CN112635799B - Electrolyte management method and management system of metal fuel cell - Google Patents
Electrolyte management method and management system of metal fuel cell Download PDFInfo
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- CN112635799B CN112635799B CN202011637860.8A CN202011637860A CN112635799B CN 112635799 B CN112635799 B CN 112635799B CN 202011637860 A CN202011637860 A CN 202011637860A CN 112635799 B CN112635799 B CN 112635799B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
- H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses an electrolyte management method and a management system of a metal fuel cell, wherein the method comprises the following steps: supplying liquid to the galvanic pile by using a plurality of electrolyte tanks, detecting performance parameters of the electrolyte, comparing detection results of the performance parameters with preset parameter ranges respectively to determine a fault electrolyte tank, closing an electrolyte pump corresponding to the fault electrolyte tank, and supplying the electrolyte to the galvanic pile by using a non-fault electrolyte tank; the system comprises a plurality of electrolyte tanks and a three-way electromagnetic valve, wherein each electrolyte tank with a detection device is respectively connected with the electric pile, each liquid supply pipeline is respectively provided with an electrolyte pump, the electrolyte tanks are connected with an electrolyte supply box, and the valve ports of the three-way electromagnetic valve are used for correspondingly connecting the electrolyte tanks and the electrolyte supply box. The invention can provide high-quality electrolyte for the metal fuel cell stack all the time, can avoid the influence of sediments generated in the electrolyte reaction process on the electrolyte performance, and achieves the purposes of obviously improving the metal fuel cell performance on the premise of low cost and the like.
Description
Technical Field
The invention relates to the technical field of metal fuel cells, in particular to an electrolyte management method and an electrolyte management system of a metal fuel cell.
Background
At present, because the metal fuel cell has the characteristics of high efficiency, environmental protection, cleanness and the like, the metal fuel cell becomes one of the research hotspots in the field of new energy at present, for example, an aluminum air cell with high energy density becomes the priority of a high-energy and high-power standby power supply.
However, metal fuel cells represented by aluminum-air cells often have the following problems: as the reaction progresses, precipitates are generated in the electrolyte, and the precipitates may cause a decrease in the electrolyte performance, such as a decrease in the conductivity of the electrolyte, thereby decreasing the power output capability of the metal fuel cell and limiting the application scenarios of the metal fuel cell.
In addition, in the actual working process of the metal fuel cell, when the relative humidity of air is too high, electrolyte can absorb moisture, the concentration of the electrolyte is reduced, the conductivity of an electrode is reduced, and the resistance of the cell is increased; if the relative humidity of the air is too low, the evaporation of water in the battery can be caused, the concentration of the electrolyte is increased, and various performances of the battery are reduced; and because the positive active substance is oxygen in the air, carbon dioxide in the air can enter the electrolyte in the using process, so that the electrolyte is carbonated, the carbonation phenomenon directly reduces the conductivity of the electrolyte, the internal resistance of the battery is increased, and the performance of the battery is reduced. Therefore, the electrolyte performance tends to decrease as the reaction process proceeds.
The existing solutions are generally to replenish new electrolyte or purify electrolyte in real time; as for the mode of supplementing new electrolyte, a large amount of electrolyte is inevitably consumed, so that the cost of the metal fuel cell is greatly increased, and the large-area popularization and application are difficult to carry out; for the method of purifying the electrolyte in real time, firstly, the time is required in the process of purifying the electrolyte, and the requirement of the metal fuel cell for high power output capability often cannot be met, and secondly, the existing method of purifying the electrolyte needs to consume a large amount of energy, so that the cost of the metal fuel cell can be still obviously increased, and the application occasion of the metal fuel cell is limited.
Therefore, how to ensure that the metal fuel cell has high power output capability all the time on the basis of controlling the cost of the metal fuel cell and make the application range of the metal fuel cell wider becomes a key point of urgent solution and research for technical problems of the technical staff in the field.
Disclosure of Invention
The invention provides an electrolyte management method and an electrolyte management system of a metal fuel cell, aiming at solving the problems that the existing metal fuel cell can not give consideration to high power output capability, low cost design and the like, and the invention can uninterruptedly provide high-quality electrolyte for a metal fuel cell stack on the premise of low cost so as to achieve the purposes that the discharge performance of the metal fuel cell is not reduced along with the reduction of the conductivity of the electrolyte and the like, so that the application range of the metal fuel cell is wider, and various problems in the prior art are thoroughly solved.
In order to achieve the technical purpose, the invention discloses an electrolyte management method of a metal fuel cell, which comprises the following steps;
step 1, supplying electrolyte to a metal fuel cell stack by utilizing at least one electrolyte tank in a plurality of electrolyte tanks arranged in parallel;
step 2, performing performance parameter detection on the electrolyte in an electrolyte tank which is supplying the electrolyte to the metal fuel cell stack to obtain at least one performance parameter detection result;
step 3, comparing the performance parameter detection results of the electrolyte tanks with preset parameter ranges respectively; if all the performance parameter detection results are within the preset parameter range, returning to the step 2, otherwise, executing the step 4;
step 4, taking the electrolyte tank with the performance parameter detection result outside the preset parameter range as a fault electrolyte tank; closing electrolyte pumps on liquid supply pipelines of all the electrolyte tanks with faults, and simultaneously supplying electrolyte to the metal fuel cell stack by utilizing at least one electrolyte tank except the electrolyte tanks with faults;
and 5, enabling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank.
Based on the technical scheme, through the multi-electrolyte tank and the comprehensive performance parameter detection strategy thereof, the invention always provides high-quality electrolyte for the galvanic pile when the battery works, can avoid the influence of factors such as sediments and the like on the electrolyte performance, has low cost and thoroughly solves the problems in the prior art.
Further, in step 5, the electrolyte flowing back to the electrolyte supply box is naturally settled, the electrolyte is purified by making the electrolyte flow out from the lower part of the electrolyte supply box after the natural settlement, and the flowing electrolyte flows through the electrolyte filter device and then enters the waste electrolyte box.
Based on the improved technical scheme, compared with the prior art, the method can complete the performance optimization process of the electrolyte on the premise of lower cost, and the process has no influence on the normal work of the fuel cell, so that the fuel cell has wider application scenes and is suitable for large-area popularization and application.
Further, step 6, the electrolyte purified in the electrolyte supply box is used for replenishing the electrolyte for the electrolyte tank with faults.
Further, step 7, when the metal fuel cell stack stops working, the electrolyte in all the electrolyte tanks flows back to the electrolyte supply tank.
Based on the improved technical scheme, the electrolyte supply box also has the function of purifying the electrolyte in a silent mode, namely the electrolyte with slight sediments can be purified under the condition that the battery does not work, and energy is not consumed in the process of purifying through natural sedimentation.
Further, before step 1, a step of replenishing the electrolyte tanks with electrolyte supply tanks is further included.
Further, the performance parameter includes at least one of an alumina concentration, an electrolyte concentration, and an aluminate concentration.
In order to achieve the technical purpose, the invention also discloses an electrolyte management system of the metal fuel cell, which comprises a plurality of electrolyte tanks arranged in parallel, wherein each electrolyte tank is respectively connected with the metal fuel cell stack through a liquid supply pipeline, each liquid supply pipeline is respectively provided with an electrolyte pump, a detection device for detecting the performance parameters of the electrolyte is respectively arranged in each electrolyte tank, each electrolyte tank is respectively connected with the electrolyte supply tank through a liquid return pipeline, each liquid return pipeline is respectively provided with a three-way electromagnetic valve, each three-way electromagnetic valve is provided with a first valve port and a second valve port, the first valve port of the three-way electromagnetic valve is connected with the liquid return port of the electrolyte tank, and the second valve port of the three-way electromagnetic valve is connected with the liquid return port of the electrolyte supply tank.
Based on the technical scheme, through the improvement of the multi-electrolyte tank and the performance parameter detection scheme thereof, the invention provides high-quality electrolyte for the galvanic pile all the time when the battery works, can avoid the influence of factors such as sediments and the like on the electrolyte performance, has lower cost and thoroughly solves the problems in the prior art.
Further, the management system further comprises a controller;
the controller is used for obtaining performance parameter detection results obtained by detection of a detection device in an electrolyte tank which is supplying electrolyte to the metal fuel cell stack, judging whether all the performance parameter detection results are in a preset parameter range, taking the electrolyte tank with the performance parameter detection results out of the preset parameter range as a fault electrolyte tank, closing electrolyte pumps on liquid supply pipelines of all the fault electrolyte tanks, simultaneously supplying electrolyte to the metal fuel cell stack by using at least one electrolyte tank except the fault electrolyte tank, and controlling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank.
Based on the improved technical scheme, compared with the prior art, the method can complete the performance optimization process of the electrolyte on the premise of lower cost, and the process has no influence on the normal operation of the fuel cell, so that the method has wider application scenes and is suitable for large-area popularization and application.
Furthermore, the three-way electromagnetic valve is also provided with a third valve port, the third valve port of the three-way electromagnetic valve is connected with a liquid outlet of the electrolyte supply box through a liquid supplementing pipeline, and the electrolyte supply pump is arranged on the liquid supplementing pipeline;
the controller is also used for controlling the electrolyte supply pump to work, so that the electrolyte supply box is used for replenishing electrolyte for each electrolyte box.
Furthermore, electrolyte supply box lower part is the back taper, and the awl point department of electrolyte supply box lower part opens there is the waste liquid egress opening, the waste liquid egress opening is connected with electrolyte filter equipment through first waste liquid pipeline, electrolyte filter equipment passes through the second waste liquid pipeline and is connected with useless electrolyte tank, and the export and the third waste liquid pipeline of useless electrolyte tank are connected, be provided with out the liquid solenoid valve on the third waste liquid pipeline.
Based on the improved technical scheme, through the structural design of the inverted-cone-shaped electrolyte supply box, the use amount of the electrolyte can be greatly reduced in the process of purifying the electrolyte; that is, in the case of discharging the same amount of the sediment, the improved embodiment can make the amount of the electrolyte flowing out smaller.
The invention has the beneficial effects that: the invention can provide high-quality electrolyte for the metal fuel cell stack all the time, can avoid the influence of sediments generated in the electrolyte reaction process on the electrolyte performance, and further achieves the purposes of obviously improving the metal fuel cell performance on the premise of low cost and the like.
Drawings
Fig. 1 is a schematic flow chart of an electrolyte management method of a metal fuel cell.
Fig. 2 is a schematic diagram of the operating principle of the electrolyte management system of the metal fuel cell having n electrolyte tanks.
Fig. 3 is a schematic diagram of the operating principle of the electrolyte management system of the metal fuel cell with two electrolyte tanks backed up each other.
Detailed Description
The electrolyte management method and the electrolyte management system for a metal fuel cell specifically provided by the invention are explained and explained in detail below with reference to the accompanying drawings.
The first embodiment is as follows:
aiming at the problems that the conductivity of electrolyte and the performance of a metal fuel cell are generally influenced by sediments (such as aluminum oxide) generated by the existing metal fuel cell, the embodiment discloses an electrolyte management method of the metal fuel cell, when the electrolyte in one electrolyte box is unqualified, other electrolyte boxes with high-quality electrolyte can supply the electrolyte to a galvanic pile in a seamless and grounded way, and the galvanic pile can be ensured to use the high-quality electrolyte all the time; as shown in fig. 1 and 2, the management method includes the following steps.
Before step 1, as shown in fig. 2 and 3, before the metal fuel cell pair discharges electric energy, the present embodiment includes a step of replenishing the electrolyte tanks with electrolyte supply tanks so that the electrolyte in the electrolyte supply tanks flows into the electrolyte tanks.
Step 1, at least one electrolyte tank of a plurality of electrolyte tanks arranged in parallel is used for supplying electrolyte to the metal fuel cell stack, namely, in actual work, a part of the electrolyte tanks can be used for supplying electrolyte to the metal fuel cell stack, and all the electrolyte tanks can be used for supplying electrolyte to the metal fuel cell stack. In specific implementation, as described above, in this embodiment, before the metal fuel cell is ready to output electric energy to the outside, the electrolyte in the electrolyte supply tank is pumped into each electrolyte tank, and in a case where the number of electrolyte tanks is large, the electrolyte can be simultaneously supplied to two adjacent electrolyte tanks by one electrolyte pump, as shown in fig. 2.
And 2, detecting the performance parameters of the electrolyte in the electrolyte tank which supplies the electrolyte to the metal fuel cell stack to obtain at least one performance parameter detection result, and during specific implementation, detecting the performance parameters of the electrolyte in all the electrolyte tanks.
The performance parameter may include at least one of an alumina concentration, an electrolyte concentration, and an aluminate concentration, and the embodiment is specifically an alumina concentration.
Step 3, comparing the performance parameter detection results of the electrolyte tanks with preset parameter ranges respectively; and (3) if all the performance parameter detection results are within the preset parameter range, returning to the step (2), otherwise, executing the step (4), namely executing the step (4) as long as one performance parameter detection result is not within the preset parameter range, and determining the electrolyte tank with the electrolyte performance not meeting the requirement, wherein the details are shown in the step (4) and the step (5).
Step 4, taking the electrolyte tank with the performance parameter detection result outside the preset parameter range as a fault electrolyte tank; and closing electrolyte pumps on the liquid supply pipelines of all the electrolyte tanks with faults, and simultaneously supplying electrolyte to the metal fuel cell stack by utilizing at least one electrolyte tank except the electrolyte tanks with faults.
And 5, enabling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank. In step 5 of this embodiment, the method further includes a step of optimizing the electrolyte that flows back into the electrolyte supply tank, specifically, naturally settling the electrolyte that flows back into the electrolyte supply tank to precipitate precipitates such as aluminum oxide, purifying the electrolyte by flowing out the electrolyte at the lower part of the electrolyte supply tank after naturally settling, and allowing the flowing-out electrolyte to flow through the electrolyte filtering device and then enter the waste electrolyte tank, so that the electrolyte that remains in the electrolyte supply tank has better performance.
As a further improved technical solution, after the step 5, the management method further includes the following steps.
And 6, reserving the electrolyte in the electrolyte supply box to have better performance, so that the electrolyte purified in the electrolyte supply box is used as the electrolyte for supplementing the electrolyte to the fault electrolyte box.
As a further optimized technical solution, the management method further includes the following steps.
And 7, when the metal fuel cell stack stops working, enabling the electrolyte in all the electrolyte boxes to flow back to the electrolyte supply box, so that all the electrolyte can be naturally settled, and when the metal fuel cell stack works again, the electrolyte can be supplied to the stack through the processed high-quality electrolyte.
Example two:
based on the same inventive concept as the first embodiment, this embodiment specifically discloses an electrolyte management system of a metal fuel cell, which can be used to implement the electrolyte management method of the metal fuel cell in the first embodiment, the management system includes a plurality of electrolyte tanks disposed in parallel, and each electrolyte tank is connected to a metal fuel cell stack through a liquid supply pipeline, in this embodiment, before the electrolyte supplied from the electrolyte tanks reaches the metal fuel cell stack, the supplied electrolyte can be reasonably distributed through an electrolyte distribution device, electrolyte pumps are disposed on the liquid supply pipelines, detection devices for detecting performance parameters of the electrolyte are disposed in the electrolyte tanks, each electrolyte tank is connected to the electrolyte supply tank through a liquid return pipeline, and three-way electromagnetic valves are disposed on the liquid return pipelines, each three-way electromagnetic valve is provided with a first valve port and a second valve port, the first valve port of the three-way electromagnetic valve is connected with a liquid return port of the electrolyte tank, the second valve port of the three-way electromagnetic valve is connected with a liquid return port of the electrolyte supply tank, the three-way electromagnetic valve is also provided with a third valve port, the third valve port of the three-way electromagnetic valve is connected with a liquid outlet of the electrolyte supply tank through a liquid supplementing pipeline, and the electrolyte supply pump is arranged on the liquid supplementing pipeline. The electrolyte supply box is provided with an original electrolyte supplementing port, new electrolyte is supplemented for the electrolyte supply box through the original electrolyte supplementing port, a pipeline connected with the original electrolyte supplementing port can be provided with a liquid supplementing electromagnetic valve, and the liquid supplementing electromagnetic valve can be a single-way electromagnetic valve.
In this embodiment, the metal fuel cell may be an aluminum air cell or a zinc air cell, or the like.
The present embodiment can realize automatic control, and specifically, the management system further includes a controller, which is used for being in communication connection with each detection device, each electrolyte pump, each three-way electromagnetic valve, each supply pump, a fluid infusion electromagnetic valve, a fluid outlet electromagnetic valve, and the like, so as to realize detection result acquisition and valve or pump control.
And the controller is used for acquiring performance parameter detection results detected by a detection device in an electrolyte tank which is supplying electrolyte to the metal fuel cell stack, judging whether all the performance parameter detection results are in a preset parameter range, taking the electrolyte tank with the performance parameter detection results out of the preset parameter range as a fault electrolyte tank, closing electrolyte pumps on liquid supply pipelines of all the fault electrolyte tanks, simultaneously supplying the electrolyte to the metal fuel cell stack by using at least one electrolyte tank except the fault electrolyte tank, and controlling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank.
And the controller is also used for controlling the electrolyte supply pump to work so as to replenish the electrolyte for each electrolyte tank by using the electrolyte supply tank. Electrolyte supply box lower part is the back taper, the awl point department of electrolyte supply box lower part is opened there is the waste liquid egress opening, the waste liquid egress opening is connected with electrolyte filter equipment through first waste liquid pipeline, electrolyte filter equipment is arranged in filtering and retrieving the precipitate in the muddy electrolyte of outflow, electrolyte filter equipment passes through the second waste liquid pipeline and is connected with useless electrolyte case, the export and the third waste liquid tube coupling of useless electrolyte case, be provided with out the liquid solenoid valve on the third waste liquid pipeline, the end of third waste liquid pipeline is used for connecting waste liquid recovery unit or waste liquid treatment device, accomplish the clearance to precipitate and waste electrolyte when going out the liquid solenoid valve and opening. The detailed execution process of the controller can be realized by software, and the detailed description of the invention is omitted.
Example three:
the invention is based on the same inventive concept as the second embodiment, and the differences are as follows: the number of the electrolyte tanks in the embodiment is two, a metal fuel cell double-backup redundant liquid supply circulation system and a sediment filtering system can be formed, and the two redundant electrolyte tanks can reduce the equipment investment cost compared with the second embodiment, so that the invention can be applied to more occasions and fields, and is suitable for large-area popularization and application; as shown in fig. 3, specifically, the management system includes a first electrolyte tank and a second electrolyte tank connected in parallel, when the metal fuel cell starts to operate, electrolyte can be supplied to the stack by one electrolyte tank alone, or by two electrolyte tanks simultaneously, the two electrolyte tanks are connected to the metal fuel cell stack by a first liquid supply pipeline and a second liquid supply pipeline respectively, the present invention can adopt a circulation liquid supply mode, the first liquid supply pipeline is provided with a first electrolyte pump, the second liquid supply pipeline is provided with a second electrolyte pump, the first electrolyte tank is provided with a first detection device for detecting performance parameters of the electrolyte in the first electrolyte tank, the second electrolyte tank is provided with a second detection device for detecting performance parameters of the electrolyte in the second electrolyte tank, the first electrolyte tank is connected to the electrolyte supply tank by a first loop pipeline, The second electrolyte tank is connected with the electrolyte supply tank through a second loop pipeline, a first three-way electromagnetic valve is arranged on the first loop pipeline, a second three-way electromagnetic valve is arranged on the second loop pipeline, the two three-way electromagnetic valves are identical in structure and are respectively provided with a first valve port, a second valve port and a third valve port, the first valve port is used for being connected with a liquid return port of the electrolyte tank, the second valve port is used for being connected with a liquid return port of the electrolyte supply tank, the third valve port is used for being connected with a liquid outlet of the electrolyte supply tank through a liquid supplementing pipeline, and an electrolyte supply pump is arranged on the liquid supplementing pipeline. The management system further includes a controller, and the controller is in communication connection with the first detection device, the second detection device, the first electrolyte pump, the second electrolyte pump, the first three-way electromagnetic valve, the second three-way electromagnetic valve, the electrolyte supply pump, the fluid replacement electromagnetic valve, and the fluid outlet electromagnetic valve, respectively.
A controller for obtaining the detection result of the performance parameter detected by the detection device in the electrolyte tank supplying the electrolyte to the metal fuel cell stack, such as alumina (Al)2O3) The device comprises a sediment concentration detection result, a controller and a controller, wherein the sediment concentration detection result is used for judging whether performance parameter detection results of two electrolyte tanks are both in a preset parameter range, if the detection result of the concentration of aluminum oxide in one electrolyte tank is not in the preset parameter range, the electrolyte tank is used as a fault electrolyte tank, the preset parameter range can be reasonably set according to specific conditions, for example, the preset parameter range is larger than 3.9%, the controller is also used for closing an electrolyte pump on a liquid supply pipeline of the fault electrolyte tank, supplying electrolyte for a metal fuel cell stack by using one electrolyte tank at the same time, and controlling the electrolyte in the fault electrolyte tank to flow back to an electrolyte supply tank.
And the controller is also used for controlling the electrolyte supply pump to work so as to replenish the electrolyte for each electrolyte tank by using the electrolyte supply tank. Electrolyte supply box lower part is the back taper, and the awl point department of electrolyte supply box lower part is opened there is the waste liquid egress opening, and the waste liquid egress opening is connected with electrolyte filter equipment through first waste liquid pipeline, and electrolyte filter equipment passes through the second waste liquid pipeline and is connected with useless electrolyte tank, and the export and the third waste liquid pipe connection of useless electrolyte tank are provided with out the liquid solenoid valve on the third waste liquid pipeline to can discharge useless electrolyte tank with precipitates such as aluminium oxide through the mode that control goes out the liquid solenoid valve and open.
In the embodiment, the purpose of liquid supply circulation is completed by adopting double backup electrolyte tanks, the concentration of aluminum oxide sediments in the electrolyte can be detected by the detection device, when the property of the electrolyte in one of the electrolyte tanks is detected to change, the detection result can be fed back to the controller by the detection device, the controller controls the opening or closing of the corresponding electrolyte pump and the electromagnetic valve, so that the electrolyte tank which does not reach the standard stops supplying liquid for the metal fuel cell stack, the electrolyte in the electrolyte tank which does not reach the standard flows back to the electrolyte supply tank, and the other electrolyte tank with high-quality electrolyte is seamlessly switched and connected to supply high-quality electrolyte for the stack.
In specific implementation, taking an aluminum-air battery as an example, the embodiment can operate as follows:
when the aluminum air power supply is started, if the first electrolyte pump works, the first detection device detects Al of the electrolyte in the first electrolyte tank2O3When the concentration is too high, the second electrolyte pump is started to work, the first electrolyte pump is closed, then the electrolyte in the first electrolyte tank flows back to the electrolyte supply tank, and the electrolyte supply tank is used for supplying Al under the action of the electrolyte filtering device in a sedimentation mode2O3And settling to a waste electrolyte tank. Similarly, if the second electrolyte pump is operated, Al of the electrolyte in the second electrolyte tank is monitored2O3When the concentration is too high, the first electrolyte pump is started to work, the second electrolyte pump is closed, the electrolyte in the second electrolyte tank flows back to the electrolyte supply tank, and the electrolyte supply tank is used for supplying Al under the action of the electrolyte filtering device in a sedimentation mode2O3Settling to a waste electrolyte tank; the process is repeated, so that double backup liquid supply circulation and sediment Al of the aluminum air power supply can be realized2O3The automatic filtration of (2). And when the aluminum air power station stops working, the electrolyte in the first electrolyte tank and the electrolyte in the second electrolyte tank are refluxed to the electrolyte supply tank. Similarly, if both electrolyte pumps are working, Al in one electrolyte tank is monitored2O3And when the concentration is overlarge, closing an electrolyte pump on a liquid supply pipeline of the electrolyte tank, returning the electrolyte in the electrolyte tank to the electrolyte supply tank, and performing sedimentation treatment and filtration treatment on the returned electrolyte.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A method for managing electrolyte of a metal fuel cell, characterized by: the management method comprises the following steps;
step 1, supplying electrolyte to a metal fuel cell stack by utilizing at least one electrolyte tank in a plurality of electrolyte tanks arranged in parallel;
step 2, detecting performance parameters of the electrolyte in an electrolyte tank which supplies the electrolyte to the metal fuel cell stack to obtain at least one performance parameter detection result, wherein the performance parameters comprise at least one of alumina concentration, electrolyte concentration and aluminate concentration;
step 3, comparing the performance parameter detection results of the electrolyte tanks with preset parameter ranges respectively; if all the performance parameter detection results are within the preset parameter range, returning to the step 2, otherwise, executing the step 4;
step 4, taking the electrolyte tank with the performance parameter detection result outside the preset parameter range as a fault electrolyte tank; closing electrolyte pumps on liquid supply pipelines of all the electrolyte tanks with faults, and simultaneously supplying electrolyte to the metal fuel cell stack by utilizing at least one electrolyte tank except the electrolyte tanks with faults;
and 5, enabling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank.
2. The electrolyte management method of a metal fuel cell according to claim 1, characterized in that:
and 5, naturally settling the electrolyte flowing back to the electrolyte supply box, purifying the electrolyte in a mode of enabling the electrolyte on the lower part of the electrolyte supply box to flow out after naturally settling, and enabling the flowing-out electrolyte to flow through the electrolyte filtering device and then enter the waste electrolyte box.
3. The electrolyte management method of a metal fuel cell according to claim 2, characterized in that: the management method further comprises the following steps;
and 6, replenishing the electrolyte in the fault electrolyte tank by using the purified electrolyte in the electrolyte supply tank.
4. The electrolyte management method of a metal fuel cell according to claim 3, characterized in that: the management method further comprises the following steps;
and 7, enabling the electrolyte in all the electrolyte tanks to flow back to the electrolyte supply tank when the metal fuel cell stack stops working.
5. The electrolyte managing method of a metal fuel cell according to claim 2 or 3, characterized in that:
before the step 1, the method also comprises the step of replenishing the electrolyte tanks with electrolyte supply tanks.
6. An electrolyte management system for a metal fuel cell, comprising: the management system comprises a plurality of electrolyte tanks which are arranged in parallel, wherein each electrolyte tank is respectively connected with a metal fuel cell stack through a liquid supply pipeline, an electrolyte pump is respectively arranged on each liquid supply pipeline, a detection device for detecting performance parameters of electrolyte is respectively arranged in each electrolyte tank, each electrolyte tank is respectively connected with an electrolyte supply tank through a liquid return pipeline, a three-way electromagnetic valve is respectively arranged on each liquid return pipeline, each three-way electromagnetic valve is provided with a first valve port and a second valve port, the first valve port of each three-way electromagnetic valve is connected with a liquid return port of the electrolyte tank, the second valve port of each three-way electromagnetic valve is connected with the liquid return port of the electrolyte supply tank, and the performance parameters comprise at least one of alumina concentration, electrolyte concentration and aluminate concentration;
the management system further comprises a controller;
the controller is used for obtaining performance parameter detection results obtained by detection of a detection device in an electrolyte tank which is supplying electrolyte to the metal fuel cell stack, judging whether all the performance parameter detection results are in a preset parameter range, taking the electrolyte tank with the performance parameter detection results out of the preset parameter range as a fault electrolyte tank, closing electrolyte pumps on liquid supply pipelines of all the fault electrolyte tanks, simultaneously supplying electrolyte to the metal fuel cell stack by using at least one electrolyte tank except the fault electrolyte tank, and controlling the electrolyte in all the fault electrolyte tanks to flow back to the electrolyte supply tank.
7. The metal fuel cell electrolyte management system of claim 6, wherein: the three-way electromagnetic valve is also provided with a third valve port, the third valve port of the three-way electromagnetic valve is connected with a liquid outlet of the electrolyte supply box through a liquid supplementing pipeline, and the electrolyte supply pump is arranged on the liquid supplementing pipeline;
the controller is also used for controlling the electrolyte supply pump to work, so that the electrolyte supply box is used for replenishing electrolyte for each electrolyte box.
8. The electrolyte management system of a metal fuel cell according to claim 6 or 7, characterized in that: electrolyte supply box lower part is the back taper, and the awl point department of electrolyte supply box lower part is opened there is the waste liquid egress opening, the waste liquid egress opening is connected with electrolyte filter equipment through first waste liquid pipeline, electrolyte filter equipment passes through the second waste liquid pipeline and is connected with useless electrolyte tank, and the export and the third waste liquid pipe connection of useless electrolyte tank are provided with out the liquid solenoid valve on the third waste liquid pipeline.
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