Analysis method, device and storage medium for flow channel and flow field structure of liquid flow battery

Abstract

The present application relates to an analysis method, device and storage medium for the flow channel and flow field structure of a liquid flow battery. The method includes: for the mainstream area structure, according to the first design parameter of each flow channel in the mainstream area structure, the first relationship between the bypass current loss and the flow resistance loss, determine the target first design parameter of each flow channel in the mainstream area structure; for the distribution area structure, according to the second design parameter of each flow channel in the distribution area structure, the second relationship between the flow deviation of the flow channel and the flow resistance loss, determine the target second design parameter of each flow channel in the distribution area structure; for the reaction area structure, according to the third design parameter of the reaction area structure, the third relationship between the minimum concentration deviation of the conductor in the reaction area structure and the concentration polarization, determine the target third design parameter of the reaction area. The present method can optimize the structure of the liquid flow battery to reduce the concentration polarization of the liquid flow battery.

Description

Technical Field

[0001] The present application relates to the technical field of liquid flow batteries, and in particular to an analysis method, device and storage medium for a liquid flow battery flow channel and flow field structure. Background Art

[0002] Liquid flow battery is a kind of energy storage device that uses a circulating pump to make the electrolyte complete the redox reaction in the battery stack to achieve the conversion of electrical energy and chemical energy. It has the advantages of intrinsic safety, long service life, and suitability for large capacity and long-term energy storage. During the operation of liquid flow battery, sufficient active substances are required to participate in the reaction to reduce the voltage loss caused by concentration polarization. However, at the end of charging and discharging of high-power battery stacks or under high current density conditions, concentration polarization is the main form of voltage loss.

[0003] The existing design methods for liquid flow battery structures are mainly based on experience and experimental test parameters, or refer to the structural design of fuel cells. The structural design of liquid flow batteries often focuses on product sealing, without considering how to improve the performance of liquid flow batteries and how to reduce the concentration polarization of liquid flow batteries.

[0004] How to optimize the flow field structure of liquid flow batteries to reduce the concentration polarization of liquid flow batteries is still an urgent issue to be considered. Summary of the invention

[0005] Based on this, it is necessary to provide an analysis method, equipment and storage medium for the flow channel and flow field structure of a flow battery that can optimize the structure of the flow battery to reduce the concentration polarization of the flow battery in response to the above technical problems.

[0006] In a first aspect, the present application provides a method for analyzing a flow channel and a flow field structure of a flow battery, the method comprising:

[0007] For the mainstream area structure in the flow channel and flow field structure of the flow battery, a target first design parameter of each flow channel in the mainstream area structure is determined according to a first design parameter of each flow channel in the mainstream area structure, a first relationship between a bypass current loss and a flow resistance loss, a preset bypass current loss, and a preset first flow resistance loss; wherein the first design parameter includes at least one of a flow channel length of the mainstream area structure, a flow channel width of the mainstream area structure, or a flow channel depth of the mainstream area structure;

[0008] For the distribution area structure in the flow channel and flow field structure of the liquid flow battery, the target second design parameter of each flow channel in the distribution area structure is determined according to the second design parameter of each flow channel in the distribution area structure, the second relationship between the flow deviation and the flow resistance loss of the flow channel, the preset flow deviation and the preset second flow resistance loss; wherein the second design parameter includes at least one of the flow channel length of the distribution area structure, the flow channel width of the distribution area structure, the spacing between adjacent flow channels of the distribution area structure, or the number of flow channels of the distribution area structure;

[0009] For the reaction zone structure in the flow channel and flow field structure of the liquid flow battery, the target third design parameter of the reaction zone is determined according to the third design parameter of the reaction zone structure, the third relationship between the minimum concentration deviation of the conductor in the reaction zone structure and the concentration polarization, the preset concentration deviation and the preset concentration polarization; wherein the third design parameter includes at least one of the flow channel shape, the number of flow channels, the flow channel width, the flow channel length, the length of the liquid equalizing buffer port, the width of the liquid equalizing buffer port, the length of the distribution flow channel inlet or the width of the compensation flow channel port in the reaction zone structure; wherein the conductor is a conductive liquid.

[0010] In one embodiment, the first relationship includes the relationship between the first design parameter and the bypass current loss, and also includes the relationship between the first design parameter and the flow resistance loss; the method further includes:

[0011] Based on the first design parameters, an equivalent circuit model and a first flow resistance calculation model are established for each flow channel in the mainstream area structure;

[0012] For each flow channel in the mainstream area structure, applying the assumed first design parameter to the equivalent circuit model, and simulating the use process of the mainstream area structure to obtain a simulated bypass current loss; according to the assumed first design parameter and the simulated bypass current loss, obtaining a relationship between the first design parameter and the bypass current loss;

[0013] For each flow channel in the mainstream area structure, the assumed first design parameter is applied to the first flow resistance calculation model, and the use process of the mainstream area structure is simulated to obtain a simulated flow resistance loss; based on the assumed first design parameter and the simulated flow resistance loss, the relationship between the first design parameter and the flow resistance loss is obtained.

[0014] In one embodiment, the first design parameter includes a flow channel length and a flow channel width of the mainstream area structure, and the equivalent circuit model of each flow channel in the mainstream area structure is established based on the first design parameter, including:

[0015] For each flow channel in the mainstream area structure, a resistance model of the flow channel is established according to the conductor length, conductor cross-sectional area and conductor resistivity in the flow channel;

[0016] An equivalent circuit model of the flow channel is established according to the resistance model of the flow channel, the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure and the number of battery stack layers in the liquid flow battery.

[0017] In one embodiment, the first design parameter includes a flow channel length of the mainstream area structure, a flow channel width of the mainstream area structure, and a flow channel depth of the mainstream area structure, and a first flow resistance calculation model for each flow channel in the mainstream area structure is established based on the first design parameters, including:

[0018] For each flow channel in the mainstream area structure, a first flow resistance calculation model of the flow channel of the mainstream area structure is established according to the flow channel width of the mainstream area structure, the flow channel depth of the mainstream area structure, the flow channel length of the mainstream area structure, the resistivity of the conductor in the flow channel of the mainstream area structure, the average flow velocity of the conductor in the flow channel of the mainstream area structure, and the resistance coefficient along the way.

[0019] In one embodiment, the second relationship includes a relationship between the second design parameter and flow deviation, and a relationship between the second design parameter and flow resistance loss; the method further includes:

[0020] Establishing a first equivalent structural model of the distribution area structure based on the second design parameters, and establishing a second flow resistance calculation model of each flow channel in the distribution area structure based on the second design parameters;

[0021] Applying a plurality of different assumed second design parameters to the first equivalent structure model, and simulating the use process of the distribution area structure to obtain a plurality of simulated flow deviations for the conductor in the distribution area structure; determining the relationship between the second design parameter and the flow deviation according to the plurality of different second design parameters and the plurality of simulated flow deviations;

[0022] For each flow channel in the distribution area structure, the assumed second design parameters are applied to the second flow resistance calculation model, and the use process of the distribution area structure is simulated to obtain a simulated flow resistance loss; based on the assumed second design parameters and the simulated flow resistance loss, the relationship between the second design parameters and the flow resistance loss is determined.

[0023] In one embodiment, the use process of the simulated distribution area structure to obtain multiple simulated flow deviations for conductors in the distribution area structure includes:

[0024] Simulate the use process of the distribution area structure to obtain the simulated maximum flow and the simulated minimum flow of the conductor in the distribution area structure;

[0025] The simulated flow deviation is obtained according to the simulated maximum flow and the simulated minimum flow.

[0026] In one embodiment, the method further comprises:

[0027] Establishing a second equivalent structural model of the reaction zone structure according to the third design parameters, and applying the assumed plurality of the third design parameters to the second equivalent structural model;

[0028] For each of the third design parameters assumed, the concentration distribution data of the conductor in the reaction zone structure is obtained by simulation;

[0029] For each concentration distribution data, determine the simulated minimum concentration of the conductor in the reaction zone structure and the simulated concentration of the conductor at the outlet according to the concentration distribution data; determine the simulated minimum concentration deviation of the conductor in the reaction zone structure according to the simulated minimum concentration and the simulated concentration of the conductor at the outlet; determine the simulated concentration polarization based on the simulated minimum concentration deviation;

[0030] The third relationship is determined based on a plurality of assumed third design parameters, a simulated minimum concentration deviation corresponding to each of the assumed third design parameters, and a simulated concentration polarization corresponding to each of the assumed third design parameters.

[0031] In a second aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method described in the first aspect are implemented.

[0032] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method described in the first aspect.

[0033] In a fourth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the method described in the first aspect.

[0034] The above-mentioned analysis method, equipment and storage medium of the flow channel and flow field structure of the flow battery, by combining the design parameters with the design requirements, enables the flow channel structure of the flow battery to accurately meet the design requirements and goals. Design requirements include preset bypass loss, preset first flow resistance loss, preset second flow resistance loss, preset flow deviation, preset concentration deviation and preset concentration polarization. By designing the flow channel and flow field structure of the flow battery by the method provided in this embodiment, the uniformity of the flow velocity in the flow area can be improved, the dead zone of the reaction zone flow can be solved, the concentration of the substances involved in the reaction can be increased, and the concentration polarization can be reduced. In addition, the voltage efficiency and energy efficiency of the battery can also be improved. In particular, the development trend of flow batteries is that with the rapid improvement of the overall performance of flow batteries (electrolyte, electrode materials), high current density operation will become the mainstream trend, and it is necessary to refine and optimize the design parameters to improve the performance of flow batteries. Therefore, the method provided in this embodiment is suitable for the development trend of flow batteries and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A diagram of an application environment of a method for analyzing a flow channel and a flow field structure of a flow battery in one embodiment;

[0037] Figure 2 A schematic diagram of a flow chart of a method for analyzing a flow channel and a flow field structure of a flow battery in one embodiment;

[0038] Figure 3 A schematic diagram of a flow channel structure of a liquid flow battery in one embodiment;

[0039] Figure 4 A partial schematic diagram of the reaction zone structure in the flow channel and flow field structure of a liquid flow battery in one embodiment;

[0040] Figure 5 A schematic diagram of a portion of the flow chart of a method for analyzing a flow channel and a flow field structure of a flow battery in one embodiment;

[0041] Figure 6 A schematic diagram of the relationship between flow channel length and current efficiency in one embodiment;

[0042] Figure 7 A schematic diagram of the relationship between flow channel width and current efficiency in one embodiment;

[0043] Figure 8A schematic diagram of the relationship between the flow channel length and the flow resistance loss in one embodiment;

[0044] Fig. 9 A schematic diagram of the relationship between flow channel width and flow resistance loss in one embodiment;

[0045] Fig.10 A schematic diagram of a portion of the flow chart of a method for analyzing a flow channel and a flow field structure of a flow battery in one embodiment;

[0046] Fig.11 A schematic diagram of a portion of the flow chart of a method for analyzing a flow channel and a flow field structure of a flow battery in one embodiment;

[0047] Fig.12 A partial schematic diagram of the reaction zone structure in the flow channel and flow field structure of a liquid flow battery in one embodiment;

[0048] Fig.13 A partial schematic diagram of the reaction zone structure in the flow channel and flow field structure of a liquid flow battery in one embodiment;

[0049] Fig.14 A structural block diagram of a device for analyzing a flow channel and a flow field structure of a liquid flow battery in one embodiment;

[0050] Fig.15 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] The analysis method of the flow channel and flow field structure of the flow battery provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. The server 104 can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services.

[0053] In an exemplary embodiment, Figure 2 As shown, a method for analyzing the flow channel and flow field structure of a flow battery is provided.

[0054] This method is used to analyze the flow channel structure of liquid flow batteries. Figure 3, the liquid flow battery flow channel structure provided in this embodiment includes 2 mainstream area structures, 2 distribution area structures and a reaction area structure. The liquid flow battery flow channel structure includes an inlet side and an outlet side of the electrode frame, the inlet side is provided with a mainstream area structure and a distribution area structure, and the outlet side is provided with a mainstream area structure and a distribution area structure. The conductor (i.e., conductive liquid) enters from the inlet side, flows to the outlet side, and finally flows out through the outlet side. The distribution area structure is connected to the mainstream area structure, and the reaction area structure is connected to the distribution area structure. The mainstream area structure includes multiple flow channels, and the reaction area structure includes multiple flow channels. The distribution area structure includes multiple openings, and the opening refers to the opening of the flow channel. The liquid flow battery flow channel structure also includes structures such as a reaction zone electrode plate, a reaction zone end, a reaction zone liquid inlet, a distribution channel liquid inlet, and an inner edge of a distribution channel.

[0055] Figure 3 W represents the width of the flow channel in the reaction zone structure, L1 represents the interval width between adjacent flow channels whose flow channel inlets are on the same side in the reaction zone structure, and L3 represents the width of the flow channel in the reaction zone structure.

[0056] This method is applied to Figure 1 The terminal 102 in the example is used as an example to illustrate, including the following steps 201 to 203. Among them:

[0057] Step 201, for the mainstream area structure in the flow channel and flow field structure of the liquid flow battery, determine the target first design parameter of each flow channel in the mainstream area structure according to the first design parameter of each flow channel in the mainstream area structure, the first relationship between the bypass current loss and the flow resistance loss, the preset bypass current loss and the preset first flow resistance loss.

[0058] The bypass current, also called leakage current, is an additional current flow caused by factors such as materials, design or temperature. This current does not participate in the normal operation of the main circuit, but consumes energy and may cause circuit instability and reduced efficiency. The bypass current loss is the energy loss caused by this additional current flow. The bypass current loss described in this step refers to the bypass current loss of the mainstream area structure.

[0059] The flow resistance loss is also called flow resistance loss, which is the energy loss caused by friction, collision, eddy current and other factors in the flow process of the fluid. The flow resistance loss described in this step refers to the flow resistance loss of the mainstream area structure.

[0060] The first design parameter includes at least one of the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure, or the flow channel depth of the mainstream area structure. The first relationship includes the relationship between the first design parameter and the bypass current loss, and the relationship between the first design parameter and the flow resistance loss.

[0061] The first relationship can be obtained through a large number of simulation experiments, for example, after constructing an equivalent circuit model of the mainstream area structure according to the first design parameter, and then applying the assumed first design parameter to the equivalent circuit model, the operation of the mainstream area structure is simulated based on the equivalent circuit model to obtain simulated bypass current loss and flow resistance loss. After multiple simulations, based on the assumed first design parameter, the simulated bypass current loss and flow resistance loss, the relationship between the first design parameter and the bypass current loss can be obtained, and the relationship between the first design parameter and the flow resistance loss can also be obtained.

[0062] The preset bypass current loss and the preset first flow resistance loss can be set according to actual needs, and this embodiment does not limit them. Optionally, the preset bypass current loss is 5%, and the first flow resistance loss is 10 kilopascals (kPa).

[0063] If in a certain simulation, the simulated bypass current loss is less than the preset bypass current loss, and the simulated flow resistance loss is less than the first flow resistance loss, the assumed first design parameters used in the simulation are used as the target first design parameters.

[0064] Step 202, for the distribution area structure in the flow channel and flow field structure of the liquid flow battery, determine the target second design parameter of each flow channel in the distribution area structure according to the second design parameter of each flow channel in the distribution area structure, the second relationship between the flow deviation and the flow resistance loss of the flow channel, the preset flow deviation and the preset second flow resistance loss.

[0065] The second design parameter includes at least one of a flow channel width of the distribution area structure, a spacing between adjacent flow channels of the distribution area structure, or a number of flow channels of the distribution area structure.

[0066] Among them, flow deviation refers to the difference between actual flow and designed flow, average flow or theoretical flow. It is an important indicator for evaluating the uniformity of fluid distribution.

[0067] The second relationship can be obtained through a large number of simulation experiments, for example, after constructing a first equivalent structural model of the distribution area structure according to the second design parameter, and then applying the assumed second design parameter to the first equivalent structural model, the operation of the distribution area structure is simulated based on the first equivalent structural model to obtain simulated flow deviation and flow resistance loss. After multiple simulations, based on the assumed second design parameter, the simulated flow deviation and flow resistance loss, the relationship between the second design parameter and the flow deviation can be obtained, and the relationship between the second design parameter and the flow resistance loss can also be obtained.

[0068] The preset flow deviation and the preset second flow resistance loss can be set according to actual needs, and this embodiment does not limit them. Optionally, the preset flow deviation is 10%, and the preset second flow resistance loss is 10 kilopascals (kPa).

[0069] If in a certain simulation, the simulated flow deviation is smaller than the preset flow deviation, and the simulated flow resistance loss is smaller than the second flow resistance loss, the assumed second design parameters used in the simulation are used as the target second design parameters.

[0070] Step 203, for the reaction zone structure in the flow channel and flow field structure of the liquid flow battery, determine the target third design parameter of the reaction zone according to the third design parameter of the reaction zone structure, the third relationship between the minimum concentration deviation and concentration polarization of the conductor in the reaction zone structure, the preset concentration deviation and the preset concentration polarization.

[0071] Among them, the third design parameter includes at least one of the flow channel shape, the number of flow channels, the flow channel width, the flow channel length, the length of the liquid equalization buffer port, the width of the liquid equalization buffer port, the length of the distribution flow channel inlet or the width of the compensation flow channel port in the reaction zone structure.

[0072] For the location of the equalizing buffer port, the location of the distribution channel inlet port, and the location of the compensation channel port, please refer to Figure 4 Structural diagram of the reaction zone structure shown. Figure 4 W represents the width of the flow channel in the reaction zone, L1 represents the length of the interdigitated end in the reaction zone structure, L2 represents the length of the liquid equalization buffer port, L3 represents the length of the distribution flow channel inlet, and L4 represents the width of the compensation flow channel port. In one embodiment, W = 0.5 mm ~ 4 mm, L1 = 3W ~ 20W, L2 = 0.5L1 ~ 0.9L1, L3 = 0.8W ~ 2W, L4 = 0.1L3 ~ 0.5L3.

[0073] like Figure 4 As shown, the flow channel structure of the liquid flow battery also includes structures such as a reaction zone plate, a reaction zone end, a reaction zone liquid inlet, and an inner edge of a distribution channel.

[0074] The third relationship can be obtained through a large number of simulation experiments, for example, after constructing a second equivalent structure model of the reaction zone structure according to the third design parameter, and then applying the assumed third design parameter to the second equivalent structure model, the operation of the reaction zone structure is simulated based on the second equivalent structure model to obtain simulated concentration deviation and concentration polarization. After multiple simulations, based on the assumed third design parameter, the simulated concentration deviation and concentration polarization, the relationship between the third design parameter and the concentration deviation can be obtained, and the relationship between the third design parameter and the concentration polarization can also be obtained.

[0075] The preset concentration deviation and the preset concentration polarization can be set according to actual needs, and are not limited in this embodiment. Optionally, the preset concentration deviation is 5%, and the preset concentration polarization is 0.05V.

[0076] If in a certain simulation, the simulated concentration deviation is smaller than the preset concentration deviation, and the simulated concentration polarization is smaller than the preset concentration polarization, the assumed third design parameters used in the simulation are used as the target third design parameters.

[0077] Finally, the flow channel structure of the liquid flow battery is determined according to the first design parameter of the main flow area structure, the second design parameter of the distribution area structure and the third design parameter of the reaction area structure.

[0078] As mentioned above, the analysis method of the flow channel and flow field structure of the flow battery provided in this embodiment combines the design parameters with the design requirements, so that the flow channel structure of the flow battery can accurately meet the design requirements and goals. Design requirements include preset bypass loss, preset first flow resistance loss, preset second flow resistance loss, preset flow deviation, preset concentration deviation and preset concentration polarization. By designing the flow channel structure of the flow battery by the method provided in this embodiment, the uniformity of the flow velocity in the flow area can be improved, the dead zone of the reaction zone flow can be solved, the concentration of the substances involved in the reaction can be increased, and the concentration polarization can be reduced. In addition, the voltage efficiency and energy efficiency of the battery can also be improved. In particular, the development trend of flow batteries is that with the rapid improvement of the overall performance of flow batteries (electrolyte, electrode materials), high current density operation will become the mainstream trend, and it is necessary to refine and optimize the design parameters to improve the performance of flow batteries. Therefore, the method provided in this embodiment is suitable for the development trend of flow batteries and has high practicality.

[0079] In an exemplary embodiment, the first relationship includes a relationship between the first design parameter and a bypass current loss, and also includes a relationship between the first design parameter and a flow resistance loss.

[0080] like Figure 5 As shown, the analysis method of the flow channel and flow field structure of the flow battery also includes:

[0081] Step 501: Based on the first design parameter, an equivalent circuit model and a first flow resistance calculation model of each flow channel in the mainstream area structure are established.

[0082] For each flow channel, a resistance model of the flow channel is established based on the length of the conductor, the cross-sectional area of ​​the conductor and the resistivity of the conductor in the flow channel. The established resistance model of the flow channel is R=ρ×L / S, where L represents the length of the conductor (i.e., the conductive liquid) in the flow channel, S represents the cross-sectional area of ​​the conductor in the flow channel, and ρ represents the resistivity of the conductor. An equivalent circuit model of the flow channel is established based on the resistance model of the flow channel, the length of the flow channel, the width of the flow channel and the number of battery stack layers in the flow battery. Among them, the relationship between the bypass current and the number of battery stack layers is known. Based on the resistance model and the number of battery stack layers in the flow battery, the equivalent circuit model can be established in a one-dimensional simulation software, and the relationship between the flow channel length and the flow channel width is introduced into the equivalent circuit model.

[0083] For each flow channel, a first flow resistance calculation model of the flow channel is established according to the flow channel width, flow channel depth, flow channel length, resistivity of the conductor in the flow channel, average flow velocity of the conductor in the flow channel and the resistance coefficient along the flow channel.

[0084] In the first flow resistance calculation model, the flow resistance loss can be expressed as .in, represents the flow resistance loss, represents the resistance coefficient along the way, Indicates the flow channel depth, Indicates the flow channel width, represents the resistivity of the conductor in the flow channel, It represents the average flow velocity in the conductor.

[0085] Step 502, for each flow channel, apply the assumed first design parameter to the equivalent circuit model, and simulate the use process of the mainstream area structure to obtain a simulated bypass current loss; based on the assumed first design parameter and the simulated bypass current loss, obtain the relationship between the first design parameter and the bypass current loss.

[0086] The assumed first design parameter is applied to the equivalent circuit model, and one-dimensional simulation software (1D software, such as AMEsim one-dimensional software) is used to simulate the use process of the mainstream area structure, and the relationship between the first design parameter and the current efficiency is analyzed. Bypass current loss = 1-current efficiency.

[0087] The relationship between the analyzed flow channel length (200 mm ~ 400 mm) and the current efficiency is as follows Figure 6 The relationship between the analyzed flow channel width (8 mm to 20 mm) and the current efficiency is shown in Figure 7 As shown, the relationship between the first design parameter and the bypass current loss is obtained. Figure 6 The horizontal axis represents the flow channel length, and the vertical axis represents the current efficiency. Figure 7 The horizontal axis represents the channel width, and the vertical axis represents the current efficiency.

[0088] Step 503, for each flow channel, apply the assumed first design parameter to the first flow resistance calculation model, and simulate the use process of the mainstream area structure to obtain a simulated flow resistance loss; based on the assumed first design parameter and the simulated flow resistance loss, obtain the relationship between the first design parameter and the flow resistance loss.

[0089] The assumed first design parameter is applied to the first flow resistance calculation model, and one-dimensional simulation software (1D software, such as AMEsim one-dimensional software) is used to simulate the use process of the mainstream area structure, and the relationship between the first design parameter and the flow resistance loss is analyzed. The flow resistance loss of the mainstream area structure on the inlet side or the outlet side must be less than 5kPa.

[0090] The relationship between the analyzed flow channel length (200 mm ~ 400 mm) and the flow resistance loss is as follows Figure 8 The relationship between the analyzed flow channel width (8 mm to 20 mm) and the flow resistance loss is shown in Fig. 9 shown.

[0091] In this embodiment, one-dimensional simulation software can be used to establish an equivalent circuit model and a first flow resistance calculation model for each flow channel in the mainstream area structure. After simulating the use process of the mainstream area structure according to the assumed first design parameter to obtain the simulated bypass current loss, the relationship between the first design parameter and the bypass current loss can be obtained. After simulating the use process of the mainstream area structure according to the assumed first design parameter to obtain the simulated flow resistance loss, the relationship between the first design parameter and the flow resistance loss can be obtained. The use process of the mainstream area structure is simulated by simulation software, which supports accurately achieving design requirements and goals by changing the first design parameter, so that the flow battery can adapt to different scenarios.

[0092] In an exemplary embodiment, the second relationship includes a relationship between the second design parameter and flow deviation, and a relationship between the second design parameter and flow resistance loss.

[0093] like Fig.10 As shown, the analysis method of the flow channel and flow field structure of the flow battery also includes:

[0094] Step 1001: Establish a first equivalent structural model of the distribution area structure based on the second design parameters, and establish a second flow resistance calculation model of each flow channel in the distribution area structure based on the second design parameters.

[0095] To design the staggered flow channel structure and ensure the uniformity of flow in each flow channel, the distribution area needs to be optimized.

[0096] For the distribution area structure, the flow channel length L, flow channel width d, the spacing W between adjacent flow channels and the number of flow channels N have a great influence on the uniformity of flow distribution. Different first equivalent structure models are established according to different L, d, W and N models, and the first equivalent structure model is simulated and analyzed using CFD (Computational Fluid Dynamics) fluid simulation software to calculate different flow sizes under rated working flow.

[0097] Step 1002, applying the assumed multiple different second design parameters to the first equivalent structure model, and simulating the use process of the distribution area structure to obtain multiple simulated flow deviations for the conductor in the distribution area structure; and determining the relationship between the second design parameter and the flow deviation based on the multiple different second design parameters and the multiple simulated flow deviations.

[0098] According to the design requirements (for example, the flow deviation needs to be less than 10%), the simulated flow deviation η=2×(Vmax-Vmin) / (Vmax+Vmin)×100% is calculated. Vmax represents the maximum flow, and Vmin represents the minimum flow. The use process of the simulated distribution area structure is simulated to obtain the simulated maximum flow and simulated minimum flow of the conductor in the distribution area structure. According to the simulated maximum flow and simulated minimum flow, the simulated flow deviation is obtained.

[0099] In one example, see the experimental data shown in Table 1, where multiple assumed second design parameters correspond to different simulated flow deviations. In the table, the units of length L1 and spacing D2 are millimeters (mm). N represents the number of flow channels in the distribution area structure, length L1 represents the flow channel length of the distribution area structure, and spacing D2 represents the spacing between adjacent flow channels of the distribution area structure.

[0100] Table 1

[0101]

[0102] Step 1003, for each flow channel, apply the assumed second design parameters to the second flow resistance calculation model, and simulate the use process of the distribution area structure to obtain a simulated flow resistance loss; based on the assumed second design parameters and the simulated flow resistance loss, determine the relationship between the second design parameters and the flow resistance loss.

[0103] In the second flow resistance calculation model, the flow resistance loss can be expressed as .in, represents the flow resistance loss, represents the resistance coefficient along the way, Indicates the flow channel depth, Indicates the flow channel width, represents the resistivity of the conductor in the flow channel, It represents the average flow velocity in the conductor.

[0104] The assumed second design parameter is applied to the second flow resistance calculation model, and CFD simulation software can be used to perform parameter simulation analysis to obtain simulated flow resistance loss. The flow resistance loss of the mainstream area structure on the inlet side or outlet side must be less than 5 kPa.

[0105] In this embodiment, the first equivalent structural model and the second flow resistance calculation model of the distribution area structure can be established by using CFD simulation software. After simulating the use process of the distribution area structure according to the assumed second design parameter to obtain the simulated flow deviation, the relationship between the second design parameter and the flow deviation can be obtained. After simulating the use process of the distribution area structure according to the assumed second design parameter to obtain the simulated flow resistance loss, the relationship between the second design parameter and the flow resistance loss can be obtained. The use process of the distribution area structure is simulated by simulation software, which supports accurately achieving design requirements and goals by changing the second design parameter, so that the liquid flow battery can adapt to different scenarios.

[0106] In an exemplary embodiment, Fig.11 As shown, the analysis method of the flow channel and flow field structure of the flow battery also includes:

[0107] Step 1101: establish a second equivalent structural model of the reaction zone structure according to the third design parameters, and apply the assumed plurality of the third design parameters to the second equivalent structural model.

[0108] The design of the reaction zone directly affects the local concentration polarization. Different flow models have different local concentration characteristics, and different local characteristic structures need to be designed to eliminate local high concentration polarization. Regarding how the staggered flow channel can improve the local concentration, the staggered flow channel model, i.e., the second equivalent structure model, is first established, and then the Comsol simulation analysis software is used to model and perform model simulation analysis to form the first concentration analysis and generate the concentration field.

[0109] Step 1102: For each of the assumed third design parameters, simulate and obtain the concentration distribution data of the conductor in the reaction zone structure.

[0110] Based on the generated concentration field, the concentration profile data of the conductor can be displayed. The concentration profile data shows the local concentration. In one example, there is a low point of concentration in the area where the reaction zone structure contacts the distribution zone structure.

[0111] Step 1103, for each concentration distribution data, determine the simulated minimum concentration of the conductor in the reaction zone structure and the simulated concentration of the conductor at the outlet according to the concentration distribution data; determine the simulated minimum concentration deviation of the conductor in the reaction zone structure according to the simulated minimum concentration and the simulated concentration of the conductor at the outlet; and determine the simulated concentration polarization based on the simulated minimum concentration deviation.

[0112] Different structures are designed for the low-concentration area, and different structures are parameterized and customized. According to the characteristics of the low-concentration area, different optimized structural schemes can be formulated, and one optimized structural scheme corresponds to one third design parameter.

[0113] For example, in method 1, the electrode structure is improved to optimize the local design and increase the reserved rectangular (or trapezoidal) flow channel area in the middle (see Fig.12 ). At the same time, a second equivalent structural model is established when L2 and L4 are different in the figure, forming a parameter optimization point with L2 and L4 as variables. Fig.12 W represents the width of the flow channel in the reaction zone, L1 represents the length of the interdigitated end in the reaction zone structure, L2 represents the length of the liquid balancing buffer port, H represents the width of the liquid balancing buffer port, L3 represents the length of the liquid inlet of the distribution channel, and L4 represents the width of the compensation channel port. In one embodiment, W = 0.5mm~4mm, L1 = 3W~20W, L2 = 0.5L1~0.9L1, L3 = 0.8W~2W, L4 = 0.1L3~0.5L3, H = 0.5mm~4mm.

[0114] For example, in method 2, the electrode plate frame structure is improved to optimize the local concentration and multiple openings are added to form a multi-channel area (see Fig.13 ) to solve the problem of low local concentration. A second equivalent structural model is established with the number N (3 arrows pointing to 3 openings) and the opening diameter d different to form a parameter optimization point with N and d as variables.

[0115] The second equivalent structure models established in different ways were analyzed using electrochemical simulation software.

[0116] According to the design system application, a judgment formula is formulated for the simulation concentration, that is, when the local minimum concentration is not less than 10%, η Cr =(Cr (出口) -Cr (min) ) / Cr (出口) , this judgment formula is used to express the difference ratio between the outlet concentration and the minimum concentration, η Cr The lower the Cr, the better the performance of the flow battery. (出口) Indicates the outlet concentration, Cr (min) represents the minimum concentration, η Cr It represents the difference ratio between the outlet concentration and the minimum concentration.

[0117] The third design parameters that do not meet the requirements (local minimum concentration is not less than 10%) are screened among the multiple assumed third design parameters, and η is selected in combination with processability and material properties. Cr The optimal structural solution when it is the lowest (corresponding to the third design parameter).

[0118] Then use the concentration polarization formula , calculate the concentration polarization corresponding to the optimized structural scheme. In the formula is the gas constant, Indicates temperature, represents the number of electrons, is the Faraday constant, represents the local current density, represents the mass transfer coefficient, represents the local concentration of vanadium ions.

[0119] Step 1104 , determining the third relationship according to the plurality of assumed third design parameters, the simulated minimum concentration deviation corresponding to each of the assumed third design parameters, and the simulated concentration polarization corresponding to each of the assumed third design parameters.

[0120] By means of Comsol software analysis and calculation, the simulated minimum concentration deviation and the simulated concentration polarization can be obtained. The third relationship can be determined according to the assumed plurality of the third design parameters, the simulated minimum concentration deviation and the simulated concentration polarization.

[0121] In this embodiment, by establishing a second equivalent structural model of the reaction zone structure, after simulating the use process of the reaction zone structure according to the assumed third design parameter to obtain the simulated minimum concentration deviation, the relationship between the third design parameter and the minimum concentration deviation can be obtained. After simulating the use process of the reaction zone structure according to the assumed third design parameter to obtain the simulated concentration polarization, the relationship between the third design parameter and the simulated concentration polarization can be obtained. The use process of the reaction zone structure is simulated in a simulation manner, and it is supported to accurately achieve the design requirements and goals by changing the third design parameter, so that the liquid flow battery can adapt to different scenarios.

[0122] For ease of understanding, the following is a detailed description of the analysis method of the flow channel and flow field structure of the flow battery with a more specific embodiment. The analysis method of the flow channel and flow field structure of the flow battery is used to design the flow channel structure of the flow battery. For the main channel structure, the first design parameter is determined to include the flow channel length of the main flow area structure and the flow channel width of the main flow area structure. AMEsim one-dimensional software is used for simulation optimization, and the bypass current loss is set to be less than 5% (the preset bypass current loss is 5%), and the flow resistance loss of the main flow area structure in the import side or the export side is set to be less than 5kPa (the preset first flow resistance loss is 5kPa). Finally, the first design parameter of the main flow area structure is determined according to the results of the simulation optimization. For the distribution area structure, the second design parameter is determined to include the flow channel length of the distribution area structure, the spacing between adjacent flow channels of the distribution area structure, and the number of flow channels of the distribution area structure. CFD simulation software is used for parameter simulation analysis, and the flow deviation is set to be less than 10% (that is, the preset flow deviation is 10%), and the flow resistance loss of the main flow area structure in the import side or the export side is set to be less than 5kPa (the preset second flow resistance loss is 5kPa). Finally, the second design parameters of the distribution zone structure are determined according to the results of the simulation optimization. For the reaction zone structure, the third design parameters include the shape of the flow channel, the number of flow channels, the flow channel width, the flow channel length, the length of the equalizing buffer port, the width of the equalizing buffer port, the length of the distribution channel inlet or the width of the compensation channel port in the reaction zone structure. Electrochemical simulation software is used to perform parameter simulation analysis, and the minimum concentration deviation is set to be less than 5% (the preset concentration deviation is 5%), and the concentration polarization is set to be less than 0.05V (the preset concentration polarization is 0.05V). Finally, the third design parameters of the reaction zone structure are determined according to the results of the simulation optimization.

[0123] Finally, the flow channel and flow field structure of the flow battery are determined according to the first design parameters of the mainstream area structure, the second design parameters of the distribution area structure and the third design parameters of the reaction area structure.

[0124] It should be understood that, although the steps in the flowcharts involved in the embodiments described above are displayed in sequence according to the indications of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0125] Based on the same inventive concept, the embodiment of the present application also provides a device for analyzing the flow channel and flow field structure of a flow battery for realizing the above-mentioned method for analyzing the flow channel and flow field structure of a flow battery. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in the embodiments of one or more devices for analyzing the flow channel and flow field structure of a flow battery provided below can be referred to the above-mentioned limitations on the method for analyzing the flow channel and flow field structure of a flow battery, and will not be repeated here.

[0126] In an exemplary embodiment, Fig.14 As shown, a device 140 for analyzing the flow channel and flow field structure of a flow battery is provided, comprising: a first processing module 1401, a second processing module 1402 and a third processing module 1403, wherein:

[0127] The first processing module 1401 is used to determine the target first design parameter of each flow channel in the mainstream area structure of the liquid flow battery flow channel and flow field structure according to the first design parameter of each flow channel in the mainstream area structure, the first relationship between the bypass current loss and the flow resistance loss, the preset bypass current loss and the preset first flow resistance loss; wherein the first design parameter includes at least one of the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure or the flow channel depth of the mainstream area structure.

[0128] The second processing module 1402 determines the target second design parameter of each flow channel in the distribution area structure for the flow channel and flow field structure of the liquid flow battery according to the second design parameter of each flow channel in the distribution area structure, the second relationship between the flow deviation and the flow resistance loss of the flow channel, the preset flow deviation and the preset second flow resistance loss; wherein the second design parameter includes at least one of the flow channel length of the distribution area structure, the flow channel width of the distribution area structure, the spacing between adjacent flow channels of the distribution area structure, or the number of flow channels of the distribution area structure.

[0129] The third processing module 1403 is used to determine the target third design parameters of the reaction zone in the flow channel and flow field structure of the liquid flow battery according to the third design parameters of the reaction zone structure, the third relationship between the minimum concentration deviation of the conductor in the reaction zone structure and the concentration polarization, the preset concentration deviation and the preset concentration polarization; wherein the third design parameters include at least one of the flow channel shape, the number of flow channels, the flow channel width, the flow channel length, the length of the liquid equalizing buffer port, the width of the liquid equalizing buffer port, the length of the distribution channel inlet or the width of the compensation channel port in the reaction zone structure.

[0130] In some embodiments, the first relationship includes the relationship between the first design parameter and the bypass current loss, and also includes the relationship between the first design parameter and the flow resistance loss; the first processing module 1401 is also used to establish an equivalent circuit model and a first flow resistance calculation model for each flow channel in the mainstream area structure based on the first design parameter; for each flow channel, the assumed first design parameter is applied to the equivalent circuit model, and the use process of the mainstream area structure is simulated to obtain a simulated bypass current loss; based on the assumed first design parameter and the simulated bypass current loss, the relationship between the first design parameter and the bypass current loss is obtained; for each flow channel, the assumed first design parameter is applied to the first flow resistance calculation model, and the use process of the mainstream area structure is simulated to obtain a simulated flow resistance loss; based on the assumed first design parameter and the simulated flow resistance loss, the relationship between the first design parameter and the flow resistance loss is obtained.

[0131] In some embodiments, the first design parameter includes the flow channel length and the flow channel width of the mainstream area structure. The first processing module 1401 is used to establish a resistance model of the flow channel for each flow channel based on the conductor length, conductor cross-sectional area and conductor resistivity in the flow channel; and to establish an equivalent circuit model of the flow channel based on the resistance model of the flow channel, the flow channel length, the flow channel width and the number of battery stack layers in the liquid flow battery.

[0132] In some embodiments, the first design parameter includes the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure and the flow channel depth of the mainstream area structure. The first processing module 1401 is used to establish a first flow resistance calculation model of the flow channel for each flow channel according to the flow channel width, flow channel depth, flow channel length, resistivity of the conductor in the flow channel, average flow velocity of the conductor in the flow channel and the resistance coefficient along the way.

[0133] In some embodiments, the second relationship includes the relationship between the second design parameter and the flow deviation, and the relationship between the second design parameter and the flow resistance loss. The second processing module 1402 is also used to establish a first equivalent structure model of the distribution area structure based on the second design parameter, and establish a second flow resistance calculation model for each flow channel in the distribution area structure based on the second design parameter; apply a plurality of different assumed second design parameters to the first equivalent structure model, and simulate the use process of the distribution area structure to obtain a plurality of simulated flow deviations for the conductor in the distribution area structure; determine the relationship between the second design parameter and the flow deviation based on the plurality of different second design parameters and the plurality of simulated flow deviations; for each flow channel, apply the assumed second design parameter to the second flow resistance calculation model, and simulate the use process of the distribution area structure to obtain a simulated flow resistance loss; determine the relationship between the second design parameter and the flow resistance loss based on the assumed second design parameter and the simulated flow resistance loss.

[0134] In some embodiments, the second processing module 1402 is used to simulate the use process of the distribution area structure to obtain the simulated maximum flow and the simulated minimum flow of the conductor in the distribution area structure; and obtain the simulated flow deviation according to the simulated maximum flow and the simulated minimum flow.

[0135] In some embodiments, the third processing module 1403 is used to establish a second equivalent structural model of the reaction zone structure according to the third design parameters, and apply the assumed multiple third design parameters to the second equivalent structural model; for each assumed third design parameter, simulate and obtain the concentration distribution data of the conductor in the reaction zone structure; for each concentration distribution data, determine the simulated minimum concentration of the conductor in the reaction zone structure and the simulated concentration of the conductor at the outlet according to the concentration distribution data; determine the simulated minimum concentration deviation of the conductor in the reaction zone structure according to the simulated minimum concentration and the simulated concentration of the conductor at the outlet; determine the simulated concentration polarization based on the simulated minimum concentration deviation; determine the third relationship according to the assumed multiple third design parameters, the simulated minimum concentration deviation corresponding to each assumed third design parameter, and the simulated concentration polarization corresponding to each assumed third design parameter.

[0136] Each module in the above-mentioned flow battery flow channel and flow field structure analysis device 140 can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0137] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig.15As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for analyzing the flow channel and flow field structure of a liquid flow battery is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device.

[0138] Those skilled in the art will understand that Fig.15 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0139] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the method for analyzing the flow channel and flow field structure of a liquid flow battery provided in any of the above embodiments is implemented.

[0140] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method for analyzing the flow channel and flow field structure of a liquid flow battery provided in any of the above embodiments is implemented.

[0141] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, implements the method for analyzing the flow channel and flow field structure of a liquid flow battery provided in any of the above embodiments.

[0142] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0143] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 application.

[0144] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for analyzing the flow channel and flow field structure of a flow battery, characterized in that: The method comprises: For the mainstream area structure in the flow channel and flow field structure of the flow battery, a target first design parameter of each flow channel in the mainstream area structure is determined according to a first relationship of each flow channel in the mainstream area structure, a preset bypass current loss and a preset first flow resistance loss; the first relationship includes a relationship between the first design parameter and the bypass current loss, and also includes a relationship between the first design parameter and the flow resistance loss; wherein the first design parameter includes at least one of a flow channel length of the mainstream area structure, a flow channel width of the mainstream area structure or a flow channel depth of the mainstream area structure; For the distribution area structure in the flow channel and flow field structure of the liquid flow battery, the target second design parameter of each flow channel in the distribution area structure is determined according to the second design parameter of each flow channel in the distribution area structure, the second relationship between the flow deviation and the flow resistance loss of the flow channel, the preset flow deviation and the preset second flow resistance loss; wherein the second design parameter includes at least one of the flow channel length of the distribution area structure, the flow channel width of the distribution area structure, the spacing between adjacent flow channels of the distribution area structure, or the number of flow channels of the distribution area structure; For the reaction zone structure in the flow channel and flow field structure of the liquid flow battery, the target third design parameter of the reaction zone is determined according to the third design parameter of the reaction zone structure, the third relationship between the minimum concentration deviation of the conductor in the reaction zone structure and the concentration polarization, the preset concentration deviation and the preset concentration polarization; wherein the third design parameter includes at least one of the flow channel shape, the number of flow channels, the flow channel width, the flow channel length, the length of the liquid equalizing buffer port, the width of the liquid equalizing buffer port, the length of the distribution flow channel inlet or the width of the compensation flow channel port in the reaction zone structure; wherein the conductor is a conductive liquid.

2. The method according to claim 1, characterized in that: The method further comprises: Based on the first design parameters, an equivalent circuit model and a first flow resistance calculation model are established for each flow channel in the mainstream area structure; For each flow channel in the mainstream area structure, applying the assumed first design parameter to the equivalent circuit model, and simulating the use process of the mainstream area structure to obtain a simulated bypass current loss; according to the assumed first design parameter and the simulated bypass current loss, obtaining a relationship between the first design parameter and the bypass current loss; For each flow channel in the mainstream area structure, the assumed first design parameter is applied to the first flow resistance calculation model, and the use process of the mainstream area structure is simulated to obtain a simulated flow resistance loss; based on the assumed first design parameter and the simulated flow resistance loss, the relationship between the first design parameter and the flow resistance loss is obtained.

3. The method according to claim 2, characterized in that The first design parameter includes a flow channel length and a flow channel width of the mainstream area structure, and the equivalent circuit model of each flow channel in the mainstream area structure is established based on the first design parameter, including: For each flow channel in the mainstream area structure, a resistance model of the flow channel is established according to the conductor length, conductor cross-sectional area and conductor resistivity in the flow channel; An equivalent circuit model of the flow channel is established according to the resistance model of the flow channel, the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure and the number of battery stack layers in the liquid flow battery.

4. The method according to claim 2, characterized in that: The first design parameters include the flow channel length of the mainstream area structure, the flow channel width of the mainstream area structure, and the flow channel depth of the mainstream area structure. A first flow resistance calculation model for each flow channel in the mainstream area structure is established based on the first design parameters, including: For each flow channel in the mainstream area structure, a first flow resistance calculation model of the flow channel of the mainstream area structure is established according to the flow channel width of the mainstream area structure, the flow channel depth of the mainstream area structure, the flow channel length of the mainstream area structure, the resistivity of the conductor in the flow channel of the mainstream area structure, the average flow velocity of the conductor in the flow channel of the mainstream area structure, and the resistance coefficient along the way.

5. The method according to claim 1, characterized in that The second relationship includes a relationship between the second design parameter and flow deviation, and a relationship between the second design parameter and flow resistance loss; The method further comprises: Establishing a first equivalent structural model of the distribution area structure based on the second design parameters, and establishing a second flow resistance calculation model of each flow channel in the distribution area structure based on the second design parameters; Applying a plurality of different assumed second design parameters to the first equivalent structure model, and simulating the use process of the distribution area structure to obtain a plurality of simulated flow deviations for the conductor in the distribution area structure; determining the relationship between the second design parameter and the flow deviation according to the plurality of different second design parameters and the plurality of simulated flow deviations; For each flow channel in the distribution area structure, the assumed second design parameters are applied to the second flow resistance calculation model, and the use process of the distribution area structure is simulated to obtain a simulated flow resistance loss; based on the assumed second design parameters and the simulated flow resistance loss, the relationship between the second design parameters and the flow resistance loss is determined.

6. The method according to claim 5, characterized in that The process of using the simulated distribution area structure to obtain multiple simulated flow deviations for conductors in the distribution area structure includes: Simulate the use process of the distribution area structure to obtain the simulated maximum flow and the simulated minimum flow of the conductor in the distribution area structure; The simulated flow deviation is obtained according to the simulated maximum flow and the simulated minimum flow.

7. The method according to claim 1, characterized in that The method further comprises: Establishing a second equivalent structural model of the reaction zone structure according to the third design parameters, and applying the assumed plurality of the third design parameters to the second equivalent structural model; For each of the third design parameters assumed, the concentration distribution data of the conductor in the reaction zone structure is obtained by simulation; For each concentration distribution data, determine the simulated minimum concentration of the conductor in the reaction zone structure and the simulated concentration of the conductor at the outlet according to the concentration distribution data; determine the simulated minimum concentration deviation of the conductor in the reaction zone structure according to the simulated minimum concentration and the simulated concentration of the conductor at the outlet; determine the simulated concentration polarization based on the simulated minimum concentration deviation; The third relationship is determined based on a plurality of assumed third design parameters, a simulated minimum concentration deviation corresponding to each of the assumed third design parameters, and a simulated concentration polarization corresponding to each of the assumed third design parameters.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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