Energy storage apparatus, energy storage system, and charging network

Abstract

An energy storage apparatus (1), an energy storage system, and a charging network. The energy storage apparatus (1) comprises a housing (30) and a liquid cooling unit (20). The housing (30) comprises a battery compartment (10). The battery compartment (10) is configured to accommodate a plurality of battery apparatuses (100), each of the plurality of battery apparatuses (100) comprising a plurality of battery cells and a thermal management component, and the thermal management component being configured to manage temperatures of the plurality of battery cells. In a gravity direction, the liquid cooling unit (20) is located at a top portion of the battery compartment. The liquid cooling unit (20) comprises a pressure pump (221), an evaporator (211), a compressor (212), and a condenser (213). The pressure pump (221), the evaporator (211), and the thermal management components of the plurality of battery apparatuses (100) are configured to form a coolant loop (22). The evaporator (211), the compressor (212), and the condenser (213) are configured to form a refrigerant loop (21). The pressure pump (221), the evaporator (211), and the compressor (212) are all located at an end of the condenser (213) along a length direction of the energy storage apparatus (1). The heat dissipation capability of the energy storage apparatus (1) can be improved.

Description

Energy storage devices, energy storage systems and charging networks Cross-references to related applications

[0001] This application claims priority to Chinese patent application CN202520142186.8, filed on January 21, 2025, entitled “Energy Storage Device, Energy Storage System and Charging Network”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of batteries, and more specifically, to an energy storage device, an energy storage system, and a charging network. Background Technology

[0003] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. The performance of energy storage devices has a significant impact on their development. Therefore, how to improve the performance of energy storage devices is an urgent problem to be solved. Summary of the Invention

[0004] This application provides an energy storage device, an energy storage system, and a charging network, which can improve the heat dissipation capacity of the energy storage device.

[0005] In a first aspect, an energy storage device is provided, comprising: a housing including a battery compartment for accommodating multiple battery devices, each of the multiple battery devices including multiple battery cells and a thermal management component for managing the temperature of the multiple battery cells; and a liquid cooling unit located at the top of the battery compartment along the direction of gravity, the liquid cooling unit including: a pressure pump, an evaporator, a compressor, and a condenser; wherein the pressure pump, the evaporator, and the thermal management component of the multiple battery devices are used to form a coolant circuit, and the evaporator, the compressor, and the condenser are used to form a refrigerant circuit.

[0006] Therefore, in the energy storage device of this application embodiment, the liquid cooling unit can be used to regulate the temperature of the battery device in the battery compartment. The liquid cooling unit is located at the top of the battery compartment. On the one hand, the top space of the battery compartment is large, which can make more reasonable use of the space. On the other hand, it can facilitate the heat dissipation of the liquid cooling unit. Compared with the case where the liquid cooling unit is placed between or at the end of the battery compartment, the impact of the liquid cooling unit on the surrounding components when dissipating heat can be reduced. It can also reduce the impact of external environmental heat radiation on the internal temperature of the top of the battery compartment, thereby improving the heat dissipation efficiency of the energy storage device.

[0007] Furthermore, the pressure pump, evaporator, and compressor are all located at one end of the condenser along the length of the energy storage device. Considering that the condenser is typically large, it can be positioned at one end of the top of the energy storage device along its length, while the pressure pump, evaporator, and compressor of the liquid cooling unit are located at the other end. This maximizes space utilization, increases the integration of the liquid cooling unit, and facilitates temperature regulation for the battery compartment below.

[0008] In some embodiments, the liquid cooling unit further includes a fan assembly for dissipating heat from the condenser, wherein the pressure pump, the evaporator, and the compressor are all located at one end of the condenser and the fan assembly along the length of the energy storage device. Positioning the fan assembly and the condenser on the same side improves the heat dissipation efficiency of the fan assembly.

[0009] In some embodiments, the fan assembly includes an air inlet and an air outlet; wherein the air inlet is located on the end face of the liquid cooler unit parallel to the direction of gravity, and / or the air outlet is located on the end face of the liquid cooler unit perpendicular to the direction of gravity and facing outwards from the energy storage device. The air outlet is located on the top end face to discharge high-temperature gas upwards, reducing the impact of the high-temperature gas on other energy storage devices or other components around the energy storage device. The air inlet is located on the side of the liquid cooler unit perpendicular to the top end face to facilitate the absorption of gas from the external environment.

[0010] In some embodiments, the air inlet and the air outlet are located on two opposite end faces of the liquid cooling unit, so that the gas drawn in from the air inlet passes through the condenser located between the air inlet and the air outlet, and after making more full contact with the condenser, the gas carrying heat is discharged from the air outlet, thereby improving heat dissipation efficiency.

[0011] In some embodiments, the housing includes a first housing wall for isolating the liquid cooling unit and the battery compartment. The first housing wall can be used to improve the sealing of the battery compartment to achieve a thermal insulation effect.

[0012] In some embodiments, the liquid cooling unit can be detachably connected to the outside of the housing so that it can be transported separately, reducing the transport weight; or, the housing may further include a liquid cooling chamber for housing the liquid cooling unit, and the first housing wall for separating the liquid cooling chamber and the battery compartment, so that the liquid cooling unit and the battery compartment can be transported as a whole, simplifying the assembly process.

[0013] In some embodiments, the liquid cooling unit further includes a housing for housing the pressure pump, the evaporator, the compressor, and the condenser, the housing being detachably connected to the first compartment wall for easy installation.

[0014] In some embodiments, the dimensions of the storage unit meet the dimensions of a standard 20-foot shipping container to facilitate transportation.

[0015] In some embodiments, the energy storage device further includes an electrical compartment for housing at least one of the following components: a power distribution module, a main control module, a busbar, an auxiliary power junction box, and a fire control assembly. The components within the electrical compartment can be used to control, manage, and monitor the battery device.

[0016] In some embodiments, the energy storage device includes a plurality of battery compartments, with the electrical compartment located in the middle of the plurality of battery compartments; or, the electrical compartment is located at one end of the battery compartment for ease of processing and assembly.

[0017] In some embodiments, along the direction of gravity, the electrical compartment is located on top of the battery compartment in order to maximize the battery compartment below and increase the energy density of the energy storage device.

[0018] In some embodiments, the electrical compartment is located at one end of the liquid chiller unit along the length of the energy storage device, so as to centrally house the components inside the electrical compartment and the components inside the liquid chiller unit, facilitating assembly.

[0019] In some embodiments, the weight of the energy storage device ranges from [15t, 45t]. Setting the weight of the energy storage device to be greater than or equal to 15t can increase the capacity of the energy storage device and improve transportation efficiency. Setting the weight of the energy storage device to be less than or equal to 45t ensures that the energy storage device can be transported on roads in most countries without exceeding transportation limits.

[0020] In a second aspect, an energy storage system is provided, comprising: a power conversion device and an energy storage device as described in the first aspect or any embodiment of the first aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0021] Thirdly, a charging network is provided, comprising: a charging pile and an energy storage device as described in the first aspect or any embodiment of the first aspect, or an energy storage system as described in the second aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of an energy storage device according to an embodiment of this application;

[0023] Figure 2 is a structural block diagram of a liquid-cooled unit according to an embodiment of this application;

[0024] Figure 3 is another structural block diagram of a liquid-cooled unit according to an embodiment of this application;

[0025] Figure 4 is another structural block diagram of a liquid-cooled unit according to an embodiment of this application;

[0026] Figure 5 is another structural schematic diagram of an energy storage device according to an embodiment of this application;

[0027] Figure 6 is a top view of an energy storage device according to an embodiment of this application;

[0028] Figure 7 is a front view schematic diagram of an energy storage device according to an embodiment of this application;

[0029] Figure 8 is another front view schematic diagram of an energy storage device according to an embodiment of this application;

[0030] Figure 9 is a side view schematic diagram of an energy storage device according to an embodiment of this application;

[0031] Figure 10 is another front view schematic diagram of an energy storage device according to an embodiment of this application;

[0032] Figure 11 is another front view schematic diagram of an energy storage device according to an embodiment of this application;

[0033] Figure 12 is another front view schematic diagram of an energy storage device according to an embodiment of this application;

[0034] Figure 13 is a schematic diagram of the arrangement of multiple energy storage devices according to an embodiment of this application;

[0035] Figure 14 is a structural block diagram of an energy storage system according to an embodiment of this application;

[0036] Figure 15 is a structural block diagram of a charging network according to an embodiment of this application.

[0037] The accompanying drawings are not drawn to scale. Detailed Implementation

[0038] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0041] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0045] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0046] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0047] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0048] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0050] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0051] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0052] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0053] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0054] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0055] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0056] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0057] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0058] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0059] Energy storage devices typically include a battery compartment, an electrical compartment, and a liquid cooling unit. The electrical compartment houses electrical components and controls and manages the battery devices within the battery compartment. The liquid cooling unit regulates the temperature of the battery devices within the battery compartment. Existing power plants are demanding increasingly higher areal energy density from energy storage devices, which in turn increases the need for temperature regulation by the liquid cooling unit. Considering different application scenarios such as transportation and use, how to incorporate liquid cooling units to improve the reliability of energy storage devices has become a pressing issue.

[0060] Therefore, this application provides an energy storage device that can solve the above-mentioned problems. The energy storage device of this application includes a housing and a liquid cooling unit. The housing includes a battery compartment for accommodating multiple battery devices. Each battery device includes multiple individual battery cells and a thermal management component for managing the temperature of the individual battery cells. Along the direction of gravity, the liquid cooling unit is located at the top of the battery compartment. The liquid cooling unit includes a pressure pump, an evaporator, a compressor, and a condenser. The pressure pump, evaporator, and the thermal management component of the multiple battery devices form a coolant circuit, while the evaporator, compressor, and condenser form a refrigerant circuit. The liquid cooling unit can be used to regulate the temperature of the battery devices within the battery compartment. Furthermore, the location of the liquid cooling unit at the top of the battery compartment provides ample space for more efficient use of space and facilitates heat dissipation by the liquid cooling unit. Compared to placing the liquid cooling unit between or at the ends of the battery compartments, this reduces the impact of the liquid cooling unit's heat dissipation on surrounding components and also reduces the impact of external environmental heat radiation on the internal temperature of the battery compartment, thereby improving the heat dissipation efficiency of the energy storage device.

[0061] Figure 1 shows a schematic diagram of the structure of the energy storage device 1 according to an embodiment of the present application. As shown in Figure 1, the energy storage device 1 according to an embodiment of the present application includes: a housing 30 and a liquid cooling unit 20. The housing 30 includes a battery compartment 10, which is used to accommodate multiple battery devices 100. The liquid cooling unit 20 is located on top of the battery compartment 10 along the direction of gravity.

[0062] In some embodiments of this application, the energy storage device 1 may be an energy storage container or an energy storage cabinet.

[0063] In some embodiments, the energy storage device 1 is typically an approximately cuboid structure. For example, this application embodiment takes the cuboid energy storage device 1 shown in FIG1 as an example; and, for ease of description, three mutually perpendicular directions as shown in FIG1 are defined respectively: the length direction X, the width direction Y, and the height direction Z of the energy storage device 1, wherein the dimension of the length direction X of the energy storage device 1 is greater than the dimension of the width direction Y.

[0064] It should be understood that the battery compartment 10 in this application embodiment can be used to accommodate battery devices 100. The multiple battery devices 100 can be electrically connected in series, parallel or a combination of series and parallel to obtain different capacities and voltages.

[0065] In some embodiments, the battery compartment 10 of the energy storage device 1 of this application can be used to accommodate one or more battery clusters to increase the voltage and capacity of the energy storage device 1. A battery cluster may include multiple battery devices 100; for example, multiple battery devices 100 are connected in series via a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are typically connected in parallel to increase the capacity of the energy storage device 1.

[0066] In some embodiments, the battery compartment 10 of the energy storage device 1 of this application embodiment can also be used to house a main control module. This main control module can serve as a battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0067] In some embodiments, the energy storage device 1 may be provided with one or more battery compartments 10. For example, the energy storage device 1 may include one battery compartment 10 for accommodating all battery devices 100. As another example, the energy storage device 1 may include multiple battery compartments 10, each battery compartment 10 for accommodating multiple battery devices 100. For instance, each battery compartment 10 may be used to accommodate a battery cluster, so that multiple battery compartments 10 can accommodate multiple battery clusters for ease of installation.

[0068] The battery compartment 10 of this embodiment accommodates multiple battery devices 100, wherein each battery device 100 may include multiple battery cells and a thermal management component. The thermal management component is used to regulate the temperature of the multiple battery cells, for example, it can regulate the temperature of the battery cells within the battery device 100. Specifically, a liquid cooling unit 20 can be connected to the thermal management component via piping to regulate the temperature of the battery cells within the battery device 100 via the thermal management component.

[0069] It should be understood that the specific structure and components of the liquid cooling unit 20 in the embodiments of this application can be configured according to actual applications. For example, FIG2 shows a structural block diagram of the liquid cooling unit 20 for regulating the temperature of the battery device 100 in the battery compartment 10 according to an embodiment of this application.

[0070] As shown in Figure 2, the liquid cooling unit 20 of this application embodiment includes: a pressure pump 221, an evaporator 211, a compressor 212, and a condenser 213. The pressure pump 221, the evaporator 211, and the thermal management components of the multiple battery devices 100 are used to form a coolant circuit 22, and the evaporator 211, the compressor 212, and the condenser 213 are used to form a refrigerant circuit 21.

[0071] In some embodiments, as shown in FIG2, the connection relationship of the pressure pump 221, evaporator 211, compressor 212 and condenser 213 includes: the coolant inlet 2113 and coolant outlet 2114 of the evaporator 211 are connected to the plurality of battery devices 100 for regulating the temperature of the plurality of battery devices 100; the pressure pump 221 is connected between the plurality of battery devices 100 and the coolant inlet 2113 of the evaporator 211; the refrigerant outlet 2112 of the evaporator 211 is connected to the inlet 2121 of the compressor 212; the outlet 2122 of the compressor 212 is connected to the inlet 2131 of the condenser 213; and the outlet 2132 of the condenser 213 is connected to the refrigerant inlet 2111 of the evaporator 211.

[0072] It should be understood that the temperature between the liquid-cooled unit 20 and the battery device 100 in the battery compartment 10 of this application embodiment can be regulated through the refrigerant circuit 21 and the coolant circuit 22. For example, Figure 2 shows the approximate path of the coolant circuit 22 by multiple arrows on the left and the approximate path of the refrigerant circuit 21 by multiple arrows on the right. Specifically, the refrigerant circuit 21 can be used to provide cooling, while the coolant circuit 22 can be used to provide heating. The refrigerant circuit 21 may include an evaporator 211, a compressor 212, and a condenser 213 for transferring refrigerant. The coolant circuit 22 includes a pressure pump 221, an evaporator 211, and the battery compartment 10 for transferring coolant.

[0073] For example, if the temperature of the battery device 100 inside the battery compartment 10 is low, the liquid cooling unit 20 needs to heat up the battery device 100. At this time, the coolant can be heated through the coolant circuit 22, and the heat can be transferred to the coolant in the coolant pipe. The coolant carrying heat flows to the vicinity of the battery device 100 through the coolant pipe. For example, the coolant can be transferred to the thermal management component inside the battery device 100 through the coolant pipe, so that the coolant can exchange heat with the battery cells inside the battery device 100 through the thermal management component, thereby raising the temperature.

[0074] Conversely, if the temperature of the battery unit 100 inside the battery compartment 10 is high, the liquid cooling unit 20 needs to cool the battery unit 100. At this time, the refrigerant circuit 21 starts to work. The refrigerant in the refrigerant circuit 21 is compressed by the compressor 212. The high-temperature, high-pressure gas discharged from the output end 2122 of the compressor 212 enters the condenser 213 and is liquefied by the condenser 213 to obtain a low-temperature liquid refrigerant. In this way, the refrigerant carrying the cooling capacity at the evaporator 211 exchanges heat with the coolant in the coolant circuit 22, and the cooling capacity is transferred to the coolant flowing in the coolant circuit 22. The coolant carrying the cooling capacity flows to the vicinity of the battery unit 100 through the coolant pipes. For example, the coolant can be transferred to the thermal management component inside the battery unit 100 through the coolant pipes, so that the coolant can exchange heat with the individual battery cells inside the battery unit 100 through the thermal management component, thereby cooling down.

[0075] It should be understood that the liquid cooling unit 20 in this embodiment can be used to regulate the temperature of the battery device 100 inside the battery compartment 10. Furthermore, the liquid cooling unit 20 is positioned at the top of the battery compartment 10 along the direction of gravity; that is, the pressure pump 221, evaporator 211, compressor 212, and condenser 213 included in the liquid cooling unit 20 are all located at the top of the battery compartment 10. For example, as shown in FIG1, in this embodiment, taking the height direction Z of the energy storage device 1 as parallel to and opposite to the direction of gravity, the liquid cooling unit 20 is located at one end of the battery compartment 10 along the height direction Z.

[0076] In this way, on the one hand, the top space of the battery compartment 10 is larger, allowing for more efficient use of space; on the other hand, it facilitates heat dissipation by the liquid cooling unit 20. For example, compared to placing the liquid cooling unit 20 between multiple battery compartments 10 or at the ends of the battery compartments 10, the impact of the liquid cooling unit 20 on surrounding components during heat dissipation can be reduced, and the impact of external environmental heat radiation on the internal temperature of the top of the battery compartment 10 can also be reduced, thereby improving the heat dissipation efficiency of the energy storage device 1.

[0077] It should be understood that the liquid cooling unit 20 disposed on top of the battery compartment 10 in this embodiment includes a pressure pump 221, an evaporator 211, a compressor 212, and a condenser 213. Furthermore, it may also include other components, all of which may be disposed on top of the battery compartment 10. For example, FIG3 shows another structural block diagram of the liquid cooling unit 20 used to regulate the temperature of the battery device 100 in the battery compartment 10 according to an embodiment of this application.

[0078] In some embodiments, as shown in FIG3, the liquid cooling unit 20 further includes an expansion tank 222, a liquid storage tank 214, and an expansion valve 215. The expansion tank 222 is connected between the plurality of battery devices 100 and the pressure pump 221. The liquid storage tank 214 is connected between the output end 2132 of the condenser 213 and the refrigerant input end 2111 of the evaporator 211. The expansion valve 215 is connected between the liquid storage tank 214 and the refrigerant input end 2111 of the evaporator 211. By further configuring the expansion tank 222, the liquid storage tank 214, and the expansion valve 215, the liquid cooling unit 20 can be optimized, and its temperature regulation capability can be improved.

[0079] The expansion tank 222 of this embodiment is located in the coolant circuit 22 and can be used to store and replenish coolant. For example, if the temperature and pressure of the coolant in the coolant circuit 22 increase, causing the coolant to expand, the excess coolant will flow into the expansion tank 222 for storage; conversely, if the coolant pressure or temperature in the coolant circuit 22 decreases, the expansion tank 222 will replenish coolant through corresponding pipes, thereby ensuring the normal operation of the coolant circuit 22 and a stable supply of coolant.

[0080] The liquid storage tank 214 of this application embodiment is located in the refrigerant circuit 21 and can be used to store the condensed liquid refrigerant output from the output terminal 2132 of the condenser 213. When the refrigerant in the refrigerant circuit 21 is insufficient, automatic liquid replenishment can be achieved.

[0081] The expansion valve 215 in this embodiment is located in the refrigerant circuit 21 and can be used to realize the liquid refrigerant output from the condenser 213 by suddenly increasing its volume, thereby instantly vaporizing the liquid refrigerant. During the phase change process, it will take away the surrounding heat and briefly form a gas-liquid mixture.

[0082] Furthermore, Figure 4 shows another structural block diagram of a liquid cooling unit 20 for regulating the temperature of the battery device 100 within the battery compartment 10, according to an embodiment of this application.

[0083] In some embodiments, as shown in FIG4, the liquid cooling unit 20 further includes at least one of the following components: a first ball valve 223, a second ball valve 224, a float switch 225, a low-pressure controller 216, a high-pressure controller 217, and a fan assembly 218. The first ball valve 223 is located between the plurality of battery devices 100 and the expansion tank 222; the second ball valve 224 is located between the coolant output terminal 2114 of the evaporator 211 and the plurality of battery devices 100; the float switch 225 is disposed in the expansion tank 222; the low-pressure controller 216 is connected between the refrigerant output terminal 2112 of the evaporator 211 and the input terminal 2121 of the compressor 212; the high-pressure controller 217 is connected between the liquid storage tank 214 and the output terminal 2132 of the condenser 213; and the fan assembly 218 is used to dissipate heat from the condenser 213. All of the above-mentioned components included in the liquid cooling unit 20 can be located on top of the battery compartment 10. Furthermore, by further configuring the aforementioned components, the liquid cooling unit 20 can be further optimized, and its temperature regulation capability can be improved.

[0084] In this embodiment of the application, the first ball valve 223 is located between the multiple battery devices 100 and the expansion tank 222 in the coolant circuit 22, and the second ball valve 224 is located between the coolant output end 2114 of the evaporator 211 and the multiple battery devices 100 in the coolant circuit 22. The two ball valves can be used to control whether the coolant flows in the coolant circuit 22.

[0085] The float switch 225 of this application embodiment is installed in the expansion tank 222 to promptly issue an alarm signal when the coolant in the expansion tank 222 reaches the limit position, thereby improving the reliability of the coolant circuit 22.

[0086] The low-pressure controller 216 of this embodiment is disposed at the input terminal 2121 of the compressor 212 in the refrigerant circuit 21. For example, it can be disposed between the refrigerant output terminal 2112 of the evaporator 211 and the input terminal 2121 of the compressor 212, so as to stop the operation of the compressor 212 when the pressure of the refrigerant input to the input terminal 2121 of the compressor 212 is lower than a preset value. This is because when operating at too low a pressure, the compressor 212 may be in an inefficient or unstable operating condition, which will not only reduce the cooling effect, but may also damage the compressor 212.

[0087] In this embodiment, the high-pressure controller 217 is positioned between the liquid storage tank 214 and the output terminal 2132 of the condenser 213. When the refrigerant in the condenser 213 is compressed and releases heat, its pressure and temperature both increase. If the refrigerant pressure exceeds a set value, the high-pressure controller 217 will respond quickly, for example, by cutting off the power supply or adjusting the operating status of each component in the refrigerant circuit 21 to prevent the pressure from continuing to rise and causing damage to the components in the refrigerant circuit 21.

[0088] The fan assembly 218 in this embodiment can be used to cool the condenser 213. For example, the fan assembly 218 may include one or more fans. The airflow from the fans can remove the heat from the high-temperature, high-pressure gas, thereby quickly enabling the condenser 213 to condense the gas into liquid refrigerant.

[0089] In some embodiments, the liquid cooling unit 20 may also include other components, which will not be described in detail here. For example, the coolant circuit 22 may also include a positive temperature coefficient thermistor (PTC) for heating the coolant when the coolant temperature is low, thereby providing heat to the battery device 100. Exemplarily, the PTC may be located between the expansion tank 222 and the pressure pump 221, and / or between the pressure pump 221 and the evaporator 211; however, the embodiments of this application are not limited thereto.

[0090] It should be understood that all the components of the liquid cooling unit 20 in this embodiment can be located on top of the battery compartment 10, and the specific placement of each component in the liquid cooling unit 20 can be flexibly set according to actual application. For example, Figure 5 shows another structural schematic diagram of the energy storage device 1 in this embodiment. Compared with Figure 1, Figure 5 can be another implementation of the energy storage device 1 in this embodiment. Figure 5 is mainly used to illustrate the internal structure of the energy storage device 1, and some compartment walls are not shown. Figure 6 shows a top view of the energy storage device 1 in this embodiment. For example, Figure 6 can be a top view of the energy storage device 1 shown in Figure 5.

[0091] In some embodiments, as shown in Figures 5 and 6, the pressure pump 221, evaporator 211, and compressor 212 in the liquid cooling unit 20 are all located at one end of the condenser 213 along the length X of the energy storage device 1. Considering that the condenser 213 is typically large, it can be positioned at the top of the energy storage device 1 at one end along the length X, while the remaining components of the liquid cooling unit 20—pressure pump 221, evaporator 211, and compressor 212—are located at the other end along the length X. This maximizes space utilization, increases the integration of the liquid cooling unit 20, and facilitates temperature regulation for the battery compartment 10 below.

[0092] In some embodiments, when the liquid cooling unit 20 includes a fan assembly 218, the pressure pump 221, evaporator 211, and compressor 212 are all located at one end of the condenser 213 and the fan assembly 218 along the length X of the energy storage device 1. In this embodiment, the fan assembly 218 is used to dissipate heat from the condenser 213; therefore, by placing the fan assembly 218 and the condenser 213 on the same side, the heat dissipation efficiency of the fan assembly 218 can be improved.

[0093] In some embodiments, all components of the liquid cooling unit 20, except for the condenser 213 and the fan assembly 218, can be located at one end of the condenser 213 and the fan assembly 218 along the length X of the energy storage device 1. As shown in Figures 5 and 6, in the liquid cooling unit 20, the condenser 213 and the fan assembly 218 are located at one end along the length X of the energy storage device 1, while all other components are located at the other end, in order to maximize space utilization, increase the integration of the liquid cooling unit 20, and facilitate temperature regulation for the battery compartment 10 below.

[0094] In some embodiments, the evaporator 211 in the liquid-cooled unit 20 is typically located close to the condenser 213. For example, as shown in Figures 5 and 6, the condenser 213 and the fan assembly 218 may be located at one end along the length X of the energy storage device 1, while other components are located at the other end. In this case, the evaporator 211 will be closer to the condenser 213 and the fan assembly 218 than other components, in order to facilitate heat dissipation of the evaporator 211. For example, the evaporator 211 can be cooled by the fan assembly 218, that is, the fan assembly 218 can cool both the evaporator 211 and the condenser 213, thereby improving temperature regulation efficiency and reducing power consumption.

[0095] In this embodiment, the fan assembly 218 includes an air inlet 2181 and an air outlet 2182 to achieve heat exchange and discharge high-temperature gas to the external environment. The positions of the air inlet 2181 and the air outlet 2182 in this embodiment can be set according to actual applications.

[0096] In some embodiments, the air outlet 2182 is located on the end face of the liquid-cooled unit 20 perpendicular to the direction of gravity and faces outward of the energy storage device, as shown in Figures 5 and 6. The air outlet 2182 is located on the top end face to exhaust the high-temperature gas upward, reducing the impact of the high-temperature gas on other energy storage devices or other components around the energy storage device 1. Furthermore, for the cuboid energy storage device 1, the top end face has a large area, and placing the air outlet 2182 on the top end face can increase the exhaust area, thereby improving the heat dissipation efficiency.

[0097] In some embodiments, the air inlet 2181 is located on the end face of the liquid cooler unit 20 parallel to the direction of gravity, as shown in Figures 5 and 6. The air inlet 2181 can be located on the side face of the liquid cooler unit 20 perpendicular to the top end face to facilitate the absorption of gas from the external environment.

[0098] In some embodiments, the air inlet 2181 and the air outlet 2182 are located on different end faces of the liquid cooling unit 20, so that the gas drawn in from the air inlet 2181 can fully contact the condenser 213 and then discharge the heated gas from the air outlet 2182 to improve heat dissipation efficiency.

[0099] In some embodiments, the air inlet 2181 and the air outlet 2182 are respectively located on two opposite end faces of the liquid-cooled unit 20, so that the gas drawn in from the air inlet 2181 passes through the condenser 213 located between the air inlet 2181 and the air outlet 2182, and after making more sufficient contact with the condenser 213, the gas carrying heat is discharged from the air outlet 2182, thereby improving heat dissipation efficiency. For example, the air inlet 2181 and the air outlet 2182 can be located at the top and bottom ends of the liquid-cooled unit 20 perpendicular to the direction of gravity, respectively. The air inlet 2181 can be located at the bottom end of the liquid-cooled unit 20 facing the battery compartment 10, with a certain gap between the bottom end and the battery compartment 10 to allow gas to enter the air inlet 2181, while the air outlet 2182 can be located at the top end of the liquid-cooled unit 20 away from the battery compartment 10. Alternatively, the air inlet 2181 and the air outlet 2182 may be located on two opposite sides of the liquid cooling unit 20, parallel to the direction of gravity. For example, the air inlet 2181 and the air outlet 2182 may be located on the two sides of the liquid cooling unit 20 with larger areas to improve heat dissipation efficiency.

[0100] In some embodiments, the air inlet 2181 and air outlet 2182 may also be located on two intersecting end faces of the liquid cooling unit 20. For example, the air outlet 2182 is located on the end face of the liquid cooling unit 20 perpendicular to the direction of gravity and faces the outside of the energy storage device; while the air inlet 2181 is located on the end face of the liquid cooling unit 20 parallel to the direction of gravity and intersects with the end face where the air outlet 2182 is located. The air outlet 2182 is located on the top end face, with a larger exhaust area, which facilitates heat dissipation and exhausts the high-temperature gas upwards, reducing the impact of the high-temperature gas on other energy storage devices or other components around the energy storage device 1. The air inlet 2181 is located on the side, which, compared to being located at the bottom of the liquid cooling unit 20 facing the battery compartment 10, makes it easier to absorb external gas and improve heat dissipation efficiency.

[0101] In this embodiment, the housing 30 of the energy storage device 1 has a hollow structure, and its interior can be used to accommodate the various components of the energy storage device 1. For example, the housing 30 can be used to form a battery compartment 10 to accommodate multiple battery devices 100 for easy transportation.

[0102] In some embodiments, the housing 30 includes a first housing wall 31, which isolates the liquid cooling unit 20 and the battery compartment 10. As shown in Figures 5 and 6, the first housing wall 31, located between the liquid cooling unit 20 and the battery compartment 10, can improve the sealing of the battery compartment 10 to achieve a heat insulation effect. Furthermore, the first housing wall 31 can be equipped with a sealed through-wall water pipe to connect the water pipes inside the battery compartment 10 to the liquid cooling unit 20.

[0103] It should be understood that the liquid cooling unit 20 and the housing 30 in this embodiment of the application can be fixed in a variety of ways.

[0104] In some embodiments, the housing 30 is also used to house the liquid cooling unit 20. Specifically, the housing 30 further includes a liquid cooling chamber 33, which is used to house the liquid cooling unit 20, and a first housing wall 31 is used to isolate the liquid cooling chamber 33 from the battery compartment 10.

[0105] Figure 7 shows a front view of the energy storage device 1 according to an embodiment of this application. For example, Figure 7 can be a front view of the energy storage device 1 shown in Figure 5. As shown in Figure 7, the housing 30 may include a battery compartment 10, and the housing 30 may also include a liquid cooling compartment 33 located on top of the battery compartment 10 for accommodating the liquid cooling unit 20. That is, the liquid cooling unit 20 is located inside the housing 30 so that the energy storage device 1 can be transported as a whole during transportation. Furthermore, the liquid cooling compartment 33 and the battery compartment 10 can be separated by the first housing wall 31 to facilitate assembly.

[0106] In some embodiments, the liquid cooling unit 20 is detachably connected to the outside of the housing 30. Figure 8 shows another front view of the energy storage device 1 according to an embodiment of this application. As shown in Figure 8, unlike the housing 30 shown in Figure 7, the housing 30 in Figure 8 does not house the liquid cooling unit 20; that is, the liquid cooling unit 20 is installed outside the housing 30. For example, the liquid cooling unit 20 can be fixed to the first housing wall 31. When transporting the energy storage device 1, the liquid cooling unit 20 can be removed from the housing 30, and the housing 30 containing the battery device 100 of the energy storage device 1 can be transported separately from the liquid cooling unit 20 to reduce the transport weight. After transportation, the liquid cooling unit 20 and the housing 30 are reassembled.

[0107] In this embodiment of the application, the liquid cooling unit 20 also includes a housing 23, in which the components of the liquid cooling unit 20 are housed. For example, the housing 23 can be used to house the pressure pump 221, the evaporator 211, the compressor 212 and the condenser 213, and can also be used to house other components of the refrigerant circuit 21 and the coolant circuit 22.

[0108] In some embodiments, as shown in FIG7, when the liquid cooling chamber 33 of the chamber 30 accommodates the liquid cooling unit 20, the liquid cooling unit 20 may include a housing 23 to accommodate the housing 23 within the liquid cooling chamber 33 for easy assembly; or, the liquid cooling unit 20 may not include the housing 23, and the liquid cooling chamber 33 may replace the housing 23 to accommodate the various components of the liquid cooling unit 20. The embodiments of this application are not limited thereto.

[0109] In some embodiments, as shown in FIG8, when the liquid cooling unit 20 is disposed outside the housing 30, the outer casing 23 is detachably connected to the first housing wall 31 to facilitate the disassembly and installation of the liquid cooling unit 20. For example, when transporting the energy storage device 1, the outer casing 23 can be detached from the first housing wall 31 to remove the liquid cooling unit 20 from the housing 30, and the housing 30 containing the battery device 100 of the energy storage device 1 can be transported separately from the liquid cooling unit 20 to reduce the transport weight. After transportation, the outer casing 23 is then installed back onto the first housing wall 31, thereby assembling and fixing the liquid cooling unit 20 to the housing 30.

[0110] It should be understood that the weight of the energy storage device 1 in this application embodiment can be set according to actual application. For example, the weight of the energy storage device 1 can range from [15t, 45t]. Setting the weight of the energy storage device 1 to be greater than or equal to 15 tons (t) can increase the capacity of the energy storage device 1 and improve transportation efficiency. Setting the weight of the energy storage device 1 to be less than or equal to 45t ensures that the energy storage device 1 can be transported on roads in most countries without exceeding transportation limits.

[0111] In this embodiment, the weight of the energy storage device 1 may or may not include the liquid cooling unit 20. For example, as shown in FIG7, if the liquid cooling unit 20 is housed within the housing 30, the liquid cooling unit 20 is transported together with other components, and the weight of the energy storage device 1 may include the liquid cooling unit 20. As another example, as shown in FIG8, if the liquid cooling unit 20 is located outside the housing 30 and is detachable from the housing 30, the liquid cooling unit 20 is transported separately from other components, and the weight of the energy storage device 1 may not include the liquid cooling unit 20.

[0112] It should be understood that the size of the energy storage device 1 in this application embodiment can be set according to actual application. For example, the energy storage device 1 can be set to the size of a standard container, such as a 20-foot standard container. Alternatively, the energy storage device 1 can be set to a non-standard container size; for example, the length and width of the energy storage device 1 can meet the requirements of a 20-foot standard container, but the height of the energy storage device 1 does not meet the requirements of a 20-foot standard container, which facilitates movement and transportation while increasing the capacity of the energy storage device 1.

[0113] In this embodiment, the size of the energy storage device 1 may refer only to the size of the container 30, meaning it may or may not include the liquid cooling unit 20. For example, the size of the container 30 may meet the dimensions of a standard 20-foot shipping container for ease of transport. For instance, as shown in Figure 7, if the liquid cooling unit 20 is housed within the container 30, it is transported together with other components, and the size of the energy storage device 1 is set as the external dimensions of the container 30, meaning it may include the liquid cooling unit 20. As another example, as shown in Figure 8, if the liquid cooling unit 20 is located outside the container 30 and is detachable from it, it is transported separately from other components, and the size of the energy storage device 1 may not include the liquid cooling unit 20; that is, the size of the energy storage device 1 is the size of the container 30 below the liquid cooling unit 20.

[0114] It should be understood that the energy storage device 1 in the embodiments of this application may also include other components.

[0115] In some embodiments, the energy storage device 1 further includes an electrical compartment 40, which can be used to house electrical components. For example, the electrical compartment 40 is used to house at least one of the following components: a power distribution module 41, a main control module 42, a busbar 43, an auxiliary power junction box 44, and a fire control component 45. Figure 9 shows a side view of the energy storage device 1 according to an embodiment of this application. For example, Figure 9 can be a side view of the energy storage device 1 shown in Figure 5. Figure 9 shows one possible implementation of the electrical compartment 40 according to an embodiment of this application, but the embodiments of this application are not limited thereto.

[0116] The power distribution module 41 of this application embodiment can be used for the normal power supply of various devices in the energy storage device 1, as well as to realize the distribution and scheduling of electrical energy, so as to meet the power demand of the energy storage device 1 under different operating conditions.

[0117] The central control module 42 in this embodiment can be used to monitor and manage the status of the battery device 100 within the battery compartment 10, enabling the battery device 100 to operate safely and stably. The central control module 42 can serve as the battery management unit of the energy storage device 1, used to monitor and manage the energy storage device 1. The central control module 42 can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device 1. For example, it can control the charging and discharging current and voltage of the energy storage device 1. As an example, the central control module 42 includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0118] The bus 43 in this embodiment can be used to collect the current of multiple battery clusters to form one or more large current outputs for subsequent inversion, grid connection or direct power supply.

[0119] The auxiliary power junction box 44 in this embodiment can be used to supply power to components such as the fire control component 45 and the liquid cooling unit 20 within the energy storage device 1. For example, the auxiliary power junction box 44 can be used to output AC power to supply power to components such as the fire control component 45 and the liquid cooling unit 20.

[0120] The fire control component 45 in this embodiment may include a control panel, detectors, alarm devices, etc., for detecting, alarming or extinguishing the energy storage device 1.

[0121] It should be understood that the compartment 30 in this embodiment may further include a second compartment wall 32, which is used to isolate the battery compartment 10 from the electrical compartment 40. The second compartment wall 32 can improve the sealing performance of the battery compartment 10, thereby achieving a sealing and heat insulation effect. Furthermore, the second compartment wall 32 may be provided with wiring holes to facilitate the connection between the wiring harness of the battery compartment 10 and the components within the electrical compartment 40.

[0122] It should be understood that the position of the electrical compartment 40 in this application embodiment can be set according to actual application. In some embodiments, the electrical compartment 40 and the battery compartment 10 are arranged along the length direction X of the energy storage device 1. Considering that the length direction X of the energy storage device 1 is relatively large, arranging the electrical compartment 40 and the battery compartment 10 along the length direction X of the energy storage device 1 can improve space utilization.

[0123] It should be understood that the energy storage device 1 in the embodiments of this application may include one or more battery compartments 10. When the electrical compartment 40 and the one or more battery compartments 10 are arranged along the length direction X, the relative position of the electrical compartment 40 and the one or more battery compartments 10 can be set according to the actual application.

[0124] In some embodiments, as shown in Figures 5 to 9, the electrical compartment 40 is located at one end of the battery compartment 10, so that one or more battery compartments 10 are centrally located, facilitating processing and assembly. Specifically, along the length direction X of the energy storage device 1, the electrical compartment 40 can be located at any end of the battery compartment 10. For example, Figures 5 to 9 show the electrical compartment 40 located at the right end of the battery compartment 10, but unlike that shown in Figures 5 to 9, the electrical compartment 40 can also be located at the left end of the battery compartment 10.

[0125] In some embodiments, the energy storage device 1 includes a plurality of battery compartments 10, with an electrical compartment 40 located in the middle of the plurality of battery compartments 10. Figure 10 shows another front view of the energy storage device 1 according to an embodiment of this application. As shown in Figure 10, the electrical compartment 40 can be positioned in the middle of the plurality of battery compartments 10, and the number of battery compartments 10 on both sides of the electrical compartment 40 is usually the same to facilitate connection.

[0126] In some embodiments, the electrical compartment 40 is located on top of the battery compartment 10 along the direction of gravity. Figure 11 shows another front view of the energy storage device 1 according to an embodiment of this application. As shown in Figure 11, the electrical compartment 40 can be placed on top of the battery compartment 10, that is, both the electrical compartment 40 and the liquid cooling unit 20 are located on top of the battery compartment 10, so as to make full use of the top space and to maximize the space of the battery compartment 10 below, thereby improving the energy density of the energy storage device 1.

[0127] In some embodiments, as shown in FIG11, the electrical compartment 40 is located at one end of the liquid cooling unit 20 along the length direction X of the energy storage device 1, so as to centrally house the components inside the electrical compartment 40 and the components inside the liquid cooling unit 20, which facilitates assembly.

[0128] In some embodiments, the energy storage device 1 may further include multiple electrical compartments 40, that is, multiple electrical components are respectively arranged in different positions of the energy storage device 1 to improve space utilization. Figure 12 shows another front view schematic diagram of the energy storage device 1 according to an embodiment of the present application. As shown in Figure 12, the energy storage device 1 may include two electrical compartments 40, one of which is located on top of the battery compartment 10, and the other electrical compartment 40 is arranged with the battery compartment 10 along the length direction X of the energy storage device 1, but the embodiments of the present application are not limited thereto.

[0129] In some embodiments, different electrical compartments 40 at different locations of the energy storage device 1 can be used to accommodate different electrical components. For example, as shown in FIG12, two electrical compartments 40 can be used to accommodate different electrical components. For example, the electrical compartment 40 located at the top of the battery compartment 10 can be used to accommodate the power distribution module 41 and the main control module 42; the electrical compartment 40 arranged along the length X direction of the energy storage device 1 with the battery compartment 10 can be used to accommodate the busbar 43, the auxiliary power junction box 44, and the fire control component 45, so as to facilitate the connection between the components.

[0130] Figure 13 shows a schematic diagram of the arrangement of multiple energy storage devices 1 according to an embodiment of this application. As shown in Figure 13, when arranging multiple energy storage devices 1, they can be arranged back-to-back or in a grid pattern to reduce space occupancy. Especially in countries where land is scarce and the energy gain per unit area is relatively high, this arrangement can meet customers' requirements for the area energy density of the energy storage devices 1 and the area energy density gain achieved by the arrangement of the energy storage devices 1.

[0131] Furthermore, as shown in Figure 13, since the liquid cooling unit 20 in this embodiment is located at the top, maintenance of the liquid cooling unit 20 can be performed at the top without considering the exhaust distance between the multiple energy storage devices 1 and the maintenance space of the liquid cooling unit 20. Only space needs to be reserved between the two energy storage devices 1 for touch-up painting, disassembling the mounting plate, etc. For example, the spacing L1 and L2 between the multiple energy storage devices 1 can be set to approximately 0.6m to improve space utilization.

[0132] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 described in any of the above schemes. Figure 14 shows a structural block diagram of the energy storage system according to an embodiment of this application. In some embodiments, as shown in Figure 14, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between a power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0133] According to some embodiments of this application, a charging network is provided. Figure 15 shows a structural block diagram of the charging network according to an embodiment of this application. As shown in Figure 15, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electrical energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device in the energy storage device 1 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electrical device (such as a vehicle) to replenish the energy of the electrical device.

[0134] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0135] According to some embodiments of this application, referring to Figures 1 to 6, this application provides an energy storage device 1, including: a housing 30, the housing 30 including a battery compartment 10, the battery compartment 10 for accommodating a plurality of battery devices 100, each of the plurality of battery devices 100 including a plurality of battery cells and a thermal management component, the thermal management component for managing the temperature of the plurality of battery cells; a liquid cooling unit 20, located on top of the battery compartment 10 along the direction of gravity, the liquid cooling unit 20 including: a pressure pump 221, an evaporator 211, a compressor 212 and a condenser 213; wherein, the pressure pump 221, the evaporator 211 and the thermal management component of the plurality of battery devices 100 are used to form a coolant circuit 22, the evaporator 211, the compressor 212 and the condenser 213 are used to form a refrigerant circuit 21, and the pressure pump 221, the evaporator 211 and the compressor 212 are all located at one end of the condenser 213 along the length direction of the energy storage device.

[0136] The liquid-cooled unit 20 also includes a fan assembly 218 for dissipating heat from the condenser 213. A pressure pump 221, an evaporator 211, and a compressor 212 are all located at one end of the condenser 213 and the fan assembly 218 along the length of the energy storage device. The fan assembly 218 includes an air inlet 2181 and an air outlet 2182; wherein the air inlet 2181 is located on the end face of the liquid-cooled unit 20 parallel to the direction of gravity, and / or the air outlet 2182 is located on the end face of the liquid-cooled unit 20 perpendicular to the direction of gravity and faces outwards from the energy storage device. The air inlet 2181 and the air outlet 2182 are located on two opposite end faces of the liquid-cooled unit 20.

[0137] The housing 30 includes a first housing wall 31, which isolates the liquid cooling unit 20 and the battery compartment 10. The liquid cooling unit 20 is detachably connected to the outside of the housing 30; alternatively, the housing 30 also includes a liquid cooling chamber 33, which houses the liquid cooling unit 20, and the first housing wall 31 isolates the liquid cooling chamber 33 and the battery compartment 10. The liquid cooling unit 20 also includes a housing 23, which houses the pressure pump 221, evaporator 211, compressor 212, and condenser 213, and the housing 23 is detachably connected to the first housing wall 31.

[0138] Energy storage device 1 also includes an electrical compartment 40, which is used to house at least one of the following components: a power distribution module 41, a main control module 42, a busbar 43, an auxiliary power junction box 44, and a fire control component 45.

[0139] The weight of the energy storage device ranges from [15t, 45t]. The dimensions of the 30mm hopper body meet the dimensions of a standard 20-foot shipping container.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. 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, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: The compartment (30) includes a battery compartment (10) for accommodating a plurality of battery devices (100), each of the plurality of battery devices (100) including a plurality of battery cells and a thermal management component for managing the temperature of the plurality of battery cells; The liquid cooling unit (20) is located on top of the battery compartment (10) along the direction of gravity. The liquid cooling unit (20) includes: a pressure pump (221), an evaporator (211), a compressor (212), and a condenser (213). The pressure pump (221), the evaporator (211), and the thermal management components of the plurality of battery devices (100) are used to form a coolant circuit (22), the evaporator (211), the compressor (212), and the condenser (213) are used to form a refrigerant circuit (21), and the pressure pump (221), the evaporator (211), and the compressor (212) are all located at one end of the condenser (213) along the length of the energy storage device.

2. The energy storage device according to claim 1, characterized in that, The liquid cooling unit (20) also includes: A fan assembly (218) is provided for dissipating heat from the condenser (213). The pressure pump (221), the evaporator (211), and the compressor (212) are all located at one end of the condenser (213) and the fan assembly (218) along the length of the energy storage device.

3. The energy storage device according to claim 2, characterized in that, The fan assembly (218) includes an air inlet (2181) and an air outlet (2182); Wherein, the air inlet (2181) is located on the end face of the liquid cooling unit (20) parallel to the direction of gravity, and / or, The air outlet (2182) is located on the end face of the liquid cooling unit (20) perpendicular to the direction of gravity and faces the outside of the energy storage device.

4. The energy storage device according to claim 3, characterized in that, The air inlet (2181) and the air outlet (2182) are located on two opposite end faces of the liquid cooling unit (20).

5. The energy storage device according to any one of claims 1 to 4, characterized in that, The compartment (30) includes a first compartment wall (31) for isolating the liquid cooling unit (20) and the battery compartment (10).

6. The energy storage device according to claim 5, characterized in that, The liquid cooling unit (20) is detachably connected to the outside of the housing (30); or, The compartment (30) also includes a liquid cooling compartment (33) for accommodating the liquid cooling unit (20), and the first compartment wall (31) for separating the liquid cooling compartment (33) from the battery compartment (10).

7. The energy storage device according to claim 6, characterized in that, The liquid cooling unit (20) also includes a housing (23) for accommodating the pressure pump (221), the evaporator (211), the compressor (212), and the condenser (213). The outer shell (23) is detachably connected to the first compartment wall (31).

8. The energy storage device according to any one of claims 1 to 7, characterized in that, The dimensions of the storage unit (30) meet the dimensions of a standard 20-foot container.

9. The energy storage device according to any one of claims 1 to 8, characterized in that, The energy storage device also includes: An electrical compartment (40) is provided to house at least one of the following components: a power distribution module (41), a main control module (42), a busbar (43), an auxiliary power junction box (44), and a fire control assembly (45); The energy storage device includes a plurality of battery compartments (10), and the electrical compartment (40) is located in the middle of the plurality of battery compartments (10); or, The electrical compartment (40) is located at one end of the battery compartment (10).

10. The energy storage device according to claim 9, characterized in that, Along the direction of gravity, the electrical compartment (40) is located on top of the battery compartment (10), and the electrical compartment (40) is located at one end of the liquid cooling unit (20) along the length of the energy storage device.

11. The energy storage device according to any one of claims 1 to 10, characterized in that, The weight of the energy storage device ranges from [15t to 45t].

12. An energy storage system, characterized in that, include: A power conversion device and an energy storage device as claimed in any one of claims 1 to 11, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

13. A charging network, characterized in that, include: The charging pile and the energy storage device as described in any one of claims 1 to 11, or the energy storage system as described in claim 12, wherein the energy storage device is used to provide electrical energy to the charging pile.

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