Constant-temperature energy storage prefabricated cabin

Abstract

The utility model discloses a constant-temperature energy storage prefabricated cabin. According to the constant-temperature energy storage prefabricated cabin, the main ventilation duct is connected with the air outlet of the air conditioner, transverse distribution of air-conditioning air is achieved, then the auxiliary ventilation duct is connected with the main ventilation duct, longitudinal distribution of the air-conditioning air is achieved, and the air-conditioning air can enter each air-cooled battery pack. External natural air is sucked in through the air inlet fan arranged at the air inlet, hot air between the energy storage battery packs is exhausted, and convection is formed between the interior of the prefabricated cabin and the exterior of the prefabricated cabin. When the temperature is high, the air inlet fan and the air exhaust fan are closed, respective shutters are also closed, and the air conditioner is started to realize refrigeration, air supply and cooling; when the temperature is low, the air inlet fan and the air exhaust fan are closed, the respective shutters are also closed, and the air conditioner is started, so that heating and air supply are realized, and the temperature of each battery is quickly increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and in particular relates to a constant temperature energy storage prefabricated cabin. Background Art

[0002] Since 2016, electrochemical energy storage has experienced rapid growth, with prefabricated containerized energy storage being the most widely deployed solution. To maximize space within containers, batteries are compactly arranged. Since batteries are chemical power sources, temperature significantly impacts their performance and lifespan. Maximizing battery performance and lifespan is a key research priority in the industry.

[0003] For example, the utility model with authorization announcement number CN220306329U discloses an air duct inside a prefabricated cabin for energy storage batteries. The utility model provides an air duct inside a prefabricated cabin for energy storage batteries, including an energy storage battery rack, a cooling channel is provided at the top of the energy storage battery rack, an air-conditioning fan is provided in the middle of the energy storage battery rack, an air-conditioning air inlet is provided at the bottom middle end of the cooling channel, an air duct is provided in the cooling channel, the air-conditioning air inlet is connected to the top of the air-conditioning fan, an air outlet is provided on one side of the cooling channel, a battery rack air outlet is provided at the bottom end of the air outlet, and the battery rack air outlet is located at the top of the energy storage battery rack.

[0004] In practice, the temperature inside prefabricated cabins is high in the summer, and air conditioning equipment consumes a lot of power. Due to the compact battery arrangement, the cooling effect is poor when the air conditioner is on. In particular, the heat generated by the batteries during charging, combined with poor heat dissipation, can lead to large temperature variations within the batteries, seriously impacting battery life and the safety of energy storage within the prefabricated cabin. Currently, there are no effective, concise measures to ensure relatively uniform battery temperatures and good heat dissipation while reducing the power consumption of the cooling equipment. Since battery discharge capacity is significantly affected by low temperatures, and the cabin temperature in prefabricated cabins is relatively low in extremely cold regions, raising the cabin temperature also increases the battery discharge capacity. Using air conditioning to raise the battery temperature to 20°C ± 5°C, the provided warmth rapidly raises the temperature of each battery, thereby improving battery discharge performance and enhancing the economic benefits of the system. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a constant temperature energy storage prefabricated cabin.

[0006] A constant temperature energy storage prefabricated cabin includes a prefabricated cabin, wherein the prefabricated cabin is provided with a plurality of battery racks, wherein the battery racks are provided with a plurality of placement positions, each placement position is provided with an energy storage battery pack, and there is a ventilation gap between adjacent energy storage battery packs. A horizontally arranged main ventilation duct is provided in the prefabricated cabin, and an air conditioner is provided on one side of the prefabricated cabin, and the air outlet of the air conditioner is connected to the main ventilation duct.

[0007] The prefabricated cabin is also provided with a vertically arranged sub-ventilation pipe connected to the main ventilation duct, and sub-air outlets are spaced apart on the sub-ventilation pipe;

[0008] The prefabricated cabin is also provided with an air inlet and an air outlet. The air inlet is provided with an air inlet fan, and the air outlet is provided with an air exhaust fan. The air inlet fan is used to supply air into the prefabricated cabin, and the air exhaust fan is used to exhaust air from the prefabricated cabin. Both the air inlet fan and the air exhaust fan are provided with openable and closable shutters.

[0009] Preferably, the air inlet is located at the bottom of one side of the prefabricated cabin, and the air outlet is located at the top of the side away from the air inlet.

[0010] Preferably, the main ventilation duct is provided at the top along the length direction of the prefabricated cabin;

[0011] The sub-ventilation ducts include a plurality of sub-ventilation ducts disposed between adjacent battery racks.

[0012] More preferably, the sub-air outlets gradually increase in size from top to bottom.

[0013] More preferably, the battery rack comprises two rows arranged along the length direction of the prefabricated cabin, and each row comprises a plurality of the battery racks;

[0014] The air conditioners include two, and the air outlet of each air conditioner is connected to a main ventilation duct, and each main ventilation duct is connected to a plurality of sub-ventilation pipes.

[0015] Preferably, one side of the prefabricated cabin in the length direction is provided with a cabin door;

[0016] The battery rack is provided with a plurality of placement positions from top to bottom, each placement position is provided with a detachable decorative panel on the side facing the hatch, and the other three sides of the placement position are provided with support bars for placing the energy storage battery pack.

[0017] More preferably, the battery rack includes a frame, which is welded from square steel; the frame is provided with the placement position, and angle steels are respectively provided in three directions of the placement position, and one side of the angle steel serves as the support bar.

[0018] Preferably, the energy storage battery pack includes a base and a plurality of batteries placed on the base, and the batteries are connected in series or in parallel via connecting bars.

[0019] More preferably, the bottom surface of the bottom bracket is provided with a bottom bracket ventilation duct, the bottom bracket ventilation duct is provided with a bottom bracket air inlet on the side of the bottom bracket facing the sub-air outlet on the sub-ventilation pipe, and a bottom bracket air outlet is provided on the other side or top surface opposite thereto;

[0020] The bottom support ventilation duct is covered with a cover plate, which is provided with ventilation holes. The top surface of the cover plate serves as a support surface for placing batteries.

[0021] The constant temperature energy storage prefabricated cabin of this utility model is based on the temperature monitored by the BMS battery in the energy storage prefabricated cabin. If the battery temperature exceeds 30°C, the louvered ventilation fan is activated for ventilation, and the temperature is cooled by circulating air. If the battery temperature exceeds 35°C, the louvered ventilation fan is closed, and the air conditioning is turned on for cooling. The air conditioning cooling stops when the cooling temperature reaches 25°C, thereby performing interval control to reduce power consumption. If the battery temperature is below 0°C (or the temperature threshold is set based on power demand and the relationship between battery temperature and capacity), the air conditioning is turned on for heating. The air conditioning heating stops when the heating temperature reaches 25°C to reduce power consumption. The above temperature settings can also be slightly adjusted according to actual conditions.

[0022] The present invention adopts a constant temperature energy storage prefabricated cabin that connects the main ventilation duct with the air-conditioning outlet to achieve the horizontal distribution of the air-conditioning wind, and then connects the sub-ventilation duct with the main ventilation duct to achieve the longitudinal distribution of the air-conditioning wind, so that the air-conditioning wind can enter each air-cooled battery pack. The air inlet fan set at the air inlet is used to draw in the natural air from the outside and discharge the hot air between the energy storage battery packs, so as to form convection between the inside and outside of the prefabricated cabin. When the temperature is high, the air inlet fan and the exhaust fan are turned off, their respective shutters are also closed, and the air conditioner is turned on to achieve cooling and air supply for cooling; when the temperature is low, the air inlet fan and the exhaust fan are also turned off, their respective shutters are also closed, and the air conditioner is turned on to achieve heating and air supply, and quickly increase the temperature of each battery. Through the design of the above structure, the battery can be compactly designed while maintaining the battery in an appropriate temperature range, reducing the impact of temperature on battery performance, and improving the battery discharge capacity and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the constant temperature energy storage prefabricated cabin of the utility model.

[0024] Figure 2 This is a three-dimensional structural diagram of the internal structure of the constant temperature energy storage prefabricated cabin of the utility model.

[0025] Figure 3 This is a side view schematic diagram of the internal structure of the constant temperature energy storage prefabricated cabin of the utility model.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of a set of main ventilation ducts and sub-ventilation pipes.

[0027] Figure 5 This is a structural diagram of the sub-air outlet on the sub-ventilation duct.

[0028] Figure 6 A schematic diagram of the three-dimensional structure of a battery rack and some energy storage battery packs placed on it.

[0029] Figure 7 A schematic diagram of the side structure of a battery rack and some energy storage battery packs placed on it.

[0030] Figure 8 Schematic diagram of the three-dimensional structure of the energy storage battery pack.

[0031] Figure 9 Schematic diagram of the three-dimensional structure of the base.

[0032] Figure 10 It is a structural schematic diagram of the ventilation duct in the bottom support.

[0033] Reference numerals:

[0034] Prefabricated cabin 1, cabin door 11, air inlet 12, air outlet 13,

[0035] Battery rack 2, square steel 21, angle steel 22,

[0036] Energy storage battery pack 3, bottom bracket 31, bottom bracket ventilation duct 32, bottom bracket air inlet 33, bottom bracket air outlet 34, cover 35, ventilation hole 36, battery 37, decorative plate 38,

[0037] Main ventilation duct 4, air conditioning 5,

[0038] Sub-ventilation duct 6, sub-air outlet 61. DETAILED DESCRIPTION

[0039] like Figures 1 to 10 As shown, a constant temperature energy storage prefabricated cabin includes a prefabricated cabin 1, and a plurality of battery racks 2 are arranged in the prefabricated cabin 1.

[0040] like Figure 1 As shown, the prefabricated cabin 1 is in the shape of a rectangular parallelepiped as a whole, wherein a hatch 11 is provided on one side of the prefabricated cabin 1 in the length direction. When the hatch 11 is opened, it is used to adjust the internal structure, and the hatch 11 is kept closed at ordinary times.

[0041] The prefabricated cabin 1 is further provided with an air inlet 12 and an air outlet 13. The air inlet 12 is provided with an air inlet fan, and the air outlet 13 is provided with an exhaust fan. The air inlet fan is used to bring air into the prefabricated cabin 1, and the exhaust fan is used to exhaust air from the prefabricated cabin 1. Both the air inlet fan and the exhaust fan are equipped with openable and closable shutters. The air inlet 12 is located at the bottom of one side of the prefabricated cabin 1, and the air outlet 13 is located at the top of the side away from the air inlet 12.

[0042] When the battery temperature inside the prefabricated cabin 1 exceeds a certain temperature but is not particularly high, the louvered ventilation fan can be activated for ventilation. The air inlet fan provided at the air inlet 12 draws in natural air from the outside, and the exhaust fan provided at the air outlet 13 discharges the hot air inside the prefabricated cabin 1 to the outside. The circulating air cools the cabin 1 and creates convection between the inside and outside of the prefabricated cabin 1. Because hot air rises due to its low density and cold air sinks due to its high density, placing the air inlet 12 near the bottom and the air outlet 13 near the top facilitates the discharge of hot air from the prefabricated cabin 1.

[0043] like Figure 2 and Figure 3 As shown, multiple battery racks 2 are installed within the prefabricated cabin 1. The number of battery racks 2 can be increased or decreased based on the actual size of the prefabricated cabin 1. In the structure shown in the figure, the battery racks 2 are arranged in two rows along the length of the prefabricated cabin 1, with a total of five battery racks in each row. A gap is left between adjacent battery racks 2 in each row.

[0044] like Figure 6 and Figure 7 As shown, the battery rack 2 comprises a frame welded from square steel 21. Each battery rack 2 is provided with multiple placement locations, each housing a battery pack 3. Ventilation gaps are provided between adjacent battery packs 3. From top to bottom, the battery rack 2 has multiple placement locations. Each location is equipped with a removable decorative panel 38 on the side facing the hatch 11, and support bars for the battery packs 3 are provided on the other three sides of the location. Angle steel 22 is provided in three directions within the placement locations on the frame, with one side of the angle steel 22 serving as a support bar.

[0045] like Figures 1 to 5 As shown, the prefabricated cabin 1 is provided with a horizontally arranged main ventilation duct 4, and an air conditioner 5 is installed on one side of the prefabricated cabin 1, with the air conditioner outlet connected to the main ventilation duct 4. The prefabricated cabin 1 is also provided with a vertically arranged sub-ventilation duct 6 connected to the main ventilation duct 4, and sub-air outlets 61 are spaced apart on the sub-ventilation duct 6.

[0046] The main ventilation duct 4 is arranged at the top along the length direction of the prefabricated cabin 1. There are two air conditioners 5, and the air outlet of each air conditioner 5 is connected to a main ventilation duct 4. Each main ventilation duct 4 is correspondingly arranged above a row of battery racks 2. A plurality of sub-ventilation ducts 6 are connected to each main ventilation duct 4. A sub-ventilation duct 6 is provided between every two adjacent battery racks 2. The sub-air outlets 61 on the sub-ventilation duct 6 gradually increase in size from top to bottom. Because the cold air or hot air from the air conditioner flows downward from the top of the sub-ventilation duct 6, the sub-air outlets 61 are designed to gradually increase in size from top to bottom, so that the cold air flow coming out of each sub-air outlet 61 is more uniform.

[0047] like Figures 8-10As shown, the energy storage battery pack 3 includes a base 31 and a plurality of batteries 37 placed on the base 31. The batteries 37 are connected in series or in parallel via connecting bars. A base ventilation duct 32 is provided on the inner bottom surface of the base 31. The base ventilation duct 32 is provided with a base air inlet 33 on the side of the base 31 facing the sub-air outlet 61 on the sub-ventilation pipe 6, and a base air outlet 34 is provided on the other side or top surface. In the structure shown in the figure, the base air outlet 34 is provided on the top edge of the base 31. A cover plate 35 covers the top of the base ventilation duct 32, and the cover plate 35 is provided with ventilation holes 36. The top surface of the cover plate 35 serves as a support surface for placing the batteries 37.

[0048] Cool or warm air exiting the sub-air outlet 61 of the sub-ventilation duct 6 enters the bottom support ventilation duct 32 through the bottom support air inlet 33 on the side of the bottom support 31, and then flows upward from the ventilation holes 36 on the cover plate 35 toward the battery 37, thereby cooling or heating the battery 37. Excess cool or warm air can be discharged upward through the bottom support air outlet 34.

[0049] The constant temperature energy storage prefabricated cabin of the present invention is based on the BMS battery monitoring temperature inside the energy storage prefabricated cabin. When the battery temperature exceeds 30°C, the louvered ventilation fan is started (the air inlet fan at the air inlet 12 and the exhaust fan at the exhaust port 13 are both open, and the corresponding louvers are opened at the same time) for ventilation, and the temperature is cooled by circulating air. If the battery temperature exceeds 35°C, the louvered ventilation fan is closed, and the air conditioning is turned on for cooling. The air conditioning stops when the cooling temperature reaches 25°C, thereby performing interval control to reduce power consumption. When the battery temperature is lower than 0°C (or according to the power demand, the temperature threshold is set with reference to the relationship between battery temperature and capacity), the air conditioning is turned on for heating. The air conditioning stops when the heating temperature reaches 25°C to reduce power consumption. The above temperature settings can also be slightly adjusted according to actual conditions.

Claims

1. A constant temperature energy storage prefabricated cabin, comprising a prefabricated cabin, wherein a plurality of battery racks are provided in the prefabricated cabin, wherein the battery racks are provided with a plurality of placement positions, each placement position is provided with an energy storage battery pack, and adjacent energy storage battery packs have gaps for ventilation, characterized in that: A horizontally arranged main ventilation duct is provided in the prefabricated cabin, and an air conditioner is provided on one side of the prefabricated cabin, and the air outlet of the air conditioner is connected to the main ventilation duct. The prefabricated cabin is also provided with a vertically arranged sub-ventilation pipe connected to the main ventilation duct, and sub-air outlets are spaced apart on the sub-ventilation pipe; The prefabricated cabin is also provided with an air inlet and an air outlet. The air inlet is provided with an air inlet fan, and the air outlet is provided with an air exhaust fan. The air inlet fan is used to supply air into the prefabricated cabin, and the air exhaust fan is used to exhaust air from the prefabricated cabin. Both the air inlet fan and the air exhaust fan are provided with openable and closable shutters.

2. The constant temperature energy storage prefabricated cabin according to claim 1 is characterized in that: The air inlet is located at the bottom of one side of the prefabricated cabin, and the air outlet is located at the top of the side away from the air inlet.

3. The constant temperature energy storage prefabricated cabin according to claim 1 is characterized in that: The main ventilation duct is arranged at the top along the length direction of the prefabricated cabin; The sub-ventilation ducts include a plurality of sub-ventilation ducts disposed between adjacent battery racks.

4. The constant temperature energy storage prefabricated cabin according to claim 3 is characterized in that: The sub-air outlets gradually increase in size from top to bottom.

5. The constant temperature energy storage prefabricated cabin according to claim 3 is characterized in that: The battery racks include two rows arranged along the length direction of the prefabricated cabin, and each row includes a plurality of battery racks; The air conditioners include two, and the air outlet of each air conditioner is connected to a main ventilation duct, and each main ventilation duct is connected to a plurality of sub-ventilation pipes.

6. The constant temperature energy storage prefabricated cabin according to claim 1, characterized in that: One side of the prefabricated cabin in the length direction is provided with a cabin door; The battery rack is provided with a plurality of placement positions from top to bottom, each placement position is provided with a detachable decorative panel on the side facing the hatch, and the other three sides of the placement position are provided with support bars for placing the energy storage battery pack.

7. The constant temperature energy storage prefabricated cabin according to claim 6, characterized in that: The battery rack includes a frame, which is welded from square steel. The frame is provided with the placement position, and angle steels are respectively provided in three directions of the placement position, and one side of the angle steel serves as the support bar.

8. The constant temperature energy storage prefabricated cabin according to claim 1, characterized in that: The energy storage battery pack includes a base and a plurality of batteries placed on the base, and the batteries are connected in series or in parallel via connecting bars.

9. The constant temperature energy storage prefabricated cabin according to claim 8, characterized in that: The bottom surface of the bottom bracket is provided with a bottom bracket ventilation duct, the bottom bracket ventilation duct is provided with a bottom bracket air inlet on the side of the bottom bracket facing the sub-air outlet on the sub-ventilation pipe, and a bottom bracket air outlet on the other side or top surface opposite thereto; The bottom support ventilation duct is covered with a cover plate, which is provided with ventilation holes. The top surface of the cover plate serves as a support surface for placing batteries.

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