Welding tool and welding equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a welding tool and welding device.The welding tool comprises a base plate, a copper nozzle and a cover plate, and a welding hole is formed in the base plate; the copper nozzle is arranged on the base plate, a welding cavity is formed in the copper nozzle, the copper nozzle is provided with a first end and a second end which are communicated with the welding cavity, the first end is communicated with the welding hole, the second end is used for abutting against a to-be-welded part, and a slag discharging opening is formed in the position, close to the second end, of the copper nozzle; the cover plate is arranged at the position, corresponding to the welding hole, of the substrate, and a laser hole and an air inlet are formed in the cover plate. When the welding tool is used for welding the module nickel sheet, the situation of welding slag splashing in the welding process can be effectively improved, the situation that the splashing welding slag shields laser to affect the welding quality is avoided, welding omission and insufficient welding are avoided, meanwhile, the welding slag can be guided out in the welding process, no welding slag residues exist in a to-be-welded piece, and therefore the product quality of the to-be-welded piece is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a welding tooling and a welding device. Background Art

[0002] With the development of society, the demand for electric vehicles is also increasing continuously, and people's attention to lithium-ion batteries in electric vehicles is getting higher and higher. During the process of assembling the battery into a battery module pack, it is necessary to weld the module nickel sheets. The existing production methods and efficiency of nickel sheet welding mechanisms have been difficult to meet the requirements of modern production and product quality.

[0003] The existing methods for welding module nickel sheets mainly include the following two: 1. The device is set as a double-layer copper nozzle mechanism, and a protective gas is blown in during the welding process. After welding is completed, the dust extraction mechanism is responsible for sucking away the excess welding slag; 2. The device is set as a single-layer copper nozzle mechanism, and a protective gas is introduced while welding. After the module welding is completed, the welding copper nozzle needs to be removed from the welding station, and the dust extraction mechanism extracts the welding slag after welding from the welding station; The above two methods have low equipment efficiency and are difficult to meet the requirements of modern production. The most important thing is that the welding slag cannot be completely extracted, resulting in welding slag residue or welding slag splashing onto the module or fixture, causing blue film damage or missed welding and false welding of the module. Utility Model Content

[0004] This application provides a welding tooling and a welding device to solve the problem in the prior art that the welding slag during the welding process of module nickel sheets cannot be completely extracted, resulting in welding slag residue or welding slag splashing onto the module or fixture, causing blue film damage or missed welding and false welding of the module.

[0005] On the one hand, this application provides a welding tooling, including:

[0006] A substrate, on which a welding hole is provided;

[0007] A copper nozzle, arranged on the substrate, with a welding cavity formed inside the copper nozzle. The copper nozzle has a first end and a second end communicating with the welding cavity. The first end is connected to the welding hole, and the second end is used to abut against the workpiece to be welded. A slag discharge port is provided at a position of the copper nozzle close to the second end;

[0008] A cover plate, arranged on the substrate corresponding to the welding hole, and a laser hole and an air inlet are provided on the cover plate.

[0009] In a possible design, the tooling further includes an exhaust nozzle, the inner cavity of the exhaust nozzle is communicated with the slag discharge port, and the exhaust nozzle is inclined towards the second end.

[0010] In a possible design, the tooling further includes a vision camera, and the vision camera is used to measure the distance between the workpiece to be welded and the second end.

[0011] In a possible design, the cover plate has a first position and a second position. The cover plate covers the welding hole by moving to the first position; and avoids the welding hole by moving to the second position.

[0012] In a possible design, the tooling further includes a first driving member, which is connected to the cover plate and is used to drive the cover plate to move between a first position and a second position along a first direction, where the first direction is a length direction of the substrate.

[0013] In a possible design, the tooling further includes a dust extraction duct, which is disposed on the substrate and is connected to the welding hole.

[0014] In a possible design, the tooling also includes a moving seat and a second driving member, the second driving member and the substrate are respectively arranged on the moving seat, the second driving member is connected to the substrate, and is used to drive the substrate to move along a second direction, and the second direction is the height direction of the substrate.

[0015] In a possible design, the tooling also includes a fixed seat and a third driving member. The third driving member and the movable seat are respectively arranged on the fixed seat. The third driving member is connected to the movable seat and is used to drive the movable seat to move along a third direction, which is the width direction of the substrate.

[0016] In a possible design, the tooling also includes a base and a supporting platform. The supporting platform and the fixing seat are respectively arranged on the base, and the supporting platform is used to support the workpiece to be welded.

[0017] On the other hand, the present application also provides a welding device, including the welding tool as described above.

[0018] The beneficial effects of this application are as follows:

[0019] The welding tooling of the present application includes a base plate, a copper nozzle, and a cover plate. By opening a welding hole in the base plate, the first end of the copper nozzle is communicated with the welding hole, and the second end of the copper nozzle abuts against the workpiece to be welded, so that the workpiece to be welded can be pressed against the second end of the copper nozzle to achieve welding; by opening a slag discharge port at a position near the second end of the copper nozzle and arranging a laser hole and an air inlet on the cover plate, before welding the workpiece to be welded, the protective gas enters the welding cavity from the air inlet hole and drives the air remaining in the welding cavity out from the slag discharge port, thereby improving the purity of the protective gas in the welding cavity and avoiding oxidation on the surface of the workpiece to be welded during welding; when welding the workpiece to be welded, the laser can pass through the laser hole to realize welding of the workpiece to be welded. At the same time, the welding slag near the second end of the copper nozzle can be discharged from the slag discharge port along with the protective gas under the blowing of the protective gas, thereby effectively improving the situation of welding slag splashing, avoiding the splashed welding slag from blocking the laser and affecting the welding quality, avoiding missed welding and false welding, and at the same time minimizing the welding slag falling on the workpiece to be welded; when the welding of the welded part is completed, high-pressure air enters the welding cavity from the air inlet hole to blow the welding slag falling on the workpiece to be welded and the inner wall of the welding cavity, thereby further ensuring that there is no welding slag residue on the workpiece to be welded and the inner wall of the welding cavity. On the one hand, no welding slag residue on the inner wall of the welding cavity is beneficial to providing a clean welding environment for the next workpiece to be welded. On the other hand, no welding slag residue on the workpiece to be welded itself can improve the product quality of the workpiece to be welded itself.

[0020] When using the tooling in the present application to weld the module nickel sheet, after the module welding is completed and moved to the next working station, there is basically no welding slag on the surface of the module, so the welding slag will not adhere to the blue film due to the vibration of the module transfer or the high temperature during the charge and discharge of the module, thereby avoiding the welding slag piercing the blue film during the charge and discharge of the product, effectively preventing the short circuit of the battery core, meeting the production process requirements and improving the product quality at the same time.

[0021] The welding equipment provided by the present application includes all the above advantages of the welding tooling because it includes the welding tooling in the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the welding tooling provided by the embodiment of the present application;

[0024] Figure 2 It is another schematic structural diagram of the welding tooling provided by the embodiment of the present application;

[0025] Figure 3 Another structural schematic diagram of the welding tooling provided by the embodiment of the present application;

[0026] Figure 4 Another structural schematic diagram of the welding tooling provided by the embodiment of the present application.

[0027] Reference numerals:

[0028] 100, substrate; 110, welding hole; 200, copper nozzle; 210, first end; 220, second end; 230, slag discharge port; 300, exhaust air nozzle; 400, cover plate; 410, laser hole; 420, air inlet; 500, dust extraction pipeline; 610, first driving member; 620, second driving member; 630, third driving member; 710, base; 720, fixed seat; 730, moving seat; 800, support platform. Detailed implementation manners

[0029] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] Next, in conjunction with Figures 1-4 , the welding tooling provided in the embodiment of the present application will be described.

[0031] Referring to Figure 1 As shown, in the embodiment provided by the present application, the welding tooling includes a substrate 100, a copper nozzle 200, and a cover plate 400. A welding hole 110 is formed on the substrate 100; the copper nozzle 200 is arranged on the substrate 100, a welding cavity is formed inside the copper nozzle 200, the copper nozzle 200 has a first end 210 and a second end 220 communicating with the welding cavity, the first end 210 is connected to the welding hole 110, the second end 220 is used to abut against the workpiece to be welded, and a slag discharge port 230 is formed at a position of the copper nozzle 200 close to the second end 220; the cover plate 400 is arranged on the substrate 100 corresponding to the welding hole 110, and a laser hole 410 and an air inlet 420 are formed on the cover plate 400. Specifically, the cover plate 400 is installed at the upper end of the substrate 100 corresponding to the welding hole 110, the copper nozzle 200 is installed at the lower end of the substrate 100 corresponding to the welding hole 110, the upper end of the copper nozzle 200 is the first end 210, and the lower end of the copper nozzle 200 is the second end 220; in some specific embodiments, the laser hole 410 is formed at the center position of the cover plate 400, and the air inlet holes are symmetrically distributed around the laser hole 410. For example, there are two air inlet holes, and the two air inlet holes are symmetrically arranged with respect to the laser hole 410, which is beneficial to uniformly introduce the protective gas into the welding cavity of the copper nozzle 200.

[0032] Using the technical solution of the above embodiment of the present application, by opening a slag discharge port 230 at a position of the copper nozzle 200 near the second end 220 and opening an air inlet 420 on the cover plate 400, before welding, the shielding gas (such as nitrogen) can enter from the air inlet 420 and, under the action of its own gravity, squeeze the air in the welding hole 110 and the welding cavity downward, so that the air is driven out from the lower slag discharge port 230, thereby improving the purity of the shielding gas in the welding cavity and avoiding oxidation on the surface of the workpiece to be welded during welding; during the welding process, the welding slag in the copper nozzle 200 can be orderly discharged from the slag discharge port 230 along with the shielding gas under the blowing of the shielding gas, which can effectively avoid welding slag splashing and welding slag falling on the workpiece to be welded, thereby avoiding the splashed welding slag from blocking the laser and avoiding missed welding and false welding, and improving the welding quality; after the welding is completed, high-pressure air can enter the welding cavity from the air inlet hole to thoroughly blow the small amount of welding slag falling on the workpiece to be welded and the inner wall of the welding cavity, thereby further ensuring that there is no welding slag residue on the workpiece to be welded and the inner wall of the welding cavity, improving the product quality of the workpiece to be welded itself and providing a clean welding environment for the next workpiece to be welded. Using the tooling welding module nickel sheet in the embodiment of the present application can ensure that there is basically no welding slag on the surface of the welded module, and it will not cause welding slag to adhere to the blue film due to the vibration during the transfer of the module to the next station or the high temperature during the charge and discharge of the module, thereby avoiding the welding slag from piercing the blue film during the charge and discharge of the product, effectively preventing the short circuit of the battery core, meeting the production process requirements and improving the product quality.

[0033] Referring to Figure 2 As shown, in some embodiments of the present application, the tooling further includes an exhaust nozzle 300. The inner cavity of the exhaust nozzle 300 is communicated with the slag discharge port 230, and the exhaust nozzle 300 is inclined towards the second end 220. Specifically, the gas flows along the central axis of the exhaust nozzle 300 in the inner cavity of the exhaust nozzle 300. The central axis of the exhaust nozzle 300 forms a certain angle with the width direction of the copper nozzle 200. For example, the central axis of the exhaust nozzle 300 forms an angle of 30° with the width direction of the copper nozzle 200, so that the exhaust nozzle 300 is inclined downward, so that it can face the second end 220 of the copper nozzle 200 (i.e., the lower end of the copper nozzle 200). It should be noted that since the workpiece to be welded is located at the lower end of the copper nozzle 200, the welding slag is mainly concentrated at the lower end of the copper nozzle 200. By making the exhaust nozzle 300 inclined towards the second end 220, it is convenient for the welding slag to be discharged from the exhaust nozzle 300 under the drive of the gas; at the same time, since the exhaust nozzle 300 is inclined towards the second end 220, the discharge path of the welding slag can successfully avoid the position of the welding cavity directly opposite to the laser hole 410, thereby reducing the interference of the welding slag on the laser (blocking the laser and affecting the welding power), avoiding missed welding and false welding, and improving the welding quality.

[0034] Referring to Figure 3As shown, in some embodiments of the present application, the tooling further includes a base 710 and a support platform 800. The support platform 800 is disposed on the base 710 and is used to support the workpiece to be welded. The workpiece to be welded module is transported to the support platform 800 by the previous process conveying mechanism and waits for welding. In some embodiments of the present application, the tooling further includes a vision camera, which is used to measure the distance between the workpiece to be welded on the support platform 800 and the second end 220. Specifically, the vision camera is disposed on the welding robot. After the workpiece to be welded module is transported to the support platform 800 by the previous process conveying mechanism, the welding robot moves to the welding station, and the position of the workpiece to be welded is measured by the vision camera, so that the substrate 100 is moved according to the measurement result to press the lower end of the copper nozzle 200 against the workpiece to be welded.

[0035] Referring to Figure 1 As shown, in some embodiments of the present application, the cover plate 400 has a first position and a second position. The cover plate 400 covers the welding hole 110 by moving to the first position; the cover plate 400 avoids the welding hole 110 by moving to the second position. In this way, by moving the cover plate 400 to the second position, the light source of the vision camera is prevented from being blocked so that the vision camera can smoothly measure the distance between the workpiece to be welded and the second end 220. Until the entire welding process after the vision camera measurement is completed, the cover plate 400 is in the first position, so that the welding hole 110 can be covered, effectively improving the coverage range of the shielding gas and providing a welding environment with high-purity shielding gas for the welding hole 110 and the welding cavity.

[0036] In some specific embodiments, the cover plate 400 is connected to a first driving member 610. The first driving member 610 is used to drive the cover plate 400 to move between the first position and the second position along a first direction, and the first direction is the length direction of the substrate 100. Specifically, the first driving member 610 can be a servo motor, an electric push rod, a cylinder or a hydraulic cylinder. The output shaft of the first driving member 610 is along the length direction of the substrate 100. One side of the cover plate 400 close to the first driving member 610 has a connecting plate, and the connecting plate is connected to the first driving member 610. Thus, the output shaft of the first driving member 610 can drive the cover plate 400 to move along the length direction of the substrate 100, so that the cover plate 400 covers or avoids the welding hole 110.

[0037] Referring to Figure 3 、 Figure 4As shown, in some embodiments of the present application, the tooling further includes a fixed seat 720, a moving seat 730, a second driving member 620, and a third driving member 630. Among them, the fixed seat 720 is fixedly installed on the base 710 by bolts, the moving seat 730 is slidably installed on the fixed seat 720 through a guide rail, and the substrate 100 is slidably installed on the moving seat 730 through a guide rail. Specifically, the third driving member 630 can be a servo motor, an electric push rod, a cylinder, or a hydraulic cylinder. The third driving member 630 is connected to the moving seat 730, and the output shaft of the third driving member 630 is along the width direction of the substrate 100. The output shaft of the third driving member 630 can drive the moving seat 730 to move along the width direction of the substrate 100, so that the moving seat 730 and the substrate 100 move synchronously in the left-right direction; the second driving member 620 can be a servo motor, an electric push rod, a cylinder, or a hydraulic cylinder. The second driving member 620 is connected to the substrate 100, and the output shaft of the second driving member 620 is along the height direction of the substrate 100. The output shaft of the second driving member 620 can drive the substrate 100 to move along the height direction of the substrate 100, so that the substrate 100 moves in the up-down direction. In this way, the left-right movement and up-down movement of the substrate 100 can be realized. The second driving member 620 and the third driving member 630 move the substrate 100 according to the measurement results of the vision camera, so that the lower end of the copper nozzle 200 presses the workpiece to be welded before welding, and thus it can be applicable to the welding of various workpieces to be welded (nickel sheets of various sizes of battery cells).

[0038] Referring to Figure 1 As shown, in some embodiments of the present application, the tooling further includes a dust extraction pipeline 500. The dust extraction pipeline 500 is arranged on the substrate 100 and is communicated with the welding hole 110. The dust extraction pipeline 500 is communicated with a negative pressure device. Under the action of negative pressure, the welding smoke, dust, and a small amount of welding slag generated during welding can be extracted from the dust extraction pipeline 500 during and after welding.

[0039] The working process of the welding tooling in the embodiments of the present application is as follows:

[0040] The workpiece to be welded (nickel sheet module) is conveyed from the upper station to the support platform 800;

[0041] The first driving member 610 drives the cover plate 400 to move to the second position to avoid the welding hole 110. The vision camera measures the distance between the workpiece to be welded and the second end 220. After measurement, the first driving member 610 drives the cover plate 400 to move to the first position to cover the welding hole 110;

[0042] The second driving member 620 and the third driving member 630 move the substrate 100 according to the measurement results of the vision camera, so that the second end 220 of the copper nozzle 200 presses the workpiece to be welded;

[0043] Introduce shielding gas into the welding hole 110 and the welding cavity through the air inlet 420 for a certain period of time, so that the air in the welding hole 110 and the welding cavity is squeezed out from the slag discharge port 230;

[0044] Move the laser welding manipulator to the welding station and start welding;

[0045] During the welding process, continuously introduce shielding gas into the welding hole 110 and the welding cavity. The welding slag is blown by the shielding gas and orderly discharged from the slag discharge port 230 along with the shielding gas; at the same time, extract the fumes in the welding hole 110 and the welding cavity through the dust extraction pipeline 500;

[0046] After welding is completed, close the slag discharge port 230, and introduce high-pressure air into the welding hole 110 and the welding cavity through the air inlet 420 for a certain period of time. The residual welding slag is blown up by the impact force of the high-pressure air and is completely extracted from the dust extraction pipeline 500 together with the high-pressure air;

[0047] Reset the laser welding manipulator and reset the substrate 100.

[0048] An embodiment of the present application also provides a welding device, including the welding tooling of the above embodiment and also including a laser welding manipulator.

[0049] It should be noted that since the welding device includes the welding tooling, it also includes all the above advantages of the welding tooling, which will not be elaborated here.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A welding tool, characterized in that: include: A base plate, wherein a welding hole is formed on the base plate; A copper nozzle is arranged on the substrate, a welding cavity is formed inside the copper nozzle, the copper nozzle has a first end and a second end connected to the welding cavity, the first end is connected to the welding hole, the second end is used to abut against the workpiece to be welded, and a slag discharge port is opened at a position of the copper nozzle close to the second end; The cover plate is arranged on the substrate at a position corresponding to the welding hole, and the cover plate is provided with a laser hole and an air inlet.

2. The welding tool according to claim 1, characterized in that: It also includes an exhaust nozzle, the inner cavity of which is connected to the slag discharge port, and the exhaust nozzle is inclined toward the second end.

3. The welding tool according to claim 1 or 2, characterized in that: Also included is a visual camera, which is used to measure the distance between the workpiece to be welded and the second end.

4. The welding tool according to claim 3, characterized in that: The cover plate has a first position and a second position. The cover plate covers the welding hole by moving to the first position; and the cover plate avoids the welding hole by moving to the second position.

5. The welding tool according to claim 4, characterized in that: It also includes a first driving member, which is connected to the cover plate and is used to drive the cover plate to move between the first position and the second position along a first direction, where the first direction is the length direction of the substrate.

6. The welding tool according to claim 1, characterized in that: It also includes a dust extraction pipe, which is arranged on the substrate and is connected to the welding hole.

7. The welding tool according to claim 1, characterized in that: It also includes a moving seat and a second driving member, the second driving member and the substrate are respectively arranged on the moving seat, the second driving member is connected to the substrate, and is used to drive the substrate to move along a second direction, and the second direction is the height direction of the substrate.

8. The welding tool according to claim 7, characterized in that: It also includes a fixed seat and a third driving member, the third driving member and the movable seat are respectively arranged on the fixed seat, the third driving member is connected to the movable seat, and is used to drive the movable seat to move along a third direction, and the third direction is the width direction of the substrate.

9. The welding tool according to claim 8, characterized in that: It also includes a base and a supporting platform, wherein the supporting platform and the fixing seat are respectively arranged on the base, and the supporting platform is used for supporting the workpiece to be welded.

10. A welding device, characterized in that: The invention comprises the welding tool as described in any one of claims 1 to 9.

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