Square shell and blade battery module chip milling equipment

Abstract

The invention relates to square shell and blade battery module chip milling equipment which comprises a KBK crane, a lifting appliance and a milling machine, the KBK crane is installed at the front end of the milling machine, and the lifting appliance is installed on the KBK crane; and a product pre-positioning and arranging mechanism is arranged below the KBK crane at the front end of the milling machine. The equipment portal frame structure is matched with the angle swing design, is compatible with disassembly of various battery cell modules, is suitable for disassembling diversified product types in the industry, is high in compatibility, and reduces the equipment number investment.

Description

Technical Field

[0001] The present invention relates to the technical field related to the processing of lithium batteries, and particularly to a square shell and blade battery module tab milling device. Background Art

[0002] Lithium batteries are increasingly used in various industries. Prominent fields include new energy vehicles and industrial and commercial energy storage stations. However, after the service life of lithium batteries expires, they need to be properly processed to avoid environmental pollution. When the power packs of new energy vehicles and the energy storage packs of energy storage stations reach the end of their service life, they need to be disassembled, recycled, and reused. Currently, the new energy industry is developing rapidly, and a huge number of packs need to be disassembled currently and in the future.

[0003] Currently, most disassembly methods are to first remove the modules from the pack, and then manually use a grinding head or a cutting machine to remove the module tabs. This solution consumes manpower and pollutes the environment. After grinding, the accuracy of the pole surface is poor, and heat generation will damage the battery cells, affecting the recycling and secondary utilization. The efficiency of manually processing module tabs is relatively low, and the cost is relatively high.

[0004] In view of the above defects, the inventor actively conducts research and innovation in order to create a square shell and blade battery module tab milling device, making it more valuable in the industry. Summary of the Invention

[0005] To solve any of the above technical problems, the purpose of the present invention is to provide a square shell and blade battery module tab milling device.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The square shell and blade battery module tab milling device includes a KBK overhead crane, a lifting tool, and a milling machine. The KBK overhead crane is installed at the front end of the milling machine, and the lifting tool is installed on the KBK overhead crane;

[0008] A product pre-positioning and regularizing mechanism is arranged below the KBK overhead crane at the front end of the milling machine;

[0009] The milling machine includes a milling gantry component, a sliding table, and a bed. The sliding table that moves back and forth is installed on the bed, and the milling gantry component is installed in the middle of the bed. The milling gantry component includes a gantry installed on the bed. A lead screw module and a lead screw motor are installed on the top of the gantry. The lead screw module drives the Z-axis module and the Z-axis motor to move in the left-right direction. The Z-axis module drives the high-precision turntable below to move in the vertical direction, and the high-precision turntable drives the milling head component to rotate;

[0010] The product pre-positioning and rectifying mechanism includes an offline tooling and a sub-tray. A left push plate and a right push plate are respectively installed on the left and right sides of the offline tooling. The pressing servo motor installed on the offline tooling drives the inner left push plate or right push plate to move in the left-right direction. The sub-tray is located on the offline tooling between the left push plate and the right push plate.

[0011] As a further improvement of the present invention, a safety room is installed outside the milling machine, an independent electric control cabinet is installed on one side of the KBK crane, a milling machine distribution electric control cabinet, a dust collector and a spindle chiller are installed on one side of the safety room, a dust extraction port is installed on the top of the safety room, and an isolation fence is installed between the milling machine and the product pre-positioning and rectifying mechanism.

[0012] As a further improvement of the present invention, a plurality of zero-point positioning systems are installed on the sliding table, and a plurality of pull studs adapted to the above zero-point positioning systems are installed at the bottom of the sub-tray.

[0013] As a further improvement of the present invention, a tool magazine is provided on one side of the bed body. The tool magazine includes a tool servo module installed on a tool magazine bracket, a tool dust-proof cover is installed outside the tool servo module, the tool servo module drives a plurality of tools and an automatic tool setter to move in the front-rear direction, and the plurality of tools are respectively installed on the tool servo module through elastic tool holders.

[0014] As a further improvement of the present invention, bellows covers are installed on the outer sides of the lead screw module and the Z-axis module.

[0015] As a further improvement of the present invention, the milling head assembly includes a box body installed on a high-precision turntable. An electric spindle is installed in the box body. An automatic tool release cylinder is installed on the first side of the electric spindle. The tool holder is installed on the second side of the electric spindle, and a milling cutter is installed on the tool holder.

[0016] As a further improvement of the present invention, a camera mounting plate is installed on the box body, and a 2D camera, a light source and a 3D camera are installed on the camera mounting plate.

[0017] As a further improvement of the present invention, a plurality of limit frames are evenly distributed on the sub-tray.

[0018] By means of the above solutions, the present invention has at least the following advantages:

[0019] The equipment of the present invention has a gantry structure with an angle swing design, is compatible with the disassembly of a variety of battery cell modules, is suitable for diversified product types in the disassembly industry, has high compatibility, and reduces the input of equipment quantity.

[0020] The present invention can first roughly mill to remove the tab, and then finely mill the pole column surface, ensuring good roughness of the pole column surface and improving the cycle utilization rate of the battery cell.

[0021] The present invention can accurately control the rotation speed and the walking speed, prevent severe heating of the pole surface, reduce the damage to the battery cells caused by high temperature, and improve the qualification rate.

[0022] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines the accompanying drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a square shell and blade battery module bar milling device of the present invention;

[0025] Figure 2 is Figure 1 a schematic structural diagram of the milling machine in;

[0026] Figure 3 is Figure 1 a schematic structural diagram of the milling gantry assembly in;

[0027] Figure 4 is Figure 3 a partial enlarged structural diagram of part A in;

[0028] Figure 5 is Figure 2 a schematic structural diagram of the tool magazine in;

[0029] Figure 6 is Figure 1 a schematic structural diagram of the product pre-positioning and regularization mechanism in;

[0030] Figure 7 is Figure 6 a schematic structural diagram of the other side in;

[0031] Figure 8 It is a schematic diagram of the bar processing of the square shell on the upper surface of the square shell module of the present invention;

[0032] Figure 9 It is a schematic diagram of the bar processing of the blade module on both sides of the blade module of the present invention.

[0033] Among them, the meanings of the reference numerals in the drawings are as follows.

[0034] Safety room 1, KBK overhead crane 2, lifting appliance 3, product pre-positioning and rectifying mechanism 4, independent electric control cabinet 5, electric control cabinet for milling machine 6, dust collector 7, spindle chiller 8, milling machine 9, isolation fence 10, dust extraction port 11, milling gantry assembly 12, sliding table 13, zero-point positioning system 130, bed body 14, tool magazine 15, bellows cover 16, lead screw module 17, lead screw motor 18, gantry 19, Z-axis module 20, automatic tool loosening cylinder 21, 2D camera 22, light source 23, 3D camera 24, electric spindle 25, tool holder 26, milling cutter 27, box body 28, high-precision turntable 29, camera mounting plate 30, Z-axis motor 31, cutting tool 32, automatic tool setter 33, tool servo module 34, tool dust cover 35, tool magazine support 36, elastic tool holder 37, left push plate 38, offline tooling 39, sub-pallet 40, limit frame 41, right push plate 42, pressing servo motor 43, pull stud 44, square shell processing fixture 45, blade module processing fixture 46. Detailed implementation manners

[0035] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners 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.

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0037] As Figures 1 to 9 shown, a square shell and blade battery module fixture milling equipment includes a KBK overhead crane 2, a lifting appliance 3 and a milling machine 9. A KBK overhead crane 2 is installed at the front end of the milling machine 9, and a lifting appliance 3 is installed on the KBK overhead crane 2. A product pre-positioning and rectifying mechanism 4 is provided below the KBK overhead crane 2 at the front end of the milling machine 9.

[0038] The milling machine 9 includes a milling gantry assembly 12, a slide table 13, and a machine bed 14. The slide table 13 that moves back and forth is installed on the machine bed 14, and the milling gantry assembly 12 is installed in the middle of the machine bed 14. The milling gantry assembly 12 includes a gantry 19 installed on the machine bed 14. A lead screw module 17 and a lead screw motor 18 are installed on the top of the gantry 19. The lead screw module 17 drives the Z-axis module 20 and the Z-axis motor 31 to move in the left-right direction. The Z-axis module 20 drives the high-precision turntable 29 below to move in the vertical direction, and the high-precision turntable 29 drives the milling head assembly to rotate.

[0039] Bellows covers 16 are installed on the outer sides of both the lead screw module 17 and the Z-axis module 20.

[0040] A safety house 1 is installed on the outer side of the milling machine 9. An independent electric control cabinet 5 is installed on one side of the KBK overhead crane 2. A milling machine distribution electric control cabinet 6, a dust collector 7, and a spindle chiller 8 are installed on one side of the safety house 1. A dust extraction port 11 is installed on the top of the safety house 1. An isolation fence 10 is installed between the milling machine 9 and the product pre-positioning and rectifying mechanism 4.

[0041] The product pre-positioning and rectifying mechanism 4 includes an offline tooling 39 and a sub-tray 40. A left push plate 38 and a right push plate 42 are respectively installed on the left and right sides of the offline tooling 39. The pressing servo motor 43 installed on the offline tooling 39 drives the inner left push plate 38 or right push plate 42 to move in the left-right direction. The sub-tray 40 is located on the offline tooling 39 between the left push plate 38 and the right push plate 42. A number of limit frames 41 are evenly distributed on the sub-tray 40.

[0042] A number of zero-point positioning systems 130 are installed on the slide table 13, and a number of pull studs 44 adapted to the above zero-point positioning systems 130 are installed at the bottom of the sub-tray 40.

[0043] A tool magazine 15 is arranged on one side of the machine bed 14. The tool magazine 15 includes a tool servo module 34 installed on a tool magazine bracket 36. A tool dust-proof cover 35 is installed on the outer side of the tool servo module 34. The tool servo module 34 drives a number of tools 32 and an automatic tool setter 33 to move in the front-back direction. The number of tools 32 are respectively installed on the tool servo module 34 through elastic tool holders 37.

[0044] The milling head assembly includes a box body 28 installed on the high-precision turntable 29. An electric spindle 25 is installed in the box body 28. An automatic tool loosening cylinder 21 is installed on the first side of the electric spindle 25. A tool holder 26 is installed on the second side of the electric spindle 25, and a milling cutter 27 is installed on the tool holder 26. A camera mounting plate 30 is installed on the box body 28, and a 2D camera 22, a light source 23, and a 3D camera 24 are installed on the camera mounting plate 30.

[0045] The first embodiment of the present invention:

[0046] As Figure 8 and 9 shown in the schematic diagram of the processing positions of the square shell module and the long and short blade modules, the pole of the square shell battery cell module (i.e., the square shell processing tab 45) faces upward, and the pole of the blade battery cell module (i.e., the blade module processing tab 46) faces two sides. In order to enable the product to be compatible with processing simultaneously and reduce the number of product clamping and hoisting operations, a swingable processing head is designed. In cooperation with the zero-point positioning system, efficient tool change and one-time clamping can process two sides, reducing the number of product clamping operations and greatly improving production efficiency and processing accuracy.

[0047] As Figure 1 shown in the general assembly drawing of the milling equipment, aluminum dust is generated during processing. A closed safety room 1 is equipped in the equipment processing area. The top of the safety room 1 is provided with a dust extraction port 11. The product is loaded and unloaded by the KBK overhead crane 2 combined with the lifting tool 3. The workbench of the processing equipment adopts a sliding table type. After the product is loaded onto the sliding table 13, it can automatically slide into the safety room 1 for processing. After processing is completed, the sliding table 13 automatically slides out of the safety room 1, and the operator uses the KBK overhead crane 2 for unloading and loading. In order to improve the loading and unloading clamping efficiency, a set of product pre-positioning and rectifying mechanism 4 is designed offline, equipped with an independent electric control cabinet 5, a milling machine power distribution control cabinet 6, a dust collector purifier 7, and a spindle chiller 8. In Figure 2 , the front end of the milling gantry assembly 12 (i.e., the side facing the product pre-positioning and rectifying mechanism 4) is station one, which is an external loading and unloading area with an open design above; the milling gantry assembly 12 is station two, which is a milling processing area, equipped with a closed safety room 1 to prevent aluminum dust from polluting the environment. The top dust extraction port 11 is connected to the dust collector purifier 7 to prevent the concentration of aluminum dust in the safety room from being too high and causing an explosion.

[0048] As Figure 2 shown in the schematic diagram of the overall components of the milling machine, there are three linear motion axes and one spindle angle rotation axis. The composition of the milling machine: The milling gantry assembly 12 is installed on the bed 14, the sliding table 13 is installed on the bed 14, a simple tool magazine 15 is installed on the bed 14, and the zero-point positioning system 130 is installed on the sliding table 13.

[0049] As Figure 3 and Figure 4Schematic diagram of the gantry assembly 12 of the shown milling machine. The bellows cover 16 is installed on the gantry 19 to protect the guide rail from dust. The Z-axis module 20 is driven horizontally by the lead screw module 17 and the lead screw motor 18 together. The milling cutter 27 is installed on the BT30 tool holder 26 by a center pull stud mechanism. The BT30 tool holder 26 is installed on the electric spindle 25 by a pneumatic tool puller mechanism. The automatic tool release cylinder 21 is installed at the tail of the electric spindle 25. The electric spindle 25 is installed on the box body 28, and the box body 28 is installed on the high-precision turntable 29. The machining position vision addressing system uses a 2D camera 22 and a light source 23. The machining allowance measurement is guided by a 3D line scan camera 24. The 2D camera 22, the light source 23, and the 3D camera 24 are all installed on the camera mounting plate 30, and the camera mounting plate 30 is installed on the box body 28.

[0050] As Figure 5 Schematic diagram of the tool magazine and tool setter of the shown milling machine. The tool servo module 34 is installed on the tool magazine bracket 36 by screws. The tool dust cover 35 is installed on the tool magazine bracket 36 to prevent aluminum chips from falling on the tools during machining. The tool magazine can install 3 tools 32. The tools 32 are installed on the elastic tool holders 37. The automatic tool setter 33 is installed on the tool servo module 34. The elastic tool holders 37 are installed on the tool servo module 34. The tools 32 and the automatic tool setter 33 move through the tool servo module 34 to match the tool change position of the electric spindle 25. After the tool change is completed, the automatic tool setter 32 and the tools 32 automatically move back into the dust cover.

[0051] As Figure 6 and Figure 7 Schematic diagram of the offline assembly and alignment tooling. 6 pull studs 44 are installed at the bottom of the sub-tray 40. The pull studs 44 cooperate with the zero-point positioning system 130 on the slide table 13 to realize the quick change of the sub-tray. The 45 milling surface and the 46 milling surface indicate the machining positions. The sub-tray 40 is installed on the offline tooling 39 by a zero-point positioning system. When installing the blade battery, a centering and alignment mechanism, the left push plate 38 and the right push plate 42, are required. The left push plate 38 and the right push plate 42 are driven by a clamping servo motor 43. The internal mechanism uses a left-handed and right-handed ball screw to realize centering, clamping, and alignment. The product is clamped by the clamping mechanism 42.

[0052] After the equipment is started, the operator uses the KK overhead crane 2 to load the product at station one, hoisting the sub-tray 40 assembly. After the loading is completed, the slide table 13 drives the sub-tray 40 assembly to slide into the machining area at station two. While the slide table 13 is moving, the equipment vision system scans the chip. The 2D vision fly-by shooting addresses the weld seam, and the 3D vision measures the machining allowance. After the vision scanning is completed, the automatic tool setter of the milling machine rough-machines the chip. After the chip is machined, a secondary vision scan is performed, and the pole surface is finely milled. After the machining is completed, the slide table 13 drives the sub-tray 40 assembly to slide out of the machining area at station two to station one, and the operator unloads the material manually. Then, a set of sub-trays is hoisted from the offline tooling for loading.

[0053] The present invention provides a device for automatically removing the tab on the surface of a lithium battery module. The device adopts an XYZ three-axis linear motion gantry structure. A high-precision rotary table is installed on the Z-axis square ram, and a high-speed electric spindle is installed on the rotary table. The milling cutter can swing at an angle of ±100°. The spindle taper hole is BT30, and a BT30 milling cutter shank is installed. An automatic tool changer magazine is equipped, and an automatic tool setter can automatically detect and compensate for tool wear to ensure machining accuracy. 2D vision flying photography plus 3D vision line scanning is used to address the machining position and guide the machining amount. This structural configuration can be compatible with the milling of the tabs on the left and right sides of module products with long and short blade types, and can also be compatible with the milling of the tab on the upper surface of a square shell battery cell. It improves product compatibility, machining efficiency, and machining accuracy. The flatness of the electrode post surface of the battery cell after milling is high, and the surface roughness can reach 3.2 μm. After milling, the battery cell can be disassembled for secondary use, reducing resource waste and improving the enterprise's benefits. The milling working area is equipped with an enclosed safety room, and the safety room is equipped with a dust suction pipe interface. The dust extraction port is externally connected to an explosion-proof dust collector to prevent the explosion and combustion of aluminum dust during milling.

[0054] The device of the present invention has a gantry structure with an angle swing design, is compatible with the disassembly of various battery cell modules, is suitable for the diversified product types in the disassembly industry, has high compatibility, and reduces the investment in the number of devices. It can first roughly mill to remove the tab, and then finely mill the electrode post surface to ensure good surface roughness of the electrode post, improving the recycling rate of the battery cell. It can accurately control the rotation speed and the walking speed, prevent the electrode post surface from overheating seriously, reduce the damage to the battery cell caused by high temperature, and improve the qualified rate.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0056] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0057] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A square shell and blade battery module chip milling device, comprising a KBK crane (2), a hanger (3) and a milling machine (9), wherein the KBK crane (2) is installed at the front end of the milling machine (9), and the hanger (3) is installed on the KBK crane (2); characterized in that: A product pre-positioning and tidying mechanism (4) is arranged below the KBK crane (2) at the front end of the milling machine (9); The milling machine (9) comprises a milling gantry assembly (12), a slide (13) and a bed (14); a slide (13) which moves forward and backward is installed on the bed (14); a milling gantry assembly (12) is installed in the middle of the bed (14); the milling gantry assembly (12) comprises a gantry (19) installed on the bed (14); a screw module (17) and a screw motor (18) are installed on the top of the gantry (19); the screw module (17) drives a Z-axis module (20) and a Z-axis motor (31) to move in the left and right directions; the Z-axis module (20) drives a high-precision turntable (29) below to move in the vertical direction; and the high-precision turntable (29) drives the milling head assembly to rotate; The product pre-positioning and tidying mechanism (4) comprises an offline tooling (39) and a sub-tray (40), a left push plate (38) and a right push plate (42) are respectively installed on the left and right sides of the offline tooling (39), a pressing servo motor (43) installed on the offline tooling (39) drives the inner left push plate (38) or the right push plate (42) to move in the left and right directions, and the sub-tray (40) is located on the offline tooling (39) between the left push plate (38) and the right push plate (42).

2. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: A safety room (1) is installed on the outside of the milling machine (9), an independent electric control cabinet (5) is installed on one side of the KBK crane (2), a milling machine distribution control cabinet (6), a dust collector (7) and a spindle chiller (8) are installed on one side of the safety room (1), a dust extraction port (11) is installed on the top of the safety room (1), and an isolation fence (10) is installed between the milling machine (9) and the product pre-positioning and tidying mechanism (4).

3. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: A plurality of zero-point positioning systems (130) are installed on the slide (13), and a plurality of pull pins (44) compatible with the zero-point positioning systems (130) are installed on the bottom of the sub-tray (40).

4. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: A tool magazine (15) is arranged on one side of the bed (14), the tool magazine (15) comprising a tool servo module (34) mounted on a tool magazine bracket (36), a tool dust cover (35) being mounted on the outer side of the tool servo module (34), the tool servo module (34) driving a plurality of tools (32) and an automatic tool setting instrument (33) to move in a front-rear direction, and the plurality of tools (32) are respectively mounted on the tool servo module (34) via elastic tool clamps (37).

5. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: A phoenix cover (16) is installed on the outer sides of the screw rod module (17) and the Z-axis module (20).

6. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: The milling head assembly comprises a box (28) mounted on a high-precision turntable (29), an electric spindle (25) is mounted in the box (28), an automatic tool loosening cylinder (21) is mounted on a first side of the electric spindle (25), a tool holder (26) is mounted on a second side of the electric spindle (25), and a milling cutter (27) is mounted on the tool holder (26).

7. The square shell and blade battery module chip milling equipment according to claim 6, characterized in that: A camera mounting plate (30) is mounted on the box (28), and a 2D camera (22), a light source (23) and a 3D camera (24) are mounted on the camera mounting plate (30).

8. The square shell and blade battery module chip milling equipment according to claim 1, characterized in that: A plurality of limiting frames (41) are evenly distributed on the sub-tray (40).

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