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, an installation support, an opening and closing driving mechanism, a first pusher dog assembly, a second pusher dog assembly, a first pressing claw assembly, a second pressing claw assembly, a first buffering assembly and a second buffering assembly. The installation support is connected to the lifting driving mechanism, the opening and closing driving mechanism is installed on the installation support, and the first pusher dog assembly and the second pusher dog assembly are connected to the opening and closing driving mechanism through the first buffering assembly. The first pressing claw assembly and the second pressing claw assembly are connected to the mounting support through the second buffering assembly. The first pusher dog assembly, the second pusher dog assembly, the first pressing claw assembly and the second pressing claw assembly can float up and down, and the first pusher dog assembly and the first pressing claw assembly can press a bus bar to a conducting strip through the floating of the first pusher dog assembly and the first pressing claw assembly. And the second poking claw assembly and the second pressing claw assembly can press the other bus bar to the other conducting strip through the second poking claw assembly and the second pressing claw assembly, so that the welding effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production, and specifically to a busbar 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, the junction box needs to be installed on the battery string assembly to make the final photovoltaic module. The junction box installation includes the following process: fix the junction box on the battery string assembly and allow the two bus bars on the battery 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. Before welding the bus bar to the junction box, the bus bar needs to be pressed onto the conductive sheet of the junction box.

[0003] For example, a busbar bending and clamping mechanism disclosed in the patent with publication number CN219233635U has two pushers installed on the same buffer mounting frame. Since the buffer mounting frame itself cannot tilt during the up and down floating process, the relative height between the two pushers installed thereon will not change, that is, the descending height of the two pushers is always consistent. When there is a height difference between the two conductive sheets of the junction box, one of the pushers can press one of the busbars to the corresponding higher conductive sheet, while the other pusher cannot effectively press the other busbar to the corresponding lower conductive sheet, which ultimately affects the welding effect of the other busbar. Utility Model Content

[0004] In order to solve the above technical problems, the first aspect of the present application provides a busbar pressing mechanism, which adopts the following technical solution:

[0005] A busbar pressing mechanism is used to press two upright busbars on a battery string assembly onto two conductive sheets in a junction box in a one-to-one correspondence. The busbar pressing mechanism includes a lifting drive mechanism, a mounting bracket, an opening and closing drive mechanism, a first pusher claw assembly, a second pusher claw assembly, a first pressure claw assembly, a second pressure claw assembly, two first buffer assemblies, and two second buffer assemblies, wherein:

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

[0007] The opening and closing driving mechanism is installed on the mounting bracket, and the first claw assembly and the second claw assembly are respectively connected to the driving end of the opening and closing driving mechanism through a first buffer assembly so as to float up and down. The opening and closing driving mechanism is used to drive the first claw assembly and the second claw assembly to close or open;

[0008] The first pressing claw assembly and the second pressing claw assembly are respectively connected to the mounting bracket via a second buffer assembly so as to float up and down;

[0009] The lifting drive mechanism is configured to drive the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend when the first claw assembly and the second claw assembly are closed, so that the first claw assembly and the second claw assembly extend between the two bus bars in the junction box, and the opening and closing drive mechanism is configured to drive the first claw assembly and the second claw assembly to open to both sides to bend the two bus bars;

[0010] The lifting drive mechanism is also configured to continue to drive the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, so that the first claw assembly and the first pressure claw assembly cooperate to press one of the bent bus bars onto the corresponding conductive sheet, and the second claw assembly and the second pressure claw assembly cooperate to press the other bent bus bar onto the corresponding conductive sheet.

[0011] The busbar pressing mechanism provided by the present application has a first pusher claw assembly and a second pusher claw assembly connected to the driving end of the opening and closing driving mechanism via a first buffer assembly so as to be able to float up and down, and a first pressure claw assembly and a second pressure claw assembly connected to the mounting bracket via a second buffer assembly so as to be able to float up and down, that is, the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly, and the second pressure claw assembly can independently float up and down, so that it can be ensured that even if there is a height difference between the two conductive sheets, the first pusher claw assembly and the first pressure claw assembly can press one busbar to a corresponding conductive sheet by their own floating, and the second pusher claw assembly and the second pressure claw assembly can also press the other busbar to the corresponding other conductive sheet by their own floating, and the floating of the pusher claw assemblies and the pressure claw assemblies on both sides will not restrict each other, thereby ensuring that the busbars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0012] In some embodiments, the second buffer assembly includes a first cylinder, which is mounted on a mounting bracket, and the first pressure claw assembly or the second pressure claw assembly is connected to the lower end of the telescopic rod of the first cylinder; before the lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the first cylinder drives the first pressure claw assembly and the second pressure claw assembly to rise to a high avoidance position to leave space for the closing of the first claw assembly and the second claw assembly; after the first claw assembly and the second claw assembly bend the two bus bars, the first cylinder drives the first pressure claw assembly or the second pressure claw assembly to descend to a clamping low position so that the first pressure claw assembly and the second pressure claw assembly enter between the first claw assembly and the second claw assembly; when the first claw assembly and the second claw assembly clamp the bus bar onto the corresponding conductive sheet, the telescopic rod of the corresponding first cylinder is compressed and retracted.

[0013] The second buffer assembly is set as the first cylinder. Before the lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the second buffer assembly first drives the first pressure claw assembly and the second pressure claw assembly to rise to the avoidance high position, thereby leaving space for the first claw assembly and the second claw assembly to close, ensuring that the opening and closing drive mechanism can drive the first claw assembly and the second claw assembly to close in the middle. After the first claw assembly and the second claw assembly bend the two bus bars, the second buffer assembly first drives the first pressure claw assembly or the second pressure claw assembly to descend to the clamping low position, so that the first pressure claw assembly and the second pressure claw assembly return to between the first claw assembly and the second claw assembly. In this way, when the lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to continue to descend, the first pressure claw assembly cooperates with the first claw assembly to clamp one bus bar onto the corresponding conductive sheet, and the second pressure claw assembly cooperates with the second claw assembly to clamp another bus bar onto the corresponding conductive sheet. In addition, since the telescopic rod of the first cylinder can adaptively retract after being compressed, the first pressing claw assembly and the second pressing claw assembly can independently float up and down, thereby ensuring that the first pressing claw assembly and the second pressing claw assembly can adaptively press the bus bars on both sides.

[0014] In some embodiments, the first cylinder is connected to a compressed air source through a first air supply system; the first air supply system includes an intake pipeline, an electromagnetic reversing valve, a first pressure reducing valve, a first pipeline and a second pipeline, wherein: one end of the intake pipeline is connected to the compressed air source, and the other end of the intake pipeline is connected to the electromagnetic reversing valve; one end of the first pipeline is connected to the electromagnetic reversing valve, and the other end of the first pipeline is connected to the rodless cavity of the first cylinder; one end of the second pipeline is connected to the electromagnetic reversing valve, and the other end of the second pipeline is connected to the rod cavity of the first cylinder; the electromagnetic reversing valve is used to control the intake pipeline to be connected to the first pipeline or the second pipeline; the first The pressure reducing valve is arranged on the first pipeline or the air intake pipeline; when the electromagnetic reversing valve controls the air intake pipeline to be connected with the first pipeline, the compressed air enters into the rodless chamber of the first cylinder through the air intake pipeline and the first pipeline in turn, and the first pressure reducing valve is used to adjust the pressure of the compressed air entering into the rodless chamber of the first cylinder, so that the telescopic rod of the first cylinder applies a predetermined downward pressure to the first pressure claw assembly or the second pressure claw assembly; when the electromagnetic reversing valve controls the air intake pipeline to be connected with the second pipeline, the compressed air enters into the rod chamber of the first cylinder through the air intake pipeline and the second pipeline in turn, so that the telescopic rod of the first cylinder drives the first pressure claw assembly or the second pressure claw assembly to rise.

[0015] Before the lifting drive mechanism drives the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the electromagnetic reversing valve controls the air intake pipeline to be connected with the second pipeline, so that the telescopic rod of the first cylinder drives the first pressure claw assembly and the second pressure claw assembly to rise to the avoidance high position, thereby leaving space for the closing of the first pusher claw assembly and the second pusher claw assembly. After the first pusher claw assembly and the second pusher claw assembly bend two bus bars, the electromagnetic reversing valve controls the air intake pipeline to be connected with the first pipeline, so that the telescopic rod of the first cylinder applies downward pressure to the first pressure claw assembly and the second pressure claw assembly, so that the first pressure claw assembly or the second pressure claw assembly descends to the clamping low position. When the first pressing claw assembly and the second pressing claw assembly are in the process of pressing the bus bar to the corresponding conductive sheet, the electromagnetic reversing valve controls the air intake pipeline to remain connected with the first pipeline, so that the telescopic rod of the first cylinder continuously applies a predetermined downward pressure to the first pressing claw assembly and the second pressing claw assembly. In this way, the first pressing claw assembly and the second pressing claw assembly can achieve independent up and down floating, thereby ensuring that the first pressing claw assembly and the second pressing claw assembly can achieve adaptive pressing of the bus bars on both sides.

[0016] In some embodiments, the first buffer assembly includes a second cylinder, which is installed on the driving end of the opening and closing drive mechanism, and the first claw assembly or the second claw assembly is connected to the lower end of the telescopic rod of the second cylinder. When the first claw assembly or the second claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder is compressed and retracted; or, the first buffer assembly includes a guide rod and a spring, wherein: the guide rod is installed on the driving end of the opening and closing drive mechanism in a vertical direction; the first claw assembly or the second claw assembly is installed on the guide rod, and the guide rod guides the up and down floating of the first claw assembly or the second claw assembly; the spring is sleeved on the guide rod, and the spring applies downward pressure to the first claw assembly or the second claw assembly; when the first claw assembly or the second claw assembly presses the bus bar onto the corresponding conductive sheet, the first claw assembly or the second claw assembly moves up, and the spring is compressed and retracted.

[0017] By configuring the first buffer assembly, when the first pusher claw assembly and the second pusher claw assembly are pressing the bus bar to the corresponding conductive sheet, the first buffer assembly can be extended and retracted up and down, and continuously applies downward pressure to the first pusher claw assembly or the second pusher claw assembly. In this way, the first pusher claw assembly and the second pusher claw assembly can independently float up and down, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can adaptively press the bus bars on both sides.

[0018] In some embodiments, the second cylinder is connected to a compressed air source through a second air supply system; the second air supply system includes a third pipeline and a second pressure reducing valve, wherein: one end of the third pipeline is connected to the compressed air source, and the other end of the third pipeline is connected to the rodless chamber of the second cylinder; the rod chamber of the second cylinder is connected to the atmosphere; the second pressure reducing valve is arranged on the third pipeline; the compressed air source is used to provide compressed air to the rodless chamber of the second cylinder, and the second pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the second cylinder, so that the telescopic rod of the second cylinder applies a predetermined downward pressure to the first claw assembly and the second claw assembly.

[0019] By setting up the second air supply system, it is achieved that when the first pusher claw assembly and the second pusher claw assembly are in the process of pressing the busbar to the corresponding conductive sheet, the telescopic rod of the second cylinder continuously applies a predetermined downward pressure to the first pusher claw assembly and the second pusher claw assembly, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can achieve adaptive pressing of the busbars on both sides.

[0020] In some embodiments, the second pressure claw assembly has the same structure as the first pressure claw assembly, and the first pressure claw assembly includes an adapter plate and a pressure claw, wherein the adapter plate is connected to the lower end of the telescopic rod of the first cylinder, and the pressure claw is installed on the adapter plate; the first pressure claw assembly also includes a vertical plate, which is fixedly connected to the adapter plate, and a first stopping bolt extending in a vertical direction is provided on the vertical plate, and a stopping block located below the first stopping bolt is provided on the first cylinder; when the first cylinder drives the first pressure claw assembly to descend to a low clamping position, the lower end of the first stopping bolt is pressed against the stop block.

[0021] The adapter plate is provided to achieve a stable connection between the pressure claw and the telescopic rod of the first cylinder. The cooperation of the first stop bolt and the stop block is used to limit the descending stroke of the first pressure claw assembly, ensuring that the first pressure claw assembly accurately descends to the clamping low position.

[0022] In some embodiments, the first pressing jaw assembly and the second pressing jaw assembly are respectively provided with a blowing block, and the blowing block is configured to blow air to the welding position of the busbar during the busbar welding process.

[0023] The air blowing block blows air to the welding position of the busbar during the busbar welding process, which can ensure the welding quality.

[0024] In some embodiments, the second pusher claw assembly has the same structure as the first pusher claw assembly, the first pusher claw assembly includes a sensing plate and a pusher claw, wherein the sensing plate is connected to the movable part of the first buffer assembly, and the pusher claw is mounted on the sensing plate; the busbar clamping mechanism also includes a sensor matched with the sensing plate and arranged on the fixed part or mounting bracket of the first buffer assembly, and the sensor is used to measure the rising stroke of the first pusher claw assembly.

[0025] The cooperation of the sensor and the sensor plate realizes the measurement of the rising stroke of the first pusher claw assembly and the second pusher claw assembly, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can effectively over-press the bus bar to ensure the pressing effect.

[0026] The second aspect of the present application provides a busbar clamping mechanism of another structure, which is used to clamp two pre-bent busbars on a battery string assembly onto two conductive sheets in a junction box in a one-to-one correspondence. The busbar clamping mechanism includes a lifting drive mechanism, a mounting bracket, an opening and closing drive mechanism, a first pusher claw assembly, a second pusher claw assembly, a first pressure claw assembly, a second pressure claw assembly, two first buffer assemblies, and two second buffer assemblies, wherein:

[0027] The mounting bracket is connected to the movable part of the lifting drive mechanism;

[0028] The opening and closing driving mechanism is installed on the mounting bracket, and the first claw assembly and the second claw assembly are respectively connected to the driving end of the opening and closing driving mechanism through a first buffer assembly so as to float up and down. The opening and closing driving mechanism is used to drive the first claw assembly and the second claw assembly to close or open;

[0029] The first pressing claw assembly and the second pressing claw assembly are respectively connected to the mounting bracket via a second buffer assembly so as to float up and down;

[0030] The lifting drive mechanism is configured to drive the first claw assembly, the second claw assembly, the first pressing claw assembly and the second pressing claw assembly to descend when the first claw assembly and the second claw assembly are closed, so that the first claw assembly and the first pressing claw assembly cooperate to press a pre-bent bus bar on the battery string assembly onto the corresponding conductive sheet, and the second claw assembly and the second pressing claw assembly cooperate to press another pre-bent bus bar onto the corresponding conductive sheet;

[0031] The opening and closing driving mechanism is configured to drive the first pusher claw assembly and the second pusher claw assembly to open to both sides to smooth out the two compressed bus bars.

[0032] The busbar pressing mechanism provided by the present application has a first pusher claw assembly and a second pusher claw assembly connected to the driving end of the opening and closing driving mechanism via a first buffer assembly so as to be able to float up and down, and a first pressure claw assembly and a second pressure claw assembly connected to the mounting bracket via a second buffer assembly so as to be able to float up and down, that is, the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly, and the second pressure claw assembly can independently float up and down, so that it can be ensured that even if there is a height difference between the two conductive sheets, the first pusher claw assembly and the first pressure claw assembly can press one busbar to a corresponding conductive sheet by their own floating, and the second pusher claw assembly and the second pressure claw assembly can also press the other busbar to the corresponding other conductive sheet by their own floating, and the floating of the pusher claw assemblies and the pressure claw assemblies on both sides will not restrict each other, thereby ensuring that the busbars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0033] In some embodiments, the second buffer assembly includes a first cylinder, which is mounted on a mounting bracket, and a first pressure claw assembly or a second pressure claw assembly is connected to the lower end of the telescopic rod of the first cylinder, and when the first pressure claw assembly or the second pressure claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the first cylinder is compressed and retracted; or, the second buffer assembly includes a first guide rod and a first spring, wherein: the first guide rod is mounted on the mounting bracket in a vertical direction; the first pressure claw assembly or the second pressure claw assembly is mounted on the first guide rod, and the first guide rod guides the up and down floating of the first pressure claw assembly or the second pressure claw assembly, and the first spring is sleeved on the first guide rod, and the first spring applies downward pressure to the first pressure claw assembly or the second pressure claw assembly; when the first pressure claw assembly or the second pressure claw assembly presses the bus bar onto the corresponding conductive sheet, the first pressure claw assembly or the second pressure claw assembly moves up, and the first spring is compressed and contracts.

[0034] By setting the second buffer component, when the first pressure claw component and the second pressure claw component are in the process of pressing the bus bar to the corresponding conductive sheet, the second buffer component can be extended and retracted up and down, and continuously apply downward pressure to the first pressure claw component and the second pressure claw component. In this way, the first pressure claw component and the second pressure claw component can achieve independent up and down floating, thereby ensuring that the first pressure claw component and the second pressure claw component can achieve adaptive pressing of the bus bars on both sides.

[0035] In some embodiments, the first cylinder is connected to a compressed air source through a first air supply system; the first air supply system includes a fourth pipeline and a third pressure reducing valve, wherein: one end of the fourth pipeline is connected to the compressed air source, and the other end of the fourth pipeline is connected to the rodless chamber of the first cylinder; the rod chamber of the first cylinder is connected to the atmosphere; the third pressure reducing valve is arranged on the fourth pipeline; the compressed air source is used to provide compressed air to the rodless chamber of the first cylinder, and the third pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the first cylinder, so that the telescopic rod of the first cylinder applies a predetermined downward pressure to the first pressure claw assembly and the second pressure claw assembly.

[0036] By setting up the first air supply system, it is achieved that when the first pressure claw assembly and the second pressure claw assembly are in the process of pressing the bus bar to the corresponding conductive sheet, the telescopic rod of the first cylinder continuously applies a predetermined downward pressure to the first pressure claw assembly and the second pressure claw assembly, thereby ensuring that the first pressure claw assembly and the second pressure claw assembly can achieve adaptive pressing of the bus bars on both sides.

[0037] In some embodiments, the first buffer assembly includes a second cylinder, which is installed on the driving end of the opening and closing drive mechanism. When the first claw assembly or the second claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder is compressed and retracted; or, the first buffer assembly includes a second guide rod and a second spring, wherein: the second guide rod is installed on the driving end of the opening and closing drive mechanism in a vertical direction; the first claw assembly or the second claw assembly is installed on the second guide rod, and the second guide rod guides the up and down floating of the first claw assembly or the second claw assembly, and the second spring is sleeved on the second guide rod, and the second spring applies downward pressure to the first claw assembly or the second claw assembly; when the first claw assembly or the second claw assembly presses the bus bar onto the corresponding conductive sheet, the first claw assembly or the second claw assembly moves up, and the second spring is compressed and retracted.

[0038] By configuring the first buffer assembly, when the first pusher claw assembly and the second pusher claw assembly are pressing the bus bar to the corresponding conductive sheet, the first buffer assembly can be extended and retracted up and down, and continuously apply downward pressure to the first pusher claw assembly and the second pusher claw assembly. In this way, the first pusher claw assembly and the second pusher claw assembly can independently float up and down, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can adaptively press the bus bars on both sides.

[0039] In some embodiments, the second cylinder is connected to a compressed air source through a second air supply system; the second air supply system includes a fifth pipeline and a fourth pressure reducing valve, wherein: one end of the fifth pipeline is connected to the compressed air source, and the other end of the fifth pipeline is connected to the rodless chamber of the second cylinder; the rod chamber of the second cylinder is connected to the atmosphere; the fourth pressure reducing valve is arranged on the second pipeline; the compressed air source is used to provide compressed air to the rodless chamber of the second cylinder, and the fourth pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the second cylinder, so that the telescopic rod of the second cylinder applies a predetermined downward pressure to the first claw assembly and the second claw assembly.

[0040] By setting up the second air supply system, it is achieved that when the first pusher claw assembly and the second pusher claw assembly are in the process of pressing the busbar to the corresponding conductive sheet, the telescopic rod of the second cylinder continuously applies a predetermined downward pressure to the first pusher claw assembly and the second pusher claw assembly, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can achieve adaptive pressing of the busbars on both sides.

[0041] In some embodiments, the second pressure claw assembly has the same structure as the first pressure claw assembly, and the first pressure claw assembly includes an adapter plate and a pressure claw, wherein the adapter plate is connected to the movable part of the second buffer assembly, and the pressure claw is installed on the adapter plate; a blow block is also provided on the adapter plate, and the blow block is configured to blow air to the welding position of the busbar during the busbar welding process.

[0042] By providing the adapter plate, a stable connection between the pressure claw and the second buffer assembly is achieved. The air blowing block blows air to the welding position of the busbar during the busbar welding process, which can ensure the welding quality.

[0043] In some embodiments, the second pusher claw assembly has the same structure as the first pusher claw assembly, the first pusher claw assembly includes a sensing plate and a pusher claw, wherein the sensing plate is connected to the movable part of the first buffer assembly, and the pusher claw is mounted on the sensing plate; the busbar clamping mechanism also includes a sensor matched with the sensing plate and arranged on the fixed part or mounting bracket of the first buffer assembly, and the sensor is used to measure the rising stroke of the first pusher claw assembly.

[0044] The cooperation of the sensor and the sensor plate realizes the measurement of the rising stroke of the first pusher claw assembly and the second pusher claw assembly, thereby ensuring that the first pusher claw assembly and the second pusher claw assembly can effectively over-press the bus bar to ensure the pressing effect.

[0045] In some embodiments, a stop bolt extending in a horizontal direction is provided on the fixing component of the first buffer assembly corresponding to the first claw assembly, and a stop plate is provided on the fixing component of the first buffer assembly corresponding to the second claw assembly; when the opening and closing driving mechanism drives the first claw assembly and the second claw assembly to close, the end of the stop bolt is pressed against the stop plate.

[0046] By providing the stop bolt and the stop plate, the degree of closing and gathering of the first claw assembly and the second claw assembly is limited, ensuring that when the first claw assembly and the second claw assembly are closed, there is a gap between the first claw assembly and the second claw assembly that can accommodate the first pressure claw assembly and the second pressure claw assembly. In addition, during use, the distance between the end of the stop bolt and the stop plate can be adjusted by screwing the stop bolt to implement the spacing adjustment between the first claw assembly and the second claw assembly.

[0047] The third aspect of the present application provides a junction box welding machine, which includes a conveying mechanism, a laser welding mechanism and a busbar clamping mechanism provided in any one of the first aspect or the second aspect of the present application, 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 sheets in the junction box in a one-to-one correspondence; the welding device is configured to be movable above the welding station to weld the two clamped busbars to the corresponding conductive sheets by a laser beam.

[0048] Through the cooperation of the conveying mechanism, the laser welding mechanism and the busbar pressing mechanism, the junction box welding machine in the embodiment of the present application realizes automatic welding of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a schematic structural diagram of a busbar pressing mechanism in a first working state in an embodiment of the present application at a first viewing angle;

[0050] Figure 2 is a schematic structural diagram of the busbar pressing mechanism in the first working state in the embodiment of the present application from a second viewing angle;

[0051] Figure 3 is a schematic structural diagram of the busbar pressing mechanism in the first working state in the embodiment of the present application at a third viewing angle;

[0052] Figure 4 It is a structural schematic diagram of the busbar pressing mechanism in the second working state in the embodiment of the present application;

[0053] Figure 5 Schematic diagram of the structure of the busbar pressing mechanism in the third working state in the embodiment of the present application;

[0054] Figure 6 This is a structural schematic diagram of a first air supply system in one embodiment of the present application;

[0055] Figure 7 This is a structural schematic diagram of a second gas supply system in one embodiment of the present application;

[0056] Figure 8 This is a structural schematic diagram of a first air supply system in another embodiment of the present application;

[0057] Fig. 9 This is a schematic structural diagram of a second gas supply system in another embodiment of the present application.

[0058] Figures 1 to 9 Included:

[0059] Mounting bracket 1;

[0060] Opening and closing driving mechanism 2;

[0061] The first finger assembly 3 includes a sensor plate 31, a finger 32, and a sensor 33;

[0062] A second finger assembly 4;

[0063] The first pressing claw assembly 5 includes an adapter plate 51, a pressing claw 52, ​​a vertical plate 53, a first stopping bolt 54, a stopping block 55, and an air blowing block 56;

[0064] A second pressing claw assembly 6;

[0065] Second cylinder 7;

[0066] First cylinder 8;

[0067] The first air supply system 9 includes an air intake pipeline 91, an electromagnetic reversing valve 92, a first pressure reducing valve 93, a first pipeline 94, a second pipeline 95, a fourth pipeline 96, and a third pressure reducing valve 97;

[0068] Compressed air source 10;

[0069] The second air supply system 110 includes a third pipeline 111, a second pressure reducing valve 112, a fifth pipeline 113, a fourth pressure reducing valve 114, and a muffler 115;

[0070] Stop bolt 120;

[0071] Stop plate 130 . DETAILED DESCRIPTION

[0072] 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.

[0073] In the existing busbar clamping mechanism, the relative height between the two pushers does not change, that is, the descending height of the two pushers is always consistent. When there is a height difference between the two conductive plates of the junction box, one of the pushers can press one of the busbars to the corresponding higher conductive plate, while the other pusher cannot effectively press the other busbar to the corresponding lower conductive plate, which ultimately affects the welding effect of the other busbar.

[0074] To this end, the present application provides a busbar clamping mechanism, which can implement adaptive clamping of two busbars on a battery string assembly, thereby ensuring the welding effect of the junction box.

[0075] As known to those skilled in the art, in some application scenarios, the two busbars on the battery string assembly are in an upright state, so before pressing the two busbars to the corresponding conductive sheets, the two busbars need to be bent toward the corresponding conductive sheets. In other application scenarios, the two busbars on the battery string assembly have been pre-bent, so the two busbars can be directly pressed to the corresponding conductive sheets.

[0076] The structure and working process of the busbar clamping mechanism of the present application will be exemplarily described below through two embodiments, wherein the busbar clamping mechanism in the first embodiment is used to press the two upright busbars on the battery string assembly onto the two conductive plates in the junction box in a one-to-one correspondence, and the busbar clamping mechanism in the second embodiment is used to press the two pre-bent busbars on the battery string assembly onto the two conductive plates in the junction box in a one-to-one correspondence.

[0077] First embodiment

[0078] The busbar pressing mechanism in this embodiment is used to press two upright busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence.

[0079] like Figures 1 to 3 As shown, the busbar pressing mechanism in this embodiment includes a lifting drive mechanism, a mounting bracket 1, an opening and closing drive mechanism 2, a first pusher claw assembly 3, a second pusher claw assembly 4, a first pressing claw assembly 5, a second pressing claw assembly 6, two first buffer assemblies and two second buffer assemblies, wherein:

[0080] The mounting bracket 1 is connected to the movable part of the lifting drive mechanism.

[0081] The opening and closing driving mechanism 2 is mounted on the mounting bracket 1, and the first pusher claw assembly 3 and the second pusher claw assembly 4 are respectively connected to the driving end of the opening and closing driving mechanism 2 through a first buffer assembly so as to float up and down. The opening and closing driving mechanism 2 is used to drive the first pusher claw assembly 3 and the second pusher claw assembly 4 to close or open. The opening and closing driving mechanism 2 is, for example, a clamping claw cylinder with two driving ends.

[0082] The first pressing jaw assembly 5 and the second pressing jaw assembly 6 are respectively connected to the mounting bracket 1 via a second buffer assembly so as to be able to float up and down.

[0083] The lifting drive mechanism is configured to drive the first claw assembly 3, the second claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend when the first claw assembly 3 and the second claw assembly 4 are closed, so that the first claw assembly 3 and the second claw assembly 4 extend between the two bus bars in the junction box, and the opening and closing drive mechanism 2 is configured to drive the first claw assembly 3 and the second claw assembly 4 to open to both sides to bend the two bus bars.

[0084] The lifting drive mechanism is also configured to continue to drive the first pusher claw assembly 3, the second pusher claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend, so that the first pusher claw assembly 3 and the first pressure claw assembly 5 cooperate to press one of the bent bus bars onto the corresponding conductive sheet, and the second pusher claw assembly 4 and the second pressure claw assembly 6 cooperate to press the other bent bus bar onto the corresponding conductive sheet.

[0085] In the busbar clamping mechanism of this embodiment, the first claw assembly 3 and the second claw assembly 4 are connected to the driving end of the opening and closing driving mechanism 2 via the first buffer assembly so as to be able to float up and down, and the first pressure claw assembly 5 and the second pressure claw assembly 6 are connected to the mounting bracket 1 via the second buffer assembly so as to be able to float up and down, that is, the first claw assembly 3, the second claw assembly 4, the first pressure claw assembly 5, and the second pressure claw assembly 6 can all independently float up and down.

[0086] This ensures that, even if there is a height difference between the two conductive sheets on the junction box, the first pusher claw assembly 3 and the first pressure claw assembly 5 can press one bus bar onto the corresponding conductive sheet by floating themselves, and the second pusher claw assembly 4 and the second pressure claw assembly 6 can also press the other bus bar onto the corresponding other conductive sheet by floating themselves. In addition, the floating of the pusher claw assembly and the pressure claw assembly on both sides will not restrict each other, ensuring that the bus bars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0087] Optionally, the second buffer assembly in this embodiment includes a first cylinder 8, and the first cylinder 8 is mounted on the mounting bracket 1. The first pressing claw assembly 5 and the second pressing claw assembly 6 are connected to the lower end of the telescopic rod of the corresponding first cylinder 8, and the first cylinder 8 is configured to be able to drive the first pressing claw assembly 5 or the second pressing claw assembly 6 to rise and fall. The optional pressing process of the busbar clamping mechanism in this embodiment on the two upright busbars is as follows:

[0088] First, if Figure 4As shown, the two first cylinders 8 synchronously drive the first pressing jaw assembly 5 and the second clamping jaw assembly 6 to rise to the avoidance high position, thereby leaving space for the closing of the first pusher jaw assembly 3 and the second pusher jaw assembly 4.

[0089] Next, the opening and closing driving mechanism 2 drives the first pusher claw assembly 3 and the second pusher claw assembly 4 to move toward the middle and close. Subsequently, the lifting driving mechanism drives the first pusher claw assembly 3, the second pusher claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend until the first pusher claw assembly 3 and the second pusher claw assembly 4 in the closed state extend between the two bus bars.

[0090] Next, the opening and closing driving mechanism 2 drives the first pusher claw assembly 3 and the second pusher claw assembly 4 to open, and the first pusher claw assembly 3 and the second pusher claw assembly 4 push the two bus bars to both sides, thereby bending the two bus bars.

[0091] Then, if Figure 5 As shown, the two first cylinders 8 synchronously drive the first pressure jaw assembly 5 and the second clamping jaw assembly 6 to descend to the clamping low position, so that the first pressure jaw assembly 5 and the second clamping jaw assembly 6 enter between the first pusher jaw assembly 3 and the second pusher jaw assembly 4.

[0092] Then, the lifting drive mechanism continues to drive the first pusher claw assembly 3, the second pusher claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend, so that the first pusher claw assembly 3 and the first pressure claw assembly 5 press one bus bar onto a corresponding conductive sheet, and the second pusher claw assembly 4 and the second pressure claw assembly 6 press another bus bar onto another corresponding conductive sheet.

[0093] In particular, when the first pressing claw assembly 5 and the second pressing claw assembly 6 press the bus bar onto the corresponding conductive sheet, the telescopic rod of the corresponding first cylinder 8 can adaptively retract after being compressed, so that the first pressing claw assembly 5 and the second pressing claw assembly 6 can independently float up and down, ultimately ensuring that the first pressing claw assembly 5 and the second pressing claw assembly 6 can achieve adaptive pressing of the bus bars on both sides.

[0094] It can be seen that the first cylinder 8 in this embodiment not only serves as a lifting drive to lift the first pressing claw assembly 5 or the second pressing claw assembly 6, so as to adjust the height of the first pressing claw assembly 5 or the second pressing claw assembly 6. It also serves as a buffer connection to achieve a buffer connection between the first pressing claw assembly 5 or the second pressing claw assembly 6 and the mounting bracket 1, so that the first pressing claw assembly 5 or the second pressing claw assembly 6 can independently float up and down when pressing the busbar, and finally ensure that the first pressing claw assembly 5 and the second pressing claw assembly 6 can achieve adaptive pressing of the busbars on both sides.

[0095] like Figure 6As shown, optionally, the first cylinder 8 is connected to the compressed air source 10 through the first air supply system 9. The first air supply system 9 includes an intake pipeline 91, an electromagnetic reversing valve 92, a first pressure reducing valve 93, a first pipeline 94 and a second pipeline 95, wherein: one end of the intake pipeline 91 is connected to the compressed air source 10, and the other end of the intake pipeline 91 is connected to the electromagnetic reversing valve 92. One end of the first pipeline 94 is connected to the electromagnetic reversing valve 92, and the other end of the first pipeline 94 is connected to the rodless cavity of the first cylinder 8. One end of the second pipeline 95 is connected to the electromagnetic reversing valve 92, and the other end of the second pipeline 95 is connected to the rod cavity of the first cylinder 8. The electromagnetic reversing valve 92 is used to control the intake pipeline 91 to be connected to the first pipeline 94 or the second pipeline 95. The first pressure reducing valve 93 is arranged on the first pipeline 94, and of course, the first pressure reducing valve 93 can also be arranged on the intake pipeline 91.

[0096] When the electromagnetic reversing valve 92 controls the air intake pipeline 91 to be connected with the first pipeline 94, the compressed air sequentially enters the rodless chamber of the first cylinder 8 through the air intake pipeline 91 and the first pipeline 94, and the first pressure reducing valve 93 is used to adjust the pressure of the compressed air entering the rodless chamber, so that the telescopic rod of the first cylinder 8 applies a predetermined downward pressure to the first pressing claw assembly 5 or the second pressing claw assembly 6. When the electromagnetic reversing valve 92 controls the air intake pipeline 91 to be connected with the second pipeline 95, the compressed air sequentially enters the rod chamber of the first cylinder 8 through the air intake pipeline 91 and the second pipeline 95, so that the telescopic rod of the first cylinder 8 drives the first pressing claw assembly 5 or the second pressing claw assembly 6 to rise.

[0097] Specifically, before the lifting drive mechanism drives the first pusher claw assembly 3, the second pusher claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend, the electromagnetic reversing valve 92 controls the air intake pipeline 91 to be connected with the second pipeline 95, so that the telescopic rod of the first cylinder 8 drives the first pressure claw assembly 5 or the second pressure claw assembly 6 to rise to the avoidance high position, thereby leaving space for the closing of the first pusher claw assembly 3 and the second pusher claw assembly 4.

[0098] After the first pusher claw assembly 3 and the second pusher claw assembly 4 bend the two bus bars, the electromagnetic reversing valve 92 controls the air intake pipeline 91 to be connected with the first pipeline 94, so that the telescopic rod of the first cylinder applies downward pressure to the first pressure claw assembly 5 or the second pressure claw assembly 6, so that the first pressure claw assembly 5 or the second pressure claw assembly 6 drops to the clamping low position.

[0099] During the process of the first pressing claw assembly 5 and the second pressing claw assembly 6 pressing the bus bar to the corresponding conductive sheet, the electromagnetic reversing valve 92 controls the air intake pipe 91 to keep connected with the first pipe 94, so that the telescopic rod of the first cylinder 8 continuously applies a predetermined downward pressure to the first pressing claw assembly 5 or the second pressing claw assembly 6. In this way, the first pressing claw assembly 5 and the second pressing claw assembly 6 can achieve independent up and down floating, thereby ensuring that the first pressing claw assembly 5 and the second pressing claw assembly 6 can achieve adaptive pressing of the bus bars on both sides.

[0100] In addition, by adjusting the intake pressure through the first pressure reducing valve 93, it can be achieved that the telescopic rods of the two first cylinders 8 apply equal downward pressure to the first pressing claw assembly 5 and the second pressing claw assembly 6. In this way, even if there is a height difference between the two conductive sheets, the pressing force from the first pressing claw assembly 5 and the second pressing claw assembly 6 on the two conductive sheets can always be kept equal, thereby avoiding the battery string assembly from being overly compressed locally and causing hidden cracks in the battery sheets therein.

[0101] Optionally, the first buffer assembly in this embodiment includes a second cylinder 7, which is installed on the driving end of the opening and closing drive mechanism 2, and the first claw assembly 3 or the second claw assembly 4 is connected to the lower end of the telescopic rod of the second cylinder 7. When the first claw assembly 3 or the second claw assembly 4 presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder 7 is compressed and retracted.

[0102] It can be seen that the second cylinder 7 in this embodiment only serves as a buffer connection member to realize the buffer connection between the first pusher claw assembly 3 or the second pusher claw assembly 4 and the driving end of the opening and closing driving mechanism 2, so that the first pusher claw assembly 3 or the second pusher claw assembly 4 can independently float up and down when pressing the bus bar, and finally ensure that the first pusher claw assembly 3 and the second pusher claw assembly 4 can realize adaptive pressing of the bus bars on both sides.

[0103] like Figure 7 As shown, optionally, the second cylinder 7 is connected to the compressed air source 10 through the second air supply system 110. The second air supply system 110 includes a third pipeline 111 and a second pressure reducing valve 112, wherein: one end of the third pipeline 111 is connected to the compressed air source 10, and the other end of the third pipeline 111 is connected to the rodless chamber of the second cylinder 7. The rod chamber of the second cylinder 7 is connected to the atmosphere, for example, the second cylinder 7 can be connected to the atmosphere through a muffler 115. The second pressure reducing valve 112 is arranged on the third pipeline 111. The compressed air source 10 is used to provide compressed air to the rodless chamber of the second cylinder 7, and the second pressure reducing valve 112 is used to adjust the pressure of the compressed air entering the rodless chamber of the second cylinder 7, so that the telescopic rod of the second cylinder 7 applies a predetermined downward pressure to the first pusher claw assembly 3 or the second pusher claw assembly 4.

[0104] When the first pusher claw assembly 3 and the second pusher claw assembly 4 are pressing the busbars to the corresponding conductive sheets, the telescopic rod of the second cylinder 7 continuously applies a predetermined downward pressure to the first pusher claw assembly 3 and the second pusher claw assembly 4. In this way, the first pusher claw assembly 3 and the second pusher claw assembly 4 can independently float up and down, thereby ensuring that the first pusher claw assembly 3 and the second pusher claw assembly 4 can adaptively press the busbars on both sides.

[0105] In addition, by adjusting the intake pressure through the second pressure reducing valve 112, it can be achieved that the telescopic rods of the two second cylinders 7 apply equal downward pressure to the first claw assembly 3 and the second claw assembly 4. In this way, even if there is a height difference between the two conductive sheets, the pressing forces from the first claw assembly 3 and the second claw assembly 4 on the two conductive sheets can always be kept equal, thereby avoiding the occurrence of hidden cracks in the battery cells in the battery string assembly due to excessive local pressure.

[0106] Of course, the first buffer assembly can also adopt buffer connectors of other structures. For example, the first buffer assembly includes a guide rod and a spring, wherein: the guide rod is installed on the driving end of the opening and closing driving mechanism in the vertical direction. The first pusher claw assembly 3 or the second pusher claw assembly 4 is installed on the guide rod. The guide rod guides the up and down floating of the first pusher claw assembly 3 or the second pusher claw assembly 4. The spring is sleeved on the guide rod, and the spring applies downward pressure to the first pusher claw assembly 3 or the second pusher claw assembly 4. When the first pusher claw assembly 3 or the second pusher claw assembly 4 presses the bus bar onto the corresponding conductive sheet, the first pusher claw assembly 3 or the second pusher claw assembly 4 moves up, and the spring contracts under pressure.

[0107] Taking the first pusher claw assembly 3 as an example, optionally, one end of the guide rod is fixedly connected to the driving end of the opening and closing drive mechanism 2 and one of the first pusher claw assembly 3, the other end of the guide rod is slidably connected to the driving end of the opening and closing drive mechanism 2 and the other of the first pusher claw assembly 3, the upper end of the spring abuts against the driving end of the opening and closing drive mechanism 2, and the lower end of the spring abuts against the first pusher claw assembly 3.

[0108] Optionally, the second pressing claw assembly 6 has the same structure as the first pressing claw assembly 5. Figures 1 to 3 As shown, taking the first pressing claw assembly 5 as an example, it includes an adapter plate 51 and a pressing claw 52, ​​wherein the adapter plate 51 is connected to the lower end of the telescopic rod of the first cylinder 8, and the pressing claw 52 is installed on the adapter plate 51. By setting the adapter plate 51, a stable connection between the pressing claw 52 and the telescopic rod of the first cylinder 8 is achieved.

[0109] Optionally, the first pressure jaw assembly 5 further includes a vertical plate 53, the vertical plate 53 is fixedly connected to the adapter plate 51, a first stop bolt 54 extending in the vertical direction is provided on the vertical plate 53, and a stop block 55 located below the first stop bolt 54 is provided on the first cylinder 8. When the first cylinder 8 drives the first pressure jaw assembly 5 to descend to the clamping low position, the lower end of the first stop bolt 54 presses against the stop block 55.

[0110] Through the cooperation of the first stop bolt 54 and the stop block 55 , the descending stroke of the first pressing jaw assembly 5 is limited, ensuring that the first pressing jaw assembly 5 is accurately descended to the clamping low position.

[0111] During specific use, the height of the lower end of the first stopping bolt 54 can be adjusted by screwing the first stopping bolt 54 according to the height of the clamping low position.

[0112] Optionally, the first pressing jaw assembly 5 and the second pressing jaw assembly 6 are respectively provided with a blowing block 56 , and the blowing block 56 is configured to blow air to the welding position of the busbar during the busbar welding process, so as to ensure the welding quality.

[0113] Optionally, the second pusher claw assembly 4 has the same structure as the first pusher claw assembly 3. Figure 3 As shown, taking the first pusher claw assembly 3 as an example, it includes a sensing plate 31 and a pusher claw 32, wherein the sensing plate 31 is connected to the movable part of the first buffer assembly, and the pusher claw 32 is installed on the sensing plate 31. The busbar pressing mechanism also includes a sensor 33 matched with the sensing plate 31 and arranged on the fixed part or the mounting bracket 1 of the first buffer assembly, and the sensor 33 is used to measure the rising stroke of the first pusher claw assembly 3.

[0114] The cooperation between the sensor 33 and the sensor plate 31 realizes the measurement of the rising stroke of the first pusher claw assembly 3 and the second pusher claw assembly 4, thereby ensuring that the first pusher claw assembly 3 and the second pusher claw assembly 4 can effectively apply overpressure to the bus bar to ensure the pressing effect.

[0115] The sensor 33 may be a contact displacement sensor, a laser displacement sensor or other existing sensors capable of sensing the sensing plate 31 .

[0116] Second embodiment

[0117] The busbar pressing mechanism in this embodiment is used to press two pre-bent busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence.

[0118] Since the busbar pressing mechanism in this embodiment has a substantially same structure as the busbar pressing mechanism in the first embodiment described above, the busbar pressing mechanism is still used for the convenience of description. Figures 1 to 3The structure and working process of the busbar pressing mechanism in this embodiment are described.

[0119] like Figures 1 to 3 As shown, the busbar pressing mechanism in this embodiment includes a lifting drive mechanism, a mounting bracket 1, an opening and closing drive mechanism 2, a first pusher claw assembly 3, a second pusher claw assembly 4, a first pressing claw assembly 5, a second pressing claw assembly 6, two first buffer assemblies and two second buffer assemblies, wherein:

[0120] The mounting bracket 1 is connected to the movable part of the lifting drive mechanism.

[0121] The opening and closing driving mechanism 2 is mounted on the mounting bracket 1, and the first pusher claw assembly 3 and the second pusher claw assembly 4 are respectively connected to the driving end of the opening and closing driving mechanism 2 through a first buffer assembly so as to float up and down. The opening and closing driving mechanism 2 is used to drive the first pusher claw assembly 3 and the second pusher claw assembly 4 to close or open. The opening and closing driving mechanism 2 is, for example, a clamping claw cylinder with two driving ends.

[0122] The first pressing jaw assembly 5 and the second pressing jaw assembly 6 are respectively connected to the mounting bracket 1 via a second buffer assembly so as to be able to float up and down.

[0123] The lifting drive mechanism is configured to drive the first claw assembly 3, the second claw assembly 4, the first pressing claw assembly 5 and the second pressing claw assembly 6 to descend when the first claw assembly 3 and the second claw assembly 4 are closed, so that the first claw assembly 3 and the first pressing claw assembly 4 cooperate to press a pre-bent bus bar on the battery string assembly onto the corresponding conductive sheet, and the second claw assembly 4 and the second pressing claw assembly 6 cooperate to press another pre-bent bus bar onto the corresponding conductive sheet.

[0124] The opening and closing driving mechanism 2 is configured to drive the first pusher claw assembly 3 and the second pusher claw assembly 4 to open to both sides to smooth out the two compressed bus bars.

[0125] It can be seen that, similar to the busbar clamping mechanism in the first embodiment described above, the busbar clamping mechanism in this embodiment has the first claw assembly 3 and the second claw assembly 4 connected to the driving end of the opening and closing driving mechanism 2 via the first buffer assembly so as to be able to float up and down, and the first pressure claw assembly 5 and the second pressure claw assembly 6 are connected to the mounting bracket 1 via the second buffer assembly so as to be able to float up and down, that is, the first claw assembly 3, the second claw assembly 4, the first pressure claw assembly 5, and the second pressure claw assembly 6 can all independently float up and down.

[0126] This ensures that, even if there is a height difference between the two conductive sheets, the first pusher claw assembly 3 and the first pressure claw assembly 5 can press one bus bar onto the corresponding conductive sheet by floating themselves, and the second pusher claw assembly 4 and the second pressure claw assembly 6 can also press the other bus bar onto the corresponding other conductive sheet by floating themselves. In addition, the floating of the pusher claw assemblies and the pressure claw assemblies on both sides will not restrict each other, ensuring that the bus bars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0127] It should be noted that the first pressing claw assembly 5 and the second pressing claw assembly 6 are located between the first claw assembly 3 and the second claw assembly 4. Therefore, the "closed" mentioned in this embodiment does not mean that the first claw assembly 3 and the second claw assembly 4 are completely close to each other, but means that the distance between the pressing ends of the first claw assembly 3 and the second claw assembly 4 when they are closed is smaller than the distance between the first claw assembly 3 and the second claw assembly 4 when they are opened, so as to ensure that after the first claw assembly 3 and the second claw assembly 4 press the bus bar, the opening and closing driving mechanism 2 can drive the first claw assembly 3 and the second claw assembly 4 to open to both sides to smooth the two pressed bus bars. Figure 1 to Figure 2 As shown, since there is a gap between the first pusher claw assembly 3 and the second pusher claw assembly 4 in the closed state, the first pressing claw assembly 5 and the second pressing claw assembly 6 can be accommodated between the first pusher claw assembly 3 and the second pusher claw assembly 4 .

[0128] like Figure 2 As shown, optionally, a stop plate 130 is provided on the fixing part of the first buffer assembly corresponding to the first pusher claw assembly 3, and a stop bolt 120 extending in the horizontal direction and cooperating with the stop plate 130 is provided on the fixing part of the first buffer assembly corresponding to the second pusher claw assembly 4. When the opening and closing driving mechanism 2 drives the first pusher claw assembly 3 and the second pusher claw assembly 4 to close, the end of the stop bolt 120 presses against the stop plate 130. Of course, the setting positions of the stop plate 130 and the stop bolt 120 can also be exchanged.

[0129] By providing the stop bolt 120 and the stop plate 130, the degree of closing and gathering of the first claw assembly 3 and the second claw assembly 4 is limited, ensuring that when the first claw assembly 3 and the second claw assembly 4 are closed, there is a gap between the first claw assembly 3 and the second claw assembly 4 that can accommodate the first pressing claw assembly 5 and the second pressing claw assembly 6. Of course, during use, the distance between the end of the stop bolt 120 and the stop plate 130 can be adjusted by screwing the stop bolt 120 to implement the spacing adjustment between the first claw assembly 3 and the second claw assembly 4.

[0130] In addition, it should be noted that when the busbar clamping mechanism in this embodiment is used to clamp two pre-bent busbars one by one to two conductive sheets in the junction box, if the pre-bent busbars have a high flatness, there is no need to flatten the busbars.

[0131] That is to say, the opening and closing driving mechanism 2 can first drive the first claw assembly 3 and the second claw assembly 4 to open to both sides, so that the first claw assembly 3, the second claw assembly 4, the first pressing claw assembly 5 and the second pressing claw assembly 6 in the busbar pressing mechanism are in a closed position. Figure 5 In the state, the lifting drive mechanism drives the first claw assembly 3, the second claw assembly 4, the first pressure claw assembly 5 and the second pressure claw assembly 6 to descend, so that the first claw assembly 3 and the first pressure claw assembly 5 cooperate to press a pre-bent bus bar on the battery string assembly onto the corresponding conductive sheet, and the second claw assembly 4 and the second pressure claw assembly 6 cooperate to press another pre-bent bus bar onto the corresponding conductive sheet.

[0132] Optionally, the second buffer assembly in this embodiment includes a first cylinder 8, which is mounted on a mounting bracket 1, and a first pressure claw assembly 5 or a second pressure claw assembly 6 is connected to the lower end of the telescopic rod of the first cylinder 8. When the first pressure claw assembly 5 or the second pressure claw assembly 6 presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the first cylinder 8 is compressed and retracted.

[0133] The first cylinder 8 in this embodiment is only used as a buffer connection to achieve a buffer connection between the first pressure claw assembly 5 or the second pressure claw assembly 6 and the mounting bracket 1, so that the first pressure claw assembly 5 or the second pressure claw assembly 6 can achieve independent up and down floating when pressing the bus bar, ultimately ensuring that the first pressure claw assembly 5 or the second pressure claw assembly 6 can achieve adaptive pressing of the bus bars on both sides.

[0134] like Figure 8 As shown, optionally, the first cylinder 8 in this embodiment is connected to the compressed air source 10 through the first air supply system 9. The first air supply system 9 includes a fourth pipeline 96 and a third pressure reducing valve 97, wherein: one end of the fourth pipeline 96 is connected to the compressed air source 10, and the other end of the fourth pipeline 96 is connected to the rodless chamber of the first cylinder 8. The rod chamber of the first cylinder 8 is connected to the atmosphere, for example, through a muffler 115. The third pressure reducing valve 97 is arranged on the fourth pipeline 96. The compressed air source 10 is used to provide compressed air to the rodless chamber of the first cylinder 8, and the third pressure reducing valve 97 is used to adjust the pressure of the compressed air entering the rodless chamber of the first cylinder 8, so that the telescopic rod of the first cylinder 8 applies a predetermined downward pressure to the first pressure claw assembly 5 or the second pressure claw assembly 6.

[0135] When the first pressing jaw assembly 5 and the second pressing jaw assembly 6 are pressing the busbar to the corresponding conductive sheet, the telescopic rod of the first cylinder 8 continuously applies a predetermined downward pressure to the first pressing jaw assembly 5 or the second pressing jaw assembly 6. In this way, the first pressing jaw assembly 5 and the second pressing jaw assembly 6 can achieve independent up and down floating, thereby ensuring that the first pressing jaw assembly 5 and the second pressing jaw assembly 6 can achieve adaptive pressing of the busbars on both sides.

[0136] In addition, by adjusting the intake pressure through the third pressure reducing valve 97, it can be achieved that the telescopic rods of the two first cylinders 8 apply equal downward pressure to the first pressing claw assembly 5 and the second pressing claw assembly 6. In this way, even if there is a height difference between the two conductive sheets, the pressing force from the first pressing claw assembly 5 and the second pressing claw assembly 6 on the two conductive sheets can always be kept equal, thereby avoiding the battery string assembly from being partially over-pressed and causing the battery cells therein to crack.

[0137] Of course, the second buffer assembly can also adopt buffer connectors of other structures, for example, the second buffer assembly includes a first guide rod and a first spring, wherein: the first guide rod is mounted on the mounting bracket 1 in the vertical direction. The first pressing claw assembly 5 or the second pressing claw assembly 6 is mounted on the first guide rod, the first guide rod guides the up and down floating of the first pressing claw assembly 5 or the second pressing claw assembly 6, the first spring is sleeved on the first guide rod, and the first spring applies downward pressure to the first pressing claw assembly 5 or the second pressing claw assembly 6. When the first pressing claw assembly 5 or the second pressing claw assembly 6 presses the busbar onto the corresponding conductive sheet, the first pressing claw assembly 5 or the second pressing claw assembly 6 moves up, and the first spring contracts under pressure.

[0138] Taking the first pressure claw assembly 5 as an example, optionally, one end of the first guide rod is fixedly connected to one of the mounting bracket 1 and the first pressure claw assembly 5, and the other end of the first guide rod is slidably connected to the other of the mounting bracket 1 and the first pressure claw assembly 5, 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 pressure claw assembly 5.

[0139] Optionally, the first buffer assembly in this embodiment includes a second cylinder 7, which is installed on the driving end of the opening and closing drive mechanism 2. When the first claw assembly 3 or the second claw assembly 4 presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder 7 is compressed and retracted.

[0140] The second cylinder 7 in this embodiment is also used only as a buffer connection member to achieve a buffer connection between the first pusher claw assembly 3 or the second pusher claw assembly 4 and the driving end of the opening and closing driving mechanism 2, so that the first pusher claw assembly 3 or the second pusher claw assembly 4 can independently float up and down when pressing the bus bar, and finally ensure that the first pusher claw assembly 3 or the second pusher claw assembly 4 can achieve adaptive pressing of the bus bars on both sides.

[0141] like Fig. 9 As shown, optionally, the second cylinder 7 is connected to the compressed air source 10 through the second air supply system 110. The second air supply system 110 includes a fifth pipeline 113 and a fourth pressure reducing valve 114, wherein: one end of the fifth pipeline 113 is connected to the compressed air source 10, and the other end of the fifth pipeline 113 is connected to the rodless cavity of the second cylinder 7. The rod cavity of the second cylinder 7 is connected to the atmosphere. The fourth pressure reducing valve 114 is arranged on the fifth pipeline 113. The compressed air source 10 is used to provide compressed air to the rodless cavity of the second cylinder 7, and the fourth pressure reducing valve 114 is used to adjust the pressure of the compressed air entering the rodless cavity of the second cylinder 7, so that the telescopic rod of the second cylinder 7 applies a predetermined downward pressure to the first pusher claw assembly 3 and the second pusher claw assembly 4.

[0142] When the first pusher claw assembly 3 and the second pusher claw assembly 4 are pressing the busbars to the corresponding conductive sheets, the telescopic rod of the second cylinder 7 continuously applies a predetermined downward pressure to the first pusher claw assembly 3 and the second pusher claw assembly 4. In this way, the first pusher claw assembly 3 and the second pusher claw assembly 4 can independently float up and down, thereby ensuring that the first pusher claw assembly 3 and the second pusher claw assembly 4 can adaptively press the busbars on both sides.

[0143] In addition, by adjusting the intake pressure through the fourth pressure reducing valve 114, it can be achieved that the telescopic rods of the two second cylinders 7 apply equal downward pressure to the first claw assembly 3 and the second claw assembly 4. In this way, even if there is a height difference between the two conductive sheets, the pressing forces from the first claw assembly 3 and the second claw assembly 4 on the two conductive sheets can always be kept equal, thereby avoiding the occurrence of hidden cracks in the battery cells in the battery string assembly due to excessive local pressure.

[0144] Of course, the first buffer assembly may also adopt buffer connectors of other structures, for example, the first buffer assembly includes a second guide rod and a second spring, wherein: the second guide rod is mounted on the driving end of the opening and closing driving mechanism 2 in the vertical direction. The first pusher claw assembly 3 or the second pusher claw assembly 4 is mounted on the second guide rod. The second guide rod guides the up and down floating of the first pusher claw assembly 3 or the second pusher claw assembly 4. The second spring is sleeved on the second guide rod, and the second spring applies downward pressure to the first pusher claw assembly 3 or the second pusher claw assembly 4. When the first pusher claw assembly 3 or the second pusher claw assembly 4 presses the bus bar onto the corresponding conductive sheet, the first pusher claw assembly 3 or the second pusher claw assembly 4 moves upward, and the second spring contracts under pressure.

[0145] Taking the first pusher claw assembly 3 as an example, optionally, one end of the second guide rod is fixedly connected to the driving end of the opening and closing drive mechanism 2 and one of the first pusher claw assembly 3, the other end of the second guide rod is slidably connected to the driving end of the opening and closing drive mechanism 2 and the other of the first pusher claw assembly 3, the upper end of the second spring abuts against the driving end of the opening and closing drive mechanism 2, and the lower end of the second spring abuts against the first pusher claw assembly 3.

[0146] Optionally, the second pressure jaw assembly 6 has the same structure as the first pressure jaw assembly 5. Taking the first pressure jaw assembly 5 as an example, it includes an adapter plate 51 and a pressure jaw 52, ​​wherein the adapter plate 51 is connected to the movable part of the second buffer assembly, and the pressure jaw 52 is installed on the adapter plate 51. A blowing block 56 is also provided on the adapter plate, and the blowing block 56 is configured to blow air to the welding position of the busbar during the busbar welding process.

[0147] The adapter plate 51 is provided to achieve a stable connection between the pressure claw 52 and the second buffer assembly. The air blowing block 56 blows air to the welding position of the busbar during the busbar welding process, which can ensure the welding quality.

[0148] Optionally, the second pusher claw assembly 4 has the same structure as the first pusher claw assembly 3. Taking the first pusher claw assembly 323 as an example, it includes a sensing plate 31 and a pusher claw 32, wherein the sensing plate 31 is connected to the movable part of the first buffer assembly, and the pusher claw 32 is installed on the sensing plate 31. The busbar clamping mechanism also includes a sensor 33 matched with the sensing plate 31 and arranged on the fixed part or the mounting bracket 1 of the first buffer assembly, and the sensor 33 is used to measure the rising stroke of the first pusher claw assembly 4.

[0149] The cooperation between the sensor 33 and the sensor plate 31 realizes the measurement of the rising stroke of the first pusher claw assembly 3 and the second pusher claw assembly 4, thereby ensuring that the first pusher claw assembly 3 and the second pusher claw assembly 4 can effectively apply overpressure to the bus bar to ensure the pressing effect.

[0150] The present application also provides a busbar pressing method, which can implement adaptive pressing of two busbars on a battery string assembly, thereby ensuring the welding effect of the junction box.

[0151] The following will exemplarily describe the execution process of the busbar pressing method of the present application through two embodiments, wherein: the busbar pressing method in the third embodiment is used to press the two upright busbars on the battery string assembly onto the two conductive plates in the junction box one by one, and the busbar pressing method in the fourth embodiment is used to press the two pre-bent busbars on the battery string assembly onto the two conductive plates in the junction box one by one.

[0152] Third embodiment

[0153] The busbar pressing method in this embodiment is used to press two upright busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. It is implemented by the busbar pressing mechanism provided in the first embodiment of the present application. The busbar pressing method in this embodiment includes:

[0154] The opening and closing driving mechanism drives the first pusher claw assembly and the second pusher claw assembly to close.

[0155] The lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, so that the first claw assembly and the second claw assembly extend between two bus bars on the battery string assembly.

[0156] The opening and closing driving mechanism drives the first pusher claw assembly and the second pusher claw assembly to open to both sides to bend two bus bars.

[0157] The lifting drive mechanism continues to drive the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, so that the first claw assembly and the first pressure claw assembly cooperate to press one of the bent bus bars onto the corresponding conductive sheet, and the second claw assembly and the second pressure claw assembly cooperate to press the other bent bus bar onto the corresponding conductive sheet.

[0158] The busbar pressing method in this embodiment realizes pressing two upright busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. In particular, since the first pusher claw assembly and the second pusher claw assembly are respectively connected to the driving end of the opening and closing driving mechanism via the first buffer assembly and can float up and down, and the first pressure claw assembly and the second pressure claw assembly are respectively connected to the mounting bracket via the second buffer assembly and can float up and down, the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly, and the second pressure claw assembly can all independently float up and down.

[0159] In this way, it can be ensured that even if there is a height difference between the two conductive sheets, when the lifting drive mechanism continues to drive the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the first pusher claw assembly and the first pressure claw assembly can press one bus bar onto a corresponding conductive sheet by their own floating, and the second pusher claw assembly and the second pressure claw assembly can also press another bus bar onto another corresponding conductive sheet by their own floating, and the floating of the pusher claw assemblies and the pressure claw assemblies on both sides will not restrict each other, thereby ensuring that the bus bars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0160] Optionally, before the opening and closing driving mechanism drives the first claw assembly and the second claw assembly to close, the busbar pressing method in this embodiment further includes:

[0161] The first cylinder drives the first pressing jaw assembly and the second pressing jaw assembly to rise to the avoidance high position.

[0162] In this way, space can be reserved for the closing of the first pusher claw assembly and the second pusher claw assembly, ensuring that the opening and closing drive mechanism can drive the first pusher claw assembly and the second pusher claw assembly to move toward the middle and close.

[0163] In addition, after the opening and closing driving mechanism drives the first claw assembly and the second claw assembly to open to both sides to bend the two bus bars, the bus bar pressing method further includes:

[0164] The first cylinder drives the first pressure claw assembly and the second pressure claw assembly to descend to the low compression position, so that the first pressure claw assembly or the second pressure claw assembly enters between the first pusher claw assembly and the second pusher claw assembly. When the first pressure claw assembly and the second pressure claw assembly descend to the low compression position, the height of the first pressure claw assembly and the second pressure claw assembly is not higher than the height of the first pusher claw assembly and the second pusher claw assembly.

[0165] In this way, when the lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to continue to descend, the first pressure claw assembly and the first claw assembly can cooperate to press one bus bar onto the corresponding conductive sheet, and the second pressure claw assembly and the second claw assembly can cooperate to press another bus bar onto the corresponding conductive sheet. In addition, by setting the height of the first pressure claw assembly and the second pressure claw assembly to be no higher than the height of the first claw assembly and the second claw assembly, it can be achieved that during the descent process, the first claw assembly and the second claw assembly can press the bus bar later than the first pressure claw assembly and the second pressure claw assembly, or the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly press the bus bar at the same time, thereby avoiding the bus bar between the first claw assembly and the first pressure claw assembly and the bus bar between the second claw assembly and the second pressure claw assembly from arching.

[0166] For further implementation details of the busbar pressing method in this embodiment, reference may be made to the relevant description of the busbar pressing device in the first embodiment above, which will not be repeated here.

[0167] Fourth embodiment

[0168] The busbar pressing method in this embodiment is used to press two pre-bent busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. It is implemented by the busbar pressing mechanism provided in the second embodiment of the present application. The busbar pressing method in this embodiment includes:

[0169] The opening and closing driving mechanism drives the first pusher claw assembly and the second pusher claw assembly to close.

[0170] The lifting drive mechanism drives the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, so that the first claw assembly and the first pressure claw assembly cooperate to press a pre-bent bus bar on the battery string assembly onto the corresponding conductive sheet, and the second claw assembly and the second pressure claw assembly cooperate to press another pre-bent bus bar onto the corresponding conductive sheet.

[0171] The opening and closing driving mechanism drives the first pusher claw assembly and the second pusher claw assembly to open to both sides to smooth out the two compressed bus bars.

[0172] Similarly, the busbar pressing method in this embodiment realizes pressing two upright busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. In particular, since the first pusher claw assembly and the second pusher claw assembly are respectively connected to the driving end of the opening and closing driving mechanism via the first buffer assembly and can float up and down, and the first pressure claw assembly and the second pressure claw assembly are respectively connected to the mounting bracket via the second buffer assembly and can float up and down, the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly, and the second pressure claw assembly can all independently float up and down.

[0173] In this way, it can be ensured that even if there is a height difference between the two conductive sheets, when the lifting drive mechanism continues to drive the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the first pusher claw assembly and the first pressure claw assembly can press one bus bar onto a corresponding conductive sheet by their own floating, and the second pusher claw assembly and the second pressure claw assembly can also press another bus bar onto another corresponding conductive sheet by their own floating, and the floating of the pusher claw assemblies and the pressure claw assemblies on both sides will not restrict each other, thereby ensuring that the bus bars on both sides can be adaptively pressed, thereby ensuring the welding effect.

[0174] Optionally, after the opening and closing drive mechanism drives the first claw assembly and the second claw assembly to close, the first pressure claw assembly and the second pressure claw assembly are located between the first claw assembly and the second claw assembly, and the heights of the first pressure claw assembly and the second pressure claw assembly are flush with those of the first claw assembly and the second claw assembly.

[0175] The first pressing claw assembly and the second pressing claw assembly are located between the first pusher claw assembly and the second pusher claw assembly and the four are flush in height. When the lifting drive mechanism drives the first pusher claw assembly, the second pusher claw assembly, the first pressing claw assembly and the second pressing claw assembly to continue to descend, the first pressing claw assembly and the first pusher claw assembly can simultaneously press one bus bar onto the corresponding conductive sheet, and the second pressing claw assembly and the second pusher claw assembly can simultaneously press another bus bar onto the corresponding conductive sheet, thereby ensuring the pressing effect on the bus bar and facilitating the subsequent leveling operation.

[0176] For further implementation details of the busbar pressing method in this embodiment, reference may be made to the relevant description of the busbar pressing device in the first embodiment above, which will not be repeated here.

[0177] The present application also provides a junction box welding machine, which includes a conveying mechanism, a laser welding mechanism and a busbar clamping mechanism provided in any one of the first aspect or the second aspect of the present application, 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 the junction box in a one-to-one correspondence; the welding device is configured to be movable above the welding station to weld the two clamped busbars to the corresponding conductive plates by a laser beam.

[0178] Through the cooperation of the conveying mechanism, the laser welding mechanism and the busbar pressing mechanism, the junction box welding machine in the embodiment of the present application realizes automatic welding of the junction box.

[0179] 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 clamping mechanism, characterized in that: The busbar clamping mechanism is used to clamp two upright busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. The busbar clamping mechanism includes a lifting drive mechanism, a mounting bracket, an opening and closing drive mechanism, a first pusher claw assembly, a second pusher claw assembly, a first pressure claw assembly, a second pressure claw assembly, two first buffer assemblies and two second buffer assemblies, wherein: The mounting bracket is connected to the movable component of the lifting drive mechanism; The opening and closing driving mechanism is mounted on the mounting bracket, the first pusher claw assembly and the second pusher claw assembly are respectively connected to the driving end of the opening and closing driving mechanism via the first buffer assembly 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 assembly and the second pusher claw assembly to close or open; The first pressing claw assembly and the second pressing claw assembly are respectively connected to the mounting bracket via a second buffer assembly so as to be able to float up and down; The lifting drive mechanism is configured to drive the first claw assembly, the second claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend when the first claw assembly and the second claw assembly are closed, so that the first claw assembly and the second claw assembly extend between two bus bars in the junction box, and the opening and closing drive mechanism is configured to drive the first claw assembly and the second claw assembly to open to both sides to bend the two bus bars; The lifting drive mechanism is also configured to continue to drive the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, so that the first pusher claw assembly and the first pressure claw assembly cooperate to press one of the bent bus bars onto the corresponding conductive sheet, and the second pusher claw assembly and the second pressure claw assembly cooperate to press the other bent bus bar onto the corresponding conductive sheet.

2. The busbar pressing mechanism according to claim 1, characterized in that: The second buffer assembly includes a first cylinder, the first cylinder is mounted on the mounting bracket, and the first pressure claw assembly or the second pressure claw assembly is connected to the lower end of the telescopic rod of the first cylinder; Before the lifting drive mechanism drives the first pusher claw assembly, the second pusher claw assembly, the first pressure claw assembly and the second pressure claw assembly to descend, the first cylinder drives the first pressure claw assembly and the second pressure claw assembly to rise to a high avoidance position to leave space for the first pusher claw assembly and the second pusher claw assembly to close; After the first pusher claw assembly and the second pusher claw assembly bend the two bus bars, the first cylinder drives the first pressing claw assembly or the second pressing claw assembly to descend to a low pressing position, so that the first pressing claw assembly and the second pressing claw assembly enter between the first pusher claw assembly and the second pusher claw assembly; When the first pressing claw assembly and the second pressing claw assembly press the busbar onto the corresponding conductive sheet, the telescopic rod of the corresponding first cylinder is compressed and retracted.

3. The busbar pressing mechanism according to claim 2, characterized in that: The first cylinder is connected to a compressed air source via a first air supply system; The first air supply system includes an air intake pipeline, an electromagnetic reversing valve, a first pressure reducing valve, a first pipeline and a second pipeline, wherein: One end of the air intake pipeline is connected to the compressed air source, and the other end of the air intake pipeline is connected to the electromagnetic reversing valve; One end of the first pipeline is connected to the electromagnetic reversing valve, and the other end of the first pipeline is communicated with the rodless chamber of the first cylinder; one end of the second pipeline is connected to the electromagnetic reversing valve, and the other end of the second pipeline is communicated with the rod chamber of the first cylinder; the electromagnetic reversing valve is used to control the communication between the intake pipeline and the first pipeline or the second pipeline; The first pressure reducing valve is arranged on the first pipeline or the air intake pipeline; When the electromagnetic reversing valve controls the air intake pipeline to be connected with the first pipeline, the compressed air enters the rodless chamber of the first cylinder through the air intake pipeline and the first pipeline in sequence, and the first pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the first cylinder, so that the telescopic rod of the first cylinder applies a predetermined downward pressure to the first pressure claw assembly or the second pressure claw assembly; When the electromagnetic reversing valve controls the air intake pipeline to be connected with the second pipeline, compressed air enters the rod chamber of the first cylinder through the air intake pipeline and the second pipeline in sequence, so that the telescopic rod of the first cylinder drives the first pressure claw assembly or the second pressure claw assembly to rise.

4. The busbar pressing mechanism according to claim 1, characterized in that: The first buffer assembly includes a second cylinder, the second cylinder is mounted on the driving end of the opening and closing driving mechanism, the first pusher claw assembly or the second pusher claw assembly is connected to the lower end of the telescopic rod of the second cylinder, and when the first pusher claw assembly or the second pusher claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder is compressed and retracted; Alternatively, the first buffer assembly comprises a guide rod and a spring, wherein: The guide rod is mounted on the driving end of the opening and closing driving mechanism in the vertical direction; The first pusher claw assembly or the second pusher claw assembly is installed on the guide rod, and the guide rod guides the first pusher claw assembly or the second pusher claw assembly to float up and down; the spring is sleeved on the guide rod, and the spring applies downward pressure to the first pusher claw assembly or the second pusher claw assembly; when the first pusher claw assembly or the second pusher claw assembly presses the bus bar onto the corresponding conductive sheet, the first pusher claw assembly or the second pusher claw assembly moves up, and the spring contracts under pressure.

5. The busbar pressing mechanism according to claim 4, characterized in that: The second cylinder is connected to a compressed air source via a second air supply system; The second gas supply system comprises a third pipeline and a second pressure reducing valve, wherein: One end of the third pipeline is connected to the compressed air source, and the other end of the third pipeline is connected to the rodless chamber of the second cylinder; the rod chamber of the second cylinder is connected to the atmosphere; The second pressure reducing valve is arranged on the third pipeline; The compressed air source is used to provide compressed air to the rodless chamber of the second cylinder, and the second pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the second cylinder, so that the telescopic rod of the second cylinder applies a predetermined downward pressure to the first and second pusher claw assemblies.

6. The busbar pressing mechanism according to claim 2, characterized in that: The second pressure claw assembly has the same structure as the first pressure claw assembly, the first pressure claw assembly includes an adapter plate and a pressure claw, wherein the adapter plate is connected to the lower end of the telescopic rod of the first cylinder, and the pressure claw is installed on the adapter plate; the first pressure claw assembly also includes a vertical plate, the vertical plate is fixedly connected to the adapter plate, the vertical plate is provided with a first stop bolt extending in a vertical direction, and the first cylinder is provided with a stop block located below the first stop bolt; When the first cylinder drives the first pressing claw assembly to descend to the clamping low position, the lower end of the first stopping bolt is pressed against the stopping block.

7. The busbar pressing mechanism according to claim 1, characterized in that: The first pressing jaw assembly and the second pressing jaw assembly are also provided with air blowing blocks respectively, and the air blowing blocks are configured to blow air to the welding position of the busbar during the busbar welding process.

8. The busbar pressing mechanism according to claim 1, characterized in that: The second claw assembly has the same structure as the first claw assembly, the first claw assembly comprises a sensing plate and a claw, wherein the sensing plate is connected to the movable part of the first buffer assembly, and the claw is mounted on the sensing plate; The busbar pressing mechanism further comprises a sensor matched with the sensor plate and arranged on a fixing component of the first buffer assembly or the mounting bracket, wherein the sensor is used to measure the rising stroke of the first pusher claw assembly.

9. A busbar pressing mechanism, characterized in that: The busbar clamping mechanism is used to clamp two pre-bent busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. The busbar clamping mechanism includes a lifting drive mechanism, a mounting bracket, an opening and closing drive mechanism, a first pusher claw assembly, a second pusher claw assembly, a first pressure claw assembly, a second pressure claw assembly, two first buffer assemblies and two second buffer assemblies, wherein: The mounting bracket is connected to the movable component of the lifting drive mechanism; The opening and closing driving mechanism is mounted on the mounting bracket, the first pusher claw assembly and the second pusher claw assembly are respectively connected to the driving end of the opening and closing driving mechanism via the first buffer assembly 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 assembly and the second pusher claw assembly to close or open; The first pressing claw assembly and the second pressing claw assembly are respectively connected to the mounting bracket via a second buffer assembly so as to be able to float up and down; The lifting drive mechanism is configured to drive the first claw assembly, the second claw assembly, the first pressing claw assembly and the second pressing claw assembly to descend when the first claw assembly and the second claw assembly are closed, so that the first claw assembly and the first pressing claw assembly cooperate to press a pre-bent bus bar on the battery string assembly onto the corresponding conductive sheet, and the second claw assembly and the second pressing claw assembly cooperate to press another pre-bent bus bar onto the corresponding conductive sheet; The opening and closing driving mechanism is configured to drive the first pusher claw assembly and the second pusher claw assembly to open to both sides to smooth out the two compressed bus bars.

10. The busbar pressing mechanism according to claim 9, characterized in that: The second buffer assembly includes a first cylinder, the first cylinder is mounted on the mounting bracket, the first pressing claw assembly or the second pressing claw assembly is connected to the lower end of the telescopic rod of the first cylinder, and when the first pressing claw assembly or the second pressing claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the first cylinder is compressed and retracted; Alternatively, the second buffer assembly includes a first guide rod and a first spring, wherein: The first guide rod is mounted on the mounting bracket along a vertical direction; The first pressing claw assembly or the second pressing claw assembly is installed on the first guide rod, and the first guide rod guides the first pressing claw assembly or the second pressing claw assembly to float up and down, and the first spring is sleeved on the first guide rod, and the first spring applies downward pressure to the first pressing claw assembly or the second pressing claw assembly; When the first pressing claw assembly or the second pressing claw assembly presses the bus bar onto the corresponding conductive sheet, the first pressing claw assembly or the second pressing claw assembly moves upward, and the first spring contracts under pressure.

11. The busbar pressing mechanism according to claim 10, characterized in that: The first cylinder is connected to a compressed air source via a first air supply system; The first gas supply system comprises a fourth pipeline and a third pressure reducing valve, wherein: One end of the fourth pipeline is connected to the compressed air source, and the other end of the fourth pipeline is connected to the rodless chamber of the first cylinder; the rod chamber of the first cylinder is connected to the atmosphere; The third pressure reducing valve is arranged on the fourth pipeline; The compressed air source is used to provide compressed air to the rodless chamber of the first cylinder, and the third pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the first cylinder, so that the telescopic rod of the first cylinder applies a predetermined downward pressure to the first pressure claw assembly and the second pressure claw assembly.

12. The busbar pressing mechanism according to claim 9, characterized in that: The first buffer assembly includes a second cylinder, which is mounted on the driving end of the opening and closing driving mechanism. When the first pusher claw assembly or the second pusher claw assembly presses the bus bar onto the corresponding conductive sheet, the telescopic rod of the second cylinder is compressed and retracted; Alternatively, the first buffer assembly comprises a second guide rod and a second spring, wherein: The second guide rod is mounted on the driving end of the opening and closing driving mechanism along the vertical direction; The first pusher claw assembly or the second pusher claw assembly is installed on the second guide rod, the second guide rod is used to guide the first pusher claw assembly or the second pusher claw assembly to float up and down, the second spring is sleeved on the second guide rod, and the second spring applies downward pressure to the first pusher claw assembly or the second pusher claw assembly; When the first pusher claw assembly or the second pusher claw assembly presses the bus bar onto the corresponding conductive sheet, the first pusher claw assembly or the second pusher claw assembly moves upward, and the second spring contracts under pressure.

13. The busbar pressing mechanism according to claim 12, characterized in that: The second cylinder is connected to a compressed air source via a second air supply system; The second gas supply system comprises a fifth pipeline and a fourth pressure reducing valve, wherein: One end of the fifth pipeline is connected to the compressed air source, and the other end of the fifth pipeline is connected to the rodless chamber of the second cylinder; the rod chamber of the second cylinder is connected to the atmosphere; The fourth pressure reducing valve is arranged on the fifth pipeline; The compressed air source is used to provide compressed air to the rodless chamber of the second cylinder, and the fourth pressure reducing valve is used to adjust the pressure of the compressed air entering the rodless chamber of the second cylinder, so that the telescopic rod of the second cylinder applies a predetermined downward pressure to the first and second pusher claw assemblies.

14. The busbar pressing mechanism according to claim 9, characterized in that: The second pressing claw assembly has the same structure as the first pressing claw assembly, the first pressing claw assembly comprises an adapter plate and a pressing claw, wherein the adapter plate is connected to the movable part of the second buffer assembly, and the pressing claw is mounted on the adapter plate; The adapter plate is also provided with a blowing block, and the blowing block is configured to blow air to the welding position of the busbar during the busbar welding process.

15. The busbar pressing mechanism according to claim 9, characterized in that: The second claw assembly has the same structure as the first claw assembly, the first claw assembly comprises a sensing plate and a claw, wherein the sensing plate is connected to the movable part of the first buffer assembly, and the claw is mounted on the sensing plate; The busbar pressing mechanism further comprises a sensor matched with the sensor plate and arranged on a fixing component of the first buffer assembly or the mounting bracket, wherein the sensor is used to measure the rising stroke of the first pusher claw assembly.

16. The busbar pressing mechanism according to claim 9, characterized in that: A stop bolt extending in a horizontal direction is provided on the fixing component of the first buffer assembly corresponding to the first pusher claw assembly, and a stop plate is provided on the fixing component of the first buffer assembly corresponding to the second pusher claw assembly; When the opening and closing driving mechanism drives the first pusher claw assembly and the second pusher claw assembly to close, the end of the stop bolt is pressed against the stop plate.

17. 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 16, 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 to press two busbars on the battery string assembly onto two conductive sheets in the junction box in a one-to-one correspondence. The welding device is configured to be movable above the welding station, and welds the two compressed bus bars to the corresponding conductive sheets by means of a laser beam.

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