Energy storage outdoor cabinet and temperature control method

Abstract

Disclosed in the present invention are an energy storage outdoor cabinet and a temperature control method. A middle partition wall is provided in a cavity of a cabinet body and divides the cavity into a battery compartment and an electrical compartment in the left and right directions; a dynamic air inlet is provided on a ground side of a front side panel of the electrical compartment, and an air intake fan is mounted at a position corresponding to the dynamic air inlet; a dynamic air outlet is provided on a top side of a rear side panel of the electrical compartment, and an air output fan is mounted at a position corresponding to the dynamic air inlet; and an air intake channel is provided in a position of the middle partition wall that is close to and aligned with the dynamic air inlet, an air output channel is provided in a position of the middle partition wall that is close to and aligned with the dynamic air outlet, and the dynamic air inlet, the electrical compartment, the air intake channel, the battery compartment, the air output channel, the electrical compartment and the dynamic air outlet are in sequential communication with one another to form an omega-shaped airflow communication channel. In the temperature control method, a temperature control strategy of two-stage temperature switching control is adopted after comparing the temperature inside the battery compartment with a set starting temperature of an industrial air conditioner. The present invention has two-stage temperature control, thereby prolonging the service life of an air conditioner, and improving the overall energy storage income of a product.

Description

Energy storage outdoor cabinet and temperature control method Technical Field

[0001] The present invention relates to an outdoor energy storage cabinet, and in particular to an outdoor energy storage cabinet and a temperature control method. Background Art

[0002] Energy storage is a crucial component of renewable energy systems and smart grids. With the intensification of environmental pollution and the growing demand for sustainable energy, the development and use of renewable energy sources has become increasingly important. In recent years, wind power and photovoltaic power generation have been the two sectors with the fastest growth and demand in the renewable energy sector. However, these renewable energy sources are intermittent and unstable, making the application of energy storage technology particularly important. Energy storage technology plays a key role in improving the controllability and utilization of these energy sources. Energy storage technology is widely used on the grid, user, and power generation sides to meet diverse needs. On the grid side, when renewable energy supply experiences intermittent interruptions, energy storage systems automatically step in to provide temporary power supply, ensuring continuous power supply. On the user side, energy storage systems enable users to maintain normal electricity needs despite unstable power supply. For wind and photovoltaic power generation, energy storage technology can balance the intermittent and unstable characteristics of these sources, improving the reliability and controllability of the power system. Energy storage systems can store energy from renewable energy during periods of excess generation and release it during periods of insufficient power supply to meet grid needs.

[0003] Lithium batteries are increasingly being used in production and daily life due to their high performance and long lifespan. Among energy storage products, lithium iron phosphate batteries have gained widespread application due to their high safety. Although lithium batteries offer higher efficiency than other types of battery energy storage systems, they face common challenges. Besides uncontrollable losses such as the energy storage system's battery charge and discharge efficiency, inverter efficiency, and cable losses, thermal management losses are particularly significant. Batteries typically release significant amounts of heat during the charge and discharge process. Ensuring that batteries operate within a reasonable temperature range is crucial for both system safety and the battery's lifespan. Existing energy storage systems typically configure appropriate industrial air conditioners based on the number of batteries. These systems use monitored battery temperatures to control cooling or heating. This process consumes significant power, impacting overall energy storage benefits. Summary of the Invention

[0004] In order to solve the deficiencies of the above technologies, the present invention provides an outdoor energy storage cabinet and a temperature control method.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is an outdoor energy storage cabinet, which includes a cabinet body, a middle partition wall is set in the cavity of the cabinet body and is divided into a battery compartment for installing battery modules and an electrical compartment for installing electrical control components.

[0006] A dynamic air inlet is provided on the ground side of the front panel of the electrical compartment, and an air inlet fan is installed at the corresponding dynamic air inlet. A dynamic air outlet is provided on the top side of the rear panel of the electrical compartment, and an air outlet fan is installed at the corresponding dynamic air inlet.

[0007] An air inlet channel is opened on the middle partition wall close to and aligned with the dynamic air inlet, and an air outlet channel is opened on the middle partition wall close to and aligned with the dynamic air outlet. The dynamic air inlet, electrical compartment, air inlet channel, battery compartment, air outlet channel, electrical compartment, and dynamic air outlet are connected in sequence to form an Ω-shaped airflow connection channel.

[0008] Furthermore, the middle partition wall is installed at the center of the cavity of the cabinet body, and a wire threading hole connecting the battery compartment and the electrical compartment is opened on the middle partition wall.

[0009] Furthermore, the dynamic air inlet and the dynamic air outlet are both electric blinds, the electric blinds of the dynamic air inlet are electrically connected to the air inlet fan, and the electric blinds of the dynamic air outlet are electrically connected to the air outlet fan, and the air inlet fan and the air outlet fan are connected to the energy storage cabinet control system.

[0010] Furthermore, an industrial air conditioner is installed in the outdoor energy storage cabinet, and the industrial air conditioner is hung on the rear panel of the electrical compartment.

[0011] Furthermore, the cabinet body and the middle partition wall constitute the steel structure of the energy storage outdoor cabinet, and the interior of the steel structure is filled with rock wool to form an insulation layer.

[0012] A temperature control method for an outdoor energy storage cabinet is disclosed. The temperature control method compares the temperature inside a battery compartment with a set start-up temperature of an industrial air conditioner and adopts a two-stage temperature switching control temperature control strategy.

[0013] Furthermore, the temperature control strategy of the two-stage temperature switching control includes forced internal and external circulation ventilation temperature control and forced internal circulation temperature control.

[0014] Furthermore, the priority of the temperature control strategy for forced internal and external circulation ventilation temperature control is higher than the priority of forced internal circulation temperature control.

[0015] Furthermore, the forced internal and external circulation ventilation temperature control is that when the temperature in the battery compartment is lower than the set starting temperature of the industrial air conditioner, the dynamic air inlet, electrical compartment, air inlet channel, battery compartment, air outlet channel, electrical compartment, and dynamic air outlet are connected in sequence to form an Ω-shaped airflow connection channel, and the air inlet fan and air outlet fan are started for forced exhaust.

[0016] Furthermore, when the temperature in the battery compartment of the forced internal circulation temperature control reaches the set starting temperature of the industrial air conditioner, the dynamic air inlet and the dynamic air outlet are closed, and the industrial air conditioner is started to perform forced internal circulation to lower the temperature.

[0017] The present invention discloses an outdoor energy storage cabinet and temperature control method. The outdoor cabinet in the present invention has two-stage temperature control, which delays the battery from reaching the required temperature for air conditioning and refrigeration. When the ambient temperature is suitable, it can significantly delay and reduce the air conditioning startup time and operating time, reduce the power consumption generated by air conditioning and refrigeration, extend the air conditioning service life, and improve the overall energy storage benefits of the product. It can also achieve intermittent ventilation of the sealed battery compartment. The gas flow removes heat while also discharging combustible gases generated by battery charging and discharging from the battery compartment, reducing the concentration of combustible gases on one side of the battery compartment and improving the safety of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the overall structure of the present invention.

[0019] FIG2 is a first schematic diagram of air flow according to the present invention.

[0020] FIG3 is a second schematic diagram of air flow according to the present invention.

[0021] In the figure: 1. Cabinet body; 2. Middle partition wall; 3. Battery compartment; 4. Electrical compartment; 5. Dynamic air inlet; 6. Air inlet fan; 7. Dynamic air outlet; 8. Air outlet fan; 9. Air inlet duct; 10. Air outlet duct; 11. Wire hole; 12. Industrial air conditioner. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] As shown in Figure 1, an outdoor energy storage cabinet includes a cabinet body 1. A middle partition wall 2 is arranged in the cavity of the cabinet body to divide the cabinet into a battery compartment 3 for installing battery modules and an electrical compartment 4 for installing electrical control components. The electrical compartment 4 is installed with electrical components commonly used in this type of outdoor energy storage cabinet, such as PCS and high-voltage boxes. The cabinet body 1 and the middle partition wall 2 constitute the steel structure of the outdoor energy storage cabinet, and the interior of the steel structure is filled with rock wool to form an insulation layer. The rock wool, as an insulation layer material, can slow down the conduction and loss of heat, thereby improving the temperature stability inside the energy storage box.

[0024] A dynamic air inlet 5 is set on the ground side of the front panel of the electrical compartment 4, and an air inlet fan 6 is installed corresponding to the dynamic air inlet 5. A dynamic air outlet 7 is set on the top side of the rear panel of the electrical compartment 4, and an air outlet fan 8 is installed corresponding to the dynamic air inlet 5; the dynamic air inlet 5 and the dynamic air outlet 7 are both fixed waterproof and dustproof electric blinds. The dynamic air inlet 5 and the dynamic air outlet 7 both use fixed waterproof and dustproof electric blinds, which can effectively prevent external substances such as dust and pollutants from entering the electrical compartment 4, ensuring the normal operation and safe operation of electrical components.

[0025] The electric shutters of the dynamic air inlet 5 are electrically connected to the air inlet fan 6, while the electric shutters of the dynamic air outlet 7 are electrically connected to the air outlet fan 8. The air inlet fans 6 and 8 are connected to the energy storage cabinet control system. An air inlet duct 9 is provided on the middle partition wall 2, near and aligned with the dynamic air inlet 5. An air outlet duct 10 is provided on the middle partition wall 2, near and aligned with the dynamic air outlet 7. The dynamic air inlet 5 and the dynamic air outlet 7 are located at diagonally opposite corners of the middle partition wall 2 and are of equal size. Overall, the dynamic air inlet 5, electrical compartment 4, air inlet duct 9, battery compartment 3, air outlet duct 10, electrical compartment 4, and dynamic air outlet 7 are connected in sequence to form an Ω-shaped airflow channel, as shown in Figures 2-3. Due to the characteristics of cold air sinking and hot air rising, the dynamic air inlet 5 and air inlet duct 9 are positioned downward, while the dynamic air outlet 7 and air outlet duct 10 are positioned upward. Since cold air is relatively heavy and hot air is relatively light, the placement of air inlet duct 9 at the dynamic air inlet 5 allows cold air to enter the electrical compartment 4 from a lower position, thereby achieving the cold air sinking. The dynamic air outlet 7 and air outlet duct 10 are positioned upward, allowing hot air to be discharged through rising air. This allows the hot and cold air flows to form a good stratified circulation inside the energy storage box, enhancing the temperature control effect. When cold air enters the electrical compartment 4, the stratified circulation effectively lowers the temperature inside the compartment, allowing the rising hot air to be quickly discharged, thus ensuring that the heat inside the compartment 4 is promptly removed. The cold air can also quickly lower the temperature inside the compartment, thereby ensuring the stable operation of the equipment inside the energy storage box and extending its lifespan.

[0026] In this embodiment, a central partition wall 2 is installed in the center of the cabinet body. A cable hole 11 is provided in the central partition wall 2, connecting the battery compartment 3 and the electrical compartment 4 for routing connecting cables. An industrial air conditioner 12 is installed within the outdoor energy storage cabinet and is mounted on the rear panel of the electrical compartment 4.

[0027] The present invention also discloses a temperature control method for an outdoor energy storage cabinet. This temperature control method utilizes a two-stage temperature switching control strategy, comparing the temperature inside the battery compartment with the set startup temperature of an industrial air conditioner. The two-stage temperature switching control strategy includes forced internal and external circulation ventilation temperature control and forced internal circulation temperature control. Furthermore, the forced internal and external circulation ventilation temperature control strategy has a higher priority than the forced internal circulation temperature control strategy.

[0028] Specifically, forced internal and external circulation ventilation temperature control operates when the temperature inside the battery compartment falls below the set start-up temperature of the industrial air conditioner. The dynamic air inlet 5, electrical compartment 4, air inlet duct 9, battery compartment 3, air outlet duct 10, electrical compartment 4, and dynamic air outlet 7 are connected in sequence to form an Ω-shaped airflow channel. The inlet fan 6 and outlet fan 8 are activated for forced exhaust. The inlet fan, installed in the electrical compartment, draws fresh air at a suitable external temperature into the battery compartment through the dynamic air inlet. The outlet fan, located above the rear door on the partition wall, operates in the opposite direction, drawing air from the battery compartment into the isolated heat dissipation area of ​​the electrical compartment before exiting the cabinet through the electrical compartment outlet fan. The inlet and outlet fans rotate in opposite directions, continuously introducing new cool air and discharging hot air from within. This creates a high-volume air flow within the sealed battery compartment, thereby cooling the battery modules with incoming air. The electric inlet and outlet air shutters and the inlet and outlet fans are both electrically controlled to open or close by the energy storage cabinet control system. As the charge and discharge process progresses, the battery temperature slowly rises. When the temperature exceeds the set point for air conditioning, the system turns on the industrial air conditioner, simultaneously closing the inlet and outlet electric blinds and the inlet and outlet fans, sealing the battery compartment, and switching to air conditioning to cool the battery module. This forms the aforementioned forced internal circulation temperature control. When the temperature inside the battery compartment reaches the set start temperature for the industrial air conditioner, the dynamic air inlet 5 and dynamic air outlet 7 are closed, and the industrial air conditioner 12 is activated for forced internal circulation to lower the temperature.

[0029] The outdoor cabinet in this invention features two-stage temperature control, delaying the battery from reaching the required temperature for air conditioning. When the ambient temperature is suitable, this significantly delays and reduces the air conditioning's on-time and operating time, reducing power consumption, extending the air conditioning's service life, and improving the product's overall energy storage benefits. This allows for intermittent ventilation of the sealed battery compartment. This airflow removes heat while also discharging flammable gases generated by battery charging and discharging, reducing the concentration of flammable gases on one side of the compartment and improving the safety of the energy storage system.

[0030] The above embodiments are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the scope of the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. An outdoor energy storage cabinet, comprising a cabinet body (1), characterized in that: A middle partition wall (2) is arranged in the cavity of the cabinet body to divide the cavity into a battery compartment (3) for installing a battery module and an electrical compartment (4) for installing electrical control components. A dynamic air inlet (5) is provided on the ground-facing side of the front panel of the electrical compartment (4), and an air inlet fan (6) is installed at a position corresponding to the dynamic air inlet (5); a dynamic air outlet (7) is provided on the top-facing side of the rear panel of the electrical compartment (4), and an air outlet fan (8) is installed at a position corresponding to the dynamic air inlet (5); An air inlet channel (9) is provided on the middle partition wall (2) close to and aligned with the dynamic air inlet (5); an air outlet channel (10) is provided on the middle partition wall (2) close to and aligned with the dynamic air outlet (7); the dynamic air inlet (5), the electrical compartment (4), the air inlet channel (9), the battery compartment (3), the air outlet channel (10), the electrical compartment (4), and the dynamic air outlet (7) are connected in sequence to form an Ω-shaped airflow connection channel.

2. The energy storage outdoor cabinet according to claim 1, characterized in that: The middle partition wall (2) is installed at the center of the cavity of the cabinet body, and a wire threading hole (11) for connecting the battery compartment (3) and the electrical compartment (4) is formed on the middle partition wall (2).

3. The energy storage outdoor cabinet according to claim 1 is characterized in that: The dynamic air inlet (5) and the dynamic air outlet (7) are both electric blinds. The electric blinds of the dynamic air inlet (5) are electrically connected to the air inlet fan (6), and the electric blinds of the dynamic air outlet (7) are electrically connected to the air outlet fan (8). The air inlet fan (6) and the air outlet fan (8) are connected to the energy storage cabinet control system.

4. The energy storage outdoor cabinet according to claim 1, characterized in that: An industrial air conditioner (12) is installed in the energy storage outdoor cabinet, and the industrial air conditioner (12) is hung on the rear side panel of the electrical cabin (4).

5. The energy storage outdoor cabinet according to claim 1, characterized in that: The cabinet body (1) and the middle partition wall (2) form the steel structure of the outdoor energy storage cabinet, and the interior of the steel structure is filled with rock wool to form a thermal insulation layer.

6. A temperature control method for an outdoor energy storage cabinet, characterized in that: The temperature control method is to compare the temperature in the battery compartment with the set start-up temperature of the industrial air conditioner and adopt a temperature control strategy of two-stage temperature switching control.

7. The temperature control method of the energy storage outdoor cabinet according to claim 6 is characterized in that: The temperature control strategy of the two-stage temperature switching control includes forced internal and external circulation ventilation temperature control and forced internal circulation temperature control.

8. The temperature control method of the energy storage outdoor cabinet according to claim 6 is characterized in that: The priority of the temperature control strategy of the forced internal and external circulation ventilation temperature control is higher than the priority of the forced internal circulation temperature control.

9. The temperature control method of the energy storage outdoor cabinet according to claim 7, characterized in that: The forced internal and external circulation ventilation temperature control is that when the temperature in the battery compartment is lower than the set start temperature of the industrial air conditioner, the dynamic air inlet (5), the electrical compartment (4), the air inlet channel (9), the battery compartment (3), the air outlet channel (10), the electrical compartment (4), and the dynamic air outlet (7) are connected in sequence to form an Ω-shaped airflow connection channel, and the air inlet fan (6) and the air outlet fan (8) are started to perform forced exhaust.

10. The temperature control method of the energy storage outdoor cabinet according to claim 7, characterized in that: When the temperature in the battery compartment under forced internal circulation temperature control reaches the set start-up temperature of the industrial air conditioner, the dynamic air inlet (5) and the dynamic air outlet (7) are closed, and the industrial air conditioner (12) is started to perform forced internal circulation to lower the temperature.

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