Roll welding mechanism for composite current collector tab material
By using a combination of support rollers and pressure rollers in the roll welding mechanism of composite current collector tab materials, the problem of uneven deformation in the welding area is solved, achieving flatness and high bonding strength after welding.
Patent Information
- Application Number
- CN202520267295.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In the prior art, the welding area of composite current collectors is prone to uneven deformation during the welding process, which affects the shape of the electrode tab.
The support roller provides upward support force, and the first and second pressure rollers provide downward pressure, so that the diaphragm area of the composite current collector is covered on the support roller, forming a certain wrap angle, which suppresses thermal expansion deformation during welding.
The welded products are smoother and have better bonding, which improves welding precision and production capacity.
Smart Images
Figure CN223684608U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of mechanical equipment, especially relates to the roll welding mechanism of composite current collector tab material. BACKGROUND
[0002] The composite current collector is generally composed of a high polymer material layer and metal layers on both sides of the high polymer material layer, and the membrane area of the composite current collector is provided with a coating layer, and the welding area is provided with a metal film corresponding to the metal layer. In the prior art, the composite current collector and a pair of metal films are conveyed to the feed gap between the upper roll welding shaft and the lower roll welding shaft through a guide shaft to achieve the purpose of welding. However, due to the fact that the pair of metal films are not completely consistent in heating, the composite current collector is subjected to stress action of thermal deformation during the expansion and cooling process, so that the tab after welding is deformed unevenly on the welding area of the composite current collector, which affects the appearance of the tab during the subsequent tab cutting. SUMMARY
[0003] The utility model discloses a roll welding mechanism of composite current collector tab material, which aims to solve the technical problem of uneven deformation of the welding area of the composite current collector in the welding process of the prior art.
[0004] To achieve the above-mentioned purpose, the roll welding mechanism of the composite current collector tab material provided by the utility model embodiment comprises a rack, an upper roll welding shaft and a lower roll welding shaft arranged on the rack, a feed gap formed between the upper roll welding shaft and the lower roll welding shaft, a rotatable supporting roller arranged on the front side of the rack, a first rotatable pressing roller arranged at the feed end, and a second rotatable pressing roller arranged at the discharge end. The supporting roller is located at the free end of the lower roll welding shaft, acts on the bottom surface of the composite current collector and provides upward supporting force, the first pressing roller and the second pressing roller act on the top surface of the composite current collector and provide downward pressure respectively, and the composite current collector can be wrapped on the upper top part of the supporting roller.
[0005] Optionally, the axis of the lower roll welding shaft and the axis of the supporting roller are offset in the axial direction, and the circumferential edge of the longitudinal section of the lower roll welding shaft is tangent to the circumferential edge of the longitudinal section of the supporting roller.
[0006] Optionally, the radius of the lower roll welding shaft is a, the radius of the supporting roller is b, and a:b = 1:4.2~4.3.
[0007] Optionally, the assembly base is further arranged on the front side of the rack, and the top end of the assembly base is rotatably connected to the end of the supporting roller through a bearing.
[0008] Optionally, the assembling base is provided with a first drive, an output end of the first drive is in transmission connection with the supporting roller, the rack is provided with a second drive, an output end of the second drive is in transmission connection with the lower rolling welding shaft, and the walking speed of the supporting roller is same with the walking speed of the lower rolling welding shaft.
[0009] Optionally, the first drive is a first servo motor arranged on the assembling base, an output shaft of the first servo motor is provided with a first synchronous wheel, an end of the supporting roller is provided with a second synchronous wheel, and the second synchronous wheel is in transmission connection with the first synchronous wheel through a synchronous belt.
[0010] Optionally, the second drive is a second servo motor arranged on the rack, an output shaft of the second servo motor is provided with a third synchronous wheel, an end of the lower rolling welding shaft is provided with a fourth synchronous wheel, and the fourth synchronous wheel is in transmission connection with the third synchronous wheel through a synchronous belt.
[0011] Optionally, the rack is provided with a left wall plate at the feeding end and a right wall plate at the discharging end, the first compression roller is rotatably arranged on the left wall plate, and the second compression roller is rotatably arranged on the right wall plate.
[0012] Optionally, the left wall plate is further provided with a first guide roller and a second guide roller which are rotatable, the first guide roller is located above the first compression roller and acts on the positive metal film, and the second guide roller is located below the first compression roller and acts on the negative metal film.
[0013] Optionally, the rack comprises a bottom plate and a sliding seat, the upper rolling welding shaft and the lower rolling welding shaft are arranged on the sliding seat respectively, the top of the bottom plate is provided with a guide rail, the bottom plate of the sliding seat is provided with a sliding block which is in sliding cooperation with the guide rail, and the sliding seat can drive the lower rolling welding shaft to move along the axial direction relative to the supporting roller.
[0014] The rolling welding mechanism of the composite current collector tab material provided by the embodiment of the utility model has at least one of the following technical effects: the supporting roller provides upward supporting force for the film area of the composite current collector, so that the composite current collector has a relatively fixed supporting effect in the welding process, and the first compression roller and the second compression roller provide downward pressure for the composite current collector, so that the film area of the composite current collector is covered on the top of the supporting roller, the welding area of the composite current collector and the pair of metal films form a certain wrap angle on the lower rolling welding shaft through the aforementioned covering and shaping, the wrap angle can inhibit thermal expansion deformation in the welding moment, and the product after welding is more flat and has better bonding force. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0016] Fig. 1 The isometric view of the roll welding mechanism of the composite current collector tab material provided in the embodiments of the present application.
[0017] Fig. 2 The front view of the roll welding mechanism of the composite current collector tab material provided in the embodiments of the present application.
[0018] Fig. 3 The sectional view of the composite current collector tab material.
[0019] In the drawings, various reference signs represent:
[0020] 10 - rack 20 - assembly base 40 - tab
[0021] 11 - upper roll welding shaft 12 - lower roll welding shaft 13 - bottom plate
[0022] 14 - sliding seat 15 - sliding block 16 - guide rail
[0023] 21 - supporting roller 22 - first drive 31 - first compression roller
[0024] 32 - second compression roller 33 - first guide roller 34 - second guide roller
[0025] 41 - composite current collector 42 - diaphragm area 43 - welding area
[0026] 44 - positive metal film 45 - negative metal film. DETAILED DESCRIPTION
[0027] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.
[0028] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the convenience of describing the embodiments of the present application and simplifying the 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 cannot be understood as a limitation of the present application.
[0029] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0030] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0031] In one embodiment of the present application, as Figs. 1-3As shown, the rolling welding mechanism for providing the composite current collector 41 tab material comprises a rack 10, an upper rolling welding shaft 11 and a lower rolling welding shaft 12 arranged on the rack 10, a through-feeding gap formed between the upper rolling welding shaft 11 and the lower rolling welding shaft 12, a rotatable supporting roller 21 arranged on the front side of the rack 10, a rotatable first pressing roller 31 arranged on the feeding end of the rack 10, and a rotatable second pressing roller 32 arranged on the discharging end of the rack 10, wherein the supporting roller 21 is located at the free end of the lower rolling welding shaft 12, acts on the bottom surface of the composite current collector 41 and provides an upward supporting force, the first pressing roller 31 and the second pressing roller 32 respectively act on the top surface of the composite current collector 41 and provide downward pressing force, and the composite current collector 41 is wrapped on the upper top portion of the supporting roller 21. During welding, the supporting shaft acts on the bottom surface of the diaphragm area 42 of the composite current collector 41, the lower rolling welding shaft 12 indirectly acts on the bottom surface of the welding area 43 of the composite current collector 41 through the negative metal film 45, the upper rolling welding shaft 11 indirectly acts on the top surface of the welding area 43 of the composite current collector 41 through the positive metal film 44, and the first pressing roller 31 and the second pressing roller 32 respectively act on the top surface of the composite current collector 41 (the diaphragm area 42 and the welding area 43), thereby providing downward pressing force for the composite current collector 41, so that the diaphragm area 42 of the composite current collector 41 is wrapped on the upper top portion of the supporting roller 21, the welding area 43 of the composite current collector 41 and the pair of metal diaphragms form a certain wrapping angle on the lower rolling welding shaft 12 through the aforementioned wrapping and shaping, the wrapping angle can inhibit thermal expansion deformation at the moment of welding, and the product after welding is more flat and has better bonding force.
[0032] In an embodiment of the present application, as shown in Fig. 2 the axial center of the lower rolling welding shaft 12 is dislocated from the axial center of the supporting roller 21 in the axial direction, and the circumferential edge of the longitudinal section of the lower rolling welding shaft 12 is tangent to the circumferential edge of the longitudinal section of the supporting roller 21. The radius of the lower rolling welding shaft 12 is a, the radius of the supporting roller 21 is b, and a:b = 1:4.2-4.3. Specifically, a:b = 1:4.25. The above technical solution increases the contact area of the supporting roller 21 and the diaphragm area 42 of the composite current collector 41, which is beneficial to improve the supporting strength.
[0033] In an embodiment of the present application, as shown in Fig. 1As shown, the assembly base 20 is located at the front side of the rack 10, and the top end of the assembly base 20 is rotationally matched with the end of the supporting roller 21 through a bearing. The assembly base 20 is provided with a first drive 22, and the output end of the first drive 22 is in transmission connection with the supporting roller 21. The rack 10 is provided with a second drive, and the output end of the second drive is in transmission connection with the lower roll welding shaft 12. The running speed of the supporting roller 21 is the same as the running speed of the lower roll welding shaft 12. Specifically, the first drive 22 is used to provide the running line speed of the supporting roller 21 with active rotation, so as to reduce the tension fluctuation caused by the change of the roll of the composite current collector 41 in the conveying process. On the other hand, by controlling the running speeds of the first drive 22 and the second drive, the pole piece 40 (the composite current collector 41 welded with a pair of metal films) can be kept stationary relative to the roll welding shaft at the welding moment, so as to improve the welding precision and the bonding force, and reduce the deformation caused by the inconsistency between the running speed of the pole piece 40 (the composite current collector 41 welded with a pair of metal films) and the welding speed, which is beneficial to improving the welding speed and the production capacity.
[0034] In an embodiment of the present application, as shown in Fig. 1 The first drive 22 is a first servo motor arranged on the assembly base 20, the output shaft of the first servo motor is provided with a first synchronous wheel, the end of the supporting roller 21 is provided with a second synchronous wheel, and the second synchronous wheel is in transmission connection with the first synchronous wheel through a synchronous belt. The second drive is a second servo motor arranged on the rack 10, the output shaft of the second servo motor is provided with a third synchronous wheel, the end of the lower roll welding shaft 12 is provided with a fourth synchronous wheel, and the fourth synchronous wheel is in transmission connection with the third synchronous wheel through a synchronous belt. The structure is simple and convenient to assemble.
[0035] In an embodiment of the present application, as shown in Fig. 2 The left wall plate is arranged on the feeding end of the rack 10, the right wall plate is arranged on the discharging end, the first compression roller 31 is rotatably arranged on the left wall plate, and the second compression roller 32 is rotatably arranged on the right wall plate. The first guide roller 33 and the second guide roller 34 are also rotatably arranged on the left wall plate. The first guide roller 33 is located above the first compression roller 31 and acts on the positive metal film 44, and the second guide roller 34 is located below the first compression roller 31 and acts on the negative metal film 45.
[0036] In an embodiment of the present application, as shown in Fig. 1As shown, the rack 10 comprises a bottom plate 13 and a sliding seat 14, the upper roller welding shaft 11 and the lower roller welding shaft 12 are arranged on the sliding seat 14 respectively, the top of the bottom plate 13 is provided with a guide rail 16, the bottom plate 13 of the sliding seat 14 is provided with a sliding block 15 which is in sliding cooperation with the guide rail 16, and the sliding seat 14 can drive the lower roller welding shaft 12 to move along the axial direction relative to the supporting roller 21. Specifically, the bottom plate 13 is provided with a cavity, a lead screw is arranged in the cavity, the end of the lead screw is in rotary cooperation with the inner wall of the cavity through a bearing and is connected with a screw knob handle at the end away from the assembling base 20, the bottom of the sliding block 15 is connected with the lead screw through a lead screw nut, the sliding block 15 is driven to drive the lower roller welding shaft 12 to move along the axial direction relative to the supporting shaft by rotating the screw knob handle, and the maintenance of the lower roller welding shaft 12 is facilitated.
[0037] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A roll welding mechanism of composite current collector tab material, comprising a rack, an upper roll welding shaft and a lower roll welding shaft are arranged on the rack, and a feed gap is formed between the upper roll welding shaft and the lower roll welding shaft, characterized in that: The front side of the frame is provided with a rotatable supporting roller, the feeding end is provided with a rotatable first pressing roller, and the discharging end is provided with a rotatable second pressing roller.
2. The seam welding mechanism of a composite current collector tab material of claim 1, wherein: The axis of the lower rolling welding shaft and the axis of the supporting roller are staggered in the axial direction, and the circumferential edge of the longitudinal section of the lower rolling welding shaft is tangent to the circumferential edge of the longitudinal section of the supporting roller.
3. The seam welding mechanism of the composite current collector tab material of claim 1, wherein: The radius of the lower rolling welding shaft is a, and the radius of the supporting roller is b, and a:b = 1:4.2-4.
3.
4. The seam welding mechanism of a composite current collector tab material of claim 1, wherein: The assembly base is further arranged on the front side of the frame, and the top end of the assembly base is rotatably connected to the end of the supporting roller through a bearing.
5. The seam welding mechanism of a composite current collector tab material of claim 4, wherein: The first driving device is a first servo motor arranged on the assembly base, and the output shaft of the first servo motor is provided with a first synchronous wheel.
6. The seam welding mechanism of a composite current collector tab material of claim 5, wherein: The second driving device is a second servo motor arranged on the frame, and the output shaft of the second servo motor is provided with a third synchronous wheel.
7. The seam welding mechanism of the composite current collector tab material of claim 5, wherein: The feeding end of the frame is provided with a left wall plate, and the discharging end is provided with a right wall plate.
8. The seam welding mechanism of the composite current collector tab material of claim 1, wherein: The first pressing roller is rotatably arranged on the left wall plate, and the second pressing roller is rotatably arranged on the right wall plate.
9. The seam welding mechanism of composite current collector tab material of claim 8, wherein: The left wall plate is further provided with a first guide roller and a second guide roller, the first guide roller is arranged above the first pressing roller and acts on the positive electrode metal film, and the second guide roller is arranged below the first pressing roller and acts on the negative electrode metal film.
10. The seam welding mechanism of the composite current collector tab material of claim 8, wherein: The frame includes a bottom plate and a sliding seat, the upper rolling welding shaft and the lower rolling welding shaft are arranged on the sliding seat respectively, the top of the bottom plate is provided with a guide rail, the bottom plate of the sliding seat is provided with a sliding block which is slidably connected with the guide rail, and the sliding seat can drive the lower rolling welding shaft to move along the axial direction relative to the supporting roller.