A light energy storage integrated control cabinet

Abstract

This utility model discloses an integrated photovoltaic energy storage control cabinet, including an EMS unit, a main BMS unit, a coordination controller, several PCS units, and a DC-DC unit. The EMS unit is equipped with multiple Ethernet ports for communication with internal and external devices. The main BMS unit has an upstream Ethernet port that communicates with the EMS unit, and a downstream Ethernet port that is extended via an Ethernet switch to communicate with the BMS HMI and lower-level battery cabinets. Its CAN bus interface communicates with the coordination controller. The coordination controller has an upstream Ethernet port that communicates with the EMS unit, and a downstream Ethernet port that is extended via an Ethernet switch to communicate with each PCS unit. Its 485 interface communicates with the PCS HMI and each DC-DC unit. This utility model constructs a three-level TCP communication system, vertically realizing photovoltaic TCP communication with upstream customers, horizontally realizing EMS Ethernet communication between the mains power supply and the user side, and horizontally realizing parallel communication within the integrated control cabinet and communication with lower-level battery cabinets.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery energy storage technology, and in particular to an integrated control cabinet for photovoltaic energy storage. Background Technology

[0002] Our industrial and commercial energy storage system solutions utilize industry-leading system integration technology and modular system configuration to achieve peak shaving and valley filling, providing customers with a stable and reliable power supply environment, reducing energy expenditures, and effectively helping customers achieve their energy sustainability goals.

[0003] The integrated photovoltaic energy storage control cabinet integrates a bidirectional converter (PCS), DC-DC unit, UPS, central control box, A-BMS box, power distribution system, lighting system, etc., and has the ability to adapt to high-voltage systems. It can operate stably in harsh power quality environments. The whole system adopts an intelligent thermal management system, which significantly improves cycle life and energy density while reducing the equipment footprint. The system is also equipped with DC / DC photovoltaic modules, supports multiple units in parallel, and can detect the generation voltage of the photovoltaic panels in real time, enabling the system to charge the battery at maximum power output and increase the system's power generation. It is suitable for more scenarios, such as peak shaving and valley filling, demand regulation, virtual capacity expansion, and photovoltaic consumption and other complex regulation scenarios. Utility Model Content

[0004] This utility model aims to provide an integrated photovoltaic energy storage control cabinet, realizing a more comprehensive industrial and commercial energy storage system solution. The technical solution is as follows: A photovoltaic energy storage integrated control cabinet includes: an EMS unit, a main BMS unit, a coordination controller, several PCS units, and several DC-DC units; The EMS unit is equipped with multiple Ethernet ports for communication connections with internal device units and external devices; The main BMS unit is equipped with an uplink network port, a downlink network port, and a CAN bus interface. Its uplink network port is connected to the EMS unit for communication, and its downlink network port is extended through an Ethernet switch to communicate with the BMS human-machine interface and the lower-level battery cabinet. Its CAN bus interface is connected to the coordination controller for communication. The coordination controller is equipped with an uplink network port, a downlink network port, a CAN bus interface, and a 485 bus interface. Its uplink network port is connected to the EMS unit for communication; its downlink network port is extended through an Ethernet switch to connect to each PCS for communication; its CAN bus interface is connected to the main BMS unit for communication; and its 485 interface is connected to the PCS human-machine interface and each DC-DC unit for communication.

[0005] Furthermore, the integrated photovoltaic energy storage control cabinet is divided into a left and right equipment compartment and a control compartment; the equipment compartment is internally partitioned for installing DC-DC units and PCS units; the control compartment is internally partitioned for installing a main BMS unit, a coordination controller, and communication equipment, including routers and Ethernet switches.

[0006] Furthermore, the equipment compartment is provided with four DC-DC unit slots and four PCS unit slots placed side by side; The DC-DC unit slots are arranged in two rows and two columns, with the DC-DC units placed vertically; The PCS unit slots are arranged in four rows and one column, and the PCS units are placed horizontally.

[0007] Furthermore, the equipment compartment is also equipped with a DC surge protection module, an AC surge protection module, a circuit breaker, and a PE busbar.

[0008] Furthermore, the control cabin is also equipped with a UPS power supply and a UPS battery pack.

[0009] Furthermore, the PCS human-machine interface is installed inside the equipment compartment; the BMS human-machine interface is located on the cabinet door of the integrated photovoltaic energy storage control cabinet.

[0010] Furthermore, the EMS unit includes at least four Ethernet ports: one for connecting to the Internet, one for connecting to internal devices, one for connecting to manageable user-side photovoltaic equipment, and one for connecting to the user-side EMS.

[0011] Furthermore, the EMS unit accesses the Internet via a mobile communication device.

[0012] Furthermore, the coordination controller includes at least two 485 bus interfaces, one for communication with the PCS human-machine interface and the other for communication with each PCS unit.

[0013] Compared with the prior art, the significant features of this utility model are: This utility model constructs a three-level TCP communication system, which vertically realizes photovoltaic TCP communication with upstream customers, horizontally realizes EMS Ethernet communication between the mains power side and the user side, and horizontally realizes parallel communication within the integrated control cabinet and communication with downstream battery cabinets. Attached Figure Description

[0014] Figure 1 This is an internal space layout diagram of the integrated photovoltaic energy storage control cabinet of this utility model; Figure 2 This is the electrical connection diagram of the integrated photovoltaic energy storage control cabinet of this utility model; Figure 3This is a communication connection diagram of the integrated photovoltaic energy storage control cabinet of this utility model. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1 like Figure 1 and Figure 2 As shown in the figure, this embodiment provides an integrated control cabinet for photovoltaic energy storage (comprehensive control cabinet). The cabinet body 3 of the comprehensive control cabinet is vertically divided into two partitions: equipment compartment 1 and control compartment 2. In the equipment compartment 1, there are several DC-DC unit slots 11, several PCS unit slots 12, a circuit breaker installation slot 15, a surge protector installation slot 13, a PE (protective ground) wiring slot 16, and a PCS human-machine interface (PCS-HMI) slot 14. It can accommodate up to 4 DC-DC units, 4 PCS units, several circuit breaker units, and a PE wiring busbar.

[0018] Specifically, the upper part of the equipment compartment is divided into four DC-DC unit slots 11 and four PCS unit slots 12; the DC-DC unit slots 11 and PCS unit slots 12 are placed side by side.

[0019] In terms of electrical connections, four PCS units are connected in parallel, with their outputs connected to the DC bus; four DCDC units are connected in parallel, with their inputs connected to the DC bus.

[0020] Structurally, the four DC-DC unit slots 11 are arranged in two rows and two columns, with the DC-DC units placed vertically for easy heat dissipation; the four PCS unit slots 12 are arranged in four rows and one column, stacked together, with the PCS units placed horizontally. This structure has a reasonable slot distribution, facilitating electrical connections and heat dissipation for each unit.

[0021] In this embodiment, the lower half of the equipment compartment 1 houses protective devices such as AC surge protectors, DC surge protectors, branch circuit breakers, main circuit breakers, and PE (protective ground) busbars; surge protectors, circuit breakers, and other equipment are quickly installed using industrial standard guide rails.

[0022] Inside the control compartment are installed equipment such as ABMS unit 23, coordination controller (central control unit) 24, router / Ethernet switch 25, etc., which provide power supply to the equipment in control compartment 2 through equipment such as UPS power supply 21, UPS battery pack 22, DC circuit breaker 26.

[0023] The integrated control cabinet also includes a BMS human-machine interface, which is installed on the cabinet door to facilitate on-site management of the integrated control cabinet.

[0024] The communication system of this device is as follows: Figure 3 As shown.

[0025] The external Internet accesses the energy management system (PR-EMS) via a 4G router. The PR-EMS is responsible for information collection and monitoring within the entire energy storage system, providing a comprehensive understanding of the system's operation and ensuring system safety.

[0026] In this embodiment, the PRE-EMS is equipped with four Ethernet ports ET0...ET4. Wherein: The Ethernet port ET0 allows for convenient and fast internet access via mobile communication through a 4G router.

[0027] Ethernet port ET1 is expanded via an Ethernet switch to establish a communication connection with the main BMS unit (ABMS) and the coordination controller. It exchanges data with the ABMS and the coordination controller using TCP.

[0028] Ethernet ports ET2 and ET3 are used for expansion, such as connecting to external devices like photovoltaic equipment of upstream customers via Ethernet switches, or connecting to the EMS unit on the user side (user-EMS) to establish cluster management capabilities.

[0029] The ABMS is equipped with an uplink network port (Port A), a downlink network port (Port B), and at least one CAN bus interface. The uplink network port establishes a communication connection with the PRE-EMS using the TCP protocol. The downlink network port establishes a communication connection with the BMS HMI (ABMS-HMI) and the downstream battery cabinet's BMS (CBMS) through an Ethernet switch. The CAN bus interface establishes a communication connection with the coordination controller via the CAN bus for rapid data exchange.

[0030] The coordinating controller is equipped with an uplink network port, a downlink network port, at least one CAN bus interface, and at least two RS-485 bus interfaces. Its CAN bus interface connects to the ABMS via the CAN bus for fast data exchange; its downlink network port establishes communication connections with each PCS unit through an Ethernet switch; one of its RS-485 bus interfaces communicates with the PCS Human-Machine Interface (PCS-HMI), and its other RS-485 bus interface communicates with each DC-DC unit via the RS-485 bus. The PCS-HMI provides field management functions, enabling on-site monitoring of the operating status of each PCS unit and each DC-DC unit.

[0031] The DC-DC units communicate in parallel via RS485. Specifically, the MODBUS-RTU protocol is used to upload the status of all DC-DC units and coordinate the control of the controller.

[0032] In this embodiment, a three-level TCP communication system is constructed, which vertically realizes photovoltaic TCP communication with upstream customers, horizontally realizes EMS Ethernet communication between the mains power side and the user side, and horizontally realizes parallel communication within the integrated control cabinet and communication with lower-level battery cabinets.

[0033] The integrated photovoltaic energy storage control cabinet in this embodiment has the following advantages: 1. Intelligent and efficient It features interfaces for optical, energy storage, and power distribution modules, supports 110% three-phase unbalanced output, supports 4-channel MPPT (maximum power point tracking) access, and supports external 10-channel battery cabinets; it can connect to devices accessing the 4G network via computer or mobile APP to view real-time / historical parameters and fault information, and control the start and stop of the device; it has second-level switching and automatic on / off network operation modes, and features intelligent functions and a user-friendly operating interface.

[0034] 2. Flexible layout, modular design A single PCS unit has a power output of 125kW, and up to four units can be connected in parallel for a total power output of 500kW. A single DC-DC unit has a power output of 50kW, and up to four units can be connected in parallel for a total power output of 200kW. Up to 25 different photovoltaic and energy storage configuration schemes can be implemented.

[0035] 3. Safe and reliable It features protection against reverse connection of photovoltaic cell input, leakage current, over / under voltage, overcurrent, short circuit, overload, grounding, islanding, three-phase imbalance, insulation impedance, surge, and overtemperature; the battery management system provides comprehensive protection for battery health.

[0036] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A light and energy storage integrated control cabinet, characterized in that: include: EMS unit, main BMS unit, coordination controller, several PCS units and several DC-DC units; The EMS unit is equipped with multiple Ethernet ports for communication connections with internal device units and external devices; The main BMS unit is equipped with an uplink network port, a downlink network port, and a CAN bus interface. Its uplink network port is connected to the EMS unit for communication, and its downlink network port is extended through an Ethernet switch to communicate with the BMS human-machine interface and the lower-level battery cabinet. Its CAN bus interface is connected to the coordination controller for communication. The coordination controller is equipped with an uplink network port, a downlink network port, a CAN bus interface, and a 485 bus interface. Its uplink network port is connected to the EMS unit for communication; its downlink network port is extended through an Ethernet switch to communicate with each PCS; and its CAN bus interface is connected to the main BMS unit for communication. Its 485 interface is connected to the PCS human-machine interface and various DC-DC units for communication.

2. The light and energy storage integrated control cabinet of claim 1, wherein: The integrated photovoltaic energy storage control cabinet is divided into a left and right equipment compartment and a control compartment. The equipment compartment is internally partitioned for installing DC-DC units and PCS units. The control compartment is internally partitioned for installing the main BMS unit, coordination controller, and communication equipment, including routers and Ethernet switches.

3. The integrated photovoltaic energy storage control cabinet as described in claim 2, characterized in that: The equipment compartment is equipped with four DC-DC unit slots and four PCS unit slots placed side by side; The DC-DC unit slots are arranged in two rows and two columns, with the DC-DC units placed vertically; The PCS unit slots are arranged in four rows and one column, and the PCS units are placed horizontally.

4. The integrated photovoltaic energy storage control cabinet as described in claim 2, characterized in that: The equipment compartment is also equipped with DC surge protection modules, AC surge protection modules, circuit breakers, and PE busbars.

5. The integrated photovoltaic energy storage control cabinet as described in claim 2, characterized in that: The control cabin is also equipped with a UPS power supply and a UPS battery pack.

6. The integrated photovoltaic energy storage control cabinet as described in claim 2, characterized in that: The PCS human-machine interface is installed inside the equipment compartment; the BMS human-machine interface is located on the cabinet door of the integrated photovoltaic energy storage control cabinet.

7. The integrated photovoltaic energy storage control cabinet as described in claim 1, characterized in that: The EMS unit includes at least four Ethernet ports: one for connecting to the Internet, one for connecting to internal devices, one for connecting to manageable user-side photovoltaic equipment, and one for connecting to the user-side EMS.

8. The integrated photovoltaic energy storage control cabinet as described in claim 1, characterized in that: The EMS unit accesses the Internet via a mobile communication device.

9. The integrated photovoltaic energy storage control cabinet as described in claim 1, characterized in that: The coordination controller includes at least two 485 bus interfaces, one for communication with the PCS human-machine interface and the other for communication with each PCS unit.

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