A control system based on energy storage cabinet charging and discharging management

Abstract

The present invention discloses a control system for charge and discharge management based on an energy storage cabinet, and relates to the technical field related to the charge and discharge management system of an energy storage cabinet. By dynamically grouping batteries in the energy storage cabinet, the batteries of the power supply part can be further grouped according to the power demand, and the battery group can be customized according to the power, current and voltage requirements of each electrical appliance to ensure the best performance. The separate power supply scheme is also more flexible because different electrical appliances can be independently configured and controlled to adapt to different working conditions. Dynamic grouping can also divide the batteries into multiple groups during charging, and peak-shifting charging can be performed according to the charging characteristics of the batteries, so that the load of the charging line remains stable, the current load peaks and troughs are reduced, and the utilization rate is guaranteed within the upper limit of the current load of the charging line, so that the energy storage cabinet can be charged with a stable current all the time, and the current load upper limit will not be exceeded, and the carrying capacity during the current trough will not be wasted.

Description

Technical Field

[0001] The present invention relates to the technical field related to energy storage cabinet charge and discharge management systems, and in particular to a control system based on energy storage cabinet charge and discharge management. Background Art

[0002] Energy storage cabinet is a device used to store electrical energy. It is widely used in renewable energy systems, microgrids, emergency power supplies and power system dispatching to balance grid supply and demand, improve energy efficiency and respond to sudden power outages. The charge and discharge management control system is a key component of the battery energy storage system, designed to ensure the safe, stable and efficient operation of the battery while maximizing the battery life.

[0003] The batteries in traditional energy storage cabinets are connected in series or in parallel as a whole and can be regarded as a complete battery. Both charging and discharging are carried out simultaneously. Since the charging and discharging process of the battery is a reversible chemical reaction, it is difficult to supply power while charging. At the same time, the charging circuit of the energy storage cabinet has an upper limit of current load. Therefore, it is necessary to ensure that the load limit is not exceeded during charging. Therefore, the charging efficiency of the energy storage cabinet is limited by the load limit, resulting in low charging efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a control system for charge and discharge management of an energy storage cabinet, so as to solve the problem that the traditional energy storage cabinet is limited by the upper limit of the current load of the charging line, resulting in low charging efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions: a control system for charge and discharge management based on an energy storage cabinet, the system comprising: a battery management module, an energy management module, a power electronics module, a communication module and a safety protection module;

[0006] The battery management module is responsible for monitoring, controlling and managing various parameters and operations of the battery to ensure its safe and reliable operation. The battery management module manages the batteries in the energy storage cabinet by grouping;

[0007] The energy management module optimizes energy management by coordinating and allocating the groups of each battery in the energy storage cabinet to meet the charging and energy replenishment needs of the system;

[0008] The power electronics module is responsible for the conversion, control and distribution of energy through the power electronics system;

[0009] The communication module realizes remote monitoring and control of the energy storage system through the Internet, and collects data from various parts of the system for real-time analysis, fault diagnosis and performance optimization, as well as inter-group communication, so that each group can communicate and collaborate with each other;

[0010] The safety protection module is responsible for monitoring and responding to potential safety hazards and failures that may occur in the system to ensure the safe operation of the system.

[0011] Furthermore, the battery management module divides the batteries in the energy storage cabinet into three categories, namely a charging group, a power supply group and a standby group, wherein the charging group is charged, the power supply group is supplied or waiting for supply, and the standby group is in a guaranteed state for standby.

[0012] Furthermore, the power supply group and the backup group each have at least one group, and the charging group has at least two groups, each group contains at least one battery, wherein the number of charging groups, power supply groups and backup groups respectively, and the number of batteries contained in each group are flexibly scheduled and adjusted according to demand.

[0013] Furthermore, the battery management module numbers and marks each battery in the energy storage cabinet, and matches it with the corresponding charge and discharge controller to achieve grouping and positioning of each battery in circuit connection, and display the grouping status in real time on the control end display.

[0014] Furthermore, the number of power supply groups matches the number of electrical appliances, and the number of storage batteries in the power supply group corresponding to each electrical appliance is adjusted according to the power, current, voltage, usage time and periodicity of the electrical appliances.

[0015] Furthermore, during charging, the batteries that need to be charged are distributed into at least two charging groups, and the charging is controlled according to four stages: trickle charging, constant current charging, constant voltage charging, and charging termination. At the same time, at least two charging groups adopt staggered charging, that is, when one charging group is in the trickle charging, constant voltage charging, and charging termination stages of low current load, another charging group is required to be in the constant current charging stage of high current load to ensure that the charging circuit always operates within the safe current load and eliminate current peaks and troughs.

[0016] Furthermore, during charging, the energy management module adaptively adjusts the number of charging groups and the number of batteries in each charging group through real-time grid power load data. That is, when the grid power load is low, the number of charging groups or the number of batteries in each charging group is increased while ensuring normal operation; when the grid power load is high, the number of charging groups or the number of batteries in each charging group is reduced while ensuring normal operation.

[0017] Furthermore, the power electronic module is provided with a separate charging controller and a discharging controller for each battery, and a separate circuit breaker is provided on each cell in each battery, and a separate current sensor, voltage sensor and temperature sensor are configured.

[0018] Furthermore, the communication module includes a remote monitoring and control module, a data acquisition and real-time analysis module, a performance optimization and scheduling module, and an inter-group communication and collaboration module;

[0019] Wherein, the remote monitoring and control module is connected to the Internet device via one or more of Ethernet, Wi-Fi and cellular network to achieve remote monitoring and control;

[0020] The data acquisition and real-time analysis module interfaces with various sensors in the energy storage system to collect data on the system's operating status in real time. The sensors include voltage sensors, current sensors, temperature sensors, etc.

[0021] The performance optimization and scheduling module transmits the performance data of the energy storage system and performs remote analysis to optimize and schedule the system;

[0022] The inter-group communication and collaboration module provides an effective inter-group communication mechanism so that the various groups can collaborate and communicate with each other.

[0023] Furthermore, the safety protection module aggregates the monitoring data of the current sensors, voltage sensors and temperature sensors at all the cells, screens the cells in abnormal state, and grades the health status of the cells, and refers to the health classification of the cells;

[0024] When the battery management module groups the batteries, it prioritizes grouping the batteries in good health into the charging group and the power supply group, and groups the batteries in slightly less good health into the spare group. At the same time, the batteries in more dangerous health are isolated from the batteries through the circuit breaker, and the battery containing the battery is isolated from the group through the circuit breaker when necessary.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention proposes a control system for charge and discharge management of energy storage cabinets, which dynamically groups the batteries in the energy storage cabinets so that some batteries are charged and some batteries are powered, thereby achieving simultaneous charging and power supply.

[0027] This also allows the batteries in the power supply part to be grouped according to power demand. This way, the battery pack can be customized according to the power, current and voltage requirements of each appliance to ensure optimal performance. The separate power supply solution is also more flexible because different appliances can be configured and controlled independently to adapt to different working conditions. At the same time, if one appliance fails, the separate power supply system can continue to operate without affecting other appliances.

[0028] Dynamic grouping can also divide the batteries into multiple groups during charging. According to the charging characteristics of the batteries, peak-shift charging is performed to keep the load of the charging line stable, reduce the current load peaks and troughs, and ensure the utilization rate within the current load limit of the charging line. This allows the energy storage cabinet to be charged with a stable current without exceeding the current load limit or wasting the carrying capacity during the current trough.

[0029] In addition, dynamic grouping can also assign batteries in poor health to the spare group. While providing emergency backup, it also facilitates live inspection and maintenance, improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a control system for charge and discharge management of an energy storage cabinet according to the present invention;

[0031] Figure 2 This is a schematic diagram of battery grouping according to the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 and Figure 2 As shown, a control system for charging and discharging management based on an energy storage cabinet includes: a battery management module, an energy management module, a power electronics module, a communication module and a safety protection module.

[0034] 1. Battery management module: responsible for monitoring, controlling and managing various parameters and operations of the battery to ensure its safe and reliable operation. The battery management module manages the batteries in the energy storage cabinet by grouping.

[0035] Large battery systems usually contain a large number of single batteries, which are usually connected in series and parallel. When managing batteries in groups, the batteries in the energy storage cabinet are divided into three categories: charging group, power supply group and standby group.

[0036] At any time point, the charging group is charging, the power supply group is supplying power or waiting for power supply, and the standby group is in a standby state, which can be flexibly scheduled and adjusted according to work needs.

[0037] The power supply group and the backup group each have at least one group, and the charging group has at least two groups, each of which contains at least one battery. The number of charging groups, power supply groups and backup groups, as well as the number of batteries contained in each group can be flexibly adjusted according to demand.

[0038] By numbering and marking each battery in the energy storage cabinet and matching it with the corresponding charge and discharge controller, each battery can be grouped and located in the circuit connection, and the grouping status can be displayed in real time on the display, making it easier to manage the batteries.

[0039] Different numbers of power supply groups can be set up according to demand scheduling to supply power to different electrical appliances separately. Since different electrical appliances have different power and energy requirements, different numbers of batteries can be flexibly called to form a power supply group for power supply according to different power requirements, so that decentralized management can be carried out, so that each battery can be managed and controlled independently, so that energy distribution can be configured and adjusted more flexibly to adapt to different working conditions, and fault isolation can be achieved at the same time. If a power supply group fails, other power supply groups can still continue to supply power, reducing the impact on the entire system. At the same time, different numbers of charging groups can also be set up according to demand scheduling for independent charging. In the prior art, in order to improve the reliability and stability of battery charging and prevent the shortening of battery life due to improper charging. When the charging demand and power supply demand are met, the excess batteries can be incorporated into the standby group.

[0040] 2. Energy management module: The energy management module optimizes energy management by coordinating and allocating the groups of each battery in the energy storage cabinet to meet the charging and replenishment needs of the system. Through intelligent scheduling and control, the energy management module can optimize the utilization of electrical energy, reduce costs, and improve the energy efficiency and stability of the system.

[0041] The energy management module flexibly adjusts the number of charging groups, power supply groups, and standby groups, as well as the number of batteries in each group, according to demand, to improve the efficiency of charging and power supply of the energy storage cabinet. The energy management module adjusts the number of charging groups, power supply groups, and standby groups, as well as the number of batteries in each group, in the following ways:

[0042] The scheduling and allocation of the power supply group is based on the following factors:

[0043] 1. Power demand: Different electrical appliances may have different power requirements. According to the power requirements of each electrical appliance, the number of batteries in each group can be determined to ensure that the operating requirements of the electrical appliance are met.

[0044] 2. Current demand: Some devices may require higher current to operate normally, while others may require lower current. By considering the current demand of each electrical appliance, the number of batteries can be adjusted to meet the stable operation of the equipment.

[0045] 3. Voltage requirements: Different electrical appliances may have different voltage requirements. Ensure that there are enough batteries in each group to provide power output that meets the voltage requirements of the electrical appliances.

[0046] 4. Usage time and periodicity: Some electrical appliances may need to run for a long time, while others may be used intermittently. Depending on the usage time and periodicity of each electrical appliance, the number of batteries can be adjusted to ensure sufficient power is provided when needed.

[0047] Charging group: The battery charging process is usually divided into four stages: trickle charge, constant current charge, constant voltage charge and charge termination.

[0048] 1. Trickle charge: Trickle charge is the initial stage of charging, which starts the charging process by applying a very small current. The main purpose of this stage is to supplement the self-discharge loss in the battery, as well as to provide sufficient current when the battery capacity is lower than the rated value to ensure safety when starting constant current charging. Trickle charge can ensure that the battery is always maintained at the appropriate charge level by supplementing the self-discharge loss, while avoiding the safety problems that may be caused by directly applying a large current.

[0049] 2. Constant current charging: The constant current charging stage applies a constant current to deliver energy to the battery in order to quickly charge the battery. During this stage, the battery voltage will gradually rise. By charging with a constant current, the battery can be fully charged in a relatively short time, and this method can ensure that the battery maintains a stable current state during the charging process to avoid overcharging or overheating.

[0050] 3. Constant voltage charging: Once the battery voltage reaches the preset end-of-charge voltage, the charging system automatically switches to constant voltage charging mode. During this stage, the charging current gradually decreases until it approaches zero. The constant voltage charging stage ensures that the battery voltage does not exceed the safe range, and the charging current gradually decreases, which helps to avoid overheating or overcharging of the battery.

[0051] 4. Charge termination: When the battery reaches the charging end condition (for example, reaches the set charging current or voltage threshold), the charging system automatically stops charging to prevent overcharging or damage to the battery. The charge termination stage ensures that the charging process ends in time after reaching the preset target, thereby avoiding overcharging, extending the battery life, and improving the safety of the charging process.

[0052] By dividing the charging process into these four stages, the charging process can be better controlled, ensuring that the battery has high reliability and stability during charging, and maximizing the battery life. Since the power of the battery is different at different charging stages, we can divide the charged battery into multiple charging groups and perform staggered charging, so that different charging groups are in different charging stages at the same time to smooth the charging power peak and valley values ​​to protect the circuit. At the same time, the flexible deployment of charging groups can ensure that there are charging groups charging at any time. With the staggered charging of different charging groups, continuous charging and energy replenishment can be performed within the rated charging power range to the maximum extent, so as to extend the charging time and reduce the charging power, thereby ensuring higher charging efficiency with lower charging power.

[0053] When charging, the number of charging groups and the number of batteries in different charging groups need to be flexibly adjusted according to the following factors:

[0054] 1. Temperature adjustment: At high temperatures, the self-discharge rate of the battery usually increases, causing the battery to lose energy on its own when not working, and high temperatures will accelerate this process. At the same time, the chemical reaction rate of the battery may increase at high temperatures, but it is also accompanied by higher internal resistance, which will cause the charging rate to slow down because more energy is converted into heat rather than electrical energy. In addition, high temperatures will accelerate the aging process of the battery and reduce its lifespan, because at high temperatures, the chemical reaction inside the battery is more intense, resulting in increased loss of battery materials, and some batteries may be more prone to failure at high temperatures, and even cause safety problems. Therefore, a temperature sensor can be used to monitor the temperature of the battery, and low-temperature batteries are preferentially selected to be included in the charging group for priority charging. At the same time, the ambient temperature sensor is used to detect the ambient temperature. Under the condition of ensuring normal operation, the number of charging groups or the number of batteries in each charging group can be reduced at high temperatures, and the number of charging groups or the number of batteries in each charging group can be appropriately increased at low temperatures.

[0055] 2. Grid power load: Grid power load refers to the total electric energy required by the entire power system within a certain period of time. It represents the total power demand of all power-consuming equipment and facilities in the power system. Since people's electricity demand usually changes periodically over time, the grid power load will also change periodically over time. Because the price in the electricity market is usually closely related to the supply and demand relationship, the electricity price is lower when the electricity demand is lower. Therefore, when the grid power load is low and the electricity price is low, the number of charging groups or the number of batteries in each charging group can be increased without affecting normal operation. When the grid power load is high and the electricity price is high, the number of charging groups or the number of batteries in each charging group can be reduced without affecting normal operation.

[0056] Backup group: Different numbers of backup groups are prepared for backup. At the same time, the number of batteries contained in each group can be flexibly adjusted according to actual needs. The batteries in the backup group do not participate in power supply and charging, and can be inspected and maintained and transferred to the backup group.

[0057] 3. Power electronics module: The power electronics system is the key part that connects the power supply, energy storage and electrical appliances. It is responsible for the conversion, control and distribution of energy. Through the power electronics system, efficient energy conversion can be achieved, the charging and discharging process can be flexibly controlled, and different power supply and load requirements can be adapted to improve the efficiency of the entire system. The power electronics module sets up a separate charging controller and discharge controller for each battery on the basis of the conventional energy storage cabinet electronic circuit, ensuring that after the battery management module groups the batteries, the control signal can control the opening and closing and path connection of the charging controller and the discharge controller, and realize the physical connection of the batteries of each charging group and power supply group, so as to realize independent and unified charging and power supply, and at the same time, the physical isolation between different groups of batteries is realized through electronic switches or relays.

[0058] In addition, the power electronics module is equipped with a separate circuit breaker on each cell in each battery, and is configured with a separate current sensor, voltage sensor and temperature sensor to cooperate with the safety protection module to perform safety management and control of each cell.

[0059] 4. Communication module: Through the Internet or other communication means, remote monitoring and control of the energy storage system is realized, and data from various parts of the system are collected for real-time analysis, fault diagnosis and performance optimization, as well as inter-group communication, so that each group can communicate and collaborate with each other. The communication module includes the following modules:

[0060] 1. Remote monitoring and control module: The communication module needs to integrate devices that can connect to the Internet to achieve remote monitoring and control, which can be achieved through one or more of Ethernet, Wi-Fi and cellular networks. In order to achieve remote control of the energy storage system, the communication module supports corresponding communication protocols, including MQTT and HTTP.

[0061] 2. Data acquisition and real-time analysis module: The communication module needs to interface with various sensors in the energy storage system to collect data on the system's operating status in real time. Sensors include voltage sensors, current sensors, temperature sensors, etc. Through the communication module, the collected data is transmitted to a remote server or cloud platform in real time for real-time analysis and monitoring. Considering the limitations of bandwidth and storage, the communication module needs to perform data compression and optimization mechanisms to ensure effective data transmission.

[0062] 3. Performance optimization and scheduling module: The communication module supports remote analysis by transmitting the performance data of the energy storage system, so as to optimize and schedule the system. At the same time, control instructions can be sent through the communication module to adjust the operating parameters of the energy storage system to optimize system performance.

[0063] 4. Inter-group communication and collaboration module: For different groups within the energy storage system, the communication module needs to provide an effective inter-group communication mechanism so that the various groups can collaborate and communicate with each other. The communication mechanism uses the CAN bus.

[0064] 5. Safety protection module: The safety protection module is responsible for monitoring and responding to potential safety hazards and faults that may occur in the system to ensure the safe operation of the system. By introducing a safety system, the system can respond to abnormal conditions such as battery failure, current overload, overtemperature, etc. in a timely manner, take protective measures to prevent accidents from expanding, and improve the reliability and safety of the system.

[0065] The safety protection module aggregates the monitoring data of current sensors, voltage sensors and temperature sensors at all cells, screens cells in abnormal status, and grades the health status of the cells. With reference to the cell health classification, when the battery management module groups the batteries, the batteries with good cell health status are preferentially divided into the charging group and the power supply group, and the batteries with slightly worse cell health status are divided into the spare group. In addition, if the health status of a cell is more dangerous, it is necessary to isolate the cell from the battery through a circuit breaker to avoid affecting other normal cells. If necessary, the battery to which the cell belongs needs to be isolated from the group through a circuit breaker, and the cell or battery number is transmitted to the control end through the communication module to facilitate the maintenance and replacement of the faulty cells and batteries to ensure the overall safety of the energy storage cabinet.

[0066] The security protection module includes the following key functions and components:

[0067] 1. Sensor data aggregation and abnormal screening: The safety protection module needs to be connected to the current sensor, voltage sensor and temperature sensor of the battery system to aggregate the monitoring data of each battery cell in real time. Use algorithms to analyze the data and screen out abnormal battery cells, such as over-temperature, over-voltage, over-current, etc.

[0068] 2. Cell health status classification: Set the evaluation criteria for the health status of the battery cells and classify the health status of each battery cell based on the sensor data. This can include establishing thresholds and classifying them according to the degree to which the thresholds are exceeded.

[0069] 3. Battery grouping and optimization: In the battery management module, cells are grouped according to their health status. Cells in good health are assigned to the charging group and the power supply group, and cells in poor health are assigned to the standby group. Intelligent algorithms are used to optimize the grouping to ensure balanced performance of each group.

[0070] 4. Isolation of dangerous cells: When a cell is found to be in a dangerous condition, the cell is isolated through a circuit breaker. This can prevent the dangerous cell from affecting the entire battery system. If more thorough isolation is required, the battery containing the dangerous cell is isolated from the group through a circuit breaker to ensure that the problem does not spread.

[0071] 5. Dangerous cell condition reporting: Integrate the communication module into the safety protection module to transmit relevant information to the control end. This includes the cell number, battery number, and information related to the health of the cell. Use the communication module to ensure real-time transmission for remote monitoring and timely response to problems.

[0072] 6. Remote maintenance and replacement: After receiving the information from the communication module, the control end needs to implement remote maintenance and replacement functions. This may include remotely controlling circuit breakers, sounding alarms, and arranging personnel to inspect or replace dangerous cells or batteries.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control system for charge and discharge management of energy storage cabinets, characterized in that: The system includes: a battery management module, an energy management module, a power electronics module, a communication module and a safety protection module; The battery management module is responsible for monitoring, controlling and managing various parameters and operations of the battery to ensure its safe and reliable operation. The battery management module manages the batteries in the energy storage cabinet by grouping. The battery management module divides the batteries in the energy storage cabinet into three categories, namely, a charging group, a power supply group and a standby group. The charging group is charged, the power supply group is powered or waiting for power supply, and the standby group is guaranteed to be in standby state. The number of power supply groups matches the number of electrical appliances, and the number of batteries in the power supply group corresponding to each electrical appliance is adjusted according to the power, current, voltage, usage time and periodicity of the electrical appliances. During charging, the batteries to be charged are at least allocated to two charging groups, and the charging is controlled in four stages: trickle charging, constant current charging, constant voltage charging and charging termination. At the same time, at least two charging groups adopt staggered charging, that is, when one charging group is in the trickle charging, constant voltage charging and charging termination stages of low current load, another charging group is required to be in the constant current charging stage of high current load, so as to ensure that the charging circuit always operates within the safe current load and reduce the current peaks and troughs; The energy management module optimizes energy management by coordinating and allocating the groups of each battery in the energy storage cabinet to meet the charging and energy replenishment needs of the system; The power electronics module is responsible for the conversion, control and distribution of energy through the power electronics system; The communication module realizes remote monitoring and control of the energy storage system through the Internet, and collects data from various parts of the system for real-time analysis, fault diagnosis and performance optimization, as well as inter-group communication, so that each group can communicate and collaborate with each other; The safety protection module is responsible for monitoring and responding to potential safety hazards and failures that may occur in the system to ensure the safe operation of the system.

2. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: The power supply group and the standby group each have at least one group, and the charging group has at least two groups, each group contains at least one battery, wherein the number of charging groups, power supply groups and standby groups and the number of batteries contained in each group are flexibly scheduled and adjusted according to demand.

3. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: The battery management module numbers and marks each battery in the energy storage cabinet and matches it with the corresponding charge and discharge controller to achieve grouping and positioning of each battery in terms of circuit connection, and display the grouping status in real time on the control end display.

4. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: During charging, the energy management module adaptively adjusts the number of charging groups and the number of batteries in each charging group through real-time grid power load data. That is, when the grid power load is low, the number of charging groups or the number of batteries in each charging group is increased while ensuring normal operation; when the grid power load is high, the number of charging groups or the number of batteries in each charging group is reduced while ensuring normal operation.

5. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: The power electronic module is equipped with a separate charging controller and a discharging controller for each storage battery, and a separate circuit breaker is provided on each cell in each storage battery, and is equipped with a separate current sensor, voltage sensor and temperature sensor.

6. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: The communication module includes a remote monitoring and control module, a data acquisition and real-time analysis module, a performance optimization and scheduling module, and an inter-group communication and collaboration module; Wherein, the remote monitoring and control module is connected to the Internet device via one or more of Ethernet, Wi-Fi and cellular network to achieve remote monitoring and control; The data acquisition and real-time analysis module interfaces with various sensors in the energy storage system to collect data on the system's operating status in real time. The sensors include voltage sensors, current sensors, and temperature sensors. The performance optimization and scheduling module transmits the performance data of the energy storage system and performs remote analysis to optimize and schedule the system; The inter-group communication and collaboration module provides an effective inter-group communication mechanism so that the various groups can collaborate and communicate with each other.

7. A control system for charge and discharge management based on an energy storage cabinet as claimed in claim 1, characterized in that: The safety protection module aggregates the monitoring data of current sensors, voltage sensors and temperature sensors at all battery cells, screens the battery cells in abnormal state, and grades the health status of the battery cells, and refers to the health classification of the battery cells; When the battery management module groups the batteries, it prioritizes assigning batteries with good cell health to the charging group and the power supply group, and assigns batteries with slightly less good cell health to the standby group. At the same time, cells with more dangerous health are isolated from the batteries through circuit breakers, and the battery containing the cell is isolated from the group through circuit breakers when necessary.

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