Optical storage and charging outdoor integrated cabinet device

Abstract

The utility model discloses an optical storage and charging outdoor integrated cabinet device, which comprises a cabinet body, and a photovoltaic MPPT DC / DC module, a variable current bidirectional DC / AC module, a lithium battery cluster system, a charging pile module, a fire extinguishing system, a thermal management system, an energy management system EMS, a man-machine interaction display screen and an intelligent electric meter which are arranged in the cabinet body. According to the utility model, a system matrix composed of high-integration-level optical storage and charging outdoor integrated cabinet devices which are flexibly expanded in a simple building block building mode is adopted, so that market demands of application of different clients and project sites are realized, the cost of repeated installation is reduced, the debugging period is shortened, the operation and maintenance cost of users is reduced, and later-stage expansion of the users is facilitated; and differential application requirements in different application scenes can be met conveniently and flexibly.

Description

Technical Field

[0001] The utility model relates to the field of light storage and charging systems, and more specifically to an outdoor integrated light storage and charging cabinet device. Background Art

[0002] In today's society that advocates low-carbon travel, electric vehicles are gaining more and more favor from consumers, showing a broad prospect. As new energy vehicles become more and more popular, the development and charging demand of electric vehicles depend on the improvement of charging supporting facilities, while the construction of charging stations currently faces problems such as high-power electricity demand and insufficient distribution capacity, and the peak period of electricity consumption of charging stations overlapping with the peak period of electricity consumption of industrial and commercial loads.

[0003] For commercial buildings such as office buildings, shopping malls, airports, stations, hospitals, science and technology museums, museums, stadiums and other large buildings and various residential communities, when building charging piles and charging stations, they face problems such as high-power power demand and insufficient distribution capacity. Short-term charging energy buffering is extremely necessary. Currently, a feasible solution is an integrated photovoltaic storage and charging device.

[0004] The integrated photovoltaic storage and charging device is mainly combined with the characteristics of the building and energy demand, and is equipped with a storage system of a certain capacity to form a grid-connected photovoltaic storage and charging system. The problem of insufficient regional distribution capacity can be solved by using the low-peak electricity price at night for energy storage. During the charging peak period, the charging piles can be powered by energy storage to meet the peak electricity demand, which not only achieves peak shaving and valley filling, but also saves the cost of increasing distribution capacity.

[0005] At present, most photovoltaic storage and charging systems use split photovoltaic inverter systems, combined with energy storage systems and ready-made charging pile systems. Most of them are implemented by integrated manufacturers integrating photovoltaic energy storage inverters, lithium battery energy storage systems, and charging piles of different brands into customized development projects. This approach has the following disadvantages:

[0006] (1) Multiple installations and high installation costs: When using split equipment to form a system, the integrator needs to coordinate installation services in batches for equipment from different manufacturers. However, it is difficult to unify the arrival and installation time of different manufacturers, resulting in a long installation time for the overall system, multiple installations are required, and the efficiency is relatively low.

[0007] (2) Multiple debugging and testing, high degree of system customization: Since the system is composed of split equipment, the equipment may be products of the same manufacturer or different manufacturers. After a single device is installed, it needs to be debugged separately. After each independent device is installed and after all devices are installed, single-machine and system joint debugging is required. The workload of this joint debugging is huge, which seriously affects the efficiency of debugging and testing.

[0008] (3) High degree of customization, unable to quickly copy and import batch projects into the market for application: This multi-device split project integration method requires multiple installations, debugging, and testing in stages and steps, and customized system solutions and energy management EMS strategies are carried out according to the different conditions of different project sites. Therefore, customization is required according to different customers and project site conditions, and standardized projects cannot be quickly copied and imported into the market for application.

[0009] (6) It is inconvenient to upgrade and expand the system in the later stage: Due to the adoption of a customized solution for split equipment group system projects, the project site needs to upgrade the battery capacity, expand the inverter power, increase the photovoltaic power, increase the charging pile power and the supporting charging interface. All of these need to be re-customized, re-adjusted, upgraded and re-developed for the new scenarios. It is not possible to directly adopt a simple building block approach for flexible expansion.

[0010] (7) Inconvenient operation and maintenance: Due to the adoption of this integrated solution for multi-device group systems, the adaptation between equipment from different manufacturers requires a long period of time. In addition, equipment from different manufacturers needs to be dealt with by after-sales operation and maintenance from different manufacturers, which brings huge challenges to the operation and maintenance of the overall system.

[0011] In view of the above disadvantages, the use of this split-type multi-device solar storage and charging system has different degrees of pain points in system installation, system debugging, operation and maintenance, and later expansion.

[0012] Therefore, there is a need for an outdoor photovoltaic storage and charging cabinet with integrated installation, integrated debugging, and integrated operation and maintenance. A system matrix composed of highly integrated outdoor photovoltaic storage and charging cabinet devices that can be flexibly expanded in a simple "building blocks" manner can be used to meet the market needs of applications for different customers and project sites, reduce multiple installation costs, reduce debugging cycles, reduce user operation and maintenance costs, and facilitate user expansion in the future. It is convenient and flexible to use to meet differentiated application needs in different application scenarios. Utility Model Content

[0013] The purpose of the utility model is to provide an outdoor integrated photovoltaic storage and charging cabinet device to overcome the above-mentioned defects in the prior art.

[0014] The technical solution to achieve the purpose of the utility model is: an outdoor integrated photovoltaic storage and charging cabinet device, including a cabinet body, and a photovoltaic MPPT DC / DC module, a current conversion bidirectional DC / AC module, a lithium battery cluster system, a charging pile module, a fire protection system, a thermal management system, an energy management system EMS, a human-computer interaction display screen and a smart meter arranged inside the cabinet body.

[0015] Preferably, the DC / DC module and the current conversion bidirectional DC / AC module of the photovoltaic MPPT are electrically connected to the lithium battery cluster system, respectively, and the current conversion bidirectional DC / AC module and the lithium battery cluster system are electrically connected to the charging pile module, respectively; the DC / DC module of the photovoltaic MPPT, the current conversion bidirectional DC / AC module, the lithium battery cluster system, the charging pile module, the fire protection system, the thermal management system, the human-computer interaction display screen and the smart meter are communicatively connected to the energy management system EMS through a communication link.

[0016] Preferably, the DC / DC module of the photovoltaic MPPT is connected to a photovoltaic input PV input interface, and the photovoltaic input PV input interface is connected to a photovoltaic matrix formed by a series of photovoltaic panels of the system. A DC circuit breaker is arranged between the photovoltaic input PV input interface and the DC / DC module of the photovoltaic MPPT for switching on and off the photovoltaic output and maintenance.

[0017] Preferably, the bidirectional DC / AC module is provided with a static transfer switch STS module, and the external electrical interfaces include a grid interface, a grid-connected output load interface, and an off-grid output emergency power interface EPS interface;

[0018] One end of the static transfer switch STS module is electrically connected to the grid interface and the bidirectional DC / AC module respectively, and the other end is electrically connected to the grid-connected output load Load interface and the off-grid output emergency power interface EPS interface respectively. The static transfer switch STS module is communicatively connected to the energy management system EMS.

[0019] Preferably, the lithium battery cluster system is composed of battery cells connected in series to form a battery PACK, which is then connected in series with a high-voltage box and a battery management system BMS. DC circuit breakers and DC isolating switches are arranged between the battery PACKs of the lithium battery cluster system. The battery PACKs of the lithium battery cluster system are also provided with a thermal management system and an aerosol fire extinguishing system.

[0020] Preferably, the charging pile module includes a charging pile main control board, and a DC / DC rectifier module, a current metering module, an insulation detection module, a DC loop control and protection module, an output power switching module and a DC charging gun electrically connected to the charging pile main control board, and the charging pile module is provided with no less than one DC charging gun.

[0021] Preferably, the fire protection system includes a fire protection controller, and a detector, an electromagnetic control valve, a fire extinguishing device and a pressure device electrically connected to the fire protection controller; the fire protection controller of the fire protection system is communicatively connected to the aerosol fire extinguishing system of the lithium battery cluster system.

[0022] Preferably, the thermal management system includes a cabinet, a DC / DC module of a photovoltaic MPPT, a bidirectional DC / AC module, a lithium battery cluster system, and a temperature detection device and a cooling device for a charging pile module.

[0023] Preferably, the energy management system EMS is configured to include an Ethernet interface, a CAN-bus interface, an RS485 interface, a LVDS interface, an ADC interface, a dry node, a wet node, a passive relay output interface, and a high and low side output interface.

[0024] Preferably, the energy management system EMS is provided with a wireless WIFI / GRPRS communication expansion module.

[0025] Preferably, the human-computer interactive display screen is used to display the operating status of the DC / DC module of the photovoltaic MPPT, the bidirectional DC / AC module, the lithium battery cluster system, the charging pile module, the fire protection system, the thermal management system, the smart meter and the static transfer switch STS module.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] (1) The utility model is an outdoor integrated photovoltaic storage and charging cabinet device, which adopts a modular design of the system core functional modules. Users can flexibly select photovoltaic MPPT modules, charging pile modules, static transfer switch STS modules according to actual conditions, and expand the capacity of the lithium battery cluster system to meet different scene applications and capacity requirements.

[0028] (2) The utility model only needs to be installed once, without the need for multiple on-site installations, thus simplifying the installation time, reducing the assembly time, improving the installation efficiency, and significantly reducing the installation cost.

[0029] (3) The utility model only needs to be debugged and put into operation once the overall system is installed, thereby improving the debugging efficiency and enhancing the user experience.

[0030] (4) The present invention adopts a standardized design and does not need to be customized according to customer applications. In order to meet the requirements of different scenarios for power, charging power, and the number of charging guns, a flexible "building block" method can be used to combine and meet the needs of users in different scenarios. In engineering applications, it can be standardized and simplified for flexible and dynamic expansion.

[0031] (5) The utility model adopts a DC / DC charging pile module internally, which realizes efficient DC to DC charging, photovoltaic power generation, grid power extraction, and internal DC coupling of energy storage power supply, breaking through the power capacity limitation of the application site, and can dynamically allocate the power of the charging pile, as well as realize application scenarios such as multiple cars charging with one device at the same time and dynamically allocating a certain charging gun for high-power charging, which greatly shortens the charging time of electric cars, meets the needs of rapid charging of multiple cars at the same time, improves the convenience of charging for users, and ensures charging efficiency.

[0032] (6) Since the utility model is an integrated and highly integrated device that has undergone long-term reliability testing and verification, it avoids the adaptation, running-in and joint debugging problems between different split sub-equipment subsystems. The use of this highly integrated outdoor integrated cabinet device can be uniformly maintained through a unified after-sales operation and maintenance window, greatly improving the operation and maintenance efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of an outdoor integrated photovoltaic storage and charging cabinet device of the utility model.

[0035] Figure 2 This is a schematic diagram of the electrical connection of an outdoor integrated photovoltaic storage and charging cabinet device of the utility model.

[0036] Figure 3 This is a schematic diagram of the energy management system connection of an outdoor integrated photovoltaic storage and charging cabinet device of the utility model.

[0037] The numbers in the attached figure are: 1. DC / DC module of photovoltaic MPPT; 2. bidirectional DC / AC module; 3. lithium battery cluster system; 4. charging pile module; 5. fire protection system; 6. thermal management system; 7. energy management system EMS; 8. human-computer interaction display screen; 9. photovoltaic input PV input interface; 10. smart meter; 11. grid interface; 12. static transfer switch STS; 13. grid-connected output load Load interface; 14. off-grid output emergency backup power EPS interface; 15. DC charging gun. DETAILED DESCRIPTION

[0038] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0043] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the scope of protection of the utility model.

[0044] Example:

[0045] In this embodiment, an outdoor integrated photovoltaic storage and charging cabinet device is configured with a photovoltaic rated power of 50kW; a bidirectional converter rated power of 100kW; a lithium battery cluster system of 232kWh system; a charging pile module of 120kW with 4 charging guns; the fire protection system adopts a module aerosol and cabinet perfluorohexanone, a temperature sensor, a smoke sensor and a fire controller to form an intelligent fire protection system; the thermal management system adopts a liquid cooling mechanism with a liquid cooling plate solution; the static transfer switch STS uses a grid-connected and off-grid transfer switch with a rated power of 100kW to illustrate.

[0046] like Figure 1 and Figure 2 The outdoor integrated photovoltaic storage and charging cabinet device of this embodiment includes an energy management system EMS7, and a photovoltaic MPPT DC / DC module 1, a bidirectional DC / AC module 2, a lithium battery cluster system 3, a charging pile module 4, a fire protection system 5, a thermal management system 6, a human-computer interaction display screen 8 and a smart meter 10 that are communicatively connected to the energy management system EMS7; the photovoltaic MPPT DC / DC module 1 is provided with a photovoltaic input PV input interface 9, and is electrically connected to the photovoltaic component through the photovoltaic input PV input interface 9; the bidirectional DC / AC module 2 is provided with a grid interface 11, and is electrically connected to the grid through the grid interface 11; the photovoltaic MPPT DC / DC module 1 and the bidirectional DC / AC module 2 are electrically connected to the lithium battery cluster system 3 respectively, and the bidirectional DC / AC module 2 and the lithium battery cluster system 3 are electrically connected to the charging pile module 4 respectively; the energy management system EMS7 performs energy management scheduling according to the real-time charging and discharging power of each module.

[0047] In this embodiment, the photovoltaic matrix composed of photovoltaic panels is electrically connected to the single channel of the photovoltaic input PV input interface 9PV+ and PV-, the grid interface Grid 11, the off-grid output emergency power EPS interface 14 and the grid-connected output load Load interface 13 L1, L2, L3, N, PE are connected to the static transfer switch STS module 12, the grid power supply type is three-phase 3W+N+PE, 380V L1, L2, L3, N, PE electrical wiring, the grid output load Load interface 13 L1, L2, L3, N are electrically connected to the single-phase or three-phase load, the off-grid output emergency power EPS interface 14 L1, L2, L3, N are electrically connected to the off-grid single-phase or three-phase load, the DC charging gun 15 is electrically connected to the charging port of the new energy vehicle, and the lithium battery battery cluster The internal DC electrical end of the system 3 is electrically connected to the DC output end of the DC / DC module 1 of the photovoltaic MPPT, the DC end of the bidirectional DC / AC module 2, and the DC / DC module input end inside the charging pile module 3. The human-machine interactive display screen 8 is a common touch screen. The energy management system EMS7 is connected to the above photovoltaic MPPT DC / DC module 1, bidirectional DC / AC module 2, lithium battery battery cluster system 3, charging pile module 4, fire protection system 5, thermal management system 6, human-machine interactive display screen 8, smart meter 10, static transfer switch STS12 and other equipment through communication interfaces and dry contacts to form an intelligent main control unit of the overall system. The above electrical and communication architecture is used to build a practical application platform for the overall outdoor integrated cabinet device.

[0048] In this embodiment, the parameters of the DC / DC module 1 of the photovoltaic MPPT in the outdoor integrated photovoltaic storage and charging cabinet device are: rated power 50kW, MPPT voltage range DC200V~700V, MPPT full power voltage range DC370V~DC700V, MPPT number of channels is 1, and the single-channel rated current is 135A.

[0049] In this embodiment, the photovoltaic input PV input interface 9 in the outdoor integrated photovoltaic storage and charging cabinet device has a MPPT interface. The MPPT is composed of photovoltaic panels in series to form a photovoltaic matrix connected to the PV input interfaces PV+ and PV-. The photovoltaic input of the MPPT has a photovoltaic DC SWITCH switch for disconnecting the photovoltaic access.

[0050] In this embodiment, the bidirectional DC / AC module 2 in the outdoor integrated photovoltaic storage and charging cabinet device has grid-connected AC parameters as follows: rated output power of 100kW, maximum output power of 110kW, rated grid voltage of 3W+N+PE, AC380V, grid voltage range of -15% to +10%, rated grid frequency of 50 / 60Hz, total current waveform distortion rate of <3% (at rated power), DC component of <0.5%In, power factor adjustable range of 1 (leading) to 1 (lagging), overload capacity of 105% for continuous operation, 105% to 120% for operation for 10min, and 120% for stopping operation; its off-grid AC parameters are rated output power of 100kW, maximum output power of 110kW, rated grid voltage of 3W+N+PE, AC380V, total voltage waveform distortion rate of <3% (linear load), rated frequency of 50 / 60Hz, overload capacity of 105% for continuous operation, 105% to 120% for operation for 10min, and 120% for stopping operation.

[0051] In this embodiment, the lithium battery cluster system 3 in the outdoor integrated photovoltaic storage and charging cabinet device adopts 280AH LiFePO4 lithium iron phosphate battery cells, and the liquid cooling PACK adopts a 166.4V&46.592kWh battery PACK module composed of 52 battery cells 1P52S in series. The battery cluster is composed of 5 liquid cooling battery PACK modules in series combined with high voltage and battery management system BMS to form a 232kWh lithium battery cluster system. The overall battery cluster DC high voltage rated voltage is 832Vdc, the maximum charge and discharge current is 140Adc, the protection level is IP67, and its output is PACK+, PACK-, 2 CAN communications and one dry contact to communicate and interact with the inverter bidirectional DC / AC module and the energy management system EMS.

[0052] In this embodiment, the charging pile module 4 inside the outdoor integrated cabinet device of solar storage and charging is a 120kW charging pile with 4 guns, a charging pile main control board, a DC / DC rectifier module, a current metering module, an insulation detection module, a DC loop control and protection module, an output power switching module, 4 DC charging guns, etc. The overall system can be regulated by the energy management system EMS. The output power switching module inside the charging pile can realize the function of 4 DC charging guns charging 4 new energy vehicles at the same time, as well as the function of scheduled charging. The power distribution of the charging pile module can also dynamically allocate the charging power on different charging interfaces according to the working conditions of the overall system, and dynamically allocate the power of the 4 charging guns according to the charging needs to meet the fast charging function of one or several guns.

[0053] In this embodiment, the DC charging gun 15 in the outdoor integrated cabinet device for solar storage and charging is a DC fast charging gun interface, which corresponds to the DC fast charging socket on the vehicle side. Its terminals are defined as DC+, DC-, A+, A-, PE, S+, S-, CC1, and CC2, where DC+ / DC- is the positive and negative electrodes of the high-voltage DC 500V voltage platform for connecting to the battery on the vehicle side, PE is the vehicle body ground wire, A+, A- are the 12V auxiliary power supply interfaces provided by the charging head of the integrated device, S+, S- are the communication ports for CANH, CANL to communicate with the vehicle-side BMS, CC1 is the signal confirmation wiring for the integrated device to determine a reliable connection with the vehicle BMS, and CC2 is the signal confirmation wiring for the vehicle BMS to confirm that the integrated device is reliably connected. In this way, the integrated device can interact with the vehicle for charging and discharging.

[0054] In this embodiment, the fire protection system 5 in the outdoor integrated cabinet device for light storage and charging adopts a module aerosol and cabinet perfluorohexanone, and is equipped with a temperature sensor, a smoke sensor and a fire controller to form an intelligent fire protection system. The configuration is that a set of 60g 4-nozzle aerosol is installed in each liquid-cooled PACK, and a 2L capacity perfluorohexanone fire extinguishing medium is installed inside the outdoor integrated cabinet. The filling pressure (nitrogen) is 2.5MPa, and the weight of the perfluorohexanone agent is 1.6kg. The fire extinguishing system, at the same time, is equipped with a temperature sensor, a smoke sensor and a fire controller in the cabinet. The fire protection system has a two-level control logic. The first level is that the fire alarm does not trigger fire extinguishing, but only stops charging and discharging in the outdoor integrated cabinet. The second level is the delayed spraying of the fire extinguishing medium to achieve the fire extinguishing protection effect.

[0055] In this embodiment, the thermal management system 6 in the outdoor integrated photovoltaic storage and charging cabinet device adopts a liquid cooling machine system. The inlet and outlet water pipes of the liquid cooling machine are combined with the PACK liquid cooling pipes and liquid cooling plates in the lithium battery cluster system 3 to realize an overall thermal management system that is organically and efficiently combined with the DC / DC module liquid cooling plate, the bidirectional DC / AC module liquid cooling plate, and the charging pile module liquid cooling plate of the photovoltaic MPPT, so as to achieve consistent temperature control of the entire system and ensure that the entire system operates within a reasonable temperature range.

[0056] In this embodiment, the energy management system EMS7 in the outdoor integrated photovoltaic storage and charging cabinet device has an Ethernet interface, such as Figure 3As shown, CAN-bus interface, RS485 interface, LVDS interface, ADC interface, dry node, wet node, passive relay output, active high and low side output and other interface functions, the energy management system EMS is used to connect the external communication interface of the DC / DC module 1 of the photovoltaic MPPT in the outdoor integrated cabinet through the RS485 interface, connect the external network interface of the bidirectional DC / AC module 2 through the Ethernet interface, connect the battery management system BMS in the lithium battery battery cluster system 3 through the CAN-bus interface, connect the external communication interface of the charging pile module 4 through the RS485 interface, connect the external interface of the fire controller in the fire protection system 5 through the RS485 interface, connect the external communication interface of the liquid cooler in the thermal management system 6 through the RS485 interface, connect the 10-inch resistive screen for human-computer interaction display screen 8 through the LVDS interface, connect the external communication interface of the smart meter 10 through the RS485 interface, and connect the external communication interface of the smart meter 10 through the CAN-bus interface. The s interface is connected to the external communication interface of the static transfer switch STS12, and the MinPCIe interface is used in conjunction with the wireless expansion 4G / WIFI module to realize the cloud server communication link. The energy management system EMS7 software realizes the coordination of these core modules or sub-devices in the integrated cabinet to obtain the DC / DC module power generation power of the photovoltaic MPPT of the integrated device, the charging and discharging status of the DC / AC module of the converter, the grid power status obtained through the meter, the load power consumption of the grid-connected and off-grid ends of the static transfer switch STS12, the status of the lithium battery battery cluster system 3 through the battery management system, and the real-time charging power through the charging pile module 4. This information is combined with the energy management system mode to perform energy management scheduling, and combined with the system working modes in the integrated cabinet, such as self-generation and self-use, peak shaving and valley filling, scheduled charging and discharging of batteries, appointment for charging of cars, and dynamic allocation of charging power of charging guns to meet the application needs of different scenarios.

[0057] In summary, the utility model proposes an outdoor integrated photovoltaic storage and charging cabinet device, which only requires the outdoor integrated cabinet to be transported and installed as a whole to the project site. The installer only needs to electrically connect the electrical connection interface of the integrated cabinet device with the grid, the grid-connected and off-grid loads, the photovoltaic PV, and the charging pile interface (with the charging line reserved between the vehicle). After the working mode of the energy management system EMS is set through the human-computer interaction screen, the application environment of a single system can be quickly and efficiently built. If a single system cannot meet the application requirements of customers and sites, more than two outdoor integrated photovoltaic storage and charging cabinet devices can be configured in parallel on the AC side to adopt this "building blocks" mode to build The multi-machine system matrix system adopts this integrated cabinet device. The photovoltaic storage and charging device has integrated installation, integrated debugging, integrated operation and maintenance, convenient and flexible expansion, and standardized engineering replication application to realize user-side industrial and commercial photovoltaic storage and charging applications, such as old residential areas, campuses, hospitals, commercial entities, industrial parks and other places. The integrated photovoltaic storage and charging application solves the pain point problem of insufficient regional distribution capacity during peak power consumption and requires multiple charging guns to charge at the same time. This integrated cabinet device is used in a single unit and "building blocks" expansion method to meet the industrial and commercial user-side photovoltaic storage and charging integration. When the regional peak power demand capacity is insufficient, it can not only achieve peak shaving and valley filling, but also save the distribution capacity expansion cost.

[0058] At the same time, by adopting this outdoor integrated photovoltaic storage and charging cabinet device, the cost of multiple installations is reduced, the debugging cycle is reduced, the operation and maintenance costs of the owner users are reduced, and flexible expansion in the future is facilitated. Customers can use energy flexibly and conveniently, which greatly improves the installation, debugging, and operation and maintenance efficiency, and simultaneously improves the user experience.

[0059] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An outdoor integrated solar storage and charging cabinet device, characterized by: The invention comprises a cabinet (100), and a photovoltaic MPPT DC / DC module (1), a current conversion bidirectional DC / AC module (2), a lithium battery cluster system (3), a charging pile module (4), a fire protection system (5), a thermal management system (6), an energy management system EMS (7), a human-machine interactive display screen (8), and a smart electric meter (10) arranged inside the cabinet (100); The DC / DC module (1) and the bidirectional DC / AC module (2) of the photovoltaic MPPT are respectively electrically connected to the lithium battery battery cluster system (3), and the bidirectional DC / AC module (2) and the lithium battery battery cluster system (3) are respectively electrically connected to the charging pile module (4); the DC / DC module (1) of the photovoltaic MPPT, the bidirectional DC / AC module (2), the lithium battery battery cluster system (3), the charging pile module (4), the fire protection system (5), the thermal management system (6), the human-machine interactive display screen (8) and the smart meter (10) are connected to the energy management system EMS (7) through a communication link.

2. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The photovoltaic MPPT DC / DC module (1) is connected to a photovoltaic input PV input interface (9), and the photovoltaic input PV input interface (9) is connected to a photovoltaic panel string of a system to form a photovoltaic matrix. A DC circuit breaker is provided between the photovoltaic input PV input interface (9) and the photovoltaic MPPT DC / DC module (1) for switching on and off photovoltaic output and maintenance.

3. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The current conversion bidirectional DC / AC module (2) is provided with a static transfer switch STS module (12), and external electrical interfaces include a grid interface (11), a grid-connected output load interface (13), and an off-grid output emergency power interface EPS interface (14); One end of the static transfer switch STS module (12) is electrically connected to the grid interface (11) and the bidirectional DC / AC module (2), respectively, and the other end is electrically connected to the grid-connected output load interface (13) and the off-grid output emergency power interface EPS interface (14), respectively. The static transfer switch STS module (12) is communicatively connected to the energy management system EMS (7).

4. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The lithium battery cluster system (3) comprises battery cells connected in series to form a battery PACK, which is then connected in series with a high-voltage box and a battery management system BMS. A DC circuit breaker and a DC isolating switch are provided between the battery PACKs of the lithium battery cluster system (3). The battery PACKs of the lithium battery cluster system (3) are also provided with a thermal management system and an aerosol fire extinguishing system.

5. The outdoor integrated solar storage and charging cabinet device according to claim 1 is characterized in that: The charging pile module (4) comprises a charging pile main control board, and a DC / DC rectifier module, a current metering module, an insulation detection module, a DC loop control and protection module, an output power switching module and a DC charging gun (15) electrically connected to the charging pile main control board. The charging pile module (4) is provided with no less than one DC charging gun (15).

6. The outdoor integrated solar storage and charging cabinet device according to claim 4 is characterized in that: The fire protection system (5) comprises a fire protection controller, and a detector, an electromagnetic control valve, a fire extinguishing device and a pressure device electrically connected to the fire protection controller; the fire protection controller of the fire protection system (5) is communicatively connected to the aerosol fire extinguishing system of the lithium battery cluster system (3).

7. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The thermal management system (6) comprises a cabinet (100), a photovoltaic MPPT DC / DC module (1), a current conversion bidirectional DC / AC module (2), a lithium battery cluster system (3) and a temperature detection device and a cooling device for a charging pile module (4).

8. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The energy management system EMS (7) is provided with an Ethernet interface, a CAN-bus interface, an RS485 interface, an LVDS interface, an ADC interface, a dry node, a wet node, a passive relay output interface, and a high-side and low-side output interface.

9. The outdoor integrated solar storage and charging cabinet device according to claim 1, characterized in that: The energy management system EMS (7) is provided with a wireless WIFI / GRPRS communication expansion module.

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