Roll welding equipment for composite current collector tab material

Abstract

The utility model belongs to the technical field of mechanical equipment, and particularly relates to roll welding equipment for a composite current collector tab material, which comprises a first unwinding shaft, a second unwinding shaft, a third unwinding shaft, a welding mechanism and a winding shaft, a first traction mechanism acting on a composite current collector is arranged between the first unwinding shaft and the winding shaft, and a second traction mechanism acting on the composite current collector is arranged between the second unwinding shaft and the winding shaft. A second traction mechanism acting on the positive electrode metal film is arranged between the second unwinding shaft and the welding mechanism, and a third traction mechanism acting on the negative electrode metal film is arranged between the third unwinding shaft and the welding mechanism. The first traction mechanism provides traction force for the material belt of the composite current collector, the second traction mechanism provides traction force for the positive electrode metal film, and the third traction mechanism provides traction force for the negative electrode metal film, so that single-strand traction force provided by the unwinding shaft is changed into three-strand independent traction force, and the belt conveying speed of equipment can be increased to 80 meters per minute; and the productivity is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical equipment, and in particular relates to a roll welding equipment for composite current collector tab materials. Background Technology

[0002] Composite current collectors generally consist of a polymer material layer and metal layers located on both sides of the polymer material layer. The membrane area of ​​the composite current collector has a coating layer, and the welding area has a metal film corresponding to the aforementioned metal layers. In the prior art, a pair of metal films are fixed to the welding area of ​​the composite current collector by welding equipment to form an electrode with tabs. The material rolls are fixed by unwinding shafts corresponding to the composite current collector, the positive electrode metal film, and the negative electrode metal film. After the three material rolls pass through the welding equipment, they are fixed to the winding shaft to achieve composite and winding. However, this structure has the following shortcomings: the conveyor speed of the three material rolls is controlled by tension, and the tension is prone to fluctuation due to changes in the unwinding roll diameter during the conveyor process, resulting in irregular tensile forces on the welded electrode. In order to reduce the impact of this tensile force on the electrode, the conveyor speed of the equipment is generally lower than 30 meters / minute, thus limiting the production capacity. Utility Model Content

[0003] The purpose of this invention is to provide a roll welding equipment for composite current collector tab materials, aiming to solve the technical problem of low production capacity in the prior art.

[0004] To achieve the above objectives, the present invention provides a roll welding device for composite current collector tab materials, comprising a first unwinding shaft, a second unwinding shaft, a third unwinding shaft, a welding mechanism, and a take-up shaft. The welding mechanism acts on the welding area of ​​the composite current collector. A first traction mechanism acting on the composite current collector is provided between the first unwinding shaft and the take-up shaft. A second traction mechanism acting on the positive electrode metal film is provided between the second unwinding shaft and the welding mechanism. A third traction mechanism acting on the negative electrode metal film is provided between the third unwinding shaft and the welding mechanism. The conveyor speeds of the first traction mechanism, the second traction mechanism, and the third traction mechanism are the same as the conveyor speed of the welding mechanism.

[0005] Optionally, the welding mechanism includes an upper welding shaft and a lower welding shaft arranged opposite each other, and a gap is provided between the upper welding shaft and the lower welding shaft for the welding area of ​​the composite current collector, the positive electrode metal film and the negative electrode metal film to pass through.

[0006] Optionally, the first traction mechanism includes a first rotating shaft located beside the lower roller welding shaft, wherein the axis of the lower roller welding shaft is offset from the axis of the first rotating shaft, and the periphery of its cross-section is internally tangent to the periphery of the cross-section of the first rotating shaft, and the first rotating shaft can provide an upward supporting force for the membrane area of ​​the composite current collector.

[0007] Optionally, the second traction mechanism includes a sliding seat and a slider slidably connected to the sliding seat. The end of the sliding seat is provided with a driving wheel, and the slider is provided with a rotatable driven wheel. A gap is provided between the driven wheel and the driving wheel for the positive electrode metal film to pass through. The structure of the third traction mechanism is the same as that of the second traction mechanism.

[0008] Optionally, it further includes a first buffer mechanism disposed between the first unwinding mechanism and the first traction mechanism, a second buffer mechanism disposed between the second unwinding shaft and the second traction mechanism, a third buffer mechanism disposed between the third unwinding shaft and the third traction mechanism, and a fourth buffer mechanism disposed between the welding mechanism and the take-up shaft. The first buffer mechanism acts on the composite current collector, the second buffer mechanism acts on the positive electrode metal film, the third buffer mechanism acts on the negative electrode metal film, and the fourth buffer mechanism acts on the electrode sheet.

[0009] Optionally, the first buffer mechanism includes a swing seat and a swing rod movably connected to the swing seat. The free end of the swing rod is rotatably connected to a first roller. The structures of the second buffer mechanism, the third buffer mechanism, and the fourth buffer mechanism are the same as those of the first buffer mechanism.

[0010] Optionally, it may also include a first correction mechanism disposed between the second traction mechanism and the welding mechanism, and a second correction mechanism disposed between the third traction mechanism and the welding mechanism, wherein the first correction mechanism acts on the positive electrode metal film and the second correction mechanism acts on the negative electrode metal film.

[0011] Optionally, the first correction mechanism includes a mounting base, a movable bracket slidably connected to the mounting base, a photoelectric sensor, and a controller. The top of the movable bracket is provided with a third roller. The photoelectric sensor is used to detect whether the positive electrode metal film is deviated during the conveying process and is electrically connected to the controller. The controller can drive the movable bracket to move along the width direction of the positive electrode metal film according to the received electrical signal. The structure of the second correction mechanism is the same as that of the first correction mechanism.

[0012] Optionally, a shaping mechanism is also included, which is located between the welding mechanism and the winding shaft and includes an upper pressure roller and a lower pressure roller arranged opposite each other, with a gap between the upper pressure roller and the lower pressure roller for the electrode sheet to pass through.

[0013] Optionally, it also includes a photographing mechanism, which is disposed between the welding mechanism and the rewind shaft and includes a first CCD camera and a second CCD camera. The lens of the first CCD camera faces the top surface of the electrode and is used to take a picture of the welding area of ​​the positive electrode metal film welded to the composite current collector. The lens of the second CCD camera faces the bottom surface of the electrode and is used to take a picture of the welding area of ​​the negative electrode metal film welded to the composite current collector.

[0014] The composite current collector electrode material roll welding equipment provided in this utility model embodiment has at least one of the following technical effects: by providing traction force to the composite current collector strip through the first traction mechanism, the second traction mechanism provides traction force to the positive electrode metal film, and the third traction mechanism provides traction force to the negative electrode metal film, the single traction force provided by the unwinding shaft is changed into three independent traction forces, which helps to reduce the fluctuation of strip tension caused by the change of unwinding roll diameter during the tape running process. The tape running speed of the equipment can be increased to 80 meters / minute, thereby increasing the production capacity. Attached Figure Description

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

[0016] Figure 1 A schematic diagram of the structure of the roll welding equipment for composite current collector tab material provided in this embodiment of the utility model.

[0017] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 for Figure 1 A magnified view of a section at point B.

[0019] Figure 4 This is a cross-sectional view of the composite current collector tab material.

[0020] The following are the labeling elements in the figure:

[0021] 1—First unwinding spindle; 2—Second unwinding spindle; 3—Third unwinding spindle

[0022] 4—Welding mechanism; 5—Rewinding shaft; 6—First traction mechanism

[0023] 7—Second traction mechanism; 8—Third traction mechanism; 9—Electrode plate

[0024] 10—First Cache Structure 11—Second Cache Structure 12—Third Cache Structure

[0025] 13—Fourth Cache Mechanism 14—First Correction Mechanism 15—Second Correction Mechanism

[0026] 16—Surgery Unit 17—Photography Unit 18—Assembly Wall Panels

[0027] 101—Swing seat; 102—Swing rod; 103—First roller

[0028] 41—Upper roller welding shaft; 42—Lower roller welding shaft; 61—First rotating shaft

[0029] 71—Sliding seat; 72—Slider; 73—Driving wheel

[0030] 74—Driven wheel; 91—Composite current collector; 92—Diaphragm area

[0031] 93—Welding zone; 94—Positive electrode metal film; 95—Negative electrode metal film. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0036] In one embodiment of this utility model, such as Figures 1-4 As shown, a roll welding device for the tab material of a composite current collector 91 includes a first unwinding shaft 1, a second unwinding shaft 2, a third unwinding shaft 3, a welding mechanism 4, and a take-up shaft 5. The welding mechanism 4 acts on the welding area 93 of the composite current collector 91. A first traction mechanism 6 acting on the composite current collector 91 is provided between the first unwinding shaft 1 and the take-up shaft 5. A second traction mechanism 7 acting on the positive electrode metal film 94 is provided between the second unwinding shaft 2 and the welding mechanism. A third traction mechanism 8 acting on the negative electrode metal film 95 is provided between the third unwinding shaft 3 and the welding mechanism. The conveyor speeds of the first traction mechanism 6, the second traction mechanism 7, and the third traction mechanism 8 are the same as the conveyor speed of the welding mechanism 4. Specifically, the upper roll welding shaft 41 and the lower roll welding shaft 42 of the welding mechanism 4, the first rotating shaft 61 of the first traction mechanism 6, the drive wheel 73 of the second traction mechanism 7, and the drive wheel 73 of the third traction mechanism 8 are all driven by servo motors, and the speed accuracy of the servo motors can reach ±0.05%. It can make the error between welding speed and conveyor belt speed less than ±0.1%; it also includes an assembly wall plate 18, a first unwinding shaft 1, a second unwinding shaft 2, a third unwinding shaft 3, a welding mechanism 4 and a take-up shaft 5 respectively disposed on the assembly wall plate 18, and the assembly wall plate 18 is provided with a number of guide wheels for guiding the material strip. The material strips of the first unwinding shaft 1, the second unwinding shaft 2 and the third unwinding shaft 3 are respectively guided to the welding mechanism 4 by the three sets of guide wheels, and are combined by the welding mechanism 4 to form the electrode sheet 9 material strip, which is then guided to the take-up shaft 5 by the guide wheels.

[0037] In one embodiment of this utility model, such as Figure 2 As shown, the welding mechanism 4 includes an upper welding shaft 41 and a lower welding shaft 42 arranged opposite each other. A gap is provided between the upper welding shaft 41 and the lower welding shaft 42 for the welding area 93, the positive electrode metal film 94, and the negative electrode metal film 95 of the composite current collector 91 to pass through. Specifically, the welding mechanism 4 also includes an upper mounting base and a lower mounting base. The upper welding shaft 41 is rotatably connected to the upper mounting base, and the lower welding shaft 42 is rotatably connected to the lower mounting base.

[0038] In one embodiment of this utility model, such as Figure 2 As shown, the first traction mechanism 6 includes a first rotating shaft 61 located beside the lower roller welding shaft 42. The axis of the lower roller welding shaft 42 is offset from the axis of the first rotating shaft 61, and the periphery of its cross-section is internally tangent to the periphery of the cross-section of the first rotating shaft 61. The first rotating shaft 61 can provide an upward supporting force for the diaphragm region 92 of the composite current collector 91. Specifically, it also includes a first mounting base, the bottom of which is connected to the mounting wall plate 18. A first rotating shaft 61 is rotatably mounted on the top of the first mounting base and located at the end of the lower roller welding shaft 42 away from the mounting wall plate 18. The axis of the lower roller welding shaft 42 and the axis of the first rotating shaft 61 are vertically offset and parallel to each other. The circular periphery of the cross-section of the lower roller welding shaft 42 is internally tangent to the circular periphery of the cross-section of the first rotating shaft 61. Thus, the lower roller welding shaft 42 provides an upward support force for the welding area 93 of the composite current collector 91, and the first rotating shaft 61 provides an upward support force for the diaphragm area 92 of the composite current collector 91. As a result, the electrode 9 has a relatively fixed supporting force at the moment of welding, which can suppress the amount of thermal deformation caused by the heat generated at the moment of welding to the electrode 9.

[0039] In one embodiment of this utility model, such as Figure 3 As shown, the second traction mechanism 7 includes a sliding seat 71 and a slider 72 slidably connected to the sliding seat 71. The end of the sliding seat 71 is provided with a driving wheel 73, and the slider 72 is provided with a rotatable driven wheel 74. A gap is provided between the driven wheel 74 and the driving wheel 73 for the positive electrode metal film 94 to pass through. The structure of the third traction mechanism 8 is the same as that of the second traction mechanism 7. Specifically, the sliding seat 71 is fixed to the mounting wall plate 18 and is provided with a cylinder for driving the slider 72 to slide back and forth. The cylinder widens the gap between the driving wheel 73 and the driven wheel 74, facilitating the initial material preparation and threading work.

[0040] In one embodiment of this utility model, such as Figure 1 As shown, the system also includes a first buffer mechanism 10 located between the first unwinding mechanism 6 and the first traction mechanism 6, a second buffer mechanism 11 located between the second unwinding shaft 2 and the second traction mechanism 7, a third buffer mechanism 12 located between the third unwinding shaft 3 and the third traction mechanism 8, and a fourth buffer mechanism 13 located between the welding mechanism 4 and the take-up shaft 5. The first buffer mechanism 10 acts on the composite current collector 91, the second buffer mechanism 11 acts on the positive electrode metal film 94, the third buffer mechanism 12 acts on the negative electrode metal film 95, and the fourth buffer mechanism 13 acts on the electrode sheet 9. This helps to buffer tension fluctuations caused by changes in the unwinding diameter.

[0041] In one embodiment of this utility model, such as Figure 1As shown, the first buffer mechanism 10 includes a swing seat 101 and a swing rod 102 movably connected to the swing seat 101. The free end of the swing rod 102 is rotatably connected to a first roller 103. The structures of the second buffer mechanism 11, the third buffer mechanism 12, and the fourth buffer mechanism 13 are the same as those of the first buffer mechanism 10. Specifically, the swing seat 101 is mounted on the mounting wall panel 18. One end of the swing seat 101 is provided with a cylinder, and the other end is provided with a hinge point. The middle part of the swing rod 102 is connected to the hinge point on the hinge seat, the top is connected to the piston rod of the cylinder, and the bottom is connected to the first roller 103. In this embodiment, there is a pair of swing rods 102.

[0042] In one embodiment of this utility model, such as Figure 1 As shown, the system also includes a first alignment mechanism 14 located between the second traction mechanism 7 and the welding mechanism 4, and a second alignment mechanism 15 located between the third traction mechanism 8 and the welding mechanism 4. The first alignment mechanism 14 acts on the positive electrode metal film 94, and the second alignment mechanism 15 acts on the negative electrode metal film 95. By using the alignment mechanisms to act on the material strips during the conveying process, the various material strips can be aligned during welding, which is beneficial to improving production quality.

[0043] In one embodiment of this utility model, such as Figure 1 As shown, the first correction mechanism 14 includes a mounting base, a movable support slidably connected to the mounting base, a photoelectric sensor, and a controller. A third roller is provided on the top of the movable support. The photoelectric sensor is used to detect whether the positive electrode metal film 94 deviates during transport and is electrically connected to the controller. The controller can drive the movable support to move along the width direction of the positive electrode metal film 94 according to the received electrical signal. The structure of the second correction mechanism 15 is the same as that of the first correction mechanism 14. Specifically, the first correction mechanism 14, the second correction mechanism 15, and the third correction mechanism all adopt a servo correction integrated machine.

[0044] In one embodiment of this utility model, such as Figure 1 As shown, it also includes a shaping mechanism 16, which is located between the welding mechanism 4 and the winding shaft 5. The shaping mechanism 16 includes an upper pressure roller and a lower pressure roller arranged opposite each other, with a gap between the upper and lower pressure rollers for the electrode sheet 9 to pass through. This helps improve the flatness of the electrode sheet 9.

[0045] In one embodiment of this utility model, such as Figure 1As shown, it also includes a photographing mechanism 17, which is located between the welding mechanism 4 and the rewind shaft 5. The photographing mechanism 17 includes a first CCD camera and a second CCD camera. The lens of the first CCD camera faces the top surface of the electrode 9 and is used to photograph the welding area 93 of the composite current collector 91 where the positive electrode metal film 94 is welded. The lens of the second CCD camera faces the bottom surface of the electrode 9 and is used to photograph the welding area 93 of the composite current collector 91 where the negative electrode metal film 95 is welded. The relative position information of the positive electrode metal film 94 in the welding area 93 is obtained using the first CCD camera, and the relative position information of the negative electrode metal film 95 in the welding area 93 is obtained using the second CCD camera, facilitating subsequent inspection and comparison work.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A roll welding equipment for composite current collector tab materials, characterized in that: The device includes a first unwinding shaft, a second unwinding shaft, a third unwinding shaft, a welding mechanism, and a take-up shaft. The welding mechanism acts on the welding area of ​​the composite current collector. A first traction mechanism acting on the composite current collector is provided between the first unwinding shaft and the take-up shaft. A second traction mechanism acting on the positive electrode metal film is provided between the second unwinding shaft and the welding mechanism. A third traction mechanism acting on the negative electrode metal film is provided between the third unwinding shaft and the welding mechanism. The conveyor speeds of the first traction mechanism, the second traction mechanism, and the third traction mechanism are the same as the conveyor speed of the welding mechanism.

2. The roll welding equipment for composite current collector tab material according to claim 1, characterized in that: The welding mechanism includes an upper welding shaft and a lower welding shaft arranged opposite each other. A gap is provided between the upper welding shaft and the lower welding shaft for the welding area of ​​the composite current collector, the positive electrode metal film and the negative electrode metal film to pass through.

3. The roll welding equipment for composite current collector tab materials according to claim 2, characterized in that: The first traction mechanism includes a first rotating shaft located beside the lower roller welding shaft. The axis of the lower roller welding shaft is offset from the axis of the first rotating shaft, and the periphery of its cross-section is internally tangent to the periphery of the cross-section of the first rotating shaft. The first rotating shaft can provide an upward support force for the membrane area of ​​the composite current collector.

4. The roll welding equipment for composite current collector tab materials according to claim 1, characterized in that: The second traction mechanism includes a sliding seat and a slider slidably connected to the sliding seat. The end of the sliding seat is provided with a driving wheel, and the slider is provided with a rotatable driven wheel. A gap is provided between the driven wheel and the driving wheel for the positive electrode metal film to pass through. The structure of the third traction mechanism is the same as that of the second traction mechanism.

5. The roll welding equipment for composite current collector tab materials according to claim 1, characterized in that: It also includes a first buffer mechanism disposed between the first unwinding mechanism and the first traction mechanism, a second buffer mechanism disposed between the second unwinding shaft and the second traction mechanism, a third buffer mechanism disposed between the third unwinding shaft and the third traction mechanism, and a fourth buffer mechanism disposed between the welding mechanism and the take-up shaft. The first buffer mechanism acts on the composite current collector, the second buffer mechanism acts on the positive electrode metal film, the third buffer mechanism acts on the negative electrode metal film, and the fourth buffer mechanism acts on the electrode sheet.

6. The roll welding equipment for composite current collector tab material according to claim 5, characterized in that: The first buffer mechanism includes a swing base and a swing rod movably connected to the swing base. The free end of the swing rod is rotatably connected to a first roller. The structures of the second buffer mechanism, the third buffer mechanism, and the fourth buffer mechanism are the same as those of the first buffer mechanism.

7. The roll welding equipment for composite current collector tab materials according to claim 1, characterized in that: It also includes a first correction mechanism disposed between the second traction mechanism and the welding mechanism, and a second correction mechanism disposed between the third traction mechanism and the welding mechanism. The first correction mechanism acts on the positive electrode metal film, and the second correction mechanism acts on the negative electrode metal film.

8. The roll welding equipment for composite current collector tab material according to claim 7, characterized in that: The first correction mechanism includes a mounting base, a movable bracket slidably connected to the mounting base, a photoelectric sensor, and a controller. The top of the movable bracket is provided with a third roller. The photoelectric sensor is used to detect whether the positive electrode metal film is deviated during the conveying process and is electrically connected to the controller. The controller can drive the movable bracket to move along the width direction of the positive electrode metal film according to the received electrical signal. The structure of the second correction mechanism is the same as that of the first correction mechanism.

9. The roll welding equipment for composite current collector tab materials according to claim 1, characterized in that: It also includes a shaping mechanism, which is located between the welding mechanism and the winding shaft and includes an upper pressure roller and a lower pressure roller arranged opposite each other, with a gap between the upper pressure roller and the lower pressure roller for the electrode sheet to pass through.

10. The roll welding equipment for composite current collector tab material according to claim 1, characterized in that: It also includes a photographing mechanism, which is located between the welding mechanism and the take-up shaft. The photographing mechanism includes a first CCD camera and a second CCD camera. The lens of the first CCD camera faces the top surface of the electrode sheet and is used to take a picture of the welding area of ​​the positive electrode metal film welded to the composite current collector. The lens of the second CCD camera faces the bottom surface of the electrode sheet and is used to take a picture of the welding area of ​​the negative electrode metal film welded to the composite current collector.

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