Energy storage device, energy storage system and charging network

Abstract

The utility model is suitable for the technical field of batteries, and provides an energy storage device, an energy storage system and a charging network, and the energy storage device comprises a box body, an energy storage unit and a heat management module. The heat management module comprises a shell, a heat management part and a fan, the shell is arranged on the box body, the shell is provided with a cavity, a first window and a second window, the first window and the second window are both communicated with the cavity, the fan is arranged on the shell, and at least part of the heat management part is arranged in the cavity and used for conducting heat management on the energy storage unit; when the draught fan rotates forwards, the draught fan is used for driving airflow to flow from the first window to the second window through the cavity so that heat can be exchanged between the heat management component and the airflow. When the fan rotates reversely, the fan is used for driving airflow to flow from the second window to the first window through the cavity. The air flow can be blown out from the first window through the reverse rotation of the fan, so that impurities accumulated at the first window in the shell can be blown out from the first window under the driving of the air flow, the ventilation capacity of the shell is improved, and the heat management effect is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] Energy storage devices are used to store electrical energy and are characterized by convenient installation and transportation, high integration, small footprint, and good scalability. Energy storage devices are an important component of the development of distributed energy, smart grids, and the energy internet within the energy storage field. With the rapid development of new energy technologies, energy storage devices have become one of the more important research directions in the new energy field.

[0003] In related technologies, energy storage devices may include energy storage units and a thermal management module. The thermal management module includes a housing and a fan mounted on the housing. In some cases, during the operation of the energy storage device, dust, snow, leaves, and other impurities from the external environment can easily move towards the air inlet of the housing under the power of the fan. These impurities can be drawn into the housing or accumulate at the air inlet, causing blockage. This affects the ventilation capacity of the housing, thus impacting the thermal management effect.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above problems, the purpose of this application is to provide an energy storage device, an energy storage system and a charging network that can improve the thermal management effect of the energy storage device.

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, embodiments of this application provide an energy storage device, including:

[0008] Box;

[0009] The energy storage unit is located inside the enclosure;

[0010] A thermal management module includes a housing, a thermal management component, and a fan. The housing is mounted on a box and has a cavity, a first window, and a second window. Both the first window and the second window are connected to the cavity. The fan is mounted on the housing. At least a portion of the thermal management component is located inside the cavity and is used to perform thermal management on the energy storage unit.

[0011] When the fan rotates forward, it drives the airflow from the first window through the cavity to the second window for heat exchange between the heating management components and the airflow; when the fan rotates in reverse, it drives the airflow from the second window through the cavity to the first window.

[0012] The energy storage device provided in this application embodiment, when the fan reverses, drives airflow from the second window through the cavity to the first window. This allows the airflow to be blown out of the first window under the power of the fan, enabling impurities accumulated inside the casing at the first window to be expelled by the airflow, thus improving the problem of blockage at the first window and enhancing the ventilation capacity of the casing. Similarly, when the fan rotates forward, the airflow can smoothly flow from the first window through the cavity to the second window for heat exchange with the thermal management components. This improves the fan's thermal management effect on the thermal management components and helps enhance the thermal management effect of the thermal management module on the energy storage unit.

[0013] In some embodiments, the fan is located on the second window.

[0014] This design allows the airflow, powered by the fan, to be directed out of the second window after entering the cavity, thus improving the directionality of airflow within the casing. This enables the airflow to pass smoothly through the casing, exchanging heat with the thermal management components within the cavity, thereby improving the thermal management effect of the components.

[0015] In some embodiments, the fan includes an axial flow fan.

[0016] By configuring the fan as an axial flow fan, a high airflow and air pressure can be maintained even when the fan reverses, thus maintaining a high extraction capacity. This improves the removal of impurities, thereby effectively enhancing the ventilation capacity of the casing and improving the thermal management performance of the energy storage device.

[0017] In some embodiments, the fan includes:

[0018] The housing is located on the outer shell and forms a third window through the first direction;

[0019] The blade structure is at least partially located on the third window;

[0020] A drive unit is mounted on the casing and is used to drive the blade structure to rotate along a first direction; wherein the first direction is the axial direction of the fan.

[0021] By adopting the above technical solution, the fan is made into an axial flow fan, which helps to improve the air extraction capacity when the fan reverses, thereby helping to improve the thermal management effect.

[0022] In some embodiments, the driving device includes a driver and an output shaft. The output shaft includes a shaft body and a protrusion disposed on the outer peripheral wall of the shaft body. The shaft body is fixedly connected to the output end of the driver.

[0023] The blade structure is provided with a fixing groove, which includes a groove body and a first groove on the inner peripheral wall of the groove body. The shaft is inserted into the groove body along the first direction, and the protrusion is inserted into the first groove along the first direction.

[0024] The shaft is inserted into the slot body along the first direction, and the protrusion is inserted into the first groove along the first direction, so that the output shaft can be circumferentially confined within the fixed groove. In this way, when the driver is driven, the blade structure can stably rotate circumferentially with the output shaft, reducing the risk of the blade structure being thrown out of the drive device. This allows the fan to be suitable for larger air volume and air pressure, helps to improve the fan's ventilation effect, and further improves the problem of the first or second window being blocked by impurities.

[0025] In some embodiments, the outer peripheral wall of the shaft is provided with a plurality of protrusions spaced apart in the circumferential direction, and the fixing groove includes a plurality of first grooves arranged around the outer periphery of the groove body, with each protrusion inserted into each first groove.

[0026] This configuration can further improve the circumferential limiting effect of the blade structure and output shaft, thereby helping to improve the fan's suction capacity, further improve the problem of the casing being blocked by impurities, and further enhance the thermal management effect.

[0027] In some embodiments, the blade structure includes a fixing part and a plurality of blades. The fixing part is fixedly connected to the output end of the drive device, and the plurality of blades are arranged at intervals around the fixing part and fixedly connected to the fixing part.

[0028] In the forward rotation direction of the fan, the connection between the blades and the fixed part extends inward along the first direction;

[0029] Along the width direction of the blade, the blade has a first side and a second side. The first side is located outside the second side along the first direction, and the end of the second side away from the fixing part is bent outward along the first direction.

[0030] Therefore, it helps to further improve the removal of impurities from the casing, thereby improving the ventilation capacity of the casing and thus improving the thermal management effect.

[0031] In some embodiments, the width of the blades gradually increases in the radial direction of the fan, moving away from the fixed portion.

[0032] This configuration helps improve the blades' wind-blowing ability when the fan is rotating forward. It also helps improve the fan's ability to expel airflow when rotating in reverse. Therefore, it helps to further improve the removal of impurities from the casing, thereby enhancing the casing's ventilation capacity and ultimately improving thermal management.

[0033] In some embodiments, the curvature of the second side is greater than the curvature of the first side.

[0034] This configuration helps to further enhance the wind-blowing and propulsive capabilities of the blades. Therefore, it helps to further improve the removal of impurities from the casing, thereby improving the casing's ventilation capacity and ultimately enhancing thermal management.

[0035] In some embodiments, the end of the first side away from the fixing part is provided with a second groove.

[0036] By incorporating a second groove, the airflow is depressurized during the rotation of the blades, facilitating smooth airflow through the third window and thus enhancing the fan's extraction capacity. This further improves the removal of impurities from the casing, thereby increasing its ventilation capacity and ultimately improving thermal management.

[0037] In some embodiments, the orthographic outline of the third window is circular on a projection plane perpendicular to the first direction.

[0038] The circular outline of the orthographic projection through the third window helps improve the smoothness of airflow through it. Therefore, it helps to further improve the removal of impurities from the casing, thereby enhancing the casing's ventilation capacity and ultimately improving thermal management performance.

[0039] In some embodiments, the inner peripheral wall of the third window includes a first peripheral wall, a second peripheral wall, and a third peripheral wall. The second peripheral wall and the third peripheral wall are disposed at both ends of the first peripheral wall along a first direction. The housing is provided with a first end face and a second end face at both ends along the first direction. The first end face and the first peripheral wall are connected by an arc of the second peripheral wall, and the second end face and the first peripheral wall are connected by an arc of the third peripheral wall.

[0040] The first end face and the first peripheral wall are connected by a second peripheral wall arc, and the second end face and the first peripheral wall are connected by a third peripheral wall arc. This allows airflow to pass smoothly through the third window under the rotation of the blade structure, thereby improving the fan's suction capacity (including suction capacity during both forward and reverse rotation). Therefore, it helps to further improve the removal of impurities on the casing, thereby improving the casing's ventilation capacity and ultimately enhancing thermal management.

[0041] In some embodiments, the thermal management module further includes a first protective mesh disposed on the second window.

[0042] By installing the first protective net on the second window, it can, on the one hand, block some impurities from entering the fan through the second window, thus helping to improve the fan's operating capacity. On the other hand, it can prevent personnel from accidentally touching the fan, ensuring high reliability.

[0043] In some embodiments, the thermal management module further includes a second protective mesh disposed on the first window.

[0044] The second protective netting installed on the first window serves two purposes: firstly, it blocks some impurities from entering the fan through the second window, thus improving the ventilation capacity of the casing and the fan's exhaust capacity; secondly, it prevents workers from accidentally touching the fan, ensuring high reliability.

[0045] In some embodiments, a wind pressure sensor is provided at the first window.

[0046] This setting allows the first window to be blocked by impurities when the pressure detected by the wind pressure sensor is lower than the preset value. Therefore, the fan needs to be reversed to blow away the impurities in the first window and restore a better wind pressure.

[0047] In some embodiments, the outer casing is disposed on the top of the housing.

[0048] This design increases the height of the thermal management module, reducing the risk of impurities accumulating in the first or second window, thereby improving the ventilation capacity of the casing and enhancing the exhaust effect of the fan.

[0049] In some embodiments, the first window and the second window are respectively disposed on different surfaces of the housing.

[0050] By positioning the first and second windows on different surfaces of the casing, the airflow through the first window, the inner cavity, and the second window is improved, thus enhancing the ventilation capacity of the casing. This, in turn, helps improve the thermal management effect of the fan on the thermal management components.

[0051] In some embodiments, the second window is located at the top of the housing.

[0052] This design allows the heated airflow inside the cavity to flow upwards under the influence of its own temperature and the suction effect of the fan when the fan is rotating in the forward direction. This helps to improve the airflow circulation efficiency, thereby improving the thermal management efficiency.

[0053] In some embodiments, at least two sides of the housing are provided with first windows.

[0054] This design allows external airflow to enter the inner cavity through multiple sides of the outer casing, which helps improve the heat exchange efficiency of the thermal management components.

[0055] In some embodiments, a water reservoir is provided on the top of the housing, and the water reservoir is arranged around the second window.

[0056] By placing a water storage tank on the top of the casing and surrounding the second window, the water storage tank can store external water vapor, thereby reducing the impact of water vapor on the fan to a certain extent and improving the fan's service life.

[0057] Secondly, embodiments of this application provide an energy storage system, including a power conversion device and an energy storage device. The power conversion device is used to connect to the energy storage device to perform power conversion on the current input to the energy storage device or output from the energy storage device.

[0058] The energy storage system provided in this application embodiment, by employing the energy storage device mentioned above, can improve the thermal management effect of the energy storage system.

[0059] Thirdly, embodiments of this application provide a charging network, including charging piles, and an energy storage device or energy storage system, wherein the energy storage device is used to provide electrical energy to the charging piles.

[0060] The energy storage device provided in this application embodiment can improve the thermal management effect of the charging network by adopting the energy storage device or energy storage system mentioned above.

[0061] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 Schematic diagram of an energy storage system provided for some embodiments of this application;

[0064] Figure 2 A schematic diagram of a charging network provided for some embodiments of this application;

[0065] Figure 3 Schematic diagram of an energy storage device provided for some embodiments of this application;

[0066] Figure 4 A perspective structural diagram of the thermal management module of an energy storage device provided in some embodiments of this application;

[0067] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0068] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0069] Figure 7A perspective structural diagram of the fan of the energy storage device provided in some embodiments of this application;

[0070] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0071] Figure 9 A front view of the fan of an energy storage device provided in some embodiments of this application.

[0072] The following are the labeling elements in the figure:

[0073] 1000 - Energy storage system; 1100 - Power conversion device; 1200 - Power generation device; 2000 - Charging network; 2100 - Charging pile; 2200 - Connector; 100 - Energy storage device; 10 - Housing; 20 - Energy storage unit; 30 - Thermal management module; 31 - Outer shell; 3101 - Cavity; 3102 - First window; 3103 - Second window; 3104 - Water storage tank; 32 - Fan; 3201 - Fixing groove; 32011 - Tank body; 32012 - First groove; 3202 - First side; 3203 - Second side; 3204-Second groove; 3205-Third window; 32061-First peripheral wall; 32062-Second peripheral wall; 32063-Third peripheral wall; 3207-First end face; 321-Housing; 322-Blade structure; 3221-Fixing part; 3222-Blade; 323-Drive device; 3231-Driver; 3232-Output shaft; 32321-Shaft body; 32322-Protrusion; 33-First protective net; 34-Second protective net; Z-First direction; Y-Second direction; X-Third direction. Detailed Implementation

[0074] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0075] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0076] Unless otherwise specified, all technical features and optional technical features of the embodiments of this application can be combined with each other to form new technical solutions.

[0077] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0078] In the description of the embodiments of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0080] In the description of the embodiments of this application, "multiple" means two or more, and unless otherwise explicitly specified, "two or more" includes two. Correspondingly, "multiple groups" means two or more groups, including two groups.

[0081] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0083] Energy storage devices are used to store electrical energy and are characterized by convenient installation and transportation, high integration, small footprint, and good scalability. Energy storage devices are an important component of the development of distributed energy, smart grids, and the energy internet within the energy storage field. With the rapid development of new energy technologies, energy storage devices have become one of the more important research directions in the new energy field.

[0084] In related technologies, energy storage devices may include energy storage units and thermal management modules. The thermal management module includes a housing, thermal management components housed within the housing, and a fan mounted on the housing. The thermal management components are used to perform thermal management on the energy storage units. The fan provides power to the airflow, enabling heat exchange between the airflow and the thermal management components within the housing, thereby achieving thermal management of the thermal management components and allowing them to effectively manage the thermal performance of the energy storage units.

[0085] In some cases, during the operation of the energy storage device, dust, snow, leaves, and other impurities in the external environment can easily move towards the air inlet of the casing under the power of the fan. These impurities can be drawn into the casing or accumulate at the air inlet, causing blockage. This affects the ventilation capacity of the casing, thus impacting the fan's thermal management effect on the thermal management components and reducing the overall thermal management efficiency of the thermal management module.

[0086] Based on the above considerations, embodiments of this application provide an energy storage device, an energy storage system, and a charging network. When the fan reverses direction, it drives airflow from the second window through the cavity to the first window. This allows the airflow to be blown out of the first window under the power of the fan, enabling impurities accumulated inside the casing at the first window to be expelled by the airflow, thus improving the problem of blockage at the first window and enhancing the ventilation capacity of the casing. Similarly, when the fan rotates forward, the airflow can smoothly flow from the first window through the cavity to the second window for heat exchange with the thermal management components. This improves the fan's thermal management effect on the thermal management components and helps enhance the thermal management effect of the thermal management module on the energy storage unit.

[0087] The energy storage devices 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 devices.

[0088] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0089] In some embodiments, the energy storage device may include one or more battery clusters, each comprising multiple battery devices. Within a battery cluster, the multiple battery devices may be connected in series via a busbar to increase the voltage and capacity of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters may be connected in parallel to increase the capacity of the energy storage device.

[0090] In some embodiments, the battery device may include one or more battery cell assemblies, and the battery cell assembly may include multiple battery cells. In the battery device, multiple battery cell assemblies may be connected in series, parallel, or a combination thereof to improve the voltage and capacity of the energy storage device.

[0091] In some embodiments, the energy storage device may further include a housing in which the battery clusters are housed.

[0092] In some embodiments, an energy storage device may include one or more battery cell assemblies, each comprising multiple battery cells. These battery cell assemblies may be connected in series, parallel, or a combination thereof to improve the voltage and capacity of the energy storage device.

[0093] In some embodiments, the energy storage device may further include a housing, in which individual battery cells do not constitute a battery device and are housed.

[0094] The enclosure can be a shipping container or a cabinet for an energy storage unit.

[0095] In the battery cell assembly, multiple battery cells are connected in series, in parallel, or in a mixed configuration through a busbar component.

[0096] Hybrid connection refers to multiple battery cells that are connected in both series and parallel.

[0097] In some embodiments, in a battery device or energy storage device, multiple battery cell components can be arranged and fixed to form a battery module, and the battery module is an independent module formed by arranging and fixing multiple battery cell components.

[0098] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties. As another example, the ends and sides of the multiple battery cells can be equipped with end plate structures and side plate structures, respectively.

[0099] In some embodiments, in a battery device or energy storage device, multiple battery cell components may not be fixedly formed into a battery module.

[0100] A battery cell is the smallest unit used to store and output electrical energy. A battery cell can be a rechargeable battery, which is a battery cell that can be recharged after being discharged to reactivate its active materials and continue to be used.

[0101] Among them, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0102] Among them, the battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0103] In some embodiments, the energy storage device may further include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0104] In some embodiments, the thermal management module may include a liquid cooling unit that provides coolant to each battery device via piping for regulating the temperature of individual battery cells.

[0105] In some embodiments, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, the main control module can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0106] In some embodiments, the central control module can serve as the battery management unit of the energy storage device, used for monitoring and managing the energy storage device. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device. For example, the central control module can control the charging and discharging current and voltage of the energy storage device. 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.

[0107] In some embodiments, the fire protection module may include a control panel, detectors, alarm devices, etc., for detecting, alarming, or extinguishing fires in the energy storage device.

[0108] In some embodiments, the power distribution module can be used to distribute power to modules in the energy storage device that require electricity.

[0109] The energy storage system involved in the embodiments of this application can be any power system that requires energy storage devices.

[0110] In some embodiments, the energy storage system involved in this application may include an energy storage device and a power converter system (PCS). The power converter is used to connect to the energy storage device to perform power conversion on the current input to the energy storage device or output from the energy storage device.

[0111] Specifically, energy storage systems can be connected to the power grid or microgrid. Alternatively, they can be coupled to power generation devices. Or, they can be connected to electrical appliances.

[0112] In some embodiments, please refer to Figure 1 , Figure 1 This is a schematic diagram of an energy storage system 1000 provided in some embodiments of this application. A power conversion device 1100 is connected between a power generation device 1200 and an energy storage device 100. The power generation device 1200 generates electrical energy, the energy storage device 100 stores electrical energy, and the power conversion device 1100 performs power conversion on the current input to the energy storage device 100 or the current output from the energy storage device 100. The electrical energy generated by the power generation device 1200 can be stored in the energy storage device 100 through the power conversion device 1100, and the electrical energy stored in the energy storage device 100 can also be output to a load or the power grid through the power conversion device 1100. The number of energy storage devices 100 can be one or more.

[0113] As an example, the power generation device 1200 can specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc.

[0114] In some embodiments, please refer to Figure 2 , Figure 2 This is a schematic diagram of a charging network 2000 provided in some embodiments of this application. The charging network 2000 involved in the embodiments of this application may include a charging pile 2100 and an energy storage device 100. The charging pile 2100 is electrically connected to the energy storage device 100, and the energy storage device 100 is used to provide electrical energy to the charging pile 2100.

[0115] The charging pile 2100 and the energy storage device 100 can be electrically connected via a cable, and the energy storage device 100 can provide the stored electrical energy to the charging pile 2100.

[0116] The charging pile 2100 may have one or more connectors 2200, which are used to connect to electrical devices (such as vehicles) so as to provide power to the electrical devices.

[0117] The energy storage device 100 can be located inside the charging pile 2100 (e.g., an integrated energy storage and charging unit) or outside the charging pile 2100.

[0118] Please refer to the following: Figures 3 to 7 ,in, Figure 3 This is a schematic diagram of an energy storage device 100 provided in some embodiments of this application. Figure 4 This is a perspective structural diagram of the thermal management module 30 of the energy storage device 100 provided in some embodiments of this application. Figure 5 for Figure 4 Enlarged view of point A in the middle. Figure 6 for Figure 4 Enlarged view at point B in the middle. Figure 7This is a perspective structural view of the fan 32 of the energy storage device 100 provided in some embodiments of this application. The energy storage device 100 provided in the embodiments of this application includes a housing 10, an energy storage unit 20, and a thermal management module 30. The energy storage unit 20 is disposed inside the housing 10. The thermal management module 30 includes a housing 31, a thermal management component, and a fan 32. The housing 31 is disposed on the housing 10 and has a cavity 3101, a first window 3102, and a second window 3103. The first window 3102 and the second window 3103 are both connected to the cavity 3101. The fan 32 is disposed on the housing 31. At least a portion of the thermal management component is disposed inside the cavity 3101, and the thermal management component is used to perform thermal management on the energy storage unit 20. When the fan 32 rotates forward, the fan 32 drives airflow from the first window 3102 through the cavity 3101 to the second window 3103 for heat exchange between the thermal management component and the airflow. When the fan 32 reverses, the fan 32 is used to drive the airflow from the second window 3103 through the cavity 3101 to the first window 3102.

[0119] The housing 10 is the structure of the energy storage device 100 used to house the energy storage unit 20.

[0120] The energy storage unit 20 can be a single battery cell or a battery device.

[0121] The housing 31, thermal management components, and fan 32 of the thermal management module 30 can constitute a water-cooled unit of the thermal management module 30.

[0122] The outer casing 31 is the housing structure of the thermal management module 30. The outer casing 31 can be located outside or inside the housing 10, and the outer casing 31 can be located on the top, bottom or side of the housing 10.

[0123] Cavity 3101 is the internal space of shell 31, and first window 3102 and second window 3103 are two windows of shell 31. First window 3102 is connected to the external environment of cavity 3101 and shell 31, and second window 3103 is connected to the external environment of cavity 3101 and shell 31.

[0124] Thermal management components refer to components used to assist in the thermal management of the energy storage unit 20. The term "thermal management component" means that it assists in the thermal management of the energy storage unit 20, rather than directly exchanging heat with the energy storage unit 20. The thermal management component also exchanges heat with airflow in the external environment, allowing the airflow to thermally manage the component. These components can be devices such as microchannel heat exchangers, plate heat exchangers, and condensers.

[0125] Fan 32 refers to a device that provides power to drive airflow. Fan 32 can be a mixed-flow fan 32, a centrifugal fan 32, an axial-flow fan 32, etc. For example... Figure 4 , Figure 5 and Figure 7 As shown, the fan 32 can be installed on the second window 3103; the fan 32 can also be installed inside the cavity 3101; or the fan 32 can be installed at the first window 3102.

[0126] Understandably, the fan 32 can rotate clockwise or counterclockwise. Specifically, the clockwise direction of the fan 32 is opposite to the counterclockwise direction. Both the clockwise and counterclockwise directions of the fan 32 are circumferential. As an example, ... Figure 7 As shown, the forward rotation direction of the fan 32 is counterclockwise, and the reverse rotation direction of the fan 32 is clockwise.

[0127] When the fan 32 rotates forward, it drives the airflow from the first window 3102 through the cavity 3101 to the second window 3103. Under the power of the fan 32, the airflow can enter the inner cavity from the first window 3102 and be blown out from the second window 3103. In this way, the airflow flowing in the inner cavity can exchange heat with the thermal management components to achieve thermal management of the components.

[0128] When the fan 32 reverses, the fan 32 drives the airflow from the second window 3103 through the cavity 3101 to the first window 3102, so that under the power of the fan 32, the airflow can enter the inner cavity from the second window 3103 and be blown out from the first window 3102.

[0129] The energy storage device 100 provided in this application embodiment, when the fan 32 reverses, drives airflow from the second window 3103 through the cavity 3101 to the first window 3102. This allows the airflow to be blown out from the first window 3102 under the power of the fan 32, so that impurities accumulated inside the outer casing 31 at the first window 3102 can be blown out by the airflow, thereby improving the problem of blockage in the first window 3102 and enhancing the ventilation capacity of the outer casing 31. Similarly, when the fan 32 rotates forward, the airflow can smoothly flow from the first window 3102 through the cavity 3101 to the second window 3103 for heat exchange with the thermal management components. This improves the thermal management effect of the fan 32 on the thermal management components, and helps improve the thermal management effect of the thermal management module 30 on the energy storage unit 20.

[0130] Therefore, when thermal management of the energy storage unit 20 is required, the fan 32 can be driven to rotate forward so that the thermal management components can continuously exchange heat with the airflow. In this way, the thermal management components can continuously assist in achieving thermal management of the energy storage unit 20.

[0131] When thermal management of the energy storage unit 20 is not required, the fan 32 can be driven to reverse as needed to drive airflow and blow out impurities from the inner cavity of the first window 3102. For example, when thermal management of the energy storage unit 20 is not required, the fan 32 can be driven to reverse for a predetermined time and then stop reversing. Alternatively, the fan 32 can be driven to reverse for a predetermined time at regular intervals.

[0132] It should be further explained that when the fan 32 rotates forward, the fan 32 drives the airflow from the first window 3102 through the cavity 3101 to the second window 3103. Under the power of the fan 32, the airflow can be blown out from the second window 3103, so that the impurities accumulated in the second window 3103 inside the outer casing 31 can be blown out from the second window 3103 by the airflow, thereby improving the problem of the second window 3103 being blocked and improving the ventilation capacity of the outer casing 31.

[0133] In some possible designs, the thermal management module 30 includes a thermal management loop for circulating a thermal management medium. Both the thermal management component and the energy storage unit 20 are disposed on the thermal management loop. During the circulation of the thermal management medium in the thermal management loop, it can alternately flow to the energy storage unit 20 and the thermal management component. When the thermal management medium flows to the energy storage unit 20, it can provide thermal management for the energy storage unit 20. When the thermal management medium flows to the thermal management component, it exchanges heat with the airflow through the thermal management component, allowing the airflow to exchange heat with the thermal management medium through the thermal management component, so that when the thermal management medium flows back to the energy storage unit 20, it can provide thermal management for the energy storage unit 20.

[0134] In some possible designs, the thermal management module 30 may include a thermal management loop and a refrigerant loop. The thermal management loop circulates the thermal management medium, and the refrigerant loop circulates the refrigerant. An energy storage unit 20 is disposed within the thermal management loop, and thermal management components are disposed within the refrigerant loop. Heat exchangers are provided on both the refrigerant loop and the thermal management loop. That is, the thermal management module 30 includes an air conditioning system. During the circulation of the thermal management medium in the thermal management loop, it can alternately flow to the energy storage unit 20 and the heat exchanger. When the thermal management medium flows to the energy storage unit 20, it can provide thermal management for the energy storage unit 20. When the thermal management medium flows to the heat exchanger, it can exchange heat with the refrigerant in the heat exchanger, so that when the thermal management medium flows back to the energy storage unit 20, it can provide thermal management for the energy storage unit 20. During the circulation of the refrigerant in the refrigerant loop, it can alternately flow to the heat exchanger and the thermal management components. When the refrigerant flows to the heat exchanger, it can exchange heat with the thermal management medium through the heat exchanger. When the refrigerant flows to the heat management component, it exchanges heat with the airflow through the heat management component, allowing the airflow to exchange heat with the refrigerant through the heat management component, so that the refrigerant can exchange heat with the heat management medium when it flows back to the heat exchanger.

[0135] The thermal management medium can be used to manage the cooling or heating of the energy storage unit 20. The thermal management medium may include, but is not limited to, coolant.

[0136] In some embodiments, please refer to the following: Figure 4 , Figure 5 and Figure 7 Fan 32 is located on the second window 3103.

[0137] This configuration allows the airflow, powered by the fan 32, to be directed out of the second window 3103 after entering the cavity 3101, thereby improving the directionality of the airflow within the housing 31. This enables the airflow to pass smoothly through the housing 31, facilitating heat exchange with the thermal management components within the cavity, thus improving the thermal management effect of the components.

[0138] In some embodiments, please refer to the following: Figure 4 , Figure 5 and Figure 7 Fan 32 includes axial flow fan 32.

[0139] By configuring the fan 32 as an axial flow fan, a high air volume and air pressure can be maintained even when the fan 32 is in reverse rotation, thus maintaining a high extraction capacity. This improves the removal of impurities, thereby effectively enhancing the ventilation capacity of the casing 31 and improving the thermal management effect of the energy storage device 100.

[0140] In some embodiments, please refer to the following: Figures 4 to 7The fan 32 includes a housing 321, a blade structure 322, and a drive unit 323. The housing 321 is disposed on the outer casing 31, and the housing 321 extends along a first direction Z to form a third window 3205. At least a portion of the blade structure 322 is disposed on the third window 3205. The drive unit 323 is disposed on the housing 321, and the drive unit 323 is used to drive the blade structure 322 to rotate along the first direction Z. Wherein, the first direction Z is the axial direction of the fan 32.

[0141] The housing 321 is the outer shell 31 structure of the fan 32.

[0142] Blade structure 322 is a structure of the fan 32 used to drive airflow when rotating.

[0143] The drive device 323 refers to the driver 3231 used to drive the blade structure 322 to rotate. Specifically, the drive device 323 can drive the blade structure 322 to rotate forward or backward. The drive device 323 can be a motor, a motor and gear combination device, etc., used to output rotational driving force.

[0144] The third window 3205 is a window that runs through the housing 321 along the first direction Z, and is also a through slot.

[0145] At least a portion of the blade structure 322 is disposed on the third window 3205, such that when the blade structure 322 is rotated under the drive of the drive device 323, the blade structure 322 can drive the airflow so that the airflow passes through the third window 3205.

[0146] By adopting the above technical solution, the fan 32 is made into an axial flow fan 32, which helps to improve the air extraction capacity of the fan 32 when it reverses, thereby helping to improve the thermal management effect.

[0147] In some embodiments, such as Figure 4 , Figure 5 and Figure 7 As shown, the housing 321 is mounted on the second window 3103.

[0148] In some embodiments, please refer to the following: Figures 4 to 8 ,in, Figure 8 for Figure 7Enlarged view at point C. The drive device 323 includes a driver 3231 and an output shaft 3232. The output shaft 3232 includes a shaft body 32321 and a protrusion 32322 disposed on the outer peripheral wall of the shaft body 32321. The shaft body 32321 is fixedly connected to the output end of the driver 3231. The blade structure 322 is provided with a fixing groove 3201. The fixing groove 3201 includes a groove body 32011 and a first groove 32012 disposed on the inner peripheral wall of the groove body 32011. The shaft body 32321 is inserted into the groove body 32011 along the first direction Z, and the protrusion 32322 is inserted into the first groove 32012 along the first direction Z.

[0149] The driver 3231 can be a device such as a motor or rotary cylinder used to output rotary driving force.

[0150] Output shaft 3232 refers to the linkage shaft at the output end of driver 3231. Shaft body 32321 is the main body of output shaft 3232, and protrusion 32322 is a structure that protrudes from the outer peripheral wall of shaft body 32321.

[0151] like Figure 8 As shown, the fixing groove 3201 is a through groove that runs through the blade structure 322 along the first direction Z. Alternatively, the fixing groove 3201 can also be a groove provided at one end of the blade structure 322 along the first direction Z.

[0152] The main body 32011 is the main part of the fixed groove 3201, and the first groove 32012 is a groove structure provided on the inner peripheral wall of the main body 32011.

[0153] The shaft 32321 is inserted into the slot body 32011 along the first direction Z, and the protrusion 32322 is inserted into the first groove 32012 along the first direction Z, so that the output shaft 3232 can be circumferentially confined within the fixed groove 3201. In this way, when the driver 3231 is driven, the blade structure 322 can stably rotate circumferentially with the output shaft 3232, reducing the risk of the blade structure 322 being thrown out of the drive device 323. This allows the fan 32 to be suitable for larger air volume and air pressure, which helps to improve the ventilation effect of the fan 32, further improves the problem of the first window 3102 or the second window 3103 being blocked by impurities, and is conducive to improving the thermal management effect.

[0154] In some embodiments, please refer to the following: Figures 4 to 8 The outer peripheral wall of the shaft 32321 is provided with a plurality of protrusions 32322, which are spaced apart circumferentially. The fixing groove 3201 includes a plurality of first grooves 32012, which are arranged around the outer periphery of the groove body 32011, and each protrusion 32322 is inserted into each first groove 32012.

[0155] This configuration can further improve the circumferential limiting effect of the blade structure 322 and the output shaft 3232, thereby helping to improve the suction capacity of the fan 32, further improving the problem of the outer casing 31 being blocked by impurities, and further enhancing the thermal management effect.

[0156] In some embodiments, please refer to the following: Figures 7 to 9 ,in, Figure 9 This is a front view of the fan 32 of the energy storage device 100 provided in some embodiments of this application. The blade structure 322 includes a fixing part 3221 and a plurality of blades 3222. The fixing part 3221 is fixedly connected to the output end of the drive device 323. The plurality of blades 3222 are arranged around the fixing part 3221 at intervals, and each blade 3222 is fixedly connected to the fixing part 3221. In the forward rotation direction of the fan 32, the connection between the blades 3222 and the fixing part 3221 extends inward along the first direction Z. Along the width direction of the blades 3222, the two sides of the blades 3222 are provided with a first side edge 3202 and a second side edge 3203. The first side edge 3202 is located outside the second side edge 3203 along the first direction Z, and the end of the second side edge 3203 away from the fixing part 3221 is bent outward along the first direction Z.

[0157] The fixing part 3221 is the part of the blade structure 322 used for fixed connection with the drive device 323. Specifically, the fixing part 3221 is provided with the aforementioned fixing groove 3201.

[0158] Blade 3222 refers to a structure used to rotate under the drive of fixed part 3221 to drive airflow and achieve a ventilation effect. The width direction of blade 3222 is roughly similar to that of the circumferential direction.

[0159] The first side 3202 and the second side 3203 are the sides at both ends of the blade 3222 along the width direction. Specifically, the first side 3202 and the second side 3203 are respectively provided on both sides of the blade 3222 along the circumferential direction. Among them, on the projection plane perpendicular to the first direction Z, the orthographic projection of the first side wall and the orthographic projection of the second side wall are both curves.

[0160] The outer side along the first direction Z refers to the air outlet side of the fan 32 along the first direction Z when the fan 32 is rotating in the forward direction.

[0161] Understandably, along the forward rotation direction of the fan 32, the first side 3202 and the second side 3203 are distributed sequentially. Along the first direction Z, the blade 3222 extends inward from the first side 3202 to the second side 3203.

[0162] By arranging the connection between the blades 3222 and the fixing part 3221 in the forward rotation direction of the fan 32, extending inward along the first direction Z, and bending the end of the second side 3203 away from the fixing part 3221 outward along the first direction Z, when the fan 32 rotates forward, the end of the blades 3222 near the second side 3203 and away from the fixing part 3221 can effectively blow air, specifically, it can effectively blow air outward along the first direction Z, thereby effectively driving the airflow to achieve a high-efficiency ventilation effect. Furthermore, when the fan 32 rotates in reverse, it can also effectively push the airflow inward along the first direction Z to achieve a better ventilation effect. Therefore, it helps to further improve the removal of impurities from the casing 31, thereby improving the ventilation capacity of the casing 31 and thus improving the thermal management effect.

[0163] In some embodiments, please refer to the following: Figures 7 to 9 In the radial direction of the fan 32, the width of the blades 3222 gradually increases in the direction away from the fixed part 3221.

[0164] Among them, the blade 3222 mainly achieves the wind blowing effect through the end away from the fixed part 3221.

[0165] This configuration helps improve the wind-blowing capacity of the blades 3222 when the fan 32 rotates forward. It also helps improve the ability of the fan 32 to expel airflow when the fan 32 rotates in reverse. Therefore, it helps to further improve the removal of impurities on the casing 31, thereby improving the ventilation capacity of the casing 31 and thus improving the thermal management effect.

[0166] In some embodiments, please refer to the following: Figure 7 and Figure 9 The curvature of the second side 3203 is greater than that of the first side 3202.

[0167] This configuration helps to further enhance the wind-blowing and wind-pushing capabilities of the blades 3222. Therefore, it helps to further improve the removal of impurities from the outer casing 31, thereby improving the ventilation capacity of the outer casing 31 and ultimately enhancing thermal management.

[0168] In some embodiments, please refer to the following: Figure 7 and Figure 9 The end of the first side 3202 away from the fixing part 3221 is provided with a second groove 3204.

[0169] The second groove 3204 is a groove structure formed on the first side 3202.

[0170] By providing the second groove 3204, the airflow can be depressurized during the rotation of the blades 3222, which helps the airflow pass smoothly through the third window 3205, thereby improving the suction capacity of the fan 32. Therefore, it helps to further improve the removal of impurities on the casing 31, thereby improving the ventilation capacity of the casing 31 and thus improving thermal management.

[0171] In some embodiments, please refer to the following: Figure 7 and Figure 9 On the projection plane perpendicular to the first direction Z, the orthographic outline of the third window 3205 is circular.

[0172] The outline of the orthographic projection through the third window 3205 is circular, which helps to improve the smoothness of airflow through the third window 3205. Therefore, it helps to further improve the removal of impurities on the housing 31, thereby improving the ventilation capacity of the housing 31 and thus improving the thermal management effect.

[0173] In some embodiments, please refer to the following: Figure 7 and Figure 9 The inner peripheral wall of the third window 3205 includes a first peripheral wall 32061, a second peripheral wall 32062 and a third peripheral wall 32063. The second peripheral wall 32062 and the third peripheral wall 32063 are located at both ends of the first peripheral wall 32061 along the first direction Z. The housing 321 has a first end face 3207 and a second end face at both ends along the first direction Z. The first end face 3207 and the first peripheral wall 32061 are connected by an arc of the second peripheral wall 32062, and the second end face and the first peripheral wall 32061 are connected by an arc of the third peripheral wall 32063.

[0174] The first peripheral wall 32061, the second peripheral wall 32062, and the third peripheral wall 32063 are three portions of the inner peripheral wall of the third window 3205 distributed along the first direction Z. Understandably, the second peripheral wall 32062, the first peripheral wall 32061, and the third peripheral wall 32063 are distributed sequentially along the first direction Z. Specifically, the first peripheral wall 32061, the second peripheral wall 32062, and the third peripheral wall 32063 are all arranged around the blade structure 322.

[0175] The first end face 3207 and the second end face are the two end faces of the housing 321 along the first direction Z.

[0176] The first end face 3207 and the first peripheral wall 32061 are connected by an arc of the second peripheral wall 32062, and the second end face and the first peripheral wall 32061 are connected by an arc of the third peripheral wall 32063. This allows airflow to pass smoothly through the third window 3205 under the rotation of the blade structure 322, thereby improving the ventilation capacity of the fan 32 (including ventilation capacity during forward and reverse rotation). Therefore, it helps to further improve the removal of impurities on the outer casing 31, thereby improving the ventilation capacity of the outer casing 31 and thus improving thermal management.

[0177] In some embodiments, please refer to the following: Figure 4 and Figure 5 The thermal management module 30 also includes a first protective net 33, which is located on the second window 3103.

[0178] The first protective net 33 has a mesh structure. Understandably, the first protective net 33 is located on the outside of the fan 32.

[0179] The first protective net 33, installed on the second window 3103, serves two purposes: firstly, it blocks some impurities from entering the fan 32 through the second window 3103, thus improving the ventilation capacity of the outer casing 31 and the exhaust capacity of the fan 32; secondly, it prevents personnel from accidentally touching the fan 32, ensuring high reliability.

[0180] In some embodiments, please refer to the following: Figure 4 and Figure 6 The thermal management module 30 also includes a second protective net 34, which is located on the first window 3102.

[0181] The second protective net 34 has a mesh structure. Understandably, the second protective net 34 is located outside the fan 32.

[0182] The second protective net 34, installed on the first window 3102, serves two purposes: firstly, it blocks some impurities from entering the fan 32 through the first window 3102, thus improving the ventilation capacity of the outer casing 31 and the exhaust capacity of the fan 32; secondly, it prevents personnel from accidentally touching the fan 32, ensuring high reliability.

[0183] In some embodiments, a wind pressure sensor is provided at the first window 3102.

[0184] The wind pressure sensor is used to detect the wind pressure at the first window 3102, thereby obtaining the degree of blockage at the first window 3102.

[0185] This setting allows the first window 3102 to be blocked by impurities when the pressure detected by the wind pressure sensor is lower than the preset value. Therefore, the fan 32 needs to be driven to reverse so that the fan 32 can blow away the impurities in the first window 3102 in order to restore a better wind pressure.

[0186] In some embodiments, please refer to the following: Figure 3 and Figure 4 The outer casing 31 is located on the top of the housing 10.

[0187] Understandably, the thermal management module 30 is located on the top of the housing 10.

[0188] This configuration increases the height of the thermal management module 30, which reduces the risk of impurities accumulating in the first window 3102 or the second window 3103, thereby helping to improve the ventilation capacity of the housing 31 and enhance the exhaust effect of the fan 32.

[0189] In some embodiments, please refer to Figure 4 The first window 3102 and the second window 3103 are respectively located on different surfaces of the outer shell 31.

[0190] As an example, the first window 3102 is disposed on the side wall of the housing 31 along the second direction Y, and the second window 3103 is disposed on the side wall of the housing 31 along the first direction Z, wherein the first direction Z is perpendicular to the second direction Y.

[0191] By having the first window 3102 and the second window 3103 respectively disposed on different surfaces of the housing 31, the airflow through the first window 3102, the inner cavity, and the second window 3103 is improved, thus enhancing the ventilation capacity of the housing 31. This also reduces the risk of airflow backflow through the first window 3102 and the second window 3103. Consequently, this helps improve the thermal management effect of the fan 32 on the thermal management components.

[0192] In some embodiments, please refer to the following: Figures 4 to 6 The second window 3103 is located on the top of the outer casing 31.

[0193] Understandably, the first window 3102 is disposed on the side of the housing 31, specifically, the first window 3102 is disposed on the side wall of the housing 31 along the second direction Y. The second window 3103 is disposed on the top of the housing 31.

[0194] It should be noted that when the fan 32 rotates forward, the airflow enters the inner cavity through the second window 3103, mainly for heat dissipation of the thermal management components, and then flows out through the first window 3102.

[0195] This configuration allows the heated airflow in the inner cavity to flow upwards under the influence of its own temperature and the suction effect of the fan 32 when the fan 32 is rotating forward. This helps to improve the airflow circulation efficiency, thereby improving the thermal management efficiency.

[0196] In some embodiments, the first direction Z is the vertical direction.

[0197] In some embodiments, please refer to the following: Figures 4 to 6 The outer casing 31 has a first window 3102 on at least two sides.

[0198] Understandably, such as Figure 4 As shown, the outer casing 31 has a first window 3102 on both sides along the second direction Y. Alternatively, the outer casing 31 has a first window 3102 on at least one side along the second direction Y and at least one side along the third direction X. Wherein, the first direction Z is perpendicular to the second direction Y, the first direction Z is perpendicular to the third direction X, and the second direction Y is perpendicular to the third direction X.

[0199] This configuration allows external airflow to enter the inner cavity through multiple sides of the outer casing 31, which helps to improve the heat exchange efficiency of the thermal management components.

[0200] In some embodiments, please refer to the following: Figure 4 and Figure 5 The top of the outer casing 31 is provided with a water storage tank 3104, which is arranged around the second window 3103.

[0201] The water storage tank 3104 is a recessed structure located on the top of the outer casing 31.

[0202] The water storage tank 3104 is located on the top of the outer casing 31 and surrounds the second window 3103, so that the water storage tank 3104 can store external water vapor, thereby reducing the impact of water vapor on the fan 32 to a certain extent and improving the service life of the fan 32.

[0203] Please see Figure 1 The energy storage system 1000 provided in this application embodiment includes a power conversion device 1100 and an energy storage device 100. The power conversion device 1100 is connected to the energy storage device 100 to perform power conversion on the current input to the energy storage device 100 or output from the energy storage device 100. The energy storage device 100 in this embodiment is the same as the energy storage device 100 in the above embodiments; please refer to the relevant descriptions of the energy storage device 100 in the above embodiments for details, which will not be repeated here.

[0204] The energy storage system 1000 provided in this application embodiment can improve the thermal management effect of the energy storage system 1000 by adopting the energy storage device 100 mentioned above.

[0205] Please see Figure 2 The charging network 2000 provided in this embodiment includes a charging pile 2100 and an energy storage device 100 or an energy storage system 1000. The energy storage device 100 is used to provide electrical energy to the charging pile 2100. The energy storage device 100 and energy storage system 1000 in this embodiment are the same as those in the above embodiments. Please refer to the relevant descriptions of the energy storage device 100 and energy storage system 1000 in the above embodiments for details, which will not be repeated here.

[0206] The energy storage device 100 provided in this application embodiment can improve the thermal management effect of the charging network 2000 by adopting the energy storage device 100 or the energy storage system 1000 mentioned above.

[0207] As one embodiment of this application, such as Figures 3 to 7 As shown, the energy storage device 100 includes a housing 10, an energy storage unit 20, and a thermal management module 30. The energy storage unit 20 is disposed within the housing 10. The thermal management module 30 includes a housing 31, a thermal management component, and a fan 32. The housing 31 is disposed on the top of the housing 10 and has an inner cavity, a first window 3102, and a second window 3103, both of which communicate with the inner cavity. The fan 32 is an axial flow fan and is disposed on the second window 3103. The thermal management component is disposed in the inner cavity and is used for thermal management of the energy storage unit 20. When the fan 32 rotates forward, it drives airflow from the first window 3102 through the cavity 3101 to the second window 3103 for heat exchange between the thermal management component and the airflow. When the fan 32 rotates in reverse, it drives airflow from the second window 3103 through the cavity 3101 to the first window 3102.

[0208] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized by, include: Box; The energy storage unit is located inside the enclosure; A thermal management module includes a housing, a thermal management component, and a fan. The housing is disposed on the box and has a cavity, a first window, and a second window. The first window and the second window are both connected to the cavity. The fan is disposed on the housing. At least a portion of the thermal management component is disposed within the cavity and is used to perform thermal management on the energy storage unit. When the fan rotates forward, it drives airflow from the first window through the cavity to the second window for heat exchange between the thermal management component and the airflow; when the fan rotates in reverse, it drives airflow from the second window through the cavity to the first window.

2. The energy storage device of claim 1, wherein, The fan is located on the second window.

3. The energy storage device of claim 1, wherein, The fan includes an axial flow fan.

4. The energy storage device of claim 3, wherein, The fan includes: A housing is disposed on the outer shell and forms a third window through a first direction; The blade structure is at least partially disposed on the third window; A drive device is mounted on the housing and is used to drive the blade structure to rotate along the first direction; wherein the first direction is the axial direction of the fan.

5. The energy storage device of claim 4, wherein, The driving device includes a driver and an output shaft. The output shaft includes a shaft body and a protrusion disposed on the outer peripheral wall of the shaft body. The shaft body is fixedly connected to the output end of the driver. The blade structure is provided with a fixing groove, the fixing groove includes a groove body and a first groove provided on the inner peripheral wall of the groove body, the shaft is inserted into the groove body along the first direction, and the protrusion is inserted into the first groove along the first direction.

6. The energy storage device of claim 5, wherein, The outer peripheral wall of the shaft is provided with a plurality of protrusions spaced apart along the circumference, and the fixing groove includes a plurality of first grooves arranged around the outer periphery of the groove body, and each of the protrusions is inserted into each of the first grooves.

7. The energy storage device of claim 4, wherein, The blade structure includes a fixing part and multiple blades. The fixing part is fixedly connected to the output end of the drive device, and the multiple blades are arranged at intervals around the fixing part and fixedly connected to the fixing part. In the forward rotation direction of the fan, the connection between the blade and the fixing part extends inward along the first direction; Along the width direction of the blade, the blade has a first side and a second side on both sides. The first side is located outside the second side along the first direction, and the end of the second side away from the fixing part is bent outward along the first direction.

8. The energy storage device according to claim 7, characterized in that, In the radial direction of the fan, the width of the blades gradually increases in the direction away from the fixed part.

9. The energy storage device of claim 7, wherein, The curvature of the second side is greater than that of the first side.

10. The energy storage device of claim 7, wherein, The end of the first side away from the fixing part is provided with a second groove.

11. The energy storage device of claim 4, wherein, On a projection plane perpendicular to the first direction, the orthographic outline of the third window is circular.

12. The energy storage device of claim 4, wherein, The inner peripheral wall of the third window includes a first peripheral wall, a second peripheral wall, and a third peripheral wall. The second peripheral wall and the third peripheral wall are located at both ends of the first peripheral wall along the first direction. The housing has a first end face and a second end face at both ends along the first direction. The first end face and the first peripheral wall are connected by an arc of the second peripheral wall, and the second end face and the first peripheral wall are connected by an arc of the third peripheral wall.

13. The energy storage device of any one of claims 1-12, wherein, The thermal management module also includes a first protective net, which is disposed on the second window.

14. The energy storage device of any one of claims 1-12, wherein, The thermal management module also includes a second protective net, which is disposed on the first window.

15. The energy storage device of any one of claims 1-12, wherein, A wind pressure sensor is installed at the first window.

16. The energy storage device of any one of claims 1-12, wherein, The outer shell is disposed on the top of the box.

17. The energy storage device of any one of claims 1-12, wherein, The first window and the second window are respectively located on different surfaces of the outer casing.

18. The energy storage device of claim 17, wherein, The second window is located at the top of the outer casing.

19. The energy storage device of claim 18, wherein, The first window is provided on at least two sides of the outer casing.

20. The energy storage device of claim 18, wherein, The top of the outer casing is provided with a water storage tank, which is arranged around the second window.

21. An energy storage system characterized by, It includes a power conversion device and an energy storage device according to any one of claims 1-20, wherein the power conversion device is configured to be connected to the energy storage device to perform power conversion on current input to or output from the energy storage device.

22. A charging network characterized in that, It includes a charging pile and an energy storage device according to any one of claims 1-20 or an energy storage system according to claim 21, wherein the energy storage device is used to provide electrical energy to the charging pile.

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