A seawater activated battery bipolar plate guide groove and evaluation method

Abstract

The present invention discloses a guide groove for a seawater-activated battery bipolar plate and a performance evaluation method. The guide groove for a seawater-activated battery bipolar plate comprises a guide groove body for a seawater-activated battery bipolar plate, a spoiler groove, a first guide groove and a second guide groove; a liquid inlet is provided at one end of the guide groove body for a seawater-activated battery bipolar plate, and a liquid outlet is provided at the other end of the guide groove body for a seawater-activated battery bipolar plate; the spoiler groove is provided on the guide groove body for a seawater-activated battery bipolar plate, and a plurality of spoiler columns are provided on the spoiler groove. The present invention has a strong practical guiding significance for the design of the guide groove for a seawater-activated battery bipolar plate.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a bipolar plate guide groove for a seawater-activated battery and a performance evaluation method. Background Art

[0002] As a power generation device with short energy storage time, low maintenance frequency, strong load capacity and high energy density, seawater-activated batteries have been widely used in many fields such as communications, lighting and special equipment. Among them, the key components of seawater-activated batteries are positive and negative electrodes and bipolar plates. The former is the place where electrochemical reactions occur, and the latter is to provide the electrolyte required for the electrochemical reaction, realize the electron transfer between the positive and negative plates, remove the by-products produced by the electrochemical reaction, and play a certain supporting role (maintaining uniform force on the positive and negative electrodes). Specifically, the bipolar plate uses the flow guide grooves engraved on it to guide the flow of electrolyte, ensuring that the electrolyte can be quickly and evenly distributed between the positive and negative plates, so that it can undergo electrochemical reactions and then discharge. If the design of the flow guide grooves is unreasonable, it will directly affect the flow characteristics of the electrolyte, causing uneven reactions at various locations of the electrodes, causing uneven current density distribution, resulting in low utilization of the positive and negative electrodes of the battery, local overheating and other undesirable phenomena, thereby reducing the discharge performance of the battery. Therefore, the design of the bipolar plate flow guide grooves is directly related to the performance of the seawater-activated battery and the uniformity of the performance of each monomer in the battery module.

[0003] The existing seawater-activated battery bipolar plate flow guide structure generally adopts a vertical channel type, that is, after the electrolyte flows in from the inlet, it is diverted to the first branch channel on both sides, and then flows into the positive and negative electrodes through the preset second branch channel perpendicular to the first branch channel, realizing the electron transfer between the positive and negative electrodes, and then discharging. Although this method can make the electrolyte flow between 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 channel, and then there is also a 90° corner when it flows from the first branch channel into the second branch channel. The two large-angle deflections cause the electrolyte to violently hit the channel wall, causing the electrolyte molecular momentum to change sharply, resulting in uneven distribution of the electrolyte flowing 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.

[0004] In summary, the study of the flow guide structure of the bipolar plate of the seawater-activated battery is an effective research method to further improve the battery performance, and the current design method for the flow guide structure of the bipolar plate of the seawater-activated battery is still insufficient.

[0005] Therefore, how to provide a seawater-activated battery bipolar plate guide groove with uniform liquid supply, safety and reliability, simple structure and easy processing, as well as a corresponding performance evaluation method, is a key issue that needs to be solved urgently. Summary of the invention

[0006] The present invention provides a guide groove for a seawater-activated battery bipolar plate and a performance evaluation method, wherein the guide groove for the seawater-activated battery bipolar plate can not only minimize the momentum conversion of the electrolyte in the process of flowing through the first flow channel area, the second flow channel area, the third flow channel area and the fourth flow channel area, but also enable the electrolyte to flow into the guide groove body and the liquid outlet of the seawater-activated battery bipolar plate more quickly. In addition, setting corresponding inclination angles at the connection between the first flow channel area and the second flow channel area, and the third flow channel area and the fourth flow channel area can reduce the turbulent kinetic energy of the electrolyte and further improve the distribution uniformity of the electrolyte. Therefore, the present invention has a strong practical guiding significance for the design of the guide structure of the seawater-activated battery bipolar plate. The specific contents are as follows:

[0007] The present invention provides a seawater-activated battery bipolar plate guide groove, comprising a seawater-activated battery bipolar plate guide groove body, a spoiler groove, a first guide groove and a second guide groove;

[0008] One end of the main body of the bipolar plate guide groove of the seawater activated battery is provided with a liquid inlet, and the other end of the main body of the bipolar plate guide groove of the seawater activated battery is provided with a liquid outlet;

[0009] The spoiler channel is arranged on the main body of the guide channel of the bipolar plate of the seawater-activated battery, and a plurality of spoiler columns are arranged on the spoiler channel;

[0010] The first guide groove is arranged on the guide groove body of the seawater activated battery bipolar plate, and includes a plurality of first branch guide grooves, and the plurality of first branch guide grooves are arranged on both sides of the line connecting the center point of the liquid inlet and the center point of the spoiler groove; one end of the first branch guide groove is connected to the liquid inlet, and the other end is connected to the spoiler groove;

[0011] The second guide groove is arranged on the guide groove body of the seawater activated battery bipolar plate, and includes a plurality of second branch guide grooves, and the plurality of second branch guide grooves are arranged on both sides of the line connecting the center point of the liquid outlet and the center point of the spoiler groove; one end of the second branch guide groove is connected to the liquid outlet, and the other end is connected to the spoiler groove;

[0012] The first guide groove is used to guide the liquid to be evenly distributed into the spoiler channel; the second guide groove is used to guide the liquid to be evenly distributed to the liquid outlet.

[0013] In some embodiments, the first branch guide groove includes a first flow channel area and a second flow channel area, one end of the first flow channel area is connected to the liquid inlet, and the other end is connected to the second flow channel area; the end of the second flow channel area away from the first flow channel area is connected to the spoiler channel; the connection between the first flow channel area and the second flow channel area is a deflection angle of 30°-65°.

[0014] In some embodied embodiments, the second flow channel region includes one first outer edge acceleration flow channel groove and a plurality of first flow channel grooves; one end of the first outer edge acceleration flow channel groove and the first flow channel groove are both connected to the first flow channel region, and the other end are both connected to the spoiler channel.

[0015] In some embodiments, the second branch guide channel includes a third flow channel area and a fourth flow channel area, one end of the third flow channel area is connected to the liquid outlet, and the other end is connected to the fourth flow channel area; one end of the fourth flow channel area away from the third flow channel area is connected to the spoiler channel; the connection between the third flow channel area and the fourth flow channel area is a deflection angle of 30°-65°.

[0016] In some implementations, the fourth flow channel area includes one second outer edge acceleration flow channel groove and a plurality of second flow channel grooves; one end of the second outer edge acceleration flow channel groove and the second flow channel groove are connected to the third flow channel area, and the other end is connected to the spoiler channel.

[0017] In some practicable embodiments, the width of the end of the first branch flow guide groove connected to the liquid inlet is 2 mm-4 mm; the width of the end of the second branch flow guide groove connected to the liquid outlet is 2 mm-4 mm;

[0018] The spoiler channel is detachable from the main body of the seawater activated battery bipolar plate guide channel; the spoiler channel is rectangular, 100mm-150mm long and 100mm-150mm wide;

[0019] One end of the spoiler column is fixedly connected to the bottom surface of the spoiler channel, and the other end is in the same horizontal plane as the side of the seawater activated battery bipolar plate guide channel body provided with the spoiler channel;

[0020] The intervals between the plurality of spoiler columns are 8mm-20mm;

[0021] The first flow channel area and the third flow channel area are both flow channels with an inclination angle of 30°-60°;

[0022] The cross-section of the first outer edge accelerating flow channel groove, the cross-section of the second outer edge accelerating flow channel groove, the cross-section of the first flow channel groove and the cross-section of the second flow channel groove are all rectangular, with a length of 3mm-5mm and a width of 0.3mm-0.6mm.

[0023] In some practicable embodiments, the first outer edge accelerating flow channel groove and the first flow channel groove are both gradually expanding, and the gradually expanding width ranges from 1.3 mm to 5 mm; the interval between the first outer edge accelerating flow channel groove and the first flow channel groove closest to the first outer edge accelerating flow channel groove ranges from 1.5 mm to 4 mm, and the interval between the first flow channel grooves ranges from 1.5 mm to 4 mm;

[0024] The first outer edge accelerating channel groove comprises a first buffer section channel groove and a first accelerating section channel groove; the length ratio of the first buffer section channel groove to the first accelerating section channel groove is 4:1;

[0025] The second outer edge accelerating flow channel groove and the second flow channel groove are both gradually expanding, and the gradually expanding width ranges from 1.3 mm to 5 mm; the interval range between the second outer edge accelerating flow channel groove and the second flow channel groove closest to the second outer edge accelerating flow channel groove is 1.5 mm to 4 mm, and the interval range between the second flow channel grooves is 1.5 mm to 4 mm;

[0026] The second outer edge acceleration flow channel groove includes a second buffer section flow channel groove and a second acceleration section flow channel groove; the length ratio of the second buffer section flow channel groove to the second acceleration section flow channel groove is 4:1.

[0027] In some practicable embodiments, the edge curve parameter of the first branch guide groove is y;

[0028] Wherein, the expression of y is:

[0029]

[0030] Wherein, y is the edge curve parameter of the first branch guide groove, G is the first length, h is the second length, D is the third length, and x is m is the first proportional coefficient, y0 is the first fitting coefficient, A1 and A2 are the second fitting coefficient and the third fitting coefficient, t1 and t2 are the fourth fitting coefficient and the fifth fitting coefficient.

[0031] In some practicable embodiments, the edge curve parameter of the second branch guide groove is s;

[0032] Wherein, the expression of s is:

[0033]

[0034] Where, s is the edge curve parameter of the second branch guide groove, E is the fourth length, f is the fifth length, P is the sixth length, z m is the second proportional coefficient, s0 is the sixth fitting coefficient, B1 and B2 are the seventh fitting coefficient and the eighth fitting coefficient, t3 and t4 are the ninth fitting coefficient and the tenth fitting coefficient.

[0035] The present invention also provides a method for evaluating the performance of a bipolar plate guide groove of a seawater-activated battery, which is applied to the bipolar plate guide groove of the seawater-activated battery, and the method comprises:

[0036] S1, acquiring characteristic line velocity value information, area information and time information; the characteristic line velocity value information includes a maximum value, a minimum value and a velocity value sequence; the area information includes a gas phase area and a plate area; the time information includes first time information, second time information and third time information;

[0037] S2, using the first guide groove model, calculating the maximum value, the minimum value and the flow velocity value sequence to obtain flow velocity information of the guide groove; the guide groove includes a spoiler groove, a first guide groove and a second guide groove;

[0038] Wherein, the first guide channel model is:

[0039]

[0040] Wherein, LS is the flow velocity information of the guide groove, CS is the first correction parameter, ZD is the maximum value, ZX is the minimum value, and PJ is the flow velocity value sequence;

[0041] S3, using the second flow guide groove model, calculating the gas phase area and the electrode plate area to obtain the proportion information of the flow guide groove;

[0042] Wherein, the second guide channel model is:

[0043]

[0044] Wherein, AGR is the proportion information of the guide groove, CSS is the second correction parameter, AG is the gas phase area, and AT is the plate area;

[0045] S4, using a third guide channel model, calculating the first time information, the second time information and the third time information to obtain flow velocity time information of the guide channel;

[0046] Wherein, the third guide channel model is:

[0047] T = U1*T1+U2*T2+U3*T3;

[0048] Wherein, T is the flow velocity time information of the guide groove, T1 is the first time information, T2 is the second time information, T3 is the third time information, U1 is the third correction parameter, U2 is the fourth correction parameter, and U3 is the fifth correction parameter;

[0049] S5, performing performance evaluation calculation on the guide groove of the seawater-activated battery bipolar plate according to the flow velocity information, the proportion information and the flow velocity time information of the guide groove, and obtaining performance evaluation result information of the guide groove of the seawater-activated battery bipolar plate;

[0050] Among them, the expression for performance evaluation calculation is:

[0051] XNPJ = α*LS + β*AGR + γ*T;

[0052] Wherein, XNPJ is the performance evaluation result information, α is the first correction factor, β is the second correction factor, γ is the third correction factor, LS is the flow rate information, AGR is the proportion information, and T is the flow rate time information.

[0053] The beneficial effect of the present invention is that a first branch flow guide groove and a second branch flow guide groove are arranged on the first flow guide groove and the second flow guide groove, and a plurality of spoiler columns are arranged on the spoiler groove to form a flow guide groove, which is used to guide the electrolyte of the seawater-activated battery to move along the trajectory of the flow guide groove. In this process, the flow guide groove of the bipolar plate of the seawater-activated battery will guide the electrolyte to flow in the preset flow guide groove trajectory. Such a design can reduce the generation of turbulence and eddy currents of the electrolyte, so as to reduce the occurrence of uneven distribution of the electrolyte between the positive and negative plates, thereby improving the utilization rate of the positive and negative plates. In addition, the performance evaluation method of the flow guide groove of the bipolar plate of the seawater-activated battery can effectively evaluate the performance of the design of the flow guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative work.

[0055] Figure 1 This is a first position diagram of the guide groove of the bipolar plate of a seawater-activated battery of the present invention;

[0056] Figure 2 A structural diagram of a first guide groove and a second guide groove of a bipolar plate guide groove of a seawater-activated battery according to the present invention;

[0057] Figure 3 A second position diagram of the guide groove of the bipolar plate of a seawater-activated battery of the present invention;

[0058] Figure 4 It is a structural diagram of a first branch flow guide groove and a second branch flow guide groove of a bipolar plate flow guide groove of a seawater-activated battery according to the present invention;

[0059] Figure 5 This is a structural diagram of the second flow channel area and the fourth flow channel area of ​​the guide groove of the bipolar plate of a seawater-activated battery of the present invention;

[0060] Figure 6A position diagram of a first buffer section flow channel groove, a first acceleration section flow channel groove, a second buffer section flow channel groove, and a second acceleration section flow channel groove of a seawater activated battery bipolar plate guide groove of the present invention;

[0061] Figure 7 It is an edge curve diagram of the first branch of the guide groove of the bipolar plate guide groove of a seawater-activated battery of the present invention;

[0062] Figure 8 It is an edge curve diagram of the second branch of the guide groove of the bipolar plate guide groove of a seawater-activated battery of the present invention;

[0063] Fig. 9 The present invention is a schematic flow chart of a method for evaluating the performance of a bipolar plate guide groove of a seawater-activated battery.

[0064] Description of reference numerals:

[0065] 1. The main body of the guide groove of the bipolar plate of the seawater-activated battery; 2. The spoiler groove; 3. The first guide groove; 4. The second guide groove; 5. The liquid inlet; 6. The liquid outlet; 21. The spoiler column; 31. The first branch guide groove; 41. The second branch guide groove; 311. The first flow channel area; 312. The second flow channel area; 313. The edge curve of the first branch guide groove; 3121. The first outer edge acceleration flow channel groove; 3122. The first flow channel groove; 411. The third flow channel area; 412. The fourth flow channel area; 413. The edge curve of the second branch guide groove; 4121. The second outer edge acceleration flow channel groove; 4122. The second flow channel groove; 31211. The first buffer section flow channel groove; 31212. The first acceleration section flow channel groove; 41211. The second buffer section flow channel groove; 41212. The second acceleration section flow channel groove. DETAILED DESCRIPTION

[0066] 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.

[0067] 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.

[0068] 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, such as two, three, etc., 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 directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Embodiment 1

[0070] See also Figures 1 to 6 The present application provides a seawater-activated battery bipolar plate guide groove, including a seawater-activated battery bipolar plate guide groove body 1, a spoiler groove 2, a first guide groove 3 and a second guide groove 4.

[0071] A liquid inlet 5 is provided at one end of the main body 1 of the guide trough of the bipolar plate of the seawater-activated battery, and a liquid outlet 6 is provided at the other end of the main body 1 of the guide trough of the bipolar plate of the seawater-activated battery.

[0072] The spoiler channel 2 is arranged on the main body 1 of the guide channel of the bipolar plate of the seawater-activated battery, and a plurality of spoiler columns 21 are arranged on the spoiler channel 2.

[0073] A plurality of flow-turbulating columns 21 are used to increase the flow velocity of the liquid in the flow-turbulating channel.

[0074] When the battery is operating normally, seawater activates the spoiler groove 2, the first guide groove 3 and the second guide groove 4 on the guide groove of the battery bipolar plate to guide the liquid to flow in the preset grooves, so as to reduce the uneven fluid distribution problem caused by the different momentum of the fluid in each part, so that the fluid can reach the spoiler groove 2 evenly, and then reach the liquid outlet 6 from the spoiler groove 2, thereby improving the flow conduction performance.

[0075] Preferably, the number of the spoiler columns 21 is greater than 4. Exemplarily, the number of the spoiler columns 21 is 81.

[0076] The first guide groove 3 is arranged on the guide groove body 1 of the seawater-activated battery bipolar plate, including a plurality of first branch guide grooves 31, and the plurality of first branch guide grooves 31 are arranged on both sides of the line connecting the center point of the liquid inlet 5 and the center point of the spoiler groove 2; one end of the first branch guide groove 31 is connected to the liquid inlet 5, and the other end is connected to the spoiler groove 2.

[0077] Exemplarily, the first guide groove 31 is in the shape of a deer antler.

[0078] The second guide groove 4 is arranged on the guide groove body 1 of the seawater-activated battery bipolar plate, and includes a plurality of second branch guide grooves 41, and the plurality of second branch guide grooves 41 are arranged on both sides of the line connecting the center point of the liquid outlet 6 and the center point of the spoiler groove 2; one end of the second branch guide groove 41 is connected to the liquid outlet 6, and the other end is connected to the spoiler groove 2.

[0079] Exemplarily, the second guide groove 41 is in the shape of a deer antler.

[0080] The first guide groove 3 is used to guide the liquid to be evenly distributed into the spoiler channel 2; the second guide groove 4 is used to guide the liquid to be evenly distributed to the liquid outlet 6.

[0081] Illustratively, the liquid is seawater.

[0082] In one practicable method, the first branch guide groove 31 includes a first flow channel area 311 and a second flow channel area 312, one end of the first flow channel area 311 is connected to the liquid inlet 5, and the other end is connected to the second flow channel area 312; the end of the second flow channel area 312 away from the first flow channel area 311 is connected to the spoiler channel 2; the connection between the first flow channel area 311 and the second flow channel area 312 is a deflection angle of 30°-65°, which is used to slow down the change in momentum of liquid molecules when the liquid flows from the first flow channel area 311 to the second flow channel area 312, thereby improving energy efficiency performance.

[0083] Preferably, the connection between the first flow channel area 311 and the second flow channel area 312 is at a deflection angle of 40° or 60°.

[0084] In one practicable manner, the second flow channel region 312 includes one first outer edge accelerating flow channel groove 3121 and a plurality of first flow channel grooves 3122; one end of the first outer edge accelerating flow channel groove 3121 and the first flow channel groove 3122 are both connected to the first flow channel region 311, and the other end are both connected to the spoiler channel 2.

[0085] Preferably, the number of the first flow channel grooves 3122 is greater than 3. Exemplarily, the number of the first flow channel grooves 3122 is 6.

[0086] Optionally, the cross-section of the first outer edge accelerating flow channel groove 3121 and the cross-section of the first flow channel groove 3122 are in the shape of a rectangle, a rounded rectangle, a circle or a square.

[0087] In one practicable method, the second branch guide channel 41 includes a third flow channel area 411 and a fourth flow channel area 412, one end of the third flow channel area 411 is connected to the liquid outlet 6, and the other end is connected to the fourth flow channel area 412; the end of the fourth flow channel area 412 away from the third flow channel area 411 is connected to the spoiler channel 2; the connection between the third flow channel area 411 and the fourth flow channel area 412 is a deflection angle of 30°-65°, which is used to slow down the change in momentum of liquid molecules flowing from the fourth flow channel area 412 into the third flow channel area 411, thereby improving energy efficiency performance.

[0088] Preferably, the connection between the third flow channel area 411 and the fourth flow channel area 412 is at a deflection angle of 40° or 60°.

[0089] In one practicable manner, the fourth flow channel area 412 includes one second outer edge accelerating flow channel groove 4121 and a plurality of second flow channel grooves 4122; one end of the second outer edge accelerating flow channel groove 4121 and the second flow channel groove 4122 are both connected to the third flow channel area 411, and the other end are both connected to the spoiler channel 2.

[0090] Preferably, the number of the second flow channel grooves 4122 is greater than 3. Exemplarily, the number of the second flow channel grooves 4122 is 6.

[0091] Optionally, the cross-section of the second outer edge accelerating flow channel groove 4121 and the cross-section of the second flow channel groove 4122 are in the shape of a rectangle, a rounded rectangle, a circle or a square.

[0092] In one practicable manner, the width of the end of the first guide groove 31 connected to the liquid inlet 5 is 2 mm-4 mm; the width of the end of the second guide groove 41 connected to the liquid outlet 6 is 2 mm-4 mm.

[0093] Preferably, the width of the end of the first guide groove 31 connected to the liquid inlet 5 is 3 mm; the width of the end of the second guide groove 41 connected to the liquid outlet 6 is 3 mm.

[0094] The spoiler channel 2 is detachable from the main body 1 of the guide channel of the bipolar plate of the seawater-activated battery; the spoiler channel 2 is rectangular, 100mm-150mm long and 100mm-150mm wide.

[0095] Preferably, the spoiler channel 2 is square, 100 mm long and 100 mm wide.

[0096] One end of the spoiler column 21 is fixedly connected to the bottom surface of the spoiler channel 2, and the other end is in the same horizontal plane as the side of the seawater activated battery bipolar plate guide channel body 1 provided with the spoiler channel 2.

[0097] The intervals between the spoiler columns 21 are 8 mm to 20 mm.

[0098] Preferably, the interval between the spoiler columns 21 is 10 mm or 15 mm.

[0099] Optionally, the spoiler column 21 is cylindrical, elliptical or regular quadrangular; when the spoiler column 21 is cylindrical, the circular diameter of the spoiler column 21 is 2 mm and the height is 0.5 mm.

[0100] The first flow channel area 311 and the third flow channel area 411 are both flow channels with an inclination angle of 30°-60°, which are used to slow down the momentum change of liquid molecules flowing from the liquid inlet 5 into the first flow channel area 311 and the momentum change of liquid molecules flowing from the third flow channel area 411 into the liquid outlet 6, thereby improving energy efficiency performance.

[0101] Preferably, the first flow channel region 311 and the third flow channel region 411 are both flow channels with an inclination angle of 45°.

[0102] The cross-sections of the first outer edge accelerating flow channel groove 3121, the second outer edge accelerating flow channel groove 4121, the first flow channel groove 3122 and the second flow channel groove 4122 are all rectangular, 3mm-5mm long and 0.3mm-0.6mm wide.

[0103] Preferably, the length of the cross section of the first flow channel groove 3122 and the cross section of the second flow channel groove 4122 are 4 mm and 0.5 mm respectively.

[0104] In one implementation, the first outer edge accelerating flow channel groove 3121 and the first flow channel groove 3122 are both gradually expanding, and the gradually expanding width ranges from 1.3mm to 5mm; the interval range between the first outer edge accelerating flow channel groove 3121 and the first flow channel groove 3122 closest to the first outer edge accelerating flow channel groove 3121 is 1.5mm to 4mm, and the interval range between the first flow channel grooves 3122 is 1.5mm to 4mm.

[0105] Exemplarily, the first outer edge accelerating flow channel groove 3121 and the first flow channel groove 3122 have a width of 1.3 mm at their narrowest parts and a width of 5 mm at their widest parts.

[0106] The first outer edge accelerating channel groove 3121 includes a first buffer section channel groove 31211 and a first accelerating section channel groove 31212 ; the length ratio of the first buffer section channel groove 31211 to the first accelerating section channel groove 31212 is 4:1, which is used to accelerate the liquid and guide the liquid to flow vertically into the spoiler channel 2 .

[0107] The second outer edge accelerating flow channel groove 4121 and the second flow channel groove 4122 are both gradually expanding, and the gradually expanding width ranges from 1.3mm to 5mm; the interval range between the second outer edge accelerating flow channel groove 4121 and the second flow channel groove 4122 closest to the second outer edge accelerating flow channel groove 4121 is 1.5mm to 4mm, and the interval range between the second flow channel grooves 4122 is 1.5mm to 4mm.

[0108] Exemplarily, the width of the second outer edge accelerating flow channel groove 4121 and the second flow channel groove 4122 at the narrow part is 1.3 mm, and the width of the wide part is 5 mm.

[0109] The second outer edge accelerating flow channel groove 4121 includes a second buffer section flow channel groove 41211 and a second accelerating section flow channel groove 41212; the length ratio of the second buffer section flow channel groove 41211 to the second accelerating section flow channel groove 41212 is 4:1, which is used to accelerate the liquid and guide the liquid to flow vertically from the spoiler channel 2 into the second guide groove 4.

[0110] In one practicable manner, the edge curve parameter of the first branch guide groove 31 is y.

[0111] The expression of y is:

[0112]

[0113] Wherein, y is the edge curve parameter of the first branch guide groove 31, G is the first length, h is the second length, D is the third length, and x is m is the first proportional coefficient, y0 is the first fitting coefficient, A1 and A2 are the second fitting coefficient and the third fitting coefficient, t1 and t2 are the fourth fitting coefficient and the fifth fitting coefficient.

[0114] It should be noted that Figure 7 is the edge curve diagram of the first guide groove 31. The parameters G, h, D, and x are specifically represented by Figure 7 The corresponding parameter marks in the figure are as follows: G is the height from the boundary of the liquid inlet 5 to the boundary of the spoiler channel 2; h is the distance from the edge curve at 40 mm to the right of the y axis in the figure to the x axis; D is 40 mm; x is the length of the first segment; x m is the ratio of the length of the first segment to the sum of the lengths of the first and second segments, y0 is 39198.4622±603749.83034, A1 is 0.09035±0.01627, A2 is -39189.90205±603749.83031, t1 is -2.28161±0.08066, and t2 is -283018.47173±4360324.58886.

[0115] In one implementation, the edge curve parameter of the second branch guide groove 41 is s;

[0116] The expression of s is:

[0117]

[0118] Wherein, s is the edge curve parameter of the second branch guide groove 41, E is the fourth length, f is the fifth length, P is the sixth length, z m is the second proportional coefficient, s0 is the sixth fitting coefficient, B1 and B2 are the seventh fitting coefficient and the eighth fitting coefficient, t3 and t4 are the ninth fitting coefficient and the tenth fitting coefficient.

[0119] It should be noted that Figure 8 is the edge curve diagram of the second branch guide groove 41. The parameters E, f, P, and z are specifically represented by Figure 8 The corresponding parameter marks in the figure are as follows: E is the height from the boundary of the liquid outlet 6 to the boundary of the spoiler channel 2; f is the distance from the edge curve at 40 mm to the right of the y axis in the figure to the x axis; P is 40 mm; z is the length of the first segment; z m is the ratio of the length of the first segment to the sum of the lengths of the first and second segments, s0 is 39198.4622±603749.83034, B1 is 0.09035±0.01627, B2 is -39189.90205±603749.83031, t3 is -2.28161±0.08066, and t4 is -283018.47173±4360324.58886.

[0120] Embodiment 2

[0121] See also Fig. 9 , a method for evaluating the performance of a bipolar plate guide groove of a seawater-activated battery, the method comprising:

[0122] S1, obtaining characteristic linear velocity value information, area information and time information; the characteristic linear velocity value information includes the maximum value, the minimum value and the velocity value sequence; the area information includes the gas phase area and the plate area; the time information includes the first time information, the second time information and the third time information;

[0123] It should be noted that the characteristic line velocity value information includes a maximum value, a minimum value and a flow velocity value sequence. Several horizontal characteristic lines and several vertical characteristic lines are set on the spoiler channel. Then, in the process of liquid flowing from the liquid inlet to the liquid outlet, the flow velocity is continuously collected on the above-mentioned characteristic lines to obtain a flow velocity value sequence, and the maximum and minimum values ​​of the flow velocity are obtained through calculation and processing of the flow velocity value sequence.

[0124] It should be noted that the gas phase area refers to the area occupied by the gas in the guiding flow channel, and the plate area refers to the total area of ​​the guiding flow channel.

[0125] It should be noted that the time information refers to dividing the change of the liquid level with time t after the liquid enters the turbulent channel from the liquid inlet into three time periods, namely Rapid 1 period, Stabile period and Rapid 2 period.

[0126] S2, using the first guide groove model, calculating the maximum value, the minimum value and the flow velocity value sequence to obtain the flow velocity information of the guide groove; the guide groove includes a spoiler groove, a first guide groove and a second guide groove;

[0127] Among them, the first diversion channel model is:

[0128]

[0129] In the formula, LS is the flow velocity information of the diversion trough, CS is the first correction parameter, ZD is the maximum value, ZX is the minimum value, and PJ is the flow velocity value sequence;

[0130] It should be noted that the first correction parameter may be set by the user or obtained based on historical data.

[0131] It should be noted that the spoiler groove, the first guide groove and the second guide groove are the spoiler groove, the first guide groove and the second guide groove in the first embodiment.

[0132] S3, using the second flow channel model, calculating the gas phase area and the plate area to obtain the proportion information of the flow channel;

[0133] Among them, the second diversion channel model is:

[0134]

[0135] In the formula, AGR is the proportion of the guide groove, CSS is the second correction parameter, AG is the gas phase area, and AT is the plate area;

[0136] It should be noted that the second correction parameter can be set by the user or obtained based on historical data.

[0137] S4, using the third diversion channel model, calculating the first time information, the second time information and the third time information to obtain the flow velocity time information of the diversion channel;

[0138] Among them, the third diversion channel model is:

[0139] T = U1*T1+U2*T2+U3*T3;

[0140] Wherein, T is the flow velocity time information of the diversion groove, T1 is the first time information, T2 is the second time information, T3 is the third time information, U1 is the third correction parameter, U2 is the fourth correction parameter, and U3 is the fifth correction parameter;

[0141] It should be noted that the third correction parameter, the fourth correction parameter and the fifth correction parameter may be set by the user or obtained based on historical data.

[0142] S5, performing performance evaluation calculation on the guide groove of the bipolar plate of the seawater activated battery according to the flow velocity information, proportion information and flow velocity time information of the guide groove, and obtaining performance evaluation result information of the guide groove of the bipolar plate of the seawater activated battery;

[0143] Among them, the expression for performance evaluation calculation is:

[0144] XNPJ = α*LS + β*AGR + γ*T;

[0145] Where XNPJ is the performance evaluation result information, α is the first correction factor, β is the second correction factor, γ is the third correction factor, LS is the flow rate information, AGR is the proportion information, and T is the flow rate time information.

[0146] It should be noted that the first correction factor, the second correction factor and the third correction factor can be set by the user or obtained based on historical data, and are used to adjust the weights between the flow rate information, the proportion information and the flow rate time information.

[0147] In the above embodiments, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0148] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0149] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0150] 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 method for evaluating the performance of bipolar plate guide grooves of seawater-activated batteries, characterized in that: Applicable to the bipolar plate guide groove of the seawater-activated battery, the bipolar plate guide groove of the seawater-activated battery comprises a bipolar plate guide groove body and a guide groove; The guide groove comprises a spoiler groove, a first guide groove and a second guide groove; One end of the main body of the bipolar plate guide groove of the seawater activated battery is provided with a liquid inlet, and the other end of the main body of the bipolar plate guide groove of the seawater activated battery is provided with a liquid outlet; The spoiler channel is arranged on the main body of the guide groove of the bipolar plate of the seawater activated battery; the first guide groove is arranged on the main body of the guide groove of the bipolar plate of the seawater activated battery; the second guide groove is arranged on the main body of the guide groove of the bipolar plate of the seawater activated battery; The first guide groove is used to guide the liquid to be evenly distributed into the spoiler channel; The second guide groove is used to guide the liquid to be evenly distributed to the liquid outlet; The method comprises: S1, obtaining characteristic line velocity value information, area information and time information; the characteristic line velocity value information includes a maximum value, a minimum value and a flow rate value sequence, a plurality of horizontal characteristic lines and a plurality of longitudinal characteristic lines are set on the spoiler channel, the flow rate is continuously collected on the plurality of characteristic lines to obtain the flow rate value sequence, and the maximum value and the minimum value are obtained by calculating and processing the flow rate value sequence; the area information includes a gas phase area and a plate area, the gas phase area refers to the area occupied by the gas in the guide groove, and the plate area refers to the total area of ​​the guide groove; the time information includes a first time information, a second time information and a third time information; the first time information, the second time information and the third time information are respectively the time information of the Rapid 1 period, the time information of the Stable period and the time information of the Rapid 2 period of the change of the liquid level height with time t after the liquid enters the spoiler channel from the liquid inlet; S2, using the first diversion channel model, calculating the maximum value, the minimum value and the flow rate value sequence to obtain flow rate information of the diversion channel; Wherein, the first guide channel model is: Wherein, LS is the flow velocity information of the guide groove, CS is the first correction parameter, ZD is the maximum value, ZX is the minimum value, and PJ is the flow velocity value sequence; S3, using the second flow guide groove model, calculating the gas phase area and the electrode plate area to obtain the proportion information of the flow guide groove; Wherein, the second guide channel model is: Wherein, AGR is the proportion information of the guide groove, CSS is the second correction parameter, AG is the gas phase area, and AT is the plate area; S4, using a third guide channel model, calculating the first time information, the second time information and the third time information to obtain flow velocity time information of the guide channel; Wherein, the third guide channel model is: T = U1*T1+U2*T2+U3*T3; Wherein, T is the flow velocity time information of the guide groove, T1 is the first time information, T2 is the second time information, T3 is the third time information, U1 is the third correction parameter, U2 is the fourth correction parameter, and U3 is the fifth correction parameter; S5, performing performance evaluation calculation on the guide groove of the seawater-activated battery bipolar plate according to the flow velocity information, the proportion information and the flow velocity time information of the guide groove, and obtaining performance evaluation result information of the guide groove of the seawater-activated battery bipolar plate; Among them, the expression for performance evaluation calculation is: XNPJ = α*LS + β*AGR + γ*T; In the formula, XNPJ is the performance evaluation result information, α is the first correction factor, β is the second correction factor, γ is the third correction factor, LS is the flow rate information, AGR is the proportion information, and T is the flow rate time information.

2. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 1, characterized in that: A plurality of spoiler columns are arranged on the spoiler channel; The first guide groove includes a plurality of first branch guide grooves, and the plurality of first branch guide grooves are arranged on both sides of a line connecting the center point of the liquid inlet and the center point of the spoiler groove; one end of the first branch guide groove is connected to the liquid inlet, and the other end is connected to the spoiler groove; The second guide groove includes a plurality of second branch guide grooves, and the plurality of second branch guide grooves are arranged on both sides of a line connecting the center point of the liquid outlet and the center point of the spoiler groove; one end of the second branch guide groove is connected to the liquid outlet, and the other end is connected to the spoiler groove.

3. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 2, characterized in that: The first branch guide groove includes a first flow channel area and a second flow channel area. One end of the first flow channel area is connected to the liquid inlet, and the other end is connected to the second flow channel area; the end of the second flow channel area away from the first flow channel area is connected to the spoiler channel; the connection between the first flow channel area and the second flow channel area is a deflection angle of 30°-65°.

4. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 3, characterized in that: The second flow channel area includes a first outer edge acceleration flow channel groove and a plurality of first flow channel grooves; one end of the first outer edge acceleration flow channel groove and the first flow channel groove are both connected to the first flow channel area, and the other end is connected to the spoiler channel.

5. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 4, characterized in that: The second branch guide groove includes a third flow channel area and a fourth flow channel area, one end of the third flow channel area is connected to the liquid outlet, and the other end is connected to the fourth flow channel area; the end of the fourth flow channel area away from the third flow channel area is connected to the spoiler channel; the connection between the third flow channel area and the fourth flow channel area is a deflection angle of 30°-65°.

6. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 5, characterized in that: The fourth flow channel area includes one second outer edge acceleration flow channel groove and a plurality of second flow channel grooves; one end of the second outer edge acceleration flow channel groove and the second flow channel groove are both connected to the third flow channel area, and the other end is connected to the spoiler channel.

7. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 6, characterized in that: The width of the end of the first branch guide groove connected to the liquid inlet is 2mm-4mm; the width of the end of the second branch guide groove connected to the liquid outlet is 2mm-4mm; The spoiler channel is detachable from the main body of the seawater activated battery bipolar plate guide channel; the spoiler channel is rectangular, 100mm-150mm long and 100mm-150mm wide; One end of the spoiler column is fixedly connected to the bottom surface of the spoiler channel, and the other end is in the same horizontal plane as the side of the seawater activated battery bipolar plate guide channel body provided with the spoiler channel; The intervals between the plurality of spoiler columns are 8mm-20mm; The first flow channel area and the third flow channel area are both flow channels with an inclination angle of 30°-60°; The cross-section of the first outer edge accelerating flow channel groove, the cross-section of the second outer edge accelerating flow channel groove, the cross-section of the first flow channel groove and the cross-section of the second flow channel groove are all rectangular, with a length of 3mm-5mm and a width of 0.3mm-0.6mm.

8. The method for evaluating the performance of the bipolar plate guide groove of the seawater activated battery according to claim 6, characterized in that: The first outer edge accelerating flow channel groove and the first flow channel groove are both gradually expanding, and the gradually expanding width ranges from 1.3 mm to 5 mm; the interval range between the first outer edge accelerating flow channel groove and the first flow channel groove closest to the first outer edge accelerating flow channel groove is 1.5 mm to 4 mm, and the interval range between the first flow channel grooves is 1.5 mm to 4 mm; The first outer edge accelerating channel groove comprises a first buffer section channel groove and a first accelerating section channel groove; the length ratio of the first buffer section channel groove to the first accelerating section channel groove is 4:1; The second outer edge accelerating flow channel groove and the second flow channel groove are both gradually expanding, and the gradually expanding width ranges from 1.3 mm to 5 mm; the interval range between the second outer edge accelerating flow channel groove and the second flow channel groove closest to the second outer edge accelerating flow channel groove is 1.5 mm to 4 mm, and the interval range between the second flow channel grooves is 1.5 mm to 4 mm; The second outer edge acceleration flow channel groove includes a second buffer section flow channel groove and a second acceleration section flow channel groove; the length ratio of the second buffer section flow channel groove to the second acceleration section flow channel groove is 4:

1.

9. The method for evaluating the performance of bipolar plate guide grooves of seawater-activated batteries according to claim 2, characterized in that: The edge curve parameter of the first diversion channel is y; Wherein, the expression of y is: Wherein, y is the edge curve parameter of the first branch guide groove, G is the first length, h is the second length, D is the third length, and x is m is the first proportional coefficient, y0 is the first fitting coefficient, A1 and A2 are the second fitting coefficient and the third fitting coefficient, t1 and t2 are the fourth fitting coefficient and the fifth fitting coefficient, the first length is the height from the boundary of the liquid inlet to the boundary of the spoiler channel, the second length is the distance from the edge curve 40mm to the right of the y-axis to the x-axis, the third length is 40mm, and the first proportional coefficient is the ratio of the length of the first section to the sum of the lengths of the first section and the second section.

10. The method for evaluating the performance of bipolar plate guide grooves of seawater-activated batteries according to claim 2, characterized in that: The edge curve parameter of the second diversion trough is s; Wherein, the expression of s is: Where, s is the edge curve parameter of the second branch guide groove, E is the fourth length, f is the fifth length, P is the sixth length, z m is the second proportional coefficient, s0 is the sixth fitting coefficient, B1 and B2 are the seventh fitting coefficient and the eighth fitting coefficient, t3 and t4 are the ninth fitting coefficient and the tenth fitting coefficient, the fourth length is the height from the boundary of the liquid outlet to the boundary of the spoiler channel, the fifth length is the distance from the edge curve 40 mm to the right of the y-axis to the x-axis, the sixth length is 40 mm, and the second proportional coefficient is the ratio of the length of the first section to the sum of the lengths of the first section and the second section.

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