Battery detection equipment, battery detection method, battery production equipment and battery production method

Abstract

The invention provides a battery detection device, a detection method, a battery production device and a method.The battery detection device comprises a radiation source, a detector, a bearing part and a detection unit, and the bearing part is arranged between the radiation source and the detector and used for bearing a to-be-detected battery; rays emitted by the ray source are projected to the detector through a to-be-detected battery placed on the bearing component, the detector is used for obtaining a first detection image and a second detection image of the to-be-detected battery based on the received rays, and the ray source is used for being located on the side where the first surface of the to-be-detected battery is located to obtain the first detection image of the to-be-detected battery. The radiation source is also used for being located on the other side of the second surface of the to-be-detected battery to obtain a second detection image of the to-be-detected battery, and the first surface and the second surface are used for detecting defects of the to-be-detected battery relative to the first detection image and the second detection image.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery testing device, a testing method, and a battery production device and method. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the production process of batteries, various defects will occur, which will affect the quality and safety of the batteries. Therefore, it is of great significance to detect battery defects. However, the current defect detection methods have the problem of low accuracy. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a battery detection device, a detection method, a battery production device and a method to solve the problem that the battery defects cannot be accurately detected in the related art.

[0005] An embodiment of the first aspect of the present application provides a battery detection device, which includes a radiation source, a detector, a carrying component and a detection unit, wherein the carrying component is arranged between the radiation source and the detector, and is used to carry a battery to be tested, the radiation emitted by the radiation source is projected to the detector through the battery to be tested placed on the carrying component, and the detector is used to obtain a detection image of the battery to be tested based on the received radiation, wherein the detection image includes a first detection image and a second detection image, the radiation source is configured to be located on a side where a first surface of the battery to be tested placed on the carrying component is located to obtain a first detection image of the battery to be tested, and the radiation source is also configured to be located on the other side where a second surface of the battery to be tested placed on the carrying component is located to obtain a second detection image of the battery to be tested, the first surface is opposite to the second surface; the first detection image and the second detection image are used for defect detection of the battery to be tested.

[0006] In the technical solution of the embodiment of the present application, by acquiring a first detection image and a second detection image of the battery to be tested on the side where the first surface of the battery to be tested is located and the side where the second surface of the battery to be tested is located, and performing defect detection on the battery to be tested based on the first detection image and the second detection image, the problem of being unable to detect battery defects due to the overlap of defects of the battery to be tested with distorted areas in the detection image can be solved, thereby improving the accuracy of the defect detection results of the battery to be tested.

[0007] In some embodiments, the detection unit is connected to the detector, and the detection unit is used to perform defect detection on the battery to be tested based on the first detection image and the second detection image. By performing defect detection on the battery to be tested by the detection unit, the efficiency of defect detection on the battery to be tested can be improved.

[0008] In some embodiments, the battery testing device includes a first driving mechanism, and the first driving mechanism is used to drive the bearing component to rotate to switch the relative position of the radiation source and the battery to be tested placed on the bearing component, so that the radiation source is located on the side where the first surface of the battery to be tested is located or on the other side where the second surface of the battery to be tested is located. By driving the bearing component to rotate by the first driving mechanism, the radiation source can be located on the side where the first surface of the battery to be tested is located to obtain a first detection image of the battery to be tested and on the side where the second surface of the battery to be tested is located to obtain a second detection image of the battery to be tested, which simplifies the acquisition process of the detection image of the battery to be tested, thereby improving the efficiency of defect detection of the battery to be tested.

[0009] In some embodiments, the battery testing device further includes a second driving mechanism configured to drive the movement of the radiation source and the detector to switch the positional relationship of the radiation source and the detector relative to the bearing component, so that the radiation source is located on the side where the first surface of the battery to be tested is located or on the other side where the second surface of the battery to be tested is located. By driving the radiation source and the detector to move by the second driving mechanism, the battery testing device is more flexible, and the acquisition method of the test image of the battery to be tested is more diversified, thereby improving the efficiency of defect detection of the battery to be tested.

[0010] In some embodiments, the battery inspection device further includes a mechanical gripper, which is configured to flip the battery to be tested placed on the carrier so that the radiation source is located on the side where the first surface of the battery to be tested is located or on the other side where the second surface of the battery to be tested is located. The battery to be tested placed on the carrier is flipped by the mechanical gripper so that the radiation source can be located on the side where the first surface of the battery to be tested is located to obtain a first inspection image of the battery to be tested and on the side where the second surface of the battery to be tested is located to obtain a second inspection image of the battery to be tested. Since only the battery to be tested needs to be flipped, it is easy to implement and the flipping efficiency is high, thereby improving the efficiency of defect detection of the battery to be tested.

[0011] In some embodiments, the carrying component includes a carrying surface for carrying the battery to be tested, and the height direction of the battery to be tested placed on the carrying component is perpendicular to the carrying surface. By making the height direction of the battery to be tested placed on the carrying component perpendicular to the carrying surface, the mechanical gripper can more easily grasp the battery to be tested.

[0012] In some embodiments, the battery testing device includes a plurality of bearing components, and the battery testing device also includes an annular guide rail, and the plurality of bearing components are configured to be able to move sequentially along the annular guide rail to between the radiation source and the detector. By configuring the plurality of bearing components to be able to move sequentially along the annular guide rail to between the radiation source and the detector, the efficiency of the battery testing device in performing defect detection on the battery to be tested can be improved.

[0013] In some embodiments, the focal diameter D of the ray source satisfies: 0.5 mm ≤ D ≤ 0.9 mm. Thus, the requirements for the detection image resolution can be met and the shooting time can be shortened, which is more suitable for use in production lines.

[0014] In some embodiments, the edge of the projection area of ​​the radiation emitted by the radiation source on the plane where the detector is located is located inside the edge of the radiation detector. Selecting a larger detector can increase the magnification of the battery to be tested in the detection image, making it easier for the detection unit to detect defects in the battery to be tested through the detection image, and can also reduce the number of times the detection image is taken.

[0015] In some embodiments, the battery testing device further comprises a testing platform, and the ray source and the bearing component are arranged on the testing platform. By arranging the ray source and the bearing component on the testing platform, the structure of the battery testing device can be made more stable.

[0016] The second aspect of the present application provides a battery detection method, which includes the battery cell in the above embodiment. The detection method includes: obtaining a detection image including a battery to be tested obtained by shooting under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image obtained when the radiation source is located on the side where the first surface of the battery to be tested is located, and the second detection image is an image obtained when the radiation source is located on the other side where the second surface of the battery to be tested is located, and the first surface is opposite to the second surface; based on the first detection image and the second detection image, defect detection is performed on the battery to be tested to obtain defect information of the battery to be tested.

[0017] In some embodiments of the present application, by acquiring a first detection image and a second detection image of the battery to be tested on a side where the first surface of the battery to be tested is located and a side where the second surface of the battery to be tested is located, and performing defect detection on the battery to be tested based on the first detection image and the second detection image, the problem of being unable to detect battery defects due to overlap between defects of the battery to be tested and distorted areas in the detection image can be solved, thereby improving the accuracy of the defect detection results of the battery to be tested.

[0018] In some embodiments, defect detection is performed on the battery to be tested based on the first detection image and the second detection image to obtain defect information of the battery to be tested, including: inputting the first detection image and the second detection image into a defect detection model at the same time to obtain defect information of the battery to be tested output by the defect detection model. By inputting the first detection image and the second detection image into the defect detection model at the same time to obtain defect information of the battery to be tested output by the defect detection model, the efficiency of defect detection of the battery to be tested can be improved.

[0019] In some embodiments, the training process of the defect detection model includes: obtaining a sample detection image including a sample battery obtained by shooting under the irradiation of a radiation source, wherein the sample detection image includes a first sample detection image and a second sample detection image, the first sample detection image is an image obtained when the radiation source is located on the side where the first surface of the sample battery is located, and the second sample detection image is an image obtained when the radiation source is located on the other side where the second surface of the sample battery is located; marking the real defect information in the first sample detection image and the second sample detection image; inputting the first sample detection image and the second sample detection image into the defect detection model at the same time to obtain the predicted defect information of the sample battery output by the defect detection model; calculating the loss value based on the real defect information and the predicted defect information; and adjusting the parameters of the defect detection model based on the loss value. After the loss value is calculated based on the real defect information and the predicted defect information, the defect detection model is trained according to the loss value, and the relevant parameters in the defect detection model are adjusted, so that the defect detection model learns the difference between the predicted defect information and the real defect information according to the loss value during the iteration process, and the real defect information is more clearly defined, so that the defect detection model can output the same defect information as the real defect information when performing defect detection on the battery to be tested, and the detected defect information is more accurate.

[0020] In some embodiments, the defect information includes the defect type and the defect quantity. The defect information includes the defect type and the defect quantity, which can make the defect detection result clearer.

[0021] An embodiment of the third aspect of the present application provides a battery detection device, which includes: an image acquisition module, configured to acquire a detection image including a battery to be tested, which is taken under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image acquired when the radiation source is located on a side where a first surface of the battery to be tested is located, and the second detection image is an image acquired when the radiation source is located on the other side where a second surface of the battery to be tested is located, and the first surface is opposite to the second surface; a defect detection module is configured to perform defect detection on the battery to be tested based on the first detection image and the second detection image to obtain defect information of the battery to be tested.

[0022] The fourth aspect of the present application provides a method for producing a battery, the method comprising: using the battery detection method in the above embodiment to perform defect detection on the battery to be tested. Using the battery detection method in the above embodiment to perform defect detection on the battery to be tested can improve the efficiency of defect detection and the accuracy of defect detection results.

[0023] In some embodiments, the battery production method further includes: in response to the test result of the battery to be tested indicating that the battery to be tested is defective, the defective battery is removed. In response to the test result of the battery to be tested indicating that the battery to be tested is defective, the defective battery is removed, which is suitable for large-scale batch production testing and can prevent defective batteries from entering the market to a certain extent.

[0024] An embodiment of the fifth aspect of the present application provides an electronic device, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery detection method in the above-mentioned embodiment or the battery production method in the above-mentioned embodiment.

[0025] An embodiment of the sixth aspect of the present application provides a battery production device, including the electronic device in the above embodiment.

[0026] The embodiment of the seventh aspect of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the battery detection method in the above embodiment or the battery production method in the above embodiment.

[0027] An embodiment of the eighth aspect of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the battery detection method in the above embodiment or the battery production method in the above embodiment.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0030] Figure 1A schematic diagram of the structure of a battery testing device provided for some embodiments of the present application;

[0031] Figure 2 A schematic diagram of an imaging of a battery to be tested provided in some embodiments of the present application;

[0032] Figure 3 A schematic diagram of a detection image of a battery to be tested provided in some embodiments of the present application;

[0033] Figure 4 A schematic diagram of a first detection image provided for some embodiments of the present application;

[0034] Figure 5 A schematic diagram of a second detection image provided for some embodiments of the present application;

[0035] Figure 6 A schematic diagram of the structure of a battery testing device provided for other embodiments of the present application;

[0036] Figure 7 A schematic structural diagram of a ring guide rail provided for some embodiments of the present application;

[0037] Figure 8 A schematic diagram of the structure of another battery testing device provided for some embodiments of the present application;

[0038] Fig. 9 A flowchart of a battery detection method provided for some embodiments of the present application;

[0039] Fig.10 A flowchart of a defect detection model training process provided for some embodiments of the present application;

[0040] Fig.11 A block diagram of a battery detection device provided for some embodiments of the present application;

[0041] Fig.12 A flowchart of a battery production method provided for some embodiments of the present application;

[0042] Fig.13 A flow chart of another method for producing a battery provided for some embodiments of the present application.

[0043] Description of reference numerals:

[0044] 100, battery testing equipment; 110, radiation source; 120, detector; 130, carrying component; 140, detection unit; 150, battery to be tested; 151, first surface; 152, second surface; 160, circular guide rail; 170, testing platform; 310, first image; 320, second image; 330, distortion area. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0054] The battery consists of one or more cells. The production process of the battery includes coating of the electrode, winding of the cell, shelling and injection of the cell, etc. Various defects may occur in the production process of the battery, such as wrinkled electrode, folded head, cracked electrode and overlapped electrode, etc. These defects will affect the quality and safety of the battery. Therefore, it is of great significance to detect battery defects.

[0055] In some inspection scenarios, the defects of the battery can be detected by using a radiation source and a detector. The radiation emitted by the radiation source passes through the battery and forms an image on the detector. Battery defects (such as wrinkled poles, folded heads, cracked poles, and overlapping poles) will cause different thicknesses of radiation penetration and different degrees of radiation attenuation. Therefore, the defects of the battery will be displayed in the form of grayscale differences on the battery inspection image.

[0056] However, as the number of cells in a battery increases, the thickness of the cells will also increase. Due to the imaging principle of X-rays and the influence of battery thickness, there will be distorted areas on the battery inspection image. If the battery defects are exactly in these distorted areas, the battery defects may not be detected, which will affect the accuracy of the detection of internal defects of the battery, resulting in a low accuracy rate of the battery defect detection results.

[0057] Based on this, it is necessary to provide a battery testing device, a testing method, a battery production device and a method to address the above technical problems.

[0058] The battery inspection device disclosed in the embodiment of the present application can be applicable to battery cells and finished batteries, and can be but is not limited to being applicable to the inspection process in the production process of the battery. The battery inspection device of the present application performs defect detection on the battery through the inspection images of the two opposite surfaces of the battery, which can improve the accuracy of battery defect detection.

[0059] Figure 1 A schematic diagram of a battery testing device provided in some embodiments of the present application, such as Figure 1 As shown, the battery detection device 100 includes a radiation source 110, a detector 120 and a carrying component 130; the carrying component 130 is arranged between the radiation source 110 and the detector 120, and is used to carry a battery to be tested 150, the radiation emitted by the radiation source 110 is projected to the detector 120 through the battery to be tested 150 placed on the carrying component 130, and the detector 120 is used to obtain a detection image of the battery to be tested 150 based on the received radiation, wherein the detection image includes a first detection image and a second detection image; the radiation source 110 is configured to be located on a side where a first surface of the battery to be tested 150 placed on the carrying component 130 is located to obtain a first detection image of the battery to be tested, and the radiation source 110 is also configured to be located on the other side where a second surface of the battery to be tested 150 placed on the carrying component 130 is located to obtain a second detection image of the battery to be tested 150, the first surface is opposite to the second surface, and the first detection image and the second detection image are used for defect detection of the battery to be tested.

[0060] In some embodiments of the present application, the ray source 110 refers to a device capable of emitting rays. It is understood that the rays emitted by the ray source 110 may be X-rays, α-rays, β-rays, γ-rays, etc., which are not limited in the embodiments of the present application. The embodiments of the present application take the rays emitted by the ray source 110 as X-rays as an example.

[0061] In some embodiments of the present application, the ray detector may be a flat panel detector or a TDI (Tim Delay Integration) detector, wherein the flat panel detector is an array detector that can directly image the irradiated X-rays. The TDI detector is a linear image sensor, which realizes high-speed and high-resolution image acquisition by aligning the pixel rows of the image sensor perpendicular to the movement direction of the object to be detected. The detector 120 can convert the received ray energy into a recordable electrical signal, and by measuring the amount of radiation received by the detector 120, an electrical signal proportional to the amount of radiation is generated, thereby forming a corresponding image. Exemplarily, the detector 120 may include three parts: a ray conversion module, a photoelectric conversion module, and a signal readout and transmission module, wherein the ray conversion module is used to convert the received ray into an optical signal, the photoelectric conversion module is used to convert the optical signal into an electrical signal, and the signal readout and transmission module is used to form a corresponding image based on the electrical signal.

[0062] In some embodiments of the present application, during the process of the battery testing device 100 testing the battery 150 to be tested, the battery 150 to be tested is placed in the radiation radiation area of ​​the radiation source 110, and the radiation emitted by the radiation source 110 is emitted from the radiation irradiation window. The emitted radiation passes through the battery 150 to be tested and then is projected to the detector 120, and the detector 120 receives the radiation passing through the battery 150 to be tested, and images the battery 150 to obtain a detection image of the battery 150 to be tested. The detection image of the battery 150 to be tested obtained by the detector 120 can be a grayscale image, a color image, etc., which is not limited in the embodiments of the present application.

[0063] The embodiment of the present application is described by assuming that the battery 150 to be tested is a square battery, wherein the battery 150 to be tested may also be a cylindrical battery, a special-shaped battery, etc.

[0064] Figure 2 A schematic diagram of an imaging of a battery to be tested provided in some embodiments of the present application, Figure 3 A schematic diagram of a detection image of a battery to be tested provided in some embodiments of the present application. Figure 2 As shown in FIG. 1 , the radiation emitted by the radiation source 110 is projected to the detector 120 through the battery 150 to be tested. It can be seen from the figure that the thickness of the battery 150 to be tested is different in the peripheral area of ​​the battery 150, and the position of the radiation projected to the detector 120 after passing through the battery 150 to be tested is also different, so that the detection image of the battery 150 to be tested obtained by the detector 120 based on the received radiation is distorted, as shown in FIG. Figure 3 As shown, Figure 3 The detection image is obtained by photographing the ray source 110 at the side where the first surface 151 of the battery 150 to be tested is located. Figure 3The image includes a first image 310 formed by the first surface 151 of the battery to be tested 150, and a second image 320 formed by the second surface 152 of the battery to be tested 150. The area between the first image 310 formed by the first surface 151 and the second image 320 formed by the second surface 152 can be a distorted area of ​​the detection image of the battery to be tested 150. The distorted area is affected by the thickness of the battery to be tested 150. The thicker the battery to be tested 150 is, the larger the range of the distorted area is.

[0065] In order to eliminate the influence of the distorted area of ​​the detection image of the battery 150 to be tested on the defect detection result of the battery 150 to be tested, the detection images of the two opposite surfaces of the battery 150 to be tested can be obtained. In the embodiment of the present application, the battery detection device includes a driving mechanism, which drives the bearing component 130 to rotate and / or drives the ray source 110 and the detector 120 to move, so that the ray source 110 is located on the side where the first surface 151 of the battery 150 to be tested placed on the bearing component 130 is located or on the other side where the second surface 152 of the battery 150 to be tested placed on the bearing component 130 is located, so that the detection images of the two opposite surfaces of the battery 150 to be tested can be obtained.

[0066] Figure 4 A schematic diagram of a first detection image provided for some embodiments of the present application, Figure 5 Schematic diagram of a second detection image provided for some embodiments of the present application. The relative position of the radiation source 110 and the battery to be tested 150 can be changed. The radiation source 110 can be located on the side where the first surface 151 of the battery to be tested 150 is located, or on the side where the second surface 152 of the battery to be tested 150 opposite to the first surface is located. When the radiation source 110 is located on the side where the first surface 151 of the battery to be tested 150 is located, a first detection image of the battery to be tested 150 can be obtained, such as Figure 5 As shown in FIG. 3 , the distortion region 330 is included in the figure. When the ray source 110 is also located on the other side where the second surface 152 of the battery 150 to be tested is located, a second detection image of the battery 150 to be tested can be obtained, such as Figure 6 As shown, the figure includes a distorted area 330. The relative position change between the ray source 110 and the battery under test 150 can be achieved by rotating the bearing component 130, moving the ray source 110 and the detector 120, or flipping the battery under test 150.

[0067] In some embodiments of the present application, the supporting component 130 may be fixed, and when the supporting component 130 carries the battery 150 to be tested, the battery 150 to be tested also remains stationary; the supporting component 130 may also be rotatable. In this case, the supporting component 130 may include a receiving groove, and the receiving groove is used to accommodate the battery 150 to be tested, so that when the supporting component 130 rotates, it can drive the battery 150 to be tested to rotate at the same time.

[0068] In some embodiments of the present application, the battery 150 to be tested may be placed on the supporting component 130 in a lying manner (the thickness direction of the battery 150 to be tested placed on the supporting component 130 is perpendicular to the supporting surface of the supporting component 130), and the battery 150 to be tested may also be placed on the supporting component 130 in a vertical manner (the height direction of the battery 150 to be tested placed on the supporting component 130 is perpendicular to the supporting surface of the supporting component 130), and the embodiments of the present invention do not impose specific restrictions on this.

[0069] In an embodiment of the present application, by obtaining a first detection image and a second detection image of the battery 150 to be tested on the side where the first surface 151 and the second surface 152 of the battery 150 to be tested are located, and performing defect detection on the battery 150 to be tested based on the first detection image and the second detection image, the problem of being unable to detect battery defects due to overlap between defects of the battery 150 to be tested and distorted areas in the detection image can be solved, thereby improving the accuracy of the defect detection results of the battery 150 to be tested.

[0070] Figure 6 A schematic diagram of a battery testing device provided in some embodiments of the present application, such as Figure 6 As shown, the battery testing device 100 further includes: a testing unit 140 connected to the detector 120 , and the testing unit 140 is used to perform defect detection on the battery to be tested 150 based on the first detection image and the second detection image.

[0071] In some embodiments of the present application, the detection unit 140 can be a smart terminal such as a PC, a tablet computer, a mobile terminal, etc. for performing defect detection on the battery 150 to be tested, or it can be a server for performing defect detection on the battery 150 to be tested; the server can be a local server or a cloud server, and the embodiments of the present invention do not impose specific restrictions on this.

[0072] The detection unit 140 can be connected to the detector 120 by wire, or the detection unit 140 can be connected to the detector 120 wirelessly. After the detector 120 obtains the first detection image and the second detection image of the battery 150 to be tested, the detector 120 sends the first detection image and the second detection image of the battery 150 to the detection unit 140, and the detection unit 140 can perform defect detection on the battery 150 to be tested based on the first detection image and the second detection image of the battery 150 to be tested. The operation of the detection unit 140 to perform defect detection on the battery 150 to be tested can be performed by a defect detection model or a recognition algorithm, etc., which can be selected according to actual applications and needs. Exemplarily, in order to realize defect detection of the battery 150 to be tested, a pre-trained defect detection model can be stored in the detection unit 140. After the detection unit 140 obtains the first detection image and the second detection image, the first detection image and the second detection image are input into the pre-trained defect detection model, and the defect detection information of the battery 150 to be tested is obtained after being processed by the defect detection model.

[0073] In the embodiment of the present application, the efficiency of defect detection on the battery 150 to be tested can be improved by performing defect detection on the battery 150 to be tested through the detection unit 140.

[0074] According to some embodiments of the present application, the battery detection device includes a first driving mechanism. The first driving mechanism is used to drive the supporting component 130 to rotate so as to switch the relative position of the radiation source 110 and the battery to be tested 150 placed on the supporting component 130, so that the radiation source 110 is located on one side where the first surface of the battery to be tested 150 is located or on the other side where the second surface of the battery to be tested 150 is located.

[0075] In some embodiments of the present application, the first driving mechanism may be any type of mechanism capable of driving the bearing component to rotate, such as a motor.

[0076] In some embodiments of the present application, the battery 150 to be tested can be fixedly placed on the bearing component, and when the first driving mechanism drives the bearing component to rotate, the battery 150 to be tested will rotate with the rotation of the bearing component. Exemplarily, the radiation source 110 is located on the side where the first surface of the battery 150 to be tested is located, and when the first driving mechanism drives the bearing component to rotate, the battery 150 to be tested will rotate with the rotation of the bearing component, and the radiation source 110 can be located on the side where the second surface of the battery 150 to be tested is located. As the first driving mechanism drives the bearing component to continue to rotate, the radiation source 110 can be located again on the side where the first surface of the battery 150 to be tested is located.

[0077] In the embodiment of the present application, by driving the supporting component to rotate through the first driving mechanism, the radiation source 110 can be located on the side where the first surface of the battery 150 to be tested is located to obtain a first detection image of the battery 150 to be tested and can be located on the side where the second surface of the battery 150 to be tested is located to obtain a second detection image of the battery 150 to be tested, thereby simplifying the process of acquiring the detection image of the battery 150 to be tested, thereby improving the efficiency of defect detection of the battery 150 to be tested.

[0078] According to some embodiments of the present application, the battery detection device 100 also includes a second driving mechanism, which is configured to drive the movement of the radiation source 110 and the detector 120 to switch the positional relationship between the radiation source 110 and the detector 120 relative to the supporting component 130, so that the radiation source 110 is located on the side where the first surface of the battery 150 to be tested is located or on the other side where the second surface of the battery 150 to be tested is located.

[0079] In some embodiments of the present application, the second driving mechanism may be any type of mechanism capable of driving the ray source 110 and the detector 120 to move, for example, a motor. The second driving mechanism may drive the ray source 110 and the detector 120 to move simultaneously, or the second driving mechanism may drive the ray source 110 or the detector 120 to move separately. For example, the second driving mechanism may first drive the ray source 110 to move, and then drive the detector 120 to move after the ray source 110 moves to the corresponding position, or the second driving mechanism may first drive the detector 120 to move, and then drive the ray source 110 to move after the detector 120 moves to the corresponding position.

[0080] In some embodiments of the present application, the position of the supporting component 130 remains unchanged, that is, the position of the battery to be tested 150 remains unchanged. The second driving mechanism drives the ray source 110 and the detector 120 to move, when the ray source 110 is located on the side where the first surface of the battery to be tested 150 is located, the detector 120 is located on the side where the second surface of the battery to be tested 150 is located; similarly, when the detector 120 is located on the side where the first surface of the battery to be tested 150 is located, the ray source 110 is located on the side where the second surface of the battery to be tested 150 is located.

[0081] In the embodiment of the present application, the second driving mechanism drives the radiation source 110 and the detector 120 to move, making the battery detection device 100 more flexible and the method of acquiring the detection image of the battery 150 to be tested more diversified, thereby improving the efficiency of defect detection of the battery 150 to be tested.

[0082] According to some embodiments of the present application, the battery testing device 100 also includes a mechanical gripper, which is configured to flip the battery to be tested 150 placed on the supporting component 130 so that the radiation source 110 is located on the side where the first surface 151 of the battery to be tested 150 is located or on the other side where the second surface 152 of the battery to be tested 150 is located.

[0083] In some embodiments of the present application, the mechanical gripper is used to grab the battery to be tested 150 and flip the battery to be tested 150. The material and shape of the mechanical gripper are not specifically limited in the embodiments of the present application.

[0084] In some embodiments of the present application, the positions of the radiation source 110, the detector 120 and the supporting component 130 can remain unchanged. The battery 150 to be tested can be placed on the supporting component 130, and the state of the battery 150 to be tested can be movable. The mechanical gripper can flip the battery 150 to be tested placed on the supporting component 130, so that the radiation source 110 is located on the side where the first surface 151 of the battery 150 to be tested is located or on the other side where the second surface 152 of the battery 150 to be tested is located.

[0085] In the embodiment of the present application, the battery 150 to be tested placed on the supporting component 130 is flipped by a mechanical gripper, so that the radiation source 110 can be located on the side where the first surface of the battery 150 to be tested is located to obtain a first detection image of the battery 150 to be tested and located on the side where the second surface of the battery 150 to be tested is located to obtain a second detection image of the battery 150 to be tested. Since only the battery 150 to be tested needs to be flipped, it is easy to implement and the flipping efficiency is high, thereby improving the efficiency of defect detection of the battery 150 to be tested.

[0086] According to some embodiments of the present application, the carrying component 130 includes a carrying surface for carrying the battery to be tested 150 , and the height direction of the battery to be tested 150 placed on the carrying component 130 is perpendicular to the carrying surface.

[0087] In some embodiments of the present application, the carrying surface included in the carrying component 130 for carrying the battery to be tested 150 may be a horizontal plane, the battery to be tested 150 may be placed on the carrying surface of the carrying component 130, and the height direction of the battery to be tested 150 may be perpendicular to the carrying surface, that is, the battery to be tested 150 may be placed vertically on the carrying surface.

[0088] In the embodiment of the present application, by making the height direction of the battery to be tested 150 placed on the carrying component 130 perpendicular to the carrying surface, the robot gripper can more easily grasp the battery to be tested 150 .

[0089] Figure 6 A schematic diagram of the structure of a circular guide rail provided in some embodiments of the present application, such as Figure 6As shown, the battery testing device 100 includes a plurality of supporting components 130 , and the battery testing device 100 also includes an annular guide rail 160 . The plurality of supporting components 130 are configured to be able to move in sequence along the annular guide rail 160 to between the radiation source 110 and the detector 120 .

[0090] In some embodiments of the present application, a plurality of supporting components 130 may be arranged at equal intervals on a circular guide rail 160 , and the plurality of supporting components 130 may be moved along the circular guide rail 160 , and moved in turn to between the radiation source 110 and the detector 120 , thereby driving the battery 150 to be tested to move between the radiation source 110 and the detector 120 .

[0091] In some embodiments of the present application, the bearing component 130 may be fixedly disposed on the annular guide rail 160 , or may be movably disposed on the annular guide rail 160 .

[0092] In the embodiment of the present application, by configuring the plurality of supporting components 130 to be able to move in sequence along the annular guide rail 160 to between the radiation source 110 and the detector 120 , the efficiency of the battery testing device 100 in performing defect detection on the battery 150 to be tested can be improved.

[0093] According to some embodiments of the present application, the focal point diameter D of the ray source 110 satisfies: 0.5 mm ≤ D ≤ 0.9 mm.

[0094] In some embodiments of the present application, in general, the focal size of the radiation source 110 is divided into a large focus, a small focus and a micro focus. The smaller the focal size of the radiation source 110, the higher the resolution of the image and the clearer the image. In an embodiment of the present application, when performing defect detection on the battery 150 to be tested, it is only necessary to determine whether there is a defect in the detection image of the battery 150 to be tested, without determining the specific size of the defect. Therefore, the partial resolution of the image can be reduced to improve the imaging brightness and shorten the shooting time, that is, a radiation source 110 with a small focus can be selected. Exemplarily, a 150kv small focus radiation source 110 can be used, and at the same time, the composite material can be shielded at the mouth of the radiation tube to shield low-energy soft rays, reduce the impact caused by soft rays, and improve the contrast-to-noise ratio.

[0095] In the embodiment of the present application, a ray source 110 with a focal diameter of 0.5 mm ≤ D ≤ 0.9 mm is used, which can not only meet the requirements for detection image resolution, but also shorten the shooting time, and is more suitable for use in production lines.

[0096] According to some embodiments of the present application, an edge of a projection area of ​​the radiation emitted by the radiation source 110 on the plane where the detector 120 is located is located inside an edge of the radiation detector 120 .

[0097] In some embodiments of the present application, the detector 120 can be an amorphous silicon flat panel detector, the pixel size of the detector is 139um, and the thickness of the detector scintillator layer can be increased from the original 500um to 700um. This detector has the advantages of high conversion efficiency and wide dynamic range.

[0098] In some embodiments of the present application, by selecting a larger detector 120, for example, replacing a detector with a size of 210mm×210mm with a detector with a size of 250mm×300mm, the magnification of the battery to be tested 150 in the detection image can be increased, making it easier for the detection unit 140 to detect defects in the battery to be tested 150 through the detection image, while also reducing the number of times the detection image is taken.

[0099] Figure 7 A schematic diagram of the structure of another battery testing device 100 provided in some embodiments of the present application is shown in FIG. Figure 7 As shown, the battery testing device 100 further includes a testing platform 170 , and the ray source 110 and the carrying component 130 are disposed on the testing platform 170 .

[0100] In some embodiments of the present application, the detection platform 170 may be a mechanical platform specially set up for the battery detection process. By arranging the radiation source 110 and the bearing component 130 on the detection platform 170, the structure of the battery detection device 100 can be made more stable.

[0101] The second aspect of the present application provides a battery detection method. Fig. 9 A flowchart of a battery detection method provided for some embodiments of the present application, such as Fig. 9 As shown, the detection method includes:

[0102] Step S910: acquiring a detection image including the battery to be tested obtained by taking pictures under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image obtained when the radiation source is located on a side where a first surface of the battery to be tested is located, and the second detection image is an image obtained when the radiation source is located on the other side where a second surface of the battery to be tested is located, and the first surface is opposite to the second surface;

[0103] Step S920: performing defect detection on the battery to be tested based on the first detection image and the second detection image to obtain defect information of the battery to be tested.

[0104] In some embodiments of the present application, the operation of defect detection on the battery to be tested can be performed by means of a defect detection model or a recognition algorithm, and can be selected according to the actual application and needs. Exemplarily, in order to realize defect detection of the battery to be tested, the defect detection model can be pre-trained to obtain a pre-trained defect detection model. After acquiring the first detection image and the second detection image, the first detection image and the second detection image are input into the pre-trained defect detection model, and the defect detection information of the battery to be tested is obtained after being processed by the defect detection model.

[0105] In an embodiment of the present application, by acquiring a first detection image and a second detection image of the battery to be tested on a side where the first surface of the battery to be tested is located and a side where the second surface of the battery to be tested is located, and performing defect detection on the battery to be tested based on the first detection image and the second detection image, the problem of being unable to detect battery defects due to overlap between defects of the battery to be tested and distorted areas in the detection image can be solved, thereby improving the accuracy of the defect detection results of the battery to be tested.

[0106] According to some embodiments of the present application, step S920 includes: simultaneously inputting the first detection image and the second detection into a defect detection model to obtain defect information of the battery to be tested output by the defect detection model.

[0107] In an embodiment of the present application, the defect detection model may be a convolutional neural network (CNN), a recurrent neural network (RNN), or other deep learning networks, machine learning networks, etc.

[0108] In an embodiment of the present application, the defect information of the battery to be tested may include electrode folding, electrode wrinkling, electrode dark marks, excessive electrode gap, normal image, etc. The defect information of the battery to be tested may also include the number of defects.

[0109] The detection unit has a built-in defect detection model, which can be a model sent to the detection unit after being trained by other computer devices based on multiple detection image samples, or a model obtained by the detection unit after being trained based on multiple detection image samples.

[0110] It should be noted that a defect detection model can realize the detection of one or more defect types.

[0111] In the embodiment of the present application, the efficiency of defect detection of the battery to be tested can be improved by simultaneously inputting the first detection image and the second detection into the defect detection model to obtain the defect information of the battery to be tested output by the defect detection model.

[0112] Fig.10A flowchart of a defect detection model training process provided for some embodiments of the present application, such as Fig.10 As shown in Figure 1, the training process of the defect detection model includes:

[0113] Step S1010: Acquire a sample detection image including a sample battery obtained by photographing under the irradiation of a radiation source, wherein the sample detection image includes a first sample detection image and a second sample detection image, the first sample detection image is an image acquired when the radiation source is located on one side of the first surface of the sample battery, and the second sample detection image is an image acquired when the radiation source is located on the other side of the second surface of the sample battery.

[0114] Step S1020: marking the real defect information in the first sample detection image and the second sample detection image.

[0115] Step S1030: inputting the first sample detection image and the second sample detection image into the defect detection model at the same time to obtain the predicted defect information of the sample battery output by the defect detection model.

[0116] Step S1040: Calculate the loss value based on the actual defect information and the predicted defect information.

[0117] Step S1050: Adjusting the parameters of the defect detection model based on the loss value.

[0118] In some embodiments of the present application, after the loss value is calculated based on the real defect information and the predicted defect information, the defect detection model is trained according to the loss value, and the relevant parameters in the defect detection model are adjusted so that the defect detection model learns the difference between the predicted defect information and the real defect information according to the loss value during the iteration process, and the real defect information is more clearly defined, so that the defect detection model can output defect information that is the same as the real defect information when performing defect detection on the battery to be tested, and the detected defect information is more accurate.

[0119] According to some embodiments of the present application, the defect information includes defect type and defect quantity.

[0120] In some embodiments of the present application, defect information includes defect types and defect quantities. Specifically, defect types may include electrode wrinkling, head folding, electrode cracking, and electrode overlap, etc. The defect quantity may be the total number of defects detected in the battery to be tested, or the number corresponding to each defect, or the total number of defects and the number corresponding to each defect. The defect information may also include defect location information, and the defect location information includes the horizontal and vertical coordinates of the defect on the image.

[0121] In the embodiment of the present application, the defect information includes the defect type and defect quantity, which can make the defect detection result clearer.

[0122] Some embodiments of the third aspect of the present application provide a battery detection device, Fig.11 A block diagram of a battery detection device provided in some embodiments of the present application. Fig.11 As shown, the battery detection device includes: an image acquisition module 1101, which is configured to acquire a detection image including a battery to be tested obtained by shooting under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image acquired when the radiation source is located on the side where the first surface 151 of the battery to be tested 150 is located, and the second detection image is an image acquired when the radiation source is located on the other side where the second surface 152 of the battery to be tested 150 is located, and the first surface 151 is opposite to the second surface 152;

[0123] The defect detection module 1102 is configured to perform defect detection on the battery to be tested 150 based on the first detection image and the second detection image to obtain defect information of the battery to be tested 150 .

[0124] In some embodiments, the defect detection module 1102 includes: a defect detection submodule configured to simultaneously input the first detection image and the second detection image into a defect detection model to obtain defect information of the battery 150 to be tested output by the defect detection model.

[0125] In some embodiments, the defect detection submodule includes: a sample detection image acquisition module, configured to acquire a sample detection image including a sample battery obtained by taking pictures under the irradiation of a radiation source, wherein the sample detection image includes a first sample detection image and a second sample detection image, the first sample detection image is an image acquired when the radiation source is located on the side where the first surface of the sample battery is located, and the second sample detection image is an image acquired when the radiation source is located on the other side where the second surface of the sample battery is located; a marking module, configured to mark the real defect information in the first sample detection image and the second sample detection image; an input module, configured to input the first sample detection image and the second sample detection image into a defect detection model at the same time to obtain the predicted defect information of the sample battery output by the defect detection model; a calculation module, configured to calculate a loss value based on the real defect information and the predicted defect information; and an adjustment module, configured to adjust the parameters of the defect detection model based on the loss value.

[0126] In some embodiments, the defect information includes defect type and defect quantity.

[0127] The fourth aspect of the present application provides a method for producing a battery. Fig.12 A flowchart of a battery production method provided for some embodiments of the present application, such as Fig.12As shown, the production method includes: Step S1201: using the battery detection method in the above embodiment to perform defect detection on the battery 150 to be tested.

[0128] In the embodiment of the present application, the battery detection method in the above embodiment is used to perform defect detection on the battery 150 to be tested, which can improve the efficiency of defect detection and the accuracy of defect detection results.

[0129] According to some embodiments of the present application, the battery production method further includes: Step S1202: in response to the detection result of the battery to be tested 150 indicating that the battery to be tested is defective, the defective battery is discarded.

[0130] In the embodiment of the present application, in response to the test result of the battery 150 indicating that the battery 150 is defective, the defective battery 150 can be transferred to the waste outlet, and in response to the test result of the battery 150 indicating that the battery 150 is not defective, the non-defective battery 150 can be further tested. The battery production method is suitable for large-scale batch production testing, and can prevent defective batteries from entering the market to a certain extent.

[0131] The battery detection method in the application is further described below in conjunction with a specific embodiment. The embodiment of the application takes an X-ray source and a flat panel detector as an example. Fig.13 A flowchart of another battery production method provided for some embodiments of the present application, such as Fig.13 As shown, the production method comprises:

[0132] Step S1301: the flat panel detector performs bright and dark field calibration: the detector 120 in the battery testing device 100 is calibrated to eliminate residual images and bad points in the detector 120 to ensure that the acquired detection image of the battery 150 to be tested is authentic and valid.

[0133] Step S1302: Calibration of the measurement system: Calibrate the radiation source 110, the detector 120, the carrier 130 and the detection unit 140 in the battery detection device 100 together to ensure that the magnification of the detection image of the battery to be tested 150 remains unchanged.

[0134] Step S1303 : Automatic loading by a robot: placing the battery 150 to be tested on the supporting component 130 .

[0135] Step S1304: The X-ray source automatically detects and saves images: the rays emitted by the ray source 110 are projected to the detector 120 through the battery to be tested 150 placed on the supporting component 130, and the detector 120 is used to obtain a detection image of the battery to be tested 150 based on the received rays, wherein the detection image includes a first detection image and a second detection image; the ray source 110 is configured to be located on a side where the first surface of the battery to be tested 150 placed on the supporting component 130 is located to obtain a first detection image of the battery to be tested, and the ray source 110 is also configured to be located on the other side where the second surface of the battery to be tested 150 placed on the supporting component 130 is located to obtain a second detection image of the battery to be tested 150, the first surface being opposite to the second surface.

[0136] Step S1305: Algorithm judgment: The detection unit 140 performs defect detection on the battery 150 to be tested based on the first detection image and the second detection image. The first detection image and the second detection image can be simultaneously input into the defect detection model to obtain defect information of the battery 150 to be tested output by the defect detection model.

[0137] Step S1306: OK products are pulled in and NG products are discharged: in response to the inspection result of the battery 150 to be tested indicating that the battery 150 to be tested is defective, the defective battery is discarded.

[0138] Some embodiments of the present application provide an electronic device, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery detection method in the above-mentioned embodiment or the battery production method in the above-mentioned embodiment.

[0139] Various embodiments of the systems and techniques described above in this application 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 chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0140] An embodiment of the present application provides a battery production device, including the electronic device in the above embodiment.

[0141] An embodiment of the present application provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the battery detection method in the above embodiment or the battery production method in the above embodiment is implemented.

[0142] Computer readable media can be tangible media that can contain or store programs for use by or in conjunction with instruction execution systems, devices or equipment. Machine readable media can be machine readable signal media or machine readable storage media. Machine readable media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the above. More specific examples of machine readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0143] An embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the battery detection method in the above embodiment or the battery production method in the above embodiment.

[0144] The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, part or all of the above method can be implemented in whole or in part according to the process or function of the embodiment of the present application.

[0145] The technical solution of the present application is further described below by means of a specific embodiment. Figures 1 to 7As shown, the battery detection device 100 includes a radiation source 110, a detector 120, a bearing component 130 disposed between the radiation source 110 and the detector 120, and a detection unit 140. The focal diameter D of the radiation source 110 satisfies: 0.5mm≤D≤0.9mm. The edge of the projection area of ​​the radiation emitted by the radiation source 110 on the plane where the detector 120 is located is located inside the edge of the detector 120. The carrying component 130 is used to carry the battery 150 to be tested. The rays emitted by the ray source 110 are projected to the detector 120 through the battery 150 to be tested placed on the carrying component 130, and the detector 120 is used to obtain a detection image of the battery 150 to be tested based on the received rays, wherein the detection image includes a first detection image and a second detection image. The ray source 110 is configured to be located on a side where a first surface of the battery 150 to be tested placed on the carrying component 130 is located to obtain a first detection image of the battery 150 to be tested. The ray source 110 is also configured to be located on the other side where a second surface of the battery 150 to be tested placed on the carrying component 130 is located to obtain a second detection image of the battery 150 to be tested, the first surface being opposite to the second surface. The detection unit 140 is connected to the detector 120, and the detection unit 140 is used to perform defect detection on the battery 150 to be tested based on the first detection image and the second detection image.

[0146] The battery testing device 100 includes a first driving mechanism, which is used to drive the bearing component 130 to rotate, so as to switch the relative position of the radiation source 110 and the battery to be tested 150 placed on the bearing component 130, so that the radiation source 110 is located on the side where the first surface of the battery to be tested 150 is located or on the other side where the second surface of the battery to be tested 150 is located. The bearing component 130 includes a bearing surface for bearing the battery to be tested 150, and the height direction of the battery to be tested 150 placed on the bearing component 130 is perpendicular to the bearing surface.

[0147] The battery testing device 100 includes a plurality of supporting components 130 . The battery testing device 100 also includes an annular guide rail 160 . The plurality of supporting components 130 are configured to be able to move in sequence along the annular guide rail 160 to between the radiation source 110 and the detector 120 .

[0148] The battery detection device 100 also includes a second driving mechanism, which is configured to drive the movement of the radiation source 110 and the detector 120 to switch the positional relationship between the radiation source 110 and the detector 120 relative to the supporting component 130, so that the radiation source 110 is located on the side where the first surface of the battery 150 to be tested is located or on the other side where the second surface of the battery 150 to be tested is located.

[0149] The battery testing device 100 further includes a mechanical gripper configured to flip the battery 150 to be tested placed on the supporting component 130 so that the radiation source 110 is located on one side where the first surface of the battery 150 to be tested is located or on the other side where the second surface of the battery 150 to be tested is located.

[0150] The battery testing device 100 further includes a testing platform 170 , on which the radiation source 110 and the supporting component 130 are disposed.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery testing device, characterized in that: include: Radiation source; detector; A bearing component is provided between the ray source and the detector, and is used to bear the battery to be tested. The ray emitted by the ray source is projected to the detector through the battery to be tested placed on the bearing component, and the detector is used to obtain a detection image of the battery to be tested based on the received ray. Wherein, the detection image includes a first detection image and a second detection image, the radiation source is configured to be located on a side where the first surface of the battery to be tested is placed on the supporting component to obtain a first detection image of the battery to be tested, and the radiation source is also configured to be located on the other side where the second surface of the battery to be tested is placed on the supporting component to obtain a second detection image of the battery to be tested, the first surface is opposite to the second surface, and the first detection image and the second detection image are used to perform defect detection on the battery to be tested.

2. The battery testing device according to claim 1, characterized in that: Also includes: A detection unit is connected to the detector, and is used to perform defect detection on the battery to be tested based on the first detection image and the second detection image.

3. The battery testing device according to claim 1, characterized in that: The battery testing device also includes a first driving mechanism, which is used to drive the supporting component to rotate so as to switch the relative position of the radiation source and the battery to be tested placed on the supporting component, so that the radiation source is located on one side where the first surface of the battery to be tested is located or on the other side where the second surface of the battery to be tested is located.

4. The battery testing device according to claim 1, characterized in that: The battery detection device also includes a second driving mechanism, which is configured to drive the radiation source and the detector to move so as to switch the positional relationship between the radiation source and the detector relative to the supporting component, so that the radiation source is located on one side of the first surface of the battery to be tested or on the other side of the second surface of the battery to be tested.

5. The battery testing device according to claim 1, characterized in that: The battery testing device further includes a mechanical gripper configured to flip the battery to be tested placed on the supporting component so that the radiation source is located on one side where the first surface of the battery to be tested is located or on the other side where the second surface of the battery to be tested is located.

6. The battery testing device according to claim 5, characterized in that: The carrying component comprises a carrying surface for carrying the battery to be tested, and the height direction of the battery to be tested placed on the carrying component is perpendicular to the carrying surface.

7. The battery testing device according to any one of claims 1 to 6, characterized in that: The battery testing device comprises a plurality of the bearing components, and the battery testing device further comprises an annular guide rail, wherein the plurality of bearing components are configured to be able to move in sequence along the annular guide rail to between the radiation source and the detector.

8. The battery testing device according to any one of claims 1 to 7, characterized in that: The focal point diameter D of the ray source satisfies: 0.5 mm ≤ D ≤ 0.9 mm.

9. The battery testing device according to any one of claims 1 to 8, characterized in that: The edge of the projection area of ​​the ray emitted by the ray source on the plane where the detector is located is located inside the edge of the detector.

10. The battery testing device according to any one of claims 1 to 9, characterized in that: The battery testing device also includes: A detection platform, on which the ray source and the bearing component are arranged.

11. A battery detection method, characterized in that: The method comprises: Acquire a detection image including the battery to be tested that is obtained by photographing under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image obtained when the radiation source is located on a side where a first surface of the battery to be tested is located, and the second detection image is an image obtained when the radiation source is located on the other side where a second surface of the battery to be tested is located, and the first surface is opposite to the second surface; Defect detection is performed on the battery to be tested based on the first detection image and the second detection image to obtain defect information of the battery to be tested.

12. The battery detection method according to claim 11, characterized in that: The performing defect detection on the battery to be tested based on the first detection image and the second detection image comprises: The first detection image and the second detection are simultaneously input into a defect detection model to obtain defect information of the battery to be tested output by the defect detection model.

13. The battery detection method according to claim 12, characterized in that: The training process of the defect detection model includes: Acquire a sample detection image including a sample battery obtained by photographing under the irradiation of the radiation source, wherein the sample detection image includes a first sample detection image and a second sample detection image, the first sample detection image is an image obtained when the radiation source is located on the side where the first surface of the sample battery is located, and the second sample detection image is an image obtained when the radiation source is located on the other side where the second surface of the sample battery is located; Marking real defect information in the first sample detection image and the second sample detection image; Inputting the first sample detection image and the second sample detection image into the defect detection model at the same time to obtain the predicted defect information of the sample battery output by the defect detection model; Calculating a loss value based on the actual defect information and the predicted defect information; and Parameters of the defect detection model are adjusted based on the loss value.

14. The battery detection method according to any one of claims 11 to 13, characterized in that: The defect information includes defect type and defect quantity.

15. A battery detection device, characterized in that: The device comprises: an image acquisition module, configured to acquire a detection image including the battery to be tested obtained by shooting under the irradiation of a radiation source, wherein the detection image includes a first detection image and a second detection image, the first detection image is an image acquired when the radiation source is located on one side where the first surface of the battery to be tested is located, and the second detection image is an image acquired when the radiation source is located on the other side where the second surface of the battery to be tested is located, and the first surface is opposite to the second surface; The defect detection module is configured to perform defect detection on the battery to be tested based on the first detection image and the second detection image to obtain defect information of the battery to be tested.

16. A method for producing a battery, characterized in that: The method comprises: The method according to any one of claims 11 to 14 is used to perform defect detection on a battery to be tested.

17. The method according to claim 16, characterized in that The method further comprises: In response to the detection result of the battery to be tested indicating that the battery to be tested is defective, the defective battery is discarded.

18. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively coupled to the at least one processor; in The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the battery detection method according to any one of claims 11 to 14 or the battery production method according to claim 16 or 17.

19. A battery production device, characterized in that: Comprising the electronic device as claimed in claim 18.

20. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the battery detection method according to any one of claims 11 to 14 or the battery production method according to claim 16 or 17 is implemented.

21. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the battery detection method according to any one of claims 11 to 14 or the battery production method according to claim 16 or 17.

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