Production device of lithium battery electrolyte

Abstract

The invention provides a lithium battery electrolyte production device which comprises a mixing tank, an electric heating device is arranged in the side wall of the mixing tank, a top cover is detachably arranged at the top of the mixing tank, a stirring shaft capable of vertically ascending and descending is arranged on the top cover, and a plurality of stirring shafts distributed around the stirring shaft are further arranged on the top cover. A stirring blade assembly is arranged on the stirring shaft, a turbulent flow disc arranged on the outer side of the stirring blade assembly in a sleeving mode is arranged on the stirring shaft, and a through hole matched with the stirring blade assembly is formed in the turbulent flow disc. According to the production device of the lithium ion battery electrolyte, the basic requirement for stirring and mixing treatment of the lithium ion battery electrolyte can be met, full mixing treatment of various raw materials can be achieved in the mode that horizontal stirring and vertical turbulent flow stirring are combined, and then the use requirements of people are met more fully.

Description

A production apparatus for lithium battery electrolyte Technical Field

[0001] This invention belongs to the field of lithium-ion battery electrolyte processing technology, and specifically relates to a lithium battery electrolyte production device. Background Technology

[0002] As the core carrier for ion transport within the battery, the performance of the lithium-ion battery electrolyte directly determines the battery's charge-discharge efficiency, cycle life, and safety. This electrolyte is typically formulated precisely in a specific stoichiometric ratio using high-purity organic solvents, lithium electrolyte salts (such as lithium hexafluorophosphate), and various functional additives under strictly anhydrous and oxygen-free conditions. Because the physical properties of the various components (such as density, viscosity, and solubility) differ significantly, an efficient and uniform mixing process is crucial to ensuring consistent electrolyte quality.

[0003] While existing lithium battery electrolyte production equipment can meet the basic requirements of mixing and processing various raw materials to generate electrolyte, current stirring structures typically employ a single "horizontal rotation, vertical fixation" mode. This means the stirring blades only move in a circular motion in the horizontal plane, lacking vertical displacement or directional turbulence mechanisms along the vertical axis. This two-dimensional stirring method, lacking vertical shear force and convection disturbance, allows denser or more viscous raw materials (such as incompletely dissolved lithium salt particles or high-concentration additives) to easily deposit at the bottom of the tank, forming a mixing "dead zone." Meanwhile, lighter solvents tend to float to the top, leading to severe vertical stratification. Furthermore, the single horizontal swirling flow is insufficient to break the interfacial tension between raw materials, failing to achieve three-dimensional turbulence throughout the entire tank, resulting in insufficient dispersion uniformity at the microscale. Therefore, it cannot fully meet the needs of users. Summary of the Invention

[0004] In view of this, the present invention addresses the shortcomings of the prior art by providing a lithium battery electrolyte production apparatus that not only meets the basic requirements for stirring and mixing lithium-ion battery electrolyte, but also achieves thorough mixing of various raw materials through a combination of horizontal stirring and vertical turbulence agitation, thereby more fully meeting people's usage needs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a lithium battery electrolyte production device, including a mixing tank, an electric heating device is provided inside the side wall of the mixing tank, a top cover is detachably provided on the top of the mixing tank, a stirring shaft that can be vertically raised and lowered is provided on the top cover, a plurality of stirring shafts distributed around the stirring shaft are also provided on the top cover, a stirring blade assembly is provided on the stirring shaft, a baffle plate is provided on the stirring shaft and sleeved on the outside of the stirring blade assembly, and a through hole adapted to the stirring blade assembly is provided on the baffle plate.

[0006] As a further improvement of the present invention, the turbulence plate is also provided with a plurality of liquid passage holes, a first turbulence rod located in the liquid passage holes, a second turbulence rod located in the through hole and offset from the stirring blade assembly, and a scraper ring plate that fits against the inner wall of the mixing tank is also provided on the side end of the turbulence plate.

[0007] As a further improvement of the present invention, a mounting bracket is provided on the top cover, and a telescopic push rod is vertically provided on the mounting bracket. The lower end of the output shaft of the telescopic push rod is connected to the stirring shaft through a transmission connecting plate. A connecting sleeve that is slidably connected to the stirring shaft is provided on the top cover. A T-shaped guide groove is provided on the side of the mounting bracket, and a T-shaped slider that is slidably engaged with it is provided on the transmission connecting plate to guide the vertical reciprocating motion of the transmission connecting plate and the stirring shaft.

[0008] As a further improvement of the present invention, the stirring shaft is rotatably supported on the top cover via bearing seats; each stirring shaft is equipped with a synchronous pulley at its upper end, and all synchronous pulleys are connected in series via a closed transmission belt; a main drive motor is also installed on the top cover, and the output shaft of the main drive motor is connected to one of the stirring shafts via a gear reduction assembly to drive all stirring shafts to rotate synchronously. The protective cover installed on the top cover completely covers the high-speed rotating components such as the motor, pulleys, and transmission belts, effectively preventing operators from accidentally touching and injuring themselves, improving production safety, and also preventing external dust and impurities from entering the mixing system.

[0009] As a further improvement of the present invention, a protective cover is also provided on the top cover, which completely covers the synchronous pulley, transmission belt, main drive motor and gear reduction assembly. A fixing plate is provided on the bottom side of the protective cover, and fixing bolts for connecting with the top cover are provided on the fixing plate.

[0010] As a further improvement of the present invention, the top cover is also equipped with a feed hopper and an exhaust pipe. The feed hopper is also equipped with a feed valve, and the exhaust pipe is also equipped with an exhaust valve. The bottom of the mixing tank is also equipped with a discharge pipe, and the discharge pipe is equipped with a discharge valve. The bottom of the mixing tank is also equipped with support legs. The device is equipped with a feed hopper, an exhaust pipe, a discharge pipe, and corresponding valves, realizing fully controllable operation of feeding, venting (discharging the gas generated during mixing or maintaining pressure balance), and discharging, meeting the needs of continuous or batch industrial production.

[0011] As a further improvement of the present invention, a temperature sensor is also provided on the inner wall of the mixing tank, and a temperature controller electrically connected to the electric heating device and the temperature sensor is also provided on the mixing tank.

[0012] As a further improvement of the present invention, the top cover is snapped into the mixing tank, and a pressure washer adapted to the mixing tank is provided on the top and bottom walls of the top cover. Fastening bolts for screwing the mixing tank are also provided on the top cover. The top cover adopts a detachable design (snap-fit ​​and bolted), which facilitates thorough cleaning, inspection, and replacement of parts inside the mixing tank, reducing maintenance costs.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the device innovatively adopts a composite motion mode that combines horizontal stirring with vertical turbulence agitation; through multiple circumferentially distributed stirring shafts and blade assemblies, horizontal shearing and circumferential flow of materials are achieved; at the same time, the central stirring shaft drives the turbulence disk to perform vertical reciprocating motion, and with the design of through holes and liquid passage holes, the materials are forced to generate violent up-and-down tumbling and flow in the vertical direction; this multi-dimensional motion trajectory effectively eliminates mixing dead zones, significantly improves the dispersion uniformity of various raw materials (such as lithium salts, solvents, additives, etc.), shortens the mixing time, and ensures the consistency of the electrolyte.

[0014] Secondly, the scraper rings on the side of the baffle plate can fit tightly against the inner wall of the mixing tank. During the vertical reciprocating motion of the baffle plate, the scraper rings can scrape off the raw materials or semi-finished products adhering to the tank wall in real time, preventing the material from sticking to the wall, coking, or separating. This not only improves the utilization rate of raw materials and ensures the stability of product quality, but also reduces the difficulty of subsequent cleaning.

[0015] Thirdly, the mixing tank integrates an electric heating device inside its sidewall, which, together with the temperature sensor on the inner sidewall and the external temperature controller, forms a closed-loop temperature control system. This allows the device to precisely adjust and maintain the tank temperature according to the requirements of the electrolyte production process (such as accelerating solute dissolution or specific reaction temperatures), improving the controllability of the production process and the product qualification rate.

[0016] Fourth, all stirring shafts are connected in series with synchronous pulleys and transmission belts and driven by the main drive motor, which ensures that the rotation speed of all peripheral stirring shafts is strictly synchronized and the force is uniform, thus avoiding uneven mixing caused by speed differences.

[0017] Fifth, the combination of the T-shaped guide groove and the T-shaped slider not only restricts the circumferential rotation of the central stirring shaft, but also provides precise guidance for its vertical reciprocating motion, ensuring the smooth operation of the equipment and the life of the mechanical structure. Attached Figure Description

[0018] The present invention will now be described in more detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of the discharge pipe of the present invention; Figure 3 is a structural schematic diagram of the stirring blade assembly and the baffle plate of the present invention; Figure 4 is a structural schematic diagram of the first baffle rod of the present invention; Figure 5 is a structural schematic diagram of the stirring blade assembly of the present invention.

[0020] In the diagram: 101. Mixing tank; 102. Top cover; 103. Stirring shaft; 104. Agitator shaft; 105. Agitator blade assembly; 106. Baffle plate; 107. Through hole; 108. Liquid passage hole; 109. First baffle rod; 110. Second baffle rod; 111. Scraper ring; 112. Feed hopper; 113. Exhaust pipe; 114. Feed valve; 115. Exhaust valve; 116. Discharge pipe; 117. 118. Discharge valve; 119. Support leg; 110. Fastening bolt; 201. Mounting bracket; 202. Telescopic push rod; 203. Transmission connecting plate; 204. Connecting sleeve; 205. T-shaped guide groove; 206. T-shaped slider; 301. Synchronous pulley; 302. Transmission belt; 303. Main drive motor; 304. Gear reduction assembly; 305. Protective cover; 306. Fixing plate; 307. Fixing bolt. Detailed Implementation

[0021] To better understand the present invention, the following embodiments further illustrate the content of the invention, but the scope of protection of the present invention is not limited to the following embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0022] As shown in Figures 1 and 3, a lithium battery electrolyte production apparatus includes a mixing tank 101. An electric heating device is installed inside the side wall of the mixing tank 101. A top cover 102 is detachably installed on the top of the mixing tank 101. A stirring shaft 103 capable of vertical lifting is installed on the top cover 102. A plurality of stirring shafts 104 distributed around the stirring shaft 103 are also installed on the top cover 102. A stirring blade assembly 105 is installed on the stirring shaft 104. A baffle plate 106 is installed on the stirring shaft 103 and sleeved on the outside of the stirring blade assembly 105. A through hole 107 adapted to the stirring blade assembly 105 is provided on the baffle plate 106.

[0023] As shown in Figures 3 and 4, the turbulence plate 106 is also provided with a plurality of liquid passage holes 108, a first turbulence rod 109 located in the liquid passage holes 108 is provided on the turbulence plate 106, a second turbulence rod 110 located in the through hole 107 and offset from the stirring blade assembly 105 is also provided on the turbulence plate 106, and a scraper ring plate 111 that fits against the inner wall of the mixing tank 101 is also provided on the side end of the turbulence plate 106.

[0024] As shown in Figures 1 and 3, a mounting bracket 201 is provided on the top cover 102, and a telescopic push rod 202 is vertically provided on the mounting bracket 201. The lower end of the output shaft of the telescopic push rod 202 is connected to the stirring shaft 103 through a transmission connecting plate 203. A connecting sleeve 204 that is slidably connected to the stirring shaft 103 is provided on the top cover 102. A T-shaped guide groove 205 is provided on the side of the mounting bracket, and a T-shaped slider 206 that is slidably engaged with the transmission connecting plate 203 is provided to guide the vertical reciprocating motion of the transmission connecting plate 203 and the stirring shaft 103.

[0025] As shown in Figures 1 and 3, the stirring shaft 104 is rotatably supported on the top cover 102 via bearing seats. Each stirring shaft 104 is equipped with a synchronous pulley 301 at its upper end, and all synchronous pulleys 301 are connected in series via a closed transmission belt 302. A main drive motor 303 is also installed on the top cover 102. The output shaft of the main drive motor 303 is connected to one of the stirring shafts 104 via a gear reduction assembly 304 to drive all stirring shafts 104 to rotate synchronously. A protective cover 305 installed above the top cover 102 completely encloses the high-speed rotating components such as the motor, pulleys, and transmission belt 302, effectively preventing accidental injury to operators and improving production safety. It also prevents external dust and impurities from entering the mixing system.

[0026] As shown in Figures 1 and 3, a protective cover 305 is also provided above the top cover 102. The protective cover 305 completely covers the synchronous pulley 301, the transmission belt 302, the main drive motor 303 and the gear reduction assembly 304. A fixing plate 306 is provided at the bottom side of the protective cover 305. The fixing plate 306 is provided with fixing bolts 307 for connecting with the top cover 102.

[0027] As shown in Figures 1 and 3, the top cover 102 is also equipped with a feed hopper 112 and an exhaust pipe 113. The feed hopper 112 is also equipped with a feed valve 114, and the exhaust pipe 113 is also equipped with an exhaust valve 115. The bottom of the mixing tank 101 is also equipped with a discharge pipe 116, and the discharge pipe 116 is equipped with a discharge valve 117. The bottom of the mixing tank 101 is also equipped with a support leg 118. The device is equipped with a feed hopper 112, an exhaust pipe 113, a discharge pipe 116, and corresponding valves, realizing fully controllable operation of feeding, venting (discharging the gas generated during mixing or maintaining pressure balance), and discharging, meeting the needs of continuous or batch industrial production.

[0028] A temperature sensor is also installed on the inner wall of the mixing tank 101, and a temperature controller electrically connected to the electric heating device and the temperature sensor is also installed on the mixing tank 101.

[0029] As shown in Figure 1, the top cover 102 is snapped onto the mixing tank 101. A clamping washer adapted to the mixing tank 101 is provided on the top and bottom walls of the top cover 102, and fastening bolts 119 are provided on the top cover 102 for screwing and fixing the mixing tank 101. The top cover 102 adopts a detachable design (snap-fit ​​and bolted), which facilitates thorough cleaning, inspection, and replacement of parts inside the mixing tank 101, reducing maintenance costs.

[0030] The working principle of this lithium battery electrolyte production device is based on the synergistic effect of mechanical composite motion and intelligent temperature control, achieving efficient and uniform mixing of materials by constructing a three-dimensional flow field. The specific principle is as follows: 1. Drive and Transmission Principle: Horizontal Rotary Drive System: After opening the feed valve 114 and adding raw materials to the mixing tank 101 through the feed hopper 112, the feed valve 114 can be closed, allowing the main drive motor 303 to start. The power is amplified and reduced in speed by the gear reduction assembly 304 and transmitted to one of the stirring shafts 104. The synchronous pulley 301 at the top of this shaft rotates, driving the synchronous pulleys 301 on all the surrounding stirring shafts 104 to rotate synchronously via the closed transmission belt 302. This parallel transmission method ensures that all stirring shafts 104 rotate at the exact same speed and direction, generating a stable horizontal shear flow field.

[0031] Vertical reciprocating drive system: A telescopic push rod 202 (such as an electric cylinder or pneumatic cylinder) serves as the power source, and its output shaft performs linear telescopic motion, driving the central agitator shaft 103 and the spoiler disk 106 to perform up-and-down reciprocating motion via the transmission connecting plate 203. During the vertical motion, the T-shaped slider 206 on the transmission connecting plate 203 slides within the T-shaped guide groove 205 of the mounting bracket 201. Utilizing the geometric constraints of the T-shaped structure, the agitator shaft 103 is forcibly restricted from circumferential rotation, ensuring that it only performs precise linear reciprocating motion along the axial direction, preventing mechanical jamming or deviation in the motion trajectory due to torsion.

[0032] 2. Multidimensional Mixed Flow Field Construction Principle: The device creates a complex turbulent flow field in the mixing tank 101 through the superposition of two motions: horizontal shearing and circumferential flow. Multiple stirring shafts 104 drive the blade assembly to rotate at high speed, generating strong radial and tangential shear forces on the electrolyte raw material, causing the material to spread and circulate rapidly on the horizontal plane, breaking up large agglomerates.

[0033] Vertical flow and turbulence: During the lifting and lowering process, the central turbulence plate 106 plays a dual role as a "piston" and a "screen": Forced convection: When the turbulence plate 106 moves up and down, it forces the liquid below the plate to spray upward through the through hole 107 and the liquid passage hole 108, or causes the liquid above to fill downward, forming intense axial convection and eliminating the stratification between the upper and lower parts.

[0034] Secondary breakup: When the liquid flows through the first turbulence bar 109 and the second turbulence bar 110 in the liquid passage 108, the change in the flow channel cross section generates local high turbulence and vortices, further refining the droplets or particles and accelerating the dissolution and dispersion of lithium salt in the solvent.

[0035] Dynamic matching: The position of the through hole 107 on the turbulence plate 106 is adapted to the rotating stirring blade assembly 105 (usually designed to be staggered or avoid each other), so that the rotating blades can continuously cut the liquid flow through the hole, greatly enhancing the randomness and uniformity of mixing.

[0036] 3. Self-cleaning and anti-wall-sticking principle: Mechanical scraping. The scraper ring 111 on the side of the baffle 106 is in close contact with the inner wall of the mixing tank 101. As the baffle 106 moves up and down, it continuously scrapes away high-viscosity materials or undissolved powders adhering to the tank wall, pushing them back into the mainstream zone to participate in mixing. This not only prevents materials from coking due to uneven heating over a long period of time, but also ensures the accuracy of the formula ratio.

[0037] 4. Intelligent temperature control principle with closed-loop feedback: The temperature sensor collects the temperature signal of the electrolyte in the tank in real time and transmits it to the temperature controller. The temperature controller compares the measured value with the set process temperature: if the measured temperature is lower than the set value, the temperature controller turns on the power of the electric heating device to heat; if it reaches or exceeds the set value, it cuts off or reduces the heating power.

[0038] This process utilizes an electric heating device to directly transfer heat inside the side wall, combined with heat convection generated by stirring, to quickly achieve a uniform temperature inside the tank, meeting the stringent temperature sensitivity requirements in electrolyte production.

[0039] 5. Safety and Sealing Principle: Physical Isolation: The protective cover 305 completely encloses all high-speed rotating parts (belts, pulleys) and reciprocating parts (push rod connections) at the top, using physical barriers to block the risk of personnel contact, while preventing external dust from entering the clean mixing chamber.

[0040] Airtight operation: Through the sequential control of the feed valve 114, exhaust valve 115 and discharge valve 117, and in conjunction with the removable and sealed top cover 102, the system can operate in a closed or slightly positive pressure state to prevent the electrolyte solvent from evaporating or reacting with moisture in the air, thus ensuring product purity.

[0041] In summary, this device, through the organic combination of four physical mechanisms—rotational shearing, axial flow, disturbance and crushing, and wall scraping and renewal—along with precise temperature control, fundamentally solves the problems of mixing dead zones, uneven dispersion, and wall adhesion inherent in traditional single stirring methods, thus achieving high-quality production of lithium battery electrolyte.

[0042] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A production apparatus for lithium battery electrolyte, comprising a mixing tank (101), characterized in that: An electric heating device is provided inside the side wall of the mixing tank (101). A top cover (102) is detachably provided on the top of the mixing tank (101). A stirring shaft (103) capable of vertical lifting is provided on the top cover (102). A plurality of stirring shafts (104) distributed around the stirring shaft (103) are also provided on the top cover (102). A stirring blade assembly (105) is provided on the stirring shaft (104). A baffle plate (106) sleeved on the outside of the stirring blade assembly (105) is provided on the stirring shaft (103). A through hole (107) adapted to the stirring blade assembly (105) is provided on the baffle plate (106).

2. The lithium battery electrolyte production apparatus as described in claim 1, characterized in that: The turbulence plate (106) is also provided with a plurality of liquid passage holes (108), and a first turbulence rod (109) located in the liquid passage holes (108) is provided on the turbulence plate (106). A second turbulence rod (110) located in the through hole (107) and offset from the stirring blade assembly (105) is also provided on the turbulence plate (106). A scraper ring plate (111) that fits against the inner wall of the mixing tank (101) is also provided on the side end of the turbulence plate (106).

3. The lithium battery electrolyte production apparatus as described in claim 2, characterized in that: The top cover (102) is provided with a mounting bracket (201), and a telescopic push rod (202) is vertically provided on the mounting bracket (201). The lower end of the output shaft of the telescopic push rod (202) is connected to the stirring shaft (103) through a transmission connecting plate (203). The top cover (102) is provided with a connecting sleeve (204) that is slidably connected to the stirring shaft (103). A T-shaped guide groove (205) is provided on the side of the mounting bracket. A T-shaped slider (206) is provided on the transmission connecting plate (203) that is slidably engaged with it to guide the vertical reciprocating motion of the transmission connecting plate (203) and the stirring shaft (103).

4. The lithium battery electrolyte production apparatus as described in claim 3, characterized in that: The stirring shaft (104) is rotatably supported on the top cover (102) by bearing seats; each stirring shaft (104) is equipped with a synchronous pulley (301) at its upper end, and all synchronous pulleys (301) are connected in series by a closed transmission belt (302); the top cover (102) is also equipped with a main drive motor (303), and the output shaft of the main drive motor (303) is connected to one of the stirring shafts (104) through a gear reduction assembly (304) to drive all stirring shafts (104) to rotate synchronously.

5. The lithium battery electrolyte production apparatus as described in claim 4, characterized in that: A protective cover (305) is also provided above the top cover (102). The protective cover (305) completely covers the synchronous pulley (301), transmission belt (302), main drive motor (303) and gear reduction assembly (304). A fixing plate (306) is provided at the bottom side of the protective cover (305). The fixing plate (306) is provided with fixing bolts (307) for connecting with the top cover (102).

6. The lithium battery electrolyte production apparatus as described in claim 5, characterized in that: The top cover (102) is also provided with a feed hopper (112) and an exhaust pipe (113). The feed hopper (112) is also provided with a feed valve (114). The exhaust pipe (113) is also provided with an exhaust valve (115). The bottom of the mixing tank (101) is also provided with a discharge pipe (116). The discharge pipe (116) is provided with a discharge valve (117). The bottom of the mixing tank (101) is also provided with a support leg (118).

7. The lithium battery electrolyte production apparatus as described in claim 6, characterized in that: A temperature sensor is also provided on the inner wall of the mixing tank (101), and a temperature controller electrically connected to the electric heating device and the temperature sensor is also provided on the mixing tank (101).

8. The lithium battery electrolyte production apparatus according to any one of claims 1-7, characterized in that: The top cover (102) is snapped into the mixing tank (101). The top and bottom walls of the top cover (102) are provided with a pressure washer that is compatible with the mixing tank (101). The top cover (102) is provided with fastening bolts (119) for screwing and fixing the mixing tank (101).

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