An ultrasonic tab welding machine

Abstract

The utility model discloses an ultrasonic welding of a kind of tab machine, it is related to battery accessory technical field, solve the problem that manual welding tab exists low efficiency, quality is not unified. The welding machine includes: positioning fixture, the positioning fixture has the positioning slot for positioning tab on, the positioning slot has two positioning holes corresponding with two mounting holes respectively in;Ejection mechanism, the ejection mechanism has two liftable ejector rods, two ejector rods are respectively connected with two positioning holes upside-down and are inserted;Ultrasonic welding assembly, for welding pole on tab;Lifting control mechanism, for controlling the ultrasonic welding assembly lifting;Ultrasonic generator, the ultrasonic generator is connected with the ultrasonic welding assembly. The welding machine has positioning precision high, welding effect is good, welding quality uniformity and the like advantages, can greatly improve the welding efficiency of tab and pole, and simple operation, convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of battery accessory technology, and in particular to an ultrasonic welding machine for electrode tabs. Background Technology

[0002] Lithium-ion batteries possess excellent performance and are increasingly widely used. Their advantages, including long lifespan, practicality and safety, large capacity, small size, and light weight, have led to their widespread application in numerous fields.

[0003] There is an existing electrode structure such as Figure 9 As shown, the electrode tab structure is Y-shaped. Two mounting holes are located at one end of the tab, and a pole piece is installed in each hole. The pole piece passes through the mounting hole and is then fixed to the tab. There are generally two fixing methods: riveting and welding. Riveting may loosen over time, so welding is preferred. Conventional welding involves manually spot welding the pole piece to the tab. Manual spot welding is inefficient and results in inconsistent weld quality, making it difficult to meet production requirements. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing an ultrasonic welding machine for electrode tabs, which solves the problems of low efficiency and inconsistent quality in manual welding of electrode tabs.

[0005] The technical solution of this utility model to achieve the above objectives is as follows: an ultrasonic welding machine for electrode tabs, wherein the electrode tab has two mounting holes for mounting electrode posts, and the welding machine includes: A positioning fixture having a positioning groove for positioning the electrode tab, wherein the positioning groove has two positioning holes corresponding to two mounting holes respectively; The ejection mechanism has two liftable push rods, which are respectively connected to two positioning holes vertically. Ultrasonic welding assembly for welding poles to tabs; A lifting control mechanism is used to control the lifting of the ultrasonic welding assembly; An ultrasonic generator is connected to the ultrasonic welding assembly.

[0006] Preferably, the positioning fixture includes a positioning plate and a positioning block. The upper surface of the positioning plate has a positioning groove that matches the shape of the electrode lug. The positioning groove has two through holes that correspond to the mounting holes respectively. The top of the positioning block protrudes upward to form two positioning parts. The positioning block is located at the bottom of the positioning plate and the two positioning parts are respectively embedded in the two through holes. The positioning part has a vertically penetrating positioning hole in the middle, and the top rod is vertically inserted and connected to the positioning hole.

[0007] Preferably, one side of the positioning plate is recessed inward in the middle area of ​​the positioning groove to form an avoidance groove.

[0008] Preferably, the ejection mechanism includes an ejection cylinder, a cylinder mounting base, an extrusion member, and two ejector rods. The ejection cylinder is horizontally fixed to one side of the cylinder mounting base. The cylinder mounting base has an installation groove for mounting a positioning block and a guide hole extending from one side of the ejection cylinder to the other side. The guide hole communicates with the installation groove. The extrusion member is horizontally placed in the guide hole and connected to the output end of the ejection cylinder. The bottom of the two ejector rods is connected to a fixing block. The upper surface of the extrusion member has an inclined surface that cooperates with the fixing block.

[0009] Preferably, the fixing block is provided with a bolt, and the bottom of the bolt protrudes downward to form a ball portion that matches the inclined surface on the extrusion member.

[0010] Preferably, a clamping block for clamping the positioning block is provided on the side of the cylinder mounting base away from the ejector cylinder.

[0011] Preferably, the stud welding machine further includes: Platform board; A base plate is detachably mounted on the platform plate, and an angle plate is provided on the base plate. The positioning fixture is mounted on the angle plate. The support frame, on which the ultrasonic welding assembly can slide up and down, and the lifting control mechanism is mounted on the support frame.

[0012] Preferably, a slide rail is vertically fixed on the bracket, the ultrasonic welding assembly is slidably connected to the slide rail via a slider, and the lifting control mechanism is driven by the ultrasonic welding assembly.

[0013] Its advantages over existing technologies are: The ultrasonic welding machine for electrode tabs provided by this utility model has advantages such as high positioning accuracy, good welding effect, and uniform welding quality. The positioning groove on the positioning fixture can position the electrode tabs. After the two electrode posts are placed into the mounting holes on the electrode tabs, the ultrasonic welding assembly is lowered by the lifting control mechanism. The electrode posts are welded to the electrode tabs using the principle of ultrasonic vibration. After welding, the ejection mechanism controls two ejector rods to push the electrode posts upwards, allowing the electrode tabs to be removed from the positioning fixture quickly and easily. This welding machine can greatly improve the welding efficiency of electrode tabs and electrode posts, and is simple to operate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the ultrasonic welding nail machine with electrode tabs; Figure 2 This is a schematic diagram of the structure when the electrode tabs and electrode posts are placed on the positioning fixture; Figure 3 This is a schematic diagram of the positioning fixture; Figure 4 yes Figure 3 Another structural diagram from another perspective; Figure 5 This is a structural diagram of the positioning fixture and the ejection mechanism; Figure 6 This is a schematic diagram of the structure when the push rod and the positioning fixture are in conjunction; Figure 7 This is a structural diagram of the positioning plate; Figure 8 This is a cross-sectional view of the positioning block. Figure 9 This is a schematic diagram of the structure when the tabs and poles are welded together.

[0015] In the diagram, 1. Positioning fixture; 101. Positioning plate; 1011. Positioning groove; 1012. Clearance groove; 102. Positioning block; 1021. Positioning part; 1022. Serrated structure; 1023. Positioning hole; 2. Ejection mechanism; 201. Ejection cylinder; 202. Extrusion part; 203. Cylinder fixing seat; 204. Ejector rod; 205. Fixing block; 206. Bolt; 2061. Ball part; 3. Ultrasonic welding assembly; 4. Lifting cylinder; 5. Ultrasonic generator; 6. Fixing plate; 7. Base plate; 8. Support plate; 9. Clamping block; 10. Angle plate; 11. Support block; 12. Bracket; 13. Platform plate; 14. Electrode; 15. Electrode column. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] A preferred embodiment of this utility model proposes an ultrasonic welding machine for electrode tabs. This welding machine adopts fully automatic welding and utilizes the ultrasonic principle to weld the electrode post 15 to the electrode tab 14, ensuring uniform and guaranteed welding quality.

[0018] For details, see Figure 1 The welding nail machine mainly includes a platform plate 13, a positioning fixture 1, an ejection mechanism 2, a lifting cylinder 4, an ultrasonic welding assembly 3, an ultrasonic generator 5, a support 12, and other components.

[0019] The platform plate 13 serves as a working platform, providing stable support for the positioning fixture 1, the ejection mechanism 2, the lifting control mechanism, the ultrasonic welding assembly 3, the ultrasonic generator 5, and the bracket 12.

[0020] like Figures 1-4 As shown, a base plate 7 is provided on the platform plate 13, and the base plate 7 is fixedly installed on the platform plate 13 by bolts. A waist-shaped hole is provided on each side of the base plate 7, and the waist-shaped hole extends along the width direction of the base plate 7 to adjust the front and rear position of the base plate 7.

[0021] A support plate 8 is provided on the base plate 7, and the support plate 8 is fixedly installed on the base plate 7 by bolts. The support plate 8 also has waist-shaped holes on both sides, which extend along the length of the support plate 8, so as to adjust the left and right position of the support plate 8.

[0022] An angle plate 10 is provided on the platform plate 13, and the positioning fixture 1 is installed on the angle plate 10. The angle plate 10 provides support for the positioning fixture 1.

[0023] like Figure 3 , Figure 4 As shown, the positioning fixture 1 consists of a positioning plate 101 and a positioning block 102.

[0024] See Figure 7 A positioning groove 1011 is provided on the upper surface of the positioning plate 101. The shape of the positioning groove 1011 is adapted to the shape of the tab 14 and is used to position the tab 14.

[0025] Two through holes are also provided on the positioning plate 101. These two through holes are located in the positioning groove 1011 and correspond to the positions of the mounting holes on the tab 14. The two through holes correspond to the two mounting holes respectively.

[0026] like Figures 3-8 As shown, the positioning block 102 is located at the bottom of the positioning plate 101, directly below the through hole. Two positioning portions 1021 protrude upwards from the top surface of the positioning block 102, corresponding to the two through holes on the positioning plate 101, and are embedded within the through holes. Positioning holes 1023 are formed on the positioning block 102, extending from the top surface of the positioning portions 1021 to the bottom surface of the positioning block 102. When the electrode tab 14 is placed in the positioning groove 1011, the two electrode posts 15 are inserted into the positioning holes 1023 through the mounting holes on the electrode tab 14, thus positioning the electrode tab 14 through the positioning holes 1023.

[0027] On the top surface of each positioning part 1021, a serrated structure 1022 is formed around the positioning hole 1023. Under the action of the serrated structure 1022, during ultrasonic welding, the position on the tab 14 corresponding to the serrated structure 1022 will undergo local deformation, so that the tab 14 and the pole post 15 are in close contact and firmly welded together, making the connection tighter.

[0028] A support block 11 is provided at the bottom of the positioning plate 101. The side of the support block 11 has a guide groove that runs vertically through it, and the corner plate 10 can slide up and down along the guide groove. The support block 11 is fixedly connected to the corner plate 10 by bolts. A vertically extending waist-shaped hole is provided on the corner plate 10 to adjust the vertical height of the support block 11.

[0029] The positioning plate 101 is horizontally fixed to the top of the support block 11 by bolts. The positioning plate 101 also has a slotted hole to adjust its position.

[0030] like Figure 7 As shown, a relief groove 1012 is formed by an inward recess in the middle area of ​​the side of the positioning plate 101, which separates the front and rear ends of the positioning groove 1011. When the electrode tab 14 is placed in the positioning groove 1011, the relief groove 1012 can make way for it, making it easy to pick up the electrode tab 14.

[0031] like Figures 3-6 As shown, the ejection mechanism 2 is located below the positioning fixture 1. The ejection mechanism 2 mainly consists of an ejection cylinder 201, a cylinder mounting base 203, a pressing component 202, and two ejector rods 204. The cylinder mounting base 203 is fixedly mounted on the support plate 8 with bolts. The ejection cylinder 201 is horizontally fixed to one side of the ejection mechanism 2, and the output end of the ejection cylinder 201 is connected to the pressing component 202.

[0032] The cylinder mounting base 203 is integrally machined. A mounting groove is formed on the cylinder mounting base 203, extending downwards from the top surface of the cylinder mounting base 203 into its interior. The lower end of the positioning block 102 is embedded in this mounting groove. A clamping block 9 is provided on the side of the cylinder mounting base 203 away from the ejector cylinder 201. This clamping block 9 is fixed to the cylinder mounting base 203 by bolts and is used to clamp the positioning block 102.

[0033] A guide hole is also provided in the cylinder mounting base 203. The guide hole extends from one side of the cylinder mounting base 203 where the ejector cylinder 201 is located to the other side (i.e., the side away from the ejector cylinder 201). The extruder 202 is placed horizontally in the guide hole, which guides the horizontal sliding of the extruder 202.

[0034] Two push rods 204 are respectively inserted into two positioning holes 1023 on the positioning block 102. The lower ends of the two push rods 204 are connected to a fixed block 205. When the fixed block 205 moves up and down, it will drive the two push rods 204 to move up and down together.

[0035] In this embodiment, a bolt 206 is threadedly connected to the bottom of the fixing block 205, and the bottom of the bolt 206 has a hemispherical ball portion 2061 protruding from it. Correspondingly, an inclined surface is formed on the upper surface of the extruder 202, which cooperates with the ball portion 2061. When the ejector cylinder 201 drives the extruder 202 to move horizontally, it will drive the fixing block 205 and the two ejector rods 204 to move up and down together. The limited contact area between the ball portion 2061 and the inclined surface on the extruder 202 helps to reduce friction.

[0036] In other embodiments, bolts 206 may not be provided on the fixing block 205. The bottom surface of the fixing block 205 is formed with an inclined surface, and the fixed block 205 and the extrusion member 202 are engaged with the inclined surface, which has the same effect. However, this method has a larger contact area and the friction will also be greater.

[0037] like Figure 1 As shown, the bracket 12 is fixed to the platform plate 13 by bolts. The lifting cylinder 4, as the lifting control mechanism for driving the ultrasonic welding assembly 3 to move up and down, is vertically fixed to the bracket 12. A slide rail is provided on the bracket 12, which is vertically set. The ultrasonic welding assembly 3 is fixedly mounted on the fixing plate 6, and the fixing plate 6 is slidably connected to the slide rail by a slider. During welding, the lifting cylinder 4 controls the ultrasonic welding assembly 3 to move downward, so that the welding head of the ultrasonic welding assembly 3 is close to the electrode tab 14 and electrode post 15 placed on the positioning plate 101. Using the principle of ultrasonic vibration, the electrode post 15 is welded and fixed to the electrode tab 14.

[0038] The ultrasonic welding assembly 3 is connected to the ultrasonic generator 5, which converts the power frequency electricity into high-frequency electromagnetic waves to provide energy for the ultrasonic welding assembly 3. The ultrasonic welding assembly 3 mainly includes components such as a transducer, welding head, and amplitude transformer. As this is existing technology, its specific structure and principles will not be described in detail here.

[0039] During welding, the area where the pole post 15 on the tab 14 is located will be partially embedded in the positioning hole 1023, making it difficult to remove manually. At this time, the ejector cylinder 201 will control the extrusion component 202 to move horizontally. The inclined surface of the extrusion component 202 will drive the fixing block 205 and the two push rods 204 to move upward. The push rods 204 will push the tab 14 upward, making it easier to remove the combination of the tab 14 and the pole post 15 from the positioning plate 101.

[0040] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. An ultrasonic welding machine for electrode tabs, wherein the electrode tab (14) has two mounting holes for mounting electrode posts (15), characterized in that, The stud welding machine includes: Positioning fixture (1), the positioning fixture (1) has a positioning groove (1011) for positioning the electrode (14), the positioning groove (1011) has two positioning holes (1023) respectively corresponding to the two mounting holes; The ejection mechanism (2) has two liftable push rods (204), which are respectively connected to two positioning holes (1023) vertically. An ultrasonic welding assembly (3) is used to weld the pole post (15) onto the tab (14); A lifting control mechanism is used to control the lifting of the ultrasonic welding assembly (3); An ultrasonic generator (5) is connected to the ultrasonic welding assembly (3).

2. The ultrasonic welding nail machine for electrode tabs according to claim 1, characterized in that, The positioning fixture (1) includes a positioning plate (101) and a positioning block (102). The upper surface of the positioning plate (101) is formed with a positioning groove (1011) that is adapted to the shape of the tab (14). The positioning groove (1011) has two through holes that correspond to the mounting holes respectively. The top of the positioning block (102) protrudes upward to form two positioning parts (1021). The positioning block (102) is located at the bottom of the positioning plate (101) and the two positioning parts (1021) are respectively embedded in the two through holes. The positioning part (1021) has a positioning hole (1023) that runs vertically through it. The top rod (204) is inserted and connected vertically to the positioning hole (1023).

3. The ultrasonic welding nail machine for electrode tabs according to claim 2, characterized in that, One side of the positioning plate (101) is recessed inward in the middle area of ​​the positioning groove (1011) to form an avoidance groove (1012).

4. The ultrasonic welding nail machine for electrode tabs according to claim 2, characterized in that, The ejection mechanism (2) includes an ejection cylinder (201), a cylinder mounting base (203), an extrusion member (202), and two ejector rods (204). The ejection cylinder (201) is horizontally fixed to one side of the cylinder mounting base (203). The cylinder mounting base (203) has an installation groove for mounting a positioning block (102) and a guide hole that extends from one side of the ejection cylinder (201) to the other side. The guide hole is connected to the installation groove. The extrusion member (202) is horizontally placed in the guide hole and connected to the output end of the ejection cylinder (201). The bottom of the two ejector rods (204) is connected to a fixing block (205). The upper surface of the extrusion member (202) has an inclined surface that cooperates with the fixing block.

5. The ultrasonic welding nail machine for electrode tabs according to claim 4, characterized in that, The fixing block (205) is provided with a bolt (206), and the bottom of the bolt (206) protrudes downward to form a ball part (2061) that matches the inclined surface on the extrusion member (202).

6. The ultrasonic welding nail machine for electrode tabs according to claim 4, characterized in that, A clamping block (9) for clamping the positioning block (102) is provided on the side of the cylinder mounting base (203) away from the ejector cylinder (201).

7. The ultrasonic welding nail machine for electrode tabs according to claim 1, characterized in that, The stud welding machine also includes: Platform board (13); A base plate (7) is detachably mounted on the platform plate (13). An angle plate (10) is provided on the base plate (7), and the positioning fixture (1) is mounted on the angle plate (10). The bracket (12) is provided on which the ultrasonic welding assembly (3) can slide up and down, and the lifting control mechanism is installed on the bracket (12).

8. The ultrasonic welding nail machine for electrode tabs according to claim 7, characterized in that, A slide rail is vertically fixed on the bracket (12), and the ultrasonic welding assembly (3) is slidably connected to the slide rail via a slider. The lifting control mechanism is driven and connected to the ultrasonic welding assembly (3).

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