Abutting and pressing device for battery cell welding

Abstract

The utility model relates to a pressing device for battery cell welding, which comprises a mounting seat and a copper nozzle, the copper nozzle is arranged on the mounting seat, and the interior of the copper nozzle is hollow to form a welding cavity; the protective gas inlet channel is arranged on the mounting seat and is communicated with the copper nozzle; the gas spiral guide piece is arranged in the copper nozzle so that the protective gas can be spirally guided and blown; one end of the elastic guide piece is arranged on the mounting seat, and the other end of the elastic guide piece is connected with the copper nozzle. The gas spiral guide part is arranged in the copper nozzle, so that protective gas introduced in the battery cell welding process can operate in the welding cavity in a spiral guide blowing manner, the protective gas can be uniformly distributed in the welding cavity, and uniform protection of the gas in the welding process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing equipment, in particular to a pressing device for battery core welding. Background Art

[0002] During the processing of lithium battery modules, it is necessary to weld the poles of multiple battery cells in series through a busbar to form a battery module. The currently commonly used welding process is laser welding. Laser welding requires the use of a copper nozzle to press the points to be welded, and simultaneously introduce inert gas into the welding chamber during the welding process to avoid high-temperature oxidation.

[0003] The existing protective gas blowing structure of the copper nozzle for laser welding is to simply set an air inlet channel on the copper nozzle, and inject inert gas into the welding cavity of the copper nozzle through the air inlet channel for welding protection. The exhaust gas generated during laser welding will gather in the copper nozzle, causing certain obstruction and reflection of the laser, reducing the utilization rate of the laser, and seriously affecting the quality of laser welding. Utility Model Content

[0004] The utility model aims to provide a pressing device for battery core welding, which ensures the uniformity of the introduction of protective gas into the welding chamber during battery core welding in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a pressing device for battery core welding, comprising:

[0007] Mounting seat,

[0008] A copper nozzle, the copper nozzle is arranged on the mounting seat, and the interior of the copper nozzle is hollow to form a welding cavity;

[0009] A protective gas inlet channel, the protective gas inlet channel being arranged on the mounting base and communicating with one side of the copper nozzle;

[0010] A gas spiral guide, the gas spiral guide being arranged in the copper nozzle to allow the protective gas to be spirally guided and blown;

[0011] An elastic guide member, one end of which is arranged on the mounting seat, and the other end of which is connected to the copper nozzle.

[0012] Furthermore, the copper nozzle includes an outer sleeve and an inner sleeve, a protective gas intake interlayer is provided between the outer sleeve and the inner sleeve, and the protective gas intake interlayer is communicated with the protective gas intake channel.

[0013] Furthermore, the gas spiral guide is provided on the outer sleeve and / or the inner sleeve.

[0014] Furthermore, a fixing seat is provided on the outer periphery of the copper nozzle, and the fixing seat is connected to the mounting seat through the elastic guide member.

[0015] Furthermore, it also includes a dust removal pipe, which is arranged on the upper surface of the mounting seat and communicates with the welding cavity.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a pressing device for battery core welding, which arranges a gas spiral guide inside a copper nozzle so that the shielding gas introduced during the battery core welding process can operate in the welding chamber in a spiral blowing manner, thereby making the shielding gas evenly distributed in the welding chamber, ensuring that the welding process is evenly protected by the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 This is a structural schematic diagram of a pressing device for battery core welding provided by the present invention (I);

[0020] Figure 2 This is a structural schematic diagram of a pressing device for battery core welding provided by the present invention (II);

[0021] Figure 3 This is a schematic cross-sectional view of a pressing device for battery core welding provided by the present invention;

[0022] The description of the accompanying drawings is as follows:

[0023] 1. Mounting seat; 2. Copper nozzle; 201. Outer sleeve; 202. Inner sleeve; 3. Protective gas inlet channel; 4. Gas spiral guide; 5. Elastic guide; 6. Fixed seat; 7. Dust removal pipe. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] See Figures 1 to 3 The pressing device for core welding in the present invention includes a mounting base 1, a copper nozzle 2, a protective gas inlet channel 3, a gas spiral guide 4 and an elastic guide 5.

[0026] The aforementioned copper nozzle 2 is mounted on the mounting base 1, specifically below it and integrally connected to it. Of course, the copper nozzle 2 can also be detachably attached to the mounting base 1, thereby facilitating maintenance and replacement of the copper nozzle and ensuring welding quality. The copper nozzle 2 is hollow inside, forming a vertically extending welding cavity on the mounting base 1 to facilitate core welding.

[0027] In addition, the number of copper nozzles 2 can be arranged according to actual needs, and 1, 2, 3 or 4 copper nozzles or other numbers can be set, as long as they can play a role in pressing the battery cell. It should be noted that setting multiple copper nozzles can meet the needs of multiple battery cell welding operations in parallel, thereby improving the efficiency of the welding operation and speeding up production.

[0028] In the embodiment of the present invention, the copper nozzle 2 includes an outer sleeve 201 and an inner sleeve 202, which are staggered and partially overlapped. A shielding gas inlet layer is formed between the outer sleeve 201 and the inner sleeve 202, and the shielding gas inlet layer is connected to the shielding gas inlet channel 3 and the welding chamber.

[0029] Regarding the above-mentioned shielding gas inlet channel 3, the channel is provided on the mounting base 1 and is connected to one side of the copper nozzle 2 through a hose, thereby providing a continuous supply of shielding gas to the aforementioned welding chamber. In the embodiment of the present invention, nitrogen is mostly used as the type of shielding gas. Of course, other shielding gases with inert properties such as helium and argon can also be selected according to actual needs. The shielding gas is used to protect the molten metal droplets during the welding process to prevent oxidation of the solidifying molten weld. It can also block impurities and moisture in the air from entering the welding chamber and affecting the welding quality, thereby avoiding the occurrence of situations in which the geometric characteristics of the weld joint are changed, thereby weakening the corrosion resistance of the weld, generating pores, and weakening the durability of the weld.

[0030] In the embodiment of the present invention, the welding chamber is connected to the outside world to discharge the waste gas during the welding process out of the welding chamber to prevent the waste gas from affecting the quality of the battery core welding.

[0031] In addition, in the embodiment of the present invention, a gas spiral guide 4 is provided on the copper nozzle 2. The gas spiral guide 4 can be provided on the inner wall of the outer sleeve 201 or on the outer wall of the inner sleeve 202. Of course, it can also be provided on both the outer sleeve 201 and the inner sleeve 202. The specific arrangement can be reasonably arranged according to the actual situation.

[0032] The provision of the gas spiral guide 4 is actually to add a spiral guide for the shielding gas in the aforementioned shielding gas inlet interlayer, so that when the shielding gas moves, it receives the spiral driving force, which helps the shielding gas to be spirally guided inside the copper nozzle 2, thereby allowing the shielding gas to be evenly introduced into the welding cavity and evenly dispersed in the welding cavity, ensuring that each site during the welding operation is in a shielding gas atmosphere.

[0033] In the embodiment of the present invention, the elastic guide 5 is connected to the mounting base 1 at one end, and connected to the copper nozzle 2 at the other end via the fixing base 6. The elastic guide 5 is provided to adjust the relative position of the copper nozzle 2, thereby changing the position of the copper nozzle 2 against the battery core during welding.

[0034] In the present invention, an elastic guide member 5 is connected to the four corners of the copper nozzle 2, that is, the fixed seat 6. The elastic guide member 5 can effectively maintain the stability of the copper nozzle 2 in the working state, reduce the guide error caused by the vibration generated during the processing, and improve the processing accuracy. In addition, the elastic guide member 5 can absorb a certain amount of impact and pressure, reduce the wear or damage of the copper nozzle 2 caused by external forces, and thus extend its service life. In addition, during the welding process, the distance between the battery cell and the copper nozzle 2 may change. The elastic guide member 5 can adapt to this change, so that the copper nozzle 2 can maintain a better contact state and ensure the welding effect. In addition, the number of elastic guide members 5 can be adjusted according to actual needs.

[0035] In addition, the pressing device for core welding disclosed in the present invention also includes a dust removal tube 7, which is disposed on the upper surface of the mounting base 1 and communicates with the aforementioned welding chamber. The dust removal tube 7 effectively removes smoke and dust generated during the welding process. If such smoke and dust accumulate in the welding chamber, they may negatively affect the welding quality and the penetration effect of the laser.

[0036] Dust removal ensures a clean weld surface, improving the strength and stability of welded joints. Furthermore, the dust removal pipe 7 effectively reduces the concentration of harmful substances in the welding environment, improving workplace air quality. Real-time dust removal reduces subsequent cleanup work and costs, maintains a clean production environment, and improves production efficiency.

[0037] In summary, the pressure device for core welding disclosed in this utility model allows inert shielding gas injected through the shielding gas inlet channel to enter the copper nozzle and welding chamber through the shielding gas inlet interlayer between the outer and inner sleeves, thereby forming a relatively independent annular shielding gas field, effectively enhancing the protection effect during laser welding. Furthermore, by providing a spiral gas guide within the shielding gas inlet interlayer to enhance the spiral blowing of the shielding gas, the entire welding chamber is exposed to a shielding gas atmosphere.

[0038] In addition, the exhaust gas generated in the welding chamber during the welding process can be discharged out of the copper nozzle through the welding chamber in time, avoiding the accumulation of exhaust gas in the copper nozzle and causing certain obstruction and reflection effects on the laser, which is beneficial to improving the utilization rate of the laser and improving the welding quality.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressing device for battery core welding, characterized in that: include: Mounting seat (1), A copper nozzle (2), the copper nozzle (2) being arranged on the mounting seat (1), and the interior of the copper nozzle (2) being hollow to form a welding cavity; A protective gas inlet channel (3), the protective gas inlet channel (3) being arranged on the mounting seat (1) and communicating with the copper nozzle (2); A gas spiral guide (4), the gas spiral guide (4) being arranged in the copper nozzle (2) to allow the protective gas to be spirally guided and blown; An elastic guide member (5), one end of the elastic guide member (5) is arranged on the mounting seat (1), and the other end of the elastic guide member (5) is connected to the copper nozzle (2).

2. The pressing device for battery core welding according to claim 1, characterized in that: The copper nozzle (2) comprises an outer sleeve (201) and an inner sleeve (202), a protective gas intake interlayer is provided between the outer sleeve (201) and the inner sleeve (202), and the protective gas intake interlayer is communicated with the protective gas intake channel (3).

3. The pressing device for battery core welding according to claim 2, characterized in that: The gas spiral guide (4) is arranged on the outer sleeve (201) and / or the inner sleeve (202).

4. The pressing device for battery core welding according to claim 1, characterized in that: A fixing seat (6) is provided on the outer periphery of the copper nozzle (2), and the fixing seat (6) is connected to the mounting seat (1) via the elastic guide member (5).

5. The pressing device for battery core welding according to claim 1, characterized in that: It also includes a dust removal pipe (7), which is arranged on the upper surface of the mounting seat (1) and communicates with the welding cavity.

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