High-voltage distribution box and energy storage cabinet

Abstract

The invention provides a high-voltage distribution box and an energy storage cabinet, and relates to the technical field of energy storage systems. The high-voltage distribution box comprises a main control unit, a battery control unit, a centralized line bank and a first power supply module; the main control unit is connected with a high-voltage busbar of the high-voltage distribution box, one end of the high-voltage busbar is used for being connected with an energy storage module in an energy storage cabinet where the high-voltage distribution box is located, and the other end of the high-voltage busbar is used for being connected with an energy storage converter in the energy storage cabinet; the input end of the first power supply module is connected with the high-voltage bus bar, and the output end of the first power supply module is connected with the concentrated connector bar, so that the first power supply module outputs power to the concentrated connector bar after taking the power from the high-voltage bus bar; and the centralized line bank is connected with each electric device in the energy storage cabinet. According to the invention, only the high-voltage distribution box is used for supplying power to each electric device in the energy storage cabinet, the system architecture of the energy storage cabinet is simplified, the cost is reduced, and the power supply stability and the operation and maintenance efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of energy storage system technology, and more specifically, to a high-voltage distribution box and an energy storage cabinet. Background Technology

[0002] In the field of energy storage system technology, the high-voltage distribution box, as the core power distribution and control unit of the energy storage cabinet, directly affects the integration, operating efficiency, and cost control of the entire energy storage system. Currently, most high-voltage distribution boxes on the market have limited power supply range design. Their power supply architecture is configured only to meet the power needs of the electrical components inside the high-voltage distribution box, providing power support only to the core control module within the box. They cannot extend to other terminal equipment outside the high-voltage box in the energy storage cabinet system, such as auxiliary components for energy storage converters, environmental monitoring devices, cooling fans, access control systems, and audible and visual alarm devices.

[0003] The aforementioned limitations in power supply range lead to significant shortcomings in the practical application of energy storage cabinet systems. To ensure the normal operation of other equipment outside the high-voltage box, a separate dedicated distribution box needs to be designed, along with independent power supply lines and protection circuits, to provide power to other terminal equipment outside the high-voltage box. This design not only increases the overall hardware cost, installation space occupation, and wiring complexity of the energy storage system, but also reduces the system's integration level and operational reliability. The parallel operation of multiple sets of power distribution equipment increases the number of failure points, and the lack of coordination and linkage mechanisms between different distribution boxes can easily lead to problems such as inconsistent power supply timing and conflicting protection logic, thereby affecting the stable operation and ease of maintenance of the energy storage system. At the same time, the addition of an extra distribution box also increases the later operation and maintenance costs of the system, which is not conducive to the large-scale promotion and application of energy storage projects.

[0004] Therefore, it is urgent to optimize the power supply architecture of the existing high-voltage box system to solve problems such as low system integration, high cost and insufficient reliability caused by its limited power supply range. Summary of the Invention

[0005] This application addresses the shortcomings of the prior art by providing a high-voltage distribution box and energy storage cabinet to solve the problems existing in the prior art.

[0006] The technical solution adopted in the embodiments of this application is as follows: In a first aspect, embodiments of this application provide a high-voltage distribution box, including: a main control unit, a battery control unit, a centralized terminal block, and a first power module; the main control unit is connected to the high-voltage busbar of the high-voltage distribution box, one end of the high-voltage busbar is used to connect to the energy storage module in the energy storage cabinet where the high-voltage distribution box is located, and the other end of the high-voltage busbar is used to connect to the energy storage converter in the energy storage cabinet; The input terminal of the first power module is connected to the high-voltage busbar, and the output terminal of the first power module is connected to the centralized terminal block, so that the first power module draws power from the high-voltage busbar and outputs it to the centralized terminal block. The central terminal block connects to each electrical device in the energy storage cabinet; the central terminal block is also connected to the main control unit through the battery control unit.

[0007] In one embodiment, the high-voltage distribution box further includes a second power module, wherein the input terminal of the second power module is used to connect to a preset AC power source, and the output terminal of the second power module is connected to the centralized terminal block, so that the second power module draws power from the preset AC power source and outputs it to the centralized terminal block.

[0008] In one embodiment, the high-voltage distribution box further includes: a first unidirectional conducting device and a second unidirectional conducting device; The positive line of the output terminal of the first power module is connected to the centralized terminal block through the first unidirectional conducting device; The positive line of the output terminal of the second power module is connected to the central terminal block through a second unidirectional conduction device.

[0009] In one embodiment, both the first unidirectional conducting device and the second unidirectional conducting device are a diode or at least two diodes connected in parallel.

[0010] In one embodiment, the high-voltage distribution box further includes: a first resettable fuse and a second resettable fuse; The positive line of the output terminal of the first power module is connected to the central terminal block in sequence through the first unidirectional conducting device and the first resettable fuse; The positive line of the output terminal of the second power module is connected to the central terminal block in sequence through the second unidirectional conducting device and the second resettable fuse.

[0011] In one embodiment, the electrical equipment in the energy storage cabinet includes: a display device, a dehumidifier, a fire-fighting device, an input / output module, a temperature and humidity monitoring device, and an edge computing gateway; The display device, the dehumidifier, the fire-fighting equipment, the input / output module, the temperature and humidity monitoring device, and the edge computing gateway all draw power from the central terminal block.

[0012] In one embodiment, the edge computing gateway is also communicatively connected to at least one of the following devices: the energy storage converter, the grid-connected / off-grid switch, the maximum power point tracking (MPPT) controller, the electricity meter, and the human-machine interface device.

[0013] In one embodiment, an emergency stop switch is connected between the positive and negative lines in the centralized terminal block.

[0014] In one embodiment, the diode is a germanium diode.

[0015] Secondly, embodiments of this application provide an energy storage cabinet, including: a high-voltage distribution box as described in any of the above embodiments, and at least one electrical device; the centralized terminal block in the high-voltage distribution box is connected to the at least one electrical device.

[0016] The beneficial effects of this application are: a high-voltage distribution box is provided, including a main control unit, a battery control unit, a centralized terminal block, and a first power module; the main control unit is connected to the high-voltage busbar of the high-voltage distribution box, one end of the high-voltage busbar is used to connect to the energy storage module in the energy storage cabinet where the high-voltage distribution box is located, and the other end of the high-voltage busbar is used to connect to the energy storage converter in the energy storage cabinet; the input end of the first power module is connected to the high-voltage busbar, and the output end of the first power module is connected to the centralized terminal block, so that the first power module draws power from the high-voltage busbar and outputs it to the centralized terminal block; the centralized terminal block is connected to each electrical device in the energy storage cabinet; the centralized terminal block is also connected to the main control unit through the battery control unit.

[0017] Among them, a high-voltage distribution box is used to supply power to each electrical device in the energy storage cabinet. There is no need to design an additional dedicated distribution box. This can realize the power supply to other terminal devices other than the high-voltage box, simplifying the energy storage cabinet system architecture, reducing costs, and improving power supply stability and operation and maintenance efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the high-voltage distribution box provided in the embodiments of this application; Figure 2 This is a second schematic diagram of the structure of the high-voltage distribution box provided in the embodiments of this application; Figure 3 This is a schematic diagram of the communication relationship of the edge computing gateway provided in the embodiments of this application; Figure 4 This is a schematic diagram of an emergency stop switch provided in an embodiment of this application.

[0020] Explanation of reference numerals in the attached diagram: 1. Main control unit; 2. Battery control unit; 3. Central terminal block; 4. First power module; 5. Second power module; 6. First unidirectional conducting device; 7. Second unidirectional conducting device; 8. First resettable fuse; 9. Second resettable fuse. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] In the description of this application, it should be noted that if the terms "upper", "lower", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0027] The following examples, in conjunction with the accompanying drawings, provide specific illustrations of the high-voltage distribution box provided in this application.

[0028] Figure 1 This is one of the structural schematic diagrams of the high-voltage distribution box provided in the embodiments of this application, such as... Figure 1 As shown, the high-voltage distribution box includes a main control unit 1, a battery control unit 2, a centralized terminal block 3, and a first power supply module 4.

[0029] The main control unit (BCU-B30-201) is the core control hub, connected to the high-voltage busbar of the high-voltage distribution box. One end of the high-voltage busbar is used to connect to the energy storage modules (BAT+, BAT-) in the energy storage cabinet where the high-voltage distribution box is located, and the other end of the high-voltage busbar is used to connect to the energy storage converters (PCS+, PCS-) in the energy storage cabinet. The main control unit can realize the logical control of the high-voltage circuit (such as the charging and discharging of energy storage modules, and the start and stop of energy storage converters), and at the same time receive the equipment data fed back by the edge computing gateway (EMU) to support the overall operation and scheduling of the system.

[0030] The input terminal of the first power module is connected to the high-voltage busbar, and the output terminal of the first power module is connected to the centralized terminal block (denoted as XT) so that the first power module draws power from the high-voltage busbar and outputs it to the centralized terminal block. The first power module is a 300-1500DCV to 24DCV DC to DC power module.

[0031] The centralized junction box is the "hub" for system power supply and drawdown. It integrates the output power of the first and second power modules to provide unified power supply for all electrical equipment in the energy storage cabinet, simplifying wiring and improving power distribution stability.

[0032] The energy storage cabinet contains various electrical devices, including display devices, dehumidifiers, fire-fighting equipment, input / output modules (I / O modules, each with 4DI and 4DO interfaces, used to collect control signals from access control, operation indicator lights, etc., and then forward the data to the edge computing gateway), temperature and humidity monitoring equipment, and the edge computing gateway. A central terminal block connects all these devices, meaning that the display devices, dehumidifiers, fire-fighting equipment, input / output modules, temperature and humidity monitoring equipment, and edge computing gateway all draw power from the central terminal block. The central terminal block also connects to the main control unit via the battery control unit (BCU), supplying power to the main control unit.

[0033] In summary, this embodiment provides a high-voltage distribution box that supplies power to all electrical equipment in the energy storage cabinet. This eliminates the need for a separate dedicated distribution box and enables power supply to other terminal equipment in the energy storage cabinet besides the high-voltage box. This simplifies the energy storage cabinet system architecture, reduces costs, and improves power supply stability and operation and maintenance efficiency.

[0034] The high-voltage distribution box also includes a second power supply module 5. The input end of the second power supply module is used to connect to a preset AC power supply, and the output end of the second power supply module is connected to a centralized terminal block, so that the second power supply module draws power from the preset AC power supply and outputs it to the centralized terminal block.

[0035] The second power module is an AC-to-DC power module that converts 230ACV to 24DCV. The second power module and the first power module form a dual power supply architecture, which avoids system power failure due to a single power supply failure and improves power supply reliability.

[0036] The high-voltage distribution box also includes a first unidirectional conducting device 6 and a second unidirectional conducting device 7. The positive line of the output terminal of the first power module is connected to the centralized terminal block through the first unidirectional conducting device, and the positive line of the output terminal of the second power module is connected to the centralized terminal block through the second unidirectional conducting device.

[0037] Figure 2 This is a second structural schematic diagram of the high-voltage distribution box provided in the embodiments of this application, as shown below. Figure 2 As shown, both the first and second unidirectional conducting devices are diodes or at least two diodes connected in parallel (such as FR307). Their core function is to achieve electrical isolation between the two power supplies, prevent short circuits caused by reverse power supply from the two power modules, and ensure the stable operation of the dual power supply architecture. Furthermore, the diodes are germanium diodes, which have low voltage drop and high resistivity characteristics, thus avoiding excessive voltage loss and preventing damage to the device's DI port due to the voltage difference between the XT24V DC power supply and the output voltage of the BCU main control pin.

[0038] The high-voltage distribution box also includes a first resettable fuse 8 and a second resettable fuse 9. The positive line of the output end of the first power module is connected to the centralized terminal block in sequence through the first unidirectional conducting device and the first resettable fuse. The positive line of the output end of the second power module is connected to the centralized terminal block in sequence through the second unidirectional conducting device and the second resettable fuse.

[0039] A resettable fuse is connected in series after a unidirectional conducting device and works with a diode to form dual protection. When an overload or short circuit occurs in the circuit, the fuse automatically disconnects and cuts off the circuit. After the fault is cleared, it can recover on its own without replacement, which not only avoids damage to the power module but also improves the convenience of system maintenance.

[0040] The edge computing gateway has 2 optical, 4 serial, and 2 electrical communication interfaces. It collects the operating data of each electrical device in the energy storage cabinet through serial port RTU485 protocol communication. The edge computing gateway is also equipped with a 4G communication module, which can process the acquired data and upload the data to the cloud platform through electrical port TCP485 communication (supporting IEC104, DL476, IEC102, IEC101 and other protocol communication) to realize remote system monitoring. When the system alarms, it can also notify the staff (for example, by sending an SMS to the staff's mobile phone).

[0041] For example, an edge computing gateway filters key performance data, performs real-time algorithm calculations, temporarily stores the results in a cache, and then sends them to the power-consuming equipment via a communication interface. Taking the anti-backflow strategy algorithm as an example, the edge computing gateway establishes communication with the grid-connected power meter, extracts the real-time power value P collected by the meter, and performs real-time calculations. In the self-consumption grid-connected mode, the energy storage cabinet's power is prohibited from being connected to the grid and can only be supplied to the load. The algorithm adjusts the energy storage output by judging the positive or negative value of P: when the P value is negative, it indicates that the energy storage cabinet is outputting too much power and needs to reduce the output to avoid excess power being connected to the grid and wasted; when the P value is positive, it indicates that the energy storage cabinet is outputting too little power and needs to increase the output to reduce the use of grid power and reduce electricity costs.

[0042] Figure 3 This is a schematic diagram of the communication relationship of the edge computing gateway provided in the embodiments of this application, as shown below. Figure 3 As shown, the edge computing gateway also communicates with at least one of the following devices: energy storage converter PCS, grid-connected / off-grid switch STS, maximum power point tracking (MPPT) controller, electricity meter, and human-machine interface (HMI).

[0043] like Figure 4As shown, an emergency stop switch SB1 is connected between the positive and negative lines of the centralized terminal block. This switch forms a physical control loop independent of the BCU main control circuit. In case of an emergency, the operator can manually trigger the emergency stop switch SB1 to directly cut off the power output of the centralized terminal block, quickly isolating the risk point and ensuring the safety of personnel and equipment.

[0044] In summary, this application provides a high-voltage distribution box with the following advantages: 1. By optimizing the entire process of power intake and supply in a centralized manner, a high-voltage distribution box is used to supply power to each electrical device in the energy storage cabinet. There is no need to design a separate dedicated distribution box. This can realize the power supply to other terminal devices in the energy storage cabinet other than the high-voltage box, simplifying the system architecture of the energy storage cabinet, reducing costs, and improving power supply stability and operation and maintenance efficiency.

[0045] 2. Two power modules are selected to build a redundant architecture to avoid system power failure caused by a single power supply failure, effectively improving power supply stability.

[0046] 3. Edge computing gateway (equipped with a 4G communication module) collects and processes data from the energy storage cabinet equipment locally, and uploads the data to the cloud platform to achieve remote system monitoring.

[0047] 4. The centralized terminal block is equipped with an emergency stop control circuit. In the event of a sudden emergency, the operator can manually trigger the emergency stop switch to directly cut off the power output of the centralized terminal block, quickly isolate the risk point, and ensure the safety of personnel and equipment.

[0048] This application also provides an energy storage cabinet, including a high-voltage distribution box as described in any of the above embodiments, and at least one electrical device. The centralized terminal block in the high-voltage distribution box connects to at least one electrical device. The high-voltage distribution box is the core power distribution and control unit of the energy storage cabinet. Through the centralized terminal block, it is linked with all electrical devices in the energy storage cabinet to achieve power supply redundancy, centralized power distribution, remote monitoring, and dual security. The dual power supply design solves the defect of single power supply in traditional systems. The edge computing gateway and I / O module make up for the shortcomings of terminal device monitoring and remote operation and maintenance. The emergency stop circuit and protection devices enhance the system safety performance, fully adapting to the diverse application scenarios of the energy storage cabinet.

[0049] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-voltage distribution box, characterized in that, include: The system includes a main control unit, a battery control unit, a centralized terminal block, and a first power supply module. The main control unit is connected to the high-voltage busbar of the high-voltage distribution box. One end of the high-voltage busbar is used to connect to the energy storage module in the energy storage cabinet where the high-voltage distribution box is located, and the other end of the high-voltage busbar is used to connect to the energy storage converter in the energy storage cabinet. The input terminal of the first power module is connected to the high-voltage busbar, and the output terminal of the first power module is connected to the centralized terminal block, so that the first power module draws power from the high-voltage busbar and outputs it to the centralized terminal block. The central terminal block connects to each electrical device in the energy storage cabinet; the central terminal block is also connected to the main control unit through the battery control unit.

2. The high-voltage distribution box according to claim 1, characterized in that, The high-voltage distribution box further includes a second power module, the input terminal of which is connected to a preset AC power source, and the output terminal of which is connected to the centralized terminal block, so that the second power module draws power from the preset AC power source and outputs it to the centralized terminal block.

3. The high-voltage distribution box according to claim 2, characterized in that, The high-voltage distribution box also includes: a first unidirectional conducting device and a second unidirectional conducting device; The positive line of the output terminal of the first power module is connected to the centralized terminal block through the first unidirectional conducting device; The positive line of the output terminal of the second power module is connected to the central terminal block through a second unidirectional conduction device.

4. The high-voltage distribution box according to claim 3, characterized in that, Both the first unidirectional conducting device and the second unidirectional conducting device are either a diode or at least two diodes connected in parallel.

5. The high-voltage distribution box according to claim 3, characterized in that, The high-voltage distribution box also includes: a first resettable fuse and a second resettable fuse; The positive line of the output terminal of the first power module is connected to the central terminal block in sequence through the first unidirectional conducting device and the first resettable fuse; The positive line of the output terminal of the second power module is connected to the central terminal block in sequence through the second unidirectional conducting device and the second resettable fuse.

6. The high-voltage distribution box according to claim 1, characterized in that, The electrical equipment in the energy storage cabinet includes: display devices, dehumidifiers, fire-fighting equipment, input / output modules, temperature and humidity monitoring equipment, and edge computing gateways; The display device, the dehumidifier, the fire-fighting equipment, the input / output module, the temperature and humidity monitoring device, and the edge computing gateway all draw power from the central terminal block.

7. The high-voltage distribution box according to claim 6, characterized in that, The edge computing gateway is also communicatively connected to at least one of the following devices: the energy storage converter, the grid-connected / off-grid switch, the maximum power point tracking (MPPT) controller, the electricity meter, and the human-machine interface device.

8. The high-voltage distribution box according to claim 1, characterized in that, An emergency stop switch is connected between the positive and negative lines in the centralized terminal block.

9. The high-voltage distribution box according to claim 4, characterized in that, The diode is a germanium diode.

10. An energy storage cabinet, characterized in that, include: The high-voltage distribution box according to any one of claims 1-9, and at least one electrical device; The centralized terminal block in the high-voltage distribution box connects to at least one electrical device.

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