Intelligent control cabinet

Abstract

The present disclosure relates to an intelligent control cabinet, which belongs to the field of energy storage technology and can save the cost and space of wiring between boxes. An intelligent control cabinet includes a cabinet and a distribution circuit, a control circuit and a communication circuit located in the cabinet, wherein: the distribution circuit is connected to the mains power grid, converts the alternating current of the mains power grid into direct current for supplying power to the internal devices and external loads of the intelligent control cabinet, converts the high-voltage direct current output by the DC switch cabinet of the energy storage system into direct current for supplying power to the internal devices and external loads of the intelligent control cabinet, and protects the remote lines and the internal devices and external loads of the intelligent control cabinet; the control circuit obtains various switch quantity status information inside the intelligent control cabinet, and controls the on and off of the power supply circuits of the internal devices and external loads of the intelligent control cabinet based on the switch quantity status information; the communication circuit exchanges data with the SCADA outside the intelligent control cabinet.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technology, and in particular, to an intelligent control cabinet. Background Art

[0002] The topology of existing energy storage systems is usually as follows: Figure 1 As shown in the figure, it usually requires more controllers or control cabinets, each of which can only realize independent functions and needs to be collected and processed by the Supervisory Control And Data Acquisition (SCADA) or Energy Management System (EMS) controller. For example, the Potential Transformer (PT) metering cabinet collects the voltage and current data of the main circuit and the accumulated power; the distribution cabinet is used to provide auxiliary power for the system controller and load, and is equipped with overvoltage / overcurrent protection devices; the communication cabinet is mainly used to analyze and process the general information of the energy storage system, can accept the dispatching instructions of the EMS, and can be uploaded to the cloud monitoring platform; the system controller is mainly responsible for collecting the status information of the system auxiliary equipment and ensuring the normal operation of the system according to the preset control strategy. Therefore, in the existing energy storage system topology, the functions of each cabinet are independent of each other, and the devices are dispersed. It is usually necessary to connect communication and control cables between multiple cabinets. Affected by the site layout, various external environmental interferences may be introduced. Summary of the invention

[0003] The purpose of the present disclosure is to provide an intelligent control cabinet that can improve the internal space utilization of energy storage containers, save the cost and space occupied by wiring between boxes, effectively avoid external environmental interference, increase the speed of system information interaction, reduce the number of controllers, and improve product stability.

[0004] According to a first embodiment of the present disclosure, there is provided an intelligent control cabinet for an energy storage system, comprising a cabinet body and a power distribution circuit, a control circuit and a communication circuit located in the cabinet body, wherein: the power distribution circuit is connected to a mains power grid, converts the alternating current of the mains power grid into direct current for supplying power to internal devices and external loads of the intelligent control cabinet, and converts the high-voltage direct current output by a direct current switch cabinet of the energy storage system into direct current for supplying power to internal devices and external loads of the intelligent control cabinet, and the power distribution circuit is also used to protect remote lines and internal devices and external loads of the intelligent control cabinet; the control circuit is used to obtain various types of switch quantity status information inside the intelligent control cabinet, and control the on and off of the power supply circuits of the internal devices and external loads of the intelligent control cabinet based on the switch quantity status information; and the communication circuit is used to exchange data with a data acquisition and monitoring control system outside the intelligent control cabinet.

[0005] Optionally, the power distribution circuit includes an AC / DC switching power supply, a DC / DC switching power supply, an uninterruptible power supply, and a backup battery, wherein: the AC / DC switching power supply converts the alternating current of the mains power grid into low-voltage direct current and then provides it to the uninterruptible power supply; the DC / DC switching power supply converts the high-voltage direct current output by the DC switch cabinet into low-voltage direct current and then provides it to the uninterruptible power supply; when the mains power grid is supplying power normally, the uninterruptible power supply charges the backup battery, and when the mains power grid loses power, the backup battery supplies power to the internal devices and external loads of the intelligent control cabinet through the uninterruptible power supply; the power distribution circuit is also used to directly provide the alternating current of the mains power grid to the high-power alternating current load outside the intelligent control cabinet.

[0006] Optionally, the power distribution circuit includes a first lightning arrester, a circuit breaker and a fuse, wherein: the first lightning arrester is used to protect the remote line from lightning surge risks; the circuit breaker is arranged in the power distribution circuit for overload protection; the fuse is used to provide short-circuit protection for devices in the power distribution circuit.

[0007] Optionally, the control loop includes a main controller, wherein: the main controller is used to receive information sent by a lower-level energy storage unit controller outside the intelligent control cabinet and instructions issued by an energy management system outside the intelligent control cabinet, and control the on and off of the main loop of the energy storage system outside the intelligent control cabinet based on the information sent by the lower-level energy storage unit controller and the instructions issued by the energy management system; the main controller is also used to obtain various types of switch quantity status information inside the intelligent control cabinet, and control the on and off of the internal devices of the intelligent control cabinet and the external load power supply circuit based on the switch quantity status information.

[0008] Optionally, the main controller is also used to control the disconnection of the relay in the distribution circuit and / or adjust the output cooling capacity of the cooling system in the energy storage system through communication instructions based on the collected information of various sensors arranged inside the energy storage system, wherein the cooling system is located outside the intelligent control cabinet.

[0009] Optionally, the communication loop includes a monitoring host computer and a switch, wherein: the monitoring host computer is used to organize and archive the real-time operation data and status information of the energy storage system and / or transmit it to the data acquisition and monitoring control system through the switch.

[0010] Optionally, the communication circuit also includes a metering instrument for monitoring the status of the main circuit of the energy storage system outside the intelligent control cabinet; the main controller in the control circuit is used to compare the operating condition information of the main circuit with the battery information collected from the battery management system when the main circuit is in the shutdown condition for a period of time exceeding a preset period, and issue an instruction to cut off the redundant load in the power supply circuit after confirming that the main circuit is in the shutdown condition based on the comparison information.

[0011] Optionally, the main controller is also used to receive SOC information of the backup battery in the power distribution circuit and SOC information of the battery module used for energy storage in the energy storage system. If the SOC value of the backup battery is lower than a preset backup battery SOC value and the SOC value of the battery module is greater than a preset battery module SOC value, the main controller is also used to determine whether the energy storage system is in an operating state. If the energy storage system is in an operating state, the DC / DC switching power supply in the power distribution circuit is controlled to obtain DC power from the DC switch cabinet to power the uninterruptible power supply in the power distribution circuit. If the energy storage system is in a standby state, the main circuit of the energy storage system is controlled to be closed to power the energy storage system.

[0012] Optionally, the main controller is further used to obtain battery cell characteristic information, and adjust the refrigeration temperature value according to a control strategy based on the battery cell characteristic information, and send the refrigeration temperature value to a cooling system outside the intelligent control cabinet.

[0013] Optionally, the cabinet is provided with an interface, and the power distribution circuit, the control circuit and the communication circuit are connected to the outside through the interface.

[0014] By adopting the above technical solution, since the power distribution circuit, control circuit and communication circuit are located in the same cabinet, that is, multiple critical functions within the energy storage system are integrated into the same cabinet, its structural layout is compact and the electrical coordination is close, which improves the internal space utilization of the energy storage container, saves the cost and space occupied by the wiring between the boxes, strengthens the coordination between the components, and can achieve higher standards, such as high protection level, high resistance to salt spray corrosion, high resistance to electromagnetic interference, wide operating temperature and humidity range, etc., and also effectively improves the application environment of the control part of the energy storage system, shortens the communication distance of each circuit, improves the communication quality, reduces the information transmission delay, increases the system information interaction speed, reduces the number of controllers, and improves the reliability of the energy storage system communication control and the stability of the product.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 It is a topological diagram of the existing energy storage system.

[0018] Figure 2 It is a schematic diagram of the topology of an intelligent control cabinet applied to an energy storage system according to an embodiment of the present disclosure.

[0019] Figure 3 It is a schematic diagram of the circuit principle of an intelligent control cabinet according to an embodiment of the present disclosure.

[0020] Figure 4 Schematic diagram of an I / O interface of an intelligent control cabinet according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0022] Figure 2 FIG. 1 is a topological diagram of an intelligent control cabinet applied to an energy storage system according to an embodiment of the present disclosure. Figure 2 As shown, the intelligent control cabinet includes a cabinet body and a power distribution circuit 10, a control circuit 20 and a communication circuit 30 located in the cabinet body.

[0023] The distribution circuit 10 is connected to the mains power grid, converts the AC power of the mains power grid into DC power for supplying power to the internal components and external loads of the intelligent control cabinet, and converts the high-voltage DC power output by the DC switch cabinet of the energy storage system into DC power for supplying power to the internal components and external loads of the intelligent control cabinet. The distribution circuit 10 is also used to protect remote lines to avoid the risk of lightning surges and to protect the internal components and external loads of the intelligent control cabinet to ensure their stable operation.

[0024] The control circuit 20 is used to obtain various switch quantity status information inside the intelligent control cabinet, and control the on and off of the internal components of the intelligent control cabinet and the external load power supply circuit based on the switch quantity status information;

[0025] The communication loop 30 is used to exchange data with the SCADA outside the intelligent control cabinet.

[0026] By adopting the above technical solution, since the power distribution circuit 10, the control circuit 20 and the communication circuit 30 are located in the same cabinet, that is, the multiple critical functions inside the energy storage system are integrated into the same cabinet, therefore, the structure layout is compact, the electrical coordination is tight, the internal space utilization rate of the energy storage container is improved, the cost and space occupied by the wiring between the boxes are saved, and the coordination between the components is strengthened, so that higher standards can be achieved, such as high protection level, high resistance to salt spray corrosion, high resistance to electromagnetic interference, wide operating temperature and humidity range, etc., and the application environment of the control part of the energy storage system is effectively improved, the communication distance of each circuit is shortened, the communication quality is improved, the information transmission delay is reduced, the system information interaction speed is increased, the number of controllers is reduced, and the reliability of the communication control of the energy storage system and the stability of the product are improved.

[0027] Figure 3 It is a schematic diagram of the circuit principle of an intelligent control cabinet according to an embodiment of the present disclosure.

[0028] like Figure 3 As shown, the power distribution circuit 10 is mainly composed of AC and DC power supplies and protection devices. Figure 3 As shown, the power distribution circuit 10 may include an AC / DC switching power supply 101, a DC / DC switching power supply 102, an uninterruptible power supply (UPS) 103, and a backup battery 104. The power distribution circuit 10 may also include a first lightning arrester 105, a circuit breaker, and a fuse.

[0029] The power distribution circuit 10 is connected to the mains power grid and is converted into a control device power supply voltage through the AC / DC switching power supply 101 to power the internal devices and external loads of the intelligent control cabinet. That is, the AC / DC switching power supply 101 converts the alternating current of the mains power grid into low-voltage direct current and then provides it to the uninterruptible power supply 103, so that the uninterruptible power supply 103 can power the internal devices and external loads of the intelligent control cabinet.

[0030] The DC / DC switching power supply 102 draws power from the DC switch cabinet of the energy storage system, converts the high-voltage DC power output by the DC switch cabinet into low-voltage DC power, and then provides it to the uninterruptible power supply 103, so that it can directly power itself through the DC circuit.

[0031] Further references Figure 3, the AC grid of the mains supplies power to various loads of the energy storage system through the circuit breaker MCB1, and can be divided into multiple power supply branches according to different power supply voltage requirements. For example, the AC voltage of the mains supplies power to the AC / DC switching power supply 101 through the circuit breaker MCB2, and after being converted into a low DC voltage (for example, 24Vdc) by the AC / DC switching power supply 101, it is connected to the UPS 103. When the mains grid supplies power normally, the UPS 103 charges the backup battery 104; when the mains grid loses power, the backup battery 104 supplies power to the main controller 201 and external auxiliary equipment (for example, fire protection system, lighting) through the UPS 103. At the same time, in the DC switch cabinet of the energy storage system, a high-voltage power supply (for example, 1500Vdc) is drawn out, which is connected to the UPS 103 after being stepped down by the DC / DC switching power supply 102, and can be used as the second power supply to supply power to the energy storage system when the AC grid of the mains loses power. The mains power grid can also directly supply power to AC high-power loads (eg, 480Vac), such as a cooling system, via the circuit breaker MCB3.

[0032] In addition, when the mains power grid loses power for a long time, the EMS can remotely send an I / O command signal to UPS 103, and UPS 103 starts to establish a DC low voltage (for example, 24Vdc) through the backup battery 104 to power the energy storage system control equipment and support the continuous operation of the energy storage system.

[0033] Continue to refer Figure 3 , a circuit breaker is arranged in each power distribution circuit, which is used as a switch device to manually close and disconnect the power distribution circuit, and can also play a role in overload protection. In addition, fuses (such as FU1, FU2) can also be equipped for the devices in the power distribution circuit 10 for short circuit protection.

[0034] like Figure 3 As shown, the auxiliary power input port of the intelligent control cabinet is connected to the first lightning arrester 105 through MCB4 to protect the exposed remote line from the risk of lightning surge. In addition, Ethernet communication lightning arresters, such as the second lightning arrester 106 and the third lightning arrester 107, are provided at the external interface of the control loop to ensure that the energy storage system meets the EMC electromagnetic interference index.

[0035] It should be understood by those skilled in the art that Figure 3 The number of circuit breakers, fuses, lightning arresters and control relays shown in the figure is not specified, and the distribution circuit is not completely drawn in the figure. The number of switches can be increased or decreased according to actual application needs.

[0036] Continue to refer Figure 3 The control loop 20 includes a main controller 201 for completing various control functions.

[0037] In some embodiments, the main controller 201 is used to receive information sent by the lower energy storage unit controller outside the intelligent control cabinet and instructions issued by the energy management system outside the intelligent control cabinet, and control the on and off of the main circuit of the energy storage system outside the intelligent control cabinet based on the information sent by the lower energy storage unit controller and the instructions issued by the energy management system. For example, the battery module contains a BMU collector inside, which is used to collect battery cell voltage and temperature information, and upload it to the BECU controller in the battery management system (BMS) control box through the CAN communication bus. The BECU organizes and summarizes the battery cell status information and uploads it to the main controller 201. The main controller 201 can receive information from multiple BECU controllers at the same time, and organize and send it to the monitoring host computer 301 for storage and upload. The main controller 201 also undertakes the task of receiving EMS station control instructions. For example, when the EMS issues a start-up instruction, the main controller 201 can combine the battery cell status information to determine whether the energy storage system meets the start-up conditions. When the conditions are met, the main circuit DC switch cabinet and other isolation devices can be closed in a logical order to connect the main circuit.

[0038] In some embodiments, the main controller 201 can obtain status information of each switch and transmit it back to the EMS, thereby forming a closed-loop control chain.

[0039] In some embodiments, the main controller 201 can also be used to obtain various types of switch status information inside the intelligent control cabinet, such as fuse status, detector status, cabinet door status, emergency stop button, etc., and control the on and off of the internal devices of the intelligent control cabinet and the external load power supply circuit based on the switch status information, thereby realizing control over its power supply.

[0040] In some embodiments, the main controller 201 can also be used to control the disconnection of relays in the power distribution circuit and / or adjust the output cooling capacity of the cooling system in the energy storage system through communication instructions based on the collected information of various sensors arranged inside the energy storage system, wherein the cooling system is located outside the intelligent control cabinet, so that a low power consumption mode can be achieved.

[0041] Continue to refer Figure 3The communication loop 30 includes a monitoring host computer 301 and a switch 302. The monitoring host computer 301 can be a microcomputer of an X86 platform or an ARM platform, and can freely design applications in conjunction with database software. It can organize and archive the real-time operation data and status information of the energy storage system, and can archive it locally according to predetermined rules or transmit it to the cloud monitoring platform via Ethernet, for example, through the switch 302 to SCADA. The customer SCADA monitoring platform can be directly connected to the monitoring host computer 301 to display the status of the energy storage system, thereby realizing remote management and dispatch control. When the energy storage system is far away from the EMS, optical fiber communication can also be used to ensure the stability of control signal transmission.

[0042] like Figure 3 As shown, the communication circuit 30 also includes a meter 303, which is used to monitor the status of the main circuit of the energy storage system outside the intelligent control cabinet. For example, it can monitor whether the main circuit is running, collect environmental temperature and humidity information, and measure the accumulated power of the main circuit and the distribution circuit.

[0043] In some embodiments, the main controller 201 is used to compare the operating condition information of the main circuit with the battery information collected from the battery management system when the main circuit is in a shutdown condition for a period of time exceeding a preset period, and after confirming that the main circuit is in a shutdown condition (i.e., the main circuit has no output current) based on the comparison information, issue an instruction to cut off the redundant load in the power supply circuit, such as issuing a control instruction to cut off the air conditioner and BMS power supply circuit, etc., so as to reduce the energy loss of the energy storage system. Of course, if these devices need to be started, the main controller 201 can directly send a start-up instruction remotely, so that the energy storage system will automatically switch to a normal state, restore the air conditioner and BMS power supply, and execute the start-up instruction.

[0044] In some embodiments, the main controller 201 can also be used to receive the SOC information of the backup battery 104 and the SOC information of the battery module used for energy storage in the energy storage system. If the SOC value of the backup battery 104 is lower than the preset backup battery SOC value and the SOC value of the battery module is greater than the preset battery module SOC value, this means that the SOC of the backup battery is in a low state and needs to be charged, while the SOC of the battery module used for energy storage is not in a low state and can supply power to the outside. In this case, the main controller 201 will determine whether the energy storage system is in operation. If the energy storage system is in operation, the main controller 201 controls the DC / DC switching power supply 102 to obtain DC power from the DC switch cabinet to power the uninterruptible power supply 103. The DC switch cabinet is connected to the battery module for energy storage to draw power from the battery module. By adopting the above technical solution, it is ensured that the UPS input power will not be lost, so it can be determined that the cause of the fault is a UPS battery failure or a charging circuit failure; if the main controller 201 determines that the energy storage system is in standby mode, this means that the city power is lost and the load is being powered by the backup battery 104 at this time, and the power of the backup battery 104 is close to the low power control, then in this case, the main controller 201 will upload an alarm signal and control the main circuit of the energy storage system to close to power the energy storage system. Of course, it can also be set to cut off all power supply circuits of the energy storage system when the UPS power is low. By adopting the above technical solution, it is possible to charge the backup battery in the intelligent control cabinet when the SOC of the backup battery is in a low state, and protect the battery module used for energy storage in the energy storage system to prevent the battery module from supplying power to the outside when the SOC value is too low.

[0045] In some embodiments, the main controller 201 can also be used to obtain battery cell characteristic information, and adjust the cooling temperature value according to the control strategy based on the battery cell characteristic information, and send the cooling temperature value to the cooling system outside the intelligent control cabinet. In this way, the temperature adjustment of the cooling system can be achieved, so that as the operating conditions of the energy storage system change, the output temperature of the cooling system also changes accordingly.

[0046] Figure 4 1 is a schematic diagram of an I / O interface of an intelligent control cabinet according to an embodiment of the present disclosure. That is, an interface is provided on the cabinet, and the power distribution circuit 10, the control circuit 20 and the communication circuit 30 are connected to the outside through the interface. Figure 4As shown, the intelligent control cabinet includes a mains power supply input port applied to the power distribution circuit 10 for supplying power to the AC / DC switching power supply 101, an AC load distribution interface for directly supplying power to the AC high-power load, a DC power supply port for obtaining high-voltage DC power from the DC / DC switching power supply 102, a DC load distribution port for providing low-voltage DC power to the load, a meter sampling port for facilitating the metering instrument 303 to collect the main circuit status signal, an optical fiber communication port and an Ethernet communication port for facilitating communication with the EMS, and an RS485 communication interface and a CAN communication interface for facilitating communication with the BMS, etc. It should be understood by those skilled in the art that the functions of these interfaces can be defined according to customer needs to achieve hardware linkage interaction with the station EMS controller. For example, if a single energy storage system has an insulation fault, multiple energy storage systems can be simultaneously shut down through a hardware emergency stop signal. In addition, the number of interfaces can be adjusted according to the application requirements of different energy storage systems, and interfaces such as switch quantity control, auxiliary power distribution, and CAN communication bus can be reserved for the energy storage system to facilitate the maintenance and upgrade of the energy storage system.

[0047] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0049] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An intelligent control cabinet for energy storage system, It is characterized in that It includes a cabinet and a power distribution circuit, a control circuit and a communication circuit located in the cabinet, wherein: The power distribution circuit is connected to the mains power grid, converts the alternating current of the mains power grid into direct current for supplying power to the internal devices and external loads of the intelligent control cabinet, and converts the high-voltage direct current output by the DC switch cabinet of the energy storage system into direct current for supplying power to the internal devices and external loads of the intelligent control cabinet. The power distribution circuit is also used to protect the remote line and the internal devices and external loads of the intelligent control cabinet; the power distribution circuit includes an uninterruptible power supply and a backup battery. When the mains power grid is powered normally, the uninterruptible power supply charges the backup battery. When the mains power grid loses power, the backup battery supplies power to the internal devices and external loads of the intelligent control cabinet through the uninterruptible power supply; The control circuit is used to obtain various switch quantity status information inside the intelligent control cabinet, and control the on and off of the internal components of the intelligent control cabinet and the external load power supply circuit based on the switch quantity status information; The communication circuit is used to exchange data with the data acquisition and monitoring control system outside the intelligent control cabinet; The control loop includes a main controller, wherein: the main controller is used to receive information sent by the lower energy storage unit controller outside the intelligent control cabinet and instructions issued by the energy management system outside the intelligent control cabinet, and control the on and off of the main loop of the energy storage system outside the intelligent control cabinet based on the information sent by the lower energy storage unit controller and the instructions issued by the energy management system; the main controller is also used to obtain various types of switch quantity status information inside the intelligent control cabinet, and control the on and off of the internal devices of the intelligent control cabinet and the external load power supply circuit based on the switch quantity status information; the main controller is also used to receive the distribution circuit The main controller is used to determine whether the energy storage system is in operation if the SOC value of the backup battery is lower than the preset SOC value of the backup battery and the SOC value of the battery module is greater than the preset SOC value of the battery module. If the energy storage system is in operation, the DC / DC switching power supply in the power distribution circuit is controlled to obtain DC power from the DC switch cabinet to power the uninterruptible power supply in the power distribution circuit. If the energy storage system is in standby mode, the main circuit of the energy storage system is controlled to be closed to power the energy storage system.

2. The intelligent control cabinet according to claim 1, It is characterized in that The power distribution circuit also includes an AC / DC switching power supply and a DC / DC switching power supply, wherein: The AC / DC switching power supply converts the alternating current of the mains power grid into low-voltage direct current and then supplies it to the uninterruptible power supply; The DC / DC switching power supply converts the high-voltage direct current output by the DC switch cabinet into low-voltage direct current and then provides it to the uninterruptible power supply; The power distribution circuit is also used to directly provide the AC power of the commercial power grid to the AC high-power load outside the intelligent control cabinet.

3. The intelligent control cabinet according to claim 1, It is characterized in that The power distribution circuit includes a first lightning arrester, a circuit breaker and a fuse, wherein: The first lightning arrester is used to protect the remote line from lightning surge risk; The circuit breaker is arranged in the power distribution circuit for overload protection; The fuse is used to provide short-circuit protection for components in the power distribution circuit.

4. The intelligent control cabinet according to claim 1, It is characterized in that The main controller is also used to control the disconnection of the relay in the distribution circuit and / or adjust the output cooling capacity of the cooling system in the energy storage system through communication instructions based on the collected information of various sensors arranged inside the energy storage system, wherein the cooling system is located outside the intelligent control cabinet.

5. The intelligent control cabinet according to claim 1, It is characterized in that The communication loop includes a monitoring host computer and a switch, wherein: The monitoring host computer is used to organize and archive the real-time operation data and status information of the energy storage system and / or transmit it to the data acquisition and monitoring control system through the switch.

6. The intelligent control cabinet according to claim 5, It is characterized in that The communication circuit also includes a meter for monitoring the status of the main circuit of the energy storage system outside the intelligent control cabinet; The main controller in the control loop is used to compare the operating condition information of the main loop with the battery information collected from the battery management system when the duration of the main loop in the shutdown condition exceeds a preset duration, and after confirming that the main loop is in the shutdown condition based on the comparison information, issue an instruction to cut off the redundant load in the power supply circuit.

7. The intelligent control cabinet according to claim 1, It is characterized in that The main controller is also used to obtain battery cell characteristic information, and adjust the refrigeration temperature value according to the control strategy based on the battery cell characteristic information, and send the refrigeration temperature value to the cooling system outside the intelligent control cabinet.

8. The intelligent control cabinet according to claim 1, It is characterized in that The cabinet is provided with an interface, and the power distribution circuit, the control circuit and the communication circuit are connected to the outside through the interface.

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