Stack bundling device

Abstract

The present invention relates to the field of metal part processing, and discloses an electric stack bundling device. The electric stack bundling device includes: a workbench including a bearing table board; a pressing mechanism capable of pressing on the top surface of the electric stack; a bottom bending mechanism including a first bending component and a second bending component capable of lifting relative to the bearing table board. The first bending component and the second bending component both include a bending rod, a bending roller and a clamping member. The bending roller rises from the bearing table board so that the binding band is bent at the first bottom corner and the second bottom corner to form corresponding first bending parts and second bending parts, and the clamping member can clamp the binding band; a top bending mechanism for bending the binding band at the first top corner and the second top corner to form corresponding third bending parts and fourth bending parts, and enabling two opposite ends of the binding band to overlap to form an overlapping structure; a welding mechanism for welding the overlapping structure. The electric stack bundling device of the present invention improves the welding firmness of the electric stack bundling.

Description

Technical Field

[0001] The present invention relates to the field of metal part processing, and particularly relates to a stack bundling device. Background Art

[0002] The stack of a hydrogen fuel cell is a device that directly generates electrical energy through an electrochemical reaction of fuel. The stack is assembled from an upper end plate, a lower end plate, springs, spring covers, and multiple fuel cell monomers, etc. The multiple fuel cell monomers are stacked between the upper end plate and the lower end plate.

[0003] During the production and processing of hydrogen fuel cells, it is necessary to use straps to bundle the stack. After the strap is wound around the stack for one circle, the two ends of the strap are welded to each other. However, in the prior art, when the strap is wound around the stack for one circle, the two ends of the strap often cannot be aligned and overlapped. Summary of the Invention

[0004] The present invention provides a stack bundling device, which improves the alignment degree of the overlapping lap joint of the two ends of the strap after bundling the stack, thereby improving the firmness of the bundling.

[0005] The present invention provides a stack bundling device for bundling a stack located at a bundling station through a strap. The stack has opposite top and bottom surfaces and opposite first and second side surfaces. The stack includes a first bottom corner between the first side surface and the bottom surface, a second bottom corner between the second side surface and the bottom surface, a first top corner between the first side surface and the top surface, and a second top corner between the second side surface and the top surface. The stack bundling device includes: a workbench, including a bearing table board, the bearing table board can bear the stack and the strap located at the bundling station, the strap is located at the bottom of the stack and extends out of the first side surface and the second side surface; a pressing mechanism, installed on the workbench, the pressing mechanism can press the top surface of the stack; a bottom bending mechanism, including a first bending component and a second bending component that can move up and down relative to the bearing table board, the first bending component is located on the side where the first side surface of the stack is located, the second bending component is located on the side where the second side surface of the stack is located, the first bending component and the second bending component both include a bending rod, a bending roller, and a clamping member, the bending roller and the clamping member are installed on the side of the bending rod facing the stack, the bending roller is located above the clamping member, the bending roller can contact the strap, the bending roller rises from the bearing table board to bend the strap at the first bottom corner and the second bottom corner to form corresponding first bending parts and second bending parts, and the clamping member can clamp the strap; a top bending mechanism, installed on the workbench, for bending the strap at the first top corner and the second top corner to form corresponding third bending parts and fourth bending parts, and making the two opposite ends of the strap overlap to form an overlapping structure; a welding mechanism, installed on the workbench, for welding the overlapping structure.

[0006] Optionally, the clamping member includes two clamping jaws arranged opposite to each other, and the first bending assembly and the second bending assembly both include a clamping driving member arranged on the bending rod, the clamping driving member is connected to the two clamping jaws, and the clamping driving member can drive the two clamping jaws to move closer to or away from each other.

[0007] Optionally, of the two clamping jaws, at least one clamping jaw has a first chamfered structure on its top facing the battery stack.

[0008] Optionally, the bottom bending mechanism also includes a lifting assembly, a lifting frame and a lifting drive assembly. The lifting assembly is arranged under the supporting platform. The lifting assembly has a guide part and a lifting part that can move up and down relative to the guide part. The lifting drive assembly is connected to the lifting part in a transmission manner to drive the lifting part to move up and down. The bending rods of the first bending assembly and the second bending assembly are installed on the lifting frame, and the lifting frame is connected to the lifting part of the lifting assembly.

[0009] Optionally, the lifting assembly includes a first screw assembly, the guide part includes a first screw in the first screw assembly, the lifting part includes a first screw nut in the first screw assembly, the lifting drive assembly includes a first motor, a first reducer, a first synchronous wheel, a first synchronous belt and a second synchronous wheel that are sequentially connected in transmission, the second synchronous wheel is coaxially connected to the first screw, and the first motor drives the first screw to rotate so that the first screw nut reciprocates along the axial direction of the first screw.

[0010] Optionally, the pressure-applying mechanism is located above the battery stack, and there are two top bending mechanisms, which are relatively arranged on opposite sides of the pressure-applying mechanism. Each top bending mechanism includes a translation drive, a translation plate and a bending head. The translation drive is fixed relative to the workbench, and the translation drive is transmission-connected to the translation plate so that the translation drive can drive the translation plate to move in a direction parallel to the top surface of the battery stack. The bending head is fixedly connected to the translation plate and extends out of the translation plate. The bending head is block-shaped, and the bending heads of the two top bending mechanisms are translated toward each other from the outside of the battery stack so that the straps are bent at the first vertex corner and the second vertex corner to form corresponding third bending portions and fourth bending portions.

[0011] Optionally, after the pressure-applying mechanism applies pressure to the top surface of the battery stack, a vertical distance between a bottom surface of the bending head and the top surface of the battery stack is equal to a thickness of the binding band.

[0012] Optionally, each top bending mechanism also includes a reciprocating drive, a reciprocating plate and a guide assembly. The reciprocating drive can drive the reciprocating plate to move in a direction parallel to the moving direction of the translation plate. The guide assembly is fixedly connected to the reciprocating plate and extends out of the reciprocating plate. The guide assembly includes a first guide plate and a second guide plate parallel to each other. The first guide plate and the second guide plate are arranged on opposite sides of the corresponding bending head. The first guide plate and the second guide plate can accommodate a strap.

[0013] Optionally, the distance between the first guiding plate and the second guiding plate in each guiding component is the width of the binding strap plus 0.1 mm to 0.3 mm.

[0014] Optionally, the bottom surface of the bending head of the bending head is located between the first guiding plate and the second guiding plate, and the vertical distance between the bottom surface of the bending head of the bending head and the bottom surface of the first guiding plate of the first guiding plate, and the vertical distance between the bottom surface of the bending head of the bending head and the bottom surface of the second guiding plate of the second guiding plate are equal to the thickness of the binding strap.

[0015] Optionally, the surfaces of the first guiding plate facing the second guiding plate and the second guiding plate facing the first guiding plate respectively have second chamfer structures at the ends far from the reciprocating plate.

[0016] Optionally, the bearing table plate is provided with a plurality of card slots arranged side by side, each card slot can accommodate a binding strap, and each card slot is provided with a through hole for the first bending component and the second bending component to pass through.

[0017] According to the stack bundling device of the present invention, the bottom bending mechanism includes a first bending component and a second bending component that can be lifted relative to the bearing table plate. The first bending component and the second bending component both include a bending rod, a bending roller and a clamping member. The bending roller and the clamping member are installed on the side of the bending rod facing the stack. The bending roller is located above the clamping member. The bending roller can contact the binding strap. When the first bending component and the second bending component rise, the bending roller rises from the bearing table plate. The bending roller presses the binding strap at the first bottom angle and the second bottom angle, so that the binding strap is bent at the first bottom angle and the second bottom angle to form corresponding first bending parts and second bending parts. After the binding strap forms the first bending parts and the second bending parts, the clamping member located below the bending roller can clamp the binding strap, so that the subsequent deformation process of the binding strap is always carried out under the clamping and limiting of the clamping member, reducing the left and right swing of the binding strap during the bending process. After the binding strap winds around the stack for a full circle, the alignment degree of the overlapping lap joints of the two ends of the binding strap is higher, improving the aesthetics of the binding strap after bundling the stack and also improving the welding firmness of bundling the stack. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic diagram of the principle of the pressing stage of bundling a stack located at the bundling station by a binding strap in an embodiment of the stack bundling device of the present invention;

[0020] Figure 2 Schematic diagram before the bottom bending stage of bundling the stack located at the bundling station by a strap in an embodiment of the stack bundling device of the present invention;

[0021] Figure 3 Schematic diagram after the bottom bending stage of bundling the stack located at the bundling station by a strap in an embodiment of the stack bundling device of the present invention;

[0022] Figure 4 Schematic diagram during the top bending stage of bundling the stack located at the bundling station by a strap in an embodiment of the stack bundling device of the present invention;

[0023] Figure 5 Schematic diagram after the top bending stage of bundling the stack located at the bundling station by a strap in an embodiment of the stack bundling device of the present invention;

[0024] Figure 6 Schematic diagram of the welding stage of bundling the stack located at the bundling station by a strap in an embodiment of the stack bundling device of the present invention;

[0025] Figure 7 Stereoscopic diagram of an embodiment of the stack bundling device of the present invention;

[0026] Figure 8 Stereoscopic diagram of the bottom bending mechanism in an embodiment of the stack bundling device of the present invention;

[0027] Figure 9 Stereoscopic diagram of the first bending assembly in an embodiment of the stack bundling device of the present invention;

[0028] Figure 10 Stereoscopic exploded view of the first bending assembly in an embodiment of the stack bundling device of the present invention;

[0029] Figure 11 Partial stereoscopic diagram of a time point in the bending process of the strap by the bottom bending mechanism in an embodiment of the stack bundling device of the present invention;

[0030] Figure 12 Partial stereoscopic diagram of another time point in the bending process of the strap by the bottom bending mechanism in an embodiment of the stack bundling device of the present invention;

[0031] Figure 13 Stereoscopic diagram of the top bending mechanism in an embodiment of the stack bundling device of the present invention;

[0032] Figure 14 Partial stereoscopic diagram after the top bending of the strap is completed in an embodiment of the stack bundling device of the present invention;

[0033] Figure 15This is a schematic cross-sectional view of the bending head and the guiding component in an embodiment of the stack bundling device of the present invention.

[0034] Explanation of reference numerals:

[0035] 100 - Workbench; 110 - Carrying table board; 111 - Card slot; 1111 - Through hole;

[0036] 200 - Pressing mechanism;

[0037] 300 - Bottom bending mechanism; 310a - First bending component; 310b - Second bending component; 311 - Bending rod; 312 - Bending roller; 313 - Clamping piece; 3131 - First chamfer structure; 314 - Clamping driving piece; 320 - Lifting component; 321 - Guiding part; 322 - Lifting part; 330 - Lifting frame; 340 - Lifting driving component; 341 - First motor; 342 - First speed reducer; 343 - First synchronous pulley; 344 - First synchronous belt; 345 - Second synchronous pulley;

[0038] 400 - Top bending mechanism; 410 - Translational driving piece; 420 - Translational plate; 430 - Bending head; 431 - Bottom surface of the bending head; 440 - Reciprocating driving piece; 450 - Reciprocating plate; 460 - Guiding component; 461 - First guiding plate; 4611 - Bottom surface of the first guiding plate; 462 - Second guiding plate; 4621 - Bottom surface of the second guiding plate; 463 - Second chamfer structure;

[0039] 500 - Welding mechanism;

[0040] 800 - Binding strap; 810 - First bending part; 820 - Second bending part; 830 - Third bending part; 840 - Fourth bending part; 850 - Overlapping structure;

[0041] 900 - Stack; 910 - Top surface; 920 - Bottom surface; 930 - First side surface; 940 - Second side surface; R1 - First bottom corner; R2 - Second bottom corner; R3 - First top corner; R4 - Second top corner.

[0042] The realization, functional characteristics, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0046] An embodiment of the present invention provides a stack bundling device, which is used to bundle a stack located at a bundling station through a strap. The stack is a stack of a hydrogen fuel cell, and the strap can be a metal strap, such as a steel strap. Figures 1 to 6 It is a schematic diagram of the principle of each stage of bundling a stack located at a bundling station through a strap in an embodiment of the stack bundling device of the present invention.

[0047] As Figures 1 to 6 , the stack 900 has opposite top surface 910, bottom surface 920, and opposite first side surface 930, second side surface 940. The stack 900 includes a first bottom corner R1 between the first side surface 930 and the bottom surface 920, a second bottom corner R2 between the second side surface 940 and the bottom surface 920, a first top corner R3 between the first side surface 930 and the top surface 910, and a second top corner R4 between the second side surface 940 and the top surface 910.

[0048] As Figure 1 , in the pressing stage, the stack bundling device slowly presses downward on the top surface 910 of the stack 900 through a pressing mechanism. When the pressure reaches a preset pressure, the pressing mechanism stops the downward pressing action and maintains the pressure on the stack 900. As Figure 2 and Figure 3 , then, the bottom bending stage is carried out. Before the bottom bending, the strap 800 is located at the bottom of the stack 900 and extends out of the first side surface 930 and the second side surface 940. When the bottom bending is carried out, the stack bundling device acts on the strap 800 through a bottom bending mechanism, so that the strap 800 is bent at the first bottom corner R1 and the second bottom corner R2 to form corresponding first bending portions 810 and second bending portions 820. Then, as Figure 4 and Figure 5, enter the top bending stage. The stack bundling device acts on the strap 800 through the top bending mechanism, bends at one of the first apex angle R3 and the second apex angle R4, and then bends at the other of the first apex angle R3 and the second apex angle R4, so that the strap 800 bends at the first apex angle R3 and the second apex angle R4 to form corresponding third bending parts 830 and fourth bending parts 840, and makes the two opposite ends of the strap 800 overlap to form an overlapping structure 850. Then, as Figure 6 , the stack bundling device welds the overlapping structure 850 through the welding mechanism. In this way, after the strap 800 wraps around the stack 900 for a full circle, the welding of the strap 800 is completed.

[0049] As Figure 7 , the stack bundling device may include a workbench 100, a pressing mechanism 200, a bottom bending mechanism 300, a top bending mechanism 400, and a welding mechanism 500.

[0050] The workbench 100 includes a bearing table board 110, and the bearing table board 110 can bear the stack 900 and the strap 800 located at the bundling station. When the bearing table board 110 bears the stack 900 and the strap 800 to be processed, the strap 800 is located at the bottom of the stack 900 and extends out of the first side surface 930 and the second side surface 940. The pressing mechanism 200 is installed on the workbench 100, and the pressing mechanism 200 can press on the top surface 910 of the stack 900.

[0051] As Figure 8 , Figure 8 is a three-dimensional schematic diagram of the bottom bending mechanism in an embodiment of the stack bundling device of the present invention. The bottom bending mechanism 300 includes a first bending component 310a and a second bending component 310b that can be lifted relative to the bearing table board 110. The first bending component 310a is located on the side where the first side surface 930 of the stack 900 is located, and the second bending component 310b is located on the side where the second side surface 940 of the stack 900 is located.

[0052] As Figure 9 and Figure 10 , both the first bending component 310a and the second bending component 310b include a bending rod 311, a bending roller 312, and a clamping member 313. The bending roller 312 and the clamping member 313 are installed on the side of the bending rod 311 facing the stack 900, and the bending roller 312 is located above the clamping member 313. The bending roller 312 can contact the strap 800, and the bending roller 312 rises from the bearing table board 110 to bend the strap 800 at the first bottom angle R1 and the second bottom angle R2 to form corresponding first bending parts 810 and second bending parts 820, and the clamping member 313 can clamp the strap 800.

[0053] The top bending mechanism 400 is installed on the workbench 100. The top bending mechanism 400 is used to bend the strap 800 at the first vertex angle R3 and the second vertex angle R4 to form corresponding third bending parts 830 and fourth bending parts 840, and make two opposite ends of the strap 800 overlap to form an overlapping structure 850. The welding mechanism 500 is installed on the workbench 100. The welding mechanism 500 is used to weld the overlapping structure 850.

[0054] According to the stack bundling device of the present invention, the bottom bending mechanism 300 includes a first bending component 310a and a second bending component 310b that can move up and down relative to the bearing platen 110. Both the first bending component 310a and the second bending component 310b include a bending rod 311, a bending roller 312, and a clamping member 313. The bending roller 312 and the clamping member 313 are installed on one side of the bending rod 311 facing the stack 900. The bending roller 312 is located above the clamping member 313. The bending roller 312 can contact the strap 800. When the first bending component 310a and the second bending component 310b rise, the bending roller 312 rises from the bearing platen 110. The bending roller 312 presses the strap 800 at the first bottom angle R1 and the second bottom angle R2, so that the strap 800 is bent at the first bottom angle R1 and the second bottom angle R2 to form corresponding first bending parts 810 and second bending parts 820. After the strap 800 forms the first bending parts 810 and the second bending parts 820, the clamping member 313 located below the bending roller 312 can clamp the strap 800, so that the subsequent deformation process of the strap 800 is always carried out under the clamping and limiting of the clamping member 313, reducing the left and right swing of the strap 800 during the bending process. After the strap 800 goes around the stack 900 for a whole week, the alignment of the overlapping lap joints of the two ends of the strap 800 is higher, improving the aesthetics of the strap 800 after bundling the stack 900 and also improving the welding firmness of bundling the stack 900.

[0055] As Figure 11 and Figure 12 , a plurality of card slots 111 arranged side by side are provided on the bearing platen 110. Each card slot 111 can accommodate a strap 800. Each card slot 111 is provided with a through hole 1111 for the first bending component 310a and the second bending component 310b to pass through, so as to facilitate the first bending component 310a and the second bending component 310b to rise from the bottom of the bearing platen 110, and further facilitate the first bending component 310a and the second bending component 310b to act on the strap 800, so that the strap 800 is bent at the first bottom angle R1 and the second bottom angle R2 to form corresponding first bending parts 810 and second bending parts 820.

[0056] As Figure 9 and Figure 10In some embodiments, the clamping member 313 includes two clamping jaws arranged opposite to each other, and the first bending assembly 310a and the second bending assembly 310b both include a clamping driving member 314 arranged on the bending rod 311. The clamping driving member 314 is, for example, a clamping cylinder. The clamping driving member 314 is connected to the two clamping jaws, and the clamping driving member 314 can drive the two clamping jaws to move closer to or away from each other, thereby achieving stable clamping of the strap 800.

[0057] In some embodiments, at least one of the two clamping jaws has a first chamfered structure 3131 on the top of the surface facing the battery stack 900. When the bending roller 312 rises from the supporting platform 110 and is about to contact the strap 800, the first chamfered structure 3131 can play a guiding role, so that the strap 800 is correctly and smoothly introduced between the two clamping jaws, thereby improving the smoothness of the strap 800 forming the first bending portion 810 and the second bending portion 820.

[0058] like Figure 8 In some embodiments, the bottom bending mechanism 300 further includes a lifting assembly 320, a lifting frame 330 and a lifting drive assembly 340. The lifting assembly 320 is disposed below the supporting platform 110. The lifting assembly 320 has a guide portion 321 and a lifting portion 322 that can be lifted and lowered relative to the guide portion 321. The lifting drive assembly 340 is transmission-connected to the lifting portion 322 to drive the lifting portion 322 to lift and lower. The bending rod 311 of the first bending assembly 310a and the second bending assembly 310b is installed on the lifting frame 330. The lifting frame 330 is connected to the lifting portion 322 of the lifting assembly 320.

[0059] In some embodiments, the lifting assembly 320 includes a first screw assembly, the guide portion 321 includes a first screw in the first screw assembly, the lifting portion 322 includes a first screw nut in the first screw assembly, and the lifting drive assembly 340 includes a first motor 341, a first reducer 342, a first synchronous wheel 343, a first synchronous belt 344 and a second synchronous wheel 345 that are sequentially connected in transmission, the second synchronous wheel 345 is coaxially connected to the first screw, and the first motor 341 drives the first screw to rotate so that the first screw nut reciprocates along the axial direction of the first screw.

[0060] like Figure 7 In some embodiments, the pressure-applying mechanism 200 is located above the battery stack 900 , and the number of the top bending mechanisms 400 is two, and the two top bending mechanisms 400 are relatively arranged on opposite sides of the pressure-applying mechanism 200 .

[0061] like Figure 13, each top bending mechanism 400 includes a translation driving member 410, a translation plate 420, and a bending head 430. The translation driving member 410 is fixed relative to the workbench 100. The translation driving member 410 is in transmission connection with the translation plate 420, so that the translation driving member 410 can drive the translation plate 420 to move along a direction parallel to the top surface 910 of the fuel cell stack 900. The bending head 430 is fixedly connected to the translation plate 420 and protrudes from the translation plate 420. The bending head 430 is in a block shape. The bending heads 430 of the two top bending mechanisms 400 translate towards each other from the outside of the fuel cell stack 900, so that the binding band 800 is bent at the first apex angle R3 and the second apex angle R4 to form corresponding third bending portions 830 and fourth bending portions 840.

[0062] In some embodiments, after the pressing mechanism 200 presses on the top surface 910 of the fuel cell stack 900, the vertical distance between the bottom surface 431 of the bending head 430 of the bending head 430 and the top surface 910 of the fuel cell stack 900 is equal to the thickness of the binding band 800. When the bending head 430 translates to bend the binding band 800 at the first apex angle R3 and the second apex angle R4 to form corresponding third bending portions 830 and fourth bending portions 840, since the vertical distance between the bottom surface 431 of the bending head 430 of the bending head 430 and the top surface 910 of the fuel cell stack 900 is equal to the thickness of the binding band 800, it can be ensured that the binding band 800 is in close contact with the fuel cell stack 900 at the third bending portion 830, the fourth bending portion 840, and the top surface 910 of the fuel cell stack 900, thus facilitating meeting the bundling requirements.

[0063] In some embodiments, each top bending mechanism 400 further includes a reciprocating driving member 440, a reciprocating plate 450, and a guiding component 460. The reciprocating driving member 440 can drive the reciprocating plate 450 to move along a direction parallel to the moving direction of the translation plate 420. The guiding component 460 is fixedly connected to the reciprocating plate 450 and protrudes from the reciprocating plate 450. The guiding component 460 includes a first guiding plate 461 and a second guiding plate 462 that are parallel to each other. The first guiding plate 461 and the second guiding plate 462 are respectively arranged on opposite sides of the corresponding bending head 430, and the binding band 800 can be accommodated between the first guiding plate 461 and the second guiding plate 462.

[0064] As Figure 14, when the third bending part 830 and the fourth bending part 840 are to be formed, first, the reciprocating driving parts 440 of the two top bending mechanisms 400 drive the alignment component 460 to translate towards each other, so that the alignment component 460 extends towards the top surface 910 of the stack 900. When the strap 800 is pushed and bent by the bending head 430, the bent strap 800 can be limited between the first alignment plate 461 and the second alignment plate 462, realizing that the bending direction of the strap 800 at the first apex angle R3 and the second apex angle R4 is parallel to the advancing direction of the bending head 430, and further reducing the left - right swing of the strap 800 during the bending process. After the strap 800 wraps around the stack 900 for a full circle, the alignment degree of the overlapping lap joints of the two ends of the strap 800 is further improved, thereby further improving the aesthetics of the strap 800 after bundling the stack 900, and also further improving the welding firmness of bundling the stack 900.

[0065] As Figure 15 , in some embodiments, the distance between the first alignment plate 461 and the second alignment plate 462 in each alignment component 460 is the width of the strap 800 plus 0.1 mm to 0.3 mm. For example, in this embodiment, the distance between the first alignment plate 461 and the second alignment plate 462 in each alignment component 460 is the width of the strap 800 plus 0.2 mm. By setting the distance between the first alignment plate 461 and the second alignment plate 462 in each alignment component 460 to be the width of the strap 800 plus 0.1 mm to 0.3 mm, it is ensured that the limitation of the alignment component 460 on the strap 800 is within a reasonable range, and the alignment degree of the overlapping lap joints of the two ends of the strap 800 is ensured.

[0066] In some embodiments, the bottom surface 431 of the bending head 430 of the bending head is located between the first alignment plate 461 and the second alignment plate 462, and the vertical distance between the bottom surface 431 of the bending head 430 of the bending head and the bottom surface 4611 of the first alignment plate 461 of the first alignment plate, and the vertical distance between the bottom surface 431 of the bending head 430 of the bending head and the bottom surface 4621 of the second alignment plate 462 of the second alignment plate are equal to the thickness of the strap 800.

[0067] As Figure 14, in some embodiments, the surfaces of the first alignment plate 461 facing the second alignment plate 462 and the surfaces of the second alignment plate 462 facing the first alignment plate 461 respectively have second chamfer structures 463 at the ends far from the reciprocating plate 450. When the third bending portion 830 and the fourth bending portion 840 are to be formed, first, the reciprocating driving members 440 of the two top bending mechanisms 400 drive the alignment assembly 460 to translate towards each other, so that the alignment assembly 460 extends towards the top surface 910 of the fuel cell stack 900. Since the first alignment plate 461 and the second alignment plate 462 have the second chamfer structures 463, the second chamfer structures 463 can guide the binding strap 800 between the first alignment plate 461 and the second alignment plate 462 during the translation of the first alignment plate 461 and the second alignment plate 462, improving the smoothness when the binding strap 800 is limited between the first alignment plate 461 and the second alignment plate 462.

[0068] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electric stack bundling device is used to bundle an electric stack located at a bundling station through a binding band. The electric stack has opposite top and bottom surfaces and opposite first and second side surfaces. The electric stack includes a first bottom corner between the first side surface and the bottom surface, a second bottom corner between the second side surface and the bottom surface, a first top corner between the first side surface and the top surface, and a second top corner between the second side surface and the top surface. It is characterized in that, The fuel cell stack bundling device includes: A workbench, including a bearing platen, which can bear the fuel cell stack and the binding strap located at the bundling station. The binding strap is located at the bottom of the fuel cell stack and extends out of the first side and the second side; A pressing mechanism, installed on the workbench, which can press on the top surface of the fuel cell stack; A bottom bending mechanism, including a first bending component and a second bending component that can move up and down relative to the bearing platen. The first bending component is located on the side where the first side of the fuel cell stack is located, and the second bending component is located on the side where the second side of the fuel cell stack is located. The first bending component and the second bending component both include a bending rod, a bending roller, and a clamping member. The bending roller and the clamping member are installed on the side of the bending rod facing the fuel cell stack. The bending roller is located above the clamping member. The bending roller can contact the binding strap. When the bending roller rises from the bearing platen, the binding strap is bent at the first bottom corner and the second bottom corner to form corresponding first bending parts and second bending parts. The clamping member can clamp the binding strap; A top bending mechanism, installed on the workbench, for bending the binding strap at the first top corner and the second top corner to form corresponding third bending parts and fourth bending parts, and making the two opposite ends of the binding strap overlap to form an overlapping structure; A welding mechanism, installed on the workbench, for welding the overlapping structure; The pressing mechanism is located above the fuel cell stack. The number of the top bending mechanisms is two. The two top bending mechanisms are relatively arranged on the opposite sides of the pressing mechanism. Each top bending mechanism includes a translation driving member, a translation plate, and a bending head. The translation driving member is fixed relative to the workbench. The translation driving member is in transmission connection with the translation plate, so that the translation driving member can drive the translation plate to move in a direction parallel to the top surface of the fuel cell stack. The bending head is fixedly connected to the translation plate and extends out of the translation plate; Each top bending mechanism further includes a reciprocating driving member, a reciprocating plate, and a guiding component. The reciprocating driving member can drive the reciprocating plate to move in a direction parallel to the moving direction of the translation plate. The guiding component is fixedly connected to the reciprocating plate and extends out of the reciprocating plate. The guiding component includes a first guiding plate and a second guiding plate that are parallel to each other. The first guiding plate and the second guiding plate are respectively arranged on the opposite sides of the corresponding bending head. The binding strap can be accommodated between the first guiding plate and the second guiding plate.

2. The stack bundling device according to claim 1, wherein The clamping member includes two relatively arranged clamping jaws. The first bending component and the second bending component both include a clamping driving member arranged on the bending rod. The clamping driving member is connected to the two clamping jaws. The clamping driving member can drive the two clamping jaws to approach or separate from each other.

3. The stack bundling device according to claim 2, wherein, Among the two clamping jaws, at least one of the surfaces of the clamping jaw facing the fuel cell stack has a first chamfer structure.

4. The stack bundling device according to claim 1, characterized in that, The bottom bending mechanism also includes a lifting assembly, a lifting frame and a lifting drive assembly. The lifting assembly is arranged below the supporting platform. The lifting assembly has a guide portion and a lifting portion that can move up and down relative to the guide portion. The lifting drive assembly is connected to the lifting portion in a transmission manner to drive the lifting portion to move up and down. The bending rods of the first bending assembly and the second bending assembly are installed on the lifting frame, and the lifting frame is connected to the lifting portion of the lifting assembly.

5. The stack bundling device according to claim 4, wherein, The lifting assembly includes a first screw assembly, the guide portion includes a first screw in the first screw assembly, the lifting portion includes a first screw nut in the first screw assembly, the lifting drive assembly includes a first motor, a first reducer, a first synchronous wheel, a first synchronous belt and a second synchronous wheel that are sequentially connected in transmission, the second synchronous wheel is coaxially connected to the first screw, and the first motor drives the first screw to rotate so that the first screw nut reciprocates along the axial direction of the first screw.

6. The stack bundling device according to claim 1, wherein The bending head is block-shaped, and the bending heads of the two top bending mechanisms are translated toward each other from the outside of the battery stack so that the binding strap is bent at the first vertex angle and the second vertex angle to form the corresponding third bending portion and the fourth bending portion.

7. The stack bundling device according to claim 6, characterized in that, After the pressure mechanism applies pressure to the top surface of the battery stack, a vertical distance between a bottom surface of the bending head and the top surface of the battery stack is equal to a thickness of the binding band.

8. The stack bundling device according to claim 6, characterized in that, The spacing between the first guide plate and the second guide plate in each of the guide assemblies is the width of the binding band plus 0.1 mm to 0.3 mm.

9. The stack bundling device according to claim 6, characterized in that, The bottom surface of the bending head of the bending head is located between the first guide plate and the second guide plate, and the vertical distance between the bottom surface of the bending head of the bending head and the bottom surface of the first guide plate of the first guide plate, and the vertical distance between the bottom surface of the bending head of the bending head and the bottom surface of the second guide plate of the second guide plate are equal to the thickness of the binding strap.

10. The stack bundling device according to claim 6, characterized in that, A surface of the first guide plate facing the second guide plate and a surface of the second guide plate facing the first guide plate respectively have a second chamfered structure at an end away from the reciprocating plate.

11. The stack bundling device according to claim 1, wherein, The bearing platform is provided with a plurality of slots arranged side by side, each of the slots can accommodate one of the straps, and each of the slots is provided with a through hole for the first bending component and the second bending component to pass through.

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