Heat management system for container energy storage

Abstract

The invention discloses a heat management system for container energy storage, and relates to the technical field of energy storage. The system comprises a controller, and the controller is connected with a temperature and humidity detection subsystem, a ventilation and heat dissipation subsystem, an air conditioner subsystem and a liquid cooling subsystem. The ventilation and heat dissipation subsystem comprises a first heat dissipation fan and a second heat dissipation fan which are installed at the two ends of the top of the container. The air blowing directions of the first cooling fan and the second cooling fan are opposite. Through intelligent linkage of the temperature and humidity detection subsystem, the ventilation and heat dissipation subsystem, the air conditioner subsystem and the liquid cooling subsystem, the temperature control precision is + / -1.5 DEG C, and the humidity fluctuation range is reduced; and meanwhile, the three refrigeration and dehumidification systems are matched for use, so that energy consumption can be reduced during actual operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and particularly relates to a thermal management system for container energy storage. Background Art

[0002] With the rapid development of new energy power systems, containerized battery energy storage systems have been widely used in fields such as power grid peak shaving and renewable energy consumption due to their modularity and strong scalability. However, limited by the enclosed space of the container and the high heat generation characteristics during the charging and discharging process of the battery, the thermal management problem has become the core bottleneck restricting the system's safety and service life. In the prior art, subsystems such as ventilation, liquid cooling, and air conditioning mostly adopt independent control strategies and lack a linkage optimization mechanism. For example, the liquid cooling system described in CN20XX5566778D only adjusts the water pump flow according to the battery surface temperature, without considering the influence of ambient temperature and humidity on the heat dissipation efficiency, resulting in continuous high-power operation in low-temperature and dry environments, causing energy waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a thermal management system for container energy storage, which realizes a temperature control accuracy of ±1.5°C and reduces the humidity fluctuation range through the intelligent linkage of a temperature and humidity detection subsystem, a ventilation and heat dissipation subsystem, an air conditioning subsystem, and a liquid cooling subsystem, and solves the problems raised in the background art.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0005] The present invention is a thermal management system for container energy storage, including a controller, the controller is connected to a temperature and humidity detection subsystem, a ventilation and heat dissipation subsystem, an air conditioning subsystem, and a liquid cooling subsystem; the ventilation and heat dissipation subsystem includes a first heat dissipation fan and a second heat dissipation fan installed at both ends of the top of the container; the blowing directions of the first heat dissipation fan and the second heat dissipation fan are opposite; a battery energy storage module is arranged inside the container; the first heat dissipation fan is used to blow ambient air into the container, and the second heat dissipation fan discharges the air inside the container; a drying mechanism is installed inside the container opposite to the first heat dissipation fan; the drying mechanism includes a tubular housing, porous plate A and porous plate B are respectively arranged at the ends of the housing close to and far from the first heat dissipation fan; one side of the porous plate A is connected to a telescopic module, the end of the telescopic module is connected to a movable plate, and a convex ring sliding along the inner wall of the housing is connected to the periphery of the movable plate; a partition is arranged on the inner wall of the chamber between the movable plate and the porous plate B, and a desiccant is filled in the area between the movable plate and the partition; openings A and openings B in a staggered position are respectively arranged on the movable plate and the partition, and a plurality of openings C are arranged on both the porous plate A and the porous plate B; a plurality of openings D are arranged on the periphery of the housing.

[0006] Further, a guide rod and a guide rod sleeve which cooperate with each other are respectively fixed on the movable plate and the porous plate A.

[0007] Further, the temperature and humidity detection subsystem includes a temperature sensor A and a humidity sensor A installed inside the container, and a temperature sensor B and a humidity sensor B installed outside the container.

[0008] Further, the liquid cooling subsystem includes a cooling pipe assembly arranged on the outer peripheral side wall of the battery pack assembly. The water inlet of the cooling pipe assembly is communicated with a water pump, the water outlet of the cooling pipe assembly is communicated with the top of the condensation tower, and the water pump is installed in the water collecting tank of the condensation tower.

[0009] Further, the thermal management method includes the following steps:

[0010] Step 1: If the temperature inside the container detected by the temperature sensor A is higher than the set value A, go to Step 2;

[0011] Step 2: Check whether the humidity inside the container is higher than the preset value through the humidity sensor A. If it is, go to Step 21; otherwise, go to Step 22;

[0012] Step 21: Detect the environmental temperature and humidity through the temperature sensor B and the humidity sensor B;

[0013] When it is detected that both the environmental temperature and the environmental humidity are lower than the set value A and the preset value, go to Step 211;

[0014] When it is detected that the environmental temperature is lower than the set value A and the environmental humidity is higher than the preset value, go to Step 212;

[0015] When it is detected that the environmental temperature is greater than the set value A, go to Step 213;

[0016] Step 211: Dissipate heat from the inside of the container by starting the ventilation and heat dissipation subsystem, and control the movable plate and the partition plate to fit together;

[0017] Step 212: Dissipate heat from the inside of the container by starting the ventilation and heat dissipation subsystem, control the movable plate and the partition plate to move away from each other. At this time, the convex ring 232 blocks the opening D;

[0018] Step 213: Start the air conditioning subsystem for cooling and dehumidifying;

[0019] Step 22: Detect the environmental temperature through the temperature sensor B;

[0020] When it is detected that the environmental temperature is greater than the set value A, go to Step 221;

[0021] When it is detected that the environmental temperature is lower than the set value A, go to Step 222 at this time;

[0022] Step 221: Start the air-conditioning subsystem to cool down.

[0023] Step 222: Start the ventilation and heat dissipation subsystem to dissipate heat inside the container, and control the movable plate and the partition to fit together.

[0024] Further, when the temperature inside the container detected by temperature sensor A is higher than set value B, at this time, when entering Step 2, start the liquid cooling subsystem to dissipate heat.

[0025] Further, the cooling pipe assembly is bent into a snake shape by an aluminum alloy pipe with a wall thickness of 1.5 - 2 mm; the outer wall of the aluminum alloy pipe is closely attached to the surface of the battery pack through a thermal conductive silica gel pad with a thickness of 3 - 5 mm, a thermal conductivity of ≥5 W / (m·K), and the surface of the silica gel pad is provided with a hemispherical protrusion structure arranged in a staggered manner.

[0026] Further, in the condensation tower, a spray device, a packing layer, and a water collection tank are sequentially arranged from top to bottom. The packing layer is stacked by porous ceramic balls with a pore diameter of 5 - 8 mm, and the stacking density is 200 - 250 kg / m 3 ; An axial flow fan is installed on the side wall of the condensation tower, and the fan speed is linked with the water pump flow rate to satisfy the relational expression Q = 0.8V + 20; where Q is the water pump flow rate (L / min) and V is the fan speed (rpm).

[0027] Further, the humidity sensor B is installed in the arc-shaped rain shield at the top of the container. The bottom of the rain shield is provided with a diversion groove with an inclination angle of 15° - 25°, and the inner wall of the rain shield is covered with a hydrophobic coating.

[0028] Further, the temperature sensor B is installed at the top of a wooden vertical rod at the top of the container, and the bottom end of the vertical rod is connected to a column fixed on the top of the container.

[0029] The present invention has the following beneficial effects:

[0030] Through the intelligent linkage of the temperature and humidity detection subsystem, the ventilation and heat dissipation subsystem, the air-conditioning subsystem, and the liquid cooling subsystem, the present invention realizes a temperature control accuracy of ±1.5°C and reduces the humidity fluctuation range; at the same time, the combined use of the three refrigeration and dehumidification systems can reduce energy consumption during actual operation.

[0031] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 Schematic diagram of the installation structure of the ventilation and heat dissipation subsystem on the container of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the drying mechanism of the present invention. Specific embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0037] Please refer to Figure 1-2 As shown, the present invention is a thermal management system for container energy storage, including a controller, a ventilation and heat dissipation subsystem connected to the controller for adjusting the temperature inside the container, an air conditioning subsystem, and a liquid cooling subsystem; and a temperature and humidity detection subsystem for controlling the corresponding startup of the ventilation and heat dissipation subsystem, the air conditioning subsystem, and the liquid cooling subsystem.

[0038] Specifically, the temperature and humidity detection subsystem includes a temperature sensor A and a humidity sensor A installed inside the container 1, and a temperature sensor B and a humidity sensor B installed outside the container 1.

[0039] Based on the above settings, when in use, in order to clean the humidity outside the container 1 and select whether to dry the gas sent into the container 1 by the ventilation and heat dissipation subsystem, the ventilation and heat dissipation subsystem provided by the present invention includes a first heat dissipation fan 10 and a second heat dissipation fan 11 installed at both ends of the top of the container 1; the blowing directions of the first heat dissipation fan 10 and the second heat dissipation fan 11 are opposite to form a forced convection air duct. A drying mechanism 2 is arranged at the air outlet of the first heat dissipation fan 10. Then, when in use, the drying mechanism 2 needs to be controlled to adjust whether the desiccant 26 filled inside the drying mechanism 2 dries the gas sent into the container 1.

[0040] Therefore, as Figure 2 shown, the drying mechanism 2 provided by the present invention is installed on the inner wall of the container 1, and the drying mechanism 2 includes a tubular housing 20. Porous plates A21 and porous plates B25 are respectively arranged at the ends of the housing 20 close to and far from the first heat dissipation fan 10; one side of the porous plate A21 is connected to a telescopic module 22, and the end of the telescopic module 22 is connected to a movable plate 23. A convex ring 232 that slides along the inner wall of the housing 20 is connected to the periphery of the movable plate 23; a partition 24 is arranged on the inner wall of the storage body between the movable plate 23 and the porous plate B25, and a desiccant 26 is filled in the area between the movable plate 23 and the partition 24; openings A231 and openings B241 that are offset are respectively arranged on the movable plate 23 and the partition 24, and a number of openings C211 are arranged on both the porous plate A21 and the porous plate B25; a number of openings D201 are arranged on the periphery of the housing 20; furthermore, based on the above settings, when the telescopic module 22 is controlled to extend so that the movable plate 23 and the partition 24 are in contact, the air sent by the first heat dissipation fan 10 is directly sent into the container 1 through the opening D201 at this time; on the contrary, when the telescopic module 22 is controlled to contract so that the movable plate 23 and the partition 24 are separated, at this time the convex ring 232 blocks the opening D201, then the air sent by the first heat dissipation fan 10 is dried by the movable plate 23, the partition 24, and the desiccant 26 and then sent into the container 1 through the porous plate B25.

[0041] When in use, in order to facilitate the replacement of the desiccant 26, the desiccant 26 is filled in a tubular container, the end of the container is bolted with a metal mesh, and the porous plate B25 is bolted to the inner wall of the housing 20.

[0042] And a guide rod 28 and a guide rod sleeve 28 that cooperate with each other are respectively fixed on the movable plate 23 and the porous plate A21, so as to facilitate the control of the stability of the movement of the movable plate 23 when in use.

[0043] The liquid cooling subsystem provided by the present invention includes a cooling pipe assembly arranged on the outer peripheral side wall of the battery pack assembly. The water inlet of the cooling pipe assembly is communicated with a water pump, and the water outlet of the cooling pipe assembly is communicated with the top of the condensing tower. The water pump is installed in the water collecting tank of the condensing tower.

[0044] The cooling pipe assembly is bent into a serpentine shape by an aluminum alloy pipe with a wall thickness of 1.5 - 2 mm; the outer wall of the aluminum alloy pipe is closely attached to the surface of the battery pack through a thermal conductive silicone pad with a thickness of 3 - 5 mm, a thermal conductivity coefficient ≥ 5 W / (m·K), and the surface of the silicone pad is provided with a hemispherical convex structure arranged in a staggered manner. Furthermore, the liquid cooling subsystem adopts a combination of a serpentine pipe and a high - thermal - conductivity silicone pad of 5 W / (m·K), so that the temperature difference of the battery module ≤ 1.8 °C (the national standard requirement is ≤ 5 °C), and the battery surface temperature can still be maintained ≤ 38 °C at an ambient temperature of 45 °C.

[0045] The humidity sensor B is installed in the arc - shaped rain - proof cover on the top of the container 1. The bottom of the rain - proof cover is provided with a diversion groove with an inclination angle of 22°, and the inner wall of the rain - proof cover is covered with a hydrophobic coating. The cooperation of the diversion groove and the hydrophobic coating of the rain - proof cover can effectively prevent rainwater from invading and ensure the measurement error of the external humidity sensor in heavy rain weather.

[0046] The temperature sensor B is installed at the top of a wooden vertical rod on the top of the container 1. A wooden sun - shield is also set at the top of the vertical rod. The temperature sensor B is installed directly below the sun - shield. The bottom end of the vertical rod is connected to a column fixed on the top of the container 1. Based on the above, the temperature sensor B is far away from the container 1, avoiding the influence of the high temperature caused by the sunlight exposure of the container 1 on the accuracy of the detection result of the environmental air temperature by the temperature sensor B.

[0047] Inside the condensing tower, a spray device, a packing layer, and a water collection tank are arranged in sequence from top to bottom. The packing layer is stacked by porous ceramic balls with a pore diameter of 5 - 8 mm, and the stacking density is 200 - 250 kg / m 3 ; An axial - flow fan is installed on the side wall of the condensing tower, and the fan speed is linked with the water pump flow rate to meet the relationship Q = 0.8V + 20; where Q is the water pump flow rate (L / min) and V is the fan speed (rpm); the power density of the integrated electric heating belt in the condensing tower is 200 W / m 2 , and it is automatically started when the detected cooling water temperature < 5 °C to avoid pipeline freezing.

[0048] Furthermore, the thermal management method includes the following steps:

[0049] Step 1: If the temperature inside the container 1 detected by the temperature sensor A is higher than 35 °C, then go to Step 2;

[0050] Step 2: Check whether the humidity inside the container 1 detected by the humidity sensor A is higher than 60% RH. If it is, go to Step 21; otherwise, go to Step 22;

[0051] Step 21: Detect the environmental temperature and humidity through the temperature sensor B and the humidity sensor B;

[0052] When it is detected that both the ambient temperature and the ambient humidity are lower than 35°C and 60%RH, proceed to step 211;

[0053] When it is detected that the ambient temperature is lower than 35°C and the ambient humidity is higher than 60%RH, proceed to step 212;

[0054] When it is detected that the ambient temperature is greater than 35°C, proceed to step 213;

[0055] Step 211: Dissipate heat from the interior of the container 1 by starting the ventilation and heat dissipation subsystem, and control the movable plate 23 and the partition plate 24 to fit together;

[0056] Step 212: Dissipate heat from the interior of the container 1 by starting the ventilation and heat dissipation subsystem, control the movable plate 23 and the partition plate 24 to move away from each other. At this time, the convex ring 232 blocks the opening D201;

[0057] Step 213: Start the air conditioning subsystem to cool down and dehumidify;

[0058] Step 22: Detect the ambient temperature through the temperature sensor B;

[0059] When it is detected that the ambient temperature is greater than 35°C, proceed to step 221;

[0060] When it is detected that the ambient temperature is lower than 35°C, proceed to step 222 at this time;

[0061] Step 221: Start the air conditioning subsystem to cool down;

[0062] Step 222: Dissipate heat from the interior of the container 1 by starting the ventilation and heat dissipation subsystem, and control the movable plate 23 and the partition plate 24 to fit together.

[0063] When it is detected by the temperature sensor A that the temperature inside the container 1 is higher than 40°C, at this time, when proceeding to step 2, start the liquid cooling subsystem to dissipate heat.

[0064] In the description of this specification, the description with reference to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A thermal management system for container energy storage, characterized in that: It includes a controller, which is connected to the temperature and humidity detection subsystem, the ventilation and heat dissipation subsystem, the air conditioning subsystem and the liquid cooling subsystem; The ventilation and heat dissipation subsystem comprises a heat dissipation fan 1 (10) and a heat dissipation fan 2 (11) installed at two ends of the top of the container (1); the air blowing directions of the heat dissipation fan 1 (10) and the heat dissipation fan 2 (11) are opposite; A battery energy storage module is arranged in the container (1); The cooling fan 1 (10) is used to blow ambient air into the container (1), and the cooling fan 2 (11) is used to exhaust the air in the container (1); A drying mechanism (2) is installed in the container (1) directly opposite to the cooling fan (10); The drying mechanism (2) comprises a tubular housing (20), and a porous plate A (21) and a porous plate B (25) are respectively arranged at the ends of the housing (20) close to and far from the cooling fan 1 (10); One side of the porous plate A (21) is connected to a telescopic module (22), an end of the telescopic module (22) is connected to a movable plate (23), and a convex ring (232) that slides along the inner wall of the shell (20) is connected to the peripheral side of the movable plate (23); A partition (24) is disposed on the inner wall of the storage body (1) between the movable plate (23) and the porous plate B (25); a desiccant (26) is filled in the area between the movable plate (23) and the partition (24); the movable plate (23) and the partition (24) are respectively provided with an opening A (231) and an opening B (241) that are offset; the porous plate A (21) and the porous plate B (25) are both provided with a plurality of openings C (211); and a plurality of openings D (201) are provided on the peripheral side of the shell (20).

2. A thermal management system for container energy storage according to claim 1, characterized in that: The movable plate (23) and the porous plate A (21) are respectively fixed with a guide rod (28) and a guide rod sleeve (28) which cooperate with each other.

3. A thermal management system for container energy storage according to claim 1, characterized in that: The temperature and humidity detection subsystem comprises a temperature sensor A and a humidity sensor A installed inside the container (1), and a temperature sensor B and a humidity sensor B installed outside the container (1).

4. A thermal management system for container energy storage according to claim 3, characterized in that: The liquid cooling subsystem includes a cooling pipe assembly arranged on the outer peripheral side wall of the battery pack assembly, the water inlet of the cooling pipe assembly is connected to a water pump, the water outlet of the cooling pipe assembly is connected to the top of the condensation tower, and the water pump is installed in the water collection tank of the condensation tower.

5. A thermal management system for container energy storage according to claim 4, characterized in that: The thermal management method includes the following steps: Step 1: If the temperature in the container (1) is detected by the temperature sensor A to be higher than the set value A, then proceed to step 2; Step 2, using the humidity sensor A to detect whether the humidity in the container (1) is higher than a preset value, if yes, proceed to step 21, otherwise proceed to step 22; Step 21, detecting the ambient temperature and humidity through the temperature sensor B and the humidity sensor B; When it is detected that the ambient temperature and the ambient humidity are both lower than the set value A and the preset value, the process goes to step 211; When it is detected that the ambient temperature is lower than the set value A and the ambient humidity is higher than the preset value, step 212 is entered; When it is detected that the ambient temperature is greater than the set value A, the process proceeds to step 213; Step 211, dissipating heat inside the container (1) by starting the ventilation and heat dissipation subsystem, and controlling the movable plate (23) and the partition plate (24) to fit together; Step 212, the ventilation and heat dissipation subsystem is activated to dissipate heat inside the container (1), and the movable plate (23) and the partition plate (24) are controlled to move away from each other, and at this time, the convex ring 232 covers the opening D (201); Step 213, start the air conditioning subsystem to cool down and dehumidify; Step 22: Detect the ambient temperature through the temperature sensor B; When it is detected that the ambient temperature is greater than the set value A, the process proceeds to step 221; When it is detected that the ambient temperature is lower than the set value A, the process proceeds to step 222; Step 221, start the air conditioning subsystem to cool down; Step 222, dissipate heat inside the container (1) by starting the ventilation and heat dissipation subsystem, and control the movable plate (23) and the partition plate (24) to fit together.

6. A thermal management system for container energy storage according to claim 5, characterized in that: When the control detects through the temperature sensor A that the temperature inside the container (1) is higher than the set value B, the control enters step 2 and starts the liquid cooling subsystem to dissipate heat.

7. A thermal management system for container energy storage according to claim 5, characterized in that: The cooling pipe assembly is made of an aluminum alloy pipe with a wall thickness of 1.5-2mm bent into a serpentine shape; the outer wall of the aluminum alloy pipe is tightly fitted to the surface of the battery pack through a thermally conductive silicone pad, the thickness of the thermally conductive silicone pad is 3-5mm, the thermal conductivity coefficient is ≥5W / (m·K), and the surface of the silicone pad is provided with staggered hemispherical protrusion structures.

8. The thermal management system for container energy storage according to claim 5, characterized in that: The condensation tower is provided with a spray device, a packing layer and a water collection tank from top to bottom. The packing layer is stacked with porous ceramic balls with a pore size of 5-8 mm and a stacking density of 200-250 kg / m 3 ; An axial flow fan is installed on the side wall of the condensation tower, and the fan speed is linked to the water pump flow rate to satisfy the relationship Q=0.8V+20; where Q is the water pump flow rate (L / min) and V is the fan speed (rpm).

9. A thermal management system for container energy storage according to claim 5, characterized in that: The humidity sensor B is installed in the arc-shaped rain shield on the top of the container (1), the bottom of the rain shield is provided with a guide groove with an inclination angle of 15°-25°, and the inner wall of the rain shield is covered with a hydrophobic coating.

10. A thermal management system for container energy storage according to claim 5, characterized in that: The temperature sensor B is installed on the top of a wooden vertical rod on the top of the container (1), and the bottom end of the vertical rod is connected to a column fixed on the top of the container (1).

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