrode camera during the winding of the current layer of the target electrode. If the target electrode is a cathode, the first electrode camera is used as a first cathode camera, and the second electrode camera as a second cathode camera; if the target electrode is an anode, the first electrode camera is used as a first anode camera, and the second electrode camera as a second anode camera. It should be noted that the compensation process for the cathode and anode of the battery cell is the same; this embodiment uses the target electrode as an example for explanation. Figure 2 A schematic diagram of the battery cell winding process from different perspectives is provided. See also... Figure 2 In the top view, camera 1 is responsible for shooting the outer side of the cathode, camera 2 is responsible for shooting the inner side of the cathode, and the field of view is on the section in front of the electrode winding needle; camera 3 is responsible for shooting the outer side of the anode, and camera 4 is responsible for shooting the inner side of the anode, and the field of view is on the winding needle.

[0037] S120. Based on the current first electrode image, the current second electrode image, and the preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position, and the current second measurement distance between the inner material line of the target electrode and the reference position.

[0038] The calibration scale can refer to the actual object size corresponding to one pixel, i.e., how many millimeters each pixel corresponds to. For example, the calibration scale can refer to resolution, i.e., image resolution. The outer electrode material line can include the diaphragm and the outer edge line of the electrode. The reference position can refer to a base position. The current first measurement distance can refer to the distance between the outer material line of the target electrode and the reference position in the current first electrode image. The inner electrode material line can refer to the diaphragm and the inner edge line of the electrode. The current second measurement distance can refer to the distance between the inner material line of the target electrode and the reference position in the current second electrode image.

[0039] Specifically, if the target electrode is an anode, the outer material line of the target electrode includes: a first diaphragm and the outer edge line of the anode; the inner material line of the target electrode includes: a first diaphragm and the inner edge line of the anode; and the current first measurement distance between the outer material line of the target electrode and the reference position can be determined based on the current first electrode image, the current second electrode image, and a preset calibration ratio. See also Figure 2 In the front and side views, the first diaphragm can refer to the lower diaphragm. If the target electrode is a cathode, the outer material line of the target electrode includes: the second diaphragm, the outer edge line of the cathode, the coating, and the back surface of the cathode; the inner material line of the target electrode includes: the second diaphragm and the inner edge line of the cathode. A current second measurement distance between the inner material line of the target electrode and a reference position can be determined based on the current first electrode image, the current second electrode image, and a preset calibration ratio. The second diaphragm can refer to the upper diaphragm. The coating can be, but is not limited to, AT9.

[0040] It should be noted that, Figure 3 A schematic diagram illustrating the change in cell thickness during the cell winding process is provided. (See also...) Figure 3 As the battery cell gradually thickens and takes shape during the winding process, the distance between the CCD vision device and the imaging position changes. The thicker the battery cell, the greater the distance to the camera, but the resolution (calibrated scale) is not automatically compensated for, resulting in increasingly larger errors.

[0041] For example, in S120, "determining the current first measurement distance between the outer material line of the target electrode and the reference position and the current second measurement distance between the inner material line of the target electrode and the reference position based on the current first electrode image, the current second electrode image and a preset calibration ratio" may include: determining the number of first pixels between the outer material line of the target electrode and the reference position based on the current first electrode image, and determining the current first measurement distance between the outer material line of the target electrode and the reference position based on the number of first pixels and a preset calibration ratio; determining the number of second pixels between the inner material line of the target electrode and the reference position based on the current second electrode image, and determining the current second measurement distance between the inner material line of the target electrode and the reference position based on the number of second pixels and a preset calibration ratio.

[0042] The first pixel count can refer to the number of pixels between the outer material line of the target electrode and the reference position in the current first electrode image. The second pixel count can refer to the number of pixels between the inner material line of the target electrode and the reference position in the current second electrode image.

[0043] Specifically, based on the current first electrode image, the number of pixels existing between the outer material line of the target electrode and the reference position can be determined, i.e., the first pixel count. Based on the first pixel count and a preset calibration ratio, the first pixel count is converted into distance information according to the preset calibration ratio, thereby determining the current first measurement distance between the outer material line of the target electrode and the reference position. Based on the information in the current second electrode image, the number of pixels between the inner material line of the target electrode and the reference position can be determined, i.e., the second pixel count. Based on the second pixel count and a preset calibration ratio, the second pixel count is converted into distance information according to the preset calibration ratio, thereby determining the current second measurement distance between the inner material line of the target electrode and the reference position.

[0044] S130. Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, determine the current electrode compensation coefficient when winding the current layer of the electrode.

[0045] The initial first measurement distance can refer to the distance information corresponding to the outer material line of the target electrode when the first layer of the target electrode is wound. The initial second measurement distance can refer to the distance information corresponding to the inner material line of the target electrode when the first layer of the target electrode is wound. The electrode compensation coefficient can refer to the coefficient for automatic compensation of the electrode shooting distance. The current electrode compensation coefficient can refer to the electrode compensation coefficient corresponding to the first layer of the target electrode being wound.

[0046] Specifically, based on the current first measurement distance and the current second measurement distance, the difference between the two distance information can be determined, and based on the initial first measurement distance and the initial second measurement distance, the difference between the two distance information can be determined, thereby determining the current electrode compensation coefficient when winding the current layer electrode based on the two difference information.

[0047] For example, in S130, "determine the current electrode compensation coefficient when winding the current layer of electrode sheet based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of electrode sheet of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode." may include: determining a first distance difference between the initial first measurement distance corresponding to the outer material line of the target electrode and the initial second measurement distance corresponding to the inner material line of the target electrode when winding the first layer of electrode sheet of the target electrode; determining a second distance difference between the current first measurement distance and the current second measurement distance; and determining the current electrode compensation coefficient when winding the current layer of electrode sheet based on the first distance difference and the second distance difference.

[0048] The first distance difference can refer to the difference between the initial first measured distance and the initial second measured distance. The second distance difference can refer to the difference between the current first measured distance and the current second measured distance.

[0049] Specifically, a first distance difference is determined between the initial first measurement distance corresponding to the outer material line of the target electrode and the initial second measurement distance corresponding to the inner material line of the target electrode when the first layer of the target electrode is wound; a second distance difference is determined between the current first measurement distance and the current second measurement distance; based on the first distance difference and the second distance difference, the first distance difference can be divided by the second distance difference, and the division result is determined as the current electrode compensation coefficient when the current layer of the electrode is wound.

[0050] Taking an anode camera as an example, the principle of the compensation process is explained in detail below. Figure 4 A schematic diagram of anode camera measurement and compensation for k-layer cells is presented. The imaging model of this method is analyzed as follows (see below). Figure 4 H is the initial working distance, which is the distance between the optical center of the camera and the surface of the needle. k Let be the thickness of the k-th cell layer, δ be the camera lens flange distance, and O`1 and O`2 be the centers of the inner and outer camera target surfaces, i.e., the calculation origin. 1k B 1k The position is on the outer side of the anode in the k-th layer, and its size is x. 1k A 2k B 2k The position is inside the anode of the k-th layer, and its size is x. 2k O`1B` 1kThe projection position of the outer side of the anode in the k-th layer is x`. 1k O`2B` 2k The projection position of the inner side of the anode in the k-th layer is x`. 2k .

[0051] If the fluctuation of the material line is Δx k ,but:

[0052] x 1k =x 11 +Δx k (1)

[0053] x 2k =x 21 -Δx k (2)

[0054] For the outer camera, based on similar triangles, we have:

[0055]

[0056]

[0057] Combining equations (3) and (4), we get:

[0058]

[0059] Record X 1k These are the measurements taken by the camera outside the anode of the k-th layer.

[0060] If the resolution is determined at the first level and the result is p, then:

[0061] X 11 =px` 11 =x 11

[0062] Right now:

[0063]

[0064] X 1k =px` 1k

[0065] Substituting into (5) and (6), we get:

[0066]

[0067] Similarly, for the inner side of the anode, we can obtain:

[0068]

[0069] From (1)(2)(7)(8), we can obtain:

[0070]

[0071] Right now:

[0072]

[0073] From equations (7) and (8), it can be seen that the CCD measured value is proportional to the actual value, and the proportion is an inverse proportional function of the cell thickness. Therefore, the compensation coefficient is a linear function of the cell thickness.

[0074] From equation (9), it can be seen that the compensation coefficient can be obtained from the CCD measurement results of the first layer of the battery cell (i.e., X). 11 and X 21 ) and the CCD measurement results of the k-th layer cell (i.e., X 1k and X 2k Linear regression is used to calculate the current electrode compensation coefficient. Based on this, the first distance difference between the initial first measurement distance and the initial second measurement distance can be divided by the second distance difference between the current first measurement distance and the current second measurement distance to determine the current electrode compensation coefficient when winding the current layer of electrode sheet. Thus, the compensation coefficient can be determined more accurately using the two measurement results, improving the accuracy of electrode wire position determination.

[0075] Each camera takes two photos of each electrode layer, meaning two photos per layer. Since each cell layer has a uniform thickness, the number of cell layers (k) has a linear relationship with the number of photos (n), i.e., n = 2k. Therefore, the compensation coefficient for each photo detection is a linear function of the number of photos, with an intercept of 1. That is:

[0076]

[0077] Where n is the number of photos taken, k is the k-th layer of the battery cell, and the relationship between them is n = 2k. α can also be used... Confirmed. Therefore, it can also be based on the maximum number of photos, n. max Final winding thickness of the battery cell The initial working distance H is determined.

[0078] It should be noted that the derivation process of the compensation principle for the two cathode cameras used to capture images of the outer and inner sides of the cathode is the same as described above. Figure 4 The derivation process of the compensation principle for the anode camera is the same as that in this embodiment, and will not be repeated here. For the two cathode cameras, their compensation coefficients are the same, and the compensation coefficients for the two anode cameras are also the same.

[0079] S140. Based on the current electrode compensation coefficient, perform distance compensation on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

[0080] The first measurement distance of the target electrode can refer to the distance that needs to be compensated for, corresponding to the material line on the outer side of the target electrode, after distance compensation calculation. The second measurement distance of the target electrode can refer to the distance that needs to be compensated for, corresponding to the material line on the inner side of the target electrode, after distance compensation calculation.

[0081] Specifically, based on the current electrode compensation coefficient, the current first measurement distance can be multiplied by the current electrode compensation coefficient, and the result of the multiplication is determined as the target first measurement distance corresponding to the outer material line of the target electrode. The current second measurement distance can be multiplied by the current electrode compensation coefficient, and the result of the multiplication is determined as the target second measurement distance corresponding to the inner material line of the target electrode.

[0082] The technical solution of this invention involves acquiring a current first electrode image captured by a first electrode camera and a current second electrode image captured by a second electrode camera during the winding of the current layer of the target electrode. The first and second electrode cameras are used to capture images of the outer and inner sides of the target electrode, respectively. Based on the current first electrode image, the current second electrode image, and a preset calibration ratio, a current first measurement distance between the outer material line of the target electrode and a reference position, and a current second measurement distance between the inner material line of the target electrode and the reference position are determined. Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode during the winding of the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, a current electrode compensation coefficient is determined during the winding of the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode. This invention provides an embodiment that analyzes and compares two initial measurement distances when winding the first layer of the target electrode and two measurement distances when winding the current layer of the target electrode to obtain the current electrode compensation coefficient caused by the increase in cell thickness when winding the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed, thereby improving the accuracy of electrode material line position determination without adding a mechanism. This allows for accurate detection of cell alignment and ensures accurate assessment of battery production safety.

[0083] Example 2

[0084] Figure 5 This is a flowchart of a method for determining the position of an electrode material line according to Embodiment 2 of the present invention. Based on the embodiments described above, this embodiment provides a detailed description of the determination of the target measurement distance. Explanations of terms that are the same as or corresponding to those in the above embodiments are not repeated here. Figure 5 As shown, the method includes:

[0085] S210. Acquire the current first electrode image captured by the first electrode camera and the current second electrode image captured by the second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and inner side of the target electrode, respectively.

[0086] S220. Based on the current first electrode image, the current second electrode image, and the preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position, and the current second measurement distance between the inner material line of the target electrode and the reference position.

[0087] S230. Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, determine the current electrode compensation coefficient when winding the current layer of the electrode.

[0088] S240. Based on the current electrode compensation coefficient, perform distance compensation on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

[0089] S250. Based on the first target measurement distance corresponding to the outer material line of each target electrode and the second target measurement distance corresponding to the inner material line of each target electrode, determine the first material line distance between the outer material lines of two target electrodes, the second material line distance between the inner material lines of two target electrodes, and the third material line distance between the outer material line of the target electrode and the inner material line of the target electrode.

[0090] The first material line distance can refer to the material line distance between the outer material lines of the two target electrodes. The second material line distance can refer to the material line distance between the inner material lines of the two target electrodes. The third material line distance can refer to the material line distance between the outer and inner material lines of the target electrodes.

[0091] Specifically, based on the first target measurement distance corresponding to the outer material line of each target electrode, the first material line distance between the two outer material lines of the target electrodes can be determined; based on the second target measurement distance corresponding to the inner material line of each target electrode, the second material line distance between the two inner material lines of the target electrodes can be determined; based on the first target measurement distance corresponding to the outer material line of each target electrode and the second target measurement distance corresponding to the inner material line of each target electrode, the third material line distance between the outer material line of the target electrode and the inner material line of the target electrode can be determined.

[0092] It should be noted that the measurement method for the compensated material line position and alignment (OH) is taken as an example. Table 1 shows the calculation results of camera 1 after compensation. Table 2 shows the calculation results of camera 2 after compensation. Table 3 shows the calculation results of camera 3 after compensation. Table 4 shows the calculation results of camera 4 after compensation.

[0093] Table 1. Calculation results of a camera 1 after compensation.

[0094]

[0095]

[0096] Table 2. Calculation results of a camera 2 after compensation.

[0097]

[0098] Table 3 shows the calculation results of a camera after compensation.

[0099]

[0100] Table 4 shows the calculation results of a camera after compensation.

[0101]

[0102]

[0103] S260, Alignment detection is performed based on the first material line distance, the second material line distance, and the third material line distance.

[0104] The technical solution of this invention calculates the first target measurement distance and the second target measurement distance, and determines the first material line distance, the second material line distance, and the third material line distance based on the first target measurement distance corresponding to all the outer material lines of the target electrode and the second target measurement distance corresponding to the inner material lines of the target electrode. This allows alignment detection to be performed based on the first material line distance, the second material line distance, and the third material line distance, which not only accurately determines the position of the electrode material lines but also further ensures the accuracy of the cell alignment detection and the accurate assessment of the safety of battery production.

[0105] The following are embodiments of the electrode wire position determination device provided in this invention. This device and the electrode wire position determination method in the above embodiments belong to the same inventive concept. For details not described in detail in the embodiments of the electrode wire position determination device, please refer to the embodiments of the above electrode wire position determination method.

[0106] Example 3

[0107] like Figure 6As shown, the device includes: an electrode image acquisition module 310, a current measurement distance determination module 320, a current electrode compensation coefficient determination module 330, and a target measurement distance determination module 340.

[0108] The electrode image acquisition module 310 is used to acquire the current first electrode image captured by the first electrode camera and the current second electrode image captured by the second electrode camera during the winding of the current layer of the target electrode. The first electrode camera and the second electrode camera are used to capture the outer and inner sides of the target electrode, respectively. The current measurement distance determination module 320 is used to determine the current first measurement distance between the outer material line of the target electrode and the reference position and the current second measurement distance between the inner material line of the target electrode and the reference position based on the current first electrode image, the current second electrode image and a preset calibration ratio. The current electrode compensation coefficient determination module 330 is used to determine the current electrode compensation coefficient when winding the current layer of the electrode based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode. The target measurement distance determination module 340 is used to perform distance compensation on the current first measurement distance and the current second measurement distance based on the current electrode compensation coefficient to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

[0109] The technical solution of this invention involves acquiring a current first electrode image captured by a first electrode camera and a current second electrode image captured by a second electrode camera during the winding of the current layer of the target electrode. The first and second electrode cameras are used to capture images of the outer and inner sides of the target electrode, respectively. Based on the current first electrode image, the current second electrode image, and a preset calibration ratio, a current first measurement distance between the outer material line of the target electrode and a reference position, and a current second measurement distance between the inner material line of the target electrode and the reference position are determined. Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode during the winding of the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, a current electrode compensation coefficient is determined during the winding of the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode. This invention provides an embodiment that analyzes and compares two initial measurement distances when winding the first layer of the target electrode and two measurement distances when winding the current layer of the target electrode to obtain the current electrode compensation coefficient caused by the increase in cell thickness when winding the current layer of the electrode. Based on the current electrode compensation coefficient, distance compensation is performed, thereby improving the accuracy of electrode material line position determination without adding a mechanism. This allows for accurate detection of cell alignment and ensures accurate assessment of battery production safety.

[0110] Optionally, the current measurement distance determination module 320 is specifically used for:

[0111] Based on the current first electrode image, determine the number of first pixels between the outer material line of the target electrode and the reference position, and based on the number of first pixels and the preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position.

[0112] Based on the current second electrode image, determine the number of second pixels between the inner material line of the target electrode and the reference position, and based on the number of second pixels and the preset calibration ratio, determine the current second measurement distance between the inner material line of the target electrode and the reference position.

[0113] Optionally, the current electrode compensation coefficient determination module 330 may include:

[0114] The first distance difference determination submodule is used to determine the first distance difference between the current first measured distance and the current second measured distance;

[0115] The second distance difference determination submodule is used to determine the second distance difference between the initial first measurement distance corresponding to the outer material line of the target electrode and the initial second measurement distance corresponding to the inner material line of the target electrode when the first layer of electrode sheet of the target electrode is wound.

[0116] The current electrode compensation coefficient determination submodule is used to determine the current electrode compensation coefficient when winding the current layer electrode sheet based on the first distance difference and the second distance difference.

[0117] Optionally, the current electrode compensation coefficient determination submodule is specifically used for:

[0118] Divide the first distance difference by the second distance difference, and the result of the division is determined as the current electrode compensation coefficient when winding the current layer electrode sheet.

[0119] Optionally, the target measurement distance determination module 340 is specifically used for:

[0120] Multiply the current first measurement distance by the current electrode compensation coefficient, and the result of the multiplication is determined as the target first measurement distance corresponding to the material line on the outer side of the target electrode;

[0121] The current second measurement distance is multiplied by the current electrode compensation coefficient, and the result of the multiplication is determined as the target second measurement distance corresponding to the inner material line of the target electrode.

[0122] Optionally, the target measurement distance determination module 340 may further include:

[0123] The material line distance determination submodule is used to determine the first material line distance between two target electrode outer material lines, the second material line distance between two target electrode inner material lines, and the third material line distance between the target electrode outer material line and the target electrode inner material line based on the target first measurement distance corresponding to the target outer material line and the target second measurement distance corresponding to the target inner material line of each target electrode.

[0124] The alignment detection submodule is used to perform alignment detection based on the first material line distance, the second material line distance, and the third material line distance.

[0125] Optionally, when the target electrode is an anode, the outer material line of the target electrode includes: a first diaphragm and an outer edge line of the anode, and the inner material line of the target electrode includes: a first diaphragm and an inner edge line of the anode; when the target electrode is a cathode, the outer material line of the target electrode includes: a second diaphragm, an outer edge line of the cathode, a coating and a back surface of the cathode, and the inner material line of the target electrode includes: a second diaphragm and an inner edge line of the cathode.

[0126] The electrode wire position determination device provided in the embodiments of the present invention can execute the electrode wire position determination method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0127] It is worth noting that in the embodiments of the electrode material line position determination device described above, the various modules are divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional module are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0128] Example 4

[0129] Figure 7 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0130] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0131] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0132] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the electrode wire position determination method.

[0133] In some embodiments, the electrode wire position determination method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or mounted on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the electrode wire position determination method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the electrode wire position determination method by any other suitable means (e.g., by means of firmware).

[0134] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0135] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0136] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0137] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0138] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0139] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through a communication network. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0140] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0141] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining the position of an electrode material line, characterized in that, include: Acquire the current first electrode image captured by the first electrode camera and the current second electrode image captured by the second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and the inner side of the target electrode, respectively. Based on the current first electrode image, the current second electrode image, and the preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position, and the current second measurement distance between the inner material line of the target electrode and the reference position; Based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode, the current electrode compensation coefficient when winding the current layer of the electrode is determined; wherein, the current electrode compensation coefficient is a linear function based on the number of photos taken, and the intercept is 1, and the number of photos taken is linearly related to the number of cell layers; Based on the current electrode compensation coefficient, distance compensation is performed on the current first measurement distance and the current second measurement distance to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

2. The method according to claim 1, characterized in that, The step of determining the current first measurement distance between the outer material line of the target electrode and the reference position and the current second measurement distance between the inner material line of the target electrode and the reference position based on the current first electrode image, the current second electrode image and a preset calibration ratio includes: Based on the current first electrode image, determine the number of first pixels between the outer material line of the target electrode and the reference position, and based on the number of first pixels and a preset calibration ratio, determine the current first measurement distance between the outer material line of the target electrode and the reference position. Based on the current second electrode image, the number of second pixels between the inner material line of the target electrode and the reference position is determined, and based on the number of second pixels and the preset calibration ratio, the current second measurement distance between the inner material line of the target electrode and the reference position is determined.

3. The method according to claim 1, characterized in that, The step of determining the current electrode compensation coefficient when winding the current layer of electrode sheet based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of electrode sheet of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode includes: Determine a first distance difference between the initial first measurement distance corresponding to the outer material line of the target electrode and the initial second measurement distance corresponding to the inner material line of the target electrode when the first layer of electrode sheet of the target electrode is wound; Determine the second distance difference between the current first measurement distance and the current second measurement distance; Based on the first distance difference and the second distance difference, the current electrode compensation coefficient is determined when winding the current layer electrode sheet.

4. The method according to claim 3, characterized in that, The step of determining the current electrode compensation coefficient when winding the current layer electrode sheet based on the first distance difference and the second distance difference includes: Divide the first distance difference by the second distance difference, and the result of the division is determined as the current electrode compensation coefficient when winding the current layer electrode sheet.

5. The method according to claim 1, characterized in that, The step of performing distance compensation on the current first measurement distance and the current second measurement distance based on the current electrode compensation coefficient to determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode includes: The current first measurement distance is multiplied by the current electrode compensation coefficient, and the result of the multiplication is determined as the target first measurement distance corresponding to the outer material line of the target electrode; The current second measurement distance is multiplied by the current electrode compensation coefficient, and the result of the multiplication is determined as the target second measurement distance corresponding to the inner material line of the target electrode.

6. The method according to claim 1, characterized in that, After determining the first target measurement distance corresponding to the outer material line of the target electrode and the second target measurement distance corresponding to the inner material line of the target electrode, the method further includes: Based on the first target measurement distance corresponding to the outer material line of each target electrode and the second target measurement distance corresponding to the inner material line of each target electrode, the first material line distance between the two outer material lines of the target electrodes, the second material line distance between the two inner material lines of the target electrodes, and the third material line distance between the outer material line of the target electrode and the inner material line of the target electrode are determined. Alignment detection is performed based on the first material line distance, the second material line distance, and the third material line distance.

7. The method according to any one of claims 1-6, characterized in that, When the target electrode is an anode, the outer material line of the target electrode includes: a first diaphragm and an outer edge line of the anode, and the inner material line of the target electrode includes: a first diaphragm and an inner edge line of the anode; When the target electrode is a cathode, the outer material line of the target electrode includes: a second diaphragm, an outer edge line of the cathode, a coating, and a back surface of the cathode; the inner material line of the target electrode includes: a second diaphragm and an inner edge line of the cathode.

8. An electrode material line position determination device, characterized in that, include: An electrode image acquisition module is used to acquire a current first electrode image captured by a first electrode camera and a current second electrode image captured by a second electrode camera during the current layer electrode sheet winding process of the target electrode, wherein the first electrode camera and the second electrode camera are used to capture the outer side and inner side of the target electrode, respectively. The current measurement distance determination module is used to determine the current first measurement distance between the outer material line of the target electrode and the reference position and the current second measurement distance between the inner material line of the target electrode and the reference position based on the current first electrode image, the current second electrode image and the preset calibration ratio; The current electrode compensation coefficient determination module is used to determine the current electrode compensation coefficient when winding the current layer of electrode sheet based on the current first measurement distance, the current second measurement distance, the initial first measurement distance corresponding to the outer material line of the target electrode when winding the first layer of electrode sheet of the target electrode, and the initial second measurement distance corresponding to the inner material line of the target electrode; wherein, the current electrode compensation coefficient is a linear function based on the number of photos taken, and the intercept is 1, and the number of photos taken is linearly related to the number of cell layers; The target measurement distance determination module is used to perform distance compensation on the current first measurement distance and the current second measurement distance based on the current electrode compensation coefficient, and determine the target first measurement distance corresponding to the outer material line of the target electrode and the target second measurement distance corresponding to the inner material line of the target electrode.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the electrode wire position determination method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the electrode wire position determination method according to any one of claims 1-7.

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