Collector plate welding pressure head

Abstract

The utility model provides a collector plate welding pressure head, which relates to the technical field of battery manufacturing, and comprises an adsorption plate and a support plate which are laminated and closely arranged, the adsorption plate is provided with an attachment surface for attaching a collector plate and a welding hole penetrating towards the attachment surface, the attachment surface is provided with a negative pressure adsorption hole, a protective gas channel is arranged in the adsorption plate, and the protective gas channel is communicated with the support plate. The protective gas channel is communicated to the welding hole; the supporting plate is fixedly connected to the opposite face, away from the attaching face, of the adsorption plate, a negative pressure gas channel is formed in the supporting plate and communicates with the negative pressure adsorption holes of the adsorption plate, and a protective gas input hole is further formed in the supporting plate and communicates with the protective gas channel. Therefore, according to the collector plate welding pressure head, the adsorption plate and the supporting plate are arranged in a stacked mode, the negative pressure adsorption channel and the protective gas conveying channel are integrated, and the collector plate welding pressure head is simple in overall structure, convenient to manufacture and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to a current collecting plate welding pressure head. Background Art

[0002] The battery manufacturing process involves multiple steps. Among them, when producing batteries, the collector plate needs to be pressed and welded to the end of the battery cell. In the relevant pressing and welding step, the collector plate and the battery cell need to be pressed with a welding head, and during the welding process, a protective gas needs to be blown to the welding point.

[0003] In the prior art, the welding head of the current collecting plate needs to adopt a vacuum adsorption method to fix the current collecting plate, and at the same time, the welding head also needs to meet the real-time delivery of the shielding gas to improve the welding quality. However, in the existing welding head, the vacuum exhaust channel and the shielding gas delivery are both arranged inside the welding head, resulting in a complex structure and high manufacturing cost, or the vacuum exhaust structure and the shielding gas delivery structure are arranged separately, resulting in excessive space occupation. Utility Model Content

[0004] The utility model provides a collecting plate welding pressure head, which is used to solve the defects of the collecting plate welding pressure head in the prior art, in which the vacuum exhaust channel and the protective gas delivery are both arranged inside the collecting plate welding pressure head, resulting in a complex structure and high production cost, or the vacuum exhaust structure and the protective gas delivery structure are arranged separately, resulting in excessive space occupation.

[0005] The utility model provides a current collecting plate welding pressure head, comprising: an adsorption plate and a support plate, wherein the adsorption plate and the support plate are stacked and closely arranged, wherein:

[0006] The adsorption plate is provided with an attachment surface for attaching the current collecting plate and a welding hole penetrating toward the attachment surface, the attachment surface is provided with a negative pressure adsorption hole, and a protective gas channel is provided in the adsorption plate, and the protective gas channel is connected to the welding hole;

[0007] The support plate is fixedly connected to the opposite surface of the adsorption plate facing away from the attachment surface. A negative pressure gas channel is arranged in the support plate, and the negative pressure gas channel is connected to the negative pressure adsorption hole of the adsorption plate. A protective gas input hole is also arranged in the support plate, and the protective gas input hole is connected to the protective gas channel.

[0008] According to a collecting plate welding pressure head provided by the utility model, the protective gas channel is arranged on the end surface of the adsorption plate facing the support plate, and the support plate is closely attached to the end surface of the adsorption plate to close the protective gas channel.

[0009] According to a collecting plate welding pressure head provided by the utility model, the number of the welding holes is multiple, and each of the welding holes is connected to the protective gas channel.

[0010] According to a current collecting plate welding pressure head provided by the utility model, the number of the negative pressure adsorption holes is multiple, and the multiple welding holes are arranged between the multiple negative pressure adsorption holes at intervals.

[0011] According to a collecting plate welding pressure head provided by the utility model, the protective gas channel includes a main flow groove and a plurality of branch flow grooves, the ends of the branch flow grooves are connected to the welding holes one by one, and the other ends are connected to the main flow groove, and the protective gas input hole is connected to the main flow groove.

[0012] According to a collecting plate welding head provided by the utility model, a first airflow guiding surface and a second airflow guiding surface are arranged at a position of the protective gas channel close to the welding hole, the first airflow guiding surface and the second airflow guiding surface are arranged opposite to each other, and the distance between the first airflow guiding surface and the second airflow guiding surface gradually increases in the flow direction of the protective gas.

[0013] According to a collecting plate welding pressure head provided by the utility model, a gas circulation area is formed between the first airflow guiding surface and the second airflow guiding surface, the support plate is provided with an airflow guiding block close to the end surface of the adsorption plate, the airflow guiding block is protruded in the gas circulation area, and the airflow guiding block has a guiding surface for guiding the protective gas to flow downward toward the collecting plate.

[0014] According to a collector plate welding pressure head provided by the utility model, the protective gas channel is arranged on two opposite sides of the attachment surface.

[0015] According to a current collecting plate welding pressure head provided by the utility model, a sealing gasket is provided at the connection between the negative pressure adsorption hole and the negative pressure gas channel.

[0016] According to a current collecting plate welding pressure head provided by the utility model, the adsorption plate is provided with a threaded hole, the support plate is provided with a mounting hole corresponding to the position of the threaded hole, and the adsorption plate and the support plate are fixedly connected via bolts arranged in the mounting hole and the threaded hole.

[0017] The collecting plate welding pressure head provided by the utility model includes a stacked adsorption plate and a support plate, the adsorption plate is provided with an attachment surface, the attachment surface is provided with negative pressure adsorption holes, and the negative pressure gas channel provided inside the support plate can be connected with the negative pressure adsorption holes. When the collecting plate is placed on the attachment surface in the adsorption plate, the negative pressure adsorption holes can adsorb and fix the collecting plate. The adsorption plate is also provided with a protective gas channel, and the protective gas channel is connected to the welding hole, so that the protective gas can be delivered to the welding hole. The collecting plate welding pressure head of the utility model integrates the negative pressure adsorption channel and the protective gas delivery channel into one by stacking the adsorption plate and the support plate. The overall structure is simple, the manufacturing is convenient, and the space occupied is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of a current collecting plate welding pressure head according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A schematic structural diagram of the collector plate welding pressure head from another perspective shown in FIG.

[0021] Figure 3 yes Figure 1 A schematic structural diagram of the collector plate welding pressure head from another perspective shown in FIG.

[0022] Figure 4 yes Figure 1 A bottom view of an adsorption plate in a current collecting plate welding head shown in FIG.

[0023] Figure 5 yes Figure 1 A top view of an adsorption plate in a current collecting plate welding head shown in FIG.

[0024] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the adsorption plate in the current collecting plate welding pressure head shown in FIG.

[0025] Figure 7 yes Figure 1 A top view of the support plate in the collector plate welding head shown in FIG.

[0026] Figure 8 yes Figure 1 A cross-sectional view of the collector plate welding head shown in FIG.

[0027] Fig. 9 yes Figure 1 A schematic diagram of the three-dimensional structure of the support plate in the current collecting plate welding pressure head shown in FIG.

[0028] Fig.10 yes Figure 1 FIG. 1 is a schematic diagram of the three-dimensional structure of the support plate in the current collecting plate welding pressure head from another perspective.

[0029] Reference numerals:

[0030] 1. Adsorption plate; 11. Attachment surface; 12. Welding hole; 13. Negative pressure adsorption hole; 14. Shielding gas channel; 141. Main flow slot; 142. Branch flow slot; 2. Support plate; 21. Negative pressure gas channel; 211. Negative pressure connecting hole; 22. Shielding gas input hole; 23. Airflow guide block; 24. Welding slot; 31. Base; 32. Receiver; 321. Center; 322. Extension; 41. First airflow guiding surface; 42. Second airflow guiding surface. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In one embodiment of the present invention, a current collecting plate welding pressure head is provided, which includes a stacked adsorption plate and a support plate, wherein a negative pressure gas channel is provided in the support plate, and the negative pressure gas channel is connected to the negative pressure adsorption hole in the adsorption plate, which can adsorb the current collecting plate placed on the adsorption plate, a protective gas channel is provided in the adsorption plate, and a protective gas input hole is provided in the support plate, which can deliver protective gas to the welding hole. The overall structure of the current collecting plate welding pressure head is simple, easy to manufacture, and occupies less space. The following is combined with Figures 1 to 10 The figure further describes the current collecting plate welding head in this embodiment.

[0033] Specifically, if Figures 1 to 3 As shown, the current collecting plate welding head in this embodiment includes: an adsorption plate 1 and a support plate 2, wherein the adsorption plate 1 and the support plate 2 are stacked and closely arranged.

[0034] For example, the adsorption plate 1 and the support plate 2 are both constructed of a flat plate with a certain thickness, and the adsorption plate 1 and the support plate 2 are stacked and closely attached together in a common thickness direction. The adsorption plate 1 can be used to adsorb and fix the current collecting plate, and the current collecting plate is usually abutted to the adsorption plate 1 from bottom to top, so the upper end surface of the adsorption plate 1 can be attached to the lower end surface of the support plate 2.

[0035] Furthermore, if Figure 2 , Figures 4 to 6 As shown, the adsorption plate 1 is provided with an attachment surface 11 for attaching the collecting plate and a welding hole 12 passing through the attachment surface 11 , the attachment surface 11 is provided with a negative pressure adsorption hole 13 , and a protective gas channel 14 is provided in the adsorption plate 1 , and the protective gas channel 14 is connected to the welding hole 12 .

[0036] It can be understood that in this embodiment, the adsorption plate 1 is provided with an attachment surface 11 for placing the collecting plate, and the attachment surface 11 is provided with negative pressure adsorption holes 13. At the same time, the adsorption plate 1 is also provided with welding holes 12 penetrating the attachment surface 11.

[0037] In actual use, the collecting plate can be placed and attached to the attachment surface 11 via an external driving mechanism, and then the negative pressure adsorption holes 13 can generate negative pressure and fix the collecting plate, and the welding equipment can weld the collecting plate with the help of the welding holes 12.

[0038] Furthermore, if Figure 7 As shown, the support plate 2 is fixedly connected to the opposite surface of the adsorption plate 1 facing away from the attachment surface 11, and a negative pressure gas channel 21 is arranged in the support plate 2, and the negative pressure gas channel 21 is connected to the negative pressure adsorption hole 13 of the adsorption plate 1. A protective gas input hole 22 is also arranged in the support plate 2, and the protective gas input hole 22 is connected to the protective gas channel 14.

[0039] In this embodiment, a negative pressure gas channel 21 is provided inside the support plate 2, one end of the negative pressure gas channel 21 is connected to the negative pressure adsorption hole 13, and the other end can be connected to a negative pressure device. The negative pressure device can vacuum the negative pressure gas channel 21, thereby generating a negative pressure in the negative pressure adsorption hole 13, and finally fixing the collecting plate attached to the attachment surface 11.

[0040] Moreover, the shielding gas input hole 22 on the support plate 2 can be connected to the shielding gas delivery equipment. When the collecting plate is welded, the shielding gas output by the shielding gas delivery equipment can reach the welding hole 12 via the shielding gas input hole 22 and the shielding gas channel 14, thereby protecting the welding point.

[0041] It can be seen that in this embodiment, the positions of the negative pressure gas channel 21 and the protective gas channel 14 can be reasonably arranged by stacking the adsorption plate 1 and the support plate 2, with a simple structure, low manufacturing cost, and small occupied space.

[0042] In actual use, the protective gas channel 14 can be set inside the adsorption plate 1 by means of a drilling tool, or can be set on the end surface of the adsorption plate 1 by means of a slotting tool. Among them, the processing and manufacturing cost of setting the protective gas channel 14 on the end surface of the adsorption plate 1 by using a slotting tool is lower.

[0043] In this embodiment, in order to reduce the manufacturing cost, the protective gas passage 14 is provided on the end surface of the adsorption plate 1 facing the support plate 2 , and the support plate 2 is closely attached to the end surface of the adsorption plate 1 to close the protective gas passage 14 .

[0044] As a way to achieve this, Figure 5 and Figure 6 As shown, the adsorption plate 1 is attached to the upper end surface of the support plate 2 to form a continuous groove structure with an open upper end, and the protective gas input hole 22 corresponds to the position of the groove structure in the thickness direction of the support plate 2. The groove structure is the protective gas channel 14.

[0045] In actual use, the lower end surface of the support plate 2 is in close contact with the upper end surface of the adsorption plate 1, and the close contact between the support plate 2 and the adsorption plate 1 can close the upper end opening of the shielding gas channel 14, thereby forming a delivery channel for delivering shielding gas, and the shielding gas input hole 22 is connected to the shielding gas channel 14, and the shielding gas channel 14 is connected to the welding hole 12. Therefore, when the shielding gas delivery device is connected to the shielding gas input hole 22, the shielding gas can smoothly reach the welding hole 12.

[0046] In this embodiment, if Figure 5 As shown, the adsorption plate 1 may include a base 31 and a receiving seat 32 , and the attachment surface 11 is disposed on the receiving seat 32 .

[0047] Exemplarily, the adsorption plate 1 includes a base 31 that can play a supporting and fixing role. For example, the base 31 can be fixedly connected to the support plate 2. In addition, a circular hole penetrating along the thickness direction of the base 31 is provided, and the receiving seat 32 is fixedly arranged in the circular hole. At the same time, the receiving seat 32 is fixedly connected to the inner wall of the circular hole, and the collecting plate can directly abut against the attachment surface 11 of the receiving seat 32.

[0048] Optionally, the base 31 and the receiving seat 32 may be an integrally formed structure. Moreover, the attachment surface 11 on the receiving seat 32 may be higher than the lower surface of the base 31 .

[0049] Accordingly, in order to facilitate welding, such as Figure 7As shown, the support plate 2 is provided with a welding through groove 24 at a position corresponding to the welding hole 12 , and the welding through groove 24 is located above the receiving seat 32 .

[0050] In actual use, after the current collecting plate is fixed to the attachment surface 11 of the receiving seat 32 from bottom to top, the welding equipment can perform welding processing on the current collecting plate through the welding groove 24 of the support plate 2.

[0051] In this embodiment, there are a plurality of welding holes 12 , and each welding hole 12 is connected to the protective gas channel 14 .

[0052] Specifically, in a specific embodiment, Figure 5 and Figure 6 As shown, the number of welding holes 12 can be six. The receiving seat 32 includes a central portion 321 and a plurality of extension portions 322, the plurality of extension portions 322 are sequentially arranged at intervals along the circumference of the central portion 321, one end of each of the plurality of extension portions 322 is connected to the central portion 321, and the other end is connected to the base 31, and the welding hole 12 is located between adjacent extension portions 322.

[0053] Exemplarily, there are six extensions 322, which are arranged in sequence and spaced around the central portion 321, one end of each of the six extensions 322 is connected to the central portion 321, and the other end is connected to the inner wall of the circular hole, and the lower surface of the six extensions 322 is flush with the lower surface of the central portion 321, thereby forming an attachment surface 11. Accordingly, six welding holes 12 arranged in an annular manner are formed between the six extensions 322.

[0054] In actual use, the collecting plate can be directly abutted against the attachment surface 11 formed by the extension portion 322 and the central portion 321 , and then the collecting plate is fixed under the vacuum action of the negative pressure adsorption holes 13 , and the welding equipment can weld the collecting plate through the six welding holes 12 .

[0055] In order to allow each welding hole 12 to receive the protective gas, in this embodiment, Figure 5 As shown, the shielding gas channel 14 includes a main flow groove 141 and a plurality of branch flow grooves 142 , the ends of the plurality of branch flow grooves 142 are connected to the welding holes 12 one by one, and the other ends are connected to the main flow groove 141 , and the shielding gas input hole 22 is connected to the main flow groove 141 .

[0056] Thus, the shielding gas can flow to the plurality of branch flow grooves 142 respectively through the shielding gas input hole 22 and the main flow groove 141, and then reach the plurality of welding holes 12, thereby realizing protection of the welding points.

[0057] Optionally, there are multiple negative pressure adsorption holes, and multiple welding holes are arranged at intervals between the multiple negative pressure adsorption holes.

[0058] Specifically, the negative pressure adsorption holes 13 can be arranged on the extension part 322. For example, each extension part 322 is provided with a negative pressure adsorption hole 13, the position of the negative pressure adsorption hole 13 is far away from the central part 321, and the position of the negative pressure adsorption hole 13 is symmetrically arranged relative to the position of the central part 321, thereby applying a uniform adsorption force to the collector plate to avoid positional deviation of the collector plate during welding.

[0059] Or, if Figure 4 As shown, negative pressure adsorption holes 13 are only provided on four extension portions 322 , and the positions of the four negative pressure adsorption holes 13 relative to the central portion 321 are symmetrical in left and right directions and in top and bottom directions.

[0060] In one embodiment, Figure 5 As shown, the protective gas channels 14 may be symmetrically disposed on opposite sides of the attachment surface 11 .

[0061] Specifically, there are two shielding gas channels 14, which are symmetrically arranged on opposite sides of the attachment surface 11. Each shielding gas channel 14 includes a main flow groove 141 and three branch flow grooves 142, and one end of each of the three branch flow grooves 142 is connected to the main flow groove 141 at a different position, and the other end is connected to the welding holes 12 at different positions.

[0062] Furthermore, if Figure 5 and Figure 6 As shown, in the thickness direction of the adsorption plate 1 , the protective gas channel 14 can be connected to the top of the receiving seat 32 .

[0063] Thus, when the collecting plate is fixed to the attachment surface 11 of the receiving seat 32 from below, the protective gas channel 14 can deliver protective gas to the welding position of the collecting plate from above the receiving seat 32. This arrangement can ensure timely delivery of protective gas without interfering with the welding process of the collecting plate.

[0064] Furthermore, in order to ensure that the shielding gas can fully flow in each welding hole 12, as Figure 5 As shown, the first airflow guiding surface 41 and the second airflow guiding surface 42 are set at the position of the protective gas channel 14 near the welding hole 12. The first airflow guiding surface 41 and the second airflow guiding surface 42 are arranged opposite to each other, and the distance between the first airflow guiding surface 41 and the second airflow guiding surface 42 gradually increases in the flow direction of the protective gas.

[0065] It can be understood that in the present embodiment, a first airflow guiding surface 41 and a second airflow guiding surface 42 are provided at the position where the branch flow groove 142 is connected to the welding hole 12, wherein the first airflow guiding surface 41 and the second airflow guiding surface 42 are roughly constructed in a V-shape, and the opening formed by the two airflow guiding surfaces gradually becomes larger toward the welding hole 12, thereby, the shielding gas from the branch flow groove 142 can fully flow to various positions of the welding hole 12, ensuring that the shielding gas can protect different welding points.

[0066] Since the collecting plate needs to be fixed to the attachment surface 11 of the receiving seat 32 from below, and the shielding gas channel 14 is arranged above the receiving seat 32, in order to allow the shielding gas to flow to the welding point more effectively, the flow direction of the shielding gas needs to be properly guided.

[0067] In this regard, in this embodiment, if Figure 5 As shown, a gas flow area is formed between the first gas flow guiding surface 41 and the second gas flow guiding surface 42 , and the shielding gas from the shielding gas channel 14 will reach the welding hole 12 after passing through the gas flow area.

[0068] In order to guide the flow direction of the protective gas, Figures 8 to 10 As shown, the support plate 2 is closely attached to the lower end surface of the adsorption plate 1 and is provided with an airflow guide block 23, which is convexly arranged in the gas flow area one by one, and has a guide surface for guiding the protective gas to flow downward toward the collecting plate.

[0069] In actual use, after the shielding gas reaches the gas flow area through the shielding gas channel 14, under the guidance of the guide surface of the airflow guide block 23, the shielding gas will flow toward the collecting plate below, so as to effectively protect the welding points.

[0070] Optionally, the shielding gas input hole 22 on the support plate 2 can be connected to any position of the main flow slot 141. As an implementation, the shielding gas input hole 22 can be configured as a through hole penetrating along the thickness direction of the support plate 2, and one end of the through hole is opened to connect to the main flow slot 141.

[0071] Optionally, the negative pressure gas channel 21 on the support plate 2 needs to realize the negative pressure treatment of the negative pressure adsorption hole by the negative pressure device, in order to facilitate processing, such as Figure 7 As shown, the negative pressure gas channel 21 can be set through the inside of the support plate 2 along the length direction or the width direction, and the negative pressure connection hole 211 for connecting the negative pressure gas channel to the negative pressure device can be set on the upper end surface of the support plate 2.

[0072] Optionally, in order to improve the sealing effect between the negative pressure adsorption hole 13 and the negative pressure gas channel 21 , a sealing gasket may be provided at the connection between the negative pressure adsorption hole 13 and the negative pressure gas channel 21 .

[0073] Specifically, if Figure 5 As shown, a countersunk hole is provided at one end of the negative pressure adsorption hole 13 on the adsorption plate 1 facing the negative pressure gas channel 21, and a sealing gasket can be set in the countersunk hole. At the same time, the sealing gasket abuts against the lower end surface of the support plate 2, thereby, the sealing gasket can form an effective seal at the connection between the negative pressure adsorption hole 13 and the negative pressure gas channel 21.

[0074] In addition, in order to achieve a tight fit between the adsorption plate 1 and the support plate 2, the adsorption plate 1 and the support plate 2 can be fixed together with the help of a bolt structure. For example, the adsorption plate 1 can be provided with a threaded hole, and the support plate 2 can be provided with a mounting hole corresponding to the position of the threaded hole. The adsorption plate 1 and the support plate 2 can be fixedly connected via bolts set in the mounting hole and the threaded hole.

[0075] As an implementation method, the threaded hole can be set through the thickness direction of the adsorption plate 1, and the mounting hole on the support plate 2 is constructed as a countersunk hole, and its position corresponds one-to-one with the threaded hole on the adsorption plate 1. The bolt passes through the countersunk hole of the support plate 2 and is threadedly connected with the threaded hole on the adsorption plate 1, thereby achieving a tight fit between the adsorption plate 1 and the support plate 2.

[0076] Therefore, the collector plate welding head in this embodiment has the following advantages:

[0077] The current collecting plate welding pressure head in the present embodiment includes a stacked adsorption plate and a support plate, the adsorption plate is provided with an attachment surface, the attachment surface is provided with negative pressure adsorption holes, and the negative pressure gas channel provided inside the support plate can be connected with the negative pressure adsorption holes. When the current collecting plate is placed on the attachment surface in the adsorption plate, the negative pressure adsorption holes can adsorb and fix the current collecting plate. The adsorption plate is also provided with a protective gas channel, and the protective gas channel is connected to the welding hole, so that the protective gas can be delivered to the welding hole. The current collecting plate welding pressure head in the present embodiment integrates the negative pressure adsorption channel and the protective gas delivery channel into one by stacking the adsorption plate and the support plate. The overall structure is simple, the manufacturing is convenient, and the space occupied is small.

[0078] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A collector plate welding head, characterized in that: include: The adsorption plate and the support plate are stacked and closely arranged, wherein: The adsorption plate is provided with an attachment surface for attaching the current collecting plate and a welding hole penetrating toward the attachment surface, the attachment surface is provided with a negative pressure adsorption hole, and a protective gas channel is provided in the adsorption plate, and the protective gas channel is connected to the welding hole; The support plate is fixedly connected to the opposite surface of the adsorption plate facing away from the attachment surface. A negative pressure gas channel is arranged in the support plate, and the negative pressure gas channel is connected to the negative pressure adsorption hole of the adsorption plate. A protective gas input hole is also arranged in the support plate, and the protective gas input hole is connected to the protective gas channel.

2. The collector plate welding head according to claim 1, characterized in that: The protective gas channel is arranged on the end surface of the adsorption plate facing the support plate, and the support plate is closely attached to the end surface of the adsorption plate to close the protective gas channel.

3. The collector plate welding head according to claim 1, characterized in that: There are multiple welding holes, and each welding hole is connected to the protective gas channel.

4. The collector plate welding head according to claim 3, characterized in that: The number of the negative pressure adsorption holes is plural, and the plurality of welding holes are arranged at intervals between the plurality of negative pressure adsorption holes.

5. The collector plate welding head according to claim 3, characterized in that: The shielding gas channel includes a main flow groove and a plurality of branch flow grooves, the ends of the branch flow grooves are connected to the welding holes one by one, and the other ends are connected to the main flow groove, and the shielding gas input hole is connected to the main flow groove.

6. The collector plate welding head according to claim 1, characterized in that: The protective gas channel is provided with a first airflow guiding surface and a second airflow guiding surface near the welding hole, the first airflow guiding surface and the second airflow guiding surface are arranged opposite to each other, and the distance between the first airflow guiding surface and the second airflow guiding surface gradually increases in the flow direction of the protective gas.

7. The collector plate welding head according to claim 6, characterized in that: A gas circulation area is formed between the first airflow guiding surface and the second airflow guiding surface. The support plate is provided with an airflow guiding block close to the end surface of the adsorption plate. The airflow guiding block is protruding in the gas circulation area. The airflow guiding block has a guiding surface for guiding the protective gas to flow downward toward the collecting plate.

8. The collector plate welding head according to claim 1, characterized in that: The protective gas channels are arranged on two opposite sides of the attachment surface.

9. The collector plate welding head according to claim 1, characterized in that: A sealing gasket is provided at the connection between the negative pressure adsorption hole and the negative pressure gas channel.

10. The current collecting plate welding head according to claim 1, characterized in that: The adsorption plate is provided with a threaded hole, and the support plate is provided with a mounting hole corresponding to the position of the threaded hole. The adsorption plate and the support plate are fixedly connected via bolts arranged in the mounting hole and the threaded hole.

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