Electric pile assembly line

Abstract

The invention provides an electric pile assembly line which comprises a preassembling branch line, a material preparation mechanism, a transfer mechanism and a final assembly branch line, the preassembling branch line is adjacent to the final assembly branch line, the material preparation mechanism is arranged at one end of the final assembly branch line, the transfer mechanism is located between the final assembly branch line and the material preparation mechanism, and the material preparation mechanism is used for storing diaphragms, bipolar plates and sealing gaskets. The preassembled branch lines are used for assembling the liquid flow frames, the partition plates and the blankets to form electrodes; the transfer mechanism is used for transferring the diaphragms, the bipolar plates, the sealing gaskets and the electrodes on the adjacent preassembled branch lines to the final assembly branch lines so as to stack the diaphragms, the bipolar plates and the sealing gaskets to form an electric pile. According to the invention, the distances between the transfer mechanism and the material preparation mechanism, the general assembly branch line and the adjacent pre-assembly branch line are equivalent, so that bipolar plates, sealing gaskets and diaphragms on the material preparation mechanism and electrodes on the pre-assembly branch line can be well transferred and stacked on the general assembly branch line to form an electric pile, the space layout is reasonable, the occupied production space is small, the cost is reduced, and the production efficiency is improved. The production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow battery, and particularly relates to a stack assembly line. BACKGROUND

[0002] The stack is the main structure of the flow battery and is composed of a plurality of single cells in series. As shown in the figure, the single cell a of a certain stack comprises a bipolar plate a1, an electrode a2, a gasket a3 and a diaphragm a4, and the order of the single cell a in the stack is the bipolar plate a1, the electrode a2, the gasket a3, the diaphragm a4, the gasket a3, the electrode a2, the bipolar plate a1, and the bipolar plates a1 of the adjacent two single cells a in the stack are shared. In the production process, how to quickly and accurately stack the components is the key to improving the production efficiency and is also the current problem to be solved. Figure 21 SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a stack assembly line which can effectively improve the production efficiency.

[0004] The embodiments of the present application are implemented by the following technical solutions:

[0005] A stack assembly line comprises a pre-assembly branch line, a material preparation mechanism, a transfer mechanism and a final assembly branch line, the pre-assembly branch line is arranged adjacent to the final assembly branch line, the material preparation mechanism is arranged at one end of the final assembly branch line, the transfer mechanism is between the final assembly branch line and the material preparation mechanism, the material preparation mechanism is used for storing diaphragms, bipolar plates and gaskets, the pre-assembly branch line is used for assembling flow frames, partitions and felts to form electrodes, and the transfer mechanism is used for transferring the diaphragms, bipolar plates and gaskets and the electrodes on the adjacent pre-assembly branch line to the final assembly branch line to stack and form a stack. The distance between the transfer mechanism and the material preparation mechanism, the final assembly branch line and the adjacent pre-assembly branch line is relatively small, which can well transfer the bipolar plates, gaskets and diaphragms on the material preparation mechanism and the electrodes on the pre-assembly branch line to the final assembly branch line to stack and form a stack, the space layout is reasonable, the production space is small, the cost is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0006] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0007] Figure 1 The structure schematic diagram of the stack assembly line provided by the embodiments of the present application is shown in the figure.

[0008] ​Figure 2 A perspective view of the feeding mechanism provided for the embodiment of the present application is shown in the figure;

[0009] Figure 3 An assembly structure diagram of the lifting mechanism, the fixed supporting plate and the movable supporting plate provided for the embodiment of the present application is shown in the figure;

[0010] Figure 4 A perspective view of the first lifting mechanism provided for the embodiment of the present application is shown in the figure;

[0011] Figure 5 A perspective view of the first assembling mechanism provided for the embodiment of the present application is shown in the figure;

[0012] Figure 6 An assembly structure diagram of the first dispensing pressure plate, the shaping plate and the reflow line provided for the embodiment of the present application is shown in the figure;

[0013] Figure 7 An explosion structure diagram of the electrode in the embodiment of the present application is shown in the figure;

[0014] Figure 8 A perspective view of the first grabbing assembly provided for the embodiment of the present application is shown in the figure;

[0015] Figure 9 A perspective view of the shaping plate provided for the embodiment of the present application is shown in the figure;

[0016] Figure 10 A perspective view of the jacking mechanism provided for the embodiment of the present application is shown in the figure;

[0017] Figure 11 A perspective view of the first NG mechanism provided for the embodiment of the present application is shown in the figure;

[0018] Figure 12 A perspective view of the overturning mechanism provided for the embodiment of the present application is shown in the figure;

[0019] Figure 13 A perspective view of the Figure 12 A local enlarged diagram of the structure at A in the figure;

[0020] Figure 14 A perspective view of the first dispensing mechanism provided for the embodiment of the present application is shown in the figure;

[0021] Figure 15 A perspective view of the glue detection mechanism provided for the embodiment of the present application is shown in the figure;

[0022] Figure 16 A perspective view of the second assembling mechanism provided for the embodiment of the present application is shown in the figure;

[0023] Figure 17 A perspective view of the third grabbing assembly provided for the embodiment of the present application is shown in the figure;

[0024] Figure 18 A three-dimensional structural schematic view of the overhauling mechanism provided for the embodiment of the present application is shown in the figure;

[0025] Figure 19 A three-dimensional structural schematic view of the overhauling assembly provided for the embodiment of the present application is shown in the figure;

[0026] Figure 20 A three-dimensional structural schematic view of the blanking mechanism provided for the embodiment of the present application is shown in the figure;

[0027] Figure 21 A structural schematic view of the single cell in the embodiment of the present application is shown in the figure;

[0028] Figure 22 An assembly structural schematic view of the second conveying assembly line and the stacking module provided for the embodiment of the present application is shown in the figure;

[0029] Figure 23 An assembly structural schematic view of the second conveying assembly line and the blanking module provided for the embodiment of the present application is shown in the figure;

[0030] Figure 24 A three-dimensional structural schematic view of the stacking jig provided for the embodiment of the present application is shown in the figure.

[0031] Icon: 1, preloaded branch line; 1a, first NG mechanism; 1a1, second rack; 1a2, second gantry structure; 1a3, first visual component; 1a31, assembly plate; 1a32, first linear module; 1a33, adjusting plate; 1a34, slide cylinder; 1a35, CCD camera support; 1a4, first recycling carrier; 1a41, carrier plate; 1a5, second grabbing component; 1b, second NG mechanism; 1c, maintenance mechanism; 1c1, seventh rack; 1c2, sixth gantry structure; 1c3, maintenance component; 1c31, extension plate; 1c32, maintenance base block; 1c33, second wheel frame; 1c34, second roller; 1c35, first wheel frame; 1c36, first roller; 1c37, limiting block; 1c38, displacement sensor; 10, return flow line; 101, first conveying line; 11, feeding mechanism; 111, feeding rack; 1111, feeding space; 1112, first return flow space; 1113, feeding gantry; 1114, feeding gripper; 112, first lifting mechanism; 1121, second main longitudinal frame plate; 1122, second auxiliary longitudinal frame plate; 1123, roller; 1124, first positioning pin; 113, first cart; 1131, fixed support plate; 1132, movable support plate; 1133, baffle; 1134, avoidance slot; 114, lifting mechanism; 1141, first main longitudinal frame plate; 1142, first auxiliary longitudinal frame plate; 1143, extension frame; 1144, top plate; 12, discharging mechanism; 121, eighth rack; 122, second lifting mechanism; 13, first assembly mechanism; 131, first rack; 132, first dispensing pressure plate; 1321, avoidance hole; 133, first dispensing component; 134, first grabbing component; 1341, first hanging frame; 1342, first base plate; 13421, first driving cylinder; 1343, first support plate; 13431, assembly block; 13432, second guide column; 134321, square shaft section; 13433, buffer spring; 13434, pressure maintaining block; 134341, guide square hole; 1344, connecting plate; 1345, first guide column; 1346, grabbing suction cup; 135, first gantry structure; 136, shaping plate; 1360, shaping plane; 1361, width limiting block; 1362, length limiting block; 14, overturning mechanism; 141, third rack; 1411, third base plate; 1412, overturning mounting plate; 1413, fourth guide column; 1414, overturning seat; 1415, overturning plate; 1416, clamping jaw head; 1417, clamping jaw cylinder; 15, first dispensing mechanism; 151, fourth rack; 152, second dispensing plate; 1521, dispensing hole; 153, third gantry structure; 154, second dispensing component; 16, glue detection mechanism; 161, fifth rack; 162, detection pressure plate; 163, second visual component; 164, fourth gantry structure; 17, second assembly mechanism; 171, sixth rack; 172, fifth gantry structure;173、third grabbing assembly; 1731, second hanger; 1732, fourth base plate; 1733, fifth guide column; 1734, return spring; 1735, first grabbing plate; 1736, second grabbing plate; 17361, needle type suction cup; 1737, second driving cylinder; 1738, sixth guide column; 174, buffer area; 175, assembly area; 18, conveying jig; 181, positioning hole; 182, avoiding notch; 19, jacking mechanism; 191, second base plate; 192, jacking plate; 1921, second positioning pin; 2, general assembly branch line; 21, second conveying flow line; 22, stacking jig; 221, bottom support plate; 222, support plate; 223, bearing block; 224, limiting column; 23, stacking module; 231, stacking rack; 232, lifting suspension; 24, blanking module; 241, blanking rack; 2411, rotating shaft; 242, turnover frame; 2421, first frame plate; 24211, jig limiting head; 2422, second frame plate; 3, material preparation mechanism; 31, first material preparation mechanism; 32, second material preparation mechanism; 4, transfer mechanism; 5, electric pile; a, single battery; a1, bipolar plate; a2, electrode;

[0032] a21, liquid flow frame; a211, modeling groove; a212, assembly hole; a22, partition plate; a23, carbon felt; a3, sealing gasket; a4, diaphragm. DETAILED DESCRIPTION

[0033] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing specific embodiments only and is not intended to be limiting of the present application.

[0035] Please refer to Figures 1 to 24The application discloses a stack assembly line, which comprises a pre-assembly branch line 1, a material preparation mechanism 3, a transfer mechanism 4 and a general assembly branch line 2, wherein the pre-assembly branch line 1 is arranged adjacent to the general assembly branch line 2, the material preparation mechanism 3 is arranged at one end of the general assembly branch line 2, and the transfer mechanism 4 is arranged between the general assembly branch line 2 and the material preparation mechanism 3; the material preparation mechanism 3 is used for storing a diaphragm a4, a bipolar plate a1 and a sealing pad a3; the pre-assembly branch line 1 is used for assembling a liquid flow frame a21, a partition plate a22 and a blanket to form an electrode a2; and the transfer mechanism 4 is used for transferring the diaphragm a4, the bipolar plate a1 and the sealing pad a3 and the electrode a2 on the adjacent pre-assembly branch line 1 to the general assembly branch line 2 to stack and form a stack 5. Figure 1 In the embodiment, the electrode a2 comprises a positive electrode and a negative electrode during the assembly process, therefore two pre-assembly branch lines 1 are arranged, the general assembly branch line 2 is arranged between the two pre-assembly branch lines 1, and the two pre-assembly branch lines 1 are identical in structure and are respectively used for pre-assembling the positive electrode and the negative electrode.

[0036] In the embodiment, as shown in Figure 1 , the material preparation mechanism 3 comprises a first material preparation mechanism 31 and a second material preparation mechanism 32, the first material preparation mechanism 31 is used for placing the bipolar plate a1, and the second material preparation mechanism 32 is used for placing the sealing pad a3 and the diaphragm a4.

[0037] In the embodiment, one of the pre-assembly branch lines 1 is taken as an example for description.

[0038] As shown in Figure 1As shown, the preloaded branch line 1 includes a conveying jig 18, a feeding mechanism 11, a reflow line 10 and a discharging mechanism 12, the conveying jig 18 reciprocates between the feeding mechanism 11 and the discharging mechanism 12 through the reflow line 10, and the conveying jig 18 is used to convey the electrode a2; between the feeding mechanism 11 and the discharging mechanism 12, a first assembly mechanism 13, a first NG mechanism la, a turnover mechanism 14, a first dispensing mechanism 15, a glue detection mechanism 16, a second NG mechanism lb, a second assembly mechanism 17 and a maintenance mechanism lc are sequentially arranged in the conveying direction of the reflow line 10, wherein the first assembly mechanism 13 is arranged close to the feeding mechanism 11, and the maintenance mechanism lc is arranged close to the discharging mechanism 12. In the embodiment, the reflow line 10 has a double-layer structure, including a conveying support (not shown in the figure), and two first conveying flow lines 101 are arranged on the conveying support in the vertical direction, the first conveying flow line 101 on the upper side is used to convey the conveying jig 18 from the feeding mechanism 11 to the discharging mechanism 12, and the first conveying flow line 101 on the lower side is used to convey the conveying jig 18 from the discharging mechanism 12 to the feeding mechanism 11. In the embodiment, the conveying direction of the reflow line 10 mentioned above refers to the direction in which the feeding mechanism 11 points to the discharging mechanism 12, that is, the first conveying flow line 101 on the upper side is used for feeding, and the first conveying flow line 101 on the lower side is used for reflow conveying jig 18 for recycling. In the embodiment, the liquid flow frame a21 and the partition plate a22 are precisely assembled by the first assembly mechanism 13, and the liquid flow frame a21 and the carbon felt a23 are precisely assembled by the second assembly mechanism 17, and in the conveying direction of the liquid flow frame a21, by configuring the NG mechanism and the detection and maintenance mechanism lc, unqualified products can be repaired or rejected, which is beneficial to improve the production rhythm and ensure the product yield.

[0039] As Figure 2As shown, the feeding mechanism 11 comprises a feeding rack 111, and the feeding rack 111 is provided with a feeding space 1111 and a first backflow space 1112. The first backflow space 1112 is provided with a first lifting mechanism 112, which is used to transfer the conveying jig 18 from the lower first conveying line 101 to the upper first conveying line 101. In this embodiment, the end of the first conveying line 101 extends to the first lifting mechanism 112. After the conveying jig 18 flows back from the lower first conveying line 101 to the first lifting mechanism 112, the conveying jig 18 is lifted by the first lifting mechanism 112 and transferred to the upper first conveying line 101. The liquid flow frame a21 is stored in the feeding space 1111 by the first trolley 113. Specifically, the first backflow space 1112 is arranged adjacent to the feeding space 1111. The feeding rack 111 is provided with a feeding gantry 1113, and the feeding gantry 1113 is provided with a feeding gripper 1114. Under the action of the feeding gantry 1113, the feeding gripper 1114 transfers the liquid flow frame a21 in the feeding space 1111 to the conveying jig 18 in the first backflow space 1112. In this embodiment, the feeding gripper 1114 uses a negative pressure adsorption method to grasp the liquid flow frame a21. The structure and working principle of the feeding gripper 1114 are prior art, and will not be described here.

[0040] As shown in Figure 2 and Figure 3 The first trolley 113 is provided with a fixed supporting plate 1131, and the upper side of the fixed supporting plate 1131 is provided with a plurality of vertical upward extending retaining edges 1133. The plurality of retaining edges 1133 are combined to limit the liquid flow frame a21. The upper side of the fixed supporting plate 1131 is provided with a movable supporting plate 1132, and the liquid flow frame a21 is stacked on the movable supporting plate 1132. Further, the feeding space 1111 is also provided with a lifting mechanism 114, which is used to lift the movable supporting plate 1132 to keep the height of the uppermost liquid flow frame a21 consistent in the vertical direction, so as to facilitate the feeding gripper 1114 to quickly and accurately take the material.

[0041] The lifting mechanism 114 comprises a first main longitudinal frame plate 1141 arranged on the feeding frame 111, and the first main longitudinal frame plate 1141 is arranged with a first auxiliary longitudinal frame plate 1142 in the vertical direction, and the first auxiliary longitudinal frame plate 1142 is arranged with an extension frame 1143, and the extension frame 1143 is arranged with a top plate 1144, and the fixed supporting plate 1131 is arranged with a through avoiding slot hole 1134 corresponding to the top plate 1144, and the top plate 1144 can pass through the avoiding slot hole 1134 to abut to the movable supporting plate 1132. Optionally, the first auxiliary longitudinal frame plate 1142 is slidably connected with the first main longitudinal frame plate 1141 through a slide rail sliding block assembly, and is driven to slide in the vertical direction through a linear module installed on the first main longitudinal frame plate 1141. In this way, the movable supporting plate 1132 can be driven to move in the longitudinal direction by the top plate 1144, so as to keep the uppermost liquid flow frame a21 stacked on the movable supporting plate 1132 at a certain vertical height.

[0042] As shown in Figure 4 The first lifting mechanism 112 comprises a second main longitudinal frame plate 1121 arranged on the feeding frame 111, and the second main longitudinal frame plate 1121 is slidably arranged with a second auxiliary longitudinal frame plate 1122 in the vertical direction through a slide rail sliding block assembly. Optionally, the second auxiliary longitudinal frame plate 1122 is driven through a chain structure arranged on the second main longitudinal frame plate 1121, and in another embodiment, a pneumatic cylinder or a linear module can also be arranged on the second main longitudinal frame plate 1121 to drive the second auxiliary longitudinal frame plate 1122.

[0043] In order to facilitate the smooth transition of the conveying jig 18 between the first conveying assembly line 101 and the first lifting mechanism 112, a plurality of rollers 1123 are rotatably arranged on the second auxiliary longitudinal frame plate 1122. Further, the plurality of rollers 1123 are arranged at intervals. In some embodiments, the second auxiliary longitudinal frame plate 1122 is provided with a first positioning pin 1124, and the first positioning pin 1124 is connected with the second auxiliary longitudinal frame plate 1122 through a pneumatic cylinder (not shown in the figure) arranged on the second auxiliary longitudinal frame plate 1122, and the first positioning pin 1124 can extend upward through the gap between two adjacent rollers 1123 under the action of the pneumatic cylinder. It can be understood that correspondingly, the conveying jig 18 is provided with a positioning hole 181 corresponding to the first positioning pin 1124, so as to ensure the stability of the conveying jig 18 in the vertical direction.

[0044] As shown in Figure 5As shown, the first assembly mechanism 13 includes a first frame 131, on which a first dispensing pressure plate 132 is disposed; a return line 10 passes through the first frame 131; when the conveying fixture 18 on the return line 10 is in the first assembly mechanism 13, the conveying fixture 18 is below the first dispensing pressure plate 132, and a liquid flow frame a21 is mounted on the conveying fixture 18; a first dispensing assembly 133 and a first gripping assembly 134 are also adjustablely mounted on the first frame 131; the first dispensing assembly 133 is used to dispense adhesive onto the liquid flow frame a21, and the first gripping assembly 134 is used to grip the partition a22 and attach the partition a22 to the liquid flow frame a21; a clearance hole 1321 is provided through the first dispensing pressure plate 132 for the partition a22 to pass through. Figure 5 As shown, the first dispensing assembly 133 and the first gripping assembly 134 are both adjustablely mounted on the top of the first frame 131 via the first gantry structure 135. The first dispensing assembly 133 can be any existing dispensing mechanism, which is not limited here. It is used to dispense adhesive to the corresponding area of ​​the liquid flow frame a21 so that the liquid flow frame a21 can be bonded to the partition a22.

[0045] like Figure 7 The diagram shows the exploded structure of electrode a2. Specifically, the upper side of the liquid flow frame a21 is provided with a molding groove a211 for assembling the partition a22, and the shape of the partition a22 is adapted to the shape of the molding groove a211. As mentioned above, the first dispensing assembly 133 is used to dispense adhesive onto the bottom inner side of the molding groove a211, and the first gripping assembly 134 is used to grip the partition a22 and assemble it into the molding groove a211.

[0046] In use, the first dispensing plate 132 works with the conveying fixture 18 to position and flatten the liquid flow frame a21. The molding groove a211 is exposed upward through the clearance hole 1321 to facilitate the operation of the first dispensing assembly 133. At the same time, it is convenient for the first gripping assembly 134 to smoothly assemble the partition a22 into the molding groove a211, ensuring the assembly accuracy of the partition a22 and the liquid flow frame a21.

[0047] In this embodiment, the storage of the partition a22 is the same as that of the liquid flow frame a21 described above. The first gripping component 134 is fed by the first trolley 113 and the lifting mechanism 114, which will not be described again here.

[0048] like Figure 8As shown, the first grabbing assembly 134 comprises a first hanger 1341 mounted on a first gantry structure 135 arranged on the first rack 131, and the bottom of the first hanger 1341 is provided with a first base plate 1342, and the first base plate 1342 is configured with a first guide column 1345 extending in the vertical direction, the first guide column 1345 penetrates through the first base plate 1342 and is slidably connected with the first base plate 1342 through a linear bearing, the upper end of the first guide column 1345 is configured with a connecting plate 1344, and the lower end of the first guide column 1345 is configured with a first supporting plate 1343, and the first base plate 1342 is configured with a first driving cylinder 13421, and the first driving cylinder 13421 acts on the connecting plate 1344 to enable it to move in the vertical direction. A plurality of grabbing suction cups 1346 are arranged on the first supporting plate 1343 to adsorb and grab the partition plate a22 by negative pressure. In the embodiment, a plurality of first guide columns 1345 share one connecting plate 1344 to link a plurality of first guide columns 1345 to drive the first supporting plate 1343.

[0049] Further, the first supporting plate 1343 is provided with an assembling block 13431, the first supporting plate 1343 is between the assembling block 13431 and the first base plate 1342, the assembling block 13431 is provided with a second guide column 13432 extending downward along the vertical direction, the second guide column 13432 is provided with a buffer spring 13433 and a pressure maintaining block 13434, the buffer spring 13433 is between the pressure maintaining block 13434 and the assembling block 13431. In the embodiment, the pressure maintaining block 13434 is provided with a guide square hole 134341, the second guide column 13432 is provided with a square shaft section 134321 matched with the guide square hole 134341, so that the pressure maintaining block 13434 can move along the vertical direction within the range of the square shaft section 134321. Further, the lower side of the pressure maintaining block 13434 is provided with a buffer hole coaxially communicated with the guide square hole 134341, the buffer hole is provided with an anti-falling screw (not shown in the figure) connected to the lower end of the second guide column 13432, so as to prevent the pressure maintaining block 13434 from being separated from the second guide column 13432. Since there is inevitably a gap between the stacked partition plates a22, the pressure maintaining block 13434 is provided to contact and press the partition plates a22 before the suction cups 1346 contact the partition plates a22, in this process, the pressure maintaining block 13434 moves upward relative to the second guide column 13432 and compresses the buffer spring 13433, which is beneficial to the full adhesion of the suction cups 1346 and the partition plates a22. In use, the first hanger 1341 can move in the horizontal direction and the vertical direction through the linear module provided on the first gantry structure 135, the first gantry structure 135 itself can move in the horizontal direction, it should be noted that the horizontal movement direction of the first gantry structure 135 itself is perpendicular to the horizontal movement direction of the linear module driving the first hanger 1341, so as to realize the movement of the first hanger 1341 in the three-dimensional space.

[0050] Similarly, the first dispensing assembly 133 can also move in the three-dimensional space through the above structure, that is, the first hanger 1341 is replaced by the first dispensing assembly 133.

[0051] As Figure 6 and Figure 9As shown, the first dispensing pressing plate 132 is adjustably provided with a shaping plate 136 along the width direction of the partition a22, the shaping plate 136 is provided with a shaping plane 1360 for bearing the partition a22, the shaping plate 136 is provided with a width limiting block 1361 on both sides of the partition a22 in the width direction, and is provided with a length limiting block 1362 on both sides of the partition a22 in the length direction, and the width limiting block 1361, the length limiting block 1362 and the shaping plane 1360 constitute a positioning space of the partition a22. Optionally, the shaping plate 136 is slidably connected with the first dispensing pressing plate 132 through a slide rail and slide block assembly, and is driven by a gas cylinder provided on the first dispensing pressing plate 132 to slide relative to the first dispensing pressing plate 132. In the embodiment, the width limiting block 1361 and the length limiting block 1362 are driven by gas cylinders provided on the shaping plate 136 and corresponding to the limiting blocks. In use, after the first grabbing assembly 134 grabs the partition a22 to run above the avoiding hole 1321, the shaping plate 136 moves to the area between the partition a22 and the avoiding hole 1321, the first grabbing assembly 134 places the partition a22 in the positioning space, specifically, places the partition a22 on the shaping plane 1360, repositions the partition a22 through the joint action of the length limiting block 1362 and the width limiting block 1361, resets the length limiting block 1362 and the width limiting block 1361, then the first grabbing assembly 134 grabs the partition a22 to make it separate from the shaping plane 1360, then the shaping plate 136 is reset to expose the avoiding hole 1321, and finally the partition a22 is attached to the liquid flow frame a21 through the avoiding hole 1321. In this way, the assembly precision of the partition a22 on the liquid flow frame a21 is ensured.

[0052] It should be noted that the conveying support is provided with a jacking mechanism 19 for driving the conveying jig 18 to separate from the first conveying assembly line 101 in the vertical direction. Specifically, the jacking mechanism 19 is arranged at the corresponding station of the first assembly mechanism 13, the first NG mechanism 1a, the turnover mechanism 14, the first dispensing mechanism 15, the glue detection mechanism 16, the second assembly mechanism 17 and the maintenance mechanism 1c.

[0053] As shown in Figure 10 The jacking mechanism 19 includes a second base plate 191 and a jacking plate 192, the second base plate 191 is fixedly installed on the conveying support, the jacking plate 192 is provided with a third guide column extending in the vertical direction, the third guide column penetrates through the second base plate 191 and is slidably connected with the second base plate 191 through a linear bearing. The jacking plate 192 is driven by a gas cylinder provided on the second base plate 191 so that the jacking plate 192 can move in the vertical direction. In the embodiment, the jacking plate 192 is provided with a second positioning pin 1921, which is matched with the positioning hole 181 on the conveying jig 18. In this way, the stability of the conveying jig 18 during jacking can be ensured.

[0054] In the first assembly mechanism 13, the lifting plate 192 can drive the conveying fixture 18 to move vertically toward the first point glue plate 132 to disengage from the first conveying line 101, and cooperate with the first point glue plate 132 to press the positioning liquid flow frame a21.

[0055] like Figure 11 As shown, the first NG mechanism 1a includes a second frame 1a1, through which the return line 10 passes to transport the conveying fixture 18 to the workstation of the first NG mechanism 1a. A second gantry structure 1a2 is configured on the second frame 1a1. A second gripping assembly 1a5 is adjustable in the vertical direction on the gantry beam of the second gantry structure 1a2 for gripping the combination of the fluid flow frame a21 and the partition plate a22 on the conveying fixture 18. In some embodiments, the second gripping assembly 1a5 has the same structure as the first gripping assembly 134, and the second gripping assembly 1a5 may not be equipped with the pressure holding block 13434.

[0056] In this embodiment, a first vision component 1a3 is disposed on the second gripping component 1a5. The first vision component 1a3 includes an assembly plate 1a31 disposed on the second gripping component 1a5. An adjustment plate 1a33 is adjustablely disposed on the assembly plate 1a31 via a first linear module 1a32. A CCD camera bracket 1a35 is mounted on the adjustment plate 1a33 for mounting a CCD camera. In this embodiment, the adjustment plate 1a33 and the CCD camera bracket 1a35 are connected by a slide cylinder 1a34, so that the height of the CCD camera bracket 1a35 can be adjusted in the vertical direction. Figure 11 As shown, this configuration enables the CCD camera bracket 1a35, i.e., the CCD camera, to be positioned in three-dimensional space, thereby allowing for effective detection of the assembly consisting of the fluid flow frame a21 and the partition a22. In use, qualified assemblies are transported to the next station via the conveying fixture 18, while unqualified assemblies are gripped and recycled by the second gripping component 1a5. In this embodiment, the first NG mechanism 1a further includes a first recycling carrier 1a4, which includes a second trolley with a carrier plate 1a41 for carrying unqualified assemblies.

[0057] like Figure 12As shown, the turnover mechanism 14 comprises a third frame 141, the return flow line 10 passes through the third frame 141, and the third frame 141 is provided with a lifting turnover assembly at both ends in the width direction of the return flow line 10. The lifting turnover assembly comprises a third base plate 1411 fixedly installed on the third frame 141, and a turnover mounting plate 1412 is arranged on the upper side of the third base plate 1411. A plurality of fourth guide columns 1413 are arranged on the turnover mounting plate 1412, extend in the vertical direction, and penetrate through the third base plate 1411. The fourth guide columns 1413 are slidably connected to the third base plate 1411 through linear bearings, and a cylinder for driving the turnover mounting plate 1412 to move in the vertical direction is arranged on the third base plate 1411. Further, a turnover seat 1414 is adjustably arranged on the turnover mounting plate 1412 in the width direction of the return flow line 10. Specifically, the turnover seat 1414 is slidably connected to the turnover mounting plate 1412 through a slide rail sliding block assembly, and is driven by a cylinder arranged on the turnover mounting plate 1412. As shown in Figure 12 and Figure 13 As shown, a turnover plate 1415 is rotatably installed on the turnover seat 1414 and is driven to rotate by a motor arranged on the turnover seat 1414. Two clamping jaw heads 1416 are slidably installed on the turnover plate 1415 through a slide rail sliding block assembly, and are driven by a clamping jaw cylinder 1417 arranged on the turnover plate 1415 to clamp the assembly on the conveying jig 18.

[0058] It should be noted that the conveying jig 18 is provided with a relief gap 182 for accommodating the clamping jaw head 1416. In use, the jacking mechanism 19 at the turnover mechanism 14 jacks up the conveying jig 18 to disengage from the first conveying line 101, and then the turnover mounting plate 1412 moves downward in the vertical direction so that the assembly is between the two clamping jaw heads 1416. The turnover seat 1414 is driven to move in the width direction of the return flow line 10, i.e., the width direction of the first conveying line 101, so that the clamping jaw heads 1416 approach and can clamp the assembly of the liquid flow frame a21 and the partition a22 in the relief gap 182. The clamping jaw cylinder 1417 acts on the clamping jaw head 1416 to clamp the assembly. Then the turnover mounting plate 1412 moves upward in the vertical direction to disengage the assembly from the conveying jig 18, and enough turnover space is reserved. Finally, the turnover plate 1415 is turned over by 180° to put the assembly back to the conveying jig 18, and the turnover mounting plate 1412 and the turnover seat 1414 are reset.

[0059] As shown in Figure 14As shown, the first dispensing mechanism 15 includes a fourth rack 151, the reflow line 10 passes through the fourth rack 151, and a second dispensing plate 152 is arranged on the fourth rack 151. The second dispensing plate 152 is provided with dispensing holes 1521, and a second dispensing assembly 154 is arranged on the fourth rack 151 through a third gantry structure 153. In some embodiments, the first dispensing assembly 133 and the second dispensing assembly 154 have the same structure, which will not be described here. The sealant on the back side of the liquid flow frame a21 is used for sealing and bonding between two adjacent electrodes a2 during the stack of the battery. It should be noted that, in use, the lifting mechanism 19 arranged at the first dispensing mechanism 15 lifts the conveying jig 18 to separate from the reflow line 10, and the conveying jig 18 cooperates with the second dispensing plate 152 to press the flat liquid flow frame a21, so as to ensure the dispensing accuracy of the liquid flow frame a21 on the back side.

[0060] As shown in Figure 15 , the glue detection mechanism 16 includes a fifth rack 161, the reflow line 10 passes through the fifth rack 161, and a detection pressing plate 162 is arranged on the fifth rack 161. In this embodiment, the structure of the detection pressing plate 162 is the same as that of the second dispensing plate 152. In use, the lifting mechanism 19 at the glue detection mechanism 16 lifts the conveying jig 18 in the vertical direction to separate from the reflow line 10, and the conveying jig 18 cooperates with the detection pressing plate 162 to press and fix the liquid flow frame a21, so as to facilitate detection. The glue detection mechanism 16 further includes a second vision assembly 163 adjustably arranged on the fifth rack 161 through a fourth gantry structure 164. Optionally, the second vision assembly 163 is a CCD camera.

[0061] Optionally, the second NG mechanism 1b refers to the first NG mechanism 1a, except that since detection has been performed by the glue detection mechanism 16 in front of the second NG mechanism 1b, the first vision assembly 1a3 does not need to be arranged in the second NG mechanism 1b.

[0062] As shown in Figure 16 , the second assembly mechanism 17 includes a sixth rack 171, the sixth rack 171 is provided with an assembly area 175 and a buffer area 174, and the reflow line 10 is located in the buffer area. The sixth rack 171 is provided with a fifth gantry structure 172, and a third grabbing assembly 173 is arranged on the fifth gantry structure 172. The third grabbing assembly 173 is adjustably arranged on the sixth rack 171 through the fifth gantry structure 172, and can reciprocate between the assembly area 175 and the buffer area 174. The third grabbing assembly 173 can grab the carbon felt a23 in the buffer area 174 and transfer it to the assembly area 175 to assemble with the combination of the liquid flow frame a21 and the partition plate a22 to form the electrode a2.

[0063] Further, as shown in Figure 17As shown, the third grabbing assembly 173 comprises a second hanger 1731 assembled on the fifth gantry structure 172, and a fourth base plate 1732 is arranged at the lower end of the second hanger 1731. A first grabbing plate 1735 and a second grabbing plate 1736 are sequentially arranged at the lower side of the fourth base plate 1732. A fifth guide column 1733 extending upward in the vertical direction is arranged on the first grabbing plate 1735, and the fifth guide column 1733 penetrates through the fourth base plate 1732 and is connected with the fourth base plate 1732 through a linear bearing in a sliding mode. It can be understood that the upper end of the fifth guide column 1733 is provided with a limiting step or a limiting baffle to prevent the first grabbing plate 1735 and the second grabbing plate 1736 from being separated from the fourth base plate 1732 under the action of gravity. Further, the fifth guide column 1733 is sleeved with a reset spring 1734, and the reset spring 1734 is arranged between the fourth base plate 1732 and the first grabbing plate 1735. A second driving cylinder 1737 is arranged on the first grabbing plate 1735, and a sixth guide column 1738 extending in the vertical direction is arranged on the second grabbing plate 1736. The sixth guide column 1738 penetrates through the first grabbing plate 1735 and is connected with the first grabbing plate 1735 through a linear bearing in a sliding mode. Correspondingly, the upper end of the sixth guide column 1738 is provided with a limiting step or a limiting baffle, which is the same as the fifth guide column 1733. In the embodiment, the second driving cylinder 1737 acts on the second grabbing plate 1736, so that the second grabbing plate 1736 can move close to or away from the first grabbing plate 1735 in the vertical direction. In order to successfully grab the carbon felt a23, a plurality of needle suction cups 17361 are arranged on the second grabbing plate 1736.

[0064] Optionally, the feeding device of the carbon felt a23 refers to the first trolley 113 and the lifting mechanism 114 in the feeding mechanism 11, so that the uppermost carbon felt a23 maintains the same vertical height, which is convenient for taking the material. Correspondingly, the space range surrounded by the flange 1133 is used to limit the carbon felt a23, and details are not described herein.

[0065] As shown in the figure, Figure 7 The liquid flow frame a21 is provided with an assembly hole a212 for accommodating the carbon felt a23.

[0066] In use, the fifth gantry structure 172 drives the third grabbing assembly 173 to move to the buffer area 174, grabs the carbon felt a23, and then moves to the assembly area 175. The second hanger 1731 moves downward in the vertical direction to assemble the carbon felt a23 in the assembly hole a212. At this time, the second hanger 1731 maintains the vertical direction height, the second driving cylinder 1737 is elongated, at this time, the first grabbing plate 1735 moves upward in the vertical direction and compresses the return spring 1734. This process can ensure that the first grabbing plate 1735 exerts a certain pressing force on the carbon felt a23, so as to ensure that the carbon felt a23 can be embedded in the assembly hole a212. Then, the second driving cylinder 1737 resets, the second hanger 1731 moves upward in the vertical direction to make the third grabbing assembly 173 separate from the carbon felt a23, that is, the assembly of the carbon felt a23 on the liquid flow frame a21 is completed, and thus the assembly of the liquid flow frame a21, the partition plate a22 and the carbon felt a23 is realized, and the electrode a2 is formed.

[0067] It should be noted that the movement of the second hanger 1731 in the width direction of the fifth gantry structure 172 and in the vertical direction is realized by a linear module installed on the fifth gantry structure 172.

[0068] As shown in Figure 18 The maintenance mechanism 1c includes a seventh rack 1c1 and a maintenance assembly 1c3. The return flow line 10 passes through the seventh rack 1c1, and the maintenance assembly 1c3 is adjustably installed on the seventh rack 1c1 through the sixth gantry structure 1c2. Figure 19As shown, the maintenance assembly 1c3 comprises an extension plate 1c31, the extension plate 1c31 is adjustably assembled to the sixth gantry structure 1c2 through a linear module along the width direction of the sixth gantry structure 1c2, a maintenance base block 1c32 is adjustably arranged on the extension plate 1c31 in the vertical direction, a reference wheel set and a maintenance wheel set are arranged on the maintenance base block 1c32, wherein the maintenance wheel set comprises a first wheel frame 1c35 and a limiting stopper 1c37, the limiting stopper 1c37 is fixedly installed on the maintenance base block 1c32, the first wheel frame 1c35 is slidingly installed on the maintenance base block 1c32 in the vertical direction through a slide rail sliding block assembly, the limiting stopper 1c37 is above the first wheel frame 1c35, and a displacement sensor 1c38 is arranged between the first wheel frame 1c35 and the limiting stopper 1c37. The reference wheel set comprises a second wheel frame 1c33, the second wheel frame 1c33 is installed on the maintenance base block 1c32, a second roller 1c34 is rotatably installed on the second wheel frame 1c33, and a first roller 1c36 is rotatably installed on the first wheel frame 1c35. In use, the second roller 1c34 abuts against the liquid flow frame a21, the first roller 1c36 moves along the profile of the assembly hole a212, the second roller 1c34 serves as a reference, if the carbon felt a23 is successfully assembled into the assembly hole a212, the first roller 1c36 does not change in height in the vertical direction or floats within the allowable stroke range, which proves that the carbon felt a23 is assembled qualifiedly, for the carbon felt a23 structure that does not enter the assembly hole a212, the first roller 1c36 can press it into the assembly hole a212 during the detection process, which is beneficial to improve the yield, and for the carbon felt a23 that cannot be repaired, that is, most of the carbon felt a23 does not embed into the assembly hole a212 and still overlaps on the edge of the assembly hole a212 under the action of the first roller 1c36, at this time, due to the thickness of the carbon felt a23 and the liquid flow frame a21, the first roller 1c36 moves upward along with the first wheel frame 1c35 in the vertical direction, so that the displacement sensor 1c38 detects this phenomenon, which indicates that the current carbon felt a23 is unqualified, prompting NG product or manual adjustment.

[0069] Optionally, the maintenance base block 1c32 is slidingly connected with the extension plate 1c31 through a slide rail sliding block assembly and is driven by a cylinder arranged on the extension plate 1c31.

[0070] As shown in Figure 20 , the blanking mechanism 12 comprises an eighth rack 121, and the eighth rack 121 is provided with a second lifting mechanism 122, the second lifting mechanism 122 has the same structure as the first lifting mechanism 112 and is used for transferring the conveying jig 18 from the upper first conveying assembly line 101 to the lower first conveying assembly line 101, which will not be repeated here.

[0071] As shown in Figure 1 , Figure 22 , and Figure 24As shown, the total assembly branch 2 includes a second conveying line 21, a stacking jig 22 is arranged on the second conveying line 21, the second conveying line 21 is arranged with a stacking module 23 at one end close to the material preparation mechanism 3, and a discharging module 24 is arranged at the other end of the second conveying line 21, and the second conveying line 21 drives the stacking jig 22 to reciprocate between the stacking module 23 and the discharging module 24; the stacking jig 22 includes a bottom supporting plate 221, a plurality of limiting columns 224 are arranged on the bottom supporting plate 221 and extend upward in the vertical direction, a supporting plate 222 is assembled in the space defined by the plurality of limiting columns 224, and the supporting plate 222 is in sliding abutment with the limiting columns 224; the bottom supporting plate 221 is provided with a bearing block 223, and the bearing block 223 is between the bottom supporting plate 221 and the supporting plate 222.

[0072] Further, the stacking module 23 includes a stacking rack 231, and a lifting suspension 232 is adjustably arranged on the stacking rack 231 in the vertical direction, and the lifting suspension 232 extends between the bottom supporting plate 221 and the supporting plate 222. In the embodiment, the lifting suspension 232 is in sliding connection with the stacking rack 231 through a sliding rail sliding block assembly, a screw rod driving assembly is arranged on the stacking rack 231, and is used to drive the lifting suspension 232 to move in the vertical direction. In the embodiment, the transfer mechanism 4 is a mechanical arm, and the mounting stacking sequence transfers the electrode a2, the diaphragm a4, the bipolar plate a1 and the sealing pad a3 on the supporting plate 222 to form the electric pile 5. In use, the lifting suspension 232 is at a high position, and the height is continuously lowered as the number of layers of the electric pile 5 increases, so that the top height position of the electric pile 5 is at a certain level, so as to facilitate the stacking of the transfer mechanism 4.

[0073] As shown in the figure, Figure 23 The discharging module 24 includes a discharging rack 241, and a turnover frame 242 is rotatably installed on the discharging rack 241, the turnover frame 242 includes a first frame plate 2421 and a second frame plate 2422 connected with each other, the first frame plate 2421 is perpendicular to the second frame plate 2422, the stacking jig 22 can be transported to the first frame plate 2421 by the second conveying line 21 and abut to the second frame plate 2422. Specifically, the turnover frame 242 is driven to overturn by a cylinder arranged on the discharging rack 241. In use, the second conveying line 21 transports the stacking jig 22 together with the electric pile 5 to above the first frame plate 2421 and abuts to the second frame plate 2422, at this time, the cylinder drives the turnover frame 242 to overturn by 90°, finally the second frame plate 2422 is horizontal and the first frame plate 2421 is perpendicular to the ground, which facilitates the discharging of the electric pile 5. After discharging, the turnover frame 242 is reset, and the stacking jig 22 is transported back to the stacking module 23 by the second conveying line 21 to stack the next electric pile 5.

[0074] In some embodiments, the first shelf plate 2421 is provided with a jig limiting head 24211, and the stack jig 22 is at least partially between the jig limiting head 24211 and the first shelf plate 2421. The jig limiting head 24211 is used to limit the stack jig 22 during the discharging process, facilitates the separation of the stack 5 and the stack jig 22, and can prevent the stack jig 22 from being separated from the first shelf plate 2421.

[0075] In some embodiments, the second shelf plate 2422 is provided with an extension limiting rod (not shown in the figure), which is perpendicular to the second shelf plate 2422 and is used to limit the stack 5, so as to maintain the stability of the stack 5 during the discharging process. The extension limiting rod is arranged on both sides of the width direction of the second shelf plate 2422. As shown in the figure, the width direction of the second shelf plate 2422 is parallel to the width direction of the second conveying assembly line 21, that is, parallel to the rotation shaft 2411 of the turnover frame 242 around the discharging rack 241. Figure 23

[0076] In summary, the stack assembly line provided by the present application can significantly reduce the product failure rate, overcome the technical problems of high product defect rate and poor consistency in the prior art, and is beneficial to improve the production efficiency.

[0077] The technical means disclosed in the present application scheme is not limited to the technical means disclosed in the above embodiments, but also includes the technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which are also considered as the protection scope of the present application.​

Claims

1. A fuel cell stack assembly line, characterized in that, The device includes a pre-assembly branch line, a material preparation mechanism, a transfer mechanism, and a final assembly branch line. The pre-assembly branch line is arranged adjacent to the final assembly branch line. The material preparation mechanism is located at one end of the final assembly branch line. The transfer mechanism is located between the final assembly branch line and the material preparation mechanism. The material preparation mechanism is used to store diaphragms, bipolar plates, and sealing gaskets. The pre-assembly branch line is used to assemble fluid flow frames, diaphragms, and felt to form electrodes. The transfer mechanism is used to transfer diaphragms, bipolar plates, sealing gaskets, and electrodes from adjacent pre-assembly branch lines to the final assembly branch line for stacking to form an electrode stack.

2. The fuel cell stack assembly line according to claim 1, characterized in that, The pre-assembled branch line includes a conveying fixture, a feeding mechanism, a return line, and a discharging mechanism. The conveying fixture reciprocates between the feeding mechanism and the discharging mechanism via the return line. The conveying fixture is used to convey the electrodes. Between the feeding mechanism and the unloading mechanism, in the conveying direction of the return line, there are sequentially arranged a first assembly mechanism, a first NG mechanism, a flipping mechanism, a first dispensing mechanism, an adhesive detection mechanism, a second NG mechanism, a second assembly mechanism, and a maintenance mechanism, wherein the first assembly mechanism is located close to the feeding mechanism and the maintenance mechanism is located close to the unloading mechanism.

3. The fuel cell stack assembly line according to claim 2, characterized in that, The return line includes a conveying bracket, on which two first conveying lines are arranged at intervals along the vertical direction. The first conveying line on the upper side is used to convey the conveying fixture from the loading mechanism to the unloading mechanism, and the first conveying line on the lower side is used to convey the conveying fixture from the unloading mechanism to the loading mechanism.

4. The fuel cell stack assembly line according to claim 3, characterized in that, The feeding mechanism includes a feeding frame, on which a feeding space and a first return space are configured. A first lifting mechanism is configured in the first return space for transferring the conveying fixture from the lower first conveying line to the upper first conveying line.

5. The fuel cell stack assembly line according to claim 4, characterized in that, The loading space is equipped with a first trolley and a lifting mechanism; The first trolley is equipped with a fixed support plate, and the upper side of the fixed support plate is provided with a baffle extending upward in the vertical direction. Multiple baffles surround and limit the liquid flow frame. The upper side of the fixed support plate is provided with a movable support plate, and the liquid flow frame is stacked on the movable support plate. The lifting mechanism includes a first main longitudinal frame plate disposed on the feeding frame. A first secondary longitudinal frame plate is adjustablely disposed on the first main longitudinal frame plate in the vertical direction. An extension frame is disposed on the first secondary longitudinal frame plate. A top plate is disposed on the extension frame. An avoidance slot corresponding to the top plate is provided through the fixed support plate. The top plate can pass through the avoidance slot and abut against the movable support plate.

6. The fuel cell stack assembly line according to claim 5, characterized in that, The first lifting mechanism includes a second main longitudinal frame plate disposed on the feeding machine frame, and a second auxiliary longitudinal frame plate is slidably mounted on the second main longitudinal frame plate in the vertical direction; Several rollers are rotatably mounted on the second auxiliary longitudinal plate.

7. The fuel cell stack assembly line according to claim 2, characterized in that, The first assembly mechanism includes a first frame, on which a first dispensing pressure plate is disposed. The return line passes through the first frame. When the conveying fixture on the return line is in the first assembly mechanism, the conveying fixture is located below the first dispensing pressure plate. A liquid flow frame is mounted on the conveying fixture. A first dispensing assembly and a first gripping assembly are also adjustablely mounted on the first frame. The first dispensing assembly is used to dispense adhesive onto the liquid flow frame, and the first gripping assembly is used to grip a partition and attach the partition to the liquid flow frame. The first point of the adhesive plate has a through hole for passing through the partition.

8. The fuel cell stack assembly line according to claim 7, characterized in that, A shaping plate is adjustablely provided on the first adhesive pressing plate along the width direction of the partition. The shaping plate is provided with a shaping plane for supporting the partition. Width limiting blocks are provided on both sides of the shaping plate in the width direction of the partition, and length limiting blocks are provided on both sides of the shaping plate in the length direction of the partition. The width limiting blocks, the length limiting blocks and the shaping plane constitute the positioning space of the partition.

9. The fuel cell stack assembly line according to claim 7, characterized in that, The first gripping component includes a first hanger, which is adjustablely mounted on a first frame. A first base plate is provided at the bottom of the first hanger. A first guide post extending vertically is disposed on the first base plate. The first guide post passes through the first base plate and is slidably connected to it. A connecting plate is disposed at the upper end of the first guide post, and a first support plate is disposed at the lower end of the first guide post. A first driving cylinder is disposed on the first base plate, and the first driving cylinder acts on the connecting plate to enable it to move vertically. Several gripping suction cups are disposed on the first support plate.

10. The fuel cell stack assembly line according to claim 9, characterized in that, An assembly block is disposed on the first support plate, and the first support plate is located between the assembly block and the first base plate. A second guide post extending downward in the vertical direction is disposed on the assembly block. A buffer spring and a pressure holding block are disposed on the outer sleeve of the second guide post, and the buffer spring is located between the pressure holding block and the assembly block.

11. The fuel cell stack assembly line according to claim 10, characterized in that, The pressure holding block is provided with a guide square hole, and the second guide post is provided with a square shaft section that matches the guide square hole; The lower side of the pressure holding block is provided with a buffer hole, which is coaxially connected to the guide square hole. An anti-fall screw connected to the lower end of the second guide post is installed in the buffer hole.

12. The fuel cell stack assembly line according to claim 2, characterized in that, The first NG mechanism includes a second frame through which the return line passes. A second gripping assembly is adjustablely mounted on the second frame for gripping a combination of a fluid flow frame and a partition on a delivery fixture. The second grasping component is provided with a first vision component, the first vision component includes an assembly plate disposed on the second grasping component, the assembly plate is adjustablely provided with an adjustment plate, and a CCD camera bracket is mounted on the adjustment plate for mounting a CCD camera.

13. The fuel cell stack assembly line according to claim 2, characterized in that, The flipping mechanism includes a third frame through which the return line passes. Lifting and flipping assemblies are arranged at both ends of the third frame in the width direction of the return line. Each lifting and flipping assembly includes a third base plate fixedly mounted on the third frame. A flipping mounting plate is provided on the upper side of the third base plate. Multiple fourth guide posts are arranged on the flipping mounting plate. The fourth guide posts extend vertically and penetrate the third base plate, and are slidably connected to the third base plate. A cylinder for driving the flipping mounting plate to move vertically is arranged on the third base plate.

14. The fuel cell stack assembly line according to claim 2, characterized in that, The second assembly mechanism includes a sixth frame, on which an assembly area and a buffer area are configured, the return line is located in the buffer area, and a third gripping component is adjustablely provided on the sixth frame, the third gripping component being capable of reciprocating between the assembly area and the buffer area.

15. The fuel cell stack assembly line according to claim 14, characterized in that, The third gripping component includes a second hanger, a fourth base plate is disposed at the lower end of the second hanger, a first gripping plate and a second gripping plate are disposed sequentially on the lower side of the fourth base plate, a fifth guide post extending upward in the vertical direction is disposed on the first gripping plate, and the fifth guide post passes through the fourth base plate and is slidably connected to it. The fifth guide post is fitted with a reset spring, which is located between the fourth base plate and the first gripping plate. The first gripping plate is equipped with a second driving cylinder, and the second gripping plate is equipped with a sixth guide post. The sixth guide post extends vertically, passes through the first gripping plate, and is slidably connected to it. The second driving cylinder acts on the second gripping plate so that the second gripping plate can move closer to or further away from the first gripping plate in the vertical direction. The second gripping plate is equipped with several needle-shaped suction cups.

16. The fuel cell stack assembly line according to claim 2, characterized in that, The maintenance mechanism includes a seventh frame and a maintenance assembly, the return line passes through the seventh frame, and the maintenance assembly is adjustablely mounted on the seventh frame; The maintenance assembly includes an extension plate, on which a maintenance base block is adjustable in the vertical direction. A reference wheel set and a maintenance wheel set are provided on the maintenance base block. The maintenance wheel set includes a first wheel frame and a limiting block. The limiting block is fixedly installed on the maintenance base block. The first wheel frame is slidably installed on the maintenance base block in the vertical direction. The limiting block is located above the first wheel frame. A displacement sensor is disposed between the first wheel frame and the limiting block. The reference wheel set includes a second wheel frame, which is mounted on the maintenance base block. A second roller is rotatably mounted on the second wheel frame, and a first roller is rotatably mounted on the first wheel frame.

17. The fuel cell stack assembly line according to claim 1, characterized in that, The assembly line includes a second conveyor line, on which a stacking fixture is configured. A stacking module is configured at one end of the second conveyor line near the material preparation mechanism, and a unloading module is configured at the other end of the second conveyor line. The second conveyor line drives the stacking fixture to reciprocate between the stacking module and the unloading module. The stacking fixture includes a base plate, on which multiple limiting posts are provided extending upward in the vertical direction. A support plate is assembled within the space defined by the multiple limiting posts, and the support plate slides against the limiting posts. A support block is disposed on the base plate, and the support block is located between the base plate and the support plate.

18. The fuel cell stack assembly line according to claim 17, characterized in that, The stacking module includes a stacking frame, on which a lifting suspension is adjustable in the vertical direction, extending between the base plate and the support plate.

19. The fuel cell stack assembly line according to claim 17, characterized in that, The unloading module includes an unloading frame, on which a flipping frame is rotatably mounted. The flipping frame includes a first frame plate and a second frame plate connected to each other. The first frame plate is perpendicular to the second frame plate. The stacking fixture can be transported to the first frame plate via the second conveyor line and abut against the second frame plate.

20. The fuel cell stack assembly line according to claim 19, characterized in that, The first shelf is provided with a fixture limiting head, and the stacking fixture is at least partially located between the fixture limiting head and the first shelf.

21. The fuel cell stack assembly line according to claim 19, characterized in that, An extension limiting rod is provided on the second frame plate, and the extension limiting rod is perpendicular to the second frame plate; The extension limiting rods are arranged on both sides in the width direction of the second frame plate; The width direction of the second frame plate is parallel to the axis of rotation of the tilting frame around the unloading frame.

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