Welding heating demolding device and welding method thereof
By using a combination of a dual-hold clamping device, a position sensor, and a pressure sensor in the welding equipment, the problem of unstable welding quality caused by welding head misalignment was solved, and the stability of welding quality was improved.
Patent Information
- Application Number
- CN202511375109.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-12-19
AI Technical Summary
Existing welding equipment suffers from insufficient stability of the single-sided fixing device, causing the half-wave welding head to shift under high-frequency mechanical vibration, which affects the stability of welding quality.
A double-grip device is used to fix both sides of the welding head, and the lifting mechanism is controlled by position and pressure sensors to adjust the welding position and pressure of the welding head to ensure welding stability.
It improves the stability of welding quality and reduces wear and poor welding quality caused by welding head position misalignment.
Smart Images
Figure CN121156473A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding technology, and in particular to a welding heating and demolding device and a welding method thereof. Background Technology
[0002] In the manufacturing process of polymer batteries, the welding of the electrode sheet and the tab is one of the core processes that determines the conductivity, safety and cycle life of the polymer battery. Its working principle is to weld the end of the tab to the foil area of the electrode sheet through physical or chemical action to form a highly stable and low-impedance electrical connection.
[0003] In existing welding equipment, the lifting and lowering of a single-sided fixed half-wave welding head is controlled by a cylinder. A transducer within the single-sided fixing device generates high-frequency mechanical vibration in the half-wave welding head to achieve ultrasonic welding of the electrode sheet and tab. However, due to the insufficient stability of the single-sided fixing device, the half-wave welding head may shift under the influence of high-frequency mechanical vibration. The cylinder cannot adjust the lifting and lowering distance to accommodate this shift, preventing the half-wave welding head from performing ultrasonic welding from the preset position and affecting the stability of the welding quality. Summary of the Invention
[0004] This application provides a welding heating and demolding device and a welding method thereof, which can improve the stability of welding quality.
[0005] The first aspect of this application provides a welding heating demolding device, comprising: a fixed panel, and an upper mold mounting base and a bottom mold mounting base fixed to the fixed panel; The upper mold mounting base is provided with a welding assembly, and the bottom mold mounting base is provided with a welding base located below the welding assembly and a demolding device located below the welding base. The welding assembly includes a guide fixing seat, a lifting mechanism, a welding head, and a double-holding clamping device. The lifting mechanism is located inside the guide fixing seat and is vertically connected to the double-holding clamping device. The double-holding clamping device is fixedly connected to the left and right sides of the welding head. The lifting mechanism is equipped with a position sensor for detecting the welding position of the welding head and a pressure sensor for detecting the welding pressure of the welding head. The fixed panel is also equipped with an electrode feeding assembly and an electrode conveying platform, and the electrode conveying platform is equipped with the electrode feeding assembly.
[0006] Optionally, the dual-grip device is connected to an adjustment mechanism for adjusting the parallelism of the welding head; the adjustment mechanism includes a connector, a bearing seat, a lifting shaft, and a connecting plate. The connector has a knob and a first gear at both ends, the lifting shaft has a second gear and the connecting plate at both ends, and the connecting plate is fixedly connected to the left and right sides of the dual-grip device. The first gear and the second gear are mounted on the bearing seat and mesh with each other.
[0007] Optionally, the lifting mechanism includes a servo motor and a ball screw, the output shaft of the servo motor is connected to the lead screw of the ball screw, and the nut of the ball screw is connected to the double-holding clamping device.
[0008] Optionally, the electrode feeding assembly includes: a feeding frame, an electrode roll reel, a plurality of first guide rollers, a moving mechanism, a first clamping device, a second clamping device, and a cutting device; The plurality of first guide rollers are sequentially fixed on the feeding frame along an L-shaped path, forming an electrode conveying guide rail for conveying the electrode tabs to the cutting mechanism; the electrode tab reel is fixed on the feeding frame and located at the feed end of the electrode conveying guide rail, and an electrode tab protective plate is also provided below the electrode tab reel; the first clamping device, the second clamping device, and the cutting device are fixed on the same plane of the feeding frame, and the cutting device is located between the first clamping device and the second clamping device; the moving mechanism is movably connected to the first clamping device and the second clamping device respectively.
[0009] Optionally, the electrode feeding assembly includes a plurality of second guide rollers; the plurality of second guide rollers are arranged sequentially along the edge of the fixed panel and the plane where the welding base is located, forming a conveying guide rail for conveying the electrode to the welding base.
[0010] Optionally, a first cylinder is provided on the bottom mold mounting base, the first cylinder is connected to a moving plate, and the left and right sides of the moving plate are connected to the second guide rollers located on the left and right sides of the welding base, respectively.
[0011] Optionally, the demolding device includes a second cylinder fixed to the movable plate and a mold-picking rod connected to the second cylinder, the mold-picking rod being located below the welding base.
[0012] Optionally, a heating block is fixed on the bottom mold mounting base, the welding base is mounted on the heating block, and the heating block is connected to a heating rod and a temperature sensor.
[0013] Optionally, each of the four welding surfaces in the welding base is provided with two parallel welding platforms.
[0014] A second aspect of this application provides a welding heating demolding method, applied to the welding heating demolding apparatus described in any of the preceding claims, comprising the following steps: Step 1: Perform yellow label testing on the tabs and coating testing on the electrodes respectively; Step 2: When the detection result is no misalignment, a descent command is sent to the lifting mechanism to instruct the lifting mechanism to drive the welding head to descend, and at the same time, the real-time welding position data collected by the position sensor and the real-time welding pressure data collected by the pressure sensor are acquired. Step 3: Adjust the descent stroke of the lifting mechanism based on the real-time welding position data and the real-time welding pressure data; Step 4: When the real-time welding position data and the real-time welding pressure data reach the preset conditions, a stop command is sent to the lifting mechanism and the welding head is controlled to perform ultrasonic welding. Step 5: After welding is completed, send a lifting command to the lifting mechanism and control the demolding device to start, so as to complete demolding.
[0015] As can be seen from the above technical solutions, this application has the following effects: The upper mold mounting base is equipped with a welding assembly, and the lower mold mounting base is equipped with a welding base located below the welding assembly and a demolding device located below the welding base. The welding assembly includes a guide fixing seat, a lifting mechanism, a welding head, and a double-holding clamping device. The lifting mechanism is located within the guide fixing seat and is vertically connected to the double-holding clamping device. The double-holding clamping device is fixedly connected to the left and right sides of the welding head. The lifting mechanism is equipped with a position sensor for detecting the welding position of the welding head and a pressure sensor for detecting the welding pressure of the welding head. The fixing panel is also equipped with an electrode feeding assembly and an electrode tab conveying platform, on which the electrode tab feeding assembly is installed. In this way, both sides of the welding head can be fixed simultaneously by the double-holding clamping device to reduce the impact of high-frequency mechanical vibration on the stability of the welding head. Furthermore, the lifting process of the lifting mechanism is controlled by the position sensor and the pressure sensor to adjust the lifting distance based on the welding position and welding pressure of the welding head, reducing welding wear or poor welding quality caused by welding head position deviation, thereby improving the stability of the welding head and thus improving the stability of the welding quality. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the welding heating and demolding device in this application; Figure 2 This is a schematic diagram of the electrode feeding assembly in this application; Figure 3 This is a schematic diagram of the structure of the fixed panel in this application. Figure 4 This is a schematic diagram of the welding assembly in this application; Figure 5 This is a schematic diagram of the bottom mold mounting base in this application; Figure 6 This is a schematic diagram of the regulating mechanism in this application; Figure 7 This is a schematic diagram of the welding base in this application.
[0017] The annotations in the attached figures are explained as follows: Fixed panel-1, upper mold mounting base-2, bottom mold mounting base-3, first cylinder-31, moving plate-32, second cylinder-33, mold lifting rod-34, heating block-35, heating rod-36, temperature sensor-37, welding assembly-4, guide fixing seat-41, lifting mechanism-42, servo motor-421, ball screw-422, welding head-43, double-hold clamping device-44, position sensor-45, pressure sensor-46, adjusting mechanism-47, connecting piece-471, bearing seat-47 2. Lifting shaft - 473, Connecting plate - 474, Knob - 475, First gear - 476, Second gear - 477, Welding base - 5, Welding platform - 51, Demolding device - 6, Electrode feeding assembly - 7, Second guide roller - 71, Electrode conveying platform - 8, Electrode feeding assembly - 9, Feeding frame - 91, Electrode reel - 92, First guide roller - 93, Moving mechanism - 94, First clamping device - 95, Second clamping device - 96, Cutting device - 97, Electrode protective plate - 98. Detailed Implementation
[0018] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.
[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0021] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.
[0022] This application provides a welding heating and demolding device and a welding method thereof, which are used to improve the stability of welding quality.
[0023] Please see Figures 1 to 7 As shown, the welding heating demolding device in this application includes: a fixed panel 1, and an upper mold mounting base 2 and a lower mold mounting base 3 fixed on the fixed panel 1; a welding assembly 4 is provided on the upper mold mounting base 2, and a welding base 5 located below the welding assembly 4 and a demolding device 6 located below the welding base 5 are provided on the lower mold mounting base 3; the welding assembly 4 includes a guide fixing seat 41, a lifting mechanism 42, a welding head 43, and a double-holding clamping device 44. The lifting mechanism 42 is located inside the guide fixing seat 41, and the lifting mechanism 42 is connected to the double-holding clamping device 44 in a liftable manner. The double-holding clamping device 44 is fixedly connected to the left and right sides of the welding head 43. The lifting mechanism 42 is provided with a position sensor 45 for detecting the welding position of the welding head 43 and a pressure sensor 46 for detecting the welding pressure of the welding head 43; the fixed panel is also provided with an electrode feeding assembly 7 and an electrode tab conveying platform 8, and an electrode tab feeding assembly 9 is installed on the electrode tab conveying platform 8.
[0024] In this embodiment, the guide fixing seat 41 is fixedly installed at the bottom of the upper mold mounting seat 2. The guide fixing seat 41 can be a type of fixing seat with guide posts and guide sleeves, for example, four guide posts and guide sleeves are respectively set to connect two parallel guide fixing plates. The two guide fixing plates have guide channels adapted to the lifting mechanism 42, which can provide precise guidance for the lifting movement of the lifting mechanism 42, ensuring that the lifting mechanism 42 will not deviate during the movement, thereby improving the welding position accuracy of the welding head 43. The double-holding clamping device 44 is provided with two symmetrical clamping rings. These two clamping rings adopt a detachable structure and are fixed to both sides of the welding head 43 by the tightness of the bolts, which facilitates the replacement of the welding head 43. Transducers are also provided on the outer sides of these two clamping rings. The transducers realize the conversion of electrical energy and mechanical energy, so that the welding head 43 generates high-frequency mechanical vibration. The high-frequency mechanical vibration causes plastic deformation and local temperature rise at the contact surface between the electrode tab and the electrode plate, destroying the oxide layer and forming a metal bond connection, thereby realizing the ultrasonic welding of the welding head 43. Position sensor 45 is used to detect the welding position of welding head 43 in real time. By transmitting the detected position signal to the central control system, the central control system can adjust the movement of lifting mechanism 42 according to preset welding position parameters to ensure that welding head 43 can reach the designated welding position, thereby improving welding position accuracy. Pressure sensor 46 is used to detect the welding pressure of welding head 43 in real time. When welding head 43 contacts electrode tab, pressure sensor 46 will feed back the detected pressure signal to the central control system. If the welding pressure exceeds or falls below the preset reasonable range, the central control system will adjust the output force of lifting mechanism 42 in time to keep the welding pressure within a reasonable range, avoiding damage to welding head 43 or incomplete welding due to improper pressure. The position of welding base 5 corresponds to the position of welding head 43 and is used to place the electrode tab and electrode sheet to be welded. Demolding device 6 is set below welding base 5 and fixedly connected to bottom mold mounting base 3. Its main function is to push the welded electrode tab and electrode sheet out of welding base 5 after welding, thereby achieving automatic demolding. The tab conveying platform 8 is installed in the same direction as the upper mold mounting base on the fixed panel. The tab conveying platform 8 is slidably connected to the tab feeding assembly 9, providing a moving platform for the tab feeding assembly 9. The tab feeding assembly 9 is used to convey the tabs to be welded to the welding base, and the electrode feeding assembly 7 is used to convey the electrodes to be welded to the welding base.
[0025] In this way, the welding head 43 can be fixed on both sides simultaneously by the double-holding clamping device 44, thereby reducing the impact of high-frequency mechanical vibration on the stability of the welding head 43. Furthermore, the lifting mechanism 42 is controlled by the position sensor 45 and the pressure sensor 46 to adjust the lifting distance based on the welding position and welding pressure of the welding head 43. This reduces welding wear or poor welding quality caused by the positional deviation of the welding head 43, thereby improving the stability of the welding head 43 and consequently improving the stability of the welding quality.
[0026] In some embodiments, please refer to Figure 4 and Figure 6 As shown, the double-handed clamping device 44 is connected to an adjustment mechanism 47 for adjusting the parallelism of the welding head 43. The adjustment mechanism 47 includes a connector 471, a bearing seat 472, a lifting shaft 473, and a connecting plate 474. The two ends of the connector 471 are respectively provided with a knob 475 and a first gear 476. The two ends of the lifting shaft 473 are respectively provided with a second gear 477 and a connecting plate 474. The connecting plate 474 is fixedly connected to the left and right sides of the double-handed clamping device 44. The first gear 476 and the second gear 477 are installed on the bearing seat 472 and the first gear 476 and the second gear 477 mesh.
[0027] Specifically, knob 475 is located at one end of connector 471 for manual adjustment by the operator. First gear 476 is fixedly mounted at the other end of connector 471, and its tooth profile and number of teeth are matched with second gear 477, enabling stable meshing transmission. Connector 471 and lifting shaft 473 are vertically connected via first gear 476 and second gear 477, respectively. Connector 471 can rotate around its own axis. When the operator rotates knob 475, connector 471 drives first gear 476 to rotate synchronously, and second gear 477 rotates synchronously under the meshing transmission of first gear 476, driving lifting shaft 473 to move up and down. The clamping ring of the double-holding clamping device 44 is equipped with a spring pressure ring, and the left and right sides of connecting plate 474 are connected to the outer shells of the two clamping rings, respectively. When the connecting plate 474 is subjected to an upward or downward force driven by the lifting shaft 473, this force drives the outer shell of the clamping ring to rotate along the internal spring pressure ring, thereby adjusting the position of the welding head 43 around the connecting line between the two clamping rings, thus achieving parallelism adjustment of the welding head 43. It should be noted that this parallelism is the deviation angle between the plane of the welding head 43 and the top plane of the welding base 5; that is, this parallelism can be used to determine whether the welding head 43 and the welding base 5 are parallel. Through this adjustment mechanism 47, precise correction of the parallelism of the welding head 43 can be achieved, ensuring that the welding surfaces of the welding head 43 and the welding base 5 always remain parallel, avoiding welding defects caused by parallelism deviation.
[0028] In some embodiments, please refer to Figure 4 As shown, the lifting mechanism 42 includes a servo motor 421 and a ball screw 422. The output shaft of the servo motor 421 is connected to the lead screw of the ball screw 422, and the nut of the ball screw 422 is connected to the double-holding clamping device 44.
[0029] Specifically, the ball screw 422 is a transmission component that converts the rotary motion of the servo motor 421 into linear motion. It consists of a screw, a nut, and balls. The screw is a slender cylindrical structure with helical grooves machined on its outer surface. The nut is fitted onto the screw, and its inner surface is also machined with helical grooves that match the screw. Steel balls are installed between the helical grooves of the screw and the nut. When the screw rotates under the drive of the output shaft of the servo motor 421, the balls roll in the helical grooves, causing the nut to move linearly along the screw, which in turn causes the double-holding clamping device 44, which is fixedly connected to the nut, to move up and down along the direction of the screw. Because the servo motor 421 has extremely high position control accuracy and can achieve pulse-level displacement control, combined with the high-precision transmission of the ball screw 422, the lifting and lowering displacement control accuracy of the welding head 43 is greatly improved, ensuring that the welding head 43 can accurately reach the preset welding position and effectively reducing welding quality problems caused by position deviation.
[0030] In some embodiments, please refer to Figure 2 As shown, the tab feeding assembly 9 includes: a feeding frame 91, a tab reel 92, a plurality of first guide rollers 93, a moving mechanism 94, a first clamping device 95, a second clamping device 96, and a cutting device 97; the plurality of first guide rollers 93 are sequentially fixed on the feeding frame 91 along an L-shaped path to form a tab conveying guide rail for conveying the tabs to the cutting mechanism; the tab reel 92 is fixed on the feeding frame 91 and located at the feeding end of the tab conveying guide rail, and a tab protective plate 98 is also provided below the tab reel 92; the first clamping device 95, the second clamping device 96, and the cutting device 97 are fixed on the same plane of the feeding frame 91, and the cutting device 97 is located between the first clamping device 95 and the second clamping device 96; the moving mechanism 94 is movably connected to the first clamping device 95 and the second clamping device 96 respectively.
[0031] Specifically, the feeding frame 91 can be an L-shaped frame with an electrode ear reel 92 mounted on its longitudinal plane. This reel 92 stores the electrodes in a wound manner. When feeding is required, the electrode ear reel 92 is rotated to feed the electrodes onto the electrode ear conveying guide rail composed of several first guide rollers 93. The first clamping device 95 and the second clamping device 96 are located on the left and right sides of the cutting device 97, respectively. The first clamping device 95 is used to fix the electrodes before they are fed into the cutting device 97, and the second clamping device 96 is used to convey the cut electrodes to the welding base. The moving mechanism 94 can include two driving components, which are used to drive the first clamping device 95 and the second clamping device 96 to move, respectively. These two driving components can be directly cylinders or a combination of servo motors and ball screws; specific details are not limited here.
[0032] In some embodiments, please refer to Figure 1 and Figure 3 As shown, the electrode feeding assembly 7 includes several second guide rollers 71; the several second guide rollers 71 are arranged sequentially along the edge of the fixed panel 1 and the plane where the welding base 5 is located, forming an electrode conveying guide rail for conveying the electrode to the welding base 5.
[0033] Specifically, each second guide roller 71 is rotatably mounted on the fixed panel 1, allowing it to rotate flexibly around its own axis, thereby reducing the resistance encountered by the electrode sheet during transport. Several second guide rollers 71 together form a continuous, smooth electrode sheet transport rail, extending from the initial placement position of the electrode sheet to the plane of the welding base 5, providing a stable transport channel for the electrode sheet. The electrode sheet transport rail formed by several second guide rollers 71 effectively limits and guides the electrode sheet, ensuring it maintains the correct posture and path during transport, reducing electrode sheet offset and skew. Furthermore, by placing some of the second guide rollers 71 at the edge of the fixed panel 1, the space occupied by the electrode sheet transport rail can be reduced, thereby improving the utilization rate of the internal space of the welding heating and demolding device.
[0034] In some embodiments, please refer to Figure 5 As shown, a first cylinder 31 is provided on the bottom mold mounting base 3. The first cylinder 31 is connected to a moving plate 32. Rollers located on the left and right sides of the welding base 5 are connected to the left and right sides of the moving plate 32, respectively. Specifically, the moving plate 32 is perpendicular to the top plane of the welding base 5. The first cylinder 31 is used to drive the moving plate 32 to move up and down. The second guide rollers 7 on both sides of the moving plate 32 move synchronously under the drive of the moving plate 32, realizing the height adjustment of the second guide rollers 7, thereby realizing the adjustment of the feeding height of the electrode sheet.
[0035] In some embodiments, please refer to Figure 5As shown, the demolding device 6 includes a second cylinder 33 fixed on the movable plate 32 and a mold-lifting rod 34 connected to the second cylinder 33. The mold-lifting rod 34 is located below the welding base 5.
[0036] Specifically, the mold-lifting rod 34 adopts a slender rod-shaped structure. The mold-lifting rod 34 is parallel to the top plane of the welding base 5. The piston rod of the second cylinder 33 is perpendicular to the top plane of the welding base 5. The second cylinder 33 is used to drive the mold-lifting rod 34 to perform lifting and lowering movements, so as to push out the electrode tabs and electrode plates on the welding base 5 through the mold-lifting rod 34 to achieve demolding.
[0037] In some embodiments, please refer to Figure 5 As shown, a heating block 35 is fixed on the bottom mold mounting base 3, and a welding base 5 is mounted on the heating block 35. The heating block 35 is connected to a heating rod 36 and a temperature sensor 37. Specifically, the heating block 35 is made of a metal material with a high thermal conductivity, such as a copper alloy. The upper surface of the heating block 35 is in close contact with the lower surface of the welding base 5 to reduce thermal resistance and improve heat conduction efficiency. The heating block 35 has mounting holes that are compatible with the heating rod 36. The mounting holes are evenly distributed along the length of the heating block 35 to ensure that heat is evenly diffused within the heating block 35. The number of heating rods 36 can be one, two, or more, and is not limited here. By providing auxiliary heating to the welding base 5, welding efficiency can be improved. The temperature sensor 37 can be a resistance temperature detector (RTD) or a thermocouple. The temperature of the heating block 35 is collected by the temperature sensor 37 to achieve indirect real-time monitoring of the temperature of the welding base 5.
[0038] In some embodiments, please refer to Figure 7 As shown, two parallel welding platforms 51 are provided on each of the four welding surfaces of the welding base 5. Specifically, in the existing welding base 5, only one welding platform 51 is provided on each of the four welding surfaces. By providing a group of two welding platforms 51 on each welding surface, the number of times the welding base 5 can be used can be increased, thereby improving the service life of the welding base 5.
[0039] This application also provides a welding heating demolding method, applied to the welding heating demolding device in any of the foregoing embodiments, comprising the following steps: Step 1: Perform yellow label testing on the tabs and coating testing on the electrodes respectively; Step 2: When the detection result shows no misalignment, send a descent command to the lifting mechanism to instruct the lifting mechanism to drive the welding head down, and at the same time acquire the real-time welding position data collected by the position sensor and the real-time welding pressure data collected by the pressure sensor. Step 3: Adjust the descent stroke of the lifting mechanism based on real-time welding position data and real-time welding pressure data; Step 4: When the real-time welding position data and real-time welding pressure data reach the preset conditions, send a stop command to the lifting mechanism and control the welding head to perform ultrasonic welding; Step 5: After welding is completed, send a lifting command to the lifting mechanism and control the demolding device to start to complete demolding.
[0040] In this embodiment, the electrode feeding assembly is first activated to transport the electrode to the welding base. Then, the tab feeding assembly is activated to transport the tab to the electrode located on the welding base. Next, yellow label detection is performed on the tab, and coating detection is performed on the electrode. It should be noted that yellow label detection refers to checking whether the yellow label mark or coating area of the tab is aligned with the welding ball of the electrode. If they are not aligned, it indicates a misalignment. Electrode coating detection refers to checking whether the active material coating in the electrode is applied according to the design position. Common characteristics include: coating offset towards the welding pre-reserved area, coating deviating from the current collector, or asymmetrical left and right edges of the coating. If they are not aligned, it indicates a misalignment. When it is determined that both the yellow label detection and the electrode coating detection show no misalignment, a descent command is sent to the lifting mechanism, causing the welding head to move closer to the tab under the action of the double-holding clamping device. During the downward movement of the welding head, the position sensor on the lifting mechanism detects the position of the welding head in real time and transmits the position signal to the central control system. The central control system controls the movement stroke of the lifting mechanism according to preset welding position parameters. Simultaneously, the pressure sensor on the lifting mechanism monitors the welding pressure of the welding head pair in real time and feeds the pressure signal back to the control system. If the welding pressure exceeds the preset range, the control system will control the lifting mechanism to adjust the output force appropriately to reduce the welding pressure; if the welding pressure is lower than the preset range, the control system will control the lifting mechanism to increase the output force to increase the welding pressure, ensuring that the welding pressure is always kept within a reasonable range and guaranteeing welding quality. When the welding position and welding pressure are determined to meet the preset conditions, the welding head can be started to perform ultrasonic welding on the electrode and electrode tab. After welding is completed, the welding head stops working, and the lifting mechanism drives the double-holding clamping device and the welding head to move upward and reset to the initial position. Then, the demolding device is activated to push the electrode and electrode tab on the welding base out, realizing automatic demolding.
[0041] It should be stated that the above-described invention and specific embodiments are intended to demonstrate the practical application of the technical solution provided in this application and should not be construed as limiting the scope of protection of this application. Those skilled in the art can make various modifications, equivalent substitutions, or improvements within the spirit and principles of this application. The scope of protection of this application is determined by the appended claims.
Claims
1. A welding heating and demolding device, characterized in that, Includes: a fixed panel, and an upper mold mounting base and a bottom mold mounting base fixed to the fixed panel; The upper mold mounting base is provided with a welding assembly, and the bottom mold mounting base is provided with a welding base located below the welding assembly and a demolding device located below the welding base. The welding assembly includes a guide fixing seat, a lifting mechanism, a welding head, and a double-holding clamping device. The lifting mechanism is located inside the guide fixing seat and is vertically connected to the double-holding clamping device. The double-holding clamping device is fixedly connected to the left and right sides of the welding head. The lifting mechanism is equipped with a position sensor for detecting the welding position of the welding head and a pressure sensor for detecting the welding pressure of the welding head. The fixed panel is also equipped with an electrode feeding assembly and an electrode conveying platform, and the electrode conveying platform is equipped with the electrode feeding assembly.
2. The welding heating and demolding device according to claim 1, characterized in that, The dual-grip clamping device is connected to an adjustment mechanism for adjusting the parallelism of the welding head; the adjustment mechanism includes a connector, a bearing seat, a lifting shaft, and a connecting plate. The two ends of the connector are respectively provided with a knob and a first gear, and the two ends of the lifting shaft are respectively provided with a second gear and the connecting plate. The connecting plate is fixedly connected to the left and right sides of the dual-grip clamping device. The first gear and the second gear are mounted on the bearing seat and the first gear meshes with the second gear.
3. The welding heating and demolding device according to claim 1, characterized in that, The lifting mechanism includes a servo motor and a ball screw. The output shaft of the servo motor is connected to the lead screw of the ball screw, and the nut of the ball screw is connected to the double-holding clamping device.
4. The welding heating and demolding device according to claim 1, characterized in that, The electrode feeding assembly includes: a feeding frame, an electrode reel, several first guide rollers, a moving mechanism, a first clamping device, a second clamping device, and a cutting device; The plurality of first guide rollers are sequentially fixed on the feeding frame along an L-shaped path, forming an electrode conveying guide rail for conveying the electrode tabs to the cutting mechanism; the electrode tab reel is fixed on the feeding frame and located at the feed end of the electrode conveying guide rail, and an electrode tab protective plate is also provided below the electrode tab reel; the first clamping device, the second clamping device, and the cutting device are fixed on the same plane of the feeding frame, and the cutting device is located between the first clamping device and the second clamping device; the moving mechanism is movably connected to the first clamping device and the second clamping device respectively.
5. The welding heating and demolding device according to claim 1, characterized in that, The electrode feeding assembly includes several second guide rollers; the several second guide rollers are arranged sequentially along the edge of the fixed panel and the plane where the welding base is located, forming an electrode conveying guide rail for conveying the electrode to the welding base.
6. The welding heating and demolding device according to claim 5, characterized in that, The bottom mold mounting base is provided with a first cylinder, the first cylinder is connected to a moving plate, and the left and right sides of the moving plate are connected to the second guide rollers located on the left and right sides of the welding base, respectively.
7. The welding heating and demolding device according to claim 6, characterized in that, The demolding device includes a second cylinder fixed to the movable plate and a mold-picking rod connected to the second cylinder, the mold-picking rod being located below the welding base.
8. The welding heating and demolding device according to claim 1, characterized in that, A heating block is fixed on the bottom mold mounting base, the welding base is mounted on the heating block, and the heating block is connected to a heating rod and a temperature sensor.
9. The welding heating and demolding device according to claim 1, characterized in that, Each of the four welding surfaces in the welding base is provided with two parallel welding platforms.
10. A welding heating demolding method, applied to the welding heating demolding apparatus as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: Perform yellow label testing on the tabs and coating testing on the electrodes respectively; Step 2: When the detection result is no misalignment, a descent command is sent to the lifting mechanism to instruct the lifting mechanism to drive the welding head to descend, and at the same time, the real-time welding position data collected by the position sensor and the real-time welding pressure data collected by the pressure sensor are acquired. Step 3: Adjust the descent stroke of the lifting mechanism based on the real-time welding position data and the real-time welding pressure data; Step 4: When the real-time welding position data and the real-time welding pressure data reach the preset conditions, a stop command is sent to the lifting mechanism and the welding head is controlled to perform ultrasonic welding. Step 5: After welding is completed, send a lifting command to the lifting mechanism and control the demolding device to start, so as to complete demolding.