Energy storage system, energy storage cabinet and high-voltage distribution box thereof

Abstract

The utility model relates to the technical field of energy storage, particularly provides an energy storage system, an energy storage cabinet and a high-voltage distribution box thereof, and aims to at least solve one of the problems of low equipment integration level, large size and inconvenience in installation and maintenance of the conventional energy storage system. The high-voltage distribution box provided by the utility model comprises the components of a housing which is internally provided with an installation space; the installation space is divided into a high-voltage area and a low-voltage area by the wire duct, and a local controller is arranged in the low-voltage area. According to the high-voltage distribution box provided by the utility model, the installation convenience and maintenance convenience of equipment are improved, the size of the equipment is reduced, the miniaturization design of an energy storage cabinet is facilitated, modular production can be realized, and the failure rate and cost of the equipment can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and specifically provides an energy storage system, an energy storage cabinet and a high-voltage distribution box thereof. Background Art

[0002] In the field of energy storage technology, DC high-voltage boxes and AC distribution boxes are two important devices, providing DC high-voltage power supply and AC power distribution, respectively. These two devices typically require separate installation and maintenance, which not only increases the size and cost of the equipment but also complicates and increases maintenance. Furthermore, since these devices are typically custom-made, they are not suitable for modular production, which limits their flexibility and adaptability. Furthermore, since these independent devices require a large installation space, they hinder miniaturization. Finally, a large number of connecting cables and connectors are required between the devices, which increases the number of failure points and reduces reliability.

[0003] Accordingly, a new solution is needed in this field to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the above technical problems, that is, to solve at least one of the problems of the existing energy storage system, namely, low equipment integration, large size, and inconvenient installation and maintenance.

[0005] In a first aspect, the present invention provides a high-voltage distribution box, characterized in that the high-voltage distribution box comprises:

[0006] A housing having an internal structure with an installation space;

[0007] A wire trough, which separates the installation space into a high-voltage area and a low-voltage area,

[0008] Wherein, a local controller is provided in the low-voltage area.

[0009] In some feasible implementations of the above-mentioned high-voltage distribution box, the low-voltage area is further provided with a battery cluster management unit, and the battery cluster management unit and the local controller are stacked and installed along the height direction of the housing.

[0010] In some feasible implementations of the above-mentioned high-voltage distribution box, the battery cluster management unit and the local controller are arranged in a middle position of the installation space along the front-to-back direction.

[0011] In some feasible embodiments of the above-mentioned high-voltage distribution box, the low-voltage area is further provided with a switching power supply, and the switching power supply is vertically attached to the inner side of the shell; and / or

[0012] The front panel of the housing is also provided with a plurality of communication connectors connected to the local controller.

[0013] In some feasible implementations of the above-mentioned high-voltage distribution box, a plurality of grid connectors and a plurality of three-phase electrical connectors are further provided on the back panel of the housing.

[0014] In some feasible implementations of the above-mentioned high-voltage distribution box, an AC molded case circuit breaker is further connected to the line between the grid connector and the three-phase electrical connector.

[0015] In some feasible embodiments of the above-mentioned high-voltage distribution box, the high-voltage area includes a DC molded case circuit breaker, a fuse, a total positive contactor, a total negative contactor, and a Hall current sensor. The front panel of the shell is also provided with a battery positive connector, a battery negative connector, a power supply positive connector, and a power supply negative connector. The battery positive connector, the DC molded case circuit breaker, the fuse, the total positive contactor and the power supply positive connector are connected to form a positive circuit, and the battery negative connector, the Hall current sensor, the total negative contactor, the DC molded case circuit breaker and the power supply negative connector are connected to form a negative circuit.

[0016] In some feasible implementations of the above-mentioned high-voltage distribution box, the low-voltage area is further provided with a terminal block; and / or

[0017] The low-voltage zone is further provided with a time relay; and / or

[0018] The low voltage area is also provided with an Ethernet lightning arrester; and / or

[0019] The low-voltage area is also provided with an electric meter.

[0020] The high-voltage distribution box provided by the present invention utilizes wire troughs to separate the box into high-voltage and low-voltage areas, and configures corresponding electrical components in each area. This achieves the goal of integrating the DC high-voltage box and the AC distribution box within the same housing, facilitating modular production of the equipment. This not only improves the ease of installation and maintenance of the equipment, but also reduces the equipment size, facilitating the miniaturization of the energy storage cabinet design. Furthermore, by locating the local controller within the high-voltage distribution box, the integration of the high-voltage distribution box is improved, wiring harnesses are reduced, communication efficiency is improved, equipment failure rate is reduced, and costs are reduced. Furthermore, locating the local controller within the high-voltage box enhances the protection level of the local controller with the help of the housing.

[0021] Furthermore, by stacking the battery cluster management unit and the local controller along the height direction of the housing, the installation space can be greatly saved and the device integration can be improved.

[0022] Furthermore, by arranging the battery cluster management unit and the local controller near the center of the installation space, the battery cluster management unit and the local controller can be isolated from the high-voltage area while facilitating the connection of each controller with the communication connector arranged on the front panel.

[0023] Furthermore, by vertically attaching the switching power supply in the low-voltage area to the inner side of the housing, the horizontal space occupied can be reduced and the device integration can be improved.

[0024] Furthermore, by arranging the grid connector and the three-phase electrical connector on the back panel of the housing, corresponding connectors capable of connecting to these connectors are provided at corresponding positions on the energy storage cabinet. This improves the convenience of connecting the interfaces to each other, eliminates the need for special connections through wiring, reduces wiring harnesses, reduces costs, simplifies installation steps, and improves installation efficiency.

[0025] Furthermore, by arranging a communication connector connected to the local controller on the front panel of the housing, the convenience of wiring is improved.

[0026] In a second aspect, the present invention further provides an energy storage cabinet, which includes the high-voltage distribution box described in any of the aforementioned technical solutions.

[0027] In a third aspect, the present invention further provides an energy storage system, which includes at least one energy storage cabinet described in the aforementioned technical solution.

[0028] Those skilled in the art will understand that, since the energy storage cabinet and energy storage system provided by the present invention include the high-voltage distribution box described in any of the aforementioned technical solutions, they have all the technical effects that can be obtained by the aforementioned high-voltage distribution box, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0030] Figure 1 A schematic diagram of the internal structure of a high-voltage distribution box provided in an embodiment of the present utility model;

[0031] Figure 2 A front view of a high-voltage distribution box provided in an embodiment of the present utility model;

[0032] Figure 3 This is a rear view of the high-voltage distribution box provided in an embodiment of the present utility model.

[0033] List of reference numerals:

[0034] 1. Rotary handle; 2. DC molded case circuit breaker; 3. Fuse; 4. Main positive contactor; 5. Main negative contactor; 6. Hall current sensor; 7. Pre-charge resistor; 8. AC molded case circuit breaker; 9. Pre-charge relay; 10. High-voltage fuse; 11. Terminal block; 12. Switching power supply; 13. Wire duct; 14. Time relay; 15. Ethernet lightning arrester; 16. Metering meter; 17. Local controller; 18. Battery cluster management unit; 19. Copper busbar; 20. Knob isolating switch; 21. Battery connector; 22. Power connector; 23. LED tri-color light; 24. Communication connector; 25. 4G antenna through-hole; 26. Grid connector; 27. Three-phase electrical connector. DETAILED DESCRIPTION

[0035] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are intended only to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0036] In order to better illustrate the present invention, numerous specific details are provided in the following detailed description. It should be understood by those skilled in the art that the present invention can also be implemented without certain specific details.

[0037] In the description of this utility model, terms such as "upper," "lower," "inner," "outer," "front," "back," "left," and "right" indicating directions or positional relationships are based on the directions or positional relationships shown in the figure, where "front" refers to the direction facing the user. This is merely for convenience of description and does not indicate or imply that the device to be protected must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, the orientations described in the following embodiments should not be construed as limitations on this utility model. Furthermore, ordinal numbers such as "first" and "second" are used for convenience of description only and are not intended to indicate or imply relative importance.

[0038] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installation" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In addition, in the following description, “not shown” means that the corresponding component is not illustrated in the drawings, and “not labeled” means that the corresponding component is illustrated in the drawings but not labeled.

[0040] The high-voltage distribution box provided by the utility model is described below with reference to the accompanying drawings.

[0041] like Figure 1 As shown in the , a high-voltage distribution box for an industrial and commercial energy storage system provided by an embodiment of the present invention includes a housing, which comprises a box body (not shown) and a cover (not shown). When the box body and cover are closed, an installation space is constructed within the box body, which is suitable for installing electrical components. The box body includes a front panel, left and right side panels, a back panel, and a bottom panel. The front panel refers to the panel of the high-voltage distribution box that faces the user when the box is installed in an energy storage cabinet.

[0042] The installation space of the high voltage distribution box is provided with a plurality of wire ducts 13, which divide the installation space into a high voltage area and a low voltage area. Specifically, the wire ducts 13 include longitudinal wire ducts extending in the front-to-back direction of the high voltage distribution box and a plurality of transverse wire ducts extending in the left-right direction. Figure 1 As shown in the figure, there is one longitudinal cable trough and three transverse cable troughs. The longitudinal cable trough cooperates with the transverse cable trough to separate the area on the left side of the longitudinal cable trough and in front of the transverse cable trough close to the front plate into a high-voltage area, and separates the area on the right side of the longitudinal cable trough and behind the transverse cable trough close to the front plate into a low-voltage area, which is used to realize the power distribution function.

[0043] Specifically, if Figure 1 As shown in FIG, a DC molded case circuit breaker 2, a fuse 3, a total positive contactor 4, a total negative contactor 5, a Hall current sensor 6, an AC molded case circuit breaker 8, a copper bus 19, etc. are provided in the high voltage area. Figure 2As shown in FIG, a battery connector 21 and a power connector 22 are provided on the front panel of the housing. The battery connector 21 includes a positive battery connector B+ and a negative battery connector B-; the power connector 22 includes a positive power connector P+ and a negative power connector P-. The positive battery connector B+, the DC molded case circuit breaker 2, the fuse 3, the main positive contactor 4, and the positive power connector P+ are connected via a copper bus 19 to form a positive circuit. The negative battery connector B-, the Hall current sensor 6, the main negative contactor 5, the DC molded case circuit breaker 2, and the negative power connector P- are connected via a copper bus 19 to form a negative circuit. The positive battery connector B+ and the negative battery connector B- connect to the battery cluster, while the positive power connector P+ and the negative power connector P- connect to the power source, such as the PCS (Power Conversion System). The PCS is a key component in the energy storage system that converts power. It is primarily responsible for converting DC power within the energy storage system into AC power, and converting AC power from the grid or other power sources into DC power. This conversion satisfies the charging and discharging requirements of the energy storage system. In this embodiment, the power supply side converts the 220V AC power supply or the high-voltage DC power supply of the battery cluster side into 24V DC power for use by the electrical components in the box.

[0044] The positive circuit is also connected to a pre-charge resistor 7 and a pre-charge relay 9. These resistors are used to pre-charge the PCS to prevent arcing and contactor adhesion. A DC molded case circuit breaker 2 controls the current flow in the positive and negative circuits, providing overload and short-circuit protection. A fuse 3 serves as a short-circuit protection element. A Hall effect current sensor 6 measures the direction and magnitude of the current. A copper busbar 19 serves as a current-carrying element for connecting electrical components.

[0045] like Figure 2 As shown in the figure, a rotary handle 1 is also installed on the front panel of the shell. The rotary handle 1 is electrically connected to the DC molded case circuit breaker 2 and is used to control the on and off of the circuit in the box by the DC molded case circuit breaker 2. When the high-voltage distribution box fails or requires maintenance, the staff can manually operate it, that is, by twisting the rotary handle 1 to disconnect the circuit in the distribution box, thereby playing a role of isolation protection.

[0046] In the embodiment of the present invention, the low-voltage area is equipped with a switching power supply 12, a terminal block 11, a time relay 14, an Ethernet lightning arrester 15, an electric meter, etc., as well as a battery cluster management unit (BCU) and a local controller 17. The battery cluster management unit 18 is a key component for managing and monitoring the battery cluster. The battery cluster management unit 18 receives various single-cell battery information uploaded from the BMU (Battery Management Unit) and processes and analyzes it to ensure the safe and efficient operation of the battery cluster. The local controller 17 is used to receive and store control strategies issued by the remote host and monitor and control local field equipment according to the predetermined control strategies.

[0047] In the present invention, the installation space is divided into functional areas by the wire trough 13. The shell of the wire trough 13 is made of plastic material and has certain insulation properties. With the help of the insulation properties of the wire trough 13, the partitions are isolated from each other, making the components in the box more regular while reducing the influence between the components.

[0048] Furthermore, the battery cluster management unit 18 and the local controller 17 in this embodiment are stacked and installed along the height direction of the housing. Figure 1 In the direction perpendicular to the paper. Specifically, the local controller 17 is mounted above the battery cluster management unit 18 using fasteners such as screws and bolts. Because the battery cluster management unit 18 and the local controller 17 each generate minimal heat, they can be stacked without causing heat dissipation issues. This allows the high-voltage distribution box to be integrated with the functions of the local controller 17, improving its integration and space utilization, while also reducing wiring and lowering production costs.

[0049] Furthermore, if Figure 1 As shown in the figure, the battery cluster management unit 18 and the local controller 17 are arranged in the middle position of the installation space along the front-to-back direction. In this way, without interfering with the high-voltage area, the local controller 17 and the battery cluster management unit 18 can be closer to the communication connector 24 provided on the front panel, thereby reducing or at least shortening the wiring length, reducing costs, and improving the integration of the high-voltage distribution box.

[0050] Specifically, if Figure 2As shown in , communication connectors 24J1 to J4 are provided on the front panel of this embodiment, wherein the communication connector 24J1 is connected to the battery cluster management unit 18, and J2 to J4 are connected to the local controller 17, for realizing communication between the battery cluster management unit 18 and the local controller 17 and the outside, and the battery cluster management unit 18 and the local controller 17 are connected to the low-voltage area and draw power from the low-voltage area.

[0051] Continue to refer Figure 1 In this embodiment, the low-voltage area of ​​the high-voltage distribution box is also equipped with a switching power supply 12. This switching power supply 12 is vertically attached to the inner side of the housing's backplate. It is electrically connected to a local controller 17, a battery cluster management unit 18, and other components, providing 24V DC power to these components. By attaching the switching power supply 12 vertically to the inner side of the housing's backplate, installation space is conserved, space utilization is improved, and the volume of the high-voltage distribution box is reduced.

[0052] It should be noted that the battery cluster management unit can also be installed vertically on the inner side of the side panel. Regardless of whether it is installed on the back panel or the side panel, the purpose is to save installation space.

[0053] like Figure 3 As shown in the figure, the back panel of the high-voltage distribution box housing provided by the embodiment of the present invention is further provided with multiple grid connectors 26 and multiple three-phase electrical connectors 27. Specifically, there are three grid connectors 26A, B, and C for connecting to the incoming lines of the power grid, and three three-phase electrical connectors 27U, V, and W. An AC molded case circuit breaker 8 is also connected to the line between the grid connector 26 and the three-phase electrical connector 27. The AC molded case circuit breaker 8 is used to control the on and off of the AC line and provide overload and short-circuit protection for the PCS. Specifically, after the AC power enters from the A / B / C connector, it passes through the AC molded case circuit breaker 8 to the U / V / W three-phase electrical connector 27. The three-phase electrical connector 27 is connected to the PCS through wiring. The PCS is connected to the high-voltage area through the positive power connector P+ and the negative power connector P- of the high-voltage box. The electric meter is connected in parallel at the position of the AC molded case circuit breaker 8. The electric meter outputs 220VAC to power the switching power supply 12, and the switching power supply 12 provides 24V power to the battery cluster management unit 18 and the local controller 17 after conversion.

[0054] The low-voltage area of ​​the present invention is also equipped with a terminal block 11, a time relay 14, an Ethernet lightning arrester 15, and an electric meter. Terminal block 11 is the 24V power shorting point for the auxiliary power supply; time relay 14 is used for delay control of the emergency stop switch; Ethernet lightning arrester 15 is used to protect communications from external surges; and electric meter 16 is used to measure the power consumption of the auxiliary power supply.

[0055] like Figure 1As shown in the figure, a high-voltage fuse 103 is also installed in the low-voltage area. This protects the high-voltage area from the low-voltage area and disconnects the circuit when the voltage input from the high-voltage area exceeds the voltage that the low-voltage area can withstand. A rotary isolation switch 20 and a three-color LED light 23 are also provided on the front panel. The rotary isolation switch 20 is used to trip the power switch in an emergency, while the three-color LED light 23 serves as a fault / high voltage / low voltage (red, yellow, and green) status indicator for the energy storage system.

[0056] In addition, if Figure 3 As shown in , a 4G antenna through hole 25 is also provided on the back panel to facilitate receiving 4G signals and configuring a 4G traffic card for the high-voltage distribution box, etc., in order to provide a basis for future system upgrades.

[0057] In addition, the present invention also provides an energy storage cabinet, which includes a cabinet body, in which a battery cluster, a PCS, a fire-fighting device, etc. are arranged, and the high-voltage distribution box in the above embodiment is also arranged.

[0058] An embodiment of the present invention also provides an energy storage system, which includes one or more of the above-mentioned energy storage cabinets, such as 1 to 10 energy storage cabinets. The energy storage cabinets can be connected in parallel, in series, or in series-parallel, and are usually connected by means of a junction box and a connecting cable.

[0059] It should be noted that although the above embodiments illustrate the application of distribution boxes, energy storage cabinets, and energy storage systems to industrial and commercial energy storage, this is not restrictive. The above distribution boxes, energy storage cabinets, and energy storage systems can also be applied to other fields such as communication base stations and data centers, transportation facilities, new energy power stations and smart microgrids, and electric vehicle charging piles, etc.

[0060] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A high voltage distribution box, characterized in that: The high-voltage distribution box includes: A housing having an internal structure with an installation space; A wire trough, which separates the installation space into a high-voltage area and a low-voltage area, Wherein, a local controller is provided in the low-voltage area; In which, the high-voltage area includes a DC molded case circuit breaker, a fuse, a total positive contactor, a total negative contactor, and a Hall current sensor. The front panel of the shell is also provided with a battery positive connector, a battery negative connector, a power supply positive connector, and a power supply negative connector. The battery positive connector, the DC molded case circuit breaker, the fuse, the total positive contactor and the power supply positive connector are connected to form a positive circuit, and the battery negative connector, the Hall current sensor, the total negative contactor, the DC molded case circuit breaker and the power supply negative connector are connected to form a negative circuit.

2. The high-voltage distribution box according to claim 1, characterized in that: The low-voltage area is further provided with a battery cluster management unit, and the battery cluster management unit and the local controller are stacked and installed along the height direction of the housing.

3. The high-voltage distribution box according to claim 2, characterized in that: The battery cluster management unit and the local controller are arranged in a middle position of the installation space along the front-to-back direction.

4. The high-voltage distribution box according to claim 1, characterized in that: The low-voltage area is further provided with a switching power supply, which is vertically attached to the inner side of the housing; and / or The front panel of the housing is also provided with a plurality of communication connectors connected to the local controller.

5. The high-voltage distribution box according to claim 1, characterized in that: The back plate of the housing is further provided with a plurality of grid connectors and a plurality of three-phase electrical connectors.

6. The high-voltage distribution box according to claim 5, characterized in that: An AC molded case circuit breaker is also connected to the line between the grid connector and the three-phase electrical connector.

7. The high-voltage distribution box according to claim 1, characterized in that: The low voltage area is further provided with a terminal block; and / or The low-voltage zone is further provided with a time relay; and / or The low voltage area is also provided with an Ethernet lightning arrester; and / or The low-voltage area is also provided with an electric meter.

8. An energy storage cabinet, characterized in that: The energy storage cabinet includes the high-voltage distribution box according to any one of claims 1 to 7.

9. An energy storage system, characterized in that: The energy storage system comprises at least one energy storage cabinet according to claim 8.

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