Battery module busbar milling system

Abstract

The utility model relates to the technical field of battery disassembly, and discloses a battery module busbar milling system which comprises a conveying mechanism, a fixing mechanism and a milling station, the fixing mechanism is used for fixing a battery module, the conveying mechanism is used for conveying the fixing mechanism, the milling station comprises a moving mechanism and a plurality of milling spindles arranged on the moving mechanism, and the milling spindles are arranged on the moving mechanism. The milling spindles are used for mounting milling cutters for welding spot milling, and the movement mechanism is used for driving the plurality of milling spindles to alternately perform welding spot milling on the same battery module according to milling coordinates obtained in advance. The plurality of milling spindles alternately perform welding spot milling, so that the tool changing and tool setting requirements of the milling spindles are met, the idle time of equipment is shortened, and the milling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery disassembly, and in particular relates to a battery module busbar milling system. Background Art

[0002] Battery module busbar removal is a key process in battery recycling projects. Traditionally, busbar removal involves using a standard CNC milling machine to position and mill the busbars on the battery module, removing them and recovering the battery cells. Currently, busbar milling is mostly done dry (i.e., without cutting fluid). However, this method can cause the battery module to heat up rapidly during the milling process, potentially leading to fire or even explosion.

[0003] Traditional standard CNC milling machines mostly use the method of lifting and lowering the milling cutter and clamping the product to perform milling operations, which cannot meet the fire prevention function of product discharge. In order to solve this problem, the invention patent with application number 202310138869.1 discloses a waste battery module disassembly equipment, including a front-end conveying device, a vertical milling center, a roller emergency treatment device, an emergency water tank, and a rear-end conveying device. The device protects the safety of the equipment by discharging the burning battery module into the water tank. However, in order to ensure the milling accuracy, tool setting is required regularly, and in order to prevent tool breakage after long-term milling, tool change is required regularly; the vertical milling center in the above-mentioned disassembly equipment and the traditional milling machine are unable to continue milling operations when changing and setting the tool, resulting in low milling efficiency of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide a battery module busbar milling system that can meet the needs of tool changing and tool setting while improving milling efficiency.

[0005] To achieve the above objectives, the technical solution of the present utility model is as follows:

[0006] A battery module busbar milling system, the milling system comprising a conveying mechanism, a fixing mechanism, and a milling station;

[0007] The fixing mechanism is used to fix the battery module;

[0008] The conveying mechanism is used to convey the fixing mechanism to which the battery module is fixed;

[0009] The milling station includes a motion mechanism and a plurality of milling spindles, wherein the plurality of milling spindles are arranged on the motion mechanism;

[0010] The milling spindle is used to install a milling cutter for milling welds;

[0011] The motion mechanism is used to drive the multiple milling spindles to perform welding point milling on the same battery module in turn according to the pre-acquired milling coordinates.

[0012] The milling system also includes a blocking mechanism and a fire water tank;

[0013] The blocking mechanism is arranged in front of the milling station along the conveying direction of the conveying mechanism, and is used to stop the fixing mechanism below the milling station and release the fixing mechanism when the battery module catches fire;

[0014] The fire water tank is arranged at the discharge end of the conveying mechanism.

[0015] The milling system also includes a tool magazine and a tool setting instrument;

[0016] The tool magazine is used to store milling cutters to be replaced;

[0017] The motion mechanism is also used to drive the milling spindle that needs to change the tool to first move to the tool setting instrument for the first tool setting, then move to the tool magazine for tool change, and then move to the tool setting instrument for the second tool setting;

[0018] The tool setting instrument is used to obtain the milling cutter coordinates before replacement during the first tool setting and to obtain the milling cutter coordinates after replacement during the second tool setting, and to compensate the milling coordinates based on the difference between the milling cutter coordinates before replacement and the milling cutter coordinates after replacement.

[0019] The motion mechanism further includes a plurality of milling coordinate acquisition mechanisms; one milling coordinate acquisition mechanism is correspondingly provided on each of the milling spindles;

[0020] The motion mechanism is also used to drive the milling coordinate acquisition mechanism to address the welding point before welding point milling to obtain the milling coordinates.

[0021] The motion mechanism includes an X-axis linear module, which is a multi-moving element linear module. Each moving element of the X-axis linear module is provided with a Y-axis linear module, and the moving element of the Y-axis linear module is provided with a Z-axis linear module. The milling spindle is installed on the moving element of the Z-axis linear module.

[0022] The fixing mechanism includes a fixing base plate and a long side centering cylinder and a short side centering cylinder arranged on the fixing base plate;

[0023] The long side centering cylinder is used to center the long side of the battery module when its actuating end is extended;

[0024] The short side centering cylinder is used to center the short side of the battery module when its action end is extended.

[0025] The conveying mechanism includes a roller conveyor line;

[0026] A plurality of positioning grooves are provided on the lower surface of the fixed bottom plate, and the fixing mechanism further comprises a pressing plate, a top plate, and a lifting cylinder. The pressing plate spans above the roller conveyor line, and a contoured end surface is provided at the bottom of the pressing plate. The pressing plate is contoured with the busbar, and the top plate is located below the roller conveyor line. The lifting cylinder is vertically installed on the roller conveyor line, and the action end of the lifting cylinder is connected to the top plate. A plurality of positioning posts are vertically provided on the top plate, and the positioning posts can be inserted and matched with the positioning grooves;

[0027] The lifting cylinder is used to drive the top plate upward when its action end is extended, and to insert the positioning column into the positioning groove from the roller gap of the roller conveyor line, thereby lifting the fixed bottom plate upward until the busbar on the top of the battery module is in contact with the clamping plate.

[0028] The blocking mechanism includes a blocking cylinder and a block, wherein the blocking cylinder is vertically mounted on the roller conveyor line, and the action end of the blocking cylinder is connected to the block;

[0029] The blocking cylinder is used to drive the block to pass through the roller gap of the roller conveyor line and move upward to the top of the roller conveyor line when the action end thereof is extended;

[0030] The stopper is used to stop the fixing mechanism by contacting the fixing mechanism after moving upward to above the roller conveyor line.

[0031] A smoke detector is installed on the fixed base plate or the milling spindle.

[0032] The milling system further comprises a supporting column, the motion mechanism is mounted on the supporting column, and the supporting column is made of marble.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] The utility model discloses a battery module busbar milling system, comprising a conveying mechanism, a fixing mechanism, and a milling station. The fixing mechanism is used to fix the battery module, the conveying mechanism is used to convey the fixing mechanism with the battery module fixed thereon, and the milling station includes a motion mechanism and multiple milling spindles arranged on the motion mechanism. The milling spindles are used to install milling cutters for milling welds, and the motion mechanism is used to drive the multiple milling spindles to alternately mill welds on the same battery module according to pre-acquired milling coordinates. By alternately milling welds with multiple milling spindles, the milling system can reduce equipment idle time and improve milling efficiency while meeting the milling spindle tool change and tool setting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a top view of the utility model.

[0036] Figure 2 It is a side view of the present utility model.

[0037] Figure 3 It is a structural schematic diagram of the blocking mechanism in the utility model.

[0038] Figure 4 This is a schematic diagram of the assembly of the lifting cylinder and the roller conveyor line in the utility model.

[0039] Figure 5 It is a structural schematic diagram of the compression plate in the utility model.

[0040] Figure 6 It is a structural schematic diagram of the fixing mechanism in the utility model.

[0041] In the above figure, 1. Conveying mechanism; 11. Roller conveyor line; 2. Fixing mechanism; 21. Fixed base plate; 22. Long side centering cylinder; 23. Short side centering cylinder; 24. Pressing plate; 25. Top plate; 251. Positioning column; 26. Lifting cylinder; 3. Milling station; 31. Moving mechanism; 311. X-axis linear module; 312. Y-axis linear module; 313. Z-axis linear module; 32. Milling spindle; 33. Milling coordinate acquisition mechanism; 4. Blocking mechanism; 41. Blocking cylinder; 42. Block; 5. Fire water tank; 6. Tool magazine; 7. Tool setting instrument; 8. Support column; 9. Battery module. DETAILED DESCRIPTION

[0042] The present invention is further described below in detail with reference to specific embodiments and accompanying drawings. It should be understood that the embodiments described herein are merely a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0043] It should be noted that, in this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication with each other; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements, unless otherwise expressly specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0044] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0045] Figure 1 A preferred embodiment of the present invention is given, as shown in FIG. Figure 1 As shown, a battery module bus milling system includes a conveying mechanism 1, a fixing mechanism 2, and a milling station 3; the fixing mechanism 2 is used to fix the battery module 9, and the conveying mechanism 1 is used to transport the fixing mechanism 2 with the battery module 9 fixed thereon from back to front; the milling station 3 includes a moving mechanism 31 and a milling spindle 32; the milling spindle is used to install a milling cutter for weld milling, and the milling cutter is used to mill the welds of the battery module 9; the moving mechanism drives multiple milling spindles to perform weld milling on the same battery module 9 in turn according to the pre-acquired milling coordinates; weld milling refers to milling the welds between the cell poles and the bus in the battery module 9 until the bus can be removed.

[0046] When a milling spindle has finished milling and needs to change tools and set tools, the other milling spindles that have already changed tools and set tools can take over the milling spindle that needs tool change and continue to mill weld spots; thereby significantly shortening the equipment idle time and improving milling efficiency.

[0047] Further, such as Figure 2 As shown, the milling system also includes a blocking mechanism 4 and a fire water tank 5; the blocking mechanism 4 is arranged in front of the milling station 3 along the conveying direction of the conveying mechanism 1. When the fixing mechanism 2 moves to the bottom of the milling station 3, the fixing mechanism 2 is stopped by the blocking mechanism 4, and the conveying mechanism 1 stops conveying at the same time, so as to perform the weld milling operation; if it is found that the battery module 9 catches fire during the weld milling operation, the blocking mechanism 4 releases the fixing mechanism 2, the milling station 3 stops the milling operation, and the conveying mechanism 1 continues to convey the fixing mechanism 2 forward. The battery module 9 and the fixing mechanism 2 are quickly discharged along the conveying mechanism 1 as a whole, and the fire water tank 5 is arranged at the discharge end of the conveying mechanism 1 to receive the battery module 9 on fire; the fire water tank 5 is filled with any solid material or liquid material that can extinguish the fire of the battery module 9 and prevent explosion, and this embodiment does not limit this.

[0048] The fixing mechanism 2 and milling station 3 are designed as separate units, and a blocking mechanism 4 is designed to work in conjunction with the fixing mechanism 2. When a battery module 9 catches fire, the blocking mechanism 4 releases the fixing mechanism 2. The battery module 9 and the fixing mechanism 2 are then lowered into the fire water tank 5 as a whole, thus ensuring production safety. Compared to the traditional integrated structure of the battery module clamping device and milling device, this split design reduces the movement required to remove the battery module 9, allowing for faster removal of the burning battery module 9, thereby extinguishing the fire more quickly and preventing the spread of the fire.

[0049] In order to improve the production rhythm, the conveying mechanism 1 adopts a multi-channel form, including at least two roller conveyor lines 11; alternating loading of different channels can effectively reduce the window period of waiting for incoming materials and maximize production efficiency; the transmission direction of the roller conveyor line 11 can be flexibly controlled by the electronic control program to meet the forward and reverse direction transportation of the product; considering the diversity of battery module products on the market, the compatibility requirements of the milling system are relatively high, and two or more channels can be merged to jointly load larger battery module products, thereby meeting the disassembly requirements of the busbars of large-size battery module products; a larger-sized fixing mechanism 2 can be used to load large-size battery module products.

[0050] Preferably, in this embodiment, the number of roller conveyor lines 11 and milling spindles 32 is set to two, and the milling spindle 32 is selected from a precision engraving machine spindle. The precision engraving machine spindle has the characteristics of high speed, high precision, small size and light weight, and can meet the high processing requirements of milling the weld points of the battery module 9;

[0051] The motion mechanism 3 has a simultaneous working mode and a collaborative working mode. In the simultaneous working mode, the motion mechanism 3 drives multiple milling spindles 32 to simultaneously mill the weld points of battery modules 9 on different roller conveyor lines 11 according to the milling coordinates. In the collaborative working mode, the motion mechanism 3 drives multiple milling spindles 32 to collaboratively process multiple parts of the battery modules 9 on the same roller conveyor line 11. Flexible selection of working modes based on different processing requirements allows more products to be processed per unit time, thereby improving machine tool utilization and production cycle time. The system can adapt to a variety of processing tasks, especially for urgent production orders or adjustments to production plans, allowing for faster responses.

[0052] Further, such as Figure 1As shown, the milling system also includes a tool magazine 6 and a tool setting instrument 7. The tool magazine 6 is used to store milling cutters to be replaced. The tool storage capacity of the tool magazine 6 is about 8-20. A servo motor is provided at the bottom of the tool magazine 6. The servo motor rotates to ensure that the new milling cutter can rotate to the origin position after each tool change and wait for the next tool change. The tool setting instrument 7 is a contact tool setting instrument. After each milling operation, the contact tool setting instrument determines the degree of wear of the tool on the milling spindle 32. When the tool wear value exceeds a preset safety value, it is determined that a tool change is required, or a tool change is performed regularly, thereby minimizing the risk of tool breakage and increasing the tool life.

[0053] When changing the tool, the motion mechanism 31 drives the milling spindle 32 that needs to change the tool to move to the tool setting instrument 7 for the first tool setting, then moves to the tool magazine 6 for tool change, and then moves to the tool setting instrument 7 for the second tool setting; the tool setting instrument 7 obtains the milling cutter coordinates (X1, Y1, Z1) before the change during the first tool setting and obtains the milling cutter coordinates (X2, Y2, Z2) after the change during the second tool setting, and makes a difference between the milling cutter coordinates (X1, Y1, Z1) before the change and the milling cutter coordinates (X2, Y2, Z2) after the change to obtain the difference (ΔX, ΔY, ΔZ), and compensates the difference (ΔX, ΔY, ΔZ) to the milling coordinates to ensure milling accuracy;

[0054] Since tool changing and tool setting are the main parts that occupy efficiency in the equipment production process, in order to improve production efficiency, when one of the milling spindles 32 completes milling and is undergoing tool changing and tool setting, other milling spindles 32 can take over the milling action. The alternating action of multiple milling spindles 32 can significantly improve the overall working efficiency of the equipment.

[0055] Further, such as Figure 1 As shown, the milling station 3 also includes multiple milling coordinate acquisition mechanisms 33; a milling coordinate acquisition mechanism 33 is correspondingly set on each milling spindle 32; the motion mechanism 31 drives the milling coordinate acquisition mechanism 33 to address the weld point before milling to obtain the milling coordinates.

[0056] The milling coordinate acquisition mechanism 33 includes a visual positioning system and a distance measurement system. The visual positioning system photographs and addresses the battery module 9 point by point. After addressing, milling is performed point by point based on the milling coordinates obtained by the visual positioning system. However, since the waste battery module may be slightly deformed after recycling, in order to ensure the consistency of the height of the battery cell pole after milling, the distance measurement sensor synchronously measures the height of the battery cell pole, and uses the distance measurement result to compensate for the milling cutter height (i.e., the Z-axis height). The compensation can ensure the consistency of the height of the battery cell pole after milling.

[0057] Further, such as Figure 1As shown, the motion mechanism 31 includes an X-axis linear module 311, which is a multi-moving element linear module. Each moving element of the X-axis linear module 311 is provided with a Y-axis linear module 312, and the moving element of the Y-axis linear module 312 is provided with a Z-axis linear module 313. The milling spindle 32 is installed on the moving element of the Z-axis linear module 313.

[0058] Further, such as Figure 6 As shown, the fixing mechanism 2 includes a fixing base plate 21 and a long side centering cylinder 22 and a short side centering cylinder 23 provided on the fixing base plate 21. The action end of the long side centering cylinder 22 is extended to center the long side of the battery module 9, and the action end of the short side centering cylinder 23 is extended to center the short side of the battery module 9, thereby achieving the overall centering of the battery module 9.

[0059] Further, such as Figure 4 、 Figure 5 As shown, a plurality of positioning grooves are provided on the lower surface of the fixed bottom plate 21, and the fixing mechanism 2 further includes a pressing plate 24, a top plate 25, and a lifting cylinder 26. The pressing plate 24 spans above the roller conveyor line 11, and both sides of the pressing plate 24 are fixedly connected to two brackets provided on both sides of the roller conveyor line 11; the top plate 25 is located below the roller conveyor line 11, and the lifting cylinder 26 is vertically installed on the roller conveyor line 11, and the action end of the lifting cylinder 26 is connected to the top plate 25, and a plurality of positioning columns 251 are vertically provided on the top plate 25;

[0060] The clamping plate 24 is designed to imitate the bus and is used to compress the battery module 9 during the milling process; when the fixing mechanism 2 moves to the bottom of the milling station 3, the blocking mechanism stops the fixing mechanism 2, and then the action end of the lifting cylinder 26 extends, driving the top plate 25 to move upward and inserting the positioning column 251 from the roller gap of the roller conveyor line 11 into the positioning groove, and then continues to lift the fixed bottom plate 21 upward until the bus is in close contact with the clamping plate 24, preventing the kinetic energy of the milling cutter from carrying the cutting chips away or causing the cutter to break, causing damage to equipment and personnel; the clamping plate 24 is made of non-metallic fireproof material, and non-metal has good insulation function, which can effectively avoid short circuit caused by the battery module 9 being compressed; specifically, glass fiber is selected, which has the ability to be fireproof and high-temperature resistant, and can effectively prevent the clamping plate 24 from catching fire or melting after contacting with high-temperature cutting chips.

[0061] Further, such as Figure 3 As shown, the blocking mechanism 4 includes a mounting plate, a blocking cylinder 41, and a block 42. The mounting plate is mounted on the roller conveyor line 11. The blocking cylinder 41 is vertically mounted on the bottom surface of the mounting plate. The actuating end of the blocking cylinder 41 is connected to the block 42. A through hole is provided on the mounting plate for the block 42 to pass through.

[0062] When the fixing mechanism 2 moves to the bottom of the milling station 3, the roller conveyor line 11 is stopped by manual or program control, and the action ends of the blocking cylinder 41 and the lifting cylinder 26 are extended. The action end of the blocking cylinder 41 is extended to drive the stopper 42 to pass through the roller gap and the through hole of the roller conveyor line 11 and move up to the top of the roller conveyor line 11. The stopper 42 is engaged with the slot opened on the side of the fixed base plate 21 to stop the fixed base plate 21. After stopping, the action end of the lifting cylinder 26 is extended to press the battery module 9 through the pressing plate 24. After pressing, the milling spindle 32 starts welding point milling. Cutting operation; when the battery module 9 catches fire during the welding point milling operation, the roller conveyor line 11 is manually or program-controlled to continue conveying, the blocking cylinder 41 and the action end of the lifting cylinder 26 are retracted, and the milling spindle 32 stops operating. The action end of the blocking cylinder 41 is retracted so that the stopper 42 is no longer engaged with the card slot on the side of the fixed base plate 21, and the fixing mechanism 2 is released. The action end of the lifting cylinder 26 is retracted so that the pressing plate 24 releases the battery module 9, and the roller conveyor line 11 continues to convey the fixing mechanism 2 forward, and the fixing mechanism 2 carries the burning battery module 9 into the fire water tank 5;

[0063] The program controls the roller conveyor line 11 to stop conveying and the action ends of the blocking cylinder 41 and the lifting cylinder 26 to extend, which means that a displacement detector is set on the top surface of the mounting plate. When the displacement detector detects that the fixing mechanism 2 is approaching, a control signal is sent to the roller conveyor line 11 and the blocking cylinder 41 and the lifting cylinder 26. The roller conveyor line 11 stops running after receiving the control signal. The blocking cylinder 41 controls its action end to extend after receiving the control signal, thereby stopping the fixing mechanism 2. The lifting cylinder 26 controls its action end to extend after receiving the control signal, thereby pressing the battery module 9 through the clamping plate 24.

[0064] Furthermore, a smoke detector is installed on the fixed base plate 21 or the milling spindle 32; the smoke detector is linked to the fire-fighting equipment. Once the smoke detector detects smoke generated by the fire, the fire-fighting equipment such as the sprinkler system, ventilation system, etc. is quickly triggered to prevent the fire from spreading further.

[0065] The program controls the roller conveyor line 11 to continue conveying, the action ends of the blocking cylinder 41 and the lifting cylinder 26 to retract, and the milling spindle 32 to stop operating. This means that when the smoke detector detects smoke generated by a fire, a fire signal is sent to the roller conveyor line 11, the blocking cylinder 41, the lifting cylinder 26, and the milling spindle 32. The roller conveyor line 11 starts running after receiving the fire signal. The blocking cylinder 41 controls its action end to retract after receiving the fire signal, and releases the fixing mechanism 2. The lifting cylinder 26 controls its action end to retract after receiving the fire signal, and releases the battery module 9. The milling spindle 32 stops milling after receiving the fire signal.

[0066] Further, such as Figure 2As shown, the milling system also includes a mounting platform and multiple supporting columns 8. The motion mechanism 31 is mounted on the mounting platform through the multiple supporting columns 8. The supporting columns 8 are made of marble. The advantage of using marble columns instead of conventional Q235 square steel pipe columns is that: since milling operations will generate severe vibrations, marble has good shock absorption capabilities, which can effectively reduce the vibration transmission generated during equipment operation, avoid the adverse effects of vibration on equipment performance and processing quality, and marble has minimal deformation during long-term use, which can provide more stable and precise support for the equipment, ensuring the accuracy and reliability of measurement and milling.

[0067] The milling system of the present invention, on the one hand, completes the preventive control before the fire by the clamping plate 24, the tool magazine 6, and the tool setting instrument 7; on the other hand, completes the fire extinguishing control after the fire by the smoke detector, the blocking mechanism 4, and the fire water tank 5. The double-layer control forms a closed loop, thereby realizing the fire prevention and control during the milling operation.

Claims

1. A battery module busbar milling system, characterized by: The milling system comprises a conveying mechanism (1), a fixing mechanism (2), and a milling station (3); The fixing mechanism (2) is used to fix the battery module (9); The conveying mechanism (1) is used to convey the fixing mechanism (2) on which the battery module (9) is fixed; The milling station (3) comprises a motion mechanism (31) and a plurality of milling spindles (32), wherein the plurality of milling spindles (32) are all arranged on the motion mechanism (31); The milling spindle (32) is used to install a milling cutter for milling weld points; The motion mechanism (31) is used to drive the plurality of milling spindles (32) to perform welding point milling on the same battery module (9) in rotation according to pre-acquired milling coordinates.

2. A battery module busbar milling system according to claim 1, characterized in that: The milling system further includes a blocking mechanism (4) and a fire water tank (5); The blocking mechanism (4) is arranged behind the milling station (3) along the conveying direction of the conveying mechanism (1), and is used to stop the fixing mechanism (2) below the milling station (3) and release the fixing mechanism (2) when the battery module (9) catches fire; The fire water tank (5) is arranged at the discharge end of the conveying mechanism (1).

3. The battery module busbar milling system according to claim 1, characterized in that: The milling system further includes a tool magazine (6) and a tool setting instrument (7); The tool magazine (6) is used to store milling cutters to be replaced; The motion mechanism (31) is also used to drive the milling spindle (32) that needs to change the tool to first move to the tool setting instrument (7) for the first tool setting, then move to the tool magazine (6) for tool change, and then move to the tool setting instrument (7) for the second tool setting; The tool setting instrument (7) is used to obtain the coordinates of the milling cutter before replacement during the first tool setting and to obtain the coordinates of the milling cutter after replacement during the second tool setting, and to compensate the milling coordinates based on the difference between the coordinates of the milling cutter before replacement and the coordinates of the milling cutter after replacement.

4. The battery module busbar milling system according to claim 3, characterized in that: The milling station (3) further includes a plurality of milling coordinate acquisition mechanisms (33); one milling coordinate acquisition mechanism (33) is correspondingly provided on each of the milling spindles (32); The motion mechanism (31) is also used to drive the milling coordinate acquisition mechanism (33) to address the weld point before the weld point is milled, so as to obtain the milling coordinates.

5. The battery module busbar milling system according to claim 2, characterized in that: The motion mechanism (31) includes an X-axis linear module (311), the X-axis linear module (311) is a multi-moving element linear module, each moving element of the X-axis linear module (311) is provided with a Y-axis linear module (312), the moving element of the Y-axis linear module (312) is provided with a Z-axis linear module (313), and the milling spindle (32) is mounted on the moving element of the Z-axis linear module (313).

6. The battery module busbar milling system according to claim 2, characterized in that: The fixing mechanism (2) comprises a fixing base plate (21) and a long side centering cylinder (22) and a short side centering cylinder (23) arranged on the fixing base plate (21); The long side centering cylinder (22) is used to center the long side of the battery module (9) when its actuating end is extended; The short side centering cylinder (23) is used to center the short side of the battery module (9) when its action end is extended.

7. The battery module busbar milling system according to claim 6, characterized in that: The conveying mechanism (1) comprises a roller conveying line (11); A plurality of positioning grooves are provided on the lower surface of the fixed bottom plate (21), and the fixing mechanism (2) further comprises a pressing plate (24), a top plate (25), and a lifting cylinder (26). The pressing plate (24) spans above the roller conveyor line (11), and the pressing plate (24) is obtained by imitating the bus bar. The top plate (25) is located below the roller conveyor line (11), and the lifting cylinder (26) is vertically installed on the roller conveyor line (11). The action end of the lifting cylinder (26) is connected to the top plate (25), and a plurality of positioning columns (251) are vertically provided on the top plate (25), and the positioning columns (251) can be inserted into and matched with the positioning grooves. The lifting cylinder (26) is used to drive the top plate (25) to move upward and insert the positioning column (251) into the positioning groove from the roller gap of the roller conveyor line (11) when its action end is extended, thereby lifting the fixed bottom plate (21) upward until the bus bar is in contact with the pressing plate (24).

8. The battery module busbar milling system according to claim 7, characterized in that: The blocking mechanism (4) comprises a blocking cylinder (41) and a blocking block (42); the blocking cylinder (41) is vertically mounted on the roller conveyor line (11); and the action end of the blocking cylinder (41) is connected to the blocking block (42); The blocking cylinder (41) is used to drive the blocking block (42) to pass through the roller gap of the roller conveyor line (11) and move upward to above the roller conveyor line (11) when its action end is extended; The stopper (42) is used to stop the fixing mechanism (2) by contacting the fixing mechanism (2) after moving upward to above the roller conveyor line (11).

9. The battery module busbar milling system according to claim 6, characterized in that: A smoke detector is installed on the fixed base plate (21) or the milling spindle (32).

10. The battery module busbar milling system according to claim 2, characterized in that: The milling system further comprises a supporting column (8), the motion mechanism (31) is mounted on the supporting column (8), and the supporting column (8) is made of marble.

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