CN217795551U - Electrolyte preparation system - Google Patents
Electrolyte preparation system Download PDFInfo
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- CN217795551U CN217795551U CN202120782570.6U CN202120782570U CN217795551U CN 217795551 U CN217795551 U CN 217795551U CN 202120782570 U CN202120782570 U CN 202120782570U CN 217795551 U CN217795551 U CN 217795551U
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Abstract
The utility model relates to an electrolyte preparation system, which comprises at least one raw material processing part and a stirring tank connected with the raw material processing part, wherein each raw material processing part comprises a first solvent tank, a first solvent storage tank and a first molecular sieve column; one end of the first solvent tank is connected with a solvent source, and the other end of the first solvent tank is communicated with the first solvent storage tank; the outlet end of the first solvent storage tank is respectively connected with the inlet end of the first molecular sieve column and the inlet end of the stirring tank; the outlet end of the first molecular sieve column is connected with the inlet end of the first solvent storage tank. The utility model provides a novel electrolyte preparation system in this system, has added first molecular sieve post to make its and first solvent jar, first solvent source and first solvent storage tank etc. with specific connected mode, make that first molecular sieve post can be better carry out processing such as dewatering to the solvent, then this system is not strict to the requirement of electrolyte raw materials, and the raw materials expense is low.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to electrolyte preparation system.
Background
The secondary battery is a battery which is widely applied at present and can be repeatedly charged and discharged, and the application of the secondary battery relates to a plurality of fields. The secondary battery includes various types such as button cells, cylindrical cells, pouch cells, and prismatic cells, and is currently most widely used as a lithium ion battery.
However, in the current process for preparing the battery electrolyte, there is no step of further processing the raw materials, and basically, commercially available raw materials are added directly in a stirring tank in order and then stirred. Although the method is simple, the applicant finds that the electrolyte prepared by the method has defects or defects with unstable effect in the research process. Through further research, the main reason is that the standards such as the water content in the raw materials are not consistent. While conventional commercially available common raw materials, such as organic solvents, have water contents varying from 20 to 100ppm, different water contents have different effects on battery performance. If organic solvents with strictly low water content are purchased, the cost is high, and since the solvent is not stored completely without air, etc., many of them cannot reach the required content of the electrolyte even if the seller claims low water content. These unstable factors cause unstable battery performance, and the operation requirements for the electrolyte preparation process are strict, so the preparation difficulty is increased.
Based on the consideration of the above prior art condition, the utility model designs a one set of neotype preparation process flow system, it can be handled the raw materials at the preparation in-process, and it has reduced the requirement to the raw materials, and has also promoted the comprehensive properties of battery.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electrolyte preparation system to prior art's defect, it has overcome some not enough among the prior art.
The utility model aims at realizing through the following technical scheme:
one aspect of the present invention is to provide an electrolyte preparation system, which includes at least one raw material processing portion and a stirring tank connected to the raw material processing portion, wherein each raw material processing portion includes a first solvent tank, a first solvent storage tank, and a first molecular sieve column; one end of the first solvent tank is connected with a solvent source so that a solvent enters the first solvent tank after coming, and the other end of the first solvent tank is communicated with the first solvent storage tank so that the solvent enters the first solvent storage tank; the outlet end of the first solvent storage tank is respectively connected with the inlet end of the first molecular sieve column and the inlet end of the stirring tank so that the solvent in the first solvent storage tank can selectively enter the first molecular sieve column or the stirring tank; the outlet end of the first molecular sieve column is connected with the inlet end of the first solvent storage tank so that the solvent passing through the first molecular sieve column enters the first solvent storage tank again. And the stirring tank is connected with a liquid injection machine so that the prepared electrolyte enters the liquid injection machine for standby.
Further, a feed inlet is formed in the stirring tank and connected with the glove box, so that feeding can be carried out in the glove box.
Further, the system also includes at least one solvent treatment tank, at least one storage tank, and at least one molecular sieve treatment column; the outlet end of the solvent treatment tank is respectively connected with the inlet end of the molecular sieve treatment column and the inlet end of the storage tank so that the solvent or solution in the solvent treatment tank can selectively enter the molecular sieve treatment column or the storage tank; the outlet end of the molecular sieve treatment column is connected with the inlet end of the solvent treatment tank so that the solvent or solution passing through the molecular sieve treatment column enters the solvent treatment tank again; the outlet end of the storage tank is connected with the inlet end of the stirring tank so that the solution in the storage tank flows into the stirring tank.
Further, the first solvent tank, the stirring tank, the first molecular sieve column and the molecular sieve treatment column are all independently connected with a protective gas source for placing protective gas, and the protective gas source can be a protective gas tank and the like.
Furthermore, the first solvent storage tank, the solvent treatment tank, the storage tank and the stirring tank are all independently connected with a vacuum pumping pump. The first solvent tank, the first molecular sieve column, the molecular sieve treatment column and the stirring tank are respectively connected with a protective gas source through a pipeline A, a pipeline E, a pipeline K and a pipeline I.
Further, the first solvent tank is connected with the first solvent storage tank through a pipeline B; the outlet end of the first solvent storage tank is connected with the inlet end of the first molecular sieve column through a pipeline D; the outlet end of the first molecular sieve column is connected with the inlet end of a first solvent storage tank through a pipeline F; the outlet end of the first solvent storage tank is connected with the inlet end of the stirring tank through a pipeline G; the outlet end of the solvent treatment tank is connected with the inlet end of the molecular sieve treatment column through a pipeline J; the outlet end of the molecular sieve treatment column is connected with the inlet end of the solvent treatment tank through a pipeline L; the outlet end of the solvent treatment tank is connected with the inlet end of the storage tank through a pipeline M; the outlet end of the storage tank is connected with the inlet end of the stirring tank through a pipeline N; the outlet end of the stirring tank is connected with the inlet end of the solvent treatment tank through a pipeline Q.
Furthermore, the pipeline A, the pipeline H and the pipeline I are respectively and independently connected with a one-way valve and a flowmeter, and the other pipelines are respectively provided with corresponding valves or one-way valves; a weighing device is arranged on the first solvent storage tank; a first magnetic pump and a first three-way valve are arranged between the outlet end of the first solvent storage tank and the first molecular sieve column and the stirring tank and are used for conveying the solution or the solvent to the first molecular sieve column or the stirring tank; a second magnetic pump and a second three-way valve are arranged between the outlet end of the solvent treatment tank and the molecular sieve treatment column or the storage tank and are used for conveying the solution or the solvent to the molecular sieve treatment column or the storage tank; a third magnetic pump is arranged between the storage tank and the stirring tank.
The utility model discloses the main beneficial effect who has does:
the utility model provides a novel electrolyte preparation system in this system, has added first molecular sieve post to make first molecular sieve post and first solvent jar, first solvent source and first solvent storage tank etc. with specific connected mode, make that first molecular sieve post can be better carry out processing such as dewatering to the solvent, make this system not strict to the requirement of electrolyte raw materials, the raw materials is with low costs.
In addition, a solvent treatment tank, a storage tank, a molecular sieve treatment column and the like can be added into the system, and through a specific connection mode, the solution coming out of the stirring tank can also pass through the molecular sieve treatment column, so that the solution and the like can be subjected to dewatering, impurity removal, catalysis or other treatment, and the effect is better.
And this application still carries out the special design through certain pipeline, evacuation pump, protective gas source, magnetic drive pump, three-way valve, flowmeter etc. and reaction process automation degree is higher, and the result of use is better.
Drawings
Fig. 1 is a schematic view of an electrolyte preparation system according to embodiment 1 of the present application.
Fig. 2 is a schematic view of an electrolyte preparation system according to embodiment 2 of the present application.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be described clearly and completely with reference to the specific embodiments of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
An electrolyte preparation system, as shown in fig. 1, comprises at least one raw material treatment section and a stirring tank 1 connected with the raw material treatment section, each of the raw material treatment sections comprising a first solvent tank 10, a first solvent storage tank 4 and a first molecular sieve column 5.
One end of the first solvent tank 10 is connected with a solvent source so that the solvent enters the first solvent tank 10 after being fed, and the other end of the first solvent tank is communicated with the first solvent storage tank 4 so that the solvent enters the first solvent storage tank 4. The outlet end of the first solvent storage tank 4 is connected with the inlet end of the first molecular sieve column 5 and the inlet end of the stirring tank 1 respectively so that the solvent in the first solvent storage tank can selectively enter the first molecular sieve column 5 or the stirring tank 1. The outlet end of the first molecular sieve column 5 is connected with the inlet end of the first solvent storage tank 4 so that the solvent passing through the first molecular sieve column 5 enters the first solvent storage tank 4 again. And the stirring tank 1 is connected with a liquid injection machine so that the prepared electrolyte enters the liquid injection machine for standby.
If there are two raw material treatment sections, it may further include a second solvent tank (corresponding to the first solvent tank 10), a second solvent storage tank (corresponding to the second solvent storage tank), and a second molecular sieve column (corresponding to the second molecular sieve column). One end of the second solvent tank is connected with a solvent source so that the solvent enters the second solvent tank after coming, and the other end of the second solvent tank is communicated with the second solvent storage tank so that the solvent enters the second solvent storage tank; the outlet end of the second solvent storage tank is respectively connected with the inlet end of the second molecular sieve column and the inlet end of the stirring tank 1 so that the solvent in the second solvent storage tank can selectively enter the second molecular sieve column or the stirring tank 1; the outlet end of the second molecular sieve column is connected with the inlet end of the second solvent storage tank so that the solvent passing through the second molecular sieve column enters the second solvent storage tank again. Similarly, if the number of the raw material processing parts is three, the device also comprises a third solvent tank, a third solvent storage tank and a third molecular sieve column; one end of the third solvent tank is connected with a solvent source so that a solvent enters the third solvent tank after being fed, and the other end of the third solvent tank is communicated with the third solvent storage tank so that the solvent enters the third solvent storage tank; the outlet end of the third solvent storage tank is respectively connected with the inlet end of the third molecular sieve column and the inlet end of the stirring tank 1 so that the solvent in the third solvent storage tank can selectively enter the third molecular sieve column or the stirring tank 1; and the outlet end of the third molecular sieve column is connected with the inlet end of the third solvent storage tank so that the solvent passing through the third molecular sieve column enters the third solvent storage tank again. The solvent source is a device for placing the solvent, such as a solvent barrel and the like.
In a preferred embodiment, the stirring tank 1 is provided with a feeding port, and the feeding port is connected with the glove box 9, so that the feeding is performed in the glove box 9, and lithium salt, additive components, auxiliary agents and the like can be fed from the glove box 9.
In a preferred embodiment, the first solvent tank 10, the stirring tank 1 and the first molecular sieve column 5 are all independently connected with a shielding gas source 7 for placing shielding gas, wherein the shielding gas can be nitrogen, argon or the like, and the shielding gas source can be a shielding gas tank or the like.
In a preferred embodiment, the first solvent storage tank 4 and the agitation tank 1 are each independently connected to a vacuum pump or set of vacuum pumps 8. Preferably, the first solvent storage tank 4 and the stirring tank 1 are connected with a vacuum pump or a vacuum pump set 8 through a pipeline C and a pipeline H respectively.
In a preferred embodiment, the first solvent tank 10, the first molecular sieve column 5 and the stirring tank 1 are respectively connected with a protective gas source through a pipeline a, a pipeline E and a pipeline I. The solvent or solution in the first solvent tank 10, the first molecular sieve column 5 and the stirring tank 1 is conveyed to the next step by the pressure of the protective gas.
In a preferred embodiment, the first solvent tank 10 is connected with the first solvent storage tank 4 through a pipeline B; the outlet end of the first solvent storage tank is connected with the inlet end of the first molecular sieve column 5 through a pipeline D; the outlet end of the first molecular sieve column 5 is connected with the inlet end of a first solvent storage tank through a pipeline F; the outlet end of the first solvent storage tank is connected with the inlet end of the stirring tank 1 through a pipeline G.
In a preferred embodiment, the pipeline a, the pipeline H and the pipeline I are respectively and independently provided with a one-way valve and a flowmeter.
In a preferred embodiment, the first solvent storage tank is provided with a weighing device, which can weigh a weighbridge, and the weighing device can be arranged below the first solvent storage tank, so that the weighbridge can be weighed after the raw material or the solvent is supplied.
A first magnetic pump and a first three-way valve are arranged between the outlet end of the first solvent storage tank and the first molecular sieve column 5 and the stirring tank 1, and are used for conveying the solution or the solvent to the first molecular sieve column 5 or the stirring tank 1.
In a preferred embodiment, temperature measuring probes for measuring temperature are further disposed on the stirring tank and the first solvent storage tank.
In a preferred embodiment, the first molecular sieve column 5 may contain molecular sieves, including 4A molecular sieves, 3A molecular sieves, 5A molecular sieves, 10Z molecular sieves, 13Z molecular sieves, Y-type molecular sieves, MCM molecular sieves or ZSM molecular sieves. Of course, modified molecular sieves equipped with these molecular sieves described above, such as modified 4A molecular sieve, modified 3A molecular sieve, modified 5A molecular sieve, modified 10Z molecular sieve, modified 13Z molecular sieve, modified Y-type molecular sieve, modified MCM molecular sieve or modified ZSM molecular sieve, may also be used. In the specific implementation, the molecular sieve or the modified molecular sieve can be selected from the commercially available molecular sieve, and the molecular sieve can be prepared by itself.
In the specific limitations of this embodiment, other raw material processing portions, that is, the second solvent tank, and the second molecular sieve column, or the third solvent tank, and the third molecular sieve column, etc., are not explicitly described, and of course, a fourth solvent tank, and a fourth molecular sieve column, etc. may also be included. In addition, if a single solvent electrolyte is used, only one raw material processing unit is generally required.
Example 2
On the basis of example 1, as shown in fig. 2, the electrolyte preparation system further includes at least one solvent treatment tank 3, at least one storage tank 2, and at least one molecular sieve treatment column 6.
The outlet end of the solvent treatment tank 3 is respectively connected with the inlet end of the molecular sieve treatment column 6 and the inlet end of the storage tank 2 so that the solvent or solution in the solvent treatment tank can selectively enter the molecular sieve treatment column 6 or the storage tank 2.
The outlet end of the molecular sieve treatment column 6 is connected with the inlet end of the solvent treatment tank 3 so that the solvent or solution passing through the molecular sieve treatment column 6 enters the solvent treatment tank 3 again; the molecular sieve treatment column 6 is filled with a molecular sieve, and the type of the molecular sieve is the same as the type defined in the first molecular sieve column 5 in example 1, namely the molecular sieve can be a common commercially available molecular sieve, a commercially available modified molecular sieve, a molecular sieve specially prepared by the molecular sieve, and the like.
The outlet end of the storage tank 2 is connected with the inlet end of the stirring tank 1 so that the solution in the storage tank flows into the stirring tank 1.
In a preferred embodiment, the molecular sieve treatment column 6 is connected to a shielding gas source for placing a shielding gas. The solvent or solution in the second molecular sieve column is transported to the next step by the pressure of the protective gas.
In a preferred embodiment, the solvent treatment tank 3 and the storage tank 2 are each independently connected to a vacuum pump or set of vacuum pumps 8. Preferably, the solvent treatment tank 3 and the storage tank 2 are respectively connected with a vacuum pump or a vacuum pump set 8 through a pipeline O and a pipeline P.
In a preferred embodiment, the molecular sieve treatment column 6 is connected to a shielding gas source 7 via a conduit K.
In a preferred embodiment, the outlet end of the solvent treatment tank 3 is connected with the inlet end of the molecular sieve treatment column 6 through a pipeline J; the outlet end of the molecular sieve treatment column 6 is connected with the inlet end of the solvent treatment tank 3 through a pipeline L; the outlet end of the solvent treatment tank 3 is connected with the inlet end of the storage tank 2 through a pipeline M.
The outlet end of the storage tank 2 is connected with the inlet end of the stirring tank 1 through a pipeline N; the outlet end of the stirring tank 1 is connected with the inlet end of the solvent treatment tank 3 through a pipeline Q.
In a preferred embodiment, a second magnetic pump and a second three-way valve are arranged between the outlet end of the solvent treatment tank 3 and the molecular sieve treatment column 6 and the storage tank 2, and are used for conveying the solution or the solvent to the molecular sieve treatment column 6 or the storage tank 2;
a third magnetic pump is arranged between the storage tank 2 and the stirring tank.
In addition, each pipeline is provided with a valve.
In a preferred embodiment, the solvent treatment tank is further provided with a temperature probe for temperature measurement.
In this embodiment, a novel system is provided, in which the first molecular sieve column 5 and the molecular sieve treatment column 6 are added, the first molecular sieve column 5 and the molecular sieve treatment column 6 can remove water and other treatment from the solvent, and can perform certain treatment on additives or auxiliaries in the electrolyte, so that the prepared electrolyte has a better effect.
Example 3
On the basis of the embodiment 1, the use method of the electrolyte preparation system comprises the following steps:
(1) Solvent entering the first solvent tank 10: the organic solvent at the solvent source enters the first solvent tank 10;
(2) The solvent enters a first solvent storage tank 4 from a first solvent tank 10: opening a nitrogen gas valve, enabling high-purity nitrogen gas flow to enter a first solvent tank 10 through a pipeline A, installing a one-way valve and a flowmeter on the pipeline A, enabling the gas flow pressure to be 0-0.6 MPa, and conveying the organic solvent to a first solvent storage tank 4 through a pipeline B and a valve by using the nitrogen gas pressure;
simultaneously opening a valve, vacuumizing the first solvent storage tank 4 through a pipeline C, configuring a weighing wagon balance for the first solvent storage tank 4, and weighing the solvent through the wagon balance;
(3) Treatment of the first molecular sieve column 5: opening a valve at the bottom of a first solvent storage tank 4, conveying the organic solvent in the first solvent storage tank 4 into a first molecular sieve column 5 through a three-way valve and a pipeline D by a magnetic pump, introducing high-purity nitrogen flow through a pipeline E and the valve, allowing the organic solvent to flow through the first molecular sieve column 5 from bottom to top under the action of the nitrogen flow to remove moisture, and returning the organic solvent to the first solvent storage tank 4 through a pipeline F and the valve to finish one-time water removal operation; the valve at the bottom of the first solvent storage tank 4 can be used for taking the organic solvent 1 in the first solvent storage tank 4 to detect the water content of the organic solvent.
(4) Entering the stirring tank 1 from a first solvent storage tank 4: the organic solvent in the step (3) can be circulated in the first molecular sieve column 5 for a plurality of times to remove water, and when the moisture content of the solvent is reduced to a specified value (for example, <15 ppm), the three-way valve is adjusted to enable the organic solvent in the first solvent storage tank 4 to be conveyed to the operation end of the stirring tank 1 through the valve, the magnetic pump, the three-way valve and the pipeline G, and then the organic solvent is injected into the stirring tank 1 through the valve.
(5) Adding an auxiliary raw material into a solvent, and conveying the solvent to a solvent treatment tank 3: after the organic solvent is injected into the stirring tank 1, the raw materials (such as additives and/or lithium salt and the like) except the organic solvent in the electrolyte are fed into the stirring tank 1 by an operator in a glove box 9 through a feed inlet shutoff valve in proportion to be mixed with the solvent and stirred, and the rotating speed is as follows: 0-100rpm, paddle type: anchor formula oar + impulse type, the material: SS304, obtaining a solution.
And after stirring is finished, obtaining electrolyte, injecting high-purity argon into the stirring tank 1 through a pipeline I, opening a one-way valve at the bottom of the stirring tank 1, and conveying the solution to a liquid injection machine through nitrogen pressure for later use.
Example 4
On the basis of embodiment 2, a method for using an electrolyte preparation system comprises the following steps:
(1) Solvent entering the first solvent tank 10: the organic solvent at the solvent source enters the first solvent tank 10;
(2) The solvent enters the first solvent storage tank 4 from the first solvent tank 10: opening a nitrogen gas valve, enabling high-purity nitrogen gas flow to enter a first solvent tank 10 through a pipeline A, installing a one-way valve and a flowmeter on the pipeline A, enabling the gas flow pressure to be 0-0.6 MPa, and conveying the organic solvent to a first solvent storage tank 4 through a pipeline B and a valve by using the nitrogen gas pressure;
simultaneously opening a valve, vacuumizing the first solvent storage tank 4 through a pipeline C, configuring a weighing wagon balance for the first solvent storage tank 4, and weighing the solvent through the wagon balance;
(3) First molecular sieve column 5 treatment: opening a valve at the bottom of a first solvent storage tank 4, conveying the organic solvent in the first solvent storage tank 4 to a first molecular sieve column 5 through a three-way valve and a pipeline D by a magnetic pump, introducing high-purity nitrogen flow through a pipeline E and the valve, allowing the organic solvent to flow through the first molecular sieve column 5 from bottom to top under the action of the nitrogen flow, removing moisture, and returning to the first solvent storage tank 4 through a pipeline F and the valve to finish primary water removal operation; the valve at the bottom of the first solvent storage tank 4 can be used for taking the organic solvent 1 in the first solvent storage tank 4 to detect the water content of the organic solvent.
(4) Entering the stirring tank 1 from a first solvent storage tank 4: the organic solvent in the step (3) can be circularly removed in the first molecular sieve column 5 for a plurality of times, and when the moisture content of the solvent is reduced to a specified value (such as <15 ppm), the three-way valve is adjusted, so that the organic solvent in the first solvent storage tank 4 is conveyed to the operation end of the stirring tank 1 through the valve, the magnetic pump, the three-way valve and the pipeline G, and is injected into the stirring tank 1 through the valve.
(5) Adding an auxiliary raw material into a solvent, and conveying the solvent to a solvent treatment tank 3: after the organic solvent is injected into the stirring tank 1, an operator feeds certain or several raw materials (such as additives) in the electrolyte into the stirring tank 1 through a feed inlet shutoff valve in proportion in a glove box 9, and the mixture is mixed and stirred with the solvent at the rotating speed: 0-100rpm, paddle type: anchor oar + impulse type, the material: SS304 to obtain a solution.
After stirring, high-purity argon is injected into the stirring tank 1 through the pipeline I, a one-way valve at the bottom of the stirring tank 1 is opened, and the solution is transferred into the solvent treatment tank 3 through the pipeline Q by nitrogen pressure. The stirring tank 1 is provided with a temperature control system, the temperature of materials in the tank can be monitored in real time, the stirring tank 1 is provided with a jacket, cold water and hot water or other freezing media can be introduced, and the pressure resistance of the jacket is 0.4MPa.
(6) Treating in a molecular sieve treating column 6: before the solution enters the solvent treatment tank 3, the solvent treatment tank 3 is vacuumized by a pipe O. After the solution enters, a valve at the bottom of the solvent treatment tank 3 is opened, the solution in the solvent treatment tank 3 is conveyed to the molecular sieve treatment column 6 through a three-way valve and a pipeline J by a magnetic pump, meanwhile, high-purity nitrogen flow is introduced through a pipeline K and the valve, the solution flows through the molecular sieve treatment column 6 from bottom to top under the action of the nitrogen flow, and then the solution returns to the solvent treatment tank 3 through a pipeline L and the valve.
(7) Entering the storage tank 2 from the solvent treatment tank 3: before the solution enters the storage tank 2, the storage tank 2 is vacuumized through a pipeline P; the three-way valve is then adjusted so that the solution in the solvent treatment tank 3 is delivered to the holding tank 2 through the valve, the magnetic pump, the three-way valve and the pipe M.
(8) Conveyed from the storage tank 2 to the stirring tank 1: the one-way valve at the bottom of the storage tank 2 is opened, so that the solution in the storage tank 2 is conveyed to the stirring tank 1 through the valve, the magnetic pump and the pipeline N.
(9) Adding materials and stirring to finish preparation: before the solution is injected into the stirring tank 1, the stirring tank 1 is first vacuumized through the pipe H. After the solution is injected, the other components (such as lithium salt) to be added into the electrolyte are fed into the stirring tank 1 by an operator in the glove box 9 through the feed inlet shutoff valve in proportion and mixed with the solution, and the rotation speed is as follows: 0-100rpm, paddle type: anchor oar + impulse type, the material: and an SS304. After stirring, inject high-purity argon gas into agitator tank 1 by pipeline I to open the check valve of agitator tank 1 bottom, shift electrolyte to annotating in the liquid machine through nitrogen pressure. The stirring tank 1 is provided with a temperature control system, the temperature of materials in the tank can be monitored in real time, the stirring tank 1 is provided with a jacket, cold water and hot water or other freezing media can be introduced, and the pressure resistance of the jacket is 0.4MPa.
In a preferred embodiment, the molecular sieve in first molecular sieve column 5 is a commercially available conventional molecular sieve, as described in example 1. The molecular sieve in the molecular sieve treatment column 6 is a modified molecular sieve, such as described in example 1 or 2, and is not described herein again.
In step (4), can get the organic solvent in the material solvent storage tank 4 to detect its water content, if the water content is many, can circulate the dewatering many times in first molecular sieve post 5, after the moisture content of solvent reduces to the specified value (< 15 ppm). After passing through molecular sieve treatment column 6, further water removal is also possible, typically to <10ppm.
In a preferred embodiment, during the preparation of the electrolyte, the vacuum degree of the first solvent storage tank, the solvent treatment tank, the storage tank and the stirring tank is 0-50 KPa. .
Electrolyte moisture that this embodiment prepared is less than or equal to 10ppm, the utility model discloses an organic solvent has adopted the molecular sieve to handle, consequently, the requirement of this application to raw materials water content is low, so the purchase of raw materials is not strict, the raw materials of optional low price.
In the present invention, the components of the electrolyte can be selected according to actual requirements, and the organic solvent can be dimethyl carbonate, ethyl methyl carbonate, ethyl acetate, methyl propionate, ethyl propionate, etc. The additive can be fluoroethylene carbonate (FEC), carbonVinylene acetate (VC), tetramethylborate (TMB), trimethyl Borate (TB), tris (trimethylsilane) borate (TMSB), trimethylcyclotriboroxane, or the like. The lithium salt may be lithium hexafluorophosphate LiPF 6 Lithium tetrafluoroborate (LiBF) 4 Lithium bis (oxalato) borate LiBOB, lithium difluorophosphate LiDFP, lithium difluorooxalato borate LiDFOB or LiODFB, lithium difluorooxalato phosphate LiDFOP, lithium tetrafluorooxalato phosphate LiTFOP, lithium tris (oxalato) phosphate LiTOP, lithium bis (trifluoromethylsulfonyl) imide LiTFSI, lithium bis (fluorosulfonyl) imide LiFSI, lithium carbonate Li 2 CO 3 Or lithium fluoride LiF, etc. Since the electrolyte and the components of the electrolyte are not within the scope of the present application, further description is omitted
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (10)
1. An electrolyte preparation system, its characterized in that: the system comprises at least one raw material processing part and a stirring tank connected with the raw material processing part, wherein each raw material processing part comprises a first solvent tank, a first solvent storage tank and a first molecular sieve column;
one end of the first solvent tank is connected with a solvent source so that a solvent enters the first solvent tank after coming, and the other end of the first solvent tank is communicated with the first solvent storage tank so that the solvent enters the first solvent storage tank;
the outlet end of the first solvent storage tank is respectively connected with the inlet end of the first molecular sieve column and the inlet end of the stirring tank so that the solvent in the first solvent storage tank can selectively enter the first molecular sieve column or the stirring tank;
the outlet end of the first molecular sieve column is connected with the inlet end of the first solvent storage tank so that the solvent passing through the first molecular sieve column enters the first solvent storage tank again;
and a feed inlet is formed in the stirring tank.
2. The electrolyte preparation system of claim 1, wherein: the feed inlet is connected with the glove box so that feeding can be carried out in the glove box.
3. The electrolyte preparation system of claim 1, wherein: the system further comprises at least one solvent treatment tank, at least one holding tank, and at least one molecular sieve treatment column;
the outlet end of the solvent treatment tank is respectively connected with the inlet end of the molecular sieve treatment column and the inlet end of the storage tank so that the solvent or solution in the solvent treatment tank can selectively enter the molecular sieve treatment column or the storage tank;
the outlet end of the molecular sieve treatment column is connected with the inlet end of the solvent treatment tank so that the solvent or solution passing through the molecular sieve treatment column enters the solvent treatment tank again;
the outlet end of the storage tank is connected with the inlet end of the stirring tank so that the solution in the storage tank flows into the stirring tank.
4. The electrolyte preparation system of claim 3, wherein: the first solvent tank, the stirring tank, the first molecular sieve column and the molecular sieve treatment column are all independently connected with a protective gas source for placing protective gas.
5. The electrolyte preparation system of claim 3, wherein: the first solvent storage tank, the solvent treatment tank, the storage tank and the stirring tank are all independently connected with a vacuum pumping pump.
6. The electrolyte preparation system of claim 3, wherein: the first solvent tank, the first molecular sieve column, the molecular sieve treatment column and the stirring tank are respectively connected with a protective gas source through a pipeline A, a pipeline E, a pipeline K and a pipeline I.
7. The electrolyte preparation system of claim 6, wherein: the first solvent storage tank, the solvent treatment tank, the storage tank and the stirring tank are respectively connected with a vacuum pumping pump through a pipeline C, a pipeline O, a pipeline P and a pipeline H.
8. The electrolyte preparation system of claim 7, wherein: the first solvent tank is connected with the first solvent storage tank through a pipeline B; the outlet end of the first solvent storage tank is connected with the inlet end of the first molecular sieve column through a pipeline D; the outlet end of the first molecular sieve column is connected with the inlet end of a first solvent storage tank through a pipeline F; the outlet end of the first solvent storage tank is connected with the inlet end of the stirring tank through a pipeline G;
the outlet end of the solvent treatment tank is connected with the inlet end of the molecular sieve treatment column through a pipeline J; the outlet end of the molecular sieve treatment column is connected with the inlet end of the solvent treatment tank through a pipeline L; the outlet end of the solvent treatment tank is connected with the inlet end of the storage tank through a pipeline M;
the outlet end of the storage tank is connected with the inlet end of the stirring tank through a pipeline N; the outlet end of the stirring tank is connected with the inlet end of the solvent treatment tank through a pipeline Q.
9. The electrolyte preparation system of claim 8, wherein: the pipeline A, the pipeline E, the pipeline K and the pipeline I are respectively and independently connected with a one-way valve and a flowmeter;
and a weighing device is arranged on the first solvent storage tank.
10. The electrolyte preparation system of claim 3, wherein: a first magnetic pump and a first three-way valve are arranged between the outlet end of the first solvent storage tank and the first molecular sieve column and the stirring tank and are used for conveying the solution or the solvent to the first molecular sieve column or the stirring tank;
a second magnetic pump and a second three-way valve are arranged between the outlet end of the solvent treatment tank and the molecular sieve treatment column and between the outlet end of the solvent treatment tank and the storage tank, and are used for conveying the solution or the solvent to the molecular sieve treatment column or the storage tank;
a third magnetic pump is arranged between the storage tank and the stirring tank.
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|---|---|---|---|
| CN202120782570.6U CN217795551U (en) | 2021-04-16 | 2021-04-16 | Electrolyte preparation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120782570.6U CN217795551U (en) | 2021-04-16 | 2021-04-16 | Electrolyte preparation system |
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