Positioning welding equipment and method for new energy battery cover plate production line

Abstract

The invention relates to the technical field of battery production, and discloses positioning welding equipment and method for a new energy battery cover plate production line. A welding table is provided with a lifter and a vibrator, an output shaft of the lifter is connected with a base, a base table is fixed to the base, a pressure sensing ring is arranged on the annular side of the base table, and an output shaft of the vibrator is connected with a vibration block matched with a strip groove; an infrared module is arranged in the center of the base; a plurality of pressure probes are arranged on the pressure sensing ring; the base station and the pressure sensing ring are respectively provided with a second hole channel and a third hole channel which are collinear with the axis of the first hole channel; a photoelectric signal transmitter and a photoelectric signal receiver are arranged on the two sides of the substrate respectively, and the signal transmission path is aligned with the hole channel. Through cooperation of multiple modules, precise positioning and horizontal calibration of the battery box and fixture state monitoring are achieved, the problems of positioning deviation and unstable welding quality caused by mechanical abrasion and deformation of traditional equipment are effectively solved, and the welding precision and stability are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and particularly to a positioning welding device and method for a new energy battery cover plate production line. Background Art

[0002] In the field of new energy battery production, the positioning welding of battery cover plates is one of the key processes, and its accuracy directly affects the sealing, safety, and overall performance of the battery.

[0003] The traditional positioning welding equipment mainly has the following technical bottlenecks: Under long-term high-frequency use, mechanical positioning jigs and fixtures are prone to wear and deformation, resulting in positioning deviation of the battery box, a decrease in the accuracy of the welding position, and even quality defects such as missed welding and offset welding. Moreover, during the welding process, the support platform frequently bears friction, impact, and thermal stress, and is prone to minor deformation or horizontal offset, thereby causing the positioning reference of the fixture to fail and affecting the welding consistency.

[0004] Therefore, how to avoid the positioning deviation and unstable welding quality problems caused by mechanical wear and deformation of traditional equipment and ensure the welding quality of the relevant structures of the battery box has become a technical problem to be solved. Summary of the Invention

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention provides a positioning welding device for a new energy battery cover plate production line, including a welding table. The welding table is configured with a welding component. The welding table is also configured with a substrate for positioning and placing a battery box. Positioning jigs for fixing the battery box are arranged on both sides of the substrate. A square groove is opened at the center position of the substrate. Strip grooves are opened on both sides of the square groove. The substrate is also provided with a first hole, and the first hole horizontally penetrates through the substrate and communicates with the square groove.

[0007] The welding table is configured with a lifter and vibrators located on both sides of the lifter. The output shaft of the lifter faces upward and its output shaft is fixedly connected to a base. A base platform matching the position of the square groove is fixedly installed on the upper side of the base. A pressure sensing ring is fixedly configured on the circumferential side of the base platform. The output shaft of the vibrator faces upward and its output shaft is fixedly connected to a vibration block matching the position of the strip groove.

[0008] Among them, an infrared module for vertically upward detecting a shielding signal is configured at the center position of the base platform. The pressure sensing ring is provided with a plurality of pressure sensors. The base platform is provided with a second hole, and the second hole horizontally penetrates through the base platform. The pressure sensing ring is provided with a third hole, and the third hole horizontally penetrates through the pressure sensing ring. The axis lines of the first hole, the second hole, and the third hole are distributed in the same straight line direction.

[0009] On one side of the substrate, an optoelectronic signal transmitter is arranged, and on the other side, an optoelectronic signal receiver is arranged. The signal transmission paths of the optoelectronic signal transmitter and the optoelectronic signal receiver are aligned with the first channel, the second channel, and the third channel.

[0010] As a preferred technical solution of the device of the present invention: screw hole sleeves are provided at the corner positions of the bottom surface of the substrate. Support screws are tightly screwed at the positions of the screw hole sleeves, and the lower ends of the support screws are fixedly connected to the welding table through positioning nuts.

[0011] As a preferred technical solution of the device of the present invention: a detection port is opened at the center position of the base. The infrared module is fixed in the detection port. A bottom circular groove matching the detection port is opened on the bottom surface of the base. Fixed screw holes are provided in the area of the bottom circular groove. The infrared module is provided with a fixed bracket installed in the bottom circular groove, and the fixed bracket is provided with an installation hole structure matching the fixed screw holes.

[0012] As a preferred technical solution of the device of the present invention: a circumferential notch is opened on the circumferential side of the base, and the pressure-sensitive ring is installed at the position of the circumferential notch. A plurality of circumferential screw holes are opened at the position of the circumferential notch. The pressure-sensitive ring is provided with a plurality of circumferential fixing holes, and the circumferential fixing holes are aligned with the circumferential screw holes one by one and are provided with bolts.

[0013] As a preferred technical solution of the device of the present invention: a gap is left between the inner side wall surface of the square groove and the circumferential side surfaces of the base and the pressure-sensitive ring, and a gap is left between the inner side surface of the strip groove and the circumferential side surface of the vibration block.

[0014] As a preferred technical solution of the device of the present invention: the top surface of the pressure-sensitive ring is flush with the top surface of the base, and the top surfaces of the pressure-sensitive ring and the base are both in contact with the bottom surface of the battery box.

[0015] As a preferred technical solution of the device of the present invention: the top surface of the vibration block is in contact with the bottom surface of the battery box. A rubber layer is arranged on the top surface of the vibration block, and the edge position adopts a rounded corner structure.

[0016] The present invention provides a control method for a positioning and welding device, including the following content:

[0017] S1. Place the battery box in the designated area of the substrate. The infrared module detects whether there is an occlusion signal. If an occlusion signal is detected, it is determined that the battery box is in place and enters the next step.

[0018] S2. The optoelectronic signal transmitter emits an optoelectronic signal, and it is judged whether the optoelectronic signal receiver receives the optoelectronic signal passing through the first channel, the second channel, and the third channel:

[0019] S2.1. If received, it indicates that the horizontal states of the substrate, the base, and the pressure-sensitive ring are normal, and enters the next step.

[0020] S2.2. If not received, the system outputs a horizontal state abnormal prompt signal.

[0021] S3. The system obtains the pressure information of multiple pressure sensors of the pressure sensing ring, denoted as [P1, P2, P3, ..., P n , and takes the pressure information P x ∈ [P1, P2, P3, ..., P n of any one pressure sensor as the initial reference pressure of the pressure sensor.

[0022] S4. The positioning fixture acts to clamp and fix the battery case on the substrate. During the process from the start of the action of the positioning fixture to the completion of clamping and fixing, the system continuously obtains the pressure information of multiple pressure sensors of the pressure sensing ring. Condition 1: The fluctuation percentage of the pressure of any one pressure sensor relative to its initial reference pressure exceeds the preset reference percentage.

[0023] S5. If Condition 1 is satisfied, start the vibration diagnosis mode:

[0024] S5.1. The lifter increases the upward output torque until the system obtains that the pressure information of any one pressure sensor is the same as the downward acting force generated by the weight of the battery case itself.

[0025] S5.2. The vibrator drives the vibration block to vibrate the bottom surface of the battery case. The vibration intensity output by the vibrator is lower than the clamping and fixing intensity of the positioning fixture on the battery case. The vibration duration is controlled within 1 - 3 seconds. The system continuously obtains the pressure information of multiple pressure sensors of the pressure sensing ring to determine whether Condition 1 is still satisfied.

[0026] S5.3. If Condition 1 is still satisfied, it is determined that there is an abnormality in the clamping and fixing of the positioning fixture on the battery case, and the system outputs a corresponding prompt signal;

[0027] S6. If Condition 1 is not satisfied, the welding assembly starts to weld the battery cover of the battery case.

[0028] Compared with the existing technology, through the collaborative design of multiple modules, the present invention effectively guarantees the accuracy and stability of the positioning welding of the new energy battery cover, and effectively avoids the positioning deviation problem caused by mechanical wear of traditional equipment. The main beneficial technical effects are as follows:

[0029] 1. In the present invention, the infrared module detects the in-place state of the battery case in real time. The optoelectronic signal component can quickly identify the horizontal offset, deformation, etc. of the substrate, base, and pressure sensing ring through the optical reference lines formed by the first, second, and third channels, avoiding the welding position deviation caused by substrate deformation from the source.

[0030] 2. The present invention collects circumferential pressure data in real time through the annular pressure probe network of the pressure sensing ring, and accurately judges the clamping uniformity of the fixture by comparing the pressure fluctuations before and after the positioning fixture operates. If the pressure fluctuation exceeds the limit, the system automatically triggers the vibration diagnosis mode, verifies the fixture stability by simulating welding disturbances, and effectively identifies potential hidden dangers such as fixture wear and looseness.

[0031] 3. In the vibration diagnosis mode of the present invention, the lifter achieves pressure balance through torque adjustment, and the vibrator applies low-frequency vibration with an intensity lower than the clamping force. Combining with dynamic analysis of pressure data, it can accurately distinguish the placement offset of the battery box from the structural abnormality of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the battery cover positioning welding equipment of the present invention.

[0033] Figure 2 is Figure 1 the partial enlarged structural schematic diagram at position A in

[0034] Figure 3 is Figure 2 the partial enlarged structural schematic diagram at position B in

[0035] Figure 4 is the overall structural schematic diagram of the substrate and related components in the present invention.

[0036] Figure 5 is Figure 4 the schematic diagram of the bottom side elevation position of the substrate and related components in

[0037] Figure 6 is the disassembly and separation schematic diagram of the substrate and related components in the present invention.

[0038] Figure 7 is the structural schematic diagram of the substrate in the present invention.

[0039] Figure 8 is the disassembly and separation schematic diagram of the infrared module, base, and pressure sensing ring in the present invention.

[0040] Figure 9 is the schematic diagram of the bottom side elevation position of the infrared module and base in the overall of the present invention.

[0041] Wherein: 1 - welding table; 2 - welding assembly; 3 - support screw; 4 - substrate, 401 - square groove, 402 - strip groove, 403 - first duct, 404 - screw hole sleeve; 5 - positioning nut; 6 - lifter; 7 - base; 8 - infrared module, 801 - fixing bracket; 9 - base platform, 901 - circumferential notch, 902 - detection port, 903 - second duct, 904 - circumferential screw hole, 905 - bottom circular groove, 906 - fixing screw hole, 907 - bottom surface screw hole; 10 - pressure sensing ring, 1001 - pressure probe, 1002 - third duct, 1003 - circumferential fixing hole; 11 - vibrator; 12 - vibration block; 13 - battery box; 14 - positioning fixture; 15 - photoelectric signal transmitter; 16 - photoelectric signal receiver. Detailed implementation manner

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Embodiment 1. As Figure 1 、 Figure 2 、 Figure 3 , the positioning and welding equipment of the new energy battery cover plate production line of the present invention mainly consists of a welding table 1, a substrate 4, a positioning fixture 14, a lifter 6, a vibrator 11, a base platform 9, a pressure sensing ring 10, an infrared module 8 and a photoelectric signal detection component (a photoelectric signal transmitter 15, a photoelectric signal receiver 16), etc. The positioning fixtures 14 are symmetrically arranged on both sides of the substrate 4 and are used to clamp the battery box 13.

[0044] As Figure 1 、 Figure 2 、 Figure 4 、 , a square groove 401 is opened at the center of the substrate 4, strip grooves 402 are provided on both sides, the horizontally penetrating first duct 403 communicates with the square groove 401, and screw hole sleeves 404 are provided at the bottom corners of the substrate 4 and are fixed to the welding table 1 through the support screw 3 and the positioning nut 5, and the height and levelness of the substrate 4 can be adjusted.

[0045] As Figure 5 、 Figure 4 、 Figure 5 、 Figure 6 , the square groove 401 provides a moving space for the base platform 9, and the strip groove 402 provides a moving space for the vibration block 12 to avoid mechanical interference. The first duct 403 is aligned with the subsequent second duct 903 and third duct 1002 to form a photoelectric signal transmission path for detecting the horizontal consistency of the substrate 4, the base platform 9, and the pressure sensing ring 10 (if the level is abnormal, the photoelectric signal receiver 16 cannot receive the signal and the system alarms).

[0046] The combined design of the screw hole sleeve 404, the support screw 3, and the positioning nut 5 enables the substrate 4 to finely adjust its height by rotating the screw, adapting to the installation errors of equipment in different batches and enhancing the equipment compatibility. The positioning fixture 14 mechanically clamps and fixes the battery box 13, and its precision directly affects the accuracy of the welding position. It is the basic execution unit of the positioning system.

[0047] As Figure 7 , Figure 1 , Figure 2 , Figure 3 , the lifter 6 is installed below the welding table 1, and the output shaft is connected to the base 7. The base 7 is bolted to the base table 9 through the bottom screw holes 907 and the installation holes opened on itself. The top surface of the base table 9 abuts against the bottom surface of the battery box 13, a detection port 902 is provided at the center, an infrared module 8 is built in, and a bottom circular groove 905 is opened on the bottom surface. The infrared module 8 is fixed through the fixing bracket 801.

[0048] As Figure 9 , Figure 3 , Figure 4 , Figure 7 , a ring-shaped notch 901 is opened on the circumferential side of the base table 9, the pressure-sensitive ring 10 is installed, and it is bolted to the circumferential fixing hole 1003 of the pressure-sensitive ring 10 through the circumferential screw hole 904. The horizontally penetrating second hole 903 is aligned with the first hole 403.

[0049] As Figure 8 , Figure 2 , Figure 3 , the lifter 6 adjusts the height of the base table 9 so that the top surface of the base table 9 is flush with the top surface of the pressure-sensitive ring 10 (both are in contact with the bottom surface of the battery box 13), ensuring that both jointly bear the weight of the battery box 13 and avoiding uneven local stress.

[0050] The base table 9 serves as the main support structure. Its detection port 902 and infrared module 8 are used to detect whether the battery box 13 is in place (blocking the infrared signal is determined as in place, triggering the subsequent process). Combining Figure 4 , Figure 3 , the second hole 903 cooperates with the optoelectronic signal path to ensure the reliability of the horizontal detection. The split design of the ring-shaped notch 901 and the pressure-sensitive ring 10 enables the pressure-sensitive ring 10 to independently sense the circumferential pressure change, providing a hardware basis for the real-time monitoring of the clamping force of the fixture.

[0051] As Figure 8 , Figure 3 , Figure 4 , Figure 7, The pressure-sensitive ring 10 is sleeved on the circumferential side of the base 9, and its top surface is flush with the base 9, both of which are in contact with the bottom surface of the battery box 13. Multiple pressure sensors 1001 are provided in the ring body, and pressure sensors are built in to collect circumferential pressure data in real time; the horizontally penetrating third channel 1002 is aligned with the second channel 903 and the first channel 403. The pressure sensors 1001 form an annular pressure detection network, and by monitoring the pressure fluctuations at each point, the clamping uniformity of the positioning fixture 14 is judged. If the pressure fluctuation in a certain area is abnormal, it may indicate that the fixture is worn, loose, or the battery box is placed offset, and it is necessary to further verify through the vibration diagnosis mode. The flush design of the pressure-sensitive ring 10 and the base 9 ensures that the two are synchronously stressed, and the third channel 1002 continues the optical signal path, further ensuring the integrity of horizontal detection.

[0052] As Figure 8 , 5 , 6, the vibrators 11 are distributed on both sides of the lifter 6 and fixed to the welding table 1. The output shafts of the vibrators 11 are connected to the vibration blocks 12. A rubber layer is provided on the top surface of the vibration blocks 12. The edges of the vibration blocks 12 are rounded structures, corresponding to the positions of the strip grooves 402, and the top surfaces of the vibration blocks 12 are in contact with the bottom surface of the battery box 13.

[0053] The vibration blocks 12 apply low-frequency vibrations (the vibration intensity is lower than the clamping force of the fixture) to the bottom surface of the battery box 13 under the drive of the vibrators 11, which is used to simulate the mechanical disturbances that may occur during the welding process. If the pressure fluctuation still exceeds the limit after vibration, it can be determined that there are structural abnormalities (such as wear, jamming) in the fixture, and it is necessary to stop the machine for maintenance.

[0054] The rubber layer and the rounded design reduce the damage to the surface of the battery box caused by vibration. At the same time, the vibration energy is transmitted through flexible contact, avoiding detection errors caused by rigid collisions.

[0055] As Figure 4 , Figure 2 , Figure 3 Figure 8 , the optical signal transmitter 15 and the receiver 16 are respectively arranged on both sides of the substrate 4, and the signal path is aligned with the axis lines of the first channel 403, the second channel 903, and the third channel 1002.

[0056] The optical signals form a "light optical reference line" in a horizontal state. If any component of the substrate 4, the base 9, or the pressure-sensitive ring 10 is tilted or deformed, it will cause the misalignment of the channels, the optical signals will be blocked, and the receiver 16 cannot receive the signals. The system will immediately alarm to avoid the positioning deviation of the battery box 13 caused by the unevenness of the substrate 4, and prevent the risk of welding position deviation from the source.

[0057] Embodiment 2: The present invention designs a control method for a positioning welding device, and the specific content is as follows:

[0058] The optoelectronic signal emitter 15 emits an optoelectronic signal, which passes through the first channel 403, the second channel 903, and the third channel 1002. The optoelectronic signal receiver 16 receives the optoelectronic signal, and the substrate 4, the base 9, and the pressure sensing ring 10 are in a normal horizontal state. If the optoelectronic signal receiver 16 does not receive the optoelectronic signal, the horizontal states of the substrate 4, the base 9, and the pressure sensing ring 10 are abnormal, and the system outputs a corresponding prompt signal.

[0059] At this time, the system obtains the pressure information of multiple pressure probes 1001 of the pressure sensing ring 10, denoted as [P1, P2, P3,..., P n , and there exists any pressure information Px of a pressure probe 1001 belonging to [P1, P2, P3,..., P n , denoted as P x as the initial reference pressure of the pressure probe 1001.

[0060] The positioning fixture 14 acts to clamp and fix the battery box 13 on the substrate 4. During the process from when the positioning fixture 14 starts to act until it completes the clamping and fixing of the battery box 13, the system continuously obtains the pressure information of multiple pressure probes 1001 of the pressure sensing ring 10:

[0061] Condition 1: The fluctuation percentage of the pressure of any one pressure probe 1001 relative to its initial reference pressure exceeds the preset reference percentage.

[0062] If Condition 1 is satisfied, the vibration diagnosis mode is started. The vibration diagnosis mode:

[0063] The lifter 6 increases the upward output torque until the system obtains that the pressure information of any one pressure probe 1001 is the same as the downward acting force generated by the weight of the battery box 13 itself. For example, there are 4 pressure probes 1001, the weight of the battery box 13 is 10 KG, the gravity of the battery box 13 is 98 N, and the pressure detection area of each pressure probe 1001 is 4 cm 2 = 0.004 m 2 , when the pressure information of one pressure probe 1001 is balanced with the downward acting force generated by the weight of the battery box 13 itself, the detected pressure acting force is 6125 N / m 2 = 0.6125 N / cm 2 .

[0064] The vibrator 11 drives the vibration block 12 to vibrate the bottom surface of the battery box 13. Among them, the vibration intensity output by the vibrator 11 is lower than the clamping and fixing intensity of the positioning fixture 14 on the battery box 13, and the vibration duration is 1 to 3 seconds.

[0065] The system obtains the pressure information of multiple pressure probes 1001 of the pressure sensing ring 10 in real time. If condition one is still satisfied, it is determined that there is an abnormality in the clamping and fixing of the battery box 13 by the positioning fixture 14, and the system outputs a corresponding prompt signal.

[0066] Subsequently, technicians are required to repair the equipment and check the structure of the positioning fixture 14, etc. If there are problems, after corresponding repairs, restart the equipment. If no abnormalities are found during the inspection, cancel the abnormality prompted by the system. If the abnormality is manually cancelled three times in a row, the system locks the equipment and stops the equipment from continuing to work to prevent the illegal operation of the operator forcibly turning on the machine for production efficiency when abnormal problems have already occurred.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning and welding device for a new energy battery cover plate production line, comprising a welding table (1), the welding table (1) is configured with a welding assembly (2), the welding table (1) is further configured with a substrate (4) for positioning and placing a battery box (13), and positioning jigs (14) for fixing the battery box (13) are arranged on both sides of the substrate (4), and it is characterized in that: A square groove (401) is opened at the center position of the substrate (4), strip grooves (402) are opened on both sides of the square groove (401), the substrate (4) is further provided with a first hole (403), and the first hole (403) horizontally penetrates through the substrate (4) and communicates with the square groove (401); The welding table (1) is configured with a lifter (6) and vibrators (11) located on both sides of the lifter (6), the output shaft of the lifter (6) faces upward and its output shaft is fixedly connected to a base (7), a base table (9) matching the position of the square groove (401) is fixedly installed on the upper side of the base (7), a pressure sensing ring (10) is fixedly arranged on the circumferential side of the base table (9), the output shaft of the vibrator (11) faces upward and its output shaft is fixedly connected to a vibration block (12) matching the position of the strip groove (402); An infrared module (8) for vertically upward detecting an occlusion signal is arranged at the center position of the base table (9), and the pressure sensing ring (10) is provided with a plurality of pressure probes (1001); Among them, the base table (9) is provided with a second hole (903), the second hole (903) horizontally penetrates through the base table (9), the pressure sensing ring (10) is provided with a third hole (1002), the third hole (1002) horizontally penetrates through the pressure sensing ring (10), and the axis lines of the first hole (403), the second hole (903), and the third hole (1002) are distributed in the same straight line direction; A photoelectric signal emitter (15) is arranged on one side of the substrate (4), and a photoelectric signal receiver (16) is arranged on the other side, and the signal transmission paths of the photoelectric signal emitter (15) and the photoelectric signal receiver (16) are aligned with the first hole (403), the second hole (903), and the third hole (1002).

2. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: Screw hole sleeves (404) are arranged at the bottom corner positions of the substrate (4), support screws (3) are tightly screwed at the positions of the screw hole sleeves (404), and the lower ends of the support screws (3) are fixedly connected to the welding table (1) through positioning nuts (5).

3. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: A detection port (902) is opened at the center position of the base table (9), and the infrared module (8) is fixed in the detection port (902); The bottom surface of the base (9) is provided with a bottom circular groove (905) that cooperates with the detection port (902). A fixing screw hole (906) is provided in the area of the bottom circular groove (905). The infrared module (8) is configured with a fixing bracket (801) installed in the bottom circular groove (905). The fixing bracket (801) is provided with a mounting hole structure that cooperates with the fixing screw hole (906).

4. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: The circumferential side of the base (9) is provided with a circumferential notch (901), and the pressure-sensitive ring (10) is installed at the position of the circumferential notch (901); A plurality of circumferential screw holes (904) are provided at the position of the circumferential notch (901). The pressure-sensitive ring (10) is provided with a plurality of circumferential fixing holes (1003). The circumferential fixing holes (1003) are aligned with the circumferential screw holes (904) one by one and are configured with bolts.

5. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: A gap is left between the inner circumferential side wall surface of the square groove (401) and the circumferential side surfaces of the base (9) and the pressure-sensitive ring (10). A gap is left between the inner circumferential side surface of the strip groove (402) and the circumferential side surface of the vibration block (12).

6. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: The top surface of the pressure-sensitive ring (10) is flush with the top surface of the base (9). The top surface of the pressure-sensitive ring (10) and the top surface of the base (9) are both in contact with the bottom surface of the battery box (13).

7. The positioning and welding device for a new energy battery cover plate production line according to claim 1, characterized in that: The top surface of the vibration block (12) is in contact with the bottom surface of the battery box (13). The top surface of the vibration block (12) is provided with a layer of rubber layer and the edge position adopts a rounded corner structure.

8. A control method for a positioning welding device, applied to the positioning welding device of a new energy battery cover plate production line described in any one of claims 1 to 7, characterized in that, It includes the following content: S1. Place the battery box (13) in the specified area of the substrate (4). The infrared module (8) detects whether there is an occlusion signal. If an occlusion signal is detected, it is determined that the battery box (13) is in place and enters the next step; S2. The optoelectronic signal emitter (15) emits an optoelectronic signal, and it is judged whether the optoelectronic signal receiver (16) receives the optoelectronic signal passing through the first hole (403), the second hole (903), and the third hole (1002): S2.

1. If received, it indicates that the horizontal states of the substrate (4), the base (9), and the pressure-sensitive ring (10) are normal, and enters the next step; S2.

2. If not received, the system outputs a horizontal state abnormal prompt signal; S3. The system obtains the pressure information of multiple pressure sensors (1001) of the pressure sensing ring (10), denoted as [P1, P2, P3, ..., P n , and takes the pressure information P x ∈ [P1, P2, P3, ..., P n of any one pressure sensor (1001) as the initial reference pressure of the pressure sensor (1001); S4. The positioning fixture (14) acts to clamp and fix the battery box (13) on the substrate (4). During the process from the start of the action of the positioning fixture (14) to the completion of clamping and fixing, the system continuously obtains the pressure information of the plurality of pressure probes (1001) of the pressure-sensitive ring (10); Condition 1: The fluctuation percentage of the pressure of any one of the pressure probes (1001) relative to its initial reference pressure exceeds the preset reference percentage; S5. If Condition 1 is satisfied, start the vibration diagnosis mode: S5.

1. The lifter (6) increases the upward output torque until the pressure information of any one of the pressure sensors (1001) obtained by the system is the same as the downward acting force generated by the weight of the battery case (13) itself; S5.

2. The vibrator (11) drives the vibration block (12) to vibrate the bottom surface of the battery case (13). The vibration intensity output by the vibrator (11) is lower than the clamping and fixing intensity of the positioning fixture (14) on the battery case (13). The vibration duration is controlled within 1 to 3 seconds. The system obtains the pressure information of multiple pressure sensors (1001) of the pressure sensing ring (10) in real time to determine whether Condition 1 is still satisfied; S5.

3. If Condition 1 is still satisfied, it is determined that there is an abnormality in the clamping and fixing of the battery case (13) by the positioning fixture (14), and the system outputs a corresponding prompt signal; S6. If Condition 1 is not satisfied, the welding assembly (2) starts to weld the battery cover plate of the battery case (13).

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