Seawater activated battery monomer structure and performance evaluation method

Abstract

The invention discloses a seawater activated battery monomer structure and a performance evaluation method. The seawater activated battery monomer structure comprises a current collecting column, a first sealing cover, a second sealing cover, a current collecting plate, a negative plate, an electrode frame, a copper net and a positive plate, a first through hole is formed in the middle of the electrode frame, and the edge of the negative plate is attached to the edge of the first through hole; a liquid inlet and a liquid outlet are correspondingly formed in the electrode frame; a plurality of turbulent flow columns are arranged on the negative plate; the electrode frame is provided with a first diversion trench and a second diversion trench; one end of the first diversion trench is communicated with a liquid inlet of the electrode frame, and the other end of the first diversion trench is communicated with the negative plate; one end of the second diversion trench is communicated with the liquid outlet of the electrode frame, and the other end of the second diversion trench is communicated with the negative plate. In the seawater activated battery, turbulent flow and vortex of seawater can be reduced, so that the phenomenon of non-uniform distribution of seawater between polar plates is reduced, and the utilization rate of positive and negative polar plates is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a seawater-activated battery monomer structure 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 bipolar plate flow guide structure in the existing seawater-activated battery monomer 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 energy 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 single-cell structure of seawater-activated batteries is an effective research method to further improve battery performance, and the current design methods for single-cell structures of seawater-activated batteries are still insufficient.

[0005] Therefore, how to provide a seawater-activated battery monomer structure 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 seawater-activated battery monomer structure and a performance evaluation method. The seawater-activated battery monomer structure can not only minimize the momentum conversion of seawater 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 through the design of the negative electrode plate and the electrode frame, but also enable the seawater to flow into the negative electrode plate and the liquid outlet 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 seawater and further improve the uniformity of seawater distribution. Therefore, the present invention has a strong practical guiding significance for the design of seawater-activated battery monomer structures. The specific contents are as follows:

[0007] The present invention provides a seawater activated battery monomer structure, comprising a current collecting column, a first sealing cover, a second sealing cover, a current collecting plate, a negative electrode plate, an electrode frame, a copper mesh and a positive electrode plate;

[0008] Adjacent surfaces of the first sealing cover and the second sealing cover are both provided with grooves;

[0009] There are two current collecting plates, which are respectively correspondingly attached to the groove of the first sealing cover and the groove of the second sealing cover;

[0010] The positive electrode plate and the copper mesh are stacked on the current collecting plate attached to the second sealing cover;

[0011] The negative electrode plate is attached to the current collecting plate attached to the first sealing cover;

[0012] A first through hole is provided in the middle of the electrode frame, and the edge of the negative electrode plate is in contact with the edge of the first through hole so that the negative electrode plate covers the first through hole;

[0013] The surface of the first sealing cover provided with the groove and the surface of the second sealing cover provided with the groove are both attached to the electrode frame;

[0014] The groove depth of the first sealing cover is the same as the thickness of the current collecting plate;

[0015] The groove depth of the second sealing cover is the same as the superposition thickness of the current collecting plate, the positive electrode plate and the copper mesh;

[0016] The frame body opposite to the electrode frame is provided with a liquid inlet and a liquid outlet correspondingly, and the second sealing cover is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet of the electrode frame overlap with the liquid inlet and the liquid outlet of the second sealing cover, so as to allow seawater to enter and exit the electrode frame;

[0017] A second through hole is provided at the center of the first sealing cover, a third through hole is provided at the center of the second sealing cover, and the number of the current collecting posts is 2, one is provided on the second through hole, and the other is provided on the third through hole; wherein,

[0018] A plurality of spoiler columns are arranged on the negative electrode plate;

[0019] The electrode frame is provided with a first guide groove and a second guide groove; one end of the first guide groove is connected to the liquid inlet of the electrode frame, and the other end is connected to the negative electrode plate; one end of the second guide groove is connected to the liquid outlet of the electrode frame, and the other end is connected to the negative electrode plate;

[0020] The first guide groove is used to guide the seawater to be evenly distributed into the negative electrode plate; the second guide groove is used to guide the seawater to be evenly distributed to the liquid outlet of the electrode frame.

[0021] In some operative methods, 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 a center point of the liquid inlet of the electrode frame and a center point of the first through hole; one end of the first branch guide groove is connected to the liquid inlet of the electrode frame, and the other end is connected to the negative electrode plate.

[0022] The first branch flow 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 of the electrode frame, 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 negative electrode plate; the connection between the first flow channel area and the second flow channel area is a deflection angle of 30°-65°.

[0023] In some embodied embodiments, the second flow channel region includes one first outer edge accelerating flow channel groove and a plurality of first flow channel grooves; one end of the first outer edge accelerating 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 negative electrode plate.

[0024] In some operative methods, 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 a center point of the liquid outlet of the electrode frame and a center point of the first through hole; one end of the second branch guide groove is connected to the liquid outlet of the electrode frame, and the other end is connected to the negative electrode plate.

[0025] 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 of the electrode frame, 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 negative electrode plate; the connection between the third flow channel area and the fourth flow channel area is a deflection angle of 30°-65°.

[0026] In some embodied embodiments, the fourth flow channel region includes one second outer edge acceleration flow channel groove and multiple 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 region, and the other end are both connected to the negative electrode plate.

[0027] In some practicable embodiments, the width of one end of the first branch flow guide groove connected to the liquid inlet of the electrode frame is 2 mm-4 mm; the width of one end of the second branch flow guide groove connected to the liquid outlet of the electrode frame is 2 mm-4 mm;

[0028] The negative electrode plate is rectangular, with a length of 100mm-150mm and a width of 100mm-150mm;

[0029] One end of the spoiler column is fixedly connected to the bottom surface of the negative electrode plate, and the other end is in the same horizontal plane as the surface of the electrode frame on which the negative electrode plate is arranged;

[0030] The intervals between the plurality of spoiler columns are 8mm-20mm;

[0031] The first flow channel area and the third flow channel area are both flow channels with an inclination angle of 30°-60°;

[0032] 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.

[0033] 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;

[0034] 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;

[0035] 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;

[0036] 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.

[0037] In some practicable embodiments, the edge curve parameter of the first branch guide groove is y;

[0038] Wherein, the expression of y is:

[0039]

[0040] 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.

[0041] In some practicable embodiments, the edge curve parameter of the second branch guide groove is s;

[0042] Wherein, the expression of s is:

[0043]

[0044] 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.

[0045] The present invention also provides a method for evaluating the performance of a seawater-activated battery monomer structure, which is applied to the above-mentioned seawater-activated battery monomer structure, and the method comprises:

[0046] S1, obtaining negative plate velocity value information, negative plate area information and negative plate time information; the negative plate velocity value information includes a maximum value, a minimum value and a flow rate value sequence; the negative plate area information includes a negative plate gas phase area and a negative plate area; the negative plate time information includes first time information, second time information and third time information;

[0047] S2, using the first battery structure model, calculating the maximum value, the minimum value and the flow rate value sequence to obtain flow rate information of the seawater activated battery monomer structure;

[0048] Wherein, the first battery structure model is:

[0049]

[0050] Wherein, DCSC is the flow rate information, DY is the first correction parameter, MA is the maximum value, MI is the minimum value, and XL is the flow rate value sequence;

[0051] S3, using the second battery structure model, calculating the gas phase area of ​​the negative electrode plate and the electrode area of ​​the negative electrode plate to obtain the proportion information of the seawater activated battery monomer structure;

[0052] Wherein, the second battery structure model is:

[0053]

[0054] Wherein, ZB is the proportion information, DE is the second correction parameter, QX is the gas phase area of ​​the negative electrode plate, and JB is the plate area of ​​the negative electrode plate;

[0055] S4, using a third battery structure model, calculating the first time information, the second time information and the third time information to obtain flow rate time information of the seawater activated battery monomer structure;

[0056] Wherein, the third battery structure model is:

[0057] T = U1*T1+U2*T2+U3*T3;

[0058] Wherein, T is the flow velocity time information, 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;

[0059] S5, performing a performance evaluation calculation on the seawater-activated battery monomer structure according to the flow rate information, the proportion information and the flow rate time information of the seawater-activated battery monomer structure to obtain a performance evaluation result of the seawater-activated battery monomer structure;

[0060] Among them, the expression for performance evaluation calculation is:

[0061] DCJG=a1*DCSC+a2*ZB+a3*T;

[0062] In the formula, DCJG is the performance evaluation result, a1 is the first correction factor, a2 is the second correction factor, a3 is the third correction factor, DCSC is the flow rate information, ZB is the proportion information, and T is the flow rate time information.

[0063] The beneficial effect of the present invention is that a first guide groove and a second guide groove are provided on the electrode frame and a plurality of spoiler columns are provided on the negative plate to form a guide groove, which is used to guide the seawater to move along the trajectory of the guide groove. In this process, the electrode frame will guide the seawater to flow in the preset guide groove trajectory. Such a design can reduce the generation of turbulence and eddy currents in the seawater, so as to reduce the occurrence of uneven distribution of seawater between the plates, thereby improving the utilization rate of the positive and negative plates. In addition, through the performance evaluation method of the seawater-activated battery, the design of the negative plate and the electrode frame in the battery can be effectively evaluated, thereby providing a performance evaluation basis for the battery structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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.

[0065] Figure 1 This is a structural diagram of a seawater activated battery monomer structure of the present invention;

[0066] Figure 2 A disassembled position diagram of a negative plate and an electrode frame of a seawater-activated battery cell structure of the present invention;

[0067] Figure 3 A combined position diagram of a negative electrode plate and an electrode frame of a seawater-activated battery cell structure of the present invention;

[0068] Figure 4 A structural diagram of a first guide groove and a second guide groove of a seawater-activated battery cell structure of the present invention;

[0069] Figure 5 It is a structural diagram of a first branch guide groove and a second branch guide groove of a seawater activated battery monomer structure of the present invention;

[0070] Figure 6 It is a structural diagram of the second flow channel area and the fourth flow channel area of ​​a seawater-activated battery monomer structure of the present invention;

[0071] Figure 7 A 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 single body structure of the present invention;

[0072] Figure 8 It is an edge curve diagram of a first guide groove of a seawater-activated battery cell structure of the present invention;

[0073] Fig. 9It is an edge curve diagram of the second branch guide groove of a seawater activated battery single body structure of the present invention;

[0074] Fig.10 It is a schematic flow chart of a method for evaluating the structural performance of a seawater-activated battery cell according to the present invention.

[0075] Description of reference numerals:

[0076] 1. nut; 2. bolt; 3. current collecting column; 4. first sealing cover; 5. second sealing cover; 6. current collecting plate; 7. negative plate; 8. electrode frame; 9. copper mesh; 10. positive plate; 11. screw hole; 12. groove; 41. second through hole; 51. third through hole; 71. spoiler column; 81. first through hole; 82. liquid inlet; 83. liquid outlet; 84. first guide groove; 841. first branch guide groove; 8411. first flow channel area; 8412. second flow channel area; 84121. first outer edge acceleration flow channel groove; 8 41211, the first buffer section flow channel; 841212, the first acceleration section flow channel; 84122, the first flow channel; 8413, the edge curve of the first branch guide channel; 85, the second guide channel; 851, the second branch guide channel; 8511, the third flow channel area; 8512, the fourth flow channel area; 851211, the second buffer section flow channel; 851212, the second acceleration section flow channel; 8513, the edge curve of the second branch guide channel; 85121, the second outer edge acceleration flow channel; 85122, the second flow channel. DETAILED DESCRIPTION

[0077] 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 invention, not 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.

[0078] 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.

[0079] 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.

[0080] Embodiment 1

[0081] See also Figures 1 to 7 The present application provides a seawater-activated battery cell structure, including: a current collecting column 3, a first sealing cover 4, a second sealing cover 5, a current collecting plate 6, a negative electrode plate 7, an electrode frame 8, a copper mesh 9 and a positive electrode plate 10.

[0082] Adjacent surfaces of the first sealing cover 4 and the second sealing cover 5 are both provided with grooves 12 .

[0083] There are two current collecting plates 6 , which are respectively correspondingly attached to the groove 12 of the first sealing cover 4 and the groove 12 of the second sealing cover 5 .

[0084] The positive electrode plate 10 and the copper mesh 9 are stacked on the current collecting plate 6 attached to the second sealing cover 5 .

[0085] The negative electrode plate 7 is attached to the current collecting plate 6 attached to the first sealing cover 4 .

[0086] A first through hole 81 is provided in the middle of the electrode frame 8 , and the edge of the negative electrode plate 7 is in contact with the edge of the first through hole 81 , so that the negative electrode plate 7 covers the first through hole 81 .

[0087] The surface of the first sealing cover 4 provided with the groove 12 and the surface of the second sealing cover 5 provided with the groove 12 are both attached to the electrode frame 8 .

[0088] The depth of the groove of the first sealing cover 4 is the same as the thickness of the current collecting plate 6 .

[0089] The depth of the groove of the second sealing cover 5 is the same as the thickness of the current collecting plate 6 , the positive electrode plate 10 and the copper mesh 9 stacked together.

[0090] The electrode frame 8 has a liquid inlet 82 and a liquid outlet 83 on its opposite frame body. The second sealing cover 5 has a liquid inlet and a liquid outlet. The liquid inlet 82 and liquid outlet 83 of the electrode frame overlap with the liquid inlet and liquid outlet of the second sealing cover for seawater to enter and exit the electrode frame 8.

[0091] A plurality of screw holes 11 are provided on the first sealing cover 4, the electrode frame 8 and the second sealing cover 5. The nut 1 penetrates through the first sealing cover 4, the electrode frame 8 and the second sealing cover 5 and cooperates with the bolt 2 to fix the battery.

[0092] A second through hole 41 is provided at the center of the first sealing cover 4, a third through hole 51 is provided at the center of the second sealing cover 5, and there are two current collecting posts 3, one is provided on the second through hole 41, and the other is provided on the third through hole 51; wherein,

[0093] A plurality of spoiler columns 71 are arranged on the negative electrode plate 7 .

[0094] A plurality of spoiler columns 71 are used to increase the flow rate of seawater in the negative plate.

[0095] The electrode frame 8 is provided with a first guide groove 84 and a second guide groove 85; one end of the first guide groove 84 is connected to the liquid inlet 82 of the electrode frame 8, and the other end is connected to the negative electrode plate 7; one end of the second guide groove 85 is connected to the liquid outlet 83 of the electrode frame 8, and the other end is connected to the negative electrode plate 7.

[0096] When the battery is in normal operation, the first guide groove 84 and the second guide groove 85 cooperate with the negative plate 7 to guide the seawater to flow in a preset path to reduce the uneven fluid distribution problem caused by the different momentum of different parts of the seawater, so that the seawater can reach the negative plate 7 evenly, and then reach the liquid outlet 83 of the electrode frame 8 from the negative plate 7, thereby improving the conduction performance.

[0097] Preferably, the number of the spoiler columns 71 is greater than 6. Exemplarily, the number of the spoiler columns 71 is 81.

[0098] The first guide groove 84 is used to guide the seawater to be evenly distributed into the negative electrode plate 7 ; the second guide groove 85 is used to guide the seawater to be evenly distributed to the liquid outlet 83 of the electrode frame 8 .

[0099] In one implementation, the first guide groove 84 includes a plurality of first branch guide grooves 841, and the plurality of first branch guide grooves 841 are arranged on both sides of a line connecting the center point of the liquid inlet 82 of the electrode frame 8 and the center point of the first through hole 81; one end of the first branch guide groove 841 is connected to the liquid inlet 82 of the electrode frame 8, and the other end is connected to the negative electrode plate 7.

[0100] The first branch flow guide groove 841 includes a first flow channel area 8411 and a second flow channel area 8412. One end of the first flow channel area 8411 is connected to the liquid inlet 82 of the electrode frame 8, and the other end is connected to the second flow channel area 8412; the end of the second flow channel area 8412 away from the first flow channel area 8411 is connected to the negative electrode plate 7; the connection between the first flow channel area 8411 and the second flow channel area 8412 is a deflection angle of 30°-65°, which is used to slow down the momentum change of seawater molecules when seawater flows from the first flow channel area 8411 to the second flow channel area 8412, thereby improving energy efficiency performance.

[0101] Exemplarily, the first guide groove 841 is in the shape of a deer antler.

[0102] Preferably, the connection between the first flow channel area 8411 and the second flow channel area 8412 is at a deflection angle of 40° or 60°.

[0103] In one implementation, the second flow channel region 8412 includes one first outer edge accelerating flow channel groove 84121 and a plurality of first flow channel grooves 84122; one end of the first outer edge accelerating flow channel groove 84121 and the first flow channel groove 84122 are both connected to the first flow channel region 8411, and the other end is connected to the negative electrode plate 7.

[0104] Preferably, the number of the first flow channel grooves 84122 is greater than 3. Exemplarily, the number of the first flow channel grooves 84122 is 6.

[0105] Optionally, the cross-section of the first outer edge accelerating flow channel groove 84121 and the cross-section of the first flow channel groove 84122 are rectangular, rounded rectangular, circular or square.

[0106] In one implementation, the second guide groove 85 includes a plurality of second branch guide grooves 851, and the plurality of second branch guide grooves 851 are arranged on both sides of the line connecting the center point of the liquid outlet 83 of the electrode frame 8 and the center point of the first through hole 81; one end of the second branch guide groove 851 is connected to the liquid outlet 83 of the electrode frame 8, and the other end is connected to the negative electrode plate 7.

[0107] The second branch guide groove 851 includes a third flow channel area 8511 and a fourth flow channel area 8512. One end of the third flow channel area 8511 is connected to the liquid outlet 83 of the electrode frame 8, and the other end is connected to the fourth flow channel area 8512; the end of the fourth flow channel area 8512 away from the third flow channel area 8511 is connected to the negative electrode plate 7; the connection between the third flow channel area 8511 and the fourth flow channel area 8512 is a deflection angle of 30°-65°, which is used to slow down the momentum change of seawater molecules flowing from the fourth flow channel area 8512 into the third flow channel area 8511, thereby improving energy efficiency performance.

[0108] Preferably, the connection between the third flow channel area 8511 and the fourth flow channel area 8512 is at a deflection angle of 40° or 60°.

[0109] Exemplarily, the second guide groove 851 is in the shape of a deer antler.

[0110] In one implementation, the fourth flow channel region 8512 includes one second outer edge accelerating flow channel groove 85121 and a plurality of second flow channel grooves 85122; one end of the second outer edge accelerating flow channel groove 85121 and the second flow channel groove 85122 are both connected to the third flow channel region 8511, and the other end is connected to the negative electrode plate 7.

[0111] Preferably, the number of the second flow channel grooves 85122 is greater than 3. Exemplarily, the number of the second flow channel grooves 85122 is 6.

[0112] Optionally, the cross-section of the second outer edge accelerating flow channel groove 85 and the cross-section of the second flow channel groove 85122 are rectangular, rounded rectangular, circular or square.

[0113] In one practicable manner, the width of the end of the first guide groove 841 connected to the liquid inlet 82 of the electrode frame 8 is 2mm-4mm; the width of the end of the second guide groove 851 connected to the liquid outlet 83 of the electrode frame 8 is 2mm-4mm.

[0114] Preferably, the width of one end of the first guide groove 841 connected to the liquid inlet 82 of the electrode frame 8 is 3 mm; the width of one end of the second guide groove 851 connected to the liquid outlet 83 of the electrode frame 8 is 3 mm.

[0115] The negative electrode plate 7 is rectangular, with a length of 100 mm to 150 mm and a width of 100 mm to 150 mm.

[0116] Preferably, the negative electrode plate 7 is square, with a length of 100 mm and a width of 100 mm.

[0117] One end of the spoiler column 71 is fixedly connected to the bottom surface of the negative electrode plate 7 , and the other end is in the same horizontal plane as the surface of the electrode frame 8 on which the negative electrode plate 7 is disposed.

[0118] The intervals between the spoiler columns 71 are 8 mm to 20 mm.

[0119] Preferably, the intervals between the spoiler columns 71 are 10 mm or 15 mm.

[0120] Optionally, the spoiler column 71 is cylindrical, elliptical or regular quadrangular; when the spoiler column 71 is cylindrical, the circular diameter of the spoiler column 71 is 2 mm and the height is 0.5 mm.

[0121] The first flow channel area 8411 and the third flow channel area 8511 are both flow channels with an inclination angle of 30°-60°, which are used to slow down the momentum change of seawater molecules flowing from the liquid inlet 82 of the electrode frame 8 into the first flow channel area 8411 and the momentum change of seawater molecules flowing from the third flow channel area 8511 into the liquid outlet 83 of the electrode frame 8, thereby improving energy efficiency performance.

[0122] Preferably, the first flow channel region 8411 and the third flow channel region 8511 are both flow channels with an inclination angle of 45°.

[0123] The cross-sections of the first outer edge accelerating flow channel groove 84121, the second outer edge accelerating flow channel groove 85121, the first flow channel groove 84122 and the second flow channel groove 85122 are all rectangular, 3mm-5mm long and 0.3mm-0.6mm wide.

[0124] Preferably, the length of the cross section of the first flow channel groove 84122 and the cross section of the second flow channel groove 85122 are 4 mm and 0.5 mm respectively.

[0125] In one implementation, the first outer edge accelerating flow channel groove 84121 and the first flow channel groove 84122 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 84121 and the first flow channel groove 84122 closest to the first outer edge accelerating flow channel groove 84121 is 1.5mm to 4mm, and the interval range between the first flow channel grooves 84122 is 1.5mm to 4mm.

[0126] Exemplarily, the width of the first outer edge accelerating flow channel groove 84121 and the first flow channel groove 84122 is 1.3 mm at the narrow part and 5 mm at the wide part.

[0127] The first outer edge accelerating flow channel groove 84121 includes a first buffer section flow channel groove 841211 and a first accelerating section flow channel groove 841212; the length ratio of the first buffer section flow channel groove 841211 to the first accelerating section flow channel groove 841212 is 4:1, which is used to accelerate seawater and guide the seawater to flow vertically into the negative plate 7.

[0128] The second outer edge accelerating flow channel groove 85121 and the second flow channel groove 85122 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 85121 and the second flow channel groove 85122 closest to the second outer edge accelerating flow channel groove 85121 is 1.5mm to 4mm, and the interval range between the second flow channel grooves 85122 is 1.5mm to 4mm.

[0129] Exemplarily, the width of the second outer edge accelerating flow channel groove 85121 and the second flow channel groove 85122 at the narrow part is 1.3 mm, and the width of the wide part is 5 mm.

[0130] The second outer edge accelerating flow channel groove 85121 includes a second buffer section flow channel groove 851211 and a second accelerating section flow channel groove 851212; the length ratio of the second buffer section flow channel groove 851211 to the second accelerating section flow channel groove 851212 is 4:1, which is used to accelerate seawater and guide the seawater to flow vertically from the negative electrode plate 7 into the second guide groove 85.

[0131] In one implementation, the edge curve parameter of the first branch guide groove 841 is y;

[0132] Wherein, the expression of y is:

[0133]

[0134] Wherein, y is the edge curve parameter of the first branch guide groove 841, 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.

[0135] It should be noted that Figure 8 is the edge curve diagram of the first guide groove 841. The parameters G, h, D, and x are specifically represented by Figure 8 The corresponding parameter marks in the figure are as follows: G is the height from the boundary of the liquid inlet 82 of the electrode frame 8 to the boundary of the negative electrode plate 7; 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.

[0136] In one implementation, the edge curve parameter of the second branch guide groove 851 is s;

[0137] Wherein, the expression of s is:

[0138]

[0139] Wherein, s is the edge curve parameter of the second branch guide groove 851, E is the fourth length, f is the fifth length, P is the sixth length, z mis 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.

[0140] It should be noted that Fig. 9 is the edge curve diagram of the second guide groove 851. The parameters E, f, P, and z are specifically represented by Fig. 9 The corresponding parameter marks in the figure are as follows: E is the height from the boundary of the liquid outlet 83 of the electrode frame 8 to the boundary of the negative electrode plate 7; 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.

[0141] Embodiment 2

[0142] See also Fig.10 , a method for evaluating the structural performance of a seawater-activated battery monomer, the method comprising:

[0143] S1, obtaining negative plate velocity value information, negative plate area information and negative plate time information; the negative plate velocity value information includes a maximum value, a minimum value and a flow rate value sequence; the negative plate area information includes a negative plate gas phase area and a negative plate area; the negative plate time information includes a first time information, a second time information and a third time information;

[0144] It should be noted that the velocity value information of the negative plate includes a maximum value, a minimum value and a flow rate value sequence, which is to set several horizontal characteristic lines and several longitudinal characteristic lines on the negative plate, and then in the process of seawater flowing from the liquid inlet of the electrode frame to the liquid outlet of the electrode frame, the flow velocity is continuously collected on the above-mentioned several characteristic lines to obtain a flow rate value sequence, and the maximum and minimum values ​​of the flow rate are obtained through calculation and processing of the flow rate value sequence.

[0145] It should be noted that the gas phase area of ​​the negative electrode plate refers to the area occupied by the gas in the channels formed by the negative electrode plate, and the negative electrode plate area refers to the total area of ​​the negative electrode plate.

[0146] It should be noted that the negative plate time information refers to the change of the liquid level with time t after seawater enters the negative plate from the liquid inlet of the electrode frame, which is divided into three time periods, namely Rapid 1 period, Stable period and Rapid 2 period.

[0147] S2, using the first battery structure model, calculating the maximum value, minimum value and flow rate value sequence to obtain the flow rate information of the seawater activated battery monomer structure.

[0148] Wherein, the first battery structure model is:

[0149]

[0150] Where DCSC is the flow rate information, DY is the first correction parameter, MA is the maximum value, MI is the minimum value, and XL is the flow rate value sequence.

[0151] It should be noted that the first correction parameter may be set by the user or obtained based on historical data.

[0152] S3, using the second battery structure model, calculating the gas phase area of ​​the negative electrode plate and the electrode area of ​​the negative electrode plate to obtain the proportion information of the seawater-activated battery monomer structure.

[0153] Wherein, the second battery structure model is:

[0154]

[0155] Wherein, ZB is the proportion information, DE is the second correction parameter, QX is the gas phase area of ​​the negative plate, and JB is the electrode area of ​​the negative plate.

[0156] It should be noted that the second correction parameter can be set by the user or obtained based on historical data.

[0157] S4, using the third battery structure model, calculating the first time information, the second time information and the third time information to obtain flow rate time information of the seawater activated battery monomer structure;

[0158] Wherein, the third battery structure model is:

[0159] T = U1*T1+U2*T2+U3*T3;

[0160] Wherein, T is the flow rate time information, 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.

[0161] 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.

[0162] S5, performing performance evaluation calculation on the seawater-activated battery monomer structure according to the flow rate information, proportion information and flow rate time information of the seawater-activated battery monomer structure, and obtaining a performance evaluation result of the seawater-activated battery monomer structure.

[0163] Among them, the expression for performance evaluation calculation is:

[0164] DCJG=a1*DCSC+a2*ZB+a3*T;

[0165] Wherein, DCJG is the performance evaluation result, a1 is the first correction factor, a2 is the second correction factor, a3 is the third correction factor, DCSC is the flow rate information, ZB is the proportion information, and T is the flow rate time information.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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 seawater activated battery cell structure, characterized in that: It includes a current collecting column, a first sealing cover, a second sealing cover, a current collecting plate, a negative electrode plate, an electrode frame, a copper mesh and a positive electrode plate; Adjacent surfaces of the first sealing cover and the second sealing cover are both provided with grooves; There are two current collecting plates, which are respectively correspondingly attached to the groove of the first sealing cover and the groove of the second sealing cover; The positive electrode plate and the copper mesh are stacked on the current collecting plate attached to the second sealing cover; The negative electrode plate is attached to the current collecting plate attached to the first sealing cover; A first through hole is provided in the middle of the electrode frame, and the edge of the negative electrode plate is in contact with the edge of the first through hole so that the negative electrode plate covers the first through hole; The surface of the first sealing cover provided with the groove and the surface of the second sealing cover provided with the groove are both attached to the electrode frame; The groove depth of the first sealing cover is the same as the thickness of the current collecting plate; The groove depth of the second sealing cover is the same as the superposition thickness of the current collecting plate, the positive electrode plate and the copper mesh; The frame body opposite to the electrode frame is provided with a liquid inlet and a liquid outlet correspondingly, and the second sealing cover is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet of the electrode frame overlap with the liquid inlet and the liquid outlet of the second sealing cover, so as to allow seawater to enter and exit the electrode frame; A second through hole is provided at the center of the first sealing cover, a third through hole is provided at the center of the second sealing cover, and the number of the current collecting posts is 2, one is provided on the second through hole, and the other is provided on the third through hole; wherein, A plurality of spoiler columns are arranged on the negative electrode plate; The electrode frame is provided with a first guide groove and a second guide groove; one end of the first guide groove is connected to the liquid inlet of the electrode frame, and the other end is connected to the negative electrode plate; one end of the second guide groove is connected to the liquid outlet of the electrode frame, and the other end is connected to the negative electrode plate; The first guide groove is used to guide the seawater to be evenly distributed into the negative electrode plate; the second guide groove is used to guide the seawater to be evenly distributed to the liquid outlet of the electrode frame.

2. The seawater activated battery cell structure according to claim 1, characterized in that: The first flow guide groove includes a plurality of first branch flow guide grooves, and the plurality of first branch flow guide grooves are arranged on both sides of a line connecting the center point of the liquid inlet of the electrode frame and the center point of the first through hole; one end of the first branch flow guide groove is connected to the liquid inlet of the electrode frame, and the other end is connected to the negative electrode plate; The first branch flow 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 of the electrode frame, 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 negative electrode plate; the connection between the first flow channel area and the second flow channel area is a deflection angle of 30°-65°.

3. The seawater activated battery cell structure according to claim 2, characterized in that: The second flow channel area includes one first outer edge accelerating flow channel groove and a plurality of first flow channel grooves; one end of the first outer edge accelerating flow channel groove and the first flow channel groove are both connected to the first flow channel area, and the other end are both connected to the negative electrode plate.

4. The seawater activated battery cell structure according to claim 3, characterized in that: The second flow guide groove includes a plurality of second branch flow guide grooves, and the plurality of second branch flow guide grooves are arranged on both sides of a line connecting the center point of the liquid outlet of the electrode frame and the center point of the first through hole; one end of the second branch flow guide groove is connected to the liquid outlet of the electrode frame, and the other end is connected to the negative electrode plate; 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 of the electrode frame, 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 negative electrode plate; the connection between the third flow channel area and the fourth flow channel area is a deflection angle of 30°-65°.

5. The seawater activated battery cell structure according to claim 4, characterized in that: The fourth flow channel area includes one second outer edge accelerating flow channel groove and a plurality of second flow channel grooves; one end of the second outer edge accelerating 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 negative electrode plate.

6. The seawater activated battery cell structure according to claim 5, characterized in that: The width of the end of the first branch flow guide groove connected to the liquid inlet of the electrode frame is 2mm-4mm; the width of the end of the second branch flow guide groove connected to the liquid outlet of the electrode frame is 2mm-4mm; The negative electrode plate is rectangular, with a length of 100mm-150mm and a width of 100mm-150mm; 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.

7. The seawater activated battery cell structure 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.

8. The seawater activated battery cell structure according to claim 1, 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.

9. The seawater activated battery cell structure according to claim 1, characterized in that: The edge curve parameter of the second branch diversion groove 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.

10. A method for evaluating the structural performance of a seawater-activated battery cell, characterized in that: Applied to the seawater-activated battery monomer structure according to any one of claims 1 to 9, the method comprising: S1, obtaining negative plate velocity value information, negative plate area information and negative plate time information; the negative plate velocity value information includes a maximum value, a minimum value and a flow rate value sequence; the negative plate area information includes a negative plate gas phase area and a negative plate area; the negative plate time information includes first time information, second time information and third time information; S2, using the first battery structure model, calculating the maximum value, the minimum value and the flow rate value sequence to obtain flow rate information of the seawater activated battery monomer structure; Wherein, the first battery structure model is: Wherein, DCSC is the flow rate information, DY is the first correction parameter, MA is the maximum value, MI is the minimum value, and XL is the flow rate value sequence; S3, using the second battery structure model, calculating the gas phase area of ​​the negative electrode plate and the electrode area of ​​the negative electrode plate to obtain the proportion information of the seawater activated battery monomer structure; Wherein, the second battery structure model is: Wherein, ZB is the proportion information, DE is the second correction parameter, QX is the gas phase area of ​​the negative electrode plate, and JB is the plate area of ​​the negative electrode plate; S4, using a third battery structure model, calculating the first time information, the second time information and the third time information to obtain flow rate time information of the seawater activated battery monomer structure; Wherein, the third battery structure model is: T = U1*T1+U2*T2+U3*T3; Wherein, T is the flow velocity time information, 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 a performance evaluation calculation on the seawater-activated battery monomer structure according to the flow rate information, the proportion information and the flow rate time information of the seawater-activated battery monomer structure to obtain a performance evaluation result of the seawater-activated battery monomer structure; Among them, the expression for performance evaluation calculation is: DCJG=a1*DCSC+a2*ZB+a3*T; In the formula, DCJG is the performance evaluation result, a1 is the first correction factor, a2 is the second correction factor, a3 is the third correction factor, DCSC is the flow rate information, ZB is the proportion information, and T is the flow rate time information.

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