Material preparation apparatus and battery production device

Abstract

A material preparation apparatus and a battery production device, the material preparation apparatus (100) comprising: a material storage tank (10), which is used for storing a target solvent; a metering assembly (20), which is used for receiving the target solvent and measuring the weight of the received target solvent; a connection pipe (30), which communicates between the material storage tank and the metering assembly; and an air inflation assembly (40), which communicates with the material storage tank and is used for introducing an inert gas into the material storage tank. The air inflation assembly comprises a first air inlet pipe (41), a first air outlet pipe (42), and first control valves (43). The first air inlet pipe and the first air outlet pipe are in communication with the material storage tank. The first control valves are arranged on the first air inlet pipe and the first air outlet pipe, respectively, and are used for controlling the first air inlet pipe or the first air outlet pipe to be opened or closed. The introduced inert gas can form sealing for the target solvent in the material storage tank, and can also form pneumatic transmission for the target solvent in the material storage tank, thus lowering the probability of solvent residue or solvent leakage occurring in the material storage tank or the connection pipe.

Description

A material preparation device and battery production equipment

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on May 27, 2024, with application number 2024211618454, entitled "A Material Preparation Device and Battery Production Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a material preparation device and battery production equipment. Background Technology

[0004] A battery is typically composed of individual battery cells, which in turn include electrode components, a casing, and an electrolyte. The electrode components are housed in the casing, which is filled with electrolyte to ensure full contact between the electrode components and the electrolyte, thereby enabling an electrochemical reaction.

[0005] The preparation of electrolytes involves some special solvents, and even hazardous solvents. However, current solvent preparation processes not only result in some solvent residue in the feed cylinder or conveying pipeline, but also pose certain operational risks due to solvent evaporation or leakage during the preparation process.

[0006] Summary of the Invention

[0007] Therefore, it is necessary to provide a material preparation device and battery production equipment to address the problems of solvent residue volatilization or leakage that are prone to occur during the current solvent preparation process.

[0008] In a first aspect, this application provides a material preparation device for transferring a target solvent. The material preparation device includes a storage tank, a metering component, a connecting pipe, and an inflation component. The storage tank is used to store the target solvent; the metering component is used to receive the target solvent from the storage tank and detect the weight of the received target solvent; the connecting pipe connects the storage tank and the metering component, and is used to transport the target solvent from the storage tank to the metering component; the inflation component is connected to the storage tank and is used to introduce inert gas into the storage tank. The inflation component includes a first inlet pipe, a first outlet pipe, and a first control valve. The first inlet pipe and the first outlet pipe are respectively connected to the storage tank, and the first control valve is respectively disposed on the first inlet pipe and the first outlet pipe, and is used to control the opening and closing of the first inlet pipe or the first outlet pipe.

[0009] With the above structure, on the one hand, when the target solvent is stored in the storage tank, the introduced inert gas can seal the target solvent in the storage tank, reducing the probability of the target solvent evaporating; on the other hand, the continuous introduction of inert gas into the storage tank can also form a gas delivery to the target solvent in the storage tank, smoothly transferring the target solvent from the storage tank to the metering component, reducing the probability of solvent residue or solvent leakage in the storage tank and connecting pipes.

[0010] Furthermore, the above structure enables ventilation within the storage tank, thereby achieving the sealing and smooth transport of the target solvent within the tank. After the target solvent has been transported, the pressure inside the storage tank can be depressurized, thus completing the entire loading process.

[0011] In some embodiments, the storage tank is provided with a first connection port and a second connection port. The first connection port is located at the bottom of the storage tank and is connected to one end of the connecting pipe. The second connection port is located at the top of the storage tank and is connected to the inflation assembly.

[0012] The above structure enables more thorough transfer of the target solvent within the storage tank and also improves the gas delivery effect.

[0013] In some embodiments, the metering component includes a metering tank and a weighing sensor. The metering tank is disposed on the weighing sensor and is used to receive the target solvent. The weighing sensor is used to detect the total weight of the metering tank and the target solvent inside it. A connecting pipe connects the storage tank and the metering tank.

[0014] With the above structure, the weight of the target solvent can be quickly obtained during the transfer of the target solvent from the storage tank to the metering tank, thereby enabling better control of the transfer amount of the target solvent according to actual needs and improving the accuracy of material preparation.

[0015] In some embodiments, a third connection port is provided on the top of the metering tank, and the end of the connecting pipe opposite to the storage tank is connected to the third connection port.

[0016] The above structure allows the target solvent in the connecting pipe to be transferred more thoroughly into the metering tank, reducing the amount of target solvent remaining inside the connecting pipe.

[0017] In some embodiments, the metering assembly further includes a second inlet pipe, a second outlet pipe, and a second control valve. The second inlet pipe and the second outlet pipe are respectively connected to the metering tank, and the second control valve is respectively disposed on the second inlet pipe and the second outlet pipe and is used to control the on / off state of the second inlet pipe or the second outlet pipe.

[0018] With the above structure, the target solvent in the storage tank can be smoothly transported to the metering tank by inert gas blowing, and then the target solvent can be weighed in the metering tank.

[0019] In some embodiments, the metering assembly further includes a first pressure sensor disposed on the metering tank and used to detect the pressure inside the metering tank.

[0020] With the above structure, during the process of transferring the target solvent from the storage tank to the metering tank, the first pressure sensor can detect the pressure in the metering tank in real time, ensuring the stability of the pressure in the metering tank, thereby making the results detected by the weighing sensor more accurate.

[0021] In some embodiments, the preparation device further includes a filter disposed on a connecting pipe for filtering the target solvent passing through the connecting pipe.

[0022] With the above structure, when the target solvent enters the metering tank through the connecting pipe, the filter can filter the target solvent in the connecting pipe, remove some impurities, and make the target solvent entering the metering tank cleaner.

[0023] In some embodiments, the preparation device further includes a liquid receiving tank, which is disposed below the filter along the direction of gravity. This allows for the collection of residual liquid or residual impurities from the filter.

[0024] In some embodiments, the material preparation device further includes a second pressure sensor disposed on the connecting pipe, the second pressure sensor being used to detect the pressure inside the connecting pipe.

[0025] The above structure allows for rapid detection of pressure within the connecting pipes, thereby determining the remaining amount of the target solvent in the storage tank for timely operation.

[0026] Secondly, this application also provides a battery production apparatus, including the material preparation device described above.

[0027] The aforementioned material preparation device and battery production equipment can transfer the target solvent in the storage tank to the metering component through connecting pipes, and then detect the weight of the target solvent to facilitate solvent mixing and batching. The gas filling component can introduce inert gas into the storage tank. On the one hand, when the target solvent is stored in the storage tank, the introduced inert gas can seal the target solvent in the storage tank, reducing the probability of solvent evaporation. On the other hand, the continuous introduction of inert gas into the storage tank can also pneumatically transfer the target solvent from the storage tank to the metering component, reducing the probability of solvent residue or leakage in the storage tank and connecting pipes. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the overall structure of the material preparation device according to one or more embodiments.

[0030] Explanation of reference numerals in the attached drawings: 100, material preparation device; 10, storage tank; 20, metering component; 30, connecting pipe; 40, air filling component; 50, filter; 60, liquid receiving tank; 70, second pressure sensor; 21, metering tank; 22, weighing sensor; 23, second air inlet pipe; 24, second air outlet pipe; 25, second control valve; 26, first pressure sensor; 41, first air inlet pipe; 42, first air outlet pipe; 43, first control valve. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0038] A battery cell is the smallest unit that makes up a battery. The structure of a battery cell typically involves placing electrode components inside a casing, which is then filled with an electrolyte to ensure sufficient contact between the electrode components and the electrolyte. The preparation of the electrolyte requires mixing various solvents in predetermined proportions to obtain the final desired electrolyte.

[0039] Since there are many types of solvents used to form the electrolyte, including some flammable and explosive hazardous solvents, safety during the solvent preparation process is of paramount importance.

[0040] In addition, the weight of different solvents needs to be calculated during the preparation process so that they can be mixed in a predetermined ratio. This process involves the storage, transfer, and testing of the solvents.

[0041] However, in current solvent preparation processes, solvent is typically stored in a container and then transferred to the metering device via a pump using a suction gun. This approach has several drawbacks. First, the solvent in the container is exposed during loading, making it susceptible to air contamination. Second, the suction gun may carry some solvent out during extraction, leading to evaporation. Third, using a pump to transport solvent can result in solvent residue in the container or delivery pipes. Furthermore, aging or other problems with the pumping device can easily lead to solvent leakage, posing certain operational risks.

[0042] Based on the above considerations, to address the problems of solvent residue evaporation or leakage during current solvent preparation processes, one or more embodiments of this application provide a preparation device capable of transferring the target solvent from a storage tank to a metering component via a connecting pipe, and then detecting the weight of the target solvent to facilitate solvent mixing and batching. The aeration component can introduce inert gas into the storage tank. On one hand, when the target solvent is stored in the storage tank, the introduced inert gas can seal the target solvent within the tank, reducing the probability of solvent evaporation. On the other hand, the continuous introduction of inert gas into the storage tank can also provide pneumatic delivery of the target solvent, smoothly transferring it from the storage tank to the metering component, reducing the probability of solvent residue or leakage in the storage tank or connecting pipes.

[0043] Referring to Figure 1, one embodiment of this application provides a material preparation device 100 for transferring a target solvent. The material preparation device 100 includes a storage tank 10, a metering component 20, a connecting pipe 30, and an aeration component 40. The storage tank 10 is used to store the target solvent. The metering component 20 is used to receive the target solvent from the storage tank 10 and detect the weight of the received target solvent. The connecting pipe 30 connects the storage tank 10 and the metering component 20, and is used to transport the target solvent from the storage tank 10 to the metering component 20. The aeration component 40 is connected to the storage tank 10 and is used to introduce inert gas into the storage tank 10.

[0044] It should be noted that the material preparation device 100 of this application can be applied to the material preparation process of various solvents in the electrolyte preparation process. The material preparation device 100 can be used to transfer some hazardous solvents, and of course, it can also be used to transfer other common solvents.

[0045] Storage tank 10 refers to a structure capable of storing and feeding the target solvent. The interior of storage tank 10 is hollow to provide storage space for the target solvent. Metering component 20 refers to a component capable of receiving the target solvent fed from storage tank 10 and detecting the weight of the received target solvent. Thus, a certain amount of target solvent can be input into metering component 20 according to the preparation ratio for subsequent mixing with other solvents.

[0046] The connecting pipe 30 refers to the structure used to connect the storage tank 10 to the metering component 20 so that the target solvent can be transferred from the storage tank 10 to the metering component 20 via the connecting pipe 30.

[0047] The inflation assembly 40 refers to a structure capable of introducing inert gas into the storage tank 10. Specifically, the inflation assembly 40 can introduce nitrogen gas into the storage tank 10. The inflation assembly 40 can introduce nitrogen gas into the storage tank 10 at different times as needed.

[0048] For example, before loading the storage tank 10, the target solvent is first injected into it to temporarily store the target solvent. After the target solvent is injected, nitrogen gas can be introduced into the storage tank 10 through the aeration component 40. At this time, the nitrogen gas forms a nitrogen seal for the target solvent, thereby reducing the probability of the target solvent evaporating or reacting with air.

[0049] During the process of transferring the target solvent from the storage tank 10 to the metering component 20, nitrogen gas can be continuously introduced into the storage tank 10 through the aeration component 40. Under the pressure of the nitrogen gas, the target solvent enters the metering component 20 through the connecting pipe 30, thus achieving the transfer of the target solvent. In this process, nitrogen gas not only facilitates the transfer of the target solvent but also effectively removes residual target solvent from the storage tank 10 or the connecting pipe 30, making the transfer of the target solvent more thorough. Furthermore, using nitrogen gas instead of pumping reduces the probability of leakage.

[0050] Thus, through the above structure, on the one hand, when the target solvent is stored in the storage tank 10, the introduced inert gas can seal the target solvent in the storage tank 10, reducing the probability of the target solvent evaporating; on the other hand, continuously introducing inert gas into the storage tank 10 can also pneumatically transfer the target solvent in the storage tank 10, smoothly transferring the target solvent from the storage tank 10 to the metering component 20, reducing the probability of solvent residue or solvent leakage in the storage tank 10 and connecting pipe 30.

[0051] In some embodiments, the storage tank 10 is provided with a first connection port (not shown in the figure) and a second connection port (not shown in the figure). The first connection port is located at the bottom of the storage tank 10 and is connected to one end of the connecting pipe 30. The second connection port is located at the top of the storage tank 10 and is connected to the inflation assembly 40.

[0052] Specifically, both the first and second connection ports are connected to the interior of the storage tank 10. Connecting the first connection port to the connecting pipe 30 allows the target solvent and nitrogen gas in the storage tank 10 to smoothly enter the connecting pipe 30, and then enter the metering component 20 via the connecting pipe 30. Connecting the second connection port to the gas filling component 40 allows nitrogen gas to smoothly enter the storage tank 10 via the second connection port, achieving the purpose of nitrogen sealing or nitrogen blowing.

[0053] Furthermore, the first connection port is located at the bottom of the storage tank 10, and the second connection port is located at the top of the storage tank 10. Thus, nitrogen gas enters the storage tank 10 from top to bottom through the second connection port. Under the pressure of the nitrogen gas, the target solvent inside the storage tank 10 enters the connecting pipe 30 through the first connection port at the bottom. This not only improves the nitrogen blowing effect but also minimizes the residue of the target solvent inside the storage tank 10.

[0054] The above structure enables more thorough transfer of the target solvent within the storage tank 10 and also improves the pneumatic conveying effect.

[0055] In some embodiments, the inflation assembly 40 includes a first air inlet pipe 41, a first air outlet pipe 42, and a first control valve 43. The first air inlet pipe 41 and the first air outlet pipe 42 are respectively connected to the storage tank 10. The first control valve 43 is respectively disposed on the first air inlet pipe 41 and the first air outlet pipe 42 and is used to control the opening and closing of the first air inlet pipe 41 or the first air outlet pipe 42.

[0056] It should be noted that there can be two first control valves 43, which are respectively installed on the first air inlet pipe 41 and the first air outlet pipe 42. In addition, the second connection port can also be configured as two sub-ports, which are respectively connected to the first air inlet pipe 41 and the first air outlet pipe 42.

[0057] The first air inlet pipe 41 can input nitrogen into the storage tank 10, while the first air outlet pipe 42 can discharge nitrogen or other gases from the storage tank 10.

[0058] Specifically, during use, the first control valve 43 on the first inlet pipe 41 is first opened, and the first control valve 43 on the first outlet pipe 42 is closed. At this time, nitrogen gas is introduced into the storage tank 10 through the first inlet pipe 41. Under the pressure of the nitrogen gas, the target solvent is transferred from the storage tank 10 to the metering component 20. When the weight of the target solvent in the metering component 20 reaches the target requirement, the first control valve 43 on the first inlet pipe 41 is closed, and the first control valve 43 on the first outlet pipe 42 is opened to depressurize the inside of the preparation device 100, thus completing the complete loading process of the target solvent.

[0059] Through the above structure, ventilation can be achieved in the storage tank 10, thereby achieving the sealing and smooth delivery of the target solvent in the storage tank 10. After the target solvent is delivered, the pressure in the storage tank 10 can also be depressurized to achieve the complete feeding process.

[0060] In some embodiments, the metering assembly 20 includes a metering tank 21 and a weighing sensor 22. The metering tank 21 is disposed on the weighing sensor 22 and is used to receive the target solvent. The weighing sensor 22 is used to detect the total weight of the metering tank 21 and the target solvent inside it. A connecting pipe 30 connects the storage tank 10 and the metering tank 21.

[0061] Specifically, the metering tank 21 is hollow inside, providing storage space for the target solvent. A connecting pipe 30 connects the storage tank 10 and the metering tank 21, allowing the target solvent in the storage tank 10 to be smoothly transferred to the metering tank 21.

[0062] Furthermore, the metering tank 21 is mounted on the weighing sensor 22. Before transferring the target solvent, the weighing sensor 22 can obtain the weight of the metering tank 21 itself. During the transfer of the target solvent, the weighing sensor 22 can quickly obtain the weight of the target solvent being transferred based on the changing weight, thereby enabling accurate control of the amount of target solvent transferred to the metering tank 21 according to actual production needs, so as to facilitate subsequent mixing and formulation with other solvents.

[0063] With the above structure, the weight of the target solvent can be quickly obtained during the process of transferring the target solvent from the storage tank 10 to the metering tank 21, thereby enabling better control of the transfer amount of the target solvent according to actual needs and improving the accuracy of material preparation.

[0064] In some embodiments, a third connection port (not shown in the figure) is provided on the top of the metering tank 21, and the end of the connecting pipe 30 away from the storage tank 10 is connected to the third connection port.

[0065] Specifically, the third connection port is connected to the interior of the metering tank 21. When the target solvent in the connecting pipe 30 moves under the pressure of nitrogen, there is a climbing process before entering the metering tank 21. Thus, under the pressure of nitrogen, the target solvent in the connecting pipe 30 can be transferred more thoroughly into the metering tank 21, reducing the amount of target solvent remaining inside the connecting pipe 30.

[0066] The above structure allows the target solvent in the connecting pipe 30 to be transferred more thoroughly to the metering tank 21, reducing the amount of target solvent remaining inside the connecting pipe 30.

[0067] In some embodiments, the metering assembly 20 further includes a second air inlet pipe 23, a second air outlet pipe 24, and a second control valve 25. The second air inlet pipe 23 and the second air outlet pipe 24 are respectively connected to the metering tank 21. The second control valve 25 is respectively disposed on the second air inlet pipe 23 and the second air outlet pipe 24 and is used to control the opening and closing of the second air inlet pipe 23 or the second air outlet pipe 24.

[0068] It should be noted that there can be two second control valves 25, which are respectively installed on the second air inlet pipe 23 and the second air outlet pipe 24. The second air inlet pipe 23 enables air to enter the metering tank 21, while the second air outlet pipe 24 enables the gas to exit the metering tank 21.

[0069] Specifically, during operation, the first control valve 43 on the first inlet pipe 41, the second control valve 25 on the second inlet pipe 23, and the second control valve 25 on the second outlet pipe 24 are first opened, while the first control valve 43 on the first outlet pipe 42 is closed. At this time, nitrogen gas is introduced into the storage tank 10 through the first inlet pipe 41, and under the pressure of the nitrogen, the target solvent is transferred from the storage tank 10 to the metering tank 21. When the weight of the target solvent in the metering tank 21 reaches the target requirement, the first control valve 43 on the first inlet pipe 41 is closed, and the first control valve 43 on the first outlet pipe 42 is opened to depressurize the inside of the material preparation device 100. After depressurization, the second control valve 25 on the second inlet pipe 23 and the second control valve 25 on the second outlet pipe 24 are closed sequentially, thus pausing the feeding operation.

[0070] With the above structure, the target solvent in the storage tank 10 can be smoothly transported to the metering tank 21 by inert gas blowing, and then the target solvent can be weighed in the metering tank 21.

[0071] In some embodiments, the metering assembly 20 further includes a first pressure sensor 26 disposed on the metering tank 21 and used to detect the pressure inside the metering tank 21.

[0072] Specifically, during the process of transferring the target solvent from the storage tank 10 to the metering tank 21, the first pressure sensor 26 can detect the pressure in the metering tank 21 in real time to ensure the stability of the pressure in the metering tank 21, thereby making the results detected by the weighing sensor 22 more accurate.

[0073] In some embodiments, the preparation device 100 further includes a filter 50 disposed on the connecting pipe 30, the filter 50 being used to filter the target solvent passing through the connecting pipe 30.

[0074] Specifically, the filter 50 can be, but is not limited to, a microporous filter 50. When the target solvent enters the metering tank 21 via the connecting pipe 30, the filter 50 can filter the target solvent in the connecting pipe 30, removing some impurities, so that the target solvent entering the metering tank 21 is cleaner.

[0075] In some embodiments, the material preparation device 100 further includes a liquid receiving tank 60, which is disposed below the filter 50 along the direction of gravity.

[0076] Specifically, the liquid receiving tank 60 is positioned below the filter 50 along the direction of gravity, which can collect some residual liquid or residual impurities in the filter 50.

[0077] In some embodiments, the material preparation device 100 further includes a second pressure sensor 70 disposed on the connecting pipe 30, the second pressure sensor 70 being used to detect the pressure inside the connecting pipe 30.

[0078] Specifically, when the second pressure sensor 70 detects a sudden drop in pressure, it can be determined that the target solvent in the storage tank 10 has been emptied. At this time, nitrogen purging can be performed on the storage tank 10 and the connecting pipe 30 according to the system's set time to further reduce the residual target solvent in the storage tank 10 and the connecting pipe 30.

[0079] Therefore, the pressure inside the connecting pipe 30 can be quickly detected through the above structure, thereby determining the remaining amount of the target solvent in the storage tank 10, so as to facilitate timely operation.

[0080] Based on the same concept as the above-described material preparation device 100, this application also provides a battery production apparatus, including the material preparation device 100 as described above. The material preparation device 100 can be used in the electrolyte preparation process during battery production, and can store and transfer various solvents during the electrolyte preparation process.

[0081] According to one or more embodiments, when using this application, the target solvent is first injected into the storage tank 10. After the injection is completed, nitrogen gas is introduced into the storage tank 10 through the first air inlet pipe 41 to achieve nitrogen sealing of the target solvent.

[0082] During the feeding process, the first control valve 43 on the first air inlet pipe 41, the second control valve 25 on the second air inlet pipe 23, and the second control valve 25 on the second air outlet pipe 24 are opened sequentially. Nitrogen gas is introduced into the storage tank 10 at a set pressure (0.2MP-0.3MP), so that the target solvent in the storage tank 10 enters the metering tank 21 through the connecting pipe 30 under the pressure of the nitrogen gas.

[0083] During this process, the target solvent can be filtered through filter 50 in connecting pipe 30 before entering metering tank 21. When weighing sensor 22 detects that the weight of the target solvent in metering tank 21 reaches the target requirement, the first control valve 43 on the first air inlet pipe 41 is closed, and the first control valve 43 on the first air outlet pipe 42 is opened to depressurize the inside of the material preparation device 100. After depressurization is completed, the second control valve 25 on the second air inlet pipe 23 and the second control valve 25 on the second air outlet pipe 24 are closed in sequence.

[0084] In addition, during the feeding process, the second pressure sensor 70 can also detect the pressure in the connecting pipe 30. When the pressure in the connecting pipe 30 suddenly drops, it can be determined that the target solvent in the storage tank 10 has been emptied. At this time, nitrogen purging is performed on the storage tank 10 and the connecting pipe 30 according to the system set time, which can further reduce the residue of the target solvent in the storage tank 10 and the connecting pipe 30.

[0085] After nitrogen purging is completed, the first control valve 43 on the first inlet pipe 41, the first control valve 43 on the first outlet pipe 42, the second control valve 25 on the second inlet pipe 23, and the second control valve 25 on the second outlet pipe 24 are closed in sequence to complete the material preparation process.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A material preparation device for transferring a target solvent, the material preparation device comprising: Storage tank for storing the target solvent; A metering component is used to receive the target solvent from the storage tank and detect the weight of the received target solvent; A connecting pipe, linking the storage tank and the metering component, is used to transport the target solvent from the storage tank to the metering component; and An inflation assembly is connected to the storage tank and is used to introduce inert gas into the storage tank. The inflation assembly includes a first inlet pipe, a first outlet pipe, and a first control valve. The first inlet pipe and the first outlet pipe are respectively connected to the storage tank. The first control valve is respectively disposed on the first inlet pipe and the first outlet pipe and is used to control the opening and closing of the first inlet pipe or the first outlet pipe.

2. The material preparation device according to claim 1, wherein, The storage tank is provided with a first connection port and a second connection port. The first connection port is located at the bottom of the storage tank and is connected to one end of the connecting pipe. The second connection port is located at the top of the storage tank and is connected to the inflation assembly.

3. The material preparation device according to claim 1 or 2, wherein, The metering component includes a metering tank and a weighing sensor. The metering tank is disposed on the weighing sensor and is used to receive the target solvent. The weighing sensor is used to detect the total weight of the metering tank and the target solvent inside it. The connecting pipe connects the storage tank and the metering tank.

4. The material preparation device according to claim 3, wherein, A third connection port is provided on the top of the metering tank, and the end of the connecting pipe opposite to the storage tank is connected to the third connection port.

5. The material preparation device according to claim 3 or 4, wherein, The metering assembly further includes a second air inlet pipe, a second air outlet pipe, and a second control valve. The second air inlet pipe and the second air outlet pipe are respectively connected to the metering tank. The second control valve is respectively installed on the second air inlet pipe and the second air outlet pipe and is used to control the opening and closing of the second air inlet pipe or the second air outlet pipe.

6. The material preparation device according to any one of claims 3-5, wherein, The metering assembly also includes a first pressure sensor, which is disposed on the metering tank and used to detect the pressure inside the metering tank.

7. The material preparation device according to any one of claims 1-6, wherein, The material preparation device also includes a filter disposed on the connecting pipe, the filter being used to filter the target solvent passing through the connecting pipe.

8. The material preparation device according to claim 7, wherein, The material preparation device also includes a liquid receiving tank, which is arranged below the filter along the direction of gravity.

9. The material preparation device according to any one of claims 1-8, wherein, The material preparation device also includes a second pressure sensor installed on the connecting pipe, which is used to detect the pressure inside the connecting pipe.

10. A battery production apparatus, comprising the material preparation device as described in any one of claims 1-9.

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