Energy storage system and energy storage device

Abstract

The embodiment of the application provides a kind of energy storage system and energy storage equipment, belong to energy storage technical field, comprising: master control module, master control module is configured to send instruction signal;Power conversion module;Battery management module;Extension module;Wherein, power conversion module, battery management module and extension module are all connected with master control module by EtherCAT bus, to constitute EtherCAT network, power conversion module, battery management module and extension module are all used to obtain instruction signal by EtherCAT network.The energy storage system provided in the application, power conversion module, battery management module and extension module are connected into EtherCAT network with master control module by EtherCAT bus.After master control module issues instruction signal, since each module is in the same level, therefore, the time interval of each module receiving instruction signal is short, and the data synchronization between modules is high.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage system and energy storage device. Background Technology

[0002] Energy storage systems contain multiple devices, each with different connection methods and communication levels. When receiving commands, the different levels of each device mean they cannot receive commands simultaneously, resulting in poor system synchronization. Utility Model Content

[0003] This application provides an energy storage system and an energy storage device to solve the above-mentioned technical problems.

[0004] In a first aspect, embodiments of this application provide an energy storage system, including:

[0005] The main control module is configured to send command signals;

[0006] Power converter module;

[0007] Battery management module;

[0008] Extended modules;

[0009] The power converter module, the battery management module, and the expansion module are all connected to the main control module via an EtherCAT bus to form an EtherCAT network. The power converter module, the battery management module, and the expansion module are all used to obtain the command signal through the EtherCAT network.

[0010] In conjunction with the first aspect, the main control module, the power converter module, the battery management module, and the expansion module are connected in series via the EtherCAT bus.

[0011] In conjunction with the first aspect, the power converter module has multiple modules, and the multiple power converter modules are connected in series between the main control module and the battery management module via the EtherCAT bus.

[0012] In conjunction with the first aspect, the battery management module has multiple modules, which are connected in series between the power converter module and the expansion module via the EtherCAT bus.

[0013] In conjunction with the first aspect, there are multiple power converter modules and multiple battery management modules, which are alternately connected in series between the main control module and the expansion module via the EtherCAT bus.

[0014] In conjunction with the first aspect, there are multiple power converter modules, battery management modules, and expansion modules. Multiple power converter modules and multiple battery management modules are connected to the expansion modules in alternating series via the EtherCAT bus to form a first energy storage cluster.

[0015] Multiple first energy storage clusters are connected to the main control module via the EtherCAT bus after being connected in series.

[0016] In conjunction with the first aspect, there are multiple power converter modules, battery management modules, and expansion modules. Multiple battery management modules are connected in series with the expansion modules via the EtherCAT bus to form a second energy storage cluster. Multiple power converter modules are connected in series via the EtherCAT bus to form a third energy storage cluster.

[0017] Multiple second energy storage clusters are connected in series via the EtherCAT bus to the third energy storage cluster and the main control module.

[0018] In conjunction with the first aspect, the power converter module is configured to connect to the power conversion system, and the battery management module is configured to connect to the battery.

[0019] In conjunction with the first aspect, the expansion module includes a bus interface, which includes any one or more of the following: a 485 bus interface, a CAN bus interface, a DIDO node interface, and an I2C bus interface.

[0020] In a second aspect, an energy storage device is provided, comprising an energy storage system as described in any one of the first aspects.

[0021] One of the above technical solutions has the following advantages or beneficial effects:

[0022] This application provides an energy storage system, including: a main control module configured to send command signals; a power converter module; a battery management module; and an expansion module. The power converter module, battery management module, and expansion module are all connected to the main control module via an EtherCAT bus to form an EtherCAT network. These modules are used to acquire command signals through the EtherCAT network. In the energy storage system provided by this application, the power converter module, battery management module, and expansion module are connected to the main control module via an EtherCAT bus to form an EtherCAT network. After the main control module sends a command signal, because all modules are at the same level, the time interval between receiving the command signal is short, and the data synchronization between modules is high. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 This is a schematic diagram of the module connection of an energy storage system provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the module connection of an energy storage system provided in another embodiment of this application;

[0027] Figure 3 A schematic diagram of the series connection of power converter modules in an energy storage system provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the connection of the battery management module in the energy storage system provided in the embodiments of this application.

[0029] Figure 5 A schematic diagram of the module connection after the power converter module and the battery management module are alternately connected in series in the energy storage system provided in the embodiment of this application;

[0030] Figure 6 A schematic diagram of the module connection after the power converter module and the battery management module are connected in series in the energy storage system provided in the embodiments of this application;

[0031] Figure 7 A schematic diagram of the module connection of the power converter module, battery management module and expansion module in series in the energy storage system provided in the embodiments of this application;

[0032] Figure 8 This is a connection diagram of the first energy storage cluster in the energy storage system provided in the embodiments of this application;

[0033] Figure 9 This is a schematic diagram of module connections in the first energy storage cluster provided in an embodiment of this application;

[0034] Figure 10 This is a schematic diagram showing the connection between the second and third energy storage clusters in an energy storage system provided in an embodiment of this application.

[0035] Figure 11 A schematic diagram of module connections for the second energy storage cluster provided in this application embodiment;

[0036] Figure 12 A schematic diagram of the module connections of the third energy storage cluster provided in the embodiments of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0040] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0041] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.

[0042] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0043] The specific implementation methods of this application are illustrated below through examples:

[0044] like Figure 1 As shown in the illustration, this application provides an energy storage system, including: a main control module configured to send command signals; a power converter module; a battery management module; and an expansion module. The power converter module, battery management module, and expansion module are all connected to the main control module via an EtherCAT bus to form an EtherCAT network. The power converter module, battery management module, and expansion module are all used to acquire command signals through the EtherCAT network. Specifically, EtherCAT (Ethernet for Control Automation Technology) is a real-time Ethernet communication technology for industrial automation control systems, designed to achieve high-performance and highly synchronized industrial control networks. It transmits data through the standard Ethernet frame protocol to support high-speed data exchange and distributed system control. The main control module is configured to be responsible for the overall information aggregation, control management, security protection, and network communication with the external network of the energy storage system; the power conversion module is configured to connect to the power conversion system (PCS), and is responsible for the control and data services of the power conversion system, receiving and executing the command signals sent by the main control module, uploading necessary sampling data and operating data, and performing security protection based on local information; the battery management module is configured to connect to the battery, collect battery signals, estimate battery status, and perform necessary security protection; the expansion module is used to integrate multiple bus interfaces for connecting various auxiliary equipment such as temperature control, fire protection, transformers, and air conditioning in the energy storage system.

[0045] It is understood that the energy storage system provided in this application embodiment connects the power converter module, battery management module, and expansion module to the main control module via an EtherCAT bus to form an EtherCAT network. After the main control module issues a command signal, since the power converter module, battery management module, and expansion module are at the same level, each module can quickly receive the command signal, thereby improving the synchronization of the energy storage system.

[0046] like Figure 1As shown in this embodiment, the main control module, power converter module, battery management module, and expansion module are connected in series via an EtherCAT bus. Specifically, the power converter module, battery management module, and expansion module are connected in series via the EtherCAT bus to two transceiver ports of the main control module, forming a chained EtherCAT network. Both transceiver ports of the main control module have information sending and receiving functions, and the main control module sends command signals simultaneously through both transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through the power converter module, battery management module, and expansion module, and returns to the main control module from the second transceiver port; in the second transceiver port, the command signal is transmitted sequentially through the expansion module, battery management module, and power converter module, and returns to the main control module from the first transceiver port. During this process, after receiving the command signal, the power converter module, battery management module, and expansion module obtain the data they need from the command signal, add the data that needs to be fed back to the command signal according to the requirements, and then transmit it. The main control module ultimately determines the status of the power converter module, battery management module, and expansion module based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0047] Understandably, by connecting the power converter module, battery management module, and expansion module in series with the main control module via the EtherCAT bus, bidirectional transmission of command signals can be achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network in series ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0048] like Figure 2 As shown in this embodiment, the power converter module, battery management module, and expansion module are connected to the three transceiver ports of the main control module via an EtherCAT bus, thus forming a star EtherCAT network. The main control module simultaneously sends command signals through the three transceiver ports. These command signals are transmitted to the power converter module, battery management module, and expansion module respectively before returning to the main control module. During this process, after receiving the command signals, the power converter module, battery management module, and expansion module obtain the data they need from the command signals and add the data that needs to be fed back to the command signals according to requirements, and then feed it back to the main control module. Finally, the main control module judges the status of the power converter module, battery management module, and expansion module based on the command signals received from each transceiver port, thereby realizing the transmission of command signals and the reception of data.

[0049] Understandably, by connecting the power converter module, battery management module, and expansion module to the main control module sequentially via the EtherCAT bus, unidirectional transmission of command signals can be achieved, ensuring that each module can quickly receive command signals, thereby improving the synchronization and efficiency of information transmission in the energy storage system.

[0050] like Figure 3 As shown, one embodiment of this application provides a connection method where multiple power converter modules are connected in series via an EtherCAT bus between the main control module and the battery management module. Specifically, in the case of an energy storage system including multiple power converter modules, the multiple power converter modules are connected in series via an EtherCAT bus and then sequentially connected in series with the battery management module and the expansion module. The series-connected power converter modules, battery management module, and expansion module are respectively connected to two transceiver ports of the main control module. The main control module simultaneously sends command signals through the two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through the multiple power converter modules, battery management module, and expansion module, and returns to the main control module from the second transceiver port; in the second transceiver port, the command signal is transmitted sequentially through the expansion module, battery management module, and multiple power converter modules, and returns to the main control module from the first transceiver port. During this process, after receiving the command signal, the multiple power converter modules, battery management module, and expansion module obtain the data they need from the command signal, and add the data that needs to be fed back to the command signal according to the requirements and then transmit it. The main control module ultimately determines the status of the power converter module, battery management module, and expansion module based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0051] Understandably, connecting multiple power converter modules, battery management modules, expansion modules, and main control modules in series via the EtherCAT bus enables bidirectional transmission of command signals, ensuring that each module accurately receives the command signals. Furthermore, forming an EtherCAT network in series ensures that command signal transmission continues even in the event of a break in the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0052] like Figure 4As shown, one embodiment of this application provides a connection method. Multiple battery management modules are connected in series via an EtherCAT bus between a power converter module and an expansion module. Specifically, when the energy storage system includes multiple battery management modules, these modules are connected in series via an EtherCAT bus and then sequentially connected in series with the power converter module and the expansion module. The series-connected battery management modules, power converter module, and expansion module are respectively connected to two transceiver ports of the main control module. The main control module simultaneously sends command signals through the two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through the power converter module, the multiple battery management modules, and the expansion module, and returns to the main control module from the second transceiver port. In the second transceiver port, the command signal is transmitted sequentially through the expansion module, the multiple battery management modules, and the power converter module, and returns to the main control module from the first transceiver port. During this process, after receiving the command signal, the power converter module, the multiple battery management modules, and the expansion module obtain their respective required data from the command signal, add the data that needs to be fed back to the command signal according to requirements, and then transmit it. The main control module ultimately determines the status of the power converter module, multiple battery management modules, and expansion modules based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0053] Understandably, connecting multiple battery management modules, power converter modules, expansion modules, and main control modules in series via the EtherCAT bus enables bidirectional transmission of command signals, ensuring that each module accurately receives the command signals. Furthermore, forming an EtherCAT network in series ensures that command signal transmission continues even in the event of a break in the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0054] like Figure 5As shown in this embodiment, there are multiple power converter modules and battery management modules. These multiple power converter modules and battery management modules are alternately connected in series between the main control module and the expansion module via an EtherCAT bus. Specifically, when the energy storage system includes multiple power converter modules and multiple battery management modules, the multiple power converter modules and multiple battery management modules are alternately connected in series via an EtherCAT bus. That is, the first power converter module is connected to the first battery management module, the first battery management module is connected to the second power converter module, the second power converter module is connected to the second battery management module, and so on, until the last battery management module or the last power converter module is connected. After the multiple power converter modules and multiple battery management modules are alternately connected in series, they are then connected in series with the expansion module. The connected multiple battery management modules, multiple power converter modules, and expansion modules are respectively connected to two transceiver ports of the main control module. The main control module simultaneously transmits command signals through two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through multiple power converter modules, multiple battery management modules, and expansion modules connected in alternating series, and returns to the main control module from the second transceiver port. In the second transceiver port, the command signal is transmitted sequentially through expansion modules, multiple battery management modules, and multiple power converter modules connected in alternating series, and returns to the main control module from the first transceiver port. During this process, upon receiving the command signal, each power converter module, battery management module, and expansion module retrieves its required data from the command signal and adds the necessary feedback data to the command signal as required, then transmits it. The main control module ultimately determines the status of the power converter modules, battery management modules, and expansion modules based on the command signals received from the two transceiver ports, thereby realizing the transmission of command signals and the reception of data.

[0055] Understandably, by alternately connecting multiple battery management modules and multiple power converter modules in series via the EtherCAT bus, and then connecting them in series with the expansion module and the main control module, bidirectional transmission of command signals is achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network in series ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0056] like Figure 6As shown, one embodiment of this application provides a connection method in which multiple power converter modules and battery management modules are included. These multiple power converter modules are connected in series via an EtherCAT bus, and then connected in series with multiple battery management modules via an EtherCAT bus. Furthermore, the multiple power converter modules and multiple battery management modules are connected in series between the main control module and the expansion module. Specifically, when the energy storage system includes multiple power converter modules and multiple battery management modules, the multiple power converter modules are connected in series via an EtherCAT bus, then connected in series with multiple battery management modules, and finally connected in series with the expansion modules. The series-connected multiple battery management modules, multiple power converter modules, and expansion modules are respectively connected to two transceiver ports of the main control module. The main control module simultaneously sends command signals through the two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through the multiple power converter modules, multiple battery management modules, and expansion modules, and returns to the main control module from the second transceiver port; in the second transceiver port, the command signal is transmitted sequentially through the expansion module, multiple battery management modules, and multiple power converter modules, and returns to the main control module from the first transceiver port. During this process, multiple power converter modules, battery management modules, and expansion modules, upon receiving the command signal, retrieve the data they require from the command signal and add the necessary feedback data to the command signal as needed, then transmit it forward. The main control module ultimately determines the status of the multiple power converter modules, battery management modules, and expansion modules based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0057] Understandably, by connecting multiple battery management modules and power converter modules in series via the EtherCAT bus, and then connecting them in series with the expansion module and main control module, bidirectional transmission of command signals is achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network through series connection ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0058] like Figure 7As shown, one embodiment of this application provides a connection method in which multiple power converter modules, battery management modules, and expansion modules are connected in series via an EtherCAT bus. Specifically, when the energy storage system includes multiple power converter modules, battery management modules, and expansion modules, these modules are connected in series via an EtherCAT bus. The series-connected battery management modules, power converter modules, and expansion modules are respectively connected to two transceiver ports of the main control module. The main control module simultaneously sends command signals through the two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through the multiple power converter modules, battery management modules, and expansion modules, and returns to the main control module from the second transceiver port; in the second transceiver port, the command signal is transmitted sequentially through the multiple expansion modules, battery management modules, and power converter modules, and returns to the main control module from the first transceiver port. During this process, multiple power converter modules, battery management modules, and expansion modules, upon receiving the command signal, extract the data they require from the command signal and add the necessary feedback data to the command signal as needed, then transmit it forward. The main control module ultimately determines the status of the multiple power converter modules, battery management modules, and expansion modules based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0059] Understandably, by sequentially connecting multiple battery management modules, multiple power converter modules, and multiple expansion modules in series via the EtherCAT bus, and then connecting them to the two transceiver ports of the main control module, bidirectional transmission of command signals is achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network in series ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0060] like Figure 8 and Figure 9As shown in this embodiment, there are multiple power converter modules, battery management modules, and expansion modules. Multiple power converter modules and multiple battery management modules are alternately connected in series via an EtherCAT bus and then connected to the expansion modules to form a first energy storage cluster. Multiple first energy storage clusters are then connected in series via an EtherCAT bus to the main control module. Specifically, when the energy storage system includes multiple power converter modules, multiple battery management modules, and multiple expansion modules, multiple power converter modules, multiple battery management modules, and one expansion module are alternately connected in series via an EtherCAT bus to form a first energy storage cluster. Then, multiple first energy storage clusters and expansion modules are connected in series via an EtherCAT bus to two transceiver ports of the main control module. The main control module simultaneously sends command signals through the two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through multiple first energy storage clusters and the expansion module, and returns to the main control module from the second transceiver port; in the second transceiver port, the command signal is transmitted sequentially through the expansion module and multiple first energy storage clusters, and returns to the main control module from the first transceiver port. During this process, upon receiving the command signal, multiple power converter modules, battery management modules, and expansion modules in the first energy storage cluster retrieve their respective required data from the command signal, add the data that needs to be fed back to the command signal as required, and then transmit it. The main control module ultimately determines the status of the multiple power converter modules, battery management modules, and expansion modules based on the command signals received from the two transceiver ports, thereby enabling the transmission of command signals and the reception of data.

[0061] Understandably, by connecting multiple first energy storage clusters—consisting of multiple battery management modules, multiple power converter modules, and one expansion module—in series via the EtherCAT bus, and then connecting these series-connected first energy storage clusters to the two transceiver ports of the main control module, bidirectional transmission of command signals is achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network using a clustering approach ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0062] like Figure 10 , Figure 11 and Figure 12As shown in this embodiment, there are multiple power converter modules, battery management modules, and expansion modules. Multiple battery management modules are connected in series with the expansion modules via an EtherCAT bus to form a second energy storage cluster. Multiple power converter modules are connected in series via an EtherCAT bus to form a third energy storage cluster. Multiple second energy storage clusters are connected in series via an EtherCAT bus to the third energy storage cluster and the main control module. Specifically, when the energy storage system includes multiple power converter modules, multiple battery management modules, and multiple expansion modules, multiple power converter modules and one expansion module are connected in series via an EtherCAT bus to form a second energy storage cluster; multiple battery management modules and one expansion module are connected in series via an EtherCAT bus to form a third energy storage cluster. Then, multiple second energy storage clusters, multiple third energy storage clusters, and the expansion modules are connected in series via an EtherCAT bus to the two transceiver ports of the main control module. The main control module simultaneously transmits command signals through two transceiver ports. In the first transceiver port, the command signal is transmitted sequentially through multiple second energy storage clusters, multiple third energy storage clusters, and expansion modules, and returns to the main control module from the second transceiver port. In the second transceiver port, the command signal is transmitted sequentially through the expansion modules, multiple second energy storage clusters, and multiple third energy storage clusters, and returns to the main control module from the first transceiver port. During this process, multiple power converter modules in the second energy storage clusters, and multiple battery management modules and expansion modules in the third energy storage clusters, upon receiving the command signal, retrieve the data they require from the command signal and add the necessary feedback data to the command signal as needed, then transmit it. The main control module ultimately determines the status of the multiple power converter modules, multiple battery management modules, and multiple expansion modules based on the command signals received from the two transceiver ports, thereby realizing the transmission of command signals and the reception of data.

[0063] Understandably, by connecting multiple second energy storage clusters (composed of multiple power converter modules and one expansion module connected in series) to multiple third energy storage clusters (composed of multiple battery management modules and one expansion module connected in series) via the EtherCAT bus, and then connecting these series-connected second and third energy storage clusters to the two transceiver ports of the main control module, bidirectional transmission of command signals is achieved, ensuring that each module can accurately receive command signals. Furthermore, forming an EtherCAT network using a clustering approach ensures that command signal transmission can still occur even if a break occurs in the middle of the EtherCAT bus, improving the stability of information transmission in the energy storage system.

[0064] In this embodiment, the expansion module includes a bus interface, which may be one or more of a 485 bus interface, a CAN bus interface, a DIDO node interface, and an I2C bus interface. Specifically, the energy storage system also includes various auxiliary devices, such as temperature control equipment, fire-fighting equipment, transformer equipment, and air conditioning. These devices use different protocol standards when interacting with the main control module of the energy storage system, thus requiring different interfaces for connection. By integrating the 485 bus interface, CAN bus interface, DIDO node interface, and I2C bus interface into one through the expansion module, and then connecting the expansion module to the main control module, centralized control of various data is achieved.

[0065] In this application embodiment, the 485 bus, namely RS-485 (Recommended Standard 485), is a serial communication interface standard that uses differential signal transmission, has strong anti-interference ability, long transmission distance, can realize half-duplex communication between multiple devices, and can connect multiple devices into a network to realize reliable data transmission and sharing.

[0066] CAN (Controller Area Network) bus is a serial communication protocol and interface standard that can effectively support distributed real-time control systems. In automobiles, it is used to connect various electronic control units such as engine control unit, transmission control unit, and airbag control unit, enabling fast and accurate communication and collaborative work between these units.

[0067] DIDO (Digital Input Digital Output) is a digital input / output interface used to enable interaction between devices and external digital signals. Digital inputs can receive external switching signals, such as button presses and releases, sensor triggers, etc.; digital outputs can control the switching states of external devices, such as controlling the engagement and disengagement of relays, the on / off state of indicator lights, etc., realizing the acquisition and control of various digital signals.

[0068] The I2C (Inter-Integrated Circuit) bus is a serial communication bus used to connect microcontrollers and their peripheral devices. It uses two lines, SCL (Serial Clock Line) and SDA (Serial Data Line), for data transmission. It supports multiple master and multiple slave modes and has advantages such as simple interface and few pins. It is often used to connect various chips to realize communication and data exchange between microcontrollers and these chips.

[0069] It is understandable that integrating the various interfaces of auxiliary equipment involved in the energy storage system onto the expansion module can improve the efficiency of acquiring information from radiation equipment.

[0070] In summary, it can be understood that by connecting different numbers of power converter modules, battery management modules, and expansion modules via the EtherCAT bus in various ways before connecting them to the main control module, it is ensured that each module can accurately receive command signals. Furthermore, by forming an EtherCAT network using serial and cluster methods, it is possible to ensure that command signal transmission can still be achieved even if a break occurs in the middle of the EtherCAT bus, thus improving the stability of information transmission in the energy storage system.

[0071] This application also provides an energy storage device, including the energy storage system provided in any of the above embodiments.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An energy storage system, characterized in that, include: The main control module is configured to send command signals; Power converter module; Battery management module; Extended modules; The power converter module, the battery management module, and the expansion module are all connected to the main control module via an EtherCAT bus to form an EtherCAT network. The power converter module, the battery management module, and the expansion module are all used to obtain the command signal through the EtherCAT network.

2. The energy storage system according to claim 1, characterized in that, The main control module, the power converter module, the battery management module, and the expansion module are connected in series via the EtherCAT bus.

3. The energy storage system according to claim 1, characterized in that, The power converter module is a plurality of such modules, which are connected in series between the main control module and the battery management module via the EtherCAT bus.

4. The energy storage system according to claim 1, characterized in that, The battery management module comprises multiple modules, which are connected in series between the power converter module and the expansion module via the EtherCAT bus.

5. The energy storage system according to claim 1, characterized in that, There are multiple power converter modules and multiple battery management modules, which are alternately connected in series between the main control module and the expansion module via the EtherCAT bus.

6. The energy storage system according to claim 1, characterized in that, The power converter module, the battery management module, and the expansion module are all multiple. The multiple power converter modules and the multiple battery management modules are connected to the expansion module in alternating series via the EtherCAT bus to form a first energy storage cluster. Multiple first energy storage clusters are connected to the main control module via the EtherCAT bus after being connected in series.

7. The energy storage system according to claim 1, characterized in that, The power converter module, the battery management module, and the expansion module are all in multiple form. The multiple battery management modules are connected in series with the expansion module via the EtherCAT bus to form a second energy storage cluster. The multiple power converter modules are connected in series via the EtherCAT bus to form a third energy storage cluster. Multiple second energy storage clusters are connected in series via the EtherCAT bus to the third energy storage cluster and the main control module.

8. The energy storage system according to claim 1, characterized in that, The power converter module is configured to connect to the power conversion system, and the battery management module is configured to connect to the battery.

9. The energy storage system according to claim 1, characterized in that, The expansion module includes a bus interface, which includes any one or more of the following: 485 bus interface, CAN bus interface, DIDO node interface, and I2C bus interface.

10. An energy storage device, characterized in that, Including the energy storage system as described in any one of claims 1-9.

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