Energy storage device, energy storage system and charging network

Abstract

Disclosed in the embodiments in the present application are an energy storage device, an energy storage system, and a charging network. The energy storage device comprises: a compartment, the compartment comprising a battery compartment and a thermal management unit compartment, wherein the battery compartment is configured to accommodate a plurality of battery devices, the thermal management unit compartment is configured to accommodate a thermal management unit, the thermal management unit is configured to adjust the temperature of the plurality of battery devices, and a housing of the thermal management unit comprises a first wall, which is provided with an exhaust area; and a flow guide structure, the flow guide structure covering the exhaust area, and the flow guide structure being configured to guide gas, which is exhausted from the exhaust area, to be exhausted obliquely upwards in the direction of gravity. The energy storage device, the energy storage system and the charging network in the embodiments in the present application can improve the performance of the energy storage device.

Description

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

[0001] This application claims priority to Chinese patent application CN202510120666.9, filed on January 24, 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 performance of the energy storage device.

[0005] In a first aspect, an energy storage device is provided, comprising: a housing including a battery compartment; a plurality of battery devices housed in the battery compartment; a thermal management unit for regulating the temperature of the plurality of battery devices, the housing of the thermal management unit having an exhaust area; and a flow guiding structure covering the exhaust area, the flow guiding structure for guiding the gas discharged from the exhaust area to be discharged obliquely upward.

[0006] Therefore, the energy storage device of this application embodiment, through the set flow guiding structure, tilts the high-temperature gas discharged from the thermal management unit upwards, reducing the impact of the gas on other surrounding components. Furthermore, the discharged gas can fully exchange heat with the ambient atmosphere, reducing the risk of heat island effect, reducing the risk of excessively high temperature in the air intake area of ​​the thermal management unit, improving the energy efficiency of the thermal management unit, reducing system power consumption, and improving the performance of the energy storage device.

[0007] In some embodiments, the flow guiding structure includes multiple guide vanes spaced apart along the direction of gravity. Each guide vane is inclined upwards from the bottom in a direction away from the thermal management unit, so that the gas discharged from the exhaust area is discharged obliquely upwards between the guide vanes. By the relative inclination of the guide vanes in the flow guiding structure, when the gas discharged from the exhaust area is discharged through the gaps between the guide vanes, it is guided by the guide vanes, allowing the higher-temperature gas discharged from the thermal management unit to be discharged obliquely upwards from the thermal management unit compartment. This reduces the amount of gas discharged horizontally, thus reducing the impact of the exhaust gas on other surrounding components, such as those facing the first wall. Furthermore, the gas discharged obliquely upwards through the flow guiding structure can exchange heat sufficiently with the ambient atmosphere, reducing the risk of a heat island effect. This also reduces the risk of excessively high-temperature gas being drawn into the intake area of ​​the thermal management unit, improving the energy efficiency of the thermal management unit, reducing system power consumption, and improving the performance of the energy storage device.

[0008] In some embodiments, along the direction of gravity, the interval between any two adjacent guide vanes in the plurality of guide vanes is equal, so that when the gas discharged from the exhaust area passes through the intervals between different guide vanes, the gas can be discharged more evenly in the same direction, so as to facilitate the adjustment of the direction of the discharged gas.

[0009] In some embodiments, each guide vane includes two surfaces disposed opposite to each other along the thickness direction of each guide vane; wherein both surfaces are planar, or both surfaces are arcuate surfaces that bulge toward a direction away from the thermal management unit. This design offers flexibility and ease of manufacturing.

[0010] In some embodiments, the flow guiding structure further includes two side plates disposed opposite to each other, with both ends of each flow guiding plate connected between the two side plates to fix multiple flow guiding structures.

[0011] In some embodiments, each guide plate is fixedly connected to or detachably connected to the two side plates. Fixed connection can improve the stability and service life of the guide structure, while detachable connection facilitates installation, disassembly and maintenance.

[0012] In some embodiments, each guide vane is rotatably connected to the two side plates about a rotation axis. This allows adjustment of the angle at which the gas exiting the exhaust area passes through the gaps between the multiple guide vanes, thus making it suitable for different scenarios.

[0013] In some embodiments, each deflector extends beyond the side plate in a direction away from the exhaust area, thereby allowing for greater flexibility in the position, size, and installation of the deflectors.

[0014] In some embodiments, the flow guiding structure further includes two connecting plates arranged opposite to each other. Each connecting plate is used to connect the two side plates so that the two connecting plates and the two side plates form the outer frame of the flow guiding structure, allowing multiple flow guiding plates to be fixed within the outer frame. The quadrilateral outer frame can improve the stability and reliability of the flow guiding structure, thereby increasing the service life of the flow guiding structure.

[0015] In some embodiments, the flow guide structure is fixed to the housing to facilitate its installation. Alternatively, the flow guide structure is fixed to the outer casing so that it is closer to the exhaust area of ​​the thermal management unit to facilitate timely exhaust and improve heat dissipation efficiency.

[0016] In some embodiments, the flow guiding structure is detachably fixed to the compartment; or, the flow guiding structure is detachably fixed to the outer shell for ease of transport.

[0017] In some embodiments, the housing includes a thermal management unit compartment, in which the thermal management unit is housed; the thermal management unit compartment is located at one end of the battery compartment along the length of the energy storage device, and the exhaust area is located at the end of the energy storage device along its length and / or width; alternatively, the housing includes two battery compartments, with the thermal management unit compartment located between the two battery compartments along the length of the energy storage device, and the exhaust area located at the end of the energy storage device along its width. This improves temperature regulation efficiency and facilitates heat dissipation.

[0018] In some embodiments, the housing further includes an air intake area, which is distributed along the direction of gravity with the exhaust area; and / or, the air intake area and the exhaust area are located on different walls of the housing. By reasonably setting the position of the air intake area, the gas entering the thermal management unit through the air intake area can fully exchange heat and then be discharged from the exhaust area, thereby improving heat dissipation efficiency.

[0019] In some embodiments, the thermal management unit includes a fan located in the exhaust area, with the fan's outlet direction facing the guide structure. The fan allows gas to be drawn in from the intake area, undergoing heat exchange, and then discharged from the exhaust area to the external environment at a higher temperature.

[0020] In some embodiments, the thermal management unit further includes a pressure pump, an evaporator, a compressor, and a condenser; the pressure pump, the evaporator, and the thermal management components of the plurality of battery devices form a coolant circuit, the evaporator, the compressor, and the condenser form a refrigerant circuit, and the fan dissipates heat from the condenser. The condenser is located between the fan and the flow guide structure, or the condenser is located on the side of the fan away from the flow guide structure. The pressure pump, evaporator, and compressor are all located at one end of the fan and the condenser along the direction of gravity. Placing the fan and condenser on the same side improves the fan's heat dissipation efficiency. Furthermore, considering that the condenser and fan are typically large, the remaining components of the thermal management unit, such as the pressure pump, evaporator, and compressor, are located at the other end of the direction of gravity G, which maximizes space utilization, increases the integration of the thermal management unit, and facilitates temperature regulation of the battery compartment.

[0021] In a second aspect, an energy storage system is provided, comprising: a power conversion device, a transformer, and an energy storage device as described in the first aspect or any embodiment thereof, wherein the power conversion device and the transformer are used to electrically connect a power generation device and the energy storage device.

[0022] In some embodiments, the energy storage system includes an adjacent component disposed adjacent to the energy storage device. The connected component includes the power conversion device and / or transformer, and the adjacent component faces the exhaust area. Since the exhaust area can discharge hot gas at an angle upwards instead of directly towards the adjacent component, the impact of the high-temperature gas on the adjacent component can be reduced, thereby improving the operating efficiency of the energy storage device and the adjacent component and reducing energy consumption.

[0023] In some embodiments, the tilt angle θ of each deflector relative to the direction of gravity satisfies:

[0024] Where L is the distance between the adjacent component and the flow guiding structure, H is the maximum height of the adjacent component relative to the ground along the direction of gravity, and h is the minimum distance between the flow guiding structure and the ground. The units of L, H and h are the same.

[0025] Power conversion devices typically require their own cooling. High-temperature gases are discharged from the exhaust area. If these high-temperature gases raise the ambient temperature around the power conversion device, its cooling effect will decrease. Excessive temperature can even prevent the power conversion device from operating at full capacity, resulting in derating. Therefore, by incorporating a flow-guiding structure, the amount of high-temperature gas discharged from the exhaust area towards the power conversion device and / or transformer can be reduced, thereby improving the operating efficiency of the power conversion device and / or transformer and saving power consumption.

[0026] 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 or any embodiment of the second aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the structure of an energy storage device according to an embodiment of this application;

[0028] Figure 2 is a schematic diagram of the battery compartment structure according to an embodiment of this application;

[0029] Figure 3 is a schematic diagram of the structure of a thermal management unit according to an embodiment of this application;

[0030] Figure 4 is a schematic diagram of the flow guiding structure according to an embodiment of this application;

[0031] Figure 5 is a front view schematic diagram of a flow guiding structure according to an embodiment of this application;

[0032] Figure 6 is a cross-sectional schematic diagram of a flow guiding structure according to an embodiment of this application;

[0033] Figure 7 is a partially enlarged cross-sectional view of a flow guiding structure according to an embodiment of this application;

[0034] Figure 8 is a front view schematic diagram of the flow guiding structure according to another embodiment of this application;

[0035] Figure 9 is a cross-sectional schematic diagram of a flow guiding structure according to another embodiment of this application;

[0036] Figure 10 is a partially enlarged cross-sectional view of the flow guiding structure according to another embodiment of this application;

[0037] Figure 11 is a schematic diagram of a flow guide plate according to an embodiment of this application;

[0038] Figure 12 is a schematic block diagram of an energy storage device and adjacent components according to an embodiment of this application;

[0039] Figure 13 is a structural block diagram of a thermal management unit according to an embodiment of this application;

[0040] Figure 14 is another structural block diagram of a thermal management unit according to an embodiment of this application;

[0041] Figure 15 is a structural block diagram of an energy storage system according to an embodiment of this application;

[0042] Figure 16 is a structural block diagram of a charging network according to an embodiment of this application.

[0043] The accompanying drawings are not drawn to scale. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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).

[0052] During the temperature regulation process of the battery devices within the battery compartment, the thermal management unit of an energy storage device discharges high-temperature gas. When this hot gas blows onto other components located around the thermal management unit, such as power converter systems (PCS), it can cause derating of these components and affect their normal operation. Furthermore, since the exhaust area of ​​the thermal management unit is typically front-mounted, the high-temperature gas accumulates around it, creating a heat island effect. This raises the temperature around the thermal management unit, which in turn increases the temperature of the unit's intake area. This leads to reduced energy efficiency of the thermal management unit, increased system power consumption, and increased costs. In extreme cases, the increased ambient temperature may even cause the thermal management unit to malfunction.

[0053] Therefore, embodiments of this application provide an energy storage device, an energy storage system, and a charging network that can solve the aforementioned problems. The energy storage device of this application includes a housing, multiple battery devices, a thermal management unit, and a flow guiding structure. The housing includes a battery compartment for accommodating multiple battery devices, and the thermal management unit regulates the temperature of the multiple battery devices. The outer casing of the thermal management unit has an exhaust area, which is covered by the flow guiding structure. The flow guiding structure guides the gas discharged from the exhaust area upwards to reduce the impact of the discharged gas on surrounding components. Furthermore, the discharged gas can fully exchange heat with the ambient atmosphere, reducing the risk of a heat island effect, reducing the risk of excessively high temperatures in the intake area of ​​the thermal management unit, improving the energy efficiency of the thermal management unit, reducing system power consumption, and improving the performance of the energy storage device.

[0054] The energy storage device described in this application can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the 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 can be any power system that requires energy storage.

[0055] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0056] 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 11 and a plurality of battery devices 10. The housing 11 includes a battery compartment 111, and the plurality of battery devices 10 are housed in the battery compartment 111.

[0057] 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.

[0058] It should be understood that the battery compartment 111 in this application embodiment can be used to accommodate battery devices 10. The multiple battery devices 10 can be electrically connected in series, parallel or series-parallel hybrid connection to obtain different capacities and voltages.

[0059] The battery apparatus 10 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.

[0060] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. In this application embodiment, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate its active materials and continue to be used. 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 this application embodiment is not limited to these types.

[0061] 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.

[0062] In some embodiments, the battery device 10 may be a battery pack, which includes a battery housing and one or more individual battery cells housed within the battery housing.

[0063] As an example, a battery cell assembly can be a battery module, which can be housed in a battery housing by fixing the battery module in the battery housing.

[0064] As an example, battery cell assemblies can also be housed in a battery housing by directly fixing multiple battery cells to the battery housing.

[0065] As an example, the battery housing may include a first housing section and a second housing section. The first housing section and the second housing section are fastened together to form a closed space inside the battery housing for housing individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing section may be a top cover or a bottom plate.

[0066] As an example, the battery 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 battery enclosure to house individual battery cells.

[0067] In some embodiments, the battery housing may be part of the vehicle's chassis structure. For example, a portion of the battery housing may be at least a part of the vehicle's floor, or a portion of the battery housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0068] Figure 2 shows a schematic diagram of the battery compartment 111 according to an embodiment of this application. In some embodiments, the battery compartment 111 of the energy storage device 1 according to this application can be used to accommodate one or more battery clusters to improve the voltage and capacity of the energy storage device 1. For example, as shown in Figure 2, the battery compartment 111 can accommodate four battery clusters, that is, a row of battery devices 10 arranged along the height direction Z of the energy storage device constitutes one battery cluster. Each battery cluster in this application embodiment may include multiple battery devices 10. For example, multiple battery devices 10 are connected in series through a busbar to improve the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are usually connected in parallel to improve the capacity of the energy storage device 1.

[0069] In some embodiments, the battery compartment 111 of the energy storage device 1 of this application embodiment can also be used to house the main control module 101. The main control module 101 can serve as a battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module 101 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 101 includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0070] In some embodiments, the energy storage device 1 may be provided with one or more battery compartments 111. For example, as shown in FIG2, the energy storage device 1 may include one battery compartment 111 for accommodating all battery devices 10. As another example, as shown in FIG1, the energy storage device 1 may include multiple battery compartments 111, each battery compartment 111 for accommodating multiple battery devices 10. For example, each battery compartment 111 may be used to accommodate a battery cluster, so that multiple battery compartments 111 can accommodate multiple battery clusters for ease of installation.

[0071] In this embodiment of the application, the energy storage device 1 further includes a thermal management unit 20, which is used to regulate the temperature of the plurality of battery devices 10.

[0072] In some embodiments, the housing 11 of the energy storage device 1 can also be used to accommodate the thermal management unit 20. For example, the housing 11 can also include a thermal management unit compartment 112, which is used to accommodate the thermal management unit 20. The relative positions of the thermal management unit compartment 112 and the battery compartment 111 can be set according to the actual application. For example, Figure 1 shows the thermal management unit compartment 112 and the battery compartment 111 arranged along the length direction X of the energy storage device 1, but the embodiments of this application are not limited to this.

[0073] Figure 3 shows a schematic diagram of the structure of the thermal management unit 20 according to an embodiment of this application. For example, the thermal management unit 20 shown in Figure 3 can be a possible implementation of the thermal management unit 20 included in the energy storage device 1 shown in Figure 1. The thermal management unit 20 can be housed in the thermal management unit compartment 112 shown in Figure 1.

[0074] In this embodiment, the thermal management unit 20 is provided with an exhaust zone 2311. The energy storage device 1 also includes a flow guiding structure 12, which covers the exhaust zone 2311 and is used to guide the gas discharged from the exhaust zone 2311 to be discharged upward at an angle.

[0075] It should be understood that the thermal management unit 20 in this embodiment may include a housing 23, an exhaust region 2311 disposed on the housing 23, and other components of the thermal management unit 20 housed within the housing 23. Specifically, the housing 23 may include multiple walls, wherein the exhaust region 2311 may be disposed on the first wall 231 of the housing 23, and the first wall 231 may be any one of the multiple walls. For example, as shown in FIG3, taking the housing 23 of the thermal management unit 20 as a cuboid, the housing 23 may include six walls. In this embodiment, the first wall 231 where the exhaust region 2311 is located is a wall perpendicular to the length direction X of the energy storage device 1.

[0076] The housing 23 of this application embodiment is provided with an exhaust region 2311, which may occupy at least a portion of the first wall 231 of the housing 23. For example, the thermal management unit 20 may be used to regulate the temperature of the battery device 10 in the battery compartment 111, and the exhaust region 2311 is used for the thermal management unit 20 to exhaust gas to the outside.

[0077] It should be understood that the flow guiding structure 12 of this application embodiment can guide the gas discharged from the exhaust region 2311 to be discharged at an angle upward, that is, guided by the flow guiding structure 12, the gas discharged from the exhaust region 2311 is discharged at an angle upward relative to the direction of gravity G.

[0078] The energy storage device 1 of this application embodiment, through the provided flow guiding structure 12, can guide the high-temperature gas discharged from the exhaust area 2311 of the thermal management unit 20 to be discharged upwards at an angle, thereby reducing the gas discharged horizontally and thus reducing the impact of the discharged gas on other surrounding components, such as components facing the first wall 231. Furthermore, the gas discharged upwards at an angle through the flow guiding structure 12 can fully exchange heat with the ambient atmosphere, reducing the risk of a heat island effect and thus reducing the risk of excessively high gas temperature entering the thermal management unit 20. This improves the energy efficiency of the thermal management unit 20, reduces system power consumption, and enhances the performance of the energy storage device 1.

[0079] In some embodiments, the housing 23 may further include an intake region 2312 for absorbing gas into the thermal management unit 20. The location of the intake region 2312 in this embodiment can be configured according to the actual application. For example, the intake region 2312 and the exhaust region 2311 may be located on different walls or on the same wall.

[0080] In some embodiments, the first wall 231 of the thermal management unit 20 further includes an air intake region 2312, that is, the air intake region 2312 and the exhaust region 2311 may be located on the same wall for ease of processing.

[0081] In some embodiments, the intake region 2312 and the exhaust region 2311 are distributed along the direction of gravity G so that the gas entering the thermal management unit 20 through the intake region 2312 can undergo sufficient heat exchange before being discharged from the exhaust region 2311. For example, as shown in FIG3, the intake region 2312 may be located below the exhaust region 2311 along the direction of gravity G to reduce the impact of the high-temperature exhaust gas on surrounding components.

[0082] In some embodiments, the intake region 2312 and the exhaust region 2311 are located on different walls of the housing 23. For example, the housing 23 of the thermal management unit 20 may also include a second wall 232, which includes the intake region 2312, to improve heat dissipation efficiency. The second wall 232 may be a wall intersecting with the first wall 231, or it may be a wall opposite to the first wall 231, to improve heat dissipation efficiency.

[0083] In some embodiments, the housing 23 may also be provided with multiple air intake areas 2312. For example, both the first wall 231 and the second wall 232 may be provided with air intake areas 2312 to improve the working efficiency of the thermal management unit 20.

[0084] The flow guiding structure 12 of this application embodiment will now be described with reference to the accompanying drawings. Figure 4 shows a schematic diagram of the flow guiding structure 12 of this application embodiment. For example, the flow guiding structure 12 shown in Figure 4 can be the flow guiding structure 12 shown in Figure 3. The flow guiding structure 12 of this application embodiment can cover the exhaust region 2311, and its specific structure can be set according to actual applications.

[0085] In some embodiments, the flow guiding structure 12 includes a plurality of guide plates 121, which are spaced apart along the gravity direction G. Each guide plate 121 is inclined from bottom to top in a direction away from the thermal management unit 20, so that the gas discharged from the exhaust region 2311 is discharged obliquely upward from between the plurality of guide plates 121. The plurality of guide plates 121 are spaced apart along the gravity direction G. For example, in this embodiment, the gravity direction G is parallel to the height direction Z of the energy storage device 1, but this embodiment is not limited to this.

[0086] In this embodiment of the application, each of the plurality of guide vanes 121 is inclined from bottom to top in a direction away from the thermal management unit 20. As shown in FIG4, along the direction of gravity G, each guide vane 121 includes an upper edge 1211 and a lower edge 1212. Both the upper edge 1211 and the lower edge 1212 extend along the length direction of the guide vane 121. The upper edge 1211 is located above the lower edge 1212, and the upper edge 1211 is further away from the thermal management unit 20 than the lower edge 1212, so that each guide vane 121 is relatively inclined.

[0087] The energy storage device 1 of this application embodiment, through the relatively inclined guide plates 121 of the provided flow guiding structure 12, allows the gas discharged from the exhaust region 2311 to be guided by the guide plates 121 when it is discharged through the gaps between the multiple guide plates 121. This guides the higher-temperature gas discharged from the thermal management unit 20 to be discharged obliquely upwards into the thermal management unit compartment 112, thereby reducing the amount of gas discharged horizontally and thus reducing the impact of the exhaust gas on other surrounding components, such as those facing the first wall 231. Furthermore, the gas discharged obliquely upwards through the flow guiding structure 12 can fully exchange heat with the ambient atmosphere, reducing the risk of a heat island effect. This also reduces the risk of the gas being drawn into the intake region 2312 of the thermal management unit 20 becoming too hot, improving the energy efficiency of the thermal management unit 20, reducing system power consumption, and improving the performance of the energy storage device 1.

[0088] Figure 5 shows a front view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 5 can be a front view of the flow guiding structure 12 shown in Figure 4. Figure 6 shows a cross-sectional view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 6 can be a cross-sectional view of the flow guiding structure 12 along the A-A' direction shown in Figure 5. Figure 7 shows a partially enlarged cross-sectional view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 7 can be an enlarged view of region B shown in Figure 6.

[0089] It should be understood that the size, shape and other parameters of the plurality of guide plates 121 included in the flow guiding structure 12 of this application embodiment can be set according to actual application.

[0090] In some embodiments, along the direction of gravity G, the spacing between any two adjacent guide vanes 121 can be the same or different. For example, along the direction of gravity G, the spacing between any two adjacent guide vanes 121 is equal. For instance, as shown in Figures 4 to 7, the spacing between any two adjacent guide vanes 121 is equal to L1, so that when the gas discharged from the exhaust region 2311 passes through different spacings between the guide vanes 121, the gas can be discharged more uniformly in the same direction, thus facilitating the adjustment of the direction of the discharged gas.

[0091] It should be understood that the size of the interval between each two adjacent guide vanes 121 in the embodiments of this application can be set according to actual applications. For example, the interval between each two adjacent guide vanes 121 can be set according to the size of the component used to fix the guide vanes 121 and / or the size of each guide vane 121.

[0092] Figure 8 shows another front view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 8 can replace the flow guiding structure 12 shown in Figure 4, that is, Figure 8 shows another possible implementation of the flow guiding structure 12 according to an embodiment of this application. Figure 9 shows another cross-sectional view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 9 can be a cross-sectional view of the flow guiding structure 12 along the C-C' direction shown in Figure 8. Figure 10 shows a partially enlarged cross-sectional view of the flow guiding structure 12 according to an embodiment of this application. For example, Figure 10 can be an enlarged view of region D shown in Figure 9.

[0093] In some embodiments, the flow guiding structure 12 further includes two side plates 122, which are disposed opposite to each other. The two ends of each flow guide plate 121 are connected between the two side plates 122, such that at least a portion of each flow guide plate 121 is located between the two side plates 122, thereby fixing each flow guide plate 121. For example, in this embodiment, the two side plates 122 include a first side plate 1221 and a second side plate 1222. Multiple flow guide plates 121 are connected to the two side plates 122, that is, multiple flow guide plates 121 are sandwiched between the first side plate 1221 and the second side plate 1222.

[0094] In some embodiments, the spacing between each pair of adjacent guide plates 121 can be set according to the dimensions of the two side plates 122. As shown in Figures 5 to 7, if the width W1 of the two side plates 122 of the flow guiding structure 12 is relatively wide, then the dimension of each guide plate 121 along the width direction of the side plate 122 can also be set to be relatively large, and the spacing L1 between each pair of adjacent guide plates 121 is relatively large. Conversely, as shown in Figures 8 to 10, if the width W2 of the two side plates 122 of the flow guiding structure 12 is relatively narrow, the dimension of each guide plate 121 along the width direction of the side plate 122 will also be limited, and is usually smaller, and the spacing L2 between each pair of adjacent guide plates 121 is relatively large. Therefore, along the width direction of the side plate 122, the smaller the size of each guide plate 121, the smaller the interval between each two adjacent guide plates 121; conversely, the larger the size of each guide plate 121, the larger the interval between each two adjacent guide plates 121. This is to adjust the direction of the gas discharged from the exhaust area 2311 as much as possible, so that most or all of the gas is discharged upwards at an angle, reducing the gas from being discharged horizontally. This reduces the impact of the discharged gas on other components and lowers the risk of heat island effect. This also reduces the risk of the temperature of the intake area 2312 of the thermal management unit 20 being too high, improving the energy efficiency of the thermal management unit 20, reducing system power consumption, and improving the performance of the energy storage device 1.

[0095] In some embodiments, the flow guiding structure 12 further includes two connecting plates 124, which are arranged opposite to each other. Each connecting plate 124 is used to connect two side plates 122, so that the two connecting plates 124 and the two side plates 122 form the outer frame of the flow guiding structure 12. As shown in Figures 5 to 10, the flow guiding structure 12 may include two connecting plates 124 located at the top and bottom, each connecting plate 124 being used to connect two side plates. The two connecting plates 124 and the two side plates 122 form a quadrilateral outer frame of the flow guiding structure 12, allowing multiple flow guiding plates 121 to be fixed within the outer frame. The quadrilateral outer frame can improve the stability and reliability of the flow guiding structure 12, thereby increasing the service life of the flow guiding structure 12.

[0096] It should be understood that the shape of the guide plate 121 in this application embodiment can be set according to actual application.

[0097] In some embodiments, each guide vane 121 includes two surfaces 1213 disposed opposite to each other along the thickness direction of each guide vane 121; the shapes of the two surfaces 1213 can be configured according to the actual application. For example, the two surfaces 1213 are typically identical in shape, such that different regions of the two surfaces 1213 are relatively parallel to each other, in order to facilitate processing.

[0098] For example, as shown in Figures 5 to 7, both surfaces 1213 are arc-shaped surfaces that bulge away from the thermal management unit 20 to facilitate machining. Alternatively, as shown in Figures 8 to 10, both surfaces 1213 are flat surfaces to facilitate machining and reduce resistance to exhaust gases. Or, unlike Figures 5 to 10, the two surfaces 1213 may also be arc-shaped surfaces that bulge towards the thermal management unit 20, i.e., opposite to the bending direction shown in Figures 5 to 7. The embodiments of this application are not limited to these.

[0099] It should be understood that the fixing method of the guide plate 121 and the two side plates 122 in the embodiments of this application can be set according to actual applications.

[0100] In some embodiments, as shown in Figures 4 to 10, each guide plate 121 is fixedly connected to two side plates 122, that is, the position of each guide plate 121 relative to the two side plates 122 is fixed, thereby improving the stability and service life of the flow guiding structure 12. Exemplarily, the connection method between each guide plate 121 and each side plate 122 can be configured according to the actual application. For example, each guide plate 121 and each side plate 122 can be connected by welding or snap-fitting. As another example, each guide plate 121 and each side plate 122 can be fixedly connected by a connector 123. For example, the connector 123 may include fasteners such as bolts.

[0101] In some embodiments, each deflector 121 is detachably connected to two side plates 122 to adjust the deflector 121 for different application scenarios, improving the installation flexibility of the deflector 121 and facilitating maintenance. For example, the detachable connection method between each deflector 121 and each side plate 122 can be configured according to the actual application. For instance, each deflector 121 and each side plate 122 can be disassembled and installed via a snap-fit ​​connection. Alternatively, each deflector 121 and each side plate 122 can be detachably connected via bolts or other detachable connectors.

[0102] In some embodiments, each guide vane 121 is rotatably connected to two side plates 122 about a rotation axis. For example, the rotation axis can be perpendicular to the two side plates 122, meaning each guide vane 121 is connected to the two side plates 122. It can also rotate about the rotation axis to adjust the angle at which the gas discharged from the exhaust region 2311 is discharged after passing through the gaps between the multiple guide vanes 121, thus adapting to different scenarios. The rotation axis can be perpendicular to or approximately perpendicular to the two side plates 122, meaning the rotation axis is the extending direction of the guide vane 121, so that when the guide vane 121 rotates about the rotation axis, its tilt direction can be changed.

[0103] It should be understood that the connection position between the guide plate 121 and the two side plates 122 in this embodiment of the application can be set according to the actual application.

[0104] In some embodiments, the entire area of ​​each guide plate 121 is located between two side plates 122, and the two ends of each guide plate 121 near the two side plates 122 are respectively connected to the corresponding side plates 122. For example, as shown in Figures 5 to 7, if the width W1 of the two side plates 122 of the flow guiding structure 12 is relatively wide, then the guide plate 121 can be completely disposed in the area between the two side plates 122, that is, along the width direction of the side plate 122, the guide plate 121 does not exceed the side plate 122, so as to protect the guide plate 121 through the side plate 122 and improve the structural stability.

[0105] Furthermore, when the guide plate 121 is connected to the two side plates 122, the two ends of each guide plate 121 near the two side plates 122 are respectively connected to the corresponding side plates 122. As shown in Figures 5 to 7, the end of the guide plate 121 near the first side plate 1221 is connected to the first side plate 1221, and any partial or all of the end near the first side plate 1221 can be connected to the first side plate 1221. For example, the guide plate 121 and the first side plate 1221 can be connected by two connectors 123. Correspondingly, the end of the guide plate 121 near the second side plate 1222 is connected to the second side plate 1222, and any partial or all of the end near the second side plate 1222 can be connected to the second side plate 1222. For example, corresponding to the connection position between the guide plate 121 and the first side plate 1221, the guide plate 121 and the second side plate 1222 can be connected by two connectors 123. In this embodiment, the two ends of each guide plate 121 near the two side plates 122 can be fixedly connected or rotatably connected to the corresponding side plate 122, but this embodiment is not limited thereto.

[0106] Figure 11 shows a schematic diagram of any one of the guide plates 121 in the embodiments of this application. For example, Figure 11 can be a schematic diagram of any one of the guide plates 121 included in the flow guiding structure 12 shown in Figures 8 to 10, and Figure 11 shows the surface 1213 of the guide plate 121.

[0107] In some embodiments, each deflector 121 extends beyond the side plate 122 in a direction away from the exhaust region 2311, meaning that a portion of each deflector 121 is located between the two side plates 122, and another portion extends beyond the two side plates 122. This allows for greater flexibility in the position, size, and installation of the deflector 121. Exemplarily, each deflector 121 includes a connecting region 1214 and an extension region 1215. The connecting region 1214 is located between and connected to the two side plates 122, and the extension region 1215 extends from the connecting region 1214 in a direction away from the thermal management unit 20. Specifically, as shown in Figures 8 to 11, the guide plate 121 can be fixed to the two side plates 122 only through the connecting area 1214. Then, the extension area 1215 extends from the connecting area 1214 in a direction away from the thermal management unit 20, and no connecting parts are provided between the extension area 1215 and the two side plates 122, so as to improve the flexibility between the guide plate 121 and the two side plates 122.

[0108] In some embodiments, the extension region 1215 is located outside the two side plates 122. For example, as shown in Figures 8 to 11, if the width W2 of the two side plates 122 of the flow guiding structure 12 is narrow, then a local area of ​​the flow guide plate 121 can be set in the area between the two side plates 122, and the extension region 1215 extends to the area other than between the two side plates 122. That is, along the width direction of the side plate 122, the extension region 1215 of the flow guide plate 121 extends beyond the side plate 122 to increase the size of the flow guide plate 121. This allows the flow guide plate 121 to adjust the direction of the gas discharged from the exhaust region 2311, so that most or all of the gas is discharged upwards at an angle, reducing the gas from being discharged horizontally. This reduces the impact of the discharged gas on other components and reduces the risk of heat island effect. This also reduces the risk of the temperature of the intake region 2312 of the thermal management unit 20 being too high, improving the energy efficiency of the thermal management unit 20, reducing system power consumption, and improving the performance of the energy storage device 1.

[0109] It should be understood that the tilt angle of the guide vane 121 in this embodiment can be set according to actual application. For example, the tilt angle of the guide vane 121 can be adjusted according to the distance between other components adjacent to the energy storage device 1 and the exhaust area 2311 of the energy storage device 1, so that the high-temperature gas discharged from the exhaust area 2311 has less impact on other adjacent components.

[0110] Figure 12 shows a schematic block diagram of the energy storage device 1 and adjacent component 6 according to an embodiment of this application. As shown in Figure 12, the energy storage system in which the energy storage device 1 is located may include adjacent component 6 disposed adjacent to the energy storage device 1. For example, the adjacent component 6 may be disposed facing the exhaust region 2311. Since the exhaust region 2311 can discharge the hot gas at an angle upwards instead of directly towards the adjacent component 6, the impact of the high-temperature gas on the adjacent component 6 can be reduced, thereby improving the working efficiency of the energy storage device 1 and the adjacent component 6 and reducing energy consumption.

[0111] In some embodiments, the tilt direction of each guide plate 121 can be set according to the position of the adjacent component 6. For example, if the component 6 adjacent to the energy storage device 1 is positioned towards the first wall 231, then the tilt angle θ of each guide plate 121 relative to the direction of gravity satisfies: tanθ≤L / (Hh), where L is the distance between the adjacent component 6 and the guide structure 12, H is the height of the adjacent component 6 relative to the ground along the direction of gravity G, and h is the minimum distance between the guide structure 12 and the ground, where L, H, and h have the same unit. When the tilt angle θ of each guide plate 121 satisfies the above formula, as shown by the arrow in FIG12, the gas discharged from the exhaust region 2311 is discharged tilted upward after passing through the guide structure 12. This part of the gas will not or is difficult to blow towards the adjacent component 6, which can reduce the influence of this part of high-temperature gas on the adjacent component 6.

[0112] In some embodiments, the tilt angle θ of the guide vane 121 can be adjusted according to the temperature of the gas discharged from the exhaust region 2311. For example, if the temperature of the gas discharged from the exhaust region 2311 is high, the tilt angle θ of each guide vane 121 can be reduced so that the discharged high-temperature gas is discharged as far away from the adjacent component 6 as possible, thereby reducing the impact on the adjacent component 6. Conversely, if the temperature of the gas discharged from the exhaust region 2311 is low, then the lower-temperature gas has less impact on the adjacent component 6, and the tilt angle θ of each guide vane 121 can be appropriately increased so that the discharged gas can be quickly discharged through the guide structure 12, thereby increasing the exhaust rate.

[0113] In some embodiments, if the guide plate 121 is a curved plate with an arc surface, such as shown in Figures 5 to 7, then the tilt angle θ of each guide plate 121 relative to the gravity direction G can refer to the maximum, minimum or average value of the tilt angles of different regions on the guide plate 121 relative to the gravity direction G. The embodiments of this application are not limited thereto.

[0114] It should be understood that the position of the flow guiding structure 12 in this embodiment can be set according to the actual application.

[0115] In some embodiments, the airflow guiding structure 12 is fixed to the housing 23 so that the airflow guiding structure 12 is closer to the exhaust area 2311 of the thermal management unit 20, so as to facilitate timely exhaust and improve heat dissipation efficiency. During installation, the airflow guiding structure 12 can be fixed to the housing 23 of the thermal management unit 20 first, and then the thermal management unit 20 with the airflow guiding structure 12 installed can be accommodated in the thermal management unit compartment 112; or, the thermal management unit 20 can be accommodated in the thermal management unit compartment 112 first, and then the airflow guiding structure 12 can be installed on the housing 23 of the thermal management unit 20 in the thermal management unit compartment 112. The embodiments of this application are not limited to this.

[0116] In some embodiments, the flow guiding structure 12 is fixed to the compartment 11. For example, the flow guiding structure 12 can be fixed to the thermal management unit compartment 112 to facilitate the installation of the flow guiding structure 12. During installation, the thermal management unit 20 is first housed in the thermal management unit compartment 112, and then the flow guiding structure 12 is installed and fixed to the thermal management unit compartment 112 of the compartment 11.

[0117] It should be understood that the flow guiding structure 12 in this embodiment can be installed and fixed in various ways. For example, the flow guiding structure 12 can be fixed to the thermal management unit compartment 112 or the outer shell 23 by welding or other methods.

[0118] In some embodiments, the flow guiding structure 12 is detachably fixed to the housing 11 or the outer shell 23 for ease of transport. Specifically, during transport, since the flow guiding structure 12 is detachable, it can be transported separately from the rest of the energy storage device 1, and then installed on the housing 11 or the outer shell 23 for further transport. For example, the flow guiding structure 12 can protrude from the surface of the housing 11 to improve its flow guiding capacity. Therefore, when transporting the flow guiding structure 12 separately from the rest of the energy storage device 1, especially when the energy storage device 1 is a standard container size, the impact of the protruding flow guiding structure 12 on the transport process can be reduced, improving transport efficiency.

[0119] It should be understood that the relative positional relationship between the thermal management unit compartment 112 and the battery compartment 111 in this embodiment can be set according to actual application. Furthermore, the position of the first wall 231 can be set accordingly based on the relative positional relationship between the thermal management unit compartment 112 and the battery compartment 111.

[0120] In some embodiments, along the length X of the energy storage device 1, the thermal management unit compartment 112 is located at one end of the battery compartment 111, that is, along the length X of the energy storage device 1, the battery compartment 111 is located on one side and the thermal management unit compartment 112 is located on the other side. Correspondingly, the exhaust region 2311 is located at the end of the energy storage device 1 in the length X and / or width Y direction. For example, the first wall 231 where the exhaust region 2311 is located can be perpendicular to the width Y direction of the energy storage device 1, or the first wall 231 can be perpendicular to the length X direction of the energy storage device 1 and be the wall of the outer casing 23 away from the battery compartment 111. That is, the first wall 231 is configured not to face the battery compartment 111 so that the exhaust region 2311 passing through the first wall 231 can discharge gas to the outside.

[0121] In some embodiments, the housing 11 includes two battery compartments 111. Along the length direction X of the energy storage device 1, a thermal management unit compartment 112 is located between the two battery compartments 111. An exhaust region 2311 is located at the end of the width direction Y of the energy storage device 1, meaning the first wall 231 containing the exhaust region 2311 is perpendicular to the width direction Y of the energy storage device 1. Positioning the two battery compartments 111 on either side of the thermal management unit compartment 112 simplifies the connection piping between the thermal management unit 20 and the battery device 10, improving temperature regulation efficiency.

[0122] It should be understood that the design of the internal components of the thermal management unit 20 in this application embodiment can be configured according to actual applications.

[0123] In some embodiments, the thermal management unit 20 includes a fan 218 located in the exhaust region 2311, with the fan 218's outlet direction facing the guide structure 12. The fan 218 draws in gas from the intake region 2312, performs heat exchange, and then, because the fan 218's outlet direction faces the guide structure 12, discharges the high-temperature gas from the exhaust region 2311 to the external environment.

[0124] In this embodiment, the thermal management unit 20 can be a liquid-cooled unit and / or an air-cooled unit to achieve heat dissipation. The following description uses a liquid-cooled unit as an example. Figure 13 shows a structural block diagram of the thermal management unit 20 for regulating the temperature of the battery device 10 within the battery compartment 111, according to an embodiment of this application.

[0125] As shown in Figure 13, the thermal management 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 multiple battery devices 10 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.

[0126] In some embodiments, as shown in FIG13, the connection relationship between the pressure pump 221, evaporator 211, compressor 212, and condenser 213 may include: the coolant inlet and coolant outlet of the evaporator 211 are connected to multiple battery devices 10, for example, the thermal management components of the multiple battery devices 10 may be connected to regulate the temperature of the multiple battery devices 10. The pressure pump 221 is connected between the multiple battery devices 10 and the coolant inlet of the evaporator 211, the refrigerant outlet of the evaporator is connected to the inlet of the compressor 212, the outlet of the compressor 212 is connected to the inlet of the condenser 213, and the outlet of the condenser 213 is connected to the refrigerant inlet of the evaporator 211.

[0127] It should be understood that the temperature between the thermal management unit 20 and the battery device 10 in the battery compartment 111 of this application embodiment can be regulated via the refrigerant circuit 21 and the coolant circuit 22. For example, Figure 13 shows the approximate path of the coolant circuit 22 through multiple arrows on the left and the approximate path of the refrigerant circuit 21 through multiple arrows on the right. Specifically, the refrigerant circuit 21 can be used to provide cooling, while the coolant circuit 22 can correspondingly 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 111 for transferring coolant.

[0128] For example, if the temperature of the battery device 10 inside the battery compartment 111 is low, the thermal management unit 20 needs to heat up the battery device 10. 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 10 through the coolant pipe. For example, the coolant can be transferred to the thermal management component inside the battery device 10 through the coolant pipe, so that the coolant can exchange heat with the battery cells inside the battery device 10 through the thermal management component, thereby raising the temperature.

[0129] Conversely, if the temperature of the battery unit 10 inside the battery compartment 111 is high, the thermal management unit 20 needs to cool the battery unit 10. At this time, the refrigerant circuit 21 starts working. The refrigerant in the refrigerant circuit 21 is compressed by the compressor 212. The high-temperature, high-pressure gas discharged from the output end 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 10 through the coolant pipes. For example, the coolant can be transferred to the thermal management components inside the battery unit 10 through the coolant pipes, so that the coolant can exchange heat with the individual battery cells inside the battery unit 10 through the thermal management components, thereby cooling down.

[0130] It should be understood that the thermal management unit 20 of this application embodiment may also include other components. For example, FIG14 shows another structural block diagram of the thermal management unit 20 of this application embodiment for regulating the temperature of the battery device 10 in the battery compartment 111.

[0131] In some embodiments, as shown in FIG14, the thermal management unit 20 may further include: an expansion tank 222, a liquid receiver 214, and an expansion valve 215. The expansion tank 222 is connected between the plurality of battery devices 10 and the pressure pump 221. The liquid receiver 214 is connected between the output end of the condenser 213 and the refrigerant input end of the evaporator 211. The expansion valve 215 is connected between the liquid receiver 214 and the refrigerant input end of the evaporator 211. By further configuring the expansion tank 222, the liquid receiver 214, and the expansion valve 215, the thermal management unit 20 can be optimized, and its temperature regulation capability can be improved.

[0132] 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.

[0133] 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 end of the condenser 213. When the refrigerant in the refrigerant circuit 21 is insufficient, automatic liquid replenishment can be achieved.

[0134] 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.

[0135] Furthermore, as shown in Figure 14, the thermal management unit 20 may further include 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, and a high-pressure controller 217. The first ball valve 223 is located between the plurality of battery devices 10 and the expansion tank 222; the second ball valve 224 is located between the coolant output end of the evaporator 211 and the plurality of battery devices 10; the float switch 225 is located in the expansion tank 222; the low-pressure controller 216 is connected between the refrigerant output end of the evaporator 211 and the input end of the compressor 212; and the high-pressure controller 217 is connected between the liquid receiver 214 and the output end of the condenser 213. By further configuring the above components, the thermal management unit 20 can be further optimized, and its temperature regulation capability can be improved.

[0136] In this embodiment, the first ball valve 223 is located between the multiple battery devices 10 and the expansion tank 222 in the coolant circuit 22, and the second ball valve 224 is located between the coolant output end of the evaporator 211 and the multiple battery devices 10 in the coolant circuit 22. The two ball valves can be used to control whether the coolant flows in the coolant circuit 22.

[0137] 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.

[0138] The low-pressure controller 216 of this embodiment is disposed at the input end of the compressor 212 in the refrigerant circuit 21. For example, it can be disposed between the refrigerant output end of the evaporator 211 and the input end of the compressor 212, so as to stop the operation of the compressor 212 when the pressure of the refrigerant input at the input end 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.

[0139] In this embodiment, the high-pressure controller 217 is located between the liquid storage tank 214 and the output terminal 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 the set value at this time, 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.

[0140] In some embodiments, the thermal management 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 10. 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 to this.

[0141] It should be understood that the fan 218 in this embodiment can be used to dissipate heat from the condenser 213. For example, the fan 218 may include one or more fans, and the airflow from the fans can remove the heat from the high-temperature and high-pressure gas, thereby quickly enabling the condenser 213 to condense the gas into liquid refrigerant.

[0142] It should be understood that all the above-mentioned components of the thermal management unit 20 in this application embodiment can be located inside the housing 23, and the specific installation positions of each component in the thermal management unit 20 can be flexibly set according to actual applications.

[0143] In some embodiments, both the condenser 213 and the fan 218 can be positioned corresponding to the exhaust area 2311 to facilitate heat dissipation. The specific locations of the condenser 213 and the fan 218 can be set according to the actual application.

[0144] For example, the condenser 213 is located between the fan 218 and the flow guide structure 12 so that the fan 218 can exhaust air toward the condenser 213 to help the condenser 213 dissipate heat. The air exhausted by the fan 218 will carry heat after passing through the condenser 213, and the high-temperature gas will then be discharged through the flow guide structure 12.

[0145] For example, if the condenser 213 is located on the side of the fan 218 away from the guide structure 12, the gas drawn in by the fan 218 will first pass through the condenser 213, which can help the condenser 213 dissipate heat, so that the fan 218 draws in gas with heat, and then the gas with heat is discharged through the guide structure 12.

[0146] In some embodiments, the condenser 213 and the fan 218 are arranged corresponding to the exhaust area 2311, and the pressure pump 221, evaporator 211, and compressor 212 are all located at one end of the fan 218 and condenser 213 along the direction of gravity. In this embodiment, the fan 218 is mainly used to dissipate heat from the condenser 213; therefore, placing the fan 218 and condenser 213 on the same side can improve the heat dissipation efficiency of the fan 218. Furthermore, considering that the condenser 213 and fan 218 are typically large, the remaining components of the thermal management unit 20, such as the pressure pump 221, evaporator 211, and compressor 212, are all located at the other end of the direction of gravity G, which can maximize space utilization, increase the integration of the thermal management unit 20, and facilitate temperature regulation of the battery compartment 111.

[0147] In some embodiments, all other components of the thermal management unit 20, except for the condenser 213 and the fan 218, can be located at one end of the condenser 213 and the fan 218 along the direction of gravity G, so as to maximize space utilization, increase the integration of the thermal management unit 20, and facilitate temperature regulation for the battery compartment 111 below.

[0148] In some embodiments, the evaporator 211 in the thermal management unit 20 is typically located close to the condenser 213. For example, if the condenser 213 and the fan 218 are located at one end along the direction of gravity G, while other components are located at the other end, the evaporator 211 will be closer to the condenser 213 and the fan 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 218, that is, the fan 218 can cool both the evaporator 211 and the condenser 213, thereby improving temperature regulation efficiency and reducing power consumption.

[0149] In some embodiments, the energy storage device 1 may also include other components. For example, the storage unit 11 may also include an electrical compartment 113, which can be used to house electrical components. For example, the electrical compartment 113 can be used to house modules such as a central control module, a power distribution module, and a fire protection module.

[0150] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module 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.

[0151] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0152] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0153] It should be understood that the relative positions of the battery compartment 111, thermal management unit compartment 112, and electrical compartment 113 of the compartment 11 in this application embodiment can be set according to actual application. For example, this application embodiment mainly takes the distribution of the battery compartment 111, thermal management unit compartment 112, and electrical compartment 113 along the length direction of the energy storage device 1 as an example, but this application embodiment is not limited to this.

[0154] 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 15 shows a structural block diagram of the energy storage system according to an embodiment of this application. In some embodiments, as shown in Figure 15, the energy storage system may include one or more energy storage devices 1, a power conversion device 2, and a transformer 7, wherein the power conversion device 2 and the transformer 7 are used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, which can be stored in the energy storage device 1 through the power conversion device 2. For example, the power conversion device 2 can convert the AC power generated by the power generation device 3 into DC power for storage in the energy storage device 1; in addition, the power conversion device 2 can also convert the DC power in the energy storage device 1 into AC power for use by the power grid or load. The transformer 7 is used to boost the voltage of the electrical energy to meet the requirements of the transmission line. For example, the transformer 7 can be used to boost the low-voltage AC power output by the power conversion device 2 to the high-voltage power required by the transmission line. 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.

[0155] In some embodiments, the adjacent component 6 arranged opposite to the energy storage device 1, as shown in FIG12, may include a power conversion device 2. The power conversion device 2 typically requires its own cooling, and the exhaust region 2311 discharges high-temperature gas. If the high-temperature gas raises the ambient temperature around the power conversion device 2, the cooling effect of the power conversion device 2 will decrease, and excessively high temperatures may even prevent the power conversion device 2 from operating at full load, resulting in derating. Therefore, by providing the flow guiding structure 12, the discharge of high-temperature gas from the exhaust region 2311 towards the power conversion device 2 can be reduced, thereby improving the operating efficiency of the power conversion device 2 and saving power consumption.

[0156] In some embodiments, the adjacent component 6 arranged opposite to the energy storage device 1 as shown in FIG12 may also include a transformer 7. By providing the flow guiding structure 12, the exhaust area 2311 can be reduced to discharge high-temperature gas toward the transformer 7, thereby improving the working efficiency of the transformer 7 and saving power consumption.

[0157] According to some embodiments of this application, a charging network is provided. FIG16 shows a structural block diagram of the charging network according to an embodiment of this application. As shown in FIG16, 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) so as to replenish the energy of the electrical device.

[0158] 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.

[0159] According to some embodiments of this application, referring to Figures 4 to 11, this application provides an energy storage device 1, including: a housing 11, the housing 11 including a battery compartment 111; a plurality of battery devices 10, housed in the battery compartment 111; a thermal management unit 20, the thermal management unit 20 being used to regulate the temperature of the plurality of battery devices 10, the outer casing 23 of the thermal management unit 20 being provided with an exhaust area 2311; and a flow guiding structure 12, the flow guiding structure 12 covering the exhaust area 2311, the flow guiding structure 12 being used to guide the gas discharged from the exhaust area 2311 to be discharged obliquely upward.

[0160] The flow guiding structure 12 includes a plurality of flow guide plates 121, which are spaced apart along the direction of gravity. Each flow guide plate 121 is inclined from bottom to top in a direction away from the thermal management unit 20, so that the gas discharged from the exhaust zone 2311 is discharged obliquely upward between the plurality of flow guide plates 121. Along the direction of gravity, the spacing between any two adjacent flow guide plates 121 is equal. Each flow guide plate 121 includes two surfaces 1213 arranged opposite each other along the thickness direction of each flow guide plate 121; wherein, both surfaces 1213 are planar, or both surfaces 1213 are arcuate surfaces, the arcuate surfaces protruding in a direction away from the thermal management unit 20.

[0161] The flow guiding structure 12 also includes two side plates 122, which are arranged opposite to each other. The two ends of each flow guide plate 121 are connected between the two side plates 122. Each flow guide plate 121 is fixedly connected to or detachably connected to the two side plates 122. Alternatively, each flow guide plate 121 is rotatably connected to the two side plates 122 about a rotation axis. The flow guiding structure 12 is detachably fixed to the chamber 11; or, the flow guiding structure 12 is detachably fixed to the outer shell 23.

[0162] The housing 11 includes a thermal management unit housing 112, in which the thermal management unit 20 is housed; along the length of the energy storage device, the thermal management unit housing 112 is located at one end of the battery housing 111, and the exhaust area 2311 is located at the end of the energy storage device in the length and / or width direction; or, the housing 11 includes two battery housings 111, and along the length of the energy storage device, the thermal management unit housing 112 is located between the two battery housings 111, wherein the exhaust area 2311 is located at the end of the energy storage device in the width direction.

[0163] The housing 23 also includes an intake region 2312, which is distributed along the direction of gravity with the exhaust region 2311; and / or, the intake region 2312 and the exhaust region 2311 are located on different walls of the housing 23.

[0164] The thermal management unit 20 includes a fan 218 located in the exhaust area 2311, with the fan 218's outlet air directed towards the airflow guide structure 12. The thermal management unit 20 also includes a pressure pump 221, an evaporator 211, a compressor 212, and a condenser 213. The pressure pump 221, evaporator 211, and multiple battery devices 10 form a coolant circuit 22. The evaporator 211, compressor 212, and condenser 213 form a refrigerant circuit 21. The fan 218 dissipates heat from the condenser 213, which is located between the fan 218 and the airflow guide structure 12, or on the side of the fan 218 away from the airflow guide structure 12. The pressure pump 221, evaporator 211, and compressor 212 are all located at one end of the fan 218 and condenser 213 along the direction of gravity.

[0165] 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 (11) includes a battery compartment (111); Multiple battery devices (10) are housed in the battery compartment (111); A thermal management unit (20) for regulating the temperature of the plurality of battery devices (10), the housing (23) of the thermal management unit (20) being provided with an exhaust area (2311); and A flow guiding structure (12) covers the exhaust region (2311) and is used to guide the gas discharged from the exhaust region (2311) to be discharged obliquely upward.

2. The energy storage device according to claim 1, characterized in that, The flow guiding structure (12) includes a plurality of flow guiding plates (121), which are spaced apart along the direction of gravity. Each of the plurality of flow guiding plates (121) is inclined from bottom to top in a direction away from the thermal management unit (20), so that the gas discharged from the exhaust area (2311) is discharged obliquely upward from between the plurality of flow guiding plates (121).

3. The energy storage device according to claim 2, characterized in that, Along the direction of gravity, the spacing between any two adjacent guide vanes (121) is equal.

4. The energy storage device according to claim 2 or 3, characterized in that, Each guide vane (121) includes two surfaces (1213) disposed opposite to each other along the thickness direction of each guide vane (121); Wherein, both surfaces (1213) are planes, or, Both surfaces (1213) are arc surfaces, which bulge out in a direction away from the thermal management unit (20).

5. The energy storage device according to any one of claims 2 to 4, characterized in that, The flow guiding structure (12) also includes two side plates (122), which are arranged opposite to each other, and the two ends of each flow guiding plate (121) are connected between the two side plates (122).

6. The energy storage device according to claim 5, characterized in that, Each guide plate (121) is fixedly connected to or detachably connected to the two side plates (122).

7. The energy storage device according to claim 5, characterized in that, Each of the guide vanes (121) is rotatably connected to the two side plates (122) about a rotation axis.

8. The energy storage device according to any one of claims 5 to 7, characterized in that, Each of the deflectors (121) extends beyond the side plate (122) in a direction away from the exhaust region (2311).

9. The energy storage device according to any one of claims 5 to 8, characterized in that, The flow guiding structure (12) further includes two connecting plates (124), which are arranged opposite to each other. Each connecting plate (124) is used to connect the two side plates (122) so that the two connecting plates (124) and the two side plates (122) form the outer frame of the flow guiding structure (12).

10. The energy storage device according to any one of claims 1 to 9, characterized in that, The flow guiding structure (12) is fixed to the chamber body (11); or, The flow guiding structure (12) is fixed to the outer shell (23).

11. The energy storage device according to any one of claims 1 to 9, characterized in that, The flow guiding structure (12) is detachably fixed to the chamber body (11); or, The flow guiding structure (12) is detachably fixed to the outer shell (23).

12. The energy storage device according to any one of claims 1 to 11, characterized in that, The compartment (11) includes a thermal management unit compartment (112), in which a thermal management unit (20) is housed; Along the length of the energy storage device, the thermal management unit compartment (112) is located at one end of the battery compartment (111), and the exhaust area (2311) is located at the end of the energy storage device in the length and / or width directions; or, The housing (11) includes two battery compartments (111), and the thermal management unit compartment (112) is located between the two battery compartments (111) along the length direction of the energy storage device, wherein the exhaust area (2311) is located at the end of the width direction of the energy storage device.

13. The energy storage device according to any one of claims 1 to 12, characterized in that, The outer casing (23) also includes an air intake area (2312); The intake area (2312) and the exhaust area (2311) are distributed along the direction of gravity, and / or the intake area (2312) and the exhaust area (2311) are located on different walls of the outer casing (23).

14. The energy storage device according to claim 13, characterized in that, Along the direction of gravity, the intake region (2312) is located below the exhaust region (2311); and / or, The wall containing the intake area (2312) is positioned opposite the wall containing the exhaust area (2311).

15. The energy storage device according to any one of claims 1 to 14, characterized in that, The thermal management unit (20) includes a fan (218) located in the exhaust area (2311) and the air outlet direction of the fan (218) is toward the guide structure (12).

16. The energy storage device according to claim 15, characterized in that, The thermal management unit (20) also 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 (10) 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). The fan (218) is used to dissipate heat for the condenser (213), the condenser (213) is located between the fan (218) and the flow guide structure (12), or the condenser (213) is located on the side of the fan (218) away from the flow guide structure (12); The pressure pump (221), the evaporator (211), and the compressor (212) are all located at one end of the fan (218) and the condenser (213) along the direction of gravity.

17. An energy storage system, characterized in that, include: Power conversion device (2); Transformer (7); The energy storage device according to any one of claims 1 to 16, wherein the power conversion device (2) and the transformer (7) are used to electrically connect the power generation device (3) and the energy storage device.

18. The energy storage system according to claim 17, characterized in that, The energy storage system includes an adjacent component (6) disposed adjacent to the energy storage device, the adjacent component (6) including the power conversion device (2) and / or the transformer (7), the adjacent component (6) facing the exhaust area (2311).

19. The energy storage system according to claim 18, characterized in that, The tilt angle θ of each guide vane (121) relative to the direction of gravity satisfies: Wherein, L is the distance between the adjacent component (6) and the flow guiding structure (12), H is the maximum height of the adjacent component (6) relative to the ground along the direction of gravity, and h is the minimum distance between the flow guiding structure (12) and the ground. The units of L, H and h are the same.

20. A charging network, characterized in that, It includes a charging pile (4) and an energy storage device as claimed in any one of claims 1 to 16 or an energy storage system as claimed in any one of claims 17 to 19, wherein the energy storage device is used to provide electrical energy to the charging pile (4).

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