Electrolyte preparation system and battery preparation integrated system

Abstract

The utility model provides a kind of electrolyte preparation system and battery preparation overall system, including liquid salt magnetic preparation kettle, liquid salt buffer tank, electrolyte magnetic preparation kettle and electrolyte buffer tank connected in turn by conveying pipeline;The outer surface of liquid salt magnetic preparation kettle and electrolyte magnetic preparation kettle is equipped with temperature control jacket device for temperature control of preparation kettle internal material.The utility model is prepared in advance by liquid salt and the application of temperature control jacket device, not only greatly improves the efficiency and capacity of electrolyte preparation, but also optimizes the dissolution process of lithium hexafluorophosphate, ensures the stability and reliability of preparation process.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to an electrolyte preparation system and an overall battery preparation system. Background Technology

[0002] In the field of battery manufacturing, the electrolyte, as a crucial component within the battery, directly impacts its charge-discharge efficiency, safety, and lifespan. The primary function of the electrolyte is to provide pathways for ion transport within the battery, ensuring efficient electrochemical reactions during charge and discharge. Therefore, electrolyte preparation technology is of paramount importance for improving battery performance. With the continuous development of battery technology, the performance requirements for electrolytes are constantly increasing, especially in areas such as high energy density, high safety, and rapid charge-discharge, prompting continuous optimization and innovation in related technologies.

[0003] Currently, existing electrolyte preparation technologies typically involve adding a low-water solvent, a solvent, a lithium salt, and additives sequentially according to a formula ratio. For example, to prepare a 10m... 3 Taking the electrolyte as an example, an ester solvent is first added. Then, while stirring, the solvent temperature is lowered to 0°C, and the electrolyte temperature is controlled between 0°C and 10°C. Lithium salt is then slowly added. Taking lithium hexafluorophosphate as an example, when the amount added is 1200 kg, the dissolution process takes approximately 4 to 5 hours. After the lithium salt is completely dissolved, additives are added, and the solution undergoes multi-stage filtration before finally entering an automated filling system for packaging. This preparation process can, to a certain extent, meet the basic production requirements of electrolytes.

[0004] However, existing technologies have several drawbacks in practical applications. First, the electrolyte preparation process requires separate temperature treatment of the solvent, which not only increases the complexity of the process but also prolongs the entire production cycle. For example, before adding lithium salts, the solvent temperature needs to be lowered to 0°C, a process that consumes a significant amount of time and energy. Second, lithium salts have a long dissolution time; for example, lithium hexafluorophosphate takes approximately 4 to 5 hours to dissolve, further limiting the improvement of production efficiency. Furthermore, while multi-stage filtration ensures the purity of the electrolyte, it also increases production costs. These shortcomings pose numerous challenges to the large-scale production of existing technologies.

[0005] In summary, existing electrolyte preparation technologies suffer from drawbacks such as long preparation times, the need for separate temperature treatments, and cumbersome processing methods, indirectly increasing production costs. These issues not only limit the improvement of electrolyte production efficiency but also increase production costs for enterprises, impacting the overall development of the battery manufacturing industry. Therefore, it is urgent to improve existing technologies to increase electrolyte production efficiency, reduce production costs, and thus promote the further development of battery manufacturing technology. Utility Model Content

[0006] The purpose of this application is to provide an electrolyte preparation system and a battery manufacturing system to solve the technical problems existing in the prior art, such as long preparation time, the need for separate temperature treatment, cumbersome processing methods, and indirect increase in production costs.

[0007] In a first aspect, this utility model provides an electrolyte preparation system, comprising a liquid salt magnetic preparation vessel, a liquid salt buffer tank, an electrolyte magnetic preparation vessel, and an electrolyte buffer tank connected in sequence via a delivery pipeline;

[0008] The outer surfaces of the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel are provided with temperature control jacket devices for controlling the temperature of the materials inside the preparation vessel.

[0009] In an optional embodiment, the temperature control jacket device includes a jacket body and a refrigerant circulation pipeline connected to the jacket body.

[0010] In an optional embodiment, the electrolyte preparation system further includes a heat exchange circulation device;

[0011] The heat exchange circulation device is connected to the liquid salt magnetic preparation vessel and is used to cool the lithium hexafluorophosphate in the liquid salt magnetic preparation vessel using a circulating refrigerant.

[0012] In an optional embodiment, the heat exchange circulation device includes a heat exchanger, a material feed pipe and a material discharge pipe for lithium hexafluorophosphate circulation and connected to both the liquid salt magnetic mixing vessel and the heat exchanger, and a refrigerant inlet and a refrigerant outlet provided on the heat exchanger for refrigerant circulation; the heat exchanger, the material feed pipe, the material discharge pipe and the liquid salt magnetic mixing vessel form a closed loop for lithium hexafluorophosphate material flow.

[0013] In an optional embodiment, the liquid salt magnetic mixing vessel and the liquid salt buffer tank are connected via a first discharge pipeline; the material inlet pipeline is connected to the first discharge pipeline;

[0014] The electrolyte preparation system also includes a liquid salt preparation vessel discharge pump; the liquid salt preparation vessel discharge pump is located on the first discharge pipeline;

[0015] The electrolyte preparation system also includes a filtration device; the first discharge pipe is equipped with a first filter from the filtration device.

[0016] In an optional embodiment, the liquid salt buffer tank and the electrolyte magnetic preparation vessel are connected via a second discharge pipeline;

[0017] The electrolyte preparation system also includes a liquid salt buffer tank discharge pump; the liquid salt buffer tank discharge pump is connected to the second discharge pipeline.

[0018] In an optional embodiment, the electrolyte magnetic preparation vessel and the electrolyte buffer tank are connected by a third discharge pipeline; and the electrolyte buffer tank is further provided with a final product discharge pipeline.

[0019] The electrolyte preparation system further includes a second filter located on the third discharge pipeline and a third filter located on the final product discharge pipeline.

[0020] In an optional embodiment, both the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel include a stirring shaft and stirring blades located at the bottom end of the stirring shaft.

[0021] In an optional embodiment, the electrolyte preparation system further includes a movable cooling device disposed in the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel;

[0022] The movable cooling device includes a cooling base and cooling units connected to the cooling base in ascending order of size;

[0023] Both the cooling base and the cooling unit are annular structures and are fitted onto the stirring shaft; both the cooling base and the cooling unit contain circulating refrigerant.

[0024] The cooling base can move up and down along the length of the stirring shaft;

[0025] The cooling unit can expand upwards based on the cooling base to form a cooling tower structure that is narrowed from top to bottom.

[0026] Secondly, this utility model provides an overall battery manufacturing system, including an electrolyte preparation system as described in any of the foregoing embodiments.

[0027] The electrolyte preparation system provided by this invention enables the pre-preparation of lithium hexafluorophosphate liquid salt by using a magnetically operated liquid salt preparation vessel. This improvement makes the electrolyte preparation process more efficient because the dissolution time of lithium hexafluorophosphate in traditional processes is relatively long, typically requiring 4 to 5 hours. By pre-preparing the liquid salt, the overall electrolyte preparation time can be significantly shortened. According to actual application data, the efficiency of electrolyte preparation in the preparation vessel can be increased by more than 50% after adopting this system, thereby significantly increasing production capacity and meeting the needs of large-scale production.

[0028] Secondly, the temperature-controlled jacket devices on the outer surfaces of the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel in the system provide precise temperature control for the preparation of lithium hexafluorophosphate liquid salt. In traditional processes, the dissolution of lithium hexafluorophosphate requires lowering the solvent temperature to 0°C and strictly controlling the electrolyte temperature between 0°C and 10°C. This process is not only cumbersome but also prone to a decrease in the dissolution rate due to inaccurate temperature control. The use of temperature-controlled jacket devices ensures that the liquid salt dissolves rapidly under suitable low-temperature conditions, thereby significantly improving the dissolution rate of lithium hexafluorophosphate and making the temperature of the liquid salt easier to control, further optimizing the preparation process.

[0029] In summary, this invention, through the pre-preparation of liquid salt and the application of a temperature-controlled jacket device, not only significantly improves the efficiency and capacity of electrolyte preparation but also optimizes the dissolution process of lithium hexafluorophosphate, ensuring the stability and reliability of the preparation process. These improvements have significant application value in actual production and can effectively enhance the overall performance and economic benefits of electrolyte production. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure and pipeline connection of the electrolyte preparation system provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the liquid salt magnetic mixing vessel in the electrolyte preparation system provided in this embodiment of the utility model;

[0033] Figure 3 A schematic diagram of the heat exchange circulation device in the electrolyte preparation system provided in this embodiment of the utility model;

[0034] Figure 4 A schematic diagram (planar view) of the movable cooling device in the electrolyte preparation system provided in this embodiment of the utility model;

[0035] Figure 5 A schematic diagram (unfolded state) of the movable cooling device in the electrolyte preparation system provided in this embodiment of the utility model;

[0036] Figure 6 An exploded view of the movable cooling device in the electrolyte preparation system provided in this embodiment of the utility model.

[0037] Reference numerals in the attached diagram: 100-Electrolyte preparation system; 1-Liquid salt magnetic preparation vessel; 11-Stirring shaft; 12-Stirring blade; 2-Liquid salt buffer tank; 3-Electrolyte magnetic preparation vessel; 4-Electrolyte buffer tank; 5-Temperature control jacket device; 51-Jacket body; 52-Refrigerant circulation pipeline; 6-Heat exchange circulation device; 61-Heat exchanger; 62-Material feed pipeline; 63-Material discharge pipeline; 64-Refrigerant inlet; 65-Refrigerant outlet; 7-Conveying pipeline; 71-First discharge pipeline; 72-Second discharge pipeline; 73-Third discharge pipeline; 8-Filter device; 81-First filter; 82-Second filter; 83-Third filter; 9-Mobile cooling device; 91-Cooling base; 92-Cooling unit. Detailed Implementation

[0038] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0039] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0040] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following reference Figures 1 to 4 This invention describes an electrolyte preparation system 100 according to some embodiments of the present invention.

[0044] See Figure 1 As shown, in this embodiment, an electrolyte preparation system 100 is provided, including a liquid salt magnetic preparation vessel 1, a liquid salt buffer tank 2, an electrolyte magnetic preparation vessel 3, and an electrolyte buffer tank 4 connected in sequence through a conveying pipeline 7; wherein, the outer surfaces of the liquid salt magnetic preparation vessel 1 and the electrolyte magnetic preparation vessel 3 are provided with a temperature control jacket device 5 for controlling the temperature of the materials inside the preparation vessel.

[0045] The electrolyte preparation system 100 provided in this embodiment aims to optimize the electrolyte production process and improve production efficiency and product quality. The system consists of several key components, and through a rational process layout and functional design, it achieves efficient electrolyte preparation.

[0046] The core components of the system include a liquid salt magnetic mixing vessel 1, a liquid salt buffer tank 2, an electrolyte magnetic mixing vessel 3, and an electrolyte buffer tank 4. These components are connected sequentially via pipelines to form a continuous production process.

[0047] The liquid salt magnetic mixing vessel 1 is one of the key components of the system, and its main function is to prepare liquid lithium hexafluorophosphate salt. By pre-preparing lithium hexafluorophosphate into liquid salt, the time for subsequent electrolyte preparation can be effectively shortened, thereby significantly improving the overall production efficiency of the system. Actual testing shows that using this system can increase electrolyte preparation capacity by more than 50%, providing strong support for large-scale industrial production.

[0048] The liquid salt magnetic mixing vessel 1 can also be equipped with multiple material and gas input pipelines for inputting protective gas, oxygen, lithium hexafluorophosphate (in the lithium hexafluorophosphate metering chamber), and low-water DMC.

[0049] The preparation process may include:

[0050] (1) The lithium hexafluorophosphate (LiPF6) of the hexafluoro unit is fed into the lithium hexafluorophosphate (LiPF6) metering chamber through the air conveying system.

[0051] (2) The low-water DMC is added to the liquid salt magnetic mixing vessel 1 in proportion by the discharge pump of the DMC low-water buffer tank;

[0052] (3) After the DMC low water is added, a certain amount of lithium hexafluorophosphate (LiPF6) is added to the liquid salt magnetic mixing vessel 1 and stirred and mixed.

[0053] The aforementioned low-water DMC refers to a product form of dimethyl carbonate (DMC) with extremely low water content. DMC is a colorless, transparent, slightly odorous liquid characterized by low toxicity, environmental friendliness, and good chemical stability. Low-water DMC ensures its performance and safety in specific applications by strictly controlling its water content, typically below 30 ppm.

[0054] The liquid salt buffer tank 2 is used to temporarily store the liquid salt prepared from the liquid salt magnetic mixing vessel 1, ensuring that the liquid salt can be stably and uniformly supplied to the subsequent electrolyte preparation process. This buffering element not only improves the continuity of production, but also provides the system with the necessary flexibility to cope with potential fluctuations in the production process.

[0055] The electrolyte magnetic mixing vessel 3 is the device used for the final preparation of the electrolyte in the system. It ensures the quality and performance of the electrolyte meet requirements by precisely controlling the mixing ratio and stirring conditions of various raw materials. Similar to the liquid salt magnetic mixing vessel 1, the outer surface of the electrolyte magnetic mixing vessel 3 is also equipped with a temperature control jacket 5. This design enables precise temperature control of the materials inside the mixing vessel, thereby optimizing the dissolution process of lithium hexafluorophosphate. Through jacket cooling, the dissolution rate of lithium hexafluorophosphate is significantly improved, and the temperature of the liquid salt is also easier to control, further enhancing the stability and reliability of the system.

[0056] Finally, the electrolyte buffer tank 4 is used to store the prepared and mixed electrolyte, ensuring that the electrolyte achieves ideal uniformity and stability before entering subsequent packaging or use stages. This buffer tank design also provides a buffer for the overall operation of the system, avoiding the impact on product quality caused by equipment downtime or process adjustments.

[0057] In summary, the electrolyte preparation system 100 in this embodiment achieves efficient and high-quality electrolyte production through the pre-preparation of liquid salt, precise temperature control by the temperature-controlled jacket device 5, and stable storage by the buffer tank. This structural design not only optimizes the production process but also significantly improves production efficiency and product quality, providing an innovative solution for the electrolyte manufacturing field.

[0058] Further reference Figure 2The temperature control jacket device 5 includes a jacket body 51 and a refrigerant circulation pipeline 52 connected to the jacket body 51.

[0059] As described above, the temperature control jacket device 5 includes a jacket body 51 and a refrigerant circulation pipeline 52 connected to the jacket body 51. This design achieves precise temperature control of the materials inside the preparation vessel through the circulation of refrigerant within the jacket. The jacket body 51, as the outer structure for heat exchange, fits tightly against the outer wall of the preparation vessel, efficiently transferring the temperature of the refrigerant to the internal materials. The refrigerant circulation pipeline 52 is responsible for introducing and discharging the refrigerant into and out of the jacket. By adjusting the flow rate and temperature of the refrigerant, the temperature changes of the materials inside the preparation vessel can be flexibly controlled.

[0060] The application of this temperature control jacket device 5 can effectively improve the accuracy and stability of temperature control during electrolyte preparation, thereby optimizing the dissolution process of materials such as lithium hexafluorophosphate and ensuring the quality of electrolyte and production efficiency.

[0061] Further reference Figure 3 The electrolyte preparation system 100 also includes a heat exchange circulation device 6;

[0062] The heat exchange circulation device 6 is connected to the liquid salt magnetic preparation vessel 1 and is used to cool the lithium hexafluorophosphate in the liquid salt magnetic preparation vessel 1 using a circulating refrigerant.

[0063] The electrolyte preparation system 100 also includes a heat exchange circulation device 6, which is connected to the liquid salt magnetic mixing vessel 1 and is specifically used to cool the lithium hexafluorophosphate in the liquid salt magnetic mixing vessel 1. By circulating a refrigerant, the heat exchange circulation device 6 can efficiently reduce the temperature of the lithium hexafluorophosphate solution to the required process range. This cooling method not only improves the accuracy of temperature control but also effectively shortens the dissolution time of lithium hexafluorophosphate, thereby improving the efficiency of the entire preparation process.

[0064] The introduction of the heat exchange circulation device 6 allows the system to more flexibly respond to different temperature requirements when processing lithium hexafluorophosphate. For example, during the dissolution process of lithium hexafluorophosphate, continuous cooling through circulating refrigerant can prevent decomposition or impurity generation caused by excessive temperature, while ensuring the stability and uniformity of the dissolution process. In addition, this circulating cooling method can also reduce the impact of temperature fluctuations on equipment and product quality, and further optimize the electrolyte preparation process.

[0065] In this embodiment, during the preparation of lithium hexafluorophosphate liquid salt, a dual heat exchange method combining jacketed cooling and cooling via a heat exchange circulation device 6 is employed, which significantly improves the dissolution rate of lithium hexafluorophosphate. Jacketed cooling, through a temperature-controlled jacket device 5 installed on the outer surface of the preparation vessel, directly and precisely controls the temperature of the material inside the vessel, ensuring the dissolution process takes place under suitable low-temperature conditions, thereby accelerating the dissolution rate of lithium hexafluorophosphate. Simultaneously, the cooling via the heat exchange circulation device 6 utilizes a circulating refrigerant to further enhance heat transfer and removal, providing a more stable low-temperature environment for the dissolution process. This dual heat exchange method not only improves dissolution efficiency but also, through synergistic effects, ensures that the temperature of the liquid salt is easier to control, avoiding incomplete dissolution or impurity generation due to temperature fluctuations, thereby optimizing the entire preparation process and improving the quality and production efficiency of the liquid salt.

[0066] Furthermore, the heat exchange circulation device 6 includes a heat exchanger 61, a material feed pipe 62 and a material discharge pipe 63 for lithium hexafluorophosphate circulation and connected to both the liquid salt magnetic preparation vessel 1 and the heat exchanger 61, and a refrigerant inlet 64 and a refrigerant outlet 65 provided on the heat exchanger 61 for refrigerant circulation; the heat exchanger 61, the material feed pipe 62, the material discharge pipe 63 and the liquid salt magnetic preparation vessel 1 form a closed loop for lithium hexafluorophosphate material flow.

[0067] The heat exchange circulation device 6 includes a heat exchanger 61, a material feed pipe 62, a material discharge pipe 63, and a refrigerant inlet 64 and a refrigerant outlet 65 for refrigerant circulation. The heat exchanger 61 is the core component of the system; its function is to cool the solution through heat exchange between the refrigerant and the lithium hexafluorophosphate solution. The material feed pipe 62 and the material discharge pipe 63 are respectively connected to the liquid salt magnetic mixing vessel 1 and the heat exchanger 61, forming a closed-loop material flow path. This closed-loop design ensures that the lithium hexafluorophosphate solution can continuously circulate during the cooling process, avoiding localized overheating or uneven temperature distribution.

[0068] The refrigerant inlet 64 and refrigerant outlet 65 are used for the circulation of the refrigerant. By adjusting the temperature and flow rate of the refrigerant, the cooling rate of the lithium hexafluorophosphate solution is precisely controlled. This design not only improves the dissolution rate of lithium hexafluorophosphate, but also ensures that the temperature of the liquid salt is easier to control through dual heat exchange methods (jacketed cooling and heat exchanger 61 cooling), thereby optimizing the entire preparation process.

[0069] Furthermore, the liquid salt magnetic mixing vessel 1 and the liquid salt buffer tank 2 are connected via a first discharge pipe 71; the material inlet pipe 62 is connected to the first discharge pipe 71. The electrolyte preparation system 100 also includes a liquid salt mixing vessel discharge pump; the liquid salt mixing vessel discharge pump is located on the first discharge pipe 71. The electrolyte preparation system 100 also includes a filtration device 8; the first discharge pipe 71 is equipped with a first filter 81 from the filtration device 8.

[0070] The liquid salt magnetic mixing vessel 1 and the liquid salt buffer tank 2 are connected by a first discharge pipe 71. This connection ensures smooth transfer of liquid salt from the mixing vessel to the buffer tank. Furthermore, the material feed pipe 62 of the heat exchange circulation device 6 is connected to the first discharge pipe 71, allowing the lithium hexafluorophosphate solution to directly enter the liquid salt buffer tank 2 after heat exchange and cooling, further optimizing the material flow path.

[0071] The system is equipped with a liquid salt preparation vessel discharge pump on the first discharge pipeline 71. Its function is to provide power for the transport of liquid salt, ensuring that the material can be transferred efficiently and stably from the liquid salt magnetic preparation vessel 1 to the liquid salt buffer tank 2. This configuration not only improves the efficiency of material transfer, but also reduces the flow instability problems that may be caused by gravity transport.

[0072] A first filter 81 is also installed on the first discharge pipe 71, the main function of which is to remove impurities and particles that may be present in the liquid salt solution. This filtration process is crucial to ensuring the purity and quality of the electrolyte, especially during the dissolution of lithium hexafluorophosphate. The filter can effectively prevent impurities from entering subsequent processes, thereby improving the performance of the final product.

[0073] Furthermore, the liquid salt buffer tank 2 is connected to the electrolyte magnetic preparation vessel 3 via a second discharge pipe 72; the electrolyte preparation system 100 also includes a liquid salt buffer tank 2 discharge pump; the liquid salt buffer tank 2 discharge pump is connected to the second discharge pipe 72.

[0074] The liquid salt buffer tank 2 and the electrolyte magnetic preparation vessel 3 are connected via a second discharge pipe 72. This connection ensures that the liquid salt is smoothly and efficiently transferred from the buffer tank to the electrolyte magnetic preparation vessel 3, providing a stable material supply for subsequent electrolyte preparation. A discharge pump for the liquid salt buffer tank 2 is installed on the second discharge pipe 72. This pump provides power for the transport of the liquid salt, ensuring that the material can be transferred from the buffer tank to the electrolyte magnetic preparation vessel 3 at a stable flow rate. This setup not only improves the efficiency of material transport but also reduces the potential for flow instability caused by gravity transport.

[0075] By incorporating a second discharge pipeline 72 and a discharge pump, the system can better control the delivery process of liquid salt, avoiding a decrease in preparation efficiency due to insufficient or unstable flow. Simultaneously, this design supports the automation and continuous production of the entire electrolyte preparation system 100.

[0076] Furthermore, the electrolyte magnetic preparation vessel 3 and the electrolyte buffer tank 4 are connected by a third discharge pipe 73; and the electrolyte buffer tank 4 is also provided with a final product discharge pipe.

[0077] The electrolyte preparation system 100 also includes a second filter 82 disposed on the third discharge pipeline 73 and a third filter 83 disposed on the final product discharge pipeline.

[0078] The electrolyte magnetic mixing vessel 3 and the electrolyte buffer tank 4 are connected by a third discharge pipe 73. This connection method ensures that the prepared electrolyte can be smoothly transferred to the buffer tank for temporary storage. In addition, the electrolyte buffer tank 4 is also equipped with a final product discharge pipe for outputting the final electrolyte product to subsequent processes or packaging stages.

[0079] The system is equipped with a second filter 82 on the third discharge pipeline 73. Its function is to further remove any impurities and particles that may be present during the transfer of the electrolyte from the preparation vessel to the buffer tank, ensuring the purity of the electrolyte. In addition, a third filter 83 is also provided on the final product discharge pipeline for a final filtration of the electrolyte before final output, thereby ensuring the quality of the final product.

[0080] By installing filters in key transmission lines, this system effectively prevents impurities from entering subsequent processes, reducing problems such as electrolyte performance degradation or battery instability caused by impurities. This design not only improves the purity of the electrolyte but also supports the automation and continuous production of the entire formulation system.

[0081] Furthermore, both the liquid salt magnetic preparation vessel 1 and the electrolyte magnetic preparation vessel 3 include a stirring shaft 11 and stirring blades 12 located at the bottom end of the stirring shaft 11.

[0082] Both the liquid salt magnetic mixing vessel 1 and the electrolyte magnetic mixing vessel 3 include a stirring shaft 11 and stirring blades 12 located at the bottom of the stirring shaft 11. The stirring device is a key component in the mixing vessel used to mix materials. Its function is to ensure that the liquid lithium hexafluorophosphate salt or electrolyte can be fully mixed during the preparation process to achieve uniform dissolution and dispersion.

[0083] In the liquid salt magnetic mixing vessel 1, the stirring device, through the rotation of the stirring shaft 11 and the stirring blades 12, ensures that lithium hexafluorophosphate comes into full contact with the solvent, accelerating the dissolution process. This stirring method can effectively reduce dissolution time and improve preparation efficiency.

[0084] In the magnetic electrolyte preparation vessel 3, the stirring device serves to uniformly mix the liquid salt with other electrolyte components (such as solvents and additives) to ensure the consistency and stability of the electrolyte's performance. The design and rotation speed of the stirring blades 12 can be optimized according to the characteristics of different materials to achieve the best mixing effect.

[0085] Magnetic drive systems transmit power via magnetic fields, avoiding the leakage problems that can occur with mechanical seals. They are particularly suitable for handling volatile or toxic chemicals, such as lithium hexafluorophosphate. The simple structure of magnetic drive systems reduces wear on mechanical parts and lowers maintenance costs. Furthermore, magnetic drive systems can operate in confined environments, minimizing operator contact with hazardous chemicals and improving operational safety.

[0086] Further reference Figure 4 The electrolyte preparation system 100 further includes a movable cooling device 9 disposed in the liquid salt magnetic preparation vessel 1 and the electrolyte magnetic preparation vessel 3;

[0087] The movable cooling device 9 includes a cooling base 91 and cooling units 92 connected to the cooling base 91 and arranged in ascending order of size;

[0088] Both the cooling base 91 and the cooling unit 92 are annular structures and are both sleeved on the stirring shaft 11; both the cooling base 91 and the cooling unit 92 are provided with circulating refrigerant.

[0089] The cooling base 91 can move up and down along the length of the stirring shaft 11;

[0090] The cooling unit 92 can expand upwards based on the cooling base 91 to form a cooling tower structure that is narrowed from top to bottom.

[0091] In this embodiment, the movable cooling device 9 is installed in the liquid salt magnetic preparation vessel 1 and the electrolyte magnetic preparation vessel 3, and specifically includes the following components:

[0092] The cooling base 91 serves as the support structure for the entire cooling device. The cooling base 91 is ring-shaped and is fitted onto the stirring shaft 11, allowing it to move up and down along the length of the stirring shaft 11.

[0093] The cooling units 92 are connected in ascending order of size, and this structure can have two different states:

[0094] (1) Planar state (reference) Figure 4 When not deployed, multiple cooling units 92 and cooling base 91 form a plane.

[0095] (2) Expanded state (reference) Figure 5 When unfolded, it forms a cooling tower structure that is constricted from top to bottom. In the cooling tower structure, the upper cooling unit 92 has the largest plane diameter, while the lower cooling unit 92 has a relatively smaller plane diameter, thus forming a constricted structure that is larger at the top and smaller at the bottom, with the lowest end being the cooling base 91.

[0096] Each cooling unit 92 is annular, fitted onto the stirring shaft 11, and connected to the cooling base 91 (see exploded view). Figure 6 ).

[0097] Both the cooling base 91 and the cooling unit 92 are equipped with refrigerant circulation channels, in which the refrigerant circulates and carries away heat.

[0098] The cooling unit 92 can be controllably expanded upwards from the cooling base 91 to form a structure similar to a cooling tower. The vertical movement of the cooling base 91 causes the cooling unit 92 to expand or contract, thereby adjusting the cooling area. The vertical position of the cooling unit 92 and whether it is expanded can be selectively controlled according to the amount of material fed into it, thus enabling more flexible and efficient temperature control of the material.

[0099] The refrigerant circulating in the cooling base 91 and cooling unit 92 removes heat from the materials inside the preparation vessel through heat exchange, thus lowering the temperature. The circulating flow of the refrigerant ensures continuous heat removal.

[0100] A cooling device is mounted on the stirring shaft 11 and works in conjunction with the stirring blades 12. The stirring blades 12 promote material mixing by rotating, while the cooling device cools the material in real time during the mixing process to ensure accurate temperature control.

[0101] Through the design of the cooling tower structure, the cooling device can provide a larger cooling area, significantly improving heat dissipation efficiency. The refrigerant circulation system further enhances the cooling effect, ensuring the stability of the material temperature inside the preparation vessel. The mobility of the cooling device allows it to flexibly adjust the cooling intensity according to the temperature and volume of the material inside the preparation vessel. The vertical movement of the cooling base 91 and the expansion or contraction of the cooling unit 92 enable the cooling device to adapt to different working conditions. During the preparation of lithium hexafluorophosphate liquid salt, the cooling device can rapidly reduce the temperature and accelerate the dissolution rate, thereby improving preparation efficiency. Furthermore, the design of the refrigerant circulation system reduces the demand for additional energy during the cooling process, while avoiding material decomposition or waste due to excessive temperature, thus reducing production costs.

[0102] In summary, the portable cooling device 9, through its innovative structural design and efficient cooling principle, significantly improves the temperature control performance of the electrolyte preparation system 100, thereby optimizing production efficiency and product quality.

[0103] A specific implementation of the movable cooling device 9 may include, for example, the following:

[0104] The cooling base 91 is a ring-shaped structure, fitted onto the stirring shaft 11. The base has a refrigerant circulation channel inside for cooling the material surrounding the stirring shaft 11. Cooling units 92 are connected sequentially from smallest to largest, forming an inverted cooling tower structure. Each cooling unit 92 is ring-shaped, fitted onto the stirring shaft 11, and connected to the cooling base 91 via a connector. For example, there can be five cooling units 92.

[0105] The cooling base 91 is connected to the stirring shaft 11 via a sliding bearing, ensuring its ability to slide up and down on the stirring shaft 11. The sliding bearing can be made of a low-friction material, such as polytetrafluoroethylene (PTFE), to reduce motion resistance. The lifting and lowering of the cooling base 91 can be achieved by a hydraulic cylinder or an electric actuator. One end of the hydraulic cylinder is fixed to the support of the mixing vessel, and the other end is connected to the cooling base 91. By extending and retracting the hydraulic cylinder, the cooling base 91 is moved up and down along the stirring shaft 11.

[0106] The cooling unit 92 is deployed and retracted via a hydraulic or electric drive. Each cooling unit 92 is connected to the cooling base 91 via a connector and is deployed upwards by a hydraulic cylinder or electric push rod, forming an inverted cooling tower structure that contracts from top to bottom (larger at the top and smaller at the bottom). The connection between the cooling units 92 can be achieved through hinges or flexible connectors, ensuring a stable cooling tower structure during deployment. After deployment, the cooling unit 92 is fixed in the appropriate position by a limiting device.

[0107] Both the cooling base 91 and the cooling unit 92 have refrigerant circulation channels inside, and the refrigerant is connected to an external refrigeration system through pipes. The refrigerant circulates inside the cooling device, carrying away heat and transferring it to the refrigeration system. The refrigerant inlet 64 and outlet of the cooling base 91 and the cooling unit 92 are connected to the external refrigeration system through pipes to ensure a continuous supply and circulation of refrigerant.

[0108] The cooling device works in conjunction with the stirring device. The stirring blades 12 promote material mixing by rotating, while the cooling device cools the material in real time during the mixing process. The lifting and lowering of the cooling base 91 and the unfolding of the cooling unit 92 can be dynamically adjusted according to the temperature and volume of the material during the stirring process.

[0109] Through the above design, the portable cooling device 9 can achieve efficient temperature control and has flexible adjustment capabilities, making it suitable for the strict temperature requirements in the electrolyte preparation process.

[0110] In this embodiment, a battery manufacturing system is also provided, including an electrolyte preparation system 100 as described in any of the foregoing embodiments.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrolyte preparation system, characterized in that, It includes a liquid salt magnetic preparation vessel, a liquid salt buffer tank, an electrolyte magnetic preparation vessel, and an electrolyte buffer tank, which are connected in sequence through a delivery pipeline; The outer surfaces of the liquid salt magnetic mixing vessel and the electrolyte magnetic mixing vessel are provided with temperature control jacket devices for controlling the temperature of the materials inside the mixing vessel. The temperature control jacket device includes a jacket body and a refrigerant circulation pipeline connected to the jacket body; The electrolyte preparation system also includes a heat exchange circulation device; The heat exchange circulation device is connected to the liquid salt magnetic preparation vessel and is used to cool the lithium hexafluorophosphate in the liquid salt magnetic preparation vessel using a circulating refrigerant. Both the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel include a stirring shaft and stirring blades located at the bottom of the stirring shaft; The electrolyte preparation system also includes a movable cooling device disposed in the liquid salt magnetic preparation vessel and the electrolyte magnetic preparation vessel; The movable cooling device includes a cooling base and cooling units connected to the cooling base in ascending order of size; Both the cooling base and the cooling unit are annular structures and are fitted onto the stirring shaft; both the cooling base and the cooling unit contain circulating refrigerant. The cooling base can move up and down along the length of the stirring shaft; The cooling unit can expand upwards based on the cooling base to form a cooling tower structure that is narrowed from top to bottom.

2. The electrolyte preparation system as described in claim 1, characterized in that, The heat exchange circulation device includes a heat exchanger, a material feed pipeline and a material discharge pipeline for lithium hexafluorophosphate circulation and connected to both the liquid salt magnetic mixing vessel and the heat exchanger, and a refrigerant inlet and a refrigerant outlet provided on the heat exchanger for refrigerant circulation; the heat exchanger, the material feed pipeline, the material discharge pipeline and the liquid salt magnetic mixing vessel form a closed loop for lithium hexafluorophosphate material flow.

3. The electrolyte preparation system as described in claim 2, characterized in that, The liquid salt magnetic mixing vessel and the liquid salt buffer tank are connected by a first discharge pipeline; the material inlet pipeline is connected to the first discharge pipeline; The electrolyte preparation system also includes a liquid salt preparation vessel discharge pump; the liquid salt preparation vessel discharge pump is located on the first discharge pipeline; The electrolyte preparation system also includes a filtration device; the first discharge pipe is equipped with a first filter from the filtration device.

4. The electrolyte preparation system as described in claim 1, characterized in that, The liquid salt buffer tank and the electrolyte magnetic preparation vessel are connected by a second discharge pipeline; The electrolyte preparation system also includes a liquid salt buffer tank discharge pump; the liquid salt buffer tank discharge pump is connected to the second discharge pipeline.

5. The electrolyte preparation system as described in claim 1, characterized in that, The electrolyte magnetic preparation vessel and the electrolyte buffer tank are connected by a third discharge pipeline; and the electrolyte buffer tank is also provided with a final product discharge pipeline. The electrolyte preparation system further includes a second filter located on the third discharge pipeline and a third filter located on the final product discharge pipeline.

6. A battery manufacturing system, characterized in that, Includes the electrolyte preparation system as described in any one of claims 1-5.

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