Energy storage battery management system

Abstract

The utility model provides an energy storage battery management system, and relates to the technical field of energy storage management, the system comprises a battery array unit, an Ethernet switch and a plurality of battery clusters connected in parallel, each battery cluster comprises a battery cluster management system and a plurality of battery management units, and the battery array unit adopts a programmable logic controller; each battery cluster management system is in communication connection with the programmable logic controller through a CAN bus and is in communication connection with the Ethernet switch through the Ethernet; and the Ethernet switch is in communication connection with the programmable logic controller through the Ethernet. According to the energy storage battery management system, the battery array unit in the energy storage battery management system adopts the programmable logic controller as a program carrier, and the communication connection is established between the programmable logic controller and the battery cluster management system through the CAN bus and the Ethernet, so that the real-time performance, the reliability and the safety of the energy storage battery management system are improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage management, and particularly to an energy storage battery management system. Background Art

[0002] An energy storage battery management system is an integrated system used to manage and control the charging, discharging, and operating states of energy storage batteries to achieve the storage and release of electrical energy. The energy storage battery management system usually adopts a three-level architecture, specifically including a Battery Management Unit (BMU), a Battery Cluster Management System (BCMS), and a Battery Array Unit (BAU).

[0003] In related technologies, the BAU at the general control level usually uses an industrial computer as the carrier of the program. However, for control tasks that require timely response, when using an industrial computer as the carrier of the general control unit BAU, due to the characteristics of the industrial computer itself, it may lead to poor real-time communication between the BAU and the BCMS, and may face problems such as frequent software crashes and poor operating reliability. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide an energy storage battery management system to solve the problem that when using an industrial computer as the carrier of the general control unit BAU, the real-time communication between the BAU and the BCMS is poor, reducing the reliability and safety of the energy storage battery management system.

[0005] To achieve the above purpose, in the first aspect of this application, an energy storage battery management system is provided. The system includes a battery array unit, an Ethernet switch, and a plurality of battery clusters connected in parallel. Each battery cluster includes a battery cluster management system and a plurality of battery management units. The battery array unit uses a programmable logic controller; each battery cluster management system is communicatively connected to the programmable logic controller through a CAN bus and is communicatively connected to the Ethernet switch through an Ethernet; the Ethernet switch is communicatively connected to the programmable logic controller through an Ethernet.

[0006] In the embodiments of this application, in each battery cluster, the battery cluster management system and each battery management unit are sequentially connected through a daisy chain communication method to form a ring network.

[0007] In the embodiments of this application, in each battery cluster, the battery cluster management system is communicatively connected to the battery management unit through a twisted pair.

[0008] In the embodiment of the present application, the battery management unit is connected to a plurality of single cells, and the data capacity of each single cell includes 4992 single cell voltages, 5184 temperatures, 4992 equalization states, and 2000 battery state information.

[0009] In the embodiment of the present application, the number of battery clusters is less than or equal to 32.

[0010] In the embodiment of the present application, the programmable logic controller is also connected to a power conversion system.

[0011] In the embodiment of the present application, the programmable logic controller is also connected to an energy management system.

[0012] In the embodiment of the present application, the programmable logic controller is also connected to an energy storage power station monitoring system.

[0013] In the embodiment of the present application, the programmable logic controller is also connected to a power environment monitoring system and / or a fire protection system and / or a thermal management system of the energy storage battery bin.

[0014] In the embodiment of the present application, the Ethernet switch is connected to a display screen.

[0015] The technical solution of the present utility model has the following advantages or beneficial effects:

[0016] In the energy storage battery management system provided by the present utility model, the battery array unit BAU uses a programmable logic controller (PLC) as a program carrier, which can provide high-precision real-time control to ensure timely response to time-critical control tasks. At the same time, a communication connection is established between the CAN bus with high real-time characteristics and the battery cluster management system BCMS, so that the hybrid integrated energy storage battery management system has strong real-time performance; using the Ethernet switch as an intermediate device, while the battery cluster management system BCMS communicates with the programmable logic controller PLC through the CAN bus, the communication between the battery cluster management system BCMS and the battery array unit BAU is realized through the Ethernet, and a local area network of the energy storage battery management system is constructed to perform redundant backup on the CAN bus communication, improving the reliability and security of the energy storage battery management system.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. They are used together with the following specific implementation manners to explain the embodiments of the present application, but do not limit the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0019] Figure 1 Schematically shows the structural diagram of the energy storage battery management system according to the embodiment of the present application. Specific implementation manner

[0020] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the specific implementation manners described herein are only used to explain and illustrate the present utility model, and do not limit the present utility model.

[0021] In view of the problem that when an industrial computer is used as the carrier of the total control unit BAU in the related art, the real-time communication between BAU and BCMS is poor, reducing the reliability and safety of the energy storage battery management system, the present application provides an energy storage battery management system. The energy storage battery management system provided by the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and implementation manners.

[0022] Figure 1 Schematically shows the structural diagram of the energy storage battery management system according to the embodiment of the present application. As Figure 1 shown, in an embodiment of the present application, an energy storage battery management system is provided. The system includes a battery array unit, an Ethernet switch, and a plurality of battery clusters connected in parallel. Each battery cluster includes a battery cluster management system and a plurality of battery management units. The battery array unit uses a programmable logic controller; each battery cluster management system communicates with the programmable logic controller through a CAN bus and communicates with the Ethernet switch through Ethernet; the Ethernet switch communicates with the programmable logic controller through Ethernet.

[0023] Among them, the battery cluster management system BCMS has both an Ethernet communication interface and a CAN communication interface at the same time. The battery cluster management system BCMS realizes communication with the programmable logic controller PLC through the Ethernet communication interface and the CAN communication interface. The CAN bus and Ethernet use different industrial protocols for data transmission. The programmable logic controller PLC and the battery cluster management system BCMS integrate an automatic addressing algorithm. The programmable logic controller PLC coordinates the battery cluster management system BCMS to complete automatic addressing, and assigns its CAN bus physical address and Ethernet IP address to the battery cluster management system BCMS.

[0024] Specifically, the battery cluster management system BCMS uses an embedded system to implement its functions, such as monitoring the battery status, controlling the charging and discharging process, etc. It has high reliability and real-time performance. In addition, the programmable logic controller PLC is a real-time system that can quickly respond to input signals and generate outputs to execute various control tasks. In this embodiment, the battery cluster management system BCMS with an embedded design and the programmable logic controller PLC are hybrid integrated together, making the entire energy storage battery management system have strong real-time performance and reliability.

[0025] It is worth mentioning that in this embodiment, the battery cluster management system BCMS utilizes the high-bandwidth characteristic of Ethernet to achieve the rapid transmission of detailed data information of a large number of single cells (such as current, voltage, temperature, charging and discharging status, health status) to the programmable logic controller PLC, so as to help realize the real-time monitoring, centralized management, rapid response and data optimization of the system, thereby improving the overall safety, efficiency and reliability.

[0026] In this embodiment, in each battery cluster, the battery cluster management system and each battery management unit are sequentially connected through a daisy chain communication method to form a ring network.

[0027] Specifically, by sequentially connecting the battery cluster management system BCMS and each battery management unit BMU through a daisy chain communication method to form a ring network, when there is a communication interruption between the battery management units BMU in the ring network, the battery cluster management system BCMS can still obtain the relevant data of the battery management unit BMU with the communication interruption through the reverse daisy chain, which not only improves the communication rate but also improves the system reliability.

[0028] This embodiment is based on a system network topology architecture of a daisy chain ring network and Ethernet real-time communication, and is more adaptable to the real system environment, especially for MW-level energy storage battery management systems.

[0029] In this embodiment, in each battery cluster, the battery cluster management system is communicatively connected to the battery management unit through a twisted pair.

[0030] Among them, the communication wire harness between the battery cluster management system BCMS and the battery management unit BMU is a pair of twisted pairs, and a pair of twisted pairs can transmit data and power supply simultaneously. Compared with using the traditional CAN communication connection method (such as communication lines, power lines) to establish a connection between the battery cluster management system BCMS and the battery management unit BMU, this embodiment has the advantages of simplifying wiring and connection, reducing installation and maintenance costs, improving anti-interference ability and data transmission rate by using twisted pairs to establish a connection between the battery cluster management system BCMS and the battery management unit BMU.

[0031] In this embodiment, the Ethernet switch is connected to a display screen.

[0032] In this embodiment, the high - bandwidth characteristic of Ethernet is utilized to transmit the detailed data information of individual batteries to the display screen for visual display, which helps the management personnel to analyze and make decisions based on the data, improving the efficiency and reliability of the overall system.

[0033] In this embodiment, the battery management unit is connected to multiple individual batteries, and the data capacity of each individual battery includes 4992 individual voltages, 5184 temperatures, 4992 equalization states, and 2000 battery status information.

[0034] Specifically, each individual battery in the electrochemical energy storage system needs to communicate and interact with the energy storage battery management system so that the energy storage battery management system can monitor and adjust the battery status in a timely manner. In this embodiment, taking a 5MWh electrochemical energy storage system as an example, the data capacity of its individual batteries can include 4992 individual voltages, 5184 temperatures, 4992 equalization states, and 2000 battery status information. The duration for these data to be transmitted to the programmable logic controller PLC and / or the display screen connected to the Ethernet switch via Ethernet can be less than 1 second, ensuring the effective acquisition and processing of MW - level energy storage battery data, and improving the safety, reliability, and real - time performance of the system.

[0035] In this embodiment, the number of battery clusters is less than or equal to 32.

[0036] Specifically, based on the network topology architecture of the energy storage battery management system provided in this embodiment, on the premise of meeting the real - time performance, safety, and reliability of the energy storage battery management system, the number of battery clusters can reach 32, and the number of battery clusters can be set according to the actual situation. It is worth mentioning that the network topology architecture provided in this embodiment can be freely combined for energy storage systems of different capacity levels, that is, through the adjustment of software configuration, the dynamic management of the energy storage system capacity can be realized without involving complex and expensive hardware changes or re - configuration of network bandwidth.

[0037] In this embodiment, the programmable logic controller is also connected to the power conversion system.

[0038] Specifically, according to specific application requirements (such as cost, data transmission rate, transmission distance, anti - interference ability), a more suitable connection method and the corresponding network interface among CAN bus, RS485 bus, Ethernet, and hard - wire can be selected to establish a communication connection between the programmable logic controller PLC and the power conversion system (PCS), so as to transmit the data obtained from the battery cluster management system BCMS to the power conversion system PCS, realizing the efficient operation and optimal utilization of the battery pack, and at the same time ensuring the stability, safety, and reliability of the entire energy storage battery management system under different working conditions.

[0039] In this embodiment, the programmable logic controller is also connected to an energy management system.

[0040] Specifically, the programmable logic controller PLC can establish a communication connection with the Energy Management System (EMS) through its own network interface based on a power communication protocol (such as Modbus), so as to transmit the data obtained from the Battery Cluster Management System (BCMS) to the energy management system EMS, enabling the energy management system EMS to understand the state of the battery pack in real time and adjust the operation strategy of the battery pack according to the grid and user requirements, realizing efficient energy management and optimization.

[0041] In this embodiment, the programmable logic controller is also connected to a monitoring system for the energy storage power station.

[0042] Specifically, the programmable logic controller PLC can also establish a communication connection with the monitoring system for the energy storage power station through its own network interface based on the power communication protocol, so as to transmit the data obtained from the Battery Cluster Management System (BCMS) to the monitoring system for the energy storage power station, thereby realizing data sharing, operation monitoring, remote operation, etc., and improving the operation efficiency, safety and reliability of the entire energy storage power station.

[0043] In this embodiment, the programmable logic controller is also connected to a power environment monitoring system and / or a fire protection system and / or a thermal management system for the energy storage battery warehouse.

[0044] Among them, the energy storage battery warehouse refers to a facility or area for centrally storing and managing batteries; the power environment monitoring system is used to monitor parameters such as the operating state, voltage, current, and temperature of the batteries, detect abnormal situations (such as overheating, overcharging, over-discharging) in a timely manner, and take necessary measures to avoid battery damage or accidents; the fire protection system is used to provide early fire warning functions, detect abnormal changes inside the energy storage battery warehouse through monitoring devices such as smoke detectors and temperature sensors, issue alarms in a timely manner and take fire extinguishing measures to prevent the spread of fire and damage to battery equipment; the thermal management system is used to monitor and adjust the working temperature of the batteries to prevent the adverse effects of too high or too low temperature on the battery life and performance.

[0045] In this embodiment, a communication connection is established between the programmable logic controller PLC and the power environment monitoring system and / or the fire protection system and / or the thermal management system for the energy storage battery warehouse, so as to transmit the data obtained from the Battery Cluster Management System (BCMS) to at least part of the systems of the energy storage battery warehouse, so as to avoid losses caused by battery failures, fires or temperature abnormalities, etc., thereby ensuring that it can stably provide the required power support and energy storage functions.

[0046] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in this application, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If the specific posture changes, then the directional indications will also change accordingly.

[0047] In the description of this application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In addition, if there are descriptions involving "first", "second", etc. in this application, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0049] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary, and for those skilled in the art, this application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. An energy storage battery management system, characterized in that: The system includes a battery array unit, an Ethernet switch and multiple battery clusters connected in parallel, each battery cluster includes a battery cluster management system and multiple battery management units, and the battery array unit adopts a programmable logic controller; each battery cluster management system is connected to the programmable logic controller through a CAN bus and is connected to the Ethernet switch through Ethernet; the Ethernet switch is connected to the programmable logic controller through Ethernet.

2. The energy storage battery management system according to claim 1, characterized in that: In each battery cluster, the battery cluster management system and each battery management unit are connected in sequence through a daisy chain communication method to form a ring network.

3. The energy storage battery management system according to claim 2, characterized in that: In each battery cluster, the battery cluster management system is connected to the battery management unit through a twisted pair cable.

4. The energy storage battery management system according to claim 2, characterized in that: The battery management unit is connected to multiple single cells, and the data capacity of each single cell includes 4992 single cell voltages, 5184 temperatures, 4992 balancing states and 2000 battery status information.

5. The energy storage battery management system according to claim 1, characterized in that: The number of battery clusters is less than or equal to 32.

6. The energy storage battery management system according to claim 1, characterized in that: The programmable logic controller is also connected to the power conversion system.

7. The energy storage battery management system according to claim 1, characterized in that: The programmable logic controller is also connected to an energy management system.

8. The energy storage battery management system according to claim 1, characterized in that: The programmable logic controller is also connected to the energy storage power station monitoring system.

9. The energy storage battery management system according to claim 1, characterized in that: The programmable logic controller is also connected to a power environment monitoring system and / or a fire protection system and / or a thermal management system of the energy storage battery compartment.

10. The energy storage battery management system according to claim 1, characterized in that: The Ethernet switch is connected to the display screen.

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