Coaxial dust collection and spiral shielding gas blowing device for welding pressure nozzle

Abstract

The invention relates to a welding pressing nozzle coaxial dust collection and spiral shielding gas blowing device which comprises a pressing plate, and a plurality of welding single pressing nozzle assemblies are installed on the pressing plate. The welding single-pressing-nozzle assembly comprises a spiral neck bush and a pressing nozzle, the top of the pressing nozzle is connected with a pressing plate above through a plurality of cantilever pins, a spiral ventilation cavity is formed between a neck bush groove and an inner cavity of the pressing nozzle, a connector is installed on a connector communicating cavity on one side of the top of the pressing nozzle, and the connector communicating cavity is communicated with the spiral ventilation cavity. The bottom of the pressing nozzle is a tail end welding seam area. According to the invention, pseudo soldering caused by non-uniform shielding gas blowing in square-shell battery module chip welding is solved, and the welding yield is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to battery module welding processing, and in particular to a welding nozzle coaxial dust suction and spiral protective gas blowing device. Background Art

[0002] During the processing of the square shell battery module, the battery tabs need to be welded to the square single battery.

[0003] After searching, it was found that the existing Chinese patent announcement number is CN222199428U, which discloses a lithium battery tab welding device and welding equipment, including a battery cell clamping mechanism, a tab positioning mechanism and a base, the battery cell clamping mechanism and the tab clamping mechanism can be detachably installed on the base; a tab mounting assembly is movably fixed on the tab positioning mechanism, a tab placement groove is provided on the tab mounting assembly, and a positioning assembly is provided on the tab placement groove, which solves the problem that when the existing manual tab welding is performed, the tab and the lithium battery are fixed manually, resulting in a high manual load.

[0004] At present, for the square shell battery module BUSBAR (battery bar) welding equipment, the main phenomenon is uneven blowing of the protective gas, which leads to cold welding and causes a large amount of welding slag to float on the surface of the product; at the same time, the welding slag is not effectively removed during welding, resulting in a worse welding environment.

[0005] In view of the above-mentioned defects, the designer actively carried out research and innovation in order to create a welding nozzle coaxial dust suction and spiral blowing protective gas device to make it more valuable for industrial use. Summary of the invention

[0006] In order to solve any of the above technical problems, the purpose of the present invention is to provide a welding nozzle coaxial dust suction and spiral protective gas blowing device.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] The welding nozzle coaxial dust suction and spiral protective gas blowing device comprises a pressing plate on which a plurality of welding single nozzle assemblies are mounted;

[0009] The welding single pressure nozzle assembly includes a spiral inner sleeve and a pressure nozzle. The top of the pressure nozzle is connected to the upper pressure plate through a plurality of cantilever pins. The spiral inner sleeve is embedded in the pressure nozzle inner cavity of the pressure nozzle. A sleeve inner cavity is opened on the inner side of the spiral inner sleeve. A plurality of spiral inner sleeve grooves are arranged on the outer side of the spiral inner sleeve. A spiral ventilation cavity is formed between the inner sleeve groove and the pressure nozzle inner cavity. A joint is installed on the joint connecting cavity on one side of the pressure nozzle top. The joint connecting cavity is connected with the spiral ventilation cavity. The bottom of the pressure nozzle is the end weld area.

[0010] As a further improvement of the present invention, a protective gas blowing device is installed on a pressure plate on one side of the welding single pressure nozzle assembly, and the protective gas blowing device is connected to the joint through a protective gas blowing connecting air pipe.

[0011] As a further improvement of the present invention, the protective gas blowing connecting air pipe is a connecting hose structure.

[0012] As a further improvement of the present invention, the joint connecting cavity is connected to a side of the spiral ventilation cavity close to the top.

[0013] As a further improvement of the present invention, a coaxial dust suction device is also installed on the pressure plate on one side of the welding single pressure nozzle assembly, and the coaxial dust suction device is connected to the spiral ventilation cavity through a coaxial dust suction connecting air pipe.

[0014] As a further improvement of the present invention, the coaxial dust suction connecting air pipe is a connecting hose structure.

[0015] As a further improvement of the present invention, the coaxial dust suction device is connected to a side of the spiral ventilation cavity close to the bottom.

[0016] As a further improvement of the present invention, the top of the cantilever pin is fixedly mounted on the pressure plate, the pressure nozzle can move up and down on the cantilever pin, and a rectangular spring is mounted on the cantilever pin above the pressure nozzle.

[0017] By means of the above scheme, the present invention has at least the following advantages:

[0018] The present invention solves the problem of cold welding caused by uneven blowing of protective gas in welding of square shell battery module tabs, thereby greatly improving the welding yield.

[0019] The present invention effectively isolates the secondary pollution of the product by using the dust extraction device during welding.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of a welding pressure nozzle coaxial dust suction and spiral type protective gas blowing device of the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the welding single pressure nozzle assembly;

[0024] Figure 3 yes Figure 2 Schematic diagram of the internal structure;

[0025] Figure 4 It is a schematic structural diagram of a square shell battery module to be processed according to the present invention.

[0026] The meanings of the various reference numerals in the figures are as follows.

[0027] Pressure plate 1, protective gas blowing device 2, coaxial dust suction device 3, welding single pressure nozzle assembly 4, rectangular spring 5, cantilever pin 6, spiral inner bushing 7, pressure nozzle 8, joint 9, bushing inner cavity 10, joint connecting cavity 11, spiral ventilation cavity 12, end weld area 13, square single battery 14, battery pole 15, battery bar 16. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiment of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0030] like Figure 1 to Figure 4 As shown, a welding nozzle coaxial dust suction and spiral blowing protective gas device comprises a pressing plate 1 on which a plurality of welding single nozzle assemblies 4 are mounted.

[0031] The welding single pressure nozzle assembly 4 includes a spiral inner sleeve 7 and a pressure nozzle 8. The top of the pressure nozzle 8 is connected to the upper pressure plate 1 through a plurality of cantilever pins 6. The spiral inner sleeve 7 is embedded in the pressure nozzle inner cavity of the pressure nozzle 8. A sleeve inner cavity 10 is provided on the inner side of the spiral inner sleeve 7. A plurality of spiral inner sleeve grooves are provided on the outer side of the spiral inner sleeve 7. A spiral ventilation cavity 12 is formed between the inner sleeve groove and the pressure nozzle inner cavity. A joint 9 is installed on a joint connecting cavity 11 on one side of the top of the pressure nozzle 8. The joint connecting cavity 11 is connected to the spiral ventilation cavity 12. Specifically, the joint connecting cavity 11 is connected to the side of the spiral ventilation cavity 12 close to the top. The bottom of the pressure nozzle 8 is the end weld area 13.

[0032] A protective gas blowing device 2 is installed on the pressure plate 1 on one side of the welding single pressure nozzle assembly 4. The protective gas blowing device 2 is connected to the joint 9 through a protective gas blowing connecting air pipe. The protective gas blowing connecting air pipe is a connecting hose structure.

[0033] A coaxial dust suction device 3 is also installed on the pressure plate 1 on one side of the welding single pressure nozzle assembly 4. The coaxial dust suction device 3 is connected to the spiral ventilation cavity 12 through a coaxial dust suction connecting air pipe. The coaxial dust suction connecting air pipe is a connecting hose structure. Specifically, the coaxial dust suction device 3 is connected to one side of the spiral ventilation cavity 12 near the bottom.

[0034] In addition, the top of the cantilever pin 6 is fixedly mounted on the pressure plate 1, the pressure nozzle 8 can move up and down on the cantilever pin 6, and a rectangular spring 5 is installed on the cantilever pin 6 above the pressure nozzle 8. The welding single pressure nozzle assembly 4 is connected to the pressure plate 1, and the product is pressed and welded by the rectangular spring 5.

[0035] like Figure 3 , a cross-sectional view of a welding single-pressure nozzle assembly 4, the laser passes through the inner cavity 10 of the bushing, and the two axes inside the galvanometer control the optical path to perform circular welding on the battery tab 16 on the square single battery 14. The shielding gas is input through the joint 9, passes through the spiral ventilation cavity 12, and evenly reaches the end weld area 13.

[0036] like Figure 1 and Figure 2 The pressing plate 1 is connected to the cantilever pin 6 of the welding single pressure nozzle assembly 4, so as to install a certain number of welding single pressure nozzle assemblies 4. The blowing protective gas device 2 is connected to the joint 9 through the air pipe to realize the circulation of the protective gas path during welding. The coaxial dust suction device 3 is fixed to the pressing plate 1 to realize the coaxial sealed dust suction during welding, and form a reflux with the protective gas path (i.e., the spiral ventilation cavity 12).

[0037] During the welding process, the pressure nozzle 8 is in close contact with the battery bar 16 to form a closed chamber. The dust generated during the welding process is sucked away by the coaxial dust suction device 3 to prevent the dust from secondary contamination of the product and the machine.

[0038] like Figure 2 and Figure 4 , the rectangular spring 5 is connected to the cantilever pin 6, and the floating pressure nozzle 8 compensates for the height deviation between the battery bar 16 and the battery pole 15. The spiral liner 7 is fixed to the pressure nozzle 8, and the protective gas forms a vortex through the spiral liner 7 to effectively cover the weld area. The joint 9 is connected through the air pipe and the pressure nozzle 8 to realize the transmission of the protective gas.

[0039] The present invention solves the problem of cold welding caused by uneven blowing of protective gas in welding of square shell battery module tabs, greatly improving the welding yield. The secondary pollution of the product is effectively isolated by the dust extraction device during welding.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A welding nozzle coaxial dust suction and spiral protective gas blowing device, comprising a pressing plate (1), on which a plurality of welding single nozzle assemblies (4) are mounted; Features: The welding single pressure nozzle assembly (4) comprises a spiral inner sleeve (7) and a pressure nozzle (8), the top of the pressure nozzle (8) is connected to the upper pressure plate (1) through a plurality of cantilever pins (6), the spiral inner sleeve (7) is embedded in the pressure nozzle inner cavity of the pressure nozzle (8), a sleeve inner cavity (10) is opened on the inner side of the spiral inner sleeve (7), a plurality of spiral inner sleeve grooves are arranged on the outer side of the spiral inner sleeve (7), a spiral ventilation cavity (12) is formed between the inner sleeve groove and the pressure nozzle inner cavity, a joint (9) is installed on the joint connecting cavity (11) on one side of the top of the pressure nozzle (8), the joint connecting cavity (11) is connected to the spiral ventilation cavity (12), and the bottom of the pressure nozzle (8) is an end weld area (13).

2. The welding nozzle coaxial dust suction and spiral blowing protective gas device according to claim 1, characterized in that: A protective gas blowing device (2) is installed on a pressure plate (1) on one side of the welding single pressure nozzle assembly (4), and the protective gas blowing device (2) is connected to a joint (9) via a protective gas blowing connecting air pipe.

3. The welding nozzle coaxial dust suction and spiral blowing protective gas device according to claim 2, characterized in that: The protective gas blowing connecting air pipe is a connecting hose structure.

4. The welding nozzle coaxial dust suction and spiral blowing protective gas device according to claim 1, characterized in that: The joint connecting cavity (11) is connected to a side of the spiral ventilation cavity (12) close to the top.

5. The welding nozzle coaxial dust suction and spiral blowing protective gas device according to claim 1, characterized in that: A coaxial dust suction device (3) is also installed on the pressure plate (1) on one side of the welding single pressure nozzle assembly (4), and the coaxial dust suction device (3) is connected to the spiral ventilation cavity (12) through a coaxial dust suction connecting air pipe.

6. The welding nozzle coaxial dust suction and spiral shielding gas blowing device according to claim 5, characterized in that: The coaxial dust suction connecting air pipe is a connecting hose structure.

7. The welding nozzle coaxial dust suction and spiral blowing protective gas device according to claim 5, characterized in that: The coaxial dust suction device (3) is in communication with a side of the spiral ventilation cavity (12) close to the bottom.

8. The welding nozzle coaxial dust suction and spiral shielding gas blowing device according to claim 1, characterized in that: The top of the cantilever pin (6) is fixedly mounted on the pressure plate (1), the pressure nozzle (8) can move up and down on the cantilever pin (6), and a rectangular spring (5) is mounted on the cantilever pin (6) above the pressure nozzle (8).

Images