A spot welding device for battery production

Abstract

This utility model discloses a spot welding device for battery production, relating to the field of battery production technology. It includes: a base; a workbench for providing a platform for battery spot welding operations; a first air inlet connector located at one end of the workbench for introducing inert gas into one end of an annular gas path; a second air inlet connector located at the other end of the workbench for introducing inert gas into the other end of the annular gas path; a jetting mechanism located at the top of the workbench for uniformly spraying inert gas into the spot welding area through the annular gas path; a protective cover located at the end of the jetting mechanism for controlling the direction and range of inert gas injection; and a welding electrode located at the center of the base for performing spot welding operations on the battery. This utility model can form a stable inert gas protective layer in the spot welding area through an annularly distributed gas path system and a multi-directional jetting structure, improving welding quality and battery product performance.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and more specifically, to a spot welding device for battery production. Background Technology

[0002] Lithium-ion batteries and lithium iron phosphate batteries, as important components of new energy batteries, are widely used in electric vehicles and portable electronic devices. In the battery manufacturing process, spot welding technology is a key process for electrically connecting the electrodes, busbars, and connecting pieces inside the battery cell. With the rapid development of battery technology and the increasing application demands, the requirements for spot welding quality in battery production are becoming increasingly stringent, especially in the production of high-energy-density batteries, where spot welding quality directly affects the battery's safety performance and lifespan.

[0003] Currently, common battery spot welding equipment on the market mainly employs resistance spot welding or laser spot welding technologies. Traditional battery spot welding equipment typically only focuses on parameters such as electrode pressure, welding time, and welding current, with the welding process taking place in ordinary air. While some high-end equipment is equipped with simple gas protection devices, these are often single-point gas injection or localized coverage structures, resulting in uneven gas distribution and limited protection. During application, such equipment makes it difficult to completely isolate the spot welding area from air contact, especially for oxidation-sensitive battery materials such as aluminum alloys and nickel alloys, which are highly susceptible to oxidation reactions during high-temperature welding.

[0004] Existing battery spot welding equipment has the following shortcomings: Firstly, the inert gas protection in the welding area is incomplete, causing the battery material to easily oxidize upon contact with oxygen in the air during high-temperature spot welding, forming an oxide layer, reducing the conductivity of the welding contact surface, and affecting the welding quality. Secondly, the gas jet system is poorly designed and cannot achieve uniform protection with multi-directional coverage, especially for spot welding equipment with dual electrode head structures, which cannot effectively protect the two welding points simultaneously, resulting in inconsistent welding point strength. In addition, the existing equipment has low integration between the single-point gas jet structure and the welding mechanism, is complex to operate, and has low gas utilization, resulting in waste of inert gas. Therefore, there is an urgent need for a spot welding equipment for battery production that can provide all-round inert gas protection.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a spot welding equipment for battery production to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows: A spot welding device for battery production includes: a base for supporting the entire device; a worktable disposed on top of the base for providing a battery spot welding operation platform; a first air inlet connector disposed at one end of the worktable for introducing inert gas into one end of an annular gas path; a second air inlet connector disposed at the other end of the worktable for introducing inert gas into the other end of the annular gas path; a jetting mechanism disposed at the top of the worktable for uniformly spraying inert gas into the spot welding area through the annular gas path; a protective cover disposed at the end of the jetting mechanism for controlling the direction and range of inert gas jetting; and a welding electrode disposed at the center of the base for performing spot welding operations on the battery.

[0008] Furthermore, in order to achieve stable support for the equipment, the base includes a base body, the inner side of which is set as a hollow cavity structure, the top center of the base body is provided with a mounting hole that matches the welding electrode, and the top perimeter of the base body is provided with several bolt holes that match the worktable.

[0009] Furthermore, in order to achieve bidirectional entry of inert gas, the workbench includes a table panel located at the top of the base. A central through hole is provided in the middle of the table panel to cooperate with the welding electrode. A first air inlet pipe connected to a first air inlet connector is provided inside the table panel on one side of the central through hole, and a second air inlet pipe connected to a second air inlet connector is provided inside the table panel on the other side of the central through hole. Both the first air inlet pipe and the second air inlet pipe are provided with a one-way valve at one end on the same side of the table panel.

[0010] Furthermore, in order to achieve the goal of surrounding the battery spot welding area with an annular atmosphere formed by inert gas and effectively preventing oxidation reaction, the protective cover includes an annular platform located at the end of the jetting mechanism. A circular operating plate is fixedly installed at the bottom center of the annular platform, and a central opening that matches the welding electrode is opened in the center of the circular operating plate. An annular baffle is installed at the top center of the annular platform to control the flow direction of the inert gas ejected by the jetting mechanism to form an annular atmosphere. Several vertical grooves that match the jetting mechanism are opened on the outer side of the center of the annular platform. A nozzle mounting groove is opened in the center of the vertical groove facing the welding electrode to cooperate with the nozzle to divert the flow and guide the inert gas to be sprayed evenly towards the spot welding area.

[0011] Furthermore, to achieve uniform distribution and directional injection of inert gas within the annular space, thus covering the spot welding area with an annular atmosphere, the jetting mechanism includes a first connecting pipe located on one side of the first inlet pipe, a second connecting pipe located on one side of the second inlet pipe, and an annular pipe assembly located between the first and second connecting pipes. Several support sleeves, fixedly connected to the top of the platform, are fitted around the outer side of the annular pipe assembly. The annular pipe assembly includes two sets of L-shaped main nozzles symmetrically arranged at the ends of the first and second connecting pipes. The two sets of L-shaped main nozzles are connected by an annular pipe, which forms an annular structure surrounding the welding electrode. Several L-shaped branch pipes are symmetrically arranged at the ends of the annular pipe on both sides of the welding electrode. L-shaped auxiliary nozzles are arranged at the ends of the annular pipe away from the L-shaped main nozzles. The L-shaped main nozzles, L-shaped branch pipes, and L-shaped auxiliary nozzles all pass through the protective cover and face the center of the welding electrode. Several quick connectors are provided on the outer side of the annular pipe, and these quick connectors are sealed to both sides of the support sleeves to support and fix the annular pipe.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model has a scientific and novel structure. It can form a stable inert gas protective layer in the spot welding area through the annular gas path system and multi-directional jet structure, which can effectively prevent the battery materials from oxidizing when in contact with air during high-temperature spot welding, thereby improving welding quality and battery product performance.

[0013] 2. By setting up a base and a workbench, a spot welding platform with a stable overall structure and a reasonable air circuit layout is achieved. The hollow structure of the base reduces the weight of the equipment, and the combination of the air inlet pipe and one-way valve inside the workbench ensures the reliable sealing of the inert gas flow pipeline.

[0014] 3. By setting up a protective cover and jetting mechanism, the inert gas is evenly distributed and directionally injected in 360 degrees. The annular baffle guides the airflow to form an eaves-like protective barrier. The L-shaped main nozzle, the diverter pipe and the auxiliary nozzle work together to ensure that the spot welding area is completely covered, which solves the technical problem of easy oxidation of the welding area in traditional spot welding equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a spot welding device for battery production according to an embodiment of the present utility model; Figure 2This is a partial structural schematic diagram of a spot welding device for battery production according to an embodiment of the present utility model; Figure 3 This is an installation diagram of a spot welding device for battery production according to an embodiment of the present utility model; Figure 4 This is a partial structural schematic diagram of a protective cover in a spot welding equipment for battery production according to an embodiment of the present utility model; Figure 5 This is a partial structural diagram of the workbench and jetting mechanism in a spot welding equipment for battery production according to an embodiment of the present utility model; Figure 6 This is a partial structural schematic diagram of a ring tube assembly in a spot welding equipment for battery production according to an embodiment of the present utility model; Figure 7 yes Figure 4 A magnified view of a portion of point A in the middle.

[0017] In the picture: 1. Base; 101. Base body; 102. Mounting hole; 103. Bolt hole; 2. Workbench; 201. Table panel; 202. Central through hole; 203. First air inlet pipe; 204. Second air inlet pipe; 3. First air inlet connector; 4. Second air inlet connector; 5. Jet mechanism; 501. First connecting pipe; 502. Second connecting pipe; 503. Annular pipe assembly; 504. Support sleeve; 5031. L-shaped main nozzle; 5032. Annular pipe; 5033. L-shaped diverter pipe; 5034. L-shaped auxiliary nozzle; 5035. Quick connector; 6. Protective cover; 601. Annular platform; 602. Circular operating panel; 603. Central opening; 604. Annular baffle; 605. Vertical groove; 7. Welding electrode. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a spot welding device for battery production is provided.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-7 As shown, the spot welding equipment for battery production according to an embodiment of the present invention includes: Base 1, used to support the entire device; Workbench 2, located on top of base 1, serves as a platform for battery spot welding operations; The first air inlet connector 3 is located at one end of the workbench 2 and is used to introduce inert gas into one end of the annular gas path. The second air inlet connector 4 is located at the other end of the workbench 2 and is used to introduce inert gas to the other end of the annular air passage. The jetting mechanism 5 is located at the top of the workbench 2 and is used to uniformly spray inert gas into the spot welding area through an annular gas path. The protective cover 6 is located at the end of the jet mechanism 5 and is used to control the direction and range of the inert gas injection. Welding electrode 7 is located at the center of base 1 and is used for spot welding the battery.

[0021] It should be noted that the first air inlet connector 3 and the second air inlet connector 4 are connected to external inert gas supply pipelines, which can be connected to independent gas supply sources or connected to the same gas supply source through a distributor. The first air inlet connector 3 and the second air inlet connector 4 adopt a standard quick-connect or threaded connection structure, which facilitates quick connection and disconnection with the external inert gas supply system. At the same time, a sealing ring is provided inside the connector to ensure airtightness and prevent inert gas leakage and infiltration of outside air.

[0022] It should also be noted that the welding electrode 7 includes: an electrode base, an electrode rod, and a dual electrode head structure. The electrode base is used to fix the entire welding electrode 7 and is installed in conjunction with the mounting hole 102 of the base 1. The electrode rod is used to connect the electrode head and the electrode base and conduct welding current. The dual electrode head structure consists of two parallel cylindrical electrode heads, which can simultaneously form a current loop with two contact points of the battery electrode sheet to achieve a stable spot welding effect. Both the electrode rod and the electrode head are made of copper alloy material to ensure good conductivity and wear resistance, and can quickly dissipate heat to prevent overheating. This is existing technology and will not be described in detail here.

[0023] In one embodiment, for the base 1 and the workbench 2, the base 1 includes a base body 101, the inner side of which is configured as a hollow cavity structure. The top center of the base body 101 is provided with a mounting hole 102 that cooperates with the welding electrode 7. The top periphery of the base body 101 is provided with a plurality of bolt holes 103 that cooperate with the workbench 2. The workbench 2 includes a table panel 201 disposed at the top of the base 1. The center of the table panel 201 is provided with a central through hole 202 that cooperates with the welding electrode 7. Inside the table panel 201, on one side of the central through hole 202, a first air inlet pipe 203 connected to the first air inlet connector 3 is provided. Inside the table panel 201, on the other side of the central through hole 202, a second air inlet pipe 204 connected to the second air inlet connector 4 is provided. Both the first air inlet pipe 203 and the second air inlet pipe 204 are provided with a one-way valve at the same end of the table panel 201, thereby forming an inert gas inlet space.

[0024] The working principle of the base 1 and the workbench 2 is as follows: The base 1 reduces the weight of the equipment while ensuring sufficient strength through its hollow cavity structure. The mounting hole 102 is used to install the welding electrode 7 and make it extend stably to the working area. The bolt hole 103 is used to fix it to the workbench 2 with bolts. The workbench 2 serves as the operating platform for battery spot welding. The welding electrode 7 can pass through the central through hole 202 on the table panel 201 and extend to a suitable height. The first air inlet pipe 203 and the second air inlet pipe 204 are respectively connected to the first air inlet connector 3 and the second air inlet connector 4 to form a gas channel system. The one-way valve prevents the inert gas from flowing back and ensures the single direction of gas flow.

[0025] In one embodiment, the protective cover 6 includes an annular platform 601 disposed at the end of the jetting mechanism 5. A circular operating plate 602 is fixedly disposed at the bottom center of the annular platform 601. A central opening 603 that cooperates with the welding electrode 7 is provided in the center of the circular operating plate 602. An annular baffle 604 is disposed at the center of the top of the annular platform 601 to control the flow direction of the inert gas ejected by the jetting mechanism 5 to form an annular atmosphere. A plurality of vertical grooves 605 that cooperate with the jetting mechanism 5 are provided on the outer side of the center of the annular platform 601. A nozzle mounting groove is provided on the side of the vertical groove 605 facing the welding electrode 7 to cooperate with the nozzle to divert the inert gas and guide it to be sprayed evenly onto the spot welding area, so that the battery spot welding area is surrounded by an annular atmosphere formed by inert gas, effectively preventing oxidation reaction.

[0026] The working principle of the protective cover 6 is as follows: The protective cover 6 forms a stable inert gas barrier around the spot welding area. The annular platform 601 and the circular operating plate 602 form a basic support structure, and the central opening 603 ensures that the welding electrode 7 can be accurately installed in the spot welding area. The annular baffle 604 extends inward to form an eaves-like structure, which guides the sprayed inert gas downward, causing the gas to flow towards the spot welding area. The vertical groove 605 cooperates with the nozzle mounting groove, so that multiple nozzles from the jetting mechanism 5 can accurately spray inert gas towards the center area of ​​the spot welding, forming an annular atmosphere, effectively isolating oxygen in the air from contacting the spot welding area, and preventing the battery material from undergoing oxidation during the high-temperature spot welding process.

[0027] In one embodiment, the jet mechanism 5 includes a first connecting pipe 501 disposed on one side of the first air intake pipe 203, a second connecting pipe 502 disposed on one side of the second air intake pipe 204, an annular pipe assembly 503 disposed between the first connecting pipe 501 and the second connecting pipe 502, and a plurality of support sleeves 504 fixedly connected to the top of the platform 201 sleeved on the outer side of the annular pipe assembly 503; the annular pipe assembly 503 includes two sets of L-shaped main nozzles 5031 symmetrically disposed at the ends of the first connecting pipe 501 and the second connecting pipe 502, the two sets of L-shaped main nozzles 5031 being connected by an annular pipe 5032, and the annular pipe 5032 forming a ring surrounding the welding electrode 7. The annular pipe 5032 has several L-shaped diverter pipes 5033 symmetrically arranged at the ends on both sides of the welding electrode 7. An L-shaped auxiliary nozzle 5034 is arranged at the end of the annular pipe 5032 away from the L-shaped main nozzle 5031. The L-shaped main nozzle 5031, L-shaped diverter pipe 5033 and L-shaped auxiliary nozzle 5034 all pass through the nozzle mounting groove of the protective cover 6 and face the center of the welding electrode 7. Several quick connectors 5035 are arranged on the outside of the annular pipe 5032. The quick connectors 5035 are sealed to both sides of the support sleeve 504 to support and fix the annular pipe 5032, thereby realizing the uniform distribution and directional injection of inert gas in the annular space, so that the spot welding area is covered by the annular atmosphere.

[0028] It should be noted that, in practical applications, to ensure that the inert gas can be evenly distributed and form an effective injection pressure, the diameter of each pipe component needs to be rationally configured according to the principles of fluid dynamics. Specifically, the first inlet pipe 203 and the second inlet pipe 204 serve as the main inlet channels, and their diameters are set to the maximum value to ensure a sufficient gas supply; the diameters of the first connecting pipe 501 and the second connecting pipe 502 are set to be slightly smaller than the corresponding inlet pipe diameters to form an appropriate flow velocity transition; the annular pipe 5032 serves as the core pipeline for gas distribution, and its diameter is set to be greater than or equal to the connecting pipe diameter to ensure that the gas can be effectively collected and evenly distributed to each branch; while the L-shaped main nozzle 5031, the L-shaped branch pipe 5033, and the L-shaped auxiliary nozzle 5034 serve as the end injection components, and their diameters are set to be significantly smaller than the diameter of the annular pipe 5032; this utility model, through the "large inlet, small outlet" pipe diameter gradient design, enables the inert gas to obtain sufficient flow velocity and pressure during injection, thereby forming a stable and effective annular protective atmosphere in the spot welding area. This decreasing pipe diameter configuration not only conforms to the pressure distribution law of fluid mechanics, but also maximizes gas utilization efficiency and ensures the reliability of inert gas protection throughout the spot welding process.

[0029] The working principle of the jetting mechanism 5 is as follows: As the core component of this equipment, the jetting mechanism 5 ensures that the inert gas evenly covers the spot welding area through multi-level gas distribution. During operation, inert gases such as nitrogen and argon enter the first inlet pipe 203 and the second inlet pipe 204 through the first inlet connector 3 and the second inlet connector 4, respectively, and then enter the annular pipe assembly 503 through the first connecting pipe 501 and the second connecting pipe 502. In the annular pipe assembly 503, two sets of L-shaped main nozzles 5031 first spray the gas towards the spot welding area at the end of the welding electrode 7. The annular pipe 5032, through its annular structure, makes the gas evenly distributed around the welding electrode 7, and continues to be sprayed to the spot welding center area from multiple directions through the L-shaped diverter pipes 5033 symmetrically distributed on both sides. Finally, the gas on both sides of the annular pipe 5032 is distributed at the first inlet connector 3 and the second inlet pipe 204. Convection occurs at the furthest point of the gas connector 4. Due to the distance from the air inlet, the gas flow rate is reduced. At this time, the convection effect inside the annular pipe 5032 re-converges and accelerates the gas flow, thereby spraying it out to the spot welding area at a sufficient flow rate through the L-shaped auxiliary nozzle 5034, ensuring that this area also receives effective inert gas protection. The support sleeve 504 and quick connector 5035 not only provide stable support, but also ensure the reliable sealing of the gas circuit system and prevent gas leakage. This design keeps the spot welding area in an inert gas environment at all times, effectively preventing the battery materials from oxidizing when in contact with air during high-temperature spot welding, improving welding quality, and ensuring the stable performance of the produced batteries.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0031] In practical applications, the operator first places the battery cell or battery module to be spot-welded on the circular operating plate 602 of the protective cover 6, ensuring that the welding position of the battery is aligned with the dual electrode head structure of the welding electrode 7. Then, the external gas supply system is activated, and inert gas (such as nitrogen) enters from the first inlet connector 3 and the second inlet connector 4, respectively, and is guided through the first inlet pipe 203 and the second inlet pipe 204 to the first connecting pipe 501 and the second connecting pipe 502, and then enters the annular pipe 5032 of the annular pipe assembly 503. At this time, the two sets of L-shaped main nozzles 5031 begin to spray inert gas onto the spot-welding area at the end of the welding electrode 7, while multiple L-shaped nozzles on both sides of the annular pipe 5032 simultaneously... The shunt pipe 5033 continues to spray gas into the spot welding center area from different angles, while the L-shaped auxiliary nozzle 5034 located at the far end of the annular pipe 5032 accelerates the gas out through convection and convergence effects, ensuring that the entire spot welding area is completely surrounded by a uniform annular inert atmosphere. Under the guidance of the annular baffle 604 of the protective cover 6, the sprayed inert gas forms a stable downward airflow barrier, effectively isolating oxygen in the air. Once the annular protective atmosphere is established and stable, the welding electrode 7 can be activated to perform the spot welding operation. Under the full protection of the inert gas, the welding of the battery electrode or connecting piece is completed. Throughout the process, the battery material avoids oxidation reactions caused by contact with air, thereby ensuring the welding quality of the battery.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spot welding apparatus for battery production, characterized by, include: The base (1) is used to support the entire device; A workbench (2) is disposed on top of the base (1) and is used to provide a battery spot welding operation platform; The first air inlet connector (3) is located at one end of the workbench (2) and is used to introduce inert gas into one end of the annular gas path; The second air inlet connector (4) is located at the other end of the workbench (2) and is used to introduce inert gas to the other end of the annular gas path; The jetting mechanism (5) is located at the top of the workbench (2) and is used to uniformly spray inert gas into the spot welding area through an annular gas path. A protective cover (6) is provided at the end of the jet mechanism (5) for controlling the direction and range of the inert gas jet. The welding electrode (7) is located at the center of the base (1) and is used to spot weld the battery.

2. The spot welding apparatus for battery production according to claim 1, characterized by, The base (1) includes a base body (101), the inner side of which is configured as a hollow cavity structure, and the top center of the base body (101) is provided with an installation hole (102) that cooperates with the welding electrode (7), and the top periphery of the base body (101) is provided with several bolt holes (103) that cooperate with the workbench (2).

3. The spot welding apparatus for battery production according to claim 1, characterized by The workbench (2) includes a table panel (201) disposed at the top of the base (1). A central through hole (202) cooperating with the welding electrode (7) is provided in the middle of the table panel (201). A first air inlet pipe (203) connected to the first air inlet connector (3) is provided on one side of the central through hole (202) inside the table panel (201). A second air inlet pipe (204) connected to the second air inlet connector (4) is provided on the other side of the central through hole (202) inside the table panel (201). A one-way valve is provided at one end of the first air inlet pipe (203) and the second air inlet pipe (204) on the same side of the table panel (201).

4. The spot welding apparatus for battery production according to claim 1, characterized by The protective cover (6) includes an annular platform (601) disposed at the end of the jet mechanism (5). A circular operating plate (602) is fixedly disposed at the bottom center of the annular platform (601). A central opening (603) is provided in the center of the circular operating plate (602) to cooperate with the welding electrode (7).

5. The spot welding apparatus for battery production according to claim 4, characterized by An annular baffle (604) is provided at the top center of the annular platform (601) to control the flow direction of the inert gas ejected by the jet mechanism (5) to form an annular atmosphere. The annular platform (601) has several vertical grooves (605) on the outer side of the middle part that cooperate with the jetting mechanism (5). The middle part of the vertical groove (605) facing the welding electrode (7) has a nozzle mounting groove, which is used to cooperate with the nozzle to divert the flow and guide the inert gas to be sprayed evenly into the spot welding area.

6. The spot welding apparatus for battery production according to claim 3, characterized by The jet mechanism (5) includes a first connecting pipe (501) disposed on one side of the first air intake pipe (203), a second connecting pipe (502) disposed on one side of the second air intake pipe (204), an annular pipe assembly (503) disposed between the first connecting pipe (501) and the second connecting pipe (502), and a plurality of support sleeves (504) fixedly connected to the top of the table panel (201) are sleeved on the outside of the annular pipe assembly (503).

7. The spot welding apparatus for battery production according to claim 6, characterized by The annular pipe assembly (503) includes two sets of L-shaped main nozzles (5031) symmetrically arranged at the ends of the first connecting pipe (501) and the second connecting pipe (502). The two sets of L-shaped main nozzles (5031) are connected by an annular pipe (5032), and the annular pipe (5032) forms an annular structure surrounding the welding electrode (7).

8. The spot welding apparatus for battery production according to claim 7, characterized by, The annular pipe (5032) is symmetrically provided with several L-shaped diverter pipes (5033) at the ends on both sides of the welding electrode (7). The annular pipe (5032) is provided with an L-shaped auxiliary nozzle (5034) at the end away from the L-shaped main nozzle (5031). The L-shaped main nozzle (5031), L-shaped diverter pipe (5033) and L-shaped auxiliary nozzle (5034) all pass through the protective cover (6) and face the center of the welding electrode (7). Several quick connectors (5035) are provided on the outside of the annular pipe (5032). The quick connectors (5035) are sealed to both sides of the support sleeve (504) for supporting and fixing the annular pipe (5032).

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