High-precision stack stacking device and method

Abstract

The invention discloses an electric pile high-precision stacking device and method. The device comprises a stacking mechanism. A visual detection mechanism; a bipolar plate deviation rectifying mechanism; a bipolar plate feeding mechanism; the bipolar plate carrying mechanism is used for moving the bipolar plate on the bipolar plate feeding mechanism to the bipolar plate deviation rectifying mechanism and moving the bipolar plate subjected to deviation rectifying by the bipolar plate deviation rectifying mechanism to the stacking mechanism; a membrane electrode deviation rectifying mechanism; a membrane electrode feeding mechanism; and the membrane electrode carrying mechanism is used for moving the membrane electrode on the membrane electrode feeding mechanism to the membrane electrode deviation correcting mechanism and moving the membrane electrode subjected to deviation correction by the membrane electrode deviation correcting mechanism to the stacking mechanism. According to the high-precision stack stacking device and method provided by the invention, the bipolar plate and the membrane electrode are firstly rectified during stack stacking, then stacked materials are detected through the visual detection mechanism, and the bipolar plate and the membrane electrode which are out of tolerance are removed, so that the overall stack precision of the stack is ensured.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and more specifically, to a high-precision stacking device and method for fuel cells. Background Art

[0002] Fuel cell stacks are mainly composed of bipolar plates and membrane electrodes stacked in series, and the quality of the stack is closely related to the performance of the fuel cell. During the stacking process, the bipolar plates and membrane electrodes are generally stacked in a stacking order by a robot, but the existing stacking equipment has low precision, especially the inability to detect the size errors of the bipolar plates and membrane electrodes during stacking. If out-of-tolerance bipolar plates or membrane electrodes are installed in the stack, it will affect the stacking accuracy of the entire stack, resulting in uneven force on the fuel cell stack, which in turn affects the sealing performance, contact performance and mass transfer characteristics of the stack, and ultimately affects the output characteristics of the battery. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision stacking device and method for a battery stack. When stacking the battery stack, the bipolar plates and membrane electrodes are first corrected, and then the stacked materials are inspected by a visual inspection mechanism to remove bipolar plates and membrane electrodes that exceed the tolerance, thereby ensuring the overall stacking accuracy of the battery stack.

[0004] In order to achieve these purposes and other advantages according to the present invention, a high-precision stacking device for a battery stack is provided, comprising:

[0005] Stacking mechanism;

[0006] A visual inspection mechanism, which is arranged above the stacking mechanism;

[0007] Bipolar plate deviation correction mechanism;

[0008] Bipolar plate feeding mechanism;

[0009] A bipolar plate transport mechanism, which is used to move the bipolar plates on the bipolar plate feeding mechanism to the bipolar plate deviation correction mechanism, and to move the bipolar plates corrected by the bipolar plate deviation correction mechanism to the stacking mechanism;

[0010] Membrane electrode correction mechanism;

[0011] Membrane electrode feeding mechanism;

[0012] The membrane electrode conveying mechanism is used to move the membrane electrode on the membrane electrode loading mechanism to the membrane electrode correction mechanism, and to move the membrane electrode corrected by the membrane electrode correction mechanism to the stacking mechanism.

[0013] Furthermore, in the high-precision stacking device for a battery stack, the bipolar plate transport mechanism includes:

[0014] A first linear drive unit;

[0015] A first bipolar plate transporting assembly is transmission-connected to the first linear drive unit, and the first linear drive unit drives the first bipolar plate transporting assembly to move back and forth above the bipolar plate feeding mechanism, the bipolar plate deviation correcting mechanism and the stacking mechanism.

[0016] Furthermore, the high-precision stacking device of the battery stack further includes:

[0017] The first out-of-tolerance bipolar plate collecting bin, wherein the first linear drive unit can drive the first bipolar plate transporting assembly to move above the first out-of-tolerance bipolar plate collecting bin.

[0018] Furthermore, in the high-precision stacking device for a battery stack, the first out-of-tolerance bipolar plate collection bin is arranged between the bipolar plate feeding mechanism and the bipolar plate correcting mechanism, the first bipolar plate transporting assembly is set into two groups, the first linear drive unit is a multi-slider linear module, and the two groups of the first bipolar plate transporting assemblies are respectively connected to the two slides of the multi-slider linear module.

[0019] Furthermore, in the high-precision stacking device for a battery stack, the bipolar plate loading mechanism comprises:

[0020] Bipolar plate silo;

[0021] A second linear drive unit;

[0022] a third linear drive unit, two ends of which extend respectively to below the bipolar plate transport mechanism and the second linear drive unit;

[0023] A transfer trolley, the upper end of which is provided with a composite suction cup, and the transfer trolley is transmission-connected to the third linear drive unit;

[0024] A second out-of-tolerance bipolar plate collection bin, which is disposed between the bipolar plate bin and the third linear drive unit;

[0025] The second bipolar plate transport assembly is transmission-connected to the second linear drive unit, and the second linear drive unit drives the second bipolar plate transport assembly to move back and forth above the bipolar plate bin, the second out-of-tolerance bipolar plate collection bin and the third linear drive unit.

[0026] Furthermore, in the high-precision stacking device for a battery stack, the stacking mechanism includes:

[0027] The stacking tool has a plurality of limit rods vertically disposed on the upper end thereof, and the plurality of limit rods are arranged to form a stacking cavity;

[0028] A carrying plate, which is arranged in the stacking cavity;

[0029] A driving mechanism is connected to the supporting plate to drive the supporting plate to move up and down in the stacking cavity.

[0030] Furthermore, in the high-precision stacking device for a battery stack, the driving mechanism includes:

[0031] Two lifting units are arranged oppositely on two sides of the stacking tooling;

[0032] Two fourth linear drive units, which are respectively connected to the two lifting units in a transmission manner;

[0033] The two support frames are respectively connected to the two linear drive units in a transmission manner. The lower end of the support plate is provided with a through slot corresponding to the support frame. The two fourth linear drive units drive the two support frames to move closer to or away from each other, so that the two support frames extend into the through slot to support the support plate, or move out of the through slot to separate from the support plate.

[0034] Furthermore, in the high-precision stacking device for a battery stack, the stacking mechanism further comprises:

[0035] A lifting platform, on which the stacking tool is placed.

[0036] Furthermore, the high-precision stacking device of the battery stack further includes:

[0037] The plate pressing mechanism comprises two sets of pressing assemblies arranged opposite to each other on both sides of the stacking mechanism, and the pressing assemblies comprise:

[0038] A fifth linear drive unit;

[0039] At least two pressing plates are horizontally arranged and are in driving connection with the fifth linear drive unit, and the fifth linear drive unit drives the pressing plates to move above the stacking tooling or move them away from above the stacking tooling.

[0040] The present invention also provides a high-precision stacking method for a battery stack, comprising the following steps:

[0041] S1. Move the bipolar plate on the bipolar plate feeding mechanism to the bipolar plate deviation correction mechanism for deviation correction through the bipolar plate conveying mechanism;

[0042] S2, moving the membrane electrode on the membrane electrode feeding mechanism to the membrane electrode deviation correction mechanism through the membrane electrode conveying mechanism for deviation correction;

[0043] S3. The bipolar plate conveying mechanism and the membrane electrode conveying mechanism move the corrected bipolar plates and membrane electrodes to the stacking mechanism in turn for stacking. After the bipolar plates or membrane electrodes are moved to the stacking mechanism, the bipolar plates or membrane electrodes are inspected by a visual inspection mechanism, and the bipolar plates or membrane electrodes that exceed the tolerance are removed from the stacking mechanism by the bipolar plate conveying mechanism and the membrane electrode conveying mechanism.

[0044] The beneficial effects of the present invention are:

[0045] The high-precision stacking device of the battery stack of the present invention first corrects the bipolar plates and membrane electrodes when stacking the battery stack, and then inspects the stacked materials through a visual inspection mechanism to remove bipolar plates and membrane electrodes that exceed the tolerance, thereby improving the overall stacking accuracy of the battery stack and achieving high-precision stacking of the battery stack.

[0046] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the high-precision stacking device of the battery stack according to the present invention;

[0048] Figure 2 It is a structural schematic diagram of the high-precision stacking device of the battery stack according to the present invention;

[0049] Figure 3 A top view of the high-precision stacking device for battery stacks according to the present invention;

[0050] Figure 4 A side view of the high-precision stacking device of the battery stack according to the present invention;

[0051] Figure 5 It is a structural schematic diagram of the bipolar plate deviation correction mechanism of the present invention;

[0052] Figure 6 It is a structural schematic diagram of the first bipolar plate handling assembly of the present invention;

[0053] Figure 7 It is a structural schematic diagram of the visual detection mechanism of the present invention;

[0054] Figure 8 It is a structural schematic diagram of the stacking mechanism of the present invention;

[0055] Fig. 9 A side view of the stacking mechanism of the present invention;

[0056] Fig.10 It is a schematic structural diagram of the driving mechanism of the present invention.

[0057] Wherein, the reference numerals represent:

[0058] Stacking mechanism 1; stacking tool 101; limiting rod 102; carrying plate 103; lifting unit 104; fourth linear drive unit 105; support frame 106; lifting platform 107; fifth linear drive unit 108; pressing sheet 109;

[0059] Visual inspection mechanism 2; mounting bracket 201; industrial camera 202; camera mirror 203;

[0060] Bipolar plate deviation correction mechanism 3; support platform 301; deviation corrector 302; deviation correction support platform 303; positioning camera 304;

[0061] Bipolar plate feeding mechanism 4; bipolar plate material bin 401; second linear drive unit 402; third linear drive unit 403; transfer trolley 404; second out-of-tolerance bipolar plate collection bin 405; second bipolar plate handling assembly 406;

[0062] Bipolar plate transport mechanism 5; first linear drive unit 501; first bipolar plate transport assembly 502; first out-of-tolerance bipolar plate collection bin 503;

[0063] Membrane electrode deviation correction mechanism 6;

[0064] Membrane electrode feeding mechanism 7;

[0065] Membrane electrode transport mechanism 8. DETAILED DESCRIPTION

[0066] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0067] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] like Figure 1-Figure 4 As shown, an embodiment of the present invention provides a high-precision stacking device for a battery stack, comprising:

[0069] Stacking mechanism 1;

[0070] A visual inspection mechanism 2, which is arranged above the stacking mechanism 1;

[0071] Bipolar plate deviation correction mechanism 3: Bipolar plate deviation correction mechanism 3 adopts a small lead high-precision ground lead screw to ensure the dimensional accuracy of deviation correction, and performs multiple deviation corrections to improve the overall accuracy of the deviation correction platform;

[0072] Bipolar plate feeding mechanism 4;

[0073] A bipolar plate transport mechanism 5, which is used to move the bipolar plates on the bipolar plate feeding mechanism 4 to the bipolar plate correction mechanism 3, and to move the bipolar plates corrected by the bipolar plate correction mechanism 3 to the stacking mechanism 1; a membrane electrode correction mechanism 6;

[0074] Membrane electrode feeding mechanism 7;

[0075] The membrane electrode conveying mechanism 8 is used to move the membrane electrode on the membrane electrode feeding mechanism 7 to the membrane electrode correction mechanism 6, and to move the membrane electrode corrected by the membrane electrode correction mechanism 6 to the stacking mechanism 1. The bipolar plate conveying mechanism 5 and the membrane electrode conveying mechanism 8 work alternately and sequentially load the materials to the stacking mechanism 1. When the visual inspection mechanism 2 detects out-of-tolerance materials, the conveying mechanism corresponding to the material continues to work, while the other group of conveying mechanisms suspends work, and after the conveying mechanism removes the out-of-tolerance materials, it reloads the materials to the stacking mechanism 1.

[0076] In this embodiment, the bipolar plates and membrane electrodes are loaded through the bipolar plate loading mechanism 4 and the membrane electrode loading mechanism 7 respectively, and the bipolar plates and membrane electrodes are transported to their discharge positions one by one, and then the bipolar plates at the discharge position of the bipolar plate loading mechanism 4 are moved to the bipolar plate correction mechanism 3 by the bipolar plate conveying mechanism 5, and the membrane electrodes at the discharge position of the membrane electrode loading mechanism 7 are moved to the membrane electrode correction mechanism 6 by the membrane electrode loading mechanism 7. The bipolar plate correction mechanism 3 corrects the bipolar plates thereon, and the membrane electrode correction mechanism 6 corrects the membrane electrodes thereon. Finally, the bipolar plate conveying mechanism 5 and the membrane electrode conveying mechanism 8 work alternately, and the corrected bipolar plates on the bipolar plate correction mechanism 3 and the corrected membrane electrodes on the membrane electrode correction mechanism 6 are alternately moved to the stacking mechanism 1. When the bipolar plate or membrane electrode is moved to the stacking mechanism 1, it is located at the top of the battery stack, and the detection end of the visual inspection mechanism 2 faces the battery stack. The visual inspection mechanism 2 is as shown in FIG. Figure 7 As shown in , it generally includes a mounting bracket 201, an industrial camera 202 and a camera mirror 203. When the visual inspection mechanism 2 is working, the industrial camera is used to photograph the outline of the battery stack, and an alarm is issued when the battery stack is not stacked evenly. The bipolar plate or membrane electrode at the top of the battery stack is marked as an out-of-tolerance material, and the bipolar plate conveying mechanism 5 removes the out-of-tolerance bipolar plate from the battery stack, or the membrane electrode conveying mechanism 8 removes the out-of-tolerance membrane electrode from the battery stack. In this embodiment, Figure 1 and Figure 4As shown, the visual inspection mechanism 2 adopts a dual-vision inspection structure, that is, two groups of industrial cameras are used to achieve dual vision, thereby ensuring the visual positioning accuracy of large-size materials.

[0077] Among them, the structure of the bipolar plate correction mechanism 3 is as follows: Figure 5 As shown, it consists of a support platform 301, a deflection corrector 302, a deflection correction support table 303 and two positioning cameras 304. The bipolar plate deflection correction mechanism 3 uses the positioning camera 304 to take pictures, and compares the pictures taken with the standard pictures in the processor (or database) to identify whether the position of the bipolar plate is correct or flat. When the deflection corrector 302 identifies an abnormality, the deflection correction support table 303 can be used for fine-tuning to change the posture of the bipolar plate. The deflection correction support table 303 has a built-in suction cup to hold the bipolar plate. In this embodiment, the first threshold θ1, the second threshold θ2 and the third threshold θ3 of the deflection angle θ of the bipolar plate relative to the standard position of the bipolar plate can be set in advance in the processor, θ1<θ2<θ3, and the number of fine-tuning of the deflection correction support table 303 in each interval is set A1, A2, A3. When θ≤θ1 in the real-time image of the bipolar plate taken by the positioning camera 304, there is no limit on the number of times the correction support platform 303 is fine-tuned; when θ1<θ≤θ2, the correction support platform 303 must be fine-tuned A1 times; when θ2<θ≤θ3, the correction support platform 303 must be fine-tuned A2 times; when θ≥θ3, the correction support platform 303 must be fine-tuned A3 times. When the deflection angle of the bipolar plate relative to the standard position of the bipolar plate is too large, the correction support platform 303 is forcibly limited in the number of times of fine-tuning, and the correction effect of the bipolar plate is ensured through multiple corrections. The membrane electrode correction mechanism 6 adopts the same structure as the bipolar plate correction mechanism 3, which will not be repeated here.

[0078] Preferably, as another embodiment of the present invention, the bipolar plate transport mechanism 5 comprises:

[0079] A first linear drive unit 501;

[0080] The first bipolar plate transporting assembly 502 is transmission-connected to the first linear drive unit 501 , and the first linear drive unit 501 drives the first bipolar plate transporting assembly 502 to move back and forth above the bipolar plate feeding mechanism 4 , the bipolar plate deviation correcting mechanism 3 and the stacking mechanism 1 .

[0081] In this embodiment, the first linear drive unit 501 can adopt a linear module, which drives the bipolar plate handling assembly to move back and forth above the bipolar plate feeding mechanism 4, the bipolar plate correction mechanism 3 and the stacking mechanism 1, as one of the implementation methods, such as Figure 6As shown, the first bipolar plate handling assembly 502 includes a vertically arranged linear module, a mounting frame and a composite suction cup. The linear module drives the mounting frame to move up and down to adjust the height of the composite suction cup. A plurality of vacuum suction cups are arranged in the composite suction cup to adsorb the bipolar plate. The bipolar plate at the discharge position of the bipolar plate feeding mechanism 4 is lifted upward by the first bipolar plate handling assembly 502, and after being moved to the bipolar plate correction mechanism 3 for screening, the first bipolar plate handling assembly 502 places the bipolar plate on the correction support table. In addition, the first bipolar plate handling assembly 502 can also move the bipolar plate corrected on the bipolar plate correction mechanism 3 to the stacking mechanism 1.

[0082] The structure of the membrane electrode transport mechanism 8 is the same as that of the bipolar plate transport mechanism 5 , and the specific structure of the membrane electrode transport mechanism 8 will not be introduced here.

[0083] Preferably, as another embodiment of the present invention, it also includes:

[0084] The first out-of-tolerance bipolar plate collecting bin 503 , the first linear drive unit 501 can drive the first bipolar plate transporting assembly 502 to move above the first out-of-tolerance bipolar plate collecting bin 503 .

[0085] In this embodiment, after the bipolar plate located at the top of the battery stack is marked as out-of-tolerance material by the visual inspection mechanism 2, the first bipolar plate transporting assembly 502 moves to above the stacking mechanism 1, moves the out-of-tolerance bipolar plate to the first out-of-tolerance bipolar plate collection bin 503 for temporary storage, and then the first bipolar plate transporting assembly 502 moves to above the bipolar plate correction mechanism 3, moves the new corrected bipolar plate to the stacking mechanism 1, and places it at the top of the battery stack.

[0086] Preferably, as another embodiment of the present invention, the first out-of-tolerance bipolar plate collection bin 503 is arranged between the bipolar plate feeding mechanism 4 and the bipolar plate correcting mechanism 3, the first bipolar plate transporting assembly 502 is set to two groups, the first linear drive unit 501 is a multi-slider linear module, and the two groups of the first bipolar plate transporting assembly 502 are respectively connected to the two sliders of the multi-slider linear module.

[0087] In this embodiment, in order to improve the transport efficiency of the bipolar plate transport mechanism 5, as shown in FIG. Figure 3 As shown, two groups of first bipolar plate handling assemblies 502 are provided, and the first linear drive unit 501 is a multi-slider linear module, whose slides move independently of each other, and the two groups of first bipolar plate handling assemblies 502 are driven to move horizontally by different slides. When the bipolar plate handling mechanism 5 works normally, the first group of bipolar plate handling assemblies 502 moves back and forth above the bipolar plate feeding mechanism 4 and the bipolar plate deviation correction mechanism 3, and the second group of bipolar plate handling assemblies 502 moves back and forth above the first out-of-tolerance bipolar plate collection bin 503, the bipolar plate deviation correction mechanism 3 and the stacking mechanism 1.

[0088] When the first group of bipolar plate transporting assemblies 502 starts to move the bipolar plates at the discharge position of the bipolar plate feeding mechanism 4 to the bipolar plate correcting mechanism 3, the second group of bipolar plate transporting assemblies 502 moves the bipolar plates after the correction by the bipolar plate correcting mechanism 3 to the stacking mechanism 1. After the first group of bipolar plate transporting assemblies 502 put the bipolar plates on the bipolar plate correcting mechanism 3, the bipolar plate correcting mechanism 3 starts to continue correcting the bipolar plates. The first group of bipolar plate transporting assemblies 502 returns to the top of the discharge position of the bipolar plate feeding mechanism 4 to wait. After the second group of bipolar plate transporting assemblies 502 complete the movement of the bipolar plates, they return to the top of the bipolar plate correcting mechanism 3. If the visual inspection mechanism 2 detects that the bipolar plate is out of tolerance, the membrane electrode conveying mechanism 8 stops working, the second group of bipolar plate conveying components 502 moves to the top of the stacking mechanism 1, and moves the out-of-tolerance materials to the first out-of-tolerance bipolar plate collection bin 503, and then moves to the top of the bipolar plate correction mechanism 3 again, moves the bipolar plates corrected on the bipolar plate correction mechanism 3 to the stacking mechanism 1, and then returns to the top of the bipolar plate correction mechanism 3. When the visual inspection mechanism 2 detects that the bipolar plate is not out of tolerance, the membrane electrode conveying mechanism 8 starts working.

[0089] The bipolar plate is moved between the first out-of-tolerance bipolar plate collection bin 503, the bipolar plate correction mechanism 3 and the stacking mechanism 1; another set of bipolar plate handling components moves back and forth above the bipolar plate feeding mechanism 4 and the bipolar plate correction mechanism 3, and moves the bipolar plate at the discharge position of the bipolar plate feeding mechanism 4 to the bipolar plate correction mechanism 3. When the bipolar plate handling mechanism 5 works normally,

[0090] The two groups of first bipolar plate transport assemblies 502 work together to shorten the time for the bipolar plates to move between the bipolar plate loading mechanism 4, the first out-of-tolerance bipolar plate collecting bin 503, the bipolar plate correction mechanism 3 and the stacking mechanism 1, thereby improving the efficiency of bipolar plate transport.

[0091] The structure of the membrane electrode transport mechanism 8 is the same as that of the bipolar plate transport mechanism 5. Figure 1 and Figure 3 As shown, the membrane electrode conveying mechanism 8 and the bipolar plate conveying mechanism 5 can share a set of multi-slider linear modules, thereby improving the control accuracy of the membrane electrode conveying mechanism 8 and the bipolar plate conveying mechanism 5.

[0092] Preferably, as another embodiment of the present invention, the bipolar plate loading mechanism 4 comprises:

[0093] Bipolar plate silo 401;

[0094] A second linear drive unit 402;

[0095] A third linear drive unit 403, two ends of which extend to the bipolar plate transport mechanism 5 and below the second linear drive unit 402 respectively;

[0096] The transfer trolley 404 has a composite suction cup at its upper end, and the transfer trolley 404 is transmission-connected to the third linear drive unit 403; the two ends of the third linear drive unit 403 are respectively a discharge position and a loading position, the discharge position is located below the bipolar plate handling mechanism 5, and the loading position is located below the second linear drive unit 402;

[0097] A second out-of-tolerance bipolar plate collection bin 405, which is disposed between the bipolar plate bin 401 and the third linear drive unit 403;

[0098] The second bipolar plate transport assembly 406 is transmission-connected to the second linear drive unit 402 , and the second linear drive unit 402 drives the second bipolar plate transport assembly 406 to move back and forth above the bipolar plate bin 401 , the second out-of-tolerance bipolar plate collection bin 405 and the third linear drive unit 403 .

[0099] In this embodiment, the second linear drive unit 402 drives the second bipolar plate handling assembly 406 to move back and forth above the bipolar plate bin 401, the second over-tolerance bipolar plate collection bin 405 and the third linear drive unit 403, so as to realize the bipolar plate between the bipolar plate bin 401, the second over-tolerance bipolar plate collection bin 405 and the transfer cart 404. When loading the bipolar plate, the third linear drive unit 403 drives the transfer cart 404 to move to the loading position, the second linear drive unit 402 drives the second bipolar plate handling assembly 406 to move above the bipolar plate bin 401, adsorbs the bipolar plate in the bipolar plate bin 401, the second linear drive unit 402 drives the second bipolar plate handling assembly 406 to move to the loading position, and the second bipolar plate handling assembly 406 places the adsorbed bipolar plate on the transfer cart 404. The third linear drive unit 403 drives the transfer cart 404 to move to the unloading position to load the bipolar plate handling mechanism 5.

[0100] In addition, when there are too many out-of-tolerance bipolar plates temporarily stored in the first out-of-tolerance bipolar plate collecting bin 503 and the height is too high, the movement of the first bipolar plate transporting assembly 502 may be affected, so that the out-of-tolerance bipolar plates temporarily stored in the first out-of-tolerance bipolar plate collecting bin 503 need to be transferred. At this time, a second out-of-tolerance bipolar plate collecting bin 405 is set between the bipolar plate bin 401 and the third linear drive unit 403, and the out-of-tolerance bipolar plates in the first out-of-tolerance bipolar plate collecting bin 503 are moved to above the discharge position of the bipolar plate feeding mechanism 4 by the bipolar plate conveying mechanism 5, and the out-of-tolerance bipolar plates are placed on the transfer trolley 404, and the out-of-tolerance bipolar plates are moved to the loading position of the bipolar plate feeding mechanism 4 by the transfer trolley 404, and then the out-of-tolerance bipolar plates are sucked up by the second bipolar plate conveying assembly 406, and the second linear drive unit 402 drives the out-of-tolerance bipolar plates to move to the second out-of-tolerance bipolar plate collecting bin 405, and the second bipolar plate conveying assembly 406 places the out-of-tolerance bipolar plates in the second out-of-tolerance bipolar plate collecting bin 405.

[0101] The second bipolar plate transport assembly 406 adopts the same structure as the first bipolar plate transport assembly 502, which will not be described in detail here. The second linear drive unit 402 and the third linear drive unit 403 can both adopt linear modules.

[0102] The structure of the membrane electrode loading mechanism 7 is the same as that of the bipolar plate loading mechanism, and the specific structure of the membrane electrode loading mechanism 7 will not be introduced here.

[0103] Preferably, as another embodiment of the present invention, Figure 8-Figure 9 As shown, the stacking mechanism 1 comprises:

[0104] The stacking tool 101 has a plurality of limit rods 102 vertically disposed on its upper end, and the plurality of limit rods 102 are arranged to form a stacking cavity;

[0105] A carrier plate 103 is disposed in the stacking cavity; the battery stack is placed on the upper end of the carrier plate 103;

[0106] A driving mechanism is connected to the supporting plate 103 to drive the supporting plate 103 to move up and down in the stacking cavity.

[0107] In this embodiment, multiple limit rods 102 at the upper end of the stacking tooling 101 are arranged to form a stacking cavity, and the supporting plate 103 is arranged in the stacking cavity. The edge limit rods 102 thereof slide and fit together. When the driving mechanism structure drives the supporting plate 103 to move up and down in the stacking cavity, the moving trajectory of the supporting plate 103 is limited by the multiple limit rods 102, so that the supporting plate 103 and the battery stack at the upper end can be stably raised and lowered, thereby maintaining the height of the upper end of the charged stack.

[0108] Preferably, as another embodiment of the present invention, Fig.10 As shown, the driving mechanism comprises:

[0109] Two lifting units 104 are arranged oppositely on both sides of the stacking tool 101;

[0110] Two fourth linear drive units 105, which are respectively connected to the two lifting units 104;

[0111] The two support frames 106 are respectively connected to the two linear drive units in transmission. The lower end of the support plate 103 is provided with a through groove corresponding to the support frame 106. The two fourth linear drive units 105 drive the two support frames 106 to move closer to or away from each other, so that the two support frames 106 extend into the through groove to support the support plate 103, or move out of the through groove to separate from the support plate 103.

[0112] In this embodiment, the two fourth linear drive units 105 drive the two support frames 106 to move closer to or away from each other, and the two support frames 106 extend into the through slot at the lower end of the carrier plate 103 to prop up the carrier plate 103. The two support frames 106 move out of the through slot, so that the carrier plate 103 is separated from the starting mechanism. At this time, the stacking tool 101 and the driving mechanism can be separated to achieve a detachable connection between the stacking tool 101 and the high-precision stacking device for the battery stack. This makes it easy to remove the stacking tool 101 from the high-precision stacking device for the battery stack, transport it, and install a new stacking tool 101 on the high-precision stacking device for the battery stack.

[0113] The lifting unit 104 and the fourth linear drive unit 105 can both adopt linear modules.

[0114] Preferably, as another embodiment of the present invention, the stacking mechanism 1 further includes:

[0115] A lifting platform 107 , on which the stacking tool 101 is placed.

[0116] In this embodiment, a lifting platform 107 is provided below the stacking tool 101 , and the stacking tool 101 is driven to move up and down by the lifting platform 107 , so as to facilitate taking out the stacking tool 101 .

[0117] Preferably, as another embodiment of the present invention, it also includes:

[0118] The plate pressing mechanism 109 includes two sets of pressing components 109 arranged on both sides of the stacking mechanism 1. The pressing components 109 include:

[0119] A fifth linear drive unit 108;

[0120] At least two pressing plates 109 are horizontally arranged and are in transmission connection with the fifth linear drive unit 108 . The fifth linear drive unit 108 drives the pressing plates 109 to move to above the stacking tooling 101 or move away from above the stacking tooling 101 .

[0121] In this embodiment, the fifth linear drive unit 108 drives the pressing plate 109 to move to the upper end of the battery stack, and the pressing plate 109 presses the stacked battery stack to ensure the flatness of the material, facilitate the visual inspection system to take pictures, and improve the visual accuracy.

[0122] The fifth linear drive unit 108 may adopt a linear module.

[0123] The present invention also provides a high-precision stacking method for a battery stack, comprising the following steps:

[0124] S1, moving the bipolar plate on the bipolar plate feeding mechanism 4 to the bipolar plate deviation correction mechanism 3 through the bipolar plate conveying mechanism 5 for deviation correction;

[0125] S2, moving the membrane electrode on the membrane electrode feeding mechanism 7 to the membrane electrode deviation correction mechanism 6 through the membrane electrode conveying mechanism 8 for deviation correction;

[0126] S3, the bipolar plate conveying mechanism 5 and the membrane electrode conveying mechanism 8 move the corrected bipolar plates and membrane electrodes to the stacking mechanism 1 in turn for stacking, and after the bipolar plates or membrane electrodes are moved to the stacking mechanism 1, the bipolar plates or membrane electrodes are inspected by the visual inspection mechanism 2, and the bipolar plates or membrane electrodes that exceed the tolerance are removed from the stacking mechanism 1 by the bipolar plate conveying mechanism 5 and the membrane electrode conveying mechanism 8.

[0127] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A high-precision stacking device for a battery stack, characterized in that: include: Stacking mechanism; A visual inspection mechanism, which is arranged above the stacking mechanism; Bipolar plate deviation correction mechanism; Bipolar plate feeding mechanism; A bipolar plate transport mechanism, which is used to move the bipolar plates on the bipolar plate feeding mechanism to the bipolar plate deviation correction mechanism, and to move the bipolar plates corrected by the bipolar plate deviation correction mechanism to the stacking mechanism; Membrane electrode correction mechanism; Membrane electrode feeding mechanism; The membrane electrode conveying mechanism is used to move the membrane electrode on the membrane electrode loading mechanism to the membrane electrode correction mechanism, and to move the membrane electrode corrected by the membrane electrode correction mechanism to the stacking mechanism.

2. A high-precision stacking device for battery stacks as claimed in claim 1, characterized in that: The bipolar plate transport mechanism comprises: A first linear drive unit; A first bipolar plate transporting assembly is transmission-connected to the first linear drive unit, and the first linear drive unit drives the first bipolar plate transporting assembly to move back and forth above the bipolar plate feeding mechanism, the bipolar plate deviation correcting mechanism and the stacking mechanism.

3. A high-precision stacking device for battery stacks as claimed in claim 2, characterized in that: Also includes: The first out-of-tolerance bipolar plate collecting bin, wherein the first linear drive unit can drive the first bipolar plate transporting assembly to move above the first out-of-tolerance bipolar plate collecting bin.

4. A high-precision stacking device for battery stacks as claimed in claim 3, characterized in that: The first out-of-tolerance bipolar plate collection bin is arranged between the bipolar plate feeding mechanism and the bipolar plate correcting mechanism, the first bipolar plate transporting assembly is set into two groups, the first linear drive unit is a multi-slider linear module, and the two groups of the first bipolar plate transporting assemblies are respectively connected to the two sliders of the multi-slider linear module.

5. A high-precision stacking device for battery stacks as claimed in claim 2, characterized in that: The bipolar plate feeding mechanism comprises: Bipolar plate silo; A second linear drive unit; a third linear drive unit, two ends of which extend respectively to below the bipolar plate transport mechanism and the second linear drive unit; A transfer trolley, the upper end of which is provided with a composite suction cup, and the transfer trolley is transmission-connected to the third linear drive unit; A second out-of-tolerance bipolar plate collection bin, which is disposed between the bipolar plate bin and the third linear drive unit; The second bipolar plate transport assembly is transmission-connected to the second linear drive unit, and the second linear drive unit drives the second bipolar plate transport assembly to move back and forth above the bipolar plate bin, the second out-of-tolerance bipolar plate collection bin and the third linear drive unit.

6. A high-precision stacking device for battery stacks as claimed in claim 2, characterized in that: The stacking mechanism comprises: The stacking tool has a plurality of limit rods vertically disposed on the upper end thereof, and the plurality of limit rods are arranged to form a stacking cavity; A carrying plate, which is arranged in the stacking cavity; A driving mechanism is connected to the supporting plate to drive the supporting plate to move up and down in the stacking cavity.

7. A high-precision stacking device for battery stacks as claimed in claim 6, characterized in that: The driving mechanism comprises: Two lifting units are arranged oppositely on two sides of the stacking tooling; Two fourth linear drive units, which are respectively connected to the two lifting units in a transmission manner; The two support frames are respectively connected to the two linear drive units in a transmission manner. The lower end of the support plate is provided with a through slot corresponding to the support frame. The two fourth linear drive units drive the two support frames to move closer to or away from each other, so that the two support frames extend into the through slot to support the support plate, or move out of the through slot to separate from the support plate.

8. A high-precision stacking device for battery stacks as claimed in claim 6, characterized in that: The stacking mechanism also includes: A lifting platform, on which the stacking tool is placed.

9. A high-precision stacking device for battery stacks as claimed in claim 6, characterized in that: Also includes: The plate pressing mechanism comprises two sets of pressing assemblies arranged opposite to each other on both sides of the stacking mechanism, and the pressing assemblies comprise: A fifth linear drive unit; At least two pressing plates are horizontally arranged and are in driving connection with the fifth linear drive unit, and the fifth linear drive unit drives the pressing plates to move above the stacking tooling or move them away from above the stacking tooling.

10. A high-precision stacking method for a battery stack, characterized in that: The following steps are involved: S1. Move the bipolar plate on the bipolar plate feeding mechanism to the bipolar plate deviation correction mechanism for deviation correction through the bipolar plate conveying mechanism; S2, moving the membrane electrode on the membrane electrode feeding mechanism to the membrane electrode deviation correction mechanism through the membrane electrode conveying mechanism for deviation correction; S3. The bipolar plate conveying mechanism and the membrane electrode conveying mechanism move the corrected bipolar plates and membrane electrodes to the stacking mechanism in turn for stacking. After the bipolar plates or membrane electrodes are moved to the stacking mechanism, the bipolar plates or membrane electrodes are inspected by a visual inspection mechanism, and the bipolar plates or membrane electrodes that exceed the tolerance are removed from the stacking mechanism by the bipolar plate conveying mechanism and the membrane electrode conveying mechanism.

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