Battery defect detection equipment, detection method and storage medium

Abstract

The invention provides battery defect detection equipment, a detection method and a storage medium, the battery defect detection equipment comprises a radiation source, a detector, a bearing part, a moving mechanism and a defect detection unit, the moving mechanism is used for adjusting the relative position between the bearing part and the radiation source and the detector in the direction parallel to a battery bearing surface, and the defect detection unit is used for detecting the defect of the battery. The detector is connected with the radiation source, so that optical axes of rays emitted by the radiation source are vertically projected to a plurality of target positions on the surface of the battery respectively, the detector receives the rays penetrating through the battery to obtain a plurality of initial images, the defect detection unit is connected with the detector, and the defect detection unit is used for splicing the plurality of initial images to obtain a detection image including the whole battery; and performing defect detection on the battery based on the detection image.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery defect detection device, a detection method and a storage 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] The safety and reliability of batteries are of vital importance, so it is necessary to strictly and comprehensively control the defects that may occur during the battery production process, including the detection of internal wrinkles, folded corners, pole piece damage, etc. The method of defect detection based on battery images has been increasingly widely used, but due to the impact of imaging quality, the detection effect still needs to be improved. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one object of the present application is to provide a battery defect detection device, a detection method, an electronic device, a storage medium and a computer program product to improve the detection effect of battery defects.

[0005] An embodiment of the first aspect of the present application provides a battery defect detection device, including: a radiation source; a detector; a carrying component, including a carrying surface for carrying a battery; a moving mechanism, used to adjust the relative position between the carrying component and the radiation source and the detector in a direction parallel to the carrying surface, so that the optical axes of the rays emitted by the radiation source are respectively projected vertically to multiple target positions on the battery surface, and the detector receives the rays that penetrate the battery to obtain multiple initial images; a defect detection unit, connected to the detector, the defect detection unit is used to splice the multiple initial images to obtain a detection image including the entire battery, and perform defect detection on the battery based on the detection image.

[0006] In the technical solution of the embodiment of the present application, the relative position between the supporting component and the radiation source and the detector is adjusted in a direction parallel to the battery supporting surface by a moving mechanism, so that the optical axes of the rays emitted by the radiation source are projected vertically to multiple positions on the battery surface, and the detection image of the entire battery is obtained by stitching the images taken at multiple positions, thereby reducing the influence of the battery edge image distortion, realizing effective detection of battery defects, and improving the detection effect of battery defects.

[0007] In some embodiments, the detector is a flat-panel detector with high spatial resolution, which can clearly display tiny structures and changes, and is conducive to improving the accuracy of battery defects.

[0008] In some embodiments, the size of the radiation surface of the ray source on the plane where the bearing surface is located is greater than a preset value. Therefore, the radiation surface of the ray source on the plane where the battery surface is located is large enough, further reducing the problem of distortion of the battery edge in the captured image, improving the detection effect, reducing the number of shots, and improving the detection efficiency.

[0009] In some embodiments, the plurality of target positions include a first preset point on each of two opposite sides of the battery. Since the plurality of target positions include a first preset point on each of two opposite sides of the battery, the problem of battery edge distortion can be solved more effectively.

[0010] In some embodiments, the multiple target positions also include at least one second preset point on the line between two first preset points on opposite sides of the battery. By obtaining the initial image at the two first preset points and at least one second preset point, it is possible to ensure that a detection image of the entire battery is obtained, thereby enabling comprehensive defect detection of the battery and improving the accuracy of battery defect detection.

[0011] In some embodiments, the first preset point is the midpoint of each side, so that the initial image obtained is symmetrical along the midpoint, avoiding the problem of battery distortion at one end of the side, improving the efficiency of battery defect detection, and at the same time, avoiding the first preset point deviating from the midpoint, which may require multiple shots on the side to obtain a detection image including the entire battery.

[0012] In some embodiments, the detector is a time-delayed integration detector. By acquiring a detection image including the entire battery through the time-delayed integration detector, the problem of battery edge image distortion can be better overcome, the quality of the battery detection image can be improved, and thus the detection effect of battery defects can be improved.

[0013] In some embodiments, the radiation source emits radiation to scan the battery surface in a direction parallel to a side of the battery, and the multiple target positions include multiple scanning positions of the optical axis of the radiation source on the battery surface. Scanning the battery surface by the radiation source can effectively solve the problem of distortion of the battery edge, improve the quality of the obtained battery inspection image, and thus facilitate more accurate detection of battery defects and improve the accuracy of the inspection results.

[0014] In some embodiments, the moving mechanism is used to drive the bearing member to move in a direction parallel to the bearing surface to adjust the relative position between the bearing member and the radiation source and the detector. The relative position between the bearing member and the radiation source and the detector is adjusted by driving the bearing member to move in a direction parallel to the battery surface by the moving mechanism, so that the optical axis of the radiation emitted by the radiation source at each target position is vertically projected onto the battery surface, thereby reducing the problem of battery edge distortion and improving the battery defect detection effect.

[0015] In some embodiments, the moving mechanism is used to drive the radiation source and the detector to move in a direction parallel to the supporting surface to adjust the relative position between the supporting component and the radiation source and the detector, so that the optical axis of the radiation emitted by the radiation source at each target position is projected vertically onto the battery surface, thereby reducing the problem of battery edge image distortion and improving the battery defect detection effect.

[0016] An embodiment of the second aspect of the present application provides a battery defect detection method, including: acquiring, through a detector, multiple initial images taken by projecting the optical axes of rays emitted by a ray source perpendicularly onto multiple target positions on the battery surface; splicing the multiple initial images to obtain a detection image including the entire battery; and performing defect detection on the battery based on the detection image.

[0017] Since the initial image is obtained by capturing the optical axis of the rays emitted by the radiation source through the detector and projecting them vertically onto multiple target positions on the battery surface, the problem of distortion in the battery edge image can be reduced and the battery defect detection effect can be improved. At the same time, a detection image including the entire battery is obtained by splicing multiple initial images, so that defects can be detected on the entire battery, thereby improving the accuracy and comprehensiveness of battery defect detection.

[0018] In some embodiments, the detector is a flat panel detector, and the size of the radiation surface of the ray source on the plane where the bearing surface is located is greater than a preset value. Therefore, the radiation surface of the ray source on the plane where the battery surface is located is large enough, further reducing the problem of distortion of the battery edge in the captured image, improving the detection effect, reducing the number of shots, and improving the detection efficiency.

[0019] In some embodiments, the multiple target positions include a first preset point on each of two opposite sides of the battery, the multiple initial images include a first initial image and a second initial image, and the first initial image and the second initial image are captured by the following method: the optical axis of the ray emitted by the ray source is vertically projected to the first preset point on one of the two opposite sides, and the detector receives the ray that penetrates the battery to obtain the first initial image; and the optical axis of the ray emitted by the ray source is vertically projected to the first preset point on the other of the two opposite sides, and the detector receives the ray that penetrates the battery to obtain the second initial image. Since the multiple target positions include the first preset point on each of the two opposite sides of the battery, the problem of battery edge distortion can be more effectively solved.

[0020] In some embodiments, the multiple target positions include at least one second preset point on the line between two first preset points on opposite sides of the battery, and the multiple initial images include at least one third initial image, which is obtained by taking the following method: the optical axis of the ray emitted by the ray source is vertically projected to at least one second preset point, and the detector receives the ray that penetrates the battery to obtain the third initial image. By obtaining the initial image at the two first preset points and at least one second preset point, it is possible to ensure that the detection image of the entire battery is obtained, so that the battery can be comprehensively inspected for defects, thereby improving the accuracy of battery defect detection.

[0021] In some embodiments, the detector is a time-delayed integration detector, and the multiple initial images are obtained by taking the following method: the radiation source emits radiation to scan the battery surface in a direction parallel to a side of the battery, and the detector receives the radiation that penetrates the battery to obtain multiple initial images, wherein the multiple target positions include multiple scanning positions of the optical axis of the radiation source on the battery surface. By acquiring a detection image including the entire battery through a time-delayed integration detector, the problem of distortion of the battery edge image can be better overcome, the quality of the battery detection image can be improved, and thus the detection effect of battery defects can be improved.

[0022] In some embodiments, the battery defect detection method further includes: in response to the battery detection result being unqualified, the battery is discarded or re-inspected to improve the accuracy and efficiency of battery defect detection.

[0023] An embodiment of the third aspect of the present application provides a battery defect detection device, which includes: an acquisition module for acquiring multiple initial images taken by projecting the optical axes of rays emitted by a ray source perpendicularly onto multiple target positions on the battery surface; a stitching module for stitching the multiple initial images to obtain a detection image including the entire battery; and a detection module for performing defect detection on the battery based on the detection image.

[0024] Since the detection image is obtained by taking multiple initial images based on the optical axes of the rays emitted by the ray source projected vertically onto multiple target positions on the battery surface, the problem of distortion of the battery edge image can be reduced and the battery defect detection effect can be improved. At the same time, by splicing multiple initial images to obtain a detection image including the entire battery, defect detection can be performed on the entire battery, thereby improving the accuracy and comprehensiveness of battery defect detection.

[0025] An embodiment of the fourth aspect of the present application provides a battery production system, comprising any of the above-mentioned battery testing devices.

[0026] An embodiment of the fifth aspect of the present application provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute any one of the above-mentioned battery defect detection methods.

[0027] An embodiment of the sixth aspect of the present application provides a computer-readable storage medium storing a computer program, which implements any of the above-mentioned battery defect detection methods when executed by a processor.

[0028] An embodiment of the seventh aspect of the present application provides a computer program product, including a computer program, which implements any of the above-mentioned battery defect detection methods when executed by a processor.

[0029] 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

[0030] 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.

[0031] Figure 1 A schematic diagram of a battery defect detection device in the related art;

[0032] Figure 2 A schematic diagram of the structure of a battery defect detection device according to some embodiments of the present application;

[0033] Figure 3 for Figure 2 A front view of a battery defect detection device in FIG.

[0034] Figure 4 for Figure 2 A top view of a battery defect detection device in FIG.

[0035] Figure 5 for Figure 2 A left side view of a battery defect detection device in FIG.

[0036] Figure 6 A schematic structural diagram of another battery defect detection device according to some embodiments of the present application;

[0037] Figure 7A top view of another battery defect detection device according to some embodiments of the present application;

[0038] Figure 8 A schematic structural diagram of another battery defect detection device according to some embodiments of the present application;

[0039] Fig. 9 A schematic structural diagram of another battery defect detection device according to some embodiments of the present application;

[0040] Fig.10 A schematic diagram of the structure of another battery defect detection device according to some embodiments of the present application;

[0041] Fig.11 A flowchart of a battery defect detection method according to some embodiments of the present application;

[0042] Fig.12 A flowchart of another battery defect detection method according to some embodiments of the present application;

[0043] Fig.13 This is a block diagram of the composition of a battery defect detection device according to some embodiments of the present application.

[0044] Description of reference numerals:

[0045] 1000. Defect detection equipment;

[0046] 100, ray source; 101, optical axis; 102, radiation cross section; 103, ray;

[0047] 200, detector; 300, bearing component; 400, moving mechanism; 410, fixing frame; 420, lead screw; 430, threaded sleeve;

[0048] 500. Defect detection unit;

[0049] 600, battery; 601, first preset point; 602, second preset point; 603, battery surface; 61, distortion area;

[0050] 2000, defect detection device;

[0051] 2001, acquisition module; 2002, splicing module; 2003, detection module. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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).

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The safety and reliability of batteries are of vital importance, so it is necessary to strictly and comprehensively control defects that may occur during the battery review process, including the detection of defects such as wrinkles, folded corners, and broken pole pieces inside the battery. The method of detecting defects based on battery images has become more and more widely used, but due to the influence of imaging quality, the detection effect still needs to be improved. In related technologies, X-rays can be used to obtain test images of batteries, and defect detection of batteries can be performed based on the test images, so as to detect defects such as wrinkles, folded corners, and broken pole pieces inside the battery that may occur during the production process.

[0062] Figure 1 FIG. 1 is a schematic diagram of a battery defect detection device in the related art, wherein the ray 103 forms a distortion area 61 at the edge of the battery. Figure 1 As shown, when the battery defect detection device in the related art performs defect detection, the ray 103 emitted by the ray source 100 forms a conical beam, and the detector 200 receives the ray 103 that penetrates the battery 600 to obtain a detection image of the battery 600. However, the transmission thickness of the ray 103 at the edge of the battery 600 is inconsistent, so that the obtained detection image is distorted. If the battery defect detection is performed based on the detection image, the battery defect detection effect in the distorted area 61 will be poor, thereby affecting the accuracy of the defect detection at the edge of the battery, resulting in the inability to fully guarantee the quality of the battery.

[0063] The battery defect detection equipment and detection method disclosed in the embodiments of the present application can effectively detect defects such as wrinkles, folded corners, and broken pole pieces inside the battery, reduce the risk of battery outflow, and improve the reliability and safety of the battery.

[0064] The embodiments of the present application provide a battery defect detection device and detection method, an electronic device, a storage medium and a computer program product, which can be applicable to but not limited to cylindrical batteries, soft-pack batteries, square-shell batteries, wound batteries, etc.

[0065] Figure 2 This is a schematic diagram of the structure of a battery defect detection device according to some embodiments of the present application. Figure 3 for Figure 2 The main view of the battery defect detection equipment in Figure 4 for Figure 2 A top view of the battery defect detection equipment in Figure 5 for Figure 2 Left view of the battery defect detection equipment in . Figure 6 This is a schematic diagram of the structure of another battery defect detection device according to some embodiments of the present application. Figure 7 A top view of another battery defect detection device according to some embodiments of the present application.

[0066] like Figure 2-Figure 7 As shown, the embodiment of the present application provides a battery defect detection device 1000, including a ray source 100, a detector 200, a bearing component 300, a moving mechanism 400 and a defect detection unit 500. The bearing component 300 includes a bearing surface for bearing a battery 600, and the moving mechanism 400 is used to adjust the relative position between the bearing component 300 and the ray source 100 and the detector 200 in a direction parallel to the bearing surface, so that the optical axis 101 of the ray emitted by the ray source 100 is respectively projected vertically to multiple target positions on the battery surface, the detector 200 receives the ray penetrating the battery 600 to obtain multiple initial images, and the defect detection unit 500 is connected to the detector 200, and the defect detection unit 500 is used to splice the multiple initial images to obtain a detection image including the entire battery 600, and perform defect detection on the battery 600 based on the detection image.

[0067] The battery 600 can be placed on the carrying surface of the carrying component 300. According to some embodiments of the present application, the carrying component 300 and the battery 600 can be moved in a direction parallel to the carrying surface driven by the moving mechanism 400. When the optical axis 101 of the ray emitted by the ray source 100 is vertically projected on the target position on the battery surface, the moving mechanism 400 pauses to move. At this time, the ray source 100 emits a ray 103 to the battery 600, and the detector 200 receives the corresponding ray that penetrates the battery 600 at the target position, and obtains the corresponding initial image of the target position. After the detector 200 completes the acquisition of the corresponding initial image of the target position, the moving mechanism 400 moves again, so that the optical axis 101 of the ray emitted by the ray source 100 is vertically projected on another target position on the surface of the battery 600. At this time, the ray source 100 emits a ray 103 to the battery 600, and the detector 200 again receives the corresponding ray that penetrates the battery 600 at the other target position. According to some embodiments of the present application, the defect detection unit 500 stitches the obtained multiple initial images to obtain a detection image including the entire battery 600, and the defect detection unit 500 performs defect detection on the battery 600 based on the detection image.

[0068] Among them, the number of multiple target positions is at least 2, and the number of target positions is related to the size and model of the detector 100 and the battery 600 and the size of the radiation surface of the radiation source on the battery surface. For example, when the size of the battery 600 is large, or the detection radius of the detector 100 is small, three or more shots can be taken in sequence in a direction parallel to the battery surface (from one side of the battery to the other side in sequence) to obtain a detection image including the entire battery 600.

[0069] For example, the moving mechanism 400 moves the battery 600 located on the supporting component 300 so that the optical axis 101 of the radiation emitted by the radiation source 100 faces a side edge of the battery 600 (see Figure 3), and projected vertically on the battery surface, the detector 200 obtains an initial image of the battery 600 on that side, and then the moving mechanism 400 moves the supporting component 300 in a direction parallel to the battery surface, driving the battery 600 located on the supporting component 300 to move, so that the optical axis 101 of the ray emitted by the ray source 100 is facing the other side of the battery 600, and projected vertically on the battery surface, and the detector 200 obtains another initial image of the battery 600. The defect detection unit 500 connected to the detector 200 splices multiple initial images to obtain a detection image including the entire battery 600, and performs defect detection on the battery 600 based on the detection image. In some embodiments, when the radiation surface of the ray source 100 on the battery surface is circular, the radius of the radiation surface can be greater than half the height of the battery 600, so that both sides of the battery 600 are photographed, and a detection image including the entire battery 600 can be obtained based on the two initial images obtained by shooting. In other embodiments, when the radiation surface of the ray source 100 on the battery surface is rectangular, the length or width of the radiation surface may be greater than half the height of the battery 600, so that both sides of the battery 600 are photographed, and a detection image including the entire battery 600 can also be obtained based on the two initial images obtained by the photography. The height of the battery can be the distance from the battery extending from the above-mentioned one side to the above-mentioned other opposite side, and the detection size can refer to the size of the radiation surface of the ray emitted by the ray source 100 on the plane where the battery surface is located. It should be noted that the radiation surface of the ray source 100 on the battery surface is not limited to a circle or a rectangle, for example, it can also be an ellipse.

[0070] It should be understood that see Figure 1 As shown, in the battery defect detection technology in the related art, when the battery 600 moves to the detection station, the ray 103 is aimed at the large surface (middle position) of the battery surface, and the ray 103 forms a cone light beam. The projection thickness of the cone light beam at the edge of the battery 600 is different, resulting in distortion. In the battery defect detection device 1000 of the embodiment of the present application, driven by the moving mechanism 400, the relative position between the bearing component 300 and the ray source 100 and the detector 200 is adjusted, so that the optical axis 101 of the ray emitted by the ray source 100 is vertically projected at multiple positions on the battery surface, and multiple initial images obtained at multiple positions are spliced ​​to obtain a detection image including the entire battery 600, thereby reducing the risk of distortion of the battery edge image and improving the battery defect detection effect.

[0071] The relative positions of the supporting component 300, the radiation source 100 and the detector 200 are adjusted in a direction parallel to the battery supporting surface by the moving mechanism 400, so that the optical axis 101 of the radiation emitted by the radiation source 100 is projected vertically onto multiple target positions on the battery surface, and the detection image of the entire battery is obtained by stitching images taken at multiple positions, thereby reducing the influence of battery edge image distortion, achieving effective detection of battery defects, and improving the detection effect of battery defects.

[0072] According to some embodiments of the present application, the detector 200 is a flat panel detector.

[0073] The optical axis 101 of the ray emitted by the ray source 100 is directly facing one side of the battery 600, and the optical axis 101 is parallel to one side end face of the battery 600. At this time, only half of the conical beam formed by the ray 103 emitted by the ray source 100 is projected onto the battery 600 on the supporting component 300 (see Figure 4 ). The flat panel detector receives the radiation penetrating the battery 600 to obtain an initial image corresponding to the side, that is, the initial image is obtained by projecting the optical axis of the radiation source 100 perpendicularly onto the side. Similarly, driven by the moving mechanism 400, the optical axis 101 of the radiation emitted by the radiation source 100 faces the other side of the battery 600, and the flat panel detector receives the radiation penetrating the battery 600 to obtain an initial image corresponding to the other side of the battery 600. It can be understood that the radiation cross section of the radiation beam emitted by the radiation source 103 perpendicular to the optical axis is not limited to a circle, for example, it can also be a rectangle, an ellipse, etc.

[0074] The detector 200 can be, for example, an amorphous silicon flat-panel detector, the radiation source 100 can be, but is not limited to, an X-ray source, and the moving mechanism 400 adjusts the relative position between the supporting component 300 and the X-ray source and the flat-panel detector in a direction parallel to the battery surface, so that the optical axis 101 of the X-ray emitted by the X-ray source is projected vertically to multiple target positions on the battery surface, and the defect detection unit 500 splices multiple initial images to obtain a detection image including the entire battery 600.

[0075] It should be noted that when the defect detection unit 500 forms a detection image after splicing two initial images, and has not yet obtained a detection image including the entire battery 600, an initial image can be acquired again for the target position between the two sides of the battery 600. Among them, the acquisition order of the initial image corresponding to one side of the battery 600, the initial image corresponding to the target position between the two sides, and the initial image corresponding to the other side of the battery 600 is not limited, and should not be understood as limiting the scope of the battery defect detection device 1000 of the embodiment of the present application. In some cases, the order can be adjusted, for example, the initial images corresponding to the two sides of the battery 600 are acquired first, and then the initial image of the target position corresponding to the two sides is acquired, or the moving mechanism 400 can be driven by a stepper motor and move at a constant speed, starting from one side of the battery 600, and sequentially acquiring the initial image corresponding to the one side, the initial image corresponding to the target position between the two sides, and the initial image corresponding to the other side of the battery 600.

[0076] Flat-panel detectors have high spatial resolution and can clearly display tiny structures and changes, which helps improve the accuracy of battery defects.

[0077] like Figure 4 As shown, according to some embodiments of the present application, the size of the radiation surface of the ray source 100 on the plane where the bearing surface is located is greater than a preset value.

[0078] The radiation cross section 102 of the ray source 100 perpendicular to its optical axis 101 may be circular, and the radius of the radiation surface of the ray source 100 on the plane where the battery surface is located may be greater than a preset value. The radiation cross section 102 of the ray source 100 perpendicular to its optical axis 101 may also be rectangular, and the length and / or width of the radiation surface of the ray source 100 on the plane where the battery surface is located may be greater than a preset value. In other words, the size of the radiation surface may be set according to the shape of the radiation surface.

[0079] It should be noted that, for the sake of ease of description and understanding, in the embodiments of the present application, the surface of the battery placed on the carrying surface is represented by the carrying surface of the carrying component.

[0080] It should be understood that the radiation radius of the ray source 100 on the plane where the battery surface is located is greater than the preset value. For different models of batteries 600, the preset value is related to the model of the battery 600 and the number of shots, as long as it can be ensured that the multiple initial images obtained based on the shooting can be spliced ​​to obtain a detection image including the entire battery 600. For example, when the target position of the shooting only includes the two opposite sides of the battery, the preset value can be set to be greater than half of the height of the battery (the distance extending from one of the two opposite sides to the other side) to ensure that the two initial images taken on the two opposite sides can be spliced ​​to obtain a detection image including the entire battery 600. The shooting position of the ray source and the detector in the embodiment of the present application can refer to the optical axis of the ray source vertically projected to the shooting position, and the detector receives the rays that penetrate the battery at this time to obtain the initial image corresponding to the shooting position.

[0081] Therefore, the radiation surface of the ray source on the plane where the battery surface is located is large enough, which further reduces the problem of distortion of the battery edge in the captured image, improves the detection effect, and can reduce the number of shots and improve detection efficiency.

[0082] See also Figure 4 As shown, according to some embodiments of the present application, the plurality of target positions include a first preset point 601 on each of two opposite sides of the battery 600 .

[0083] The moving mechanism 400 adjusts the relative positions between the supporting component 300 and the radiation source 100 and the detector 200 in a direction parallel to the battery supporting surface, so that the optical axes 101 of the radiation emitted by the radiation source 100 are respectively projected vertically onto the battery surface, and the optical axes 101 of the radiation emitted by the radiation source 100 are aligned with the first preset points 601 on each of the two opposite sides of the battery, and the multiple initial images obtained at the first preset points 601 on the two opposite sides of the battery are spliced ​​to obtain a detection image including the entire battery 600.

[0084] The first preset point 601 may be, for example, the center point of the side of the battery 600 , or may be a 1 / 3 or 1 / 4 point.

[0085] Since the multiple target positions include the first preset points 601 on each of the two opposite sides of the battery 600 , the moving mechanism 400 moves with reference to the multiple first preset points 601 , which can more effectively solve the problem of battery edge distortion.

[0086] See also Figure 7 As shown, according to some embodiments of the present application, the plurality of target positions further include at least one second preset point 602 located on a line between two first preset points 601 on opposite sides of the battery 600 .

[0087] When the size of the battery 600 is relatively large and the size of the radiation surface of the radiation source 100 on the plane where the battery supporting surface is located is smaller than the preset value, the two initial images obtained at the two first preset points 601 on the opposite sides of the battery 600 (i.e., the optical axis of the radiation source is vertically projected on the first preset points 601 for shooting) cannot obtain a detection image including the entire battery 600 after splicing. The detection image including the entire battery 600 is obtained after the initial image obtained at at least one second preset point 602 is spliced ​​with the initial images of the two first preset points 601.

[0088] For example, the number of target positions is 3, and a first preset point 601 is respectively provided on two opposite sides of the battery 600, and a second preset point 602 is also provided on the line connecting the two first preset points 601 on the two opposite sides of the battery 600. A plurality of initial images are respectively obtained at the two first preset points 601 and one second preset point 602, and then a detection image including the entire battery 600 is obtained after splicing.

[0089] The second preset point 602 may be, for example but not limited to, a midpoint on the line between the two first preset points 601. It is understandable that the second preset point 602 may not be located on the line between the two first preset points 601, for example, located on one side of the midpoint on the line between the two first preset points 601.

[0090] Since the multiple target positions also include at least one second preset point 602 on the line between two first preset points 601 located on opposite sides of the battery 600, by obtaining an initial image at the two first preset points 601 and at least one second preset point 602, it is possible to ensure that a detection image including the entire battery 600 is obtained, thereby enabling comprehensive defect detection of the battery 600 and improving the accuracy of battery defect detection.

[0091] See also Figure 4 and 7 As shown, according to some embodiments of the present application, the first preset point 601 is the midpoint of each side.

[0092] The moving mechanism 400 adjusts the relative position between the supporting component 300 and the radiation source 100 and the detector 200, so that the optical axis 101 of the radiation emitted by the radiation source 100 is projected vertically onto the surface of the battery, and the optical axis 101 of the radiation emitted by the radiation source 100 is aligned with the midpoint of each of the two opposite sides of the battery, and two initial images are obtained at the midpoint of each of the two opposite sides of the battery.

[0093] When the size of the radiation surface of the ray source 100 on the plane where the battery supporting surface is located is greater than a preset value, two initial images obtained at the midpoint of each of the two opposite sides of the battery 600 can obtain a detection image including the entire battery 600.

[0094] Alternatively, when the size of the radiation surface of the radiation source 100 on the plane where the bearing surface is located is smaller than a preset value, the two initial images obtained at the midpoint on each of the two opposite sides of the battery 600 cannot be spliced ​​together to obtain a detection image including the entire battery 600, and it is still necessary to set at least one second preset point 602 on the line connecting the two midpoints. After splicing the two initial images obtained at the midpoint on each side and the initial image obtained at at least one second preset point 602, a detection image including the entire battery 600 is obtained.

[0095] In some embodiments, the second preset point 602 may be located on a line connecting two midpoints.

[0096] Since the first preset point 601 is the midpoint of each side, the obtained initial image is symmetrical along the midpoint, avoiding the problem of battery distortion at one end of the side, thereby improving the efficiency of battery defect detection. At the same time, it avoids the first preset point deviating from the midpoint, which may require multiple shots on the side to obtain a detection image including the entire battery.

[0097] Figure 8 FIG. 2 is a schematic diagram of the structure of another battery defect detection device according to some embodiments of the present application, wherein the detector 200 is a delayed integration detector. Figure 8 As shown, according to some embodiments of the present application, the detector 200 is a delayed integration detector.

[0098] The TDI detector (Time Delay Integration) is an imaging technology similar to linear scanning. It has high detection efficiency and can avoid image distortion caused by illumination angle to a certain extent.

[0099] According to some embodiments of the present application, when the detector 200 is a delayed integration detector, the bearing component 300 and the battery 600 can be moved in a direction parallel to the battery bearing surface under the drive of the moving mechanism 400, and the optical axis 101 of the ray emitted by the ray source 100 is vertically projected on the battery surface, and the battery 600 can be driven by a stepper motor to move at a constant speed. The optical axis of the ray source 100 is vertically projected on the surface of the battery 600, and the optical axis moves from one side of the surface of the battery cell (for example, the side perpendicular to the height direction of the battery 600) to the other opposite side in a linear array scanning manner. The delayed integration detector synchronously receives the rays penetrating the battery 600 to obtain multiple initial images, and the multiple columns of initial images are spliced ​​to obtain a detection image including the entire battery 600. Among them, during the process of the delayed integration detector detecting imaging, the battery 600 moves at a constant speed. It can be understood that the ray source and the detector can also be driven to move synchronously by the moving mechanism 400, and the surface of the battery can also be scanned to obtain multiple initial images.

[0100] By acquiring a detection image including the entire battery 600 through a delayed integration detector, the problem of distortion of the battery edge image can be better overcome, the quality of the battery detection image can be improved, and thus the detection effect of battery defects can be enhanced.

[0101] According to some embodiments of the present application, the radiation source 100 emits radiation to scan the battery surface along a direction parallel to a side of the battery 600 , and the multiple target positions include multiple scanning positions of the optical axis 101 of the radiation source 100 on the battery surface.

[0102] The delayed integration detector receives the ray 103 of the radiation cross section 102 , wherein the ray emitted by the ray source 100 scans the battery surface along a direction parallel to a certain side of the battery 600 (eg, a side parallel to the height direction of the battery 600 ).

[0103] Starting from entering the scanning area (the area where the battery is located) from one side of the battery 600 until leaving the scanning area from the other side of the battery 600, the rays emitted by the ray source 100 continuously scan multiple scanning positions (i.e., target positions) on the surface of the battery to obtain multiple initial images corresponding to the multiple target positions, i.e., multiple initial images captured with the optical axis of the ray source perpendicular to the multiple target positions.

[0104] Scanning the battery surface through a ray source can effectively solve the problem of distortion at the battery edge and improve the quality of the obtained battery inspection image, which in turn is conducive to more accurate detection of battery defects and improves the accuracy of the inspection results.

[0105] Fig. 9 This is a schematic diagram of the structure of another battery defect detection device according to some embodiments of the present application. Fig. 9As shown, according to some embodiments of the present application, the moving mechanism 400 is used to drive the supporting component 300 to move in a direction parallel to the battery surface to adjust the relative position between the supporting component 300 and the radiation source 100 and the detector 200.

[0106] In the battery defect detection device 1000, the number of the supporting component 300, the radiation source 100 and the detector 200 can be multiple. For example, a set of battery defect detection equipment 1000 is provided with two supporting components 300, two radiation sources 100 and two detectors 200, and the supporting component 300, the radiation source 100 and the detector 200 are arranged in a group (see Fig. 9 ).

[0107] The moving mechanism 400 drives the supporting component 300 to move in a direction parallel to the battery surface, and drives the battery 600 to move to multiple target positions. For example, the moving mechanism 400 is a slide rail assembly, a part of which is fixed to the supporting component 300. Under power drive, the supporting component 300 is driven to move in a direction parallel to the battery surface (refer to the moving direction in the figure), and drives the battery 600 to adjust the relative position between the supporting component 300 and the radiation source 100 and the detector 200 through the moving mechanism 400, so that the optical axis 101 of the radiation emitted by the radiation source 100 is vertically projected to multiple target positions on the battery surface.

[0108] When inspecting the battery 600, since there can be multiple supporting components 300, radiation sources 100 and detectors 200, the battery defect inspection device 1000 can inspect multiple batteries 600 located at inspection stations at the same time, thereby improving the inspection efficiency.

[0109] For example, the moving mechanism 400 is a pull wire for battery detection, and the moving direction of the pull wire is parallel to the battery surface. When the pull wire runs, it drives the supporting component 300 to move, and drives the battery 600 located on the supporting component 300 to move, thereby adjusting the relative position between the battery 600 on the supporting component 300 and the radiation source 100 and the detector 200, so that the optical axis of the radiation source 100 is perpendicular to multiple target positions on the surface of the battery 600 in sequence.

[0110] The supporting component 300 is driven to move in a direction parallel to the battery support by the moving mechanism 400, and the relative positions of the supporting component 300, the radiation source 100 and the detector 200 are adjusted so that the optical axis 101 of the radiation emitted by the radiation source 100 at each target position is projected vertically onto the battery surface, thereby reducing the problem of battery edge image distortion and improving the battery defect detection effect.

[0111] Fig.10 This is a structural diagram of another battery defect detection device in some embodiments of the present application, such as Fig.10As shown, according to some embodiments of the present application, the moving mechanism 400 is used to drive the ray source 100 and the detector 200 to move in a direction parallel to the bearing surface to adjust the relative position between the bearing component 300 and the ray source 100 and the detector 200 .

[0112] According to some embodiments of the present application, the moving mechanism 400 may include a fixing frame 410, a lead screw 420 and a threaded sleeve 430, the fixing frame 410 is respectively fixed with a radiation source 100 and a detector 200, the threaded sleeve 430 is fixed below the fixing frame 410, the lead screw 420 cooperates with the threaded sleeve 430, and under power drive, the lead screw 420 rotates to drive the threaded sleeve 430 and the fixing frame 410 to move, thereby driving the radiation source 100 and the detector 200 to move in a direction parallel to the battery surface (parallel to the bearing surface).

[0113] Taking the detector 200 as a time-delay integration detector as an example, when the battery 600 located on the bearing surface of the bearing component 300 is placed in the detection station, the lead screw 420 is driven to rotate to drive the radiation source 100 and the detector 200 to move left or right in a direction parallel to the battery surface, and the radiation starts to scan from one side of the battery 600 surface until the radiation source 100 and the detector 200 leave from the other side of the battery 600 surface. Therefore, during the scanning process, the moving mechanism 400 drives the radiation source 100 and the detector 200 to move to adjust the relative position between the bearing component 300 and the radiation source 100 and the detector 200.

[0114] Taking the detector 200 as a flat-panel detector as an example, the moving mechanism 400 drives the radiation source 100 and the detector 200 to move in sequence in a direction parallel to the battery surface to multiple target positions where the radiation source is projected vertically on the battery surface. The detector 200 receives radiation that penetrates the battery 600 to obtain multiple initial images, and the defect detection unit 500 splices the multiple initial images to obtain a detection image including the entire battery 600.

[0115] The moving mechanism 400 is used to drive the radiation source 100 and the detector 200 to move in a direction parallel to the battery surface to adjust the relative position between the supporting component 300 and the radiation source 100 and the detector 200, so that the optical axis 101 of the radiation emitted by the radiation source 100 at each target position is projected vertically onto the battery surface, thereby reducing the problem of battery edge image distortion and improving the battery defect detection effect.

[0116] Fig.11 Flowchart of a battery defect detection method according to some embodiments of the present application, such as Fig.11 As shown, the embodiment of the present application provides a battery defect detection method, comprising:

[0117] S100, acquiring, through a detector, a plurality of initial images obtained by projecting the optical axes of the rays emitted by the ray source perpendicularly onto a plurality of target positions on the surface of the battery;

[0118] S200, stitching a plurality of initial images to obtain a detection image including the entire battery; and

[0119] S300: Perform defect detection on the battery based on the detection image.

[0120] Combination Figure 2-5 As shown, the moving mechanism 400 adjusts the relative position between the supporting component 300 and the radiation source 100 and the detector 200 in a direction parallel to the battery surface. When the optical axis 101 of the radiation emitted by the radiation source 100 is vertically projected to the target position on the battery surface, the radiation 103 emitted by the radiation source 100 is vertically projected to the target position on the surface of the battery 600, and the detector 200 receives the radiation penetrating the battery 600 to obtain an initial image corresponding to the target position.

[0121] The stitching module 2002 stitches multiple initial images to obtain a detection image including the entire battery 600, and performs defect detection on the battery 600 based on the detection image. For example, the detection image including the entire battery 600 is identified to obtain defects such as wrinkles, folded corners, and broken poles inside the battery.

[0122] It should be noted that in the battery defect detection method of the embodiment of the present application, the optical axis 101 of the ray emitted by the ray source 100 is projected vertically to multiple target positions on the battery surface, and multiple initial images corresponding to the multiple target positions are obtained. The multiple initial images are spliced ​​to obtain a detection image including the entire battery 600, thereby reducing the risk of distortion of the battery edge image and improving the battery defect detection effect.

[0123] Since the initial image is obtained by capturing the optical axis 101 of the rays emitted by the ray source 100 through the detector 200 and projecting it vertically onto multiple target positions on the battery surface, the problem of battery edge image distortion can be reduced and the battery defect detection effect can be improved. At the same time, by splicing multiple initial images to obtain a detection image including the entire battery 600, defect detection can be performed on the entire battery 600, thereby improving the accuracy and comprehensiveness of battery defect detection.

[0124] According to some embodiments of the present application, the detector 200 is a flat-panel detector, and the size of the radiation surface of the ray source 101 on the plane where the bearing surface is located is greater than a preset value.

[0125] The radiation cross section of the ray source 100 perpendicular to its optical axis 101 may be, for example, circular, and the radius of the radiation surface of the ray source 100 on the plane where the battery surface is located may be greater than a preset value. The radiation cross section 102 of the ray source 100 perpendicular to its optical axis 101 may also be rectangular, and the length and / or width of the radiation surface of the ray source 100 on the plane where the battery surface is located may be greater than a preset value. In other words, the size of the radiation surface may be set according to the shape of the radiation surface. The shape of the radiation cross section of the ray source 100 is not limited to circular or rectangular, and may also be elliptical, for example.

[0126] It should be noted that, for the sake of ease of description and understanding, in the embodiments of the present application, the surface of the battery placed on the carrying surface is represented by the carrying surface of the carrying component.

[0127] It should be understood that the radiation radius of the ray source 100 on the plane where the battery surface is located is greater than the preset value. For different models of batteries 600, the preset value is related to the model of the battery 600 and the number of shots, as long as it can be ensured that the multiple initial images obtained based on the shooting can be spliced ​​to obtain a detection image including the entire battery 600. For example, when the target position of the shooting only includes two opposite sides of the battery, the preset value can be set to be greater than half of the height of the battery to ensure that the two initial images taken on the opposite sides can be spliced ​​to obtain a detection image including the entire battery 600. .

[0128] Since the size of the radiation surface of the ray source 100 on the plane where the bearing surface is located is larger than the preset value, the problem of battery edge distortion in the captured image is further reduced, the detection effect is improved, and the number of shots can be reduced, thereby improving detection efficiency.

[0129] Fig.12 This is a flowchart of another battery defect detection method according to some embodiments of the present application. Fig.12 As shown, according to some embodiments of the present application, the plurality of target positions include a first preset point on each of two opposite sides of the battery, the plurality of initial images include a first initial image and a second initial image, and the first initial image and the second initial image are obtained by taking the following method:

[0130] S110, vertically projecting the optical axis of the ray emitted by the ray source onto a first preset point on one of the two opposite sides, and receiving the ray penetrating the battery from the detector to obtain a first initial image; and

[0131] S120, vertically projecting the optical axis of the ray emitted by the ray source onto a first preset point on the other side of the two opposite sides, and receiving the ray penetrating the battery from the detector to obtain a second initial image.

[0132] Combination Figure 2-5As shown, the moving mechanism 400 adjusts the relative position between the supporting component 300 and the radiation source 100 and the detector 200 in a direction parallel to the battery surface, so that the optical axis 101 of the radiation emitted by the radiation source 100 is projected vertically onto multiple target positions on the battery surface, and the multiple target positions include the first preset point 601 on each of the two opposite sides of the battery at which the optical axis 101 of the radiation emitted by the radiation source 100 is aligned.

[0133] For example, the optical axis 101 of the ray emitted by the ray source 100 is vertically aligned with the first preset point 601 on one side of the battery 600, and the ray 103 forms a circular radiation cross section 102 at the first preset point 601, and the detector 200 receives the ray that penetrates the battery 600 to obtain a first initial image. The moving mechanism 400 adjusts the relative position between the bearing component 300, the ray source 100, and the detector 200, so that the optical axis 101 of the ray emitted by the ray source 100 is vertically projected on the first preset point 601 on the other side of the two opposite sides, and the detector 200 receives the ray that penetrates the battery 600 to obtain a second initial image.

[0134] Since the multiple target positions include the first preset point 601 on each of the two opposite sides of the battery 600 , the problem of battery edge distortion can be solved more effectively.

[0135] According to some embodiments of the present application, the plurality of target positions include at least one second preset point 602 located on a line between two first preset points 601 on opposite sides of the battery 600, and the plurality of initial images include at least one third initial image, which is obtained by taking the at least one third initial image by the following method:

[0136] The optical axis 101 of the ray emitted by the ray source 100 is vertically projected onto at least one second preset point, and the detector 200 receives the ray that penetrates the battery 600 to obtain a third initial image.

[0137] For example, when the battery size is large and the radiation radius of the ray source 100 on the plane where the battery surface is located is smaller than the preset value, the optical axis of the ray source is perpendicular to the two first preset points 601 projected onto the opposite sides of the battery 600. The two initial images obtained after stitching cannot obtain a detection image including the entire battery 600. Therefore, at least one second preset point 602 can be added in the middle area of ​​the battery surface to obtain a corresponding third initial image at at least one second preset point 602, so that the detection image including the entire battery 600 can be obtained after stitching the multiple initial images obtained by shooting.

[0138] In some embodiments, the optical axis 101 of the ray emitted by the ray source 100 is projected vertically onto at least one second preset point 602, the detector 200 receives the ray that penetrates the battery 600 to obtain a third initial image, and the multiple initial images taken at the multiple first preset points 601 and the second preset points 602 are spliced ​​to obtain a detection image including the entire battery 600.

[0139] By obtaining an initial image at two first preset points 601 and at least one second preset point 602, it is possible to ensure that a detection image including the entire battery 600 is obtained, thereby enabling comprehensive defect detection of the battery 600 and improving the accuracy of battery defect detection.

[0140] According to some embodiments of the present application, the detector 200 is a time-delay integration detector, and the multiple initial images are captured by the following method:

[0141] The radiation source 100 emits radiation that scans the battery surface along a direction parallel to a side of the battery 600, and the detector 200 receives the radiation that penetrates the battery 200 to obtain multiple initial images, wherein the multiple target positions include multiple scanning positions of the optical axis 101 of the radiation source 100 on the battery surface.

[0142] According to some embodiments of the present application, when the detector 200 is a delayed integration detector, the bearing component 300 and the battery 600 can be moved in a direction parallel to the battery bearing surface under the drive of the moving mechanism 400, and the optical axis 101 of the ray emitted by the ray source 100 is vertically projected on the battery surface, and the battery 600 can be driven by a stepper motor to move at a constant speed. The optical axis of the ray source 100 is vertically projected on the surface of the battery 600, and the optical axis moves from one side of the surface of the battery cell (for example, the side perpendicular to the height direction of the battery 600) to the other opposite side in a linear array scanning manner. The delayed integration detector synchronously receives the rays penetrating the battery 600 to obtain multiple initial images, and the multiple columns of initial images are spliced ​​to obtain a detection image including the entire battery 600. Among them, during the process of the delayed integration detector detecting imaging, the battery 600 moves at a constant speed. It can be understood that the ray source and the detector can also be driven to move synchronously by the moving mechanism 400, and the surface of the battery can also be scanned to obtain multiple initial images.

[0143] By acquiring a detection image including the entire battery through a delayed integration detector, the problem of distortion of the battery edge image can be better overcome, the quality of the battery detection image can be improved, and thus the detection effect of battery defects can be enhanced.

[0144] According to some embodiments of the present application, the battery defect detection method further includes:

[0145] In response to the test result of the battery being unqualified, the battery is rejected or re-tested.

[0146] During the battery defect detection process, there may be improper operation or accidental equipment failure, which may affect the accuracy of the test results. At this time, the batteries with unqualified test results can be re-inspected to reduce the risk of misjudgment due to accidental factors (equipment failure, improper operation).

[0147] Alternatively, the batteries 600 with unqualified test results may be discarded to improve the reliability and test efficiency of the batteries 600 .

[0148] By rejecting or re-inspecting the batteries 600 with unqualified test results, the accuracy of battery defect detection is improved.

[0149] Fig.13 This is a block diagram of the composition of a battery defect detection device in some embodiments of the present application, such as Fig.13 As shown, an embodiment of the present application provides a battery defect detection device 2000, which includes an acquisition module 2001, a stitching module 2002 and a detection module 2003, wherein the acquisition module 2001 is used to acquire multiple initial images captured by projecting the optical axes of the rays emitted by the ray source perpendicularly onto multiple target positions on the battery surface, the stitching module 2002 is used to stitch the multiple initial images to obtain a detection image including the entire battery, and the detection module 2003 is used to perform defect detection on the battery based on the detection image.

[0150] Combination Figure 2-Figure 5 As shown, when the optical axis 101 of the ray emitted by the ray source 100 is vertically projected onto the target position on the battery surface, the ray source 100 emits a ray 103 to project onto the battery 600, and the detector 200 receives the ray that penetrates the battery 600. The acquisition module 2001 acquires multiple initial images obtained by photographing the optical axis 101 of the ray emitted by the ray source 100 vertically projected onto multiple target positions on the battery surface. The splicing module 2002 splices the multiple initial images to obtain a detection image including the entire battery 600. The detection module 2003 is used to perform defect detection on the battery 600 based on the detection image, for example, to identify the detection image including the entire battery 600, so as to obtain defects such as wrinkles, folded corners, and broken pole pieces inside the battery.

[0151] Since the detection image is obtained by taking multiple initial images based on the optical axes of the rays emitted by the ray source projected vertically onto multiple target positions on the battery surface, the problem of distortion of the battery edge image can be reduced and the battery defect detection effect can be improved. At the same time, by splicing multiple initial images to obtain a detection image including the entire battery, defect detection can be performed on the entire battery, thereby improving the accuracy and comprehensiveness of battery defect detection.

[0152] Some embodiments of the present application provide a battery production system, including the battery testing device in the above embodiments. It is understandable that in addition to the battery testing device, the battery production system may also include winding equipment, injection equipment, formation equipment, etc.

[0153] Some embodiments of the present application provide an electronic device, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery defect detection method in the above-mentioned embodiment.

[0154] Some embodiments of the present application provide a computer-readable storage medium storing a computer program, which implements the battery defect detection method in the above-mentioned embodiment when the computer program is executed by a processor.

[0155] Some embodiments of the present application provide a computer program product, including a computer program, which, when executed by a processor, implements the battery defect detection method in the above-mentioned embodiment.

[0156] In order to better understand the battery defect detection method and the detection device 1000 of the embodiment of the present application, the detector 200 is specifically described as a flat panel detector and a TDI detector below.

[0157] (1) When the detector 200 is a flat panel detector, Figure 2 As shown, the optical axis of the radiation source 100 is aligned with the midpoint of one side of the battery 600 to take the first picture. For example, the mobile radiation source 10 and the detector 200 are driven to move along the height direction of the battery by a moving mechanism, or the supporting component 300 is driven to move along the height direction of the battery by a moving mechanism to drive the battery 600 to move, so that the optical axis 101 of the radiation emitted by the radiation source 100 can be vertically projected onto the target position on the battery surface.

[0158] Thereafter, the optical axis of the radiation source 100 is aligned with the midpoint of the other side opposite to the battery 600 to take a second picture. For example, after the first picture is completed, the mobile radiation source 10 and the detector are driven to move along the height direction of the battery again by the moving mechanism, or the supporting component 300 is driven to move along the height direction of the battery by the moving mechanism to drive the battery 600 to move, so that the optical axis of the radiation source 100 is aligned with the midpoint of the other side of the battery to take a second picture.

[0159] By configuring the radiation source 100 so that the radius of the radiation surface on the plane where the battery surface is located is greater than half the height of the battery, the inspection image formed by stitching the initial images of the two shots can include the entire battery, thereby performing defect inspection on the entire battery.

[0160] After completing two photos, the algorithm is used to identify whether the image has defects such as wrinkles, folds, and damages on the electrode. After the identification is completed, the result images are displayed separately or the repeated parts of the image are cut and merged for display, or the original image is cut and spliced ​​before the algorithm is identified, and then the result image is displayed. For example, the initial image of the first photo and the image of the second photo are spliced ​​first, and the algorithm is identified from the spliced ​​image to detect battery defects. Alternatively, the algorithm is identified for the initial image of the first photo and the image of the second photo, and the battery defects are detected. After the detection is completed, the initial images are spliced ​​to form a detection image, and the detection results are output.

[0161] It should be noted that, during the first and second photographs, the optical axis 101 of the ray emitted by the ray source 100 is vertically projected onto a plurality of target positions on the battery surface, thereby reducing the risk of battery edge distortion.

[0162] (2) When the detector 200 is a TDI detector, Figure 8 As shown, the optical axis of the ray source 100 is always perpendicular to the surface of the battery 600 for line scanning. During the line scanning process, multiple initial images are acquired through the TDI detector to reduce the problem of distortion of the battery edge image.

[0163] The battery movement direction can be parallel to the height direction of the battery. The moving mechanism drives the bearing component to move in a straight line at a uniform speed along the height direction of the battery to drive the battery 600 to move synchronously. When the battery 600 passes through the detection area of ​​the TDI detector, the TDI detector starts detection until the entire battery completely leaves the detection area.

[0164] 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 defect detection device, characterized in that: include: Radiation source; detector; A bearing component, including a bearing surface for bearing a battery; A moving mechanism, used for adjusting the relative positions between the bearing component, the radiation source and the detector in a direction parallel to the bearing surface, so that the optical axes of the radiation emitted by the radiation source are respectively projected vertically onto a plurality of target positions on the battery surface, and the detector receives the radiation penetrating the battery to obtain a plurality of initial images; A defect detection unit is connected to the detector, and is used for splicing the multiple initial images to obtain a detection image including the entire battery, and performing defect detection on the battery based on the detection image.

2. The battery defect detection device according to claim 1, characterized in that: The detector is a flat panel detector.

3. The battery defect detection device according to claim 2, characterized in that: The size of the radiation surface of the ray source on the plane where the bearing surface is located is greater than a preset value.

4. The battery defect detection device according to claim 2 or 3, characterized in that: The plurality of target locations include a first preset point on each of two opposite sides of the battery.

5. The battery defect detection device according to claim 4, characterized in that: The plurality of target positions further include at least one second preset point located on a line connecting two of the first preset points on two opposite sides of the battery.

6. The battery defect detection device according to claim 4, characterized in that: The first preset point is the midpoint of each side.

7. The battery defect detection device according to claim 1, characterized in that: The detector is a time-delay integration detector.

8. The battery defect detection device according to claim 7, characterized in that: The radiation source emits radiation that scans the battery surface along a direction parallel to a certain side of the battery, and the multiple target positions include multiple scanning positions of the optical axis of the radiation source on the battery surface.

9. The battery defect detection device according to any one of claims 1 to 8, characterized in that: The moving mechanism is used to drive the bearing component to move in a direction parallel to the bearing surface, so as to adjust the relative position between the bearing component, the radiation source and the detector.

10. The battery defect detection device according to any one of claims 1 to 8, characterized in that: The moving mechanism is used to drive the ray source and the detector to move in a direction parallel to the bearing surface, so as to adjust the relative positions between the bearing component and the ray source and the detector.

11. A battery defect detection method, characterized in that: include: Acquiring, through a detector, a plurality of initial images obtained by projecting the optical axes of the rays emitted by the ray source perpendicularly onto a plurality of target positions on the surface of the battery; splicing the multiple initial images to obtain a detection image including the entire battery; as well as Defect detection is performed on the battery based on the detection image.

12. The battery defect detection method according to claim 11, characterized in that: The detector is a flat panel detector, and the size of the radiation surface of the ray source on the plane where the bearing surface is located is greater than a preset value.

13. The battery defect detection method according to claim 12, characterized in that: The multiple target positions include a first preset point on each of two opposite sides of the battery, the multiple initial images include a first initial image and a second initial image, and the first initial image and the second initial image are obtained by taking the following method: The optical axis of the ray emitted by the ray source is vertically projected onto the first preset point on one of the two opposite sides, and the detector receives the ray penetrating the battery to obtain the first initial image; as well as The optical axis of the ray emitted by the ray source is vertically projected onto the first preset point on the other side of the two opposite sides, and the detector receives the ray penetrating the battery to obtain the second initial image.

14. The battery defect detection method according to claim 13, characterized in that: The multiple target positions include at least one second preset point on a line between two first preset points on two opposite sides of the battery, and the multiple initial images include at least one third initial image, which is captured by the following method: The optical axis of the ray emitted by the ray source is vertically projected onto at least one of the second preset points, and the detector receives the ray that penetrates the battery to obtain the third initial image.

15. The battery defect detection method according to claim 11, characterized in that: The detector is a time-delay integration detector, and the multiple initial images are obtained by taking the following methods: The radiation source emits radiation that scans the battery surface in a direction parallel to a side of the battery, and the detector receives radiation that penetrates the battery to obtain the multiple initial images, wherein the multiple target positions include multiple scanning positions of the optical axis of the radiation source on the battery surface.

16. The defect detection method according to any one of claims 11 to 15, characterized in that: The battery defect detection method further includes: In response to the test result of the battery being unqualified, the battery is rejected or re-tested.

17. A battery defect detection device, characterized in that: The device comprises: An acquisition module, used for acquiring a plurality of initial images captured by projecting the optical axes of the rays emitted by the ray source perpendicularly onto a plurality of target positions on the surface of the battery; A stitching module, used for stitching the multiple initial images to obtain a detection image including the entire battery; A detection module is used to perform defect detection on the battery based on the detection image.

18. A battery production system, characterized in that: A battery testing device comprising the battery testing device according to any one of claims 1 to 10.

19. 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 defect detection method described in any one of claims 11 to 16.

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

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

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