CN217495225U - Pole lug welding device - Google Patents

Abstract

The utility model relates to a utmost point ear welding set, include: unwinding mechanism, hold-down mechanism, first welding mechanism, second welding mechanism and winding mechanism, unwinding mechanism are used for unreeling first foil, second foil and compound foil, and hold-down mechanism is used for compressing tightly the range upon range of foil that compound foil clamp formed between first foil and the second foil, and first welding mechanism welds first foil and second foil respectively in two relative surfaces of compound foil. The utility model discloses an unwinding mechanism unreels first foil, second foil and composite foil, hold-down mechanism can compress tightly the range upon range of foil that composite foil presss from both sides and locate to form between first foil and the second foil, prepare for the welding of range upon range of foil, first welding mechanism can reduce the energy that the composite foil of first welding mechanism direct contact produced, act on first foil and second foil with the energy, and can guarantee the welding effect of range upon range of foil, can avoid causing the overwelding in welding process, weld and pass, the problem of rosin joint.

Description

Pole lug welding device

Technical Field

The utility model relates to a battery processing technology field especially relates to a utmost point ear welding set.

Background

In the process of welding a tab of a lithium ion battery pole piece foil, the traditional welding mode adopts laser welding and ultrasonic welding, the laser welding is an efficient and precise welding method which utilizes a laser beam with high energy density as a heat source, the welding process belongs to a heat conduction type, namely, laser radiates the surface of a heating material, the surface heat is diffused inwards through heat conduction, and the material is melted by controlling parameters such as the width, the energy, the peak power, the repetition frequency and the like of laser pulse to form a specific molten pool; ultrasonic welding is carried out by converting 50/60 Hz current into 15, 20, 30 or 40KHz electric energy through an ultrasonic generator. The converted high-frequency electrical energy is converted again into mechanical motion of the same frequency by the transducer, and the mechanical motion is then transmitted to the welding head by a set of amplitude transformer devices which can change the amplitude. The weld head transfers the received vibrational energy to the joint of the work pieces to be welded, where the vibrational energy is frictionally converted to thermal energy to melt the plastic and thereby form the weld area.

The existing battery pole piece foil generally adopts composite foil, the structure of the composite foil is sequentially a bottom layer, a middle layer and an upper layer, the bottom layer and the upper layer both adopt foil, the middle layer adopts plastic film, the strength of the plastic film is lower, the thickness of the bottom layer and the upper layer is only 2-3 um, the ductility and the tensile strength of the bottom layer and the upper layer are too high, the absorption performance is not strong, and when the two welding modes are used, the problems of over-welding, welding penetration, insufficient power, insufficient welding and the like can be caused, and the two welding modes are single-station welding, so that the welding efficiency is low, and the welding process is not smooth.

SUMMERY OF THE UTILITY MODEL

Therefore, a tab welding device is needed to ensure the welding effect, effectively avoid the problems of over-welding, through-welding and insufficient welding in the welding process and improve the production efficiency.

A tab welding device comprising:

the unwinding mechanism comprises a first unwinding assembly, a second unwinding assembly and a third unwinding assembly, wherein the first unwinding assembly is used for unwinding a first foil, the second unwinding assembly is used for unwinding a second foil, the third unwinding assembly is used for unwinding a composite foil, and the first unwinding assembly, the second unwinding assembly and the third unwinding assembly are used for sequentially laminating the first foil, the composite foil and the second foil to form a laminated foil;

the pressing mechanism comprises a first pressing wheel and a second pressing wheel which are oppositely arranged, and the first pressing wheel and the second pressing wheel are mutually matched for pressing the laminated foil;

the first welding mechanism is arranged at the downstream of the pressing mechanism and used for welding the first foil and the second foil on two opposite surfaces of the composite foil respectively;

the second welding mechanism is used for welding the laminated foil welded by the first welding mechanism to a tab to form a tab assembly;

and the winding mechanism is used for winding the tab assembly welded by the second welding mechanism.

The first foil, the second foil and the composite foil are respectively unreeled, and the first foil, the composite foil and the second foil are sequentially laminated, so that the laminated foils can be pressed by the pressing mechanism, the first foil and the second foil can be respectively tightly attached to the composite foil, relative displacement is not easy to occur, the relative positions of the first foil, the composite foil and the second foil are fixed, and the welding quality can be improved; the first welding mechanism directly acts energy on the first foil and the second foil, the first foil and the second foil play a role in protecting the composite foil, energy generated when the first welding mechanism directly contacts the composite foil can be reduced, a welding effect can be ensured, and the problems of over-welding, through-welding and insufficient welding in the welding process are effectively avoided; through setting up second welding mechanism and winding mechanism, second welding mechanism will weld the range upon range of foil after first welding mechanism welding in utmost point ear to form utmost point ear subassembly, winding mechanism can the rolling utmost point ear subassembly, can shorten range upon range of foil and utmost point ear's welding preparation time, can improve production efficiency.

In one embodiment, an extrusion channel for extruding the laminated foil is formed between the first pressing wheel and the second pressing wheel, and the pressing mechanism further includes a pressing wheel driving portion for driving the first pressing wheel and the second pressing wheel to rotate synchronously.

In one embodiment, the tab welding device further comprises a pressure detection mechanism for detecting the welding pressure applied by the first welding mechanism to the laminated foil vertically.

In one embodiment, the tab welding device further includes a synchronous sensing mechanism, the first unwinding assembly, the second unwinding assembly and the third unwinding assembly respectively include an unwinding roller and an unwinding driving portion for driving the unwinding roller to rotate, and the synchronous sensing mechanism is configured to sense whether the unwinding rollers of the first unwinding assembly, the second unwinding assembly and the third unwinding assembly rotate synchronously.

In one embodiment, the tab welding device further includes a control module, and the control module is in communication connection with the synchronous sensing mechanism and the pressure detection mechanism, and is in control connection with the unwinding driving portion and the first welding mechanism.

In one embodiment, the first welding mechanism includes a driving rolling welding head, a driven rolling welding part and a welding head driving part for driving the driving rolling welding head to rotate, the driving rolling welding head and the driven rolling welding part are arranged oppositely, and a first welding channel for welding the laminated foil is formed between the driving rolling welding head and the driven rolling welding part.

In one embodiment, the tab welding device further comprises a tab feeding mechanism, the tab feeding mechanism is arranged corresponding to the second welding mechanism, and the tab feeding mechanism is used for conveying the tab to a tab welding station.

In one embodiment, the second welding mechanism includes a final welding head and a final welding driving part for driving the final welding head to move up and down, and a second welding channel for welding the laminated foil and the tab is formed between the final welding head and the tab feeding mechanism.

In one embodiment, the tab welding device further comprises a tab in-place detection mechanism, the tab in-place detection mechanism is used for detecting whether the tab reaches the tab welding station, the tab in-place detection mechanism is in communication connection with the control module, and the control module is in connection control with the final welding driving part.

In one embodiment, the first unwinding assembly and the second unwinding assembly are symmetrically arranged, the third unwinding assembly is arranged between the first unwinding assembly and the second unwinding assembly in a first direction, the third unwinding assembly is respectively spaced from the first unwinding assembly and the second unwinding assembly in a second direction, and the first direction intersects with the second direction.

In the scheme, the first foil, the second foil and the composite foil are respectively unreeled and are sequentially laminated, and the pressing mechanism can press the laminated foils, so that the first foil and the second foil are respectively tightly attached to the composite foil, relative displacement is not easy to occur, the relative positions of the first foil, the composite foil and the second foil are fixed, and the welding quality can be improved; the first welding mechanism directly acts energy on the first foil and the second foil, the first foil and the second foil play a role in protecting the composite foil, energy generated when the first welding mechanism directly contacts the composite foil can be reduced, a welding effect can be ensured, and the problems of over-welding, through-welding and insufficient welding in the welding process are effectively avoided; through setting up second welding mechanism and winding mechanism, second welding mechanism will pass through the range upon range of foil welding behind the welding of first welding mechanism to utmost point ear to form utmost point ear subassembly, winding mechanism can the rolling utmost point ear subassembly, can shorten range upon range of foil and the welding preparation time of utmost point ear, can improve production efficiency.

Drawings

Fig. 1 is a schematic structural view of a tab welding device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is an enlarged view of fig. 1 at B.

Description of the reference numerals

10. A tab welding device; 100. an unwinding mechanism; 110. a first unwinding assembly; 120. a second unwinding assembly; 130. a third unwinding assembly; 200. a hold-down mechanism; 210. a first pinch roller; 220. a second pinch roller; 300. a first welding mechanism; 310. an active roll weld head; 320. a driven roll-weld section; 321. a driven bonding tool; 322. a slave welding drive part; 330. a main welding drive part; 400. a second welding mechanism; 410. a slide rail final welding head; 420. a final welding driving part; 500. a winding mechanism; 600. laminating the foil; 610. a first foil; 620. a second foil; 630. compounding foil; 700. a tab feeding mechanism; 710. a limiting component; 720. A tab transport assembly; 800. and (7) a tab.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

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 intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, 2 and 3, an embodiment of the present invention relates to an electrode tab welding device 10, which includes an unwinding mechanism 100, a pressing mechanism 200, a first welding mechanism 300, a second welding mechanism 400 and a winding mechanism 500, wherein the unwinding mechanism 100 is used for unwinding a first foil 610, a second foil 620 and a composite foil 630, and the first foil 610, the composite foil 630 and the second foil 620 are sequentially stacked to form a stacked foil 600; the pressing mechanism 200 is used for pressing the laminated foil 600; the first welding mechanism 300 is used for welding the first foil 610 and the second foil 620 to two opposite surfaces of the composite foil 630, respectively; the second welding mechanism 400 is used for welding the laminated foil 600 welded by the first welding mechanism 300 to the tab 800 to form a tab assembly; the winding mechanism 500 is used for winding the tab assembly welded by the second welding mechanism 400.

Referring to fig. 1 and 2, the unwinding mechanism 100 includes a first unwinding assembly 110 for unwinding a first foil 610, a second unwinding assembly 120 for unwinding a second foil 620, and a third unwinding assembly 130 for unwinding a composite foil 630. The first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 are used for sequentially laminating a first foil 610, a composite foil 630 and a second foil 620 to form a laminated foil 600. The first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 all include an unwinding roller and an unwinding driving portion for driving the unwinding roller to rotate. The unreeling driving part adopts a motor. The first unwinding assembly 110 and the second unwinding assembly 120 are symmetrically arranged. The third unwinding assembly 130 is disposed between the first unwinding assembly 110 and the second unwinding assembly 120 in the first direction. The third unwinding assembly 130 is spaced apart from the first unwinding assembly 110 and the second unwinding assembly 120 in a second direction, and the first direction and the second direction are perpendicular to each other. So set up and to realize that first foil 610, composite foil 630 and second foil 620 all follow the horizontal direction and carry, can reduce first foil 610, composite foil 630 and second foil 620 and appear the phenomenon of folding, wrinkling in transportation process, roughness when effectively guaranteeing to weld further guarantees welding quality.

It should be understood that the composite foil 630 is disposed parallel to the first foil 610 and the second foil 620, respectively, and the composite foil 630 is disposed between the first foil 610 and the second foil 620, meanwhile, the first foil 610 and the second foil 620 are disposed symmetrically with respect to the composite foil 630. When the first foil 610 and the second foil 620 are respectively unreeled, the first foil 610 and the second foil 620 can enter the welding station through a path with the same length, so that the tension difference between the first foil 610 and the second foil 620 can be reduced. The unwinding tension of the first and second unwinding assemblies 110 and 120 is 100-.

In this embodiment, the composite foil 630 includes a third foil, a fourth foil and a plastic film layer disposed between the third foil and the fourth foil, and the third foil and the fourth foil are respectively bonded to the plastic film layer. In other possible embodiments, the third foil, the plastic film layer and the fourth foil are sequentially joined together by thermal fusion.

Referring to fig. 1, the tab welding apparatus 10 includes a synchronous sensing mechanism and a control module, wherein the synchronous sensing mechanism is used for sensing whether unwinding rollers of the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 rotate synchronously. The control module is in communication connection with the synchronous sensing mechanism and controls the unwinding driving parts connected with the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130. The control module is used for realizing automatic control, and can adopt a PLC (programmable logic controller) or an MCS-51 singlechip, for example.

In this embodiment, the synchronous sensing mechanism includes a first motor speed detection module, a second motor speed detection module, and a third motor speed detection module, and the first motor speed detection module is configured to detect a speed of the unwinding driving portion of the first unwinding assembly 110. The second motor rotation speed detection module is configured to detect a rotation speed of the unwinding driving portion of the second unwinding assembly 120. The third motor rotation speed detection module is configured to detect a rotation speed of an unwinding driving portion of the third unwinding assembly 130. The first motor rotating speed detection module, the second motor rotating speed detection module and the third motor rotating speed detection module all adopt rotating speed sensors.

The first motor rotation speed detection module, the second motor rotation speed detection module and the third motor rotation speed detection module transmit the detected signals to the control module, and the control module judges whether the unwinding driving parts of the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 synchronously rotate and whether the rotation speeds are consistent according to the received signals.

In other possible embodiments, the first motor speed detection module, the second motor speed detection module, and the third motor speed detection module may all employ a motor speed detection circuit. The first motor rotation speed detection module, the second motor rotation speed detection module and the third motor rotation speed detection module are respectively electrically connected with the unwinding driving portions of the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130.

In other embodiments, the synchronous sensing mechanism includes a first unwinding roller rotation speed detecting module, a second unwinding roller rotation speed detecting module and a third unwinding roller rotation speed detecting module, and the first unwinding roller rotation speed detecting module is configured to detect the rotation speed of the unwinding roller of the first unwinding assembly 110. The second unwinding roller rotation speed detecting module is used for detecting the rotation speed of the unwinding roller of the second unwinding assembly 120. The third unwinding roller rotation speed detection module is configured to detect a rotation speed of an unwinding roller of the third unwinding assembly 130. The first unwinding roller rotating speed detection module, the second unwinding roller rotating speed detection module and the third unwinding roller rotating speed detection module all adopt rotating speed sensors.

Referring to fig. 1 and 2, the pressing mechanism 200 includes a first pressing wheel 210 and a second pressing wheel 220 that are disposed opposite to each other, and the first pressing wheel 210 and the second pressing wheel 220 cooperate with each other to press the laminated foil 600. The first pinch roller 210 and the second pinch roller 220 are symmetrically arranged. A pressing passage for pressing the laminated foil 600 is formed between the first pressing wheel 210 and the second pressing wheel 220.

The pressing mechanism 200 can reduce the interval between the first foil 610, the composite foil 630 and the second foil 620, so that the first foil 610, the composite foil 630 and the second foil 620 are tightly attached to each other, relative displacement is not easy to occur, the relative positions of the first foil 610, the composite foil 630 and the second foil 620 are fixed, and the welding quality of the first foil 610, the composite foil 630 and the second foil 620 can be improved. In one embodiment, before the compressing mechanism 200 is not compressed, the first foil 610 and the second foil 620 are respectively spaced from the composite foil 630 by 0.5-1mm, and the first foil 610, the second foil 620 and the composite foil 630 are respectively spaced from 0-0.2mm after being compressed by the first compressing wheel 210 and the second compressing wheel 220.

The pressing mechanism 200 further includes a pressing wheel driving part for driving the first pressing wheel 210 and the second pressing wheel 220 to rotate synchronously. The pinch roller driving part adopts a motor. The first pinch roller 210 and the second pinch roller 220 are made of metal. Specifically, the first pinch roller 210 and the second pinch roller 220 are made of aluminum, and are subjected to surface oxidation treatment.

Referring to fig. 1 and 2, the first welding mechanism 300 is an ultrasonic welding mechanism. The first welding mechanism 300 includes a driving roller welding head 310, a driven roller welding part 320, a main welding driving part 330 for driving the driving roller welding head 310 to rotate, and a transducer for driving the driving roller welding head 310 to vibrate along the axial direction of the driving roller welding head 310, and driving the driving roller welding head 310 to vibrate through the transducer, so that the driving roller welding head 310 performs ultrasonic welding on the laminated foil 600. The main welding driving part 330 drives the driving rolling tool 310 to rotate, and can drive the laminated foil 600 to horizontally move.

The driving roller 310 is disposed opposite to the driven roller 320, and a first welding passage for welding the laminated foil 600 is formed between the driving roller 310 and the driven roller 320. Specifically, the driven roll welding part 320 includes a driven roll welding head 321 and a driven welding driving part 322 for driving the driven roll welding head 321 to move up and down. A first weld path is formed between the driving roller 310 and the driven roller 321. Active roller 310 is positioned above the laminated foil 600 and active roller 310 welds the top surface of the laminated foil 600. The driven roller 321 is positioned below the laminated foil 600, and the driven roller 321 welds the bottom surface of the laminated foil 600. The first foil 610 and the second foil 620 can be welded on two opposite surfaces of the composite foil 630 respectively by the mutual matching of the driving rolling welding head 310 and the driven rolling welding head 321, and the welding between the first foil 610 and the composite foil 630 and the welding between the second foil 620 and the composite foil 630 are performed simultaneously, so that the welding efficiency and quality are improved.

The slave welding drive unit 322 employs an air cylinder. The driven rolling tool 321 can apply pressure to the laminated foil 600 by providing upward acting force for the driven rolling tool 321 from the welding driving part 322, so that the driven rolling tool 321 is in close contact with the laminated foil 600, and the welding quality is effectively improved. The driving rolling welding head 310 and the driven rolling welding head 321 both adopt circular welding heads, and welding working faces are arranged on the outer circumferences of the circular welding heads, so that the contact faces of the circular welding heads and the laminated foil 600 are small. In one embodiment, the welding area of the laminated foil 600 is 30-50mm, the amplitude of the first welding mechanism 300 is 20-50Khz, the power is 2500W, the welding pressure is 0.2-0.5Mpa, and the welding speed is 8-12 r/min.

Referring to fig. 1 and 2, the tab welding apparatus 10 further includes a pressure detecting mechanism for detecting a welding pressure vertically applied to the laminated foil 600 by the first welding mechanism 300. The control module is in communication with the pressure detection mechanism and is in control connection with the first welding mechanism 300. The pressure detection mechanism adopts a pressure sensor.

Specifically, a pressure detection mechanism is provided on the driven roller head 321, which detects the welding pressure applied to the laminated foil 600 in real time and transmits the data to the control module. For example, when the pressure detection mechanism detects that the welding pressure applied to the laminated foil 600 is greater than a set value, the control module controls the slave welding driving part 322 to operate to move the slave rolling tool 321 downward, so that the welding pressure can be reduced. In one embodiment, the welding pressure is adjusted in the range of 0.2-0.8 MPa.

Referring to fig. 1, 2 and 3, the tab welding device 10 further includes a tab feeding mechanism 700, the tab feeding mechanism 700 is disposed corresponding to the second welding mechanism 400, and the tab feeding mechanism 700 is configured to transport the tab 800 to a tab welding station. The tab welding station is located on the bottom surface of the laminated foil 600. The tab feeding mechanism 700 comprises a limiting assembly 710 and a tab transporting assembly 720, wherein the limiting assembly 710 is provided with a limiting groove for storing the tab 800, and the inner wall of the limiting groove can limit the tab 800 so that the tab 800 can be stored according to a specified position and shape. The limiting groove is communicated with a discharge hole of the tab transportation assembly 720 and used for transporting the tab 800 to the limiting groove. The tab transport assembly 720 employs a vibration plate.

The second welding mechanism 400 includes a final welding horn and a final welding driving part 420 for driving the final welding horn to move up and down. A second welding channel for welding the laminated foil 600 and the tab 800 is formed between the final welding head and the tab feeding mechanism 700. By welding the laminated foil 600 and the tab 800, the tensile strength of the tab 800 during welding is increased, and the laminated foil 600 is in contact with the tab 800, so that the conductivity can be ensured. The second welding mechanism 400 employs an ultrasonic welding mechanism. The final welding head adopts a square welding head. In one embodiment, the second welding mechanism 400 has an amplitude of 30 to 40Khz, a power of 5500W, a welding pressure of 0.2 to 0.5Mpa, and a welding time of 0.3 to 0.5 s.

Referring to fig. 1, 2 and 3, the tab welding device 10 further includes a tab in-place detection mechanism for detecting whether the tab 800 reaches a tab welding station, the tab in-place detection mechanism is in communication connection with a control module, and the control module is in connection with a final welding driving portion 420. When the tab in-place detection mechanism detects that the tab 800 reaches the tab welding station, the control module controls the final welding driving part 420 to operate so as to drive the final welding head to move downwards, so that the laminated foil 600 and the tab 800 are welded.

Referring to fig. 1 and 2, the winding mechanism 500 includes a winding roller and a winding driving portion, and the winding driving portion is configured to drive the winding roller to rotate so as to wind the tab assembly welded by the second welding mechanism 400. The control module controls the winding mechanism 500. In one embodiment, the winding tension of the winding mechanism 500 is 100 and 220N. It should be understood that the first foil 610 discharged from the first unwinding assembly 110, the second foil 620 discharged from the second unwinding assembly 120, and the composite foil 630 discharged from the third unwinding assembly 130 all reach the winding mechanism 500 through the pressing mechanism 200, the first welding mechanism 300, and the second welding mechanism 400, and the unwinding tension and the winding tension can be adjusted by controlling the unwinding speed of the first unwinding assembly 110, the second unwinding assembly 120, and the third unwinding assembly 130 and the winding speed of the winding mechanism 500.

The utility model discloses a utmost point ear welding set 10 sets up on winding mechanism 500 after looping through hold-down mechanism 200, first welding mechanism 300, second welding mechanism 400 with first foil 610 that unreels subassembly 110 and the second foil 620 that unreels subassembly 120 and the first end that the third unreeled composite foil 630 that subassembly 130 emitted at first when using.

The control module controls the unwinding driving parts of the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 to synchronously rotate so as to drive the unwinding rollers of the first unwinding assembly 110, the second unwinding assembly 120 and the third unwinding assembly 130 to synchronously rotate, and simultaneously, the control module controls the winding driving parts to synchronously rotate so as to drive the winding rollers to rotate, so that the first foil 610, the second foil 620 and the composite foil 630 move at the same speed.

The first pinch roller 210 and the second pinch roller 220 are driven by the pinch roller driving portion to synchronously rotate, so that the first pinch roller 210 and the second pinch roller 220 are mutually matched to compress the laminated foil 600, preparation is made for welding the laminated foil 600, and the first pinch roller 210 and the second pinch roller 220 rotate to drive the laminated foil 600 to horizontally move.

The control module controls the first welding mechanism 300 to operate to weld the first foil 610 and the second foil 620 to two opposite surfaces of the composite foil 630, respectively. Wherein the active rolling tool 310 is located above the laminated foil 600, and the active rolling tool 310 welds the top surface of the laminated foil 600. The driven rolling head 321 is located below the laminated foil 600, and the driven rolling head 321 welds the top surface of the laminated foil 600. The first foil 610 and the second foil 620 can be welded on two opposite surfaces of the composite foil 630 respectively by the mutual matching of the driving rolling welding head 310 and the driven rolling welding head 321, and the welding between the first foil 610 and the composite foil 630 and the welding between the second foil 620 and the composite foil 630 are performed simultaneously, so that the welding efficiency and quality are improved.

The tab feed mechanism 700 operates to transport the tab 800 to the tab welding station. The tab in-place detection mechanism detects whether the tab 800 reaches the tab welding station in real time, and when the tab in-place detection mechanism detects that the tab 800 reaches the tab welding station, the control module controls the final welding driving part 420 to operate so as to drive the final welding head to move downwards, so that the laminated foil 600 and the tab 800 are welded. After the welding is completed, the winding mechanism 500 is used for winding the tab assembly welded by the second welding mechanism 400.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A tab welding device, comprising:

the unwinding mechanism comprises a first unwinding assembly, a second unwinding assembly and a third unwinding assembly, wherein the first unwinding assembly is used for unwinding a first foil, the second unwinding assembly is used for unwinding a second foil, the third unwinding assembly is used for unwinding a composite foil, and the first unwinding assembly, the second unwinding assembly and the third unwinding assembly are used for sequentially laminating the first foil, the composite foil and the second foil to form a laminated foil;

the pressing mechanism comprises a first pressing wheel and a second pressing wheel which are oppositely arranged, and the first pressing wheel and the second pressing wheel are mutually matched for pressing the laminated foil;

the first welding mechanism is arranged at the downstream of the pressing mechanism and is used for respectively welding the first foil and the second foil to two opposite surfaces of the composite foil;

the second welding mechanism is used for welding the laminated foil welded by the first welding mechanism to a tab to form a tab assembly;

and the winding mechanism is used for winding the tab assembly welded by the second welding mechanism.

2. The tab welding device according to claim 1, wherein an extrusion passage for extruding the laminated foil is formed between the first pressing wheel and the second pressing wheel, and the pressing mechanism further includes a pressing wheel driving part for driving the first pressing wheel and the second pressing wheel to rotate synchronously.

3. The tab welding device according to claim 1, further comprising a pressure detecting mechanism for detecting a welding pressure applied vertically by the first welding mechanism to the laminated foil.

4. The tab welding device according to claim 3, further comprising a synchronous sensing mechanism, wherein the first unwinding assembly, the second unwinding assembly and the third unwinding assembly each include an unwinding roller and an unwinding driving portion for driving the unwinding roller to rotate, and the synchronous sensing mechanism is configured to sense whether the unwinding rollers of the first unwinding assembly, the second unwinding assembly and the third unwinding assembly rotate synchronously.

5. The tab welding device according to claim 4, further comprising a control module, wherein the control module is in communication connection with the synchronous sensing mechanism and the pressure detection mechanism, and is in control connection with the unwinding driving portion and the first welding mechanism.

6. The tab welding device according to claim 1, wherein the first welding mechanism includes a driving bonding tool, a driven bonding tool, and a tool driving part for driving the driving bonding tool to rotate, the driving bonding tool is disposed opposite to the driven bonding tool, and a first welding channel for welding the laminated foil is formed between the driving bonding tool and the driven bonding tool.

7. The tab welding device according to claim 5, further comprising a tab feeding mechanism, wherein the tab feeding mechanism is disposed corresponding to the second welding mechanism, and the tab feeding mechanism is configured to transport the tab to a tab welding station.

8. The tab welding device according to claim 7, wherein the second welding mechanism includes a final welding head and a final welding driving unit for driving the final welding head to move up and down, and a second welding passage for welding the laminated foil and the tab is formed between the final welding head and the tab feeding mechanism.

9. The tab welding device according to claim 8, further comprising a tab in-place detection mechanism, wherein the tab in-place detection mechanism is used for detecting whether the tab reaches the tab welding station, the tab in-place detection mechanism is in communication connection with the control module, and the control module is in connection control with the final welding driving part.

10. The tab welding device according to claim 1, wherein the first unwinding assembly and the second unwinding assembly are symmetrically arranged, the third unwinding assembly is arranged between the first unwinding assembly and the second unwinding assembly in a first direction, the third unwinding assembly is spaced from the first unwinding assembly and the second unwinding assembly in a second direction, and the first direction intersects with the second direction.

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