CN105514459A - Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof - Google Patents
Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof Download PDFInfo
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- CN105514459A CN105514459A CN201410495737.5A CN201410495737A CN105514459A CN 105514459 A CN105514459 A CN 105514459A CN 201410495737 A CN201410495737 A CN 201410495737A CN 105514459 A CN105514459 A CN 105514459A
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Abstract
The invention provides a mono-trapezoid flow battery, a poly-trapezoid flow battery and an electric pile thereof. Both a cathode porous electrode and an anode porous electrode in the mono-trapezoid flow battery are trapezoidal plate electrodes and are respectively arranged inside a cathode electrolyte flow frame and an anode electrolyte flow frame. On the cathode electrolyte flow frame and the anode electrolyte flow frame, two electrolyte inlet flow paths are arranged nearby the lower bottom edges respectively of the cathode porous electrode and the anode porous electrode, and two electrolyte outlet flow paths are arranged nearby the upper bottom edges respectively of the cathode porous electrode and the anode porous electrode. The electrolyte flows into the cathode porous electrode through the lower bottom edges of the cathode porous electrode and the anode porous electrode and then flows out from the upper bottom edges of the cathode porous electrode and the anode porous electrode. The trapezoid flow battery is reduced in concentration polarization at certain degree and further is reduced in voltage loss, and meanwhile, is improved in utilization efficiency of the electrolyte and is increased in total efficiency.
Description
Technical field
The present invention relates to flow battery field, in particular to a kind of single trapezoidal liquid flow battery of one, many trapezoidal liquid flows battery and pile thereof.
Background technology
Existing flow battery, superimposed and be assembled according to end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, end plate successively order, flow cell pile is in series by the above flow battery of two joints.Both positive and negative polarity porous electrode is wherein rectangle, and electrolyte flows in one end of rectangle, and the other end of rectangle flows out with the speed being similar to import department.The simultaneous electrochemical reaction in electrode is flowed at electrolyte, under close flow velocity, reactant concentration will be reduced to outlet gradually by import, cause import and export reactant concentration gradient, cause the reaction of electrolyte in battery uneven, cause concentration polarization and the loss of voltage, and then affect battery efficiency.
Summary of the invention
A kind of single trapezoidal battery, comprise order is superimposed successively end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, end plate, it is characterized in that: described positive pole porous electrode and negative pole porous electrode are trapezoidal plate electrode;
Positive pole porous electrode is placed in positive pole liquid flow frame, electrolyte feed liquor runner is provided with on positive pole liquid flow frame, near side, positive pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, positive pole porous electrode trapezoidal upper base, electrolyte flows out from side, positive pole porous electrode trapezoidal upper base after positive pole porous electrode from positive pole porous electrode trapezoidal bottom one side inflow;
Negative pole porous electrode is placed in negative pole liquid flow frame, electrolyte feed liquor runner is provided with on negative pole liquid flow frame, near side, negative pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, negative pole porous electrode trapezoidal upper base, electrolyte flows out from side, negative pole porous electrode trapezoidal upper base after negative pole porous electrode from negative pole porous electrode trapezoidal bottom one side inflow.
The how trapezoidal battery of one, comprise superimposed end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, the end plate of order successively, it is characterized in that: described positive pole porous electrode and negative pole porous electrode are by the trapezoidal plate electrode formation of more than two;
The positive pole porous electrode of more than two is laid in positive pole liquid flow frame by order from left to right successively, and be provided with the baffle plate preventing electrolyte crossfire between adjacent positive porous electrode, and odd number positive pole porous electrode bottom is from left to right placed downwards, even numbers positive pole porous electrode bottom is upwards placed; Electrolyte feed liquor runner is provided with on positive pole liquid flow frame, near side, positive pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, positive pole porous electrode trapezoidal upper base, electrolyte flows out from side, positive pole porous electrode trapezoidal upper base after positive pole porous electrode from positive pole porous electrode trapezoidal bottom one side inflow;
The negative pole porous electrode of more than two is laid in negative pole liquid flow frame by order from left to right successively, and be provided with the baffle plate preventing electrolyte crossfire between adjacent cathode porous electrode between adjacent cathode porous electrode, and odd number negative pole porous electrode bottom is from left to right placed downwards, even numbers negative pole porous electrode bottom is upwards placed; Electrolyte feed liquor runner is provided with on negative pole liquid flow frame, near side, negative pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, negative pole porous electrode trapezoidal upper base, electrolyte flows out from side, negative pole porous electrode trapezoidal upper base after negative pole porous electrode from negative pole porous electrode trapezoidal bottom one side inflow.
The pile that the trapezoidal battery of list and/or how trapezoidal battery are formed, it is formed by the above above-mentioned trapezoidal serial battery of two joints;
Comprise order is superimposed successively end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode ..., (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, end plate.Wherein: " ... " place represents: (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode are repetitive.
Advantageous Effects and innovation point
Anode electrolyte and electrolyte liquid all flow into (single/many) trapezoidal liquid flow battery by respective electrolyte inlet with certain flow, and carry out electrochemical reaction, after having reacted, are flowed out by respective electrolyte outlet.Because (single/many) trapezoidal liquid flow cell inlet cross-sectional area is large compared with exit cross-sectional area, the electrolyte flow rate of import department is little compared with exit.Utilize above-mentioned (single/many) trapezoidal liquid flow battery charging and discharging, electrolyte enters (single/many) trapezoidal liquid flow battery with less flow velocity, along with the carrying out of reaction, reactant concentration reduces gradually, but because the conversion zone of (single/many) trapezoidal liquid flow battery is reduced to outlet gradually by import, the required reacting dose participating in reaction also reduces thereupon, and flow of electrolyte is certain, increased gradually by the flow velocity of import to outlet, improve the delivery rate of reaction mass, the reacting dose needed for nearly outlet can be supplemented in time, therefore the reaction uniformity in battery can be improved, reduce concentration polarization in battery, improve battery efficiency.
Liquid feeding end actual internal area is large, and outlet end actual internal area is little; Under the condition of same traffic, feed liquor speed is little, fluid speed is large, can overcome by inlet concentration of electrolyte high, the shortcoming that the low concentration gradient caused of liquid outlet concentration of electrolyte is large, improve liquid in-out mouth concentration of electrolyte uniformity, reduce concentration polarization, improve cell voltage efficiency, increase the electrolyte discharge and recharge time, improve electrolyte utilance, improve battery energy density; And then reduce battery system cost.
Accompanying drawing explanation
The both positive and negative polarity liquid flow frame schematic diagram of the mono-trapezoidal battery of Fig. 1;
The both positive and negative polarity liquid flow frame schematic diagram of Fig. 2 how trapezoidal (2 trapezoidal is example) battery;
How trapezoidal (2 trapezoidal the is example) battery of Fig. 3 and pile assemble schematic diagram.
Symbol description
The trapezoidal positive pole liquid flow frame-1 of original, anode electrode puts district-4, positive pole inlet-5, positive pole feed liquor water conservancy diversion runner-6, positive pole fluid water conservancy diversion runner-7, positive pole liquid outlet-8, single trapezoidal negative pole liquid flow frame-3, negative electrode puts district-9, negative pole inlet-10, negative pole feed liquor water conservancy diversion runner-11, negative pole fluid water conservancy diversion runner-12, negative pole liquid outlet-13, how trapezoidal positive pole liquid flow frame-14, anode electrode puts district 1-15, anode electrode puts district 2-16, how trapezoidal positive pole inlet-17, 18, how trapezoidal positive pole feed liquor water conservancy diversion runner-19, 20, how trapezoidal positive pole fluid water conservancy diversion runner-21, 22, how trapezoidal positive pole liquid outlet-23, 24, how trapezoidal negative pole liquid flow frame-15, negative electrode puts district 1-33, negative electrode puts district 2-34, how trapezoidal negative pole inlet-25, 26, how trapezoidal negative pole feed liquor water conservancy diversion runner-27, 28, how trapezoidal negative pole fluid water conservancy diversion runner-29, 30, how trapezoidal negative pole liquid outlet-31, 32, anode electrode-35, negative electrode-36, bipolar plates-37.
Embodiment
According to Fig. 1, for single trapezoidal liquid flow battery:
The anode electrode that positive pole porous electrode is placed in single trapezoidal positive pole liquid flow frame-1 is put in district-4, on single trapezoidal positive pole liquid flow frame-1, be provided with anode electrolyte feed liquor runner near the trapezoidal bottom of anode electrode (long limit) side, anode electrolyte feed liquor runner comprises positive pole inlet-5 and positive pole feed liquor water conservancy diversion runner-6; Be provided with anode electrolyte fluid runner near anode electrode trapezoidal upper base (minor face) side, anode electrolyte fluid runner comprises positive pole fluid water conservancy diversion runner-7 and positive pole liquid outlet-8; Anode electrolyte flows into from positive pole inlet-5, and flow to porous electrode through positive pole feed liquor water conservancy diversion runner-6, be collected to positive pole liquid outlet-8 by the electrolyte of porous electrode through positive pole fluid water conservancy diversion runner-7, anode electrolyte is flowed out by positive pole liquid outlet-8.
The negative electrode that negative pole porous electrode is placed in single trapezoidal negative pole liquid flow frame-3 is put in district-9, on single trapezoidal negative pole liquid flow frame-3, be provided with electrolyte liquid feed liquor runner near the trapezoidal bottom of negative electrode (long limit) side, electrolyte liquid feed liquor runner comprises negative pole inlet-10 and negative pole feed liquor water conservancy diversion runner-11; Be provided with electrolyte liquid fluid runner near negative electrode trapezoidal upper base (minor face) side, electrolyte liquid fluid runner comprises negative pole fluid water conservancy diversion runner-12 and negative pole liquid outlet-13; Electrolyte liquid flows into from negative pole inlet-10, and flow to porous electrode through negative pole feed liquor water conservancy diversion runner-11, be collected to negative pole liquid outlet-13 by the electrolyte of porous electrode through negative pole fluid water conservancy diversion runner-12, electrolyte liquid is flowed out by negative pole liquid outlet-13.
Anode electrolyte and electrolyte liquid all flow into single trapezoidal liquid flow battery by respective inlet (5 and 10) with certain flow, and carry out electrochemical reaction, after having reacted, are flowed out by respective liquid outlet (8 and 13).Because the import cross-sectional area in single trapezoidal liquid flow battery electrode district is large compared with exit cross-sectional area, the electrolyte flow rate of import section is little compared with outlet place.Utilize above-mentioned single trapezoidal liquid flow battery charging and discharging, electrolyte enters single trapezoidal liquid flow battery with less flow velocity in electrode district, along with the carrying out of reaction, reactant concentration reduces gradually, but because the conversion zone (electrode district) of single trapezoidal liquid flow battery is reduced to outlet gradually by import cross section, the required reacting dose participating in reaction also reduces thereupon, and flow of electrolyte is certain, increased gradually by the flow velocity of import cross section to outlet, improve the delivery rate of reaction mass, the reacting dose needed for nearly outlet can be supplemented in time, therefore the reaction uniformity in battery can be improved, reduce concentration polarization in battery, improve battery efficiency.
According to Fig. 2, for how trapezoidal (2 are trapezoidal) flow battery:
The anode electrode that positive pole porous electrode is placed in how trapezoidal positive pole liquid flow frame-14 is put in district 1-15 and anode electrode storing district 2-16, on how trapezoidal positive pole liquid flow frame-14, near each trapezoidal bottom of anode electrode (long limit) side, be provided with anode electrolyte feed liquor runner, anode electrolyte feed liquor runner comprises how trapezoidal positive pole inlet-17,18 and how trapezoidal positive pole feed liquor water conservancy diversion runner-19,20; Be provided with anode electrolyte fluid runner near each trapezoidal upper base (minor face) side of anode electrode, anode electrolyte fluid runner comprises how trapezoidal positive pole fluid water conservancy diversion runner-21,22 and how trapezoidal positive pole liquid outlet-23,24; Anode electrolyte flows into from how trapezoidal positive pole inlet-17,18, porous electrode is flow to through how trapezoidal positive pole feed liquor water conservancy diversion runner-19,20, be collected to how trapezoidal positive pole liquid outlet-23,24 by the electrolyte of porous electrode through how trapezoidal positive pole fluid water conservancy diversion runner-21,22, anode electrolyte is flowed out by how trapezoidal positive pole liquid outlet-23,24.
The negative electrode that negative pole porous electrode is placed in how trapezoidal negative pole liquid flow frame-15 is put in district 1-33 and negative electrode storing district 2-34, on how trapezoidal negative pole liquid flow frame-15, near each trapezoidal bottom of negative electrode (long limit) side, be provided with electrolyte liquid feed liquor runner, electrolyte liquid feed liquor runner comprises how trapezoidal negative pole inlet-25,26 and how trapezoidal negative pole feed liquor water conservancy diversion runner-27,28; Be provided with electrolyte liquid fluid runner near each trapezoidal upper base (minor face) side of negative electrode, electrolyte liquid fluid runner comprises how trapezoidal negative pole fluid water conservancy diversion runner-29,30 and how trapezoidal negative pole liquid outlet-31,32; Electrolyte liquid flows into from how trapezoidal negative pole inlet-25,26, porous electrode is flow to through how trapezoidal negative pole feed liquor water conservancy diversion runner-27,28, be collected to how trapezoidal negative pole liquid outlet-31,32 by the electrolyte of porous electrode through how trapezoidal negative pole fluid water conservancy diversion runner-29,30, electrolyte liquid is flowed out by how trapezoidal negative pole liquid outlet-31,32.
Anode electrolyte and electrolyte liquid all flow into many trapezoidal liquid flows battery by respective inlet (17,18 and 25,26) with certain flow, and carry out electrochemical reaction, after having reacted, flowed out by respective liquid outlet (23,24 and 31,32).Because the import cross-sectional area in many trapezoidal liquid flows battery electrode district is large compared with exit cross-sectional area, the electrolyte flow rate of import section is little compared with outlet place.Utilize above-mentioned many trapezoidal liquid flows battery charging and discharging, electrolyte enters many trapezoidal liquid flows battery with less flow velocity in electrode district, along with the carrying out of reaction, reactant concentration reduces gradually, but because the conversion zone (electrode district) of many trapezoidal liquid flows battery is reduced to outlet gradually by import cross section, the required reacting dose participating in reaction also reduces thereupon, and flow of electrolyte is certain, increased gradually by the flow velocity of import cross section to outlet, improve the delivery rate of reaction mass, the reacting dose needed for nearly outlet can be supplemented in time, therefore the reaction uniformity in battery can be improved, reduce concentration polarization in battery, improve battery efficiency.
According to Fig. 3, many trapezoidal liquid flows battery pile is formed by stacking by multiple above-mentioned list/many trapezoidal liquid flows battery, electrolyte circulation style is on the whole identical with traditional flow cell pile, and the electrolyte circulation mode in monocell is identical with the electrolyte circulation mode in above-mentioned list/many trapezoidal liquid flows battery.
Claims (3)
1. a single trapezoidal liquid flow battery, comprise order is superimposed successively end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, end plate, it is characterized in that: described positive pole porous electrode and negative pole porous electrode are trapezoidal plate electrode;
Positive pole porous electrode is placed in positive pole liquid flow frame, electrolyte feed liquor runner is provided with on positive pole liquid flow frame, near side, positive pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, positive pole porous electrode trapezoidal upper base, electrolyte flows out from side, positive pole porous electrode trapezoidal upper base after positive pole porous electrode from positive pole porous electrode trapezoidal bottom one side inflow;
Negative pole porous electrode is placed in negative pole liquid flow frame, electrolyte feed liquor runner is provided with on negative pole liquid flow frame, near side, negative pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, negative pole porous electrode trapezoidal upper base, electrolyte flows out from side, negative pole porous electrode trapezoidal upper base after negative pole porous electrode from negative pole porous electrode trapezoidal bottom one side inflow.
2. trapezoidal liquid flow battery more than a kind, comprise superimposed end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, the end plate of order successively, it is characterized in that: described positive pole porous electrode and negative pole porous electrode are by the trapezoidal plate electrode formation of more than two;
The positive pole porous electrode of more than two is laid in positive pole liquid flow frame by order from left to right successively, and be provided with the baffle plate preventing electrolyte crossfire between adjacent positive porous electrode, and odd number positive pole porous electrode bottom is from left to right placed downwards, even numbers positive pole porous electrode bottom is upwards placed; Electrolyte feed liquor runner is provided with on positive pole liquid flow frame, near side, positive pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, positive pole porous electrode trapezoidal upper base, electrolyte flows out from side, positive pole porous electrode trapezoidal upper base after positive pole porous electrode from positive pole porous electrode trapezoidal bottom one side inflow;
The negative pole porous electrode of more than two is laid in negative pole liquid flow frame by order from left to right successively, and be provided with the baffle plate preventing electrolyte crossfire between adjacent cathode porous electrode between adjacent cathode porous electrode, and odd number negative pole porous electrode bottom is from left to right placed downwards, even numbers negative pole porous electrode bottom is upwards placed; Electrolyte feed liquor runner is provided with on negative pole liquid flow frame, near side, negative pole porous electrode trapezoidal bottom, be provided with electrolyte fluid runner near side, negative pole porous electrode trapezoidal upper base, electrolyte flows out from side, negative pole porous electrode trapezoidal upper base after negative pole porous electrode from negative pole porous electrode trapezoidal bottom one side inflow.
3. a pile for single trapezoidal liquid flow battery and/or many trapezoidal liquid flows battery formation, it is formed by the trapezoidal serial battery in the two above claims 1 of joint and/or claim 2;
Comprise order is superimposed successively end plate, collector plate, (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode ..., (two) pole plate, positive pole porous electrode, positive pole liquid flow frame, amberplex, negative pole liquid flow frame, negative pole porous electrode, (two) pole plate, collector plate, end plate.
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| CN106876745A (en) * | 2015-12-12 | 2017-06-20 | 中国科学院大连化学物理研究所 | A kind of flow battery bipolar plates containing speed change runner |
| CN108539258A (en) * | 2018-05-08 | 2018-09-14 | 中国电力科学研究院有限公司 | A kind of trapezoidal ion battery and preparation method thereof |
| CN108598543A (en) * | 2018-06-27 | 2018-09-28 | 西安交通大学 | A kind of flow battery |
| CN109037725A (en) * | 2018-06-20 | 2018-12-18 | 浙江大学 | A kind of flow battery improving electrolyte distributing homogeneity and electrode structure and method |
| CN109786783A (en) * | 2019-01-26 | 2019-05-21 | 杭州德海艾科能源科技有限公司 | A kind of flow battery electrode frame of multi-cavity structure and its battery stack of composition |
| CN109841867A (en) * | 2017-11-28 | 2019-06-04 | 中国科学院大连化学物理研究所 | A kind of liquid flow frame suitable for trapezoidal liquid flow battery stack |
| CN109841866A (en) * | 2017-11-28 | 2019-06-04 | 中国科学院大连化学物理研究所 | A kind of liquid flow frame suitable for trapezoidal liquid flow battery |
| CN109841873A (en) * | 2017-11-28 | 2019-06-04 | 中国科学院大连化学物理研究所 | A kind of liquid flow frame suitable for flow cell pile |
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| CN106876745A (en) * | 2015-12-12 | 2017-06-20 | 中国科学院大连化学物理研究所 | A kind of flow battery bipolar plates containing speed change runner |
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| CN109841873B (en) * | 2017-11-28 | 2024-05-10 | 中国科学院大连化学物理研究所 | Liquid flow frame suitable for flow battery pile |
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| CN109037725A (en) * | 2018-06-20 | 2018-12-18 | 浙江大学 | A kind of flow battery improving electrolyte distributing homogeneity and electrode structure and method |
| CN109037725B (en) * | 2018-06-20 | 2023-06-02 | 浙江大学 | Flow battery capable of improving distribution uniformity of electrolyte, electrode structure and method |
| CN108598543A (en) * | 2018-06-27 | 2018-09-28 | 西安交通大学 | A kind of flow battery |
| CN109786783B (en) * | 2019-01-26 | 2023-04-25 | 杭州德海艾科能源科技有限公司 | Electrode frame for flow battery with multi-cavity structure and battery stack formed by electrode frame |
| CN109786783A (en) * | 2019-01-26 | 2019-05-21 | 杭州德海艾科能源科技有限公司 | A kind of flow battery electrode frame of multi-cavity structure and its battery stack of composition |
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