Remote upgrading system and method for energy storage equipment of energy storage power station

Abstract

The invention provides a remote upgrading system and method for energy storage equipment of an energy storage power station, which comprises a cloud platform, an energy management control unit (EMU) and the energy storage equipment, and is characterized in that the cloud platform is used for receiving an upgrading file uploaded by a user and issuing a downloading instruction containing a file downloading URL, a file size and a CRC32 check code to the EMU; the EMU is used for downloading an upgrading file from the cloud platform, performing format, size and CRC32 triple verification on the file, executing system self-inspection before upgrading, executing staged shutdown protection strategies in sequence, issuing an upgrading instruction to the energy storage equipment and recovering a system state; and the energy storage equipment is used for downloading the upgrading file from the EMU and finishing firmware updating.

Description

Technical Field

[0001] The present invention belongs to the technical field of power energy storage system control, and particularly relates to a remote upgrade system and method for energy storage devices in an energy storage power station, including a remote upgrade system, strategy, and method for energy storage devices such as a battery management system (BMS) and an inverter management system (PCS). Background Art

[0002] Currently, energy storage power stations are widely deployed due to the demands of new energy consumption, power grid frequency modulation, etc. The project characteristics are that the site locations are scattered or even remote, and manual on-site maintenance faces problems such as high costs and slow response. With the expansion of the energy storage system scale and the acceleration of software function iteration, remote upgrade technology has become an essential ability for the operation and maintenance of energy storage devices.

[0003] In the prior art, the remote upgrade of energy storage devices mostly relies on a one-way communication mechanism in which the device polls the cloud platform, lacking dynamic perception and adaptation to the real-time operating state of the system. For example, during the upgrade process, if the device is in a charging or discharging state or executing a planned curve task, directly interrupting the operation may cause safety hazards such as overloading of the energy storage unit and power grid fluctuations. In addition, existing solutions usually only rely on a single file verification mechanism (such as CRC verification), lacking multiple verifications for file integrity, version compatibility, etc., and are prone to upgrade failures due to network transmission anomalies or version conflicts. More critically, traditional methods do not design a hierarchical protection strategy and a state rollback mechanism. Once the upgrade is interrupted, the system cannot automatically return to a stable state and requires manual intervention for repair, further increasing the operation and maintenance costs and risks.

[0004] Therefore, there is an urgent need for a remote upgrade solution that takes into account both the safety of system operation and the reliability of upgrade to solve the problems of insufficient flexibility, weak verification mechanism, and lack of fault tolerance ability in the prior art. Summary of the Invention

[0005] Aiming at the defects and deficiencies existing in the prior art, the present invention provides a remote upgrade system and method for energy storage devices in an energy storage power station, and realizes safe and reliable remote upgrade through the following innovative designs: Phased shutdown protection strategy: Before the upgrade, execute the planned curve task exit, PCS zero power → shutdown → BMS high-voltage operation in sequence to force the device to exit the operating state, avoiding power grid fluctuations or device damage caused by the upgrade; Multi-protocol collaboration and hierarchical control: The cloud platform and the energy management control unit (EMU) interact commands based on the MQTT protocol, and the EMU and the energy storage device transmit data through the IEC104 / IEC61850 protocol. The file transfer uses the HTTP protocol and supports breakpoint resumption, taking into account both real-time performance and reliability; Dynamic timeout and forced rollback mechanism: Set timeout thresholds of 5 minutes, 5 minutes, and 15 minutes for file download, ready waiting, and upgrade execution respectively. When the timeout occurs, the system will be automatically terminated and restored to the state before the upgrade. Multiple verification and version control: The upgrade file needs to pass triple verification of format compatibility, size matching, and CRC32 verification. After the upgrade, the cloud platform actively verifies whether the device version number is consistent with the preset target to prevent incorrect upgrades. Business decoupling and state restoration: Exit the planned curve task and record the system operation status (remote / local mode, device switch status) before the upgrade. After the upgrade, accurately restore to the original state to ensure business continuity.

[0006] Through system self-check, protocol layering, verification redundancy, and status management, the present invention realizes the flexibility and security of remote upgrade while ensuring the stable operation of the energy storage system, and significantly reduces the maintenance cost.

[0007] The technical solution specifically adopted by the present invention to solve its technical problems is as follows: A remote upgrade system for energy storage devices in an energy storage power station, including a cloud platform, an energy management control unit EMU, and energy storage devices: The cloud platform is used to receive the upgrade file uploaded by the user and send a download instruction containing the file download URL, file size, and CRC32 verification code to the EMU; The EMU is used to download the upgrade file from the cloud platform, perform triple verification of the file format, size, and CRC32, perform system self-check before the upgrade, execute the phased shutdown protection strategy in sequence, and send an upgrade instruction and restore the system state to the energy storage device; The energy storage device is used to download the upgrade file from the EMU and complete the firmware update.

[0008] Further, the cloud platform and the EMU interact through the MQTT protocol, and the EMU and the energy storage device interact through the IEC104 or IEC61850 protocol; The file transfer uses the HTTP protocol and supports breakpoint resume.

[0009] Further, the timeout limits for file download, ready waiting, and upgrade execution are 5 minutes, 5 minutes, and 15 minutes respectively. When the timeout occurs, it will be forced to roll back to the state before the upgrade.

[0010] Further, the planned curve task needs to be exited and the system operation mode needs to be recorded before the upgrade. After the upgrade, restore the BMS high voltage, PCS power-on, and planned curve functions; The cloud platform verifies the device version number after the upgrade, and the upgrade instruction types support BAU, BCU, PCS, and expandable devices.

[0011] Further, the file download URL is encoded using Base64 to avoid network escape problems.

[0012] And, a method for remotely upgrading energy storage devices in an energy storage power station, comprising the following steps: Receive an upgrade file through the cloud platform, and send a download instruction including the file download URL, file size, and CRC32 checksum to the Energy Management Control Unit (EMU); The EMU downloads the upgrade file from the cloud platform and performs format, size, and CRC32 checks on the file; The EMU checks whether the energy storage device is in a charging or discharging state. If not, perform the following operations in sequence: terminate the planned curve task, set the PCS power to zero, turn off the PCS, and lower the high voltage of the BMS; After the cloud platform confirms that the EMU is ready, send an upgrade instruction. The energy storage device downloads the upgrade file from the EMU and completes the firmware update; After the upgrade is completed, the EMU restores the system to the operating state before the upgrade.

[0013] Further, the cloud platform and the EMU interact instructions through the MQTT protocol, and the EMU and the energy storage device transmit control signals through the IEC104 or IEC61850 protocol; File transfer uses the HTTP protocol and supports resume from breakpoint.

[0014] Further, the file download URL is encoded using Base64; After the upgrade, the cloud platform verifies the version number of the energy storage device. If it is inconsistent with the predefined target version number, the upgrade is determined to fail.

[0015] Further, the file download timeout threshold is 5 minutes, the time limit for the EMU to wait for instructions after it is ready is 5 minutes, and the total execution time of the upgrade is 15 minutes. If it times out, it will be forced to roll back to the state before the upgrade.

[0016] Further, record the system operating state before the upgrade, including the planned curve mode, PCS on / off state, and BMS high voltage state; The recovery operations after the upgrade include: raising the high voltage of the BMS, turning on the PCS, and resuming the planned curve task.

[0017] Compared with the prior art, the present invention and its preferred solutions at least include the following beneficial effects: Systematic safety upgrade guarantee: Through the phased shutdown protection strategy (terminate the planned curve task → PCS zero power → shutdown → BMS lower high voltage), force the device to safely exit the operating state, effectively avoid physical damage to the device or grid operation fluctuations caused by the upgrade, and significantly improve the safety of the upgrade process; Improved communication and file transfer reliability: Based on a multi - protocol hierarchical architecture (the cloud platform - EMU uses the MQTT protocol, EMU - device uses the IEC protocol, and file transfer uses the HTTP protocol), it takes into account real - time instruction interaction and resume - interrupted transfer capabilities, reducing the interference of network anomalies on the upgrade process; Enhanced controllability of the upgrade process: Through a phased dynamic timeout mechanism (timeout thresholds for the download, preparation, and upgrade phases) and a forced rollback design, it prevents the system from being stuck due to the upgrade and becoming unavailable for a long time, ensuring a quick recovery to stable operation in abnormal situations; Guaranteed reliability of upgrade results: Combining triple verification of file format / size / CRC32, Base64 encoding to prevent escape characters, and dynamic comparison of version numbers, it verifies the integrity of files throughout the entire link from transmission to execution, preventing upgrade accidents caused by incorrect files or version conflicts; Implementation of seamless business upgrade: By decoupling business before upgrade (exiting the planned curve task) and precisely restoring the state after upgrade (restoring BMS / PCS parameters and reloading the planned curve), it minimizes the impact on the core functions of the energy storage system and ensures business continuity.

[0018] Through the above - mentioned technical means, the present invention realizes the flexibility, security, and maintainability of remote upgrades while ensuring the stable operation of the energy storage system, providing reliable support for the intelligent operation and maintenance of distributed energy storage power stations. Brief Description of the Drawings

[0019] The following further elaborates on the present invention in conjunction with the drawings and specific implementation manners: Figure 1 It is the system structure diagram of an embodiment of the present invention.

[0020] Figure 2 It is the processing logic flow diagram of an embodiment of the present invention. Detailed Implementation Manner

[0021] To make the features and advantages of the present invention more obvious and understandable, specific embodiments are hereinafter given and described in detail as follows: It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0022] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0023] In view of the defects and deficiencies existing in the prior art, the purpose of the embodiments of the present invention is to provide a remote upgrade system and method for energy storage devices in an energy storage power station. The technical problem to be solved is that when remotely upgrading the energy storage devices in an energy storage power station, the energy management control unit verifies and checks the state of the energy storage system, takes necessary protection measures for the system, and ensures the stable and reliable operation of the system.

[0024] Among them, the energy management control unit (EMU), as the link between the BMS, PCS, and cloud platform, interacts with the cloud platform using the MQTT protocol. It can not only upload device data in real time and receive instructions sent from the cloud, but also perform corresponding control operations on the BMS and PCS. The cloud can remotely upgrade specified energy storage devices according to user requirements.

[0025] The EMU is responsible for collecting data of energy storage devices and forwarding it to the cloud platform, receiving cloud platform instructions, and providing file transfer services. Another important function of it is the planned curve, which manages the charge and discharge tasks of the energy storage system, including remote / local modes. In the remote mode, it receives the charge and discharge power from an external system and distributes it to each energy storage unit. In the local mode, it distributes and executes the charge and discharge according to a pre-specified charge and discharge plan.

[0026] The solution of the embodiments of the present invention is based on a cloud platform, an energy management control unit (EMU), and energy storage devices. The energy storage devices include a battery management system (BMS) and an inverter control system (PCS), etc. The present invention is based on data transmission between the cloud collection service and the energy management control unit through the MQTT protocol, and data transmission between the energy management control unit and the energy storage devices through the IEC104 or IEC61850 protocol. The user uploads the file to be upgraded to the cloud platform. The cloud platform sends a file transfer instruction to the specified energy management control unit. The energy management control unit downloads the specified upgrade file from the cloud according to the instruction. After the download is completed, it determines whether it can be upgraded currently, and triggers system protection strategies, including preset actions such as power regulation function exit and device power-off. After receiving the ready response, the cloud platform sends an upgrade instruction. The energy management control unit notifies the south-facing energy storage devices to upgrade according to the instruction. The energy storage devices download the upgrade file from the energy management control unit and upgrade. Compared with traditional remote upgrade technologies, the significant feature of the present invention is that before upgrading the energy storage devices, the energy management control unit performs self-check on the energy storage system and implements system protection strategies. While taking into account that the business functions of the energy storage system are not affected, it realizes the remote upgrade of energy storage devices, ensures the stable and reliable operation of the energy storage system, and reduces the maintenance cost of system upgrade at the same time.

[0027] In its specific design: As Figure 1 shown, the remote upgrade system for energy storage devices includes a cloud platform, an energy management control unit (EMU), and energy storage devices; The cloud platform includes a data acquisition service and a file transfer service. The data acquisition service is responsible for receiving data and issuing commands, and the file transfer service provides file download services and supports resume from breakpoint. The Energy Management Control Unit (EMU) is responsible for collecting data of the energy storage device and forwarding it to the cloud platform, receiving instructions from the cloud platform, and providing file transfer services. Another important function is the planned curve, which manages the charge and discharge tasks of the energy storage system, including remote / local modes. In the remote mode, the charge and discharge power received from the external system is distributed to each energy storage unit. In the local mode, the charge and discharge are executed according to the pre-specified charge and discharge plan. EMU and the cloud platform interact data and instructions through the MQTT protocol.

[0028] The energy storage device includes a Battery Management System (BMS), an Inverter Control System (PCS), fire protection, liquid cooling, electricity meters, etc. The energy storage device interacts data with the EMU through the IEC104 or IEC61850 protocol and does not directly interact with the cloud platform. EMU downloads the upgrade file from the cloud platform and has the function of resuming from breakpoint. BMS and PCS download the upgrade file from EMU and have the function of resuming from breakpoint. EMU forwards the relevant measurement points of remote upgrade to the cloud platform in real time. The relevant measurement points include but are not limited to: upgrade preparation status, BMS upgrade status, PCS upgrade status, BMS version number, PCS version number. The enumerated values of the upgrade preparation status include: 0 - no feedback, 1 - download failed, 2 - download successful, 3 - verification failed, 4 - verification successful, 5 - shutdown failed, 6 - shutdown successful, 7 - ready.

[0029] As Figure 2 shown, the specific process of the method in the embodiment of the present invention includes: First, according to the upgrade requirements, the user uploads the upgrade file to the cloud platform and issues a download file instruction to the specified EMU from the cloud platform. The instruction content includes: file download URL, file size, CRC32 check code. To avoid escape caused by network transmission, the URL is encoded using the Base64 algorithm.

[0030] Second, EMU decodes the received URL and downloads the upgrade file from the cloud platform using the HTTP protocol. The download of the upgrade file supports resume from breakpoint.

[0031] If the download is not completed within the specified time limit of 5 minutes, the upgrade is terminated and the status of download failed is reported.

[0032] After the file download is completed, check the format, size, and CRC32 check code of the upgrade file. It is required to meet all the following conditions simultaneously: the format is in the supported list, the actual file size is equal to the instruction, and the CRC32 check code matches the instruction. Otherwise, the status of download failed is reported.

[0033] After the file verification passes, check the current status of the planned curve. If it is in the charging or discharging state, terminate the upgrade and send the status verification failure. Otherwise, record the following system operating status before the upgrade: the remote / local mode of the planned curve operation, the on / off state of the PCS, and the high-voltage state of the BMS.

[0034] III. Protection strategy before the EMU upgrade: Exit the planned curve task. If the exit fails, terminate the upgrade and send the status shutdown failure. The system resumes to the state before the upgrade. Set the PCS to zero power. If the setting fails, terminate the upgrade and send the status shutdown failure. The system resumes to the state before the upgrade. Shut down the PCS. Set the operating state of the PCS to shutdown. If the setting fails, terminate the upgrade and send the status shutdown failure. The system resumes to the state before the upgrade. Lower the high voltage of the BMS. Set the high-voltage state of the BMS to lower high voltage. If the setting fails, terminate the upgrade and send the status shutdown failure. The system resumes to the state before the upgrade.

[0035] After all protection strategies are successfully implemented, send the ready status.

[0036] IV. After receiving the ready status, the cloud platform sends an upgrade instruction to the EMU. The instruction types include BAU upgrade, BCU upgrade, PCS upgrade, etc., and the types can be extended.

[0037] V. After receiving the upgrade instruction, the EMU checks whether the current system status meets the upgrade conditions. If it meets, it sends an upgrade instruction to the corresponding energy storage devices such as the BMS and PCS in the south direction according to the instruction type. If the EMU does not receive the upgrade instruction within 5 minutes after being ready, terminate the upgrade and the system resumes to the state before the upgrade.

[0038] VI. After receiving the upgrade instruction, the energy storage device uses the HTTP protocol to download the upgrade file from the EMU, verify the file, and perform the upgrade and update.

[0039] During the upgrade process, the energy storage device updates and sends the upgrade status, failure reason, and version number to the EMU in real time, and the EMU sends them to the cloud platform in real time.

[0040] VII. The cloud platform determines the upgrade result: If it receives the upgrade failure status, or does not receive the upgrade completion status within the set 15 minutes, it is judged as an upgrade failure. If it receives the upgrade completion status and the compared version number is consistent with the expected value, the upgrade is successful; otherwise, the upgrade fails.

[0041] Whether the upgrade is successful or failed, an upgrade end instruction is sent.

[0042] VIII. After the EMU receives the upgrade completion instruction, it resumes the system operating state: The BMS high-voltage state is restored to the state before the upgrade; The PCS operating state is restored to the state before the upgrade; The planned curve function is enabled, and the operating mode is set to the mode before the upgrade.

[0043] If the EMU does not receive the upgrade completion instruction within 15 minutes after sending the upgrade instruction, it will be forced to restore to the state before the upgrade.

[0044] Among them, the corresponding upgrade steps are as follows: I. According to the upgrade requirements, the user uploads the upgrade file to the cloud platform, and sends a download file instruction to the specified EMU from the cloud platform. The instruction content includes: file download URL, file size, CRC32 checksum. In order to avoid escapes caused by network transmission, the URL is encoded and decoded using the Base64 algorithm; II. After receiving the download file instruction, the EMU downloads the file from the cloud platform. After successful download, it performs upgrade preparation operations, including upgrade self-check and system protection strategy. After preparation is completed, it sends the upgrade status as ready; III. The cloud platform can send the upgrade instruction only after receiving the ready state. The instruction types include BAU upgrade, BCU upgrade, PCS upgrade, etc. The types can be extended. After receiving the instruction, the EMU sends the upgrade instruction to the corresponding energy storage devices such as BMS and PCS in the south according to the instruction type; IV. After receiving the upgrade instruction, the BMS or PCS downloads the upgrade file from the EMU and verifies the version. After verification is passed, it performs the upgrade update; V. After the cloud platform determines whether the upgrade is successful or failed, it sends an upgrade completion instruction to the EMU, and the EMU restores the system operating state to the state before the upgrade.

[0045] The corresponding upgrade self-check and system protection strategy are as follows: I. Check the format, size, and CRC32 checksum of the downloaded upgrade file, which need to meet the following conditions at the same time: the format is in the support list, the actual file size is equal to the instruction, and the CRC32 checksum matches the instruction. Otherwise, the upload status is download failed; II. Check the current planned curve state. If it is in the charge and discharge state, terminate the upgrade and send the upload status as verification failed. Otherwise, record the following system operating state before the upgrade: planned curve operation remote / local mode, PCS on / off state, BMS high-voltage state; III. Exit the planned curve task. If the exit fails, terminate the upgrade, send the upload status as shutdown failed, and the system is restored to the state before the upgrade; IV. Set the PCS to zero power, set the operating power of the PCS to zero. If the setting fails, terminate the upgrade, send the upload status as shutdown failed, and the system is restored to the state before the upgrade; 5. Shutdown the PCS, set the operating status of the PCS to shutdown. If the setting fails, terminate the upgrade, report the status of shutdown failure, and the system will be restored to the state before the upgrade. 6. Lower the high voltage of the BMS, set the high voltage status of the BMS to lower high voltage. If the setting fails, terminate the upgrade, report the status of shutdown failure, and the system will be restored to the state before the upgrade. 7. The file download is limited to 5 minutes. If the download is not completed within the timeout, report the status of download failure. 8. After the EMU reports the ready status, wait for the upgrade instruction. The waiting time is limited to 5 minutes. If the command is not received within the timeout, terminate the upgrade, and the system will be restored to the state before the upgrade. 9. After the EMU issues the upgrade command, wait for the upgrade end command. The waiting time is limited to 15 minutes. If the command is not received within the timeout, terminate the upgrade, and the system will be restored to the state before the upgrade. As an optimal solution of this embodiment, the energy storage device BMS and PCS system in the south direction of the EMU need to support the following functions: Version measurement point reporting: Real-time report the current firmware version number to the EMU through the IEC protocol. File download interface: Support downloading upgrade files from the EMU through the HTTP protocol and have the ability to resume interrupted downloads. Instruction response mechanism: After receiving the upgrade instruction issued by the EMU, automatically trigger the local upgrade process and feedback the status after the upgrade is completed.

[0046] As an optimal solution of this embodiment, after the upgrade is completed, the EMU restores the system operation in the following order: Raise the high voltage of the BMS: Restore the high voltage power supply status of the BMS. Power on the PCS: Restart the PCS device. PCS power setting: Restore the PCS operating power to the set value before the upgrade. Input the planned curve function: Reactivate the planned curve task according to the recorded mode (remote / local) before the upgrade.

[0047] As an optimal solution of this embodiment, the user can perform the following operations on the cloud platform: Specify EMU upgrade: Select the energy storage device associated with a single EMU and issue the upgrade instruction. Batch upgrade: Check multiple EMUs or device groups, and the cloud platform triggers the upgrade process in sequence according to the queue to avoid system overload caused by concurrent operations.

[0048] As an optimal solution of this embodiment, the user can check multiple EMUs or device groups on the cloud platform, and the platform triggers the upgrade process in sequence according to the queue to avoid system overload caused by concurrent operations. As a preferred solution of this embodiment, after the upgrade is completed, the EMU resumes system operation in the following order: 1. The BMS powers on high voltage. 2. The PCS is powered on. 3. The PCS power setting is restored to the value before the upgrade. 4. The planned curve function is re-enabled in the mode before the upgrade. As a preferred solution of this embodiment, the BMS and PCS need to periodically report the version number through the ASDU address 0x1001 of the IEC104 protocol and support resume-downloading the upgrade file through the HTTP protocol.

[0049] The solution of the embodiment of the present invention sends a download file and a system upgrade instruction to the energy management control unit through the cloud platform, and the energy management control unit manages and controls the remote upgrade of the energy storage device. As the link between the energy storage device and the cloud platform, the energy management control unit performs necessary self-checks and strategy protection on the energy storage system before the upgrade, remotely upgrades the energy storage device without affecting the system business operation, and at the same time restores the system operation state when the upgrade is abnormally terminated. This policy method reduces the maintenance cost of system upgrade on the basis of ensuring the stable and reliable operation of the system, and fully reflects the reliability and stability of this upgrade system.

[0050] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0051] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

[0052] The present invention is not limited to the above-mentioned optimal implementation manner. Anyone can obtain various other forms of a remote upgrade system and method for energy storage devices in an energy storage power station under the inspiration of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the present invention.

Claims

1. A remote upgrade system for energy storage devices in an energy storage power station, characterized in that, It includes a cloud platform, an Energy Management Control Unit (EMU), and energy storage devices: The cloud platform is used to receive the upgrade files uploaded by users and send a download instruction containing the file download URL, file size, and CRC32 checksum to the EMU; The EMU is used to download the upgrade files from the cloud platform, perform triple checks on the file format, size, and CRC32, conduct a system self-check before the upgrade, execute a phased shutdown protection strategy in sequence, and send an upgrade instruction to the energy storage devices and restore the system state; The energy storage devices are used to download the upgrade files from the EMU and complete the firmware update.

2. The remote upgrade system for energy storage devices in an energy storage power station according to claim 1, wherein: The cloud platform and the EMU interact through the MQTT protocol, and the EMU and the energy storage devices interact through the IEC104 or IEC61850 protocol; The file transfer uses the HTTP protocol and supports resume from breakpoint.

3. A remote upgrade system for energy storage devices in an energy storage power station according to claim 1, characterized in that: The timeout limits for file download, ready waiting, and upgrade execution are 5 minutes, 5 minutes, and 15 minutes respectively. If it times out, it will be forced to roll back to the state before the upgrade.

4. The remote upgrade system for energy storage devices in an energy storage power station according to claim 1, wherein: Before the upgrade, it is necessary to exit the planned curve task and record the system operation mode. After the upgrade is completed, the BMS high voltage, PCS startup, and planned curve functions are restored; The cloud platform checks the device version number after the upgrade, and the upgrade instruction types support BAU, BCU, PCS, and expandable devices.

5. The remote upgrade system for energy storage equipment of an energy storage power station according to claim 1, wherein: The file download URL uses Base64 encoding to avoid network escape problems.

6. A method for remotely upgrading energy storage equipment in an energy storage power station, characterized in that, It includes the following steps: Receive the upgrade files through the cloud platform and send a download instruction containing the file download URL, file size, and CRC32 checksum to the Energy Management Control Unit (EMU); The EMU downloads the upgrade files from the cloud platform and checks the file format, size, and CRC32; The EMU checks whether the energy storage devices are in the charge and discharge state. If not, perform the following operations in sequence: terminate the planned curve task, set the PCS power to zero, turn off the PCS, and lower the high voltage of the BMS; After the cloud platform confirms that the EMU is ready, it sends an upgrade instruction. The energy storage devices download the upgrade files from the EMU and complete the firmware update; After the upgrade is completed, the EMU restores the system to the operating state before the upgrade.

7. The remote upgrade method for energy storage devices in an energy storage power station according to claim 6, wherein: The cloud platform and the EMU interact instructions through the MQTT protocol, and the EMU and the energy storage devices transmit control signals through the IEC104 or IEC61850 protocol; The file transfer uses the HTTP protocol and supports resume from breakpoint.

8. The remote upgrade method for energy storage devices in an energy storage power station according to claim 6, wherein: The file download URL uses Base64 encoding; The cloud platform checks the version number of the energy storage devices after the upgrade. If it is inconsistent with the predefined target version number, the upgrade is determined to fail.

9. A method for remotely upgrading an energy storage device of an energy storage power station according to claim 6, characterized in that: The file download timeout threshold is 5 minutes, the waiting time limit for the EMU to wait for instructions after it is ready is 5 minutes, and the total upgrade execution duration is 15 minutes. If it times out, it will be forced to roll back to the state before the upgrade.

10. A method for remotely upgrading an energy storage device of an energy storage power station according to claim 6, characterized in that: Before the upgrade, record the system operation status, including the planned curve mode, the PCS on / off state, and the BMS high-voltage state; The recovery operations after the upgrade include: turning on the high voltage on the BMS, turning on the PCS, and re-investing the planned curve task.

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