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 bracket, a first pressing mechanism, a second pressing mechanism, a first conductive wire and a second conductive wire. And the first pressing mechanism and the second pressing mechanism are arranged on the mounting bracket and are insulated from each other. The first ends of the first conductor wire and the second conductor wire are electrically connected with the first pressing mechanism and the second pressing mechanism respectively, and the second ends of the first conductor wire and the second conductor wire are electrically connected with the positive electrode and the negative electrode of a power supply respectively. And when the lifting driving mechanism drives the mounting bracket to descend, the first pressing mechanism and the second pressing mechanism respectively press one bus bar to the corresponding conducting strip, and the first conducting wire and the second conducting wire electrify the diode through the first pressing mechanism and the second pressing mechanism. According to the application, the bus bar can be pressed on the conducting strips, and the diode connected between the two conducting strips can be electrified, so that the detection of the diode is implemented.

Description

Technical Field

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

[0002] After the battery string array and the glass plate are laminated and bonded together to form a battery string assembly, a junction box needs to be welded to the battery string assembly to manufacture the final photovoltaic module. The junction box welding includes the following processes: fixing the junction box on the battery string assembly and passing two bus bars on the battery string assembly into the junction box; then, pressing the two bus bars against the conductive sheets of the junction box; finally, welding 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, a pre-welding detection of the diode needs to be performed to determine whether the diode is broken down or reversed. If the diode is broken down or reversed, the junction box needs to be replaced. In addition, the high-temperature impact generated during the junction box welding process may damage the diode and cause the diode to be broken down. Therefore, after the junction box welding is completed, a post-welding detection of the diode also needs to be performed to determine whether the diode is broken down.

[0004] Currently, the pre-welding and post-welding detections of the diode are both implemented by a dedicated diode detection device. Therefore, the battery string assembly needs to be transported back and forth between the diode detection device and the junction box welding machine, thereby reducing the junction box welding efficiency and increasing the equipment cost. Utility Model Content

[0005] A bus bar pressing mechanism is used to press two bus bars on a battery string assembly against two conductive sheets in a junction box one by one. A diode is connected between the two conductive sheets. The bus bar pressing mechanism includes a lifting drive mechanism, a mounting bracket, a first pressing mechanism, a second pressing mechanism, a first conducting wire, and a second conducting wire, wherein:

[0006] The mounting bracket is connected to a moving part of the lifting drive mechanism;

[0007] The first pressing mechanism and the second pressing mechanism are arranged on the mounting bracket, and are insulated from each other between the first pressing mechanism and the second pressing mechanism;

[0008] The first end of the first conducting wire is electrically connected to the first pressing mechanism, the first end of the second conducting wire is electrically connected to the second pressing mechanism, one of the second ends of the first conducting wire and the second ends of the second conducting wire is electrically connected to the positive pole of the power supply, and the other of the second ends of the first conducting wire and the second ends of the second conducting wire is electrically connected to the negative pole of the power supply;

[0009] The lifting drive mechanism is configured to drive the mounting bracket to descend, so as to drive the first pressing mechanism and the second pressing mechanism to press a bus bar onto the corresponding conductive sheet respectively;

[0010] The first conductive wire and the second conductive wire conduct electricity to the diode through the first pressing mechanism and the second pressing mechanism.

[0011] The bus bar pressing mechanism provided by this application is provided with a first conductive wire and a second conductive wire. It can not only press the bus bar onto two conductive sheets, but also conduct electricity to the diode connected between the two conductive sheets, so as to detect the diode. This application improves the welding efficiency of the junction box and reduces the equipment cost.

[0012] In some embodiments, the positive electrode and the negative electrode of the power supply are configured to be able to exchange electrical connections with the first conductive wire and the second conductive wire; when the first conductive wire is electrically connected to the positive electrode of the power supply, the second conductive wire is electrically connected to the negative electrode of the power supply, and the first conductive wire and the second conductive wire conduct forward electricity to the diode; when the first conductive wire is electrically connected to the negative electrode of the power supply, the second conductive wire is electrically connected to the positive electrode of the power supply, and the first conductive wire and the second conductive wire conduct reverse electricity to the diode.

[0013] Since the positive electrode and the negative electrode of the power supply can exchange electrical connections with the first conductive wire and the second conductive wire. Therefore, before welding the junction box, the first conductive wire and the second conductive wire can cooperate to complete two power-on detections of the diode to determine whether the diode is broken down and whether the diode is connected reversely.

[0014] In some embodiments, the bus bar pressing mechanism further includes an intermediate relay and a PLC controller. The first conductive wire and the second conductive wire are respectively electrically connected to two output terminals of the intermediate relay. Two input terminals of the intermediate relay are respectively electrically connected to the positive electrode and the negative electrode of the power supply. The intermediate relay is also electrically connected to the PLC controller; the intermediate relay includes a first set of contacts and a second set of contacts. When the PLC controller controls the normally open terminals in the first set of contacts and the normally open terminals in the second set of contacts to be electrically connected to the power supply, the first conductive wire is electrically connected to the positive electrode of the power supply, and the second conductive wire is electrically connected to the negative electrode of the power supply; when the PLC controller controls the normally closed terminals in the first set of contacts and the normally closed terminals in the second set of contacts of the intermediate relay to be electrically connected to the power supply, the first conductive wire is electrically connected to the negative electrode of the power supply, and the second conductive wire is electrically connected to the positive electrode of the power supply; or, the intermediate relay includes a first set of contacts and a second set of contacts. When the PLC controller controls the normally closed terminals in the first set of contacts and the normally closed terminals in the second set of contacts to be electrically connected to the power supply, the first conductive wire is electrically connected to the positive electrode of the power supply, and the second conductive wire is electrically connected to the negative electrode of the power supply; when the PLC controller controls the normally open terminals in the first set of contacts and the normally open terminals in the second set of contacts of the intermediate relay to be electrically connected to the power supply, the first conductive wire is electrically connected to the negative electrode of the power supply, and the second conductive wire is electrically connected to the positive electrode of the power supply.

[0015] It can be seen that through the coordinated control of the intermediate relay and the PLC controller, the exchange electrical connection between the positive and negative poles of the power supply and the first and second conductive wires is realized, thereby improving the detection efficiency of the diode.

[0016] In some embodiments, the first pressing mechanism includes a first buffer connecting member and a first pressing claw. Among them, the first buffer connecting member is installed on the mounting bracket, and the first pressing claw is connected to the movable part of the first buffer connecting member; the second pressing mechanism includes a second buffer connecting member and a second pressing claw. Among them, the second buffer connecting member is installed on the mounting bracket, and the second pressing claw is connected to the movable part of the second buffer connecting member; the first end of the first conductive wire is electrically connected to the first pressing claw, the first end of the second conductive wire is electrically connected to the second pressing claw, and the first pressing claw and the second pressing claw are insulated from each other; when the lifting drive mechanism drives the mounting bracket to descend, the first pressing claw and the second pressing claw respectively elastically press a bus bar onto the corresponding conductive sheet, and the first pressing claw and the second pressing claw are also used to energize the diode.

[0017] Since the first pressing claw is on the movable part of the first buffer connecting member and the second pressing claw is connected to the movable part of the second buffer connecting member. Therefore, when there is a height difference between the two conductive sheets on the junction box, through the adaptive adjustment of the first buffer connecting member and the second buffer connecting member, it can be ensured that both the first pressing claw and the second pressing claw can press the bus bar onto the corresponding conductive sheet. Since the first end of the first conductive wire is electrically connected to the first pressing claw and the first end of the second conductive wire is electrically connected to 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 conductive wire and the second conductive wire can energize the diode between the two conductive sheets through the first pressing claw and the second pressing claw. In addition, since the first pressing claw and the second pressing claw are insulated from each other, it can prevent the first conductive wire from being short-circuited with the second conductive wire, thereby ensuring that the first conductive wire and the second conductive wire conduct forward or reverse electricity to the diode.

[0018] In some embodiments, the first buffer connecting member and the second buffer connecting member have the same structure. The first buffer connecting member includes a cylinder and a transfer plate. The cylinder is installed on the mounting bracket, the transfer plate is connected to the driving end of the cylinder, and the first pressing claw is arranged on the transfer plate; alternatively, the first buffer connecting member includes a guide rod, a spring and a transfer plate. Among them, the guide rod is vertically connected to the mounting bracket, the transfer plate is installed on the guide rod, the spring is sleeved on the guide rod, the guide rod guides the up and down floating of the transfer plate, the first pressing claw is arranged on the transfer plate, and the spring applies a downward pressure to the first pressing claw; when the first pressing claw presses the bus bar onto the corresponding conductive sheet, the spring is compressed and contracted.

[0019] By setting the first buffer connecting member and the second buffer connecting member, when the first clamping jaw and the second clamping jaw press the bus bar onto the corresponding conductive sheet, the first buffer connecting member and the second buffer connecting member can be telescopically extended and retracted up and down, so as to ensure that both the first clamping jaw and the second clamping jaw can press the bus bar onto the corresponding conductive sheet.

[0020] In some embodiments, the bus bar pressing mechanism further includes an opening and closing driving mechanism provided on the mounting bracket; the first pressing mechanism includes a first buffer connecting member, a third buffer connecting member, a first clamping jaw and a first shifting claw. Among them, the first buffer connecting member is mounted on the mounting bracket, the third buffer connecting member is connected to the driving end of the opening and closing driving mechanism, the first clamping jaw is connected to the movable part of the first buffer connecting member, and the first shifting claw is connected to the movable part of the third buffer connecting member; the second pressing mechanism includes a second buffer connecting member, a fourth buffer connecting member, a second clamping jaw and a second shifting claw. Among them, the second buffer connecting member is mounted on the mounting bracket, the fourth buffer connecting member is connected to the driving end of the opening and closing driving mechanism, the second clamping jaw is connected to the movable part of the second buffer connecting member, and the second shifting claw is connected to the movable part of the fourth buffer connecting member; the first end of the first wire is electrically connected to the first clamping jaw or the first shifting claw, and the first end of the second wire is electrically connected to the second clamping jaw or the second shifting claw; the first clamping jaw and the first shifting claw are insulated from the second clamping jaw and the second shifting claw; when the lifting driving mechanism drives the mounting bracket to descend, the first clamping jaw and the first shifting claw elastically press one bus bar onto the corresponding conductive sheet, and the second clamping jaw and the second shifting claw elastically press the other bus bar onto the corresponding other conductive sheet. The first clamping jaw or the first shifting claw, and the second clamping jaw or the second shifting claw are also used to cooperate to energize the diode; the opening and closing driving mechanism is configured to drive the first shifting claw and the second shifting claw to separate to both sides before pressing the two bus bars to bend the two bus bars in an upright state; or, after pressing the two pre-bent bus bars, drive the first shifting claw and the second shifting claw to separate to both sides to flatten the two bus bars.

[0021] Since the first pressing jaw and the second pressing jaw are respectively connected to the mounting bracket through the first buffer connecting member and the second buffer connecting member, and the first dialing jaw and the second dialing jaw are respectively connected to the driving end of the opening and closing driving mechanism through the third buffer connecting member and the fourth buffer connecting member, that is, the first pressing jaw, the second pressing jaw, the first dialing jaw, and the second dialing jaw can all independently achieve vertical floating. In this way, it can be ensured that even if there is a height difference between the two conductive sheets, the first pressing jaw and the first dialing jaw can press a bus bar onto the corresponding conductive sheet through their own floating, and the second pressing jaw and the second dialing jaw can press the other bus bar onto the corresponding conductive sheet through their own floating. The first dialing jaw and the second dialing jaw bend the two vertically standing bus bars before pressing the bus bars, so as to ensure that the two bus bars can finally be pressed onto the corresponding conductive sheets, or the first dialing jaw and the second dialing jaw flatten the two pressed bus bars. In addition, after pressing the bus bars, the first conductive wire connected to the first pressing jaw or the first dialing jaw and the second conductive wire connected to the second pressing jaw or the second dialing jaw are respectively electrically connected to one of the conductive sheets, so as to conduct forward or reverse current to the diode.

[0022] In some embodiments, the structures of the first buffer connecting member and the second buffer connecting member are the same. The first buffer connecting member includes a first air cylinder and a first adapter plate. The first adapter plate is connected to the driving end of the first air cylinder, and the first pressing jaw is arranged on the first adapter plate; alternatively, the first buffer connecting member includes a first guide rod, a first spring, and a first adapter plate. Among them, the first guide rod is connected to the mounting bracket in the vertical direction, the first adapter plate is mounted on the first guide rod, the first spring is sleeved on the first guide rod, the first guide rod guides the vertical floating of the first adapter plate, the first pressing jaw is arranged on the first adapter plate, and the first spring applies a downward pressure to the first pressing jaw; when the first pressing jaw presses the bus bar onto the corresponding conductive sheet, the first spring is compressed and contracted.

[0023] By setting the first buffer connecting member and the second buffer connecting member, when the first pressing jaw and the second pressing jaw press the bus bars onto the corresponding conductive sheets, the first buffer connecting member and the second buffer connecting member can achieve vertical expansion and contraction, so as to ensure that both the first pressing jaw and the second pressing jaw can press the bus bars onto the corresponding conductive sheets.

[0024] In some embodiments, the third buffer connecting member has the same structure as the fourth buffer connecting member. The third buffer connecting member includes a second air cylinder and a second adapter plate. The second air cylinder is connected to the driving end of the opening and closing driving mechanism, and the second adapter plate is connected to the driving end of the second air cylinder. The first pawl is arranged on the second adapter plate. Alternatively, the third buffer connecting member includes a second guide rod, a second spring, and a second adapter plate. The second guide rod is vertically connected to the driving end of the opening and closing driving mechanism, the second adapter plate is mounted on the second guide rod, the second spring is sleeved on the second guide rod, the second guide rod guides the up and down floating of the second adapter plate, the first pawl is arranged on the second adapter plate, and the second spring applies a downward pressure to the first pawl. When the first pawl presses the bus bar against the corresponding conductive sheet, the second spring is compressed and contracted.

[0025] By setting the third buffer connecting member and the fourth buffer connecting member, when the first pawl and the second pawl press the bus bar against the corresponding conductive sheet, the third buffer connecting member and the fourth buffer connecting member can be telescopically moved up and down, so as to ensure that both the first pawl and the second pawl can press the bus bar against the corresponding conductive sheet.

[0026] In some embodiments, the third buffer connecting member further includes an inductor arranged on the mounting bracket and matching with the second adapter plate, and the inductor is used to measure the upward stroke of the first pawl.

[0027] Through the cooperation of the inductor and the second adapter plate, the measurement of the upward stroke of the first pawl is realized. In this way, when the downward pressure of the first pawl on the corresponding bus bar reaches a predetermined value, the lifting and driving mechanism immediately stops driving the mounting bracket to descend, preventing the mounting bracket from descending excessively and causing the first pawl to damage the battery string assembly.

[0028] The present application also provides a junction box welding machine, including a conveying mechanism, a bus bar pressing mechanism as described in any one of the above, and a laser welding mechanism, wherein: the conveying mechanism is configured to convey the battery string assembly to send the junction box on the battery string assembly to the welding station; the bus bar pressing mechanism is configured to be movable above the welding station to press the two bus bars on the battery string assembly against the two conductive sheets in the junction box one by one, and to energize the diode connected between the two conductive sheets; the laser welding mechanism is configured to be movable above the welding station to weld the two pressed bus bars to the corresponding conductive sheets through a laser beam.

[0029] Through the cooperation of the conveying mechanism, the laser welding mechanism and the bus bar pressing mechanism, the junction box welding machine of the present application realizes the automatic welding of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic three-dimensional structure diagram of the bus bar pressing mechanism in an embodiment of the present application;

[0031] Figure 2 It is a front view structural schematic diagram of a bus bar pressing mechanism in an embodiment of the present application;

[0032] Figure 3 It is a side view structural schematic diagram of a bus bar pressing mechanism in an embodiment of the present application;

[0033] Figure 4 It is a bottom view structural schematic diagram of a bus bar pressing mechanism in an embodiment of the present application;

[0034] Figure 5 It is a three-dimensional structural schematic diagram of a bus bar pressing mechanism in another embodiment of the present application;

[0035] Figure 6 It is a front view structural schematic diagram of a bus bar pressing mechanism in another embodiment of the present application;

[0036] Figure 7 It is a side view structural schematic diagram of a bus bar pressing mechanism in another embodiment of the present application;

[0037] Figure 8 It is a bottom view structural schematic diagram of a bus bar pressing mechanism in another embodiment of the present application;

[0038] Figure 9 It is a logic schematic diagram of the energization control circuit in the embodiment of the present application.

[0039] Figures 1 to 9 It includes:

[0040] Mounting bracket 1;

[0041] First pressing mechanism 2: First buffer connecting member 21, first pressing claw 22, cylinder 211, adapter plate 212, first cylinder 213, first adapter plate 214, third buffer connecting member 23, first pawl 24, second cylinder 231, second adapter plate 232, inductor 233;

[0042] Second pressing mechanism 3: Second buffer connecting member 31, second pressing claw 32, second pawl 34;

[0043] First conducting wire 4;

[0044] Second conducting wire 5;

[0045] Opening and closing driving mechanism 6;

[0046] Intermediate relay 7: First output terminal 71, second output terminal 72, first input terminal 73, second input terminal 74, first set of contacts 75, second set of contacts 76;

[0047] PLC controller 8;

[0048] Power supply 100;

[0049] Diode 200. Specific implementation mode

[0050] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0051] The present application provides a bus bar pressing mechanism, which is used to press two bus bars on a battery string assembly onto two conductive sheets in a junction box one by one, and can energize a diode connected between the two conductive sheets to implement the detection of the diode.

[0052] As Figures 1 to 8 shown, the bus bar pressing mechanism provided by the present application includes a lifting drive mechanism (not shown in the figure), a mounting bracket 1, a first pressing mechanism 2, a second pressing mechanism 3, a first conducting wire 4 and a second conducting wire 5, wherein:

[0053] The mounting bracket 1 is connected to the moving part of the lifting drive mechanism.

[0054] The first pressing mechanism 2 and the second pressing mechanism 3 are arranged on the mounting bracket 1, and are insulated from each other between the first pressing mechanism 2 and the second pressing mechanism 3.

[0055] The first end of the first conducting wire 4 is electrically connected to the first pressing mechanism 2, the first end of the second conducting wire 5 is electrically connected to the second pressing mechanism 3, one of the second ends of the first conducting wire 4 and the second conducting wire 5 is electrically connected to the positive pole of the power supply, and the other of the second ends of the first conducting wire 4 and the second conducting wire 5 is electrically connected to the negative pole of the power supply.

[0056] The lifting drive mechanism is configured to drive the mounting bracket 1 to descend, so as to drive the first pressing mechanism 2 and the second pressing mechanism 3 to press a bus bar onto the corresponding conductive sheet respectively.

[0057] The first conducting wire 4 and the second conducting wire 5 energize the diode through the first pressing mechanism 2 and the second pressing mechanism 3.

[0058] Since there are the first conducting wire 4 and the first conducting wire 5 that can energize the diode, and the first conducting wire 4 and the second conducting wire 5 are electrically connected to the first pressing mechanism 2 and the second pressing mechanism 3 respectively, when the first pressing mechanism 2 and the second pressing mechanism 3 press the bus bar onto the corresponding conductive sheet, the first conducting wire 4 and the first conducting wire 5 can respectively form electrical connections with one of the conductive sheets through the first pressing mechanism 2 and the second pressing mechanism 3, so as to energize the diode connected between the two conductive sheets.

[0059] That is to say, the bus bar pressing mechanism of the embodiment of the present application has both the bus bar pressing function and the diode detection function, thereby improving the welding efficiency of the junction box and reducing the equipment cost.

[0060] Optionally, the positive and negative electrodes of the power supply are configured to be able to exchange electrical connections with the first wire 4 and the second wire 5. When the first wire 4 is electrically connected to the positive electrode of the power supply, the second wire 5 is electrically connected to the negative electrode of the power supply. In this way, the first wire 4 and the second wire 5 apply forward power to the diode. When the first wire 4 is electrically connected to the negative electrode of the power supply, the second wire 5 is electrically connected to the positive electrode of the power supply, and the first wire 4 and the second wire 5 apply reverse power to the diode.

[0061] To detect whether the diode is damaged, two power-on detections need to be performed on the diode. Among them, for the first power-on detection, control the first wire 4 and the second wire 5 to apply forward power to the diode. For the second power-on detection, control the first wire 4 and the second wire 5 to apply reverse power to the diode. According to the conduction conditions of the diode in the two power-on detections, it can be determined whether the diode is broken down and whether it is connected reversely, as follows:

[0062] Detection result 1: In the first power-on detection, the diode conducts. In the second power-on detection, the diode does not conduct, indicating that the diode is not broken down and is not connected reversely.

[0063] Detection result 2: In the first power-on detection, the diode does not conduct. In the second power-on detection, the diode conducts, indicating that although the diode is not broken down, it is connected reversely.

[0064] Detection result 3: In the first power-on detection, the diode conducts. In the second power-on detection, the diode also conducts, indicating that the diode is broken down.

[0065] Detection result 4: In the first power-on detection, the diode does not conduct. In the second power-on detection, the diode also does not conduct, indicating that there are other types of damages in the junction box.

[0066] For the above four detection results, only the junction box that obtains the detection result 1 can pass the detection.

[0067] Optionally, when it is necessary to detect whether the diode of the junction box before welding is broken down, the first wire 4 and the second wire 5 can be used to perform two power-on detections on the diode to be detected to determine whether the diode is broken down and whether the diode is connected reversely.

[0068] Optionally, after the junction box is welded, the diode can also be subjected to two power-on tests again using the first conductive wire 4 and the second conductive wire 5 to determine whether the diode is broken down. Specifically, if the diode conducts in the first power-on test and does not conduct in the second power-on test, it indicates that the diode is not broken down; otherwise, it is broken down.

[0069] As Figure 9 shown, optionally, the bus bar pressing mechanism in the embodiment of the present application further includes an intermediate relay 7 and a PLC controller 8. The first conductive wire 4 and the second conductive wire 5 are respectively electrically connected to the first output terminal 71 and the second output terminal 72 of the intermediate relay 7. The first input terminal 73 and the second input terminal 74 of the intermediate relay 7 are respectively electrically connected to the positive pole and the negative pole of the power supply 100. The intermediate relay 7 is also electrically connected to the PLC controller 8. The intermediate relay 7 includes a first set of contacts 75 and a second set of contacts 76.

[0070] When the PLC controller 8 controls the normally open end A in the first set of contacts 75 of the intermediate relay 7 and the normally open end A in the second set of contacts 76 to be electrically connected to the power supply 100, the first conductive wire 4 is electrically connected to the positive pole of the power supply 100, and the second conductive wire 5 is electrically connected to the negative pole of the power supply 100. At this time, the first conductive wire 4 and the second conductive wire 5 can perform forward power-on on the diode 200. When the PLC controller 8 controls the normally closed end B in the first set of contacts 75 of the intermediate relay 7 and the normally closed end B in the second set of contacts 76 to be electrically connected to the power supply 100, the first conductive wire 4 is electrically connected to the negative pole of the power supply 100, and the second conductive wire 5 is electrically connected to the positive pole of the power supply 100. At this time, the first conductive wire 4 and the second conductive wire 5 can perform reverse power-on on the diode 200.

[0071] Of course, it can also be set that when the PLC controller 8 controls the normally closed end B in the first set of contacts 75 of the intermediate relay 7 and the normally closed end B in the second set of contacts 76 to be electrically connected to the power supply 100, the first conductive wire 4 is electrically connected to the positive pole of the power supply 100, and the second conductive wire 5 is electrically connected to the negative pole of the power supply 100. When the PLC controller 8 controls the normally open end A in the first set of contacts 75 of the intermediate relay 7 and the normally open end A in the second set of contacts 76 to be electrically connected to the power supply 100, the first conductive wire 4 is electrically connected to the negative pole of the power supply 100, and the second conductive wire 5 is electrically connected to the positive pole of the power supply 100.

[0072] It can be seen that through the cooperative control of the intermediate relay 7 and the PLC controller 8, the embodiment of the present application realizes the exchange of electrical connection between the positive pole and the negative pole of the power supply 100 and the first conductive wire 4 and the second conductive wire 5, thereby improving the detection efficiency of the diode.

[0073] As Figures 1 to 4As shown, in an alternative embodiment, the first pressing mechanism 2 includes a first buffer connecting member 21 and a first pressing claw 22. Among them, the first buffer connecting member 21 is installed on the mounting bracket 1, and the first pressing claw 22 is connected to the movable part of the first buffer connecting member 21. The second pressing mechanism 3 includes a second buffer connecting member 31 and a second pressing claw 32. Among them, the second buffer connecting member 31 is installed on the mounting bracket 1, and the second pressing claw 32 is connected to the movable part of the second buffer connecting member 31. The first end of the first conducting wire 4 is electrically connected to the first pressing claw 22, the first end of the second conducting wire 5 is electrically connected to the second pressing claw 32, and the first pressing claw 22 and the second pressing claw 23 are insulated from each other.

[0074] When the lifting drive mechanism drives the mounting bracket 1 to descend, the first pressing claw 22 and the second pressing claw 32 respectively elastically press a bus bar onto the corresponding conductive sheet, and the first pressing claw 22 and the second pressing claw 32 are also used to energize the diode.

[0075] Since the first pressing claw 22 is on the movable part of the first buffer connecting member 21 and the second pressing claw 32 is connected to the movable part of the second buffer connecting member 31, when there is a height difference between the two conductive sheets on the junction box, through the adaptive adjustment of the first buffer connecting member 21 and the second buffer connecting member 31, it can be ensured that both the first pressing claw 22 and the second pressing claw 32 can press the bus bar onto the corresponding conductive sheet.

[0076] Since the first end of the first conducting wire 4 is electrically connected to the first pressing claw 22 and the first end of the second conducting wire 5 is electrically connected to the second pressing claw 32, when the first pressing claw 22 and the second pressing claw 32 press the bus bar onto the corresponding conductive sheets, the first conducting wire 4 and the second conducting wire 5 can energize the diode between the two conductive sheets through the first pressing claw 22 and the second pressing claw 32 to implement the detection of the diode. In addition, since the first pressing claw 22 and the second pressing claw 32 are insulated from each other, short circuit between the conductive sheets on both sides can be prevented, thus ensuring that the first conducting wire 4 and the second conducting wire 5 can conduct forward or reverse current to the diode.

[0077] Continue to refer to Figures 1 to 4 As shown, optionally, the first buffer connecting member 21 and the second buffer connecting member 31 have the same structure. Taking the first buffer connecting member 21 as an example, it includes a cylinder 211 and a transfer plate 212. The cylinder 211 is installed on the mounting bracket 1, the transfer plate 212 is connected to the driving end of the cylinder 211, and the first pressing claw 22 is arranged on the transfer plate 212.

[0078] When the first pressing claw 22 presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the cylinder 211 can be adaptively retracted under pressure, so that the first pressing claw 22 can move up and down, and finally ensure that both the first pressing claw 22 and the second pressing claw 32 can press the bus bar onto the corresponding conductive sheet.

[0079] Of course, the first buffer connecting member 21 can also adopt buffer connecting members with other structures. For example, the first buffer connecting member 21 includes a guide rod, a spring and a transfer plate. Among them, the guide rod is vertically connected to the mounting bracket 1, the transfer 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 transfer plate, the first pressing claw 22 is arranged on the transfer plate, and the spring applies a downward pressure to the first pressing claw 22. When the first pressing claw 22 presses the bus bar against the corresponding conductive sheet, the spring is compressed and contracted.

[0080] Optionally, one end of the guide rod is fixedly connected to one of the mounting bracket 1 and the transfer plate, the other end of the guide rod is slidably connected to the other of the mounting bracket 1 and the transfer plate, the upper end of the spring abuts against the mounting bracket 1, and the lower end of the spring abuts against the transfer plate.

[0081] As Figures 1 to 4 shown, in an alternative embodiment, the first pressing claw 22 and the second pressing claw 32 have the same structure, including a pressing claw body and two pressing feet connected to the pressing claw body. A space for the welding mechanism to pass through is formed between the two pressing feet. After the lifting drive mechanism drives the mounting bracket 1 to descend, the two pressing feet of the first pressing claw 22 press a bus bar against the corresponding conductive sheet, and the two pressing feet of the second pressing claw 32 press another bus bar against the corresponding conductive sheet.

[0082] As Figures 5 to 8 shown, in another alternative embodiment, the bus bar pressing mechanism of the present application further includes an opening and closing drive mechanism 6 arranged on the mounting bracket. The first pressing mechanism 2 includes a first buffer connecting member 21, a third buffer connecting member 23, a first pressing claw 22 and a first shifting claw 24. Among them, the first buffer connecting member 21 is mounted on the mounting bracket 1, the third buffer connecting member 23 is connected to the driving end of the opening and closing drive mechanism 6, the first pressing claw 22 is connected to the movable part of the first buffer connecting member 21, and the first shifting claw 24 is connected to the movable part of the third buffer connecting member 23. The second pressing mechanism 3 includes a second buffer connecting member 31, a fourth buffer connecting member, a second pressing claw 32 and a second shifting claw 34. Among them, the second buffer connecting member 31 is mounted on the mounting bracket 1, the fourth buffer connecting member is connected to the movable part of the opening and closing drive mechanism 6, the second pressing claw 32 is connected to the movable part of the second buffer connecting member 31, and the second shifting claw 34 is connected to the driving end of the fourth buffer connecting member.

[0083] The first end of the first conducting wire 4 is electrically connected to the first pressing claw 22 or the first shifting claw 24. The first end of the second conducting wire 5 is electrically connected to the second pressing claw 32 or the second shifting claw 34. The first pressing claw 22 and the first shifting claw 24 on the first side (such as the left side) are insulated from the second pressing claw 32 and the second shifting claw 34 on the second side (such as the right side).

[0084] When the lifting drive mechanism drives the mounting bracket 1 to descend, the first pressing claw 22 and the first dialing claw 24 elastically press one of the busbars onto a corresponding conductive sheet, and the second pressing claw 32 and the second dialing claw 34 elastically press the other busbar onto a corresponding other conductive sheet. The first pressing claw 22 or the first dialing claw 24, and the second pressing claw 32 or the second dialing claw 34 are also used to cooperate to energize the diode.

[0085] For the case where the two busbars to be pressed on the battery string assembly are in an upright state, the optional working process of the busbar pressing mechanism in the embodiment of the present application is as follows:

[0086] The opening and closing drive mechanism 6 drives the first dialing claw 24 and the second dialing claw 34 to close. Here, the "closing" means that the first dialing claw 24 and the second dialing claw 34 are completely closed so as to be inserted into the gap between the two busbars subsequently. Before controlling the first dialing claw 24 and the second dialing claw 34 to close, the first pressing claw 22 and the second pressing claw 32 can be controlled to rise to an avoidance high position first to leave space for the closing of the first dialing claw 24 and the second dialing claw 34. The opening and closing drive mechanism 6 can be, for example, a clamping jaw cylinder.

[0087] The lifting drive mechanism drives the first dialing claw 24, the second dialing claw 34, the first pressing claw 22, and the second pressing claw 32 to descend, so that the closed first dialing claw 24 and the second dialing claw 34 extend into the gap between the two busbars on the battery string assembly.

[0088] Subsequently, the opening and closing drive mechanism 6 drives the first dialing claw 24 and the second dialing claw 34 to open to both sides to bend the two busbars.

[0089] Control the first pressing claw 22 and the second pressing claw 32 to descend to between the first dialing claw 24 and the second dialing claw 34. Optionally, the height after the first pressing claw 22 and the second pressing claw 32 descend is flush with or slightly lower than the height of the first dialing claw 24 and the second dialing claw 34.

[0090] The lifting drive mechanism continues to drive the first dialing claw 24, the second dialing claw 34, the first pressing claw 22, and the second pressing claw 32 to descend, so that the first dialing claw 24 and the first pressing claw 22 cooperate to press one busbar onto a corresponding conductive sheet, a space for the welding mechanism to pass through is formed between the first dialing claw 24 and the first pressing claw 22, the second dialing claw 34 and the second pressing claw 32 cooperate to press the other busbar onto a corresponding conductive sheet, and a space for the welding mechanism to pass through is formed between the second dialing claw 34 and the second pressing claw 32.

[0091] It can be seen that by providing the opening and closing drive mechanism 6, the first pawl 24, the second pawl 34, the first presser pawl 22 and the second presser pawl 32, the bus bar pressing mechanism in the embodiment of the present application realizes the bending of two bus bars in a vertical state before pressing, and pressing the bent bus bars onto the corresponding conductive sheets. In addition, the first pawl 24 and the first presser pawl 22 cooperate to press one bus bar onto the corresponding conductive sheet, and the second pawl 34 and the second presser pawl 32 cooperate to press the other bus bar onto the corresponding conductive sheet, ensuring the pressing effect on the bus bars.

[0092] For the case where two bus bars to be pressed on the battery string assembly have been pre-bent, the optional working process of the bus bar pressing mechanism in the embodiment of the present application is as follows:

[0093] The opening and closing drive mechanism 6 drives the first pawl 24 and the second pawl 34 to close. The "closing" mentioned here does not mean that the first pawl 24 and the second pawl 34 are completely closed, but means that the distance between the first pawl 24 and the second pawl 34 when they are closed is less than the distance when they are open, and when the first pawl 24 and the second pawl 34 are closed, the first presser pawl 22 and the second presser pawl 32 are located between the first pawl 24 and the second pawl 34, that is, in the Figure 5 and Figure 6 shown state.

[0094] The lifting drive mechanism drives the first pawl 24, the second pawl 34, the first presser pawl 22, and the second presser pawl 32 to descend. The first pawl 24 and the first presser pawl 22 cooperate to press one bus bar onto the corresponding conductive sheet, and the second pawl 34 and the second presser pawl 32 cooperate to press the other bus bar onto the corresponding conductive sheet.

[0095] Finally, the opening and closing drive mechanism 6 drives the first pawl 24 and the second pawl 34 to open to both sides to smooth the two pressed bus bars, and a space for the welding mechanism to pass through is formed between the first pawl 24 and the first presser pawl 22, and a space for the welding mechanism to pass through is formed between the second pawl 34 and the second presser pawl 32.

[0096] It can be seen that by providing the opening and closing drive mechanism 6, the first pawl 24, the second pawl 34, the first presser pawl 22 and the second presser pawl 32, the bus bar pressing mechanism in the embodiment of the present application realizes the smoothing of the two pressed bus bars. In addition, the first pawl 24 and the first presser pawl 22 cooperate to press one bus bar onto the corresponding conductive sheet, and the second pawl 34 and the second presser pawl 32 cooperate to press the other bus bar onto the corresponding conductive sheet, ensuring the pressing effect on the bus bars.

[0097] Of course, if the flatness of the pre-bent bus bar is relatively high, the flattening of the bus bar may not be necessary. That is to say, the first pawl 24 and the second pawl 34 can be controlled to be in an open state first, and the first pressing claw 22 and the second pressing claw 32 are located between the first pawl 24 and the second pawl 34. Subsequently, the first pawl 24, the second pawl 34, the first pressing claw 22, and the second pressing claw 32 are driven to descend by the lifting drive mechanism, so that the first pawl 24 and the first pressing claw 22 cooperate to press a bus bar onto the corresponding conductive sheet, and the second pawl 34 and the second pressing claw 32 cooperate to press another bus bar onto the corresponding conductive sheet. The bus bar pressing mechanism of the present application can flexibly adjust the usage method according to actual needs.

[0098] Since the first end of the first conductive wire 4 is electrically connected to the first pressing claw 22 or the first pawl 24, and the first end of the second conductive wire 5 is electrically connected to the second pressing claw 32 or the second pawl 34, therefore, when the first pawl 24 and the first pressing claw 22 cooperate to press a bus bar onto the corresponding conductive sheet, and the second pawl 34 and the second pressing claw 32 cooperate to press another bus bar onto the corresponding conductive sheet, the first conductive wire 4 forms an electrical connection with one of the conductive sheets through the first pressing claw 22 or the first pawl 24, and the second conductive wire 5 forms an electrical connection with the other conductive sheet through the second pressing claw 32 or the second pawl 34, so that the first conductive wire 4 and the second conductive wire 5 can perform forward or reverse energization on the diode between the two conductive sheets.

[0099] Since the first pressing claw 22 and the first pawl 24 on the first side (such as the left side) are insulated from the second pressing claw 32 and the second pawl 34 on the second side (such as the right side), the short circuit of the conductive sheets on both sides during pressing is avoided, ensuring that the first conductive wire 4 and the second conductive wire 5 can perform forward or reverse energization on the diode between the two conductive sheets.

[0100] In addition, since the first pressing claw 22 and the second pressing claw 32 are respectively connected to the mounting bracket through the first buffer connecting member 21 and the second buffer connecting member 31, and the first pawl 24 and the second pawl 34 are respectively connected to the driving end of the opening and closing driving mechanism 6 through the third buffer connecting member 23 and the fourth buffer connecting member, that is, the first pressing claw 22, the second pressing claw 32, the first pawl 24, and the second pawl 34 can all independently move up and down. In this way, it can be ensured that even if there is a height difference between the two conductive sheets, the first pressing claw 22 and the first pawl 24 can press a bus bar onto the corresponding conductive sheet through their own floating, and the second pressing claw 32 and the second pawl 34 can press another bus bar onto the corresponding conductive sheet through their own floating.

[0101] Continue to refer to Figures 5 to 8As shown, optionally, the first buffer connecting member 21 and the second buffer connecting member 31 have the same structure. Taking the first buffer connecting member 21 as an example, it includes a first air cylinder 213 and a first adapter plate 214. The first adapter plate 214 is connected to the driving end of the first air cylinder 213, and the first pressing claw 22 is arranged on the first adapter plate 214.

[0102] When the first pressing claw 22 presses the bus bar against the corresponding conductive sheet, the telescopic rod of the first air cylinder 213 can be adaptively retracted under pressure, so that the first pressing claw 22 can float up and down. Finally, it is ensured that both the first pressing claw 22 and the second pressing claw 32 can press the bus bar against the corresponding conductive sheet.

[0103] By setting the first buffer connecting member 21 and the second buffer connecting member 31 to include the first air cylinder 213, not only can the buffering of the first pressing claw 22 and the second pressing claw 32 be implemented, but also the lifting drive control of the first pressing claw 22 and the second pressing claw 32 can be implemented through the first air cylinder 213.

[0104] Of course, in the case where the lifting control of the first pressing claw 22 and the second pressing claw 32 is not required, such as in the case where the two bus bars to be pressed have been pre-bent as described above, the first buffer connecting member 21 can also adopt a buffer connecting member with other structures. For example, the first buffer connecting member 21 includes a first guide rod, a first spring and a first adapter plate. Among them, the first guide rod is connected to the mounting bracket 1 in the vertical direction, the first adapter plate is mounted on the guide rod, the first spring is sleeved on the first guide rod, the first guide rod guides the up and down floating of the first adapter plate, and the first pressing claw 22 is arranged on the first adapter plate. The first spring applies a downward pressure to the first pressing claw 22. When the first pressing claw 22 presses the bus bar against the corresponding conductive sheet, the first spring is compressed and contracted.

[0105] Optionally, one end of the first guide rod is fixedly connected to one of the mounting bracket 1 and the first adapter plate, the other end of the first guide rod is slidably connected to the other of the mounting bracket 1 and the first adapter plate, the upper end of the first spring abuts against the mounting bracket 1, and the lower end of the first spring abuts against the first adapter plate.

[0106] Optionally, the third buffer connecting member 23 and the fourth buffer connecting member have the same structure. As Figure 7 shown, taking the third buffer connecting member 23 as an example, it includes a second air cylinder 231 and a second adapter plate 232. The second air cylinder 231 is connected to the driving end of the opening and closing driving mechanism 6, the second adapter plate 232 is connected to the driving end of the second air cylinder 231, and the first dialing claw 24 is arranged on the second adapter plate 232.

[0107] When the first pawl 24 presses the bus bar against the corresponding conductive sheet, the telescopic rod of the second cylinder 231 can be adaptively retracted under pressure, so that the first pawl 24 can float up and down. Finally, it is ensured that both the first pawl 24 and the second pawl 34 can press the bus bar against the corresponding conductive sheet.

[0108] Of course, the third buffer connecting member 23 can also adopt buffer connecting members of other structures. For example, the third buffer connecting member 23 includes a second guide rod, a second spring and a second adapter plate. Among them, the second guide rod is connected to the driving end of the opening and closing driving mechanism 6 in the vertical direction, the second adapter plate is installed on the second guide rod, the second spring is sleeved on the second guide rod, the second guide rod guides the up and down floating of the second adapter plate, the first pawl is arranged on the second adapter plate, and the second spring applies a downward pressure to the first pawl. When the first pawl 24 presses the bus bar against the corresponding conductive sheet, the second spring is compressed and contracted.

[0109] Optionally, one end of the second guide rod is fixedly connected to one of the driving end of the opening and closing driving mechanism 6 and the second adapter plate, the other end of the second guide rod is slidably connected to the other of the driving end of the opening and closing driving mechanism 6 and the second adapter plate, the upper end of the second spring abuts against the driving end of the opening and closing driving mechanism 6, and the lower end of the second spring abuts against the second adapter plate.

[0110] As Figure 7 shown, optionally, the third buffer connecting member 23 further includes an inductor 233 arranged on the mounting bracket 1 and matching with the second adapter plate 232. The inductor 233 is used to measure the rising stroke of the first pawl 24. Through the cooperation of the inductor 233 and the second adapter plate 232, the measurement of the rising stroke of the first pawl 24 is realized. When the rising strokes of the first pawl 24 and the second pawl 34 reach the set value, the lifting driving mechanism immediately stops driving the mounting bracket 1 to descend, ensuring that the first pawl 24 and the second pawl 34 can effectively over-press the bus bar.

[0111] The embodiment of the present application also provides a junction box welding machine, including a conveying mechanism, the bus bar pressing 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 send the junction box on the battery string assembly to the welding station; the bus bar pressing mechanism is configured to be movable above the welding station, press the two bus bars on the battery string assembly against the two conductive sheets in the junction box one by one, and energize the diode connected between the two conductive sheets; the laser welding mechanism is configured to be movable above the welding station and weld the two bus bars pressed against the corresponding conductive sheets by laser beams. Through the cooperation of the conveying mechanism, the laser welding mechanism and the bus bar pressing mechanism, the junction box welding machine in the embodiment of the present application realizes the automatic welding of the junction box.

[0112] The above description of the present application is detailed enough and has a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The protection scope claimed by the present application is defined by the claims described, rather than by the above description in the embodiments. Moreover, the embodiments mentioned in the present application do not have to be 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, a first clamping mechanism, a second clamping mechanism, a first conductive wire, and a second conductive wire, wherein: The mounting bracket is connected to the movable component of the lifting drive mechanism; The first pressing mechanism and the second pressing mechanism are arranged on the mounting bracket, and the first pressing mechanism and the second pressing mechanism are insulated from each other; The first end of the first conductive wire is electrically connected to the first pressing mechanism, the first end of the second conductive wire is electrically connected to the second pressing mechanism, one of the second end of the first conductive wire and the second end of the second conductive wire is electrically connected to the positive electrode of the power supply, and the other of the second end of the first conductive wire and the second end of the second conductive wire is electrically connected to the negative electrode of the power supply; The lifting drive mechanism is configured to drive the mounting bracket to descend, so as to drive the first pressing mechanism and the second pressing mechanism to press a bus bar onto the corresponding conductive sheet respectively; The first conductive wire and the second conductive wire energize the diode via the first pressing mechanism and the second pressing mechanism.

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 alternating electrical connection with the first conductive line and the second conductive line; When the first conductive wire is electrically connected to the positive electrode of the power source, the second conductive wire is electrically connected to the negative electrode of the power source, and the first conductive wire and the second conductive wire conduct forward current to the diode; When the first conductive wire is electrically connected to the negative electrode of the power source, the second conductive wire is electrically connected to the positive electrode of the power source, and the first conductive wire and the second conductive wire 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 conductive wire and the second conductive wire 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 conductive wire is electrically connected to the positive electrode of the power supply, and the second conductive wire is electrically connected to the negative electrode 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 conductive wire is electrically connected to the negative electrode of the power supply, and the second conductive wire is electrically connected to the positive electrode 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 conductive wire is electrically connected to the positive pole of the power supply, and the second conductive wire 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 conductive wire is electrically connected to the negative pole of the power supply, and the second conductive wire 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 mechanism comprises 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 connected to a movable component of the first buffer connection member; The second clamping mechanism 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 connected to a movable component of the second buffer connection member; The first end of the first conductive wire is electrically connected to the first pressing claw, the first end of the second conductive wire is electrically connected to the second pressing claw, and the first pressing claw is insulated from the second pressing claw; When the lifting drive mechanism drives the mounting bracket to descend, the first pressing claw and the second pressing claw respectively elastically press a bus bar onto the corresponding conductive sheet, and the first pressing claw and the second pressing claw are also used to energize the diode.

5. The busbar pressing mechanism according to claim 4, characterized in that: The first buffer connection member has the same structure as the second buffer connection member, the first buffer connection member comprises a cylinder and an adapter plate, the cylinder is mounted on the mounting bracket, the adapter plate is connected to the driving end of the cylinder, and the first pressing claw is 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 pressing claw is arranged on the adapter plate, and the spring applies downward pressure to the first pressing claw; 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 1, characterized in that: The busbar pressing mechanism further includes an opening and closing driving mechanism disposed on the mounting bracket; The first clamping mechanism comprises a first buffer connection member, a third buffer connection member, a first pressing claw and a first pushing claw, wherein the first buffer connection member is mounted on the mounting bracket, the third buffer connection member is connected to the driving end of the opening and closing driving mechanism, the first pressing claw is connected to the movable part of the first buffer connection member, and the first pushing claw is connected to the movable part of the third buffer connection member; The second clamping mechanism comprises a second buffer connection member, a fourth buffer connection member, a second pressing claw and a second pushing claw, wherein the second buffer connection member is mounted on the mounting bracket, the fourth buffer connection member is connected to the driving end of the opening and closing driving mechanism, the second pressing claw is connected to the movable part of the second buffer connection member, and the second pushing claw is connected to the movable part of the fourth buffer connection member; The first end of the first conductive wire is electrically connected to the first pressing claw or the first pushing claw, and the first end of the second conductive wire is electrically connected to the second pressing claw or the second pushing claw; The first pressing claw and the first pushing claw are insulated from the second pressing claw and the second pushing claw; When the lifting drive mechanism drives the mounting bracket to descend, the first pressing claw and the first pushing claw elastically press one of the bus bars onto a corresponding conductive sheet, and the second pressing claw and the second pushing claw elastically press another bus bar onto another corresponding conductive sheet, and the first pressing claw or the first pushing claw, and the second pressing claw or the second pushing claw are also used to cooperate in energizing the diode; The opening and closing driving mechanism is configured to drive the first and second claws 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 pre-bent bus bars, drive the first and second claws to separate to both sides to straighten the two bus bars.

7. The busbar pressing mechanism according to claim 6, characterized in that: The first buffer connection member has the same structure as the second buffer connection member, the first buffer connection member comprises a first cylinder and a first adapter plate, the first adapter plate is connected to the driving end of the first cylinder, and the first pressing claw is arranged on the first adapter plate; Alternatively, the first buffer connector includes a first guide rod, a first spring and a first adapter plate, wherein the first guide rod is connected to the mounting bracket in a vertical direction, the first adapter plate is mounted on the first guide rod, the first spring is sleeved on the first guide rod, the first guide rod guides the first adapter plate to float up and down, the first pressure claw is arranged on the first adapter plate, and the first spring applies downward pressure to the first pressure claw; When the first pressing claw presses the bus bar onto the corresponding conductive sheet, the first spring contracts under pressure.

8. The busbar pressing mechanism according to claim 6, characterized in that: The third buffer connector has the same structure as the fourth buffer connector, and includes a second cylinder and a second adapter plate, wherein the second cylinder is connected to the driving end of the opening and closing driving mechanism, the second adapter plate is connected to the driving end of the second cylinder, and the first pusher claw is arranged on the second adapter plate; Alternatively, the third buffer connection member includes a second guide rod, a second spring and a second adapter plate, wherein the second guide rod is vertically connected to the driving end of the opening and closing driving mechanism, the second adapter plate is mounted on the second guide rod, the second spring is sleeved on the second guide rod, the second guide rod guides the up and down floating of the second adapter plate, the first pusher claw is arranged on the second adapter plate, and the second spring applies downward pressure to the first pusher claw; When the first pusher claw presses the bus bar onto the corresponding conductive sheet, the second spring contracts under pressure.

9. The busbar pressing mechanism according to claim 8, characterized in that: The third buffer connection member further comprises a sensor arranged on the mounting bracket and matched with the second adapter plate, wherein the sensor is used to measure the rising stroke of the first pusher claw.

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.

Images