Stack automatic assembly tool and assembly method thereof

Abstract

The present application belongs to the technical field of nut locking tool, in particular to a device for tightening nuts, especially to an automatic assembly tool for electric pile and an assembly method thereof. The automatic assembly tool for electric pile comprises a tool plate, a driving mechanism and a locking mechanism. The locking mechanism comprises a connecting plate, a pressing assembly, a locking assembly and a control module. Through the design of the separated locking mechanism, the compression of the disc spring and the tightening of the nut are separated by using the pressing assembly and the locking assembly, thereby reducing the demand for torque when tightening the nut, avoiding the use of high-specification torque wrench, reducing the demand for assembly space when tightening the nut, thereby avoiding interference with the surrounding components. At the same time, the selection of low-torque wrench can avoid the phenomenon of nut slipping, improving the stability of electric pile assembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of nut locking tooling, and specifically relates to equipment for tightening nuts, and more particularly to an automatic assembly tooling for a fuel cell stack and an assembly method thereof. Background Art

[0002] During the assembly of a fuel cell stack, disc spring compression and nut tightening are key processes to ensure the stack's airtightness and structural stability.

[0003] In the related art, when assembling the battery stack, the battery stack is assembled directly by tightening the nut with a torque wrench to squeeze the disc spring, forcing the torque wrench to overcome the reaction force of the disc spring and the friction torque of the thread at the same time. As a result, a higher-specification torque wrench needs to be selected, resulting in a simultaneous increase in the size of its drive head and the requirements for operating space. When assembling a small-sized battery stack, the operating space requirements of a high-specification torque wrench are likely to interfere with the other components of the battery stack, making it inconvenient to assemble. At the same time, the high torque output of a high-specification torque wrench is likely to cause an overload risk on a small-sized battery stack, and the probability of nut stripping increases, thereby increasing the probability of battery stack seal failure.

[0004] Therefore, how to prevent high-specification torque wrenches from interfering with nuts when assembling small-specification fuel cell stacks is a technical problem that needs to be solved urgently.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide an automatic assembly tool for a fuel cell stack and an assembly method thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides an automatic assembly tool for a fuel cell stack, comprising:

[0008] Tooling board;

[0009] A driving mechanism, which is arranged on the tooling plate;

[0010] A locking mechanism, which is provided at the end of the driving mechanism and is suitable for locking the nut of the fuel cell stack under the drive of the driving mechanism;

[0011] Wherein, the locking mechanism includes:

[0012] a connecting plate, which is arranged at the end of the driving mechanism;

[0013] A compression assembly, which is provided on the connecting plate and is used to compress the disc spring of the fuel cell stack;

[0014] a locking assembly, which is provided on the connecting plate and is used to tighten the nut of the fuel cell stack;

[0015] The control module is configured to control the driving mechanism to drive the locking mechanism to face the nut of the fuel cell stack, then control the clamping assembly to compress the disc spring, and then control the locking assembly to tighten the nut.

[0016] In an optional embodiment, the pressing assembly includes:

[0017] a first pushing cylinder, which is arranged on the connecting plate;

[0018] a push plate connected to the piston rod of the first push cylinder;

[0019] A pressure pipe, which is arranged at the bottom of the push plate;

[0020] The control module is further configured to control the first push cylinder to drive the pressure tube to descend, sleeve it on the nut of the fuel cell stack, and compress the disc spring.

[0021] In an optional embodiment, the locking assembly includes:

[0022] a second pushing cylinder, which is arranged on the connecting plate;

[0023] a connecting portion connected to the piston rod of the second pushing cylinder;

[0024] An electric torque wrench is provided at the bottom of the connecting portion, and a sleeve of the electric torque wrench extends into the pressure tube from the side wall of the pressure tube;

[0025] The control module is further configured to control the second push cylinder to drive the sleeve of the electric torque wrench to descend, sleeve it on the nut, and control the electric torque wrench to lock the nut.

[0026] In an optional embodiment, the end of the sleeve is exposed from the bottom of the pressure tube;

[0027] A gap is provided between the outer wall of the sleeve and the pressure tube.

[0028] In an optional embodiment, the electric torque wrench includes:

[0029] Wrench body;

[0030] One end of the universal head is connected to the rotating shaft of the wrench body, and the other end is inserted into the top of the sleeve.

[0031] In an optional embodiment, before the clamping assembly compresses the disc spring, the control module is also configured to control the second push cylinder to drive the sleeve of the electric torque wrench to descend and abut against the disc spring, and detect the tilt posture of the sleeve, thereby detecting the size of the nut.

[0032] In an optional embodiment, the tilt posture of the casing is detected as follows:

[0033] A touch switch is provided on one side of the bottom of the pressure tube facing the outer wall of the sleeve;

[0034] The control module is electrically connected to the touch switch;

[0035] When the control module receives the touch signal of the touch switch, it sends a prompt signal, indicating that the size of the nut is too small at this time.

[0036] In an optional embodiment, the rotating shaft extends radially outward to form a clamping block;

[0037] The top of the sleeve is provided with a socket for inserting the card block.

[0038] In an optional embodiment, the driving mechanism includes:

[0039] a first moving portion and a second moving portion;

[0040] The first moving part is arranged at the bottom of the tooling plate;

[0041] The second moving part is arranged on the first moving part and is used to move along the first direction under the drive of the first moving part;

[0042] The locking mechanism is provided on the second moving portion and is configured to move along the second direction driven by the second moving portion;

[0043] The first direction is perpendicular to the second direction.

[0044] In a second aspect, an embodiment of the present disclosure further provides an assembly method for the above-mentioned automatic assembly tool for a fuel cell stack, the assembly method comprising:

[0045] The control module controls the driving mechanism to drive the locking mechanism to move above the fuel cell stack;

[0046] The control module aligns the pressing assembly with the disc spring of the fuel cell stack and controls the pressing assembly to compress the disc spring;

[0047] The control module controls the locking assembly to be sleeved on the nut and tighten the nut.

[0048] The beneficial effect of the present invention is that the automatic assembly tooling for the fuel cell stack and the assembly method thereof are designed with a separate locking mechanism, and a clamping component and a locking component are used to separate the compression of the disc spring from the tightening of the nut, thereby reducing the torque requirement when tightening the nut, thereby avoiding the use of high-specification torque wrenches, and reducing the assembly space requirement when tightening the nut, thereby avoiding interference with surrounding components. At the same time, the selection of a low-torque wrench can avoid the phenomenon of nut slippage, thereby improving the stability of the fuel cell stack assembly.

[0049] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 A schematic structural diagram of an automatic assembly tool for a fuel cell stack provided in an embodiment of the present disclosure;

[0053] Figure 2 A schematic structural diagram of a locking mechanism provided in an embodiment of the present disclosure;

[0054] Figure 3 A schematic diagram of a portion of the structure of the locking mechanism provided in an embodiment of the present disclosure;

[0055] Figure 4 A schematic diagram of the locking mechanism provided in an embodiment of the present disclosure when assembling a fuel cell stack;

[0056] Figure 5 A schematic diagram of a partial structure of the locking mechanism provided in an embodiment of the present disclosure when assembling a fuel cell stack;

[0057] Figure 6 A schematic diagram of a partial structure of the locking mechanism during stack assembly when the nut provided in an embodiment of the present disclosure is too small;

[0058] Figure 7This is a schematic diagram of the electrical control principle of the automatic assembly tool for the fuel cell stack provided in an embodiment of the present disclosure;

[0059] Figure 8 A flowchart of an assembly method for an automatic assembly tool for a fuel cell stack provided in an embodiment of the present disclosure;

[0060] Figure 9 A schematic diagram of assembling a fuel cell stack using an automatic assembly tool provided in an embodiment of the present disclosure.

[0061] In the figure: 100, tooling plate; 200, driving mechanism; 210, first moving part; 220, second moving part; 300, locking mechanism; 310, connecting plate; 320, clamping assembly; 321, first pushing cylinder; 322, pushing plate; 323, pressing tube; 324, touch switch; 330, locking assembly; 331, second pushing cylinder; 332, connecting part; 333, electric torque wrench; 3331, sleeve; 3331a, socket; 3332, gap; 3333, wrench body; 3334, universal head; 3335, rotating shaft; 3336, block; 400, battery stack; 410, disc spring; 420, nut. DETAILED DESCRIPTION

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or that a third component may be interposed between the first component and the second component. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe technical content.

[0064] As used herein, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0065] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." when following a list of elements modify the entire list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0066] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include plural forms, unless otherwise clearly indicated herein. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0067] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0068] Research has found that in related technologies, since there are many electronic components around the fuel cell stack, operations can only be performed in the middle area of ​​the fuel cell stack when assembling the fuel cell stack. Therefore, selecting a higher-specification torque wrench to assemble a small-specification fuel cell stack is likely to interfere with the other components of the fuel cell stack, making assembly inconvenient. At the same time, the nuts are prone to thread slippage, resulting in failure of the fuel cell stack seal.

[0069] Based on the above research, the embodiment of the present disclosure provides an automatic assembly tool for a stack and an assembly method thereof. The compression of the disc spring 410 and the tightening of the nut 420 are separated by the pressing assembly 320 and the locking assembly 330, thereby reducing the requirement of the torque when the nut 420 is tightened, avoiding the use of a high-specification torque wrench, reducing the requirement of the assembly space when the nut 420 is tightened, thereby avoiding interference with the surrounding components. At the same time, the selection of a low-torque wrench can avoid the phenomenon of thread slipping of the nut 420, thereby improving the stability of the stack 400 assembly.

[0070] The above-mentioned defects are the results of the inventors' practice and careful research, and therefore, the discovery process of the above-mentioned problems and the solutions proposed in this paper should be the contributions of the inventors to the present disclosure.

[0071] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0072] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0073] Please refer to Figure 1 and Figure 7 At least one embodiment provides an automatic assembly tool for a stack, comprising: a tool plate 100; a driving mechanism 200 arranged on the tool plate 100; a locking mechanism 300 arranged at the end of the driving mechanism 200 and adapted to lock the nut 420 of the stack 400 under the driving of the driving mechanism 200; wherein the locking mechanism 300 comprises: a connecting plate 310 arranged at the end of the driving mechanism 200; a pressing assembly 320 arranged on the connecting plate 310 and used for compressing the disc spring 410 of the stack 400; a locking assembly 330 arranged on the connecting plate 310 and used for tightening the nut 420 of the stack 400; a control module configured to control the driving mechanism 200 to drive the locking mechanism 300 to be opposite to the nut 420 of the stack 400 (as shown in Figure 9 , then control the pressing assembly 320 to compress the disc spring 410, and then control the locking assembly 330 to tighten the nut 420.

[0074] Through the design of the separate locking mechanism 300, the clamping assembly 320 and the locking assembly 330 are used to separate the compression of the disc spring 410 from the tightening of the nut 420, thereby reducing the torque requirement when tightening the nut 420, thereby avoiding the use of high-specification torque wrenches, and reducing the assembly space requirement when tightening the nut 420, thereby avoiding interference with surrounding components. At the same time, the selection of a low-torque wrench can avoid the phenomenon of thread slippage of the nut 420, thereby improving the stability of the assembly of the battery stack 400.

[0075] See also Figure 2 The clamping assembly 320 includes: a first pushing cylinder 321, which is arranged on the connecting plate 310; a pushing plate 322, which is connected to the piston rod of the first pushing cylinder 321; a pressing tube 323, which is arranged at the bottom of the pushing plate 322; the control module is also configured to control the first pushing cylinder 321 to drive the pressing tube 323 to descend, and be sleeved on the nut 420 of the fuel cell stack 400, and squeeze the disc spring 410.

[0076] The first push cylinder 321 drives the pressure tube 323 to linearly press the disc spring 410 downward to ensure the compression accuracy of the disc spring 410. The compression amount of the spring can be accurately controlled, thereby improving the assembly accuracy.

[0077] Please continue reading Figure 2 The locking assembly 330 includes: a second pushing cylinder 331, which is arranged on the connecting plate 310; a connecting part 332, which is connected to the piston rod of the second pushing cylinder 331; an electric torque wrench 333, which is arranged at the bottom of the connecting part 332, and the sleeve 3331 of the electric torque wrench 333 extends into the pressing tube 323 from the side wall of the pressing tube 323; the control module is also configured to control the second pushing cylinder 331 to drive the sleeve 3331 of the electric torque wrench 333 to descend, be sleeved on the nut 420, and control the electric torque wrench 333 to lock the nut 420.

[0078] The sleeve 3331 and the pressure tube 323 share an axial space, thereby reducing the radial operating size of the electric torque wrench 333 and further reducing the space occupied by the locking mechanism 300, thereby meeting the assembly requirements of a small-sized fuel cell stack 400.

[0079] See also Figure 3 , wherein the end of the sleeve 3331 is exposed from the bottom of the pressing tube 323; and a gap 3332 is set between the outer wall of the sleeve 3331 and the pressing tube 323.

[0080] By providing the gap 3332 , the sleeve 3331 is prevented from contacting the pressing tube 323 when descending, thereby ensuring the stability of the operation of the automatic assembly tool for the fuel cell stack.

[0081] See also Figure 3 and Figure 4 The electric torque wrench 333 includes: a wrench body 3333; a universal head 3334, one end of which is connected to the rotating shaft 3335 of the wrench body 3333, and the other end is inserted into the top of the sleeve 3331.

[0082] Before the pressing assembly 320 compresses the disc spring 410, the control module is further configured to control the second push cylinder 331 to drive the sleeve 3331 of the electric torque wrench 333 to descend, and the descending direction is as follows: Figure 5 As shown in F1, it abuts against the disc spring 410 and detects the tilting posture of the sleeve 3331.

[0083] When the outer edge angle of the nut 420 is too small, the sleeve 3331 will tilt due to the tilted surface of the disc spring 410. Figure 5 As shown in F2, the control module detects the tilt state and then pre-screens the size of the nut 420 to avoid installing nuts 420 that are too small on the fuel cell stack 400, thereby facilitating subsequent disassembly.

[0084] Specifically, the method for detecting the tilt posture of the sleeve 3331 is as follows:

[0085] A touch switch 324 is installed at the bottom of the pressure tube 323, facing the outer wall of the sleeve 3331. The control module is electrically connected to the touch switch 324. When the control module receives a trigger signal from the touch switch 324, it sends a warning signal indicating that the nut 420 is too small. Excessive tilt of the sleeve 3331 triggers the touch switch 324, immediately interrupting the process and sending a warning signal, thereby reducing damage to the outer corners of the nut 420.

[0086] The model of the touch switch is E-Switch TL3304AF160QJ. There are multiple touch switches, and the multiple touch switches are arranged around the bottom of the pressure tube 323 toward one side of the outer wall of the sleeve 3331.

[0087] Please continue reading Figure 5 and Figure 6 The rotating shaft 3335 extends radially outward to form a block 3336 ; the top of the sleeve 3331 is provided with a socket 3331 a for inserting the block 3336 .

[0088] Among them, the card block 3336 is hemispherical, and multiple are arranged along the circumference of the rotating shaft 3335, so as to facilitate the insertion of the card block 3336 into the corresponding socket 3331a. At the same time, the spherical surface can play a guiding role, thereby ensuring the accuracy of the connection between the card block 3336 and the socket 3331a.

[0089] Please continue reading Figure 1 The driving mechanism 200 includes: a first moving part 210 and a second moving part 220; the first moving part 210 is arranged at the bottom of the tooling plate 100; the second moving part 220 is arranged on the first moving part 210, and is used to move along the first direction under the drive of the first moving part 210; the locking mechanism 300 is arranged on the second moving part 220, and is used to move along the second direction under the drive of the second moving part 220; wherein the first direction F1 is arranged perpendicular to the second direction F2.

[0090] See also Figure 8 The present disclosure also provides an assembly method for the above-mentioned automatic assembly tool for a fuel cell stack, the assembly method comprising:

[0091] S110: The control module controls the driving mechanism 200 to drive the locking mechanism 300 to move above the fuel cell stack 400;

[0092] S120 : The control module aligns the pressing assembly 320 with the disc spring 410 of the fuel cell stack 400 , and controls the pressing assembly 320 to compress the disc spring 410 ;

[0093] S130: The control module controls the locking assembly 330 to be sleeved on the nut 420 and tightens the nut 420.

[0094] In summary, the present invention provides an automatic assembly tool for a fuel cell stack and an assembly method thereof, wherein the automatic assembly tool for a fuel cell stack comprises: a tool plate 100; a driving mechanism 200, which is arranged on the tool plate 100; a locking mechanism 300, which is arranged at the end of the driving mechanism 200 and is suitable for locking the nut 420 of the fuel cell stack 400 under the drive of the driving mechanism 200; wherein the locking mechanism 300 comprises: a connecting plate 310, which is arranged at the end of the driving mechanism 200; a pressing mechanism 31 ... A tightening assembly 320 is provided on the connecting plate 310 and is used to compress the disc spring 410 of the battery stack 400; a locking assembly 330 is provided on the connecting plate 310 and is used to tighten the nut 420 of the battery stack 400; a control module is configured to control the driving mechanism 200 to drive the locking mechanism 300 to be opposite to the nut 420 of the battery stack 400, and then control the tightening assembly 320 to tighten the disc spring 410, and then control the locking assembly 330 to tighten the nut 420. Through the design of the separate locking mechanism 300, the compression of the disc spring 410 and the tightening of the nut 420 are separated by the clamping assembly 320 and the locking assembly 330, thereby reducing the torque requirement when tightening the nut 420, thereby avoiding the use of high-specification torque wrenches, and reducing the assembly space requirement when tightening the nut 420, thereby avoiding interference with surrounding components. At the same time, the selection of a low-torque wrench can avoid the phenomenon of thread slippage of the nut 420, thereby improving the stability of the assembly of the fuel cell stack 400.

[0095] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0096] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein unless expressly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0097] Spatially relative terms, such as "inside," "outside," "below," "beneath," "down," "above," "on," etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "below" or "below" other elements or features will be oriented to be "above" the other elements or features. Thus, the example term "below" may encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0098] In the above discussion, unless otherwise indicated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0099] With the above-described preferred embodiments of the present invention as inspiration, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An automatic assembly tool for a fuel cell stack, characterized in that: include: Tooling plate (100); A driving mechanism (200) is provided on the tooling plate (100); a locking mechanism (300), which is arranged at the end of the driving mechanism (200) and is suitable for locking the nut (420) of the battery stack (400) under the drive of the driving mechanism (200); Wherein, the locking mechanism (300) comprises: a connecting plate (310) disposed at the end of the driving mechanism (200); A compression assembly (320) is provided on the connecting plate (310) and is used to compress the disc spring (410) of the battery stack (400); a locking assembly (330), which is arranged on the connecting plate (310) and is used to tighten the nut (420) of the fuel cell stack (400); A control module is configured to control the driving mechanism (200) to drive the locking mechanism (300) to face the nut (420) of the battery stack (400), then control the pressing assembly (320) to press the disc spring (410), and then control the locking assembly (330) to tighten the nut (420); The locking assembly (330) comprises: a second pushing cylinder (331), which is arranged on the connecting plate (310); a connecting portion (332) connected to the piston rod of the second pushing cylinder (331); An electric torque wrench (333) is arranged at the bottom of the connecting portion (332), and a sleeve (3331) of the electric torque wrench (333) extends from the side wall of the pressing tube (323) of the pressing assembly (320) into the pressing tube (323); The control module is further configured to control the second push cylinder (331) to drive the sleeve (3331) of the electric torque wrench (333) to descend, sleeved on the nut (420), and control the electric torque wrench (333) to lock the nut (420); The electric torque wrench (333) comprises: Wrench body (3333); A universal head (3334), one end of which is connected to the rotating shaft (3335) of the wrench body (3333) and the other end of which is inserted into the top of the sleeve (3331); Before the pressing assembly (320) compresses the disc spring (410), the control module is further configured to control the second pushing cylinder (331) to drive the sleeve (3331) of the electric torque wrench (333) to descend and abut against the disc spring (410), and detect the tilting posture of the sleeve (3331), thereby detecting the size of the nut (420).

2. The automatic assembly tool for a fuel cell stack according to claim 1, characterized in that: The pressing assembly (320) comprises: a first pushing cylinder (321), which is arranged on the connecting plate (310); A pushing plate (322) connected to the piston rod of the first pushing cylinder (321); A pressure tube (323) is provided at the bottom of the push plate (322); The control module is further configured to control the first pushing cylinder (321) to drive the pressure tube (323) to descend, be sleeved on the nut (420) of the battery stack (400), and compress the disc spring (410).

3. The automatic assembly tool for a fuel cell stack according to claim 1, characterized in that: The end of the sleeve (3331) is exposed from the bottom of the pressing tube (323); A gap (3332) is provided between the outer wall of the sleeve (3331) and the pressure tube (323).

4. The automatic assembly tool for a fuel cell stack according to claim 3, characterized in that: The method for detecting the tilt posture of the sleeve (3331) is as follows: A touch switch (324) is provided on one side of the bottom of the pressure tube (323) facing the outer wall of the sleeve (3331); The control module is electrically connected to the touch switch (324); When the control module receives the touch signal from the touch switch (324), a prompt signal is sent to indicate that the size of the nut (420) is too small.

5. The automatic assembly tool for a fuel cell stack according to claim 1, characterized in that: The rotating shaft (3335) extends radially outward to form a clamping block (3336); The top of the sleeve (3331) is provided with a socket (3331a) for inserting the block (3336).

6. The automatic assembly tool for a fuel cell stack according to claim 1, characterized in that: The driving mechanism (200) comprises: A first moving part (210) and a second moving part (220); The first moving part (210) is arranged at the bottom of the tooling plate (100); The second moving part (220) is arranged on the first moving part (210) and is used to move along the first direction under the drive of the first moving part (210); The locking mechanism (300) is arranged on the second moving part (220) and is used to move along the second direction under the drive of the second moving part (220); The first direction is perpendicular to the second direction.

7. An assembly method for the automatic assembly tool for a fuel cell stack as claimed in claim 1, characterized in that: The assembly method comprises: The control module controls the driving mechanism (200) to drive the locking mechanism (300) to move above the battery stack (400); The control module aligns the pressing assembly (320) with the disc spring (410) of the battery stack (400), and controls the pressing assembly (320) to compress the disc spring (410); The control module controls the locking assembly (330) to be sleeved on the nut (420) and tighten the nut (420).

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