Energy storage cabinet

Abstract

The utility model discloses an energy storage cabinet, and belongs to the technical field of energy storage equipment, and the energy storage cabinet comprises a cabinet body which is provided with a battery cabin, and the battery cabin comprises a first inner wall; the battery module is arranged in the battery cabin; the water tank is arranged on the first inner wall; the heat exchange module is arranged in the battery cabin and is positioned between the top side of the battery module and the inner top wall of the cabinet body; the first conveying assembly is connected with the water tank and the heat exchange module; the heat exchange module is arranged between the top side of the battery module and the inner top wall of the cabinet body, water in the water tank is conveyed to the heat exchange module through the first conveying assembly, and heat of the top side area of the battery module is absorbed through the heat exchange module, so that the temperature difference between the top side environment temperature of the battery module and the environment temperature of other positions is reduced; the stability of the battery system is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage equipment, and particularly relates to an energy storage cabinet. BACKGROUND

[0002] The use environment of an energy storage system is usually outdoor, and the batteries at some positions are more susceptible to solar radiation, so that the ambient temperature near the batteries is higher than that of the batteries at other positions, which affects the temperature difference between the batteries and increases the instability of the battery system. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the application provides an energy storage cabinet, aiming to solve the technical problem that the temperature difference between the batteries in the current energy storage system is affected by solar radiation, and the instability of the battery system is increased.

[0004] Technical scheme: the energy storage cabinet provided by the embodiment of the application comprises:

[0005] a cabinet body having a battery cabin, wherein the battery cabin comprises a first inner wall;

[0006] a battery module arranged in the battery cabin;

[0007] a water tank arranged on the first inner wall;

[0008] a heat exchange module arranged in the battery cabin and located between the top side of the battery module and the inner top wall of the cabinet body;

[0009] a first conveying assembly connected with the water tank and the heat exchange module.

[0010] In some embodiments, in a first direction, the water tank is arranged on the side of the battery module away from the heat exchange module, and the first direction is the height direction of the cabinet body.

[0011] In some embodiments, in the first direction, the orthographic projection of the heat exchange module on the battery module is not less than the top surface of the battery module.

[0012] In some embodiments, the cabinet body further comprises a cooling cabin, and the energy storage cabinet further comprises a condenser and a spraying assembly, wherein the condenser and the spraying assembly are arranged in the cooling cabin, the spraying assembly comprises a spraying head, the spraying head is connected with the water tank, and the spraying head is used for spraying the condenser.

[0013] In some embodiments, the spraying assembly further comprises a water collecting tray and a water return pipe, the water collecting tray is arranged below the condenser and is arranged opposite to the spraying head, and the water return pipe is connected with the water collecting tray and the water tank.

[0014] In some embodiments, the spray head is connected to the first conveying assembly, so that the heat exchange module is connected to the spray head through the first conveying assembly.

[0015] In some embodiments, the energy storage cabinet further comprises a second conveying assembly, and the spray head is connected to the water tank through the second conveying assembly.

[0016] In some embodiments, the energy storage cabinet further comprises a fan, and the fan is arranged in the cooling cabin and distributed above the condenser.

[0017] In some embodiments, the energy storage cabinet further comprises a dehumidifier, and the dehumidifier is arranged in the cabinet body, and a water outlet of the dehumidifier is connected to the water tank.

[0018] In some embodiments, the water tank is provided with a water collecting groove extending along the outer periphery of the water tank away from one side of the first inner wall, and the water outlet of the dehumidifier is communicated with the water collecting groove, and the water collecting groove is communicated with the water tank.

[0019] Beneficial effects: Since the top of the battery module is more susceptible to solar radiation, the ambient temperature of the battery module at the top position is higher than that at other positions. The energy storage cabinet of the embodiment of the present application sets the heat exchange module between the top side of the battery module and the inner top wall of the cabinet body, uses the first conveying assembly to convey water in the water tank to the heat exchange module, and absorbs heat in the space on the top side of the battery module through the heat exchange module, so as to reduce the temperature difference between the ambient temperature of the top side of the battery module and the ambient temperature of other positions, and improve the stability of the battery system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 A perspective structural schematic diagram of the energy storage cabinet provided by the embodiment of the present application is provided.

[0022] Figure 2 A front view of the energy storage cabinet provided by the embodiment of the present application is provided.

[0023] Figure 3 A structural schematic diagram of the spray assembly provided by the embodiment of the present application is provided.

[0024] Figure 4 A structural schematic diagram of the second conveying assembly provided by the embodiment of the present application is provided.

[0025] Figure 5This is a schematic diagram of the connection between the dehumidifier and the water tank provided in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the water collection tank provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the spray head provided in the embodiments of this application;

[0028] Figure 8 A schematic diagram of another spray head provided in an embodiment of this application;

[0029] Figure 9 A schematic diagram of another spray head provided in an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the structure of the heat exchange module provided in an embodiment of this application;

[0031] Figure 11 A schematic diagram of another heat exchange module provided in an embodiment of this application;

[0032] Figure 12 A schematic diagram of another heat exchange module provided in an embodiment of this application;

[0033] Reference numerals: 1. Cabinet; 10. Battery compartment; 11. First inner wall; 2. Battery module; 3. Water tank; 31. Water collection trough; 4. Heat exchange module; 5. First conveying assembly; 51. First pipe; 52. First water pump; 6. Cooling chamber; 7. Condenser; 8. Spray assembly; 81. Spray head; 82. Water collection tray; 83. Return water pipe; 9. Second conveying assembly; 91. Second pipe; 92. Second water pump; 100. Fan; 200. Dehumidifier; 300. Partition. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0036] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrow marked with X indicates the height direction X of the energy storage cabinet. The height direction X is introduced to more clearly illustrate the structure and relative positional relationship of each component in the energy storage cabinet. In practical applications, the height direction X may change depending on the placement of the energy storage cabinet.

[0037] As a preamble to the embodiments of this application, the energy storage system is typically used outdoors. When operating in hot regions, the ambient temperature of the energy storage system will reach 45°C or higher, making the stable cooling output capability of the temperature control equipment crucial. Existing energy storage systems usually select temperature control equipment based on the highest operating temperature, which inevitably leads to an increase in the required cooling capacity. However, the cooling capacity cannot guarantee a uniform temperature distribution within the storage compartment. Generally, the top battery, lacking the shielding of other components or structures, is more susceptible to the effects of solar radiation and heat flow, resulting in a higher ambient temperature near it compared to the bottom battery. This indirectly affects the temperature difference between the batteries, potentially leading to uneven charging and discharging, power loss, and other issues that impact the stability of the battery system.

[0038] Please combine them together Figure 1 , Figure 2 and Figure 3 The energy storage cabinet in this embodiment includes a cabinet 1, a battery module 2, a water tank 3, a heat exchange module 4, and a first conveying assembly 5. The cabinet 1 has a battery compartment 10, which includes a first inner wall 11.

[0039] Battery module 2 is installed inside battery compartment 10 for storing electrical energy. Battery module 2 includes multiple battery modules arranged in multiple columns and along a first direction X, which is the height direction of cabinet 1.

[0040] Water tank 3 is located on the first inner wall 11. Water tank 3 stores a cooling medium, such as low-temperature pure water. The first inner wall 11 can be the inner top wall, inner side wall, or inner bottom wall of the cabinet 1. That is, water tank 3 can be located anywhere on the cabinet 1, as long as it does not interfere with other structures or components. The inner top wall, inner side wall, or inner bottom wall of the cabinet 1 can be understood as follows: when the cabinet 1 is placed normally or horizontally, the wall corresponding to an observation angle inside the cabinet 1 that is vertically upward or looking up is the inner top wall; the wall corresponding to a downward or vertically downward view is the inner bottom wall; and the wall corresponding to a left, right, front, or back view is the inner side wall. Alternatively, when the cabinet 1 is placed outdoors, the outer top wall of the cabinet 1 is in direct contact with the external environment, for example, sunlight can directly illuminate the outer top wall. The inner top wall is the wall on which the cabinet 1 is located and distributed opposite to the outer top wall.

[0041] The water tank 3 can be directly fixed to the first inner wall 11 or indirectly fixed. For example, a pad is provided between the water tank 3 and the first inner wall 11 so that there is a certain distance between the water tank 3 and the first inner wall 11. Alternatively, the water tank 3 can be supported on the first inner wall 11 so as to contact the first inner wall 11. Or the water tank 3 can be connected to other structures through components and contact or approach the first inner wall 11.

[0042] The heat exchange module 4 is disposed in the battery compartment 10 and located between the top side 21 of the battery module 2 and the inner top wall 12 of the cabinet 1. Specifically, the heat exchange module 4 can be disposed on the top side 21 of the battery module 2, or on the inner top wall 12 of the cabinet 1, or have a certain distance from both the top side 21 of the battery module 2 and the inner top wall 12 of the cabinet 1. This is mainly to realize the spatial correspondence between the battery module 2, the heat exchange module 4 and the inner top wall 12 of the cabinet 1.

[0043] The top side 21 of the battery module 2 can be understood as follows: the battery module 2 is a whole, which has a top and a bottom in the first direction and a side wall in the direction perpendicular to the first direction, and the top side 21 of the battery module 2 is its top position.

[0044] The first conveying component 5 is located in the battery compartment 10 and is connected to the water tank 3 and the heat exchange module 4, and is used to pump water from the water tank 3 to the heat exchange module 4.

[0045] The heat exchange module 4 is positioned between the battery module 2 and the inner top wall 12 of the cabinet 1, which can reduce the direct impact of solar thermal radiation on the top side area of ​​the battery module 2. At the same time, the heat exchange module 4 absorbs the heat in the top side area of ​​the battery module 2 and transfers the heat to the low-temperature water inside, so as to prevent the ambient temperature of the top side of the battery module 2 from being too high. This keeps the ambient temperature of the battery module 2 in the cabinet 1 within a relatively stable range, thereby improving the stability of the battery system.

[0046] In this embodiment, the first conveying component 5 includes a first pipe 51 and a first water pump 52. The water tank 3, the heat exchange module 4 and the first water pump 52 are connected in series on the first pipe 51. The water in the water tank 3 is pumped to the heat exchange module 4 by the first water pump 52.

[0047] Please combine them together Figure 1 and Figure 2 In some embodiments, in the first direction X, the water tank 3 is positioned on the side of the battery module 2 away from the heat exchange module 4. In this case, the first inner wall 11 corresponds to the inner bottom wall of the cabinet 1. The water tank 3, battery module 2, and heat exchange module 4 are arranged in a positional relationship along the first direction X, making full use of the space of the cabinet 1 in the first direction X. At the same time, the water tank 3 corresponds to the bottom area of ​​the battery module 2, and can utilize the high specific heat capacity of water to maintain a relatively stable temperature when absorbing or releasing heat, thereby reducing the temperature gradient change of the battery module 2 in the first direction X. In order to amplify the improvement effect of the water tank 3 on the bottom area of ​​the battery module 2, in this embodiment, the orthographic projection of the battery module 2 along the first direction X onto the water tank 3 is located within the area enclosed by the outer periphery of the water tank 3.

[0048] Please refer to Figure 2 In some embodiments, in the first direction X, the orthographic projection of the heat exchange module 4 onto the battery module 2 is not less than the top surface of the battery module 2. The orthographic projection of the heat exchange module 4 onto the battery module 2 can be approximately understood as a rectangular area, the length and width of which are both greater than the length and width of the top surface of the battery module 2, so as to expand the influence range of the heat exchange module 4 on the surrounding environment and make the ambient temperature distribution on the top side of the battery module 2 uniform.

[0049] Please combine them together Figure 2 and Figure 3 In some embodiments, the cabinet 1 also has a cooling chamber 6, which is isolated from the battery compartment 10. The energy storage cabinet also includes a condenser 7 and a spray assembly 8. The condenser 7 and the spray assembly 8 are both located in the cooling chamber 6. The spray assembly 8 includes a spray head 81, which is connected to the water tank 3 and is arranged opposite to the condenser 7 for spraying the condenser 7.

[0050] In this embodiment, the refrigeration system of the energy storage cabinet includes a coolant circuit and a refrigerant circuit. The coolant circuit directly exchanges heat with the battery module 2, while the refrigerant circuit provides cooling to the coolant circuit through changes in the physical properties of the refrigerant, keeping the coolant at a low temperature. When cooling the battery module 2, in the coolant circuit, the high-temperature coolant that has absorbed the heat from the battery module 2 passes through the evaporator, becomes a low-temperature coolant, enters the cold plate, carries away the battery heat, and then re-enters the evaporator for further cooling. In the refrigerant circuit, the low-temperature liquid refrigerant passes through the evaporator, evaporates, absorbs heat from the coolant, and simultaneously becomes gaseous. It is then compressed by the compressor, condensed by the condenser 7, and expanded by the expansion valve, becoming a low-temperature liquid refrigerant again and entering the evaporator to absorb heat, thus forming a cycle.

[0051] When the energy storage cabinet is in a high-temperature environment, the temperature difference between the inside and outside of the condenser 7 is small, resulting in a decrease in its heat exchange efficiency. This prevents the high-temperature gaseous refrigerant from being fully liquefied, leading to a reduction in cooling effect. Water is sprayed onto the surface of the condenser 7 or the area surrounding it through spray nozzles 81. The evaporation of water absorbs heat, lowering the temperature of the condenser 7 itself and its surrounding environment. This allows the condenser to fully absorb heat from the refrigerant, causing it to liquefy.

[0052] Please combine them together Figure 7 , Figure 8 and Figure 9 In some embodiments, the spray head 81 may adopt a direct water jet structure, spraying water directly onto the surface of the condenser 7 in the form of a water jet stream; or, the spray head 81 may adopt an atomizing nozzle, spraying water mist onto the surface of the condenser 7 or the air surrounding the condenser 7; or, the spray head 81 may adopt a water curtain structure, that is, the spray head 81 includes multiple water outlets arranged in a row, and the water flow output from each water outlet forms a water curtain to cool the condenser 7.

[0053] Please refer to Figure 3 In some embodiments, the spray assembly 8 further includes a water receiving tray 82 and a return water pipe 83. The water receiving tray 82 is disposed below the condenser 7 and opposite to the spray head 81. The return water pipe 83 connects the water receiving tray 82 and the water tank 3. Water sprayed onto the surface of the condenser 7 falls into the water receiving tray 82 under gravity and then flows back to the water tank 3 via the return water pipe 83 for reuse, which saves water resources and achieves reasonable recycling of cooling water.

[0054] Please refer to Figure 3In some embodiments, the spray head 81 is connected to the first conveying assembly 5 so that the heat exchange module 4 is connected to the spray head 81 through the first conveying assembly 5. Specifically, the spray head 81 is connected in series on the first pipe 51 and is located at the rear end of the heat exchange module 4. When the first water pump 52 operates, the water in the water tank 3 first absorbs heat from the top area of ​​the battery module 2 through the heat exchange module 4, and then is sprayed out through the spray head 81. Connecting the spray heads 81 in series simplifies the pipeline design, reduces the required pipeline length and the space occupied by the pipeline.

[0055] Please refer to Figure 4 In some embodiments, the energy storage cabinet further includes a second conveying assembly 9, through which the spray head 81 is connected to the water tank 3. The second conveying assembly 9 includes a second pipe 91 and a second water pump 92. The water tank 3, the second water pump 92, and the spray head 81 are connected in series via the second pipe 91. The second water pump 92 pumps water from the water tank 3 to the spray head 81 for spraying. In this embodiment, the second pipe 91 passes through the water receiving tray 82 and then connects to the spray head 81. The second conveying assembly 9 supplies water to the spray head 81 separately, which helps to ensure the water pressure of the spray head 81 and to achieve different water flow patterns according to different structures of the spray head 81.

[0056] At this time, the first pipe 51 in the first conveying component 5 connects the heat exchange module 4 and the water tank 3 in series to form a loop, so that the water output from the heat exchange module 4 flows directly back into the water tank 3 for recycling.

[0057] Please combine them together Figure 3 and Figure 4 In some embodiments, the energy storage cabinet also includes a fan 100, which is disposed in the cooling chamber 6 and located above the condenser 7. The fan 100 is used to draw airflow toward the condenser 7, thereby accelerating the heat exchange rate of the condenser 7. At the same time, the airflow drawn by the fan 100 can also accelerate the evaporation rate of moisture on the surface of the condenser 7, thereby enhancing the cooling effect of the spray.

[0058] Please refer to Figure 5 In some embodiments, the energy storage cabinet also includes a dehumidifier 200, which is installed in the cabinet 1 and has its drain outlet connected to a water tank 3. In this embodiment, the dehumidifier 200 is installed inside the battery compartment 10 and can be directly connected to the water tank 3 or connected to the water tank 3 via a pipe. The dehumidifier 200 is used to absorb moisture from the air inside the cabinet 1, reduce air humidity, and maintain a dry environment inside the cabinet 1. The moisture absorbed by the dehumidifier 200 is condensed and then returned to the water tank 3 through a pipe, which helps to improve the utilization rate of water resources.

[0059] Please refer to Figure 6In some embodiments, a water collection trough 31 extending along the outer periphery is provided on the side of the water tank 3 away from the first inner wall 11. The drain outlet of the dehumidifier 200 is connected to the water collection trough 31, and the water collection trough 31 is connected to the water tank 3. Specifically, the dehumidifier 200 is connected to the water collection trough 31 through a pipe. The water collection trough 31 can be connected to the interior of the water tank 3 through a pipe. Alternatively, an overflow hole can be provided on the inner wall of the water collection trough 31, through which the interior of the water collection trough 31 is connected to the interior of the water tank 3. In this case, the drain outlet of the dehumidifier 200 is connected to the water tank 3 through the water collection trough 31.

[0060] After dehumidification, the condensate stored by the dehumidifier 200 is guided into the water collection tank 31 under the action of gravity, and then enters the water tank 3 for storage. In addition, the water collection tank 31 can also be used to receive the leakage generated by the battery module 2 or the condensation generated inside the cabinet 1 due to excessive humidity, so as to prevent the leakage or condensation from accumulating at the bottom of the battery compartment 10 and causing safety hazards.

[0061] Please refer to Figure 1 In some embodiments, the energy storage cabinet also includes a partition 300, which divides the interior of the cabinet 1 into a battery compartment 10 and a cooling compartment 6. The two compartments are sealed to prevent water sprayed in the cooling compartment 6 from directly entering the battery compartment 10, thus protecting the electrical safety of the battery module 2.

[0062] Please combine them together Figure 10 , Figure 11 and Figure 12 In some embodiments, the heat exchange module 4 includes one of a plate heat exchanger, a toothed heat exchanger, a tube-fin heat exchanger, a pipe network heat exchanger, or a microchannel heat exchanger, which can be flexibly selected according to the space between the battery module 2 and the inner top wall 12 of the cabinet 1.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0064] The energy storage cabinet provided in the embodiments of this application has been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage cabinet, characterized in that, include: The cabinet (1) has a battery compartment (10) including a first inner wall (11); Battery module (2) is disposed in the battery compartment (10); Water tank (3) is disposed on the first inner wall (11); A heat exchange module (4) is disposed in the battery compartment (10) and located between the top side (21) of the battery module (2) and the inner top wall (12) of the cabinet (1); The first conveying component (5) connects the water tank (3) and the heat exchange module (4).

2. The energy storage cabinet according to claim 1, characterized in that, In a first direction, the water tank (3) is located on the side of the battery module (2) away from the heat exchange module (4), and the first direction is the height direction of the cabinet (1).

3. The energy storage cabinet according to claim 1, characterized in that, In the first direction, the orthographic projection of the heat exchange module (4) onto the battery module (2) is not less than the top surface of the battery module (2).

4. The energy storage cabinet according to claim 1, characterized in that, The cabinet (1) also has a cooling chamber (6), and the energy storage cabinet also includes a condenser (7) and a spray assembly (8). The condenser (7) and the spray assembly (8) are disposed in the cooling chamber (6). The spray assembly (8) includes a spray head (81), which is connected to the water tank (3) and is used to spray the condenser (7).

5. The energy storage cabinet according to claim 4, characterized in that, The spray assembly (8) also includes a water receiving tray (82) and a return water pipe (83). The water receiving tray (82) is located below the condenser (7) and is opposite to the spray head (81). The return water pipe (83) connects the water receiving tray (82) and the water tank (3).

6. The energy storage cabinet according to claim 4 or 5, characterized in that, The spray head (81) is connected to the first conveying assembly (5) so that the heat exchange module (4) is connected to the spray head (81) through the first conveying assembly (5).

7. The energy storage cabinet according to claim 4 or 5, characterized in that, The energy storage cabinet also includes a second conveying assembly (9), and the spray head (81) is connected to the water tank (3) through the second conveying assembly (9).

8. The energy storage cabinet according to claim 5, characterized in that, The energy storage cabinet also includes a fan (100), which is located in the cooling chamber (6) and distributed above the condenser (7).

9. The energy storage cabinet according to claim 2, characterized in that, The energy storage cabinet also includes a dehumidifier (200), which is installed in the cabinet (1), and the drain outlet of the dehumidifier (200) is connected to the water tank (3).

10. The energy storage cabinet according to claim 9, characterized in that, The water tank (3) has a water collection trough (31) extending along its outer periphery on the side away from the first inner wall (11). The drain outlet of the dehumidifier (200) is connected to the water collection trough (31), and the water collection trough (31) is connected to the water tank (3).

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