Multi-station efficient welding device for lithium battery tabs

Abstract

The invention provides a multi-station lithium battery pole lug efficient welding device, and relates to the technical field of welding equipment.The multi-station lithium battery pole lug efficient welding device comprises a feeding welding conveying frame, a laser welding module, a lifting frame, an upper detection bridge frame and an exhaust funnel, the laser welding module is arranged above the feeding welding conveying frame, and the lifting frame is arranged on one side of the tail of the feeding welding conveying frame in an aligned mode; an upper detection bridge frame is placed on one side of the tail of the lifting frame in an aligned mode, a lower positioning ring is vertically arranged on the lower portion of the laser welding module in a sliding mode, an inner cooling channel is formed in the inner side of the lower portion of the lower positioning ring, and the head end and the tail end of the inner cooling channel communicate with a liquid return pipe and a liquid inlet pipe correspondingly. The outer side of a welding point contacted with the bottom of the lower positioning ring is synchronously cooled through flowing of cooling liquid in the inner cooling channel, heat transfer from the welding point to the outside in the welding process is reduced, a battery cell is protected, and the problem that a diaphragm or an electrode material near a tab is damaged due to heat transfer from the welding point to the outside is solved. And the performance of the lithium battery is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment for lithium battery manufacturing, and in particular to a multi-station lithium battery tab high-efficiency welding device. Background Art

[0002] The lithium battery tab welding device is a device used to reliably connect the battery tabs (positive and negative lead terminals) to electrode materials (such as copper foil, aluminum foil) or external circuits (such as bus bars). The quality of tab welding directly affects the conductivity, safety and life of the battery.

[0003] During the welding process of the tabs, high temperatures are generated at the welding points and heat is transferred to the outside. The transfer of high welding temperatures may cause damage to the diaphragm or electrode materials near the tabs, resulting in the risk of reduced lithium battery performance. In addition, the linear arrangement of multi-station processes results in excessive space occupancy and a long moving distance between personnel and equipment, which increases the moving distance of personnel during operations between equipment. Summary of the invention

[0004] The disclosed embodiment relates to a multi-station high-efficiency welding device for lithium battery tabs, in which a laser welding module performs welding processing inside a lower positioning ring, and at the same time, the lower positioning ring synchronously cools the outside of the welding point contacted by the bottom of the lower positioning ring by virtue of the circulation of coolant in the internal cooling channel, thereby effectively suppressing the heat transfer from the high temperature to the outside of the welding point during welding, protecting the battery cell to a great extent, and significantly reducing the risk of damage to the diaphragm or electrode material near the tab due to the high welding temperature, thereby causing a decrease in battery performance. The layout design of the upper detection bridge being arranged at a high place allows the bottom space to be passed by personnel, effectively avoiding the problems of excessive space occupation and long moving distance between personnel and equipment caused by the linear arrangement of multiple stations.

[0005] In a first aspect of the present disclosure, a multi-station lithium battery tab high-efficiency welding device is provided, which specifically comprises: a feeding welding conveyor frame, a laser welding module, a lifting frame, an upper detection bridge frame and an exhaust pipe, wherein a laser welding module is arranged above the feeding welding conveyor frame, a lifting frame is arranged on one side of the tail of the feeding welding conveyor frame, an upper detection bridge frame is arranged on one side of the tail of the lifting frame, another lifting frame is arranged on one side of the tail of the upper detection bridge frame, a middle conveying belt is installed on the middle belt shaft of the feeding welding conveyor frame, and the middle conveying belt is used to convey lithium batteries and related connecting parts of the lithium battery tabs, a first longitudinal moving frame and a second longitudinal moving frame are respectively arranged on the head and tail sides of the feeding welding conveyor frame through electric lead screw screw connection, and the upper parts of the first longitudinal moving frame and the second longitudinal moving frame are respectively arranged through electric lead screw screw connection The upper transverse moving frame, the middle electric lead screw of the upper transverse moving frame is screwed and matched with the vertical moving frame. When all the electric lead screws rotate, the first longitudinal moving frame and the second longitudinal moving frame slide horizontally along the upper part of the loading and welding conveying frame, the upper transverse moving frame slides horizontally along the upper part of the first longitudinal moving frame, and the vertical moving frame slides vertically along the lower part of the upper transverse moving frame. The top of the first longitudinal moving frame is horizontally extended to the outside of the loading and welding conveying frame, and the vertical moving frame on one side of the first longitudinal moving frame slides vertically and is provided with a negative pressure feeding module. An electric telescopic cylinder is provided between the upper transverse moving frame and the negative pressure feeding module. The negative pressure feeding module is provided or connected to a pump to generate negative pressure suction to achieve the suction and transportation of related connecting parts of the lithium battery pole ear.

[0006] In at least some embodiments, a lower positioning ring is vertically slidably provided at the lower part of the laser welding module, and the laser welding module performs laser welding operations on the inner side of the lower positioning ring. An internal cooling channel is provided on the inner side of the lower part of the lower positioning ring. The head and tail ends of the internal cooling channel are respectively connected to the return pipe and the liquid inlet pipe. The tail end of the return pipe is connected to the pump pipeline arranged inside the coolant storage tank. The external array of the coolant storage tank is provided with external fins. The coolant storage tank and the external fins are made of metal to improve the heat dissipation capacity.

[0007] In at least some embodiments, the laser welding module is fixedly arranged on a vertical movable frame on one side of the second longitudinal movable frame, a lower support spring is fixed between the lower positioning ring and the laser welding module, and an electric telescopic cylinder is arranged between the upper transverse movable frame and the laser welding module to realize the vertical position adjustment of the laser welding module.

[0008] In at least some embodiments, the lower positioning ring is symmetrically provided with U-shaped internal cooling channels on both sides, the tail end of the liquid inlet pipe is connected to the coolant storage tank pipeline, the coolant storage tank is fixed on the upper part of the upper horizontal movable frame, and the internal pump of the coolant storage tank drives the coolant in the return pipe, the internal cooling channel, and the liquid inlet pipe to circulate. The lower positioning ring relies on the circulation of the coolant in the internal cooling channel to achieve synchronous cooling of the outside of the welding point contacted by the bottom of the lower positioning ring.

[0009] In at least some embodiments, the upper part of the lower positioning ring is connected to an exhaust pipe, inner partitions are provided on the upper and lower parts of the exhaust pipe, a lower slag box is horizontally slidably installed below the exhaust pipe, and the upper part of the exhaust pipe is connected to an upper exhaust fan. The upper part of the upper exhaust fan is connected to a pipe to discharge air into a purification device for purification treatment.

[0010] In at least some embodiments, the inner partition inside the exhaust pipe is arranged at intervals, and the inner partition divides the interior of the exhaust pipe into a bent serpentine channel. The lower slag box is connected to the lower part of the exhaust pipe, and the lower slag box is located below the inner partition. The inner partition inside the exhaust pipe and the exhaust pipe together constitute a serpentine channel that bends up and down, thereby increasing the length of the smoke flow path. During the flow of smoke inside the exhaust pipe, after the solid particles collide with the inner partition, the flow velocity decreases and they fall under the action of gravity, thereby reducing the solid matter in the welding fume, and the solid particles in the fume fall into the lower slag box.

[0011] In at least some embodiments, a lifting chain is provided in the middle of the lifting frame through vertical gear meshing, and a motor drives the gear to drive the lifting chain to move vertically to achieve the lifting of the lifting platform. One side of the lifting chain is fixedly connected to the lifting platform, and the lifting frame and the lifting platform are vertically slidably connected. A middle conveying belt is provided in the middle of the lifting platform through a belt shaft.

[0012] In at least some embodiments, a middle conveying belt is provided in the middle of the upper detection bridge through a belt shaft, a second longitudinal movable frame is screwed together with an electric lead screw on the upper part of the upper detection bridge, a detection module is fixedly provided on the vertical movable frame of the second longitudinal movable frame on the upper part of the upper detection bridge, and the detection module performs visual inspection and resistance current detection after welding. The upper detection bridge is arranged at a high place, and the bottom of the upper detection bridge is accessible for personnel to pass.

[0013] The present invention provides a multi-station lithium battery tab efficient welding device, which has the following beneficial effects: The elastic support of the lower support spring enables the lower positioning ring to contact and apply pressure to the busbar first before laser welding, thereby achieving precise auxiliary positioning of the busbar and laying the foundation for subsequent high-quality welding operations.

[0014] The laser welding module performs welding processing inside the lower positioning ring. At the same time, the lower positioning ring relies on the circulation of coolant in the internal cooling channel to synchronously cool the outside of the welding point where the bottom of the lower positioning ring contacts, effectively suppressing the heat transfer from high temperature to the outside of the welding point during welding, protecting the battery cell to a great extent, and significantly reducing the risk of damage to the diaphragm or electrode material near the pole ear due to high welding temperature, thereby causing a decline in battery performance.

[0015] The exhaust pipe centrally sucks and discharges the smoke generated by welding inside the lower positioning ring. The inner baffle inside the exhaust pipe and the exhaust pipe together form a serpentine channel that bends up and down, which significantly increases the flow path length of the smoke. During the flow of smoke, solid particles collide with the inner baffle and fall into the lower slag box under the action of gravity, thereby realizing the centralized collection and treatment of solid matter, reducing solid matter in welding fume, and reducing the adhesion of solid matter in the smoke inside the lower positioning ring. It not only effectively reduces the solid matter content in the welding fume, improves the air quality around the welding area, but also reduces the negative impact of dust and pollutants generated by welding on welding quality. At the same time, it helps to maintain the stability of the air temperature inside the lower positioning ring, ensures the consistency of air temperature during welding, and provides favorable conditions for ensuring welding quality.

[0016] The top of the loading and welding conveyor rack is responsible for completing the alignment and welding process of the battery electrodes and the busbars. After welding is completed, the lifting platform lifts the welded battery to the upper inspection bridge for inspection. The upper inspection bridge is designed to be arranged at a high place, so that the bottom space can be used for personnel to pass, effectively avoiding the problems of excessive space occupation and long moving distance between personnel and equipment caused by the linear arrangement of multiple workstations, and significantly shortening the moving distance of personnel during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present application; Figure 2 A schematic diagram of a feeding welding conveyor structure of the present application is shown; Figure 3 A schematic diagram showing a first longitudinal movable frame structure of the present application is shown; Figure 4 A schematic diagram showing the structure of the laser welding module of the present application is shown; Figure 5A schematic structural diagram of the lower positioning ring of the present application is shown; Figure 6 A schematic structural diagram of a cross section of the lower positioning ring of the present application is shown; Figure 7 A schematic structural diagram of the exhaust pipe cross section of the present application is shown; Figure 8 A schematic structural diagram of the exhaust pipe of the present application is shown.

[0020] Reference numerals list 1. Loading welding conveyor frame; 101. Middle conveyor belt; 102. First longitudinal movable frame; 103. Upper transverse movable frame; 104. Vertical movable frame; 105. Negative pressure feeding module; 106. Second longitudinal movable frame; 2. Laser welding module; 201. Lower positioning ring; 202. Lower supporting spring; 203. Coolant storage tank; 204. External fins; 205. Internal cooling channel; 206. Liquid return pipe; 207. Liquid inlet pipe; 3. Lifting frame; 301. Lifting chain; 302. Lifting platform; 4. Upper detection bridge; 401. Detection module; 5. Exhaust pipe; 501. Inner partition; 502. Lower slag box; 503. Upper exhaust fan. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 8 : The present invention proposes a multi-station lithium battery tab efficient welding device, comprising: a loading and welding conveyor frame 1, a laser welding module 2, a lifting frame 3, an upper detection bridge frame 4 and an exhaust pipe 5, the middle belt shaft of the loading and welding conveyor frame 1 is cooperated with a middle conveying belt 101, the middle conveying belt 101 is used to convey lithium batteries and related connecting parts of lithium battery tabs, the head and tail sides of the loading and welding conveyor frame 1 are respectively provided with a first longitudinal moving frame 102 and a second longitudinal moving frame 106 through an electric lead screw screw connection, the upper parts of the first longitudinal moving frame 102 and the second longitudinal moving frame 106 are both provided with an upper transverse moving frame 103 through an electric lead screw screw connection, the middle part of the upper transverse moving frame 103 is provided with a vertical moving frame 104 through an electric lead screw screw connection, all When the electric lead screws rotate, the first longitudinal moving frame 102 and the second longitudinal moving frame 106 slide horizontally along the upper part of the loading and welding conveying frame 1, the upper transverse moving frame 103 slides horizontally along the upper part of the first longitudinal moving frame 102, and the vertical moving frame 104 slides vertically along the lower part of the upper transverse moving frame 103. The top of the first longitudinal moving frame 102 is horizontally extended to the outside of the loading and welding conveying frame 1, and the vertical moving frame 104 on one side of the first longitudinal moving frame 102 slides vertically and is provided with a negative pressure feeding module 105. An electric telescopic cylinder is provided between the upper transverse moving frame 103 and the negative pressure feeding module 105. The negative pressure feeding module 105 is provided or connected to a pump to generate negative pressure suction to achieve the suction and transportation of the related connecting parts of the lithium battery pole ear, and the loading and welding conveying A laser welding module 2 is arranged above the feeding frame 1, and a lower positioning ring 201 is arranged vertically and slidably at the lower part of the laser welding module 2. The laser welding module 2 performs laser welding operation on the inner side of the lower positioning ring 201. An inner cooling channel 205 is provided on the inner side of the lower part of the lower positioning ring 201. The head and tail ends of the inner cooling channel 205 are respectively connected with the return pipe 206 and the liquid inlet pipe 207. The tail end of the return pipe 206 is connected with the pump pipeline arranged inside the coolant storage tank 203. The outer array of the coolant storage tank 203 is provided with an outer fin 204. The coolant storage tank 203 and the outer fin 204 are made of metal. The laser welding module 2 is fixedly arranged on the vertical moving frame 104 on one side of the second longitudinal moving frame 106. The lower positioning ring 201 and the laser welding module 2 perform laser welding operation on the inner side of the lower positioning ring 201. The head and tail ends of the inner cooling channel 205 are respectively connected with the return pipe 206 and the liquid inlet pipe 207. The tail end of the return pipe 206 is connected with the pump pipeline arranged inside the coolant storage tank 203. The outer array of the coolant storage tank 203 is provided with an outer fin 204. The coolant storage tank 203 and the outer fin 204 are made of metal. The laser welding module 2 is fixedly arranged on the vertical moving frame 104 on the side of the second longitudinal moving frame 106. The lower positioning ring 201 and the laser welding module 2 perform laser welding operation on the inner side of the lower positioning ring 201. A lower support spring 202 is fixed between the modules 2, an electric telescopic cylinder is arranged between the upper horizontal moving frame 103 and the laser welding module 2 to realize the vertical position adjustment of the laser welding module 2, a lifting frame 3 is aligned and placed on one side of the tail of the loading welding conveyor frame 1, a lifting chain 301 is arranged in the middle of the lifting frame 3 in the vertical direction, and the motor drives the gear to drive the lifting chain 301 to move vertically to realize the lifting of the lifting platform 302, one side of the lifting chain 301 is fixedly connected to the lifting platform 302, the lifting frame 3 and the lifting platform 302 are vertically slidably connected, and the middle part of the lifting platform 302 is provided with a middle conveying belt 101 through a belt shaft, and the upper part of the lower positioning ring 201 is connected to the exhaust pipe 5, and the exhaust pipe 5 is provided with inner partitions 501 on the upper and lower sides.A lower slag box 502 is installed horizontally and slidably below the exhaust pipe 5. An upper exhaust fan 503 is connected to the upper part of the exhaust pipe 5. The upper exhaust fan 503 slides vertically on the side of the laser welding module 2. The upper part of the upper exhaust fan 503 is connected to the pipeline to exhaust the air to the purification device for purification. The upper detection bridge 4 is aligned on one side of the tail of the lifting frame 3, and another lifting frame 3 is aligned on one side of the tail of the upper detection bridge 4.

[0023] In the disclosed embodiment, inner cooling channels 205 with U-shaped structures are symmetrically arranged on both sides of the lower positioning ring 201, the tail end of the liquid inlet pipe 207 is connected to the coolant storage tank 203 by pipeline, and the coolant storage tank 203 is fixed on the upper part of the upper horizontal movable frame 103. The internal pump of the coolant storage tank 203 drives the coolant in the return pipe 206, the inner cooling channel 205, and the liquid inlet pipe 207 to circulate. The lower positioning ring 201 relies on the circulation of the coolant in the inner cooling channel 205 to achieve synchronous cooling of the outside of the welding point contacted by the bottom of the lower positioning ring 201, thereby reducing the temperature around the welding point, effectively suppressing the heat transfer from high temperature to the outside of the welding point during welding, and further reducing the damage of the diaphragm or electrode material near the pole ear due to high welding temperature.

[0024] In the disclosed embodiment, the inner partition 501 inside the exhaust pipe 5 is arranged at intervals, and the inner partition 501 divides the inside of the exhaust pipe 5 into a bent serpentine channel, the lower slag box 502 is connected to the lower part of the exhaust pipe 5, and the lower slag box 502 is located below the inner partition 501. The inner partition 501 inside the exhaust pipe 5 and the exhaust pipe 5 together constitute a serpentine channel that bends up and down, thereby increasing the length of the smoke flow path. During the flow of smoke inside the exhaust pipe 5, after the solid particles collide with the inner partition 501, the flow rate decreases and they fall under the action of gravity, thereby reducing the solid matter in the welding fume. The solid particles in the fume fall into the lower slag box 502, thereby realizing the centralized collection and treatment of solid matter such as welding slag.

[0025] In the disclosed embodiment, a middle conveying belt 101 is provided in the middle of the upper detection bridge 4 through a belt shaft, a second longitudinal movable frame 106 is screwed and provided on the upper electric lead screw of the upper detection bridge 4, and a detection module 401 is fixedly provided on the vertical movable frame 104 of the second longitudinal movable frame 106 on the upper detection bridge 4. The detection module 401 performs visual inspection and resistance current detection after welding. The upper detection bridge 4 is arranged at a high place, and the bottom of the upper detection bridge 4 is accessible for personnel to pass through, thereby avoiding the problems of excessive space occupation and excessive moving distance between personnel and equipment caused by the linear arrangement of multiple workstations, shortening the moving distance of personnel during operation, and further improving work efficiency.

[0026] Embodiment 2, on the basis of embodiment 1, the return liquid pipe 206 passes through a radiator, the radiator is composed of dense fins and an upper fan, the coolant passes through the radiator to transfer heat to the fins for cooling, the airflow of the upper fan drives the air to pass through the fins for cooling, further reducing the temperature of the return liquid pipe 206, and reducing the temperature of the return liquid pipe 206 returning to the coolant storage tank 203. At the same time, the coolant storage tank 203 can also be provided with a semiconductor refrigeration or compressor refrigeration module at the bottom for more efficient refrigeration.

[0027] The working principle of this embodiment is as follows: the middle conveyor belt 101 on the top of the loading and welding conveyor frame 1 is used to place the lithium batteries, and the negative pressure feeding module 105 is moved to the position of the lithium battery's pole ear by adsorbing the busbars and other components on the outside of the loading and welding conveyor frame 1 along the top truss of the first longitudinal moving frame 102 with the upper horizontal moving frame 103, and then the middle conveyor belt 101 moves the batteries and the arranged busbars and other components to the bottom of the laser welding module 2, and the laser welding module 2 welds the busbars below and the pole ears of the lithium battery, and the laser welding module 2 moves down with the vertical moving frame 104 close to the lithium battery below, and the lower support spring 202 supports the lower positioning ring 201 to contact the busbar and generate downward pressure, and the elastic support of the lower support spring 202 enables the lower positioning ring 201 to contact the busbar first and apply pressure before laser welding, so as to realize the precise auxiliary positioning of the busbar, and perform auxiliary positioning and fixing operations for the subsequent welding of the laser welding module 2; The laser welding module 2 performs laser welding processing on the inner side of the lower positioning ring 201 of the tubular structure. During welding, the internal pump of the coolant storage tank 203 drives the coolant in the return pipe 206, the internal cooling channel 205, and the inlet pipe 207 to circulate. The lower positioning ring 201 relies on the circulation of the coolant in the internal cooling channel 205. The lower positioning ring 201 realizes synchronous cooling of the outside of the welding point contacted by the bottom of the lower positioning ring 201, reduces the temperature around the welding point, effectively inhibits the heat transfer from the high temperature to the outside of the welding point during welding, reduces the heat transfer from the welding point to the outside, reduces the temperature change of the surrounding lithium battery materials, better protects the battery cells, and further reduces the damage of the diaphragm or electrode material near the pole ear due to the high welding temperature, thereby causing the battery performance to decline. During welding, the upper exhaust fan 503 is started to generate suction, and the upper exhaust fan 503 is connected to the exhaust pipe 5 to generate upward suction. The exhaust pipe 5 centrally sucks and discharges the smoke generated by welding inside the lower positioning ring 201. The inner partition 501 inside the exhaust pipe 5 and the exhaust pipe 5 together form a serpentine channel that bends up and down, thereby increasing the flow path length of the smoke. During the flow of smoke inside the exhaust pipe 5, the solid particles collide with the inner partition 501, the flow rate decreases, and fall under the action of gravity. The solid particles of the smoke fall into the lower slag box 502, thereby realizing the centralized collection and treatment of solids such as welding slag and reducing the amount of welding smoke. Solids, also reduce the filtering pressure of the rear filter, extend the service life of the filter, and reduce the adhesion of soot solids inside the lower positioning ring 201, reduce the corrosion of the lower positioning ring 201 by welding, extend the service life of the lower positioning ring 201, greatly reduce the solid content in the welding fume, further improve the air quality around the welding area, and reduce the negative impact of dust and pollutants generated by welding on the welding quality. At the same time, the hot air generated by welding is discharged outward along the exhaust pipe 5, which helps to maintain the stability of the air temperature inside the lower positioning ring 201, ensure the consistency of air temperature during welding, and provide favorable conditions to ensure welding quality; The top of the loading and welding conveyor frame 1 is responsible for completing the alignment and placement of the battery electrodes and the bus and the welding process. After welding is completed, the middle conveyor belt 101 moves the welded battery to the middle conveyor belt 101 of the lifting platform 302, and the motor drives the lifting chain 301 to move up and drives the lifting platform 302 to move up synchronously. The lifting platform 302 lifts the welded battery to a high place and aligns it with the middle conveyor belt 101 of the upper detection bridge 4. The middle conveyor belt 101 of the lifting platform 302 moves the battery to the middle conveyor belt 101 of the upper detection bridge 4, and the detection module 401 detects the lithium battery welded below. The upper detection bridge 4 is arranged at a high place. The bottom space of the upper detection bridge 4 is available for personnel to pass, which effectively avoids the problems of excessive space occupation and long moving distance between personnel and equipment caused by the linear arrangement of multiple workstations, significantly shortens the moving distance of personnel during operation, improves work efficiency, and optimizes the production space layout.

[0028] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0029] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0030] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A multi-station lithium battery tab high-efficiency welding device, comprising: A feeding welding conveyor frame (1), a laser welding module (2), a lifting frame (3), an upper detection bridge frame (4) and an exhaust pipe (5); characterized in that a laser welding module (2) is arranged above the feeding welding conveyor frame (1), a lifting frame (3) is arranged in alignment on one side of the tail of the feeding welding conveyor frame (1), an upper detection bridge frame (4) is arranged in alignment on one side of the tail of the lifting frame (3), another lifting frame (3) is arranged in alignment on one side of the tail of the upper detection bridge frame (4), a lower positioning ring (201) is arranged vertically slidingly at the lower part of the laser welding module (2), an inner cooling channel (205) is provided on the inner side of the lower part of the lower positioning ring (201), the head and tail ends of the inner cooling channel (205) are respectively connected to a return pipe (206) and a liquid inlet pipe (207), the tail end of the return pipe (206) is connected to a pump pipeline arranged inside a coolant storage tank (203), and an external array of the coolant storage tank (203) is provided with external fins (204).

2. A multi-station lithium battery tab high-efficiency welding device according to claim 1, characterized in that: The middle belt shaft of the loading and welding conveying frame (1) is equipped with a middle conveying belt (101), and the first and second sides of the loading and welding conveying frame (1) are respectively equipped with a first longitudinal movable frame (102) and a second longitudinal movable frame (106) through an electric screw threaded connection, and the upper parts of the first longitudinal movable frame (102) and the second longitudinal movable frame (106) are equipped with an upper transverse movable frame (103) through an electric screw threaded connection, and the middle part of the upper transverse movable frame (103) is equipped with a vertical movable frame (104) through an electric screw threaded connection, and the vertical movable frame (104) on one side of the first longitudinal movable frame (102) is vertically slidably equipped with a negative pressure feeding module (105), and an electric telescopic cylinder is arranged between the upper transverse movable frame (103) and the negative pressure feeding module (105).

3. A multi-station lithium battery tab high-efficiency welding device according to claim 2, characterized in that: The laser welding module (2) is fixedly arranged on a vertical moving frame (104) on one side of the second longitudinal moving frame (106); a lower support spring (202) is fixed between the lower positioning ring (201) and the laser welding module (2); and an electric telescopic cylinder is arranged between the upper transverse moving frame (103) and the laser welding module (2) to achieve vertical position adjustment of the laser welding module (2).

4. A multi-station lithium battery tab high-efficiency welding device according to claim 3, characterized in that: Internal cooling channels (205) in a U-shaped structure are symmetrically arranged on both sides of the lower positioning ring (201); the tail end of the liquid inlet pipe (207) is connected to a coolant storage tank (203) through a pipeline; and the coolant storage tank (203) is fixed to the upper part of the upper transverse movable frame (103).

5. A multi-station lithium battery tab high-efficiency welding device according to claim 4, characterized in that: The upper portion of the lower positioning ring (201) is connected to an exhaust pipe (5), the interior of the exhaust pipe (5) is provided with inner partitions (501) at the upper and lower parts, a lower slag box (502) is horizontally slidably installed below the exhaust pipe (5), and the upper portion of the exhaust pipe (5) is connected to an upper exhaust fan (503).

6. A multi-station lithium battery tab high-efficiency welding device according to claim 5, characterized in that: The inner baffle (501) inside the exhaust pipe (5) is arranged at intervals, and the inner baffle (501) divides the inside of the exhaust pipe (5) into a bent serpentine channel. The lower slag box (502) is connected to the lower part of the exhaust pipe (5), and the lower slag box (502) is located below the inner baffle (501).

7. A multi-station lithium battery tab high-efficiency welding device according to claim 2, characterized in that: A lifting chain (301) is provided in meshing engagement with a gear in a vertical direction in the middle of the lifting frame (3); one side of the lifting chain (301) is fixedly connected to a lifting platform (302); the lifting frame (3) and the lifting platform (302) are vertically slidably connected; a middle conveying belt (101) is provided in the middle of the lifting platform (302) via a belt shaft.

8. A multi-station lithium battery tab high-efficiency welding device according to claim 7, characterized in that: A middle conveying belt (101) is provided in the middle of the upper detection bridge (4) via a belt shaft, a second longitudinal movable frame (106) is provided in threaded connection with an electric lead screw at the top of the upper detection bridge (4), and a detection module (401) is fixedly provided on the vertical movable frame (104) of the second longitudinal movable frame (106) at the top of the upper detection bridge (4).

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