CN109841871A - A method of prevent flow cell pile from leaking electricity under standby electricity condition - Google Patents
A method of prevent flow cell pile from leaking electricity under standby electricity condition Download PDFInfo
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- CN109841871A CN109841871A CN201711213580.2A CN201711213580A CN109841871A CN 109841871 A CN109841871 A CN 109841871A CN 201711213580 A CN201711213580 A CN 201711213580A CN 109841871 A CN109841871 A CN 109841871A
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- sap cavity
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- valve
- pile
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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
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Abstract
The present invention discloses a kind of method for preventing flow cell pile from leaking electricity under standby electricity condition.It is connected again through pumping with anolyte liquid storage tank after valve is connected with a main line by the anode or electrolyte sap cavity import/export that are equipped with valve or 2 or more monocell on the main line respectively between the anode of adjacent single cells in flow cell pile perhaps electrolyte sap cavity import/export.This method can pile is fully charged and be in wait at any time instruction prepare electric discharge during cutting-off liquid flow battery stack inside electric network, prevent the generation of leakage current in pile, avoid pile for the electric leakage under electricity condition.
Description
Technical field
The present invention relates to the operation methods of flow battery, and be specifically designed flow cell pile prevents from leaking electricity under standby electricity condition
Method.
Background technique
Along with the in short supply of fossil energy, renewable energy is being increasingly becoming the leading energy.National governments whether exist
The grid-connected specific gravity of renewable energy is all classified as important indicator in short-term plan or long-term plan.But renewable energy, especially
It is wind energy, solar energy, and there is discontinuous, unstable output characteristics, direct grid-connected is easy to cause to impact to power grid.Therefore
Actually the grid-connected time is not long for wind energy, solar energy, and it is particularly evident that electrical phenomena is abandoned in abandonment.Renewable Energy Development in various countries is planned
And in smart grid development, development energy storage technology is all classified as to the necessary condition of Renewable Energy Development.Energy storage technology can divide
For physics energy storage and chemical energy storage, wherein physics energy storage mainly includes draw water energy storage, compressed air and flywheel energy storage.These skills
Art mainly have the shortcomings that geographical location limitation and it is inefficient.Chemical energy storage, especially flow battery energy storage technology are in recent years
Significant progress is achieved, gradually hundred megawatts of battery systems are developed to by the multikilowatt battery system in laboratory, it is preliminary to realize
Industrialization.The technology has high-efficient, environmental-friendly, the high advantage of cost performance in life cycle, is just showing vigorous life
Order power.
Flow battery system has the important application models such as smooth output, peak load shifting and tracking plan power generation.Usually
It needs to store electric energy after pile charges, that is, the standby electricity condition of system, then when needed discharges electric energy
It goes out.Therefore battery status and electrolysis liquid status of the battery system under standby electricity condition become extremely important.First for electricity condition
System-down is needed, electrolyte stops circulation, and static storage prevents the loss of electric energy in electrolyte storage tank to the full extent.
Secondly pile also requires to reduce electric leakage to the full extent, and improves the pile reliability under high charge state.Usual pile is
Be connected in series by tens batteries, internal circuit series connection, fluid path are in parallel, formed because of the electrolyte common line between battery in
The electric leakage network in portion.For the voltage of pile close to highest, electric leakage is serious under standby electricity condition.This phenomenon not only greatly lost
Electric energy, even more by this part, electric energy has been directly changed into thermal energy pile electrolyte inside temperature is promoted to rise sharply, and seriously affects battery material
The service life of material.
Summary of the invention
As the above analysis, energy storage battery system usually needs to wait system after fully charged the calling of load, should
State is known as standby electricity condition, and battery and electrolysis liquid status become extremely important at this time.And constitute the necessary item of pile internal electrical losses
Part is the respective common line of positive and negative electrode electrolyte and cell voltage.Only cutting loop of electric leakage can just avoid leaking electricity completely
The generation of electric current prevents inside pile because temperature caused by leakage current rises sharply.
To solve the above problems, the present invention provides a kind of electrolyte common line structures of flow cell pile.Using
The pile of the structure includes 2 or more the monocells successively overlapped from left to right, is equipped with bipolar plates, monocell between adjacent single cells
Anode including successively overlapping, the anolyte sap cavity with inlet and outlet, diaphragm, with the electrolyte of inlet and outlet
Sap cavity, cathode, have the following characteristics that
The anolyte sap cavity import of 2 or more monocells be successively parallel on same main line from left to right again through pump with
Anolyte liquid storage tank is connected, and valve is equipped on the main line between the anolyte sap cavity import of adjacent single cells；
Or the anolyte sap cavity import of 2 or more monocells is pumped again after valve is connected with a main line and anolyte liquid storage tank
It is connected；
The anolyte sap cavity outlet of 2 or more monocells be successively parallel on same main line from left to right again through pump with
Anolyte liquid storage tank is connected, and is equipped with valve on the main line between the outlet of the anolyte sap cavity of adjacent single cells；
Or the anolyte sap cavity of 2 or more monocells exports after valve is connected with a main line again through pump and anolyte liquid storage tank
It is connected；
The electrolyte sap cavity import of 2 or more monocells be successively parallel on same main line from left to right again through pump with
Cathode electrolyte storage tank is connected, and valve is equipped on the main line between the electrolyte sap cavity import of adjacent single cells；
Or the electrolyte sap cavity import of 2 or more monocells is pumped again after valve is connected with a main line and cathode electrolyte storage tank
It is connected；
The electrolyte sap cavity outlet of 2 or more monocells be successively parallel on same main line from left to right again through pump with
Cathode electrolyte storage tank is connected, and is equipped with valve on the main line between the outlet of the electrolyte sap cavity of adjacent single cells；
Or the electrolyte sap cavity of 2 or more monocells exports after valve is connected with a main line again through pump and cathode electrolyte storage tank
It is connected；
It is closed in standby electricity condition ShiShimonoseki and states all valves, all electrolyte loop of electric leakage can be cut off, thoroughly avoid electricity
The electric leakage of heap.
The present invention has the advantage that
1. the present invention thoroughly avoids battery system for the pile internal electrical losses under electricity condition, it is therefore prevented that because electric leakage will lead to
Temperature the problems such as rising sharply, improve the reliability of pile and material.
2. the configuration of the present invention is simple, at low cost, control system is easily operated, without expensive equipment investment.
Detailed description of the invention
Fig. 1 is flow cell pile fluid path figure；
Wherein 1. pile end plate；2. anode；3. cathode；4. example conductive membranes；5. bipolar plates；6. anode electrolyte entrance is public
Use pipeline；7. electrolyte liquid entrance common line；8. electrolyte liquid exports common line；9. anode electrolyte outlet is public
Pipeline；10. anode electrolyte entrance branch pipeline；11. electrolyte liquid entrance branch pipeline；12. anode electrolyte outlet point
Bye-pass；13. electrolyte liquid outlet branches pipeline.
Fig. 2 is the flow cell pile fluid path figure of comparative example 1 of the present invention；
Wherein 14. anode electrolyte entrance common line valve；15. electrolyte liquid entrance common line valve；16. just
Pole electrolyte outlet common line valve；17. electrolyte liquid exports common line valve.
Fig. 3 is the flow cell pile fluid path figure of comparative example 2 of the present invention；
Wherein 18. anode electrolyte entrance branch pipe valve；19. electrolyte liquid entrance branch pipe valve；20. just
Pole electrolyte outlet branch line valve；21. electrolyte liquid outlet branches pipe valve.
Fig. 4 is the flow cell pile fluid path figure of comparative example 3 of the present invention；
Specific embodiment
Embodiment 1
Comparative example:
Flow cell pile generallys use the fluid path layout of Fig. 1, i.e., positive and negative electrode electrolyte passes through entrance common line respectively
It flows into the entrance branch pipeline of each section monocell, flows into electrode, then converged into out by the outlet branches pipeline of each section monocell
In mouth common line, pile is flowed out.In the case where battery system is for electricity condition, pile possesses higher voltage, the electrolysis inside pile
Liquid branch line and common line have collectively constituted the leakage circuit in pile, and electricity is formed under the driving of pile cell voltage
Stream.
Using the flow cell pile fluid path layout in Fig. 2, only in the entrance and exit common line of positive and negative electrode electrolyte
Upper several valves of setting, are particularly located in the common line between each adjacent two branch line.
Using the flow cell pile fluid path layout in Fig. 3, only in the entrance and exit branch line of positive and negative electrode electrolyte
Upper several valves of setting, are particularly located between electrolyte entrance and outlet and common line.
Using the flow cell pile fluid path layout in Fig. 4, not only in the public pipe of entrance and exit of positive and negative electrode electrolyte
Several valves are arranged in road, while several valves also are arranged on the entrance and exit branch line of positive and negative electrode electrolyte.
When the standby electricity of battery system is shut down, valve is simultaneously closed off, and has interrupted the electrolyte penetrated through in common line in pile,
So that leakage circuit is breaking, the generation of leakage current is thoroughly avoided.
The electricity of pile of the comparison using Fig. 1 fluid path layout and the pile using the fluid path of Fig. 2,3,4 layout under standby electricity condition
Heap voltage, pile electrolyte inside temperature, as shown in table 1.Fall using the pile voltage of the fluid path of Fig. 2,3,4 layout is obvious
It reduces, stack temperature elevation amplitude is little.
Pile of the table 1 using Fig. 1 fluid path layout and the pile comparison using the fluid path of Fig. 2,3,4 layout
Claims (1)
1. a kind of method for preventing flow cell pile from leaking electricity under standby electricity condition, flow cell pile includes 2 or more from a left side
To the right monocell successively overlapped, bipolar plates are equipped between adjacent single cells, monocell includes the anode successively overlapped, with import
With the anolyte sap cavity, diaphragm, electrolyte sap cavity, cathode with inlet and outlet of outlet, it is characterised in that:
The anolyte sap cavity import of 2 or more monocells is successively parallel on same main line again from left to right through pump and anode
Electrolyte storage tank is connected, and valve is equipped on the main line between the anolyte sap cavity import of adjacent single cells；Or 2
The anolyte sap cavity import of the above monocell is connected through pumping with anolyte liquid storage tank again after valve is connected with a main line
It is logical；
The anolyte sap cavity outlet of 2 or more monocells is successively parallel on same main line again from left to right through pump and anode
Electrolyte storage tank is connected, and is equipped with valve on the main line between the outlet of the anolyte sap cavity of adjacent single cells；Or 2
The anolyte sap cavity of the above monocell is exported to be connected through pumping with anolyte liquid storage tank again after valve is connected with a main line
It is logical；
The electrolyte sap cavity import of 2 or more monocells is successively parallel on same main line again from left to right through pump and cathode
Electrolyte storage tank is connected, and valve is equipped on the main line between the electrolyte sap cavity import of adjacent single cells；Or 2
The electrolyte sap cavity import of the above monocell is connected through pumping with cathode electrolyte storage tank again after valve is connected with a main line
It is logical；
The electrolyte sap cavity outlet of 2 or more monocells is successively parallel on same main line again from left to right through pump and cathode
Electrolyte storage tank is connected, and is equipped with valve on the main line between the outlet of the electrolyte sap cavity of adjacent single cells；Or 2
The electrolyte sap cavity of the above monocell is exported to be connected through pumping with cathode electrolyte storage tank again after valve is connected with a main line
It is logical；
Above-mentioned all valves are turned off under standby electricity condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213580.2A CN109841871A (en) | 2017-11-28 | 2017-11-28 | A method of prevent flow cell pile from leaking electricity under standby electricity condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213580.2A CN109841871A (en) | 2017-11-28 | 2017-11-28 | A method of prevent flow cell pile from leaking electricity under standby electricity condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109841871A true CN109841871A (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711213580.2A Pending CN109841871A (en) | 2017-11-28 | 2017-11-28 | A method of prevent flow cell pile from leaking electricity under standby electricity condition |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148388A (en) * | 2010-02-10 | 2011-08-10 | 大连融科储能技术发展有限公司 | Redox flow battery system |
| CN103633347A (en) * | 2012-08-24 | 2014-03-12 | 崔骥 | Anti-creeping method for electrochemical facility containing flowing electrolyte and anti-creeper |
| JP2017082268A (en) * | 2015-10-26 | 2017-05-18 | 株式会社ギャラキシー | Cell stack set type electrolysis tank and cell stack set type battery |
-
2017
- 2017-11-28 CN CN201711213580.2A patent/CN109841871A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148388A (en) * | 2010-02-10 | 2011-08-10 | 大连融科储能技术发展有限公司 | Redox flow battery system |
| CN103633347A (en) * | 2012-08-24 | 2014-03-12 | 崔骥 | Anti-creeping method for electrochemical facility containing flowing electrolyte and anti-creeper |
| JP2017082268A (en) * | 2015-10-26 | 2017-05-18 | 株式会社ギャラキシー | Cell stack set type electrolysis tank and cell stack set type battery |
Non-Patent Citations (1)
| Title |
|---|
| 薛慧婷等: "（"全钒氧化还原液流电池漏电电流影响因素的研究"", 《东方汽轮机》 * |
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Application publication date: 20190604 |
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