Laser welding copper nozzle tool, busbar tool and battery processing system

Abstract

The utility model relates to the technical field of battery processing, in particular to a laser welding copper nozzle tool, a busbar tool and a battery processing system.The laser welding copper nozzle tool comprises a base, a copper nozzle and a dust removal part, the copper nozzle is arranged on the base, and a hollow channel penetrating through the copper nozzle in the axial direction is arranged in the copper nozzle; a through hole communicated with the hollow channel is formed in the side wall of the copper nozzle; the dust removal part is arranged on the side, close to the copper nozzle, of the base, a dust removal opening is formed in one end of the dust removal part, a dust removal channel is formed in the dust removal part, and the dust removal opening communicates with the through hole through the dust removal channel. The dust removal part of the laser welding copper nozzle tool is closer to a welding seam, so that the requirement for negative pressure is lower when the same dust removal effect is achieved, and the negative pressure dust removal effect is not affected by the height of the base. Meanwhile, the dust removal opening is close to the surface of the welding seam, plasma generated on the surface of a workpiece in the welding process can be removed, light-blocking insufficient welding caused by the plasma and smoke dust is effectively avoided, and the excellent appearance of the welding seam is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a laser welding copper nozzle tool, a busbar tool and a battery processing system. Background Art

[0002] With the booming development of the power battery market, laser welding is increasingly used in the manufacturing process of batteries and battery packs. The dust removal function of the copper nozzle plays a decisive role in the quality of busbar welding. The busbar welding copper nozzle tooling has a certain confined space. During the welding process, plasma and smoke will be generated on the surface of the workpiece, which will cause light blocking and false welding; improper shielding gas angle and flow rate will lead to poor weld morphology, and welding defects such as spatter and pores cannot be controlled. Therefore, the dust removal and shielding gas of the copper nozzle must be well controlled and the consistency of each pressing process can be guaranteed to ensure the welding quality.

[0003] The existing bus copper nozzle tooling all removes dust from the back side of the tooling. The dust removal effect is affected by the tooling base and the copper nozzle height, which often causes insufficient negative pressure and leads to the phenomenon of smoke blocking the light. In addition, the dust removal cannot affect the plasma on the weld surface, so that plasma and smoke will be generated on the workpiece surface during the welding process, causing light blocking and false welding. Utility Model Content

[0004] The utility model provides a laser welding copper nozzle tool, a busbar tool and a battery processing system, which are used to solve the problem that in the prior art, the busbar copper nozzle tool is dusted from the rear side of the tool, and the dust removal effect is affected by the tool base and the height of the copper nozzle, which often causes insufficient negative pressure and leads to smoke blocking the light and false welding.

[0005] On the one hand, the utility model provides a laser welding copper nozzle tool, comprising:

[0006] Base;

[0007] The copper nozzle is arranged on the base, and a hollow passage is arranged inside the copper nozzle along the axial direction, and a through hole communicating with the hollow passage is opened on the side wall of the copper nozzle;

[0008] The dust removal part is arranged on one side of the base close to the copper mouth, a dust removal port is opened at one end of the dust removal part, a dust removal channel is arranged in the dust removal part, and the dust removal port is communicated with the through hole through the dust removal channel.

[0009] In some of the embodiments, the dust removal portion is nested in the outer wall of the copper nozzle.

[0010] In some embodiments, the dust removal unit includes:

[0011] A first dust removal section is arranged along the axial direction of the copper nozzle, a first dust removal channel is formed between the inner wall of the first dust removal section and the outer wall of the copper nozzle, and the first dust removal channel is connected to the through hole;

[0012] The second dust removal section is connected to the first dust removal section and is provided with a second dust removal channel. One end of the second dust removal channel is connected to the first dust removal channel, and the other end is connected to the dust removal port.

[0013] In some embodiments, the diameter of the through hole is between 5 mm and 7 mm.

[0014] In some embodiments, the copper nozzle includes a first copper nozzle and a second copper nozzle, the second copper nozzle is sleeved outside the first copper nozzle, and a gap is formed between the outer wall of the first copper nozzle and the inner wall of the second copper nozzle, and the gap is between 0.8mm-1.2mm.

[0015] In some embodiments, an end of the first copper nozzle and an end of the second copper nozzle form a height difference along the axial direction, and the height difference is between 5 mm and 8 mm.

[0016] In some of these embodiments, the through hole comprises:

[0017] A first through hole is formed on the first copper nozzle;

[0018] The second through hole is formed on the second copper nozzle and is coaxially arranged with the first through hole.

[0019] In some embodiments, a first air inlet and a second air inlet are formed on the side wall of the second copper nozzle, a third air inlet is formed on the side wall of the first copper nozzle, the first air inlet is connected to the gap, and the second air inlet is connected to the third air inlet.

[0020] On the other hand, the utility model also provides a busbar tooling, including the laser welding copper nozzle tooling provided by any of the above-mentioned specific embodiments.

[0021] On the other hand, the utility model also provides a battery processing system, including the laser welding copper nozzle tooling provided by any of the above-mentioned specific embodiments.

[0022] The beneficial effects of the utility model are as follows:

[0023] The utility model discloses a laser welding copper nozzle fixture, wherein the copper nozzle is arranged on a base, and a hollow passage is arranged in the copper nozzle which penetrates the copper nozzle axially, and a through hole which is connected to the hollow passage is opened on the side wall of the copper nozzle. By arranging a dust removal part on the side of the base close to the copper nozzle, and opening a dust removal port in the dust removal part, the dust removal port is connected to the dust removal part through the through hole on the side wall of the copper nozzle. Compared with the existing busbar copper nozzle fixture, the dust removal part in the laser welding copper nozzle fixture is closer to the weld, so the negative pressure requirement is lower to achieve the same dust removal effect, and the negative pressure dust removal effect is not affected by the height of the base. At the same time, the dust removal port is close to the weld surface, so the plasma generated on the workpiece surface during welding can be removed, effectively avoiding the light blocking and false welding caused by plasma and smoke, and ensuring the excellent weld morphology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a front view of the laser welding copper nozzle tooling of the embodiment of the utility model;

[0026] Figure 2 A side view of a laser welding copper nozzle tooling according to an embodiment of the utility model;

[0027] Figure 3 for Figure 2 A cross-sectional view of

[0028] Figure 4 The bottom view of the laser welding copper nozzle tooling according to the embodiment of the utility model.

[0029] Reference numerals:

[0030] 100-base, 200-copper nozzle, 210-first copper nozzle, 220-second copper nozzle, 230-hollow channel, 240-through hole, 241-first through hole, 242-second through hole, 300-dust removal part, 310-first dust removal section, 320-second dust removal section, 330-dust removal port, 340-dust removal channel, 341-first dust removal channel, 342-second dust removal channel, 410-first air inlet, 420-second air inlet, 430-third air inlet. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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] As shown in the background technology, the existing bus copper nozzle tooling all removes dust from the back side of the tooling. The dust removal effect is affected by the tooling base and the copper nozzle height, which often causes insufficient negative pressure and leads to the phenomenon of smoke blocking the light. In addition, the dust removal cannot affect the plasma on the weld surface, so that plasma and smoke will be generated on the workpiece surface during welding, causing light blocking and false welding.

[0033] In order to improve the above problems, this embodiment provides a laser welding copper nozzle tooling, such as Figure 1-4As shown, it includes a base 100, a copper nozzle 200 and a dust removal part 300. The copper nozzle 200 is arranged on the base 100. A hollow passage 230 is provided in the copper nozzle 200 and runs through the copper nozzle in the axial direction. A through hole 240 communicating with the hollow passage 230 is provided on the side wall of the copper nozzle 200. The dust removal part 300 is arranged on a side of the base 100 close to the copper nozzle. A dust removal port 330 is provided in the dust removal part 300. A dust removal channel 340 is provided in the dust removal part 300. The dust removal port 330 is communicated with the through hole 240 through the dust removal channel 340.

[0034] Specifically, the base 100 is provided with an avoidance hole, and the copper nozzle 200 is installed on one side of the base 100 at a position corresponding to the avoidance hole. One end of the copper nozzle is fixed to the base 100 by bolts, and the other end of the copper nozzle is an open end. A hollow channel 230 is provided in the copper nozzle 200, which runs through the copper nozzle axially. The hollow channel 230 is coaxially arranged with the avoidance hole to meet the requirements of laser welding working conditions. A through hole 240 connected to the hollow channel 230 is provided on the side wall of the copper nozzle. The dust removal part 300 is installed on the upper end of the copper nozzle. The dust removal port 330 is provided at the top of the dust removal part 300 for connecting with the negative pressure equipment. The dust removal port 330 is connected with the through hole 240 through the dust removal part 300, and can lead out the smoke and plasma generated in the hollow channel 230 during the welding process.

[0035] like Figure 3 As shown, the dust removal section 300 is provided with a dust removal channel 340, and the dust removal port 330 is connected with the through hole 240 through the dust removal channel 340. The dust removal channel 340 can be an external pipeline or a pipeline formed by the structure itself. By providing the dust removal channel 340 in the dust removal section 300, the dust removal channel 340 can be integrated into the dust removal section 300, keeping the appearance of the copper nozzle tooling neat and tidy, and avoiding interference of redundant structures with the module bus.

[0036] By using the technical solution of this embodiment, the dust removal part 300 is arranged on the side of the base 100 close to the copper nozzle 200, one end of the dust removal part 300 is connected to the through hole 240 of the side wall of the copper nozzle 200, and the other end is provided with a dust removal port 330, so that the dust removal port 330 and the through hole 240 are connected to each other. The dust removal port 330 can be connected to the negative pressure device. After the negative pressure device is turned on, the negative pressure passes through the dust removal port 330 and the through hole to extract the plasma and smoke generated during the welding process in the copper nozzle. Compared with the existing busbar copper nozzle tooling, the dust removal part 300 in this laser welding copper nozzle tooling is closer to the weld, so the negative pressure requirement for achieving the same dust removal effect is lower, and the negative pressure dust removal effect is not affected by the height of the base. At the same time, the dust removal port 330 is close to the weld surface, which can remove the plasma generated on the workpiece surface during welding, effectively avoiding the light blocking and false welding caused by plasma and smoke, and ensuring the excellent weld morphology.

[0037] In some of the embodiments, the dust removal part 300 is nested in the outer wall of the copper nozzle 200, so that the copper nozzle 200 and the dust removal part 300 are fixed to each other, which is beneficial to increase the reliability of the tooling and avoid interference with the module bus.

[0038] In some embodiments, such as Figure 2 , Figure 3 As shown, the dust removal section 300 includes a first dust removal section 310 and a second dust removal section 320. The first dust removal section 310 is arranged along the axial direction of the copper nozzle. A first dust removal channel 341 is formed between the inner wall of the first dust removal section 310 and the outer wall of the copper nozzle. The first dust removal channel 341 is connected to the through hole 240. The second dust removal section 320 is connected to the first dust removal section 310, and a second dust removal channel 342 is arranged inside. One end of the second dust removal channel 342 is connected to the first dust removal channel 341, and the other end is connected to the dust removal port 330. The first dust removal channel 341 and the second dust removal channel 342 together form a complete dust removal channel 340.

[0039] Specifically, the copper nozzle 200 has a rectangular cross section, the first dust removal section 310 is nested in the upper end of the copper nozzle 200, the end of the first dust removal section 310 abuts against the upper end surface of the copper nozzle 200 to form a sealing surface, a groove is provided in the first dust removal section 310, the groove is arranged opposite to the through hole, and a first dust removal channel 341 connected to the through hole 240 is formed between the bottom of the groove and the upper end surface of the copper nozzle 200. The second dust removal section 320 is integrally formed with the first dust removal section 310, and a second dust removal channel 342 is provided in the second dust removal section 320, the lower end of the second dust removal channel 342 is connected to the first dust removal channel 341, and the upper end of the second dust removal channel 342 is connected to the dust removal port 330.

[0040] By using the technical solution of this embodiment, by arranging the first dust removal section 310 and the second dust removal section 320 outside the copper nozzle 200, the dust removal channel is formed by using the structure of the first dust removal section 310 and the second dust removal section 320, and the through hole 240 on the side wall of the copper nozzle 200 can be connected with the dust removal port 330, and the structure is stable. After the dust removal port 330 is connected with the negative pressure device, the smoke and plasma generated in the hollow channel 230 during the welding process can be led out.

[0041] In some of the embodiments, the diameter of the through hole 240 is between 5 mm and 7 mm. In the present embodiment, the diameter of the through hole is preferably 6 mm, which can reduce the width of the copper nozzle as much as possible while ensuring the dust removal flow rate.

[0042] In some embodiments, such as Figure 1-3As shown, the copper nozzle 200 includes a first copper nozzle 210 and a second copper nozzle 220, and the second copper nozzle 220 is sleeved outside the first copper nozzle 210, and a gap is formed between the outer wall of the first copper nozzle 210 and the inner wall of the second copper nozzle 220, and the gap is between 0.8mm-1.2mm. In this embodiment, the gap is preferably 0.9mm. The end of the first copper nozzle 210 and the end of the second copper nozzle 220 form a height difference along the axial direction, and the height difference is between 5mm-8mm. In this embodiment, the height difference is preferably 8mm. A larger gap and height difference can reduce the initial speed of the shielding gas and increase the coverage, thereby further improving the welding effect.

[0043] In some embodiments, the through hole 240 includes a first through hole 241 and a second through hole 242, wherein the first through hole 241 is provided on the first copper nozzle 210. The second through hole 242 is provided on the second copper nozzle 220 and is coaxially arranged with the first through hole 241, so as to lead out smoke and plasma in the hollow channel 230 in the first copper nozzle 210.

[0044] In some embodiments, the side wall of the second copper nozzle 220 is provided with a first air inlet 410 and a second air inlet 420, and the side wall of the first copper nozzle 210 is provided with a third air inlet 430. The inner end of the first air inlet is connected to the gap, and the outer end of the first air inlet 410 can be connected to the protective gas pipe for supplying protective gas into the first copper nozzle 210. The protective gas coming out of the gap is dispersed along the inner wall of the second copper nozzle 220 to ensure that the protective gas can evenly cover the welding surface. The second air inlet 420 is coaxially connected to the third air inlet 430, and is used to inhale air from the second air inlet 420 and the third air inlet 430 during negative pressure dust removal. In this way, the flow path of the protective gas is consistent with the negative pressure flow path of the dust removal air, which can ensure that the gas and impurities blown out by the protective gas can be quickly sucked out from the dust removal port 330 under the action of negative pressure.

[0045] Based on the same general utility model concept, the utility model also provides a busbar tool, including the laser welding copper nozzle tool provided by any of the above-mentioned specific embodiments.

[0046] Based on the same general utility model concept, the utility model also provides a battery processing system, including the laser welding copper nozzle tooling provided by any of the above-mentioned specific embodiments.

[0047] Combined with the above structure, the laser welding copper nozzle tooling of this embodiment has the following advantages:

[0048] 1. Compared with the existing busbar copper nozzle tooling, the laser welding copper nozzle tooling of this embodiment has lower requirements for negative pressure and is not affected by the base height; the dust removal port 330 is close to the weld surface and can remove plasma.

[0049] 2. Compared with the existing busbar copper nozzle tooling, the first air inlet 410, the second air inlet 420, the third air inlet 430 of the protective gas of the laser welding copper nozzle tooling of this embodiment and the dust removal port 330 form a complete air duct, which is conducive to accelerating the discharge of dust.

[0050] 3. Compared with the existing busbar copper nozzle tooling, the overall size of the copper nozzle of the laser welding copper nozzle tooling of this embodiment is reduced, and the upper and lower lengths are narrowed, which is conducive to adapting to different welding conditions.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A laser welding copper nozzle tool, characterized in that: include: Base; A copper nozzle is arranged on the base, and is provided with a hollow passage axially penetrating the copper nozzle, and a through hole communicating with the hollow passage is opened on a side wall of the copper nozzle; The dust removal part is arranged on one side of the base close to the copper mouth, a dust removal port is opened at one end of the dust removal part, a dust removal channel is arranged in the dust removal part, and the dust removal port is connected with the through hole through the dust removal channel.

2. The laser welding copper nozzle tooling according to claim 1 is characterized in that: The dust removal part is nested in the outer wall of the copper nozzle.

3. The laser welding copper nozzle tooling according to claim 2 is characterized in that: The dust removal unit comprises: A first dust removal section is arranged along the axial direction of the copper nozzle, a first dust removal channel is formed between the inner wall of the first dust removal section and the outer wall of the copper nozzle, and the first dust removal channel is connected to the through hole; The second dust removal section is connected to the first dust removal section and is provided with a second dust removal channel. One end of the second dust removal channel is connected to the first dust removal channel, and the other end is connected to the dust removal port.

4. The laser welding copper nozzle tooling according to claim 1 is characterized in that: The diameter of the through hole is between 5 mm and 7 mm.

5. The laser welding copper nozzle tooling according to any one of claims 1 to 4, characterized in that: The copper nozzle comprises a first copper nozzle and a second copper nozzle, wherein the second copper nozzle is sleeved on the outside of the first copper nozzle, and a gap is formed between the outer wall of the first copper nozzle and the inner wall of the second copper nozzle, wherein the gap is between 0.8 mm and 1.2 mm.

6. The laser welding copper nozzle tooling according to claim 5 is characterized in that: An end portion of the first copper nozzle and an end portion of the second copper nozzle form a height difference along the axial direction, and the height difference is between 5 mm and 8 mm.

7. The laser welding copper nozzle tooling according to claim 6 is characterized in that: The through hole comprises: A first through hole is formed on the first copper nozzle; The second through hole is formed on the second copper nozzle and is coaxially arranged with the first through hole.

8. The laser welding copper nozzle tooling according to claim 7 is characterized in that: The second copper nozzle side wall is provided with a first air inlet and a second air inlet, the first copper nozzle side wall is provided with a third air inlet, the first air inlet is communicated with the gap, and the second air inlet is communicated with the third air inlet.

9. A busbar tool, characterized in that: The invention comprises the laser welding copper nozzle tooling as described in any one of claims 1 to 8.

10. A battery processing system, characterized in that: The invention comprises the laser welding copper nozzle tooling as described in any one of claims 1 to 8.

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