Disassembling method of battery device, control device, storage medium and disassembling device

Abstract

The embodiment of the invention provides a disassembling method of a battery device, a control device, a storage medium and a disassembling device.The disassembling method comprises the steps that the position of a to-be-processed area formed after a confluence piece and an electrode terminal are welded is determined, and the thickness size of the to-be-processed area in the first direction is obtained; the number of times of rough ablation is determined, laser is emitted to the to-be-processed area to complete rough ablation of the corresponding number of times, and the ablation size is the first ablation size; the number of times of fine ablation is determined, laser is emitted to the to-be-processed area to complete fine ablation of the corresponding number of times, the ablation size is a second ablation size, and the second ablation size is smaller than the first ablation size. According to the disassembling method of the battery device in the embodiment of the invention, the operation speed can be increased, the difficulty of reusing the electrode terminal can be reduced subsequently, and the size of metal dust generated after ablation can be smaller.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of batteries, and particularly to a disassembly method, a control device, a storage medium, and a disassembly device for a battery device. Background Art

[0002] After the battery device is assembled, it is necessary to detect the assembly quality of the battery device. For the battery devices with unqualified detection, rework is required to recover the reusable parts and assemble them again, so as to save the manufacturing and recycling costs.

[0003] The electrode terminal of the battery cell is connected to the bus bar by welding. If the welding quality between the electrode terminal and the bus bar does not meet the standard, it is necessary to separate the electrode terminal from the bus bar for recycling and reuse. Summary of the Invention

[0004] In view of this, the embodiments of the present application are expected to provide a disassembly method, a control device, a storage medium, and a disassembly device for a battery device that are conducive to separating the electrode terminal from the bus bar and facilitating recycling and reuse.

[0005] To achieve the purpose, the technical solution of the embodiments of the present application is realized as follows: The embodiments of the present application provide a disassembly method for a battery device, which is used to separate the bus bar from the electrode terminal of the battery cell. The disassembly method includes: Preparation stage: Determine the position of the area to be processed formed after the bus bar and the electrode terminal are welded, and obtain the thickness dimension of the area to be processed along the first direction; Rough ablation stage: Determine the number of rough ablations according to the thickness dimension, emit laser towards the area to be processed to complete the corresponding number of rough ablations, and the size of the single rough ablation along the first direction is the first ablation size; Fine ablation stage: Determine the number of fine ablations according to the thickness dimension, the number of rough ablations, and the first ablation size, emit laser towards the area to be processed to complete the corresponding number of fine ablations, and the size of the single fine ablation along the first direction is the second ablation size, and the second ablation size is smaller than the first ablation size.

[0006] The disassembly method of the battery device in the embodiments of the present application, by adopting the method of laser ablation, is beneficial to reducing the acting force applied to the bus bar and the electrode terminal during the operation, is beneficial to reducing the adverse influence on the operation accuracy caused by the displacement of the two due to force, and also reduces the risk of damage to the two due to force; by the method of first rough ablation and then fine ablation during the disassembly process, on the one hand, rough ablation is beneficial to accelerating the operation speed and improving the disassembly efficiency, on the other hand, it is beneficial to making the surface of the ablated part of the electrode terminal smooth, which is beneficial to reducing the difficulty of subsequent reuse of the electrode terminal, and is beneficial to making the size of the metal dust generated after ablation smaller.

[0007] In some embodiments, in the state of the rough ablation, the power value of the laser is the first power value, and in the state of the fine ablation, the power value of the laser is the second power value, and the first power value is greater than the second power value; and / or, in the state of the rough ablation, the scanning speed of the laser scanning the area to be processed is the first scanning speed, and in the state of the fine ablation, the scanning speed of the laser scanning the area to be processed is the second scanning speed, and the first scanning speed is less than the second scanning speed. In this way, it is beneficial to make the first ablation size larger than the second ablation size, and is beneficial to reducing the probability of over-ablation in the fine ablation stage of the area to be processed due to energy accumulation.

[0008] In some embodiments, in the fine ablation stage, the power value of the laser of the previous fine ablation is greater than the power value of the laser of the subsequent fine ablation. In this way, it is beneficial to make the surface roughness lower for each fine ablation.

[0009] In some embodiments, in the projection plane perpendicular to the first direction, the projection of the light spot formed by the laser on the area to be processed along the first direction reciprocates in a direction perpendicular to the first direction. In this way, the movement trajectory of the light spot is simple and easy to control, which is beneficial to making the light spot pass through all positions on the surface of the area to be processed, is beneficial to making the area to be processed uniformly thinned, and is also beneficial to reducing the probability of the light spot passing through some areas of the area to be processed repeatedly, and reducing the probability that the size of the area to be processed reduced due to heat accumulation exceeds the first ablation size and the second ablation size.

[0010] In some embodiments, in the projection plane perpendicular to the first direction, the projection of the light spot formed by the laser on the area to be processed along the first direction moves in a spiral motion. In this way, it is beneficial to making the light spot continuously pass through the surface of the area to be processed, is beneficial to improving the processing efficiency, and is also beneficial to reducing the probability of the light spot passing through some areas of the area to be processed repeatedly, and reducing the probability that the size of the area to be processed reduced due to heat accumulation exceeds the first ablation size and the second ablation size.

[0011] In some embodiments, controlling the projection spiral movement of the light spot formed by the laser on the area to be processed specifically includes: Obtaining the current trajectory radius of the projection of the light spot along the first direction at the current position; Determining that the current trajectory radius is not greater than 6 mm; Controlling the scanning speed of the laser scanning the area to be processed to be not less than 100 rad / s.

[0012] In this way, it is beneficial to reduce the energy accumulation at the trajectory center of the projection spiral movement, and it is beneficial to make the reduced thickness at the trajectory center of the projection spiral movement meet the requirements of the first ablation size or the second ablation size after ablation.

[0013] In some embodiments, before the preparation stage, the disassembly method further includes: Determining that the liquid injection hole sealing area of the battery cell is located outside the area to be processed.

[0014] In this way, it is beneficial to reduce the probability of problems such as damage to internal components of the battery cell and leakage of electrolyte caused by the laser directly burning through the liquid injection hole sealing area.

[0015] In some embodiments, determining the position of the area to be processed specifically includes: Obtaining a two-dimensional planar image of the surface of the bus bar along the first direction toward the laser emission area side, and determining the projection range of the area to be processed according to the two-dimensional planar image; Obtaining a three-dimensional contour image of the surfaces of the bus bar and the electrode terminal on the side close to the laser emission area; Selecting at least three reference points from the part of the three-dimensional contour image outside the projection range of the welding area, and forming a reference plane according to the positions of the respective reference points; Determining the contour of the surface of the area to be processed on the side close to the laser emission area according to the three-dimensional contour image, the reference plane, and a preset height limit value; Obtaining the thickness dimension according to the contour of the surface of the area to be processed on the side close to the laser emission area and the contour of the surface of the electrode terminal on the side close to the laser emission area.

[0016] In this way, the actual size of the area to be processed along the first direction after welding can be obtained, which is beneficial to improving the processing accuracy of subsequent ablation operations and beneficial to making the surface roughness of the finally processed electrode terminal lower.

[0017] In some embodiments, in the state of rough ablation, the power range of the laser is from 1600W to 2000W; and / or, the scanning speed range of the laser scanning the area to be processed is from 10000mm / s to 14000mm / s. Thus, it is beneficial to enable the energy of the laser to meet the requirement of the reduced size of the area to be processed after one-time rough ablation and the requirement of the operation efficiency.

[0018] In some embodiments, in the state of rough ablation, the power range of the laser is from 1700W to 1900W; and / or, the scanning speed range of the laser scanning the area to be processed is from 11000mm / s to 13000mm / s. Thus, it is further beneficial to enable the energy of the laser to meet the requirement of the reduced size of the area to be processed after one-time rough ablation and the requirement of the operation efficiency.

[0019] In some embodiments, in the state of fine ablation, the power range of the laser is from 800W to 1800W; and / or, the scanning speed range of the laser scanning the area to be processed is from 13000mm / s to 17000mm / s. Thus, it is beneficial to enable the energy of the laser to meet the requirement of the reduced size of the area to be processed after one-time fine ablation, so as to reduce the surface roughness after ablation.

[0020] In some embodiments, in the state of fine ablation, the power range of the laser is from 900W to 1700W; and / or, the scanning speed range of the laser scanning the area to be processed is from 14000mm / s to 16000mm / s. Thus, it is further beneficial to enable the energy of the laser to meet the requirement of the reduced size of the area to be processed after one-time fine ablation.

[0021] The embodiment of the present application further provides a control device, including a memory and a processor, the memory stores a control program, and when the processor executes the control program, the steps of the disassembly method in any one of the foregoing embodiments are realized.

[0022] The embodiment of the present application further provides a storage medium, storing a control program, and when the control program is executed by a processor, the steps of the disassembly method in any one of the foregoing embodiments are realized.

[0023] The embodiment of the present application further provides a disassembly device for a battery device, the disassembly device is used to execute the disassembly method in any one of the foregoing embodiments, and the disassembly device includes: A laser generating device; A cleaning device, comprising a first isolation cover and an air flow generating device. A first cavity is provided inside the first isolation cover. The first cavity is provided with a first air outlet, a first light inlet, and a first light outlet. The first air outlet is communicated with the air flow generating device. The air flow generating device evacuates the air inside the first cavity through the first air outlet. The first light inlet and the first light outlet are arranged opposite to each other. The laser emitted by the laser generating device passes through the first cavity via the first light inlet and the first light outlet for irradiating a to-be-treated area formed after the welding of a bus bar and an electrode terminal in a battery device.

[0024] In the disassembling device in the embodiments of the present application, through the shielding of the first isolation cover and the direct evacuation of the air inside the first cavity by the air flow generating device, it is difficult for the metal dust generated during the laser ablation process to diffuse outside the isolation cover, which is beneficial to reducing the adverse effects of the diffusion of metal dust on the surrounding environment and other components in the disassembling device.

[0025] In some embodiments, the first cavity is further provided with a first air inlet. The first air inlet is communicated with the air flow generating device. The air flow generating device conveys air into the first cavity through the first air inlet. By directly conveying air into the first cavity, the air can directly blow the inner wall of the first cavity and the surface of the bus bar, which is beneficial to reducing the probability of metal dust adhering to the bus bar and the inner wall of the first cavity and is beneficial to making the metal dust enter the first air outlet along with the air flow.

[0026] In some embodiments, the first light inlet and the first light outlet are arranged along a first direction. The first air outlet is located on one side of the first cavity along a second direction. The first direction intersects with the second direction. In this way, it is beneficial to reducing the disturbance of the air flow generated by the first air outlet to the laser emission area, and it is also beneficial to the scattered metal dust to enter the first air outlet faster.

[0027] In some embodiments, the cleaning device further comprises a second isolation cover. The second isolation cover is arranged between the laser emission area of the laser generating device and the first isolation cover. A second cavity is provided inside the second isolation cover. The second cavity is provided with a second air outlet, a second light inlet, and a second light outlet. The air flow generating device evacuates the air inside the second cavity through the second air outlet. The laser emitted by the laser generating device passes through the second cavity via the second light inlet and the second light outlet. In this way, it is possible to evacuate the dust particles in the suspended air inside the second cavity by the air flow generating device, which is beneficial to reducing the energy loss caused by part of the laser being blocked by the dust particles, improving the accuracy of laser ablation, and also beneficial to further evacuating the diffused metal powder.

[0028] In some embodiments, the disassembling device further includes a two-dimensional image acquisition device and a three-dimensional contour acquisition device. The laser generating device emits laser along a first direction. The two-dimensional image acquisition device is configured to acquire a two-dimensional planar image of the surface of the bus bar on the side facing the laser emission area along the first direction, and the three-dimensional contour acquisition device is configured to acquire a three-dimensional contour image of the bus bar. Thus, the specific position of the area to be processed can be obtained through the two-dimensional image acquisition device, so as to move the laser emission area to one side of the area to be processed along the first direction; through the three-dimensional contour acquisition device, a three-dimensional contour image of the bus bar is acquired, so as to obtain the contour and thickness dimension of the surface of the area to be processed close to the laser emission area. Description of the Drawings

[0029] Figure 1 Schematic diagram of a vehicle in an embodiment of the present application; Figure 2 Schematic diagram of a battery device in an embodiment of the present application; Figure 3 Schematic diagram of a disassembling method in an embodiment of the present application; Figure 4 Schematic diagram of laser ablation of the area to be processed in an embodiment of the present application; Figure 5 For Figure 4 Schematic diagram of the bus bar and the electrode terminal after the fine ablation stage in Figure 6 For Figure 4 In the embodiment, at position A, two rough ablations in the rough ablation stage cause the area to be processed to drop by the first ablation size; Figure 7 For Figure 4 In the embodiment, at position B, two fine ablations in the fine ablation stage cause the area to be processed to drop by the second ablation size; Figure 8 Schematic diagram of the trajectory of the reciprocating movement of the light spot formed by the laser in the area to be processed in an embodiment of the present application; Figure 9 Schematic diagram of the trajectory of the spiral movement of the light spot formed by the laser in the area to be processed in an embodiment of the present application; Figure 10 Two-dimensional planar image of the area to be processed obtained in an embodiment of the present application; Figure 11 Three-dimensional contour image of the area to be processed obtained in an embodiment of the present application; Figure 12 Schematic diagram of the disassembling device, battery cell and bus bar in an embodiment of the present application; Figure 13 For Figure 12 Partial enlarged schematic diagram of position C in Figure 14 Schematic diagram of the disassembling device in Figure 14 from another perspective; Figure 12 Figure 15 Schematic diagram of the disassembling device in Figure 12 from another perspective; Figure 14 Enlarged partial view of position D in Figure 14 ; Figure 16 Schematic diagram of the first isolation cover and the second isolation cover in an embodiment of the present application; Figure 17 Schematic diagram of the embodiment of from another perspective; Figure 16 Figure 18 Schematic diagram of the cross-section taken along the E-E position in ; Figure 17

[0030] Description of reference numerals 1000, vehicle; 100, battery device; 110, battery cell; 110a, liquid injection hole sealing area; 1101, electrode terminal; 120, box body; 1201, first box body; 1202, second box body; 130, bus bar; 130a, area to be processed; 130b, reference plane; 200, controller; 300, motor; 10, laser generating device; 11, laser emitting area; 11a, laser; 11b, light spot; 20, cleaning device; 21, first isolation cover; 21a, first cavity; 21aa, guiding inclined plane; 21b, first air outlet; 21c, first light inlet; 21d, first light outlet; 21e, first air inlet; 22, air flow generating device; 23, second isolation cover; 23a, second cavity; 23b, second air outlet; 23c, second light inlet; 23d, second light outlet; 24, air curtain assembly; 30, two-dimensional image acquisition device; 31, first baffle; 40, three-dimensional contour acquisition device; 41, second baffle; 50, three-dimensional driving device; 51, first driving mechanism; 52, second driving mechanism; 53, third driving mechanism; 60, mounting seat; 70, carrier. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments may be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and drawings of this application are intended to cover non-exclusive inclusion.

[0033] ​​​In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the description of the embodiments of the present application, for the convenience of explanation, as shown in the drawings of the specification, the direction of arrow X is the "first direction"; the direction of arrow Y is the "second direction"; and the direction of arrow Z is the "third direction".

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0039] See also Figure 2, the battery apparatus 100 mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 110, and the plurality of battery cells 110 are connected in series, parallel or in a hybrid connection through a busbar component.

[0040] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 110.

[0041] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 110 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 110 with cable ties.

[0042] In some embodiments, the battery apparatus 100 may be a battery pack, and the battery pack includes a box body 120 and one or more battery cell assemblies, and the battery cell 110 assemblies are accommodated in the box body 120.

[0043] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 120 by fixing the battery module in the box body 120.

[0044] As an example, the battery cell 110 assemblies may also be accommodated in the box body 120 by directly fixing a plurality of battery cells 110 to the box body 120.

[0045] As an example, referring to Figure 2 , the box body 120 may include a first box body 1201 and a second box body 1202. The first box body 1201 and the second box body 1202 are snapped together so that a closed space is formed inside the box body 120 to accommodate the battery cell 110 assemblies. The "closed" here means covered or closed, which can be sealed or non-sealed. The first box body 1201 may be a top cover or a bottom plate.

[0046] As an example, the box body 120 may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body 120 to accommodate the battery cell 110 assemblies.

[0047] In some embodiments, the box body 120 may be part of the chassis structure of the vehicle 1000. For example, a part of the box body 120 may become at least a part of the floor of the vehicle 1000, or a part of the box body 120 may become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0048] In the embodiments of the present application, the battery cell 110 may be a secondary battery, which refers to a battery cell 110 that can be activated by charging after discharging so that the active material can be reused.

[0049] The battery cell 110 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0050] As an example, the battery cell 110 may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc., and the present application has no special limitation.

[0051] In some embodiments, the housing of the battery cell 110 includes an end cap and a housing. The housing is provided with an opening, and the end cap covers the opening. The housing may be provided with one or more openings. One or more end caps may also be provided.

[0052] In some embodiments, at least one electrode terminal 1101 is provided on the housing of the battery cell 110, and the electrode terminal 1101 is electrically connected to the tab inside the housing. The electrode terminal 1101 may be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal 1101 may be provided on the end cap or on the housing.

[0053] In the following embodiments, for the convenience of description, the electrical device in an embodiment of the present application is taken as an example of a vehicle 1000 for description. The following is described with reference to the drawings.

[0054] Figure 1 It is a schematic structural diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As Figure 1 shown, a battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used for power supply of the vehicle 1000. For example, the battery device 100 may be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0055] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] Next, the embodiments of the present application will be described in detail.

[0057] In the related art, after the completion of each assembly process of the battery device, it is necessary to detect the quality of the finished product of this assembly process to determine whether the final obtained finished product of the battery device can meet the design requirements.

[0058] For the finished products and semi-finished products of the battery device that fail to pass the quality inspection, it is necessary to disassemble them and recycle the parts that can be reused to reduce costs.

[0059] Inside the battery device, the electrode terminal of the battery cell is fixed and electrically connected to the bus bar by welding. After the welding of the two is completed, if the welding quality does not meet the standard, it is necessary to separate the electrode terminal from the bus bar again. And the manufacturing cost of the battery cell is relatively high, and it is necessary to reduce the damage to the electrode terminal during the process of separating the electrode terminal from the bus bar.

[0060] The embodiment of the present application aims to provide a disassembly method for a battery device, which is used to separate the bus bar from the electrode terminal of the battery cell. By laser ablation of the area to be processed of the bus bar and dividing the laser ablation process into two stages with different ablation sizes, it is beneficial to reduce the damage to the electrode terminal during the process of separating the bus bar from the electrode terminal of the battery cell, and it is beneficial to make the surface of the separated electrode terminal flat, which is convenient for subsequent reuse.

[0061] Specifically, referring to Figures 3 to 7 , the embodiment of the present application provides a disassembly method for a battery device 100, which is used to separate the bus bar 130 from the electrode terminal 1101 of the battery cell 110. The disassembly method includes: S10: Preparation stage: Determine the position of the area to be processed 130a formed after the welding of the bus bar 130 and the electrode terminal 1101, and obtain the thickness dimension of the bus bar 130 in the first direction.

[0062] In the related art, the welded part formed after the welding of the bus bar 130 and the electrode terminal 1101 passes through the bus bar 130 in the first direction and connects the electrode terminal 1101.

[0063] The position of the area to be processed 130a formed after the welding of the bus bar 130 and the electrode terminal 1101 refers to at least part of the welding area formed between the bus bar 130 and the electrode terminal 1101 after the welding is completed.

[0064] The laser 11a is emitted through the laser emission area 11 of the laser generating device 10. The laser emission area 11, that is, the part of the laser generating device 10 that can emit the laser 11a, such as the lens of the galvanometer module of the laser generating device 10.

[0065] The first direction is the stacking direction between the bus bar 130 and the electrode terminal 1101.

[0066] By obtaining the thickness dimension of the bus bar 130 in the first direction, the depth of the structure to be ablated in the first direction can be obtained. It can be understood that after this part of the structure is ablated, the bus bar 130 and the electrode terminal 1101 can be separated.

[0067] S20: Coarse ablation stage: Determine the number of coarse ablations according to the thickness dimension, emit the laser 11a towards the area to be processed 130a to complete the corresponding number of coarse ablations, and the ablation dimension of a single coarse ablation in the first direction is the first ablation dimension.

[0068] The laser 11a forms a light spot 11b on the surface of the area to be processed 130a in the first direction. The laser 11a can transfer energy to the part where the light spot 11b is formed, so that this part is heated, raised in temperature, melted until vaporized, thereby reducing the structure of the area to be processed 130a.

[0069] One ablation refers to that the light spot 11b formed by the laser generating device 10 on the surface of the area to be processed 130a scans across the entire surface of the area to be processed 130a along a predetermined path.

[0070] Refer to Figure 6 , after completing one coarse ablation, the dimension of the area to be processed 130a in the first direction can be reduced by the first ablation dimension, that is, the first ablation dimension is L1.

[0071] S30: Fine ablation stage: Determine the number of fine ablations according to the thickness dimension, the number of coarse ablations, and the first ablation dimension, emit the laser 11a towards the area to be processed 130a to complete the corresponding number of fine ablations, and the ablation dimension of a single fine ablation in the first direction is the second ablation dimension, and the second ablation dimension is smaller than the first ablation dimension.

[0072] Refer to Figure 7 , after completing one fine ablation, the dimension of the area to be processed 130a in the first direction can be reduced by the second ablation dimension, that is, the second ablation dimension is L2.

[0073] It can be understood that after completing the fine ablation stage, a through hole penetrating in the first direction is formed in the bus bar 130, so that the bus bar 130 and the electrode terminal 1101 are no longer connected, and the bus bar 130 can be separated from the electrode terminal 1101.

[0074] It can be understood that in the fine ablation stage, the laser 11a can ablate the electrode terminal 1101 to form a through hole in the bus bar 130.

[0075] It can be understood that since the second ablation size is smaller than the first ablation size, the flatness of the bottom surface of the formed blind hole after fine ablation is better.

[0076] In the disassembly method of the battery device 100 in the embodiment of the present application, by adopting the ablation method of the laser 11a, it is beneficial to reduce the acting force applied to the bus bar 130 and the electrode terminal 1101 during the operation, which is beneficial to reducing the adverse influence on the operation accuracy caused by the displacement of the two due to the force, and also reduces the risk of damage to the two due to the force; by the method of first rough ablation and then fine ablation during the disassembly process, on the one hand, the rough ablation is beneficial to accelerating the operation speed and improving the disassembly efficiency, and on the other hand, it is beneficial to make the surface of the ablated part of the electrode terminal 1101 smooth, which is beneficial to reducing the difficulty of subsequent reuse of the electrode terminal 1101, and is beneficial to making the size of the metal dust generated after ablation smaller.

[0077] In some embodiments, the preparation stage further includes driving the laser emission area 11 of the laser generating device 10 to be located on one side of the area to be processed 130a along the first direction, so that the laser 11a directly irradiates the area to be processed 130a along the first direction, reducing the loss power of the laser 11a during the propagation process.

[0078] In some embodiments, in the state of rough ablation, the power value of the laser 11a is the first power value, and in the state of fine ablation, the power value of the laser 11a is the second power value, and the first power value is greater than the second power value.

[0079] In this way, it is beneficial to make the first ablation size larger than the second ablation size.

[0080] In some embodiments, in the state of rough ablation, the scanning speed of the laser 11a scanning the area to be processed 130a is the first scanning speed, and in the state of fine ablation, the scanning speed of the laser 11a scanning the area to be processed 130a is the second scanning speed, and the first scanning speed is less than the second scanning speed.

[0081] In this way, it is beneficial to make the first ablation size larger than the second ablation size, and it is beneficial to reduce the probability of over-ablation of the area to be processed 130a in the fine ablation stage due to energy accumulation.

[0082] In the rough ablation stage, the specific number of times of rough ablation is not limited, and it can be once, or multiple times, such as twice, three times, four times, five times, five times, six times, seven times, etc.

[0083] In some embodiments, the power of the laser 11a for each rough ablation is the same, which is conducive to simplifying the operation steps and improving the efficiency.

[0084] In some embodiments, the scanning speed of the laser 11a for each rough ablation to scan the area to be processed 130a is the same, which is conducive to simplifying the operation steps and improving the efficiency.

[0085] In the fine ablation stage, the specific number of times of fine ablation is not limited, and it can be one time, or multiple times, such as two times, three times, four times, five times, five times, six times, seven times, etc.

[0086] In some embodiments, in the fine ablation stage, the power value of the laser 11a for the previous fine ablation is greater than the power value of the laser 11a for the subsequent fine ablation.

[0087] As a result, the second ablation size ablated by the subsequent fine ablation is smaller than the second ablation size ablated by the previous fine ablation.

[0088] In this way, it is beneficial to make the surface roughness lower for each fine ablation.

[0089] In some embodiments, referring to Figure 8 , in the projection plane perpendicular to the first direction, control the projection of the light spot 11b formed by the laser 11a on the area to be processed 130a to reciprocate in a direction perpendicular to the first direction. In Figure 8 , the dotted arrow is the sweeping trajectory of the light spot 11b on the area to be processed 130a.

[0090] In this way, the movement trajectory of the light spot 11b is simple and easy to control, which is conducive to enabling the light spot 11b to pass through all positions on the surface of the area to be processed 130a, conducive to uniformly thinning the area to be processed 130a, and also conducive to reducing the probability that the light spot 11b repeatedly passes through some areas of the area to be processed 130a, and reducing the probability that the size of the area to be processed 130a cut due to heat accumulation exceeds the first ablation size and the second ablation size.

[0091] During the reciprocating movement of the light spot 11b, after the light spot 11b leaves the surface of the area to be processed 130a, stop emitting the laser 11a, control the galvanometer for adjusting the emission direction of the laser 11a to reverse, and then emit the laser 11a again to reverse the movement of the light spot 11b and realize the reciprocating movement of the light spot 11b.

[0092] It can be understood that during one rough ablation process and during one fine ablation process, the light spot 11b can reciprocate in a direction perpendicular to the first direction respectively.

[0093] In some embodiments, referring to Figure 9, in the projection plane perpendicular to the first direction, control the projection of the light spot 11b formed by the laser 11a on the area to be processed 130a to move in a spiral along the first direction.

[0094] In this way, it is beneficial to enable the light spot 11b to continuously pass through the surface of the area to be processed 130a, which is beneficial to improving the processing efficiency. It is also beneficial to reduce the probability that the light spot 11b repeatedly passes through some areas of the area to be processed 130a, and reduce the probability that the size of the area to be processed 130a cut due to heat accumulation exceeds the first ablation size and the second ablation size.

[0095] It can be understood that the spiral movement of the projection of the light spot 11b is applicable to the embodiments where the projection of the area to be processed 130a along the first direction is circular or elliptical.

[0096] It can be understood that during a rough ablation process and during a fine ablation process, the projection of the light spot 11b can move in a spiral respectively.

[0097] In some embodiments, controlling the spiral movement of the projection of the light spot 11b formed by the laser 11a on the area to be processed 130a specifically includes: Obtain the current trajectory radius of the projection of the light spot 11b along the first direction at the current position; determine that the current trajectory radius is not greater than 6 mm; control the scanning speed of the laser 11a scanning the area to be processed 130a to be not less than 100 rad / s (radian per second).

[0098] It can be understood that since the trajectory is spiral, when the trajectory of the light spot 11b is constantly changing and gradually increasing from the inside out, the current trajectory radius refers to the radius corresponding to the trajectory of the light spot 11b at a certain moment. The smaller the current trajectory radius, the easier the heat generated by the laser 11a accumulates at the center position of the trajectory.

[0099] In this way, it is beneficial to reduce the energy accumulation at the center of the spiral movement of the projection, and it is beneficial to make the thickness reduced at the center of the spiral movement of the projection meet the requirements of the first ablation size or the second ablation size after ablation.

[0100] The scanning speed of the laser 11a scanning the area to be processed 130a can be 100 rad / s, 110 rad / s, 120 rad / s, 130 rad / s, 140 rad / s, 150 rad / s.

[0101] In some embodiments, before the preparation stage, the disassembly method further includes: determining that the liquid injection hole sealing area 110a of the battery cell 110 is located outside the area to be processed 130a.

[0102] The liquid injection hole is used to inject electrolyte into the battery cell 110. It can be understood that after the battery cell 110 is assembled, the liquid injection hole is sealed to reduce the probability of electrolyte leakage from the battery cell 110.

[0103] The liquid injection hole sealing area 110a refers to the physical structure for sealing the liquid injection hole.

[0104] It can be understood that in the case where the battery cell 110 has assembly quality problems, the area for sealing the liquid injection hole may at least partially coincide with the area to be processed 130a.

[0105] In this way, it is beneficial to reduce the probability of problems such as damage to the components inside the battery cell 110 and electrolyte leakage caused by the laser 11a directly burning through the liquid injection hole sealing area 110a.

[0106] In some embodiments, to determine the position of the area to be processed 130a, refer to Figure 10 and Figure 11 , specifically including: S11: Obtain a two-dimensional planar image of the surface of the bus bar 130 on the side of the emission area of the laser 11a in the first direction towards the emission area, and determine the projection range of the welding area according to the two-dimensional planar image.

[0107] The emission area of the laser 11a, that is, the laser emission area 11.

[0108] It can be understood that there are obvious differences in the surface topography between the welding area and the part of the surface of the bus bar 130 that has not been welded.

[0109] S12: Obtain a three-dimensional contour image of the bus bar 130.

[0110] It can be understood that due to the influence of high temperature and welding quality problems during the welding of the bus bar 130 with the electrode terminal 1101, the dimension of the bus bar 130 in the first direction changes and has a large deviation from the designed dimension. Therefore, by obtaining the three-dimensional contour image of the bus bar 130, the actual dimensions of each part of the bus bar 130 in the first direction can be obtained.

[0111] S13: Select at least three reference points from the part of the three-dimensional contour image outside the projection range of the welding area, and form a reference plane 130b according to the positions of the respective reference points.

[0112] It can be understood that at least three reference points are not on the same straight line.

[0113] S14: Determine the contour of the surface of the area to be processed 130a on the side close to the emission area of the laser 11a based on the three-dimensional contour image, the reference plane 130b, and the preset height limit value. By means of the reference plane 130b and the preset height value, filter out the contour surface on the three-dimensional contour image that is not lower than the preset height limit value of the reference plane 130b in the first direction, and the corresponding part of this contour surface in the first direction is the area to be processed 130a.

[0114] S15: Obtain the thickness dimension based on the contour of the surface of the area to be processed 130a on the side close to the emission area of the laser and the contour of the surface of the electrode terminal 1101 on the side close to the emission area of the laser 11a.

[0115] For the contour of the surface of the area to be processed 130a on the side close to the emission area of the laser 11a and the contour of the surface of the electrode terminal 1101 on the side close to the emission area of the laser 11a, the dimension of both in the first direction is the thickness dimension.

[0116] In this way, the actual dimension of the area to be processed 130a in the first direction after welding can be obtained, which is beneficial to improving the processing accuracy of subsequent ablation operations and making the surface roughness of the finally processed electrode terminal 1101 lower.

[0117] In some embodiments, the range of the first ablation dimension is 0.04 mm (millimetre) to 0.08 mm.

[0118] In this way, it is beneficial to make the operation efficiency of ablating the area to be processed 130a meet the requirements and improve the separation efficiency between the electrode terminal 1101 and the bus bar 130.

[0119] In some embodiments, the range of the first ablation dimension is 0.05 mm (millimetre) to 0.07 mm.

[0120] In this way, it is beneficial to make the operation efficiency of ablating the area to be processed 130a meet the requirements and improve the separation efficiency between the electrode terminal 1101 and the bus bar 130.

[0121] The specific value of the first ablation dimension can be 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm.

[0122] There is no limit to the specific measurement method for measuring the first ablation dimension. For example, before a rough ablation, obtain the three-dimensional contour image of the area to be processed 130a through a three-dimensional contour measuring instrument or a three-dimensional camera. After completing a rough ablation, obtain the three-dimensional contour image of the area to be processed 130a again, and compare the difference in the highest point of the previous three-dimensional contour image in the first direction between the two three-dimensional contour images, so as to obtain the first ablation dimension.

[0123] In some embodiments, the range of the second ablation size is from 0.01 mm (millimetre) to 0.07 mm.

[0124] Thus, it is beneficial to make the operation efficiency of the ablation on the area to be processed 130a meet the requirements, improve the separation efficiency between the electrode terminal 1101 and the bus bar 130, and is also beneficial to make...

[0125] In some embodiments, the range of the second ablation size is from 0.02 mm to 0.04 mm.

[0126] Thus, it is beneficial to make the operation efficiency of the ablation on the area to be processed 130a meet the requirements and improve the separation efficiency between the electrode terminal 1101 and the bus bar 130.

[0127] The specific values of the second ablation size can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm.

[0128] There is no limit to the specific measurement method for measuring the second ablation size. For example, before a rough ablation, a three-dimensional contour image of the area to be processed 130a is obtained by a three-dimensional profilometer or a three-dimensional camera. After completing a rough ablation, a three-dimensional contour image of the area to be processed 130a is obtained again. By comparing the difference in the highest point of the previous three-dimensional contour image in the second direction between the two three-dimensional contour images, the second ablation size can be obtained.

[0129] In some embodiments, in the state of rough ablation, the power range of the laser 11a is from 1600 W (Watt) to 2000 W.

[0130] Thus, it is beneficial to make the energy of the laser 11a enable the reduced size of the area to be processed 130a after a rough ablation to meet the requirements of the first ablation size and the operation efficiency to meet the requirements.

[0131] In some embodiments, in the state of rough ablation, the power range of the laser 11a is from 1700 W to 1900 W.

[0132] Thus, it is further beneficial to make the energy of the laser 11a enable the reduced size of the area to be processed 130a after a rough ablation to meet the requirements of the first ablation size and the operation efficiency to meet the requirements.

[0133] In the state of rough ablation, the specific values of the power of the laser 11a are 1600 W, 1700 W, 1800 W, 1900 W, 2000 W, etc.

[0134] In some embodiments, the scanning speed of the laser 11a for scanning the area 130a to be processed ranges from 13,000 mm / s (millimetre per second) to 17,000 mm / s.

[0135] In this way, it is beneficial for the operation efficiency of ablating the area 130a to be processed to meet the requirements.

[0136] In some embodiments, the scanning speed of the laser 11a for scanning the area 130a to be processed ranges from 14,000 mm / s to 16,000 mm / s.

[0137] In this way, it is further beneficial for the operation efficiency of ablating the area 130a to be processed to meet the requirements, and it is also beneficial for the first ablation size to meet the requirements.

[0138] In the state of rough ablation, the specific values of the scanning speed of the laser 11a for scanning the area 130a to be processed can be 13,000 mm / s, 14,000 mm / s, 15,000 mm / s, 16,000 mm / s, 17,000 mm / s.

[0139] In some embodiments, in the state of fine ablation, the power range of the laser 11a is from 800 W to 1800 W.

[0140] In this way, it is beneficial to enable the energy of the laser 11a to make the reduced size of the area 130a to be processed after one-time fine ablation meet the requirements of the second ablation size, so as to reduce the surface roughness after ablation.

[0141] In some embodiments, in the state of fine ablation, the power range of the laser 11a is from 900 W to 1700 W.

[0142] In this way, it is further beneficial to enable the energy of the laser 11a to make the reduced size of the area 130a to be processed after one-time fine ablation meet the requirements of the second ablation size.

[0143] In the state of fine ablation, the specific values of the power of the laser 11a can be 800 W, 900 W, 1000 W, 1100 W, 1200 W, 1300 W, 1400 W, 1500 W, 1600 W, 1700 W, 1800 W.

[0144] In some embodiments, in the state of fine ablation, the scanning speed of the laser 11a for scanning the area 130a to be processed ranges from 13,000 mm / s to 17,000 mm / s.

[0145] In this way, it is beneficial to reduce the probability of over-ablation of the area 130a due to energy accumulation, and it is beneficial to meet the requirements of the second ablation size.

[0146] In some embodiments, in the state of fine ablation, the scanning speed of the laser 11a for scanning the area to be processed 130a ranges from 14000 mm / s to 16000 mm / s.

[0147] Thus, it is further beneficial to reduce the probability of excessive ablation of the area to be processed 130a due to energy accumulation, and is beneficial to meet the requirements of the second ablation size.

[0148] In the state of fine ablation, the specific values of the scanning speed of the laser 11a for scanning the area to be processed 130a can be 13000 mm / s, 14000 mm / s, 15000 mm / s, 16000 mm / s, 17000 mm / s.

[0149] It can be understood that the number of times of fine ablation is determined according to the remaining size obtained by subtracting the product of the first ablation size and the number of times of rough ablation from the thickness size.

[0150] In some implementations where the value of the second ablation size is fixed, the number of times of fine ablation can be obtained by dividing the remaining size by the second ablation size.

[0151] In some embodiments, the thickness size is 1.5 mm and the number of times of rough ablation is seven times.

[0152] In some embodiments, the thickness size is 1.2 mm and the number of times of rough ablation is five times.

[0153] The disassembly method of the battery device 100 in a specific embodiment of the present application specifically includes: Preparation stage: Determine the position of the area to be processed 130a formed after welding the bus bar 130 and the electrode terminal 1101, and obtain the thickness dimension of the area to be processed 130a in the first direction; Rough ablation stage: Determine the number of rough ablations according to the thickness dimension, emit the laser 11a towards the area to be processed 130a for rough ablation corresponding to the number of times, and the ablation dimension of a single rough ablation in the first direction is the first ablation dimension; Fine ablation stage: Determine the number of fine ablations according to the thickness dimension, the number of rough ablations, and the first ablation dimension, emit the laser 11a towards the area to be processed 130a to complete the corresponding number of fine ablations, and the ablation dimension of a single fine ablation in the first direction is the second ablation dimension, and the second ablation dimension is smaller than the first ablation dimension. In the state of rough ablation, the power range of the laser 11a is from 1700W to 1900W; the scanning speed range of the laser 11a scanning the area to be processed 130a is from 11000mm / s to 13000mm / s. In the state of fine ablation, the power range of the laser 11a is from 900W to 1700W; the scanning speed range of the laser 11a scanning the area to be processed 130a is from 14000mm / s to 16000mm / s. In the state of rough ablation, the power value of the laser 11a is the first power value, and in the state of fine ablation, the power value of the laser 11a is the second power value, and the first power value is greater than the second power value. In the state of rough ablation, the scanning speed of the laser 11a scanning the area to be processed 130a is the first scanning speed, and in the state of fine ablation, the scanning speed of the laser 11a scanning the area to be processed 130a is the second scanning speed, and the first scanning speed is less than the second scanning speed. In the fine ablation stage, the power value of the laser 11a of the previous fine ablation is greater than the power value of the laser 11a of the next fine ablation. Before the preparation stage, the disassembly method further includes: determining that the liquid injection hole sealing area 110a of the battery cell 110 is located outside the area to be processed 130a. In the projection plane perpendicular to the first direction, control the projection of the light spot 11b formed by the laser 11a on the area to be processed 130a to move spirally in the first direction. Controlling the spiral movement of the projection of the light spot 11b formed by the laser 11a on the area to be processed 130a specifically includes: obtaining the current trajectory radius of the projection of the light spot 11b in the first direction at the current position; determining that the current trajectory radius is not greater than 6mm; controlling the scanning speed of the laser 11a scanning the area to be processed 130a to be not less than 100rad / s. Before the preparation stage, the disassembly method further includes: determining that the liquid injection hole sealing area 110a of the battery cell 110 is located outside the area to be processed 130a.Determine the position of the area to be processed 130a, specifically including: obtaining a two-dimensional planar image of the surface of the bus bar 130 facing the laser emission area 11 along the first direction, and determining the projection range of the area to be processed 130a according to the two-dimensional planar image; obtaining a three-dimensional contour image of the bus bar 130; selecting at least three reference points from the part of the three-dimensional contour image outside the projection range of the welding area, and forming a reference plane 130b according to the positions of the respective reference points; determining the contour of the surface of the area to be processed 130a close to the laser emission area 11 according to the three-dimensional contour image, the reference plane 130b, and a preset height limit value; obtaining the thickness dimension according to the contour of the surface of the area to be processed 130a close to the laser emission area 11 and the contour of the surface of the electrode terminal 1101 close to the laser emission area 11.

[0154] In a specific embodiment of the present application, the specific number of times of rough ablation and fine ablation is shown in the following table.

[0155]

[0156] The embodiment of the present application further provides a control device, including a memory and a processor. The memory stores a control program, and when the processor executes the control program, the steps of the disassembly method in any one of the foregoing embodiments are implemented.

[0157] The processor, each functional module or each functional unit in any embodiment of the present application may include any one or more of the following integrations: general-purpose processor, application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), central processing unit (CPU), graphics processing unit (GPU), embedded neural network processor (neural-network processing units, NPU), controller 200, microcontroller 200, microprocessor, programmable logic device, discrete gate or transistor logic device, discrete hardware component, quantum computing-based data processing logic, artificial intelligence (AI) processor, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0158] An embodiment of the present application further provides a storage medium storing a control program, which, when executed by a processor, implements the steps of the disassembly method according to any one of the foregoing embodiments.

[0159] The memory or computer-readable storage medium in any embodiment of the present application may include at least one of non-volatile memory and volatile memory. The non-volatile memory includes the integration of one or more of the following: Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Ferromagnetic Random Access Memory (FRAM), Flash Memory, magnetic surface memory, optical disc, Compact Disc Read-Only Memory (CD-ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, Resistive Random Access Memory (ReRAM), Magnetoresistive Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene memory, volatile memory, etc. The volatile memory includes the integration of one or more of the following: Random Access Memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), etc.

[0160] An embodiment of the present application further provides a disassembling device for a battery device 100, which is used to execute the disassembly method according to any one of the foregoing embodiments. Refer to Figures 12 to 15 and this disassembling device includes a laser generating device 10 and a cleaning device 20.

[0161] The cleaning device 20 includes a first isolation cover 21 and an air flow generating device 22. A first cavity 21a is provided inside the first isolation cover 21. The first cavity 21a is provided with a first air outlet 21b, a first light inlet 21c, and a first light outlet 21d. The first air outlet 21b is communicated with the air flow generating device 22. The air flow generating device 22 extracts the air inside the first cavity 21a through the first air outlet 21b. The first light inlet 21c and the first light outlet 21d are oppositely arranged.

[0162] The laser 11a emitted by the laser generating device 10 passes through the first cavity 21a through the first light inlet 21c and the first light outlet 21d for irradiating the to-be-treated area 130a formed after the welding of the bus bar 130 and the electrode terminal 1101 in the battery device 100.

[0163] It can be understood that during the process of the laser 11a ablating the to-be-treated area 130a, in the projection plane perpendicular to the first direction, the projection of the to-be-treated area 130a along the first direction is within the projection range of the first light outlet 21d.

[0164] The air flow generating device 22 is used to generate an air flow so that the air inside the first cavity 21a can flow out of the first cavity 21a from the first air outlet 21b.

[0165] It can be understood that during the process of the laser 11a ablating the to-be-treated area 130a, the weld nugget formed by welding is reheated, melted, and vaporized again. The vaporized metal diffuses inside the first cavity 21a and is recooled to form metal dust.

[0166] In the disassembly device in the embodiment of the present application, through the shielding of the first isolation cover 21 and the direct extraction of the air inside the first cavity 21a by the air flow generating device 22, it is difficult for the metal dust generated during the laser 11a ablation process to diffuse outside the isolation cover, which is beneficial to reducing the adverse effects of the diffusion of metal dust on the surrounding environment and other devices in the disassembly device.

[0167] It can be understood that the disassembly device in the embodiment of the present application can be used to perform the disassembly method of the battery device 100 in any of the foregoing embodiments.

[0168] The specific type of the air flow generating device 22 is not limited, such as an air pump.

[0169] During the process of the laser 11a ablating the to-be-treated area 130a, the first isolation cover 21 covers the to-be-treated area 130a through the first light outlet 21d.

[0170] In some embodiments, refer to Figure 16, the first cavity 21a is further provided with a first air inlet 21e, and the first air inlet 21e is communicated with the air flow generating device 22. The air flow generating device 22 conveys air flow into the first cavity 21a through the first air inlet 21e.

[0171] By directly conveying the air flow into the first cavity 21a, the air flow can directly blow the inner wall of the first cavity 21a and the surface of the confluence member 130, which is beneficial to reducing the probability of metal dust adhering to the confluence member 130 and the inner wall of the first cavity 21a, and is beneficial to enabling the metal dust to enter the first air outlet 21b along with the air flow.

[0172] In some embodiments, refer to Figures 16 to 18 , the first air outlet 21b and the first air inlet 21e are arranged oppositely, which is beneficial to enabling the air flow flowing out from the first air outlet 21b to enter the first air inlet 21e as soon as possible, beneficial to reducing the reduction of the air flow velocity in the first cavity 21a, and improving the blowing effect of the air flow on the metal dust.

[0173] In some embodiments, refer to Figure 18 , the first light inlet 21c and the first light outlet 21d are arranged along the first direction, the first air outlet 21b is located on one side of the first cavity 21a along the second direction, and the first direction intersects with the second direction.

[0174] In this way, it is beneficial to reducing the disturbance generated by the air flow generated by the first air outlet 21b to the laser emission area 11, and it is also beneficial to enabling the scattered metal dust to enter the first air outlet 21b more quickly.

[0175] In some embodiments where the first air outlet 21b and the first air inlet 21e are arranged oppositely, refer to the figure, the first air outlet 21b and the second air inlet are located on opposite sides of the first cavity 21a along the second direction.

[0176] In some embodiments, refer to Figure 18 , along the first direction from the first light outlet 21d to the first light inlet 21c, the cross-section of the first cavity 21a perpendicular to the first direction gradually increases.

[0177] In this way, it is beneficial to enabling the diffused metal dust to be carried by the air flow and drawn out from the first air outlet 21b.

[0178] In some embodiments, refer to Figure 18, the inner wall of the first cavity 21a includes a diversion inclined surface 21aa. The diversion inclined surface 21aa is located on the opposite side of the first air inlet along the first direction and faces the first air inlet. The first air outlet is located on one side of the diversion inclined surface 21aa along the first direction. In this way, under the guidance of the diversion inclined surface 21aa, after the air flow enters the first cavity 21a from the first air inlet, it can enter the first air outlet as soon as possible, improving the efficiency of discharging metal powder from the first cavity 21a.

[0179] It can be understood that during the process of the laser 11a ablating the area to be processed 130a, the first isolation cover 21 needs to be as close as possible to the area to be processed 130a, which is beneficial for metal dust to enter the first cavity 21a.

[0180] In some embodiments, referring to Figures 15 to 18 , the cleaning device 20 further includes a second isolation cover 23. The second isolation cover 23 is disposed between the laser emission area 11 of the laser generating device 10 and the first isolation cover 21. A second cavity 23a is provided in the second isolation cover 23. The second cavity 23a is provided with a second air outlet 23b, a second light inlet 23c and a second light outlet 23d. The air flow generating device 22 evacuates the air in the second cavity 23a through the second air outlet 23b. The laser 11a emitted by the laser generating device 10 passes through the second cavity 23a through the second light inlet 23c and the second light outlet 23d.

[0181] It can be understood that at least part of the beam of the laser 11a is located in the second cavity 23a.

[0182] In this way, the dust particles in the suspended air in the second cavity 23a can be evacuated by the air flow generating device 22, which is beneficial to reducing the energy loss caused by part of the laser 11a being blocked by dust particles, improving the ablation accuracy of the laser 11a, and also beneficial to further evacuating the diffused metal powder.

[0183] In some embodiments, referring to Figure 13 and Figure 15 , the cleaning device 20 further includes an air curtain assembly 24. The air curtain assembly 24 is communicated with the air flow generating device 22 to generate an air curtain. The flowing direction of the air curtain is perpendicular to the first direction. The formed air curtain is located between the laser emission area 11 and the second light inlet 23c.

[0184] In this way, on the one hand, it is beneficial to reduce the probability of foreign objects floating in the air blocking the laser 11a, and on the other hand, it reduces the probability of floating metal dust adhering to the laser emission area 11.

[0185] In some embodiments, the disassembling device further includes a two-dimensional image acquisition device 30 and a three-dimensional contour acquisition device 40. The laser generating device 10 emits a laser 11a in a first direction. The two-dimensional image acquisition device 30 is configured to acquire a two-dimensional planar image of the surface of the current collector 130 on the side facing the emission area of the laser 11a in the first direction. The three-dimensional contour acquisition device 40 is configured to acquire a three-dimensional contour image of the current collector 130.

[0186] The two-dimensional planar image of the surface of the current collector 130 on the side facing the emission area of the laser 11a in the first direction, that is, the current collector 130 deviates from the electrode terminal in the first direction In this way, the specific position of the area to be processed 130a can be acquired by the two-dimensional image acquisition device 30, so as to move the laser emission area 11 to one side of the area to be processed 130a in the first direction; through the three-dimensional contour acquisition device 40, a three-dimensional contour image of the current collector 130 is acquired, so as to obtain the contour and thickness dimension of the surface of the area to be processed 130a close to the laser emission area 11.

[0187] The specific type of the two-dimensional image acquisition device 30 is not limited, such as a CCD (Charge Coupled Device) camera.

[0188] The specific type of the three-dimensional contour acquisition device 40 is not limited, such as a 3D camera, a 3D contour scanner, etc.

[0189] In some embodiments, the disassembling device further includes a first driver and a first baffle 31. The first baffle 31 is drivingly engaged with the driving end of the first driver to drive the first baffle 31 to move and switch between a first position and a second position. In a state where the first baffle 31 is in the first position, the first baffle 31 blocks the image acquisition area of the two-dimensional image acquisition device 30. In this way, it is beneficial to reduce the probability that high-temperature metal powder contacts the image acquisition area of the two-dimensional image acquisition device 30 and causes damage during the ablation of the laser 11a. It can be understood that in a state where the first baffle 31 is in the second position, the first baffle 31 does not block the image acquisition area of the two-dimensional image acquisition device 30.

[0190] In some embodiments, the disassembling device further includes a second driver and a second baffle 41. The second baffle 41 is drivingly engaged with the driving end of the second driver to drive the second baffle 41 to move and switch between a third position and a fourth position. In a state where the second baffle 41 is in the third position, the second baffle 41 shields the image acquisition area of the three-dimensional contour acquisition device 40. Thus, it is beneficial to reduce the probability that during the ablation of the laser 11a, the high-temperature metal powder contacts the image acquisition area of the three-dimensional contour acquisition device 40 and causes damage to it. It can be understood that in a state where the second baffle 41 is in the fourth position, the second baffle 41 does not shield the image acquisition area of the three-dimensional contour acquisition device 40.

[0191] In some embodiments, referring to Figure 12 and Figure 14 , the disassembling device includes a three-dimensional driving device 50. The three-dimensional driving device 50 includes a first driving mechanism 51, a second driving mechanism 52, and a third driving mechanism 53. The second driving mechanism 52 is drivingly engaged with the driving end of the third driving mechanism 53 to drive the second driving mechanism 52 to move linearly along a third direction. The first driving mechanism 51 is drivingly engaged with the driving end of the second driving mechanism 52 to drive the first driving mechanism 51 to move linearly along a second direction. Both the two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 are drivingly engaged with the driving end of the first driving mechanism 51 to drive the two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 to move along a first direction. The first direction, the second direction, and the third direction intersect with each other.

[0192] Thus, it is possible to enable the two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 to move in a three-dimensional space to meet the requirements for disassembling busbars 130 of different sizes and shapes from the electrode terminals 1101.

[0193] The specific type of the first driving mechanism 51 is not limited, such as an electric cylinder, a pneumatic cylinder, a linear module, etc.

[0194] The specific type of the second driving mechanism 52 is not limited, such as an electric cylinder, a pneumatic cylinder, a linear module, etc.

[0195] The specific type of the third driving mechanism 53 is not limited, such as an electric cylinder, a pneumatic cylinder, a linear module, etc.

[0196] Before the steps of the preparation stage, the battery device 100 to be processed is placed in a preset working area of the disassembling device. The three-dimensional driving device 50 drives the two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 to move to a preset detection position so that the two-dimensional image acquisition device 30 can acquire an image of the area 130a to be processed between the busbar 130 and the electrode terminal 1101.

[0197] In some embodiments, the laser generating device 10 includes a galvanometer module, the galvanometer module is provided with a lens, and the lens forms a laser emission area 11.

[0198] In some embodiments, referring to Figure 13 and Figure 16 , the disassembling device further includes a mounting base 60, and the first isolation cover 21 and the second isolation cover 23 are both arranged on the mounting base 60 so that their positions are fixed.

[0199] In some embodiments, the air curtain assembly 24 and the galvanometer module are both arranged on the mounting base 60. In this way, it is beneficial to keep the relative positions of the first isolation cover 21, the second isolation cover 23, the air curtain assembly 24 and the galvanometer module stable, and reduce the adverse effects of suspended dust and floating metal dust in the air on the galvanometer module.

[0200] In some embodiments, the air flow velocity at the first air outlet 21b is not less than 15 m / s (meter per second), so that it is beneficial to discharge the metal dust in the first cavity 21a more quickly from the first cavity 21a.

[0201] The air flow velocity at the first air outlet 21b can specifically be 15 m / s, 16 m / s, 17 m / s, 18 m / s, 19 m / s, 20 m / s.

[0202] In some embodiments, the air flow velocity at the first air inlet 21e is not less than 25 m / s (meter per second), so that it is beneficial for the air flow blown into the first cavity 21a to impact the metal dust adhering to the inner wall of the first cavity 21a, causing the metal dust to float again in the first cavity 21a and then be discharged from the first air inlet 21e.

[0203] The air flow velocity at the first air inlet 21e can specifically be 25 m / s, 26 m / s, 27 m / s, 28 m / s, 29 m / s, 30 m / s.

[0204] It can be understood that the air flow pipeline discharged from the first air outlet 21b enters the air flow generating device 22 after being filtered, and then returns to the first cavity 21a through the air flow pipeline and the nozzle via the first air inlet 21e.

[0205] In some embodiments, referring to Figure 12 , the disassembling device further includes a carrier 70, and the carrier 70 is used to place the battery cell 110 and drive the battery device 100 to move to a preset operation area.

[0206] In some embodiments, the disassembling device includes the control device in the foregoing embodiments.

[0207] The various embodiments / implementation manners provided in this application can be combined with each other without conflict.

[0208] The above are only the preferred embodiments of this application and are not used to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of this application shall be included within the protection scope of the embodiments of this application.

Claims

1. A disassembly method for a battery device, which is used to separate a bus bar from an electrode terminal of a battery cell, characterized in that, The disassembly method includes: Preparation stage: Determine the position of the area to be processed formed after the bus bar and the electrode terminal are welded, and obtain the thickness dimension of the area to be processed along the first direction; Rough ablation stage: Determine the number of times of rough ablation according to the thickness dimension, emit laser towards the area to be processed to complete the corresponding number of times of rough ablation, and the size of the rough ablation along the first direction for each time is the first ablation size; Fine ablation stage: Determine the number of times of fine ablation according to the thickness dimension, the number of times of rough ablation, and the first ablation size, emit laser towards the area to be processed to complete the corresponding number of times of fine ablation, and the size of the fine ablation along the first direction for each time is the second ablation size, and the second ablation size is smaller than the first ablation size.

2. The disassembly method according to claim 1, wherein In the state of rough ablation, the power value of the laser is the first power value, and in the state of fine ablation, the power value of the laser is the second power value, and the first power value is greater than the second power value; And / or, in the state of rough ablation, the scanning speed of the laser scanning the area to be processed is the first scanning speed, and in the state of fine ablation, the scanning speed of the laser scanning the area to be processed is the second scanning speed, and the first scanning speed is smaller than the second scanning speed.

3. The disassembly method according to claim 1, characterized in that, In the fine ablation stage, the power value of the laser for the previous fine ablation is greater than the power value of the laser for the next fine ablation.

4. The disassembly method according to claim 1, wherein In the projection plane perpendicular to the first direction, control the projection of the light spot formed by the laser on the area to be processed to reciprocate in a direction perpendicular to the first direction.

5. The disassembly method according to claim 1, characterized in that In the projection plane perpendicular to the first direction, control the projection of the light spot formed by the laser on the area to be processed to perform spiral motion.

6. The disassembly method according to claim 5, wherein, Controlling the projection of the light spot formed by the laser on the area to be processed to perform spiral motion specifically includes: Obtain the current trajectory radius of the projection of the light spot along the first direction at the current position; Determine that the current trajectory radius is not greater than 6 mm; Control the scanning speed of the laser scanning the area to be processed to be not less than 100 rad / s.

7. The disassembly method according to claim 1, characterized in that Before the preparation stage, the disassembly method further includes: Determine that the liquid injection hole sealing area of the battery cell is located outside the area to be processed.

8. The disassembly method according to claim 1, characterized in that, The obtaining of the thickness dimension of the area to be processed along the first direction specifically includes: Obtain the two-dimensional plane image of the surface of the bus bar on the side facing the laser emission area along the first direction, and determine the projection range of the area to be processed according to the two-dimensional plane image; Obtain the three-dimensional contour image of the surfaces of the bus bar and the electrode terminal on the side close to the laser emission area; Select at least three reference points from the part outside the projection range of the welding area in the three-dimensional contour image, and form a reference plane according to the positions of the respective reference points; Determine the contour of the surface of the area to be processed on the side close to the laser emission area according to the three-dimensional contour image, the reference plane, and the preset height limit value; Obtain the thickness dimension according to the contour of the surface of the area to be processed on the side close to the laser emission area and the contour of the surface of the electrode terminal on the side close to the laser emission area.

9. The disassembly method according to claim 1, characterized in that In the state of rough ablation, the power range of the laser is from 1600W to 2000W; and / or, the scanning speed range of the laser for scanning the area to be processed is from 10000mm / s to 14000mm / s.

10. The disassembly method according to claim 1, wherein In the state of rough ablation, the power range of the laser is from 1700W to 1900W; and / or, the scanning speed range of the laser for scanning the area to be processed is from 11000mm / s to 13000mm / s.

11. The disassembly method according to claim 1, characterized in that, In the state of fine ablation, the power range of the laser is from 800W to 1800W; and / or, the scanning speed range of the laser for scanning the area to be processed is from 13000mm / s to 17000mm / s.

12. The disassembly method according to claim 1, characterized in that, In the state of fine ablation, the power range of the laser is from 900W to 1700W; and / or, the scanning speed range of the laser for scanning the area to be processed is from 14000mm / s to 16000mm / s.

13. A control device, comprising a memory and a processor, wherein the memory stores a control program, characterized in that, When the processor executes the control program, it implements the steps of the disassembly method according to any one of claims 1-12.

14. A storage medium stores a control program, characterized in that, When the control program is executed by the processor, it implements the steps of the disassembly method according to any one of claims 1-12.

15. A disassembly device for a battery device, characterized in that, The disassembly device is used to execute the disassembly method according to any one of claims 1-12, and the disassembly device includes: a laser generating device; a cleaning device, including a first isolation cover and an air flow generating device. A first cavity is provided in the first isolation cover. The first cavity is provided with a first air outlet, a first light inlet and a first light outlet. The first air outlet is communicated with the air flow generating device. The air flow generating device evacuates the air in the first cavity through the first air outlet. The first light inlet and the first light outlet are oppositely arranged; The laser emitted by the laser generating device passes through the first cavity through the first light inlet and the first light outlet for irradiating the area to be processed formed after the bus bar and the electrode terminal are welded.

16. The disassembling device according to claim 15, characterized in that, The first cavity is further provided with a first air inlet, and the first air inlet is communicated with the air flow generating device. The air flow generating device conveys air into the first cavity through the first air inlet.

17. The disassembling device according to claim 15, characterized in that, The first light inlet and the first light outlet are arranged along a first direction, the first air outlet is located on one side of the first cavity along a second direction, and the first direction intersects with the second direction.

18. The disassembling device according to claim 15, characterized in that, The cleaning device further includes a second isolation cover, and the second isolation cover is arranged between the laser emission area of the laser generating device and the first isolation cover. A second cavity is provided in the second isolation cover. The second cavity is provided with a second air outlet, a second light inlet and a second light outlet. The air flow generating device evacuates the air in the second cavity through the second air outlet. The laser emitted by the laser generating device passes through the second cavity through the second light inlet and the second light outlet.

19. The disassembling device according to claim 15, characterized in that, The disassembling device further includes a two-dimensional image acquisition device and a three-dimensional contour acquisition device. The laser generating device emits laser along a first direction. The two-dimensional image acquisition device is used to acquire a two-dimensional planar image of the surface of the bus bar on the side facing the laser emission area along the first direction, and the three-dimensional contour acquisition device is used to acquire a three-dimensional contour image of the bus bar.

Images