Positioning device for three-coordinate dimension detection of cylindrical battery cell

Abstract

The utility model relates to the technical field of battery detection, and discloses a positioning device for detecting the three-coordinate size of a cylindrical battery cell, which comprises a bottom plate, a cylindrical supporting column, an adsorption structure, a positioning part and a limiting part, the cylindrical supporting column is fixed on the bottom plate through the limiting part, and the adsorption structure is arranged at the upper end of the cylindrical supporting column and is used for adsorbing and fixing the cylindrical battery cell. The radius of the cylindrical supporting column is smaller than that of the cylindrical battery cell, the periphery of the limiting part protrudes out of the periphery of the cylindrical supporting column, the periphery of the limiting part is provided with a first arc surface, the curvature center connecting line of the first arc surface coincides with the central axis of the cylindrical supporting column, and the positioning part is movably arranged on the bottom plate and located on one side of the cylindrical supporting column. The positioning part is provided with a positioning surface which abuts against the periphery of the cylindrical battery cell and the first arc surface, and the distance between the positioning surface and the axis of the cylindrical supporting column is larger than the radius of the cylindrical supporting column. The positioning device provided by the utility model does not shield the edge of the bottom surface, the peripheral surface and the top surface of the cylindrical battery cell, and meets the requirement of three-coordinate size detection.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a positioning device for three-coordinate dimension testing of cylindrical battery cells. Background Technology

[0002] After the cylindrical battery cell is manufactured, not only its relevant performance indicators need to be tested, but its three-coordinate dimensions also need to be tested.

[0003] Currently, when using a contact-type coordinate measuring machine (CMM) to inspect the coordinate dimensions of cylindrical battery cells, the cylindrical battery cell needs to be fixed in place. Then, points are taken on the outer circumference, bottom, and top surfaces of the cylindrical battery cell to measure parameters such as diameter, perpendicularity, cylindricity, and flatness. However, using conventional positioning fixtures to position the cylindrical battery cell obstructs the entire bottom surface and part of the outer circumference, limiting the sampling points and affecting inspection accuracy and efficiency. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a positioning device for three-coordinate dimension detection of cylindrical battery cells, which does not obstruct the edge of the bottom surface, the outer peripheral surface, or the top surface of the cylindrical battery cell, and can meet the detection requirements of the three-coordinate dimension detection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A positioning device for three-coordinate dimension detection of a cylindrical battery cell is provided, comprising a base plate, a cylindrical support column, an adsorption structure, a positioning part, and a limiting part. The cylindrical support column is fixed on the limiting part, and the limiting part is fixed on the base plate. The adsorption structure is installed on the upper end of the cylindrical support column for adsorbing and fixing the cylindrical battery cell. The radius of the cylindrical support column is smaller than the radius of the cylindrical battery cell. The outer periphery of the limiting part protrudes from the outer periphery of the cylindrical support column. The outer periphery of the limiting part has a first arc surface, and the line connecting the curvature centers of the first arc surface coincides with the central axis of the cylindrical support column. The positioning part is movably disposed on the base plate and located on one side of the cylindrical support column. The positioning part has a positioning surface for abutting against the outer periphery of the cylindrical battery cell and the first arc surface. The distance between the positioning surface and the axis of the cylindrical support column is greater than the radius of the cylindrical support column. The edge of the bottom surface of the cylindrical battery cell abutting against the positioning surface is exposed outside the cylindrical support column.

[0007] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the positioning part is provided with a positioning groove on the side facing the limiting part, the groove opening of the positioning groove faces the limiting part and the cylindrical support column, and the groove wall surface of the positioning groove is the positioning surface.

[0008] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the positioning surface is a second arc surface that abuts against the first arc surface and the outer periphery of the cylindrical battery cell.

[0009] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the positioning groove has a first plane and a second plane arranged at an angle of less than 180°, the first plane and the second plane being tangent to the first arc surface, and the first plane and the second plane constituting the positioning surface.

[0010] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the positioning groove has a bottom surface facing the limiting part and two opposing side walls. The bottom surface and the two side walls are respectively tangent to the first arc surface, and the bottom surface and the two side walls constitute the positioning surface.

[0011] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the positioning groove extends vertically through the positioning part.

[0012] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the limiting part is cylindrical, the first arc surface is the outer circumferential surface of the limiting part, the limiting part is coaxial with the cylindrical support column, and the radius of the limiting part is equal to the radius of the cylindrical battery cell.

[0013] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the difference between the radius of the cylindrical battery cell and the radius of the cylindrical support column is 4-6 mm.

[0014] As a further embodiment of the positioning device for three-coordinate dimension detection of cylindrical battery cells, the adsorption structure includes multiple magnets, which are spaced apart at the upper end of the cylindrical support column.

[0015] As a further embodiment of the positioning device for three-coordinate measurement of cylindrical battery cells, the upper end of the cylindrical support column is provided with multiple mounting slots spaced apart, and a magnet is installed in each mounting slot. The upper end face of the cylindrical support column protrudes beyond the upper end face of the magnet.

[0016] Beneficial effects: This utility model, by setting a limiting part below the cylindrical support column, can limit the position of the positioning part through the first arc surface of the limiting part; by abutting the outer periphery of the cylindrical battery cell with the first arc surface, the horizontal position of the cylindrical battery cell on the cylindrical support column can be positioned. After the cylindrical battery cell is adsorbed and fixed on the cylindrical support column, the edge of the bottom surface of the cylindrical battery cell can be exposed on the cylindrical support column, which is convenient for taking points for testing at the edge position of the bottom surface of the cylindrical battery cell using a three-coordinate measuring machine. By taking points for testing at the edge position, the requirements of three-coordinate measuring machine can be met. Since the positioning part is movable, after the cylindrical battery cell is positioned and adsorbed and fixed on the cylindrical support column, the positioning part can be moved away, so that the entire outer periphery of the cylindrical battery cell is exposed, thereby allowing the three-coordinate measuring machine to take points for testing at any position on the outer periphery of the cylindrical battery cell; the top surface of the cylindrical battery cell is also exposed, and points can be taken for testing as needed. The positioning device for three-coordinate dimension detection of cylindrical battery cells in this embodiment has a simple structure and is easy to operate. When performing three-coordinate dimension detection, the positioning device does not obstruct the edge of the bottom surface of the cylindrical battery cell, nor the outer peripheral surface or the top surface of the cylindrical battery cell, thus meeting the requirements for three-coordinate dimension detection. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the positioning device for three-coordinate dimension detection of cylindrical battery cells according to an embodiment of the present invention, when positioning a cylindrical battery cell;

[0019] Figure 2 This is a schematic diagram illustrating the state of the bottom surface of a cylindrical battery cell detected by a three-coordinate dimensional detection device according to an embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the positioning device for three-coordinate dimension detection of cylindrical battery cells according to an embodiment of the present invention;

[0021] Figure 4 This is a top view of the positioning part described in an embodiment of the present utility model. Figure 1 ;

[0022] Figure 5 This is a top view of the positioning part described in an embodiment of the present utility model. Figure 2 ;

[0023] Figure 6 This is a top view of the positioning part described in an embodiment of the present utility model. Figure 3 ;

[0024] Figure 7 This is a schematic diagram of the combined structure of the adsorption structure, cylindrical support column, and limiting part described in the embodiment of this utility model.

[0025] In the picture:

[0026] 1. Base plate; 2. Cylindrical support column; 21. Mounting groove; 3. Adsorption structure; 31. Magnet; 4. Positioning part; 41. Positioning groove; 411. Second arc surface; 412. First plane; 413. Second plane; 414. Groove bottom surface; 415. Groove side wall surface; 5. Limiting part; 51. First arc surface;

[0027] 100. Cylindrical battery cell; 200. Three-coordinate measuring device. Detailed Implementation

[0028] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0032] Example 1

[0033] like Figures 1 to 3 As shown, this embodiment provides a positioning device for three-coordinate dimension detection of a cylindrical battery cell, including a base plate 1, a cylindrical support column 2, an adsorption structure 3, a positioning part 4, and a limiting part 5. The cylindrical support column 2 is fixed on the limiting part 5, and the limiting part 5 is fixed on the base plate 1. The adsorption structure 3 is installed on the upper end of the cylindrical support column 2 for adsorbing and fixing the cylindrical battery cell 100. The radius of the cylindrical support column 2 is smaller than the radius of the cylindrical battery cell 100. The outer periphery of the limiting part 5 protrudes from the outer periphery of the cylindrical support column 2. The outer periphery has a first arc surface 51, and the line connecting the curvature centers of the first arc surface 51 coincides with the central axis of the cylindrical support column 2. The positioning part 4 is movably disposed on the base plate 1 and located on one side of the cylindrical support column 2. The positioning part 4 has a positioning surface for abutting against the outer periphery of the cylindrical cell 100 and the first arc surface 51. The distance between the positioning surface and the axis of the cylindrical support column 2 is greater than the radius of the cylindrical support column 2. The edge of the bottom surface of the cylindrical cell 100 that abuts against the positioning surface is exposed outside the cylindrical support column 2.

[0034] It is understandable that when the positioning surface of the positioning part 4 on the base plate 1 abuts against the first arc surface 51 of the limiting part 5, the position of the positioning part 4 can be limited; when the outer periphery of the cylindrical battery cell 100 abuts against the first arc surface 51, the horizontal position of the cylindrical battery cell 100 on the cylindrical support column 2 can be positioned. After the cylindrical battery cell 100 is adsorbed and fixed on the cylindrical support column 2, the edge of the bottom surface of the cylindrical battery cell 100 can be exposed on the cylindrical support column 2, which is convenient for the three-coordinate measuring device 200 to measure the cylindrical battery cell. The edge of the bottom surface of the battery cell 100 is sampled for testing. By sampling at the edge, the requirements for three-coordinate measurement can be met. Since the positioning part 4 is movable, after the cylindrical battery cell 100 is positioned and fixed on the cylindrical support column 2, the positioning part 4 can be moved away, exposing the entire outer peripheral surface of the cylindrical battery cell 100. This allows the three-coordinate measurement device 200 to sample at any position on the outer peripheral surface of the cylindrical battery cell 100 for testing. The top surface of the cylindrical battery cell 100 is also exposed, and sampling can be performed as needed. The positioning device for three-coordinate measurement of cylindrical battery cells in this embodiment has a simple structure and is easy to operate. When performing three-coordinate measurement, the positioning device does not obstruct the edge of the bottom surface, the outer peripheral surface, or the top surface of the cylindrical battery cell 100, thus meeting the requirements for three-coordinate measurement and improving the accuracy and efficiency of the measurement.

[0035] In this embodiment, the positioning part 4 is movably disposed on the base plate 1, meaning that the positioning part 4 can move relative to the base plate 1. Specifically, in this embodiment, there is no connection between the positioning part 4 and the base plate 1. The positioning part 4 is simply placed on the base plate 1 when it is needed to position the cylindrical battery cell 100, so that the positioning surface of the positioning part 4 abuts against the first arc surface 51 of the limiting part 5. When the cylindrical battery cell 100 abuts against the positioning surface and is fixed to the upper end of the cylindrical support column 2, the positioning of the cylindrical battery cell 100 is completed. After the positioning is completed, the positioning part 4 can be removed.

[0036] In other embodiments, the positioning part 4 can be connected to the base plate 1 via a guide structure to allow the positioning part 4 to move closer to or further away from the cylindrical support column 2. The guide structure can be a conventional combination of a guide rail and a slide block. The connection between the guide structure, the positioning part 4, and the base plate 1 is a conventional technique in the art and will not be described in detail here.

[0037] In this embodiment, the four corners of the base plate 1 are each fixed to the frame (not shown in the figure) by a bolt.

[0038] Furthermore, a positioning groove 41 is provided on the side of the positioning part 4 facing the limiting part 5. The groove opening of the positioning groove 41 faces the limiting part 5 and the cylindrical support column 2, and the groove wall surface of the positioning groove 41 is the positioning surface.

[0039] When positioning the cylindrical battery cell 100, the groove opening of the positioning groove 41 of the positioning part 4 is aligned with the limiting part 5 and the cylindrical support column 2, and the positioning part 4 is pushed until the groove wall surface (positioning surface) of the positioning groove 41 abuts against the first arc surface 51 of the limiting part 5 to complete the positioning of the positioning part 4. In this embodiment, by designing the groove wall surface of the positioning groove 41 as the positioning surface, rapid positioning can be achieved.

[0040] Optionally, such as Figure 3 and 4 As shown, the positioning surface is the second arc surface 411 that abuts against the first arc surface 51 and the outer periphery of the cylindrical cell 100. That is, the groove wall surface of the positioning groove 41 is the second arc surface 411. The first arc surface 51 abuts against and fits against the second arc surface 411, thus completing the position limitation of the positioning part 4, which is convenient to operate.

[0041] In other embodiments, the groove wall of the positioning groove 41 may also be designed as a V-shaped structure. For example... Figure 5 As shown, the positioning groove 41 has a first plane 412 and a second plane 413 arranged at an angle of less than 180°, that is, the positioning groove 41 has a V-shaped structure. The first plane 412 and the second plane 413 are tangent to the first arc surface 51, and the first plane 412 and the second plane 413 constitute the positioning surface.

[0042] After the first plane 412 and the second plane 413 of the positioning part 4 come into contact with the first arc surface 51 of the limiting part 5, the cylindrical battery cell 100 then comes into contact with the first plane 412 and the second plane 413. The outer periphery of the cylindrical battery cell 100 abuts against the first plane 412 and the second plane 413 respectively and is fixed on the cylindrical support column 2 by the adsorption structure 3, thereby realizing the positioning of the cylindrical battery cell 100.

[0043] Optionally, the included angle between the first plane 412 and the second plane 413 is 90°, 95°, 100°, 105°, 110°, 120°, 130°, 140°, 150° or 160°, depending on the dimensions of the positioning part 4 and the limiting part 5.

[0044] In other embodiments, such as Figure 6 As shown, the positioning groove 41 has a groove bottom surface 414 facing the limiting part 5 and two opposing groove side wall surfaces 415. The groove bottom surface 414 and the two groove side wall surfaces 415 can be simultaneously tangent to the first arc surface 51, and the groove bottom surface 414 and the two groove side wall surfaces 415 constitute a positioning surface. By simultaneously abutting the groove bottom surface 414 and the two groove side wall surfaces 415 with the first arc surface 51 of the limiting part 5, the position of the positioning part 4 can be fixed. The outer periphery of the cylindrical battery cell 100 abuts against the groove bottom surface 414 and the two groove side wall surfaces 415 respectively and is fixed on the cylindrical support column 2, thus completing the positioning of the cylindrical battery cell 100.

[0045] Furthermore, the positioning groove 41 extends vertically through the positioning part 4. The upper end of the positioning part 4 only needs to protrude from the upper end of the cylindrical support column 2 so that the outer periphery of the cylindrical cell 100 can abut against the positioning surface of the positioning groove 41. This reduces the height of the positioning part 4 while ensuring positioning accuracy.

[0046] Of course, in other embodiments, the upper end of the positioning groove 41 can also be sealed. In this case, the upper sidewall of the positioning groove 41 needs to be designed to be no lower than the top surface of the cylindrical cell 100 on the cylindrical support column 2.

[0047] Furthermore, the limiting part 5 is cylindrical, the first arc surface 51 is the outer peripheral surface of the limiting part 5, and the limiting part 5 is coaxial with the cylindrical support column 2.

[0048] By designing the limiting part 5 as a cylinder, the positioning part 4 can be moved to any side of the limiting part 5 to achieve contact and fit with the first arc surface 51 and the second arc surface 411, making the position limitation of the positioning part 4 more convenient and quick.

[0049] In this embodiment, the limiting part 5 is fixed to the base plate 1 by screws.

[0050] Specifically, the lower surface of the limiting part 5 is provided with two threaded holes spaced apart, and the base plate 1 is provided with two connecting holes that correspond one-to-one with the threaded holes. Two screws pass through one of the connecting holes and are screwed into the corresponding threaded holes, thereby fixing the limiting part 5 on the base plate 1.

[0051] Optionally, the difference between the radius of the cylindrical cell 100 and the radius of the cylindrical support column 2 is 4-6mm. That is, with the positioning assistance of the positioning part 4, when the cylindrical cell 100 is fixed to the upper end of the cylindrical support column 2 by the adsorption structure 3, the width of the bottom surface of the cylindrical cell 100 exposed outside the edge of the cylindrical support column 2 is 4-6mm. This width is convenient for point sampling and testing.

[0052] For example, the difference between the diameter of the cylindrical cell 100 and the diameter of the cylindrical support column 2 in this embodiment is 4mm, 4.5mm, 5mm, 5.5mm or 6mm, depending on the actual size of the cylindrical cell 100.

[0053] Preferably, the difference between the radius of the cylindrical cell 100 and the radius of the cylindrical support column 2 is 5mm, that is, the width of the bottom surface of the cylindrical cell 100 located directly above the cylindrical support column 2 exposed beyond the edge of the cylindrical support column 2 is 5mm. By using this difference, the positioning accuracy requirements of the positioning part 4 on the cylindrical cell 100 can be reduced.

[0054] like Figure 3 and Figure 7As shown, the adsorption structure 3 includes multiple magnets 31, which are spaced apart at the upper end of the cylindrical support column 2. By adsorbing the multiple magnets 31 at multiple points on the bottom surface of the cylindrical battery cell 100, the cylindrical battery cell 100 can be stably placed on the cylindrical support column 2.

[0055] When magnet 31 is installed on the upper end of cylindrical support column 2 and protrudes from or is substantially flush with the upper surface of cylindrical support column 2, it is difficult to ensure that the upper surfaces of all magnets 31 are on the same plane. When cylindrical cell 100 is magnetically fixed to cylindrical support column 2, it will affect the horizontal positioning accuracy of cylindrical cell 100, thereby affecting the three-coordinate dimension detection accuracy of cylindrical cell 100. Therefore, in this embodiment, multiple mounting slots 21 are spaced apart on the upper surface of cylindrical support column 2, and a magnet 31 is installed in each mounting slot 21. The upper surface of cylindrical support column 2 protrudes from the upper surface of magnet 31, thereby avoiding the installation accuracy of magnet 31 from affecting the positioning accuracy of cylindrical cell 100.

[0056] Furthermore, multiple mounting slots 21 are arranged in a ring at intervals along the edge of the cylindrical support column 2 and are evenly distributed so that the bottom surface of the cylindrical cell 100 can be stably attached and fixed to the upper end surface of the cylindrical support column 2 under the uniformly distributed magnetic attraction force.

[0057] In other embodiments, the adsorption structure 3 is not limited to a magnetic structure, but can also be a suction cup structure. For example, the suction cup is set in the limiting groove opened on the cylindrical support column 2, and the cylindrical battery cell 100 is adsorbed and fixed on the cylindrical support column 2 by the suction cup. Of course, this suction cup adsorption structure will affect the positioning accuracy of the cylindrical battery cell 100 to a certain extent. When the positioning accuracy requirement of the cylindrical battery cell 100 is low, this suction cup adsorption structure can also be considered.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A positioning device for three-coordinate dimension detection of a cylindrical battery cell, characterized in that, The application relates to a cylindrical battery cell fixing device, which comprises a bottom plate, a cylindrical supporting column, an adsorption structure, a positioning part and a limiting part, wherein the cylindrical supporting column is fixed on the limiting part, the limiting part is fixed on the bottom plate, the adsorption structure is installed on the upper end of the cylindrical supporting column and used for adsorbing and fixing a cylindrical battery cell, the radius of the cylindrical supporting column is smaller than the radius of the cylindrical battery cell, the outer periphery of the limiting part protrudes from the outer periphery of the cylindrical supporting column, the outer periphery of the limiting part has a first circular arc surface, the center line of the first circular arc surface coincides with the central axis of the cylindrical supporting column, the positioning part is movably arranged on the bottom plate and located on one side of the cylindrical supporting column, the positioning part has a positioning surface used for abutting against the outer periphery of the cylindrical battery cell and the first circular arc surface, the distance between the positioning surface and the axis of the cylindrical supporting column is greater than the radius of the cylindrical supporting column, and the edge of the bottom surface of the cylindrical battery cell abutting against the positioning surface is exposed to the cylindrical supporting column.

2. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 1, characterized in that The side of the positioning part towards the limiting part is provided with a positioning groove, the groove opening of the positioning groove faces the limiting part and the cylindrical supporting column, and the groove wall surface of the positioning groove is the positioning surface.

3. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 2, characterized in that The positioning surface is a second circular arc surface abutting against the first circular arc surface and the outer periphery of the cylindrical battery cell.

4. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 2, characterized in that The positioning groove has a first plane and a second plane arranged at an included angle smaller than 180 DEG, the first plane and the second plane are respectively tangent to the first circular arc surface, and the first plane and the second plane constitute the positioning surface.

5. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 2, characterized in that The positioning groove has a groove bottom surface opposite to the limiting part and two groove side wall surfaces, the groove bottom surface and the two groove side wall surfaces are respectively tangent to the first circular arc surface, and the groove bottom surface and the two groove side wall surfaces constitute the positioning surface.

6. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 2, characterized in that The positioning groove penetrates the positioning part in the vertical direction.

7. The positioning device for three-dimensional size detection of cylindrical battery cells according to any one of claims 1 to 6, characterized in that The limiting part is cylindrical, the first circular arc surface is the outer peripheral surface of the limiting part, the limiting part is coaxial with the cylindrical supporting column, and the radius of the limiting part is equal to the radius of the cylindrical battery cell.

8. The positioning device for three-dimensional size detection of cylindrical battery cells according to any one of claims 1 to 6, characterized in that The difference between the radius of the cylindrical battery cell and the radius of the cylindrical supporting column is 4-6 mm.

9. The positioning device for three-dimensional size detection of cylindrical battery cells according to any one of claims 1 to 6, characterized in that The adsorption structure comprises a plurality of magnets, and the plurality of magnets are arranged at intervals on the upper end of the cylindrical supporting column.

10. The positioning device for three-dimensional size detection of cylindrical battery cells according to claim 9, characterized in that The upper end of the cylindrical supporting column is provided with a plurality of mounting grooves, one magnet is arranged in each mounting groove, and the upper end surface of the cylindrical supporting column protrudes from the upper end surface of the magnet.

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