A welding pressure plate for a battery current collector

Abstract

This application discloses a welding plate for a battery current collector, including a first cover plate and a second cover plate. The first cover plate has a positioning part adapted to the current collector, and a first welding port is provided on the surface of the first cover plate. The second cover plate has a second welding port adapted to the first welding port on its surface. The second cover plate has a receiving cavity for accommodating the positioning part, and an air inlet communicating with the receiving cavity is provided on the side wall of the second cover plate. The positioning part has a first channel and a second channel. The first channel is used to connect a first inlet to one end of the first welding port, and the second channel is used to connect the first inlet to the other end of the first welding port. Protective gas can be evenly blown from both ends of the first welding port to the welding area, which can better cover the entire welding area and improve the welding quality and stability of the current collector.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing technology, and more specifically to a welding plate for a battery current collector. Background Technology

[0002] The production and assembly of cylindrical batteries involves multiple processes, including winding, flattening, current collector welding, penetration welding, sidewall welding, and sealing welding. Among these, current collector welding is a crucial step in ensuring battery performance. Current collector welding primarily involves pressing the current collector firmly and welding it to the top of the battery cell. To ensure the current collector and the cell's tabs are relatively fixed during welding, a welding pressure plate is typically used to limit the current collector's position. Simultaneously, to improve welding quality, protective gas is blown into the area to be welded during the welding process. For example, utility model patent CN222492588U discloses a current collector welding device. The current collector welding device includes: a first clamp and a laser welding machine. The first clamp includes a first pressure head and a first fixing component. The first fixing component is configured to fix a battery cell. The first pressure head is disposed opposite to the first fixing component and is configured to press the first current collector onto the first end of the battery cell. A positioning hole and a first welding hole are formed on the first surface of the first pressure head facing the first fixing component. The positioning hole is configured to accommodate a protrusion on the center part of the first current collector. The laser welding machine is disposed opposite to the first pressure head and away from the first fixing component. On one side of the fixed component, the laser emitted by the laser welding machine can irradiate the welding area of ​​the first current collector through the first welding hole to weld the first current collector to the tab on the first end of the battery cell; a first air inlet is also formed on the side wall of the first pressure head, which connects to the first welding hole. By setting the first air inlet, protective gas can be delivered to the first welding hole during the laser welding process of the positive current collector and the tab, thereby protecting the welding point; in this scheme, the method of drilling holes and blowing protective gas according to each weld is not only inconvenient to process, but also the blowing effect is reduced as the gas is blown from one side of the weld to the other, affecting the consistency of the welding effect of a single weld.

[0003] However, existing technologies also employ independent vent pipes to blow protective gas towards the welding area (side-axis blowing). When welding multiple seams on the current collector, the welding plate needs to be equipped with multiple independent vent pipes according to the welding position of each seam. Since the length of each vent pipe is different, it is difficult to ensure consistent blowing force for each weld. Furthermore, the unidirectional blowing direction of the independent channels results in excessive blowing force, failing to fully cover the welding area. This easily leads to porosity in the weld or spatter, thus affecting the welding quality of the current collector. In summary, existing technologies for welding battery current collectors, whether using perforated blowing with the welding plate or independent vent pipes, have certain drawbacks and cannot meet the requirements for high-quality welding. Therefore, an improved welding plate is needed to effectively solve the problems existing in the current technology and improve the quality and stability of current collector welding. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a welding plate for a battery current collector, which, by adding a first channel and a second channel to connect the two ends of the first welding port respectively, allows protective gas to be blown evenly from both ends of the first welding port to the welding area, thereby better covering the entire welding area and improving the quality and stability of the current collector welding.

[0005] This application provides a welding plate for a battery current collector, including a first cover plate and a second cover plate. The first cover plate has a positioning part adapted to the current collector, and a first welding port is provided on the surface of the first cover plate. The surface of the second cover plate has a second welding port adapted to the first welding port. The second cover plate has a receiving cavity for accommodating the positioning part, and an air inlet communicating with the receiving cavity is provided on the side wall of the second cover plate. The positioning part has a first channel and a second channel. The first channel is used to connect the air inlet and one end of the first welding port, and the second channel is used to connect the air inlet and the other end of the first welding port.

[0006] In this technical solution, the welding pressure plate is composed of a first cover plate and a second cover plate. This split design facilitates the processing and assembly of each part of the welding pressure plate. The first cover plate is provided with a positioning part that matches the current collector plate. The positioning part can fix the current collector plate well and ensure the stability of the current collector plate during the welding process. After fixing the current collector plate with the positioning part, the battery cell is placed on the current collector plate and clamped, so that the current collector plate and the battery cell are completely close together without gaps. A receiving cavity is provided on the second cover plate. The receiving cavity cooperates with the positioning part so that the first cover plate and the second cover plate can be tightly connected. The shape and size of the receiving cavity match the positioning part, ensuring the overall structural stability and compactness of the welding pressure plate. A first welding port and a second welding port are respectively provided on the first cover plate and the second cover plate. After the first cover plate and the second cover plate are combined, the first welding port and the second welding port are connected vertically to form a complete channel, providing an accurate welding path for laser welding. Laser welding is performed on the current collector plate through the channel formed by the first welding port and the second welding port.

[0007] The side wall of the second cover plate is provided with an air inlet, which is the key channel for protective gas to enter the interior of the welding pressure plate. After the protective gas enters the accommodating cavity through this air inlet, it can reach the welding area along the first and second channels on the positioning part, thus protecting the welding point. The first channel is connected to one end of the first weld joint, and the protective gas is blown into the outer ring of the weld through the first channel. The second channel is connected to the other end of the first weld joint, and the protective gas is blown into the inner ring of the weld through the second channel. The cooperation of the first and second channels allows the protective gas to enter the welding area from both ends of the first weld joint. By blowing the protective gas into the inner and outer rings simultaneously, the protective gas distribution in the welding area is ensured to be more uniform, reducing the interference of oxidation and impurities, thereby improving the welding quality, effectively avoiding problems such as porosity in the weld or spatter, and preventing uneven blowing force and incomplete coverage caused by a single blowing direction. It more effectively protects the welding point, ensuring that every part of the welding area is fully protected, thereby improving the welding quality and reducing welding defects.

[0008] As an improvement, the positioning part includes a first end face and a second end face facing each other. The first end face is used to abut against the collecting plate, and the second end face is used to abut against the receiving cavity. The first channel and the second channel are both disposed on the second end face. In this technical solution, the positioning part abuts against and positions the collecting plate through the first end face, ensuring that the collecting plate can be stably fixed on the positioning part during the welding process. The positioning part abuts against the receiving cavity through the second end face, so that it can fit tightly with the receiving cavity of the second cover plate, ensuring the structural stability of the entire welding pressure plate. The design of the first channel and the second channel being located on the second end face separates the flow channel of the protective gas from the fixed functional area of ​​the positioning part, avoiding direct contact between the first channel and the collecting plate, thereby reducing the potential impact of gas on the collecting plate. At the same time, placing the first channel and the second channel on the second end face can better utilize the space of the receiving cavity, allowing the gas to flow more smoothly from the air inlet through the channel to the first welding joint, reducing the resistance to gas flow, ensuring that the gas can be stably blown towards the welding area, and further improving the welding stability.

[0009] As an improvement, the first end face is formed by the inward recess of the positioning part, and the second end face is formed by the outward protrusion of the positioning part. In this technical solution, the first end face is formed by the inward recess of the positioning part. The recessed design can better fit the shape of the collector plate, providing more stable support and fixation. The second end face is formed by the outward protrusion of the positioning part. The protruding design can better cooperate with the receiving cavity of the second cover plate, ensuring the stability and tightness of the positioning part in the receiving cavity, reducing welding quality problems caused by structural loosening. On the other hand, the protruding design of the second end face cooperates with the receiving cavity to ensure the connectivity of the first and second channels and the smooth flow of gas, reducing the resistance to gas flow, ensuring that the gas can evenly cover the welding area, reducing the generation of porosity and weld slag, thereby improving the welding quality.

[0010] As an improvement, both the first and second channels are groove structures set on the first end face, and the openings of both the first and second channels face the receiving cavity. In this technical solution, both the first and second channels are groove structures, which allow the first and second channels to be formed on the surface of the positioning part, rather than inside the positioning part. The groove design reduces the complexity of processing, as the groove structure can be achieved through simple machining or mold forming. With the openings of the first and second channels facing the receiving cavity, after the positioning part abuts against the receiving cavity through the second end face, the groove structure of the first and second channels abuts against the inner wall of the receiving cavity to form a closed channel, ensuring that the protective gas can smoothly reach the welding area from the air inlet through the first and second channels. By designing the first and second channels as groove structures and making the openings face the receiving cavity, this welding pressure plate not only improves the welding quality, welding stability, and utilization efficiency of the protective gas, but also simplifies the production process, reduces the complexity of processing and assembly, and improves production efficiency.

[0011] As an improvement, multiple first and second channels are provided, and the first and second channels are distributed circumferentially along the second end face. In this technical solution, multiple first and second channels are provided on the second end face. Multiple channels can provide more gas flow paths, thereby cooperating with multiple first weld joints to more comprehensively cover the welding area. The multiple first and second channels are evenly distributed on the second end face to ensure that the protective gas can reach both ends of the first weld joint evenly. The distribution of the first and second channels circumferentially along the second end face allows the protective gas to enter the first and second channels from multiple directions, adapting to multiple first weld joints in different positions, providing a better protective effect, and thus improving the welding quality.

[0012] As an improvement, the air inlet includes a first air inlet and a second air inlet, each with multiple first and second air inlets. The first air inlet connects to a first channel, and the second air inlet connects to a second channel. In this technical solution, the air inlets are divided into a first air inlet and a second air inlet. The first air inlet connects to the first channel, allowing the protective gas from the first air inlet to directly enter the first channel. The second air inlet connects to the second channel, allowing the protective gas from the second air inlet to directly enter the second channel. This allows the air intake of the first and second channels to be independently controlled, thereby improving the overall efficiency of the system. By adding a first air inlet and a second air inlet, independent control and flow optimization of the first and second channels are achieved, resulting in a more uniform distribution of the protective gas.

[0013] As an improvement, the first channel and the first weld joint are on the same straight line so that one end of the first channel and the first weld joint are connected in the forward direction, and the second channel is connected to the center point of the second end face so that the other end of the second channel and the first weld joint are connected laterally. In this technical solution, the first channel and the first weld joint are on the same straight line, so that one end of the first channel and the first weld joint are directly connected. This end refers to the outward end of the first weld joint, ensuring that the protective gas in the first air inlet reaches the first weld joint through the shortest path, reducing gas flow resistance. The second channel is laterally connected to the other end of the first weld joint, which refers to the inward end of the first weld joint. The length of the first channel is less than the length of the second channel. The first channel and the second channel are distributed alternately, that is, there is a second channel on both sides of a first weld joint. Each first weld hole is laterally connected to two second channels, thereby compensating for the longer path of the protective gas from the second channel to the first weld joint, and the protective gas distribution is more uniform. The second channel is connected to the center point of the disk, that is, multiple second channels are interconnected through the center point of the disk, allowing the protective gas to flow freely between multiple second channels, thereby making the protective gas flow more efficiently in the inner ring of the weld and improving welding efficiency.

[0014] As an improvement, the first weld joint is elongated, and the second end face is provided with a first guide slope communicating with the first weld joint. In this technical solution, the elongated weld joint can cover a longer welding area, which is suitable for scenarios such as continuous welding or long welds. The first guide slope on the second end face communicating with the first weld joint can guide the protective gas smoothly and evenly into the first weld joint, ensuring smooth gas flow, reducing resistance and turbulence when the gas enters the first weld joint, further improving the uniformity of gas distribution, effectively reducing the interference of oxidation and impurities during the welding process, thereby improving the welding quality.

[0015] As an improvement, the first guide slope is provided with a first notch and a second notch. One end of the first weld joint is connected to the first channel through the first notch, and the other end of the first weld joint is connected to the second channel through the second notch. There are two second notches. In this technical solution, the first notch on the first guide slope connects one end of the first weld joint to the first channel, reducing the resistance and turbulence of the shielding gas when entering the weld joint, and further improving the uniformity of the shielding gas distribution. A second channel is distributed on both sides of each first weld joint, and two second notches are provided on the first guide slope. The other end of the first weld joint is connected to the second channels on both sides through these two second notches, respectively, ensuring a more uniform distribution of shielding gas in the weld area and improving welding efficiency.

[0016] As an improvement, the surface of the first cover plate is provided with multiple first connecting holes, and the surface of the second cover plate is provided with multiple second connecting holes opposite to the first connecting holes. Both the first and second connecting holes are connected to fasteners to lock the first and second cover plates together. In this technical solution, after the first and second cover plates are closed, the first and second connecting holes are connected. By connecting fasteners, the first and second cover plates are locked together, ensuring a tight fit between the two cover plates to form a single integrated structure. This reduces structural damage caused by loosening or vibration. The fasteners can be bolts, screws, or other types of fixing devices. The tight connection ensures the sealing of the welding area and improves the structural stability and reliability of the welding pressure plate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the welding pressure plate of a battery current collector according to this application.

[0018] Figure 2 This is an exploded structural diagram of the welding pressure plate of a battery current collector according to this application.

[0019] Figure 3 This is a three-dimensional structural diagram of the first cover plate in this application.

[0020] Figure 4 This is a cross-sectional structural schematic diagram of the welding pressure plate of a battery current collector according to this application.

[0021] Figure 5 This is a perspective view of the welding plate of a battery current collector according to this application.

[0022] As shown in the figure: 1. First cover plate; 11. Positioning part; 111. First end face; 112. Second end face; 12. First weld joint; 13. First channel; 14. Second channel; 15. First guide slope; 151. First notch; 152. Second notch; 16. First connecting hole; 2. Second cover plate; 21. Accommodating cavity; 22. Second weld joint; 23. First air inlet; 24. Second air inlet; 25. Second connecting hole. Detailed Implementation

[0023] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0024] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0025] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and constructions may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0026] Furthermore, it should be noted that the terms "installation," "setting," "equipped with," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components; they can refer to a direct installation on another component or the possible presence of another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figures 1 to 5 As shown, this application discloses a welding plate for a battery current collector, including a first cover plate 1 and a second cover plate 2. The first cover plate 1 is provided with a positioning part 11 adapted to the current collector, and the second cover plate 2 is provided with a receiving cavity 21 for accommodating the positioning part 11. The welding plate is composed of the first cover plate 1 and the second cover plate 2. This split design can facilitate the processing and assembly of each part of the welding plate. The first cover plate 1 is provided with a positioning part 11 adapted to the current collector. The positioning part 11 can fix the current collector well and ensure the stability of the current collector position during the welding process. After fixing the current collector by the positioning part 11, the battery cell is placed on the current collector and clamped to make the current collector and the battery cell completely close together without gaps. A receiving cavity is provided on the second cover plate 2. The receiving cavity cooperates with the positioning part 11 so that the first cover plate 1 and the second cover plate 2 can be tightly connected. The shape and size of the receiving cavity 21 match the positioning part 11, ensuring the overall structural stability and compactness of the welding plate.

[0028] like Figure 2 , Figure 4 and Figure 5As shown, the surface of the first cover plate 1 is provided with a first welding port 12, and the surface of the second cover plate 2 is provided with a second welding port 22 that matches the first welding port 12. After the first cover plate 1 and the second cover plate 2 are combined, the first welding port 12 and the second welding port 22 are connected vertically to form a complete channel, providing an accurate welding path for laser welding. Laser welding is performed on the manifold through the channel formed by the first welding port 12 and the second welding port 22.

[0029] like Figures 2 to 5 As shown, the side wall of the second cover plate 2 is provided with an air inlet communicating with the accommodating cavity 21. The positioning part 11 is provided with a first channel 13 and a second channel 14. The first channel 13 is used to connect the air inlet to one end of the first weld joint 12, and the second channel 14 is used to connect the air inlet to the other end of the first weld joint 12. The air inlet is the key channel for protective gas to enter the interior of the welding pressure plate. After the protective gas enters the accommodating cavity 21 through this air inlet, it can reach the welding area along the first channel 13 and the second channel 14 on the positioning part 11, thus protecting the welding point. The first channel 13 is connected to one end of the first weld joint 12. The protective gas is blown into the outer ring of the weld through the first channel 13, and the second channel 14... Connected to the other end of the first weld joint 12, the shielding gas is blown into the inner ring of the weld through the second channel 14. The first channel 13 and the second channel 14 cooperate to allow the shielding gas to enter the welding area from both ends of the first weld joint 12. By blowing the shielding gas into the inner and outer rings simultaneously, the shielding gas distribution in the welding area is ensured to be more uniform, reducing the interference of oxidation and impurities, thereby improving the welding quality, effectively avoiding problems such as porosity in the weld or spattering of weld chips, and preventing uneven blowing force and incomplete coverage caused by a single blowing direction. This more effectively protects the welding point and ensures that every part of the welding area is fully protected, thereby improving the welding quality and reducing welding defects.

[0030] More specifically, such as Figures 2 to 5As shown, the positioning part 11 includes a first end face 111 and a second end face 112 facing each other. The first end face 111 is used to abut against the collecting plate, and the second end face 112 is used to abut against the receiving cavity 21. The first channel 13 and the second channel 14 are both disposed on the second end face 112. The positioning part 11 abuts against and positions the collecting plate through the first end face 111, ensuring that the collecting plate can be stably fixed on the positioning part 11 during the welding process. The positioning part 11 abuts against the receiving cavity 21 through the second end face 112, so that it can fit tightly with the receiving cavity 21 of the second cover plate 2, ensuring the structural stability of the entire welding pressure plate; the first channel 13 is designed to fit against the receiving cavity 21 of the second cover plate 2. The first channel 13 and the second channel 14 are both located on the second end face 112, which separates the flow channel of the protective gas from the fixed functional area of ​​the positioning part 11, avoiding direct contact between the first channel 13 and the second channel 14 and the collector plate, thereby reducing the potential impact of the gas on the collector plate. At the same time, setting the first channel 13 and the second channel 14 on the second end face 112 can better utilize the space of the accommodating cavity 21, allowing the gas to reach the first welding port 12 more smoothly from the air inlet through the channel, reducing the resistance to gas flow, ensuring that the gas can be blown stably to the welding area, and further improving the welding stability.

[0031] More specifically, such as Figure 2 and Figure 3 As shown, the first end face 111 is recessed inward by the positioning part 11, and the second end face 112 is protruded outward by the positioning part 11. The recessed design of the first end face 111 better fits the shape of the collector plate, providing more stable support and fixation. The protruding design of the second end face 112 better matches the receiving cavity 21 of the second cover plate 2, ensuring the stability and tightness of the positioning part 11 within the receiving cavity 21, reducing welding quality problems caused by structural loosening. On the other hand, the protruding design of the second end face 112 matches the receiving cavity 21, ensuring the connectivity of the first channel 13 and the second channel 14 and the smoothness of gas flow, reducing gas flow resistance, ensuring that the gas can evenly cover the welding area, reducing the generation of porosity and weld slag, thereby improving welding quality.

[0032] More specifically, such as Figure 2 and Figure 3As shown, both the first channel 13 and the second channel 14 are groove structures disposed on the first end face 111. The openings of both the first channel 13 and the second channel 14 face the receiving cavity 21. The groove structure allows the first channel 13 and the second channel 14 to be formed on the surface of the positioning part 11, rather than inside the positioning part 11. The groove design reduces the complexity of processing, as the groove structure can be achieved through simple machining or mold forming. The fact that the openings of both the first channel 13 and the second channel 14 face the receiving cavity 21 facilitates positioning... After part 11 abuts against the accommodating cavity 21 via the second end face 112, the first channel 13 and the second channel 14 of the groove structure abut against the inner wall of the accommodating cavity 21 to form a closed channel, ensuring that the protective gas can smoothly reach the welding area from the air inlet through the first channel 13 and the second channel 14. By designing the first channel 13 and the second channel 14 as a groove structure and making the opening face the accommodating cavity 21, this welding pressure plate not only improves the welding quality, welding stability and the utilization efficiency of the protective gas, but also simplifies the production process, reduces the complexity of processing and assembly, and improves production efficiency.

[0033] More specifically, such as Figure 3 and Figure 5 As shown, multiple first channels 13 and second channels 14 are provided. The first channels 13 and second channels 14 are distributed circumferentially along the second end face 112. The multiple channels provide more gas flow paths, thereby cooperating with multiple first weld joints 12 to more comprehensively cover the welding area. The multiple first channels 13 and second channels 14 are evenly distributed on the second end face 112 to ensure that the protective gas can reach both ends of the first weld joints 12 evenly. The first channels 13 and second channels 14 are distributed circumferentially along the second end face 112, and the protective gas can enter the first channels 13 and second channels 14 from multiple directions to adapt to multiple first weld joints 12 in different positions, providing better protection and thus improving welding quality.

[0034] More specifically, such as Figure 2 and Figure 5As shown, the air inlet includes a first air inlet 23 and a second air inlet 24. Multiple first air inlets 23 and 24 are provided. The first air inlet 23 connects to the first channel 13, and the second air inlet 24 connects to the second channel 14. The air inlets are divided into a first air inlet 23 and a second air inlet 24. The first air inlet 23 connects to the first channel 13, allowing the protective gas to directly enter the first channel 13. The second air inlet 24 connects to the second channel 14, allowing the protective gas to directly enter the second channel 14. This allows the air intake of the first channel 13 and the second channel 14 to be independently controlled, thereby improving the overall efficiency of the system. By adding the first air inlet 23 and the second air inlet 24, independent control and flow optimization of the first channel 13 and the second channel 14 are achieved, resulting in a more uniform distribution of the protective gas.

[0035] More specifically, such as Figure 3 and Figure 5 As shown, the first channel 13 and the first weld joint 12 are on the same straight line, so that one end of the first channel 13 and the first weld joint 12 are positively connected. The second channel 14 is connected to the center point of the second end face 112, so that the other end of the second channel 14 and the first weld joint 12 are laterally connected. The first channel 13 and the first weld joint 12 are on the same straight line, so that one end of the first channel 13 and the first weld joint 12 are positively connected. This end refers to the outward end of the first weld joint 12. This ensures that the protective gas in the first air inlet 23 reaches the first weld joint 12 through the shortest path, reducing gas flow resistance. The second channel 14 is laterally connected to the other end of the first weld joint 12. This end refers to the outward end of the first weld joint 12. At the inward-facing end of a weld joint 12, the length of the first channel 13 is shorter than the length of the second channel 14. The first channel 13 and the second channel 14 are distributed at intervals, that is, there is a second channel 14 on both sides of a first weld joint 12. Each first weld joint is laterally connected to two second channels 14, thereby compensating for the defect that the shielding gas has a longer path from the second channel 14 to the first weld joint 12, and the shielding gas is more evenly distributed. The second channel 14 is connected to the center point of the disk, that is, multiple second channels 14 are interconnected through the center point of the disk, allowing the shielding gas to flow freely between multiple second channels 14, thereby making the shielding gas flow more efficiently in the inner ring of the weld and improving welding efficiency.

[0036] More specifically, such as Figure 3As shown, the first weld joint 12 is elongated, and the second end face 112 is provided with a first guide slope 15 communicating with the first weld joint 12. The elongated weld joint can cover a longer welding area and is suitable for continuous welding or long weld seams. The first guide slope 15 communicating with the first weld joint 12 on the second end face 112 can guide the protective gas to enter the first weld joint 12 smoothly and evenly, ensuring smooth gas flow, reducing the resistance and turbulence of the gas when entering the first weld joint 12, further improving the uniformity of gas distribution, effectively reducing the interference of oxidation and impurities during the welding process, thereby improving the welding quality.

[0037] More specifically, such as Figure 3 As shown, the first guide slope 15 is provided with a first notch 151 and a second notch 152. One end of the first weld joint 12 is connected to the first channel 13 through the first notch 151, and the other end of the first weld joint 12 is connected to the second channel 14 through the second notch 152. There are two second notches 152. The first guide slope 15 is provided with a first notch 151, which connects one end of the first weld joint 12 to the first channel 13, reducing the resistance and turbulence of the shielding gas when entering the weld joint, and further improving the uniformity of the shielding gas distribution. There is a second channel 14 distributed on both sides of each first weld joint 12. Two second notches 152 are provided on the first guide slope 15, and the other end of the first weld joint 12 is connected to the second channels 14 on both sides through these two second notches 152, respectively, to ensure that the shielding gas distribution in the weld area is more uniform and improve the welding efficiency.

[0038] More specifically, such as Figure 2 As shown, the surface of the first cover plate 1 is provided with a plurality of first connecting holes 16, and the surface of the second cover plate 2 is provided with a plurality of second connecting holes 25 opposite to the first connecting holes 16. Both the first connecting holes 16 and the second connecting holes 25 are connected with fasteners to lock the first cover plate 1 and the second cover plate 2 together. After the first cover plate 1 and the second cover plate 2 are closed, the first connecting holes 16 and the second connecting holes 25 are connected. By connecting the fasteners, the first cover plate 1 and the second cover plate 2 are locked together, ensuring that the two cover plates fit tightly together to form an integral structure, reducing structural damage caused by loosening or vibration. The fasteners can be bolts, screws or other types of fixing devices. The tight connection can ensure the sealing of the welding area and improve the structural stability and reliability of the welding pressure plate.

[0039] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A battery tab welding press plate, characterized by, The device includes a first cover plate (1) and a second cover plate (2). The first cover plate (1) is provided with a positioning part (11) adapted to the collector plate. The surface of the first cover plate (1) is provided with a first welding port (12). The surface of the second cover plate (2) is provided with a second welding port (22) adapted to the first welding port (12). The second cover plate (2) is provided with a receiving cavity (21) for accommodating the positioning part (11). The side wall of the second cover plate (2) is provided with an air inlet communicating with the receiving cavity (21). The positioning part (11) is provided with a first channel (13) and a second channel (14). The first channel (13) is used to connect the air inlet and one end of the first welding port (12). The second channel (14) is used to connect the air inlet and the other end of the first welding port (12).

2. The battery tab welding press plate of claim 1, wherein, The positioning part (11) includes a first end face (111) and a second end face (112) opposite to each other. The first end face (111) is used to abut against the collector plate, and the second end face (112) is used to abut against the receiving cavity (21). The first channel (13) and the second channel (14) are both disposed on the second end face (112).

3. The battery tab welding press plate of claim 2, wherein, The first end face (111) is formed by the positioning part (11) being recessed inward, and the second end face (112) is formed by the positioning part (11) being protruded outward.

4. A battery tab welding press plate according to claim 2 or 3, wherein The first channel (13) and the second channel (14) are both groove structures provided on the first end face (111), and the openings of the first channel (13) and the second channel (14) are both facing the receiving cavity (21).

5. The battery tab welding press plate of claim 2, wherein, Multiple first channels (13) and second channels (14) are provided, and the first channels (13) and second channels (14) are distributed circumferentially along the second end face (112).

6. A battery tab welding press plate according to claim 5, wherein, The air inlet includes a first air inlet (23) and a second air inlet (24). Multiple first air inlets (23) and second air inlets (24) are provided. The first air inlet (23) is used to connect to the first channel (13), and the second air inlet (24) is used to connect to the second channel (14).

7. The welding pressure plate of a battery current collector according to claim 2 or 5, characterized in that, The first channel (13) and the first weld (12) are on the same straight line so that one end of the first channel (13) and the first weld (12) are connected in the positive direction. The second channel (14) is connected to the center point of the second end face (112) so that the other end of the second channel (14) is connected in the side.

8. The welding pressure plate for a battery current collector according to claim 2, characterized in that, The first weld joint (12) is elongated, and the second end face (112) is provided with a first guide slope (15) that communicates with the first weld joint (12).

9. The welding pressure plate for a battery current collector according to claim 8, characterized in that, The first guide slope (15) is provided with a first notch (151) and a second notch (152). One end of the first weld joint (12) is connected to the first channel (13) through the first notch (151), and the other end of the first weld joint (12) is connected to the second channel (14) through the second notch (152). There are two second notches (152).

10. The welding pressure plate of a battery current collector according to claim 1, characterized in that, The surface of the first cover plate (1) is provided with a plurality of first connecting holes (16), and the surface of the second cover plate (2) is provided with a plurality of second connecting holes (25) opposite to the first connecting holes (16). The first connecting holes (16) and the second connecting holes (25) are both connected with fasteners so that the first cover plate (1) and the second cover plate (2) are closed and locked.

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