Method and equipment for detecting battery cell pole piece of lithium ion battery
By cutting and processing the X-ray transmission image of the battery cell pole chip on the same X-ray device, simultaneous measurement of the alignment of the lithium-ion battery angular pole chip and the fold of the main pole chip is achieved, and the equipment in the prior art is solved The problem of multiple and high costs improves detection efficiency and accuracy.
Patent Information
- Application Number
- CN202411232354.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-01-10
AI Technical Summary
In the prior art, the detection of the angular pole plate alignment and main pole plate folds of lithium-ion cells requires the use of two different X-ray equipment, resulting in large investment in human resources, high cost and increased operational difficulty.
By obtaining the X-ray transmission image of the electrode plate to be tested, cropping to obtain the angular electrode plate image and the main electrode plate image, and through image processing techniques such as contrast and brightness enhancement, diagonal electrode on the same device is achieved The sheet alignment and body pole folds are measured simultaneously.
The battery cell measurement process has been optimized, human resources and cost expenditure have been reduced, defects in using two devices have been avoided, and detection efficiency and accuracy have been improved.
Smart Images
Figure CN119290923A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery testing, and in particular to a method and device for testing a cell electrode of a lithium-ion battery. Background Art
[0002] During the preparation of lithium-ion batteries, the alignment of the corner pole pieces of the battery core and whether there are wrinkles on the main pole pieces are key parameters in the battery manufacturing process and are also important indicators for determining whether the battery is qualified. Therefore, testing the alignment of the corner pole pieces of the battery core and whether there are wrinkles on the main pole pieces of the lithium-ion battery cells is one of the important processes in the preparation of lithium-ion batteries.
[0003] Currently, the monitoring items for the internal winding core of lithium-ion batteries are to detect the alignment of the corner pole pieces and the wrinkles of the main pole pieces, and the equipment used is X-ray equipment.
[0004] However, in the prior art, the detection of the alignment of the diagonal pole pieces and the detection of whether the battery cell body is wrinkled require the use of two different X-ray devices, which not only requires a large investment of human resources and increases the difficulty of operation, but also requires a very high cost for purchasing the equipment. Summary of the invention
[0005] The main purpose of the embodiments of the present application is to propose a method for measuring the angular pole piece alignment and the main pole piece wrinkles, aiming to optimize the battery cell measurement process and human resource allocation and reduce cost expenditure.
[0006] In a first aspect, a method for detecting a cell electrode of a lithium-ion battery is provided, comprising:
[0007] Obtaining an X-ray transmission image of the electrode piece of the battery cell to be tested;
[0008] cropping the X-ray transmission image to obtain an angular pole piece image and a main pole piece image;
[0009] Detecting the angular alignment of the electrode piece of the battery cell to be tested by using the angular electrode piece image to obtain an angular alignment detection result;
[0010] The wrinkles of the main body of the electrode piece of the battery cell to be tested are detected through the main body electrode piece image to obtain the main body electrode piece wrinkle detection result.
[0011] Through the method provided in the first aspect, the angular pole piece alignment and body pole piece wrinkles of the lithium-ion battery can be measured simultaneously on the same device, thereby optimizing the battery cell measurement process and human resource allocation and reducing cost expenditure.
[0012] In a possible manner, detecting the angular alignment of the electrode piece of the battery cell to be tested by using the angular electrode piece image to obtain the angular alignment detection result includes:
[0013] Performing contrast enhancement processing on the angular pole piece image to obtain an enhanced angular pole piece image;
[0014] The angular alignment of the electrode piece of the cell to be tested is detected by the enhanced angular electrode piece image to obtain an angular alignment detection result. The angular electrode piece image is subjected to contrast enhancement processing to obtain an enhanced angular electrode piece image, which can more clearly observe the angular positive and negative electrode pieces, and the layers of the electrode pieces are more distinct.
[0015] In a possible manner, detecting wrinkles of the main body of the electrode piece of the battery cell to be tested by using the main body electrode piece image to obtain a main body electrode piece wrinkle detection result includes:
[0016] Performing brightness enhancement processing on the subject pole piece image to obtain an enhanced subject pole piece image;
[0017] The wrinkles of the main body of the electrode piece of the battery cell to be tested are detected by the enhanced main body electrode piece image to obtain the main body electrode piece wrinkle detection result. The main body electrode piece image is subjected to brightness enhancement processing to obtain an enhanced main body electrode piece image, which can more clearly observe the wrinkles inside the main body electrode piece.
[0018] In one possible manner, the corner pole piece images include upper left, lower left, upper right and lower right corner pole piece images.
[0019] In one possible manner, the X-ray transmission image is cropped to obtain an angular pole piece image and a main pole piece image, including:
[0020] Dividing the X-ray transmission image into upper left, lower left, upper right and lower right regions;
[0021] The X-ray transmission image is cropped according to the divided areas to obtain regional images of the upper left, lower left, upper right and lower right areas of the electrode piece of the battery cell to be tested;
[0022] identifying a main body portion and a corner portion from the regional image;
[0023] The regional image is cropped according to the main body portion and the corner portion to obtain the corner pole piece image and the main body pole piece image.
[0024] In a second aspect, an X-ray device is provided, comprising: a processor and a memory, wherein the memory stores a program, and when the program is read and executed by the processor, a method for detecting a cell electrode of a lithium-ion battery is implemented.
[0025] In a third aspect, a computer storage medium is provided, wherein the computer storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement a method for detecting a cell electrode of a lithium-ion battery.
[0026] In a fourth aspect, an X-ray device is provided, comprising:
[0027] An X-ray light source is used to irradiate X-rays to the electrode pieces of the battery cell to be tested placed on the test table;
[0028] An intensifier is used to detect the X-rays transmitted from the electrode of the battery cell to be tested, and to amplify and enhance the X-ray transmission image;
[0029] The processor is used to crop the X-ray transmission image to obtain an angular pole piece image and a main body pole piece image, detect the angular alignment of the pole piece of the battery cell to be tested through the angular pole piece image to obtain an angular alignment detection result, and detect the wrinkles of the main body of the pole piece of the battery cell to be tested through the main body pole piece image to obtain a main body pole piece wrinkle detection result.
[0030] By using the same device to inspect the four areas of the battery cell one by one, it is possible to measure the angular pole piece alignment and body pole piece wrinkles of the lithium-ion battery on the same device, thereby optimizing the battery cell measurement process and human resource allocation and reducing cost expenditure.
[0031] In a possible implementation, the power of the X-ray light source is 110 Kv or above.
[0032] In one possible implementation, the intensifier is a flat panel detector. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 is a schematic diagram of an X-ray transmission image provided in an embodiment of the present application;
[0034] Figure 2 Schematic diagram of four regions of the battery cell measurement range provided in the embodiment of the present application;
[0035] Figure 3 : is a cropped schematic diagram of an X-ray transmission image of the upper right area of the cell measurement range provided in an embodiment of the present application, wherein the cropped image A is a test schematic diagram of the angular pole piece alignment, and the cropped image B is a test schematic diagram of the main pole piece wrinkle;
[0036] Figure 4 It is a schematic diagram of the hardware structure of the X-ray device provided in the embodiment of the present application. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0038] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.
[0040] During the preparation of lithium-ion batteries, the alignment of the corner pole pieces of the battery core and whether there are wrinkles on the main pole pieces are key parameters in the battery manufacturing process and are also important indicators for determining whether the battery is qualified. Therefore, testing the alignment of the corner pole pieces of the battery core and whether there are wrinkles on the main pole pieces of the lithium-ion battery cells is one of the important processes in the preparation of lithium-ion batteries.
[0041] Currently, the monitoring items for the internal winding core of lithium-ion batteries are to detect the alignment of the corner pole pieces and the wrinkles of the main pole pieces, and the equipment used is X-ray equipment.
[0042] However, in the prior art, the detection of the alignment of the diagonal pole pieces and the detection of whether the battery cell body is wrinkled require the use of two different X-ray devices, which not only requires a large investment of human resources and increases the difficulty of operation, but also requires a very high cost for purchasing the equipment.
[0043] Based on this, the present application provides a method and device for detecting battery cell pole pieces of a lithium-ion battery, by obtaining an X-ray transmission image of the battery cell pole piece to be tested, cropping the X-ray transmission image of the battery cell pole piece to be tested to obtain an angular pole piece image and a main body pole piece image, detecting the angular alignment of the battery cell pole piece to be tested through the angular pole piece image to obtain an angular alignment detection result, detecting the wrinkles of the main body of the battery cell pole piece to be tested through the main body pole piece image to obtain a main body pole piece wrinkle detection result, and realizing measurement of the angular pole piece alignment and body pole piece wrinkles of the lithium-ion battery on the same device, optimizing the battery cell measurement process, reducing cost expenditure, and avoiding the problem that the detection of the diagonal pole piece alignment and the detection of whether the battery cell body is wrinkled in the prior art require the use of two different X-ray devices, which requires a large human resource investment, increases the difficulty of operation, and the cost required for purchasing the equipment is also very high.
[0044] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments of the present invention are further described below in conjunction with the accompanying drawings.
[0045] First, as Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a method for detecting battery cell pole pieces of a lithium-ion battery, including but not limited to: obtaining an X-ray transmission image of the battery cell pole piece to be tested; cropping the X-ray transmission image to obtain an angular pole piece image and a main body pole piece image; detecting the angular alignment of the battery cell pole piece to be tested through the angular pole piece image to obtain an angular alignment detection result; detecting wrinkles of the main body of the battery cell pole piece to be tested through the main body pole piece image to obtain a main body pole piece wrinkle detection result.
[0046] Through the method provided in the first aspect, it is possible to measure the alignment of the angular pole pieces and the wrinkles of the body pole pieces of a lithium-ion battery on the same device, thereby optimizing the battery cell measurement process, reducing cost expenditure, and avoiding the problem in the prior art that two different X-ray devices are required to detect the alignment of the angular pole pieces and whether the battery cell body is wrinkled, which requires a large investment of human resources, increases the difficulty of operation, and the cost of purchasing the equipment is also very high.
[0047] like Figure 1 and Figure 3 As shown, in one possible manner, the angular alignment of the electrode piece of the battery cell to be tested is detected by the angular pole piece image to obtain an angular alignment detection result, including: performing contrast enhancement processing on the angular pole piece image to obtain an enhanced angular pole piece image; detecting the angular alignment of the electrode piece of the battery cell to be tested by the enhanced angular pole piece image to obtain an angular alignment detection result.
[0048] In fact, in transmission X-ray imaging, the X-rays emitted by the X-ray source penetrate the battery cell and are received by the detector. Different parts of the battery cell absorb X-rays to different degrees, thus forming different images on the detector. These images reflect the structural information inside the battery cell, including the relative position relationship of the pole pieces. The angular pole piece image is subjected to contrast enhancement processing to obtain an enhanced angular pole piece image, which can more clearly observe the angular positive and negative pole pieces, and the layers of the pole pieces are more distinct.
[0049] Angular alignment directly affects the stability and consistency of the internal structure of the battery cell. If the alignment is poor, it may cause safety hazards such as short circuits and leakage inside the battery cell, thereby reducing the performance and service life of the battery cell. Good alignment can reduce stress concentration inside the battery cell and improve the cycle stability and safety of the battery cell.
[0050] In one possible approach, Figure 1 and Figure 3 As shown, the wrinkles of the main body of the electrode piece of the battery cell to be tested are detected by the main electrode piece image to obtain the main body electrode piece wrinkle detection result, including: performing brightness enhancement processing on the main body electrode piece image to obtain an enhanced main body electrode piece image; detecting the wrinkles of the main body of the electrode piece of the battery cell to be tested by the enhanced main body electrode piece image to obtain the main body electrode piece wrinkle detection result.
[0051] In fact, in transmission X-ray imaging, the X-rays emitted by the X-ray source penetrate the battery cell and are received by the detector. Different parts inside the battery cell absorb X-rays to different degrees, thus forming different images on the detector. These images reflect the structural information inside the battery cell, including the relative position relationship of the pole pieces. The main pole piece image is subjected to brightness enhancement processing to obtain an enhanced main pole piece image, which can more clearly observe the internal wrinkles of the main pole piece.
[0052] The wrinkles on the main pole piece may cause short circuits, open circuits and other faults inside the battery cell, thus causing safety hazards. By measuring the wrinkles, these problems can be discovered and handled in a timely manner to ensure the safety of the battery cell. The wrinkles will affect the flatness and consistency of the internal structure of the battery cell, which in turn affects the charge and discharge performance and cycle stability of the battery cell. By reducing the wrinkles, the overall performance and service life of the battery cell can be improved.
[0053] like Figure 2 As shown, in one possible manner, the corner pole piece images include upper left, lower left, upper right and lower right corner pole piece images.
[0054] like Figure 2 and Figure 3As shown, in one possible manner, the X-ray transmission image is cropped to obtain an angular pole piece image and a main pole piece image, including: dividing the X-ray transmission image into upper left, lower left, upper right and lower right regions; cropping the X-ray transmission image according to the divided regions to obtain regional images of the upper left, lower left, upper right and lower right regions of the electrode piece of the battery cell to be tested; identifying a main part and an angular part from the regional images; cropping the regional image according to the main part and the angular part to obtain the angular pole piece image and the main pole piece image.
[0055] By cropping the X-ray transmission image to obtain the angular pole piece image and the main body pole piece image, the angular alignment of the battery cell pole piece and the wrinkle of the main body pole piece can be measured on the same X-ray device for the angular pole piece image and the main body pole piece image respectively, so as to solve the problem in the prior art that two different X-ray devices are required to detect the alignment of the angular pole piece and whether the battery cell body is wrinkled.
[0056] like Figure 4 FIG. 1 is a schematic diagram of the hardware structure of an X-ray device provided according to an embodiment of the present application. The X-ray device includes: a memory, a processor, and a computer program (not shown in the figure) stored in the memory and executable on the processor. The processor and the memory may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.
[0057] The non-transient software program and instructions required to implement the machine translation device in the above embodiment are stored in the memory, and when executed by the processor, the method for detecting the cell electrode of a lithium-ion battery provided in any embodiment of the present application is executed.
[0058] An embodiment of the present application also provides a computer program product, including a computer program or computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the method for detecting the cell pole piece of a lithium-ion battery provided in any embodiment of the present application.
[0059] The system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of the system architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.
[0060] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
[0061] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.
[0062] In a fourth aspect, an X-ray device is provided, comprising: an X-ray light source, for irradiating X-rays to a pole piece of a battery cell to be tested placed on a test table; an intensifier, for detecting X-rays transmitted from the pole piece of the battery cell to be tested and generating an X-ray transmission image; and a processor, for cropping the X-ray transmission image to obtain an angular pole piece image and a main body pole piece image, detecting the angular alignment of the pole piece of the battery cell to be tested through the angular pole piece image to obtain an angular alignment detection result, and detecting the wrinkles of the main body of the pole piece of the battery cell to be tested through the main body pole piece image to obtain a main body pole piece wrinkle detection result.
[0063] Through the equipment provided in the fourth aspect, it is possible to measure the alignment of the angular pole pieces and the wrinkles of the body pole pieces of the lithium-ion battery on the same device, thereby optimizing the battery cell measurement process, reducing cost expenditure, and avoiding the problem that the prior art requires the use of two different X-ray devices for detecting the alignment of the angular pole pieces and detecting whether the battery cell body is wrinkled, which requires a large investment of human resources, increases the difficulty of operation, and the cost of purchasing the equipment is also very high.
[0064] In a possible implementation, there is a process for detecting a cell electrode of a lithium-ion battery according to an embodiment of the present invention, including but not limited to:
[0065] S100, the robot moves the battery cell to the testing position.
[0066] S200, irradiating the battery cell with an X-ray light source.
[0067] S300, X-ray projection is photographed by a camera and displayed on a flat panel detector.
[0068] The X-ray light source can perform contrast enhancement processing on the angular pole piece image to obtain an enhanced angular pole piece image, which can more clearly observe the positive and negative pole pieces at the angular position, and the layers of the pole pieces are more distinct; and can perform brightness enhancement processing on the body pole piece image to obtain an enhanced main body pole piece image, which can more clearly observe the internal wrinkles of the main body pole piece.
[0069] S400, obtaining images of the corner electrode piece and the main electrode piece of the battery cell on a flat panel detector.
[0070] The flat-panel detector increases the field of view of the X-ray device, capturing the corners of the battery cell and the main area inside the corners, making it possible to observe the corner pole area and the main pole area of the battery cell simultaneously on the same X-ray device.
[0071] S500, the processor of the X-ray device crops the obtained image into an image of the alignment of the corner test pole piece and an image of the wrinkle of the main body test pole piece.
[0072] S600, the processor of the X-ray equipment uses two systems to test the alignment of the angular pole piece and pay attention to the pole piece wrinkles on the two pictures.
[0073] By cropping the image obtained by the processor of the X-ray device, a picture of the angular test pole piece alignment and a picture of the main body test pole piece wrinkle are obtained, and by using two systems to test the angular pole piece alignment and pay attention to the pole piece wrinkles on the two pictures respectively, it is possible to use the same X-ray device to measure the angular alignment of the battery cell pole piece and the main body pole piece wrinkles of the obtained angular pole piece image and the main body pole piece image respectively, so as to solve the problem in the prior art that two different X-ray devices are required to detect the diagonal pole piece alignment and whether the battery cell body is wrinkled.
[0074] S700. Repeat the above steps to test the four areas of the battery cell measurement range respectively.
[0075] In a possible implementation, the power of the X-ray light source is 110 Kv or above.
[0076] In fact, the use of a high-power X-ray light source can produce higher energy X-rays, which have a stronger penetration depth in the same material. For samples such as battery cell pole pieces that may have a multi-layer structure or thicker materials, high-power light tubes can ensure that the X-rays penetrate completely, thereby obtaining more comprehensive internal structure information. For example, in some embodiments of the present application, the use of a high-power X-ray light source can perform contrast enhancement processing on the angular pole piece image to obtain an enhanced angular pole piece image, which can more clearly observe the angular positive and negative pole pieces, and the layers of the pole pieces are more distinct; and the body pole piece image can be brightness enhanced to obtain an enhanced main body pole piece image, which can more clearly observe the internal wrinkles of the main body pole piece.
[0077] In one possible implementation, the intensifier is a flat panel detector.
[0078] In fact, flat-panel detectors can directly convert X-rays into digital signals without the need for an intermediate optical conversion step. This direct conversion method improves the sensitivity and resolution of imaging, allowing the fine structures and defects inside the battery cell pole piece to be captured and displayed more clearly. In addition, the data acquisition speed of the flat-panel detector is very fast, and image acquisition and processing can be completed within a few seconds, greatly improving the detection efficiency. In addition, the imaging area of the flat-panel detector is uniform and has no edge geometric deformation, ensuring the overall consistency and accuracy of the battery cell pole piece image, and the generated image has high contrast and good clarity, which can clearly display the material distribution, structural hierarchy and defect characteristics inside the battery cell pole piece.
[0079] The flat panel detector also enhances the test field of view of the X-ray device, for example, in some embodiments of the present application, such as Figure 1 As shown, Figure 1 A schematic diagram of an X-ray transmission image provided in an embodiment of the present application shows that, since the intensifier of the X-ray device uses a flat-panel detector, the field of view of the image is increased, and the angular position of the battery cell and the main body area inside the angular position are captured, thereby achieving simultaneous observation of the angular pole piece area and the main body pole piece area of the battery cell on the same X-ray device.
[0080] The above describes some embodiments of the present application with reference to the accompanying drawings, but does not limit the scope of the present invention. Any modification, equivalent substitution and improvement made by those skilled in the art without departing from the scope and essence of the present invention shall be within the scope of the present application.
[0081] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
[0082] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.
[0083] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.
[0084] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0085] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0086] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the rights of the present application is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application should be within the scope of the rights of the present application.
Claims
1. A method for detecting a cell electrode of a lithium-ion battery, characterized in that: The method comprises: Obtaining an X-ray transmission image of the electrode piece of the battery cell to be tested; cropping the X-ray transmission image to obtain an angular pole piece image and a main pole piece image; Detecting the angular alignment of the electrode piece of the battery cell to be tested by using the angular electrode piece image to obtain an angular alignment detection result; The wrinkles of the main body of the electrode piece of the battery cell to be tested are detected through the main body electrode piece image to obtain the main body electrode piece wrinkle detection result.
2. The method according to claim 1, characterized in that The step of detecting the angular alignment of the electrode piece of the cell to be tested by using the angular electrode piece image to obtain the angular alignment detection result includes: Performing contrast enhancement processing on the angular pole piece image to obtain an enhanced angular pole piece image; The angular alignment of the electrode piece of the battery cell to be tested is detected by using the enhanced angular electrode piece image to obtain an angular alignment detection result.
3. The method according to claim 1, characterized in that The method of detecting wrinkles of the main body of the electrode piece of the battery cell to be tested by using the main body electrode piece image to obtain a main body electrode piece wrinkle detection result includes: Performing brightness enhancement processing on the subject pole piece image to obtain an enhanced subject pole piece image; The wrinkles of the main body of the electrode piece of the battery cell to be tested are detected by using the enhanced main body electrode piece image to obtain a main body electrode piece wrinkle detection result.
4. The method according to claim 1, characterized in that: The corner pole piece images include upper left, lower left, upper right and lower right corner pole piece images.
5. The method according to claim 1, characterized in that The step of cropping the X-ray transmission image to obtain an angular pole piece image and a main pole piece image comprises: Dividing the X-ray transmission image into upper left, lower left, upper right and lower right regions; The X-ray transmission image is cropped according to the divided areas to obtain regional images of the upper left, lower left, upper right and lower right areas of the electrode piece of the battery cell to be tested; identifying a main body portion and a corner portion from the regional image; The regional image is cropped according to the main body portion and the corner portion to obtain the corner pole piece image and the main body pole piece image.
6. An X-ray device, characterized in that: include: A processor and a memory, wherein the memory stores a program, and when the program is read and executed by the processor, the method for detecting a cell electrode of a lithium-ion battery as claimed in any one of claims 1 to 5 is implemented.
7. A computer storage medium, characterized in that: The computer storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the method for detecting the cell pole piece of a lithium-ion battery as described in any one of claims 1 to 5.
8. An X-ray device, characterized in that: include: An X-ray light source is used to irradiate X-rays to the electrode pieces of the battery cell to be tested placed on the test table; An intensifier is used to detect the X-rays transmitted from the electrode of the battery cell to be tested, and to amplify and enhance the X-ray transmission image; The processor is used to crop the X-ray transmission image to obtain an angular pole piece image and a main body pole piece image, detect the angular alignment of the pole piece of the battery cell to be tested through the angular pole piece image to obtain an angular alignment detection result, and detect the wrinkles of the main body of the pole piece of the battery cell to be tested through the main body pole piece image to obtain a main body pole piece wrinkle detection result.
9. The X-ray device according to claim 8, characterized in that The power of the X-ray light source is 110Kv or above.
10. The X-ray device according to claim 8, characterized in that The intensifier is a flat panel detector.
Citation Information
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