Detection devices and battery manufacturing equipment

Abstract

This application provides a detection device and battery manufacturing equipment in the field of battery technology. The detection device includes a support frame, a radiation source, a detector, and a mounting base. The support frame includes a support arm, and both the radiation source and the detector are connected to the support arm. The detector faces the radiation source's exit port, and the mounting base is located between the radiation source and the detector. Here, the radiation source and the detector can rotate around the same rotation axis, and the rotation direction of the radiation source is the same as the rotation direction of the detector, so that when rotating, the detector remains facing the radiation source's exit port, and the mounting base is located between the radiation source and the detector. The detection device according to the embodiment of this application can detect adhesive application on the battery to be detected.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202310798420.8, entitled "Detection Device and Battery Manufacturing Equipment," filed on June 30, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of battery technology, and in particular to detection devices and battery manufacturing equipment. [Background technology]

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

[0004] A battery includes a housing and battery cells located within the housing, and the battery cells are attached to the housing with adhesive. However, due to the fluidity of the adhesive, the gap between the battery cells and the housing may not be sufficiently filled with adhesive. If the amount of adhesive applied is insufficient, the adhesive strength between the battery cells and the housing may be insufficient, affecting the stability of the battery. Therefore, how to detect the adhesive application status on a battery is a problem that needs to be solved. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the background art, and therefore, one object of the present application is to provide a detection device for detecting the application of adhesive to a battery and a battery manufacturing device.

[0006] An embodiment of a first aspect of the present application provides a detection device for detecting application of adhesive to a battery, the detection device including a support frame including a support arm, a radiation source connected to the support arm, and a detector connected to the support arm, the detector facing an exit port of the radiation source, and a mounting base located between the radiation source and the detector, the mounting base being used to place a battery to be detected, wherein the radiation source and the detector can rotate around the same rotation axis, and the rotation direction of the radiation source is the same as the rotation direction of the detector, so that when rotating, the detector is maintained facing the exit port of the radiation source, and the mounting base is located between the radiation source and the detector.

[0007] In the technical solution of the embodiment of the present application, the target battery can be scanned and detected using a radiation source, a detector, and a mounting base, and the radiation source and the detector can rotate around the same rotation axis O. When rotating, the target battery can be surrounded and detected, making the detection more comprehensive and preventing missed detection to some extent. After the target battery is detected, the adhesive application status of the target battery can be obtained based on the detection image, and adhesive application detection for the target battery can be realized.

[0008] In some embodiments, the support arm includes a C-arm, the radiation source connected to one end of the C-arm, and the detector connected to the other end of the C-arm, which can rotate around a rotation axis. By configuring the support arm as a C-arm and connecting the radiation source and the detector to two fixed ends of the C-arm, respectively, the relative positions of the radiation source and the detector do not change even when the C-arm rotates, so that the detector always faces the radiation source's exit port during rotation. The rotation of the radiation source and the detector is driven by controlling the rotation of the C-arm. Because the relative positions of the radiation source and the detector are fixed, only the C-arm needs to be rotated, and there is no need to consider the rotation speed and direction of the radiation source and the detector. However, if the radiation source and the detector are controlled independently, the rotation speed and direction of the radiation source and the detector must be considered. That is, the embodiments of the present application provide a C-arm to control the rotation of the radiation source and the detector, which is more convenient.

[0009] In some embodiments, the support frame further includes a support base and a connecting arm connected to the support base, the connecting arm having an arcuate track with the center of the arcuate track located on the rotation axis, wherein the C-arm has a protrusion on its outer arc surface that fits the arcuate track and is slidably located within the arcuate track. Connecting the support base and the C-arm through the connecting arm not only supports the C-arm, but also allows the C-arm to maintain a certain height from the ground during normal use and facilitates rotation of the C-arm.

[0010] In some embodiments, the rotation angle α of the radiation source satisfies 0°<α≦90°. The detection device detects the adhesive coating of the target battery. Because the adhesive coating of the target battery is located at the bottom of the target battery, the radiation emitted from the radiation source only needs to be directed at the bottom of the target battery during detection; the sides of the battery do not need to be detected. Furthermore, the radiation emitted from the radiation source is conical, so a single irradiation of the target battery can cover a large area, allowing the entire bottom of the target battery to be detected without rotating the radiation source by a large angle. Limiting the rotation angle of the radiation source to α≦90° allows for small rotation angles, making detection more convenient, saving time, and improving efficiency.

[0011] In some embodiments, the mounting table is movably positioned between the radiation source and the detector, and the direction of movement of the mounting table is perpendicular to the direction of extension of the rotation axis. By moving the mounting table, the cells can be detected continuously, thereby improving detection efficiency.

[0012] In some embodiments, the detection device further includes a controller, the radiation source is electrically and / or communicatively connected to the controller, and the detector is electrically and / or communicatively connected to the controller, wherein the controller is configured to control the radiation source and the detector to rotate about a rotation axis, control the radiation source to emit radiation as the radiation source rotates, transmit the radiation through the target battery located on the mounting table, and project it onto the detector, obtain a detected image of the target battery based on the radiation received by the detector, and determine adhesive application information of the target battery based on the detected image. A method according to an embodiment of the present application can detect the application of an adhesive to the target battery.

[0013] In some embodiments, when the support frame includes a support base and a connection arm, and the support arm includes a C-arm, controlling the radiation source and the detector to rotate about the rotation axis includes configuring the controller to control the C-arm to slide within the arcuate track of the connection arm. By controlling the C-arm to slide within the arcuate track of the connection arm, the C-arm can be rotated about the rotation axis O to achieve rotation of the radiation source and the detector.

[0014] In some embodiments, controlling the C-arm to slide within the arcuate track of the connection arm includes configuring the controller to control the C-arm to slide within the arcuate track along a first rotation direction and to control the C-arm to slide within the arcuate track along a second rotation direction, where the first rotation direction is opposite to the second rotation direction. During the detection process, when the C-arm rotates back and forth, the radiation source and the detector can detect the entire adhesive-coated area on the bottom surface of the battery to be detected.

[0015] In some embodiments, the target battery includes a bottom surface having an adhesive application area, and the controller is further configured to control the bottom surface of the target battery to adhere to the mounting surface of the mounting base. By adhering the bottom surface of the target battery to the mounting surface of the mounting base, the state of the target battery at the time of detection may be the same as the state when it is installed in the vehicle, which can to some extent prevent unexpected defects such as internal structural misalignment caused by leaving the target battery upright or rotating it, which may affect its reliability.

[0016] In some embodiments, when the mounting table is movable along an extension direction perpendicular to the rotation axis, the controller is further configured to control the mounting table to move along the extension direction perpendicular to the rotation axis to position the mounting table between the radiation source and the detector. By positioning the mounting table between the radiation source and the detector, radiation emitted from the radiation source can be projected onto the detector after passing through the detection target cell located on the mounting table.

[0017] In some embodiments, the step of acquiring the detected image of the target battery based on the radiation received by the detector includes collecting a plurality of original images based on the radiation received by the detector, performing three-dimensional reconstruction of the plurality of original images, acquiring a detected image of a bottom surface of the target battery, the bottom surface having an adhesive application region, and configuring the controller to determine the detected image of the target battery based on the detected image of the bottom surface. This method can acquire a clearer detected image and reduce subsequent calculations.

[0018] In some embodiments, the controller stores an adhesive application detection model, and determining adhesive application information of the target battery based on the detected image includes configuring the controller to input the detected image to the adhesive application detection model and obtain adhesive application information of the target battery output from the adhesive application detection model. The adhesive application detection model stores multiple adhesive application types, and after inputting the detected image to the adhesive application detection model, adhesive application information in the detected image can be quickly identified based on the stored adhesive application types.

[0019] In some embodiments, the training process for the adhesive detection model includes the steps of acquiring a sample detection image, which includes adhesive on a sample battery, captured under irradiation with a radiation source; marking actual adhesive information in the sample detection image; simultaneously inputting the sample detection image into the adhesive detection model to obtain predicted adhesive information for the sample battery output from the adhesive detection model; calculating a loss value based on the actual adhesive information and the predicted adhesive information; and adjusting parameters of the adhesive detection model based on the loss value. Before detection, defective samples of various sizes and types to be detected may be defined according to detection requirements, and a sample battery may be created with the actual adhesive information for the sample battery marked thereon. Next, the sample battery is detected, and the predicted adhesive information for the sample battery output from the adhesive detection model is compared with the actual adhesive information. The parameters of the adhesive detection model are continuously improved to further improve the accuracy of adhesive detection.

[0020] In some embodiments, determining adhesive application information of the target battery based on the detected image includes configuring the controller to determine a percentage of an abnormal adhesive application area of ​​the target battery based on the detected image, and to determine adhesive application information of the target battery based on the percentage of the abnormal adhesive application area. The percentage of the abnormal adhesive application area is a criterion for evaluating an abnormality in adhesive application of the target battery, and the adhesive application information of the target battery can be determined based on the percentage of the abnormal adhesive application area.

[0021] In some embodiments, the controller is further configured to determine that the battery being tested is unacceptable in response to the percentage of the adhesive-coated area being greater than a preset value, where the controller determines that the battery being tested is unacceptable because the percentage of the adhesive-coated area being greater than the preset value indicates that the adhesive applied to the battery being unacceptable, which may affect the stability of the battery being tested.

[0022] In some embodiments, the preset value is greater than or equal to 10% and less than or equal to 25%. In the battery manufacturing process, it is difficult to complete adhesive application without defects. Therefore, if the preset value is set too low, for example, less than 10%, too many batteries will be determined to be unacceptable, potentially affecting battery yield. If the preset value is set too high, for example, greater than 25%, the area of ​​the battery with adhesive application defects will increase, affecting battery reliability. Setting the preset value to greater than or equal to 10% and less than or equal to 25% can improve battery reliability while maintaining a certain level of battery yield.

[0023] An embodiment of the second aspect of the present application provides a battery manufacturing apparatus, which includes the detection device in the above embodiment.

[0024] The above description is merely an outline of the technical solution of the present application. In order to enable a clearer understanding of the technical means of the present application, which can be implemented in accordance with the content of the specification, and to make the above and other objectives, features and advantages of the present application more obvious and understandable, specific embodiments of the present application are specifically cited below. [Brief explanation of the drawings]

[0025] In the drawings, unless otherwise specified, the same reference numerals throughout the drawings represent the same or similar parts or elements. The drawings are not necessarily drawn to scale. It should be understood that the drawings only illustrate some embodiments disclosed in accordance with the present application and should not be considered as limiting the scope of the present application.

[0026] [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application.

[0027] [Figure 2] FIG. 1 is an exploded view of a battery according to some embodiments of the present application.

[0028] [Figure 3]FIG. 1 is a front view of a detection device according to some embodiments of the present application.

[0029] [Figure 4] FIG. 2 is a left side view of a detection device according to some embodiments of the present application.

[0030] [Figure 5] 1A and 1B are cross-sectional views of a connection between a connecting arm and a C-arm according to some embodiments of the present application.

[0031] [Figure 6] 1 is a front view of another state of a detection device according to some embodiments of the present application.

[0032] [Figure 7] 1 is a front view of another state of a detection device according to some embodiments of the present application.

[0033] [Figure 8] FIG. 1 is a block diagram of a detection device according to some embodiments of the present application.

[0034] [Figure 9] 4 is a control flow chart of a controller according to some embodiments of the present application.

[0035] [Figure 10] 4 is a control flow chart of a controller according to some embodiments of the present application.

[0036] [Figure 11] 4 is a control flow chart of a controller according to some embodiments of the present application.

[0037] [Figure 12] 4 is a control flow chart of a controller according to some embodiments of the present application.

[0038] [Figure 13]1 is a flowchart illustrating the training of an adhesive application detection model according to some embodiments of the present application.

[0039] [Figure 14] 4 is a control flow chart of a controller according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0040] The following detailed description will be given of the embodiments of the technical solution of the present application with reference to the drawings. The following embodiments are merely examples, and are not intended to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains, and the terms used herein are for the purpose of describing specific examples only and are not intended to be limiting of this application, and the terms "comprises" and "having" and any variations thereof in the specification and claims of this application, as well as the description of the drawings above, are intended to cover a non-exclusive "comprises."

[0042] In the description of the embodiments of the present application, technical terms such as "first," "second," etc. are intended only to distinguish different objects, but cannot be understood as indicating or implying relative importance, or as implying the number, specific order, or hierarchical relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise expressly limited, "plurality" means two or more.

[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in combination with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive and independent of or an alternative embodiment to other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiment described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is merely used to describe the relation between related objects, and indicates that three relations may exist, for example, A and / or B can indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in this specification, the character " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0045] In describing the examples of the present application, the term "plurality" means two or more (including two); similarly, "multiple groups" means two or more groups (including two groups); and "plurality" means two or more (including two).

[0046] In describing the embodiments of the present application, orientations or positional relationships indicated by technical terms such as "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are orientations or positional relationships indicated based on the drawings, and are intended merely to facilitate and simplify the description of the embodiments of the present application. They do not indicate or imply that the devices or elements shown necessarily have a specific orientation or are constructed or operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "attached," "connected," "coupled," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0048] From the viewpoint of the development of the market situation, power batteries are being applied more and more widely. Power batteries are not only applied to energy storage power systems such as hydroelectric power plants, thermal power plants, wind power plants and solar power plants, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles and electric cars, as well as military equipment and aerospace, etc. As the application fields of power batteries continue to expand, market needs also continue to increase.

[0049] As battery energy density requirements increase, the use of cell-to-pack (CTP) batteries is on the rise. CTP technology directly integrates battery cells into the battery, eliminating the need for intermediate modules, thereby reducing battery weight and volume and increasing battery energy density. Battery cells are fixed to the battery housing with adhesive. Due to differences in adhesive flowability, the air inside the housing cannot be expelled in a timely manner when the adhesive is applied. This can lead to the adhesive gradually filling the air cavities, resulting in air bubbles, or the adhesive itself may contain air bubbles. The lack of adhesive in the air bubble areas can cause the battery cells to come into direct contact with the housing, posing a risk of short circuits. Furthermore, insufficient adhesive application can result in insufficient adhesion between the battery cells and the housing. Vibration can easily cause the battery cells to detach from the housing, affecting battery reliability.

[0050] In the prior art, ultrasonic technology is used to detect batteries, but some batteries have water-cooled pipes at the bottom, which cannot be detected by ultrasonic technology.

[0051] An embodiment of the present application provides a detection device that detects a battery by emitting radiation from a radiation source, transmitting it through a battery placed on a mounting table, and projecting it onto a detector. At the same time, by rotating the radiation source and the detector, the entire battery can be detected as the radiation source and the detector rotate, thereby realizing non-destructive detection of the adhesive application status of the battery.

[0052] The detection device and battery manufacturing equipment disclosed in the embodiments of the present application may be used in a battery manufacturing process, and the detected or manufactured batteries may be used in power consuming devices such as, but not limited to, vehicles, ships, or aircraft, etc. The batteries disclosed in the present application can be used to configure the power supply system of the power consuming devices.

[0053] An embodiment of the present application provides a power consumption device that uses a battery as a power source, and the power consumption device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, an electric motorcycle, an electric car, a boat, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric boat toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0054] In the following embodiment, for ease of explanation, an example will be described in which the power consumption device of one embodiment of the present application is a vehicle 1000.

[0055] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extending vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 can function as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting the vehicle 1000, navigation, and operating power consumption needs during driving.

[0056] In some embodiments of the present application, the battery 100 can be used not only as an operating power source for the vehicle 1000, but also as a power source for the vehicle 1000 to provide driving power to the vehicle 1000 by replacing or partially replacing fuel oil or natural gas.

[0057] Referring to FIG. 2, FIG. 2 is an exploded view of a battery according to some embodiments of the present application. The battery 100 includes a housing 10 and battery cells 20, which are housed within the housing 10. Here, the housing 10 is used to provide a housing space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which are fitted over each other and jointly define a housing space for housing the battery cells 20. The second part 12 may have a hollow structure with one end open, and the first part 11 may have a plate-like structure, with the first part 11 covering the open side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodating space, or both the first part 11 and the second part 12 may have a hollow structure with one end open, with the open side of the first part 11 covering the open side of the second part 12. Of course, the housing 10 formed by the first part 11 and the second part 12 may have various shapes, such as a cylinder or a rectangular parallelepiped.

[0058] The battery 100 may include a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in series-parallel connection, where series-parallel connection means that the plurality of battery cells 20 are connected in either series or parallel. The plurality of battery cells 20 may be directly connected in series, in parallel, or in series-parallel, and then the entire plurality of battery cells 20 may be housed within the housing 10. Of course, the battery 100 may first be formed by connecting the plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting the plurality of battery modules in series, in parallel, or in series-parallel to form the entire battery module housed within the housing 10. The battery 100 may further include other structures, for example, the battery 100 may further include bus members for realizing electrical connection between the plurality of battery cells 20.

[0059] Here, each battery cell 20 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cells 20 may be cylindrical, flat, rectangular, or have other shapes.

[0060]

[0033] An embodiment of the present application provides a detection device for detecting adhesive application to a battery. Figure 3 is a front view of the detection device according to some embodiments of the present application. As shown in Figure 3, the detection device 400 includes a support frame 410, a radiation source 420, a detector 430, and a mounting base 440. The support frame 410 includes a support arm 411, and both the radiation source 420 and the detector 430 are connected to the support arm 411. The detector 430 faces the exit port of the radiation source 420. The mounting base 440 is located between the radiation source 420 and the detector 430. Here, the radiation source 420 and the detector 430 can rotate around the same rotation axis O. The rotation direction of the radiation source 420 is the same as the rotation direction of the detector 430, so that the detector 430 remains facing the exit port of the radiation source 420 during rotation. The mounting base 440 is located between the radiation source 420 and the detector 430. For ease of explanation, FIG. 3 also shows the detection target battery 500, and the mounting base 440 is used to place the detection target battery 500 thereon.

[0061] The support frame 410 may be any member for mounting the radiation source 420 and the detector 430 to improve the stability of the radiation source 420 and the detector 430. The support arm 411 is used to fix the radiation source 420 and the detector 430, and when the radiation source 420 and the detector 430 are mounted on the support arm 411, the detector 430 can face the emission port of the radiation source 420, so that the radiation emitted from the radiation source 420 can pass through the target battery 500 on the mounting table 440 and be projected onto the detector 430, thereby realizing detection of the target battery 500.

[0062] The radiation source 420 is a device for emitting detection radiation and is mainly composed of a radiation tube and a corresponding power source. The detection radiation may be X-rays or other radiation. A radiation tube, such as an X-ray tube or a gamma-ray tube, can emit the corresponding detection radiation. The radiation source 420 may be an open type (open tube) or a closed type (closed tube). In one example, the radiation source 420 is an X-ray source, and the emitted detection radiation is X-rays. When the detection radiation emitted from the radiation source 420 passes through the target battery 500, there are differences in the thickness of the unused adhesive-coated area of ​​the target battery 500, which results in different absorption rates for X-rays. Therefore, adhesive application detection can be performed based on the difference in the degree of X-ray absorption.

[0063] The radiation emitted from the radiation source 420 is all transparent, and materials of different thicknesses attenuate the radiation to different degrees, resulting in different amounts of radiation detected by the detector 430. The detector 430 contains a layer of radiation-excited luminescent material that can emit visible light signals when excited by radiation. The visible light signals are transmitted to a photoelectric converter to form electrical signals, which are then output as digital signals through an internal electrical signal transmission circuit and displayed as images, forming images with contrast between light and dark. The radiation is attenuated to a certain extent after passing through the test object; the more radiation that passes through, the more light signals the photosensitive material emits, resulting in a brighter region in the final image. Conversely, the less radiation that passes through, the darker the region in the image. The detector 430 may be a flat panel detector or a linear array detector, but the embodiments of this application are not particularly limited thereto.

[0064] The mounting base 440 may be any mounting structure, such as a tray or clamp, that can support or clamp and secure the detection target battery 500. The mounting base 440 may be fixed or movable, for example, a tray or clamping mechanism that is installed on a conveying track and moves along the conveying track. The number of detection target batteries 500 placed on the mounting base 440 may be one or more. In one example, the mounting base 440 may include multiple trays, each of which carries one or more detection target batteries 500. The detection target battery 500 may be a battery 100 that includes multiple battery cells 20.

[0065] In the embodiment of the present application, the load capacity of the mounting base 440 is greater than the weight of the detection target battery 500 that is left there.

[0066] In the embodiment of the present application, the thickness of each region of the mounting table 440 is equal, so that the influence on the detection result is reduced.

[0067] In the embodiment of the present application, the radiation source 420 and the detector 430 can rotate around the same rotation axis O, and the support arm 411 rotates to drive and rotate the radiation source 420 and the detector 430.

[0068] In the embodiment of the present application, when the radiation source 420 and the detector 430 rotate, it is necessary to ensure that the mounting base 440 is positioned between the radiation source 420 and the detector 430, so that during detection, the radiation emitted from the radiation source 420 can be projected onto the detector 430 through the target battery 500 on the mounting base 440. For example, FIG. 4 is a left side view of a detection device according to some embodiments of the present application. Referring to FIGS. 3 and 4, the rotation axis O can be positioned on the mounting surface of the mounting base 440, so that when the radiation source 420 and the detector 430 rotate, the mounting base 440 can always be positioned between the radiation source 420 and the detector 430. The radiation source 420 and the detector 430 may rotate clockwise or counterclockwise.

[0069] Here, the rotation axis O is not an actual line but a virtual line, and in FIG. 3, the rotation axis O is represented by a circle because the rotation axis O is perpendicular to the plane of the drawing.

[0070] In the detection device according to the embodiment of the present application, the radiation source 420, the detector 430, and the mounting base 440 scan and detect the target battery 500, and the radiation source 420 and the detector 430 can rotate around the same rotation axis O. During rotation, the radiation source 420 and the detector 430 can surround and detect the target battery 500, making the detection more comprehensive and preventing missed detections to some extent. After the target battery 500 is detected, the adhesive application status of the target battery 500 can be obtained based on the detection image, thereby realizing adhesive application detection for the target battery 500.

[0071] The detection device according to the embodiment of the present application can detect the target battery 500 without disassembling the target battery 500 and can achieve non-destructive detection of the adhesive application status of the target battery 500.

[0072] In some embodiments of the present application, referring to FIG. 3 , the support arm 411 includes a C-arm, the radiation source 420 is connected to one end of the C-arm, the detector 430 is connected to the other end of the C-arm, and the C-arm can rotate around a rotation axis O.

[0073] Here, the external shape of the C-arm resembles the English letter "C," both ends of the C-arm are fixed ends, and the radiation source 420 and the detector 430 are connected to the two fixed ends of the C-arm, respectively.

[0074] In the embodiment of the present application, the support arm 411 is configured as a C-arm, and the radiation source 420 and the detector 430 are respectively connected to two fixed ends of the C-arm. Therefore, even when the C-arm rotates, the relative positions of the radiation source 420 and the detector 430 do not change, and the detector 430 always faces the emission port of the radiation source 420 during rotation. The rotation of the radiation source 420 and the detector 430 is driven by controlling the rotation of the C-arm. Since the relative positions of the radiation source 420 and the detector 430 are fixed, it is only necessary to rotate the C-arm, and there is no need to consider the rotation speed and direction of the radiation source 420 and the detector 430. That is, the embodiment of the present application provides a C-arm to control the rotation of the radiation source 420 and the detector 430, which is more convenient.

[0075] 3 and 4, according to some embodiments of the present application, the support frame 410 further includes a support base 412 and a connecting arm 413, and the connecting arm 413 is connected to the support base 412. FIG. 5 is a cross-sectional view of the connection between the connecting arm and the C-arm in some embodiments of the present application. Referring to FIGS. 3 and 5, the connecting arm 413 has an arc-shaped track 4131, and the center of the arc-shaped track 4131 is located on the rotation axis O. Here, the outer arc surface of the C-arm has a protrusion 4111 that fits into the arc-shaped track 4131, and the protrusion 4111 is slidably located within the arc-shaped track 4131. It should be noted that the simplified cross-sectional view shown in FIG. 5 only shows the connection relationship between the connecting arm and the C-arm. Since the cross-sectional view shown in FIG. 5 shows a cross section of the arc-shaped track 4131, it is not possible to confirm that the arc-shaped track 4131 is arc-shaped.

[0076] In the embodiment of the present application, the support base 412 supports the C-arm, so that the C-arm can maintain a certain height from the ground during normal use, making it easy to rotate. As shown in Figure 3, the shape of the support base 412 may be a bent L-shape, so that part of the C-arm can be left in the groove of the L-shaped support base 412, which saves installation space and is advantageous for the miniaturization of the detection device 400.

[0077] The connecting arm 413 connects the C-arm and the support base 412, so that the support base 412 can support the C-arm.

[0078] 5, the cross section of the arc-shaped track 4131 is T-shaped, and the protrusion 4111 on the C-arm and the C-arm body are also T-shaped, making it difficult for the C-arm to come off after being connected to the connection arm 413. The center of the arc-shaped track 4131 is located on the rotation axis O, and part of the sliding trajectory of the C-arm overlaps with the arc-shaped track 4131, so the C-arm rotates along the rotation axis O.

[0079] In some embodiments of the present application, the connecting arm 413 has a gear, the centerline of the gear is parallel to the rotation axis O of the C-arm, and the outer surface of the C-arm has rotating teeth that mesh with the gear, so that when the gear rotates, it can drive the rotation of the C-arm. In other embodiments, the C-arm may be rotated in other ways, and the embodiments of the present application are not limited thereto.

[0080] 3 and 4, in some embodiments of the present application, the support frame 410 may further include a base 414, which is connected to the support table 412 by a sliding guide rail, so that the support table 412 is movable, and the movement direction of the support table 412 is parallel to the extension direction A of the rotation axis O. During the detection process, by adjusting the movement of the support table 412, the radiation source 420 and the detector 430 can be made to face different regions of the target battery 500 to achieve detection. The base 414 provides stability to the entire detection device.

[0081] In the embodiment of the present application, the support base 412 and the C-arm are connected via the connecting arm 413, which not only supports the C-arm but also allows the C-arm to maintain a certain height from the ground during normal use and makes it easier to rotate the C-arm.

[0082] According to some embodiments of the present application, the rotation angle α of the radiation source 420 satisfies 0°<α≦90°.

[0083] Fig. 6 is a front view of a detection device in another state according to some embodiments of the present application. Fig. 7 is a front view of a detection device in another state according to some embodiments of the present application. Here, when the C-shaped arm of the detection device shown in Fig. 3 is rotated by a certain angle along the first rotation direction X, the detection device shown in Fig. 6 is obtained, and when the C-shaped arm of the detection device shown in Fig. 3 is rotated by a certain angle along the second rotation direction Y, the detection device shown in Fig. 7 is obtained. It should be noted that in Figs. 6 and 7, the target battery 500 is not shown in order to clearly show the structure of the detection device.

[0084] In the embodiment of the present application, the C-arm can rotate back and forth, i.e., the radiation source 420 can rotate along two opposite rotation directions. Therefore, the rotation angle α of the radiation source 420 in the embodiment of the present application refers to the included angle α between the two positions when the radiation source 420 rotates to its maximum position along two opposite rotation directions during detection, i.e., the maximum rotation angle of the radiation source 420 during detection, and is not the maximum angle through which the radiation source 420 itself can rotate.

[0085] The detection device of the embodiment of the present application detects the adhesive application status of the target battery 500. Because the adhesive application area of ​​the target battery 500 is located at the bottom of the target battery 500, the radiation emitted from the radiation source 420 only needs to be directed at the bottom surface of the target battery 500 during detection, eliminating the need to detect the sides of the battery. Furthermore, the radiation emitted from the radiation source 420 is conical, allowing a wide area to be covered with a single irradiation of the target battery 500, and enabling detection of the entire bottom of the target battery 500 without rotating the radiation source 420 by a large angle. Limiting the rotation angle of the radiation source 420 to α≦90° allows for small rotation angles, making detection more convenient, saving time, and improving efficiency.

[0086] At the same time, during detection, the radiation emitted from the radiation source 420 does not need to pass through two sides of the target battery 500, and the penetration thickness can be reduced.

[0087] According to some embodiments of the present application, the mounting table 440 is movably located between the radiation source 420 and the detector 430, and the direction of movement of the mounting table 440 is perpendicular to the direction in which the rotation axis O extends.

[0088] In other embodiments of the present application, the platform 440 may be connected to a conveyor belt, or the platform 440 may be connected to a circular guide rail or the like.

[0089] For example, when the mounting table 440 is connected to a circular guide rail, the material of the tray on the circular guide rail may be carbon fiber, which can reduce the influence on detection.

[0090] The detection device according to the embodiment of the present application may be placed after the completion of the battery manufacturing process, and the manufactured battery is transported by the circular guide rail directly to the mounting table 440 between the radiation source 420 and the detector 430 for detection, and after the detection is completed, the battery is transported by the mounting table 440 to the circular guide rail for the next process. In other embodiments, the battery 500 to be detected may be moved to the mounting table 440 by a mechanical gripper or an overhead crane.

[0091] Since the direction of movement of the mounting table 440 is perpendicular to the direction A in which the rotation axis O extends, each part of the battery can be detected.

[0092] In the embodiment of the present application, the mounting table 440 is movably located between the radiation source 420 and the detector 430, and by moving the mounting table 440, the batteries can be detected continuously, thereby improving the detection efficiency.

[0093] According to some embodiments of the present application, Figure 8 is a block diagram of a detection device of some embodiments of the present application. Referring to Figure 8, the detection device further includes a controller 450, the radiation source 420 is electrically and / or communicatively coupled to the controller 450, and the detector 430 is electrically and / or communicatively coupled to the controller 450.

[0094] 9 is a control flowchart of a controller according to some embodiments of the present application. Referring to FIG. 9, the controller is configured as follows:

[0095] Step S10: The radiation source and the detector are controlled to rotate around the rotation axis.

[0096] Step S20: When the radiation source rotates, the radiation source is controlled to emit radiation that passes through the target cell on the mounting table and is projected onto the detector.

[0097] Step S30: Obtain a detection image of the target battery based on the radiation received by the detector.

[0098] Step S40: Based on the detected image, adhesive application information of the target battery is determined.

[0099] In some embodiments of the present application, the controller 450 may include a memory and a processor, where the memory is used to store instructions and the processor is used to read the instructions and execute instructions according to the instructions.

[0100] In an embodiment of the present application, before starting detection, the detector 430 is calibrated to reduce errors in the detected image. For example, the control detector 430 needs to be calibrated before normal operation. Before calibration, it is necessary to ensure that there are no foreign objects at the exit of the radiation source 420 and the surface of the detector 430, and that there are no obstructions between the radiation source 420 and the detector 430. It is required that the radiation completely covers the light-receiving surface of the detector 430, and at this time, the imaging grayscale value of the detection device may be adjusted to the calibration grayscale value.

[0101] For example, when using a detection device to detect the target battery 500, the large surface of the target battery 500 is attached to the mounting surface of the mounting base 440, i.e., the thickness direction of the target battery 500 is perpendicular to the mounting surface, so the target battery 500 can be left on the mounting base 440 and then detected using the radiation source 420 and the detector 430.

[0102] In an embodiment of the present application, the adhesive application information of the test target battery 500 may be used to indicate whether the adhesive application of the test target battery 500 is acceptable.

[0103] In the embodiment of the present application, if there is an area in the adhesive application area of ​​the battery 500 to be detected that is not filled with adhesive, a grayscale change will appear in the detection image, and adhesive application information of the battery 500 to be detected can be determined based on the grayscale change in the detection image.

[0104] According to the method of the embodiment of the present application, it is possible to detect the application of adhesive to the battery 500 to be detected, and automatic detection is realized.

[0105] According to some embodiments of the present application, when the support frame 410 includes a support base 412 and a connecting arm 413, and the support arm 411 includes a C-arm, step S10 includes configuring the controller as follows:

[0106] Step S11: The C-arm is controlled so as to slide within the arcuate track of the connecting arm.

[0107] By controlling the C-arm to slide within the arcuate track 4131 of the connecting arm 413, the C-arm can be rotated around the rotation axis O to achieve rotation of the radiation source 420 and the detector 430.

[0108] In some embodiments of the present application, the support frame 410 may be electrically and / or communicatively connected to the controller 450, thereby enabling the controller 450 to control the C-arm to slide within the arcuate track 4131 of the connecting arm 413.

[0109] 10 is a control flowchart of a controller according to some embodiments of the present application. Referring to FIG. 10, step S11 includes configuring the controller as follows:

[0110] Step S111: The C-arm is controlled so as to slide in an arcuate trajectory along a first rotation direction.

[0111] Step S112: Control the C-arm to slide in an arcuate trajectory along a second rotation direction, where the first rotation direction is opposite to the second rotation direction.

[0112] 3, 6 and 7, in some embodiments of the present application, when detection is started, the state of the detection device is as shown in Fig. 3, and when detection is started, the C-arm of the detection device shown in Fig. 3 is first controlled to rotate at a certain angle along the first rotation direction X until it rotates to the detection device state shown in Fig. 6, and detection images are collected at a certain frequency in the rotation process. Then, the C-arm of the detection device shown in Fig. 6 is controlled to rotate at a certain angle along the second rotation direction Y until it rotates to the detection device state shown in Fig. 3. Next, the C-arm of the detection device shown in Fig. 3 is controlled to rotate at a certain angle along the second rotation direction Y until it rotates to the detection device state shown in Fig. 7, and detection images are collected at a certain frequency in the rotation process.

[0113] The above detection process is described using the example of first rotating to the state of the detection device shown in FIG. 6 and then rotating to the state of the detection device shown in FIG. 7, but in other embodiments, the detection process may first rotate to the state of the detection device shown in FIG. 7 and then rotate to the state of the detection device shown in FIG. 6, or may be in other cases, and the present application is not limited thereto.

[0114] During the detection process, the C-arm rotates back and forth and the support base 412 moves along the extension direction A of the rotation axis O, so that the radiation source 420 and the detector 430 can detect the entire adhesive-coated area on the bottom of the target battery 500.

[0115] According to some embodiments of the present application, the target battery 500 includes a bottom surface, and an adhesive application area is provided on the bottom surface. Figure 11 is a control flowchart of a controller according to some embodiments of the present application. Referring to Figure 11, the controller is further configured as follows:

[0116] Step S50: The bottom surface of the battery to be detected is controlled so as to adhere to the mounting surface of the mounting stand.

[0117] The shape of the target battery 500 resembles a rectangular parallelepiped, with two large faces facing each other and four side faces connecting the two large faces. The large faces are the top and bottom faces of the target battery, which are located in the first and second sections 11 and 12 of the housing 10, respectively. The bottom face has an adhesive application area, and adhesive for adhering the battery cells is provided in the adhesive application area. For example, if the bottom face is located in the second section 12, the second section 12 also has an adhesive application area.

[0118] In the embodiment of the present application, the bottom surface of the battery 500 to be detected is attached to the mounting surface of the mounting stand, so that the state of the battery 500 to be detected at the time of detection can be the same as the state when it is installed in the vehicle, which makes it possible to some extent to avoid unexpected defects such as misalignment of the internal structure due to upright placement or rotation of the battery 500 to be detected, which may affect its reliability.

[0119] According to some embodiments of the present application, when the mounting table 440 can move along an extension direction A perpendicular to the rotation axis O, referring to FIG. 11 , the controller is further configured as follows:

[0120] Step S60: The mounting table is controlled to move along an extension direction perpendicular to the rotation axis, and the mounting table is positioned between the radiation source and the detector.

[0121] By positioning the mounting base 440 between the radiation source 420 and the detector 430, radiation emitted from the radiation source 420 can be projected onto the detector 430 through the target cell located on the mounting base 440.

[0122] In some embodiments of the present application, the mounting platform 440 may be electrically and / or communicatively coupled to a controller 450 , which may control the movement of the mounting platform 440 .

[0123] According to some embodiments of the present application, Figure 12 is a control flowchart of a controller according to some embodiments of the present application. Referring to Figure 12, step S30 includes configuring the controller as follows:

[0124] Step S31: Collect a plurality of original images based on the radiation received by the detector.

[0125] Step S32: A plurality of original images are three-dimensionally reconstructed to obtain a bottom surface detection image of the target battery, which has an adhesive application area on the bottom surface.

[0126] Step S33: A detection image of the target battery is determined based on the bottom surface detection image.

[0127] In the embodiment of the present application, the original image is an unprocessed image, and at this time, the target battery 500 in the image is not clear enough. After processing multiple original images, the target battery 500 in the image becomes clearer, and the adhesive application status of the target battery 500 can be more easily identified.

[0128] Since multiple original images are collected during the rotation process of the radiation source 420 and the detector 430, an image of the entire target battery 500 can be obtained by three-dimensionally reconstructing the multiple original images. The present application only needs to detect the bottom surface of the target battery 500, and only extracts the bottom surface detection image of the target battery 500, without needing to detect the entire target battery 500, thereby reducing subsequent calculations.

[0129] In the embodiment of the present application, the above method can obtain a clearer detected image and reduce subsequent calculations.

[0130] In the embodiment of the present application, the number of original images of the detection target battery 500 to be collected may be set according to needs, for example, 720 original images may be collected.

[0131] In an embodiment of the present application, detection can be achieved by detecting one area of ​​the target battery 500, and then controlling and moving the support base 412 to make the radiation source 420 and the detector 430 face another area of ​​the target battery 500.

[0132] In the embodiment of the present application, the target area is cut out from the bottom detection image, and the necessary area is cut out until there is no surrounding information area, thereby improving the efficiency of image processing and reducing the storage size of the image. Next, the contrast of the image is enhanced to increase the grayscale contrast in the image, and the abnormal adhesive application area in the image is highlighted, and the detection image is obtained.

[0133] According to some embodiments of the present application, the controller is stored with a glue application detection model, and step S40 includes configuring the controller to:

[0134] Step S41: The detected image is input to the adhesive application detection model, and adhesive application information of the target battery is obtained, output from the adhesive application detection model.

[0135] In an embodiment of the present application, the adhesive application detection model stores multiple adhesive application types, and after a detected image is input into the adhesive application detection model, adhesive application information in the detected image can be quickly identified based on the stored adhesive application types.

[0136] 13 is a flowchart of a training process for an adhesive application detection model according to some embodiments of the present application. Referring to FIG. 13, the training process for an adhesive application detection model includes the following steps:

[0137] Step S101: Obtain a sample detection image including adhesive application on a sample battery, taken under irradiation with a radiation source.

[0138] Step S102: Mark the actual adhesive application information in the sample detection image.

[0139] Step S103: The sample detection image is input into the adhesive application detection model at the same time, and the predicted adhesive application information of the sample battery is output from the adhesive application detection model.

[0140] Step S104: Calculate a loss value based on the actual adhesive application information and the predicted adhesive application information.

[0141] Step S105: Adjust the parameters of the adhesive application detection model based on the loss value.

[0142] In the embodiment of the present application, not only can the parameters of the adhesive application detection model be improved through the sample battery, but the parameters of the adhesive application detection model can also be improved using the detection image of the target battery 500 detected each time.

[0143] For example, to facilitate observation and checking by an operator, after the detection is completed, the abnormality of the adhesive application in the detected image can be calibrated, and if an error occurs, the parameters of the adhesive application detection model can be adjusted according to the error to form a more accurate adhesive application detection model.

[0144] As an example, the adhesive detection model can continuously learn the grayscale features of the detected image through a convolutional neural network and adjust the internal parameters to improve the adhesive detection model.

[0145] In the embodiment of the present application, before detection, various sizes and types of defect samples to be detected are first defined according to the detection requirements, and a sample battery is created along with the actual adhesive application information of the sample battery. Next, the sample battery is detected, and the predicted adhesive application information of the sample battery output from the adhesive application detection model is compared with the actual adhesive application information, and the parameters of the adhesive application detection model are continuously improved to further improve the accuracy of adhesive application detection.

[0146] According to some embodiments of the present application, Figure 14 is a control flowchart of a controller according to some embodiments of the present application. Referring to Figure 14, step S40 includes configuring the controller as follows:

[0147] Step S42: Based on the detected image, the proportion of the adhesive application abnormality area of ​​the battery to be detected is determined.

[0148] Step S43: Determine adhesive application information for the battery to be detected based on the proportion of the adhesive application abnormality area.

[0149] In the embodiment of the present application, the percentage of the adhesive application abnormality area is a criterion for evaluating the abnormality of the adhesive application on the battery 500 to be detected, and the adhesive application information of the battery to be detected can be determined based on the percentage of the adhesive application abnormality area.

[0150] Here, the percentage of the abnormal adhesive application area is the percentage of the abnormal adhesive application area detected by the adhesive application detection model to the total adhesive application area. For example, the total adhesive application area can be identified through the detection image, or for batteries of the same type, the total adhesive application area can be input to the controller.

[0151] According to some embodiments of the present application, and referring to FIG. 11 , the controller is further configured to:

[0152] Step S71: In response to the ratio of the adhesive application abnormal area being greater than a preset value, it is determined that the battery to be detected is unacceptable.

[0153] In the embodiment of the present application, if the proportion of the adhesive coating abnormal area is greater than a preset value, it indicates that the adhesive coating of the battery 500 to be detected is unqualified, which will affect the stability of the battery 500 to be detected, and it will be determined that the battery 500 to be detected is unqualified.

[0154] According to some embodiments of the present application, and referring to FIG. 11 , the controller is further configured to:

[0155] Step S72: In response to the percentage of the adhesive application abnormality area being equal to or less than a preset value, it is determined that the battery to be detected is acceptable.

[0156] The controller 450 in the embodiment of the present application can control the detection target battery 500 to completely detect the battery, and can also detect a specific abnormality according to instructions. The location of the abnormality may be input directly to the controller 450.

[0157] According to some embodiments of the present application, the preset value is greater than or equal to 10% and less than or equal to 25%.

[0158] In the battery manufacturing process, it is difficult to complete adhesive application without defects. If the preset value is set too low, for example, below 10%, too many batteries will be determined to be unacceptable, which may affect battery yield. If the preset value is set too high, for example, above 25%, the area of ​​adhesive application abnormalities in the battery will increase, which will affect battery reliability. Setting the preset value between 10% and 25% can improve battery reliability while maintaining a certain level of battery yield.

[0159] An embodiment of the present application provides a battery manufacturing device including any of the detection devices in the above embodiments.

[0160] The battery manufacturing equipment includes a detection device 400, which performs non-destructive detection on the battery 500 to be detected during the manufacturing process of the battery 500 to detect any abnormalities in the adhesive application to the battery 500 to be detected in a timely manner, thereby removing any unacceptable battery 500 to be detected and improving the quality of the battery 500 to be detected.

[0161] The detection device of the present application is further described below with reference to one exemplary embodiment.

[0162] The detection device 400 includes a support frame 410, a radiation source 420, a detector 430, and a mounting table 440. The support frame 410 includes a C-arm, and the radiation source 420 and the detector 430 are connected to both ends of the C-arm, respectively. The detector 430 faces the exit port of the radiation source 420. The C-arm can rotate around a rotation axis O, thereby maintaining the detector 430 facing the exit port of the radiation source 420 during rotation. The mounting table 440 is movably positioned between the radiation source 420 and the detector 430, and the movement direction of the mounting table 440 is perpendicular to the extension direction A of the rotation axis O. The rotation angle α of the radiation source 420 satisfies 0°<α≦90°.

[0163] The support frame 410 further includes a support base 412 and a connecting arm 413. The connecting arm 413 is connected to the support base 412 and has an arcuate track 4131, the center of which is located on the rotation axis O. Here, the outer arc surface of the C-arm has a protrusion 4111 that fits into the arcuate track 4131, and the protrusion 4111 is slidably located within the arcuate track 4131. The support frame 410 may further include a base 414 that is connected to the support base 412 via a slide guide rail, and the movement direction of the support 412 is parallel to the extension direction A of the rotation axis O.

[0164] When detecting, scanning starts from one edge of the target battery 500, and the C-arm rotates back and forth at a small angle once to complete the detection of one area, then moves to detect another area, moving according to a set program until the detection of the target battery 500 is completed, and the completed pictures are stitched together to form a complete detection image of the target battery 500.

[0165] In the embodiment of the present application, the radiation source 420 may be a 450 KV microfocus open tube X-ray source, and the detector 430 may be a flat panel detector, and the effective detection area of ​​the flat panel detector must be greater than 30 cm x 30 cm.

[0166] Finally, it should be noted that the above examples are merely for illustrating the technical solutions of the present application and are not limiting thereof. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the technical solutions described in the above examples may still be modified or some or all of the technical features may be replaced with equivalents. These modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the examples of the present application, and should all be included in the scope of the claims and description of the present application. In particular, as long as there is no structural contradiction, the technical features mentioned in the examples may be combined in any manner. The present application is not limited to the specific examples disclosed herein, but includes all technical solutions included in the claims.

Claims

1. 1. A detection device for detecting adhesive application to a battery, comprising: a support frame (410) including support arms (411); a radiation source (420) connected to the support arm (411); a detector (430) connected to the support arm (411), the detector (430) facing an exit port of the radiation source (420); a mounting table (440) located between the radiation source (420) and the detector (430), the mounting table (440) being used to place a battery (500) to be detected; Here, the radiation source (420) and the detector (430) can rotate around the same rotation axis, and since the rotation direction of the radiation source (420) is the same as the rotation direction of the detector (430), the detector (430) is maintained facing the exit port of the radiation source (420) during rotation, and the mounting table (440) is located between the radiation source (420) and the detector (430).

2. 2. The detection device of claim 1, wherein the support arm (411) includes a C-arm, the radiation source (420) is connected to one end of the C-arm, the detector (430) is connected to the other end of the C-arm, and the C-arm can rotate around the rotation axis.

3. The support frame (410) A support base (412); a connecting arm (413) connected to the support base (412), the connecting arm (413) having an arcuate track (4131), the center of the arcuate track (4131) being located on the rotation axis; Here, the outer arc surface of the C-arm has a protrusion (4111) that is aligned with the arc-shaped track (4131), and the protrusion (4111) is positioned slidably within the arc-shaped track (4131), as described in claim 2.

4. The detection device according to any one of claims 1 to 3, wherein a rotation angle α of the radiation source (420) satisfies 0°<α≦90°.

5. 5. The detection device according to claim 1, wherein the mounting table (440) is movably positioned between the radiation source (420) and the detector (430), and the direction of movement of the mounting table (440) is perpendicular to the extension direction of the rotation axis.

6. The detection device includes: a controller, wherein the radiation source is electrically and / or communicatively coupled to the controller, and the detector is electrically and / or communicatively coupled to the controller; wherein the controller: controlling the radiation source and the detector to rotate about the axis of rotation; controlling the radiation source so that, when the radiation source rotates, the radiation is emitted and passes through the test target battery located on the table, and is projected onto the detector; acquiring a detected image of the target battery based on the radiation received by the detector; The detection device according to any one of claims 1 to 5, configured to be used to determine adhesive application information of the target battery based on the detected image.

7. When the support frame includes a support base and a connecting arm, and the support arm includes a C-arm, controlling the radiation source and the detector to rotate about the rotation axis includes: The detection apparatus of claim 6 , further comprising configuring the controller to control the C-arm to slide within the arcuate track of the connecting arm.

8. The step of controlling the C-arm to slide within the arcuate path of the connecting arm includes: controlling the C-arm to slide within the arcuate path along a first rotational direction; 8. The detection apparatus of claim 7, further comprising configuring the controller to control the C-arm to slide in the arcuate trajectory along a second rotational direction, the first rotational direction being opposite to the second rotational direction.

9. The target battery includes a bottom surface, and the bottom surface has an adhesive application area. The controller further 9. The detection device according to claim 6, wherein the detection device is configured to control the bottom surface of the battery to be detected so that the bottom surface of the battery to be detected adheres to the mounting surface of the mounting table.

10. When the mounting table is movable along an extension direction perpendicular to the rotation axis, the controller further 10. The detection device according to claim 6, wherein the stage is controlled to move along an extension direction perpendicular to the rotation axis, and the stage is positioned between the radiation source and the detector.

11. The step of acquiring a detected image of the target battery based on radiation received by the detector includes: acquiring a plurality of original images based on the radiation received by the detector; The plurality of original images are three-dimensionally reconstructed to obtain a bottom surface detection image of the battery to be detected, and an adhesive application area is present on the bottom surface; The detection device according to any one of claims 6 to 10, further comprising configuring the controller to determine a detected image of the target battery based on the bottom detected image.

12. The controller stores an adhesive application detection model, and the step of determining adhesive application information of the target battery based on the detected image includes: The detection device according to any one of claims 6 to 11, further comprising a step of configuring the controller to input the detected image into an adhesive application detection model and acquire adhesive application information of the battery to be detected output from the adhesive application detection model.

13. The process of training the adhesive application detection model includes: acquiring a sample detection image, taken under irradiation by the radiation source, including application of adhesive to the sample battery; marking actual adhesive application information in the sample detection image; inputting the sample detection image into the adhesive detection model simultaneously to obtain predicted adhesive information of the sample battery output from the adhesive detection model; calculating a loss value based on the actual adhesive application information and the predicted adhesive application information; and adjusting parameters of the adhesive application detection model based on the loss value.

14. determining adhesive application information of the target battery based on the detected image, determining a proportion of an area of ​​the battery subject to detection where adhesive application is abnormal based on the detected image; The detection device according to any one of claims 6 to 13, further comprising a step of configuring the controller to determine adhesive application information of the battery to be detected based on the percentage of the adhesive application abnormality area.

15. The controller further comprises: The detection device according to any one of claims 6 to 14, configured to determine that the battery to be detected is unacceptable in response to the percentage of the adhesive application abnormal area being greater than a preset value.

16. The detection device according to claim 15 , wherein the predetermined value is equal to or greater than 10% and equal to or less than 25%.

17. A battery manufacturing device comprising the detection device according to any one of claims 1 to 16.

Images