Testing apparatus and battery cell testing device

Abstract

Provided in the present application are a testing apparatus and a battery cell testing device. The testing apparatus comprises: a ray source and a ray detector, which are oppositely arranged; and a carrying mechanism, which is located between the ray source and the ray detector, wherein the carrying mechanism comprises a carrying body and a first shielding plate, the first shielding plate is configured to block at least some rays projected onto the first shielding plate from penetrating through, the carrying body is configured for the placement of an object to be tested, edges of a projection area of rays emitted by the ray source on the plane where the first shielding plate is located are located inside edges of the first shielding plate, and the first shielding plate is configured to match said object so that the rays emitted by the ray source are projected to the ray detector through at least one of the first shielding plate and said object.

Description

Testing devices and battery cell testing equipment

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 202321704191.0, filed on June 30, 2023, entitled “Detection Device and Battery Cell Detection Equipment,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a detection device and battery cell detection equipment. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] Battery safety has always been a concern. Beyond safety design, post-assembly safety testing is also essential. Before shipment, batteries can be inspected for differences in positive and negative electrode coverage, alignment of positive and negative electrodes, distance between adjacent electrodes, total number of electrode cells, and other necessary inspections. However, there is still room for improvement in battery cell testing technology.

[0006] Summary of the Invention

[0007] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a detection device and a battery cell detection device to reduce the amount of radiation projected onto the radiation detector, thereby extending the service life of the radiation detector.

[0008] An embodiment of the first aspect of the present application provides a detection device, which includes a radiation source and a radiation detector arranged relative to each other, and a supporting mechanism located between the radiation source and the radiation detector; wherein the supporting mechanism includes a supporting body and a first shielding plate, the first shielding plate is configured to block at least a portion of the radiation projected onto the first shielding plate from passing through, the supporting body is configured to place an object to be detected, the edge of the projection area of ​​the radiation emitted by the radiation source on the plane where the first shielding plate is located is located on the inner side of the edge of the first shielding plate, and the first shielding plate is configured to cooperate with the object to be detected so that the radiation emitted by the radiation source is projected onto the radiation detector through at least one of the first shielding plate and the object to be detected.

[0009] In the technical solution of the embodiment of the present application, the first shielding plate in the detection device blocks at least a portion of the radiation projected onto the first shielding plate from passing through, thereby reducing the amount of radiation emitted by the radiation source that is projected onto the radiation detector. By setting the edge of the projection area of ​​the radiation emitted by the radiation source on the plane where the first shielding plate is located inward of the edge of the first shielding plate, the first shielding plate cooperates with the object to be detected so that the radiation emitted by the radiation source passes through at least one of the first shielding plate and the object to be detected and is projected onto the radiation detector. This reduces the amount of radiation directly projected onto the radiation detector, forming an unexposed area, and thereby increases the service life of the radiation detector.

[0010] In some embodiments, a window is formed on the first shielding plate, and the window corresponds to the position of the object to be detected on the carrier body. By forming the window on the first shielding plate and aligning the window with the position of the object to be detected on the carrier body, the first shielding plate and the object to be detected cooperate to allow radiation emitted by the radiation source to pass through at least one of the first shielding plate and the object to be detected and project to the radiation detector. The formation of the window on the first shielding plate does not affect the amount of radiation that passes through the object to be detected, thereby not affecting the detection of the object to be detected.

[0011] In some embodiments, the surface of the carrier body facing the radiation source includes a receiving groove for receiving the object to be detected. Providing a receiving groove on the surface of the carrier body facing the radiation source for receiving the object to be detected facilitates secure placement of the object to be detected on the carrier body. Furthermore, this reduces the carrier body's blocking effect on radiation, improving the imaging quality of the object to be detected on the radiation detector.

[0012] In some embodiments, when a window is provided on the first shielding plate, the receiving groove and the window are positioned correspondingly, and both are of the same shape and size. This alignment of the receiving groove and the window does not affect the amount of radiation that passes through the object to be inspected, thereby preventing interference with detection of the object. Furthermore, by ensuring that both the receiving groove and the window are of the same shape and size, the amount of radiation that directly impacts the radiation detector, resulting in unexposed areas, can be reduced, thereby increasing the lifespan of the radiation detector.

[0013] In some embodiments, the first shielding plate is disposed on the surface of the carrier body, which can reduce the amount of radiation projected onto the radiation detector through the gap between the first shielding plate and the carrier body, thereby further extending the service life of the radiation detector.

[0014] In some embodiments, the first shielding plate is disposed on the surface of the carrier body facing the radiation source. This arrangement, in which the first shielding plate is supported by the carrier body, provides a relatively simple structural design and is easy to manufacture. When an object to be detected is placed on the surface of the carrier body facing the radiation source, the amount of radiation projected onto the radiation detector through the gap between the first shielding plate and the carrier body can be further reduced, thereby further extending the lifespan of the radiation detector.

[0015] In some embodiments, the supporting mechanism includes a plurality of supporting bodies, and further includes a second shielding plate disposed between two adjacent supporting bodies, wherein the orthographic projection of the second shielding plate on the plane where the surface of the supporting body facing the radiation source lies at least covers the gap between the two adjacent supporting bodies. By disposing the second shielding plate between the two adjacent supporting bodies, wherein the orthographic projection of the second shielding plate on the plane where the surface of the supporting body facing the radiation source lies at least covers the gap between the two adjacent supporting bodies, radiation projected onto the second shielding plate can be blocked to a certain extent from passing through the gap between the two adjacent supporting bodies and projecting onto the radiation detector, thereby further reducing the amount of radiation projected onto the surface of the radiation detector and thereby extending the service life of the radiation detector.

[0016] In some embodiments, the second shielding plate includes a first portion and a second portion. The first portion is disposed on the surface of the supporting body facing the radiation source, and the second portion is connected to the first portion. The orthographic projection of the second portion on the plane of the surface of the supporting body facing the radiation source at least covers the gap between two adjacent supporting bodies. Thus, the second shielding plate can prevent radiation projected onto the second shielding plate from passing through the gap between two adjacent supporting bodies and projecting onto the radiation detector. Furthermore, the second shielding plate has a simple structure and is easily fixed.

[0017] In some embodiments, the distance between the surface of the second portion facing the detector and the surface of the supporting body facing the radiation source is greater than or equal to the maximum thickness of the first shielding plate. By setting the distance between the surface of the second portion facing the detector and the surface of the supporting body facing the radiation source to be greater than or equal to the maximum thickness of the first shielding plate, the second portion of the second shielding plate is not blocked by the first shielding plate, and the orthographic projection of the second shielding plate on the plane containing the surface of the supporting body facing the radiation source can be ensured to completely cover the gap between two adjacent supporting bodies.

[0018] In some embodiments, the detection device further includes a control element and a position detection component. The position detection component is configured to detect position information of an object to be detected, and the control element is configured to turn the radiation source on or off based on the position information of the object to be detected. By turning the radiation source on or off based on the position information of the object to be detected by the control element, the on-off time of the radiation source can be controlled, thereby reducing the on-time of the radiation source, thereby reducing the duration of radiation exposure to the radiation detector, and thereby extending the service life of the radiation detector.

[0019] In some embodiments, the detection device further includes a drive mechanism configured to drive the movement of the carrier mechanism. The position detection assembly includes a magnetic scale and a magnetic scale reader. The magnetic scale is disposed on a side of the carrier body adjacent to the surface of the carrier body facing the radiation source along the direction of movement of the carrier mechanism. The magnetic scale reader obtains position information of the object to be detected by changes in the magnetic poles of the magnetic scale. The position detection assembly of this structural form has the advantages of simple structure and efficient detection.

[0020] An embodiment of the second aspect of the present application provides a battery cell detection device, which includes the detection device in the aforementioned embodiment, and the object to be detected is a battery cell.

[0021] 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

[0022] 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. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without paying creative work.

[0023] FIG1 is a schematic structural diagram of a detection device provided in some embodiments of the present application;

[0024] FIG2 is a schematic structural diagram of a supporting mechanism provided in some embodiments of the present application;

[0025] FIG3 is a left side view of a supporting mechanism provided in some embodiments of the present application;

[0026] FIG4 is an exploded schematic diagram of a supporting mechanism provided in some embodiments of the present application;

[0027] FIG5 is a left side view of FIG4;

[0028] FIG6 is a schematic structural diagram of another detection device provided in some embodiments of the present application;

[0029] FIG7 is a schematic structural diagram of a detection device provided in some other embodiments of the present application.

[0030] Explanation of the accompanying reference numerals: 100, detection device; 110, ray source; 120, ray detector; 130, carrying mechanism; 140, object to be detected; 150, control element; 160, position detection component; 170, ray; 131, carrying body; 132, first baffle; 1321, window; 133, second baffle; 1331, first part; 1332, second part; 161, magnetic scale; 162, magnetic scale reader. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0036] 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).

[0037] 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. They 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. Therefore, they should not be understood as limiting the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] Currently, conventional nondestructive testing equipment typically utilizes radiographic detector imaging systems, also known as X-ray imaging testing. During the testing process, a portion of the X-rays projected onto the object are absorbed and scattered by the object, while the remaining portion passes through the object and propagates in its original direction. Because different parts of the object vary in density and thickness, they absorb varying amounts of the incident X-rays. Consequently, image information of the object is transmitted to the X-ray detector in the form of varying X-ray intensities.

[0040] X-rays are high-energy radiation. X-ray sources, such as X-ray tubes, magnetrons, and klystrons, generate X-rays by accelerating electrons in an electric current and bombarding heavy metal targets at high speeds, emitting X-rays. The high-energy particles of X-rays have a strong penetrating effect on matter and can cause irreparable damage to X-ray detectors, significantly reducing their service life. Therefore, X-ray detectors must be protected when used in imaging systems.

[0041] Therefore, the present application proposes a detection device that uses a shielding plate to block at least a portion of the radiation projected onto the shielding plate, thereby reducing the amount of radiation projected onto the radiation detector and extending the service life of the radiation detector.

[0042] The detection device disclosed in the embodiment of the present application can be applicable to but not limited to battery cell detection, and can be applicable to but not limited to detection processes in the production process of battery cells. The service life of the detection device of the present application can be extended, thereby improving the detection efficiency of battery cell detection and further improving the production efficiency of battery cells.

[0043] Figure 1 is a structural schematic diagram of a detection device provided by some embodiments of the present application. As shown in Figure 1, the detection device 100 includes a radiation source 110 and a radiation detector 120 arranged opposite to each other, and a supporting mechanism 130 located between the radiation source 110 and the radiation detector 120; wherein, the supporting mechanism 130 includes a supporting body 131 and a first shielding plate 132, the first shielding plate 132 is configured to block at least a portion of the radiation 170 projected onto the first shielding plate 132 from passing through, the supporting body 131 is configured to place an object to be detected 140, the edge of the projection area of ​​the radiation 170 emitted by the radiation source 110 on the plane where the first shielding plate 132 is located is located on the inner side of the edge of the first shielding plate 132, and the first shielding plate 132 is configured to cooperate with the object to be detected 140 so that the radiation 170 emitted by the radiation source 110 is projected to the radiation detector 120 through at least one of the first shielding plate 132 and the object to be detected 140.

[0044] In some embodiments of the present application, the radiation source 110 refers to a device capable of emitting radiation 170, such as an X-ray source. The radiation detector 120 may be a flat panel detector or a TDI (Time Delay Integration) detector, wherein the flat panel detector is an array detector that can directly image the irradiated X-rays. The TDI detector is a linear image sensor that achieves high-speed, high-resolution image acquisition by aligning the pixel rows of the image sensor perpendicular to the direction of movement of the object to be detected. The radiation detector 120 can convert the received radiation energy into a recordable electrical signal, and by measuring the amount of radiation received by the radiation detector 120, an electrical signal proportional to the amount of radiation is generated, thereby forming a corresponding image. Exemplarily, the radiation detector 120 may include three parts: a radiation conversion module, a photoelectric conversion module, and a signal readout and transmission module. During the process of the detection device 100 detecting the object to be detected 140, the object to be detected 140 is placed in the radiation radiation area of ​​the radiation source 110, and the radiation 170 emitted by the radiation source 110 is emitted from the radiation irradiation window. The emitted radiation 170 passes through the object to be detected 140 and is projected onto the radiation detector 120. The radiation detector 120 receives the radiation that passes through the object to be detected 140 and images the object to be detected 140.

[0045] In some embodiments of the present application, the supporting mechanism 130 includes a supporting body 131 and a first shielding plate 132. The supporting body 131 is used to place the object to be detected 140. The first shielding plate 132 can be set on the surface of the supporting body 131 facing the radiation source 110. The first shielding plate 132 can also be set on the surface of the supporting body 131 facing the radiation detector 120.

[0046] Figure 2 is a schematic structural diagram of a supporting mechanism 130 provided in some embodiments of the present application, and Figure 3 is a left side view of a supporting mechanism 130 provided in some embodiments of the present application. In some embodiments, as shown in Figures 2 and 3, the first shielding plate 132 can be arranged to fit the surface of the supporting body 131. Figure 4 is a schematic structural diagram of another supporting mechanism provided in some embodiments of the present application, and Figure 5 is a left side view of Figure 4. In other embodiments, as shown in Figures 4 and 5, the first shielding plate 132 can be spaced apart from the surface of the supporting body 131.

[0047] For example, the material of the carrier body 131 may include carbon fiber. The carrier body 131 may be a carbon fiber sheet formed by impregnating and curing carbon fibers arranged in the same direction with resin. The carbon fiber sheet has advantages such as low density, good radiographic transparency, light weight, good flexibility, good durability, and corrosion resistance. The good radiographic transparency can reduce the impact on the imaging effect of the object to be inspected 140.

[0048] In some embodiments of the present application, since the first shielding plate 132 is used to block at least a portion of the rays 170 projected onto the first shielding plate 132 from passing through, the radiation transmittance requirements of the first shielding plate 132 are relatively low. The material of the first shielding plate 132 can be lead. The first shielding plate 132 made of lead can block the radiation 170 projected onto the first shielding plate 132 from passing through to a certain extent.

[0049] In some embodiments of the present application, as shown in FIG1 , the radiation 170 emitted by the radiation source 110 is projected onto the first shielding plate 132. The edge of the projection area of ​​the radiation 170 on the plane where the first shielding plate 132 is located is located inside the edge of the first shielding plate 132. This includes two situations: First, the edge of the projection area of ​​the radiation 170 emitted by the radiation source 110 on the plane where the first shielding plate 132 is located does not overlap with the edge of the first shielding plate 132. This spacing prevents the radiation 170 emitted by the radiation source 110 from passing outside the edge of the first shielding plate 132 and projecting onto the radiation detector 120, thereby forming an unexposed area and affecting the service life of the radiation detector 120. Second, the edge of the projection area of ​​the radiation 170 emitted by the radiation source 110 on the plane where the first shielding plate 132 is located may overlap with the edge of the first shielding plate 132. In this case, the amount of radiation 170 projected onto the radiation detector 120 from outside the edge of the first shielding plate 132 is less, thereby reducing the impact on the service life of the radiation detector 120.

[0050] In some embodiments of the present application, the cooperation between the first shielding plate 132 and the object 140 may mean that the projection of the object 140 on the plane of the first shielding plate 132 and the first shielding plate 132 together form a substantially enclosed area, allowing the radiation 170 emitted by the radiation source 110 to pass through at least one of the first shielding plate 132 and the object 140 to be projected onto the radiation detector 120. In one embodiment, the radiation 170 emitted by the radiation source 110 may first be projected onto the first shielding plate 132, then pass through the first shielding plate 132 and then be projected onto the object 140, and then pass through the object 140 to be projected onto the radiation detector 120, thereby obtaining an image of the object 140. In another embodiment, the radiation 170 emitted by the radiation source 110 may first be projected onto the object 140, then pass through the object 140 and then be projected onto the first shielding plate 132, and then pass through the first shielding plate 132 and then be projected onto the radiation detector 120, thereby obtaining an image of the object 140. In the above two cases, since the object to be detected 140 is placed in the radiation area of ​​the radiation source 110, and the edge of the projection area of ​​the radiation 170 emitted by the radiation source 110 on the plane where the first shielding plate 132 is located is located on the inner side of the edge of the first shielding plate 132, the radiation is reduced from being directly projected onto the unexposed area formed by the radiation detector 120, affecting the service life of the radiation detector 120.

[0051] In another embodiment, a portion of the rays 170 emitted by the ray source 110 can be projected onto the first baffle plate 132, and then directly projected onto the ray detector 120 after passing through the first baffle plate 132. Another portion of the rays 170 emitted by the ray source 110 can be projected onto the object to be detected 140, and then directly projected onto the ray detector 120 after passing through the object to be detected 140. In this case, by setting the first baffle plate 132 to cooperate with the object to be detected 140, the gap between the first baffle plate 132 and the object to be detected 140 can be reduced, thereby reducing the unexposed area formed by the direct projection of the rays onto the ray detector 120, which affects the service life of the ray detector 120.

[0052] In the embodiment of the present application, the first shielding plate 132 in the detection device 100 blocks at least a portion of the radiation 170 projected onto the first shielding plate 132 from passing through, thereby reducing the amount of radiation 170 emitted by the radiation source 110 that is projected onto the radiation detector 120. By arranging the edge of the projection area of ​​the radiation 170 emitted by the radiation source 110 on the plane where the first shielding plate 132 is located inward of the edge of the first shielding plate 132, the first shielding plate 132 cooperates with the object to be detected 140 to allow the radiation 170 emitted by the radiation source 110 to pass through at least one of the first shielding plate 132 and the object to be detected 140 and be projected onto the radiation detector 120. This reduces the amount of radiation 170 directly projected onto the radiation detector 120, thereby reducing the formation of an airburst area, thereby increasing the service life of the radiation detector 120.

[0053] According to some embodiments of the present application, a window 1321 is defined on the first shielding plate 132 , and the window 1321 corresponds to the position of the object to be detected 140 on the supporting body 131 .

[0054] In some embodiments of the present application, in combination with Figures 2 and 4, a window 1321 is provided on the first baffle plate 132, and the window 1321 corresponds to the position of the object to be detected 140 on the carrier body 131, so that the rays 170 emitted by the ray source 110 can be projected onto the ray detector 120 through the window 1321 and the object to be detected 140 provided on the first baffle plate 132 to obtain an image of the object to be detected 140, so that the remaining positions on the first baffle plate 132 except the window 1321 can block the rays 170 projected onto the first baffle plate 132 from passing through.

[0055] In the examples shown in Figures 2 and 4 , a window 1321 is provided in the middle of the first shielding plate 132. In some embodiments, the window 1321 may also be a gap provided along a side edge of the first shielding plate 132. In this case, during detection, the position of the object 140 to be detected corresponds to the position of the window 1321, which is equivalent to filling the gap. Therefore, the edge of the first shielding plate 132 in the embodiment of the present application is still the edge of the first shielding plate 132 after the side gap is filled.

[0056] In an embodiment of the present application, a window 1321 is provided on the first baffle plate 132, and the window 1321 is aligned with the position of the object to be detected 140 on the carrier body 131, so that the first baffle plate 132 cooperates with the object to be detected 140 so that the rays 170 emitted by the ray source 110 are projected onto the ray detector 120 through the first baffle plate 132 and at least one of the objects to be detected 140, and the window 1321 is provided on the first baffle plate 132 without affecting the amount of rays passing through the object to be detected 140, thereby not affecting the detection of the object to be detected 140.

[0057] According to some embodiments of the present application, the surface of the carrying body 131 facing the radiation source 110 includes a receiving groove, and the receiving groove is used to receive the object 140 to be detected.

[0058] In some embodiments of the present application, when the radiation source 110 is located above the supporting mechanism 130 and the radiation detector 120 is located below the supporting mechanism 130, the side of the supporting body 131 facing the radiation source 110 above the supporting mechanism 130 includes a receiving groove. In actual use, when the radiation detector 120 is located above the supporting mechanism 130 and the radiation source 110 is located below the supporting mechanism 130, the side of the supporting body 131 facing the radiation detector 120 above the supporting mechanism 130 includes a receiving groove.

[0059] In the embodiment of the present application, a receiving groove is provided on the surface of the carrier body 131 facing the radiation source 110 to accommodate the object to be detected 140, thereby facilitating the secure placement of the object to be detected 140 on the carrier body 131. Furthermore, the blocking effect of the carrier body 131 on the radiation 170 can be reduced, thereby improving the imaging effect of the object to be detected 140 on the radiation detector 120.

[0060] According to some embodiments of the present application, when a window 1321 is provided on the first shielding plate 132 , the accommodating groove corresponds to the position of the window 1321 , and the accommodating groove and the window 1321 have the same shape and size.

[0061] In the embodiment of the present application, by setting the position of the accommodating groove and the window 1321 to correspond to each other, the amount of radiation passing through the object to be detected 140 will not be affected, and thus the detection of the object to be detected 140 will not be affected; at the same time, by setting the shape and size of the accommodating groove and the window 1321 to be the same, the radiation 170 can be reduced from being directly projected onto the radiation detector 120 to form an airburst area, thereby increasing the service life of the radiation detector 120.

[0062] According to some embodiments of the present application, the first shielding plate 132 is disposed in contact with the surface of the carrying body 131 .

[0063] In an embodiment of the present application, as shown in Figures 2 and 3, the first baffle plate 132 is attached to the surface of the carrier body 131, that is, there is no gap between the first baffle plate 132 and the carrier body 131, which can reduce the amount of radiation projected onto the radiation detector 120 through the gap between the first baffle plate 132 and the carrier body 131, thereby further extending the service life of the radiation detector 120.

[0064] According to some embodiments of the present application, the first shielding plate 132 is disposed on a surface of the supporting body 131 facing the radiation source 110 .

[0065] In this embodiment of the present application, the first shielding plate 132 is disposed on the surface of the carrier body 131 facing the radiation source 110. In other words, the carrier body 131 supports the first shielding plate 132. This structural design is relatively simple and easy to manufacture. When the object 140 to be detected is placed on the surface of the carrier body 131 facing the radiation source 110, the amount of radiation projected onto the radiation detector 120 through the gap between the first shielding plate 132 and the carrier body 131 can be further reduced, thereby further extending the service life of the radiation detector 120.

[0066] Figure 6 is a structural schematic diagram of another detection device provided in some embodiments of the present application. As shown in Figure 6, the supporting mechanism 130 includes a plurality of supporting bodies 131. The supporting mechanism 130 also includes a second shielding plate 133 arranged between two adjacent supporting bodies 131. The orthographic projection of the second shielding plate 133 on the plane where the surface of the supporting body 131 facing the radiation source 110 is located at least covers the gap between the two adjacent supporting bodies 131.

[0067] In this embodiment of the present application, when the radiation source 110 is located above the carrier 130 and the radiation detector 120 is located below the carrier 130, the second shielding plate 133 is disposed on the side of the carrier 130 facing the radiation source 110 above it. When the radiation detector 120 is located above the carrier 130 and the radiation source 110 is located below the carrier 130, the second shielding plate 133 is disposed on the side of the carrier 130 facing the radiation source 110 below it. Furthermore, a portion of the second shielding plate 133 can be disposed on the surface of the carrier body 131 facing the radiation source 110.

[0068] In an embodiment of the present application, a second baffle plate 133 is provided between two adjacent supporting bodies 131, and the orthographic projection of the second baffle plate 133 on the plane where the surface of the supporting body 131 facing the radiation source 110 is located at least covers the gap between the two adjacent supporting bodies 131. This can, to a certain extent, block the rays 170 projected onto the second baffle plate 133 from passing through the gap between the two adjacent supporting bodies 131 and projecting onto the radiation detector 120, thereby further reducing the amount of rays projected onto the surface of the radiation detector 120, and thereby extending the service life of the radiation detector 120.

[0069] According to some embodiments of the present application, as shown in Figure 6, the second baffle 133 includes a first part 1331 and a second part 1332, the first part 1331 is arranged on the surface of the carrier body 131 facing the radiation source 110, and the second part 1332 is connected to the first part 1331, and the orthographic projection of the second part 1332 on the plane where the surface of the carrier body 131 facing the radiation source 110 is located at least covers the gap between two adjacent carrier bodies 131.

[0070] In the embodiment of the present application, for example, the shape of the first part 1331 and the second part 1332 can both be rectangular. The second part 1332 can be fixedly connected to the first part 1331 or movably connected. The first part 1331 is arranged on the surface of the carrier body 131 facing the radiation source 110, and the orthographic projection of the second part 1332 on the plane where the surface of the carrier body 131 facing the radiation source 110 is located at least covers the gap between two adjacent carrier bodies 131, so that the second shielding plate 133 can block the rays 170 projected onto the second shielding plate 133 from passing through the gap between the two adjacent carrier bodies 131 and projecting onto the radiation detector 120. At the same time, the structure of the second shielding plate 133 is simple and easy to fix.

[0071] According to some embodiments of the present application, the distance between the surface of the second portion 1332 facing the detector and the surface of the carrying body 131 facing the radiation source 110 is greater than or equal to the maximum thickness of the first shielding plate 132 .

[0072] In an embodiment of the present application, by setting the distance between the surface of the second part 1332 facing the detector and the surface of the supporting body 131 facing the radiation source 110 to be greater than or equal to the maximum thickness of the first baffle plate 132, the second part 1332 of the second baffle plate 133 will not be blocked by the first baffle plate 132, and it can be ensured that the orthographic projection of the second baffle plate 133 on the plane where the surface of the supporting body 131 facing the radiation source 110 is located completely covers the gap between the two adjacent supporting bodies 131.

[0073] Figure 7 is a structural schematic diagram of a detection device provided in other embodiments of the present application. As shown in Figure 7, the detection device 100 also includes a control element 150 and a position detection component 160. The position detection component 160 is configured to detect the position information of the object to be detected 140, and the control element 150 is configured to turn on or off the radiation source 110 according to the position information of the object to be detected 140.

[0074] In some embodiments of the present application, the position detection component 160 is used to detect the position of the object to be detected 140 when the object to be detected 140 moves along with the supporting mechanism 130 .

[0075] In some embodiments of the present application, the control element 150 can be connected to the radiation source 110 and the position detection component 160 at the same time. The control element 150 turns on or off the radiation source 110 according to the position information of the object to be detected 140 detected by the position detection component 160. When the position information of the object to be detected 140 detected by the position detection component 160 is that the distance between the object to be detected 140 and the radiation detector 120 is less than or equal to a preset threshold, the control element 150 turns on the radiation source 110; when the position information of the object to be detected 140 detected by the position detection component 160 is that the distance between the object to be detected 140 and the radiation detector 120 is greater than the preset threshold, the control element 150 turns off the radiation source 110.

[0076] In an embodiment of the present application, by turning on or off the radiation source 110 according to the position information of the object to be detected 140 through the control element 150, the switching time of the radiation source 110 can be controlled, and the on time of the radiation source 110 can be reduced, thereby reducing the length of time that the radiation detector 120 is irradiated by the radiation 170, and further extending the service life of the radiation detector 120.

[0077] According to some embodiments of the present application, the detection device 100 also includes a driving mechanism, which is configured to drive the carrying mechanism 130 to move. The position detection component 160 includes a magnetic scale 161 and a magnetic scale reader 162. The magnetic scale 161 is arranged on the side of the carrying body 131 along the movement direction Y of the carrying mechanism 130 and is adjacent to the surface of the carrying body 131 facing the radiation source 110. The magnetic scale reader 162 obtains the position information of the object to be detected 140 through the change of the magnetic pole of the magnetic scale 161.

[0078] In some embodiments of the present application, the driving mechanism is used to drive the supporting mechanism 130 to move along the movement direction Y, so that the object to be inspected 140 can move along the movement direction Y to the inspection station.

[0079] In some embodiments of the present application, the position detection component 160 includes a magnetic scale 161 and a magnetic scale reader 162. The magnetic scale 161 is arranged on the side of the carrier body 131 along the movement direction Y of the carrier mechanism 130 and is adjacent to the surface of the carrier body 131 facing the radiation source 110. When the driving mechanism drives the carrier mechanism 130 to move along the movement direction Y, the magnetic scale reader 162 can read the changes in the magnetic poles of the magnetic scale 161. The magnetic scale reader 162 can obtain the position information of the carrier body 131 through the changes in the magnetic poles of the magnetic scale 161, and the position information of the object to be detected 140 can be obtained through the position information of the carrier body 131.

[0080] In the embodiment of the present application, a magnetic scale 161 is disposed on the side of the carrier body 131 adjacent to the surface of the carrier body 131 facing the radiation source 110 along the direction of motion Y of the carrier mechanism 130, and a magnetic scale reader 162 obtains position information of the object to be detected 140 by observing changes in the magnetic poles of the magnetic scale 161. This structural form of the position detection assembly 160 has the advantages of simple structure and efficient detection.

[0081] An embodiment of the present application provides a battery cell detection device, which includes the detection device 100 in the aforementioned embodiment, and the object 140 to be detected is a battery cell.

[0082] In the embodiments of the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc. The battery cell may be in the shape of a rectangular parallelepiped or a cube, etc. The battery cell includes a casing, an electrode assembly and an electrolyte, and the casing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0083] In the embodiment of the present application, the detection device 100 in the aforementioned embodiment is used to detect battery cells, which can improve the detection efficiency of battery cells and further improve the production efficiency of battery cells.

[0084] The technical solution of the present application will be further described below through a specific embodiment. As shown in Figures 1 to 7, the detection device 100 includes a radiation source 110 and a radiation detector 120 that are arranged opposite to each other, and a supporting mechanism 130 located between the radiation source 110 and the radiation detector 120. The supporting mechanism 130 includes a plurality of supporting bodies 131, a first shielding plate 132, and a second shielding plate 133. The supporting bodies 131 are configured to place an object 140 to be detected. The first shielding plate 132 is configured to block at least a portion of the radiation 170 projected onto the first shielding plate 132 from passing through. The second shielding plate 133 is disposed between two adjacent supporting bodies 131. The orthographic projection of the second shielding plate 133 on the plane where the surface of the supporting body 131 facing the radiation source 110 is located at least covers the gap between the two adjacent supporting bodies 131.

[0085] The edge of the projection area of ​​the ray 170 emitted by the ray source 110 on the plane where the first baffle plate 132 is located is located on the inner side of the edge of the first baffle plate 132, and the first baffle plate 132 is configured to cooperate with the object to be detected 140 so that the ray 170 emitted by the ray source 110 is projected to the ray detector 120 through at least one of the first baffle plate 132 and the object to be detected 140.

[0086] A window 1321 is provided on the first baffle plate 132, and the surface of the carrier body 131 facing the radiation source 110 includes a accommodating groove, which corresponds to the position of the window 1321, and the accommodating groove and the window 1321 have the same shape and size. The window 1321 corresponds to the position of the object to be detected 140 on the carrier body 131, and the accommodating groove is used to accommodate the object to be detected 140.

[0087] The second baffle 133 includes a first part 1331 and a second part 1332. The first part 1331 is arranged on the surface of the supporting body 131 facing the radiation source 110, and the second part 1332 is connected to the first part 1331. The orthographic projection of the second part 1332 on the plane where the surface of the supporting body 131 facing the radiation source 110 is located at least covers the gap between two adjacent supporting bodies 131. The distance between the surface of the second part 1332 facing the detector and the surface of the supporting body 131 facing the radiation source 110 is greater than or equal to the maximum thickness of the first baffle 132.

[0088] The detection device 100 also includes a driving mechanism, a control element 150 and a position detection component 160. The driving mechanism is configured to drive the supporting mechanism 130 to move. The position detection component 160 includes a magnetic scale 161 and a magnetic scale reader 162. The magnetic scale 161 is arranged on the side of the supporting body 131 along the movement direction Y of the supporting mechanism 130 and is adjacent to the surface of the supporting body 131 facing the radiation source 110. The magnetic scale reader 162 obtains the position information of the object to be detected 140 through the change of the magnetic pole of the magnetic scale 161. The control element 150 turns on or off the radiation source 110 according to the position information of the object to be detected 140.

[0089] In some embodiments of the present application, the radiation detector 120 is exemplarily a TDI detector. During the detection process of the detection device detecting an object 140, a drive mechanism drives the movement of multiple carrier bodies 131, on which the object 140 is placed. Based on the position information of the object 140 obtained by the magnetic scale reader 162 through the changes in the magnetic poles of the magnetic scale 161, the control element 150 activates the radiation source 110 when the object 140 reaches the detection area. Radiation 170 emitted by the radiation source 110 passes through at least one of the first shielding plate 132 and the object 140 and is projected onto the TDI detector. The object 140 is imaged by the TDI detector. During the detection process, the first shielding plate 132 blocks at least a portion of the radiation 170 projected onto the first shielding plate 132, while the second shielding plate 133 blocks the radiation 170 from projecting into the gap between two adjacent carrier bodies 131. When the object to be detected 140 leaves the detection area, the control element 150 controls the radiation source 110 to be turned off.

[0090] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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, comprising: A radiation source (110) and a radiation detector (120) arranged opposite to each other, and a bearing mechanism located between the radiation source (110) and the radiation detector (120); The bearing mechanism (130) comprises a bearing body (131) and a first shielding plate (132), wherein the first shielding plate (132) is configured to block at least a portion of the rays (170) projected onto the first shielding plate (132) from passing through. The supporting body (131) is configured to place an object to be detected (140), and the edge of a projection area of ​​the ray (170) emitted by the ray source (110) on the plane where the first shielding plate (132) is located is located on the inner side of the edge of the first shielding plate (132), and the first shielding plate (132) is configured to cooperate with the object to be detected (140) so that the ray (170) emitted by the ray source (110) is projected to the ray detector (120) through at least one of the first shielding plate (132) and the object to be detected (140).

2. The detection device according to claim 1, wherein: The first shielding plate (132) is provided with a window (1321), and the window (1321) corresponds to the position of the object to be detected (140) on the carrying body (131).

3. The detection device according to claim 1 or 2, wherein: The surface of the carrying body (131) facing the radiation source (110) comprises a receiving groove, and the receiving groove is used to receive the object to be detected (140).

4. The detection device according to claim 3, wherein: When a window (1321) is provided on the first shielding plate (132), the accommodating groove corresponds to the position of the window (1321), and the accommodating groove and the window (1321) are of the same shape and size.

5. The detection device according to any one of claims 1 to 4, wherein: The first shielding plate (132) is arranged to fit the surface of the supporting body (131).

6. The detection device according to claim 5, wherein: The first shielding plate (132) is arranged on a surface of the supporting body (131) facing the radiation source (110).

7. The detection device according to any one of claims 1 to 6, wherein: The carrying mechanism (130) comprises a plurality of carrying bodies (131), and the carrying mechanism (130) further comprises a second shielding plate (133) arranged between two adjacent carrying bodies (131), wherein the orthographic projection of the second shielding plate (133) on the plane where the surface of the carrying body (131) facing the radiation source (110) is located at least covers the gap between the two adjacent carrying bodies (131).

8. The detection device according to claim 7, wherein: The second shielding plate (133) comprises a first part (1331) and a second part (1332), wherein the first part (1331) is arranged on the surface of the supporting body (131) facing the radiation source (110), and the second part (1332) is connected to the first part (1331), and the orthographic projection of the second part (1332) on the plane where the surface of the supporting body (131) facing the radiation source (110) is located at least covers the gap between two adjacent supporting bodies (131).

9. The detection device according to claim 8, wherein: The distance between the surface of the second part (1332) facing the detector and the surface of the supporting body (131) facing the ray source (110) is greater than or equal to the maximum thickness of the first shielding plate (132).

10. The detection device according to any one of claims 1 to 9, wherein: The detection device further comprises a control element (150) and a position detection component (160), wherein the position detection component (160) is configured to detect position information of the object to be detected (140), and the control element (150) is configured to turn on or off the radiation source (110) according to the position information of the object to be detected (140).

11. The detection device according to claim 10, wherein: The detection device also includes a driving mechanism, which is configured to drive the supporting mechanism (130) to move. The position detection component (160) includes a magnetic scale (161) and a magnetic scale reader (162). The magnetic scale (161) is arranged on a side of the supporting body (131) adjacent to a surface of the supporting body (131) facing the radiation source (110) along a movement direction of the supporting mechanism (130). The magnetic scale reader (162) obtains position information of the object (140) to be detected through changes in the magnetic poles of the magnetic scale (161).

12. A battery cell detection device, comprising the detection apparatus (100) according to any one of claims 1 to 11, wherein the object to be detected (140) is a battery cell.

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