Auxiliary battery scanning device for CT (Computed Tomography)
By using a spherical auxiliary device with alternating layers of metal and resin spheres in CT scans, the problem of image clarity due to the large aspect ratio of square batteries was solved, achieving uniform X-ray penetration in all directions and clear CT images.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-04-07
AI Technical Summary
In CT scans of square batteries, when the width-to-thickness ratio is large, it is difficult to maintain image clarity in both the width and thickness directions simultaneously. Existing technologies cannot achieve stable and clear CT images without changing the voltage and current.
A spherical body consisting of alternating layers of metal and resin spheres is used as a battery-assisted scanning device. By homogenizing the penetration of X-rays, clear imaging is ensured in all directions, with the central image, including the intermediate electrode plate, always remaining clear.
It achieves excellent image clarity in all directions of CT scans regardless of the battery width-to-thickness ratio, avoiding image blurring caused by voltage and current changes, and ensuring the stability and clarity of CT images.
Smart Images
Figure CN224095738U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the battery auxiliary scanning device for CT (X -ray inspection device). Specifically, it relates to the battery auxiliary scanning device for CT of square battery. BACKGROUND
[0002] With the rapid development of the manufacture and production of battery (also including cell), it is required that the battery manufacturing process becomes efficient and the management becomes accurate.
[0003] For example, generally speaking, in the manufacture of battery, after all processes are completed and assembled into battery, sampling inspection (spot check) using CT scanning is carried out to confirm the defects of each component inside the battery, the presence or absence of damage and the accuracy of assembly and the like. It should be noted that CT scanning is a commonly used non-destructive testing technology, and its main mechanism is that according to the different absorption and transmittance of X-rays in the photographed specific surface to the different materials and densities of the internal part of the measured object, the data of the received X-ray intensity can be converted after penetrating the measured object, and the image of the internal structure can be obtained.
[0004] During CT scanning, the battery is rotated while being photographed. In order to check the accuracy, it is required that the CT image is clear. However, especially in the case of square battery whose width-thickness ratio is not close to 1, problems are easily caused, and the CT image cannot be stably kept clear. Here, the so-called width-thickness ratio refers to the ratio of the width (i.e. the width) of the square battery to the thickness. Figure 1 An example of CT scanning of the existing square battery is schematically shown. The Figure 1 is a top view cross-sectional view for observing along the length direction of the square battery 10. Among them, Figure 1 (a) is the CT scanning of the square battery 10 along the width direction, and the CT image of the cross section of the battery in the thickness direction can be photographed, Figure 1 (b) is the CT scanning of the square battery 10 along the thickness direction, and the CT image of the cross section of the battery in the width direction can be photographed. In addition, Figure 1 In the figure, "X" represents the X-ray source. UTILITY MODEL CONTENTS
[0005] Generally speaking, as Figure 1 shown, the square battery 10 has a diaphragm 11 and the like wound in its shell, and further an intermediate plate 12 is inserted inside the diaphragm 11. In addition, during the CT scanning of the square battery 10, the voltage and current are fixed to carry out scanning. In this case, since the length of the width direction of the square battery 10 is greatly different from that of the thickness direction, if the CT scanning along the width direction of the square battery 10 is carried out Figure 1(a) of the scan) is excessively increased and fixed, the X-ray penetration energy is relatively large or even exceeds the required range, resulting in the square battery 10 rotating to the thickness direction for scanning Figure 1 (b) of the scan) is excessively increased and fixed, the X-ray penetration energy is relatively large or even exceeds the required range, resulting in the square battery 10 rotating to the thickness direction for scanning Figure 1 (b) of the scan) is excessively decreased and fixed, the X-ray penetration energy is relatively small, resulting in the square battery 10 rotating to the width direction for scanning Figure 1 (a) of the scan) cannot sufficiently transmit the battery, the central part of the battery including the intermediate plate 12 becomes more blurred, and the image clarity of the CT scan in the width direction is affected. The above-mentioned problems become more significant when the square battery is more flat, i.e., the width-to-thickness ratio is larger. Specifically, the CT image of the central part of the battery starts to become blurred when the width-to-thickness ratio of the square battery is width 3:thickness 1, and the problem becomes significant when the width-to-thickness ratio is width 5:thickness 1.
[0006] The present application is completed in view of the above-mentioned problems in the prior art, and aims to provide a battery auxiliary scanning device for CT, which has excellent image clarity in each direction (e.g., the width direction and the thickness direction of the battery) of the CT scan regardless of the width-to-thickness ratio of the battery.
[0007] The present inventors have conducted repeated and in-depth research to achieve the above-mentioned purpose, focused on the change in the difference in the intensity of the X-ray in the square battery with a large width-to-thickness ratio, and tried to reduce the difference to enable uniform penetration of the battery. As a result, it was found that by providing a square battery with a specific shape of an auxiliary device, the CT image in each direction becomes clear regardless of the width-to-thickness ratio of the square battery and the CT scan. Specifically, by making a spherical body with a laminated structure like an onion, and sequentially setting each layer in the spherical body from the inside to the outside as a layer of different materials, i.e., alternately laminating a metal ball layer and a resin ball layer, in the case of CT scanning of the square battery, especially the square battery with a large width-to-thickness ratio, into the spherical body, the X-ray can uniformly penetrate the square battery with a large width-to-thickness ratio, so that the imaging in the radiation source receiving device behind the CT scan, which is a receiving inductor, is clearer, i.e., the CT image is clearer. In this way, by using the above-mentioned spherical body as a battery auxiliary scanning device for CT, even in the case of a large width-to-thickness ratio of the battery, the CT image in each direction of the battery can be stably and clearly captured without changing the voltage and current of the CT scan regardless of the width-to-thickness ratio of the battery, and the CT image of the central part including the intermediate plate 12 is always clear regardless of the rotation of the battery.
[0008] The utility model discloses based on above discovery and completes, its gist is as follows.
[0009] [1] A battery auxiliary scanning device for CT, characterized in that it is a battery auxiliary scanning device for square batteries,
[0010] The battery auxiliary scanning device is a spherical body, and has a square hole capable of inserting and storing a battery in the inner center,
[0011] The spherical body is a stacked structure in which a plurality of spherical layers are sequentially stacked outward from the spherical center,
[0012] The stacked structure is an alternating stack of metal spherical layers and resin spherical layers,
[0013] The square hole is a square opening hole, and passes through the spherical center of the spherical body in the depth direction.
[0014] [2] The battery auxiliary scanning device for CT according to [1], characterized in that the spherical centers of the plurality of spherical layers are substantially concentric,
[0015] Each of the metal spherical layers and the resin spherical layers is two or more layers,
[0016] The thickness of each single layer of the resin spherical layers is two or more times the thickness of each single layer of the metal spherical layers.
[0017] [3] The battery auxiliary scanning device for CT according to [2], characterized in that the thickness of each single layer of the resin spherical layers is three or more times the thickness of each single layer of the metal spherical layers.
[0018] [4] The battery auxiliary scanning device for CT according to [1] to [3], characterized in that the innermost layer of the spherical body is the resin spherical layer, and the outermost layer of the spherical body is the resin spherical layer.
[0019] [5] The battery auxiliary scanning device for CT according to [1] to [4], characterized in that the resin in the resin spherical layers is any one of polyethylene and polyvinyl chloride.
[0020] [6] The battery auxiliary scanning device for CT according to [1] to [5], characterized in that the metal in the metal spherical layers is a non-light metal.
[0021] [7] The battery auxiliary scanning device for CT according to [6], characterized in that the metal in the metal spherical layers is any one of iron, steel, copper, lead, gold, and silver.
[0022] Utility model effect
[0023] According to the present application, a battery-assisted scanning device for CT, which is excellent in image clarity in each direction of CT scanning (for example, width direction and thickness direction of the battery) regardless of the width-thickness ratio of the battery, can be provided. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 is a cross-sectional view schematically showing an example of CT scanning of a conventional square battery.
[0025] Figure 2 is a cross-sectional view schematically showing an example of CT scanning of a conventional square battery.
[0026] Figure 3 is a cross-sectional view schematically showing an example of CT scanning of a conventional square battery. DETAILED DESCRIPTION
[0027] Hereinafter, a battery-assisted scanning device for CT according to one embodiment of the present application will be described in detail with reference to the drawings. The following embodiment is illustrative, and merely represents an example of a general or specific example, and can take various forms. The numerical values, shapes, materials, component elements, arrangement positions and connection forms of the component elements, steps, and order of the steps shown in the following embodiment are merely one example, and are not intended to limit the present application. Furthermore, the component elements of the following embodiment that are not described in the independent claims are described as optional component elements. In addition, each drawing disclosed in the present specification is a schematic view in principle. That is, the dimensional ratio on the drawing does not necessarily coincide with the actual dimensional ratio, and the dimensional ratio does not necessarily coincide among the drawings. In each drawing, substantially the same components are denoted by the same reference numerals, and repeated description is omitted or simplified.
[0028] In addition, in the present specification, the terms indicating the relationship between the components and the terms indicating the shape of the components, and the numerical range are not only the terms indicating the strict meaning, but also include the terms indicating a range substantially equivalent thereto, for example, a range of several percent or so.
[0029] Hereinafter, a battery-assisted scanning device for CT according to one embodiment of the present application will be described in detail with reference to the drawings. The following embodiment is illustrative, and merely represents an example of a general or specific example, and can take various forms. The numerical values, shapes, materials, component elements, arrangement positions and connection forms of the component elements, steps, and order of the steps shown in the following embodiment are merely one example, and are not intended to limit the present application. Furthermore, the component elements of the following embodiment that are not described in the independent claims are described as optional component elements. In addition, each drawing disclosed in the present specification is a schematic view in principle. That is, the dimensional ratio on the drawing does not necessarily coincide with the actual dimensional ratio, and the dimensional ratio does not necessarily coincide among the drawings. In each drawing, substantially the same components are denoted by the same reference numerals, and repeated description is omitted or simplified.
[0030] The battery-assisted scanning device for CT of the embodiment is characterized in that it is a battery-assisted scanning device for a square battery, the battery-assisted scanning device is a spherical body, and has a square hole capable of inserting and accommodating the battery in the central part inside, the spherical body is a stacked structure in which a plurality of spherical layers are sequentially stacked from the center of the sphere outward, the stacked structure is an alternating stacking of metal spherical layers and resin spherical layers, the square hole is a square opening hole, and passes through the center of the sphere of the spherical body in the depth direction.
[0031] Figure 2 The schematic diagram of one example of the battery-assisted scanning device for CT of one embodiment of the utility model is shown schematically. Among them, Figure 2 (a) is the main view schematic diagram of the front of the device, Figure 2 (b) is Figure 2 the A-A view cross-sectional schematic diagram of (a). Figure 3 The top view cross-sectional schematic diagram of one example of the CT scanning of the square battery of one embodiment of the utility model is shown schematically. Figure 3 It is the top view cross-sectional schematic diagram observed along the length direction of the square battery 10 (i.e. the direction perpendicular to the drawing). Among them, Figure 3 (a) is the CT scanning of the square battery 10 along the width direction, which can shoot the CT image of the section in the thickness direction of the battery, Figure 3 (b) is the CT scanning of the square battery 10 along the thickness direction, which can shoot the CT image of the section in the width direction. In addition, Figure 3 In the figure, "X" represents the X-ray source.
[0032] As Figure 2 and Figure 3 shown, the battery-assisted scanning device for CT 100 is a battery-assisted scanning device for a square battery 10, the battery-assisted scanning device 100 is a spherical body, and has a square hole 101 capable of inserting and accommodating the battery 10 in the central part inside, the spherical body is a stacked structure in which a plurality of spherical layers are sequentially stacked from the center of the sphere C outward, the stacked structure is an alternating stacking of metal spherical layers 102 and resin spherical layers 103, the square hole 101 is a square opening hole, and passes through the center of the sphere C of the spherical body in the depth direction.
[0033] In the utility model, through adopting such CT battery auxiliary scanning device 100, especially in the case of CT scanning of the square battery 10 with large width-thickness ratio in the device, the X ray can uniformly penetrate the square battery 10 in each direction through the above structure, so that the imaging in the radiation source receiving device behind CT scanning, that is, the CT image, is clearer. In this way, by adopting the above structure of the spherical body as the CT battery auxiliary scanning device, even in the case of the square battery 10 with large width-thickness ratio, the CT image of each direction of the battery can be stably and clearly photographed without changing the voltage and current of CT scanning and being affected by the width-thickness ratio of the battery, and no matter how the battery rotates, the CT image of the central part including the intermediate plate 12 is always clear due to the uniform penetration effect of X ray brought by the battery auxiliary scanning device 100. Here, the unchanged voltage and current of CT scanning refer to not setting different voltage and current values for each scanning direction of the battery.
[0034] Hereinafter, the CT battery auxiliary scanning device 100 of the embodiment will be described in more detail. Figure 2 And Figure 3 The CT battery auxiliary scanning device 100 of the embodiment will be described in more detail.
[0035] In the embodiment, first, as shown in Figure 2 , the CT battery auxiliary scanning device 100 is a spherical body, and is a laminated structure of a plurality of spherical layers stacked and wrapped in turn from the spherical center C to the outside like a round onion. The laminated structure is alternately laminated by metal spherical layers 102 and resin spherical layers 103.
[0036] The inventors of the present application have found that such a metal and resin alternating multilayer stacked structure of the spheroid is similar to the internal structure / density distribution of the square battery 10. In addition, the spheroid is a three-dimensional shape with high symmetry. Therefore, it is found that, in the case of performing CT scanning on the square battery 10 in the device of the spheroid, the battery auxiliary scanning device 100 substantially becomes a complement of the internal structure / density of the square battery 10 in different directions, so that the system as a whole including the square battery 10 and the battery auxiliary scanning device 100 is homogenized in each direction. Thus, it is found that, when the above-mentioned system as a whole is subjected to CT scanning, it is similar to the case of CT scanning of a cylindrical battery, that is, by the multilayer spherical stacking of resin and metal, when X-rays pass through the spheroid in each scanning direction inside the spheroid, due to the homogenization of the system as a whole, the absorption, transmission and reflection of X-rays become independent of the shape of the measured object (i.e. the square battery) itself, and become uniform in each direction, as a result, X-rays can uniformly penetrate the spheroid in each direction of the square battery 10, and stable and clear imaging can be achieved for both CT scanning along the width direction of the square battery 10 and CT scanning along the thickness direction, without changing the voltage and current of the CT scanning.
[0037] In the present application, the above-mentioned multilayer spherical stacking structure is important for achieving image clarity of CT scanning in each direction. Here, in order to achieve sufficient homogenization of the system as a whole so that X-rays can uniformly penetrate the square battery 10 in each direction, the overall appearance of the battery auxiliary scanning device 100 for CT and each spherical layer inside it is a spheroid. It should be noted that, in the present specification, the spheroid means an approximately spherical body. From the above-mentioned point of view, the more the spheroid is a perfect sphere, the more preferred it is, but since the production of a perfect sphere is unrealistic and excessively increases the cost, the spheroid can also be set as an approximately perfect sphere. Within the scope of the effect of the present application, the spheroid can also have irregular shapes such as concave-convex on its surface and in each layer inside.
[0038] In addition, for the purpose of further sufficient homogenization of the system as a whole in each direction, the centers of the plurality of spherical layers stacked each become substantially concentric. Here, in the present application, the center of the sphere, in the case of a perfect sphere, refers to the center of the sphere of the sphere, and in the case of an approximately perfect spherical spheroid, it refers to the center of the circumscribed sphere of the spheroid. In addition, the substantially concentric means that the deviation value of the center of each spherical layer with respect to the center of the spheroid as a whole of the battery auxiliary scanning device 100 is within 1 / 6 of the radius value of the spheroid, preferably within 1 / 8, more preferably within 1 / 10, further preferably within 1 / 15, and more preferably within 1 / 20.
[0039] Further, in order to make the battery auxiliary scanning device 100 of the layered structure as close as possible to the internal structure of the square battery 10 so as to further sufficiently homogenize the system as a whole and thus enable the X-rays to more uniformly penetrate the square battery 10, the metal sphere layer 102 and the resin sphere layer 103 are preferably 2 or more layers, more preferably 3 or more layers, and further preferably 4 or more layers, respectively. There is no particular limitation on the upper limit of the number of layers, and the number of layers can be appropriately set according to the actual situation, but from the viewpoint of the convenience of production, the metal sphere layer 102 and the resin sphere layer 103 can be 10 or fewer layers, 8 or fewer layers, or 6 or fewer layers, respectively.
[0040] Further, in order to make the battery auxiliary scanning device 100 of the layered structure as close as possible to the internal structure of the square battery 10 so as to further sufficiently homogenize the system as a whole and thus enable the X-rays to more uniformly penetrate the square battery 10, the resin sphere layer 103 is preferably thicker than the metal sphere layer 102, and the thickness of each single layer of the resin sphere layer 103 is preferably 2 or more times, more preferably 3 or more times, and further preferably 4 or more times the thickness of each single layer of the metal sphere layer 102. There is no particular limitation on the upper limit of the ratio of the respective thicknesses, and the thickness of each single layer of the resin sphere layer 103 can be 20 or fewer times, 10 or fewer times, 8 or fewer times, or 6 or fewer times the thickness of each single layer of the metal sphere layer 102. The thickness of the resin sphere layer 103 and the metal sphere layer 102 can be measured, for example, by using a vernier caliper or the like.
[0041] In the battery auxiliary scanning device 100 of the present embodiment, in order to perform CT scanning of the square battery 10, a hole having a square opening, i.e., a square hole 101, is provided in the device. Thus, the square battery 10 can be inserted and housed in the central interior of the spherical body. Note that the square opening refers to an opening that is square in shape in a front view, i.e., an opening that is substantially square in shape when viewed in the depth direction of the square hole 101. Figure 2 (a) the opening that is square in shape in the front view, i.e., the opening that is substantially square in shape when viewed in the depth direction of the square hole 101. Further, the square hole 101 passes through the center C of the spherical body in the depth direction. Thus, the square battery 10 can be substantially housed in the central interior of the battery auxiliary scanning device 100 of the spherical body, which contributes to the homogenization of the system as a whole in each direction, and uniform penetration of X-rays is possible. Here, the depth direction of the square hole 101 refers to a direction that is substantially parallel to the insertion direction of the square battery 10, i.e., a direction that is substantially parallel to the direction in which the square battery 10 is inserted into the square hole 101. Figure 2The two dotted lines in (b) are approximately parallel. The size and depth of the square hole 101 are not particularly limited, as long as the square battery 10 can be inserted and completely housed in the battery-assisted scanning device 100. Furthermore, the square battery 10 after insertion can ensure that the surface to be imaged is perpendicular to the emission direction of the X-rays when CT scanning is performed. Note that even if there is a gap between the square battery 10 after insertion and the square hole 101, the imaging effect is not affected. In order to further obtain the above effect, it is preferable that the square battery 10 is located as close as possible to the center of the spherical body of the battery-assisted scanning device 100. In addition, for the above purpose, as shown in Figure 2 As shown in (a), it is preferable that the two diagonal lines (dotted lines in (a)) of the square opening of the square hole 101 pass through the front projection of the center C of the spherical body. Figure 2 As shown in (a), it is preferable that the two diagonal lines (dotted lines in (a)) of the square opening of the square hole 101 pass through the front projection of the center C of the spherical body.
[0042] In addition, regarding the material of the metal sphere layer 102 and the resin sphere layer 103, as long as the X-rays can uniformly pass through and imaging can be performed, there is no particular requirement. The metal in the metal sphere layer 102 can be set to a non-light metal, for example, can be set to a heavy metal, for example, can be set to any one of iron, steel, copper, lead, gold, silver. The resin in the resin sphere layer 103 can be set to any one of polyethylene, polyvinyl chloride, for example.
[0043] In addition, regarding the type of the sphere layer at the innermost and outermost of the battery-assisted scanning device 100, there is no particular limitation, and it can be appropriately set according to the actual situation, but for the sake of simplicity of production, it is preferable that the innermost layer of the spherical body is the resin sphere layer 103. In addition, it is preferable that the outermost layer of the spherical body is the resin sphere layer 103.
[0044] According to the battery-assisted scanning device 100 for CT according to the above-described embodiment, after the square battery 10 is placed, the entire system can be homogenized in each direction, and even if the voltage and current of the CT scanning are not changed, stable and clear imaging can be achieved for both the CT scanning in the width direction and the CT scanning in the thickness direction of the square battery 10, and the CT image of the central part of the battery including the intermediate plate 12 is always clear. Such a battery-assisted scanning device 100 is particularly suitable for a square battery 10 with a large width-to-thickness ratio.
[0045] Next, the overall configuration of the CT scan using the battery-assisted scanning device 100 described above will be described. The overall configuration of the CT scan using the battery-assisted scanning device 100 described above includes, in order, a CT device as an X-ray source, a stage located below the battery-assisted scanning device 100 of the present embodiment in the direction of emission of X-rays, a radiation source receiving device as a receiving sensor located behind the CT scan, and an image generating device electrically connected to the radiation source receiving device and used to generate a CT image. The battery-assisted scanning device 100 of the present embodiment is placed on the stage described above, and the stage is rotated to change the direction of scanning, i.e., the width direction and the thickness direction of the battery. The CT device can use, for example, an inspeXio SMX-225CT manufactured by Shimadzu Corporation, and can be set to, for example, an X-ray tube voltage of 190 to 210 kV and a tube current of 40 to 80 μA.
[0046] The present application has been described above according to the presently preferred embodiments, but the disclosed content should not be construed as limiting. Various modifications and changes will be apparent to those skilled in the art from reading the above disclosure. For example, in the above-described embodiments, the battery-assisted scanning device is configured as a spherical body, but in order to homogenize the system as a whole during CT scanning, it can also be configured as a cylindrical body and placed on the stage with the bottom surface of the cylindrical body. In this case, the metal layer and the resin layer alternately stacked are also configured as a cylindrical shape. Therefore, the appended claims should be construed as including all modifications and changes without departing from the true spirit and scope of the present application.
[0047] Industrial applicability
[0048] According to the present application, a battery-assisted scanning device for CT can be provided, which is excellent in image clarity in each direction of CT scanning, regardless of the width-thickness ratio of the battery.
[0049] Explanation of symbols
[0050] 10 square battery
[0051] 11 separator
[0052] 12 intermediate plate
[0053] 100 battery-assisted scanning device for CT
[0054] 101 square hole
[0055] 102 metal sphere layer
[0056] 103 resin sphere layer
Claims
1. A battery-assisted scanning device for CT scans, characterized in that, It is a battery-assisted scanning device used for square batteries. The battery-assisted scanning device is spherical, with a square hole in the center inside for inserting and storing a battery. The spherical body has a layered structure consisting of multiple spherical layers stacked sequentially from the center outwards. The layered structure consists of alternating layers of metal spheres and resin spheres. The square hole is a hollow hole with a square opening, and it passes through the center of the sphere in the depth direction.
2. The battery-assisted scanning device for CT according to claim 1, characterized in that, The centers of the multiple spherical layers are approximately concentric. The metal sphere layer and the resin sphere layer each have two or more layers. The thickness of each single layer of the resin ball layer is more than twice the thickness of each single layer of the metal ball layer.
3. The battery-assisted scanning device for CT according to claim 2, characterized in that, The thickness of each individual resin ball layer is more than three times the thickness of each individual metal ball layer.
4. The battery-assisted scanning device for CT according to any one of claims 1 to 3, characterized in that, The innermost layer of the sphere is the resin ball layer, and the outermost layer of the sphere is the resin ball layer.
5. The battery-assisted scanning device for CT according to any one of claims 1 to 3, characterized in that, The resin in the resin ball layer is either polyethylene or polyvinyl chloride.
6. The battery-assisted scanning device for CT according to any one of claims 1 to 3, characterized in that, The metal in the metal spheres is a non-light metal.
7. The battery-assisted scanning device for CT according to claim 6, characterized in that, The metal in the metal sphere is any one of iron, steel, copper, lead, gold, and silver.