A tooling and method for disassembling aluminum busbars

Abstract

This invention provides a busbar disassembly fixture and method. The busbar disassembly fixture includes: a positioning mechanism for clamping and positioning the busbar connected to the battery cell; the positioning mechanism has positioning sleeves corresponding to each required disassembly point on the busbar; and a rough milling mechanism with a rough milling cutter for inserting into the positioning sleeves to disassemble the busbar at specific points. In this solution, the positioning mechanism positions the required disassembly locations on the busbar, allowing the rough milling mechanism to accurately control the disassembly position and avoid damaging other non-disassembly parts. This ensures that the surface of the battery cell terminals meets the quality requirements for secondary welding during battery cell recycling and reuse.

Description

Technical Field

[0001] This invention relates to the field of battery disassembly technology, specifically to a disassembly fixture and method for a busbar aluminum bus. Background Technology

[0002] With the widespread adoption and mass production of CTP (cell-to-pack) power battery packs, the issues of disassembling, repairing, and recycling these power battery packs will gradually become more prominent.

[0003] Currently, the typical CTP (Cell-to-Pack) power battery structure involves assembling cells and placing them inside a battery case. The bottom of the cells is bonded to the cooling structure of the case using a thermally conductive adhesive, and the cell terminals are fixed to the busbars using laser welding. When CTP power batteries require cell-level after-sales maintenance and subsequent reuse after disassembly, the most crucial step is disassembling the busbars connecting the cells. Because the busbars are laser-welded to the cell terminals, manually peeling them off is labor-intensive and inefficient, and can easily damage the cell terminals, rendering them unusable.

[0004] In the existing technology, patent application number CN202222547690.5 discloses a power battery pack dismantling and recycling device, including a dismantling workbench, a power battery pack hopper at the left end of the dismantling workbench, a power battery pack inside the hopper, and a transfer vehicle transporting the power battery pack to a PACK box upper pallet. A dust collector is located to the right of the PACK box upper pallet for dust removal from the power battery pack, a coolant discharge device is located to the right of the dust collector for discharging coolant from the power battery pack, and a roller conveyor belt is located to the right of the coolant discharge device for transporting the PACK box upper pallet. This device is a fixed combination of multiple devices forming a production line, requiring a large area, high investment costs, and high difficulty in equipment debugging and maintenance. It lacks simplicity and reliability. Furthermore, this solution only mills the aluminum strips of the small modules inside the MTP battery pack structure, failing to protect the cell terminals from damage, and is not suitable for dismantling CTP battery packs.

[0005] Patent application CN202210476149.1 discloses a method and equipment for the recycling and reuse of power batteries. The method includes: initially sorting power battery packs and grouping them by type; disassembling, sorting, and repairing power battery packs in the same group step by step to obtain repaired batteries and scrapped batteries; reassembling and testing usable batteries of the same type step by step to form batch mixed-flow process power battery packs; reassembling and testing usable batteries of different types step by step to form random mixed-flow process power battery packs; and verifying the batch mixed-flow process power battery packs or the random mixed-flow process power battery packs. This method does not describe the cell disassembly method or the cell terminal surface treatment process, and therefore cannot definitively determine whether the disassembled batteries can be reused.

[0006] It is evident that existing technologies have not solved the problem of ensuring that the laser weld connecting the battery cell and the busbar is not damaged after disassembly during the battery cell electrode recycling process. They have not achieved the secondary welding surface quality required for the battery cell electrode surface during the battery cell disassembly, step recycling, and reuse. Summary of the Invention

[0007] One of the objectives of this invention is to provide a busbar disassembly tooling and disassembly method to reduce the possibility of damage to the battery cell terminals during disassembly in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A busbar disassembly tooling includes:

[0010] A positioning mechanism is used to clamp and position the busbar connecting the battery cell on the battery. The positioning mechanism is provided with positioning sleeves corresponding to each disassembly point on the busbar.

[0011] A rough drilling and milling mechanism is provided, which is equipped with a roughing milling cutter. The rough drilling and milling mechanism is used to extend into the positioning sleeve to disassemble the busbar at a fixed point.

[0012] Based on the above technical means, the required disassembly position on the busbar is located by the positioning mechanism, so that the rough drilling and milling mechanism can accurately control the disassembly position and avoid damaging other non-disassembly parts, so that the surface of the battery cell terminal can meet the quality requirements of the secondary welding surface when the battery cell is recycled and reused.

[0013] When in use, first install the positioning mechanism to locate the required disassembly position on the busbar, and then control the rough drilling and milling mechanism to enter the positioning sleeve to perform drilling and milling operations so that the battery cell and the busbar can be disassembled.

[0014] It should be noted that the positioning sleeve includes the first sleeve and the second sleeve mentioned later.

[0015] Optionally, the positioning mechanism includes:

[0016] A clamping and positioning assembly is used to clamp the busbars on the first and second sides of the battery, wherein the first and second sides are opposite sides of the battery.

[0017] A connecting positioning component is used to press the clamping positioning component, and the connecting positioning component is positioned and installed with the clamping positioning component.

[0018] According to the above technical means, the clamping and positioning component is used to position the busbars on the first and second sides of the battery, and the connecting and positioning component is used to position other busbars on the battery to determine the parts to be disassembled.

[0019] It should be noted that the battery contains multiple groups of cells arranged side by side, each group of cells having a corresponding busbar. On batteries of the same model, the busbars are positioned identically. In use, first install the clamping and positioning assembly to locate the desired disassembly position on the busbars on either side of the battery. Then install the connecting and positioning assembly. The positioning between the connecting and clamping positioning assemblies ensures the connecting and positioning assembly is aligned with the busbars, facilitating the insertion of the roughing and milling mechanism into the positioning sleeve for milling operations.

[0020] Optionally, the clamping and positioning assembly includes:

[0021] Clamping plates are installed at both ends of the busbar and abut against it;

[0022] The first sleeve is fixed on the clamping plate and is used to align the part of the busbar that needs to be disassembled.

[0023] A clamping plate is provided with a clamping mounting position, which is used to hold the first sleeve tightly;

[0024] The clamping element, passing through the clamping plate, is used to clamp the busbar aluminum busbar;

[0025] The positioning sleeve includes the first sleeve.

[0026] According to the above-mentioned technical means, the positioning of the side busbars on both sides of the battery is achieved by clamping plates, the corresponding disassembly parts on the busbars are determined by the first sleeve, and the middle part of the corresponding busbars is pressed by the pressing plate and the top clamping member to ensure the accuracy of the positioning of the busbars.

[0027] It should also be noted that the clamping plate, the top clamping member, and the first sleeve in this application enable the busbar to be positioned in three directions: X square, Y direction, and Z direction.

[0028] Optionally, the clamping plate is provided with a contact surface for abutting against the busbar, the contact surface including:

[0029] An inserting protrusion is provided on the contact surface at a position close to the battery cell, the inserting protrusion being used to extend into the gap between the busbar and the battery cell;

[0030] Side limiting protrusions are provided at both ends of the protrusions and are used to side limit the busbar.

[0031] According to the above technical means, the insertion protrusion and the side limiting protrusion are used to position the busbar in the X and Y directions. The upper surface of the insertion protrusion and the lower surface of the first sleeve cooperate to position the busbar in the Z direction.

[0032] Optionally, the clamping plate includes a clamp for gripping the first sleeve, and the clamp is used to lock and fix the opening and closing position of the first sleeve by a locking member after gripping the first sleeve.

[0033] Based on the aforementioned technical means, the clamp is designed to fix the pressure plate on the first sleeve.

[0034] Optionally, two clamps are arranged side by side, with a common connection between the two clamps, and the tightening member passes through the common connection to press against the busbar.

[0035] According to the above technical means, the two clamps are integrated to fix the first sleeves on both sides. The clamps tighten the first sleeves; since the first sleeves are fixed to the clamping plates, the clamps tightening the first sleeves fix the clamps' position. The clamp is a circular sleeve with an opening / closing position; this opening / closing position increases its applicability to accommodate tightening the first sleeve.

[0036] Optionally, the clamping member includes:

[0037] A pressure block is used to be placed between the pressure plate and the busbar to be disassembled;

[0038] An adjusting component passes through the pressing plate and connects to the pressing block, with a threaded fit between the adjusting component and the pressing plate.

[0039] According to the above technical means, due to the setting of the adjusting component, the position of the pressure block is adjusted, and by rotating the adjusting component, the pressing force of the pressure block on the corresponding busbar aluminum busbar is adjusted.

[0040] Optionally, the connecting positioning component includes a tooling plate, on which a second sleeve is provided corresponding to the part of the busbar that needs to be disassembled, and the tooling plate and the clamping positioning component are positioned by a positioning pin; the positioning sleeve includes the second sleeve.

[0041] According to the above technical means, the tooling plate is used to install the second sleeve, and the tooling plate is connected to the clamping and positioning components on both sides of the battery. The second sleeve is used to position the disassembled aluminum busbar between the two sides of the battery. The positioning pins are used to position the tooling plate and the clamping and positioning components.

[0042] Optionally, the busbar disassembly fixture further includes a precision drilling and milling mechanism, which includes:

[0043] Positioning the cylindrical cylinder

[0044] The central component is rotatably disposed inside the positioning cylinder with the axis of the positioning cylinder as the rotation center, and a finishing milling cutter is provided at the end of the central component.

[0045] Based on the aforementioned technical means, the positioning cylinder is used to install the finishing milling cutter. Simultaneously, during the milling operation of the finishing milling cutter, machining debris is blocked by the positioning cylinder, thus preventing debris from splashing.

[0046] Optionally, the central component includes:

[0047] A retaining ring is rotatably mounted inside the positioning cylinder relative to the positioning cylinder;

[0048] A positioning adjustment ring is disposed on the fixed ring and is threadedly engaged with the fixed ring;

[0049] The central shaft is located inside the positioning adjustment ring and rotates with the positioning adjustment ring to adjust the distance between it and the desired disassembly position.

[0050] According to the above technical means, the fixed ring allows the central shaft to be rotated according to machining requirements. The central shaft is used to mount the finishing milling cutter. The positioning adjustment ring allows for adjustment of the position of the finishing milling cutter; the height of the milling cutter can be adjusted by rotating the positioning adjustment ring.

[0051] Optionally, the central axis includes:

[0052] A bushing is disposed inside the positioning and adjusting ring, and a first limiting step is provided inside the bushing.

[0053] A connecting shaft is provided for connecting to the finishing milling cutter after passing through the bushing. The end of the connecting shaft for connecting to the finishing milling cutter is provided with a second limiting step for abutting against the end of the bushing. The part of the connecting shaft located inside the bushing is provided with a third limiting step for cooperating with the first limiting step for limiting.

[0054] A positioning sleeve is disposed between the inner wall of the bushing and the outer wall of the connecting shaft, and abuts against the third limiting step.

[0055] Based on the aforementioned technical means, the bushing allows the connecting shaft to move up and down, thereby enabling the finishing milling cutter to move up and down. The positioning sleeve serves to position the connecting shaft. The first and third limiting steps prevent the connecting shaft from disengaging during upward movement. The second limiting step prevents the connecting shaft from disengaging during downward movement.

[0056] A method for disassembling a busbar aluminum busbar includes:

[0057] Pre-treat the power battery to expose the connection points between the current busbar and the battery cell that need to be disassembled.

[0058] The positioning mechanism in the above-mentioned busbar disassembly fixture is used to locate the part of the busbar that needs to be disassembled, and the disassembly operation is carried out by the rough drilling and milling mechanism.

[0059] During the dismantling of the aluminum busbar, aluminum debris is adsorbed and treated.

[0060] Strip the aluminum busbar.

[0061] Based on the above technical means, the required disassembly position is located during the disassembly of the busbar, achieving precise disassembly and reducing the possibility of damage to the battery cell caused by the rough milling cutter during disassembly. This allows the disassembled battery cell to be reused and meet the requirements of secondary welding.

[0062] In addition, the busbar disassembly tooling and disassembly method in this application have the following advantages:

[0063] 1. The positioning mechanism of this application is easy to fix, and the tools used (referring to the rough drilling and milling mechanism) are a handheld electric gun, a depth setter and matching alloy milling cutter (referring to the roughing milling cutter). Because the positioning fixture is small in size and light in weight, it is easy to carry and transfer, can be operated by a single person, has small requirements for site space, and is suitable for a variety of scenarios.

[0064] 2. The cost of the busbar disassembly tooling in this application is lower than that of automated milling machines. It does not require dedicated supporting facilities and equipment, and does not require a large investment in equipment procurement, installation, commissioning and maintenance.

[0065] 3. The busbar disassembly tooling and disassembly method of the present invention enable the disassembly of the cell layer of the CTP structure power battery pack, avoiding damage to the cell terminals, realizing the reuse of the cells, effectively saving costs, reducing resource waste, and protecting the environment. Attached Figure Description

[0066] Figure 1This is an isometric view of the positioning mechanism shown in an embodiment of the present invention.

[0067] Figure 2 This is an isometric view of the clamping and positioning assembly shown in an embodiment of the present invention.

[0068] Figure 3 This is a schematic diagram of the clamping plate shown in an embodiment of the present invention.

[0069] Figure 4 This is a schematic diagram of the internal structure of the precision drilling and milling mechanism shown in an embodiment of the present invention.

[0070] Figure 5 This is a flowchart illustrating the busbar disassembly method in an embodiment of the present invention.

[0071] Figure 6 This is a flowchart illustrating a method for disassembling a busbar in another embodiment of the present invention.

[0072] The components include: clamping and positioning assembly 1, clamping plate 101, arc block 1011, extending protrusion 1012, side limiting protrusion 1013, first positioning hole 1014, first sleeve 102, pressing plate 103, top clamping member 104, adjusting member 1041, pressure block 1042, connecting and positioning assembly 2, tooling plate 201, second sleeve 202, positioning pin 203, precision drilling and milling mechanism 3, positioning cylindrical cylinder 301, bearing 302, fixing ring 303, bushing 304, first limiting step 3041, connecting shaft 305, third limiting step 3051, second limiting step 3052, positioning sleeve 306, precision milling cutter 307, and positioning adjusting ring 308. Detailed Implementation

[0073] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0074] It's worth noting that current CTP (Cell-to-Pack) power battery structures typically involve assembling cells and placing them inside a battery pack. The bottom of the cells is bonded to the cooling structure of the pack using a thermally conductive adhesive, and the cell terminals are fixed to the busbars using laser welding. When CTP power batteries require cell-level after-sales maintenance and subsequent reuse after disassembly, the most crucial step is disassembling the busbars connecting the cells. Because the busbars are laser-welded to the cell terminals, manually peeling them off is labor-intensive and inefficient, and can easily damage the cell terminals, rendering them unusable.

[0075] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0076] The busbar disassembly tooling provided in this application is referenced in the attached document. Figure 1 To be continued Figure 4 As shown.

[0077] This embodiment proposes a disassembly fixture for busbar aluminum busbars, including:

[0078] The positioning mechanism is used to clamp and position the busbar connecting the battery cell on the battery. The positioning mechanism is equipped with positioning sleeves corresponding to each disassembly point on the busbar.

[0079] The rough drilling and milling mechanism is equipped with a roughing milling cutter. The rough drilling and milling mechanism is used to extend into the positioning sleeve to disassemble the busbar at a fixed point.

[0080] In this embodiment, the required disassembly position on the busbar is located by a positioning mechanism so that the rough drilling and milling mechanism can accurately control the disassembly position and avoid damaging other non-disassembly parts, so that the surface of the battery cell terminal can meet the quality requirements of the secondary welding surface when the battery cell is recycled and reused.

[0081] When in use, first install the positioning mechanism to locate the required disassembly position on the busbar, and then control the rough drilling and milling mechanism to enter the positioning sleeve to perform drilling and milling operations so that the battery cell and the busbar can be disassembled.

[0082] It should be noted that the positioning sleeve includes the first sleeve 102 and the second sleeve 202 mentioned later.

[0083] It should also be noted that the roughing and milling mechanism uses an existing structure, which will not be described in detail here.

[0084] Figure 1 This is an isometric view of the positioning mechanism shown in an embodiment of the present invention.

[0085] Reference Appendix Figure 1 As shown, in an exemplary embodiment of this application, the positioning mechanism includes:

[0086] The clamping and positioning component 1 is used to clamp the busbars on the first and second sides of the battery, where the first and second sides are the opposite sides of the battery.

[0087] Connecting positioning component 2 is used to press and hold positioning component 1, and connecting positioning component 2 and holding positioning component 1 for positioning installation.

[0088] It should be noted that the battery contains multiple groups of cells arranged side by side, and each group of cells has a corresponding busbar. The busbars are positioned identically on batteries of the same model. In use, first install the clamping and positioning component 1 to locate the desired disassembly position on the busbars on both sides of the battery. Then install the connecting and positioning component 2. The positioning of the connecting and positioning component 2 with the clamping and positioning component 1 facilitates the insertion of the roughing and milling mechanism into the positioning sleeve for milling operations.

[0089] Figure 2 This is an isometric view of the clamping and positioning assembly shown in an embodiment of the present invention.

[0090] Reference Appendix Figure 2 As shown, in an exemplary embodiment, the clamping and positioning component 1 includes:

[0091] Clamping plates 101 are installed at both ends of the busbar and abut against it;

[0092] The first sleeve 102 is fixed on the clamping plate 101 and is used to align the part of the busbar that needs to be disassembled.

[0093] The clamping plate 103 is provided with a clamping mounting position, which is used to clamp the first sleeve 102.

[0094] The clamping member 104 passes through the clamping plate 103 and is used to clamp the busbar aluminum bus.

[0095] In this embodiment, the two ends of the busbar are clamped by the clamping plate 101, so that the first sleeve 102 is aligned with the part to be disassembled. Then, the middle part of the busbar clamped by the clamping plate 101 is pressed by the pressing plate 103 and the top clamping member 104.

[0096] For example, two clamping plates 101 are arranged opposite each other, with the opposite side being the contact surface described later. An arc-shaped block 1011 for installing the first sleeve 102 is provided on the contact surface. The first sleeve 102 is welded and fixed inside the arc-shaped block 1011 for fixation. The arc-shaped block 1011 also serves a positioning function during the installation of the first sleeve 102. A clamping plate 103 hugs the first sleeve 102 to fix the clamping plate 103. Then, a top clamping member 104 is installed on the clamping plate 103 to press the center of the corresponding busbar aluminum plate.

[0097] Figure 3 This is a schematic diagram of the clamping plate shown in an embodiment of the present invention.

[0098] Reference Appendix Figure 3 As shown, in an exemplary embodiment, the clamping plate 101 is provided with a contact surface for abutting against the busbar, the contact surface including:

[0099] The protruding part 1012 is provided on the contact surface at a position close to the battery cell. The protruding part 1012 is used to extend into the gap between the busbar and the battery cell (i.e., to extend into the gap between the bottom of the busbar and the battery cell).

[0100] Side limiting protrusions 1013 are provided at both ends of the protrusions 1012 and are used to side limit the busbar (if the left and right sides are the two ends of the busbar, then the front and back are the two sides of the busbar, and the side limiting protrusions 1013 are provided on both sides of the busbar).

[0101] It should be noted that the protruding protrusion 1012 and the side limiting protrusion 1013 are designed to achieve positioning in the X, Y, and Z directions. The protruding protrusion 1012 not only provides positioning in the X direction but also assists in positioning in the Z direction. The side limiting protrusion 1013 provides positioning in the Y direction. The clamping member 104 and the pressure plate 103, etc., provide limiting in the Z direction, thereby ensuring positioning accuracy.

[0102] In an exemplary embodiment, the clamping plate 103 includes a clamp for clamping the first sleeve 102. The clamp has a clamping mounting position and an opening / closing position. After the clamp is used to clamp the first sleeve 102, the opening / closing position is locked and fixed by a locking member.

[0103] In this embodiment, the clamping device is used to tighten the first sleeve 102. Since the first sleeve 102 is fixed to the clamping plate 101, the clamping device can fix the position of the clamp by clamping the first sleeve 102. The clamping device is a circular sleeve with an opening and closing position. The opening and closing position increases its applicability to accommodate the clamping of the first sleeve 102.

[0104] In one exemplary embodiment, two clamps are arranged side by side, and a common connection is provided between the two clamps. The clamping member 104 passes through the common connection and presses against the busbar aluminum busbar.

[0105] In this embodiment, there are two disassembly positions on the same busbar, and clamps are set at the two positions. The two clamps are connected by a common connection to realize the connection between the clamping plates 101 at both ends of the busbar and the corresponding first sleeves 102 on the clamping plates 101.

[0106] It should also be noted that the clamp and the common joint can be formed by processing the same plate. That is, two holes are opened on a plate for fitting onto the first sleeve 102, and an opening and closing position is set for each hole. The opening and closing position is provided with screw holes, and the opening and closing position is locked by installing bolts, screws and other locking parts, so that the clamp clamps the first sleeve 102 tightly.

[0107] In one exemplary embodiment, the clamping member 104 includes:

[0108] Pressure block 1042 is used to be disposed between pressure plate 103 and busbar to be disassembled;

[0109] Adjusting component 1041 passes through pressing plate 103 and connects to pressing block 1042. Adjusting component 1041 and pressing plate 103 are threaded together.

[0110] In this embodiment, the adjusting member 1041 is a screw, the pressure block 1042 is fixed to the screw, and the screw is threadedly engaged with the pressure plate 103. The clamping force of the pressure block 1042 on the busbar can be adjusted by rotating the screw. The positioning of the busbar in the z-direction is achieved by the setting of the clamping member 104, etc., in cooperation with the first sleeve 102 and the protruding protrusion 1012.

[0111] In an exemplary embodiment, the connection positioning component 2 includes a tooling plate 201, on which a second sleeve 202 is provided corresponding to the part of the busbar that needs to be disassembled. The tooling plate 201 and the clamping positioning component 1 are positioned by a positioning pin 203.

[0112] It should be noted that the second sleeve 202 is provided to locate other parts that need to be disassembled, in addition to the parts that have already been located by the first sleeve 102.

[0113] For example, the tooling plate 201 and the second sleeve 202 are made of insulating material. The second sleeve 202 (which is a nylon sleeve) is bolted to the tooling plate 201. The tooling plate 201 and the second sleeve 202 have insulating properties, which can prevent the battery cell from short-circuiting and catching fire.

[0114] For example, the clamping plate 103 is provided with a first positioning hole 1014 on the side facing the connecting positioning component 2, and the tooling plate 201 is provided with a second positioning hole corresponding to the first positioning hole 1014. The positioning pin 203 passes through the first positioning hole 1014 and the second positioning hole to achieve positioning.

[0115] Figure 4 This is a schematic diagram of the internal structure of the drilling and milling mechanism in an embodiment of the present invention.

[0116] Reference Appendix Figure 4 As shown, in an exemplary embodiment, the busbar disassembly fixture further includes a precision drilling and milling mechanism 3, which includes:

[0117] Positioning cylindrical tube 301,

[0118] The central component is rotatably mounted inside the positioning cylinder 301 with the axis of the positioning cylinder 301 as the rotation center, and a finishing milling cutter 307 is provided at the end of the central component.

[0119] It should be noted that the positioning cylinder 301 in this application serves to install the central component and also reduces the occurrence of machining debris splashing.

[0120] For example, one end of the positioning cylinder 301 is tapered, and a finishing milling cutter 307 is installed in the tapered part to reduce the possibility of interference with other components during the machining process.

[0121] It should also be noted that the bottom of the positioning cylinder 301 is provided with a positioning step hole for positioning with the battery cell electrode post. The positioning step hole is located at the end of the tapered part, and the finishing milling cutter extends from the positioning step hole to perform finishing on the battery cell electrode post.

[0122] In one exemplary embodiment, the central component includes:

[0123] The fixing ring 303 is rotatably mounted inside the positioning cylinder 301 relative to the positioning cylinder 301;

[0124] The positioning adjustment ring 308 is set on the fixed ring 303 and is threadedly engaged with the fixed ring 303;

[0125] The central shaft is set inside the positioning adjustment ring 308 and adjusts the distance between it and the required disassembly position as the positioning adjustment ring 308 rotates.

[0126] In this embodiment, the fixed ring 303 rotates relative to the positioning cylinder 301 to facilitate the rotation of the center assembly according to machining requirements. The center shaft is provided for mounting the finishing milling cutter 307. The threaded engagement between the positioning adjusting ring 308 and the fixed ring 303 allows for adjustment of the distance between the finishing milling cutter 307 and the machining position by rotating the positioning adjusting ring 308.

[0127] For example, the retaining ring 303 is connected to the positioning cylinder 301 via a bearing 302.

[0128] In one exemplary embodiment, the central axis includes:

[0129] A bushing 304 is disposed inside a positioning and adjusting ring 308, and a first limiting step 3041 is provided inside the bushing 304.

[0130] A connecting shaft 305 is used to pass through a bushing 304 and connect to a finishing milling cutter 307. The end of the connecting shaft 305 that is connected to the finishing milling cutter 307 is provided with a second limiting step 3052 near the end of the bushing 304 for abutting against the end of the bushing 304. The part of the connecting shaft 305 located inside the bushing is provided with a third limiting step 3051 for cooperating with the first limiting step 3041 for limiting.

[0131] The positioning sleeve 306 is disposed between the inner wall of the bushing 304 and the outer wall of the connecting shaft 305, and abuts against the third limiting step 3051.

[0132] It should be noted that the bushing 304 is designed to accommodate the connecting shaft 305, which in turn accommodates the finishing milling cutter 307. The second limiting step 3052 is designed to prevent the connecting shaft 305 from disengaging from the bushing 304 during upward movement. The third limiting step 3051 is designed to facilitate the installation of the positioning sleeve 306. The third limiting step 3051 cooperates with the first limiting step 3041 to prevent the connecting shaft 305 from disengaging from the bushing 304 during downward movement.

[0133] It should also be noted that the circumference of the positioning sleeve 306 is marked with graduations. The finishing milling cutter is a one-piece alloy milling cutter with a working surface diameter larger than the outer diameter of the laser weld seam, a cutting edge angle of 180°, and a horizontal working surface. The depth adjustment is achieved by rotating the positioning adjustment ring. Since the external thread pitch of the connecting shaft is 1mm, the graduations on the circumference of the positioning sleeve 306 are divided into 20 equal parts. Each rotation of one graduation corresponds to a precision milling depth adjustment of 1mm / 20 = 0.05mm.

[0134] In addition, the outer diameter of the finishing milling cutter should be larger than the outer diameter of the laser weld seam, the cutting edge angle should be 180°, the depth adjustment accuracy should be 0.02mm, and the depth setter adjustment size should be "busbar thickness - 0.1mm".

[0135] For the aforementioned busbar disassembly fixture, due to the fixing and limiting effect of the positioning mechanism, the alloy milling cutter (referring to the roughing milling cutter) does not slip during the entire drilling and milling process, thus preventing damage to the surface of the battery cell terminal. During finishing, the grinding height is precisely adjusted and controlled by the depth adjustment function of the positioning adjustment ring 308, preventing over-grinding and damage to the battery cell terminal. During the finishing milling of the laser weld seams remaining on the terminal surface, the positioning cylindrical cylinder 301 completely avoids damage to the battery cell due to the positional deviation of the finishing milling cutter, ensuring that the battery cells can be reused after the busbar is disassembled.

[0136] Figure 5 This is a flowchart illustrating the busbar disassembly method in an embodiment of the present invention.

[0137] Reference Appendix Figure 5 As shown, in an exemplary embodiment of this application, a method for disassembling a busbar is also provided, which includes at least steps S100 to S400.

[0138] Step S100: Pre-process the power battery to expose the connection points between the busbar and the battery cell to be disassembled.

[0139] Specifically, the power battery pack cover is manually removed, the high-voltage connecting copper busbars are disassembled, and the mica board, insulating sheets, wiring harness assembly, BMS (battery management system), and electrical components are disassembled. The prepared power battery pack is then placed in a dedicated disassembly area, and insulation and physical protection are provided for non-battery pack and non-disassembly areas.

[0140] Step S200: The part of the busbar to be disassembled is located by the positioning mechanism in the above-mentioned busbar disassembly fixture, and the disassembly operation is carried out by the rough drilling and milling mechanism.

[0141] Specifically, prepare the necessary tooling and fixtures for disassembly, determine the thickness of the aluminum busbar and the outer diameter of the laser weld, select a suitable roughing milling cutter, and adjust and verify the depth setting of the roughing milling mechanism. The process of using the busbar disassembly tooling to drill and mill the laser weld of the busbar includes: installing the positioning mechanism on the busbar, positioning the busbar in the X, Y, and Z directions, and checking that the positioning mechanism is securely fixed after installation; then placing the depth setter and the roughing milling mechanism with the roughing milling cutter into the positioning sleeve, clamping the handheld electric gun chuck onto the roughing milling mechanism, and drilling and milling the busbars in the positioning sleeves in sequence with the assistance of the positioning mechanism. After drilling and milling all the busbars in the positioning sleeves, disassemble the tooling and transfer it to the next position, repeating the above process to complete the drilling and milling of the busbars in other positions.

[0142] When installing the positioning mechanism, first install a clamping plate 101 on the busbar on the first side of the battery. The clamping plate 101 (the first sleeve 102 is welded to the clamping plate 101) is installed at both ends of the busbar to position the busbar in the X and Y directions, aligning the first positioning sleeve with the required disassembly position. Then, install a pressure plate 103 and a clamping member 104, which cooperate with the protruding protrusion 1012 and the first sleeve 102 to press the corresponding middle part of the busbar, achieving positioning in the Z direction. Next, position and install a tooling plate 201 on the clamping plate 101, aligning the second sleeve 202 with other parts on the corresponding busbar that need to be disassembled. Finally, perform a drilling and milling operation. During the drilling and milling operation, the rough drilling and milling mechanism is inserted into the corresponding positioning sleeve (the positioning sleeve includes the first sleeve 102 and the second sleeve 202) for rough machining.

[0143] Step S300: During and after the disassembly of the busbar aluminum busbar, the aluminum debris is adsorbed.

[0144] Specifically, during and after the drilling and milling process, a vacuum cleaner is used to remove aluminum shavings. The drilling and milling effect is then checked to ensure that the bottom surface of the drilled and milled hole is machined flat. An insulated vernier caliper is used to measure the hole depth to confirm the actual cutting amount and determine the size of the cutting allowance for the busbar. Any busbars with a thickness greater than 0.1mm that remain are drilled, milled, ground, and cleaned again.

[0145] Step S400: Strip the busbar aluminum bus.

[0146] Specifically, after drilling and milling the battery module busbars to be disassembled, the busbars are manually peeled off using clamps, and the resulting debris is vacuumed up.

[0147] Reference Appendix Figure 6 As shown, it should also be noted that after step S400, a fine milling and grinding process can be performed, which specifically includes steps S500 to S800.

[0148] Step S500, fine milling: Using the fine milling mechanism 3, after the depth is fixed by rotating the positioning adjustment ring 308, the fine milling cutter 307 is installed into the positioning cylinder 301. The manual hand-held electric gun and the fine milling mechanism 3 are positioned and fixed in the positioning cylinder 301 to remove the residual metal material of the laser weld seam on the surface of the battery cell terminal. Repeat the above process to complete the fine milling of the battery cell terminals in other positions.

[0149] Step S600, Process Cleaning: Use a vacuum cleaner to remove metal aluminum shavings during and after the fine milling and polishing process.

[0150] Step S700, Inspection and Confirmation: Inspect and confirm the surface condition of each battery cell terminal after precision milling and polishing to ensure that it reaches a bright and smooth state. If it does not meet the requirements, perform precision milling and polishing again.

[0151] Step S800, Disassembly complete: Confirm the state after disassembly and classify or label the battery cells.

[0152] After the drilling, milling and precision milling processes in steps S100 to S800, the surface of the cell terminal reaches a bright and smooth state. The battery pack can be reassembled with a new CCS busbar and then welded together. Alternatively, the cell can be disassembled and then sorted, recycled and reused or used in other ways.

[0153] In addition, this application has the following advantages:

[0154] 1. The positioning mechanism of this application is easy to fix, and the tools used (i.e., the rough drilling and milling mechanism) are a handheld electric gun, a depth setter and matching alloy milling cutter (referring to the roughing milling cutter). Because the positioning fixture is small in size and light in weight, it is easy to carry and transfer, can be operated by a single person, has small requirements for site space, and is suitable for a variety of scenarios.

[0155] 2. The cost of the busbar disassembly tooling in this application is lower than that of automated milling machines. It does not require dedicated supporting facilities and equipment, and does not require a large investment in equipment procurement, installation, commissioning and maintenance.

[0156] 3. The busbar disassembly tooling and disassembly method of the present invention enable the disassembly of the cell layer of the CTP structure power battery pack, avoiding damage to the cell terminals, realizing the reuse of the cells, effectively saving costs, reducing resource waste, and protecting the environment.

[0157] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A disassembly tooling for aluminum busbars, characterized in that, include: A positioning mechanism is used to clamp and position the busbar connecting the battery cell on the battery. The positioning mechanism is provided with positioning sleeves corresponding to each disassembly point on the busbar. A rough drilling and milling mechanism is provided with a roughing milling cutter, which is used to extend into the positioning sleeve to disassemble the busbar at a fixed point. The positioning mechanism includes: A clamping and positioning assembly is used to clamp the busbars on the first and second sides of the battery, wherein the first and second sides are opposite sides of the battery. The clamping and positioning component includes: Clamping plates are installed at both ends of the busbar and abut against it; The first sleeve is fixed on the clamping plate and is used to align the part of the busbar that needs to be disassembled. A clamping plate is provided with a clamping mounting position, which is used to hold the first sleeve tightly; The clamping element, passing through the clamping plate, is used to clamp the busbar aluminum busbar; The positioning sleeve includes the first sleeve.

2. The busbar disassembly fixture according to claim 1, characterized in that, The positioning mechanism also includes: A connecting positioning component is used to press the clamping positioning component, and the connecting positioning component is positioned and installed with the clamping positioning component.

3. The busbar disassembly fixture according to claim 1, characterized in that, The clamping plate is provided with a contact surface for abutting against the busbar, and the contact surface includes: An inserting protrusion is provided on the contact surface at a position close to the battery cell, the inserting protrusion being used to extend into the gap between the busbar and the battery cell; Side limiting protrusions are provided at both ends of the protrusions and are used to side limit the busbar.

4. The busbar disassembly fixture according to claim 1, characterized in that, The clamping plate includes a clamp for gripping the first sleeve, and the clamp is used to lock and fix the opening and closing position of the first sleeve by a locking member after gripping the first sleeve.

5. The busbar disassembly fixture according to claim 4, characterized in that, Two clamps are arranged side by side, and a common connection is provided between the two clamps. The tightening member passes through the common connection and presses against the busbar aluminum busbar.

6. The busbar disassembly fixture according to claim 1, characterized in that, The clamping component includes: A pressure block is used to be placed between the pressure plate and the busbar to be disassembled; An adjusting component passes through the pressing plate and connects to the pressing block, with a threaded fit between the adjusting component and the pressing plate.

7. The busbar disassembly fixture according to claim 2, characterized in that, The connection positioning component includes a tooling plate, on which a second sleeve is provided corresponding to the part of the busbar that needs to be disassembled. The tooling plate and the clamping positioning component are positioned by a positioning pin. The positioning sleeve includes the second sleeve.

8. The busbar disassembly fixture according to claim 1, characterized in that, The busbar disassembly fixture also includes a precision drilling and milling mechanism, which comprises: Positioning the cylindrical cylinder The central component is rotatably disposed inside the positioning cylinder with the axis of the positioning cylinder as the rotation center, and a finishing milling cutter is provided at the end of the central component.

9. The busbar disassembly fixture according to claim 8, characterized in that, The central component includes: A retaining ring is rotatably mounted inside the positioning cylinder relative to the positioning cylinder; A positioning adjustment ring is disposed on the fixed ring and is threadedly engaged with the fixed ring; The central shaft is located inside the positioning adjustment ring and rotates with the positioning adjustment ring to adjust the distance between it and the desired disassembly position.

10. The busbar disassembly fixture according to claim 9, characterized in that, The central axis includes: A bushing is disposed inside the positioning and adjusting ring, and a first limiting step is provided inside the bushing. A connecting shaft is provided for connecting to the finishing milling cutter after passing through the bushing. The end of the connecting shaft for connecting to the finishing milling cutter is provided with a second limiting step for abutting against the end of the bushing. The part of the connecting shaft located inside the bushing is provided with a third limiting step for cooperating with the first limiting step for limiting. A positioning sleeve is disposed between the inner wall of the bushing and the outer wall of the connecting shaft, and abuts against the third limiting step.

11. A method for disassembling a busbar aluminum bus, characterized in that, include: Pre-treat the power battery to expose the connection points between the current busbar and the battery cell that need to be disassembled. The positioning mechanism in the busbar disassembly fixture as described in any one of claims 1 to 10 is used to position the part of the busbar that needs to be disassembled, and the disassembly operation is carried out by the rough drilling and milling mechanism. During the dismantling of the aluminum busbar, aluminum debris is adsorbed and treated. Strip the aluminum busbar.

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