Extremely cold sodium electricity energy storage charging and discharging system

Abstract

The invention belongs to the technical field of energy storage, and particularly relates to an extremely cold sodium-ion battery energy storage charge and discharge system, which comprises a battery module used for constructing a sodium-ion battery on the basis of a sodium-ion battery cell; the battery management module is used for performing temperature control and charge and discharge management on the sodium ion battery constructed by the battery module; the energy conversion and control module is used for performing bidirectional conversion on the current of the sodium ion battery, and can generate a control instruction according to the data of the battery management module and execute the control instruction; and the intelligent diagnosis and fault early warning module is used for carrying out fault diagnosis on the battery module and the energy conversion and control module and can carry out fault early warning after fault diagnosis. According to the invention, the battery module is optimized, and the lithium ion battery is replaced by the sodium ion battery, so that the battery module can efficiently operate and stably control the temperature under an extremely cold condition, the normal operation of the energy storage system is ensured to a certain extent, the use cost is reduced, and the maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an extremely cold sodium battery energy storage charging and discharging system. Background Art

[0002] In some high-latitude regions, mountainous areas, and cold industrial environments, winter temperatures often drop to extremely low levels, such as -30°C or even lower. Under these extremely cold conditions, traditional energy storage batteries, such as lithium-ion batteries, face serious performance challenges. For example, in low-temperature environments, the viscosity of the electrolyte in lithium-ion batteries increases, and the ion conduction rate slows down, resulting in increased internal resistance of the battery, a significant decrease in charge and discharge efficiency, and a significant decrease in capacity. This not only affects the normal operation of the energy storage system, but also increases the cost of use and the difficulty of maintenance. Therefore, an extremely cold sodium battery energy storage charge and discharge system is invented. Summary of the Invention

[0003] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: An extremely cold sodium battery energy storage and discharging system, comprising: Battery modules for constructing sodium-ion batteries based on sodium-ion cells; A battery management module, used to perform temperature control and charge and discharge management on the sodium-ion battery constructed by the battery module; The energy conversion and control module is used to perform bidirectional conversion of the current of the sodium-ion battery. At the same time, it can generate and execute control instructions based on the data of the battery management module; Intelligent diagnosis and fault warning module, used to diagnose faults of battery modules and energy conversion and control modules, and after diagnosing the faults, it can provide fault warnings; The energy optimization scheduling module is used to first predict the changes in energy supply and demand in extremely cold environments, and then generate corresponding charging and discharging strategies.

[0004] As a preferred solution of the extreme cold sodium battery energy storage and discharging system described in the present invention, the battery module includes: A cell selection module is used to select sodium ions with wide temperature range characteristics as cells; Design modules for combining multiple sodium-ion cells in series and parallel to form battery packs; A housing module, used to make a housing made of a material having thermal conductivity and assemble it with a battery pack; A thermal insulation module, used for forming a thermal insulation coating on the surface of the shell; The damage repair module is used to set a microcapsule type repair agent between the shell and the thermal insulation layer so that when the thermal insulation layer and the shell are damaged, the microcapsule type repair agent can be used to repair the damaged parts.

[0005] As a preferred solution of the extreme cold sodium battery energy storage charging and discharging system described in the present invention, the battery management module includes: The temperature control module is used to control the temperature inside the battery module so that the battery module can operate within the set temperature range; The charge and discharge control module is used to control the charge and discharge process of the battery module according to the temperature, voltage and current parameters of the battery module.

[0006] As a preferred solution of the extremely cold sodium battery energy storage and discharging system described in the present invention, the temperature control module includes: Temperature monitoring module, used to monitor the temperature inside the battery module; The temperature control module is used to adjust the temperature inside the battery module according to the temperature monitored by the temperature monitoring module.

[0007] As a preferred solution of the extreme cold sodium battery energy storage and discharging system described in the present invention, the energy conversion and control module includes: The bidirectional converter module is used to achieve bidirectional conversion between AC and DC. During the charging process, the AC power input from the grid or other power source is converted into DC power to charge the sodium-ion battery. During the discharging process, the DC power output from the sodium-ion battery is converted into AC and DC power to supply the load. The control module is used to receive data from the battery management module and signals from other sensors so that it can control the working status of the bidirectional converter module, the battery charging and discharging mode, and the connection and disconnection of the system with the external power grid or load according to preset strategies and instructions.

[0008] As a preferred solution of the extreme cold sodium battery energy storage charging and discharging system described in the present invention, the intelligent diagnosis and fault warning module includes: Battery diagnostic module, used to diagnose battery module faults; Equipment diagnostic module, used to diagnose the energy conversion and control module; A reminder module is used to remind personnel when a fault is diagnosed by the battery diagnosis module and the equipment diagnosis module; A storage module, used to store diagnostic data of the battery diagnostic module and the equipment diagnostic module; The evaluation module is used to generate health evaluation reports for the battery diagnosis module and the equipment diagnosis module based on the data stored in the storage module, so as to provide maintenance personnel with maintenance priority recommendations.

[0009] As a preferred solution of the extreme cold sodium battery energy storage charging and discharging system described in the present invention, the battery diagnostic module includes: Battery parameter acquisition module, used to collect voltage, current, temperature and internal resistance data of the battery module through sensors; A first model building module, configured to build a first prediction model for predicting a health state of a battery module based on an LSTM neural network; The first abnormality detection module is used to transmit the data collected by the battery parameter collection module and the historical operation data of the battery module to the first model construction module, so as to identify potential faults of the battery module in advance.

[0010] As a preferred solution of the extreme cold sodium battery energy storage charging and discharging system described in the present invention, the device diagnostic module includes: Equipment parameter acquisition module, used to collect voltage, current and temperature data of energy conversion and control module; a second model building module, configured to build a second prediction model for predicting the health status of the energy conversion and control module based on an LSTM neural network; The second anomaly detection module is used to transmit the data collected by the equipment parameter acquisition module and the historical operation data of the energy conversion and control module to the second model construction module, so as to identify potential faults of the energy conversion and control module in advance.

[0011] As a preferred solution of the extreme cold sodium battery energy storage and discharging system described in the present invention, the reminder module includes: Acquisition module, used to obtain the contact information of staff; The notification module is used to notify personnel via text messages to achieve remote reminders.

[0012] As a preferred solution of the extreme cold sodium battery energy storage charging and discharging system described in the present invention, the energy optimization scheduling module includes: Data acquisition module, used to collect environmental data and historical data of its system; A prediction module, used to predict changes in energy supply and demand in an extreme cold environment based on the data collected by the data acquisition module; The charge and discharge strategy module is used to generate corresponding strategy instructions based on the data predicted by the prediction module and upload them to the control module for execution.

[0013] Compared with existing technologies: 1. The present invention optimizes the battery module and replaces the lithium-ion battery with a sodium-ion battery, which enables the battery module to operate efficiently and maintain stable temperature under extremely cold conditions, ensuring the normal operation of the energy storage system to a certain extent, reducing usage costs and facilitating maintenance. 2. By setting up a battery management module and an energy conversion and control module, the present invention can not only achieve precise control of the temperature of the battery module, but also achieve all-round management of the battery based on the characteristics of the battery under extreme cold conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0015] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0016] The present invention provides an extremely cold sodium battery energy storage and discharge system. Figure 1 ; It includes: a battery module, which is used to construct a sodium-ion battery based on sodium-ion cells; a battery management module, which is used to perform temperature control and charge and discharge management on the sodium-ion battery constructed by the battery module; an energy conversion and control module, which is used to perform bidirectional conversion on the current of the sodium-ion battery, and at the same time, can generate and execute control instructions based on the data of the battery management module; an intelligent diagnosis and fault warning module, which is used to diagnose faults of the battery module and the energy conversion and control module, and can issue a fault warning after diagnosing the fault; an energy optimization scheduling module, which is used to first predict the changes in energy supply and demand in extremely cold environments, and then generate corresponding charge and discharge strategies.

[0017] The battery module includes: a cell selection module for selecting sodium-ion batteries with wide temperature range characteristics; a design module for combining multiple sodium-ion batteries in series and parallel to form a battery pack; a housing module for fabricating a housing made of a thermally conductive material and assembling it with the battery pack; a thermal insulation module for forming a thermal insulation coating on the housing surface; and a damage repair module for placing a microcapsule-type repair agent between the housing and the insulation layer to repair damage to the insulation layer and housing. The sodium-ion battery cells can discharge normally in temperatures as cold as -40 degrees Celsius. These sodium-ion batteries offer high energy density, long cycle life, and excellent low-temperature performance. The cell energy density can reach over 160Wh / kg and a cycle life exceeding 3,000 cycles (at low temperatures).

[0018] The battery management module includes: a temperature control module for controlling the temperature inside the battery module so that the battery module can operate within a set temperature range; and a charge and discharge control module for controlling the charge and discharge process of the battery module according to the temperature, voltage, and current parameters of the battery module.

[0019] The temperature control module includes: a temperature monitoring module for monitoring the temperature inside the battery module; and a temperature regulation module for regulating the temperature inside the battery module according to the temperature monitored by the temperature monitoring module.

[0020] The energy conversion and control module includes: a bidirectional conversion module for achieving bidirectional conversion between AC and DC. During the charging process, the module converts AC power input from the power grid or other power source into DC power to charge the sodium-ion battery. During the discharging process, the module converts DC power output from the sodium-ion battery into AC power to supply the load. A control module is used to receive data from the battery management module and signals from other sensors to control the operating state of the bidirectional conversion module, the battery charging and discharging mode, and the connection and disconnection of the system with the external power grid or load according to preset strategies and instructions.

[0021] The intelligent diagnosis and fault warning module includes: a battery diagnosis module, which is used to diagnose faults of the battery module; an equipment diagnosis module, which is used to diagnose the energy conversion and control module; a reminder module, which is used to remind personnel when the battery diagnosis module and the equipment diagnosis module diagnose faults; a storage module, which is used to store the diagnostic data of the battery diagnosis module and the equipment diagnosis module; and an evaluation module, which is used to generate health assessment reports for the battery diagnosis module and the equipment diagnosis module based on the data stored in the storage module, so as to provide maintenance priority recommendations to maintenance personnel.

[0022] The battery diagnosis module includes: a battery parameter acquisition module, which is used to collect voltage, current, temperature, and internal resistance data of the battery module based on sensors; a first model construction module, which is used to construct a first prediction model for predicting the health status of the battery module based on an LSTM neural network; and a first anomaly detection module, which is used to transmit the data collected by the battery parameter acquisition module and the historical operation data of the battery module to the first model construction module to enable early identification of potential faults of the battery module.

[0023] The equipment diagnosis module includes: an equipment parameter acquisition module for collecting voltage, current, and temperature data of the energy conversion and control module; a second model construction module for constructing a second prediction model for predicting the health status of the energy conversion and control module based on the LSTM neural network; and a second anomaly detection module for transmitting the data collected by the equipment parameter acquisition module and the historical operation data of the energy conversion and control module to the second model construction module so as to identify potential faults of the energy conversion and control module in advance.

[0024] The reminder module includes: an acquisition module for acquiring the contact information of the staff; and a notification module for notifying the staff via text messages to achieve remote reminders.

[0025] The energy optimization scheduling module includes: a data acquisition module for collecting environmental data and historical data of its system; a prediction module for predicting changes in energy supply and demand in an extreme cold environment based on the data collected by the data acquisition module; and a charging and discharging strategy module for generating corresponding strategy instructions based on the data predicted by the prediction module and uploading them to the control module for execution.

[0026] During specific use, the operating steps of those skilled in the art are as follows: S1: Sodium ions with wide temperature range characteristics are selected as battery cells through the battery cell selection module. Then, multiple sodium ion battery cells are combined in series and parallel through the design module to form a battery pack. After that, a shell is made of a material with thermal conductivity through the shell module and assembled with the battery pack. After assembly, a thermal insulation coating is formed on the surface of the shell through the thermal insulation module. During this process, a microcapsule-type repair agent is set between the shell and the thermal insulation layer through the damage repair module, so that when the thermal insulation layer and the shell are damaged, the microcapsule-type repair agent can be used to repair the damaged part; S2: The temperature inside the battery module is monitored by the temperature monitoring module. After monitoring, the temperature inside the battery module is adjusted by the temperature control module according to the temperature monitored by the temperature monitoring module. After adjustment, the charge and discharge control module controls the charge and discharge process of the battery module according to the temperature, voltage, and current parameters of the battery module. S3: During the charging and discharging process of the battery module, bidirectional conversion between AC and DC is achieved through the bidirectional converter module. Specifically, during the charging process, the AC power input from the grid or other power source is converted into DC power to charge the sodium-ion battery. During the discharging process, the DC power output from the sodium-ion battery is converted into AC and DC power to supply the load. When the bidirectional converter module is in operation, it receives data from the battery management module and signals from other sensors through the control module to control the working state of the bidirectional converter module, the charging and discharging mode of the battery, and the connection and disconnection of the system with the external grid or load according to preset strategies and instructions. S4: The voltage, current, temperature and internal resistance data of the battery module are collected by the battery parameter acquisition module according to the sensor. After the collection, the first prediction model for predicting the health status of the battery module is constructed according to the LSTM neural network through the first model construction module. After the construction, the data collected by the battery parameter acquisition module and the historical operation data of the battery module are transmitted to the first model construction module through the first abnormality detection module, so as to be able to identify the potential failure of the battery module in advance; at the same time, the voltage, current and temperature data of the energy conversion and control module are collected through the equipment parameter acquisition module. After the collection, the second model construction module is used to construct the model according to the LSTM neural network. The neural network constructs a second prediction model for predicting the health status of the energy conversion and control module. After the model is constructed, the data collected by the equipment parameter acquisition module and the historical operation data of the energy conversion and control module are transmitted to the second model construction module through the second anomaly detection module, so as to be able to identify potential faults of the energy conversion and control module in advance. After that, the reminder module can remind personnel when the battery diagnosis module and the equipment diagnosis module diagnose a fault, and the storage module can also store the diagnostic data of the battery diagnosis module and the equipment diagnosis module. After storage, the evaluation module will generate a health assessment report of the battery diagnosis module and the equipment diagnosis module based on the data stored in the storage module, so as to provide maintenance personnel with maintenance priority recommendations. S5: The environmental data and historical data of the system are collected through the data acquisition module. After the collection, the prediction module will predict the changes in energy supply and demand in the extremely cold environment based on the data collected by the data acquisition module. After the prediction, the charging and discharging strategy module will generate corresponding strategy instructions based on the data predicted by the prediction module and upload them to the control module for execution. For example, before a snowstorm arrives, the energy storage system can be adjusted to a fully charged state in advance to ensure power supply reliability.

[0027] Although the present invention has been described above with reference to embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An extremely cold sodium battery energy storage charging and discharging system, characterized in that: include: Battery modules for constructing sodium-ion batteries based on sodium-ion cells; A battery management module, used to perform temperature control and charge and discharge management on the sodium-ion battery constructed by the battery module; The energy conversion and control module is used to perform bidirectional conversion of the current of the sodium-ion battery. At the same time, it can generate and execute control instructions based on the data of the battery management module; Intelligent diagnosis and fault warning module, used to diagnose faults of battery modules and energy conversion and control modules, and after diagnosing the faults, it can provide fault warnings; The energy optimization scheduling module is used to first predict the changes in energy supply and demand in extremely cold environments, and then generate corresponding charging and discharging strategies.

2. The extremely cold sodium battery energy storage and discharging system according to claim 1, characterized in that: The battery module includes: A cell selection module is used to select sodium-ion batteries with wide temperature range characteristics as cells; Design modules for combining multiple sodium-ion cells in series and parallel to form battery packs; A housing module, used to make a housing made of a material having thermal conductivity and assemble it with a battery pack; A thermal insulation module, used for forming a thermal insulation coating on the surface of the shell; The damage repair module is used to set a microcapsule type repair agent between the shell and the thermal insulation layer so that when the thermal insulation layer and the shell are damaged, the microcapsule type repair agent can be used to repair the damaged parts.

3. The extremely cold sodium battery energy storage and discharging system according to claim 1, characterized in that: The battery management module includes: The temperature control module is used to control the temperature inside the battery module so that the battery module can operate within the set temperature range; The charge and discharge control module is used to control the charge and discharge process of the battery module according to the temperature, voltage and current parameters of the battery module.

4. The extremely cold sodium battery energy storage and discharging system according to claim 3 is characterized in that: The temperature control module includes: Temperature monitoring module, used to monitor the temperature inside the battery module; The temperature control module is used to adjust the temperature inside the battery module according to the temperature monitored by the temperature monitoring module.

5. The extremely cold sodium battery energy storage and discharging system according to claim 1, characterized in that: The energy conversion and control module includes: The bidirectional converter module is used to achieve bidirectional conversion between AC and DC. During the charging process, the AC power input from the grid or other power source is converted into DC power to charge the sodium-ion battery. During the discharging process, the DC power output from the sodium-ion battery is converted into AC and DC power to supply the load. The control module is used to receive data from the battery management module and signals from other sensors so that it can control the working status of the bidirectional converter module, the battery charging and discharging mode, and the connection and disconnection of the system with the external power grid or load according to preset strategies and instructions.

6. The extremely cold sodium battery energy storage and discharging system according to claim 1, characterized in that: The intelligent diagnosis and fault warning module includes: Battery diagnostic module, used to diagnose battery module faults; Equipment diagnostic module, used to diagnose the energy conversion and control module; A reminder module is used to remind personnel when a fault is diagnosed by the battery diagnosis module and the equipment diagnosis module; A storage module, used to store diagnostic data of the battery diagnostic module and the equipment diagnostic module; The evaluation module is used to generate health evaluation reports for the battery diagnosis module and the equipment diagnosis module based on the data stored in the storage module, so as to provide maintenance personnel with maintenance priority recommendations.

7. The extremely cold sodium battery energy storage and discharging system according to claim 6, characterized in that: The battery diagnosis module includes: Battery parameter acquisition module, used to collect voltage, current, temperature and internal resistance data of the battery module through sensors; A first model building module, configured to build a first prediction model for predicting a health state of a battery module based on an LSTM neural network; The first abnormality detection module is used to transmit the data collected by the battery parameter collection module and the historical operation data of the battery module to the first model construction module, so as to identify potential faults of the battery module in advance.

8. The extremely cold sodium battery energy storage and discharging system according to claim 6, characterized in that: The equipment diagnosis module includes: Equipment parameter acquisition module, used to collect voltage, current and temperature data of energy conversion and control module; a second model building module, configured to build a second prediction model for predicting the health status of the energy conversion and control module based on an LSTM neural network; The second anomaly detection module is used to transmit the data collected by the equipment parameter acquisition module and the historical operation data of the energy conversion and control module to the second model construction module, so as to identify potential faults of the energy conversion and control module in advance.

9. The extremely cold sodium battery energy storage and discharging system according to claim 6, characterized in that: The reminder module includes: Acquisition module, used to obtain the contact information of staff; The notification module is used to notify personnel via text messages to achieve remote reminders.

10. The extremely cold sodium battery energy storage and discharging system according to claim 1, characterized in that: The energy optimization scheduling module includes: Data acquisition module, used to collect environmental data and historical data of its system; A prediction module, used to predict changes in energy supply and demand in an extreme cold environment based on the data collected by the data acquisition module; The charge and discharge strategy module is used to generate corresponding strategy instructions based on the data predicted by the prediction module and upload them to the control module for execution.

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