Lithium battery protection plate welding equipment

Abstract

The application relates to the technical field of battery protection plate welding equipment, and discloses a lithium battery protection plate welding equipment which comprises a multi-shaft gantry structure, a tin wire feeding mechanism is assembled on the multi-shaft gantry structure, a welding pen adjusting mechanism is fixed at the output end of the multi-shaft gantry structure, a welding pen clamping mechanism is assembled on the welding pen adjusting mechanism, and a solder paste supply mechanism is further included; in the process of continuous welding, the material at the cooperation end of the paste discharging port is flipped out through a V-shaped wheel, is heated and melted through a heat conduction assembly, and is subjected to auxiliary welding, and after welding, the material is flipped again for replenishment. The material is filled in the same way repeatedly, the tin wire feeding mechanism is matched, the welding point state of the repaired NG product is similar, the problem that the welding point difference of the repaired welding NG protection plate is too large is solved, and convenience is provided for subsequent input of an automatic production line.

Description

Technical Field

[0001] This invention relates to the field of battery protection board welding equipment technology, and in particular to a lithium battery protection board welding equipment. Background Technology

[0002] The lithium battery protection board is the cornerstone of lithium battery safety. During the welding process, strict quality control is crucial to ensure the board accurately monitors and effectively executes protective actions, preventing dangerous situations such as overcharging, over-discharging, overcurrent, and short circuits. In automated welding equipment, factors such as incoming material condition, equipment stability, and operator behavior can all lead to welding abnormalities. During post-weld inspection, defective (NG) products are identified. On continuously operating production lines, a certain number of NG products are generated daily. While materials meeting scrap standards are directly discarded, repairable products still require repair to meet standards. NG products require cleaning of the original weld points before secondary welding. After cleaning, some oxide layer remains at the weld points of the lithium battery protection board. To ensure effective secondary welding, no-clean flux is typically used. However, current solder paste supply equipment has high requirements for the viscosity of solder paste. Solder paste with low viscosity can be supplied through a needle-type extrusion mechanism, similar to the operation method of a dispensing machine. However, unlike colloids, the substances in colloids are evenly distributed and their flow rate is relatively easy to control. Solder paste has a complex composition. If a dispensing machine is used for supply, the nozzle is prone to clogging, and the application effect is difficult to achieve the expected result. Furthermore, if manual soldering is used for repair, manual control of the amount of solder paste and solder wire is required. Batch processing makes it difficult to control material usage and ensure solder joint consistency, thus negatively impacting subsequent automated processing. The numerous operational steps also affect soldering efficiency, failing to meet the demands of automated production. Therefore, developing a jig for repairing defective lithium battery protection boards is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a lithium battery protection board welding device to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions: A lithium battery protection board welding equipment includes a multi-axis gantry structure, a solder wire feeding mechanism mounted on the multi-axis gantry structure, a solder pen adjustment mechanism fixed at the output end of the multi-axis gantry structure, a solder pen clamping mechanism mounted on the solder pen adjustment mechanism, and a solder paste supply mechanism.

[0005] The soldering pen clamping mechanism includes a soldering pen holder fixed on the soldering pen adjustment mechanism, a soldering pen fixed inside the soldering pen holder, and a fixing block fixed on the outer wall of the soldering pen. One end of the fixing block cooperates with the solder wire feeding mechanism, and the other end cooperates with the solder paste supply mechanism.

[0006] The solder paste supply mechanism includes a swing arm mechanism that works in conjunction with the solder pen clamping mechanism, which provides support. A solder paste hopper is fixed below the swing arm mechanism. A solder paste tube is provided on one side of the solder paste hopper. A sealing connector is provided above the solder paste tube. The sealing connector is connected to an external air supply device to press the solder paste inside into the solder paste hopper. A solder paste discharge port is provided below the solder paste hopper.

[0007] The soldering pen clamping mechanism also includes a heat-conducting component fixed on the soldering pen tip, which is a cooperating mechanism with the paste discharge port. It heats the flux paste at the discharge port by transferring the heat of the soldering pen, so that it melts and flows into the welding position along the guide structure for auxiliary welding.

[0008] Preferably, the multi-axis gantry mechanism includes a controller, which is an integrated control system for the welding equipment. A carrier platform is located at the center of the controller, and a gantry is located on the upper surface of the controller. An X-axis moving mechanism is fixed on the gantry, and a connecting plate is fitted on the X-axis moving mechanism. A Z-axis moving mechanism is fixedly installed on the connecting plate, and a solder wire feeding mechanism is fixed on one side of the Z-axis moving mechanism. A soldering pen adjustment mechanism is fixedly connected to the end output shaft of the Z-axis moving mechanism.

[0009] Preferably, the Z-axis moving mechanism includes a lead screw mechanism fixed on the connecting plate, a sliding connecting mechanism slidably fitted on the lead screw mechanism, a limit support mechanism sleeved on one side of the sliding connecting mechanism, and the two ends of the limit support mechanism being fixedly connected to the connecting plate through a fixed plate. A sliding rod is rotatably fitted on the other side of the sliding connecting mechanism, and a rotating mechanism for driving the sliding rod to rotate is fitted on the sliding rod. The end of the sliding rod is fixedly engaged with the soldering pen adjustment mechanism.

[0010] Preferably, the heat-conducting component includes a limiting sleeve that is fixed to the heating head of the soldering pen by bolts. A heat-conducting plate is fixedly welded to one side of the limiting sleeve, and a fixing crossbar is welded to both sides of the heat-conducting plate. A flow guide groove is fixedly welded to one end of the fixing crossbar at the position corresponding to the heat-conducting plate, and the bottom of the flow guide groove extends toward the landing point of the soldering pen.

[0011] Preferably, the upper end face of the guide channel and the discharge port are a mating mechanism, and the end of the discharge port is fixed with a baffle that mates with the guide channel. The baffle fits with the guide channel to position and install the solder paste supply mechanism. The heat is conducted through the heat conduction plate to heat the solder paste flowing out of the discharge port, melt it, and then allow it to flow along the guide channel to the welding position.

[0012] Preferably, the welding pen adjustment mechanism includes a fixed clamping block that is fixed to the Z-axis moving mechanism by bolts, a micro-motion slide is fixed on the fixed clamping block, a linear slide rail and a slider structure are assembled between the micro-motion slide and the fixed clamping block, a limiting block for limiting the micro-motion slide is fixed at the bottom of the fixed clamping block, and an angle adjustment plate for fixing the welding pen clamping mechanism is fixed on the micro-motion slide.

[0013] Preferably, the swing arm mechanism includes a swing arm fixing plate fixed to one side of the fixing block. The swing arm fixing plate has a waist hole, and a rotating support is fixedly installed in the waist hole by bolts. A rotating arm is rotatably fitted on the outer wall of the rotating support. The lower end of the rotating arm is fixedly connected to the solder paste tank. An eccentric shaft hole is provided at the upper end of the rotating arm. A sliding hinge seat is rotatably fitted in the shaft hole. An elastic bushing is fitted above the sliding hinge seat. A connecting shaft is rotatably fitted above the elastic bushing, and the connecting shaft is fixedly connected to the limiting block.

[0014] Preferably, the sliding hinge seat and the elastic bushing are in sliding engagement, the sliding hinge seat is provided with a pin hole, the elastic bushing is provided with a waist hole corresponding to the pin hole, the elastic bushing and the sliding hinge seat are in sliding engagement by a pin limit, and a compression spring is provided between the inner hole of the sliding hinge seat and the elastic bushing.

[0015] Preferably, the solder paste supply mechanism further includes a discharge valve, which includes a V-shaped wheel rotatably fitted to the discharge port. A rotating pull rod and a push rod are fixedly connected to both ends of the rotating shaft of the V-shaped wheel, respectively. A tension spring is provided at both ends of the rotating pull rod in an equilateral triangle geometric relationship with a point on the side of the discharge port. A baffle plate is provided in the V-groove of the V-shaped wheel, and the baffle plate divides the V-groove equally. A magnetic attraction structure is provided between both ends of the baffle plate and the discharge port. A limiting stop rod is provided below the push rod for pushing the push rod to rotate, and one end of the limiting stop rod is fixedly welded to the guide groove.

[0016] Preferably, the solder wire feeding mechanism includes a wire feeding mechanism fixed on the connecting plate, a wire spool support mechanism is provided above the wire feeding mechanism, and a solder wire limiting mechanism is fixed on one side of the fixed block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The solder paste supply mechanism of this invention controls the distance between the paste discharge port and the soldering pen by adjusting the position of the swing arm mechanism. The external air pipe of the sealed connector controls its air supply time through a controller and a solenoid valve. A pressure valve installed on the air supply pipe controls its air supply pressure, thereby controlling the amount of solder paste discharged from the discharge port. This solution has low requirements for the viscosity of the solder paste, and the discharge port does not directly act on the solder joint. Therefore, it does not require a precise paste application outlet, has low production costs, and its simple structure facilitates later maintenance.

[0018] 2. The swing arm mechanism of this invention, during continuous welding, causes the connecting shaft to be pulled, and the connecting rod between the connecting shaft and the rotating support is stretched to the same straight line. This pulls the shaft hole end of the rotating arm, causing the middle rotating arm to rotate clockwise around the rotating support, thus moving the solder paste hopper and discharge port fixed at the lower end of the rotating arm away from the heat-conducting component. Similarly, when welding is pressed down again, the rotating arm rotates counterclockwise around the rotating support, bringing the solder paste hopper and discharge port fixed at the lower end of the rotating arm closer to the heat-conducting component. In this way, the discharge port is only close to the heat-conducting component during welding, thus avoiding prolonged baking, which could cause the discharge port temperature to rise, melt the solder paste, overflow, and cause contamination.

[0019] 3. The paste discharge valve of this invention, during continuous welding, flips the V-shaped wheel to discharge the material at the end that mates with the paste discharge port. This material is then heated and melted by the heat-conducting component for auxiliary welding. After welding, the valve flips again to replenish the material. This process is repeated, ensuring that the material added each time is the same. Combined with the solder wire feeding mechanism, this results in similar solder joint conditions on repaired NG products, thus solving the problem of excessive solder joint differences in repaired NG protection boards and facilitating subsequent integration into automated production lines. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a lithium battery protection board welding equipment according to the present invention; Figure 2 This is an assembly diagram of the main structure of a lithium battery protection board welding equipment according to the present invention; Figure 3 This is a partial structural assembly diagram of the soldering pen clamping mechanism and the solder paste supply mechanism of the present invention; Figure 4 This is an assembly schematic diagram of the solder paste supply mechanism of the present invention; Figure 5 This is the present invention. Figure 4 A magnified view of area A in the middle; Figure 6 This is a schematic diagram of the structure of the heat-conducting component and the grease discharge valve of the present invention; Figure 7 This is a partial cross-sectional view of the ointment discharge port and ointment discharge valve of the present invention; Figure 8 This is the present invention. Figure 7 A magnified view of area B in the middle; Figure 9 This is a partial cross-sectional view of the swing arm mechanism of the present invention.

[0022] The annotations in the attached figures are explained as follows: 1. Controller; 2. Carrier platform; 3. X-axis moving mechanism; 4. Connecting plate; 5. Z-axis moving mechanism; 6. Solder wire feeding mechanism; 7. Solder pen adjusting mechanism; 8. Solder pen clamping mechanism; 9. Solder paste supply mechanism; 51. Lead screw mechanism; 52. Sliding connection mechanism; 53. Limiting support mechanism; 54. Sliding rod; 55. Rotation mechanism; 61. Wire spool support mechanism; 62. Wire feeding mechanism; 63. Solder wire limiting mechanism. 71. Fixed clamping block; 72. Micro-motion slide; 73. Angle adjustment plate; 74. Limiting block; 81. Solder pen holder; 82. Solder pen; 83. Fixed clamping block; 84. Heat-conducting component; 91. Solder paste tube; 92. Sealing connection seat; 93. Solder paste hopper; 94. Discharge port; 95. Discharge valve; 96. Swing arm mechanism; 841. Limiting sleeve; 842. Heat-conducting plate; 843. Flow guide groove; 941. Baffle; 951. V-shaped wheel; 952. Rotating pull rod; 953. Tension spring; 954. Push rod; 955. Material baffle plate; 956. Magnetic suction structure; 957. Limiting stop bar; 961. Swing arm fixing plate; 962. Rotating support; 963. Rotating arm; 964. Sliding hinge seat; 965. Elastic bushing; 966. Connecting shaft. Detailed Implementation

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-9 As shown, a lithium battery protection board welding equipment includes a multi-axis gantry structure. The multi-axis gantry structure is a common small jig platform, which forms a multi-axis linkage small jig through a carrier platform and a spatial coordinate system multi-axis moving module. It is widely used in the automation industry, completing precision machining through precise spatial coordinate movement. A solder wire feeding mechanism 6 is mounted on the multi-axis gantry structure. The solder wire feeding mechanism 6 is existing technology, and its application in soldering-related industries is very mature. A soldering pen adjustment mechanism 7 is fixed at the output end of the multi-axis gantry structure. A soldering pen clamping mechanism 8 is mounted on the soldering pen adjustment mechanism 7. The soldering pen adjustment mechanism 7 is used to install and fix the soldering pen clamping mechanism 8. When producing different batches of products, the welding position is different. The angle of the soldering pen can be adjusted by adjusting the installation position of the soldering pen clamping mechanism 8 on the soldering pen adjustment mechanism 7. The equipment also includes a solder paste supply mechanism 9. Fluxes come in liquid and solid forms. Conventional fluxes are highly corrosive, requiring thorough cleaning of the solder joint after use. Flux residue is also conductive, posing a hazard to lithium battery protection boards. This can damage delicate electronic components, leading to malfunctions, inaccurate measurements, or even short circuits. New protection boards generally do not require flux during soldering, as the surface of existing solder joints is uniform and the welding wire usually contains flux. However, when repairing NG (non-grade) products, residual solder must be removed, inevitably leaving some oxide residue. To avoid cold solder joints and ensure solder quality, no-clean flux can be used for auxiliary soldering.

[0026] As one embodiment of the present invention, such as Figure 2As shown: The solder pen clamping mechanism 8 includes a solder pen fixing frame 81 fixed to the solder pen adjusting mechanism 7. The solder pen fixing frame 81 is fixedly connected to the solder pen adjusting mechanism 7 by bolts. A solder pen 82 is fixed inside the solder pen fixing frame 81. A fixing block 83 is fixed on the outer wall of the solder pen 82. The fixing block 83 clamps and fixes the solder pen 82. One end of the fixing block 83 cooperates with the solder wire feeding mechanism 6, and the other end cooperates with the solder paste supply mechanism 9. The fixing block 83 is used to support the solder wire feeding mechanism 6 and the solder paste supply mechanism 9. Through installation position adjustment, the execution ends of the solder wire feeding mechanism 6 and the solder paste supply mechanism 9 are adapted to the welding head of the solder pen 82, so that they act on the same solder joint during soldering.

[0027] As one embodiment of the present invention, such as Figure 2-3 As shown: The solder paste supply mechanism 9 includes a swing arm mechanism 96 that cooperates with the solder pen clamping mechanism 8, which plays a supporting role. A solder paste hopper 93 is fixed below the swing arm mechanism 96. A solder paste tube 91 is provided on one side of the solder paste hopper 93. A sealing connection seat 92 is provided above the solder paste tube 91. The sealing connection seat 92 presses the solder paste inside into the solder paste hopper 93 through an external air supply device. A solder paste discharge port 94 is provided below the solder paste hopper 93.

[0028] In actual operation, the distance between the discharge port 94 and the soldering pen 82 is controlled by adjusting the position of the swing arm mechanism 96. The external air pipe of the sealing connection seat 92 is controlled by the controller and the solenoid valve to control its ventilation time. An air pressure valve is installed on the air pipe to control its ventilation pressure, thereby controlling the amount of soldering paste discharged from the discharge port 94.

[0029] As one embodiment of the present invention, such as Figure 2-3 As shown: The soldering pen clamping mechanism 8 also includes a heat-conducting component 84 fixed on the soldering pen 82 welding head, which is a cooperating mechanism with the paste discharge port 94. By transferring the heat of the soldering pen 82, the heat of the paste flux at the paste discharge port 94 is heated, so that it melts and flows into the welding position along the guide structure for auxiliary welding.

[0030] In actual operation, the solder paste discharged from the discharge port 94 is baked by the heat-conducting component 84, melts into liquid, and flows to the solder joint along the arc-shaped flow guide structure set by the heat-conducting component 84, wetting the solder joint.

[0031] As one embodiment of the present invention, such as Figure 1As shown: The multi-axis gantry mechanism includes a controller 1, which is the integrated control system for the welding equipment. The controller 1 has multiple operator buttons. A carrier platform 2 is located at the center of the controller 1. The illustrated portion is the base platform of the carrier platform 2, below which is a servo motor-driven Y-axis moving mechanism. Different jigs can be bolted to the base platform. A gantry is located on the upper surface of the controller 1, serving as a support structure. Wiring runs from inside the gantry structure to the upper actuators. An X-axis moving mechanism 3 is fixed to the gantry, and a connecting plate 4 is fitted onto the X-axis moving mechanism 3. The X-axis moving mechanism 3 is driven by a servo motor, and its synchronous belt is connected and fixed to the connecting plate 4 via a clamping structure. The main support structure of the connecting plate 4 is a linear slider module, which is fixed to the gantry structure, allowing the connecting plate 4 to slide on the linear slider module. The X-axis displacement of the connecting plate 4 is controlled by the X-axis moving mechanism 3. A Z-axis moving mechanism 5 is fixedly installed on the connecting plate 4, and a solder wire feeding mechanism 6 is fixed to one side of the Z-axis moving mechanism 5. A soldering pen adjusting mechanism 7 is fixedly connected to the end output shaft of the Z-axis moving mechanism 5. The Z-axis moving mechanism 5 controls the soldering pen clamping mechanism 8 to perform soldering by controlling the Z-axis coordinate of the soldering pen clamping mechanism 8.

[0032] As one embodiment of the present invention, such as Figure 2 As shown: The Z-axis moving mechanism 5 includes a lead screw mechanism 51 fixed on the connecting plate 4. The lead screw mechanism 51 is mounted on one end face of the connecting plate 4 via a fixed connecting plate and is driven by a servo motor. A sliding connecting mechanism 52 is slidably fitted onto the lead screw mechanism 51. A limiting support mechanism 53 is sleeved on one side of the sliding connecting mechanism 52, and both ends of the limiting support mechanism 53 are fixedly connected to the connecting plate 4 via fixed plates. The limiting support mechanism 53 is fixed between the upper and lower fixed plates of the lead screw mechanism 51 and slidably fits with the sliding connecting mechanism 52, providing support and limiting during the up-and-down movement of the sliding connecting mechanism 52 driven by the rotation of the lead screw mechanism 51. A sliding rod 54 is rotatably fitted onto the other side of the sliding connecting mechanism 52, and a rotating mechanism 55 is fitted onto the sliding rod 54 for driving its rotation. The end of the sliding rod 54 is fixedly engaged with the soldering pen adjusting mechanism 7. The lead screw mechanism 51 drives the sliding rod 54 to move along the Z-axis via the sliding connecting mechanism 52, and the rotating mechanism 55 drives the sliding rod 54 to rotate around the Z-axis.

[0033] As one embodiment of the present invention, such as Figure 4-5As shown: The heat-conducting assembly 84 includes a limiting sleeve 841 fixed to the heating head of the soldering pen 82 by bolts. A heat-conducting plate 842 is fixedly welded to one side of the limiting sleeve 841. The limiting sleeve 841 is divided into an upper fixing sleeve and a lower auxiliary sleeve, which are welded to the heat-conducting plate 842 as a whole and fixedly mounted to the heating head of the soldering pen 82 by bolts. Fixed crossbars are welded to both sides of the heat-conducting plate 842. A guide groove 843 is fixedly welded to one end of the fixed crossbar at the position corresponding to the heat-conducting plate 842, and the bottom of the guide groove 843 extends towards the landing point of the soldering pen 82. The fixed crossbars are used to support the guide groove 843, and the end of the guide groove 843 guides the molten solder paste to the welding point.

[0034] As one embodiment of the present invention, such as Figure 3-5 As shown: The upper end face of the guide channel 843 and the discharge port 94 are a mating mechanism. The end of the discharge port 94 is fixed with a baffle 941 that mates with the guide channel 843. The baffle 941 is a lower extension baffle. The baffle 941 fits with the guide channel 843 to position and install the solder paste supply mechanism 9. The heat is conducted through the heat conduction plate 842 to heat the solder paste flowing out of the discharge port 94 and melt it, so that it flows along the guide channel 843 to the welding position.

[0035] In practice, by controlling the air intake of the sealing connector 92, the solder paste in the solder paste tube 91 is pushed along the solder paste hopper 93 to the discharge port 94, and then discharged from the discharge port 94 between the discharge port 94 and the heat-conducting plate 842 and the guide channel 843. The heat transferred by the heat-conducting plate 842 melts the discharged solder paste, which then flows along the guide channel 843 to the welding point. It is worth noting that during operation, the soldering pen 82 is connected to the temperature controller and is in a constant temperature state. The heat-conducting plate 842 connected to it is also always in a high temperature state. When the solder paste is extruded, it melts rapidly. After the front end of the solder paste melts, the solder paste at the rear end is farther away from the heat-conducting plate 842, which can interrupt the melting process.

[0036] As one embodiment of the present invention, such as Figure 2-3 As shown: The soldering pen adjustment mechanism 7 includes a fixed clamping block 71 bolted to the Z-axis moving mechanism 5. A micro-motion slide 72 is fixed on the fixed clamping block 71. A linear slide rail and slider structure are assembled between the micro-motion slide 72 and the fixed clamping block 71. A limiting block 74 for limiting the micro-motion slide 72 is fixed at the bottom of the fixed clamping block 71. An angle adjustment plate 73 for fixing the soldering pen clamping mechanism 8 is fixed on the micro-motion slide 72. The soldering pen holder 81 is bolted to the angle adjustment plate 73. Changing the fixing hole position of the soldering pen holder 81 and the angle adjustment plate 73 can adjust the position of the soldering pen holder 81, thereby adjusting the angle of the soldering pen 82. When the soldering pen needs to press down on the cable for welding, when the Z-axis moving mechanism 5 drives the soldering pen clamping mechanism 8 to press down, after the soldering pen 82 contacts the welding point, the micro-motion slide 72 provides a buffer distance to avoid direct rigid contact that could damage the protective plate.

[0037] As one embodiment of the present invention, such as Figure 4 As shown: The swing arm mechanism 96 includes a swing arm fixing plate 961 fixed to one side of the fixing block 83. The swing arm fixing plate 961 has a waist hole, and a rotating support 962 is fixedly installed in the waist hole by bolts. The rotating support 962 can move in the waist hole. After adjusting and adapting to the position, it is fixed in the waist hole by bolts. A rotating arm 963 is rotatably fitted on the outer wall of the rotating support 962. The rotating arm 963 can rotate around the rotating support 962 as a fulcrum. The mating hole of the rotating arm 963 is clearance-fitted with the outer shaft of the rotating support 962. The lower end of the rotating arm 963 is fixedly connected to the solder paste tank 93. The rotating arm 963 serves as a support structure for the solder paste supply mechanism 9 and can drive the solder paste supply mechanism 9 to rotate around the rotating support 962. The upper end of the rotating arm 963 has an eccentrically located shaft hole, in which a sliding hinge seat 964 is rotatably fitted. Above the sliding hinge seat 964 is an elastic bushing 965, and above the elastic bushing 965 is a connecting shaft 966, which is fixedly connected to the limiting block 74. The shaft hole is located on the side of the rotating arm 963 away from the soldering pen 82, so that when the connecting shaft 966, the shaft hole, and the rotating support 962 are collinear, their axis forms an angle with the centerline of the rotating arm 963. The shaft of the connecting shaft 966 is fixedly connected to the limiting block 74, and a rotating connecting rod is rotatably fitted at the end of the shaft. The end of the rotating connecting rod of the connecting shaft 966 is fixedly connected to the elastic bushing 965.

[0038] In actual operation, during the process of Z-axis moving mechanism 5 driving soldering pen clamping mechanism 8 and solder paste supply mechanism 9 to move and weld, the relative position of micro-motion slide 72 and limit block 74 will change. When Z-axis moving mechanism 5 pulls soldering pen clamping mechanism 8, the relative distance between micro-motion slide 72 and limit block 74 decreases due to gravity. When soldering pen 82 touches the solder joint, as Z-axis moving mechanism 5 continues to rotate, fixed clamp 71 moves downward. At this time, the height of micro-motion slide 72 remains unchanged, and the relative distance between limit block 74 and micro-motion slide 72 increases. During this process, by adjusting the installation position of the swing arm mechanism 96, the rotation point of the shaft of the connecting shaft 966 is not on the same straight line as the shaft hole of the rotating arm 963 and the rotating support 962; at the same time, with the height of the welding point as a reference, the relative distance between the limiting block 74 and the micro-motion slide 72 is maximized when the welding position is in the welding position, and there is a downward buffer distance. After the welding is completed, the Z-axis moving mechanism 5 retracts, which first drives the fixed clamping block 71 to rise and the limiting block 74 fixed on the fixed clamping block 71 to rise, gradually bringing the limiting block 74 closer to the micro-motion slide 72, and then pulling the micro-motion slide 72 to rise together; As the limiting block 74 gradually moves from the welding position to the micro-motion slide 72, the connecting shaft 966 is pulled, and the connecting rod between the connecting shaft 966 and the rotating support 962 is stretched to the same straight line, thereby pulling the shaft hole end of the rotating arm 963, causing the middle rotating arm 963 to rotate clockwise around the rotating support 962, so that the solder paste hopper 93 and the discharge port 94 fixed at the lower end of the rotating arm 963 are moved away from the heat-conducting component 84. Similarly, when the soldering pen 82 stops moving after being pressed down again, the connecting shaft 966 continues to press down under the action of the limiting block 74. At this time, the connecting rod between the connecting shaft 966 and the rotating support 962 is compressed and deflected. With the shaft hole provided in the rotating arm 963 as the deflection point, the rotating arm 963 rotates counterclockwise around the rotating support 962 so that the solder paste hopper 93 and the solder paste discharge port 94 fixed at the lower end of the rotating arm 963 are close to the heat conduction component 84.

[0039] In this way, the solder paste outlet 94 is only close to the heat-conducting component 84 during soldering, thereby avoiding prolonged baking, which would cause the temperature of the solder paste outlet 94 to rise, melt and overflow, and cause contamination.

[0040] As one embodiment of the present invention, such as Figure 4 and Figure 9 As shown: The sliding hinge seat 964 and the elastic bushing 965 are slidably engaged. The sliding hinge seat 964 has a pin hole, and the elastic bushing 965 has a corresponding slot hole. The elastic bushing 965 and the sliding hinge seat 964 are slidably engaged by a pin. A compression spring is provided between the inner holes of the sliding hinge seat 964 and the elastic bushing 965. The elastic bushing 965 provides a flexible connection between the connecting shaft 966 and the sliding hinge seat 964. When the discharge port 94 rotates and comes into contact with the heat-conducting component 84, the compression spring contracts to absorb the displacement of the connecting shaft 966, preventing the rotating arm 963 from rotating further.

[0041] As one embodiment of the present invention, such as Figure 5-8As shown: The solder paste supply mechanism 9 also includes a discharge valve 95, which includes a V-shaped wheel 951 rotatably fitted to the discharge port 94. The V-shaped wheel 951 engages with the rectangular opening of the discharge port 94. A rotating pull rod 952 and a push rod 954 are fixedly connected to both ends of the rotating shaft of the V-shaped wheel 951, respectively. The rotating pull rod 952 and the push rod 954 rotate synchronously with the V-shaped wheel 951. A tension spring 953 is provided at both ends of the rotating pull rod 952 in an equilateral triangle geometric relationship with a point on the side of the discharge port 94. The tension spring 953 is connected to the upper end of the rotating pull rod 952. When the rotating pull rod 952 rotates clockwise with the V-shaped wheel 951, the tension spring 953 is stretched. The component force provided by the tension spring prevents the V-shaped wheel 951 from rotating. When the V-shaped wheel 951 continues to rotate and the tension spring 953 becomes parallel to the rotating pull rod 952, the pull rod 952 continues to rotate, and the component force provided by the tension spring 953 assists the V-shaped wheel 951 in rotating. A baffle plate 955 is provided in the V-groove of the V-shaped wheel 951, and the baffle plate 955 divides the V-groove equally. Magnetic attraction structures 956 are provided between the two ends of the baffle plate 955 and the paste discharge port 94. The baffle plate 955 divides the V-shaped wheel 951 equally, and the magnetic attraction structure 956 limits the position so that one side of the baffle plate 955 is located inside the paste discharge port 94, and the other side is located outside the paste discharge port 94. A limiting stop 957 is provided below the push rod 954 for pushing the push rod 954 to rotate, and one end of the limiting stop 957 is fixedly welded to the guide groove 843.

[0042] In specific operation, during the welding process driven by the Z-axis moving mechanism 5, the soldering pen adjusting mechanism 7, the soldering pen clamping mechanism 8, and the solder paste supply mechanism 9, the positional relationship between the micro-motion slide 72 and the limit block 74 is changed, thereby altering the engagement state between the solder paste discharge port 94 and the heat-conducting component 84. When the solder paste discharge port 94 engages with the heat-conducting component 84, the push rod 954 of the solder paste discharge valve 95... Figure 6 In the indicated state, when the discharge port 94 moves away from the heat-conducting component 84, the push rod 954 is pushed by the limiting stop 957, causing the V-wheel 951 to rotate around its center. Simultaneously, the rotating pull rod 952 fixed to the other end of the V-wheel 951 rotates synchronously. After the limiting stop 957 pushes the push rod 954, V-wheel 951, and rotating pull rod 952 to rotate a certain angle, the push rod 954 gradually disengages from the limiting stop 957. Under the tension of the tension spring 953, the V-wheel 951 continues to rotate, eventually completing a 180-degree rotation. This allows the magnetic attraction structure 956 between the two ends of the baffle plate 955 and the discharge port 94 to re-engage. This completes the repositioning of the two sides of the baffle plate 955. When the discharge port 94 engages with the heat-conducting component 84 again, the push rod 954 is located on the other side of the limit stop 957. As the rotating arm 963 swings, the push rod 954 collides with the limit stop 957. Under the action of inertial force, the limit stop 957 pushes and the push rod 954 rotates in the opposite direction. Similarly, the tension spring 953 and the magnetic attraction structure 956 complete the reset.

[0043] In this way, during continuous welding, the V-shaped wheel 951 is flipped to expose the material at the end that mates with the paste discharge port 94. This material is then heated and melted by the heat-conducting component 84 for auxiliary welding. After welding is completed, the wheel is flipped again for replenishment. This process is repeated to ensure that the material is the same each time. Combined with the solder wire feeding mechanism 6, this makes the solder joints of the repaired NG products similar in condition, thus solving the problem of excessive differences in solder joints on the repaired NG protection boards and facilitating their subsequent integration into automated production lines.

[0044] As one embodiment of the present invention, such as Figure 2 As shown: The solder wire feeding mechanism 6 includes a wire feeding mechanism 62 fixed on the connecting plate 4, a wire spool support mechanism 61 above the wire feeding mechanism 62, and a solder wire limiting mechanism 63 fixed on one side of the fixing block 83.

[0045] In actual operation, the wire feeding mechanism 62 is equipped with a servo motor. The solder wire passes through the wire feeding mechanism 62 and enters the solder wire limiting mechanism 63. During welding, the soldering pen 82 first contacts the solder joint to heat the contact point and melt the solder paste, allowing it to flow into the solder joint for wetting. Then, the wire feeding mechanism 62 drives the solder wire to supply solder for welding.

[0046] Working principle: Control the external air pipe of the sealing connection seat 92, and install an air pressure valve on the air pipe to control its air pressure, so that the discharge port 94 is filled with solder paste.

[0047] During continuous welding, after completing one welding operation, materials are prepared for the next welding operation. During this period, the Z-axis moving mechanism 5 retracts, which first drives the fixed clamping block 71 to rise and the limiting block 74 fixed on the fixed clamping block 71 to rise. Gradually, the limiting block 74 is brought closer to the micro-motion slide 72, and then the micro-motion slide 72 is pulled up together. As the limiting block 74 gradually moves from the welding position to the micro-motion slide 72, the connecting shaft 966 is pulled. The connecting rod between the connecting shaft 966 and the rotating support 962 is stretched to the same straight line, thereby pulling the shaft hole end of the rotating arm 963, causing the middle rotating arm 963 to rotate clockwise around the rotating support 962, so that the solder paste hopper 93 and the discharge port 94 fixed at the lower end of the rotating arm 963 are moved away from the heat-conducting component 84.

[0048] Push rod 954 is pushed by limit stop 957, causing V-wheel 951 to rotate around its center. Simultaneously, the rotating pull rod 952 fixed to the other end of V-wheel 951 rotates synchronously. After limit stop 957 pushes push rod 954, V-wheel 951, and rotating pull rod 952 to rotate a certain angle, push rod 954 gradually disengages from limit stop 957. Under the tension of spring 953, V-wheel 951 continues to rotate, eventually completing a 180-degree rotation. This allows the magnetic attraction structure 956 between the two ends of baffle plate 955 and discharge port 94 to re-engage. This completes the repositioning of the two sides of baffle plate 955. The side discharging material is rotated into discharge port 94 for material filling in preparation for the next welding operation.

[0049] During the re-welding process, when the soldering pen 82 stops moving after touching the bottom, the connecting shaft 966 continues to press down under the action of the limiting block 74. At this time, the connecting rod between the connecting shaft 966 and the rotating support 962 is compressed and deflected. Taking the shaft hole of the rotating arm 963 as the deflection point, the rotating arm 963 rotates counterclockwise around the rotating support 962, so that the solder paste hopper 93 and the discharge port 94 fixed at the lower end of the rotating arm 963 are close to the heat-conducting component 84, until the discharge port 94 engages with the heat-conducting component 84. During this process, the push rod 954 is located on the other side of the limiting stop 957. As the rotating arm 963 swings, the push rod 954 collides with the limiting stop 957. Under the action of inertial force, the limiting stop 957 pushes and the push rod 954 rotates in the opposite direction. Similarly, the tension spring 953 and the magnetic attraction structure 956 complete the reset, carrying out the solder paste for welding.

[0050] In this way, during continuous welding, the V-shaped wheel 951 is flipped to expose the material at the end that mates with the paste discharge port 94. This material is then heated and melted by the heat-conducting component 84 for auxiliary welding. After welding is completed, the wheel is flipped again for replenishment. This process is repeated to ensure that the material is the same each time. Combined with the solder wire feeding mechanism 6, this makes the solder joints of the repaired NG products similar in condition, thus solving the problem of excessive differences in solder joints on the repaired NG protection boards and facilitating their subsequent integration into automated production lines.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A lithium battery protection board welding equipment, comprising a multi-axis gantry structure, a solder wire feeding mechanism (6) mounted on the multi-axis gantry structure, a solder pen adjustment mechanism (7) fixed at the output end of the multi-axis gantry structure, and a solder pen clamping mechanism (8) mounted on the solder pen adjustment mechanism (7), characterized in that: It also includes solder paste supply organizations (9); The soldering pen clamping mechanism (8) includes a soldering pen holder (81) fixed on the soldering pen adjustment mechanism (7), a soldering pen (82) fixed inside the soldering pen holder (81), a fixing block (83) fixed on the outer wall of the soldering pen (82), one end of the fixing block (83) cooperating with the solder wire feeding mechanism (6), and the other end cooperating with the solder paste supply mechanism (9); The solder paste supply mechanism (9) includes a swing arm mechanism (96) that cooperates with the solder pen clamping mechanism (8), which plays a supporting role. A solder paste hopper (93) is fixed below the swing arm mechanism (96). A solder paste tube (91) is provided on one side of the solder paste hopper (93). A sealing connection seat (92) is provided above the solder paste tube (91). The sealing connection seat (92) presses the solder paste inside into the solder paste hopper (93) through an external air supply device. A discharge port (94) is provided below the solder paste hopper (93). The soldering pen clamping mechanism (8) also includes a heat-conducting component (84) fixed on the soldering pen (82) welding head, which is a cooperating mechanism with the paste discharge port (94). By transferring the heat of the soldering pen (82), the paste flux at the paste discharge port (94) is heated, so that it melts and flows into the welding position along the guide structure for auxiliary welding.

2. The lithium battery protection board welding equipment according to claim 1, characterized in that: The multi-axis gantry mechanism includes a controller (1), which is the control system integration of the welding equipment. A carrier platform (2) is provided at the center of the controller (1). A gantry is provided on the upper surface of the controller (1). An X-axis moving mechanism (3) is fixed on the gantry. A connecting plate (4) is fitted on the X-axis moving mechanism (3). A Z-axis moving mechanism (5) is fixedly installed on the connecting plate (4). A solder wire feeding mechanism (6) is fixed on one side of the Z-axis moving mechanism (5). A solder pen adjustment mechanism (7) is fixedly connected to the end output shaft of the Z-axis moving mechanism (5).

3. The lithium battery protection board welding equipment according to claim 2, characterized in that: The Z-axis moving mechanism (5) includes a lead screw mechanism (51) fixed on the connecting plate (4), a sliding connection mechanism (52) slidably fitted on the lead screw mechanism (51), a limit support mechanism (53) sleeved on one side of the sliding connection mechanism (52), and the two ends of the limit support mechanism (53) are fixedly connected to the connecting plate (4) through a fixing plate. A sliding rod (54) is rotatably fitted on the other side of the sliding connection mechanism (52), and a rotating mechanism (55) for driving the sliding rod (54) to rotate is fitted on the sliding rod (54). The end of the sliding rod (54) is fixedly engaged with the soldering pen adjustment mechanism (7).

4. The lithium battery protection board welding equipment according to claim 1, characterized in that: The heat-conducting assembly (84) includes a limiting sleeve (841) fixed to the heating head of the soldering pen (82) by bolts. A heat-conducting plate (842) is fixedly welded to one side of the limiting sleeve (841). Fixed crossbars are welded to both sides of the heat-conducting plate (842). A guide groove (843) is fixedly welded to one end of the fixed crossbar at the position corresponding to the heat-conducting plate (842), and the bottom of the guide groove (843) extends toward the landing point of the soldering pen (82).

5. The lithium battery protection board welding equipment according to claim 4, characterized in that: The upper end face of the guide channel (843) and the discharge port (94) are a mating mechanism. The end of the discharge port (94) is fixed with a baffle (941) that mates with the guide channel (843). The baffle (941) fits into the guide channel (843) to position and install the solder paste supply mechanism (9). The heat is conducted through the heat conduction plate (842) to heat the solder paste flowing out of the discharge port (94) and melt it, so that it flows along the guide channel (843) to the welding position.

6. The lithium battery protection board welding equipment according to claim 5, characterized in that: The welding pen adjustment mechanism (7) includes a fixed clamping block (71) fixed to the Z-axis moving mechanism (5) by bolts. A micro-motion slide (72) is fixed on the fixed clamping block (71). A linear slide rail and a slider structure are assembled between the micro-motion slide (72) and the fixed clamping block (71). A limiting block (74) for limiting the micro-motion slide (72) is fixed at the bottom of the fixed clamping block (71). An angle adjustment plate (73) for fixing the welding pen clamping mechanism (8) is fixed on the micro-motion slide (72).

7. The lithium battery protection board welding equipment according to claim 6, characterized in that: The swing arm mechanism (96) includes a swing arm fixing plate (961) fixed on one side of the fixing block (83). The swing arm fixing plate (961) has a waist hole, and a rotating support (962) is fixedly installed in the waist hole by bolts. A rotating arm (963) is rotatably fitted on the outer wall of the rotating support (962). The lower end of the rotating arm (963) is fixedly connected to the solder paste tank (93). The upper end of the rotating arm (963) is eccentrically provided with a shaft hole, and a sliding hinge seat (964) is rotatably fitted in the shaft hole. An elastic bushing (965) is fitted above the sliding hinge seat (964). A connecting shaft (966) is rotatably fitted above the elastic bushing (965), and the connecting shaft (966) is fixedly connected to the limiting block (74).

8. The lithium battery protection board welding equipment according to claim 7, characterized in that: The sliding hinge seat (964) and the elastic bushing (965) are in sliding engagement. The sliding hinge seat (964) is provided with a pin hole, and the elastic bushing (965) is provided with a waist hole corresponding to the pin hole. The elastic bushing (965) and the sliding hinge seat (964) are in sliding engagement through a pin limit. A compression spring is provided between the inner hole of the sliding hinge seat (964) and the elastic bushing (965).

9. The lithium battery protection board welding equipment according to claim 8, characterized in that: The solder paste supply mechanism (9) also includes a discharge valve (95). The discharge valve (95) includes a V-shaped wheel (951) rotatably fitted to the discharge port (94). A rotating pull rod (952) and a push rod (954) are fixedly connected to both ends of the rotating shaft of the V-shaped wheel (951). A tension spring (953) is provided at both ends of the rotating pull rod (952) in an equilateral triangle geometric relationship with a point on the side of the discharge port (94). A baffle plate (955) is provided in the V-groove of the V-shaped wheel (951), and the baffle plate (955) divides the V-groove equally. A magnetic attraction structure (956) is provided between both ends of the baffle plate (955) and the discharge port (94). A limiting stop rod (957) is provided below the push rod (954) for pushing the push rod (954) to rotate, and one end of the limiting stop rod (957) is fixedly welded to the guide groove (843).

10. The lithium battery protection board welding equipment according to claim 1, characterized in that: The tin wire feeding mechanism (6) includes a wire feeding mechanism (62) fixed on the connecting plate (4), a wire spool support mechanism (61) is provided above the wire feeding mechanism (62), and a tin wire limiting mechanism (63) is fixed on one side of the fixed block (83).

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