Condensation prevention and control system for energy storage container

Abstract

The utility model belongs to the field of energy storage containers, and provides an energy storage container condensation prevention and control system which comprises a container, a battery pack, an air conditioner, a BCU unit, a liquid cooling unit, an anti-explosion ventilation valve, a module and a BMU unit. A shell heating film is further arranged on a shell of the battery pack, a container humidity sensor and a battery pack humidity sensor are arranged in the container and the battery pack respectively, and an air pressure sensor, a dehumidifier and a water immersion sensor which are electrically connected with the BCU are arranged in the container. The detection end of the water sensor is provided with a radiator and a diversion trench. The device adopts multiple protection of temperature control, humidity control and air pressure monitoring, is used for preventing and controlling generation of condensation in the energy storage container, and is beneficial to improving safety and reliability of the container.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage containers, and in particular relates to a condensation prevention and control system for energy storage containers. Background Technology

[0002] In recent years, with the rapid development of the clean energy industry, the demand for energy storage in China has been increasing year by year. Since energy storage products are mostly high-voltage, their safety and reliability have received increasing attention. As a core component of energy storage, the energy storage container plays a crucial role in the performance, safety, and lifespan of the energy storage system. Energy storage containers generally only achieve an IP54 sealing rating, which cannot completely isolate water. While the battery packs inside the container can achieve an IP67 sealing rating, effectively preventing liquid water intrusion, they are typically equipped with explosion-proof vent valves to maintain pressure balance between the inside and outside of the battery pack. These explosion-proof vent valves usually only prevent liquid water from entering the container, but cannot completely isolate moisture. As moisture gradually accumulates under certain conditions, it may condense and drip onto high-voltage components, leading to corrosion, insulation failure, and even short circuits and fires.

[0003] By disrupting the conditions for condensation formation, such as temperature difference and humidity, the phenomenon can be fundamentally eliminated. Currently, the more common and widely used methods for eliminating condensation include temperature control and humidity control. The former aims to eliminate temperature differences, while the latter aims to reduce relative humidity. Existing patent CN218241946U discloses an energy storage container. The specific method for eliminating condensation in this container is as follows: when the difference between the outdoor ambient temperature T1 and the surface temperature T2 exceeds a preset critical temperature difference, the battery module is considered to have reached the critical condensation condition. At this point, if maintenance personnel need to maintain the energy storage container, the surface temperature T2 of the liquid cooling system should be increased. If the liquid cooling system is in cooling mode, it can be controlled to stop cooling. If the liquid cooling system is not in cooling mode, it can be controlled to operate in heating mode, that is, the heating components in the corresponding pipes of the liquid cooling system can be controlled to work to increase the temperature of the coolant, thereby increasing the surface temperature T2 of the battery module. This prevents condensation from appearing on the surface of the battery module inside the container after the door is opened, thus avoiding dangerous accidents such as short circuits. However, this energy storage battery pack has significant shortcomings in humidity monitoring, which affects its overall judgment of condensation and delays the appropriate time to eliminate condensation. Furthermore, the container space is relatively large, and the data collected by the acquisition module may not be applicable to the entire container space. There may be discrepancies between the actual data and the collected data in places far from the acquisition module. Secondly, by controlling the temperature and humidity of the entire system to suppress condensation, there is no targeted monitoring of components prone to condensation. If the system contains a large number of components, there is a high risk of individual component failure. Utility Model Content

[0004] This invention addresses the technical problems existing in the aforementioned energy storage containers by proposing a condensation prevention and control system for energy storage containers. It employs multiple protections, including temperature control, humidity control, and air pressure monitoring, to prevent and control condensation formation inside the energy storage container, thereby improving the safety and reliability of the container.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an energy storage container condensation prevention and control system, including a container and multiple temperature sensors. The container's interior houses a battery pack, an air conditioner, a BCU unit, and a liquid cooling unit. The battery pack is equipped with an explosion-proof vent valve. The battery pack's interior contains a module and a BMU unit, which are electrically connected to the BCU unit. The multiple temperature sensors include a module temperature sensor mounted on the module, a battery pack housing temperature sensor mounted on the battery pack's shell, and a container temperature sensor located inside the container. The battery pack's shell... The container is also equipped with a housing heating film. The housing heating film, module temperature sensor, battery pack housing temperature sensor, and battery pack humidity sensor are all electrically connected to the BMU unit. The container humidity sensor and battery pack humidity sensor are respectively installed inside the container and inside the battery pack. The container is equipped with a pressure sensor, dehumidifier, and water immersion sensor that are electrically connected to the BCU unit. The detection end of the water immersion sensor is equipped with a heat sink and a flow guide channel. The flow guide channel is connected to the outside of the container and is located near the corner of the container. The heat sink is located inside the container and away from the container temperature sensor and container humidity sensor.

[0006] Preferably, the guide channel includes multiple outlet grilles located inside the container, and the outlet grilles have a confluence area in the direction of water discharge. One end of the confluence area is provided with an outlet that communicates with the outside of the container, and the diameter of the outlet is less than 2cm × 2cm.

[0007] Preferably, the housing heating film is a polyimide heating film and is arranged in pairs on the two inner sidewalls of the battery pack housing.

[0008] Preferably, the air pressure sensor is a piezoelectric ceramic air pressure sensor.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] This utility model provides a condensation prevention and control system for energy storage containers. It employs multiple protections, including temperature control, humidity control, and air pressure monitoring, to prevent and control condensation formation inside the energy storage container. It is also equipped with air conditioners, dehumidifiers, shell heating films, and liquid cooling units to provide active suppression measures, which helps improve the safety and reliability of the container. Furthermore, the design is reasonable and suitable for large-scale promotion. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic diagram of a condensation prevention and control system for an energy storage container is provided for an embodiment.

[0013] Figure 2 This is a schematic diagram of the strategy flow of a condensation prevention and control system for an energy storage container.

[0014] Figure 3 A top view of the guide channel provided in the embodiment;

[0015] In the above figures: 1. Container; 2. Battery pack; 3. Module; 4. Module temperature sensor; 5. Battery pack housing temperature sensor; 6. Battery pack humidity sensor; 7. Housing heating film; 8. BMU unit; 9. Explosion-proof vent valve; 10. Container temperature sensor; 11. Container humidity sensor; 12. Barometric pressure sensor; 13. Air conditioner; 14. Dehumidifier; 15. BCU unit; 16. Liquid cooling unit; 17. Water immersion sensor; 18. Radiator; 19. Flow guide channel; 191. Outlet grille; 192. Merging area; 193. Water outlet. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Examples, such as Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a condensation prevention and control system for an energy storage container, including a container 1 and multiple temperature sensors. The container 1 houses a battery pack 2, an air conditioner 13, a BCU unit 15, and a liquid cooling unit 16. The battery pack 2 is equipped with an explosion-proof vent valve 9. The battery pack 2 also houses a module 3 and a BMU unit 8, which are electrically connected to the BCU unit 15. The BCU unit 15 is a battery control unit with a buzzer alarm function, responsible for controlling, managing, detecting, or calculating the electrical and thermal parameters of the battery system. The BMU unit 8 is a battery management unit responsible for real-time monitoring of key parameters of individual cells or battery modules, such as voltage, current, and temperature. The BCU unit 15 and BMU unit 8 are existing mature technologies and will not be described further in this embodiment.

[0019] To improve the system's performance in preventing and controlling condensation in the energy storage container 1, the present invention provides multiple temperature sensors, including a module temperature sensor 4 mounted on the module 3, a battery pack housing temperature sensor 5 mounted on the battery pack 2 housing, and a container temperature sensor 10 mounted inside the container 1. A housing heating film 7 is also mounted on the battery pack 2 housing. The housing heating film 7, module temperature sensor 4, battery pack housing temperature sensor 5, and battery pack humidity sensor 6 are all electrically connected to the BMU unit 8. A container humidity sensor 11 and a battery pack humidity sensor 6 are respectively mounted inside the container 1 and inside the battery pack 2. A pressure sensor 12, a dehumidifier 14, and a water immersion sensor 17, electrically connected to the BCU unit 15, are also mounted inside the container 1. The detection end of the water immersion sensor 17 is equipped with a radiator 18 and a flow channel 19. The flow channel 19 communicates with the outside of the container 1 and is positioned near the corner of the container 1. The radiator 18 is located inside the container 1 and away from the container temperature sensor 10 and the container humidity sensor 11.

[0020] Specifically, module temperature sensor 4 collects the temperature t0 of module 3, battery pack housing temperature sensor 5 collects the housing temperature t1, and battery pack humidity sensor 6 collects the humidity RH1 inside battery pack 2. The collected data are transmitted to BCU via BMU. Container temperature sensor 10 collects the temperature t2 of container 1, container humidity sensor 11 collects the humidity RH2 of container 1, and air pressure sensor 12 collects the air pressure P of container 1. Battery pack 2 exchanges gas with container 1 through explosion-proof vent valve 9 to maintain air pressure balance. The collected data are transmitted to BCU.

[0021] More specifically, the BCU calculates the dew point temperature t inside battery pack 2 using the humidity RH1 and air pressure P inside the pack. 露1 The dew point temperature t inside the chamber was calculated using the humidity RH2 and air pressure P. 露2 Compare the temperature t0 of module 3, the temperature t1 of the casing, and the dew point temperature t inside battery pack 2. 露1 If both t0 and t1 are greater than t 露1 If all conditions are met, there is no risk of condensation inside battery pack 2; otherwise, the BCU will control the liquid cooling unit 16 to activate the liquid heating function to increase the temperature t0 of module 3, and activate the dehumidifier 14 to reduce the humidity RH2 inside the box, thereby reducing the humidity RH1 inside the pack. At the same time, it will send a command signal to the BMU to activate the shell heating film 7 to heat and increase the shell temperature t1; compare the temperature t2 of container 1 with the dew point temperature t inside the box. 露2 If t2 is greater than t 露2 If there is no risk of condensation inside container 1, then the BCU will control the air conditioner 13 to activate the heating function to increase the temperature t2 inside container 1, and activate the dehumidifier 14 to reduce the humidity RH2 inside the container, thereby lowering the dew point temperature t inside the container. 露2 .

[0022] To address the issue that the data collected by the acquisition module might not be representative of the entire space due to the relatively large size of container 1, potentially leading to condensation in certain areas, this system addresses this by installing radiators 18 at the corners of container 1. This ensures that most condensation forms on these radiators. Combined with the detection function of a water immersion sensor 17, once condensation forms, the sensor transmits a signal to the BCU (Body Control Unit). The BCU then controls the air conditioner 13 to activate its heating function to raise the temperature t2 of container 1 and activates the dehumidifier 14 to lower the humidity RH2 inside the container. Simultaneously, a drainage channel 19 is installed below the radiator 18, through which the condensate is discharged from container 1. If condensation accumulates too quickly or the drainage channel 19 becomes abnormally blocked, causing the water level to exceed a threshold, the water immersion sensor 17 will transmit a signal to the BCU, causing the BCU control system loop to disconnect and triggering an alarm.

[0023] Furthermore, to improve the sealing performance of container 1 and considering the drainage requirements of the guide channel 19, the guide channel 19 provided by this utility model includes multiple outlet grilles 191 located inside container 1. Each outlet grille 191 has a confluence area 192 in the water outlet direction, and one end of the confluence area 192 has an outlet 193 communicating with the outside of container 1. The diameter of the outlet 193 is less than 2cm × 2cm. This design ensures the drainage requirements of the guide channel 19 while effectively controlling the natural exchange path between the outside and the inside of container 1 using a smaller outlet 193, thus facilitating the system's control over condensation inside container 1.

[0024] To match the active condensation suppression mechanism provided by this system and to improve the temperature control performance of the battery pack 2, the housing heating film 7 provided by this invention is a polyimide heating film and is arranged in pairs on the two inner sidewalls of the battery pack 2 housing. This ensures that the heating film is evenly distributed in space. Furthermore, the polyimide heating film, as an insulator, ensures that the current mainly flows in the conductive heating element, preventing leakage, while also providing good heat resistance and insulation properties, which is beneficial for ensuring the instantaneous heating performance of the housing heating film 7.

[0025] To improve the performance of the air pressure sensor 12 in container 1, the air pressure sensor 12 provided by this invention is a piezoelectric ceramic air pressure sensor. The piezoelectric ceramic air pressure sensor includes a piezoelectric ceramic, a sensing circuit, and a housing. The piezoelectric ceramic exhibits the piezoelectric effect. When subjected to external air pressure, the crystal structure inside the piezoelectric ceramic deforms, causing a relative displacement of the positive and negative charge centers within it, thereby generating a charge on the surface of the piezoelectric ceramic and forming a potential difference. This change in charge or potential difference is directly proportional to the applied air pressure. By measuring these changes in electrical signals, the magnitude of the air pressure can be determined. The piezoelectric ceramic air pressure sensor has advantages such as high sensitivity, fast response, wide measurement range, high stability, and corrosion resistance, effectively adapting to the internal environmental conditions of container 1, thus ensuring its performance in monitoring the air pressure inside container 1.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A condensation prevention and control system for an energy storage container, comprising a container and multiple temperature sensors, wherein a battery pack, an air conditioner, a BCU unit, and a liquid cooling unit are installed inside the container; an explosion-proof vent valve is installed on the battery pack; a module and a BMU unit are installed inside the battery pack; the BMU unit is electrically connected to the BCU unit, characterized in that... The multiple temperature sensors include a module temperature sensor mounted on the module, a battery pack housing temperature sensor mounted on the battery pack housing, and a container temperature sensor mounted inside the container. A housing heating film is also mounted on the battery pack housing. The housing heating film, module temperature sensor, battery pack housing temperature sensor, and battery pack humidity sensor are all electrically connected to the BMU unit. A container humidity sensor and a battery pack humidity sensor are respectively mounted inside the container and inside the battery pack. A pressure sensor, a dehumidifier, and a water immersion sensor, all electrically connected to the BCU unit, are also mounted inside the container. The detection end of the water immersion sensor is equipped with a heat sink and a flow channel. The flow channel communicates with the outside of the container and is positioned near a corner of the container. The heat sink is located inside the container and away from the container temperature sensor and container humidity sensor.

2. The energy storage container condensation prevention and control system according to claim 1, characterized in that, The flow channel includes multiple outlet grilles located inside the container. The outlet grilles have a confluence area in the direction of water discharge. One end of the confluence area is provided with an outlet that communicates with the outside of the container. The diameter of the outlet is less than 2cm × 2cm.

3. The energy storage container condensation prevention and control system according to claim 2, characterized in that, The heating film of the housing is a polyimide heating film and is arranged in pairs on the two inner side walls of the battery pack housing.

4. The energy storage container condensation prevention and control system according to claim 3, characterized in that, The air pressure sensor is a piezoelectric ceramic air pressure sensor.

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