Wave energy auxiliary type dissolved oxygen seawater battery and application thereof

Abstract

The invention belongs to the technical field of chemical power sources, and particularly discloses a wave energy auxiliary type dissolved oxygen seawater battery and application thereof.The wave energy auxiliary type dissolved oxygen seawater battery comprises a seawater battery power generation module and a wave energy collection module, and the seawater battery power generation module comprises a cathode and an anode; the wave energy collecting module comprises a wave energy conversion device and an input adjusting system, the cathode is fixedly connected with the output tail end of the wave energy conversion device through a coupler, the cathode comprises a plurality of single-spiral-structure carbon fiber brushes, and the multiple single-spiral-structure carbon fiber brushes are arrayed around the anode. Compared with a traditional dissolved oxygen seawater battery, the internal resistance of a battery system is reduced, and along with the reaction of the seawater battery, side reactants formed on the surface of the cathode can be discharged through an active flow field; the cathode is driven to rotate by converting wave energy, so that the surface flow field of the cathode is changed, and the output performance of the seawater battery is improved; the mass transfer barrier is broken, and the concentration of dissolved oxygen on the surface of the cathode is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a wave energy assisted dissolved oxygen seawater battery and applications thereof. Background Art

[0002] The ocean is one of the indispensable ecosystems on Earth. Ocean development is inseparable from the deployment of sensor networks, which in turn leads to the need for multi-directional underwater power sources in the ocean. The use of dissolved oxygen seawater batteries to achieve in-situ power conversion has shown unprecedented potential. At present, researchers at home and abroad are focusing on materials, catalysts and structural design for dissolved oxygen seawater batteries. The materials of seawater batteries usually use high negative potential metals as anodes and oxygen reduction electrodes as cathodes to load oxygen reduction catalysts and directly place them in natural electrolyte seawater.

[0003] Dissolved oxygen seawater batteries can be divided into dynamic and static types according to the different battery carriers. The static type dissolved oxygen seawater battery has a structure in which the cathode is arranged around the anode, and is usually fixed to the seabed. It is used to power underwater low-power sensor networks and other equipment. The electrochemical reaction activity of the cathode is restricted by the low flow rate and low dissolved oxygen concentration in the deep sea, and the power is relatively low. The dynamic type dissolved oxygen seawater battery has a structure in which the cathode and the anode are arranged alternately, and is usually carried on underwater vehicles. Through structural design, the high-speed movement of the submersible forces seawater to flow through the battery at high speed, ensuring that sufficient dissolved oxygen participates in the cathode electrochemical reaction, thereby achieving higher power output. The basic principle of dissolved oxygen seawater battery is to use seawater as electrolyte, dissolved oxygen in seawater as reactant, and sacrifice high energy density metal to generate electricity. Its advantages are that first, it does not require a large pressure vessel shell, which greatly reduces the weight of the battery and directly increases the unit energy density of the battery; secondly, it does not need to carry the stored electrolyte solution, which simplifies the problem of electrolyte freezing and flow difficulties at low temperatures; at the same time, the battery is an open system relative to seawater, with a relatively simple structure. It can also exchange heat through the flow of seawater, bring out the heat released by the electrode reaction, control the temperature of the battery system, and significantly improve the battery stability; and the open system can take away the side reaction products with the help of flowing seawater, to a certain extent eliminate the polarization effect of the reactants on the electrodes, which is conducive to the long-term stability of the electrode discharge performance; finally, as a metal corrosion battery, the metal is dissolved into seawater after the metal is discharged, which will not affect the seawater environment. It is a new type of underwater power source with no carbon emissions and is environmentally friendly. However, there are still some shortcomings in the current dissolved oxygen seawater battery. The current dissolved oxygen seawater battery still has problems such as low power density and power reduction caused by side reactants attached to the cathode surface after long-term operation.

[0004] In summary, dissolved oxygen seawater batteries still need innovation to improve the output performance and reliability of the batteries. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a wave energy assisted dissolved oxygen seawater battery and its application, which uses wave energy to construct an active flow field on the cathode surface of the dissolved oxygen seawater battery to achieve high volume power density output of the dissolved oxygen seawater battery.

[0006] In order to achieve the above objectives, the technical solution of the present invention is: a wave energy assisted dissolved oxygen seawater battery, including a seawater battery power generation module and a wave energy collection module, the seawater battery power generation module includes a cathode and an anode, the wave energy collection module includes a wave energy conversion device and an input regulation system, the cathode is fastened to the output end of the wave energy conversion device through a coupling, the cathode includes a plurality of single helical structure carbon fiber brushes, and the plurality of single helical structure carbon fiber brushes are arrayed around the anode.

[0007] In a preferred embodiment of the present invention, the seawater battery power generation module further includes a cathode current collector, and the material of the cathode current collector is pure titanium.

[0008] In a preferred embodiment of the present invention, the single helical structure carbon fiber brush needs to be plasma processed before use, and the carbon fiber brush after plasma processing has the characteristic of high specific surface area.

[0009] In a preferred embodiment of the present invention, the cathode rotation speed is 20-60 r / min.

[0010] In a preferred embodiment of the present invention, the anode material is magnesium alloy.

[0011] In a preferred embodiment of the present invention, the shell of the wave energy assisted dissolved oxygen seawater battery is made of acrylic plate.

[0012] In a preferred embodiment of the present invention, the shell of the wave energy assisted dissolved oxygen seawater battery is provided with a plurality of dense holes, which facilitate mass transfer and diffusion while playing the role of supporting and blocking foreign matter.

[0013] The invention discloses an application of a wave energy assisted dissolved oxygen seawater battery in a buoy-based high-power marine power supply device.

[0014] In a preferred embodiment of the present invention, the high-power ocean power supply device includes a buoy platform and a wave energy-assisted dissolved oxygen seawater battery. The buoy platform is provided with a through hole. The wave energy-assisted seawater battery is placed underwater in the ocean through the through hole and is limitedly connected to the buoy platform. The through hole can convert irregularly moving waves into unidirectional reciprocating motion energy after entering the through hole.

[0015] Further preferably, the wave energy conversion device in the wave energy assisted seawater battery floats on the water surface and is confined in the through hole of the ocean buoy.

[0016] Working principle: The wave energy assisted seawater battery is placed in the ocean, and the wave energy conversion device in the wave energy assisted seawater battery floats on the water surface; when the wave energy assisted seawater battery is working, the floating ball swing rod of the ocean buoy platform converts the irregular motion of the waves in the through hole into up and down reciprocating motion, and the wave energy conversion device converts the up and down reciprocating motion of the waves in the through hole of the buoy platform into a fixed direction rotation of the cathode of the wave energy assisted seawater battery.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Compared with the traditional dissolved oxygen seawater battery, the wave energy-assisted dissolved oxygen seawater battery of the present invention constructs an active flow field on the cathode surface of the dissolved oxygen seawater battery through wave energy, thereby reducing the internal resistance of the entire battery system. The construction of the active flow field proceeds with the reaction of the seawater battery, and the side reactants such as magnesium hydroxide formed on the cathode surface can be discharged through the active flow field; the cathode is driven to rotate by converting wave energy, so that the flow field on the cathode surface of the seawater battery changes, thereby improving the output performance of the seawater battery; the mass transfer barrier is broken, and the dissolved oxygen concentration on the cathode surface is increased;

[0019] 2. The wave energy-assisted dissolved oxygen seawater battery of the present invention can be carried on an ocean buoy for use, using seawater as an electrolyte and dissolved oxygen in seawater as a reactant, sacrificing high energy density metals to generate electrical energy, using wave energy to construct an active flow field on the cathode surface to break the mass transfer barrier, reduce the thickness of the diffusion layer, and discharge side reactants at the same time, thereby improving the output performance of the seawater battery;

[0020] 3. The buoy-based high-power ocean power supply device of the present invention converts the movement direction of waves through the buoy through-holes, which is conducive to the collection of wave energy;

[0021] 4. The present invention is based on the dissolved oxygen seawater battery, while continuing its advantages, further improving its power density and expanding its practicality;

[0022] 5. The present invention is different from the previous static mode and the mode of constructing a flow field in a large range. It only constructs an active flow field in a small range on the cathode surface, so that the dissolved oxygen concentration on the cathode surface is increased and the side reactants are separated under low flow rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the wave energy assisted dissolved oxygen seawater battery of the present invention;

[0024] Figure 2This is a disassembled view of the three-dimensional structural parts of the wave energy assisted dissolved oxygen seawater battery of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the wave energy conversion area of ​​the wave energy assisted dissolved oxygen seawater battery of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the seawater battery area of ​​the wave energy assisted dissolved oxygen seawater battery of the present invention;

[0027] Figure 5 It is a three-dimensional structural cross-sectional view of the seawater battery area of ​​the wave energy assisted dissolved oxygen seawater battery of the present invention.

[0028] The markings in the figure are as follows: 1-wave energy conversion zone cover; 2-wave energy conversion zone housing; 3-floating ball swing rod; 4-first one-way bearing; 5-first input shaft; 6-volute spring; 7-first output gear; 8-volute spring box cover; 9-second output gear; 10-second input shaft; 11-second one-way bearing; 12-third one-way bearing; 13-fourth one-way bearing; 14-fifth one-way bearing; 15-first energy conversion bevel gear; 16-second energy conversion bevel gear; 17-third energy conversion bevel gear; 18-fourth energy conversion bevel gear; 19-fifth energy conversion Bevel gear; 20-sixth energy conversion bevel gear; 21-sixth one-way bearing; 22-seventh one-way bearing; 23-first bearing baffle; 24-second bearing baffle; 25-first seawater battery support plate; 26-third input shaft; 27-fourth input shaft; 28-first coupling; 29-second coupling; 30-first carbon fiber brush; 31-second carbon fiber brush; 32-first titanium wire current collector; 33-second titanium wire current collector; 34-magnesium alloy rod; 35-first cathode baffle; 36-second cathode baffle; 37-second seawater battery support plate; 38-seawater battery casing. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to these embodiments.

[0030] A wave energy assisted dissolved oxygen seawater battery comprises a seawater battery power generation module and a wave energy collection module. The seawater battery power generation module comprises a cathode and an anode. The wave energy collection module comprises a wave energy conversion device and an input regulation system. The cathode is fastened to the output end of the wave energy conversion device through a coupling. The cathode comprises a plurality of single helical carbon fiber brushes. The plurality of single helical carbon fiber brushes are arrayed around the anode.

[0031] like Figure 1As shown, a wave energy assisted dissolved oxygen seawater battery specifically includes a wave energy conversion zone cover 1, a wave energy conversion zone shell 2, a floating ball swing rod 3, a first one-way bearing 4, a first input shaft 5, a spiral spring 6; a first output gear 7, a spiral spring box cover 8, a second output gear 9, a second input 10, a second one-way bearing 11, a third one-way shaft 12, a fourth one-way bearing 13, a fifth one-way shaft 14, a first energy conversion bevel gear 15, a second energy conversion bevel gear 16, a third energy conversion bevel gear 17, a fourth energy conversion bevel gear 18, a fifth one-way shaft 19, a first energy conversion bevel gear 20, a second energy conversion bevel gear 21, a third energy conversion bevel gear 22, a fourth energy conversion bevel gear 23, a fifth one-way shaft 24, a first energy conversion bevel gear 25, a second energy conversion bevel gear 26, a third energy conversion bevel gear 27, a fourth energy conversion bevel gear 28, a fifth one-way shaft 29, a first energy conversion bevel gear 30, a second energy conversion bevel gear 31, a second energy conversion bevel gear 32, a third energy conversion bevel gear 33, a fourth energy conversion bevel gear 34, a fifth one-way shaft 35, a first energy conversion bevel gear 36, a second energy conversion bevel gear 37, a fourth energy conversion bevel gear 38, a fifth one-way shaft 39, a first energy conversion bevel gear 40, a second energy conversion bevel gear 41, a third energy conversion bevel gear 42, a fourth energy conversion bevel gear 43, a fifth one-way shaft 44, a first energy conversion bevel gear 45, a second energy conversion bevel gear 46, a third energy conversion bevel gear 47, a fourth energy conversion bevel gear 48, a fifth one-way shaft 49, a Energy conversion bevel gear 19, sixth energy conversion bevel gear 20, sixth one-way bearing 21, seventh one-way bearing 22, first bearing baffle 23, second bearing baffle 24, first seawater battery support plate 25, third input shaft 26, fourth input shaft 27, first coupling 28, second coupling 29, first carbon fiber brush 30, second carbon fiber 31, first titanium wire current collector 32, second titanium wire current collector 33, magnesium alloy rod 34, first cathode baffle 35, second cathode baffle 36, second seawater battery support plate 37, seawater battery housing 38.

[0032] The wave energy collection module of this embodiment converts wave energy into kinetic energy of self-rotation of cathode of seawater battery, actively bypasses cathode interface, thereby breaking mass transfer barrier and realizing high power density output of seawater battery. The floating ball swinging rod 3 in the wave energy collection device converts wave energy of up and down movement in the buoy through hole into reciprocating swinging energy, and makes the first input shaft 5 rotate in one direction through the first one-way bearing 4. The input adjustment system in the wave energy collection module is composed of the first input shaft 5, the spiral spring 6, the first output gear 7, and the coil spring box cover 8. There is a square through hole on the first input shaft 5, and the central spring leaf of the spiral spring 6 is inserted into the square through hole and is limitedly connected with the first input shaft 5; the coil spring box cover 8 limits the spiral spring 6 to the first output gear 7, and is limitedly connected to the first output gear 7 through a pin; the coil spring box cover 8 has a threaded through hole, which is fastened to the outer end spring leaf of the spiral spring 6 by bolts; the input adjustment system adjusts the discontinuous and unstable energy input by the first input shaft 5 into continuous and stable energy and outputs it by the first output gear 7. The second output gear 9 is fastened to the second input shaft 10 by a top screw, and the first output gear 7 drives the second input shaft 10 to rotate unidirectionally through the second output gear 9; the second one-way bearing 11 and the third one-way bearing 12 are locked in opposite directions; the fourth one-way bearing 13 and the fifth one-way bearing 14 are locked in opposite directions; the second input shaft 10 drives the first energy conversion bevel gear 15 to rotate unidirectionally through the second one-way bearing 11. The second input shaft 10 drives the third energy conversion bevel gear 17 to rotate unidirectionally through the fourth one-way bearing 13; the second energy conversion bevel gear 16 cooperates with the third one-way bearing 12 and the fourth energy conversion bevel gear 18 cooperates with the fifth one-way bearing 14 to idle when the system is working normally, and locks the mechanism when the system is reversed; the first energy conversion bevel gear 15 drives the fifth energy conversion bevel gear 19 to rotate unidirectionally, and the third energy conversion bevel gear 17 drives the sixth energy conversion bevel gear 20 to rotate unidirectionally; the fifth energy conversion bevel gear 19 drives the third input shaft 26 to rotate unidirectionally through the sixth one-way bearing 21, and the sixth energy conversion bevel gear 20 drives the fourth input shaft 27 to rotate unidirectionally through the seventh one-way bearing 22; the third input shaft 26 and the fourth input shaft 27 are limitedly connected to the first seawater battery support plate 25 through deep groove ball bearings, and the deep groove ball bearings are limited to the first seawater battery support plate 25 through the first bearing baffle 23 and the second bearing baffle 24; the third input shaft 26 is inserted into the upper hole of the first coupling 28 and is fastened by a top screw.The first cathode baffle 35 and the second cathode baffle 36 are fastened to the second seawater battery support plate 37 through nuts; the first cathode baffle 35 is used to prevent the first titanium wire current collector 32 from shaking too much during rotation; the second cathode baffle 36 is used to prevent the second titanium wire current collector 33 from shaking too much during rotation; the seawater battery shell 38 is made of acrylic material, which is convenient for observing the internal state of the seawater battery. At the same time, a number of dense small holes are opened on the side of the seawater battery shell 38, which is convenient for mass transfer in the seawater battery while blocking large pollutants from entering the seawater battery; the upper end of the seawater battery shell 38 is fastened to the first seawater battery support plate 25 by bolts, and the lower end of the seawater battery shell 38 is connected to the second seawater battery support plate 37 by bolts.

[0033] The seawater battery power generation module and the wave energy collection module are driven by a coupling. The seawater battery power generation module also includes a cathode current collector, and the material of the cathode current collector is pure titanium. The cathode of the seawater battery is surface treated with a plasma processing equipment. The parameters of the plasma processing equipment are that the power is 600 watts and the processing time is 5-6 minutes. Each carbon fiber in the cathode carbon fiber brush electrode presents a plum blossom shape and has the characteristics of high specific surface area. The cathode of the seawater battery is a carbon fiber brush electrode, which is made of two titanium wires and short carbon fibers. One end of the two pure titanium wire current collectors is fixedly connected to the coupling 28 and one end of the coupling 29 respectively, and the coupling 28 and the coupling 29 are connected to the output end of the wave energy collection module. The cathode of the seawater battery can rotate under the drive of the wave energy collection device. When the wave excitation is 0.3-1Hz, the rotation speed of the cathode of the seawater battery converted by wave energy is 20-60r / min. The carbon fibers on the carbon fiber brush cathode are twisted into a spiral shape by two titanium wires. The spiral shape has a larger surface area and helps the circulation of seawater when the cathode rotates. The first titanium wire current collector 32 fixes the first carbon fiber brush 30 through a double helix structure, and the second titanium wire current collector 33 fixes the second carbon fiber brush 31 through a double helix structure; the diameter of the spiral part is about 3 cm and the length is about 15 cm. In this embodiment, the anode of the seawater battery specifically adopts an AZ61 magnesium alloy rod. It has a diameter of about 5 cm and a length of about 15 cm. The upper end of the AZ61 magnesium alloy rod is connected to the stainless steel stud 6 by a thread, and the stainless steel stud 6 serves as the anode current collector. The upper end of the magnesium alloy rod 34 has a thread, and the upper end of the magnesium alloy rod 34 is inserted into the central through hole of the first seawater battery support plate 25 and is fastened by a nut. The cathode and anode of the seawater battery are connected to a rechargeable battery (such as a lead-acid battery or a lithium battery, etc.), and the electrical equipment is powered by the rechargeable battery.

[0034] The invention discloses an application of a wave energy assisted dissolved oxygen seawater battery in a buoy-based high-power marine power supply device.

[0035] The high-power ocean power supply device includes a buoy platform and a wave energy-assisted dissolved oxygen seawater battery. The buoy platform is provided with a through hole. The wave energy-assisted seawater battery is placed underwater in the ocean through the through hole and is limitedly connected to the buoy platform. The through hole can convert irregularly moving waves into unidirectional reciprocating energy after entering the through hole. The wave energy conversion device in the wave energy-assisted seawater battery floats on the water surface and is limited in the through hole of the ocean buoy.

[0036] When working, the wave energy assisted seawater battery is placed in the ocean, and the wave energy conversion device in the wave energy assisted seawater battery floats on the water surface; when the wave energy assisted seawater battery is working, the floating ball swing rod of the ocean buoy platform converts the irregular movement of waves in the through hole into up and down reciprocating motion, and the wave energy conversion device converts the up and down reciprocating motion of waves in the through hole of the buoy platform into a fixed direction rotation of the cathode of the wave energy assisted seawater battery.

[0037] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wave energy assisted dissolved oxygen seawater battery, characterized in that: It includes a seawater battery power generation module and a wave energy collection module, the seawater battery power generation module includes a cathode and an anode, the wave energy collection module includes a wave energy conversion device and an input regulation system, the cathode is fastened to the output end of the wave energy conversion device through a coupling, the cathode includes a plurality of single helical structure carbon fiber brushes, and the plurality of single helical structure carbon fiber brush arrays are around the anode.

2. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: The seawater battery power generation module also includes a cathode current collector, and the material of the cathode current collector is pure titanium.

3. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: The single helical structure carbon fiber brush needs to be plasma processed before use.

4. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: The cathode rotation speed is 20-60r / min.

5. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: The anode material is magnesium alloy.

6. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: The shell of the wave energy assisted dissolved oxygen seawater battery is made of acrylic board.

7. The wave energy assisted dissolved oxygen seawater battery according to claim 1, characterized in that: A plurality of dense holes are arranged on the outer shell of the wave energy assisted dissolved oxygen seawater battery.

8. Use of the wave energy assisted dissolved oxygen seawater battery as claimed in any one of claims 1 to 7 in a buoy-based high-power marine power supply device.

9. The high-power ocean power supply device according to claim 8, characterized in that: It comprises a buoy platform and a wave energy assisted dissolved oxygen seawater battery. The buoy platform is provided with a through hole. The wave energy assisted seawater battery is placed underwater in the ocean through the through hole and is limitedly connected to the buoy platform.

10. The high-power ocean power supply device according to claim 8, characterized in that: The wave energy conversion device in the wave energy assisted seawater battery floats on the water surface and is confined in the through hole of the ocean buoy.

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