Sodium ion energy storage system double-layer optimization device considering battery health

Abstract

The utility model discloses a sodium ion energy storage system double-layer optimization device considering battery health, which comprises an energy storage battery unit, a sodium ion battery pack and a PCS converter, the energy storage power station secondary system is respectively connected with the sodium ion battery pack and the PCS converter and is used for acquiring voltage, current and temperature information of the sodium ion battery pack; the battery health monitoring unit is connected with the energy storage power station secondary system and is used for processing the voltage, current and temperature information of the sodium ion battery pack to obtain future state and real-time health state information of the battery; and the double-layer optimization control unit is respectively connected with the battery health monitoring unit and the energy storage power station secondary system and is used for outputting a battery charging and discharging instruction based on the battery future state and the real-time health state information, so that the energy storage power station secondary system performs charging and discharging control on the PCS converter after receiving the battery charging and discharging instruction. According to the utility model, the health condition of the battery can be monitored and optimally controlled in real time, so as to ensure that the battery runs in an optimal state.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy application, especially to a sodium ion energy storage system double-layer optimization device considering battery health. BACKGROUND

[0002] With the transformation of global energy structure and the rapid development of renewable energy, energy storage technology as the key link connecting power generation, power transmission, power distribution and power consumption, its importance is increasingly prominent. Sodium ion battery is considered as a strong competitor in the future energy storage field because of its low cost, abundant resources and environmental friendliness.

[0003] However, the stability, life and safety of sodium ion battery limit its application in large-scale energy storage system. In order to improve the efficiency and reliability of sodium ion battery energy storage system, the health status of battery needs to be monitored and optimized in real time to ensure that the battery operates in the best state, prolongs its service life, reduces maintenance cost and improves the safety of the system. UTILITY MODEL CONTENT

[0004] The utility model aims at least to solve the technical problems in the related art to some extent. Therefore, the purpose of the utility model is to provide a sodium ion energy storage system double-layer optimization device considering battery health, which can monitor and optimize the health status of battery in real time to ensure that the battery operates in the best state, prolongs its service life, reduces maintenance cost and improves the safety of the system.

[0005] To achieve the above purpose, the utility model realizes by the following technical scheme:

[0006] A sodium ion energy storage system double-layer optimization device considering battery health, comprising:

[0007] Energy storage battery unit, including sodium ion battery pack and PCS converter;

[0008] Energy storage power station secondary system, connected with sodium ion battery pack and PCS converter respectively, used for collecting voltage, current and temperature information of sodium ion battery pack;

[0009] Battery health monitoring unit, connected with energy storage power station secondary system, used for obtaining battery future state and real-time health state information based on voltage, current and temperature information processing of sodium ion battery pack;

[0010] Double-layer optimization control unit, connected with battery health monitoring unit and energy storage power station secondary system respectively, used for outputting battery charge and discharge instruction based on battery future state and real-time health state information, so that energy storage power station secondary system receives battery charge and discharge instruction to control PCS converter to charge and discharge.

[0011] Preferably, the secondary system of the energy storage power station comprises a BMS battery management module connected with the sodium-ion battery pack and the PCS converter respectively, for collecting voltage, current and temperature information of the sodium-ion battery pack, and sending electric parameter control instructions to the PCS converter to control and adjust the voltage and current of the sodium-ion battery pack.

[0012] Preferably, the secondary system of the energy storage power station further comprises a data server and a coordination controller, and the battery charge and discharge instructions are sent to the BMS battery management module through the data server and the coordination controller.

[0013] Preferably, the device further comprises a data transmission unit connected with the secondary system of the energy storage power station and the battery health monitoring unit respectively, for transmitting the voltage, current and temperature information of the sodium-ion battery pack collected by the secondary system of the energy storage power station to the battery health monitoring unit.

[0014] Preferably, the data transmission unit comprises a power wireless private network unit and a security infrastructure unit, the power wireless private network unit is connected with the BMS battery management module and the security infrastructure unit, and the security infrastructure unit is connected with the battery health monitoring unit.

[0015] Preferably, the battery health monitoring unit comprises a data interface service module connected with the security infrastructure unit, for receiving and processing the voltage, current and temperature information of the sodium-ion battery pack.

[0016] Preferably, the battery health monitoring unit further comprises:

[0017] a battery state evaluation module connected with the data interface service module, for obtaining battery real-time health state information based on the processed voltage, current and temperature information of the sodium-ion battery pack;

[0018] a health prediction module connected with the data interface service module, for obtaining battery future state information based on the processed voltage, current and temperature information of the sodium-ion battery pack.

[0019] Preferably, the double-layer optimization control unit comprises:

[0020] a long-term energy management module connected with the health prediction module, for obtaining long-term energy storage and release strategy based on the battery future state information.

[0021] Preferably, the double-layer optimization control unit further comprises:

[0022] a real-time control module connected with the long-term energy management module, the battery state evaluation module and the secondary system of the energy storage power station respectively, for obtaining battery charge and discharge instructions based on the long-term energy storage and release strategy and the battery real-time health state information, and sending the battery charge and discharge instructions to the secondary system of the energy storage power station.

[0023] Preferably, the device further comprises:

[0024] The energy storage power station thermal management system comprises a liquid cooling module connected with the BMS battery management module, and the liquid cooling module is used for receiving temperature control instructions issued by the BMS battery management module to control the sodium ion battery pack to work within an optimal temperature range.

[0025] The utility model at least has following technical effects:

[0026] (1) In terms of improving battery life and safety, the utility model monitors the voltage, current and temperature of the sodium ion battery pack in real time through the BMS battery management module, responds to abnormal conditions in a timely manner, avoids overcharging, overdischarging and overheating, and significantly improves the service life of the battery and the safety of the system.

[0027] (2) In terms of optimizing energy management, the double-layer optimization control unit can develop and adjust long-term and real-time energy storage and release strategies according to the battery health status and power grid demand, improve energy utilization efficiency, and reduce energy waste.

[0028] (3) In terms of improving system stability and reliability, through the cooperative work of the battery health monitoring unit and the double-layer optimization control unit, the system can predict and adapt to the changes in battery performance, reduce the system downtime caused by battery failure, and improve the stability and reliability of the entire energy storage system.

[0029] (4) In terms of reducing maintenance costs, the battery state evaluation module and the health prediction module can identify potential problems of the battery in advance, realize preventive maintenance, reduce the demand for emergency maintenance, and thus reduce maintenance costs.

[0030] (5) In terms of environmental adaptability, the energy storage power station thermal management system adopts a liquid cooling module based on phase change materials, which can effectively control the battery temperature and enable the system to operate stably under a wider range of environmental conditions.

[0031] (6) In terms of improving economic benefits, the utility model optimizes the battery charging and discharging process and energy management, reduces energy consumption, reduces maintenance costs, improves the economic benefits of the energy storage system, and makes it more competitive in commercial applications.

[0032] (7) In terms of promoting renewable energy integration, the utility model can effectively store and release electrical energy from renewable energy sources such as wind and solar energy, promote the wider use of renewable energy, and support the green transformation of the energy structure.

[0033] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 This is a structural block diagram of a dual-layer optimization device for a sodium-ion energy storage system that takes battery health into consideration, according to an embodiment of this utility model.

[0035] Figure 2 This is a schematic diagram illustrating the working principle of a dual-layer optimization device for a sodium-ion energy storage system that considers battery health, according to an embodiment of this utility model. Detailed Implementation

[0036] The following describes this embodiment in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The following description, with reference to the accompanying drawings, describes a dual-layer optimization device for a sodium-ion energy storage system that takes into account battery health.

[0038] Figure 1 This is a structural block diagram of a dual-layer optimization device for a sodium-ion energy storage system that takes battery health into consideration, according to an embodiment of this utility model. Figure 2 This is a schematic diagram illustrating the working principle of a dual-layer optimization device for a sodium-ion energy storage system that considers battery health, according to an embodiment of this utility model.

[0039] like Figure 1 and Figure 2 As shown, the sodium-ion energy storage system dual-layer optimization device 100 considering battery health includes an energy storage battery unit 10, an energy storage power station secondary system 20, a data transmission unit 30, a battery health monitoring unit 40, and a dual-layer optimization control unit 50.

[0040] The energy storage battery unit 10 includes a sodium-ion battery pack and a PCS (Power Conversion System) converter. The secondary system 20 of the energy storage power station is connected to both the sodium-ion battery pack and the PCS converter. The data transmission unit 30 is connected to both the secondary system 20 and the battery health monitoring unit 40. The dual-layer optimization control unit 50 is connected to both the battery health monitoring unit 40 and the secondary system 20.

[0041] In this embodiment, the energy storage power station secondary system 20 is used to collect the voltage, current and temperature information of the sodium-ion battery pack, and transmit the voltage, current and temperature information of the sodium-ion battery pack collected by the energy storage power station secondary system 20 to the battery health monitoring unit 40 through the data transmission unit 30. The battery health monitoring unit 40 processes the future state and real-time health state information of the battery based on the voltage, current and temperature information of the sodium-ion battery pack, and then sends the information to the double-layer optimization control unit 50. Finally, the double-layer optimization control unit 50 outputs the battery charging and discharging instructions to the energy storage power station secondary system 20 based on the future state and real-time health state information of the battery, so that the energy storage power station secondary system 20 receives the battery charging and discharging instructions and controls the PCS converter for charging and discharging.

[0042] Through the cooperative operation of the above-mentioned units, the embodiment can realize real-time monitoring and optimization control of the health status of the sodium-ion battery pack, i.e., the battery, so as to ensure that the battery operates in an optimal state, prolong its service life, reduce maintenance costs, and improve the safety of the system.

[0043] As shown in Figure 2 The energy storage power station secondary system 20 includes a BMS (Battery Management System, battery management system) battery management module, which is connected with the sodium-ion battery pack and the PCS converter, respectively. The BMS battery management module mainly ensures that the battery operates in a safe and efficient state.

[0044] Specifically, the BMS battery management module can be used to collect the voltage, current and temperature information of the sodium-ion battery pack, and send the collected voltage, current and temperature information to the battery health monitoring unit 40 through the data transmission unit 30. When it is necessary to adjust the voltage and current of the sodium-ion battery pack, the BMS battery management module can also send an electrical parameter control instruction to the PCS converter to control and adjust the voltage and current of the sodium-ion battery pack.

[0045] The data transmission unit 30 includes a power wireless private network unit and a security infrastructure unit. The power wireless private network unit is connected with the BMS battery management module and the security infrastructure unit, and the security infrastructure unit is connected with the battery health monitoring unit 40. The battery health monitoring unit 40 includes a data interface service module, which is connected with the security infrastructure unit.

[0046] In this embodiment, since the battery health detection unit 40 and the double-layer optimization control unit 50 are both in the station control layer of the energy storage power station, and the energy storage power station secondary system 20 including the BMS battery management module is located in the interval layer of the energy storage power station, there is physical isolation between the two layers, so data transmission needs to be performed through the power wireless private network unit. The security infrastructure unit is a professional detection and authentication power special horizontal one-way security isolation device. In this embodiment, the power wireless private network unit needs to pass through the security infrastructure unit to transmit data. Specifically, the BMS battery management module can send the collected voltage, current and temperature information to the data interface service module in a safe and wireless efficient manner through the power wireless private network unit and the security infrastructure unit. The data interface service module receives and processes the voltage, current and temperature information of the sodium-ion battery pack.

[0047] The battery health monitoring unit 40 also includes a battery state evaluation module and a health prediction module, both of which are connected with the data interface service module. After the data interface service module processes the voltage, current and temperature information of the sodium-ion battery pack, it sends the processed information to the battery state evaluation module and the health prediction module. The battery state evaluation module evaluates the real-time health status information of the battery based on the processed voltage, current and temperature information of the sodium-ion battery pack. The health prediction module predicts the future state information of the battery, i.e., the battery health status trend information, based on the processed voltage, current and temperature information of the sodium-ion battery pack using historical data and machine learning algorithms.

[0048] The double-layer optimization control unit 50 includes a long-term energy management module and a real-time control module. The long-term energy management module is connected with the health prediction module, and the real-time control module is connected with the long-term energy management module, the battery state evaluation module and the energy storage power station secondary system 20, respectively.

[0049] The long-term energy management module can obtain the future state information of the battery from the health prediction module and develop a long-term energy storage and release strategy based on the future state information of the battery. The real-time control module can obtain the real-time health status information of the battery from the battery state evaluation module, and then generate battery charging and discharging instructions based on machine learning techniques in combination with the long-term energy storage and release strategy provided by the long-term energy management module, to accurately control the charging and discharging process of the battery through the battery charging and discharging instructions.

[0050] After the real-time control module generates the battery charging and discharging instructions, it sends them to the energy storage power station secondary system 20, so that they are sent to the BMS battery management module through the data server and the coordination controller in the energy storage power station secondary system 20. After receiving the battery charging and discharging instructions, the BMS battery management module controls the PCS converter in the energy storage battery unit 10.

[0051] It should be noted that the device further comprises an energy storage power station thermal management system 60, including a liquid cooling module based on a phase change material, which is connected with the BMS battery management module. To ensure that the sodium-ion battery pack works within the optimal temperature range, the BMS battery management module can issue temperature control instructions to the liquid cooling module in the energy storage power station thermal management system 60, so that the liquid cooling module controls the working temperature of the sodium-ion battery pack after receiving the temperature control instructions.

[0052] In summary, the double-layer optimization device of the sodium-ion energy storage system considering battery health of the utility model not only can monitor and optimize control the health condition of the battery in real time to ensure that the battery runs in the best state, but also can prolong the service life, reduce the maintenance cost, and improve the safety of the system, which can improve the technical performance of the sodium-ion battery energy storage system, enhance the market competitiveness of the system, and has important significance for promoting the development of energy storage technology and the optimization of energy structure.

[0053] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0054] Although the content of the utility model has been described in detail by the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and alternatives of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the appended claims.

Claims

1. A device for double-layer optimization of a sodium-ion energy storage system considering battery health, characterized in that, The application relates to a sodium-ion battery energy storage station, which comprises the following parts: a sodium-ion battery energy storage unit, which comprises a sodium-ion battery pack and a PCS converter; a sodium-ion battery energy storage secondary system, which is connected with the sodium-ion battery pack and the PCS converter respectively and is used for collecting voltage, current and temperature information of the sodium-ion battery pack; a battery health monitoring unit, which is connected with the sodium-ion battery energy storage secondary system and is used for obtaining future state information and real-time health state information of the battery based on the voltage, current and temperature information of the sodium-ion battery pack; a double-layer optimization control unit, which is connected with the battery health monitoring unit and the sodium-ion battery energy storage secondary system respectively and is used for outputting a battery charging and discharging instruction based on the future state information and the real-time health state information of the battery so that the sodium-ion battery energy storage secondary system controls the charging and discharging of the PCS converter after receiving the battery charging and discharging instruction.

2. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 1, wherein, The sodium-ion battery energy storage secondary system comprises a BMS battery management module, which is connected with the sodium-ion battery pack and the PCS converter respectively and is used for collecting the voltage, current and temperature information of the sodium-ion battery pack and sending an electric parameter control instruction to the PCS converter so as to control and adjust the voltage and current of the sodium-ion battery pack.

3. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 2, wherein, The sodium-ion battery energy storage secondary system further comprises a data server and a coordination controller, and the battery charging and discharging instruction is sent to the BMS battery management module through the data server and the coordination controller.

4. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 3, wherein, The application further comprises the following parts: a data transmission unit, which is connected with the sodium-ion battery energy storage secondary system and the battery health monitoring unit respectively and is used for transmitting the voltage, current and temperature information of the sodium-ion battery pack collected by the sodium-ion battery energy storage secondary system to the battery health monitoring unit.

5. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 4, wherein, The data transmission unit comprises a power wireless private network unit and a security infrastructure unit, the power wireless private network unit is connected with the BMS battery management module and the security infrastructure unit, and the security infrastructure unit is connected with the battery health monitoring unit.

6. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 4, wherein, The battery health monitoring unit comprises a data interface service module, which is connected with the security infrastructure unit and is used for receiving and processing the voltage, current and temperature information of the sodium-ion battery pack.

7. The sodium-ion energy storage system double-layer optimization device considering battery health according to claim 6, wherein, The battery health monitoring unit further comprises the following parts: a battery state evaluation module, which is connected with the data interface service module and is used for evaluating the real-time health state information of the battery based on the processed voltage, current and temperature information of the sodium-ion battery pack; a health prediction module, which is connected with the data interface service module and is used for predicting the future state information of the battery based on the processed voltage, current and temperature information of the sodium-ion battery pack.

8. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 7, wherein, The double-layer optimization control unit comprises the following parts: a long-term energy management module, which is connected with the health prediction module and is used for obtaining a long-term energy storage and release strategy based on the future state information of the battery.

9. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to claim 8, wherein, The double-layer optimization control unit further comprises the following parts: a real-time control module, which is connected with the long-term energy management module, the battery state evaluation module and the sodium-ion battery energy storage secondary system respectively and is used for obtaining the battery charging and discharging instruction based on the long-term energy storage and release strategy and the real-time health state information of the battery and sending the battery charging and discharging instruction to the sodium-ion battery energy storage secondary system.

10. The device for double-layer optimization of sodium-ion energy storage system considering battery health according to any one of claims 2-9, wherein, The application further comprises the following parts: a sodium-ion battery energy storage station thermal management system, which comprises a liquid cooling module and is connected with the BMS battery management module, wherein the liquid cooling module is used for receiving a temperature control instruction issued by the BMS battery management module so as to control the sodium-ion battery pack to work in an optimal temperature range.

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