Electrochemical energy storage system and method for energy storage power station

Abstract

The invention discloses an electrochemical energy storage system and method for an energy storage power station, and relates to the technical field of energy storage. The system comprises an electrochemical energy storage module, a heat dissipation module exchanging heat with the ground and a system control module, the heat dissipation module uses air as a medium, and the electrochemical energy storage module is subjected to heat dissipation and cooling in a mode of exchanging heat with the ground. According to the invention, external air is introduced into the underground heat exchange pipeline, an underground stable low-temperature environment is used as a natural cold source for heat exchange and cooling, and then the cooled air is introduced into the electrochemical energy storage module for heat dissipation and cooling; the conditions of the system caused by the traditional fan heat dissipation, liquid cooling and other modes in high-temperature, high-humidity and other severe environments are effectively reduced, and the stability and safety of the electrochemical energy storage system of the energy storage power station are improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an electrochemical energy storage system and method for an energy storage power station. Background Art

[0002] With the profound changes in the global energy structure, renewable energy sources such as wind power and solar energy are gradually becoming the mainstream of energy supply due to their clean and renewable characteristics. However, these renewable energy sources have significant intermittency, and their power generation is greatly affected by weather conditions. They are difficult to directly and stably connect to the power grid system, which poses a challenge to the stable operation of the power grid. In order to meet this challenge, energy storage power stations came into being. By storing excess electricity and releasing it when needed, it can effectively balance the load of the power grid and ensure the stable operation of the power grid.

[0003] Among the many energy storage technologies, electrochemical energy storage technology has become the leader in energy storage power stations due to its advantages such as high energy density, long life and no pollution. Electrochemical energy storage technology mainly uses chemical reactions to store and release electrical energy, among which batteries are the most common electrochemical energy storage devices. Lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, etc. are all the current mainstream electrochemical energy storage technologies.

[0004] As the scale of energy storage power stations expands and the capacity of battery energy storage systems increases, traditional battery heat dissipation methods, such as fan cooling and liquid cooling, will be greatly reduced in the face of harsh environments such as high temperature and high humidity. They may even cause the battery energy storage system to overheat and cause safety accidents. Summary of the invention

[0005] The purpose of this application is to solve the problem that traditional battery heat dissipation methods, such as fan heat dissipation, liquid cooling, etc., will have a greatly reduced heat dissipation effect when facing harsh environments such as high temperature and high humidity, and may even cause the battery energy storage system to overheat and cause safety accidents. This application provides an electrochemical energy storage system and method for an energy storage power station.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] An electrochemical energy storage system for an energy storage power station includes an electrochemical energy storage module, a heat dissipation module for exchanging heat with the ground, and a system control module. The heat dissipation module uses air as a medium to dissipate heat and cool the electrochemical energy storage module by exchanging heat with the ground.

[0008] Furthermore, the electrochemical energy storage module includes a battery pack, a battery management system and an energy storage inverter for storing and releasing electrical energy.

[0009] Furthermore, the heat dissipation module includes an air circulation device, an underground heat exchange pipe and a temperature adjustment device. The air circulation device introduces air into the underground heat exchange pipe, exchanges heat with the ground through the underground heat exchange pipe, and then the temperature is adjusted by the temperature adjustment device before returning to the electrochemical energy storage module for heat dissipation.

[0010] Furthermore, the underground heat exchange pipe in the heat dissipation module is made of high-efficiency heat conduction material to improve the heat exchange efficiency; the temperature adjustment device includes a fan, a heater or a refrigerator, etc., which is used to adjust the temperature of the cooled air as needed.

[0011] Furthermore, the system control module is used to monitor the temperature of the electrochemical energy storage module and control the operation of the heat dissipation module according to the temperature data to achieve automatic heat dissipation management.

[0012] Furthermore, the system also includes a fault detection and early warning module for real-time monitoring of the working status of the electrochemical energy storage module and the heat dissipation module. Once an abnormal situation is found, it can automatically send out an early warning signal and notify the system control module to take corresponding treatment measures.

[0013] Furthermore, the system also includes an energy efficiency optimization module, which provides energy efficiency optimization suggestions for the system control module based on the operating data of the electrochemical energy storage module, ambient temperature, heat dissipation efficiency and other factors through algorithm analysis, and adjusts the charging and discharging strategy of the electrochemical energy storage module and the operating mode of the heat dissipation module.

[0014] An electrochemical energy storage method for an energy storage power station is applicable to the electrochemical energy storage system of the energy storage power station described above, and the method comprises the following steps:

[0015] S1: Storing and releasing electrical energy in an electrochemical energy storage module;

[0016] S2: Start the air circulation device of the heat dissipation module to introduce air into the underground heat exchange pipeline, and exchange heat with the ground through the underground heat exchange pipeline to reduce the air temperature;

[0017] S3: Then, a temperature regulating device is used to further regulate the temperature of the cooled air, and the regulated cold air is returned to the electrochemical energy storage module for heat dissipation and cooling;

[0018] S4: Then, the fault detection and early warning module is used to monitor the working status of the electrochemical energy storage module and the heat dissipation module, and the working information of the electrochemical energy storage module and the heat dissipation module is sent to the system control module in real time;

[0019] S5: At the same time, the energy efficiency optimization module is started to adjust the charge and discharge strategy of the electrochemical energy storage module and the operation mode of the heat dissipation module, so that the system is in an efficient and economical operation state.

[0020] In summary, the present application includes at least one of the following beneficial effects:

[0021] 1. This application introduces external air into the underground heat exchange pipe, uses the stable low-temperature environment of the underground as a natural cold source for heat exchange and cooling, and then introduces the cooled air into the electrochemical energy storage module for heat dissipation and cooling. This effectively reduces the problems caused by traditional fan heat dissipation, liquid cooling and other methods when facing harsh environments such as high temperature and high humidity, and improves the stability and safety of the electrochemical energy storage system of the energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flow chart of the electrochemical energy storage system of the energy storage power station in this application.

[0023] Description of reference numerals:

[0024] 1. Electrochemical energy storage module; 2. Heat dissipation module; 3. System control module; 4. Fault detection and early warning module; 5. Energy efficiency optimization module; 6. Battery pack; 7. Battery management system; 8. Energy storage inverter; 9. Air circulation device; 10. Underground heat exchange pipeline; 11. Temperature control device. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 This application is described in further detail.

[0026] The embodiments of the present application disclose an electrochemical energy storage system and method for an energy storage power station.

[0027] Reference Figure 1 , an electrochemical energy storage system of an energy storage power station, comprising an electrochemical energy storage module 1, a heat dissipation module 2 for exchanging heat with the ground, and a system control module 3, wherein the heat dissipation module 2 uses air as a medium to dissipate heat and cool the electrochemical energy storage module 1 by exchanging heat with the ground;

[0028] The electrochemical energy storage module 1 includes a battery pack 6, a battery management system 7 and an energy storage converter 8, which are used to store and release electrical energy;

[0029] Moreover, the heat dissipation module 2 includes an air circulation device 9, an underground heat exchange pipeline 10 and a temperature adjustment device 11. The air circulation device 9 introduces air into the underground heat exchange pipeline 10, exchanges heat with the ground through the underground heat exchange pipeline 10, and then returns to the electrochemical energy storage module 1 for heat dissipation after the temperature is adjusted by the temperature adjustment device 11;

[0030] Moreover, the underground heat exchange pipe 10 in the heat dissipation module 2 is made of high-efficiency heat-conducting materials to improve the heat exchange efficiency; the temperature adjustment device 11 includes a fan, a heater or a refrigerator, etc., which is used to adjust the temperature of the cooled air as needed;

[0031] Furthermore, the system control module 3 is used to monitor the temperature of the electrochemical energy storage module 1 and control the operation of the heat dissipation module 2 according to the temperature data to achieve automatic heat dissipation management;

[0032] Moreover, the system also includes a fault detection and early warning module 4, which is used to monitor the working status of the electrochemical energy storage module 1 and the heat dissipation module 2 in real time. Once an abnormal situation is found, it can automatically send out an early warning signal and notify the system control module 3 to take corresponding treatment measures;

[0033] In addition, the system also includes an energy efficiency optimization module 5, which provides energy efficiency optimization suggestions for the system control module 3 based on the operating data, ambient temperature, heat dissipation efficiency and other factors of the electrochemical energy storage module 1 through algorithm analysis, and adjusts the charging and discharging strategy of the electrochemical energy storage module 1 and the operating mode of the heat dissipation module 2.

[0034] When in use, firstly, the battery management system 7 is set to start the energy storage converter 8 to import or output electric energy into the battery pack 6, so as to realize the storage and release of electric energy by the electrochemical energy storage module 1. Then, while the electrochemical energy storage module 1 is operating efficiently, the air circulation device 9 is started so that the external air is sucked in and guided into the underground heat exchange pipe 10. At the same time, since the underground heat exchange pipe 10 is made of high-efficiency heat conduction materials, the heat exchange between the air and the underground is more efficient, and the low temperature of the underground is used to cool the air passing through the underground heat exchange pipe 10.

[0035] The cooled air passing through the underground heat exchange pipe 10 then enters the temperature regulating device 11, and the air temperature is further regulated by fans, heaters or refrigerators in the north and south of the temperature regulating device 11 according to the real-time temperature requirements of the electrochemical energy storage module 1. When the temperature of the electrochemical energy storage module 1 is too high, the refrigerator will start to cool the air; when the temperature is moderate or too low, the fan will directly send the cooled air into the electrochemical energy storage module 1 to ensure that it operates within the optimal operating temperature range;

[0036] Then, while the electrochemical energy storage module 1 and the heat dissipation module 2 are running, the operating status of the electrochemical energy storage module 1 and the heat dissipation module 2 is monitored by setting a fault detection and early warning module 4. If an abnormality occurs in the electrochemical energy storage module 1 or the heat dissipation module 2, the fault detection and early warning module 4 sends an early warning signal and sends an abnormality signal to the system control module 3, so that the system control module 3 triggers corresponding treatment measures for the electrochemical energy storage module 1 and the heat dissipation module 2, such as reducing the charging and discharging power, increasing the speed of the heat dissipation fan, etc., to avoid potential safety hazards;

[0037] While the electrochemical energy storage module 1 and the heat dissipation module 2 are running, the energy efficiency optimization module 5 is set to provide energy efficiency optimization suggestions for the system control module 3 based on the operating data of the electrochemical energy storage module 1, the ambient temperature, the heat dissipation efficiency and other factors through advanced algorithm analysis, and the system control module 3 adjusts the operating status of the electrochemical energy storage module 1 and the heat dissipation module 2 so that the entire system is in an efficient and economical operating state, thereby facilitating the use of the stable low-temperature environment of the underground as a natural cold source to achieve heat exchange and cooling of the air passing through the electrochemical energy storage module 1, thereby effectively improving the stability and safety of the electrochemical energy storage system of the energy storage power station when facing harsh environments such as high temperature and high humidity.

[0038] An electrochemical energy storage method for an energy storage power station is applicable to the electrochemical energy storage system of the energy storage power station mentioned above, and the method comprises the following steps:

[0039] S1: Storing and releasing electrical energy in the electrochemical energy storage module 1;

[0040] S2: Start the air circulation device of the heat dissipation module 2 to introduce air into the underground heat exchange pipe 10, and perform heat exchange with the ground through the underground heat exchange pipe 10 to reduce the air temperature;

[0041] S3: Then, the temperature of the cooled air is further adjusted using the temperature adjustment device 11, and the adjusted cold air is returned to the electrochemical energy storage module 1 for heat dissipation and cooling;

[0042] S4: Then, the fault detection and early warning module 4 is used to monitor the working status of the electrochemical energy storage module 1 and the heat dissipation module 2, and the working information of the electrochemical energy storage module 1 and the heat dissipation module 2 is sent to the system control module 3 in real time;

[0043] S5: Simultaneously start the energy efficiency optimization module 5 to adjust the charge and discharge strategy of the electrochemical energy storage module 1 and the operation mode of the heat dissipation module 2, so that the system is in an efficient and economical operation state.

[0044] Working principle: First, the battery management system 7 controls the energy storage inverter 8 to import or output electric energy into the battery pack 6, so as to realize the storage and release of electric energy by the electrochemical energy storage module 1. Then, while the electrochemical energy storage module 1 is operating efficiently, the system starts the air circulation device 9 to inhale and guide the outside air into the underground heat exchange pipe 10. Since the underground heat exchange pipe 10 is made of high-efficiency heat-conducting materials, the heat exchange between the air and the ground is more efficient. The low temperature environment underground naturally cools the air passing through the heat exchange pipe, providing a stable low-temperature air source for the system;

[0045] The cooled air then enters the temperature regulating device 11, which further regulates the air temperature using a fan, heater or refrigerator according to the real-time temperature requirements of the electrochemical energy storage module 1. When the temperature of the electrochemical energy storage module is too high, the refrigerator starts to cool the air; when the temperature is moderate or too low, the fan directly sends the cooled air into the electrochemical energy storage module to ensure that it operates within the optimal operating temperature range;

[0046] Then, during operation, the fault detection and early warning module 4 monitors the operating status of the electrochemical energy storage module 1 and the heat dissipation module 2 in real time. Once an abnormal situation is found, such as module overheating, poor heat dissipation, etc., the module will immediately send a warning signal and send an abnormal signal to the system control module 3. The system control module triggers corresponding processing measures based on the received signal, such as reducing the charging and discharging power, increasing the speed of the cooling fan, etc.;

[0047] At the same time, the energy efficiency optimization module 5 provides energy efficiency optimization suggestions for the system control module 3 based on the operating data, ambient temperature, heat dissipation efficiency and other factors of the electrochemical energy storage module 1 through advanced algorithm analysis. The system control module adjusts the operating status of the electrochemical energy storage module 1 and the heat dissipation module 2 according to these suggestions, so that the entire system is in an efficient and economical operating state.

Claims

1. An electrochemical energy storage system for an energy storage power station, comprising an electrochemical energy storage module (1), a heat dissipation module (2) for exchanging heat with the ground, and a system control module (3), Features: The heat dissipation module (2) uses air as a medium to dissipate heat and cool the electrochemical energy storage module (1) by exchanging heat with the ground.

2. An electrochemical energy storage system for an energy storage power station according to claim 1, Features: The electrochemical energy storage module (1) comprises a battery pack (6), a battery management system (7) and an energy storage converter (8), and is used for storing and releasing electric energy.

3. An electrochemical energy storage system for an energy storage power station according to claim 1, Features: The heat dissipation module (2) comprises an air circulation device (9), an underground heat exchange pipeline (10) and a temperature adjustment device (11). The air circulation device (9) introduces air into the underground heat exchange pipeline (10), exchanges heat with the ground through the underground heat exchange pipeline (10), and then returns to the electrochemical energy storage module (1) for heat dissipation after the temperature is adjusted by the temperature adjustment device (11).

4. An electrochemical energy storage system for an energy storage power station according to claim 3, Features: The underground heat exchange pipe (10) in the heat dissipation module (2) is made of high-efficiency heat-conducting material to improve the heat exchange efficiency; the temperature adjustment device (11) includes a fan, a heater or a refrigerator, etc., and is used to adjust the temperature of the cooled air according to needs.

5. The electrochemical energy storage system of an energy storage power station according to claim 1, Features: The system control module (3) is used to monitor the temperature of the electrochemical energy storage module (1) and control the operation of the heat dissipation module (2) according to the temperature data, so as to realize automatic heat dissipation management.

6. An electrochemical energy storage system for an energy storage power station according to claim 1, Features: The system also includes a fault detection and early warning module (4) for real-time monitoring of the working status of the electrochemical energy storage module (1) and the heat dissipation module (2). Once an abnormal situation is found, an early warning signal can be automatically issued and the system control module (3) can be notified to take corresponding treatment measures.

7. The electrochemical energy storage system of an energy storage power station according to claim 1, Features: The system also includes an energy efficiency optimization module (5) which, based on the operating data of the electrochemical energy storage module (1), the ambient temperature, the heat dissipation efficiency and other factors, provides energy efficiency optimization suggestions to the system control module (3) through algorithm analysis, and adjusts the charging and discharging strategy of the electrochemical energy storage module (1) and the operating mode of the heat dissipation module (2).

8. An electrochemical energy storage method for an energy storage power station, It is characterized in that The method comprises the following steps: S1: storing and releasing electrical energy in the electrochemical energy storage module (1); S2: starting the air circulation device of the heat dissipation module (2) to introduce air into the underground heat exchange pipe (10), and performing heat exchange with the ground through the underground heat exchange pipe (10) to reduce the air temperature; S3: Then, the temperature of the cooled air is further adjusted using the temperature adjustment device (11), and the adjusted cold air is returned to the electrochemical energy storage module (1) for heat dissipation and temperature reduction; S4: Then, the fault detection and early warning module (4) is used to monitor the working status of the electrochemical energy storage module (1) and the heat dissipation module (2), and the working information of the electrochemical energy storage module (1) and the heat dissipation module (2) is sent to the system control module (3) in real time; S5: The energy efficiency optimization module (5) is simultaneously started to adjust the charge and discharge strategy of the electrochemical energy storage module (1) and the operation mode of the heat dissipation module (2), so that the system is in an efficient and economical operation state.

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