CN216389468U - Temperature maintaining system applied to flow battery - Google Patents
Temperature maintaining system applied to flow battery Download PDFInfo
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- CN216389468U CN216389468U CN202122231475.XU CN202122231475U CN216389468U CN 216389468 U CN216389468 U CN 216389468U CN 202122231475 U CN202122231475 U CN 202122231475U CN 216389468 U CN216389468 U CN 216389468U
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- 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
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Abstract
The utility model discloses a temperature maintenance system applied to a flow battery, which is characterized in that a positive pipeline and a negative pipeline of the flow battery system are respectively provided with a heat exchanger, the tube side of the heat exchanger is electrified with electrolyte, the inlet of the tube side of the heat exchanger is connected with the outlet pipeline of a main circulating pump of the flow battery system, the outlet of the tube side of the heat exchanger is connected with the inlet pipeline of a battery stack of the flow battery system, and the heat exchanger is driven by the main circulating pump to complete the heat exchange circulation of the electrolyte. The system exchanges heat with the electrolyte by using the pipeline heat exchanger outside the electrolyte storage tank, and reduces the system failure rate and the maintenance rate by adopting an indirect heat exchange mode. And the system heats the electrolyte in the energy storage system uniformly, and can ensure that the energy storage system operates in the optimal temperature range, so that the efficiency of the energy storage system is optimal. Meanwhile, the high-efficiency and stable operation of the liquid flow system is facilitated, and the problems of non-uniform electrolyte temperature, inaccurate system temperature control and high maintenance cost in the prior art are solved.
Description
Technical Field
The utility model belongs to the technical field of energy storage, and particularly relates to a temperature maintenance system applied to a flow battery.
Background
At present, the heat management mode of a large-scale electrolyte system mainly comprises that a heating coil is arranged in an electrolyte tank body, electrolyte in the tank body is heated in a soaking type heat exchange mode, the temperature of the electrolyte in the tank body is monitored in real time through temperature sensors arranged on the upper portion and the lower portion of the tank body, and the temperature of the electrolyte is controlled to achieve better battery efficiency. However, in the actual operation process, due to the corrosivity of the electrolyte, the processing technology of the tank body, the material and other reasons, the problems of leakage of the coil pipe of the heater of the tank body, poor sealing of the flange surface of the heater and the like are easy to occur, and the leakage of the electrolyte can be caused. The problems can cause the maintenance difficulty of the storage tank and the heat exchanger to be increased, and the operation and maintenance cost of the project is increased.
SUMMERY OF THE UTILITY MODEL
In view of the limitation of the thermal management technology of the conventional flow battery energy storage system, the present invention provides a temperature maintenance system applied to a flow battery to solve the problems in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a be applied to temperature maintenance system of redox flow battery, the system includes the redox flow battery system, positive pipeline and negative pole pipeline of redox flow battery system are provided with the heat exchanger respectively, electrolyte is switched on to the heat exchanger tube side, the import of heat exchanger tube side connects the outlet pipeline of the main cycle pump of redox flow battery system, the export of heat exchanger tube side connects the battery stack inlet pipeline of redox flow battery system, the heat exchanger leans on the main cycle pump drives accomplishes electrolyte heat transfer circulation.
Preferably, the heat exchanger comprises a positive reservoir heat exchanger and a negative reservoir heat exchanger, wherein,
the positive storage tank heat exchanger is arranged at a positive pipeline of a positive storage tank of the flow battery system, and the positive storage tank heat exchanger is arranged on a branch pipeline which is connected with the positive pipeline in parallel after the positive electrolyte pump.
The negative storage tank heat exchanger is arranged at a negative pipeline of a negative storage tank of the flow battery system, and the negative storage tank heat exchanger is arranged on a branch pipeline which is connected with the negative pipeline in parallel after the negative electrolyte pump.
Preferably, temperature sensors are arranged in the positive storage tank and the negative storage tank of the flow battery system.
Preferably, pure water is introduced into the shell side of the heat exchanger, the inlet of the shell side of the heat exchanger is connected with the outlet of a circulating water pump, the outlet of the shell side of the heat exchanger is connected with the inlet sides of the heater and the refrigerating unit, and the outlet sides of the heater and the refrigerating unit are connected with the circulating water pump.
Preferably, the heater and the refrigerating unit are arranged in parallel.
Preferably, a water supply temperature sensor is arranged on a pipeline at the rear end of the circulating water pump.
Preferably, a return water temperature sensor is arranged on a main pipeline connecting an outlet of the shell side of the heat exchanger with the inlet side of the heater and the inlet side of the refrigerating unit.
Preferably, the top of the heater is connected with an expansion water tank, and an expansion water tank liquid level meter is arranged on the side edge of the expansion water tank.
Preferably, the top of the expansion tank is provided with a soft water injection port.
Preferably, the temperature maintaining system comprises two operation modes of heating and refrigerating, and the electrolyte is cooled and heated.
The utility model has the technical effects and advantages that:
the temperature maintenance system of the flow battery comprises two operation modes of heating and refrigerating, so that the cooling and heating of the electrolyte are realized, and the temperature of the flow battery system can be effectively controlled when the external environment changes.
The temperature maintenance system of the flow battery provided by the utility model exchanges heat with the electrolyte by using the pipeline heat exchanger outside the electrolyte storage tank, adopts an indirect heat exchange mode, reduces the system failure rate and maintenance rate, and saves the maintenance and repair cost of the flow battery system.
The temperature maintenance system of the flow battery adopts the pipeline type heat exchanger, compared with the traditional mode that the heat exchanger is arranged in the storage tank, the heat exchange effect is more uniform, the operation of the electrolyte entering the battery stack in the optimal temperature range is ensured, and the operation stability and the high efficiency of the energy storage system are ensured.
The flow battery temperature maintenance system controls the power of the heater/refrigerating unit by monitoring the return water temperature of the temperature maintenance system, can effectively control the water supply temperature of the temperature maintenance system, and improves the accuracy of temperature regulation of the system.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-positive storage tank heat exchanger; 2-negative pole storage tank heat exchanger; 3-a heater; 4-an expansion water tank; 5-a circulating water pump; 6-backwater temperature sensor; 7-expansion tank level gauge; 8-water supply temperature sensor; 9-refrigerating unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the limitation of the thermal management technology of the conventional redox flow battery energy storage system, the utility model designs the temperature maintenance system applied to the redox flow battery, the system adopts a mode of indirect heat exchange outside the storage tank, and utilizes the pipeline heat exchanger to exchange heat with the electrolyte, so that the fault rate and the maintenance rate of the system can be reduced, and the energy storage system can be ensured to operate in the optimal temperature range, so that the efficiency of the energy storage system is optimal. The temperature maintenance system of the flow battery system can heat or cool the energy storage system, the temperature of the electrolyte is accurately controllable by monitoring the switching of the cooling/heating modes of the electrolyte temperature control thermal management system in real time and regulating and controlling the heat exchange power, and the temperature maintenance control method is a key technology for effectively controlling the operating temperature of the electrolyte of the system and is beneficial to the efficient and stable operation of the system.
The temperature maintaining system applied to the flow battery comprises two operation modes of heating and refrigerating, and the system consists of a positive storage tank heat exchanger 1 connected with a positive storage tank of the flow battery system, a negative storage tank heat exchanger 2 connected with a negative storage tank of the flow battery system, a heating system containing an expansion water tank 4 and a heater 3, a cooling system containing a refrigerating unit 9, a temperature maintaining system water supply temperature sensor 8, a return water temperature sensor 6 and a system circulating water pump 5.
The temperature maintenance system comprises a heat exchanger as a core component, wherein a positive pipeline and a negative pipeline of the redox flow battery system are respectively provided with a heat exchanger, electrolyte is conducted on a tube pass of the heat exchanger, an inlet of the tube pass of the heat exchanger is connected with an outlet pipeline of a main circulating pump of the redox flow battery system, an outlet of the tube pass of the heat exchanger is connected with an inlet pipeline of a battery stack of the redox flow battery system, and the heat exchanger is driven by the main circulating pump to complete heat exchange circulation of the electrolyte.
As shown in fig. 1, the heat exchanger includes a positive storage tank heat exchanger 1 and a negative storage tank heat exchanger 2, where the positive storage tank heat exchanger 1 is disposed at a positive pipe of a positive storage tank of a flow battery system, and is installed on a branch pipe connected in parallel with a positive main pipe after a positive electrolyte pump. And the negative storage tank heat exchanger 2 is arranged at a negative pipeline of a negative storage tank of the flow battery system and is arranged on a branch pipeline which is connected with the negative main pipeline in parallel after the negative electrolyte pump. Temperature sensors are respectively arranged in a positive storage tank and a negative storage tank of the flow battery system, and the temperature of electrolyte in the storage tank is monitored in real time through the temperature sensors in the storage tank.
Pure water is introduced into the shell side of the heat exchanger, the shell side inlet of the heat exchanger is connected with the outlet of the circulating water pump 5, and the shell side outlet of the heat exchanger is connected with the inlet sides of the heater 3 and the refrigerating unit 9. The heater 3 and the refrigerating unit 9 are arranged in parallel. The tail ends of the heater 3 and the refrigerating unit 9 are connected with a circulating water pump 5. The heat exchanger heats the medium in the heater 3 through the circulating water pump 5, and cools the medium in the heat exchanger to finish the heating and heat exchange process; meanwhile, the medium can be cooled in the refrigerating unit 9 through the circulating water pump 5, and the temperature in the heat exchanger is raised, so that the cooling and heat exchange process is completed.
And a water supply temperature sensor 8 is arranged on a pipeline at the rear end of the circulating water pump 5. And the water supply temperature sensor 8 is used for monitoring the temperature of the pure water in the pipeline after passing through the temperature maintenance system.
And a return water temperature sensor 6 is arranged on a main pipeline connecting the shell side outlet of the heat exchanger with the inlet sides of the heater 3 and the refrigerating unit 9, and the return water temperature sensor 6 is used for monitoring the temperature of return water in the pipeline. The temperature of the supply water and the return water of the temperature maintenance system is monitored by the return water temperature sensor 6 and the supply water temperature sensor 8, and the power of the heater 3 or the refrigerating unit 9 is adjusted according to the return water temperature of the temperature maintenance system.
The top of the heater 3 is connected with an expansion water tank 4, and an expansion water tank liquid level meter 7 is arranged on the side edge of the expansion water tank 4. And the top of the expansion water tank 4 is provided with a soft water injection port for introducing pure water into the shell pass of the heater 3. The heat exchanger is driven by a circulating water pump 5 to complete pure water circulation in the pipeline. In this embodiment, still set up relevant valve in the relevant pipeline, control pipeline UNICOM realizes hot and cold water circulation, also makes things convenient for the maintenance work in later stage simultaneously.
In the running process of the energy storage system, the temperature of the environment where the energy storage battery system is placed is monitored in real time, theoretical calculation is carried out on the heat gain/heat dissipation capacity of electrolyte through compiling an algorithm in a control system according to the charging and discharging working conditions and the power of the energy storage system and the environment temperature where the system is located, the temperature change trend of the electrolyte is further obtained, meanwhile, the temperature maintenance system is controlled to start the heater 3 or the refrigerating unit 9 through monitoring the temperature of the electrolyte, the power of the heater 3 or the refrigerating unit 9 is adjusted through the return water temperature in the heat exchanger, and automatic adjustment of the temperature of the electrolyte is accurately and efficiently achieved.
Specifically, the temperature maintaining system applied to the flow battery comprises two operation modes of heating and refrigerating, and cooling and heating of the electrolyte are achieved. The temperature maintenance system comprises a positive storage tank heat exchanger 1 connected with a positive storage tank of the flow battery system; the negative storage tank heat exchanger 2 is connected with a negative storage tank of the flow battery system; a heating system comprising an expansion tank 4 and a heater 3; a cooling system including a refrigerator group 9; a temperature maintenance system water supply temperature sensor 8 and a return water temperature sensor 6; a system circulating water pump 5 and the like. When the temperature of the electrolyte is monitored to be lower than the lower limit of the optimal temperature range, a heating system is started to heat the electrolyte; and when the temperature of the electrolyte is monitored to be higher than the upper limit of the optimal temperature range, starting a cooling system to cool the electrolyte. The embodiment is as follows:
heating mode
The positive and negative storage tanks of the flow battery system contain temperature sensors, when the temperature in the storage tank is lower than the lower limit of the optimal temperature range, the circulating water pump 5 is started, the temperature maintenance system heater 3 is started again to heat pure water, the hot water is sent into the positive storage tank heat exchanger 1 and the negative storage tank heat exchanger 2 through the circulating water pump 5, and in the heat exchangers, the high-temperature pure water exchanges heat with the low-temperature electrolyte to enable the temperature of the electrolyte to be raised to the optimal temperature range. The temperature of the supply water and the return water of the heating system is monitored by the return water temperature sensor 6 and the supply water temperature sensor 8, and the power of the heater 3 is adjusted according to the temperature of the return water of the temperature maintenance system. The temperature of the electrolyte in the storage tank is monitored in real time through the temperature sensor in the storage tank, when the temperature of the electrolyte reaches the optimal temperature range, the temperature maintenance system heater 3 is firstly closed, then the circulating water pump 5 is closed, and the heating of the electrolyte is stopped. The liquid level of the expansion water tank 4 is monitored by the expansion water tank liquid level meter 7 in the system heating process, water is required to be supplemented into the system when the liquid level is low, and the heater 3 is prevented from being burnt dry to cause equipment damage.
Refrigeration mode
The positive and negative storage tanks of the redox flow battery system contain temperature sensors, when the temperature in the storage tank is higher than the upper limit of the optimal temperature range, the circulating water pump 5 is firstly started, the temperature maintenance system refrigerating unit 9 is then started, pure water is cooled, the cooling water is sent into the positive storage tank heat exchanger 1 and the negative storage tank heat exchanger 2 through the circulating water pump 5, and in the heat exchangers, the low-temperature pure water exchanges heat with the low-temperature electrolyte, so that the temperature of the electrolyte is reduced to the optimal temperature range. The temperature of the supply water and the return water of the heating system is monitored by the return water temperature sensor 6 and the water supply temperature sensor 8, and the power of the refrigerating unit 9 is adjusted according to the temperature of the return water of the temperature maintenance system. The temperature of the electrolyte in the storage tank is monitored in real time through the temperature sensor in the storage tank, when the temperature of the electrolyte reaches the optimal temperature range, the temperature maintenance system refrigerating unit 9 is firstly closed, then the circulating water pump 5 is closed, and the cooling of the electrolyte is stopped.
Heat exchanger mounting position
The utility model relates to a positive storage tank heat exchanger 1 and a negative storage tank heat exchanger 2 which are respectively arranged on branch pipelines which are connected with positive and negative main pipelines in parallel after positive and negative electrolyte pumps. When heat exchange is not needed, valves at two ends of the positive and negative storage tank heat exchangers are closed, pipeline valves connected with the heat exchangers in parallel are opened, and electrolyte enters the cell stack from the outlets of the storage tanks through the main system pump and then through the main system pipeline; when the system needs heat exchange, valves at two ends of the positive and negative storage tank heat exchangers are opened, valves of pipelines connected with the heat exchangers in parallel are closed, electrolyte respectively enters the positive and negative heat exchangers from outlets of the positive and negative storage tanks after passing through a main pump of the system, and then enters the battery stack after reaching an optimal temperature range after heat exchange.
The flow battery temperature maintenance system provided by the utility model adopts the pipeline type heat exchanger, the heating effect is uniform, and the energy storage system can be ensured to operate in the optimal temperature range, so that the efficiency of the energy storage system is optimal.
The flow battery temperature maintenance system controls the power of the heater/refrigerating unit by monitoring the return water temperature of the temperature maintenance system, can effectively control the water supply temperature of the temperature maintenance system, and improves the accuracy of temperature regulation of the system.
The system adopts a mode of indirect heat exchange outside the storage tank, realizes heat exchange between the medium and the electrolyte by using the pipeline heat exchanger, can reduce the fault rate and the maintenance rate of the system, and can ensure that the energy storage system operates in the optimal temperature range so as to achieve the optimal efficiency of the energy storage system. The temperature maintenance system of the flow battery system can heat or cool the energy storage system, the temperature of the electrolyte is accurately controllable by monitoring the switching of the cooling/heating modes of the electrolyte temperature control thermal management system in real time and regulating and controlling the heat exchange power, and the temperature maintenance control method is a key technology for effectively controlling the operating temperature of the electrolyte of the system and is beneficial to the efficient and stable operation of the system.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (10)
1. A temperature maintaining system applied to a flow battery comprises the flow battery system and is characterized in that: the positive pipeline and the negative pipeline of the flow battery system are respectively provided with a heat exchanger, electrolyte is conducted on a tube pass of the heat exchanger, an inlet of the tube pass of the heat exchanger is connected with an outlet pipeline of a main circulating pump of the flow battery system, and an outlet of the tube pass of the heat exchanger is connected with an inlet pipeline of a battery stack of the flow battery system.
2. The temperature maintaining system applied to the flow battery as recited in claim 1, wherein: the heat exchanger comprises a positive storage tank heat exchanger (1) and a negative storage tank heat exchanger (2),
the positive storage tank heat exchanger (1) is arranged at a positive pipeline of a positive storage tank of the flow battery system, and the positive storage tank heat exchanger (1) is arranged on a branch pipeline which is connected with the positive pipeline in parallel after the positive electrolyte pump;
the negative storage tank heat exchanger (2) is arranged at a negative pipeline of a negative storage tank of the redox flow battery system, and the negative storage tank heat exchanger (2) is arranged on a branch pipeline which is connected with the negative pipeline in parallel after the negative electrolyte pump.
3. The temperature maintaining system applied to the flow battery as recited in claim 1, wherein: and temperature sensors are arranged in the anode storage tank and the cathode storage tank of the flow battery system.
4. The temperature maintaining system applied to the flow battery as recited in claim 1, wherein: pure water is introduced into the shell side of the heat exchanger, the shell side inlet of the heat exchanger is connected with the outlet of a circulating water pump (5), the shell side outlet of the heat exchanger is connected with the inlet sides of a heater (3) and a refrigerating unit (9), and the outlet sides of the heater (3) and the refrigerating unit (9) are connected with the circulating water pump (5).
5. The temperature maintaining system applied to the flow battery as recited in claim 4, wherein: the heater (3) and the refrigerating unit (9) are arranged in parallel.
6. The temperature maintaining system applied to the flow battery as recited in claim 5, wherein: and a water supply temperature sensor (8) is arranged on a pipeline at the rear end of the circulating water pump (5).
7. The temperature maintaining system applied to the flow battery as recited in claim 4, wherein: and a return water temperature sensor (6) is arranged on a main pipeline connecting the shell side outlet of the heat exchanger with the inlet sides of the heater (3) and the refrigerating unit (9).
8. The temperature maintaining system applied to the flow battery as recited in claim 4 or 6, wherein: the top of the heater (3) is connected with the expansion water tank (4), and an expansion water tank liquid level meter (7) is arranged on the side edge of the expansion water tank (4).
9. The temperature maintaining system applied to the flow battery as recited in claim 8, wherein: the top of the expansion water tank (4) is provided with a soft water injection port.
10. The temperature maintaining system applied to the flow battery as recited in claim 1, wherein: the temperature maintaining system comprises two operation modes of heating and refrigerating and is used for cooling and heating the electrolyte.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122231475.XU CN216389468U (en) | 2021-09-15 | 2021-09-15 | Temperature maintaining system applied to flow battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122231475.XU CN216389468U (en) | 2021-09-15 | 2021-09-15 | Temperature maintaining system applied to flow battery |
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| CN216389468U true CN216389468U (en) | 2022-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115312802A (en) * | 2022-07-21 | 2022-11-08 | 北京和瑞储能科技有限公司 | Modular flow battery system and arrangement mode thereof |
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2021
- 2021-09-15 CN CN202122231475.XU patent/CN216389468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115312802A (en) * | 2022-07-21 | 2022-11-08 | 北京和瑞储能科技有限公司 | Modular flow battery system and arrangement mode thereof |
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