CN118676411B - Flow battery pile with integrated runner plate structure - Google Patents
Flow battery pile with integrated runner plate structure Download PDFInfo
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- CN118676411B CN118676411B CN202411152336.XA CN202411152336A CN118676411B CN 118676411 B CN118676411 B CN 118676411B CN 202411152336 A CN202411152336 A CN 202411152336A CN 118676411 B CN118676411 B CN 118676411B
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- 238000007599 discharging Methods 0.000 claims abstract description 4
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Classifications
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- 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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
- H01M8/2485—Arrangements for sealing external manifolds; Arrangements for mounting external manifolds around a stack
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
本发明公开了一种带有一体式流道板结构的液流电池电堆，该电堆由一体式流道板、端板、极芯组和集电极等构成，一体式流道板分为进液流道板和出液流道板，分别安装在极芯组的进液口侧和出液口侧，流道板上设置电解液流出口和流入口，一体式流道板与极芯组组装后电解液流出口/流入口与极芯组框上的出液口/进液口相连通，电堆工作时液流电池正负极电解液在流道板与极芯组之间流动，确保液流电池电堆的充放电过程的正常进行。这种电堆结构设计没有复杂的流道密封设计，大量减少密封圈的使用量，降低了电堆的漏液风险，同时一体式流道板设计减少了安装工序，提高了安装效率，降低了成本，具备极好的应用推广前景。
The present invention discloses a flow battery stack with an integrated flow channel plate structure, the stack is composed of an integrated flow channel plate, an end plate, a pole core group and a collector, etc. The integrated flow channel plate is divided into a liquid inlet flow channel plate and a liquid outlet flow channel plate, which are respectively installed on the liquid inlet side and the liquid outlet side of the pole core group, and an electrolyte outflow port and an inflow port are arranged on the flow channel plate. After the integrated flow channel plate is assembled with the pole core group, the electrolyte outflow port/inflow port is connected with the liquid outlet/inflow port on the pole core group frame. When the stack is working, the positive and negative electrolytes of the flow battery flow between the flow channel plate and the pole core group, ensuring the normal charging and discharging process of the flow battery stack. This stack structure design does not have a complex flow channel sealing design, greatly reduces the use of sealing rings, reduces the risk of leakage of the stack, and at the same time, the integrated flow channel plate design reduces the installation process, improves the installation efficiency, reduces the cost, and has an excellent application and promotion prospect.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a flow battery pile with an integrated flow channel plate structure.
Background
The energy storage technology is an effective strategy for solving the problems of effective utilization of renewable energy sources, environmental pollution and the like, and in the existing energy storage technologies, the flow battery has the characteristics of good safety and long service life, and is an ideal battery for long-time energy storage application. In flow batteries, however, the stack is used as its core component, and the performance of the stack is directly related to the performance and cost of the overall system. The flow battery is used for charging and discharging electrolyte liquid when the electrolyte liquid circularly flows in the electric pile, so that electric energy and chemical energy are converted. In the flowing process of the electrolyte, the positive electrode electrolyte and the negative electrode electrolyte are required to flow separately, so that the occurrence of liquid mixing is reduced, and the capacity loss of the battery is avoided. The runner is arranged on the current liquid flow frame, sealing ring structures are adopted among the runners for sealing and isolation, and separation of electrolyte is achieved, but the design and processing of the runner are complex, the sealing structure is complex, multiple groups of sealing rings are needed for sealing, and the cost of a galvanic pile is increased to a certain extent.
Disclosure of Invention
In view of the above, the present invention aims to: aiming at the technical defects of the current flow battery pile structure, the flow battery pile with an integrated flow channel plate structure is disclosed, the pile is composed of an integrated flow channel plate, an end plate, a pole core group, a collector and the like, the integrated flow channel plate is divided into a liquid inlet flow channel plate and a liquid outlet flow channel plate, the liquid inlet flow channel plate and the liquid outlet flow channel plate are respectively arranged on the liquid inlet side and the liquid outlet side of the pole core group, an electrolyte flow outlet and an electrolyte flow inlet are arranged on the flow channel plate, the electrolyte flow outlet/flow inlet is communicated with the liquid outlet/liquid inlet on the pole core group frame after the integrated flow channel plate and the pole core group are assembled, and positive and negative electrolyte of the flow battery flows between the flow channel plate and the pole core group during pile working, so that the normal operation of the charge and discharge process of the flow battery pile is ensured. The pile structure design has no complicated runner sealing design, greatly reduces the use amount of the sealing ring, reduces the leakage risk of the pile, reduces the installation procedure by the integrated runner plate design, improves the installation efficiency, reduces the cost and has excellent application and popularization prospects.
In order to achieve the technical effects, the following technical scheme is adopted:
A flow battery pile with integrated flow channel plate structure is composed of integrated flow channel plate, end plate, pole core group and collector; wherein, the pole core group adopts a laminated repeat structure composed of a diaphragm, an electrode I, a bipolar plate, a pole core group frame and an electrode II; the positive electrode electrolyte liquid outlet of the pole core group frame and the negative electrode electrolyte liquid outlet of the pole core group frame are respectively arranged on the upper side surface and the lower side surface of the pole core group frame by applying normal force to the end plates on the two sides for fixed installation; the integrated runner plate is divided into a liquid inlet runner plate and a liquid outlet runner plate, the liquid inlet runner plate and the liquid outlet runner plate are respectively arranged on the liquid inlet side and the liquid outlet side of the pole core group, and the liquid inlet runner plate is provided with an anode liquid inlet and a cathode liquid inlet; the liquid outlet channel plate is provided with an anode liquid outlet and a cathode liquid outlet; after the liquid inlet runner plate is assembled with the pole core group, the positive electrode liquid inlet and the negative electrode liquid inlet of the liquid inlet runner plate are respectively communicated with the positive electrode electrolyte liquid inlet and the negative electrode electrolyte liquid inlet of the pole core group frame on the pole core group frame; the positive electrode liquid outlet and the negative electrode liquid outlet of the liquid outlet channel plate are respectively communicated with the positive electrode electrolyte liquid outlet of the pole core assembly frame and the negative electrode electrolyte liquid outlet of the pole core assembly frame on the pole core assembly frame; and when the electric pile works, electrolyte of the positive electrode and the negative electrode of the flow battery flows between the flow passage plate and the electrode core group, so that the normal operation of the charge and discharge process of the flow battery electric pile is ensured.
Further, the liquid inlet runner plate and the liquid outlet runner plate are respectively provided with positive/negative independent runners, the number of which is equal to that of the electrodes of the electrode core groups, the liquid inlet runner plate is provided with a positive liquid inlet sharing channel of the liquid inlet runner plate, a negative liquid inlet sharing channel of the liquid inlet runner plate, the liquid outlet runner plate is provided with a positive liquid outlet sharing channel of the liquid outlet runner plate, and a negative liquid outlet sharing channel of the liquid outlet runner plate;
The positive and negative independent flow channels of the liquid inlet flow channel plate are respectively communicated with the positive and negative liquid inlet sharing channels of the liquid inlet flow channel plate, the positive and negative independent flow channels of the liquid inlet flow channel plate are respectively communicated with the positive and negative liquid inlets of the liquid inlet flow channel plate, the positive and negative independent flow channels of the liquid outlet flow channel plate are respectively communicated with the positive and negative liquid outlet sharing channels of the liquid outlet flow channel plate, and the positive and negative independent flow channels of the liquid outlet flow channel plate are respectively communicated with the positive and negative liquid outlets of the liquid outlet flow channel plate, so that positive and negative electrolyte enters the positive and negative independent flow channels through the positive and negative liquid inlets of the liquid inlet flow channel plate, flows into the pole core group through the positive and negative liquid inlets of the liquid outlet flow channel plate, flows out of the pole core group through the positive and negative liquid outlets of the liquid outlet flow channel plate, and flows out of the galvanic pile through the positive and negative liquid outlet sharing channels of the liquid outlet flow channel plate.
Further, the electrode core group adopts a laminated structure, the single electrode core group consists of electrodes, a bipolar plate, an electrode core group frame, electrodes and a diaphragm, the bipolar plate is arranged in the middle of the electrode core group frame, each electrode is isolated by the bipolar plate and the diaphragm, the upper side surface and the lower side surface of the electrode core group frame are respectively provided with an anode electrolyte liquid outlet of the electrode core group frame, a cathode electrolyte liquid outlet of the electrode core group frame, an anode electrolyte liquid inlet of the electrode core group frame and a cathode electrolyte liquid inlet of the electrode core group frame; each electrode chamber is provided with a liquid inlet and a liquid outlet at corresponding positions, positive electrolyte and negative electrolyte respectively flow into different electrode chambers of the electrode core groups through different passage openings, and the positive electrolyte and the negative electrolyte are separated from each other through a diaphragm between the electrode core groups, so that liquid mixing does not occur between the electrode core groups.
Further, the installation holes (15) are formed in the liquid inlet runner plate (1) and the liquid outlet runner plate (2), when the integrated runner plate is installed on the pole core group, an electrolyte flow outlet and an electrolyte flow inlet of the runner plate are communicated with a liquid outlet and a liquid inlet on the pole core group frame, and sealing of the liquid outlet and the liquid inlet adopts an adhesive mode.
Furthermore, sealing of the liquid outlet and the liquid inlet adopts a sealing gasket crimping mode.
Further, the runner plate is made of nonmetallic materials and has insulativity.
Further, the runner plate is made of one or more of polypropylene, polyethylene, polyvinyl chloride, ABS, CPVC and ethylene propylene diene monomer rubber or modified polymer materials thereof.
Further, the membrane material is a cation type sulfonic acid ion exchange membrane, including but not limited to perfluorosulfonic acid ion exchange membrane, sulfonated polyether ether ketone ion exchange membrane, etc.
Further, the pole core frame is made of one or more of polypropylene, polyethylene, polyvinyl chloride, ABS, CPVC and ethylene propylene diene monomer rubber or modified polymer materials thereof; the electrode material is carbon electrode material, including but not limited to graphite, carbon felt, graphite felt, carbon cloth, carbon fiber, etc.
Further, the flow battery stack is used for an iron-chromium flow battery, an all-vanadium flow battery, a zinc-bromine flow battery, a zinc-iron flow battery, an all-iron flow battery, a zinc-nickel flow battery and an organic flow battery.
The beneficial effects of the invention are as follows:
The invention provides a galvanic pile with an integrated runner plate, which has the advantages that the structural design of the galvanic pile does not have complex runner sealing design, the use amount of a sealing ring is greatly reduced, the leakage risk of the galvanic pile is reduced, and meanwhile, the integrated runner plate design reduces the installation procedure, improves the installation efficiency and reduces the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described, the drawings in the description below are only embodiments of the present invention, and other drawings may be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an integrated flow channel plate stack according to embodiment 1 of the present invention;
FIG. 2 is an exploded view of an integrated flow field plate stack according to embodiment 1 of the present invention;
FIG. 3 is a diagram showing the positional relationship of the electrolyte inlet of the electrode core frame in the integrated flow channel plate stack structure according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of an integrated flow channel plate structure according to embodiment 1 of the present invention;
wherein, 1 is a liquid inlet runner plate, 11 is a runner plate positive electrode liquid inlet, 12 is a positive electrode liquid inlet sharing channel, 13 is a negative electrode liquid inlet sharing channel, 14 is a runner plate negative electrode liquid inlet, 15 is a mounting hole, 2 is a liquid outlet runner plate, 21 is a runner plate negative electrode liquid outlet, 22 is a negative electrode liquid outlet sharing channel, 23 is a positive electrode liquid outlet sharing channel, 24 is a runner plate positive electrode liquid outlet, 3 is an end plate, 4 is a pole core group, 41 is a diaphragm, 42 is an electrode one, 43 is a bipolar plate, 44 is a pole core group frame, 45 is an electrode two, 441 is a pole core group frame positive electrode electrolyte liquid outlet, 442 is a pole core group frame negative electrode electrolyte liquid outlet, 443 is a pole core group frame positive electrode electrolyte liquid inlet, 444 is a pole core group frame negative electrode electrolyte liquid inlet, and 5 is a collector.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
Example 1:
the directions of the upper, lower, front, rear, left and right described in the following text are defined according to the directions of fig. 1.
Referring to fig. 1, the galvanic pile with the integrated runner plate structure of the invention, as shown in fig. 1, consists of parts such as a liquid inlet runner plate 1, a liquid outlet runner plate 2, an end plate 3, a pole core group 4, a collector 5 and the like.
The liquid inlet flow channel plate 1 is arranged at the lower part of a pile structure as shown in fig. 1 and 2, the structure is shown in fig. 4, a plurality of groups of flow channel plate positive liquid inlet 11 and flow channel plate negative liquid inlet 14 are arranged at the bottom of the flow channel plate 1, and are respectively and symmetrically arranged at two sides of the bottom plate of the flow channel plate 1, and each liquid inlet corresponds to an independent flow channel;
The liquid inlet runner plate 1 and the liquid outlet runner plate 2 are respectively provided with positive/negative independent runners (not shown) with the same number as the electrodes of the electrode core groups, the liquid inlet runner plate is provided with a positive liquid inlet sharing channel 12 of the liquid inlet runner plate, a negative liquid inlet sharing channel 13 of the liquid inlet runner plate, and the liquid outlet runner plate 2 is arranged at the upper part of the galvanic pile structure as shown in fig. 1 and 2 and is identical to the liquid inlet runner plate 1 in structure as shown in fig. 4. The liquid outlet flow channel plate 2 is provided with a flow channel plate negative electrode liquid outlet 21, a flow channel plate positive electrode liquid outlet 24, an electrolyte negative electrode liquid outlet sharing channel 22 and an electrolyte positive electrode liquid outlet sharing channel 23.
The positive and negative independent flow channels of the liquid inlet flow channel plate are respectively communicated with the positive and negative liquid inlet sharing channels of the liquid inlet flow channel plate, the positive and negative independent flow channels of the liquid inlet flow channel plate are respectively communicated with the positive and negative liquid inlets of the liquid inlet flow channel plate, the positive and negative independent flow channels of the liquid outlet flow channel plate are respectively communicated with the positive and negative liquid outlet sharing channels of the liquid outlet flow channel plate, and the positive and negative independent flow channels of the liquid outlet flow channel plate are respectively communicated with the positive and negative liquid outlets of the liquid outlet flow channel plate, so that positive and negative electrolyte enters the positive and negative independent flow channels through the positive and negative liquid inlets of the liquid inlet flow channel plate, flows into the pole core group through the positive and negative liquid inlets of the liquid outlet flow channel plate, flows out of the pole core group through the positive and negative liquid outlets of the liquid outlet flow channel plate, and flows out of the galvanic pile through the positive and negative liquid outlet sharing channels of the liquid outlet flow channel plate.
Mounting holes 15 are formed in the left side and the right side of the runner plate and used for fixedly mounting the runner plate. The runner plate and the pole core group can be fixed by acid-resistant structural adhesive in butt joint.
As shown in fig. 3, the positions and the sizes of the negative electrode liquid inlet 14 and the positive electrode liquid inlet 11 on the liquid inlet flow channel plate 1 correspond to the positions and the sizes of the negative electrode electrolyte liquid inlet 444 of the electrode core group frame and the positive electrode electrolyte liquid inlet 443 of the electrode core group frame on the electrode core group 4, (wherein the positive electrolyte inlet 443 and the negative electrolyte inlet 444 of the pole core frame are overlapped with the positive electrolyte outlet 441 and the negative electrolyte outlet 442 of the pole core frame, which are shown in the figure, along the center of the pole core frame, by 180 degrees), and form one-to-one closed flow channels when assembled in a matching way. The positions and the sizes of the positive electrode liquid outlet 24 and the negative electrode liquid outlet 21 on the liquid outlet flow channel plate 2 correspond to the positive electrode electrolyte liquid outlet 441 and the negative electrode electrolyte liquid outlet 442 of the electrode core group frame on the electrode core group 4, and form one-to-one corresponding closed flow channels after being matched and assembled with the positive electrode liquid outlet and the negative electrode liquid outlet. The sealing of the liquid inlet and the liquid outlet on the flow passage plate and the pole core group can be realized by adopting an adhesive mode or a sealing gasket crimping mode.
The material of the liquid inlet runner plate and the liquid outlet runner plate is nonmetal material and has insulativity, and can be one or more of polypropylene, polyethylene, polyvinyl chloride, ABS, CPVC and ethylene propylene diene monomer rubber or modified polymer materials thereof.
The end plates 3 are divided into a front end plate and a rear end plate, and are respectively positioned on the front side and the rear side of the pole core group, and the pole core group is fixedly installed by applying normal force on the front end plate and the rear end plate. The end plate is provided with a liquid inlet pipe joint and a liquid outlet pipe joint, one end of the end plate is connected with an electrolyte sharing channel on the flow passage plate, and the other end of the end plate is connected with an external pipeline and a liquid storage tank.
The pole core group 4 is assembled by adopting a laminated structure, and a single pole core group structure is shown in fig. 2 and sequentially comprises a diaphragm 41, an electrode I42, a bipolar plate 43, a pole core group frame 44 and an electrode 45. The electrode core group frame is respectively provided with a plurality of electrolyte inlets and outlets, namely an anode electrolyte outlet 441 of the electrode core group frame and a cathode electrolyte outlet 442 of the electrode core group frame, and an anode electrolyte inlet 443 of the electrode core group frame and a cathode electrolyte inlet 444 of the electrode core group frame. The bipolar plate 43 is arranged in the middle of the pole core group frame 44, the first electrode 42 and the second electrode 45 are isolated by the bipolar plate and the diaphragm, an electrode chamber is formed between the diaphragm and the bipolar plate by a sealing structure, and a liquid inlet and a liquid outlet are arranged at corresponding positions of each electrode chamber. The bipolar plate 43 is provided with a positive electrode chamber and a negative electrode chamber on both sides, respectively, and is filled with a positive electrolyte and a negative electrolyte respectively, and the electrolytes react chemically in the electrode chambers during operation of the galvanic pile.
Referring to fig. 2, in operation of the stack, the flow path of the electrolyte of the positive electrode and the negative electrode of the flow battery is as follows:
The flow path and route of the positive electrolyte are as follows: the positive electrolyte flows into the positive electrolyte sharing channel 12 of the liquid inlet runner plate from the positive inflow pipe joint, reaches the positive electrolyte inlet 11 of the liquid inlet runner plate through the positive liquid inlet runner, enters the positive electrode chamber through the positive electrolyte inlet 443 on the electrode core group frame, flows out through the positive electrolyte outlet 441 on the electrode core group frame after flowing through the positive electrode chamber, enters the liquid outlet runner through the liquid outlet 24 of the liquid outlet runner plate, is converged to the positive electrolyte sharing channel 23 of the liquid outlet runner plate, and flows out to the positive electrolyte storage tank through the positive outflow pipe joint.
The flow path and the route of the negative electrode electrolyte are as follows: the negative electrolyte flows into the negative electrolyte sharing channel 13 of the liquid inlet runner plate from the negative inflow pipe joint, reaches the negative electrolyte inlet 14 of the liquid inlet runner plate through the negative liquid inlet runner, enters the negative electrode chamber through the negative electrolyte inlet 444 on the pole core group frame, flows out through the negative electrolyte outlet 442 on the pole core group frame after flowing through the negative electrode chamber, enters the liquid outlet runner through the liquid outlet 21 of the liquid outlet runner plate, is converged to the negative electrolyte sharing channel 22 of the liquid outlet runner plate, and flows out to the negative electrolyte storage tank through the negative outlet pipe joint.
The flow battery pile with the integrated flow channel plate structure can be applied to an iron-chromium flow battery, an all-vanadium flow battery, a zinc-bromine flow battery, a zinc-iron flow battery, an all-iron flow battery, a zinc-nickel flow battery, an organic flow battery and the like.
According to the size requirement of the pile capacity, different numbers of pole core groups are adopted for superposition assembly, 50 pole core groups are needed for lamination assembly by taking 50V10kw of the pile capacity of the iron-chromium flow battery as an example, and 50 groups of positive and negative electrolyte flow channels are correspondingly arranged on corresponding flow channel plates.
In summary, the invention discloses a flow battery stack with an integrated flow channel plate structure, which is composed of an integrated flow channel plate, an end plate, a pole core group, a collector and the like, wherein the integrated flow channel plate is divided into a liquid inlet flow channel plate and a liquid outlet flow channel plate, which are respectively arranged on the liquid inlet side and the liquid outlet side of the pole core group, an electrolyte flow outlet and an inlet are arranged on the flow channel plate, and the electrolyte flow outlet/inlet is communicated with the liquid outlet/inlet on the pole core group frame after the integrated flow channel plate and the pole core group are assembled, so that positive and negative electrolyte of a flow battery flows between the flow channel plate and the pole core group during operation of the stack, and normal operation of a charging and discharging process of the flow battery stack is ensured. The pile structure design has no complicated runner sealing design, greatly reduces the use amount of the sealing ring, reduces the leakage risk of the pile, reduces the installation procedure by the integrated runner plate design, improves the installation efficiency, reduces the cost and has excellent application and popularization prospects.
So far, those skilled in the art will recognize that while embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that are in accordance with the principles of the present invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the present invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
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| CN112838238A (en) * | 2019-11-25 | 2021-05-25 | 国家电投集团科学技术研究院有限公司 | Flow battery stack and heat insulation plate thereof |
| CN116815246A (en) * | 2023-07-04 | 2023-09-29 | 深圳市瑞麟科技有限公司 | Electrolytic tank for uniformly distributing electrolyte flow |
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| CN112838238A (en) * | 2019-11-25 | 2021-05-25 | 国家电投集团科学技术研究院有限公司 | Flow battery stack and heat insulation plate thereof |
| CN116815246A (en) * | 2023-07-04 | 2023-09-29 | 深圳市瑞麟科技有限公司 | Electrolytic tank for uniformly distributing electrolyte flow |
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