WO2024066925A1 - Management system and method for power supply and energy storage battery network - Google Patents

Abstract

A management system and method for a power supply and energy storage battery network. The system comprises multiple groups of energy storage batteries, a site control unit (SCU) and a centralized supervision unit (CSU), wherein: the multiple groups of energy storage batteries form one or more battery clusters, each battery cluster being connected to the SCU through an RS485 interface; the CSU is used for managing the power supply and connected to the SCU through a northbound interface so as to send power supply data to the SCU; and the SCU is used for carrying out battery management on the multiple groups of energy storage batteries, is connected to the CSU through a southbound interface so as to obtain power supply data of the CSU, and is connected to a network management system through an Ethernet interface so as to send the battery data and the power supply data of the multiple groups of energy storage batteries to the network management system and receive an instruction from the network management system. The power supply control unit (CSU) is responsible for the power management service, and the site control unit (SCU) is responsible for the battery management service. Therefore, power management is decoupled from battery management, and problems related to version coupling of the power supply and the batteries are solved.

Description

Management system and method for power supply and energy storage battery networking

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure is based on Chinese patent application 202211217973.1, filed on September 30, 2022, entitled “Management system and method for power supply and energy storage battery networking”, and claims the priority of the patent application, and all the contents disclosed therein are incorporated into this disclosure by reference.

Technical Field

The present disclosure relates to the field of battery energy storage, and in particular, to a management system and method for networking power sources and energy storage batteries.

Background technique

With the large-scale construction of 5G and the general trend of "lead out and lithium in" under the background of dual carbon, the installed scale of communication energy storage lithium batteries is expanding day by day, and the market demand for multi-group lithium battery parallel scenarios is growing rapidly. For lithium battery parallel scenarios, a common method is to connect lithium batteries in parallel through the controller area network (CAN) bus and the RS485 bus, and at the same time, the power supply is connected to the same bus with the battery pack through RS485, and the power supply manages the battery. However, this method requires that in addition to realizing the power supply business, the power supply also needs to be able to connect and manage lithium batteries, resulting in a strong coupling between the power supply business and the battery business. Due to the large number of lithium battery manufacturers at present and the lack of a unified standard in the definition of the protocol, the power supply has to be compatible with many lithium battery models, resulting in a large number of customized versions, resulting in an explosion of power supply versions. In addition, due to signal attenuation, the number of RS485 master-slave parallel operations cannot exceed 32 groups. Therefore, the maximum number of lithium batteries that can be supported by this parallel networking structure is 32 groups, which is difficult to meet the current large-scale networking requirements. One improvement idea is to expand the power supply access point or add external serial port repeaters and other equipment to enhance the access capability of the power supply equipment. However, the power supply itself is limited by its standard form, and the access capability expansion is very limited; it cannot support the large-scale lithium battery networking needs; external repeaters and other solutions cannot achieve parallel management on the power supply side, and the efficiency is difficult to meet the battery management requirements; in addition, the above improvement ideas fail to solve the problem of coupling between power supply and battery services, and the impact on power supply is still very large. Another idea is to use the site collector equipment to connect both the battery and the power supply to the collector. This idea solves the problem of large-scale battery networking; but since the main purpose of the collector is site access, there is no basic service such as battery current sharing, and software customization is required; in addition, the cost of the site collector is usually much higher than that of the power supply, and the cost competitiveness is insufficient when there are only a few batteries.

From the above analysis, it can be seen that the key to the networking of communication energy storage and communication power supply lies in solving the problem of large-scale communication energy storage battery networking with more than 32 groups and solving the problem of decoupling power supply and battery business.

Summary of the invention

The embodiments of the present disclosure provide a management system and method for a power supply and energy storage battery network, so as to at least solve the problem of decoupling power supply and battery services in the related art.

According to an embodiment of the present disclosure, a management system for power supply and energy storage battery networking is provided, including: multiple groups of energy storage batteries, a site control unit (SCU) and a central supervision unit (CSU), wherein the multiple groups of energy storage batteries form one or more battery clusters, each battery cluster is connected to the network through an RS485 interface SCU is connected; CSU is used to manage the power supply and is connected to SCU through the northbound interface to send the power supply data to SCU; SCU is used to manage multiple groups of energy storage batteries and is connected to CSU through the southbound interface to obtain the power supply data of CSU and is connected to the network management system through the Ethernet interface to send the battery data and power supply data of multiple groups of energy storage batteries to the network management system and receive instructions from the network management system.

According to another embodiment of the present disclosure, a management method for a power supply and energy storage battery network is provided. The method is applied to the system of the above embodiment to provide a communication mechanism between a CSU and an SCU. The management method includes: when the CSU is started, checking whether the CSU has an SCU configuration mark; when the CSU has the SCU configuration mark, the CSU starts its own northbound transmission process and uses a network socket to pass power data to the SCU; when the CSU does not have the SCU configuration mark, the CSU starts the SCU process, and both the SCU and the CSU run on the power supply hardware. After the SCU is started, it is managed uniformly by the CSU.

According to another embodiment of the present disclosure, a management method for a power source and energy storage battery network is provided. The method is applied to the system of the above embodiment. The management method includes: when each energy storage battery is powered on, it defaults to a preset initial address and sends an address competition message on the first CAN link of the battery cluster where it is located in a broadcast manner; according to whether a response to the address competition message is received from other energy storage batteries, a pending master energy storage battery is determined; and data frames received by the pending master energy storage battery from other battery clusters are checked, and according to whether the data frames contain second CAN link information, whether the pending master energy storage battery is the final master energy storage battery.

According to another embodiment of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

According to another embodiment of the present disclosure, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a power source and energy storage battery networking scenario according to an embodiment of the present disclosure;

FIG2 is a schematic diagram of the structure of an SCU according to an embodiment of the present disclosure;

FIG3 is a schematic diagram of a communication power supply and communication energy storage networking scenario according to an embodiment of the present disclosure;

FIG4 is a schematic diagram of a multi-cluster battery parallel connection and communication power supply networking according to an embodiment of the present disclosure;

FIG5 is a schematic diagram of a single battery cluster and a communication power supply network according to an embodiment of the present disclosure;

FIG6 is a flow chart of communication between a CSU and an SCU according to an embodiment of the present disclosure;

FIG. 7 is a flowchart of internal address competition of an energy storage battery according to an embodiment of the present disclosure.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

In order to overcome the shortcomings of the current communication energy storage networking solution, solve the technical problem that the limited access management capabilities of communication power batteries in traditional solutions cannot meet the large-scale networking needs of energy storage batteries, and alleviate the coupling of power services and battery services, resulting in a large number of power versions and difficulty in quickly supporting customers' new battery services. The following embodiments of the present disclosure provide a communication power supply, energy storage battery, and SCU to achieve decoupling and large-scale access of power services and battery services, and achieve low-cost and low-resource flexible networking of batteries of various capacities through SCU and CSU software and hardware design and Socket design. The overall solution has the significant advantages of flexibility, good scalability, easy deployment, and low cost.

In the present embodiment, a management system for a power supply and energy storage battery network is provided. FIG1 is a schematic diagram of a power supply and energy storage battery network scenario according to an embodiment of the present disclosure. As shown in FIG1 , the management system includes: multiple groups of energy storage batteries, a site control unit SCU, and a centralized monitoring unit CSU, wherein the multiple groups of energy storage batteries form one or more battery clusters, and each of the battery clusters is connected to the SCU via an RS485 interface; the CSU is used to manage the power supply, and is connected to the SCU via a northbound interface to send power supply data to the SCU; the SCU is used to perform battery management on the multiple groups of energy storage batteries, and is connected to the CSU via a southbound interface to obtain power supply data of the CSU, and is connected to a network management system via an Ethernet interface to send battery data of the multiple groups of energy storage batteries and the power supply data to the network management system and receive instructions from the network management system.

In the above embodiment, each battery cluster is connected to the SCU via an RS485 interface, and the number of battery clusters is the same as the number of RS485 interfaces.

In an exemplary embodiment, each battery cluster includes a group of main energy storage batteries and one or more groups of slave energy storage batteries. The groups of energy storage batteries in each battery cluster are connected via a first CAN link for current sharing of the groups of energy storage batteries in the battery cluster. The main energy storage batteries in each battery cluster are connected via a second CAN link for current sharing of the groups of energy storage batteries between the battery clusters.

In an exemplary embodiment, the SCU includes: a battery system management unit (BSMU), used to manage the multiple groups of energy storage batteries and obtain battery data of the multiple groups of energy storage batteries; a field supervision unit (FSU), used to aggregate the power supply data and the battery data; a site gateway (SGW), used to send the aggregated battery data and power supply data to the network management system, and receive instructions from the network management system.

In an exemplary embodiment, the BSMU adopts multi-threaded parallel management, the number of threads is the same as the number of RS485 interfaces of the battery cluster connected to the SCU, and each thread is responsible for accessing and managing a battery cluster connected to the RS485 interface.

In an exemplary embodiment, the power data is accessed from the CSU to the FSU of the SCU via a socket, and the battery data is transferred from the BSMU to the FSU via a shared memory.

In an exemplary embodiment, when there is one battery cluster, the SCU software runs on the hardware of the CSU and obtains the power data of the CSU through an inter-process Socket. When there are multiple battery clusters, the SCU runs on independent hardware and obtains the power data of the CSU through a network Socket.

The disclosed embodiment also provides a management system for communication power supply and communication energy storage parallel networking. This embodiment is applied to the scenario where the communication power supply is connected to multiple groups of energy storage batteries, and can support the networking scenario of power supply and 32 groups of lithium batteries and the scenario of parallel networking of more than multiple groups of batteries. It can be applied to scenarios such as communication base stations, core computer rooms, convergence computer rooms and substations.

As shown in FIG2 , the management system of this embodiment includes multiple groups of communication energy storage batteries (including battery packs and battery management units BMS), supporting communication power control units CSU, a site control unit SCU, network management system EDM and other sub-components. The sub-components are networked through communication methods such as CAN, RS485, Ethernet, etc., to realize the information flow between the layers, and to realize the parallel networking and management of the communication power supply and the communication energy storage battery. Among them, the communication energy storage battery adds CAN2 as an option, and the battery configured with CAN2 becomes the host through address competition, and the cluster flow is completed by the host interaction; the power supply CSU strips the energy storage battery management business and is only responsible for the power supply related business, among which the battery flow sharing function is transferred to the communication energy storage battery, and the battery data management business is completed by the SCU; the SCU includes hardware and software. In addition to the processor, the hardware is equipped with N RS485 ports for docking with multiple clusters of batteries and an Ethernet port for southbound collection for interaction with the SCU. The SCU software is divided into three modules: SBMU, FSU, and GW, which respectively perform battery management, power battery information aggregation, and SCU data uploading to the network management function.

Specifically, BSMU is responsible for completing the communication energy storage battery management business, using multi-threaded operation. FSU is responsible for completing the connection between power supply business and battery business, and uses network socket or inter-process socket to connect with CSU. SGW is responsible for connecting with the network management, sending power supply data and battery data, and issuing network management commands.

CSU adds or reuses northbound Ethernet ports to enable CSU data to be sent to SCU via network sockets. CSU implements inter-process sockets and network sockets to achieve compatibility of CSU and SCU data transmission in different scenarios. In a single-cluster battery scenario, SCU software runs on CSU hardware and obtains CSU data through inter-process sockets. In a multi-cluster battery scenario, SCU runs on independent hardware and obtains CSU data through network sockets.

This embodiment involves technical solutions such as power management and battery management decoupling technology, multi-group communication energy storage networking technology, and current sharing between energy storage battery clusters. The technical solutions involved are described below.

In the technical solution provided in this embodiment, the power management service of the communication power supply is decoupled from the battery management service, wherein the networking of multiple battery groups and battery data management are completed by the SCU, the fusion of power and battery data and uploading to the network management are completed jointly by the CSU and SCU, and the battery current sharing service is completed by the energy storage battery.

In this embodiment, the SCU hardware includes M RS485 ports for energy storage battery access. Each RS485 port can be used as a cluster of communication energy storage batteries for access. In addition, it can also include several extended serial ports for expanding access capabilities. In addition, the SCU can also include a southbound Ethernet port for interacting with the CSU to obtain power data and a northbound Ethernet port for interacting with the network management EDM.

As shown in FIG3 , in this embodiment, the SCU is functionally composed of three components: the BSMU is responsible for energy storage battery service management, the FSU is responsible for battery and power access and other extended access, and the SGW is responsible for sending data to the network application layer and receiving network application layer instructions. The design of each part is as follows:

(1) BSMU uses multi-threaded parallel management. The number of threads is consistent with the number of RS485 interfaces connected to the energy storage batteries. Each thread is responsible for managing the access and management of a battery cluster connected to the RS485 interface.

(2) The power data is connected to the FSU module of the SCU through the socket from the CSU, and the battery data is transmitted to the FSU through the shared memory from the BSMU. In this way, the power data and battery data are aggregated at the FSU layer;

(3) The SGW uses the same link to transmit the power and battery data summarized by the FSU to the EDM network management system, which is fully compatible with the original EDM structure.

In the present disclosure, the CSU undertakes the power management business and transfers the battery data management and battery current sharing business to the SCU and energy storage battery. The power management business CSU and the battery management business BSMU are physically isolated, thereby realizing the decoupling of the power and battery management business. The power supply adds or reuses the northbound Ethernet port to connect to the SCU entity. The power supply's own data (such as rectifiers, lead-acid batteries, etc.) is transmitted from the CSU to the SCU using a socket, and then aggregated and transmitted to the EDM.

In this embodiment, the interaction between the CSU and the SCU may be performed in the following manner:

As shown in Figure 4, for the multi-cluster battery access scenario, configure the SCU hardware entity, communicate with the energy storage battery data through the RS485 serial port on the SCU, and the CSU exchanges data with the SCU through the network Socket;

As shown in Figure 5, for a single-cluster battery access scenario, the SCU hardware entity is not configured, and the SCU software is deployed on the CSU hardware. The SCU software communicates with the energy storage battery data through the southbound serial port of the CSU, and the CSU and SCU exchange data through the inter-process Socket.

In this embodiment, the CSU may include an SCU configuration tag, and determine through the tag that the CSU uses a network Socket or an inter-process Socket, so as to achieve compatibility between the CSU and the SCU in a single-cluster scenario and a multi-cluster scenario.

As shown in Figure 6, the steps for CSU to use network sockets and process sockets to achieve compatibility between single-cluster battery and multi-cluster battery scenarios are as follows:

Step S601: CSU software starts;

Step S602: Check whether the CSU has an SCU configuration mark;

Step S603, if the CSU contains the SCU configuration mark, it means that the system configures the SCU hardware, the CSU starts its own northbound transmission process, and uses the network socket to transmit the power data to the SCU;

Step S604: If the CSU does not contain the SCU configuration mark, it means that the system is not configured with SCU hardware, then the CSU starts the SCU process, and both the SCU and the CSU run on the power hardware. After the SCU is started, it is included in the unified management of the CSU;

Step S605: registering the SCU process to the CSU system management process;

Step S606: The CSU starts its own northbound transmission process and communicates with relevant components in the SCU software using an inter-process Socket;

Step S607: Based on step S604, the CSU checks whether the SCU runs normally through a heartbeat message;

Step S608, if the SCU heartbeat cannot be detected, the CSU will try to restart the SCU process;

Step S609: If the SCU cannot be restored to normal after multiple attempts, the CSU generates an SCU function abnormality alarm and takes over the network management parameters in the SCU. The CSU northbound transmission process directly transmits basic power data to the network management.

In this embodiment, the communication energy storage batteries are configured with two RS485 interfaces and one CAN interface (CAN1); based on this configuration, each cluster selects another battery to configure the second CAN interface (CAN2). The single cluster battery completes the address allocation through address competition to determine the master and slave. The RS485 of the slave is used for parallel connection of battery clusters, the RS485 of the host is used for parallel connection, and one RS485 is connected to the serial port of the SCU for battery cluster data interaction. In a single cluster, the master and slave machines use CAN1 to balance the current within the cluster; the current balancing between clusters is completed by the hosts of each cluster, and the current balancing method is the same as the current balancing method within the cluster. Battery current balancing technology is a common method in the industry and will not be described in detail here.

The disclosed embodiment also provides a battery address competition technology to ensure that the battery configured with CAN2 competes for the battery cluster master. As shown in FIG7 , the specific steps are as follows:

Step S701: the battery is powered on, the default address is 1, and an address competition command is actively sent, for example, three times, on the battery cluster CAN1 link in a broadcasting manner;

Step S702: Determine whether a response to the address contention is received, if no response is received, execute step S703, if a response is received, execute step S704;

Step S703: If there is no response, maintain the current address;

Step S704: If there is a response, the battery address is increased by 1 based on the current address, and the address competition command is resent 3 times;

Step S705: Based on step S702, further determine whether the battery address is 1;

Step S706, if the battery address is 1, the battery is used as a pending host to process host competition information;

Step S707: Process the address contention information and check whether the received data frame contains CAN2 information. If the received data frame does not contain CAN2 information, the battery address remains unchanged. If the received data frame contains CAN2 information, it means that the battery with CAN2 is competing for the host, so the battery address is increased by 1 and the address contention command is resent 3 times.

Through the above steps, the batteries with CAN2 in the battery cluster compete to become the host, and each cluster host completes the inter-cluster current sharing through CAN2 and completes the intra-cluster current sharing through CAN1. In this way, the current sharing business of the communication energy storage battery is transferred from the CSU to the energy storage battery device.

In the above embodiments of the present disclosure, in the scenario of multiple energy storage battery groups being connected in parallel, an SCU device is added to change the traditional power supply configuration, which can meet the needs of power reuse and expand the battery capacity to adapt to more user demand scenarios. In addition, the SCU multi-threaded management of multiple battery clusters can greatly improve the efficiency of battery management, with higher real-time data and more refined management, which can effectively improve the user experience. At the same time, the energy storage batteries constitute an independent energy storage plane, with higher current sharing efficiency, and in extreme scenarios, the control plane Even in the case of damage, the battery operation is still unaffected and customers can clearly feel it.

In order to facilitate further understanding of the technical solutions provided by the above embodiments of the present disclosure, a detailed description will be given below in conjunction with specific scenario embodiments.

Example 1

In this embodiment, communication energy storage lithium batteries ranging from a minimum of 10 groups to a maximum of 120 groups are provided, which are matched with rectifiers or photovoltaic plug-ins of different capacities to form communication power supply systems with various configurations, which are applied to various scenarios such as core computer rooms and aggregation computer rooms to meet the power and backup power requirements of base stations at multiple sites.

In order to facilitate remote management and maintenance of the communication power supply system, the power supply system is required to be connected to the network management. However, due to limited IP resources, the power supply system (including power supply and battery) of each site only uses one IP resource.

This implementation example uses SCU equipment (for example, configuration: 6 southbound RS485 ports, 1 southbound network port, 1 northbound network port) to solve the problem of 120 battery parallel networking and decoupling the power supply business from the battery management business. In order to solve the above problems, according to the design ideas of this disclosure, design state and operation state implementation steps are provided.

Design implementation steps:

S1: Analyze the configuration of the power supply and battery of the site to be networked, and determine the network design plan. Based on the current design of the battery cabinet, the maximum number of battery groups that a single battery cabinet can accommodate is 10 groups, so the batteries in this implementation case are divided into 12 battery cabinets. In order to facilitate the connection of on-site battery signal lines and subsequent maintenance work, it is necessary to ensure that the batteries in the same cabinet are connected to one RS485 bus as much as possible, and at the same time, try to use the parallel processing capabilities of the SCU to improve the battery data processing efficiency. Therefore, the 20 groups of batteries from the two battery cabinets are connected to one RS485 bus. That is: 120 groups of batteries are finally connected to the 6 RS485 ports of the SCU, the power supply CSU is connected to the SCU through the southbound Ethernet port, and the SCU is connected to the network management through the northbound Ethernet port.

S2: CSU design and deployment:

CSU includes two parts of business: power business management and interaction with SCU. It transfers the current sharing and data management business of the communication energy storage battery in the traditional power supply to the SCU and the energy storage battery device respectively; the CSU southbound RS485 port does not connect to the energy storage battery, which physically decouples the power supply and battery business management. The CSU software completes the collection of power supply information (such as DC power distribution, AC power distribution, rectifier, etc.) and lead-acid battery information directly under the power supply; CSU transmits the collected data to the SCU through the network Socket, and the transmission protocol reuses the original northbound protocol 1104 protocol of the power supply.

S3: SCU design and deployment:

SCU includes 6 southbound RS485 interfaces, one southbound Ethernet port, and one northbound Ethernet port. The SCU software consists of three parts: BSMU, FSU, and SGW. BSMU includes 6 sub-threads, which obtain the connected energy storage battery data from the 6 RS485 ports respectively; BSMU and the communication energy storage battery interact using the modbus protocol; each sub-thread of BSMU uses polling to obtain the battery information of address 1-address 32, and obtains the 20 groups of connected battery information in turn, and stores them in the shared memory. FSU interacts with CSU through network Socket, obtains power supply related information by parsing the 1104 protocol, and reads the battery energy storage information obtained by SBMU from the shared memory. FSU collects the obtained power supply and energy storage battery data to obtain complete power supply system data. SGW includes northbound network management connection parameters and network management response function services, and transmits the power supply and battery data collected by FSU to the network management system through the northbound Ethernet port. This example uses the SNMP V3 protocol.

S4: Energy storage battery design and deployment:

In this example, there are 120 groups of energy storage batteries, and 20 groups of batteries are connected to one RS485 bus as a cluster. Each group of batteries is equipped with two RS485s and one CAN (CAN1). One group of every 20 batteries is equipped with the second CAN (CAN2). The 20 batteries in the cluster are connected in parallel through CAN1 and RS485, and connected to the southbound RS485 port of the SCU through R485; The hosts of 6 battery clusters are connected in parallel. The address competition method is used to realize that the battery configured with CAN2 becomes the host of each cluster (see Example 3 for details). CAN1 and CAN2 are used to realize intra-cluster current sharing and inter-cluster current sharing respectively, and the data transmission between the energy storage battery and the SCU adopts the modbus protocol.

Operational implementation steps:

S5: Complete system software and hardware deployment according to the design state design.

S6: Energy storage system startup and current sharing: The energy storage system starts, determines the address and host of the battery in each cluster through address competition, starts the current sharing service, and starts the data response process to respond to the instructions of the SCU;

S7: CSU startup: CSU starts to perform power-related services. CSU checks the SCU configuration flag to check whether the system is configured with SCU. In this example, the system is configured with SCU hardware entity, and CSU determines that there is SCU configuration, then starts the CSU northbound process, enters the network socket response process, waits for SCU instructions and responds;

S8: SCU startup: SCU starts, and BSMU, FSU, and SGW start accordingly, completing the shared memory mapping of SBMU, FSU, and SGW. BSMU starts 6 sub-threads, and the 6 sub-threads send modus instructions in parallel according to addresses 1-32 and parse the energy storage battery data according to the response results and store them in the shared memory. FSU uses network Socket to establish a link with CSU, and sends 1104 instructions and parses the power-related data according to the response results and stores them in the shared memory. SGW receives the network management SNMP V3 instructions and obtains the power and battery data from the shared memory according to the instruction content and encapsulates it into the corresponding protocol format to respond to the network management instructions.

Example 2

In the above embodiment 1, a scenario of 120 groups of a certain operator is mainly used as an example to describe the implementation method of the technology of parallel networking of multiple groups of batteries and decoupling of power and battery services. In embodiment 1, the power supply and the battery are completely isolated from both the software and hardware, so as to achieve complete decoupling of the power service and the battery service.

This example further supplements the design of CSU on the basis of Example 1, and describes in detail the compatibility design implementation of CSU to achieve the power supply and battery decoupling solution in single-cluster battery and multi-cluster battery scenarios. The main steps of this implementation example are as follows:

Design implementation steps:

S1: CSU hardware design: The hardware body of CSU is the original power management unit hardware. This disclosure requires that CSU must have an Ethernet port. If the original power supply hardware contains a northbound Ethernet port, this port is reused for communication with SCU; if the power supply does not contain a northbound Ethernet port, the power supply adds a northbound Ethernet port.

S2: CSU software design: CSU includes power management business components for power-related business management, northbound transmission components for transmitting power data to SCU, and process management services for managing CSU running processes to ensure the normal operation of each process running on CSU. The northbound transmission components uniformly use Socket to connect and interact with SCU. In this example, 1104 protocol is used for data transmission, so as to achieve compatibility of solutions in multi-cluster battery networking and single-cluster battery networking. Among them, in single-cluster battery networking, SCU software is deployed on CSU hardware, and the interaction mode between CSU and SCU is inter-process Socket; in multi-cluster battery networking, SCU software is deployed on SCU hardware, and the interaction mode between CSU and SCU is network Socket. The two scenarios are distinguished by the SCU configuration tag on the CSU and judged at runtime.

Operational status implementation steps:

S3: CSU starts. CSU starts to carry out power supply related services.

S4: CSU checks the SCU configuration mark to determine whether the system is configured with SCU; if it is detected that the system is not configured with SCU, it jumps to S5; if the SCU entity is configured, it jumps to S12.

S5: If the CSU does not contain the SCU configuration mark, it means that the system is not configured with SCU hardware, then the CSU starts the SCU process. Both the SCU and the CSU run on the power hardware. After the SCU is started, it is included in the unified management of the CSU.

S6: Based on S5, CSU starts its own northbound transmission process and uses the inter-process Socket to communicate with the corresponding SCU software. The SCU communicates with the switch components, waits for receiving the 1104 instruction sent by the SCU, and obtains power data and responds according to the instruction content.

S7: The CSU process management module checks whether the SCU runs normally through heartbeat messages; if the SCU heartbeat cannot be detected, the CSU will try to restart the SCU process; if the SCU cannot be restarted, jump to S8.

S8: If the SCU cannot be restored to normal after multiple attempts, the CSU generates an SCU function abnormality alarm and takes over the network management parameters in the SCU. The CSU northbound transmission process directly transmits basic power data to the network management.

S9: The SCU subcomponent SBMU starts a subthread to manage the energy storage battery through the RS485 port of the CSU hardware. It sends modbus instructions to poll addresses 1-32 in sequence, obtains the energy storage battery data and stores it in the shared memory.

S10: The SCU subcomponent FSU communicates with the CSU process through the inter-process Socket, sends a 1104 instruction to the CSU to obtain power data, parses it, and stores it in the shared memory, thereby realizing the collection of power and battery data.

S11: The SCU subcomponent parses the network management parameters, establishes a connection with the network management, and receives network management instructions to obtain power and battery data to respond to network management requirements.

S12: According to the result of S4, if the detection system is configured with an SCU entity, the CSU does not start the SCU process; the CSU starts the northbound transmission process and communicates with the SCU entity using a network socket. The CSU waits to receive the 1104 instruction issued by the SCU and responds.

Through the above steps, CSU realizes unified interaction between CSU and SCU through Socket design to meet the compatibility of single-cluster and multi-cluster scenario solutions, and realizes the transfer of battery services from CSU to SCU.

Example 3

The above embodiment 1 mainly describes the overall solution of using CSU, SCU and energy storage battery to realize the decoupling of power supply and battery service and the access of multiple groups of energy storage batteries. Embodiment 2 mainly supplements the implementation method of CSU using Socket design to solve the compatibility technology of single cluster battery and multiple groups of battery access solution.

This example supplements the overall current sharing implementation method of the energy storage battery on the basis of the previous two examples. Example Background Referring to Example 1, still taking 120 groups of batteries as an example, the implementation method is as follows:

Design implementation steps:

S1: Each battery group is equipped with two RS485 and one CAN (CAN1). CAN1 and RS485 are used for parallel connection of batteries in the cluster.

S2: In each cluster, a group of batteries is selected to configure the second CAN (CAN2) as the master for inter-cluster battery paralleling.

Operational implementation steps:

S3: The battery pack is powered on, the default address is 1, and the address competition command is actively sent three times on the battery cluster CAN1 link in broadcast mode.

S4: Determine the result of S3. If there is no response, maintain the current address. If the battery address is 1, the battery acts as a pending host and processes host competition information. If there is a response, the battery address is increased by 1 based on the current address, and the address competition command is resent 3 times.

S5: The pending host processes the host contention message and checks whether the received data frame contains CAN2 information; if the received contention message data frame does not contain CAN2 information, the battery address remains unchanged; if the received data frame contains CAN2 information, the battery address is increased by 1 and the address contention command is resent 3 times.

S6: When there is no more address competition command from S3-S5 battery to each battery, the energy storage battery completes the address allocation and the battery with CAN2 becomes the host of each cluster.

S7: Each battery cluster broadcasts a current sharing instruction through the CAN1 link to share the current of the batteries in the cluster.

S8: The host of each battery cluster broadcasts a current sharing instruction through the CAN2 link to achieve current sharing for each battery host.

Through this implementation example, all energy storage batteries complete the current sharing service, thereby transferring the battery current sharing service from the traditional power supply to the energy storage battery, which is conducive to decoupling the power supply and battery services and improving the safety and reliability of the energy storage battery. Since the energy storage battery and the power supply are decoupled, the technical solution provided by this implementation is also applicable even if it is connected to a third-party power supply or other equipment.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the technical solution according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present disclosure, or the part that contributes to the prior art, can be embodied in the form of software plus a necessary general hardware platform, and the software can be stored in a storage medium (such as ROM/RAM, a disk, or an optical disk), including a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to perform the functions of the various components of the above embodiments of the present disclosure.

An embodiment of the present disclosure further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

In an exemplary embodiment, the above-mentioned computer-readable storage medium may include, but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

An embodiment of the present disclosure further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

In an exemplary embodiment, the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present disclosure can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. In this way, the present disclosure is not limited to any specific combination of hardware and software.

The above description is only an exemplary embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims (15)

A management system for power supply and energy storage battery networking, comprising: multiple groups of energy storage batteries, a site control unit SCU and a centralized monitoring unit CSU, wherein: The multiple groups of energy storage batteries form one or more battery clusters, and each of the battery clusters is connected to the SCU via an RS485 interface; The CSU is used to manage power supply and is connected to the SCU via a northbound interface to send power supply data to the SCU; The SCU is used to perform battery management on the multiple groups of energy storage batteries, connect to the CSU through a southbound interface to obtain power data of the CSU, and connect to the network management system through an Ethernet interface to send the battery data and the power data of the multiple groups of energy storage batteries to the network management system and receive instructions from the network management system. The system according to claim 1, wherein each battery cluster includes a group of main energy storage batteries and one or more groups of slave energy storage batteries, the groups of energy storage batteries in each battery cluster are connected through a first controller area network (CAN) link, which is used for current sharing of the groups of energy storage batteries in the battery cluster, and the main energy storage batteries in each battery cluster are connected through a second CAN link, which is used for current sharing of the groups of energy storage batteries between the battery clusters. The system according to claim 1, wherein the SCU comprises: A battery system management unit BSMU, used to manage the multiple groups of energy storage batteries and obtain battery data of the multiple groups of energy storage batteries; A dynamic environment monitoring unit FSU, used for summarizing the power supply data and the battery data; The site gateway SGW is used to send the aggregated battery data and power supply data to the network management system, and receive instructions from the network management system. The system according to claim 3, wherein the BSMU adopts multi-threaded parallel management, the number of threads is the same as the number of RS485 interfaces of the battery cluster connected to the SCU, and each thread is responsible for the access and management of a battery cluster connected to the RS485 interface. The system according to claim 3, wherein the power data is accessed by the CSU to the FSU of the SCU through a socket, and the battery data is transferred from the BSMU to the FSU through a shared memory. According to the system of claim 1, wherein, when there is one battery cluster, the SCU software runs on the hardware of the CSU and obtains the power data of the CSU through an inter-process socket Socket, and when there are multiple battery clusters, the SCU runs on independent hardware and obtains the power data of the CSU through a network Socket. The system according to claim 1, wherein each of the battery clusters is connected to the SCU via an RS485 interface, and the number of the battery clusters is the same as the number of the RS485 interfaces. A method for managing a power supply and energy storage battery network, applied to the system according to any one of claims 1 to 7, comprising: When the CSU is started, checking whether the CSU has an SCU configuration flag; In the case where the CSU has the SCU configuration tag, the CSU starts its own northbound transmission process and transmits the power data to the SCU using a network socket; In the case that the CSU does not have an SCU configuration mark, the CSU starts the SCU process, the SCU and the CSU both run on power hardware, and the SCU is uniformly managed by the CSU after it is started. The method according to claim 8, wherein, in the case where the CSU does not have an SCU configuration flag, the CSU starting the SCU process comprises: The CSU starts its own northbound transmission process and uses an inter-process Socket to communicate with relevant components in the SCU software. The method according to claim 8, further comprising: The CSU checks whether the SCU runs normally through a heartbeat message. If the SCU heartbeat message cannot be detected, the CSU restarts the SCU process; In the case of failure to restart the SCU process, the CSU generates an SCU function abnormality alarm, and the CSU northbound transmission process directly sends power data to the network management system. A method for managing a power supply and energy storage battery network, applied to the system according to any one of claims 1 to 7, comprising: When each of the energy storage batteries is powered on, it uses a preset initial address by default, and sends an address competition message on the first CAN link of the battery cluster in which it is located by broadcasting; Determine the pending main energy storage battery according to whether a response to the address competition message is received from other energy storage batteries; Check the data frame received by the pending main energy storage battery from other battery clusters, and determine whether the pending main energy storage battery is the final main energy storage battery according to whether the data frame contains the second CAN link information. The method according to claim 11, wherein determining the pending main energy storage battery according to whether a response to the address competition message is received from other energy storage batteries comprises: When receiving a response from other energy storage batteries to the address contention message, adding a preset value to the current address of the energy storage battery and rebroadcasting the contention message; In the case where no response to the address competition message is received from other energy storage batteries, the current first address of the energy storage battery is maintained, and the energy storage battery is determined as a pending master energy storage battery. The method according to claim 11, wherein determining whether the pending main energy storage battery is the final main energy storage battery according to whether the data frame contains the second CAN link information comprises: In the case where the data frame includes the second CAN link information, adding a preset value to the current address of the pending main energy storage battery, and rebroadcasting the contention message; When the data frame does not contain the second CAN link information and the current address of the to-be-determined main energy storage battery is the initial address, the main energy storage battery is determined to be the final main energy storage battery. A computer-readable storage medium having a computer program stored therein, wherein: When the computer program is executed by a processor, the steps of the method described in any one of claims 8 to 10 are implemented, or the steps of the method described in any one of claims 11 to 13 are implemented. An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in any one of claims 8 to 10 are implemented, or the steps of the method described in any one of claims 11 to 13 are implemented.