A method and device for producing lithium battery electrolyte

Abstract

The application discloses a lithium battery electrolyte production method and device, which comprises a tank body and a fixed plate, the tank body is internally provided with the fixed plate, characterized in that the top end of the fixed plate is uniformly provided with a plurality of columnar filter screens along the circumferential direction thereof, and a U-shaped tube with a telescopic end is rotationally arranged at the central position of the fixed plate; on the rotating stroke of the U-shaped tube, the telescopic end of the U-shaped tube is in a stretching state for cleaning the columnar filter screens and a contraction state for being separated from the columnar filter screens; the stretching of the telescopic end of the U-shaped tube enables the U-shaped tube to be connected with the columnar filter screens, and the U-shaped tube is in an open state, thereby realizing the cleaning operation of the U-shaped tube on the columnar filter screens; the contraction of the telescopic end of the U-shaped tube enables the telescopic end of the U-shaped tube to be separated from the columnar filter screens and the fixed plate; when the U-shaped tube rotates, the abrasion of the telescopic end of the U-shaped tube and the fixed plate is reduced, the U-shaped tube is in a closed state, and the mixed solution is prevented from entering the U-shaped tube.

Description

Technical Field

[0001] The present invention relates to the technical field related to lithium battery electrolyte, and in particular to a method and device for producing lithium battery electrolyte. Background Art

[0002] As is known, lithium battery electrolyte is an important component of lithium batteries. Lithium battery electrolyte is an important medium that carries lithium ions in the electrolyte solution to the positive and negative electrodes of the battery. The electrolyte is mainly composed of three parts: solvent, additives and lithium salt. The production method of the lithium battery electrolyte includes the following steps: raw material preparation, dissolution of lithium salt, mixing of additives, filtration and purification, testing and adjustment, packaging and storage. When the lithium battery electrolyte is filtered and purified, the mixed solution (that is, the mixed solution) is filtered through a filter to remove impurities and solid particles therein, so that impurities and solid particles no longer exist in the lithium battery electrolyte.

[0003] In the prior art, the filter is composed of a tank body 1 and a columnar filter 3 (filter element), such as Figure 1 As shown, a fixed plate 2 is provided in the tank body 1, and a plurality of evenly arranged columnar filter screens 3 are connected to the fixed plate 2. A U-shaped tube 4 is rotatably provided on the fixed plate 2, and one end of the U-shaped tube 4 is pressed against the fixed plate 2 and sealed by a sealing ring to prevent the mixed solution from entering the U-shaped tube 4. The mixed solution passes through the fixed plate from the bottom end of the tank body located at the fixed plate 4 and enters the columnar filter screen 3. The mixed solution is filtered by the columnar filter screen 3. The mixed solution flows from the inside of the columnar filter screen 3 to the outside and flows out from the outlet of the tank body 1. Solid particles are trapped inside the columnar filter screen 3. The pressure of the filtered liquid gradually increases. When the contaminated side (that is, the inside of the columnar filter screen) and the clean side are When the pressure difference between the outside and the outside of the columnar filter (that is, the outside of the columnar filter) reaches the set value, the backwash operation starts, the U-tube 4 rotates to the docking position with the columnar filter 3, and the drain valve 18 is opened to form a pressure difference between the outside of the cleaned columnar filter 3 and the drain side (that is, the inside of the columnar filter). Under the action of the pressure difference, the columnar filter 3 is backwashed, and the pollutants accumulated on the inside of the columnar filter 3 are washed away and discharged through the drain pipe 17. When the backwash set time is reached, the drain valve 18 is closed, and the flushing process of the columnar filter 3 is ended. The U-tube 4 gradually docks with each columnar filter 3 and completes the backwashing, thereby realizing the cleaning operation of the columnar filter 3.

[0004] The above-mentioned prior art has the disadvantage that, when the U-shaped tube rotates, the end of the U-shaped tube is pressed against the fixed plate, and the rotation of the U-shaped tube causes the sealing ring to wear, resulting in a loose seal between the U-shaped tube, the fixed plate and the columnar filter screen, causing the mixed solution to enter the U-shaped tube, thereby affecting the filtration efficiency of the mixed solution. Summary of the Invention

[0005] The application aims to provide a lithium battery electrolyte production method and device to solve the technical problems in the related art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a lithium battery electrolyte production device, comprising a tank body and a fixed plate, the fixed plate is arranged in the tank body, the top end of the fixed plate is uniformly provided with a plurality of columnar filter screens along the circumferential direction thereof, and a U-shaped tube with a telescopic end is rotationally arranged at the center position of the fixed plate; in the rotation stroke of the U-shaped tube, the telescopic end of the U-shaped tube has a stretching state for cleaning the columnar filter screens and a contraction state for separating from the columnar filter screens.

[0007] The inner wall of the tank body and the part at the bottom of the fixed plate are provided with a concave-convex ring groove along the circumferential direction thereof, the concave-convex ring groove comprises a plurality of inverted V-shaped grooves and a plurality of arc grooves arranged in sequence and connected in sequence, a V-shaped groove is arranged at the intersection position of the connecting line between the center of each columnar filter screen and the center of the tank body and the inner wall of the tank body, the interval angle between each V-shaped groove and each columnar filter screen is the same and the number is consistent, two adjacent ends of two adjacent V-shaped grooves are connected and combined into a concave-convex ring groove through an arc groove, a sliding round rod is arranged on the telescopic end of the U-shaped tube, and the sliding round rod is installed in the concave-convex ring groove in a sliding fit mode.

[0008] The telescopic end of the U-shaped tube is provided with a tight round pipe, the top end of the tight round pipe is provided with a first sealing ring, the bottom end of each columnar filter screen is provided with a second sealing ring, and the first sealing ring and the second sealing ring are used in cooperation. The tight round pipe and the U-shaped tube can be slidably sleeved on the U-shaped tube, or can be connected through a corrugated pipe to realize the telescopic connection between the tight round pipe and the U-shaped tube.

[0009] The center part of the bottom end of the fixed plate and the outer side of the U-shaped tube are provided with an auxiliary ring pipe, and an auxiliary telescopic mechanism is arranged on the auxiliary ring pipe, which is used to ensure the stability of the telescopic tight round pipe.

[0010] The part at the bottom end of the concave-convex ring groove on the tank body is provided with a feeding pipe.

[0011] The part at the top end of the fixed plate on the tank body is provided with a discharging pipe.

[0012] The part at the top end of the fixed plate on the tank body is provided with a blowdown pipe, one end of the blowdown pipe in the tank body is connected to the rotating end of the U-shaped tube in a rotary fit mode, and the other end of the blowdown pipe outside the tank body is connected with a blowdown valve.

[0013] The top end of each columnar filter screen is provided with a cover plate.

[0014] The U-shaped pipe is provided with a driven switch mechanism for opening and closing the U-shaped pipe, the driven switch mechanism comprises a ball valve and a driven gear, the part of the U-shaped pipe located at the bottom end of the circular pipe is provided with the ball valve in a rotating fit mode, the rotation of the ball valve can close and open the U-shaped pipe, the driven gear is connected to the outer end of the U-shaped pipe, the driving rack is arranged on the connecting plate, and the driving rack and the driven gear are used in meshing mode.

[0015] The method comprises the following steps: the mixed solution is filtered and impurities are removed through the U-shaped pipe in the filtering and purifying step of the lithium battery electrolyte.

[0016] The beneficial effects of the present application are that: by stretching the telescopic end of the U-shaped pipe, the U-shaped pipe and the cylindrical filter screen are connected, and the U-shaped pipe is in an open state, realizing the cleaning operation of the U-shaped pipe on the cylindrical filter screen, by contracting the telescopic end of the U-shaped pipe, the telescopic end of the U-shaped pipe is separated from the cylindrical filter screen and the fixed plate, when the U-shaped pipe rotates, the abrasion of the telescopic end of the U-shaped pipe and the fixed plate is reduced, the U-shaped pipe is in a closed state, and the mixed solution is prevented from entering the U-shaped pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 It is a sectional structure schematic diagram of the prior art;

[0019] Figure 2 It is a three-dimensional structure schematic diagram of the present application;

[0020] Figure 3 It is a top view of the present application; Figure 2

[0021] Figure 4 It is a front view of the present application; Figure 2

[0022] Figure 5 It is a sectional structure schematic diagram of A-A in the present application; Figure 3

[0023] Figure 6 It is a sectional structure schematic diagram of B-B in the present application; Figure 3

[0024] ​​​​Figure 7 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at CC in FIG;

[0025] Figure 8 For the present invention Figure 6 A local enlarged view of M in FIG;

[0026] Figure 9 It is a schematic cross-sectional structural diagram of the ball valve of the present invention in a closed state;

[0027] Figure 10 This is a schematic diagram of the internal structure of the tank body of the present invention;

[0028] Figure 11 Schematic diagram of the three-dimensional structure of the concave-convex ring groove of the present invention;

[0029] Figure 12 For the present invention Figure 11 Plane expansion diagram of ;

[0030] Figure 13 For the present invention Figure 7 A local enlarged view of point N in FIG.

[0031] Description of reference numerals:

[0032] 1. Tank body; 2. Fixing plate; 3. Columnar filter screen; 4. U-shaped tube; 5. Concave and convex ring groove; 51. Arc groove; 52. V-shaped groove; 6. Sliding round rod; 7. Tightening round tube; 8. First sealing ring; 9. Second sealing ring; 10. Auxiliary ring tube; 11. Auxiliary ring groove; 12. Arc plate; 13. Straight groove; 14. Connecting plate; 15. Feed pipe; 16. Discharge pipe; 17. Drain pipe; 18. Drain valve; 19. Cover plate; 20. Ball valve; 21. Driven gear; 22. Active rack; 23. Through groove; 24. Socket; 25. Insert rod; 26. Return rod; 27. Elastic part; 28. Raised block. DETAILED DESCRIPTION

[0033] In order to make those skilled in the art better understand the technical solution of the present invention, Figure 1 To the attached Figure 13 The present invention is further described in detail.

[0034] A lithium battery electrolyte production device provided by an embodiment of the present invention includes a tank body 1 and a fixed plate 2. The fixed plate 2 is arranged in the tank body 1, and a plurality of columnar filter screens 3 are evenly arranged on the top of the fixed plate 2 along its circumferential direction. A U-shaped tube 4 with a telescopic end is rotatably provided at the center position of the fixed plate 2. During the rotation stroke of the U-shaped tube 4, the telescopic end of the U-shaped tube 4 is in a stretched state for cleaning the columnar filter screen 3 and in a contracted state for detaching from the columnar filter screen 3.

[0035] Specifically, the tank body 1 is a container for containing mixed liquid, the fixed plate 2 divides the tank body 1 into two parts, a plurality of cylindrical filter screens 3 are arranged in the half part of the tank body 1 above the fixed plate 2, the cylindrical filter screen 3 is composed of an outer mesh column and an inner filter core, the filter core can be replaced, and the bottom end of the mesh column can be fixedly connected with the fixed plate 2 (such as welding) or abut against the fixed plate 2 (such as the mesh column and the fixed plate 2 are movably and sealingly connected), the mixed solution enters the tank body 1 from the lower half part of the tank body 1 below the fixed plate 2, an inlet pipe 15 is arranged at the position of the tank body 1 above the fixed plate 2, and an outlet pipe is arranged at the position of the tank body 1 above the fixed plate 2, one end of a U-shaped pipe 4 is arranged at the center of the fixed plate 2 in a rotating manner, and the end is a rotating end, the rotating end of the U-shaped pipe 4 is connected with a blowdown pipe 17 in a rotating manner, the blowdown pipe 17 is provided with a blowdown valve 18, the other end of the U-shaped pipe 4 can be stretched and contracted, and the end is a stretching and contracting end, the stretching and contracting end can be slidingly sleeved with two pipe fittings or connected through a bellows to realize the stretching and contracting operation of the stretching and contracting end, the top of the rotating end is higher than the stretching and contracting end, so that the rotating end penetrates through the fixed plate 2, the stretching and contracting end is provided with a sealing ring for sealing when the stretching and contracting end is connected with the bottom opening of the cylindrical filter screen 3, a driving motor is arranged at the bottom end of the tank body 1, the output end of the driving motor penetrates through the bottom end of the tank body 1 and is connected with the U-shaped pipe 4, so that the axis of the motor shaft of the driving motor coincides with the axial direction of the rotating end of the U-shaped pipe 4, a dynamic sealing structure is arranged at the position where the U-shaped pipe 4 and the driving motor are connected, when the mixed solution is filtered, the stretching and contracting end of the U-shaped pipe 4 is contracted, at this time, the stretching and contracting end of the U-shaped pipe 4 is in a closed state and is not connected with the cylindrical filter screen 3 (that is, the stretching and contracting end of the U-shaped pipe 4 is separated from the cylindrical filter screen 3), the mixed solution enters the tank body 1 from the lower half part of the tank body 1 below the fixed plate 2, and enters the cylindrical filter screens 3 at the bottom end of the fixed plate 2 in the tank body 1, the mixed solution is filtered by the cylindrical filter screens 3, as the mixed solution gradually enters, the pressure of the mixed solution in the cylindrical filter screens 3 gradually increases, the mixed solution flows from the inside to the outside of the cylindrical filter screens 3 and flows out from the outlet of the tank body 1, and solid particles are intercepted in the inside of the cylindrical filter screens 3, so that the mixed solution is filtered, when the pressure difference between the contaminated side (that is, the inside of the cylindrical filter screen 3) and the clean side (that is, the outside of the cylindrical filter screen 3) reaches a set value (or when the impurities in the inside of the cylindrical filter screen 3 are relatively large), backwashing is started, the U-shaped pipe 4 is driven to rotate to the connecting position of the cylindrical filter screen 3 by the driving motor, at this time, the stretching and contracting end of the U-shaped pipe 4 is stretched, so that the stretching and contracting end of the U-shaped pipe 4 is connected with the cylindrical filter screen 3 and is in an open state, the blowdown valve 18 is opened, so that a pressure difference is formed between the outside of the cleaned cylindrical filter screen 3 and the blowdown side (that is, the inside of the cylindrical filter screen 3), under the action of the pressure difference, the cylindrical filter screen 3 is backwashed, the pollutants gathered in the inside of the filter core are washed away and discharged through the blowdown port.The pressure formed from large to small in turn is the lower part of the fixed plate 2, the upper part of the fixed plate 2, and the inside part of the U-shaped tube 4, so only the U-shaped tube 4 needs to be aligned with the backwashing process of the columnar filter screen 3, and even during the filtration process, backwashing can be automatically achieved, that is, part of the backwashing and part of the filtration are in the same space, when the backwashing setting time is reached, the blowdown valve 18 is closed, the flushing process of the columnar filter screen 3 is completed, the U-shaped tube 4 gradually interfaces with each columnar filter screen 3 and completes backwashing, during backwashing, the columnar filter screen 3 can still maintain continuous filtration, realizing cleaning of the columnar filter screen 3, when ultra-cleaning of the columnar filter screen 3 is needed, the water outlet pipe is closed, the blowdown valve 18 is opened, and all the pressure difference is concentrated on one columnar filter screen 3, so that the columnar filter screen 3 can be thoroughly cleaned, and backwashing of all columnar filter screens 3 is sequentially completed, in the prior art, when the U-shaped tube 4 rotates, the end of the U-shaped tube 4 abuts against the fixed plate 2, due to rotation of the U-shaped tube 4, the sealing ring is worn, the sealing between the U-shaped tube 4 and the fixed plate 2 and the columnar filter screen 3 is not tight, and the mixed solution enters the U-shaped tube 4, affecting the filtration efficiency of the mixed solution, in the embodiment, the stretching of the telescopic end of the U-shaped tube 4 connects the U-shaped tube 4 and the columnar filter screen 3, and the U-shaped tube 4 is in an open state, realizing cleaning of the columnar filter screen 3 by the U-shaped tube 4, the telescopic end of the U-shaped tube 4 is separated from the columnar filter screen 3 and the fixed plate 2 by contraction of the telescopic end of the U-shaped tube 4, when the U-shaped tube 4 rotates, the wear of the telescopic end of the U-shaped tube 4 and the fixed plate 2 is reduced, the U-shaped tube 4 is in a closed state, preventing the mixed solution from entering the U-shaped tube 4, and ensuring that the sealing strength of the U-shaped tube 4 does not change.

[0036] Further, the inner wall of the tank body 1 and the part of the fixed plate 2 bottom is provided with a concave-convex ring groove 5 along the circumferential direction, the concave-convex ring groove 5 includes a plurality of inverted V-shaped grooves 52 and a plurality of arc grooves 51 arranged in sequence, the intersection position of the connecting line between the center of each cylindrical filter screen 3 and the center of the tank body 1 and the inner wall of the tank body 1 is provided with a V-shaped groove 52 (inverted, hereinafter the same), and the interval angle between each V-shaped groove 52 and each cylindrical filter screen 3 is the same and consistent, the two adjacent ends of the two adjacent V-shaped grooves 52 are connected by the arc groove 51 to form the concave-convex ring groove 5, the telescopic end of the U-shaped tube 4 is provided with a sliding round rod 6, the sliding round rod 6 is installed in the concave-convex ring groove 5 in a sliding fit, specifically, in the stroke of the driving motor driving the U-shaped tube 4 to rotate, the telescopic end of the U-shaped tube 4 drives the sliding round rod 6 to slide along the track of the concave-convex ring groove 5, in the process of the sliding round rod 6 sliding along the track of the concave-convex ring groove 5: (1) when the mixed solution is filtered, at this time the driving motor drives the sliding round rod 6 to slide to the position of the arc groove 51 through the U-shaped tube 4, because the vertical height of the arc groove 51 (that is, the height in the axial direction of the tank body 1) is lower than the vertical height of the inverted V-shaped groove 52, under the drive of the sliding round rod 6, the telescopic end of the U-shaped tube 4 is in a contracted state, and because the position of the cylindrical filter screen 3 and the V-shaped groove 52 is relatively consistent, the telescopic end of the U-shaped tube 4 is separated from the cylindrical filter screen 3 at this time, so that the U-shaped tube 4 will not affect the filtering operation of the cylindrical filter screen 3, that is, in the process of the sliding round rod 6 sliding along the track of the arc groove 51, the telescopic end is always in a contracted state, and the telescopic end will not be connected with the cylindrical filter screen 3, the mixed solution enters the tank body 1 from the lower half of the tank body 1 below the fixed plate 2, and enters the cylindrical filter screen 3 at the bottom of the fixed plate 2 in the tank body 1, and the mixed solution is filtered by the cylindrical filter screen 3, as the mixed solution gradually enters, the pressure of the mixed solution in the cylindrical filter screen 3 gradually increases, the mixed solution flows from the inside to the outside of the cylindrical filter screen 3, and flows out from the outlet of the tank body 1, the solid particles are trapped inside the cylindrical filter screen 3, realizing the filtering treatment of the mixed solution; (2) when the pressure difference between the contaminated side (that is, the inside of the cylindrical filter screen 3) and the clean side (that is, the outside of the cylindrical filter screen 3) reaches a set value (or when there is too much impurity in the inside of the cylindrical filter screen 3), the backwashing operation begins, the driving motor drives the sliding round rod 6 to slide from the arc groove 51 to the V-shaped groove 52 through the telescopic end of the U-shaped tube 4, and the sliding round rod 6 slides from the connecting part of the V-shaped groove 52 and the arc groove 51 to the top end of the V-shaped groove 52 (that is, the corner position of the V-shaped groove 52), because the V-shaped groove 52 is inverted, the sliding round rod 6 drives the telescopic end to slide to the end close to the cylindrical filter screen 3 (that is, the telescopic end performs stretching operation), so that the telescopic end of the U-shaped tube 4 is connected with the cylindrical filter screen 3, and the flushing operation of the cylindrical filter screen 3 is performed again;(3) when the cylindrical filter screen 3 of the flushing operation is completed, the drive motor drives the U-shaped tube 4 to continue to rotate, so that the telescopic end of the U-shaped tube 4 drives the sliding round bar 6 to slide from the top end of the V-shaped groove 52 to the connecting position of the V-shaped groove 52 and the arc groove 51, so that the telescopic end of the U-shaped tube 4 drives the telescopic end to retract, so that the telescopic end of the U-shaped tube 4 does not contact the bottom end of the fixed plate 2 in the process of rotation, preventing the sealing ring on the U-shaped tube 4 from being worn, ensuring that the sealing strength of the U-shaped tube 4 does not change.

[0037] Further, the telescopic end of the U-shaped tube 4 is provided with a tight round pipe 7, the top end of the tight round pipe 7 is provided with a first sealing ring 8, the bottom end of each cylindrical filter screen 3 is provided with a second sealing ring 9, and the first sealing ring 8 and the second sealing ring 9 are used in cooperation, specifically, the tight round pipe 7 can be slidingly sleeved on the U-shaped tube 4, or connected through a corrugated pipe to realize the telescopic connection between the tight round pipe 7 and the U-shaped tube 4, when the drive motor drives the sliding round bar 6 to slide from the connecting part of the V-shaped groove 52 and the arc groove 51 to the top end of the V-shaped groove 52 (that is, the corner position of the V-shaped groove 52) through the telescopic end of the U-shaped tube 4, the sliding round bar 6 drives the tight round pipe 7 to slide to the end close to the cylindrical filter screen 3 (that is, the telescopic end is stretched), when the telescopic end of the U-shaped tube 4 is connected with the cylindrical filter screen 3, the first sealing ring 8 and the second sealing ring 9 on the tight round pipe 7 abut each other, the end of the first sealing ring 8 and the second sealing ring 9 abutting each other can be a flared mouth, that is, the opening of the first sealing ring 8 gradually increases from the bottom end to the top end, while the opening of the second sealing ring 9 gradually increases from the top end to the bottom end, so that the first sealing ring 8 and the second sealing ring 9 can be expanded when abutting, realizing the stability of sealing, the end of the first sealing ring 8 and the second sealing ring 9 abutting each other can be slidingly sleeved, that is, when the first sealing ring 8 and the second sealing ring 9 abut each other, the first sealing ring 8 can be slidingly sleeved into the second sealing ring 9, that is, the second sealing ring 9 is slidingly sleeved in the first sealing ring 8, realizing the sliding sleeve of the first sealing ring 8 and the second sealing ring 9, so that the U-shaped tube 4 and the cylindrical filter screen 3 are stably connected.

[0038] Further, the center part of the bottom end of the fixed plate 2 and outside the U-shaped tube 4 is provided with an auxiliary ring pipe 10, the auxiliary ring pipe 10 is provided with an auxiliary telescopic mechanism, the auxiliary telescopic mechanism is used for guaranteeing the stability of the telescopic of the abutting round pipe 7, the outer wall of the auxiliary ring pipe 10 is provided with an auxiliary ring groove 11, the auxiliary ring groove 11 is slidably connected with an arc surface plate 12, the arc surface plate 12 is provided with a straight groove 13, the straight groove 13 is slidably connected with a connecting plate 14, and the other end of the connecting plate 14 is connected with the outer wall of the abutting round pipe 7, specifically, when the telescopic end of the U-shaped tube 4 is telescoped, the abutting round pipe 7 reciprocates up and down according to the trajectory of the sliding round rod 6 in the concave-convex ring groove 5, the sliding round rod 6 drives the movement of the abutting round pipe 7, which may be unstable, when the U-shaped tube 4 drives the abutting round pipe 7 to rotate, the abutting round pipe 7 drives the arc surface plate 12 to slide along the trajectory of the auxiliary ring groove 11 through the connecting plate 14, and when the abutting round pipe 7 is telescoped, the abutting round pipe 7 drives the connecting plate 14 to reciprocate vertically in the straight groove 13, so that the connecting plate 14 can move according to the movement of the abutting round pipe 7, so that the connecting plate 14 and the sliding round rod 6 can guarantee the stability of the telescopic movement of the abutting round pipe 7, and the abutting round pipe 7 will not deviate from its axis, which improves the stability of the abutting of the abutting round pipe 7 and the columnar filter screen 3.

[0039] Further, the part of the tank body 1 at the bottom end of the concave-convex ring groove 5 is provided with a feeding pipe 15, specifically, the feeding pipe 15 is provided with a valve for opening and closing the feeding pipe 15, which is well known in the art and will not be described here, the feeding pipe 15 can deliver the mixed liquid to the lower half of the tank body 1 below the fixed plate 2, when the feeding pipe 15 delivers the mixed solution, the mixed solution needs to be delivered under pressure to ensure that the mixed solution will not backflow when it is subjected to internal pressure difference.

[0040] Further, the top of the arc panel 12 and the inner wall of the straight slot 13 are provided with a through slot 23, and the through slot 23 is perpendicular to the straight slot 13. The connecting plate 14 is provided with a insertion hole 24 near one end of the auxiliary ring slot 11. The through slot 23 is slidably connected with an insertion rod 25. Two return rods 26 are symmetrically arranged on the two sides of the insertion rod 25. Each return rod 26 is connected with the inner wall of the through slot 23 through an elastic element 27. The outer wall of the auxiliary ring slot 11 is uniformly provided with a plurality of protruding blocks 28 at the same vertical height position as the through slot 23. The positions of the protruding blocks 28 are opposite to the positions of the V-shaped slots 52 (that is, the protruding blocks 28 are arranged at the intersection positions of the connecting lines between the centers of the cylindrical filter screens 3 and the center of the tank body 1 and the inner wall of the tank body 1). Specifically, during the sliding process of the sliding circular rod 6 along the concave-convex ring slot 5: (1) when the mixed solution is filtered, the driving motor drives the sliding circular rod 6 to slide to the position of the arc slot 51 through the U-shaped tube 4. Since the vertical height (that is, the height in the axial direction of the tank body 1) of the arc slot 51 is lower than that of the inverted V-shaped slot 52, the telescopic end of the U-shaped tube 4 is in a contracted state under the driving of the sliding circular rod 6. Since the positions of the cylindrical filter screen 3 and the V-shaped slot 52 are opposite and consistent, the telescopic end of the U-shaped tube 4 is separated from the cylindrical filter screen 3. At this time, the elastic element 27 (the elastic element 27 is an element capable of elastic return, preferably a spring) is in the original length state. Under the abutting action of the elastic element 27, the return rod 26 and the insertion rod 25 are located in the through slot 23 (as shown in Figure 7 and Figure 9 (2) when the pressure difference between the pollution side (that is, the inner side of the cylindrical filter screen 3) and the clean side (that is, the outer side of the cylindrical filter screen 3) reaches a set value (or when there are many impurities on the inner side of the cylindrical filter screen 3), backwashing operation is started. The driving motor drives the sliding circular rod 6 to slide from the arc slot 51 to the V-shaped slot 52 through the telescopic end of the U-shaped tube 4, and the sliding circular rod 6 slides from the connecting part of the V-shaped slot 52 and the arc slot 51 to the top end of the V-shaped slot 52 (that is, the corner position of the V-shaped slot 52). Since the V-shaped slot 52 is arranged in an inverted manner, the telescopic end slides to the end close to the cylindrical filter screen 3 (that is, the telescopic end performs stretching operation) under the driving of the sliding circular rod 6. At this time, the insertion rod 25 is pushed into the insertion hole 24 by the protruding block 28 (the abutting end of the insertion rod 25 and the protruding block 28 is preferably hemispherical, which facilitates the sliding abutment of the insertion rod 25 and the protruding block 28). At this time, the elastic element 27 is in a compressed state (as shown in Figure 8(3) when the columnar filter screen 3 is completed, the driving motor drives the U-shaped pipe 4 to continue rotating, so that the telescopic end of the U-shaped pipe 4 drives the sliding round rod 6 to slide from the top end of the V-shaped groove 52 to the connecting position of the V-shaped groove 52 and the arc surface groove 51, so that the sliding round rod 6 drives the telescopic end to perform the contraction operation, at this time, the protruding block 28 and the plug rod 25 are separated from each other, and the plug rod 25 and the plug hole 24 are separated from each other under the rebounding action of the elastic member 27, so that the plug rod 25 releases the locking of the connecting plate 14, facilitating the backwashing of the columnar filter screen 3 next time.

[0041] Further, the part of the tank body 1 located at the top end of the fixed plate 2 is provided with a discharge pipe 16, specifically, the discharge pipe 16 is provided with a valve for opening and closing the discharge pipe 16, which is a common knowledge in the art and will not be described here. After the columnar filter screen 3 completes the filtration of the mixed solution, the filtered solution is discharged from the tank body 1 through the discharge pipe 16. Since the position of the discharge pipe 16 is relatively high, there is a certain pressure difference in the tank body 1, which facilitates the backwashing of the columnar filter screen 3.

[0042] Further, the part of the tank body 1 located at the top end of the fixed plate 2 is provided with a discharge pipe 17, which is connected to the rotating end of the U-shaped pipe 4 in a rotating manner. The end of the discharge pipe 17 located outside the tank body 1 is connected with a blowdown valve 18. Specifically, when the backwashing operation of the columnar filter screen 3 is needed and the telescopic end and the columnar filter screen 3 are connected, the blowdown valve 18 is opened. Due to the pressure difference between the inside and outside of the columnar filter screen 3, the solution outside the columnar filter screen 3 enters the inside of the columnar filter screen 3, and the impurities in the inside of the columnar filter screen 3 are washed, and then discharged from the U-shaped pipe 4 and the discharge pipe 17, so that the backwashing operation of the columnar filter screen 3 can be performed.

[0043] Further, the top end of each columnar filter screen 3 is provided with a cover plate 19. Specifically, when the filter element in the columnar filter screen 3 no longer has a filtering effect (i.e. when the filter element has too many impurities), the cover plate 19 is opened and the filter element in the columnar filter screen 3 is replaced, and then the cover plate 19 is closed. The opening and closing of the cover plate 19 are connected through the quick plug type and flange type connection structure, which ensures the stability and speed of the installation of the cover plate 19.

[0044] Preferably, the U-shaped tube 4 is provided with a driven switch mechanism for opening and closing the U-shaped tube 4, the driven switch mechanism comprises a ball valve 20 and a driven gear 21, the part of the U-shaped tube 4 located at the bottom end of the abutting circular tube 7 is provided with the ball valve 20 in a rotating fit manner, the rotation of the ball valve 20 can open and close the U-shaped tube 4, the rotation axis of the valve plate of the ball valve 20 is connected with the driven gear 21 at the outer end of the U-shaped tube 4, the driving rack 22 is provided on the connecting plate 14, and the driving rack 22 and the driven gear 21 are used in meshing with each other, specifically, in the rotation stroke of the driving motor driving the U-shaped tube 4, the telescopic end of the U-shaped tube 4 drives the sliding circular rod 6 to slide along the track of the concave-convex ring groove 5, in the process of the sliding circular rod 6 sliding along the track of the concave-convex ring groove 5: (1) when the mixed solution is performing the filtering operation, at this time the driving motor drives the sliding circular rod 6 to slide to the position of the arc groove 51 through the U-shaped tube 4, because the vertical height (that is, the height in the axis direction of the tank body 1) of the arc groove 51 is lower than the vertical height of the inverted V-shaped groove 52, under the driving of the sliding circular rod 6, the telescopic end of the U-shaped tube 4 is in the contraction state, the abutting circular tube 7, the connecting plate 14 and the driving rack 22 are at the same vertical height, at this time the ball valve 20 closes the telescopic end of the U-shaped tube 4 (as shown in Figure 9 ), preventing the mixed solution from pouring into the U-shaped tube 4; (2) when the cylindrical filter screen 3 starts the backwashing operation, the driving motor drives the sliding circular rod 6 to slide from the arc groove 51 to the V-shaped groove 52 through the telescopic end of the U-shaped tube 4, and the sliding circular rod 6 slides from the connecting part of the V-shaped groove 52 and the arc groove 51 to the top end of the V-shaped groove 52 (that is, the corner position of the V-shaped groove 52), because the V-shaped groove 52 is arranged in an inverted manner, the telescopic end is driven by the sliding circular rod 6 to slide to the end close to the cylindrical filter screen 3 (that is, the telescopic end performs the stretching operation), so that the abutting circular tube 7 is abutted with the cylindrical filter screen 3, the abutting circular tube 7 drives the driving rack 22 to move to the end close to the cylindrical filter screen 3 through the connecting plate 14, the driving rack 22 drives the driven gear 21 and the ball valve 20 to rotate by 90 degrees, so that the ball valve 20 opens the U-shaped tube 4, and then the backwashing operation of the cylindrical filter screen 3 is performed (as shown in Figure 8 ); (3) after the backwashing operation of the cylindrical filter screen 3 is completed, the driving motor drives the U-shaped tube 4 to continue to rotate, so that the telescopic end of the U-shaped tube 4 drives the sliding circular rod 6 to slide from the top end of the V-shaped groove 52 to the connecting position of the V-shaped groove 52 and the arc groove 51, so that the telescopic end is driven by the sliding circular rod 6 to perform the contraction operation, the abutting circular tube 7 drives the driving rack 22 to move away from the cylindrical filter screen 3 through the connecting plate 14, the driving rack 22 drives the driven gear 21 and the ball valve 20 to rotate by 90 degrees, so that the ball valve 20 closes the U-shaped tube 4, preventing the mixed solution from pouring into the U-shaped tube 4, preventing the sealing ring on the U-shaped tube 4 from being abraded, and ensuring that the sealing strength of the U-shaped tube 4 remains unchanged.

[0045] The application provides a lithium battery electrolyte production method based on the lithium battery electrolyte production device, and in the filtering and purifying step of the lithium battery electrolyte, the U-shaped tube 4 is used to filter and remove impurities from the mixed solution.

[0046] The foregoing merely illustrates some exemplary embodiments of the application, no doubt numerous modifications and alterations can be made without departing from the spirit and scope of the application. Therefore, the above description is illustrative rather than restrictive, and the scope of the application should be given by the appended claims.

Claims

1. A lithium battery electrolyte production device, comprising a tank body and a fixing plate, wherein the tank body is provided with a fixing plate, characterized in that: A plurality of columnar filters are evenly arranged along the circumferential direction of the top of the fixed plate. A U-shaped tube with a telescopic end is rotatably provided at the center of the fixed plate. During the rotation of the U-shaped tube, the telescopic end of the U-shaped tube has a stretched state for cleaning the columnar filters and a contracted state for detaching from the columnar filters. The inner wall of the tank body and the portion located at the bottom of the fixed plate are provided with a concave-convex annular groove along the circumferential direction thereof, and the concave-convex annular groove includes a plurality of inverted V-shaped grooves and a plurality of arcuate grooves that are arranged at intervals and connected in sequence. A V-shaped groove is provided at the intersection of the connecting line of the center of each columnar filter screen and the center of the tank body and the inner wall of the tank body, and the interval angles between each V-shaped groove and each columnar filter screen are the same and the number is consistent. The two adjacent ends of two adjacent V-shaped grooves are connected by an arcuate groove to form a concave-convex annular groove. A sliding round rod is provided on the telescopic end of the U-shaped tube, and the sliding round rod is installed in the concave-convex annular groove in a sliding fit manner; The telescopic end of the U-shaped tube is telescopically provided with a tight circular tube, the top of the tight circular tube is provided with a first sealing ring, and the bottom end of each columnar filter is provided with a second sealing ring, and the first sealing ring and the second sealing ring are used in conjunction with each other; An auxiliary ring tube is provided at the center of the bottom end of the fixed plate and located outside the U-shaped tube. An auxiliary telescopic mechanism is provided on the auxiliary ring tube to ensure the stability of the telescopic contact with the circular tube. The portion of the tank body located at the bottom end of the concave-convex ring groove is provided with a feed pipe; An auxiliary ring groove is provided on the outer wall of the auxiliary ring tube, and an arc panel is installed in the auxiliary ring groove in a sliding fit manner. A straight groove is provided on the arc panel, and a connecting plate is installed in the straight groove in a sliding fit manner, and the other end of the connecting plate is connected to the outer wall of the circular tube.

2. A lithium battery electrolyte production device according to claim 1, characterized in that: The portion of the tank body located at the top of the fixed plate is provided with a discharge pipe.

3. The lithium battery electrolyte production device according to claim 1, characterized in that: The portion of the tank body located at the top of the fixed plate is provided with a sewage pipe, one end of the sewage pipe located inside the tank body is connected to the rotating end of the U-shaped tube in a rotationally matched manner, and the end of the sewage pipe located outside the tank body is connected to a sewage valve.

4. The lithium battery electrolyte production device according to claim 1, characterized in that: A cover plate is provided on the top of each columnar filter screen.

5. The lithium battery electrolyte production device according to claim 1, characterized in that: A driven switch mechanism is provided in the U-shaped tube, and the driven switch mechanism is used to open and close the U-shaped tube.

6. A method for producing a lithium battery electrolyte, characterized in that: It is based on the lithium battery electrolyte production device described in right 1. In the filtering and purification step of the lithium battery electrolyte, the mixed solution is filtered and impurities are removed through a U-shaped tube.

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