Welding equipment and battery manufacturing equipment

Abstract

The present application provides a welding device and a battery manufacturing equipment, belonging to the field of battery technology. The welding device of the present application includes a welding head and a welding block; the welding head is used to weld the target workpiece; and the welding block is used to position the target workpiece, the welding block includes a through hole, the through hole is used to expose the target workpiece, so that the welding head can weld the target workpiece through the through hole; wherein, the welding block also includes an air inlet for receiving a shielding gas, and an air outlet connected to the air inlet, and the air outlet is configured so that the shielding gas can be provided to the surface of the target workpiece to be welded. In this way, the welding slag or smoke particles generated by welding can be blown up and away from the welding surface, which is conducive to cleaning the welding slag or smoke particles generated by welding on the surface of the target workpiece, reducing the probability of poor welding at the target workpiece to be welded, and improving the welding quality.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Welding is an important process in the production of batteries. The quality of welding will affect the quality and stability of the battery. When the welding device welds the battery, welding slag will be generated, which will affect the welding quality. Dust removal is required during the welding process to remove the welding slag. In the related art, the dust removal effect is not good, which affects the welding quality. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a welding device and a battery manufacturing equipment to improve welding quality.

[0005] The embodiment of the first aspect of the present application provides a welding device. The welding device includes a welding head and a welding block; the welding head is used to weld a target workpiece; and the welding block is used to position the target workpiece, the welding block includes a through hole, the through hole is used to expose the target workpiece, so that the welding head can weld the target workpiece through the through hole; wherein the welding block also includes an air inlet for receiving a shielding gas, and an air outlet connected to the air inlet, and the air outlet is configured to enable the shielding gas to be provided to the surface of the target workpiece to be welded.

[0006] In the technical solution of the embodiment of the present application, the welding block is used to position the target workpiece, and the shielding gas can be provided to the surface of the target workpiece to be welded through the gas outlet. By providing the shielding gas to the surface of the target workpiece to be welded, the welding slag or smoke particles generated by welding can be blown up and away from the welding surface, which is conducive to cleaning the welding slag or smoke particles generated by welding on the target workpiece, reducing the probability of poor welding at the target workpiece to be welded, and improving the welding quality.

[0007] In some embodiments, the welding block includes a base and a top; the base is used to contact the target workpiece; the top is connected to the base, and the two surfaces of the top and the base facing each other together define an airflow channel; wherein the air inlet is arranged at the top or the base, and is connected to the airflow channel through the air inlet channel, and the opening of the airflow channel connected to the through hole forms an air outlet. The split design of the welding block and the airflow channel together define the airflow channel, which is conducive to improving the uniformity of the shielding gas, thereby facilitating dust removal and improving the welding quality.

[0008] In some embodiments, the gas outlet is a continuous annular opening along the circumference of the through hole. Thus, the annular arrangement of the gas outlet along the circumference of the through hole is conducive to improving the uniformity of the shielding gas, and is conducive to more comprehensive dust removal effect on the welding point, thereby improving the welding quality.

[0009] In some embodiments, the airflow channel is an annular cavity; and wherein the welding block further comprises a flow guide fixedly connected to one of the base or the top, the flow guide being located in the annular cavity and arranged directly opposite to the connecting opening of the air inlet channel and the annular cavity, and the flow guide being used to adjust the airflow direction of the shielding gas after it enters the annular cavity. The airflow channel is arranged as an annular cavity, and the flow guide is arranged on the welding block, which is conducive to improving the uniformity of the shielding gas, thereby being more conducive to blowing away the welding slag or smoke particles generated during the welding process, improving the dust removal effect, and improving the welding quality.

[0010] In some embodiments, the guide member includes a guide surface facing the air inlet channel, and at least one guide hole located on the guide surface and penetrating the guide member, and the guide hole is configured to allow at least part of the protective gas to enter the annular cavity through the guide hole. Due to the diversion effect of the guide member and the effect of the guide hole, the protective gas can be distributed more evenly in the air flow channel and the smoothness of the protective gas at the air outlet can be improved, thereby improving the dust removal effect.

[0011] In some embodiments, the guide is integrally formed with one of the base or the top. The guide is integrally formed with one of the base or the top, which can reduce the material cost and time cost of assembly and connection, improve production efficiency, and further reduce the number of connecting parts, which can reduce potential failures and thus improve welding reliability.

[0012] In some embodiments, the gas outlet is configured so that at least part of the shielding gas is ejected from the gas outlet and moves away from the target workpiece through the through hole after contacting the surface of the target workpiece. This is conducive to removing dust and welding slag on the surface of the target workpiece, thereby more comprehensively achieving dust removal effect on the welding point, thereby improving welding quality.

[0013] In some embodiments, the through hole includes a first hole segment and a second hole segment connected along a first direction, the second hole segment is located on a side of the first hole segment away from the target workpiece, and the first direction is parallel to the central axis of the welding head; wherein the area of ​​the cross section of the second hole segment perpendicular to the first direction is greater than or equal to the area of ​​the cross section of the first hole segment perpendicular to the first direction. The through hole is arranged in sections and the area of ​​the cross section of the second hole segment perpendicular to the first direction is greater than or equal to the area of ​​the cross section of the first hole segment perpendicular to the first direction, which is conducive to the diffusion of dust and welding slag to the surroundings, reducing the probability of them falling back to the welding point again, thereby achieving the effect of dust removal and improving welding quality.

[0014] In some embodiments, the area of ​​the cross section of the second hole segment perpendicular to the first direction gradually increases along the first direction away from the first hole segment. The area of ​​the cross section of the second hole segment perpendicular to the first direction gradually increases along the first direction, which is conducive to the diffusion of dust and welding slag to the surroundings, reducing the probability of them falling back to the welding point again, thereby achieving the effect of dust removal and improving welding quality.

[0015] In some embodiments, the welding device further includes a dust removal assembly, which includes a suction unit and an exhaust pipe connected to the suction unit, wherein the air inlet end of the exhaust pipe is connected to the through hole. The dust removal assembly is provided to facilitate cleaning of smoke and welding slag generated during welding, thereby achieving a dust removal effect and improving welding quality.

[0016] An embodiment of the second aspect of the present application provides a battery manufacturing device, which includes a welding device as described in the aforementioned embodiment.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0019] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0020] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0021] Figure 3 A schematic diagram of the structure of a welding device according to some embodiments of the present application;

[0022] Figure 4 A three-dimensional schematic diagram of a welding device according to some embodiments of the present application;

[0023] Figure 5 This is one of the simplified schematic diagrams of through holes in some embodiments of the present application;

[0024] Figure 6 This is a second simplified schematic diagram of a through hole in some embodiments of the present application;

[0025] Figure 7 A simplified schematic diagram of the shielding gas flow direction of a welding device according to some embodiments of the present application;

[0026] Figure 8 This is a schematic diagram of the simulation of the shielding gas flow direction of the welding device in some embodiments of the present application.

[0027] Description of reference numerals:

[0028] Vehicles 1000;

[0029] Battery 100, controller 200, motor 300;

[0030] Box body 10, first part 11, second part 12;

[0031] Battery cell 20, target workpiece 21, welding head 30;

[0032] Welding block 40, through hole 41, first hole section 411, second hole section 412, air inlet 42, air outlet 43, base 44, top 45, air flow channel 46, guide member 47, guide hole 471, air inlet channel 48;

[0033] Inlet pipe 50, first direction X, gas flows toward S. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", 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.

[0037] 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.

[0038] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. 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.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0041] 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.

[0042] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. 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 military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0043] Welding is an important process in the battery production process, and the quality of welding will affect the quality and stability of the battery. During the welding process, the heated metal surface will oxidize to produce molten droplets, which will form welding slag after cooling. Welding slag remaining on the welding surface will affect the surface finish and damage the appearance quality of the product; if welding slag remains in the welding structure, it is easy to cause welding degeneration, cracks and other problems, affecting the mechanical properties of the product. Improving welding quality is necessary and of great significance in the packaging of battery cell shells, internal electrode connections of batteries, and assembly of battery modules.

[0044] In some examples, the sealing nails often need to be welded to the battery shell. The battery contains electrolyte, which is the key to the normal charging and discharging of the battery. The battery sealing nails can seal the liquid filling port on the battery shell, thereby ensuring that the internal environment of the battery is isolated from the outside world to prevent electrolyte leakage. In addition, the good welding quality of the sealing nails can improve the air tightness and liquid tightness inside the battery, creating a stable environment for the chemical reaction inside the battery. Therefore, the sealing nails with good welding quality are crucial to the quality of the battery.

[0045] When welding the sealing pins, the welding slag and smoke generated by the welding may adhere to the welding point between the sealing pins and the battery shell, thereby causing the deterioration of the weld quality and may even destroy the sealing effect, thereby affecting the stability of the battery.

[0046] In order to solve the above problems, an embodiment of the present application provides a welding device and a battery manufacturing equipment. The welding device includes a welding head and a welding block; the welding head is used to weld the target workpiece; and the welding block is used to position the target workpiece, and the welding block includes a through hole, which is used to expose the target workpiece so that the welding head can weld the target workpiece through the through hole; wherein the welding block also includes an air inlet for receiving a shielding gas, and an air outlet connected to the air inlet, and the air outlet is configured so that the shielding gas can be provided to the surface of the target workpiece to be welded. The welding block is used to position the target workpiece, and the shielding gas can be provided to the surface of the target workpiece to be welded through the air outlet. By providing the shielding gas to the surface of the target workpiece to be welded, the welding slag or smoke particles generated by welding can be blown up and away from the welding surface, which is conducive to cleaning the welding slag or smoke particles generated by welding on the surface of the target workpiece, reducing the probability of poor welding at the target workpiece to be welded, and improving the welding quality.

[0047] The welding device disclosed in the embodiment of the present application can be used to weld battery cells, and can also be used to weld any other components that need to be welded. The battery cells disclosed in the embodiment of the present application can be used, but not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells, batteries, etc. disclosed in the present application can be used.

[0048] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0049] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0050] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0051] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0052] Please refer to Figure 2 , Figure 2Schematic diagram of the exploded structure of the battery provided for some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0053] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0054] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0055] The present application embodiment provides a welding device, such as Figure 3 and Figure 4 As shown, the welding device includes a welding head 30 and a welding block 40; the welding head 30 is used to weld the target workpiece 21; and the welding block 40 is used to position the target workpiece 21, the welding block 40 includes a through hole 41, the through hole 41 is used to expose the target workpiece 21, so that the welding head 30 can weld the target workpiece 21 through the through hole 41; wherein, the welding block 40 also includes an air inlet 42 for receiving a shielding gas, and an air outlet 43 connected to the air inlet 42, and the air outlet 43 is constructed so that the shielding gas can be provided to the surface of the target workpiece 21 to be welded.

[0056] Figure 3 This is a schematic diagram of the structure of a welding device in some embodiments of the present application. Figure 4 It is a three-dimensional schematic diagram of a welding device according to some embodiments of the present application, wherein the first direction X is parallel to the central axis of the welding head 30 , and the gas flow direction of the shielding gas is marked as S.

[0057] The welding device can weld any components that need to be welded, and the welding head 30 is used to weld the target workpiece 21, wherein the welding head 30 can be a laser welding head, that is, a high-energy-density laser beam is used as a heat source to quickly melt and fuse the surface of the material together. In some embodiments, the welding head 30 can also be an ultrasonic welding head, that is, the electrical energy is converted into high-frequency vibration energy through an ultrasonic generator, and then the vibration is transmitted to the ultrasonic welding head through a transducer, a horn and other devices, and when the welding head 30 contacts the weldment, the high-frequency vibration will cause friction between the molecules on the surface of the weldment, so that the material of the contact part heats up, melts and connects together.

[0058] The welding block 40 is a component that plays an auxiliary role in the welding process. During welding, the welding block 40 is mainly used to position the parts or materials to be welded so that they remain in the correct welding position. The shape and structural form of the welding block 40 can be set according to the specific welding object. In the embodiment of the present application, the welding block 40 includes a through hole 41, and the through hole 41 can be located in the central area of ​​the welding block 40 to expose the surface to be welded of the target workpiece 21 fixed by the welding block 40, and the welding head 30 can extend into the through hole 41, thereby realizing the welding of the target workpiece 21. In some embodiments, the through hole 41 can be a boss shape or a columnar shape, and the specific shape is not limited.

[0059] The gas inlet 42 is an inlet for receiving external protective gas. The gas inlet 42 can be set at any feasible position of the welding block 40 and connected to an external pipeline or an external gas supply device.

[0060] The shielding gas may be any gas that can be used as welding shielding gas, for example, including but not limited to helium, argon, nitrogen, carbon dioxide, etc.

[0061] The gas outlet 43 is a gas outlet connected to the gas inlet 42, and the gas outlet 43 can be arranged to face the surface of the target workpiece 21 to be welded, so that the shielding gas can be provided to the surface of the target workpiece 21 to be welded. The number of the gas outlet 43 can be one or more. In some embodiments, the gas outlet 43 can be an annular opening extending circumferentially around the through hole 41.

[0062] In some embodiments, the welding device can be used to perform laser welding on the battery sealing nail and the battery shell, wherein the lower surface of the welding block 40 is attached to the surface of the battery shell to position or fix the battery shell nail, and the through hole 41 of the welding block 40 exposes the liquid filling port of the battery shell so that the welding head 30 can weld the battery sealing nail to the location of the liquid filling port through the through hole 41.

[0063] In some embodiments, the welding device further includes an air inlet pipe 50, wherein the air inlet pipe 50 is connected to the air inlet port 42. The air inlet pipe 50 can be connected to an external air supply device, that is, the external air supply device can fix the air inlet pipe 50 to prevent the air inlet pipe 50 from falling under the action of gravity. In some embodiments, the number of air inlet pipes 50 can be 2-4, specifically 2, 3 or 4. The air inlet port 42 is connected to the external air supply device through the air inlet pipe 50, and the protective gas discharged from the air outlet 43 is ejected toward the surface of the battery shell and the battery sealing nail welded, so that the welding slag or smoke particles generated during the welding process can be blown up by the protective gas, and will not adhere to the welding area to affect the quality of the weld formation.

[0064] The welding block 40 is used to position the target workpiece 21, and the shielding gas can be provided to the surface of the target workpiece 21 to be welded through the gas outlet 43. By providing the shielding gas to the surface of the target workpiece 21 to be welded, the welding slag or smoke particles generated by welding can be blown away from the welding surface, which is conducive to cleaning the welding slag or smoke particles generated by welding on the target workpiece 21, reducing the probability of poor welding at the welded portion of the target workpiece 21, and improving the welding quality.

[0065] According to some embodiments of the present application, Figure 3 and Figure 4 As shown, the welding block 40 includes a base 44 and a top 45; the base 44 is used to contact the target workpiece 21; the top 45 is connected to the base 44, and the two surfaces of the top 45 and the base 44 facing each other together define an air flow channel 46; wherein the air inlet 42 is arranged on the top 45 or the base 44, and is connected to the air flow channel 46 through the air inlet channel 48, and the opening of the air flow channel 46 connected to the through hole 41 forms an air outlet 43.

[0066] The base 44 and the top 45 can be two independent parts and connected to each other to form the welding block 40. The specific connection method can be any feasible connection method, such as bolt connection, mortise and tenon connection or snap connection, which is not limited in this embodiment. In other embodiments, the base 44 and the top 45 can be the upper and lower parts of the welding block 40 formed in one piece.

[0067] The airflow channel 46 is a channel defined by two surfaces of the top 45 and the base 44 facing each other, allowing airflow to flow. The specific shape of the airflow channel 46 can be set according to specific needs, and the embodiment of the present application does not limit this. In some embodiments, the airflow channel 46 can be an annular channel or annular cavity arranged around the through hole 41.

[0068] The air inlet 42 may be disposed at the top 45 or the base 44, or at other locations, as long as it can receive and provide the protective gas to the airflow channel 46. The air inlet 42 and the airflow channel 46 may be connected via an air inlet channel 48, and the protective gas enters the air inlet channel 48 through the air inlet 42, and then enters the airflow channel 46 through the air inlet channel 48. The air outlet 43 may be located at the end of the airflow channel 46. In the embodiment of the present application, the airflow channel 46 extends to the inner wall defining the through hole 41 and is in gas communication with the through hole 41, and the air outlet 43 is an opening on the inner wall defining the through hole 41.

[0069] The welding pressing block 40 is designed in a split type and defines an air flow channel 46 together, which is beneficial to improving the uniformity of the shielding gas, thereby facilitating dust removal and further improving the welding quality.

[0070] According to some embodiments of the present application, the air outlet 43 is an annular opening continuous along the circumference of the through hole 41 .

[0071] The circumferential direction of the through hole 41 can be understood as the direction surrounding the circumference of the through hole 41. For example, the air outlet 43 is a flat opening surrounding the through hole 41. Figure 3 As shown, the through hole 41 extends in the vertical direction, and the circumference can be understood as a horizontal plane. Therefore, the annular arrangement of the gas outlet 43 along the circumference of the through hole 41 is conducive to improving the uniformity of the protective gas, and is conducive to more comprehensive dust removal effect on the welding point, thereby improving the welding quality.

[0072] According to some embodiments of the present application, Figure 3 and Figure 4 As shown, the air flow channel 46 is an annular cavity; and wherein the welding block 40 also includes a guide member 47 fixedly connected to one of the base 44 or the top 45, the guide member 47 is located in the annular cavity and is arranged opposite to the connecting port of the air inlet channel 48 and the annular cavity, and the guide member 47 is used to adjust the air flow direction of the protective gas after entering the annular cavity.

[0073] The annular cavity is a closed space or cavity structure with an annular shape. The uniformity and continuity of the protective gas can be improved by setting the gas flow channel 46 as an annular cavity. The guide member 47 is fixedly installed on one of the base 44 and the top 45. In some embodiments, the base 44 is provided with a groove, and the guide member 47 can be embedded in the groove to achieve fixation.

[0074] In some embodiments, the guide member 47 is a block structure, and the shielding gas enters the inlet channel 48 through the inlet port 42. Since the guide member 47 is arranged corresponding to the connecting port between the inlet channel 48 and the annular cavity, the shielding gas with a certain pressure will be split, that is, the gas will be divided into multiple parts and flow in different directions when encountering an obstacle, so that the shielding gas can flow more evenly in the annular cavity of the gas flow channel 46.

[0075] The air flow channel 46 is configured as an annular cavity, and the welding pressing block 40 is provided with a guide member 47, which is beneficial to improving the uniformity of the shielding gas, thereby being more conducive to blowing away the welding slag or smoke particles generated during the welding process, improving the dust removal effect, and improving the welding quality.

[0076] According to some embodiments of the present application, Figure 3-Figure 8 As shown, the guide member 47 includes a guide surface facing the air inlet channel 48 and at least one guide hole 471 located on the guide surface and penetrating the guide member 47 . The guide hole 471 is configured to allow at least part of the protective gas to enter the annular cavity through the guide hole 471 .

[0077] Figure 7 This is a simplified schematic diagram of the shielding gas flow direction of the welding device of some embodiments of the present application. Figure 7 The protective gas flow direction in is marked as gas flow direction S; Figure 8 This is a schematic diagram of a simulation of the flow direction of shielding gas in a welding device according to some embodiments of the present application. Figure 8 The line shown in is the flow direction of the shielding gas. The guide surface can be a plane or a curved surface, wherein the guide surface is arranged toward the air inlet channel 48. The guide hole 471 can be a through hole of the guide member 47, and the through direction of the guide hole 471 is the direction in which the guide member 47 is facing the air inlet channel 48. Specifically, the projection of the guide hole 471 on the plane where the guide surface is located completely falls into the projection of the air inlet channel 48 on the plane where the guide surface is located.

[0078] In some embodiments, the axial direction of the flow guide hole 471 may be perpendicular to the plane where the flow guide surface is located. In other embodiments, the axial direction of the flow guide hole 471 may also intersect with the plane where the flow guide surface is located. Exemplarily, the flow guide hole 471 may be a circular hole, a square hole, a diamond hole, etc., and its specific shape is not limited in this application.

[0079] Due to the diversion effect of the guide member 47 and the effect of the guide hole 471, the shielding gas can be distributed more evenly in the air flow channel 46 and the smoothness of the shielding gas at the air outlet 43 is improved, thereby improving the dust removal effect.

[0080] According to some embodiments of the present application, the guide member 47 is integrally formed with one of the base 44 or the top 45 .

[0081] As a manufacturing process, one-piece molding refers to the process of molding multiple parts or the entire product structure in one go through specific technical means during the manufacturing process, without subsequent assembly processes such as splicing and welding. One-piece molding is widely used in the fields of plastic products, metal products and composite materials. Taking plastic products as an example, after the plastic particles are melted at high temperature, they can be formed into plastic products with complex shapes at one time through molds.

[0082] The guide member 47 is integrally formed with the base 44 or the top 45, which can reduce the material cost and time cost of assembly and connection and improve production efficiency. In addition, the number of connecting parts is further reduced, which can reduce potential failures and thus improve welding reliability.

[0083] According to some embodiments of the present application, the gas outlet 43 is configured such that at least a portion of the protective gas is ejected from the gas outlet 43 and contacts the surface of the target workpiece 21 , and then moves through the through hole 41 in a direction away from the target workpiece 21 .

[0084] The gas outlet 43 may be arranged to be inclined toward one end of the through hole 41 located at the bottom surface of the base 44, so that the shielding gas is ejected from the gas outlet 43 in a direction that intersects with the central axis of the through hole 41, that is, ejected in an oblique downward direction toward the surface of the target workpiece 21 to be welded, and after being reflected by the target workpiece 21, moves along the extension direction of the through hole 41 to the side away from the target workpiece 21. Figure 3 As shown, the inclination angle of the emission direction of the air outlet 43 can be described as the angle α between it and the horizontal direction. For example, the value of the angle α can be 40 degrees-70 degrees, specifically 40 degrees, 50 degrees, 60 degrees or 70 degrees.

[0085] During the welding process, a large amount of smoke and dust will be generated near the welding position, and these smoke and dust will form defects such as dust pollution and welding slag at the welding point. The shielding gas ejected from the gas outlet 43 can not only prevent oxidation reaction from occurring at the welding point, but also blow away impurities such as dust and welding slag that affect the welding quality. In addition, since the shielding gas contacts the surface of the target workpiece 21 and moves away from the target workpiece 21 through the through hole 41, it will also carry dust and welding slag away from the surface of the target workpiece 21, which is conducive to dust removal.

[0086] This is helpful to remove the dust and welding slag on the surface of the target workpiece 21, so as to more comprehensively achieve the dust removal effect on the welding point, thereby improving the welding quality.

[0087] According to some embodiments of the present application, Figure 3-Figure 6As shown, the through hole 41 includes a first hole segment 411 and a second hole segment 412 connected along a first direction X, the second hole segment 412 is located on a side of the first hole segment 411 away from the target workpiece 21, and the first direction X is parallel to the central axis of the welding head 30; wherein, the area of ​​the cross section of the second hole segment 412 perpendicular to the first direction X is greater than or equal to the area of ​​the cross section of the first hole segment 411 perpendicular to the first direction X.

[0088] The first direction X may be an extending direction of the through hole 41 , or in other words, the first direction X may be parallel to the central axis of the through hole 41 . In some embodiments, the first direction X may be a vertical direction.

[0089] The second hole segment 412 is located on the side of the first hole segment 411 away from the target workpiece 21. It can be understood that in the first direction X, the target workpiece 21, the first hole segment 411 and the second hole segment 412 are arranged in sequence. Figure 5 As shown, the first hole segment 411 is cylindrical, and the second hole segment 412 is truncated cone, wherein the area of ​​the cross section M2 of the second hole segment 412 perpendicular to the first direction X is greater than or equal to the area of ​​the cross section M1 of the first hole segment 411 perpendicular to the first direction X. Figure 6 In another embodiment shown, the first hole segment 411 and the second hole segment 412 are both truncated cone-shaped, wherein the area of ​​a cross section M2 of the second hole segment 412 perpendicular to the first direction X is greater than or equal to the area of ​​a cross section M1 of the first hole segment 411 perpendicular to the first direction X. It should be understood in the above embodiments that the area of ​​any cross section M2 of the second hole segment 412 perpendicular to the first direction X is greater than or equal to the area of ​​any cross section M1 of the first hole segment 411 perpendicular to the first direction X.

[0090] The through hole 41 is arranged in sections and the area of ​​the cross section of the second hole section 412 perpendicular to the first direction X is greater than or equal to the area of ​​the cross section of the first hole section 411 perpendicular to the first direction X, which is conducive to the diffusion of dust and welding slag to the surroundings and reduces the probability of them falling back to the welding point again, thereby achieving the dust removal effect and improving the welding quality.

[0091] According to some embodiments of the present application, an area of ​​a cross section of the second hole segment 412 perpendicular to the first direction X gradually increases along the first direction X away from the first hole segment 411 .

[0092] The area of ​​the cross section of the second hole segment 412 perpendicular to the first direction X gradually increases along the first direction X. It can be understood that, in some embodiments, the second hole segment 412 is configured to be truncated cone-shaped, trumpet-shaped or step-shaped, wherein the cross section of the second hole segment 412 perpendicular to the first direction X on the side away from the target workpiece 21 is larger than the cross section of the second hole segment 412 perpendicular to the first direction X on the side away from the target workpiece 21.

[0093] The area of ​​the cross section of the second hole section 412 perpendicular to the first direction X gradually increases along the first direction X, which is conducive to the diffusion of dust and welding slag to the surroundings and reduces the probability of them falling back to the welding point again, thereby achieving the dust removal effect and improving the welding quality.

[0094] According to some embodiments of the present application, the welding device further includes a dust removal assembly, which includes a suction unit and an exhaust pipe connected to the suction unit, and an air inlet end of the exhaust pipe is connected to the through hole 41.

[0095] The dust removal assembly may include a suction unit, which sucks the smoke and slag generated during welding into the assembly through the action of a fan. In some embodiments, the dust removal assembly has a dust hood and an exhaust pipe, the dust hood is fixedly mounted on the welding block 40 to prevent the escape of smoke, and the exhaust pipe is mounted on the dust hood, and the welding smoke is collected through the exhaust pipe through the suction force of the fan and discharged to the outside or discharged after purification.

[0096] By setting up the dust removal component, it is helpful to clean the smoke and welding slag generated during the welding process, thereby achieving the dust removal effect and improving the welding quality.

[0097] An embodiment of the present application provides a battery manufacturing device, including a welding device as described in the aforementioned embodiment.

[0098] The battery manufacturing equipment in the embodiment of the present application is used to manufacture batteries. In addition to the welding device in the embodiment of the present application, it can also include a pole piece rolling device, a battery cell winding device, a battery cell packaging device, and a battery formation device. The beneficial effects of the battery manufacturing equipment in the embodiment of the present application have been described above and will not be repeated here.

[0099] like Figure 3 and Figure 4 As shown, a welding device provided by the present application includes a welding head 30 , a welding pressing block 40 and a flow guide 47 .

[0100] The welding head 30 is used to weld the target workpiece 21 (battery sealing nail); the welding block 40 is used to position the target workpiece 21, and the welding block 40 includes a through hole 41, and the through hole 41 is used to expose the target workpiece 21, so that the welding head 30 can weld the target workpiece 21 through the through hole 41; wherein, the welding block 40 also includes an air inlet 42 for receiving a shielding gas, and an air outlet 43 which is connected to the air inlet 42 and is a continuous annular opening along the circumference of the through hole 41, and the air outlet 43 is configured so that the shielding gas can be provided to the surface of the target workpiece 21 to be welded. Moreover, the air outlet 43 is configured so that at least part of the shielding gas is ejected from the air outlet 43 and moves through the through hole 41 in a direction away from the target workpiece 21 after contacting the surface of the target workpiece 21.

[0101] The through hole 41 of the welding block includes a first hole segment 411 and a second hole segment 412 which are connected and arranged along a first direction X, the second hole segment 412 is located on a side of the first hole segment 411 away from the target workpiece 21, and the first direction X is parallel to the central axis of the welding head 30; wherein the area of ​​the cross section of the second hole segment 412 perpendicular to the first direction X is greater than or equal to the area of ​​the cross section of the first hole segment 411 perpendicular to the first direction X. Moreover, the area of ​​the cross section of the second hole segment 412 perpendicular to the first direction X gradually increases in the direction away from the first hole segment 411 along the first direction X.

[0102] The welding block 40 includes a base 44 and a top 45, wherein the base 44 is used to contact the target workpiece 21, and the top 45 is connected to the base 44, and two surfaces of the top 45 and the base 44 facing each other together define an air flow channel 46; wherein the air inlet 42 is provided at the top 45 or the base 44, and is connected to the air flow channel 46 through the air inlet channel 48, and the opening of the air flow channel 46 connected to the through hole 41 forms an air outlet 43. Moreover, the air flow channel 46 is an annular cavity.

[0103] The guide member 47 is fixedly connected to one of the base 44 or the top 45. The guide member 47 is located in the annular cavity and is arranged directly opposite to the connecting port between the air inlet channel 48 and the annular cavity. The guide member 47 is used to adjust the airflow direction of the shielding gas after entering the annular cavity. In addition, the guide member 47 includes a guide surface facing the air inlet channel 48, and at least one guide hole 471 located on the guide surface and penetrating the guide member 47. The guide hole 471 is configured to allow at least part of the shielding gas to enter the annular cavity through the guide hole 471.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A welding device, characterized in that: include: A welding head, used for welding a target workpiece; as well as A welding block, used for positioning the target workpiece, the welding block comprising a through hole, the through hole being used to expose the target workpiece so that the welding head can weld the target workpiece through the through hole; The welding block further comprises a gas inlet for receiving a shielding gas, and a gas outlet communicated with the gas inlet, wherein the gas outlet is configured to enable shielding gas to be provided to a surface of the target workpiece to be welded.

2. The welding device according to claim 1, characterized in that: The welding block comprises: a base, configured to contact the target workpiece; A top portion is connected to the base portion, and two surfaces of the top portion and the base portion facing each other together define an air flow channel, Wherein, the air inlet is arranged at the top or the base, and is connected with the air flow channel through an air inlet channel, and the opening where the air flow channel is connected with the through hole forms the air outlet.

3. The welding device according to claim 2, characterized in that: The air outlet is an annular opening continuous along the circumference of the through hole.

4. The welding device according to claim 3, characterized in that: The air flow channel is an annular cavity; And wherein, the welding block further comprises: A flow guide is fixedly connected to one of the base or the top, the flow guide is located in the annular cavity and is arranged opposite to the connecting port of the air inlet channel and the annular cavity, and the flow guide is used to adjust the airflow direction of the protective gas after entering the annular cavity.

5. The welding device according to claim 4, characterized in that: The guide member includes a guide surface facing the air inlet passage, and at least one guide hole located on the guide surface and penetrating the guide member, and the guide hole is configured to allow at least part of the protective gas to enter the annular cavity through the guide hole.

6. The welding device according to claim 4, characterized in that: The guide is integrally formed with one of the base or the top.

7. The welding device according to any one of claims 1 to 6, characterized in that: The gas outlet is configured such that at least a portion of the protective gas is ejected from the gas outlet and contacts the surface of the target workpiece before moving through the through hole in a direction away from the target workpiece.

8. The welding device according to any one of claims 1 to 6, characterized in that: The through hole comprises a first hole segment and a second hole segment connected along a first direction, the second hole segment is located at a side of the first hole segment away from the target workpiece, and the first direction is parallel to the central axis of the welding head; Wherein, an area of ​​a cross section of the second hole segment perpendicular to the first direction is greater than or equal to an area of ​​a cross section of the first hole segment perpendicular to the first direction.

9. The welding device according to claim 8, characterized in that: An area of ​​a cross section of the second hole segment perpendicular to the first direction gradually increases along the first direction away from the first hole segment.

10. The welding device according to any one of claims 1 to 6, characterized in that: The welding device also includes: The dust removal assembly comprises a suction unit and an exhaust pipe connected to the suction unit, wherein the air inlet end of the exhaust pipe is communicated with the through hole.

11. A battery manufacturing device, characterized in that: Comprising the welding device according to any one of claims 1-10.

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