CN113540619A - Water cooling system of energy storage system of thermal power plant and working method - Google Patents
Water cooling system of energy storage system of thermal power plant and working method Download PDFInfo
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- CN113540619A CN113540619A CN202110921289.0A CN202110921289A CN113540619A CN 113540619 A CN113540619 A CN 113540619A CN 202110921289 A CN202110921289 A CN 202110921289A CN 113540619 A CN113540619 A CN 113540619A
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- water
- energy storage
- control device
- power plant
- evaporator
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000001816 cooling Methods 0.000 title claims abstract description 30
- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 12
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 4
- 230000002528 anti-freeze Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- 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
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a water cooling system and a water cooling method for an energy storage system of a thermal power plant, wherein cold water in an evaporator exchanges heat with hot water in a thermal control device through a heat exchanger, so that thermal runaway of the energy storage system can be effectively inhibited, and the safety of the system is greatly improved; the steam pipeline can effectively utilize low-grade steam of a thermal power plant, and has low energy consumption and high heat dissipation efficiency; the liquid cooling heat dissipation is uniform, so that the temperature difference of the battery cell can be reduced, and the service life of the battery cell is prolonged; the invention can meet the requirement of stable operation of the energy storage system under the environment of-40 ℃ to 60 ℃.
Description
Technical Field
The invention belongs to the field of energy storage, and particularly relates to a water cooling system of an energy storage system of a thermal power plant and a working method.
Background
The energy storage is one of important means for solving the intermittent fluctuation of wind power and photovoltaic of new energy and realizing the functions of peak clipping and valley leveling. The lithium battery has the characteristics of high energy density, high energy conversion efficiency and the like, so that the lithium battery is the most applied battery in the electrochemical energy storage project at present, and more lithium battery energy storage power stations are becoming important components of links such as power grid power generation and transmission transformation and distribution.
The heat generated during the charging and discharging processes of the lithium battery causes the temperature of the battery to rise, thereby affecting the operating characteristics (e.g., the service life) of the battery. The heat dissipation technology comprises air cooling, liquid cooling, phase change material cooling technology and the like. Air cooling has the advantages of easy maintenance, low cost and the like, but the heat conduction coefficient of air is low, so that the heat dissipation effect is not ideal; the liquid cooling medium has high heat exchange coefficient, large specific heat capacity and high cooling speed, but glycol and water are mostly adopted as the cooling medium of the cooling system in a certain proportion in the liquid cooling technology, once leakage occurs and short circuit occurs, accidents easily occur, and the safety of the cooling system cannot be guaranteed. The phase-change material can quickly absorb heat generated by the battery core, and when the phase-change process of the material is completely finished, the heat generated by the battery is continuously transmitted, so that the temperature of the material can only be continuously increased above the phase-change temperature.
Disclosure of Invention
The invention aims to overcome the defects and provides a water cooling system of an energy storage system of a thermal power plant and a working method thereof, so that a large-capacity lithium battery pack is uniformly cooled, the water temperature is prevented from greatly fluctuating, the cycle life is effectively prolonged, and the auxiliary power consumption is greatly reduced.
In order to achieve the purpose, the water cooling system of the energy storage system of the thermal power plant comprises an evaporator, a heat exchanger and a thermal control device, wherein a hot water pipeline of the thermal control device is connected with the heat exchanger to form a circulating pipeline, a cold water pipeline of the evaporator is connected with the heat exchanger to form a circulating pipeline, a steam pipeline of the evaporator is connected with an injection device, one side of the injection device is connected with a steam pipeline, the other side of the injection device is connected with a condenser, and the condenser is connected with a water conveying pipeline of the evaporator.
The water conveying pipeline of the condenser and the evaporator is provided with a first liquid storage tank.
A second liquid storage tank is arranged on a connecting pipeline of the heat exchanger and the evaporator, a circulating pump is arranged at the lower part of the second liquid storage tank, and the circulating pump is connected with the evaporator.
A filter is arranged on a pipeline between the thermal control device and the heat exchanger, a water pump is arranged at the downstream of the filter, and the water pump is connected with the heat exchanger.
An expansion tank is arranged between the filter and the water pump.
An electric heater is arranged between the filter and the expansion tank.
A working method of a water cooling system of an energy storage system of a thermal power plant comprises the following steps:
the water vapor from the vapor pipeline enters the spraying device, and is continuously extracted from the evaporator by virtue of high-speed vapor flow, and a certain vacuum is kept in the evaporator;
the steam in the spraying device together with the steam sucked from the evaporator enters the condenser to be cooled into water, and the water is discharged to the evaporator through the water conveying pipeline;
the cooled cold water in the evaporator enters the heat exchanger 13, and returns to the evaporator after cold energy is supplied;
and hot water of the thermal control device enters the heat exchanger, and the cooled hot water returns to the thermal control device to cool the thermal control device.
When the temperature of the thermal control device is lower than 0 ℃, adding an antifreeze into the water in the circulating pipeline between the thermal control device and the heat exchanger, and starting an electric heater on the circulating pipeline to stabilize the working temperature of the thermal control device at 20 +/-5 ℃.
The steam pressure of the steam pipeline is 0.4-0.8 MPa.
The hot water of the thermal control device firstly enters a filter, and the filtered hot water enters an expansion tank through an electric heater and then enters a water pump to be sent to a heat exchanger.
Compared with the prior art, the heat exchanger exchanges heat between cold water in the evaporator and hot water in the thermal control device, so that thermal runaway of the energy storage system can be effectively inhibited, and the safety of the system is greatly improved; the steam pipeline can effectively utilize low-grade steam of a thermal power plant, and has low energy consumption and high heat dissipation efficiency; the liquid cooling heat dissipation is uniform, so that the temperature difference of the battery cell can be reduced, and the service life of the battery cell is prolonged; the invention can meet the requirement of stable operation of the battery cell of the energy storage system in the environment of-40 ℃ to 60 ℃.
Furthermore, the electric heater is arranged, so that the working temperature of the thermal control device can be ensured constantly when the working condition temperature is insufficient.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
the system comprises a steam pipeline 1, a steam pipeline 2, an injection device 3, a condenser 4, a first liquid storage tank 5, a water pipeline 6, an evaporator 7, a second liquid storage tank 8, a circulating pump 9, an electric heater 10, a filter 11, a thermal control device 12, an expansion tank 13, a heat exchanger 14 and a water pump.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a water cooling system of an energy storage system of a thermal power plant comprises an evaporator 6, a heat exchanger 13 and a thermal control device 11, wherein a hot water pipeline of the thermal control device 11 is connected with the heat exchanger 13 to form a circulation pipeline, a cold water pipeline of the evaporator 6 is connected with the heat exchanger 13 to form a circulation pipeline, a steam pipeline of the evaporator 6 is connected with an injection device 2, one side of the injection device 2 is connected with a steam pipeline 1, the other side of the injection device is connected with a condenser 3, and the condenser 3 is connected with a water conveying pipeline 5 of the evaporator 6. A first liquid storage tank 4 is arranged on a water conveying pipeline 5 of the condenser 3 and the evaporator 6. A second liquid storage tank 8 is arranged on a connecting pipeline of the heat exchanger 13 and the evaporator 6, a circulating pump 8 is arranged at the downstream of the second liquid storage tank 8, and the circulating pump 8 is connected with the evaporator 6. A filter 10 is arranged on a pipeline between the thermal control device 11 and the heat exchanger 13, a water pump 14 is arranged at the downstream of the filter 10, and the water pump 14 is connected with the heat exchanger 13. An expansion tank 12 is provided between the filter 10 and the water pump 14. An electric heater 9 is arranged between the filter 10 and the expansion tank 12.
A working method of a water cooling system of an energy storage system of a thermal power plant comprises the following steps:
the water vapor from the steam pipeline 1 enters the spraying device 2, continuously extracts steam from the evaporator 6 by means of high-speed steam flow, and keeps a certain vacuum in the evaporator 6; the steam pressure of the steam pipeline 1 is 0.4-0.8 Mpa.
The steam in the injection device 2 enters the condenser 3 together with the steam sucked from the evaporator 6 to be cooled into water, and is discharged to the evaporator 6 through the water conveying pipeline 5;
the cooled cold water in the evaporator 6 enters the heat exchanger 13, and returns to the evaporator 6 after cold energy is supplied;
the hot water of the thermal control device 11 firstly enters the filter 10, the filtered hot water enters the expansion tank 12 through the electric heater 9, then enters the water pump 14 and is sent to the heat exchanger 13, and the cooled hot water returns to the thermal control device 11 to cool the thermal control device 11.
When the temperature of the thermal control device 11 is lower than 0 ℃, antifreeze is added into the water in the circulating pipeline between the thermal control device 11 and the heat exchanger 13, and the electric heater 9 on the circulating pipeline is started, so that the working temperature of the thermal control device 11 is stabilized at 20 +/-5 ℃.
When the temperature of the thermal control device 11 of the high-capacity lithium battery pack energy storage system is overhigh, hot water in the thermal control device 11 exchanges heat with cold water cooled in the evaporator 6 through the heat exchanger 13, and the thermal control device 11 of the high-capacity lithium battery pack energy storage system is continuously cooled; when the temperature of the thermal control device 11 of the large-capacity lithium battery pack energy storage system is too low, the circulating water in the thermal control device 11 is heated by starting the electric heater 9, so that the working temperature of the thermal control device 11 is ensured, the thermal control device 11 of the large-capacity lithium battery pack energy storage system can operate at-40 ℃ to 60 ℃, and the stable operation of the battery core is ensured.
Claims (10)
1. The utility model provides a water cooling system of energy storage system of thermal power plant, a serial communication port, including evaporimeter (6), heat exchanger (13) and thermal control device (11), heat exchanger (13) are connected to the hot water pipe of thermal control device (11), form circulation pipeline, heat exchanger (13) are connected to the cold water pipe of evaporimeter (6), form circulation pipeline, injection apparatus (2) are connected to the steam conduit of evaporimeter (6), steam conduit (1) is connected to injection apparatus (2) one side, condenser (3) are connected to the opposite side, conduit (5) of evaporimeter (6) are connected in condenser (3).
2. The water cooling system of the energy storage system of the thermal power plant as recited in claim 1, characterized in that the first liquid storage tank (4) is arranged on the water conveying pipeline (5) of the condenser (3) and the evaporator (6).
3. The water cooling system of the energy storage system of the thermal power plant as recited in claim 1, characterized in that a second liquid storage tank (8) is arranged on a connecting pipeline between the heat exchanger (13) and the evaporator (6), a circulating pump (8) is arranged at the downstream of the second liquid storage tank (8), and the circulating pump (8) is connected with the evaporator (6).
4. The water cooling system of the energy storage system of the thermal power plant as recited in claim 1, wherein a filter (10) is arranged on a pipeline between the thermal control device (11) and the heat exchanger (13), a water pump (14) is arranged at the downstream of the filter (10), and the water pump (14) is connected with the heat exchanger (13).
5. The water cooling system of the energy storage system of the thermal power plant as recited in claim 4, characterized in that an expansion tank (12) is arranged between the filter (10) and the water pump (14).
6. The water cooling system of the energy storage system of the thermal power plant as recited in claim 5, characterized in that an electric heater (9) is provided between the filter (10) and the expansion tank (12).
7. The working method of the water cooling system of the energy storage system of the thermal power plant as recited in claim 1, characterized by comprising the following steps:
the water vapor from the steam pipeline (1) enters the injection device (2), continuously extracts steam from the evaporator (6) by means of high-speed steam flow, and a certain vacuum is maintained in the evaporator (6);
the steam in the spraying device (2) and the steam sucked from the evaporator (6) enter the condenser (3) to be cooled into water, and the water is discharged to the evaporator (6) through the water conveying pipeline (5);
cold water cooled in the evaporator (6) enters the heat exchanger 13, and returns to the evaporator (6) after being supplied with cold energy;
hot water of the thermal control device (11) enters the heat exchanger (13), and the cooled hot water returns to the thermal control device (11) to cool the thermal control device (11).
8. The working method of the water cooling system of the energy storage system of the thermal power plant as claimed in claim 7, characterized in that when the temperature of the thermal control device (11) is lower than 0 ℃, antifreeze solution is added into the water in the circulating pipeline between the thermal control device (11) and the heat exchanger (13), and the electric heater (9) on the circulating pipeline is started to stabilize the working temperature of the thermal control device (11) at 20 ± 5 ℃.
9. The working method of the water cooling system of the energy storage system of the thermal power plant as claimed in claim 7, wherein the steam pressure of the steam pipeline (1) is 0.4-0.8 MPa.
10. The working method of the water cooling system of the energy storage system of the thermal power plant as claimed in claim 7, characterized in that hot water in the thermal control device (11) enters the filter (10), and the filtered hot water enters the expansion tank (12) through the electric heater (9) and then enters the water pump (14) to be sent to the heat exchanger (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921289.0A CN113540619A (en) | 2021-08-11 | 2021-08-11 | Water cooling system of energy storage system of thermal power plant and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921289.0A CN113540619A (en) | 2021-08-11 | 2021-08-11 | Water cooling system of energy storage system of thermal power plant and working method |
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| Publication Number | Publication Date |
|---|---|
| CN113540619A true CN113540619A (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110921289.0A Pending CN113540619A (en) | 2021-08-11 | 2021-08-11 | Water cooling system of energy storage system of thermal power plant and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069005A (en) * | 2021-10-26 | 2022-02-18 | 北京京能科技有限公司 | Heat exchange method of all-vanadium redox flow battery |
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| CN206539380U (en) * | 2017-02-28 | 2017-10-03 | 王清正 | A kind of thermal power plant's back pressure turbine steam discharge drives heat pump waste heat recovery system |
| CN207459129U (en) * | 2017-12-11 | 2018-06-05 | 厦门大学嘉庚学院 | A kind of heat dissipation of lithium battery system of box-type |
| CN111244575A (en) * | 2020-02-29 | 2020-06-05 | 北汽（常州）汽车有限公司 | Whole vehicle thermal management system applied to power battery of electric vehicle |
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2021
- 2021-08-11 CN CN202110921289.0A patent/CN113540619A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554589A (en) * | 2003-12-26 | 2004-12-15 | 国家***天津海水淡化与综合利用研 | High efficiency sea water desalination device and method by distillation |
| CN104842752A (en) * | 2014-01-27 | 2015-08-19 | 利勃海尔交通***股份有限公司 | Vehicle cooling circuit |
| CN106152596A (en) * | 2016-08-12 | 2016-11-23 | 程晋瑞 | A kind of cold end comprehensive energy-saving system for thermal power plant |
| CN206539380U (en) * | 2017-02-28 | 2017-10-03 | 王清正 | A kind of thermal power plant's back pressure turbine steam discharge drives heat pump waste heat recovery system |
| CN207459129U (en) * | 2017-12-11 | 2018-06-05 | 厦门大学嘉庚学院 | A kind of heat dissipation of lithium battery system of box-type |
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| CN114069005A (en) * | 2021-10-26 | 2022-02-18 | 北京京能科技有限公司 | Heat exchange method of all-vanadium redox flow battery |
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Application publication date: 20211022 |