A temperature control system and method for container energy storage device based on phase change cooling

Abstract

The present invention discloses a temperature control system and method for a container energy storage device based on phase change cooling, and relates to the technical field of battery heat preservation and heat dissipation. It includes a battery compartment; a control room, wherein a first phase change material recovery chamber, a second phase change material recovery chamber, a system control cabinet and a material tank are arranged inside the control room, the first phase change material recovery chamber and the second phase change material recovery chamber are connected in the control room, the system control cabinet is connected to the first phase change material recovery chamber, the second phase change material recovery chamber is provided with a third liquid pipeline, the second phase change material recovery chamber is connected to the material tank, and the battery compartment is connected to the material tank and the first phase change material recovery chamber through a pipeline; a temperature control mechanism, wherein the temperature control mechanism is connected to the first phase change material recovery chamber, the second phase change material recovery chamber, the material tank and the battery compartment through a pipeline, and the temperature control mechanism is electrically connected to the system control cabinet. The present invention combines a liquid cooling device with a phase change material, and the temperature control effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat preservation and heat dissipation, and in particular to a temperature control system and method for a container energy storage device based on phase change cooling. Background Art

[0002] Lithium batteries are the core components of container energy storage systems and have strict requirements on operating temperature. Normally, the closely arranged battery packs in the energy storage box will generate a lot of heat during charging and discharging. If they cannot be discharged quickly, heat accumulation and large operating temperature differences will occur between the battery packs. This requires reliable heat dissipation to maintain normal operation of the system. When the system is in a low temperature environment and has not been used for a long time, the battery pack temperature cannot reach the minimum operating temperature, and measures need to be taken to heat up the battery pack. In addition, in order to maintain the normal operation of the system in a low temperature environment, the system control cabinet needs to be insulated.

[0003] At present, the most commonly used cooling method for energy storage containers is air cooling, and some high-end products use liquid cooling. Air cooling has a simple structure, is easy to install, and has a low cost, but it cannot meet the heat dissipation requirements of large-capacity energy storage systems, and the temperature difference between the inlet and outlet battery packs is large, that is, the battery heat dissipation is uneven; liquid cooling is better than air cooling, but the system is complex, bulky, expensive, and difficult to install and maintain, so it cannot be widely used; the existing phase change material cooling technology covers the phase change material on the battery surface or clamps it between adjacent batteries, which has shown good thermal efficiency in experiments, but the phase change material itself does not have the ability to dissipate heat, and a liquid cooling device must be installed to cooperate with heat dissipation.

[0004] Therefore, it is necessary to provide a temperature control system and method for a container energy storage device based on phase change cooling that combines a liquid cooling device with a phase change material. Summary of the invention

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A temperature control system for a container energy storage device based on phase change cooling, comprising:

[0007] A battery compartment, wherein a battery module is arranged inside the battery compartment;

[0008] A control room, wherein a first phase change material recovery chamber, a second phase change material recovery chamber, a system control cabinet and a material tank are arranged inside the control room, wherein the first phase change material recovery chamber and the second phase change material recovery chamber are respectively connected to the inner wall of the control room, the system control cabinet is connected to one side of the first phase change material recovery chamber, a third liquid pipeline is arranged at the bottom end of the second phase change material recovery chamber, the second phase change material recovery chamber is connected to the material tank through the third liquid pipeline, and the bottom end of the battery compartment is respectively connected to the material tank and the first phase change material recovery chamber through pipelines;

[0009] A temperature control mechanism is arranged between the battery compartment and the control room. The temperature control mechanism is connected to the first phase change material recovery chamber, the second phase change material recovery chamber, the material tank and the battery compartment through pipelines respectively. The temperature control mechanism is electrically connected to the system control cabinet.

[0010] Furthermore, the battery module includes a plurality of battery pack sealed cavities, an atomization device and a battery rack are installed on the inner wall of the battery pack sealed cavity, an inclined baffle is installed below the battery rack, and the lower part of the inclined baffle is connected to the inner wall of the battery pack sealed cavity to form a liquid collection groove.

[0011] Furthermore, the battery pack sealed cavity is provided with an inner sealed door and an outer sealed door, the bottom end of the inner sealed door is connected to the inclined baffle, the top end of the inner sealed door is connected to the top end of the battery pack sealed cavity, the outer sealed door is connected to the outside of the battery pack sealed cavity, the battery pack sealed cavity, the inclined baffle and the inner sealed door form an inner heat exchange space, the battery pack sealed cavity, the inclined baffle, the outer sealed door and the inner sealed door form an outer space, and the outer space is used to place the junction box.

[0012] Furthermore, the atomizing device includes an atomizing nozzle and a rotating disk, wherein the atomizing nozzle is connected to the top of the battery pack sealed cavity, and the rotating disk is connected to the side wall of the battery pack sealed cavity away from the battery rack.

[0013] Furthermore, a first liquid pipeline and a second gas pipeline are arranged at the top of the battery compartment, and a second liquid pipeline is arranged at the bottom; the first liquid pipeline, the second gas pipeline and the second liquid pipeline are all connected to the sealed cavity of the battery pack; the second liquid pipeline is connected to the material tank through a first branch; a second liquid pump is arranged on the first branch; and the second liquid pipeline is connected to the first phase change material recovery cavity through a second branch.

[0014] Furthermore, a hydraulic regulating device is provided between the top of the battery pack sealed cavity and the first liquid pipeline, and the atomizing nozzle is connected to the hydraulic regulating device.

[0015] Furthermore, the temperature control mechanism includes an air pump and a heating device, the air pump and the heating device are arranged between the battery compartment and the control chamber, the material tank is connected to the heating device through a third branch, a first liquid pump is arranged on the third branch, the third branch is connected to the first liquid pipeline through a fourth branch, a second valve is arranged on the third branch between the fourth branch and the heating device, a first valve is arranged on the fourth branch, a first gas pipeline is arranged on one side of the second phase change material recovery chamber, a third valve is arranged on the first gas pipeline, the third valve is used to control the opening and closing of the first gas pipeline, and the first gas pipeline is connected to the first liquid pipeline through a fifth branch. The heating device is connected, a sixth valve is arranged on the fifth branch, a third gas pipeline is arranged on one side of the top of the first phase change material recovery chamber, the first gas pipeline is connected to the middle section of the third gas pipeline through the sixth branch, one end of the third gas pipeline is connected to the air pump, the end of the air pump away from the third gas pipeline is connected to the second gas pipeline through the seventh branch pipeline, a seventh valve is arranged on the seventh branch, the end of the air pump away from the third gas pipeline is connected to the third gas pipeline through the eighth branch, a fourth valve is arranged on the eighth branch, and a fifth valve is arranged on the third gas pipeline between the eighth branch and the sixth branch.

[0016] Furthermore, an air pressure regulating device is connected to one side of the air pump, and the air pressure regulating device is used to adjust and change the internal air pressure of the system and ensure sealing.

[0017] Furthermore, the heating device is a double-layer rectangular box, the inner layer is a sealed cavity and is connected to the third branch and the fifth branch respectively, the outer layer is a heat-insulating layer, and a heating plate is installed between the inner layer and the outer layer.

[0018] A temperature control method for a container energy storage device based on phase change cooling comprises the following steps:

[0019] When the battery temperature is too high, it enters the heat dissipation mode. In the heat dissipation mode, the first valve, the third valve and the seventh valve are opened, and the second valve, the fourth valve, the fifth valve and the sixth valve are closed. The phase change material in the material tank enters the sealed cavity of the battery pack under the action of the first liquid pump to cool the battery. The phase change material vaporizes after being heated and flows into the air pump through the second gas pipeline. Under the action of the air pump, the phase change material flows into the second phase change material recovery cavity. The second phase change material recovery cavity is connected with the material tank to form a heat dissipation cycle;

[0020] When the battery temperature is too low, it enters the insulation mode. In the insulation mode, the second valve, the sixth valve and the seventh valve are opened, and the first valve, the third valve, the fourth valve and the fifth valve are closed. The phase change material in the material tank enters the heating device for heating under the action of the first liquid pump, and the heated and vaporized phase change material enters the air pump. Under the action of the air pump, it enters the sealed cavity of the battery pack through the second gas pipeline to insulate the battery. After the phase change material is cooled, it liquefies and flows back to the material tank under the action of the second liquid pump, forming a insulation cycle.

[0021] The beneficial effects of the present invention are:

[0022] 1. An atomizing device is provided to fully diffuse the liquid phase change material. The atomized liquid phase change material fully diffuses in the cavity and generates heat convection. The battery is cooled by using the heat convection and phase change principles, which can meet greater heat dissipation requirements and ensure heat dissipation effects.

[0023] 2. Setting up multiple battery pack sealed cavities allows each battery pack to dissipate heat independently, which can not only reduce the temperature difference between battery packs, but also make the structure modular. Compared with liquid cooling, it can reduce weight, simplify structure, and facilitate installation and maintenance while ensuring reliable heat dissipation.

[0024] 3. When in heat dissipation mode, the liquid phase change material vaporizes and absorbs heat in the low-pressure battery pack sealed cavity, and is sucked into the high-pressure phase change material recovery cavity by the air pump to liquefy and release heat, which can directly transfer the heat absorbed from the battery without the need for other methods to cooperate with heat dissipation.

[0025] 4. In low temperature environment, the heat discharged by the battery pack during operation can be used to keep the control components warm, thus reducing energy consumption and achieving good economy.

[0026] 5. The system's thermal insulation and heat dissipation modes share multiple pipes. The system's operating mode can be switched by changing the air pump's extraction direction and the opening and closing of valves, which simplifies the structure and facilitates installation and maintenance.

[0027] 6. When the system is in the insulation mode, the gas phase change material is liquefied to release heat to heat up the battery pack. The temperature of the battery pack is consistent during the heating process, and there will be no local overheating, with a good safety factor.

[0028] 7. The phase change cooling method has better cooling effect than air cooling and can meet greater heat dissipation needs; compared with liquid cooling, it can reduce weight and simplify structure under the premise of reliable heat dissipation, which is convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a temperature control system of a container energy storage device based on phase change cooling of the present invention.

[0030] Figure 2 for Figure 1Enlarged view of the AA part.

[0031] Figure 3 It is a bottom view of a temperature control system of a container energy storage device based on phase change cooling of the present invention.

[0032] Figure 4 This is an external schematic diagram of a battery module of a temperature control system for a container energy storage device based on phase change cooling according to the present invention.

[0033] Figure 5 The figure is a schematic diagram of the internal structure of a battery module of a temperature control system of a container energy storage device based on phase change cooling according to the present invention.

[0034] Figure 6 The present invention is a flowchart of a temperature control system for a container energy storage device based on phase change cooling.

[0035] Among them, in the figure:

[0036] 10-battery compartment; 11-battery module; 12-battery pack sealed chamber; 13-atomizer; 131-atomizer nozzle; 132-rotating disk; 14-battery rack; 15-inclined baffle; 16-inner sealed door; 17-outer sealed door; 101-first liquid pipeline; 102-second gas pipeline; 103-second liquid pipeline; 104-first gas pipeline; 105-third gas pipeline; 2-control room; 21-first phase change material recovery chamber; 22-second phase change material recovery chamber; 221-third liquid pipeline; 23-system control Cabinet making; 24-material tank; 3-temperature control mechanism; 31-air pump; 32-heating device; 33-first liquid pump; 34-second liquid pump; 41-first branch; 42-second branch; 43-third branch; 44-fourth branch; 45-fifth branch; 46-sixth branch; 47-seventh branch; 48-eighth branch; 51-first valve; 52-second valve; 53-third valve; 54-fourth valve; 55-fifth valve; 56-sixth valve; 57-seventh valve; 6-hydraulic regulating device; 7-air pressure regulating device. DETAILED DESCRIPTION

[0037] The following will be combined with the attached embodiment of the present invention Figure 1 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] Combination Figure 1The present embodiment provides a temperature control system for a container energy storage device based on phase change cooling, including a battery compartment 10, a control room 2 and a temperature control mechanism 3, wherein a battery module 11 is arranged inside the battery compartment 10, and a first phase change material recovery chamber 21, a second phase change material recovery chamber 22, a system control cabinet 23 and a material tank 24 are arranged inside the control room 2, wherein the first phase change material recovery chamber 21 and the second phase change material recovery chamber 22 are respectively connected to the inner wall of the control room 2, the system control cabinet 23 is connected to one side of the first phase change material recovery chamber 21, and the second phase change material recovery chamber 22 is connected to the inner wall of the control room 2. A third liquid pipeline 221 is provided at the bottom end, the second phase change material recovery chamber 22 is connected to the material tank 24 through the third liquid pipeline 221, and the bottom end of the battery compartment 10 is connected to the material tank 24 and the first phase change material recovery chamber 21 through pipelines, respectively. The temperature control mechanism 3 is arranged between the battery compartment 10 and the control room 2, and the temperature control mechanism 3 is respectively connected to the first phase change material recovery chamber 21, the second phase change material recovery chamber 22, the material tank 24 and the battery compartment 10 through pipelines, and the temperature control mechanism 3 is electrically connected to the system control cabinet 23.

[0040] The battery module 11 includes a plurality of battery pack sealed cavities 12, on the inner wall of which an atomizer 13 and a battery rack 14 are installed, on which batteries are installed, and below which an inclined baffle 15 is installed, and below which the inclined baffle 15 is connected to the inner wall of the battery pack sealed cavity 12 to form a liquid collection trough, which is more convenient for collecting liquid phase change materials at the bottom of the battery pack sealed cavity; the battery pack sealed cavity 12 is provided with an inner sealing door 16 and an outer sealing door 17, The bottom end of the inner sealed door 16 is connected to the inclined baffle 15, the top of the inner sealed door 16 is connected to the top of the battery pack sealed cavity 12, the outer sealed door 17 is connected to the outside of the battery pack sealed cavity 12, the battery pack sealed cavity 12, the inclined baffle 15 and the inner sealed door 16 form an inner heat exchange space, the battery pack sealed cavity 12, the inclined baffle 15, the outer sealed door 17 and the inner sealed door 16 form an outer space, and the outer space is used to place a junction box to facilitate electrical connection of the device.

[0041] The atomizing device 13 includes an atomizing nozzle 131 and a rotating disk 132. The atomizing nozzle 131 is connected to the top of the battery pack sealed cavity 12. The atomizing nozzle 131 can atomize the phase change material to make the effect on the battery more uniform. The rotating disk 132 is connected to the side wall of the battery pack sealed cavity 12 away from the battery rack 14. In this embodiment, the rotating disk 132 is driven to rotate by a motor. The operation of the rotating disk 132 ensures that the atomized liquid phase change material is fully diffused and generates a heat dissipation effect of thermal convection, thereby improving the heat dissipation performance of the system.

[0042] A first liquid pipeline 101 and a second gas pipeline 102 are arranged at the top of the battery compartment 10, and a second liquid pipeline 103 is arranged at the bottom. The first liquid pipeline 101, the second gas pipeline 102 and the second liquid pipeline 103 are all connected to the battery pack sealed cavity 12, one end of the second liquid pipeline 103 is connected to the material tank 24 through the first branch 41, and the other end is connected to the liquid collecting tank. A second liquid pump 34 is arranged on the first branch 41, and the second liquid pipeline 103 is connected to the first phase change material recovery cavity 21 through the second branch 42.

[0043] A hydraulic adjustment device 6 is provided between the top of the battery pack sealed cavity 12 and the first liquid pipeline 101 , and the atomizing nozzle 131 is connected to the hydraulic adjustment device 6 to achieve hydraulic adjustment in the atomizing nozzle 131 .

[0044] The temperature control mechanism 3 includes an air pump 31 and a heating device 32, the air pump 31 and the heating device 32 are arranged between the battery compartment 10 and the control chamber 2, the material tank 24 is connected to the heating device 32 through a third branch 43, a first liquid pump 33 is arranged on the third branch 43, the third branch 43 is connected to the first liquid pipeline 101 through a fourth branch 44, a second valve 52 is arranged on the third branch 43 between the fourth branch 44 and the heating device 32, a first valve 51 is arranged on the fourth branch 44, a first gas pipeline 104 is arranged on one side of the second phase change material recovery chamber 22, a third valve 53 is arranged on the first gas pipeline 104, the third valve 53 is used to control the opening and closing of the first gas pipeline 104, the first gas pipeline 104 is connected to the The heating device 32 is connected, a sixth valve 56 is provided on the fifth branch 45, a third gas pipeline 105 is provided on one side of the top of the first phase change material recovery chamber 21, the first gas pipeline 104 is connected to the middle section of the third gas pipeline 105 through the sixth branch 46, one end of the third gas pipeline 105 is connected to the air pump 31, the end of the air pump 31 away from the third gas pipeline 105 is connected to the second gas pipeline 102 through the seventh branch 47, a seventh valve 57 is provided on the seventh branch 47, the end of the air pump 31 away from the third gas pipeline 105 is connected to the third gas pipeline 105 through the eighth branch 48, the fourth valve 54 is provided on the eighth branch 48, and a fifth valve 55 is provided on the third gas pipeline 105 between the eighth branch 48 and the sixth branch 46.

[0045] As an optimization, an air pressure regulating device 7 is connected to one side of the air pump 31, and the air pressure regulating device 7 is used to adjust and change the internal air pressure of the system and ensure sealing; the heating device 32 is a double-layer rectangular box, the inner layer is a sealed cavity and is respectively connected to the third branch 43 and the fifth branch 45, and the outer layer is an insulation layer. A heating plate is installed between the inner and outer layers. The double-layer structure facilitates heating and insulation and is more practical.

[0046] Embodiment 2

[0047] A temperature control method for a container energy storage device based on phase change cooling is implemented by a temperature control system for a container energy storage device based on phase change cooling disclosed in Example 1, and includes the following steps:

[0048] When the battery temperature is too high, it enters the heat dissipation mode. In the heat dissipation mode, the first valve, the third valve and the seventh valve are opened, and the second valve, the fourth valve, the fifth valve and the sixth valve are closed. The phase change material in the material tank enters the sealed cavity of the battery pack under the action of the first liquid pump to cool the battery. The phase change material vaporizes after being heated and flows into the air pump through the second gas pipeline. Under the action of the air pump, the phase change material flows into the second phase change material recovery cavity. The second phase change material recovery cavity is connected with the material tank to form a heat dissipation cycle;

[0049] When the battery temperature is too low, it enters the insulation mode. In the insulation mode, the second valve, the sixth valve and the seventh valve are opened, and the first valve, the third valve, the fourth valve and the fifth valve are closed. The phase change material in the material tank enters the heating device for heating under the action of the first liquid pump, and the heated and vaporized phase change material enters the air pump. Under the action of the air pump, it enters the sealed cavity of the battery pack through the second gas pipeline to insulate the battery. After the phase change material is cooled, it liquefies and flows back to the material tank under the action of the second liquid pump, forming a insulation cycle.

[0050] Furthermore, the temperature control method of a container energy storage device based on phase change cooling disclosed in this embodiment includes a first phase change material recovery path, a second phase change material recovery path, a third phase change material recovery path and a fourth phase change material recovery path, wherein the first phase change material recovery path and the second phase change material recovery path are used for the heat dissipation process, and the third phase change material recovery path and the fourth phase change material recovery path are used for the heat preservation process.

[0051] Liquid phase change material input path: the first valve is opened, the second valve is closed, and the phase change material in the material tank is input into the first liquid pipeline.

[0052] Gas phase change material input path: the first valve is closed, the second valve is opened, and the phase change material in the material tank is heated by the heating device and input into the air pump.

[0053] The first phase change recovery path: open the first valve, the third valve and the seventh valve, and close the fourth valve, the fifth valve and the sixth valve; when operating along the first phase change recovery path, the gaseous phase change material is recovered and the battery pack is in a heat dissipation state.

[0054] The second phase change recovery path: open the first valve, the third valve, the fifth valve and the seventh valve, and close the fourth valve and the sixth valve; when operating with the second phase change recovery path, the gaseous phase change material is recovered, and the system control cabinet is kept warm while the battery pack is in a heat dissipation state.

[0055] The third phase change recovery path: open the second valve, the fourth valve, the sixth valve and the seventh valve, and close the first valve, the third valve and the fifth valve; when operating with the third phase change recovery path, the gaseous phase change material is recovered to keep the battery pack and the system control cabinet warm.

[0056] The fourth phase change recovery path: open the second valve, the fourth valve and the sixth valve, and close the first valve, the third valve, the fifth valve and the seventh valve; when operating with the fourth phase change recovery path, the gaseous phase change material is recovered, and the battery pack is no longer insulated, and only the system control cabinet is insulated.

[0057] The specific working conditions of the temperature control system of the container energy storage device based on phase change cooling are as follows: Figure 6 shown.

[0058] Specifically, the working process includes:

[0059] S101: Collecting ambient temperature t.

[0060] S102: Determine the relationship between the ambient temperature t and the primary determination temperature t1. When t>t1, the system enters a heat dissipation mode.

[0061] S103: setting the secondary determination temperature to t2, if t<t2, opening the second phase change recovery path; if t>t2, opening the first phase change recovery path.

[0062] S104: The air pump draws air to reduce the air pressure in the sealed cavity of the battery pack.

[0063] S105: Collect the battery temperature T, determine the relationship between the battery temperature T and the third judgment temperature t3, if T<t3, proceed to the next temperature judgment; if T>t3, open the liquid phase change material input path, and control the atomizing nozzle and the rotating disk to work, and proceed to the next temperature judgment after the work is completed.

[0064] S106: Determine the relationship between the battery temperature T and the fourth judgment temperature t4. If T<t4, the system enters the standby state; if T>t4, the atomizing nozzle and the rotating disk are controlled to cool the battery. Repeat this step until T<t4, and finally the system enters the standby state.

[0065] S202: After step S101, determine the relationship between the ambient temperature t and t1. When t<t1, the system enters the insulation mode.

[0066] S203: Collect the battery temperature T, determine the relationship between the battery temperature T and the third judgment temperature t3, if T<t3, open the third phase change material recovery path; if T>t3, the system enters the heat dissipation mode and starts step S102 and subsequent steps.

[0067] S204: After the third phase change material recovery path is opened, the air pump takes in air to increase the air pressure in the sealed cavity of the battery pack.

[0068] S205: The gas phase change material input path is opened.

[0069] S206: Determine the relationship between T and the fourth determination temperature t4 again. If T<t4, close the third phase change material recovery path and open the fourth phase change material recovery path; if T>t4, repeat step S203.

[0070] In this embodiment, t1 represents the lowest temperature at which the battery pack can be started; t2 represents the lowest temperature at which the control system can work normally; t3 represents the highest temperature in the optimal working range of the battery; t4 represents the lowest temperature in the optimal working range of the battery; the optimal working temperature range of the battery is t4~t3, and the specific value is related to the material used to make the battery.

[0071] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature control system for a container energy storage device based on phase change cooling, characterized in that: include: A battery compartment, wherein a battery module is arranged inside the battery compartment; A control room, wherein a first phase change material recovery chamber, a second phase change material recovery chamber, a system control cabinet and a material tank are arranged inside the control room, wherein the first phase change material recovery chamber and the second phase change material recovery chamber are respectively connected to the inner wall of the control room, the system control cabinet is connected to one side of the first phase change material recovery chamber, a third liquid pipeline is arranged at the bottom end of the second phase change material recovery chamber, the second phase change material recovery chamber is connected to the material tank through the third liquid pipeline, and the bottom end of the battery compartment is respectively connected to the material tank and the first phase change material recovery chamber through pipelines; A temperature control mechanism, the temperature control mechanism is arranged between the battery compartment and the control room, the temperature control mechanism is respectively connected to the first phase change material recovery chamber, the second phase change material recovery chamber, the material tank and the battery compartment through pipelines, and the temperature control mechanism is electrically connected to the system control cabinet; The battery module comprises a plurality of battery pack sealed cavities, an atomization device and a battery rack are installed on the inner wall of the battery pack sealed cavity, an inclined baffle is installed below the battery rack, and the lower part of the inclined baffle is connected to the inner wall of the battery pack sealed cavity to form a liquid collection tank; The atomizing device comprises an atomizing nozzle and a rotating disk, wherein the atomizing nozzle is connected to the top of the battery pack sealed cavity, and the rotating disk is connected to the side wall of the battery pack sealed cavity away from the battery rack; A first liquid pipeline and a second gas pipeline are provided at the top of the battery compartment, and a second liquid pipeline is provided at the bottom. The first liquid pipeline, the second gas pipeline and the second liquid pipeline are all connected to the battery pack sealed cavity. The second liquid pipeline is connected to the material tank through a first branch. A second liquid pump is provided on the first branch. The second liquid pipeline is connected to the first phase change material recovery cavity through a second branch. The temperature control mechanism includes an air pump and a heating device, the air pump and the heating device are arranged between the battery compartment and the control room, the material tank is connected to the heating device through a third branch, a first liquid pump is arranged on the third branch, the third branch is connected to the first liquid pipeline through a fourth branch, a second valve is arranged on the third branch between the fourth branch and the heating device, a first valve is arranged on the fourth branch, a first gas pipeline is arranged on one side of the second phase change material recovery chamber, a third valve is arranged on the first gas pipeline, the third valve is used to control the opening and closing of the first gas pipeline, the first gas pipeline is connected to the A heating device is connected, a sixth valve is arranged on the fifth branch, a third gas pipeline is arranged on one side of the top of the first phase change material recovery chamber, the first gas pipeline is connected to the middle section of the third gas pipeline through the sixth branch, one end of the third gas pipeline is connected to the air pump, the end of the air pump away from the third gas pipeline is connected to the second gas pipeline through the seventh branch pipeline, a seventh valve is arranged on the seventh branch, the end of the air pump away from the third gas pipeline is connected to the third gas pipeline through the eighth branch, a fourth valve is arranged on the eighth branch, and a fifth valve is arranged on the third gas pipeline between the eighth branch and the sixth branch.

2. A temperature control system for a container energy storage device based on phase change cooling according to claim 1, characterized in that: The battery pack sealed cavity is provided with an inner sealed door and an outer sealed door, the bottom end of the inner sealed door is connected to the inclined baffle, the top end of the inner sealed door is connected to the top end of the battery pack sealed cavity, the outer sealed door is connected to the outside of the battery pack sealed cavity, the battery pack sealed cavity, the inclined baffle and the inner sealed door form an inner heat exchange space, the battery pack sealed cavity, the inclined baffle, the outer sealed door and the inner sealed door form an outer space, and the outer space is used to place a junction box.

3. A temperature control system for a container energy storage device based on phase change cooling according to claim 1, characterized in that: A hydraulic regulating device is provided between the top of the battery pack sealed cavity and the first liquid pipeline, and the atomizing nozzle is connected to the hydraulic regulating device.

4. A temperature control system for a container energy storage device based on phase change cooling according to claim 1, characterized in that: One side of the air pump is connected to an air pressure regulating device, which is used to adjust and change the internal air pressure of the system and ensure sealing.

5. A temperature control system for a container energy storage device based on phase change cooling according to claim 1, characterized in that: The heating device is a double-layer rectangular box, the inner layer is a sealed cavity and is connected to the third branch and the fifth branch respectively, the outer layer is a heat preservation layer, and a heating plate is installed between the inner layer and the outer layer.

6. A temperature control system for a container energy storage device based on phase change cooling according to claim 1, wherein the system adopts a temperature control method for a container energy storage device based on phase change cooling, characterized in that: The method comprises the following steps: When the battery temperature is too high, it enters the heat dissipation mode. In the heat dissipation mode, the first valve, the third valve and the seventh valve are opened, and the second valve, the fourth valve, the fifth valve and the sixth valve are closed. The phase change material in the material tank enters the sealed cavity of the battery pack under the action of the first liquid pump to cool the battery. The phase change material vaporizes after being heated and flows into the air pump through the second gas pipeline. Under the action of the air pump, the phase change material flows into the second phase change material recovery cavity. The second phase change material recovery cavity is connected with the material tank to form a heat dissipation cycle; When the battery temperature is too low, it enters the insulation mode. In the insulation mode, the second valve, the sixth valve and the seventh valve are opened, and the first valve, the third valve, the fourth valve and the fifth valve are closed. The phase change material in the material tank enters the heating device for heating under the action of the first liquid pump, and the heated and vaporized phase change material enters the air pump. Under the action of the air pump, it enters the sealed cavity of the battery pack through the second gas pipeline to insulate the battery. After the phase change material is cooled, it liquefies and flows back to the material tank under the action of the second liquid pump, forming a insulation cycle.

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