CN112928294A - Flow battery galvanic pile - Google Patents
Flow battery galvanic pile Download PDFInfo
- Publication number
- CN112928294A CN112928294A CN201911239802.7A CN201911239802A CN112928294A CN 112928294 A CN112928294 A CN 112928294A CN 201911239802 A CN201911239802 A CN 201911239802A CN 112928294 A CN112928294 A CN 112928294A
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- CN
- China
- Prior art keywords
- liquid guide
- guide plate
- electrolyte
- pile
- positive
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01M8/02—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
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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
- H01M8/18—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
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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
- H01M8/2455—Grouping of fuel cells, e.g. stacking of fuel cells with liquid, solid or electrolyte-charged reactants
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- 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
Abstract
The invention relates to a flow battery pile, which comprises more than 2 battery packs connected in series in sequence according to the sequence of an anode end and a cathode end, wherein the anode end and the cathode end of the pile are respectively provided with a liquid guide plate, the surfaces of the side edges of the liquid guide plates are respectively provided with a blind hole used as a positive or negative electrolyte inlet channel and a blind hole used as a negative or positive electrolyte outlet channel, and the blind holes are respectively communicated with a positive or negative electrolyte public channel of the battery pack close to the surface of one side of the liquid guide plate. The pile liquid guide plate adopting the structure has the advantages of large quantity and heavy weight. By adopting the liquid guide plate of the flow battery pile, two adjacent liquid guide plates between the grouped battery packs in the pile are combined into a whole in the aspect of electrolyte organization function, and the thickness of the liquid guide plate is only the thickness of one liquid guide plate. Therefore, on a hundred kW electric pile, the number of the liquid guide plates is greatly reduced, and the volume of the electric pile is also obviously reduced.
Description
Technical Field
The invention relates to a flow battery stack, in particular to a liquid guide plate of the flow battery stack.
Background
The demand for energy is accelerated by the rapid development of economy, and the environmental pressure is increased by the excessive exploitation of the traditional fossil energy, so that the efficient utilization of renewable energy becomes a priority for developing energy in various countries. Renewable energy sources including wind energy, solar energy and the like have the problems of discontinuity, instability and poor adjustability. To realize the grid connection of renewable energy, the renewable energy needs to be converted into controllable, stable and continuous electric power, and therefore, an intermediate electric energy regulating device needs to be developed. Energy storage techniques have been developed, which include physical energy storage and chemical energy storage. Physical energy storage, including reservoirs, compressed air, etc., is greatly affected by environmental and geographical factors. Chemical energy storage, especially electrochemical energy storage, is rapidly developing. The introduction of various energy storage batteries provides a technical basis for the integration of energy storage systems. Among a plurality of energy storage batteries, the flow battery has considerable development potential due to the advantages of high safety, high life cycle cost performance, independent design of capacity and power, high efficiency and the like. The application of the kW-hundred MW energy storage demonstration system is realized, and the market prospect is wide.
Flow batteries, especially high power flow battery stacks, are the basic unit of system integration. The specification of the electric pile is from kW to hundred kW, and the number of battery sections is from dozens to hundreds. Therefore, the flowing organization of the electrolyte in the galvanic pile is the key for realizing high efficiency, high integration and high easy installation of the galvanic pile. To realize efficient series connection of hundreds of batteries, batteries are often grouped, connected in parallel on a liquid path and connected in series on a circuit. The whole can be broken into parts, the problem of electrolyte distribution of hundreds of batteries is reduced to the problem of electrolyte distribution of a group of dozens of batteries, and the design difficulty of the galvanic pile is reduced. Meanwhile, the reduced cell number is also beneficial to controlling the leakage loss inside the galvanic pile and improving the efficiency. The component that groups the cells without affecting the stack assembly is a fluid conducting plate. The electrolyte flow is organized, the number of inlets and outlets of a liquid path of the galvanic pile is reduced, and the integration difficulty of the galvanic pile on a system is reduced. Generally, a series battery requires a liquid guide plate at each of the positive and negative ends. If one galvanic pile is divided into two groups of battery packs, 4 liquid guide plates are needed; the grouping into three groups of battery packs needs 6 liquid guide plates, and so on. The diameter of an electrolyte pipeline in the liquid guide plate is designed according to the flow rate of the electrolyte required by each group of battery packs, and the thickness of each liquid guide plate is further determined. Generally, the thickness of the liquid guide plate is between 20mm and 60 mm. Therefore, the thickness and the weight of the electric pile are obviously increased by the added liquid guide plate, and the mass power density of the electric pile is reduced. Simplifying and slimming the liquid guide plate are the key points of hundred kW electric pile design integration.
Disclosure of Invention
In order to simplify the liquid guide plates, the number of the liquid guide plates in the galvanic pile is reduced, and the overall thickness and quality of the galvanic pile are reduced. The invention provides a flow battery pile, which comprises more than 2 battery packs connected in series in sequence according to the sequence of an anode end and a cathode end, wherein the anode end and the cathode end of the pile are respectively provided with a liquid guide plate, the surfaces of the side edges of the liquid guide plates are respectively provided with a blind hole used as a positive or negative electrolyte inlet channel and a blind hole used as a negative or positive electrolyte outlet channel, and the blind holes are respectively communicated with a positive or negative electrolyte common channel of the battery pack close to the surface of one side of the liquid guide plate.
In the flow battery pile, a liquid guide plate is arranged between adjacent battery packs. The surface of the side edge of the liquid guide plate between adjacent battery packs is respectively provided with a blind hole serving as an anode electrolyte inlet channel, a blind hole serving as an anode electrolyte outlet channel, a blind hole serving as a cathode electrolyte inlet channel and a blind hole serving as a cathode electrolyte outlet channel, and the blind holes are respectively communicated with corresponding positive or negative electrolyte public channels close to the battery packs on the two side surfaces of the liquid guide plate.
The liquid guide plate in the flow cell stack is a square flat plate, all blind holes in the liquid guide plate are formed in the surface of one side edge of the liquid guide plate, and electrolyte inlets and electrolyte outlets, communicated with the common channel, of the blind holes are located on the surface of a plate body of the liquid guide plate.
The invention has the following advantages:
1. the invention combines two adjacent liquid guide plates between the grouped battery packs in the galvanic pile into a whole in the electrolyte organization function, and the thickness of the liquid guide plate is kept to be the same as that of one liquid guide plate. When the hundred kW electric pile is assembled, the volume of the electric pile can be obviously reduced
2. The liquid guide plate has a simple structure, is easy to process, and does not change the original assembly process of the galvanic pile.
Drawings
FIG. 1 shows the shape and arrangement of liquid guide plates in a conventional flow cell stack;
wherein 1, a liquid guide plate A; 2. a liquid guide plate B; 3. a positive electrolyte inlet in the liquid guide plate A; 4. an anode electrolyte outlet in the liquid guide plate B; 5. a cathode electrolyte inlet in the liquid guide plate B; 6. a cathode electrolyte outlet in the liquid guide plate A;
fig. 2 is a liquid guide plate a in the electric pile of fig. 1:
a runner port communicated with an electrolyte outlet of the adjacent battery cathode electrode frame is formed in the liquid guide plate A; 8. the runner port is communicated with the electrolyte inlet of the anode electrode frame of the adjacent battery on the liquid guide plate A;
FIG. 3 is a cross-sectional view of the fluid conducting plate A of FIG. 2 at the center of the thickness;
fig. 4 is a liquid guide plate B in the stack of fig. 1:
9, a runner port communicated with an electrolyte outlet of an adjacent battery positive electrode frame is formed in the liquid guide plate B; 10. the runner port is communicated with the electrolyte inlet of the adjacent battery cathode electrode frame on the liquid guide plate B;
FIG. 5 is a cross-sectional view of drainage plate B of FIG. 4 at the center of the thickness;
fig. 6 is a front side of a liquid guide plate of a flow battery stack according to the present invention;
fig. 7 is a back surface of a liquid guide plate of a flow battery stack according to the present invention;
fig. 8 is a cross-sectional view of the center thickness of a liquid guide plate of a flow battery stack according to the present invention (front view of the liquid guide plate);
fig. 9 is a cross-sectional view of the center thickness of a liquid guide plate of a flow battery cell stack according to the present invention (a back view of the liquid guide plate).
Detailed Description
Example (b):
fig. 1 shows a conventional flow battery high-power stack, in which the batteries of the whole stack are divided into two groups, and each group uses a liquid guide plate a (fig. 2 and 3) and a liquid guide plate B (fig. 4 and 5) as tissue parts for inflow and outflow of positive and negative electrolyte. The positive electrolyte flows into the positive electrode of each battery through a positive electrolyte inlet in the liquid guide plate A3, is collected and then flows out of the electric pile through a positive electrolyte outlet in the liquid guide plate B4; and the negative electrolyte flows into the negative electrode of each battery through a negative electrolyte inlet in the liquid guide plate B5, is collected and then flows out of the pile through a negative electrolyte outlet in the liquid guide plate A6. Wherein, the cathode electrolyte outlet in the liquid guide plate A6 is communicated with the electrolyte outlet on the liquid guide plate A7, which is communicated with the electrolyte outlet of the cathode electrode frame of the adjacent battery; 3, a flow passage port communicated with the electrolyte inlet of the anode electrode frame of the adjacent battery on the liquid guide plate A and the liquid guide plate 8; a flow passage port which is communicated with the electrolyte outlet of the anode electrode frame of the adjacent battery on the liquid guide plate B is formed between the anode electrolyte outlet in the liquid guide plate B and the electrolyte outlet of the cathode electrode frame of the adjacent battery on the liquid guide plate B9; and a cathode electrolyte inlet in the liquid guide plate B5 is communicated with a runner port communicated with an electrolyte inlet of the adjacent battery cathode electrode frame on the liquid guide plate B10 through a pipeline in the liquid guide plate. As can be seen from the figure, the adjacent positions of the two groups of cells are the liquid guide plate A and the liquid guide plate B, the thicknesses of the two groups of cells are both 50mm, and the thickness of the whole electric pile is increased.
Fig. 6 and 7 are liquid guide plates of a flow battery cell stack according to the present invention. As is apparent from the sectional views of fig. 8 and 9, the liquid guide plate according to the present invention has a structure in which the liquid guide plate a and the liquid guide plate B are fused. A positive electrolyte inlet in a liquid guide plate A of 3 on the side surface of the liquid guide plate A, a negative electrolyte outlet in a liquid guide plate A of 6, a positive electrolyte outlet in a liquid guide plate B of 4 on the liquid guide plate B, and a negative electrolyte inlet in a liquid guide plate B of 5 are all arranged on the side surface of the liquid guide plate provided by the invention. Wherein, the cathode electrolyte outlet in the liquid guide plate A6 is communicated with the electrolyte outlet on the liquid guide plate A7, which is communicated with the electrolyte outlet of the cathode electrode frame of the adjacent battery; 3, a flow passage port communicated with the electrolyte inlet of the anode electrode frame of the adjacent battery on the liquid guide plate A and the liquid guide plate 8; a flow passage port which is communicated with the electrolyte outlet of the anode electrode frame of the adjacent battery on the liquid guide plate B is formed between the anode electrolyte outlet in the liquid guide plate B and the electrolyte outlet of the cathode electrode frame of the adjacent battery on the liquid guide plate B9; and a flow passage port of the liquid guide plate B, which is communicated with the electrolyte inlet of the adjacent battery cathode electrode frame, of the liquid guide plate B is still communicated through a pipeline in the liquid guide plate B, wherein the cathode electrolyte inlet of the liquid guide plate B is 5. The liquid guide plate provided by the invention can be used for replacing the adjacent liquid guide plate A and the liquid guide plate B, and the thickness of the galvanic pile is reduced by 50 mm.
The electric pile batteries in the figure 1 are equally divided into n groups, and the liquid guide plates provided by the invention can be used for replacing n-1 groups of liquid guide plates A and B. And the thickness of the liquid guide plate is d, and the reduced thickness of the electric pile is d (n-1).
Claims (2)
1. A flow battery pile comprises more than 2 battery packs which are sequentially connected in series according to an anode end and a cathode end in an alternating sequence, wherein the anode end and the cathode end of the pile are respectively provided with a liquid guide plate, the surfaces of the side edges of the liquid guide plates are respectively provided with a blind hole serving as a positive or negative electrolyte inlet channel and a blind hole serving as a negative or positive electrolyte outlet channel, and the blind holes are respectively communicated with a positive or negative electrolyte public channel of the battery pack close to the surface of one side of the liquid guide plate;
the method is characterized in that:
a liquid guide plate is arranged between the adjacent battery packs; the surface of the side edge of the liquid guide plate between adjacent battery packs is respectively provided with a blind hole serving as an anode electrolyte inlet channel, a blind hole serving as an anode electrolyte outlet channel, a blind hole serving as a cathode electrolyte inlet channel and a blind hole serving as a cathode electrolyte outlet channel, and the blind holes are respectively communicated with corresponding positive or negative electrolyte public channels close to the battery packs on the two side surfaces of the liquid guide plate.
2. The flow cell stack of claim 1, wherein: the liquid guide plate is a square flat plate, all blind holes in the liquid guide plate are formed in the surface of one side edge of the liquid guide plate, and electrolyte inlets and electrolyte outlets communicated with the common channel are formed in the surface of the plate body of the liquid guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239802.7A CN112928294A (en) | 2019-12-06 | 2019-12-06 | Flow battery galvanic pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239802.7A CN112928294A (en) | 2019-12-06 | 2019-12-06 | Flow battery galvanic pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112928294A true CN112928294A (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911239802.7A Pending CN112928294A (en) | 2019-12-06 | 2019-12-06 | Flow battery galvanic pile |
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| Country | Link |
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| CN (1) | CN112928294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335652A (en) * | 2021-12-14 | 2022-04-12 | 中国电子科技集团公司第十八研究所 | Replaceable battery pile simulator |
| CN116979116A (en) * | 2023-09-22 | 2023-10-31 | 艾博特瑞能源科技(苏州)有限公司 | Flow battery pile and flow battery |
-
2019
- 2019-12-06 CN CN201911239802.7A patent/CN112928294A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335652A (en) * | 2021-12-14 | 2022-04-12 | 中国电子科技集团公司第十八研究所 | Replaceable battery pile simulator |
| CN116979116A (en) * | 2023-09-22 | 2023-10-31 | 艾博特瑞能源科技(苏州)有限公司 | Flow battery pile and flow battery |
| CN116979116B (en) * | 2023-09-22 | 2024-01-09 | 艾博特瑞能源科技(苏州)有限公司 | Flow battery pile and flow battery |
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