Battery detection device, method, manufacturing method, equipment, and medium

Abstract

The present application provides a detection device, method, apparatus, and medium for detecting batteries. The detection device includes a first radiation source (10), a first detector (11), a second radiation source (20), a second detector (21), a transport platform (100), and a detection unit (200). The transport platform (100) is for placing a test battery (300) on it and is movable, with a movement path passing between the first radiation source (10) and the first detector (11) and between the second radiation source (20) and the second detector (21). The detection unit (200) is connected to each of the first detector (11) and the second detector (21). The detection unit (200) is for detecting defects in the test battery (300) based on radiation received by the first detector (11) and radiation received by the second detector (20).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application references a Chinese patent application, filed on June 30, 2023, with application number 202310797532.1, entitled "Battery detection device, method, manufacturing method, equipment and medium," the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] The present application relates to the field of battery technology, and more particularly to a battery detection device, method, manufacturing method, equipment, and medium. [Background technology]

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles have become an important component in this field due to their energy-saving and environmentally friendly advantages. Battery technology is a key element in the development of electric vehicles.

[0004] Batteries can develop defects during manufacturing and use, and stacked batteries are particularly susceptible to defects as their corners are more susceptible to impact. Some defects cannot be seen from the outside, so detection from inside the battery is necessary.

[0005] In the prior art, when detecting a battery, the image of the corners of the battery is easily distorted, which can result in erroneous judgment, oversight, and insufficient detection of defects in the battery. Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems present in the background art, and therefore, one of the objectives of the present application is to provide a battery detection device, method, manufacturing method, equipment, and medium that improves the problems of erroneous judgment, oversight, and insufficient detection in defect detection that are present in the prior art.

[0007] An example of a first aspect of the present application provides a detection device for detecting batteries, wherein the test battery is a stacked battery, the detection device including: a first radiation source; a second radiation source; a first detector facing the emission port of the first radiation source; a second detector facing the emission port of the second radiation source; a transport platform on which the test battery is placed, the transport platform being movable and having a movement trajectory configured to pass between the first radiation source and the first detector, and between the second radiation source and the second detector; and a detection unit connected to each of the first detector and the second detector, and configured to detect defects in the test battery based on radiation received by the first detector and radiation received by the second detector.

[0008] In the technical solution of the embodiment of the present application, the first radiation source and the first detector cooperate to detect the first corner of the test battery, and the second radiation source and the second detector cooperate to detect the second corner of the test battery. This allows the angle between the radiation and the plane on which the first and second corners of the test battery are located to be as close to 90° as possible when detecting defects in the test battery, thereby reducing distortion in the first corner detection image and the second corner detection image. As a result, the first corner detection image is closer to the actual state of the first corner 1 of the test battery, and the second corner detection image is closer to the actual state of the second corner 2 of the test battery. The detection unit uses the first corner detection image and the second corner detection image to detect defects in the corners of the test battery, thereby more fully detecting defects inside the test battery and reducing erroneous detection, oversight, and insufficient defect detection.

[0009] In some embodiments, the size D1 of the radiation source focus of the first radiation source and the size D2 of the radiation source focus of the second radiation source satisfy D1≦10 μm and / or D2≦10 μm. The smaller the radiation source focus, the smaller the geometric unsharpness of the radiation transmitted through the object, and the higher the resolution. In some embodiments of the present application, limiting the size of the radiation source focus of at least one of the first radiation source and the second radiation source to 10 μm or less improves the imaging quality of at least one corner and reduces the effect of distortion on the detection of defects in the test cell.

[0010] In some embodiments, the detection device further includes a third radiation source and a third detector facing the outlet of the third radiation source, the movement trajectory of the transport platform further passes between the third radiation source and the third detector, and the detection unit is further configured to detect defects of the battery under test based on the radiation received by the third detector. By cooperating the third radiation source and the third detector to detect defects on the first surface of the battery under test, the detection of the entire battery under test becomes possible, and the defects of the battery under test can be detected more thoroughly.

[0011] In some embodiments, the size D3 of the radiation source focus of the third radiation source satisfies 10 μm < D3 ≤ 30 μm. Since the distortion in the central part of the battery under test is small, an extremely small radiation source focus for imaging is not required. When the size of the radiation source focus of the third radiation source is 10 μm or less, although the imaging quality is good, the detection time is long and the efficiency is reduced. When the size of the radiation source focus of the third radiation source is greater than 30 μm, the imaging quality deteriorates and the detection accuracy decreases. By setting the size D3 of the radiation source focus of the third radiation source to 10 μm < D3 ≤ 30 μm, the imaging quality can be improved, the detection time can be shortened, and the working efficiency can be increased.

[0012] In some embodiments, the area of the irradiation surface of the third radiation source on the first surface of the battery under test is at least half of the area of the first surface, and the first surface is the surface of the battery under test facing the outlet of the third radiation source. By the area of the irradiation surface of the third radiation source on the first surface being at least half of the area of the first surface, the first surface can be detected in two detections, and the first surface can be detected more thoroughly by the detections on both sides.

[0013] In some embodiments, the first radiation source, the second radiation source, and the third radiation source are all located on the same side of the transport platform, which facilitates the layout of the radiation source and the detector.

[0014] In some embodiments, at least one of the first radiation source, the second radiation source, and the third radiation source is an integrated radiation source, which can improve the reliability of the detection device because an integrated radiation source has a low rework rate, high stability, a small volume, and easy later maintenance.

[0015] A second embodiment of the present application provides a battery detection method, which includes detecting a test battery using the detection device described in any one of the above embodiments, the test battery including a first corner and a second corner. The detection method includes acquiring a detection image of the test battery, the detection image including a first corner detection image and a second corner detection image, identifying defect information for the test battery based on the detection image, and identifying a quality detection result for the test battery based on the defect information for the test battery. By acquiring the first corner detection image and the second corner detection image of the test battery and analyzing the first corner detection image and the second corner detection image to identify the defect information for the test battery, distortions contained in the first corner detection image and the second corner detection image are reduced, so that the first corner detection image and the second corner detection image are closer to the actual state of the first corner of the test battery, and the second corner detection image are closer to the actual state of the second corner of the test battery, respectively. This allows for more accurate detection of defects within the test battery and reduces problems such as erroneous detection, oversight, and insufficient defect detection.

[0016] In some embodiments, obtaining a detection image of the test battery includes controlling the first corner to be located between a first radiation source and a first detector and the second corner to be located between a second radiation source and a second detector; controlling radiation emitted from the first radiation source to pass through the first corner of the test battery and project it onto the first detector; controlling radiation emitted from the second radiation source to pass through the second corner of the test battery and project it onto the second detector; determining a first corner detection image based on the radiation received by the first detector; determining a second corner detection image based on the radiation received by the second detector; and determining a detection image of the test battery based on the first corner detection image and the second corner detection image. By controlling the positioning of the first corner between the first radiation source and the first detector and the second corner between the second radiation source and the second detector, the angle between the radiation and the plane on which the first and second corners of the test battery are located can be as close to 90° as possible when detecting defects in the test battery, thereby reducing distortion in the first corner detection image and the second corner detection image. As a result, the first corner detection image more closely resembles the actual state of the first corner of the test battery, and the second corner detection image more closely resembles the actual state of the second corner of the test battery. Using the first corner detection image and the second corner detection image to detect defects in the corners of the test battery allows for more thorough detection of defects within the test battery, reducing erroneous detection, oversights, and insufficient defect detection.

[0017] In some embodiments, determining the first corner detection image based on the radiation received by the first detector includes collecting a plurality of first raw images including the first corner based on the radiation received by the first detector, and processing the plurality of first raw images to obtain the first corner detection image.

[0018] In some embodiments, processing the plurality of first raw images to obtain a first corner-detection image includes filtering the plurality of first raw images to obtain a first filtered image; applying noise reduction to the first filtered image to obtain a first noise-reduced image; and extracting a first detection region from the first noise-reduced image to obtain a first corner-detection image, where the first detection region is a region in the first noise-reduced image that includes the first corner. By collecting and processing the plurality of first raw images, even if one first raw image contains an error, the other first raw images remain accurate, thereby reducing the impact of the error on the detection result. In some embodiments, filtering can remove irrelevant information from the plurality of first raw images and improve the signal-to-noise ratio of the first raw images. Performing noise reduction on the first filtered images to obtain the first noise-reduced image can remove random noise, such as quantum noise, alias noise, and electronic noise, from the first filtered image, thereby significantly improving the signal-to-noise ratio of the first filtered image. The first raw image collected by the first radiation source and the first detector includes not only the first corner but also other regions. In the embodiment of the present application, by cutting out the region including the first corner, it is possible to reduce the amount of subsequent calculations and also reduce the influence of errors in other regions on the detection of defects in the first corner.

[0019] In some embodiments, the first corner is adjacent to the second corner, and the test battery further includes adjacent third and fourth corners, the third corner being adjacent to the first corner and the fourth corner being adjacent to the second corner, and acquiring the detected image of the test battery includes controlling movement of the test battery so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector, and projecting radiation emitted from the first radiation source through the third corner of the test battery onto the first detector. The method includes controlling the first radiation source so that the radiation emitted from the second radiation source passes through the fourth corner of the test battery and is projected onto the second detector, determining a third-corner detection image of the third corner based on the radiation received by the first detector, determining a fourth-corner detection image of the fourth corner based on the radiation received by the second detector, and determining defect information of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, and the fourth corner detection image. Because the above steps enable detection of the third and fourth corners of the test battery, the test battery can be more fully detected, and the third-corner detection image and the fourth-corner detection image approach the actual state of the third corner and the fourth corner, respectively. This reduces problems of erroneous detection, oversight, and insufficient defect detection.

[0020] In some embodiments, the test battery is placed on a carrier, the third corner and the first corner are arranged along a first direction, and the fourth corner and the second corner are arranged along the first direction, and controlling the movement of the test battery so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector includes controlling the movement of the carrier along the first direction so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector. Controlling the movement of the carrier is easier than controlling the movement of the test battery, and the test battery is more stable because it does not require changing the relative positions of the test battery and the carrier.

[0021] In some embodiments, the test battery further includes a first surface, the first surface being perpendicular to a thickness direction of the test battery, and the first corner and the second corner both being located on the first surface. Acquiring a detection image of the test battery includes: controlling the first surface to be located between a third radiation source and a third detector; controlling radiation emitted from the third radiation source to pass through the first surface of the test battery and project it onto the third detector; identifying the first surface detection image of the first surface based on the radiation received by the third detector; and identifying the detection image of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, the fourth corner detection image, and the first surface detection image. By detecting the first surface further included in the test battery through the above steps, the test battery can be more fully detected.

[0022] In some embodiments, the first surface includes a first region and a second region connected to each other, and controlling the radiation emitted from the third radiation source to pass through the first surface of the test battery and project onto the third detector includes controlling the radiation emitted from the third radiation source to pass through at least the first region and project onto the third detector, and controlling the radiation emitted from the third radiation source to pass through at least the second region and project onto the third detector. By detecting the first surface twice, missed detections of the first surface can be reduced, thereby more adequately detecting defects in the test battery.

[0023] In some embodiments, determining defect information of the test battery based on the detection image includes determining a number of defects and / or a size of the defects of the test battery based on the detection image, and determining defect information of the test battery based on the number of defects and / or the size of the defects. The number of defects and the size of the defects are both indicators for evaluating defects in the test battery, where the number of defects is the sum of the number of all defects in the test battery and the size of the defects is the individual size of each defect.

[0024] In some embodiments, determining a quality detection result for the test battery based on the defect information for the test battery includes determining that the test battery is unqualified if the number of defects exceeds a predetermined number, which indicates that the test battery has many defects and therefore determines that the test battery is unqualified.

[0025] In some embodiments, determining a quality detection result for the test battery based on the defect information for the test battery includes determining that the test battery is unqualified if the defect size exceeds a predetermined size, where the defect size exceeding the predetermined size indicates that the defect size of the test battery is large, and therefore the test battery is determined to be unqualified.

[0026] An embodiment of a third aspect of the present application provides a battery detection device, wherein a test battery includes a first corner and a second corner, the first corner being adjacent to the second corner, and the battery detection device includes: an acquisition module configured to acquire a detection image of the test battery, the detection image including a first corner detection image and a second corner detection image; a first identification module configured to identify defect information of the test battery based on the detection image; and a second identification module configured to identify a quality detection result of the test battery based on the defect information of the test battery.

[0027] A fourth embodiment of the present application provides a battery manufacturing method, the method including detecting the quality of a test battery using the method according to any one of the above embodiments and determining the quality detection result of the test battery. The battery manufacturing method provided by the embodiment of the present application can identify defects in the test battery and can determine the quality of the test battery based on the defects in the test battery.

[0028] In some embodiments, the method further includes, if the quality detection result of the test battery is unacceptable, discarding the unacceptable battery. By identifying the quality of the test battery based on the quality detection result of the test battery and discarding the unacceptable battery, the stability of the device or equipment to which the battery is applied is improved.

[0029] An embodiment according to a fifth aspect of the present application provides an electronic device, the electronic device including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores commands executable by the at least one processor, and the commands are executed by the at least one processor, thereby enabling the at least one processor to perform the battery detection method described in any one of the above embodiments or the battery manufacturing method described in any one of the above embodiments.

[0030] An embodiment according to a sixth aspect of the present application provides a battery manufacturing apparatus including the electronic device according to the above embodiment.

[0031] An embodiment according to a seventh aspect of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, realizes the battery detection method described in any one of the above embodiments or the battery manufacturing method described in any one of the above embodiments.

[0032] An embodiment according to an eighth aspect of the present application provides a computer program product including a computer program, which, when executed by a processor, realizes the battery detection method according to any one of the above embodiments or the battery manufacturing method according to any one of the above embodiments.

[0033] The above description is only a summary of the technical solution of the present application. In order to more clearly understand the technical solution of the present application, the following provides specific embodiments of the present application, which can be implemented according to the content of the specification, and to more clearly understand the above and other objectives, features and advantages of the present application. [Brief explanation of the drawings]

[0034] In the drawings, unless otherwise specified, the same reference numerals throughout the several views represent the same or similar parts or elements. The drawings are not necessarily drawn to scale. It should be noted that the drawings merely illustrate some embodiments disclosed herein and should not be construed as limiting the scope of the present application.

[0035] [Figure 1] 1 is a structural schematic diagram of a detection device according to some embodiments of the present application; [Figure 2] FIG. 1 is a block diagram of a detection device according to some embodiments of the present application. [Figure 3] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 4] 1 is a schematic diagram of a first surface and an illumination surface according to some embodiments of the present application. [Figure 5] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 6] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 7] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 8] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 9] FIG. 2 is a structural schematic diagram of a detection device according to another embodiment of the present application. [Figure 10] 1 is a flowchart of a battery detection method according to some embodiments of the present application. [Figure 11] 1 is a flowchart of step S101 according to some embodiments of the present application. [Figure 12] 10 is a flowchart of step S114 according to some embodiments of the present application. [Figure 13] 10 is a flowchart of step S1142 according to some embodiments of the present application. [Figure 14] 10 is a flowchart of step S101 according to another embodiment of the present application. [Figure 15] 10 is a flowchart of step S101 according to another embodiment of the present application. [Figure 16] 10 is a flowchart of step S1114 according to some embodiments of the present application. [Figure 17] 10 is a flowchart of step S102 according to some embodiments of the present application. [Figure 18] 1 is a flowchart of a battery manufacturing method according to some embodiments of the present application. [Figure 19] 1 is a flowchart of a battery detection method according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0036] The following detailed description will be given of the embodiments of the technical solution of the present application with reference to the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are merely examples, which do not limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "including" and "having" and their variants in the specification and claims of this application, as well as the description of the drawings above, are intended to be non-exclusive.

[0038] In the description of the embodiments of the present application, the terms "first," "second," etc. are merely used to distinguish between different objects, and should not be understood as indicating or implying relative importance, or the quantity, specific order, or hierarchical relationship of the technical features shown. In the description of the embodiments of the present application, unless otherwise clearly limited, "plurality" means two or more.

[0039] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. Appearances of the term "embodiment" in various places in this specification do not necessarily refer to the same embodiment, nor do they refer to embodiments that are mutually exclusive, independent, or alternative to other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that embodiments described herein can be combined with other embodiments.

[0040] The term "and / or" in the description of the embodiments of the present application merely describes the relationship between related objects and indicates that three types of relationships can exist. For example, A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. In this specification, the symbol " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0041] In describing the embodiments of the present application, the term "plurality" refers to two or more (including two); similarly, "multiple sets" refers to two or more (including two sets), and "plurality" refers to two or more (including two).

[0042] In describing the embodiments of the present application, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the drawings and are intended to make the embodiments of the present application easier to explain and simplify the description, and do not indicate or imply that the target devices or elements have a specific orientation or should be configured or operated in a specific orientation, and therefore should not be understood to limit the embodiments of the present application.

[0043] In describing the embodiments of the present application, unless otherwise clearly specified or limited, terms such as "attached," "connected," "connected," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection. They may also refer to a mechanical connection or an electrical connection. They may also refer to a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two parts. Those skilled in the art will be able to understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0044] At present, the development of market trends shows that the use of power batteries is becoming more and more widespread. Power batteries are not only applied to energy storage power systems such as hydroelectric, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in military equipment and aerospace, etc. As the application fields of power batteries continue to expand, the demand for them in the market is also constantly increasing.

[0045] Batteries can develop defects during the manufacturing and use processes. For example, defects such as wrinkles, folds, and breaks in the polar sheet can occur during the battery manufacturing process, and during use, the polar sheet can be damaged when the battery is subjected to impact. These defects cannot be observed from the outside of the battery and must be detected internally.

[0046] The radiation emitted from the radiation source passes through the battery and is detected by the detector to form a corresponding detected image. When the radiation emitted from the radiation source is perpendicular to the surface of the detection area of ​​the battery, the actual length of the radiation passing through the battery is equal to the thickness of the battery, and the detected image is relatively accurate. When the angle between the radiation emitted from the radiation source and the surface of the detection area of ​​the battery is less than 90°, the actual length of the radiation passing through the battery is greater than the thickness of the battery, and in this case, a certain distortion occurs in the detected image. The smaller the angle between the radiation and the surface of the detection area of ​​the battery, the greater the distortion.

[0047] A stacked battery has a rectangular parallelepiped shape, and the corners of the rectangular parallelepiped are susceptible to impact. Even if a battery that has received an impact appears to have no defects, the polarizing sheet inside the battery may be damaged by the impact, potentially affecting the battery's reliability. In conventional technology, when detecting a battery, a radiation source is positioned corresponding to the center of the battery. The corners of the battery are located further outward, and the angle between the radiation emitted from the radiation source and the surface where the corners of the battery are located is relatively small. As a result, the detected image is distorted significantly. When analyzing the detected image, discrepancies between the detected image and the actual battery condition can lead to erroneous judgments, oversights, and insufficient detection in battery defect detection.

[0048] An embodiment of the present application provides a detection device for detecting a battery, the detection device including a first radiation source, a first detector, a second radiation source, a second detector, a carrier, and a detection unit, wherein the first detector faces an exit port of the first radiation source, and the second detector faces an exit port of the second radiation source. . transportation The slide table is configured to hold the test battery and is movable, with a movement trajectory passing between the first radiation source and the first detector and between the second radiation source and the second detector. The detection unit is connected to the first detector and the second detector. The detection unit detects defects in the test battery based on the radiation received by the first detector and the radiation received by the second detector. The detection device according to an embodiment of the present application detects corners of the test battery and positions the first radiation source and the second radiation source to face the first corner and the second corner of the test battery, respectively. In this way, distortion of the first corner detection image and the second corner detection image can be reduced during detection. This improves the detection accuracy of the interior of the test battery and reduces erroneous determinations, oversights, and insufficient defect detection.

[0049] The detection device for detecting batteries disclosed in the embodiments of the present application can detect not only batteries immediately after manufacture, but also batteries that have been used for a certain period of time, thereby improving the accuracy of detecting the inside of the battery and reducing erroneous judgments, oversights, and insufficient defect detection.

[0050] Embodiments of the present application provide a detection device for detecting batteries, and FIG. 1 is a structural schematic diagram of a detection device according to some embodiments of the present application. For ease of explanation, FIG. 1 also shows a test battery 300. The test battery 300 is a stacked battery, and the detection device includes a first radiation source 10, a first detector 11, a second radiation source 20, a second detector 21, and a transport platform 100. The first detector 11 faces the exit port of the first radiation source 10, and the second detector 21 faces the exit port of the second radiation source 20. The transport platform 100 is configured to carry the test battery 300 and is movable, with a movement path passing between the first radiation source 10 and the first detector 11 and between the second radiation source 20 and the second detector 21.

[0051] 2 is a block diagram of a detection apparatus according to some embodiments of the present application. Referring to FIG. 2, the detection apparatus further includes a detection unit 200. The detection unit 200 is connected to each of the first detector 11 and the second detector 21. The detection unit 200 is configured to detect defects in the test battery 300 based on the radiation received by the first detector 11 and the radiation received by the second detector 21.

[0052] In the embodiment of the present application, the radiation emitted from the radiation sources such as the first radiation source 10 and the second radiation source 20 is both transparent, and the degree of attenuation of the radiation varies depending on the thickness of the material, which results in differences in the amount of radiation detected by the detectors such as the first detector 11 and the second detector 21. A layer of photoluminescent material is provided inside the detector, and the photosensitive material emits light when exposed to radiation. The optical signal is transmitted to a photoelectric converter and converted into an electrical signal, which is then output as a digital signal via an internal electrical signal transmission circuit. , Ming Dark Contrast Image with is formed It is being The radiation that passes through the object is attenuated to a certain extent, and the more radiation that passes through, the more luminescence signal there is in the photosensitive material, and the brighter the area appears in the final image. Conversely, the less radiation that passes through, the darker the area appears in the image.

[0053] Referring to FIG. 1 , the test battery 300 includes a first corner 1 and a second corner 2. In the present embodiment, radiation emitted from a first radiation source 10 passes through the first corner 1 of the test battery 300 placed on a carrier 100 and is projected onto a first detector 11, which is configured to determine a first corner detection image of the first corner based on the received radiation. Radiation emitted from a second radiation source 20 passes through a second corner 2 of the test battery 300 placed on a carrier 100 and is projected onto a second detector 21, which is configured to determine a second corner detection image of the second corner based on the received radiation. That is, the detection unit 200 is configured to detect defects in the test battery 300 based on the first corner detection image and the second corner detection image.

[0054] In the embodiment of the present application, the first detector 11 faces the exit port of the first radiation source 10, and when the first corner 1 of the test battery 300 moves between the first detector 11 and the first radiation source 10, the radiation emitted from the first radiation source 10 passes through the test battery 300 and is detected by the first detector 11, thereby displaying an image of the first corner 1 of the test battery 300 and obtaining a first corner detection image.

[0055] In the embodiment of the present application, the second detector 21 faces the emission port of the second radiation source 20, and when the second corner 2 of the test battery 300 moves between the second detector 21 and the second radiation source 20, the radiation emitted from the second radiation source 20 passes through the test battery 300 and is detected by the second detector 21, thereby displaying an image of the second corner 2 of the test battery 300 and obtaining a second corner detection image.

[0056] The stacked battery has a shape similar to a rectangular parallelepiped, and the rectangular parallelepiped has eight corners. The test battery 300 has two large faces that face each other and four side faces that connect the two large faces. In one embodiment of the present application, the first corner 1 and the second corner 2 may be two adjacent corners on the same face. For example, the first corner 1 and the second corner 2 are two adjacent corners on the same large face.

[0057] For example, when detecting the battery under test 300 using a detection device, the battery under test 300 is placed on the transport platform 100, and the transport platform 100 is moved so that a large surface (e.g., first surface 5) of the battery under test 300 is in close contact with the load-receiving surface of the transport platform 100. In other words, the thickness direction Z of the battery under test 300 is perpendicular to the load-receiving surface. In this case, the first corner 1 and the second corner 2 may be two corners on the large surface of the battery under test 300 that faces the radiation source.

[0058] The test battery 300 further includes a third corner 3 and a fourth corner 4. The third corner 3 and the fourth corner 4, as well as the first corner 1 and the second corner 2, are located on the same plane on the test battery 300. After the detection device detects the first corner 1 and the second corner 2 of the test battery 300, the test battery 300 or the detection device can be moved so that the first radiation source 10 faces the third corner 3 and the second radiation source 20 faces the fourth corner 4, respectively, thereby detecting the third corner 3 and the fourth corner 4. Because radiation is transparent, it passes through the corresponding corners during detection. Therefore, all corners of the test battery 300 can be detected by the detection device.

[0059] In one embodiment of the present application, the first radiation source 10 and the second radiation source 20 may be radiation sources of the same radiation, for example, the first radiation source 10 and the second radiation source 20 are both X-radiation sources, or the first radiation source 10 and the second radiation source 20 are both α-radiation sources, or the first radiation source 10 and the second radiation source 20 are both β-radiation sources, or the first radiation source 10 and the second radiation source 20 are both γ-radiation sources.

[0060] In another embodiment of the present application, the first radiation source 10 and the second radiation source 20 may be radiation sources of different radiation, for example, one of the first radiation source 10 and the second radiation source 20 may be an X-radiation source, and the other of the first radiation source 10 and the second radiation source 20 may be an α-radiation source, or one of the first radiation source 10 and the second radiation source 20 may be an α-radiation source, and the other of the first radiation source 10 and the second radiation source 20 may be a β-radiation source, or other combinations may be used. The embodiments of the present application are not limited thereto.

[0061] In one embodiment of the present application, the first detector 11 and the second detector 21 may be the same detector, for example, the first detector 11 and the second detector 21 may both be flat-plate detectors, or the first detector 11 and the second detector 21 may both be linear array detectors.

[0062] For example, a detector using cesium iodide as a photosensitive material is used as the detector.

[0063] In another embodiment of the present application, the first detector 11 and the second detector 21 may be different detectors, for example, one of the first detector 11 and the second detector 21 may be a flat panel detector, and the other of the first detector 11 and the second detector 21 may be a linear array detector.

[0064] Illustratively, the linear array detector may include a Time Delay Integration (TDI) detector.

[0065] In an embodiment of the present application, a conveyor belt can be used as the transport platform 100, and the test battery 300 can be placed on it. Alternatively, a circular guide rail can be used as the transport platform 100, and the test battery 300 can be placed on the circular guide rail. When the conveyor belt or circular guide rail moves, the test battery 300 placed on it also moves at the same time, allowing for continuous detection and improving detection efficiency.

[0066] In the present embodiment, the connection between the detection unit 200 and the first detector 11 and between the detection unit 200 and the second detector 21 may be a wired connection or a wireless connection.

[0067] In the present embodiment, the first radiation source 10 and the first detector 11 cooperate to detect the first corner 1 of the test battery 300, and the second radiation source 20 and the second detector 21 cooperate to detect the second corner 2 of the test battery 300. This allows the angle between the radiation and the plane on which the first corner 1 and the second corner 2 of the test battery 300 are located to be as close to 90° as possible when detecting defects in the test battery 300, thereby reducing distortion in the first corner detection image and the second corner detection image. As a result, the first corner detection image more closely resembles the actual state of the first corner 1 of the test battery 300, and the second corner detection image more closely resembles the actual state of the second corner 2 of the test battery 300. By using the first corner detection image and the second corner detection image to detect defects in the corners of the test battery 300, the detection unit can more fully detect defects inside the test battery 300 and reduce erroneous detection, oversights, and insufficient defect detection.

[0068] In the prior art, in the central region of the test battery 300, radiation enters from one large surface of the test battery 300 and exits from the other large surface of the test battery 300. Near the corners of the test battery 300, the angle between the radiation and the large surface of the test battery 300 is small, so there is a possibility that radiation enters from the large surface of the test battery 300 and exits from the side of the test battery 300, making distortion at the corners of the test battery 300 more pronounced. In the embodiment of the present application, the first radiation source 10 and the second radiation source 20 face the first corner and the second corner of the test battery 300, respectively, so that the angle between the radiation and the large surface of the test battery 300 near the first corner and the second corner of the test battery 300 can be made closer to 90°, which prevents the radiation from entering through the large surface of the test battery 300 and exiting from the side of the test battery 300, thereby reducing distortion in the first corner detection image and the second corner detection image.

[0069] In one embodiment of the present application, the first corner 1, the second corner 2, the third corner 3, and the fourth corner 4 are all located on the first surface 5. During detection, the positions of the detection device and the test battery 300 are moved so that the center line of the radiation emitted from the first radiation source 10 passes through the vertex of the first corner 1 and is perpendicular to the first surface 5, and the center line of the radiation emitted from the second radiation source 20 passes through the vertex of the second corner 2 and is perpendicular to the first surface 5, thereby reducing the influence of distortion.

[0070] In the embodiment of the present application, when the first radiation source 10 and the second radiation source 20 are placed during the detection process, the first radiation source 10 can be positioned to correspond to the first corner 1 of the test battery 300, and the second radiation source 20 can be positioned to correspond to the second corner 2 of the test battery 300. This allows the first corner 1 and the second corner 2 to be detected simultaneously, further improving detection efficiency.

[0071] In some embodiments of the present application, the size D1 of the radiation source focus of the first radiation source 10 and the size D2 of the radiation source focus of the second radiation source 20 satisfy D1≦10 μm and / or D2≦10 μm.

[0072] Illustratively, the size of the radiation source focal spot may be the diameter of the radiation source focal spot.

[0073] For example, the size D1 of the radiation source focus of the first radiation source 10 is 10 μm or less, or the size D2 of the radiation source focus of the second radiation source 20 is 10 μm or less, or the size D1 of the radiation source focus of the first radiation source 10 is 10 μm or less and the size D2 of the radiation source focus of the second radiation source 20 is also 10 μm or less.

[0074] In the present embodiment, an electron lens focuses the electron beam to a point on the target that becomes the source focus.

[0075] The smaller the radiation source focal point, the smaller the geometrical unsharpness of the radiation transmitted through the object, and the higher the resolution. In the embodiment of the present application, the size of the radiation source focal point of at least one of the first radiation source 10 and the second radiation source 20 is limited to 10 μm or less, thereby improving the imaging quality of at least one corner and reducing the influence of distortion on the detection of defects in the test cell 300.

[0076] FIG. 3 is a structural schematic diagram of a detection device according to another embodiment of the present invention, based on some embodiments of the present invention. For ease of explanation, FIG. 3 also shows a test battery 300. Referring to FIG. 3, the test battery 300 further includes a first surface 5, which is perpendicular to the thickness direction Z of the test battery 300, and both the first corner 1 and the second corner 2 are located on the first surface 5. The detection device further includes a third radiation source 30 and a third detector 31, which faces the exit port of the third radiation source 30. The movement trajectory of the transport platform 100 further passes between the third radiation source 30 and the third detector 31. The detection unit 200 is further configured to detect defects in the test battery based on the radiation received by the third detector 31.

[0077] In the present embodiment, the first surface 5 is a large surface of the test battery 300, and the exit of the third radiation source 30 faces the third detector 31. When the first surface 5 of the test battery 300 moves between the third detector 31 and the third radiation source 30, the radiation emitted from the third radiation source 30 passes through the test battery 300 and is detected by the third detector 31, thereby displaying an image of the first surface 5 of the test battery 300.

[0078] The radiation emitted from the third radiation source 30 passes through the first surface 5 of the test battery 300 placed on the transport table 100 and is projected onto the third detector 31, and the third detector 31 generates a first surface detection image of the first surface 5 based on the received radiation, and the detection unit 200 can detect defects in the test battery 300 based on the first surface detection image.

[0079] In the embodiments of the present application, the type of the third radiation source 30 may be the same as either one of the first radiation source 10 and the second radiation source 20, or may be the same as both the first radiation source 10 and the second radiation source 20, or may even be a type different from both of them.

[0080] Exemplarily, the third radiation source 30 may be any one of an X-ray source, an α-ray source, a β-ray source, and a γ-ray source.

[0081] In the embodiments of the present application, by detecting the defects on the first surface 5 of the battery under test 300 in cooperation with the third radiation source 30 and the third detector 31, the entire battery under test 300 can be detected, and the defects of the battery under test 300 can be detected more thoroughly.

[0082] In one embodiment of the present application, during detection, the positions of the detection device and the battery under test 300 are moved, and the center line of the radiation emitted from the third radiation source 30 passes through the side where the first corner 1 and the second corner 2 are located and is perpendicular to the first surface 5, so that the influence of distortion can be reduced in this way. Exemplarily, the center line of the radiation emitted from the third radiation source 30 passes through the midpoint of the side where the first corner 1 and the second corner 2 are located.

[0083] According to some embodiments of the present application, the size D3 of the radiation source focus of the third radiation source 30 satisfies 10μm < D3 ≤ 30μm.

[0084] Exemplarily, the size D3 of the radiation source focus of the third radiation source 30 is 20μm.

[0085] In the embodiment of the present application, since the distortion in the center of the test cell 300 is small, an extremely small radiation source focus is not required for imaging. If the size of the radiation source focus of the third radiation source 30 is 10 μm or less, the imaging quality is good, but the detection time is long and the efficiency is reduced. If the size of the radiation source focus of the third radiation source 30 is larger than 30 μm, the imaging quality is degraded and the detection accuracy is reduced. By setting the size of the radiation source focus of the third radiation source 30 to be larger than 10 μm and smaller than 30 μm, the imaging quality can be improved, the detection time can be shortened, and work efficiency can be increased.

[0086] According to some embodiments of the present application, the area of ​​the irradiation surface of the third radiation source 30 on the first surface 5 of the test cell 300 is equal to or greater than half the area of ​​the first surface 5. The first surface 5 is the surface of the test cell 300 that faces the exit port of the third radiation source 30.

[0087] In the present embodiment, the first surface 5 may be a large surface of the battery under test 300 .

[0088] When the radiation emitted from the radiation source is completely projected onto the object to be detected, the irradiation surface formed by the radiation source on the object to be detected is generally circular. Figure 4 is a schematic diagram of a first surface and an irradiation surface according to some embodiments of the present application. Referring to Figure 4, the first surface 5 includes a first region 51 and a second region 52, and the areas of the first region 51 and the second region 52 are equal. The irradiation surface 32 formed on the first surface 5 by the third radiation source 30 includes at least one of the first region 51 and the second region 52. The two irradiation surfaces 32 may overlap.

[0089] In the detection device shown in Fig. 3, the first radiation source 10, the second radiation source 20, and the third radiation source 30 are arranged close to each other, and the third radiation source 30 is located between the first radiation source 10 and the second radiation source 20, so that the first radiation source 10, the second radiation source 20, and the third radiation source 30 can detect the same test cell 300 in the same detection. As shown in Fig. 3, the third radiation source 30, the first radiation source 10, and the second radiation source 20 are located on a straight line. In this manner, the positions of the detection device and the test cell 300 are moved, and in the first detection, the center line of the radiation emitted from the first radiation source 10 passes through the vertex of the first corner 1 and is perpendicular to the first surface 5, while the center line of the radiation emitted from the second radiation source 20 passes through the vertex of the second corner 2 and is perpendicular to the first surface 5, and while the center line of the radiation emitted from the third radiation source 30 passes through the midpoint of the side where the first corner 1 and the second corner 2 are located. During the second detection, the center line of the radiation emitted from the first radiation source 10 passes through the vertex of the third corner 3 and is perpendicular to the first surface 5, while the center line of the radiation emitted from the second radiation source 20 passes through the vertex of the fourth corner 4 and is perpendicular to the first surface 5, and while the center line of the radiation emitted from the third radiation source 30 passes through the midpoint of the side on which the third corner 3 and the fourth corner 4 exist.

[0090] In other embodiments, the third radiation source 30, the first radiation source 10 and the second radiation source 20 do not necessarily have to be aligned in a straight line.

[0091] FIG. 5 is a structural schematic diagram of a detection device according to another embodiment of the present application. The difference between FIG. 3 and FIG. 5 is that the test battery 300 moves a fixed distance along a first direction X. Using the positional relationship of the detection device shown in FIG. 3 and FIG. 5, the first radiation source 10, the second radiation source 20, and the third radiation source 30 are arranged along the direction Y of a line connecting the first corner 1 and the second corner 2 in FIG. 3 and FIG. 5. In some embodiments of the present application, the first direction X, the direction Y of the line connecting the first corner 1 and the second corner 2, and the thickness direction Z are perpendicular to each other.

[0092] As shown in Figures 3 and 5, detection of one test battery 300 is performed in two stages. First, referring to Figure 3, the first radiation source 10 and first detector 11 detect the first corner 1 of the test battery 300, the second radiation source 20 and second detector 21 detect the second corner 2 of the test battery 300, and the third radiation source 30 and third detector 31 detect the first region 51 of the first surface 5 of the test battery 300. Next, the test battery 300 is moved along the first direction X. Referring to Figure 5, the third radiation source 30 and third detector 31 detect the second region 52 of the first surface 5 of the test battery 300, the first radiation source 10 and first detector 11 detect the third corner 3 of the test battery 300, and the second radiation source 20 and second detector 21 detect the fourth corner 4 of the test battery 300. Subsequently, detection of one battery 300 can be completed based on the above steps.

[0093] In the present embodiment, FIG. 5 shows, relative to FIG. 3, that the distance traveled by the test battery 300 along the first direction X is equal to the distance between the first corner 1 and the third corner 3.

[0094] 6 to 9 are structural schematic diagrams of a detection device according to another embodiment of the present application. For ease of explanation, FIGS. 6 to 9 also show a test cell 300. Referring to FIGS. 6 to 9, the first radiation source 10 and the second radiation source 20 are disposed close to each other, and the third radiation source 30 is disposed at a position farther away from the first radiation source 10 and the second radiation source 20. In FIGS. 6 to 9, the third radiation source 30 is located to the right of the first radiation source 10, and the third radiation source 30 is located to the right of the second radiation source 20. In another embodiment, the third radiation source 30 may be located to the left of the first radiation source 10, and the third radiation source 30 is located to the left of the second radiation source 20. The movement trajectory of the transport platform 100 passes between the first radiation source 10 and the first detector 11, between the second radiation source 20 and the second detector 21, and between the third radiation source 30 and the third detector 31.

[0095] 6 to 9, the positional relationship of the detection device will be used for explanation. The test battery 300 includes a first test battery 301 and a second test battery 302, and the second test battery 302 is located downstream of the first test battery 301 along the direction of movement of the test battery 300. During detection, referring to FIG. 6, the third radiation source 30 and the third detector 31 first detect a first region 51 on the first surface 5 of the first test battery 301, and then the transport platform 100 is controlled to move along the first direction X. Referring to FIG. 7, the third radiation source 30 and the third detector 31 detect a second region 52 on the first surface 5 of the first test battery 301. The transport platform 100 is further controlled to move along the first direction X, and as shown in FIG. 8 , the first radiation source 10 and the first detector 11 detect the first corner 1 of the first test battery 301, and the second radiation source 20 and the second detector 21 detect the second corner 2 of the first test battery 301. At this time, the first region 51 on the first surface 5 of the second test battery 302 moves between the third radiation source 30 and the third detector 31, and the third radiation source 30 and the third detector 31 detect the first region 51 on the first surface 5 of the second test battery 302. Next, the transport platform 100 is controlled to move further along the first direction X, and as shown in FIG. 9 , the first radiation source 10 and the first detector 11 detect the third corner 3 of the first test battery 301, and the second radiation source 20 and the second detector 21 detect the fourth corner 4 of the first test battery 301. The third radiation source 30 and the third detector 31 detect the second region 52 on the first surface 5 of the second test battery 302. Thereafter, the transport platform 100 is controlled to move again along the first direction X, thereby detecting the corner of the second test battery 302. By repeating this cycle, multiple test batteries 300 can be detected consecutively.

[0096] In the above steps, the first surface 5 of the battery under test 300 is detected first, and then the corners of the battery under test 300 are detected. In other embodiments, the corners of the battery under test 300 may be detected first, and then the first surface 5 of the battery under test 300 may be detected. In this case, in the detection process shown in Figures 6 to 9, the transport platform 100 may be controlled to move rightward along the first direction X.

[0097] In the present embodiment, when the first radiation source 10 and the first detector 11 detect the first corner 1 of the test cell 300, the line connecting the center of the radiation source focus of the first radiation source 10 to the first corner 1 needs to be perpendicular to the first surface 5, thereby reducing the influence of distortion on the detection results. Similarly, when the second radiation source 20 and the second detector 21 detect the second corner 2 of the test cell 300, the line connecting the center of the radiation source focus of the second radiation source 20 to the center of the second corner 2 needs to be perpendicular to the first surface 5. When the first radiation source 10 and the first detector 11 detect the third corner 3 of the test cell 300, the line connecting the center of the radiation source focus of the first radiation source 10 to the third corner 3 needs to be perpendicular to the first surface 5. Similarly, when the second radiation source 20 and the second detector 21 detect the fourth corner 4 of the test cell 300, the line connecting the center of the radiation source focus of the second radiation source 20 to the center of the fourth corner 4 needs to be perpendicular to the first surface 5.

[0098] In the present embodiment, when the third radiation source 30 and the third detector 31 detect the first region 51 on the first surface 5 of the test cell 300, the line connecting the center of the radiation source focus of the third radiation source 30 to the centers of the first corner 1 and the second corner 2 needs to be perpendicular to the first surface 5. This reduces the influence of distortion on the detection results. When the third radiation source 30 and the third detector 31 detect the second region 52 on the first surface 5 of the test cell 300, the line connecting the center of the radiation source focus of the third radiation source 30 to the centers of the third corner 3 and the fourth corner 4 needs to be perpendicular to the first surface 5. This reduces the influence of distortion on the detection results. The center line of the radiation emitted from the third radiation source 30 passes through the midpoint of the side edge where the first corner 1 and the second corner 2 are located, or the midpoint of the side edge where the third corner 3 and the fourth corner 4 are located.

[0099] In the present embodiment, the area of ​​the irradiation surface of the third radiation source 30 on the first surface 5 is more than half the area of ​​the first surface 5. The first surface 5 can be detected by two detections, and the entire first surface 5 can be more fully detected by detecting both sides. For example, in the first detection, the third radiation source 30 and the third detector 31 are positioned opposite the left portion of the first surface 5 to detect the left portion of the first surface 5. Thereafter, the test cell 300 or the third radiation source 30 and the third detector 31 are moved to face the right portion of the first surface 5 to detect the right portion of the first surface 5. By controlling the positional relationship between the first surface 5 and the third radiation source 30 and the third detector 31, the entire irradiation surface of the third radiation source 30 on the first surface 5 completely covers the first surface 5 in the two detections, allowing for more fully-accurate detection.

[0100] According to some embodiments of the present application, the first radiation source 10, the second radiation source 20, and the third radiation source 30 are all located on the same side of the carrier 100, as shown in FIG.

[0101] In the present embodiment, the first radiation source 10 , the second radiation source 20 , and the third radiation source 30 may be located on the same side of the carrier 100 as the test cell 300 .

[0102] In the embodiment of the present application, the first radiation source 10, the second radiation source 20, and the third radiation source 30 are all arranged on the same side of the transport table 100, and the first detector 11, the second detector 21, and the third detector 31 are arranged on the other side of the transport table 100, thereby making the layout easier.

[0103] In some embodiments of the present application, at least one of the first radiation source 10, the second radiation source 20 and the third radiation source 30 is an integrated radiation source.

[0104] Illustratively, one of the first radiation source 10, the second radiation source 20 and the third radiation source 30 is an integrated radiation source, or two of the first radiation source 10, the second radiation source 20 and the third radiation source 30 are integrated radiation sources, or all of the first radiation source 10, the second radiation source 20 and the third radiation source 30 are integrated radiation sources.

[0105] Illustratively, the first radiation source 10, the second radiation source 20 and the third radiation source 30 are all sealed, integral X-ray tubes.

[0106] The integrated radiation source has a low rework rate, high stability, small volume, and easy later maintenance, so that the reliability of the detection device can be improved by using the first radiation source 10, the second radiation source 20, or the third radiation source 30 as an integrated radiation source.

[0107] The embodiments of the present application provide a battery detection method for detecting a test battery 300 including a first corner 1 and a second corner 2 using the detection device according to the above embodiments. FIG. 10 is a flowchart of the battery detection method according to some embodiments of the present application. As shown in FIG. 10, the detection method includes: Step S101 of acquiring a detected image of a test battery, Step S101, in which the detected image includes a first corner detection image and a second corner detection image; Step S102: identifying defect information of the test battery based on the detected image; and step S103 of determining the quality detection result of the test battery based on the defect information of the test battery.

[0108] In the present embodiment, the first corner detection image of the test battery 300 is obtained by using the first radiation source 10 and the first detector 11 in cooperation to detect the first corner 1 of the test battery 300. The second corner detection image of the test battery 300 is obtained by using the second radiation source 20 and the second detector 21 in cooperation to detect the second corner 2 of the test battery 300.

[0109] In the present embodiment, defect information of the test battery 300 includes morphological defects such as wrinkles and breaks in the polarizing sheet.

[0110] In the present embodiment, the quality detection result of the test battery 300 is used to indicate whether the test battery 300 is pass or fail.

[0111] In the present embodiment, if a wrinkle or break occurs in the polarity sheet near the first corner 1 or the second corner 2 of the test battery 300, a change in gray scale appears in the first corner detection image or the second corner detection image. Based on the change in gray scale in the first corner detection image or the second corner detection image, defect information of the test battery 300 can be identified.

[0112] In the embodiment of the present application, errors in the detected image can be reduced by calibrating the detector before starting detection. For example, the detector needs to be calibrated before starting actual operation. Before calibration, it is necessary to ensure that there are no foreign objects at the radiation source exit and on the detector surface, and that there are no obstructions between the radiation source and the detector, and that the radiation irradiates the entire light-receiving surface of the detector. At this time, the grayscale value of the image formed by the detection device may be adjusted to the calibrated grayscale value.

[0113] In the embodiment of the present application, a first corner detection image and a second corner detection image of the test battery 300 are acquired, and the first corner detection image and the second corner detection image are analyzed to identify defect information of the test battery 300. This reduces distortions contained in the first corner detection image and the second corner detection image, making the first corner detection image closer to the actual state of the first corner 1 of the test battery 300 and the second corner detection image closer to the actual state of the second corner 2 of the test battery 300. This allows for more thorough detection of defects within the test battery 300 and reduces problems such as erroneous detection, oversight, and insufficient defect detection.

[0114] According to some embodiments of the present application, Figure 11 is a flowchart of step S101 according to some embodiments of the present application. As shown in Figure 11, step S101 includes: a step S111 of controlling the first corner portion to be located between the first radiation source and the first detector, and the second corner portion to be located between the second radiation source and the second detector; Step S112: Controlling radiation emitted from the first radiation source so that the radiation passes through a first corner of the test cell and is projected onto a first detector; Step S113: Controlling the radiation emitted from the second radiation source so that the radiation passes through the second corner of the test cell and is projected onto the second detector; a step S114 of identifying a first corner detection image based on the radiation received by the first detector; a step S115 of determining a second corner detection image based on the radiation received by the second detector; and step S116 of identifying a detection image of the test battery based on the first corner detection image and the second corner detection image.

[0115] In the embodiment of the present application, the test cell 300 may be controlled to move during the detection process, or the first radiation source 10, the second radiation source 20, the first detector 11, and the second detector 21 may be controlled to move. As a result, the first corner 1 is located between the first radiation source 10 and the first detector 11, and the second corner 2 is located between the second radiation source 20 and the second detector 21.

[0116] In the present embodiment, the movement of the transport platform 100 can be controlled to move the test battery 300 .

[0117] In the embodiment of the present application, the test battery 300 is held on the transport platform 100 by a mechanical arm, and the transport platform 100 can transport the test battery 300 to a detection position. In the process of holding the test battery 300 by the mechanical arm, it is necessary to guarantee the accuracy of the holding position so as to provide more accurate initial information for subsequent processing and ensure the quality of subsequent imaging.

[0118] In the present embodiment, a buffer member is provided on the gripping portion of the mechanical arm, thereby reducing damage to the test battery 300 during the gripping process. A positioning stopper is provided on the transport platform 100, thereby increasing the stability of the test battery 300 during transport.

[0119] In the embodiment of the present application, the above steps S112 and S113 may be executed simultaneously or separately, and step S112 may be executed before step S113 or step S112 may be executed after step S113. Similarly, the above steps S114 and S115 may be executed simultaneously or separately, and step S114 may be executed before step S115 or step S114 may be executed after step S115.

[0120] In the embodiment of the present application, there is no order relationship between the above steps S113 and S114, and steps S113 and S114 may be performed simultaneously, or step S114 may be performed before step S113, or step S114 may be performed after step S113. However, it is necessary to ensure that step S114 is performed after step S112.

[0121] Similarly, there is no order between step S112 and step S115, and step S115 and step S112 may be executed simultaneously, step S115 may be executed before step S112, or step S115 may be executed after step S112. However, it is necessary to ensure that step S115 is executed after step S113.

[0122] In the present embodiment, the first corner 1 is controlled to be located between the first radiation source 10 and the first detector 11, and the second corner 2 is controlled to be located between the second radiation source 20 and the second detector 21. This allows the angle between the radiation and the plane on which the first corner 1 and the second corner 2 of the test battery 300 are located to be as close to 90° as possible when detecting defects in the test battery 300, thereby reducing distortion in the first corner detection image and the second corner detection image. As a result, the first corner detection image more closely resembles the actual state of the first corner 1 of the test battery 300, and the second corner detection image more closely resembles the actual state of the second corner 2 of the test battery 300. Using the first corner detection image and the second corner detection image to detect defects in the corners of the test battery 300 allows for more accurate detection of defects within the test battery 300, reducing erroneous detection, oversights, and insufficient defect detection.

[0123] According to some embodiments of the present application, Figure 12 is a flowchart of step S114 according to some embodiments of the present application. As shown in Figure 12, step S114 includes: Step S1141: acquiring a plurality of first raw images including the first corner based on the radiation received by the first detector; and step S1142 of processing the plurality of first raw images to obtain a first corner-detection image.

[0124] In the present embodiment, when the first raw image is an unprocessed image, the first corner 1 or the second corner 2 of the test battery 300 in the image is not clear enough. By processing multiple first raw images, the first corner 1 or the second corner 2 in the image becomes clearer, making it easier to identify defects in the test battery 300.

[0125] If only one raw image is acquired, and if that image contains errors, errors will also occur in the first corner detection image obtained by subsequent processing, which may affect detection accuracy.In the embodiment of the present application, by collecting and processing multiple first raw images, even if one first raw image contains errors, the other first raw images will still be accurate, and the impact of errors on the detection result can be reduced.

[0126] In the embodiment of the present application, when the test cell 300, the first radiation source 10 and the first detector 11 are all fixed during the image acquisition process, the difference between the multiple first raw images is small.

[0127] According to some embodiments of the present application, Figure 13 is a flowchart of step S1142 according to some embodiments of the present application. As shown in Figure 13, step S1142 includes: Step S11421 of filtering a plurality of first raw images to obtain first filtered images; Step S11422 of performing noise reduction processing on the first filtered image to obtain a first noise-reduced image; Step S11423 includes extracting a first detection region from the first noise-reduced image to obtain a first corner detection image, where the first detection region is a region in the first noise-reduced image that includes the first corner.

[0128] In the present embodiment, the filtering may include average filtering, Gaussian filtering, etc., which can remove irrelevant information in the plurality of first raw images and improve the S / N ratio of the first raw images.

[0129] In the embodiment of the present application, noise reduction is performed on the first filtered image to obtain a first noise-reduced image, thereby removing random noise such as quantum noise, alias noise, and electronic noise from the first filtered image, and significantly improving the S / N ratio of the first filtered image.

[0130] The first raw image collected by the first radiation source 10 and the first detector 11 includes not only the first corner but also other regions. In the embodiment of the present application, by cutting out the region including the first corner 1, it is possible to reduce the amount of subsequent calculations and also to reduce the influence of errors in other regions on the detection of defects in the first corner 1.

[0131] In the present embodiment, the first corner-detected image can be obtained by processing the first raw images through the above steps. In a similar manner, the second detector can be controlled to collect second raw images including the second corner, and the second raw images can be processed as described above to obtain the second corner-detected image.

[0132] According to some embodiments of the present application, the first corner 1 and the second corner 2 are adjacent to each other, and the test battery 300 further includes adjacent third corner 3 and fourth corner 4. The third corner 3 is adjacent to the first corner 1, and the fourth corner 4 is adjacent to the second corner 2. FIG. 14 is a flowchart of step S101 according to another embodiment of the present application. As shown in FIG. 14, step S101 further includes: a step S117 of controlling the movement of the test cell so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector; Step S118: Controlling the radiation emitted from the first radiation source so that the radiation passes through the third corner of the test cell and is projected onto the first detector; Step S119: Controlling the radiation emitted from the second radiation source so that the radiation passes through the fourth corner of the test cell and is projected onto the second detector; a step S1110 of identifying a third corner detection image of the third corner based on the radiation received by the first detector; a step S1111 of identifying a fourth corner detection image of the fourth corner based on the radiation received by the second detector; and step S1112 of identifying a detection image of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, and the fourth corner detection image.

[0133] In the present embodiment, the movement of the transport platform 100 can be controlled to move the test battery 300 .

[0134] In the embodiment of the present application, the above steps S118 and S119 may be executed simultaneously or separately, and step S118 may be executed before step S119 or step S118 may be executed after step S119. Similarly, the above steps S1110 and S1111 may be executed simultaneously or separately, and step S1110 may be executed before step S1111 or step S1110 may be executed after step S1111.

[0135] In the embodiment of the present application, there is no order relationship between the above steps S119 and S1110, and steps S1110 and S119 may be performed simultaneously, step S1110 may be performed before step S119, or step S1110 may be performed after step S119. However, it is necessary to ensure that step S1110 is performed after step S118.

[0136] Similarly, there is no order between step S118 and step S1111, and step S1111 and step S118 may be executed simultaneously, step S1111 may be executed before step S118, or step S1111 may be executed after step S118. However, it is necessary to ensure that step S1111 is executed after step S119.

[0137] In the embodiment of the present application, the above steps can also detect the third corner 3 and fourth corner 4 of the test battery 300, so the test battery 300 can be detected more thoroughly, and the third corner detection image approaches the actual state of the third corner 3 of the test battery 300, and the fourth corner detection image approaches the actual state of the fourth corner 4 of the test battery 300. This can reduce the problems of erroneous judgment, oversight, and insufficient defect detection.

[0138] According to some embodiments of the present application, the test battery 300 is placed on the carrier 100, with the third corner 3 and the first corner 1 arranged along the first direction X, and the fourth corner 4 and the second corner 2 arranged along the first direction X. In this case, step S117 is The method includes step S1171 of controlling movement of the transport platform along the first direction so that the third corner is located between the first radiation source and the first detector, and the fourth corner is located between the second radiation source and the second detector.

[0139] In this embodiment, the first direction X is parallel to one side of the first surface 5. Since the test battery 300 has a rectangular parallelepiped shape, the distance between the third corner 3 and the first corner 1 is equal to the distance between the fourth corner 4 and the second corner 2.

[0140] For example, the distance by which the carrier 100 is moved along the first direction X is equal to the distance between the third corner 3 and the first corner 1 .

[0141] In the present embodiment, controlling the movement of the transport platform 100 is easier than controlling the movement of the test battery 300, and since there is no need to change the relative position of the test battery 300 and the transport platform 100, the test battery 300 becomes more stable.

[0142] According to some embodiments of the present application, the test battery 300 further includes a first surface 5, which is perpendicular to the thickness direction Z of the test battery 300, and both the first corner 1 and the second corner 2 are located on the first surface 5. FIG. 15 is a flowchart of step S101 according to another embodiment of the present application. As shown in FIG. 15, step S101 includes the following steps: a step S1113 of controlling the first surface to be located between a third radiation source and a third detector; Step S1114: Controlling radiation emitted from the third radiation source so that the radiation passes through the first surface of the test cell and is projected onto the third detector; a step S1115 of determining a first surface-detected image of the first surface based on the radiation received by the third detector; and step S1116 of identifying defect information of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, the fourth corner detection image, and the first surface detection image.

[0143] In the present embodiment, there is no strict order restriction on the detection of the first surface 5 of the test battery 300 and the detection of the corners of the test battery 300, and they may be performed simultaneously or in stages. For the related steps, please refer to the description of the detection device shown in Figures 3 to 9.

[0144] In the embodiment of the present application, the first surface 5 further included in the test battery 300 is detected through the above steps, so that the test battery 300 can be detected more adequately.

[0145] According to some embodiments of the present application, the first surface 5 includes a first region 51 and a second region 52 that are interconnected. Figure 16 shows a flowchart of step S1114 according to some embodiments of the present application. As shown in Figure 16, step S1114 includes: a step S11141 of controlling radiation emitted from a third radiation source to pass through at least the first region and project onto a third detector; and a step S11142 of controlling the radiation emitted from the third radiation source to pass through at least the second region and to be projected onto the third detector.

[0146] In the embodiment of the present application, by controlling the movement of the test cell 300, the third radiation source 30 can be controlled to face the first region 51 and the second region 52, respectively, during the detection process on both sides.

[0147] In an embodiment of the present application, a first area detection image and a second area detection image can be respectively identified based on the radiation received by the third detector, and a first surface detection image of the first surface can be further identified based on the first area detection image and the second area detection image.

[0148] In the embodiment of the present application, by detecting the first surface 5 twice, it is possible to reduce the number of times the first surface 5 is not detected, and thereby it is possible to more adequately detect defects in the test battery 300 .

[0149] According to some embodiments of the present application, Figure 17 is a flowchart of step S102 according to some embodiments of the present application. As shown in Figure 17, step S102 includes: Step S121: Identifying the number and / or size of defects in the test battery based on the detected image; and step S122 of identifying defect information of the test battery based on the number of defects and / or the defect size.

[0150] In the present embodiment, both the number of defects and the defect size are indicators for evaluating defects in the test battery 300, where the number of defects is the sum of all the defects in the test battery 300 and the defect size is the individual size of each defect.

[0151] According to some embodiments of the present application, step S103 comprises: If the number of defects exceeds a predetermined number, step S131 is included in which the battery under test is determined to be unacceptable.

[0152] In the present embodiment, if the number of defects exceeds a predetermined number, it indicates that the test battery 300 has many defects, and the test battery 300 is determined to be unacceptable.

[0153] According to some embodiments of the present application, step S103 comprises: If the defect size exceeds a predetermined size, step S132 is included in which the battery under test is determined to be unacceptable.

[0154] In the present embodiment, if the defect size exceeds a predetermined size, it indicates that the defect size of the test battery 300 is large, and the test battery 300 is determined to be unacceptable.

[0155] According to some embodiments of the present application, step S103 comprises: The method includes step S133 of determining that the battery under test passes if the number of defects is equal to or less than a predetermined number and the size of the defects is equal to or less than a predetermined size.

[0156] Although the above steps describe defect detection for each test battery, in actual applications, defect detection can be performed for multiple test batteries throughout the entire process. For defect detection for multiple test batteries, please refer to the explanations of Figures 6 to 9 regarding the detection device mentioned above. Explanations will be omitted in this application.

[0157] In this embodiment, the effectiveness of the detection device is first calibrated before detection begins. Based on the inspection requirements, various sizes and types of defect samples to be detected are defined, and experimental batteries are produced. The experimental batteries are then tested before detection begins. If all defects in the experimental batteries are identified by the algorithm and the batteries are rejected as NG products, the detection device can be proven effective. On the other hand, if any defects in the experimental batteries are not identified by the algorithm and the batteries are not rejected as NG products, the device's detection must be temporarily suspended and the algorithm must be debugged until all defects are identified as NG.

[0158] In the present embodiment, the defect detection image can be subjected to specific marking and identification processing before detection, and artificial intelligence (AI) algorithms can be used to automatically identify and judge defects.

[0159] In the embodiment of the present application, each detection process is fed back to the AI ​​algorithm, and the AI ​​algorithm optimizes defect identification and judgment based on each detection process, thereby improving the accuracy of defect recognition.

[0160] For example, after a defect is recognized, a mark is added to the defective portion, so that the worker can easily check the defect.

[0161] An embodiment of the present application provides a battery detection device, wherein a test battery includes a first corner and a second corner, and the battery detection device includes: an acquisition module configured to acquire a detection image of the test battery, where the detection image includes a first corner detection image and a second corner detection image; a first identification module configured to identify defect information of the test battery based on the detection image; and a second identification module configured to identify a quality detection result of the test battery based on the defect information of the test battery.

[0162] In some embodiments of the present application, the acquisition module includes a first control submodule configured to control the first corner to be located between the first radiation source and the first detector and the second corner to be located between the second radiation source and the second detector; a second control submodule configured to control the radiation emitted from the first radiation source to pass through the first corner of the test cell and be projected onto the first detector; a third control submodule configured to control the radiation emitted from the second radiation source to pass through the second corner of the test cell and be projected onto the second detector; a first identification submodule configured to identify a first corner detection image based on the radiation received by the first detector; and a third identification submodule configured to identify a second corner detection image based on the radiation received by the second detector. 2 The device includes an identifying sub-module and a third identifying sub-module configured to identify a detected image of the test battery based on the first corner detected image and the second corner detected image.

[0163] In some embodiments of the present application, the first identification submodule includes a collection unit configured to collect a plurality of first raw images including the first corner based on radiation received by the first detector, and a processing unit configured to process the plurality of first raw images to obtain a first corner detection image.

[0164] In some embodiments of the present application, the processing unit includes a filter subunit configured to perform a filter process on a plurality of first raw images to obtain a first filtered image, a noise reduction subunit configured to perform a noise reduction process on the first filtered image to obtain a first noise-reduced image, and a cut-out subunit configured to cut out a first detection area in the first noise-reduced image to obtain a first corner detection image, wherein the first detection area is configured to be an area that includes a first corner in the first noise-reduced image.

[0165] In some embodiments of the present application, the first corner is adjacent to the second corner, and the test battery further includes adjacent third and fourth corners, the third corner being adjacent to the first corner and the fourth corner being adjacent to the second corner, and the acquisition module includes a fourth control sub-module configured to control movement of the test battery so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector, a fifth control sub-module configured to control radiation emitted from the first radiation source to pass through the third corner of the test battery and be projected onto the first detector, and a fifth control sub-module configured to control radiation emitted from the second radiation source to be projected onto the first detector. The test device includes a sixth control submodule configured to control the radiation received by the first detector so that it passes through the fourth corner of the test battery and is projected onto the second detector, a fourth identification submodule configured to identify a third corner detection image of the third corner based on the radiation received by the first detector, a fifth identification submodule configured to identify a fourth corner detection image of the fourth corner based on the radiation received by the second detector, and a sixth identification submodule configured to identify a detection image of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, and the fourth corner detection image.

[0166] In some embodiments of the present application, the test battery is positioned on a transport platform, the third corner and the first corner are arranged along a first direction, and the fourth corner and the second corner are arranged in the first direction, and the fourth control submodule is further configured to control movement of the transport platform along the first direction so that the third corner is located between the first radiation source and the first detector, and the fourth corner is located between the second radiation source and the second detector.

[0167] In some embodiments of the present application, the test battery further includes a first surface, the first surface being perpendicular to a thickness direction of the test battery, and the first corner and the second corner both being located on the first surface. The acquisition module further includes a seventh control sub-module configured to control the first surface to be located between a third radiation source and a third detector, an eighth control sub-module configured to control the radiation emitted from the third radiation source to pass through the first surface of the test battery and be projected onto the third detector, a seventh identification sub-module configured to identify a first surface detected image of the first surface based on the radiation received by the third detector, and an eighth identification sub-module configured to identify a detected image of the test battery based on the first corner detected image, the second corner detected image, the third corner detected image, the fourth corner detected image, and the first surface detected image.

[0168] In some embodiments of the present application, the first surface includes a first region and a second region connected to each other, and the eighth control sub-module includes a first control unit configured to control radiation emitted from the third radiation source to pass through at least the first region and be projected onto the third detector, and a second control unit configured to control radiation emitted from the third radiation source to pass through at least the second region and be projected onto the third detector.

[0169] In some embodiments of the present application, the first identification module includes a first identification unit configured to identify the number of defects and / or defect size of the test battery based on the first corner detection image and the second corner detection image, and a second identification unit configured to identify defect information of the test battery based on the number of defects and / or defect size.

[0170] In some embodiments of the present application, the second identification module includes a third identification unit configured to determine that the test battery is unacceptable if the number of defects exceeds a predetermined number.

[0171] In some embodiments of the present application, the second identification module includes a fourth identification unit configured to determine that the test battery is unacceptable if the defect size exceeds a predetermined size.

[0172] Regarding limitations on the battery detection device, reference can be made to the limitations on the battery detection method described above, and further description will be omitted here. Each module in the battery detection device described above can be realized in whole or in part by software, hardware, or a combination thereof. Each module described above is implemented in hardware form as built-in to the processor of the electronic device, or provided independently, or is implemented in software form as stored in the memory of the electronic device, and is configured so that the processor can call and execute operations corresponding to each module.

[0173] An embodiment of the present application provides a method for manufacturing a battery, and FIG. 18 is a flowchart of a method for manufacturing a battery according to some embodiments of the present application. As shown in FIG. 18, the method includes: The method includes a step S301 of detecting the quality of the test battery using the method according to the above embodiment and identifying the quality detection result of the test battery.

[0174] The battery manufacturing method provided by the embodiment of the present application can identify defects in the test battery 300 and determine the quality of the test battery 300 based on the defects in the test battery 300 .

[0175] According to some embodiments of the present application, as shown in FIG. 18, the method may further include: If the quality detection result of the test battery is unacceptable, step S302 is included in which the unacceptable battery is discarded.

[0176] In the embodiment of the present application, the quality of the test battery 300 is identified based on the quality detection result of the test battery 300, and the rejected battery is discarded, improving the stability of the device or equipment to which the battery is applied.

[0177] Illustratively, cells that pass the detection can proceed to the next step.

[0178] An embodiment of the present application provides an electronic device, the electronic device including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores commands executable by the at least one processor, and the execution of the commands by the at least one processor enables the at least one processor to perform the battery detection method described in the above-mentioned embodiment or the battery manufacturing method described in the above-mentioned embodiment.

[0179] An embodiment of the present application provides a battery manufacturing apparatus including the electronic device according to the above-described embodiment.

[0180] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the battery detection method described in the above embodiment or the battery manufacturing method described in the above embodiment is realized.

[0181] An embodiment of the present application provides a computer program product including a computer program, and when the computer program is executed by a processor, the battery detection method described in the above embodiment or the battery manufacturing method described in the above embodiment is realized.

[0182] An embodiment of the present application provides a detection device for detecting a battery, wherein the test battery 300 is a stacked battery, the test battery 300 includes a first surface 5, the first surface 5 is perpendicular to the thickness direction Z of the test battery 300, a first corner 1, a second corner 2, a third corner 3 and a fourth corner 4 are all located on the first surface 5, and the first corner 1 is adjacent to the second corner 2, and the first corner 1 is adjacent to the third corner 3.

[0183] The detection device includes a first radiation source 10, a first detector 11, a second radiation source 20, a second detector 21, a third radiation source 30, a third detector 31, and a transport table 100. The first radiation source 10, the second radiation source 20, and the third radiation source 30 are all located on the same side of the transport table 100. The first radiation source 10, the second radiation source 20, and the third radiation source 30 are all sealed integrated X-ray tubes. The first detector 11, the second detector 21, and the third detector 31 are all flat panel detectors. The size D1 of the radiation source focus of the first radiation source 10 and the size D2 of the radiation source focus of the second radiation source 20 satisfy D1≤10 μm and D2≤10 μm, and the size D3 of the radiation source focus of the third radiation source 30 satisfies 10 μm < D3≤30 μm.

[0184] The first detector 11 faces the exit port of the first radiation source 10, the second detector 21 faces the exit port of the second radiation source 20, and the third detector 31 faces the exit port of the third radiation source 30. A transport table 100 is located between the first radiation source 10 and the first detector 11, the transport table 100 is located between the second radiation source 20 and the second detector 21, and the transport table 100 is located between the third radiation source 30 and the third detector 31, and the transport table 100 is configured to place a test battery on it. Radiation emitted from the first radiation source 10 passes through a first corner 1 of the test battery placed on the transport table 100 and is projected onto the first detector 11, and the first detector 11 is used to identify a first corner detection image of the first corner based on the received radiation. The radiation emitted from the first radiation source 10 passes through a third corner 3 of the test battery placed on the transport platform 100 and is projected onto the first detector 11, which is used to identify a third corner detection image of the third corner 3 based on the received radiation. The radiation emitted from the second radiation source 20 passes through a second corner 2 of the test battery placed on the transport platform 100 and is projected onto the second detector 21, which is used to identify a second corner detection image of the second corner based on the received radiation. The radiation emitted from the second radiation source 20 passes through a fourth corner 4 of the test battery placed on the transport platform 100 and is projected onto the second detector 21, which is used to identify a fourth corner detection image of the fourth corner 4 based on the received radiation. The radiation emitted from the third radiation source 30 passes through the first surface 5 of the test battery placed on the transport table 100 and is projected onto the third detector 31, and the third detector 31 is configured to identify the first surface detection image of the first surface 5 based on the received radiation.

[0185] The detection device further includes a detection unit 200, which is connected to each of the first detector 11, the second detector 21, and the third detector 31. The detection unit 200 is configured to detect defects in the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, the fourth corner detection image, and the first surface detection image.

[0186] The present application further provides a battery detection method, and FIG. 19 is a flowchart of the battery detection method according to some embodiments of the present application. As shown in FIG. 19, the method includes: Step S401: Controlling radiation emitted from a third radiation source so that the radiation passes through a first region on a first surface of the test cell and is projected onto a third detector; Step S402 of identifying a first region detection image based on the radiation received by the third detector; Step S403: Controlling the movement of the carrier so that the radiation emitted from the third radiation source passes through the second region of the first surface of the test battery and is projected onto the third detector; Step S404 of identifying a second region detection image based on the radiation received by the third detector; A step S405 of identifying a first surface detection image of the first surface based on the first area detection image and the second area detection image; a step S406 of controlling the movement of the transport platform so that radiation emitted from the first radiation source passes through a first corner of the test battery and is projected onto the first detector, and radiation emitted from the second radiation source passes through a second corner of the test battery and is projected onto the second detector; Step S407: determining a first corner detection image based on the radiation received by the first detector, and determining a second corner detection image based on the radiation received by the second detector; a step S408 of controlling the movement of the transport platform so that radiation emitted from the first radiation source passes through a third corner of the test battery and is projected onto the first detector, and radiation emitted from the second radiation source passes through a fourth corner of the test battery and is projected onto the second detector; a step S409 of determining a third corner detection image based on the radiation received by the first detector and determining a fourth corner detection image based on the radiation received by the second detector; a step S410 of identifying defect information of the test battery based on the first surface detection image, the first corner detection image, the second corner detection image, the third corner detection image, and the fourth corner detection image; and step S411 of identifying the quality detection result of the test battery based on the defect information of the test battery.

[0187] Finally, it should be noted that the above embodiments are merely for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand the following: Those skilled in the art may still modify the technical solutions described in the above embodiments or substitute some or all of the technical features therein with equivalents, and such modifications or substitutions do not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and all of them should be encompassed by the scope of the claims and the description of the present application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural contradiction. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions encompassed by the claims.

Claims

1. A detection device for detecting a battery, the battery to be tested is a stacked battery, the detection device comprising: a first radiation source (10); a second radiation source (20); a first detector (11) facing the exit port of the first radiation source (10); a second detector (21) facing the exit port of the second radiation source (20); a transport table (100) on which the test battery is placed, which is movable, and whose movement path is configured to pass between the first radiation source (10) and the first detector (11) and between the second radiation source (20) and the second detector (21); a detection unit (200) connected to each of the first detector (11) and the second detector (21) and configured to detect defects in the test battery based on the radiation received by the first detector (11) and the radiation received by the second detector (21).

2. 2. The detection device according to claim 1, wherein a size D1 of a radiation source focus of the first radiation source (10) and a size D2 of a radiation source focus of the second radiation source (20) satisfy D1≦10 μm and / or D2≦10 μm.

3. The detection device further comprises: a third radiation source (30); a third detector (31) facing the exit port of the third radiation source (30); 3. The detection device of claim 1, wherein the movement trajectory of the transport table (100) further passes between the third radiation source (30) and the third detector (31), and the detection unit (200) is further configured to detect defects in the test battery based on radiation received by the third detector (31).

4. 4. The detection device according to claim 3, wherein a size D3 of the radiation source focus of the third radiation source (30) satisfies 10 μm<D3≦30 μm.

5. 5. The detection device according to claim 3, wherein an area of ​​an irradiation surface of the third radiation source (30) on a first surface of the test battery is equal to or greater than half of an area of ​​the first surface, and the first surface is a surface of the test battery facing an exit port of the third radiation source (30).

6. 6. The detection device according to claim 3, wherein the first radiation source (10), the second radiation source (20), and the third radiation source (30) are all located on the same side of the transport table (100).

7. 7. The detection device according to any one of claims 3 to 6, wherein at least one of the first radiation source (10), the second radiation source (20) and the third radiation source (30) is an integrated radiation source.

8. A battery detection method, the detection method detecting a test battery using the detection device according to any one of claims 1 to 7, the test battery including a first corner portion and a second corner portion, the detection method comprising: acquiring a detection image of the test battery, the detection image including a first corner detection image and a second corner detection image; Identifying defect information of the test battery based on the detected image; and identifying a quality detection result of the test battery based on defect information of the test battery.

9. Acquiring a detection image of the test battery includes: controlling the first corner portion to be located between a first radiation source and a first detector, and the second corner portion to be located between a second radiation source and a second detector; Controlling radiation emitted from the first radiation source so that the radiation passes through a first corner of the test battery and is projected onto the first detector; Controlling radiation emitted from the second radiation source so that the radiation passes through a second corner of the test battery and is projected onto the second detector; determining the first corner-detection image based on the radiation received by the first detector; determining the second corner-detection image based on the radiation received by the second detector; The method of claim 8 , further comprising: determining a detected image of the test battery based on the first corner detected image and the second corner detected image.

10. Identifying the first corner detection image based on the radiation received by the first detector includes: collecting a plurality of first raw images including the first corner based on the radiation received by the first detector; and processing the plurality of first raw images to obtain the first corner-detected image.

11. Processing the plurality of first raw images to obtain the first corner-detection image includes: filtering the plurality of first raw images to obtain a first filtered image; performing a noise reduction process on the first filtered image to obtain a first noise-reduced image; 11. The method of claim 10, further comprising: extracting a first detection area from the first noise-reduced image to obtain the first corner-detected image, wherein the first detection area is an area in the first noise-reduced image that includes the first corner.

12. The first corner is adjacent to the second corner, the test battery further includes adjacent third and fourth corners, the third corner is adjacent to the first corner, and the fourth corner is adjacent to the second corner, and acquiring a detection image of the test battery includes: controlling movement of the test battery so that the third corner is located between the first radiation source and the first detector and the fourth corner is located between the second radiation source and the second detector; Controlling radiation emitted from the first radiation source so that the radiation passes through a third corner of the test battery and is projected onto the first detector; Controlling radiation emitted from the second radiation source so that the radiation passes through a fourth corner of the test battery and is projected onto the second detector; Identifying a third corner detection image of the third corner based on the radiation received by the first detector; Identifying a fourth corner detection image of the fourth corner based on the radiation received by the second detector; A method according to any one of claims 9 to 11, wherein a detection image of the test battery is identified based on the first corner detection image, the second corner detection image, the third corner detection image, and the fourth corner detection image.

13. the test battery is placed on a transport platform, the third corner and the first corner are arranged along a first direction, the fourth corner and the second corner are arranged along the first direction, and the movement of the test battery is controlled so that the third corner is located between the first radiation source and the first detector, and the fourth corner is located between the second radiation source and the second detector; 13. The method of claim 12, comprising controlling movement of the transport platform along the first direction such that the third corner is located between the first radiation source and the first detector, and the fourth corner is located between the second radiation source and the second detector.

14. The test battery further includes a first surface, the first surface being perpendicular to a thickness direction of the test battery, and the first corner and the second corner being both located on the first surface, and acquiring a detection image of the test battery includes: controlling the first surface to be located between a third radiation source and a third detector; Controlling radiation emitted from the third radiation source so that the radiation passes through a first surface of the test cell and is projected onto the third detector; determining a first surface detection image of the first surface based on the radiation received by the third detector; The method of claim 13, further comprising identifying a detection image of the test battery based on the first corner detection image, the second corner detection image, the third corner detection image, the fourth corner detection image, and the first surface detection image.

15. the first surface includes a first region and a second region connected to each other, and controlling the radiation emitted from the third radiation source to pass through the first surface of the test cell and project onto the third detector includes: Controlling radiation emitted from the third radiation source to pass through at least the first region and project onto the third detector; and controlling radiation emitted from the third radiation source to pass through at least the second region and project onto the third detector.

16. Identifying defect information of the test battery based on the detected image includes: Identifying the number and / or size of defects in the test battery based on the detected image; and determining defect information of the test battery based on the number of defects and / or the size of the defects.

17. Identifying a quality detection result of the test battery based on defect information of the test battery, 17. The method of claim 16, further comprising: determining that the test battery has failed if the number of defects exceeds a predetermined number.

18. Identifying a quality detection result of the test battery based on defect information of the test battery, 17. The method of claim 16, further comprising determining that the test battery fails if the defect size exceeds a predetermined size.

19. A battery detection device, wherein a test battery includes a first corner portion and a second corner portion, the first corner portion being adjacent to the second corner portion, an acquisition module configured to acquire a detection image of the test battery, the detection image including a first corner detection image and a second corner detection image; a first identification unit configured to identify defect information of the test battery based on the detected image; a second identification unit configured to identify a quality detection result of the test battery based on defect information of the test battery.

20. A method for manufacturing a battery, comprising detecting the quality of the test battery using the method according to any one of claims 8 to 18, and identifying the quality detection result of the test battery.

21. The method of claim 20, further comprising discarding the failed battery if the quality detection result of the tested battery is unacceptable.

22. at least one processor; a memory communicatively coupled to the at least one processor; An electronic device in which the memory stores commands executable by the at least one processor, and when the commands are executed by the at least one processor, the at least one processor is able to perform the battery detection method described in any one of claims 8 to 18 or the battery manufacturing method described in claim 20 or 21.

23. A battery manufacturing device comprising the electronic device according to claim 22.

24. A computer-readable storage medium storing a computer program that, when executed by a processor, realizes the battery detection method of any one of claims 8 to 18 or the battery manufacturing method of claim 20 or 21.

25. A computer program product including a computer program, which, when executed by a processor, realizes the battery detection method according to any one of claims 8 to 18 or the battery manufacturing method according to claim 20 or 21.

Images