A prepackaged direct current coupling light storage and charging integrated cabinet

Abstract

The utility model discloses a kind of prepackaged direct current coupling light storage and charging integrated cabinet, integrated photovoltaic system, energy storage system, electric vehicle charging system and control power system, realize efficient collaborative optimization by modular design, suitable for energy storage, light storage, light storage and charging and multiple application scenarios.Optimize power generation efficiency, and photovoltaic system includes photovoltaic access module and circuit breaker;Energy storage system includes battery system, battery access module and energy storage converter, realizes energy storage and dispatching;Charging system includes charging output module and circuit breaker, supports electric vehicle charging;Control power system takes electricity from energy storage battery, uses high rate buck DCDC module, configures fuse and circuit breaker, supports off-grid operation, reduces external power dependence.Cabinet body is equipped with electric starting and thermosensitive starting double fire protection, smoke and temperature detector is combined with thermosensitive wire, ensure safe operation under extreme fire condition.Compared with traditional equipment, the utility model has high integration, small floor area, low installation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to a pre-installed DC-coupled optical storage and charging integrated cabinet, belonging to the field of optical storage and charging integrated cabinets. Background Technology

[0002] With the rapid development of renewable energy and electric vehicles, the demand for photovoltaic power generation, energy storage systems, and electric vehicle charging equipment is increasing. However, traditional photovoltaic, energy storage, and charging equipment are typically independent unit components, requiring separate installation, connection, and maintenance. This design presents the following problems: 1. Low system integration: Photovoltaic, energy storage and charging equipment are independent and have complex structures. The data interaction and energy dispatch efficiency between the equipment is low, resulting in low energy utilization.

[0003] 2. Large footprint: Multiple independent devices require a large installation space, increasing construction and maintenance costs.

[0004] 3. Compatibility issues: Equipment from different manufacturers may have compatibility issues, affecting the coordinated operation of the system.

[0005] 4. Limited off-grid application: Traditional control power supplies are mostly taken from the AC side or rely on UPS power supplies, which have limited off-grid operation capabilities. In addition, UPS power supplies are expensive and have poor environmental adaptability.

[0006] 5. Inadequate fire safety: Traditional equipment is usually only equipped with electrically activated fire suppression devices, lacking multiple protection mechanisms, making it difficult to cope with extreme fire situations.

[0007] Therefore, it is necessary to design a highly integrated, modular, off-grid-compatible photovoltaic-storage-charging integrated device with high fire protection to solve the above problems, reduce user costs, and improve energy utilization efficiency. Utility Model Content

[0008] The purpose of this invention is to provide a pre-installed DC-coupled optical storage and charging integrated cabinet, which can effectively solve the above-mentioned problems.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: It includes a photovoltaic system, an energy storage system, a charging system, and a power control system; the photovoltaic system, the energy storage system, and the charging system adopt a modular design and are integrated into a single cabinet, which achieves coordinated optimization between the systems through an energy management system; wherein: The photovoltaic system includes a photovoltaic access module (MPPT) and a photovoltaic access circuit breaker (QF3) for connecting to photovoltaic power generation; The energy storage system includes a battery system (BES), a battery access module (1#DCDC), and a grid-connected energy storage converter (PCS) for storing photovoltaic energy and realizing energy dispatch. The charging system includes a charging output module (2#DCDC) and a charging access circuit breaker (QF4) for providing charging for electric vehicles; The power control system adopts a high-rate step-down DC-DC module, draws power directly from the energy storage battery, and is equipped with a high-breaking-capacity DC fuse (FU2) and an air circuit breaker (QF2). It is controlled by the energy management system to reduce battery loss and support off-grid operation.

[0010] Furthermore, the integrated cabinet supports multiple application scenarios, including energy storage, photovoltaic-storage, and photovoltaic-storage-charging scenarios, and can achieve various topological forms by configuring internal modules.

[0011] Furthermore, the integrated cabinet also includes a fire protection system, which has both electric start and thermal start modes. The electric starter detects the fire through smoke detectors and heat detectors, outputs signals to control the audible and visual alarms and activate the fire extinguishing device, and simultaneously feeds back signals to the energy management system (EMS). The thermal activation activates the aerosol generator through the combustion of the thermal wire to extinguish the fire and sends a feedback signal to the energy management system (EMS).

[0012] Furthermore: the internal layout of the integrated cabinet includes an electrical compartment on the left and a battery compartment on the right; the electrical compartment is equipped with power modules, photovoltaic MPPT modules, PCS, meters, surge protectors, miniature circuit breakers and incoming molded case circuit breakers; the battery compartment is equipped with battery packs and a high-voltage box.

[0013] Furthermore, the topology of the power control system includes a high-voltage box contactor (KM1), a high-voltage box fuse (FU1), a power control fuse (FU2), and a power control circuit breaker (QF2) to protect the battery charging and discharging circuit and the power control circuit.

[0014] Furthermore, the topology of the energy storage scenario includes a grid access circuit breaker (QF1), a protection access circuit breaker (QF2), a load access circuit breaker (QF3), a smart static switching module (STS), a PCS, a battery access module (DCDC), and a battery system (BES) to meet the requirements for seamless off-grid switching operation.

[0015] Furthermore, the topology of the photovoltaic energy storage scenario includes grid access circuit breakers (QF1, QF2), photovoltaic access circuit breakers (QF3), photovoltaic access modules (MPPT), battery access modules (DCDC), PCS, and battery systems (BES) to meet photovoltaic energy storage requirements.

[0016] The beneficial effects are: 1. The integrated photovoltaic, energy storage and charging cabinet proposed in this utility model has a higher degree of integration and more application scenarios. Compared with traditional photovoltaic, energy storage and charging equipment, the data acquisition and interaction between various modules is rapid, and the use and distribution of energy can be automatically adjusted to optimize the system's operating efficiency and improve energy utilization efficiency.

[0017] 2. Compared with the previous design where the control power supply draws power from the UPS, this utility model innovatively adopts a self-powered control power supply system, combined with an auxiliary power supply design, which reduces dependence on external power supply and reduces operating costs. Compared with the low environmental adaptability of UPS products, this utility model has greatly improved the independence and stability of the system.

[0018] 3. Traditional equipment usually only has an electrically activated fire extinguishing device. The fire protection module of this utility model introduces dual protection of thermal protection and electric activation, ensuring that the equipment can still operate safely under extreme conditions and avoiding safety hazards such as equipment damage or fire caused by overheating or power failure.

[0019] 4. This utility model integrates photovoltaic power generation, energy storage system and charging function into a unified cabinet. The internal modules of the product can be configured according to the usage scenario. Compared with the previous independent unit components, this design realizes multiple application forms of one product. The structure is simple and suitable for mass production. Attached Figure Description

[0020] For ease of explanation, this utility model is described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the internal structure of the integrated cabinet of this utility model; Figure 2 This is a system topology diagram of the present invention; Figure 3 This is a topology diagram of the energy storage cabinet system of this utility model; Figure 4 This is a topology diagram of the optical storage cabinet system of this utility model; Figure 5 This is a topology diagram of the optical storage and charging cabinet system of this utility model; Figure 6 This is a power control topology diagram of the present invention; Figure 7 This is the fire alarm activation logic diagram of this utility model. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] See Figure 1-7 This is one embodiment of a pre-installed DC-coupled optical storage and charging integrated cabinet according to the present invention. like Figure 1 The integrated photovoltaic, energy storage, and charging cabinet shown integrates a photovoltaic system, an energy storage system, an electric vehicle charging system, and a control power system. It achieves coordinated optimization through an energy management system (EMS) and is suitable for various scenarios such as energy storage, photovoltaic-energy storage, and photovoltaic-energy storage-charging.

[0025] like Figure 2 The system topology diagram configuration is shown below: 1) QF1~2: Configure grid connection circuit breakers, with current meeting the PCS operating current and voltage; 2) QF3: Configure a photovoltaic access circuit breaker to meet the access voltage and current requirements of the photovoltaic system; 3) QF4: Configure a charging access circuit breaker to meet the operating voltage and current requirements of DC-DC converter #2; 4) MPPT: Configures photovoltaic access modules to meet the needs of photovoltaic systems; 5) 1#DCDC: Configured with a battery access module to meet the voltage and current requirements of the energy storage battery system; 6) 2#DCDC: Configured with a charging output module to meet the system requirements of the charging module; 7) PCS: Configure grid-connected energy storage converters to meet the power requirements of battery systems and loads; 8) BES: Configure a battery system to meet the requirements for storing photovoltaic energy.

[0026] like Figure 2 As shown in the diagram, the charging system includes a charging output module (2#DCDC, output voltage 200V-750V) and a charging access circuit breaker (QF4) to provide DC charging for electric vehicles.

[0027] like Figure 6 The power control topology configuration is shown below: 1) KM1: Equipped with a high-voltage box and contactor to protect the battery charging and discharging circuit; 2) FU1: Configure a high-voltage box with a fuse to protect the battery charging and discharging circuit; 3) FU2: Configure the control power supply to the fuse to protect the DC / DC working circuit; 4) QF1: Configure a high-voltage box connected to a circuit breaker, with current meeting the battery charging and discharging operating current and voltage; 5) QF2: Configure the control power supply to the circuit breaker to meet the DC / DC operating current and voltage requirements; 6) DC-DC: Configure a control power input module to ensure that the battery can detect the voltage output of the control power supply.

[0028] like Figure 6 As shown in the diagram, the power control topology diagram shows that the power control system uses a high-rate step-down DC-DC module, which draws power directly from the BES (outputting 24V / 48V), and is equipped with contactors (KM1), fuses (FU1, FU2) and circuit breakers (QF2) to support off-grid operation and reduce battery consumption.

[0029] like Figure 3 Configuration instructions for the energy storage cabinet system topology diagram shown: 1) QF1: Configure a grid connection circuit breaker with current that meets the operating current and voltage requirements of the PCS; 2) QF2: Configure a protection access circuit breaker to ensure that the load can still draw power from the grid when the STS fails; 3) QF3: Configure the load connection circuit breaker to meet the load's operating voltage and current requirements; 4) STS: Configured with an intelligent static switching module to meet the requirements for seamless switching operation between the system and the network; 5) PCS: Configure grid-connected energy storage converters to meet the power requirements of battery systems and loads; 6) DC-DC: Configured with a battery access module to meet the voltage and current requirements of the energy storage battery system; 7) BES: Configure a battery system to meet the requirements for storing photovoltaic energy.

[0030] like Figure 3 As shown in the diagram, the energy storage system topology diagram shows that the energy storage system includes a battery system (BES, lithium battery PACK), a battery access module (1#DCDC, adapted to battery voltage 500V-1000V), and an energy storage converter (PCS, power 50kW-200kW), realizing energy storage and scheduling.

[0031] like Figure 4 The optical storage cabinet system topology configuration is shown below: 1) QF1~2: Configure grid connection circuit breakers, with current meeting the PCS operating current and voltage; 2) QF3: Configure a photovoltaic access circuit breaker to meet the access voltage and current requirements of the photovoltaic system; 3) MPPT: Configures photovoltaic access modules to meet the needs of photovoltaic systems; 4) DC-DC: Configured with a battery access module to meet the voltage and current requirements of the energy storage battery system; 5) PCS: Configure grid-connected energy storage converters to meet the power requirements of battery systems and loads; 6) BES: Configure a battery system to meet the requirements for storing photovoltaic energy.

[0032] like Figure 4 As shown in the diagram, the photovoltaic system includes a photovoltaic access module (MPPT) and a photovoltaic access circuit breaker (QF3). The MPPT optimizes photovoltaic power generation efficiency (e.g., input voltage 600V-1500V); the QF3 protects the photovoltaic access line.

[0033] This product features a separate design for the control power supply, enabling the system to charge electric vehicles even during a power outage.

[0034] like Figure 5 As shown, the control power supply uses a high-rate step-down DC-DC module to provide control power. The high-voltage part is directly connected to the energy storage battery for power and is equipped with high-breaking-capacity DC fuses, air circuit breakers and other protection devices. The auxiliary power supply is managed by the energy management system, which effectively reduces the loss of the control power supply to the battery and provides a safe and stable control power supply.

[0035] Traditional solutions typically draw control power from the AC side or use a UPS. If the control power is drawn from the AC side, it cannot be used in off-grid applications. If the control unit is taken from the UPS side, it can be used in off-grid applications, but this will increase costs. UPS batteries have short backup power time, and if they cannot start within the backup power time, it will cause the UPS to shut down due to excessive power consumption, thus affecting the application. In addition, UPS has high requirements for the working environment, which will greatly reduce the environmental applicability of the overall product.

[0036] like Figure 7 As shown, in order to ensure the reliability of the fire protection system under extreme conditions, the present invention is configured with both electric start and thermal start methods.

[0037] Electric start logic: When a fire occurs due to thermal runaway of the battery cell or short circuit of electronic components in the cabinet, the smoke detector will alarm and output a signal to activate the audible and visual alarm to notify personnel to take action; when both the smoke and heat detectors detect a fire and report the fire alarm, the detectors will output a signal to activate the audible and visual alarm, activate the fire extinguishing device, implement fire extinguishing, and simultaneously output a feedback signal to the EMS.

[0038] Thermal activation logic: When a fire occurs inside the cabinet, the open flame ignites the thermal wire, which then activates the aerosol generator in the fire extinguishing device to extinguish the fire and simultaneously outputs a feedback signal to the EMS.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pre-installed DC-coupled optical storage and charging integrated cabinet, characterized in that: It includes a photovoltaic system, an energy storage system, a charging system, and a power control system; the photovoltaic system, the energy storage system, and the charging system adopt a modular design and are integrated into a single cabinet, which achieves coordinated optimization between the systems through an energy management system; wherein: The photovoltaic system includes a photovoltaic access module and a photovoltaic access circuit breaker for connecting to photovoltaic power generation; The energy storage system includes a battery system, a battery access module, and a grid-connected energy storage converter, which is used to store photovoltaic energy and realize energy dispatch. The charging system includes a charging output module and a charging access circuit breaker, used to provide charging for electric vehicles; The power control system adopts a high-rate step-down DC-DC module, draws power directly from the energy storage battery, and is equipped with high-breaking-capacity DC fuses and air circuit breakers. It is controlled by the energy management system to reduce battery loss and support off-grid operation.

2. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 1, characterized in that: The integrated cabinet supports multiple application scenarios, including energy storage, photovoltaic storage, and photovoltaic storage charging, and can achieve multiple topological forms by configuring internal modules.

3. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 2, characterized in that: The integrated cabinet also includes a fire protection system, which has both electric start and thermal start modes. The electric starter detects the fire through smoke detectors and heat detectors, outputs signals to control the audible and visual alarms and activate the fire extinguishing device, and simultaneously feeds back signals to the energy management system. The thermal activation activates the aerosol generator through the combustion of the thermal wire to extinguish the fire, and then sends a feedback signal to the energy management system.

4. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 3, characterized in that: The internal layout of the integrated cabinet includes an electrical compartment on the left and a battery compartment on the right. The electrical compartment is equipped with power modules, photovoltaic MPPT modules, PCS, meters, surge protectors, miniature circuit breakers, and incoming molded case circuit breakers. The battery compartment is equipped with battery packs and a high-voltage box.

5. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 4, characterized in that: The topology of the power control system includes a high-voltage box contactor, a high-voltage box fuse, a power control fuse, and a power control circuit breaker to protect the battery charging and discharging circuit and the power control circuit.

6. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 2, characterized in that: The energy storage scenario topology includes a grid access circuit breaker, a protection access circuit breaker, a load access circuit breaker, an intelligent static switching module, a PCS, a battery access module, and a battery system to meet the requirements for seamless off-grid switching operation.

7. The pre-installed DC-coupled optical energy storage and charging integrated cabinet according to claim 6, characterized in that: The topology of the photovoltaic-storage scenario includes a grid access circuit breaker, a photovoltaic access circuit breaker, a photovoltaic access module, a battery access module, a PCS, and a battery system to meet the photovoltaic energy storage requirements.

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