Bus bar pressing mechanism and junction box welding machine

Abstract

The utility model provides a bus bar pressing mechanism and a junction box welding machine. The bus bar pressing mechanism comprises a lifting driving mechanism, a mounting support, a first pressing assembly, a second pressing assembly, a first power-on assembly and a second power-on assembly, wherein the first pressing assembly, the second pressing assembly, the first power-on assembly and the second power-on assembly are arranged on the mounting support. And the mounting bracket is connected to the lifting driving mechanism. The first power-on assembly and the second power-on assembly are electrically connected with the positive electrode and the negative electrode of the power supply respectively. The lifting driving mechanism drives the mounting support to descend so as to drive the first pressing assembly, the second pressing assembly, the first power-on assembly and the second power-on assembly to descend synchronously. The first pressing assembly and the second pressing assembly respectively press one bus bar to the corresponding conducting strip. And the first power-on assembly and the second power-on assembly are respectively crimped on the corresponding conducting strips or bus bars so as to electrify the diodes. According to the bus bar pressing mechanism, the two bus bars on the battery string assembly can be pressed onto the conducting strips, and the diodes between the conducting strips can be electrified, so that detection of the diodes is implemented.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production, and specifically to a busbar pressing mechanism and a junction box welding machine. Background Art

[0002] After the cell string array and the glass plate are laminated and bonded together to form a cell string assembly, the junction box needs to be welded to the cell string assembly to make the final photovoltaic module. The junction box welding includes the following process: fix the junction box to the cell string assembly and allow the two bus bars on the cell string assembly to pass into the junction box; then, press the two bus bars onto the conductive sheet of the junction box; finally, weld the two bus bars to the corresponding conductive sheets.

[0003] A diode is connected between the two conductive sheets of the junction box. Before welding the junction box, the diode needs to be tested before welding to determine whether the diode is broken down or connected in reverse. If the diode is broken down or connected in reverse, the junction box needs to be replaced. In addition, the high temperature shock generated during the welding of the junction box may damage the diode and cause the diode to be broken down. Therefore, after the junction box welding is completed, the diode needs to be tested after welding to determine whether the diode is broken down.

[0004] Currently, the pre-welding and post-welding inspections of diodes are performed by specialized diode inspection equipment. Therefore, battery string components need to be transported back and forth between the diode inspection equipment and the junction box welding machine, which reduces the junction box welding efficiency and increases the equipment cost. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a busbar clamping mechanism, which adopts the following technical solutions:

[0006] A busbar pressing mechanism is used to press two busbars on a battery string assembly onto two conductive sheets in a junction box in a one-to-one correspondence, with a diode connected between the two conductive sheets. The busbar pressing mechanism includes a lifting drive mechanism, a mounting bracket, and a first pressing assembly, a second pressing assembly, a first power-on assembly, and a second power-on assembly arranged on the mounting bracket, wherein:

[0007] The mounting bracket is connected to the movable part of the lifting drive mechanism;

[0008] One of the first power-on component and the second power-on component is electrically connected to the positive pole of the power source, and the other of the first power-on component and the second power-on component is electrically connected to the negative pole of the power source;

[0009] The lifting drive mechanism is configured to drive the mounting bracket to descend, so as to drive the first clamping assembly, the second clamping assembly, the first power-on assembly and the second power-on assembly to descend synchronously;

[0010] The first pressing assembly and the second pressing assembly are configured to respectively press a bus bar onto a corresponding conductive sheet;

[0011] The first power-on component and the second power-on component are configured to be respectively crimped onto a corresponding one of the conductive sheets or the bus bar to energize the diode.

[0012] The busbar pressing mechanism provided in the present application is provided with a first power-on assembly and a second power-on assembly, so the busbar pressing mechanism provided in the present application can not only press the two busbars on the battery string assembly onto the two conductive sheets, but also energize the diode connected between the two conductive sheets, thereby testing the diode. The present application improves the welding efficiency of the junction box and reduces the equipment cost.

[0013] In some embodiments, the positive and negative poles of the power supply are configured to be able to implement exchange electrical connections with the first power-on component and the second power-on component; when the first power-on component is electrically connected to the positive pole of the power supply, the second power-on component is electrically connected to the negative pole of the power supply, and the first power-on component and the second power-on component implement forward power supply to the diode; when the first power-on component is electrically connected to the negative pole of the power supply, the second power-on component is electrically connected to the positive pole of the power supply, and the first power-on component and the second power-on component implement reverse power supply to the diode.

[0014] Since the positive and negative poles of the power supply can be electrically connected to the first power-on component and the second power-on component in an interchangeable manner, the first power-on component and the second power-on component can cooperate to complete two power-on tests on the diode. Based on the structure of the two power-on tests, it can be determined whether the diode is broken down and whether the diode is connected reversely.

[0015] In some embodiments, the busbar clamping mechanism also includes an intermediate relay and a PLC controller, the first power-on component and the second power-on component are electrically connected to the two output ends of the intermediate relay respectively, the two input ends of the intermediate relay are electrically connected to the positive and negative poles of the power supply respectively, and the intermediate relay is also electrically connected to the PLC controller; the intermediate relay includes a first group of contacts and a second group of contacts, and when the PLC controller controls the normally open end in the first group of contacts and the normally open end in the second group of contacts to be electrically connected to the power supply, the first power-on component is electrically connected to the positive pole of the power supply, and the second power-on component is electrically connected to the negative pole of the power supply; the PLC controller controls the normally closed end of the first group of contacts of the intermediate relay When the normally closed end of the first group of contacts and the normally closed end of the second group of contacts are electrically connected to the power supply, the first power-on component is electrically connected to the negative pole of the power supply, and the second power-on component is electrically connected to the positive pole of the power supply; or, the intermediate relay includes a first group of contacts and a second group of contacts, and when the PLC controller controls the normally closed end of the first group of contacts and the normally closed end of the second group of contacts to be electrically connected to the power supply, the first power-on component is electrically connected to the positive pole of the power supply, and the second power-on component is electrically connected to the negative pole of the power supply; when the PLC controller controls the normally open end of the first group of contacts and the normally open end of the second group of contacts of the intermediate relay to be electrically connected to the power supply, the first power-on component is electrically connected to the negative pole of the power supply, and the second power-on component is electrically connected to the positive pole of the power supply.

[0016] It can be seen that through the coordinated control of the intermediate relay and the PLC controller, the positive and negative electrodes of the power supply are electrically connected to the first power-on component and the second power-on component in an alternating manner, thereby improving the detection efficiency of the diode.

[0017] In some embodiments, the first clamping assembly includes a first buffer connector and a first pressing claw, wherein the first buffer connector is mounted on a mounting bracket and the first pressing claw is mounted on a movable part of the first buffer connector; the second clamping assembly includes a second buffer connector and a second pressing claw, wherein the second buffer connector is mounted on a mounting bracket and the second pressing claw is mounted on a movable part of the second buffer connector; the first power-on assembly is connected to the movable part of the first buffer connector, the second power-on assembly is connected to the movable part of the second buffer connector, and the first power-on assembly and the first pressing claw are insulated from each other from the second power-on assembly and the second pressing claw; when the first pressing claw and the second pressing claw press the bus bar to the corresponding conductive sheet, the first power-on assembly and the second power-on assembly are crimped onto the corresponding conductive sheet or bus bar.

[0018] Since the first pressing claw and the first power-on component are connected to the movable part of the first buffer connector, and the second pressing claw and the second power-on component are connected to the second buffer connector, when there is a height difference between the two conductive sheets on the junction box, the first buffer connector and the second buffer connector can be adaptively adjusted to ensure that the first pressing claw and the second pressing claw can both press the busbar to the corresponding conductive sheet, and the first power-on component and the second power-on component can both be crimped to the corresponding conductive sheet or busbar. In addition, since the first power-on component and the first pressing claw are insulated from the second power-on component and the second pressing claw, the conductive sheets on both sides can be prevented from short-circuiting when power is turned on, ensuring that the first power-on component and the second power-on component can implement forward or reverse power-on of the diode.

[0019] In some embodiments, the first buffer connector and the second buffer connector have the same structure; the first buffer connector includes a first cylinder and an adapter plate, the first cylinder is mounted on a mounting bracket, the adapter plate is connected to the lower end of the telescopic rod of the first cylinder, and the first pressure claw and the first power-on component are arranged on the adapter plate; or, the first buffer connector includes a guide rod, a spring and an adapter plate, wherein the guide rod is connected to the mounting bracket in a vertical direction, the adapter plate is mounted on the guide rod, the spring is sleeved on the guide rod, the guide rod guides the up and down floating of the adapter plate, the first pressure claw and the first power-on component are arranged on the adapter plate, and the spring applies downward pressure to the adapter plate; when the first pressure claw presses the bus bar onto the corresponding conductive sheet, the spring contracts under pressure.

[0020] By setting the first buffer connector and the second buffer connector, when the first pressing claw and the second pressing claw press the bus bar onto the corresponding conductive sheet, the first buffer connector and the second buffer connector can be retracted upward, thereby ensuring that the first pressing claw and the second pressing claw can press the bus bar onto the corresponding conductive sheet, and the first power-on component and the second power-on component can be crimped onto the corresponding conductive sheet or bus bar.

[0021] In some embodiments, the first power-on component includes a first probe, the upper end of which is connected to the movable part of the first buffer connector, and the first probe is electrically connected to one of the positive and negative electrodes of the power supply; the second power-on component includes a second probe, the upper end of which is connected to the movable part of the second buffer connector, and the second probe is electrically connected to the other of the positive and negative electrodes of the power supply; when the first pressing claw and the second pressing claw press the bus bar onto the corresponding conductive sheet, the first probe and the second probe are crimped onto the corresponding conductive sheet or bus bar.

[0022] Using a probe as a power-on component can, on the one hand, ensure effective electrical contact with the conductive sheet, ultimately ensuring the power-on effect of the diode; on the other hand, the probe is a slender needle-like structure, which has little obstruction to the bus bar and the conductive sheet, and will not interfere with the welding of the welding mechanism.

[0023] In some embodiments, the first power-on component includes a first lifting portion and a third probe, wherein the first lifting portion is mounted on a mounting bracket, the third probe is connected to a driving end of the first lifting portion and is electrically connected to one of a positive pole and a negative pole of a power source; the first lifting portion is used to drive the third probe to lift and lower, so as to drive the third probe to crimp or detach from a corresponding conductive sheet or bus bar; the second power-on component includes a second lifting portion and a fourth probe, wherein the second lifting portion is mounted on a mounting bracket, the fourth probe is connected to a driving end of the second lifting portion and is electrically connected to the other of a positive pole and a negative pole of a power source; the second lifting portion is used to drive the fourth probe to lift and lower, so as to drive the fourth probe to crimp or detach from a corresponding conductive sheet or bus bar; at least the third probe and the fourth probe are insulated from each other.

[0024] Since the third probe is independently driven by the first lifting part and the fourth probe is independently driven by the second lifting part, the first power-on component does not need to be pressed down to the corresponding conductive sheet synchronously with the first pressing component, and the second power-on component does not need to be pressed down to the corresponding conductive sheet synchronously with the second pressing component. The third probe and the fourth probe can be separately lowered to energize the diode before the first pressing component and the second pressing component press the bus bar, thereby improving the flexibility of the first power-on component and the second power-on component. Since the third probe and the fourth probe are insulated from each other, the conductive sheets on both sides can be prevented from being short-circuited when the third probe and the fourth probe are energized, thereby ensuring that the third probe and the fourth probe can energize the diode in the forward or reverse direction.

[0025] In some embodiments, the first lifting part and the second lifting part have the same structure, the first lifting part includes a second cylinder and a mounting plate, wherein the second cylinder is mounted on a mounting bracket, the mounting plate is connected to the driving end of the second cylinder, and the third probe is mounted on the mounting plate.

[0026] A lifting part structure with simple structure and stable driving is provided, which can drive the first probe or the second probe to be pressed down onto the corresponding conductive sheet or bus bar, and the second cylinder can implement elastic buffering for the first probe or the second probe.

[0027] In some embodiments, the busbar clamping mechanism also includes an opening and closing drive mechanism, a first pusher claw and a second pusher claw, wherein: the opening and closing drive mechanism is installed on a mounting bracket, the first pusher claw and the second pusher claw are respectively connected to the driving end of the opening and closing drive mechanism via a third buffer connector and a fourth buffer connector so as to float up and down, and the opening and closing drive mechanism is used to drive the first pusher claw and the second pusher claw to close or open; the opening and closing drive mechanism is configured to drive the first pusher claw and the second pusher claw to separate to both sides to bend the two busbars in an upright state before clamping the two busbars; or, after clamping the two busbars, drive the first pusher claw and the second pusher claw to separate to both sides to straighten the two busbars that have been pre-bent; the first pusher claw is also used to cooperate with the first clamping assembly to clamp a busbar onto the corresponding conductive sheet, and the second pusher claw is also used to cooperate with the second clamping assembly to clamp another busbar onto the corresponding conductive sheet.

[0028] By providing an opening and closing driving mechanism, a first pusher claw and a second pusher claw, the two busbars in an upright state are bent before the busbars are pressed, thereby ensuring that the first pressing assembly and the second pressing assembly can smoothly press the bent busbars onto the corresponding conductive sheets, or realize the flattening of the two pressed busbars. In addition, since the first pusher claw and the second pusher claw can be connected to the driving end of the opening and closing driving mechanism in an upward and downward floating manner through the third buffer connector and the fourth buffer connector, respectively, when there is a height difference between the two conductive sheets on the junction box, the first pusher claw and the second pusher claw can be ensured to press the busbar onto the corresponding conductive sheet through the adaptive adjustment of the third buffer connector and the fourth buffer connector.

[0029] The present application also provides a junction box welding machine, which includes a conveying mechanism, a busbar clamping mechanism as described in any of the above items, and a laser welding mechanism, wherein: the conveying mechanism is configured to convey a battery string assembly to deliver the junction box on the battery string assembly to a welding station; the busbar clamping mechanism is configured to be movable above the welding station, to clamp two busbars on the battery string assembly onto two conductive plates in a one-to-one correspondence, and to energize a diode connected between the two conductive plates; the laser welding mechanism is configured to be movable above the welding station, to weld the two clamped busbars to the corresponding conductive plates by a laser beam.

[0030] Through the cooperation of the conveying mechanism, the busbar pressing mechanism and the laser welding mechanism, the junction box welding machine in the embodiment of the present application realizes automatic welding of the junction box and automatic detection of the diodes in the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the busbar pressing mechanism of the first embodiment of the present application at a first viewing angle;

[0032] Figure 2 It is a structural schematic diagram of the busbar pressing mechanism of the first embodiment of the present application at a second viewing angle;

[0033] Figure 3 It is a structural schematic diagram of the busbar pressing mechanism of the first embodiment of the present application at a third viewing angle;

[0034] Figure 4 A schematic structural diagram of a busbar pressing mechanism according to a second embodiment of the present application at one viewing angle;

[0035] Figure 5 It is a structural schematic diagram of the busbar pressing mechanism of the third embodiment of the present application at a first viewing angle;

[0036] Figure 6 It is a schematic structural diagram of the busbar pressing mechanism of the third embodiment of the present application at a second viewing angle;

[0037] Figure 7 It is a logic diagram of the power-on control circuit in the embodiment of the present application.

[0038] Figures 1 to 7 Included:

[0039] Mounting bracket 1;

[0040] First clamping assembly 2:

[0041] A first buffer connector 21, a first pressing claw 22, a first cylinder 211, and an adapter plate 212;

[0042] Second clamping assembly 3:

[0043] A second buffer connection member 31 and a second pressing claw 32;

[0044] First power-on component 4:

[0045] A first probe 41;

[0046] A first lifting unit 42, a third probe 43, a second cylinder 421, and a mounting plate 422;

[0047] Second power-on component 5:

[0048] A second probe 51;

[0049] A second lifting part 52 and a fourth probe 53;

[0050] Opening and closing driving mechanism 6;

[0051] First finger 7;

[0052] The second finger 8;

[0053] Intermediate relay 9:

[0054] The first output terminal 91, the second output terminal 92, the first input terminal 93, the second input terminal 94, the

[0055] a first set of contacts 95, a second set of contacts 96;

[0056] PLC controller 10;

[0057] Power supply 100;

[0058] Diode 200. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] The present application provides a busbar clamping mechanism, which is used to clamp two busbars on a battery string assembly onto two conductive sheets in a junction box in a one-to-one correspondence, and can energize a diode connected between the two conductive sheets to implement detection of the diode.

[0061] like Figures 1 to 3 As shown, the busbar clamping mechanism of the embodiment of the present application includes a lifting drive mechanism (not shown in the figure), a mounting bracket 1, and a first clamping assembly 2, a second clamping assembly 3, a first power-on assembly 4, and a second power-on assembly 5 arranged on the mounting bracket 1, wherein:

[0062] The mounting bracket 1 is connected to the movable part of the lifting drive mechanism.

[0063] One of the first power-on component 4 and the second power-on component 5 is electrically connected to the positive pole of the power source, and the other of the first power-on component 4 and the second power-on component 5 is electrically connected to the negative pole of the power source.

[0064] The lifting drive mechanism is configured to drive the mounting bracket 1 to descend, so as to drive the first clamping assembly 2, the second clamping assembly 3, the first power-on assembly 4 and the second power-on assembly 5 to descend synchronously.

[0065] The first pressing assembly 2 and the second pressing assembly 3 are configured to press a bus bar onto a corresponding conductive sheet respectively.

[0066] The first power-on component 4 and the second power-on component 5 are configured to be respectively crimped onto a corresponding conductive sheet or bus bar to energize the diode.

[0067] Since the first power-on assembly 4 and the second power-on assembly 5 capable of energizing the diode are provided, the busbar pressing mechanism of the embodiment of the present application can not only press the two busbars on the battery string assembly onto the two conductive sheets, but also energize the diode connected between the two conductive sheets to detect the diode. In other words, the busbar pressing mechanism of the embodiment of the present application has both the busbar pressing function and the diode detection function, thereby improving the welding efficiency of the junction box and reducing the equipment cost.

[0068] Optionally, the positive and negative electrodes of the power supply are configured to be able to implement exchange electrical connection with the first power-on component 4 and the second power-on component 5. Thus, when the first power-on component 4 is electrically connected to the positive electrode of the power supply, the second power-on component 5 is electrically connected to the negative electrode of the power supply, so that the first power-on component 4 and the second power-on component 5 can implement forward power supply to the diode. When the first power-on component 4 is electrically connected to the negative electrode of the power supply, the second power-on component 5 is electrically connected to the positive electrode of the power supply, so that the first power-on component 4 and the second power-on component 5 can implement reverse power supply to the diode.

[0069] To detect whether a diode is damaged, it is necessary to conduct two power-on tests on the diode. In the first power-on test, the first power-on component 4 and the second power-on component 5 are controlled to conduct forward power to the diode, and in the second power-on test, the first power-on component 4 and the second power-on component 5 are controlled to conduct reverse power to the diode. According to the conduction status of the diode in the two power-on tests, it can be determined whether the diode is broken down or connected in reverse, as follows:

[0070] Test result 1: In the first power-on test, the diode is turned on. In the second power-on test, the diode is not turned on, which means that the diode is not broken down and is not connected in reverse.

[0071] Test result 2: In the first power-on test, the diode is not conducting. In the second power-on test, the diode is conducting, which means that the diode is not broken down, but is connected in reverse.

[0072] Test result 3: In the first power-on test, the diode is turned on. In the second power-on test, the diode is also turned on, indicating that the diode is broken down.

[0073] Test result 4: The diode is not conducting during the first power-on test. The diode is also not conducting during the second power-on test, indicating that there is other type of damage to the junction box.

[0074] Of the four test results above, only the junction box that meets test result 1 can pass the test.

[0075] Optionally, when it is necessary to detect whether the junction box diode is broken down before welding, the first power-on component 4 and the second power-on component 5 can be used to perform two power-on tests on the diode to be tested to determine whether the diode is broken down and whether the diode is connected reversely.

[0076] Optionally, after the junction box welding is completed, the diode can be powered on twice again using the first power-on component 4 and the second power-on component 5 to determine whether the diode is broken down. Specifically, if the diode is turned on in the first power-on test and is not turned on in the second power-on test, it indicates that the diode is not broken down, otherwise it is broken down.

[0077] like Figure 7 As shown, optionally, the busbar clamping mechanism in the embodiment of the present application further includes an intermediate relay 9 and a PLC controller 10, the first power-on component 4 and the second power-on component 5 are electrically connected to the first output terminal 91 and the second output terminal 92 of the intermediate relay 9, respectively, the first input terminal 93 and the second input terminal 94 of the intermediate relay 9 are electrically connected to the positive electrode and the negative electrode of the power supply 100, respectively, and the intermediate relay 9 is also electrically connected to the PLC controller 10. The intermediate relay 9 includes a first group of contacts 95 and a second group of contacts 96.

[0078] When the PLC controller 10 controls the normally open end A in the first group of contacts 95 of the intermediate relay 9 and the normally open end A in the second group of contacts 96 to be electrically connected to the power supply 100, the first power-on component 4 is electrically connected to the positive pole of the power supply 100, and the second power-on component 5 is electrically connected to the negative pole of the power supply 100. At this time, the first power-on component 4 and the second power-on component 5 can implement forward power-on of the diode 200. When the PLC controller 10 controls the normally closed end B in the first group of contacts 95 and the normally closed end B in the second group of contacts 96 of the intermediate relay 9 to be electrically connected to the power supply 100, the first power-on component 4 is electrically connected to the negative pole of the power supply 100, and the second power-on component 5 is electrically connected to the positive pole of the power supply 100. At this time, the first power-on component 4 and the second power-on component 5 can implement reverse power-on of the diode 200.

[0079] Of course, it can also be set that when the PLC controller 10 controls the normally closed end B in the first group of contacts 95 of the intermediate relay 9 and the normally closed end B in the second group of contacts 96 to be electrically connected to the power supply 100, the first power-on component 4 is electrically connected to the positive pole of the power supply 100, and the second power-on component 5 is electrically connected to the negative pole of the power supply 100. When the PLC controller 10 controls the normally open end A of the first group of contacts 95 of the intermediate relay 9 and the normally open end A of the second group of contacts 96 to be electrically connected to the power supply 100, the first power-on component 4 is electrically connected to the negative pole of the power supply 100, and the second power-on component 5 is electrically connected to the positive pole of the power supply 100.

[0080] It can be seen that through the coordinated control of the intermediate relay 9 and the PLC controller 10, the embodiment of the present application realizes the exchange electrical connection between the positive and negative poles of the power supply 100 and the first power-on component 4 and the second power-on component 5, thereby improving the detection efficiency of the diode.

[0081] like Figures 1 to 3 As shown, optionally, the first clamping assembly 2 includes a first buffer connector 21 and a first pressing claw 22, wherein the first buffer connector 21 is mounted on the mounting bracket 1, and the first pressing claw 22 is mounted on the movable part of the first buffer connector 21. Similarly, the second clamping assembly 3 includes a second buffer connector 31 and a second pressing claw 32, wherein the second buffer connector 31 is mounted on the mounting bracket 1, and the second pressing claw 32 is mounted on the movable part of the second buffer connector 31. The first power-on assembly 4 is connected to the movable part of the first buffer connector 21, and the second power-on assembly 5 is connected to the movable part of the second buffer connector 31. The first power-on assembly 4 and the first pressing claw 22 are insulated from the second power-on assembly 5 and the second pressing claw 32. When the first pressing claw 22 and the second pressing claw 32 press the bus bar to the corresponding conductive sheet, the first power-on assembly 4 and the second power-on assembly 5 are crimped on the corresponding conductive sheet or bus bar.

[0082] Since the first pressing claw 22 and the first power-on component 4 are connected to the movable part of the first buffer connector 21, and the second pressing claw 32 and the second power-on component 5 are connected to the second buffer connector 31, when there is a height difference between the two conductive sheets on the junction box, adaptive adjustment of the first buffer connector 21 and the second buffer connector 31 can ensure that the first pressing claw 22 and the second pressing claw 32 can press the bus bar onto the corresponding conductive sheet, and the first power-on component 4 and the second power-on component 5 can be crimped onto the corresponding conductive sheet or bus bar.

[0083] In addition, since the first side (such as Figure 1 The first power-on component 4 and the first pressing claw 22 on the right side (as Figure 1 The second power-on component 5 (on the left side in the figure) and the second pressure claw 32 are insulated from each other, thereby preventing the conductive sheets on both sides from being short-circuited when the first power-on component 4 and the second power-on component 5 energize the corresponding conductive sheets, thereby ensuring that the first power-on component 4 and the second power-on component 5 can implement forward or reverse power-on to the diode.

[0084] like Figures 1 to 3As shown, optionally, the first buffer connector 21 and the second buffer connector 31 have the same structure. Taking the first buffer connector 21 as an example, it includes a first cylinder 211 and an adapter plate 212, the first cylinder 211 is installed on the mounting bracket 1, the adapter plate 212 is connected to the lower end of the telescopic rod of the first cylinder 211, and the first pressing claw 22 and the first power-on component 4 are arranged on the adapter plate 212. When the first pressing claw 22 presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the first cylinder 211 can realize adaptive retraction after being pressed, so that the first pressing claw 22 and the first power-on component 4 can float up and down. Finally, it is ensured that the first pressing claw 22 and the second pressing claw 32 can press the bus bar onto the corresponding conductive sheet, and the first power-on component 4 and the second power-on component 5 can be crimped onto the corresponding conductive sheet or bus bar.

[0085] Of course, the first buffer connector 21 can also adopt buffer connectors of other structures. For example, the first buffer connector 21 includes a guide rod, a spring and an adapter plate, wherein the guide rod is connected to the mounting bracket 1 in the vertical direction, the adapter plate is installed on the guide rod, and the spring is sleeved on the guide rod. The guide rod guides the up and down floating of the adapter plate, the first pressure claw 22 and the first power-on component 4 are arranged on the adapter plate, and the spring applies downward pressure to the adapter plate. When the first pressure claw 22 presses the bus bar onto the corresponding conductive sheet, the spring contracts under pressure.

[0086] Optionally, one end of the guide rod is fixedly connected to one of the mounting bracket 1 and the adapter plate, and the other end of the guide rod is slidably connected to the other of the mounting bracket 1 and the adapter plate, the upper end of the spring abuts against the mounting bracket 1, and the lower end of the spring abuts against the adapter plate.

[0087] like Figures 1 to 3 As shown, optionally, the first power-on component 4 includes a first probe 41, the upper end of which is connected to the movable part (e.g., adapter plate 212) of the first buffer connector 2, and the first probe 41 is electrically connected to one of the positive and negative electrodes of the power supply. The second power-on component 5 includes a second probe 51, the upper end of which is connected to the movable part (e.g., adapter plate 212) of the second buffer connector 31, and the second probe 51 is electrically connected to the other of the positive and negative electrodes of the power supply.

[0088] When the first pressing jaws 22 and the second pressing jaws 32 press the busbar onto the corresponding conductive sheet, the first probes 41 and the second probes 51 are pressed onto the corresponding conductive sheet or the busbar.

[0089] Using a probe as a power-on component can, on the one hand, ensure effective electrical contact with the conductive sheet, ultimately ensuring the power-on effect of the diode; on the other hand, the probe is a slender needle-like structure, which has little obstruction to the bus bar and the conductive sheet, and will not hinder the welding of the welding mechanism.

[0090] like Figure 4 As shown, in another optional embodiment, the first power-on component 4 includes a first lifting portion 42 and a third probe 43, wherein the first lifting portion 42 is mounted on the mounting bracket 1, and the third probe 43 is connected to the driving end of the first lifting portion 42 and is electrically connected to one of the positive and negative poles of the power supply. The first lifting portion 42 is used to drive the third probe 43 to rise and fall, so as to drive the third probe 43 to press or detach from the corresponding conductive sheet or bus bar. The second power-on component 5 includes a second lifting portion 52 and a fourth probe 53, wherein the second lifting portion 52 is mounted on the mounting bracket 1, and the fourth probe 53 is connected to the driving end of the second lifting portion 52 and is electrically connected to the other of the positive and negative poles of the power supply. The second lifting portion 52 is used to drive the fourth probe 53 to rise and fall, so as to drive the fourth probe 53 to press or detach from the corresponding conductive sheet or bus bar. In addition, the third probe 43 and the fourth probe 53 are insulated from each other.

[0091] Since the third probe 43 is independently driven to rise and fall by the first lifting part 42, and the fourth probe 53 is independently driven to rise and fall by the second lifting part 52, the first power-on component 4 does not need to be pressed down to the corresponding conductive sheet synchronously with the first clamping component 2, and the second power-on component 5 does not need to be pressed down to the corresponding conductive sheet synchronously with the second clamping component 3. The third probe 43 and the fourth probe 53 can be lowered separately before the first clamping component 2 and the second clamping component 3 clamp the bus bar to energize the diode, thereby improving the flexibility of the first power-on component 4 and the second power-on component 5.

[0092] For example, before the first pressing assembly 2 and the second pressing assembly 3 press the bus bar to the corresponding conductive sheet, the first lifting part 42 and the second lifting part 52 can first control the third probe 43 and the fourth probe 53 to press down to the corresponding conductive sheet or bus bar to implement the pre-welding inspection of the diode. If the diode fails the inspection, there is no need to control the first pressing assembly 2 and the second pressing assembly 3 to press the bus bar.

[0093] If the diode passes the test before welding, the first lifting part 42 and the second lifting part 52 can first drive the third probe 43 and the fourth probe 53 to rise to a high position away from the bus bar and withdraw the junction box, and then the first clamping assembly 2 and the second clamping assembly 3 clamp the bus bar again. In this way, as long as the third probe 43 and the fourth probe 53 can be insulated from each other, a short circuit of the diode can be avoided when power is turned on.

[0094] After the junction box welding is completed and the first clamping assembly 2 and the second clamping assembly 3 are separated from the corresponding conductive sheet, the first lifting part 42 and the second lifting part 52 can control the third probe 43 and the fourth probe 53 to be pressed down to the corresponding conductive sheet or bus bar again to implement post-weld detection of the diode.

[0095] Optionally, the first lifting part 42 and the second lifting part 52 have the same structure. Taking the first lifting part 42 as an example, it includes a second cylinder 421 and a mounting plate 422, wherein the second cylinder 421 is mounted on the mounting bracket 1, the mounting plate 422 is connected to the driving end of the second cylinder 421, and the third probe 43 is mounted on the mounting plate 422. The second cylinder 421 can not only implement the lifting drive of the third probe 43, but also enable the third probe 43 to be elastically crimped to the corresponding conductive sheet or bus bar.

[0096] like Figures 1 to 3 As shown, optionally, the first pressure claw 22 and the second pressure claw 32 of the embodiment of the present application have the same structure, including a pressure claw body and two pressure feet connected to the pressure claw body, and a space for the welding mechanism to pass through is formed between the two pressure feet. After the lifting drive mechanism drives the mounting bracket 1 to descend, the two pressure feet of the first pressure claw 22 press one bus bar onto the corresponding conductive sheet, and the two pressure feet of the second pressure claw 32 press the other bus bar onto the corresponding conductive sheet.

[0097] like Figures 4 to 6 As shown, optionally, the first pressing claw 22 and the second pressing claw 32 in the embodiment of the present application have the same structure and only have one pressing foot. In order to achieve effective pressing of the busbar, the busbar pressing mechanism in the embodiment of the present application also includes an opening and closing driving mechanism 6, a first pusher claw 7 and a second pusher claw 8, wherein: the opening and closing driving mechanism 6 is installed on the mounting bracket 1, and the first pusher claw 7 and the second pusher claw 8 are respectively connected to the driving end of the opening and closing driving mechanism 6 through the third buffer connection member and the fourth buffer connection member so as to float up and down, and the opening and closing driving mechanism 6 is used to drive the first pusher claw 7 and the second pusher claw 8 to close or open; the first pusher claw 7 is also used to cooperate with the first pressing claw 22 of the first pressing assembly to press a busbar onto the corresponding conductive sheet, and a space for the welding mechanism to pass through is formed between the first pusher claw 7 and the first pressing claw 22, and the second pusher claw 8 is also used to cooperate with the second pressing claw 32 of the second pressing assembly to press another busbar onto the corresponding conductive sheet, and a space for the welding mechanism to pass through is formed between the second pusher claw 8 and the second pressing claw 32.

[0098] For the case where two busbars to be compressed on the battery string assembly are in an upright state, the optional working process of the busbar compression mechanism in the embodiment of the present application is as follows:

[0099] The opening and closing driving mechanism 6 drives the first claw 7 and the second claw 8 to close. The "closing" mentioned here means that the first claw 7 and the second claw 8 are completely closed to facilitate the subsequent insertion into the gap between the two bus bars. Before controlling the first claw 7 and the second claw 8 to close, the first clamping assembly 2 and the second clamping assembly 3 can be controlled to rise to the avoidance high position to leave space for the closing of the first claw 7 and the second claw 8.

[0100] The lifting drive mechanism drives the first pusher claw 7, the second pusher claw 8, the first clamping assembly 2, the second clamping assembly 3, the first power-on assembly 4 and the second power-on assembly 5 to descend, so that the first pusher claw 7 and the second pusher claw 8 in the closed state extend between the two bus bars on the battery string assembly.

[0101] The opening and closing driving mechanism 6 then drives the first finger 7 and the second finger 8 to open to both sides to bend the two bus bars.

[0102] Control the first pressing assembly 2 and the second pressing assembly 3 to descend to between the first pusher claw 7 and the second pusher claw 8, that is, to reach Figure 4 or Figure 5 Status shown.

[0103] The lifting drive mechanism continues to drive the first pusher claw 7, the second pusher claw 8, the first clamping assembly 2, and the second clamping assembly 3 to descend. The first pusher claw 7 cooperates with the first clamping assembly 2 to press a bus bar onto the corresponding conductive sheet, and the second pusher claw 8 cooperates with the second clamping assembly 3 to press another bus bar onto the corresponding conductive sheet. The first power-on assembly 4 and the second power-on assembly 5 are pressed down onto the corresponding conductive sheet or bus bar.

[0104] It can be seen that by setting the opening and closing driving mechanism 6, the first pusher claw 7 and the second pusher claw 8, the busbar clamping mechanism in the embodiment of the present application realizes the bending of the two busbars in an upright state before clamping, thereby ensuring that the first clamping assembly 2 and the second clamping assembly 3 can smoothly clamp the bent busbars to the corresponding conductive sheet. In addition, the first pusher claw 7 cooperates with the first clamping assembly 2 to clamp one busbar to the corresponding conductive sheet, and the second pusher claw 8 cooperates with the second clamping assembly 3 to clamp another busbar to the corresponding conductive sheet, thereby ensuring the clamping effect of the busbar.

[0105] In the case where the two busbars to be compressed on the battery string assembly have been pre-bent, the optional working process of the busbar compression mechanism in the embodiment of the present application is as follows:

[0106] The opening and closing driving mechanism 6 drives the first finger 7 and the second finger 8 to close. The "closed" mentioned here does not mean that the first finger 7 and the second finger 8 are completely closed, but means that the distance between the first finger 7 and the second finger 8 when closed is smaller than the distance between the first finger 7 and the second finger 8 when open, and when the first finger 7 and the second finger 8 are closed, the first pressing claw 22 of the first pressing assembly 2 and the second pressing claw 32 of the second pressing assembly 3 are located between the first finger 7 and the second finger 8.

[0107] The lifting drive mechanism drives the first pusher claw 7, the second pusher claw 8, the first clamping assembly 2, and the second clamping assembly 3 to descend, so that the first pusher claw 7 cooperates with the first clamping assembly 2 to clamp a bus bar onto the corresponding conductive sheet, and the second pusher claw 8 cooperates with the second clamping assembly 3 to clamp another bus bar onto the corresponding conductive sheet. The first power-on assembly 4 and the second power-on assembly 5 are respectively pressed down onto the corresponding conductive sheet or bus bar.

[0108] Finally, the opening and closing driving mechanism 6 drives the first pusher claw 7 and the second pusher claw 8 to open to both sides to smooth the two compressed bus bars.

[0109] It can be seen that, by providing the opening and closing driving mechanism 6, the first pusher claw 7 and the second pusher claw 8, the busbar pressing mechanism in the embodiment of the present application realizes the pressing and flattening of the two pre-bent busbars. In addition, the first pusher claw 7 cooperates with the first pressing assembly 2 to press one busbar onto the corresponding conductive sheet, and the second pusher claw 8 cooperates with the second pressing assembly 3 to press the other busbar onto the corresponding conductive sheet, thereby ensuring the pressing effect of the busbar.

[0110] Of course, if the flatness of the pre-bent busbar is high, there is no need to flatten the busbar. In other words, the first pusher claw 7, the second pusher claw 8, the first clamping assembly 2, and the second clamping assembly 3 can be directly controlled to maintain Figure 4 or Figure 5 state, and then the first pusher claw 7, the second pusher claw 8, the first clamping assembly 2, and the second clamping assembly 3 are driven downward by the lifting drive mechanism, so that the first pusher claw 7 cooperates with the first clamping assembly 2 to press one bus bar onto the corresponding conductive sheet, and the second pusher claw 8 cooperates with the second clamping assembly 3 to press another bus bar onto the corresponding conductive sheet.

[0111] like Figures 5 and 6 As shown, in the case where the first power-on component 4 is connected to the movable part of the first buffer connector 21 and the second power-on component 5 is connected to the movable part of the second buffer connector 31, it is required that the first claw 7, the first clamping component 2, the first power-on component 4 on the first side and the second claw 8, the second clamping component 3, the second power-on component 5 on the second side are insulated from each other. In this way, it is possible to prevent the conductive sheets on both sides from being short-circuited when the first power-on component 4 and the second power-on component 5 energize the conductive sheet, and ultimately ensure that the first power-on component 4 and the second power-on component 5 smoothly energize the diode in the forward or reverse direction.

[0112] The embodiment of the present application also provides a junction box welding machine, which includes a conveying mechanism, a busbar clamping mechanism provided in any of the above embodiments, and a laser welding mechanism, wherein: the conveying mechanism is configured to convey the battery string assembly to deliver the junction box on the battery string assembly to the welding station. The busbar clamping mechanism is configured to be movable above the welding station, to clamp the two busbars on the battery string assembly onto the two conductive sheets in the junction box in a one-to-one correspondence, and to energize the diode connected between the two conductive sheets. The laser welding mechanism is configured to be movable above the welding station, and to weld the two clamped busbars to the corresponding conductive sheets by a laser beam.

[0113] Through the cooperation of the conveying mechanism, the busbar pressing mechanism and the laser welding mechanism, the junction box welding machine in the embodiment of the present application realizes automatic welding of the junction box and automatic detection of the diodes in the junction box.

[0114] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the above description in the embodiments. Moreover, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A busbar pressing mechanism, characterized in that: The busbar clamping mechanism is used to clamp two busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence, and a diode is connected between the two conductive sheets. The busbar clamping mechanism includes a lifting drive mechanism, a mounting bracket, and a first clamping assembly, a second clamping assembly, a first power-on assembly, and a second power-on assembly arranged on the mounting bracket, wherein: The mounting bracket is connected to the movable component of the lifting drive mechanism; One of the first power-on component and the second power-on component is electrically connected to the positive pole of the power source, and the other of the first power-on component and the second power-on component is electrically connected to the negative pole of the power source; The lifting drive mechanism is configured to drive the mounting bracket to descend, so as to drive the first clamping assembly, the second clamping assembly, the first power-on assembly and the second power-on assembly to descend synchronously; The first pressing assembly and the second pressing assembly are configured to respectively press a bus bar onto the corresponding conductive sheet; The first power-on component and the second power-on component are configured to be respectively pressed onto a corresponding one of the conductive sheets or bus bars to energize the diode.

2. The busbar pressing mechanism according to claim 1, characterized in that: The positive electrode and the negative electrode of the power source are configured to be able to implement an exchange electrical connection with the first power-on component and the second power-on component; When the first power-on component is electrically connected to the positive electrode of the power source, the second power-on component is electrically connected to the negative electrode of the power source, and the first power-on component and the second power-on component forwardly energize the diode; When the first power-on component is electrically connected to the negative electrode of the power source, and the second power-on component is electrically connected to the positive electrode of the power source, the first power-on component and the second power-on component reversely energize the diode.

3. The busbar pressing mechanism according to claim 2, characterized in that: The busbar pressing mechanism further includes an intermediate relay and a PLC controller, the first power-on component and the second power-on component are electrically connected to two output ends of the intermediate relay respectively, the two input ends of the intermediate relay are electrically connected to the positive electrode and the negative electrode of the power supply respectively, and the intermediate relay is also electrically connected to the PLC controller; The intermediate relay comprises a first group of contacts and a second group of contacts. When the PLC controller controls the normally open end of the first group of contacts and the normally open end of the second group of contacts to be electrically connected to the power supply, the first power-on component is electrically connected to the positive pole of the power supply, and the second power-on component is electrically connected to the negative pole of the power supply; when the PLC controller controls the normally closed end of the first group of contacts and the normally closed end of the second group of contacts of the intermediate relay to be electrically connected to the power supply, the first power-on component is electrically connected to the negative pole of the power supply, and the second power-on component is electrically connected to the positive pole of the power supply; or, The intermediate relay includes a first group of contacts and a second group of contacts. When the PLC controller controls the normally closed ends of the first group of contacts and the normally closed ends of the second group of contacts to be electrically connected to the power supply, the first power-on component is electrically connected to the positive pole of the power supply, and the second power-on component is electrically connected to the negative pole of the power supply; when the PLC controller controls the normally open ends of the first group of contacts and the normally open ends of the second group of contacts of the intermediate relay to be electrically connected to the power supply, the first power-on component is electrically connected to the negative pole of the power supply, and the second power-on component is electrically connected to the positive pole of the power supply.

4. The busbar pressing mechanism according to claim 1, characterized in that: The first clamping assembly includes a first buffer connection member and a first pressing claw, wherein the first buffer connection member is mounted on the mounting bracket, and the first pressing claw is mounted on a movable component of the first buffer connection member; The second clamping assembly comprises a second buffer connection member and a second pressing claw, wherein the second buffer connection member is mounted on the mounting bracket, and the second pressing claw is mounted on a movable component of the second buffer connection member; The first power-on component is connected to the movable part of the first buffer connector, the second power-on component is connected to the movable part of the second buffer connector, and the first power-on component and the first pressing claw are insulated from the second power-on component and the second pressing claw; When the first pressing claw and the second pressing claw press the bus bar onto the corresponding conductive sheet, the first power-on component and the second power-on component are pressed onto the corresponding conductive sheet or the bus bar.

5. The busbar pressing mechanism according to claim 4, characterized in that: The first buffer connector and the second buffer connector have the same structure; The first buffer connection member includes a first cylinder and an adapter plate, the first cylinder is mounted on the mounting bracket, the adapter plate is connected to the lower end of the telescopic rod of the first cylinder, and the first pressing claw and the first power-on assembly are arranged on the adapter plate; or, The first buffer connection member includes a guide rod, a spring and an adapter plate, wherein the guide rod is connected to the mounting bracket in a vertical direction, the adapter plate is mounted on the guide rod, the spring is sleeved on the guide rod, the guide rod guides the up and down floating of the adapter plate, the first pressure claw and the first power-on component are arranged on the adapter plate, and the spring applies downward pressure to the first pressure claw and the first power-on component; When the first pressing claw presses the bus bar onto the corresponding conductive sheet, the spring contracts under pressure.

6. The busbar pressing mechanism according to claim 4, characterized in that: The first power-on component includes a first probe, an upper end of the first probe is connected to a movable part of the first buffer connector, and the first probe is electrically connected to one of a positive electrode and a negative electrode of the power source; The second power-on component includes a second probe, an upper end of the second probe is connected to a movable part of the second buffer connector, and the second probe is electrically connected to the other of the positive electrode and the negative electrode of the power source; When the first pressing jaw and the second pressing jaw press the bus bar onto the corresponding conductive sheet, the first probe and the second probe are pressed onto the corresponding conductive sheet or the bus bar.

7. The busbar pressing mechanism according to claim 1, characterized in that: The first power-on assembly includes a first lifting part and a third probe, wherein the first lifting part is mounted on the mounting bracket, and the third probe is connected to the driving end of the first lifting part and is electrically connected to one of the positive electrode and the negative electrode of the power supply; The first lifting part is used to drive the third probe to rise and fall, so as to drive the third probe to press or detach from the corresponding conductive sheet or bus bar; The second power-on assembly includes a second lifting part and a fourth probe, wherein the second lifting part is mounted on the mounting bracket, and the fourth probe is connected to the driving end of the second lifting part and is electrically connected to the other of the positive electrode and the negative electrode of the power supply; The second lifting part is used to drive the fourth probe to rise and fall, so as to drive the fourth probe to press or detach from the corresponding conductive sheet or bus bar; At least the third probe and the fourth probe are insulated from each other.

8. The busbar pressing mechanism according to claim 7, characterized in that: The first lifting part and the second lifting part have the same structure. The first lifting part includes a second cylinder and a mounting plate, wherein the second cylinder is mounted on the mounting bracket, the mounting plate is connected to the driving end of the second cylinder, and the third probe is mounted on the mounting plate.

9. The busbar pressing mechanism according to any one of claims 1 to 8, characterized in that: The busbar pressing mechanism further includes an opening and closing driving mechanism, a first pusher claw and a second pusher claw, wherein: The opening and closing driving mechanism is mounted on the mounting bracket, the first pusher claw and the second pusher claw are respectively connected to the driving end of the opening and closing driving mechanism via a third buffer connection member and a fourth buffer connection member so as to be able to float up and down, and the opening and closing driving mechanism is used to drive the first pusher claw and the second pusher claw to close or open; The opening and closing driving mechanism is configured to drive the first claw and the second claw to separate to both sides to bend the two bus bars in an upright state before pressing the two bus bars; or, after pressing the two bus bars, drive the first claw and the second claw to separate to both sides to straighten the two bus bars that have been bent in advance; The first pusher claw is further used to cooperate with the first pressing assembly to press a bus bar onto a corresponding conductive sheet, and the second pusher claw is further used to cooperate with the second pressing assembly to press another bus bar onto a corresponding conductive sheet.

10. A junction box welding machine, characterized in that: The junction box welding machine comprises a conveying mechanism, a busbar pressing mechanism as claimed in any one of claims 1 to 9, and a laser welding mechanism, wherein: The conveying mechanism is configured to convey the battery string assembly to deliver the junction box on the battery string assembly to the welding station; The busbar pressing mechanism is configured to be movable above the welding station, pressing two busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence, and energizing the diode connected between the two conductive sheets; The laser welding mechanism is configured to be movable above the welding station, and to weld the two compressed bus bars to the corresponding conductive sheets by means of a laser beam.

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