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

Abstract

The invention provides a battery detection method and device, a battery production method, equipment and a medium, and belongs to the field of batteries. The method comprises the steps that a detection image of a to-be-detected battery is obtained, the detection image is an image, collected by a ray detector, of the to-be-detected battery when the to-be-detected battery and the ray detector conduct at least two times of relative movement, in one time of relative movement between the to-be-detected battery and the ray detector, a first side edge extends in the movement direction, and a second side edge extends in the movement direction; in the other relative movement between the battery to be detected and the ray detector, the second side edge extends along the movement direction; determining defect information of the to-be-detected battery based on the detection image; and determining a quality detection result of the to-be-detected battery based on the defect information of the to-be-detected battery. And through at least two times of movement, the influence of distortion at the four side edges can be at least reduced, so that the detection precision of the whole to-be-detected battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery detection method, device, 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 the production or use process. Some defects may not be observed from the outside of the battery and require internal testing of the battery.

[0004] In the related art, when inspecting a battery, the imaging of the side of the battery is easily distorted, and the accuracy of defect detection is not high. 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 object of the present application is to provide a battery detection method, device, production method, equipment and medium to improve the accuracy of battery defect detection.

[0006] An embodiment of the first aspect of the present application provides a battery detection method, wherein the battery to be tested is a stacked battery, the battery to be tested includes a first surface, the first surface has adjacent first side edges and second side edges, and the method includes: obtaining a detection image of the battery to be tested, the detection image being an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other at least twice, in which the first side edge extends along the moving direction during one of the relative movements between the battery to be tested and the radiation detector, and the second side edge extends along the moving direction during another relative movement between the battery to be tested and the radiation detector; determining defect information of the battery to be tested based on the detection image; and determining a quality detection result of the battery to be tested based on the defect information of the battery to be tested.

[0007] In the technical solution of the embodiment of the present application, since the detection image is an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other for at least two times, and in one of the relative movements between the battery to be tested and the radiation detector, the first side edge extends along the moving direction, and in another relative movement between the battery to be tested and the radiation detector, the second side edge extends along the moving direction, through at least two movements, the influence of distortion at the four sides can be at least reduced, thereby improving the detection accuracy of the entire battery to be tested.

[0008] In some embodiments, the battery to be tested is located on a carrier platform, and the radiation detector includes a radiation source and a detector opposite to the emission port of the radiation source. Acquiring a detection image of the battery to be tested includes: controlling the movement of the carrier platform; in response to the battery to be tested being located between the radiation source and the corresponding detector, controlling the radiation source to emit radiation that passes through the battery to be tested and projects onto the detector; and determining the detection image of the battery to be tested based on the radiation received by the detector. It is more convenient to control the movement of the battery to be tested by controlling the movement of the carrier platform. When the battery to be tested is located between the radiation source and the detector, when performing defect detection on the battery to be tested, the angle between the radiation and the surface where the detection point of the battery to be tested is located can be made as close to 90° as possible, thereby reducing the distortion in the detection image, making the detection image closer to the actual situation of the battery to be tested, and performing defect detection on the corners of the battery to be tested through the detection image, so that the defect detection inside the battery to be tested is more comprehensive and the detection accuracy is improved.

[0009] In some embodiments, the carrying platform is connected to the annular guide rail, the annular guide rail includes a first part and a second part connected to each other, the extension direction of one of the first part and the second part is parallel to the extension direction of the first side edge, and the extension direction of the other of the first part and the second part is parallel to the extension direction of the second side edge, and controlling the movement of the carrying platform includes: controlling the annular guide rail to work. By setting the annular guide rail and controlling the movement of the battery to be tested through the annular guide rail, it can be achieved that the battery to be tested can move in different directions in two movements, which is more convenient.

[0010] In some embodiments, the ray source includes a first ray source and a second ray source that are spaced apart, the detector includes a first detector and a second detector, the first detector is opposite to the exit port of the first ray source, the second detector is opposite to the exit port of the second ray source, the first part is located between the first detector and the first ray source, and the second part is located between the second detector and the second ray source. In response to the battery to be tested being located between the ray source and the detector corresponding thereto, the ray source is controlled to emit rays that pass through the battery to be tested and project to the detector, including: in response to the battery to be tested being located between the first ray source and the first detector, the first ray source is controlled to emit rays that pass through the battery to be tested and project to the first detector; in response to the battery to be tested being located between the second ray source and the second detector, the second ray source is controlled to emit rays that pass through the battery to be tested and project to the second detector. The first ray source and the first detector are set to detect the battery to be tested during the first movement, and the second ray source and the second detector are set to detect the battery to be tested during the second movement, that is, different ray sources and detectors are used for detection in the two movements of the battery to be tested, so that it is more convenient to avoid the need for the ray source and the detector to move with the battery to be tested. At the same time, continuous detection can be achieved, and the detection efficiency is higher.

[0011] In some embodiments, determining a test image of a battery to be tested based on the rays received by the detector includes: determining a first test image of the battery to be tested based on the rays received by the first detector; determining a second test image of the battery to be tested based on the rays received by the second detector; and determining a test image based on the first test image and the second test image. The first detector receives rays emitted by a first ray source when the battery to be tested is in a first movement, and the second detector receives rays emitted by a second ray source when the battery to be tested is in a second movement. The two rays are imaged separately through two ray sources and two detectors, and will not interfere with each other.

[0012] In some embodiments, the carrying platform is rotatable, the rotation center axis of the carrying platform is perpendicular to the surface of the carrying platform, the rotation angle of the carrying platform is greater than or equal to the angle between the first side and the second side, and the movement of the carrying platform is controlled, including: controlling the first side of the battery to be tested to extend along the first direction; controlling the carrying platform to move along the first direction; controlling the carrying platform to rotate so that the second side of the battery to be tested extends along the second direction, wherein the first direction is parallel to the second direction but in opposite directions; controlling the carrying platform to move along the second direction. By rotating the carrying platform, the moving direction of the battery to be tested can be the same in the two movements, but the relative position between the radiation detector and the battery to be tested is changed, so that the radiation detector can obtain the detection images of the battery to be tested in two different movement processes. That is, the detection images of the battery to be tested in two different movement processes can be obtained by one radiation detector, and the movement trajectory of the carrying platform is shorter, so that the occupied volume of the entire detection device is smaller.

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

[0014] In some embodiments, the detector includes a TDI detector. The imaging effect of the TDI detector is better, so that the detected image is closer to the actual situation, which can further improve the detection accuracy. At the same time, the TDI detector can output high-quality images even in dark places, which can also improve the detection accuracy.

[0015] In some embodiments, obtaining a test image of the battery to be tested includes: controlling a radiation detector to collect an original image including the battery to be tested; and processing the original image to obtain a test image of the battery to be tested. The original image is an unprocessed image, and the battery to be tested in the image is not clear enough. After processing multiple original images, the battery to be tested in the image is clearer, and defects of the battery to be tested are more easily identified.

[0016] In some embodiments, processing the original image to obtain a detection image includes: filtering the original image to obtain a filtered image; performing noise reduction on the filtered image to obtain a noise-reduced image; and intercepting a detection area in the noise-reduced image to obtain a detection image, wherein the detection area includes an area having a battery to be tested. Filtering and noise reduction can improve the signal-to-noise ratio of the original image. The original image includes not only the battery to be tested but also images of other components. In an embodiment of the present application, intercepting the area having the battery to be tested can reduce subsequent calculations on the one hand, and can also reduce the impact of errors in other components on the defect detection of the battery to be tested.

[0017] In some embodiments, determining defect information of the battery to be tested based on the detection image includes: determining the number of defects and / or defect size of the battery to be tested based on the detection image; determining 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.

[0018] 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.

[0019] 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 any defect size in 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.

[0020] An embodiment of the second aspect of the present application provides a battery detection device, wherein the battery to be tested is a stacked battery, the battery to be tested includes a first surface, the first surface has adjacent first and second side edges, and the device includes: an acquisition module, configured to acquire a detection image of the battery to be tested, the detection image being an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other at least twice, in which the first side edge extends along the moving direction in one of the relative movements between the battery to be tested and the radiation detector, and the second side edge extends along the moving direction in another relative movement between the battery to be tested and the radiation detector; 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.

[0021] The third 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.

[0022] 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.

[0023] An embodiment of the fourth 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 the above embodiments.

[0024] An embodiment of the fifth aspect of the present application provides a battery production device, including the electronic device in the above embodiment.

[0025] An embodiment of the sixth 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 of the claims or the battery production method of any one of the above embodiments of the claims.

[0026] An embodiment of the seventh 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 the above embodiments.

[0027] 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

[0028] 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.

[0029] Figure 1A flowchart of a battery detection method according to some embodiments of the present application;

[0030] Figure 2 A schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application;

[0031] Figure 3 A schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application;

[0032] Figure 4 This is a flowchart of step S10 in some embodiments of the present application;

[0033] Figure 5 A schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application;

[0034] Figure 6 A schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application;

[0035] Figure 7 This is a flowchart of step S12 in some embodiments of the present application;

[0036] Figure 8 This is a flowchart of step S13 in some embodiments of the present application;

[0037] Fig. 9 This is a flowchart of step S11 in some embodiments of the present application;

[0038] Fig.10 This is a flowchart of step S10 in some embodiments of the present application;

[0039] Fig.11 This is a flowchart of step S15 in some embodiments of the present application;

[0040] Fig.12 This is a flowchart of step S20 in some embodiments of the present application;

[0041] Fig.13 This is a flowchart of step S30 in some embodiments of the present application;

[0042] Fig.14 This is a flow chart of a battery detection method according to some embodiments of the present application.

[0043] Description of reference numerals:

[0044] 100, battery to be tested; 101, first surface; 1011, first side; 1012, second side; 1013, third side; 1014, fourth side; 200, carrying platform; 300, radiation detector; 301, radiation source; 3011, first radiation source; 3012, second radiation source; 302, detector; 3021, first detector; 3022, second detector; 400, annular guide rail; 401, first part; 402, second part. DETAILED DESCRIPTION

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

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

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

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

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of 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.

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

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

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

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

[0054] 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.

[0055] 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.

[0056] In the related art, when inspecting a battery, the radiation source corresponds to the middle of the battery. Since the sides of the battery are relatively outward, the angle between the radiation emitted by the radiation source and the surface near the sides of the battery is small, resulting in a large distortion of the inspection image. When analyzing the inspection image, there are certain differences between the inspection image and the actual situation of the battery, and there are cases of missed detection and false detection, resulting in low accuracy of battery defect detection.

[0057] An embodiment of the present application provides a battery detection method, the method comprising: acquiring a detection image of the battery to be tested; determining defect information of the battery to be tested based on the detection image; and determining a quality detection result of the battery to be tested based on the defect information of the battery to be tested. The detection image is an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other at least twice, and in one of the relative movements between the battery to be tested and the radiation detector, the first side extends in the moving direction, and in another relative movement between the battery to be tested and the radiation detector, the second side extends in the moving direction. By moving at least twice, the influence of distortion at at least four sides can be reduced, thereby improving the detection accuracy of the entire battery to be tested.

[0058] The battery detection method disclosed in the embodiment of the present application can be used to detect batteries that have just been produced, and can also be used to detect batteries that have been used for a period of time, thereby improving the accuracy of internal battery detection and reducing the problems of missed detection and false detection.

[0059] The present application embodiment provides a battery detection method, Figure 1 This is a flow chart of a battery detection method according to some embodiments of the present application. Figure 1 , methods include:

[0060] Step S10: Acquire a detection image of the battery to be tested.

[0061] Step S20: Determine defect information of the battery to be tested based on the detection image.

[0062] Step S30: determining a quality inspection result of the battery to be tested based on the defect information of the battery to be tested.

[0063] In the embodiment of the present application, the battery 100 to be tested is a laminated battery. Figure 2 This is a schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application. Figure 3 This is a schematic diagram of the structure of the detection device of some embodiments of the present application detecting the battery to be tested. Figure 2 and Figure 3 The battery under test 100 includes a first surface 101, and the first surface 101 has a first side 1011 and a second side 1012 adjacent to each other. Exemplarily, the first surface 101 also has a third side 1013 and a fourth side 1014, the third side 1013 is adjacent to the second side 1012 and opposite to the first side 1011, and the fourth side 1014 is adjacent to the first side 1011 and opposite to the second side 1012.

[0064] The shape of the laminated battery is similar to a cuboid, and the battery 100 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 surface 101 may be one of the large faces of the battery 100 to be tested.

[0065] In some embodiments of the present application, the detection device includes a carrying platform 200 and a radiation detector 300. For example, when the detection device is used to detect the battery 100 to be tested, the battery 100 to be tested can be placed on the carrying platform 200 so that the large surface (e.g., the first surface 101) of the battery 100 to be tested is in contact with the carrying surface of the carrying platform 200, that is, the thickness direction of the battery 100 to be tested is perpendicular to the carrying surface, and then the radiation detector 300 is used to detect the battery 100 to be tested.

[0066] In the embodiment of the present application, the detection image is an image of the battery 100 to be tested collected by the radiation detector 300 when the battery 100 to be tested and the radiation detector 300 move relative to each other for at least two times. In one relative movement between the battery 100 to be tested and the radiation detector 300, the first side 1011 extends along the moving direction X, and in another relative movement between the battery 100 to be tested and the radiation detector 300, the second side 1012 extends along the moving direction X. Wherein, Figure 2 It can be understood that during one relative movement between the battery to be tested 100 and the radiation detector 300 , the first side 1011 extends along the movement direction X. Figure 3 It can be understood that in another relative movement between the battery to be tested 100 and the radiation detector 300, the second side 1012 extends along the moving direction X. Figure 2 and Figure 3 In the detection, the moving direction X can be the same or different.

[0067] In the embodiments of the present application, when the battery 100 to be tested and the radiation detector 300 move relative to each other, the battery 100 to be tested may move while the radiation detector 300 is stationary, or the radiation detector 300 may move while the battery 100 to be tested is stationary, or the battery 100 to be tested and the radiation detector 300 may move at the same time, but the moving speed of the battery 100 to be tested and the moving speed of the radiation detector 300 are different. During the relative movement between the battery 100 to be tested and the radiation detector 300, the radiation detector 300 must be able to detect the battery 100 to be tested, that is, the radiation emitted by the radiation source 301 of the radiation detector 300 must be able to pass through the battery 100 to be tested and be detected by the detector 302 of the radiation detector 300, that is, the battery 100 to be tested must pass between the radiation source 301 and the detector 302. The stationary and moving mentioned in the embodiments of the present application are both based on the ground as a reference.

[0068] The moving direction X referred to in the embodiment of the present application is the moving direction of the battery 100 to be tested relative to the radiation detector 300. When the battery 100 to be tested moves and the radiation detector 300 is stationary, the moving direction X is the moving direction of the battery 100 to be tested; when the radiation detector 300 moves and the battery 100 to be tested is stationary, the moving direction X is opposite to the moving direction of the battery 100 to be tested; when the battery 100 to be tested moves and the radiation detector 300 moves simultaneously, the moving direction X is determined according to the moving speed of the battery 100 to be tested and the moving speed of the radiation detector 300.

[0069] In the embodiments of the present application, Figure 2 and Figure 3 The radiation detector 300 shown in the figure can be the same radiation detector or different radiation detectors, that is, in the two relative movements between the battery 100 to be tested and the radiation detector 300, the same radiation detector 300 can be used to detect the battery 100 to be tested, or two radiation detectors 300 can be used to detect the battery 100 to be tested.

[0070] For example, in Figure 2In the embodiment, the first side 1011 extends along the moving direction X, and the second side 1012 intersects with the moving direction X. During the detection process, the distance between the second side 1012 and the radiation detector 300 will change. When the distance between the second side 1012 and the radiation detector 300 is the smallest, the second side 1012 moves to between the radiation source 301 and the detector 302 of the radiation detector 300. At this time, the second side 1012 is detected, so that when the ray emitted by the ray source 301 passes through the first surface 101 and the second side 1012, the angle between the ray and the first surface 101 where the second side 1012 is located is as close to 90° as possible, thereby reducing the influence of distortion on the detection result as much as possible, and improving the accuracy of defect detection on the second side 1012. Similarly, when the fourth side 1014 moves to between the radiation source 301 and the detector 302 of the radiation detector 300 , the fourth side 1014 is detected, which can improve the accuracy of defect detection on the fourth side 1014 .

[0071] Figure 2 In the test shown, not only the accuracy of defect detection of the second side 1012 and the fourth side 1014 can be improved, but also, since the battery 100 to be tested is movable, when any detection line in the battery 100 to be tested that is parallel to the second side 1012 moves to between the radiation source 301 and the detector 302 of the radiation detector 300, the detection line can be tested, which can also improve the detection accuracy of the detection line, that is, improve the detection accuracy of the entire battery 100 to be tested. The detection line represents a line segment formed by connecting multiple detection points on the first surface 101.

[0072] In the embodiments of the present application, Figure 2 For example, the position can be adjusted so that the center line of the ray emitted by the ray source 301 passes through the midpoint of the second side 1012. When the fourth side 1014 is detected, the center line of the ray emitted by the ray source 301 can also pass through the midpoint of the fourth side 1014.

[0073] In the embodiments of the present application, Figure 2 For example, during detection, the angle between the ray and the first surface 101 at the center of the second side 1012 is equal to 90°, that is, the distortion at the center of the second side 1012 is the smallest, but the distortion at the endpoints on both sides of the second side 1012 is large, that is, the distortion of the first side 1011 and the third side 1013 is large. Therefore, in the embodiment of the present application, at least two movements are set. Figure 3In this way, the distortion of the first side 1011 and the third side 1013 can be reduced, the accuracy of defect detection of the first side 1011 and the third side 1013 can be improved, and the detection accuracy of the detection line parallel to the first side 1011 can be improved. At least through these two tests, the detection results of the battery 100 to be tested can be optimized to reduce the influence of distortion, that is, the detection accuracy of the entire battery 100 to be tested can be improved.

[0074] In the embodiments of the present application, for the introduction of improved detection accuracy of the first side 1011 and the third side 1013, refer to the above-mentioned introduction of improved detection accuracy of the second side 1012 and the fourth side 1014, and the embodiments of the present application will not be repeated here.

[0075] In the embodiments of the present application, by Figure 2 The detection scheme shown can improve the accuracy of defect detection of the second side 1012 and the fourth side 1014, as well as the detection accuracy of the detection line parallel to the second side 1012; Figure 3 The detection scheme shown can improve the accuracy of defect detection of the first side 1011 and the third side 1013, as well as the detection accuracy of the detection line parallel to the first side 1011, and realize the detection of the entire battery to be tested 100. By moving at least twice, the influence of distortion at the four sides can be reduced, thereby improving the detection accuracy of the entire battery to be tested 100.

[0076] In the embodiment of the present application, the defect information of the battery 100 to be tested includes morphological defects such as wrinkles, breaks and overlaps of the pole pieces.

[0077] In the embodiment of the present application, the quality inspection result of the battery 100 to be tested is used to indicate whether the battery 100 to be tested is qualified.

[0078] In the embodiment of the present application, if the electrode piece of the battery 100 to be tested is wrinkled or broken, a grayscale change will appear in the detection image, and the defect information of the battery 100 to be tested can be determined based on the grayscale change of the detection image.

[0079] In an embodiment of the present application, the detector 302 may be calibrated before the detection begins to reduce the error of the detected image. For example, the detector 302 needs to be calibrated before formal operation. Before calibration, it is necessary to ensure that there is no debris on the exit port of the ray source 301 and the surface of the detector 302, and there is no obstruction between the ray source 301 and the detector 302. It is required that the ray fully covers the receiving surface of the detector 302, and the grayscale value of the imaging of the detection device at this time can be adjusted to the calibration grayscale value.

[0080] In the embodiment of the present application, since the detection image is an image of the battery 100 to be tested collected by the radiation detector 300 when the battery 100 to be tested and the radiation detector 300 move relative to each other for at least two times, and in one of the relative movements between the battery 100 to be tested and the radiation detector 300, the first side 1011 extends along the movement direction X, and in another relative movement between the battery 100 to be tested and the radiation detector 300, the second side 1012 extends along the movement direction X, through at least two movements, the influence of distortion at the four sides can be at least reduced, thereby improving the detection accuracy of the entire battery 100 to be tested.

[0081] According to some embodiments of the present application, see Figure 2 and Figure 3 The battery 100 to be tested is located on the carrying platform 200 , and the radiation detector 300 includes a radiation source 301 and a detector 302 opposite to the emission port of the radiation source 301 .

[0082] Figure 4 This is a flowchart of step S10 in some embodiments of the present application. Figure 4 , step S10 comprises:

[0083] Step S11: Control the movement of the carrying platform.

[0084] Step S12: In response to the battery to be tested being located between the ray source and its corresponding detector, the ray source is controlled to emit rays that pass through the battery to be tested and project to the detector.

[0085] Step S13: determining a detection image of the battery to be tested based on the rays received by the detector.

[0086] In the embodiment of the present application, the radiation source 301 of the radiation detector 300 emits radiation that is penetrating. Materials of different thicknesses have different degrees of attenuation of radiation, so that the amount of radiation detected by the detector 302 of the radiation detector 300 is different. There is a layer of photoluminescent material inside the detector 302. After receiving the radiation, 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 to represent the image formed by the light and dark contrast on the image. After the radiation passes through the detected object, there will be a certain attenuation. The more radiation that passes through, the more light signals the photosensitive material emits, and the brighter the area is on the final image. On the contrary, the fewer radiation that passes through, the darker the area is on the image.

[0087] In the implementation of the present application, the volume of the battery to be tested 100 is relatively small, and it is more convenient to control the movement of the battery to be tested 100 than to control the movement of the radiation detector 300 .

[0088] In an embodiment of the present application, the carrying platform 200 is movable, and the carrying platform 200 is used to place the battery 100 to be tested, so as to facilitate the movement of the battery 100 to be tested. The moving trajectory of the carrying platform 200 passes between the radiation source 301 and the detector 302, so that the radiation emitted by the radiation source 301 can pass through the battery 100 to be tested on the carrying platform 200 and be received by the detector 302, thereby realizing the detection of the battery 100 to be tested.

[0089] In the embodiment of the present application, the battery 100 to be tested can be grabbed by a manipulator onto a carrying platform 200, and the carrying platform 200 moves the battery 100 to the testing station. In the process of the manipulator grabbing the battery 100 to be tested, the accuracy of the grabbing position needs to be ensured to ensure the quality of subsequent imaging and provide more accurate original information for subsequent processing.

[0090] 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 100 to be tested during the gripping process. A limit block can be provided on the carrying platform 200 to enhance the stability of the battery 100 to be tested during the entire mechanical movement process.

[0091] In the embodiment of the present application, the movement of the battery 100 to be tested is controlled by controlling the movement of the carrying platform 200, which is more convenient. When the battery 100 to be tested is located between the ray source 301 and the detector 302, when performing defect detection on the battery 100 to be tested, the angle between the ray and the surface where the detection point of the battery 100 to be tested is located can be as close to 90° as possible, thereby reducing the distortion in the detection image, making the detection image closer to the actual situation of the battery 100 to be tested, and performing defect detection on the corners of the battery 100 to be tested through the detection image, so that the defect detection inside the battery 100 to be tested is more comprehensive and the detection accuracy is improved.

[0092] According to some embodiments of the present application, Figure 5 This is a schematic diagram of the structure of a detection device detecting a battery to be tested in some embodiments of the present application. Figure 6 This is a schematic diagram of the structure of the detection device of some embodiments of the present application detecting the battery to be tested. Figure 5 and Figure 6 The detection device also includes an annular guide rail 400, the carrying platform 200 is connected to the annular guide rail 400, the annular guide rail 400 includes a first part 401 and a second part 402 connected to each other, the extension direction of one of the first part 401 and the second part 402 is parallel to the extension direction of the first side 1011, and the extension direction of the other of the first part 401 and the second part 402 is parallel to the extension direction of the second side 1012.

[0093] In an embodiment of the present application, step S11 includes:

[0094] Step S111: Control the annular guide rail to operate.

[0095] In the embodiment of the present application, the shape of the annular guide rail 400 is similar to a rounded rectangle. The annular guide rail 400 rotates cyclically during operation. The first portion 401 and the second portion 402 may correspond to two adjacent sides of the rounded rectangle, that is, the extension direction of the first portion 401 and the extension direction of the second portion 402 are different. Figure 5 and Figure 6 The rotation direction of the middle annular guide rail 400 is A.

[0096] In the embodiment of the present application, the extension direction of one of the first part 401 and the second part 402 is parallel to the extension direction of the first side 1011, and the extension direction of the other of the first part 401 and the second part 402 is parallel to the extension direction of the second side 1012, which means that in the same movement of the battery 100 to be tested, the extension direction of the first part 401 and the extension direction of the second part 402 are different. Figure 5 and Figure 6 For example, the directions of the two movements of the battery 100 to be tested are different. Figure 5 In the first movement of the battery 100 to be tested (for example, the moving direction X of the battery 100 to be tested is parallel to the extending direction of the first portion 401), the extending direction of the first portion 401 is parallel to the extending direction of the first side 1011, and the extending direction of the second portion 402 is parallel to the extending direction of the second side 1012; for example, Figure 6 During the second movement of the battery 100 under test (for example, the movement direction X of the battery 100 under test is parallel to the extension direction of the second portion 402 ), the extension direction of the first portion 401 is parallel to the extension direction of the second side 1012 , and the extension direction of the second portion 402 is parallel to the extension direction of the first side 1011 .

[0097] In an embodiment of the present application, the extension direction of the first part 401 and the extension direction of the second part 402 can be adjusted according to the moving direction X of the battery 100 to be tested, so that the extension direction of the first part 401 and the extension direction of the second part 402 match the moving direction X of the battery 100 to be tested twice.

[0098] In the embodiment of the present application, the circular guide rail 400 is provided to control the movement of the battery 100 to be tested, so that the moving direction X of the battery 100 to be tested can be different in two movements, which is more convenient.

[0099] In the embodiment of the present application, the carrying platform 200 may also be a conveyor belt, and the battery to be tested 100 may be placed on the conveyor belt. Alternatively, the carrying platform 200 is connected to the annular guide rail 400, and the carrying platform 200 may move with the annular guide rail 400. When the conveyor belt or the annular guide rail 400 moves, the battery to be tested 100 located on the conveyor belt or the annular guide rail 400 is driven to move, so that continuous detection can be achieved and detection efficiency can be improved.

[0100] According to some embodiments of the present application, see Figure 5 and Figure 6 The ray source 301 includes a first ray source 3011 and a second ray source 3012 which are arranged at an interval, the detector 302 includes a first detector 3021 and a second detector 3022, the first detector 3021 is opposite to the exit port of the first ray source 3011, the second detector 3022 is opposite to the exit port of the second ray source 3012, the first part 401 is located between the first detector 3021 and the first ray source 3011, and the second part 402 is located between the second detector 3022 and the second ray source 3012. Figure 5 and Figure 6 The detection device is only an example, and only the annular guide rail 400, the carrying platform 200, the first ray source 3011, the second ray source 3012, the first detector 3021 and the second detector 3022 are shown, and other components are not shown, for example, the fixed components are not shown.

[0101] Figure 7 This is a flowchart of step S12 in some embodiments of the present application. Figure 7 , step S12 comprises:

[0102] Step S121: in response to the battery to be tested being located between the first ray source and the first detector, controlling the first ray source to emit rays that pass through the battery to be tested and project to the first detector.

[0103] Step S122: in response to the battery to be tested being located between the second ray source and the second detector, controlling the second ray source to emit rays that pass through the battery to be tested and project to the second detector.

[0104] In an embodiment of the present application, the first ray source 3011 and the first detector 3021 are matched to inspect the battery 100 under test during the first movement of the battery 100 under test, and the second ray source 3012 and the second detector 3022 are matched to inspect the battery 100 under test during the second movement of the battery 100 under test.

[0105] In the embodiments of the present application, Figure 5For example, by adjusting the position, when the first ray source 3011 detects the second side 1012, the center line of the ray emitted by the first ray source 3011 passes through the midpoint of the second side 1012. Figure 6 For example, when the second ray source 3012 detects the first side 1011 , the center line of the ray emitted by the second ray source 3012 passes through the midpoint of the first side 1011 .

[0106] In the embodiment of the present application, the electron lens focuses the electron beam to a point on the target as the ray focus.

[0107] In the embodiment of the present application, the first ray source 3011 and the second ray source 3012 may be located on the same side of the carrying platform 200 as the battery to be tested 100 .

[0108] In the embodiment of the present application, the first ray source 3011 and the first detector 3021 are set to detect the battery 100 to be tested during the first movement, and the second ray source 3012 and the second detector 3022 are set to detect the battery 100 to be tested during the second movement, that is, different ray sources 301 and detectors 302 are used for detection in the two movements of the battery 100 to be tested, so that the ray source 301 and the detector 302 do not need to move with the battery 100 to be tested, which is more convenient. At the same time, continuous detection can be achieved, and the detection efficiency is higher.

[0109] According to some embodiments of the present application, Figure 8 This is a flowchart of step S13 in some embodiments of the present application. Figure 8 , step S13 comprises:

[0110] Step S131: determining a first detection image of the battery to be tested based on the rays received by the first detector.

[0111] Step S132: determining a second detection image of the battery to be tested based on the rays received by the second detector.

[0112] Step S133: Determine a detection image based on the first detection image and the second detection image.

[0113] In the embodiment of the present application, the rays emitted by the first ray source 3011 pass through the battery 100 under test moving along the first direction and are received by the first detector 3021. A first detection image of the battery 100 under test moving along the first direction can be determined based on the rays received by the first detector 3021. The rays emitted by the second ray source 3012 pass through the battery 100 under test moving along the second direction and are received by the second detector 3022. A second detection image of the battery 100 under test moving along the second direction can be determined based on the rays received by the second detector 3022.

[0114] In the embodiment of the present application, there is no order between the above-mentioned step S131 and step S132. Step S132 can be performed simultaneously with step S131, or step S132 can be performed before step S131, or step S132 can be performed after step S131.

[0115] In an embodiment of the present application, the first detector 3021 receives rays emitted by the first ray source 3011 of the battery 100 to be tested during the first movement, and the second detector 3022 receives rays emitted by the second ray source 3012 of the battery 100 to be tested during the second movement. The two rays are imaged respectively by the two ray sources 301 and the two detectors 302 without interfering with each other.

[0116] In the above embodiment, the carrying platform 200 is connected to the annular guide rail 400, and the movement of the carrying platform 200 is controlled by the annular guide rail 400, that is, the moving direction X of the carrying platform 200 in the two movements is intersecting. In other implementations, the moving direction X of the carrying platform 200 in the two movements can be parallel.

[0117] According to some embodiments of the present application, the carrying platform 200 is rotatable, the rotation center axis of the carrying platform 200 is perpendicular to the surface of the carrying platform 200, and the rotation angle of the carrying platform 200 is greater than or equal to the angle between the first side 1011 and the second side 1012.

[0118] Fig. 9 This is a flowchart of step S11 in some embodiments of the present application. Fig. 9 , step S11 comprises:

[0119] Step S112: controlling the first side of the battery to be tested to extend along the first direction.

[0120] Step S113: controlling the carrying platform to move along the first direction.

[0121] Step S114: Control the support platform to rotate so that the second side edge of the battery to be tested extends along a second direction, wherein the first direction is parallel to the second direction but in opposite directions.

[0122] Step S115: controlling the carrying platform to move along the second direction.

[0123] In the embodiment of the present application, during the testing of the battery 100 by the above method, the movement directions X of the two movements of the battery 100 are parallel but opposite, that is, the carrying platform 200 has only one movement track.

[0124] In the embodiment of the present application, the moving direction X of the battery 100 to be tested can be the same in the two movements by rotating the carrying platform 200, but the relative position between the radiation detector 300 and the battery 100 to be tested is changed, so that the radiation detector 300 can obtain the detection images of the battery 100 to be tested in two different movement processes. That is, the detection images of the battery 100 to be tested in two different movement processes can be obtained by one radiation detector 300, and the moving track of the carrying platform 200 is shorter, so that the occupied volume of the entire detection device is smaller.

[0125] According to some embodiments of the present application, the radiation source 301 includes an integrated radiation source.

[0126] In some implementations of the present application, the first ray source 3011 and the second ray source 3012 may be ray sources of different rays, for example, one of the first ray source 3011 and the second ray source 3012 may be an X-ray source, and the other of the first ray source 3011 and the second ray source 3012 may be an α-ray source; or one of the first ray source 3011 and the second ray source 3012 may be an α-ray source, and the other of the first ray source 3011 and the second ray source 3012 may be a β-ray source, or other combinations, which are not limited to the embodiments of the present application.

[0127] Exemplarily, one of the first ray source 3011 and the second ray source 3012 may be an integrated ray source; or both of the first ray source 3011 and the second ray source 3012 may be an integrated ray source.

[0128] Exemplarily, the first ray source 3011 and the second ray source 3012 can both be closed-tube integrated X-ray tubes. The higher the voltage of the X-ray source, the better the penetration, and the thicker the number of layers that can be detected; the smaller the diameter of the ray source focus, the greater the magnification, the higher the image resolution, and the clearer the detected image. The voltage of the X-ray source and the diameter of the ray source focus can be selected according to the detection requirements.

[0129] The integrated radiation source has a low rework rate, high stability, small size, and simple later maintenance. The radiation source is set as an integrated radiation source to improve the reliability of the detection device.

[0130] According to some embodiments of the present application, the detector 302 includes a TDI (Time Delay Integration) detector.

[0131] In one implementation of the present application, the first detector 3021 and the second detector 3022 may be the same detector, for example, one of the first detector 3021 and the second detector 3022 is a flat panel detector and the other is a TDI detector; or both the first detector 3021 and the second detector 3022 are TDI detectors.

[0132] The TDI detector is a linear image sensor. By aligning the pixel rows of the image sensor perpendicular to the direction of movement of the object to be detected, high-speed, high-resolution image acquisition is achieved. The TDI detector can convert the received radiation energy into a recordable electrical signal. By measuring the amount of radiation received by the TDI detector, an electrical signal proportional to the amount of radiation is generated, thereby forming a corresponding image. Exemplarily, the TDI detector may include three parts: a radiation conversion module, a photoelectric conversion module, and a signal readout and transmission module. During the process of the detection device detecting the battery 100 to be tested, the battery 100 to be tested is placed in the radiation radiation area of ​​the radiation source 301. The radiation emitted by the radiation source 301 is emitted from the radiation irradiation window. The emitted radiation passes through the battery 100 to be tested and is projected to the TDI detector. The TDI detector receives the radiation passing through the battery 100 to be tested and images the battery 100 to be tested.

[0133] When the object to be detected moves, the TDI detector will calculate the integration time of each row of pixels according to the speed of the object to be detected and the number of pixel rows, thereby dividing the image of the object to be detected into multiple rows. When the rays pass through each row of pixels, the relevant circuit will add the charge of the pixels in that row to the charge of the pixels in the previous row, thereby obtaining the charge value of the sum of the current pixel and the pixels in the previous row. In this way, when the charge values ​​of all rows of pixels are added together, the detection image of the fast-moving object to be detected can be obtained.

[0134] In the related art, since the radiation source 301 emits a conical light beam, when the battery 100 to be tested is tested, the edge position of the battery 100 to be tested will be severely distorted. Since the imaging width of a single row of pixels of the TDI detector is narrow, the radiation is almost irradiated vertically during imaging. Therefore, for the part parallel to the pixel row of the TDI detector, the effect of improving edge distortion is more obvious.

[0135] The imaging effect of TDI detector is better, making the detected image closer to the actual situation, which can further improve the detection accuracy. At the same time, TDI detector can output high-quality images even in dark places, which can also improve the detection accuracy.

[0136] For example, a TDI detector includes N rows of pixels (which can be understood as N rows of sensing areas). Each time the object to be detected passes through a single row of sensing areas, an imaging signal is generated. Finally, the imaging signals of each row of sensing areas are superimposed and enhanced. The more rows of sensing areas in the TDI detector, the better the signal enhancement effect and the better the detection image obtained.

[0137] The embodiment of the present application can increase the number of integration times and reduce the acquisition time by designing the number of sensing areas of the TDI detector. At the same time, combined with the continuous movement of the battery 100 to be tested, continuous scanning of the battery 100 to be tested is achieved to improve the detection efficiency.

[0138] In the embodiments of the present application, since the TDI detector can output high-quality images even in darker places, the TDI detector can be used to increase the scanning speed accordingly under the premise of limiting the radiation intensity, thereby improving efficiency; or reduce the radiation intensity under constant speed scanning to save resources and reduce costs.

[0139] According to some embodiments of the present application, Fig.10 This is a flowchart of step S10 in some embodiments of the present application. Fig.10 , step S10 comprises:

[0140] Step S14: controlling the radiation detector to collect an original image including the battery to be tested.

[0141] Step S15: Process the original image to obtain a detection image of the battery to be tested.

[0142] In an embodiment of the present application, the original image may be a fused image of two images acquired during two movements.

[0143] In an embodiment of the present application, the original image is an unprocessed image, and the battery 100 to be tested in the image is not clear enough. After processing multiple original images, the battery 100 to be tested in the image becomes clearer and defects of the battery 100 to be tested are more easily identified.

[0144] According to some embodiments of the present application, Fig.11 This is a flowchart of step S15 in some embodiments of the present application. Fig.11 , step S15 comprises:

[0145] Step S151: filter the original image to obtain a filtered image.

[0146] Step S152: performing noise reduction processing on the filtered image to obtain a noise-reduced image.

[0147] Step S153: intercepting a detection area in the noise reduction image to obtain a detection image, where the detection area includes an area with the battery to be tested.

[0148] In the embodiment of the present application, the filtering process may include mean filtering process, Gaussian filtering process, etc. It is possible to remove irrelevant information in multiple original images and improve the signal-to-noise ratio of the original images.

[0149] In the embodiment of the present application, a denoised image is obtained by denoising a filtered image, and random noises such as quantum noise, aliasing noise, and electronic noise in the filtered image can be removed, thereby greatly improving the signal-to-noise ratio of the filtered image.

[0150] The original image includes not only the battery 100 to be tested but also images of other components. In an embodiment of the present application, the area with the battery 100 to be tested is cut out. This can reduce subsequent calculations on the one hand, and can also reduce the impact of errors in other components on defect detection of the battery 100 to be tested on the other hand.

[0151] According to some embodiments of the present application, Fig.12 This is a flowchart of step S20 in some embodiments of the present application. Fig.12 , step S20 comprises:

[0152] Step S21: determining the defect quantity and / or defect size of the battery to be tested based on the detection image.

[0153] Step S22: Determine defect information of the battery to be tested based on the defect quantity and / or defect size.

[0154] In the embodiment of the present application, both the defect quantity and defect size are standards for measuring defects in the battery 100 to be tested. The defect quantity is the sum of the quantities of all defects in the battery 100 to be tested, and the defect size is the size of each individual defect.

[0155] According to some embodiments of the present application, Fig.13 This is a flowchart of step S30 in some embodiments of the present application. Fig.13 , step S30 comprises:

[0156] Step S31: In response to the defect quantity being greater than a preset quantity, determining that the battery to be tested is unqualified.

[0157] In an 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 100 to be tested, and it is determined that the battery 100 to be tested is unqualified.

[0158] According to some embodiments of the present application, see Fig.13 , step S30 comprises:

[0159] Step S32: In response to any defect size being larger than a preset size, determining that the battery to be tested is unqualified.

[0160] 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 100 to be tested is relatively large, and it is determined that the battery 100 to be tested is unqualified.

[0161] According to some embodiments of the present application, see Fig.13 , step S30 further includes:

[0162] Step S33: 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.

[0163] It should be noted that the above steps are explanations of defect detection for each battery 100 to be tested. In actual applications, full-process defect detection can be implemented for multiple batteries 100 to be tested, that is, continuous detection can be implemented.

[0164] In an embodiment of the present application, the effectiveness of the detection device is calibrated before detection, and an experimental battery is made of defective samples of various sizes and types to be detected according to 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.

[0165] 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.

[0166] 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.

[0167] For example, after a defect is identified, the defect can be marked to facilitate staff to observe the defect.

[0168] According to some embodiments of the present application, the extension direction of the first side 1011 is perpendicular to the extension direction of the second side 1012 , that is, the moving direction X is perpendicular to the extension direction of the sensing area of ​​the TDI detector, which facilitates planning of the moving trajectory of the battery 100 to be tested.

[0169] Some embodiments of the present application provide a battery detection device, wherein the battery to be tested is a laminated battery, the battery to be tested includes a first surface, the first surface has a first side edge and a second side edge adjacent to each other, and the device includes: an acquisition module, a first determination module, and a second determination module. The acquisition module is configured to acquire a detection image of the battery to be tested, the detection image being an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other at least twice, in which the first side edge extends along the moving direction in one of the relative movements between the battery to be tested and the radiation detector, and the second side edge extends along the moving direction in another relative movement between the battery to be tested and the radiation detector; the first determination module is configured to determine defect information of the battery to be tested based on the detection image; and 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.

[0170] According to some embodiments of the present application, the battery to be tested is located on a supporting platform, the radiation detector includes a radiation source and a detector opposite to the emission port of the radiation source, and the acquisition module includes: a first control unit configured to control the movement of the supporting platform; a second control unit configured to control the radiation source to emit radiation that passes through the battery to be tested and projects onto the detector in response to the battery to be tested being located between the radiation source and the corresponding detector; and a first determination unit configured to determine the detection image of the battery to be tested based on the radiation received by the detector.

[0171] According to some embodiments of the present application, the supporting platform is connected to the annular guide rail, which includes a first part and a second part that are connected, an extension direction of one of the first part and the second part is parallel to an extension direction of the first side edge, and an extension direction of the other of the first part and the second part is parallel to an extension direction of the second side edge, and the first control unit is further configured to control the operation of the annular guide rail.

[0172] According to some embodiments of the present application, the ray source includes a first ray source and a second ray source that are spaced apart, the detector includes a first detector and a second detector, the first detector is opposite to an exit port of the first ray source, the second detector is opposite to an exit port of the second ray source, the first part is located between the first detector and the first ray source, and the second part is located between the second detector and the second ray source, and the second control unit includes: a first sub-control unit, configured to control the first ray source to emit rays that pass through the battery to be tested and project onto the first detector in response to the battery to be tested being located between the first ray source and the first detector; a second sub-control unit, configured to control the second ray source to emit rays that pass through the battery to be tested and project onto the second detector in response to the battery to be tested being located between the second ray source and the second detector.

[0173] According to some embodiments of the present application, a first determination unit includes: a first sub-determination unit, configured to determine a first detection image of the battery to be tested based on the rays received by the first detector; a second sub-determination unit, configured to determine a second detection image of the battery to be tested based on the rays received by the second detector; and a third sub-determination unit, configured to determine a detection image based on the first detection image and the second detection image.

[0174] According to some embodiments of the present application, the carrying platform is rotatable, the rotation center axis of the carrying platform is perpendicular to the surface of the carrying platform, the rotation angle of the carrying platform is greater than or equal to the angle between the first side and the second side, and the first control unit includes: a fourth sub-determination unit, configured to control the first side of the battery to be tested to extend along the first direction; a fifth sub-determination unit, configured to control the carrying platform to move along the first direction; a sixth sub-determination unit, configured to control the rotation of the carrying platform so that the second side of the battery to be tested extends along the second direction, wherein the first direction is parallel to the second direction but in opposite directions; and a seventh sub-determination unit, configured to control the carrying platform to move along the second direction.

[0175] According to some embodiments of the present application, the radiation source includes an integrated radiation source.

[0176] According to some embodiments of the present application, the detector includes a TDI detector.

[0177] According to some embodiments of the present application, the acquisition module includes: a third control unit configured to control the radiation detector to collect an original image including the battery to be tested; and a processing unit configured to process the original image to obtain a detection image of the battery to be tested.

[0178] According to some embodiments of the present application, the processing unit includes: a filtering subunit, configured to filter the original image to obtain a filtered image; a denoising subunit, configured to perform denoising on the filtered image to obtain a denoised image; and a capture subunit, configured to capture a detection area in the denoised image to obtain a detection image, wherein the detection area includes an area having a battery to be tested.

[0179] According to some embodiments of the present application, the first determination module includes: a second determination unit, configured to determine the number of defects and / or defect size of the battery to be tested based on the detection image; and a third determination unit, configured to determine the defect information of the battery to be tested based on the number of defects and / or defect size.

[0180] According to 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 number of defects being greater than a preset number.

[0181] According to some embodiments of the present application, the second determination module includes: a fifth determination unit configured to determine that the battery to be tested is unqualified in response to any one of the defect sizes being larger than a preset size.

[0182] According to some embodiments of the present application, an extension direction of the first side edge is perpendicular to an extension direction of the second side edge.

[0183] 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.

[0184] An embodiment of the present application also provides a method for producing a battery, the method comprising:

[0185] Step S40: 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 detection result of the battery to be tested.

[0186] The battery production method provided in the embodiment of the present application can determine the defects of the battery 100 to be tested, and can determine the quality of the battery 100 to be tested based on the defects of the battery 100 to be tested.

[0187] According to some embodiments of the present application, the method further includes:

[0188] Step S50: In response to the quality inspection result of the battery to be tested being unqualified, the unqualified battery is discarded.

[0189] In the embodiment of the present application, the quality of the battery 100 to be tested can be determined according to the quality inspection result of the battery 100 to be tested, unqualified batteries can be eliminated, and the stability of the device or equipment using the battery can be improved.

[0190] For example, batteries that pass the test can proceed to the next process.

[0191] 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.

[0192] According to some embodiments of the present application, a battery production device includes the electronic device in the above embodiments.

[0193] 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.

[0194] 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.

[0195] The embodiment of the present application also provides a battery detection method, wherein the battery 100 to be tested is a laminated battery, and the battery 100 to be tested has a first surface 101, and the first surface 101 has adjacent first side edges 1011 and second side edges 1012. The detection device includes a carrying platform 200, a radiation detector 300, and an annular guide rail 400, the carrying platform 200 is connected to the annular guide rail 400, and the annular guide rail 400 includes a first portion 401 and a second portion 402 connected to each other, the first portion 401 extends along a first direction, and the second portion 402 extends along a second direction. The radiation detector 300 includes a first radiation source 3011 and a second radiation source 3012 that are spaced apart, and a first detector 3021 and a second detector 3022. The first detector 3021 is opposite to the exit port of the first radiation source 3011, and the second detector 3022 is opposite to the exit port of the second radiation source 3012. The first part 401 is located between the first detector 3021 and the first radiation source 3011, and the second part 402 is located between the second detector 3022 and the second radiation source 3012.

[0196] Fig.14 This is a flow chart of a battery detection method according to some embodiments of the present application. Fig.14 , the method comprising:

[0197] Step S61: Control the annular guide rail to operate so that the carrying platform moves along the first direction.

[0198] The battery to be tested 100 is placed on the carrying platform 200 , and the first side 1011 extends along the first direction, and the second side 1012 extends along the second direction.

[0199] Step S62: in response to the battery to be tested being located between the first ray source and the first detector, controlling the first ray source to emit rays that pass through the battery to be tested and project to the first detector.

[0200] Step S63: determining a first detection image of the battery to be tested based on the rays received by the first detector.

[0201] Step S64: Control the annular guide rail to operate so that the carrying platform moves along the second direction.

[0202] The battery to be tested 100 is placed on the carrying platform 200 , and the first side 1011 extends along the second direction, and the second side 1012 extends along the first direction.

[0203] Step S65: in response to the battery to be tested being located between the second ray source and the second detector, controlling the second ray source to emit rays that pass through the battery to be tested and project to the second detector.

[0204] Step S66: determining a second detection image of the battery to be tested based on the rays received by the second detector.

[0205] Step S67: Determine a detection image based on the first detection image and the second detection image.

[0206] Step S68: Determine defect information of the battery to be tested based on the detection image.

[0207] Step S69: determining the quality inspection result of the battery to be tested based on the defect information of the battery to be tested.

[0208] The embodiment of the present application provides two sets of radiation sources 301 and detectors 302 to detect the first surface 101 of the battery to be tested in two directions, and can continuously and automatically collect detection images. Through algorithm filtering processing and software automatic identification and judgment functions, continuous and automatic full detection of internal electrode defects of the battery to be tested can be achieved, thereby improving detection efficiency and detection accuracy.

[0209] In the embodiment of the present application, the shooting parameters, such as the voltage and current of the X-ray tube, the frame rate, number of frames and gain of the detector 302, etc., can be adjusted according to the detection requirements.

[0210] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery detection method, wherein the battery to be tested is a laminated battery, the battery to be tested comprises a first surface, the first surface has a first side edge and a second side edge adjacent to each other, characterized in that: The method comprises: Acquire a detection image of the battery to be tested, wherein the detection image is an image of the battery to be tested captured by the radiation detector when the battery to be tested and the radiation detector move relative to each other for at least two times, wherein in one relative movement between the battery to be tested and the radiation detector, the first side extends along the moving direction, and in another relative movement between the battery to be tested and the radiation detector, the second side extends along the moving direction; 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.

2. The method according to claim 1, characterized in that The battery to be tested is located on a carrying platform, the radiation detector includes a radiation source and a detector opposite to an emission port of the radiation source, and obtaining a detection image of the battery to be tested includes: Controlling the movement of the carrying platform; In response to the battery to be tested being located between the ray source and the corresponding detector, controlling the ray source to emit rays that pass through the battery to be tested and project to the detector; A detection image of the battery to be tested is determined based on the rays received by the detector.

3. The method according to claim 2, characterized in that The bearing platform is connected to the annular guide rail, the annular guide rail includes a first part and a second part connected to each other, the extension direction of one of the first part and the second part is parallel to the extension direction of the first side edge, and the extension direction of the other of the first part and the second part is parallel to the extension direction of the second side edge, and controlling the movement of the bearing platform includes: Control the annular guide rail to work.

4. The method according to claim 3, characterized in that: The ray source comprises a first ray source and a second ray source which are arranged at intervals, the detector comprises a first detector and a second detector, the first detector is opposite to an exit port of the first ray source, the second detector is opposite to an exit port of the second ray source, the first part is located between the first detector and the first ray source, the second part is located between the second detector and the second ray source, and in response to the battery to be tested being located between the ray source and the corresponding detector, the ray source is controlled to emit rays which pass through the battery to be tested and project to the detector, comprising: In response to the battery to be tested being located between the first ray source and the first detector, controlling the first ray source to emit rays that pass through the battery to be tested and project to the first detector; In response to the battery to be tested being located between the second ray source and the second detector, the second ray source is controlled to emit rays that pass through the battery to be tested and project to the second detector.

5. The method according to claim 4, characterized in that Determining a detection image of the battery to be tested based on the rays received by the detector includes: Determine a first detection image of the battery to be tested based on the rays received by the first detector; Determining a second detection image of the battery to be tested based on the rays received by the second detector; The detection image is determined based on the first detection image and the second detection image.

6. The method according to claim 2, characterized in that The carrying platform is rotatable, the rotation center axis of the carrying platform is perpendicular to the surface of the carrying platform, the rotation angle of the carrying platform is greater than or equal to the angle between the first side and the second side, and controlling the movement of the carrying platform includes: By controlling the first side edge of the battery to be tested to extend along a first direction; Controlling the carrying platform to move along the first direction; Controlling the bearing platform to rotate so that the second side edge of the battery to be tested extends along a second direction, wherein the first direction is parallel to the second direction but in opposite directions; Control the carrying platform to move along the second direction.

7. The method according to any one of claims 2 to 6, characterized in that The ray source comprises an integrated ray source.

8. The method according to any one of claims 2 to 7, characterized in that The detector comprises a TDI detector.

9. The method according to any one of claims 1 to 8, characterized in that Acquiring a detection image of the battery to be tested, comprising: Controlling the radiation detector to collect an original image including the battery to be tested; The original image is processed to obtain a detection image of the battery to be tested.

10. The method according to claim 9, characterized in that Processing the original image to obtain the detection image includes: Performing filtering on the original image to obtain a filtered image; Performing noise reduction processing on the filtered image to obtain a noise-reduced image; A detection area in the noise reduction image is intercepted to obtain the detection image, wherein the detection area includes an area having the battery to be tested.

11. The method according to any one of claims 1 to 10, characterized in that Determining defect information of the battery to be tested based on the detection image includes: Determine the number of defects and / or defect sizes 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.

12. The method according to claim 11, 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.

13. The method according to claim 11, 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 any one of the defect sizes being larger than a preset size, the battery to be tested is determined to be unqualified.

14. A battery detection device, wherein the battery to be tested is a laminated battery, the battery to be tested comprises a first surface, the first surface has a first side edge and a second side edge adjacent to each other, characterized in that: The device comprises: an acquisition module, configured to acquire a detection image of the battery to be tested, wherein the detection image is an image of the battery to be tested collected by the radiation detector when the battery to be tested and the radiation detector move relative to each other for at least two times, wherein in one relative movement between the battery to be tested and the radiation detector, the first side extends along the moving direction, and in another relative movement between the battery to be tested and the radiation detector, the second side extends along the moving direction; A first determination module is configured to determine defect information of the battery to be tested based on a 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.

15. 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 described in any one of claims 1 to 13 to determine the quality test result of the battery to be tested.

16. The method according to claim 15, 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.

17. 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; 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 1 to 13 or the battery production method described in claim 15 or 16.

18. A battery production device, characterized in that: Comprising the electronic device as claimed in claim 17.

19. 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 1 to 13 or the battery production method according to claim 15 or 16 is implemented.

20. 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 1 to 13 or the battery production method according to claim 15 or 16.

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