Adsorption tool with runner electrode plate and working method

Abstract

The invention relates to the technical field of flow battery production, in particular to an adsorption tool with a runner electrode plate and a working method. The adsorption tool comprises a suction cup frame, and a suction cup is installed on the suction cup frame; the bottom of the suction cup is provided with a flat-plate-shaped working surface, and the working surface is provided with a plurality of negative pressure adsorption ports for adsorbing the electrode plates; and at least one compensation nozzle is arranged on the working surface and is aligned with a via hole of the electrode plate. The working method comprises the steps that a, the adsorption tool is moved to the position over the to-be-adsorbed electrode plate; b, the negative-pressure adsorption port keeps a negative-pressure adsorption state, and the bottom working face of the suction cup makes contact with the to-be-sucked electrode plate; c, the adsorption tool moves to a release station, d, the negative pressure adsorption opening removes the negative pressure, the adsorbed electrode plate is released, and meanwhile the compensation spray head is started. 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 production, and in particular to an adsorption tool with a flow channel electrode plate and a working method. 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] 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] Graphite Felt: Similar to carbon fiber felt, but with a higher degree of graphitization, better conductivity and corrosion resistance. High degree of graphitization helps improve electrochemical performance.

[0006] 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] 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] 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, so 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] 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] The purpose of the present invention is to overcome the problem that a suction cup-type tooling fixture is prone to knocking and damaging the flow channel of an electrode plate with a flow channel during the process of releasing the electrode plate with a flow channel. An adsorption tooling for an electrode plate with a flow channel is provided. The adsorption tooling can perform gas compensation to form an air cushion during the process of releasing the electrode plate, thereby slowing down the falling speed of the electrode plate and avoiding damage to the electrode plate.

[0013] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides an adsorption tooling with a flow channel electrode plate, comprising: a suction cup frame, which is connected to a servo system and on which a suction cup is mounted; a suction cup, a flat working surface is arranged at the bottom of the suction cup, and the working surface has a plurality of negative pressure adsorption ports for adsorbing the electrode plate; at least one compensation nozzle is arranged on the working surface, and the compensation nozzle is aligned with the through hole of the electrode plate.

[0014] In some embodiments, the adsorption tool further includes an airflow switcher and a vacuum generator; the adsorption tool has an adsorption station and a release station.

[0015] The air flow switcher can switch between the adsorption station and the release station; the air flow switcher is connected to the positive pressure air source.

[0016] Adsorption station: The airflow from the positive pressure air source is guided to the vacuum generator through the airflow switcher. The vacuum generator generates negative pressure and is connected to the negative pressure adsorption port through the airflow channel;

[0017] Release station: The airflow from the positive pressure air source is guided to the compensating nozzle through the airflow switch and ejected from the compensating nozzle.

[0018] In some embodiments, the air flow switch includes an air inlet, a first air outlet, a second air outlet, a valve core, and a driver.

[0019] The air inlet is connected to a positive pressure air source, the first air outlet is connected to a vacuum generator, and the second air outlet is connected to a compensating nozzle.

[0020] The driver drives the valve core to move to the adsorption position or the release position. The valve core is located at the adsorption position, the air inlet is connected to the first air outlet and the second air outlet is closed. The valve core moves to the release position, the air inlet is connected to the second air outlet and the first air outlet is closed.

[0021] In some embodiments, the air inlet duct is arranged on a suction cup frame, the airflow switch valve body is installed on the suction cup, the valve core is arranged on the valve body, the valve core can slide up and down within a limited distance on the valve body, and the top of the valve core is aligned with the gas outlet of the air inlet duct; a spring is arranged between the valve core and the valve body to support the valve core upward.

[0022] The valve core is provided with an air flow channel, one end of the air flow channel is aligned with the gas outlet of the air inlet, and the other end is the air flow outlet, and the gas outlet is connected to the compensation nozzle.

[0023] A blocking structure is arranged on the valve body; the driver is fixed on the suction cup frame, and a driving rod of the driver is connected to the suction cup and drives the suction cup to move.

[0024] In some embodiments, a sealing piece is provided at the airflow outlet end of the valve core airflow channel, and a through hole is opened on the peripheral surface of the bottom of the airflow channel to form an airflow outlet; the sealing structure includes a sealing ring provided on the valve body, and the sealing ring is provided around the valve core.

[0025] When the valve core moves to the adsorption position, the blocking ring aligns with and blocks the airflow outlet of the valve core. When the valve core moves to the release position, the blocking ring is offset from the airflow outlet, and the gas is ejected from the airflow outlet and flows to the compensation nozzle.

[0026] The compensation nozzle extends downward out of the working surface, and the compensation nozzle is inserted into the through hole of the electrode plate.

[0027] In some embodiments, the adsorption tool further includes a positive pressure ventilation pipe, one end of which is connected to the negative pressure adsorption port, and the other end of which is aligned with the air flow outlet of the valve core air flow channel under the release station.

[0028] In some embodiments, the vacuum generator includes a main flow channel (7a) and a negative pressure flow channel, the inlet section of the main flow channel (7a) is connected to the air outlet of the air flow switch adsorption station, the main flow channel (7a) 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;

[0029] The suction cup has a pressure chamber inside, one end of the negative pressure channel away from the main channel (7a) is connected to the pressure chamber, and the negative pressure adsorption port is in communication with the pressure chamber.

[0030] In some embodiments, a plurality of negative pressure adsorption ports are arranged on the working surface, and the plurality of negative pressure adsorption ports are connected to the same pressure chamber, and a negative pressure maintaining valve is installed in the negative pressure adsorption port.

[0031] The negative pressure maintaining valve includes a stepped hole, a valve cover and an elastic member. The upper hole section of the stepped hole has a small aperture, while the lower hole section has a large aperture. The valve cover has a diameter larger than the upper hole section and smaller than the lower hole section. The valve cover is installed in the lower hole section through the elastic member, and a gap is reserved between the valve cover and the side wall of the lower hole section.

[0032] The external airflow flows into the pressure chamber 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 seal the stepped hole.

[0033] In some embodiments, the adsorption tool further includes an enclosure mounted on the suction cup frame, wherein the enclosure is annular and is disposed around the electrode plate, and a gap is reserved between the enclosure and the edge of the electrode plate.

[0034] The enclosure is installed on the suction cup frame through a lifting drive component, and the lifting drive component drives the enclosure to move up and down.

[0035] At the same time, the present invention also provides a working method using the adsorption tooling provided above, comprising the following steps:

[0036] a. The servo system drives the adsorption tooling to move to the top of the electrode plate to be adsorbed;

[0037] b. The negative pressure adsorption port maintains the negative pressure adsorption state, and at the same time, the servo system drives the adsorption tooling downward until the working surface at the bottom of the suction cup contacts the electrode sheet to be adsorbed;

[0038] c. The negative pressure adsorption port maintains a negative pressure adsorption state, and the adsorption tooling carries the adsorbed electrode plate to move to the top of the release station, and there is a gap between the adsorbed electrode plate and the stacked electrode plates below;

[0039] d. The negative pressure adsorption port cancels the negative pressure, releases the adsorbed electrode plate, and opens the compensation nozzle at the same time;

[0040] The adsorbed electrode plate falls due to gravity, and the gas sprayed from the compensation nozzle enters the gap between the falling electrode plate and the stacked electrode plate below to form a high-pressure area to slow down the falling speed of the electrode plate;

[0041] e. After the falling electrode plate in step d lands on the stacked electrode plate pile, close the compensation nozzle and return to step a.

[0042] Furthermore, step d includes the following specific steps from the adsorption station to the release station:

[0043] d-1. When in the adsorption position, the valve core is supported by the spring and moves to the top dead center of the valve body. There is a gap between the top of the valve core and the air outlet at the bottom of the air inlet, and the gap forms the first air outlet. The gas flows to the vacuum generator through the first air outlet, generates negative pressure, and communicates with the negative pressure adsorption port through the air flow channel.

[0044] The blocking ring is aligned with and blocks the air flow outlet of the valve core, and the compensation nozzle is in a non-working state;

[0045] d-2. The driver drives the suction cup to move upward, and the suction cup, valve body and valve core move upward synchronously, and the top of the valve core is close to the air outlet at the bottom of the air inlet;

[0046] At this time, the gap between the valve core and the air outlet of the air inlet disappears, the first air outlet is closed, the vacuum generator stops working, and the negative pressure at the negative pressure adsorption port is cancelled;

[0047] d-3. The top of the valve core presses against the bottom of the air inlet and no longer moves upward. The driver drives the suction cup and the valve body to continue to move upward. The valve core slides downward relative to the valve body, and the sealing ring and the air flow outlet of the valve core are staggered.

[0048] Part of the gas ejected from the air flow outlet of the valve core is poured into the positive pressure ventilation pipe, and positive pressure appears at the negative pressure adsorption port, thereby pushing the adsorbed electrode plate downward to separate from the working surface of the suction cup and fall down due to gravity;

[0049] Another part of the gas ejected from the air flow outlet of the valve core flows to the compensation nozzle, and the compensation nozzle starts to spray. The gas ejected from the compensation nozzle enters the gap between the falling electrode plate and the stacked electrode plate below to form a high-pressure area to slow down the falling speed of the electrode plate.

[0050] Problem description: The material used for the electrode plate itself has low mechanical strength and is a thin plate, so it is more susceptible to fracture due to stress perpendicular to the plate surface. In traditional technology, when handling and releasing such brittle thin plates (such as wafers and solar panel thin plates), the adsorption tooling will not release the thin plate of the electrode plate very high, and usually release it a few centimeters away from the load surface, which can ensure a higher yield rate.

[0051] The materials used in electrode plates, such as carbon fiber felt and composite materials, have higher mechanical strength than wafers and solar panels. Therefore, releasing the 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 the electrode plates from a height of several centimeters and letting them fall freely, there is a certain probability that the electrode plates will be damaged during actual stacking and handling operations, and the yield rate of electrode plates is even lower than that of solar panels.

[0052] The common solution to the problem of damage to the electrode plate when releasing it is to lower the release height and use a more accurate servo system to release the electrode plate from a height close to or even close to the bottom bearing surface. However, this solution requires a more expensive servo system, which is costly.

[0053] Through our research, we found that there are two main reasons for the damage of the electrode plate:

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The application of the above technical solution of the present invention has the following beneficial effects:

[0060] In view of the above research findings, the present invention proposes an adsorption tooling with a flow channel electrode plate. During the process of releasing the electrode plate, air is blown downward from the through holes of the electrode plate through a compensating nozzle aimed at the electrode plate. On the one hand, this prevents the airflow from escaping from the through holes, and on the other hand, air is replenished from the through holes to the bottom of the electrode plate, thereby artificially creating a high-pressure area under the electrode plate.

[0061] The gas pressure below the electrode plate increases, and the pressure difference 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

[0062] Figure 1 is a schematic diagram of the adsorption tooling of the present invention under the adsorption station;

[0063] Figure 2 It is a schematic diagram of the adsorption tooling of the present invention during the process from the adsorption station to the release station;

[0064] Figure 3 is a schematic diagram of the adsorption tooling of the present invention at the release station;

[0065] Figure 4 yes Figure 1 Schematic diagram of the left half;

[0066] Figure 5 yes Figure 4 The enlarged view of A in the figure is also a schematic diagram of the working method of the adsorption tooling of the present invention in steps a, b, and c;

[0067] Figure 6 yes Figure 2 The enlarged view at B is also a schematic diagram of the working method of the adsorption tooling of the present invention at step d-2;

[0068] Figure 7 yes Figure 3 The enlarged view at C is also a schematic diagram of the working method of the adsorption tooling of the present invention at step d-3;

[0069] Figure 8 yes Figure 4 The enlarged view of point D in the middle;

[0070] Fig. 9 This is a simulation effect diagram of the adsorption station;

[0071] Fig.10 This is a simulation effect diagram of the release station.

[0072] The blue arrows in the attached figure indicate the direction of gas flow.

[0073] Description of Reference Numerals

[0074] 1- Suction cup stand;

[0075] 2-suction cup, 2a-working surface;

[0076] 3-Compensation nozzle;

[0077] 4-Electrode plate;

[0078] 5-Negative pressure adsorption port;

[0079] 6-air flow switch, 6a-valve body, 6b-valve core, 6c-driver, 6d-air inlet, 6e-first air outlet, 6f-second air outlet, 6g-air flow channel;

[0080] 7-vacuum generator, 7a-main channel, 7b-channel contraction portion, 7c-negative pressure channel, 7d-pressure chamber;

[0081] 8- Positive pressure ventilation tube;

[0082] 9-Negative pressure maintaining valve;

[0083] 10-Fence. DETAILED DESCRIPTION

[0084] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0085] In the present invention, unless otherwise stated, the directional words such as "upper" and "lower" usually refer to the orientation in the assembled state. "Inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0086] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0087] The present invention provides an adsorption tool with a flow channel electrode plate 4, comprising a suction cup frame 1 and a suction cup 2. The suction cup frame 1 is connected to a servo system. The suction cup 2 is mounted on the suction cup frame 1. A flat working surface 2a is provided at the bottom of the suction cup 2. The working surface 2a is provided with a plurality of negative pressure adsorption ports 5 for adsorbing the electrode plate 4. At least one compensation nozzle 3 is provided on the working surface 2a, and the compensation nozzle is aligned with the through hole of the electrode plate 4.

[0088] The suction cup frame 1 is a structural frame, which serves as the installation basis of other components. The suction cup frame 1 is connected to a servo system that drives the adsorption tooling to move, and the servo system is not a part of the adsorption tooling.

[0089] The suction cup 2 is mounted on the suction cup frame 1. A negative pressure suction port 5 capable of sucking the electrode plate 4 is provided on the working surface 2a of the suction cup 2. The negative pressure suction port 5 is connected to a negative pressure gas source, and can be directly connected to a vacuum pump, or directly connected to a vacuum generator 7 in the manner provided by the present invention. The vacuum generator 7 will be described in detail later.

[0090] The compensation nozzle 3 is connected to the positive pressure gas source and is controlled to be on and off by a valve. The compensation nozzle 3 is a gas nozzle that can spray gas outward, and the gas flow direction points to the through holes of the electrode plate 4. One or more compensation nozzles 3 can be set. The compensation nozzles 3 are all aimed at the through holes of the electrode plate 4. Preferably, the compensation nozzles 3 correspond to the electrode plates 4 one by one. If there are many through holes on the electrode plate 4, the compensation nozzles 3 are aimed at the larger through holes on the electrode plate 4. The compensation nozzles 3 may not be set for smaller through holes. Preferably, 3-6 compensation nozzles 3 are set, and the compensation nozzles 3 are set around the electrode plate 4 as much as possible. The compensation nozzles 3 can be aimed at the largest 3-6 through holes of the electrode plate 4.

[0091] The effect of the present invention can be seen in the simulation effect. Fig.10 The simulation is a certain simplification and is only a qualitative analysis. The specific quantitative analysis should be determined based on many factors such as the actual size and weight of the electrode plate 4. Fig.10 In the figure, the dark blue part indicates the ambient pressure, which is usually 1 atmosphere. The redder the color, the higher the pressure. The highest pressure occurs at the nozzle of the compensation nozzle 3, and the vias of the stacked electrode plates 4 below also form a high-pressure area. Fig.10 The topmost electrode plate 4 is the electrode plate 4 in the process of falling, and it can be clearly seen that the pressure between the bottom of the falling electrode plate 4 and the bearing surface (the upper surface of the stacked electrode plates 4) is higher than the pressure above the electrode plate 4. An effective pressure difference is formed between the upper and lower surfaces of the falling electrode plate 4, which can slow down the falling speed of the electrode plate 4.

[0092] like Figure 1 As shown in , the adsorption tooling also includes an airflow switcher 6 and a vacuum generator 7. The adsorption tooling has an adsorption position and a release position. The adsorption position is the working state when the adsorption tooling normally adsorbs and carries the electrode plate 4. The release position is the state when the adsorption tooling no longer adsorbs the electrode plate 4.

[0093] The airflow switch 6 can switch between the adsorption station and the release station. The airflow switch 6 is connected to the positive pressure air source. The adsorption tool can switch between the adsorption station and the release station, which is specifically achieved by the airflow switch 6. The vacuum generator 7 can use the incoming airflow as power to generate a negative pressure lower than the ambient pressure.

[0094] By using the cooperation of the air flow switch 6 and the vacuum generator 7, only the positive pressure air source can be connected, and no additional negative pressure air source is needed. Figure 1-Figure 3 ,in, Figure 1 For adsorption station, Figure 3 To release the workstation, Figure 2 This is the switching process between two workstations.

[0095] Adsorption station: The airflow from the positive pressure air source is guided to the vacuum generator 7 via the airflow switch 6, and the vacuum generator 7 generates negative pressure and communicates with the negative pressure adsorption port 5 through the airflow channel 6g.

[0096] Release station: The airflow from the positive pressure air source is guided to the compensation nozzle 3 via the airflow switch 6 and is ejected from the compensation nozzle 3 .

[0097] Airflow Switcher 6:

[0098] like Figure 4 and Figure 5 As shown in FIG. 1 , the air flow switch 6 includes an air inlet 6d, a first air outlet 6e, a second air outlet 6f, a valve core 6b and a driver 6c.

[0099] The air inlet 6d is connected to the positive pressure air source and has an air inlet and an air outlet, wherein the air inlet is connected to the positive pressure air source through a pipeline and the air outlet is aligned with the valve core 6b.

[0100] The first gas outlet 6e is connected to the vacuum generator 7, and the second gas outlet 6f is connected to the compensation nozzle 3. The connection method can be determined according to actual conditions, and it is only necessary to ensure that the gas and gas pressure of the first gas outlet 6e are directed to the vacuum generator 7, and the gas and gas pressure of the second gas outlet 6f are directed to the nozzle.

[0101] The driver 6c drives the valve core 6b to move to the adsorption position or the release position. When the valve core 6b is at the adsorption position, the air inlet 6d is connected to the first air outlet 6e and the second air outlet 6f is closed. When the valve core 6b moves to the release position, the air inlet 6d is connected to the second air outlet 6f and the first air outlet 6e is closed. The driver 6c can be a linear servo driver 6c or an electric push rod, which is directly connected to the valve core 6b to directly drive the valve core 6b to move up and down.

[0102] like Figure 4 As shown in , the driver 6c is fixed on the suction cup frame 1, and the driving rod of the driver 6c is connected to the suction cup 2 and drives the suction cup 2 to move.

[0103] The air inlet 6d is arranged on the suction cup frame 1, the valve body 6a of the airflow switch 6 is installed on the suction cup 2, the valve core 6b is arranged on the valve body 6a, and the valve core 6b can slide up and down within a limited distance on the valve body 6a. Limiting structures can be arranged on the upper and lower parts of the valve core 6b. After the valve core 6b moves to the upper dead point relative to the valve body 6a, the first limiting block blocks the valve core 6b to prevent the valve core 6b from continuing to move upward. Similarly, after the valve core 6b moves to the lower dead point relative to the valve body 6a, the second limiting block blocks the valve core 6b to prevent the valve core 6b from continuing to move downward.

[0104] First air outlet 6e: The top of the valve core 6b is aligned with the gas outlet of the air inlet 6d. The top of the valve core 6b is provided with a plugging head made of a flexible material. When the valve core 6b is located at the lower dead center (adsorption position) of the valve body 6a, the top of the valve core 6b is separated from the air outlet of the air inlet 6d, and the gap between the valve core 6b and the air inlet 6d forms the first air outlet 6e. When the valve core 6b is located at the upper dead center (release position) of the valve body 6a, the plugging head at the top of the valve core 6b presses against the air outlet at the bottom of the air inlet 6d, and the first air outlet 6e is closed.

[0105] Second air outlet 6f: The valve core 6b is provided with an air flow channel 6g. One end of the air flow channel 6g is aligned with the gas outlet of the air inlet 6d, and the other end is the air flow outlet. The gas outlet is connected to the compensation nozzle 3. The air flow channel 6g and the air flow outlet on the valve core 6b are the second air outlet 6f. At the same time, a blocking structure is provided on the valve body 6a. When the valve core 6b is located at the upper dead center position (adsorption position) of the valve body 6a, the blocking structure abuts against the air flow outlet of the valve core 6b, thereby closing the second air outlet 6f. When the valve core 6b is located at the lower dead center position (release position) of the valve body 6a, the blocking structure is offset from the air flow outlet, and the gas in the air flow channel 6g of the valve core 6b flows to the compensation nozzle 3 via the air flow outlet.

[0106] In the present invention, the driver 6c does not directly drive the valve core 6b, but indirectly drives the valve body 6a to move up and down by driving the suction cup 2. Therefore, a spring needs to be arranged between the valve core 6b and the valve body 6a to support the valve core 6b upward. When the top of the valve core 6b is not subjected to force, the spring keeps the valve core 6b at the top dead center of the valve body 6a, thereby preventing the valve core 6b from sliding down and opening the air flow outlet of the valve core 6b.

[0107] Blocking structure: A blocking piece is provided at the airflow outlet end of the airflow channel 6g of the valve core 6b. A through hole is provided on the peripheral surface of the bottom of the airflow channel 6g to form an airflow outlet. The blocking structure includes a blocking ring provided on the valve body 6a. The blocking ring is provided around the valve core 6b.

[0108] When the valve core 6b moves to the adsorption position, the blocking ring aligns with and blocks the airflow outlet of the valve core 6b; when the valve core 6b moves to the release position, the blocking ring is offset from the airflow outlet, and the gas is ejected from the airflow outlet and flows to the compensation nozzle 3.

[0109] like Fig.10 As shown in the simulation result diagram, the compensation nozzle 3 extends downward from the working surface 2a. The compensation nozzle 3 is inserted into the through hole of the electrode plate 4. On the one hand, the compensation nozzle 3 can position the electrode plate 4, and on the other hand, it can enhance the effect of compensating the pressure on the lower surface of the electrode plate 4. The distance that the compensation nozzle 3 extends out of the working surface 2a is not greater than the thickness of the electrode plate 4.

[0110] Positive pressure ventilation pipe 8: The electrode plate 4 is tightly attached to the working surface 2a of the suction cup 2. Due to the van der Waals force or electrostatic adsorption, the electrode plate 4 will have a certain degree of adsorption and adhesion on the suction cup 2, which will cause the electrode plate 4 not to fall after the negative pressure of the negative pressure adsorption port 5 disappears. Therefore, the adsorption tooling also includes a positive pressure ventilation pipe 8, one end of the positive pressure ventilation pipe 8 is connected to the negative pressure adsorption port 5, and the other end is aligned with the airflow outlet 6g of the airflow channel 6b of the valve core 6b under the release position. At the release position, the gas is ejected from the airflow outlet of the valve core 6b, and part of the airflow is guided into the negative pressure adsorption port 5 through the positive pressure ventilation pipe 8, so that the negative pressure adsorption port 5 is in a positive pressure state, which in turn overcomes the adhesion and adsorption of the electrode plate 4 to the working surface 2a of the suction cup 2, and pushes the electrode plate 4 away from the working surface 2a. See. Fig.10 In the present invention, the positive pressure ventilation tube 8 is directly connected to the pressure chamber 7d. It can be clearly seen that the pressure in the pressure chamber 7d is higher than 1 atmosphere.

[0111] Vacuum generator 7:

[0112] like Figure 8 As shown in , the vacuum generator 7 includes a main flow channel 7a and a negative pressure flow channel 7c. The inlet section of the main flow channel 7a is connected to the air outlet of the adsorption station of the air flow switch 6, the main flow channel 7a has a flow channel contraction portion 7b, and a side hole is provided on the side wall of the flow channel contraction portion 7b. One end of the negative pressure flow channel 7c is connected to the side hole, and the other end is connected to the negative pressure adsorption port 5.

[0113] In the present invention, the main channel 7a is formed between the lower surface of the suction cup frame 1 and the upper surface of the suction cup 2. The left and right sides of the main channel 7a can be constrained by elastic materials such as organ rubber strips. The suction cup 2 has a pressure chamber 7d, and the end of the negative pressure channel 7c away from the main channel 7a is connected to the pressure chamber 7d, and the negative pressure adsorption port 5 is connected to the pressure chamber 7d.

[0114] Fig. 9 The red part in the middle represents the ambient pressure (one atmosphere), and the bluer the color, the lower the pressure. When the gas passes through the flow channel contraction part 7b, the pressure drops significantly, and the pressure in the pressure chamber 7d leaks from the negative pressure flow channel 7c, so that the entire pressure chamber 7d maintains a negative pressure state. The pressure chamber 7d is directly connected to the negative pressure adsorption port 5, and the negative pressure adsorption port 5 is kept in an adsorption state.

[0115] The flow channel contraction portion 7b is formed as follows Figure 3 As shown, a flexible rubber block is provided at the top of the main channel 7a (the lower surface of the suction cup frame 1) or the bottom of the main channel 7a (the upper surface of the suction cup 2) to form a flow channel contraction portion 7b. The side hole is directly opened on the rubber block or aligned with the rubber block. When the station is released, after the suction cup 2 moves upward, the side hole will support the flow channel contraction portion 7b, thereby blocking the side hole and preventing the positive pressure injected into the pressure chamber 7d by the positive pressure vent pipe 8 from escaping from the side buckle through the negative pressure vent pipe.

[0116] A plurality of negative pressure adsorption ports 5 are provided on the working surface 2a, and a plurality of negative pressure adsorption ports 5 are connected to the same pressure chamber 7d, and a negative pressure maintaining valve 9 is installed in the negative pressure adsorption port 5. Figure 8 As shown in , the negative pressure maintaining valve 9 includes 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 valve cover has a diameter larger than the upper hole section and smaller than the lower hole section. The valve cover is installed in the lower hole section through the 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 7d 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.

[0117] like Figure 1 and Fig.10 As shown in the figure, the adsorption tooling also includes a fence 10 installed on the suction cup frame 1. The fence 10 is annular and is arranged around the electrode plate 4, and a gap is reserved between the fence 10 and the edge of the electrode plate 4. The fence 10 is located at the outer periphery of the falling electrode plate 4 and the bearing surface (the upper surface of the electrode plates 4 stacked below), which can further slow down the escape of gas from between the electrode plate 4 and the bearing surface and increase the pressure between the electrode plate 4 and the bearing surface.

[0118] Preferably, in order to avoid interference of the enclosure 10 when grabbing the electrode plate 4, the enclosure 10 is installed on the suction cup frame 1 through a lifting drive assembly, and the lifting drive assembly drives the enclosure 10 to move up and down.

[0119] The present invention also provides a working method using the above-mentioned adsorption tooling, comprising the following steps:

[0120] a. The servo system drives the adsorption tool to move to the top of the electrode plate 4 to be adsorbed;

[0121] b. The negative pressure adsorption port 5 maintains the negative pressure adsorption state, and at the same time, the servo system drives the adsorption tooling downward until the working surface 2a at the bottom of the suction cup 2 contacts the electrode sheet 4 to be adsorbed;

[0122] c. The negative pressure adsorption port 5 maintains a negative pressure adsorption state, and the adsorption tool carries the adsorbed electrode plate 4 to move to the top of the release station, and there is a gap between the adsorbed electrode plate 4 and the stacked electrode plates 4 below;

[0123] d. The negative pressure adsorption port 5 cancels the negative pressure, releases the adsorbed electrode plate 4, and opens the compensation nozzle 3 at the same time;

[0124] The adsorbed electrode plate 4 falls due to gravity, and the gas sprayed by the compensation nozzle 3 enters the gap between the falling electrode plate 4 and the stacked electrode plate 4 below to form a high-pressure area to slow down the falling speed of the electrode plate 4;

[0125] e. After the falling electrode plate 4 falls on the stacked electrode plates 4 in step d, close the compensating nozzle 3 and return to step a.

[0126] Specifically, step d from the adsorption station to the release station includes the following specific steps:

[0127] d-1, when adsorbing the station, if Figure 5 As shown, the valve core 6b is supported by the spring and moves to the top dead center of the valve body 6a. There is a gap between the top of the valve core 6b and the outlet at the bottom of the air inlet 6d, and the gap forms a first outlet 6e. The gas flows to the vacuum generator 7 through the first outlet 6e, generates negative pressure, and communicates with the negative pressure adsorption port 5 through the air flow channel 6g.

[0128] The blocking ring is aligned with and blocks the air flow outlet of the valve core 6b, and the compensation nozzle 3 is in a non-working state;

[0129] d-2, such as Figure 6 As shown, the driver 6c drives the suction cup 2 to move upward, and the suction cup 2, together with the valve body 6a and the valve core 6b, moves upward synchronously, and the top of the valve core 6b is close to the air outlet at the bottom of the air inlet 6d;

[0130] At this time, the gap between the valve core 6b and the air outlet of the air inlet 6d disappears, the first air outlet 6e is closed, the vacuum generator 7 stops working, and the negative pressure adsorption port 5 cancels the negative pressure;

[0131] At this time, the valve core 6b is still located at the top dead center of the valve body 6a.

[0132] d-3, such as Figure 7 As shown, the top of the valve core 6b presses against the bottom of the air inlet 6d and stops moving upward, the driver 6c drives the suction cup 2 and the valve body 6a to continue to move upward, the valve core 6b slides downward relative to the valve body 6a, and the sealing ring is staggered with the air flow outlet of the valve core 6b;

[0133] A part of the gas ejected from the air flow outlet of the valve core 6b is poured into the positive pressure ventilation pipe 8, and a positive pressure appears in the negative pressure adsorption port 5, thereby pushing the adsorbed electrode plate 4 downward to separate from the working surface 2a of the suction cup 2 and falling due to gravity;

[0134] Another part of the gas ejected from the air flow outlet of the valve core 6b flows to the compensation nozzle 3, and the compensation nozzle 3 starts to spray. The gas ejected from the compensation nozzle 3 enters the gap between the falling electrode plate 4 and the stacked electrode plate 4 below to form a high-pressure area to slow down the falling speed of the electrode plate 4.

[0135] 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. An adsorption tool with a flow channel electrode plate, characterized in that: include: A suction cup frame (1), wherein the suction cup frame (1) is connected to a servo system, and a suction cup (2) is mounted on the suction cup frame (1); A suction cup (2), wherein a flat working surface (2a) is provided at the bottom of the suction cup (2), and the working surface (2a) is provided with a plurality of negative pressure adsorption ports (5) for adsorbing the electrode plate (4); At least one compensation nozzle (3) is arranged on the working surface (2a), and the compensation nozzle is aligned with the through hole of the electrode plate (4).

2. The adsorption tooling with flow channel electrode plate according to claim 1, characterized in that: The adsorption tool further comprises an airflow switcher (6) and a vacuum generator (7); the adsorption tool comprises an adsorption station and a release station; The air flow switch (6) is capable of switching between the adsorption position and the release position; the air flow switch (6) is connected to a positive pressure air source; Adsorption station: the airflow from the positive pressure air source is directed to the vacuum generator (7) via the airflow switch (6); the vacuum generator (7) generates negative pressure and is connected to the negative pressure adsorption port (5) via the airflow channel (6g); Release station: The airflow from the positive pressure air source is guided to the compensation nozzle (3) via the airflow switch (6) and is ejected from the compensation nozzle (3).

3. The adsorption tooling with flow channel electrode plate according to claim 2, characterized in that: The air flow switch (6) comprises an air inlet (6d), a first air outlet (6e), a second air outlet (6f), a valve core (6b) and a driver (6c); The air inlet (6d) is connected to a positive pressure air source, the first air outlet (6e) is connected to a vacuum generator (7), and the second air outlet (6f) is connected to a compensating nozzle (3); The driver (6c) drives the valve core (6b) to move to an adsorption position or a release position. When the valve core (6b) is located at the adsorption position, the air inlet (6d) is connected to the first air outlet (6e) and the second air outlet (6f) is closed. When the valve core (6b) moves to the release position, the air inlet (6d) is connected to the second air outlet (6f) and the first air outlet (6e) is closed.

4. The adsorption tooling with flow channel electrode plate according to claim 3, characterized in that: The air inlet (6d) is arranged on the suction cup frame (1), the valve body (6a) of the air flow switch (6) is installed on the suction cup (2), the valve core (6b) is arranged on the valve body (6a), the valve core (6b) can slide up and down within a limited distance on the valve body (6a), and the top of the valve core (6b) is aligned with the gas outlet of the air inlet (6d); a spring is arranged between the valve core (6b) and the valve body (6a) to support the valve core (6b) upward; The valve core (6b) is provided with an air flow channel (6g), one end of the air flow channel (6g) is aligned with the gas outlet of the air inlet (6d), and the other end is the air flow outlet, and the gas outlet is connected to the compensation nozzle (3); A blocking structure is provided on the valve body (6a); The driver (6c) is fixed on the suction cup frame (1), and a driving rod of the driver (6c) is connected to the suction cup (2) and drives the suction cup (2) to move.

5. The adsorption tooling with flow channel electrode plate according to claim 4, characterized in that: A blocking piece is provided at the air flow outlet end of the air flow channel (6g) of the valve core (6b), and a through hole is provided on the peripheral surface of the bottom of the air flow channel (6g) to form an air flow outlet; The blocking structure comprises a blocking ring arranged on the valve body (6a), the blocking ring being arranged around the valve core (6b); When the valve core (6b) moves to the adsorption position, the blocking ring is aligned with and blocks the air flow outlet of the valve core (6b); when the valve core (6b) moves to the release position, the blocking ring is offset from the air flow outlet, and the gas is ejected from the air flow outlet and then flows to the compensation nozzle (3); The compensation nozzle (3) extends downward from the working surface (2a), and the compensation nozzle (3) is inserted into the through hole of the electrode plate (4).

6. The adsorption tooling with flow channel electrode plate according to claim 5, characterized in that: The adsorption tooling also includes a positive pressure ventilation pipe (8), one end of which is connected to the negative pressure adsorption port (5), and the other end of which is aligned with the air flow outlet of the air flow channel (6g) of the valve core (6b) under the release position.

7. The adsorption tooling with flow channel electrode plate according to claim 2, characterized in that: The vacuum generator (7) comprises a main flow channel (7a) and a negative pressure flow channel (7c); the inlet section of the main flow channel (7a) is connected to the air outlet of the adsorption station of the air flow switch (6); the main flow channel (7a) has a flow channel contraction portion (7b); a side hole is provided on the side wall of the flow channel contraction portion (7b); one end of the negative pressure flow channel (7c) is connected to the side hole, and the other end is communicated with the negative pressure adsorption port (5); The suction cup (2) has a pressure chamber (7d) therein, one end of the negative pressure channel (7c) away from the main channel (7a) is connected to the pressure chamber (7d), and the negative pressure adsorption port (5) is in communication with the pressure chamber (7d).

8. The adsorption tooling with flow channel electrode plate according to claim 7, characterized in that: A plurality of negative pressure adsorption ports (5) are arranged on the working surface (2a), and the plurality of negative pressure adsorption ports (5) are connected to the same pressure chamber (7d). A negative pressure maintaining valve (9) is installed in the negative pressure adsorption port (5). The negative pressure maintaining valve (9) comprises a stepped hole, a valve cover and an elastic member, wherein 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 the elastic member, and a gap is reserved between the valve cover and the side wall of the lower hole section; The external air flows to the pressure chamber (7d) through the pressure maintaining valve. Inside, the valve cover overcomes the elastic force of the elastic member and clings to the hole shoulder of the step hole to seal the step hole.

9. The adsorption tooling with flow channel electrode plate according to claim 1, characterized in that: The adsorption tooling further comprises a baffle (10) mounted on the suction cup frame (1), wherein the baffle (10) is annular and is arranged around the electrode plate (4), and a gap is reserved between the baffle (10) and the edge of the electrode plate (4); The enclosure (10) is installed on the suction cup frame (1) via a lifting drive assembly, and the lifting drive assembly drives the enclosure (10) to move up and down.

10. A working method using the adsorption tooling according to any one of claims 1 to 9, characterized in that: The following steps are involved: a. The servo system drives the adsorption tool to move to the top of the electrode plate (4) to be adsorbed; b. The negative pressure adsorption port (5) maintains a negative pressure adsorption state, and at the same time, the servo system drives the adsorption tooling to move downward to the bottom working surface (2a) of the suction cup (2) to contact the electrode sheet (4) to be adsorbed; c. The negative pressure adsorption port (5) maintains a negative pressure adsorption state, and the adsorption tool carries the adsorbed electrode plate (4) and moves to the top of the release station, with a gap between the adsorbed electrode plate (4) and the stacked electrode plates (4) below; d. The negative pressure adsorption port (5) cancels the negative pressure, releases the adsorbed electrode plate (4), and simultaneously opens the compensation nozzle (3); The adsorbed electrode plate (4) falls due to gravity, and the gas sprayed by the compensation nozzle (3) enters the gap between the falling electrode plate (4) and the stacked electrode plates (4) below to form a high-pressure area, thereby slowing down the falling speed of the electrode plate (4); e. After the falling electrode plate (4) in step d falls on the stacked electrode plates (4), the compensating nozzle (3) is closed and the process returns to step a; When the adsorption tooling provided in claim 6 is used, step d from the adsorption station to the release station includes the following specific steps: d-1, when in the adsorption position, the valve core (6b) is supported by the spring and moves to the upper dead center of the valve body (6a), and a gap is formed between the top of the valve core (6b) and the air outlet at the bottom of the air inlet (6d), and the gap forms a first air outlet (6e); the gas flows to the vacuum generator (7) through the first air outlet (6e), generates negative pressure and communicates with the negative pressure adsorption port (5) through the air flow channel (6g); The blocking ring is aligned with and blocks the air flow outlet of the valve core (6b), and the compensation nozzle (3) is in a non-working state; d-2. The driver (6c) drives the suction cup (2) to move upward, and the suction cup (2) together with the valve body (6a) and the valve core (6b) move upward synchronously, and the top of the valve core (6b) is close to the air outlet at the bottom of the air inlet (6d); At this time, the gap between the valve core (6b) and the air outlet of the air inlet (6d) disappears, the first air outlet (6e) is closed, the vacuum generator (7) stops working, and the negative pressure at the negative pressure adsorption port (5) is cancelled; d-3, the top of the valve core (6b) presses against the bottom of the air inlet (6d) and stops moving upward, the driver (6c) drives the suction cup (2) and the valve body (6a) to continue moving upward, the valve core (6b) slides downward relative to the valve body (6a), and the sealing ring and the air flow outlet of the valve core (6b) are staggered; A portion of the gas ejected from the air flow outlet of the valve core (6b) is poured into the positive pressure ventilation pipe (8), and a positive pressure is generated at the negative pressure adsorption port (5), thereby pushing the adsorbed electrode plate (4) downward to separate from the working surface (2a) of the suction cup (2), and causing it to fall due to gravity; Another part of the gas ejected from the air flow outlet of the valve core (6b) flows to the compensating nozzle (3), and the compensating nozzle (3) starts to eject gas. The gas ejected from the compensating nozzle (3) enters the gap between the falling electrode plate (4) and the stacked electrode plate (4) below to form a high-pressure area, thereby slowing down the falling speed of the electrode plate (4).

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