Electrolyte preparation process

Abstract

The application relates to the technical field of electrolyte, in particular to an electrolyte preparation process, which comprises the following steps: S1: electrolyte salt and organic solvent are mixed in a stirring mechanism of a mixing device to prepare a primary product; S2: additives are added into a stirring device to mix with the primary product to prepare an electrolyte semi-finished product; S3: the mixed electrolyte is defoamed through a defoaming mechanism of the mixing device; S4: gas generated in the electrolyte defoaming process is discharged through an exhaust mechanism of the mixing device; and S5: the electrolyte finished product is discharged from the mixing device after defoaming. The mixing device comprises the stirring mechanism, a transmission mechanism fixed to the right side of the stirring mechanism, an exhaust mechanism fixed to the lower side of the stirring mechanism, and a defoaming mechanism fixed to the lower side of the exhaust mechanism, which has the beneficial effect of eliminating the bubbles generated in the electrolyte preparation process.

Description

Technical Field

[0001] This invention relates to the field of electrolyte technology, and more specifically to an electrolyte preparation process. Background Technology

[0002] Electrolyte is the medium used in chemical batteries, electrolytic capacitors, etc. It provides ions for their normal operation and ensures that the chemical reactions that occur during operation are reversible. It is often used as the cathode. When electrolyte is used in lithium batteries, it plays the role of conducting electrons between the positive and negative electrodes of the lithium battery, which is the guarantee for lithium-ion batteries to obtain advantages such as high voltage and high specific energy.

[0003] When preparing the electrolyte, it is necessary to stir it. During the stirring process, gas is stirred into the electrolyte, which causes tiny bubbles to be generated inside the electrolyte. The electrolyte has a certain viscosity, which makes it difficult for the tiny bubbles to be expelled automatically. These tiny bubbles will affect the conduction of electrons in the electrolyte and reduce the performance of the lithium battery. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an electrolyte preparation process, the beneficial effect of which is to eliminate bubbles generated during the preparation of electrolyte.

[0005] An electrolyte preparation process, the process comprising the following steps:

[0006] S1: Electrolyte salts and organic solvents are added to the stirring mechanism of a mixing device and mixed to produce a preliminary product;

[0007] S2: Add the additives to the stirring device and mix them with the initial product to make a semi-finished electrolyte product;

[0008] S3: The mixed electrolyte is defoamed by the defoaming mechanism of the mixing device;

[0009] S4: The gas produced during the defoaming process of the electrolyte is discharged through the exhaust mechanism of the mixing device;

[0010] S5: After defoaming is completed, the electrolyte product is obtained by discharging it from the mixing device.

[0011] The electrolyte salt in step S1 is lithium hexafluorophosphate, and the organic solvent in step S1 is a mixture of 1-2 parts diethyl carbonate and 2-3 parts methyl ethyl carbonate.

[0012] The additives in step S2 are fluoroethylene carbonate, difluoroethylene carbonate, vinylene carbonate, and lithium bis(oxalato)borate.

[0013] The mixing device includes a stirring mechanism, a transmission mechanism fixedly connected to the right side of the stirring mechanism, an exhaust mechanism fixedly connected to the lower side of the stirring mechanism, and a defoaming mechanism fixedly connected to the lower side of the exhaust mechanism. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 This is a process flow diagram of the electrolyte preparation process in this invention;

[0016] Figure 2 This is a schematic diagram of the mixing device in this invention;

[0017] Figure 3 This is a cross-sectional view of the mixing device in this invention;

[0018] Figure 4 This is a schematic diagram of the stirring mechanism and transmission mechanism in this invention;

[0019] Figure 5 This is a schematic diagram of the stirring mechanism in this invention;

[0020] Figure 6 This is a schematic diagram of the transmission mechanism in this invention;

[0021] Figure 7 This is a schematic diagram of the defoaming mechanism in this invention;

[0022] Figure 8 This is a schematic diagram of the defoaming chamber in this invention;

[0023] Figure 9 This is a schematic diagram of the defoaming disc in the present invention;

[0024] Figure 10 This is a schematic diagram of the exhaust mechanism in this invention;

[0025] Figure 11 This is a cross-sectional view of the exhaust mechanism in this invention;

[0026] Figure 12 This is a schematic diagram of the filter plate in this invention.

[0027] In the diagram: 101 mixing chamber; 102 fixed base II; 103 discharge port; 104 top cover; 105 fixed base I; 106 liquid inlet; 107 material inlet; 108 rotating shaft; 109 mixing roller; 110 pulley I.

[0028] Motor 201; Pulley II 202; Drive shaft I 203; Gearbox 204; Drive shaft II 205; Gear 206;

[0029] 301 Defoaming chamber; 302 Protective cover; 303 Liquid outlet; 304 Defoaming disc; 305 Defoaming sheet; 306 Through hole; 307 Toothed ring;

[0030] Solenoid valve 401; exhaust chamber 402; filter plate 403; exhaust pipe 404; collection pipe 405; collection port 406. Detailed Implementation

[0031] An electrolyte preparation process, the process comprising the following steps:

[0032] S1: Electrolyte salts and organic solvents are added to the stirring mechanism of a mixing device and mixed to produce a preliminary product;

[0033] S2: Add the additives to the stirring device and mix them with the initial product to make a semi-finished electrolyte product;

[0034] S3: The mixed electrolyte is defoamed by the defoaming mechanism of the mixing device;

[0035] S4: The gas produced during the defoaming process of the electrolyte is discharged through the exhaust mechanism of the mixing device;

[0036] S5: After defoaming is completed, the electrolyte product is obtained by discharging it from the mixing device.

[0037] The electrolyte salt in step S1 is lithium hexafluorophosphate, and the organic solvent in step S1 is a mixture of 1-2 parts diethyl carbonate and 2-3 parts methyl ethyl carbonate.

[0038] The additives in step S2 are fluoroethylene carbonate, difluoroethylene carbonate, vinylene carbonate, and lithium bis(oxalato)borate.

[0039] like Figure 1-12 As shown, this example can achieve the effect of eliminating bubbles generated during the preparation of electrolyte.

[0040] The mixing device in the electrolyte preparation process includes a stirring mechanism, a transmission mechanism fixed to the right side of the stirring mechanism, an exhaust mechanism fixed to the lower side of the stirring mechanism, and a defoaming mechanism fixed to the lower side of the exhaust mechanism. Electrolyte salts are mixed with organic solvents and then introduced into the stirring mechanism. The stirring mechanism is then activated, dissolving the electrolyte salts in the organic solvent. Additives are then added to the solution, and the additives are mixed with the solution to prepare the electrolyte, thus completing the electrolyte mixing process. The mixed electrolyte is then introduced into the defoaming mechanism, which separates the bubbles generated during stirring from the electrolyte. The separated bubbles are discharged through the exhaust mechanism, thereby eliminating tiny bubbles in the electrolyte. During this process, the transmission mechanism provides power to other mechanisms, further eliminating bubbles generated during electrolyte preparation.

[0041] like Figure 1-5 As shown, this example can achieve the effect of preparing electrolyte semi-finished products.

[0042] The stirring mechanism in the electrolyte preparation process includes a stirring chamber 101, with a top cover 104 fixedly attached to the upper side of the stirring chamber 101. A liquid inlet 106 is provided on the rear side of the top cover 104, a feeding inlet 107 is provided on the left side of the top cover 104, and a discharge outlet 103 is provided on the lower side of the stirring chamber 101. Solids from the electrolyte salt, additives, and organic solvent are added to the stirring chamber 101 through the feeding inlet 107, while liquids are added to the stirring chamber 101 through the liquid inlet 106. This prevents contamination of the inlet of the stirring chamber 101 after mixing of dry and wet materials, thus keeping the inlet of the stirring chamber 101 clean. The electrolyte semi-finished product is then stirred within the stirring chamber 101, uniformly mixing the electrolyte raw materials. After mixing, the electrolyte semi-finished product is discharged through the discharge outlet 103, thereby achieving the effect of preparing the electrolyte semi-finished product.

[0043] like Figure 1-5 As shown, this example can achieve the effect of facilitating the uniform mixing of electrolyte raw materials.

[0044] In the electrolyte preparation process, the top cover 104 is rotatably connected to a rotating shaft 108, and four staggered stirring rollers 109 are fixedly connected to the lower part of the rotating shaft 108. The stirring rollers 109 are made of glass, which prevents the electrolyte raw materials from corroding the stirring rollers 109 during the stirring process. Rotating the rotating shaft 108 drives the stirring rollers 109 to rotate. When the staggered stirring rollers 109 rotate, they can form vortices inside the stirring chamber 101, thereby uniformly mixing the electrolyte raw materials together, thus achieving the effect of easy and uniform mixing of electrolyte raw materials.

[0045] like Figure 1-6 As shown, this example can achieve the effect of rotating shaft 108.

[0046] Since the transmission mechanism in the electrolyte preparation process includes a motor 201, the motor 201 is fixed to the upper side of the top cover 104, and the motor 201 drives the rotating shaft 108 to rotate; starting the motor 201, the motor 201 drives the rotating shaft 108 to rotate, thereby achieving the effect of rotating the rotating shaft 108.

[0047] like Figure 1-9 As shown, this example can achieve the effect of separating tiny bubbles in the electrolyte.

[0048] The defoaming mechanism in the electrolyte preparation process includes a defoaming chamber 301. A defoaming disc 304 is rotatably connected inside the defoaming chamber 301. Multiple defoaming sheets 305 are fixed to the upper side of the defoaming disc 304, arranged in a ring on the disc. All defoaming sheets 305 are tilted to one side. Four through holes 306 are provided on the defoaming disc 304, located outside the defoaming sheets 305. After the electrolyte semi-finished product from the stirring chamber 101 flows into the defoaming chamber 301, the defoaming disc 304 rotates, causing the defoaming sheets 305 to rotate around the central axis of the disc 304. The rotation of the annular and downward-sloping defoaming plate 305 causes the electrolyte to rotate. Since the density of the bubbles is less than that of the electrolyte, the centrifugal force on the electrolyte is greater than that on the microbubbles. This causes the electrolyte to be thrown towards the outer layer of the defoaming chamber 301, while the microbubbles are squeezed towards the inner layer of the defoaming chamber 301 by the electrolyte, thus separating the microbubbles from the electrolyte. After the microbubbles are separated from the electrolyte, the electrolyte on the outer layer of the defoaming chamber 301 flows downward through the through holes 306 on the defoaming plate 304, further separating the electrolyte from the microbubbles and preventing the microbubbles from being reintegrated into the electrolyte. This achieves the effect of separating the microbubbles from the electrolyte.

[0049] like Figure 1-9 As shown, this example can achieve the effect of rotating the defoaming disc 304.

[0050] In the electrolyte preparation process, a pulley I110 is fixedly connected to the upper part of the rotating shaft 108, and a fixed seat I105 is fixedly connected to the right side of the top cover 104. A drive shaft I203 is rotatably connected inside the fixed seat I105, and a pulley II202 is fixedly connected to the upper side of the drive shaft I203. The pulley I110 drives the pulley II202 to rotate via a belt. A fixed seat II102 is fixedly connected to the bottom of the stirring chamber 101, and a drive shaft II205 is rotatably connected inside the fixed seat II102. A gearbox 204 is fixedly connected to the fixed seat II102, and the bottom end of the drive shaft I203 is connected to the gearbox. 204 is connected to the top of the transmission shaft II 205, and a gear 206 is fixedly connected to the lower side of the transmission shaft II 205; a gear ring 307 is fixedly connected to the outer side of the defoaming disc 304, and the gear 206 meshes with the gear ring 307; when the motor 201 drives the rotating shaft 108 to rotate, the rotating shaft 108 drives the pulley I 110 to rotate, which in turn drives the pulley II 202 to rotate through the belt, which in turn drives the transmission shaft I 203 to rotate the transmission shaft II 205, which in turn drives the gear 206 to rotate, which in turn drives the gear ring 307 to rotate, which in turn drives the defoaming disc 304 to rotate, thereby achieving the effect of rotating the defoaming disc 304.

[0051] The fixed base I 105 and fixed base II 102 can support the drive shaft I 203, drive shaft II 205 and gearbox 204, thereby preventing the above components from shifting or falling during operation, and thus preventing the operation of the power mechanism from being affected. When the drive shaft I 203 drives the drive shaft II 205 to rotate, the gearbox 204 can accelerate the rotation speed of the drive shaft II 205, thereby increasing the rotation speed of the defoaming disc 304, thereby increasing the rotation speed of the defoaming sheet 305, thereby accelerating the rotation speed of the electrolyte, thereby increasing the centrifugal force on the electrolyte, and thus enhancing the effect of separating the electrolyte from microbubbles.

[0052] like Figure 1-9 As shown, this example can achieve the effect of discharging the finished electrolyte product.

[0053] Because a protective cover 302 is fixed to the outside of the defoaming chamber 301 in the electrolyte preparation process, and the protective cover 302 is located outside the toothed ring 307, and an outlet 303 is opened at the bottom of the defoaming chamber 301; the protective cover 302 connects the upper and lower parts of the defoaming chamber 301, thereby preventing the upper part of the defoaming chamber 301 from rotating with the defoaming disc 304; adding lubricating oil to the inside of the protective cover 302, thereby isolating the defoaming disc 304 from the outside, thereby sealing the defoaming disc 304 inside the protective cover 302, and increasing the sealing between the defoaming disc 304 and the defoaming chamber 301, thereby preventing electrolyte leakage; after defoaming, the electrolyte flowing down from the through hole 306 flows into the lower part of the defoaming chamber 301, and is then discharged through the outlet 303, thereby achieving the effect of discharging the finished electrolyte.

[0054] like Figure 1-12 As shown, this example can achieve the effect of expelling the separated microbubbles.

[0055] The venting mechanism in the electrolyte preparation process includes a solenoid valve 401. The top of the solenoid valve 401 is fixed to the lower side of the outlet 103, and the bottom of the solenoid valve 401 is fixed to a venting chamber 402. A venting pipe 404 is sealed and connected to the left side of the venting chamber 402. After the electrolyte semi-finished product flows out of the outlet 103, it flows to the solenoid valve 401. The flow of the electrolyte semi-finished product is controlled by the opening and closing of the solenoid valve 401. After the microbubbles are separated in the electrolyte, they are collected below the venting pipe 404 of the venting chamber 402. The bubbles are then discharged from the mixing device through the venting pipe 404. Since the venting pipe 404 has an inclined angle, it can prevent the electrolyte from flowing out of the mixing device during the venting process, thereby achieving the effect of discharging the separated microbubbles.

[0056] like Figure 1-12 As shown, this example demonstrates how to easily expel tiny air bubbles.

[0057] Because a filter plate 403 is fixedly connected to the lower side of the exhaust pipe 404 in the electrolyte preparation process, and the filter plate 403 is located at the top of the defoaming chamber 301, the filter plate 403 has multiple round holes inside, and a collection pipe 405 is fixedly connected to the lower side of the filter plate 403, with multiple collection ports 406 inside the collection pipe 405; the multiple round holes on the filter plate 403 can block solids in the electrolyte semi-finished product, thereby preventing the unmixed electrolyte from being discharged from the mixing device. During the rotation of the defoaming disc 304, it is in a defoaming state. When the tiny bubbles inside the disc 304 come into contact with the collecting tube 405, they are adsorbed onto the collecting tube 405. As the number of adsorbed tiny bubbles increases, multiple bubbles aggregate together, and then aggregate into larger bubbles. The larger bubbles are thrown outwards by the electrolyte and squeezed into the collecting port 406. After that, they move to the bottom of the exhaust pipe 404 and are discharged from the exhaust pipe 404. By aggregating the tiny bubbles into larger bubbles, the buoyancy of the bubbles can be increased, which makes it easier for the bubbles to rise and move into the exhaust pipe 404, thus achieving the effect of facilitating the discharge of tiny bubbles.

Claims

1. An electrolyte preparation process, characterized in that: The process includes the following steps: S1: Electrolyte salts and organic solvents are added to the stirring mechanism of a mixing device and mixed to produce a preliminary product; S2: Add the additives to the stirring device and mix them with the initial product to make a semi-finished electrolyte product; S3: The mixed electrolyte is defoamed by the defoaming mechanism of the mixing device; S4: The gas produced during the defoaming process of the electrolyte is discharged through the exhaust mechanism of the mixing device; S5: After defoaming is completed, the electrolyte product is obtained by discharging it from the mixing device; The mixing device includes a stirring mechanism, a transmission mechanism fixedly connected to the right side of the stirring mechanism, an exhaust mechanism fixedly connected to the lower side of the stirring mechanism, and a defoaming mechanism fixedly connected to the lower side of the exhaust mechanism. The stirring mechanism includes a stirring chamber (101), a discharge port (103) is provided on the lower side of the stirring chamber (101), a top cover (104) is fixedly connected to the upper side of the stirring chamber (101), a liquid inlet (106) is provided on the rear side of the top cover (104), a feed inlet (107) is provided on the left side of the top cover (104), a rotating shaft (108) is rotatably connected inside the top cover (104), and four staggered stirring rollers (109) are fixedly connected to the lower part of the rotating shaft (108). The transmission mechanism includes a motor (201), which is fixedly connected to the upper side of the top cover (104). The motor (201) drives the rotating shaft (108) to rotate. A pulley I (110) is fixedly connected to the upper part of the rotating shaft (108). A fixed seat I (105) is fixedly connected to the right side of the top cover (104). A transmission shaft I (203) is rotatably connected inside the fixed seat I (105). A pulley II (202) is fixedly connected to the upper side of the transmission shaft I (203). Ⅰ (110) drives pulley Ⅱ (202) to rotate via belt. The bottom of the mixing chamber (101) is fixedly connected to a fixed seat Ⅱ (102). The fixed seat Ⅱ (102) is rotatably connected to a drive shaft Ⅱ (205). The upper side of the fixed seat Ⅱ (102) is fixedly connected to a gearbox 204. The bottom end of the drive shaft Ⅰ (203) is connected to the top end of the drive shaft Ⅱ (205) via the gearbox 204. The lower side of the drive shaft Ⅱ (205) is fixedly connected to a gear 206. The defoaming mechanism includes a defoaming chamber (301), and a defoaming disc (304) is rotatably connected inside the defoaming chamber (301). Multiple defoaming pieces (305) are fixedly connected to the upper side of the defoaming disc (304). The multiple defoaming pieces (305) are arranged in a ring on the defoaming disc (304). The multiple defoaming pieces (305) are tilted to one side. Four through holes (306) are opened on the defoaming disc (304). The four through holes (306) are all located on the outside of the multiple defoaming pieces (305). A gear ring (307) is fixedly connected to the outside of the defoaming disc (304). The gear (206) meshes with the gear ring (307). A protective cover (302) is fixed to the outside of the defoaming chamber (301). The protective cover (302) is located outside the toothed ring (307). An outlet (303) is opened at the bottom of the defoaming chamber (301). The exhaust mechanism includes a solenoid valve (401), the top of which is fixedly connected to the lower side of the discharge port (103), and an exhaust chamber (402) is fixedly connected to the bottom of the solenoid valve (401). An exhaust pipe (404) is sealed and connected to the left side of the exhaust chamber (402). A filter plate (403) is fixedly connected to the lower side of the exhaust pipe (404). The filter plate (403) is located at the top of the defoaming chamber (301). Multiple round holes are opened inside the filter plate (403). A collection pipe (405) is fixedly connected to the lower side of the filter plate (403). Multiple collection ports (406) are opened inside the collection pipe (405).

2. The electrolyte preparation process according to claim 1, characterized in that: The electrolyte salt in step S1 is lithium hexafluorophosphate, and the organic solvent in step S1 is a mixture of 1-2 parts diethyl carbonate and 2-3 parts methyl ethyl carbonate.

3. The electrolyte preparation process according to claim 1, characterized in that: The additives in step S2 are fluoroethylene carbonate, difluoroethylene carbonate, vinylene carbonate, and lithium bis(oxalato)borate.

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