Automatic thickness measuring device for lithium battery

Abstract

The utility model belongs to the technical field of lithium battery production, and particularly discloses an automatic thickness measuring device for a lithium battery, which comprises a detection frame, a horizontal moving platform and a battery cell detection table, the detection frame is provided with a laser thickness gauge; the laser thickness gauge comprises a first laser displacement sensor and a second laser displacement sensor; the horizontal moving platform is used for driving the detection frame to move along the X axis and the Y axis. The laser thickness gauge is arranged on the detection frame, and the horizontal moving platform can drive the detection frame to move along the X axis and the Y axis, so that the laser thickness gauge can accurately move to a position where a battery cell to be subjected to thickness measurement is sealed on the battery cell detection table, and thickness detection can be automatically carried out; and the thickness measuring device judges whether the current battery cell thickness reaches the standard or not according to the thickness data so as to remind a worker to pick out defective products, so that the qualification rate of the shipment products can be effectively improved, the conditions that the lithium battery products are in batch failure and the defective products are mixed into the shipment products are avoided, the manual allocation is effectively reduced, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to an automatic thickness measuring device for lithium batteries. Background Technology

[0002] Currently, lithium battery production requires a secondary sealing process, which is the final sealing step in lithium battery production. After the lithium batteries are sealed using a secondary sealing machine, the finished lithium batteries are directly collected. Subsequently, the seal thickness is measured manually using a handheld pointer-type dial indicator. However, due to the large quantity, manual measurement is performed on the first piece, with random checks every two hours. Changes in temperature, pressure, and parallelism during the inspection process can lead to poor seal thickness. It is impossible to monitor the sealing effect of all lithium batteries in real time, and it is also impossible to effectively identify defective products. This can result in batches of defective products being mixed into the shipped products. In addition, manual measurement requires a large number of quality personnel, resulting in high labor costs. Utility Model Content

[0003] The purpose of this invention is to provide an automatic thickness measuring device for lithium batteries, in order to solve the technical problem that existing technologies often result in batch defects in lithium battery products, with defective products being mixed into shipped products.

[0004] To achieve the above objectives, this utility model provides an automatic thickness measurement device for lithium batteries, comprising: a detection frame, a horizontal moving platform, and a cell detection table; the upper side of the cell detection table is provided with a support surface for supporting the cell; the detection frame is disposed on the horizontal moving platform and located on one side of the cell detection table, and the detection frame is equipped with a laser thickness gauge; the laser thickness gauge includes a first laser displacement sensor and a second laser displacement sensor; the first laser displacement sensor is located directly above the second laser displacement sensor; there is a receiving space between the first laser displacement sensor and the second laser displacement sensor for accommodating the cell; the horizontal moving platform is used to drive the detection frame to move along the X-axis and Y-axis, so that the cell supported by the cell detection table is located within the receiving space.

[0005] Preferably, the horizontal moving platform includes an X-axis linear drive module and a Y-axis linear drive module; the X-axis linear drive module has an X-axis moving stage for moving along the X-axis, and the Y-axis linear drive module is disposed on the X-axis moving stage; the Y-axis linear drive module has a Y-axis moving stage for moving along the Y-axis, and the detection frame is disposed on the Y-axis moving stage.

[0006] Preferably, the detection frame includes a fixed frame, a lifting platform, and a height adjustment mechanism; the fixed frame is provided with a vertically arranged lifting rail, the lifting platform is slidably connected to the lifting rail, and the first laser displacement sensor and the second laser displacement sensor are both disposed on the lifting platform; the fixed frame is connected to the Y-axis moving stage, and the height adjustment mechanism is disposed on the lifting platform or the fixed frame, the height adjustment mechanism being used to adjust the height of the lifting platform.

[0007] Preferably, the height adjustment mechanism is disposed on the lifting platform, and the height adjustment mechanism includes an adjustment seat and an adjustment screw; the adjustment screw is vertically disposed, the adjustment seat is disposed at the upper end of the lifting platform, and the adjustment seat is provided with a vertically oriented threaded hole; the middle part of the adjustment screw is threadedly connected to the threaded hole, and the lower end of the adjustment screw abuts against the fixed frame.

[0008] Preferably, the upper end of the adjusting screw is provided with a gripping part.

[0009] Preferably, the lower end of the adjusting screw is provided with an arc surface for abutting against the fixing frame.

[0010] Preferably, it further includes: a fixed platform and a testing platform driving mechanism; the horizontal moving platform and the testing platform driving mechanism are both disposed on the upper surface of the fixed platform, the testing platform driving mechanism has a transport block that moves along the X-axis, and the cell testing platform is disposed on the transport block.

[0011] Preferably, the cell testing station includes multiple support members; each support member has a support rod and a support portion, the support portion is disposed at the upper end of the support rod, the lower end of the support rod is connected to the transport block, and the upper surfaces of the multiple support portions form the support surface for supporting the cell.

[0012] Preferably, the transport block is provided with multiple mounting holes, and the lower end of the support rod extends into the mounting holes.

[0013] Preferably, the lifting platform is provided with a first connecting rod and a second connecting rod extending in a horizontal direction, the first connecting rod being located above the second connecting rod, the first laser displacement sensor being disposed on the first connecting rod, and the second laser displacement sensor being disposed on the second connecting rod.

[0014] The automatic thickness measurement device for lithium batteries provided by this utility model has the following advantages: A laser thickness gauge is mounted on a testing frame, and a horizontal moving platform can drive the testing frame to move along the X and Y axes. This allows the first and second laser displacement sensors of the laser thickness gauge to be accurately moved to the sealing position of the battery cell to be measured on the cell testing platform. Once the first and second laser displacement sensors are in position, the laser thickness gauge is activated, and the horizontal moving platform drives the laser thickness gauge to move from one end to the other along the extension direction of the sealing position of the battery cell, thus completely detecting the sealing thickness data of the entire battery cell. This completes the second sealing process for the battery cell. After being placed on the cell testing platform, the automatic thickness measuring device for lithium batteries will automatically detect the seal thickness of the cells and determine whether the current cell thickness meets the standard based on the thickness data. If it does not meet the standard, an alarm will be issued to remind workers to pick out defective products. Therefore, the automatic thickness detection process can be carried out on cells after the second sealing process, and real-time feedback and early warning can be given based on the compliance status of the cells. This effectively improves the pass rate of shipped products and prevents the occurrence of batch defects in lithium battery products or defective products mixed into the shipped products. Moreover, it can reduce the process of manually measuring the seal thickness with a handheld pointer micrometer, effectively reducing manpower and labor costs.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the automatic thickness measuring device for lithium batteries according to an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 This is a schematic diagram of the structure of the automatic thickness measuring device for lithium batteries in an embodiment of this utility model when it does not support the battery cell.

[0019] In the diagram, 100 is the inspection frame; 110 is the laser thickness gauge; 111 is the first laser displacement sensor; 112 is the second laser displacement sensor; 113 is the accommodating space; 120 is the fixed frame; 130 is the lifting platform; 131 is the first connecting rod; 132 is the second connecting rod; 140 is the height adjustment mechanism; 141 is the adjustment seat; 142 is the adjustment screw; 143 is the gripping part; 144 is the arc surface; 200 is the horizontal moving platform; 210 is the X-axis linear drive module; 211 is the X-axis moving stage; 220 is the Y-axis linear drive module; 221 is the Y-axis moving stage; 300 is the battery cell inspection platform; 310 is the support surface; 320 is the support component; 321 is the support rod; 322 is the support part; 400 is the fixed platform; 500 is the inspection platform drive mechanism; 510 is the transport block; 511 is the mounting hole; and 600 is the battery cell. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Please refer to the following: Figures 1 to 3 The present invention will now describe an automatic thickness measuring device for lithium batteries provided in an embodiment of the present invention.

[0025] Reference Figures 1 to 3 An automatic thickness measurement device for lithium batteries according to an embodiment of the present invention includes: a detection frame 100, a horizontal moving platform 200, and a cell detection table 300; the upper side of the cell detection table 300 is provided with a support surface 310 for supporting a cell 600; the detection frame 100 is disposed on the horizontal moving platform 200 and is located on one side of the cell detection table 300; the detection frame 100 is provided with a laser thickness gauge 110; the laser thickness gauge 110 includes a first laser displacement sensor 111 and a second laser displacement sensor 112; the first laser displacement sensor 111 is located directly above the second laser displacement sensor 112; there is a receiving space 113 between the first laser displacement sensor 111 and the second laser displacement sensor 112 for accommodating the cell 600; the horizontal moving platform 200 is used to drive the detection frame 100 to move along the X-axis and Y-axis, so that the cell 600 supported by the cell detection table 300 is located within the receiving space 113. It should be noted that the X-axis and Y-axis intersect, and ideally, they are perpendicular to each other for better control of the movement of the inspection frame 100. Furthermore, the angle between the X-axis and Y-axis can be less than 90 degrees to accommodate various inspection conditions.

[0026] The cell testing platform 300 is used to support the cell 600. The laser thickness gauge 110 uses the laser displacement sensor 111 and the laser displacement sensor 112 to conduct laser beams. The accommodating space 113 is the beam-contrast area of ​​the first laser displacement sensor 111 and the second laser displacement sensor 112. When the cell 600 is placed in the accommodating space 113, the laser thickness gauge 110 calculates the thickness of the cell 600 by measuring the distance between the upper and lower surfaces of the cell 600 using laser beams.

[0027] The horizontal moving platform 200 is used to move the inspection frame 100 to adjust the position of the laser thickness gauge 110, so that the first laser displacement sensor 111 is located above the battery cell supported by the battery cell inspection table 300, and the second laser displacement sensor 112 is located below the battery cell. This ensures that the battery cell 600 is located within the receiving space 113, and the laser thickness gauge 110 can directly measure the thickness of the battery cell at its current position. It is understood that the thickness data measured by the laser thickness gauge 110 can be directly sent to the PLC controller for collection. The controller then determines whether the current thickness of the battery cell meets the standard based on the collected data. If the thickness meets the standard, no audible or visual warning is issued; if it does not meet the standard, an audible and visual alarm is issued so that workers can remove defective products.

[0028] In operation, the battery cell 600, after undergoing the second sealing process, is placed on the support surface 310 of the battery cell testing platform 300, with the testing position of the battery cell suspended in the air. Then, the horizontal moving platform 200 drives the testing frame 100 to move along the Y-axis, so that the first laser displacement sensor 111 and the second laser displacement sensor 112 reach one end of the sealing position of the battery cell 600. At this point, the laser thickness gauge 110 is activated to detect the current thickness of the battery cell. Finally, the horizontal moving platform 200 drives the testing frame 100 to move along the X-axis, allowing the laser thickness gauge 110 to move from one end to the other along the extension direction of the sealing position of the battery cell. The laser thickness gauge 110 can then acquire the sealing thickness data of the battery cell 600 after the second sealing process. The laser thickness gauge 110 feeds the thickness data back to the controller, which compares the thickness data with a preset thickness. If the thickness meets the standard, no audible or visual warning is issued; if it does not meet the standard, an audible and visual alarm is issued so that workers can remove defective products.

[0029] In this embodiment, the laser thickness gauge 110 of the automatic thickness measurement device for lithium batteries is mounted on the inspection frame 100. The horizontal moving platform 200 drives the inspection frame 100 to move along the X and Y axes. This allows the first laser displacement sensor 111 and the second laser displacement sensor 112 of the laser thickness gauge 110 to accurately move to the sealing position of the battery cell to be measured on the cell inspection platform 300. Once the first laser displacement sensor 111 and the second laser displacement sensor 112 are in position, the laser thickness gauge 110 is activated. The horizontal moving platform 200 then drives the laser thickness gauge 110 to move from one end to the other along the extension direction of the sealing position of the battery cell, thus completing the inspection of the entire battery cell. The sealing thickness data of each battery cell is obtained by placing the battery cell 600, after the second sealing process, on the battery cell testing platform 300. The automatic thickness measuring device for lithium batteries will automatically detect the sealing thickness of the battery cell and determine whether the current battery cell thickness meets the standard based on the thickness data. If it does not meet the standard, an alarm will be issued to remind workers to pick out defective products. Therefore, the battery cell thickness can be automatically detected after the second sealing process, and real-time feedback and early warning can be given based on the battery cell's compliance status. This effectively improves the pass rate of shipped products and ensures the qualified rate of shipments. Moreover, it can reduce the process of manually measuring the sealing thickness with a handheld pointer micrometer, effectively reducing manpower and labor costs.

[0030] In some embodiments of this utility model, reference is made to Figures 1 to 3The horizontal moving platform 200 includes an X-axis linear drive module 210 and a Y-axis linear drive module 220. The X-axis linear drive module 210 has an X-axis moving stage 211 for moving along the X-axis, and the Y-axis linear drive module 220 is mounted on the X-axis moving stage 211. The Y-axis linear drive module 220 has a Y-axis moving stage 221 for moving along the Y-axis, and the inspection frame 100 is mounted on the Y-axis moving stage 221. That is, the X-axis linear drive module 210 can drive the Y-axis linear drive module 220 and the inspection frame 100 to move along the X-axis, and the Y-axis linear drive module 220 can drive the inspection frame 100 to move along the Y-axis, thereby realizing the function of the horizontal moving platform 200 driving the inspection frame 100 to move along the X-axis and Y-axis. In addition, in some specific embodiments, the X-axis linear drive module 210 is mounted on the Y-axis moving stage 221, and the inspection frame 100 is mounted on the X-axis moving stage 211 to enable the inspection frame 100 to move on the X-axis and Y-axis.

[0031] It should be noted that the X-axis linear drive module 210 and the Y-axis linear drive module 220 can be motor-driven lead screw linear modules to drive the X-axis moving stage 211 to move linearly along the X-axis and the Y-axis moving stage 221 to move linearly along the Y-axis. Alternatively, the X-axis linear drive module 210 and the Y-axis linear drive module 220 can also be linear drive modules such as hydraulic cylinders or pneumatic cylinders.

[0032] In some embodiments of this utility model, reference is made to Figures 1 to 3 The testing frame 100 includes a fixed frame 120, a lifting platform 130, and a height adjustment mechanism 140. The fixed frame 120 is provided with a vertically arranged lifting rail, and the lifting platform 130 is slidably connected to the lifting rail. The first laser displacement sensor 111 and the second laser displacement sensor 112 are both mounted on the lifting platform 130. The fixed frame 120 is connected to the Y-axis moving stage 221. The height adjustment mechanism 140 is mounted on the lifting platform 130 or the fixed frame 120 and is used to adjust the height of the lifting platform 130. The lifting platform 130 can move up and down along the lifting rail. The height adjustment mechanism 140 can adjust the height of the lifting platform 130, thus simultaneously adjusting the height of the first laser displacement sensor 111 and the second laser displacement sensor 112, so that the first laser displacement sensor 111 and the second laser displacement sensor 112 are aligned with the cell detection positions at different heights, facilitating the detection of the cell's seal thickness.

[0033] In some embodiments of this utility model, reference is made to Figures 1 to 3The height adjustment mechanism 140 is mounted on the lifting platform 130. The height adjustment mechanism 140 includes an adjustment seat 141 and an adjustment screw 142. The adjustment screw 142 is vertically positioned, and the adjustment seat 141 is located at the upper end of the lifting platform 130. The adjustment seat 141 has a vertically oriented threaded hole. The middle part of the adjustment screw 142 is threadedly connected to the threaded hole, and the lower end of the adjustment screw 142 abuts against the fixed frame 120. Since the lower end of the adjustment screw 142 abuts against the fixed frame 120, rotating the adjustment screw 142 drives the adjustment seat 141 to move up and down, thereby moving the lifting platform 130 up and down and adjusting the height of the lifting platform 130. When the adjustment screw 142 is not rotated, the lifting platform 130 will not continue to rise or fall, remaining at its current position so that the laser thickness gauge 110 can perform thickness detection on the battery cell at the same height.

[0034] In some embodiments of this utility model, reference is made to Figures 1 to 3 The upper end of the adjusting screw 142 is provided with a gripping part 143. The gripping part 143 allows the operator to easily grip the adjusting screw 142 to adjust the height of the lifting platform 130 by rotating the adjusting screw 142, which is convenient for operation.

[0035] In some embodiments of this utility model, reference is made to Figures 1 to 3 In order to reduce the friction between the adjusting screw 142 and the fixed frame 120, the lower end of the adjusting screw 142 is provided with an arc surface 144 for abutting against the fixed frame 120. This reduces the contact area between the adjusting screw 142 and the fixed frame 120, reduces friction, and makes it easier for the operator to rotate the adjusting screw 142.

[0036] In addition, the height adjustment mechanism 140 can also be installed on the fixed frame 120. The height adjustment mechanism 140 can be replaced by a cylinder, hydraulic cylinder, etc., so as to drive the lifting platform 130 to rise and fall in the vertical direction, thereby achieving the purpose of adjusting the height of the lifting platform 130.

[0037] Reference Figures 1 to 3In some embodiments of this utility model, the automatic thickness measuring device for lithium batteries further includes: a fixed platform 400 and a detection platform driving mechanism 500; the horizontal moving platform 200 and the detection platform driving mechanism 500 are both disposed on the upper surface of the fixed platform 400, the detection platform driving mechanism 500 has a transport block 510 that moves along the X-axis, and the cell detection platform 300 is disposed on the transport block 510. That is, the cell detection platform 300 can also move along the X-axis. In use, the cell detection platform 300 can move along the X-axis to the cell 600 loading / unloading position under the drive of the detection platform driving mechanism 500. After the cell 600 is placed on the cell detection platform 300, the detection platform driving mechanism 500 drives the cell detection platform 300 and the cell 600 to move along the X-axis to the position to be measured, so as to wait for the laser thickness gauge 110 to detect the cell. It should be noted that the detection platform driving mechanism 500 can be a cylinder, a linear drive module, a hydraulic cylinder, or other driving device.

[0038] In some embodiments of this utility model, reference is made to Figures 1 to 3 The cell testing station 300 includes multiple support members 320. Each support member 320 has a support rod 321 and a support portion 322. The support portion 322 is disposed at the upper end of the support rod 321, and the lower end of the support rod 321 is connected to the transport block 510. The upper surfaces of the multiple support portions 322 form the support surface 310 for supporting the cell 600. That is, the cell testing station 300 is composed of multiple support members 320. The number of support members 320 can be selected according to the length of the cell to be tested. In this embodiment, two support members 320 can be used to support the cell. Alternatively, depending on the size of the cell, one or more support members 320 can be used to support the cell.

[0039] In some embodiments of this utility model, reference is made to Figures 1 to 3 To facilitate the installation of the support member 320 on the transport block 510, the transport block 510 is provided with multiple mounting holes 511, and the lower end of the support rod 321 extends into the mounting hole 511. The outer diameter of the support rod 321 is adapted to the inner diameter of the mounting hole 511, allowing the support rod 321 to be fixed after it is inserted into the mounting hole 511, ensuring that the support part 322 will not shake arbitrarily, ensuring that the battery cell will not shake arbitrarily during testing, and ensuring more accurate thickness data.

[0040] In some embodiments of this utility model, reference is made to Figures 1 to 3The lifting platform 130 is provided with a first connecting rod 131 and a second connecting rod 132. The first connecting rod 131 is located above the second connecting rod 132. The first laser displacement sensor 111 is disposed on the first connecting rod 131, and the second laser displacement sensor 112 is disposed on the second connecting rod 132. The extension directions of the first connecting rod 131 and the second connecting rod 132 are parallel and parallel to the horizontal plane, so that there is enough space between the first connecting rod 131 and the second connecting rod 132 for the battery cell to pass through, and to avoid the first connecting rod 131 and the second connecting rod 132 colliding with the battery cell during use.

[0041] In summary, during use, the cell testing platform 300 can move along the X-axis to the cell 600 loading / unloading position under the drive of the testing platform drive mechanism 500. After the cell 600 is placed on the cell testing platform 300, the testing platform drive mechanism 500 drives the cell testing platform 300 and the cell to move along the X-axis to the position to be measured for thickness, so that the laser thickness gauge 110 can test the cell. Subsequently, the horizontal moving platform 200 drives the testing frame 100 to move along the Y-axis so that the first laser displacement sensor 111 and the second laser displacement sensor 112 reach one end of the cell's sealing position. At this time, the laser thickness gauge 110 is activated so that it can test the current cell thickness. Finally, the horizontal moving platform 200 drives the testing frame 100 to move along the X-axis so that the laser thickness gauge 110 can move from one end to the other along the extension direction of the cell's sealing position. The laser thickness gauge 110 can then obtain the sealing thickness data of the cell after the second sealing process. The laser thickness gauge 110 feeds back the thickness data to the controller, which compares the thickness data with the preset thickness. If the thickness meets the standard, no audible or visual warning is issued; if it does not meet the standard, an audible and visual alarm is issued so that workers can remove defective products. After the thickness data is detected, the cell inspection station 300 can return from the position to be measured to the cell loading / unloading position under the drive of the inspection station drive mechanism 500, facilitating cell loading and unloading.

[0042] The automatic thickness measurement device for lithium batteries in this embodiment has at least the following beneficial effects: The laser thickness gauge 110 is mounted on the inspection frame 100, and the horizontal moving platform 200 can drive the inspection frame 100 to move along the X and Y axes. Therefore, the first laser displacement sensor 111 and the second laser displacement sensor 112 of the laser thickness gauge 110 can be accurately moved to the sealing position of the battery cell to be measured on the cell inspection station 300. When the first laser displacement sensor 111 and the second laser displacement sensor 112 are in position, the laser thickness gauge 110 is activated, and the horizontal moving platform 200 drives the laser thickness gauge 110 to move from one end to the other along the extension direction of the sealing position of the battery cell. By fully testing the sealing thickness data of the entire battery cell, after the battery cell completes the second sealing process, it is placed on the battery cell testing platform 300. The automatic thickness measuring device for lithium batteries will automatically detect the sealing thickness of the battery cell and determine whether the current battery cell thickness meets the standard based on the thickness data. If it does not meet the standard, an alarm can be issued to remind workers to pick out defective products. Therefore, the battery cell after the second sealing process can be automatically tested for thickness, and real-time feedback and early warning can be given based on the battery cell's compliance status. This effectively improves the pass rate of shipped products and ensures the qualified rate of shipments. Moreover, it can reduce the process of manually measuring the sealing thickness with a handheld pointer micrometer, effectively reducing manpower and labor costs.

[0043] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. An automatic thickness measuring device for lithium batteries, characterized in that, include: The system comprises a testing frame, a horizontal moving platform, and a cell testing station. The upper side of the cell testing station has a support surface for supporting the cell. The testing frame is mounted on the horizontal moving platform and located on one side of the cell testing station. The testing frame is equipped with a laser thickness gauge. The laser thickness gauge includes a first laser displacement sensor and a second laser displacement sensor. The first laser displacement sensor is located directly above the second laser displacement sensor. A receiving space for accommodating the cell exists between the first and second laser displacement sensors. The horizontal moving platform drives the testing frame to move along the X and Y axes, so that the cell supported by the cell testing station is located within the receiving space.

2. The automatic thickness measuring device for lithium batteries according to claim 1, characterized in that, The horizontal moving platform includes an X-axis linear drive module and a Y-axis linear drive module; The X-axis linear drive module has an X-axis moving stage for moving along the X-axis, and the Y-axis linear drive module is disposed on the X-axis moving stage. The Y-axis linear drive module has a Y-axis moving stage for moving along the Y-axis, and the detection frame is mounted on the Y-axis moving stage.

3. The automatic thickness measuring device for lithium batteries according to claim 2, characterized in that, The detection frame includes a fixed frame, a lifting platform, and a height adjustment mechanism; the fixed frame is provided with a vertically arranged lifting rail, the lifting platform is slidably connected to the lifting rail, and the first laser displacement sensor and the second laser displacement sensor are both disposed on the lifting platform; the fixed frame is connected to the Y-axis moving stage, and the height adjustment mechanism is disposed on the lifting platform or the fixed frame, and the height adjustment mechanism is used to adjust the height of the lifting platform.

4. The automatic thickness measuring device for lithium batteries according to claim 3, characterized in that, The height adjustment mechanism is installed on the lifting platform. The height adjustment mechanism includes an adjustment seat and an adjustment screw. The adjustment screw is vertically arranged, and the adjustment seat is located at the upper end of the lifting platform. The adjustment seat is provided with a vertically oriented threaded hole. The middle part of the adjustment screw is threadedly connected to the threaded hole, and the lower end of the adjustment screw abuts against the fixed frame.

5. The automatic thickness measuring device for lithium batteries according to claim 4, characterized in that, The upper end of the adjusting screw is provided with a gripping part.

6. The automatic thickness measuring device for lithium batteries according to claim 4, characterized in that, The lower end of the adjusting screw is provided with an arc surface for abutting against the fixing frame.

7. The automatic thickness measuring device for lithium batteries according to claim 1, characterized in that, Also includes: A fixed platform and a testing platform driving mechanism; the horizontal moving platform and the testing platform driving mechanism are both disposed on the upper surface of the fixed platform, the testing platform driving mechanism has a transport block that moves along the X-axis, and the battery cell testing platform is disposed on the transport block.

8. The automatic thickness measuring device for lithium batteries according to claim 7, characterized in that, The cell testing station includes multiple support members; each support member has a support rod and a support portion, the support portion is disposed at the upper end of the support rod, the lower end of the support rod is connected to the transport block, and the upper surfaces of the multiple support portions form the support surface for supporting the cell.

9. The automatic thickness measuring device for lithium batteries according to claim 8, characterized in that, The transport block is provided with multiple mounting holes, and the lower end of the support rod extends into the mounting holes.

10. The automatic thickness measuring device for lithium batteries according to claim 3, characterized in that, The lifting platform is provided with a first connecting rod and a second connecting rod extending in a horizontal direction. The first connecting rod is located above the second connecting rod. The first laser displacement sensor is installed on the first connecting rod, and the second laser displacement sensor is installed on the second connecting rod.

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