Liquid flow battery electrode assembly production line

Abstract

The present invention relates to the field of liquid flow battery production equipment, and specifically to a battery electrode assembly production line. It includes: a material conveying system, which is used to convey materials to each processing station; an electrode frame substrate feeding system, which feeds the electrode frame substrate to the material conveying system; an electrode frame cover plate feeding system, which feeds the electrode frame cover plate to the material conveying system; an electrode frame welding system, which welds and fixes the electrode frame substrate and the electrode frame cover plate delivered by the material conveying system into an electrode frame; an electrode sheet feeding system, which feeds the electrode sheet onto the electrode frame on the material conveying system; the electrode sheet feeding system includes a feeding system for supplying electrode sheet materials, and a mounting system for mounting the electrode sheet from the feeding system onto the electrode frame; an electrode sheet fixing system, which fixes the electrode sheet and the electrode frame into an electrode assembly. Through the above technical scheme, the electrode assembly can be directly produced, and the assembly production progress of the liquid flow battery can be accelerated.

Description

Technical Field

[0001] The invention relates to the field of liquid flow battery production equipment, and in particular to a battery electrode assembly production line. Background Art

[0002] Liquid flow batteries are usually composed of a positive electrode frame, a positive electrode, an ion conduction membrane, a negative electrode, a negative electrode frame, and auxiliary components such as a shell, a pipeline, and a fixing. Each single cell is connected together through a bipolar plate and connected in series in the circuit.

[0003] In order for the positive and negative electrodes of the flow battery to generate potential normally, it is necessary to continuously supply electrolyte to the positive and negative electrodes. An electrode frame is generally provided outside the electrode sheet, which is used to fix the electrode sheet on the one hand, and on the other hand, the electrode frame has an electrolyte flow channel to supply electrolyte to the electrode sheet. The electrode frame needs to form a flow channel inside to supply electrolyte to the electrode sheet. For example, the electrode frame structure provided in the Chinese invention patent with publication number CN107845823B.

[0004] During the final assembly of the flow battery, the electrode sheet and the electrode frame are combined into an electrode assembly and installed in the battery shell. The electrode frame and the shell are fixed, and the electrode sheet is fixed to the electrode frame. However, due to the different materials of the electrode frame and the electrode plate, the physical properties vary greatly. For example, the carbon electrode plate material has a large contact area with the electrolyte and sufficient catalysis, but poor mechanical properties, generally showing high brittleness. The toughness and mechanical strength of the electrode frame are generally much greater than that of the electrode plate.

[0005] It is because of the different mechanical properties of the electrode sheet and the electrode frame that it is not convenient to arrange the production line. Therefore, during the production and manufacturing, they are generally carried out separately. The electrode frame is produced first, and then the electrode plate and the electrode frame are installed in place during the assembly stage of the flow battery. However, this method of producing the electrode frame and the electrode plate separately and assembling them in the final stage is not conducive to the assembly work and is prone to damage to the electrode plate. Summary of the invention

[0006] The present invention changes the original production method of independently producing the electrode frame and then combining the electrode frame and the electrode sheet in the final assembly stage. It provides a device that arranges the production of the electrode frame and the installation of the electrode frame and the electrode sheet on a unified production line to directly produce the electrode assembly. It simplifies the complexity of the production step arrangement and the difficulty of the final flow battery assembly, and speeds up the production process.

[0007] In order to achieve the above object, the present invention provides a flow battery electrode assembly production line, comprising:

[0008] The material conveying system is used to convey materials to each processing station.

[0009] The electrode frame substrate loading system loads the electrode frame substrate to the material conveying system.

[0010] The electrode frame cover feeding system feeds the electrode frame cover to the material conveying system.

[0011] The electrode frame welding system welds and fixes the electrode frame substrate and the electrode frame cover plate delivered by the material conveying system into an electrode frame.

[0012] The electrode sheet feeding system feeds the electrode sheets onto the electrode frame on the material conveying system; the electrode sheet feeding system comprises a feeding system for supplying the electrode sheet material, and a mounting system for mounting the electrode sheets from the feeding system onto the electrode frame.

[0013] The electrode sheet fixing system fixes the electrode sheet and the electrode frame to form an electrode assembly.

[0014] The unloading system unloads the electrode assembly.

[0015] In some embodiments, the feeding system includes an electrode sheet feeding cart for carrying vertically stacked electrode sheets, a parking station for the electrode sheet feeding cart on the production line, a lift on the parking station for moving the stacked electrode sheets upward as a whole, and an electrode sheet positioning system for moving the top electrode sheet to the loading position.

[0016] In some embodiments, the electrode sheet feeding vehicle includes an AVG chassis, a frame body detachably mounted on the AVG chassis, and a tray for holding the electrode sheets.

[0017] The tray is arranged on a frame, and a plurality of vertical tracks are arranged on the frame, and the tray can slide up and down along the frame; a plurality of electrode sheets are stacked on the tray; the stacked electrode sheets are stuck between the frame and the tracks, and move up and down in translation under the constraints of the frame and the tracks.

[0018] In some embodiments, a plurality of lifting cylinders are arranged around the bottom of the parking station of the production line, and the lifting cylinders are connected to hooks; the frame is provided with a slot structure that cooperates with the hooks, and after the electrode sheet feeding vehicle is in place at the parking station, the lifting cylinder moves upward, and the hooks and slots cooperate to fix the frame, and at the same time lift the frame upward, so that the frame is separated from the AVG chassis, and then the AVG chassis can leave the parking station.

[0019] In some embodiments, there are elevators on the left and right sides of the parking station, and the lifting part of the elevator and the pallet are provided with mutually cooperating locking structures. After the electrode sheet feeding vehicle is in place at the parking station, the lifting part of the elevator and the pallet are mutually locked to drive the pallet and the electrode sheet on the pallet to move up and down.

[0020] In some embodiments, a sensor for identifying the height of the electrode plate is fixedly installed on the top of the parking station. After the installation system takes away the top electrode sheet, the elevator drives the tray and the electrode sheet on the tray to move upward. When the top electrode sheet reaches the designed height, the sensor triggers the elevator to stop moving.

[0021] In some embodiments, the electrode sheet positioning system also includes a pushing assembly, which can extend horizontally in a pushing state, and push the electrode sheet located at the top, and move the top electrode sheet horizontally to a material picking position of the installation system. At the same time, after the pushing assembly is horizontally extended, the pushing part is pressed directly above the remaining electrode sheets stacked except the top electrode sheet, so as to avoid adhesion of the lower electrode sheets when the installation system grabs the top electrode sheet.

[0022] In some embodiments, the pushing assembly is disposed on one side of the top of the electrode sheet, and its vertical projection does not overlap with the electrode sheet when the pushing assembly is in a retracted state.

[0023] Two groups of pushing components are cross-arranged, and the two groups of pushing components push two adjacent sides of the electrode sheet respectively.

[0024] The push assembly comprises a horizontal cylinder, a push plate is installed on the horizontal cylinder, and a push surface of the push plate is covered with a flexible buffer pad.

[0025] In some embodiments, the electrode sheet positioning system further includes two sets of positioning baffles whose two adjacent sides of the electrode sheet are flush with each other, and a gap is reserved between the positioning baffles and the electrode sheet.

[0026] The positioning baffles correspond to the pushing assemblies one by one, and the positioning baffles are respectively perpendicular to the pushing directions of the pushing assemblies corresponding to them.

[0027] In some embodiments, the installation system includes a servo drive assembly and a tooling fixture installed on the servo drive assembly. The tooling fixture is equipped with a number of suction cups that continuously generate negative pressure. After the suction cups absorb the electrode sheet, they first translate upward and then install the electrode sheet on the electrode frame. The electrode frame is made by an electrode frame welding system and is transferred to the electrode sheet fixing station by a material conveying system.

[0028] The application of the above technical solution of the present invention to a liquid flow battery electrode assembly production line has the following effects:

[0029] The present invention changes the original motor production method to manufacture the electrode frame on the same production line and then combine the electrode sheet with the electrode frame to form an electrode assembly. In the final assembly stage of the flow battery, the electrode assembly is directly installed in place, which simplifies the assembly difficulty of the flow battery and speeds up the production rhythm.

[0030] In addition, the mechanical strength of electrode sheets, especially those made of carbon-based materials, is far inferior to that of metal materials, and their toughness is also lower than that of plastic materials. Therefore, it is easy to damage the electrode sheets during the final assembly production stage, and the damaged electrode sheets can only be scrapped. If they are installed in a current battery, leakage is likely to occur, which will cause a low yield rate in the final assembly of the entire liquid flow battery. By directly producing the electrode assembly through the solution of this application, the loss rate of the electrode sheets during the final assembly process is reduced.

[0031] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a production line layout diagram of an embodiment of the present invention;

[0033] Figure 2 The present invention Figure 1 Stereoscopic image of

[0034] Figure 3 It is a schematic diagram of the electrode sheet feeding process (the AVG chassis is not drawn);

[0035] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0036] Description of Reference Numerals

[0037] 1-Material conveying system;

[0038] 2-Electrode frame substrate feeding system;

[0039] 3-Electrode frame cover feeding system;

[0040] 4-Electrode frame welding system;

[0041] 5-Electrode sheet feeding system;

[0042] 51-feeding system, 511 electrode sheet feeding car, 512 lift, 513-electrode sheet positioning system; 5131-horizontal cylinder, 5132 baffle; 514-lifting cylinder;

[0043] 52-Install the system;

[0044] 6-Electrode fixing system;

[0045] 7-Feeding system;

[0046] 8-Parking station. DETAILED DESCRIPTION

[0047] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0048] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inside", "outside", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0049] In the embodiments of the present application, "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0050] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] In the present invention, a production line for a liquid flow battery electrode assembly is provided. Figure 1 As shown, the flow battery electrode assembly production line includes:

[0052] The material conveying system 1 is used to convey materials to various processing stations. Raw materials and semi-finished materials are conveyed to various processing positions along a preset track on the production line. The material conveying system 1 includes a preset track and a feeding device moving on the track. Various materials are fixed on the feeding device and move along the track to the program-set position.

[0053] The electrode frame substrate loading system 2 loads the electrode frame substrate to the material conveying system 1 .

[0054] The electrode frame cover plate feeding system 3 feeds the electrode frame cover plate to the material conveying system 1. The function of the electrode frame is to fix and protect the electrode sheet, so the structural strength and mechanical properties of the electrode frame itself are relatively good, and considering that the electrode frame works in an electrolyte environment, it is highly corrosive and needs to have relatively good insulation. Preferably, the electrode frame substrate and the electrode frame cover plate are generally made of plastic. The feeding and positioning of plastic parts are very mature in the prior art, and this application will not go into details.

[0055] The electrode frame welding system 4 welds the electrode frame substrate and the electrode frame cover delivered by the material conveying system 1 to form an electrode frame. As mentioned above, the electrode frame itself is generally made of plastic. During welding, ultrasonic welding or laser welding is generally used. After the electrode frame substrate and the electrode frame cover are fixed, a flow channel for the electrolyte will be formed inside the electrode frame.

[0056] The electrode sheet feeding system 5 feeds the electrode sheet onto the electrode frame on the material conveying system 1. The electrode sheet feeding system 5 includes a feeding system 51 for supplying electrode sheet materials, and a mounting system 52 for mounting the electrode sheet from the feeding system 51 onto the electrode frame. The electrode sheet of the flow battery is very thin, only a few millimeters, and is generally made of carbon-based composite materials in the form of a carbon plate. Therefore, the entire feeding system includes two parts, one part is the feeding system 51 part, and the other part is the mounting system 52 part. The feeding system 51 supplies the electrode sheet to a fixed position, which is then grabbed by the mounting system 52 and mounted on the electrode frame.

[0057] The electrode sheet fixing system 6 fixes the electrode sheet to the electrode frame to form an electrode assembly. There may be multiple ways to fix the electrode sheet and the electrode frame depending on the overall design of the flow battery. The simplest way is to directly bond the electrode sheet to the electrode frame with a specific glue. In more cases, a frame cover is set at the edge of the electrode sheet, and the frame cover fixes the electrode sheet to the electrode frame. The material of the frame cover is consistent with that of the electrode frame, and the frame cover can be fixed to the electrode frame by an ultrasonic or laser welding system.

[0058] The unloading system 7 unloads the electrode assembly. The unloading system 7 unloads, stacks and fixes the finished electrode assembly. When unloading, the electrode frame part of the electrode assembly is grasped and fixed by a fixture to unload.

[0059] Due to the poor mechanical properties of the electrode sheet and its relatively thin characteristics, the present application focuses on the design of the electrode sheet feeding system 5 to achieve the purpose of integrating the electrode sheet fixation on the electrode frame production line and ultimately directly producing the electrode assembly. The following is a distribution introduction.

[0060] like Figure 2 and Figure 3As shown in , the feeding system 51 includes an electrode sheet feeding cart 511 for carrying vertically stacked electrode sheets. There is a parking station 8 for the electrode sheet feeding cart 511 on the production line. The parking station 8 here is a virtual concept proposed for the convenience of describing this application. In fact, it is the station where the electrode sheet feeding cart 511 is parked and fed when the entire production line is working. The parking station 8 is equipped with an elevator 512 for moving the stacked electrode sheets upward as a whole. The elevator 512 here is a set of lifting servo systems that can accurately control the lifting height of the electrode sheets according to instructions. Whenever the installation system 52 takes away the top electrode sheet, the control system controls the elevator 512 to lift the stacked electrode sheet upward by a distance of the thickness of the electrode sheet to ensure that the height of the top electrode sheet in each feeding cycle is always consistent. This can be achieved through a program or through interrupt feedback from a sensor, which will be described in detail later.

[0061] The feeding system 51 also includes an electrode sheet positioning system 513 for translating the topmost electrode sheet to the loading position. The electrode sheet feeding system 51 has the following two main functions:

[0062] 1. After the electrode sheets are produced, they will be stacked together. When the feeding system 51 of the production line of this application is loaded, the electrode sheets will produce adsorption due to long-term contact. When taking away the top electrode sheet, it is easy to take away the electrode sheet below. And because the electrode sheet itself is thin, it is easy to generate negative pressure between the upper electrode sheet and the lower electrode sheet after the upper electrode sheet is taken away by the installation system 52, and the lower electrode sheet is also taken away. However, this adsorption effect and negative pressure are very unstable, and the top electrode sheet will fall when it is taken away by the installation system 52. It is very easy to cause damage to the electrode sheet, for example, the appearance of the flow channel is damaged due to collision or it falls and breaks directly. If the breakage occurs directly, the production line can be manually shut down to remove the broken electrode sheet, or the production safety monitoring system can identify and remove the broken electrode sheet. If only cracks are generated or the flow channel is damaged, it will cause the entire flow battery to be scrapped after being installed in the flow battery, and the loss will be more serious. Therefore, the electrode sheet positioning system 513 is set to horizontally translate the top electrode sheet for a certain distance each time, which greatly reduces the adsorption effect between the top electrode sheet and the bottom electrode sheet. Staggering the top electrode sheet and the bottom electrode sheet during horizontal movement also facilitates the air flow rate to reduce negative pressure, and air will enter the gap between the top electrode sheet and the bottom electrode sheet during the horizontal movement.

[0063] 2. The installation position accuracy of the electrode sheet on the electrode frame is very high, so that the flow channel of the electrode frame can be aligned with the electrode sheet, ensuring that the electrolyte flows through the electrode sheet as designed. However, the parking accuracy of the electrode sheet feeding vehicle 511 of the feeding system 51 is lower than the installation accuracy of the electrode sheet. Using the electrode sheet positioning system 513 to push the top electrode sheet to a fixed position can greatly improve the positioning accuracy of the electrode sheet.

[0064] Electrode sheet feeding car and lift introduction

[0065] Specifically, the electrode sheet feeding vehicle 511 includes an AVG chassis, a frame body and a tray for holding electrode sheets that can be detachably mounted on the AVG chassis. The AVG chassis is controlled by a program to carry materials into the parking station 8 for loading operations. After the electrode sheet loading is completed, it will also be responsible for transporting the frame body out of the parking station 8 to make room. The tray is arranged on the frame body, and a plurality of vertical tracks are arranged on the frame body, and the tray can slide up and down along the frame body. Several electrode sheets are stacked on the tray. The stacked electrode sheets are stuck between the frame body and the track, and move up and down translationally under the constraints of the frame body and the track. In the present application, the frame body, on the one hand, constrains the stacked electrode sheet material pile to prevent the stacked electrode sheets from tipping over due to vibration. On the other hand, it is also the lifting track of the tray. Since a separate electrode sheet positioning system 513 is provided in the present application, the position accuracy of the stacked electrode sheets can be relaxed. Using the frame body as a track is sufficient to meet the accuracy requirements. Moreover, the frame is used as a track, and the process of the entire electrode sheet feeding vehicle 511 entering and leaving the parking station 8 becomes very simple. The AVG chassis is directly driven into the parking station 8 with the frame, the tray and the electrode sheet, and then the elevator 512 directly starts to ascend and hold the tray. There is no need for the electrode sheet feeding vehicle 511 to enter the parking station 8 and then align with another independently set track.

[0066] In order to speed up the circulation of the AVG chassis and improve the working efficiency of the AVG chassis, a number of lifting cylinders 514 are arranged around the parking station 8 at the bottom of the production line, and the lifting cylinders 514 are connected to the hooks. The frame is provided with a slot structure that cooperates with the hooks. After the electrode sheet feeding vehicle 511 is in place at the parking station 8, the lifting cylinder 514 moves upward, and the hooks cooperate with the slots to fix the frame, and at the same time, the frame is lifted upward, so that the frame is separated from the AVG chassis, and then the AVG chassis can leave the parking station 8 to release the AVG chassis. Figure 4 As shown, after the lifting cylinder 514 cooperates with the hook to lift the entire frame, the stability of the frame can be improved to prevent the frame from shaking.

[0067] There are lifts 512 on the left and right sides of the parking station 8. The lift 512 preferably adopts a screw lifting system, including a servo motor, which drives the screw to rotate, and the screw cooperates with the screw nut to drive the lifting part to move up and down. The lifting part of the lift 512 and the tray are provided with mutually cooperating locking structures. In some embodiments, the locking structure can be a hook and a slot, or it can be a bracket on the left and right sides of the frame on the tray, and the lifting structure is provided with a mounting seat that cooperates with the bracket. The method adopted in the drawings of the present application is to set a number of positioning holes on the left and right sides of the tray, and then the lifting part is provided with a positioning column, and the positioning column is inserted into the positioning hole from the bottom to lock the tray. After the electrode sheet feeding cart 511 is in place at the parking station 8, the lifting part of the lift 512 is locked with the tray to drive the tray and the electrode sheet on the tray to move up and down synchronously.

[0068] In order to ensure the elevation accuracy of the top electrode sheet. A sensor for identifying the height of the electrode plate is fixedly installed on the top of the parking station 8. After the installation system 52 takes away the top electrode sheet, the elevator 512 drives the tray and the electrode sheet on the tray to move upward. When the top electrode sheet runs to the designed height, the sensor triggers the elevator 512 to stop moving. The sensor is placed horizontally to identify whether there is an electrode sheet at the elevation position of the top electrode sheet. When the elevator 512 drives the stacked electrode sheet upward, the sensor is triggered, indicating that the top electrode sheet has reached the set position. The elevator 512 stops moving and waits for the electrode sheet positioning system 513 to work.

[0069] Electrode positioning system introduction:

[0070] like Figure 3 As shown, the electrode sheet positioning system 513 also includes a pushing assembly. The pushing assembly can extend in the horizontal direction in the pushing state. The pushing moves the electrode sheet at the top, and moves the electrode sheet at the top horizontally to the material taking position of the installation system 52. As for the function, it has been mentioned in the previous text that, on the one hand, it is to prevent the installation system 52 from sticking to the electrode sheets below when grabbing the top electrode sheet, and on the other hand, it is to accurately position the electrode sheet.

[0071] After the push assembly is extended horizontally, the push portion is pressed directly above the other electrode sheets stacked except the top electrode sheet. In this way, by pressing the electrode sheet below with the push assembly, it is fundamentally prevented that the mounting system 52 will take away the electrode sheet below when grabbing the top electrode sheet.

[0072] The pushing assembly is arranged on one side of the top of the electrode sheet. When the pushing assembly is in a retracted state, its vertical projection does not overlap with the electrode sheet, thereby avoiding interference and collision between the electrode sheet and the pushing assembly when the electrode sheet moves upward.

[0073] Two groups of pushing assemblies are cross-arranged, and the two groups of pushing assemblies push two adjacent sides of the electrode sheet respectively. The pushing assembly includes a horizontal cylinder 5131. A pushing plate is installed on the horizontal cylinder 5131. A flexible buffer pad is covered on the pushing surface of the pushing plate. The electrode sheet positioning system 513 also includes a positioning baffle 5132. The two groups of positioning baffles 5132 are flush with the two adjacent sides of the electrode sheet, and a gap is reserved between the positioning baffle 5132 and the electrode sheet. The positioning baffles 5132 correspond to the pushing assemblies one by one, and the positioning baffles 5132 are respectively perpendicular to the pushing direction of the corresponding pushing assemblies.

[0074] Installation System Introduction

[0075] The installation system 52 picks up the electrode sheet that has been accurately positioned by the electrode sheet positioning system 513, places it on the material conveying system 1, and transfers it to the electrode frame at the set position. Therefore, the installation system 52 essentially includes a servo drive component and a jig installed on the servo drive component. The jig is provided with a number of suction cups that continuously generate negative pressure. After the suction cup absorbs the electrode sheet, it first translates upward, and then the electrode sheet is installed on the electrode frame. The electrode frame is made by the electrode frame welding system 4 and is transmitted to the electrode sheet fixing station by the material conveying system 1. The servo drive system here can adopt an industrial robot, a manipulator, or a track translation system with at least two degrees of freedom. First, the jig should translate upward as a whole after grabbing the electrode sheet. Then, the electrode sheet is installed on the electrode frame.

[0076] Working process of electrode sheet feeding system:

[0077] (1) The electrode sheet feeding vehicle 511 is loaded with stacked electrode sheets, and then the AVG chassis runs to the parking station 8 of the production line according to the designed route.

[0078] (2) Several lifting cylinders 514 on the parking station 8 drive the hooks to push upward. The hooks cooperate with the slots on the frame of the electrode sheet feeding vehicle 511 to lift the frame, the tray and the electrode sheet upward together, and fix the frame on the parking station 8. At this time, the AVG chassis is separated from the frame, and the AVG chassis drives away from the parking station 8 and can participate in other production operations.

[0079] (3) The lifting part of the lift 512 moves upward, and the locking structure of the lifting part cooperates with the tray and is fixed to the tray. Then, the lift 512 drives the tray and the electrode sheet to move upward together. At this time, the frame serves as a track and guardrail for the tray and the electrode sheet.

[0080] (4) When the top electrode sheet reaches the designed position, the sensor is triggered and the elevator 512 stops moving.

[0081] (5) The push assembly of the electrode sheet positioning system 513 is transformed into the push state, and the push plate moves horizontally to push the electrode sheet to contact the positioning baffle 5132. The two sets of push assemblies and the positioning baffle 5132 cooperate with each other to position the electrode sheet to the designed position. At this time, the push assembly presses on the top of the lower electrode sheet.

[0082] (6) The fixture of the installation system 52 absorbs and clamps the top electrode sheet positioned by the positioning system, and the electrode sheet clamped by the installation system 52 first moves upward and then moves to the electrode frame. After the installation system 52 clamps the top electrode sheet, before driving the top electrode sheet to move upward, the push assembly can retract backward while keeping the push plate of the push assembly pressed on the lower electrode sheet.

[0083] (7) The push assembly returns to the retracted state.

[0084] Repeat steps 3-7 until all the electrode sheets on the tray are loaded, and then proceed to step 8.

[0085] (8) The lift 512 moves downward and the pallet falls to the bottom of the frame, and then the lift 512 continues to move downward, and the locking structure of the lifting part of the lift 512 is separated from the pallet. At the same time, the AVG chassis returns to the parking station 8.

[0086] (9) The lifting cylinder 514 drops down, and the frame returns to the AVG chassis, and then the AVG chassis takes the frame and the empty pallet away from the production line.

[0087] Then start the next loading process.

[0088] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application, that is, the multiple embodiments described above can also be combined arbitrarily according to actual needs. All the above drawings are illustrative illustrations of this application and do not represent the actual size of the product, and the dimensional ratio relationship between the components in the drawings is not intended to limit the actual product of this application.

[0089] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A liquid flow battery electrode assembly production line, characterized in that: include: Material conveying system, used to convey materials to each processing station; The electrode frame substrate loading system loads the electrode frame substrate to the material conveying system; Electrode frame cover feeding system, which feeds the electrode frame cover to the material conveying system; The electrode frame welding system welds the electrode frame substrate and the electrode frame cover delivered by the material conveying system into an electrode frame; An electrode sheet feeding system is used to feed the electrode sheet onto the electrode frame on the material conveying system; the electrode sheet feeding system includes a feeding system for feeding the electrode sheet material, and a mounting system for mounting the electrode sheet from the feeding system onto the electrode frame; The electrode sheet fixing system fixes the electrode sheet and the electrode frame to form an electrode assembly; Unloading system, unloading the electrode assembly; The feeding system includes an electrode sheet feeding vehicle for carrying vertically stacked electrode sheets, a parking station for the electrode sheet feeding vehicle on the production line, a lift for moving the stacked electrode sheets upward as a whole on the parking station, and an electrode sheet positioning system for moving the top electrode sheet to a loading position; The electrode sheet positioning system also includes a pushing component, which can extend horizontally in the pushing state, push and move the electrode sheet located at the top, and move the top electrode sheet horizontally to the material picking position of the installation system. At the same time, after the pushing component is horizontally extended, the pushing part is pressed directly above the remaining electrode sheets stacked except the top electrode sheet, so as to avoid the installation system grabbing the top electrode sheet and sticking to the lower electrode sheet.

2. A liquid flow battery electrode assembly production line according to claim 1, characterized in that: The electrode sheet feeding vehicle comprises an AVG chassis, a frame body detachably mounted on the AVG chassis and a tray for holding the electrode sheets; The tray is arranged on a frame, and a plurality of vertical tracks are arranged on the frame, and the tray can slide up and down along the frame; a plurality of electrode sheets are stacked on the tray; the stacked electrode sheets are stuck between the frame and the tracks, and move up and down in translation under the constraints of the frame and the tracks.

3. A flow battery electrode assembly production line according to claim 2, characterized in that: A number of lifting cylinders are arranged around the parking station at the bottom of the production line, and the lifting cylinders are connected to hooks; the frame is provided with a slot structure cooperating with the hooks, and after the electrode sheet feeding vehicle is in place at the parking station, the lifting cylinder moves upward, and the hooks and slots cooperate to fix the frame, and at the same time lift the frame upward, so that the frame is separated from the AVG chassis, and then the AVG chassis can leave the parking station.

4. A liquid flow battery electrode assembly production line according to claim 2, characterized in that: There are lifts on the left and right sides of the parking station. The lifting part of the lift and the pallet are provided with mutually cooperating locking structures. After the electrode sheet feeding vehicle is in place at the parking station, the lifting part of the lift and the pallet are mutually locked to drive the pallet and the electrode sheet on the pallet to move up and down.

5. A flow battery electrode assembly production line according to claim 4, characterized in that: As described, a sensor for identifying the height of the electrode plate is fixedly installed on the top of the parking station. After the installation system takes away the top electrode sheet, the elevator drives the tray and the electrode sheet on the tray to move upward. When the top electrode sheet runs to the designed height, the sensor triggers the elevator to stop moving.

6. A liquid flow battery electrode assembly production line according to claim 1, characterized in that: The push assembly is arranged on one side of the top of the electrode sheet, and its vertical projection does not overlap with the electrode sheet when the push assembly is in a retracted state; Two groups of pushing components are cross-arranged, and the two groups of pushing components push two adjacent sides of the electrode sheet respectively; The push assembly comprises a horizontal cylinder, a push plate is installed on the horizontal cylinder, and a push surface of the push plate is covered with a flexible buffer pad.

7. A liquid flow battery electrode assembly production line according to claim 6, characterized in that: The electrode sheet positioning system also includes two sets of positioning baffles whose two adjacent sides of the electrode sheet are flush with each other, and a gap is reserved between the positioning baffles and the electrode sheet; The positioning baffles correspond to the pushing assemblies one by one, and the positioning baffles are respectively perpendicular to the pushing directions of the pushing assemblies corresponding to them.

8. The liquid flow battery electrode assembly production line according to claim 1, characterized in that: The installation system includes a servo drive component and a tooling fixture installed on the servo drive component. The tooling fixture is equipped with a number of suction cups that continuously generate negative pressure. After the suction cups absorb the electrode sheet, they first translate upward and then install the electrode sheet on the electrode frame. The electrode frame is made by an electrode frame welding system and transmitted to the electrode sheet fixing station by a material conveying system.

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