Bandage lifting mechanism for galvanic pile packaging and galvanic pile packaging device

Abstract

The utility model provides a binding belt lifting mechanism for galvanic pile packaging and a galvanic pile packaging device, and relates to the technical field of galvanic pile packaging equipment of fuel cells, the binding belt lifting mechanism for galvanic pile packaging comprises a lifting mechanism, a mounting seat, a hook assembly and an elastic piece, the mounting base is arranged on the lifting mechanism and can ascend or descend along with the lifting mechanism in the vertical direction, the hook assembly is used for hooking a hanging hole of a bandage, one end of the elastic piece is fixed to the mounting base, the other end of the elastic piece is fixedly connected with the hook assembly, and the elastic piece can stretch out and draw back in the vertical direction. According to the invention, the overall height difference after different galvanic piles are compressed is made up through expansion and contraction of the elastic piece, and the position of the hanging hole does not need to be adjusted for each galvanic pile in the actual packaging operation process, so that the operation complexity of the packaging operation is reduced, and the production efficiency of the packaging operation is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cell stack packaging equipment, and in particular to a strap pulling mechanism and a stack packaging device for fuel cell stack packaging. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy. The operating voltage of a single fuel cell is usually between 0.5 and 1.0 V, and the power of a single cell is in the watt to hundred watt range. Therefore, in practical applications, a certain number of single cells need to be connected in series, and then a reasonable packaging force is applied through the packaging structure to assemble them into a battery stack, thereby increasing the output power to meet application requirements.

[0003] The stack packaging of fuel cells usually requires applying a reasonable packaging load to the end components to ensure reliable sealing of reactants and coolants, effective contact between bipolar plates and membrane electrodes, smooth mass transfer and drainage passages, etc. The reaction area of ​​a single battery cell is as high as several hundred square centimeters. The packaging load needs to be distributed more evenly to avoid poor uniformity, reduced life and component damage caused by stress concentration.

[0004] At present, the main packaging methods for fuel cell stacks are screw packaging and band packaging. Among them, screw packaging is to accurately apply torque to the nut through a torque wrench, and convert the nut torque into downward pressure on the end plate to apply the packaging load; band packaging is to apply the packaging load in a "line / surface loading" manner through a band of a certain width; compared with the "point loading" method of screw packaging, the "line / surface loading" method of band packaging reduces the deformation of the end plate of the stack, and has the advantages of small size and relatively uniform force application. The operating procedures of band packaging include first compressing the stack with a certain pressure, then arranging the band and pulling it, bending the band after it is pulled into place, and finally welding. However, due to the different thicknesses of the bipolar plate sealing strips in the stack, there are certain differences in the overall height of the compressed stack. In the actual packaging process, the position of the hanging hole of the band needs to be adjusted according to the actual height of each stack, resulting in complicated operation and low production efficiency. Utility Model Content

[0005] A technical problem to be solved by the present disclosure is that due to the inconsistent thickness of the bipolar plate sealing strips in the battery stack, there are differences in the overall height of the compressed battery stack, and therefore, in the actual packaging process, the position of the process hanging holes of the binding tape needs to be adjusted, resulting in complicated operation and low production efficiency.

[0006] In order to solve the above technical problems, the present disclosure provides a strap pulling mechanism for battery stack packaging, comprising:

[0007] Lifting mechanism;

[0008] A mounting seat, which is arranged on the lifting mechanism and can rise or fall along the vertical direction with the lifting mechanism;

[0009] A hook assembly, the hook assembly is used to hook the hanging hole of the strap; and

[0010] An elastic member, one end of which is fixed on the mounting seat, and the other end of which is fixedly connected to the hook assembly, and the elastic member is configured to be able to extend and retract in the vertical direction.

[0011] In some embodiments, the hook assembly includes:

[0012] A floating seat, wherein the floating seat has a limiting groove opening downward, the upper end of the elastic member abuts against the groove bottom of the limiting groove, and the lower end of the elastic member abuts against the mounting seat; and

[0013] A strap hook, which is used to hook the hanging hole of the strap, and the strap hook is movably arranged on the floating seat and can approach or move away from the battery stack along a first horizontal direction;

[0014] A limiting mechanism is provided between the floating seat and the mounting seat to only allow the floating seat to rise or fall in the vertical direction.

[0015] In some embodiments, the hook assembly further includes a first driving component disposed on the floating seat, and the first driving component is used to drive the strap hook to approach or move away from the battery stack along a first horizontal direction.

[0016] In some embodiments, the limiting mechanism includes a guide hole disposed on the floating seat and extending in the vertical direction, and a guide column extending in the vertical direction is disposed on the mounting seat, and the guide column is movably connected in the guide hole.

[0017] In some embodiments, a compression and bending assembly is provided on the mounting seat and is located above the hook assembly. The compression and bending assembly is used to compress and bend the strap that is lifted into place by the hook assembly.

[0018] In some embodiments, the compression and bending assembly includes a second driving component, a compression member, a third driving component and a bending member, the second driving component and the third driving component are fixed on the mounting seat in sequence from bottom to top, the second driving component is used to drive the compression member to approach or move away from the battery stack along the first horizontal direction, and can compress the binding belt to the side of the battery stack when the compression member approaches the battery stack;

[0019] The third driving component is used to drive the bending member to approach or move away from the battery stack along the first horizontal direction, and can bend the binding belt when the bending member approaches the battery stack.

[0020] The present disclosure also provides a battery stack packaging device, including a frame, a stack pressing assembly and the above-mentioned strap lifting mechanism;

[0021] The frame is used to place the battery stack. The stack pressing assembly is arranged above the battery stack and is used to compress the battery stack to be packaged. Two strap pulling mechanisms are arranged below the stack pressing assembly and are respectively located on both sides of the battery stack to be packaged.

[0022] In some embodiments, the stack pressing assembly includes a fourth driving component and a pressing head, the fourth driving component is used to drive the pressing head to rise or fall in a vertical direction, and the pressing head can press the battery stack placed on the frame when it falls in a vertical direction.

[0023] In some embodiments, the stacking assembly further comprises a pressing plate, the telescopic end of the fourth driving component is fixedly connected to the upper plate surface of the pressing plate, and the pressing head is fixed to the lower plate surface of the pressing plate;

[0024] The frame is provided with a support column extending in the vertical direction, and the pressing plate is provided with a limiting hole for the support column to pass through. The support column is used to limit the pressing plate so that it can only rise or fall in the vertical direction.

[0025] In some embodiments, the stack packaging device further includes a welding assembly, which is disposed below the stack pressing assembly and is used to weld and fix the straps; and / or

[0026] The stack packaging device also includes a transverse movement module, which is arranged below the stack pressing assembly. The strap pulling mechanism is arranged on the transverse movement module and can move along the second horizontal direction with the transverse movement module.

[0027] Through the above technical solution, the present invention provides an elastic member that can be extended and retracted in the vertical direction between the hook assembly and the mounting base. The extension and retraction of the elastic member can compensate for the overall height difference of different battery stacks after being compressed. Therefore, in the actual packaging operation, there is no need to adjust the hanging hole position for each battery stack, which reduces the operational complexity of the packaging operation and improves the production efficiency of the packaging operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 is a front view of a strap lifting mechanism disclosed in an embodiment of the present disclosure;

[0030] Figure 2 is a side view of a strap lifting mechanism disclosed in an embodiment of the present disclosure;

[0031] Figure 3is a cross-sectional view of a hook assembly disclosed in an embodiment of the present disclosure;

[0032] Figure 4 It is a structural schematic diagram of a battery stack packaging device disclosed in an embodiment of the present disclosure;

[0033] Figure 5 yes Figure 4 Front view of the packaging device of the CEC stack;

[0034] Figure 6 yes Figure 4 Side view of the CEC stack packaging device.

[0035] Description of reference numerals:

[0036] 1. Battery stack; 2. Binding strap; 201. Hanging hole; 10. Frame; 11. Support column; 20. Pressing stack assembly; 21. Fourth driving component; 22. Press head; 23. Pressing plate; 231. Limiting hole; 30. Binding strap lifting mechanism; 31. Lifting mechanism; 32. Mounting seat; 321. Guide column; 33. Hooking hook assembly; 331. Floating seat; 3311. Limiting groove; 3312. Guide hole; 3313. Hooking guide seat; 332. Binding strap hook; 333. First driving component; 34. Elastic component; 40. Pressing and bending assembly; 41. Second driving component; 42. Pressing component; 43. Third driving component; 44. Bending component; 50. Transverse movement module. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0038] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0039] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0040] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements.

[0041] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0042] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0043] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0044] See also Figure 1-3As shown, the first aspect of the present disclosure provides a strap lifting mechanism 30 for battery stack packaging, including a lifting mechanism 31, a mounting seat 32, a hook assembly 33 and an elastic member 34. The mounting seat 32 is arranged on the lifting mechanism 31 and can rise or fall in the vertical direction with the lifting mechanism 31. The hook assembly 33 is used to hook the hanging hole 201 of the strap 2. One end of the elastic member 34 is fixed on the mounting seat 32, and the other end is fixedly connected to the hook assembly 33. The elastic member 34 is configured to be able to extend and retract in the vertical direction.

[0045] In the battery stack packaging operation mentioned in the present disclosure, since the thickness of the bipolar plate sealing strips in different battery stacks 1 is not exactly the same, there are differences in the overall heights of the different battery stacks 1 after compression. In the actual packaging operation, for each battery stack 1, it is necessary to adjust the position of the hanging hole 201 of the binding strap 2 according to its actual height, which directly leads to complicated packaging operation and low production efficiency of the packaging operation.

[0046] In the technical solution provided in the present disclosure, an elastic member 34 that can be extended and retracted in the vertical direction is provided between the hook assembly 33 and the mounting seat 32. The extension and retraction of the elastic member 34 can compensate for the overall height difference of different battery stacks 1 after being compressed. Therefore, in the actual packaging operation, there is no need to adjust the position of the hanging hole 201 for each battery stack 1, thereby reducing the operational complexity of the packaging operation and improving the production efficiency of the packaging operation.

[0047] In the present disclosure, the function of the lifting mechanism 31 is to drive the mounting seat 32 and the hook assembly 33 disposed on the mounting seat 32 to rise or fall in the vertical direction, and during the rising process, the strap 2 can be pulled upward. The present disclosure does not specifically limit the specific form of the lifting mechanism 31, for example, it can be a linear module, and the mounting seat 32 is fixed on the slider of the linear module.

[0048] In the present disclosure, the elastic member 34 may adopt any appropriate structural form, for example, it may be a spring.

[0049] In the present disclosure, the hook assembly 33 is used to hook the hanging hole 201 of the strap 2. In some embodiments, the hook assembly 33 is used to hook the hanging hole 201 of the strap 2. Figure 3 As shown, the hook assembly 33 includes a floating seat 331 and a strap hook 332, the floating seat 331 has a limit groove 3311 opening downward, the upper end of the elastic member 34 abuts against the bottom of the limit groove 3311, and the lower end of the elastic member 34 abuts against the mounting seat 32, and the strap hook 332 is used to hook the hanging hole 201 of the strap 2, and the strap hook 332 is movably arranged on the floating seat 331 and can approach or move away from the battery stack 1 along the first horizontal direction, wherein a limit mechanism is provided between the floating seat 331 and the mounting seat 32 to only allow the floating seat 331 to rise or fall in the vertical direction.

[0050] It can be understood that when it is necessary to hook the hanging hole 201 of the strap 2 to perform an upward pulling operation, the strap hook 332 approaches the battery stack 1 along the first horizontal direction, thereby facilitating the operation of hooking the hanging hole 201 of the strap 2; when the strap is pulled upward into place, the strap hook 332 moves away from the battery stack along the first horizontal direction, thereby allowing it to be easily withdrawn from the hanging hole 201 of the strap 2.

[0051] In the present disclosure, based on the conventional strapping packaging position, the first horizontal direction is along the width direction of the battery stack 1. Figure 4 and Figure 6 As shown, the first horizontal direction is the X direction in the figure.

[0052] In some embodiments, in order to facilitate the control of the movement of the strap hook 332 on the floating seat 331, as shown in FIG. Figure 3 As shown, the hook assembly 33 provided by the present disclosure further includes a first driving component 333 disposed on the floating seat 331, and the first driving component 333 is used to drive the strap hook 332 to approach or move away from the battery stack 1 along the first horizontal direction. During the packaging operation, the strap hook 332 is moved close to the battery stack 1 along the first horizontal direction by the first driving component 333, which effectively ensures that the strap 2 is as close to the side of the battery stack 1 as possible during the process of being pulled upward, thereby facilitating subsequent operations.

[0053] It is understandable that in order to ensure the stability of the strap hook 332 when it approaches or moves away from the fuel cell stack 1 along the first horizontal direction, a hook guide seat 3313 is further provided on the floating seat 331 , and the strap hook 332 is movably connected to the hook guide seat 3313 .

[0054] In the present disclosure, a limiting mechanism is provided between the floating seat 331 and the mounting seat 32 to ensure the stability of the floating seat 331 during the floating process. It should be noted that the limiting mechanism in the present disclosure can be in any appropriate form as long as it can make the floating seat 331 rise or fall only in the vertical direction. In some embodiments, such as Figure 3 As shown, the limiting mechanism includes a guide hole 3312 provided on the floating seat 331 and extending in the vertical direction, and a guide column 321 extending in the vertical direction is provided on the mounting seat 32, and the guide column 321 is movably connected in the guide hole 3312. More specifically, the guide column 321 and the guide hole 3312 are movably connected through a guide sleeve installed in the guide hole 3312. In some embodiments, two guide columns 321 are provided on the mounting seat 32, and the two guide columns 321 are respectively provided on both sides of the elastic member 34, and two guide holes 3312 are provided on the floating seat 331, and the two guide holes 3312 correspond to the two guide columns 321 one by one.

[0055] In the present disclosure, after the strap is pulled into place, it is necessary to compress and bend the strap so that it is close to the surface of the battery stack to facilitate subsequent welding and fixing operations. In some embodiments, a compression and bending assembly 40 located above the hook assembly 33 is provided on the mounting seat 32, and the compression and bending assembly 40 is used to compress and bend the strap 2 pulled into place by the hook assembly 33.

[0056] In the present disclosure, the compression and bending assembly 40 may adopt any appropriate structural form, as long as it can achieve compression and bending of the strap 2. Figure 2 As shown, the compression and bending assembly 40 includes a second driving component 41, a compression component 42, a third driving component 43 and a bending component 44. The second driving component 41 and the third driving component 43 are fixed on the mounting seat 32 in sequence from bottom to top. The second driving component 41 is used to drive the compression component 42 to approach or move away from the battery stack 1 along a first horizontal direction, and can compress the strap 2 to the side of the battery stack 1 when the compression component 42 approaches the battery stack 1; the third driving component 43 is used to drive the bending component 44 to approach or move away from the battery stack 1 along the first horizontal direction, and can bend the strap 2 when the bending component 44 approaches the battery stack 1.

[0057] A second aspect of the present disclosure provides a battery stack packaging device, such as Figure 4 , Figure 5 and Figure 6 As shown, the battery stack packaging device includes a frame 10, a stack pressing assembly 20 and the above-mentioned strap lifting mechanism 30; the frame 10 is used to place the battery stack 1, the stack pressing assembly 20 is arranged above the battery stack 1, and is used to compress the battery stack 1 to be packaged, and two strap lifting mechanisms 30 are provided, and the two strap lifting mechanisms 30 are arranged below the stack pressing assembly 20 and are respectively located on both sides of the battery stack 1 to be packaged. During the packaging operation, the two free ends of the strap 2 inserted under the battery stack 1 are pulled upward by the two strap lifting mechanisms 30, and after being pulled into place, the strap 2 is compressed, bent and welded, thereby realizing the packaging of the battery stack 1.

[0058] It can be understood that in the present disclosure, the frame 10 mainly plays a supporting and fixing role, and is used to install and arrange components such as the stacking assembly 20 and the strap lifting mechanism 30.

[0059] In the present disclosure, the stack pressing assembly 20 is used to compress the battery stack 1 to be packaged. In some embodiments, the stack pressing assembly 20 includes a fourth driving component 21 and a pressing head 22. The fourth driving component 21 is used to drive the pressing head 22 to rise or fall in a vertical direction, and the pressing head 22 can squeeze the battery stack 1 placed on the frame 10 when descending in a vertical direction.

[0060] In some embodiments, the stacking assembly 20 also includes a pressing plate 23, the telescopic end of the fourth driving component 21 is fixedly connected to the upper surface of the pressing plate 23, and the pressing head 22 is fixed to the lower surface of the pressing plate 23; the frame 10 is provided with a support column 11 extending in the vertical direction, and the pressing plate 23 is provided with a limiting hole 231 for the support column 11 to pass through, and the support column 11 is used to limit the pressing plate 23 so that it can only rise or descend in the vertical direction.

[0061] It is understandable that in the present disclosure, by setting a pressing plate 23 between the pressing head 22 and the fourth driving component 21, the two strap pulling mechanisms 30 are conveniently arranged through the pressing plate 23; the limiting holes 231 set on the pressing plate 23 can form a guide limiting match with the support column 11 on the frame 10, so that the pressing plate 23 remains stable during the process of rising or falling in the vertical direction. In some embodiments, there are four limiting holes 231 on the pressing plate 23, and the four limiting holes 231 are respectively located at the four corners of the pressing plate 23 and respectively form a guide limiting match with the four support columns 11 on the frame 10.

[0062] In some embodiments, the stack packaging device provided by the present disclosure further includes a welding assembly, which is disposed below the stack pressing assembly 20 and is used for welding the fixing strap 2 .

[0063] In the present disclosure, the welding assembly may adopt a conventional structural assembly, as long as the free ends of the bent and overlapped binding straps 2 can be welded and fixed together, which will not be elaborated in the present disclosure.

[0064] In some embodiments, the stack packaging device provided by the present disclosure further includes a transverse movement module 50 , which is disposed below the stack pressing assembly 20 , and the strap lifting mechanism 30 is disposed on the transverse movement module 50 and can move along the second horizontal direction following the transverse movement module 50 .

[0065] In the present disclosure, based on the conventional strapping packaging position, the second horizontal direction is along the length direction of the battery stack. Figure 4 and Figure 5 As shown, the second horizontal direction is the Y direction in the figure.

[0066] In the present disclosure, the traverse module 50 can be specifically selected as a linear module.

[0067] It should be noted that, in the present disclosure, the first driving component 333, the second driving component 41, the third driving component 43 and the fourth driving component 21 can be in any appropriate form, as long as they can play a corresponding driving role. In some embodiments, the first driving component 333, the second driving component 41, the third driving component 43 and the fourth driving component 21 are each independently selected as a cylinder, a gas cylinder or a hydraulic cylinder, and the present disclosure does not make any special limitation on this.

[0068] In the present disclosure, the binding strap 2 may be made of any appropriate material as long as it can meet the packaging requirements of the battery stack 1. In some embodiments, the binding strap 2 is a steel strap.

[0069] See also Figure 4-6 The process of packaging the battery stack 1 based on the battery stack packaging device provided by the present invention includes: placing the battery stack 1 to be packaged on the frame 10 and directly below the stack pressing assembly 20, the fourth driving component 21 of the stack pressing assembly 20 drives the pressing plate 23 to move downward, driving the pressing head 22 to compress the battery stack 1, and when the specified pressure is reached, the stack pressing assembly 20 stops pressing downward; passing the strap 2 from under the battery stack 1. It should be noted that in order to allow the strap 2 to pass through, an avoidance groove is provided on the support plate for supporting the battery stack 1. The hook components 33 on the two strap lifting mechanisms 30 are respectively hooked on the two hanging holes 201 at both ends of the strap 2, and then the first driving component 333 on the hook component 33 drives the strap hook 332 to approach the battery stack 1 along the first horizontal direction, so that the strap 2 can be close to the side of the battery stack 1, and then the lifting mechanism 31 drives the mounting seat 32 to rise in the vertical direction, and simultaneously drives the hook component 33 hooked on the strap 2 to rise in the vertical direction. When the strap 2 is tightened, the lifting mechanism 31 can still drive the mounting seat 32 to rise. At this time, the hook component 33 cannot rise due to the obstruction of the hanging hole 201 on the strap 2, so the floating seat 331 and the strap hook 332 can be maintained at a fixed height, which is always synchronized with the hanging hole 201. As the mounting seat 32 rises, the elastic member 34 between the mounting seat 32 and the floating seat 331 will be compressed. When the bending piece 44 of the tight bending assembly 40 is higher than the upper end of the battery stack 1 by exactly the thickness of one layer of the strap 2, the lifting mechanism 31 stops moving, and the second driving components 41 on the two compression and bending assemblies 40 on both sides of the battery stack 1 respectively drive the compression pieces 42 to approach the battery stack 1 along the first horizontal direction to press the strap 2 to the side of the battery stack 1, and then the third driving components 43 on the two compression and bending assemblies 40 respectively drive the bending pieces 44 to approach the battery stack 1 along the first horizontal direction to bend the two free ends of the strap 2. After bending, the two free ends of the strap 2 are overlapped together and then fixed by welding with a welding assembly. After welding is completed, the components are reset; the transverse movement module 50 moves along the second horizontal direction and drives the two strap lifting mechanisms 30 to move to the next strap installation position, and then repeats the above operation to complete the strap packaging of the entire battery stack.

[0070] Based on the above operation process, it can be seen that in the process of driving the free end of the strap 2 to rise to a certain height through the strap lifting mechanism 30, after the strap 2 is tightened, the hanging hole 201 generates resistance to the strap hook 332, causing the floating seat 331 to compress the elastic member 34, and the height is always synchronized with the hanging hole 201 of the strap 2, thereby ensuring that during the packaging operation of the battery stack 1, the position of the hanging hole 201 remains unchanged, and the lifting height of the strap 2 remains unchanged. Within the compression stroke range of the elastic member 34, the height difference of the battery stack 1 caused by the inconsistent thickness of the bipolar plate rubber strips of the battery stack 1 is compatible. Through the battery stack packaging device provided by the present disclosure, there is no need to specifically adjust the position of the strap hanging hole during the packaging operation, so the battery stack packaging device provided by the present disclosure can simplify the packaging operation and improve the production efficiency of the packaging operation.

[0071] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0072] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A strap pulling mechanism (30) for battery stack packaging, characterized in that: include: Lifting mechanism (31); A mounting seat (32), wherein the mounting seat (32) is arranged on the lifting mechanism (31) and can rise or fall along the vertical direction following the lifting mechanism (31); A hook assembly (33), the hook assembly (33) being used to hook onto a hanging hole (201) of a binding belt (2); and An elastic member (34), one end of the elastic member (34) is fixed on the mounting seat (32), and the other end is fixedly connected to the hook assembly (33), and the elastic member (34) is configured to be able to extend and retract in a vertical direction.

2. The strap pulling mechanism (30) for battery stack packaging according to claim 1, characterized in that: The hook assembly (33) comprises: a floating seat (331), the floating seat (331) having a limiting groove (3311) opening downward, the upper end of the elastic member (34) abutting against the bottom of the limiting groove (3311), and the lower end of the elastic member (34) abutting against the mounting seat (32); and A binding strap hook (332), the binding strap hook (332) being used to hook the hanging hole (201) of the binding strap (2), the binding strap hook (332) being movably arranged on the floating seat (331) and being able to approach or move away from the battery stack (1) along a first horizontal direction; Wherein, a limiting mechanism is provided between the floating seat (331) and the mounting seat (32) to only allow the floating seat (331) to rise or fall in the vertical direction.

3. The strap pulling mechanism (30) for battery stack packaging according to claim 2, characterized in that: The hook assembly (33) further comprises a first driving component (333) arranged on the floating seat (331), wherein the first driving component (333) is used to drive the strap hook (332) to move closer to or farther from the battery stack (1) along a first horizontal direction.

4. The strap pulling mechanism (30) for battery stack packaging according to claim 2, characterized in that: The limiting mechanism comprises a guide hole (3312) arranged on the floating seat (331) and extending in the vertical direction, and the mounting seat (32) is provided with a guide column (321) extending in the vertical direction, and the guide column (321) is movably connected in the guide hole (3312).

5. The strap pulling mechanism (30) for battery stack packaging according to any one of claims 1 to 4, characterized in that: The mounting seat (32) is provided with a pressing and bending assembly (40) located above the hook assembly (33), and the pressing and bending assembly (40) is used to press and bend the binding strap (2) pulled into place by the hook assembly (33).

6. The strap pulling mechanism (30) for battery stack packaging according to claim 5, characterized in that: The pressing and bending assembly (40) comprises a second driving component (41), a pressing component (42), a third driving component (43) and a bending component (44); The second driving component (41) and the third driving component (43) are fixed on the mounting seat (32) in sequence from bottom to top, and the second driving component (41) is used to drive the pressing component (42) to approach or move away from the battery stack (1) along a first horizontal direction, and can press the binding belt (2) to the side of the battery stack (1) when the pressing component (42) approaches the battery stack (1); The third driving component (43) is used to drive the bending member (44) to approach or move away from the battery stack (1) along a first horizontal direction, and is capable of bending the binding belt (2) when the bending member (44) approaches the battery stack (1).

7. A battery stack packaging device, characterized in that: It comprises a frame (10), a stacking assembly (20) and a strap lifting mechanism (30) according to any one of claims 1 to 6; The frame (10) is used to place the battery stack (1); the stack pressing assembly (20) is arranged above the battery stack (1) and is used to compress the battery stack (1) to be packaged; two strap lifting mechanisms (30) are provided, and the two strap lifting mechanisms (30) are arranged below the stack pressing assembly (20) and are respectively located on both sides of the battery stack (1) to be packaged.

8. The battery stack packaging device according to claim 7, characterized in that: The stack pressing assembly (20) comprises a fourth driving component (21) and a pressing head (22); the fourth driving component (21) is used to drive the pressing head (22) to rise or fall in a vertical direction, and the pressing head (22) is capable of pressing the battery stack (1) placed on the frame (10) when falling in a vertical direction.

9. The battery stack packaging device according to claim 8, characterized in that: The stacking assembly (20) further comprises a pressing plate (23), the telescopic end of the fourth driving component (21) is fixedly connected to the upper plate surface of the pressing plate (23), and the pressing head (22) is fixed to the lower plate surface of the pressing plate (23); The frame (10) is provided with a support column (11) extending in a vertical direction, the pressing plate (23) is provided with a limiting hole (231) for the support column (11) to pass through, and the support column (11) is used to limit the pressing plate (23) so that it can only rise or fall in a vertical direction.

10. The battery stack packaging device according to claim 7, characterized in that: The stack packaging device further comprises a welding assembly, which is arranged below the stack pressing assembly (20) and is used for welding a fixing strap (2); and / or The battery stack packaging device further comprises a transverse movement module (50), wherein the transverse movement module (50) is arranged below the stack pressing assembly (20), and the strap lifting mechanism (30) is arranged on the transverse movement module (50) and is capable of following the transverse movement module (50) to move along a second horizontal direction.

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