Battery welding device and battery welding method

Abstract

The embodiment of the present application provides a battery welding device and a battery welding method, wherein the battery welding device includes a cleaning device, a copper nozzle assembly and a lifting device. The cleaning device includes a first driving mechanism and a cleaning assembly arranged on the first driving mechanism. The cleaning assembly includes a working position and an avoidance position. The first driving mechanism drives the cleaning assembly to move along a first direction to switch between the working position and the avoidance position. The copper nozzle assembly includes a copper nozzle unit. The lifting device is drivingly connected to at least one of the copper nozzle unit and the cleaning assembly. The lifting device is configured to drive at least one of the copper nozzle unit and the cleaning assembly to rise and fall along the height direction of the battery welding device so as to clean the copper nozzle unit through the cleaning device. The height direction intersects with the first direction. The degree of automation of cleaning the copper nozzle unit can be improved, production efficiency can be improved, and labor costs can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and in particular to a battery welding device and a battery welding method. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] During the welding process, traditional battery laser welding devices usually use a fixture to clamp the battery to be welded, and the welding gun is inserted into the copper nozzle on the fixture to weld the battery to be welded. The welding slag generated during welding accumulates in the copper nozzle. The battery laser welding device in the related technology requires manual cleaning of the copper nozzle, which has the problems of low production efficiency, low degree of automation and high labor cost. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide a battery welding device and a battery welding method, which can improve the degree of automation and production efficiency and reduce labor costs.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a battery welding device, comprising:

[0006] A cleaning device, comprising a first driving mechanism and a cleaning component arranged on the first driving mechanism, wherein the cleaning component comprises a working position and an avoidance position, and the first driving mechanism drives the cleaning component to move along a first direction to switch between the working position and the avoidance position;

[0007] A copper nozzle assembly, wherein the copper nozzle assembly comprises a copper nozzle unit;

[0008] A lifting device is drivingly connected to at least one of the copper nozzle unit and the cleaning assembly; the lifting device is configured to drive at least one of the copper nozzle unit and the cleaning assembly to rise and fall along the height direction of the battery welding device, so as to clean the copper nozzle unit by the cleaning device, wherein the height direction of the battery welding device intersects with the first direction;

[0009] The cleaning assembly includes a rotating shaft, a cleaning head and a driving assembly. The rotating shaft is extended along the height direction of the battery welding device, the cleaning head is connected to the rotating shaft, and the driving assembly is configured to drive the rotating shaft to rotate, and the rotating shaft drives the cleaning head to rotate; the driving assembly includes a power source, a first bevel gear and a second bevel gear meshing with the first bevel gear, the rotating shaft of the first bevel gear is parallel to the first direction, and the rotating shaft of the second bevel gear is parallel to the height direction of the battery welding device.

[0010] The battery welding device of the embodiment of the present application, on the one hand, drives at least one of the copper nozzle unit and the cleaning component to rise and fall along the height direction of the battery welding device through the lifting device to clean the copper nozzle unit, thereby realizing full-automatic cleaning of the copper nozzle unit, improving the automation degree of cleaning the copper nozzle unit, improving production efficiency, and reducing labor costs. On the other hand, the cleaning device is provided with a first driving mechanism, and the first driving mechanism can drive the cleaning component to move along the first direction to switch between the working position and the avoidance position. That is to say, when the copper nozzle unit needs to be cleaned, the first driving mechanism drives the cleaning component to the working position, and when the copper nozzle unit does not need to be cleaned, the first driving mechanism drives the cleaning component to the avoidance position. Thus, the occupied space of the cleaning device can be reduced as much as possible to improve the influence of the cleaning component on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the automation degree of cleaning the copper nozzle unit. In addition, by setting a first bevel gear and a second bevel gear that mesh with each other, and setting the rotation axis of the first bevel gear to be parallel to the first direction, and setting the rotation axis of the second bevel gear to be parallel to the height direction of the battery welding device, the rotation center line of the torque output by the power source is parallel to the rotation axis of the first bevel gear, and perpendicular to the rotation axis of the second bevel gear and the central axis of the rotation axis, so as to realize the movement between the two staggered axes in the transmission space. In other words, the power source can be set along the first direction, the space of the cleaning device in the first direction can be fully utilized, and the space occupied in the height direction can be reduced, which makes the driving component structure simple, reliable, and low-cost, while improving the compactness of the cleaning device.

[0011] In some embodiments, the cleaning device includes a connecting member having a first end and a second end arranged opposite to each other along the first direction. The cleaning component is movably disposed at the second end of the connecting member, and the cleaning component is switched from the avoidance position to the working position by moving in a direction away from the first end of the connecting member.

[0012] In this embodiment, the cleaning component is movably disposed at the second end of the connector, and by moving in a direction away from or close to the first end of the connector, the cleaning component is extended or retracted along a first direction. While cleaning the copper nozzle, the cleaning component can also automatically retract to an avoidance position when the copper nozzle unit does not need to be cleaned, occupying less space, avoiding interference with the moving parts of the equipment body, and improving the compactness and reliability of the battery welding device.

[0013] In some embodiments, the first driving mechanism includes a cylinder disposed on the connecting member, the cylinder is drivingly connected to the cleaning component, the cleaning device includes a sliding rail and a slider that slidably cooperate, one of the sliding rail and the slider is disposed on the connecting member, and the other is disposed on the cleaning component.

[0014] In this embodiment, a sliding rail and a sliding block are provided between the cleaning component and the connecting member to achieve sliding fit, and the structure is simple and reliable.

[0015] In some embodiments, the lifting device drives the copper nozzle unit to rise and fall along the height direction of the battery welding device, so that the cleaning head can extend into or move out of the copper nozzle unit to clean the copper nozzle unit.

[0016] In this embodiment, the lifting device is controlled by the control device to drive the copper nozzle unit to rise and fall along the height direction of the battery welding device. The cleaning device does not need to move the cleaning component in the height direction, which is beneficial to simplify the structure of the cleaning device and reduce costs.

[0017] In some embodiments, the copper nozzle of the copper nozzle unit includes a welding channel, the lifting device drives the copper nozzle unit to descend along the height direction of the battery welding device, the cleaning head extends into the welding channel from the bottom of the copper nozzle, and cleans the welding channel by rotating.

[0018] In this embodiment, when the copper nozzle needs to be cleaned, the lifting device drives the copper nozzle unit to descend along the height direction of the battery welding device, and the cleaning head extends from the bottom of the copper nozzle into the welding channel and rotates to clean the welding channel. After cleaning, the lifting device drives the copper nozzle unit to rise along the height direction of the battery welding device, and the cleaning head moves out of the welding channel from the bottom of the copper nozzle.

[0019] In some embodiments, the cleaning component includes a dust collecting cover having a cleaning space, and the cleaning head is rotatably disposed in the cleaning space.

[0020] The cleaning head cleans the copper nozzle unit in the cleaning space, so that the welding slag can fall into the cleaning space faster, avoiding the welding slag from splashing outside the cleaning space during the falling process, and collecting as much welding slag as possible.

[0021] In some embodiments, the cleaning device includes a dust extraction pipe and a negative pressure device, one end of the dust extraction pipe is connected to the cleaning space, and the other end is connected to the negative pressure device.

[0022] The negative pressure generated by the negative pressure device sucks away the welding slag in the clean space, so that the clean space can continuously collect the welding slag. At the same time, the negative pressure generated by the negative pressure device helps to force the welding slag to move toward the clean space.

[0023] In some embodiments, at least a portion of the side wall of the clean space is smoothly connected to the bottom wall of the clean space via an arc-shaped guide surface.

[0024] By smoothly connecting the side wall and the bottom wall of the clean space through the arc-shaped guide surface, the generated welding slag is guided to the middle of the bottom of the clean space through the arc-shaped guide surface, that is, closer to the suction port of the dust extraction pipe. To a certain extent, the welding slag can be prevented from being deposited at the connection between the side wall and the bottom wall of the clean space, which is more conducive to the negative pressure generated by the negative pressure device to suck away the welding slag in the clean space.

[0025] In some embodiments, the copper nozzle assembly includes a second driving mechanism and a third driving mechanism disposed on the second driving mechanism, the second driving mechanism is configured to drive the copper nozzle unit to move along a second direction, and the third driving mechanism is configured to drive the copper nozzle unit to move along the first direction, wherein the height direction, the first direction and the second direction intersect.

[0026] In this embodiment, the copper nozzle assembly is provided with a second driving mechanism and a third driving mechanism. The second driving mechanism is configured to drive the copper nozzle unit to move along the second direction, and the third driving mechanism is configured to drive the copper nozzle unit to move along the first direction. In this way, the copper nozzle unit can be quickly and accurately moved to the top of the cleaning assembly.

[0027] In some embodiments, the copper nozzle assembly includes a fourth driving mechanism, which is disposed on the second driving mechanism and is configured to drive the copper nozzle unit to rise and fall along the height direction of the battery welding device, and the third driving mechanism is disposed on the second driving mechanism through the fourth driving mechanism.

[0028] In this embodiment, the copper nozzle assembly drives the copper nozzle unit and the third driving mechanism simultaneously through the fourth driving mechanism to quickly move in the height direction to the top close to the cleaning assembly. The copper nozzle unit is then driven to rise and fall in the height direction of the battery welding device through the lifting device, so that the cleaning head can extend into or move out of the copper nozzle unit to clean the copper nozzle unit. Here, both the fourth driving mechanism and the lifting device can drive the copper nozzle unit to move in the height direction. The difference is that the fourth driving mechanism has a faster moving speed, which improves the production efficiency of the battery welding device, and the lifting device has a slower moving speed, so as to finely control the distance between the copper nozzle unit and the cleaning head, thereby improving the reliability of the cleaning device.

[0029] In some embodiments, the copper nozzle unit includes a plurality of copper nozzles, and the spacing between the copper nozzles is adjustable.

[0030] By setting the spacing between the copper nozzles to be adjustable, the distance between the copper nozzles can be adjusted when changing to products of different sizes to achieve automatic compatibility with size differences between different products, thereby improving the compatibility of the battery welding device.

[0031] A second aspect of an embodiment of the present application provides a battery welding method, which is applied to a battery welding device, wherein the battery welding device includes a control device, a cleaning device, a copper nozzle assembly, and a lifting device, wherein the cleaning device includes a first driving mechanism and a cleaning assembly arranged on the first driving mechanism, wherein the cleaning assembly includes a rotating shaft, a cleaning head, and a driving assembly, wherein the rotating shaft extends along the height direction of the battery welding device, the cleaning head is connected to the rotating shaft, and the driving assembly is configured to drive the rotating shaft to rotate, and the rotating shaft drives the cleaning head to rotate; the driving assembly includes a power source, a first bevel gear, and a second bevel gear meshing with the first bevel gear, wherein the rotating shaft of the first bevel gear is parallel to the first direction, and the rotating shaft of the second bevel gear is parallel to the height direction of the battery welding device, and the battery welding method includes:

[0032] The control device controls the first driving mechanism to drive the cleaning component to switch from the avoidance position to the working position;

[0033] The control device controls the lifting device to drive at least one of the copper nozzle unit of the copper nozzle assembly and the cleaning component to rise and fall along the height direction of the battery welding device, and controls the cleaning component to clean the copper nozzle unit;

[0034] After the copper nozzle unit completes cleaning, the control device controls the first driving mechanism to drive the cleaning component to switch from the working position to the avoidance position.

[0035] In the battery welding method of the embodiment of the present application, on the one hand, the lifting device drives at least one of the copper nozzle unit and the cleaning component to lift and lower along the height direction of the battery welding device to clean the copper nozzle unit, thereby realizing full-automatic cleaning of the copper nozzle unit, improving the automation degree of cleaning the copper nozzle unit, improving production efficiency, and reducing labor costs. On the other hand, the cleaning device is provided with a first driving mechanism, and the first driving mechanism drives the cleaning component to move along the first direction to switch between the working position and the avoidance position. That is to say, when the copper nozzle unit needs to be cleaned, the first driving mechanism drives the cleaning component to the working position, and when the copper nozzle unit does not need to be cleaned, the first driving mechanism drives the cleaning component to the avoidance position. Thus, the occupied space of the cleaning device can be reduced as much as possible to improve the influence of the cleaning component on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the automation degree of cleaning the copper nozzle unit. In addition, by setting a first bevel gear and a second bevel gear that mesh with each other, and setting the rotation axis of the first bevel gear to be parallel to the first direction, and setting the rotation axis of the second bevel gear to be parallel to the height direction of the battery welding device, the rotation center line of the torque output by the power source is parallel to the rotation axis of the first bevel gear, and perpendicular to the rotation axis of the second bevel gear and the central axis of the rotation axis, so as to realize the movement between the two staggered axes in the transmission space. In other words, the power source can be set along the first direction, the space of the cleaning device in the first direction can be fully utilized, and the space occupied in the height direction can be reduced, which makes the driving component structure simple, reliable, and low-cost, while improving the compactness of the cleaning device.

[0036] In some embodiments, the copper nozzle assembly includes a second driving mechanism and a third driving mechanism disposed on the second driving mechanism. Before the control device controls the lifting device to drive at least one of the copper nozzle unit and the cleaning assembly of the copper nozzle assembly to descend along the height direction of the battery welding device, the battery welding method further includes:

[0037] The control device controls the second driving mechanism to drive the copper nozzle unit to move along the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move along the first direction, so that the copper nozzle unit moves to above the cleaning component.

[0038] The copper nozzle assembly is provided with a second driving mechanism and a third driving mechanism. The second driving mechanism is configured to drive the copper nozzle unit to move along the second direction, and the third driving mechanism is configured to drive the copper nozzle unit to move along the first direction. In this way, the copper nozzle unit can be quickly and accurately moved above the cleaning assembly.

[0039] In some embodiments, the cleaning assembly includes a dust collecting hood having a cleaning space, the cleaning head is rotatably disposed in the cleaning space, the copper nozzle unit includes a plurality of copper nozzles, the control device controls the lifting device to drive at least one of the copper nozzle unit of the copper nozzle assembly and the cleaning assembly to rise and fall along the height direction of the battery welding device, and controls the cleaning assembly to clean the copper nozzle unit, including:

[0040] The control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that one of the copper nozzles to be cleaned of the copper nozzle unit is aligned with the cleaning component;

[0041] The control device controls the lifting device to drive the copper nozzle unit to descend into the cleaning space along the height direction of the battery welding device, and controls the cleaning component to clean the copper nozzle to be cleaned;

[0042] The control device controls the lifting device to drive the cleaned copper nozzle to rise along the height direction of the battery welding device, so that the cleaned copper nozzle moves out of the cleaning space;

[0043] The control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that the next copper nozzle to be cleaned of the copper nozzle unit is aligned with the cleaning component;

[0044] The control device controls the lifting device to drive the next copper nozzle to be cleaned to descend into the cleaning space, and controls the cleaning component to clean the copper nozzle to be cleaned.

[0045] In this embodiment, the control device controls the second drive mechanism and the third drive mechanism to drive the copper nozzle unit so that one of the copper nozzles to be cleaned of the copper nozzle unit is aligned with the cleaning component, and then controls the lifting device to drive the copper nozzle unit to descend along the height direction of the battery welding device to the cleaning space, and controls the cleaning component to clean the copper nozzle to be cleaned. After completing the cleaning of the copper nozzle, the lifting device is controlled to drive the cleaned copper nozzle to rise along the height direction of the battery welding device so that the cleaned copper nozzle is moved out of the cleaning space, and this cycle is repeated until all the copper nozzles of the copper nozzle unit are cleaned.

[0046] In some embodiments, the control device controls the second driving mechanism to drive the copper nozzle unit to move in the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move in the first direction, so that the copper nozzle unit moves to above the cleaning component, including:

[0047] The control device determines a first distance and a second distance corresponding to a target copper nozzle in the copper nozzle unit based on a product model of a battery product currently being welded;

[0048] The control device controls the second driving mechanism to drive the copper nozzle unit to move the second distance along the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move the first distance along the first direction, so that the target copper nozzle is aligned with the cleaning component.

[0049] In this embodiment, since there may be deviations in the positions of the copper nozzles in the copper nozzle unit used in different models of battery products, the first distance and the second distance that are more matched with the target copper nozzle in the copper nozzle unit can be determined through the product model of the currently welded battery product, so that after the copper nozzle unit moves the second distance in the second direction and the first distance in the first direction, the target copper nozzle can be more accurately aligned with the cleaning component, thereby improving the cleaning effect of the copper nozzle.

[0050] In some implementations, the control device determines the first distance and the second distance corresponding to the target copper nozzle in the copper nozzle unit based on the product model of the battery product currently being welded, including:

[0051] The control device determines the distance between each copper nozzle in the copper nozzle unit based on the product model of the battery product currently being welded, and determines the first distance and the second distance based on the distance between each copper nozzle in the copper nozzle unit.

[0052] In this embodiment, the spacing between each copper nozzle in the copper nozzle unit can be determined by the product model of the battery product currently being welded. Since the spacing between each copper nozzle in the copper nozzle unit used by different models of battery products will affect the position of each copper nozzle, the first distance and the second distance corresponding to the target copper nozzle can be quickly and accurately determined based on the spacing between each copper nozzle in the copper nozzle unit, thereby further improving the accuracy of aligning the target copper nozzle with the cleaning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a partial structural schematic diagram of a battery welding device according to an embodiment of the present application, wherein the cleaning component is in an avoidance position;

[0054] Figure 2 It is a partial structural schematic diagram of a battery welding device according to another embodiment of the present application, wherein the cleaning component is in a working position;

[0055] Figure 3 This is a schematic diagram of the connection structure between the copper nozzle unit and the lifting device according to an embodiment of the present application;

[0056] Figure 4It is a structural schematic diagram of a cleaning device according to an embodiment of the present application, wherein the cleaning component is in an avoidance position;

[0057] Figure 5 It is a structural schematic diagram of a cleaning device according to another embodiment of the present application, wherein the cleaning component is in a working position;

[0058] Figure 6 for Figure 4 A cross-sectional view of the cleaning device shown;

[0059] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0060] Figure 8 A schematic diagram of the implementation process of a battery welding method provided in one embodiment of the present application.

[0061] Description of Reference Numerals

[0062] 1. Cleaning device; 11. Cleaning assembly; 111. Driving assembly; 1111. Power source; 1112. First bevel gear; 1113. Second bevel gear; 112. Rotating shaft; 113. Cleaning head; 114. Dust collecting cover; 114a. Cleaning space; 114b. Arc guide surface; 12. First driving mechanism; 13. Connecting piece; 14. Slide rail; 15. Sliding block; 16. Dust extraction pipe; 17. Cleaning seat; 2. Support part; 21. First Support frame; 22, second support frame; 3, copper nozzle assembly; 31, copper nozzle unit; 311, copper nozzle; 32, second driving mechanism; 321, second driving motor; 322, second transmission rack; 33, third driving mechanism; 331, third driving motor; 332, third transmission rack; 34, first connecting member; 35, second connecting member; 36, fourth driving mechanism; 361, fourth driving motor; 362, fourth transmission rack; 4, lifting device. DETAILED DESCRIPTION

[0063] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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 this application are intended to cover non-exclusive inclusions.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0069] 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 above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0070] 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.

[0071] With the development of clean energy, more and more devices use electric energy as driving energy, and then power batteries that can store more electric energy and can be charged and discharged repeatedly are developing rapidly, such as lithium-ion batteries. Among them, power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0072] With the country's vigorous promotion of new energy vehicles, new energy vehicles have ushered in a great opportunity for development. The safety and stability of automobiles have always been people's greatest concern. Therefore, improving the safety of new energy vehicles will be one of the important factors that determine whether new energy vehicles can be quickly popularized. Battery modules are the main components of the battery pack of new energy vehicles. Improving the safety of battery modules is an important way to improve the safety of new energy vehicles.

[0073] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0074] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery cell may be cylindrical, rectangular or in other shapes, etc., which is not limited in the embodiments of the present application.

[0075] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene).

[0076] The battery cell also includes an insulating film and a shell. The insulating film is coated on the outside of the electrode assembly, and the shell encapsulates the electrode assembly coated with the insulating film to form a battery cell. The insulating film can be a Mylar film, and the shell can be an aluminum shell. After the electrode assembly is wound and formed, the Mylar film and the shell are encapsulated through the Mylar wrapping process and the shelling process. Among them, the Mylar film plays the role of sealing and protecting the electrode assembly, and the Mylar film can effectively insulate the electrode assembly and the shell from each other to avoid internal short circuits in the battery cell. The shell plays a protective role.

[0077] Welding devices are used in the manufacturing process of batteries. Usually, a clamp for clamping the battery is set on the battery welding device, and the clamp has a copper nozzle that exposes the welding position of the battery. Welding slag will be generated in the process of welding the battery by the welding device. The welding slag is easy to accumulate in the copper nozzle. Long-term accumulation will cause the copper nozzle to be dirty, and then cause various poor welding phenomena, such as poor welding caused by welding slag blocking radiation. The battery laser welding device in the related art requires a manually controlled cleaning mechanism to clean the copper nozzle, which has the problems of low production efficiency, low degree of automation, and high labor cost.

[0078] In order to improve automation and production efficiency and reduce labor costs, please refer to Figures 1 to 7, an embodiment of the present application provides a battery welding device, which includes a cleaning device 1, a copper nozzle assembly 3 and a lifting device 4. The cleaning device 1 includes a first driving mechanism 12 and a cleaning assembly 11 arranged on the first driving mechanism 12. The cleaning assembly 11 includes a working position and an avoidance position. The copper nozzle assembly 3 includes a copper nozzle unit 31. The lifting device 4 is drivingly connected to at least one of the copper nozzle unit 31 and the cleaning assembly 11. The first driving mechanism 12 is configured to drive the cleaning assembly 11 to move along a first direction to switch between the working position and the avoidance position. The lifting device 4 is controlled to drive at least one of the copper nozzle unit 31 and the cleaning assembly 11 to rise and fall along the height direction of the battery welding device to clean the copper nozzle unit 31. Wherein, the height direction intersects with the first direction.

[0079] Exemplarily, the battery welding device comprises a device body, which wraps the support part 2 .

[0080] Exemplarily, the battery welding device comprises a control device.

[0081] Here, the control device is used to control the operation process of the device body, the cleaning device 1, the copper nozzle assembly 3 and the lifting device 4. The control device may include but is not limited to at least one of an industrial computer, a programmable logic controller (PLC), a host computer, etc. The host computer may be, for example, a server, a laptop, a tablet computer, a desktop computer, a smart phone, etc.

[0082] Here, the device body can realize the welding of the battery, and can be but not limited to laser welding equipment. The structure of the device body is not specifically limited in this application, and reference can be made to related welding equipment.

[0083] In actual use, the bottom of the copper nozzle assembly 3 is usually supported on the support part 2. Understandably, the support part 2 has an exposure hole exposing the bottom of the copper nozzle 311, so as to allow the cleaning assembly 11 to extend into the bottom of the copper nozzle 311 through the exposure hole to clean the copper nozzle 311.

[0084] The support part 2 may be a support member such as a support table or a support frame. Figure 1 to Figure 2 The support part 2 is in the shape of a gantry, and the gantry is surrounded to form an installation space. The copper nozzle assembly 3 is supported on the gantry, and the cleaning device 1 is located in the installation space formed by the gantry to clean the copper nozzle 311.

[0085] The lifting device 4 is drivingly connected to at least one of the copper nozzle unit 31 and the cleaning assembly 11, see Figures 1 to 3, the support part 2 can remain stationary relative to the main body of the device, and the lifting device 4 drives the cleaning device 1 to rise and fall along the height direction of the battery welding device, so that the support part 2 and the cleaning device 1 are close to each other or away from each other. The cleaning device 1 can also remain stationary relative to the main body of the device, and the lifting device 4 drives the support part 2 to rise and fall along the height direction of the battery welding device, so that the support part 2 and the cleaning device 1 are close to each other or away from each other. Of course, the lifting device 4 can also drive the support part 2 and the cleaning device 1 to rise and fall towards or away from each other at the same time, so that the support part 2 and the cleaning device 1 are close to each other or away from each other.

[0086] See also Figure 1 and Figure 4 , the first direction intersects the height direction, that is, the first direction is not parallel to the height direction. Exemplarily, the first direction and the height direction are perpendicular to each other.

[0087] In the battery welding device of the embodiment of the present application, on the one hand, the lifting device 4 drives at least one of the copper nozzle unit 31 and the cleaning component 11 to rise and fall along the height direction of the battery welding device to clean the copper nozzle unit 31, thereby realizing full-automatic cleaning of the copper nozzle unit 31, improving the automation degree of cleaning of the copper nozzle unit 31, improving production efficiency, and reducing labor costs. On the other hand, the cleaning device 1 is provided with a first driving mechanism 12, and the first driving mechanism 12 drives the cleaning component 11 to move along the first direction to switch between the working position and the avoidance position, that is, when the copper nozzle unit 31 needs to be cleaned, the first driving mechanism 12 drives the cleaning component 11 to the working position, and when the copper nozzle unit 31 does not need to be cleaned, the first driving mechanism 12 drives the cleaning component 11 to the avoidance position, thereby, the occupied space of the cleaning device 1 can be reduced as much as possible, so as to improve the influence of the cleaning component 11 on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the automation degree of cleaning of the copper nozzle unit 31.

[0088] It should be noted that the specific structure of the cleaning device 1 is not limited here.

[0089] In some embodiments, see Figures 1 to 5 The cleaning device 1 includes a connecting member 13, and the connecting member 13 has a first end and a second end arranged opposite to each other along a first direction. The cleaning component 11 is movably arranged at the second end of the connecting member 13, and is moved in a direction away from the first end of the connecting member 13 to switch the cleaning component 11 from the avoidance position to the working position.

[0090] Here, the cleaning device 1 may be connected to the support part 2, or may be connected to other parts outside the support part 2 of the equipment body. Of course, the cleaning device 1 may also have no connection with the equipment body.

[0091] Exemplarily, the cleaning device 1 includes a cleaning base body 17 , which is used to be connected to the device body, and the connecting member 13 is connected to the cleaning base body 17 .

[0092] The cleaning component 11 is movably arranged at the second end of the connecting member 13, and is switched from the avoidance position to the working position by moving in a direction away from the first end of the connecting member 13, and is switched from the working position to the avoidance position by moving in a direction close to the first end of the connecting member 13. That is to say, when the cleaning component 11 is located near the first end of the connecting member 13, the cleaning device 1 is in a retracted state and occupies a smaller space. At this time, the cleaning component 11 is in the avoidance position. When the cleaning component 11 is located away from the first end of the connecting member 13, the cleaning device 1 is in an expanded state and occupies a larger space. At this time, the cleaning component 11 is in the working position.

[0093] In this embodiment, the cleaning component 11 is movably disposed at the second end of the connecting member 13, and by moving in a direction away from or close to the first end of the connecting member 13, the cleaning component 11 is extended or retracted along the first direction. While cleaning the copper nozzle 311, the cleaning component 11 can automatically retract to an avoidance position when the copper nozzle unit 31 does not need to be cleaned, occupying less space, avoiding interference with the moving parts of the equipment body, and improving the compactness and reliability of the battery welding device.

[0094] It should be noted that the specific type of the first driving mechanism 12 is not limited here.

[0095] In some embodiments, see Figure 4 and Figure 5 The first driving mechanism 12 includes a cylinder arranged on the connecting member 13, and the cylinder is drivingly connected to the cleaning component 11. The cleaning device 1 includes a sliding rail 14 and a slider 15 that are slidably matched. One of the sliding rail 14 and the slider 15 is arranged on the connecting member 13, and the other is arranged on the cleaning component 11.

[0096] The cylinder is drivingly connected to the cleaning assembly 11 , that is, the cylinder is used to provide power for the cleaning assembly 11 to move along the first direction. Exemplarily, a piston rod of the cylinder is connected to the cleaning assembly 11 .

[0097] The cleaning device 1 comprises a slide rail 14 and a slider 15 which are slidably matched, the slider 15 is provided with a slide groove, and the slide rail 14 is arranged in the slide groove. The slide groove and the slide rail 14 both extend along a first direction.

[0098] Here, the slider 15 may be fixed, and the slide rail 14 may slide along the slide groove in the first direction. Alternatively, the slide rail 14 may be fixed, and the slider 15 may slide along the slide rail 14 in the first direction through the slide groove.

[0099] In addition, the number of the slide rails 14 is not limited herein, for example, it can be one or more. Exemplarily, the number of the slide rails 14 in the embodiment of the present application is two.

[0100] The multiple mentioned in the embodiments of the present application refers to a number of two or more.

[0101] The number of sliders 15 corresponding to each slide rail 14 may be one or more. For example, see Figure 4 and Figure 5 In the embodiment of the present application, the number of sliders 15 corresponding to each slide rail 14 is two, and the two sliders 15 are arranged at intervals along the first direction, which is beneficial to improving the reliability of the sliding fit between the slide rail 14 and the slider 15.

[0102] One of the slide rail 14 and the slider 15 is arranged on the connecting member 13, and the other is arranged on the cleaning component 11. That is to say, the slider 15 can be arranged on the connecting member 13, and the slide rail 14 is arranged on the cleaning component 11; or the slide rail 14 is arranged on the connecting member 13, and the slider 15 is arranged on the cleaning component 11.

[0103] In this embodiment, a slide rail 14 and a slider 15 are provided between the cleaning component 11 and the connecting member 13 to achieve sliding fit, and the structure is simple and reliable.

[0104] In a specific embodiment, please refer to Figure 4 and Figure 5 Two slide rails 14 are arranged on the cleaning assembly 11 at intervals along the second direction. The number of sliders 15 corresponding to each slide rail 14 is two. The two sliders 15 are arranged at intervals along the first direction, and the cylinder is arranged between the two cylinders.

[0105] Of course, in some other embodiments, the cleaning component 11 can also be moved on the connecting member 13 by a linear module. In some other embodiments, the cleaning component 11 can also be moved on the connecting member 13 by a gear and a rack.

[0106] In some embodiments, see Figures 4 to 7 The cleaning assembly 11 includes a rotating shaft 112, a cleaning head 113 and a driving assembly 111. The rotating shaft 112 is extended along the height direction of the battery welding device, the cleaning head 113 is connected to the rotating shaft 112, and the driving assembly 111 is configured to drive the rotating shaft 112 to rotate, and the rotating shaft 112 drives the cleaning head 113 to rotate.

[0107] Here, the cleaning head 113 can be a brush head, a sponge head, etc., and is not specifically limited, as long as it can clean the welding slag on the copper nozzle 311.

[0108] The cleaning head 113 may be fixed to the rotating shaft 112 via a coupling, or may be fixed to the rotating shaft 112 via an interference sleeve.

[0109] Exemplarily, the cleaning head 113 is detachably mounted on the rotating shaft 112, which is convenient for replacing and cleaning the cleaning head 113. The detachable manner may include but is not limited to being detachably mounted on the rotating shaft 112 by a snap connection or being detachably mounted on the rotating shaft 112 by a threaded connection.

[0110] In this embodiment, the control device controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning component 11 to rise and fall along the height direction of the battery welding device so that the cleaning head 113 extends into the copper nozzle 311, and controls the driving component 111 to drive the rotating shaft 112 to rotate, and the rotating shaft 112 drives the cleaning head 113 to rotate to clean the copper nozzle 311, thereby further improving the degree of automation.

[0111] In the related art, the cleaning component is driven by a synchronous belt, which has a small transmission power torque, wears quickly and is prone to slipping, resulting in low cleaning efficiency and reliability, poor cleaning effect and short service life of the cleaning device.

[0112] The cleaning device 1 of the present embodiment of the present application is shown in FIG. Figures 4 to 7 The driving assembly 111 includes a power source 1111, a cleaning driving wheel and a cleaning transmission wheel meshed with the cleaning driving wheel. The power source 1111 drives the cleaning driving wheel to rotate, and the cleaning driving wheel drives the cleaning transmission wheel to rotate. The cleaning transmission wheel is coaxially connected to the rotating shaft 112.

[0113] The power source 1111 may be, but is not limited to, a power mechanism such as an electric motor that can output torque, the cleaning driving wheel may be a driving gear, and the cleaning transmission wheel may be a transmission gear.

[0114] At this time, the torque generated by the power source 1111 is transmitted to the rotating shaft 112 through the cleaning driving wheel and the cleaning transmission wheel in sequence, so that the rotating shaft 112 can be rotated. The structure is simple and the cost is low.

[0115] In some embodiments, please refer to Figures 1 to 7 The cleaning driving wheel is the first bevel gear 1112, the cleaning transmission wheel is the second bevel gear 1113, the rotation axis of the first bevel gear 1112 is parallel to the first direction, and the rotation axis of the second bevel gear 1113 is parallel to the height direction of the battery welding device.

[0116] Here, the rotation axis of the first bevel gear 1112 is parallel to the first direction, and the rotation axis of the second bevel gear 1113 is parallel to the height direction of the battery welding device, that is, the rotation axis of the first bevel gear 1112 is perpendicular to the rotation axis of the second bevel gear 1113, and the rotation center line of the torque output by the power source 1111 is parallel to the rotation axis of the first bevel gear 1112, and perpendicular to the rotation axis of the second bevel gear 1113 and the central axis of the rotating shaft 112.

[0117] In this embodiment, by setting a first bevel gear 1112 and a second bevel gear 1113 that mesh with each other, and setting the rotation axis of the first bevel gear 1112 to be parallel to the first direction, and setting the rotation axis of the second bevel gear 1113 to be parallel to the height direction of the battery welding device, the rotation center line of the torque output by the power source 1111 is parallel to the rotation axis of the first bevel gear 1112, and perpendicular to the rotation axis of the second bevel gear 1113 and the central axis of the rotation axis 112, so as to realize the movement between the two staggered axes in the transmission space. In other words, the power source 1111 can be set along the first direction, and the space of the cleaning device 1 in the first direction can be fully utilized, and the space occupied in the height direction can be reduced, so that the driving component 111 is simple, reliable, and low in cost, while improving the compactness of the structure of the cleaning device 1.

[0118] It should be noted that the lifting device 4 is drivingly connected to at least one of the copper nozzle unit 31 and the cleaning assembly 11. The cleaning device 1 may be kept stationary relative to the main body of the device, and the lifting device 4 is drivingly connected to the copper nozzle unit 31, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other. It is also possible that the copper nozzle unit 31 is kept stationary relative to the main body of the device, and the lifting device 4 is drivingly connected to the cleaning assembly 11, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other. It is also possible that the lifting device 4 is drivingly connected to both the copper nozzle unit 31 and the cleaning assembly 11, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other.

[0119] In some embodiments, see Figures 1 to 7 The lifting device 4 drives the copper nozzle unit 31 to rise and fall along the height direction of the battery welding device, so that the cleaning head 113 can extend into or move out of the copper nozzle unit 31 to clean the copper nozzle unit 31.

[0120] In this embodiment, the lifting device 4 is controlled by the control device to drive the copper nozzle unit 31 to rise and fall along the height direction of the battery welding device. The cleaning device 1 does not need to move the cleaning component 11 in the height direction, which is beneficial to simplify the structure of the cleaning device 1 and reduce costs.

[0121] In some embodiments, the copper nozzle 311 of the copper nozzle unit 31 includes a welding channel, and the lifting device 4 drives the copper nozzle unit 31 to descend along the height direction of the battery welding device. The cleaning head 113 extends into the welding channel from the bottom of the copper nozzle 311 and cleans the welding channel by rotating.

[0122] In this embodiment, when the copper nozzle 311 needs to be cleaned, the lifting device 4 drives the copper nozzle unit 31 to descend along the height direction of the battery welding device, and the cleaning head 113 extends from the bottom of the copper nozzle 311 into the welding channel and rotates to clean the welding channel. After cleaning, the lifting device 4 drives the copper nozzle unit 31 to rise along the height direction of the battery welding device, and the cleaning head 113 moves out of the welding channel from the bottom of the copper nozzle 311.

[0123] In some implementations, the copper nozzle unit 31 includes a plurality of copper nozzles 311 , and the intervals between the copper nozzles 311 are adjustable.

[0124] By setting the spacing between the copper nozzles 311 to be adjustable, the distance between the copper nozzles 311 can be adjusted when changing to products of different sizes to achieve automatic compatibility with the size differences between different products, thereby improving the compatibility of the battery welding device. Figures 4 to 7 The cleaning assembly 11 includes a dust collecting cover 114 having a cleaning space 114a, and the cleaning head 113 is rotatably disposed in the cleaning space 114a.

[0125] The cleaning head 113 is rotatably disposed in the cleaning space 114 a , that is, the cleaning head 113 is not exposed to the cleaning space 114 a of the dust collecting cover 114 , that is, the cleaning head 113 cleans the copper nozzle unit 31 in the cleaning space 114 a .

[0126] The dust collecting cover 114 is coaxial with the rotating shaft 112 and has an opening at the top, so that the copper nozzle unit 31 extends into the cleaning space 114 a from the opening at the top, so that the cleaning head 113 can clean the copper nozzle unit 31 .

[0127] In this embodiment, by setting a dust collecting hood 114, the cleaning head 113 can be rotatably set in the cleaning space 114a. The cleaning head 113 cleans the copper nozzle unit 31 in the cleaning space 114a, so that the welding slag can fall into the cleaning space 114a more quickly, avoiding the welding slag from splashing outside the area of ​​the cleaning space 114a during the falling process, and collecting as much welding slag as possible.

[0128] In some embodiments, see Figure 4 and Figure 5 The cleaning device 1 includes a dust extraction pipe 16 and a negative pressure device. One end of the dust extraction pipe 16 is connected to the cleaning space 114a, and the other end is connected to the negative pressure device.

[0129] When cleaning the copper nozzle 311, the negative pressure device is connected to the dust extraction pipe 16, and the negative pressure generated by the negative pressure device sucks away the welding slag in the clean space 114a, so that the clean space 114a can continuously collect welding slag. At the same time, the negative pressure generated by the negative pressure device helps to move the welding slag toward the clean space 114a.

[0130] The negative pressure device is a common component in the art and will not be described in detail herein. Of course, in actual use, the negative pressure device can be activated and absorb the welding slag when cleaning the copper nozzle 311, or it can be activated and absorb the welding slag after the welding slag in the cleaning space 114a accumulates to a certain amount, which is not limited here.

[0131] In some embodiments, see Figure 7 At least part of the side wall of the cleaning space 114a is smoothly connected to the bottom wall of the cleaning space 114a through the arc-shaped guide surface 114b. In other words, there is no obvious step between the side wall and the bottom wall of the cleaning space 114a in the area where the arc-shaped guide surface 114b is provided.

[0132] Here, part of the side walls of the cleaning space 114a may be smoothly connected to the bottom wall of the cleaning space 114a via the arc-shaped guide surface 114b, or all of the side walls of the cleaning space 114a may be smoothly connected to the bottom wall of the cleaning space 114a via the arc-shaped guide surface 114b.

[0133] In this embodiment, by smoothly connecting the side wall and the bottom wall of the cleaning space 114a through the arc-shaped guide surface 114b, the generated welding slag is facilitated to be guided to the middle of the bottom of the cleaning space 114a through the arc-shaped guide surface 114b, that is, closer to the suction port of the dust extraction pipe 16. To a certain extent, the welding slag can be prevented from being deposited at the connection between the side wall and the bottom wall of the cleaning space 114a, and the negative pressure generated by the negative pressure device is more conducive to sucking away the welding slag in the cleaning space 114a.

[0134] In some embodiments, see Figure 1 and Figure 2 The copper nozzle assembly 3 includes a second driving mechanism 32 and a third driving mechanism 33 disposed on the second driving mechanism 32. The second driving mechanism 32 is configured to drive the copper nozzle unit 31 to move along the second direction, and the third driving mechanism 33 is configured to drive the copper nozzle unit 31 to move along the first direction. The height direction, the first direction and the second direction intersect.

[0135] See also Figure 1 , the first direction, the second direction and the height direction intersect, that is, the three are not parallel. Exemplarily, the first direction, the second direction and the height direction are perpendicular to each other.

[0136] For the convenience of description, in the present application, the first direction is, for example, the X-axis direction, the second direction is, for example, the Y-axis direction, and the height direction is, for example, the Z-axis direction.

[0137] It should be noted that the specific structure of the second driving mechanism 32 is not limited here. Exemplarily, the second driving mechanism 32 includes a second driving motor 321, a second driving gear and a second transmission rack 322, the second transmission rack 322 is extended along the second direction and arranged on the support part 2, the second driving motor 321 is arranged on the copper nozzle assembly 3, and by driving the second driving gear to rotate, the second driving gear is meshed with the second transmission rack 322, so as to realize the copper nozzle unit 31 to move along the second direction. Of course, the second driving mechanism 32 can also be a linear module.

[0138] It should be noted that the specific structure of the third driving mechanism 33 is not limited here. Exemplarily, the third driving mechanism 33 includes a third driving motor 331, a third driving gear and a third transmission rack 332, the third transmission rack 332 is extended along the first direction and is arranged on the support part 2, the third driving motor 331 is arranged on the copper nozzle assembly 3, and by driving the third driving gear to rotate, the third driving gear is engaged with the third transmission rack 332, so as to realize the copper nozzle unit 31 to move along the first direction. Of course, the third driving mechanism 33 can also be a linear module.

[0139] In this embodiment, the copper nozzle assembly 3 is provided with a second driving mechanism 32 and a third driving mechanism 33. The second driving mechanism 32 is configured to drive the copper nozzle unit 31 to move along the second direction, and the third driving mechanism 33 is configured to drive the copper nozzle unit 31 to move along the first direction. In this way, the copper nozzle unit 31 can be quickly and accurately moved above the cleaning assembly 11, and the position of the copper nozzle assembly 3 can be automatically adjusted to be compatible with different products.

[0140] In some embodiments, see Figure 1 and Figure 2 The copper nozzle assembly 3 includes a fourth driving mechanism 36, which is arranged on the second driving mechanism 32 and is configured to drive the copper nozzle unit 31 to rise and fall along the height direction of the battery welding device. The third driving mechanism 33 is arranged on the second driving mechanism 32 through the fourth driving mechanism 36.

[0141] It should be noted that the specific structure of the fourth drive mechanism 36 is not limited here. Exemplarily, the fourth drive mechanism 36 includes a fourth drive motor 361, a fourth driving gear and a fourth transmission rack 362, the fourth transmission rack 362 is extended along the height direction and arranged on the second drive mechanism 32, the fourth drive motor 361 is arranged on the copper nozzle assembly 3, and by driving the fourth driving gear to rotate, the fourth driving gear is engaged with the fourth transmission rack 362, so as to realize the movement of the copper nozzle unit 31 along the height direction. Of course, the fourth drive mechanism 36 can also be a linear module or a lifting cylinder.

[0142] In this embodiment, the copper nozzle assembly 3 is provided with a second driving mechanism 32 and a third driving mechanism 33. The second driving mechanism 32 can simultaneously drive the copper nozzle unit 31, the third driving mechanism 33 and the lifting device 4 to move in the second direction, and the third driving mechanism 33 can drive the copper nozzle unit 31 to move in the first direction, so that the copper nozzle unit 31 is moved to the top of the cleaning component 11, and then the fourth driving mechanism 36 is used to simultaneously drive the copper nozzle unit 31 and the third driving mechanism 33 to move quickly in the height direction to the top close to the cleaning component 11.

[0143] The copper nozzle unit 31 is then driven to rise and fall along the height direction of the battery welding device by the lifting device 4, so that the cleaning head 113 can be extended into or moved out of the copper nozzle unit 31 to clean the copper nozzle unit 31. Here, both the fourth driving mechanism 36 and the lifting device 4 can drive the copper nozzle unit 31 to move along the height direction. The difference is that the fourth driving mechanism 36 has a faster moving speed to improve the production efficiency of the battery welding device, and the lifting device 4 has a slower moving speed to finely control the distance between the copper nozzle unit 31 and the cleaning head 113, thereby improving the reliability of the cleaning device 1.

[0144] It should be noted that the specific structure of the lifting device 4 is not limited herein. Exemplarily, the lifting device 4 is, for example, a linear module or a lifting cylinder.

[0145] Exemplarily, the support portion 2 includes a first support frame 21 and a second support frame 22 spaced apart along a first direction, the copper nozzle assembly 3 includes a first connecting member 34 and a second connecting member 35 spaced apart along a second direction, the first connecting member 34 and the second connecting member 35 are movably arranged on the second driving mechanism 32 at both ends along the first direction through a fourth driving mechanism 36, the fourth driving mechanisms 36 at both ends are movably arranged on the first support frame 21 and the second support frame 22 through two second driving mechanisms 32, and the copper nozzle unit 31 is movably arranged on the first connecting member 34 and the second connecting member 35 through a third driving mechanism 33.

[0146] The present application embodiment provides a cleaning device 1, see Figures 4 to 7The cleaning device 1 is used as a component of the battery welding device of any embodiment of the present application.

[0147] On the one hand, the control device controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning component 11 to rise and fall along the height direction of the battery welding device to clean the copper nozzle unit 31, thereby realizing full-automatic cleaning of the copper nozzle unit 31, improving the automation degree of cleaning the copper nozzle unit 31, improving production efficiency, and reducing labor costs. On the other hand, the cleaning device 1 is provided with a first driving mechanism 12, and the control device can control the first driving mechanism 12 to drive the cleaning component 11 to move along the first direction to switch between the working position and the avoidance position, that is, when the copper nozzle unit 31 needs to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the working position, and when the copper nozzle unit 31 does not need to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the avoidance position, thereby, the occupied space of the cleaning device 1 can be reduced as much as possible, so as to improve the influence of the cleaning component 11 on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the automation degree of cleaning the copper nozzle unit 31.

[0148] The present application embodiment provides a battery welding method, which is applied to a battery welding device. Figures 1 to 7 As shown, the battery welding device comprises a control device, a device body, a cleaning device 1, a copper nozzle assembly 3 and a lifting device 4. The cleaning device 1 comprises a first driving mechanism 12 and a cleaning assembly 11 arranged on the first driving mechanism 12.

[0149] Figure 8 A schematic diagram of the implementation process of a battery welding method provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the battery welding method includes the following steps S801 to S803:

[0150] Step S801: the control device controls the first driving mechanism to drive the cleaning component to switch from the avoidance position to the working position.

[0151] Here, the control device is used to control the operation process of the device body, the cleaning device 1, the copper nozzle assembly 3, and the lifting device 4. The control device may include but is not limited to at least one of an industrial computer, a programmable logic controller (PLC), a host computer, etc. The host computer may be, for example, a server, a laptop, a tablet computer, a desktop computer, a smart phone, etc.

[0152] The cleaning device 1 is provided with a first driving mechanism 12, and the control device can control the first driving mechanism 12 to drive the cleaning component 11 to move along the first direction to switch between the working position and the avoidance position. That is to say, when the copper nozzle unit 31 needs to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the working position. When the copper nozzle unit 31 does not need to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the avoidance position. Thus, the occupied space of the cleaning device 1 can be reduced as much as possible to improve the influence of the cleaning component 11 on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the degree of automation of the cleaning of the copper nozzle unit 31.

[0153] Step S802, the control device controls the lifting device to drive at least one of the copper nozzle unit and the cleaning component of the copper nozzle assembly to rise and fall along the height direction of the battery welding device, and controls the cleaning component to clean the copper nozzle unit.

[0154] It should be noted that the control device controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning component 11 of the copper nozzle assembly 3 to rise and fall along the height direction of the battery welding device. The cleaning device 1 may remain stationary relative to the device body, and the lifting device 4 is driven and connected to the copper nozzle unit 31, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other. It is also possible that the copper nozzle unit 31 remains stationary relative to the device body, and the lifting device 4 is driven and connected to the cleaning component 11, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other. It is also possible that the lifting device 4 is driven and connected to the copper nozzle unit 31 and the cleaning component 11 at the same time, so that the copper nozzle unit 31 and the cleaning device 1 are close to each other or away from each other.

[0155] In some embodiments, see Figures 4 to 7 The cleaning assembly 11 includes a rotating shaft 112, a cleaning head 113 and a driving assembly 111. The rotating shaft 112 is extended along the height direction of the battery welding device, the cleaning head 113 is connected to the rotating shaft 112, and the control device is configured to control the driving assembly 111 to drive the rotating shaft 112 to rotate, and the rotating shaft 112 drives the cleaning head 113 to rotate.

[0156] Here, the cleaning head 113 can be a brush head, a sponge head, etc., and is not specifically limited, as long as it can clean the welding slag on the copper nozzle 311.

[0157] The cleaning head 113 may be fixed to the rotating shaft 112 via a coupling, or may be fixed to the rotating shaft 112 via an interference sleeve.

[0158] Exemplarily, the cleaning head 113 is detachably mounted on the rotating shaft 112, which is convenient for replacing and cleaning the cleaning head 113. The detachable manner may include but is not limited to being detachably mounted on the rotating shaft 112 by a snap connection or being detachably mounted on the rotating shaft 112 by a threaded connection.

[0159] In this embodiment, the control device controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning component 11 to rise and fall along the height direction of the battery welding device so that the cleaning head 113 extends into the copper nozzle 311, and controls the driving component 111 to drive the rotating shaft 112 to rotate, and the rotating shaft 112 drives the cleaning head 113 to rotate to clean the copper nozzle 311, thereby further improving the degree of automation.

[0160] Step S803: After the copper nozzle unit completes cleaning, the control device controls the first driving mechanism to drive the cleaning component to switch from the working position to the avoidance position.

[0161] The battery welding method of the embodiment of the present application, on the one hand, controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning component 11 to rise and fall along the height direction of the battery welding device through the control device to clean the copper nozzle unit 31, thereby realizing full-automatic cleaning of the copper nozzle unit 31, improving the automation degree of cleaning of the copper nozzle unit 31, improving production efficiency, and reducing labor costs. On the other hand, the cleaning device 1 is provided with a first driving mechanism 12, and the control device can control the first driving mechanism 12 to drive the cleaning component 11 to move along the first direction to switch between the working position and the avoidance position, that is, when the copper nozzle unit 31 needs to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the working position, and when the copper nozzle unit 31 does not need to be cleaned, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to the avoidance position, thereby, the occupied space of the cleaning device 1 can be reduced as much as possible, so as to improve the influence of the cleaning component 11 on the movement of the battery welding device during the welding process, thereby improving the compactness and reliability of the battery welding device, and further improving the automation degree of cleaning the copper nozzle unit 31.

[0162] In some embodiments, see Figures 1 to 7 The copper nozzle assembly 3 includes a second driving mechanism 32 and a third driving mechanism 33 disposed on the second driving mechanism 32. Before the control device controls the lifting device 4 to drive at least one of the copper nozzle unit 31 and the cleaning assembly 11 of the copper nozzle assembly 3 to descend along the height direction of the battery welding device, the battery welding method further includes:

[0163] The control device controls the second driving mechanism 32 to drive the copper nozzle unit 31 to move along the second direction, and controls the third driving mechanism 33 to drive the copper nozzle unit 31 to move along the first direction, so that the copper nozzle unit 31 moves to above the cleaning component 11.

[0164] Exemplarily, the copper nozzle assembly 3 includes a fourth driving mechanism 36, and the fourth driving mechanism 36 is controlled to drive the copper nozzle unit 31 to move in the height direction.

[0165] Here, the specific structure of the second driving mechanism 32 is not limited. Exemplarily, the second driving mechanism 32 includes a second driving motor 321, a second driving gear and a second transmission rack 322, the second transmission rack 322 is extended along the second direction and arranged on the support part 2, the second driving motor 321 is arranged on the copper nozzle assembly 3, and by driving the second driving gear to rotate, the second driving gear is engaged with the second transmission rack 322, so as to realize the copper nozzle unit 31 to move along the second direction. Of course, the second driving mechanism 32 can also be a linear module.

[0166] Here, the specific structure of the third driving mechanism 33 is not limited. Exemplarily, the third driving mechanism 33 includes a third driving motor 331, a third driving gear and a third transmission rack 332, the third transmission rack 332 is extended along the first direction and arranged on the support part 2, the third driving motor 331 is arranged on the copper nozzle assembly 3, and by driving the third driving gear to rotate, the third driving gear is meshed with the third transmission rack 332, so as to realize the copper nozzle unit 31 to move along the first direction. Of course, the third driving mechanism 33 can also be a linear module.

[0167] In this embodiment, the copper nozzle assembly 3 is provided with a second driving mechanism 32 and a third driving mechanism 33. The second driving mechanism 32 is configured to drive the copper nozzle unit 31 to move along the second direction, and the third driving mechanism 33 is configured to drive the copper nozzle unit 31 to move along the first direction. In this way, the copper nozzle unit 31 can be quickly and accurately moved to the top of the cleaning assembly 11.

[0168] In some embodiments, the control device controls the second driving mechanism 32 to drive the copper nozzle unit 31 to move along the second direction, and controls the third driving mechanism 33 to drive the copper nozzle unit 31 to move along the first direction, so that the copper nozzle unit 31 moves to the top of the cleaning component 11, which may include:

[0169] The control device determines a first distance and a second distance corresponding to a target copper nozzle in the copper nozzle unit based on a product model of a battery product currently being welded;

[0170] The control device controls the second driving mechanism to drive the copper nozzle unit to move a second distance along a second direction, and controls the third driving mechanism to drive the copper nozzle unit to move a first distance along a first direction, so that the target copper nozzle is aligned with the cleaning component.

[0171] It can be understood that the target copper nozzle is the copper nozzle currently to be cleaned in the copper nozzle unit.

[0172] Here, the control device may determine the first distance and the second distance corresponding to each copper nozzle in the copper nozzle unit based on the product model of the battery product in any appropriate manner, and the embodiment of the present application is not limited to this.

[0173] In some embodiments, an association relationship between the product model of at least one battery product and the first distance and the second distance corresponding to each copper nozzle in the copper nozzle unit can be preset; based on the product model of the currently welded battery product, the first distance and the second distance corresponding to the target copper nozzle can be obtained by searching the association relationship. For example, an association relationship between the product model of at least one battery product and the first distance and the second distance corresponding to each copper nozzle in the copper nozzle unit can be set in the blueprint information of the current product model, and the first distance and the second distance corresponding to the target copper nozzle can be obtained by querying the blueprint information of the current product model.

[0174] In this embodiment, since there may be deviations in the positions of the copper nozzles in the copper nozzle unit used in different models of battery products, the first distance and the second distance that are more matched with the target copper nozzle in the copper nozzle unit can be determined through the product model of the currently welded battery product, so that after the copper nozzle unit moves the second distance in the second direction and the first distance in the first direction, the target copper nozzle can be more accurately aligned with the cleaning component, thereby improving the cleaning effect of the copper nozzle.

[0175] In some embodiments, the control device determines the first distance and the second distance corresponding to the target copper nozzle in the copper nozzle unit based on the product model of the battery product currently being welded, including:

[0176] The control device determines the spacing between the copper nozzles in the copper nozzle unit based on the product model of the battery product currently being welded, and determines the first distance and the second distance based on the spacing between the copper nozzles in the copper nozzle unit.

[0177] In some embodiments, an association relationship between the product model of at least one battery product and the spacing between the copper nozzles in the copper nozzle unit can be pre-set; based on the product model of the battery product currently being welded, the spacing between the copper nozzles in the copper nozzle unit can be obtained by searching the association relationship, and the initial position of each copper nozzle in the copper nozzle unit can be determined according to the spacing, and then according to the initial position of the target copper nozzle in the copper nozzle unit and the position of the cleaning component, the first distance and second distance that can enable the target copper nozzle to move to the top of the cleaning component and align with the cleaning component can be determined, that is, the first distance and second distance corresponding to the target copper nozzle.

[0178] In this embodiment, the spacing between each copper nozzle in the copper nozzle unit can be determined by the product model of the battery product currently being welded. Since the spacing between each copper nozzle in the copper nozzle unit used by different models of battery products will affect the position of each copper nozzle, the first distance and the second distance corresponding to the target copper nozzle can be quickly and accurately determined based on the spacing between each copper nozzle in the copper nozzle unit, thereby further improving the accuracy of aligning the target copper nozzle with the cleaning component.

[0179] In some embodiments, see Figures 1 to 7 The cleaning assembly 11 includes a dust collecting cover 114 having a cleaning space 114 a , the cleaning head 113 is rotatably disposed in the cleaning space 114 a , and the copper nozzle unit 31 includes a plurality of copper nozzles 311 .

[0180] The above step S802 may include the following steps S821 to S825:

[0181] Step S821, the control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that one of the copper nozzles to be cleaned of the copper nozzle unit is aligned with the cleaning component;

[0182] Step S822, the control device controls the lifting device to drive the copper nozzle unit to descend along the height direction of the battery welding device into the cleaning space, and controls the cleaning component to clean the copper nozzle to be cleaned;

[0183] Step S823, the control device controls the lifting device to drive the cleaned copper nozzle to rise along the height direction of the battery welding device, so that the cleaned copper nozzle moves out of the cleaning space;

[0184] Step S824: The control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that the next copper nozzle to be cleaned of the copper nozzle unit is aligned with the cleaning component.

[0185] Step S825, the control device controls the lifting device to drive the next copper nozzle to be cleaned to descend into the cleaning space, and controls the cleaning component to clean the copper nozzle to be cleaned.

[0186] Here, the number of the copper nozzles 311 is not limited, for example, there may be two or more.

[0187] The cleaning head 113 is rotatably disposed in the cleaning space 114 a , that is, the cleaning head 113 is not exposed to the cleaning space 114 a of the dust collecting cover 114 , that is, the cleaning head 113 cleans the copper nozzle unit 31 in the cleaning space 114 a .

[0188] The dust collecting cover 114 is coaxial with the rotating shaft 112 and has an opening at the top, so that the copper nozzle unit 31 extends into the cleaning space 114 a from the opening at the top, so that the cleaning head 113 can clean the copper nozzle unit 31 .

[0189] In this embodiment, by setting a dust collecting hood 114, the cleaning head 113 can be rotatably set in the cleaning space 114a. The cleaning head 113 cleans the copper nozzle unit 31 in the cleaning space 114a, so that the welding slag can fall into the cleaning space 114a more quickly, avoiding the welding slag from splashing outside the area of ​​the cleaning space 114a during the falling process, and collecting as much welding slag as possible.

[0190] In some embodiments, see Figures 4 to 7 The cleaning device 1 includes a dust extraction pipe 16 and a negative pressure device. One end of the dust extraction pipe 16 is connected to the cleaning space 114a, and the other end is connected to the negative pressure device.

[0191] When cleaning the copper nozzle 311, the negative pressure device is connected to the dust extraction pipe 16, and the negative pressure generated by the negative pressure device sucks away the welding slag in the clean space 114a, so that the clean space 114a can continuously collect welding slag. At the same time, the negative pressure generated by the negative pressure device helps to move the welding slag toward the clean space 114a.

[0192] The negative pressure device is a common component in the art and will not be described in detail herein. Of course, in actual use, the negative pressure device can be activated and absorb the welding slag when cleaning the copper nozzle 311, or it can be activated and absorb the welding slag after the welding slag in the cleaning space 114a accumulates to a certain amount, which is not limited here.

[0193] In some embodiments, see Figure 7 At least part of the side wall of the cleaning space 114a is smoothly connected to the bottom wall of the cleaning space 114a through the arc-shaped guide surface 114b. In other words, there is no obvious step between the side wall and the bottom wall of the cleaning space 114a in the area where the arc-shaped guide surface 114b is provided.

[0194] Here, part of the side walls of the cleaning space 114a may be smoothly connected to the bottom wall of the cleaning space 114a via the arc-shaped guide surface 114b, or all of the side walls of the cleaning space 114a may be smoothly connected to the bottom wall of the cleaning space 114a via the arc-shaped guide surface 114b.

[0195] By smoothly connecting the side wall and the bottom wall of the cleaning space 114a through the arc-shaped guide surface 114b, the generated welding slag is guided to the middle of the bottom of the cleaning space 114a through the arc-shaped guide surface 114b, that is, closer to the suction port of the dust extraction pipe 16. To a certain extent, the welding slag can be prevented from being deposited at the connection between the side wall and the bottom wall of the cleaning space 114a, which is more conducive to the negative pressure generated by the negative pressure device to suck away the welding slag in the cleaning space 114a.

[0196] In this embodiment, the control device controls the second drive mechanism 32 and the third drive mechanism 33 to drive the copper nozzle unit 31 so that one of the copper nozzles 311 to be cleaned of the copper nozzle unit 31 is aligned with the cleaning component 11, and then controls the lifting device 4 to drive the copper nozzle unit 31 to descend along the height direction of the battery welding device to the cleaning space 114a, and controls the cleaning component 11 to clean the copper nozzle 311 to be cleaned. After completing the cleaning of the copper nozzle 311, the lifting device 4 is controlled to drive the cleaned copper nozzle 311 to rise along the height direction of the battery welding device so that the cleaned copper nozzle 311 moves out of the cleaning space, and this cycle is repeated until all the copper nozzles 311 of the copper nozzle unit 31 are cleaned.

[0197] The following is an implementation process of a battery welding method provided in an embodiment of the present application. The battery welding method includes the following steps S801 to S806:

[0198] Step S801 , the control device controls the second driving mechanism 32 to drive the copper nozzle unit 31 to move along the second direction, and controls the third driving mechanism 33 to drive the copper nozzle unit 31 to move along the first direction, so that the copper nozzle unit 31 moves to above the cleaning component 11 .

[0199] Step S802, the control device controls the first driving mechanism 12 to drive the cleaning component 11 to switch from the avoidance position to the working position, and at the same time the driving component 111 drives the rotating shaft 112 to rotate, the rotating shaft 112 drives the cleaning head 113 to rotate, and the dust removal function of the negative pressure device is started.

[0200] Step S803 , the control device controls the lifting device 4 to drive one of the copper nozzles 311 in the copper nozzle unit 31 to descend along the height direction of the battery welding device into the cleaning space 114 a , and controls the cleaning component 11 to clean the copper nozzle 311 .

[0201] Step S804: the control device controls the lifting device 4 to drive the cleaned copper nozzle 311 to rise along the height direction of the battery welding device, so that the cleaned copper nozzle 311 moves out of the cleaning space 114a.

[0202] Step S805 , the control device controls the lifting device 4 to drive the next copper nozzle 311 to descend into the cleaning space 114 a , and controls the cleaning component 11 to clean the copper nozzle 311 .

[0203] Step S806: After the nozzle unit 31 completes cleaning, the control device controls the first driving mechanism 12 to drive the cleaning assembly 11 to switch from the working position to the avoidance position.

[0204] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0205] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A battery welding device, characterized in that: include: A device body, the device body comprising a support portion; A cleaning device, the cleaning device is arranged on the supporting part, the cleaning device comprises a first driving mechanism and a cleaning component arranged on the first driving mechanism, the cleaning component comprises a working position and an avoidance position, the first driving mechanism drives the cleaning component to move along a first direction to switch between the working position and the avoidance position; A copper nozzle assembly, the copper nozzle assembly comprising a copper nozzle unit, and the copper nozzle assembly is supported by the supporting portion; A lifting device, drivingly connected to the copper nozzle unit, the lifting device is configured to drive the copper nozzle unit to rise and fall along the height direction of the battery welding device, so that a part of the structure of the cleaning assembly can extend into or move out of the copper nozzle unit to clean the copper nozzle unit, wherein the height direction of the battery welding device intersects with the first direction; The cleaning assembly includes a rotating shaft, a cleaning head, and a driving assembly, wherein the rotating shaft is extended along the height direction of the battery welding device, the cleaning head is connected to the rotating shaft, and the driving assembly is configured to drive the rotating shaft to rotate, and the rotating shaft drives the cleaning head to rotate; the driving assembly includes a power source, a first bevel gear, and a second bevel gear meshing with the first bevel gear, the rotating shaft of the first bevel gear is parallel to the first direction, and the rotating shaft of the second bevel gear is parallel to the height direction of the battery welding device; The cleaning device is in the working position, the cleaning device is in an unfolded state, and is used to clean the copper nozzle unit; the cleaning device is in the avoidance position, the cleaning device is in a retracted state, and is used to avoid the movement of the moving parts of the battery welding device during the welding process; The cleaning device comprises a connecting member, wherein the connecting member has a first end and a second end arranged opposite to each other along the first direction, the first end of the connecting member is connected to the supporting portion, the cleaning component is movably arranged at the second end of the connecting member, and the cleaning component is switched from the avoidance position to the working position by moving in a direction away from the first end of the connecting member, and is switched from the working position to the avoidance position by moving in a direction close to the first end of the connecting member; The copper nozzle of the copper nozzle unit includes a welding channel, the lifting device drives the copper nozzle unit to descend along the height direction of the battery welding device, the cleaning head extends into the welding channel from the bottom of the copper nozzle, and cleans the welding channel by rotating; The first driving mechanism comprises a cylinder disposed on the connecting member, the cylinder extending along the first direction, the cylinder comprising a piston rod, and the piston rod is drivingly connected to the cleaning component.

2. The battery welding device according to claim 1, characterized in that: The cleaning device comprises a slide rail and a slider which are slidably matched, one of the slide rail and the slider is arranged on the connecting member, and the other is arranged on the cleaning component.

3. The battery welding device according to claim 1, characterized in that: The cleaning component comprises a dust collecting cover having a cleaning space, and the cleaning head is rotatably arranged in the cleaning space.

4. The battery welding device according to claim 3, characterized in that: The cleaning device comprises a dust extraction pipe and a negative pressure device. One end of the dust extraction pipe is communicated with the cleaning space, and the other end is connected to the negative pressure device.

5. The battery welding device according to claim 3, characterized in that: At least a portion of the side wall of the cleaning space is smoothly connected to the bottom wall of the cleaning space via an arc-shaped guide surface.

6. The battery welding device according to any one of claims 1 to 5, characterized in that: The copper nozzle assembly includes a second driving mechanism and a third driving mechanism arranged on the second driving mechanism, the second driving mechanism is configured to drive the copper nozzle unit to move along the second direction, and the third driving mechanism is configured to drive the copper nozzle unit to move along the first direction, wherein the height direction, the first direction and the second direction intersect.

7. The battery welding device according to claim 6, characterized in that: The copper nozzle assembly includes a fourth driving mechanism, which is arranged on the second driving mechanism and configured to drive the copper nozzle unit to rise and fall along the height direction of the battery welding device. The third driving mechanism is arranged on the second driving mechanism through the fourth driving mechanism.

8. The battery welding device according to any one of claims 1 to 5, characterized in that: The copper nozzle unit comprises a plurality of copper nozzles, and the distance between the copper nozzles is adjustable.

9. A battery welding method, characterized in that: Applied to a battery welding device, the battery welding device includes a control device, a device body, a cleaning device, a copper nozzle assembly and a lifting device, the cleaning device includes a first driving mechanism and a cleaning assembly arranged on the first driving mechanism, the cleaning device also includes a connecting piece, the cleaning assembly includes a working position and an avoidance position, the copper nozzle assembly includes a copper nozzle unit, the lifting device is configured to drive the copper nozzle unit to rise and fall along the height direction of the battery welding device so that a partial structure of the cleaning assembly can extend into or move out of the copper nozzle unit; the copper nozzle of the copper nozzle unit includes a welding channel, the device body includes a supporting portion; the cleaning device is arranged on the supporting portion; the copper nozzle assembly is supported on the supporting portion; the first driving mechanism drives the cleaning assembly to move along a first direction so as to move in the height direction of the battery welding device. The battery welding device is switched between the working position and the avoidance position; the cleaning assembly includes a rotating shaft, a cleaning head and a driving assembly, the rotating shaft extends along the height direction of the battery welding device, the cleaning head is connected to the rotating shaft, and the driving assembly is configured to drive the rotating shaft to rotate, and the rotating shaft drives the cleaning head to rotate; the driving assembly includes a power source, a first bevel gear and a second bevel gear meshing with the first bevel gear, the rotating shaft of the first bevel gear is parallel to the first direction, the rotating shaft of the second bevel gear is parallel to the height direction of the battery welding device, the first driving mechanism includes a cylinder provided on the connecting member, the cylinder extends along the first direction, the cylinder includes a piston rod, and the piston rod is drivingly connected to the cleaning assembly, and the battery welding method includes: The control device controls the first driving mechanism to drive the cleaning component to switch from the avoidance position to the working position; the cleaning device is in the working position, the cleaning device is in an unfolded state, and is used to clean the copper nozzle unit; the cleaning device is in the avoidance position, the cleaning device is in a retracted state, and is used to avoid the movement of the moving parts of the battery welding device during the welding process; the connecting member has a first end and a second end arranged opposite to each other along the first direction, the first end of the connecting member is connected to the supporting part, the cleaning component is movably arranged at the second end of the connecting member, and the cleaning component is switched from the avoidance position to the working position by moving in a direction away from the first end of the connecting member, and is switched from the working position to the avoidance position by moving in a direction close to the first end of the connecting member; The control device controls the lifting device to drive the copper nozzle unit of the copper nozzle assembly to rise and fall along the height direction of the battery welding device, so that the cleaning head extends from the bottom of the copper nozzle into the welding channel, and cleans the welding channel by rotating, and controls the cleaning assembly to clean the copper nozzle unit; After the copper nozzle unit completes cleaning, the control device controls the first driving mechanism to drive the cleaning component to switch from the working position to the avoidance position.

10. The battery welding method according to claim 9, characterized in that: The copper nozzle assembly includes a second driving mechanism and a third driving mechanism arranged on the second driving mechanism. Before the control device controls the lifting device to drive at least one of the copper nozzle unit of the copper nozzle assembly and the cleaning assembly to descend along the height direction of the battery welding device, the battery welding method further includes: The control device controls the second driving mechanism to drive the copper nozzle unit to move along the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move along the first direction, so that the copper nozzle unit moves to above the cleaning component.

11. The battery welding method according to claim 10, characterized in that: The cleaning assembly includes a dust collecting cover having a cleaning space, the cleaning head is rotatably disposed in the cleaning space, the copper nozzle unit includes a plurality of copper nozzles, the control device controls the lifting device to drive at least one of the copper nozzle unit of the copper nozzle assembly and the cleaning assembly to rise and fall along the height direction of the battery welding device, and controls the cleaning assembly to clean the copper nozzle unit, including: The control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that one of the copper nozzles to be cleaned of the copper nozzle unit is aligned with the cleaning component; The control device controls the lifting device to drive the copper nozzle unit to descend into the cleaning space along the height direction of the battery welding device, and controls the cleaning component to clean the copper nozzle to be cleaned; The control device controls the lifting device to drive the cleaned copper nozzle to rise along the height direction of the battery welding device, so that the cleaned copper nozzle moves out of the cleaning space; The control device controls the second driving mechanism and the third driving mechanism to drive the copper nozzle unit so that the next copper nozzle to be cleaned of the copper nozzle unit is aligned with the cleaning component; The control device controls the lifting device to drive the next copper nozzle to be cleaned to descend into the cleaning space, and controls the cleaning component to clean the copper nozzle to be cleaned.

12. The battery welding method according to claim 10 or 11, characterized in that: The control device controls the second driving mechanism to drive the copper nozzle unit to move along the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move along the first direction, so that the copper nozzle unit moves to above the cleaning component, including: The control device determines a first distance and a second distance corresponding to a target copper nozzle in the copper nozzle unit based on a product model of a battery product currently being welded; The control device controls the second driving mechanism to drive the copper nozzle unit to move the second distance along the second direction, and controls the third driving mechanism to drive the copper nozzle unit to move the first distance along the first direction, so that the target copper nozzle is aligned with the cleaning component.

13. The battery welding method according to claim 12, characterized in that: The control device determines a first distance and a second distance corresponding to a target copper nozzle in the copper nozzle unit based on the product model of the currently welded battery product, including: The control device determines the distance between each copper nozzle in the copper nozzle unit based on the product model of the battery product currently being welded, and determines the first distance and the second distance based on the distance between each copper nozzle in the copper nozzle unit.

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