Battery cell size measuring device and battery cell conveying mechanism

Abstract

The utility model provides a battery cell size measuring device and a battery cell conveying mechanism, the battery cell size measuring device comprises a battery cell taking clamp and a detection assembly, the battery cell taking clamp is used for clamping a battery cell and moving the clamped battery cell to a detection range of the detection assembly, and the battery cell taking clamp is also used for rotating the battery cell by at least 180 degrees; the two detection assemblies are arranged in the axial direction of the battery cell, the detection assemblies are both used for collecting the diameter of the battery cell in the rotating process for multiple times in the radial direction, the height value of the battery cell from the first end to the second end can be detected through the two detection assemblies, and the first end and the second end are the two opposite ends of the battery cell in the axial direction. The cell size measuring device provided by the utility model can detect the diameter and the height value of the cell at the same time, and solves the problem that the existing cell size measuring device is single in detection parameter.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a battery cell size measuring device and a battery cell conveying mechanism. Background Art

[0002] Lithium-ion batteries are widely used in various electronic devices or power equipment due to their high energy density, light weight and flexible structure. With the widespread application of lithium-ion batteries, the requirements for lithium-ion batteries are getting higher and higher, and therefore the requirements for lithium-ion battery manufacturing equipment are also getting higher and higher.

[0003] After the preparation of lithium-ion battery cells, diameter detection is required to facilitate the subsequent shell insertion process. If the diameter of the cell is too large, the guide post will fail to enter the shell, damaging the cell, resulting in high manufacturing costs. Existing cell diameter detection equipment generally only detects the diameter of the cell, and the detection parameters are single. As the requirements for lithium-ion batteries become higher and higher, the requirements for various data of the cell are also more stringent. Simply detecting the diameter of the cell may not meet the detection requirements for the cell size. In addition, if multiple sets of detection equipment are used to detect the size of the cell, it not only increases the detection cost, but also makes the detection process cumbersome. Utility Model Content

[0004] The utility model aims to solve the problem that the existing battery core size measuring device has a single detection parameter.

[0005] In order to solve the above problems, the first aspect of the present invention provides a battery cell size measuring device, comprising:

[0006] A battery cell picking clamp, the battery cell picking clamp is used to pick up the battery cell, move the picked up battery cell into the detection range of the detection component, and the battery cell picking clamp is also used to rotate the battery cell by at least 180°;

[0007] The two groups of detection components are arranged along the axial direction of the battery core, and the detection components are used to collect the diameter of the battery core multiple times in the radial direction during the rotation process. The height value of the battery core from the first end to the second end can also be detected by the two groups of detection components. The first end and the second end are the two opposite ends of the battery core along the axial direction.

[0008] Furthermore, it also includes a flattening assembly, two groups of which are respectively arranged on both sides of the battery cell picking clamp, and the two groups of which flatten the tabs at the first end and the second end of the battery cell respectively.

[0009] Furthermore, the flattening assembly includes a first driving member and a flat plate. The flattening plates of the two flattening assemblies are relatively arranged at both ends of the battery cell along the axial direction. The flattening plates are used to flatten the pole ears at the ends of the battery cell. The first driving member is used to drive the flattening plate to move along the axial direction of the battery cell so that the flattening plate is close to or away from the end of the battery cell, and the end refers to the first end or the second end of the battery cell.

[0010] Furthermore, the pressing plate is a transparent pressing plate.

[0011] Furthermore, it also includes a mounting frame and a lifting assembly, the battery cell picking clamp, the detection assembly and the lifting assembly are all arranged on the mounting frame, the lifting assembly includes a lifting plate and a second driving member, the lifting plate is slidably arranged on the mounting frame in a vertical direction, the battery cell picking clamp is arranged on the lifting plate, the lifting plate is connected to the second driving member, and the second driving member is used to drive the lifting plate to drive the battery cell picking clamp to move in the vertical direction.

[0012] Furthermore, the battery cell picking clamp includes an active roller, a third driving member and at least one driven roller, the active roller and the driven roller are used to clamp the battery cell, the third driving member is connected to the active roller, the third driving member is used to drive the active roller and the driven roller to clamp the battery cell, and the third driving member is also used to drive the active roller to rotate and drive the battery cell and the driven roller to rotate.

[0013] Furthermore, it also includes a connecting rod, which extends along the axial direction of the battery cell. Each group of the detection components includes a lifting bracket and a CCD detection head. The two CCD detection heads are both inserted into the connecting rod. The two lifting brackets are respectively arranged at both ends of the connecting rod, and the two lifting brackets are slidably connected to the connecting rod to enable the connecting rod to move in the vertical direction.

[0014] Furthermore, the two CCD detection heads can move relative to the connecting rod and can be locked with the connecting rod.

[0015] Furthermore, it also includes a light source, which is arranged on the lifting plate, located between the two CCD detection heads, and is a backlight source.

[0016] The second aspect of the utility model provides a battery cell conveying mechanism, comprising a conveying mechanism and a battery cell size measuring device as described in the first aspect, wherein the battery cell size measuring device is arranged on the conveying mechanism, the conveying mechanism is used to convey the battery cell, and the battery cell size measuring device is used to measure the diameter and height value of the battery cell.

[0017] The battery cell size measuring device described in the utility model collects the diameter of the battery cell in the radial direction through the detection component, which can avoid the problem of the battery cell being tilted at the angle of photography or the battery cell being tilted, so that the projection area of ​​the battery cell can be obtained more accurately, so as to obtain the diameter of the battery cell more accurately. Moreover, in this embodiment, the battery cell is rotated multiple times by the battery cell picking clamp, and the diameters of multiple different detection areas in the radial direction are obtained during the rotation of the battery cell, rather than being limited to the diameter of a single detection area, which can improve the accuracy of the battery cell diameter detection. In addition, in this embodiment, two groups of detection components are set, and the two groups of detection components are respectively set at the two ends of the battery cell. The height value of the battery cell can be obtained through the two groups of detection components, so as to realize the simultaneous detection of the diameter and height value of the battery cell, which solves the problem of the existing battery cell size measuring device having a single detection parameter, and the battery cell size detection device of this embodiment has low cost and simple operation, which reduces the cost of battery cell size detection.

[0018] The battery cell conveying mechanism described in the utility model can continuously convey the battery cells to the battery cell size measuring device for detection by arranging the battery cell size measuring device on the conveying mechanism, so that the battery cell size detection process can be better connected with the previous process and the next process, which is beneficial to improving the production efficiency of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery cell size measuring device provided in an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the main structure of the battery cell size measuring device provided in an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the top view of the structure of the battery cell size measuring device provided in an embodiment of the utility model;

[0022] Figure 4 It is a side structural schematic diagram of a battery cell size measuring device provided in an embodiment of the utility model;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the battery cell conveying mechanism provided in an embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the main structure of the battery cell conveying mechanism provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the utility model, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0026] In the description of this specification, the term "as an optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one optional embodiment or optional example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] Combination Figures 1 to 4 As shown, the first aspect of the present embodiment provides a battery cell size measuring device, which is arranged on a conveying mechanism 200 of a battery cell 100, and the battery cell size measuring device includes a mounting frame 10, a lifting assembly 20, a battery cell material taking clamp 30 and a detection assembly 40, and the lifting assembly 20, the battery cell material taking clamp 30 and the detection assembly 40 are all arranged on the mounting frame 10, wherein:

[0028] The battery cell picking clamp 30 is used to pick up the battery cell 100 from the conveying mechanism 200, move the picked up battery cell 100 to the detection range of the detection assembly 40, and the battery cell picking clamp 30 is also used to rotate the battery cell 100 by at least 180°; the two sets of detection assemblies 40 are arranged along the axial direction of the battery cell 100 (i.e. Figure 2 The two groups of detection components 40 are arranged in the x-axis direction, and are used to collect the diameter of the battery cell 100 multiple times in the radial direction during the rotation process, and the two groups of detection components 40 are respectively arranged corresponding to the first end and the second end of the battery cell 100. The height value of the battery cell 100 from the first end to the second end can also be detected by the two groups of detection components 40. The first end and the second end are two opposite ends of the battery cell 100 along the axial direction.

[0029] In the prior art, the axial projection of the battery cell is usually used to obtain the diameter of the battery cell, but this method may cause the battery cell to be tilted at an angle or tilted, resulting in a blurred projection area of ​​the battery cell or an error in the edge capture of the battery cell. In this embodiment, the diameter of the battery cell along the radial direction is collected by the detection component, which can avoid the problem of the battery cell being tilted at an angle or tilted, so that the projection area of ​​the battery cell can be more accurately obtained, so as to more accurately obtain the diameter of the battery cell. In addition, in this embodiment, the battery cell is rotated multiple times by the battery cell material clip, and the diameters of multiple different detection areas along the radial direction are obtained during the rotation of the battery cell, rather than being limited to the diameter of a single detection area, which can improve the accuracy of the battery cell diameter detection. In addition, in this embodiment, two groups of detection components are set, and the two groups of detection components are respectively set at the two ends of the battery cell. The height value of the battery cell can be obtained by the two groups of detection components, so as to realize the simultaneous detection of the diameter and height value of the battery cell, which solves the problem of the existing battery cell size measurement device and the single detection parameter. In addition, the battery cell size detection device of this embodiment has low cost and simple operation, which reduces the cost of battery cell size detection.

[0030] Based on the above embodiment, as an optional implementation, the lifting assembly 20 includes a lifting plate 21 and a second driving member 22, the lifting plate 21 is slidably arranged on the mounting frame 10 along the vertical direction, the battery cell picking clamp 30 is arranged on the lifting plate 21, the lifting plate 21 is connected to the second driving member 22, and the second driving member 22 is used to drive the lifting plate 21 along the vertical direction (i.e. Figure 2 The lifting plate 21 can be moved in the y-axis direction in the vertical direction, thereby driving the battery cell picking clamp 30 to move in the vertical direction, so that the battery cell picking clamp 30 can pick up the battery cell 100 from the conveying mechanism 200 and move the picked up battery cell 100 to the detection range of the detection component 40. As an optional embodiment, the lifting plate 21 can be slidably mounted on the mounting frame 10 through a guide rail and a slider, and the second driving member can be a servo motor or a cylinder, and cooperate with a transmission member such as a screw rod, a transmission wheel or a synchronous belt to achieve a transmission connection.

[0031] On the basis of the above embodiment, as an optional implementation, the battery cell picking clamp 30 includes an active roller 31, a third driving member (not shown in the figure) and at least one driven roller (not shown in the figure), the active roller 31 and the driven roller are used to clamp the battery cell 100, and the third driving member can be used to drive the active roller 31 and the driven roller to move closer to or farther away from each other; when the active roller 31 and the driven roller are closer to each other, the active roller 31 and the driven roller clamp the battery cell 100, and when the active roller 31 and the driven roller are farther away from each other, the active roller 31 and the driven roller release the battery cell 100. The third driving member is connected to the active roller 31, and the third driving member is also used to drive the active roller 31 to rotate, and the driven roller follows, so that the battery cell 100 can rotate around its central axis by a preset angle. As an optional embodiment, the number of driven rollers is at least two, so that the battery cell 100 can be clamped more stably, and the battery cell 100 can remain stable during the lifting and lowering of the battery cell 100 in the vertical direction. Therefore, by using the battery cell material clamp 30 including the active roller 31 and the driven roller to clamp the battery cell 100, the battery cell 100 can be rotated by a preset angle, and the surfaces of the active roller 31 and the driven roller are both arc-shaped, which can prevent the surface of the battery cell 100 from being squeezed or deformed, thereby avoiding affecting the diameter detection of the battery cell 100, which is conducive to improving the accuracy of the diameter detection of the battery cell 100. As an optional embodiment, the third driving member can use a servo motor, and cooperate with a transmission member such as a transmission wheel or a synchronous belt to achieve a transmission connection.

[0032] Combination Figure 1 and Figure 3As shown, the battery cell size measuring device also includes a connecting rod 50, which extends along the axial direction of the battery cell 100. Each group of detection components 40 includes a lifting bracket 41 and a CCD detection head 42. The two CCD detection heads 42 are both arranged on the connecting rod 50, one of which is arranged corresponding to the first end of the battery cell 100, and the other CCD detection head 42 is arranged corresponding to the second end of the battery cell 100. Therefore, by arranging the two CCD detection heads 42 respectively corresponding to the two ends of the battery cell 100 in the axial direction, the diameter of the battery cell 100 can be detected, and the height value of the battery cell 100 can be detected by cooperating with the two CCD detection heads 42, so that the diameter and height value of the battery cell 100 can be detected simultaneously. As an optional embodiment, the two lifting brackets 41 are respectively arranged at the two ends of the connecting rod 50, and the two lifting brackets 41 and the connecting rod 50 are slidably connected to make the connecting rod 50 move in the vertical direction. Specifically, sliders are provided at both ends of the connecting rod 50, and the lifting bracket 41 is provided with a slide rail extending in the vertical direction, and the sliding connection between the lifting bracket 41 and the connecting rod 50 is realized through the slider and the slide rail. Therefore, the movement of the connecting rod 50 in the vertical direction can drive the two CCD detection heads 42 to move in the vertical direction, so as to cooperate with the battery cell material taking clamp 30, and detect the diameter and height value of the battery cell 100 at the same time, and the CCD detection head 42 is adjustable in the vertical direction, and can also more accurately obtain the projection area of ​​the battery cell 100, so that the projection area is clearer and the battery cell 100 is more accurately grasped.

[0033] On the basis of the above embodiment, as an optional implementation, the two CCD detection heads 42 can move relative to the connecting rod 50 and can be locked with the connecting rod 50. Specifically, a locking piece can be provided on the two CCD detection heads 42, and the locking piece can move to a locking position along the connecting rod 50, and the locking piece can be locked to the connecting rod 50, thereby limiting the position of the CCD detection head 42, wherein a threaded hole can be provided on the locking piece, and a thread can be provided on the connecting rod 50, and the connecting rod 50 is inserted into the threaded hole to lock the locking piece with the connecting rod 50. Therefore, by setting the two CCD detection heads 42 to move relative to the connecting rod 50, the battery cell size measuring device can be applied to battery cells 100 of different height values, thereby improving the application range of the battery cell size measuring device.

[0034] On the basis of the above embodiment, as an optional implementation, it also includes a light source 43, which is arranged on the lifting plate 21. In the vertical direction, the light source 43 is higher than the two CCD detection heads 42, and the light source 43 is located between the two CCD detection heads 42. The light source 43 is a backlight light source. Therefore, by irradiating the battery cell 100 with the backlight light source, the CCD detection head 42 can obtain the projection of the battery cell 100 along the radial direction, thereby obtaining the diameter of the battery cell 100.

[0035] Based on the above embodiment, as an optional implementation mode, Figure 2 As shown, it also includes a flattening assembly 60, two groups of flattening assemblies 60 are respectively arranged on both sides of the battery cell picking clamp 30, and the two groups of flattening assemblies 60 are relatively arranged at the two ends of the battery cell 100 along the axial direction, one group of flattening assemblies 60 is used to flatten the pole lug at the first end of the battery cell 100, and the other group of flattening assemblies 60 is used to flatten the pole lug at the second end of the battery cell 100. Specifically, each group of flattening assemblies 60 includes a first driving member 61 and a flat plate 62, the flat plate 62 is used to flatten the pole lug at the end (i.e., the first end or the second end) of the battery cell 100, the first driving member 61 is used to drive the flat plate 62 to move along the axial direction of the battery cell 100, so that the flat plate 62 is close to or away from the end of the battery cell 100, and when the flat plate 62 is close to the end of the battery cell 100, the flat plate 62 can flatten the pole lug at the first end or the second end of the battery cell 100. The two pressing plates 62 are relatively arranged at the two ends of the battery cell 100 in the axial direction, and the two first driving members 61 can drive the two pressing plates 62 at the same time, so that one of the pressing plates 62 is close to the first end of the battery cell 100, and the other pressing plate 62 is close to the second end of the battery cell 100, so as to simultaneously flatten the pole ears at the first end and the pole ears at the second end of the battery cell 100. Therefore, by setting the flattening assembly 60 to flatten the pole ears at the ends of the battery cell 100, it is possible to avoid the pole ears at the ends of the battery cell 100 from rebounding and affecting the accuracy of the height value detection of the battery cell 100, thereby improving the accuracy and reliability of the height value detection of the battery cell 100. As an optional embodiment, the first driving member 61 can adopt a servo motor or a cylinder, and cooperate with transmission members such as a screw rod, a transmission wheel or a synchronous belt to achieve a transmission connection.

[0036] On the basis of the above embodiment, as an optional implementation, the pressing plate 62 adopts a transparent pressing plate 62, thereby, the transparent pressing plate is used to flatten the tabs at the first end and the second end of the battery cell 100, so that when the pressing plate 62 flattens the tabs at the ends of the battery cell, the two CCD detection heads 42 can take pictures of the first end and the second end of the battery cell through the transparent pressing plate, thereby detecting the height value of the battery cell 100 from the first end to the second end. The height value of the battery cell 100 can be detected more accurately through the transparent pressing plate 62, avoiding the thickness of the pressing plate 62 itself affecting the accuracy of the height value of the battery cell 100. As an optional implementation, the pressing plate 62 adopts a transparent glass plate.

[0037] Combination Figure 5 and Figure 6As shown, the second aspect of this embodiment provides a battery cell conveying mechanism, which includes the battery cell size measuring device 300 as described in the first aspect, and also includes a conveying mechanism 200, on which a battery cell size detection station is provided, and the battery cell size measuring device 300 is provided at the battery cell size detection station. Specifically, the conveying mechanism 200 includes a conveyor belt carrying the battery cell 100, the conveyor belt is used to convey the battery cell 100, and the surface of the conveyor belt is provided with a plurality of accommodating grooves arranged at intervals along the extension direction of the conveyor belt, and each accommodating groove can accommodate a battery cell 100, and the battery cell size measuring device 300 is mounted on the conveyor belt, and the battery cell 100 conveyed on the conveyor belt can pass through the battery cell size measuring device 300. Therefore, when the battery cell 100 on the conveyor belt is transported to the battery cell size measuring device 300, the battery cell size measuring device 300 can clamp the battery cell 100 and detect the diameter and height values ​​of the battery cell 100. By setting the battery cell size measuring device 300 on the conveying mechanism 200, the battery cell 100 can be continuously transported to the battery cell size measuring device 300 for detection, so that the battery cell size detection process can be better connected with the previous process and the next process, which is beneficial to improving the production efficiency of the battery cell 100.

[0038] Based on the above embodiment, as an optional implementation, the accommodating groove can be set to a V shape to limit the position of the battery cell 100, and prevent the battery cell 100 from rolling randomly on the surface of the conveyor belt due to inertia during the repeated start and stop of the conveyor belt.

[0039] Combine the following Figures 1 to 6 The working principle of the battery cell conveying mechanism in this embodiment is described as follows:

[0040] The conveying mechanism 200 conveys the battery cell 100 to the battery cell size detection station, and the second driving member 22 drives the lifting plate 21 to move in the vertical direction, and the lifting plate 21 drives the battery cell picking clamp 30 to move downward in the vertical direction, so that the battery cell picking clamp 30 clamps the battery cell 100 from the conveying mechanism 200, and then, the lifting plate 21 drives the battery cell picking clamp 30 to move upward in the vertical direction, and lifts the battery cell 100 clamped by the battery cell picking clamp 30 to the detection area of ​​the CCD detection head 42; the battery cell picking clamp 30 drives the battery cell 100 to be detected by the CCD detection head 42. The battery cell 100 rotates. During the rotation of the battery cell 100, the CCD detection head 42 takes pictures for multiple times to measure the diameter of the battery cell 100. The rotation angle during the rotation process is at least 180°. Subsequently, the maximum value and the average value of the diameter of the battery cell 100 are calculated, and the maximum value and the average value of the diameter of the battery cell 100 are compared with the preset diameter value of the battery cell 100 to determine whether the diameter of the battery cell 100 is qualified. If qualified, the height value of the battery cell 100 is continued to be detected. If unqualified, the corresponding battery cell is removed from the conveying mechanism 200. If it is determined that the diameter of the battery cell 100 is qualified, the two first driving members 61 simultaneously drive the two pressing plates 62 so that one of the pressing plates 62 is close to the first end of the battery cell 100 and the other pressing plate 62 is close to the second end of the battery cell 100, and the pole ears at the first end and the pole ears at the second end of the battery cell 100 are flattened at the same time. Subsequently, the two CCD detection heads 42 respectively take photos and detect the first end and the second end of the battery cell 100, calculate the height value of the battery cell 100, compare the height value of the battery cell 100 with the preset height value of the battery cell 100, and determine whether the height value of the battery cell 100 is qualified. If qualified, the conveying mechanism 200 continues to convey the battery cell 100. If unqualified, the corresponding battery cell is removed from the conveying mechanism 200.

[0041] It should be noted that, in this embodiment, the battery cell 100 is a symmetrical structure, and the cross-sectional shape of the battery cell 100 along the radial direction can be elliptical or quasi-circular. When the battery cell 100 rotates along its axial direction, the projection along the radial direction of the battery cell 100 is also different, and then multiple diameters of the battery cell 100 along the radial direction can be obtained. The battery cell 100 is a symmetrical structure, and the angle during the rotation process is set to at least 180°, so that the diameter of the battery cell 100 in different detection areas along the radial direction can be obtained, and the rotation angle of at least 180° means that the sum of the angles of the battery cell 100 during the rotation process is greater than or equal to 180°. In this embodiment, the preset diameter value and the preset height value of the battery cell 100 are not further limited, and those skilled in the art can set them according to actual conditions. In this embodiment, the specific method for judging whether the diameter and height of the battery cell 100 are qualified is not further limited, and those skilled in the art can choose according to actual conditions.

[0042] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A battery cell size measuring device, characterized in that: include: A battery cell picking clamp, which is used to pick up a battery cell and move the picked up battery cell into a detection range of a detection component, and the battery cell picking clamp is also used to rotate the battery cell by at least 180°; The two groups of detection components are arranged along the axial direction of the battery core, and the detection components are used to collect the diameter of the battery core multiple times in the radial direction during the rotation process. The height value of the battery core from the first end to the second end can also be detected by the two groups of detection components. The first end and the second end are the two opposite ends of the battery core along the axial direction.

2. The battery cell size measuring device according to claim 1, characterized in that: It also includes a flattening assembly, two groups of which are respectively arranged on both sides of the battery cell picking clamp, and the two groups of which flatten the tabs at the first end and the second end of the battery cell respectively.

3. The battery cell size measuring device according to claim 2, characterized in that: The flattening assembly includes a first driving member and a flat plate. The flattening plates of the two flattening assemblies are relatively arranged at both ends of the battery cell in the axial direction. The flattening plates are used to flatten the pole ears at the ends of the battery cell. The first driving member is used to drive the flattening plate to move along the axial direction of the battery cell so that the flattening plate is close to or away from the end of the battery cell, and the end refers to the first end or the second end of the battery cell.

4. The battery cell size measuring device according to claim 3, characterized in that: The pressing plate is a transparent pressing plate.

5. The battery cell size measuring device according to claim 1, characterized in that: It also includes a mounting frame and a lifting assembly, the battery cell picking clamp, the detection assembly and the lifting assembly are all arranged on the mounting frame, the lifting assembly includes a lifting plate and a second driving member, the lifting plate is slidably arranged on the mounting frame along the vertical direction, the battery cell picking clamp is arranged on the lifting plate, the lifting plate is connected to the second driving member, and the second driving member is used to drive the lifting plate to drive the battery cell picking clamp to move in the vertical direction.

6. The battery cell size measuring device according to claim 1, characterized in that: The battery cell picking clamp includes an active roller, a third driving member and at least one driven roller, the active roller and the driven roller are used to clamp the battery cell, the third driving member is connected to the active roller, the third driving member is used to drive the active roller and the driven roller to clamp the battery cell, and the third driving member is also used to drive the active roller to rotate and drive the battery cell and the driven roller to rotate.

7. The battery cell size measuring device according to claim 5, characterized in that: It also includes a connecting rod, which extends along the axial direction of the battery cell. Each group of the detection components includes a lifting bracket and a CCD detection head. The two CCD detection heads are both inserted into the connecting rod. The two lifting brackets are respectively arranged at both ends of the connecting rod, and the two lifting brackets are slidably connected to the connecting rod to enable the connecting rod to move in the vertical direction.

8. The battery cell size measuring device according to claim 7, characterized in that: The two CCD detection heads can move relative to the connecting rod and can be locked with the connecting rod.

9. The battery cell size measuring device according to claim 7, characterized in that: It also includes a light source, which is arranged on the lifting plate, located between the two CCD detection heads, and is a backlight source.

10. A battery cell conveying mechanism, characterized in that: It comprises a conveying mechanism and a battery cell size measuring device as described in any one of claims 1 to 9, wherein the battery cell size measuring device is arranged on the conveying mechanism, the conveying mechanism is used to convey the battery cell, and the battery cell size measuring device is used to measure the diameter and height value of the battery cell.

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