Method for arranging electrolyte storage tank, electrolyte storage tank and flow battery system

Abstract

The invention relates to the technical field of flow batteries, and discloses a method for arranging an electrolyte storage tank, the electrolyte storage tank and a flow battery system.The electrolyte storage tank comprises a storage tank body and a stirring device, and the stirring device is arranged to be installed in the storage tank body so as to stir electrolyte in the storage tank body; the method comprises the following steps: establishing a storage tank geometric model of the storage tank; performing analog simulation on fluid in the storage tank based on the storage tank geometric model; and determining a target area of the simulated fluid in the storage tank in a predetermined state, and determining the installation position of the stirring device in the storage tank according to the target area. According to the scheme provided by the invention, the circulation efficiency of the electrolyte in the electrolyte storage tank can be improved, so that the charge-discharge efficiency of the whole flow battery system is improved.

Description

Technical Field

[0001] This document relates to the technical field of flow batteries, and particularly to a method for arranging an electrolyte storage tank, an electrolyte storage tank, and a flow battery system. Background Art

[0002] A flow battery (electrochemical battery), also known as a redox flow battery, is an electrochemical energy storage technology and a new type of storage battery, which mainly consists of a stack, electrolytes, an electrolyte storage tank, pumps, pipelines, and other auxiliary equipment. The positive and negative electrolytes are respectively contained in independent storage tanks. The electrolytes are pumped through the stack by their respective pumps, and an electrochemical reaction occurs inside the stack. The reacted electrolytes return to the original storage tanks, forming an electrolyte circulation loop.

[0003] The battery output power of a flow battery system depends on the size of the battery stack, and the energy storage capacity depends on the electrolyte storage volume and concentration. When the output power is constant, to increase the energy storage capacity, only the volume of the electrolyte storage tank can be increased or the electrolyte concentration can be increased. However, with the increase in the storage tank volume, relying solely on the liquid supply by the liquid pump and the flow generated by the electrolytes returning from the stack to the tank cannot meet the working requirements of the electrolyte concentration uniformity in the tank, reducing the utilization rate of the electrolyte and increasing the error in the calculation of the state of charge of the system.

[0004] To improve the utilization rate of the electrolyte in the storage tank, a stirring device can be added in the storage tank to reduce the existence of dead zones in the storage tank and promote the recycling of the liquid in the tank. However, how to arrange the stirring device in the storage tank to more effectively improve the circulation efficiency of the electrolyte in the storage tank is a technical problem that the industry has been in need of solving. Summary of the Invention

[0005] Embodiments of the present application provide a method for arranging an electrolyte storage tank, an electrolyte storage tank, and a flow battery system to solve the problem of how to arrange a stirring device in the electrolyte storage tank to improve the circulation efficiency of the electrolyte in the storage tank.

[0006] An embodiment of the present application provides a method for arranging an electrolyte storage tank. The electrolyte storage tank includes a storage tank and a stirring device. The stirring device is arranged to be installed in the storage tank to stir the electrolyte in the storage tank. The method includes: Establish a geometric model of the storage tank; Based on the geometric model of the storage tank, perform a simulation on the fluid in the storage tank; Determine a target area where the fluid in the simulated storage tank is in a predetermined state, and determine the installation position of the stirring device in the storage tank according to the target area.

[0007] In one embodiment, the performing a simulation on the fluid in the storage tank based on the geometric model of the storage tank includes: Based on the geometric model of the storage tank, a VOF multiphase flow model is established.

[0008] In one embodiment, the method further includes: determining the start time of the stirring device installed in the storage tank.

[0009] In one embodiment, the determining the start time of the stirring device installed in the storage tank includes: Determining the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value; Based on the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value, determining the start time of the stirring device installed in the storage tank.

[0010] In one embodiment, the determining the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value includes: Obtaining a schematic diagram of the change of the volume ratio of the original electrolyte in the simulated storage tank over time; Based on the change schematic diagram, determining the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value.

[0011] In one embodiment, the determining the start time of the stirring device installed in the storage tank based on the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value includes: Based on the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value, determining multiple sampling time points for sampling the electrolyte in the storage tank; Sampling and detecting the electrolyte in the storage tank at the multiple sampling time points to obtain the actual time when the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value; Taking the actual time when the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value as the start time of the stirring device installed in the storage tank.

[0012] In one embodiment, when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value, the target area is determined.

[0013] An embodiment of the present application further provides an electrolyte storage tank for a flow battery system, including a storage tank and a stirring device installed in the storage tank, wherein the electrolyte storage tank is arranged by using the method as described above.

[0014] In one embodiment, the stirring device includes a stirring component installed in the storage tank and an electromagnetic driving mechanism installed outside the storage tank, and the electromagnetic driving mechanism is configured to control the start and stop of the stirring component by magnetic force.

[0015] An embodiment of the present application further provides a flow battery system, including a stack, a positive electrolyte storage tank, and a negative electrolyte storage tank, and both the positive electrolyte storage tank and the negative electrolyte storage tank adopt the electrolyte storage tank as described above.

[0016] The technical solution provided by the embodiment of the present application, by simulating the outflow of the electrolyte in the storage tank to obtain the target area where the fluid is in a predetermined state, and according to the simulation, the corresponding position in the storage tank corresponding to this target area can be used as the position for installing the stirring device. In this way, the stirring device stirs the electrolyte at this position, which can effectively promote the flow of the electrolyte and improve the circulation efficiency of the electrolyte in the electrolyte storage tank of the flow battery system, thereby enhancing the charge and discharge efficiency of the entire flow battery system.

[0017] Other features and advantages of the present application will be described in the subsequent specification, and some of them will become obvious from the specification, or be understood by implementing the present application. Other advantages of the present application can be achieved and obtained through the solutions described in the specification and the drawings. Description of the Drawings

[0018] The drawings are used to provide an understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation to the technical solution of the present application.

[0019] Figure 1 It is a schematic flow chart of a method for setting an electrolyte storage tank provided in an embodiment of the present application; Figure 2 It is a geometric model diagram of a storage tank in an embodiment of the present application; Figure 3 It is a schematic diagram of a model of the fluid in the storage tank in an embodiment of the present application; Figure 4 It is a schematic diagram of the change of the volume of the original electrolyte in the storage tank over time in an embodiment of the present application; Figure 5 It is a schematic structural diagram of an electrolyte storage tank in an embodiment of the present application; Figure 6 It is a schematic structural diagram of a flow battery system in an embodiment of the present application. Detailed Embodiments

[0020] This application describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope of the embodiments described in this application. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be combined with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0021] This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form a unique inventive solution. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented alone or in any suitable combination. Therefore, the embodiments are not subject to other limitations except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of the appended claims.

[0022] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific order of the steps described herein, the method or process should not be limited to the specific order of steps described. As will be understood by those of ordinary skill in the art, other step orders are possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can easily understand that these orders can vary and still remain within the spirit and scope of the embodiments of this application.

[0023] An embodiment of this application provides a method for setting up an electrolyte storage tank. The electrolyte storage tank includes a storage tank 1 and a stirring device 2. The stirring device 2 is arranged to be installed in the storage tank 1 to stir the electrolyte in the storage tank 1. As Figure 1 shown, the method includes: Establish a geometric model of the storage tank 1; Based on the geometric model of the storage tank, simulate and analyze the fluid in the storage tank 1; Determine the target area where the fluid in the simulated storage tank is in a predetermined state, and determine the installation position of the stirring device 2 in the storage tank 1 according to the target area. Among them, the target area in the predetermined state can be the area where the fluid flow in the simulated storage tank is relatively slow or the flow dead zone.

[0024] The technical solution provided by the embodiment of the present application, by simulating the outflow of the electrolyte in the storage tank 1, obtains the target area where the fluid is in a predetermined state. According to the simulation, the target area can be obtained, and the corresponding position in the storage tank 1 corresponding to this target area can be used as the installation position of the stirring device 2. In this way, the stirring device 2 stirs the electrolyte at this position, which can effectively promote the flow of the electrolyte and improve the circulation efficiency of the electrolyte in the electrolyte storage tank in the flow battery system, thereby improving the charge and discharge efficiency of the entire flow battery system.

[0025] In one embodiment, as Figure 5 shown, the stirring device 2 can be set to include a stirring component 21 located in the storage tank 1 and an electromagnetic driving mechanism 22 located outside the storage tank 1. The electromagnetic driving mechanism 22 is set to control the start and stop of the stirring component 21 through magnetic force. Utilizing the principle of like poles repelling and opposite poles attracting in the magnetic field, the electromagnetic driving mechanism 2 can push the stirring component 21 placed in the storage tank 1 to rotate in a circular motion through the magnetic field, thereby achieving the purpose of stirring the fluid. Among them, the electromagnetic driving device 22 can be set to generate magnetic force when powered on to control the rotation of the stirring component 21 to stir the electrolyte, and lose magnetic force when powered off, causing the stirring component 21 to stop rotating.

[0026] For the stirring device 2 provided in this embodiment, only the stirring component 21 needs to be installed in the storage tank 1, and the driving mechanism for driving the rotation of the stirring component 21 is arranged outside the storage tank 1. In this way, the structure of the stirring component 21 inside the storage tank 1 is simple and convenient to maintain. Moreover, only the stirring component 21 is installed in the storage tank 1, and the stirring component 21 occupies a small volume, so the volume of the same storage tank 1 can be designed larger.

[0027] In some embodiments, when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value, determine the target area where the fluid in the simulated storage tank is in a predetermined state. Among them, the volume ratio of the original electrolyte flowing out of the storage tank refers to the ratio of the volume of the original electrolyte flowing out of the storage tank to the total volume of the electrolyte in the storage tank. That is to say, the volume ratio of the original electrolyte flowing out of the storage tank is the difference between 100% of the total electrolyte volume and the volume ratio of the original electrolyte in the storage tank.

[0028] When the volume ratio of the original electrolyte flowing out of the storage tank reaches a predetermined value (for example, the volume ratio of the original electrolyte flowing out of the storage tank reaches 90%, or the volume ratio of the original electrolyte in the storage tank is 10%), the outflow rate of the original electrolyte will be relatively slow. When the volume ratio of the original electrolyte flowing out approximately reaches the predetermined value, start the stirring device 2 to stir the area where the remaining original electrolyte in the storage tank 1 flows slowly or the dead zone of flow, so that it can flow out of the storage tank 1 quickly. Therefore, during the process of simulating and emulating the fluid, when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches the predetermined value, the target area can be determined, which can make the arrangement position of the stirring device 2 more reasonable.

[0029] In one embodiment, as Figure 1 shown, the method for setting the electrolyte storage tank further includes: determining the start time of the stirring device 2 installed in the storage tank 1.

[0030] The determination of the start time of the stirring device 2 installed in the storage tank 1 may include: Determining the time when the volume ratio of the original electrolyte flowing out of the storage tank 1 in the simulated fluid reaches the predetermined value; According to the time when the volume ratio of the original electrolyte flowing out of the storage tank 1 in the simulated fluid reaches the predetermined value, determining the start time of the stirring device 2 installed in the storage tank 1.

[0031] Generally, when the volume ratio of the original electrolyte flowing out of the storage tank 1 is relatively large, for example, when the volume ratio of the original electrolyte flowing out of the storage tank reaches 90% (it can also be a volume ratio of other numerical values), the amount of the original electrolyte in the storage tank is less, and the outflow rate will be relatively slow. At this time, the stirring device 2 can be started to stir to promote the outflow of the original electrolyte in the storage tank 1. Through simulation and emulation in the embodiments of the present application, the reasonable start time of the stirring device 2 in the electrolyte storage tank is determined, so that the stirring device 2 stirs in the storage tank 1 in a timely manner, thereby accelerating the outflow rate of the fluid with slow flow out of the storage tank. By reasonably controlling the start time of the stirring device 2, it is not necessary to stir the electrolyte throughout the process, which can reduce the power demand and reduce energy waste.

[0032] In one example, the determination of the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches the predetermined value includes: Obtaining a schematic diagram of the change of the volume ratio of the original electrolyte in the simulated storage tank over time; determining the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches the predetermined value according to the change schematic diagram.

[0033] Figure 4 As the schematic diagram of the change of the volume ratio of the original electrolyte in the storage tank over time obtained by transient simulation and emulation in one example, from Figure 4It can be seen that at 40 minutes, the volume ratio of the original electrolyte in the storage tank is 10%, that is, the volume ratio of the original electrolyte flowing out of the storage tank reaches 90%. At this time, the speed of the original electrolyte flowing out of the storage tank will be relatively slow. Therefore, when the time for the electrolyte to flow out of the storage tank is 40 minutes, the stirring device 2 can be started to stir the electrolyte.

[0034] Since there is a difference between the simulation of the fluid and the actual fluid state, it is also possible to detect the electrolyte in the actual storage tank to further optimize the start control strategy of the stirring device 2.

[0035] In one example, determining the start time of the stirring device 2 installed in the storage tank according to the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value may include: Determining multiple sampling time points for sampling the electrolyte in the storage tank 1 according to the time when the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value; Sampling and detecting the electrolyte in the storage tank 1 at multiple sampling time points to obtain the actual time when the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value; Taking the actual time when the volume ratio of the original electrolyte flowing out of the storage tank 1 reaches the predetermined value as the start time of the stirring device 2 installed in the storage tank 1.

[0036] Among them, the multiple sampling time points may be multiple time points near the time point when the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value. For example, Figure 4 In, the time point when the volume ratio of the original electrolyte flowing out of the storage tank reaches 90% is 40 minutes. Samples of the actual electrolyte in the storage tank 1 can be taken at 38 minutes, 39 minutes, 40 minutes, 41 minutes, and 42 minutes respectively, and the sampled electrolyte can be detected. By detecting the ion valence state and concentration of the sampled electrolyte, it is possible to determine the sample in which the volume ratio of the original electrolyte flowing out of the storage tank basically reaches 90%. The time point of obtaining this sample (for example, 41 minutes) is the actual time when the volume ratio of the original electrolyte flowing out of the storage tank 1 reaches the predetermined value. This 41 minutes is used as the time point to start the stirring device 2. That is to say, when the time for circulating the electrolyte in the storage tank 1 reaches 41 minutes, the stirring device 2 is started.

[0037] Of course, in some embodiments, the time when the volume ratio of the simulated electrolyte flowing out of the storage tank reaches the predetermined value can also be directly used as the time to start the stirring device 2.

[0038] It can be understood that the volume ratio of the original electrolyte flowing out of the storage tank can correspond to the charge and discharge capacity of the flow battery system. That is to say, the time when the volume ratio of the original electrolyte flowing out of the storage tank reaches a predetermined value can be regarded as the time when the charge or discharge capacity of the flow battery system reaches a predetermined capacity. When it is detected that the charge or discharge capacity of the flow battery system reaches the predetermined capacity, the stirring device 2 is controlled to start. In addition, the operation duration of the stirring device 2 can be set. For example, it automatically shuts down after starting for a predetermined duration.

[0039] In one embodiment, the simulation of the fluid in the storage tank based on the geometric model of the storage tank includes: establishing a VOF (Volume of Fluid) multiphase flow model based on the geometric model of the storage tank. Of course, in addition to using the VOF multiphase flow model for simulating the outflow of the electrolyte in the storage tank 1, other types of multiphase flow simulation methods can also be used.

[0040] The VOF multiphase flow model can simulate two or more immiscible fluids by solving a set of momentum equations and tracking the volume fraction of each phase in the computational domain. The VOF multiphase flow model assumes non-penetration between each other in the computational domain. For each phase added to the model, a new variable is introduced: the volume fraction of this phase in the computational grid. In each grid, the sum of the volume fractions of all phases is 1. Therefore, according to the value of the volume fraction, the phase distribution in this grid can be obtained. Assume that the volume fraction of the nth phase in a certain grid is α n , then there is: α n = 0: The nth phase does not exist in the grid; α n = 1: The grid is entirely the nth phase; 0 < α n < 1: The grid contains the interface between the nth phase and other phases.

[0041] In the embodiments of the present application, in the VOF multiphase flow model, the multiphase fluid is the original electrolyte in the storage tank and the electrolyte newly flowing into the storage tank.

[0042] The following describes the specific process of setting the electrolyte storage tank by simulating the fluid through establishing a VOF multiphase flow model according to an embodiment.

[0043] Establish the geometric model of the storage tank 1. Based on the geometric model of the storage tank, establish a VOF multiphase flow model. As shown in Figure 2 and Figure 3 , the specific establishment process of the VOF multiphase flow model can be achieved by those skilled in the art and will not be specifically described herein.

[0044] The fluid is transiently simulated by the VOF multiphase flow model to obtain a curve graph of the volume ratio of the original electrolyte in the storage tank changing with time, as Figure 4 shown.

[0045] From Figure 4 it can be seen that when it is 40 min, the volume ratio of the simulated original electrolyte flowing out of the storage tank reaches 90%. After that, the outflow rate of the original electrolyte is slow, indicating that there is a slow-flowing area or a dead zone in the storage tank. A stirring device 2 is installed at the position corresponding to the slow-flowing area or the dead zone in the actual storage tank 1 and in the VOF multiphase flow model.

[0046] Next, further determine the start time of the stirring device 2 installed in the storage tank 1.

[0047] According to the curve graph of the volume ratio of the original electrolyte in the simulated storage tank changing with time, the time when the volume ratio of the original electrolyte flowing out of the storage tank reaches a predetermined value (such as 90%) can be obtained, and this time can be used as the start time of the stirring device 2.

[0048] Due to the difference between the VOF multiphase flow model and the actual electrolyte outflow state, the start time of the stirring device 2 can be further optimized.

[0049] According to Figure 4 , when it is 40 min and the volume ratio of the original electrolyte flowing out of the storage tank reaches 90%, the outflow rate of the original electrolyte is slow. Therefore, during the process of the electrolyte flowing out of the actual storage tank 1, samples of the electrolyte can be taken at multiple time points before and after 40 min respectively from the outlet of the actual storage tank 1 (the storage tank 1 can be provided with an outlet for collecting the electrolyte). For example, samples can be taken at multiple time points such as 38 min, 39 min, 40 min, 41 min, and 42 min. After detecting the sampled electrolyte, it can be known that the volume ratio of the original electrolyte in the electrolyte sampled at 41 min is 10% (that is, the volume ratio of the outflowing original electrolyte is 90%), then the start time of the stirring device 2 can be determined to be when the circulation time of the electrolyte in the storage tank 1 reaches 41 min.

[0050] In addition, there are significant differences between the volume ratio of the electrolyte fluid flowing out with time obtained by sampling and detecting the electrolyte at multiple time points and the curve graph of the volume ratio of the original electrolyte flowing out changing with time obtained in the VOF multiphase flow model. The VOF multiphase flow model can also be optimized by modifying the model parameters.

[0051] The solution provided in the embodiment of the present application can effectively improve the charge and discharge efficiency of the flow battery system by setting the installation position of the stirring device 2 and the start time of the stirring device 2 in the electrolyte storage tank by means of simulation.

[0052] An embodiment of the present application also provides an electrolyte storage tank for a flow battery system, as Figure 5 shown, which includes a storage tank 1 and a stirring device 2 installed on the storage tank 1. Among them, the electrolyte storage tank is arranged by the method described above.

[0053] In one embodiment, the stirring device 2 includes a stirring component 21 installed inside the storage tank 1 and an electromagnetic driving mechanism 22 installed outside the storage tank 1. The electromagnetic driving mechanism 22 is configured to control the start and stop of the stirring component 21.

[0054] An embodiment of the present application also provides a flow battery system, as Figure 6 shown, which includes a stack 100, a positive electrolyte storage tank 200, and a negative electrolyte storage tank 300. Both the positive electrolyte storage tank 200 and the negative electrolyte storage tank 300 adopt the electrolyte storage tank described above.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0056] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include at least one such feature.

[0057] In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0061] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for setting an electrolyte storage tank, characterized in that: The electrolyte storage tank comprises a storage tank and a stirring device, wherein the stirring device is arranged to be installed on the storage tank to stir the electrolyte in the storage tank, and the method comprises: Establishing a tank geometry model of the storage tank; Based on the tank geometry model, simulating the fluid in the tank; A target area in which the fluid in the simulated storage tank is in a predetermined state is determined, and an installation position of the stirring device in the storage tank is determined based on the target area.

2. The method according to claim 1, characterized in that The simulating the fluid in the storage tank based on the storage tank geometric model includes: Based on the tank geometry model, a VOF multiphase flow model is established.

3. The method according to claim 1, characterized in that: Also includes: Determine the start time of the stirring device installed in the storage tank.

4. The method according to claim 3, characterized in that Determining the start time of the stirring device installed in the storage tank includes: Determine the time at which the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value; The start time of the stirring device installed in the storage tank is determined according to the time when the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value.

5. The method according to claim 4, characterized in that The step of determining the time at which the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value comprises: Obtain a schematic diagram of the change of the volume ratio of the original electrolyte in the simulated storage tank over time; The time at which the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value is determined according to the change schematic diagram.

6. The method according to claim 4, characterized in that The step of determining the start time of the stirring device installed in the storage tank according to the time when the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value comprises: Determining a plurality of sampling time points for sampling the electrolyte in the storage tank according to the time at which the volume ratio of the original electrolyte in the simulated fluid flowing out of the storage tank reaches a predetermined value; Sampling and testing the electrolyte in the storage tank at the plurality of sampling time points to obtain the actual time at which the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value; The actual time when the volume ratio of the original electrolyte flowing out of the storage tank reaches the predetermined value is used as the start-up time of the stirring device installed in the storage tank.

7. The method according to any one of claims 4 to 6, characterized in that: When the volume ratio of the original electrolyte flowing out of the storage tank in the simulated fluid reaches a predetermined value, the target area is determined.

8. An electrolyte storage tank for a liquid flow battery system, characterized in that: It comprises a storage tank and a stirring device installed on the storage tank, wherein the electrolyte storage tank is arranged by the method according to any one of claims 1-7.

9. The electrolyte storage tank according to claim 8, characterized in that: The stirring device comprises a stirring component installed in the storage tank and an electromagnetic driving mechanism installed outside the storage tank, and the electromagnetic driving mechanism is configured to control the start and stop of the stirring component through magnetic force.

10. A liquid flow battery system, characterized in that: It comprises a battery stack, a positive electrode electrolyte storage tank and a negative electrode electrolyte storage tank, wherein the positive electrode electrolyte storage tank and the negative electrode electrolyte storage tank are both electrolyte storage tanks according to claim 8 or 9.

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