CN113624137A - Battery cell detection method, light distribution method, device, electronic equipment and storage medium - Google Patents
Battery cell detection method, light distribution method, device, electronic equipment and storage medium Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
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Abstract
The application provides a battery cell detection method, a light distribution device, electronic equipment and a storage medium, wherein the battery cell detection method comprises the following steps: acquiring first image data of at least two angular positions of an electric core according to a positioning position of the electric core, wherein the electric core comprises a cathode sheet, a diaphragm and an anode sheet which are stacked along a vertical direction; measuring a first distance of the co-angular edges of the anode sheet and the separator in the horizontal direction and a second distance of the co-angular edges of the cathode sheet and the anode sheet in the horizontal direction; and detecting whether the position of the cell surface layer pole piece is qualified or not based on the first distance and/or the second distance. The problem of low detection accuracy in the existing battery cell detection technology can be solved.
Description
Technical Field
The application relates to the field of battery cell detection, in particular to a battery cell detection method, a light distribution method, a device, electronic equipment and a storage medium.
Background
At present, in the production process of a laminated battery cell, the mode of continuously stacking battery cell diaphragms is not cut off in common use, the battery cell is subjected to laser cutting after stacking is completed, whether the positions of cathode and anode sheets of the battery cell are qualified needs to be detected after cutting, but due to the influence of the laser cutting, the battery cell diaphragms can generate the conditions of tilting, wrinkling and blacking, and can influence the battery cell detection, so that the problem of low detection accuracy exists in the current battery cell detection process.
Disclosure of Invention
An object of the embodiments of the present application is to provide a battery cell detection method, a light distribution method, a device, an electronic device, and a storage medium, so as to solve the problem of low detection accuracy in the current battery cell detection process.
In a first aspect, an embodiment of the present application provides a battery cell detection method, including:
acquiring first image data of at least two angular positions of an electric core according to a positioning position of the electric core, wherein the electric core comprises a cathode sheet, a diaphragm and an anode sheet which are stacked along a vertical direction;
measuring a first distance of the co-angular edges of the anode sheet and the separator in the horizontal direction and a second distance of the co-angular edges of the cathode sheet and the anode sheet in the horizontal direction;
and detecting whether the position of the cell surface layer pole piece is qualified or not based on the first distance and/or the second distance.
In the implementation process, the boundary of the anode sheet, the diaphragm or the cathode sheet at the same angular position is selected from the collected first image data to calculate the first distance between the anode sheet and the diaphragm and the second distance between the cathode sheet and the anode sheet, and the distances between the anode sheet and the diaphragm and between the cathode sheet and the anode sheet can be calculated from a plurality of angular positions, so that whether the position of the battery cell surface layer pole piece is qualified or not is detected, and the accuracy of battery cell detection is improved.
Optionally, before the acquiring the first image data of at least two angular positions of the battery cell according to the positioning position of the battery cell, the method includes:
grabbing two adjacent edges of the membrane;
and acquiring the positioning position of the battery cell based on two adjacent edges of the diaphragm.
In the implementation process, the battery cell is positioned by two adjacent edges of the grabbing diaphragm, the position of each angular position of the battery cell can be accurately found by the camera device according to the positioning position, the shot first image data is clearer, and in addition, the battery cell is required to be polished when being detected by the battery cell, so that the light source can be adjusted according to the positioning position, and the accuracy of battery cell detection is improved.
Optionally, the method further comprises:
irradiating the electric core by adopting a mesoporous area light source, and acquiring second image data of the electric core;
detecting whether the separator area of the cell is exposed to the anode sheet or the cathode sheet based on the second image data.
Further, the battery cell may be a special-shaped battery cell, and for a special-shaped portion of the battery cell, the first image data of the special-shaped portion is compared based on inspection parameters to detect whether the position of the special-shaped portion of the surface pole piece is qualified, where the inspection parameters include at least two of polarity, contrast, and an ignore point.
In the implementation process, the embodiment of the application can set the inspection parameters according to the detection requirements, can set three parameters when requiring higher precision, can set any two parameters when requiring higher efficiency, can give consideration to the precision and the efficiency of detection, and improves the flexibility of battery core detection. Through carrying out the shooting of second time to electric core, can detect out whether the diaphragm of electric core has the condition of rolling over, further improve the accuracy that electric core detected.
In a second aspect, an embodiment of the present application provides a cell detection light distribution method, including:
at least two strip-shaped light sources are respectively arranged around the battery cell, and the strip-shaped light sources and the battery cell are positioned on the same horizontal plane;
the battery cell is irradiated by a point light source, the point light source is arranged between the battery cell and the camera device in the vertical direction, and the point light source is arranged outside the visual field of the camera device in the horizontal direction, so that when the battery cell is detected, based on the irradiation of the bar-shaped light source and the point light source, the first image data of the battery cell is acquired.
In the implementation process, the strip light source is lowered by an angle to improve the compatibility of light, the strip light source can be suitable for the electric core with poor hot pressing or edge wrinkles, the strip light source and the electric core are positioned on the same horizontal plane to highlight the outline characteristics of the edge of the electric core, and a cathode sheet, an anode sheet and a diaphragm of the electric core are more clearly presented, so that the influence of the diaphragm on the electric core detection can be reduced, and the electric core detection precision is improved. Carry out the light filling through the pointolite, also be favorable to the special-shaped partial edge analysis of grabbing of electric core, can improve electric core detection accuracy.
Optionally, the method further comprises:
and a mesopore area light source is arranged below a lens of the camera device, and the camera device shoots the battery cell through a through hole of the mesopore area light source so as to acquire second image data of the battery cell under the irradiation of the mesopore area light source.
In the implementation process, whether the diaphragm is folded or not can be effectively detected by additionally arranging the mesoporous area light source, namely, whether the diaphragm area of the battery cell is exposed out of the anode sheet or the cathode sheet is detected, and the detection accuracy is improved.
Optionally, the wavelength of the strip light source and the point light source ranges from 625-.
In a third aspect, an embodiment of the present application further provides an electrical core detection apparatus, including:
the first image acquisition module is used for acquiring first image data of at least two angular positions of the battery cell according to the positioning position of the battery cell, and the battery cell comprises a cathode sheet, a diaphragm and an anode sheet which are stacked in the vertical direction.
The measuring module is used for measuring a first distance of the same-angle position edge of the anode sheet and the diaphragm in the horizontal direction and a second distance of the same-angle position edge of the cathode sheet and the anode sheet in the horizontal direction.
And the judging module is used for detecting whether the position of the cell surface layer pole piece is qualified or not based on the first distance and/or the second distance.
In the implementation process, the boundary of the anode sheet, the diaphragm or the cathode sheet at the same angular position is selected from the collected first image data to calculate the first distance between the anode sheet and the diaphragm and the second distance between the cathode sheet and the anode sheet, and the distances between the anode sheet and the diaphragm and between the cathode sheet and the anode sheet can be calculated from a plurality of angular positions, so that whether the position of the battery cell surface layer pole piece is qualified or not is detected, and the accuracy of battery cell detection is improved.
Optionally, the battery cell detection apparatus may further include a positioning module, where the positioning module is configured to grasp two adjacent edges of the diaphragm, and obtain a positioning position of the battery cell based on the two adjacent edges of the diaphragm.
In the implementation process, the battery cell is positioned by two adjacent edges of the grabbing diaphragm, the position of each angular position of the battery cell can be accurately found by the camera device according to the positioning position, the shot first image data is clearer, and in addition, the battery cell is required to be polished when being detected by the battery cell, so that the light source can be adjusted according to the positioning position, and the accuracy of battery cell detection is improved.
Optionally, the measurement module may be further operable to:
controlling a mesoporous surface light source to irradiate the electric core, and acquiring second image data of the electric core;
detecting whether the separator area of the cell is exposed to the anode sheet or the cathode sheet based on the second image data.
Optionally, the measurement module may be specifically configured to:
and for the special-shaped part of the battery core, comparing the first image data of the special-shaped part based on inspection parameters to detect whether the position of the special-shaped part of the cathode sheet is qualified or not, wherein the inspection parameters comprise at least two items of polarity, contrast and neglected points.
In the implementation process, the embodiment of the application can set the inspection parameters according to the detection requirements, can set three parameters when requiring higher precision, can set any two parameters when requiring higher efficiency, can give consideration to the precision and the efficiency of detection, and improves the flexibility of battery core detection. Through carrying out the shooting of second time to electric core, can detect out whether the diaphragm of electric core has the condition of rolling over, further improve the accuracy that electric core detected.
In a fourth aspect, an embodiment of the present application further provides an electronic device, where the electronic device includes a memory and a processor, where the memory stores program instructions, and the processor executes the steps in any one of the foregoing implementation manners when reading and executing the program instructions.
In a fifth aspect, an embodiment of the present application further provides a storage medium, where the readable storage medium stores computer program instructions, and the computer program instructions are read by a processor and executed to perform the steps in any of the foregoing implementation manners.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a battery cell detection method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a step of positioning a battery cell according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a step of detecting whether the diaphragm is folded according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a detection angle provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of a cell detection device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. For example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
Referring to fig. 1, fig. 1 is a schematic flow chart of a cell detection method according to an embodiment of the present disclosure, where the method includes the following steps:
in step S12, first image data of at least two angular positions of a cell including a cathode sheet, a separator, and an anode sheet stacked in a vertical direction is acquired according to a positioning position of the cell.
In step S13, a first distance in the horizontal direction of the homeotropic edges of the anode sheet and the separator and a second distance in the horizontal direction of the homeotropic edges of the cathode sheet and the anode sheet are measured.
In step S14, whether the position of the cell skin pole piece is qualified is detected based on the first distance and/or the second distance.
The battery cell detection method includes the steps that a camera device can be adopted to obtain first image data of a battery cell, the camera device can be one, the first image data of a plurality of angular positions of the battery cell are respectively adopted through one camera device, the camera devices can also be multiple, the camera devices are arranged above the battery cell, the first image data of the plurality of angular positions of the battery cell are simultaneously adopted, the angular position refers to a boundary part of the battery cell to be detected, and for example, the angular position 1 can refer to the position where a sideline of each part of the battery cell is located.
For example, the battery cell detected in the embodiment of the present application is a laminated battery cell, the AS represents a first distance between the anode strip and the separator, and the AC represents a second distance between the cathode strip and the anode strip, and since the anode strip or the cathode strip of the battery cell is below the separator and there is a case that shooting is unclear, multiple segments of interval data are selected from at least two preset angular positions in the first image data to be calculated to obtain values of the AS and the AC, so AS to determine whether the laminated battery cell to be detected is qualified according to the values of the AS and the AC.
In other embodiments, the battery cell may also be formed by stacking an anode sheet, a separator and a cathode sheet, which are stacked in a vertical direction.
In the above steps, at least two angular positions are adopted to obtain interval data in order to improve the fault tolerance rate. It should be understood that the selection of 11 angular positions in the implementation steps provided in the embodiments of the present application to detect the cell is only illustrative, and how many angular positions are selected in the practical process may be specifically set according to the shape of the cell to be detected. Therefore, the boundary of the anode sheet, the diaphragm or the cathode sheet in the same angular position is selected from the collected first image data to calculate the first distance between the anode sheet and the diaphragm and the second distance between the cathode sheet and the anode sheet, and the distances between the anode sheet and the diaphragm and between the cathode sheet and the anode sheet can be calculated from a plurality of angular positions, so that whether the position of the surface pole piece of the battery cell is qualified or not is detected, and the accuracy of battery cell detection is improved.
Optionally, before step S12, an implementation step for positioning a cell is provided in an embodiment of the present application, please refer to fig. 2, where fig. 2 is a schematic diagram of a step for positioning a cell provided in an embodiment of the present application, and the step may include the following steps:
in step S111, two adjacent edges of the membrane are grasped.
In step S112, a positioning position of the battery cell is acquired based on two adjacent edges of the diaphragm.
The battery cell can be shot in advance through the camera device on the detection platform, shot images are recognized, when the detected battery cell is the special-shaped battery cell, the side line of the non-special-shaped diaphragm of the special-shaped battery cell can be grabbed, any side line adjacent to the side line is obtained, the two adjacent side lines of the battery cell are represented by line segments, and therefore battery cell positioning is achieved.
Therefore, the battery cell is positioned by two adjacent edges of the grabbing diaphragm, the camera device can accurately find the position of each angular position of the battery cell according to the positioning position, the shot first image data is clearer, and in addition, the battery cell is required to be polished when being detected, so that the light source can be adjusted according to the positioning position, and the accuracy of battery cell detection is improved.
Optionally, after step S14, an implementation step of detecting whether the diaphragm is folded is provided in the embodiment of the present application, please refer to fig. 3, where fig. 3 is a schematic diagram of the step of detecting whether the diaphragm is folded, and the step may include the following steps:
in step S31, the cell is irradiated with a mesoporous surface light source, and second image data of the cell is acquired.
In step S32, it is detected whether the separator area of the cell is exposed to the anode sheet or the cathode sheet based on the second image data.
The mesopore area light source can be white light, the camera device can be a black and white camera, the battery cell to be detected can be shot by the black and white camera, the contrast ratio of the battery cell and the background is improved, and therefore the outline characteristics of the battery cell edge are highlighted.
Further, the battery cell may be a special-shaped battery cell, and for a special-shaped portion of the battery cell, the first image data of the special-shaped portion is compared based on inspection parameters to detect whether the position of the special-shaped portion of the battery cell surface layer pole piece is qualified, where the inspection parameters include at least two of polarity, contrast, and an ignore point.
Therefore, the detection parameters can be set according to the detection requirements, three parameters can be set when higher precision is required, any two parameters can be set when higher efficiency is required, the detection precision and efficiency can be considered, and the flexibility of battery cell detection is improved. Through carrying out the shooting of second time to electric core, can detect out whether the diaphragm of electric core has the condition of rolling over, further improve the accuracy that electric core detected.
The embodiment of the application takes the detection of the special-shaped battery cell as an example for explanation, the special-shaped battery cell has a special-shaped part, whether the special-shaped battery cell is qualified or not is detected, whether the position of a surface layer pole piece of the special-shaped battery cell is qualified or not needs to be detected, and whether the pole piece at the lower layer of the diaphragm is exposed or not is detected. Therefore, a mesoporous surface light source is added to irradiate the battery cell, and whether black spots appear in the diaphragm area is detected, so that whether the lower-layer pole piece is exposed is judged.
In the embodiment of the present application, a detection table is divided into four image acquisition regions, please refer to fig. 4, and fig. 4 is a schematic diagram of a detection angular position provided in the embodiment of the present application, a dotted rectangle in the diagram is the corresponding four image acquisition regions, a square with a mark in each image acquisition region is a camera arranged in the image acquisition region, a solid line seals an irregular pattern to be a special-shaped battery cell to be detected, and numbers around the solid line seals the irregular pattern represent corresponding angular positions.
The method comprises the steps that a camera is arranged above each image acquisition area, a point light source, a strip light source and a hollow hole surface light source are arranged on a detection platform, after all cameras are shot, three sections of interval data can be selected from each angle position according to 11 preset angle positions to calculate the values of AS and AC, data closest to preset parameter values are used for analysis, in the actual detection process, the effects of a surface layer pole piece and an isolation film are stable, the problem of edge grabbing errors basically cannot occur, therefore, one edge of main detection is a lower layer pole piece, the condition of misjudgment is easily caused due to the fact that the lower layer pole piece is wrapped by the isolation film, and therefore three sections of interval data are selected for analysis, and the line segment with the result being the preset standard value is judged.
Meanwhile, at least two parameters of different polarities, different contrasts and different neglected points are set for the special-shaped part of the angular position 11 to analyze the interval data of the angular position 11, the special-shaped part in the embodiment of the application takes a circular arc as an example, in the embodiment, the adopted parameters can be specifically selected according to actual conditions, three parameters can be set for analysis when higher precision is required, and any two parameters in the three parameters can be adopted for analysis when higher detection speed is required. In the actual detection process, the most common cause of misjudgment of the special-shaped part is the cause of diaphragm blacking caused by diaphragm tilting, wrinkling or poor laser cutting, so that three parameters can be set for the arc part to compare the distance between the arc of the anode sheet and the arc of the cathode sheet, and whether the battery cell is qualified is detected.
After the first shooting, the mesoporous area light source is opened, the second shooting is carried out to obtain second image data, when the diaphragm is folded, black spots can appear in the diaphragm area, and the black spots are the exposed lower-layer pole pieces.
And inputting the image data acquired twice to a processing terminal, and judging whether the battery cell is qualified.
It should be understood that the implementation steps of the anomaly detection provided in the embodiments of the present application are only illustrative, and in the implementation process, the anomaly part may be in other types of shapes, and should not be limited to the shapes set forth in the embodiments of the present application. The number and distribution of the cameras may also be specifically set according to actual situations, and the protection scope of the present application should not be limited to the embodiments provided in the present application.
Based on the same inventive concept, the embodiment of the application provides a battery cell detection and light distribution method, which comprises the following steps:
at least two strip-shaped light sources are arranged around the battery cell respectively, and the strip-shaped light sources and the battery cell are located on the same horizontal plane.
The battery cell is irradiated by a point light source, the point light source is arranged between the battery cell and the camera device in the vertical direction, and the point light source is arranged outside the visual field of the camera device in the horizontal direction, so that when the battery cell is detected, based on the irradiation of the bar-shaped light source and the point light source, the first image data of the battery cell is acquired.
The rectangular detection table is taken as an example in the embodiment of the application, and the reference to fig. 4 is combined, so that strip-shaped light sources can be arranged on four edges of the detection table respectively, the strip-shaped light sources are arranged at low angles, the installation positions and the battery cells to be detected are located on the same horizontal plane, the point light sources can be arranged above the battery cells in an inclined mode, and light supplement can be performed on special-shaped portions of the battery cells. Both the bar light source and the point light source may be red light.
Therefore, the strip light source is lowered to improve the compatibility of light, the strip light source can be suitable for the electric core with poor hot pressing or edge wrinkles, the strip light source and the electric core are located on the same horizontal plane to highlight the outline characteristics of the edge of the electric core, and a cathode sheet, an anode sheet and a diaphragm of the electric core are more clearly displayed, so that the influence of the diaphragm on the electric core detection can be reduced, and the electric core detection precision is improved. Carry out the light filling through the pointolite, also be favorable to the special-shaped partial edge analysis of grabbing of electric core, can improve electric core detection accuracy.
Optionally, the method may further include:
and a mesopore area light source is arranged below a lens of the camera device, and the camera device shoots the battery cell through a through hole of the mesopore area light source so as to acquire second image data of the battery cell under the irradiation of the mesopore area light source.
The battery core can be subjected to laser cutting during processing, the laser cutting can easily cause the battery core diaphragm to turn over, and the battery core after turning over can cause the pole pieces on the lower layer of the battery core diaphragm to be exposed, so that the quality of the battery core is influenced. And a plane light source is adopted to irradiate the battery cell, and if the diaphragm is folded, black spots appear in the diaphragm area of the image.
Therefore, whether the diaphragm is folded or not can be effectively detected by additionally arranging the mesoporous area light source, namely whether the diaphragm area of the battery cell is exposed out of the lower-layer pole piece or not is detected, and the detection accuracy is improved.
Further, the wavelength range of the strip light source and the point light source is 625-.
The light with the wavelength range of 625-630 angstroms has good penetrability, can penetrate through the diaphragm to polish the anode sheet, does not require the configuration of a camera, and has high practicability, and when the color temperature of the mesoporous area light source is 4500-6500 Kelvin, an image shot by the black and white camera is the color of positive white light.
Based on the same inventive concept, an embodiment of the present application further provides a battery cell detection apparatus 50, please refer to fig. 5, where fig. 5 is a schematic structural diagram of the battery cell detection apparatus provided in the embodiment of the present application, and the battery cell detection apparatus 50 may include:
the first image acquisition module 51 is configured to acquire first image data of at least two angular positions of a battery cell according to a positioning position of the battery cell, where the battery cell includes a cathode sheet, a separator, and an anode sheet stacked in a vertical direction.
A measuring module 52 for measuring a first distance in the horizontal direction between the co-angular edges of the anode sheet and the separator and a second distance in the horizontal direction between the co-angular edges of the cathode sheet and the anode sheet.
And the determining module 53 is configured to detect whether the position of the cell surface layer pole piece is qualified based on the first distance and/or the second distance.
Optionally, the battery cell detection apparatus 50 may further include a positioning module, where the positioning module is configured to grasp two adjacent edges of the diaphragm, and obtain a positioning position of the battery cell based on the two adjacent edges of the diaphragm.
Optionally, the measurement module 52 may also be configured to:
controlling a mesoporous surface light source to irradiate the electric core, and acquiring second image data of the electric core;
detecting whether the separator area of the cell is exposed to the anode sheet or the cathode sheet based on the second image data.
Optionally, the measurement module 52 may be specifically configured to:
and for the special-shaped part of the battery core, comparing the first image data of the special-shaped part based on inspection parameters to detect whether the position of the special-shaped part of the surface layer pole piece is qualified or not, wherein the inspection parameters comprise at least two items of polarity, contrast and neglected points.
Based on the same inventive concept, an embodiment of the present application further provides an electronic device, where the electronic device includes a memory and a processor, where the memory stores program instructions, and the processor executes the steps in any one of the above implementation manners when reading and executing the program instructions.
Based on the same inventive concept, an embodiment of the present application further provides a storage medium, where the readable storage medium stores computer program instructions, and the computer program instructions are read by a processor and executed to perform the steps in any of the above implementation manners.
The storage medium may be a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), or other media capable of storing program codes. The storage medium is used for storing a program, and the processor executes the program after receiving an execution instruction.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
Alternatively, all or part of the implementation may be in software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A battery cell detection method is characterized by comprising the following steps:
acquiring first image data of at least two angular positions of an electric core according to a positioning position of the electric core, wherein the electric core comprises a cathode sheet, a diaphragm and an anode sheet which are stacked along a vertical direction;
measuring a first distance of the co-angular edges of the anode sheet and the separator in the horizontal direction and a second distance of the co-angular edges of the cathode sheet and the anode sheet in the horizontal direction;
and detecting whether the position of the cell surface layer pole piece is qualified or not based on the first distance and/or the second distance.
2. The method of claim 1, wherein prior to the acquiring the first image data of the at least two angular positions of the cell according to the positioning position of the cell, the method comprises:
grabbing two adjacent edges of the membrane;
and acquiring the positioning position of the battery cell based on two adjacent edges of the diaphragm.
3. The method of claim 1, further comprising:
irradiating the electric core by adopting a mesoporous area light source, and acquiring second image data of the electric core;
detecting whether the separator area of the cell is exposed to the anode sheet or the cathode sheet based on the second image data.
4. The method of claim 1, wherein the cell is a profiled cell, the method further comprising:
and for the special-shaped part of the battery core, comparing the first image data of the special-shaped part based on inspection parameters to detect whether the position of the special-shaped part of the surface layer pole piece is qualified or not, wherein the inspection parameters comprise at least two items of polarity, contrast and neglected points.
5. A cell detection light distribution method is characterized by comprising the following steps:
at least two strip-shaped light sources are respectively arranged around the battery cell, and the strip-shaped light sources and the battery cell are positioned on the same horizontal plane;
the battery cell is irradiated by a point light source, the point light source is arranged between the battery cell and the camera device in the vertical direction, and the point light source is arranged outside the visual field of the camera device in the horizontal direction, so that when the battery cell is detected, based on the irradiation of the bar-shaped light source and the point light source, the first image data of the battery cell is acquired.
6. The method of claim 5, further comprising:
and a mesopore area light source is arranged below a lens of the camera device, and the camera device shoots the battery cell through a through hole of the mesopore area light source so as to acquire second image data of the battery cell under the irradiation of the mesopore area light source.
7. The method as claimed in claim 6, wherein the wavelength of the strip light source and the point light source is in the range of 625-630 angstroms, and the color temperature of the mesoporous surface light source is in the range of 4500-6500 Kelvin.
8. The utility model provides a battery cell detection device which characterized in that includes:
the first image acquisition module is used for acquiring first image data of at least two angular positions of the battery cell according to the positioning position of the battery cell, and the battery cell comprises a cathode sheet, a diaphragm and an anode sheet which are stacked in the vertical direction;
the measuring module is used for measuring a first distance of the same-angle position edges of the anode sheet and the diaphragm in the horizontal direction and a second distance of the same-angle position edges of the cathode sheet and the anode sheet in the horizontal direction;
and the judging module is used for detecting whether the position of the cell surface layer pole piece is qualified or not based on the first distance and/or the second distance.
9. An electronic device comprising a memory having stored therein program instructions and a processor that, when executed, performs the steps of the method of any of claims 1-7.
10. A storage medium having stored thereon computer program instructions for executing the steps of the method according to any one of claims 1 to 7 when executed by a processor.
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