Small off-grid and grid-connected lithium battery energy storage device

Abstract

The utility model discloses a small off-grid and grid-connected lithium battery energy storage device, and relates to the technical field of energy storage equipment. Comprising a cabinet body, a vortex fan is arranged at the inner bottom of the cabinet body, a rack is installed in the cabinet body, strip-shaped air knives are evenly distributed on the two sides of the rack, the strip-shaped air knives are connected with air outlets of the vortex fan through hoses, an energy storage battery is arranged on the lower portion of the rack, a thermistor is attached to the surface of the energy storage battery, and an energy storage converter is placed on the upper portion of the rack. According to the small off-grid and grid-connected lithium battery energy storage device, ventilation and heat dissipation are carried out during working through the exhaust fan, the temperature in the cabinet is kept within a proper range, the thermistor is attached to the surface of the battery, the temperature of the surface of the battery can be directly measured, and when the temperature of the battery reaches an early warning value, air is supplied into the strip-shaped air knife through the vortex fan; under the action of the strip-shaped air knife, a strong air curtain is formed and is directly blown to the battery for cooling, so that the battery can be quickly recovered to a proper working temperature range.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, specifically to a small-scale off-grid and grid-connected lithium battery energy storage device. Background Technology

[0002] Photovoltaic systems come in a variety of forms depending on their application. Among them, grid-connected and off-grid energy storage systems are characterized by being able to generate electricity, store energy, and operate independently off-grid. In some commercial areas, due to limited transformer capacity, the electricity generated by photovoltaic systems cannot be sold to the grid. In other areas, the local power grid is unstable, the grid-connected electricity price is too cheap, the individual electricity price is high, and the peak-valley price difference is large. In these areas, grid-connected and off-grid energy storage systems are suitable for installing photovoltaic power stations.

[0003] The energy storage business includes residential energy storage. Residential energy storage can use integrated energy storage and inverter devices, which are called integrated energy storage units. Integrated energy storage units can store energy and release it when needed. They are widely used. However, common integrated energy storage units generate a lot of heat and need to be cooled to extend the product's lifespan, resulting in a poor user experience. Utility Model Content

[0004] This invention provides a small-scale on-grid and off-grid lithium battery energy storage device to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a small off-grid and grid-connected lithium battery energy storage device, comprising a cabinet, a vortex fan installed at the bottom of the cabinet, and a frame installed inside the cabinet. Strip-shaped air knives are evenly distributed on both sides of the frame, and the strip-shaped air knives are connected to the air outlet of the vortex fan via flexible hoses. An energy storage battery is installed at the bottom of the frame, and a thermistor is attached to the surface of the energy storage battery. An energy storage converter is placed at the top of the frame, and the energy storage converter is electrically connected to the energy storage battery via wires. An exhaust fan is installed at the top of the cabinet, and a cabinet door is installed on the front side of the cabinet via hinges, with a temperature control panel embedded in the cabinet door. The vortex fan, the thermistor, and the exhaust fan are electrically connected to the temperature control panel.

[0006] Furthermore, a groove is provided on one side of the cabinet, and a terminal block is installed on the groove.

[0007] Furthermore, the energy storage converter and the temperature control panel are electrically connected to the terminal block via wires.

[0008] Furthermore, the lower side wall of the cabinet is provided with an opening, and the air inlet of the vortex fan is connected to the opening.

[0009] Furthermore, the strip-shaped air knife is located on the upper surface of the energy storage battery, and the thermistor is located on the bottom surface of the energy storage battery.

[0010] Furthermore, the air inlet of the exhaust fan is located inside the cabinet, and louvers are installed at the bottom of the cabinet door.

[0011] Furthermore, a flat lock is installed on the cabinet door, and the flat lock is used to lock and connect the cabinet body.

[0012] Compared with the prior art, this utility model provides a small-scale on-grid and off-grid lithium battery energy storage device, which has the following beneficial effects:

[0013] This small off-grid lithium battery energy storage device uses an exhaust fan for ventilation and heat dissipation during operation to maintain the temperature inside the cabinet within a suitable range. A thermistor is attached to the battery surface to directly measure the battery surface temperature. When the battery temperature reaches the warning value, a vortex fan sends air into the strip air knife. Under the action of the strip air knife, a strong air curtain is formed and blown directly onto the battery for cooling, which helps the battery quickly return to the suitable operating temperature range. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 3 This is a side view of the present invention.

[0017] In the diagram: 1. Cabinet; 2. Vortex fan; 3. Frame; 4. Strip air knife; 5. Energy storage battery; 6. Thermistor; 7. Energy storage converter; 8. Exhaust fan; 9. Cabinet door; 10. Temperature control panel; 11. Recess; 12. Terminal block; 13. Through port; 14. Louver; 15. Flat lock. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3This utility model discloses a small-scale off-grid and grid-connected lithium battery energy storage device, including a cabinet 1. A vortex fan 2 is installed at the bottom of the cabinet 1, and a frame 3 is installed inside the cabinet 1. Strip-shaped air knives 4 are evenly distributed on both sides of the frame 3, and the strip-shaped air knives 4 are connected to the air outlet of the vortex fan 2 through flexible hoses. An energy storage battery 5 is installed at the bottom of the frame 3, and a thermistor 6 is attached to the surface of the energy storage battery 5. An energy storage converter 7 is placed at the top of the frame 3, and the energy storage converter 7 is electrically connected to the energy storage battery 5 through wires. An exhaust fan 8 is installed at the top of the cabinet 1, and the front side of the cabinet 1... The cabinet door 9 is installed via hinges, and a temperature control panel 10 is embedded in the cabinet door 9. Ventilation and heat dissipation are carried out by the exhaust fan 8 during operation to keep the temperature inside the cabinet within a suitable range. A thermistor 6 is attached to the surface of the battery to directly measure the surface temperature of the battery. When the battery temperature reaches the warning value, the vortex fan 2 sends air into the strip air knife 4. Under the action of the strip air knife 4, a strong air curtain is formed and blown directly onto the battery for cooling, which helps the battery to quickly return to the suitable operating temperature range. The vortex fan 2, the thermistor 6 and the exhaust fan 8 are electrically connected to the temperature control panel 10.

[0020] Specifically, a groove 11 is provided on one side of the cabinet 1, and a terminal block 12 is installed on the groove 11.

[0021] In this embodiment, the terminal block 12 is an important tool for connecting the power supply to the load. Its connection process can not only adapt to electrical equipment of different voltage levels, but also provide power and transmit signals to the electrical equipment. The groove 11 is used to provide a fixed position for the terminal block 12.

[0022] Specifically, the energy storage converter 7 and the temperature control panel 10 are electrically connected to the terminal block 12 via wires.

[0023] In this implementation scheme, the energy storage converter 7 can realize the mutual conversion between DC and AC power, and control the charging and discharging process of the battery. It converts DC power into AC power or vice versa through a built-in DC / AC bidirectional converter, ensuring bidirectional energy flow between the grid and the energy storage system. In grid-connected mode, the energy storage converter 7 can charge or discharge according to the grid demand. During the off-peak period, it rectifies the AC power of the grid into DC power to charge the energy storage battery 5. During the peak period, it inverts the DC power in the battery into AC power and feeds it back to the grid, achieving the purpose of peak shaving and valley filling, power load balancing and power quality regulation. In off-grid mode, the energy storage converter 7 can independently supply power to the local load, act as the power source of the microgrid, provide stable voltage and frequency, and ensure the normal operation of the local load. This mode is particularly suitable for remote areas, islands and other areas not covered by the grid, as well as emergency disaster relief and other occasions. The temperature control panel 10 refers to the temperature controller, which intelligently adjusts the working mode of related equipment by monitoring the ambient temperature in real time and comparing it with the preset temperature to achieve the purpose of energy saving and comfort.

[0024] Specifically, the lower side wall of the cabinet 1 is provided with an opening 13, and the air inlet of the vortex fan 2 is connected to the opening 13.

[0025] In this embodiment, the vortex blower 2 is mainly used to provide strong airflow and negative pressure, and the inlet 13 is used to introduce outside air into the vortex blower 2.

[0026] Specifically, the strip-shaped air knife 4 is located on the upper surface of the energy storage battery 5, and the thermistor 6 is located on the bottom surface of the energy storage battery 5.

[0027] In this embodiment, the strip air knife 4 is a device specially designed to blow out a strong and high-speed airflow to remove dust, dry water stains, and cool down. The thermistor 6 is a surface-mount NTC that can accurately measure temperature. Its resistance changes with temperature, so it is often used in various temperature measurement devices.

[0028] Specifically, the air inlet of the exhaust fan 8 is located inside the cabinet 1, and the lower part of the cabinet door 9 is equipped with louvers 14.

[0029] In this implementation scheme, the main function of the exhaust fan 8 is heat dissipation. Electrical equipment generates a lot of heat during operation. If it is not dissipated in time, it may cause the equipment to overheat, be damaged, or even stop working. The exhaust fan 8 reduces the temperature inside the cabinet by expelling the hot air inside the cabinet and introducing fresh air, thereby extending the service life of the equipment and improving production efficiency. The louver 14 is designed to allow air circulation and help dissipate heat inside the cabinet.

[0030] Specifically, a flat lock 15 is installed on the cabinet door 9, and the flat lock 15 is locked to the cabinet body 1.

[0031] In this implementation plan, the flat lock 15 can significantly improve the security of the cabinet. Its main functions include ensuring security, facilitating operation and maintenance, adapting to harsh environments, and preventing unauthorized access.

[0032] During use, the exhaust fan 8 is used for ventilation and heat dissipation to keep the temperature inside the cabinet within a suitable range. A thermistor 6 is attached to the surface of the battery to directly measure the surface temperature of the battery. When the battery temperature reaches the warning value, the vortex fan 2 sends air into the strip air knife 4. Under the action of the strip air knife 4, a strong air curtain is formed and blown directly onto the battery for cooling, which helps the battery to quickly return to the suitable operating temperature range.

[0033] In summary, this small on-grid and off-grid lithium battery energy storage device uses exhaust fan 8 for ventilation and heat dissipation during operation to maintain the temperature inside the cabinet within a suitable range. A thermistor 6 is attached to the battery surface to directly measure the battery surface temperature. When the battery temperature reaches the warning value, the vortex fan 2 sends air into the strip air knife 4. Under the action of the strip air knife 4, a strong air curtain is formed and blown directly onto the battery for cooling, which helps the battery to quickly return to the suitable operating temperature range.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small off-grid lithium battery energy storage device comprising a cabinet (1), characterized in that: The inner bottom of the cabinet (1) is provided with a vortex fan (2), and a rack (3) is installed in the cabinet (1), strip-shaped air knives (4) are arranged on both sides of the rack (3), the strip-shaped air knives (4) are connected with the air outlet of the vortex fan (2) through a hose, an energy storage battery (5) is arranged at the lower part of the rack (3), a thermistor (6) is attached to the surface of the energy storage battery (5), an energy storage converter (7) is placed at the upper part of the rack (3), the energy storage converter (7) is electrically connected with the energy storage battery (5) through a wire, an exhaust fan (8) is installed at the top of the cabinet (1), a cabinet door (9) is hingedly installed on the front side of the cabinet (1), a temperature control panel (10) is embedded on the cabinet door (9), and the vortex fan (2), the thermistor (6) and the exhaust fan (8) are electrically connected with the temperature control panel (10) respectively.

2. The small-scale off-grid lithium battery energy storage device of claim 1, wherein: A groove (11) is arranged on one side of the cabinet (1), and a terminal block (12) is installed on the groove (11).

3. The small-scale off-grid lithium battery energy storage device of claim 2, wherein: The energy storage converter (7) and the temperature control panel (10) are electrically connected with the terminal block (12) through wires respectively.

4. The small-scale off-grid lithium battery energy storage device of claim 1, wherein: A through port (13) is arranged on the lower side wall of the cabinet (1), and the air inlet of the vortex fan (2) is connected with the through port (13).

5. The small-scale off-grid lithium battery energy storage device of claim 1, wherein: The strip-shaped air knives (4) are located on the upper surface of the energy storage battery (5), and the thermistor (6) is located on the bottom surface of the energy storage battery (5).

6. The small-scale off-grid lithium battery energy storage device of claim 1, wherein: The air inlet of the exhaust fan (8) is located in the cabinet (1), and a louver (14) is installed at the lower part of the cabinet door (9).

7. The small-scale off-grid lithium battery energy storage device of claim 1, wherein: A flat lock (15) is installed on the cabinet door (9), and the cabinet door (9) is locked and connected with the cabinet (1) through the flat lock (15). A flat lock (15) is installed on the cabinet door (9), and the cabinet door (9) is locked and connected with the cabinet (1) through the flat lock (15).

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