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

Abstract

The invention provides a detection device and method for detecting a battery, equipment and a medium, and belongs to the technical field of batteries. The detection device comprises a first radiation source, a first detector, a second radiation source, a second detector, a bearing platform and a detection unit. The bearing platform is used for placing a to-be-detected battery, the bearing platform is movable, the moving track of the bearing platform passes through the space between the first ray source and the first detector, and the moving track of the bearing platform passes through the space between the second ray source and the second detector. The detection unit is connected with the first detector and the second detector. And the detection unit is used for performing defect detection on the to-be-detected battery based on the rays received by the first detector and the rays received by the second detector.

Description

Technical Field

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

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

[0003] Batteries may develop defects during production or use. For stacked batteries, the four corners of the battery are prone to bumps and defects. Some defects may not be observed from the outside of the battery, and the inside of the battery needs to be inspected.

[0004] In the related art, when inspecting batteries, the imaging of the corners of the batteries is easily distorted, resulting in misjudgment, omissions, and incomplete inspection of battery defects. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a battery detection device, method, production method, equipment and medium to improve the problems of misjudgment, omission and incomplete detection of defects in the related technology.

[0006] An embodiment of the first aspect of the present application provides a detection device for detecting batteries, wherein the battery to be tested is a stacked battery, and the detection device includes: a first ray source; a second ray source; a first detector, opposite to an emission port of the first ray source; a second detector, opposite to an emission port of the second ray source; a carrying platform, configured to place the battery to be tested, the carrying platform is movable, and a moving trajectory of the carrying platform passes between the first ray source and the first detector, and a moving trajectory of the carrying platform passes between the second ray source and the second detector; and a detection unit, respectively connected to the first detector and the second detector, the detection unit being configured to perform defect detection on the battery to be tested based on the rays received by the first detector and the rays received by the second detector.

[0007] In the technical solution of the embodiment of the present application, the first ray source and the first detector cooperate with each other to detect the first corner of the battery to be tested, and the second ray source and the second detector cooperate with each other to detect the second corner of the battery to be tested, so that when the battery to be tested is subjected to defect detection, the angle between the ray and the surface where the first corner and the second corner of the battery to be tested are located is as close to 90° as possible, thereby reducing the distortion in the first angle detection image and the second angle detection image, making the first angle detection image and the actual situation of the first corner of the battery to be tested closer, and the second angle detection image and the actual situation of the second corner of the battery to be tested closer. The detection unit performs defect detection on the corners of the battery to be tested through the first angle detection image and the second angle detection image, so that the defect detection inside the battery to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0008] In some embodiments, the size D1 of the ray source focus of the first ray source and the size D2 of the ray source focus of the second ray source satisfy: D1≤10μm and / or D2≤10μm. Since the smaller the ray source focus, the smaller the geometric unsharpness after the ray penetrates the object, and the higher the resolution. In the embodiments of the present application, the size of the ray source focus of at least one of the first ray source and the second ray source is limited to less than or equal to 10 microns, so that the imaging effect of at least one angle will be improved, thereby further reducing the influence of distortion on the defect detection of the battery to be tested.

[0009] In some embodiments, the detection device further includes: a third ray source; a third detector, which is opposite to the emission port of the third ray source; wherein the moving track of the carrying platform also passes between the third ray source and the third detector, and the detection unit is further configured to perform defect detection on the battery to be tested based on the rays received by the third detector. The third ray source and the third detector are arranged to cooperate with each other to perform defect detection on the first surface of the battery to be tested, so as to realize the detection of the entire battery to be tested, so that the defect detection of the battery to be tested is more comprehensive.

[0010] In some embodiments, the size D3 of the radiation source focus of the third radiation source satisfies: 10μm<D3≤30μm. The distortion of the middle part of the battery to be tested is small, and a too small radiation source focus is not required for imaging. When the size of the radiation source focus of the third radiation source is less than or equal to 10 microns, although the imaging quality is good, the detection time is long, which increases the detection time and reduces the efficiency; when the size of the radiation source focus of the third radiation source is greater than 30 microns, the imaging quality is poor, which will reduce the accuracy of the detection. Setting the size D3 of the radiation source focus of the third radiation source to 10μm<D3≤30μm can improve the imaging quality, shorten the detection time, and improve work efficiency.

[0011] In some embodiments, the area of ​​the radiation surface of the third ray source on the first surface of the battery to be tested is greater than or equal to half of the area of ​​the first surface, and the first surface is the surface of the battery to be tested that is opposite to the emission port of the third ray source. The area of ​​the radiation surface of the third ray source on the first surface is greater than or equal to half of the area of ​​the first surface, and the detection of the first surface can be achieved through two detections, and the detection of the first surface in the two-side detection is more comprehensive.

[0012] In some embodiments, the first ray source, the second ray source and the third ray source are all located on the same side of the carrying platform, so as to facilitate the arrangement of the ray sources and the detectors.

[0013] 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. The integrated radiation source has a low rework rate, high stability, small size, and simple later maintenance. The first radiation source, the second radiation source, or the third radiation source is set as an integrated radiation source to improve the reliability of the detection device.

[0014] The second aspect of the present application provides a battery detection method, the detection method uses the detection device of any one of the above embodiments to detect the battery to be tested, the battery to be tested includes a first corner and a second corner, and the detection method includes: obtaining a detection image of the battery to be tested, the detection image includes a first corner detection image and a second corner detection image; based on the detection image, determining the defect information of the battery to be tested; based on the defect information of the battery to be tested, determining the quality detection result of the battery to be tested. The first corner detection image and the second corner detection image of the battery to be tested are obtained, and the defect information of the battery to be tested is determined by analyzing the first corner detection image and the second corner detection image, so that the distortion in the first corner detection image and the second corner detection image can be reduced, so that the first corner detection image is closer to the actual situation of the first corner of the battery to be tested, and the second corner detection image is closer to the actual situation of the second corner of the battery to be tested, so that the defect detection inside the battery to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0015] In some embodiments, obtaining a detection image of a battery to be tested includes: controlling a first angle to be located between a first ray source and a first detector, and a second angle to be located between the second ray source and the second detector; controlling the rays emitted by the first ray source to be projected onto the first detector through the first corner of the battery to be tested; controlling the rays emitted by the second ray source to be projected onto the second detector through the second corner of the battery to be tested; determining a first angular position detection image based on the rays received by the first detector; determining a second angular position detection image based on the rays received by the second detector; and determining a detection image of the battery to be tested based on the first angular position detection image and the second angular position detection image. By controlling the first angle to be located between the first ray source and the first detector, and the second angle to be located between the second ray source and the second detector, when performing defect detection on the battery to be tested, the angle between the ray and the surface where the first corner and the second corner of the battery to be tested are located is as close to 90° as possible, thereby reducing the distortion in the first angle detection image and the second angle detection image, making the first angle detection image closer to the actual situation of the first corner of the battery to be tested, and the second angle detection image closer to the actual situation of the second corner of the battery to be tested. Defect detection is performed on the corners of the battery to be tested through the first angle detection image and the second angle detection image, so that the defect detection inside the battery to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0016] In some embodiments, determining a first angular position detection image based on rays received by the first detector includes: collecting multiple first original images including the first angle based on the rays received by the first detector; and processing the multiple first original images to obtain a first angular position detection image.

[0017] In some embodiments, processing multiple first original images to obtain a first corner detection image includes: filtering multiple first original images to obtain a first filtered image; performing noise reduction on the first filtered image to obtain a first noise reduction image; intercepting a first detection area in the first noise reduction image to obtain a first corner detection image, where the first detection area is an area in the first noise reduction image that includes the first corner. Collect multiple first original images, process the multiple first original images, if one of the first original images has an error, the other first original images are still correct, and the influence of the error on the detection result can also be reduced. In an embodiment of the present application, filtering can remove irrelevant information in multiple first original images, and can improve the signal-to-noise ratio of the first original image. The first noise reduction image is obtained by performing noise reduction on the first filtered image, and random noise such as quantum noise, aliasing noise, and electronic noise in the first filtered image can be removed, thereby greatly improving the signal-to-noise ratio of the first filtered image. The first original image collected by the first ray source and the first detector includes not only the first corner but also other areas. In the embodiment of the present application, the area with the first corner is cut out. On the one hand, it can reduce subsequent calculations, and on the other hand, it can reduce the impact of errors in other areas on the first corner defect detection.

[0018] In some embodiments, the first angle is adjacent to the second angle, and the battery to be tested further includes adjacent third and fourth angles, the third angle is adjacent to the first angle, and the fourth angle is adjacent to the second angle. Acquiring the detection image of the battery to be tested includes: controlling the movement of the battery to be tested so that the third angle is located between the first ray source and the first detector, and the fourth angle is located between the second ray source and the second detector; controlling the rays emitted by the first ray source to be projected to the first detector through the third angle of the battery to be tested; controlling the rays emitted by the second ray source to be projected to the second detector through the fourth angle of the battery to be tested; determining the third angle detection image of the third angle based on the rays received by the first detector; determining the fourth angle detection image of the fourth angle based on the rays received by the second detector; determining the defect information of the battery to be tested based on the first angle detection image, the second angle detection image, the third angle detection image, and the fourth angle detection image. The above steps can also realize the detection of the third and fourth angles of the battery to be tested, making the detection of the battery to be tested more comprehensive, and at the same time making the third angle detection image closer to the actual situation of the third angle of the battery to be tested, and the fourth angle detection image closer to the actual situation of the fourth angle of the battery to be tested, reducing the problems of misjudgment, omission and incompleteness of defect detection.

[0019] In some embodiments, the battery to be tested is located on a carrying platform, the third angle and the first angle are arranged along the first direction, the fourth angle and the second angle are arranged along the first direction, and the battery to be tested is controlled to move so that the third angle is between the first ray source and the first detector, and the fourth angle is between the second ray source and the second detector, including: controlling the carrying platform to move along the first direction so that the third angle is between the first ray source and the first detector, and the fourth angle is between the second ray source and the second detector. Compared with controlling the movement of the battery to be tested, controlling the movement of the carrying platform is simpler and does not require changing the positional relationship between the battery to be tested and the carrying platform, making the battery to be tested more stable.

[0020] In some embodiments, the battery to be tested also includes a first surface, the first surface is perpendicular to the thickness direction of the battery to be tested, the first angle and the second angle are both located on the first surface, and obtaining the detection image of the battery to be tested includes: controlling the first surface to be located between the third ray source and the third detector; controlling the rays emitted by the third ray source to be projected to the third detector through the first surface of the battery to be tested; determining the first surface detection image of the first surface based on the rays received by the third detector; determining the defect information of the battery to be tested based on the first angle detection image, the second angle detection image, the third angle detection image, the fourth angle detection image and the first surface detection image. Through the above steps, the battery to be tested also includes the first surface, so as to achieve a more comprehensive detection of the battery to be tested.

[0021] In some embodiments, the first surface includes a first area and a second area connected to each other, and controlling the radiation emitted by the third radiation source to be projected to the third detector through the first surface of the battery to be tested includes: controlling the radiation emitted by the third radiation source to be projected to the third detector through at least the first area; controlling the radiation emitted by the third radiation source to be projected to the third detector through at least the second area. By detecting the first surface twice, omissions in the detection of the first surface can be reduced, thereby making the defect detection of the battery to be tested more comprehensive.

[0022] In some embodiments, based on the detection image, determining the defect information of the battery to be tested includes: determining the number of defects and / or defect size of the battery to be tested based on the detection image; determining the defect information of the battery to be tested based on the number of defects and / or defect size. The number of defects and defect size are both standards for measuring defects in the battery to be tested. The number of defects is the sum of the number of all defects in the battery to be tested, and the defect size is the size of each defect alone.

[0023] In some embodiments, determining the quality inspection result of the battery to be tested based on the defect information of the battery to be tested includes: in response to the number of defects being greater than a preset number, determining that the battery to be tested is unqualified. When the number of defects is greater than the preset number, it means that there are many defects in the battery to be tested, and the battery to be tested is determined to be unqualified.

[0024] In some embodiments, determining the quality inspection result of the battery to be tested based on the defect information of the battery to be tested includes: in response to the defect size being larger than a preset size, determining that the battery to be tested is unqualified. When the defect size is larger than the preset size, it means that the defect size in the battery to be tested is large, and the battery to be tested is determined to be unqualified.

[0025] An embodiment of the third aspect of the present application provides a battery detection device, wherein the battery to be tested includes a first corner and a second corner, and the first corner is adjacent to the second corner. The battery detection device includes: an acquisition module, configured to acquire a detection image of the battery to be tested, the detection image including a first angular detection image and a second angular detection image; a first determination module, configured to determine defect information of the battery to be tested based on the detection image; and a second determination module, configured to determine a quality detection result of the battery to be tested based on the defect information of the battery to be tested.

[0026] The fourth aspect of the present application provides a method for producing a battery, the method comprising: using any of the methods in the above embodiments to detect the quality of the battery to be tested, so as to determine the quality test result of the battery to be tested. The method for producing a battery provided in the embodiment of the present application can determine the defects of the battery to be tested, and can determine the quality of the battery to be tested based on the defects of the battery to be tested.

[0027] In some embodiments, the method further includes: in response to the quality inspection result of the battery to be tested being unqualified, rejecting the unqualified battery. The quality of the battery to be tested can be determined based on the quality inspection result of the battery to be tested, and the unqualified battery can be rejected to improve the stability of the device or equipment using the battery.

[0028] An embodiment of the fifth aspect of the present application provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery detection method of any one of the above embodiments or the battery production method of any one of the above embodiments.

[0029] An embodiment of the sixth aspect of the present application provides a battery production device, including the electronic device in the above embodiment.

[0030] An embodiment of the seventh aspect of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the battery detection method of any one of the above embodiments or the battery production method of any one of the above embodiments.

[0031] An embodiment of the eighth aspect of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the battery detection method of any one of the above embodiments or the battery production method of any one of the above embodiments.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0034] Figure 1 This is a schematic diagram of the structure of a detection device according to some embodiments of the present application;

[0035] Figure 2 A block diagram of a detection device according to some embodiments of the present application;

[0036] Figure 3 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0037] Figure 4 Schematic diagram of a first surface and a radiation surface of some embodiments of the present application;

[0038] Figure 5 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0039] Figure 6 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0040] Figure 7 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0041] Figure 8 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0042] Fig. 9 It is a schematic diagram of the structure of the detection device of some other embodiments of the present application;

[0043] Fig.10 A flowchart of a battery detection method according to some embodiments of the present application;

[0044] Fig.11This is a flowchart of step S101 in some embodiments of the present application;

[0045] Fig.12 This is a flowchart of step S114 in some embodiments of the present application;

[0046] Fig.13 This is a flowchart of step S1142 of some embodiments of the present application;

[0047] Fig.14 A flowchart of step S101 of some other embodiments of the present application;

[0048] Fig.15 A flowchart of step S101 of some other embodiments of the present application;

[0049] Fig.16 This is a flowchart of step S1114 in some embodiments of the present application;

[0050] Fig.17 This is a flowchart of step S102 in some embodiments of the present application;

[0051] Fig.18 A flowchart of a method for producing a battery according to some embodiments of the present application;

[0052] Fig.19 This is a flow chart of a battery detection method according to some embodiments of the present application.

[0053] Description of reference numerals:

[0054] 1. First angle; 2. Second angle; 3. Third angle; 4. Fourth angle; 5. First surface; 51. First area; 52. Second area; 10. First ray source; 11. First detector; 20. Second ray source; 21. Second detector; 30. Third ray source; 31. Third detector; 32. Radiation surface; 100. Carrying platform; 200. Detection unit; 300. Battery to be tested; 301. First battery to be tested; 302. Second battery to be tested. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0064] During the production and use of batteries, defects may occur. For example, during the production of batteries, defects such as wrinkles, folds, or breaks may occur in the pole piece; during the use of batteries, the battery may be bumped, causing the pole piece to break. These defects cannot be observed from the outside of the battery, and the inside of the battery needs to be inspected.

[0065] The rays emitted by the ray source pass through the battery and are detected by the detector, forming a corresponding detection image. When the rays emitted by the ray source are perpendicular to the surface of the battery detection, the actual length of the ray passing through the battery is equal to the thickness of the battery, and the detection image is relatively accurate. When the angle between the ray emitted by the ray source and the surface of the battery detection is less than 90°, the actual length of the ray passing through the battery is greater than the thickness of the battery. At this time, the detection image will have a certain degree of distortion. The smaller the angle between the ray and the surface of the battery detection, the greater the distortion.

[0066] For stacked batteries, the overall shape is a rectangular parallelepiped, and the corners of the rectangular parallelepiped are easily bumped. The battery after the bump may not have defects from the outside, but the internal pole piece of the battery may be broken due to the bump of the battery, affecting the reliability of the battery. In the related art, when the battery is tested, the radiation source corresponds to the middle of the battery. Since the corner of the battery is relatively outside, the angle between the radiation emitted by the radiation source and the surface where the corner of the battery is located is small, resulting in a large distortion of the test image. When analyzing the test image, there is a certain difference between the test image and the actual situation of the battery, resulting in misjudgment, omission, and incomplete detection of battery defects.

[0067] The embodiment of the present application provides a detection device for detecting a battery, the detection device includes a first ray source, a first detector, a second ray source, a second detector, a carrying platform and a detection unit. The first detector is opposite to the emission port of the first ray source, and the second detector is opposite to the emission port of the second ray source. The carrying platform is used to place the battery to be tested, the carrying platform is configured to place the battery to be tested, the carrying platform is movable, the moving track of the carrying platform passes between the first ray source and the first detector, and the moving track of the carrying platform passes between the second ray source and the second detector. The detection unit is connected to the first detector and the second detector, and the detection unit is used to perform defect detection on the battery to be tested by the rays received by the first detector and the rays received by the second detector. The detection device provided in the embodiment of the present application can detect the corners of the battery to be tested, so that the first ray source and the second ray source are respectively opposite to the first corner and the second corner of the battery to be tested, so that during the detection, the distortion of the first angle detection image and the second angle detection image can be reduced, the accuracy of the detection of the inside of the battery to be tested is improved, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0068] The detection device for detecting batteries disclosed in the embodiment of the present application can detect batteries that have just been produced, and can also detect batteries that have been used for a period of time, thereby improving the accuracy of internal detection of batteries and reducing the problems of misjudgment, omission and incomplete defect detection.

[0069] The present application provides a detection device for detecting a battery. Figure 1 This is a schematic diagram of the structure of the detection device of some embodiments of the present application. For the convenience of explanation, Figure 1 The battery 300 to be tested is also shown in the figure, wherein the battery 300 to be tested is a laminated battery, and the detection device includes a first ray source 10, a first detector 11, a second ray source 20, a second detector 21 and a carrying platform 100. The first detector 11 is opposite to the emission port of the first ray source 10, and the second detector 21 is opposite to the emission port of the second ray source 20. The carrying platform 100 is configured to place the battery 300 to be tested, and the carrying platform 100 is movable, and the moving track of the carrying platform 100 passes between the first ray source 10 and the first detector 11, and the moving track of the carrying platform 100 passes between the second ray source 20 and the second detector 21.

[0070] Figure 2 This is a block diagram of a detection device according to some embodiments of the present application. Figure 2 The detection device further includes a detection unit 200, which is connected to the first detector 11 and the second detector 21 respectively. The detection unit 200 is configured to perform defect detection on the battery 300 to be tested based on the rays received by the first detector 11 and the rays received by the second detector 21.

[0071] In the embodiment of the present application, the rays emitted by the first ray source 10 and the second ray source 20 are all penetrating, and the materials of different thicknesses have different attenuation degrees for the rays, so that the first detector 11 and the second detector 21 detect different amounts of rays. There is a layer of photoluminescent material inside the detector. After receiving the rays, the photosensitive material emits light, and the light signal is transmitted to the photoelectric converter to form an electrical signal, and then a digital signal is output through the internal electrical signal transmission circuit, representing an image with light and dark contrast on the image. After the rays pass through the detected object, there will be a certain attenuation. The more rays that pass through, the more luminous signals of the photosensitive material, and the brighter the area is on the final image. On the contrary, the fewer rays that pass through, the darker the area is on the image.

[0072] See also Figure 1 , the battery to be tested 300 includes a first corner 1 and a second corner 2. In an embodiment of the present application, the ray emitted by the first ray source 10 is projected to the first detector 11 through the first corner 1 of the battery to be tested 300 placed on the carrying platform 100, and the first detector 11 is used to determine a first angular position detection image of the first corner based on the received ray, and the ray emitted by the second ray source 20 is projected to the second detector 21 through the second corner 2 of the battery to be tested 300 placed on the carrying platform 100, and the second detector 21 is used to determine a second angular position detection image of the second corner based on the received ray, that is, the detection unit 200 is configured to perform defect detection on the battery to be tested 300 based on the first angular position detection image and the second angular position detection image.

[0073] In an embodiment of the present application, the first detector 11 is opposite to the exit port of the first ray source 10. When the first corner 1 of the battery 300 to be tested moves between the first detector 11 and the first ray source 10, the rays emitted by the first ray source 10 pass through the battery 300 to be tested and are detected by the first detector 11, thereby displaying an image of the first corner 1 of the battery 300 to be tested and obtaining a first angle detection image.

[0074] In an embodiment of the present application, the second detector 21 is opposite to the exit port of the second ray source 20. When the second corner 2 of the battery 300 to be tested moves between the second detector 21 and the second ray source 20, the rays emitted by the second ray source 20 pass through the battery 300 to be tested and are detected by the second detector 21, thereby displaying an image of the second corner 2 of the battery 300 to be tested and obtaining a second angular detection image.

[0075] The shape of the laminated battery is similar to a cuboid, which has eight corners. The battery 300 to be tested has two large faces arranged opposite to each other, and four side faces connecting the two large faces. In one implementation 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.

[0076] Exemplarily, when using the detection device to detect the battery 300 to be tested, the battery 300 to be tested can be placed on the carrying platform 100, and the carrying platform 100 is moved so that the large surface (for example, the first surface 5) of the battery 300 to be tested is in contact with the carrying surface of the carrying platform 100, that is, the thickness direction Z of the battery 300 to be tested is perpendicular to the carrying surface. At this time, the first angle 1 and the second angle 2 can be two corners on the large surface of the battery 300 to be tested facing the radiation source.

[0077] The battery 300 to be tested also includes a third corner 3 and a fourth corner 4, wherein the third corner 3 and the fourth corner 4 are located on the same surface of the battery 300 to be tested as the first corner 1 and the second corner 2. After the device to be tested detects the first corner 1 and the second corner 2 of the battery 300 to be tested, the battery 300 to be tested or the detection device can be moved so that the first ray source 10 is opposite to the third corner 3 and the second ray source 20 is opposite to the fourth corner 4, and the third corner 3 and the fourth corner 4 can be detected. Since the ray is penetrating, it will pass through the corresponding corner during the detection, that is, each corner of the battery 300 to be tested is detected by the detection device.

[0078] In one implementation of the present application, the first ray source 10 and the second ray source 20 may be ray sources of the same ray, for example, the first ray source 10 and the second ray source 20 are both X-ray sources, or the first ray source 10 and the second ray source 20 are both α-ray sources, or the first ray source 10 and the second ray source 20 are both β-ray sources, or the first ray source 10 and the second ray source 20 are both γ-ray sources.

[0079] In another implementation of the present application, the first ray source 10 and the second ray source 20 may be ray sources of different rays, for example, one of the first ray source 10 and the second ray source 20 may be an X-ray source, and the other of the first ray source 10 and the second ray source 20 may be an α-ray source; or one of the first ray source 10 and the second ray source 20 may be an α-ray source, and the other of the first ray source 10 and the second ray source 20 may be a β-ray source, or other combinations, which are not limited to the embodiments of the present application.

[0080] In an implementation 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 are both flat panel detectors, or the first detector 11 and the second detector 21 are both linear array detectors.

[0081] Exemplarily, the detector uses a detector made of cesium iodide photosensitive material.

[0082] In another implementation 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.

[0083] Exemplarily, the linear array detector may include a time delay integration (TDI) detector.

[0084] In an embodiment of the present application, the carrying platform 100 may be a conveyor belt, and the battery to be tested 300 may be placed on the conveyor belt. Alternatively, the carrying platform 100 may be a circular guide rail, and the battery to be tested 300 may be placed on the circular guide rail. When the conveyor belt or the circular guide rail moves, the battery to be tested 300 located on the conveyor belt or the circular guide rail is driven to move, so that continuous detection can be achieved and detection efficiency can be improved.

[0085] In the embodiment of the present application, the detection unit 200 and the first detector 11 , and the detection unit 200 and the second detector 21 may be connected by wire or by wireless.

[0086] In an embodiment of the present application, the first ray source 10 and the first detector 11 cooperate with each other to detect the first corner 1 of the battery 300 to be tested, and the second ray source 20 and the second detector 21 cooperate with each other to detect the second corner 2 of the battery 300 to be tested, so that when the battery 300 to be tested is tested for defects, the angle between the ray and the surface where the first corner 1 and the second corner 2 of the battery 300 to be tested are located is as close to 90° as possible, thereby reducing the distortion in the first angle detection image and the second angle detection image, making the first angle detection image and the actual situation of the first corner 1 of the battery 300 to be tested closer, and the second angle detection image and the actual situation of the second corner 2 of the battery 300 to be tested closer. The detection unit performs defect detection on the corners of the battery 300 to be tested through the first angle detection image and the second angle detection image, so that the defect detection inside the battery 300 to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0087] In the related art, in the middle area of ​​the battery 300 to be tested, the ray enters from one of the large faces of the battery 300 to be tested and will be emitted from another large face of the battery 300 to be tested. Near the corner of the battery 300 to be tested, since the angle between the ray and the large face of the battery 300 to be tested is small, the ray enters from the large face of the battery 300 to be tested and may be emitted from the side of the battery 300 to be tested, which will make the distortion at the corner of the battery 300 to be tested more obvious. In the embodiment of the present application, since the first ray source 10 and the second ray source 20 are respectively opposite to the first corner and the second corner of the battery 300 to be tested, the angle between the ray and the large face of the battery 300 to be tested is closer to 90° near the first corner and the second corner of the battery 300 to be tested, which can reduce the situation where the ray enters from the large face of the battery 300 to be tested and is emitted from the side of the battery 300 to be tested, and further reduce the distortion of the first angle detection image and the second angle detection image.

[0088] In one implementation of the present application, the first angle 1, the second angle 2, the third angle 3 and the fourth angle 4 are all located on the first surface 5. During the detection process, the detection device and the position of the battery 300 to be tested can be moved so that the center line of the ray emitted by the first ray source 10 passes through the vertex of the first angle 1 and is perpendicular to the first surface 5. At the same time, the center line of the ray emitted by the second ray source 20 passes through the vertex of the second angle 2 and is perpendicular to the first surface 5. This can further reduce the impact of distortion.

[0089] In an embodiment of the present application, when placing the first ray source 10 and the second ray source 20 during the detection process, the first ray source 10 can correspond to the position of the first corner 1 of the battery 300 to be tested, and the second ray source 20 can correspond to the position of the second corner 2 of the battery 300 to be tested. In this way, the first corner 1 and the second corner can be detected at the same time, and the detection efficiency is higher.

[0090] According to some embodiments of the present application, a size D1 of the radiation source focus of the first radiation source 10 and a size D2 of the radiation source focus of the second radiation source 20 satisfy: D1 ≤ 10 μm and / or D2 ≤ 10 μm.

[0091] Exemplarily, the size of the focus of the ray source may be the diameter of the focus of the ray source.

[0092] Exemplarily, the size D1 of the radiation source focus of the first radiation source 10 is ≤10 μm; or the size D2 of the radiation source focus of the second radiation source 20 is ≤10 μm; or the size D1 of the radiation source focus of the first radiation source 10 is ≤10 μm, and the size D2 of the radiation source focus of the second radiation source 20 is ≤10 μm.

[0093] In the embodiment of the present application, the electron lens focuses the electron beam to a point on the target as the radiation source focus.

[0094] Since the smaller the focus of the radiation source, the smaller the geometric blur after the radiation penetrates the object, the higher the resolution. In the embodiment of the present application, the size of the focus of at least one of the first radiation source 10 and the second radiation source 20 is limited to less than or equal to 10 microns, so that the imaging effect of at least one angle is improved, thereby further reducing the influence of distortion on the defect detection of the battery 300 to be tested.

[0095] According to some embodiments of the present application, Figure 3 Schematic diagram of the structure of the detection device of some other embodiments of the present application. For the convenience of explanation, Figure 3 The battery 300 to be tested is also shown in FIG. Figure 3 The battery 300 to be tested further includes a first surface 5, the first surface 5 is perpendicular to the thickness direction Z of the battery 300 to be tested, and the first angle 1 and the second angle 2 are both located on the first surface 5. The detection device further includes a third ray source 30 and a third detector 31, and the third detector 31 is opposite to the emission port of the third ray source 30. The moving track of the carrying platform 100 also passes between the third ray source 30 and the third detector 31. The detection unit 200 is also configured to perform defect detection on the battery to be tested based on the rays received by the third detector 31.

[0096] In an embodiment of the present application, the first surface 5 is the large surface of the battery 300 to be tested, and the exit port of the third ray source 30 is opposite to the third detector 31. When the first surface 5 of the battery 300 to be tested moves between the third detector 31 and the third ray source 30, the rays emitted by the third ray source 30 pass through the battery 300 to be tested and are detected by the third detector 31, thereby displaying an image of the first surface 5 of the battery 300 to be tested.

[0097] The rays emitted by the third ray source 30 are projected to the third detector 31 through the first surface 5 of the battery 300 to be tested placed on the supporting platform 100, and the third detector 31 is used to determine the first surface detection image of the first surface 5 based on the received rays. The detection unit 200 can perform defect detection on the battery 300 to be tested based on the first surface detection image.

[0098] In an embodiment of the present application, the type of the third ray source 30 may be the same as the type of one of the first ray source 10 and the second ray source 20; or the type of the third ray source 30 may be the same as the type of both the first ray source 10 and the second ray source 20; or the type of the third ray source 30 may be different from the type of both the first ray source 10 and the second ray source 20.

[0099] Exemplarily, the third ray source 30 may be one of an X-ray source, an α-ray source, a β-ray source, and a γ-ray source.

[0100] In the embodiment of the present application, a third ray source 30 and a third detector 31 are provided to cooperate with each other to perform defect detection on the first surface 5 of the battery 300 to be tested, thereby realizing detection of the entire battery 300 to be tested, making the defect detection of the battery 300 to be tested more comprehensive.

[0101] In one implementation of the present application, during the detection process, the detection device and the position of the battery to be tested 300 can be moved so that the center line of the ray emitted by the third ray 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, which can further reduce the influence of distortion. Exemplarily, the center line of the ray emitted by the third ray source 30 passes through the midpoint of the side where the first corner 1 and the second corner 2 are located.

[0102] According to some embodiments of the present application, a size D3 of the radiation source focus of the third radiation source 30 satisfies: 10 μm<D3≤30 μm.

[0103] Exemplarily, the size D3 of the radiation source focus of the third radiation source 30 is 20 μm.

[0104] In the embodiment of the present application, the distortion of the middle part of the battery 300 to be tested is small, and a too small ray source focus is not required for imaging. When the size of the ray source focus of the third ray source 30 is less than or equal to 10 microns, although the imaging quality is good, the detection time is long, which increases the detection time and reduces the efficiency; when the size of the ray source focus of the third ray source 30 is greater than 30 microns, the imaging quality is poor, which will reduce the accuracy of the detection. Setting the size of the ray source focus of the third ray source 30 to be greater than 10 microns and less than or equal to 30 microns can improve the imaging quality, shorten the detection time, and improve work efficiency.

[0105] According to some embodiments of the present application, the radiation surface area of ​​the third ray source 30 on the first surface 5 of the battery 300 to be tested is greater than or equal to half the area of ​​the first surface 5 , and the first surface 5 is the surface of the battery 300 to be tested opposite to the emission port of the third ray source 30 .

[0106] In the embodiment of the present application, the first surface 5 may be a large surface of the battery 300 to be tested.

[0107] If the rays emitted by the ray source are completely projected onto the object to be detected, the radiation surface of the ray source on the object to be detected is generally circular. Figure 4 Schematic diagram of the first surface and the radiation surface of some embodiments of the present application. Figure 4The first surface 5 includes a first area 51 and a second area 52, and the areas of the first area 51 and the second area 52 are equal. The radiation surface 32 of the third ray source 30 on the first surface 5 includes at least one of the first area 51 and the second area 52. The two radiation surfaces 32 may overlap.

[0108] exist Figure 3 In the detection device shown, the first radiation source 10, the second radiation source 20 and the third radiation source 30 are placed close to each other, and the third radiation source 30 is located between the first radiation source 10 and the second radiation source 20. During the same detection, the first radiation source 10, the second radiation source 20 and the third radiation source 30 can detect the same battery 300 to be tested. Figure 3 In the embodiment, the third ray source 30, the first ray source 10 and the second ray source 20 are in a straight line, so that by moving the detection device and the position of the battery 300 to be tested, during the first detection, the center line of the ray emitted by the first ray source 10 passes through the vertex of the first corner 1 and is perpendicular to the first surface 5; at the same time, the center line of the ray emitted by the second ray source 20 passes through the vertex of the second corner 2 and is perpendicular to the first surface 5; at the same time, the center line of the ray emitted by the third ray 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 ray emitted by the first ray source 10 passes through the vertex of the third corner 3 and is perpendicular to the first surface 5; at the same time, the center line of the ray emitted by the second ray source 20 passes through the vertex of the fourth corner 4 and is perpendicular to the first surface 5; at the same time, the center line of the ray emitted by the third ray source 30 passes through the midpoint of the side where the third corner 3 and the fourth corner 4 are located.

[0109] In other implementations, the third ray source 30 , the first ray source 10 , and the second ray source 20 may not be in a straight line.

[0110] Figure 5 Schematic diagram of the structure of the detection device of other embodiments of the present application. Figure 3 and Figure 5 The difference is that the battery 300 to be tested moves a certain distance along the first direction X. Figure 3 and Figure 5 The positional relationship of the detection device shown in FIG. Figure 3 and Figure 5 In the embodiment, the first ray source 10, the second ray source 20 and the third ray source 30 are arranged along the line direction Y between the first angle 1 and the second angle 2. In some embodiments of the present application, the first direction X, the line direction Y between the first angle 1 and the second angle 2, and the thickness direction Z are perpendicular to each other.

[0111] exist Figure 3 and Figure 5The detection of a battery 300 to be tested can be divided into two steps. First, refer to Figure 3 The first ray source 10 and the first detector 11 detect the first corner 1 of the battery 300 to be tested, the second ray source 20 and the second detector 21 detect the second corner 2 of the battery 300 to be tested, and the third ray source 30 and the third detector 31 detect the first area 51 of the first surface 5 of the battery 300 to be tested; then the battery 300 to be tested is moved along the first direction X, see Figure 5 , so that the third ray source 30 and the third detector 31 detect the second area 52 of the first surface 5 of the battery 300 to be tested, the first ray source 10 and the first detector 11 detect the third corner 3 of the battery 300 to be tested, and the second ray source 20 and the second detector 21 detect the fourth corner 4 of the battery 300 to be tested, and the test of one battery 300 to be tested is completed. Then, the above steps can be used to implement the test of other batteries to be tested.

[0112] In the embodiments of the present application, Figure 5 Relative to Figure 3 , the distance that the battery 300 to be tested moves along the first direction X is equal to the distance between the first corner 1 and the third corner 3.

[0113] Figures 6 to 9 Schematic diagram of the structure of the detection device of some other embodiments of the present application. For the convenience of explanation, Figures 6 to 9 300 is also shown in FIG. Figures 6 to 9 , the first ray source 10 and the second ray source 20 are placed close to each other, and the third ray source 30 is placed far from the first ray source 10 and the second ray source 20. Figures 6 to 9 In the embodiment, the third ray source 30 is located on the right side of the first ray source 10, and the third ray source 30 is located on the right side of the second ray source 20. In other implementations, the third ray source 30 may be located on the left side of the first ray source 10, and the third ray source 30 is located on the left side of the second ray source 20. The moving track of the carrying platform 100 passes between the first ray source 10 and the first detector 11, between the second ray source 20 and the second detector 21, and between the third ray source 30 and the third detector 31.

[0114] by Figures 6 to 9 The positional relationship of the detection device shown in FIG. 1 is explained, wherein the battery to be tested 300 includes a first battery to be tested 301 and a second battery to be tested 302. Along the moving direction of the battery to be tested 300, the second battery to be tested 302 is located downstream of the first battery to be tested 301. During the detection, first, refer to Figure 6 , the third ray source 30 and the third detector 31 detect the first area 51 of the first surface 5 of the first battery to be tested 301; then the carrying platform 100 is controlled to move along the first direction X, see Figure 7, so that the third ray source 30 and the third detector 31 detect the second area 52 of the first surface 5 of the first battery to be tested 301; then control the carrying platform 100 to move along the first direction X, see Figure 8 , so that the first ray source 10 and the first detector 11 detect the first corner 1 of the first battery 301 to be tested, the second ray source 20 and the second detector 21 detect the second corner 2 of the first battery 301 to be tested, and at this time, the first area 51 of the first surface 5 of the second battery 302 to be tested moves to between the third ray source 30 and the third detector 31, and the third ray source 30 and the third detector 31 detect the first area 51 of the first surface 5 of the second battery 302 to be tested; then control the carrying platform 100 to move along the first direction X again, see Fig. 9 , so that the first ray source 10 and the first detector 11 detect the third corner 3 of the first battery 301 to be tested, and the second ray source 20 and the second detector 21 detect the fourth corner 4 of the first battery 301 to be tested; the third ray source 30 and the third detector 31 detect the second area 52 of the first surface 5 of the second battery 302 to be tested; then the supporting platform 100 is controlled to move along the first direction X again to realize the detection of the corner of the second battery 302 to be tested, and this cycle is repeated to realize the detection of multiple batteries 300 to be tested.

[0115] It should be noted that the explanation of the above steps is based on the fact that the first surface 5 of the battery 300 to be tested is first detected, and then the corner of the battery 300 to be tested is detected. In other implementations, the corner of the battery 300 to be tested may be detected first, and then the first surface 5 of the battery 300 to be tested is detected. Figures 6 to 9 During the detection process, the carrying platform 100 can be controlled to move rightward along the first direction X.

[0116] In the embodiment of the present application, when the first ray source 10 and the first detector 11 detect the first corner 1 of the battery 300 to be tested, the line connecting the center of the ray source focus of the first ray source 10 and the first corner 1 should be perpendicular to the first surface 5 to reduce the influence of distortion on the detection result. Similarly, when the second ray source 20 and the second detector 21 detect the second corner 2 of the battery 300 to be tested, the line connecting the center of the ray source focus of the second ray source 20 and the center of the second corner 2 should be perpendicular to the first surface 5. When the first ray source 10 and the first detector 11 detect the third corner 3 of the battery 300 to be tested, the line connecting the center of the ray source focus of the first ray source 10 and the third corner 3 should be perpendicular to the first surface 5. Similarly, when the second ray source 20 and the second detector 21 detect the fourth corner 4 of the battery 300 to be tested, the line connecting the center of the ray source focus of the second ray source 20 and the center of the fourth corner 4 should be perpendicular to the first surface 5.

[0117] In the embodiment of the present application, when the third ray source 30 and the third detector 31 detect the first area 51 of the first surface 5 of the battery 300 to be tested, the line connecting the center of the ray source focus of the third ray source 30 and the center of the first angle 1 and the second angle 2 should be perpendicular to the first surface 5 to reduce the influence of distortion on the detection result. When the third ray source 30 and the third detector 31 detect the second area 52 of the first surface 5 of the battery 300 to be tested, the line connecting the center of the ray source focus of the third ray source 30 and the center of the third angle 3 and the fourth angle 4 should be perpendicular to the first surface 5 to reduce the influence of distortion on the detection result. The center line of the ray emitted by the third ray source 30 passes through the midpoint of the side where the first angle 1 and the second angle 2 are located, or the center line of the ray emitted by the third ray source 30 passes through the midpoint of the side where the third angle 3 and the fourth angle 4 are located.

[0118] In the embodiment of the present application, the area of ​​the radiation surface of the third ray source 30 on the first surface 5 is greater than or equal to half of the area of ​​the first surface 5, and the detection of the first surface 5 can be realized through two detections, and the detection of the first surface 5 in the detection on both sides is more comprehensive. For example, the third ray source 30 and the third detector 31 are opposite to the left part of the first surface 5 for the first time, and the left part of the first surface 5 is detected, and then the battery 300 to be tested or the third ray source 30 and the third detector 31 are moved so that the third ray source 30 and the third detector 31 are opposite to the right part of the first surface 5, and the right part of the first surface 5 is detected. By controlling the position of the first surface 5 and the third ray source 30 and the third detector 31, it can be achieved that the collection of the radiation surface of the third ray source 30 on the first surface 5 in the two detections can completely cover the first surface, so that the detection is more comprehensive.

[0119] According to some embodiments of the present application, see Figure 3 The first ray source 10 , the second ray source 20 and the third ray source 30 are all located on the same side of the carrying platform 100 .

[0120] In the embodiment of the present application, the first ray source 10 , the second ray source 20 , and the third ray source 30 may be located on the same side of the carrying platform 100 as the battery to be tested 300 .

[0121] In an embodiment of the present application, the first ray source 10, the second ray source 20 and the third ray source 30 are all placed on the same side of the carrying platform 100, and the first detector 11, the second detector 21 and the third detector 31 are all placed on the other side of the carrying platform 100 for easy arrangement.

[0122] According to some embodiments of the present application, at least one of the first ray source 10 , the second ray source 20 , and the third ray source 30 is an integrated ray source.

[0123] Exemplarily, one of the first ray source 10, the second ray source 20 and the third ray source 30 may be an integrated ray source; or two of the first ray source 10, the second ray source 20 and the third ray source 30 may be an integrated ray source; or the first ray source 10, the second ray source 20 and the third ray source 30 may all be integrated ray sources.

[0124] Exemplarily, the first ray source 10 , the second ray source 20 and the third ray source 30 may all be closed-tube integrated X-ray tubes.

[0125] The integrated radiation source has a low rework rate, high stability, small size, and simple later maintenance. The first radiation source 10, the second radiation source 20, or the third radiation source 30 is set as an integrated radiation source to improve the reliability of the detection device.

[0126] The embodiment of the present application provides a battery detection method. The detection method uses the detection device in the above embodiment to detect a battery 300 to be tested. The battery 300 to be tested includes a first corner 1 and a second corner 2. Fig.10 This is a flow chart of a battery detection method according to some embodiments of the present application. Fig.10 , detection methods include:

[0127] Step S101: Acquire a detection image of the battery to be tested.

[0128] The detection image includes a first angular position detection image and a second angular position detection image.

[0129] Step S102: Determine defect information of the battery to be tested based on the detection image.

[0130] Step S103: determining a quality inspection result of the battery to be tested based on the defect information of the battery to be tested.

[0131] In an embodiment of the present application, the first angular position detection image of the battery 300 to be tested can be obtained by detecting the first corner 1 of the battery 300 to be tested through the cooperation of the first ray source 10 and the first detector 11, and the second angular position detection image of the battery 300 to be tested can be obtained by detecting the second corner 2 of the battery 300 to be tested through the cooperation of the second ray source 20 and the second detector 21.

[0132] In the embodiment of the present application, the defect information of the battery 300 to be tested includes morphological defects such as wrinkles and fractures of the electrode piece.

[0133] In the embodiment of the present application, the quality inspection result of the battery 300 to be tested is used to indicate whether the battery 300 to be tested is qualified.

[0134] In an embodiment of the present application, if the electrode piece near the first corner 1 or the second corner 2 of the battery 300 to be tested is wrinkled or broken, a grayscale change will appear in the first angle detection image or the second angle detection image, and the defect information of the battery 300 to be tested can be determined based on the grayscale change in the first angle detection image or the second angle detection image.

[0135] In an embodiment of the present application, the detector can be calibrated before the detection begins to reduce the error of the detected image. For example, the detector needs to be calibrated before formal operation. Before calibration, it is necessary to ensure that there is no debris on the ray source outlet and the detector surface, and there is no obstruction between the ray source and the detector. The ray is required to fully cover the detector receiving surface. The grayscale value of the imaging of the detection device at this time can be adjusted to the calibration grayscale value.

[0136] In an embodiment of the present application, a first angular position detection image and a second angular position detection image of the battery 300 to be tested are respectively obtained, and defect information of the battery 300 to be tested is determined by analyzing the first angular position detection image and the second angular position detection image, so that the distortion in the first angular position detection image and the second angular position detection image can be reduced, so that the first angular position detection image and the actual situation of the first corner 1 of the battery 300 to be tested are closer, and the second angular position detection image and the actual situation of the second corner 2 of the battery 300 to be tested are closer, so that the defect detection inside the battery 300 to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0137] According to some embodiments of the present application, Fig.11 This is a flowchart of step S101 in some embodiments of the present application. Fig.11 , step S101 includes:

[0138] Step S111: controlling so that the first angle is located between the first ray source and the first detector, and the second angle is located between the second ray source and the second detector.

[0139] Step S112: Control the radiation emitted by the first radiation source to be projected to the first detector through the first corner of the battery to be tested.

[0140] Step S113: Control the radiation emitted by the second radiation source to be projected to the second detector through the second corner of the battery to be tested.

[0141] Step S114: determining a first angular detection image based on the rays received by the first detector.

[0142] Step S115: Determine a second angular detection image based on the rays received by the second detector.

[0143] Step S116: determining a detection image of the battery to be tested based on the first angular detection image and the second angular detection image.

[0144] In an embodiment of the present application, during the detection process, the battery 300 to be tested can be controlled to move, and the first ray source 10, the second ray source 20, the first detector 11 and the second detector 21 can also be controlled to move, so that the first corner 1 is located between the first ray source 10 and the first detector 11, and the second corner 2 is located between the second ray source 20 and the second detector 21.

[0145] In the embodiment of the present application, the battery to be tested 300 can be moved by controlling the movement of the carrying platform 100 .

[0146] In the embodiment of the present application, the battery 300 to be tested can be grasped by a manipulator onto the carrying platform 100, and the carrying platform 100 moves the battery 300 to the testing station. In the process of the manipulator grasping the battery 300 to be tested, the accuracy of the grasping position needs to be ensured to ensure the quality of subsequent imaging and provide more accurate original information for subsequent processing.

[0147] In the embodiment of the present application, a soft device can be provided at the gripping and clamping position of the manipulator to reduce the damage to the battery 300 to be tested during the gripping process. A limit block can be provided on the carrying platform 100 to enhance the stability of the battery 300 to be tested during the entire mechanical movement process.

[0148] In the embodiment of the present application, the above-mentioned step S112 and step S113 can be performed simultaneously or distributedly, and step S112 can be performed before step S113 or after step S113. Similarly, the above-mentioned step S114 and step S115 can be performed simultaneously or distributedly, and step S114 can be performed before step S115 or after step S115.

[0149] In the embodiment of the present application, there is no order between the above steps S113 and S114, and step S114 can be performed simultaneously with step S113, or before step S113, or after step S113. However, step S114 must be performed after step S112.

[0150] Similarly, there is no order between the above steps S112 and S115, and step S115 can be performed simultaneously with step S112, or before step S112, or after step S112. However, step S115 must be performed after step S113.

[0151] In an embodiment of the present application, the first corner 1 is controlled to be located between the first ray source 10 and the first detector 11, and the second corner 2 is located between the second ray source 20 and the second detector 21. When defect detection is performed on the battery 300 to be tested, the angle between the ray and the surface where the first corner 1 and the second corner 2 of the battery 300 to be tested are located is as close to 90° as possible, thereby reducing the distortion in the first angle detection image and the second angle detection image, making the first angle detection image and the actual situation of the first corner 1 of the battery 300 to be tested closer, and the second angle detection image and the actual situation of the second corner 2 of the battery 300 to be tested closer. Defect detection is performed on the corners of the battery 300 to be tested by using the first angle detection image and the second angle detection image, so that the defect detection inside the battery 300 to be tested is more comprehensive, and the problems of misjudgment, omission and incomplete defect detection are reduced.

[0152] According to some embodiments of the present application, Fig.12 This is a flowchart of step S114 in some embodiments of the present application. Fig.12 , step S114, comprising:

[0153] Step S1141: collecting a plurality of first original images including a first angle based on the rays received by the first detector;

[0154] Step S1142: Process multiple first original images to obtain a first corner detection image.

[0155] In an embodiment of the present application, the first original image is an unprocessed image. At this time, the first corner 1 or the second corner 2 of the battery 300 to be tested in the image is not clear enough. After processing multiple first original images, the first corner 1 or the second corner 2 in the image is clearer, and the defects of the battery 300 to be tested are more easily identified.

[0156] If only one original image is collected, if this image has an error, the first corner position detection image processed later will also have an error, affecting the accuracy of the detection. In the embodiment of the present application, multiple first original images are collected and processed. If one of the first original images has an error, the other first original images are still correct, which can also reduce the impact of the error on the detection result.

[0157] In the embodiment of the present application, if the battery 300 to be tested, the first ray source 10 and the first detector 11 are all fixed during the acquisition process, the difference between the multiple first original images is small.

[0158] According to some embodiments of the present application, Fig.13 This is a flowchart of step S1142 in some embodiments of the present application. Fig.13 , step S1142, comprising:

[0159] Step S11421: filter the plurality of first original images to obtain a first filtered image.

[0160] Step S11422: performing noise reduction processing on the first filtered image to obtain a first noise reduction image.

[0161] Step S11423: intercepting a first detection area in the first denoised image to obtain a first corner detection image, where the first detection area is an area in the first denoised image that includes the first corner.

[0162] In the embodiment of the present application, the filtering process may include mean filtering process, Gaussian filtering process, etc. The irrelevant information in the plurality of first original images may be removed, and the signal-to-noise ratio of the first original images may be improved.

[0163] In an embodiment of the present application, a first denoised image is obtained by denoising the first filtered image, and random noises such as quantum noise, aliasing noise, and electronic noise in the first filtered image can be removed, thereby greatly improving the signal-to-noise ratio of the first filtered image.

[0164] The first original image collected by the first ray source 10 and the first detector 11 includes not only the first corner but also other areas. In the embodiment of the present application, the area with the first corner 1 is cut out. On the one hand, it can reduce subsequent calculations, and on the other hand, it can reduce the impact of errors in other areas on the defect detection of the first corner 1.

[0165] In an embodiment of the present application, multiple first original images are processed through the above steps to obtain a first angular detection image. A similar method can also be used to control the second detector to collect multiple second original images including the second corner, and perform the above processing on the multiple second original images to obtain a second angular detection image.

[0166] According to some embodiments of the present application, the first corner 1 is adjacent to the second corner 2, and the battery to be tested 300 further includes a third corner 3 and a fourth corner 4 adjacent to each other, 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 This is a flowchart of step S101 in some other embodiments of the present application. Fig.14 , step S101 further includes:

[0167] Step S117: Control the movement of the battery to be tested so that the third corner is located between the first ray source and the first detector, and the fourth corner is located between the second ray source and the second detector.

[0168] Step S118: Control the radiation emitted by the first radiation source to be projected to the first detector through the third triangle of the battery to be tested.

[0169] Step S119: controlling the radiation emitted by the second radiation source to be projected to the second detector through the fourth corner of the battery to be tested.

[0170] Step S1110: Determine a third angle detection image of a third corner based on the rays received by the first detector.

[0171] Step S1111: Determine a fourth angular position detection image of a fourth corner based on the rays received by the second detector.

[0172] Step S1112: determining a detection image of the battery to be tested based on the first angular detection image, the second angular detection image, the third angular detection image and the fourth angular detection image.

[0173] In the embodiment of the present application, the battery to be tested 300 can be moved by controlling the movement of the carrying platform 100 .

[0174] In the embodiment of the present application, the above-mentioned step S118 and step S119 can be performed simultaneously or distributedly, and step S118 can be performed before step S119 or after step S119. Similarly, the above-mentioned step S1110 and step S1111 can be performed simultaneously or distributedly, and step S1110 can be performed before step S1111 or after step S1111.

[0175] In the embodiment of the present application, there is no order between the above step S119 and step S1110, and step S1110 can be performed simultaneously with step S119, or before step S119, or after step S119. However, step S1110 must be performed after step S118.

[0176] Similarly, there is no order between the above steps S118 and S1111, and step S1111 can be performed simultaneously with step S118, or before step S118, or after step S1111. However, step S1111 must be performed after step S119.

[0177] In an embodiment of the present application, the above steps can also be used to detect the third corner 3 and the fourth corner 4 of the battery 300 to be tested, making the detection of the battery 300 to be tested more comprehensive, and at the same time making the third corner detection image and the actual situation of the third corner 3 of the battery 300 to be tested closer, and the fourth corner detection image and the actual situation of the fourth corner 4 of the battery 300 to be tested closer, thereby reducing the problems of misjudgment, omission and incomplete defect detection.

[0178] According to some embodiments of the present application, the battery to be tested 300 is located on the carrying platform 100, the third corner 3 and the first corner 1 are arranged along the first direction X, and the fourth corner 4 and the second corner 2 are arranged along the first direction X, and step S117 includes:

[0179] Step S1171: Control the carrying platform to move along the first direction so that the third corner is located between the first ray source and the first detector, and the fourth corner is located between the second ray source and the second detector.

[0180] In the embodiment of the present application, the first direction X is parallel to one of the sides of the first surface 5. Since the battery 300 to be tested is a cuboid, 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.

[0181] Exemplarily, the distance that the carrying platform 100 moves along the first direction X is equal to the distance between the third corner 3 and the first corner 1 .

[0182] In the embodiment of the present application, controlling the movement of the carrying platform 100 is simpler than controlling the movement of the battery 300 to be tested, and there is no need to change the positional relationship between the battery 300 to be tested and the carrying platform 100, so that the battery 300 to be tested is more stable.

[0183] According to some embodiments of the present application, the battery to be tested 300 further includes a first surface 5, the first surface 5 is perpendicular to the thickness direction Z of the battery to be tested 300, the first corner 1 and the second corner 2 are both located on the first surface 5, Fig.15 This is a flowchart of step S101 in some other embodiments of the present application. Fig.15 , step S101 further includes:

[0184] Step S1113: controlling the first surface so that it is located between the third ray source and the third detector.

[0185] Step S1114: controlling the radiation emitted by the third radiation source to be projected to the third detector through the first surface of the battery to be tested.

[0186] Step S1115: determining a first surface detection image of the first surface based on the rays received by the third detector.

[0187] Step S1116: Determine defect information of the battery to be tested based on the first angular detection image, the second angular detection image, the third angular detection image, the fourth angular detection image and the first surface detection image.

[0188] In the embodiment of the present application, there is no strict order requirement for the detection of the first surface 5 of the battery 300 to be tested and the detection of the corner of the battery 300 to be tested, and they can be performed simultaneously or in steps. Figures 3 to 9Explanation of the.

[0189] In the embodiment of the present application, the battery 300 to be tested also includes the first surface 5 and is tested through the above steps, so as to achieve a more comprehensive test of the battery 300 to be tested.

[0190] According to some embodiments of the present application, the first surface 5 includes a first area 51 and a second area 52 connected to each other. Fig.16 This is a flowchart of step S1114 in some embodiments of the present application. Fig.16 , step S1114 includes:

[0191] Step S11141: Control so that the rays emitted by the third ray source are projected to the third detector through at least the first area.

[0192] Step S11142: Control so that the rays emitted by the third ray source are projected to the third detector through at least the second area.

[0193] In the embodiment of the present application, the third ray source 30 can be controlled to be opposite to the first area 51 and the second area 52 during the detection on both sides by controlling the movement of the battery to be tested 300 .

[0194] In an embodiment of the present application, a first area detection image and a second area detection image can be respectively determined based on the rays received by the third detector; and then a first surface detection image of the first surface can be determined based on the first area detection image and the second area detection image.

[0195] In the embodiment of the present application, by inspecting the first surface 5 twice, omissions in the inspection of the first surface 5 can be reduced, thereby making the defect detection of the battery 300 to be tested more comprehensive.

[0196] According to some embodiments of the present application, Fig.17 This is a flowchart of step S102 in some embodiments of the present application. Fig.17 , step S102 includes:

[0197] Step S121: Determine the number of defects and / or defect sizes of the battery to be tested based on the detection image.

[0198] Step S122: Determine defect information of the battery to be tested based on the defect quantity and / or defect size.

[0199] In the embodiment of the present application, both the defect quantity and defect size are standards for measuring defects in the battery 300 to be tested. The defect quantity is the sum of the quantities of all defects in the battery 300 to be tested, and the defect size is the size of each individual defect.

[0200] According to some embodiments of the present application, step S103 includes:

[0201] Step S131: In response to the defect quantity being greater than a preset quantity, determining that the battery to be tested is unqualified.

[0202] In the embodiment of the present application, when the number of defects is greater than a preset number, it indicates that there are many defects in the battery 300 to be tested, and it is determined that the battery 300 to be tested is unqualified.

[0203] According to some embodiments of the present application, step S103 includes:

[0204] Step S132: In response to the defect size being larger than a preset size, determining that the battery to be tested is unqualified.

[0205] In the embodiment of the present application, when the defect size is larger than the preset size, it means that the defect size in the battery 300 to be tested is large, and it is determined that the battery 300 to be tested is unqualified.

[0206] According to some embodiments of the present application, step S103 further includes:

[0207] Step S133: In response to the defect quantity being less than or equal to a preset quantity and the defect size being less than or equal to a preset size, determining that the battery to be tested is qualified.

[0208] It should be noted that the above steps are explanations of the defect detection of each battery to be tested. In actual applications, the defect detection of multiple batteries to be tested can be implemented in the whole process. The defect detection of multiple batteries to be tested can refer to the above detection device. Figures 6 to 9 The explanation of the description will not be repeated in this application.

[0209] In an embodiment of the present application, the effectiveness of the detection device is calibrated before detection, and an experimental battery is made according to the defect samples of various sizes and types to be detected defined in the detection requirements. The experimental battery is tested before inspection. If the defects on the experimental battery can all be determined by the algorithm and marked as NG products and discharged, it proves that the detection device is effective. Otherwise, the device detection needs to be suspended until the debugging algorithm defects are all determined to be NG.

[0210] In an embodiment of the present application, the defect detection image can be specifically calibrated and identified before detection, and the defects can be automatically identified and determined through an artificial intelligence (AI) algorithm.

[0211] In an embodiment of the present application, each detection process can be fed back to the AI ​​algorithm, and the AI ​​algorithm can continuously optimize the identification and judgment of defects according to each detection process, thereby improving the accuracy of defect identification.

[0212] For example, after a defect is identified, the defect can be marked to facilitate staff to observe the defect.

[0213] An embodiment of the present application provides a battery detection device, wherein the battery to be tested 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 battery to be tested, the detection image including a first corner detection image and a second corner detection image; a first determination module, configured to determine defect information of the battery to be tested based on the detection image; and a second determination module, configured to determine a quality detection result of the battery to be tested based on the defect information of the battery to be tested.

[0214] In some embodiments of the present application, the acquisition module includes: a first control submodule, configured to control the first angle to be located between the first ray source and the first detector, and the second angle to be located between the second ray source and the second detector; a second control submodule, configured to control the rays emitted by the first ray source to be projected onto the first detector through the first angle of the battery to be tested; a third control submodule, configured to control the rays emitted by the second ray source to be projected onto the second detector through the second angle of the battery to be tested; a first determination submodule, configured to determine a first angular position detection image based on the rays received by the first detector; the first determination submodule, configured to determine a second angular position detection image based on the rays received by the second detector; and a third determination submodule, configured to determine a detection image of the battery to be tested based on the first angular position detection image and the second angular position detection image.

[0215] In some embodiments of the present application, the first determination submodule includes: an acquisition unit, configured to acquire multiple first original images including a first angle based on rays received by the first detector; and a processing unit, configured to process the multiple first original images to obtain a first angular detection image.

[0216] In some embodiments of the present application, the processing unit includes: a filtering subunit, configured to filter a plurality of first original images to obtain a first filtered image; a denoising subunit, configured to perform denoising on the first filtered image to obtain a first denoised image; and a capture subunit, configured to capture a first detection area in the first denoised image to obtain a first corner detection image, wherein the first detection area is an area in the first denoised image that includes a first corner.

[0217] In some embodiments of the present application, the first angle is adjacent to the second angle, the battery to be tested further includes adjacent third and fourth angles, the third angle is adjacent to the first angle, and the fourth angle is adjacent to the second angle, and the acquisition module includes: a fourth control submodule, configured to control the movement of the battery to be tested so that the third angle is located between the first ray source and the first detector, and the fourth angle is located between the second ray source and the second detector; a fifth control submodule, configured to control the rays emitted by the first ray source to be projected to the first detector through the third angle of the battery to be tested; a sixth control submodule, configured to control the rays emitted by the second ray source to be projected to the second detector through the fourth corner of the battery to be tested; a fourth determination submodule, configured to determine the third angle position detection image of the third angle based on the rays received by the first detector; a fifth determination submodule, configured to determine the fourth angle position detection image of the fourth angle based on the rays received by the second detector; and a sixth determination submodule, configured to determine the detection image of the battery to be tested based on the first angle position detection image, the second angle position detection image, the third angle position detection image, and the fourth angle position detection image.

[0218] In some embodiments of the present application, the battery to be tested is located on a carrying platform, the third corner and the first corner are arranged along the first direction, the fourth corner and the second corner are arranged along the first direction, and the fourth control submodule is further configured to control the movement of the carrying platform along the first direction, so that the third corner is located between the first ray source and the first detector, and the fourth corner is located between the second ray source and the second detector.

[0219] In some embodiments of the present application, the battery to be tested also includes a first surface, the first surface is perpendicular to the thickness direction of the battery to be tested, and the first angle and the second angle are both located on the first surface, and the acquisition module also includes: a seventh control submodule, configured to control the first surface to be located between the third ray source and the third detector; an eighth control submodule, configured to control the rays emitted by the third ray source to be projected to the third detector through the first surface of the battery to be tested; a seventh determination submodule, configured to determine a first surface detection image of the first surface based on the rays received by the third detector; and an eighth determination submodule, configured to determine the detection image of the battery to be tested based on the first angular position detection image, the second angular position detection image, the third angular position detection image, the fourth angular position detection image and the first surface detection image.

[0220] In some embodiments of the present application, the first surface includes a first area and a second area that are interconnected, and the eighth control submodule includes: a first control unit, configured to control so that the rays emitted by the third ray source are projected to the third detector through at least the first area; a second control unit, controlling so that the rays emitted by the third ray source are projected to the third detector through at least the second area.

[0221] In some embodiments of the present application, the first determination module includes: a first determination unit, configured to determine the number of defects and / or defect size of the battery to be tested based on the first angular detection image and the second angular detection image; a second determination unit, configured to determine the defect information of the battery to be tested based on the number of defects and / or defect size.

[0222] In some embodiments of the present application, the second determination module includes: a third determination unit configured to determine that the battery to be tested is unqualified in response to the number of defects being greater than a preset number.

[0223] In some embodiments of the present application, the second determination module includes: a fourth determination unit configured to determine that the battery to be tested is unqualified in response to the defect size being larger than a preset size.

[0224] For the specific definition of the battery detection device, please refer to the definition of the battery detection method above, which will not be repeated here. Each module in the above-mentioned battery detection device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the electronic device in the form of hardware, or can be stored in the memory of the electronic device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0225] The present application provides a method for producing a battery. Fig.18 This is a flow chart of a method for producing a battery according to some embodiments of the present invention. Fig.18 , methods include:

[0226] Step S301: The quality of the battery to be tested is tested by using the method in the above embodiment to determine the quality test result of the battery to be tested.

[0227] The battery production method provided in the embodiment of the present application can determine the defects of the battery 300 to be tested, and can determine the quality of the battery 300 to be tested based on the defects of the battery 300 to be tested.

[0228] According to some embodiments of the present application, see Fig.18 , the method further comprises:

[0229] Step S302: In response to the quality inspection result of the battery to be tested being unqualified, the unqualified battery is discarded.

[0230] In the embodiment of the present application, the quality of the battery 300 to be tested can be determined according to the quality inspection result of the battery 300 to be tested, unqualified batteries can be eliminated, and the stability of the device or equipment using the battery can be improved.

[0231] For example, batteries that pass the test can proceed to the next process.

[0232] An embodiment of the present application provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery detection method in the above embodiment or the battery production method in the above embodiment.

[0233] An embodiment of the present application provides a battery production device, including the electronic device in the above embodiment.

[0234] An embodiment of the present application provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the battery detection method in the above embodiment or the battery production method in the above embodiment is implemented.

[0235] An embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the battery detection method in the above embodiment or the battery production method in the above embodiment.

[0236] An embodiment of the present application provides a detection device for detecting a battery, wherein the battery 300 to be tested is a laminated battery, and the battery 300 to be tested includes a first surface 5, which is perpendicular to the thickness direction Z of the battery 300 to be tested, and 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, and the first corner 1 is adjacent to the second corner 2, and the first corner 1 is adjacent to the third corner 3.

[0237] The detection device includes a first ray source 10, a first detector 11, a second ray source 20, a second detector 21, a third ray source 30, a third detector 31 and a carrying platform 100. The first ray source 10, the second ray source 20 and the third ray source 30 are all located on the same side of the carrying platform 100, the first ray source 10, the second ray source 20 and the third ray source 30 are all closed tube integrated X-ray tubes, and the first detector 11, the second detector 21 and the third detector 31 are all flat panel detectors. The size D1 of the ray source focus of the first ray source 10 and the size D2 of the ray source focus of the second ray source 20 satisfy D1≤10μm and D2≤10μm, and the size D3 of the ray source focus of the third ray source 30 satisfies 10μm<D3≤30μm.

[0238] The first detector 11 is opposite to the exit port of the first ray source 10, the second detector 21 is opposite to the exit port of the second ray source 20, and the third detector 31 is opposite to the exit port of the third ray source 30. The carrying platform 100 is located between the first ray source 10 and the first detector 11, the carrying platform 100 is located between the second ray source 20 and the second detector 21, and the carrying platform 100 is located between the third ray source 30 and the third detector 31, and the carrying platform 100 is configured to place the battery to be tested. The ray emitted by the first ray source 10 is projected to the first detector 11 through the first corner 1 of the battery to be tested placed on the carrying platform 100, and the first detector 11 is used to determine the first angle position detection image of the first corner based on the received ray; the ray emitted by the first ray source 10 is projected to the first detector 11 through the third corner 3 of the battery to be tested placed on the carrying platform 100, and the first detector 11 is used to determine the third angle position detection image of the third corner 3 based on the received ray. The radiation emitted by the second radiation source 20 is projected to the second detector 21 through the second corner 2 of the battery to be tested placed on the carrying platform 100, and the second detector 21 is used to determine the second angular position detection image of the second corner based on the received radiation. The radiation emitted by the second radiation source 20 is projected to the second detector 21 through the fourth corner 4 of the battery to be tested placed on the carrying platform 100, and the second detector 21 is used to determine the fourth angular position detection image of the fourth corner 4 based on the received radiation. The radiation emitted by the third radiation source 30 is projected to the third detector 31 through the first surface 5 of the battery to be tested placed on the carrying platform 100, and the third detector 31 is used to determine the first surface detection image of the first surface 5 based on the received radiation.

[0239] The detection device further includes a detection unit 200, which is respectively connected to the first detector 11, the second detector 21 and the third detector 31. The detection unit 200 is configured to perform defect detection on the battery to be tested based on the first angular detection image, the second angular detection image, the third angular detection image, the fourth angular detection image and the first surface detection image.

[0240] The embodiment of the present application also provides a battery detection method, Fig.19 This is a flow chart of a battery detection method according to some embodiments of the present application. Fig.19 , the method comprising:

[0241] Step S401: Control the radiation emitted by the third radiation source to project to the third detector through the first area of ​​the first surface of the battery to be tested.

[0242] Step S402: determining a first region detection image based on the rays received by the third detector.

[0243] Step S403: Control the carrying platform to move so that the rays emitted by the third ray source are projected to the third detector through the second area of ​​the first surface of the battery to be tested.

[0244] Step S404: determining a second region detection image based on the rays received by the third detector.

[0245] Step S405: determining a first surface detection image of the first surface based on the first area detection image and the second area detection image.

[0246] Step S406: Control the movement of the carrying platform so that the rays emitted by the first ray source are projected to the first detector through the first corner of the battery to be tested, and the rays emitted by the second ray source are projected to the second detector through the second corner of the battery to be tested.

[0247] Step S407: determining a first angular position detection image based on the rays received by the first detector, and determining a second angular position detection image based on the rays received by the second detector.

[0248] Step S408: Control the movement of the carrying platform so that the rays emitted by the first ray source are projected to the first detector through the third corner of the battery to be tested, and the rays emitted by the second ray source are projected to the second detector through the fourth corner of the battery to be tested.

[0249] Step S409: determining a third angular position detection image based on the rays received by the first detector, and determining a fourth angular position detection image based on the rays received by the second detector.

[0250] Step S410: Determine defect information of the battery to be tested 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.

[0251] Step S411: determining a quality inspection result of the battery to be tested based on defect information of the battery to be tested.

[0252] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A detection device for detecting a battery, wherein the battery to be detected is a laminated battery, characterized in that: The detection device comprises: A first ray source (10); A second ray source (20); A first detector (11), opposite to the emission port of the first ray source (10); A second detector (21), opposite to the emission port of the second ray source (20); A carrying platform (100) is configured to place the battery to be tested, the carrying platform (100) is movable, and a moving track of the carrying platform (100) passes between the first ray source (10) and the first detector (11), and a moving track of the carrying platform (100) passes between the second ray source (20) and the second detector (21); and A detection unit (200) is connected to the first detector (11) and the second detector (21), respectively, and the detection unit (200) is configured to perform defect detection on the battery to be tested based on the rays received by the first detector (11) and the rays received by the second detector (21).

2. The detection device according to claim 1, characterized in that: 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.

3. The detection device according to claim 1 or 2, characterized in that: The detection device also includes: a third ray source (30); A third detector (31), opposite to the emission port of the third ray source (30); The moving track of the carrying platform (100) also passes between the third ray source (30) and the third detector (31), and the detection unit (200) is further configured to perform defect detection on the battery to be tested based on the rays received by the third detector (31).

4. The detection device according to claim 3, characterized in that: The size D3 of the radiation source focus of the third radiation source (30) satisfies: 10 μm<D3≤30 μm.

5. The detection device according to claim 3 or 4, characterized in that: The area of ​​the radiation surface of the third ray source (30) on the first surface of the battery to be tested is greater than or equal to half the area of ​​the first surface, and the first surface is the surface of the battery to be tested that is opposite to the emission port of the third ray source (30).

6. The detection device according to any one of claims 3 to 5, characterized in that: The first ray source (10), the second ray source (20) and the third ray source (30) are all located on the same side of the carrying platform (100).

7. The detection device according to any one of claims 3 to 6, characterized in that: At least one of the first ray source (10), the second ray source (20) and the third ray source (30) is an integrated ray source.

8. A battery detection method, wherein the detection method uses the detection device according to any one of claims 1 to 7 to detect the battery to be detected, wherein the battery to be detected comprises a first corner and a second corner, and is characterized in that: The detection method comprises: Acquire a detection image of the battery to be tested, wherein the detection image includes a first angular detection image and a second angular detection image; Determining defect information of the battery to be tested based on the detection image; A quality inspection result of the battery to be tested is determined based on the defect information of the battery to be tested.

9. The method according to claim 8, characterized in that Acquiring a detection image of the battery to be tested, comprising: By controlling, the first angle is located between the first ray source and the first detector, and the second angle is located between the second ray source and the second detector; Controlling the rays emitted by the first ray source to be projected to the first detector through the first corner of the battery to be tested; Controlling the radiation emitted by the second radiation source to be projected to the second detector through the second corner of the battery to be tested; determining the first angular position detection image based on the rays received by the first detector; determining the second angular position detection image based on the rays received by the second detector; A detection image of the battery to be tested is determined based on the first angular detection image and the second angular detection image.

10. The method according to claim 9, characterized in that Determining the first angular position detection map based on the rays received by the first detector includes: collecting a plurality of first original images including the first angle based on the rays received by the first detector; The plurality of first original images are processed to obtain the first corner detection image.

11. The method according to claim 10, characterized in that Processing the plurality of first original images to obtain the first corner detection image includes: Performing filtering on the plurality of first original images to obtain a first filtered image; Performing noise reduction processing on the first filtered image to obtain a first noise-reduced image; A first detection area in the first denoised image is intercepted to obtain the first corner detection image, where the first detection area is an area in the first denoised image that includes the first corner.

12. The method according to any one of claims 9 to 11, characterized in that The first angle is adjacent to the second angle, the battery to be tested further includes adjacent third and fourth angles, the third angle is adjacent to the first angle, and the fourth angle is adjacent to the second angle, and acquiring a detection image of the battery to be tested includes: Controlling the movement of the battery to be tested so that the third angle is located between the first ray source and the first detector, and the fourth angle is located between the second ray source and the second detector; Controlling the radiation emitted by the first radiation source to be projected to the first detector through the third triangle of the battery to be tested; Controlling the radiation emitted by the second radiation source to be projected to the second detector through the fourth corner of the battery to be tested; Determine a third angle detection image of the third corner based on the rays received by the first detector; determining a fourth angular position detection image of the fourth corner based on the rays received by the second detector; A detection image of the battery to be tested is determined based on the first angular detection image, the second angular detection image, the third angular detection image, and the fourth angular detection image.

13. The method according to claim 12, characterized in that The battery to be tested is located on a carrying platform, the third angle and the first angle are arranged along a first direction, the fourth angle and the second angle are arranged along the first direction, and the battery to be tested is controlled to move so that the third angle is located between the first ray source and the first detector, and the fourth angle is located between the second ray source and the second detector, including: The carrying platform is controlled to move along the first direction so that the third angle is located between the first ray source and the first detector, and the fourth angle is located between the second ray source and the second detector.

14. The method according to claim 13, characterized in that The battery to be tested further includes a first surface, the first surface is perpendicular to the thickness direction of the battery to be tested, the first angle and the second angle are both located on the first surface, and obtaining a detection image of the battery to be tested includes: By controlling the first surface to be located between the third ray source and the third detector; Controlling the radiation emitted by the third radiation source to be projected to the third detector through the first surface of the battery to be tested; determining a first surface detection image of the first surface based on the rays received by the third detector; A detection image of the battery to be tested is determined based on the first angular detection image, the second angular detection image, the third angular detection image, the fourth angular detection image, and the first surface detection image.

15. The method according to claim 14, characterized in that The first surface includes a first area and a second area connected to each other, and controlling the radiation emitted by the third radiation source to be projected to the third detector through the first surface of the battery to be tested includes: Controlling so that the radiation emitted by the third radiation source is projected to the third detector through at least the first area; The radiation emitted by the third radiation source is controlled so as to be projected to the third detector through at least the second area.

16. The method according to any one of claims 8 to 15, characterized in that Determining defect information of the battery to be tested based on the detection image includes: Determine the number and / or size of defects of the battery to be tested based on the detection image; Defect information of the battery to be tested is determined based on the defect quantity and / or the defect size.

17. The method according to claim 16, characterized in that Determining a quality inspection result of the battery to be tested based on the defect information of the battery to be tested includes: In response to the defect quantity being greater than a preset quantity, the battery to be tested is determined to be unqualified.

18. The method according to claim 16, characterized in that Determining a quality inspection result of the battery to be tested based on the defect information of the battery to be tested includes: In response to the defect size being larger than a preset size, the battery to be tested is determined to be unqualified.

19. A battery detection device, wherein the battery to be tested comprises a first corner and a second corner, wherein the first corner is adjacent to the second corner, wherein: The battery detection device comprises: An acquisition module is configured to acquire a detection image of the battery to be tested, wherein the detection image includes a first angular detection image and a second angular detection image; A first determination module is configured to determine defect information of the battery to be tested based on the detection image; The second determination module is configured to determine the quality detection result of the battery to be tested based on the defect information of the battery to be tested.

20. A method for producing a battery, characterized in that: The method comprises: The quality of the battery to be tested is tested by the method according to any one of claims 8 to 18 to determine the quality test result of the battery to be tested.

21. The method according to claim 20, characterized in that The method further comprises: In response to the quality inspection result of the battery to be tested being unqualified, the unqualified battery is discarded.

22. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; Wherein, the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery detection method described in any one of claims 8 to 18 or the battery production method described in claim 20 or 21.

23. A battery production device, characterized in that: Comprising the electronic device as claimed in claim 22.

24. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the battery detection method according to any one of claims 8 to 18 or the battery production method according to claim 20 or 21 is implemented.

25. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the battery detection method according to any one of claims 8 to 18 or the battery production method according to claim 20 or 21.

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