Device for detecting packaging thickness of aluminum-plastic film of battery cell

Abstract

The invention discloses a device for detecting the packaging thickness of an aluminum plastic film of a battery cell, and relates to the field of battery cell production and detection. The detection device for the packaging thickness of the aluminum-plastic film of the battery cell comprises a base on which a mounting plate is fixedly mounted, and further comprises sliding boxes which are symmetrically and fixedly connected to the base, sliding blocks are slidably connected to the interiors of the sliding boxes, and connecting rods are fixedly connected to the sliding blocks; the booster pump is matched with the sliding box, so that the fixing plate clamps the battery cell, the pressure release valve stabilizes the pressure to prevent the battery cell from being damaged, and the detection accuracy is guaranteed; supercharged excess gas forms an airflow curtain wall and a dustproof light stabilizing path through a pressure relief pipe, environmental interference is eliminated, interference of environmental factors on detection results is effectively avoided, the accuracy of detection data is further improved, meanwhile, pressure relief airflow drives an impeller to drive a lead screw, a sensor reciprocates, errors are reduced through multiple times of measurement, precision is improved through continuous scanning, and the detection accuracy is improved. And the fine change of the thickness of the aluminum-plastic film can be accurately captured.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery cell production detection, and in particular relates to a device for detecting the thickness of aluminum-plastic film packaging of a battery cell. Background Art

[0002] As the core component of lithium batteries, battery cells are widely used in new energy vehicles, 3C products and other fields. Their performance directly affects the battery life and safety of the equipment.

[0003] As a packaging material for battery cells, aluminum-plastic film combines barrier properties, flexibility and corrosion resistance. Its packaging thickness is a key parameter that determines the performance of the battery cells. If the thickness is too thin, it may easily cause safety hazards such as leakage and short circuit. If the thickness is too thick, it will increase the weight and volume of the battery cells and reduce the energy density. Therefore, accurately detecting the thickness of the aluminum-plastic film packaging is crucial to ensuring the quality and stability of the battery cells.

[0004] Currently, the thickness of the aluminum-plastic film packaging of battery cells is mostly detected by manual caliper measurement or traditional laser scanning equipment. Manual measurement is extremely inefficient and is affected by the operator's experience and technique, resulting in large measurement errors, making it difficult to meet the needs of large-scale production. Although traditional automated equipment can achieve batch detection, it is easily disturbed by environmental dust during the detection process, resulting in optical path deviation or data fluctuation. In addition, existing equipment mostly uses single-point single-time measurement, which cannot fully scan the aluminum-plastic film and has difficulty capturing subtle changes in thickness, resulting in insufficient detection accuracy and stability. In view of this, the present invention is specially proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a device for detecting the thickness of the aluminum-plastic film package of a battery cell that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] , The cam is connected to the sliding box by a plurality of push-pull means and the push-pull means is connected to the sliding box by a plurality of push-pull means. The push-pull means is connected to the sliding box by a plurality of push-pull means. The push-pull means is connected to the sliding box by a plurality of push-pull means.

[0008] Preferably, the boosting component includes a boosting pump and an air pipe. The boosting pump is fixedly mounted on the mounting plate. One end of the air pipe is connected to the output end of the boosting pump and the other end is connected to the sliding box. A one-way valve is provided on the air pipe.

[0009] Preferably, the sliding box is fixedly connected to an exhaust pipe, and the exhaust pipe is provided with a solenoid valve.

[0010] In order to enable the fixed plate to automatically reset under the elastic potential energy of the spring, a spring is further provided in the sliding box. The spring is sleeved on the connecting rod. One end of the spring is fixedly connected to the slider, and the other end is fixedly connected to the inner wall of the sliding box.

[0011] Preferably, a screw is rotatably connected to the mounting plate, a guide rod 2 is fixedly connected to the mounting plate, the movable seat is slidably connected to the guide rod 2, and is threadedly connected to the screw. When the screw rotates, it can drive the movable seat to drive the sliding seat and the laser ranging sensor to move along the guide rod 2.

[0012] In order to drive the screw to rotate, a driving handle is further included, and the driving handle is fixedly installed on one end of the screw.

[0013] In order to improve the stability of the sliding seat during sliding, the guide mechanism further includes a guide rod 1, one end of the guide rod 1 is fixedly connected to the moving seat, and the sliding seat is slidably connected to the guide rod 1.

[0014] In order to drive the sliding seat to drive the laser ranging sensor to move along the guide rod, further, a reciprocating screw is rotatably connected to the moving seat, the sliding seat is threadedly connected to the reciprocating screw, the pressure relief pipe is fixedly connected to the moving seat, and an impeller is fixedly installed on one end of the reciprocating screw that passes through the pressure relief pipe.

[0015] In order to facilitate the disassembly and assembly of the laser ranging sensor, preferably, it further includes a plurality of fixing bolts, and the laser ranging sensor is disassembled and connected to the sliding seat through the plurality of fixing bolts.

[0016] In order to improve the stability of the battery core clamped and fixed between the two fixing plates, preferably, a positioning groove is further included. The positioning groove is opened on the fixing plate, and the depth of the positioning groove is 1.5 cm.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention achieves stable clamping of the battery cell by cooperating with the booster pump and the sliding box. At the same time, the pressure in the sliding box is maintained constant by the pressure relief valve located on the pressure relief pipe, ensuring that the fixed plate applies consistent pressure to the battery cell. This not only improves the clamping stability and prevents the battery cell from being damaged due to excessive pressure, but also reduces the detection error caused by the shaking of the battery cell, thereby ensuring the accuracy of the detection data.

[0019] During the pressurization process, excess gas is discharged through the pressure relief pipe, and an air curtain wall is formed under the action of the hollow cavity of the sliding seat and the air nozzle, which effectively blocks dust and impurities from approaching the laser ranging sensor lens, adjusts the surrounding microenvironment, stabilizes the laser ranging optical path, avoids environmental factors from interfering with the detection results, and further improves the detection accuracy;

[0020] The pressure relief airflow drives the impeller in the pressure relief pipe to drive the reciprocating screw, causing the sliding seat to perform linear reciprocating motion under the guidance of guide rod 1, enabling the sensor to measure the same position of the battery cell multiple times or continuously scan adjacent areas. By reducing random errors through multiple measurements and obtaining more dense data points through continuous scanning, the accuracy and comprehensiveness of the detection are significantly improved, and subtle changes in the thickness of the aluminum-plastic film are accurately captured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the present invention Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention Figure 3 ;

[0024] Figure 4 It is a structural diagram of the sliding box and the fixed plate of the present invention;

[0025] Figure 5 It is a cross-sectional view of the sliding box, slider, and fixed plate of the present invention;

[0026] Figure 6 It is a partial structural schematic diagram of the present invention;

[0027] Figure 7 It is a cross-sectional view of the sliding seat and the laser ranging sensor of the present invention.

[0028] In the figure: 1. Base; 101. Mounting plate; 2. Sliding box; 201. Slider; 202. Connecting rod; 203. Fixed plate; 204. Spring; 205. Positioning groove; 3. Booster pump; 301. Air pipe; 302. Pressure relief pipe; 303. Exhaust pipe; 4. Sliding seat; 401. Laser ranging sensor; 402. Fixing bolt; 403. Hollow cavity; 404. Air nozzle; 405. Moving seat; 406. Reciprocating screw; 407. Guide rod 1; 408. Impeller; 5. Screw; 501. Guide rod 2; 502. Drive handle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] Example 1: Reference Figure 1 、 Figure 2 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 A device for detecting the thickness of an aluminum-plastic film package of a battery cell comprises a base 1, on which a mounting plate 101 is fixedly mounted, and further comprises: a sliding box 2, symmetrically fixedly connected to the base 1, wherein a slider 201 is slidably connected in the sliding box 2, a connecting rod 202 is fixedly connected to the slider 201, and one end of the connecting rod 202 passes through the sliding box 2 and is fixedly connected to a fixing plate 203; a pressurizing component, which is arranged on the mounting plate 101 and is used to inflate and pressurize the sliding box 2; a movable seat 405, It is movably connected to the mounting plate 101; the sliding seat 4 is slidably connected to the movable seat 405 through a guide mechanism, wherein a hollow cavity 403 is provided in the sliding seat 4, and a plurality of air nozzles 404 connected to the hollow cavity 403 are equidistantly provided on the circumference of the sliding seat 4; a pressure relief pipe 302, one end of which is connected to the sliding box 2, and the other end is connected to the hollow cavity 403, wherein a pressure relief valve is provided on the pressure relief pipe 302; the laser ranging sensor 401 is disassembled and connected to the sliding seat 4.

[0031] The boosting component includes a boosting pump 3 and an air pipe 301. The boosting pump 3 is fixedly mounted on the mounting plate 101. One end of the air pipe 301 is connected to the output end of the boosting pump 3, and the other end is connected to the sliding box 2. A one-way valve is provided on the air pipe 301.

[0032] The mounting plate 101 is rotatably connected to a screw rod 5, and the mounting plate 101 is fixedly connected to a guide rod 2 501. The movable seat 405 is slidably connected to the guide rod 2 501 and is threadedly connected to the screw rod 5. When the screw 5 rotates, it can drive the movable seat 405 to drive the sliding seat 4 and the laser ranging sensor 401 to move along the guide rod 2 501.

[0033] It also includes a driving handle 502 , which is fixedly mounted on one end of the screw rod 5 .

[0034] The guide mechanism includes a guide rod 407 , one end of which is fixedly connected to the moving seat 405 , and the sliding seat 4 is slidably connected to the guide rod 407 .

[0035] The movable seat 405 is rotatably connected to a reciprocating screw 406 , the sliding seat 4 is threadedly connected to the reciprocating screw 406 , the pressure relief pipe 302 is fixedly connected to the movable seat 405 , and an impeller 408 is fixedly installed on one end of the reciprocating screw 406 passing through the pressure relief pipe 302 .

[0036] When a battery cell needs to be inspected, an operator or a robotic arm moves the battery cell to be inspected between the two fixed plates 203 and starts the booster pump 3. Gas flows into the sliding box 2 in one direction through the gas pipe 301, pushing the slider 201 to slide toward the side close to the battery cell. The fixed plate 203 on it moves synchronously with the slider 201 through the connecting rod 202 until the fixed plate 203 and the battery cell are abutted, thereby achieving the clamping of the fixed plate 203 on the battery cell, ensuring the stable position of the battery cell during inspection and reducing the inspection error caused by the shaking of the battery cell.

[0037] When the air pressure continuously boosted by the boost pump 3 into the sliding box 2 is greater than the pressure relief value set by the pressure relief valve on the pressure relief pipe 302, the pressure relief valve automatically opens to relieve the pressure, so that the excess gas continuously boosted into the sliding box 2 is discharged from the sliding box 2 through the pressure relief pipe 302, thereby maintaining the internal pressure of the sliding box 2 constant and ensuring that the force exerted by the fixed plate 203 on the battery cell is always consistent, which not only improves the stability of the fixed plate 203 in clamping the battery cell, but also prevents excessive pressure on the battery cell, causing damage to the battery cell. At the same time, the gas discharged from the sliding box 2 through the pressure relief pipe 302 is transported into the hollow cavity 403 and finally ejected from the air nozzle 404, forming an airflow curtain wall around the outer wall of the laser ranging sensor 401. The airflow curtain wall can prevent dust and impurities from approaching the lens of the laser ranging sensor 401, and can also adjust the microenvironment around the sensor (such as temperature and airflow disturbance), stabilize the optical path of the laser ranging, assist the laser ranging sensor 401 to exert high-precision performance, and ensure accurate thickness detection results;

[0038] At the same time, when the gas in the sliding box 2 flows to the hollow cavity 403 of the sliding seat 4 through the pressure relief pipe 302, the air flow passes through the impeller 408 in the pressure relief pipe 302, pushing the impeller 408 to rotate, thereby driving the reciprocating screw 406 to rotate synchronously. Since the sliding seat 4 is threadedly connected to the reciprocating screw 406 and under the guidance of the guide rod 1 407, the sliding seat 4 will make a linear reciprocating motion along the guide rod 1 407. When the laser ranging sensor 401 performs thickness detection, this reciprocating motion enables the sensor to perform multiple measurements on the same position of the aluminum-plastic film package of the battery cell, or to perform continuous scanning and measurement of adjacent areas. On the one hand, multiple measurements of the same position can reduce random errors and improve detection accuracy through algorithms such as data averaging. On the other hand, continuous scanning of adjacent areas can obtain more dense thickness data points, thereby improving the comprehensiveness of detection.

[0039] Then, when it is necessary to drive the movable base 405 to move by the screw rod 5, the operator holds the driving handle 502 and rotates the handle clockwise or counterclockwise in the required direction to drive the screw rod 5 to rotate, thereby moving the movable base 405 along the guide rod 2 501, thereby realizing manual adjustment of the detection position of the laser ranging sensor 401, thereby being able to detect the thickness of the aluminum-plastic film package at different positions of the battery cell; when the movable base 405 drives the sliding base 4 to move as a whole, the guide rod 1 407 provides guidance for the sliding base 4, ensuring that the direction of the sliding base 4 moving synchronously with the movable base 405 is accurate, so that the movement of the sliding base 4 and the laser ranging sensor 401 is more accurate and stable, whether it is moving with the overall movement of the movable base 405 or sliding finely relative to the movable base 405, the movement direction can be guaranteed to be accurate, thereby avoiding the error of the laser ranging position caused by movement deviation, thereby improving the accuracy of thickness detection;

[0040] When moving, the laser ranging sensor 401 is turned on to emit a laser beam, which is reflected by the surface of the aluminum-plastic film of the battery cell and then received. The distance between the sensor and the surface of the aluminum-plastic film is calculated based on the round-trip time of the laser and the speed of light. Through this mobile detection, the thickness data at different positions are collected. After processing and analysis, the thickness of the aluminum-plastic film package of the battery cell can be obtained.

[0041] In summary, the cooperation between the booster pump 3 and the sliding box 2 achieves stable clamping of the battery cell, reducing detection errors caused by battery cell shaking; the pressure relief valve is located on the pressure relief pipe 302, maintaining a constant pressure in the sliding box 2, ensuring that the fixed plate 203 applies a consistent pressure to the battery cell, which can not only improve clamping stability, but also prevent excessive pressure from damaging the battery cell, thereby ensuring the accuracy of the detection data;

[0042] During the pressurization process, excess gas is discharged through the pressure relief pipe 302, and an air curtain wall is formed under the action of the hollow cavity 403 of the sliding seat 4 and the air nozzle 404, which prevents dust and impurities from approaching the lens of the laser ranging sensor 401. At the same time, the microenvironment around the sensor is adjusted, the laser ranging optical path is stabilized, and the sensor is assisted in achieving high-precision performance, effectively avoiding the interference of environmental factors on the detection results, and further improving the accuracy of the detection data.

[0043] The pressure relief airflow drives the impeller 408 in the pressure relief pipe 302 to drive the reciprocating screw 406, so that the sliding seat 4, which is threadedly connected to the reciprocating screw 406, performs linear reciprocating motion under the guidance of the guide rod 407, so that the sensor can measure the same position of the battery cell multiple times or continuously scan adjacent areas. Multiple measurements reduce random errors, and continuous scanning obtains more dense data points, significantly improving detection accuracy and comprehensiveness, and can accurately capture subtle changes in the thickness of the aluminum-plastic film.

[0044] The screw 5 cooperates with the guide rod 2 501 and the driving handle 502 to realize manual adjustment of the detection position, which can flexibly detect different positions of the battery cell. The guide rod 1 407 provides precise guidance for the sliding seat 4 to ensure the accurate movement direction of the sensor, avoid ranging errors due to motion deviation, enhance the adaptability of the device to battery cells of different sizes and shapes, and meet diversified detection needs.

[0045] It should be noted that the pressure relief pipe 302 is a stretchable and shrinkable hose, so the pressure relief pipe 302 will not interfere with the movement of the movable seat 405 and the sliding seat 4.

[0046] Example 2: Reference Figure 4 、 Figure 5 , a device for detecting the thickness of the aluminum-plastic film package of a battery core, which is basically the same as Example 1, furthermore, an exhaust pipe 303 is fixedly connected to the sliding box 2, and an electromagnetic valve is provided on the exhaust pipe 303.

[0047] A spring 204 is provided in the sliding box 2 . The spring 204 is sleeved on the connecting rod 202 . One end of the spring 204 is fixedly connected to the slider 201 , and the other end is fixedly connected to the inner wall of the sliding box 2 .

[0048] When the boost component inflates and pressurizes the sliding box 2, the slider 201 is pushed to slide by the air pressure, compressing the spring 204. The spring 204 produces elastic deformation to store elastic potential energy. When the battery cell detection is completed and the battery cell needs to be released, the solenoid valve on the exhaust pipe 303 is controlled to open, and the high-pressure gas in the sliding box 2 is discharged through the exhaust pipe 303, and the air pressure in the box is reduced. At this time, the spring 204 releases the elastic potential energy, pushing the slider 201 to slide in the opposite direction, driving the connecting rod 202 and the fixed plate 203 to reset, quickly releasing the battery cell, facilitating the removal and placement of the battery cell and the next detection cycle, and improving the detection efficiency. Among them, the setting of the spring 204 not only realizes the automatic reset of the fixed plate 203 without the need for an additional complex reset drive mechanism, but also can stably store energy during boosting and stably release it after pressure relief, ensuring that the reset action is smooth and reliable, so that it can make the operation of releasing the battery cell by the fixed plate 203 accurate and controllable, avoiding damage to the battery cell due to unstable reset.

[0049] It should be noted that before the battery cell is clamped, the solenoid valve is in a closed state to ensure that the sliding box 2 can be effectively pressurized.

[0050] Example 3: Reference Figure 7 , a device for detecting the thickness of an aluminum-plastic film package of a battery cell, which is basically the same as that of Example 1, and further includes a plurality of fixing bolts 402, and a laser ranging sensor 401 is detachably connected to the sliding seat 4 through the plurality of fixing bolts 402;

[0051] During installation, place the laser ranging sensor 401 on the mounting position of the sliding seat 4, align it with the threaded hole, and use a tool (such as a wrench) to tighten the fixing bolts 402 one by one to ensure that the sensor is firmly connected to the sliding seat 4;

[0052] When disassembling, reverse the operation and use a tool to loosen the fixing bolt 402 to remove the sensor from the sliding seat 4 for easy maintenance, replacement or calibration;

[0053] In summary, this detachable connection design can make the maintenance and replacement of the laser ranging sensor 401 simple and quick. In actual production, the sensor may experience a decrease in accuracy or failure due to long-term use. At this time, there is no need to disassemble the entire device. You only need to unscrew the fixing bolt 402 to quickly replace the sensor, which greatly shortens the equipment downtime and improves production efficiency.

[0054] Example 4: Reference Figure 4 A device for detecting the thickness of an aluminum-plastic film package of a battery cell is substantially the same as that of Example 1, and further comprises a positioning groove 205, the positioning groove 205 being provided on the fixing plate 203, and the depth of the positioning groove 205 being 1.5 cm;

[0055] When the battery cell needs to be inspected, the operator or robotic arm places the battery cell in the positioning groove 205 and uses the boundary of the groove to preliminarily position the battery cell to ensure that the battery cell is relatively fixed in the horizontal direction. Then, as the fixing plate 203 moves toward the battery cell under the action of air pressure, the groove wall of the positioning groove 205 contacts the side of the battery cell, further limiting the displacement of the battery cell, allowing the laser ranging sensor 401 to detect the thickness of its aluminum-plastic film package, thereby avoiding detection errors caused by shaking or displacement of the battery cell. Among them, the 1.5 cm depth design of the positioning groove 205 can provide sufficient positioning constraints for the battery cell without affecting the detection of the edge area of ​​the battery cell by the laser ranging sensor 401 due to being too deep.

[0056] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with the preferred embodiment, it is not intended to limit the present invention.

Claims

1. A device for detecting the thickness of an aluminum-plastic film package of a battery cell, comprising a base (1), a mounting plate (101) being fixedly mounted on the base (1), characterized in that: Also includes: A sliding box (2) is symmetrically fixedly connected to the base (1), wherein a slider (201) is slidably connected inside the sliding box (2), a connecting rod (202) is fixedly connected to the slider (201), and one end of the connecting rod (202) that passes through the sliding box (2) is fixedly connected to a fixing plate (203); A pressurizing component, arranged on the mounting plate (101) and used for inflating and pressurizing the interior of the sliding box (2); A movable seat (405) movably connected to the mounting plate (101); The sliding seat (4) is slidably connected to the moving seat (405) through a guide mechanism. A hollow cavity (403) is provided in the sliding seat (4), and a plurality of air jet nozzles (404) connected to the hollow cavity (403) are equidistantly provided on the circumference of the sliding seat (4); a pressure relief pipe (302), one end of which is connected to the sliding box (2) and the other end of which is connected to the hollow cavity (403), wherein a pressure relief valve is provided on the pressure relief pipe (302); The laser distance measuring sensor (401) is detachably connected to the sliding seat (4).

2. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 1, characterized in that: The boosting component comprises a boosting pump (3) and an air delivery pipe (301). The boosting pump (3) is fixedly mounted on the mounting plate (101). One end of the air delivery pipe (301) is connected to the output end of the boosting pump (3), and the other end is connected to the sliding box (2). A one-way valve is provided on the air delivery pipe (301).

3. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 1, characterized in that: An exhaust pipe (303) is fixedly connected to the sliding box (2), and a solenoid valve is provided on the exhaust pipe (303).

4. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 3, characterized in that: A spring (204) is provided in the sliding box (2), and the spring (204) is sleeved on the connecting rod (202). One end of the spring (204) is fixedly connected to the slider (201), and the other end is fixedly connected to the inner wall of the sliding box (2).

5. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 1, characterized in that: The mounting plate (101) is rotatably connected to a screw rod (5), the mounting plate (101) is fixedly connected to a second guide rod (501), the movable seat (405) is slidably connected to the second guide rod (501), and is threadedly connected to the screw rod (5). When the screw rod (5) rotates, the movable seat (405) can be driven to drive the sliding seat (4) and the laser ranging sensor (401) to move along the second guide rod (501).

6. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 5, characterized in that: It also includes a driving handle (502), which is fixedly mounted on one end of the screw rod (5).

7. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 5, characterized in that: The guide mechanism comprises a guide rod 1 (407), one end of which is fixedly connected to the movable seat (405), and the sliding seat (4) is slidably connected to the guide rod 1 (407).

8. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 7, characterized in that: A reciprocating screw (406) is rotatably connected to the movable seat (405), the sliding seat (4) is threadedly connected to the reciprocating screw (406), the pressure relief pipe (302) is fixedly connected to the movable seat (405), and an impeller (408) is fixedly installed on one end of the reciprocating screw (406) that passes through the pressure relief pipe (302).

9. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 1, characterized in that: It also includes a plurality of fixing bolts (402), and the laser distance measuring sensor (401) is detachably connected to the sliding seat (4) via the plurality of fixing bolts (402).

10. The device for detecting the thickness of the aluminum-plastic film package of a battery cell according to claim 1, characterized in that: It also includes a positioning groove (205), which is opened on the fixing plate (203) and has a depth of 1.5 cm.

Images