Flow cell runner arrangement method and device, flow cell and cell stack

Abstract

The invention relates to a flow cell runner arrangement method and device, a flow cell and a cell stack.The method comprises the steps that parameter information of electrolyte in the flow cell and the electrochemical reaction rate between the electrolyte and electrodes of the flow cell are obtained, and according to the parameter information and the electrochemical reaction rate, the flow cell runner of the flow cell is obtained; and determining flow channel plate arrangement information of a plurality of electrode flow channel plates in the battery flow channel, and generating flow channel arrangement information of the flow battery based on the arrangement information of the electrode flow channel plates.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and more specifically, to a method, apparatus, flow battery, and battery stack for arranging flow channels in a flow battery. Background Technology

[0002] Flow batteries are widely used in new energy power generation and other fields due to their advantages such as large capacity, wide range of applications, and long cycle life. To improve the performance of flow batteries, flow channels are usually added to the electrodes to change the flow path of the electrolyte and increase the power density of the battery.

[0003] However, adding flow channels reduces the contact area between the electrodes and the plates, affecting the uniformity of electrolyte flow and potentially increasing the battery's internal resistance. Furthermore, the differences in electrolyte properties and electrochemical reaction rates at the two electrodes can hinder the full progress of the electrochemical reaction, potentially limiting battery performance. Summary of the Invention

[0004] In order to overcome the problems existing in the related technologies, this disclosure provides a method, apparatus, flow battery and battery stack for arranging flow channels in a flow battery.

[0005] According to a first aspect of the present disclosure, a method for arranging flow channels in a flow battery is provided, comprising: acquiring parameter information of an electrolyte in the flow battery and an electrochemical reaction rate between the electrolyte and the electrodes of the flow battery; determining flow channel plate arrangement information of a plurality of electrode flow channel plates in the battery flow channel based on the parameter information and the electrochemical reaction rate; and generating flow channel arrangement information of the flow battery based on the flow channel plate arrangement information, wherein the flow channel arrangement information is used to arrange the battery flow channels of the flow battery.

[0006] Optionally, the parameter information includes the characteristic concentration of a characteristic substance in the electrolyte, the characteristic substance including reactant ions participating in the electrochemical reaction in the electrolyte; the flow channel plate arrangement information includes the flow channel number ratio of the number of first flow channels in the first electrode flow channel plate to the number of second flow channels in the second electrode flow channel plate; determining the flow channel plate arrangement information of multiple electrode flow channel plates in the battery flow channel based on the parameter information and the electrochemical reaction rate includes: determining the flow channel number ratio based on the characteristic concentration and the electrochemical reaction rate.

[0007] Optionally, the electrochemical reaction rate includes a first electrochemical reaction rate between the electrolyte and the first electrode and a second electrochemical reaction rate between the electrolyte and the second electrode; the characteristic concentration includes a first characteristic concentration of the electrolyte at the first electrode and a second characteristic concentration of the electrolyte at the second electrode; determining the flow channel number ratio based on the characteristic concentration and the electrochemical reaction rate includes: determining the cross-sectional area ratio of the first cross-sectional area of ​​the first electrode flow channel plate to the second cross-sectional area of ​​the second electrode flow channel plate based on the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate, and the second electrochemical reaction rate; and determining the flow channel number ratio based on the cross-sectional area ratio.

[0008] Optionally, determining the flow channel number ratio based on the cross-sectional area ratio includes: obtaining the flow channel width ratio of the first flow channel width of the first electrode flow channel plate to the second flow channel width of the second electrode flow channel plate; obtaining the flow channel thickness ratio of the first flow channel plate thickness of the first electrode flow channel plate to the second flow channel plate thickness of the second electrode flow channel plate; and determining the flow channel number ratio based on the cross-sectional area ratio, the flow channel width ratio, and the flow channel plate thickness ratio.

[0009] Optionally, the flow channel plate arrangement information includes a first material type of the first electrode flow channel plate and a second material type of the second electrode flow channel plate; the parameter information includes a first electrode potential of the electrolyte at the first electrode and a second electrode potential of the electrolyte at the second electrode; determining the flow channel plate arrangement information of multiple electrode flow channels in the battery flow channel based on the parameter information includes: determining the first material type based on the first electrode potential; and determining the second material type based on the second electrode potential.

[0010] Optionally, the electrode flow channel plate includes at least one coating layer with a thickness of 0.003 mm to 0.5 mm.

[0011] According to a second aspect of the present disclosure, an arrangement apparatus for a flow battery channel is provided, comprising: The acquisition module is used to acquire parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery. The determination module is used to determine the flow channel plate arrangement information of multiple electrode flow channel plates in the battery flow channel based on the parameter information and the electrochemical reaction rate; The generation module is used to generate flow channel arrangement information of the flow battery based on the flow channel plate arrangement information, and the flow channel arrangement information is used to arrange the battery flow channels of the flow battery.

[0012] Optionally, the parameter information includes the characteristic concentration of a characteristic substance in the electrolyte, the characteristic substance including reactant ions participating in the electrochemical reaction in the electrolyte; the flow channel plate arrangement information includes the flow channel number ratio of the number of first flow channels in the first electrode flow channel plate to the number of second flow channels in the second electrode flow channel plate; the determining module is further configured to determine the flow channel number ratio based on the characteristic concentration and the electrochemical reaction rate.

[0013] Optionally, the electrochemical reaction rate includes a first electrochemical reaction rate between the electrolyte and the first electrode and a second electrochemical reaction rate between the electrolyte and the second electrode; the characteristic concentration includes a first characteristic concentration of the electrolyte at the first electrode and a second characteristic concentration of the electrolyte at the second electrode; the determining module is further configured to determine the cross-sectional area ratio of the first cross-sectional area of ​​the first electrode flow channel plate to the second cross-sectional area of ​​the second electrode flow channel plate based on the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate, and the second electrochemical reaction rate, and to determine the flow channel number ratio based on the cross-sectional area ratio.

[0014] Optionally, the determining module is further configured to obtain the ratio of the first flow channel width of the first electrode flow channel plate to the second flow channel width of the second electrode flow channel plate, and to obtain the ratio of the first flow channel plate thickness of the first electrode flow channel plate to the second flow channel plate thickness of the second electrode flow channel plate, and to determine the flow channel number ratio based on the cross-sectional area ratio, the flow channel width ratio, and the flow channel plate thickness ratio.

[0015] Optionally, the flow channel plate arrangement information includes a first material type of the first electrode flow channel plate and a second material type of the second electrode flow channel plate; the parameter information includes a first electrode potential of the electrolyte at the first electrode and a second electrode potential of the electrolyte at the second electrode; the determining module is further configured to determine the first material type based on the first electrode potential and to determine the second material type based on the second electrode potential.

[0016] Optionally, the electrode flow channel plate includes at least one coating layer with a thickness of 0.003 mm to 0.5 mm.

[0017] According to a third aspect of the present disclosure, a flow battery is provided, including a battery flow channel arranged according to the flow battery flow channel arrangement method provided in the first aspect of the present disclosure.

[0018] According to a fourth aspect of the present disclosure, a battery stack is provided, including a plurality of flow batteries provided in the third aspect of the present disclosure.

[0019] The above technical solution allows for the acquisition of electrolyte parameters and electrochemical reaction rates between the electrolyte and the electrodes in a flow battery. Based on these parameters and reaction rates, the arrangement of multiple electrode flow channels within the battery's flow path can be determined, and the overall flow path arrangement information for the flow battery can be generated. This approach combines electrolyte properties and electrochemical reaction rates at the positive and negative electrodes to generate flow channel arrangement information. Subsequent channel arrangement based on this information improves electrolyte flow uniformity, reduces the increased internal resistance due to the flow channels, balances the electrochemical reactions at the electrodes, reduces concentration polarization, and enhances battery performance.

[0020] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating a method for arranging flow channels in a flow battery according to an exemplary embodiment.

[0022] Figure 2 According to Figure 1 The diagram shows a structural diagram of a flow battery flow channel, illustrating the arrangement of the flow channels.

[0023] Figure 3 This is a flowchart illustrating another method for arranging flow channels in a flow battery according to an exemplary embodiment.

[0024] Figure 4 This is a block diagram illustrating an arrangement of flow channels in a flow battery according to an exemplary embodiment.

[0025] Explanation of reference numerals in the attached figures 1-Bipolar plate; 2-Positive electrode flow channel plate; 3-Positive electrode; 4-Positive electrode frame; 5-Separator; 6-Negative electrode frame; 7-Negative electrode; 8-Negative electrode flow channel plate. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] The terms "first," "second," etc., used in the disclosed specification, claims, and the aforementioned drawings are used to distinguish similar objects and should not be construed as referring to a specific order or sequence. Furthermore, in the description of the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0028] In the description of this disclosure, unless otherwise stated, "multiple" means two or more, and other quantifiers are similar; "at least one," "one or more," or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one 'a' can represent any number of 'a's; as another example, one or more of a, b, and c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple; "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. The character " / " indicates that the preceding and following related objects are in an "or" relationship.

[0029] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this disclosure, it should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this disclosure, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.

[0030] In related technologies, to improve the performance of flow batteries, flow channels are typically added to the electrodes to alter the electrolyte flow path and increase the battery's power density. However, adding flow channels reduces the contact area between the electrodes and the plates, affecting the uniformity of electrolyte flow and potentially increasing the battery's internal resistance. Furthermore, the differences in electrolyte properties and electrochemical reaction rates at the two electrodes can hinder the full progress of the electrochemical reaction, potentially limiting battery performance.

[0031] Therefore, to overcome the problems existing in related technologies, this disclosure provides a method for arranging flow channels in a flow battery, a flow battery, and a battery stack. This method can obtain parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery. Based on this parameter information and the electrochemical reaction rate, the flow channel arrangement information of multiple electrode flow channel plates in the battery flow channel is determined, and based on this flow channel arrangement information, the flow channel arrangement information of the flow battery is generated. In this way, the flow channel arrangement information can be generated by combining the electrolyte physical properties and electrochemical reaction rates at the positive and negative electrodes of the battery. Subsequent arrangement of the flow channels based on this flow channel arrangement information can improve the uniformity of electrolyte flow, reduce the increased internal resistance of the battery due to the introduction of the flow channel plates, balance the electrochemical reactions of the electrolyte at the two electrodes, reduce concentration polarization, and improve battery performance.

[0032] The present disclosure will now be described in conjunction with specific embodiments.

[0033] Figure 1 This is a flowchart illustrating a method for arranging flow channels in a flow battery according to an exemplary embodiment, such as... Figure 1 As shown, the method for arranging the flow channels of this flow battery may include the following steps: S11. Obtain the parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery.

[0034] The flow battery may include bipolar plates, positive and negative electrodes, positive and negative electrode frames, a separator, and flow channel plates. The flow channel plates may include a positive electrode flow channel plate and a negative electrode flow channel plate. The battery flow channel may include a flow channel formed by stacking positive and negative electrode frames, a separator, and bipolar plates with flow channel plates.

[0035] For example, the total cross-sectional area of ​​the channels in the flow channel plate and the electrolyte flow can be calculated using numerical simulation methods based on finite element simulation software such as ANSYS and COMSOL, according to the preset thickness, preset number of channels, and preset cross-sectional shape of the electrode flow channel plate of the flow battery. The electrode flow channel plate may include a first electrode flow channel plate for the positive electrode and a second electrode flow channel plate for the negative electrode. The preset thickness can be obtained based on experimental and historical data, and can be within the range of 0.1mm-3mm. For example, to optimize the layout, the preset thickness can be determined to be 0.5mm-1.8mm. The preset number of channels may include the number of inlet channels for electrolyte inflow and the number of outlet channels for electrolyte outflow in the flow channel plate, and can be determined to be 1-50 based on finite element simulation experimental results. The preset cross-sectional shape may include at least one of rectangular, trapezoidal, V-shaped, U-shaped, dovetail-shaped, semi-circular, arc-shaped, fan-shaped, and circular shapes, and this disclosure does not limit this.

[0036] It should be noted that the specific steps of the simulation calculation can be referred to the relevant simulation methods of finite element simulation software such as ANSYS and COMSOL, and will not be elaborated in detail here.

[0037] S12. Based on the parameter information and the electrochemical reaction rate, determine the flow channel plate arrangement information of multiple electrode flow channel plates in the battery flow channel.

[0038] The flow channel plate can be a three-dimensional mesh structure with a porosity of 0-90%. The width of the flow channels can range from 1mm to 10mm, and the flow channels can be hollowed out and manufactured through processes such as milling, injection molding, and 3D printing. The arrangement information can include the arrangement information of the positive electrode flow channel plate and the negative electrode flow channel plate, including the material type of the flow channel plate, the number of first flow channels in the first electrode flow channel plate, and the ratio of the number of second flow channels in the second electrode flow channel plate.

[0039] S13. Based on the arrangement information of the electrode flow channel plate, generate the flow channel arrangement information of the flow battery.

[0040] The flow channel arrangement information is used to arrange the battery flow channels of the flow battery, such as... Figure 2 As shown, the flow channel of the flow battery includes a bipolar plate (1), a positive electrode flow channel plate (2), a positive electrode (3), a positive electrode plate frame (4), a separator (5), a negative electrode plate frame (6), a negative electrode (7), and a negative electrode flow channel plate (8). The flow channel arrangement information may include the flow channel arrangement information of the positive electrode flow channel plate (2) and the negative electrode flow channel plate (8).

[0041] Using the above method, it is possible to obtain the parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery. Based on this parameter information and the electrochemical reaction rate, the flow channel arrangement information of multiple electrode flow channel plates in the battery flow channel can be determined, and the flow channel arrangement information of the flow battery can be generated based on this flow channel arrangement information. In this way, the flow channel arrangement information can be generated by combining the electrolyte physical properties and electrochemical reaction rates at the positive and negative electrodes. Subsequently, the flow channels can be arranged based on the flow channel arrangement information, which can improve the uniformity of electrolyte flow, reduce the increase in battery internal resistance caused by the introduction of flow channel plates, balance the electrochemical reaction of the electrolyte at the two electrodes, reduce concentration polarization, and improve battery performance.

[0042] In some embodiments, the parameter information may include the characteristic concentration of a characteristic substance in the electrolyte, and the flow channel plate arrangement information may include the ratio of the number of first flow channels in the first electrode flow channel plate to the number of second flow channels in the second electrode flow channel plate. Step S12 may include: The ratio of the number of flow channels is determined based on the characteristic concentration and the electrochemical reaction rate.

[0043] In some embodiments, the electrochemical reaction rate includes a first electrochemical reaction rate between the electrolyte and the first electrode and a second electrochemical reaction rate between the electrolyte and the second electrode, and the characteristic concentration includes a first characteristic concentration of the electrolyte at the first electrode and a second characteristic concentration of the electrolyte at the second electrode. The cross-sectional area ratio of the first cross-sectional area of ​​the first electrode flow channel plate to the second cross-sectional area of ​​the second electrode flow channel plate can be determined based on the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate, and the second electrochemical reaction rate, and the flow channel number ratio can be determined based on the cross-sectional area ratio.

[0044] The characteristic substance includes the active substance in the electrolyte that participates in the electrochemical reaction. The first electrode can be a positive electrode, the second electrode can be a negative electrode, and the cross-sectional shape of the first electrode flow channel plate and the second electrode flow channel plate can include at least one of the following shapes: serpentine, U-shaped, interdigitated, parallel, staggered, grid, tree-shaped, spiral, etc.

[0045] For example, this cross-sectional area ratio can be calculated using the following formula:

[0046] in, This is the ratio of the cross-sectional areas. For the rate of this first electrochemical reaction, For the rate of this second electrochemical reaction, This is the first characteristic concentration. This is the concentration of the second characteristic.

[0047] In some embodiments, the flow width ratio of the first flow channel width of the first electrode flow channel plate to the second flow channel width of the second electrode flow channel plate can be obtained, and the flow channel thickness ratio of the first flow channel plate thickness of the first electrode flow channel plate to the second flow channel plate thickness of the second electrode flow channel plate can be obtained. The flow channel number ratio can be determined based on the cross-sectional area ratio, the flow channel width ratio, and the flow channel plate thickness ratio.

[0048] The widths of the first and second flow channels can range from 1mm to 10mm, and the ratio of the flow channel widths can be calculated using the following formula:

[0049] in, This is the ratio of the flow channel width. The width of the first flow channel, This is the width of the second flow channel.

[0050] Furthermore, the thicknesses of the first and second flow channel plates can range from 0.5mm to 1.8mm, and the ratio of their thicknesses can be calculated using the following formula:

[0051] in, This is the ratio of the thickness of the flow channel plate. The thickness of the first flow channel plate, The thickness of the second flow channel plate.

[0052] For example, the ratio of the number of flow channels can be calculated using the following formula:

[0053] in, This is the ratio of the number of flow channels. This is the ratio of the cross-sectional areas. This is the ratio of the flow channel width. This represents the ratio of the thickness of the flow channel plate. By subsequently arranging the battery flow channels based on the calculated ratio of the number of flow channels at the two electrodes, the uniformity of electrolyte flow can be improved, the increased internal resistance of the battery due to the introduction of the flow channel plate can be reduced, concentration polarization can be decreased, and battery performance can be enhanced.

[0054] In some embodiments, the flow channel plate arrangement information may include a first material type of the first electrode flow channel plate and a second material type of the second electrode flow channel plate. The parameter information may include a first electrode potential of the electrolyte at the first electrode and a second electrode potential of the electrolyte at the second electrode. Step S12 may include: The first material type is determined based on the first electrode potential; the second material type is determined based on the second electrode potential.

[0055] For example, when the first electrode potential is 1.2V, the first material type can be determined as a first metal layer, wherein the first metal layer can be a single element or alloy of any metal element such as titanium, tantalum, vanadium, iridium, molybdenum, chromium, or aluminum; or, when the first electrode potential is 1.0V, the first material type can be determined as a first non-metallic layer, wherein the first non-metallic layer can be at least one of carbon materials such as hard graphite plate, carbon-plastic composite plate, or flexible graphite plate. When the second electrode potential is 0V, the second material type can be determined as a second metal layer, wherein the second metal layer can be a single element or alloy of any metal element such as lead, tin, antimony, tungsten, bismuth, or silver; or, when the second electrode potential is -0.27V, the second material type can be determined as a second non-metallic layer, wherein the second non-metallic layer can be at least one of carbon materials such as hard graphite plate, carbon-plastic composite plate, or flexible graphite plate. In this way, the subsequent arrangement of battery channels based on the material types at the two electrodes can match the channel plate material with the electrode environment, which can increase the active sites of electrode reactions and improve the reaction rate of electrolyte at the electrodes.

[0056] In some embodiments, the electrode flow channel plate includes at least one coating layer with a thickness of 0.1 mm to 2 mm.

[0057] The coating can include a metallic coating or a graphite coating, and the coating material is compatible with the electrode environment and can resist corrosion from the electrode environment. This avoids material limitations caused by electrolyte parameters, reduces the internal resistance of the flow battery stack, and reduces ohmic polarization.

[0058] Figure 3 This is a flowchart illustrating another method for arranging the flow channels of a flow battery according to an exemplary embodiment, such as... Figure 3 As shown, the method includes: S301. Obtain the parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery.

[0059] The parameters include the first characteristic concentration of reactant ions participating in the electrochemical reaction in the electrolyte at the first electrode, the second characteristic concentration of reactant ions participating in the electrochemical reaction in the electrolyte at the second electrode, the first electrode potential of the electrolyte at the first electrode, and the second electrode potential of the electrolyte at the second electrode. The electrochemical reaction rate includes the first electrochemical reaction rate between the electrolyte and the first electrode and the second electrochemical reaction rate between the electrolyte and the second electrode. These parameters can be calculated using numerical simulation methods based on finite element simulation software such as ANSYS and COMSOL.

[0060] S302. Determine the ratio of the cross-sectional area of ​​the first electrode to the cross-sectional area of ​​the second electrode based on the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate, and the second electrochemical reaction rate.

[0061] For example, this cross-sectional area ratio can be calculated using the following formula:

[0062] in, This is the ratio of the cross-sectional areas. For the rate of this first electrochemical reaction, For the rate of this second electrochemical reaction, This is the first characteristic concentration. This is the concentration of the second characteristic.

[0063] S303. Obtain the ratio of the first flow channel width of the first electrode flow channel plate to the second flow channel width of the second electrode flow channel plate.

[0064] The widths of the first and second flow channels can range from 1mm to 10mm, and the ratio of their widths can be calculated using the following formula:

[0065] in, This is the ratio of the flow channel width. The width of the first flow channel, This is the width of the second flow channel.

[0066] S304. Obtain the ratio of the thickness of the first flow channel plate of the first electrode flow channel plate to the thickness of the second flow channel plate of the second electrode flow channel plate.

[0067] The thicknesses of the first and second flow channel plates can range from 0.5mm to 1.8mm, and the ratio of their thicknesses can be calculated using the following formula:

[0068] in, This is the ratio of the thickness of the flow channel plate. The thickness of the first flow channel plate, The thickness of the second flow channel plate.

[0069] S305. Determine the ratio of the number of flow channels based on the ratio of the cross-sectional area, the ratio of the flow channel width, and the ratio of the flow channel plate thickness.

[0070] The ratio of the number of flow channels can be calculated using the following formula:

[0071] in, This is the ratio of the number of flow channels. This is the ratio of the cross-sectional areas. This is the ratio of the flow channel width. This is the ratio of the thickness of the flow channel plate.

[0072] S306. Determine the type of the first material based on the potential of the first electrode.

[0073] For example, when the first electrode potential is 1.2V, the first material type can be determined as a first metal layer, wherein the first metal layer can be a single element or alloy of any metal element such as titanium, tantalum, vanadium, iridium, molybdenum, chromium, or aluminum; or, when the first electrode potential is 1.0V, the first material type can be determined as a first non-metallic layer, wherein the first non-metallic layer can be at least one of carbon materials such as hard graphite plate, carbon-plastic composite plate, or flexible graphite plate.

[0074] S307. Determine the type of the second material based on the potential of the second electrode.

[0075] For example, when the second electrode potential is 0V, the second material type can be determined as a second metal layer, wherein the second metal layer can be a single element or alloy of any metal element such as lead, tin, antimony, tungsten, bismuth, or silver; or, when the second electrode potential is -0.27V, the second material type can be determined as a second non-metallic layer, wherein the second non-metallic layer can be at least one of carbon materials such as hard graphite plate, carbon-plastic composite plate, or flexible graphite plate.

[0076] S308. Based on the first material type, the second material type, and the ratio of the number of flow channels, generate the flow channel arrangement information of the flow battery.

[0077] The flow channel layout information is used to arrange the battery flow channels of the flow battery.

[0078] Using the above method, it is possible to obtain the characteristic concentrations of reactant ions participating in the electrochemical reaction in the electrolyte at the electrode, the electrode potential of the electrolyte at the electrode, and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery. Based on these characteristic concentrations and electrochemical reaction rates, the ratio of the number of first channels in the first electrode flow channel plate to the number of second channels in the second electrode flow channel plate can be determined. Furthermore, based on the electrode potential, the material type of the electrode can be determined. Finally, based on this channel ratio and the electrode material type, the flow channel arrangement information of the flow battery can be generated. In this way, flow channel arrangement information can be generated by combining the electrolyte properties and electrochemical reaction rates at the positive and negative electrodes. Subsequent channel arrangement based on this information can improve the uniformity of electrolyte flow, reduce the increase in battery internal resistance caused by the introduction of the flow channel plates, balance the electrochemical reactions of the electrolyte at the two electrodes, reduce concentration polarization, and improve battery performance.

[0079] It should be noted that the above Figure 3 The descriptions of each step in the illustrated embodiments can be found in the descriptions of the relevant steps in the foregoing embodiments, and will not be repeated here.

[0080] Furthermore, for the sake of simplicity, the above method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions. For example, steps S303 and S304 are not limited to the order shown in the current embodiment; step S304 can be executed first, followed by step S303, or steps S303 and S304 can be executed simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0081] Figure 4 This is a block diagram illustrating an arrangement of flow channels in a flow battery according to an exemplary embodiment, with reference to... Figure 4 The device includes: The acquisition module 401 is used to acquire parameter information of the electrolyte in the flow battery and the electrochemical reaction rate between the electrolyte and the electrodes of the flow battery. The determination module 402 is used to determine the flow channel plate arrangement information of multiple electrode flow channel plates in the battery flow channel based on the parameter information and the electrochemical reaction rate. The generation module 403 is used to generate the flow channel arrangement information of the flow battery based on the flow channel plate arrangement information. The flow channel arrangement information is used to arrange the battery flow channels of the flow battery.

[0082] Optionally, the parameter information includes the characteristic concentration of a characteristic substance in the electrolyte, the characteristic substance including reactant ions participating in the electrochemical reaction in the electrolyte; the flow channel plate arrangement information includes the flow channel number ratio of the number of first flow channels in the first electrode flow channel plate to the number of second flow channels in the second electrode flow channel plate; the determining module 402 is further configured to determine the flow channel number ratio based on the characteristic concentration and the electrochemical reaction rate.

[0083] Optionally, the electrochemical reaction rate includes the first electrochemical reaction rate between the electrolyte and the first electrode and the second electrochemical reaction rate between the electrolyte and the second electrode; the characteristic concentration includes the first characteristic concentration of the electrolyte at the first electrode and the second characteristic concentration of the electrolyte at the second electrode; the determining module 402 is further configured to determine the cross-sectional area ratio of the first cross-sectional area of ​​the first electrode flow channel plate to the second cross-sectional area of ​​the second electrode flow channel plate based on the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate and the second electrochemical reaction rate, and to determine the flow channel number ratio based on the cross-sectional area ratio.

[0084] Optionally, the determining module 402 is further configured to obtain the ratio of the first flow channel width of the first electrode flow channel plate to the second flow channel width of the second electrode flow channel plate, and to obtain the ratio of the first flow channel plate thickness of the first electrode flow channel plate to the second flow channel plate thickness of the second electrode flow channel plate, and to determine the flow channel number ratio based on the cross-sectional area ratio, the flow channel width ratio, and the flow channel plate thickness ratio.

[0085] Optionally, the flow channel plate arrangement information includes a first material type of the first electrode flow channel plate and a second material type of the second electrode flow channel plate; the parameter information includes a first electrode potential of the electrolyte at the first electrode and a second electrode potential of the electrolyte at the second electrode; the determining module 402 is further configured to determine the first material type based on the first electrode potential and to determine the second material type based on the second electrode potential.

[0086] Optionally, the electrode flow channel plate includes at least one coating layer with a thickness of 0.003 mm to 0.5 mm.

[0087] Using the above-described apparatus, it is possible to obtain the characteristic concentrations of reactant ions participating in the electrochemical reaction in the electrolyte at the electrodes, the electrode potentials of the electrolyte at the electrodes, and the electrochemical reaction rates between the electrolyte and the electrodes of the flow battery. Based on these characteristic concentrations and electrochemical reaction rates, the ratio of the number of first channels in the first electrode flow channel plate to the number of second channels in the second electrode flow channel plate is determined. Furthermore, based on the electrode potentials, the material type of the electrodes is determined. Finally, based on this ratio of the number of channels and the material type of the electrodes, the flow channel arrangement information of the flow battery is generated. In this way, flow channel arrangement information can be generated by combining the electrolyte properties and electrochemical reaction rates at the positive and negative electrodes. Subsequent channel arrangement based on this information can improve the uniformity of electrolyte flow, reduce the increase in battery internal resistance caused by the introduction of the flow channel plates, balance the electrochemical reactions of the electrolyte at the two electrodes, reduce concentration polarization, and improve battery performance.

[0088] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0089] In another exemplary embodiment, a flow battery is also provided, which includes battery channels arranged according to the flow battery channel arrangement method described above.

[0090] In another exemplary embodiment, a battery stack is also provided, which includes a plurality of the above-described flow batteries.

[0091] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0092] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0093] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method of arranging a flow channel of a flow battery, characterized by, The method comprises: obtaining parameter information of electrolyte in a flow battery and electrochemical reaction rates between the electrolyte and electrodes of the flow battery; determining flow channel plate arrangement information of multiple electrode flow channel plates in a cell flow channel of the flow battery according to the parameter information and the electrochemical reaction rates; generating flow channel arrangement information of the flow battery based on the flow channel plate arrangement information, the flow channel arrangement information being used to arrange the cell flow channel of the flow battery.

2. The method of claim 1, wherein, The parameter information comprises characteristic concentrations of characteristic substances in the electrolyte, the characteristic substances comprising reactant ions in the electrolyte participating in electrochemical reactions; the flow channel plate arrangement information comprises a flow channel quantity ratio of a first flow channel quantity of a first electrode flow channel plate to a second flow channel quantity of a second electrode flow channel plate; and the determining of the flow channel plate arrangement information of the multiple electrode flow channel plates in the cell flow channel according to the parameter information and the electrochemical reaction rates comprises: determining the flow channel quantity ratio according to the characteristic concentrations and the electrochemical reaction rates.

3. The method of claim 2, wherein, The electrochemical reaction rates comprise first electrochemical reaction rates between the electrolyte and first electrodes and second electrochemical reaction rates between the electrolyte and second electrodes; the characteristic concentrations comprise first characteristic concentrations of electrolyte at the first electrodes and second characteristic concentrations of electrolyte at the second electrodes; and the determining of the flow channel quantity ratio according to the characteristic concentrations and the electrochemical reaction rates comprises: determining a cross-sectional area ratio of a first cross-sectional area of the first electrode flow channel plate to a second cross-sectional area of the second electrode flow channel plate according to the first characteristic concentrations, the second characteristic concentrations, the first electrochemical reaction rates and the second electrochemical reaction rates; and determining the flow channel quantity ratio according to the cross-sectional area ratio.

4. The method of claim 3, wherein, The determining of the flow channel quantity ratio according to the cross-sectional area ratio comprises: obtaining a flow channel width ratio of a first flow channel width of the first electrode flow channel plate to a second flow channel width of the second electrode flow channel plate; obtaining a flow channel plate thickness ratio of a first flow channel plate thickness of the first electrode flow channel plate to a second flow channel plate thickness of the second electrode flow channel plate; and determining the flow channel quantity ratio according to the cross-sectional area ratio, the flow channel width ratio and the flow channel plate thickness ratio.

5. The method of claim 2, wherein, The flow channel plate arrangement information comprises a first material type of the first electrode flow channel plate and a second material type of the second electrode flow channel plate; and the parameter information comprises a first electrode potential of electrolyte at the first electrodes and a second electrode potential of electrolyte at the second electrodes. The determining of the flow channel plate arrangement information of the multiple electrode flow channel plates in the cell flow channel according to the parameter information comprises: determining the first material type according to the first electrode potential; and determining the second material type according to the second electrode potential.

6. The method according to any one of claims 1 to 5, characterized in that, The electrode flow channel plate comprises at least one coating layer, and the thickness of the coating layer is 0.003 mm-0.5 mm.

7. An arrangement for a flow channel of a flow battery, characterized by The device comprises: an obtaining module configured to obtain parameter information of electrolyte in a flow battery and electrochemical reaction rates between the electrolyte and electrodes of the flow battery; determining, according to the parameter information and the electrochemical reaction rate, flow channel plate arrangement information of a plurality of electrode flow channel plates in the battery flow channel; generating, based on the flow channel plate arrangement information, flow channel arrangement information of the flow battery, the flow channel arrangement information being used to arrange the battery flow channel of the flow battery.

8. The apparatus of claim 7, wherein, The parameter information includes a characteristic concentration of a characteristic substance in the electrolyte, and the characteristic substance includes a reactant ion participating in the electrochemical reaction in the electrolyte; and the flow channel plate arrangement information includes a flow channel number ratio of a first flow channel number of a first electrode flow channel plate to a second flow channel number of a second electrode flow channel plate. The determining module is further configured to determine the flow channel number ratio according to the characteristic concentration and the electrochemical reaction rate.

9. The apparatus of claim 8, wherein, The electrochemical reaction rate includes a first electrochemical reaction rate between the electrolyte and a first electrode and a second electrochemical reaction rate between the electrolyte and a second electrode; and the characteristic concentration includes a first characteristic concentration of the electrolyte at the first electrode and a second characteristic concentration of the electrolyte at the second electrode. The determining module is further configured to determine a cross-sectional area ratio of a first cross-sectional area of a first electrode flow channel plate to a second cross-sectional area of a second electrode flow channel plate according to the first characteristic concentration, the second characteristic concentration, the first electrochemical reaction rate, and the second electrochemical reaction rate, and determine the flow channel number ratio according to the cross-sectional area ratio.

10. The apparatus of claim 9, wherein The determining module is further configured to obtain a flow channel width ratio of a first flow channel width of a first electrode flow channel plate to a second flow channel width of a second electrode flow channel plate, and obtain a flow channel plate thickness ratio of a first flow channel plate thickness of the first electrode flow channel plate to a second flow channel plate thickness of the second electrode flow channel plate, and determine the flow channel number ratio according to the cross-sectional area ratio, the flow channel width ratio, and the flow channel plate thickness ratio.

11. The apparatus of claim 8, wherein, The flow channel plate arrangement information includes a first material type of a first electrode flow channel plate and a second material type of a second electrode flow channel plate; and the parameter information includes a first electrode potential of the electrolyte at the first electrode and a second electrode potential of the electrolyte at the second electrode. The determining module is further configured to determine the first material type according to the first electrode potential, and determine the second material type according to the second electrode potential.

12. A flow battery, characterized in that, The battery includes a battery flow channel arranged according to the flow battery flow channel arrangement method of any one of claims 1-6.

13. A cell stack, characterised in that The battery includes a battery flow channel arranged according to the flow battery flow channel arrangement method of any one of claims 1-6.

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