Converging device applied to energy storage system and energy storage system

Abstract

The utility model discloses a convergence device applied to an energy storage system and the energy storage system. The converging device comprises a back plate; the backboard comprises a plurality of jacks used for connecting the convergence board cards. The convergence board card comprises a processing module and a transmission circuit; the transmission circuit is connected with the processing module; the transmission circuit comprises at least one first communication interface and at least two second communication interfaces; wherein the first communication interface is used for being connected with a control device in the energy storage system; the second communication interface is used for being connected with an interface expansion device in the energy storage system; the interface expansion device is connected with at least two energy storage sub-modules in the energy storage system. Therefore, the interface of the control device can be released through the convergence device, so that the use flexibility of the interface of the control device is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage control technology, and in particular to a convergence device and an energy storage system applied to an energy storage system. Background Art

[0002] As key infrastructure areas, UHVDC projects and energy storage facilities play a crucial role in my country's energy transition and green, low-carbon development. Energy storage facilities can effectively balance the gap between energy supply and demand, improving power supply reliability and flexibility, and are playing an increasingly important role in energy transition.

[0003] In the field of ultra-high voltage energy storage, due to the high voltage level, the energy storage valve needs to control a large number of submodules. In traditional energy storage valve control systems, expansion devices are used to aggregate data, which is then directly connected to the main control device for aggregation and processing. However, the large number of submodules in the ultra-high voltage energy storage field consumes a large number of interfaces on the main control device. Summary of the Invention

[0004] In view of this, embodiments of the present application at least provide a convergence device and an energy storage system applied to an energy storage system.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a convergence device for an energy storage system, the convergence device comprising a backplane; the backplane comprising a plurality of sockets for connecting a convergence board; the convergence board comprising a processing module and a transmission circuit; the transmission circuit being connected to the processing module; the transmission circuit comprising at least one first communication interface and at least two second communication interfaces; wherein the first communication interface is used to connect to a control device in the energy storage system; the second communication interface is used to connect to an interface expansion device in the energy storage system; the interface expansion device is connected to at least two energy storage sub-modules in the energy storage system.

[0007] In an embodiment of the present application, the convergence board is connected to the backplane via a socket on the backplane. The convergence board includes interconnected processing modules and transmission circuits, and the transmission circuit includes a first communication interface for connecting to a control device in the energy storage system, and a second communication interface for connecting to an interface expansion device in the energy storage system. In this way, by connecting at least two convergence boards in the convergence device, it is possible to connect at least two interface expansion devices through the convergence device. Compared with the related art in which the interface expansion device is directly connected to the control device, the convergence device can uniformly connect at least two interface expansion devices to the control device, thereby releasing the interface of the control device and improving the flexibility of the use of the interface of the control device.

[0008] In some embodiments, the transmission circuit in the aggregation board also includes a third communication interface; the socket includes a first bus socket; the aggregation board is connected to the first bus socket of the backplane through the third communication interface, so that the aggregation board is connected to the backplane bus of the backplane.

[0009] In the embodiment of the present application, different aggregation boards can be connected to the backplane bus provided in the backplane through their respective third communication interfaces, thereby connecting the various aggregation boards together through the backplane bus. In this way, although different aggregation boards are connected to different interface expansion devices, data communication can be achieved through the backplane bus. If a certain aggregation board fails, data from the failed aggregation board can be obtained through other aggregation boards, thereby improving the reliability of the aggregation device.

[0010] In some embodiments, the aggregation board also includes a first transceiver; the first transceiver is connected to the processing module in the aggregation board; the socket includes a second bus socket; the aggregation board is connected to the second bus socket of the backplane through the interface of the first transceiver, so that the aggregation board is connected to the management bus of the backplane.

[0011] In the embodiment of the present application, different aggregation boards can be connected to a management bus provided in the backplane via their respective first transceivers, thereby connecting the aggregation boards together via the management bus. In this way, different management data can be transmitted to the corresponding aggregation boards via the management bus, thereby achieving synchronous management of the aggregation boards and improving the consistency of the aggregation boards.

[0012] In some embodiments, the convergence board also includes a second transceiver, which is connected to the processing module; the second transceiver includes a debugging interface; wherein the debugging interface is used to connect an external debugging device; the signal transmission rate of the second transceiver is greater than the signal transmission rate of the first transceiver.

[0013] In the embodiment of the present application, a second transceiver connected to the processing module can provide a debugging interface for connecting to an external debugging device, thereby enabling debugging or upgrading the processing module through the external debugging device.

[0014] In a second aspect, an embodiment of the present application provides an energy storage system, which includes a control device, a convergence device, an interface expansion device, and at least two energy storage sub-modules; wherein, at least two energy storage sub-modules are connected to the interface expansion device; each pair of two energy storage sub-modules in the at least two energy storage sub-modules are connected to each other; the interface expansion device is connected to the second communication interface of the convergence device; and the first communication interface of the convergence device is connected to the control device.

[0015] In the embodiment of the present application, by providing a convergence device in the energy storage system, the control device is connected to multiple interface expansion devices through the convergence device, thereby freeing up the interfaces of the control device and improving the flexibility of using the interfaces of the control device.

[0016] In some embodiments, the energy storage system includes at least two energy storage submodule groups; each energy storage submodule group includes multiple energy storage submodules; and the at least two energy storage submodule groups are respectively connected to at least two interface expansion devices.

[0017] In the embodiment of the present application, each interface expansion device can be connected to an energy storage submodule group including at least two energy storage submodules. In this way, the convergence device can be connected to multiple energy storage submodule groups through the interface expansion device, thereby solving the problem of the convergence device requiring a large number of interfaces due to direct connection to multiple energy storage submodules.

[0018] In some embodiments, for each energy storage submodule group, each energy storage submodule in the energy storage submodule group is connected to the interface expansion device, and each energy storage submodule in the energy storage submodule group is connected to at least one energy storage submodule in the other energy storage submodule groups in at least two energy storage submodule groups.

[0019] In the embodiment of the present application, because each energy storage submodule in an energy storage submodule group is connected to at least one energy storage submodule in another energy storage submodule group in at least two energy storage submodule groups, in the event of a failure of the interface expansion device, data related to the energy storage submodule group corresponding to the failed interface expansion device can be transmitted through at least one energy storage submodule in another energy storage submodule group, thereby achieving a redundant configuration of the interface expansion device. Furthermore, the interface expansion device does not need to be connected to all energy storage submodules, thereby achieving a redundant configuration of the interface expansion device while reducing the usage of the interface expansion device.

[0020] In some embodiments, the number of control devices is at least two; the number of aggregation devices is at least two; wherein, at least two aggregation devices are respectively connected to at least two control devices; each aggregation device is connected to each interface expansion device of at least two interface expansion devices.

[0021] In the embodiments of the present application, both the control device and the aggregation device can be redundantly configured. This allows energy storage data from multiple energy storage submodules in the energy storage system to be uploaded to each control device. This reduces the risk of failure to control the energy storage submodules due to a control device failure. Furthermore, the two redundant control devices are interconnected, allowing control instructions generated by one control device to be backed up in another control device, thereby improving the reliability of the energy storage system.

[0022] In some embodiments, each of the at least two interface expansion devices includes multiple first interfaces and multiple second interfaces for connecting to the interface expansion board; wherein, the interface expansion device is connected to at least two energy storage sub-modules through the interface expansion board, and the interface expansion board is connected to each second interface; each of the at least two aggregation devices is connected to at least one second interface among the multiple second interfaces of each interface expansion device.

[0023] In the embodiment of the present application, because the multiple interface expansion boards connected to the interface expansion device are connected to each first interface of the interface expansion device, when the aggregation device is connected to the interface expansion device, it can be connected to one or more first interfaces of the interface expansion device, and can obtain data from all interface expansion boards in the interface expansion device, thereby reducing the number of interfaces used when the aggregation device is connected to the interface expansion device.

[0024] In some embodiments, each of the at least two control devices includes multiple control boards; the control device is connected to the convergence sub-device via the control boards; and at least two control devices are connected to each other via the control boards.

[0025] In an embodiment of the present application, the control device can be connected to multiple control boards in other control devices through its own multiple control boards, one-to-one, thereby forming multiple communication links, thereby realizing redundant communication connections between at least two control devices, and improving the reliability of the energy storage system.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the technical solutions of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to illustrate the technical solutions of the present application.

[0028] Figure 1a A schematic diagram of the composition structure of an energy storage system in related technology;

[0029] Figure 1b A schematic diagram of the structure of a converging device for an energy storage system provided in an embodiment of the present application;

[0030] Figure 2 Schematic diagram 1 of the composition structure of a convergence board provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of a convergence board provided in an embodiment of the present application Figure 2 ;

[0032] Figure 4 A schematic diagram of the structure of a convergence board provided in an embodiment of the present application Figure 3 ;

[0033] Figure 5 A schematic diagram of the structure of a convergence board provided in an embodiment of the present application Figure 4 ;

[0034] Figure 6 Schematic diagram 1 of the composition structure of an energy storage system provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application Figure 2 ;

[0036] Figure 8 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application Figure 3 ;

[0037] Figure 9 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application Figure 4 ;

[0038] Figure 10 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application Figure 5 . DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions of this application are further elaborated in detail below with reference to the accompanying drawings and embodiments. The described embodiments should not be regarded as limiting this application. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0041] The terms "first / second / third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first / second / third" can be interchanged with a specific order or sequence where permitted so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing this application only and are not intended to limit this application.

[0043] In traditional energy storage systems, data is aggregated through expansion devices, which are then connected to the main control device for aggregation and processing. However, the number of submodules under UHV is much greater than that under HV, so more expansion devices are needed to connect the submodules for control. Figure 1a As shown, the main control device A is connected to expansion device 1, expansion device 2, expansion device 3, and expansion device 4 respectively. Expansion device 1 is connected to SMC1, expansion device 2 is connected to SMC2, expansion device 3 is connected to SMC3, and expansion device 4 is connected to SMC4. It can be seen that in energy storage systems in related technologies, the main control device is directly connected to multiple expansion devices. Because the number of submodules under ultra-high voltage is large, the number of expansion devices used to aggregate data will also increase. A large number of expansion devices are directly connected to the main control device, which will result in a large number of interfaces in the main control device being occupied.

[0044] In order to solve the above technical problems, the embodiment of the present application provides a convergence device applied to an energy storage system, such as Figure 1b As shown, the convergence device 10 includes a backplane 200; the backplane 200 includes a plurality of sockets 201 for connecting the convergence board 100. It is understandable that, Figure 1b FIG. 2 is a structural diagram of the convergence device 10 when the socket 201 is connected to the convergence board 100 .

[0045] like Figure 2 As shown, the convergence board 100 includes a processing module 101 and a transmission circuit 102; the transmission circuit 102 is connected to the processing module 101; the transmission circuit 102 includes at least one first communication interface 1021 and at least two second communication interfaces 1022 ( Figure 2 shows a first communication interface 1021 and three second communication interfaces 1022); wherein,

[0046] A first communication interface 1021, used to connect to a control device in an energy storage system;

[0047] The second communication interface 1022 is used to connect to an interface expansion device in the energy storage system; the interface expansion device is connected to at least two energy storage sub-modules in the energy storage system.

[0048] In an embodiment of the present application, the convergence device further comprises a chassis, wherein the backplane is provided at the bottom of the internal space of the chassis. For example, the chassis may be a Verstatile Protocol Switch Bus (VPX) chassis.

[0049] In an embodiment of the present application, the interface of the backplane can be various bus interfaces, and the aggregation board also includes other communication interfaces for connecting the bus interfaces. In some embodiments, the other communication interface can be set on at least one of the processing module and the transmission circuit, and the other communication interface can also be set on the signal transceiver in the aggregation board. The signal transceiver can be connected to at least one of the processing module and the transmission circuit. The aggregation board is connected to various different bus interfaces of the backplane through other communication interfaces, so that the aggregation board is connected to various buses on the backplane, thereby enabling communication between at least two aggregation boards to exchange data.

[0050] In the embodiment of the present application, the first communication interface and the second communication interface of the transmission circuit may both be high-speed communication interfaces. Exemplarily, the high-speed communication interface may be a Gigabit Transceiver with Low Power (GTP).

[0051] In an embodiment of the present application, the transmission circuit can receive uplink data from the energy storage submodule via the second communication interface, transmitted by the interface expansion device. The transmission circuit then transmits the uplink data to the processing module. The processing module processes the uplink data and then transmits the processed uplink data to the transmission circuit. Finally, the transmission circuit transmits the processed uplink data to the control device of the energy storage system via the first communication interface. For example, the uplink data may include battery temperature, battery current, battery voltage, etc.

[0052] The processing module may process the uplink data by filtering, merging, etc.

[0053] In an embodiment of the present application, the transmission circuit can also receive downlink data transmitted by the control device through the first communication interface. The transmission circuit then transmits the downlink data to the processing module. After the processing module processes the downlink data, it can transmit the processed downlink data to the transmission circuit, and the transmission circuit transmits the processed downlink data to the interface expansion device through the second communication interface. Exemplarily, the downlink data can be a control instruction, and correspondingly, the way in which the processing module processes the control instruction can be to parse and process the control instruction. In some embodiments, because different interface expansion devices are connected to different energy storage sub-modules, the processing module needs to determine the transmission object of the downlink data when receiving the downlink data transmitted by the control device through the transmission circuit. Because the second communication interface corresponds to the interface expansion device, the downlink data can be transmitted to the corresponding interface expansion device through the second communication interface corresponding to the transmission object. Exemplarily, the above-mentioned uplink data can be a control instruction.

[0054] In some embodiments, if the transmission object of the downlink data is all energy storage sub-modules, the processing module can split the downlink data and then transmit the split downlink data to the transmission circuit. The transmission circuit transmits the split downlink data to each interface expansion device through different first communication interfaces, and each interface expansion device transmits the received downlink data to the corresponding energy storage sub-module.

[0055] It is understandable that the energy storage module processes uplink data or downlink data in a manner that can be an existing data processing manner. The embodiment of the present application does not limit the data processing manner of the energy storage module.

[0056] Exemplarily, the processing module may be a central processing unit (CPU), and the transmission module may be a field programmable gate array (FPGA).

[0057] In some embodiments, the processing module and the transmission module may be connected via a high-speed bus. In other embodiments, the processing module and the transmission module may also be connected via a shared memory.

[0058] In some embodiments, the socket in the backplane includes a power socket, and the convergence device further includes a power board, which can be connected to the backplane via the power socket. In this way, the power board connected to the backplane can provide power to the convergence card.

[0059] In an embodiment of the present application, the convergence device includes a backplane and at least two convergence boards, and the convergence board is connected to the backplane via a socket on the backplane. The convergence board includes a processing module and a transmission circuit that are interconnected, and the transmission circuit includes a first communication interface for connecting to a control device in the energy storage system, and a second communication interface for connecting to an interface expansion device in the energy storage system. In this way, by setting at least two convergence boards in the convergence device, it is possible to connect at least two interface expansion devices through the convergence device. Compared with the related art in which the interface expansion device is directly connected to the control device, the convergence device can connect at least two interface expansion devices to the control device in a unified manner, thereby releasing the interface of the control device, thereby improving the flexibility of using the interface of the control device.

[0060] In some embodiments, as Figure 3 As shown, the transmission circuit 102 in the convergence board 100 further includes a third communication interface 1023; the socket of the backplane includes a first bus socket ( Figure 3 aggregation board 100 is connected to the first bus socket of the backplane 200 via the third communication interface 1023, so that the aggregation board 100 is connected to the backplane bus of the backplane 200.

[0061] In the embodiment of the present application, different aggregation boards can be connected to the backplane bus provided in the backplane through their respective third communication interfaces, thereby connecting the various aggregation boards together through the backplane bus. In this way, although different aggregation boards are connected to different interface expansion devices, data communication can be achieved through the backplane bus. If a certain aggregation board fails, data from the failed aggregation board can be obtained through other aggregation boards, thereby improving the reliability of the aggregation device.

[0062] Exemplarily, the data exchanged between the aggregation boards through the backplane bus may be uplink data of the energy storage sub-modules.

[0063] In some embodiments, as Figure 4 As shown, the convergence board 100 further includes a first transceiver 104; the first transceiver 104 is connected to the processing module 101 in the convergence board 100; the socket includes a second bus socket ( Figure 3 aggregation board 100 is connected to the second bus socket of the backplane 200 through the interface of the first transceiver 104, so that the aggregation board 100 is connected to the management bus of the backplane 200.

[0064] Here, the first transceiver may be a transceiver for transmitting a low-speed signal. For example, the low-speed signal may be a CAN signal, and the corresponding first transceiver may be a CAN transceiver for providing a standard CAN bus communication function.

[0065] In an embodiment of the present application, the first transceiver is used to transmit low-speed management data, such as configuration parameters, time synchronization information, etc., between aggregation boards.

[0066] In the embodiment of the present application, the first transceiver can be connected to the processing module via a wire.

[0067] In the embodiment of the present application, different aggregation boards can be connected to a management bus provided in the backplane via their respective first transceivers, thereby connecting the aggregation boards together via the management bus. In this way, different management data can be transmitted to the corresponding aggregation boards via the management bus, thereby achieving synchronous management of the aggregation boards and improving the consistency of the aggregation boards.

[0068] In some embodiments, as Figure 5 As shown, the convergence board 100 further includes a second transceiver 105, which is connected to the processing module 101; the second transceiver 105 includes a debugging interface ( Figure 4 The debugging interface is used to connect to an external debugging device.

[0069] Here, the signal transmission rate of the second transceiver is greater than the signal transmission rate of the first transceiver, so the second transceiver can be a transceiver for transmitting high-speed signals. Exemplarily, the high-speed signal can be an Ethernet signal, and the corresponding second transceiver can be an Ethernet transceiver in the port physical layer (PHY).

[0070] In the embodiment of the present application, the processing module can provide an external Ethernet interface through the second transceiver to enable debugging and upgrading of the software in the processing module.

[0071] In the embodiment of the present application, a second transceiver connected to the processing module can provide a debugging interface for connecting to an external debugging device, thereby enabling debugging or upgrading the processing module through the external debugging device.

[0072] In the embodiment of the present application, the second transceiver is connected to the processing module via a wire.

[0073] In some embodiments, the convergence board further includes at least one storage module connected to the processing module; the storage module is configured to store the uplink and downlink data. Exemplarily, the processing module may be at least one of: non-volatile memory (NVM) and double data rate synchronous dynamic random access memory (DDR).

[0074] Figure 6 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the energy storage system 600 includes a control device 601, a convergence device 10, an interface expansion device 602 ( Figure 6 Two interface expansion devices 602) and at least two energy storage submodules 603 ( Figure 6 Two energy storage submodules 603 are shown); at least two energy storage submodules 603 are connected to the interface expansion device 602;

[0075] The interface expansion device 602 is connected to the second communication interface of the convergence device 10;

[0076] The first communication interface of the convergence device 10 is connected to the control device 601 .

[0077] In the embodiment of the present application, the convergence device can be connected to multiple interface expansion devices, each of which can be connected to multiple energy storage submodules. In this way, the control device can be connected to multiple interface expansion devices through the convergence device.

[0078] Here, the interface expansion device includes a plurality of interface expansion boards, and each interface expansion board can be connected to a plurality of energy storage sub-modules.

[0079] In some embodiments, at least two energy storage submodules can be connected to the interface expansion device in pairs, and each pair of at least two energy storage submodules can be interconnected. Thus, by interconnecting the paired energy storage submodules, a redundant configuration of the interface expansion device can be achieved while reducing the usage of the interface expansion device.

[0080] Exemplarily, the energy storage system includes an interface expansion device 1, an interface expansion device 2, an energy storage submodule 1, and an energy storage submodule 2. Specifically, the interface expansion device 1 is connected to the energy storage submodule 1, the interface expansion device 2 is connected to the energy storage submodule 2, and the energy storage submodule 1 is connected to the energy storage submodule 2. Because the energy storage submodule 1 is connected to the energy storage submodule 2, the interface expansion device 1 can obtain the energy storage data of the energy storage submodule 2, and the interface expansion device 1 can send control instructions of the energy storage submodule 2 to the energy storage submodule 2 through the energy storage submodule 1. The same applies to the interface expansion device 2.

[0081] When the aggregation device receives control instruction 1 for energy storage sub-module 1 and control instruction 2 for energy storage sub-module 2 issued by the control device, the aggregation device can send control instruction 1 and control instruction 2 to interface expansion device 1, and send control instruction 1 and control instruction 2 to interface expansion device 2.

[0082] When interface expansion device 1 and interface expansion device 2 are operating normally, interface expansion device 1 can send control instructions 1 and 2 to energy storage submodule 1. Energy storage submodule 1 can then respond to control instruction 1 for energy storage submodule 1 and perform corresponding actions. Similarly, interface expansion device 2 can send control instructions 1 and 2 to energy storage submodule 2. Energy storage submodule 2 can then respond to control instruction 2 for energy storage submodule 2 and perform corresponding actions.

[0083] If interface expansion device 2 fails and interface expansion device 1 is functioning normally, interface expansion device 2 will be unable to send control instructions 1 and 2 to energy storage sub-module 2. In this case, because interface expansion device 1 is functioning normally, interface expansion device 1 can send control instructions 1 and 2 to energy storage sub-module 1. Furthermore, because energy storage sub-module 1 is connected to energy storage sub-module 2, energy storage sub-module 1 can send control instruction 2 to energy storage sub-module 2. Therefore, energy storage sub-module 2 can receive control instruction 2 sent by energy storage sub-module 1 and perform the corresponding action even if interface expansion device 2 fails.

[0084] Similarly, when the interface expansion device 1 fails and the interface expansion device 2 is normal, the energy storage submodule 1 can receive the control instruction 1 sent by the energy storage submodule 2 when the interface expansion device 1 fails, and thus perform corresponding actions.

[0085] As can be seen from the above example, by interconnecting two paired energy storage submodules, a redundant interface expansion device can be implemented. This allows corresponding data to be transmitted via the energy storage submodules in the event of a failure in the interface expansion device, thereby improving the stability of the energy storage system. Furthermore, because the interface expansion device does not need to be connected to all energy storage submodules, redundant interface expansion device configuration is achieved without requiring the interface expansion device to connect to all energy storage submodule groups, thereby reducing the interface expansion device's usage.

[0086] In an embodiment of the present application, when the interface expansion device obtains energy storage data (i.e., uplink data) from the energy storage sub-module, the energy storage data can be transmitted to the transmission circuit of the aggregation board through the second communication interface of the aggregation board in the aggregation device; then the transmission circuit transmits the energy storage data to the processing module of the aggregation board, the processing module can process the energy storage data (for example, screening processing, merging processing), and transmit the processed energy storage data to the transmission circuit; the transmission circuit transmits the processed energy storage data to the control device through the first communication interface.

[0087] In an embodiment of the present application, when the control device generates a control instruction for controlling the energy storage submodule (i.e., downlink data), the control device can send the control instruction to the transmission circuit of the convergence board in the convergence device through the first communication interface; the transmission circuit then sends the control instruction to the processing module, which can process the control instruction (e.g., parse and determine the control instruction), split the processed control instruction into multiple control sub-instructions, and transmit the multiple control sub-instructions to the transmission circuit. The transmission circuit can distribute the control sub-instructions to the interface expansion device through the second communication interface corresponding to the control sub-instructions. Finally, the interface expansion device sends the control sub-instructions to the corresponding energy storage submodule.

[0088] It is understandable that in the related art, the control device is directly connected to the interface expansion device. This is because in the field of ultra-high voltage energy storage, the number of energy storage sub-modules is large. Even if the interface expansion device can connect multiple energy storage sub-modules, it is limited by the number of interfaces connected to the energy storage sub-modules in the interface expansion device, and the number of interface expansion devices is also large. Therefore, in the related art, in order to connect the control device to multiple interface expansion devices, a large number of interfaces of the control device need to be occupied, so that the control device cannot connect to other devices through its own interface. In the embodiment of the present application, by providing a convergence device in the energy storage system, the control device is connected to multiple interface expansion devices through the convergence device. In this way, the interface of the control device can be released, thereby improving the flexibility of using the interface of the control device.

[0089] In some embodiments, as Figure 7 As shown, the energy storage system includes at least two energy storage submodule groups 701 ; each energy storage submodule group 701 includes multiple energy storage submodules 603 ; and at least two energy storage submodule groups 701 are respectively connected to at least two interface expansion devices 602 .

[0090] In an embodiment of the present application, the method of dividing the energy storage submodule group can be divided according to the order of the module number of the energy storage submodule. For example, when the number of energy storage submodules is 200, and the serial numbers of the 200 energy storage submodules are SMC-1, SMC-2, SMC-3...SMC-200, then SMC-1 to SMC-100 can be used as an energy storage submodule group, and SMC-101 to SMC-200 can be used as an energy storage submodule group. The number of energy storage submodules in each energy storage submodule group in this method is the same. In other embodiments, the number of energy storage submodules in each energy storage submodule group can also be different, for example, SMC-1 to SMC-99 can be used as an energy storage submodule group, and SMC-100 to SMC-200 can be used as an energy storage submodule group.

[0091] In some embodiments, the multiple energy storage submodules of the energy storage submodule group may be interconnected or not. In the case where the multiple energy storage submodules are connected, the energy storage submodule group may be connected to the corresponding interface expansion device in such a way that one or more energy storage submodules within the energy storage submodule group are connected to the interface expansion device. It is understandable that because the multiple energy storage submodules within the energy storage submodule group are interconnected, the energy storage submodule group may be connected to the interface expansion device through only one energy storage submodule. Similarly, if only some of the multiple energy storage submodules of the energy storage submodule group are interconnected, then for the energy storage submodules that are not connected, the energy storage submodule is connected to the interface expansion device; for the energy storage submodules that are interconnected, the energy storage submodule may be connected to the interface expansion device through one of the interconnected energy storage submodules. That is to say, when the multiple energy storage submodules of the energy storage submodule group are not connected to each other, each energy storage submodule in the energy storage submodule group needs to be connected to the interface expansion device.

[0092] In the embodiment of the present application, each interface expansion device can be connected to an energy storage submodule group including at least two energy storage submodules. In this way, the convergence device can be connected to multiple energy storage submodule groups through the interface expansion device, thereby solving the problem of the convergence device requiring a large number of interfaces due to direct connection to multiple energy storage submodules.

[0093] In some embodiments, as Figure 7 As shown, for each energy storage submodule group 701, each energy storage submodule 603 in the energy storage submodule group 701 is connected to the interface expansion device 602, and each energy storage submodule 603 in the energy storage submodule group 701 is connected to at least one energy storage submodule 603 of other energy storage submodule groups in at least two energy storage submodule groups 701.

[0094] For example, Figure 7 The diagram shows four interface expansion devices and four energy storage submodule groups, each of which includes three energy storage submodules. The four interface expansion devices correspond one-to-one to the four energy storage submodule groups, and the three energy storage submodules in one energy storage submodule group are all connected to the corresponding interface expansion device.

[0095] Here, the other energy storage submodule groups in the at least two energy storage submodule groups may be one or more energy storage submodule groups. Figure 7 In the embodiment, the other energy storage submodule groups are adjacent energy storage submodule groups, and the three energy storage submodules in one energy storage submodule group are connected to the three energy storage submodules in another energy storage submodule group in a one-to-one correspondence.

[0096] In some embodiments, the other energy storage sub-module groups may also be a plurality of non-adjacent energy storage sub-module groups.

[0097] In the embodiment of the present application, because each energy storage submodule in an energy storage submodule group is connected to at least one energy storage submodule in another energy storage submodule group in at least two energy storage submodule groups, in the event of a failure of the interface expansion device, data related to the energy storage submodule group corresponding to the failed interface expansion device can be transmitted through at least one energy storage submodule in another energy storage submodule group, thereby achieving a redundant configuration of the interface expansion device. Furthermore, the interface expansion device does not need to be connected to all energy storage submodules, thereby achieving a redundant configuration of the interface expansion device while reducing the usage of the interface expansion device.

[0098] In some embodiments, as Figure 8 As shown, the number of control devices 601 is at least two, and the number of convergence devices 10 is at least two ( Figure 8 The number of control devices and aggregation devices shown is 2); wherein, at least two aggregation devices 10 are respectively connected to at least two control devices 601; each aggregation device 10 is connected to each interface expansion device 602 of at least two interface expansion devices 602.

[0099] In the embodiments of the present application, both the control device and the aggregation device can be redundantly configured. This allows energy storage data from multiple energy storage submodules in the energy storage system to be uploaded to each control device. This reduces the risk of failure to control the energy storage submodules due to a control device failure. Furthermore, the two redundant control devices are interconnected, allowing control instructions generated by one control device to be backed up in another control device, thereby improving the reliability of the energy storage system.

[0100] In some embodiments, each of the at least two control devices includes a plurality of control boards; the control device is connected to the convergence device via the control boards; and the at least two control devices are connected to each other via the control boards.

[0101] Here, the control board may include a CPU, which can generate control instructions for the energy storage submodule.

[0102] Exemplarily, the control device 1 includes a control board 1 and a control board 2, and the control device 2 includes a control board 3 and a control board 4. The connection relationship between the control device 1 and the control device 2 can be that the control board 1 is connected to the control board 3, and the control board 2 is connected to the control board 4.

[0103] In an embodiment of the present application, the control device can be connected to multiple control boards in other control devices through its own multiple control boards, one-to-one, thereby forming multiple communication links, thereby realizing redundant communication connections between at least two control devices, and improving the reliability of the energy storage system.

[0104] In some embodiments, as Figure 9 As shown, at least two interface expansion devices 602 ( Figure 9 Each interface expansion device 602 (six interface expansion devices are shown in the figure) includes multiple first interfaces (not shown in the figure) for connecting to the interface expansion board 6021 and multiple second interfaces 6022; wherein, the interface expansion device 602 is connected to at least two energy storage sub-modules 603 through the interface expansion board 6021, and the interface expansion board 6021 is connected to each second interface 6022; each aggregation device 10 of the at least two aggregation devices 10 is connected to at least one second interface 6022 of the multiple second interfaces 6022 of each interface expansion device 602.

[0105] In the embodiment of the present application, because the multiple interface expansion boards connected to the interface expansion device are connected to each first interface of the interface expansion device, when the aggregation device is connected to the interface expansion device, it can be connected to one or more first interfaces of the interface expansion device, and can obtain data from all interface expansion boards in the interface expansion device, thereby reducing the number of interfaces used when the aggregation device is connected to the interface expansion device.

[0106] In some embodiments, as Figure 10 As shown, the energy storage system includes a first master control device 1001, a second master control device 1002, a first convergence device 1003, a second convergence device 1004, a first expansion device 1005, a second expansion device 1006, a third expansion device 1007, a fourth expansion device 1008, a fifth expansion device 1009, a sixth expansion device 1010, and SMC-1 (energy storage submodule) to SMC-600, wherein:

[0107] The first main control device 1001 includes a plurality of first main control boards 10011, and the second main control device 1002 includes a plurality of second main control boards 10012. The first main control boards 10011 are connected to the second main control boards 10012. Figure 10 As shown, the two first main control boards 10011 in the first main control device 1001 are connected in a one-to-one correspondence with the two first main control boards 10021 in the second main control device 1002. The first main control board and the second main control board can be CPUs.

[0108] The first convergence device 1003 includes multiple first convergence boards 10031 , each of which is connected to the first main control board 10011 . The second convergence device 1004 includes multiple first convergence boards 10041 , each of which is connected to the second main control board 10021 .

[0109] In the embodiment of the present application, the first convergence device and the second convergence device are flexibly configured by increasing or decreasing the number of convergence boards.

[0110] like Figure 10 As shown, the first expansion device 1005 includes a first sub-expansion device 10051 and a second sub-expansion device 10052, the second expansion device 1006 includes a third sub-expansion device 10061 and a fourth sub-expansion device 10062, the third expansion device 1007 includes a fifth sub-expansion device 10071 and a sixth sub-expansion device 10072, the fourth expansion device 1008 includes a seventh sub-expansion device 10081 and an eighth sub-expansion device 10082, the fifth expansion device 1009 includes a ninth sub-expansion device 10091 and a tenth sub-expansion device 10092, and the sixth expansion device 1010 includes an eleventh sub-expansion device 10101 and a twelfth sub-expansion device 10102.

[0111] The first convergence board 10031 in the first convergence device 1003 is respectively connected to the first sub-expansion device 10051, the third sub-expansion device 10061, the fifth sub-expansion device 10071, the seventh sub-expansion device 10081, the ninth sub-expansion device 10091, and the eleventh sub-expansion device 10101; the first convergence board 10041 in the second convergence device 1004 is respectively connected to the second sub-expansion device 10052, the fourth sub-expansion device 10062, the sixth sub-expansion device 10072, the eighth sub-expansion device 10082, the tenth sub-expansion device 10092, and the twelfth sub-expansion device 10102.

[0112] In the embodiment of the present application, each sub-expansion device includes multiple expansion boards. Figure 10 It is shown that one expansion device includes two sub-expansion devices, and each sub-expansion device includes six expansion boards, that is, one expansion device includes 12 expansion boards, and the 12 expansion boards are connected to each other.

[0113] like Figure 10 As shown, SMC-1 to SMC-100 are respectively connected to the expansion boards in the first expansion device 1005; SMC-101 to SMC-200 are respectively connected to the expansion boards in the second expansion device 1006, and SMC-1 is connected to SMC-101, SMC-2 is connected to SMC-102...SMC-100 is connected to SMC-200.

[0114] SMC-201 to SMC-300 are respectively connected to the expansion board in the third expansion device 1007; SMC-301 to SMC-400 are respectively connected to the expansion board in the fourth expansion device 1008, and SMC-201 is connected to SMC-301, SMC-202 is connected to SMC-302...SMC-300 is connected to SMC-400.

[0115] SMC-401 to SMC-500 are respectively connected to the expansion board in the fifth expansion device 1009; SMC-501 to SMC-600 are respectively connected to the expansion board in the sixth expansion device 1010, and SMC-401 is connected to SMC-501, SMC-402 is connected to SMC-502...SMC-500 is connected to SMC-600.

[0116] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned steps / processes does not mean the order of execution, and the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0117] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0118] The above is only an implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A converging device applied to an energy storage system, characterized in that: The convergence device includes a backplane; the backplane includes a plurality of sockets for connecting convergence boards; The convergence board includes a processing module and a transmission circuit; the transmission circuit is connected to the processing module; the transmission circuit includes at least one first communication interface and at least two second communication interfaces; wherein, The first communication interface is used to connect to the control device in the energy storage system; The second communication interface is used to connect to an interface expansion device in the energy storage system; the interface expansion device is connected to at least two energy storage sub-modules in the energy storage system.

2. The converging device according to claim 1, characterized in that The transmission circuit in the convergence board also includes a third communication interface; the socket includes a first bus socket; The convergence board is connected to the first bus socket of the backplane via the third communication interface, so that the convergence board is connected to the backplane bus of the backplane.

3. The converging device according to claim 1 or 2, characterized in that: The convergence board also includes a first transceiver; the first transceiver is connected to the processing module in the convergence board; the socket includes a second bus socket; The convergence board is connected to the second bus socket of the backplane through the interface of the first transceiver, so that the convergence board is connected to the management bus of the backplane.

4. The converging device according to claim 3, characterized in that The convergence board also includes a second transceiver, which is connected to the processing module; the second transceiver includes a debugging interface; wherein, The debugging interface is used to connect to an external debugging device; the signal transmission rate of the second transceiver is greater than the signal transmission rate of the first transceiver.

5. An energy storage system, characterized in that: The energy storage system includes a control device, a convergence device, an interface expansion device and at least two energy storage submodules; wherein, The at least two energy storage submodules are connected to the interface expansion device; each pair of two energy storage submodules in the at least two energy storage submodules are connected to each other; The interface expansion device is connected to the second communication interface of the convergence device; and the first communication interface of the convergence device is connected to the control device.

6. The energy storage system according to claim 5, characterized in that: The energy storage system includes at least two energy storage submodule groups; each of the energy storage submodule groups includes a plurality of the energy storage submodules; and the at least two energy storage submodule groups are respectively connected to at least two of the interface expansion devices.

7. The energy storage system according to claim 6, characterized in that: For each of the energy storage submodule groups, each of the energy storage submodules in the energy storage submodule group is connected to the interface expansion device, and each of the energy storage submodules in the energy storage submodule group is connected to at least one energy storage submodule of the other energy storage submodule groups in the at least two energy storage submodule groups.

8. The energy storage system according to claim 6 or 7, characterized in that: The number of the control devices is at least two; the number of the convergence devices is at least two; wherein, at least two of the convergence devices are connected to at least two of the control devices respectively; Each of the convergence devices is connected to each of the at least two interface expansion devices.

9. The energy storage system according to claim 8, characterized in that: Each of the at least two interface expansion devices comprises a plurality of first interfaces and a plurality of second interfaces for connecting to interface expansion boards; wherein, The interface expansion device is connected to the at least two energy storage submodules via the interface expansion board, and the interface expansion board is connected to each of the second interfaces; Each of the at least two aggregation devices is connected to at least one second interface of the plurality of second interfaces of each interface expansion device.

10. The energy storage system according to claim 8, characterized in that: Each of the at least two control devices includes a plurality of control boards; the control device is connected to the corresponding convergence device via the control boards; and at least two control devices are connected to each other via the control boards.

Images