Comb-tooth flow channel structure and design method for battery bipolar plate

Abstract

The present invention relates to the technical field of seawater activated batteries. A comb-tooth flow channel structure of a battery bipolar plate includes a primary reaction fluid inlet flow channel; a secondary reaction fluid inlet flow channel includes a first reaction fluid inlet area, a second reaction fluid inlet area and a third reaction fluid inlet area, wherein the first reaction fluid inlet area is arranged in the downstream center area of ​​the primary reaction fluid inlet flow channel; the second reaction fluid inlet area, the number is two, mirror-imaged on both sides of the first reaction fluid inlet area, the second reaction fluid inlet area includes a plurality of flow channels arranged along the flow direction of coastal water; the number of the third reaction fluid inlet area is two, correspondingly arranged on the side of the second reaction fluid inlet area away from the first reaction fluid inlet area, and the side of the end of the third reaction fluid inlet area close to the edge of the primary reaction fluid inlet flow channel has the same slope as the edge of the primary reaction fluid inlet flow channel.

Description

Technical Field

[0001] The invention relates to the technical field of seawater activated batteries, and in particular to a comb-tooth flow channel structure and a design method for a battery bipolar plate. Background Art

[0002] The existing seawater-activated battery bipolar plate flow guide structure generally adopts a vertical four-channel type, that is, after the electrolyte flows in from the inlet, it is diverted to the first branch flow channels on both sides, and then flows into the positive and negative electrodes through four preset second branch flow channels perpendicular to the first branch flow channels, realizing the electron transfer between the positive and negative electrodes, and then discharging. Although this method can enable the electrolyte to flow between the positive and negative plates and release battery energy to a certain extent, in the actual application of seawater-activated batteries, the right-angle design of the electrolyte flowing from the inlet into the first branch flow channel causes the electrolyte to flow unevenly between the positive and negative plates, which greatly affects the utilization rate of the positive and negative plates, and ultimately inhibits the energy efficiency of the battery body. In addition, the existing seawater-activated battery bipolar plate flow channel structure design methods are all designed for a specific size, and the research results are not universal. Summary of the invention

[0003] The present invention provides a comb-tooth flow channel structure and design method for a battery bipolar plate, which can solve the problem that the existing seawater-activated battery bipolar plate design is unreasonable, resulting in poor utilization of positive and negative plates and inhibiting the energy efficiency of the battery body.

[0004] A first aspect of the present invention provides a comb-tooth flow channel structure of a battery bipolar plate, comprising:

[0005] A primary reaction fluid inlet flow channel for seawater to flow in;

[0006] The secondary reaction fluid inlet flow channel is arranged downstream of the primary reaction fluid inlet flow channel, and includes a first reaction fluid inlet area, a second reaction fluid inlet area and a third reaction fluid inlet area, wherein:

[0007] The first reaction fluid inlet area is arranged in the downstream center area of ​​the first reaction fluid inlet flow channel;

[0008] The second reaction fluid inlet area is two in number and is arranged in a mirror image on both sides of the first reaction fluid inlet area. The second reaction fluid inlet area includes a plurality of flow channels arranged along the flow direction of the seawater;

[0009] There are two third reaction fluid inlet regions, which are correspondingly arranged on the side of the second reaction fluid inlet region away from the first reaction fluid inlet region, and the side of the end of the third reaction fluid inlet region close to the edge of the primary reaction fluid inlet flow channel has the same slope as the edge of the primary reaction fluid inlet flow channel;

[0010] a reaction zone, disposed downstream of the secondary reaction fluid inlet flow channel, for reacting seawater passing through the second reaction fluid inlet region;

[0011] The reaction fluid outlet channel is arranged downstream of the reaction zone and is used to discharge the seawater after the reaction in the reaction zone.

[0012] In some practicable embodiments, the primary reaction fluid inlet flow channel is an isosceles trapezoidal structure, and the lower base of the isosceles trapezoidal structure is connected to the reaction zone, and the lower base is the long side of the isosceles trapezoidal structure.

[0013] In some embodied embodiments, the secondary reaction fluid inlet flow channel is disposed within the primary reaction fluid inlet flow channel, so that the seawater enters the reaction zone within the primary reaction fluid inlet flow channel and through the secondary reaction fluid inlet flow channel.

[0014] In some operative embodiments, the first reaction fluid inlet region includes at least four first comb teeth, so that flow channels are formed between the four first comb teeth, and between the four first comb teeth and adjacent second reaction fluid inlet regions, respectively, wherein the four first comb teeth wrap a portion of the inlet of the first-level reaction fluid inlet channel at one end away from the reaction zone.

[0015] In some embodiments, the second reaction fluid inlet area includes a plurality of second comb teeth, and flow channels are formed between the plurality of second comb teeth.

[0016] In some embodiments, the third reaction fluid inlet area includes at least two third comb teeth, and the ends of the two third comb teeth away from the reaction zone have the same slope as the edge of the adjacent first reaction fluid inlet channel, and flow channels are formed between the two third comb teeth, between the two third comb teeth and the first reaction fluid inlet channel, and between the two third comb teeth and the second reaction fluid inlet area.

[0017] Some practicable methods further include a plurality of spoiler columns, wherein the plurality of spoiler columns are regularly distributed in the reaction zone.

[0018] In some embodiments, the reaction fluid outlet flow channel includes:

[0019] A first-stage reaction fluid outlet flow channel, having the same structure as the first reaction fluid inlet;

[0020] The secondary reaction fluid outlet flow channel is arranged upstream of the primary reaction fluid outlet flow channel, and includes a first reaction fluid outlet flow channel region, a second reaction fluid outlet flow channel region and a third reaction fluid outlet flow channel region, wherein:

[0021] The first reaction fluid outlet flow channel region is arranged in the upstream central region of the first reaction fluid outlet flow channel, and wraps a portion of the outlet of the first reaction fluid outlet flow channel;

[0022] The second reaction fluid outlet flow channel region has the same structure as the second reaction fluid inlet region;

[0023] The third reaction fluid outlet flow channel region has the same structure as the third reaction fluid inlet region.

[0024] In some embodiments, the primary reaction fluid inlet channel is connected to an edge adjacent to the reaction zone.

[0025] A second aspect of the present invention provides a method for designing a comb-tooth flow channel structure of a battery bipolar plate, which is applied to the aforementioned comb-tooth flow channel structure of a battery bipolar plate, and the method comprises:

[0026] S1, establish a preliminary comb-tooth-like bipolar plate flow channel structure for seawater-activated batteries;

[0027] S2, obtaining an initial three-dimensional model of the flow channel structure of the bipolar plate of the seawater activated battery based on the preliminary imitation comb-tooth type seawater activated battery bipolar plate;

[0028] S3, meshing the initial three-dimensional model to obtain a mesh shape after meshing;

[0029] S4, performing numerical simulation on the flow field performance of the preliminary comb-tooth-like seawater-activated battery bipolar plate flow channel according to the grid shape to obtain simulation results;

[0030] S5, iteratively optimizing the parameters of the initial three-dimensional model according to the simulation result to obtain an iteratively optimized target three-dimensional model;

[0031] S6, performing performance analysis based on the target three-dimensional model to obtain analysis results.

[0032] Beneficial effects of the present invention:

[0033] The present invention discloses a comb-tooth flow channel structure for a battery bipolar plate, wherein seawater is introduced into a primary reaction fluid inlet flow channel; seawater enters a reaction zone through a secondary reaction fluid inlet flow channel. The secondary reaction fluid inlet flow channel comprises a first reaction fluid inlet region, a second reaction fluid inlet region and a third reaction fluid inlet region, wherein the first reaction fluid inlet region is arranged in the downstream central region of the primary reaction fluid inlet flow channel; the second reaction fluid inlet region is two in number, and is mirror-imaged on both sides of the first reaction fluid inlet region, and the second reaction fluid inlet region comprises a plurality of flow channels arranged along the flow direction of coastal water; the third reaction fluid inlet region is two in number, and is correspondingly arranged on a side of the second reaction fluid inlet region away from the first reaction fluid inlet region, and the side of the end of the third reaction fluid inlet region close to the edge of the primary reaction fluid inlet flow channel has the same slope as the edge of the primary reaction fluid inlet flow channel; the reaction zone is arranged downstream of the secondary reaction fluid inlet flow channel, and reacts to the seawater passing through the second reaction fluid inlet region; the reaction fluid outlet flow channel is arranged downstream of the reaction zone, and is used to discharge the seawater after the reaction through the reaction zone.

[0034] The seawater activated battery bipolar plate structure can effectively converge the electrolyte to the outlet and discharge when flowing out of the bipolar plate. It can not only minimize the momentum conversion of the electrolyte in the process of flowing through the primary and secondary flow channels, but also make the electrolyte flow into the reaction area more quickly, further improving the uniformity of electrolyte distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a schematic structural diagram of a comb-tooth flow channel structure of a battery bipolar plate according to the present invention;

[0037] Figure 2 It is a structural schematic diagram of a primary reaction fluid inlet flow channel and a secondary reaction fluid inlet flow channel of a comb-tooth-shaped flow channel structure of a battery bipolar plate of the present invention;

[0038] Figure 3 A schematic diagram of the seawater flow direction of the primary reaction fluid inlet flow channel and the secondary reaction fluid inlet flow channel of a comb-tooth-shaped flow channel structure of a battery bipolar plate of the present invention;

[0039] Figure 4 This is a comparison diagram before and after optimization of a comb-tooth flow channel structure of a battery bipolar plate of the present invention.

[0040] Description of reference numerals:

[0041] 1. Primary reaction fluid inlet flow channel; 2. Secondary reaction fluid inlet flow channel; 21. First reaction fluid inlet area; 22. Second reaction fluid inlet area; 23. Third reaction fluid inlet area; 3. Flow channel inlet; 4. Reaction fluid outlet flow channel; 5. Flow channel outlet; 6. Reaction zone; 7. Turbine column. DETAILED DESCRIPTION

[0042] 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of 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 circumstances.

[0045] Seawater-activated batteries are batteries that use the chemical reaction between positive and negative electrodes (such as positive electrode AgO, negative electrode Al) and electrolytes to generate electrical energy. In seawater-activated batteries, the positive and negative electrodes are kept apart by pasting several diaphragm particles in the middle. When the battery is running, the circulating electrolyte flows between the bipolar plates to produce electrons and ions through chemical reactions. Electrons are transported through an external circuit, and ions are transferred through the electrolyte. Under the action of the electric field force, the ions migrate through the electrolyte to the plates to form a loop and generate current. At the same time, since the electrochemical reaction itself will generate a certain amount of heat and by-products, this will cause the battery performance to decline. A better electrolyte flow field can take away most of the heat and by-products after the electrochemical reaction. Therefore, the rationality of the design of the bipolar plate flow channel structure used to guide the flow of electrolyte is crucial to improving the battery discharge performance.

[0046] In the prior art, some work has been done on the design of bipolar plate channel structures for guiding electrolyte flow, but the universality of bipolar plate channel structure parameter design and the uniformity of electrolyte flow field have not been considered, and further optimization is still possible.

[0047] The existing seawater-activated battery bipolar plate flow guide structure generally adopts a vertical four-channel type, that is, after the electrolyte flows in from the inlet, it is diverted to the first branch flow channel on both sides, and then flows into the positive and negative electrodes through four preset second branch flow channels perpendicular to the first branch flow channel, realizing the electron transfer between the positive and negative electrodes, and then discharging. Although this method can enable the electrolyte to flow into the positive and negative plates and release battery power to a certain extent, in the actual application of seawater-activated batteries, the electrolyte has a 90° corner when it flows from the inlet into the first branch flow channel, and then there is also a 90° corner when it flows from the first branch flow channel into the second branch flow channel. The two large-angle deflections cause the electrolyte to violently hit the flow channel wall, causing the electrolyte molecular momentum to change sharply, thereby causing the electrolyte to flow unevenly between the positive and negative plates, which greatly affects the utilization rate of the positive and negative plates, and ultimately inhibits the energy efficiency of the battery body. In addition, the existing seawater-activated battery bipolar plate flow channel structure design methods are all designed for a certain specific size, and the research results are not universal.

[0048] In summary, there is an urgent need for a comb-tooth flow channel structure and design method for a battery bipolar plate with uniform flow field, good electrolyte dredging effect, small fluid flow resistance and universal design parameters.

[0049] The purpose of the present invention is to propose a seawater-activated battery bipolar plate structure in which the electrolyte can be evenly and quickly divided when flowing into the bipolar plate, and can effectively converge the electrolyte to the outlet and discharge it when flowing out of the bipolar plate; this structure can not only minimize the momentum conversion of the electrolyte in the process of flowing through the primary and secondary flow channels, but also make the electrolyte flow into the reaction zone more quickly; at the same time, the flow channel structure of the seawater-activated battery bipolar plate is designed by dimensionless means, which can achieve the universality of small-scale to large-scale structural parameter design; in addition, corresponding fillets are set at the corners of each branch flow channel, which can reduce the turbulent kinetic energy of the electrolyte and further improve the uniformity of electrolyte distribution.

[0050] like Figures 1 to 4 As shown, the first aspect of the present invention provides a comb-tooth flow channel structure of a battery bipolar plate, comprising a primary reaction fluid inlet flow channel 1, a secondary reaction fluid inlet flow channel 2, a reaction zone 6 and a reaction fluid outlet flow channel 4.

[0051] The primary reaction fluid inlet channel 1 is used for seawater to flow in. The primary reaction fluid inlet channel 1 is an isosceles trapezoidal structure, and the lower base of the isosceles trapezoidal structure is connected to the reaction zone 6 to form a whole.

[0052] The secondary reaction fluid inlet flow channel 2 is arranged downstream of the primary reaction fluid inlet flow channel 1 , and includes a first reaction fluid inlet area 21 , a second reaction fluid inlet area 22 and a third reaction fluid inlet area 23 .

[0053] The first reaction fluid inlet area 21 is arranged in the downstream center area of ​​the first reaction fluid inlet channel 1 .

[0054] There are two second reaction fluid inlet regions 22 , which are arranged in a mirror-like manner on both sides of the first reaction fluid inlet region 21 . The second reaction fluid inlet region 22 includes a plurality of flow channels arranged along the flow direction of the seawater.

[0055] There are two third reaction fluid inlet areas 23, which are correspondingly arranged on the side of the second reaction fluid inlet area 22 away from the first reaction fluid inlet area 21, and the side of the end of the third reaction fluid inlet area 23 close to the edge of the first reaction fluid inlet channel 1 has the same slope as the edge of the first reaction fluid inlet channel 1.

[0056] Specifically, the secondary reaction fluid inlet flow channel 2 is arranged in the primary reaction fluid inlet flow channel 1, so that the seawater enters the reaction zone 6 through the secondary reaction fluid inlet flow channel 2 in the primary reaction fluid inlet flow channel 1. That is to say, when the seawater enters the first reaction fluid inlet through the inlet of the primary reaction fluid inlet flow channel 1, it passes through the secondary reaction fluid inlet flow channel 2 to reach the reaction zone 6, and the function of the secondary reaction fluid inlet flow channel 2 is to uniformly enter the seawater in the primary reaction fluid inlet flow channel 1, so that the seawater can uniformly enter the reaction zone 6 and fully react in the reaction zone 6.

[0057] It should be noted that the first reaction fluid inlet region 21 includes at least four first comb teeth, so that flow channels are formed between the four first comb teeth, and between the four first comb teeth and the adjacent second reaction fluid inlet regions 22, wherein the four first comb teeth wrap part of the inlet of the primary reaction fluid inlet flow channel 1 at one end away from the reaction zone 6. The number of the four first comb teeth can be adjusted as needed, and flow channels are formed between the first comb teeth, so that seawater enters the reaction zone 6 through the flow channels. Among the four first comb teeth, the lengths of the two middle first comb teeth are smaller than the other two first comb teeth, and the ends of the two middle first comb teeth have inclined surfaces.

[0058] The second reaction fluid inlet area 22 includes a plurality of second comb teeth, and a flow channel is formed between the plurality of second comb teeth. The spacing between the plurality of second comb teeth is adjusted according to the law of seawater flow. For example, the number of the second comb teeth is 5,

[0059] The third reaction fluid inlet area 23 includes at least two third comb teeth, and the ends of the two third comb teeth away from the reaction zone 6 have the same slope as the edge of the adjacent first reaction fluid inlet channel 1, and flow channels are formed between the two third comb teeth, between the two third comb teeth and the first reaction fluid inlet channel 1, and between the two third comb teeth and the second reaction fluid inlet area 22.

[0060] Each group of third comb teeth includes at least two third comb teeth, and the shapes of the two third comb teeth are different, wherein the length of the third comb teeth close to the second reaction fluid inlet area 22 is greater than the third comb teeth away from the second reaction fluid inlet area 22, so that the two third comb teeth have the same slope as the edge of the primary reaction fluid inlet channel 1, avoiding the seawater from colliding with the edge of the primary reaction fluid inlet channel 1 when passing through the third comb teeth, reducing the change in momentum of the electrolyte molecules, and improving the utilization rate of the positive and negative plates.

[0061] The reaction zone 6 is arranged downstream of the secondary reaction fluid inlet flow channel 2 and is used to react the seawater passing through the second reaction fluid inlet area.

[0062] Among them, a plurality of spoiler columns 7 are arranged on the reaction zone 6, and the plurality of spoiler columns 7 are regularly distributed in the reaction zone 6. Exemplarily, the spoiler columns 7 are arranged in a matrix manner in the reaction zone 6, so that the seawater passing through the reaction zone 6 will pass through the spoiler columns 7, and then flow into the reaction fluid outlet channel 4.

[0063] The reaction fluid outlet channel 4 is arranged downstream of the reaction zone 6 and is used to discharge the seawater after the reaction in the reaction zone 6 .

[0064] Wherein, the reaction fluid outlet flow channel 4 includes a primary reaction fluid outlet flow channel 4 and a secondary reaction fluid outlet flow channel 4 .

[0065] Specifically, the structure of the primary reaction fluid outlet channel 4 is the same as that of the first reaction fluid inlet channel, both of which are trapezoidal structures, and will not be described in detail here.

[0066] The secondary reaction fluid outlet flow channel 4 is arranged upstream of the primary reaction fluid outlet flow channel 4 , and includes a first reaction fluid outlet flow channel 4 region, a second reaction fluid outlet flow channel 4 region and a third reaction fluid outlet flow channel 4 region.

[0067] The first reaction fluid outlet flow channel 4 region is arranged in the upstream center region of the first reaction fluid outlet flow channel 4, and wraps a portion of the outlet of the first reaction fluid outlet flow channel 4. The second reaction fluid outlet flow channel 4 region has the same structure as the second reaction fluid inlet region 22, and will not be described in detail here. The third reaction fluid outlet flow channel 4 region has the same structure as the third reaction fluid inlet region 23, and will not be described in detail here.

[0068] It should be noted that the primary reaction fluid inlet flow channel 1 is connected to the edge adjacent to the reaction zone 6 so as to ensure the contact area between the reaction zone 6 and the primary reaction fluid inlet flow channel 1 .

[0069] A second aspect of the present invention provides a method for designing a comb-tooth flow channel structure of a battery bipolar plate, which is applied to the aforementioned comb-tooth flow channel structure of a battery bipolar plate, and the method comprises:

[0070] S1, establish a preliminary comb-tooth-like bipolar plate flow channel structure for seawater-activated batteries;

[0071] S2, obtaining an initial three-dimensional model of the flow channel structure of the bipolar plate of the seawater activated battery based on the preliminary imitation comb-tooth type seawater activated battery bipolar plate;

[0072] S3, meshing the initial three-dimensional model to obtain a mesh shape after meshing;

[0073] S4, performing numerical simulation on the flow field performance of the preliminary comb-tooth-like seawater-activated battery bipolar plate flow channel according to the grid shape to obtain simulation results;

[0074] S5, iteratively optimizing the parameters of the initial three-dimensional model according to the simulation result to obtain an iteratively optimized target three-dimensional model;

[0075] S6, performing performance analysis based on the target three-dimensional model to obtain analysis results.

[0076] Example

[0077] like Figures 1 to 4 As shown, a comb-tooth flow channel structure of a battery bipolar plate includes a primary reaction fluid inlet flow channel 1, a secondary reaction fluid inlet flow channel 2, a flow channel inlet 3, a primary reaction fluid outlet flow channel 4, a secondary reaction fluid outlet flow channel 4, a flow channel outlet 5, a reaction zone 6 and a spoiler column 7.

[0078] Among them, the secondary reaction fluid inlet flow channel 2 is divided into the first reaction fluid inlet area 21, the second reaction fluid inlet area 22 and the third reaction fluid inlet area 23. The flow channels in the secondary reaction fluid inlet flow channel 2 are marked as A to M. The left and right parts of the secondary reaction fluid inlet flow channel 2 at the flow channel inlet 3 are axially symmetrically distributed about the first reaction fluid inlet area 21. Except for the flow channels on both sides of the center of the first reaction fluid inlet area 21, the inlet flow channels are symmetrically distributed about the horizontal center line. The preliminary comb-tooth type seawater activated battery bipolar plate flow channels only have the primary reaction fluid inlet flow channel 1 and the secondary reaction fluid inlet flow channel 2, and the structural parameters are consistent with the optimized ones, such as Figure 2 As shown. Among them, the distance between the flow channel at the flow channel inlet 3 and the edge of the reaction zone 6 is 15mm, and the width L1Zn=0.33D; the inclination angle α of the secondary oblique flow channels on both sides ranges from 50 to 60°, and its width L2Xn=0.22D; the secondary main flow channel on the left side of the vertical center line at the inlet and outlet ( Figure 2 The center distances of the relatively wide flow channels (B, D, H, and M) in the middle flow channel are 84 mm, 200 mm, and 155 mm, respectively. The right and left sides of the vertical center line at the flow channel inlet 3 and the flow channel outlet 5 are symmetrically distributed about the vertical center line, and its width L2Zn = 0.25D; the width of the flow channel C at the flow channel inlet 3 and the flow channel outlet 5 is L2CBn = 0.125D, and the center distance from the secondary main flow channel B is 34.5 mm. The same secondary secondary flow channel ( Figure 2The center distance of flow channels E, F, and G at the flow channel inlet 3 and the flow channel outlet 5 is 50 mm, and the spacing from flow channels D and H on both sides is 60 mm; the width of flow channel I at the flow channel inlet 3 and the flow channel outlet 5 is 1 mm, and the distance from flow channel H is 45.9 mm, and the same flow channels are arranged on the right side symmetrically distributed about the vertical center line; in addition, in order to further improve the uniform fluid distribution effect at the primary reaction fluid inlet flow channel 1, two secondary sub-flow channels are opened on the reaction fluid flow channel inlet 3, and the width of the secondary sub-flow channel L is L2CBn=0.125D, and the center distance from the secondary sub-flow channel I is 52.06 mm, and the same secondary sub-flow channels are arranged on the right side symmetrically distributed about the vertical center line; compared with the flow channels at the flow channel inlet 3, the reaction fluid outlet flow channel 4 is not provided with secondary sub-flow channels symmetrically distributed about the vertical center line, such as Figure 2 As shown; the depth of each of the above-mentioned flow channels is 1mm, and the chamfer radius at the corner is 0.5mm; the bipolar plate reaction area 6 is a square area of ​​100mm*100mm, on which cylindrical spoiler columns 7 with an interval of 10mm, a height of 0.5mm, and an upper and lower circle diameter of 2mm are arranged.

[0079] When the seawater activated battery is working, the reaction fluid circulation mode is as follows: the reaction fluid enters from the primary reaction fluid inlet flow channel 1 and the secondary reaction fluid inlet flow channel 2 at the inlet, and then flows evenly through the primary reaction fluid inlet flow channel 1 into each secondary reaction fluid inlet flow channel 2 at the inlet and flows into the reaction zone 6. Under the action of the spoiler column 7, the kinetic energy of the fluid in the reaction zone 6 is further increased, the fluid mass transfer capacity is improved, and the utilization rate of the electrode plate of the seawater activated battery is improved. The reacted fluid converges to the reaction fluid outlet flow channel 4 through each secondary primary and secondary flow channel at the outlet. The specific circulation mode is as follows: Figure 3 The effect is as shown. Figure 4 As shown, Figure 4 It includes the comparison before and after adjustment. The model before adjustment is the basic model, and the model after adjustment is the optimized model.

[0080] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A comb-tooth flow channel structure for a battery bipolar plate, characterized in that: include: A primary reaction fluid inlet flow channel for seawater to flow in; The secondary reaction fluid inlet flow channel is arranged downstream of the primary reaction fluid inlet flow channel, and includes a first reaction fluid inlet area, a second reaction fluid inlet area and a third reaction fluid inlet area, wherein: The first reaction fluid inlet area is arranged in the downstream center area of ​​the first reaction fluid inlet flow channel; The second reaction fluid inlet area is two in number and is disposed in a mirror-like manner on both sides of the first reaction fluid inlet area. The second reaction fluid inlet area includes a plurality of flow channels arranged along the flow direction of the seawater; There are two third reaction fluid inlet regions, which are correspondingly arranged on the side of the second reaction fluid inlet region away from the first reaction fluid inlet region, and the side of the end of the third reaction fluid inlet region close to the edge of the primary reaction fluid inlet flow channel has the same slope as the edge of the primary reaction fluid inlet flow channel; a reaction zone, disposed downstream of the secondary reaction fluid inlet flow channel, for reacting seawater passing through the second reaction fluid inlet region; The reaction fluid outlet channel is arranged downstream of the reaction zone and is used to discharge the seawater after the reaction in the reaction zone; wherein, The primary reaction fluid inlet flow channel is an isosceles trapezoidal structure, and the lower base of the isosceles trapezoidal structure is connected to the reaction zone, and the lower base is the long side of the isosceles trapezoidal structure; The secondary reaction fluid inlet flow channel is arranged in the primary reaction fluid inlet flow channel, so that the seawater enters the reaction zone in the primary reaction fluid inlet flow channel through the secondary reaction fluid inlet flow channel; The first reaction fluid inlet region comprises at least four first comb teeth, so that flow channels are formed between the four first comb teeth and between the four first comb teeth and the adjacent second reaction fluid inlet regions, wherein one end of the four first comb teeth away from the reaction zone wraps a portion of the inlet of the primary reaction fluid inlet flow channel; The second reaction fluid inlet region includes a plurality of second comb teeth, and flow channels are formed between the plurality of second comb teeth; The third reaction fluid inlet area includes at least two third comb teeth, and the ends of the two third comb teeth away from the reaction zone have the same slope as the edge of the adjacent first reaction fluid inlet channel, and flow channels are formed between the two third comb teeth, between the two third comb teeth and the first reaction fluid inlet channel, and between the two third comb teeth and the second reaction fluid inlet area.

2. The comb-tooth flow channel structure of the battery bipolar plate according to claim 1, characterized in that: It also includes a plurality of spoiler columns, which are regularly distributed in the reaction zone.

3. The comb-tooth flow channel structure of the battery bipolar plate according to claim 1, characterized in that: The reaction fluid outlet flow channel comprises: A first-stage reaction fluid outlet flow channel, having the same structure as the first reaction fluid inlet; The secondary reaction fluid outlet flow channel is arranged upstream of the primary reaction fluid outlet flow channel, and includes a first reaction fluid outlet flow channel region, a second reaction fluid outlet flow channel region and a third reaction fluid outlet flow channel region, wherein: The first reaction fluid outlet flow channel region is arranged in the upstream central region of the first reaction fluid outlet flow channel, and wraps a portion of the outlet of the first reaction fluid outlet flow channel; The second reaction fluid outlet flow channel region has the same structure as the second reaction fluid inlet region; The third reaction fluid outlet flow channel region has the same structure as the third reaction fluid inlet region.

4. A method for designing a comb-tooth flow channel structure of a battery bipolar plate, characterized in that: The comb-tooth flow channel structure of a battery bipolar plate applied to any one of claims 1 to 3, the method comprising: S1, establish a preliminary comb-tooth-like bipolar plate flow channel structure for seawater-activated batteries; S2, obtaining an initial three-dimensional model of the flow channel structure of the bipolar plate of the seawater activated battery based on the preliminary imitation comb-tooth type seawater activated battery bipolar plate; S3, meshing the initial three-dimensional model to obtain a mesh shape after meshing; S4, performing numerical simulation on the flow field performance of the preliminary comb-tooth-like seawater-activated battery bipolar plate flow channel according to the grid shape to obtain simulation results; S5, iteratively optimizing the parameters of the initial three-dimensional model according to the simulation result to obtain an iteratively optimized target three-dimensional model; S6, performing performance analysis based on the target three-dimensional model to obtain analysis results.

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