Detection tool and detection system for thickness of battery cover plate

Abstract

The utility model relates to the technical field of battery production, in particular to a battery cover plate thickness inspection tool and detection system, which comprises a reference member, a clamping member and an elastic member, a first reference surface is formed at the bottom of the reference member, and a second reference surface and a mounting groove are formed at the first side part of the reference member; the clamping component is detachably installed on the first side portion of the reference component, and an avoiding cavity penetrating through the top of the clamping component and close to the side portion of the reference component is formed in the clamping component. One end of the elastic component is installed on the clamping component, and the other end of the elastic component extends into the avoiding cavity and extends towards the reference component. By utilizing the tool, the cover plate assembly can be quickly clamped, positioned and replaced, the detection efficiency is greatly improved, the personnel investment is reduced, the detection precision is greatly improved due to the uniform tool clamping and positioning, and for the same batch of cover plate assemblies, the shooting focal length of a camera does not need to be repeatedly adjusted, so that the detection efficiency is greatly improved. And the detection efficiency is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a battery cover thickness inspection tool and detection system. Background Art

[0002] At present, for cylindrical batteries, the thickness of the cover plate of its cover plate assembly is an important indicator, which directly affects the structural strength and safety performance of the battery. Therefore, it is necessary to effectively detect the thickness of the cover plate. At present, the image testing system is mainly used to detect the thickness of the cover plate. The image testing system includes a test platform and a camera. The camera is located above the test platform. The cover plate that has been integrated with the lower plastic and the pole, that is, the cover plate assembly, needs to be placed vertically on the test platform when the material is incoming. However, there is currently a lack of tooling that can fix the cover plate assembly vertically. Utility Model Content

[0003] The purpose of the present application is to provide a battery cover thickness inspection tool and detection system, which to a certain extent solves the technical problem in the prior art of the urgent need to develop a tool that can vertically fix the cover assembly to cooperate with a camera test system to complete the thickness detection of the cover.

[0004] The present application provides a battery cover thickness inspection tool, comprising: a reference member, a clamping member and an elastic member; wherein a first reference surface is formed at the bottom of the reference member, and a second reference surface and a mounting groove are formed at the first side of the reference member;

[0005] The clamping member is detachably mounted on the first side of the reference member, and the clamping member is formed with an avoidance cavity that runs through the top and the side near the reference member; one end of the elastic member is mounted on the clamping member, and the other end of the elastic member extends into the avoidance cavity and extends toward the reference member.

[0006] In the above technical solution, further, the clamping member is formed with a positioning protrusion facing the reference member side, the reference member is formed with a positioning groove, and the positioning protrusion is installed in the positioning groove and matched.

[0007] In any of the above technical solutions, further, the number of the positioning protrusions is two and they are arranged at intervals; the number of the positioning grooves is two and they are respectively arranged on both sides of the installation groove; the two positioning protrusions correspond one-to-one to the two positioning grooves.

[0008] In any of the above technical solutions, further, the clamping member and the reference member are connected via a magnet.

[0009] In any of the above technical solutions, further, the positioning protrusion forms a first groove, and the magnet is arranged in the first groove; the inner wall of the positioning groove forms a second groove, and the magnet is arranged in the second groove, and the magnet in the first groove and the magnet in the second groove attract each other.

[0010] In any of the above technical solutions, further, the positioning groove runs through the top, the first side portion and the second side portion perpendicular to the first side portion of the reference member, so that the positioning groove is in a notch shape.

[0011] In any of the above technical solutions, further, the positioning groove has a groove bottom wall and a first groove side wall and a second groove side wall both perpendicular to the groove bottom wall, and the groove bottom wall is parallel to the first reference plane, the first groove side wall is parallel to the second reference plane, and the second groove side wall is perpendicular to the first reference plane.

[0012] In any of the above technical solutions, further, the avoidance cavity runs through the bottom of the clamping member.

[0013] In any of the above technical solutions, further, a side wall of the avoidance cavity opposite to the second reference surface is provided with an assembly groove, and one end of the elastic member is installed in the assembly groove.

[0014] In any of the above technical solutions, further, the clamping member is made of nylon or plastic.

[0015] In any of the above technical solutions, further, the reference component is made of nylon or plastic.

[0016] In any of the above technical solutions, further, the elastic component is a high-strength rubber component, a rubber component, a silicone component or a spring.

[0017] The present application also provides a battery cover thickness detection system, comprising a detection platform, a camera, and a battery cover thickness inspection tool as described in any of the above technical solutions, wherein the camera is arranged above the detection platform, the battery cover thickness inspection tool is used to clamp the cover assembly and is placed between the camera and the detection platform; the first reference surface of the reference component is parallel to the upper surface of the detection platform. Therefore, all the beneficial technical effects of the battery cover thickness inspection tool are not repeated here.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] The battery cover plate thickness inspection tooling provided in the present application can realize rapid clamping, positioning and sample changing operations on the cover plate assembly, greatly improving the inspection efficiency and reducing manpower input. In addition, the unified tooling clamping and positioning greatly improves the inspection accuracy. For the same batch of cover plate assemblies, there is no need to repeatedly adjust the camera's shooting focal length, further improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 An assembly diagram of a battery cover plate thickness inspection tool and a cover plate assembly provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the structure of a reference component provided in an embodiment of the present application;

[0023] Figure 3 Another structural schematic diagram of a reference component provided in an embodiment of the present application;

[0024] Figure 4 A diagram of the transfer of the reference member and the cover plate assembly provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of a clamping member provided in an embodiment of the present application;

[0026] Figure 6 Another structural schematic diagram of a clamping member provided in an embodiment of the present application;

[0027] Figure 7 Another assembly diagram of the battery cover plate thickness inspection tool and the cover plate assembly provided in the embodiment of the present application;

[0028] Figure 8 for Figure 7 Cross-sectional view along section AA;

[0029] Fig. 9 for Figure 7 Cross-sectional view along section BB;

[0030] Fig.10 A schematic diagram of detecting the thickness of a cover sheet in a cover assembly using a battery cover thickness detection system provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 1-reference member, 11-first side portion, 12-second side portion, 13-first reference plane, 14-second reference plane, 15-installation groove, 16-positioning groove, 161-groove bottom wall, 162-first groove side wall, 163-second groove side wall, 17-second groove, 2-clamping member, 21-avoidance cavity, 22-positioning protrusion, 23-first groove, 24-assembly groove, 3-elastic member, 4-magnet, 5-detection platform, 6-camera, 7-cover plate assembly, 71-cover plate, 72-pole, 721-riveting block, 722-rivet. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] The components of the embodiments of the present application generally described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0035] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Refer to the following Figures 1 to 10Describe the inspection tool and detection system for the thickness of the battery cover according to some embodiments of the present application.

[0039] Embodiment 1

[0040] See also Figures 1 to 10 As shown, the embodiment of the present application provides a battery cover thickness inspection tool, comprising: a reference member 1, a clamping member 2 and an elastic member 3; wherein a first reference surface 13 is formed at the bottom of the reference member 1, a second reference surface 14 and a mounting groove 15 are formed at the first side portion 11 of the reference member 1, and when the reference member 1 is placed vertically, the first reference surface 13 is parallel to the horizontal plane, and the second reference surface 14 is parallel to the vertical plane;

[0041] The clamping member 2 is detachably mounted on the first side portion 11 of the reference member 1, and the clamping member 2 is formed with an avoidance cavity 21 that runs through the top thereof and the side portion close to the reference member 1; one end of the elastic member 3 is mounted on the clamping member 2, and the other end of the elastic member 3 extends into the avoidance cavity 21 and extends toward the reference member 1.

[0042] Based on the structure described above, it can be known that when the inspection tool for the thickness of the battery cover provided by the present application is used, the pole 72 of the cover assembly 7 to be tested is installed in the installation groove 15 of the reference member 1, and the cover sheet 71 is parallel to the second reference surface 14 of the reference member 1, and then the clamping member 2 is fixed to the first side 11 of the reference member 1. At this time, the elastic member 3 is against the side of the cover assembly 7 away from the reference member 1, so that the upper surface of the cover sheet 71 can be stably abutted against the second reference surface 14 of the reference member 1, and then the inspection tool for the thickness of the battery cover can be placed on the detection platform 5 together with the cover assembly 7, and the first reference surface 13 is parallel to the upper reference surface of the detection platform 5, that is, the upper surface, and finally the camera 6 above the inspection tool for the thickness of the battery cover is used to shoot the cover sheet 71 below, and the data is transmitted to the computer for processing, and finally the thickness of the cover sheet 71 is obtained. After the inspection is completed, the cover assembly 7 can be removed from the inspection tool for the thickness of the battery cover and replaced with another cover assembly 7 to be inspected. The operation is simple and convenient.

[0043] It can be seen that the battery cover plate thickness inspection tooling provided in the present application can realize rapid clamping, positioning and sample changing operations on the cover plate assembly 7, which greatly improves the inspection efficiency and reduces manpower input. In addition, the unified tooling clamping and positioning greatly improves the inspection accuracy. For the same batch of cover plate assemblies 7, there is no need to repeatedly adjust the shooting focal length of the camera 6, which further improves the inspection efficiency.

[0044] In this embodiment, preferably, Figure 1 , Figures 3 to 6As shown, the clamping member 2 is formed with a positioning protrusion 22 facing the reference member 1 side, the reference member 1 is formed with a positioning groove 16, and the positioning protrusion 22 is installed in the positioning groove 16 and matched.

[0045] According to the structure described above, it can be known that the positioning protrusion 22 and the positioning groove 16 cooperate to achieve the positioning of the clamping member 2, thereby further improving the detection accuracy.

[0046] Furthermore, preferably, the positioning protrusion 22 is a square block with a regular shape, which is convenient for processing and manufacturing as well as subsequent assembly and positioning. Of course, it is not limited to this. The positioning protrusion 22 can also be cylindrical or prismatic, etc., and the specific design is based on actual needs.

[0047] It should be noted that: it is not limited to the above-mentioned positioning structure in which the positioning protrusion 22 and the positioning groove 16 are matched. That is to say, there is no need to design a positioning protrusion 22 on the clamping member 2, but the side of the clamping member 2 close to the reference member 1 is made to be a complete first flush surface and parallel to the second reference surface 14. For the reference member 1, there is no need to open a positioning groove 16 thereon, but the second reference surface 14 of the reference member 1 is made to be a complete second flush surface, so that the first flush surface of the clamping member 2 is directly attached to the second reference surface 14 of the reference member 1.

[0048] In this embodiment, preferably, Figures 3 to 6 As shown, there are two positioning protrusions 22 and they are arranged at intervals; there are two positioning grooves 16 and they are respectively arranged on both sides of the mounting groove 15; the two positioning protrusions 22 correspond to the two positioning grooves 16 one by one, and it can be seen that the distance L2 between the two positioning protrusions 22 is equal to the distance L1 between the two positioning grooves 16.

[0049] According to the structure described above, it can be known that the left and right positioning of the clamping member 2 is further achieved through the cooperation between the two positioning protrusions 22 and the two positioning grooves 16 .

[0050] In this embodiment, preferably, Figure 5 and Figure 6 As shown, the clamping member 2 is U-shaped, and its internal space is the aforementioned avoidance cavity 21, and the structures on both sides of the installation cavity form the aforementioned positioning protrusions 22.

[0051] In this embodiment, preferably, Figure 8 As shown, the clamping member 2 and the reference member 1 are connected via a magnet 4 .

[0052] According to the structure described above, the clamping member 2 and the reference member 1 are attracted and assembled together by the magnet 4, which is a detachable connection method, which is convenient for sample replacement testing, and the magnet 4 has a long service life, low cost, and is easy to purchase.

[0053] Of course, the clamping member 2 and the reference member 1 are not limited to being connected via the magnet 4, and the two can also be detachably connected via a fastening member such as a bolt. For example, a mounting hole is opened on the clamping member 2, and a threaded hole is opened on the first side portion 11 of the reference member 1. The stud of the fastening member such as a bolt passes through the mounting hole and is threaded in the threaded hole, thereby realizing the connection between the clamping member 2 and the reference member 1, and the degree of tightening of the cover assembly 7 can also be adjusted.

[0054] In this embodiment, preferably, Figures 3 to 6 As shown, the positioning protrusion 22 is formed with a first groove 23, and a magnet 4 is arranged in the first groove 23;

[0055] A second groove 17 is formed on the inner wall of the positioning groove 16 , and a magnet 4 is disposed in the second groove 17 . The magnet 4 in the first groove 23 and the magnet 4 in the second groove 17 attract each other.

[0056] According to the structure described above, the magnet 4 in the first groove 23 and the magnet 4 in the second groove 17 are aligned and attracted to each other, thereby achieving the fixation of the clamping member 2 and the reference member 1, and the magnet 4 is installed in the corresponding groove, making the magnet 4 more stable and not easy to fall off.

[0057] Further, preferably, the magnet 4 is a circular block, but is not limited thereto. It may also be a square block or other structures, which are specifically designed according to actual needs and are designed correspondingly to the shapes of the aforementioned first groove 23 and second groove 17 .

[0058] Further, preferably, the depth of the first groove 23 and the second groove 17 are both smaller than the thickness of the magnet 4 .

[0059] It should be noted that the magnet 4 is not limited to being installed on the inner wall of the positioning protrusion 22 and the positioning groove 16, and the magnet 4 can also be installed at other positions where the clamping member 2 contacts the reference member 1, depending on actual needs.

[0060] In this embodiment, preferably, Figure 3 As shown, the positioning groove 16 penetrates the top of the reference member 1 , the first side portion 11 , and the second side portion 12 perpendicular to the first side portion 11 , so that the positioning groove 16 is in a notch shape.

[0061] According to the structure described above, it can be known that the positioning groove 16 has only a groove bottom wall 161, a first groove side wall 162 parallel to the second reference plane 14, and a second groove side wall 163 perpendicular to the second reference plane 14. The first groove side wall 162 and the second groove side wall 163 are both perpendicular to the groove bottom wall 161. It can be seen that the positioning groove 16 is in a notch shape, which is convenient for processing and manufacturing on the one hand, and convenient for assembly and disassembly of the clamping member 2 and the reference member 1 on the other hand.

[0062] Further, preferably, the first groove side wall 162 and the groove bottom wall 161 are respectively provided with the aforementioned second groove 17, and the magnet 4 is installed in any second groove 17. Of course, this is not limited to this, and the aforementioned second groove 17 can be opened only in the first groove side wall 162 or only in the groove bottom wall 161, or the aforementioned second groove 17 can be opened in the first groove side wall 162, the second groove side wall 163 and the groove bottom wall 161, and the magnet 4 is installed in the corresponding second groove 17, and the specific design is based on actual needs.

[0063] Further, preferably, Figure 5 and Figure 6 As shown, the end surface of the positioning protrusion 22 of the clamping member 2 close to the reference member 1 and its bottom surface are formed with a first groove 23, and a magnet 4 is installed in each first groove 23 so as to correspond one-to-one with the two magnets 4 in the positioning groove 16.

[0064] In this embodiment, preferably, Figure 3 As shown, the groove bottom wall 161 is parallel to the first reference plane 13 , the first groove side wall 162 is parallel to the second reference plane 14 , and the second groove side wall 163 is perpendicular to the first reference plane 13 .

[0065] According to the structure described above, the positioning groove 16 is processed by the first reference surface 13 and the second reference surface 14 of the reference component 1, and the mounting protrusion is adapted to the positioning groove 16, so as to further improve the assembly accuracy of the clamping component 2 and the reference component 1, which helps to improve the detection accuracy.

[0066] Of course, the structure is not limited to the above, and the groove bottom wall 161 may form an angle with the first reference plane 13, the first groove side wall 162 may form an angle with the second reference plane 14, and the second groove side wall 163 may be non-vertically arranged with the first reference plane 13, which may be selected according to needs.

[0067] In this embodiment, preferably, Figure 5 As shown, the avoidance cavity 21 runs through the bottom of the clamping member 2, playing the role of avoiding the cover plate assembly 7, and the clamping member 2 uses less material and has low cost. Of course, it is not limited to this. The avoidance cavity 21 may not run through the bottom wall of the clamping member 2, that is, the installation cavity has a bottom wall surface, which is designed according to actual needs.

[0068] In this embodiment, preferably, Figure 3 As shown, the mounting groove 15 runs through the top and the first side portion 11 of the reference component 1, so as to facilitate the assembly of the pole 72 of the cover plate assembly 7 with the mounting groove 15, and the mounting groove 15 with this structure is more convenient to process and manufacture.

[0069] In this embodiment, preferably, Figure 5 As shown, a side wall of the avoidance cavity 21 opposite to the second reference surface 14 is provided with an assembly groove 24 , and one end of the elastic member 3 is installed in the assembly groove 24 .

[0070] According to the structure described above, by opening an assembly groove 24 on the side wall of the avoidance cavity 21 and fixing one end of the elastic member 3 in the assembly groove 24, the elastic member 3 and the clamping member 2 are assembled more stably and firmly and are not easy to fall off.

[0071] Further, preferably, one end of the elastic member 3 is adapted or interference-fitted with the assembly groove 24 .

[0072] In this embodiment, preferably, the material of the clamping member 2 is nylon or plastic, which has sufficient strength and hardness and is light in weight to avoid sinking and displacement due to excessive weight, and is more convenient to take and assemble.

[0073] In this embodiment, preferably, the reference member 1 is made of nylon or plastic, which has sufficient strength and hardness and is lightweight to avoid sinking and displacement due to excessive weight, and is more convenient to pick up and assemble.

[0074] In this embodiment, preferably, the elastic member 3 is made of eutectic, rubber or silicone etc., and preferably, the elastic member 3 is cylindrical or prismatic etc. Of course, not limited to the above, the elastic member 3 can also be a spring, and ensure that its end surface in contact with the cover plate assembly 7 is flat.

[0075] In this embodiment, preferably, the Shore hardness of the elastic member 3 is less than 90 degrees.

[0076] Embodiment 2

[0077] See also Fig.10 As shown, the second embodiment of the present application also provides a battery cover thickness detection system, including the battery cover thickness inspection tooling described in the above-mentioned embodiment one, and thus, has all the beneficial technical effects of the battery cover thickness inspection tooling, and the same technical features and beneficial effects are no longer repeated.

[0078] In this embodiment, preferably, Figure 1 , Figures 7 to 10As shown, the battery cover thickness detection system also includes a detection platform 5 and a camera 6; wherein the camera 6 is arranged above the detection platform 5, and the battery cover thickness inspection tooling is used to clamp the cover assembly 7 and is placed between the camera 6 and the detection platform 5; the first reference plane 13 of the reference member 1 is parallel to the upper reference plane of the detection platform 5, and under normal conditions, the upper reference plane is parallel to the horizontal plane.

[0079] According to the structure described above, the process of using the battery cover thickness detection system to detect the thickness of the cover sheet 71 is as follows:

[0080] First, install the pole 72 of the cover plate assembly 7 to be tested into the installation groove 15 of the reference member 1, and make the cover plate 71 parallel to the second reference surface 14 of the reference member 1, and then fix the clamping member 2 to the first side portion 11 of the reference member 1, at this time, the elastic member 3 presses against the side of the cover plate assembly 7 away from the reference member 1, so that the upper surface of the cover plate 71 can be stably abutted against the second reference surface 14 of the reference member 1;

[0081] Then, the battery cover plate thickness inspection tool and the cover plate assembly 7 can be placed on the inspection platform 5, and the first reference plane 13 is parallel to the upper reference plane, i.e., the upper surface, of the inspection platform 5. Finally, the camera 6 above the battery cover plate thickness inspection tool is used to photograph the cover plate 71 below, and the data is transmitted to the computer for processing, and finally the thickness of the cover plate 71 is obtained;

[0082] After the inspection is completed, the cover plate assembly 7 can be disassembled from the battery cover plate thickness inspection tooling and replaced with another cover plate assembly 7 to be inspected, which is simple and convenient to operate.

[0083] It can be seen that the system can be used to quickly detect the thickness of the cover plate 71 of the cover plate assembly 7, with high detection efficiency and accuracy and less manpower investment.

[0084] Furthermore, preferably, the system also includes the aforementioned computer and other processor structures, etc., and the details can be referred to the two-dimensional imager in the prior art.

[0085] Further, preferably, the pole 72 includes a rivet block 721 and a rivet 722, the rivet block 721 is installed on the outer surface of the cover plate 71, the rivet 722 passes through the lower plastic and the cover plate 71 in sequence from the inner side of the cover plate 71 and the lower plastic, and is riveted to the rivet block 721, and preferably, when the cover plate assembly 7 is placed vertically, the rivet 722 extends in the horizontal direction, the bottom of the rivet block 721 is adapted to the bottom surface of the positioning groove 16, and since the bottom of the rivet block 721 is flat, the bottom surface of the positioning groove 16 is also flat. Of course, it is not limited to this. As the shape of the rivet block 721 changes, the bottom surface of the positioning groove 16 also changes accordingly. When the rivet block 721 is a circular block, the bottom surface of the positioning groove 16 is also a corresponding arc surface.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover thickness inspection tool, characterized in that: include: A reference member, a clamping member and an elastic member; wherein a first reference surface is formed at the bottom of the reference member, and a second reference surface and a mounting groove are formed at the first side of the reference member; The clamping member is detachably mounted on the first side of the reference member, and the clamping member is formed with an avoidance cavity that runs through the top and the side near the reference member; one end of the elastic member is mounted on the clamping member, and the other end of the elastic member extends into the avoidance cavity and extends toward the reference member.

2. The battery cover thickness inspection tool according to claim 1, characterized in that: The clamping member is formed with a positioning protrusion facing the reference member side, the reference member is formed with a positioning groove, and the positioning protrusion is installed in the positioning groove and matched.

3. The battery cover thickness inspection tool according to claim 2, characterized in that: The number of the positioning protrusions is two and they are arranged at intervals; the number of the positioning grooves is two and they are respectively arranged on both sides of the installation groove; the two positioning protrusions correspond to the two positioning grooves one by one.

4. The battery cover thickness inspection tool according to claim 2, characterized in that: The clamping member is connected to the reference member via a magnet.

5. The battery cover thickness inspection tool according to claim 4, characterized in that: The positioning protrusion forms a first groove, and the magnet is arranged in the first groove; the inner wall of the positioning groove forms a second groove, and the magnet is arranged in the second groove, and the magnet in the first groove and the magnet in the second groove attract each other.

6. The battery cover thickness inspection tool according to claim 2, characterized in that: The positioning groove passes through the top, the first side portion and the second side portion perpendicular to the first side portion of the reference component, so that the positioning groove is in a notch shape.

7. The battery cover thickness inspection tool according to claim 6, characterized in that: The positioning groove has a groove bottom wall and a first groove side wall and a second groove side wall both perpendicular to the groove bottom wall, and the groove bottom wall is parallel to the first reference plane, the first groove side wall is parallel to the second reference plane, and the second groove side wall is perpendicular to the first reference plane.

8. The battery cover thickness inspection tool according to claim 1, characterized in that: The avoidance cavity runs through the bottom of the clamping member; and / or A side wall of the avoidance cavity opposite to the second reference surface is provided with an assembly groove, and one end of the elastic component is installed in the assembly groove.

9. The battery cover thickness inspection tool according to claim 1, characterized in that: The material of the clamping member is nylon or plastic; and / or The material of the reference member is nylon or plastic; and / or The elastic component is a high-strength rubber component, a rubber component, a silicone component or a spring.

10. A battery cover thickness detection system, characterized in that: It comprises a detection platform, a camera and a battery cover thickness inspection tool as described in any one of claims 1 to 9; wherein the camera is arranged above the detection platform, and the battery cover thickness inspection tool is used to clamp the cover assembly and is placed between the camera and the detection platform; the first reference plane of the reference member is parallel to the upper reference plane of the detection platform.

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