Stacking device with alignment function for hydrogen fuel cell stack

Abstract

The invention relates to the field of hydrogen fuel cells, in particular to a hydrogen fuel cell stack stacking device with an alignment function. The single battery stacking device is applied to stacking of a plurality of single batteries and comprises a conveying mechanism and a material carrying table capable of moving in the vertical direction, a fixing frame is arranged over the material carrying table, a pair of supporting pieces for supporting the single batteries are arranged on the fixing frame, the supporting pieces can horizontally move on the fixing frame, and an alignment discharging mechanism is further arranged on the fixing frame. The alignment discharging mechanism comprises a downward pressing assembly and limiting plates evenly distributed on the periphery of the fixing frame, and the downward pressing assembly is provided with first linkage pieces matched with the limiting plates and second linkage pieces matched with the supporting pieces. Through linkage cooperation of the first linkage piece and the limiting plate, a centering alignment channel with stacked single batteries as the reference is formed, it is ensured that the single batteries to be stacked are accurately positioned, meanwhile, the supporting piece is driven by the second linkage piece to be stably disengaged, and seamless transition from supporting to limiting is achieved.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen fuel cells, and specifically to a stacking device with a positioning function for a hydrogen fuel cell stack. Background Art

[0002] During the assembly process of a hydrogen fuel cell stack, the alignment accuracy between several single cells directly affects the overall performance and reliability of the stack. The alignment mechanism of existing stacking devices has limited accuracy, and the manual or semi-automatic adjustment methods are inefficient, prone to introducing human errors, and lack a real-time compensation mechanism during the stacking process, making it unable to effectively cope with position offsets caused by component deformation or cumulative errors. It is difficult to ensure stability during the stacking process, affecting the long-term operating performance of the stack.

[0003] A currently publicly disclosed air-cooled stack automatic stacking line for the production of a hydrogen fuel cell stack with the Chinese patent authorization publication number CN119381492B includes a frame and conveyor belts arranged on both sides of a material transfer mechanism. The two conveyor belts are used to alternately transport bipolar plates and electrode plates to the frame; a storage rack for placing the stack is arranged between the two conveyor belts; a material transfer mechanism for transporting electrode plates or bipolar plates is arranged on the frame; the material transfer mechanism includes a support frame fixedly connected to the frame, a driving component, and a pressing component. Support rods extending along the transport direction of the conveyor belt are arranged on both sides of the support frame. Rotating frames are sleeved on both support rods. A plurality of sliding rollers arranged at equal intervals along the axial direction of the support rod are arranged at the bottom of the rotating frame, and the axis of the sliding roller is perpendicular to the axis of the support rod; the driving component is slidably arranged between the two rotating frames in the vertical direction; the pressing component is located below the driving component, and the pressing component is slidably arranged on the support frame in the vertical direction; when the driving component slides in the vertical direction, the driving component will synchronously drive the two rotating frames to rotate away from each other around the axis of the support rod until the electrode plate or bipolar plate located between the two rotating frames falls, and at the same time, the driving component will drive the pressing component below it, and the electrode plate or bipolar plate is pressed by the pressing component sliding in the vertical direction.

[0004] According to the above patent, the patent supports the electrode plate or bipolar plate through a plurality of sliding rollers at the bottom of the rotating frame, and then drives the two rotating frames to move synchronously through the movement of the driving component, so that the electrode plate or bipolar plate between the two rotating frames can naturally fall onto the storage rack, and cooperate with the pressing of the electrode plate or bipolar plate by the pressing component to assist the electrode plate or bipolar plate to stably fall on the storage rack without manual intervention. However, this patent cannot ensure precise positioning in the horizontal direction and correct the placement position after falling, which may affect the stacking accuracy and the stability of the long-term operation of the stack. Therefore, there is currently a need for a hydrogen fuel cell stack stacking device with a high-precision alignment function that can automatically adjust the stacking position during the stacking process. Summary of the Invention

[0005] In view of the problems existing in the prior art, a stacking device with a centering function for a hydrogen fuel cell stack is provided. Through the linkage cooperation between the first linkage and the limiting plate, a centering alignment channel is formed based on the stacked single cells, ensuring the precise positioning of the single cells to be stacked. At the same time, the support is smoothly disengaged by driving the support member through the second linkage, realizing a seamless transition from support to limitation.

[0006] To solve the problems of the prior art, the present invention provides a stacking device with a centering function for a hydrogen fuel cell stack, which is applied to the stacking of a plurality of single cells. The stacking device includes a conveying mechanism and a loading platform capable of moving vertically to stack a plurality of single cells in sequence. A fixed frame is provided directly above the loading platform. A pair of support members for supporting single cells are provided on the fixed frame. The support members can move horizontally on the fixed frame. A centering feeding mechanism is also provided on the fixed frame. The centering feeding mechanism includes a pressing component provided on the fixed frame and limiting plates evenly distributed around the fixed frame. A first linkage cooperating with each limiting plate and a second linkage cooperating with each support member are provided on the pressing component. When the pressing component applies pressure to the single cell, each limiting plate synchronously moves inward under the drive of the corresponding first linkage, gradually forming an alignment channel for centering and limiting the single cell therein. At the same time, each support member gradually disengages from the single cell under the drive of the corresponding second linkage, so that the single cell is precisely stacked on the loading platform along the alignment channel under the action of pressure.

[0007] Preferably, the pressing component includes a movable plate and elastic pressing rods evenly distributed around it. When the elastic pressing rods follow the movement of the movable plate to squeeze the single cell, the elastic pressing rods are in a gradually compressed state, and when the support member completely disengages from the single cell, the elastic pressing rods are in a gradually reset state, so that the single cell is in a pressed state under the elastic force of the elastic pressing rods.

[0008] Preferably, the first linkage is specifically a pressing rod structure fixedly provided on the movable plate and always in contact with the limiting plate. When the first linkage follows the movable plate to squeeze the limiting plate, the limiting plate gradually rotates downward, so that the single cell to be stacked is in an aligned state relative to the stacked single cells.

[0009] Preferably, the second linkage is specifically a connecting rod structure hinged between the movable plate and the support member. When the second linkage follows the movable plate to squeeze the support member, the support member gradually moves outward, so that the single cell can be released from the supported state and be restricted between all the limiting plates.

[0010] Preferably, one end of each limiting plate is rotatably connected to the fixed frame, and the other end extends outward. A torsion spring is provided between each limiting plate and the fixed frame. When the limiting plate is pressed and rotates downward, the torsion spring is in a twisted state.

[0011] Preferably, each limiting plate can contact the edge of the stacked single cell after it rotates into place. When all the limiting plates rotate into place synchronously to form the alignment channel, the single cell to be stacked is in an alignment state based on the stacked single cell, ensuring that the positions of adjacent single cells are consistent.

[0012] Preferably, the inner side of each limiting plate is a rubber surface capable of flexibly contacting the single cell, and the outer side of each limiting plate is a smooth surface capable of slidingly cooperating with the first linkage member.

[0013] Preferably, each support member is composed of a sliding frame and a plurality of balls arranged thereon. A slide rail for slidingly cooperating with the sliding frame is provided on the fixed frame. When the sliding frame moves away from the single cell, the single cell is in a rolling contact state with the sliding frame under the action of the balls.

[0014] Preferably, the elastic pressure rod is composed of an upper rod body and a lower rod body. The upper rod body is fixedly connected to the movable plate. A compression spring is provided between the lower rod body and the upper rod body. A rubber block is provided at the lower end of the lower rod body. When the single cell is conveyed, the rubber block is in a non-contact state with the single cell, and at this time, the compression spring is in a normal state.

[0015] Preferably, a guide post vertically extending upward for guiding the movable plate to move vertically is provided on the fixed frame. The movable plate has a sleeve opening slidably sleeved on the guide post, and a plurality of spheres in rolling contact with the guide post are evenly distributed along the circumferential direction of the sleeve opening.

[0016] The beneficial effects of this application compared with the prior art are as follows:

[0017] 1. Through the linkage cooperation between the first linkage member and the limiting plate, the present invention enables the limiting plates to rotate inward synchronously during the downward movement of the movable plate, forming an alignment channel based on the stacked single cell. At the same time, the support member is driven by the second linkage member to move outward, realizing a smooth transition of the single cell from the supported state to the limited state.

[0018] Under the coordinated action of the limiting plate and the support member, it is ensured that each layer of single cells can be pressed downward by the pressing assembly until stacking is completed after being separated from the support, greatly improving the stacking accuracy and automation degree, reducing manual intervention, and improving the overall consistency and assembly quality of the hydrogen fuel cell stack.

[0019] 2. By the movement of the elastic pressure rod following the movable plate, the elastic pressure rod descends synchronously and is gradually compressed. While the support member separates from the single cell, the reset force of the elastic pressure rod is used to continuously apply a downward pressure, enabling the single cell to still stably fit the alignment channel after being separated from the support, and applying a uniform pressure to the single cell through the rubber block.

[0020] It not only realizes the flexible buffer control during the stacking process of single cells to prevent damage caused by rigid impacts, but also ensures the precise falling of single cells along the alignment channel through the self-adaptive reset of the elastic pressure rod, effectively improving the stability, positioning accuracy, and uniform force distribution during the stacking process.

[0021] 3. In the present invention, the limiting plate rotates under the pressure of the first linkage member and forms a centered alignment channel based on the stacked single cells, ensuring that the single cell to be stacked maintains the same relative position as the lower-layer single cell, achieving precise alignment and improving the repeat positioning accuracy.

[0022] During this process, the smooth surface on the outside of the limiting plate ensures the smoothness and synchronism of the linkage process with the first linkage member, while the rubber surface on the inside realizes flexible contact, avoiding damage to the edges of the single cells and assisting in stable positioning. This improves the consistency of the stack assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention.

[0024] Figure 2 is a partial three-dimensional structural cross-sectional view of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention.

[0025] Figure 3 is a three-dimensional structural schematic of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention, excluding the conveying mechanism Figure 1 .

[0026] Figure 4 is a three-dimensional structural schematic of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention, excluding the conveying mechanism Figure 2 .

[0027] Figure 5 is a plan view of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention in the state where the alignment feeding mechanism is not activated.

[0028] Figure 6 is a partial three-dimensional structural cross-sectional view of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention in the state where the alignment feeding mechanism is not activated.

[0029] Figure 7 is a plan view of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention in the state where the alignment feeding mechanism is activated.

[0030] Figure 8 is a partial three-dimensional structural cross-sectional view of a stacking device with an alignment function for a hydrogen fuel cell stack according to the present invention in the state where the alignment feeding mechanism is activated.

[0031] Figure 9 is a plan sectional view of a single cell of a stacking device with a positioning function of a hydrogen fuel cell stack according to the present invention being stacked Figure 1 .

[0032] Figure 10 is a plan sectional view of a single cell of a stacking device with a positioning function of a hydrogen fuel cell stack according to the present invention being stacked Figure 2 .

[0033] The reference numerals in the figure are: 1, single cell; 2, conveying mechanism; 3, loading platform; 4, fixing frame; 41, slide rail; 42, guiding column; 5, supporting member; 51, sliding frame; 52, ball; 6, pressing-down assembly; 61, first linkage member; 62, second linkage member; 63, movable plate; 631, sphere; 64, elastic pressing rod; 641, upper rod body; 642, lower rod body; 6421, rubber block; 643, compression spring; 7, limiting plate; 71, positioning channel; 72, torsion spring. Detailed implementation manner

[0034] In order to further understand the features, technical means, and specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0035] See Figures 1 - 8 As shown, a stacking device with a positioning function for a hydrogen fuel cell stack is applied to the stacking of a number of single cells 1, and includes a conveying mechanism 2 and a loading platform 3 that can move in the vertical direction for the sequential stacking of a number of single cells 1. A fixing frame 4 is provided directly above the loading platform 3. A pair of supporting members 5 for supporting the single cells 1 are provided on the fixing frame 4. The supporting members 5 can move horizontally on the fixing frame 4. A positioning and feeding mechanism is further provided on the fixing frame 4. The positioning and feeding mechanism includes a pressing-down assembly 6 provided on the fixing frame 4 and limiting plates 7 evenly distributed around the fixing frame 4. The pressing-down assembly 6 is provided with a first linkage member 61 cooperating with each limiting plate 7 and a second linkage member 62 cooperating with each supporting member 5. When the pressing-down assembly 6 applies pressure to the single cell 1, each limiting plate 7 synchronously moves inward under the drive of the corresponding first linkage member 61, gradually forming a positioning channel 71 for the single cell 1 to be centered therein. At the same time, each supporting member 5 gradually disengages from the single cell 1 under the drive of the corresponding second linkage member 62, so that the single cell 1 is accurately stacked on the loading platform 3 along the positioning channel 71 under the action of the pressure.

[0036] The lifting mechanism for driving the movement of the loading platform 3 is not shown in the figure.

[0037] During the alignment stacking process of a hydrogen fuel cell stack, the entire operation process is highly automated and precise, ensuring that each single cell 1 can be stacked in the optimal position and posture. First, several single cells 1 to be stacked are successively fed into the working area of the stacking device by the conveying mechanism 2. The conveying mechanism 2 smoothly transports the single cell 1 to a position directly above the loading platform 3. At this time, the loading platform 3 is at the initial height, waiting to receive the first single cell 1.

[0038] When the single cell 1 reaches the designated position, a pair of horizontally movable support members 5 on the fixing frame 4 provide temporary support for the incoming single cell 1. As the single cell 1 is transferred onto the support members 5, the pressing assembly 6 starts to move downward and applies an appropriate pressure to the single cell 1. At the same time, the first linkage member 61 on the pressing assembly 6 drives the surrounding limiting plates 7 to move inward synchronously, gradually forming a centered alignment channel 71. This ensures that the single cell 1 can be accurately positioned at the center after falling onto the loading platform 3, avoiding deviation or misalignment.

[0039] At the same time, the second linkage member 62 also acts synchronously, driving the two support members 5 to move outward and gradually disengaging from the contact with the single cell 1. After the single cell 1 is completely fixed in position by the limiting plates 7, it no longer relies on the support members 5 for positioning, thus achieving interference-free vertical stacking. When the pressing assembly 6 continues to apply pressure, the single cell 1 accurately falls along the alignment channel 71 and is stacked on the loading platform 3.

[0040] Subsequently, the lifting mechanism is activated to lower the loading platform 3 by a certain distance in the vertical direction, reserving space for the stacking of the next single cell 1. During this process, the accuracy of the position mainly depends on the precise control of the alignment channel 71 and the lifting mechanism. The alignment channel 71 ensures that the single cell 1 falls along a fixed path to the designated position on the loading platform 3, and the lifting mechanism, through precise distance control, keeps the distance of each descent of the loading platform 3 consistent. Thus, an accurate space is reserved for the stacking of the next single cell 1. Since the position of the alignment channel 71 is fixed and the guiding is precise, even when the loading platform 3 performs lifting operations, it will not change the horizontal positioning of the single cell 1. Moreover, the amplitude of each descent is not large, as long as it is ensured that the support members 5 do not affect the single cells 1 already stacked below when supporting the single cell 1 to be stacked. Therefore, the position accuracy of each single cell 1 during stacking can be guaranteed.

[0041] Repeat the above process. The new single cell 1 enters the stacking station again through the conveying mechanism 2, and after going through the same alignment, support release, pressing and stacking steps, it is precisely stacked on top of the previous single cell 1. This process is repeated until all the single cells 1 of the predetermined quantity are stacked completely, forming a complete hydrogen fuel cell stack.

[0042] During the entire stacking process, not only is the production efficiency improved, but also the risk of errors caused by manual intervention is significantly reduced. At the same time, since each single cell 1 has undergone strict position calibration, the finally formed stack structure is tight and has good consistency, providing a good foundation for subsequent processes such as sealing and connection.

[0043] After the stack is completed on the loading table 3, since the single cells 1 have been accurately stacked on the loading table 3 through the alignment channels 71, the stability of the overall stacking structure is ensured. Therefore, to prevent the stack from shifting or being damaged during transfer, the stack is fixed or other protective measures are taken. Subsequently, the entire stack is transferred from the loading table 3 to the next process by a manipulator or manual operation. The equipment for fixing and transferring the stack is not shown in the figure.

[0044] See Figures 1 - 8 As shown, the pressing-down assembly 6 includes a movable plate 63 and elastic pressing rods 64 evenly distributed around it. When the elastic pressing rods 64 follow the movement of the movable plate 63 to press the single cell 1, the elastic pressing rods 64 are in a gradually compressed state, and when the support member 5 completely disengages from the single cell 1, the elastic pressing rods 64 are in a gradually reset state, causing the single cell 1 to be in a pressed-down state under the elastic force of the elastic pressing rods 64.

[0045] The pressing-down driver used to drive the movement of the movable plate 63 is not shown in the figure.

[0046] When the pressing-down driver is activated, it drives the movable plate 63 to move downward, and the elastic pressing rods 64 synchronously descend and contact the surface of the single cell 1. As the movable plate 63 continues to move downward, the elastic pressing rods 64 begin to be under pressure and gradually compress, transmitting the force to the single cell 1 to keep it stable on the support member 5. At this time, the second linkage member 62 acts synchronously, causing the support member 5 to move outward and gradually disengage from the bottom of the single cell 1.

[0047] After the support member 5 completely disengages from the single cell 1, the elastic pressing rods 64 are no longer restricted and begin to slowly reset under their own elastic force to return to their original length. During this process, the elastic pressing rods 64 still contact the top of the single cell 1 and continuously apply a downward force to the single cell 1 by relying on their resilience, ensuring that it accurately falls along the alignment channel 71 formed by the limit plate 7 and finally stacks at the designated position on the loading table 3. The entire pressing-down process achieves stable buffering and release, ensuring the positioning accuracy and uniform force application of the single cell 1 during the stacking process.

[0048] See Figures 3 - 9As shown, the first linkage 61 is specifically a lever structure fixedly arranged on the movable plate 63 and always in contact with the limit plate 7. When the first linkage 61 follows the movable plate 63 to squeeze the limit plate 7, the limit plate 7 gradually rotates downward, making the single battery 1 to be stacked in a state of being aligned relative to the stacked single battery 1.

[0049] When the pressing assembly 6 starts to work, the movable plate 63 moves downward driven by the pressing driver, driving the first linkage 61 to move downward synchronously. During the downward movement, the lever structure continuously applies a force to the limit plate 7. As the movable plate 63 descends, the limit plate 7 gradually rotates downward and moves inward under the push of the lever structure, forming a restraint on the four peripheral edges of the single battery 1.

[0050] The rotation of the limit plate 7 creates a gradually narrowing alignment channel 71 around the single battery 1, guiding the single battery 1 to be stacked to the position directly above the stacked part. Through the dynamic adjustment of the limit plate 7, the single battery 1 of the current layer can be accurately centered and aligned relative to the lower-layer battery, ensuring its stacking position is accurate. During the entire pressing process, the first linkage 61 always remains in contact with the limit plate 7, pushing it to complete the continuous movement from the initial opening to the precise alignment, thus realizing an efficient and stable automatic alignment function.

[0051] See Figures 3 - 8 and Figure 10 As shown, the second linkage 62 is specifically a connecting rod structure hinged between the movable plate 63 and the support 5. When the second linkage 62 follows the movable plate 63 to squeeze the support 5, the support 5 gradually moves outward, enabling the single battery 1 to be released from the supported state and restricted between all the limit plates 7.

[0052] When the pressing assembly 6 starts to work and the movable plate 63 moves downward, the movement of the movable plate 63 is transmitted to the support 5 through the connecting rod structure, forming an outward pushing force. As the movable plate 63 continues to descend, the connecting rod structure drives the two supports 5 to move horizontally to both sides respectively, gradually disengaging from the supporting position at the bottom of the single battery 1.

[0053] During this process, the moving range of the support 5 increases as the movable plate 63 descends until it completely withdraws from below the single battery 1, causing it to lose support and enter the alignment channel 71 formed by the limit plates 7. At this time, the single battery 1 is no longer supported by the support 5 but is surrounded by the limit plates 7 on all sides and its position is accurately defined. The second linkage 62 realizes the controllable release of the supporting state through a coherent mechanical transmission process, ensuring that the single battery 1 enters the stacking position without deviation and completing a smooth transition from support to positioning.

[0054] See Figures 3 - 9As shown, one end of each limiting plate 7 is rotatably connected to the fixing frame 4, and the other end extends outward. A torsion spring 72 is provided between each limiting plate 7 and the fixing frame 4. When the limiting plate 7 is pressed and rotated downward, the torsion spring 72 is in a twisted state.

[0055] When the movable plate 63 drives the first linkage 61 to move downward, the pressing rod structure applies a downward force to the outer extended end of the limiting plate 7, forcing the limiting plate 7 to rotate downward around the rotating shaft. As the limiting plate 7 rotates, the angle between it and the fixing frame 4 gradually decreases, and at the same time, the torsion spring 72 is pushed to twist and store elastic potential energy.

[0056] The rotation process of the limiting plate 7 gradually brings it closer to the periphery of the single cell 1, forming a gradually narrowing alignment channel 71, guiding the single cell 1 to be stacked to the directly above the stacked part and achieving centering positioning. When the stacking of the single cell 1 is completed by the downward pressing action and starts to reset, the torsion spring 72 releases the energy stored before, driving the limiting plate 7 to rotate in the reverse direction and return to the initial open state, preparing for the next stacking. Throughout the process, the limiting plate 7 realizes the automatic reset function through the cooperation with the torsion spring 72, ensuring that the limiting plate 7 is in the standard starting position before each stacking and does not interfere with the feeding of the new single cell 1 to the support member 5.

[0057] See Figures 3 - 9 As shown, each limiting plate 7 can contact the edge of the stacked single cell 1 after it rotates in place. When all the limiting plates 7 rotate in place synchronously to form the alignment channel 71, the single cell 1 to be stacked is in an aligned state with the stacked single cell 1 as the reference, so that the positions between adjacent single cells 1 are kept consistent.

[0058] When the movable plate 63 moves downward to drive the first linkage 61 to push the limiting plate 7 to gradually rotate downward, each limiting plate 7 synchronously moves inward around its rotation connection point with the fixing frame 4 until it rotates to the set position. At this time, the outer extended end of each limiting plate 7 just contacts the edge of the single cell 1 stacked on the loading table 3, and forms a unified alignment reference surface with it. As all the limiting plates 7 complete the rotation synchronously, they jointly enclose a centered and symmetric alignment channel 71, and the central axis of the alignment channel 71 is consistent with the center of the stacked single cells 1.

[0059] After the support member 5 disengages from the single cell 1 to be stacked, the single cell 1 slowly drops along the alignment channel 71 formed by the limiting plates 7 and is accurately aligned with the position of the lower single cell 1 under the guidance of the limiting plates 7. Since the limiting plates 7 are positioned based on the stacked single cells 1, the newly stacked single cell 1 can maintain a relative position with the same height as each layer of the previously stacked single cells 1, ensuring the alignment accuracy and assembly consistency between adjacent single cells 1 in the entire stack, thereby improving the stability and sealing performance of the overall structure.

[0060] See also Figures 3 - 9 As shown, the inner side of each limiting plate 7 is a rubber surface that can flexibly contact the single battery 1 , and the outer side of each limiting plate 7 is a smooth surface that can slidably cooperate with the first linkage member 61 .

[0061] When the pressing assembly 6 is in operation, the elastic pressure rod 64 continuously applies pressure along the smooth outer surface of the limit plate 7 to ensure that the limit plate 7 rotates stably along a predetermined trajectory, thereby ensuring the synchronization and smoothness of its movement. This helps to maintain precise control of the elastic pressure rod 64 in the process of applying force to the limit plate 7, avoiding movement deviation caused by rough or uneven surfaces, thereby ensuring the positioning accuracy of the single battery 1 during the stacking process.

[0062] At the same time, the rubber surface of the limiting plate 7 can achieve flexible contact with the edge of the single battery 1 to avoid damage caused by rigid collision, while providing sufficient friction to assist positioning.

[0063] See also Figures 3 - 8 and Figure 10 As shown, each support member 5 is composed of a sliding frame 51 and a plurality of balls 52 arranged thereon, and a sliding rail 41 is provided on the fixed frame 4 for sliding cooperation with the sliding frame 51. When the sliding frame 51 is away from the single cell 1, the single cell 1 and the sliding frame 51 are in a rolling contact state under the action of the balls 52.

[0064] When the second linkage 62 drives the sliding frame 51 to move outward along the slide rail 41, the support member 5 gradually moves away from the area of ​​the single cell 1. In this process, the ball 52 always keeps in contact with the bottom edge of the single cell 1, and rolls while the sliding frame 51 moves, so that a rolling contact state is formed between the single cell 1 and the support member 5. The friction resistance between the single cell 1 during the transportation of the single cell 1 and the withdrawal of the support member 5 and the single cell 1 is effectively reduced, avoiding damage to its surface.

[0065] See also Figures 3 - 10 As shown, the elastic pressure rod 64 is composed of an upper rod body 641 and a lower rod body 642. The upper rod body 641 is fixedly connected to the movable plate 63. A compression spring 643 is provided between the lower rod body 642 and the upper rod body 641. A rubber block 6421 is provided at the lower end of the lower rod body 642. When the single battery 1 is transported, the rubber block 6421 is in a non-contact state with the single battery 1. At this time, the compression spring 643 is in a normal state.

[0066] When the single cell 1 is conveyed to the support 5, the elastic pressure rod 64 is in the initial state. At this time, the rubber block 6421 maintains a certain distance from the top of the single cell 1 without contact, and the compression spring 643 is also in an uncompressed natural state, which is conducive to the smooth conveyance of the single cell 1 to the support 5.

[0067] As the movable plate 63 starts to move downward, the elastic pressure rod 64 moves downward accordingly. The rubber block 6421 gradually approaches the surface of the single cell 1 and starts to apply pressure to the single cell 1 after contact, while compressing the spring 643 into the compression stage, providing a stable downward pressure and buffer protection for the subsequent stacking process.

[0068] See Figures 3 - 9 As shown, the fixing frame 4 is provided with a guide post 42 extending vertically upward for guiding the movable plate 63 to maintain vertical movement. The movable plate 63 has a socket slidably sleeved on the guide post 42, and a plurality of spheres 631 in rolling contact with the guide post 42 are evenly distributed along the circumferential direction of the socket.

[0069] When the movable plate 63 moves up and down along the guide post 42, the spheres 631 form rolling contact with the surface of the guide post 42, effectively reducing the frictional resistance and ensuring that the movable plate 63 does not shift or shake during operation. This not only improves the smoothness and guiding accuracy of the movement of the movable plate 63, but also enhances the reliability of the entire pressing component 6.

[0070] Through the linkage cooperation between the first linkage 61 and the limit plate 7, the present invention enables the limit plate 7 to rotate synchronously during the downward movement of the movable plate 63, forming a centered alignment channel 71 based on the stacked single cells 1, ensuring the precise positioning of the single cells 1 to be stacked. At the same time, the second linkage 62 is used to drive the support member 5 to smoothly disengage, achieving a seamless transition from support to limit.

[0071] During the process of the single cell 1 falling along the alignment channel 71, by utilizing the compression and reset mechanism of the elastic pressure rod 64, a uniform downward pressure is continuously applied to the single cell 1 after the support member 5 is withdrawn, ensuring its stable fall along the alignment channel 71. The high-precision and highly automated assembly of the hydrogen fuel cell stack stacking process is realized, significantly improving the consistency, stability and production efficiency of the stack.

[0072] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A stacking device with a counterpoint function for a hydrogen fuel cell stack, which is applied to the stacking of a number of single cells (1), and includes a conveying mechanism (2) and a loading platform (3) that can move vertically to stack a number of single cells (1) in sequence; Characterized in that, A fixed frame (4) is provided directly above the loading platform (3). A pair of support members (5) for supporting the single cell (1) are provided on the fixed frame (4). The support members (5) can move horizontally on the fixed frame (4). A counterpoint feeding mechanism is also provided on the fixed frame (4). The counterpoint feeding mechanism includes a pressing component (6) provided on the fixed frame (4) and limiting plates (7) evenly distributed around the fixed frame (4). A first linkage member (61) cooperating with each limiting plate (7) and a second linkage member (62) cooperating with each support member (5) are provided on the pressing component (6); When the pressing component (6) applies pressure to the single cell (1), each limiting plate (7) synchronously moves inward under the drive of the corresponding first linkage member (61), gradually forming a counterpoint channel (71) for centering and limiting the single cell (1). At the same time, each support member (5) gradually disengages from the single cell (1) under the drive of the corresponding second linkage member (62), so that the single cell (1) is accurately stacked on the loading platform (3) along the counterpoint channel (71) under the action of pressure.

2. The stacking device with alignment function for a hydrogen fuel cell stack according to claim 1, characterized in that The pressing component (6) includes a movable plate (63) and elastic pressing rods (64) evenly distributed around it. When the elastic pressing rods (64) follow the movement of the movable plate (63) to squeeze the single cell (1), the elastic pressing rods (64) are in a gradually compressed state. When the support members (5) completely disengage from the single cell (1), the elastic pressing rods (64) are in a gradually reset state, so that the single cell (1) is in a pressed state under the elastic force of the elastic pressing rods (64).

3. The stacking device with alignment function for a hydrogen fuel cell stack according to claim 2, characterized in that, The first linkage member (61) is specifically a lever structure fixedly provided on the movable plate (63) and always in contact with the limiting plate (7). When the first linkage member (61) follows the movable plate (63) to squeeze the limiting plate (7), the limiting plate (7) gradually rotates downward, so that the single cell (1) to be stacked is in a counterpoint state relative to the stacked single cell (1).

4. A stacking device with an alignment function for a hydrogen fuel cell stack according to claim 2, characterized in that: The second linkage member (62) is specifically a connecting rod structure hinged between the movable plate (63) and the support member (5). When the second linkage member (62) follows the movable plate (63) to squeeze the support member (5), the support member (5) gradually moves outward, so that the single cell (1) can be released from the supported state and be restricted between all the limiting plates (7).

5. The stacking device of a hydrogen fuel cell stack with an alignment function according to claim 3, characterized in that: One end of each limiting plate (7) is rotatably connected to the fixed frame (4), and the other end extends outward. A torsion spring (72) is provided between each limiting plate (7) and the fixed frame (4). When the limiting plate (7) is pressed and rotates downward, the torsion spring (72) is in a twisted state.

6. A stacking device with alignment function for a hydrogen fuel cell stack according to claim 5, characterized in that, Each limiting plate (7) can contact the edge of the stacked single battery (1) after it rotates in place. When all the limiting plates (7) rotate in place synchronously to form the alignment channel (71), the single battery (1) to be stacked is in an alignment state with the stacked single battery (1) as the reference, so that the positions between adjacent single batteries (1) are kept consistent.

7. A stacking device with alignment function for a hydrogen fuel cell stack according to claim 6, characterized in that, The inner side of each limiting plate (7) is a rubber surface capable of flexibly contacting the single battery (1), and the outer side of each limiting plate (7) is a smooth surface capable of slidingly cooperating with the first linkage member (61).

8. A stacking device with an alignment function for a hydrogen fuel cell stack according to claim 4, characterized in that: Each support member (5) is composed of a sliding frame (51) and a plurality of balls (52) arranged thereon. A slide rail (41) for slidingly cooperating with the sliding frame (51) is provided on the fixed frame (4). When the sliding frame (51) moves away from the single battery (1), the single battery (1) and the sliding frame (51) are in a rolling contact state under the action of the balls (52).

9. A stacking device for hydrogen fuel cell stacks with an alignment function according to claim 2, characterized in that: The elastic pressure rod (64) is composed of an upper rod body (641) and a lower rod body (642). The upper rod body (641) is fixedly connected to the movable plate (63). A compression spring (643) is provided between the lower rod body (642) and the upper rod body (641). A rubber block (6421) is provided at the lower end of the lower rod body (642). When the single battery (1) is conveyed, the rubber block (6421) and the single battery (1) are in a non-contact state, and at this time the compression spring (643) is in a normal state.

10. A stacking device with an alignment function for a hydrogen fuel cell stack according to claim 2, characterized in that: A guide post (42) vertically extending upward for guiding the movable plate (63) to maintain vertical movement is provided on the fixed frame (4). The movable plate (63) has a sleeve opening slidably sleeved on the guide post (42), and a plurality of spheres (631) in rolling contact with the guide post (42) are evenly distributed along the circumferential direction of the sleeve opening.

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