CN112238019B

CN112238019B - Extrusion system for flow battery bipolar plate production and extrusion method thereof

Info

Publication number: CN112238019B
Application number: CN202011494413.1A
Authority: CN
Inventors: 黄俊杰
Original assignee: Ningbo Jiefeng Plastics Co ltd
Current assignee: Ningbo Jiefeng Plastics Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-02-19
Anticipated expiration: 2040-12-17
Also published as: CN112238019A

Abstract

The invention relates to an extrusion system for producing a flow battery bipolar plate and an extrusion method thereof, which comprises an extrusion die, a heat preservation conveying roller and a sizing roller which are sequentially arranged and used for drawing the bipolar plate, and is characterized in that: the spraying module is arranged between the heat-preservation conveying roller and the shaping roller and is used for spraying an auxiliary agent to the bipolar plate; the spraying module at least comprises a spraying body with a gas input end, two auxiliary agent input ends and a spraying end; when spraying, the gas input end enters the gas and sprays to the spraying end to form a conveying gas flow, and all the auxiliary agents are discontinuously proportioned through the auxiliary agent input end, added into the spraying body, mixed under the action of the conveying gas flow and moved to the spraying end until being sprayed to the bipolar plate from the spraying end; the invention has the beneficial effects that: the conductive layer can be formed on the surface of the bipolar plate, the use effect of the bipolar plate is improved, and the proportion can be accurately matched, so that the forming quality of the conductive layer of the bipolar plate is ensured.

Description

Extrusion system for flow battery bipolar plate production and extrusion method thereof

Technical Field

The invention relates to the field of bipolar plate production, in particular to an extrusion system for producing a bipolar plate of a flow battery and an extrusion method thereof.

Background

With the development of the technology, the new wind and light lamp energy power generation technology is more and more emphasized, and as the wind and light lamp energy is difficult to store electric quantity during power generation, various batteries and power storage systems are needed to complete the storage of electric energy;

the bipolar plate is used as an indispensable component of a battery or an electricity storage system, is in contact with a porous carbon electrode when in use, is mainly responsible for collecting and transmitting the current of a positive electrode and a negative electrode, and the conductivity of the bipolar plate directly influences the internal resistance of a galvanic pile.

Disclosure of Invention

In view of the defects in the prior art, the present invention aims to provide an extrusion system for producing a flow battery bipolar plate and an extrusion method thereof, and aims to solve the problems in the background art.

The technical scheme of the invention is realized as follows: the utility model provides a flow battery bipolar plate production is with extrusion system, is including setting gradually and being used for pulling bipolar plate's extrusion tooling, heat preservation conveying roller and stock roll, its characterized in that: the spraying module is arranged between the heat-preservation conveying roller and the shaping roller and is used for spraying an auxiliary agent to the bipolar plate; the spraying module at least comprises a spraying body with a gas input end, two auxiliary agent input ends and a spraying end, wherein the spraying body is provided with a conveying cavity, and the conveying cavity is communicated with the gas input end, the auxiliary agent input ends and the spraying end; when spraying, the gas input end enters the gas and is sprayed to the spraying end to form conveying airflow, each auxiliary agent is added into each auxiliary agent input end, the electromagnetic control module controls the opening or closing of each auxiliary agent output end to carry out auxiliary agent proportioning and add the auxiliary agent into the conveying cavity of the spraying body, and the auxiliary agents are mixed under the action of the conveying airflow and move to the spraying end until being sprayed to the bipolar plate from the spraying end.

Preferably: the spraying body comprises a body with a conveying cavity, two feeding pipes arranged on the body and forming an auxiliary agent input end, an air inlet nozzle arranged on the body and forming an air input end, a discharge nozzle arranged on the body and forming a spraying end, and an electromagnetic control module arranged on the body and used for controlling the feeding pipes to be closed or opened.

Preferably: the electromagnetic control module comprises an electromagnet arranged on the body, an electromagnetic coil arranged in the electromagnet, a piston arranged in the electromagnetic coil, an iron core arranged in the electromagnetic coil and a compression spring with two ends abutting against the iron core and the piston, wherein one end of the piston penetrates into the conveying cavity and is used for closing or opening the feeding pipe; the iron core generates magnetism when the electromagnetic coil is electrified and attracts the piston to press the compression spring and move to enable the feeding pipe to be communicated with the conveying cavity, and the compression spring jacks up the piston to reset when the electromagnetic coil is powered off and enables the feeding pipe to be closed with the conveying cavity.

Preferably: the spraying bodies are provided with a plurality of spraying bodies and further comprise an air supply system for supplying air to all input ends simultaneously; the air supply system comprises an air pump, a main air pipe connected with the output end of the air pump, and a plurality of air supply pipes, wherein one ends of the air supply pipes are communicated with the main air pipe, and the other ends of the air supply pipes are communicated with the air inlet nozzles of the spraying bodies.

Preferably: each spraying body is provided with an anti-blocking port communicated with the conveying cavity; the anti-blocking device also comprises a plurality of anti-blocking modules which can extend into the anti-blocking ports and are used for cleaning the conveying cavity; the anti-blocking module comprises a plurality of dredging rods which correspond to the anti-blocking openings one by one and are controlled to move by cylinders, and a cleaning part arranged at the free end of each dredging rod; the cleaning part comprises a first cleaning part which is arranged at one end of the dredging rod and has a diameter of L1, a second cleaning part which is arranged on one side of the first cleaning part, which is far away from the dredging rod, and has a diameter of L2, and a third cleaning part which is arranged on one side of the second cleaning part, which is far away from the first cleaning part, and has a diameter of L3; wherein, L1> L2> L3, and the outer walls of the first cleaning part, the second cleaning part and the third cleaning part form a step-shaped cleaning surface.

Preferably: the dredging rod, the first cleaning part, the second cleaning part and the third cleaning part are all arranged in a hollow mode to form an air outlet cavity, and an air outlet is formed in one end, far away from the dredging rod, of the third cleaning part; first openings corresponding to the air inlet nozzles and electromagnetic valves corresponding to the feeding pipes are arranged on the dredging rod at intervals; the boosting system supplies air to the dredging rod and generates airflow flowing from the air outlet cavity to the air outlet or supplies air to the discharging nozzle and generates airflow flowing from the initial end of the discharging nozzle to the output end of the discharging nozzle; the boosting system comprises a boosting pump, a control valve and a boosting air pipe, wherein the control valve is at least provided with two output ends, the boosting air pipe is communicated with the output ends of the control valve through an air distribution pipe, and the output end of each boosting air pipe is respectively communicated with the dredging rod and the discharge nozzle.

Preferably: the outer side wall of the first cleaning part, the second cleaning part and the third cleaning part is provided with strip-shaped openings, the cavity wall of the gas outlet cavity is fixedly connected with a plurality of block material parts in a semi-annular shape, and the inner ring radius of each block material part is gradually enlarged from the gas outlet direction of the gas outlet cavity and distributed in a step shape.

Preferably: and an air suction opening is formed in the boosting air pipe communicated with the discharge nozzle, the air suction opening is connected with an air suction pipe, and the output end of the air suction pipe is communicated with an air suction pump.

In addition, the invention also provides a bipolar plate extrusion method which uses the extrusion system and is characterized by comprising the following steps:

s1: the bipolar plate is extruded from the extrusion die and continuously moves under the guidance of the heat-preservation conveying roller;

s2: adding an auxiliary agent into each feeding pipe;

s3: in the moving process of the bipolar plate, the electromagnetic coils of the electromagnetic control modules are electrified to enable the iron core to generate magnetism and attract the pistons, so that the discharge end of the feeding pipe is opened, the auxiliaries are added into the conveying cavity through the feeding pipe according to a preset proportion, the electromagnetic coils of the electromagnetic control modules are powered off after the feeding pipes convey the auxiliaries corresponding to the preset proportion, the pistons lose attraction of the iron core and reset, so that the discharge end of the feeding pipe is closed, and then gas is fed into the conveying cavity from the gas inlet nozzle by using a gas supply system to form conveying gas flow;

s4: after the auxiliary agents enter the conveying cavity, the auxiliary agents move to the discharging nozzles and are mixed under the action of conveying airflow, and the auxiliary agents are sprayed to the moving bipolar plate from the discharging nozzles to finish spraying the bipolar plate;

s5: continuously spraying until the auxiliary agents are sprayed, stopping the heat-preservation conveying roller and the air supply system, electrifying the electromagnetic coils of the electromagnetic control modules again to enable the iron core to generate magnetism and attract the piston, opening the feeding pipe, adding the auxiliary agents into the conveying cavity through the discharging end of the feeding pipe according to a preset proportion, powering off the electromagnetic coils of the electromagnetic control modules after the feeding pipes finish conveying the auxiliary agents corresponding to the preset proportion, finishing discontinuous proportioning and feeding, then restarting the air supply system, feeding conveying airflow into the conveying cavities, finishing mixing and moving of the auxiliary agents in the conveying cavities by utilizing the conveying airflow, and spraying the auxiliary agents onto the bipolar plate from the discharging nozzles;

s6: the sprayed bipolar plate is shaped by the shaping roller and then is moved out, and the spraying process of the bipolar plate is completed. Preferably: further comprising a spare spraying step, the spare spraying step comprising:

a1: when impurities remain in the conveying cavity, an electromagnetic coil of the electromagnetic control module is electrified, so that the iron core generates magnetism and attracts the piston, the piston contracts and opens the conveying cavity, and then the cylinder controls the dredging rod to be inserted into the conveying cavity from the anti-blocking opening and clean the conveying cavity;

a2: in the process of moving the dredging rod, firstly, the third cleaning part is used for cleaning residual impurities, the thickness of the impurities is reduced for the first time, then the second cleaning part is used for cleaning the impurities, the thickness of the impurities is reduced for the second time, finally, the first cleaning part is used for removing the residual impurities, in addition, the first cleaning part, the second cleaning part and the third cleaning part move the cleaned impurities to the direction of the discharge nozzle, simultaneously, the air pump is opened, the boosting pump is used for supplying air to the dredging rod, and the air pump and the air exhaust pipe are used for pumping the impurities out of the discharge nozzle, so that the cleaning step is completed;

a3: after the completion clearance, solenoid electric module's solenoid outage, the iron core loses magnetism, the piston resets, and push up the mediation pole, make the entry of the solenoid valve on the mediation pole offset with the discharge end of inlet pipe, afterwards, add the auxiliary agent in to the inlet tube, through opening the solenoid valve on each mediation pole, make the auxiliary agent in the inlet tube enter into to the mediation pole in, and through the boosting pump to mediation pole in air feed and air supply system through first opening to mediation pole in air feed, two air currents make the auxiliary agent in the mediation pole remove and mix, and spout from the discharge nozzle, the completion is sprayed bipolar plate.

The invention has the beneficial effects that:

1) the invention makes it possible to spray an auxiliary agent (for example: high-conductivity powder and a bonding assistant) is sprayed on the bipolar plate, so that a layer of high-conductivity layer structure is formed on the surface of the bipolar plate, and when the bipolar plate is used, the internal resistance between the bipolar plate and an electrode can be reduced (the high-conductivity layer can be contacted with the electrode), so that the use effect of the bipolar plate is improved;

2) moreover, the spraying module of the invention can complete the discontinuous proportioning (or complement) of the auxiliary agent during spraying, and can realize two spraying (or spraying) modes in total, as follows:

the first method comprises the following steps: adding different additives (namely high-conductivity powder and bonding additive) into a conveying cavity (or into a feeding pipe, and proportioning the additives in the feeding pipe and adding the additives into the conveying cavity under the control of an electromagnetic control module) through different feeding pipes according to a preset proportion (namely, supplying power to an electromagnetic coil, and opening different discharging nozzles by using the electromagnetic control module to control the proportion of the additives), supplying gas into the conveying cavity, and spraying the mixed additives onto the bipolar plate through the discharging nozzles by using the gas as a boosting medium to complete spraying, wherein the conductive layer with high conductive effect can be uniformly distributed on the bipolar plate in an additive proportioning mode, so that the conductive performance of the bipolar plate is improved; meanwhile, when a certain additive is excessively added, the piston which controls the corresponding feeding pipe can be selectively opened, so that the corresponding additive is supplemented, the additive sprayed out of the discharge nozzle is ensured to be suitable for the bipolar plate with the specification, and the production quality of the bipolar plate can be further improved and the spraying controllability of the bipolar plate can be realized;

second, complement: one of the aids of the invention can be a mixture of high-conductivity powder and a bonding aid, and the other aid can be a bonding aid, and the principle is as follows: when spraying, the mixture and the prepared bonding auxiliary agent are respectively added into different feeding pipes, when spraying, only the feeding pipe filled with the mixture is opened and controlled (at the moment, the ratio of the two auxiliary agents is 1: 0), and the mixture is sprayed onto the bipolar plate from the discharging nozzle by supplying air, and when the viscosity of the mixture needs to be improved (namely, the fixing effect of the mixture and the bipolar plate is improved), the discharging end of the feeding pipe filled with the prepared bonding auxiliary agent can be selectively opened, namely: the feed pipe is selectively opened by an electromagnetic control module, the bonding auxiliary agent is added into the conveying cavity, and when the mixture is conveyed, the mixture can be mixed with the bonding auxiliary agent (for example, the original ratio of two materials in the mixture is 90:10, and in the production process, when the ratio of the bonding auxiliary agent needs to be increased due to the specification of the bipolar plate or other reasons, the prepared bonding auxiliary agent can be added into the conveying cavity, and the ratio of the two materials is changed to 85: 15), and the prepared bonding auxiliary agent is sprayed out from the discharge nozzle, so that the viscosity of the mixture can be increased, the viscosity of the high-conductivity powder can be increased, the effect of the high-conductivity powder on the bipolar plate can be improved, the conductive effect of the bipolar plate can be ensured, and the 'internal resistance' generated when the bipolar plate is used can;

3) moreover, the spraying ends are provided with a plurality of spraying ends, and the gas supply system can be used for simultaneously supplying gas to each conveying cavity, so that the synchronous and stable discharging of each discharging nozzle is ensured, and the spraying quality of the bipolar plate is further improved;

4) in order to avoid the blockage of the conveying cavity, the invention can also utilize the dredging rod to dredge the conveying cavity, namely: the dredging rod can be controlled by the cylinder to penetrate into the conveying cavity, the conveying cavity is cleaned by the cleaning part, and in order to avoid damaging the inner wall of the conveying cavity, the cleaning of the conveying cavity is dispersed for three times, namely: the third cleaning part is utilized to clean the top of the impurity layer, the thickness of the impurity layer is reduced, the thickness of the impurity layer is eliminated one by analogy, so that cleaning is completed, the blockage of the conveying cavity is avoided, and compared with the cleaning mode, the cleaning mode directly cleans the impurity layer at one time, the cleaning mode can avoid that the conveying cavity is damaged due to the fact that cleaning is too heavy once, and the adhesion of the impurity layer and the conveying cavity is too firm, so that the purpose of protecting the conveying cavity is achieved; at the same time, this arrangement also makes it possible to use a dredging rod to block the delivery chamber, thus controlling the number of spraying ends, for example: when the device is used, if the number of the spraying ends needs to be reduced, the dredging rods can be moved into the conveying cavity (the dredging rods in the state can be provided with no openings), and the conveying cavity is sealed by the dredging rods, so that the working effective amount of the conveying cavity is reduced, and different production requirements of bipolar plates with different specifications are met;

5) furthermore, the invention can also provide a temporary alternative route when the delivery chamber is damaged, namely: the dredging rod is moved into the conveying cavity, the dredging rod is jacked up from the bottom by a piston (in the arrangement, the dredging rod is hollow and is provided with an opening for medium movement), so that an electromagnetic valve on the dredging rod is tightly attached to the feeding pipe, the sealing effect is improved, meanwhile, the first opening on the dredging rod can admit air through the air inlet nozzle, a strip-shaped spraying path is formed, the spraying continuity of the bipolar plate is further ensured, and the production efficiency is ensured;

6) based on the point 4, in order to improve the cleaning effect, the strip-shaped notches are formed in the first cleaning portion, the second cleaning portion and the third cleaning portion, so that the cleaning effect of each cleaning portion on impurity layers can be improved, in order to prevent a large amount of cleaned impurity layers from entering the dredging rods, the material blocking portions are arranged in a step-shaped distribution mode, the dredging rods push the impurities to the discharging nozzles, the air suction pump and the boosting pump are used for intermittently sucking air and supplying air into the dredging rods, the impurities can be pumped away, the cleaning process is completed, the degree of cleanness of spraying the bipolar plate is guaranteed, and the production quality of the bipolar plate is guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view of a structure of a spray body according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the principle of gas supply in embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a schematic structural view of a cleaning part according to embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of embodiment 3 of the present invention;

FIG. 8 is a schematic structural view of a spray body according to embodiment 3 of the present invention;

fig. 9 is a schematic structural view of another design of a spray body according to embodiment 3 of the present invention.

Q is inlet gas, P is outlet gas/or exhaust gas, W is prepared adhesive, and G is mixed material.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to fig. 3, the present invention discloses an extrusion system for producing a bipolar plate of a flow battery, which includes an extrusion mold 11, a heat preservation conveying roller 12, and a shaping roller 13, which are sequentially arranged and used for drawing the bipolar plate 10, and in a specific embodiment of the present invention, includes a spraying module 20, which is arranged between the heat preservation conveying roller 12 and the shaping roller 13 and used for spraying an auxiliary agent to the bipolar plate 10; wherein, the spraying module 20 at least comprises a spraying body with a gas input end, two auxiliary agent input ends and a spraying end; when spraying, the gas input end enters the gas and is sprayed to the spraying end to form a conveying gas flow, each auxiliary agent is added into each auxiliary agent input end, the electromagnetic control module 30 controls the opening or closing of each auxiliary agent output end to carry out auxiliary agent proportioning and add the auxiliary agents into the spraying body, and the auxiliary agents are mixed and move to the spraying end under the action of the conveying gas flow until being sprayed to the bipolar plate 10 from the spraying end.

In the embodiment of the present invention, the spraying body comprises a body 200 having a conveying cavity 200a, two feeding pipes 201 disposed on the body 200 and constituting the auxiliary agent input end, an air inlet nozzle 202 disposed on the body 200 and constituting the gas input end, an air outlet nozzle 203 mounted on the body 200 and constituting the spraying end, and the electromagnetic control module 30 mounted on the body 200 and used for controlling the feeding pipes 201 to close or open.

In the embodiment of the present invention, the electromagnetic control module 30 includes an electromagnet 300 installed on the body 200, an electromagnetic coil 301 disposed in the electromagnet 300, a piston 302 disposed in the electromagnetic coil 301 and having one end penetrating into the conveying cavity 200a for closing or opening the feeding pipe, an iron core 303 disposed in the electromagnetic coil 301, and a compression spring 304 having two ends abutting against the iron core 303 and the piston 302; wherein the plunger 303 generates magnetism when the electromagnetic coil 301 is energized and attracts the piston 302 to press the compression spring 304 and move so as to communicate the feeding pipe 201 with the conveying cavity 200a, and the compression spring 304 jacks up the piston 302 to reset when the electromagnetic coil is de-energized and so as to seal the feeding pipe 201 with the conveying cavity 200 a.

In the specific embodiment of the invention, the spraying bodies are provided with a plurality of spraying bodies, and the spraying bodies further comprise an air supply system for supplying air to all input ends simultaneously; the air supply system comprises an air pump 40, a main air pipe 41 connected with the output end of the air pump 40, and a plurality of air supply pipes 42, wherein one ends of the air supply pipes are communicated with the main air pipe 41, and the other ends of the air supply pipes are communicated with the air inlet nozzles 202 of all the spraying bodies.

In the embodiment of the present invention, the piston 302 is provided with a sealing rubber portion 30200.

In addition, the present embodiment further provides a bipolar plate extrusion method using the above extrusion system, which is characterized by comprising the following steps:

s2: adding an auxiliary agent into each feeding pipe;

s6: the sprayed bipolar plate is shaped by the shaping roller and then is moved out, and the spraying process of the bipolar plate is completed.

Referring to fig. 1 to 3, the principle of the present embodiment is (it should be noted that Q in the present embodiment is schematically referred to as intake air):

the bipolar plate is extruded through the extrusion die, is kept warm and is drawn through the heat preservation conveying roller, and the conveying cavity of the spraying body starts proportioning in the process that the bipolar plate moves (or is drawn), namely: adding a certain proportion of auxiliary agents (for example, 0.02mm powdered carbon material and bonding auxiliary agent with a mass ratio of 95: 5) into the conveying cavity through each feeding pipe, adding the two auxiliary agents into the feeding pipes (in order to avoid the coagulation of materials in the feeding pipes due to environmental influence, a heater can be arranged on the outer wall of each feeding pipe), controlling the lifting of the piston by supplying power to each electromagnetic coil, when the piston (or a piston rod) descends, the feeding pipes are communicated with the conveying cavity, the auxiliary agents in the feeding pipes can be added into the conveying cavity, and after the addition of the auxiliary agents is finished, each electromagnetic coil can be powered off, the piston is reset by using a compression spring, so that the feeding pipes and the conveying cavity are re-closed, and further the end proportioning feeding is carried out (in the embodiment, because the proportion between the auxiliary agents can be 95: 5, the feeding pipes with the auxiliary agents added first, the sealing can be completed by utilizing the corresponding piston, then the feeding pipes with the corresponding proportion are added, and the sealing can be performed later, so that the flexibility of use is ensured);

it should be noted that:

in the embodiment, the same air pump can be used for supplying air to a plurality of conveying cavities simultaneously, so that the synchronism of material spraying of each discharging nozzle can be ensured, and the number of the spraying bodies in the embodiment can be determined according to the width of the bipolar plate, so that the production quality of the bipolar plate can be improved;

in addition, in this embodiment, the additive can realize discontinuous proportioning and can be controlled to be added into the conveying cavity, so that the additive can be mixed well in proportion, and the spraying quality of the bipolar plate is improved, that is: in the embodiment, the two pistons are used for controlling the amount of the additives entering the conveying cavity from each feeding pipe, so that each additive can be strictly used, and moreover, after each additive is excessively added, the corresponding piston can be opened, and another additive is added into the conveying cavity to be further used in a 'neutralization' manner, so that the stability of the use of the additives is ensured, and the spraying quality of the bipolar plate is ensured;

meanwhile, the embodiment utilizes the electromagnetic module to control, so that accurate control can be realized, and energy is saved to the maximum extent, namely: in the embodiment, when the feeding pipe is closed, the electromagnetic coil is powered off, and the feeding pipe is closed as a normal state in the spraying process, so that energy can be saved and energy consumption can be reduced;

in addition, the top of the piston of the present embodiment is provided with a sealing rubber part (in the present embodiment, the sealing rubber part may not be used, and may be determined according to actual use conditions), so that the sealing effect can be improved, that is: when the piston seals the feeding pipe, the sealing effect on the feeding pipe is improved, the matching part of the piston and the body can be sealed when the piston opens the feeding pipe, the sealing effect of the piston and the body is improved, and the cross section shape of the sealing rubber part is preferably selected to be semi-elliptical, so that materials can be guided during blanking, and a large amount of materials are prevented from being accumulated on the sealing rubber part;

of note are:

the two feeding pipes of this embodiment can also be used to feed the mixture a of powdered carbon material and bonding agent and the prepared bonding agent, and the function of the prepared bonding agent is to increase the viscosity of the mixture a, thereby increasing the viscosity of the mixture a and the bipolar plate and ensuring the electrical conductivity of the bipolar plate, and the principle of the feeding pipes in use is substantially the same as that described above, and the feeding pipes are characterized in that: during spraying, the piston on the left side moves downwards, the lower end of the feeding pipe on the left side is opened (the mixture A is added into the feeding pipe), and when the piston on the left side is opened, the mixture A enters the conveying cavity from the lower end of the feeding pipe on the left side (the output end of the feeding pipe can be closed or not closed after feeding to the conveying cavity), and is sprayed out from the discharging nozzle under the action of air of the air inlet nozzle, so that the mixture is sprayed onto the bipolar plate; if the viscosity of the mixture A needs to be improved, the lower end of the feeding pipe on the right side can be opened, the bonding auxiliary agent is added into the conveying cavity, the mixture A is mixed with the bonding auxiliary agent under the action of gas flow pushing, so that the viscosity of the mixture A is improved, the mixture A is sprayed onto the bipolar plate from the discharging nozzle, the viscosity between the mixture A and the bipolar plate can be improved, and the conductivity of the bipolar plate is ensured to be used (in the embodiment, the mixture A can also be added into the feeding pipe on the right side, and the prepared bonding auxiliary agent is added into the feeding pipe on the left side and can be selected according to specific conditions).

Example 2 is different from example 1 in that (in this example, Q is an intake gas, and P is an exhaust gas or both of them):

as shown in fig. 4-6, in the embodiment of the present invention, each spraying body is provided with an anti-blocking opening 50 communicated with the conveying cavity 200 a; the device also comprises a plurality of anti-blocking modules 60 which can extend into each anti-blocking port 50 and are used for cleaning the conveying cavity 200 a; the anti-blocking module 60 comprises a plurality of dredging rods 600 which correspond to the anti-blocking openings 50 one by one and move under the control of an air cylinder, and a cleaning part 601 arranged at the free end of the dredging rod 600; the cleaning part 601 comprises a first cleaning part 6011 with a diameter of L1 and mounted at one end of the dredging rod 600, a second cleaning part 6012 with a diameter of L2 and mounted on one side of the first cleaning part 6011 away from the dredging rod 600, and a third cleaning part 6013 with a diameter of L3 and mounted on one side of the second cleaning part 6012 away from the first cleaning part 6011; wherein, L1> L2> L3, and the outer walls of the first cleaning part 6011, the second cleaning part 6012 and the third cleaning part 6013 form a stepped cleaning surface.

In the specific embodiment of the present invention, the dredging rod 600, the first cleaning portion 6011, the second cleaning portion 6012, and the third cleaning portion 6013 are all hollow and form an air outlet cavity 600a, and an air outlet 600b is disposed at one end of the third cleaning portion 6013 away from the dredging rod 600; the dredging rod 600 is provided with first openings 70 corresponding to the air inlet nozzles 202 and electromagnetic valves 71 corresponding to the feeding pipes 201 at intervals; the air flow boosting device further comprises a boosting system 80 which supplies air to the dredging rod 600 and generates air flow flowing from the air outlet cavity 600a to the air outlet 600b or supplies air to the discharging nozzle 203 and generates air flow flowing from the initial end of the discharging nozzle 203 to the output end of the discharging nozzle 203; the boosting system 80 comprises a boosting pump 800, a control valve 802 which is communicated with the output end of the boosting pump 800 through a gas distribution pipe 801 and is provided with at least two output ends, and a boosting gas pipe 803 which is communicated with the output ends of the control valve 802, wherein the output end of each boosting gas pipe 803 is respectively communicated with the dredging rod 600 and the discharge nozzle 203.

In the specific embodiment of the present invention, the outer sidewalls of the first cleaning portion 6011, the second cleaning portion 6012, and the third cleaning portion 6013 are provided with strip-shaped notches 600c, the cavity wall of the gas outlet cavity 600a is fixedly connected with a plurality of material blocking portions 600d in a semi-ring shape, and the inner ring radius of each material blocking portion 600d gradually expands from the gas outlet direction of the gas outlet cavity 600a and is distributed in a step shape.

In the specific embodiment of the present invention, an air pumping port is formed on the boost air pipe communicated with the discharge nozzle 203, the air pumping port is connected to an air pumping pipe 90, and an air pumping pump 91 is communicated with an output end of the air pumping pipe 90.

In an embodiment of the present invention, the material blocking portion 600d may be formed by an annular groove formed on the gas outlet chamber 600a and disposed on an inner wall of the third cleaning portion 6013.

In addition, this embodiment also provides a spare spraying step, which includes: a1: when impurities remain in the conveying cavity, an electromagnetic coil of the electromagnetic control module is electrified, so that the iron core generates magnetism and attracts the piston, the piston contracts and opens the conveying cavity, and then the cylinder controls the dredging rod to be inserted into the conveying cavity from the anti-blocking opening and clean the conveying cavity;

With reference to fig. 4-6, the present embodiment provides a device for cleaning a delivery chamber, namely: referring to fig. 4, the present embodiment can control the dredging pipe to enter the conveying cavity or move away from the conveying cavity by using the cylinder, and the cleaning portion disposed on the end surface of the dredging pipe cleans the inner wall of the conveying cavity (especially the inner wall of the bottom of the conveying cavity), while the cleaning portion of the present embodiment is composed of a first cleaning portion, a second cleaning portion and a third cleaning portion, and due to the diameter change of each cleaning portion, referring to fig. 5 and 6, the inner wall of the conveying cavity can be cleaned hierarchically, that is: firstly, the third cleaning part with a shorter diameter is used for cleaning the impurities adhered to the inner wall of the conveying cavity, so that the adhering thickness of the impurities is reduced, and the second cleaning part and the first cleaning part are used for cleaning the impurities in sequence, so that the 'layered' cleaning can be realized, the cleaning effect is improved, and the damage to the inner wall of the conveying cavity can be avoided to a certain extent;

in more detail: the dredging rod of the embodiment can be repeatedly driven to and fro through the air cylinder, so that the cleaning degree of the conveying cavity is met, after the cleaning is finished, impurities can be moved towards the discharge nozzle (the impurities on the end face of the dredging pipe can be blown by the aid of air supplied to the boosting air pipe by the boosting pump), and the impurities at the discharge nozzle are pumped away by the air pumped by the air pump, so that the cleaning process is finished (in the air pumping process, the control valve is adjusted to be in a closed state with the boosting air pipe on the side of the air pumping pipe);

furthermore, this embodiment may provide a redundant "spray path" when the delivery chamber is broken, namely: when the conveying cavity is broken: the electromagnetic coil is electrified, the piston descends, the cylinder is used for controlling the dredging rod to move into the conveying cavity, after the dredging rod moves, the electromagnetic coil is powered off, the piston loses the adsorption force of the iron core and is reset through the compression spring and is abutted against the bottom of the dredging rod, the electromagnetic valves on the dredging rod are abutted against the output ends of the feeding pipes (the sealing effect of the electromagnetic valves and the output ends of the feeding pipes is improved), the first opening is abutted against the output ends of the air inlets (the sealing effect of the air inlets and the output ends of the air inlets and the air inlets can also be improved), a new spraying path is formed, auxiliaries in the feeding pipes can be added into the dredging rod in a matching mode through controlling the electromagnetic valves, are conveyed, moved and mixed through air and are sprayed out of the discharge nozzles, and;

mention may be made of:

the mediation pole of this embodiment can also be used for sealing the transport chamber to reduce the effective material that spouts of ejection of compact mouth and defeated the material, promptly: when the width of the bipolar plate in production is met by reducing the spraying material of the discharge nozzle, the dredging rod can be moved into the conveying cavity, the electromagnetic valve is not opened at the moment, and the electromagnetic valve can be installed at the first opening, so that the addition of the auxiliary agent and the conveying of gas are isolated, the number of the discharge nozzles is controlled, the bipolar plates with different sizes are produced, and the utilization rate of resources is improved;

secondly, the boost system not only can assist the aspiration pump to carry out the clearance of impurity, can also increase the blowout rate to the auxiliary agent for the auxiliary agent fuses more firmly with bipolar plate, promptly: when boosting, the control valve can be switched to a boosting air pipe (a control valve can also be arranged between the boosting air pipe and the air exhaust pipe) with the output end arranged at the discharge nozzle, when the auxiliary agent in the conveying cavity (or the dredging rod) is conveyed to the discharge nozzle through gas, the boosting air pipe supplies air and accelerates the speed of spraying the auxiliary agent, so that the fusion effect and the quality of the auxiliary agent and the bipolar plate are improved, and the production quality of the bipolar plate is improved; in addition, when the boosting system supplies gas to the boosting gas pipe communicated with the dredging rod, the gas entering the gas outlet cavity (or the conveying cavity) can be 'converged' with the gas entering the gas outlet cavity (or the conveying cavity) from the gas inlet nozzle, and the spraying rate of the auxiliary agent can be enhanced from different layers, so that the requirements of producing bipolar plates with different specifications are met, and the production is more diversified;

third, this embodiment can utilize the difference in height that hinders material portion when clearance impurity, can avoid a large amount of entering of impurity to give vent to anger the intracavity in the material portion that hinders that goes out the intracavity setting of gas chamber to avoid giving vent to anger the chamber and block up, and then ensure that the continuation that sprays goes on and effectively utilize to dredge the pole.

Example 3 differs from example 1 in that it is a modification of example 1, which cannot be used in common with example 2, as follows:

as shown in fig. 7 to 9, the present embodiment discloses an extrusion system for producing a bipolar plate of a flow battery, which includes an extrusion mold 11, a heat preservation conveying roller 12, and a sizing roller 13, which are sequentially disposed and used for drawing the bipolar plate 10, and in a specific embodiment of the present invention, includes a spraying module 20, which is disposed between the heat preservation conveying roller 12 and the sizing roller 13 and used for spraying an auxiliary agent to the bipolar plate 10; wherein, the spraying module 20 at least comprises a spraying body with a gas input end, two auxiliary agent input ends and a spraying end; when spraying, the gas input end enters the gas and is sprayed out to the spraying end to form conveying airflow, and all the auxiliary agents are discontinuously proportioned through the auxiliary agent input end, added into the spraying body, mixed under the action of the conveying airflow and moved to the spraying end until being sprayed out to the bipolar plate 10 from the spraying end.

In the embodiment of the present invention, the spraying body comprises a body 200 having a delivery cavity 200a, two feed pipes 201 disposed on the body 200 and constituting the input end of the auxiliary agent, an air inlet nozzle 202 disposed on the body 200 and constituting the input end of the gas, an air outlet nozzle 203 mounted on the body 200 and constituting the spraying end, and an electromagnetic control module 30 mounted on the body 200 and used for controlling the feed pipes 201 to close or open.

In the embodiment of the present invention, two bent portions 900 corresponding to the feeding pipes 201 are installed in the conveying cavity 200a, the bent portions 900 divide the conveying cavity 200a into a first cavity 2001a communicating with the air inlet nozzle 202, a second cavity 2002a communicating with the air outlet nozzle 203, and a third cavity 2003a communicating with the air outlet nozzle 203, and a first opening 901 for communicating the first cavity 2001a with the second cavity 2002a and a second opening 902 for communicating the second cavity 2002a with the third cavity 2003a are provided on the bent portions 900.

In the embodiment of the present invention, the piston 302 is provided with a piston cap 3020a for closing or opening the first opening 901 or the second opening 902 and for closing or opening the output end of the feeding tube 201.

Referring to fig. 7-9, the principle of this embodiment is (this embodiment is a variation of embodiment 1, and in this embodiment, W is schematically a preliminary adhesive and G is schematically a batch) as follows:

referring to fig. 8-9, in the present embodiment, during the material mixing, the mixed material (i.e., the mixture of the powdered carbon material and the bonding agent) may be added into the right feeding tube, the prepared bonding agent is added into the left feeding tube, during the material spraying, the right piston moves downward, the bottom end of the feeding tube is opened, the second opening is closed, the mixed material is added into the third chamber, after the addition is completed, the right piston moves upward, the top end of the feeding tube is closed, the second opening is opened, at this time, the gas is supplied to the conveying chamber through the gas inlet tube, and the gas passes through the first chamber, the first opening, the second chamber, the second opening and the third chamber in sequence, and the mixed material is sprayed onto the bipolar plate through the discharging nozzle, thereby performing the;

meanwhile, if the prepared bonding auxiliary agent is needed to improve the viscosity of the mixed material, the left piston can be controlled to descend, the bottom end of the left feeding pipe is opened, the bonding auxiliary agent is added into the second cavity, and the side piston is closed after the addition is finished, at the moment, the gas entering from the air inlet nozzle drives the bonding auxiliary agent in the second cavity to move to the third cavity, the bonding auxiliary agent is mixed with the mixed material and is sprayed out from the material outlet nozzle to be sprayed onto the bipolar plate, at the moment, the viscosity of the mixed material is improved due to the fact that the new bonding auxiliary agent is added into the mixed material (the proportion of the bonding auxiliary agent in the mixed material is improved), and the mixed material can be firmly fixed on the bipolar plate, so that the use of;

besides the above-mentioned material spraying manner, the present embodiment also provides a new material spraying mode, that is: the negative pressure that utilizes ejection of compact mouth department to produce drives the material in third chamber and the second chamber and removes to the ejection of compact mouth direction (the negative pressure of ejection of compact mouth department can produce with the arbitrary mode among the prior art), specifically is: when spraying, adding the mixed material into the feeding pipe on the left side, adding the prepared bonding auxiliary agent into the feeding pipe on the right side, when spraying, the piston on the left side is in a normally open state (namely, the piston on the left side moves downwards and blocks the first opening), at the moment, the mixed material in the feeding pipe on the left side enters the second cavity, guiding the material in the second cavity to the discharging nozzle through negative pressure generated at the discharging nozzle and spraying out, when the prepared bonding auxiliary agent is needed, the piston on the right side descends, the output end of the feeding pipe on the right side is opened, so that the bonding auxiliary agent in the feeding pipe on the right side is added into the third cavity, after the addition is finished, continuously closing the feeding pipe on the right side, and then mixing the materials in the second cavity and the third cavity by utilizing the negative pressure at the discharging nozzle and spraying out from the discharging nozzle, thereby improving the proportion of the bonding auxiliary agent in the mixed, thereby improving the production quality of the bipolar plate and ensuring the use effect of the bipolar plate, on the contrary, the mixed material can be added on the right side, and the bonding auxiliary agent is added on the left side.

It is worth noting that: the two feeding pipes of the embodiment can be optionally added with a mixed material or a prepared bonding auxiliary agent, and the stable spraying of the embodiment can be ensured only by controlling the application of the piston; the advantages of this embodiment are: the negative pressure of the embodiment is formed at the discharging nozzle (the negative pressure can be formed by any device or method in the prior art), the negative pressure can also form virtual air flow in the conveying cavity to assist the movement of the auxiliary agent, and the air does not enter through the air inlet end, so that the flow stroke of the air can be shortened, the impact force when the auxiliary agent is sprayed out is improved, and the fixing effect of the auxiliary agent and the bipolar plate is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a flow battery bipolar plate production is with extrusion system, is including setting gradually and being used for pulling extrusion tooling (11), heat preservation conveying roller (12) and the design roller (13) of bipolar plate (10), its characterized in that: comprises a spraying module (20) which is arranged between the heat-preservation conveying roller (12) and the shaping roller (13) and is used for spraying an auxiliary agent to the bipolar plate (10); the spraying module (20) at least comprises a spraying body with a gas input end, two auxiliary agent input ends and a spraying end, the spraying body is provided with a conveying cavity (200 a), and the conveying cavity (200 a) is communicated with the gas input end, the auxiliary agent input ends and the spraying end; when spraying, the gas input end enters the gas and is sprayed to the spraying end to form conveying airflow, each auxiliary agent is added into each auxiliary agent input end, the electromagnetic control module (30) controls the opening or closing of each auxiliary agent output end to carry out auxiliary agent proportioning and is added into the conveying cavity (200 a) of the spraying body, and the auxiliary agents are mixed under the action of the conveying airflow and move to the spraying end until being sprayed to the bipolar plate (10) from the spraying end; each spraying body is provided with an anti-blocking opening (50) communicated with the conveying cavity (200 a); the device also comprises a plurality of anti-blocking modules (60) which can extend into the anti-blocking openings (50) and are used for cleaning the conveying cavity (200 a); the anti-blocking module (60) comprises a plurality of dredging rods (600) which correspond to the anti-blocking openings (50) one by one and are controlled to move by cylinders, and a cleaning part (601) which is arranged at the free end of each dredging rod (600); the cleaning part (601) comprises a first cleaning part (6011) which is installed at one end of the dredging rod (600) and has a diameter of L1, a second cleaning part (6012) which is installed on one side, away from the dredging rod (600), of the first cleaning part (6011) and has a diameter of L2, and a third cleaning part (6013) which is installed on one side, away from the first cleaning part (6011), of the second cleaning part (6012) and has a diameter of L3; the cleaning device comprises a first cleaning part (6011), a second cleaning part (6012) and a third cleaning part (6013), wherein L1> L2> L3, and the outer walls of the first cleaning part (6011), the second cleaning part (6012) and the third cleaning part (6013) form a stepped cleaning surface.

2. The extrusion system for producing the bipolar plate of the flow battery as claimed in claim 1, wherein: the spraying body comprises a body (200) with a conveying cavity (200 a), two spraying bodies and an electromagnetic control module (30), wherein the two spraying bodies are arranged on the body (200) and form the feeding pipe (201) of the auxiliary agent input end, the spraying bodies are arranged on the body (200) and form the air inlet nozzle (202) of the air input end, the spraying bodies are arranged on the body (200) and form the discharging nozzle (203) of the spraying end and the electromagnetic control module (30) arranged on the body (200) and used for controlling the closing or opening of the feeding pipe (201).

3. The extrusion system for producing the bipolar plate of the flow battery as claimed in claim 2, wherein: the electromagnetic control module (30) comprises an electromagnet (300) arranged on the body (200), an electromagnetic coil (301) arranged in the electromagnet (300), a piston (302) arranged in the electromagnetic coil (301), one end of the piston penetrates into the conveying cavity (200 a) and is used for closing or opening the feeding pipe, an iron core (303) arranged in the electromagnetic coil (301), and a compression spring (304) with two ends abutting against the iron core (303) and the piston (302); wherein the iron core (303) generates magnetism when the electromagnetic coil (301) is electrified and attracts the piston (302) to press the compression spring (304) and move so as to enable the feed pipe (201) to be communicated with the conveying cavity (200 a), and the compression spring (304) jacks up the piston (302) to reset when the electromagnetic coil is powered off and enables the feed pipe (201) to be closed with the conveying cavity (200 a).

4. The extrusion system for producing a flow battery bipolar plate according to claim 3, wherein: the spraying bodies are provided with a plurality of spraying bodies and further comprise an air supply system for supplying air to all input ends simultaneously; the air supply system comprises an air pump (40), a main air pipe (41) connected with the output end of the air pump (40), and a plurality of air supply pipes (42) with one ends communicated with the main air pipe (41) and the other ends communicated with the air inlet nozzles (202) of each spraying body.

5. The extrusion system for producing the bipolar plate of the flow battery as claimed in claim 1, wherein: the dredging rod (600), the first cleaning part (6011), the second cleaning part (6012) and the third cleaning part (6013) are all arranged in a hollow mode to form an air outlet cavity (600 a), and an air outlet (600 b) is formed in one end, far away from the dredging rod (600), of the third cleaning part (6013); first openings (70) corresponding to the air inlet nozzles (202) and electromagnetic valves (71) corresponding to the feeding pipes (201) are arranged on the dredging rod (600) at intervals; the device also comprises a boosting system (80) which supplies air to the dredging rod (600) and generates airflow flowing from the air outlet cavity (600 a) to the air outlet (600 b) or supplies air to the discharging nozzle (203) and generates airflow flowing from the initial end of the discharging nozzle (203) to the output end of the discharging nozzle (203); the boosting system (80) comprises a boosting pump (800), a control valve (802) with at least two output ends and a boosting air pipe (803) communicated with the output ends of the control valve (802) through an air distribution pipe (801), wherein the output ends of the boosting air pipes (803) are respectively communicated with a dredging rod (600) and a discharge nozzle (203).

6. The extrusion system for flow battery bipolar plate production according to claim 5, wherein: the outer side wall of the first cleaning part (6011), the second cleaning part (6012) and the third cleaning part (6013) is provided with strip-shaped gaps (600 c), a plurality of material blocking parts (600 d) in a semi-ring shape are fixedly connected to the wall of the gas outlet cavity (600 a), and the inner ring radius of each material blocking part (600 d) is gradually enlarged from the gas outlet direction of the gas outlet cavity (600 a) and distributed in a step shape.

7. The extrusion system for producing a flow battery bipolar plate according to claim 6, wherein: an air suction opening is formed in the boosting air pipe communicated with the discharge nozzle (203), the air suction opening is connected with an air suction pipe (90), and an air suction pump (91) is communicated with the output end of the air suction pipe (90).

8. A bipolar plate extrusion method using the extrusion system of claim 7, comprising the steps of:

s2: adding an auxiliary agent into each feeding pipe;

9. A bipolar plate extrusion process as set forth in claim 8, wherein: further comprising a spare spraying step, the spare spraying step comprising: