Grid-connected energy storage container integrating battery direct current bus bar and MPPT (Maximum Power Point Tracking)

Abstract

The utility model discloses a grid-connected energy storage container integrating a battery direct current confluence busbar and MPPT (Maximum Power Point Tracking). The box body is internally divided into a left half cavity and a right half cavity; a plurality of molded case circuit breakers are arranged in a first bin body of the left half cavity, a plurality of MPPT controllers are arranged in a second bin body, an EMS main control board is arranged in a third bin body, a 4GDTU terminal and a switch are arranged in a fourth bin body, and an optical fiber welding box is arranged in a fifth bin body; the right half cavity is internally divided into an upper bin body and a lower bin body; a switching power supply, a UPS host, a circuit breaker module consisting of a plurality of miniature circuit breakers, and an intermediate relay are arranged in the upper bin body; the lower bin body is internally provided with a direct-current busbar, an isolating switch and two rapid fuses; the direct-current busbar is provided with a direct-current busbar positive electrode and a direct-current busbar negative electrode; the box door is provided with a touch screen and a BMS management system. According to the utility model, the battery direct current busbar related part and the MPPT controller part are combined in one cabinet, so that the internal space of the container is greatly saved.

Description

Technical Field

[0001] The utility model relates to a grid-connected energy storage container integrating a battery DC busbar and an MPPT. Background Art

[0002] Existing industrial and commercial energy storage containers generally house the battery DC busbar related parts, MPPT controller parts, and battery BMS control parts in cabinets, or install the MPPT controller separately on the photovoltaic panel. This solution requires the use of two or more cabinets, which will cause space waste and inconvenient operation. The communication between the two will be connected by various cables, which will increase the complexity of the system. In particular, after the communication cables are connected, the lines are chaotic and the possibility of interference between modules is greatly increased, which may cause communication interference and greatly reduce the stability of the system. After the two are separately housed, corresponding heat dissipation devices will be designed to protect the components in the cabinet from heat dissipation, causing protrusions or enlargement in some parts of the cabinet, increasing the complexity and increasing the noise of the heat dissipation devices of the entire system. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a grid-connected energy storage container integrating a battery DC busbar and an MPPT, which combines the battery DC busbar related parts and the MPPT controller part in one cabinet, greatly saving the internal space of the container.

[0004] The purpose of the utility model is achieved through the following technical solutions: a grid-connected energy storage container integrating a battery DC busbar and MPPT, comprising a box body and a box door; the box body is divided into a left half chamber and a right half chamber; the left half chamber is divided into five compartments, from bottom to top, the first compartment body to the fifth compartment body; the first compartment body is provided with a plurality of molded case circuit breakers, the second compartment body is provided with a plurality of MPPT controllers, the third compartment body is provided with an EMS main control board, the fourth compartment body is provided with a 4GDTU terminal and a switch, and the fifth compartment body is provided with an optical fiber fusion box; the right half chamber is divided into an upper and lower compartment body, the upper compartment body is provided with a switching power supply, a UPS host, a circuit breaker module composed of a plurality of miniature circuit breakers, and an intermediate relay; the lower compartment body is provided with a DC busbar, an isolating switch and two fast fuses, and the DC busbar is provided with a DC busbar positive pole and a DC busbar negative pole; the box door is provided with a touch screen and a BMS management system;

[0005] Each MPPT controller is connected to an external photovoltaic device, and a molded case circuit breaker is provided between each MPPT controller and the photovoltaic device; the power output end of the MPPT controller is respectively connected to the positive pole of the DC bus and the negative pole of the DC bus, and the external battery cluster and PCS are connected through the positive pole of the DC bus and the negative pole of the DC bus; the isolating switch is set between the DC bus and the PCS, and two fast fuses are connected in series between the PCS and the isolating switch;

[0006] The UPS host is connected to the AC220V power supply through a miniature circuit breaker. The UPS host is connected to the switching power supply. The power output end of the switching power supply is connected to the EMS main control board, BMS management system, touch screen, and switch respectively; the EMS main control board is connected to the 4GDTU terminal, BMS management system, touch screen, switch, and MPPT controller respectively, and the switch is connected to the optical fiber fusion box.

[0007] The EMS main control board communicates with the MPPT controller, BMS management system, and switch via the MOBUS RTU protocol.

[0008] A plurality of connection terminals are arranged between the circuit breaker module and the intermediate relay and in the compartment below the circuit breaker module and the intermediate relay. The connection terminals are all connected to the EMS main control board and are reserved external interfaces.

[0009] The beneficial effects of the utility model are as follows: the utility model combines the battery DC bus related parts and the MPPT controller part into one cabinet, which greatly saves the internal space of the container and provides a flexible choice direction for expanding the battery capacity of the entire system; the communication cable will directly enter the EMS main control board, without the need for complex wiring and threading work, reducing the complexity of the system and greatly improving the stability of the system; the original two systems are combined into one system, and the two heat dissipation systems required by the two systems can be simplified into one heat dissipation system, which can reduce the volume of the related heat dissipation system and reduce the noise caused by heat dissipation. It can also reduce the power loss due to line extension, improve the efficiency of MPPT operation, and indirectly improve the operating efficiency and stability of the entire photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the box structure of the grid-connected energy storage container of the utility model;

[0011] Figure 2 This is a schematic diagram of the door structure of the grid-connected energy storage container of the utility model;

[0012] Figure 3 This is a circuit connection diagram of the grid-connected energy storage container of the utility model;

[0013] Explanation of the accompanying drawings: 1-molded case circuit breaker, 2-MPPT controller, 3-EMS main control board, 4-4GDTU terminal, 5-switch, 6-optical fiber fusion box, 7-switching power supply, 8-UPS host, 9-circuit breaker module, 10, 12, 13, 14, 15-terminal blocks, 11-intermediate relay, 16-positive pole of DC bus, 17-negative pole of DC bus, 18-isolating switch, 19-fast fuse, 20-touch screen, 21-BMS management system. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings.

[0015] like Figure 1 and Figure 2 As shown, a grid-connected energy storage container with integrated battery DC busbar and MPPT of the utility model comprises a box body and a box door; the box body is divided into a left half chamber and a right half chamber; the left half chamber is divided into five compartments, which are the first compartment to the fifth compartment from bottom to top; a plurality of molded case circuit breakers 1 are arranged in the first compartment, a plurality of MPPT controllers 2 are arranged in the second compartment, and three MPPT1 controllers and three molded case circuit breakers Q1-Q3 are arranged in this embodiment, an EMS main control board 3 is arranged in the third compartment, a 4GDTU terminal 4 and a switch 5 are arranged in the fourth compartment, and an optical fiber fusion box 6 is arranged in the fifth compartment; the right half chamber is divided into two upper and lower compartments, and a switching power supply 7, a UPS host 8, a circuit breaker module 9 composed of a plurality of miniature circuit breakers, and an intermediate relay 11 are arranged in the upper compartment; a DC bus, an isolating switch 18 and two fast fuses 19 are arranged in the lower compartment, and a DC bus positive pole 16 and a DC bus negative pole 17 are arranged on the DC bus; a touch screen 20 and a BMS management system 21 are arranged on the box door;

[0016] like Figure 3 As shown, each MPPT controller 2 is externally connected to a photovoltaic device, and a molded case circuit breaker 1 is provided between each MPPT controller and the photovoltaic device; the power output end of the MPPT controller is respectively connected to the DC bus positive pole 16 and the DC bus negative pole 17, and the external battery cluster and PCS are connected through the DC bus positive pole 16 and the DC bus negative pole 17; the isolating switch 18 is arranged between the DC bus and the PCS, and two fast fuses 19 (F1, F2) are connected in series between the PCS and the isolating switch 18 (Q4); the isolating switch adopts an isolating switch with shunt + 3 groups of auxiliary contacts, and the shunt represents that the external applied voltage can be used for tripping, and tripping means power off; when the auxiliary contact is disconnected or closed, there is a contact that follows the change, that is, a dry contact, which can be connected and then connected to the EMS main control board to judge the state of the isolating switch, whether it is closed or disconnected.

[0017] The UPS host 8 is connected to the AC220V power supply through a miniature circuit breaker Q6, the UPS host is connected to the switching power supply 7, and the power output end of the switching power supply is respectively connected to the EMS main control board, the BMS management system 21, the touch screen 20, and the switch 5; the EMS main control board 3 is respectively connected to the 4GDTU terminal 4, the BMS management system 21, the touch screen 20, the switch 5, and the MPPT controller 2, and the switch 5 is connected to the optical fiber fusion box 6.

[0018] The EMS main control board 3 communicates with the MPPT controller 2 , the BMS management system 21 , and the switch 5 via the MOBUS RTU protocol.

[0019] A plurality of connection terminals are arranged between the circuit breaker module 9 and the intermediate relay 11 and in the compartment below the circuit breaker module 9 and the intermediate relay 11. The connection terminals are all connected to the EMS main control board 3 and are reserved external interfaces.

[0020] In this embodiment, two intermediate relays are provided, which are respectively denoted as K1.1 and K1.2. Both intermediate relays are connected to the EMS main board. The EMS main control board is connected to external fire-fighting equipment, water cooling equipment, etc. through the intermediate relays.

[0021] The external battery cluster and PCS are connected to the BMS management system. The PCS is also connected to the EMS main control board. The BMS management system is connected to the battery cluster via the CAN bus and to the PCS via the RS485 bus. The EMS main control board exchanges information with the PCS via the MOBUS RTU protocol.

[0022] The circuit breaker module 9 is provided with a plurality of miniature circuit breakers, which are used as power switches between the power supply and the load equipment. One of the miniature circuit breakers Q5 is used to connect between the AC220V power supply and other external equipment (such as the air conditioner host, thermostat, electric fan, electric blinds, etc.) to control the power on and off of the external equipment; these external equipment are all controlled by the EMS main control board and communicate with the EMS main control board through the RS485 protocol.

[0023] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspirations disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A grid-connected energy storage container integrating a battery DC busbar and MPPT, characterized in that: The invention comprises a box body and a box door; the box body is divided into a left half chamber and a right half chamber; the left half chamber is divided into five chambers, which are the first chamber to the fifth chamber from bottom to top; the first chamber is provided with a plurality of molded case circuit breakers (1), the second chamber is provided with a plurality of MPPT controllers (2), the third chamber is provided with an EMS main control board (3), the fourth chamber is provided with a 4GDTU terminal (4) and a switch (5), and the fifth chamber is provided with an optical fiber fusion box (6); the right half chamber is divided into an upper and lower chamber, the upper chamber is provided with a switching power supply (7), a UPS host (8), a circuit breaker module (9) composed of a plurality of miniature circuit breakers, and an intermediate relay (11); the lower chamber is provided with a DC bus, an isolating switch (18) and two fast fuses (19), and the DC bus is provided with a DC bus positive pole (16) and a DC bus negative pole (17); the box door is provided with a touch screen (20) and a BMS management system (21); Each MPPT controller (2) is externally connected to a photovoltaic device, and a molded case circuit breaker (1) is provided between each MPPT controller and the photovoltaic device; the power output end of the MPPT controller is respectively connected to the DC bus positive pole (16) and the DC bus negative pole (17), and the external battery cluster and PCS are connected through the DC bus positive pole (16) and the DC bus negative pole (17); the isolating switch (18) is provided between the DC bus and the PCS, and two fast fuses (19) are connected in series between the PCS and the isolating switch (18); The UPS host (8) is connected to an AC220V power supply via a miniature circuit breaker. The UPS host is connected to a switching power supply (7). The power output end of the switching power supply is respectively connected to an EMS main control board, a BMS management system (21), a touch screen (20), and a switch (5). The EMS main control board (3) is respectively connected to a 4GDTU terminal (4), a BMS management system (21), a touch screen (20), a switch (5), and an MPPT controller (2). The switch (5) is connected to a fiber optic splicing box (6).

2. A grid-connected energy storage container integrating a battery DC busbar and an MPPT according to claim 1, characterized in that: The EMS main control board (3) communicates with the MPPT controller (2), the BMS management system (21), and the switch (5) via the MOBUS RTU protocol.

3. The grid-connected energy storage container integrating a battery DC busbar and an MPPT according to claim 1, characterized in that: A plurality of connection terminals are provided between the circuit breaker module (9) and the intermediate relay (11) and in the compartment below the circuit breaker module (9) and the intermediate relay (11), and the connection terminals are all connected to the EMS main control board (3) and serve as reserved external interfaces.

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