Detection device and battery production equipment

Abstract

The invention provides a detection device and battery production equipment, and belongs to the technical field of batteries. The detection device comprises a support, a radiation source, a detector and a bearing platform. The supporting frame comprises a supporting arm, the radiation source and the detector are both connected with the supporting arm, the detector is opposite to an exit port of the radiation source, the bearing platform is located between the radiation source and the detector, 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 the radiation source and the detector can rotate synchronously during rotation. The detector is opposite to an exit port of the radiation source, and the bearing platform is located between the radiation source and the detector. According to the detection device provided by the embodiment of the invention, the gluing detection of the to-be-detected battery can be realized.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a detection device and battery production equipment. 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 battery includes a box and a battery cell located in the box. The battery cell is bonded to the box with glue. However, due to the fluidity of the glue, the gap between the battery cell and the box may not be filled with glue. Insufficient glue coating leads to insufficient bonding strength between the battery cell and the box, affecting the stability of the battery. Therefore, how to detect the glue coating of the battery is an urgent problem to be solved. 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 detection device and a battery production device to detect the glue coating of the battery.

[0005] An embodiment of the first aspect of the present application provides a detection device for battery gluing, comprising: a support frame, including a support arm; a radiation source, connected to the support arm; a detector, connected to the support arm, and the detector is opposite to the radiation source outlet; a carrying platform, located between the radiation source and the detector, and the carrying platform is used to place the battery to be tested; 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 during rotation, the detector and the radiation source outlet remain opposite, and the carrying platform is located between the radiation source and the detector.

[0006] In the technical solution of the embodiment of the present application, the battery to be tested can be scanned and tested by the ray source, the detector and the carrying platform, and the ray source and the detector can rotate around the same rotation axis O, and can be detected around the battery to be tested during the rotation, so that the detection is more comprehensive and the situation of missed detection can be avoided to a certain extent. After the battery to be tested is tested, the glue coating condition of the battery to be tested can be obtained according to the detection image, so as to realize the glue coating detection of the battery to be tested.

[0007] In some embodiments, the support arm includes a C-arm, the radiation source is connected to one end of the C-arm, the detector is connected to the other end of the C-arm, and the C-arm can rotate around a rotation axis. The support arm is set as a C-arm, and the radiation source and the detector are respectively connected to the two fixed ends of the C-arm. When the C-arm rotates, the relative positions of the radiation source and the detector do not change, so that when rotating, the detector always remains relative to the exit port of the radiation source. The radiation source and the detector are driven to rotate by controlling the rotation of the C-arm. Since 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 separately, the rotation speed and direction of the radiation source and the detector need to be considered. That is, the embodiment of the present application provides a C-arm to control the rotation of the radiation source and the detector, which is more convenient.

[0008] In some embodiments, the support frame further includes: a support; a connecting arm connected to the support, the connecting arm having an arc track, the center of which is located at the rotation axis; wherein the outer arc surface of the C-arm has a protrusion matching the arc track, and the protrusion is slidably located in the arc track. The support and the C-arm are connected by the connecting arm, which not only provides support for the C-arm, but also allows the C-arm to be at a certain height from the ground during normal use, so as to facilitate the rotation of the C-arm.

[0009] In some embodiments, the rotation angle α of the ray source satisfies: 0°<α≤90°. The detection device detects the glue coating condition of the battery to be tested. The glue coating area of ​​the battery to be tested is located at the bottom of the battery to be tested. Therefore, during the detection, the rays emitted by the ray source can irradiate the bottom of the battery to be tested, and there is no need to detect the side of the battery. At the same time, the rays emitted by the ray source are conical, and a larger area can be covered in one irradiation of the battery to be tested. The entire bottom of the battery to be tested can be detected without the ray source rotating a large angle. Limiting the rotation angle of the ray source to α≤90° can achieve small angle rotation, which is more convenient and saves detection time, improving efficiency.

[0010] In some embodiments, the carrying platform is movably located between the ray source and the detector, and the moving direction of the carrying platform is perpendicular to the extending direction of the rotation axis. The mobile carrying platform can realize continuous detection of the battery, thereby improving the detection efficiency.

[0011] 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 around the rotation axis; when the radiation source rotates, control the radiation source to emit radiation and project it through the battery to be tested located on the supporting platform to the detector; obtain a detection image of the battery to be tested based on the radiation received by the detector; and determine the glue coating information of the battery to be tested based on the detection image. The method provided in the embodiment of the present application can detect the glue coating of the battery to be tested.

[0012] In some embodiments, when the support frame includes a support and a connecting arm, and the supporting arm includes a C-arm, controlling the radiation source and the detector to rotate around the rotation axis includes configuring the controller to: control the C-arm to slide in the arc track of the connecting arm. Controlling the C-arm to slide in the arc track of the connecting arm can cause the C-arm to rotate around the rotation axis O, thereby realizing the rotation of the radiation source and the detector.

[0013] In some embodiments, controlling the C-arm to slide in the arc track of the connecting arm includes configuring the controller to: control the C-arm to slide in the arc track along a first rotation direction; control the C-arm to slide in the arc track along a second rotation direction, wherein 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 fully detect the bottom glue coating area of ​​the battery to be tested.

[0014] In some embodiments, the battery to be tested includes a bottom surface, and the bottom surface has a glue-coated area, and the controller is further configured to: control the bottom surface of the battery to be tested to fit with the bearing surface of the bearing platform. The bottom surface of the battery to be tested fits with the bearing surface of the bearing platform, so that the state of the battery to be tested during testing can be the same as the state loaded in the car, which can avoid unforeseen defects such as misalignment of the internal structure caused by the upright placement or rotation of the battery to be tested to a certain extent, affecting its reliability.

[0015] In some embodiments, when the carrying platform is movable along an extension direction perpendicular to the rotation axis, the controller is further configured to: control the carrying platform to move along an extension direction perpendicular to the rotation axis so that the carrying platform is located between the ray source and the detector. The carrying platform is located between the ray source and the detector so that the ray emitted by the ray source can pass through the battery to be tested on the carrying platform and project onto the detector.

[0016] In some embodiments, obtaining a test image of the battery to be tested based on the rays received by the detector includes configuring the controller to: collect multiple original images based on the rays received by the detector; perform three-dimensional reconstruction on the multiple original images to obtain a bottom surface test image of the battery to be tested, where the bottom surface has a glue-coated area; and determine the test image of the battery to be tested based on the bottom surface test image. The above method can obtain a clearer test image and reduce subsequent operations.

[0017] In some embodiments, a glue coating detection model is stored in the controller, and the glue coating information of the battery to be tested is determined based on the detection image, including configuring the controller to: input the detection image into the glue coating detection model to obtain the glue coating information of the battery to be tested output by the glue coating detection model. The glue coating detection model stores a variety of glue coating types, and after the detection image is input into the glue coating detection model, the glue coating information in the detection image can be quickly identified according to the stored glue coating types.

[0018] In some embodiments, the training process of the glue coating detection model includes: obtaining a sample detection image including glue coating of a sample battery obtained by shooting under the irradiation of a radiation source; marking the real glue coating information in the sample detection image; inputting the sample detection image into the glue coating detection model at the same time to obtain the predicted glue coating information of the sample battery output by the glue coating detection model; calculating the loss value based on the real glue coating information and the predicted glue coating information; and adjusting the parameters of the glue coating detection model based on the loss value. Before the detection, the defective samples of various sizes and types to be detected can be defined according to the detection requirements to make a sample battery, and the real glue coating information in the sample battery can be marked at the same time. Then the sample battery is tested, and the predicted glue coating information of the sample battery output by the glue coating detection model is compared with the real glue coating information, and the parameters of the glue coating detection model are continuously improved to make the glue coating detection more accurate.

[0019] In some embodiments, based on the detection image, determining the glue coating information of the battery to be tested includes configuring the controller to: determine the proportion of the abnormal glue coating area of ​​the battery to be tested based on the detection image; and determine the glue coating information of the battery to be tested based on the proportion of the abnormal glue coating area. The proportion of the abnormal glue coating area is a standard for measuring the glue coating abnormality of the battery to be tested, and the glue coating information of the battery to be tested can be determined based on the proportion of the abnormal glue coating area.

[0020] In some embodiments, the controller is further configured to: in response to the proportion of the abnormal glue coating area being greater than a preset value, determine that the battery to be tested is unqualified. When the proportion of the abnormal glue coating area is greater than the preset value, it means that the glue coating of the battery to be tested is unqualified, which will affect the stability of the battery to be tested, and the battery to be tested is determined to be unqualified.

[0021] In some embodiments, the preset value is greater than or equal to 10% and less than or equal to 25%. During the production process of the battery, it is difficult to complete the glue coating without defects. If the preset value is set too small, for example, less than 10%, too many batteries may be identified as unqualified, affecting the battery production. If the preset value is set too large, for example, greater than 25%, the battery will have a large area of ​​abnormal glue coating, affecting the reliability of the battery. Setting the preset value to be greater than or equal to 10% and less than or equal to 25% can improve the reliability of the battery while ensuring the battery production to a certain extent.

[0022] An embodiment of a second aspect of the present application provides a battery production device, including the detection device in the above embodiment.

[0023] 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

[0024] 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.

[0025] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0026] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0027] Figure 3 A front view of a detection device according to some embodiments of the present application;

[0028] Figure 4 A left side view of a detection device according to some embodiments of the present application;

[0029] Figure 5 A cross-sectional view of the connection between the connecting arm and the C-arm in some embodiments of the present application;

[0030] Figure 6 A front view of the detection device in some embodiments of the present application in another state;

[0031] Figure 7 A front view of the detection device in some embodiments of the present application in another state;

[0032] Figure 8A block diagram of a detection device according to some embodiments of the present application;

[0033] Fig. 9 A control flow chart of a controller in some embodiments of the present application;

[0034] Fig.10 A control flow chart of a controller in some embodiments of the present application;

[0035] Fig.11 A control flow chart of a controller in some embodiments of the present application;

[0036] Fig.12 A control flow chart of a controller in some embodiments of the present application;

[0037] Fig.13 A training flow chart of a glue detection model for some embodiments of the present application;

[0038] Fig.14 This is a control flow chart of a controller according to some embodiments of the present application.

[0039] Description of reference numerals:

[0040] 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, housing; 11, first part; 12, second part; 20, battery cell;

[0041] 400, detection device; 410, support frame; 420, radiation source; 430, detector; 440, carrying platform; 450, controller; 411, support arm; 412, support; 413, connecting arm; 414, base; 4131, arc track; 4111, protrusion; 500, battery to be tested. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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).

[0048] 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.

[0049] 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.

[0050] 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.

[0051] As the requirements for battery energy density become higher and higher, CTP (Cell to Pack) batteries are increasingly used. CTP integrates battery cells directly into the battery, removing the intermediate state of the module, which can reduce the weight and volume of the battery, thereby increasing the battery's energy density. The battery cell is fixedly connected to the battery box by glue. Due to the difference in glue fluidity, the air in the box may not be discharged in time during glue application, and the glue slowly fills the air cavity, generating bubbles, or the glue material contains bubbles. The absence of glue in the bubble area causes the battery cell to directly contact the box, posing a short circuit risk. At the same time, insufficient glue application leads to insufficient bonding strength between the battery cell and the box. When the battery vibrates, it is easy to cause the battery cell to detach from the box, affecting the reliability of the battery.

[0052] In the related art, ultrasonic technology is used to detect batteries, but some batteries have water cooling pipes at the bottom and cannot be detected by ultrasonic technology.

[0053] An embodiment of the present application provides a detection device, which detects the battery by emitting rays from a ray source to pass through a battery placed on a supporting platform and project them onto a detector. At the same time, the ray source and the detector are rotated so that the ray source and the detector can detect the entire battery while rotating, thereby achieving non-destructive detection of the battery's glue coating condition.

[0054] The detection device and battery production equipment disclosed in the embodiments of the present application can be used in the battery production and manufacturing process, and the detected or produced batteries can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The power supply system of the electrical device can be composed of the battery disclosed in the present application.

[0055] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0056] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0057] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also 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, navigating and driving the vehicle 1000.

[0058] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 An exploded diagram of a battery provided for some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20, and the battery cell 20 is contained in the housing 10. Among them, the housing 10 is used to provide a storage space for the battery cell 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers 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 be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0060] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0061] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0062] The present application embodiment provides a detection device for detecting battery glue coating. Figure 3 This is a front view of the detection device of some embodiments of the present application. Figure 3 , the detection device 400 includes a support frame 410, a radiation source 420, a detector 430 and a carrying platform 440. The support frame 410 includes a support arm 411, the radiation source 420 and the detector 430 are both connected to the support arm 411, and the detector 430 is opposite to the emission port of the radiation source 420, and the carrying platform 440 is located between the radiation source 420 and the detector 430, wherein the radiation source 420 and the detector 430 can rotate around the same rotation axis O, and the rotation direction of the radiation source 420 is the same as the rotation direction of the detector 430, so that during rotation, the detector 430 remains opposite to the emission port of the radiation source 420, and the carrying platform 440 is located between the radiation source 420 and the detector 430. For the convenience of explanation, Figure 3 A battery 500 to be tested is also shown, and the carrying platform 440 is used to place the battery 500 to be tested.

[0063] The support frame 410 can be any component used to install the ray source 420 and the detector 430 to improve the stability of the ray source 420 and the detector 430. The support arm 411 is used to fix the ray source 420 and the detector 430. When the ray source 420 and the detector 430 are installed on the support arm 411, the detector 430 can be opposite to the emission port of the ray source 420, so that the rays emitted by the ray source 420 can pass through the battery 500 to be tested on the supporting platform 440 and projected onto the detector 430, thereby realizing the detection of the battery 500 to be tested.

[0064] The ray source 420 is a device for emitting detection rays, which mainly includes a ray tube and a corresponding power supply. The detection rays can be X-rays or other rays. The ray tube can emit corresponding detection rays, such as an X-ray tube or a gamma-ray tube. The ray source 420 can be open (open tube) or closed (closed tube). In one example, the ray source 420 is an X-ray source, and the detection rays it emits are X-rays. When the detection rays emitted by the ray source 420 pass through the battery 500 to be tested, due to the difference in thickness of the unused glue-coated areas of the battery 500 to be tested, the absorption rate of the X-rays is different, so the glue coating detection can be performed through the different absorption degrees of the X-rays.

[0065] The rays emitted by the ray source 420 are all penetrating, and the attenuation degree of the rays by materials of different thicknesses is different, so that the amount of rays detected by the detector 430 is different. There is a layer of luminescent material inside the detector 430, which can emit visible light signals under the excitation of rays. The visible light signals are transmitted to the photoelectric converter to form electrical signals, and then the digital signals are output through the internal electrical signal transmission circuit, which represents the image with light and dark contrast on the image. After the rays pass through the detected object, there will be a certain attenuation. The more rays that pass through, the more luminescent signals the photosensitive material will emit, and the brighter the area will be on the final image. On the contrary, the fewer rays that pass through, the darker the area on the image. The detector 430 can be a flat panel detector or a linear array detector, which is not limited in the embodiment of the present application.

[0066] The carrying platform 440 can be any carrying structure that can fix the battery 500 to be tested in a supporting or clamping manner, such as a tray, a clamp, etc. The carrying platform 440 can be fixed or movable, such as a tray or a clamping mechanism that is provided with a conveying track and moves along the conveying track. The number of batteries 500 to be tested carried on the carrying platform 440 can be one or more. In one example, the carrying platform 440 can include multiple trays, each tray carrying one or more batteries 500 to be tested. The battery 500 to be tested can be a battery 100 including multiple battery cells 20.

[0067] In the embodiment of the present application, the load-bearing capacity of the carrying platform 440 is greater than the weight of the battery to be tested 500 placed thereon.

[0068] In the embodiment of the present application, the thickness of each area of ​​the carrying platform 440 is equal, which reduces the impact on the detection result.

[0069] In the embodiment of the present application, the ray source 420 and the detector 430 can rotate around the same rotation axis O, and the support arm 411 rotates to drive the ray source 420 and the detector 430 to rotate.

[0070] In the embodiment of the present application, when the ray source 420 and the detector 430 rotate, it is necessary to ensure that the carrying platform 440 is located between the ray source 420 and the detector 430, so that during detection, the rays emitted by the ray source 420 can pass through the battery 500 to be tested on the carrying platform 440 and project onto the detector 430. For example, Figure 4 This is a left side view of the detection device of some embodiments of the present application. Figure 3 and Figure 4 , the rotation axis O can be located on the bearing surface of the bearing platform 440, so that when the ray source 420 and the detector 430 rotate, the bearing platform 440 is always located between the ray source 420 and the detector 430. The ray source 420 and the detector 430 can rotate clockwise or counterclockwise.

[0071] The rotation axis O is a virtual line, not a real line. Figure 3 In the figure, the rotation axis O is perpendicular to the plane of the figure, so Figure 3 In the figure, the rotation axis O is replaced by a dot.

[0072] The detection device provided in the embodiment of the present application can scan and detect the battery 500 to be tested through the ray source 420, the detector 430 and the carrying platform 440, and make the ray source 420 and the detector 430 rotate around the same rotation axis O. During the rotation, the ray source 420 and the detector 430 can surround the battery 500 to be tested for detection, making the detection more comprehensive and avoiding missed detection to a certain extent. After the battery 500 to be tested is tested, the glue coating condition of the battery 500 to be tested can be obtained according to the detection image, so as to realize the glue coating detection of the battery 500 to be tested.

[0073] When the detection device provided in the embodiment of the present application detects the battery 500 to be tested, there is no need to disassemble the battery 500 to be tested, and non-destructive detection of the glue coating condition of the battery 500 to be tested can be achieved.

[0074] According to some embodiments of the present application, see Figure 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 the rotation axis O.

[0075] The appearance of the C-arm is similar to the English letter C, and both ends of the C-arm are fixed ends. The radiation source 420 and the detector 430 are respectively connected to the two fixed ends of the C-arm.

[0076] In the embodiment of the present application, the support arm 411 is set as a C-arm, and the ray source 420 and the detector 430 are respectively connected to the two fixed ends of the C-arm. When the C-arm rotates, the relative positions of the ray source 420 and the detector 430 do not change, so that when rotating, the detector 430 always remains relative to the exit of the ray source 420. The rotation of the C-arm is controlled to drive the ray source 420 and the detector 430 to rotate. Since the relative positions of the ray source 420 and the detector 430 are fixed, only the C-arm needs to be rotated, and the rotation speed and direction of the ray source 420 and the detector 430 do not need to be considered. That is, the embodiment of the present application provides a C-arm to control the rotation of the ray source 420 and the detector 430, which is more convenient.

[0077] According to some embodiments of the present application, see Figure 3 and Figure 4 The support frame 410 further includes a support 412 and a connecting arm 413, wherein the connecting arm 413 is connected to the support 412. Figure 5 This is a cross-sectional view of the connection between the connecting arm and the C-arm in some embodiments of the present application. Figure 3 and Figure 5 The connecting arm 413 has an arc track 4131, and the center of the arc track 4131 is located at the rotation axis O. The outer arc surface of the C-arm has a protrusion 4111 matching the arc track 4131, and the protrusion 4111 is slidably located in the arc track 4131. It should be noted that Figure 5 The simplified cross-sectional view shown only shows the connection relationship between the connecting arm and the C-arm, and Figure 5 The cross-sectional view shown shows the cross-section of the arc track 4131 , so it cannot be seen that the arc track 4131 is arc-shaped.

[0078] In the embodiment of the present application, the support 412 provides support for the C-arm, so that the C-arm can be at a certain height from the ground during normal use, which facilitates the rotation of the C-arm. Figure 3 As shown, the shape of the support 412 can be an L-shape with a bend, so that a part of the C-arm can be placed in the groove of the L-shaped support 412, which can save installation space and facilitate the miniaturization design of the detection device 400.

[0079] The connecting arm 413 connects the C-arm and the support 412 , so that the support 412 can provide support for the C-arm.

[0080] See also Figure 5The cross section of the arc track 4131 is T-shaped, and the protrusion 4111 on the C-arm and the main body of the C-arm are also T-shaped, so the C-arm is not easy to fall off after being connected to the connecting arm 413. Since the center of the arc track 4131 is located at the rotation axis O, the sliding track of the C-arm overlaps with the arc track 4131, so that the C-arm rotates along the rotation axis O.

[0081] In some embodiments of the present application, the connecting arm 413 has a gear, the center line 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 meshing with the gear, and when the gear rotates, the C-arm can be driven to rotate. In other implementations, the C-arm can also be rotated in other ways, and the embodiments of the present application are not limited to this.

[0082] See also Figure 3 and Figure 4 In some embodiments of the present application, the support frame 410 may further include a base 414, which is connected to the support 412 via a sliding rail, so that the support 412 is movable, and the moving direction of the support 412 is parallel to the extension direction A of the rotation axis O. During the detection process, the support 412 can be adjusted to move so that the radiation source 420 and the detector 430 can be opposite to different areas of the battery 500 to be detected, thereby realizing detection. The base 414 provides stability for the entire detection device.

[0083] In the embodiment of the present application, the support 412 and the C-arm are connected by a connecting arm 413, which not only provides support for the C-arm, but also allows the C-arm to be at a certain height from the ground during normal use, thereby facilitating the rotation of the C-arm.

[0084] According to some embodiments of the present application, the rotation angle α of the ray source 420 satisfies: 0°<α≤90°.

[0085] Figure 6 This is a front view of the detection device of some embodiments of the present application in another state. Figure 7 This is a front view of the detection device in some embodiments of the present application in another state. Figure 3 After the C-arm in the detection device shown rotates a certain angle along the first rotation direction X, Figure 6 The detection device shown, Figure 3 After the C-arm in the detection device shown rotates a certain angle along the second rotation direction Y, Figure 7 It should be noted that in Figure 6 and Figure 7 In order to clearly show the structure of the detection device, Figure 6 and Figure 7 The battery 500 to be tested is omitted.

[0086] In the embodiment of the present application, since the C-arm can rotate back and forth, that is, the radiation source 420 can rotate in two opposite directions, the rotation angle α of the radiation source 420 in the embodiment of the present application refers to the angle α between the two positions when the radiation source 420 rotates to the maximum position in two opposite directions during detection, that is, the maximum angle of rotation of the radiation source 420 during detection, and is not the maximum angle that the radiation source 420 itself can rotate.

[0087] The detection device of the embodiment of the present application detects the glue coating condition of the battery 500 to be tested. The glue coating area of ​​the battery 500 to be tested is located at the bottom of the battery 500 to be tested. Therefore, during the detection, the rays emitted by the ray source 420 can irradiate the bottom of the battery 500 to be tested, and there is no need to detect the side of the battery. At the same time, the rays emitted by the ray source 420 are conical, and a larger area can be covered in one irradiation of the battery 500 to be tested. It is not necessary to rotate the ray source 420 at a large angle to achieve the detection of the entire bottom of the battery 500 to be tested. Limiting the rotation angle of the ray source 420 to α≤90° can achieve small angle rotation, which is more convenient and saves detection time, improving efficiency.

[0088] At the same time, during detection, the rays emitted by the ray source 420 do not need to penetrate two opposite side surfaces of the battery to be tested 500, which can reduce the penetration thickness.

[0089] According to some embodiments of the present application, the carrying platform 440 is movably located between the ray source 420 and the detector 430 , and the moving direction of the carrying platform 440 is perpendicular to the extending direction A of the rotation axis O.

[0090] In other implementations of the present application, the carrying platform 440 may be connected to a conveyor belt, or the carrying platform 440 may be connected to a circular guide rail, etc.

[0091] Exemplarily, when the carrying platform 440 is connected to the annular guide rail, the tray on the annular guide rail may be made of carbon fiber material, which can reduce the impact on detection.

[0092] The detection device provided in the embodiment of the present application can be placed after the battery manufacturing process is completed, and the completed battery is directly transported to the carrying platform 440 through the circular guide rail to the radiation source 420 and the detector 430 for detection, and after the detection is completed, it is transported to the circular guide rail to the next link through the carrying platform 440. In other implementations, the battery 500 to be tested can be moved to the carrying platform 440 by a mechanical gripper or a crane.

[0093] The moving direction of the carrying platform 440 is perpendicular to the extending direction A of the rotation axis O, so that all parts of the battery can be tested.

[0094] The carrying platform 440 in the embodiment of the present application can be movably located between the radiation source 420 and the detector 430 , and the continuous detection of the battery can be achieved by moving the carrying platform 440 , thereby improving the detection efficiency.

[0095] According to some embodiments of the present application, Figure 8 This is a block diagram of a detection device according to some embodiments of the present application. Figure 8 The detection device also includes a controller 450, the ray source 420 is electrically connected and / or communicatively connected to the controller 450, and the detector 430 is electrically connected and / or communicatively connected to the controller 450.

[0096] Fig. 9 This is a control flow chart of the controller of some embodiments of the present application. Fig. 9 , the controller is configured to:

[0097] Step S10: Control the ray source and the detector to rotate around the rotation axis.

[0098] Step S20: When the ray source rotates, the ray source is controlled to emit rays and pass through the battery to be tested on the supporting platform to project to the detector.

[0099] Step S30: acquiring a detection image of the battery to be tested based on the rays received by the detector.

[0100] Step S40: Determine the glue coating information of the battery to be tested based on the detection image.

[0101] In some embodiments of the present application, the controller 450 may include a memory and a processor, the memory is used to store instructions, and the processor is used to read the instructions and execute commands according to the instructions.

[0102] In an embodiment of the present application, the detector 430 can be calibrated before the detection starts to reduce the error of the detection image. For example, the detector 430 needs to be calibrated before the formal operation. Before calibration, it is necessary to ensure that there is no debris on the exit port of the ray source 420 and the surface of the detector 430, and there is no obstruction between the ray source 420 and the detector 430. It is required that the ray fully covers the receiving surface of the detector 430, and the grayscale value of the imaging of the detection device at this time can be adjusted to the calibration grayscale value.

[0103] For example, when using the detection device to detect the battery 500 to be tested, the battery 500 to be tested can be placed on the carrying platform 440 so that the large surface of the battery 500 to be tested is in contact with the carrying surface of the carrying platform 440, that is, the thickness direction of the battery 500 to be tested is perpendicular to the carrying surface, and then the battery 500 to be tested is detected using the radiation source 420 and the detector 430.

[0104] In the embodiment of the present application, the glue coating information of the battery 500 to be tested can be used to indicate whether the glue coating of the battery 500 to be tested is qualified.

[0105] In the embodiment of the present application, if there is an area of ​​the glue-coated area of ​​the battery 500 to be tested that is not filled with glue, a grayscale change will appear in the detection image, and the glue coating information of the battery 500 to be tested can be determined based on the grayscale change of the detection image.

[0106] The method provided in the embodiment of the present application can detect the glue coating of the battery 500 to be tested, thereby realizing automatic detection.

[0107] According to some embodiments of the present application, when the support frame 410 includes a support 412 and a connecting arm 413, and the support arm 411 includes a C-arm, step S10 includes configuring the controller to:

[0108] Step S11: Control the C-arm to slide within the arc track of the connecting arm.

[0109] By controlling the C-arm to slide in the arc track 4131 of the connecting arm 413 , the C-arm can be rotated around the rotation axis O, thereby realizing the rotation of the ray source 420 and the detector 430 .

[0110] In some embodiments of the present application, the support frame 410 can be electrically and / or communicatively connected to the controller 450 , so that the controller 450 can control the C-arm to slide within the arc track 4131 of the connecting arm 413 .

[0111] According to some embodiments of the present application, Fig.10 This is a control flow chart of the controller of some embodiments of the present application. Fig.10 , step S11 comprises configuring the controller to:

[0112] Step S111: controlling the C-arm to slide in the arc track along a first rotation direction.

[0113] Step S112: Control the C-arm to slide in the arc track along a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

[0114] Combination Figure 3 , Figure 6 and Figure 7 In some embodiments of the present application, at the beginning of the detection, the state of the detection device is as follows: Figure 3 As shown, when the detection starts, first control Figure 3 The C-arm in the detection device shown in the figure rotates a certain angle along the first rotation direction X, and collects detection images at a certain frequency during the rotation until the rotation is Figure 6 The state of the detection device is shown. Then the control Figure 6The C-arm in the detection device shown rotates along the second rotation direction Y to Figure 3 The status of the detection device is shown. Figure 3 The C-arm in the detection device shown in the figure rotates a certain angle along the second rotation direction Y, and collects detection images at a certain frequency during the rotation until the rotation is Figure 7 The status of the detection device is shown.

[0115] The above detection process is to first rotate to Figure 6 The state of the detection device shown, then turn to Figure 7 The state of the detection device shown in FIG. 1 is used as an example for explanation. In other implementations, the state of the detection device shown in FIG. 1 may be rotated to Figure 7 The state of the detection device shown, then turn to Figure 6 The state of the detection device shown; or other situations, this application is not limited to this.

[0116] During the detection process, the C-arm rotates back and forth, and the support 412 moves along the extension direction A of the rotation axis O, so that the radiation source 420 and the detector 430 can fully detect the bottom glue-coated area of ​​the battery 500 to be tested.

[0117] According to some embodiments of the present application, the battery to be tested 500 includes a bottom surface, the bottom surface having a glue-coated area, Fig.11 This is a control flow chart of the controller of some embodiments of the present application. Fig.11 , the controller is also configured to:

[0118] Step S50: controlling the bottom surface of the battery to be tested to fit with the bearing surface of the bearing platform.

[0119] The shape of the battery 500 to be tested is similar to a cuboid, and the battery 500 to be tested has two large faces arranged opposite to each other, and four side faces connecting the two large faces. The large faces are the top face and the bottom face of the battery to be tested, wherein the top face and the bottom face are respectively located in the first part 11 and the second part 12 of the box 10. The bottom face has a glue coating area, and the glue coating area has glue for bonding the battery cells. For example, if the bottom face is located in the second part 12, then the second part 12 has a glue coating area.

[0120] In an embodiment of the present application, the bottom surface of the battery 500 to be tested is in contact with the bearing surface of the bearing platform, so that the state of the battery 500 to be tested during testing can be the same as the state when loaded in the car. This can avoid unforeseen defects such as misalignment of the internal structure due to the upright placement or rotation of the battery 500 to be tested, thereby affecting its reliability.

[0121] According to some embodiments of the present application, when the carrying platform 440 is movable along an extension direction A perpendicular to the rotation axis O, see Fig.11, the controller is also configured to:

[0122] Step S60: Control the carrying platform to move along an extension direction perpendicular to the rotation axis so that the carrying platform is located between the ray source and the detector.

[0123] The carrying platform 440 is located between the ray source 420 and the detector 430 , so that the rays emitted by the ray source 420 can pass through the battery to be tested located on the carrying platform 440 and be projected onto the detector 430 .

[0124] In some embodiments of the present application, the carrying platform 440 may be electrically and / or communicatively connected to the controller 450 , so that the controller 450 may control the movement of the carrying platform 440 .

[0125] According to some embodiments of the present application, Fig.12 This is a control flow chart of the controller of some embodiments of the present application. Fig.12 , step S30 includes configuring the controller to:

[0126] Step S31: collecting a plurality of original images based on the rays received by the detector.

[0127] Step S32: reconstructing the multiple original images in three dimensions to obtain a bottom surface detection image of the battery to be tested, where the bottom surface has a glue-coated area.

[0128] Step S33: determining the detection image of the battery to be tested based on the bottom surface detection image.

[0129] In an embodiment of the present application, the original image is an unprocessed image, and the battery 500 to be tested in the image is not clear enough. After processing multiple original images, the battery 500 to be tested in the image becomes clearer, and it is easier to identify the glue coating condition of the battery 500 to be tested.

[0130] Since the multiple original images are collected when the radiation source 420 and the detector 430 are rotating, the image of the entire battery 500 to be tested can be obtained by performing three-dimensional reconstruction of the multiple original images. However, the present application only needs to detect the bottom surface of the battery 500 to be tested, and only extracts the bottom surface detection image of the bottom surface of the battery 500 to be tested. There is no need to detect the entire battery 500 to be tested, thereby reducing subsequent calculations.

[0131] In the embodiments of the present application, a clearer detection image can be obtained through the above method, and subsequent calculations can be reduced.

[0132] In the embodiment of the present application, the number of the multiple original images of the battery to be tested 500 collected can be set according to the requirements. For example, 720 original images can be collected.

[0133] In the embodiment of the present application, after one area of ​​the battery 500 to be tested is tested, the support 412 can be controlled to move so that the radiation source 420 and the detector 430 are opposite to other areas of the battery 500 to achieve testing.

[0134] In the embodiment of the present application, the target area can be intercepted on the bottom surface detection image, the required area can be intercepted, and the surrounding information-free area can be cropped to improve the image processing efficiency and reduce the image size. Then, the image is contrast enhanced to enhance the grayscale contrast in the image and highlight the area with abnormal glue coating area in the image to obtain a detection image.

[0135] According to some embodiments of the present application, a glue coating detection model is stored in the controller, and step S40 includes configuring the controller to:

[0136] Step S41: input the detection image into the glue coating detection model to obtain the glue coating information of the battery to be tested output by the glue coating detection model.

[0137] In an embodiment of the present application, a plurality of glue types are stored in the glue detection model. After the detection image is input into the glue detection model, the glue information in the detection image can be quickly identified based on the stored glue types.

[0138] According to some embodiments of the present application, Fig.13 This is a training flow chart of the glue detection model in some embodiments of the present application. Fig.13 ,The training process of the glue detection model includes:

[0139] Step S101: obtaining a sample inspection image including the glue coating of a sample battery obtained by photographing under the irradiation of a radiation source.

[0140] Step S102: marking the real glue coating information in the sample detection image.

[0141] Step S103: inputting the sample detection image into the glue coating detection model at the same time to obtain the predicted glue coating information of the sample battery output by the glue coating detection model.

[0142] Step S104: Calculate the loss value based on the actual glue coating information and the predicted glue coating information.

[0143] Step S105: adjusting the parameters of the glue detection model based on the loss value.

[0144] In the embodiment of the present application, not only can the parameters of the glue coating detection model be improved through sample batteries, but also the detection image of the battery 500 to be tested each time can be used to improve the parameters of the glue coating detection model.

[0145] For example, after the detection is completed, the glue coating anomalies in the detection image can be calibrated to facilitate observation and verification by the staff. If errors occur, the parameters of the glue coating detection model can be adjusted according to the errors to form a more accurate glue coating detection model.

[0146] Exemplarily, the glue detection model can continuously learn the grayscale features of the detection image through a convolutional neural network, adjust internal parameters, and improve the glue detection model.

[0147] In the embodiment of the present application, before the test, the defect samples of various sizes and types to be detected can be defined according to the test requirements to make a sample battery, and the real glue information in the sample battery can be marked. Then the sample battery is tested, and the predicted glue information of the sample battery output by the glue detection model is compared with the real glue information, and the parameters of the glue detection model are continuously improved to make the glue detection more accurate.

[0148] According to some embodiments of the present application, Fig.14 This is a control flow chart of the controller of some embodiments of the present application. Fig.14 , step S40 includes configuring the controller to:

[0149] Step S42: based on the detection image, determine the proportion of the abnormal glue coating area of ​​the battery to be tested.

[0150] Step S43: determining the glue coating information of the battery to be tested based on the proportion of the abnormal glue coating area.

[0151] In the embodiment of the present application, the proportion of the abnormal glue coating area is a standard for measuring the abnormal glue coating of the battery 500 to be tested, and the glue coating information of the battery to be tested can be determined according to the proportion of the abnormal glue coating area.

[0152] The proportion of the abnormal glue coating area is the ratio of the abnormal glue coating area detected by the glue coating detection model to the total glue coating area. For example, the total glue coating area can be identified by the detection image, or for the same type of battery, the total glue coating area can be input into the controller.

[0153] According to some embodiments of the present application, see Fig.11 , the controller is also configured to:

[0154] Step S71: In response to the proportion of the abnormal glue coating area being greater than a preset value, determining that the battery to be tested is unqualified.

[0155] In an embodiment of the present application, when the proportion of the abnormal glue coating area is greater than a preset value, it indicates that the glue coating of the battery 500 to be tested is unqualified, which will affect the stability of the battery 500 to be tested, and the battery 500 to be tested is determined to be unqualified.

[0156] According to some embodiments of the present application, see Fig.11 , the controller is also configured to:

[0157] Step S72: In response to the proportion of the abnormal glue coating area being less than or equal to a preset value, determining that the battery to be tested is qualified.

[0158] The controller 450 in the embodiment of the present application can control the battery 500 to be tested to be fully tested, or can detect a specific abnormal point according to the instruction, wherein the position of the abnormal point can be directly input into the controller 450 .

[0159] 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%.

[0160] During the production process of batteries, it is difficult to achieve complete glue coating without defects. If the preset value is set too small, such as less than 10%, too many batteries may be identified as unqualified, affecting the battery production. If the preset value is set too large, such as greater than 25%, the battery will have a large area of ​​abnormal glue coating, affecting the reliability of the battery. Setting the preset value to be greater than or equal to 10% and less than or equal to 25% can improve the reliability of the battery while ensuring the battery production to a certain extent.

[0161] An embodiment of the present application provides a battery production device, comprising the detection device of any one of the above embodiments.

[0162] The battery production equipment includes a detection device 400, which can perform non-destructive testing on the battery 500 to be tested during the production process of the battery 500 to be tested, and timely discover abnormal glue coating of the battery 500 to be tested, so as to eliminate unqualified batteries 500 to be tested and improve the quality of the batteries 500 to be tested.

[0163] The detection device of the present application is further described below in conjunction with a specific embodiment.

[0164] The detection device 400 includes a support frame 410, a radiation source 420, a detector 430 and a carrying platform 440. The support frame 410 includes a C-arm, the radiation source 420 and the detector 430 are respectively connected to the two ends of the C-arm, and the detector 430 is opposite to the emission port of the radiation source 420. The C-arm can rotate around the rotation axis O, so that when rotating, the detector 430 and the emission port of the radiation source 420 remain opposite, and the carrying platform 440 is movably located between the radiation source 420 and the detector 430, and the moving direction of the carrying platform 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°.

[0165] The support frame 410 further includes a support 412 and a connecting arm 413, wherein the connecting arm 413 is connected to the support 412, and the connecting arm 413 has an arc track 4131, and the center of the arc track 4131 is located at the rotation axis O. The outer arc surface of the C-arm has a protrusion 4111 matching the arc track 4131, and the protrusion 4111 is slidably located in the arc track 4131. The support frame 410 may further include a base 414, which is connected to the support 412 via a sliding guide rail, and the moving direction of the support 412 is parallel to the extension direction A of the rotation axis O.

[0166] During the inspection, the scanning can be started from one edge of the battery 500 to be tested. The C-arm completes the inspection of one area by reciprocating at a small angle once, and then moves to inspect another area. It moves according to the set program until the inspection of the battery 500 to be tested is completed, and then the completed pictures are spliced ​​together to form a complete inspection image of the battery 500 to be tested.

[0167] In the embodiment of the present application, the ray source 420 may be a 450KV micro-focus open tube X-ray source, and the detector 430 may be a flat-panel detector. The effective detection area of ​​the flat-panel detector should be greater than 30cm*30cm.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A detection device for detecting battery glue coating, characterized in that: include: A support frame (410) comprising a support arm (411); A ray source (420) connected to the support arm (411); A detector (430) connected to the support arm (411), and the detector (430) is opposite to the emission port of the ray source (420); A carrying platform (440) is located between the ray source (420) and the detector (430), and the carrying platform (440) is used to place the battery (500) to be tested; The ray source (420) and the detector (430) can rotate around the same rotation axis, and the rotation direction of the ray source (420) is the same as the rotation direction of the detector (430), so that during rotation, the detector (430) remains opposite to the emission port of the ray source (420), and the supporting platform (440) is located between the ray source (420) and the detector (430).

2. The detection device according to claim 1, characterized in that: The support arm (411) comprises a C-shaped arm, the ray source (420) is connected to one end of the C-shaped arm, the detector (430) is connected to the other end of the C-shaped arm, and the C-shaped arm can rotate around the rotation axis.

3. The detection device according to claim 2, characterized in that: The support frame (410) further comprises: Support (412); A connecting arm (413) connected to the support (412), wherein the connecting arm (413) has an arc track (4131), and the center of the arc track (4131) is located at the rotation axis; The outer arc surface of the C-arm has a protrusion (4111) matching the arc track (4131), and the protrusion (4111) is slidably located in the arc track (4131).

4. The detection device according to any one of claims 1 to 3, characterized in that: The rotation angle α of the ray source (420) satisfies: 0°<α≤90°.

5. The detection device according to any one of claims 1 to 4, characterized in that: The carrying platform (440) is movably located between the ray source (420) and the detector (430), and the moving direction of the carrying platform (440) is perpendicular to the extending direction of the rotation axis.

6. The detection device according to any one of claims 1 to 5, characterized in that: The detection device also includes: A controller, the ray source is electrically connected and / or communicatively connected to the controller, and the detector is electrically connected and / or communicatively connected to the controller; Wherein, the controller is configured to: Controlling the ray source and the detector to rotate around the rotation axis; When the ray source rotates, the ray source is controlled to emit rays and pass through the battery to be tested located on the carrying platform and project to the detector; Acquiring a detection image of the battery to be tested based on the rays received by the detector; Based on the detection image, the glue coating information of the battery to be tested is determined.

7. The detection device according to claim 6, characterized in that: When the support frame includes a support and a connecting arm, and the support arm includes a C-arm, controlling the radiation source and the detector to rotate around the rotation axis includes configuring the controller to: The C-shaped arm is controlled to slide within the arc track of the connecting arm.

8. The detection device according to claim 7, characterized in that: Controlling the C-arm to slide in the arc track of the connecting arm includes configuring the controller to: Controlling the C-arm to slide in the arc track along a first rotation direction; The C-arm is controlled to slide in the arc track along a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

9. The detection device according to any one of claims 6 to 8, characterized in that: The battery to be tested comprises a bottom surface, the bottom surface has a glue coating area, and the controller is further configured as follows: The bottom surface of the battery to be tested is controlled to fit with the bearing surface of the bearing platform.

10. The detection device according to any one of claims 6 to 9, characterized in that: When the carrying platform is movable along an extension direction perpendicular to the rotation axis, the controller is further configured to: The carrying platform is controlled to move along an extension direction perpendicular to the rotation axis so that the carrying platform is located between the ray source and the detector.

11. The detection device according to any one of claims 6 to 10, characterized in that: Acquiring a detection image of the battery to be tested based on the rays received by the detector, comprising configuring the controller to: collecting a plurality of original images based on the rays received by the detector; Performing three-dimensional reconstruction on the multiple original images to obtain a bottom surface detection image of the battery to be tested, wherein the bottom surface has a glue-coated area; A detection image of the battery to be tested is determined based on the bottom surface detection image.

12. The detection device according to any one of claims 6 to 11, characterized in that: The controller stores a glue coating detection model, and determines the glue coating information of the battery to be tested based on the detection image, including configuring the controller to: The detection image is input into a glue coating detection model to obtain glue coating information of the battery to be tested output by the glue coating detection model.

13. The detection device according to claim 12, characterized in that: The training process of the glue detection model includes: Acquire a sample inspection image including the glue coating of the sample battery obtained by photographing under the irradiation of the ray source; Marking the real glue coating information in the sample detection image; Inputting the sample detection image into the glue coating detection model at the same time to obtain the predicted glue coating information of the sample battery output by the glue coating detection model; Calculating a loss value based on the actual glue coating information and the predicted glue coating information; and Parameters of the glue detection model are adjusted based on the loss value.

14. The detection device according to any one of claims 6 to 13, characterized in that: Based on the detection image, determining the glue coating information of the battery to be tested includes configuring the controller to: Based on the detection image, determining the proportion of the abnormal glue coating area of ​​the battery to be tested; The glue coating information of the battery to be tested is determined based on the proportion of the abnormal glue coating area.

15. The detection device according to any one of claims 6 to 14, characterized in that: The controller is also configured to: In response to the proportion of the abnormal glue coating area being greater than a preset value, it is determined that the battery to be tested is unqualified.

16. The detection device according to claim 15, characterized in that: The preset value is greater than or equal to 10% and less than or equal to 25%.

17. A battery production device, characterized in that: Comprising a detection device as claimed in any one of claims 1 to 16.

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