CN210615538U - Tab welding device and pelleter - Google Patents

Abstract

The utility model provides a tab welding device and a pelleter, which comprises a half-wave welding device, a frame, a welding seat arranged on the frame, a pole piece conveying assembly used for conveying a pole piece to the welding seat along a second direction, a tab conveying assembly used for conveying a tab to the welding seat along a third direction, and a pole piece inductor arranged on the welding seat and used for inducing the pole piece; the half-wave welding device is positioned on one side of the welding seat, extends above the welding seat and is opposite to the welding seat along the first direction, the half-wave welding device can tightly press the lug along the first direction and weld the lug on the lug, and the distance range of the welding position of the pole piece inductor and the lug along the second direction is 12 mm-40 mm; the second direction and the third direction are respectively vertical to the first direction, and the second direction is vertical to the third direction. The utility model provides a utmost point ear welding set and pelleter can support to make the shorter pole piece of length to be adapted to the miniaturized trend of electrical equipment, increase the battery product diversification.

Description

Tab welding device and pelleter

Technical Field

The utility model belongs to the technical field of the battery preparation, more specifically say, relate to an utmost point ear welding set and pelleter.

Background

A lithium battery, also called a lithium ion battery, is a device for storing electric charge, and is widely applied to various electrical appliances. The lithium ion battery comprises a pole piece and a pole lug, wherein the pole piece is used for winding to form a battery pole group, and the pole lug is welded on the pole piece, extends out of the battery unit and is used for leading out a positive pole or a negative pole of the battery pole group.

The device for welding the electrode lug on the electrode plate is an electrode lug welding device. Currently, most tab welding devices use full-wave spot welding to weld the tabs, that is, a welding head (also called a welder) for welding is positioned above a welding seat and supported by two sides (such a welder is also called a full-wave welder) for spot welding. Because all kinds of electrical equipment on the market are more and more tending towards the miniaturization, and above-mentioned utmost point ear welding set can support the length of the pole piece of making generally more than 80 millimeters, can't accomplish shorter for the volume of battery can't further reduce, leads to the diversified restriction of battery model, can't satisfy the market demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a utmost point ear welding set to solve present utmost point ear welding set and can't support the less battery sheet of preparation length, and then lead to the diversified restriction of battery model, can't satisfy the technical problem of market demand.

In order to achieve the above object, the utility model adopts the following technical scheme: provides a pole ear welding device, which comprises a half-wave welder, a frame and a welding seat arranged on the frame,

the welding direction of the half-wave welding device is a first direction, a second direction and a third direction are respectively vertical to the first direction, and the second direction is vertical to the third direction;

the pole lug welding device also comprises a pole lug conveying assembly used for conveying a pole lug to the welding seat along the second direction, a pole lug conveying assembly used for conveying a pole lug to the welding seat along the third direction, and a pole lug inductor arranged on the welding seat and used for inducing the pole lug;

the half-wave welder is positioned on one side of the welding seat, extends above the welding seat and is opposite to the welding seat along a first direction, and can tightly press the lug along the first direction and weld the lug on the lug; in the second direction, the distance between the pole piece inductor and the welding position of the pole lug ranges from 12 mm to 40 mm.

Further, utmost point ear welding set is still including being used for detecting whether there are first pole piece detector that the pole piece passes through, be used for detecting whether the positive and negative of pole piece is placed accurate second pole piece detector and is used for detecting whether the location of pole piece is accurate third pole piece detector, first pole piece detector second pole piece detector reaches third pole piece detector all locates on the welding seat.

Furthermore, the tab welding device further comprises a frame, a pressing component connected to the half-wave welding device and used for driving the half-wave welding device to move along the first direction.

Further, the pressure moving assembly comprises a pressure moving support and a welding cylinder, the pressure moving support is fixedly arranged on the rack, a cylinder body of the welding cylinder is fixedly arranged on the pressure moving support, and a piston rod of the welding cylinder extends along the first direction and is fixedly connected with the half-wave welding device.

Furthermore, the pressing component also comprises two guide rods, an upper cross frame and a lower cross frame; the two guide rods extend along the first direction, movably penetrate through the pressing support and are respectively positioned on two opposite sides of the welding cylinder, the upper ends of the two guide rods are fixedly connected with the upper cross frame, and the lower ends of the two guide rods are fixedly connected with the lower cross frame; and the piston rod of the welding cylinder and the half-wave welding device are fixedly connected with the lower cross frame.

Furthermore, the pressing component also comprises an adjusting part movably connected to the upper cross frame, the adjusting part is opposite to the welding cylinder in the first direction and can be abutted against the welding cylinder under the driving of the upper cross frame so as to limit the movement stroke of a piston rod of the welding cylinder to the direction of the lug; the distance between the adjusting piece and the welding cylinder along the first direction can be adjusted.

Furthermore, the adjusting part is a screw, a screw rod of the screw is spirally penetrated through the upper cross frame, a screw cap of the screw is just opposite to the welding cylinder along the first direction, and the screw cap can be driven by the upper cross frame to abut against the welding cylinder.

Further, the tab conveying assembly comprises a pushing unit and a pressing unit for pressing the tabs along the first direction; the pushing unit is arranged on the rack, fixedly connected with the pressing unit and used for conveying the pressing unit along the third direction so as to convey the lug to the welding seat along the third direction.

Further, the half-wave welder has a welding surface for directly contacting the tab, the welding surface has a length in the second direction in a range of 2 mm to 4 mm, and the welding surface has a length in the third direction in a range of 25 mm to 30 mm.

The utility model also provides a pelleter, including foretell utmost point ear welding set.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

the utility model provides a utmost point ear welding set, its half-wave welding ware only arranges in one side of welding seat, and this half-wave welding ware stretches the top of welding seat just right along the first direction with this welding seat, and the pole piece inductor that uses in the response pole piece can set up in the position more closely with utmost point ear welding department, and the condition that the pole piece inductor was bruised when utmost point ear welds does not take place, because the pole piece length that single battery convoluteed depends on pole piece inductor and utmost point ear welding department's distance, therefore the utility model provides a utmost point ear welding set can support and make the pole piece that length is shorter to be adapted to the miniaturized trend of electrical equipment, increase the battery product diversification.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a first structural schematic diagram of a tab welding device and a sheet making machine according to an embodiment;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a partial structural schematic view of a tab welding device according to an embodiment;

fig. 4 is a schematic partial structural view of a tab welding device according to an embodiment;

fig. 5 is a schematic structural diagram of a tab welding device and a pellet mill according to an embodiment;

FIG. 6 is an enlarged schematic view of portion B of FIG. 5;

FIG. 7 is a schematic diagram illustrating a partial structure of a pelleter in one embodiment.

Wherein, in the figures, the respective reference numerals:

m-pelleter; 10-tab welding device, 11-pole piece, 12-tab;

100-frame, 200-welding seat;

300-a pole piece conveying assembly, 310-a shifting sheet unit, 321-a rotating shaft, 311-a swing arm and 312-a material passing roller;

400-a lug conveying assembly, 410-a pushing unit, 411-a pushing motor, 412-a lead screw, 413-a nut piece, 420-a pressing unit, 421-a pressing support, 422-a pressing cylinder, 423-a pressing plate, 4231-a pressing part and 424-a guide plate;

500-half wave welder, 510-weld face;

600-a pole piece inductor;

700-a first pole piece detector;

800-a second pole piece detector;

900-third chip detector;

1000-tab inductor;

1100-pressing component, 1110-welding cylinder, 1120-pressing bracket, 1130-guide rod, 1140-upper transverse frame, 1150-lower transverse frame and 1160-adjusting piece;

1200-an anti-sticking assembly, 1210-a lifting cylinder and 1220-a pushing roller.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, it should be noted that the first direction is the moving direction of the half-wave welder 500, wherein the second direction, the third direction and the first direction are perpendicular to each other, that is, the second direction and the third direction are perpendicular to the first direction, and the second direction is perpendicular to the third direction. Specifically, please refer to the XYZ coordinate system in each drawing, wherein the first direction, the second direction and the third direction refer to the directions parallel to the X axis, the Y axis and the Z axis, respectively.

Referring to fig. 1 to 7, a tab welding device 10 according to the present invention will now be described. The tab welding device 10 comprises a machine frame 100, a welding seat 200, a pole piece conveying assembly 300, a tab conveying assembly 400, a half-wave welder 500 and a pole piece inductor 600. The welding seat 200 is disposed on the frame 100, and the pole piece transfer assembly 300 is used for transferring the pole piece 11 to the welding seat 200 along the second direction. The tab transfer assembly 400 is used to transfer the tab 12 to the weld nest 200 with the tab 12 positioned above the pole piece 11. The half-wave welding device 500 is disposed on one side of the welding base 200, and extends above the welding base 200 to be opposite to the welding base 200 along the first direction, and the half-wave welding device 500 can move along the first direction relative to the welding base 200 to compress the tab 12 on the welding base 200, and simultaneously weld the tab 12 on the pole piece 11. The pole piece inductor 600 is disposed on the welding seat 200, and a distance between the welding position of the pole piece inductor 600 and the tab 12 along the second direction is in a range of 12 mm to 40 mm.

It should be noted that, for the overall arrangement in the full wave welding device of the relative both sides of weld holder 200, the utility model provides a utmost point ear welding set 10, its half-wave welding ware 500 only arranges in one side of weld holder 200, and this half-wave welding ware 500 stretches to the top of weld holder 200 and this weld holder 200 is just right along the first direction for pole piece inductor 600 for responding to pole piece 11 can set up in the position more closely with utmost point ear 12 welding department, and the condition that pole piece inductor 600 was bruised when utmost point ear 12 welds does not take place, because the 11 length of the pole piece of single battery coiling depend on pole piece inductor 600 and the distance of utmost point ear 12 welding department, therefore the utility model provides an utmost point ear welding set 10 can produce pole piece 11 that length is shorter, thereby is adapted to the miniaturized trend of electrical equipment, increases the diversification of battery products.

It can be understood that, for the finished pole piece welded with the tab, the tab 12 is located at the middle position of the pole piece 11 along the length direction thereof, and the cutting position of the pole piece 11 is determined by the sensing signal of the pole piece sensor in the process of manufacturing the finished pole piece. For example, when the pole piece 11 is transferred through the pole piece transfer assembly 300, one signal is recorded when the pole piece sensor 600 senses the pole piece 11, and when the pole piece 11 stops at the welding position, the other signal is recorded when the pole piece 11 is stopped, and the controller can determine when to perform the cutting action according to the two signals, so that the length of the final pole piece 11 is twice the distance from the welding position of the pole lug 12 to the pole piece sensor 600, and therefore, the length of the pole piece 11 wound by a single battery depends on the distance from the welding position of the pole piece sensor 600 to the pole lug 12.

Preferably, in an embodiment, the distance between the welding position of the pole piece inductor 600 and the pole ear 12 along the second direction is 15 cm. Therefore, the embodiment of the utility model provides a tab welding device 10 then supports production welding length direction size at 30 centimetres pole piece 11. It will be appreciated that in this embodiment, the length direction of the pole piece 11 and the second direction are parallel to each other.

Preferably, in an embodiment, the pole piece sensor 600 is a fiber optic sensor.

Referring to fig. 1 to 4, in an embodiment, the tab welding apparatus 10 further includes a first pole piece detector 700, a second pole piece detector 800, and a third pole piece detector 900. The first pole piece detector 700, the second pole piece detector 800, and the third pole piece detector 900 are all disposed on the soldering base 200. Here, first and second pole piece detectors 700 and 800 are located on one side of pole piece 11 and third pole piece detector 900 is located on the other side of pole piece 11. The specific detection process is that deceleration is prompted when the first pole piece detector 700 detects that the pole piece 11 passes through; in the process, the second pole piece detector 800 detects the front and back sides of the pole piece 11, and if the front and back sides are wrong, the controller is prompted to control the shutdown and give an alarm; and the third pole piece detector 900 detects whether the positioning of the pole piece 11 is accurate, if there is a position deviation, in order to avoid the error of the next welding with the pole ear 12, the controller is prompted to alarm and the position of the pole piece 11 is adjusted. The first pole piece detector 700, the second pole piece detector 800 and the third pole piece detector 900 are added, so that the reliability, stability and accuracy of welding of the pole lugs 12 and the pole pieces 11 can be guaranteed, and the yield is effectively improved.

Referring to fig. 5 and 6, in an embodiment, the tab welding device 10 further includes a tab inductor 1000. It should be noted that before the tab 12 is welded to the pole piece 11, a partial area of the tab 12 needs to be encapsulated, which is used to prevent short circuit. The tab inductor 1000 is provided to the frame 100 and is located upstream of the tab transfer assembly 400 in the tab 12 transfer path. In this embodiment, the tab sensor 1000 is mainly used for detecting the encapsulation condition of the tab 12, determining whether a short circuit condition exists, if the encapsulation condition of the tab 12 is bad, then turning on an alarm through a controller, for example, a buzzer is turned to manual processing, and if the encapsulation condition of the tab 12 is good, the tab is sent into the welding seat 200 by the tab conveying assembly 400.

Referring to fig. 1 to 4, in an embodiment, the tab welding apparatus 10 further includes a pressing member 1100, wherein the pressing member 1100 is connected to the half-wave welder 500 and is mainly used for driving the half-wave welder 500 to move along a first direction. Referring to fig. 2, the pressing assembly 1100 includes a welding cylinder 1110, and a piston rod of the welding cylinder 1110 is fixedly connected to the half-wave welding device 500. It can be understood that the pressing assembly 1100 is a power source for driving the half-wave welder 500 to move along the first direction, and specifically includes a pressing bracket 1120 and a welding cylinder 1110, the pressing bracket 1120 is fixedly disposed on the frame 100, and the welding cylinder 1110 is fixedly disposed on the pressing bracket 1120, so that the cylinder body of the welding cylinder 1110 is stationary relative to the pressing bracket 1120 and the frame 100, and thus is stationary relative to the welding seat 200; the piston rod of welding cylinder 1110 and half-wave welder 500 fixed connection, and the piston rod extends along the first direction, and this welding cylinder 1110 and outside air supply intercommunication, positive or reverse motion along the first direction of mode control piston rod through aerifing or gassing, and then drive half-wave welder 500 and be close to or keep away from the utmost point ear 12 that is located on welding seat 200 along the first direction, and then realize the welding. Here, the cylinder is adopted to drive the half-wave welding device 500 to move, so that the straightness of the movement of the half-wave welding device 500 and the accuracy of the movement control can be effectively ensured. Of course, in other embodiments of the present invention, the welding cylinder 1110 may be replaced by other types of linear pushers, which are not limited herein.

Further, referring to fig. 1 to 4, in an embodiment, the pressing assembly 1100 further includes a guide bar 1130, an upper cross frame 1140 and a lower cross frame 1150. Two guide rods 1130 are disposed, the two guide rods 1130 are respectively located at two opposite sides of the welding cylinder 1110 and movably pass through the pressing bracket 1120, the upper ends of the two guide rods 1130 are fixedly connected through an upper cross frame 1140, the lower ends of the two guide rods 1130 are fixedly connected through a lower cross frame 1150, and the lower cross frame 1150 is further fixedly connected with the piston rod of the welding cylinder 1110, so that the piston rod moves up and down to simultaneously drive the two guide rods 1130, the upper cross frame 1140 and the lower cross frame 1150 to simultaneously move, thereby driving the two guide rods 1130 to slide along a first direction relative to the pressing bracket 1120, more specifically, the half-wave welder 500 is fixedly connected with the lower cross frame 1150 through a shaft rod (not shown), thereby realizing power transmission between the half-wave welder 500 and the piston rod of the welding cylinder 1110. Here, the two guide rods 1130 guide the movement of the piston rod of the welding cylinder 1110, so as to prevent the piston rod of the welding cylinder 1110 from shaking or deflecting during the movement.

Further, referring to fig. 1 to 4, in an embodiment, the pressing assembly 1100 further includes an adjusting member 1160, the adjusting member 1160 is movably connected to the upper cross frame 1140, and is opposite to the cylinder body of the welding cylinder 1110 along the first direction, and can also move along with the upper cross frame 1140 under the driving of the piston rod of the welding cylinder 1110 to abut against the cylinder body of the welding cylinder 1110. Preferably, the adjusting member 1160 is in threaded fit with the upper cross frame 1140, and can be screwed down along the first direction to be close to the welding cylinder 1110 and can be screwed up along the first direction to be away from the welding cylinder 1110, so that the distance between the adjusting member 1160 and the welding cylinder 1110 along the first direction can be changed by rotating the adjusting member 1160, and thus the downward stroke of the piston rod of the welding cylinder 1110 can be adjusted, and further the depth height of the welding of the tab 12 can be adjusted, and further the tab welding device 10 can meet various welding requirements. Further preferably, the adjustment element 1160 is a screw having a nut that is aligned with the cylinder body of the welding cylinder 1110 in the first direction.

Referring to fig. 1, in an embodiment, the pole piece transfer assembly 300 includes a drawing unit (not shown) for drawing the pole piece 11 toward the soldering nest 200 in the second direction, a storage tray (not shown) for placing the pole piece 11, and a pick unit 310 for drawing the pole piece 11 out of the storage tray. The drawing unit is disposed on the frame 100, and may be a finger clamping cylinder, the storage tray is rotatably connected to the frame 100 through a rotating shaft 321, the pole piece 11 is wound on the storage tray, and the pole piece 11 passes through a plurality of rollers and then enters the pick unit 310. The pick unit 310 includes a swing arm 311 and a rotating lever (not shown) rotatably connected to the frame 100. Wherein, the one end and the bull stick fixed connection of swing arm 311, the other end of swing arm 311 is connected with material roller 312, should cross material roller 312 and be used for around establishing pole piece 11 to can revolve the pole rotation under swing arm 311's drive, thereby will draw out around the pole piece 11 of locating the storage tray.

Referring to fig. 5 to 7, in an embodiment, the tab conveying assembly 400 includes a pushing unit 410 and a pressing unit 420. The pushing unit 410 is disposed on the frame 100, and is fixedly connected to the pressing unit 420, and is mainly used for conveying the pressing unit 420 in a third direction. The compressing unit 420 is used for compressing the tab 12 along the first direction, and the compressing unit 420 can convey the tab 12 to the welding seat 200 along the third direction under the driving of the pushing unit 410.

Further, in an embodiment, as shown in fig. 7, the pushing unit 410 is a lead screw and nut mechanism. Specifically, the pushing unit 410 includes a pushing motor 411, a lead screw 412 connected to the pushing motor 411, a nut member 413 screwed on the outer circumference of the lead screw 412, and a slide rail (not shown) extending along a third direction. The lead screw 412 extends along the third direction, the nut member 413 is fixedly connected to the pressing unit 420, and the slide rail is in sliding fit with the pressing unit 420. The nut member 413 can be driven by the pushing motor to move in the third direction, so as to drive the pressing unit 420 to slide relative to the sliding rail in the third direction.

Further, in an embodiment, referring to fig. 6, the pressing unit 420 includes a pressing bracket 421, a pressing cylinder 422, and a pressing plate 423. Wherein, the pressing bracket 421 is fixedly connected to the nut member 413. The cylinder body of the compressing cylinder 422 is fixedly connected with the compressing bracket 421, the piston rod of the compressing cylinder 422 extends along the first direction and is fixedly connected with the pressing plate 423, so that the pressing plate 423 can be driven to compress or release the tab 12 along the first direction by charging or discharging air in the compressing cylinder 422 through an external air source, and the pushing unit 410 is matched to complete the transmission of the tab 12.

It should be noted that, referring to fig. 6, the pressing plate 423 includes two pressing portions 4231 for pressing the tab 12, and a distance between the two pressing portions 4231 in the third direction is 5 times to 20 times a dimension of the tab 12 in the second direction, so that the pressing plate 423 has two contact points with the tab 12, which has higher stability compared to a manner of pressing the tab 12 by one pressing portion 4231. In addition, the pressing unit 420 further includes two guide plates 424, a through slot (not shown) extending along the third direction is left between the two guide plates 424, the through slot just allows the tab 12 to pass through without interfering with the tab 12, and does not allow the tab 12 to deviate from the third direction, so as to further prevent the tab 12 from deviating during the conveying process, and improve the position accuracy of the tab 12.

Referring to fig. 3 and 4, in an embodiment, the tab welding apparatus 10 further includes an anti-sticking assembly 1200, where the anti-sticking assembly 1200 includes a lifting cylinder 1210 and a pushing roller 1220. The lifting cylinder 1210 is fixedly disposed on the welding base 200, a piston rod of the lifting cylinder 1210 is fixedly connected to the ejection roller 1220, and the ejection roller 1220 is opposite to the pole piece 11 along the first direction. When the piston rod of the lifting cylinder 1210 moves upward under the action of the external air source, the pushing roller 1220 is pushed to push the pole piece 11 along the first direction, so as to push the pole piece 11 away from the welding seat 200, thereby facilitating the pole piece 11 to be continuously conveyed to the next station.

Referring to fig. 4, in one embodiment, a half wave welder 500 includes a welding surface 510 for direct contact with the tab 12. The welding surface 510 is rectangular, and the length of the welding surface 510 in the second direction is 2 mm to 4 mm, preferably 2 mm, and the length of the welding surface 510 in the third direction is 25 mm to 30 mm, preferably 26 mm.

Referring to fig. 1 to 7, the present invention further provides a sheet making machine, which includes the above tab welding device 10, and a wrapping device (not shown) for wrapping the tab 12. The pelleter also comprises a rubberizing device (not shown) for rubberizing after the welding of the pole lugs 12 and the pole pieces 11 is completed. In this embodiment, the adhesive tape sticking device is mainly used for sticking an adhesive tape on the welding position of the tab 12 and the pole piece 11 to increase the thickness and prevent the welded tab 12 from penetrating the pole piece 11 to scratch other materials. As will be appreciated, since the pellet mill includes the tab welding device 10, the pellet mill has all the advantages of the tab welding device 10, and will not be described herein again.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Utmost point ear welding set, its characterized in that: the welding device comprises a half-wave welding device, a rack and a welding seat arranged on the rack, wherein the moving direction of the half-wave welding device during welding is a first direction, a second direction and a third direction are respectively vertical to the first direction, and the second direction is vertical to the third direction; the pole lug welding device also comprises a pole lug conveying assembly used for conveying a pole lug to the welding seat along the second direction, a pole lug conveying assembly used for conveying a pole lug to the welding seat along the third direction, and a pole lug inductor arranged on the welding seat and used for inducing the pole lug;

the half-wave welder is positioned on one side of the welding seat, extends above the welding seat and is opposite to the welding seat along a first direction, and can tightly press the lug along the first direction and weld the lug on the lug; in the second direction, the distance between the pole piece inductor and the welding position of the pole lug ranges from 12 mm to 40 mm.

2. The tab welding device according to claim 1, wherein: utmost point ear welding set is still including being used for detecting whether there are first pole piece detector, the detection that is used for of pole piece process whether the positive and negative of pole piece place accurate second pole piece detector and be used for detecting whether accurate third pole piece detector in the location of pole piece, first pole piece detector second pole piece detector reaches third pole piece detector all locates on the welding seat.

3. The tab welding device according to claim 1, wherein: the tab welding device further comprises a rack which is connected with the pressing component of the half-wave welding device, and the pressing component is used for driving the half-wave welding device to move along the first direction.

4. The tab welding device according to claim 3, wherein: the pressure moves the subassembly and moves support and welding cylinder including the pressure, the pressure move the support fixed set up in the frame, the cylinder body of welding cylinder fixed set up in the pressure moves the support, the piston rod of welding cylinder is followed the first direction extends, and with half-wave welding ware fixed connection.

5. The tab welding device according to claim 4, wherein: the pressing component also comprises two guide rods, an upper transverse frame and a lower transverse frame; the two guide rods extend along the first direction, movably penetrate through the pressing support and are respectively positioned on two opposite sides of the welding cylinder, the upper ends of the two guide rods are fixedly connected with the upper cross frame, and the lower ends of the two guide rods are fixedly connected with the lower cross frame; and the piston rod of the welding cylinder and the half-wave welding device are fixedly connected with the lower cross frame.

6. The tab welding device according to claim 5, wherein: the pressure-moving assembly further comprises an adjusting piece movably connected to the upper cross frame, the adjusting piece is opposite to the welding cylinder in the first direction and can be abutted against the welding cylinder under the driving of the upper cross frame so as to limit the movement stroke of a piston rod of the welding cylinder to move towards the direction of the lug; the distance between the adjusting piece and the welding cylinder along the first direction can be adjusted.

7. The tab welding device according to claim 6, wherein: the adjusting piece is a screw, a screw rod of the screw penetrates through the upper cross frame in a spiral mode, a screw cap of the screw is opposite to the welding cylinder along the first direction, and the screw cap can be driven by the upper cross frame to abut against the welding cylinder.

8. The tab welding device according to any one of claims 1 to 7, wherein: the lug conveying assembly comprises a pushing unit and a pressing unit for pressing the lug along the first direction; the pushing unit is arranged on the rack, fixedly connected with the pressing unit and used for conveying the pressing unit along the third direction so as to convey the lug to the welding seat along the third direction.

9. The tab welding device according to any one of claims 1 to 7, wherein: the half-wave welder is provided with a welding surface which is used for being in direct contact with the pole lug, the length range of the welding surface along the second direction is 2 mm to 4 mm, and the length range of the welding surface along the third direction is 25 mm to 30 mm.

10. Pelleter, its characterized in that: comprising the tab welding device as claimed in any one of claims 1 to 9.

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