Square shell and blade battery module chip milling equipment

Abstract

The utility model 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 mounted at the front end of the milling machine, and the lifting appliance is mounted 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 quantity investment.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery processing, and in particular to a milling equipment for square-shell and blade battery module wafers. Background Technology

[0002] Lithium batteries are being used extensively across various industries, with notable applications including new energy vehicles and industrial and commercial energy storage stations. However, lithium batteries require proper disposal to prevent environmental pollution after their lifespan expires. The power packs in new energy vehicles and the energy storage packs in energy storage stations need to be dismantled, recycled, and reused once they reach the end of their service life. Currently, the development of new energy is rapid, resulting in a massive number of packs that need to be dismantled now and in the future.

[0003] Currently, most disassembly methods involve first removing the module from the pack, and then manually removing the module foil using a grinding head or cutting machine. This method is labor-intensive and pollutes the environment. After grinding, the electrode surface has poor precision, generates heat, and can damage the cell, affecting recycling and reuse. Manually processing the module foil is inefficient and costly.

[0004] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a milling machine for square-shell and blade battery modules, making it more industrially valuable. Utility Model Content

[0005] To solve any of the above-mentioned technical problems, the purpose of this utility model is to provide a square shell and blade battery module chip milling equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

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

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

[0009] The milling machine includes a milling gantry assembly, a slide table, and a bed. A slide table that moves back and forth is mounted on the bed. The milling gantry assembly is mounted in the middle of the bed. The milling gantry assembly includes a gantry mounted on the bed. A lead screw module and a lead screw motor are mounted 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 and right directions. The Z-axis module drives the high-precision rotary table below to move in the vertical direction. The high-precision rotary table drives the milling head assembly to rotate.

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

[0011] As a further improvement of this utility model, a safety room is installed on the outside of the milling machine, an independent electrical control cabinet is installed on one side of the KBK overhead crane, and a milling machine power 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 straightening mechanism.

[0012] As a further improvement of this utility model, several zero-point positioning systems are installed on the slide table, and several pull studs adapted to the above-mentioned zero-point positioning systems are installed on the bottom of the sub-tray.

[0013] As a further improvement of this utility model, a tool magazine is provided on one side of the bed. The tool magazine includes a tool servo module mounted on a tool magazine bracket. A tool dust cover is installed on the outside of the tool servo module. The tool servo module drives several tools and an automatic tool setter to move in the front-back direction. The several tools are respectively mounted on the tool servo module through elastic tool clamps.

[0014] As a further improvement to this utility model, a bell cover is installed on the outer side of both the lead screw module and the Z-axis module.

[0015] As a further improvement of this utility model, the milling head assembly includes a housing mounted on a high-precision turntable, an electric spindle installed inside the housing, an automatic tool release cylinder installed on the first side of the electric spindle, a tool holder installed on the second side of the electric spindle, and a milling cutter installed on the tool holder.

[0016] As a further improvement of this utility model, a camera mounting plate is installed on the housing, and a 2D camera, a light source and a 3D camera are installed on the camera mounting plate.

[0017] As a further improvement of this utility model, several limiting frames are evenly distributed on the sub-tray.

[0018] By means of the above solution, this utility model has at least the following advantages:

[0019] This utility model features a gantry structure with an angle swing design, compatible with the disassembly of various battery cell modules. It is suitable for the diverse product types in the disassembly industry, offering high compatibility and reducing the investment in equipment quantity.

[0020] This invention allows for the rough milling removal of the electrode plates followed by fine milling of the electrode cylindrical surface, ensuring good surface roughness and improving the cell recycling rate.

[0021] This invention can precisely control the rotation speed and travel speed, which can prevent the electrode surface from overheating, reduce the damage of high temperature to the battery cell, and improve the pass rate.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a square shell and blade battery module chip milling equipment according to the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of a medium-sized milling machine;

[0026] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium milling gantry assembly;

[0027] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point A;

[0028] Figure 5 yes Figure 2 Schematic diagram of the tool magazine structure;

[0029] Figure 6 yes Figure 1 A schematic diagram of the pre-positioning and straightening mechanism for intermediate products;

[0030] Figure 7 yes Figure 6 A schematic diagram of the structure on the other side;

[0031] Figure 8 This is a schematic diagram of the square shell processing plate on the upper surface of the square shell module during the processing of this utility model;

[0032] Figure 9 This is a schematic diagram of the processing of the blade module on both sides of the blade module during the processing of the blade module.

[0033] The meanings of the labels in the figures are as follows.

[0034] 1. Safety Room; 2. KBK Overhead Crane; 3. Lifting Gear; 4. Product Pre-positioning and Organizing Mechanism; 5. Independent Electrical Control Cabinet; 6. Milling Machine Electrical Control Cabinet; 7. Dust Collector; 8. Spindle Chiller; 9. Milling Machine; 10. Isolation Fence; 11. Dust Extraction Port; 12. Milling Gantry Assembly; 13. Slide Table; 14. Zero Point Positioning System; 15. Bed; 16. Tool Magazine; 17. Flange Cover; 18. Lead Screw Module; 19. Gantry Frame; 20. Z-axis Module; 21. Automatic Tool Release Cylinder; 22. 2D Camera; 23. Light Source. 3. 3D camera 24. Electric spindle 25. Tool holder 26. Milling cutter 27. Housing 28. High-precision rotary table 29. Camera mounting plate 30. Z-axis motor 31. Tool 32. Automatic tool setter 33. Tool servo module 34. Tool dust cover 35. Tool magazine bracket 36. Elastic tool holder 37. Left push plate 38. Offline tooling 39. Sub-pallet 40. Limiting bracket 41. Right push plate 42. Clamping servo motor 43. Pull stud 44. Square shell machining bar 45. Blade module machining bar 46. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] like Figures 1-9 As shown, a milling machine for square-shell and blade battery modules includes a KBK overhead crane 2, a lifting device 3, and a milling machine 9. The KBK overhead crane 2 is installed at the front end of the milling machine 9, and the lifting device 3 is installed on the KBK overhead crane 2. A product pre-positioning and straightening 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 bed 14. The slide table 13, which moves back and forth, is mounted on the bed 14. The milling gantry assembly 12 is mounted in the middle of the bed 14. The milling gantry assembly 12 includes a gantry 19 mounted on the bed 14. A lead screw module 17 and a lead screw motor 18 are mounted 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 and right directions. The Z-axis module 20 drives the high-precision rotary table 29 below to move in the vertical direction. The high-precision rotary table 29 drives the milling head assembly to rotate.

[0039] A bell cover 16 is installed on the outer side of both the lead screw module 17 and the Z-axis module 20.

[0040] A safety room 1 is installed on the outside of the milling machine 9. An independent electrical control cabinet 5 is installed on one side of the KBK overhead crane 2. A milling machine power 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. An isolation fence 10 is installed between the milling machine 9 and the product pre-positioning and straightening mechanism 4.

[0041] The product pre-positioning and straightening mechanism 4 includes a lower fixture 39 and a sub-pallet 40. A left push plate 38 and a right push plate 42 are respectively installed on the left and right sides of the lower fixture 39. A clamping servo motor 43 installed on the lower fixture 39 drives the inner left push plate 38 or right push plate 42 to move in the left and right directions. The sub-pallet 40 is located on the lower fixture 39 between the left push plate 38 and the right push plate 42. Several limit brackets 41 are evenly distributed on the sub-pallet 40.

[0042] Several zero-point positioning systems 130 are installed on the slide table 13, and several pull studs 44 adapted to the aforementioned zero-point positioning systems 130 are installed on the bottom of the sub-tray 40.

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

[0044] The milling head assembly includes a housing 28 mounted on a high-precision rotary table 29. An electric spindle 25 is installed inside the housing 28. An automatic tool release 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. A camera mounting plate 30 is mounted on the housing 28, and a 2D camera 22, a light source 23, and a 3D camera 24 are mounted on the camera mounting plate 30.

[0045] The first embodiment of this utility model:

[0046] like Figure 8 and 9 The diagram shows the machining positions of the square-shell module and the long and short blade modules. The square-shell cell module's terminals (i.e., the square-shell machining tab 45) face upwards, while the blade cell module's terminals (i.e., the blade module machining tab 46) face both sides. To enable simultaneous machining of the products and reduce the number of product clamping and hoisting operations, a swingable machining head is designed. Combined with a zero-point positioning system, efficient form changing and machining of both sides in a single clamping operation are achieved, reducing the number of product clamping operations and greatly improving production efficiency and machining accuracy.

[0047] like Figure 1 The milling equipment shown in the diagram generates aluminum dust during processing. The processing area is equipped with a closed safety chamber 1, with a dust extraction port 11 on the top. Products are loaded and unloaded using a KBK gantry crane 2 combined with a lifting device 3. The processing equipment uses a sliding table type; after the product is loaded onto the sliding table 13, it automatically slides into the safety chamber 1 for processing. After processing, the sliding table 13 automatically slides out of the safety chamber 1. Manual unloading and loading are performed using the KBK gantry crane 2. To improve loading and unloading efficiency, a product pre-positioning and straightening mechanism 4 is designed offline, equipped with an independent electrical control cabinet 5, an electrical control cabinet for the milling machine 6, a dust collector 7, and a spindle chiller 8. Figure 2 In the process, the front end of the milling gantry assembly 12 (i.e. the side facing the product pre-positioning and straightening mechanism 4) is the external loading and unloading area of ​​station one, with an open design above; station two is the milling processing area at the milling gantry assembly 12, equipped with a closed safety room 1 to prevent aluminum dust from polluting the environment, and the dust extraction port 11 at the top is connected to the dust collector 7 to prevent the aluminum dust concentration in the safety room from being too high and causing an explosion.

[0048] like Figure 2 The diagram shows the overall components of the milling machine, including three linear motion axes and one spindle angle rotation axis. The milling machine consists of: a milling gantry assembly 12 mounted on the bed 14, a slide 13 mounted on the bed 14, a simple tool magazine 15 mounted on the bed 14, and a zero-point positioning system 130 mounted on the slide 13.

[0049] like Figure 3 and Figure 4The schematic diagram of the milling machine gantry assembly 12 shows that the bell cover 16 is installed on the gantry 19 to protect the guide rails from dust. The Z-axis module 20 is driven laterally by the lead screw module 17 and the lead screw motor 18. The milling cutter 27 is installed on the BT30 tool holder 26 using a center puller mechanism. The BT30 tool holder 26 is installed on the electric spindle 25 using a pneumatic 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 housing 28, and the housing 28 is installed on the high-precision rotary table 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, which is installed on the housing 28.

[0050] like Figure 5 The diagram shows a milling machine tool magazine and tool setter. The tool servo module 34 is screwed onto the tool magazine bracket 36, and the tool dust cover 35 is also mounted on the tool magazine bracket 36 to prevent aluminum chips from falling onto the tools during machining. The tool magazine can hold three tools 32, which are mounted on flexible tool holders 37. The automatic tool setter 33 is mounted 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 tool change, the automatic tool setter 32 and the tools 32 automatically move back into the dust cover.

[0051] like Figure 6 and Figure 7 The diagram shows the offline assembly and alignment fixture. Six rivets 44 are installed at the bottom of the sub-pallet 40. The rivets 44 cooperate with the zero-point positioning system 130 on the slide table 13 to achieve quick change of the sub-pallet. Milling surfaces 45 and 46 indicate the machining positions. The sub-pallet 40 is installed on the offline fixture 39 using the zero-point positioning system. When installing the blade battery, the left push plate 38 and right push plate 42 of the centering and alignment mechanism are required. The left push plate 38 and right push plate 42 are driven by the clamping servo motor 43. The internal mechanism uses positive and negative toothed ball screws to achieve centering, clamping and alignment. The product is clamped by the clamping mechanism 42.

[0052] After the equipment is started, personnel use a KK overhead crane 2 to load products at one workstation, hoisting a 40-unit sub-pallet. Once loading is complete, slide table 13 moves the 40-unit sub-pallet into workstation two of the processing area. Simultaneously, the equipment's vision system scans the weld plates, using 2D vision to locate weld seams and 3D vision to measure machining allowances. After the vision scan, the milling machine automatically performs rough machining of the weld plates using its tool setter. Following this, a second vision scan is performed, and the cylindrical surfaces are precision milled. After machining, slide table 13 moves the 40-unit sub-pallet from workstation two to workstation one, where it is manually unloaded. Then, a set of sub-pallets is hoisted from the offline tooling for loading.

[0053] This invention provides a device for automatically removing the electrode plates from the surface of lithium battery modules. The device adopts an XYZ three-axis linear motion gantry structure. A high-precision rotary table is mounted on the Z-axis square slide block, and a high-speed electric spindle is mounted on the rotary table. The milling cutter can swing at an angle of ±100°. The spindle has a BT30 tapered hole and a BT30 milling cutter holder is installed. It is equipped with an automatic tool changer and an automatic tool setter to automatically detect and compensate for tool wear to ensure machining accuracy. It uses 2D vision aerial photography combined with 3D vision line scanning to locate the machining position and guide the machining amount. This structure configuration is compatible with milling the electrode plates on both sides of modules with long and short blades, and also compatible with milling the electrode plates on the top surface of square-shell battery cells. This improves product compatibility, processing efficiency, and machining accuracy. The milled battery cell electrode surface has high flatness and a roughness of up to 3.2μm. After milling, the battery cell can be disassembled for reuse, reducing resource waste and improving enterprise efficiency. The milling work area is equipped with a closed safety room, which is equipped with a dust extraction pipe interface. The dust extraction port is connected to an explosion-proof dust collector to prevent aluminum dust from exploding during milling.

[0054] This utility model features a gantry structure with an angle swing design, compatible with the disassembly of various battery cell modules. It is suitable for disassembling diverse product types across various industries, offering high compatibility and reducing the number of machines required. It allows for rough milling to remove the wafers before fine milling the electrode surfaces, ensuring good surface roughness and improving cell recycling rates. Precise control of rotational speed and conveyor speed prevents excessive overheating of the electrode surfaces, reducing high-temperature damage to the cells and improving the yield rate.

[0055] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A square case and blade battery module bar milling device, comprising a KBK travelling crane (2), a lifting tool (3) and a milling machine (9), the KBK travelling crane (2) is installed at the front end of the milling machine (9), and the lifting tool (3) is installed on the KBK travelling crane (2); characterized in that: The product pre-positioning and shaping mechanism (4) is arranged below the KBK line crane (2) at the front end of the milling machine (9); The milling machine (9) comprises a milling gantry assembly (12), a sliding table (13) and a bed body (14), the sliding table (13) is arranged on the bed body (14) and moves forward and backward, the milling gantry assembly (12) is arranged in the middle of the bed body (14), the milling gantry assembly (12) comprises a gantry (19) arranged on the bed body (14), a lead screw module (17) and a lead screw motor (18) are arranged on the top of the gantry (19), the lead screw module (17) drives a Z-axis module (20) and a Z-axis motor (31) to move in the left-right direction, the Z-axis module (20) drives a high-precision rotary table (29) below to move in the vertical direction, and the high-precision rotary table (29) drives a milling head assembly to rotate. The product pre-positioning and shaping mechanism (4) comprises an offline tooling (39) and a sub-pallet (40), left and right push plates (38) and (42) are respectively arranged on the left and right sides of the offline tooling (39), a compression servo motor (43) arranged on the offline tooling (39) drives the left or right push plate (38) or (42) on the inner side to move in the left-right direction, and the sub-pallet (40) is arranged on the offline tooling (39) between the left and right push plates (38) and (42).

2. The square case and blade battery module shaving apparatus according to claim 1, wherein A safety house (1) is arranged outside the milling machine (9), an independent electric control cabinet (5) is arranged on one side of the KBK line crane (2), a milling machine distribution electric control cabinet (6), a dust collection purifier (7) and a main shaft cold water machine (8) are arranged on one side of the safety house (1), a dust extraction port (11) is arranged on the top of the safety house (1), and an isolation fence (10) is arranged between the milling machine (9) and the product pre-positioning and shaping mechanism (4).

3. The square case and blade battery module shaving apparatus of claim 1, wherein, A plurality of zero-positioning systems (130) are arranged on the sliding table (13), and a plurality of pull pins (44) matched with the zero-positioning systems (130) are arranged on the bottom of the sub-pallet (40).

4. The square case and blade battery module shaving apparatus of claim 1 wherein, A tool magazine (15) is arranged on one side of the bed body (14), the tool magazine (15) comprises a tool servo module (34) arranged on a tool magazine support (36), a tool dust cover (35) is arranged outside the tool servo module (34), the tool servo module (34) drives a plurality of tools (32) and an automatic tool setting instrument (33) to move in the front-rear direction, and the plurality of tools (32) are respectively arranged on the tool servo module (34) through elastic tool holders (37).

5. The square case and blade battery module shaving apparatus of claim 1 wherein, Piano covers (16) are arranged outside the lead screw module (17) and the Z-axis module (20).

6. The square case and blade battery module shaving apparatus of claim 1 wherein, The milling head assembly comprises a box body (28) arranged on the high-precision rotary table (29), an electric spindle (25) arranged in the box body (28), an automatic tool releasing cylinder (21) arranged on the first side of the electric spindle (25), a tool shank (26) arranged on the second side of the electric spindle (25), and a milling cutter (27) arranged on the tool shank (26).

7. The square case and blade battery module shaving apparatus of claim 6 wherein, 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 case and blade battery module shaving apparatus of claim 1 wherein, A plurality of limiting racks (41) are uniformly distributed on the sub-tray (40).

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