Assembly tooling for fuel cell stacks and its working method
By setting an elastic detection unit on the limit plate and controlling the screwing robotic arm, the real-time sensing and uniform control of the pressure state of the electrode plates can be achieved, which solves the problem of uneven force on the electrode plates during fuel cell assembly and improves the assembly quality and performance of the fuel cell stack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU DONGTUO NEW ENERGY CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-06-09
AI Technical Summary
In the existing technology, the rotary robotic arm during fuel cell assembly cannot adapt to the actual deformation threshold after different electrode stacks are stacked, resulting in uneven stress on the electrode, structural deformation, increased contact resistance and uneven current distribution.
An elastic detection unit is installed on the limit plate. By collecting the pressure information, the screwing robot arm is controlled to realize real-time perception and uniform control of the pressure state of the electrode, ensuring that the pressure at each point is balanced.
This avoids electrode deformation and increased contact resistance, ensures uniform stress at each point on the electrode, and improves the assembly quality and performance of the fuel cell stack.
Smart Images
Figure CN122177887A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of fuel cell stack assembly technology, specifically relating to an assembly tool for screw tightening of fuel cell stacks, and more particularly to an assembly tool for fuel cell stacks and its working method. Background Technology
[0002] The quality of fuel cell stack assembly directly determines its performance and safety.
[0003] In related technologies, when the stack is assembled, the screw-tightening robotic arm only operates according to a fixed torque when it tightens the screw. This cannot adapt to the actual deformation threshold after different electrode stacks are formed. Tightening will directly compress the electrode and cause structural deformation, while loosening will increase the contact resistance between the electrode and cause uneven current distribution. At the same time, the screw in each position is subjected to uneven force during tightening, resulting in uneven extrusion pressure at each point of the electrode, which further causes fluctuations in the electrode performance.
[0004] Therefore, ensuring that the pressure on the electrodes is balanced during fuel cell assembly to improve fuel cell performance is a pressing technical problem that needs to be solved.
[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention
[0006] This disclosure provides at least one assembly tooling for fuel cell stacks and its working method.
[0007] In a first aspect, embodiments of this disclosure provide an assembly fixture for a fuel cell stack, comprising: An assembly platform, which is equipped with assembly stations; A screwing robotic arm is located on both sides of the assembly platform and is used to screw the screws of the fuel cell stack. The control module is configured to control the screwing robotic arm to screw the screw. The assembly station is surrounded by multiple limiting plates. The top of the limiting plate is provided with an elastic detection part; The control module is also configured to control the screwing robot to screw all the screws based on the pressure information of each elastic detection unit, thereby completing the assembly of the fuel cell stack.
[0008] In one optional embodiment, the limiting plate includes: The motherboard is clamped, and its side wall has a receiving groove; A rotating plate, the middle of which is rotatably disposed in the receiving groove, and the bottom of the rotating plate is elastically connected to the receiving groove through a spring plunger; The elastic detection part is disposed in a groove at the top of the rotating plate, and the top of the elastic detection part protrudes from the top of the rotating plate.
[0009] In one optional embodiment, the elasticity detection unit includes: A trigger sensor is disposed within the groove; A compression cap, which is elastically connected to the groove via a first return spring; When the rotary arm rotates the screw of the fuel cell stack, it drives the pressure plate to squeeze the compression cover. During the descent of the compression cover, the trigger sensor is activated and sends the pressure information to the control module.
[0010] In one optional embodiment, the screwing robotic arm is controlled to screw all the screws based on the pressure information of each elastic detection unit to complete the assembly of the fuel cell stack, i.e.: The control module first controls the screwing robotic arm to perform an initial screwing; The initial tightening is completed only after all the trigger sensors in the elastic detection section have issued a downward pressure signal; The control module controls the screwing robot arm to perform secondary screwing on the screw, completing the assembly of the fuel cell stack.
[0011] In one alternative embodiment, the compression cap includes: The bottom cover has a compression groove on its top, and its bottom surface is elastically connected to the groove by a first return spring. The protrusion is elastically connected to the bottom of the compression groove via a second return spring; An electric drive locking plate is hinged to the side wall of the groove and located below the bottom cover; The trigger sensor is located at the bottom of the compression tank; After the protrusion is fully pressed into the compression groove of the bottom cover, the bottom surface of the protrusion contacts the trigger sensor to trigger the trigger sensor to send down pressure information.
[0012] In an optional embodiment, the control module controls the screw-tightening robotic arm to tighten all screws based on the pressure information of each elastic detection unit, that is: After receiving the pressure information from all the trigger sensors, the controller releases the electric drive locking plate from limiting the bottom cover and then controls the screwing robot arm to screw all the screws.
[0013] In one alternative embodiment, a strain gauge is provided on the top of the compression cap; After the fuel cell stack assembly is completed, the control module is further configured to: suspend the fuel cell stack for a preset time, acquire stress change information from all strain gauges received during that time, and indicate that the fuel cell stack assembly is unqualified when the stress change information exceeds a preset range; when all stress change information is within the preset range, acquire the difference between the maximum and minimum stress information, and if the difference is greater than the preset value, indicate that the fuel cell stack assembly is unqualified.
[0014] In an optional embodiment, the limiting plate further includes: The base has a sliding groove. The clamping motherboard is slidably disposed within the slide groove; The base is equipped with a push rod motor to push the clamping motherboard to slide along the base; Before the control module controls the screw-twisting robotic arm to screw the screw, the control module is also configured to: The control clamping motherboard retracts inward along the slide groove to clamp the electrode sheets stacked on the assembly station.
[0015] Secondly, this disclosure also provides a working method for using the assembly tooling for fuel cell stacks as described above, the working method comprising: The electrodes are stacked at the assembly station; The stacked electrode sheets are clamped and positioned using a limiting plate; Place the pressure plate on the stacked electrode sheets; The control module controls the screwing robot to screw all the screws according to the pressure information of each elastic detection unit, thus completing the assembly of the fuel cell stack.
[0016] In one optional embodiment, the limiting plate includes: The motherboard is clamped, and its side wall has a receiving groove; A rotating plate, the middle of which is rotatably disposed in the receiving groove, and the bottom of the rotating plate is elastically connected to the receiving groove through a spring plunger; The elastic detection part is disposed in a groove at the top of the rotating plate, and the top of the elastic detection part protrudes from the top of the rotating plate; The elasticity detection unit includes: A trigger sensor is disposed within the groove; A compression cap, which is elastically connected to the groove via a first return spring; The control module controls the screwing robot to screw all the screws according to the pressure information of each elastic detection unit, thus completing the assembly of the fuel cell stack. The control module first controls the screwing robotic arm to perform an initial screwing; The initial tightening is completed only after all the trigger sensors in the elastic detection section have issued a downward pressure signal; The control module controls the screwing robot arm to perform secondary screwing on the screw, completing the assembly of the fuel cell stack.
[0017] The beneficial effects of this invention are that the assembly tooling and its working method for this fuel cell stack, by setting an elastic detection unit on the limit plate and controlling the screwing robot arm according to the collected pressure information, realizes real-time perception and uniform control of the pressure state of the electrode, thereby avoiding electrode deformation caused by excessive tightening and preventing increased contact resistance and uneven current distribution caused by excessive loosening. At the same time, the pressure state of the electrode is detected and fed back synchronously by multiple elastic detection units, thereby ensuring the balance of pressure on each point of the electrode.
[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.
[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the assembly tooling for fuel cell stacks provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of the limiting plate provided in an embodiment of the present disclosure; Figure 3 This is a schematic diagram showing the state of the limiting plate clamping the fuel cell stack according to an embodiment of the present disclosure; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 A flowchart illustrating the working method of the assembly tooling for fuel cell stacks provided in this embodiment of the disclosure.
[0022] In the diagram: 100, Assembly platform; 110, Limiting plate; 111, Elastic detection unit; 112, Clamping main board; 1121, Receiving groove; 1122, Spring plunger; 113, Rotating plate; 1131, Groove; 1132, Compression cover; 1132a, Bottom cover; 1132b, Protrusion; 1133, First return spring; 1134, Electric drive locking plate; 114, Base; 200, Twisting robotic arm; 300, Fuel cell stack; 310, Screw; 320, Pressure plate; 330, Electrode. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships 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 related listed items.
[0026] In this document, exemplary 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…” modify the entire list of elements when following a list of elements, rather than 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.
[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is 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 expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude 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 construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., 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 superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0029] Research has revealed that during the assembly of the fuel cell stack, when the screw-tightening robotic arm rotates the screw, it operates only at a fixed torque, which cannot adapt to the actual deformation threshold of different stacked electrodes. Tightening too much will directly compress the electrodes, causing structural deformation, while loosening will increase the contact resistance between electrodes and cause uneven current distribution. At the same time, the screws at different positions are subjected to uneven force during rotation, resulting in uneven pressure on each point of the electrode, which further causes fluctuations in electrode performance.
[0030] Based on the above research, this disclosure provides an assembly fixture for fuel cell stacks and its working method. By setting an elastic detection unit on the limiting plate and controlling the screwing robot arm according to the collected pressure information, the pressure state of the electrode sheet can be perceived in real time and uniformly controlled, thereby avoiding electrode sheet deformation caused by excessive tightening and preventing increased contact resistance and uneven current distribution caused by excessive loosening. At the same time, the pressure state of the electrode sheet is detected and fed back synchronously by multiple elastic detection units, thereby ensuring the balance of pressure on each point of the electrode sheet.
[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0034] Please see 1 and Figure 2 At least one embodiment provides an assembly fixture for a fuel cell stack, comprising: an assembly platform 100 having an assembly station; a screwing robot arm 200 disposed on both sides of the assembly platform 100 and used to screw the screws 310 of the fuel cell stack 300; and a control module configured to control the screwing robot arm 200 to screw the screws 310; wherein, a plurality of limiting plates 110 are disposed around the assembly station; and an elastic detection part 111 is disposed on the top of the limiting plate 110; the control module is further configured to control the screwing robot arm 200 to screw all the screws 310 according to the pressure information of each elastic detection part 111, thereby completing the assembly of the fuel cell stack 300.
[0035] By setting an elastic detection unit 111 on the limiting plate 110 and controlling the screwing robot arm 200 according to the collected pressure information, the pressure state of the electrode 330 can be perceived and uniformly controlled in real time. This avoids deformation of the electrode 330 caused by excessive screwing and prevents increased contact resistance and uneven current distribution caused by excessive looseness. At the same time, the pressure state of the electrode 330 is detected and fed back synchronously by multiple elastic detection units 111, thereby ensuring that the pressure on each point of the electrode 330 is balanced.
[0036] Please see Figure 2 and Figure 3 The limiting plate 110 includes: a clamping main plate 112, the side wall of which is provided with a receiving groove 1121; a rotating plate 113, the middle of which is rotatably disposed in the receiving groove 1121, and the bottom of the rotating plate 113 is elastically connected to the receiving groove 1121 through a spring plunger 1122; and an elastic detection part 111 is disposed in a groove 1131 at the top of the rotating plate 113, and the top of the elastic detection part 111 protrudes from the top of the rotating plate 113.
[0037] The rotating plate 113 achieves slight rotation via the spring plunger 1122. After the electrode sheets 330 are stacked, pushing the rotating plate 113 flattens the misaligned electrode sheets 330 and simultaneously positions the elastic detection unit 111 in a vertical position, facilitating subsequent pressure detection during the assembly of the fuel cell stack 300. Furthermore, after the fuel cell stack 300 is assembled, when the limiting plate 110 releases its restraint on the fuel cell stack 300, the rotating plate 113 causes the elastic detection unit 111 to release its resistance against the pressure plate 320, thereby reducing wear on the elastic detection unit 111.
[0038] Please see Figure 3 and Figure 4 The elastic detection unit 111 includes: a trigger sensor disposed in the groove 1131; and a compression cover 1132 elastically connected to the groove 1131 via a first reset spring 1133. When the rotary arm 200 rotates the screw 310 of the fuel cell stack 300, it drives the pressure plate 320 to squeeze the compression cover 1132. During the descent of the compression cover 1132, the trigger sensor is triggered and sends a downward pressure information to the control module.
[0039] The initial tightening ensures that each electrode 330 is basically pre-tightened. The force of the screw 310 is further calibrated by the second tightening to ensure that all screws 310 are subjected to uniform force, thereby ensuring that the electrode 330 is subjected to uniform force.
[0040] Specifically, the control module controls the screwing robot arm 200 to screw all screws 310 based on the pressure information of each elastic detection unit 111, thereby completing the assembly of the fuel cell stack 300. That is, the control module first controls the screwing robot arm 200 to screw the screws 310 for the first time; after all the trigger sensors of the elastic detection units 111 have issued pressure information, the first screwing is completed; the control module then controls the screwing robot arm 200 to screw the screws 310 for the second time, thereby completing the assembly of the fuel cell stack 300.
[0041] Please continue reading. Figure 3 and Figure 4 The compression cover 1132 includes: a bottom cover 1132a, the top of which has a compression groove, and the bottom surface of which is elastically connected to the groove 1131 via a first return spring 1133; a protrusion 1132b, which is elastically connected to the bottom of the compression groove via a second return spring; an electric drive locking plate 1134, which is hinged to the side wall of the groove 1131 and located below the bottom cover 1132a; and a trigger sensor located at the bottom of the compression groove. After the protrusion 1132b is completely pressed into the compression groove of the bottom cover 1132a, the bottom surface of the protrusion 1132b contacts the trigger sensor to trigger the trigger sensor to send a pressing information.
[0042] The design of the first reset spring 1133 and the second reset spring enhances the pressure buffering capacity and prevents the electrode 330 from being deformed by impact. After the protrusion 1132b is fully pressed into the compression groove, it contacts the trigger sensor to ensure that the pressure information is triggered only when the electrode 330 reaches a reasonable deformation. The electric drive locking plate 1134 releases the limit in conjunction with the trigger signal, thereby preventing the screw 310 from being over-tightened during screwing and further preventing the deformation of the electrode 330.
[0043] Specifically, the control module controls the screwing robot arm 200 to screw all screws 310 based on the pressure information of each elastic detection unit 111. That is, after receiving the pressure information sent by all trigger sensors, the control module controls the electric drive locking plate 1134 to release the limit on the bottom cover 1132a, and then controls the screwing robot arm 200 to screw all screws 310.
[0044] In a preferred embodiment, a strain gauge is provided on the top of the compression cover 1132; after the fuel cell stack 300 is assembled, the control module is further configured to: keep the fuel cell stack 300 stationary for a preset time, acquire stress change information received from all strain gauges during this time, and indicate that the fuel cell stack 300 is unqualified when the stress change information exceeds a preset range; when all stress change information is within the preset range, acquire the difference between the maximum stress information and the minimum stress information, and indicate that the fuel cell stack 300 is unqualified when the difference is greater than the preset value.
[0045] After assembly, the uniformity and stability of the pressure on the electrode 330 are verified by monitoring the stress changes through a preset stress release time, and defective products are further screened out, thereby improving the quality of the fuel cell stack 300.
[0046] Specifically, the limiting plate 110 further includes: a base 114 having a sliding groove; the clamping main board 112 is slidably disposed in the sliding groove; wherein, a push rod motor is disposed in the base 114 to push the clamping main board 112 to slide along the base 114; before the control module controls the screwing robot arm 200 to screw the screw 310, the control module is also configured to: control the clamping main board 112 to retract inward along the sliding groove to clamp the electrode sheets 330 stacked on the assembly station.
[0047] The push rod motor drives the clamping motherboard 112 to slide, thereby ensuring the stability of the stacked electrode 330. At the same time, it also ensures the stability of the electrode 330 when the screw 310 is screwed in, thus ensuring the consistency of the assembly.
[0048] Please see Figure 5This embodiment of the present disclosure also provides a working method using the assembly tooling for the fuel cell stack as described above. By setting an elastic detection unit 111 on the limiting plate 110 and controlling the screwing robot arm 200 based on the collected pressure information, the pressure state of the electrode 330 can be perceived in real time and uniformly controlled. This avoids deformation of the electrode 330 caused by excessive screwing and prevents increased contact resistance and uneven current distribution caused by excessive looseness. At the same time, the pressure state of the electrode 330 is detected and fed back synchronously by multiple elastic detection units 111, thereby ensuring the balance of pressure on each point of the electrode 330.
[0049] Specifically, the working method includes: S110: Stack the electrode 330 at the assembly station; S120: The stacked electrode sheets 330 are clamped and limited by the limiting plate 110; S130: Place the pressure plate 320 on the stacked electrode sheets 330; S140: The control module controls the screwing robot arm 200 to screw all the screws 310 according to the pressure information of each elastic detection unit 111, so as to complete the assembly of the fuel cell stack 300.
[0050] The control module controls the screwing robot arm 200 to screw all the screws 310 according to the pressure information of each elastic detection unit 111, thus completing the assembly step of the fuel cell stack 300. The control module first controls the screwing robot arm 200 to perform the initial screwing on the screw 310; The initial tightening is completed after all the trigger sensors of the elastic detection units 111 have issued a pressure signal. The control module controls the screwing robot arm 200 to perform secondary screwing on the screw 310, completing the assembly of the fuel cell stack 300.
[0051] In summary, the present invention provides an assembly fixture for fuel cell stacks and its working method. By setting an elastic detection unit 111 on the limiting plate 110 and controlling the screwing robot arm 200 based on the collected pressure information, the real-time sensing and uniform control of the pressure state of the electrode 330 is realized, thereby avoiding deformation of the electrode 330 caused by excessive tightening and preventing increased contact resistance and uneven current distribution caused by excessive loosening. At the same time, the pressure state of the electrode 330 is detected and fed back synchronously by multiple elastic detection units 111, thereby ensuring the balance of pressure on each point of the electrode 330.
[0052] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.
[0053] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.
[0054] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.
[0055] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.
[0056] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An assembly fixture for a fuel cell stack, characterized in that, include: An assembly platform (100) is provided with assembly stations; A screwing robotic arm (200) is disposed on both sides of the assembly platform (100) and is used to screw the screw (310) of the fuel cell stack (300); A control module configured to control a screwing robot arm (200) to screw (310); The assembly station is provided with multiple limiting plates (110) around its perimeter. The top of the limiting plate (110) is provided with an elastic detection part (111). The control module is also configured to control the screwing robot arm (200) to screw all screws (310) based on the pressure information of each elastic detection unit (111) to complete the assembly of the fuel cell stack (300).
2. The assembly tooling for fuel cell stacks as described in claim 1, characterized in that, The limiting plate (110) includes: The main board (112) is clamped, and its side wall has a receiving groove (1121). A rotating plate (113) is rotatably disposed in the receiving groove (1121), and the bottom of the rotating plate (113) is elastically connected to the receiving groove (1121) through a spring plunger (1122); The elastic detection part (111) is disposed in the groove (1131) on the top of the rotating plate (113), and the top of the elastic detection part (111) protrudes from the top of the rotating plate (113).
3. The assembly tooling for the fuel cell stack as described in claim 2, characterized in that, The elastic detection unit (111) includes: A trigger sensor is disposed within the groove (1131); A compression cap (1132) is elastically connected to the groove (1131) by a first return spring (1133); When the screw (310) of the stack (300) is screwed by the screwing robot (200), it drives the pressure plate (320) to squeeze the compression cover (1132). During the descent of the compression cover (1132), the trigger sensor is triggered and sends the pressure information to the control module.
4. The assembly tooling for fuel cell stacks as described in claim 3, characterized in that, The method of controlling the screwing robot arm (200) to screw all screws (310) according to the pressure information of each elastic detection unit (111) completes the assembly of the fuel cell stack (300), that is: The control module first controls the screwing robot arm (200) to perform the initial screwing on the screw (310); The initial tightening is completed after all the trigger sensors of the elastic detection units (111) have issued a pressure signal; The control module controls the screwing robot arm (200) to perform secondary screwing on the screw (310) to complete the assembly of the fuel cell stack (300).
5. The assembly tooling for fuel cell stacks as described in claim 3, characterized in that, The compression cap (1132) includes: The bottom cover (1132a) has a compression groove on its top and its bottom surface is elastically connected to the groove (1131) by a first return spring (1133); The protrusion (1132b) is elastically connected to the bottom of the compression groove by a second return spring; An electric drive locking plate (1134) is hinged to the side wall of the groove (1131) and located below the bottom cover (1132a); The trigger sensor is located at the bottom of the compression tank; After the protrusion (1132b) is fully pressed into the compression groove of the bottom cover (1132a), the bottom surface of the protrusion (1132b) contacts the trigger sensor to trigger the trigger sensor to send down pressure information.
6. The assembly tooling for fuel cell stacks as described in claim 5, characterized in that, The control module controls the screwing robot arm (200) to screw all screws (310) according to the pressure information of each elastic detection unit (111), that is: After receiving the pressure information from all the trigger sensors, the controller controls the electric drive locking plate (1134) to release the limit on the bottom cover (1132a) and controls the screwing robot arm (200) to screw all the screws (310).
7. The assembly tooling for fuel cell stacks as described in claim 3, characterized in that, A strain gauge is provided on the top of the compression cover (1132); After the fuel cell stack (300) is assembled, the control module is further configured to: keep the fuel cell stack (300) stationary for a preset time, acquire stress change information of all strain gauges received during this time, and indicate that the fuel cell stack (300) is not assembled properly when the stress change information exceeds a preset range; when all stress change information is within the preset range, acquire the difference between the maximum stress information and the minimum stress information, and indicate that the fuel cell stack (300) is not assembled properly if the difference is greater than the preset value.
8. The assembly tooling for fuel cell stacks as described in claim 2, characterized in that, The limiting plate (110) also includes: The base (114) has a sliding groove; The clamping motherboard (112) is slidably disposed within the slide groove; The base (114) is equipped with a push rod motor to push the clamping main board (112) to slide along the base (114); Before the control module controls the screwing robot arm (200) to screw the screw (310), the control module is also configured to: The control clamping motherboard (112) retracts inward along the slide to clamp the electrode sheets (330) stacked on the assembly station.
9. A method of operation using the assembly tooling for fuel cell stacks as described in claim 1, characterized in that, The working method includes: The electrode sheets (330) are stacked on the assembly station; The stacked electrode sheets (330) are clamped and limited by the limiting plate (110); Place the pressure plate (320) on the stacked electrode sheets (330); The control module controls the screwing robot (200) to screw all the screws (310) according to the pressure information of each elastic detection unit (111), thus completing the assembly of the fuel cell stack (300).
10. The method of working with the assembly tooling for the fuel cell stack as described in claim 9, characterized in that, The limiting plate (110) includes: The main board (112) is clamped, and its side wall has a receiving groove (1121). A rotating plate (113) is rotatably disposed in the receiving groove (1121), and the bottom of the rotating plate (113) is elastically connected to the receiving groove (1121) through a spring plunger (1122); The elastic detection part (111) is disposed in the groove (1131) at the top of the rotating plate (113), and the top of the elastic detection part (111) protrudes from the top of the rotating plate (113). The elastic detection unit (111) includes: A trigger sensor is disposed within the groove (1131); A compression cap (1132) is elastically connected to the groove (1131) by a first return spring (1133); The control module controls the screwing robot arm (200) to screw all the screws (310) according to the pressure information of each elastic detection unit (111), thus completing the assembly of the fuel cell stack (300). The control module first controls the screwing robot arm (200) to perform the initial screwing on the screw (310); The initial tightening is completed after all the trigger sensors of the elastic detection units (111) have issued a pressure signal; The control module controls the screwing robot arm (200) to perform secondary screwing on the screw (310) to complete the assembly of the fuel cell stack (300).