A welding device for multilayer current collectors

Abstract

This utility model provides a welding device for a multi-layer current collector, relating to the field of current collectors. It includes a welding device body and a pretreatment shell. A U-shaped bracket is slidably connected to the inner wall of the pretreatment shell. A guide rod is fixedly connected to the inner wall of the U-shaped bracket. A control slider is slidably connected to the outer circumference of the guide rod. A roller bracket is fixedly connected to the bottom of the control slider. A pressing roller is rotatably connected to the inner wall of the roller bracket. A force-bearing cam is rotatably connected to the top of the control slider. This application, through the arrangement of the pretreatment shell, U-shaped bracket, guide rod, control slider, roller bracket, pressing roller, force-bearing cam, linkage control plate, threaded slider, positioning shell, DC motor, unidirectional lead screw, positioning slider, and electric push rod, can effectively achieve the purpose of leveling the electrode tabs, solving serious defects such as incomplete welding, weak welding, welding sparks, and even weld burn-through, greatly improving the practical effect.

Description

Technical Field

[0001] This utility model relates to a welding device, specifically a welding device for a multi-layer current collector, belonging to the field of current collector technology. Background Technology

[0002] Current collectors, as the name suggests, refer to structures or components that collect electric current. In lithium-ion batteries, this mainly refers to metal foils, such as copper foil and aluminum foil. More generally, it can also include electrode tabs.

[0003] A search revealed a Chinese patent (CN217475052U) that discloses a battery electrode welding device with a composite current collector. This device incorporates a heating element to heat the welding teeth and a flow channel to guide the conductive medium. Heating the welding head helps to quickly soften the polymer material in the composite current collector, facilitating electronic conduction between the metal foils on both sides of the composite current collector. This allows for connection between the metal layers on both sides of the weld at the solder joint, improving electron transport and increasing electron transport capacity. Furthermore, the introduction of a flowing conductive substance allows tin or conductive adhesive to adhere to the solder joint, enhancing solder strength and preventing incomplete soldering of the composite current collector. This improves the performance of the composite current collector battery, increases welding force at the solder joint, and ultimately enhances the welding effect.

[0004] While the above solutions can improve the welding effect, the patents mentioned above make it difficult to flatten the tabs. The tabs are prone to bending, curling, wrinkling or slight twisting during the previous cutting, winding and stacking processes. Uneven welding surfaces cannot form a completely consistent physical contact with the current collector when pressure is applied, which will lead to serious defects such as incomplete welding, weak welding, welding sparks, or even weld penetration. Therefore, we provide a welding device for multi-layer current collectors to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for multilayer current collectors to solve the above-mentioned problems, thereby addressing the difficulty in leveling the electrode tabs in the prior art.

[0006] This utility model is achieved through the following technical solution: a welding device for multi-layer current collectors, comprising a welding device body and a pretreatment shell, wherein a U-shaped bracket is slidably connected to the inner wall of the pretreatment shell, a guide rod is fixedly connected to the inner wall of the U-shaped bracket, a control slider is slidably connected to the outer circumferential surface of the guide rod, a roller bracket is fixedly connected to the bottom of the control slider, a pressing roller is rotatably connected to the inner wall of the roller bracket, a force-bearing cam is rotatably connected to the top of the control slider, the force-bearing cam is slidably connected to the inclined groove of the linkage control plate, and a threaded slider is fixedly connected to the top of the linkage control plate. The cooperation between the components can effectively level the electrode tabs.

[0007] Preferably, the threaded slider is slidably connected to the inner wall of the positioning housing, and the positioning housing is fixedly connected to the top of the U-shaped bracket. The U-shaped bracket ensures the stable movement of multiple different components.

[0008] Preferably, a DC motor is fixedly connected to the top of the U-shaped bracket, and a one-way lead screw is fixedly connected to the output shaft of the DC motor. The one-way lead screw can effectively drive the threaded slider to move.

[0009] Preferably, the outer circumferential surface of the one-way lead screw is threadedly connected to the inner wall of the threaded slider, and the outer circumferential surface of the one-way lead screw is rotatably connected to the inner wall of the positioning housing. The positioning housing can protect its internal components.

[0010] Preferably, a positioning slider is fixedly connected to one side of the U-shaped bracket, and the positioning slider is slidably connected in a groove on the inner wall of the pretreatment shell. The pretreatment shell ensures the stability of the entire pretreatment mechanism.

[0011] Preferably, an electric push rod is fixedly connected to the top of the pretreatment shell, and a positioning shell is fixedly connected to one end of the electric push rod. The electric push rod is existing publicly available technology and will not be described in detail.

[0012] Preferably, the bottom of the welding equipment body is equipped with four casters, which allow the equipment to move flexibly.

[0013] This utility model provides a welding device for a multi-layer current collector, which has the following beneficial effects:

[0014] 1. This application, through the setting of a pre-processed shell, U-shaped bracket, guide rod, control slider, roller bracket, pressing roller, force-bearing cam, linkage control plate, threaded slider, positioning shell, DC motor, one-way lead screw, positioning slider, and electric push rod, can effectively achieve the purpose of leveling the electrode tabs, solving serious defects such as incomplete welding, weak welding, welding sparks, and even weld penetration, and greatly improving the practical effect.

[0015] 2. This application, through the design of the welding equipment body and casters, can effectively complete the welding work of multi-layer current collectors, which is convenient for operation and easy to move, thus facilitating subsequent handling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the pretreatment shell of this utility model;

[0018] Figure 3This is a three-dimensional structural diagram of the positioning slider of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the internal structure of the positioning shell of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the linkage control plate of this utility model.

[0021] [Explanation of Key Component Symbols]

[0022] 1. Welding equipment body; 2. Pre-treatment shell; 3. U-shaped bracket; 4. Guide rod; 5. Positioning slider; 6. Roller bracket; 7. Pressing roller; 8. Force-bearing cam; 9. Linkage control plate; 10. Threaded slider; 11. Positioning shell; 12. DC motor; 13. One-way lead screw; 14. Positioning slider; 15. Electric push rod; 16. Caster wheel. Detailed Implementation

[0023] This utility model embodiment provides a welding device for multilayer current collectors.

[0024] Please see Figure 1 The equipment includes a welding equipment body 1 and a pretreatment shell 2. The welding equipment body 1 is mainly used for welding multi-layer current collectors and consists of an operation screen, operation buttons, a cooling mechanism, a computer control system, a frame, a safety light curtain, a pressure fusion welding mechanism, and other components. The welding principle is that the workpiece to be welded is located between the upper and lower welding heads. When the upper welding head has a cylinder, it applies high pressure and high current to melt the metal layer of the composite current collector and vaporize the polymer layer, thereby achieving the effect of welding the upper and lower metal layers together. Components not described in detail are all existing publicly available technologies and will not be described in detail.

[0025] Please see Figure 1 The bottom of the main body 1 of the welding equipment is equipped with four casters 16. The purpose of setting four casters 16 is to enable the welding equipment to move flexibly as a whole and to ensure that it is stable during the movement and will not tilt.

[0026] Please see Figure 2 An electric push rod 15 is fixedly connected to the top of the pretreatment housing 2. One end of the electric push rod 15 is fixedly connected to the positioning housing 11. The purpose of setting the electric push rod 15 is to provide sufficient power support for the lifting and lowering of the positioning housing 11. The electric push rod 15 is existing technology, and this application will not elaborate on the electric push rod 15 further.

[0027] Please see Figure 2 and Figure 3The inner wall of the pretreatment shell 2 is slidably connected to a U-shaped bracket 3. The pretreatment shell 2 can apply a preliminary limiting effect to the U-shaped bracket 3. A positioning slider 14 is fixedly connected to one side of the U-shaped bracket 3. The positioning slider 14 is slidably connected in the groove of the inner wall of the pretreatment shell 2. The purpose of setting the positioning slider 14 is to enhance the stability of the U-shaped bracket 3 during the movement process, so that the U-shaped bracket 3 can only move vertically within the pretreatment shell 2.

[0028] Please see Figure 4 A DC motor 12 is fixedly connected to the top of the U-shaped bracket 3. The output shaft of the DC motor 12 is fixedly connected to a one-way lead screw 13. The purpose of setting the DC motor 12 is to effectively provide sufficient power support for the rotation of the one-way lead screw 13. The DC motor 12 is existing publicly available technology, and this application will not elaborate further on the DC motor 12.

[0029] Please see Figure 4 The outer circumferential surface of the one-way lead screw 13 is threadedly connected to the inner wall of the threaded slider 10. The cooperation between the one-way lead screw 13 and the threaded slider 10 allows the rotation of the one-way lead screw 13 to effectively drive the threaded slider 10 to translate when the threaded slider 10 is restricted.

[0030] Please see Figure 2 and Figure 4 The outer circumferential surface of the one-way lead screw 13 is rotatably connected to the inner wall of the positioning housing 11. The positioning housing 11 can provide auxiliary support for the one-way lead screw 13, thereby ensuring the stability of the one-way lead screw 13 during rotation. The inner wall of the U-shaped bracket 3 is fixedly connected to the guide rod 4, and the outer circumferential surface of the guide rod 4 is slidably connected to the control slider 5. The purpose of setting the guide rod 4 is to effectively apply the control effect to the control slider 5, thereby ensuring that the control slider 5 can slide stably in the horizontal direction.

[0031] Please see Figure 2 The bottom of the control slider 5 is fixedly connected to the roller bracket 6. The control slider 5 and the roller bracket 6 are directly connected and maintain the linkage effect. The inner wall of the roller bracket 6 is rotatably connected to the pressing roller 7. The purpose of setting the pressing roller 7 is to effectively shape and flatten the electrode tab position by moving and using frictional resistance.

[0032] Please see Figure 2 , Figure 3 and Figure 5 The top of the control slider 5 is rotatably connected to the force-receiving cam 8. The control slider 5 can apply a control effect to the force-receiving cam 8 to ensure that the force-receiving cam 8 can rotate in place. The purpose of setting the force-receiving cam 8 is to effectively reduce the frictional resistance between the components. The force-receiving cam 8 is slidably connected in the inclined groove of the linkage control plate 9. The linkage control plate 9 can effectively drive the force-receiving cam 8 to translate.

[0033] Please see Figure 4 and Figure 5 The top of the linkage control plate 9 is fixedly connected to a threaded slider 10. The linkage control plate 9 and the threaded slider 10 are integrated into one unit and maintain a linkage effect. The threaded slider 10 is slidably connected to the inner wall of the positioning housing 11. The positioning housing 11 can block the threaded slider 10 to prevent the threaded slider 10 from rotating. The positioning housing 11 is fixedly connected to the top of the U-shaped bracket 3.

[0034] Working principle: In use, the elongated electrode tab is placed inside the pretreatment housing 2, directly below the pressing roller 7. First, the electric push rod 15 is started, which can effectively push the positioning housing 11, U-shaped bracket 3 and other components downward, so that the pressing roller 7 contacts the electrode tab and performs pressing. Then, the DC motor 12 is started, which drives the one-way lead screw 13 to rotate in place inside the positioning housing 11. Because the threaded slider 10 is limited by the positioning housing 11, the one-way lead screw 13 can drive the linkage control plate 9 to move horizontally through the threaded slider 10. Furthermore, because the control slider 5, which is combined with the force-bearing cam 8, is restricted by the guide rod 4, under the influence of the specially designed inclined groove of the linkage control plate 9, the linkage control plate 9 can drive the control slider 5 to translate through the force-bearing cam 8, and make the two control sliders 5 move relative to each other. The control slider 5 will drive the pressing roller 7 to translate through the roller bracket 6, and use frictional resistance to press and stretch the long strip-shaped electrode from the inside out, so as to achieve the effect of shaping and flattening the long strip-shaped electrode. Then, the pressure fusion welding mechanism in the main body 1 of the welding equipment is used to complete the final welding operation.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding device for a multilayer current collector, comprising a welding device body (1) and a pretreatment shell (2), characterized in that: The inner wall of the pretreatment shell (2) is slidably connected to a U-shaped bracket (3), the inner wall of the U-shaped bracket (3) is fixedly connected to a guide rod (4), the outer circumferential surface of the guide rod (4) is slidably connected to a control slider (5), the bottom of the control slider (5) is fixedly connected to a roller bracket (6), the inner wall of the roller bracket (6) is rotatably connected to a pressing roller (7), the top of the control slider (5) is rotatably connected to a force-bearing cam (8), the force-bearing cam (8) is slidably connected in the inclined groove of the linkage control plate (9), and the top of the linkage control plate (9) is fixedly connected to a threaded slider (10).

2. The welding equipment for a multi-layer current collector according to claim 1, characterized in that: The threaded slider (10) is slidably connected to the inner wall of the positioning housing (11), and the positioning housing (11) is fixedly connected to the top of the U-shaped bracket (3).

3. The welding equipment for a multi-layer current collector according to claim 1, characterized in that: A DC motor (12) is fixedly connected to the top of the U-shaped bracket (3), and a one-way lead screw (13) is fixedly connected to the output shaft of the DC motor (12).

4. The welding equipment for a multi-layer current collector according to claim 3, characterized in that: The outer circumferential surface of the one-way screw (13) is threadedly connected to the inner wall of the threaded slider (10), and the outer circumferential surface of the one-way screw (13) is rotatably connected to the inner wall of the positioning housing (11).

5. The welding equipment for a multi-layer current collector according to claim 1, characterized in that: A positioning slider (14) is fixedly connected to one side of the U-shaped bracket (3), and the positioning slider (14) is slidably connected in the groove on the inner wall of the pre-treatment shell (2).

6. The welding equipment for a multi-layer current collector according to claim 1, characterized in that: An electric push rod (15) is fixedly connected to the top of the pretreatment shell (2), and a positioning shell (11) is fixedly connected to one end of the electric push rod (15).

7. The welding equipment for a multi-layer current collector according to claim 1, characterized in that: The bottom of the main body (1) of the welding equipment is equipped with casters (16), and there are four casters (16) in total.

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