Distributed energy storage system communication architecture

Abstract

The utility model discloses a distributed energy storage system communication architecture, which comprises data processing equipment and a plurality of energy storage cabinets, the energy storage cabinets are distributed in a square matrix, and different energy storage cabinets are respectively connected with the data processing equipment; the energy storage cabinet comprises a plurality of PCSs, each PCS at least comprises a control board and a BCS board, the control board is provided with an FPGA and a DSP, the BCS board is provided with a switch chip and an MCU, the switch chip is connected with the DSP, the MCU and an external network port of the PCS through the Ethernet, the FPGA is connected with the external network port of the PCS through the Ethernet, and the switch chip is connected with the external network port of the PCS through the Ethernet. External network ports of different PCSs are mutually connected and are connected with the data processing equipment, so that data exchange and information processing in the PCS and between different PCSs and different energy storage cabinets are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of distributed energy storage systems, and in particular to a distributed energy storage system communication architecture. Background Art

[0002] With the vigorous development of the new energy and energy storage industries, the solution to the internal and external communication problems of distributed energy storage products has become increasingly important. Because it involves data communication of multiple internal and external modules such as fire protection, battery data sampling, and signal synchronization, there are a large number of communication terminals connected to the external panel, messy lead wires, and complex types of lead communication terminals, which leads to cumbersome operations for on-site operators, high wiring error rate, and high technical requirements for on-site operators. These problems have brought huge challenges to the communication reliability and integrity of industrial equipment such as energy storage inverters.

[0003] Therefore, it is necessary to provide a distributed energy storage system communication architecture to solve the problems mentioned in the above background technology. Utility Model Content

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a distributed energy storage system communication architecture, including a data processing device and an energy storage cabinet, wherein a plurality of energy storage cabinets are arranged in a square array, and different energy storage cabinets are respectively connected to the data processing device for information processing between different energy storage cabinets;

[0005] The energy storage cabinet includes several PCSs, and the PCS includes at least a control board and a BCS board. The control board is provided with an FPGA and a DSP, and the BCS board is provided with a switch chip and an MCU. The switch chip is connected to the external network ports of the DSP, the MCU and the PCS respectively through Ethernet, and the FPGA is connected to the external network port of the PCS through Ethernet. The external network ports of different PCSs are respectively connected to each other and to the data processing device to realize data exchange and information processing within the PCS, between different PCSs and different energy storage cabinets.

[0006] As a preferred technical solution of the utility model, the PCS is provided with at least three external network ports;

[0007] Among them, the first external network port and the third external network port of one of the PCSs are connected to the data processing device respectively; the second external network ports of all the PCSs are parallel network ports, and the second external network ports of all the PCSs are connected one by one.

[0008] As a preferred technical solution of the present utility model, the first external network port and the second external network port are respectively connected to the switch chip via Ethernet signals, and the second external network port and the third external network port are respectively connected to the FPGA via Ethernet signals.

[0009] As a preferred technical solution of the present utility model, the output signal of the FPGA to the third external network port is a high-frequency synchronization signal.

[0010] As a preferred technical solution of the present utility model, the FPGA is also connected to the third external network port via RS485 communication.

[0011] As a preferred technical solution of the present utility model, the first external network port, the second external network port and the third external network port are all RJ45 network ports.

[0012] As a preferred technical solution of the present utility model, the DSP and the MCU are connected via SCI communication.

[0013] As a preferred technical solution of the present utility model, the PCS also includes a device connection module, which is connected to the control board and the BCS board respectively, and is used to connect energy storage energy block auxiliary equipment.

[0014] Compared with the prior art, the utility model provides a distributed energy storage system communication architecture, which has the following beneficial effects:

[0015] 1. It can optimize the system communication mode of distributed energy storage products, so that while ensuring the communication quality, the communication rate is faster and the system communication complexity is lower;

[0016] 2. It can reduce the number of communication terminals and leads on the panel;

[0017] 3. Achieve high consistency of communication terminal types;

[0018] 4. It is helpful for on-site operators to complete the wiring between devices simply and conveniently, reduce the wiring error rate, and thus better carry out product debugging and data monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a distributed energy storage system communication architecture;

[0020] In the figure: 1. Data processing equipment; 2. Energy storage cabinet; 3. PCS; 4. Control board; 5. BCS board; 6. FPGA; 7. DSP; 8. Switch chip; 9. MCU; 10. Equipment connection module. DETAILED DESCRIPTION

[0021] See also Figure 1 The utility model provides a distributed energy storage system communication architecture, including: a data processing device and an energy storage cabinet, wherein a plurality of energy storage cabinets are arranged in a square array, and different energy storage cabinets are respectively connected to the data processing device for information processing between different energy storage cabinets;

[0022] The energy storage cabinet includes several PCSs, and the PCS includes at least a control board and a BCS board. The control board is provided with an FPGA and a DSP, and the BCS board is provided with a switch chip and an MCU. The switch chip is connected to the external network ports of the DSP, the MCU and the PCS respectively through Ethernet, and the FPGA is connected to the external network port of the PCS through Ethernet. The external network ports of different PCSs are respectively connected to each other and to the data processing device to realize data exchange and information processing within the PCS, between different PCSs and different energy storage cabinets.

[0023] Specifically, an Ethernet communication system composed of switch chips is used to replace RS485 and CAN communications between PCSs inside the energy storage cabinet and between external distributed energy storage cabinets, so that while ensuring the communication quality, the communication rate is faster and the system communication complexity is lower.

[0024] Among them, the data processing device is the smart energy chain eLink, the energy storage cabinet is the smart energy block eBlock, the PCS is the energy storage inverter, the MCU is the microcontroller unit, the DSP is the digital signal processor, and the FPGA is a digital logic device.

[0025] In this embodiment, the PCS is provided with at least three external network ports;

[0026] Among them, the first external network port and the third external network port of one of the PCSs are connected to the data processing device respectively; the second external network ports of all the PCSs are parallel network ports, and the second external network ports of all the PCSs are connected one by one.

[0027] It should be explained that the first external network port and the second external network port are external network ports of the switch chip, and the 1, 2, 3, and 6 pins of the second external network port are connected to the PHY port output signal of the switch itself, and the 4, 5, 7, and 8 pins are connected to the Ethernet signal from the FPGA for data transmission. In other words, the external output signal of the switch chip and the Ethernet signal from the FPGA for data transmission are combined into one network port output according to the specified line sequence, thereby reducing the number of communication terminals and the number of external leads.

[0028] The MCU on the BSC board and the switch chip use a MAC-to-MAC RMII direct connection (an interface connecting the MAC layer and the PHY layer); the Ethernet signal of the DSP is connected to the PHY port of the switch chip using a single network transformer.

[0029] In this embodiment, the first external network port and the second external network port are respectively connected to the switch chip through Ethernet signals, and the second external network port and the third external network port are respectively connected to the FPGA through Ethernet signals.

[0030] In this embodiment, the output signal of the FPGA to the third external network port is a high-frequency synchronization signal.

[0031] In this embodiment, the FPGA is also connected to the third external network port via RS485 communication.

[0032] Specifically, the high-frequency synchronous RS485 signal is used as an alternative solution, and it will only start working when the high-frequency synchronous network signal becomes unstable or fails, ensuring the reliability of communication. Among them, the two high-frequency synchronous communications of RS485 signal and Ethernet signal are combined on one network port, so that the external terminals of PCS and distributed eBlock are all network ports, ensuring the consistency of communication terminal types.

[0033] In this embodiment, the first external network port, the second external network port, and the third external network port are all RJ45 network ports.

[0034] In this embodiment, the DSP and the MCU are connected via SCI communication.

[0035] Specifically, the SCI communication channel setting can realize data exchange between the digital signal processor DSP and the BCS board, while ensuring that the system has good compatibility and flexibility, so that new communication protocols or devices can be easily introduced in future system upgrades or modifications.

[0036] In this embodiment, the PCS further includes a device connection module, which is connected to the control board and the BCS board respectively, and is used to connect the energy storage energy block auxiliary equipment. The device connection module is a device connection interface, and the auxiliary equipment includes at least a water machine, a BMU, a fan, a fire protection, and a display.

[0037] The utility model uses the switch chip as a bridge and uses Ethernet communication to replace the RS485 and CAN communications between the original PCS's DSP, FPGA, and MCU. At the same time, it is connected to the distributed eBlock and PCS that process the entire array and the eLink of the equipment module, and a new network port is added to transmit high-frequency synchronization signals, thereby completing the communication between systems.

[0038] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distributed energy storage system communication architecture, characterized in that: include: A data processing device (1) and an energy storage cabinet (2), wherein a plurality of the energy storage cabinets (2) are arranged in a square array, and different energy storage cabinets (2) are respectively connected to the data processing device (1) for performing information processing between different energy storage cabinets (2); The energy storage cabinet (2) comprises a plurality of PCSs (3), wherein the PCSs (3) comprise at least a control board (4) and a BCS board (5), wherein the control board (4) is provided with an FPGA (6) and a DSP (7), wherein the BCS board (5) is provided with a switch chip (8) and an MCU (9), wherein the switch chip (8) is connected to the external network ports of the DSP (7), the MCU (9) and the PCS (3) respectively through Ethernet, wherein the FPGA (6) is connected to the external network port of the PCS (3) through Ethernet, wherein the external network ports of different PCSs (3) are respectively connected to each other and to the data processing device (1), so as to realize data exchange and information processing within the PCS (3), between different PCSs (3) and different energy storage cabinets (2).

2. A distributed energy storage system communication architecture according to claim 1, characterized in that: The PCS (3) is provided with at least three external network ports; The first external network port and the third external network port of one PCS (3) are respectively connected to the data processing device (1); the second external network ports of all the PCSs (3) are parallel network ports, and the second external network ports of all the PCSs (3) are respectively connected in a one-to-one correspondence.

3. A distributed energy storage system communication architecture according to claim 2, characterized in that: The first external network port and the second external network port are respectively connected to the switch chip (8) via Ethernet signals, and the second external network port and the third external network port are respectively connected to the FPGA (6) via Ethernet signals.

4. A distributed energy storage system communication architecture according to claim 3, characterized in that: The output signal of the FPGA (6) to the third external network port is a high-frequency synchronization signal.

5. A distributed energy storage system communication architecture according to claim 3, characterized in that: The FPGA (6) is also connected to the third external network port via RS485 communication.

6. A distributed energy storage system communication architecture according to claim 2, characterized in that: The first external network port, the second external network port and the third external network port are all RJ45 network ports.

7. A distributed energy storage system communication architecture according to claim 2, characterized in that: The DSP (7) and the MCU (9) are connected via SCI communication.

8. A distributed energy storage system communication architecture according to claim 1, characterized in that: The PCS (3) further comprises a device connection module (10), wherein the device connection module (10) is connected to the control board (4) and the BCS board (5) respectively, and the device connection module (10) is used to connect an energy storage energy block auxiliary device.

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