CN113813849A - Dry mixing device and mixing method for supercapacitor pole piece material - Google Patents
Dry mixing device and mixing method for supercapacitor pole piece material Download PDFInfo
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Abstract
The invention relates to the technical field of super capacitors, and discloses a dry mixing device and a dry mixing method for a pole piece material of a super capacitor, wherein the mixing device comprises: the material storage barrel is provided with a material inlet pipe and a material outlet pipe; the primary feeding port and the primary discharging port are arranged on the primary charging barrel, and the first connecting pipe is arranged on the primary charging barrel; the secondary charging barrel is provided with a secondary feeding hole, a secondary discharging hole and a second connecting pipe; the vacuum pump is provided with a first exhaust pipe and a second exhaust pipe; a first valve is arranged on the first connecting pipe, a second valve is arranged on the feeding pipe, a third valve is arranged on the first exhaust pipe, a fourth valve is arranged on the discharging pipe, a fifth valve is arranged on the second connecting pipe, and a sixth valve is arranged on the second exhaust pipe; and controlling the terminal. The invention has the advantages of high mixing efficiency, uniform mixing, good mixing effect and continuous production.
Description
Technical Field
The invention relates to the technical field of super capacitor devices, in particular to a dry mixing device and a dry mixing method for a pole piece material of a super capacitor.
Background
The super capacitor is a novel energy storage device, and compared with the traditional capacitor and a lithium ion battery, the super capacitor is widely applied in various fields due to the characteristics of quick charge and discharge and energy storage. However, the production efficiency of the pole piece of the super capacitor at the present stage is low, the mixing process is complex, and the uniformity of the produced pole piece is not good.
The technological process of dry pulping is that active matter, conducting agent and other powder matter are first premixed at certain speed. And after mixing, adding the binder, mixing and stirring, gradually adding the solvent for mixing and dispersing, and finally adding a certain amount of solvent for dilution and adjustment to the viscosity required by coating.
For example, patent "CN 110085452A" discloses a full-automatic supercapacitor slurry mixing and slurry dispersibility detection device and method. The device comprises: a slurry stirring kettle; a viscometer; a slurry dilution tank; the stirring paddle comprises a first stirring paddle and a second stirring paddle; the diameter measuring system comprises a pool to be measured with particle size distribution, a laser emitter, a microscope objective, a collimating lens, a Fourier lens, a photoelectric detector and an amplifying converter; and a first valve and a first pump; a second valve and a second pump; a third pump, a fourth pump, a fifth pump, a sixth pump, a seventh pump, an eighth pump, and a ninth pump; and (5) controlling the system. The manufacturing method has the advantages of low mixing efficiency, insufficient mixing uniformity, low fault tolerance rate when manufacturing the high-quality pole piece.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a dry mixing device and a dry mixing method for a supercapacitor pole piece material, which can realize continuous production, high mixing efficiency and good mixing effect.
The technical scheme adopted by the invention for solving the technical problem is to provide a dry mixing device for a pole piece material of a super capacitor, which comprises the following components:
the storage barrel is provided with a feeding pipe and a discharging pipe;
the primary mixing system comprises a primary charging barrel, and a primary stirring mechanism, a primary heating mechanism and a primary granularity detector which are all arranged in the primary charging barrel, wherein the primary stirring mechanism is used for stirring materials in the primary charging barrel; the primary heating mechanism is used for heating the primary charging barrel; the primary particle size detector is used for detecting the particle size of the material in the primary charging barrel; the primary charging barrel is provided with a primary charging hole and a primary discharging hole, and the primary discharging hole is communicated with the charging pipe through a first connecting pipe;
the secondary mixing system comprises a secondary charging barrel, and a secondary stirring mechanism, a secondary heating mechanism and a secondary particle size detector which are all arranged in the secondary charging barrel, wherein the secondary stirring mechanism is used for stirring materials in the secondary charging barrel; the secondary heating mechanism is used for heating the secondary charging barrel; the secondary particle size detector is used for detecting the particle size of the material in the secondary charging barrel; a second-stage feeding hole and a second-stage discharging hole are formed in the second-stage charging barrel, and the second-stage feeding hole is communicated with the discharging pipe through a second connecting pipe;
the vacuum pump is used for pumping the storage pump and the secondary charging barrel into a low-pressure or vacuum state, a first air pumping pipe and a second air pumping pipe are arranged on the vacuum pump, the first air pumping pipe is communicated with the feeding pipe, and the second air pumping pipe is communicated with the second connecting pipe; a first valve is arranged on the first connecting pipe, a second valve is arranged on the feeding pipe, a third valve is arranged on the first air exhaust pipe, a fourth valve is arranged on the discharging pipe, a fifth valve is arranged on the second connecting pipe, and a sixth valve is arranged on the second air exhaust pipe;
and the control terminal is used for controlling the primary granularity detector, the secondary granularity detector, the primary heating mechanism and the secondary heating mechanism.
The bottom of the secondary material cylinder is also provided with a rotating mechanism for driving the secondary material cylinder to rotate, and the secondary material cylinder and the rotating mechanism are both arranged in the outer box;
the first-stage stirring mechanism and the second-stage stirring mechanism can rotate, and the rotating direction of the rotating mechanism is opposite to that of the second-stage stirring mechanism.
Further, the stirring device also comprises a speed controller which is in signal connection with the control terminal and is used for controlling the speed of the bottom rotating mechanism, the speed of the secondary stirring mechanism and the speed of the secondary charging barrel.
Further, be equipped with the primary filter on the inlet pipe, be equipped with the secondary filter on the discharging pipe.
The particle size detection device further comprises a temperature controller, a motor controller and a particle size detection system, wherein the temperature controller is used for controlling the temperature of the primary heating mechanism and the secondary heating mechanism, and the temperature controller is in signal connection with the control terminal;
the primary stirring mechanism comprises a motor, the motor controller is used for controlling the motor, and the motor controller is in signal connection with the control terminal;
the granularity detection system is used for controlling the primary granularity detector and the secondary granularity detector and is in signal connection with the control terminal.
Further, second grade rabbling mechanism is including from last magnetic stirring control appearance, magnetic transmission pole and the stirring piece that sets gradually down.
The technical scheme adopted by the invention for solving the technical problem is to provide a dry mixing method of the pole piece material of the super capacitor, which is applied to the dry mixing device of the pole piece material of the super capacitor and comprises the following steps:
starting a first-stage heating mechanism, acquiring the actual environmental temperature in the first-stage charging barrel, and performing the next step when the actual environmental temperature in the first-stage charging barrel reaches the first-stage charging barrel environmental temperature set by the control terminal;
starting the primary stirring mechanism, judging whether the primary stirring mechanism is stable in operation, and if so, entering the next step;
opening a first-stage feeding hole, closing a first-stage discharging hole and a first valve, and adding a pole piece material into a first-stage charging barrel; the primary stirring mechanism is used for carrying out primary stirring on the mixture; the primary particle size detector collects particle size data of the polar plate material in the primary charging barrel for multiple times, and when the particle size of the polar plate material is smaller than or equal to a first preset value set by the control terminal, the primary stirring mechanism stops;
opening a second valve and a sixth valve, and operating a vacuum pump, wherein the vacuum pump pumps the primary charging barrel to a first preset air pressure state;
opening a first-stage discharge port and a first valve, and sucking the pole piece materials in the first-stage stirring mechanism into a material storage barrel under the action of air pressure difference; then closing the second valve, the third valve and the vacuum pump;
starting a secondary heating mechanism, acquiring the actual environment temperature in the secondary charging barrel, and performing the next step when the actual environment temperature in the secondary charging barrel reaches the secondary charging barrel environment temperature set by the control terminal;
opening a fifth valve and a sixth valve, and operating a vacuum pump, wherein the vacuum pump pumps the secondary charging barrel to a second preset air pressure state;
opening a fourth valve, and sucking the pole piece materials in the material storage cylinder into the secondary charging cylinder under the action of air pressure difference; then closing the fifth valve, the sixth valve and the vacuum pump;
the secondary stirring mechanism is used for carrying out secondary stirring on the pole piece materials in the secondary charging barrel, the secondary granularity detector is used for collecting granularity data of the pole piece materials in the secondary charging barrel for multiple times, and when the grain diameter of the pole piece materials is smaller than or equal to a second preset value set by the control terminal, the secondary stirring mechanism is stopped;
and taking out the pole piece material subjected to secondary stirring from the secondary discharge hole.
Further, the environmental temperature of the primary charging barrel set by the control terminal is more than or equal to 40 ℃, and the humidity range is between 5% and 20%;
the environmental temperature of the secondary charging barrel set by the control terminal is more than or equal to 40 ℃, and the humidity range is between 5% and 20%.
Further, before sucking the pole piece material into the secondary charging barrel from the storage barrel, the secondary stirring mechanism is subjected to trial operation:
and starting the second-stage stirring mechanism, judging whether the first-stage stirring mechanism operates stably, and if so, sucking the pole piece material into the second-stage charging barrel from the storage barrel.
Further, the pole piece material comprises activated carbon, and/or carbon aerogel, and/or carbon nano tubes, and/or porous graphene, and/or porous carbon black, and/or porous carbon composite material, and/or lithium iron phosphate, and/or lithium cobaltate, and/or lithium manganate.
Compared with the prior art, the invention has at least the following beneficial effects:
in the invention, before mixing, the particle size of the pole piece material of the super capacitor is controlled to be a first gradient size through a primary mixing system, and the pole piece material enters a storage cylinder after passing through a primary filter; and in getting into second grade compounding system behind the second grade filter, the granularity size control of ultracapacitor system pole piece material is at second gradient size, guarantees ultracapacitor system pole piece material misce bene, compares in traditional compounding technology, and its misce bene degree can improve 15% -25%, and its mixing efficiency can improve 20% -30% by a wide margin, in the second grade compounding system, through the rotation of second grade stirring piece and the rotation of second grade feed cylinder, and rotation opposite direction between them, guarantees the mixed effect, improves mixing efficiency. The slurry produced by the process has better performance, the viscosity, granularity, solid content stability and the like of the slurry are better than those of the slurry obtained by a fluid dispersion process, the resistivity of the prepared membrane is lower, the bonding force is higher, the capacity retention rate of the prepared battery cell is higher, the prepared battery cell has higher mixing efficiency, the uniformity of mixed powder can be detected in real time, the uniformity is compared with the parameters set by the control terminal, the stirring condition of the mixing device is monitored in real time, and continuous production can be realized.
In the invention, the first-stage mixing system and the second-stage mixing system are connected through transition between the storage barrels, when an error occurs in a certain link, the mixing effect can be ensured through multi-stage stirring and filtering, the influence on the final mixing effect is small, and the fault-tolerant rate is high; and the vacuum pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are used for controlling the opening and the closing of the valve under the synergistic action, so that the transfer of the pole piece materials of the super capacitor is ensured, the pole piece materials of the super capacitor in each link are ensured not to be mixed with each other, the backflow condition is avoided, the safety is good, and the mixing effect is good.
In the invention, before primary stirring and secondary stirring, the environment of the primary charging barrel and the environment of the secondary charging barrel are firstly adjusted into a drying environment controlled by a control terminal in advance, so that the dryness (temperature and humidity) of the mixing environment is ensured; and before one-level stirring and second grade stirring, try on one-level rabbling mechanism and second grade rabbling mechanism earlier, when the trial run is errorless the back, reinforced again, guarantee that ultracapacitor system pole piece material can not appear the condition that needs to do over again because of the trouble of one-level rabbling mechanism and second grade rabbling mechanism, and when the material mixes the back, do over again and can not reach the effect of mixing certainly.
Drawings
Fig. 1 is a schematic structural view of a dry mixing apparatus according to the present invention.
In the figure:
1. a primary charging barrel; 2. a primary stirring mechanism; 3. a primary heating mechanism; 4. a primary particle size detector; 5. a first-stage feed inlet; 6. a first-stage discharge hole; 7. a secondary charging barrel; 8. a second-stage stirring mechanism; 9. a secondary heating mechanism; 10. a secondary particle size detector; 11. a secondary feed inlet; 12. a secondary discharge hole; 13. a vacuum pump; 14. a control terminal; 15. an outer case; 16. a rotation mechanism; 17. a first stage filter; 18. a secondary filter; 19. a motor; 20. a magnetic stirring controller; 21. a magnetic transmission rod; 22. a speed controller; 23. a temperature controller; 24. a motor controller; 25. a particle size detection system;
30. a storage cylinder; 31. a first valve; 32. a second valve; 33. a third valve; 34. a fourth valve; 35. a fifth valve; 36. a sixth valve;
A. a feed pipe; B. a discharge pipe; C. a first connecting pipe; D. a second connecting pipe; E. a first exhaust tube; F. and a second exhaust tube.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a dry mixing device for pole piece materials of a supercapacitor comprises: storage cylinder 30, first grade compounding system, second grade compounding system, vacuum pump 13 and control terminal 14.
The material storage barrel 30 is provided with a material inlet pipe A and a material outlet pipe B; wherein, be equipped with primary filter 17 on the inlet pipe A, be equipped with secondary filter 18 on the discharging pipe B, after ultracapacitor system pole piece material mixes through the one-level, before getting into storage barrel 30, through and filter 17 guarantee that the ultracapacitor system pole piece material that does not mix and satisfy the requirement can't get into storage barrel 30, and before taking out ultracapacitor system pole piece material in storage barrel 30 from to secondary feed cylinder 7, also need pass through secondary filter 18, guarantee to let in ultracapacitor system pole piece material in the secondary feed cylinder 7 and satisfy the requirement after mixing for the first time. Specifically, the filter particle size of each of the primary filter 17 and the secondary filter 18 may be set to 15 um.
The primary mixing system comprises a primary charging barrel 1, and a primary stirring mechanism 2, a primary heating mechanism 3 and a primary particle size detector 4 which are all arranged in the primary charging barrel 1, wherein the primary stirring mechanism 2 is used for stirring materials in the primary charging barrel 1; the primary heating mechanism 3 is used for heating the primary charging barrel 1; the primary particle size detector 4 is used for detecting the particle size of the material in the primary charging barrel 1; the primary charging barrel 1 is provided with a primary charging port 5 and a primary discharging port 6, and the primary discharging port 6 is communicated with the charging pipe A through a first connecting pipe C; wherein, one-level rabbling mechanism 2 is still including motor 19, and through motor 19 drive stirring piece rotation, and then carry out the one-level stirring, what motor 19 adopted is servo motor.
The secondary mixing system comprises a secondary charging barrel 7, and a secondary stirring mechanism 8, a secondary heating mechanism 9 and a secondary particle size detector 10 which are all arranged in the secondary charging barrel 7, wherein the secondary stirring mechanism 8 is used for stirring materials in the secondary charging barrel 7; the secondary heating mechanism 9 is used for heating the secondary material barrel 7; the secondary particle size detector 10 is used for detecting the particle size of the material in the secondary charging barrel 7; a secondary feed inlet 11 and a secondary discharge outlet 12 are formed in the secondary charging barrel 7, and the secondary feed inlet 11 is communicated with the discharge pipe B through a second connecting pipe D; the mixing device further comprises an outer box 15, a rotating mechanism 16 for driving the secondary material cylinder 7 to rotate is further arranged at the bottom of the secondary material cylinder 7, and the secondary material cylinder 7 and the rotating mechanism 16 are both arranged in the outer box 15; and the first-stage stirring mechanism 2 and the second-stage stirring mechanism 8 can rotate, the rotating direction of the rotating mechanism 16 is opposite to that of the second-stage stirring mechanism 8, and the rotating direction of the rotating mechanism 16 is opposite to that of the second-stage stirring mechanism 8, so that the uniform mixing efficiency and the uniform degree of the pole piece materials of the supercapacitor are further improved. Specifically, second grade rabbling mechanism 8 drives transmission rod 21 through magnetic stirring control instrument 20 including from last magnetic stirring control instrument 20, magnetic transmission rod 21 and the stirring piece that sets gradually extremely down, and then the drive stirring piece rotates, carries out abundant stirring to the material in the second grade feed cylinder 7. The primary heating mechanism 3 and the secondary heating mechanism 9 can adopt heating plates, the materials of the heating plates can adopt electrothermal alloy wires, and the maximum power of the heating plates is 2000W; both the primary particle size detector 4 and the secondary particle size detector 10 can adopt a laser diffraction particle size analyzer MS 3000.
In the actual working process, before mixing, the particle size of the pole piece material of the super capacitor is controlled to be a first gradient size through a first-stage mixing system, and the pole piece material enters a storage barrel 30 after passing through a first-stage filter 17; and in the second grade compounding system after second grade filter 18, with the granularity size control of ultracapacitor system pole piece material at second gradient size, guarantee ultracapacitor system pole piece material misce bene, compare in traditional compounding technology, its misce bene degree can improve 15% -25%, and its mixing efficiency can improve 20% -30% by a wide margin, in the second grade compounding system, through the rotation of second grade stirring piece and the rotation of second grade feed cylinder 7, and rotation opposite direction between them, guarantee the mixing effect, improve mixing efficiency. The slurry produced by the process has better performance, the viscosity, granularity, solid content stability and the like of the slurry are better than those of the slurry obtained by a fluid dispersion process, the resistivity of the prepared membrane is lower, the bonding force is higher, the capacity retention rate of the prepared battery cell is higher, the mixing efficiency is higher, the uniformity of mixed powder can be detected in real time, the uniformity is compared with the parameters set by the control terminal 14, the stirring condition of the mixing device is monitored in real time, and continuous production can be realized.
The vacuum pump 13 is used for pumping the storage pump and the secondary charging barrel 7 into a low-pressure or vacuum state, a first air pumping pipe E and a second air pumping pipe F are arranged on the vacuum pump 13, the first air pumping pipe E is communicated with the feeding pipe A, and the second air pumping pipe F is communicated with the second connecting pipe D; a first valve 31 is arranged on the first connecting pipe C, a second valve 32 is arranged on the feeding pipe A, a third valve 33 is arranged on the first air suction pipe E, a fourth valve 34 is arranged on the discharging pipe B, a fifth valve 35 is arranged on the second connecting pipe D, and a sixth valve 36 is arranged on the second air suction pipe F; wherein the flow control range of the vacuum pump 31 is 100m3/h～300m3And the vacuum pump can adopt a carbon steel air pump.
In the actual use process, the device is connected with the primary mixing system and the secondary mixing system through transition in the middle of the storage barrel 30, when an error occurs in a certain link, the mixing effect can be ensured through multi-stage stirring and filtering, the influence on the final mixing effect is small, and the fault-tolerant rate is high; and the vacuum pump 13, the first valve 31, the second valve 32, the third valve 33, the fourth valve 34, the fifth valve 35 and the sixth valve 36 are used for controlling the opening and the closing of the valves, so that the transfer of the pole piece materials of the super capacitor is ensured, the pole piece materials of the super capacitor in each link are ensured not to be mixed with each other, the backflow situation is avoided, the safety is good, and the mixing effect is good.
And the control terminal 14 is used for controlling the primary granularity detector 4, the secondary granularity detector 10, the primary heating mechanism 3 and the secondary heating mechanism 9. The control terminal 14 is a PC terminal. And specifically, the mixing device further comprises a speed controller 22 in signal connection with the control terminal 14, wherein the speed controller 22 is used for controlling the speed of the bottom rotating mechanism 16, the secondary stirring mechanism 8 and the secondary material barrel 7. The mixing device further comprises a temperature controller 23, a motor controller 24 and a particle size detection system 25, wherein the temperature controller 23 is used for controlling the temperature of the primary heating mechanism 3 and the secondary heating mechanism 9, and the temperature controller 23 is in signal connection with the control terminal 14; the motor controller 24 is used for controlling the motor 19, and the motor controller 24 is in signal connection with the control terminal 14; the particle size detection system 25 is used for controlling the primary particle size detector 4 and the secondary particle size detector 10, and the particle size detection system 25 is in signal connection with the control terminal 14.
In the actual use process, before primary stirring and secondary stirring, the environments of the primary charging barrel 1 and the secondary charging barrel 7 are firstly adjusted into a drying environment controlled by the control terminal 14 in advance, so that the dryness (temperature and humidity) of the mixing environment is ensured; and before one-level stirring and second grade stirring, try on one-level rabbling mechanism 2 and second grade rabbling mechanism 8 earlier, when the trial run is errorless the back, reinforced again, guarantee that ultracapacitor system pole piece material can not appear the condition that needs to do over again because of the trouble of one-level rabbling mechanism 2 and second grade rabbling mechanism 8, and when the material mixes the back, do over again and can not reach the effect of mixing.
The supercapacitor pole piece material comprises activated carbon, carbon aerogel, carbon nanotubes, porous graphene, porous carbon black, porous carbon composite material, lithium iron phosphate, lithium cobaltate, lithium manganate and the like. In the material mixing, a conductive agent and a binder are needed to be scratched into the pole piece material of the supercapacitor, and the conductive agent and the binder comprise conductive carbon black, graphene, a PTFE aqueous solution with the mass content of 10% -20%, polyvinylidene fluoride (PVDF) with the mass content of 10% -30%, a polyvinyl alcohol NMP solution and the like.
Example two:
a dry mixing method of a pole piece material of a super capacitor is applied to the dry mixing device of the pole piece material of the super capacitor, and comprises the following steps:
starting the first-stage heating mechanism 3, acquiring the actual environment temperature in the first-stage charging barrel 1, and performing the next step when the actual environment temperature in the first-stage charging barrel 1 reaches the environment temperature of the first-stage charging barrel 1 set by the control terminal 14; it should be explained that the environmental temperature of the primary barrel 1 set by the control terminal 14 is greater than or equal to 40 ℃, and the humidity ranges from 5% to 20%, so as to ensure the environmental state during primary mixing, and the temperature and the humidity are both in ideal conditions. When each environmental parameter does not reach the set value of the control terminal 14, the temperature controller 23 operates to calculate the heating time and controls the operation of the primary heating mechanism 3 (the normal time is 2-5min), thereby ensuring that the internal environment of the primary charging barrel 1 is in a dry level.
Starting the primary stirring mechanism 2, judging whether the primary stirring mechanism 2 operates stably, and if so, entering the next step; this step is a trial operation of the primary mixing system, and in general, the operation speed of the primary stirring mechanism 2 is 2000rpm, the operation time is set to 30s, and it is observed whether the operation of the primary stirring mechanism 2 and the primary barrel 1 is stable.
After the first-level mixing system is tried out without errors, the first-level feeding hole 5 is opened, the first-level discharging hole 6 and the first valve 31 are closed, and the pole piece material (comprising the conductive agent and the binder) is added into the first-level charging barrel 1; the primary stirring mechanism 2 is used for primary stirring, generally, the speed interval of the primary stirring mechanism is controlled between 2000rpm and 5000 rpm; the primary particle size detector 4 collects the particle size data of the polar plate material in the primary charging barrel 1 for multiple times (generally 5-6 times), when the particle size is smaller than or equal to a first preset value set by the control terminal 14, the primary stirring mechanism 2 stops, and the particle size detection system 25 ensures that the primary particle size detector 4 operates without errors.
Opening a second valve 32 and a sixth valve 36, and operating a vacuum pump 13, wherein the vacuum pump 13 pumps the primary charging barrel 1 to a first preset air pressure state; specifically, the vacuum pump 13 pumps the primary feed cylinder 1 to < -0.8MPa (the conventional setting value is-1 to-0.8 MPa).
Then, opening the first-stage discharge port 6 and the first valve 31, and sucking the pole piece materials in the first-stage stirring mechanism 2 into the material storage barrel 30 under the action of air pressure difference; thereafter closing the second valve 32, the third valve 33 and the vacuum pump 13; in this operation the primary filter 17 performs a preliminary filtration of the powder.
Then, the secondary heating mechanism 9 is started, the actual environment temperature in the secondary charging barrel 7 is obtained, and when the actual environment temperature in the secondary charging barrel 7 reaches the environment temperature of the secondary charging barrel 7 set by the control terminal 14, the next step is carried out; it should be explained that the environmental temperature of the secondary material cylinder 7 set by the control terminal 14 is greater than or equal to 40 ℃ and the humidity is in the range of 5% to 20%, and similarly, in order to ensure the environmental state during the secondary mixing, the temperature and the humidity are both in ideal state. After the step, the secondary stirring mechanism 8 is subjected to test operation, that is: and (4) starting the second-stage stirring mechanism 8, judging whether the operation of the first-stage stirring mechanism 2 is stable, and if so, sucking the pole piece material into the second-stage charging barrel 7 from the material storage barrel 30.
Opening a fifth valve 35 and a sixth valve 36, and operating a vacuum pump 13, wherein the vacuum pump 13 pumps the secondary material cylinder 7 to a second preset air pressure state; similarly, the internal pressure of the secondary barrel 7 is pumped to < -0.8MPa (the conventional set value is-1 to-0.8 MPa).
Then, the fourth valve 34 is opened, and the pole piece material in the storage cylinder 30 is sucked into the secondary charging cylinder 7 under the action of air pressure difference; during this operation, the secondary filter 18 filters the powder a second time, after which the fifth valve 35, the sixth valve 36 and the vacuum pump 13 are closed.
The secondary stirring mechanism 8 is used for carrying out secondary stirring on the pole piece materials in the secondary charging barrel 7, the operating speed of a common secondary stirring mechanism is 0-3000 rpm, meanwhile, the rotating mechanism 16 at the bottom is started to rotate, the particle size data of the pole piece materials in the secondary charging barrel 7 are collected for multiple times (generally, 5-6 times) through the secondary particle size detector 10, and when the particle size is smaller than or equal to a second preset value set by the control terminal 14, the secondary stirring mechanism 8 is stopped;
and taking out the pole piece material subjected to secondary stirring from the secondary discharge hole 12 for manufacturing a pole piece.
The hybrid method is detailed in the following by specific different types of supercapacitor pole piece materials:
example three:
s1, opening the primary heating mechanism 4, detecting the relative humidity in the primary charging barrel 1 at the present stage, comparing the relative humidity with the parameters set by the control terminal 14 (the conventional set temperature is 40 ℃ and the humidity range is 20%), operating the temperature controller 23, calculating the heating time, controlling the primary heating mechanism 3 to operate for 4min, and ensuring that the internal environment of the primary charging barrel 1 is at a dry level;
s2, test run: turning on the motor 19, driving the first-stage stirring mechanism 2 to operate (at a speed of 2000rpm), setting the operation time to be 30s, and observing whether the operation of the first-stage charging barrel 1 and the first-stage stirring mechanism 2 is stable;
s3, opening the primary feed inlet 5, closing the primary discharge outlet 6 and the first valve 31 after the operation of S2 is correct, and adding 8kg of activated carbon, 1kg of conductive graphite and 1kg of 10% polyvinylidene fluoride (PVDF) into the primary charging barrel 1;
s4, turning on the motor 19, enabling the primary stirring mechanism 2 to operate at a running speed of 3000rpm, inputting running parameters by the control terminal 14, constantly detecting the particle size of the powder in the primary charging barrel 1 by the primary particle size detector 4 in the running process, repeatedly acquiring 5-6 times of particle size data, and controlling the motor 19 to stop running when the detected particle size is less than or equal to 15um, wherein the particle size detection system 25 ensures that the primary particle size detector 4 operates without errors;
s5, opening the second valve 32 and the third valve 33, operating the vacuum pump 13, pumping the internal pressure of the storage cylinder 30 to-0.8 Mpa, then opening the primary discharge port 6 and the first valve 31, sucking the powder primarily stirred in the primary material cylinder 1 into the storage cylinder 30 under the action of air pressure difference, closing the second valve 32, the third valve 33 and the vacuum pump 13 when the powder is completely sucked into the storage cylinder 30, and primarily filtering the powder by the primary filter 17 in the operation process;
s6, after the operation of step S5 is completed, the step similar to step S1 is executed, and the secondary heating mechanism 9 is operated to ensure that the internal environment of the secondary barrel 7 is at a dry level;
s7, opening the sixth valve 36, the fifth valve 35 and the vacuum pump 13, pumping the internal pressure of the secondary material cylinder 7 to-0.8 Mpa, opening the fourth valve 34, sucking the powder primarily filtered in the material storage cylinder 30 into the secondary material cylinder 7 under the action of air pressure difference, closing the sixth valve 36, the fifth valve 35 and the vacuum pump 13 when the powder is completely sucked, and performing secondary filtration on the powder by the secondary filter 18 in the operation process;
s8, turn on the magnetic stirring controller 20, drive the magnetic stirring piece through the magnetic transmission pole 21, the running parameter is 1000rpm, turn on the bottom rotary mechanism 16 running switch in the speed controller 22, the running speed is 600rpm, the concrete running parameter is input by the control terminal 14, the particle size of powder in the secondary feed cylinder 7 is detected by the secondary particle size detector 10 constantly in the running process, 5-6 times of particle size data are repeatedly collected, when the detected particle size is less than or equal to 5um, the proportion of various materials accords with the set standard value 8: 1: 1, stopping the magnetic stirring controller 20 and the bottom rotating mechanism 16;
and S9, taking out the stirred super capacitor pole piece material from the secondary discharge hole 12 after the operation is finished, and manufacturing the pole piece.
Example four:
when the adopted super-capacitor pole piece material is porous graphene, a carbon nano tube and a 15% PTF aqueous solution, the mixing process is as follows:
s1, opening the primary heating mechanism 4, detecting the relative humidity in the primary charging barrel 1 at the present stage, comparing the relative humidity with the parameters set by the control terminal 14 (the conventional set temperature is 45 ℃ and the humidity range is 15%), operating the temperature controller 23, calculating the heating time, controlling the primary heating mechanism 3 to operate for 3min, and ensuring that the internal environment of the primary charging barrel 1 is at a dry level;
s2, the same as the step of the third embodiment;
s3, opening the primary feed inlet 5, closing the primary discharge outlet 6 and the first valve 31 after the operation of S2 is correct, and adding 8kg of porous graphene, 200g of carbon nano tube and 1.8L of 15% PTFE aqueous solution into the primary charging barrel 1;
s4, turning on the motor 19, enabling the primary stirring mechanism 2 to operate at 4000rpm, inputting operation parameters by the control terminal 14, detecting the particle size of the powder in the primary charging barrel 1 by the primary particle size detector 4 in the operation process, repeatedly acquiring 5-6 times of particle size data, and controlling the motor 19 to stop operating when the detected particle size is less than or equal to 15um, wherein the particle size detection system 25 ensures that the primary particle size detector 4 operates without errors;
s5, S6, and S7 are the same as the steps of example three;
s8, turning on the magnetic stirring controller 20, driving the magnetic stirring piece through the magnetic transmission rod 21, wherein the operation parameter is 1500rpm, turning on the bottom rotating mechanism 16 operation switch in the speed controller 22, the operation speed is 700rpm, the specific operation parameter is input by the control terminal 14, the secondary particle size detector 10 detects the particle size of the powder in the secondary material cylinder 7 at any moment in the operation process, repeatedly collects 5-6 times of particle size data, and when the detected particle size is less than or equal to 4um, the proportion of various materials accords with a set standard value of 80: 2: 18, stopping the magnetic stirring controller 20 and the bottom rotating mechanism 16;
s9 is the same as the step in the third embodiment.
Example five:
when the adopted super capacitor pole piece material is a lithium iron phosphate/lithium cobaltate composite material, carbon fiber and 30% polyvinylidene fluoride (PVDF) are produced in a gas phase, the mixing process is as follows:
s1, opening the primary heating mechanism 4, detecting the relative humidity in the primary charging barrel 1 at the present stage, comparing the relative humidity with the parameters set by the control terminal 14 (the conventional set temperature is 50 ℃ and the humidity range is 10%), operating the temperature controller 23, calculating the heating time, controlling the primary heating mechanism 3 to operate for 3min, and ensuring that the internal environment of the primary charging barrel 1 is at a dry level;
s2, the same as the step of the third embodiment;
s3, after the operation is correct in S2, opening a first-level feeding hole 5, closing a first-level discharging hole 6 and a first valve 31, and adding 7kg of lithium iron phosphate/lithium cobaltate composite material, 300g of gas-phase production carbon fiber and 1.9L of 30% polyvinylidene fluoride (PVDF) into a first-level charging barrel 1;
s4, turning on the motor 19, enabling the primary stirring mechanism 2 to operate at 4500rpm, inputting operation parameters by the control terminal 14, detecting the particle size of the powder in the primary charging barrel 1 by the primary particle size detector 4 at any time in the operation process, repeatedly acquiring 5-6 times of particle size data, and controlling the motor 19 to stop operating when the detected particle size is less than or equal to 16 microns, wherein the particle size detection system 25 ensures that the primary particle size detector 4 operates without errors;
the steps S5, S6 and S7 are the same as those in the example, but the pressure of the primary charging barrel 1 and the pressure of the secondary charging barrel 7 are controlled to be-0.9 MPa;
s8, turning on the magnetic stirring controller 20, driving the magnetic stirring piece through the magnetic transmission rod 21, wherein the operation parameter is 1300rpm, turning on the bottom rotating mechanism 16 operation switch in the speed controller 22, the operation speed is 800rpm, the specific operation parameter is input by the control terminal 14, the secondary particle size detector 10 detects the particle size of the powder in the secondary material cylinder 7 at any moment in the operation process, repeatedly collects 5-6 times of particle size data, and when the detected particle size is less than or equal to 6um, the proportion of various materials accords with a set standard value 76: 4: 20, stopping the magnetic stirring controller 20 and the bottom rotating mechanism 16;
s9 is the same as the step in the third embodiment.
Example six:
when the adopted super-capacitor pole piece material is a carbon aerogel/lithium manganate composite material, graphene and a 17% styrene-butadiene rubber aqueous solution, the mixing process is as follows:
s1, opening the primary heating mechanism 4, detecting the relative humidity in the primary charging barrel 1 at the present stage, comparing the relative humidity with the parameters set by the control terminal 14 (the conventional set temperature is 50 ℃ and the humidity range is 15%), operating the temperature controller 23, calculating the heating time, controlling the primary heating mechanism 3 to operate for 5min, and ensuring that the internal environment of the primary charging barrel 1 is at a dry level;
s2, the same as the step of the third embodiment;
s3, opening a first-stage feeding hole 5, closing a first-stage discharging hole 6 and a first valve 31 after the operation is correct at S2, and adding 9kg of carbon aerogel/lithium manganate composite material, 400g of graphene and 2.4L of 17% styrene-butadiene rubber aqueous solution into a first-stage charging barrel 1;
s4, turning on the motor 19, enabling the primary stirring mechanism 2 to operate at 4800rpm, inputting operation parameters by the control terminal 14, detecting the particle size of the powder in the primary charging barrel 1 by the primary particle size detector 4 in the operation process, repeatedly acquiring 5-6 times of particle size data, and controlling the motor 19 to stop operating when the detected particle size is less than or equal to 17um, wherein the particle size detection system 25 ensures that the primary particle size detector 4 operates without errors;
the steps S5, S6 and S7 are the same as those in the example, but the pressure of the primary charging barrel 1 and the pressure of the secondary charging barrel 7 are controlled to be-0.9 MPa;
s8, turning on the magnetic stirring controller 20, driving the magnetic stirring piece through the magnetic transmission rod 21, wherein the operation parameter is 1800rpm, turning on the bottom rotating mechanism 16 operation switch in the speed controller 22, the operation speed is 750rpm, the specific operation parameter is input by the control terminal 14, the secondary particle size detector 10 detects the particle size of the powder in the secondary material cylinder 7 at any moment in the operation process, repeatedly collects 5-6 times of particle size data, and when the detected particle size is less than or equal to 5um, the proportion of various materials accords with the set standard value of 75: 5: 20, stopping the magnetic stirring controller 20 and the bottom rotating mechanism 16;
s9 is the same as the step in the third embodiment.
In this scheme, this dry process mixing arrangement of ultracapacitor system pole piece material's mixing efficiency is high, the misce bene, and it is effectual to mix, but serialization production.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A dry mixing device for a pole piece material of a super capacitor is characterized by comprising:
the storage barrel is provided with a feeding pipe and a discharging pipe;
the primary mixing system comprises a primary charging barrel, and a primary stirring mechanism, a primary heating mechanism and a primary granularity detector which are all arranged in the primary charging barrel, wherein the primary stirring mechanism is used for stirring materials in the primary charging barrel; the primary heating mechanism is used for heating the primary charging barrel; the primary particle size detector is used for detecting the particle size of the material in the primary charging barrel; the primary charging barrel is provided with a primary charging hole and a primary discharging hole, and the primary discharging hole is communicated with the charging pipe through a first connecting pipe;
the secondary mixing system comprises a secondary charging barrel, and a secondary stirring mechanism, a secondary heating mechanism and a secondary particle size detector which are all arranged in the secondary charging barrel, wherein the secondary stirring mechanism is used for stirring materials in the secondary charging barrel; the secondary heating mechanism is used for heating the secondary charging barrel; the secondary particle size detector is used for detecting the particle size of the material in the secondary charging barrel; a second-stage feeding hole and a second-stage discharging hole are formed in the second-stage charging barrel, and the second-stage feeding hole is communicated with the discharging pipe through a second connecting pipe;
the vacuum pump is used for pumping the storage pump and the secondary charging barrel into a low-pressure or vacuum state, a first air pumping pipe and a second air pumping pipe are arranged on the vacuum pump, the first air pumping pipe is communicated with the feeding pipe, and the second air pumping pipe is communicated with the second connecting pipe; a first valve is arranged on the first connecting pipe, a second valve is arranged on the feeding pipe, a third valve is arranged on the first air exhaust pipe, a fourth valve is arranged on the discharging pipe, a fifth valve is arranged on the second connecting pipe, and a sixth valve is arranged on the second air exhaust pipe;
and the control terminal is used for controlling the primary granularity detector, the secondary granularity detector, the primary heating mechanism and the secondary heating mechanism.
2. The dry mixing device for the pole piece material of the supercapacitor according to claim 1, further comprising an outer box, wherein a rotating mechanism for driving the secondary material cylinder to rotate is further arranged at the bottom of the secondary material cylinder, and the secondary material cylinder and the rotating mechanism are both arranged in the outer box;
the first-stage stirring mechanism and the second-stage stirring mechanism can rotate, and the rotating direction of the rotating mechanism is opposite to that of the second-stage stirring mechanism.
3. The dry mixing device for the pole piece materials of the supercapacitor according to claim 2, further comprising a speed controller in signal connection with the control terminal, wherein the speed controller is used for controlling the speed of the bottom rotating mechanism, the secondary stirring mechanism and the secondary charging barrel.
4. The dry mixing device for the pole piece material of the supercapacitor according to claim 1, wherein a primary filter is arranged on the feeding pipe, and a secondary filter is arranged on the discharging pipe.
5. The dry mixing device for the pole piece material of the supercapacitor according to claim 3, further comprising a temperature controller, a motor controller and a particle size detection system, wherein the temperature controller is used for controlling the temperature of the primary heating mechanism and the secondary heating mechanism, and the temperature controller is in signal connection with the control terminal;
the primary stirring mechanism comprises a motor, the motor controller is used for controlling the motor, and the motor controller is in signal connection with the control terminal;
the granularity detection system is used for controlling the primary granularity detector and the secondary granularity detector and is in signal connection with the control terminal.
6. The dry mixing device for the pole piece material of the supercapacitor according to claim 1, wherein the secondary stirring mechanism comprises a magnetic stirring controller, a magnetic transmission rod and a stirring piece which are arranged from top to bottom in sequence.
7. A dry mixing method of a pole piece material of a super capacitor is applied to the dry mixing device of the pole piece material of the super capacitor as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps:
starting a first-stage heating mechanism, acquiring the actual environmental temperature in the first-stage charging barrel, and performing the next step when the actual environmental temperature in the first-stage charging barrel reaches the first-stage charging barrel environmental temperature set by the control terminal;
starting the primary stirring mechanism, judging whether the primary stirring mechanism is stable in operation, and if so, entering the next step;
opening a first-stage feeding hole, closing a first-stage discharging hole and a first valve, and adding a pole piece material into a first-stage charging barrel; the primary stirring mechanism is used for carrying out primary stirring on the mixture; the primary particle size detector collects particle size data of the polar plate material in the primary charging barrel for multiple times, and when the particle size of the polar plate material is smaller than or equal to a first preset value set by the control terminal, the primary stirring mechanism stops;
opening a second valve and a sixth valve, and operating a vacuum pump, wherein the vacuum pump pumps the primary charging barrel to a first preset air pressure state;
opening a first-stage discharge port and a first valve, and sucking the pole piece materials in the first-stage stirring mechanism into a material storage barrel under the action of air pressure difference; then closing the second valve, the third valve and the vacuum pump;
starting a secondary heating mechanism, acquiring the actual environment temperature in the secondary charging barrel, and performing the next step when the actual environment temperature in the secondary charging barrel reaches the secondary charging barrel environment temperature set by the control terminal;
opening a fifth valve and a sixth valve, and operating a vacuum pump, wherein the vacuum pump pumps the secondary charging barrel to a second preset air pressure state;
opening a fourth valve, and sucking the pole piece materials in the material storage cylinder into the secondary charging cylinder under the action of air pressure difference; then closing the fifth valve, the sixth valve and the vacuum pump;
the secondary stirring mechanism is used for carrying out secondary stirring on the pole piece materials in the secondary charging barrel, the secondary granularity detector is used for collecting granularity data of the pole piece materials in the secondary charging barrel for multiple times, and when the grain diameter of the pole piece materials is smaller than or equal to a second preset value set by the control terminal, the secondary stirring mechanism is stopped;
and taking out the pole piece material subjected to secondary stirring from the secondary discharge hole.
8. The dry mixing method for the pole piece material of the supercapacitor according to claim 7, wherein the ambient temperature of the primary barrel set by the control terminal is greater than or equal to 40 ℃, and the humidity range is between 5% and 20%;
the environmental temperature of the secondary charging barrel set by the control terminal is more than or equal to 40 ℃, and the humidity range is between 5% and 20%.
9. The dry mixing method for the pole piece materials of the supercapacitor according to claim 7, wherein before the pole piece materials are sucked into the secondary charging barrel from the storage barrel, the secondary stirring mechanism is subjected to test operation:
and starting the second-stage stirring mechanism, judging whether the first-stage stirring mechanism operates stably, and if so, sucking the pole piece material into the second-stage charging barrel from the storage barrel.
10. The dry mixing method for the pole piece material of the supercapacitor according to claim 7, wherein the pole piece material comprises activated carbon, and/or carbon aerogel, and/or carbon nanotubes, and/or porous graphene, and/or porous carbon black, and/or porous carbon composite material, and/or lithium iron phosphate, and/or lithium cobaltate, and/or lithium manganate.
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| CN212974956U (en) * | 2020-05-22 | 2021-04-16 | 信阳深博电子科技有限公司 | Super capacitor material preparation facilities |
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| US20060249605A1 (en) * | 2003-10-23 | 2006-11-09 | Masahiko Hiraki | Method and apparatus for dispersing pigment in liquid medium |
| US20170348657A1 (en) * | 2015-01-20 | 2017-12-07 | Halliburton Energy Services, Inc. | Dry Powder Blending |
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