Energy storage device

Abstract

The invention discloses an energy storage device, and the device comprises a cabinet body which comprises a front wall and a rear wall which are arranged at an interval in a first direction, and a first cavity and a second cavity which are arranged in a second direction and communicate with each other; the electrical device is arranged in the first chamber; the plurality of battery modules are arranged in the second cavity, a first air duct is arranged between the plurality of battery modules and the front wall, a second air duct is arranged between the plurality of battery modules and the rear wall, the battery modules are provided with first fans, and the first fans are configured to drive air in the cabinet body to enter from the first air duct, penetrate through the battery modules and flow into the second air duct; the heat exchange part is arranged on the front wall, the heat exchange part is configured to exchange heat between air in the cabinet body and air outside the cabinet body, the heat exchange part comprises an air outlet and an air inlet which are located in the cabinet body, and the air outlet is communicated with the first air duct; the second air channel communicates with the air inlet through the flow guide assembly.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to an energy storage device. Background Technology

[0002] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. The development of energy storage devices requires consideration of multiple design factors, such as heat dissipation performance, cycle life, and cost, as well as the safety performance of the energy storage devices.

[0003] The battery modules and electrical modules in energy storage devices are prone to generating heat during operation, which may affect the safety performance of the energy storage device. Summary of the Invention

[0004] This application provides an energy storage device that helps improve the safety performance of the energy storage device.

[0005] In a first aspect, this application provides an energy storage device, which includes a cabinet, an electrical device, multiple battery modules, a heat exchanger, and a flow guiding assembly. The cabinet includes a front wall and a rear wall spaced apart along a first direction, and the cabinet has a first chamber and a second chamber arranged along a second direction, which are connected. The first direction is perpendicular to the second direction. The electrical device is disposed in the first chamber. Multiple battery modules are disposed in the second chamber. A first air duct is provided between the multiple battery modules and the front wall, and a second air duct is provided between the multiple battery modules and the rear wall. Each battery module is equipped with a first fan, which is configured to drive air inside the cabinet to enter through the first air duct, pass through the battery modules, and flow into the second air duct. The heat exchanger is disposed on the front wall and is configured to exchange heat between the air inside the cabinet and the air outside the cabinet. The heat exchanger includes an air outlet and an air inlet located inside the cabinet, and the air outlet is connected to the first air duct. The flow guiding assembly connects the second air duct and the air inlet. The energy storage device provided in this application has a first chamber and a second chamber that are interconnected. The battery module adopts a fan cooling mode and is equipped with heat exchange components and air guiding components to achieve rapid air circulation in the cabinet and heat exchange between the air inside and outside the cabinet. This meets the heat dissipation requirements of the battery module during high-rate charging and discharging, reduces the risk of damage to the battery module and electrical devices due to high temperature, extends the service life of the energy storage device, and improves the reliability of the energy storage device.

[0006] In one or more of the above optional embodiments, the cabinet includes a top wall and a bottom wall spaced apart along a third direction; a flow guiding assembly is located above multiple battery modules, and the flow guiding assembly includes a flow guiding pipe and a flow guiding shroud, the flow guiding pipe, the rear wall, and the flow guiding shroud being connected to form a flow channel; the flow guiding shroud has a first opening, or the flow guiding shroud and the rear wall are connected to form a first opening, the first opening being arranged along a third direction, and the first opening connecting the second air duct and the flow channel; the flow guiding pipe has a second opening, the second opening connecting the flow channel and the air inlet. The flow guiding pipe can concentrate and guide the hot air accumulated in the second air duct to the heat exchanger, reducing the diffusion or retention of hot air around the battery modules, shortening the heat dissipation path, and improving heat exchange efficiency. The flow guiding assembly is located above multiple battery modules, which can effectively utilize the top space of multiple battery modules and reduce the impact on electrical devices and battery module arrangement.

[0007] In one or more of the above optional embodiments, the flow channel includes a first sub-flow channel and a second sub-flow channel; the guide pipe is provided with the first sub-flow channel, and the guide shroud and the rear wall are connected to form the second sub-flow channel; the guide shroud includes a top, a front part, and two side parts spaced apart along a first direction; the guide pipe is connected to the front part, and the front part includes a third opening, which connects the first sub-flow channel and the second sub-flow channel; the two side parts, the front part, and the rear wall are connected to form the first opening, or the guide shroud includes a bottom part disposed opposite to the top part, and the bottom part is provided with a first opening. Air inside the cabinet flows into the heat exchanger through the second air duct, the guide shroud, and the guide pipe to form a continuous air transmission path, achieving efficient air transmission within the cabinet and making reasonable use of the internal space of the cabinet.

[0008] In one or more of the above optional embodiments, the energy storage device includes a connecting assembly fixed to the inner side of the front wall and located between the front wall and the airflow duct, connecting the airflow duct and the air inlet. The airflow duct is arranged above multiple battery modules and is connected to the heat exchanger through the connecting assembly, optimizing airflow and improving heat dissipation efficiency. Moreover, the connecting assembly is fixed to the front wall, and its compact layout with the airflow duct and heat exchanger improves the space utilization within the cabinet.

[0009] In one or more of the above optional embodiments, the connecting assembly has a fourth opening on the side facing the guide pipe, which connects to the guide pipe. The connecting assembly also has a fifth opening on the side facing the front wall, which connects to the air inlet. On a plane perpendicular to the third direction, the cross-sectional area of ​​the fourth opening is smaller than that of the fifth opening. The connecting assembly adopts a gradually expanding structure from small to large, resulting in a more uniform distribution of air flowing into the heat exchanger from the connecting assembly, thereby improving heat exchange efficiency. Furthermore, because the cross-sectional area of ​​the fourth opening is smaller, the guide pipe can also be designed with a smaller size, helping to reduce the space occupied by the guide pipe.

[0010] In one or more of the above optional embodiments, the energy storage device includes a seal configured to be clamped between the flow channel and the connecting assembly. The seal, clamped between the flow channel and the connecting assembly, improves the sealing performance of the connection between the flow channel and the connecting assembly, reducing air leakage from inside and outside the flow channel assembly. When the energy storage device transitions from an open state to a closed state, the seal provides cushioning, reducing mechanical collisions between the flow channel and the connecting assembly, and extending the service life of the energy storage device.

[0011] In one or more of the above optional embodiments, the energy storage device includes an insulation component disposed between the rear wall and the battery modules, and fixed to the rear wall. The thermal conductivity of the insulation component is less than 0.1 W / (m·K). The insulation component, the rear wall, and the multiple battery modules serve as components of a second air duct. The insulation component is used to insulate the energy storage device, reduce heat exchange between the inside of the cabinet and the external environment, thereby maintaining the stability of the internal temperature of the cabinet.

[0012] In one or more of the above optional embodiments, a sixth opening is provided on the side of the battery module facing the rear wall, the sixth opening connecting the interior of the battery module and the second air duct; a first fan is provided on the side of the battery module facing the front wall, along the first direction, the projection of the sixth opening is separate from the projection of the insulation component, and the projection of the first fan is also separate from the projection of the sixth opening. The separation of the sixth opening from the projection of the insulation component in the first direction reduces the obstruction of the sixth opening by the insulation component, facilitating airflow from the interior of the battery module to the second air duct. The separation of the projection of the first fan from the projection of the sixth opening in the first direction increases the airflow path within the battery module, prolongs the airflow time within the battery module, thereby carrying away more heat to the second air duct, which is beneficial for heat dissipation inside the battery module.

[0013] In one or more of the above optional embodiments, the cabinet includes a first front beam and a first rear beam spaced apart along a first direction. Along a second direction, the first front beam and the first rear beam are located between the battery module and the electrical device, with the battery module fixed to the first front beam. The energy storage device includes an isolator fixed to the first front beam. Along the first direction, the isolator covers at least a portion of the electrical device. Along the opposite direction, a first fan extends beyond the isolator. The first front beam and the first rear beam form a third-dimensional support frame, serving as the main load-bearing components of the energy storage device. Furthermore, the isolator covering at least a portion of the electrical device reduces the direct impact of high-temperature, high-pressure substances on the electrical device, lowering the risk of the electrical device failing due to high temperatures. The first fan extends beyond the isolator. More of the cold air flowing from the heat exchanger is driven into the battery module by the first fan.

[0014] In one or more of the above optional embodiments, the cabinet includes a first side beam, a first front beam, and the first side beams are spaced apart along a second direction, and multiple battery modules are disposed between the first front beam and the first side beam. Each battery module includes a module body, a first fixing part, and a second fixing part. Along the second direction, the first fixing part and the second fixing part are connected to opposite sides of the module body. The first fixing part is fixed to the surface of the first front beam facing the front wall; the second fixing part is fixed to the surface of the first side beam facing the front wall. The battery modules are fixed to the first front beam and the first side beam respectively by the first fixing part and the second fixing part to improve the connection stability of the battery modules. Furthermore, the first fixing part and the second fixing part can act as energy-absorbing components, absorbing impact energy through their own bending deformation when impacted by high-temperature, high-pressure materials or external impacts, reducing damage to the first front beam and the first side beam under impact, thereby improving the overall structural stability of the energy storage device. Additionally, the first fixing part is fixed to the surface of the first front beam facing the front wall. The second fixing part is fixed to the surface of the first side beam facing the front wall, reducing the diffusion of cold air to the surrounding area of ​​the battery module, so that more cold air flows into the battery module and takes away more heat from the inside of the battery module, effectively improving the heat exchange efficiency.

[0015] In one or more of the above optional embodiments, the cabinet includes a second side beam, the first side beam and the second side beam are spaced apart along a first direction, and the first rear beam and the second side beam are spaced apart along a second direction; the energy storage device includes a first support frame and a second support frame spaced apart along the second direction, the first support frame is fixed to the first front beam and the first rear beam, and the second support frame is fixed to the first side beam and the second side beam, and the first support frame and the second support frame are configured to support the battery module. Placing the battery module directly on the first support frame and the second support frame facilitates the installation and replacement of the battery module. The weight of the battery module is distributed to the first side beam, the second side beam, the first front beam, and the first rear beam of the cabinet through the first support frame and the second support frame, reducing the risk of excessive local stress causing deformation or breakage of the first support frame and the second support frame.

[0016] In one or more of the above optional embodiments, multiple battery modules are spaced apart along a third direction, with the gap between two adjacent battery modules being less than or equal to 8 mm. Reducing the gap between battery modules helps to increase the number of battery modules per unit space, and the compact layout facilitates the miniaturization design of energy storage devices, optimizing the space utilization of energy storage devices while increasing energy density.

[0017] In one or more of the above optional embodiments, the heat exchange component includes a heat exchanger, which is fixed to the front wall. The heat exchange component includes a first air inlet and a second air inlet. Air from outside the cabinet enters the heat exchange component through the first air inlet and exits the heat exchange component through the second air inlet, thereby cooling the gap between the air flowing into the air inlet.

[0018] In one or more of the above optional embodiments, the flow guide duct extends along a first direction X to reduce the airflow path within the flow guide duct, thereby improving heat exchange efficiency.

[0019] In one or more of the above optional embodiments, the front portion of the guide pipe protrudes along the second direction. The front portion is larger than the guide pipe, which facilitates airflow. In one or more of the above optional embodiments, the front wall is spaced apart from multiple battery modules along the first direction, and a portion of the connecting assembly is disposed between the multiple battery modules and the front wall. This compact layout with the guide pipe and heat exchange components improves space utilization within the cabinet.

[0020] In one or more of the above optional embodiments, the seal is fixed to the connecting assembly. The seal and the connecting assembly have high connection stability.

[0021] In one or more of the above optional embodiments, the first fixing part is L-shaped. This improves the connection stability between the battery module and the housing and facilitates processing and manufacturing.

[0022] In one or more of the above optional embodiments, the second fixing part is L-shaped. This improves the connection stability between the battery module and the housing and facilitates manufacturing. Attached Figure Description

[0023] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0024] Figure 1 Schematic diagrams of the closed state of the energy storage device provided in some embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a heat exchanger provided in some embodiments of this application;

[0026] Figure 3 Schematic diagrams of the energy storage device in its open state provided in some embodiments of this application;

[0027] Figure 4 A partial structural schematic diagram of the energy storage device in the open state provided in some embodiments of this application;

[0028] Figure 5 This is a partial structural schematic diagram of an energy storage device provided in some embodiments of this application;

[0029] Figure 6 A partial structural schematic diagram of an energy storage device provided in some embodiments of this application from one angle;

[0030] Figure 7A partial structural schematic diagram of an energy storage device provided in some embodiments of this application from another angle;

[0031] Figure 8 A structural schematic diagram of a portion of an energy storage device provided in some embodiments of this application from another angle;

[0032] Figure 9 Schematic diagram of the structure of the flow guiding component of the energy storage device provided in some embodiments of this application;

[0033] Figure 10 Schematic diagram of the flow guiding component of the energy storage device provided in other embodiments of this application;

[0034] Figure 11 Schematic diagram of the structure of the isolation component of the energy storage device provided in some embodiments of this application;

[0035] Figure 12 A structural schematic diagram of a portion of an energy storage device provided in some embodiments of this application from another angle;

[0036] Figure 13 A partial structural schematic diagram of the cabinet and battery module of the energy storage device provided in some embodiments of this application;

[0037] Figure 14 This is a schematic diagram of the structure of the fan and battery module of the energy storage device provided in some embodiments of this application.

[0038] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0039] 1. Energy storage device; 10. Cabinet; 10a. First chamber; 10b. Second chamber; 11. Front wall; 12. Rear wall; 13. Top wall; 14. Bottom wall; 15. First front beam; 16. First rear beam; 17. First side beam; 18. Second side beam; 20. Electrical device; 30. Battery module; 31. Sixth opening; 32. Module body; 33. First fixing part; 34. Second fixing part; 40. First air duct; 50. Second air duct; 60. First fan; 70. Heat exchanger; 70a. First air outlet; 70b. Second air outlet; 71. Air outlet; 72. Air inlet; 80. Air guide assembly Components; 81. Flow guide pipe; 82. Flow guide cover; 821. Side; 822. Top; 823. Front; 8231. Third opening; 83. Flow channel; 831. First sub-flow channel; 832. Second sub-flow channel; 84. First opening; 85. Second opening; 86. Bottom; 90. Connecting assembly; 90a. Front plate; 90b. Rear plate; 90c. Side plate; 91. Fourth opening; 92. Fifth opening; 100. Sealing element; 110. Thermal insulation element; 120. Isolation element; 130. First support frame; 140. Second support frame; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation

[0040] 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 some embodiments of this application, but not all embodiments.

[0041] The terms "first," "second," "third," etc., used in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. 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.

[0042] In this application, the reference to "embodiment" means that a particular 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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-10°, the two directions can be considered parallel.

[0045] The energy storage device of this application is described below with reference to the accompanying drawings.

[0046] Reference Figure 1 , Figure 3 and Figure 13 This application provides an energy storage device 1, which includes a cabinet 10. The cabinet 10 includes a front wall 11 and a rear wall 12 spaced apart along a first direction X. The cabinet 10 has a first chamber 10a and a second chamber 10b arranged along a second direction Y. The first chamber 10a and the second chamber 10b are connected. The first direction X is perpendicular to the second direction Y.

[0047] The cabinet 10 has a closed state and an open state. By controlling the front wall 11, the cabinet 10 can switch between the closed state and the open state.

[0048] Optionally, the second direction Y is parallel to the horizontal direction, the first chamber 10a is located on the left and the second chamber 10b is located on the right.

[0049] In some examples, along the first direction X, the first chamber 10a and the second chamber 10b are located between the front wall 11 and the rear wall 12.

[0050] In some examples, the first chamber 10a is an open space.

[0051] In some examples, the second chamber 10b is an open space.

[0052] In some examples, the structure of the first chamber 10a is the same as that of the second chamber 10b; alternatively, the structure of the first chamber 10a is different from that of the second chamber 10b.

[0053] The energy storage device 1 includes an electrical device 20, which is disposed in the first chamber 10a. Exemplarily, the electrical device 20 includes components such as electrical elements.

[0054] In some embodiments, the front wall 11 and the electrical device 20 have a certain gap in the first direction X.

[0055] In some examples, the energy storage device 1 includes a plurality of electrical devices 20, all of which are disposed in a first chamber 10a. Exemplarily, the plurality of electrical devices 20 are disposed in the first chamber 10a along a third direction Z. Exemplarily, the plurality of electrical devices 20 are disposed in the first chamber 10a along a third direction Z, wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0056] In some embodiments, the electrical device 20 is configured to control the charging and discharging of the battery module 30.

[0057] The energy storage device 1 includes multiple battery modules 30 disposed in a second chamber 10b. A first air duct 40 is provided between the multiple battery modules 30 and the front wall 11. A second air duct 50 is provided between the multiple battery modules 30 and the rear wall 12. Each battery module 30 is equipped with a first fan 60, which is configured to drive air within the housing 10 through the first air duct 40, into the battery module 30, and into the second air duct 50. In some examples, the first fan 60 is located on the side of the battery module 30 facing the front wall 11. The first fan 60 blows air into the battery module 30.

[0058] In other examples, a first fan 60 is located on the side of the battery module 30 facing the rear wall 12. The first fan 60 is an intake fan.

[0059] In some examples, the electrical device 20 is spaced apart from the battery module 30 along the second direction Y.

[0060] In some examples, the battery module 30 includes a housing and battery cells, with the housing having an internal storage space in which the battery cells are housed.

[0061] In some examples, multiple battery modules 30 are disposed in the second chamber 10b along the second direction Y.

[0062] In other examples, multiple battery modules 30 are disposed in the second chamber 10b along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Optionally, the multiple battery modules 30 are stacked along the third direction Z.

[0063] In some examples, multiple battery modules 30 are electrically connected in series, parallel, or a hybrid configuration. A hybrid configuration means that multiple battery modules 30 are connected in both series and parallel configurations.

[0064] In some examples, multiple battery modules 30, front wall 11, and other components within the energy storage device 1 are interconnected to form a first air duct 40.

[0065] In some examples, multiple battery modules 30, rear wall 12, and other components within the energy storage device 1 are interconnected to form a second air duct 50.

[0066] In some examples, along the first direction X, the projection of the first air duct 40 overlaps at least partially with the projection of the second air duct 50.

[0067] In some examples, the energy storage device 1 includes a plurality of first fans 60, which are configured one-to-one with a plurality of battery modules 30.

[0068] like Figure 2 As shown, the energy storage device 1 includes a heat exchanger 70, which is disposed on the front wall 11. The heat exchanger 70 is configured to exchange heat between the air inside the cabinet 10 and the air outside the cabinet 10. The heat exchanger 70 includes an air outlet 71 and an air inlet 72 located inside the cabinet 10. The air outlet 71 is connected to the first air duct 40, and the first direction X is perpendicular to the second direction Y. The air outlet 71 supplies cooled air to the first air duct 40, and hot air from the second air duct 50 flows into the air inlet 72.

[0069] Optionally, the air outlet 71 and the air inlet 72 are arranged along the third direction Z.

[0070] In some examples, the air outlet 71 and the air inlet 72 have the same structure; alternatively, the air outlet 71 and the air inlet 72 have different structures.

[0071] Optionally, the air outlet 71 is rectangular and the air inlet 72 is rectangular.

[0072] In some examples, the heat exchanger 70 includes a heat exchanger fixed to the front wall 11. The heat exchanger 70 includes a first air vent 70a and a second air vent 70b. Air from outside the cabinet 10 enters the heat exchanger 70 through the first air vent 70a and exits through the second air vent 70b, thereby cooling the gap between the air flowing into the air inlet 72. The air flowing into the air inlet 72 and the air entering the heat exchanger 70 through the first air vent 70a are isolated from each other, reducing the amount of air from outside the cabinet 10 entering the cabinet 101. For example, a heat exchange plate (not shown) is provided inside the heat exchanger. The air flowing into the air inlet 72 and the air entering the heat exchanger 70 through the first air vent 70a are located on opposite sides of the heat exchange plate, reducing the temperature of the air flowing into the air inlet 72 through the heat exchange plate.

[0073] The energy storage device 1 includes a flow guiding component 80, which connects the second air duct 50 and the air inlet 72. This connection can be direct or indirect, such as through other flow channels. The flow guiding component 80 connects the second air duct 50 and the air inlet 72, forming an airflow path within the cabinet 10. This guides the air within the cabinet 10 through the second air duct 50 into the heat exchanger 70, thereby dissipating heat from the battery module 30.

[0074] In some examples, at least a portion of the airflow guide component 80 extends along a first direction X, with one end of the airflow guide component 80 extending to a second air duct 50 and the other end extending to an air inlet 72.

[0075] For example, the airflow guide component 80 has two ports, one of which is connected to the second air duct 50 and the other is connected to the air inlet 72.

[0076] In some examples, at least a portion of the flow guiding component 80 is disposed on one side of the plurality of battery modules 30 along the second direction Y.

[0077] In other examples, at least a portion of the flow guiding component 80 is disposed on one side of the plurality of battery modules 30 in a direction opposite to the second direction Y.

[0078] In some other examples, at least a portion of the flow guide component 80 is positioned above the battery module 30.

[0079] In some other examples, at least a portion of the flow guide component 80 is disposed below the battery module 30.

[0080] The energy storage device 1 provided in this application has a first chamber 10a and a second chamber 10b that are interconnected. The battery module 30 adopts a fan cooling mode and is equipped with a heat exchanger 70 and a flow guiding component 80 to achieve rapid air circulation inside the cabinet 10 and heat exchange between the air inside and outside the cabinet 10. This meets the heat dissipation requirements of the battery module 30 during high-rate charging and discharging, reduces the risk of damage to the battery module 30 and electrical device 20 due to high temperature, extends the service life of the energy storage device 1, and improves the reliability of the energy storage device 1.

[0081] Please see Figure 3 and Figure 4 The cabinet 10 includes a top wall 13 and a bottom wall 14 spaced Z along a third direction. A flow guiding assembly 80 is located above the plurality of battery modules 30. The flow guiding assembly 80 includes a flow guiding pipe 81 and a flow guiding cover 82. The flow guiding pipe 81 is connected to the rear wall 12 and the flow guiding cover 82 to form a flow channel 83. The flow guiding pipe 81 has a second opening 85, which connects the flow channel 83 and the air inlet 72.

[0082] Please see Figure 10 The air guide shroud 82 is provided with a first opening 84. The first opening 84 is set along the third direction Z. The first opening 84 connects the second air duct 50 and the flow channel 83.

[0083] Please see Figure 9 , Figure 9 The dashed line is an auxiliary line, representing the rear wall 12. The air guide shroud 82 and the rear wall 12 are connected to form the first opening 84. The first opening 84 is set along the third direction Z. The first opening 84 connects the second air duct 50 and the flow channel 83.

[0084] Optionally, the third direction Z is parallel to the vertical direction, and the top wall 13 is located above the bottom wall 14.

[0085] For example, the direction of gravity is Z for the third party.

[0086] In some examples, along the third direction Z, the first chamber 10a and the second chamber 10b are located between the top wall 13 and the bottom wall 14.

[0087] Multiple battery modules 30 are stacked along the third direction Z, and a flow guiding component 80 is disposed between the battery module 30 and the top wall 13.

[0088] In some examples, the flow guiding assembly 80 includes a flow guiding pipe 81 and a flow guiding shroud 82 disposed along a first direction X, the flow guiding pipe 81 and the flow guiding shroud 82 being connected and communicating the second air duct 50 with the heat exchanger 70.

[0089] In some examples, the flow guide 81 is connected to the flow guide 82, and the connection method includes, but is not limited to, welding, bolting, hinge, snap-fit, adhesive bonding, connection of connecting parts, etc.

[0090] In some examples, the flow channel 81 is integrally formed with the flow shield 82.

[0091] In some examples, the fairing 82 is fixed to the rear wall 12. The fixing methods include, but are not limited to, welding, bolting, snap-fitting, etc.

[0092] Optionally, the flow guide duct 81 extends along the first direction X to reduce the airflow path in the flow guide duct 81, thereby improving heat exchange efficiency.

[0093] In some examples, the cross-section of the flow guide 81 is rectangular, circular, triangular, elliptical, trapezoidal, etc.

[0094] Optionally, the flow guide duct 81 can be straight, wavy, S-shaped, etc.

[0095] The flow guide duct 81 directs the hot air gathered in the second air duct 50 to the heat exchanger 70, reducing the diffusion or stagnation of hot air around the battery module 30, shortening the heat dissipation path, and improving heat exchange efficiency. The flow guide assembly 80 is located above the multiple battery modules 30, which can effectively utilize the top space of the multiple battery modules 30 and reduce the impact on the arrangement of electrical devices 20 and battery modules 30.

[0096] like Figure 5 , Figure 9 and Figure 10 As shown, the flow channel 83 includes a first sub-flow channel 831 and a second sub-flow channel 832. The guide pipe 81 is provided with the first sub-flow channel 831. The guide shroud 82 is connected to the rear wall 12 and forms the second sub-flow channel 832. The second opening 85 connects the air inlet 72 and the first sub-flow channel 831. The first opening 84 connects the second air duct 50 and the second sub-flow channel 832. The guide shroud 82 includes a top 822, a front portion 823, and two side portions 821 spaced apart along a first direction X. The guide pipe 81 is connected to the front portion 823, and the front portion 823 includes a third opening 8231, which connects the first sub-flow channel 831 and the second sub-flow channel 832.

[0097] Please see Figure 9 The two side portions 821, the front portion 823, and the rear wall 12 are connected to form the first opening 84.

[0098] In other examples, please refer to Figure 10 The fairing 82 includes a bottom 86 disposed opposite to the top 822, and the bottom 86 is provided with a first opening 84.

[0099] In some examples, the first sub-channel 831 extends along the first direction X.

[0100] In some examples, the second sub-channel 832 extends along the third direction Z.

[0101] For example, the two sides 821, the top 822, the front 823, and the rear wall 12 are interconnected to form a second sub-flow channel 832. The second sub-flow channel 832 and the second air duct 50 are arranged along the third direction Z. The air guide 82 can effectively utilize the space between the multiple battery modules 30 and the rear wall 12, reducing the additional space occupied by the air guide 82.

[0102] In some examples, the flow channel 81 is fixed to the front part 823, and the fixing method includes, but is not limited to, welding, bolting, hinge, snap-fit, adhesive bonding, connection of connecting parts, etc.

[0103] Please see Figure 9 and 10 Along the second direction Y, the front part 823 protrudes from the guide pipe 81. The front part 823 is larger than the guide pipe 81, which is conducive to guiding the airflow. The air inside the cabinet 10 flows into the heat exchanger 70 through the second air duct 50, the guide shroud 82, and the guide pipe 81 to form a continuous air transmission path, thereby achieving efficient air transmission within the cabinet 10 and making reasonable use of the internal space of the cabinet 10.

[0104] like Figure 6 and Figure 7 As shown, the energy storage device 1 includes a connecting component 90, which is fixed to the inner side of the front wall 11 and located between the front wall 11 and the flow guide pipe 81. The connecting component 90 connects the flow guide pipe 81 and the air inlet 72.

[0105] In some examples, the connection component 90 is located on the side of the heat exchanger 70 facing the flow guide duct 81.

[0106] In some examples, the connecting component 90 extends along a third direction Z.

[0107] In some examples, the connecting component 90 is provided with an airflow channel that extends along a third direction and whose cross-sectional area increases along the third direction Z.

[0108] In some examples, the connecting component 90 is fixed to the front wall 11, and the fixing methods include welding, bolting, hinge, snap-fitting, gluing, connecting parts connection, etc.

[0109] In some examples, along the first direction X, the front wall 11 is spaced apart from a plurality of battery modules 30, and a portion of the connecting assembly 90 is disposed between the plurality of battery modules 30 and the front wall 11.

[0110] In some examples, along the third direction X, the connecting component 90 is flush with the heat exchanger 70.

[0111] The airflow guide pipe 81 is arranged above multiple battery modules 30 and is connected to the heat exchanger 70 through the connecting component 90, which optimizes airflow and improves heat dissipation efficiency. The connecting component 90 is fixed to the front wall 11 and is compactly arranged with the airflow guide pipe 81 and the heat exchanger 70, which improves the space utilization within the cabinet 10.

[0112] like Figures 5 to 8 As shown, the connecting component 90 has a fourth opening 91 on the side facing the guide pipe 81, and the fourth opening 91 is connected to the guide pipe 81. The connecting component 90 has a fifth opening 92 on the side facing the front wall 11, and the fifth opening 92 is connected to the air inlet 72. On the plane perpendicular to the third direction Z, the cross-sectional area of ​​the fourth opening 91 is smaller than the cross-sectional area of ​​the fifth opening 92.

[0113] In some examples, along the third direction Z, the fifth opening 92 is staggered from the fourth opening 91.

[0114] In some examples, the connecting component 90 includes a pipe body that includes an airflow channel whose two ends are connected to a fourth opening 91 and a fifth opening 92.

[0115] For example, the pipeline body includes a front plate 90a and a rear plate 90b spaced apart along a first direction X, a side plate 90c connecting the front plate 90a and the rear plate 90b, and a side plate 90c connecting the front plate 90a and the rear plate 90b. The front plate 90a, the rear plate 90b, and the side plate 90c are connected to form an airflow channel. The front plate 90a has a fourth opening 91 at one end near the guide pipe 81, and the rear plate 90b has a fifth opening 92 at one end near the heat exchanger 70.

[0116] In some examples, the shape of the fourth opening 91 includes, but is not limited to, circles, rectangles, ellipses, and trumpets.

[0117] In some examples, the shape of the fifth opening 92 includes, but is not limited to, circles, rectangles, ellipses, and trumpets.

[0118] Optionally, the cross-sectional area of ​​the fourth opening 91 is less than or equal to half the cross-sectional area of ​​the fifth opening 92.

[0119] In some examples, the opening area of ​​the fifth opening 92 is equal to the opening area of ​​the air inlet 72.

[0120] The connecting component 90 adopts a gradually expanding structure from small to large, which makes the air distribution from the connecting component 90 into the heat exchanger 70 more uniform, thereby improving the heat exchange efficiency. Since the cross-sectional area of ​​the fourth opening 91 is small, the flow guide pipe 81 can also adopt a correspondingly small size design, which helps to reduce the space occupation of the flow guide pipe 81.

[0121] like Figure 5As shown, the energy storage device 1 includes a seal 100 configured to be clamped between the flow channel 81 and the connection assembly 90. In some examples, such as Figure 5 As shown, the seal 100 is fixed to the connecting assembly 90. When the front wall 11 is opened, the seal 100 moves with the front wall 11. Figure 5 As shown, when the front wall 11 is closed, the seal 100 is connected to the flow guide pipe 81, sealingly connecting the connecting assembly 90 and the flow guide pipe 81.

[0122] Alternatively, the seal 100 is fixed to the flow channel 81.

[0123] Optionally, the seal 100 may be a rubber seal or a plastic seal. It has a certain energy absorption function.

[0124] The seal 100 is clamped between the flow guide pipe 81 and the connecting assembly 90, improving the sealing performance of the connection between the flow guide pipe 81 and the connecting assembly 90 and reducing air leakage from inside and outside the flow guide assembly 80. When the front wall 11 changes from an open state to a closed state, the seal 100 has a certain buffering capacity, reducing mechanical collisions between the flow guide pipe 81 and the connecting assembly 90 and extending the service life of the energy storage device 1.

[0125] like Figure 5 and Figure 6 As shown, the energy storage device 1 includes an insulation component 110, which is disposed between the rear wall 12 and the battery modules 30 and fixed to the rear wall 12. The thermal conductivity of the insulation component 110 is less than 0.1 W / (m·K). The insulation component 110, the rear wall 12, and the multiple battery modules 30 serve as components of the second air duct 50.

[0126] In some examples, the insulation element 110, the rear wall 12, and multiple battery modules 30 form a second air duct 50.

[0127] In other examples, the insulation component 110, the rear wall 12, multiple battery modules 30 and other components form a second air duct 50.

[0128] Optionally, the cabinet 10 includes multiple beams that connect the top wall 13 and the bottom wall 14. The insulation component 110, the rear wall 12, multiple battery modules 30, and at least two beams form a second air duct 50.

[0129] In some examples, the insulation component 110 includes one or more of aerogel, ceramic fiber, rubber and plastic and foam.

[0130] In some examples, along the second direction Y, the length of the insulation component 110 is less than the length of the battery module 30. The two ends of the insulation component 110 are spaced apart from the cabinet 10 and form gaps.

[0131] The insulation component 110 is used to insulate the energy storage device 1, reduce the heat exchange between the inside of the cabinet 10 and the external environment, thereby maintaining the stability of the internal temperature of the cabinet 10.

[0132] like Figure 11 and Figure 14 As shown, the battery module 30 has a sixth opening 31 on the side facing the rear wall 12, which connects the interior of the battery module 30 and the second air duct 50. A first fan 60 is located on the side of the battery module 30 facing the front wall 11. Along the first direction X, the projection of the sixth opening 31 is separate from the projection of the insulation member 110, reducing the obstruction of the sixth opening 31 by the insulation member 110 and facilitating airflow from the interior of the battery module 30 to the second air duct 50.

[0133] Along the first direction X, the projection of the first fan 60 is separate from the projection of the sixth opening 31. This increases the airflow path within the battery module 30 and prolongs the airflow time within the battery module 30, thereby carrying away more heat to the second air duct 50, which is beneficial for heat dissipation inside the battery module 30.

[0134] For example, the first fan 60 and the sixth opening 31 are disposed at both ends of the battery module 30 in the second direction Y.

[0135] like Figure 4 , Figure 5 and 11 As shown, the cabinet 10 includes a first front beam 15 and a first rear beam 16 spaced apart along the first direction X. Along the second direction Y, the first front beam 15 and the first rear beam 16 are located between the battery module 30 and the electrical device 20, and the battery module 30 is fixed to the first front beam 15.

[0136] The energy storage device 1 includes an isolator 120 fixed to a first front beam 15, which covers at least a portion of the electrical device 20 along a first direction X. A first fan 60 extends beyond the isolator 120 in a direction opposite to the first direction X.

[0137] In some examples, along the third direction Z, the first front beam 15 is located between the top wall 13 and the bottom wall 14.

[0138] Optionally, along the third direction Z, the first front beam 15 fixes the top wall 13 and the bottom wall 14 together.

[0139] In some examples, along the third direction Z, the first rear beam 16 is located between the top wall 13 and the bottom wall 14.

[0140] Optionally, along the third direction Z, the first rear beam 16 fixes the top wall 13 and the bottom wall 14 together.

[0141] In some examples, the first front beam 15 extends along the third direction Z, and the first front beam 15 is a longitudinal beam.

[0142] In some examples, the first rear beam 16 extends along the third direction Z, and the first rear beam 16 is a longitudinal beam.

[0143] The battery module 30 is fixed to the first front beam 15, and the separator 120 is connected to the first front beam 15. The battery module 30 and the separator 120 are connected to the first front beam 15 together, which is conducive to the stable connection between the battery module 30 and the cabinet 10, as well as the stable connection between the separator 120 and the cabinet 10. It can also reduce the use of beams, thereby saving space and reducing weight.

[0144] In some embodiments, the battery module 30 is fixed to the first front beam 15, and the fixing method includes, but is not limited to, welding, bolting, hinge, snap-fitting, gluing, and connection of connecting parts.

[0145] In some embodiments, the battery module 30 is fixed to the first rear beam 16, and the fixing method includes, but is not limited to, welding, bolting, hinge, snap-fitting, gluing, and connection of connecting parts.

[0146] In some embodiments, the battery module 30 and the separator 120 are connected to different sides of the first front beam 15.

[0147] For example, the battery module 30 is connected to one side of the first front beam 15 along the second direction Y.

[0148] For example, the separator 120 is connected to the first front beam 15 on the side opposite to the second direction Y.

[0149] In some examples, the cabinet 10 also includes a crossbeam connected to the first front beam 15 and the first rear beam 16, and the crossbeam extends along a first direction X.

[0150] The isolator 120 is used for isolation and protection, reducing direct contact between high-temperature and high-pressure materials and electrical devices 20, thereby reducing the risk of damage to electrical devices 20 from high-temperature environments and improving the reliability of energy storage device 1. Moreover, the isolator 120 can conceal a large area of ​​net space.

[0151] In some embodiments, the isolator 120 is generally plate-shaped to cover at least a portion of the electrical device 20.

[0152] The isolator 120 is made of a material with good thermal insulation properties to reduce the transfer of heat to the electrical device 20, thereby improving the safety and reliability of the electrical device 20.

[0153] In some embodiments, the spacer 120 is fixed to the first front beam 15, and the fixing method includes, but is not limited to, screw connection, snap-fit, welding, bonding, and connection of connecting parts.

[0154] In some embodiments, the spacer 120 extends along a first direction X.

[0155] In some embodiments, the isolator 120 includes a main body, a transition portion, and an energy-absorbing portion. The transition portion connects the main body and the energy-absorbing portion. The main body covers at least a portion of the plurality of electrical devices 20. The energy-absorbing portion is fixed to the first front beam 15.

[0156] Optionally, the energy-absorbing part is closer to the front wall 11 than the main body part.

[0157] In some embodiments, the battery module 30 is closer to the front wall 11 than the separator 120. This fully utilizes the space of the cabinet 10 in the first direction X, increasing the energy density of the battery module 30. The closer proximity of the battery module 30 to the front wall 11 compared to the separator 120 facilitates the rapid flow of high-temperature, high-pressure materials to the main body, thereby accelerating their discharge from the cabinet 10.

[0158] The first front beam 15 and the first rear beam 16 form a Z-shaped support frame, serving as the main load-bearing components of the energy storage device. Furthermore, the insulating member 120 covers at least a portion of the electrical device 20, reducing the direct impact of high-temperature, high-pressure substances on the electrical device 20 and lowering the risk of failure due to high temperatures. The first fan 60 extends beyond the insulating member 120. More of the cold air flowing from the heat exchanger 70 is driven by the first fan 60 into the battery module 30.

[0159] like Figure 5 Diagram and Figure 13 As shown, the cabinet 10 includes a first side beam 17, a first front beam 15 and the first side beam 17 are arranged at intervals along the second direction Y, and a plurality of battery modules 30 are disposed between the first front beam 15 and the first side beam 17.

[0160] The battery module 30 includes a module body 32, a first fixing part 33, and a second fixing part 34. Along the second direction Y, the first fixing part 33 and the second fixing part 34 are connected to opposite sides of the module body 32. The first fixing part 33 is fixed to the surface of the first front beam 15 facing the front wall 11. The second fixing part 34 is fixed to the surface of the first side beam 17 facing the front wall 11.

[0161] In some embodiments, the first side beam 17 connects and fixes the top wall 13 and the bottom wall 14.

[0162] In some embodiments, the first fan 60 is disposed on the side of the module body 32 facing the front wall 11.

[0163] Optionally, the first fixing part 33 is detachably connected to the module body 32. The second fixing part 34 is detachably connected to the module body 32.

[0164] For example, the first fixing part 33 includes a first segment and a second segment. The first segment is fixed to the module body 32, and the second segment connects to the first segment and extends toward the first front beam 15. The second segment is fixed to the surface of the first front beam 15 facing the front wall 11.

[0165] Optionally, the first fixing part 33 is L-shaped.

[0166] Optionally, the first fixing part 33 is provided with a first connecting hole, and the energy storage device 1 includes a first screw, which is fixed to the first front beam 15 through the first connecting hole.

[0167] For example, the second fixing part 34 includes a third section and a fourth section. The third section is fixed to the module body 32, and the fourth section connects to the third section and extends to the first side beam 17. The fourth section is fixed to the surface of the first side beam 17 facing the front wall 11.

[0168] Optionally, the second fixing part 34 is L-shaped.

[0169] Optionally, the second fixing part 34 is provided with a second connecting hole, and the energy storage device 1 includes a second screw, which is fixed to the first side beam 17 through the second connecting hole.

[0170] The battery module 30 is fixed to the first front beam 15 and the first side beam 17 by a first fixing part 33 and a second fixing part 34, respectively, to improve the connection stability of the battery module 30. The first fixing part 33 is fixed to the surface of the first front beam 15 facing the front wall 11. The second fixing part 34 is fixed to the surface of the first side beam 17 facing the front wall 11, reducing the diffusion of cold air to the surroundings of the battery module 30, so that more cold air flows into the battery module 30, carrying away more heat from the inside of the battery module 30 and effectively improving the heat exchange efficiency.

[0171] like Figure 5 and Figure 13 As shown, the cabinet 10 includes a second side beam 18, the first side beam 17 and the second side beam 18 are spaced apart along a first direction X, and the first rear beam 16 and the second side beam 18 are spaced apart along a second direction Y. The energy storage device 1 includes a first support frame 130 and a second support frame 140 spaced apart along the second direction Y. The first support frame 130 is fixed to the first front beam 15 and the first rear beam 16, and the second support frame 140 is fixed to the first side beam 17 and the second side beam 18. The first support frame 130 and the second support frame 140 are configured to carry the battery module 30.

[0172] In some embodiments, the second side beam 18 connects and fixes the top wall 13 and the bottom wall 14.

[0173] In some embodiments, a plurality of battery modules 30 are located between a first side beam 17, a second side beam 18, a first front beam 15 and a first rear beam 16.

[0174] In some embodiments, along the second direction Y, the thermal insulation member 110 is spaced between the first rear beam 16 and the second side beam 18.

[0175] Optionally, in the first direction X, the sixth opening 31 corresponds to the gap between the insulation member 110 and the second side beam 18. This reduces the obstruction by the insulation member 110 and the second side beam 18, affecting the airflow from the sixth opening 31.

[0176] In some embodiments, the energy storage device 1 includes a plurality of first support frames 130 and a plurality of second support frames 140, the plurality of first support frames 130 being spaced apart along a third direction Z, and the plurality of second support frames 140 being spaced apart along a third direction Z.

[0177] For example, the first support frame 130 includes a first straight portion and a second straight portion, the first straight portion being fixed to the first front beam 15 and the first rear beam 16. The second straight portion is connected to one end of the first straight portion and extends toward the battery module 30.

[0178] Optionally, the first support frame 130 is L-shaped.

[0179] Alternatively, the first support frame 130 includes a first limiting portion, which is connected to the first straight portion and the second straight portion, and is located at one end of the first straight portion along the first direction X.

[0180] For example, the second support frame 140 includes a third straight portion and a fourth straight portion, the third straight portion being fixed to the first side beam 17 and the second side beam 18. The fourth straight portion is connected to one end of the third straight portion and extends towards the battery module 30.

[0181] Optionally, the second support frame 140 is L-shaped.

[0182] Alternatively, the second support frame 140 includes a second limiting portion connected to the third straight portion and the fourth straight portion, and located at one end of the third straight portion along the first direction X.

[0183] The battery module 30 is placed directly on the first support frame 130 and the second support frame 140, which facilitates the installation and replacement of the battery module 30. The weight of the battery module 30 is distributed to the first side beam 17, the second side beam 18, the first front beam 15, and the first rear beam 16 of the cabinet 10 through the first support frame 130 and the second support frame 140, reducing the risk of deformation or breakage of the first support frame 130 and the second support frame 140 due to excessive local stress.

[0184] like Figure 4 As shown, multiple battery modules 30 are spaced apart along the third direction Z, with the gap between two adjacent battery modules 30 being less than or equal to 8mm. This helps reduce the passage of air through the gaps between the battery modules 30, improving the heat dissipation of the battery modules 30 by the first fan 60.

[0185] In some embodiments, the gap between two adjacent battery modules 30 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, or 3.9mm. 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5.0mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6.0mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7.0mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8.0mm, or any value between any two of these.

[0186] Optionally, the gap between two adjacent battery modules 30 is 2mm to 7mm.

[0187] Alternatively, the gap between two adjacent battery modules 30 is 3mm to 5mm.

[0188] For example, the energy storage device 1 includes a plurality of first support frames 130, which are spaced apart along a third direction Z. The gap between two adjacent first support frames 130 is less than or equal to 8 mm.

[0189] For example, the energy storage device 1 includes a plurality of first support frames 130 and a plurality of second support frames 140. The plurality of first support frames 130 are spaced apart along a third direction Z, and the plurality of second support frames 140 are spaced apart along a third direction Z. The gap between two adjacent second support frames 140 is less than or equal to 8 mm.

[0190] The reduced gap between battery modules 30 is beneficial to increasing the number of battery modules 30 per unit space. Moreover, the compact layout is conducive to the miniaturization design of the energy storage device 1, which improves energy density while optimizing the space utilization of the energy storage device 1.

[0191] 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.

Claims

1. An energy storage device, characterized in that, include: The cabinet includes a front wall and a rear wall spaced apart along a first direction, and the cabinet has a first chamber and a second chamber arranged along a second direction, the first chamber and the second chamber being connected, and the first direction being perpendicular to the second direction; Electrical equipment is installed in the first chamber; Multiple battery modules are disposed in the second chamber. A first air duct is provided between the multiple battery modules and the front wall, and a second air duct is provided between the multiple battery modules and the rear wall. Each battery module is equipped with a first fan, which is configured to drive air inside the cabinet to enter through the first air duct, pass through the battery module, and flow into the second air duct. A heat exchanger is disposed on the front wall and configured to exchange heat between the air inside the cabinet and the air outside the cabinet. The heat exchanger includes an air outlet and an air inlet located inside the cabinet, and the air outlet is connected to the first air duct. A flow guiding component connects the second air duct and the air inlet.

2. The energy storage device according to claim 1, characterized in that, The cabinet includes a top wall and a bottom wall spaced apart along a third direction; The flow guiding component is located above the plurality of battery modules. The flow guiding component includes a flow guiding pipe and a flow guiding cover. The flow guiding pipe, the rear wall, and the flow guiding cover are connected to form a flow channel. The air guide shroud has a first opening, or the air guide shroud and the rear wall are connected to form a first opening. The first opening is arranged in a third direction and connects the second air duct and the flow channel. The flow guide pipe is provided with a second opening, which connects the flow channel and the air inlet.

3. The energy storage device according to claim 2, characterized in that, The flow channel includes a first sub-flow channel and a second sub-flow channel; The flow guide pipe is provided with a first sub-flow channel, and the flow guide cover and the rear wall are connected to form a second sub-flow channel; The fairing includes a top, a front portion, and two side portions spaced apart along a first direction; The flow guide pipe is connected to the front part, and the front part includes a third opening, which connects the first sub-flow channel and the second sub-flow channel. The two sides, the front and the rear walls are connected to form the first opening, or the shroud includes a bottom opposite to the top, and the bottom is provided with the first opening.

4. The energy storage device according to claim 2 or 3, characterized in that, The energy storage device includes a connecting component, which is fixed to the inner side of the front wall and located between the front wall and the flow guide pipe, and the connecting component connects the flow guide pipe and the air inlet.

5. The energy storage device according to claim 4, characterized in that, The energy storage device includes a seal configured to be clamped between the flow channel and the connecting assembly.

6. The energy storage device according to any one of claims 1-5, characterized in that, The energy storage device includes a thermal insulation component, which is disposed between the rear wall and the battery module and fixed to the rear wall. The thermal conductivity of the thermal insulation component is less than 0.1 W / (m·K). The insulation component, the rear wall, and the plurality of battery modules serve as components of the second air duct.

7. The energy storage device according to claim 6, characterized in that, The battery module has a sixth opening on the side facing the rear wall, and the sixth opening connects the interior of the battery module and the second air duct. The first fan is located on the side of the battery module facing the front wall. Along the first direction, the projection of the sixth opening is separate from the projection of the insulation component, and the projection of the first fan is separate from the projection of the sixth opening.

8. The energy storage device according to any one of claims 1-7, characterized in that, The cabinet includes a first front beam and a first rear beam spaced apart along the first direction. Along the second direction, the first front beam and the first rear beam are located between the battery module and the electrical device, and the battery module is fixed to the first front beam. The energy storage device includes an isolator fixed to the first front beam and, along the first direction, covers at least a portion of the electrical device. The first fan extends beyond the isolation member in a direction opposite to the first direction.

9. The energy storage device according to claim 8, characterized in that, The cabinet includes a first side beam, the first front beam and the first side beam are spaced apart along the second direction, and the plurality of battery modules are disposed between the first front beam and the first side beam; The battery module includes a module body, a first fixing part and a second fixing part, and along the second direction, the first fixing part and the second fixing part are connected to opposite sides of the module body; The first fixing part is fixed to the surface of the first front beam facing the front wall, and the second fixing part is fixed to the surface of the first measuring beam facing the front wall.

10. The energy storage device according to any one of claims 1-9, characterized in that, The battery modules are spaced apart along the third direction, and the gap between two adjacent battery modules is less than or equal to 8 mm.

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