Active welding roller structure

Abstract

The application discloses an active type welding roller structure applied to an ultrasonic rolling welding mechanism, which comprises a welding roller for supporting a welding part of A face foil, composite current collector and B face foil, a composite current collector passing roller for supporting a main body of the composite current collector, a welding shaft core and a welding roller driving motor, the welding roller and the composite current collector passing roller are arranged side by side, the output shaft of the welding roller driving motor is connected with the welding shaft core, the welding roller is detachably sleeved on the welding shaft core and can synchronously rotate with the welding shaft core, and the composite current collector passing roller is sleeved on the welding shaft core and can rotate along the welding shaft core. The active type welding roller structure can effectively solve the welding deviation problem and improve the welding quality and welding speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery, in particular to an active type welding roller structure. BACKGROUND

[0002] In the production process of lithium battery, metal foil is usually selected as the current collector, among which aluminum foil is selected as the positive current collector and copper foil is selected as the negative current collector. In order to improve the energy density and safety of the battery, a composite current collector obtained by compounding a high polymer film and a metal plating layer has gradually attracted attention. However, since the composite current collector includes an insulating layer formed of a high polymer material, the tab of the composite current collector cannot output the current in the battery cell to the electrode terminal, which requires the use of foil (aluminum foil or copper foil) to switch with the tab of the composite current collector so as to deliver the current in the battery cell.

[0003] A Chinese invention patent with publication number CN108393573A discloses an ultrasonic wave rolling welding machine, which comprises a main frame bottom plate, a vertical frame fixed on the main frame bottom plate, a main shaft system comprising an ultrasonic wave welding head, an amplitude modulator and a transducer, an anvil device comprising an anvil ring, an upper frame body, a lower frame body and a driving device. The ultrasonic wave welding head and the anvil ring are arranged in the center; the upper frame body is used for installing the first side of the main shaft system and the anvil device; the lower frame body is used for installing the second side of the main shaft system and the anvil device; and the driving device is installed on the main frame bottom plate and used for driving the lower frame body to move up and down. The ultrasonic wave rolling welding machine realizes continuous welding on the workpiece through the cooperation of the main shaft system and the anvil device.

[0004] However, since the thickness of the A-face foil, the B-face foil and the tab end of the composite current collector after being overlapped may be different from the thickness of the main body of the composite current collector, the ultrasonic wave rolling welding machine of the above-mentioned scheme adopts an anvil as the welding support, and the support surface height of the anvil is consistent. If the thickness of the A-face foil, the B-face foil and the tab end of the composite current collector after being overlapped is different from the thickness of the main body of the composite current collector, the tension and friction force generated on one side of the A-face foil, the B-face foil and the tab end of the composite current collector after being overlapped and one side of the main body of the composite current collector will be different (i.e. the stress is different), which will cause the welding to deviate easily and affect the welding quality. SUMMARY

[0005] In order to overcome the problem that in the existing ultrasonic wave rolling welding machine, the welding anvil has a consistent support surface height, and if the thickness of the A-face foil, the B-face foil and the tab end of the composite current collector after being overlapped is different from the thickness of the main body of the composite current collector, the welding will deviate easily and affect the welding quality, the present application provides an active type welding roller structure.

[0006] The technical scheme of the present application is as follows:

[0007] The application discloses an active welding roller structure applied to an ultrasonic rolling welding mechanism, which comprises a welding roller for supporting an A-face foil, a composite current collector and a welding part of a B-face foil, a composite current collector passing roller for supporting a main body of the composite current collector, a welding shaft core and a welding roller driving motor, the welding roller and the composite current collector passing roller are arranged side by side, the output shaft of the welding roller driving motor is connected with the welding shaft core, the welding roller is detachably sleeved on the welding shaft core and can synchronously rotate with the welding shaft core, and the composite current collector passing roller is sleeved on the welding shaft core and can rotate along the welding shaft core.

[0008] According to the active welding roller structure, the height difference between the highest point of the welding roller and the highest point of the composite current collector passing roller is equal to half of the thickness of the main body of the composite current collector minus the thickness of the B-face foil.

[0009] According to the active welding roller structure, the connecting part of the welding roller and the welding shaft core is provided with a welding roller seat, the welding roller seat is sleeved outside the welding shaft core and is fixed with the welding shaft core, the welding roller is sleeved outside the welding roller seat and is fixed with the welding roller seat, and the inner side of the welding roller seat is located inside the composite current collector passing roller.

[0010] Further, the outer side of the welding roller is provided with a tab seat, the tab seat, the welding roller and the welding roller seat are fixed together through screws, and the outer diameter of the tab seat is the same as the outer diameter of the welding roller.

[0011] Further, the tab seat is circumferentially provided with a plurality of first screw holes, the welding roller is circumferentially provided with a plurality of second screw holes corresponding to the first screw holes, and the inner side of the welding roller seat is circumferentially provided with a plurality of third screw holes corresponding to the first screw holes, and the tab seat, the welding roller and the welding roller seat are fixed together through screws passing through the corresponding first screw holes, second screw holes and third screw holes.

[0012] According to the active welding roller structure, the connecting part of the composite current collector passing roller and the welding shaft core is provided with a bearing, and the composite current collector passing roller is sleeved on the welding shaft core through the bearing.

[0013] Further, the outer ring of the bearing is connected with the composite current collector passing roller through a bearing adapter block, and the inner ring of the bearing is connected with the welding shaft core.

[0014] Further, the active welding roller structure further comprises a speed reducer and a shaft coupling, the output shaft of the welding roller driving motor is connected with one end of the speed reducer, and the other end of the speed reducer is connected with the welding shaft core through the shaft coupling.

[0015] Further, two ends of the welding shaft core are respectively provided with welding shaft bearing seats for supporting the welding shaft core.

[0016] Further, a bearing wheel assembly is arranged below the welding wheel, and the bearing wheel assembly comprises a bearing base and two bearing wheels rotatably arranged on the bearing base, and wheel surfaces of the two bearing wheels are respectively in contact with two sides of the lower wheel surface of the welding wheel.

[0017] Further, the wheel surface width of the bearing wheel is consistent with the wheel surface width of the welding wheel.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. By arranging the welding wheel and the composite current collector roller side by side, the welding wheel is used to support the welding part of the A-side foil, the composite current collector and the B-side foil, and the composite current collector roller is used to support the main body of the composite current collector, so that the tension and friction force generated on one side of the A-side foil, the B-side foil and the tab end of the composite current collector after being overlapped with one side of the main body of the composite current collector during the welding process are the same, the welding deviation problem can be effectively solved, and the welding quality and welding speed are improved.

[0020] 2. By arranging the welding wheel driving motor and the welding shaft core, the linear speed of the welding wheel is the same as the conveying speed of the A-side foil, the composite current collector and the B-side foil, so that the resistance of the A-side foil, the composite current collector and the B-side foil entering the ultrasonic rolling welding mechanism is reduced, and the welding quality is improved.

[0021] 3. Since the welding wheel is detachably arranged on the welding shaft core, different diameter welding wheels can be replaced according to the thickness of the A-side foil, the B-side foil and the composite current collector, so as to adjust the height difference between the highest point of the welding wheel and the highest point of the composite current collector roller. BRIEF DESCRIPTION OF DRAWINGS

[0022] 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 other drawings can also be obtained by those skilled in the art without any creative effort.

[0023] Figure 1 is a structural schematic view of the present application;

[0024] Figure 2 is a front view of the present application;

[0025] Figure 3 is Figure 2 is a sectional view of K-K in FIG. 1;

[0026] Figure 4 Figure 1 is a structural schematic diagram of the load wheel assembly in the present application.

[0027] In the drawings,

[0028] 1, welding wheel; 2, composite current collector roller; 3, welding wheel driving motor; 4, welding shaft core; 5, speed reducer; 6, shaft coupling; 7, welding wheel seat; 8, tab seat; 9, bearing; 10, bearing adapter block; 11, welding bearing seat; 12, load wheel assembly; 121, load base; 122, load wheel. DETAILED DESCRIPTION

[0029] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in combination with the drawings and examples. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, it is declared that the following described examples are only for explaining the present application, and are not used to limit the present application.

[0030] It should be noted that the terms "mounting", "setting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited.

[0031] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly placed when the product of the application is used, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of convenience, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0032] Please refer to Figures 1 to 3The embodiment provides a kind of active type of welding roller structure, it is applied to ultrasonic wave rolling welding mechanism, including welding wheel 1 and composite current collector roller 2 that are side by side together, welding wheel 1 is located in the welding wheel of ultrasonic wave rolling welding mechanism directly below, welding wheel 1 is used to support the welding part of A face foil, composite current collector and B face foil, composite current collector roller 2 is used to support the main body of composite current collector, and the height difference between the highest point of welding wheel 1 and the highest point of composite current collector roller 2 is equal to the half of the thickness of the main body of composite current collector minus the thickness of B face foil.Since the thickness of A face foil, B face foil and the tab end of composite current collector after superposition can be different from the thickness of the main body of composite current collector, if the height of welding support surface is consistent, and the thickness of A face foil, B face foil and the tab end of composite current collector after superposition is different from the thickness of the main body of composite current collector, it will cause the tension and friction force of one side of A face foil, B face foil and the tab end of composite current collector after superposition and one side of the main body of composite current collector to be different (i.e. force is different), welding is easy to deviate, affect welding quality.Through the welding wheel 1 and composite current collector roller 2 of the above setting, it can guarantee that the tension and friction force of one side of A face foil, B face foil and the tab end of composite current collector after superposition and one side of the main body of composite current collector is the same, can effectively solve the problem of welding deviation, improve welding quality and welding speed.

[0033] In the embodiment, the active type of welding roller structure further includes welding wheel driving motor 3, welding shaft core 4, speed reducer 5 and coupling 6, the output shaft of welding wheel driving motor 3 is connected with one end of speed reducer 5, the other end of speed reducer 5 is connected with welding shaft core 4 through coupling 6, welding wheel 1 can be detachably set on welding shaft core 4 and can rotate synchronously with welding shaft core 4, composite current collector roller 2 is set on welding shaft core 4 and can rotate along welding shaft core 4. Among them, the linear speed of welding wheel 1 is the same as the conveying speed of A face foil, composite current collector and B face foil, which can reduce the resistance of A face foil, composite current collector and B face foil into ultrasonic wave rolling welding mechanism, and in the welding process, A face foil, composite current collector and B face foil will not be subjected to strong pulling due to the conveying speed being excessively less than the linear speed of welding wheel 1, or will not appear wrinkle due to the conveying speed being excessively greater than the linear speed of welding wheel 1, improve welding quality. Since welding wheel 1 can be detachably set on welding shaft core 4, different diameter welding wheel 1 can be replaced according to the thickness of A face foil, B face foil and composite current collector, so as to adjust the height difference between the highest point of welding wheel 1 and the highest point of composite current collector roller 2, thereby guaranteeing welding quality.

[0034] Please refer to Figure 2 , Figure 3Further, the connecting part of the welding wheel 1 and the welding shaft core 4 is provided with a welding wheel seat 7, the welding wheel seat 7 is sleeved on the outside of the welding shaft core 4 and is fixed with the welding shaft core 4, the welding wheel 1 is sleeved on the outside of the welding wheel seat 7 and is fixed with the welding wheel seat 7, and the inside of the welding wheel seat 7 is located inside the composite current collector roller 2. The outside of the welding wheel 1 is provided with a tab seat 8, the outer diameter of the tab seat 8 is the same as the outer diameter of the welding wheel 1, and the tab seat 8 plays a role in assisting the support of the A surface foil, the B surface foil and the composite current collector. The tab seat 8, the welding wheel 1 and the welding wheel seat 7 are fixed together by screws. Therefore, when the welding wheel 1 needs to be replaced, the screws on the tab seat 8 are unscrewed, and the welding wheel 1 can be taken out and replaced with a new welding wheel 1. Specifically, the tab seat 8 is provided with a plurality of first screw holes in the circumferential direction, the welding wheel 1 is provided with a plurality of second screw holes corresponding to the first screw holes in the circumferential direction, and the inside of the welding wheel seat 7 is provided with a plurality of third screw holes corresponding to the first screw holes in the circumferential direction, and the tab seat 8, the welding wheel 1 and the welding wheel seat 7 can be fixed together by screws passing through the corresponding first screw holes, second screw holes and third screw holes.

[0035] Please refer to Figure 3 Further, the connecting part of the composite current collector roller 2 and the welding shaft core 4 is provided with a bearing 9, the composite current collector roller 2 is sleeved on the welding shaft core 4 through the bearing 9, the outer ring of the bearing 9 is connected with the composite current collector roller 2 through a bearing adapter block 10, and the inner ring of the bearing 9 is connected with the welding shaft core 4. Through the above-mentioned bearing 9 and bearing adapter block 10, the composite current collector roller 2 is sleeved on the welding shaft core 4 and can stably rotate along the welding shaft core 4.

[0036] Please refer to Figures 1 to 3 Further, the two ends of the welding shaft core 4 are respectively provided with welding bearing seats 11, and the welding bearing seats 11 play a role in supporting the welding shaft core 4.

[0037] Please refer to Figure 1 , Figure 2 , Figure 4 Further, the lower part of the welding wheel 1 is provided with a bearing wheel assembly 12, and the bearing wheel assembly 12 plays a role in supporting the welding wheel 1 during the welding process. Because a certain pressure needs to be given during the ultrasonic welding process, if the lower part of the welding wheel 1 is not supported, it is easy to cause the welding shaft core 4 to be bent during the welding process, that is, to affect the welding quality and to need to be frequently replaced. Specifically, the bearing wheel assembly 12 includes a bearing base 121 and two bearing wheels 122 rotatably arranged on the bearing base 121, the wheel surfaces of the two bearing wheels 122 are respectively in contact with the two sides of the lower wheel surface of the welding wheel 1, play a role in supporting the welding wheel 1, and will not affect the normal rotation of the bearing wheels 122. At the same time, the wheel surface width of the bearing wheels 122 is consistent with the wheel surface width of the welding wheel 1, so that the bearing wheels 122 can avoid affecting the composite current collector roller 2 beside.

[0038] It should be understood that modifications or variations can be made to the above described embodiments by those of ordinary skill in the art, and that all such modifications and variations are intended to be within the scope of the claims to the present application.

[0039] The above description of the present application is illustrative only and is not intended to limit the present application in any way. Rather, the present application is intended to cover all modifications and variations of the present application that are within the scope of the appended claims.

Claims

1. An active welding roller structure, applied in an ultrasonic rolling welding mechanism, characterized in that, The welding wheel for supporting the welding part of the A-face foil, the composite current collector and the B-face foil, the composite current collector passing roller for supporting the main body of the composite current collector, the welding shaft core and the welding wheel driving motor, the welding wheel and the composite current collector passing roller are arranged side by side, the output shaft of the welding wheel driving motor is connected with the welding shaft core, the welding wheel is detachably sleeved on the welding shaft core and can rotate synchronously with the welding shaft core, and the composite current collector passing roller is sleeved on the welding shaft core and can rotate along the welding shaft core. The height difference between the highest point of the welding wheel and the highest point of the composite current collector passing roller is equal to half of the thickness of the main body of the composite current collector minus the thickness of the B-face foil. The connection part of the welding wheel and the welding shaft core is provided with a welding wheel seat, the welding wheel seat is sleeved outside the welding shaft core and is fixed with the welding shaft core, the welding wheel is sleeved outside the welding wheel seat and is fixed with the welding wheel seat, and the inner side of the welding wheel seat is located inside the composite current collector passing roller. The outer side of the welding wheel is provided with a tab seat, the tab seat, the welding wheel and the welding wheel seat are fixed together through screws, and the outer diameter of the tab seat is the same as the outer diameter of the welding wheel. A load bearing wheel assembly is arranged below the welding wheel, the load bearing wheel assembly comprises a load bearing base and two load bearing wheels rotatably arranged on the load bearing base, and the wheel surfaces of the two load bearing wheels are respectively in contact with the two sides of the lower wheel surface of the welding wheel.

2. The active backing roll structure of claim 1 wherein, A plurality of first screw holes are arranged circumferentially on the tab seat, a plurality of second screw holes corresponding to the first screw holes are arranged circumferentially on the welding wheel, and a plurality of third screw holes corresponding to the first screw holes are arranged circumferentially on the inner side of the welding wheel seat, and the tab seat, the welding wheel and the welding wheel seat are fixed together through screws passing through the corresponding first screw holes, second screw holes and third screw holes.

3. The active backing roll structure of claim 1 wherein, A bearing is arranged at the connection part of the composite current collector passing roller and the welding shaft core, and the composite current collector passing roller is sleeved on the welding shaft core through the bearing.

4. The active backing roll structure of claim 1 wherein, The active welding roller structure further comprises a speed reducer and a coupling, the output shaft of the welding wheel driving motor is connected with one end of the speed reducer, and the other end of the speed reducer is connected with the welding shaft core through the coupling.

5. The active backing roll structure of claim 1 wherein, Welding bearing seats for supporting the welding shaft core are arranged at both ends of the welding shaft core.

6. The active backing roll structure of claim 1 wherein, The wheel surface width of the load bearing wheel is consistent with the wheel surface width of the welding wheel.

Images