An automatic welding device and a welding detection method

Abstract

The present application relates to a kind of automatic welding device and welding detection method, belong to automatic welding technical field, solve the existing automatic welding device welding photovoltaic module junction box and easily appear large quantities of diode breakdown abnormality problem.The automatic welding device of the present application includes: welding mechanism and quality detection component, welding mechanism includes: first welding head, second welding head and position switch, first welding head and second welding head can be moved along preset direction to simultaneously with the welding site of both ends of target diode contact and carry out welding, position switch carries out corresponding opening and closing action according to the position of first welding head and second welding head;Quality detection component is used to output reverse voltage, quality detection component includes: for controlling the linkage switch of reverse voltage output, linkage switch is linked between position switch.Setting.It is realized that the quality of diode is detected in time after welding, detection efficiency is high, it is favorable to improve production efficiency, reduce the outflow risk of quality unqualified product.

Description

Technical Field

[0001] This invention relates to the field of automatic welding technology, and in particular to an automatic welding apparatus and a welding inspection method. Background Technology

[0002] Photovoltaic module junction boxes (hereinafter referred to as junction boxes) are welded using automated welding equipment. While dual-head automated welding equipment can improve welding efficiency, the close proximity of the two welding heads when welding diodes poses a risk of diode breakdown. Currently, automated welding equipment can only monitor the solder joint bonding effect and cannot comprehensively, quickly, or effectively monitor or identify diode breakdown or other damage. Furthermore, detecting diode breakdown is performed after welding, sending the welded junction boxes to an EL (electroluminescence) tester. However, EL testing typically takes more than 4 hours. If the welding equipment malfunctions during this time, it can cause a large number of defective photovoltaic module junction boxes, leading to mass rework or defective junction boxes entering the market. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide an automatic welding device and a welding inspection method to solve the problem that existing automatic welding devices easily cause a large number of diode breakdown anomalies when welding photovoltaic module junction boxes.

[0004] On one hand, the present invention provides an automatic welding device, the automatic welding device comprising: a welding mechanism and a quality inspection component,

[0005] The welding mechanism includes a first welding head, a second welding head, and a position switch. The first welding head and the second welding head can move along a preset direction to simultaneously contact and weld the welding parts at both ends of the target diode. The position switch performs corresponding opening and closing actions according to the positions of the first welding head and the second welding head.

[0006] The quality detection component is used to output a reverse voltage. The quality detection component includes a linkage switch for controlling the reverse voltage output, the linkage switch being linked to the position switch.

[0007] The linkage between the linkage switch and the position switch enables the quality inspection component to apply a reverse voltage to the welding points at both ends of the target diode after welding is completed, so as to perform continuity detection on the welded target diode.

[0008] Based on further improvements to the above-described device, the position switch includes: an upper magnetic switch and a lower magnetic switch.

[0009] Both the upper magnetic switch and the lower magnetic switch are closed when triggered and open when not triggered; the lower magnetic switch is triggered when the first welding head and the second welding head contact the welding part, and the upper magnetic switch is triggered when the first welding head and the second welding head move to a preset position in a direction away from the welding part.

[0010] The linkage switch includes a first linkage switch and a second linkage switch. When both the first linkage switch and the second linkage switch are closed, the quality detection component outputs a reverse voltage.

[0011] The first linkage switch is linked with the lower magnetic switch. When the lower magnetic switch is open, the first linkage switch is closed, and when the lower magnetic switch is closed, the first linkage switch is open. The second linkage switch is linked with the upper magnetic switch. When the upper magnetic switch is open, the second linkage switch is closed, and when the upper magnetic switch is closed, the second linkage switch is open.

[0012] Based on further improvements to the above-mentioned device, the quality detection component further includes: a voltage source, a current detection element, a first test probe, and a second test probe. The voltage source and the current detection element are connected in series between the first test probe and the second test probe via a circuit. The linkage switch is disposed on the circuit between the first test probe and the second test probe.

[0013] The first test probe and the second test probe are used to contact the solder joints at both ends of the target diode, so that the voltage source applies a reverse voltage to the solder joints at both ends of the target diode.

[0014] Based on further improvements to the above-described device, the quality detection component further includes: a first drive mechanism and a second drive mechanism.

[0015] The first driving mechanism is connected to the first test probe to drive the first test probe to contact or leave the welding area;

[0016] The second drive mechanism is connected to the second test probe to drive the second test probe to contact or leave the welding area.

[0017] Based on further improvements to the above-mentioned device, the welding mechanism further includes: a third driving mechanism and a fourth driving mechanism.

[0018] The third driving mechanism is connected to the first welding head to drive the first welding head to contact or leave the welding area;

[0019] The fourth driving mechanism is connected to the second welding head to drive the second welding head to contact or leave the welding area.

[0020] Based on further improvements to the above-mentioned device, the driving end of the first driving mechanism is provided with a first mounting plate, and the first test probe and the third driving mechanism are both provided on the first mounting plate.

[0021] The second driving mechanism has a second mounting plate at its driving end, and both the second test probe and the fourth driving mechanism are mounted on the second mounting plate.

[0022] Based on a further improvement of the above device, the first test probe is elastically connected to the first mounting plate by a first spring, and the second test probe is elastically connected to the second mounting plate by a second spring.

[0023] Based on further improvements to the above-mentioned device, the automatic welding device further includes: a voltage detection element, which is connected between the first welding head and the second welding head to detect the induced pressure difference between the first welding head and the second welding head;

[0024] During welding operations, when the voltage detection element detects that the induced voltage difference exceeds the voltage threshold, it controls the first welding head and the second welding head to detach from the welding area to stop welding.

[0025] Based on further improvements to the above device, an alarm module is provided on the voltage detection element.

[0026] When the voltage detection element detects that the induced voltage difference exceeds the voltage threshold, the alarm module issues an alarm signal.

[0027] On the other hand, the present invention provides a diode welding inspection method, which is implemented based on the automatic welding device described above, and the method includes the following steps:

[0028] The first welding head and the second welding head are simultaneously brought into contact with the welding parts at both ends of the target diode and welded.

[0029] After welding is completed, the first welding head and the second welding head are simultaneously moved to a preset position in a direction away from the welding part;

[0030] The position switch performs opening and closing actions according to the positions of the first welding head and the second welding head. The linkage switch is linked with the position switch, so that the quality detection component applies a reverse voltage to the welding parts at both ends of the target diode to perform continuity detection on the welded target diode.

[0031] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0032] 1. In this invention, by linking the linkage switch of the quality detection component and the position switch of the welding mechanism, the quality detection component can apply a reverse voltage for a preset time to the target diode after the two welding heads are separated from the welding position. This achieves automatic detection of the target diode after welding and avoids the simultaneous application of the induced voltage difference between the two welding heads and the reverse voltage of the quality detection component to the target diode, thus achieving a device protection effect.

[0033] 2. In this invention, considering the unidirectional conductivity of diodes, a diode quality detection component is formed by a voltage source, a current detection element, a first test probe, and a second test probe. This enables timely detection of diode quality after welding. The structure is simple, the detection efficiency is high, which helps to improve production efficiency and reduce the risk of defective products leaving the product.

[0034] 3. In this invention, the induced voltage difference between the two welding heads is monitored by a voltage detection element. When the induced voltage difference exceeds the voltage threshold, production is stopped in time, thereby reducing the risk of batch abnormalities in the diodes after welding.

[0035] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0036] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0037] Figure 1 This is a schematic diagram of the structure of the automatic welding device according to an embodiment of the present invention. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of the automatic welding device according to an embodiment of the present invention. Figure 2 ;

[0039] Figure 3 This is a schematic diagram of the detection circuit and switch linkage control in an embodiment of the present invention.

[0040] Figure label:

[0041] 1-First welding head; 2-Second welding head; 3-Voltage detection element;

[0042] 4-Target diode; 5-Soldering area; 6-First test probe;

[0043] 7-Second test probe; 8-Voltage source; 9-Current sensing element; 10-First drive mechanism;

[0044] 11-Second drive mechanism; 12-Third drive mechanism; 13-Fourth drive mechanism;

[0045] 14-First mounting plate; 15-Second mounting plate; 16-First spring; 17-Second spring;

[0046] KS1 - Upper magnetic switch; KS2 - Lower magnetic switch; KS3 - First linkage switch;

[0047] KS4 - Second linkage switch. Detailed Implementation

[0048] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0049] A specific embodiment of the present invention discloses an automatic welding device with dual welding heads, such as... Figure 1-3 As shown. The automatic welding device includes a welding mechanism and a quality inspection component. The welding mechanism includes a first welding head 1, a second welding head 2, and a position switch. The first welding head 1 and the second welding head 2 can move along a preset direction to simultaneously contact and weld the welding portions 5 at both ends of the target diode 4. The position switch performs corresponding opening and closing actions according to the positions of the first welding head 1 and the second welding head 2. The quality inspection component is used to output a reverse voltage. The quality inspection component includes a linkage switch for controlling the reverse voltage output, and the linkage switch is linked to the position switch.

[0050] The linkage between the linkage switch and the position switch enables the quality inspection component to apply a reverse voltage to the welding points at both ends of the target diode after welding is completed, so as to perform continuity detection on the welded target diode.

[0051] Compared with the prior art, in this embodiment of the invention, by linking the linkage switch of the quality detection component and the position switch of the welding mechanism, the quality detection component can apply a reverse voltage for a preset time to the target diode after the two welding heads are separated from the welding position. This achieves automatic detection of the diode after welding and avoids the simultaneous application of the induced voltage difference between the two welding heads and the reverse voltage of the quality detection component to the target diode, thus achieving a device protection effect.

[0052] It should be noted that position switches utilize the contact or non-contact triggering of mechanical moving parts to cause their contacts to open and close.

[0053] In a preferred embodiment, the position switch includes an upper magnetic switch KS1 and a lower magnetic switch KS2, both of which are closed when triggered and open when not triggered; the lower magnetic switch KS2 is triggered when the first welding head 1 and the second welding head 2 come into contact with the welding part 5, and the upper magnetic switch KS1 is triggered when the first welding head 1 and the second welding head 2 move to a preset position in a direction away from the welding part 5.

[0054] The linkage switches include a first linkage switch KS3 and a second linkage switch KS4. When both the first linkage switch KS3 and the second linkage switch KS4 are closed, the quality detection component outputs a reverse voltage. Specifically, the first linkage switch KS3 is linked with the lower magnetic switch KS2; when the lower magnetic switch KS2 is open, the first linkage switch KS3 is closed, and when the lower magnetic switch KS2 is closed, the first linkage switch KS3 is open. The second linkage switch KS4 is linked with the upper magnetic switch KS1; when the upper magnetic switch KS1 is open, the second linkage switch KS4 is closed, and when the upper magnetic switch KS1 is closed, the second linkage switch KS4 is open.

[0055] In this embodiment of the invention, an upper magnetic switch KS1, a lower magnetic switch KS2, a first linkage switch KS3, and a second linkage switch KS4 are provided. The opening and closing of the four switches are controlled based on the position of the welding head, so that the voltage source 8 of the quality detection component can apply a reverse voltage for a preset time to the target diode 4 after the two welding heads are separated from the welding part 5. This realizes automatic detection of the target diode 4 after welding is completed, and avoids the simultaneous application of the induced voltage difference between the two welding heads and the reverse voltage of the voltage source 8 to the target diode 4, thus achieving a device protection effect.

[0056] Specifically, when the first welding head 1 and the second welding head 2 contact and weld with the welding points 5 at both ends of the target diode 4, the lower magnetic switch KS2 is triggered and closed, while the upper magnetic switch KS1 is not triggered and is open. At this time, the first linkage switch KS3 is open and the second linkage switch KS4 is closed, thus the circuit of the quality detection component is disconnected. Similarly, when the first welding head 1 and the second welding head 2 detach from the welding points 5 at both ends of the target diode 4 and move to a preset position, the upper magnetic switch KS1 is triggered and closed, while the lower magnetic switch KS2 is not triggered and is open. At this time, the second linkage switch KS4 on the line between the two test probes is open, and the first linkage switch KS3 is closed, thus the circuit of the quality detection component is also disconnected. During the movement of the two welding heads away from the welding part 5 and before reaching the preset position, neither the lower magnetic switch KS2 nor the upper magnetic switch KS1 is triggered. At this time, both the first linkage switch KS3 and the second linkage switch KS4 are closed, and the circuit of the quality detection component is in a conducting state, so that the reverse voltage of the preset time can be applied to both ends of the target diode 4 to realize the instantaneous on / off detection of the target diode 4.

[0057] It should be noted that the circuit of the quality inspection component is only in a conductive state during the movement of the welding head between the welding part 5 and the preset position. Therefore, the time taken for the welding head to move from the welding part 5 to the preset position is the time for the reverse voltage to be applied across the target diode 4.

[0058] In one embodiment, the quality detection component includes: a voltage source 8, a current detection element 9, a first test probe 6, and a second test probe 7. The voltage source 8 and the current detection element 9 are connected in series between the first test probe 6 and the second test probe 7. The linkage switch is located on the line between the first test probe 6 and the second test probe 7. The first test probe 6 and the second test probe 7 are used to contact the solder joints 5 at both ends of the target diode 4, so that the voltage source 8 applies a reverse voltage to the solder joints 5 at both ends of the target diode 4.

[0059] In this invention, considering the unidirectional conductivity of diodes, a diode quality detection component is formed by a voltage source 8, a current detection element 9, a first test probe 6, and a second test probe 7. This enables timely detection of diode quality after welding, resulting in a simple structure, high detection efficiency, improved production efficiency, and reduced risk of defective products leaving the product.

[0060] Specifically, the voltage of the voltage source 8 should be less than the breakdown voltage of the diode. For example, the voltage of the voltage source 8 can be set according to the operating voltage of the diode, specifically 2V. More specifically, the voltage source 8 can be a battery, and the current sensing element 9 can be an ammeter.

[0061] Specifically, the quality inspection component further includes a first driving mechanism 10 and a second driving mechanism 11. The first driving mechanism 10 is connected to the first test probe 6 to drive the first test probe 6 to contact or leave the welding part 5; the second driving mechanism 11 is connected to the second test probe 7 to drive the second test probe 7 to contact or leave the welding part 5.

[0062] In this embodiment, each test probe is driven independently by a driving mechanism, which provides greater flexibility. When testing the quality of the soldered diode, the first driving mechanism 10 and the second driving mechanism 11 simultaneously drive the first test probe 6 and the second test probe 7 to contact the soldered portions 5 at both ends of the target diode 4 for quality inspection.

[0063] In addition, the two test probes can be driven by the same drive mechanism, making the structure simpler.

[0064] The welding mechanism further includes a third driving mechanism 12 and a fourth driving mechanism 13. The third driving mechanism 12 is connected to the first welding head 1 to drive the first welding head 1 to contact or leave the welding part 5. The fourth driving mechanism 13 is connected to the second welding head 2 to drive the second welding head 2 to contact or leave the welding part 5.

[0065] Similarly, in this embodiment, each welding head is driven independently by a driving mechanism, which provides greater flexibility. During welding, the third driving mechanism 12 and the fourth driving mechanism 13 simultaneously drive the first welding head 1 and the second welding head 2 to contact the welding portions 5 at both ends of the target diode 4 for welding.

[0066] In addition, the two welding heads can be driven by the same drive mechanism, making the structure simpler.

[0067] Specifically, the first driving mechanism 10 has a first mounting plate 14 at its driving end, and the first test probe 6 and the third driving mechanism 12 are both mounted on the first mounting plate 14; the second driving mechanism 11 has a second mounting plate 15 at its driving end, and the second test probe 7 and the fourth driving mechanism 13 are both mounted on the second mounting plate 15.

[0068] Among them, the first drive mechanism 10 and the second drive mechanism 11 are the main stroke drive mechanisms. Taking the first drive mechanism 10 and the third drive mechanism 12 as examples, in implementation, the first drive mechanism 10 first drives the first test probe 6, the third drive mechanism 12, and the first welding head 1 on the third drive mechanism 12 to move towards the welding part 5 until the first test probe 6 contacts the welding part 5. At this time, the first welding head 1 is at a preset position above the welding part 5. Then, the third drive mechanism 12 drives the first welding head 1 to move towards the welding part 5 to contact it, thereby performing welding. The operation process of the second drive mechanism 11 and the fourth drive mechanism 13 is the same as that of the first drive mechanism 10 and the third drive mechanism 12.

[0069] In this embodiment, before welding, the two test probes are brought into contact with the welding part 5. Since the circuit between the two test probes is in an open state at this time, it will not affect the welding operation of the welding head. After welding is completed, the circuit between the two test probes is automatically switched from an open state to a conductive state by the action of the welding head separating from the welding part 5, so as to realize the quality detection of the diode.

[0070] Preferably, the first test probe 6 is elastically connected to the first mounting plate 14 via a first spring 16, and the second test probe 7 is elastically connected to the second mounting plate 15 via a second spring 17. By providing springs, it is possible to ensure that the test probes are in close contact with the welding part 5 and to prevent damage to the test probes.

[0071] Specifically, the first drive mechanism 10, the second drive mechanism 11, the third drive mechanism 12 and the fourth drive mechanism 13 are all cylinders.

[0072] In one embodiment, the automatic welding device further includes a voltage detection element 3 connected between the first welding head 1 and the second welding head 2 to detect the induced voltage difference between the first welding head 1 and the second welding head 2. During welding operations, when the voltage detection element 3 detects that the induced voltage difference exceeds a voltage threshold, it controls the first welding head and the second welding head 2 to disengage from the welding position 5 to stop welding.

[0073] During implementation, applying an alternating voltage to the welding head will generate an alternating magnetic field. When the welding head experiences abnormalities such as main wire wear, an induced electromotive force will be generated between two welding heads in the same junction box due to their close proximity, resulting in a voltage difference. If the voltage difference between the two welding heads exceeds the voltage bearing range of the diode, it will cause the diode to break down.

[0074] Compared with the prior art, the present invention takes into account the above situation and monitors the induced voltage difference between the two welding heads by voltage detection element 3. When the induced voltage difference exceeds the voltage threshold, the welding operation is stopped in time, thereby reducing the risk of batch abnormalities of diodes after welding.

[0075] Specifically, the voltage detection element 3 is equipped with an alarm module. When the voltage detection element 3 detects that the induced voltage difference exceeds a voltage threshold, the alarm module issues an alarm signal. For example, the voltage detection element 3 can be a voltmeter with an alarm function. When the induced voltage difference exceeds the voltage threshold, an alarm signal is issued, allowing operators to promptly detect any abnormalities in the equipment and stop production in a timely manner.

[0076] On the other hand, embodiments of the present invention also provide a diode welding inspection method, the method being implemented based on the automatic welding device described above, the method comprising the following steps:

[0077] The first welding head and the second welding head are simultaneously brought into contact with the welding parts at both ends of the target diode and welded.

[0078] After welding is completed, the first welding head and the second welding head are simultaneously moved to a preset position in a direction away from the welding part;

[0079] The position switch performs opening and closing actions according to the positions of the first welding head and the second welding head. The linkage switch is linked with the position switch, so that the quality detection component applies a reverse voltage to the welding parts at both ends of the target diode to perform continuity detection on the welded target diode.

[0080] In one specific embodiment, the method includes the following steps:

[0081] Step 1: Make the first test probe 6 and the second test probe 7 contact the soldering parts 5 at both ends of the target diode 4 respectively, and disconnect the line between the first test probe 6 and the second test probe 7.

[0082] Step 2: Make the first welding head 1 and the second welding head 2 simultaneously contact the welding parts 5 at both ends of the target diode 4 and perform welding;

[0083] Step 3: After welding is completed, the first welding head 1 and the second welding head 2 are simultaneously detached from the welding parts 5 at both ends of the target diode 4.

[0084] Step 4: After disconnection, make the line between the first test probe 6 and the second test probe 7 conductive, so that the voltage source 8 applies reverse voltage to the solder joint 5 at both ends of the target diode 4.

[0085] Step 5: Determine whether the target diode 4 is damaged based on the current value displayed by the current detection element 9. If the current detection unit detects a current value, the diode is damaged; if the current detection unit does not detect a current value, the diode is not damaged.

[0086] Compared with existing technologies, this invention, considering the unidirectional conductivity of diodes, uses a diode quality detection assembly composed of a voltage source 8, a current detection element 9, a first test probe 6, and a second test probe 7 to achieve timely detection of diode quality after welding. Specifically, before welding, the two probes are brought into contact with the welding area 5, and the circuit between the two test probes is broken. After welding, the circuit between the two probes is then made conductive, enabling instantaneous continuity detection of the diode. This design is simple, highly efficient, and beneficial for improving production efficiency and reducing the risk of defective products leaving the product.

[0087] Specifically, the following method is used to control the disconnection and continuity of the circuit between the first test probe 6 and the second test probe 7:

[0088] An upper magnetic switch KS1 and a lower magnetic switch KS2 are configured. The lower magnetic switch KS2 is set to be triggered when the first welding head 1 and the second welding head 2 come into contact with the welding part 5. The upper magnetic switch KS1 is set to be triggered when the first welding head 1 and the second welding head 2 move away from the welding part 5 to a preset position. Both the upper magnetic switch KS1 and the lower magnetic switch KS2 are closed when triggered and open when not triggered.

[0089] A first linkage switch KS3 and a second linkage switch KS4 are provided on the line between the first test probe 6 and the second test probe 7.

[0090] The first linkage switch KS3 is linked with the lower magnetic switch KS2. When the lower magnetic switch KS2 is open, the first linkage switch KS3 is closed, and when the lower magnetic switch KS2 is closed, the first linkage switch KS3 is open.

[0091] The second linkage switch KS4 is linked with the upper magnetic switch KS1. When the upper magnetic switch KS1 is open, the second linkage switch KS4 is closed, and when the upper magnetic switch KS1 is closed, the second linkage switch KS4 is open.

[0092] In this embodiment of the invention, an upper magnetic switch KS1, a lower magnetic switch KS2, a first linkage switch KS3, and a second linkage switch KS4 are provided. The opening and closing of the four switches are controlled based on the position of the welding head, so that the voltage source 8 of the quality detection component can apply a reverse voltage for a preset time to the target diode 4 after the two welding heads are separated from the welding part 5. This realizes automatic detection of the target diode 4 after welding is completed, and avoids the simultaneous application of the induced voltage difference between the two welding heads and the reverse voltage of the voltage source 8 to the target diode 4, thus achieving a device protection effect.

[0093] Furthermore, the automatic welding device and welding inspection method of the present invention are applicable not only to the welding of components in the junction box of photovoltaic modules, but also to other half-cell modules.

[0094] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0095] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic welding device, characterized in that, The automatic welding device includes: a welding mechanism and a quality inspection component. The welding mechanism includes a first welding head, a second welding head, and a position switch. The first welding head and the second welding head can move along a preset direction to simultaneously contact and weld the welding parts at both ends of the target diode. The position switch performs corresponding opening and closing actions according to the positions of the first welding head and the second welding head. The quality detection component is used to output a reverse voltage. The quality detection component includes a linkage switch for controlling the reverse voltage output, the linkage switch being linked to the position switch. The linkage between the linkage switch and the position switch enables the quality inspection component to apply a reverse voltage to the welding points at both ends of the target diode after welding is completed, so as to perform continuity detection on the welded target diode. The position switch includes: an upper magnetic switch and a lower magnetic switch. Both the upper magnetic switch and the lower magnetic switch are closed when triggered and open when not triggered; the lower magnetic switch is triggered when the first welding head and the second welding head contact the welding part, and the upper magnetic switch is triggered when the first welding head and the second welding head move to a preset position in a direction away from the welding part. The linkage switch includes a first linkage switch and a second linkage switch. When both the first linkage switch and the second linkage switch are closed, the quality detection component outputs a reverse voltage. The first linkage switch is linked with the lower magnetic switch. When the lower magnetic switch is open, the first linkage switch is closed, and when the lower magnetic switch is closed, the first linkage switch is open. The second linkage switch is linked with the upper magnetic switch. When the upper magnetic switch is open, the second linkage switch is closed, and when the upper magnetic switch is closed, the second linkage switch is open. The quality detection component further includes: a voltage source, a current detection element, a first test probe, and a second test probe. The voltage source and the current detection element are connected in series between the first test probe and the second test probe via a circuit. The linkage switch is set on the circuit between the first test probe and the second test probe. The first test probe and the second test probe are used to contact the solder joints at both ends of the target diode, so that the voltage source applies a reverse voltage to the solder joints at both ends of the target diode. The automatic welding device further includes a voltage detection element connected between the first welding head and the second welding head to detect the induced pressure difference between the first welding head and the second welding head. During welding operations, when the voltage detection element detects that the induced voltage difference exceeds the voltage threshold, the first welding head and the second welding head disengage from the welding area to stop welding.

2. The automatic welding device according to claim 1, characterized in that, The quality inspection component further includes: a first drive mechanism and a second drive mechanism; The first driving mechanism is connected to the first test probe to drive the first test probe to contact or leave the welding area; The second drive mechanism is connected to the second test probe to drive the second test probe to contact or leave the welding area.

3. The automatic welding device according to claim 2, characterized in that, The welding mechanism further includes: a third drive mechanism and a fourth drive mechanism. The third driving mechanism is connected to the first welding head to drive the first welding head to contact or leave the welding area; The fourth driving mechanism is connected to the second welding head to drive the second welding head to contact or leave the welding area.

4. The automatic welding device according to claim 3, characterized in that, The first driving mechanism has a first mounting plate at its driving end, and both the first test probe and the third driving mechanism are mounted on the first mounting plate. The second driving mechanism has a second mounting plate at its driving end, and both the second test probe and the fourth driving mechanism are mounted on the second mounting plate.

5. The automatic welding device according to claim 4, characterized in that, The first test probe is elastically connected to the first mounting plate via a first spring, and the second test probe is elastically connected to the second mounting plate via a second spring.

6. The automatic welding apparatus according to claim 5, characterized in that, The voltage detection element is equipped with an alarm module. When the voltage detection element detects that the induced voltage difference exceeds the voltage threshold, the alarm module issues an alarm signal.

7. A method for inspecting the welding of diodes, characterized in that, The method is implemented based on the automatic welding apparatus according to any one of claims 1-6, and the method includes the following steps: The first welding head and the second welding head are simultaneously brought into contact with the welding parts at both ends of the target diode and welded. After welding is completed, the first welding head and the second welding head are simultaneously moved to a preset position in a direction away from the welding part; The position switch performs opening and closing actions according to the positions of the first welding head and the second welding head. The linkage switch is linked with the position switch, so that the quality detection component applies a reverse voltage to the welding parts at both ends of the target diode to perform continuity detection on the welded target diode.

Images