Energy storage valve centralized control device, energy storage valve control method and energy storage system

Abstract

The invention discloses an energy storage valve centralized control device, an energy storage valve control method and an energy storage system.The energy storage valve centralized control device comprises a case, functional board cards and a connecting board card, the functional board cards and the connecting board card are arranged in the case, and the functional board cards communicate with one another through data lines of the connecting board card; the function board card comprises a board card used for transmitting and receiving data with the battery management unit in the battery module and a board card used for transmitting and receiving data with the power module. Functional board cards including a board card used for carrying out data transceiving with a battery management unit in a battery module and a card used for carrying out data transceiving with a power module are arranged in a case, and the functional board cards communicate with one another through data lines connected with the board cards, so that internal data sharing is realized, and the energy storage information interaction efficiency is improved.

Description

Energy storage valve centralized control device, energy storage valve control method and energy storage system Technical Field

[0001] The present invention relates to the technical field of power system energy storage technology, and in particular to an energy storage valve centralized control device, an energy storage valve control method, and an energy storage system. Background Art

[0002] In flexible direct-current valve energy storage solutions, the valve control system needs to obtain data such as battery charge and fault information to perform operations such as voltage balancing and unlocking and locking. As voltage levels increase, a large amount of information exchange is required, and traditional valve control systems cannot meet the needs of new power systems. Therefore, improving the efficiency of energy storage information exchange is a pressing issue.

[0003] Summary of the Invention

[0004] According to various embodiments of the present application, a storage valve centralized control device, a storage valve control method, and an energy storage system are provided.

[0005] In the first aspect, the present application provides a centralized control device for an energy storage valve, comprising a chassis, and functional boards and connection boards arranged in the chassis. The functional boards communicate with each other through data lines of the connection boards. The functional boards include boards for sending and receiving data with a battery management unit in a battery module, and boards for sending and receiving data with a power module.

[0006] The above-mentioned energy storage valve centralized control device sets functional boards, including boards for sending and receiving data with the battery management unit in the battery module and boards for sending and receiving data with the power module, in a chassis. The functional boards communicate with each other through data cables connecting the boards, realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0007] In one embodiment, the functional boards include a main control board, a communication expansion board, and a driver board. The main control board communicates with the communication expansion board and the driver board via data lines connecting the boards. The communication expansion board is used to transmit and receive data with the battery management unit in the battery module, and the driver board is used to transmit and receive data with the power module. Using the main control board to communicate with the communication expansion board and the driver board via the data lines connecting the boards supports data analysis and control within the energy storage valve centralized control device, further improving the integration of the energy storage valve centralized control device.

[0008] In one embodiment, the communication expansion board is a fiber optic communication expansion board, and / or the driver board is a fiber optic driver board. Fiber optic communication is used with the battery management unit and / or the power module, and signal transmission is stable and reliable.

[0009] In one embodiment, upon receiving the fire alarm signal uploaded by the battery management unit, the fiber optic communication expansion board converts the fire alarm signal into an electrical signal through photoelectric conversion, and then transmits the electrical signal to the main control board via the data line of the connection board. The fiber optic communication expansion board converts the fire alarm signal uploaded by the battery management unit into photoelectric conversion, and then transmits the electrical signal to the main control board via the data line of the connection board. This enables the fire alarm information uploaded by the battery management unit to be processed in a timely manner, thereby improving the operational safety of the battery module.

[0010] In one embodiment, the fiber optic driver board receives a drive signal from the main control board via a data line connected to the board, and controls the delayed switching of the switches in the power module based on the drive signal. This delayed switching of the switches in the power module based on the drive signal from the main control board implements dead zone protection for the power module and improves control reliability.

[0011] In one embodiment, the fiber optic driver board is further configured to receive fault status information fed back by the power module and transmit the fault status information to the main control board via the data line of the connection board. The main control board generates and outputs a corresponding fault identifier based on the fault status information. The fiber optic driver board transmits the fault status information fed back by the power module to the main control board, which generates and outputs a corresponding fault identifier to facilitate identification of the specific fault type.

[0012] In one embodiment, the functional board also includes a high-voltage acquisition board connected to the power module. The high-voltage acquisition board is used to sample the capacitor voltage in the power module and transmit the sampled voltage to the main control board via the data line of the connection board. By installing the high-voltage acquisition board in the energy storage valve centralized control device, the capacitor voltage of the power module can be sampled, allowing the main control board to monitor the capacitor voltage of the power module.

[0013] In one embodiment, the main control board removes the maximum and minimum values ​​from the received sampled voltage and calculates the voltage average. Calculating the voltage average after removing the maximum and minimum values ​​can avoid single-point data anomalies that could cause protection failures.

[0014] In one embodiment, the high-voltage acquisition board includes an operational amplifier circuit, an analog-to-digital conversion chip, and a digital isolator. The operational amplifier circuit connects the power amplifier module and the analog-to-digital conversion chip, and the digital isolator connects the analog-to-digital conversion signal to the connection board. The operational amplifier circuit and the analog-to-digital conversion chip process and convert the high voltage capacitor voltage of the power amplifier module, and transmit it to the connection board via the digital isolator, thereby improving the voltage acquisition reliability of the high-voltage acquisition board.

[0015] In one embodiment, the high-voltage acquisition board further includes a monitoring circuit connected to the operational amplifier circuit, the analog-to-digital conversion chip, and the connection board. Upon detecting an abnormality in the operational amplifier circuit or the analog-to-digital conversion chip, the monitoring circuit transmits an alarm signal to the main control board via a data line of the connection board. Upon detecting an abnormality in the operational amplifier circuit or the analog-to-digital conversion chip, the monitoring circuit transmits an alarm signal to the main control board, thereby ensuring the operational reliability of the high-voltage acquisition board.

[0016] In one embodiment, the functional board also includes a low-voltage acquisition board connected to an environmental data acquisition device. The low-voltage acquisition board receives environmental data from the environmental data acquisition device and transmits the environmental data to the main control board via a data line connected to the board. The low-voltage acquisition board is provided within the energy storage valve centralized control device to communicate with the environmental data acquisition device, thereby enabling monitoring and collection of environmental data by the energy storage valve centralized control device.

[0017] In one embodiment, the function board also includes a high-side driver board connected to the status indication device. The high-side driver board receives status indication instructions sent by the main control board via a data line connected to the board, and controls the status indication device according to the status indication instructions. The high-side driver board is provided within the energy storage valve centralized control device and connected to the status indication device to facilitate corresponding status indication.

[0018] In one embodiment, the function board also includes an input board for receiving external switch signals, and / or the function board also includes a backup board. The input board is provided within the energy storage valve centralized control device to facilitate the collection of external switch signals. The backup board within the energy storage valve centralized control device facilitates functional expansion.

[0019] In one embodiment, the functional board also includes a power board for connecting to an external AC / DC power supply. The power board is provided inside the energy storage valve centralized control device to connect to the external AC / DC power supply to power other functional boards.

[0020] In one embodiment, there are two or more power boards, and each power board is connected to an independent power bus in the connection board. Connecting multiple power boards to independent power buses in the connection board allows independent power supply to other functional boards, thereby improving power supply reliability.

[0021] In one embodiment, the energy storage valve centralized control device further includes a board guide rail and a clip disposed within the chassis. The functional board is disposed within the chassis via the board guide rail and secured with the clip. The board guide rail within the chassis facilitates disassembly, assembly, and replacement of the functional board, while the clip secures the functional board more securely.

[0022] In one embodiment, the data line connecting the board includes at least one of a CAN (Controller Area Network) bus, a 100M Ethernet cable, a SERDES (Serializer-Deserializer) line, an LVDS (Low-Voltage Differential Signaling) differential line, and a single-ended signal line. The specific type of data line in the connecting board can be selected based on data transmission needs to facilitate data transmission.

[0023] In one embodiment, the chassis is a metal shell and is designed to be at the same potential as the power module. Designing the chassis as a metal shell and being at the same potential as the power module enables the energy storage valve centralized control device to have electromagnetic shielding function and improves safety in use.

[0024] In a second aspect, the present application provides a method for controlling an energy storage valve, comprising:

[0025] Receive data sent by the battery management unit in the battery module through the data line of the connecting board; the data is obtained by the board in the functional board that sends and receives data with the battery management unit and is transmitted to the data line of the connecting board;

[0026] The driving signal is sent to the board in the functional board that receives and sends data with the power module through the data line of the connecting board; the driving signal is used to control the power module; and the functional boards communicate with each other through the data line of the connecting board.

[0027] The above-mentioned energy storage valve control method enables communication between functional boards, including the board used to transmit and receive data with the battery management unit in the battery module and the board used to transmit and receive data with the power module, through the data lines connecting the boards, thereby realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0028] In a third aspect, the present application provides an energy storage system, comprising a power module, a battery module and the above-mentioned energy storage valve centralized control device, wherein the energy storage valve centralized control device is connected to the power module and the battery module.

[0029] The above-mentioned energy storage system sets functional boards, including boards for sending and receiving data with the battery management unit in the battery module and boards for sending and receiving data with the power module, in the chassis. The functional boards communicate with each other through data cables connecting the boards, realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0030] In one embodiment, the energy storage system further includes an environmental data acquisition device and a status indication device connected to the energy storage valve centralized control device. The energy storage valve centralized control device is connected to the environmental data acquisition device and the status indication device to collect environmental data and provide corresponding status indications.

[0031] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] FIG1 is a schematic diagram of an application environment of an energy storage valve centralized control device according to an embodiment;

[0034] FIG2 is a schematic structural diagram of an energy storage valve centralized control device according to an embodiment;

[0035] FIG3 is a schematic diagram of the external connection of the energy storage valve centralized control device in one embodiment

[0036] FIG4 is a schematic diagram of the internal connections of an energy storage valve centralized control device in one embodiment. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0038] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0045] As voltage levels increase, a large amount of information exchange is required, and traditional valve control systems cannot meet the needs of new power systems. The energy storage valve centralized control device provided in this application installs functional boards, including boards for transmitting and receiving data with the battery management unit in the battery module and boards for transmitting and receiving data with the power module, in a chassis. The functional boards communicate with each other via data cables connecting the boards, enabling internal data sharing and improving the efficiency of energy storage information exchange.

[0046] Specifically, to accelerate the construction of future power systems, promote low-carbon energy transitions, and fully leverage the support of flexible direct current transmission technology for these systems, it is crucial to develop flexible direct current (DC) equivalent to synchronous generator technology. The power delivered by isolated renewable energy sources via flexible direct current (DC) is volatile and random, making it difficult to provide equivalent rotational inertia to the system using synchronous generators. Research into combining flexible direct current (DC) technology with energy storage is a key technical approach to addressing this challenge. Current flexible direct current (DC) valve energy storage solutions exist, depending on the energy storage location: flexible direct current valve energy storage (adding energy storage elements within the flexible direct current valve submodule) and independent energy storage device (designing an independent energy storage device on the DC bus). Regardless of the chosen solution, the valve control system requires data such as battery charge and fault information to perform voltage balancing, unlocking, and locking operations based on this data. In existing technologies, the valve control system and the battery management system (BMS) are typically separated, with limited data exchange between the two systems achieved through communication between the power module control chassis and the battery cluster control chassis. The current solution can meet simple control and monitoring application scenarios. However, with the increase of voltage levels, there are a large number of information interaction needs. At this time, the data interaction technology between the power module control chassis and the battery cluster control chassis has become a bottleneck restricting the development of flexible direct current energy storage technology. Based on this, the present application provides a storage valve centralized control device, in which the functional boards in the chassis communicate with each other through data lines connecting the boards. The functional boards include boards for sending and receiving data with the battery management unit in the battery module, and boards for sending and receiving data with the power module. By integrating the traditional power module control chassis and the battery cluster control chassis into one, the integrated power unit control and protection functions and the battery cluster control and protection functions are realized, and the original external communication is changed to internal data sharing, which improves the efficiency of information interaction and removes obstacles to improving product performance.

[0047] The energy storage valve centralized control device provided in the embodiments of the present application can be applied in the application environment shown in Figure 1. The energy storage valve unit can be a full-bridge or half-bridge energy storage valve unit. Taking the half-bridge energy storage valve unit as an example, the half-bridge energy storage valve unit includes a power module 1 and a battery module 2. The power module 1 is a half-bridge power module connected to the external power grid and the battery module 2. The side where the power module 1 is connected to the battery module 2 is provided with a capacitor C and a resistor R in parallel. The battery module 2 includes a battery cluster BT formed by multiple battery packs connected in series. Each battery pack is connected to a battery management unit. The function board of the energy storage valve centralized control device used for sending and receiving data with the battery management unit in the battery module can be used as a communication expansion board, and the board used for sending and receiving data with the power module can be used as a drive board. The communication expansion board is connected to the battery management unit for data communication. The drive board is connected to the switch tube Q1 and the switch tube Q2 in the power module 1, and is used to drive the switch tube Q1 and the switch tube Q2 to switch on and off. The switch tube Q1 and the switch tube Q2 can specifically use IGBT (Insulated Gate Bipolar Transistor).

[0048] In one embodiment, as shown in Figure 2, a storage valve centralized control device is provided, including a chassis 110, and a functional board 120 and a connection board 130 arranged in the chassis 110. The functional boards 120 communicate with each other through the data lines of the connection boards 130. The functional boards 120 include boards for sending and receiving data with the battery management unit in the battery module, and boards for sending and receiving data with the power module.

[0049] Among them, the specific number and type of the functional board cards 120 are not unique. When the size of the chassis 110 is fixed, in addition to the board cards with specific functions, the functional board cards 120 may also have spare board cards, that is, empty panel cards, which are used to fill the excess board card positions of the chassis 110. When the energy storage valve control device needs to add boards with other functions, the spare board cards can be replaced with boards with new functions. The functional board cards 120 can be fixedly installed in the chassis 110 or detachably arranged in the chassis 110. Specifically, the functional board cards include a communication expansion board card and a driver board card. The communication expansion board card is used to transmit and receive data with the battery management unit in the battery module, and the driver board card is used to transmit and receive data with the power module. It should be noted that the driver board card and the power module can be directly connected or indirectly connected.

[0050] The data transmission method between the communication expansion board and the driver board and the external device is not unique, and communication can be carried out through optical fiber, data cable or wireless method. In one embodiment, the communication expansion board is an optical fiber communication expansion board 121, and / or the driver board is an optical fiber driver board 122. Optical fiber communication is adopted with the battery management unit and / or the power module, and the signal transmission is stable and reliable. As shown in Figure 3, an optical fiber communication expansion board 121 is adopted to realize optical fiber communication with the battery management unit of the lower level of the battery cluster, supporting the IEC60044-8 protocol. The optical fiber driver board 122 is used to connect the IGBT in the power module to realize the issuance of IGBT drive instructions. Furthermore, the number of optical fiber communication expansion boards 121 can be more than 2, for example, it can be designed to be 3.

[0051] In one embodiment, the chassis 110 is a metal shell and is designed to be at the same potential as the power module. The energy storage valve centralized control device adopts an all-metal shell design, which has good electromagnetic shielding performance. At the same time, the chassis 110 is designed to be at the same potential as the power module, which improves the safety of use.

[0052] In one embodiment, the energy storage valve centralized control device further includes a board guide rail and a clip disposed within the chassis. The functional board 120 is disposed within the chassis via the board guide rail and secured with the clip. Specifically, the functional board 120 adopts a vertical plug-in design, with the board guide rail installed within the chassis 110. The functional board 120 is secured to the chassis 110 using a clip design. The board guide rail within the chassis 110 facilitates the disassembly, assembly, and replacement of the functional board 120, while the clip secures the functional board 120, making it more secure.

[0053] The specific type and location of the connecting board 130 are not unique. For example, the connecting board 130 can be set on the back of the chassis 110. Both the connecting board 130 and the functional board 120 are provided with connecting terminals. The connecting terminals of each functional board 120 are connected to the connecting terminals on the connecting board 130, so that the functional boards 120 can communicate with each other through the data lines inside the connecting board 130. The type of data line inside the connecting board 130 is also not unique. In one embodiment, the data line of the connecting board 130 includes at least one of a CAN bus, a 100M network cable, a SERDES line, an LVDS differential line, and a single-ended signal line. The specific data line type can be selected according to the data size and real-time requirements. In this embodiment, the specific type of data line in the connecting board 130 can be selected according to the data transmission needs to facilitate data transmission.

[0054] The above-mentioned energy storage valve centralized control device sets the functional board 120, including the board for sending and receiving data with the battery management unit in the battery module and the board for sending and receiving data with the power module, in the chassis 110. The functional boards 120 communicate with each other through the data line connecting the board 130, realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0055] In one embodiment, as shown in FIG2 , the functional board 120 further includes a main control board 123, which communicates with the communication expansion board and the driver board via a data line connected to the board 130. Specifically, the main control board 123 may be a main CPU (Central Processing Unit) board. The specific type of the main CPU board is not unique. In this embodiment, the main CPU board uses the ZYNQ-XC7Z020 series chip, which integrates two ARM cores and one programmable logic resource. The two ARM cores are divided into a management core and a DSP (Digital Signal Process) core according to their functions. The management core is used for the management and communication modeling functions of the energy storage valve centralized control device, including program loading and self-test management of each functional board 120, IEC61850 communication modeling and related services, device operation event management, fault recording management, etc. The DSP core is used to implement algorithmic functions, primarily including battery cluster SOX estimation and inter-panel SOX balancing control. Specifically, SOX estimation can include SOC (State of Charge), SOH (State of Health), and SOP (State of Power) estimation. Programmable logic resources are responsible for driving external interfaces, encoding and decoding communication protocols, and implementing high-real-time control and protection logic. These include external interface driving, including ADC drive control and drive control for sensors such as temperature and humidity; communication protocol encoding and decoding, including decoding of timing signals, IEC60044-8 protocol encoding and decoding, and IEC61850 protocol encoding and decoding; and high-real-time control and protection logic, including IGBT drive control and synchronous sampling and analysis of IGBT feedback signals. Furthermore, as shown in Figure 3, the main control board 123 is also connected to and communicates with the valve control system.

[0056] In this embodiment, the main control board 123 communicates with the communication expansion board and the driver board through the data line of the connection board 130, which can support internal data analysis and control of the energy storage valve centralized control device, further improving the integration of the energy storage valve centralized control device.

[0057] In one embodiment, upon receiving a fire alarm signal uploaded from the battery management unit, the fiber optic communication expansion board 121 converts the fire alarm signal into an electrical signal through optoelectronic conversion, which is then transmitted to the main control board 123 via the data line of the connection board 130. Specifically, the fiber optic communication expansion board 121 also receives the fire alarm signal from the battery management unit. The fire alarm signal utilizes optical pulse modulation, with a 100kHz, 50% duty cycle waveform defined as the idle signal and a 1MHz, 50% duty cycle waveform defined as the alarm signal. The fiber optic communication expansion board 121 converts the received optical signal into an electrical signal through optoelectronic conversion, which is then transmitted to the main control board 123 via the connection board 130 using LVDS technology. The main control board 123 then completes data decoding and subsequent processing. In this embodiment, the optical fiber communication expansion board 121 performs photoelectric conversion on the fire alarm signal uploaded by the battery management unit, and then sends the electrical signal to the main control board 123 via the data line of the connection board 130, thereby uploading the fire alarm information of the battery management unit for timely processing and improving the working safety of the battery module.

[0058] In one embodiment, the optical fiber driver board 122 receives the driving signal sent by the main control board 123 through the data line connecting the board 130, and performs delayed switching control on the switch tube in the power module according to the driving signal. Taking the switch tube as IGBT as an example, the IGBT driving logic of the optical fiber driver board 122 is provided with a dead zone protection function to prevent the upper and lower tubes of the half-bridge IGBT from being turned on at the same time. For example, the optical fiber driver board 122 needs to turn on the upper tube at time 0 and turn on the lower tube at time 1 according to the driving signal. In the control, the optical fiber driver board 122 first turns off the upper tube, delays the setting time length, and ensures that the upper tube is turned off in place and then turns on the lower tube. In this embodiment, the optical fiber driver board 122 performs delayed switching control on the switch tube in the power module according to the driving signal sent by the main control board 123, realizes the dead zone protection function of the power module, and improves the control reliability.

[0059] In one embodiment, the optical fiber driver board 122 is also used to receive the fault status information fed back by the power module, and send the fault status information to the main control board 123 via the data line connecting the board 130. The main control board 123 generates a corresponding fault identifier based on the fault status information and outputs it. Specifically, the fault identifier is used to identify different fault types. For example, it can be a code or other identification information. The main control board 123 has a distinguishing coding design for the different fault states fed back by the IGBT in the power module, so that the upper device can identify the specific fault type. For example, the main control board 123 can pre-save the correspondence between the fault status information and the fault identifier. After receiving the fault status information fed back by the power module, it generates a corresponding fault identifier and sends it to the upper computer. In this embodiment, the optical fiber driver board 122 sends the fault status information fed back by the power module to the main control board 123. The main control board 123 generates a corresponding fault identifier and outputs it to identify the specific fault type.

[0060] In one embodiment, as shown in Figures 2 and 3, the functional board 120 further includes a high-voltage acquisition board 124 connected to the power module. The high-voltage acquisition board 124 is used to sample the capacitor voltage in the power module and transmit the sampled voltage to the main control board 124 via a data line connected to the board 130. The high-voltage acquisition board 124 is used to sample and monitor the capacitor voltage in the power module. By providing the high-voltage acquisition board 124 within the energy storage valve centralized control device, the capacitor voltage of the power module can be sampled, allowing the main control board 123 to monitor the capacitor voltage of the power module.

[0061] Correspondingly, in one embodiment, the main control board 123 calculates a voltage mean value based on the received sampled voltages after removing the maximum and minimum values. Specifically, the main control board 123 receives multiple sampled voltage values ​​uploaded within a unit time, removes the maximum and minimum values, and calculates the mean value. The calculated voltage mean value can be used by the main control board 123 to perform protection control or other functions. In this embodiment, the main control board 123 calculates the voltage mean value after removing the maximum and minimum values, which can prevent protection failures caused by single-point data anomalies.

[0062] The specific structure of the high-voltage acquisition board 124 is not unique. In one embodiment, the high-voltage acquisition board 124 includes an operational amplifier circuit, an analog-to-digital conversion chip, and a digital isolator. The operational amplifier circuit connects the power amplifier module and the analog-to-digital conversion chip, while the digital isolator connects the analog-to-digital conversion chip and the connection board 130. The operational amplifier circuit, the analog-to-digital conversion chip, and the digital isolator constitute a sampling loop. To improve the reliability of the sampling loop, two analog-to-digital conversion chips can be designed for redundant sampling. The operational amplifier circuit performs operations such as voltage reduction and filtering on the capacitor voltage in the power amplifier module, generating a signal that the analog-to-digital conversion chip can process and then sending it to the analog-to-digital conversion chip. The analog-to-digital conversion chip performs analog-to-digital conversion on the received signal. The converted data passes through the digital isolator and is then sent to the connection board 130. It is then uploaded to the main control board 123 via the data line of the connection board 130, preventing damage to the main control board 123 caused by abnormal front-end signals. In this embodiment, an operational amplifier circuit and an analog-to-digital conversion chip are used to process and convert the high voltage of the capacitor of the power amplifier module, and the high voltage is transmitted to the connection board 130 through a digital isolator, thereby improving the voltage acquisition reliability of the high voltage acquisition board.

[0063] Furthermore, in one embodiment, the high-voltage acquisition board 124 also includes a monitoring circuit, which is connected to the operational amplifier circuit, the analog-to-digital conversion chip, and the connection board 130. When the monitoring circuit detects an abnormality in the operational amplifier circuit or the analog-to-digital conversion chip, it transmits an alarm signal to the main control board 123 via the data line connecting the connection board 130. Specifically, the monitoring circuit monitors the operating voltage of the operational amplifier circuit in the sampling loop, the operating voltage of the analog-to-digital conversion chip, and the reference voltage. If an abnormality occurs, it immediately reports an alarm event. For example, if it detects a voltage exceeding a preset upper limit or falling below a preset lower limit, it transmits an alarm signal to the main control board 123. In this embodiment, the monitoring circuit transmits an alarm signal to the main control board 123 when it detects an abnormality in the operational amplifier circuit or the analog-to-digital conversion chip, thereby ensuring the operational reliability of the high-voltage acquisition board 124.

[0064] In one embodiment, continuing to refer to Figures 2 and 3, the functional board 120 also includes a low-voltage acquisition board 125 connected to the environmental data acquisition device. The low-voltage acquisition board 125 receives the environmental data sent by the environmental data acquisition device, and sends the environmental data to the main control board 123 through the data line connecting the board 130. Among them, the environmental data acquisition device can be a temperature sensor, a humidity sensor, etc. The sampling of environmental data is achieved through the low-voltage acquisition board 125, and a physical interface for the temperature and humidity sensors is provided. The specific interface form includes but is not limited to interfaces such as I2C and RS485. In this embodiment, a low-voltage acquisition board 125 is set inside the energy storage valve control device to communicate with the environmental data acquisition device, so as to realize the monitoring and collection of environmental data of the energy storage valve control device.

[0065] In one embodiment, the functional board 120 further includes a high-side driver board 126 connected to a status indication device. The high-side driver board 126 receives a status indication instruction sent by the main control board 123 via a data line connected to the board 130, and controls the status indication device according to the status indication instruction. The status indication device may be an indicator light, a display screen, a speaker, or other device that can provide status indication. Taking the example of an indicator light as the status indication device, the main control board 123 may determine the high-voltage or low-voltage state based on the capacitor voltage detected by the high-voltage acquisition board 124, and then output a status indication instruction to light up an external indicator light to indicate that the energy storage valve control device is in a high-voltage or low-voltage state. In this embodiment, a high-side driver board 126 is provided inside the energy storage valve control device to connect to the status indication device, so as to facilitate corresponding status indication.

[0066] In one embodiment, the function board 120 further includes an input board 127 for receiving external switch signals, and / or a backup board 128. The input board 127 is used to monitor external switch signals and status alarm information. The input board 127 is provided within the energy storage valve centralized control device to facilitate the collection of external switch signals. The backup board 128 is provided within the energy storage valve centralized control device to facilitate functional expansion.

[0067] In one embodiment, the functional board 120 also includes a power board 129 for connecting to an external AC / DC power supply. The power board 129 is provided inside the energy storage valve centralized control device so as to access an external AC / DC power supply to power other functional boards. Furthermore, the number of power boards 129 is more than two, and each power board 129 is respectively connected to an independent power bus in the connection board 130. Specifically, taking the number of two power boards 129 as an example, a dual-channel power bus design is adopted in the connection board 130, and each power bus is powered by an independent power supply, and the buses remain independent. In this embodiment, a plurality of power boards 129 are respectively connected to the independent power buses in the connection board 130 so as to independently power other functional boards, thereby improving the power supply reliability.

[0068] Specifically, as shown in FIG4 , each functional board 120 is connected via different data lines of the connecting board 130. For example, the optical fiber communication expansion board 121 is connected to the main control board 123 via the SBMU (Slave Battery Management Unit) data bus in the connecting board 130, obtains data sent by the battery management unit, and uploads it to the main control board 123. The main control board 123 is connected to the optical fiber driver board 122 via the corresponding data lines of the connecting board 130 to transmit IGBT drive instructions and status information. The high-voltage acquisition board 124 is connected to the main control board 123 via the corresponding data lines of the connecting board 130, and uploads high-voltage sampling signals to the main control board 123. The low-voltage acquisition board 125 is connected to the main control board 123 via the corresponding data lines of the connecting board 130, and uploads low-voltage sampling signals to the main control board 123. The main control board 123 is connected to the high-side driver board 126 via the corresponding data lines of the connecting board 130, and transmits the indicator light drive signal to the high-side driver board 126. The input board 127 is connected to the main control board 123 via the corresponding data lines of the connecting board 130, and uploads the input signal to the main control board 123. The power board 129 is connected to the fiber optic communication expansion board 121, the fiber optic driver board 122, the main control board 123, the high-voltage acquisition board 124, the low-voltage acquisition board 125, the high-side driver board 126, and the input board 127 via the power 5V bus in the connecting board 130, and supplies power to the corresponding functional boards.

[0069] Under the current technical background, the data exchange between the valve control system and the BMS system mainly relies on the low-speed communication interface between the power module control chassis and the battery cluster control chassis, which cannot meet the future development needs of flexible direct current energy storage technology. The above-mentioned energy storage valve centralized control device provided in this application integrates the power unit control and protection functions with the battery cluster control and protection functions. The technical effects that can be brought about are summarized as follows:

[0070] 1. Solve the data interaction bottleneck between the valve control system and the BMS system, bringing about improved product performance: Through integrated design, the data interaction mode of the two systems has undergone a complete change, from the original external communication to internal data sharing, which has greatly improved efficiency and removed obstacles to improving product performance.

[0071] 2. Reduced system costs: This proposal combines two devices into one, saving the cost of the chassis and its supporting hardware resources (such as the chassis housing and power modules), as well as the cost of communication components such as optical fibers and optical modules, effectively reducing the product cost of the energy storage valve unit. In higher voltage applications, as the number of energy storage valve units increases, the cost reduction advantage becomes more significant.

[0072] 3. Reduce system failure rate: The integrated design adopted in this proposal helps to reduce the number of system components and external interfaces, thereby reducing the probability of system failure caused by interference.

[0073] Taking a half-bridge energy storage valve unit as an example, existing technology uses separate control chassis for the power module and battery module, connected via low-speed communication technology. However, a centralized design combines these two control chassis into a single energy storage valve control chassis, enabling efficient data sharing and functional reuse. This not only resolves the bottleneck in underlying communication between the valve control system and the BMS, but also improves system integration and streamlines the system hierarchy.

[0074] In one embodiment, a method for controlling an energy storage valve is provided, comprising:

[0075] The data sent by the battery management unit in the battery module is received through the data line of the connecting board; the data is obtained by the board in the functional board that sends and receives data with the battery management unit and is transmitted to the data line of the connecting board.

[0076] The drive signal is sent to the board in the functional board that sends and receives data with the power module through the data line of the connecting board; the drive signal is used to control the power module; and the functional boards communicate with each other through the data line of the connecting board.

[0077] The functional boards include a main control board, a communication expansion board, and a driver board. The main control board communicates with the communication expansion board and driver board via data lines connecting the boards. The communication expansion board is used to transmit and receive data with the battery management unit in the battery module, and the driver board is used to transmit and receive data with the power module. After receiving data from the battery management unit, the main control board can generate a drive signal based on the received data and send it to the driver board. The driver board then sends the drive signal to the power module to control the power module. The main control board can also generate drive signals based on other received instructions to control the power module.

[0078] In one embodiment, the method further includes: receiving fault status information of the power module via a data line connected to the board, generating and outputting a corresponding fault identifier according to the fault status information.

[0079] In one embodiment, the method further includes: receiving a sampled voltage obtained by sampling a capacitor voltage in the power module through a data line connected to the board.

[0080] In one embodiment, the method further includes: calculating a voltage average after removing a maximum value and a minimum value from the received sampled voltage.

[0081] In one embodiment, the method further includes: receiving environmental data uploaded by the low-voltage acquisition board through a data line connecting the board.

[0082] In one embodiment, the method further includes: sending a status indication instruction to the high-side driver board via a data line connected to the board, where the status indication instruction is used to control the status indication device.

[0083] It should be noted that the specific steps of the above-mentioned energy storage valve control method are described in detail in the above-mentioned energy storage valve centralized control device, and will not be repeated here.

[0084] The above-mentioned energy storage valve control method enables communication between functional boards, including the board used to transmit and receive data with the battery management unit in the battery module and the board used to transmit and receive data with the power module, through the data lines connecting the boards, thereby realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0085] In one embodiment, an energy storage system is further provided, including a power module, a battery module and the above-mentioned energy storage valve centralized control device, where the energy storage valve centralized control device is connected to the power module and the battery module.

[0086] The above-mentioned energy storage system sets functional boards, including boards for sending and receiving data with the battery management unit in the battery module and cards for sending and receiving data with the power module, in the chassis. The functional boards communicate with each other through data cables connecting the boards, realizing internal data sharing and improving the efficiency of energy storage information interaction.

[0087] In one embodiment, the energy storage system further includes an environmental data acquisition device and a status indication device connected to the energy storage valve centralized control device. The energy storage valve centralized control device is connected to the environmental data acquisition device and the status indication device to collect environmental data and provide corresponding status indications.

[0088] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A centralized control device for energy storage valves, characterized in that: It includes a chassis, and functional boards and connection boards arranged in the chassis. The functional boards communicate with each other through the data lines of the connection boards. The functional boards include boards for sending and receiving data with the battery management unit in the battery module, and boards for sending and receiving data with the power module.

2. The energy storage valve centralized control device according to claim 1, characterized in that: The functional board includes a main control board, a communication expansion board and a driver board, and the main control board communicates with the communication expansion board and the driver board via the data line of the connecting board; The communication expansion board is used to transmit and receive data with the battery management unit in the battery module, and the drive board is used to transmit and receive data with the power module.

3. The energy storage valve centralized control device according to claim 2, characterized in that: The communication expansion board is a fiber optic communication expansion board, and / or the driver board is a fiber optic driver board.

4. The energy storage valve centralized control device according to claim 3, characterized in that: When the optical fiber communication expansion board receives the fire alarm signal uploaded by the battery management unit, it converts the fire alarm signal into an electrical signal through photoelectric conversion, and sends the electrical signal to the main control board via the data line of the connection board.

5. The energy storage valve centralized control device according to claim 3, characterized in that: The optical fiber driving board receives the driving signal sent by the main control board through the data line of the connecting board, and performs delayed switching control on the switch tube in the power module according to the driving signal.

6. The energy storage valve centralized control device according to claim 5, characterized in that: The optical fiber driver board is also used to receive fault status information fed back by the power module, and send the fault status information to the main control board through the data line of the connection board. The main control board generates a corresponding fault identifier according to the fault status information and outputs it.

7. The energy storage valve centralized control device according to claim 2, characterized in that: The functional board also includes a high-voltage acquisition board connected to the power module, and the high-voltage acquisition board is used to sample the capacitor voltage in the power module and send the obtained sampled voltage to the main control board through the data line of the connection board.

8. The energy storage valve centralized control device according to claim 7, characterized in that: The main control board calculates the voltage mean value after removing the maximum value and the minimum value from the received sampled voltage.

9. The energy storage valve centralized control device according to claim 7, characterized in that: The high-voltage acquisition board includes an operational amplifier circuit, an analog-to-digital conversion chip, and a digital isolator. The operational amplifier circuit connects the power amplifier module and the analog-to-digital conversion chip, and the digital isolator connects the analog-to-digital conversion signal and the connection board.

10. The energy storage valve centralized control device according to claim 9, characterized in that: The high-voltage acquisition board also includes a monitoring circuit, which is connected to the operational amplifier circuit, the analog-to-digital conversion chip and the connection board. When the monitoring circuit detects that the operational amplifier circuit or the analog-to-digital conversion chip is abnormal, the monitoring circuit sends an alarm signal to the main control board through the data line of the connection board.

11. The energy storage valve centralized control device according to claim 2, characterized in that: The functional board also includes a low-voltage acquisition board connected to the environmental data acquisition device, the low-voltage acquisition board receives the environmental data sent by the environmental data acquisition device, and sends the environmental data to the main control board through the data line of the connecting board.

12. The energy storage valve centralized control device according to claim 2, characterized in that: The functional board also includes a high-side driver board connected to the status indication device. The high-side driver board receives the status indication instruction sent by the main control board through the data line of the connecting board and controls the status indication device according to the status indication instruction.

13. The energy storage valve centralized control device according to claim 1, characterized in that: The function board card further includes an input board card for receiving an external switch signal, and / or the function board card further includes a spare board card.

14. The energy storage valve centralized control device according to claim 1, characterized in that: The functional board also includes a power board for connecting to an external AC / DC power supply.

15. The energy storage valve centralized control device according to claim 14, characterized in that: The number of the power supply boards is more than two, and each power supply board is connected to an independent power bus in the connection board respectively.

16. The energy storage valve centralized control device according to claim 1, characterized in that: It also includes a board guide rail and a buckle arranged in the chassis, and the functional board is arranged in the chassis through the board guide rail and fixed with the buckle.

17. The energy storage valve centralized control device according to any one of claims 1 to 16, characterized in that: The data line connecting the board includes at least one of a CAN bus, a 100M network cable, a SERDES line, a LVDS differential line and a single-ended signal line.

18. The energy storage valve centralized control device according to any one of claims 1 to 16, characterized in that: The chassis is a metal shell and is designed to be at the same potential as the power module.

19. A method for controlling an energy storage valve, characterized in that: include: Receive data sent by the battery management unit in the battery module through the data line connected to the board; The data is obtained by a board in the functional board that transmits and receives data with the battery management unit, and is transmitted to the data line of the connecting board; Sending a drive signal to a board in the functional board that transmits and receives data with the power module via a data line connected to the board; the drive signal is used to control the power module; The functional boards communicate with each other via the data lines connecting the boards.

20. An energy storage system, characterized in that: It comprises a power module, a battery module and the energy storage valve centralized control device according to any one of claims 1 to 18, wherein the energy storage valve centralized control device is connected to the power module and the battery module.

21. The energy storage system according to claim 20, characterized in that: It also includes an environmental data acquisition device and a status indication device connected to the energy storage valve centralized control device.

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