An underground energy storage power station

Abstract

The utility model relates to the field of energy storage technology, in particular to an underground energy storage power station. It includes: a battery compartment; a wall, which surrounds and forms an energy storage space for placing the battery compartment; a water storage compartment, which is arranged outside the wall; a water cooling pipeline, which is connected to the water storage compartment at both ends; the water cooling pipeline at least includes: a heat absorption section located in the energy storage space; a heat release section located in the underground soil layer outside the energy storage space; a water circulation pump connected to the water cooling pipeline for circulating the internal liquid; an air cooling pipeline, which is arranged at the top of the energy storage space, and at least part of the heat absorption section is located in the air cooling pipeline; the air cooling pipeline includes multiple air inlets and multiple air outlets; an air circulation pump, which is connected to the air cooling pipeline, so that the gas in the energy storage space flows in the air cooling pipeline. The water cooling pipeline can be in contact with the soil to maintain a low liquid temperature, and the air circulation pump gathers the hot air emitted by the battery compartment to the water cooling pipeline, so that the heat in the air is transferred to the soil along with the liquid in the water cooling pipeline, so as to achieve a cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an underground energy storage power station. Background Art

[0002] At present, mainstream battery energy storage stations are mainly set up on the ground and dissipate heat through air cooling. However, ground battery energy storage stations occupy a large area, and the limited area leads to a limited number of constructions. In addition, battery combustion after an accident will cause serious losses to the surrounding area. Therefore, setting the battery energy storage station underground can greatly improve the safety of the battery energy storage station, and the vast underground area can build more and larger battery energy storage stations. However, there are still some technical limitations to setting up battery energy storage stations underground. For example, the underground gas flow is poor, and the battery will actively generate heat, which makes it impossible to dissipate the heat around the battery, increasing the risk of battery combustion. Utility Model Content

[0003] In order to solve the above-mentioned prior art problems, the utility model provides an underground energy storage power station, comprising: a battery compartment for storing energy storage batteries;

[0004] A wall surrounds and forms an energy storage space for placing the battery compartment;

[0005] A water storage tank is arranged outside the wall;

[0006] A water cooling pipeline having a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to the water storage tank;

[0007] Wherein, the water cooling pipeline at least includes:

[0008] A heat absorbing section connected to the water outlet is located in the energy storage space and is used to absorb heat in the energy storage space;

[0009] A heat release section connected to the water inlet is located in the underground soil layer outside the energy storage space and is used to release heat into the soil layer;

[0010] Wherein, the heat absorbing section and the heat releasing section are connected;

[0011] A water circulation pump is connected to the water cooling pipeline to provide power for liquid circulation in the water cooling pipeline;

[0012] An air cooling pipeline is arranged at the top of the energy storage space, and at least a part of the heat absorption section is located in the air cooling pipeline;

[0013] The air cooling pipeline includes a plurality of air inlets and a plurality of air outlets, wherein the air inlets are arranged in the interval area between the battery compartments; the air outlets are located at the top of the energy storage space and face the inside of the energy storage space;

[0014] An air circulation pump is connected to the air cooling pipeline to allow the gas in the energy storage space to flow in the air cooling pipeline.

[0015] Furthermore, it also includes a cooling wall, which is arranged between adjacent battery compartments;

[0016] Wherein, the cooling wall is a hollow structure, and a part of the air cooling pipeline with the heat absorption section sleeved thereon is located in the hollow structure of the cooling wall;

[0017] The air inlet passes through the side wall of the cooling wall so that the hollow structure of the cooling wall is connected to the energy storage space.

[0018] Furthermore, the air inlet faces the two side walls of the battery compartment;

[0019] The two side walls of the battery compartment are: walls formed by the long side and the high side of the battery compartment.

[0020] Furthermore, the air inlet has a non-return baffle to make the air inlet a one-way air inlet structure;

[0021] Wherein, the anti-return baffle is hinged to the cooling wall;

[0022] Wherein, the anti-return baffle has a first state, in which the anti-return baffle blocks the air inlet;

[0023] Wherein, the anti-return baffle has a second state, in which the anti-return baffle releases the blockage of the air inlet;

[0024] Wherein, after the air circulation pump is started, suction is formed on the cavity inside the cooling wall, so that the anti-return baffle enters the second state.

[0025] Furthermore, the air cooling pipeline has a dehumidification component located between the cooling wall and the air outlet;

[0026] The dehumidification component is filled in the air cooling pipeline, and the dehumidification component has a gap, so that the air at the air inlet flows through the dehumidification component and then flows out from the air outlet.

[0027] Furthermore, the water cooling pipeline is made of metal and welded with a heat conducting component, and the heat conducting component is located in the cavity of the cooling wall;

[0028] Wherein, the heat-conducting component is composed of a plurality of metal sheets and is used to increase the contact area between the heat-absorbing section and the gas.

[0029] Furthermore, the cross section of the metal sheet is parallel to the cross section of the cooling wall.

[0030] Furthermore, the side wall surface of the metal sheet has a plurality of protrusions or depressions facing the thickness direction thereof.

[0031] Furthermore, the cross section of the metal sheet is perpendicular to the cross section of the cooling wall, and the metal sheet has air flow holes perpendicular to the cross section direction of the cooling wall.

[0032] Furthermore, the air flow hole is trumpet-shaped and has a first opening and a second opening;

[0033] wherein the diameter of the first opening is greater than the diameter of the second opening;

[0034] Furthermore, the first opening is located below the second opening.

[0035] The beneficial effect of the utility model is reflected in that the application adds two cooling systems, air cooling and water cooling, to the underground energy storage power station, wherein the water cooling pipeline can contact the deep underground soil to maintain a low liquid temperature, and the air circulation pump can gather the hot air emitted by the battery compartment to the water cooling pipeline, so that the heat in the air is transferred to the surrounding soil along with the liquid in the water cooling pipeline to achieve the cooling effect. In addition, in view of the problem that condensed water is easily generated when hot air contacts the water cooling pipeline, the application adds a dehumidification component to the water cooling pipeline to ensure that the air outlet always flows out dry gas toward the energy storage space to avoid moisture in the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a three-dimensional internal schematic diagram of an underground energy storage power station provided by the utility model;

[0037] Figure 2 This is an external stereoscopic schematic diagram of an underground energy storage power station provided by the utility model;

[0038] Figure 3 This is a schematic diagram of the interior of the cooling wall provided by the utility model;

[0039] Figure 4 This is an internal schematic diagram of the air cooling pipeline provided by the utility model;

[0040] Figure 5 A schematic diagram of a form of a heat conducting component provided by the utility model;

[0041] Figure 6 A schematic diagram of another form of the heat conducting component provided by the utility model;

[0042] Figure 7 Schematic diagram of the cross section of the air flow hole.

[0043] Reference numerals:

[0044] 1. Battery compartment; 2. Water storage tank; 3. Water cooling pipeline; 31. Heat absorption section; 32. Heat release section; 4. Water circulation pump; 5. Air cooling pipeline; 51. Air inlet; 52. Air outlet; 53. Dehumidification component; 6. Air circulation pump; 7. Cooling wall; 71. Check baffle; 8. Heat conduction component; 81. Metal sheet; 82. Air flow hole; 821. First opening; 822. Second opening; 9. Wall. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] Embodiment 1:

[0047] Reference Figure 1 - Figure 7 shown.

[0048] This embodiment provides an underground energy storage power station, comprising: a battery compartment 1 for storing energy storage batteries;

[0049] A wall 9 is formed around the energy storage space for placing the battery compartment 1;

[0050] A water storage tank 2 is arranged outside the wall 9;

[0051] A water cooling pipeline 3 having a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to the water storage tank 2;

[0052] Wherein, the water cooling pipeline 3 at least includes:

[0053] A heat absorbing section 31 connected to the water outlet is located in the energy storage space and is used to absorb heat in the energy storage space;

[0054] The heat release section 32 connected to the water inlet is located in the underground soil layer outside the energy storage space and is used to release heat into the soil layer;

[0055] Wherein, the heat absorbing section 31 is connected with the heat releasing section 32;

[0056] A water circulation pump 4 is connected to the water cooling pipeline 3 to provide power for the circulation of liquid in the water cooling pipeline 3;

[0057] The air cooling pipeline 5 is arranged at the top of the energy storage space, and at least part of the heat absorption section 31 is located in the air cooling pipeline 5:

[0058] The air cooling pipeline 5 includes a plurality of air inlets 51 and a plurality of air outlets 52, wherein the air inlets 51 are arranged in the interval area between the battery compartments 1 and the battery compartments 1; the air outlets 52 are located at the top of the energy storage space and face the inside of the energy storage space;

[0059] The air circulation pump 6 is connected to the air cooling pipeline 5 so that the gas in the energy storage space flows in the air cooling pipeline 5 .

[0060] The underground has good thermal insulation properties and is very cool because it is not exposed to sunlight. At the same time, placing the battery compartment 1 underground can save a lot of ground space for other construction. However, when the battery compartment 1 is stored underground to form an underground energy storage power station, the thermal insulation of the underground will become a disadvantage. This is because the battery itself will generate heat during the charging and discharging process, and the gas flow in the underground is poor, which makes it impossible for hot air to be discharged in time, which causes the temperature in the energy storage space to continue to rise, increasing the risk of battery combustion.

[0061] In this application, space is excavated underground and concrete walls 9 are set up to form an energy storage space for placing the battery compartment 1. It can be understood that the energy storage space must also have the necessary units to form a battery energy storage power station, such as a battery monitoring system, a fire protection system, a ventilation system, etc.

[0062] A water storage tank 2 is arranged outside the energy storage space. The liquid stored in the water storage tank 2 can be used as fire water to extinguish the fire when the battery compartment 1 accidentally burns. At the same time, the present application also has a water cooling pipeline 3 connected to the water storage tank 2. The water cooling pipeline 3 circulates the liquid along the water cooling pipeline 3 through a water circulation pump 4. The water cooling pipeline 3 is divided into a heat absorption section 31 and a heat release section 32. The water inlet of the heat absorption section 31 is connected to the water storage tank 2. The liquid flows from the water inlet to the heat absorption section 31, and then flows to the heat dissipation section 32, and finally flows back to the water storage tank 2 from the water outlet of the heat dissipation section 32. The heat absorbing section 31 is arranged in the pure energy storage space to absorb the heat emitted by the battery compartment 1. Specifically, the tube wall of the heat absorbing section 31 contacts the hot air, and the liquid in the tube further transfers the heat absorbed by the tube wall along with the flow of the liquid until the liquid flows to the heat releasing section 32. The heat releasing section 32 is located outside the energy storage space. The temperature outside the energy storage space is much lower than the temperature inside. Therefore, the heat absorbed by the liquid from the heat absorbing section 31 will be gradually released in the heat releasing section 32. In addition, the pipeline of the heat releasing section 32 is buried in the soil layer. The specific heat capacity of the soil is much greater than the specific heat capacity of the air, which is sufficient to absorb the heat accumulated in the energy storage space for a long time. In addition, the water storage tank 2 is arranged outside the energy storage space to prevent water vapor from penetrating into the battery compartment 1.

[0063] Furthermore, the present application is also provided with an air-cooling pipeline 5 and an air circulation pump 6. Specifically, the air circulation pump 6 is a fan arranged at the position of the air outlet 52, and the blowing direction is from the air outlet 52 to the energy storage space. The air-cooling pipeline 5 in the present application is another set of pipelines independent of the energy storage space and the ground ventilation system. Specifically, when the air circulation pump 6 is started, the gas enters the air-cooling pipeline 5 from the air inlet 51, and then flows through a distance in the air-cooling pipeline 5 to contact the pipe wall of the heat absorption section 31, transfers the heat to the heat absorption section 31, and then is discharged to the energy storage space from the air outlet 52. Among them, the air cooling pipeline 5 is sleeved on the outside of the heat absorption section 31, which can make the airflow better contact with the heat absorption section 31. After the gas flows to the air inlet 51, it first passes through the heat absorption section 31. The heat absorption section 31 contains liquid, which can absorb heat in the air. The specific heat capacity of water is about four times that of air. Therefore, when the heat in the air is absorbed by water, the temperature will be greatly reduced. That is to say, the temperature of the air entering the air cooling pipeline 5 after passing through the heat absorption section 31 will be reduced to form cold air (relative to the air around the battery compartment 1), and the cold air is blown from the air outlet 52 to the energy storage space for cooling.

[0064] Generally speaking, the air is cooled by the water cooling pipe 3 that brings the hot air into contact with the heat absorbing section 31 through the air cooling pipe 5 and the air circulation pump 6, and the cold air is blown to the energy storage space at the air outlet 52, cooling the area around the battery compartment 1. The liquid that has absorbed heat in the heat absorbing section 31 is transported to the heat releasing section 32 buried in the soil layer through the water circulation pump 4 to release the heat to the soil layer, so that the liquid remains cool. In addition, the underground energy storage power station applied for is mainly cooled by water and soil, and the temperature changes throughout the year have little impact on this application, and there will be no problem of heat dissipation difficulties in summer like the ground battery energy storage station.

[0065] Example 2

[0066] Reference Figure 1 - Figure 4 shown.

[0067] The underground energy storage power station in this embodiment further includes a cooling wall 7, which is arranged between adjacent battery compartments 1;

[0068] The cooling wall 7 is a hollow structure, and the heat absorbing section 31 of the water cooling pipeline 3 is arranged inside;

[0069] Furthermore, the air cooling pipeline 5 partially sleeved with the heat absorption section 31 is located in the hollow structure of the cooling wall 7;

[0070] The air inlet 51 passes through the side wall of the cooling wall 7 so that the hollow structure of the cooling wall 7 is connected to the energy storage space.

[0071] First, the battery compartments 1 are not arranged in a connected manner, but are kept at a certain distance to prevent a single battery compartment 1 from igniting an adjacent battery compartment 1. In this embodiment, a cooling wall 7 is provided at the distance between the battery compartments 1 to further increase the flame retardant effect.

[0072] In this embodiment, the cooling wall 7 is built on the outside with the air cooling pipeline 5 as support, and the channel of the air cooling pipeline 5 is still retained in the cooling wall 7. At the same time, the heat absorption of the water cooling pipeline 3 is arranged inside the cooling wall 7, and the side wall surface of the cooling wall 7 has an air inlet 51. When the air circulation pump 6 is started, the hot air around the battery compartment 1 will first pass through the air inlet 51, and then contact the heat absorption section 31 in the cavity of the cooling wall 7 for cooling. Inhaling hot air into the cavity can make the heat more concentrated and contact the heat absorption section 31, so that the hot air is closer to the heat absorption section 31.

[0073] Furthermore, the air inlet 51 faces a side wall of the battery compartment 1 with the largest surface area.

[0074] The battery compartment 1 is often a rectangular container with four side walls, a top surface, and a bottom surface, wherein the side wall with the largest surface area is the wall formed by the length and height. The cooling wall 7 is set at the spacing of the battery compartment 1, but it is not necessary to surround the battery compartment 1 completely. Doing so will greatly increase the difficulty of building the cooling wall 7, and also require a separate physical door body to affect the maintenance work of the battery compartment 1.

[0075] In the battery compartment 1, the battery cells are distributed on both side walls inside the container, so the combustion risk at both ends of the battery compartment 1 (the walls formed by the wide side and the high side) is much smaller than that on the two side walls, and there are more batteries on the two side walls, and the heat generated will also be more.

[0076] Example 3

[0077] Reference Figure 1 - Figure 4 shown.

[0078] The air cooling pipeline 5 has a dehumidification component 53 located between the cooling wall 7 and the air outlet 52;

[0079] The dehumidification component 53 is filled in the air cooling pipeline 5 , and the dehumidification component 53 has a gap, so that the gas at the air inlet 51 flows through the dehumidification component 53 and then flows out from the air outlet 52 .

[0080] When the hot air comes into contact with the heat absorption section 31 and is cooled, air condensation will occur, causing the gas discharged from the air outlet 52 to be humid, which in turn causes the air in the energy storage space to be humid, affecting the life of the battery in the battery compartment 1 and the service life of the related control circuits.

[0081] In this regard, in the present embodiment, a dehumidification component 53 is provided in the air cooling pipeline 5 . The dehumidification component 53 has a sufficient gap to allow cold air to flow through and then flow out from the air outlet 52 .

[0082] The dehumidification component 53 may be a mesh bag filled with desiccant balls, so that air can pass through the dehumidification component 53, and the dehumidification component 53 is filled in the air cooling pipe 5. A limiter may be further provided in the air cooling pipe 5 to prevent the dehumidification component 53 from sliding. When the cold air passes through the dehumidification component 53, the moisture in the air will be absorbed by the desiccant balls.

[0083] Example 4

[0084] Reference Figure 3 shown.

[0085] The air inlet 51 has a non-return baffle 71, so that the air inlet 51 is a one-way air inlet structure;

[0086] Wherein, the anti-return baffle 71 is hinged to the cooling wall 7;

[0087] The anti-return baffle 71 has a first state, in which the anti-return baffle 71 blocks the air inlet 51;

[0088] The anti-return baffle 71 has a second state, and in the second state, the anti-return baffle 71 releases the blockage of the air inlet 51;

[0089] After the air circulation pump 6 is started, suction is generated on the cavity inside the cooling wall 7 so that the non-return baffle 71 enters the second state.

[0090] In winter, when the power consumption is low, the ventilation system and the surrounding soil layer are sufficient to ensure that the temperature of the energy storage space is within the appropriate range, and the wind circulation pump does not need to be turned on. However, even if the power consumption is low, the battery compartment 1 will also have a slight occurrence, and a small amount of condensation water will appear when these hot air contacts the heat absorption section 31.

[0091] When the air circulation pump 6 is turned off, a large amount of condensed water will remain on the heat dissipation section pipe wall. The condensed water causes the air in the cavity of the cooling wall 7 to become very humid, and the humid air is connected to the working environment of the battery compartment 1 through the air inlet 51, which can easily cause the air in the working environment of the battery compartment 1 to become humid, thereby affecting the life of the battery in the battery compartment 1 and the service life of the related control circuit.

[0092] In this embodiment, a non-return baffle 71 is provided at the air inlet 51 to prevent the humid gas in the cooling wall 7 from flowing back into the energy storage space.

[0093] Specifically, the anti-return baffle 71 is hinged with the cooling wall 7. When the anti-return baffle 71 is not affected by external force, the anti-return baffle 71 is naturally overlapped at the air inlet 51 due to gravity, which is the first state, and the edge of the anti-return baffle 71 can be set to a flexible rubber material, so that it fits more closely with the inner wall surface of the cooling wall 7 and reduces the blocked gap. When the air circulation pump 6 is started, suction is formed on the cavity inside the cooling wall 7, so that the anti-return baffle 71 swings around the hinge axis hinged with the cooling wall 7 toward the cavity of the cooling wall 7, and the air inlet 51 is unblocked, that is, it enters the second state.

[0094] Example 5

[0095] Reference Figure 1 - Figure 6 shown.

[0096] The water cooling pipeline 3 is made of metal and welded with a heat conducting component 8, and the heat conducting component 8 is located inside the cooling wall 7;

[0097] The heat-conducting component 8 is composed of a plurality of metal sheets 81 and is used to increase the contact area between the heat-absorbing section 31 and the gas.

[0098] When the hot air flows into the cavity of the cooling wall 7, it will flow upward along the radial direction of the water cooling pipe 3. At this time, the actual contact area between the air and the water cooling pipe 3 is very small, resulting in poor heat exchange between the air and the water cooling pipe 3, and only a small amount of heat in the air is transferred to the water cooling pipe 3.

[0099] In this application, the water cooling pipeline 3 is made of metal material with good thermal conductivity (metal material has better thermal conductivity than plastic material), and a heat-conducting component 8 is welded around it. The heat-conducting component 8 is located in the cavity of the cooling wall 7. The heat-conducting component 8 is composed of multiple metal sheets 81, which are used to increase the contact area between the heat absorption section 31 and the gas.

[0100] Example 6

[0101] Reference Figure 6 shown.

[0102] Considering that the metal sheet 81 is very prone to condensation, especially the position where the metal sheet 81 is welded to the water cooling pipe 3, if the metal sheet 81 is simply arranged horizontally (the cross section of the metal sheet 81 is perpendicular to the cross section of the cooling wall 7), the condensation water below the single metal sheet 81 will accumulate and be difficult to be transported to the dehumidification component 53, and enter the cavity of the cooling wall 7, causing it to become increasingly humid, and even water accumulation at the bottom. In addition, the horizontally arranged metal sheet 81 largely blocks the area of ​​the air inlet 51, affecting the fluidity of the gas. In the process of air flowing upward, it is difficult for the surface below the metal sheet 81 to form effective contact with the air.

[0103] The metal sheet 81 is arranged longitudinally, that is, the cross section of the metal sheet 81 is parallel to the cross section of the cooling wall 7. At this time, the connection edge of the metal sheet 81 and the water cooling pipe is in a vertical direction, parallel to the direction of air flow, so the condensed water will not be blocked and can enter the dehumidification component 53 with the air.

[0104] Furthermore, the air is too smooth when flowing upward in the longitudinally arranged metal sheet 81, and the air flow direction is the same as the length direction of the metal sheet 81, so that the air is not in good contact with the side wall surface of the metal sheet 81 (the side surface of the metal sheet 81 is: the surface formed by the length and width, which is the wall surface with the largest area of ​​the metal sheet 81). In this regard, in this embodiment, the metal sheet 81 has a plurality of protrusions or depressions facing the thickness direction thereof, and the protrusions and depressions can specifically form the form of a corrugated plate; or the protrusions and depressions make the side wall surface of the metal sheet 81 form an uneven structure. Specifically, the flat metal sheet 81 is stamped and then welded to the water cooling pipe 3.

[0105] Example 7

[0106] Reference Figure 6 and Figure 7 shown.

[0107] Another arrangement of the metal sheet 81 .

[0108] The cross section of the metal sheet 81 is perpendicular to the cross section of the cooling wall 7 , and the metal sheet 81 has air flow holes 82 perpendicular to the cross section of the cooling wall 7 .

[0109] In the above embodiment, it has been found that the transversely arranged metal sheet 81 has the problem of condensed water accumulation. In this regard, in the present embodiment, air flow holes 82 are provided in the metal sheet 81 to increase the fluidity of the gas and allow the condensed water to flow to the dehumidification component 53 through the air flow holes 82.

[0110] Furthermore, the air flow hole 82 is trumpet-shaped and has a first opening 821 and a second opening 822;

[0111] Wherein, the diameter of the first opening 821 is greater than the diameter of the second opening;

[0112] Furthermore, the first opening 821 is located below the second opening.

[0113] The air flow hole 82 is configured to be trumpet-shaped, wherein the opening on the lower surface of the metal sheet is a first opening 821, and the opening on the upper surface is a second opening 822, and the diameter of the first opening 821 is greater than the diameter of the second opening 822. The trumpet-shaped air flow hole 82 can provide a slope for the condensed water on the lower surface of the metal sheet so that the condensed water can flow upward more easily, and then flow to the dehumidification component 53 to reduce the air humidity.

[0114] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0115] In the description of the embodiments of the present utility model, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0116] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0117] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0118] In the description of the embodiments of the present utility model, it is necessary to understand that "-" and "~" represent a range of two identical values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A, and less than or equal to B. "A~B" represents a range greater than or equal to A, and less than or equal to B.

[0119] In the description of the embodiments of the present utility model, the term "and / or" is used herein to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0120] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underground energy storage power station, characterized in that: include: Multiple battery compartments for storing energy storage batteries; A wall surrounds and forms an energy storage space for placing the battery compartment; A water storage tank is arranged outside the wall; A water cooling pipeline having a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to the water storage tank; Wherein, the water cooling pipeline at least includes: A heat absorbing section connected to the water outlet is located in the energy storage space and is used to absorb heat in the energy storage space; A heat release section connected to the water inlet is located in the underground soil layer outside the energy storage space and is used to release heat into the soil layer; Wherein, the heat absorbing section and the heat releasing section are connected; A water circulation pump is connected to the water cooling pipeline to provide power for liquid circulation in the water cooling pipeline; An air cooling pipeline is arranged at the top of the energy storage space and is at least partially sleeved on the heat absorption section; The air cooling pipeline includes a plurality of air inlets and a plurality of air outlets, wherein the air inlets are arranged in the interval area between the battery compartments; the air outlets are located at the top of the energy storage space and face the inside of the energy storage space; An air circulation pump is connected to the air cooling pipeline to allow the gas in the energy storage space to flow in the air cooling pipeline.

2. An underground energy storage power station according to claim 1, characterized in that: It also includes a cooling wall, which is arranged between adjacent battery compartments; Wherein, the cooling wall is a hollow structure, and a part of the air cooling pipeline with the heat absorption section sleeved thereon is located in the hollow structure of the cooling wall; The air inlet passes through the side wall of the cooling wall so that the hollow structure of the cooling wall is connected to the energy storage space.

3. An underground energy storage power station according to claim 2, characterized in that: The air inlet faces the two side walls of the battery compartment; The two side walls of the battery compartment are: walls formed by the long side and the high side of the battery compartment.

4. An underground energy storage power station according to claim 3, characterized in that: The air inlet is provided with a non-return baffle so that the air inlet is a one-way air inlet structure; Wherein, the anti-return baffle is hinged to the cooling wall; Wherein, the anti-return baffle has a first state, in which the anti-return baffle blocks the air inlet; Wherein, the anti-return baffle has a second state, in which the anti-return baffle releases the blockage of the air inlet; Wherein, after the air circulation pump is started, suction is formed on the cavity inside the cooling wall, so that the anti-return baffle enters the second state.

5. An underground energy storage power station according to claim 4, characterized in that: The air cooling pipeline has a dehumidification component located between the cooling wall and the air outlet; The dehumidification component is filled in the air cooling pipeline, and the dehumidification component has a gap, so that the air at the air inlet flows through the dehumidification component and then flows out from the air outlet.

6. An underground energy storage power station according to claim 5, characterized in that: The water cooling pipeline is made of metal and welded with a heat conducting component, and the heat conducting component is located in the cavity of the cooling wall; Wherein, the heat-conducting component is composed of a plurality of metal sheets and is used to increase the contact area between the heat-absorbing section and the gas.

7. An underground energy storage power station according to claim 6, characterized in that: The cross section of the metal sheet is parallel to the cross section of the cooling wall.

8. An underground energy storage power station according to claim 7, characterized in that: The side wall surface of the metal sheet has a plurality of protrusions or depressions facing the thickness direction of the metal sheet.

9. An underground energy storage power station according to claim 6, characterized in that: The cross section of the metal sheet is perpendicular to the cross section of the cooling wall, and the metal sheet has air flow holes perpendicular to the cross section direction of the cooling wall.

10. An underground energy storage power station according to claim 9, characterized in that: The air flow hole is trumpet-shaped and has a first opening and a second opening; wherein the diameter of the first opening is greater than the diameter of the second opening; Furthermore, the first opening is located below the second opening.

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