Electric pile assembling and detecting device

Abstract

The utility model relates to an electric pile assembling and detecting device. The electric pile assembling and detecting device comprises a rack, a pressing mechanism and a screw tightening mechanism, the rack is provided with an overlying position used for stacking battery monomers, and the stacked battery monomers are connected through a screw to form an electric pile. And the pressing mechanism is arranged on the rack and is used for applying pressure to the stacked single batteries. The screw tightening mechanism is used for fastening the screw; the screw tightening mechanism comprises a manipulator and an electric screwdriver; the operation end of the mechanical arm is connected with the electric screwdriver and can drive the electric screwdriver to move within the overlying position range or avoid the overlying position. The screw tightening mechanism is arranged to comprise the mechanical arm and the electric screwdriver, and the electric screwdriver can perform twisting operation on the screw in the overlying position range, so that the screw tightening mechanism can be suitable for various types of electric piles. Moreover, the electric screwdriver can be driven by the manipulator to move to the outside of the laminating position, so that the electric screwdriver is prevented from interfering with the stacking of the battery monomers or the end plates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow battery, in particular to a stack assembling and detecting device. BACKGROUND

[0002] Flow battery, also known as redox flow battery, has the advantages of relative stability, flexible design, high efficiency, environmental protection and large-scale energy storage. The flow battery is composed of a plurality of single cells stacked in series, and is fastened by a screw rod after being pressed by front and rear end plates.

[0003] The traditional flow battery assembling device has a tightening mechanism for tightening the screw rod. However, the adjustment of the tightening mechanism is not flexible enough, and it is generally only suitable for a specific type of flow battery. For different types of flow batteries, the positions of the screw rods may be different, so the tightening mechanism cannot be aligned with the screw rod, and the appropriate tightening mechanism needs to be replaced, which is time-consuming and laborious, and seriously affects the assembly efficiency. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a stack to improve the adjustment flexibility of the tightening mechanism, so that the tightening mechanism can be suitable for screw rod fastening of flow batteries of various specifications.

[0005] The present application provides a stack assembling and detecting device, comprising:

[0006] A rack is provided with a stacking position for stacking battery monomers, and the stacked battery monomers are connected by a screw rod to form a stack;

[0007] A pressing mechanism is arranged on the rack, and the pressing mechanism is used to apply pressure to the stacked battery monomers;

[0008] A screw rod tightening mechanism is used to tighten the screw rod; the screw rod tightening mechanism comprises a mechanical hand and an electric screwdriver; the operating end of the mechanical hand is connected to the electric screwdriver and can drive the electric screwdriver to move in the range of the stacking position or avoid the stacking position.

[0009] In some embodiments, the screw rod tightening mechanism further comprises:

[0010] A vision system is arranged on the fixed end of the mechanical hand and is used to identify the position of the screw rod.

[0011] In some embodiments, the vision system comprises a camera, which is used to take pictures of the battery monomers and the screw rod in the stacking position.

[0012] In some embodiments, the screw rod tightening mechanism is provided with at least two groups, and the at least two groups of screw rod tightening mechanisms are arranged at intervals around the stacking position.

[0013] In some embodiments, the pressing mechanism comprises:

[0014] The pressing plate is arranged on one side of the stack along the stacking direction of the battery monomers, and one surface of the pressing plate is perpendicular to the stacking direction of the battery monomers.

[0015] The pressing driving member is arranged on the rack, and the driving end of the pressing driving member is connected to the pressing plate, and the pressing driving member can drive the pressing plate to reciprocate along the stacking direction of the battery monomers.

[0016] In some embodiments, the pressing mechanism further comprises:

[0017] The pressure sensor is arranged on the side of the pressing plate facing the stack, and is used to sense the pressing force of the pressing plate on the stack.

[0018] In some embodiments, the pressing mechanism further comprises:

[0019] The mounting plate is arranged on the rack, and the fixed end of the pressing driving member is connected to the mounting plate, and the pressing plate is located on the side of the mounting plate facing the stacking position.

[0020] In some embodiments, the mounting plate is movably connected to the rack along the stacking direction of the battery monomers, and can be stopped at a preset position.

[0021] In some embodiments, the stack assembling and detecting device further comprises:

[0022] The airtightness detecting mechanism is arranged on the rack or the pressing mechanism, and is used to detect the airtightness of the stack.

[0023] In some embodiments, the airtightness detecting mechanism comprises:

[0024] The plug is used to connect with the gas hole of the stack;

[0025] The driving member is connected to the rack or the pressing mechanism at the fixed end, and is connected to the plug at the driving end, and can drive the plug to move along the stacking direction of the battery monomers and in the plane perpendicular to the stacking direction of the battery monomers.

[0026] The gas supply device is connected to the plug through the connecting pipeline, and is used to supply gas to the plug.

[0027] The fuel cell stack assembly and testing apparatus provided in this application constructs a stacking position for stacking individual battery cells by setting up a frame, allowing end plates and individual battery cells to be stacked on the stacking position. After stacking, a clamping mechanism applies pressure to the upper end plate to press multiple individual battery cells together. Then, a screw tightening mechanism tightens the screws to secure the end plates and individual battery cells, completing the fuel cell stack assembly. By configuring the screw tightening mechanism to include a robotic arm and an electric screwdriver, the robotic arm can drive the electric screwdriver to move flexibly, allowing the electric screwdriver to perform screw tightening operations within the stacking position range. This makes the screw tightening mechanism applicable to various types of fuel cell stacks, improving the compatibility of the fuel cell stack assembly and testing apparatus. Moreover, the electric screwdriver can be moved outside the stacking position under the drive of the robotic arm to avoid interference with the stacking of individual battery cells or end plates. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the fuel cell stack assembly and testing device provided in one embodiment of this application;

[0029] Figure 2 This is a partial structural schematic diagram of the fuel cell stack assembly and testing device provided in one embodiment of this application;

[0030] Figure 3 This is a partial structural schematic diagram of the screw tightening mechanism provided in one embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the airtightness testing mechanism provided in one embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Battery stack; 110. Cell; 120. End plate; 130. Screw; 140. Vent;

[0034] 1. Frame; 10. Stacking position; 11. Base; 12. Column;

[0035] 2. Clamping mechanism; 21. Pressure plate; 22. Clamping drive component; 23. Mounting plate; 24. Protective plate;

[0036] 3. Screw tightening mechanism; 31. Robotic arm; 32. Electric screwdriver; 33. Vision system;

[0037] 4. Air tightness testing mechanism; 41. Plug; 42. First drive component; 43. Second drive component; 44. Connecting pipe; 45. Guide chain; 46. First connector; 47. Second connector. Detailed Implementation

[0038] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0039] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0041] In the present application, unless otherwise explicitly specified and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless specifically defined and limited otherwise, if there is a description of a first feature on or above or below a second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above or above or above the second feature, or the first feature can be directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature can be below or below or below the second feature, or the first feature can be directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0043] It should be noted that if an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0044] Referring to Figure 1 and Figure 2 , Figure 1 The structure of the stack assembly and detection device provided in an embodiment of the present application is shown in a schematic diagram; Figure 2 The structure of the stack assembly and detection device provided in an embodiment of the present application is shown in a schematic diagram. The present embodiment provides a stack assembly and detection device for assembling the stack 100. The stack 100 includes a plurality of battery monomers 110 stacked in sequence, and the two sides of the stacked battery monomers 110 are provided with end plates 120, and a screw rod 130 connects the two end plates 120. Among them, the end of the screw rod 130 extending out of the end plate 120 is provided with a nut, and by tightening the nut, the screw rod 130 is fastened to the two end plates 120. During assembly, the lower end plate 120, the plurality of battery monomers 110 and the upper end plate 120 are stacked in sequence, and the stacked battery monomers 110 are pressed tightly by pressing the two end plates 120, and then the nut of the screw rod 130 is tightened to fasten the two end plates 120, so as to fasten the plurality of battery monomers 110.

[0045] The electric pile assembling and detecting device provided by the embodiments of the present application comprises a rack 1, a pressing mechanism 2 and a screw tightening mechanism 3. The rack 1 is provided with a stacking position 10 for stacking battery monomers 110. The stacked battery monomers 110 are connected by a screw 130 to form an electric pile 100. The pressing mechanism 2 is arranged on the rack 1 and is used to apply pressure to the stacked battery monomers 110. The screw tightening mechanism 3 is used to tighten the screw 130. The screw tightening mechanism 3 comprises a mechanical hand 31 and an electric wrench 32. The operating end of the mechanical hand 31 is connected to the electric wrench 32 and can drive the electric wrench 32 to move within the range of the stacking position 10 or to avoid the stacking position 10. Optionally, the mechanical hand 31 can be a four-axis mechanical hand, a five-axis mechanical hand, a six-axis mechanical hand or a mechanical hand with more axes.

[0046] The electric pile assembling and detecting device provided by the embodiments of the present application comprises a rack 1, a pressing mechanism 2 and a screw tightening mechanism 3. The rack 1 is provided with a stacking position 10 for stacking battery monomers 110. The stacked battery monomers 110 are connected by a screw 130 to form an electric pile 100. The pressing mechanism 2 is arranged on the rack 1 and is used to apply pressure to the stacked battery monomers 110. The screw tightening mechanism 3 is used to tighten the screw 130. The screw tightening mechanism 3 comprises a mechanical hand 31 and an electric wrench 32. The operating end of the mechanical hand 31 is connected to the electric wrench 32 and can drive the electric wrench 32 to move within the range of the stacking position 10 or to avoid the stacking position 10. Optionally, the mechanical hand 31 can be a four-axis mechanical hand, a five-axis mechanical hand, a six-axis mechanical hand or a mechanical hand with more axes.

[0047] The electric pile assembling and detecting device provided by the embodiments of the present application comprises a rack 1, a pressing mechanism 2 and a screw tightening mechanism 3. The rack 1 is provided with a stacking position 10 for stacking battery monomers 110. The stacked battery monomers 110 are connected by a screw 130 to form an electric pile 100. The pressing mechanism 2 is arranged on the rack 1 and is used to apply pressure to the stacked battery monomers 110. The screw tightening mechanism 3 is used to tighten the screw 130. The screw tightening mechanism 3 comprises a mechanical hand 31 and an electric wrench 32. The operating end of the mechanical hand 31 is connected to the electric wrench 32 and can drive the electric wrench 32 to move within the range of the stacking position 10 or to avoid the stacking position 10. Optionally, the mechanical hand 31 can be a four-axis mechanical hand, a five-axis mechanical hand, a six-axis mechanical hand or a mechanical hand with more axes.

[0048] In some embodiments, please refer to Figure 1 and Figure 2, the rack 1 comprises a base 11 and a plurality of columns 12 which are arranged on the base 11 in a spaced manner and cooperate with the base 11 to enclose the stacking position 10. The manipulator 31 is arranged outside the base 11 and the plurality of columns 12, and the electric wrench 32 can be driven to extend into the stacking position 10 between the two columns 12 to screw the screw rod 130. The battery monomer 110 and the end plate 120 and other components to be assembled are also placed into the stacking position 10 between the two columns 12. Specifically, the columns 12 are arranged in four, and the four columns are arranged in a quadrilateral shape.

[0049] In some embodiments, the screw rod tightening mechanism 3 is arranged in at least two groups, and the at least two groups of screw rod tightening mechanisms 3 are arranged in a spaced manner around the stacking position 10. By the at least two groups of screw rod tightening mechanisms 3, the screw rod 130 can be screwed at the same time, which has high working efficiency; at the same time, each group of screw rod tightening mechanisms 3 is responsible for the screwing of part of the screw rod 130, and the electric wrench 32 does not need to pass through the pressing mechanism 2 to screw the screw rod 130 on the other side. In the embodiments of the present application, the screw rod tightening mechanism 3 is arranged in two groups, which are arranged on opposite sides of the base 11.

[0050] In some embodiments, as shown in Figure 2 The pressing mechanism 2 comprises a pressing plate 21 and a pressing driving member 22. The pressing plate 21 is arranged on one side of the battery stack 100 along the stacking direction, and one surface of the pressing plate 21 is perpendicular to the stacking direction of the battery monomer 110. The fixed end of the pressing driving member 22 is arranged on the rack 1, and the driving member of the pressing driving member 22 is connected to the pressing plate 21, which can drive the pressing plate 21 to reciprocate along the stacking direction of the battery monomer 110. The pressing driving member 22 can be a linear driving structure such as an electric cylinder, a pneumatic cylinder or an electric ball screw module. The stacking direction refers to the up-down direction, and the battery monomer 110 is stacked in sequence from bottom to top; the pressing plate 21 is arranged horizontally to vertically press the end plate 120 on the upper side.

[0051] Before the battery monomer 110 is stacked, the pressing plate 21 is driven by the pressing driving member 22 to move upward to provide a space for the stacking of the battery monomer 110, which facilitates the external carrying device or manual operation to carry and stack the battery monomer 110. When pressing is needed, the pressing plate 21 is driven by the pressing driving member 22 to move downward.

[0052] In order to ensure the accuracy of the pressure applied to the battery stack 100, the pressing mechanism 2 further comprises a pressure sensor (not shown in the figure) arranged on the side of the pressing plate 21 facing the battery stack 100, which is used to sense the pressing force of the pressing plate 21 on the battery stack 100, so as to stop the downward movement of the pressing plate 21 when the pressing force reaches the required pressure value.

[0053] Optionally, the pressing plate 21 is set with a downward stroke value according to the pressing force requirement of different stacks 100, and the pressing plate 21 stops moving when it reaches the set stroke value. The stroke value of the pressing plate 21 and the pressure value sensed by the pressure sensor are subjected to logical judgment, and when both of them meet the set value, it is judged that the pressure on the stack 100 meets the requirement. If either the stroke value or the pressure value fails to meet the set requirement, it is judged that the pressure on the stack 100 does not meet the requirement. Through the cooperation of the stroke value and the pressure value, the size and pressure accuracy requirements of the stack 100 are ensured.

[0054] In order to facilitate the installation of the pressing driving member 22, the pressing mechanism 2 further comprises a mounting plate 23 arranged on the rack 1, and the fixed end of the pressing driving member 22 is connected to the mounting plate 23, and the pressing plate 21 is located on the side of the mounting plate 23 facing the stacking position 10. Specifically, the driving end of the pressing driving member 22 extends from the lower side of the mounting plate 23 to connect the pressing plate 21.

[0055] Optionally, the mounting plate 23 is movably connected to the rack 1 along the stacking direction of the battery monomer 110 and can be stopped at a preset position. For different heights of the stack 100, the relative distance between the pressing plate 21 and the stack 100 can be adjusted by adjusting the mounting plate 23 up and down, so as to improve the application range of the pressing mechanism 2.

[0056] Specifically, the mounting plate 23 is provided with sliding holes at four corners, and the column 12 is slidingly arranged in the sliding hole, so that the mounting plate 23 can slide along the column 12. The mounting plate 23 is further provided with pin holes communicating with the sliding holes, and the limit pin is screwed into the pin hole, so that the limit pin abuts against the column 12 to limit the sliding of the mounting plate 23 along the column 12, thereby stopping the mounting plate 23 at the preset position. Of course, in other embodiments, other limiting structures can also be used to limit the sliding of the mounting plate 23 along the column 12, which is not limited herein.

[0057] Further, the pressing mechanism 2 further comprises a protection plate 24 arranged on the side of the mounting plate 23 away from the pressing plate 21, and the protection plate 24 is connected to the column 12. The protection plate 24 is provided with a through hole, and the top end of the pressing driving member 22 is arranged in the through hole. When the mounting plate 23 moves up and down, the pressing driving member 22 moves up and down along the through hole, and the protection plate 24 plays a role of guiding and protecting the fixed end of the pressing driving member 22, which is beneficial to improve the stability and safety of the up and down movement of the pressing driving member 22.

[0058] In combination with FIGS. 1-4, Figure 1 and Figure 3 as shown, Figure 3A partial structure schematic diagram of the screw tightening mechanism 3 in some embodiments of the present application is shown. The screw tightening mechanism 3 further comprises a vision system 33 arranged at the fixed end of the robot arm 31, for identifying the position of the screw 130. By arranging the vision system 33, the position of the screw 130 is accurately identified, so that the electric wrench 32 can be quickly positioned to the screw 130.

[0059] Optionally, the vision system 33 comprises a camera for taking a picture of the battery monomer 110 and the screw 130 in the stacking position 10. After the camera takes the picture, the accurate position information of the screw 130 is sent to the robot arm 31 through model comparison and calculation. After the robot arm 31 obtains the accurate position, the electric wrench 32 is driven to move to the position and is sleeved on the nut of the screw 130, and the nut is started to be tightened.

[0060] In combination with Figure 2 and Figure 4 shown, Figure 4 A structure schematic diagram of the air tightness detection mechanism 4 provided in an embodiment of the present application is shown. In some embodiments, the electric pile assembling and detecting device further comprises an air tightness detection mechanism 4 arranged on the rack 1 or the pressing mechanism 2, for detecting the air tightness of the electric pile 100. Specifically, the end plate 120 on the upper side is provided with an air hole 140, and the air tightness detection mechanism 4 detects the air tightness of the electric pile 100 by communicating with the air hole 140.

[0061] In an embodiment of the present application, the air tightness detection mechanism 4 is connected to the side of the mounting plate 23 facing the base 11, so as to be able to move up and down with the mounting plate 23, and is adapted to electric piles 100 of different heights.

[0062] In some embodiments, the air tightness detection mechanism 4 comprises a plug 41, a driving member and a gas supply device. The plug 41 is used to butt joint with the air hole 140 of the electric pile 100. The fixed end of the driving member is connected to the rack 1 or the pressing mechanism 2, specifically to the mounting plate 23. The driving end of the driving member is connected to the plug 41 and can drive the plug 41 to move along the stacking direction of the battery monomer 110 and in the plane perpendicular to the stacking direction of the battery monomer 110. The gas supply device is connected in communication with the plug 41 through a connecting pipeline 44, for supplying gas to the plug 41.

[0063] During air tightness detection, the plug 41 is driven by the driving member to move to the air hole 140, so that the plug 41 is connected to the air hole 140. The electromagnetic valve of the air hole 140 is opened to open the air hole 140, so that the plug 41 is in communication with the internal gas path of the electric pile 100. Then, inert gas is filled into the electric pile 100 until the test pressure is reached. After that, the air pressure in the electric pile 100 is detected to test the air tightness of the electric pile 100.

[0064] In some embodiments, the driving member includes a first driving member 42 and a second driving member 43. The first driving member 42 is configured to drive the plug 41 to reciprocate along the stacking direction of the battery monomers 110, so as to move the plug 41 close to or away from the battery stack 100. The second driving member 43 is configured to drive the plug 41 to move in a plane perpendicular to the stacking direction of the battery monomers 110, so as to move the plug 41 in the plane of the end plate 120 to align with the air hole 140. Optionally, the first driving member 42 and the second driving member 43 are gas cylinders or electric cylinders.

[0065] Specifically, the air tightness detection mechanism 4 further includes a first connecting member 46 fixedly connected to the bottom side of the mounting plate 23. The fixed end of the first driving member 42 is slidingly connected to the first connecting member 46, and the driving end of the first driving member 42 is connected to the plug 41. By sliding the fixed end of the first driving member 42 along the first connecting member 46, the plug 41 is moved in a plane perpendicular to the stacking direction of the battery monomers 110, i.e., horizontally.

[0066] The fixed end of the second driving member 43 is connected to the bottom side of the mounting plate 23, and the driving end of the second driving member 43 is connected to the fixed end of the first driving member 42 and drives the fixed end of the first driving member 42 to slide along the first connecting member 46, thereby realizing the horizontal movement of the plug 41.

[0067] In order to improve the stability of the horizontal movement of the plug 41, the air tightness detection mechanism 4 further includes a guide chain 45 connected to the fixed end of the first driving member 42 and the first connecting member 46, which provides a guide for the horizontal movement of the first driving member 42 to improve the stability of the movement of the first driving member 42.

[0068] Specifically, one end of the guide chain 45 is connected to the fixed end of the first driving member 42 through a second connecting member 47. At the same time, the connecting pipeline 44 is connected to the second connecting member 47 to support the connecting pipeline 44 through the second connecting member 47, so that the arrangement of the connecting pipeline 44 is stable and orderly.

[0069] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0070] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A device for assembling and testing fuel cell stacks, characterized in that, include: The frame (1) is provided with stacking positions (10) for stacking battery cells (110), and the stacked battery cells (110) are connected by screws (130) to form a battery stack (100). A clamping mechanism (2) is disposed on the frame (1) and is used to apply pressure to the stacked battery cells (110); A screw tightening mechanism (3) is used to tighten the screw (130); the screw tightening mechanism (3) includes a robot (31) and an electric screwdriver (32); the operating end of the robot (31) is connected to the electric screwdriver (32) and can drive the electric screwdriver (32) to move within the stacking position (10) or avoid the stacking position (10).

2. The fuel cell stack assembly and testing apparatus according to claim 1, characterized in that, The screw tightening mechanism (3) further includes: A vision system (33) is disposed at the fixed end of the robotic arm (31) for identifying the position of the screw (130).

3. The fuel cell stack assembly and testing apparatus according to claim 2, characterized in that, The vision system (33) includes a camera for taking pictures of the battery cell (110) and the screw (130) of the stack (10).

4. The fuel cell stack assembly and testing apparatus according to claim 1, characterized in that, The screw tightening mechanism (3) is provided in at least two sets, and the at least two sets of the screw tightening mechanism (3) are arranged at intervals around the stacking position (10).

5. The fuel cell stack assembly and testing apparatus according to any one of claims 1-4, characterized in that, The clamping mechanism (2) includes: A pressure plate (21) is disposed on one side of the stack (100) along the stacking direction, and one surface of the pressure plate (21) is perpendicular to the stacking direction of the battery cell (110); A pressing drive (22) is provided with its fixed end on the frame (1). The drive of the pressing drive (22) is connected to the pressure plate (21) and can drive the pressure plate (21) to reciprocate along the stacking direction of the battery cells (110).

6. The fuel cell stack assembly and testing apparatus according to claim 5, characterized in that, The clamping mechanism (2) further includes: A pressure sensor is disposed on the side of the pressure plate (21) facing the fuel cell stack (100) to sense the pressure exerted by the pressure plate (21) on the fuel cell stack (100).

7. The fuel cell stack assembly and testing apparatus according to claim 5, characterized in that, The clamping mechanism (2) further includes: Mounting plate (23) is mounted on the frame (1), the fixed end of the pressing drive (22) is connected to the mounting plate (23), and the pressure plate (21) is located on the side of the mounting plate (23) facing the stacking position (10).

8. The fuel cell stack assembly and testing apparatus according to claim 7, characterized in that, The mounting plate (23) is movably connected to the frame (1) along the stacking direction of the battery cells (110) and can stop at a preset position.

9. The fuel cell stack assembly and testing apparatus according to any one of claims 1-4, characterized in that, The fuel cell stack assembly and testing device also includes: An airtightness testing mechanism (4) is installed on the frame (1) or the clamping mechanism (2) and is used to test the airtightness of the fuel cell stack (100).

10. The fuel cell stack assembly and testing apparatus according to claim 9, characterized in that, The airtightness testing mechanism (4) includes: A plug (41) is used to mate with the vent (140) of the fuel cell stack (100); A drive unit, the fixed end of which is connected to the frame (1) or the clamping mechanism (2), the drive end of which is connected to the plug (41), and is capable of driving the plug (41) to move along the stacking direction of the battery cell (110) and in a plane perpendicular to the stacking direction of the battery cell (110). The gas supply device is connected to the plug (41) via a connecting pipe (44) and is used to supply gas to the plug (41).

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