Method for disassembling battery device, control device, storage medium, and disassembling device

Abstract

Embodiments of the present application provide a battery device disassembly method, a control device, a storage medium and a disassembly device. The disassembly method comprises the following steps: determining the position of a to-be-processed area formed after the welding of a busbar and an electrode terminal, and obtaining the thickness dimension of the to-be-processed area along a first direction; determining the number of rough ablation, and emitting laser to the to-be-processed area to complete the corresponding number of rough ablation, and the ablation size is a first ablation size; determining the number of fine ablation, and emitting laser to the to-be-processed area to complete the corresponding number of fine ablation, and the ablation size is a second ablation size, and the second ablation size is smaller than the first ablation size. The battery device disassembly method in the embodiments of the present application is beneficial to speed up the operation speed, is beneficial to subsequent reduce the difficulty of reusing the electrode terminal, and is beneficial to the smaller size of the metal dust generated after ablation.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a method for disassembling a battery device, a control device, a storage medium, and a disassembly device. Background Technology

[0002] After the battery assembly is completed, the assembly quality needs to be inspected. Battery assemblies that fail the inspection need to be reworked in order to recover reusable parts and reassemble them, thereby saving manufacturing and recycling costs.

[0003] The electrode terminals of the battery cell are connected to the busbar by welding. If the welding quality between the electrode terminals and the busbar is not up to standard, the electrode terminals need to be separated from the busbar for recycling. Summary of the Invention

[0004] In view of this, embodiments of this application aim to provide a method, control device, storage medium, and disassembly device for disassembling a battery device that facilitates the separation of electrode terminals from the busbar and makes recycling and reuse convenient.

[0005] To achieve this objective, the technical solution of this application embodiment is implemented as follows:

[0006] This application provides a method for disassembling a battery device, used to separate the busbar from the electrode terminals of the battery cell. The disassembly method includes:

[0007] Preparation phase: Determine the location of the area to be processed formed after welding the busbar and electrode terminals, and obtain the thickness dimension of the area to be processed along the first direction;

[0008] Coarse ablation stage: The number of coarse ablations is determined according to the thickness dimension, and a laser is emitted toward the area to be treated to complete the corresponding number of coarse ablations. The size of the coarse ablation in a single coarse ablation along the first direction is the first ablation size.

[0009] Fine ablation stage: The number of fine ablations is determined based on the thickness dimension, the number of coarse ablations, and the first ablation dimension. A laser is emitted toward the area to be treated to complete the corresponding number of fine ablations. The size of the ablation along the first direction in a single fine ablation is the second ablation dimension, which is smaller than the first ablation dimension.

[0010] The battery device disassembly method in this application embodiment, by employing laser ablation, helps to reduce the force applied to the busbar and electrode terminals during the operation, which helps to reduce the adverse effects on the operation accuracy caused by displacement of the two due to force, and also reduces the risk of damage to the two due to force. By first coarse ablation and then fine ablation during the disassembly process, on the one hand, coarse ablation helps to speed up the operation and improve the disassembly efficiency, and on the other hand, it helps to make the surface of the ablated part of the electrode terminal smooth, which helps to reduce the difficulty of subsequent reuse of the electrode terminal, and also helps to make the metal dust generated after ablation smaller in size.

[0011] In some embodiments, during the coarse ablation state, the laser power value is a first power value, and during the fine ablation state, the laser power value is a second power value, wherein the first power value is greater than the second power value; and / or, during the coarse ablation state, the laser scanning speed for the area to be treated is a first scanning speed, and during the fine ablation state, the laser scanning speed for the area to be treated is a second scanning speed, wherein the first scanning speed is less than the second scanning speed. This facilitates making the first ablation size larger than the second ablation size, and helps reduce the probability of over-ablation of the area to be treated during the fine ablation stage due to energy accumulation.

[0012] In some embodiments, during the fine ablation stage, the power value of the laser used in the previous fine ablation is greater than the power value of the laser used in the subsequent fine ablation. This is beneficial for achieving a lower surface roughness with each fine ablation.

[0013] In some embodiments, in a projection plane perpendicular to the first direction, the laser spot formed on the area to be treated is controlled to reciprocate along the projection of the laser beam in the first direction perpendicular to the first direction. This simplifies the trajectory of the laser spot, making it easy to control. It allows the laser spot to pass through all positions on the surface of the area to be treated, resulting in uniform thinning of the area. It also reduces the probability of the laser spot repeatedly passing through certain areas of the area to be treated, and decreases the probability that the area to be treated will be reduced beyond the first and second ablation dimensions due to heat accumulation.

[0014] In some embodiments, in a projection plane perpendicular to the first direction, the laser spot formed on the area to be processed is controlled to move in a projection spiral along the first direction. This allows the laser spot to continuously pass over the surface of the area to be processed, which is beneficial for improving processing efficiency. It also helps to reduce the probability that the laser spot repeatedly passes over parts of the area to be processed, and reduces the probability that the size of the area to be processed will be reduced beyond the first ablation size and the second ablation size due to heat accumulation.

[0015] In some embodiments, controlling the projected helical motion of the laser spot formed on the area to be processed specifically includes:

[0016] Obtain the current trajectory radius of the light spot projected along the first direction at the current position;

[0017] The radius of the current trajectory is determined to be no greater than 6 mm;

[0018] The scanning speed of the laser scanning of the area to be processed shall not be less than 100 rad / s.

[0019] This helps to reduce the energy accumulation at the center of the projection spiral motion trajectory, and helps to ensure that the thickness reduction at the center of the projection spiral motion trajectory after ablation meets the requirements of the first ablation size or the second ablation size.

[0020] In some embodiments, prior to the preparation phase, the disassembly method further includes:

[0021] It is determined that the liquid injection hole sealing area of ​​the battery cell is located outside the area to be processed.

[0022] This helps reduce the probability of damage to internal components and electrolyte leakage caused by laser directly burning through the sealing area of ​​the injection hole.

[0023] In some embodiments, determining the location of the region to be processed specifically includes:

[0024] A two-dimensional planar image of the surface of the busbar along the first direction toward the laser emission area is obtained, and the projection range of the area to be processed is determined based on the two-dimensional planar image.

[0025] Obtain a three-dimensional contour image of the surface of the bus and the electrode terminal on the side near the laser emission area;

[0026] In the three-dimensional contour image, at least three reference points are selected in the portion outside the projection range of the welding area, and a reference plane is formed according to the position of each of the reference points.

[0027] Based on the three-dimensional contour image, the reference plane, and the preset height limit, the contour of the surface of the area to be processed on the side closest to the laser emission area is determined;

[0028] The thickness dimension is obtained based on the contour of the surface of the area to be processed on the side closest to the laser emission area and the contour of the surface of the electrode terminal on the side closest to the laser emission area.

[0029] In this way, the actual dimensions of the area to be treated along the first direction after welding can be obtained, which is beneficial to improving the processing accuracy of subsequent ablation operations and to making the surface roughness of the electrode terminals obtained in the final process lower.

[0030] In some embodiments, during the coarse ablation state, the laser power ranges from 1600W to 2000W; and / or, the laser scanning speed of the area to be treated ranges from 10000mm / s to 14000mm / s. This allows the laser energy to achieve the desired reduction in size of the area to be treated after a single coarse ablation, meeting the requirements for the first ablation size while also satisfying the operational efficiency requirements.

[0031] In some embodiments, during the coarse ablation state, the laser power ranges from 1700W to 1900W; and / or, the laser scanning speed of the area to be treated ranges from 11000mm / s to 13000mm / s. This further facilitates ensuring that the laser energy is sufficient to achieve the required reduction in size of the area to be treated after a single coarse ablation, meeting the first ablation size requirement while maintaining the required operational efficiency.

[0032] In some embodiments, the laser power ranges from 800W to 1800W in the state of fine ablation.

[0033] And / or, the scanning speed of the laser scanning area to be processed ranges from 13000 mm / s to 17000 mm / s. This is beneficial because the laser energy can ensure that the size reduction of the area to be processed after one fine ablation meets the requirements of the second ablation size, thereby reducing the surface roughness after ablation.

[0034] In some embodiments, the laser power ranges from 900W to 1700W in the state of fine ablation;

[0035] And / or, the scanning speed of the laser scanning of the area to be treated ranges from 14000 mm / s to 16000 mm / s. This further facilitates ensuring that the laser energy is sufficient to achieve the required reduction in size of the area to be treated after a single fine ablation, meeting the requirements of the second ablation size.

[0036] This application also provides a control device, including a memory and a processor. The memory stores a control program, and when the processor executes the control program, it implements the steps of the disassembly method as described in any of the foregoing embodiments.

[0037] This application embodiment also provides a storage medium storing a control program, which, when executed by a processor, implements the steps of the disassembly method as described in any of the foregoing embodiments.

[0038] This application embodiment also provides a battery device disassembly apparatus, the disassembly apparatus being used to perform the disassembly method described in any of the foregoing embodiments, the disassembly apparatus comprising:

[0039] Laser generating equipment;

[0040] A cleaning device includes a first isolation cover and an airflow generating device. The first isolation cover has a first cavity. The first cavity has a first air outlet, a first light inlet and a first light outlet. The first air outlet is connected to the airflow generating device. The airflow generating device draws out the air in the first cavity through the first air outlet. The first light inlet and the first light outlet are arranged opposite to each other.

[0041] The laser emitted by the laser generating device passes through the first light inlet and the first light outlet through the first cavity to irradiate the area to be processed formed after the busbar and electrode terminals in the battery device are welded.

[0042] The disassembly device in this embodiment of the application directly extracts the air from the first cavity through the shielding of the first isolation cover and the airflow generating device, making it difficult for the metal dust generated during the laser ablation process to diffuse outside the isolation cover. This helps to reduce the adverse effects of the diffusion of metal dust on the surrounding environment and other components in the disassembly device.

[0043] In some embodiments, the first cavity is further provided with a first air inlet, which is connected to the airflow generating device. The airflow generating device delivers airflow into the first cavity through the first air inlet. By directly delivering airflow into the first cavity, the airflow can directly blow against the inner wall of the first cavity and the surface of the manifold, thereby reducing the probability of metal dust adhering to the manifold and the inner wall of the first cavity, and facilitating the entry of metal dust into the first air outlet with the airflow.

[0044] In some embodiments, the first light inlet and the first light outlet are arranged along a first direction, and the first air outlet is located on one side of the first cavity along a second direction, where the first direction intersects the second direction. This helps to reduce the disturbance of the airflow generated by the first air outlet on the laser emission area, and also helps the dispersed metal dust to enter the first air outlet more quickly.

[0045] In some embodiments, the cleaning device further includes a second isolation cover disposed between the laser emission area of ​​the laser generating device and the first isolation cover. The second isolation cover has a second cavity, which includes a second air outlet, a second light inlet, and a second light outlet. The airflow generating device draws air out of 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. This allows the airflow generating device to remove dust particles suspended in the second cavity, reducing energy loss caused by dust particles partially blocking the laser beam, improving the accuracy of laser ablation, and also facilitating the further removal of diffused metal powder.

[0046] In some embodiments, the disassembly apparatus further includes a two-dimensional image acquisition device and a three-dimensional contour acquisition device. The laser generating device emits laser light along a first direction. The two-dimensional image acquisition device is used to acquire a two-dimensional planar image of the surface of the busbar facing the laser emission area along the first direction. The three-dimensional contour acquisition device is used to acquire a three-dimensional contour image of the busbar. Thus, the two-dimensional image acquisition device can obtain the specific location of the area to be processed, so as to move the laser emission area to one side of the area to be processed along the first direction; the three-dimensional contour acquisition device acquires a three-dimensional contour image of the busbar, so as to obtain the contour and thickness dimensions of the surface of the area to be processed near the laser emission area. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a vehicle according to one embodiment of this application;

[0048] Figure 2 This is a schematic diagram of a battery device in one embodiment of this application;

[0049] Figure 3 This is a schematic diagram of a disassembly method in one embodiment of this application;

[0050] Figure 4 This is a schematic diagram of the laser ablation of the area to be processed in one embodiment of this application;

[0051] Figure 5 for Figure 4 A schematic diagram of the busbar and electrode terminals after the intermediate ablation stage is completed;

[0052] Figure 6 for Figure 4 In the example at location A, two coarse ablation processes during the coarse ablation stage cause the area to be treated to decrease by the first ablation size;

[0053] Figure 7 for Figure 4In the embodiment, at position B, two fine ablation processes during the fine ablation stage cause the area to be treated to decrease by the second ablation size.

[0054] Figure 8 This is a schematic diagram of the trajectory of the laser spot reciprocating in the area to be processed in one embodiment of this application;

[0055] Figure 9 This is a schematic diagram of the trajectory of the spiral motion of the laser spot formed by the laser in the area to be processed in one embodiment of this application;

[0056] Figure 10 This is a two-dimensional planar image of the area to be processed obtained in one embodiment of this application;

[0057] Figure 11 This is a three-dimensional contour image of the region to be processed obtained in one embodiment of this application;

[0058] Figure 12 This is a schematic diagram of a disassembly device, a battery cell, and a busbar in one embodiment of this application;

[0059] Figure 13 for Figure 12 A magnified view of the area at position C in the middle;

[0060] Figure 14 for Figure 12 A schematic diagram of the disassembly device from another perspective;

[0061] Figure 15 for Figure 14 A magnified view of a portion of position D;

[0062] Figure 16 This is a schematic diagram of a first isolation shield and a second isolation shield in one embodiment of this application;

[0063] Figure 17 for Figure 16 A schematic diagram of an embodiment from another perspective;

[0064] Figure 18 for Figure 17 Schematic diagram of the section at the EE position.

[0065] Explanation of reference numerals in the attached figures

[0066] 1000, Vehicle; 100, Battery Unit; 110, Battery Cell; 110a, Filler Hole Sealing Area; 1101, Electrode Terminal; 120, Housing; 1201, First Housing; 1202, Second Housing; 130, Busbar; 130a, Area to be Processed; 130b, Reference Plane; 200, Controller; 300, Motor; 10, Laser Generating Equipment; 11, Laser Emission Area; 11a, Laser; 11b, Laser Spot; 20, Cleaning Equipment; 21, First Isolation Shield; 21aa, First Cavity; 21aa, Guide Surface; 21b. 21c, First air outlet; 21d, First light inlet; 21e, First air inlet; 22, Airflow 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 base; 70, Carrier. Detailed Implementation

[0067] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and drawings of this application are intended to cover non-exclusive inclusion.

[0069] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0070] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0072] In the description of the embodiments of this application, for ease of explanation, as shown in the accompanying drawings, the direction of arrow X is referred to as the "first direction"; the direction of arrow Y is referred to as the "second direction"; and the direction of arrow Z is referred to as the "third direction".

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0075] See Figure 2 The battery device 100 mentioned in the embodiments of this application may include one or more battery cell 110 assemblies for providing voltage and capacity. The battery cell 110 assembly may include multiple battery cells 110, which are connected in series, parallel or mixed connection through a busbar.

[0076] In some embodiments, the battery cell assembly 110 is typically formed by arranging multiple battery cells 110.

[0077] As an example, the battery cell 110 assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 110 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 110 together with cable ties.

[0078] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 120 and one or more battery cell assemblies, with the battery cell assemblies 110 housed in the housing 120.

[0079] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 120 by fixing the battery module in the housing 120.

[0080] As an example, the battery cell 110 assembly can also be housed in the housing 120 by directly fixing multiple battery cells 110 to the housing 120.

[0081] As an example, see Figure 2 The housing 120 may include a first housing 1201 and a second housing 1202. The first housing 1201 and the second housing 1202 are fastened together to form a closed space inside the housing 120 to house the battery cells 110 assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 1201 may be a top cover or a bottom plate.

[0082] As an example, the housing 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 the interior of the housing 120 forms an enclosed space to house the battery cell 110 assembly.

[0083] In some embodiments, the housing 120 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 120 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 120 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0084] In this embodiment of the application, the battery cell 110 can be a secondary battery. A secondary battery refers to a battery cell 110 that can be used again after being discharged by recharging to activate the active materials.

[0085] The battery cell 110 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0086] As an example, the battery cell 110 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0087] In some embodiments, the housing of the battery cell 110 includes an end cap and a casing, the casing having an opening, and the end cap covering the opening. The casing may have one or more openings. The end cap may also be provided one or more.

[0088] In some embodiments, at least one electrode terminal 1101 is provided on the casing of the battery cell 110, and the electrode terminal 1101 is electrically connected to the tab inside the casing. The electrode terminal 1101 can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal 1101 can be provided on the end cap or on the housing.

[0089] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows with reference to the accompanying drawings.

[0090] Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Figure 1 As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0091] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0092] The embodiments of this application will now be described in detail.

[0093] In related technologies, after each assembly process of a battery device is completed, the quality of the finished product of that assembly process needs to be tested to determine whether the final battery device can meet the design requirements.

[0094] For finished and semi-finished battery devices that fail quality inspection, they need to be disassembled and the reusable parts recycled to reduce costs.

[0095] Within a battery assembly, the electrode terminals of a single battery cell are fixed and electrically connected to the current collector by welding. If the welding quality is substandard after welding, the electrode terminals and current collector need to be separated. However, the manufacturing cost of a single battery cell is relatively high, necessitating minimizing damage to the electrode terminals during the separation process.

[0096] This application aims to provide a method for disassembling a battery device, which is used to separate the electrode terminals of the current collector and the battery cell. The method involves laser ablation of the area to be processed in the current collector, and the laser ablation process is divided into two stages with different ablation sizes. This method helps to reduce damage to the electrode terminals during the separation of the current collector and the battery cell, and helps to make the surface of the separated electrode terminals flat, which is convenient for subsequent reuse.

[0097] Specifically, see Figures 3 to 7 This application provides a method for disassembling a battery device 100, used to separate the busbar 130 from the electrode terminals 1101 of the battery cell 110. The disassembly method includes:

[0098] S10: Preparation stage: Determine the position of the area to be processed 130a formed after the busbar 130 and electrode terminal 1101 are welded, and obtain the thickness dimension of the busbar 130 along the first direction.

[0099] In related technologies, after the busbar 130 and the electrode terminal 1101 are welded together, the welded portion forms through the busbar 130 and connects to the electrode terminal 1101 along a first direction.

[0100] The location of the area to be processed 130a formed after the busbar 130 and the electrode terminal 1101 are welded refers to at least a portion of the welded area formed by the busbar 130 and the electrode terminal 1101 after the welding is completed.

[0101] Laser 11a is emitted through the laser emitting region 11 of the laser generating device 10. The laser emitting region 11 is the part of the laser generating device 10 that can emit laser 11a, such as the lens of the galvanometer module of the laser generating device 10.

[0102] The first direction is the stacking direction between the busbar 130 and the electrode terminal 1101.

[0103] By obtaining the thickness dimension of the busbar 130 along the first direction, the depth of the structure to be ablated along the first direction can be obtained. It can be understood that after this part of the structure is ablated, the busbar 130 and the electrode terminal 1101 can be separated.

[0104] S20: Coarse ablation stage: The number of coarse ablation cycles is determined according to the thickness dimension. Laser 11a is emitted towards the area to be treated 130a to complete the corresponding number of coarse ablation cycles. The size of a single coarse ablation along the first direction is the first ablation size.

[0105] Laser 11a forms a spot 11b on the surface of the region 130a to be processed along the first direction. Laser 11a can transfer energy to the part where the spot 11b is formed, so that the part is heated up and melted until it vaporizes, thereby reducing the structure of the region 130a to be processed.

[0106] A single ablation refers to the laser spot 11b formed by the laser generator 10 on the surface of the area to be processed 130a scanning along a predetermined path across the entire surface of the area to be processed 130a.

[0107] See Figure 6 After completing one coarse ablation, the size of the area to be treated 130a along the first direction can be reduced by the first ablation size, that is, the first ablation size is L1.

[0108] S30: Fine ablation stage: The number of fine ablations is determined based on the thickness, the number of coarse ablations, and the first ablation size. Laser 11a is emitted toward the area to be treated 130a to complete the corresponding number of fine ablations. The size of a single fine ablation along the first direction is the second ablation size, which is smaller than the first ablation size.

[0109] See Figure 7 After completing one fine ablation, the size of the area to be treated 130a along the first direction can be reduced by the second ablation size, that is, the second ablation size is L2.

[0110] It is understandable that after the fine ablation stage is completed, a through hole is formed in the manifold 130 along the first direction, so that the manifold 130 is no longer connected to the electrode terminal 1101, and the manifold 130 can be separated from the electrode terminal 1101.

[0111] Understandably, during the fine ablation stage, laser 11a can ablate to electrode terminal 1101 to form a through hole in busbar 130.

[0112] Understandably, because the second ablation size is smaller than the first ablation size, the bottom surface of the blind hole formed after fine ablation has better flatness.

[0113] The disassembly method of the battery device 100 in this embodiment of the application, by using laser ablation 11a, helps to reduce the force applied to the busbar 130 and the electrode terminal 1101 during the operation, which helps to reduce the adverse effects on the operation accuracy caused by displacement of the two under force, and also reduces the risk of damage to the two under force. By first coarse ablation and then fine ablation during the disassembly process, on the one hand, coarse ablation helps to speed up the operation and improve the disassembly efficiency, and on the other hand, it helps to make the surface of the ablated part of the electrode terminal 1101 smooth, which helps to reduce the difficulty of subsequent reuse of the electrode terminal 1101, and also helps to make the metal dust generated after ablation smaller in size.

[0114] In some embodiments, the preparation stage further includes driving the laser emission area 11 of the laser generating device 10 to be processed on one side of the area 130a to be processed along the first direction, so that the laser 11a directly irradiates the area 130a to be processed along the first direction, thereby reducing the power loss of the laser 11a during propagation.

[0115] In some embodiments, the power value of laser 11a is a first power value in the coarse ablation state and a second power value in the fine ablation state, wherein the first power value is greater than the second power value.

[0116] This makes it easier to make the first ablation size larger than the second ablation size.

[0117] In some embodiments, under coarse ablation conditions, the scanning speed of the laser 11a scanning the area 130a to be processed is a first scanning speed, and under fine ablation conditions, the scanning speed of the laser 11a scanning the area 130a to be processed is a second scanning speed, wherein the first scanning speed is less than the second scanning speed.

[0118] This allows the first ablation size to be larger than the second ablation size, which helps reduce the probability of over-ablation of the treatment area 130a during the fine ablation stage due to energy accumulation.

[0119] In the coarse ablation stage, there is no limit to the number of coarse ablation operations performed; it can be performed once or multiple times, such as twice, three times, four times, five times, six times, seven times, etc.

[0120] In some embodiments, the power of the laser 11a is the same for each coarse ablation, which helps to simplify the operation steps and improve efficiency.

[0121] In some embodiments, the scanning speed of the laser 11a scanning the area to be treated 130a for each coarse ablation is the same, which helps to simplify the operation steps and improve efficiency.

[0122] During the fine ablation stage, there is no limit to the number of fine ablation operations; it can be performed once or multiple times, such as twice, three times, four times, five times, six times, or seven times.

[0123] In some embodiments, during the fine ablation stage, the power value of the laser 11a in the previous fine ablation is greater than the power value of the laser 11a in the subsequent fine ablation.

[0124] This results in the second ablation size of the subsequent fine ablation being smaller than the second ablation size of the previous fine ablation.

[0125] This allows for a lower surface roughness with each fine ablation.

[0126] In some embodiments, see Figure 8 In a projection plane perpendicular to the first direction, the laser spot 11b formed by the laser 11a on the area 130a to be processed is controlled to reciprocate along the projection of the laser 11a onto the area 130a to be processed, perpendicular to the first direction. Figure 8 In the image, the dashed arrow represents the sweep trajectory of light spot 11b across the area to be processed, 130a.

[0127] Thus, the movement trajectory of the light spot 11b is simple and easy to control, which is beneficial for the light spot 11b to pass through all positions on the surface of the area to be processed 130a, which is beneficial for the area to be processed 130a to be thinned uniformly, and also helps to reduce the probability that the light spot 11b repeatedly passes through some areas of the area to be processed 130a, and reduces the probability that the size of the area to be processed 130a reduced due to heat accumulation exceeds the first ablation size and the second ablation size.

[0128] During the reciprocating motion of the light spot 11b, after the light spot 11b leaves the surface of the area to be processed 130a, the laser 11a is stopped, and the galvanometer used to adjust the emission direction of the laser 11a is reversed, and the laser 11a is emitted again, so that the motion of the light spot 11b is reversed, thus realizing the reciprocating motion of the light spot 11b.

[0129] It is understandable that during both a coarse ablation process and a fine ablation process, the spot 11b can reciprocate in a direction perpendicular to the first direction.

[0130] In some embodiments, see Figure 9 In a projection plane perpendicular to the first direction, the laser 11a controls the light spot 11b formed on the area to be processed 130a to move in a projection spiral along the first direction.

[0131] This allows the light spot 11b to continuously pass over the surface of the area to be processed 130a, which is beneficial to improving processing efficiency. It also helps to reduce the probability that the light spot 11b repeatedly passes over a part of the area to be processed 130a, and reduces the probability that the size of the area to be processed 130a reduced due to heat accumulation exceeds the first ablation size and the second ablation size.

[0132] It is understandable that the projection spiral motion of the light spot 11b is applicable to embodiments where the projection of the area to be processed 130a along the first direction is circular or elliptical.

[0133] It is understandable that the projection of spot 11b can move in a spiral motion during both a coarse ablation process and a fine ablation process.

[0134] In some embodiments, controlling the projected spiral motion of the laser spot 11b formed by the laser 11a on the region 130a to be processed specifically includes:

[0135] 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 6mm; control the scanning speed of the laser 11a to scan the area 130a to be processed to be not less than 100rad / s (radian per second).

[0136] Understandably, since the trajectory is spiral-shaped, the trajectory of spot 11b is constantly changing and gradually increases from the inside out. The current trajectory radius refers to the radius corresponding to the trajectory of spot 11b at a certain moment. The smaller the current trajectory radius, the easier it is for the heat generated by laser 11a to accumulate at the center of the trajectory.

[0137] This helps to reduce the energy accumulation at the center of the projection spiral motion trajectory, and helps to ensure that the thickness reduction at the center of the projection spiral motion trajectory after ablation meets the requirements of the first ablation size or the second ablation size.

[0138] The scanning speed of the laser 11a scanning the area 130a to be processed can be 100 rad / s, 110 rad / s, 120 rad / s, 130 rad / s, 140 rad / s, or 150 rad / s.

[0139] In some embodiments, prior to the preparation phase, 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.

[0140] The electrolyte injection port is used to inject electrolyte into the battery cell 110. Understandably, after the battery cell 110 is assembled, the electrolyte injection port is sealed to reduce the probability of electrolyte leakage from the battery cell 110.

[0141] The sealing area 110a of the injection hole refers to the physical structure that seals the injection hole.

[0142] It is understandable that in the event of an assembly quality problem in battery cell 110, the area of ​​the sealed injection hole may at least partially overlap with the area to be treated 130a.

[0143] This helps reduce the probability of damage to internal components and electrolyte leakage caused by the laser 11a directly burning through the sealing area 110a of the injection hole.

[0144] In some embodiments, the location of the region to be processed 130a is determined, see [reference]. Figure 10 and Figure 11 Specifically, it includes:

[0145] S11: Obtain a two-dimensional planar image of the surface of the bus 130 facing the emission area of ​​the laser 11a in the first direction, and determine the projection range of the welding area based on the two-dimensional planar image.

[0146] The emission region of laser 11a, namely laser emission region 11.

[0147] It is understandable that the surface morphology of the welded area is significantly different from the surface morphology of the unwelded part of the busbar 130.

[0148] S12: Obtain the three-dimensional contour image of the bus 130.

[0149] It is understandable that during the welding process between the busbar 130 and the electrode terminal 1101, the high temperature and welding quality issues cause the dimensions of the busbar 130 along the first direction to change, resulting in a significant deviation from the design dimensions. Therefore, by acquiring a three-dimensional contour image of the busbar 130, the actual dimensions of each part of the busbar 130 along the first direction can be obtained.

[0150] S13: Select at least three reference points in the portion of the three-dimensional contour image that is outside the projection range of the welding area, and form a reference plane 130b based on the position of each reference point.

[0151] Understandably, at least three reference points are not on the same straight line.

[0152] S14: Based on the 3D contour image, reference plane 130b, and preset height limit, determine the contour of the surface of the area to be processed 130a near the emission area of ​​laser 11a. Using reference plane 130b and preset height value, select contour surfaces in the 3D contour image that are not lower than the preset height limit of reference plane 130b in the first direction. The portion of this contour surface along the first direction is the area to be processed 130a.

[0153] S15: The thickness dimension is obtained based on the contour of the surface of the area to be processed 130a near the laser emission area and the contour of the surface of the electrode terminal 1101 near the laser emission area.

[0154] The dimensions of the surface of the area to be processed 130a near the emitting area of ​​the laser 11a and the surface of the electrode terminal 1101 near the emitting area of ​​the laser 11a along the first direction are the thickness dimensions.

[0155] In this way, the actual dimensions of the area to be processed 130a along the first direction after welding can be obtained, which is beneficial to improving the processing accuracy of subsequent ablation operations and to making the surface roughness of the electrode terminal 1101 obtained in the final processing lower.

[0156] In some embodiments, the first ablation size ranges from 0.04 mm (millimeters) to 0.08 mm.

[0157] This helps to ensure that the ablation of the treatment area 130a meets the requirements and improves the separation efficiency between the electrode terminal 1101 and the busbar 130.

[0158] In some embodiments, the first ablation size ranges from 0.05 mm (millimeters) to 0.07 mm.

[0159] This helps to ensure that the ablation of the treatment area 130a meets the requirements and improves the separation efficiency between the electrode terminal 1101 and the busbar 130.

[0160] The specific values ​​for the first ablation size are 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, and 0.08 mm.

[0161] The specific measurement method for measuring the first ablation size is not limited. For example, before a coarse ablation, a three-dimensional contour image of the area to be processed 130a is acquired by a three-dimensional contour measuring instrument or a three-dimensional camera. After a coarse ablation is completed, a three-dimensional contour image of the area to be processed 130a is acquired again. The difference between the highest point of the previous three-dimensional contour image and the first three-dimensional contour image in the first direction can be compared to obtain the first ablation size.

[0162] In some embodiments, the second ablation size ranges from 0.01 mm (millimeters) to 0.07 mm.

[0163] This is beneficial to ensuring that the ablation of the treatment area 130a meets the requirements, improving the separation efficiency between the electrode terminal 1101 and the busbar 130, and also beneficial to...

[0164] In some embodiments, the second ablation size ranges from 0.02 mm to 0.04 mm.

[0165] This helps to ensure that the ablation of the treatment area 130a meets the requirements and improves the separation efficiency between the electrode terminal 1101 and the busbar 130.

[0166] The specific values ​​for the second ablation dimension are 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, and 0.07mm.

[0167] The specific measurement method for measuring the second ablation size is not limited. For example, before a coarse ablation, a three-dimensional contour image of the area to be processed 130a is acquired by a three-dimensional contour measuring instrument or a three-dimensional camera. After a coarse ablation is completed, a three-dimensional contour image of the area to be processed 130a is acquired again. The difference between the highest point of the previous three-dimensional contour image and the two three-dimensional contour images in the second direction can be compared to obtain the second ablation size.

[0168] In some embodiments, the power of the laser 11a in the coarse ablation state ranges from 1600W to 2000W.

[0169] This ensures that the energy of the laser 11a is sufficient to reduce the size of the area to be treated 130a after one coarse ablation, meeting the requirements for the first ablation size and achieving the required operational efficiency.

[0170] In some embodiments, the power range of laser 11a is 1700W (up to 1900W) in the coarse ablation state.

[0171] This further facilitates the use of laser 11a to ensure that the size reduction of the area 130a to be treated after one coarse ablation meets the requirements of the first ablation size and that the operation efficiency meets the requirements.

[0172] In the coarse ablation state, the specific power values ​​of laser 11a are 1600W, 1700W, 1800W, 1900W, 2000W, etc.

[0173] In some embodiments, the scanning speed of the laser 11a scanning the area 130a to be processed ranges from 13,000 mm / s (millimeters per second) to 17,000 mm / s.

[0174] This ensures that the efficiency of the ablation process in the 130a area to be treated meets the requirements.

[0175] In some embodiments, the scanning speed of the laser 11a scanning the area 130a to be processed ranges from 14,000 mm / s to 16,000 mm / s.

[0176] This further improves the efficiency of ablation of the treatment area 130a to meet the requirements, and also helps to meet the requirements for the first ablation size.

[0177] Under coarse ablation conditions, the specific scanning speed of the laser 11a scanning the area to be processed 130a can be 13000mm / s, 14000mm / s, 15000mm / s, 16000mm / s, or 17000mm / s.

[0178] In some embodiments, the power of the laser 11a in the fine ablation state ranges from 800W to 1800W.

[0179] This allows the energy of the laser 11a to achieve the required reduction in size of the area 130a after a single fine ablation, thus meeting the requirements of the second ablation size and reducing the surface roughness after ablation.

[0180] In some embodiments, the power of the laser 11a in the fine ablation state ranges from 900W to 1700W.

[0181] This further facilitates the use of laser 11a energy to ensure that the size reduction of the region 130a after one fine ablation meets the requirements of the second ablation size.

[0182] In the state of fine ablation, the specific power value of laser 11a can be 800W, 900W, 1000W, 1100W, 1200W, 1300W, 1400W, 1500W, 1600W, 1700W, or 1800W.

[0183] In some embodiments, under fine ablation conditions, the scanning speed of the laser 11a scanning the area to be processed 130a ranges from 13000 mm / s to 17000 mm / s.

[0184] This helps reduce the probability of excessive ablation of the area to be treated 130a due to energy accumulation, and helps meet the requirements of the second ablation size.

[0185] In some embodiments, under fine ablation conditions, the scanning speed of the laser 11a scanning the area to be treated 130a ranges from 14000 mm / s to 16000 mm / s.

[0186] This further helps to reduce the probability of excessive ablation of the area to be treated 130a due to energy accumulation, and helps to meet the requirements of the second ablation size.

[0187] Under the condition of fine ablation, the specific value of the scanning speed of the laser 11a scanning the area to be processed 130a can be 13000 mm / s, 14000 mm / s, 15000 mm / s, 16000 mm / s, or 17000 mm / s.

[0188] It is understandable that the number of fine ablation cycles is determined by the residual size obtained by subtracting the product of the first ablation size and the number of coarse ablation cycles from the thickness size.

[0189] In some implementations where the second ablation size is a constant, the number of fine ablations can be obtained by dividing the residual size by the second ablation size.

[0190] In some embodiments, the thickness is 1.5 mm and the number of coarse ablation cycles is seven.

[0191] In some embodiments, the thickness is 1.2 mm and the number of coarse ablation cycles is five.

[0192] The disassembly method of the battery device 100 in a specific embodiment of this application specifically includes:

[0193] Preparation stage: Determine the position of the area to be treated 130a formed after welding the busbar 130 and electrode terminal 1101, and obtain the thickness dimension of the area to be treated 130a along the first direction; Coarse ablation stage: Determine the number of coarse ablation cycles based on the thickness dimension, and emit laser 11a towards the area to be treated 130a to perform the corresponding number of coarse ablation cycles. The size of a single coarse ablation cycle along the first direction is the first ablation size; Fine ablation stage: Determine the number of fine ablation cycles based on the thickness dimension, the number of coarse ablation cycles, and the first ablation size. Emit laser 11a towards the area to be treated 130a to complete the corresponding number of fine ablation cycles. The size of a single fine ablation cycle along the first direction is the second ablation size, which is smaller than the first ablation size. In the coarse ablation state, the power range of laser 11a is 1700W to 1900W; the scanning speed range of laser 11a scanning the area to be treated 130a is 11000mm / s to 13000mm / s. In the fine ablation state, the power of laser 11a ranges from 900W to 1700W; the scanning speed of laser 11a scanning the area to be treated 130a ranges from 14000mm / s to 16000mm / s. In the coarse ablation state, the power value of laser 11a is a first power value; in the fine ablation state, the power value of laser 11a is a second power value, and the first power value is greater than the second power value. In the coarse ablation state, the scanning speed of laser 11a scanning the area to be treated 130a is a first scanning speed; in the fine ablation state, the scanning speed of laser 11a scanning the area to be treated 130a is a second scanning speed, and the first scanning speed is less than the second scanning speed. In the fine ablation stage, the power value of laser 11a in the previous fine ablation is greater than the power value of laser 11a in the subsequent fine ablation. Before the preparation stage, the disassembly method also includes: determining that the liquid injection hole sealing area 110a of the battery cell 110 is outside the area to be treated 130a. In a projection plane perpendicular to the first direction, the laser spot 11b formed by laser 11a on the area 130a to be processed is controlled to move in a spiral motion along the first direction. Controlling the spiral motion of the laser spot 11b on the area 130a to be processed specifically includes: obtaining the current trajectory radius of the projection of the laser spot 11b along the first direction at the current position; determining that the current trajectory radius is not greater than 6 mm; and controlling the scanning speed of laser 11a on the area 130a to be processed to be not less than 100 rad / s. Before the preparation stage, the disassembly method also includes: determining that the liquid injection hole sealing area 110a of the battery cell 110 is located outside the area 130a to be processed.Determining the location of the area to be processed 130a specifically includes: acquiring a two-dimensional planar image of the surface of the bus 130 facing the laser emitting area 11 along a first direction, and determining the projection range of the area to be processed 130a based on the two-dimensional planar image; acquiring a three-dimensional contour image of the bus 130; selecting at least three reference points in the portion of the three-dimensional contour image outside the projection range of the welding area, and forming a reference plane 130b based on the position of each reference point; determining the contour of the surface of the area to be processed 130a near the laser emitting area 11 based on the three-dimensional contour image, the reference plane 130b, and a preset height limit; and obtaining the thickness dimension based on the contour of the surface of the area to be processed 130a near the laser emitting area 11 and the contour of the surface of the electrode terminal 1101 near the laser emitting area 11.

[0194] The specific number of times coarse ablation and fine ablation are performed in a specific embodiment of this application is shown in the table below.

[0195]

[0196] This application also provides a control device, including a memory and a processor. The memory stores a control program, and when the processor executes the control program, it implements the steps of the disassembly method as described in any of the foregoing embodiments.

[0197] The processor, functional modules, or functional units in any embodiment of this application may include an integration of one or more of the following: a general-purpose processor, an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a central processing unit (CPU), a graphics processing unit (GPU), an embedded neural network processing unit (NPU), a controller 200, a microcontroller 200, a microprocessor, a programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a quantum computing-based data processing logic unit, an artificial intelligence (AI) processor, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0198] This application also provides a storage medium storing a control program, which, when executed by a processor, implements the steps of the disassembly method as described in any of the foregoing embodiments.

[0199] The memory or computer-readable storage medium in any embodiment of this application may include at least one of non-volatile memory and volatile memory. Non-volatile memory includes 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. Volatile memory includes one or more of the following: Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0200] This application embodiment also provides a disassembly apparatus for a battery device 100, the disassembly apparatus being used to perform the disassembly method as described in any of the foregoing embodiments, see reference. Figures 12 to 15The dismantling device includes a laser generating device 10 and a cleaning device 20.

[0201] The cleaning equipment 20 includes a first isolation cover 21 and an airflow generating device 22. The first isolation cover 21 has a first cavity 21a. The first cavity 21a has a first air outlet 21b, a first light inlet 21c and a first light outlet 21d. The first air outlet 21b is connected to the airflow generating device 22. The airflow generating device 22 draws out the air in the first cavity 21a through the first air outlet 21b. The first light inlet 21c and the first light outlet 21d are arranged opposite to each other.

[0202] The laser 11a emitted by the laser generating device 10 passes through the first light inlet 21c and the first light outlet 21d through the first cavity 21a to irradiate the area 130a to be processed formed after the busbar 130 and the electrode terminal 1101 in the battery device 100 are welded.

[0203] It is understandable that during the process of laser 11a ablating the area to be processed 130a, in the projection plane perpendicular to the first direction, the projection of the area to be processed 130a along the first direction is located within the projection range of the first light outlet 21d.

[0204] The airflow generating device 22 is used to generate airflow so that the air in the first cavity 21a can flow out of the first cavity 21a from the first air outlet 21b.

[0205] It is understandable that during the process of laser 11a ablation of the area to be treated 130a, the weld nugget formed by welding is reheated, melted and vaporized, and the vaporized metal diffuses and recools in the first cavity 21a to form metal dust.

[0206] The disassembly device in this embodiment of the application directly extracts the air from the first cavity 21a by blocking the first isolation cover 21 and the airflow generating device 22, making it difficult for the metal dust generated during the laser 11a ablation process to diffuse outside the isolation cover. This helps to reduce the adverse effects of the diffusion of metal dust on the surrounding environment and other components in the disassembly device.

[0207] It is understood that the disassembly device in the embodiments of this application can be used to perform the disassembly method of any of the battery devices 100 in the foregoing embodiments.

[0208] The specific type of airflow generating device 22 is not limited, such as an air pump.

[0209] During the process of laser 11a ablation of the area to be treated 130a, the first isolation cover 21 is placed over the area to be treated 130a through the first light outlet 21d.

[0210] In some embodiments, see Figure 16The first cavity 21a is also provided with a first air inlet 21e, which is connected to the airflow generating device 22. The airflow generating device 22 delivers airflow into the first cavity 21a through the first air inlet 21e.

[0211] By directly supplying airflow into the first cavity 21a, the airflow can directly blow against the inner wall of the first cavity 21a and the surface of the confluence member 130, thereby reducing the probability of metal dust adhering to the confluence member 130 and the inner wall of the first cavity 21a, and making it easier for metal dust to enter the first air outlet 21b with the airflow.

[0212] In some embodiments, see Figures 16 to 18 The first air outlet 21b and the first air inlet 21e are arranged opposite to each other, which helps the airflow from the first air outlet 21b to enter the first air inlet 21e as soon as possible, which helps to reduce the decrease in airflow velocity in the first cavity 21a and improve the blowing effect of airflow on metal dust.

[0213] In some embodiments, see Figure 18 The first light inlet 21c and the first light outlet 21d are arranged along the first direction, and the first air outlet 21b is located on one side of the first cavity 21a along the second direction, and the first direction and the second direction intersect.

[0214] This helps reduce the disturbance of the airflow generated by the first air outlet 21b to the laser emission area 11, and also helps the dispersed metal dust to enter the first air outlet 21b more quickly.

[0215] In some embodiments where the first air outlet 21b and the first air inlet 21e are arranged opposite each other, referring 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.

[0216] In some embodiments, see 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 gradually increases perpendicular to the first direction.

[0217] This allows the diffused metal dust to be carried away by the airflow and drawn out from the first air outlet 21b.

[0218] In some embodiments, see Figure 18The inner wall of the first cavity 21a includes a guide slope 21aa, which 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 the side of the guide slope 21aa along the first direction. Thus, guided by the guide slope 21aa, the airflow enters the first cavity 21a from the first air inlet and quickly enters the first air outlet, improving the efficiency of discharging metal powder from the first cavity 21a.

[0219] It is understandable that during the process of laser 11a ablation of the area to be treated 130a, the first isolation cover 21 needs to be as close as possible to the area to be treated 130a, so as to facilitate the entry of metal dust into the first cavity 21a.

[0220] In some embodiments, see Figures 15 to 18 The cleaning device 20 also includes a second isolation cover 23, which is located between the laser emission area 11 of the laser generating device 10 and the first isolation cover 21. The second isolation cover 23 has a second cavity 23a, which has a second air outlet 23b, a second light inlet 23c and a second light outlet 23d. The airflow generating device 22 draws out 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.

[0221] Understandably, at least a portion of the laser beam 11a is located within the second cavity 23a.

[0222] In this way, the airflow generating device 22 can remove dust particles suspended in the air in the second cavity 23a, which helps to reduce the energy loss caused by the partial obstruction of the laser 11a by dust particles, improve the ablation accuracy of the laser 11a, and also helps to further remove diffused metal powder.

[0223] In some embodiments, see Figure 13 and Figure 15 The cleaning equipment 20 also includes an air curtain assembly 24, which is connected to the airflow generating device 22 to generate an air curtain. The air curtain flows in a direction perpendicular to the first direction, and the air curtain is located between the laser emitting area 11 and the second light inlet 23c.

[0224] In this way, on the one hand, it helps 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.

[0225] In some embodiments, the disassembly apparatus 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 along a first direction. The two-dimensional image acquisition device 30 is used to acquire a two-dimensional planar image of the surface of the busbar 130 facing the emission area of ​​the laser 11a along the first direction. The three-dimensional contour acquisition device 40 is used to acquire a three-dimensional contour image of the busbar 130.

[0226] A two-dimensional planar image of the surface of the busbar 130 facing the emission region of the laser 11a along the first direction, i.e., the busbar 130 facing away from the electrode terminal along the first direction.

[0227] Thus, the two-dimensional image acquisition device 30 can acquire the specific location of the area to be processed 130a so as to move the laser emitting area 11 to one side of the area to be processed 130a along the first direction; the three-dimensional contour acquisition device 40 can acquire the three-dimensional contour image of the bus 130 so as to obtain the contour and thickness of the surface of the area to be processed 130a near the laser emitting area 11.

[0228] The specific type of the two-dimensional image acquisition device 30 is not limited, such as a CCD (Charge Coupled Device) camera.

[0229] The specific type of the 3D contour acquisition device 40 is not limited, such as a 3D camera, a 3D contour scanner, etc.

[0230] In some embodiments, the disassembly device further includes a first driver and a first baffle 31. The first baffle 31 is driven by the driving end of the first driver to move and switch between a first position and a second position. When the first baffle 31 is in the first position, it blocks the image acquisition area of ​​the two-dimensional image acquisition device 30. This helps to reduce the probability of damage to the image acquisition area of ​​the two-dimensional image acquisition device 30 due to contact between high-temperature metal powder and the image acquisition area during laser ablation 11a. It is understood that when the first baffle 31 is in the second position, it does not block the image acquisition area of ​​the two-dimensional image acquisition device 30.

[0231] In some embodiments, the disassembly device further includes a second driver and a second baffle 41. The second baffle 41 is driven by the driving end of the second driver to move and switch between a third position and a fourth position. When the second baffle 41 is in the third position, it blocks the image acquisition area of ​​the three-dimensional contour acquisition device 40. This helps to reduce the probability of damage to the image acquisition area of ​​the three-dimensional contour acquisition device 40 due to contact between the high-temperature metal powder and the image acquisition area during the laser ablation process 11a. It is understood that when the second baffle 41 is in the fourth position, it does not block the image acquisition area of ​​the three-dimensional contour acquisition device 40.

[0232] In some embodiments, see Figure 12 and Figure 14 The disassembly device includes a three-dimensional driving device 50, which includes a first driving mechanism 51, a second driving mechanism 52, and a third driving mechanism 53. The driving ends of the second driving mechanism 52 and the third driving mechanism 53 are driven to drive the second driving mechanism 52 to move linearly along a third direction. The driving ends of the first driving mechanism 51 and the second driving mechanism 52 are driven to drive the first driving mechanism 51 to move linearly along a second direction. The two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 are both driven 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 each other.

[0233] In this way, the two-dimensional image acquisition device 30 and the three-dimensional contour acquisition device 40 can move in three-dimensional space to meet the needs of disassembly between the busbar 130 and the electrode terminal 1101 of different sizes and shapes.

[0234] The specific type of the first drive mechanism 51 is not limited, such as electric cylinder, pneumatic cylinder, linear module, etc.

[0235] The specific type of the second drive mechanism 52 is not limited, such as electric cylinder, pneumatic cylinder, linear module, etc.

[0236] The specific type of the third drive mechanism 53 is not limited, such as electric cylinder, pneumatic cylinder, linear module, etc.

[0237] Before the preparation stage, the battery device 100 to be processed is placed in the preset working area of ​​the disassembly 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 the preset detection position so that the two-dimensional image acquisition device 30 can acquire the image of the area 130a to be processed between the bus 130 and the electrode terminal 1101.

[0238] In some embodiments, the laser generating device 10 includes a galvanometer module with a lens forming a laser emission area 11.

[0239] In some embodiments, see Figure 13 and Figure 16 The disassembly device also includes a mounting base 60, on which the first isolation cover 21 and the second isolation cover 23 are both mounted to fix their positions.

[0240] In some embodiments, both the air curtain assembly 24 and the galvanometer module are mounted on the mounting base 60. This helps to maintain a stable relative position between the first isolation cover 21, the second isolation cover 23, the air curtain assembly 24, and the galvanometer module, thereby reducing the adverse effects of suspended dust and drifting metal dust in the air carried by the galvanometer module.

[0241] In some embodiments, the airflow velocity of the first air outlet 21b is not less than 15 m / s (meter per second), which helps to expel the metal dust in the first cavity 21a more quickly.

[0242] The airflow velocity at the first air outlet 21b can be 15m / s, 16m / s, 17m / s, 18m / s, 19m / s, or 20m / s.

[0243] In some embodiments, the airflow velocity at the first air inlet 21e is not less than 25 m / s (meter per second), which is beneficial for the airflow 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 back into the first cavity 21a and then be discharged from the first air inlet 21e.

[0244] The airflow velocity at the first air inlet 21e can be 25m / s, 26m / s, 27m / s, 28m / s, 29m / s, or 30m / s.

[0245] It is understandable that the airflow discharged from the first air outlet 21b enters the airflow generator 22 after being filtered, and then returns to the first cavity 21a through the airflow pipe and nozzle via the first air inlet 21e.

[0246] In some embodiments, see Figure 12 The disassembly device also includes a carrier 70, which is used to place the battery cell 110 and drive the battery device 100 to a preset working area.

[0247] In some embodiments, the disassembly device includes the control device described in the foregoing embodiments.

[0248] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0249] The above are merely preferred embodiments of this application and are not intended to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A method for disassembling a battery device, used to separate the electrode terminals of the current collector and the individual battery cells, characterized in that, The disassembly method includes: It is determined that the liquid injection hole sealing area of ​​the battery cell is located outside the area to be processed; Preparation phase: Determine the location of the area to be processed formed after welding the busbar and electrode terminals, and obtain the thickness dimension of the area to be processed along the first direction; Coarse ablation stage: The number of coarse ablations is determined according to the thickness dimension, and a laser is emitted toward the area to be treated to complete the corresponding number of coarse ablations. The size of the coarse ablation in a single coarse ablation along the first direction is the first ablation size. Fine ablation stage: The number of fine ablations is determined based on the thickness dimension, the number of coarse ablations, and the first ablation dimension. A laser is emitted toward the area to be treated to complete the corresponding number of fine ablations. The size of the ablation along the first direction in a single fine ablation is the second ablation dimension, which is smaller than the first ablation dimension. After the fine ablation stage is completed, the busbar can be separated from the electrode terminal; The acquisition of the thickness dimension of the region to be processed along the first direction specifically includes: A two-dimensional planar image of the surface of the busbar along the first direction toward the laser emission area is obtained, and the projection range of the area to be processed is determined based on the two-dimensional planar image. Obtain a three-dimensional contour image of the surface of the bus and the electrode terminal on the side near the laser emission area; In the three-dimensional contour image, at least three reference points are selected in the portion outside the projection range of the welding area, and a reference plane is formed according to the position of each of the reference points. Based on the three-dimensional contour image, the reference plane, and the preset height limit, a contour surface on the three-dimensional contour image that is not lower than the preset height limit of the reference plane in the first direction is selected. The part of the contour surface along the first direction is the area to be processed. The contour of the surface of the area to be processed is determined on the side of the laser emission area. The thickness dimension is obtained based on the contour of the surface of the area to be processed on the side closest to the laser emission area and the contour of the surface of the electrode terminal on the side closest to the laser emission area.

2. The disassembly method according to claim 1, characterized in that, In the coarse ablation state, the laser power value is a first power value, and in the fine ablation state, the laser power value is a second power value, wherein the first power value is greater than the second power value; And / or, in the coarse ablation state, the laser scanning speed of the area to be processed is a first scanning speed, and in the fine ablation state, the laser scanning speed of the area to be processed is a second scanning speed, wherein the first scanning speed is less 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 used in the previous fine ablation is greater than the power value of the laser used in the subsequent fine ablation.

4. The disassembly method according to claim 1, characterized in that, In a projection plane perpendicular to the first direction, the laser spot formed on the area to be processed is controlled to reciprocate along the projection of the laser in the first direction perpendicular to the first direction.

5. The disassembly method according to claim 1, characterized in that, In a projection plane perpendicular to the first direction, the laser spot formed on the area to be processed is controlled to move in a projection spiral along the first direction.

6. The disassembly method according to claim 5, characterized in that, Controlling the projected spiral motion of the laser spot formed on the area to be processed specifically includes: Obtain the current trajectory radius of the light spot projected along the first direction at the current position; The radius of the current trajectory is determined to be no greater than 6 mm; The scanning speed of the laser scanning of the area to be processed shall not be less than 100 rad / s.

7. The disassembly method according to claim 1, characterized in that, In the coarse ablation state, the power range of the laser is 1600W to 2000W; And / or, the scanning speed of the laser scanning of the area to be processed ranges from 10,000 mm / s to 14,000 mm / s.

8. The disassembly method according to claim 1, characterized in that, In the coarse ablation state, the laser power ranges from 1700W to 1900W; And / or, the scanning speed of the laser scanning of the area to be processed ranges from 11000 mm / s to 13000 mm / s.

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

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

11. A control device comprising a memory and a processor, the memory storing a control program, characterized in that, When the processor executes the control program, it implements the steps of the disassembly method as described in any one of claims 1-10.

12. A storage medium storing a control program, characterized in that, When the control program is executed by the processor, it implements the steps of the disassembly method as described in any one of claims 1-10.

13. A disassembly device for a battery device, characterized in that, The disassembly device is used to perform the disassembly method as described in any one of claims 1-10, the disassembly device comprising: Laser generating equipment; A cleaning device includes a first isolation cover and an airflow generating device. The first isolation cover has a first cavity. The first cavity has a first air outlet, a first light inlet and a first light outlet. The first air outlet is connected to the airflow generating device. The airflow generating device draws out the air in 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 light inlet and the first light outlet through the first cavity to irradiate the area to be processed formed after the busbar and electrode terminals are welded.

14. The disassembly device according to claim 13, characterized in that, The first cavity is also provided with a first air inlet, which is connected to the airflow generating device, and the airflow generating device delivers airflow into the first cavity through the first air inlet.

15. The disassembly device according to claim 13, characterized in that, The first light inlet and the first light outlet are arranged along a first direction, and the first air outlet is located on one side of the first cavity along a second direction, the first direction intersecting the second direction.

16. The disassembly device according to claim 13, characterized in that, The cleaning equipment also includes a second isolation cover, which is located between the laser emission area of ​​the laser generating device and the first isolation cover. The second isolation cover has a second cavity, which has a second air outlet, a second light inlet and a second light outlet. The airflow generating device draws air out of the second cavity through the second air outlet, and the laser emitted by the laser generating device passes through the second cavity through the second light inlet and the second light outlet.

17. The disassembly device according to claim 13, characterized in that, The disassembly device further includes a two-dimensional image acquisition device and a three-dimensional contour acquisition device. The laser generating device emits a 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 busbar along the first direction facing the laser emission area. The three-dimensional contour acquisition device is used to acquire a three-dimensional contour image of the busbar.

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