Carrying and stacking system and carrying and stacking method for electrode plates with runners

Abstract

The invention relates to the technical field of flow battery manufacturing equipment, in particular to a carrying and stacking system and a carrying and stacking method for electrode plates with runners. The carrying and stacking system for the electrode plates with the flow channels comprises a servo system, the adsorption tool comprises a suction cup frame, the suction cup frame is connected to the servo system, and a suction cup is installed on the suction cup frame; a working surface is arranged at the bottom of the sucker and is provided with a plurality of negative-pressure adsorption ports for adsorbing electrode plates; the gas compensation system comprises a plurality of compensation nozzles, the compensation nozzles are arranged on the adsorption tool, and the multiple compensation nozzles are arranged in the circumferential direction of the working face of the suction cup; and the stacking table is provided with at least one guide plugging rod, the guide plugging rod is vertically arranged and can be lifted up and down, and the guide plugging rod is right opposite to the via holes, where the electrode plates are stacked, in the stacking station. Through the arrangement, under the condition that a servo system and the release height of the electrode plate are not changed, pressure is compensated below the electrode plate, the falling speed of the electrode plate is slowed down, and the electrode plate is protected.

Description

Technical Field

[0001] The invention relates to the technical field of liquid flow battery manufacturing equipment, and in particular to a conveying and stacking system and a conveying and stacking method for flow channel electrode plates. Background Art

[0002] Electrode plates are generally used in electrochemical devices that require uniform distribution of gas or liquid, such as fuel cells, electrolyzers and flow batteries. Typical examples include proton exchange membrane fuel cells (PEMFC), solid oxide fuel cells (SOFC), water electrolysis to produce hydrogen (PEM electrolyzer, alkaline electrolyzer), such as all-vanadium redox flow batteries (VRFB).

[0003] Electrode plates are usually made of porous carbon materials or their composite materials. Common materials include:

[0004] (1) Carbon Fiber Felt: It is a soft carbon-based material with a large specific surface area and good conductivity. Its porous structure is conducive to the flow of electrolyte and ion exchange.

[0005] (2) Graphite Felt: Similar to carbon fiber felt, but with a higher degree of graphitization, stronger conductivity and corrosion resistance. A high degree of graphitization helps improve electrochemical performance.

[0006] (3) Carbon Paper: It has a smooth surface and high mechanical strength, and is suitable for some flow batteries with higher requirements. It has good conductivity but a small specific surface area.

[0007] (4) Activated Carbon-Coated Electrode: A layer of activated carbon is coated on the surface of the carbon-based material to further increase the specific surface area and catalytic activity.

[0008] (5) Composite Materials: Metal oxides, polymers or other conductive additives are introduced into carbon-based materials to improve performance.

[0009] The electrode plate is provided with flow channels, which are used to transport the reaction medium or to transport the reaction gas (such as hydrogen, oxygen or air) to the electrode catalyst layer, while removing the by-product (water) generated by the reaction. Common designs of the flow channels on the surface of the electrode plate include straight line, serpentine, grid, diamond, etc. It needs to be optimized according to the specific application. The flow channel design can ensure the uniform flow of the electrolyte on the electrode surface, promote the efficient exchange of the reaction substances, optimize the fluid distribution, reduce the local concentration polarization, and improve the battery performance. Therefore, the integrity of the flow channel structure will affect the functional integrity and performance of the battery.

[0010] The electrochemical reaction in the battery takes place on the surface of the electrode. In order to maximize the specific surface area, the electrode plate is usually processed into a very thin plate. However, reducing the thickness of the electrode plate will lead to a decrease in its own mechanical strength. Therefore, the electrode plate needs additional protection during both the processing and assembly process. During assembly and use, a frame is added to the electrode plate, called an electrode frame. The extrusion prestress of the battery stack to prevent leakage is borne by the electrode frame, and the electrode frame protects the electrode plate from being crushed and damaged. During processing and production, the electrode plates need to be transported and transferred to different workstations. Mechanical fixtures are avoided during transportation, and suction cup fixtures that exert less stress on the workpiece are often used.

[0011] However, when using suction cup tooling to transport and stack electrode plates, there is still a certain probability of damaging the electrode plates. After the flow channels on the electrode plates are processed, the flow channels of the electrode plates may be bumped or scratched. Summary of the invention

[0012] In order to overcome the problem that the existing transport and stacking tools are prone to damage the electrode plates when stacking the electrode plates with flow channels, the present invention provides a transport and stacking system for the electrode plates with flow channels, the transport and stacking system for the electrode plates with flow channels comprises:

[0013] Servo system drives the adsorption tooling to move;

[0014] The adsorption tool is used for adsorbing / releasing the electrode plate. The adsorption tool comprises a suction cup frame, which is connected to the servo system and on which a suction cup is mounted. A flat working surface is arranged at the bottom of the suction cup, and a plurality of negative pressure adsorption ports are provided on the working surface for adsorbing the electrode plate.

[0015] The gas compensation system includes a plurality of compensation nozzles, which are arranged on the adsorption tooling, and the plurality of compensation nozzles are arranged circumferentially around the working surface of the suction cup;

[0016] The stacking platform is provided with at least one guide blocking rod, which is vertically arranged and can be lifted up and down, and the guide blocking rod is directly opposite to the through holes of the stacked electrode plates on the stacking station.

[0017] In some embodiments, the gas compensation system further includes a first lifting drive, which is mounted on the suction cup frame, and an actuator end of the first lifting drive is connected to the compensation nozzle for driving the compensation nozzle to move up and down.

[0018] In some embodiments, the gas compensation system further includes a lifting baffle, the execution end of the first lifting driver is connected to the lifting baffle, and the compensation nozzle is mounted on the lifting baffle;

[0019] The lifting baffle is annular and arranged around the electrode plate, and a plurality of compensation nozzles are arranged at intervals on the annular lifting baffle, and the jets of the compensation nozzles are horizontally aligned with the inner side of the annular bracket;

[0020] The lifting baffle is provided with a mounting pipe, the compensating nozzle is fixed in the mounting pipe, and the axial direction of the mounting pipe opening is consistent with the jetting direction of the compensating nozzle.

[0021] In some embodiments, a second lifting driver is disposed on the suction cup frame, an execution end of the second lifting driver is connected to the suction cup, and the second lifting driver drives the suction cup to move up and down.

[0022] In some embodiments, the stacking table has a plurality of stacking stations for stacking the electrode plates, and a plurality of guide blocking rods are arranged at the stacking stations. The guide blocking rods are slidably mounted on the stacking table, and the axis of the guide blocking rods is coaxially arranged with the axis of the through hole of the stacking electrode plate;

[0023] A third lifting driver is arranged on the stacking table, an execution end of the third lifting driver is connected to the guide blocking rod, and the third lifting driver drives the guide blocking rod to move up and down;

[0024] A sensor is arranged on the stacking table, and the sensor is used to detect the height of the stacked electrode plates on the stacking station.

[0025] In some embodiments, the transport and stacking system further includes a reversing valve and a vacuum generator, and the transport and stacking system has an adsorption station and a release station;

[0026] The reversing valve can switch between the adsorption position and the release position; the air inlet of the reversing valve is connected to the positive pressure air source;

[0027] Adsorption station: the air flow from the positive pressure air source is guided to the vacuum generator through the first air outlet of the reversing valve, and the vacuum generator generates negative pressure and communicates with the negative pressure adsorption port through the air flow channel;

[0028] Release station: The air flow from the positive pressure air source is guided to the compensating nozzle through the second air outlet of the reversing valve and is ejected from the compensating nozzle.

[0029] In some embodiments, the vacuum generator includes a main flow channel and a negative pressure flow channel, the inlet section of the main flow channel is connected to the air outlet of the reversing valve adsorption station, the main flow channel has a flow channel contraction portion, a side hole is provided on the side wall of the flow channel contraction portion, one end of the negative pressure flow channel is connected to the side hole, and the other end is connected to the negative pressure adsorption port;

[0030] The suction cup has a pressure chamber inside, one end of the negative pressure channel away from the main channel is connected to the pressure chamber, and the negative pressure adsorption port is in communication with the pressure chamber.

[0031] In some embodiments, the second air outlet is also connected to a positive pressure ventilation branch tube, and the positive pressure ventilation branch tube is connected to the negative pressure chamber.

[0032] In some embodiments, a blocking structure is provided on the negative pressure flow channel, and the blocking structure cuts off the negative pressure flow channel when the work station is released.

[0033] The present invention also provides a method for transporting and stacking using the transporting and stacking system provided above, comprising the following steps:

[0034] a. The servo system drives the adsorption tooling to move to the top of the electrode plate to be adsorbed;

[0035] b. The negative pressure adsorption port maintains the negative pressure adsorption state, and at the same time, the servo system drives the adsorption tooling to move downward to the bottom working surface of the suction cup to contact the electrode plate to be adsorbed;

[0036] c. The negative pressure adsorption port maintains a negative pressure adsorption state, and the adsorption tool carries the adsorbed electrode plate to be moved to the top of the stacking table, and there is a gap between the adsorbed electrode plate and the stacked electrode plates below;

[0037] d. The guide plugging rod rises to a height higher than the top surface of the stacked electrode plates; the negative pressure adsorption port cancels the negative pressure, releases the adsorbed electrode plate, and opens the compensation nozzle at the same time; the adsorbed electrode plate falls due to gravity, and the compensation nozzle surrounding the electrode plate sprays gas toward the bottom of the electrode plate, and the ejected gas enters the gap between the falling electrode plate and the stacked electrode plates below to form a high-pressure area;

[0038] e. In step d, after the falling electrode plate lands on the stacked electrode plate pile, the compensating nozzle is closed.

[0039] Discovery of technical issues and their causes:

[0040] Problem description: When producing brittle thin plate parts (such as chips, solar panels), they need to be transferred and transported between different workstations. Some scenarios, such as assembly, have high requirements for the accuracy of the release position, while some scenarios, such as transfer and palletizing, have lower requirements for the accuracy of the release position.

[0041] For scenes with high release accuracy requirements, the servo system will use high-precision and high-cost industrial robots or high-precision guide rails, etc. For scenes with low release accuracy requirements, the servo system can use a pneumatic component servo system with lower cost and faster response speed.

[0042] Since the precision of the pneumatic servo system is not high, a certain gap needs to be reserved between the adsorption tooling and the load-bearing surface below (the workstation table / the top surface of the stacked thin plates below) when releasing the thin plates. The gap is not designed to be particularly large. According to experience, it is usually released a few centimeters away from the load-bearing surface to ensure a high yield rate.

[0043] The materials used in electrode plates, such as carbon fiber felt and composite materials, have higher mechanical strength than wafers and solar panels. According to conventional thinking, releasing electrode plates from a height of several centimeters using traditional technical means should not damage the electrode plates. However, according to traditional technical means, releasing electrode plates from a height of several centimeters allows the electrode plates to fall freely. During actual stacking and handling operations, there is a certain probability that the electrode plates will be damaged, and the yield rate of electrode plates is even lower than that of solar panels.

[0044] In order to solve the problem of damage to the electrode plate when releasing it, the general idea is to lower the release height and release the electrode plate from a height close to or even close to the bottom bearing surface. This requires the use of a more precise servo system, which will increase the cost of the entire production line.

[0045] Cause of the problem: Through our research, we found that there are two main reasons for the damage of the electrode plate:

[0046] 1. It is related to the appearance of the electrode plate itself: the surface of the plate such as the wafer and the battery plate is flat. The plate falls in a horizontal posture, and the gap between the bottom surface of the plate and the bearing surface below (the upper surface of the plate already stacked below or the table of the workstation) gradually decreases. The air in the gap between the plate and the bearing surface will be discharged from all sides. As the gap gradually decreases, the process of discharging the surrounding air will become more difficult, so a protective high-pressure air cushion is formed between the released plate and the bearing surface, thereby slowing down the falling speed of the plate.

[0047] 1.1 The surface of the electrode plate is provided with flow channels, which make the air discharge process between the electrode plate and the bearing surface smoother and weaken the high-pressure air cushion in the middle.

[0048] 1.2 There are many vias on the electrode plate (for fixing the electrode plate, installing the electrode frame, passing the pipeline, etc.). During the falling process of the electrode plate, the air between the electrode plate and the bearing surface will be discharged from the vias, further weakening the high-pressure air cushion in the middle.

[0049] Therefore, when releasing the electrode plate from the same height, the falling speed of the electrode plate is much faster than that of a flat plate. Even if the electrode plate falls faster, a height of several centimeters will not damage the overall structure of the electrode plate. After counting the damaged electrode plates, it was found that the damage mainly occurred in the flow channel of the electrode plate, which leads to the second reason.

[0050] 2. The strength of the flow channel wall of the electrode plate is low: Although the mechanical strength of the electrode plate itself is higher than that of the chip, it has many tiny flow channels, and the flow channel walls are relatively thin, which are easily damaged when bumped.

[0051] Solution:

[0052] The application of the inconvenient system for transporting electrode plates with flow channels provided by the present invention has the following effects:

[0053] In the process of releasing the electrode plate, air is blown into the gap between the falling electrode plate and the bearing surface (the electrode plates stacked below) through a number of compensation nozzles arranged around the electrode plate, thereby slowing down the escape speed around the gap between the empty electrode plate and the bearing surface, and artificially creating a high-pressure area under the falling electrode plate. On the other hand, a guide blocking rod that can be raised and lowered is arranged on the stacking table. The guide blocking rod is inserted into the through hole of the electrode plate to prevent air from escaping upward from the through hole and to guide and position the electrode plate. The gas pressure below the electrode plate increases, and the pressure difference formed between the upper and lower parts will lift the electrode plate, slowing down the falling speed of the electrode plate, thereby protecting the electrode plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the state of the transport and stacking system with flow channel electrode plates of the present invention at the adsorption station;

[0055] Figure 2 It is a schematic diagram of the state of the transport and stacking system with flow channel electrode plates of the present invention when releasing the workstation;

[0056] Figure 3 This is the simulation result diagram of the vacuum generator;

[0057] Figure 4 It is a schematic diagram of the airflow direction during the falling process of the electrode plate;

[0058] Figure 5 This is the result diagram of the gas compensation system simulation.

[0059] Attached Figure 1-5 The blue arrows indicate the direction of airflow.

[0060] Description of Reference Numerals

[0061] 1-adsorption tooling, 1a-suction cup frame, 1b-suction cup, 1c-working surface, 1d-negative pressure adsorption port, 1e-negative pressure maintaining valve, 1f-second lifting drive;

[0062] 2-gas compensation system, 2a-compensation nozzle, 2b-lifting baffle, 2c-first lifting drive, 2d-installation pipeline;

[0063] 3-stacking table, 3a-guiding blocking rod, 3b-third lifting drive;

[0064] 4-vacuum generator, 4a-main channel, 4b-channel contraction, 4c-negative pressure channel, 4d-pressure chamber;

[0065] 5-Electrode plates. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0067] The present invention provides a conveying and stacking system for an electrode plate with a flow channel 5 , wherein the conveying and stacking system for an electrode plate with a flow channel 5 comprises a servo system, an adsorption tool 1 , a gas compensation system 2 and a stacking table 3 .

[0068] The servo system is used to drive the adsorption tool 1 to move, and the existing technology can be used. Its specific structure and working principle are taught in the existing technology, such as three-axis servo guide rails, manipulators, cylinders, hydraulic cylinders, etc. It should be noted that the technical solution of this application has low requirements on the operating accuracy of the servo system.

[0069] The adsorption tool 1 is used to adsorb / release the electrode plate 5. The adsorption tool 1 includes a suction cup frame 1a. The suction cup frame 1a is connected to a servo system. A suction cup 1b is installed on the suction cup frame 1a, and a flat working surface 1c is arranged at the bottom of the suction cup 1b, and the working surface 1c is provided with a plurality of negative pressure adsorption ports 1d for adsorbing the electrode plate 5. The negative pressure adsorption port 1d is arranged on a flat part of the electrode plate 5 where no flow channel is arranged. A plurality of negative pressure adsorption ports 1d are arranged. The suction cup frame 1a is used as an installation platform to connect to the interface of the servo system, and connect positive pressure and / or negative pressure gas sources, PLC controllers and other components. The negative pressure adsorption port 1d needs to be connected to the negative pressure gas source to function normally.

[0070] like Figure 5 As shown, Figure 5 The redder the color, the greater the pressure, and the bluer the color, the smaller the pressure. It can be seen that a pressure difference is formed on the upper and lower surfaces of the falling electrode plate 5. The gas compensation system 2 includes a plurality of compensation nozzles 2a. The compensation nozzles 2a are arranged on the adsorption tooling 1. A plurality of compensation nozzles 2a are arranged circumferentially around the working surface 1c of the suction cup 1b. Specifically, the working surface 1c of the suction cup 1b has a station for adsorbing the electrode plate 5. When the suction cup 1b is working, the electrode plate 5 is adsorbed at a specific position on the working surface 1c of the suction cup 1b. The compensation nozzle 2a is annular and is arranged around the electrode plate 5 on the working surface 1c, that is, the compensation nozzle 2a is annular and is arranged around the electrode plate 5 station on the working surface 1c. The jet direction of the compensation nozzle 2a is aligned with the center of the electrode plate 5.

[0071] The stacking table 3 has a stacking station for stacking the electrode plates 5. The stacking table 3 is provided with at least one guide blocking rod 3a. The guide blocking rod 3a is arranged vertically and can be lifted up and down. The guide blocking rod 3a is directly opposite to the through hole of the stacked electrode plates 5 on the stacking station. The stacking table 3 is mainly used to carry the stacked electrode plates 5. After the electrode plates 5 on the upper surface of the stacking table 3 are stacked into piles, operations such as packaging, packaging and transportation are performed.

[0072] First lifting drive 2c:

[0073] like Figure 4 and Figure 5 As shown, in order to more smoothly replenish air into the gap between the electrode plate 5 and the bearing surface (the upper surface of the stacked electrode plates 5 below), preferably, when the compensation nozzle 2a is working (releasing the station), the height of the compensation nozzle 2a is kept in the middle of the gap, and the compensation nozzle 2a sprays air inward horizontally.

[0074] When the electrode plate 5 is released from the suction cup 1b, the bearing surface below does not move, and the gravity and air resistance on the electrode plate 5 gradually decrease, so the gap between the electrode plate 5 and the bearing surface below gradually decreases, and the center plane height of the gap also decreases with the descent of the electrode plate 5. Therefore, as the electrode plate 5 continues to fall, the compensation nozzle 2a needs to continuously lower its own height.

[0075] like Figure 1 and Figure 2 As shown, the gas compensation system 2 also includes a first lifting driver 2c. The first lifting driver 2c is installed on the suction cup frame 1a. The execution end of the first lifting driver 2c is connected to the compensation nozzle 2a, which can drive the compensation nozzle 2a to move up and down. The first lifting driver 2c, the second lifting driver 1f, and the third lifting driver 3b are all linear servo actuators, which can specifically adopt linear servo motors or electric cylinders.

[0076] like Figure 2 As shown, the gas compensation system 2 also includes a lifting baffle 2b. The execution end of the first lifting driver 2c is connected to the lifting baffle 2b. The compensation nozzle 2a is installed on the lifting baffle 2b. The lifting baffle 2b is annular and is arranged around the electrode plate 5. A plurality of compensation nozzles 2a are arranged at intervals on the annular lifting baffle 2b. The lifting baffle 2b is slightly larger than the outline of the electrode plate 5, and the lifting baffle 2b will reserve a narrow gap with the edge of the electrode plate 5. The gas in the gap between the electrode plate 5 and the bearing surface will be blocked by the lifting baffle 2b during the overflow process, thereby slowing down the gas overflow speed.

[0077] The compensation nozzle 2a sprays air horizontally toward the inner side of the annular bracket. The lifting baffle 2b is provided with a mounting pipe 2d. The compensation nozzle 2a is fixed in the mounting pipe 2d, and the axial direction of the opening of the mounting pipe 2d is consistent with the spray direction of the compensation nozzle 2a.

[0078] Guide blocking rod 3a:

[0079] The stacking table 3 has a plurality of stacking stations for stacking the electrode plates 5. A plurality of guide blocking rods 3a are arranged at the stacking stations. The guide blocking rods 3a are slidably mounted on the stacking table 3. The axis of the guide blocking rods 3a is coaxially arranged with the axis of the through hole of the stacking electrode plate 5. The execution end of the third lifting driver 3b is arranged on the stacking table 3 and connected to the guide blocking rods 3a. The third lifting driver 3b is used to drive the guide blocking rods 3a to move up and down.

[0080] Before the electrode plate 5 falls onto the guide rod, the electrode plate 5 lacks effective restraint. In order to prevent the electrode plate 5 from tilting in the left and right directions, the position of the electrode plate 5 is restrained as soon as possible. Therefore, at the same time as the electrode plate 5 is released, or before the electrode plate 5 is released, the third lifting driver 3b drives the guide blocking rod 3a to move upward, so that the guide rod can penetrate into the through hole of the electrode plate 5 as soon as possible. Since the servo system can use a pneumatic servo system with low precision, in order to avoid the collision between the guide rod and the working surface 1c of the suction cup 1b, such as Figure 1 and Figure 2 As shown, a second lifting driver 1f is provided on the suction cup frame 1a. The execution end of the second lifting driver 1f is connected to the suction cup 1b. The second lifting driver 1f drives the suction cup 1b to move up and down. When the suction cup 1b releases the working surface 1c, the second lifting driver 1f drives the suction cup 1b to move upward to avoid the guide blocking rod 3a.

[0081] In order to accurately control the relative height between the guide blocking rod 3 a and the stacked electrode plates 5 , a sensor is provided on the stacking table 3 to detect the height of the stacked electrode plates 5 at the stacking station.

[0082] Air pressure pipeline design:

[0083] Reversing valve: The handling and stacking system also includes a reversing valve and a vacuum generator 4. The handling and stacking system has an adsorption station and a release station. The reversing valve can switch between the adsorption station and the release station. The air inlet of the reversing valve is connected to the positive pressure air source. The reversing valve adopts an electromagnetically controlled reversing valve. Since the negative pressure adsorption port 1d needs to be connected to the negative pressure source to work normally, and the compensation nozzle 2a needs to be connected to the positive pressure air source, the handling and stacking system of the present application is provided with a vacuum generator 4 as a negative pressure air source. The handling and stacking system only needs to be connected to a positive pressure air source.

[0084] Adsorption station: The airflow from the positive pressure air source is guided to the vacuum generator 4 via the first air outlet of the reversing valve flow, and the vacuum generator 4 generates negative pressure and communicates with the negative pressure adsorption port 1d through the airflow channel.

[0085] Release position: The airflow from the positive pressure air source is guided to the compensation nozzle 2a through the second air outlet of the reversing valve, and is ejected from the compensation nozzle 2a.

[0086] Vacuum generator 4: Figure 3 As shown in the simulation result diagram, the vacuum generator 4 includes a main channel 4a and a negative pressure channel 4c. The inlet section of the main channel 4a is connected to the air outlet of the air flow switcher adsorption station. The main channel 4a has a channel contraction portion 4b, and a side hole is opened on the side wall of the channel contraction portion 4b. One end of the negative pressure channel 4c is connected to the side hole, and the other end is connected to the negative pressure adsorption port 1d.

[0087] In the present invention, the main channel 4a is formed between the lower surface of the suction cup frame 1a and the upper surface of the suction cup 1b. The left and right sides of the main channel 4a can be constrained by elastic materials such as organ rubber strips. The suction cup 1b has a pressure chamber 4d, and the end of the negative pressure channel 4c away from the main channel 4a is connected to the pressure chamber 4d, and the negative pressure suction port 1d is connected to the pressure chamber 4d.

[0088] exist Figure 3 In the diagram, the red part represents the ambient pressure (one atmosphere), and the bluer the color, the lower the pressure. Figure 3 It can be seen that the main channel 4a forms an obvious low-pressure area at the channel contraction portion 4b, and the negative pressure channel 4c is connected to this low-pressure area. The pressure in the pressure chamber 4d will leak from the negative pressure channel 4c, so that the entire pressure chamber 4d maintains a negative pressure state. The pressure chamber 4d is directly connected to the negative pressure adsorption port 1d, and the negative pressure adsorption port 1d is maintained in an adsorption state.

[0089] The flow channel contraction portion 4b is formed as follows Figure 1 As shown, a flexible rubber block is provided at the top of the main channel 4a (the lower surface of the suction cup frame 1a) or the bottom of the main channel 4a (the upper surface of the suction cup 1b) to form a flow channel contraction portion 4b.

[0090] A plurality of negative pressure adsorption ports 1d are arranged on the working surface 1c. Several negative pressure adsorption ports 1d are connected to the same pressure chamber 4d. A negative pressure maintaining valve 1e is installed in the negative pressure adsorption port 1d. The negative pressure maintaining valve 1e comprises a stepped hole, a valve cover and an elastic member. The aperture of the upper hole section of the stepped hole is small, and the aperture of the lower hole section is large. The diameter of the valve cover is larger than the upper hole section and smaller than the lower hole section. The valve cover is installed in the lower hole section through an elastic member, and a gap is reserved between the valve cover and the side wall of the lower hole section. The external airflow flows into the pressure chamber 4d through the pressure maintaining valve, and the valve cover overcomes the elastic force of the elastic member and clings to the shoulder of the stepped hole to block the stepped hole.

[0091] Positive pressure ventilation branch: The second air outlet is also connected to the positive pressure ventilation branch, and the positive pressure ventilation branch is connected to the negative pressure chamber. The electrode plate 5 is close to the working surface 1c of the suction cup 1b. Due to van der Waals force or electrostatic adsorption and other reasons, the electrode plate 5 will have a certain adsorption and adhesion on the suction cup 1b, which will cause the electrode plate 5 not to fall after the negative pressure of the negative pressure adsorption port 1d disappears. Therefore, the adsorption tool 1 also includes a positive pressure ventilation pipe, one end of which is connected to the negative pressure adsorption port 1d and connected to the second air outlet of the reversing valve. When the workstation is released, the gas is ejected from the second air outlet, and part of the air flow is guided into the negative pressure adsorption port 1d through the positive pressure ventilation branch, so that the negative pressure adsorption port 1d is in a positive pressure state, overcoming the adhesion and adsorption of the electrode plate 5 to the working surface 1c of the suction cup 1b, and pushing the electrode plate 5 away from the working surface 1c.

[0092] Blocking structure: A blocking structure is provided on the negative pressure flow channel 4c. The blocking structure cuts off the negative pressure flow channel 4c when the station is released. Specifically, Figure 1 As shown, the side hole is directly opened on the rubber block or aligned with the rubber block. When the workstation is released, after the suction cup 1b moves upward, the side hole will press against the flow channel contraction portion 4b, thereby blocking the side hole and preventing the positive pressure injected into the pressure chamber 4d by the positive pressure ventilation branch pipe from escaping from the side buckle through the negative pressure ventilation pipe.

[0093] The present invention also provides a method for transporting and stacking using the transporting and stacking system with flow channel electrode plates as described above, comprising the following steps:

[0094] a. The servo system drives the adsorption tool 1 to move to the top of the electrode plate 5 to be adsorbed. In the initial state, the height of the guide blocking rod 3a is higher than the height of the stacked electrode plates 5 on the stacking table 3, and the top of the guide blocking rod 3a extends above the stacked electrode plates 5.

[0095] b. The negative pressure adsorption port 1d maintains the negative pressure adsorption state, and at the same time, the servo system drives the adsorption tool 1 to move downward to the bottom working surface 1c of the suction cup 1b to contact the electrode plate 5 to be adsorbed. At this time, the negative pressure adsorption port 1d adsorbs the electrode plate 5.

[0096] c. The negative pressure adsorption port 1d maintains a negative pressure adsorption state, and the adsorption tool 1 carries the adsorbed electrode plate 5 and moves to the top of the stacking table 3, with a gap between the adsorbed electrode plate 5 and the stacked electrode plates 5 below.

[0097] When the adsorption tooling 1 moves with the electrode plate 5 to the top of the stacking table 3 , the guide blocking rod 3 a moves downward to the top and is flush with the top of the stacked electrode plates 5 , thereby preventing the extended guide blocking rod 3 a from colliding with the moving adsorption tooling 1 .

[0098] d. The guide blocking rod 3a rises to a height higher than the top surface of the stacked electrode plates 5. Then, the negative pressure adsorption port 1d cancels the negative pressure, releases the adsorbed electrode plate 5, and opens the compensation nozzle 2a at the same time. The adsorbed electrode plate 5 falls due to gravity, and the compensation nozzle 2a surrounding the electrode plate 5 sprays gas toward the bottom of the electrode plate 5. The sprayed gas enters the gap between the falling electrode plate 5 and the stacked electrode plates 5 below to form a high-pressure area.

[0099] Furthermore, step d specifically includes the following steps:

[0100] d-1. The guide blocking rod 3a rises for the first time, so that the guide blocking rod 3a rises to a height higher than the top surface of the stacked electrode plates 5.

[0101] d-2. The first lifting driver 2c drives the lifting baffle 2b and the compensation nozzle 2a to descend, and the height of the compensation nozzle 2a is lowered to be between the electrode plate 5 on the suction cup 1b and the bearing surface (the top surface of the stacked electrode plates 5 below).

[0102] d-3. The negative pressure adsorption port 1d cancels the negative pressure, releases the adsorbed electrode plate 5, and opens the compensation nozzle 2a at the same time.

[0103] The specific operation is that the outlet direction of the reversing valve is changed from the first outlet to the second outlet. The first outlet is cut off to stop the vacuum generator 4 from working, and the negative pressure of the negative pressure adsorption port 1d disappears. Most of the gas ejected from the second outlet is directed to the compensation nozzle 2a, and is ejected from the compensation nozzle 2a to between the electrode plate 5 and the bearing surface. A small part of the gas flows to the pressure chamber 4d through the positive pressure ventilation branch pipe, making the pressure chamber 4d positive pressure, and the air pressure of the negative pressure adsorption port 1d also becomes positive pressure, pushing the adsorbed electrode plate 5 away from the working surface 1c.

[0104] d-4. The electrode plate 5 falls due to gravity, and the first lifting driver 2c drives the compensating nozzle 2a to fall with the electrode plate 5, so that the height of the compensating nozzle 2a is maintained between the falling electrode plate 5 and the bearing surface. At the same time, the third lifting driver 3b drives the guide blocking rod 3a to rise for the second time, and the second lifting driver 1f drives the suction cup 1b to move upward. The first rise and the second rise of the guide blocking rod 3a can be a continuous process.

[0105] e. After the falling electrode plate 5 falls on the stacked electrode plate 5 in step d, the compensating nozzle 2a is closed. The specific operation method is opposite to d-3, and the outlet of the reversing valve is turned from the second outlet to the first outlet.

[0106] Repeat the above steps a to e to complete the stacking operation of the electrode plates 5 .

[0107] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A transport and stacking system with flow channel electrode plates, characterized in that: include: A servo system drives the adsorption tool (1) to move; The adsorption tool (1) is used for adsorbing / releasing the electrode plate (5), and the adsorption tool (1) comprises a suction cup frame (1a), wherein the suction cup frame (1a) is connected to a servo system, and a suction cup (1b) is installed on the suction cup frame (1a); a flat working surface (1c) is arranged at the bottom of the suction cup (1b), and the working surface (1c) is provided with a plurality of negative pressure adsorption ports (1d) for adsorbing the electrode plate (5); A gas compensation system (2) comprises a plurality of compensation nozzles (2a), wherein the compensation nozzles (2a) are arranged on the adsorption tooling (1), and the plurality of compensation nozzles (2a) are arranged circumferentially around a working surface (1c) of a suction cup (1b); The stacking platform (3) is provided with at least one guide blocking rod (3a), the guide blocking rod (3a) is arranged vertically and can be lifted up and down, and the guide blocking rod (3a) is directly opposite to the through hole of the stacked electrode plates (5) on the stacking station.

2. The transport and stacking system of the flow channel electrode plate according to claim 1, characterized in that: The gas compensation system (2) further comprises a first lifting driver (2c), the first lifting driver (2c) being mounted on the suction cup frame (1a), the execution end of the first lifting driver (2c) being connected to the compensation nozzle (2a) and being used to drive the compensation nozzle (2a) to move up and down.

3. The transport and stacking system of the flow channel electrode plate according to claim 2, characterized in that: The gas compensation system (2) further comprises a lifting baffle (2b), the execution end of the first lifting driver (2c) is connected to the lifting baffle (2b), and the compensation nozzle (2a) is mounted on the lifting baffle (2b); The lifting baffle (2b) is annular and arranged around the electrode plate (5); a plurality of compensation nozzles (2a) are arranged at intervals on the annular lifting baffle (2b); the compensation nozzles (2a) spray air laterally toward the inner side of the annular bracket; The lifting baffle (2b) is provided with a mounting pipe (2d), the compensating nozzle (2a) is fixed in the mounting pipe (2d), and the axial direction of the opening of the mounting pipe (2d) is consistent with the jetting direction of the compensating nozzle (2a).

4. The transport and stacking system of the flow channel electrode plate according to claim 1, characterized in that: A second lifting driver (1f) is arranged on the suction cup frame (1a); an execution end of the second lifting driver (1f) is connected to the suction cup (1b); and the second lifting driver (1f) drives the suction cup (1b) to move up and down.

5. The transport and stacking system of the flow channel electrode plate according to claim 1, characterized in that: The stacking table (3) has a plurality of stacking stations for stacking the electrode plates (5), and a plurality of guide blocking rods (3a) are arranged at the stacking stations. The guide blocking rods (3a) are slidably mounted on the stacking table (3), and the axes of the guide blocking rods (3a) are coaxially arranged with the axes of the through holes of the stacking electrode plates (5); A third lifting driver (3b) is arranged on the stacking platform (3), an execution end of the third lifting driver (3b) is connected to the guide blocking rod (3a), and the third lifting driver (3b) drives the guide blocking rod (3a) to move up and down; A sensor is arranged on the stacking table (3), and the sensor is used to detect the height of the stacked electrode plates (5) on the stacking station.

6. The system for transporting and stacking flow channel electrode plates according to claim 1, characterized in that: The transport and stacking system further comprises a reversing valve and a vacuum generator (4), and the transport and stacking system comprises an adsorption station and a release station; The reversing valve can switch between the adsorption position and the release position; the air inlet of the reversing valve is connected to the positive pressure air source; Adsorption station: the air flow from the positive pressure air source is guided to the vacuum generator (4) via the first air outlet of the reversing valve flow, and the vacuum generator (4) generates negative pressure and communicates with the negative pressure adsorption port (1d) through the air flow channel; Release station: the air flow from the positive pressure air source is guided to the compensating nozzle (2a) via the second air outlet of the reversing valve, and is ejected from the compensating nozzle (2a).

7. The transport and stacking system of the flow channel electrode plate according to claim 6, characterized in that: The vacuum generator (4) comprises a main flow channel (4a) and a negative pressure flow channel (4c), the inlet section of the main flow channel (4a) is connected to the gas outlet of the reversing valve adsorption station, the main flow channel (4a) has a flow channel contraction portion (4b), a side hole is provided on the side wall of the flow channel contraction portion (4b), one end of the negative pressure flow channel (4c) is connected to the side hole, and the other end is communicated with the negative pressure adsorption port (1d); The suction cup (1b) has a pressure chamber (4d) therein, one end of the negative pressure channel (4c) away from the main channel (4a) is connected to the pressure chamber (4d), and the negative pressure suction port (1d) is in communication with the pressure chamber (4d).

8. The system for transporting and stacking flow channel electrode plates according to claim 7, characterized in that: The second air outlet is also communicated with the positive-pressure ventilation branch tube, and the positive-pressure ventilation branch tube is communicated with the negative-pressure cavity.

9. The system for transporting and stacking the flow channel electrode plate according to claim 8, characterized in that: A blocking structure is provided on the negative pressure flow channel (4c), and the blocking structure cuts off the negative pressure flow channel (4c) when the work station is released.

10. A method for transporting and stacking the transporting and stacking system of the electrode plate with flow channel according to any one of claims 1 to 9, characterized in that: The transport and stacking method comprises the following steps: a. The servo system drives the adsorption tool (1) to move to the position directly above the electrode plate (5) to be adsorbed; b. The negative pressure adsorption port (1d) maintains a negative pressure adsorption state, and at the same time, the servo system drives the adsorption tooling (1) to move downward to the bottom working surface (1c) of the suction cup (1b) to contact the electrode plate (5) to be adsorbed; c. The negative pressure adsorption port (1d) maintains a negative pressure adsorption state, and the adsorption tool (1) carries the adsorbed electrode plate (5) and moves to the top of the stacking table (3), with a gap between the adsorbed electrode plate (5) and the stacked electrode plates (5) below; d. The guide blocking rod (3a) rises to a height above the top surface of the stacked electrode plates (5); the negative pressure adsorption port (1d) cancels the negative pressure, releases the adsorbed electrode plate (5), and simultaneously opens the compensation nozzle (2a); the adsorbed electrode plate (5) falls due to gravity, and the compensation nozzle (2a) surrounding the electrode plate (5) sprays gas toward the bottom of the electrode plate (5), and the sprayed gas enters the gap between the falling electrode plate (5) and the stacked electrode plates (5) below to form a high-pressure area; e. In step d, after the falling electrode plate (5) falls on the stacked electrode plates (5), the compensating nozzle (2a) is closed.

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