A hierarchical seawater-activated battery bipolar plate flow channel structure and design method

Abstract

The present invention discloses a hierarchical seawater-activated battery bipolar plate flow channel structure and a design method, including a bipolar plate flow channel main body; two first-level inlet channels, two second-level inlet channels and four third-level inlet channels are provided on the bipolar plate flow channel main body. One end of the two first-level inlet channels is communicated with a seawater inlet, and the other end of each first-level inlet channel is communicated with one end of a second-level inlet channel. The other end of each second-level inlet channel is communicated with one end of two third-level inlet channels; a reaction area is provided on the bipolar plate flow channel main body, and the reaction area is arranged downstream of the third-level inlet channels and upstream of the third-level outlet channels, so that the seawater passing through the four third-level inlet channels enters the reaction area for reaction and then enters the third-level outlet channels. It can be seen that the hierarchical seawater-activated battery bipolar plate flow channel structure provided by the present invention can reduce the area of the flow dead zone in the reaction area and improve the effective utilization rate of seawater.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a hierarchical seawater-activated battery bipolar plate flow channel structure and a design method thereof. Background Art

[0002] With the development of current society, the consumption of primary energy is huge, and there is an urgent need to develop new energy sources to replace the original primary energy. As an emerging advanced energy supply technology, seawater-activated batteries can not only make significant contributions to the existing energy shortage problem, but also provide power sources with high energy density, high specific characteristics and no need for external seawater for electrical equipment. In addition, the application of seawater-activated batteries in the underwater field is a current research boom among scholars. As the core component of seawater-activated batteries, the bipolar plate flow channel structure should not only play a certain supporting role, but also provide high-speed and uniformly distributed seawater for the reaction area. However, due to the poor flow channel structure design method, bubbles and some flow dead zone areas may appear during the flow of seawater between the bipolar plates of the battery, seriously affecting the effective utilization rate of seawater. Exploring the relatively optimal flow channel structure, thereby reducing the area of the flow dead zone in the reaction area and improving the effective utilization rate of seawater, is one of the effective ways to improve the discharge capacity of seawater-activated batteries. Summary of the Invention

[0003] A hierarchical seawater-activated battery bipolar plate flow channel structure and a design method provided by the present invention provide a bipolar plate flow channel structure that can reduce the area of the flow dead zone in the reaction area and improve the effective utilization rate of seawater.

[0004] In the first aspect of the present invention, a hierarchical seawater-activated battery bipolar plate flow channel structure is provided, including a bipolar plate flow channel main body;

[0005] Two first-level inlet channels, two second-level inlet channels and four third-level inlet channels are provided on the bipolar plate flow channel main body. One end of each of the two first-level inlet channels is communicated with a seawater inlet, and the other end of each first-level inlet channel is communicated with one end of a second-level inlet channel. The other end of each second-level inlet channel is communicated with one end of two third-level inlet channels; two first-level outlet channels, two second-level outlet channels and four third-level outlet channels are provided on the bipolar plate flow channel main body. One end of each of the two first-level outlet channels is communicated with a seawater outlet, and the other end of each first-level outlet channel is communicated with one end of a second-level outlet channel. The other end of each second-level outlet channel is communicated with one end of at least two third-level outlet channels;

[0006] A reaction area is provided on the bipolar plate flow channel main body, and the reaction area is arranged downstream of the third-level inlet channels and upstream of the third-level outlet channels, so that the seawater passing through the four third-level inlet channels enters the reaction area for reaction and then enters the third-level outlet channels; wherein,

[0007] The seawater inlet and the seawater outlet are disposed at both ends of the bipolar plate flow channel body opposite to each other, and the connecting lines between the seawater inlet, the seawater outlet and the center point of the bipolar plate flow channel body are straight lines. The two first-stage inlet channels, the two second-stage inlet channels, the four third-stage inlet channels, the two first-stage outlet channels, the two second-stage outlet channels and the four third-stage outlet channels are all mirror-symmetrically arranged on both sides of the connecting line between the seawater inlet, the seawater outlet and the center point of the bipolar plate flow channel body.

[0008] In some implementable ways, the two third-stage inlet channels are symmetrically arranged on the extension line of the main trunk line of one second-stage inlet channel; the two third-stage outlet channels are symmetrically arranged on the extension line of the main trunk line of one second-stage outlet channel; the main trunk lines of the second-stage inlet channel and the second-stage outlet channel are both parallel to the connecting line between the seawater inlet and the seawater outlet.

[0009] In some implementable ways, the bipolar plate flow channel body further includes a plurality of inlet branch channels, one end of each inlet branch channel is communicated with the third-stage inlet channel, and the other end is communicated with the reaction zone.

[0010] In some implementable ways, the distances between the plurality of inlet branch channels at the connection of the reaction zone are the same, and the distance range is 3.5 mm - 4.5 mm. The width range of the inlet branch channels is 1.5 mm - 2.5 mm. The width range of the first-stage inlet channels is 3.5 mm - 4.5 mm. The width range of the second-stage inlet channels is 2.5 mm - 3.5 mm. The width range of the third-stage inlet channels is 1 mm - 2 mm.

[0011] In some implementable ways, the bipolar plate flow channel body further includes a plurality of outlet branch channels, one end of each outlet branch channel is communicated with the third-stage outlet channel, and the other end is communicated with the reaction zone.

[0012] In some implementable ways, the distances between the plurality of outlet branch channels at the connection of the reaction zone are the same, and the distance range is 3.5 mm - 4.5 mm. The width range of the outlet branch channels is 1.5 mm - 2.5 mm. The width range of the first-stage outlet channels is 3.5 mm - 4.5 mm. The width range of the second-stage outlet channels is 2.5 mm - 3.5 mm. The width range of the third-stage outlet channels is 1 mm - 2 mm.

[0013] In some implementable ways, the main trunk line of the first-stage inlet channel is an arc curve, and the main trunk line of the first-stage outlet channel is an arc curve.

[0014] The second aspect of the present invention provides a design method for the flow channel structure of the bipolar plate of a hierarchical seawater-activated battery, which is applied to the flow channel structure of the bipolar plate of a hierarchical seawater-activated battery described above. The method includes:

[0015] S1. According to the information of the bipolar plate flow channel structure parameters, construct the physical model information of the bipolar plate flow channel structure of the hierarchical seawater-activated battery;

[0016] S2. Process the physical model information to obtain the area ratio of the eddy current region corresponding to the bipolar plate flow channel structure parameters;

[0017] S3. According to the bipolar plate flow channel structure parameters information and the area ratio of the eddy current region corresponding to the bipolar plate flow channel structure parameters, iteratively optimize the physical model information to obtain the target bipolar plate flow channel structure parameters information;

[0018] S4. Process the target bipolar plate flow channel structure parameters information to obtain the main line curve model of the three-stage inlet flow channel.

[0019] In some implementable ways, the processing of the physical model information to obtain the area ratio of the eddy current region corresponding to the bipolar plate flow channel structure parameters includes:

[0020] S21. Perform preprocessing on the physical model information to obtain the fluid domain information;

[0021] S22. Perform mesh division on the fluid domain information to obtain the mesh information;

[0022] S23. Analyze and process the mesh information to obtain the area of the eddy current region and the area of the reaction region of the bipolar plate flow channel structure;

[0023] S24. Use the bipolar plate flow channel calculation model to perform calculation processing on the area of the eddy current region and the area of the reaction region to obtain the area ratio of the eddy current region corresponding to the bipolar plate flow channel structure parameters;

[0024] Among them, the bipolar plate flow channel calculation model is:

[0025]

[0026] In the formula, A DR is the area ratio of the eddy current region corresponding to the bipolar plate flow channel structure parameters, A D and A t are the area of the eddy current region and the area of the reaction region, and δ1 is the first weight parameter.

[0027] In some implementable ways, the main line curve model of the three-stage inlet flow channel is:

[0028]

[0029] In the formula, (x, y) is the coordinate information of the main line curve of the three - stage inlet channel, and y 0 and y 1 are the first fitting coefficient and the second fitting coefficient, x 0 is the deviation coefficient, A 0 、A 2 and A 2 are the first weight coefficient, the second weight coefficient and the third weight coefficient, t 0 、t 1 and t 2 are the third fitting coefficient, the fourth fitting coefficient and the fifth fitting coefficient, and l is the first length.

[0030] Advantages of the present invention:

[0031] 1. The hierarchical seawater - activated battery bipolar plate flow channel structure of the present invention can make the seawater flowing into the bipolar plate more evenly distributed and easier to discharge from the bipolar plate after flowing through the reaction area;

[0032] 2. The hierarchical seawater - activated battery bipolar plate flow channel structure of the present invention can effectively consume the turbulent kinetic energy of the seawater flowing vertically into the bipolar plate through the hierarchical flow channel layout. After the seawater flows into the three - stage inlet channel from the two - stage inlet channel, it is diverted to the reaction area, reducing the formation of eddy currents at the inlet and outlet of the reaction area;

[0033] 3. The bipolar plate flow channel structure proposed by the present invention is easy to process and has low cost. The flow channel contour can be easily drawn according to the main line, and mass production can be completed after the mold is manufactured;

[0034] 4. The bipolar plate flow channel structure proposed by the present invention has longer branch channels and greater resistance than the traditional four - channel straight - through structure. Description of the Drawings

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 is the structural schematic diagram of a hierarchical seawater - activated battery bipolar plate flow channel structure of the present invention;

[0037] Figure 2 is the structural schematic diagram of the inlet channel of a hierarchical seawater - activated battery bipolar plate flow channel structure of the present invention;

[0038] Figure 3 This is a physical diagram of the candlestick in the present invention;

[0039] Figure 4 This is a schematic flow chart of a design method for a bipolar plate flow channel structure of a hierarchical seawater-activated battery in the present invention;

[0040] Figure 5 This is a schematic diagram of the bipolar plate flow channel structure parameters in a design method for a bipolar plate flow channel structure of a hierarchical seawater-activated battery in the present invention;

[0041] Figure 6 This is a schematic diagram of the main line of the three-stage inlet flow channel in a design method for a bipolar plate flow channel structure of a hierarchical seawater-activated battery in the present invention;

[0042] Figure 7 This is a comparison chart of the pressure drop, pump power consumption, and proportion of flow dead zones between the bipolar plate flow channel structure of a hierarchical seawater-activated battery and the traditional bipolar plate flow channel structure in the present invention;

[0043] Figure 8 This is a schematic diagram of the velocity distribution at the inlet of the bipolar plate flow channel structure of a hierarchical seawater-activated battery and the traditional bipolar plate flow channel structure in the present invention.

[0044] Explanation of reference numerals:

[0045] 1. Bipolar plate flow channel body;

[0046] 2. Seawater inlet;

[0047] 3. Seawater outlet;

[0048] 4. First-stage inlet flow channel;

[0049] 5. Second-stage inlet flow channel;

[0050] 6. Third-stage inlet flow channel;

[0051] 7. Inlet branch flow channel;

[0052] 8. Reaction zone;

[0053] 9. First-stage outlet flow channel;

[0054] 10. Second-stage outlet flow channel;

[0055] 11. Third-stage outlet flow channel;

[0056] 12. Outlet branch flow channel;

[0057] 13. Turbulence pillar. Detailed implementation manners

[0058] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0060] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0061] It should be noted that the seawater in this application is the electrolyte of the seawater-activated battery.

[0062] The present invention provides a hierarchical seawater-activated battery bipolar plate flow channel structure and design method, which can reduce the area of the flow dead zone in the reaction zone and improve the effective utilization rate of seawater.

[0063] Embodiment 1

[0064] As Figures 1 to 3 , the present invention provides a hierarchical seawater-activated battery bipolar plate flow channel structure, which is characterized in that it includes a bipolar plate flow channel main body 1.

[0065] There are two primary inlet channels 4, two secondary inlet channels 5 and four tertiary inlet channels 6 provided on the bipolar plate flow channel body 1. One end of each of the two primary inlet channels 4 is connected to the seawater inlet 2, the other end of each primary inlet channel 4 is connected to one end of a secondary inlet channel 5, and the other end of each secondary inlet channel 5 is connected to one end of two tertiary inlet channels 6. There are two primary outlet channels 9, two secondary outlet channels 10 and four tertiary outlet channels 11 provided on the bipolar plate flow channel body 1. One end of each of the two primary outlet channels 9 is connected to the seawater outlet 3, the other end of each primary outlet channel 9 is connected to one end of a secondary outlet channel 10, and the other end of each secondary outlet channel 10 is connected to one end of at least two tertiary outlet channels 11.

[0066] A reaction zone 8 is provided on the bipolar plate flow channel body 1. The reaction zone 8 is arranged downstream of the tertiary inlet channels 6 and upstream of the tertiary outlet channels 11, so that the seawater passing through the four tertiary inlet channels 6 enters the reaction zone 8 for reaction and then enters the tertiary outlet channels 11. Among them,

[0067] The seawater inlet 2 and the seawater outlet 3 are oppositely arranged at both ends of the bipolar plate flow channel body 1, and the connection lines between the seawater inlet 2, the seawater outlet 3 and the center point of the bipolar plate flow channel body 1 are a straight line. The two primary inlet channels 4, the two secondary inlet channels 5, the four tertiary inlet channels 6, the two primary outlet channels 9, the two secondary outlet channels 10 and the four tertiary outlet channels 11 are all mirror-symmetrically arranged on both sides of the connection line between the seawater inlet 2, the seawater outlet 3 and the center point of the bipolar plate flow channel body 1.

[0068] Specifically, when the battery is operating normally, seawater passes through the primary inlet channels 4, secondary inlet channels 5 and tertiary inlet channels 6 in sequence from the seawater inlet 2, then flows into the reaction zone 8 for reaction. After the reaction ends, it passes through the tertiary outlet channels 11, secondary outlet channels 10 and primary outlet channels 9 in sequence, and then flows out through the seawater outlet 3. Through the hierarchical flow channel design of the primary inlet channels 4, secondary inlet channels 5, tertiary inlet channels 6, primary outlet channels 9, secondary outlet channels 10 and tertiary outlet channels 11, the turbulent kinetic energy can be well inhibited, and the performance of the seawater-activated battery can be improved.

[0069] The two tertiary inlet channels 6 are symmetrically arranged on the extension line of the main line of a secondary inlet channel 5. The two tertiary outlet channels 11 are symmetrically arranged on the extension line of the main line of a secondary outlet channel 10. The main lines of the secondary inlet channel 5 and the secondary outlet channel 10 are both parallel to the connection line between the seawater inlet 2 and the seawater outlet 3.

[0070] It should be noted that the main lines of the secondary inlet channel 5 and the secondary outlet channel 10 being both parallel to the connection line between the seawater inlet 2 and the seawater outlet 3 can effectively inhibit the turbulent kinetic energy of the seawater and improve the energy efficiency performance.

[0071] The bipolar plate flow channel body 1 further includes a plurality of inlet branch channels 7. One end of the inlet branch channel 7 is communicated with the three-stage inlet channel 6, and the other end is communicated with the reaction zone 8.

[0072] Preferably, there are 5 inlet branch channels 7.

[0073] It should be noted that referring to Figure 2 and Figure 3 , the overall structure of the above-mentioned first-stage inlet channel 4, second-stage inlet channel 5, third-stage inlet channel 6 and a plurality of inlet branch channels 7 is designed by imitating the existing candlestick. It has strong water conductivity, and can make the seawater flowing into the bipolar plate more evenly distributed, and is easier to discharge from the bipolar plate after flowing through the reaction zone 8;

[0074] The distances between the plurality of inlet branch channels 7 at the connection of the reaction zone 8 are the same, and the distance range is 3.5 mm - 4.5 mm. The width range of the inlet branch channel 7 is 1.5 mm - 2.5 mm. The width range of the first-stage inlet channel 4 is 3.5 mm - 4.5 mm. The width range of the second-stage inlet channel 5 is 2.5 mm - 3.5 mm. The width range of the third-stage inlet channel 6 is 1 mm - 2 mm.

[0075] Preferably, the distance between the plurality of inlet branch channels 7 at the connection of the reaction zone 8 is 4 mm, the width of the first-stage inlet channel 4 is 4 mm, the width of the second-stage inlet channel 5 is 3 mm, and the width of the third-stage inlet channel 6 is 1.5 mm.

[0076] The bipolar plate flow channel body 1 further includes a plurality of outlet branch channels 12. One end of the outlet branch channel 12 is communicated with the three-stage outlet channel 11, and the other end is communicated with the reaction zone 8.

[0077] Preferably, there are 5 outlet branch channels 12.

[0078] It should be noted that the overall structure of the above-mentioned first-stage outlet channel 9, second-stage outlet channel 10, third-stage outlet channel 11 and a plurality of outlet branch channels 12 is designed by imitating the existing candlestick. It has strong water conductivity, and can make the seawater flowing into the bipolar plate more evenly distributed, and is easier to discharge from the bipolar plate after flowing through the reaction zone 8.

[0079] The distances between the plurality of outlet branch channels 12 at the connection of the reaction zone 8 are the same, and the distance range is 3.5 mm - 4.5 mm. The width range of the outlet branch channel 12 is 1.5 mm - 2.5 mm. The width range of the first-stage outlet channel 9 is 3.5 mm - 4.5 mm. The width range of the second-stage outlet channel 10 is 2.5 mm - 3.5 mm. The width range of the third-stage outlet channel 11 is 1 mm - 2 mm.

[0080] Preferably, the distance between several outlet branch channels 12 at the connection of the reaction zone 8 is 4 mm, the width of the first-stage outflow channel 9 is 4 mm, the width of the second-stage outflow channel 10 is 3 mm, and the width of the third-stage outflow channel 11 is 1.5 mm.

[0081] Several spoiler columns 13 are also arranged in the reaction zone 8, and the outer contour of the bipolar plate flow channel body 1 is in the shape of a flat cylinder structure.

[0082] Preferably, the number of the spoiler columns 13 is greater than 8. Exemplarily, the number of the spoiler columns 13 is 100.

[0083] It should be noted that the spoiler columns 13 can slow down the flow of seawater in the reaction zone 8, increase the reaction time of seawater in the reaction zone 8, and thus improve the efficiency of the seawater-activated battery.

[0084] The main line of the first-stage inlet channel 4 is an arc curve, and the main line of the first-stage outflow channel 9 is an arc curve.

[0085] It should be noted that the main line of the first-stage inlet channel 4 is an arc curve drawn with a point on the line connecting the seawater inlet 2 and the seawater outlet 3 as the center and the distance from the center to the end of the seawater inlet 2 far from the seawater outlet 3 as the radius, and the main line of the first-stage outflow channel 9 is an arc curve drawn with a point on the line connecting the seawater outlet 3 and the seawater inlet 2 as the center and the distance from the center to the end of the seawater outlet far from the seawater inlet 2 as the radius.

[0086] It should be noted that the main lines of the first-stage inlet channel 4 and the first-stage outflow channel 9 being arc curves are beneficial to slowing down the collision of seawater when the seawater flows into the first-stage inlet channel 4 and flows out of the first-stage outflow channel 9, enabling the seawater to flow evenly into the reaction zone 8, which is beneficial to improving the global reaction ability of the seawater-activated battery and reducing the problem that the reaction ability in some parts of the reaction zone 8 is strong while in some parts is weak.

[0087] Embodiment 2

[0088] As Figures 4 to 6 , the present invention provides a design method for a hierarchical seawater-activated battery bipolar plate flow channel structure, which is applied to the hierarchical seawater-activated battery bipolar plate flow channel structure in Embodiment 1. The method includes:

[0089] S1, according to the bipolar plate flow channel structure parameter information, construct the physical model information of the hierarchical seawater-activated battery bipolar plate flow channel structure.

[0090] It should be noted that the above construction is to establish the physical model information of the hierarchical seawater-activated battery bipolar plate flow channel structure using Solidworks modeling software, and the embodiments of the present invention do not make specific limitations.

[0091] It should be noted that referring to Figure 5 , the parameters in the bipolar plate flow channel structure parameter information include: the flow channel width d1 of the first-stage inlet flow channel MC1, the flow channel width d2 of the second-stage inlet flow channel MC2, the flow channel width d3 of the third-stage inlet flow channel MC3, and the flow channel width d4 of each inlet branch flow channel BC1-5; the chamfer R2 from the main line of the first-stage inlet flow channel MC1 to the main line of the second-stage inlet flow channel MC2, the chamfer R1 from the main line of the second-stage inlet flow channel MC2 to the main line of the third-stage inlet flow channel MC3, and the chamfers on the left and right sides of each inlet branch flow channel BC1-5 in the third-stage inlet flow channel near the third-stage inlet flow channel MC3; the length of the third-stage inlet flow channel near the reaction zone is s = L1 + 4L2 + 2L3 (refer to Figure 5 , Figure 5 , the red lines in Figure 6 represent the first-stage inlet flow channel, the second-stage inlet flow channel, the third-stage inlet flow channel, and several inlet branch flow channels), and the height is D = H1 + H2 + H3 + H4; the distances L1, L2, L3 between each flow channel (BC1-5, MC3) near the reaction zone; the main line of the first-stage inlet flow channel MC1 is an arc curve drawn with a point on the line connecting the seawater outlet and the seawater inlet as the center and a radius with the end point at H1 from the lowest end of the fluid domain. The starting point of the arc curve is the lowest end of the fluid domain, and the ending point is at the position s / 2 from the lowest end of the fluid domain, with a height of H2; the deflection angle σ of the main line of the second-stage inlet flow channel MC2, with a height of H3; refer to Figure 6 , the deflection angles of the main line of the third-stage inlet flow channel MC3 are θ1 and θ2 respectively, with a height of H4; the deflection angles of the main lines of each inlet branch flow channel BC1-5 in the third stage are α and β respectively.

[0092] It should be noted that l and D are preset lengths, and the embodiments of the present invention do not make specific limitations.

[0093] The initial settings of the parameter values in the bipolar plate flow channel structure parameter information in S1 are respectively d1 = 0.25D, d2 = 0.16D, d3 = 0.042D; L1 = 0.08D, L2 = 0.29D; the initial values of α, β, θ, and σ are 0°; R2 = 0.16D, R1 = 0.16D.

[0094] S2, process the physical model information to obtain the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information.

[0095] S3, perform iterative optimization on the physical model information according to the bipolar plate flow channel structure parameter information and the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information to obtain the target bipolar plate flow channel structure parameter information.

[0096] S4, process the target bipolar plate flow channel structure parameter information to obtain the main line curve model of the third-stage inlet flow channel.

[0097] It should be noted that the main line curve model of the three - stage inlet channel is obtained by processing the target bipolar plate flow channel structure parameter information through a specified calculation model by the user, and the embodiments of the present invention do not make specific limitations.

[0098] It should be noted that in addition to obtaining the main line curve model of the three - stage inlet channel through the target bipolar plate flow channel structure parameter information, curve models of the first - stage inlet channel, the second - stage inlet channel, and each inlet branch channel can also be obtained, and the embodiments of the present invention do not make limitations.

[0099] It should be noted that the curve models of the first - stage outlet channel, the second - stage outlet channel, the third - stage outlet channel, and each outlet branch channel are exactly the same as the main line curves of the first - stage inlet channel, the second - stage inlet channel, the third - stage inlet channel, and each inlet branch channel, except for differences in position and direction.

[0100] It should be noted that the above iterative optimization of the physical model information is to continuously update the parameter values in the bipolar plate flow channel structure parameter information and execute S2 to obtain the bipolar plate flow channel structure parameter information corresponding to the minimum eddy current area ratio as the target bipolar plate flow channel structure parameter information.

[0101] It should be noted that in the above - mentioned update process, d1, d2, and d3 are adjusted in increments of 0.2 mm, L1 and L2 are adjusted in increments of 0.2 mm, α, β, θ, and σ are adjusted in increments of 5° each time, and R1 and R2 are adjusted in increments of 0.2 mm. Among them, the adjustment ranges of each parameter are d1 = 0.25 - 0.42D, d2 = 0.16 - 0.33D, d3 = 0.042 - 0.33D, L1 = 0.08 - 0.2D, L2 = 0.29 - 0.375D, the adjustment ranges of α, β, θ, and σ are all within 0 - 180°, R2 = 0.16 - 0.33D, and R1 = 0.042 - 0.16D.

[0102] It should be noted that the above - mentioned adjustment is to fully combine the ranges of the above - mentioned various parameters according to the initial set values and adjustment amplitudes in S1, and solve the eddy current area ratio for all combinations.

[0103] It should be noted that the target bipolar plate flow channel structure parameter information obtained after the above iterative optimization is shown in Table 1.

[0104] Table 1 Target bipolar plate flow channel structure parameter information

[0105]

[0106]

[0107] It can be seen that implementing the design method of the bipolar plate flow channel structure of the hierarchical seawater-activated battery in this embodiment is beneficial to quickly constructing the bipolar plate flow channel structures of different types and sizes of seawater-activated batteries, with strong adaptability and broad application prospects.

[0108] In an alternative embodiment, processing the physical model information to obtain the eddy current area ratio corresponding to the bipolar plate flow channel structure parameters includes:

[0109] S21, preprocessing the physical model information to obtain the fluid domain information.

[0110] It should be noted that the above preprocessing is obtained by processing through Spaceclaim, and the embodiments of the present invention do not make specific limitations.

[0111] S22, meshing the fluid domain information to obtain the mesh information.

[0112] It should be noted that the above meshing is obtained by meshing through Fluent Meshing, and the embodiments of the present invention do not make specific limitations.

[0113] S23, analyzing and processing the mesh information to obtain the eddy current area and the reaction area of the bipolar plate flow channel structure.

[0114] It should be noted that the above analysis and processing are calculated through Fluent software and the calculation results are post-processed in CFD-Post, and the embodiments of the present invention do not make specific limitations.

[0115] S24, using the bipolar plate flow channel calculation model to calculate and process the eddy current area and the reaction area to obtain the eddy current area ratio corresponding to the bipolar plate flow channel structure parameters.

[0116] Among them, the bipolar plate flow channel calculation model is:

[0117]

[0118] In the formula, A DR is the eddy current area ratio corresponding to the bipolar plate flow channel structure parameters, A D and A t are the eddy current area and the reaction area, and δ1 is the first weight parameter.

[0119] It should be noted that the first weight parameter can be set by the user or obtained according to historical data, and the embodiments of the present invention do not make specific limitations.

[0120] In an alternative embodiment, the main line curve model of the three-stage inlet channel is:

[0121]

[0122] In the formula, (x, y) is the coordinate information of the main line curve of the three-stage inlet channel, and y 0 and y 1 are the first fitting coefficient and the second fitting coefficient, x 0 is the deviation coefficient, A 0 、A 2 and A 2 are the first weight coefficient, the second weight coefficient and the third weight coefficient, t 0 、t 1 and t 2 are the third fitting coefficient, the fourth fitting coefficient and the fifth fitting coefficient, and l is the first length.

[0123] Preferably, y 0 = 215233.288, A 0 = -1.91, t 0 = 1.66, A 1 = -215231.425, t 1 = 563076.358, y 1 = -0.866, x 0 = 9.691, A 2 = 6.693, t 2 = 21.388.

[0124] It should be noted that the first length l is L1 + 4L2 + L3.

[0125] It should be noted that referring to Figure 6 , in this application, the two-dimensional plane coordinates take the connection point of the three-stage inlet channel and the two-stage inlet channel as the origin, the extension direction of the three-stage inlet channel towards the reaction area and the axis parallel to the connection of the seawater inlet and the seawater outlet as the Y-axis, the direction perpendicular to the Y-axis and the three-stage inlet channel away from the seawater inlet as the X-axis, and the main line curve of the three-stage inlet channel is distributed in the first quadrant of the two-dimensional plane coordinates.

[0126] Example 3

[0127] As Figures 7 to 8 , the present invention provides a method for characterizing the performance of a flow channel structure of a bipolar plate of a hierarchical seawater-activated battery, which is applied to the flow channel structure of the bipolar plate of the hierarchical seawater-activated battery and the design method of the flow channel structure of the bipolar plate of the hierarchical seawater-activated battery, and the method includes:

[0128] H1, obtaining the basic data information of the bipolar plate;

[0129] H2, performing calculation and processing on the basic data information of the bipolar plate to obtain performance characterization information.

[0130] In an alternative embodiment, the basic data information of the bipolar plate is calculated and processed to obtain performance characterization information, including:

[0131] H21, using the lightweight degree model, process the basic data information of the bipolar plate to obtain the lightweight degree information;

[0132] Among them, the lightweight degree model is:

[0133]

[0134] In the formula, ε is the lightweight degree information, M o is the mass of the bipolar plate in the basic data information of the bipolar plate, M t is the mass of the preset traditional bipolar plate.

[0135] H22, using the bipolar plate pressure drop model, process the basic data information of the bipolar plate to obtain the pressure drop information;

[0136] Among them, the bipolar plate pressure drop model is:

[0137] ΔP = P in -P out ;

[0138] In the formula, ΔP is the pressure drop information, P in is the inlet pressure in the basic data information of the bipolar plate, P out is the outlet pressure in the basic data information of the bipolar plate.

[0139] H23, using the bipolar plate pump consumption calculation model, process the basic data information of the bipolar plate and the pressure drop information to obtain the pump consumption information;

[0140] Among them, the bipolar plate pump consumption calculation model is:

[0141]

[0142] In the formula, W pump is the pump consumption information, q is the seawater flow rate in the basic data information of the bipolar plate, η is the pump energy efficiency in the basic data information of the bipolar plate, ΔP is the pressure drop information, S RZ is the reaction zone area in the basic data information of the bipolar plate;

[0143] Preferably, η is 0.6.

[0144] H24, merge and process the lightweight degree information, pressure drop information and pump consumption information to obtain the performance characterization information.

[0145] Compare the traditional flow channel structure and the hierarchical seawater-activated battery bipolar plate flow channel structure (biomimetic flow channel) in the present invention according to the above design method and performance characterization method of the present invention (seeFigure 7 , Figure 8 ), it can be seen from the comparison results that the lightweight degree information of the bipolar plate flow channel structure in the present invention is 0.815%, the pressure drop information and pump consumption information are reduced by 26.2%, the proportion of the flow dead zone area in the reaction zone is decreased by 82.1%, the velocity peak value near the inlet is decreased from 0.55216 m / s to 0.26473 m / s, the peak shaving efficiency is as high as 52.1%, and the minimum velocity is increased from 0.00243 m / s to 0.00486 m / s, with a 100% increase. This further determines that the hierarchical seawater-activated battery bipolar plate flow channel structure proposed by the present invention has certain advantages.

[0146] It can be seen that the hierarchical seawater-activated battery bipolar plate flow channel structure of the present application has a high degree of lightweight. Since more flow channels are engraved on the bipolar plate flow channel structure, the quality of the plate is significantly reduced.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hierarchical seawater activated battery bipolar plate flow channel structure design method, characterized in that: The hierarchical seawater-activated battery bipolar plate flow channel structure comprises a bipolar plate flow channel body; The bipolar plate flow channel body is provided with two primary flow inlets, two secondary flow inlets and four tertiary flow inlets, one end of the two primary flow inlets is connected to the seawater inlet, the other end of each primary flow inlet is connected to one end of one secondary flow inlet, and the other end of each secondary flow inlet is connected to one end of two tertiary flow inlets; The bipolar plate flow channel body also includes a plurality of inlet branch flow channels, one end of the inlet branch flow channel is connected to the third-level inlet flow channel, and the other end is connected to the reaction area on the bipolar plate flow channel body; The method comprises: S1, using Solidworks modeling software, constructing physical model information of the bipolar plate flow channel structure of the hierarchical seawater activated battery according to the bipolar plate flow channel structure parameter information; S2, processing the physical model information to obtain the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information; S3, iteratively optimizing the physical model information according to the bipolar plate flow channel structure parameter information and the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information to obtain target bipolar plate flow channel structure parameter information; S4, processing the target bipolar plate flow channel structure parameter information to obtain a main line curve model of the three-stage inlet flow channel; The processing of the target bipolar plate flow channel structure parameter information to obtain the main line curve model of the three-level inlet flow channel is obtained by calculating and processing the target bipolar plate flow channel structure parameter information through a specified calculation model; The processing of the physical model information to obtain the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information includes: S21, pre-processing the physical model information through Spaceclaim to obtain fluid domain information; S22, meshing the fluid domain information through Fluent Meshing to obtain mesh information; S23, analyzing and processing the grid information to obtain the eddy flow area and reaction area of ​​the bipolar plate flow channel structure; The grid information is analyzed and processed to obtain the eddy flow area and the reaction area of ​​the bipolar plate flow channel structure, which is calculated by Fluent software and the calculation results are post-processed in CFD-Post; S24, using a bipolar plate flow channel calculation model, calculating and processing the eddy zone area and the reaction zone area to obtain an eddy zone area ratio corresponding to the bipolar plate flow channel structure parameter information; Wherein, the bipolar plate flow channel calculation model is: In the formula, A DR is the eddy current area ratio corresponding to the bipolar plate flow channel structure parameter information, A D and A t are the eddy zone area and the reaction zone area, δ1 is a first weight parameter, and the first weight parameter is obtained according to historical data.

2. The hierarchical seawater activated battery bipolar plate flow channel structure design method according to claim 1, characterized in that: The bipolar plate flow channel body is provided with two primary outlet flow channels, and one end of the two primary outlet flow channels is connected to the seawater outlet; The seawater inlet and the seawater outlet are arranged at two ends of the bipolar plate flow channel body opposite to each other, and a line connecting the seawater inlet, the seawater outlet and the center point of the bipolar plate flow channel body is a straight line; The main line curve model of the three-stage inlet channel is: Wherein, (x, y) is the coordinate information of the main line curve of the three-stage inlet channel, y0 and y1 are the first fitting coefficient and the second fitting coefficient, x0 is the deviation coefficient, A0, A2 and A2 are the first weight coefficient, the second weight coefficient and the third weight coefficient, t0, t1 and t2 are the third fitting coefficient, the fourth fitting coefficient and the fifth fitting coefficient, l is the first length, wherein, y0 = 215233.288, A0 = -1.91, t0 = 1.66, A1 = -215231.425, t1 = 563076.358, y1 = -0.866, x0 = 9.691, A2 = 6.693, t2 = 21.388, based on the three-stage inlet channel The connection between the tertiary inlet channel and the secondary inlet channel is taken as the origin, the extension direction of the tertiary inlet channel toward the reaction zone on the bipolar plate channel body and the direction parallel to the axis connecting the seawater inlet and the seawater outlet is taken as the Y axis, and the direction perpendicular to the Y axis and away from the seawater inlet of the tertiary inlet channel is taken as the X axis to obtain the two-dimensional plane coordinates, the main line curve of the tertiary inlet channel is distributed in the first quadrant of the two-dimensional plane coordinates, one end of the main line curve of the tertiary inlet channel is the origin of the two-dimensional plane coordinates, and the other end is in the first quadrant of the two-dimensional plane coordinates, and the first length is the projection of the line connecting one end and the other end of the main line curve of the tertiary inlet channel on the X axis of the two-dimensional plane coordinates.

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