Container type photovoltaic energy storage system

Abstract

The utility model discloses a container type photovoltaic energy storage system, and relates to the technical field of photovoltaic energy storage. The energy storage system comprises a container body, a photovoltaic assembly, a battery cluster and an EMS energy management system, the interior of the container body is divided into an inverter bin and a battery bin, an energy storage converter, a photovoltaic controller and a confluence and control cabinet are arranged in the inverter bin, an isolation transformer is arranged at the output end of the energy storage converter, and the battery cluster is arranged in the battery bin; a fire fighting system and a constant temperature system are arranged on the container body, the fire fighting system comprises a fire fighting host, a smoke alarm and a fire fighting gas cylinder, the fire fighting host is arranged on the side wall of the inverter bin, the smoke alarm is arranged in the battery bin, the fire fighting gas cylinder is arranged in the inverter bin, and the fire fighting gas cylinder is connected with a fire fighting pipeline leading to the battery bin; the air conditioner is installed on the side wall of the battery bin. The energy storage system reasonably utilizes the space of the container body, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic energy storage, in particular to a containerized photovoltaic energy storage system. Background Art

[0002] The containerized photovoltaic energy storage system is a backup power source, mainly used in industry and commerce. It generates electricity through solar energy and stores excess electricity, reducing the company's dependence on traditional power grids and reducing electricity bills. It can also release stored electricity during peak electricity price periods, achieving peak shaving and valley filling, further reducing energy costs. Chinese patent document CN210327499U discloses a containerized photovoltaic energy storage system, which includes a box body, which has an equipment compartment and a battery compartment. The equipment compartment is provided with a bypass cabinet, an energy storage machine and a junction cabinet, and the battery compartment is provided with a battery module; it also includes a fire handling system and a second heat dissipation system, wherein the automatic fire extinguishing cabinet of the fire handling system is installed near the battery module in the battery compartment. Since the fire cylinder in the automatic fire extinguishing cabinet is filled with high-pressure gas for fire extinguishing, when the fire in the battery compartment cannot be extinguished in time, the fire cylinder is exposed to a high temperature environment, and the gas in the cylinder expands due to heat, posing safety hazards such as explosion; and since the automatic fire extinguishing cabinet and the air conditioner are both arranged in the battery compartment, they will occupy the space in the battery compartment for placing the battery module, reducing the number of energy storage batteries placed, thereby reducing the amount of electrical energy stored in the energy storage system. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a container-type photovoltaic energy storage system, in which the fire-fighting gas cylinder is arranged in the inverter compartment, and the air conditioner is installed on the side wall of the battery compartment, so as to reasonably utilize the space of the container body and improve safety.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A containerized photovoltaic energy storage system comprises a container body, photovoltaic modules, a battery cluster and an EMS energy management system. The container body is divided into an inverter compartment and a battery compartment. The inverter compartment is provided with an energy storage converter, a photovoltaic controller and a convergence and control cabinet. An isolation transformer is provided at the output end of the energy storage converter. The battery cluster is arranged in the battery compartment. A fire protection system and a constant temperature system are arranged on the container body. The fire protection system comprises a fire protection host, a smoke alarm and a fire protection gas cylinder. The fire protection host is arranged on the side wall of the inverter compartment, the smoke alarm is arranged on the battery compartment, the fire protection gas cylinder is arranged on the inverter compartment, and the fire protection gas cylinder is connected to a fire protection pipeline leading to the battery compartment. The constant temperature system comprises an air conditioner installed on the side wall of the battery compartment.

[0006] As a further elaboration of the above technical solution:

[0007] The photovoltaic module is electrically connected to the battery cluster through the photovoltaic controller, the battery cluster is electrically connected to the power grid or load through the energy storage inverter, and the combiner in the combiner and control cabinet is electrically connected to the photovoltaic module.

[0008] The fire protection system also includes a gas release alarm light, an alarm bell and an emergency switch arranged on the side wall of the inverter compartment. The gas release alarm light and the alarm bell are electrically connected to the fire protection host, and the emergency switch is electrically connected to the battery cluster.

[0009] The battery cluster includes multiple single lithium batteries, a BMS battery management system and a battery rack. The multiple single lithium batteries are connected in series and electrically connected to the BMS battery management system. The battery rack is used to place the multiple single lithium batteries.

[0010] The BMS battery management system includes the BMU battery management unit, BCMU battery pack management unit and BAMS battery cluster management system.

[0011] The side walls of the inverter compartment are also provided with air inlet shutters and air outlets, and the air outlets are provided with rain covers.

[0012] A pressure relief valve is provided on the side wall of the battery compartment.

[0013] There are LED ceiling lights on the top of the inverter compartment and battery compartment.

[0014] The fire-fighting gas cylinder uses a heptafluoropropane fire-extinguishing gas cylinder.

[0015] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0016] The fire fighting system of the utility model comprises a fire fighting host, a smoke alarm and a fire fighting gas cylinder. The fire fighting host is arranged on the side wall of the inverter compartment, the smoke alarm is arranged on the battery compartment, the fire fighting gas cylinder is arranged on the inverter compartment, and the fire fighting gas cylinder is connected with a fire fighting pipe leading to the battery compartment. When the smoke alarm detects that the smoke concentration in the battery compartment exceeds the set threshold value, the fire alarm signal is sent to the fire fighting host, and the fire fighting host controls the solenoid valve to be energized, opens the valve of the fire fighting gas cylinder, and allows the gas to enter the battery compartment through the fire fighting pipe to realize fire extinguishing. Compared with the prior art, the fire extinguishing cabinet is directly installed in the battery compartment, thereby eliminating the safety hazard of the fire fighting gas cylinder; the fire fighting gas cylinder is arranged in the inverter compartment, and the air conditioner is installed on the side wall of the battery compartment to avoid occupying the storage space of the battery compartment. The space of the container body is reasonably utilized, and the number of battery clusters accommodated is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a stereogram of this embodiment;

[0018] Figure 2 It is a left side view of this embodiment;

[0019] Figure 3 It is a partial structural connection block diagram of this embodiment.

[0020] The numbers in the figure are: 1. Container body; 11. Inverter compartment; 12. Battery compartment; 2. Photovoltaic module; 3. Energy storage converter; 4. Photovoltaic controller; 5. Convergence and control cabinet; 6. Battery cluster; 61. Battery rack; 71. Fire host; 72. Smoke alarm; 73. Fire cylinder; 731. Fire pipeline; 74. Gas release alarm light; 75. Alarm; 76. Emergency switch; 8. Constant temperature system; 81. Air conditioning; 9. Air inlet shutter; 10. Rain cover; 20. Pressure relief valve; 30. LED ceiling lamp; 40. EMS energy management system. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, or it can include the first and second features not being in direct contact but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] like Figures 1 to 3As shown, in one embodiment of the utility model, the container-type energy storage system includes a container body 1, a photovoltaic module 2, a battery cluster 6 and an EMS energy management system 40. The container body 1 is divided into an inverter compartment 11 and a battery compartment 12. The side walls of the inverter compartment 11 and the battery compartment 12 are provided with multiple compartment doors. The inverter compartment 11 is provided with an energy storage inverter 3, a photovoltaic controller 4 and a bus and control cabinet 5. The output end of the energy storage inverter 3 is provided with an isolation transformer 6, and the battery cluster 6 is arranged in the battery compartment 12; A fire-fighting system and a constant temperature system 8 are provided on the enclosure 1. The fire-fighting system includes a fire-fighting host 71, a smoke alarm 72 and a fire-fighting gas cylinder 73. The fire-fighting host 71 is arranged on the side wall of the inverter compartment 11, the smoke alarm 72 is arranged on the battery compartment 12, the fire-fighting gas cylinder 73 is arranged on the inverter compartment 11, and the fire-fighting gas cylinder 73 is connected to a fire-fighting pipe 731 leading to the battery compartment 12. Optionally, the fire-fighting gas cylinder 73 adopts a heptafluoropropane fire-extinguishing gas cylinder; the constant temperature system 8 includes an air conditioner 81, and the air conditioner 81 is installed on the side wall of the battery compartment 12. When the smoke alarm 72 detects that the smoke concentration in the battery compartment 12 exceeds the set threshold, it sends a fire alarm signal to the fire host 71. The fire host 71 controls the solenoid valve to energize, opens the valve of the fire cylinder 73 to release HFC-227ea gas, and the HFC-227ea gas enters the battery compartment 12 through the fire pipe 731 to extinguish the fire. Compared with directly installing the fire extinguisher in the battery compartment 12, safety hazards can be eliminated. The fire cylinder 73 is arranged in the inverter compartment 11, and the air conditioner 81 is installed on the side wall of the battery compartment 12 to avoid occupying the storage space of the battery compartment 12. The space of the container body 1 is reasonably utilized, and the number of battery clusters 6 accommodated is increased.

[0024] The photovoltaic module 2 is electrically connected to the battery cluster 6 through the photovoltaic controller 4, and the battery cluster 6 is electrically connected to the power grid or the load through the energy storage inverter 3; the photovoltaic controller 4 is used to intelligently manage and control the battery cluster 6, monitor and control the voltage and current of the battery cluster 6, and manage charging and discharging. The photovoltaic controller 4 is equipped with an MPPT (maximum power point tracking) module, which can adjust the working voltage and current of the photovoltaic module 2 in real time to keep it near the maximum power point at all times, thereby maximizing the conversion of solar energy into electrical energy and improving the power generation efficiency of the photovoltaic module 2; the energy storage inverter 3 is used to convert the direct current (DC) generated by the photovoltaic module 2 into alternating current (AC) to supply the mains or load. When the electrical energy generated by the photovoltaic module 2 exceeds the demand, the excess electrical energy can also be stored in the battery cluster 6 as a backup The energy storage inverter 3 is provided with an isolation transformer, which can isolate the electrical connection between the battery cluster 6 and the mains or the load end, and prevent surge from causing dangerous impacts on the user and the electrical equipment itself when electrical equipment and electronic circuits fail, while providing the required voltage conversion function; the combiner in the combiner and control cabinet 5 is electrically connected to the photovoltaic module 2, and the combiner is used to aggregate the DC current generated by multiple photovoltaic modules 2 and transmit it to the energy storage inverter 3 or the battery cluster 6, and the control machine is used to monitor and control various equipment in the energy storage system; the EMS energy management system 40 can monitor the status and working conditions of various equipment in real time, and by collecting and analyzing data such as voltage, current and power, it can judge the working status and performance of the system, and manage and optimize the energy flow in the energy storage system.

[0025] The battery cluster 6 includes multiple single lithium batteries, a BMS battery management system and a battery rack 61. The multiple single lithium batteries are connected in series and electrically connected to the BMS battery management system. The BMS battery management system is used to perform real-time monitoring and intelligent management of the lithium batteries. The battery rack 61 is used to place multiple single lithium batteries. The BMS battery management system adopts a three-level architecture management system, which includes a BMU battery management unit, a BCMU battery pack management unit and a BAMS battery cluster management system. The three-level architecture management system can effectively manage multi-level battery packs, and has over-current protection, over-voltage multi-level alarms, and a self-protection mechanism, which effectively protects the safety of the battery cluster 6.

[0026] In some embodiments of the utility model, the fire protection system further includes a gas release alarm light 74, an alarm bell 75 and an emergency switch 76 arranged on the side wall of the inverter compartment 11, the gas release alarm light 74 and the alarm bell 75 are electrically connected to the fire host 71, and the emergency switch 76 is electrically connected to the battery cluster 6; the side wall of the battery compartment 12 is provided with a pressure relief valve 20. When a fire occurs, the fire host 71 controls the gas release alarm light 74 and the alarm bell 75 to work, the gas release alarm light 74 reminds the staff that HFC-227ea gas is being released in the battery compartment 12, and the alarm bell 75 sounds an alarm; the pressure relief valve 20 automatically opens when the pressure in the battery compartment 12 reaches a preset safety threshold to release excess gas; the emergency switch 76 is used to stop the battery cluster 6 from working in an emergency.

[0027] In some embodiments of the utility model, the side walls of the inverter compartment 11 are also provided with air inlet shutters 9 and air outlets, and the air outlets are provided with rain covers 10; the air inlet shutters 9 and the air outlets can ensure air circulation in the inverter compartment 11, while preventing debris, rainwater, etc. from entering the interior, so as to meet the heat dissipation and ventilation requirements of the equipment in the inverter compartment 11.

[0028] In some embodiments of the present invention, LED ceiling lamps 30 are provided on the tops of the inverter compartment 11 and the battery compartment 12 .

[0029] The container body 1 of the utility model is provided with a separated inverter compartment 11 and a battery compartment 12. The energy storage converter 3, the photovoltaic controller 4 and the convergence and control cabinet 5 and other equipment are arranged in the inverter compartment 11. The battery compartment 12 can accommodate the battery cluster 6 to the maximum extent, and the space is reasonably utilized. It has a fire protection system, a constant temperature system 8, an air inlet shutter 9 and an air outlet, which improves the safety of the energy storage system. When using this energy storage system, the electricity generated by the photovoltaic module 2 and the electricity stored in the battery cluster 6 can be automatically switched and transmitted to the power grid or the load, reducing the enterprise's electricity bill expenditure, achieving peak shaving and valley filling, and further reducing energy costs.

[0030] It should be understood that all the above embodiments are illustrative rather than restrictive, and any modifications, equivalent changes and modifications made by those skilled in the art to the specific embodiments described above under the conception of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A containerized photovoltaic energy storage system, comprising a container body (1), a photovoltaic module (2), a battery cluster (6) and an EMS energy management system (40), characterized in that: The container body (1) is divided into an inverter compartment (11) and a battery compartment (12). The inverter compartment (11) is provided with an energy storage converter (3), a photovoltaic controller (4) and a converging and control cabinet (5). An isolation transformer is provided at the output end of the energy storage converter (3). The battery cluster (6) is provided in the battery compartment (12). The container body (1) is provided with a fire protection system and a constant temperature system (8). The fire protection system includes a fire protection host (71), a smoke alarm (71), and a control cabinet (5). The invention relates to a fire alarm (72) and a fire-fighting gas cylinder (73), wherein the fire-fighting main unit (71) is arranged on the side wall of the inverter compartment (11), the smoke alarm (72) is arranged on the battery compartment (12), the fire-fighting gas cylinder (73) is arranged on the inverter compartment (11), and the fire-fighting gas cylinder (73) is connected to a fire-fighting pipeline (731) leading to the battery compartment (12), and the constant temperature system (8) comprises an air conditioner (81), and the air conditioner (81) is installed on the side wall of the battery compartment (12).

2. The containerized photovoltaic energy storage system according to claim 1 is characterized in that: The photovoltaic assembly (2) is electrically connected to the battery cluster (6) via the photovoltaic controller (4), the battery cluster (6) is electrically connected to a power grid or a load via the energy storage converter (3), and the combiner in the combiner and control cabinet (5) is electrically connected to the photovoltaic assembly (2).

3. The containerized photovoltaic energy storage system according to claim 1 is characterized in that: The fire fighting system further comprises a gas release alarm light (74), an alarm bell (75) and an emergency switch (76) arranged on the side wall of the inverter compartment (11); the gas release alarm light (74) and the alarm bell (75) are electrically connected to the fire fighting host (71); and the emergency switch (76) is electrically connected to the battery cluster (6).

4. The containerized photovoltaic energy storage system according to claim 1 is characterized in that: The battery cluster (6) comprises a plurality of single lithium batteries, a BMS battery management system and a battery rack (61); the plurality of single lithium batteries are connected in series and electrically connected to the BMS battery management system; the battery rack (61) is used to place the plurality of single lithium batteries.

5. The containerized photovoltaic energy storage system according to claim 4 is characterized in that: The BMS battery management system includes a BMU battery management unit, a BCMU battery pack management unit and a BAMS battery cluster management system.

6. The containerized photovoltaic energy storage system according to claim 1 is characterized in that: The side wall of the inverter compartment (11) is also provided with an air inlet shutter (9) and an air outlet, and the air outlet is provided with a rain cover (10).

7. The containerized photovoltaic energy storage system according to claim 1 is characterized in that: A pressure relief valve (20) is provided on the side wall of the battery compartment (12).

8. The containerized photovoltaic energy storage system according to claim 1, characterized in that: An LED ceiling lamp (30) is provided on the top of the inverter compartment (11) and the battery compartment (12).

9. The containerized photovoltaic energy storage system according to claim 1, characterized in that: The fire-fighting gas cylinder (73) is a heptafluoropropane fire-extinguishing gas cylinder.

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