Detection equipment and battery production equipment

Abstract

The present application provides a detection device 400 and battery production equipment, which belong to the field of battery technology. The detection device 400 includes a scanning frame 410, a radiation source 420, a detector 430, and a mounting stage 440. The radiation source 420 and the detector 430 are both connected to the scanning frame 410, and the detector 430 faces the radiation source 420's exit port. The mounting stage 440 is positioned between the radiation source 420 and the detector 430, where the radiation source 420 and the detector 430 are rotatable around the same axis of rotation, with the direction of rotation of the radiation source 420 being the same as the direction of rotation of the detector 430, and the detector 430 and the radiation source 420's exit aperture facing each other during rotation. The mounting stage 440 is positioned between the radiation source 420 and the detector 430, and is used to mount the battery 500 to be measured. The detection device 400 can detect deformation of the battery 500 to be measured.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application incorporates by reference Chinese patent application No. 202310797652.1, entitled "Detection Device and Battery Production Equipment," filed on June 30, 2023, which is incorporated herein by reference in its entirety. [Technical Field]

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

[0003] Energy conservation and reduced pollutant emissions are key to the sustainable development of the automotive industry, and electric vehicles, with their energy-saving and environmental advantages, have become an important component of this industry. Battery technology is a key element in the development of electric vehicles.

[0004] During battery use, batteries may be bumped or struck, which may lead to battery deformation. The size of the external deformation can be directly measured using tools such as calipers, but it is not possible to know whether deformation appears inside the battery, nor the size of the internal deformation. If the internal deformation is too large, it will affect the safety of the battery. Therefore, how to detect internal deformation of a battery is an issue that needs to be resolved as soon as possible. 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 objective of the present application is to provide a detection device for detecting deformation inside a battery and a battery production equipment.

[0006] An embodiment of a first aspect of the present application provides a detection device for detecting deformation of a battery, the detection device including a scanning frame, a radiation source connected to the scanning frame, a detector connected to the scanning frame and facing the radiation source's exit port, and a mounting stage located between the radiation source and the detector and for placing a battery to be measured, wherein the radiation source and the detector are rotatable around the same rotation axis, the rotation direction of the radiation source is the same as the rotation direction of the detector, and during rotation, the detector and the radiation source's exit port are kept facing each other, and the mounting stage is located between the radiation source and the detector.

[0007] In the technical solution of the embodiments of the present application, when using the detection device according to the embodiments of the present application, the battery to be measured is placed on a mounting stage, and the radiation source emits radiation that passes through the battery to be measured located on the mounting stage and projects it onto the detector, thereby realizing scanning detection of the battery to be measured, and the radiation source and the detector are controlled to rotate around the rotation axis during detection, so that the radiation source and the detector can detect around the battery to be measured during rotation, making the detection more comprehensive and avoiding to some extent the situation of missing inspection. After the battery to be measured is detected, the deformation status of the battery to be measured can be obtained based on the detection image, thereby realizing comprehensive detection of the deformation of the battery to be measured.

[0008] In some embodiments, the scanning frame includes a base having a mounting groove and a scanning ring at least partially located within the mounting groove and rotatable about a rotation axis, wherein the source and detector are both connected to the scanning ring and are located at opposite ends of a diameter of the scanning ring. The scanning frame is configured as a base and scanning ring, with the source and detector located at opposite ends of a diameter of the scanning ring, respectively. The relative positions of the source and detector do not change when the scanning ring rotates, so that the detector always faces the source exit port during rotation. The source and detector are rotated by controlling the rotation of the scanning ring. Because the relative positions of the source and detector are fixed, it is only necessary to rotate the scanning circle, and there is no need to consider the rotation speed and direction of the source and detector. However, to control the source and detector independently, the rotation speed and direction of the source and detector must be considered. That is, the embodiments of the present application control the rotation of the source and detector by controlling the scanning ring, which is more convenient.

[0009] In some embodiments, the scanning frame further includes a support wheel located in the mounting groove and connected to the base, and the outer ring of the scanning ring abuts against the support wheel. The support wheel separates the base and the scanning ring, and when the scanning ring rotates, the support wheel rolls, which can change the sliding friction between the base and the scanning ring into rolling friction between the support wheel and the scanning ring, thereby reducing the friction force and making the scanning ring rotate more smoothly.

[0010] In some embodiments, the rotation angle α of the radiation source satisfies α≧180°. Because the radiation emitted from the radiation source can penetrate both opposing surfaces of the battery to be measured during detection, by limiting the rotation angle of the radiation source to α≧180°, it is possible to detect as many parts of the battery to be measured as possible, to some extent avoid the possibility of missing an inspection, and to improve the accuracy of deformation detection.

[0011] In some embodiments, the mounting stage is movably located between the radiation source and the detector, and the direction of movement of the mounting stage is parallel to the direction in which the rotation axis extends. The mounting stage is movably located between the radiation source and the detector, and by moving the mounting stage, continuous detection of the cells can be realized and detection efficiency can be improved.

[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, so that the radiation passes through a battery to be measured located on a mounting stage and projects onto the detector; obtain a detected image of the battery to be measured based on the radiation received by the detector; and determine deformation information of the battery to be measured based on the detected image. The method according to the embodiments of the present application can detect deformation of the battery to be measured and realize automatic detection.

[0013] In some embodiments, when the scanning frame includes a base and a scan ring, controlling the source and the detector to rotate about the rotation axis includes configuring the controller to: control the scan ring to rotate about the rotation axis: Because the source and the detector are both connected to the scan ring, the rotation of the source and the detector can be achieved by controlling the scan ring to rotate about the rotation axis.

[0014] In some embodiments, the battery to be measured includes a bottom surface, the bottom surface having an adhesive application area, and the controller is further configured to control the bottom surface of the battery to be measured to be bonded to the mounting surface of the mounting stage. By bonding the bottom surface of the battery to be measured to the mounting surface of the mounting stage, the state of the battery to be measured at the time of detection can be made the same as the state when loaded into a vehicle, and it is possible to some extent to prevent unforeseen defects such as internal structural misalignment caused by leaving the battery to be measured upright or rotating it, which can affect its reliability.

[0015] In some embodiments, when the mounting stage is movable along the extension direction of the rotation axis, the controller is further configured to control the mounting stage to move along the extension direction of the rotation axis, and position the mounting stage between the radiation source and the detector. By positioning the mounting stage between the radiation source and the detector, radiation emitted from the radiation source can be projected onto the detector through a measurement-ready cell located on the mounting stage.

[0016] In some embodiments, obtaining a detection image of the battery to be measured based on the radiation received by the detector includes configuring the controller to: collect a plurality of original images based on the radiation received by the detector, perform three-dimensional reconstruction on the plurality of original images to obtain a plurality of cross-sectional detection images of the battery to be measured, the cross sections on which the plurality of cross-sectional detection images are located are parallel and arranged at intervals in sequence along the extension direction of the rotation axis, and determine the detection image of the battery to be measured based on the plurality of cross-sectional detection images. The above method can obtain a clearer detection image and make it easier to identify the deformation amount of the battery to be measured.

[0017] In some embodiments, determining a detected image of the battery to be measured based on the plurality of cross-sectional detection views includes configuring the controller to: perform a blurring process on each cross-sectional detection view of the plurality of cross-sectional detection views to obtain a plurality of first images; perform a convolution process on each first image of the plurality of first images to obtain a plurality of second images; and perform an enhancement process on each second image of the plurality of second images to obtain a detected image of the battery to be measured. By processing the images in the above manner, deformation of the battery to be measured can be more easily identified from a contour edge of the battery to be measured in the detected image.

[0018] In some embodiments, the distance between any two adjacent cross-section detection images among the multiple cross-section detection images is greater than or equal to 0.05 mm and less than or equal to 0.5 mm. If the distance between any two adjacent cross-section detection images is set too small, for example, less than 0.05 mm, too many cross-section detection images will be processed, resulting in more subsequent calculation steps and affecting detection efficiency. If the distance between any two adjacent cross-section detection images is set too large, for example, greater than 0.5 mm, the portion with the largest deformation will be skipped, resulting in a relatively large error in the determined maximum deformation amount, which may affect detection accuracy. The range set in the embodiments of the present application can also avoid skipping the maximum deformation amount to some extent and improve detection accuracy, on the premise of improving detection efficiency.

[0019] In some embodiments, determining deformation information of the battery to be measured based on the detected image includes further configuring the controller to: determine the deformation amount of the battery to be measured based on the detected image; and determine the deformation information of the battery to be measured based on the deformation amount. The deformation amount of the battery to be measured is a standard for measuring whether the battery to be measured has passed deformation detection, and the deformation information of the battery to be measured can be determined according to the deformation amount.

[0020] In some embodiments, determining the deformation amount of the battery-to-be-measured based on the detected image includes further configuring the controller to: identify a bottom surface of the battery-to-be-measured in the detected image, determine a distance between the bottom surface and a battery cell in the battery-to-be-measured, and determine the deformation amount of the battery-to-be-measured based on the distance. When the interior of the battery-to-be-measured is deformed, the distance between the bottom surface and the battery cell in the battery-to-be-measured increases, and the deformation amount of the battery-to-be-measured can be determined based on the distance between the bottom surface and the battery cell in the battery-to-be-measured.

[0021] In some embodiments, the controller is further configured to: determine that the battery to be measured is unacceptable in response to the amount of deformation being greater than a preset value: if the amount of deformation is greater than the preset value, it is interpreted as the deformation of the battery to be measured being too large, which will affect the stability of the battery to be measured, and determine that the battery to be measured is unacceptable;

[0022] In some embodiments, the preset value is greater than or equal to 1 millimeter and less than or equal to 3 millimeters. A relatively small amount of battery deformation has a relatively small impact on battery reliability. If the preset value is set too small, for example, less than 1 millimeter, too many batteries will be rejected, which may affect battery production. If the preset value is set too large, for example, greater than 3 millimeters, the battery deformation will be relatively large, which may affect battery reliability. Setting the preset value to greater than or equal to 1 millimeter and less than or equal to 3 millimeters can improve battery reliability while ensuring battery production to a certain extent.

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

[0024] The above description is merely an outline of the technical solution of the present application. In order to enable the technical means of the present application to be more clearly understood, to 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 apparent, the following particularly cites specific embodiments of the present application for description.

[0025] In the drawings, unless otherwise specified, the same reference numerals represent the same or similar parts or elements throughout the drawings. The drawings are not necessarily drawn to scale. It should be understood that these 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. In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that may be used in the embodiments of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without any creative effort. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Figure 2] FIG. 1 is an exploded view of a battery according to some embodiments of the present application. [Figure 3] 1 is a front view of a detection device according to some embodiments of the present application; [Figure 4] FIG. 1 is a front view of a support wheel according to some embodiments of the present application. [Figure 5] FIG. 2 is a front view of a detection device according to some embodiments of the present application in another state. [Figure 6] FIG. 2 is a front view of a detection device according to some embodiments of the present application in another state. [Figure 7] FIG. 1 is a block diagram of a detection device according to some embodiments of the present application. [Figure 8] 1 is a control flowchart of a controller according to some embodiments of the present application. [Figure 9]1 is a control flowchart of a controller according to some embodiments of the present application. [Figure 10] 1 is a control flowchart of a controller according to some embodiments of the present application. [Figure 11] 1 is a control flowchart of a controller according to some embodiments of the present application. [Figure 12] 1 is a control flowchart of a controller according to some embodiments of the present application. [Figure 13] 1 is a control flowchart of a controller according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following describes in detail the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are merely examples, which do not limit the protection scope of the present application.

[0028] 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 of this application, and the terms used herein are only for describing specific embodiments and are not intended to limit this application. The terms "comprises" and "having" and any variations thereof in the specification and claims of this application and the description of the drawings above are intended to cover a non-exclusive "comprise."

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only for distinguishing different objects, and should not be understood as indicating or implying relative importance, or the number, specific order, or hierarchical relationship of the technical features shown. In the description of the embodiments of the present application, unless otherwise clearly and specifically limited, the meaning of "plurality" is two or more.

[0030] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various locations throughout the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, independent, or alternative embodiments. Those skilled in the art can explicitly or implicitly understand that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments of this application, the term "and / or" is merely a relation that describes related objects and indicates that three relations may exist. For example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. In addition, the character " / " in this specification generally indicates that the related objects before and after are in an "or" relationship.

[0032] In describing the embodiments of the present application, the term "plurality" refers to two or more (including two); similarly, "sets" refers to two or more (including two sets); and "plurality" refers to two or more (including two).

[0033] In describing the embodiments of the present application, the 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 shown in the drawings, and are intended only for the convenience and simplification of the description of the embodiments of the present application. They do not indicate or imply that the referred devices or elements must have a specific orientation or be configured and operated in a specific orientation, and therefore should not be understood as limitations of the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical terms "attached," "connected," "connected," "fixed," etc. 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, 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.

[0035] At present, from the viewpoint of the development of the market situation, the application of power batteries is becoming more and more widespread. Power batteries are not only applied to energy storage power systems such as hydroelectric power, thermal power, wind power and solar power plants, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles and electric cars, as well as in military equipment and aerospace, among other fields. As the application fields of power batteries continue to expand, their market demand is also constantly expanding.

[0036] During use, batteries may be bumped or struck, which can lead to external deformation of the battery. If the deformation is too large, it may also cause internal deformation. The external deformation of a battery can be directly observed, and the magnitude of the deformation can be measured using measuring tools such as calipers. However, the internal deformation of a battery cannot be directly observed, and the magnitude of the internal deformation cannot be known. If the magnitude of the internal deformation is relatively small, it will not affect the reliability of the battery and it can continue to be used. However, if the magnitude of the internal deformation is too large, it may affect the reliability of the battery. After the external deformation of a battery occurs, it is impossible to know the internal deformation, so directly disposing of the battery results in a relatively large waste. Continued use may result in excessive internal deformation, which may affect the reliability of the battery.

[0037] An embodiment of the present application provides a detection device, in which a battery to be measured is placed on a mounting stage, and radiation emitted from a radiation source passes through the battery to be measured on the mounting stage and is projected onto a detector. By rotating the radiation source and the detector, detection of the entire battery to be measured is achieved as the radiation source and the detector rotate, thereby achieving comprehensive detection of battery deformation.

[0038] The detection device and battery production equipment disclosed in the embodiments of the present application may be used in the production and manufacturing stage of batteries, and the detected or produced batteries may be used in power consuming devices such as, but not limited to, vehicles, ships, and aircraft, etc. The batteries disclosed in the present application can be used to configure the power supply system of the power consuming devices.

[0039] An embodiment of the present application provides a power-consuming device that uses a battery as a power source, and the power-consuming device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a steamship, 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 steamship toy, and an electric airplane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0040] For convenience of explanation, the following embodiment will be described by taking an example in which the power consumption device of one embodiment of the present application is a vehicle 1000.

[0041] 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 gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, 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 1000 to power the motor 300, for example, for starting the vehicle 1000, navigation, and operating power consumption needs during driving.

[0042] In some embodiments of the present application, the battery 100 may be used not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, providing driving power to the vehicle 1000 in place of or in place of fuel oil or natural gas.

[0043] 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 may 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 which collectively 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, and the first part 11 is placed over the open side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodation space, and the first part 11 and the second part 12 may both have a hollow structure with one end open, and the open side of the first part 11 is placed over 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.

[0044] 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. A series-parallel connection means that the plurality of battery cells 20 are connected in both series and parallel. The plurality of battery cells 20 may be directly connected in series, in parallel, or in series-parallel, and the entire battery cell set may be housed within the housing 10. Of course, the battery 100 may first be configured in the form of a battery module by connecting the plurality of battery cells 20 in series, in parallel, or in series-parallel, and then the plurality of battery modules may be further connected in series, in parallel, or in series-parallel to form a whole battery set housed within the housing 10. The battery 100 may further include other structures, for example, the battery 100 may further include bus bar members for realizing electrical connection between the plurality of battery cells 20.

[0045] 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.

[0046]

[0033] The present application provides a detection device for detecting deformation of a battery, and Fig. 3 is a front view of the detection device of some embodiments of the present application. Referring to Fig. 3, the detection device 400 includes a scanning frame 410, a radiation source 420, a detector 430, and a mounting stage 440. The radiation source 420 and the detector 430 are both connected to the scanning frame 410, and the detector 430 faces the radiation source 420's exit port. The mounting stage 440 is located between the radiation source 420 and the detector 430, and the radiation source 420 and the detector 430 are rotatable around the same rotation axis O, with the radiation source 420 rotating in the same direction as the detector 430. During rotation, the detector 430 and the radiation source 420's exit port remain facing each other, and the mounting stage 440 is located between the radiation source 420 and the detector 430. For ease of interpretation, FIG. 3 also shows a battery 500 waiting to be measured, and the mounting stage 440 is used to place the battery 500 waiting to be measured.

[0047] The scanning 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. It may be used to fix the radiation source 420 and the detector 430, and after the radiation source 420 and the detector 430 are mounted on the scanning frame 410, the detector 430 can face the exit port of the radiation source 420, so that the radiation emitted from the radiation source 420 can pass through the cell-to-be-measured 500 on the mounting stage 440 and be projected onto the detector 430, thereby realizing detection of the cell-to-be-measured 500.

[0048] The radiation source 420 is a device for emitting detection radiation, and mainly includes a radiation tube, a cooling system, and a corresponding control system. The detection radiation may be X-rays or other radiation, and the radiation tube may emit corresponding detection radiation, such as an X-ray tube or a gamma-ray tube. In one example, the radiation source 420 is an electron linear accelerator, and the detection radiation emitted therefrom is X-rays. When the detection radiation emitted from the radiation source 420 passes through the measurement-ready battery 500, there are differences in the thickness or material of different regions of the measurement-ready battery 500, resulting in different X-ray absorption rates, and therefore the detection can be detected based on the difference in the degree of X-ray absorption.

[0049] The radiation emitted from the radiation source 420 is 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-induced luminescent material that can emit visible light signals under radiation excitation. The visible light signals are transmitted to a photoelectric converter to form electrical signals, which are then output as digital signals via an internal electrical signal transmission circuit, characterizing the image by forming light-dark contrasts. The radiation undergoes a certain attenuation after passing through the object being detected; the more radiation passes through, the greater the luminescence signal from the photosensitive material, resulting in a brighter area in the final image. Conversely, the less radiation passes through, the darker the area in the image. The detector 430 may be a flat panel detector or a linear array detector; this is not a limitation of the embodiments of the present application.

[0050] The mounting stage 440 may be any mounting structure and may fix the battery 500 to be measured by a supporting or clamping method, such as a tray or a gripper. The mounting stage 440 may be fixed or movable, for example, a tray or clamping mechanism that is installed on a transport track and moves along the transport track. The number of batteries 500 to be measured placed on the mounting stage 440 may be one or more. In one example, the mounting stage 440 may include multiple trays, each of which carries one or more batteries 500 to be measured. The battery 500 to be measured may be a battery 100 including multiple battery cells 20.

[0051] In the embodiment of the present application, the load of the mounting stage 440 is greater than the weight of the battery 500 waiting to be measured that is left there.

[0052] In the embodiment of the present application, the thickness of each region of the mounting stage 440 is equal, which reduces the influence on the detection results.

[0053] In an embodiment of the present application, the source 420 and the detector 430 are rotatable about the same axis of rotation O, and the source 420 and the detector 430 may rotate on the scanning frame 410, or the scanning frame 410 may rotate to rotate the source 420 and the detector 430.

[0054] 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 stage 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 pass through the measurement-ready cell 500 on the mounting stage 440 and be projected onto the detector 430. As shown in Fig. 3, the rotation axis O may be positioned on the mounting surface of the mounting stage 440, so that when the radiation source 420 and the detector 430 rotate, the mounting stage 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.

[0055] Here, the rotation axis O is an imaginary line, not a line that actually exists, and in FIG. 3, the rotation axis O is perpendicular to the plane of the drawing, so in FIG. 3, the rotation axis O is represented by a dot.

[0056] When using the detection device according to the embodiment of the present application, the battery to be measured 500 is placed on the mounting stage 440, and the radiation source 420 emits radiation that passes through the battery to be measured 500 located on the mounting stage 440 and projects it onto the detector 430, thereby achieving scanning detection of the battery to be measured 500. During detection, the radiation source 420 and the detector 430 are controlled to rotate around the rotation axis O, so that the radiation source 420 and the detector 430 can detect around the battery to be measured 500 during rotation, making the detection more comprehensive and preventing missed inspections to some extent. After the battery to be measured 500 is detected, the deformation of the battery to be measured 500 can be obtained based on the detection image, thereby achieving comprehensive detection of the deformation of the battery to be measured 500.

[0057] When detecting the battery 500 to be measured, the detection device according to the embodiment of the present application does not need to disassemble the battery 500 to be measured, and can realize non-destructive detection of the battery 500 to be measured.

[0058] According to some embodiments of the present application, referring to FIG. 3 , a scan frame 410 includes a base 411 and a scan ring 412, the base 411 has a mounting groove 4111, at least a portion of the scan ring 412 is positioned in the mounting groove 4111, and the scan ring 412 is rotatable around a rotation axis O, wherein a source 420 and a detector 430 are both connected to the scan ring 412, and the source 420 and the detector 430 are positioned at opposite ends of one diameter of the scan ring 412.

[0059] The base 411 provides support to the entire detection device and improves the stability of the entire detection device. The material of the base 411 is not limited, and may be metal or non-metal.

[0060] As shown in FIG. 3, the cross-sectional shape of the mounting groove 4111 is hexagonal and symmetrically distributed; in other implementations, the cross-section of the mounting groove 4111 may be other shapes, such as circular, rectangular, etc.

[0061] The scan ring 412 is rotatable in a circular fashion, and may rotate counterclockwise or clockwise. The source 420 and the detector 430 are located at opposite ends of a diameter of the scan ring 412, and radiation emitted from the source 420 can be projected onto the detector 430.

[0062] In the embodiment of the present application, the scanning frame 410 is configured in the form of a base 411 and a scanning ring 412, and the source 420 and the detector 430 are respectively disposed at opposite ends of one diameter of the scanning ring 412. When the scanning ring 412 rotates, the relative positions of the source 420 and the detector 430 do not change, so that the detector 430 always faces the exit port of the source 420 during rotation. The source 420 and the detector 430 are rotated by controlling the rotation of the scanning ring 412. Because the relative positions of the source 420 and the detector 430 are fixed, it is only necessary to rotate the scanning ring 412, and there is no need to consider the rotation speed and direction of the source 420 and the detector 430. However, to control the source 420 and the detector 430 independently, the rotation speed and direction of the source 420 and the detector 430 must be considered. That is, in the embodiment of the present application, the rotation of the source 420 and the detector 430 is controlled by controlling the scanning ring 412, which is more convenient.

[0063] According to some embodiments of the present application, referring to FIG. 3 , the scanning frame 410 further includes a support wheel 413, which is positioned in the mounting groove 4111 and connected to the base 411, and the outer ring of the scanning ring 412 abuts against the support wheel 413.

[0064] In the embodiment of the present application, the outer ring of the scanning ring 412 abuts against the support ring 413, so that the support ring 413 can provide support for the scanning ring 412, and when the scanning ring 412 rotates, the support ring 413 can rotate without affecting the rotation of the scanning ring 412.

[0065] In some embodiments of the present application, the support ring 413 may be directly glued onto the inner wall of the mounting groove 4111, or the support ring 413 may be fixedly connected to the inner wall of the mounting groove 4111 by screws.

[0066] 3, one support ring 413 is disposed symmetrically on each of the four inner walls of the mounting groove 4111, which evenly distributes the support force of the scanning ring 412 and improves the stability of the scanning ring 412. In other implementations, the position and number of the support rings 413 may be configured in other ways, and the embodiments of the present application are not limited thereto.

[0067] In the embodiment of the present application, the support wheel 413 separates the base 411 and the scanning ring 412. When the scanning ring 412 rotates, the support wheel 413 rolls, which can change the sliding friction between the base 411 and the scanning ring 412 into rolling friction between the support wheel 413 and the scanning ring 412, thereby reducing the frictional force and making the rotation of the scanning ring 412 smoother.

[0068] 4 is a front view of a support ring in some embodiments of the present application. The support ring 413 includes a support block 4131 and a roller 4132. A part of the roller 4132 is located within the support block 4131, and another part of the roller 4132 protrudes outside the support block 4131. The roller 4132 is rollable. The support block 4131 is used to connect the base 411. The roller 4132 rolls when the scanning ring 412 rotates, to avoid affecting the rotation of the scanning ring 412.

[0069] In some other embodiments of the present application, the support ring 413 may only include a roller, and the side wall of the mounting groove 4111 has a groove, a part of the roller is located in the groove, and another part of the roller protrudes out of the groove, and the roller is rotatable, and the roller abuts against the outer ring of the scanning ring 412. That is, the support block 4131 is directly omitted, making the structure of the detection device simpler.

[0070] According to some embodiments of the present application, the rotation angle α of the source 420 satisfies α≧180°.

[0071] FIG. 5 is a front view of a detection device in another state according to some embodiments of the present application. FIG. 6 is a front view of a detection device in another state according to some embodiments of the present application. Here, the detection device shown in FIG. 5 is obtained after the scanning ring 412 in the detection device shown in FIG. 3 is rotated by a certain angle β, and the detection device shown in FIG. 6 is obtained after the scanning ring 412 is further rotated by a certain angle along the rotation direction A. Here, the detection device shown in FIG. 6 is obtained after the scanning ring 412 in the detection device shown in FIG. 3 is rotated a total of α. It should be noted that in FIGS. 5 and 6, the mounting stage 440 and the measurement-ready battery 500 are omitted in order to clarify the rotation angle of the detection device.

[0072] In the embodiment of the present application, the scan ring 412 is rotatable back and forth, and thus the source 420 is rotatable along two opposite rotational directions.

[0073] In the embodiments of the present application, the rotation angle α of the radiation source 420 refers to the maximum angle through which the radiation source 420 rotates during detection, not the maximum angle through which the radiation source 420 itself can rotate. Not all angles through which the scan ring 412 rotates during detection are necessarily 180° or greater. Taking Figures 3, 5, and 6 as examples, if α=180°, Figure 3 shows the state before detection begins, and Figure 6 shows the maximum angle through which the scan ring 412 rotates during detection. Although the maximum angle is equal to 80° at this time, the scan ring 412 in the detection device shown in Figure 6 can still rotate in the direction A. Figure 5 shows an intermediate state, where β<180°, and the angle through which the scan ring 412 rotates during detection may be less than 180°.

[0074] The detection device of the embodiment of the present application detects the deformation of the battery to be measured 500, and the deformation of the battery to be measured 500 may exist in any part of the battery to be measured 500. During detection, the radiation emitted from the radiation source 420 can penetrate both opposing surfaces of the battery to be measured 500, so by limiting the rotation angle of the radiation source 420 to α≧180°, it is possible to detect as many parts of the battery to be measured 500 as possible, thereby avoiding the possibility of missing inspection to some extent and improving the accuracy of deformation detection.

[0075] According to some embodiments of the present application, the mounting stage 440 is movably located between the source 420 and the detector 430, and the direction of movement of the mounting stage 440 is parallel to the direction in which the rotation axis O extends.

[0076] In other implementations of the present application, the mounting stage 440 may be a conveyor belt, or the mounting stage 440 may be a circular guide rail, or the like.

[0077] For example, when the mounting stage 440 is a circular guide rail, the tray on the circular guide rail may be made of carbon fiber material, which can reduce the influence on detection.

[0078] The detection device according to the embodiment of the present application may be performed after the flow of battery fabrication is completed, and the fabricated battery is directly transported between the radiation source 420 and the detector 430 via the mounting stage 440 to achieve detection, and after detection is completed, it is transported to the next stage via the mounting stage 440. In another implementation, the battery 500 to be measured may be moved onto the mounting stage 440 by a mechanical handrail or a crane.

[0079] The direction of movement of the mounting stage 440 is parallel to the direction A in which the rotation axis O extends, and the movement of the mounting stage 440 does not interfere with the scanning ring 412.

[0080] In the embodiment of the present application, the mounting stage 440 is movably located between the radiation source 420 and the detector 430, and by moving the mounting stage 440, continuous detection of the cells can be realized and the detection efficiency can be improved.

[0081] 7 is a block diagram of a detection apparatus according to some embodiments of the present application, the detection apparatus further including a controller 450, the source 420 being electrically and / or communicatively coupled to the controller 450, and the detector 430 being electrically and / or communicatively coupled to the controller 450.

[0082] 8 is a control flowchart of the controller of some embodiments of the present application. Referring to FIG. 8, the controller 450 is configured as follows.

[0083] Step S10: The radiation source and the detector are controlled to rotate around the rotation axis.

[0084] Step S20: When the radiation source rotates, the radiation source is controlled so that it emits radiation and passes through the cell to be measured located on the mounting stage and projects it onto the detector.

[0085] Step S30: Obtain a detected image of the battery to be measured based on the radiation received by the detector.

[0086] Step S40: Based on the detected image, deformation information of the battery waiting to be measured is determined.

[0087] 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 commands based on the instructions.

[0088] In an embodiment of the present application, in order to reduce errors in the detected image, the detector 430 may be calibrated before starting detection. For example, the detector 430 needs to be calibrated before regular operation. Before calibration, it is necessary to ensure that the exit port of the radiation source 420 and the surface of the detector 430 are free of impurities, and that there is no obstruction between the radiation source 420 and the detector 430. It is required that the radiation completely covers the receiving surface of the detector 430, and at this time, the imaging grayscale value of the detection device can be adjusted to the calibration grayscale value.

[0089] For example, when detecting the battery to be measured 500 using the detection device, the battery to be measured 500 may be placed on the mounting stage 440 so that the wide surface of the battery to be measured 500 is aligned with the mounting surface of the mounting stage 440, i.e., so that the thickness direction of the battery to be measured 500 is perpendicular to the mounting surface, and the radiation source 420 and the detector 430 may then be used to detect the battery to be measured 500.

[0090] In an embodiment of the present application, the deformation information of the battery to be measured 500 may be used to indicate whether the deformation of the battery to be measured 500 is acceptable.

[0091] In an embodiment of the present application, if there is a deformation inside the measurement-waiting battery 500, the boundary of the deformed portion is changed, and the deformation information of the measurement-waiting battery 500 can be determined by observing the boundary change of the deformed portion in the detection image.

[0092] The method according to the embodiment of the present application can detect the deformation of the battery waiting to be measured 500 and realize automatic detection.

[0093] According to some embodiments of the present application, when the scan frame 410 includes a base 411 and a scan ring 412, step S10 includes configuring the controller as follows.

[0094] Step S11: The scanning ring is controlled to rotate around the rotation axis.

[0095] In the embodiment of the present application, since both the source 420 and the detector 430 are connected to the scan ring 412, the rotation of the source 420 and the detector 430 can be realized by controlling the scan ring 412 to rotate around the rotation axis O.

[0096] In some embodiments of the present application, the scanning frame 410 may be electrically and / or communicatively connected to a controller 450, and the sliding of the scanning frame 410 may be controlled by the controller 450.

[0097] According to some embodiments of the present application, the battery 500 to be measured includes a bottom surface, and the bottom surface has an adhesive application area. Figure 9 is a control flowchart of a controller according to some embodiments of the present application. Referring to Figure 9, the controller 450 is further configured as follows:

[0098] Step S50: Control is performed so that the bottom surface of the battery waiting to be measured is bonded to the mounting surface of the mounting stage.

[0099] The shape of the battery-to-be-measured 500 resembles a rectangular parallelepiped, and the battery-to-be-measured 500 has two wide surfaces that are opposite to each other and four side surfaces that are connected to the two wide surfaces. The wide surfaces are the top and bottom surfaces of the battery-to-be-measured, and the top and bottom surfaces are located in the first and second portions 11 and 12 of the housing 10, respectively. The bottom surface has an adhesive application area, and adhesive for adhering the battery cells is provided in the adhesive application area. The bottom surface of the battery-to-be-measured 500 can be identified by the adhesive application area. For example, if the bottom surface is located in the second portion 12, the second portion 12 also has an adhesive application area.

[0100] In the embodiment of the present application, the bottom surface of the battery 500 waiting to be measured is bonded to the mounting surface of the mounting stage, so that the state in which the battery 500 waiting to be measured is detected can be made the same as the state in which it is loaded into a vehicle, and unforeseen defects such as internal structural misalignment caused by leaving the battery 500 waiting to be measured upright or rotating it can be avoided to some extent, which would affect its reliability.

[0101] According to some embodiments of the present application, when the mounting stage is movable along the direction in which the rotation axis O extends, referring to FIG. 9, the controller is further configured as follows.

[0102] Step S60: The mounting stage is controlled to move along the direction in which the rotation axis extends, and the mounting stage is positioned between the radiation source and the detector.

[0103] The mounting stage 440 is positioned between the radiation source 420 and the detector 430 , and radiation emitted from the radiation source 420 can be projected onto the detector 430 through a cell waiting to be measured located on the mounting stage 440 .

[0104] In some embodiments of the present application, the mounting stage 440 may be electrically and / or communicatively coupled to a controller 450 , enabling the controller 450 to control the movement of the mounting stage 440 .

[0105] According to some embodiments of the present application, Figure 10 is a control flowchart of a controller of some embodiments of the present application. Step S30 includes configuring the controller as follows:

[0106] Step S31: Collect a plurality of original images based on the radiation received by the detector.

[0107] Step S32: Three-dimensional reconstruction is performed on the multiple original images to obtain multiple cross-sectional detection images of the battery waiting to be measured, and the cross sections on which the multiple cross-sectional detection images are located are parallel and arranged at intervals along the extension direction of the rotation axis.

[0108] Step S33: A detection image of the battery waiting to be measured is determined based on the multiple cross-sectional detection images.

[0109] In the embodiment of the present application, the original image is an unprocessed image, and the battery 500 to be measured in the image at this time is not clear enough. After processing multiple original images, the battery 500 to be measured in the image becomes clearer, and the deformation status of the battery 500 to be measured can be more easily identified.

[0110] Since multiple original images are collected by the radiation source 420 and the detector 430 during the rotation process, an image of the entire battery waiting to be measured 500 can be obtained by performing three-dimensional reconstruction on the multiple original images.

[0111] In the embodiment of the present application, since the deformation during use of the battery to be measured 500 is generally in the form of pits, the detection of the deformation amount mainly involves measuring the depth of the pits. Since it is not easy to measure the deformation amount of the battery to be measured 500 in a three-dimensional image, i.e., it is not possible to determine whether the deformation of the battery to be measured is too large, a cross-sectional detection diagram of the battery to be measured is determined based on the three-dimensional image, and the cross-sectional detection diagram is a two-dimensional image, which makes it easier to identify the depth of the pits in the two-dimensional image, i.e., to measure the deformation amount of the battery to be measured.

[0112] During the use of the battery, the bottom of the battery is easily deformed by impact, so more attention must be paid to the bottom of the battery when detecting. During detection, the bottom of the battery to be measured 500 is attached to the mounting surface of the mounting stage 440, so the rotation axis O is located on the mounting surface of the mounting stage 440, and the cross sections located in the multiple cross-sectional detection images are arranged at intervals along the extension direction of the rotation axis O. This means that the cross-sectional detection images are perpendicular to the bottom surface of the battery to be measured 500, and by obtaining information about the bottom of the battery to be measured 500 in each cross-sectional detection image, the deformation of the bottom surface of the battery to be measured 500 can be determined.

[0113] In the embodiment of the present application, the above method can obtain a clearer detection image, and the deformation amount of the battery waiting to be measured can be more easily identified.

[0114] In the embodiment of the present application, the number of original images collected of the battery to be measured 500 can be set according to demand. The more original images collected, the more accurate the image of the battery to be measured obtained by 3D reconstruction, and the more accurate the detection result.

[0115] In the embodiment of the present application, target area cropping is performed on the cross-section detection image, to crop the necessary area and cut off the surrounding information-free area, which can improve the image processing efficiency and reduce the residual size of the image.

[0116] According to some embodiments of the present application, Figure 11 is a control flowchart of a controller of some embodiments of the present application. Step S33 includes configuring the controller as follows:

[0117] Step S331: A blurring process is performed on each of the plurality of cross-section detection images to obtain a plurality of first images.

[0118] Step S332: A convolution process is performed on each of the plurality of first images to obtain a plurality of second images.

[0119] Step S333: The enhancement process is performed on each of the second images among the plurality of second images to obtain a detected image of the battery waiting to be measured.

[0120] In the embodiment of the present application, the blurring process removes unnecessary features in the cross-sectional detection image, such as noise, interference lines, etc., and also removes interference parts outside the battery to be measured, thereby making the necessary features in the first image clearer and improving defect identification.

[0121] In the embodiment of the present application, the convolution traverses all pixel points in the first image with one template, and replaces the value of the central pixel point of the template with the weighted average grayscale value of the pixels in the neighborhood determined by the template, so that the defect features in the second image after the convolution process become more obvious and easier to identify.

[0122] In the embodiment of the present application, the enhancement is to increase the brightness and contrast of the second image to highlight the contour edges of the battery cells in the battery waiting to be measured.

[0123] By processing the image in the above manner, deformation of the battery-to-be-measured 500 can be more easily identified from the contour edge of the battery-to-be-measured in the detected image.

[0124] According to some embodiments of the present application, the distance between any two adjacent cross-section detection views among the plurality of cross-section detection views is equal to or greater than 0.05 mm and equal to or less than 0.5 mm.

[0125] If the battery 500 to be measured has a pit, the depth (deformation amount) of each point in the pit is not necessarily the same. After dividing the three-dimensional image of the battery to be measured into multiple cross-sectional detection images, there is one deformation amount at a corresponding position on each cross-sectional detection image, and the deformation amount with the largest numerical value among the multiple deformation amounts is the maximum deformation amount of the battery 500 to be measured.

[0126] In the embodiments of the present application, if the distance between any two adjacent cross-section detection images is set too small, for example, smaller than 0.05 mm, too many cross-section detection images will be processed, resulting in more subsequent calculation steps and affecting detection efficiency; if the distance between any two adjacent cross-section detection images is set too large, for example, larger than 0.5 mm, the part with the largest deformation will be skipped, and the error in the determined maximum deformation amount will be relatively large, which may affect detection accuracy. The range set in the embodiments of the present application can also avoid skipping the maximum deformation amount to some extent and improve detection accuracy, on the premise of improving detection efficiency.

[0127] 12 is a control flowchart of a controller of some embodiments of the present application. Step S40 includes further configuring the controller as follows:

[0128] Step S41: The deformation amount of the battery waiting for measurement is determined based on the detected image.

[0129] Step S42: The deformation information of the battery waiting for measurement is determined based on the amount of deformation.

[0130] In the embodiment of the present application, the deformation amount of the battery to be measured is the standard for measuring whether the battery to be measured 500 passes deformation detection, and the deformation information of the battery to be measured can be determined according to the deformation amount.

[0131] 13 is a control flowchart of a controller of some embodiments of the present application. Step S41 includes further configuring the controller as follows:

[0132] Step S411: Identify the bottom surface of the battery waiting to be measured in the detected image.

[0133] Step S412: Determine the distance between the bottom surface and the battery cell in the battery waiting to be measured.

[0134] Step S413: The deformation amount of the battery waiting for measurement is determined based on the distance.

[0135] During battery use, the bottom of the battery is easily deformed by impact, so attention must be paid to the bottom of the battery when detecting. Here, the bottom of the battery to be measured has structural adhesive for connecting the battery cell to the casing, so the bottom of the battery to be measured can be identified by the adhesive application area of ​​the battery to be measured.

[0136] When a battery waiting to be measured is deformed due to a collision or impact and pits appear in the battery cells, the distance between the battery cell and the bottom surface increases during deformation, and the amount of deformation of the battery waiting to be measured can be determined based on the distance between the bottom surface and the battery cell.

[0137] The distance between the bottom surface and the battery cell can be automatically determined by the detected image, for example, by first determining the outline of the bottom surface of the battery to be measured, then determining the outline of the battery cell, and then measuring the distance between the bottom surface of the battery to be measured and the battery cell. The distance between the bottom surface and the battery cell in the undeformed state can be directly input to the controller 450, and the deformation amount of the battery to be measured can be obtained based on the difference between the two distances.

[0138] In the embodiment of the present application, when the inside of the battery 500 to be measured is deformed, the distance between the bottom surface and the battery cells in the battery to be measured increases, and the amount of deformation of the battery to be measured can be determined based on the distance between the bottom surface and the battery cells in the battery to be measured.

[0139] According to some embodiments of the present application, and referring to FIG. 9, the controller is further configured as follows: Step S71: In response to the deformation amount being greater than a preset value, the battery to be measured is determined to be unacceptable.

[0140] In the embodiment of the present application, if the deformation amount is greater than a preset value, it is explained that the deformation of the battery 500 waiting to be measured is too large, which will affect the stability of the battery 500 waiting to be measured, and the battery 500 waiting to be measured is determined to be unqualified.

[0141] According to some embodiments of the present application, and referring to FIG. 9, the controller is further configured as follows: Step S72: In response to the amount of deformation being equal to or less than the preset value, the battery to be measured is determined to be acceptable.

[0142] In the embodiment of the present application, the controller 450 can control the complete detection of the battery waiting to be measured 500, and can also detect a specific abnormal point according to instructions, where the location of the abnormal point can be directly input to the controller 450.

[0143] In some embodiments of the present application, the time to detect the entire battery waiting for measurement 500 is not less than 100 seconds and not more than 150 seconds, and the time to detect one abnormal point is not less than 20 milliseconds and not more than 50 milliseconds.

[0144] According to some embodiments of the present application, the preset value is equal to or greater than 1 millimeter (mm) and equal to or less than 3 millimeters.

[0145] If the deformation of the battery is relatively small, the impact on battery reliability is relatively small; if the preset value is set too small, for example, less than 1 mm, too many batteries will be rejected, which may affect battery production; if the preset value is set too large, for example, more than 3 mm, the deformation in the battery will be relatively large, which will affect battery reliability. If the preset value is set to be greater than 1 mm and less than 3 mm, battery production can be guaranteed to a certain extent while battery reliability can be improved.

[0146] An embodiment of the present application provides a battery production apparatus, which includes any one of the detection devices in the above embodiments.

[0147] The battery production equipment includes a detection device 400 that performs non-destructive detection on the batteries to be measured 500 during the production process of the batteries to be measured 500 and detects deformation of the batteries to be measured 500 in a timely manner, thereby eliminating unacceptable batteries to be measured 500 and improving the quality of the batteries to be measured 500 that are being discharged.

[0148] The detection device of the present application will be further described below in connection with an exemplary embodiment.

[0149] The detection device 400 includes a scanning frame 410, a radiation source 420, a detector 430, and a mounting stage 440. The radiation source 420 and the detector 430 are both connected to the scanning frame 410, and the detector 430 faces the radiation source 420's exit port. The mounting stage 440 is located between the radiation source 420 and the detector 430, and the radiation source 420 and the detector 430 are rotatable around the same rotation axis O. The direction of rotation of the radiation source 420 is the same as the direction of rotation of the detector 430. During rotation, the detector 430 and the radiation source 420's exit port remain facing each other, and the mounting stage 440 is located between the radiation source 420 and the detector 430. The mounting stage 440 is used to mount a battery 500 to be measured. The rotation angle α of the radiation source 420 satisfies α≧180°. The mounting stage 440 is movably positioned between the radiation source 420 and the detector 430, and the direction of movement of the mounting stage 440 is parallel to the direction in which the rotation axis O extends.

[0150] The scanning frame 410 includes a base 411, a scanning ring 412, and a support wheel 413. The base 411 has a mounting groove 4111. At least a portion of the scanning ring 412 is positioned in the mounting groove 4111. The support wheel 413 is positioned in the mounting groove 4111 and connected to the base 411. The outer ring of the scanning ring 412 abuts against the support wheel 413. The scanning ring 412 is rotatable around a rotation axis O. A radiation source 420 and a detector 430 are both connected to the scanning ring 412, and the radiation source 420 and the detector 430 are positioned at opposite ends of one diameter of the scanning ring 412.

[0151] In the embodiment of the present application, the source 420 may be an electron linear accelerator, for example, a 9 MeV compact lightweight electron linear accelerator is employed, and the detector 430 may be a linear array detector.

[0152] During detection, the battery to be measured 500 is placed on the mounting stage 440 and scanned stepwise from one edge of the battery to be measured 500. The scanning ring 412 rotates the electron linear accelerator and linear array detector to perform a rotational scan, and the battery to be measured 500 moves stepwise forward according to a set detection procedure until the entire battery to be measured 500 is scanned. Then, a three-dimensional reconstruction is performed on the completed test picture, and slice processing is performed at a certain distance to detect the deformation amount at the bottom of the internal battery cell of the battery to be measured 500. Alternatively, a specific position, for example, the deformation position at the bottom of the housing of the battery to be measured 500 may be detected, and the battery to be measured 500 may be moved to the detection position and scanned, with the X-ray aligned with the deformation position at the bottom of the housing of the battery to be measured 500.

[0153] Finally, it should be noted that the above examples are merely for the purpose of illustrating the technical solutions of the present application and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art may still modify the technical solutions described in the above examples or make equivalent substitutions for some or all of the technical features therein. However, it should be understood that such modifications or substitutions do not deviate from the essence of the relevant technical solutions from the scope of the technical solutions of the examples of the present application, and all such modifications or substitutions should be included within the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the examples can be combined in any manner. The present application is not limited to the specific examples disclosed herein, but includes all technical solutions included within the scope of the claims.

Claims

1. A detection device for detecting deformation of a battery, comprising: a scanning frame (410); a radiation source (420) connected to the scanning frame (410); a detector (430) connected to the scanning frame (410) and facing the exit of the radiation source (420); a mounting stage (440) positioned between the radiation source (420) and the detector (430) for placing a battery (500) to be measured; Here, the radiation source (420) and the detector (430) are rotatable around the same rotation axis, the rotation direction of the radiation source (420) is the same as the rotation direction of the detector (430), and when rotating, the detector (430) and the radiation source (420) maintain a facing relationship with each other, and the mounting stage (440) is positioned between the radiation source (420) and the detector (430).

2. The scanning frame (410) a base (411) having a mounting groove (4111); a scan ring (412) positioned at least partially within the mounting groove (4111) and rotatable about the rotation axis; 2. The detection device of claim 1, wherein the radiation source (420) and the detector (430) are both connected to the scan ring (412), and the radiation source (420) and the detector (430) are located at opposite ends of one diameter of the scan ring (412).

3. The scanning frame (410) 3. The detection device of claim 2, further comprising a support ring (413) located in the mounting groove (4111) and connected to the base (411), wherein an outer ring of the scanning ring (412) abuts against the support ring (413).

4. 4. The detection device according to claim 1, wherein the rotation angle α of the radiation source (420) satisfies α≧180°.

5. 5. The detection device according to claim 1, wherein the mounting stage is movably positioned between the radiation source and the detector, and the direction of movement of the mounting stage is parallel to the direction in which the rotation axis extends.

6. The detection device includes: a controller, wherein the 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 is configured as follows: controlling the source and the detector to rotate about the axis of rotation; controlling the radiation source so that, as the radiation source rotates, the radiation is emitted and projected onto the detector through the measurement-ready cell located on the mounting stage; acquiring a detected image of the battery to be measured based on the radiation received by the detector; The detection device according to claim 1 , wherein deformation information of the battery to be measured is determined based on the detected image.

7. When the scanning frame includes a base and a scan ring, controlling the source and the detector to rotate about the axis of rotation includes configuring the controller to: The detection apparatus of claim 6 , wherein the scan ring is controlled to rotate about the axis of rotation.

8. The battery to be measured includes a bottom surface, the bottom surface having an adhesive application area, and the controller is further configured as follows:

8. The detection device according to claim 6, wherein the bottom surface of the battery to be measured is controlled to be bonded to the mounting surface of the mounting stage.

9. When the mounting stage is movable along the direction in which the rotation axis extends, the controller is further configured as follows:

9. The detection device according to claim 6, wherein the mounting stage is controlled to move along an extension direction of the rotation axis, and the mounting stage is positioned between the radiation source and the detector.

10. Obtaining a detected image of the battery-to-be-measured based on radiation received by the detector includes configuring the controller to: acquiring a plurality of original images based on the radiation received by the detector; performing three-dimensional reconstruction on the plurality of original images to obtain a plurality of cross-sectional detection images of the battery to be measured, the cross sections on which the plurality of cross-sectional detection images are located being parallel and being arranged at intervals in sequence along the extension direction of the rotation axis; The detection device according to claim 6 , wherein a detected image of the battery to be measured is determined based on the plurality of cross-sectional detection images.

11. Determining the detection image of the battery to be measured based on the plurality of cross-sectional detection images includes configuring the controller as follows: performing blurring processing on each of the plurality of cross-section detection images to obtain a plurality of first images; performing a convolution process on each of the first images to obtain a plurality of second images; The detection device according to claim 10 , further comprising: performing enhancement processing on each of the second images among the plurality of second images to obtain a detected image of the battery waiting to be measured.

12. 12. The detection device according to claim 10, wherein a distance between any two adjacent cross-section detection images among the plurality of cross-section detection images is equal to or greater than 0.05 mm and equal to or less than 0.5 mm.

13. Determining deformation information of the to-be-measured battery based on the detected image includes further configuring the controller as follows: determining the deformation amount of the battery waiting for measurement based on the detected image; The detection device according to claim 6 , wherein deformation information of the battery to be measured is determined based on the amount of deformation.

14. Determining the deformation amount of the battery to be measured based on the detected image includes further configuring the controller as follows: Identifying the bottom surface of the battery waiting to be measured in the detected image; determining a distance between the bottom surface and a battery cell in the battery to be measured; The detection device according to claim 13 , wherein the amount of deformation of the battery waiting to be measured is determined based on the distance.

15. The controller is further configured as follows:

15. The detection device according to claim 13 or 14, wherein the detection device determines that the battery to be measured is unacceptable in response to the amount of deformation being greater than a preset value.

16. The detection device according to claim 15 , wherein the preset value is equal to or greater than 1 millimeter and equal to or less than 3 millimeters.

17. Battery production equipment comprising a detection device according to any one of claims 1 to 16.

Images