energy storage device

Abstract

The application discloses an energy storage device, relates to the technical field of energy storage devices, and aims to solve the problem of reduced heat dissipation efficiency caused by an air layer of an existing top-mounted liquid cooling plate. The energy storage device provided by the application comprises a cabinet body, the cabinet body is provided with a top plate and a bottom plate which are oppositely arranged in the height direction, a plurality of battery packs are arranged in the cabinet body in the height direction, and each battery pack comprises a shell and a liquid cooling plate, the liquid cooling plate is arranged on the side of the shell facing the top plate, and the liquid cooling plate is arranged obliquely relative to the top plate. The application makes the liquid cooling plate obliquely arranged relative to the top plate, guides directional migration of the air layer and makes the air layer gather in the top area of the liquid cooling plate close to the top plate, thereby reducing the obstruction of the air layer to the heat conduction path, increasing the effective heat conduction area of the direct contact between the battery cell and the liquid cooling plate, and improving the overall heat dissipation efficiency of the liquid cooling plate.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, and specifically to an energy storage device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the energy density of power battery packs continues to increase, which places more stringent requirements on the heat dissipation performance of the battery packs. In some technologies, a liquid cooling plate is usually installed on the top of the battery pack to dissipate heat. Through the circulation of coolant inside the liquid cooling plate, the heat generated by the cells in the battery pack during operation is quickly dissipated from the top of the battery pack, so that the battery pack is kept within a suitable operating temperature range.

[0003] However, during the charging and discharging process, the evaporation of the electrolyte will form a stable air layer on the top of the cell. The presence of the air layer will cause a significant decrease in the interfacial thermal conductivity between the cell and the liquid cooling plate, which will directly affect the heat dissipation efficiency of the liquid cooling plate. Utility Model Content

[0004] This application provides an energy storage device that can solve the problem of reduced heat dissipation efficiency caused by air layer in existing top-mounted liquid cooling plates.

[0005] To achieve the above objectives, the energy storage device provided in this application includes: The cabinet has a top panel and a bottom panel that are positioned opposite each other in the vertical direction; Multiple battery packs are stacked in the cabinet along the height direction, and each battery pack includes a shell and a liquid cooling plate, with the liquid cooling plate located on the side of the shell facing the top plate; The liquid cooling plate is inclined relative to the top plate.

[0006] In some embodiments of this application, the housing and liquid cooling plate in each battery pack are tilted in the same direction.

[0007] In some embodiments of this application, the cabinet has a width direction, and the width direction and the height direction intersect; the energy storage device further includes: Multiple sets of support components are spaced apart along the height direction and fixedly installed on the cabinet. Each set of support components includes a first support member and a second support member that are arranged opposite each other in the width direction. In the same set of support components, the first support member and the second support member are staggered in the height direction, and both are fixedly connected to the housing of the corresponding battery pack.

[0008] In some embodiments of this application, the cabinet has a width direction, and the width direction and the height direction intersect; the energy storage device further includes: Multiple sets of adjustable support components are spaced apart along the height direction. Each set of adjustable support components includes a first rotating support and a second rotating support that are arranged opposite each other in the width direction. In the same set of adjustable support components, the first rotating support and / or the second rotating support are rotatably mounted inside the cabinet; a set of battery packs are placed on the first and second rotating supports of the set of adjustable support components.

[0009] In some embodiments of this application, the cabinet has a width direction and a length direction, and the length direction, width direction and height direction intersect each other; each set of adjustable support components includes a first rotating support extending along the length direction, and two first adjusting members spaced apart along the length direction, one of the first adjusting members being connected to one end of the first rotating support member, and the other first adjusting member being connected to the other end of the first rotating support member.

[0010] In some embodiments of this application, the cabinet includes two first support columns, both of which extend along the height direction and are spaced apart in the length direction; the first adjustment member in each set of adjustable support components can be movably mounted on the corresponding first support column.

[0011] In some embodiments of this application, the first rotating support includes a first main body and two first connecting posts respectively connected to both ends of the first main body, the first main body being used to support the corresponding battery pack; Each first adjusting member is provided with a first connecting hole extending along the length direction. Two first connecting posts extend into the first connecting holes of two first adjusting members in the same set of adjustable support assemblies to realize the connection between the first rotating support member and the first adjusting member.

[0012] In some embodiments of this application, the first adjusting member includes a first mating hole, and a first support post passes through the first mating hole so that the first adjusting member can move on the first support post.

[0013] In some embodiments of this application, each adjustable support assembly includes a first adjusting member and a second adjusting member disposed opposite to each other in the width direction. The first adjusting member is used to drive the first rotating support member to rotate, and the second adjusting member is used to drive the second rotating support member to rotate. Energy storage devices also include: The control module is electrically connected to the first and / or second adjustment members in each set of adjustable support components to control the angle change of the corresponding first rotating support member through the first and / or second adjustment members.

[0014] In some embodiments of this application, the top plate is arranged perpendicular to the height direction, and there is an inclined angle α between the liquid cooling plate and the top plate, wherein the inclined angle α is greater than 0° and less than or equal to 10°.

[0015] The above-mentioned technical solution of this application has at least the following beneficial effects: In this technical solution, the liquid cooling plate is tilted relative to the top plate, which effectively disrupts the uniform distribution of the air layer. Under the combined effects of gravity and air pressure difference, the air layer will migrate directionally and accumulate in the top area of ​​the liquid cooling plate near the top plate. In other words, this design guides the air layer, which might otherwise uniformly cover the entire top surface of the battery cell, to a local corner (the top area of ​​the liquid cooling plate). This helps reduce the obstruction of the heat conduction path by the air layer, thereby increasing the effective heat conduction area in direct contact between the battery cell and the liquid cooling plate, and improving the overall heat dissipation efficiency of the liquid cooling plate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0017] Figure 1 This is one of the structural schematic diagrams of an energy storage device in the embodiments of this application; Figure 2 This is a second schematic diagram of the structure of an energy storage device in the embodiments of this application; Figure 3 This is one of the structural schematic diagrams of another energy storage device in the embodiments of this application; Figure 4 This is a second schematic diagram of the structure of another energy storage device in the embodiments of this application; Figure 5 This is a perspective view of yet another energy storage device in the embodiments of this application; Figure 6 This is a perspective view of an adjustable support component in another energy storage device according to an embodiment of this application; Figure 7 This is a front view of an adjustable support component in another energy storage device according to an embodiment of this application; Figure 8 This is a structural schematic diagram of an adjustable support component in one state in another energy storage device according to an embodiment of this application; Figure 9 This is a schematic diagram of the adjustable support component in another energy storage device in another state according to an embodiment of this application; Figure 10 yes Figure 6 Enlarged view of part A in the image; Figure 11 This is a perspective view of the first rotating support member in another energy storage device according to an embodiment of this application; Figure 12 This is a cross-sectional view of the battery pack in the energy storage device in the embodiments of this application.

[0018] Explanation of reference numerals in the attached figures: 1-Cabinet body; 11-Top plate; 12-Bottom plate; 13-Side plate; 14-First support column; 15-Second support column; 2-Battery pack; 21-Housing shell; 211-First end; 212-Second end; 22-Liquid cooling plate; 23-Battery cell; 3-Support assembly; 31-First support member; 32-Second support member; 4-Adjustable support assembly; 41-First rotating support member; 411-First main body; 4111-First plate; 4112-Second plate; 412-First connecting column; 42-Second rotating support member; 43-First adjusting member; 431-First connecting hole; 432-First mating hole; 44-Second adjusting member; 45-First driving member; 46-Second driving member; 5-Control module; Z-Height direction; X-Width direction; Y-Length direction. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "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 accompanying 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.

[0021] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] This application provides an energy storage device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0024] With the rapid development of the new energy vehicle industry, the energy density of power battery packs continues to increase, which places more stringent requirements on the heat dissipation performance of the battery packs. In this technology, a liquid cooling plate is usually installed on the top of the battery pack to dissipate heat. Through the circulation of coolant inside the liquid cooling plate, the heat generated by the cells in the battery pack during operation is quickly dissipated from the top of the battery pack, so that the battery pack is kept within a suitable operating temperature range.

[0025] However, during the charging and discharging process, the evaporation of the electrolyte forms a stable air layer on top of the cell. The presence of this air layer significantly reduces the interfacial thermal conductivity between the cell and the liquid cooling plate, thus directly affecting the heat dissipation efficiency of the liquid cooling plate. Furthermore, if this air layer uniformly covers the entire top surface of the cell, it will greatly increase the thermal resistance of the cell along its heat dissipation path, resulting in a significant decrease in the heat dissipation efficiency of the top-mounted liquid cooling plate.

[0026] Therefore, this application provides a novel energy storage device, which includes a cabinet and multiple battery packs. The cabinet has a top plate and a bottom plate arranged opposite each other in the height direction. The multiple battery packs are stacked in the cabinet along the height direction, and each battery pack includes a shell and a liquid cooling plate, with the liquid cooling plate disposed on the side of the shell facing the top plate. The liquid cooling plate is inclined relative to the top plate.

[0027] In this technical solution, the liquid cooling plate is tilted relative to the top plate, which effectively disrupts the uniform distribution of the air layer. Under the combined effects of gravity and air pressure difference, the air layer will migrate directionally and accumulate in the top area of ​​the liquid cooling plate closer to the top plate. In other words, this design guides the air layer, which might have uniformly covered the entire top surface of the battery cell, to a local corner (the top area of ​​the liquid cooling plate). Thus, there will be no air layer on the other side of the battery cell's top surface, which helps reduce the obstruction of the heat conduction path by the air layer. This increases the effective heat conduction area in direct contact between the battery cell and the liquid cooling plate, and improves the overall heat dissipation efficiency of the liquid cooling plate.

[0028] The following section aims to more clearly describe the energy storage device provided in this application. For example... Figure 1 and Figure 2 As shown, assume that the energy storage device has intersecting height direction Z, width direction X, and length direction Y.

[0029] The energy storage device includes a cabinet 1 and multiple battery packs 2 disposed within the cabinet 1. The cabinet 1 has a top plate 11 and a bottom plate 12 arranged opposite each other in the height direction Z. It is understood that the cabinet 1 also includes a side plate 13 connecting the top plate 11 and the bottom plate 12, and the three together enclose an installation space, the boundaries of which in the height direction Z are defined by the top plate 11 and the bottom plate 12 respectively. The bottom plate 12 is located at the lowest point of the cabinet 1 in the height direction Z, and as the basic load-bearing component of the cabinet 1, it is typically in direct contact with the mounting surface (such as the ground, a support frame, or the bottom of a container). The top plate 11 and the bottom plate 12 are typically arranged horizontally perpendicular to the height direction Z.

[0030] Multiple battery packs 2 are stacked along the height direction Z within the cabinet 1, and each battery pack 2 includes a housing 21 and a liquid cooling plate 22. The liquid cooling plate 22 is located on the side of the housing 21 facing the top plate 11. The liquid cooling plate 22 is inclined relative to the top plate 11 (or the bottom plate 12, or a horizontal plane perpendicular to the height direction Z). Alternatively, the angle between the liquid cooling plate 22 and the height direction Z can be understood as greater than 0° and less than 90°. Or, the liquid cooling plate 22 intersects the horizontal plane. It can be understood that the liquid cooling plate 22 is inclined relative to the top plate 11, meaning that when a battery pack 2 is placed inside the cabinet 1, it is inclined relative to the top plate 11.

[0031] In this technical solution, the liquid cooling plate 22 is inclined relative to the top plate 11, which effectively disrupts the uniform distribution of the air layer. Under the combined effects of gravity and air pressure difference, the air layer will migrate directionally and accumulate in the top area of ​​the liquid cooling plate 22 closer to the top plate 11. In other words, this design makes it possible for the air layer, which could originally be uniformly covered across the entire cell 23 (see reference numerals), to become more concentrated. Figure 12The air layer on the top surface is guided to a local corner (the top area of ​​the liquid cooling plate 22), which helps to reduce the obstruction of the heat conduction path by the air layer, thereby increasing the effective heat conduction area of ​​the cell 23 in direct contact with the liquid cooling plate 22 and improving the overall heat dissipation efficiency of the liquid cooling plate 22.

[0032] In some embodiments, the housing 21 and liquid cooling plate 22 in each battery pack 2 are inclined relative to the top plate 11, and the inclination directions of the housing 21 and liquid cooling plate 22 are the same. The housing 21 and liquid cooling plate 22 can be manufactured entirely according to conventional planar structural designs (i.e., initially as horizontal flat plates), without the need for custom-made molds for the inclination angle or adjustments to stamping, injection molding, or other process parameters. This significantly reduces mold development costs and production line modification requirements, shortening the product development cycle. When the battery pack 2 is installed into the cabinet 1, the inclination of the housing 21 and liquid cooling plate 22 relative to the top plate 11 can be achieved through simple mechanical adjustments, significantly shortening the installation time.

[0033] The synchronous tilting of the housing 21 and the liquid cooling plate 22 creates a continuous "tilted channel," allowing the air layer to flow rapidly along the surface of the liquid cooling plate 22 to the top, preventing the air layer from covering the top of the battery cell 23 and forming a heat insulation layer or thermal resistance. It should be noted that the tilting directions of the multiple battery packs 2 are the same; the housing 21 and liquid cooling plate 22 in each battery pack 2 are tilted relative to the top plate 11, and the tilting directions of the housing 21 and liquid cooling plate 22 in each battery pack 2 are also the same.

[0034] Please refer to Figure 1 and Figure 2 In this embodiment, the energy storage device further includes multiple sets of support components 3, which are spaced apart along the height direction Z and fixedly mounted on the cabinet 1. Each set of support components 3 includes a first support member 31 and a second support member 32 arranged opposite each other in the width direction X. In the same set of support components 3, the first support member 31 and the second support member 32 are staggered in the height direction Z and are both fixedly connected to the shell 21 of the corresponding battery pack 2. In other words, by staggering the first support member 31 and the second support member 32 in the height direction Z (e.g., in a set of support components 3, the installation position of the first support member 31 is relatively low and the installation position of the second support member 32 is relatively high), the battery pack 2 can be directly tilted at a preset angle. This avoids the cost and complexity of adding additional tilting structural components, while precisely controlling the tilt angle of the battery pack 2 to ensure that the air layer gathers towards the top of the battery pack 2.

[0035] Meanwhile, multiple sets of support components 3 can distribute the weight of different battery packs 2 and external vibration loads to multiple height positions of the cabinet 1 (rather than concentrating them at a single support point), avoiding deformation of the cabinet 1 or fatigue damage to the connecting parts caused by local stress concentration. The first support component 31 and the second support component 32 can adopt the same standardized structure (such as an L-shaped bracket or channel steel), requiring only adjustment of the installation position to meet misalignment requirements, eliminating the need to customize special parts for each set of support components 3, thus reducing mold development and production costs. Furthermore, the connection between the first support component 31 and the second support component 32 and the battery pack 2 and / or the cabinet 1 can be achieved through welding, bolt fixing, or snap-fit ​​installation, requiring no complex debugging during assembly and suitable for large-scale automated production.

[0036] For example, such as Figure 5 As shown, each housing 21 has a first end 211 and a second end 212 disposed opposite each other in the width direction X. The mounting position of the second support member 32 in each support assembly 3 is higher than the mounting position of the first support member 31. Specifically, the first end 211 of the housing 21 in each battery pack 2 is connected to the first support member 31, and the second end 212 of the housing 21 is connected to the second support member 32, so that the second end 212 is higher than the first end 211. Under the combined action of gravity and air pressure difference, the air layer accumulates towards the second end 212, forming a localized high-concentration area, preventing the air layer from uniformly covering the battery cell 23 (see reference numerals). Figure 10 The top surface of the battery pack 2 is tilted to reduce ineffective heat conduction areas. In other words, in this embodiment, the battery pack 2 is tilted and fixed inside the cabinet 1, and its tilt angle is not adjustable after installation.

[0037] In some embodiments, the tilt angle and tilt direction of the battery pack 2 can be adjusted; please refer to... Figure 3 and Figure 4 In this embodiment, the energy storage device further includes multiple sets of adjustable support components 4. Each set of adjustable support components 4 includes a first rotating support 41 and a second rotating support 42 arranged opposite each other in the width direction X. In the same set of adjustable support components 4, the first rotating support 41 and / or the second rotating support 42 are rotatably disposed inside the cabinet 1. A battery pack 2 is placed on the first rotating support 41 and the second rotating support 42 of the set of adjustable support components 4. Thus, by adjusting the rotation angle of the first rotating support 41 and the second rotating support 42, the tilt angle and tilt direction of the battery pack 2 can be adjusted. At the same time, the air layer and condensate path can be optimized by adjusting the tilt angle, ensuring that the heat dissipation effect of the battery pack 2 is always at its best, and improving system compatibility. Furthermore, no customized tilting structure is required at the installation site; the tilt angle can be adjusted simply by changing the position of the battery pack 2 by changing the rotation angle of the first rotating support 41 and the second rotating support 42.

[0038] For example, such as Figure 3 As shown, when the first rotating support 41 on the left rotates counterclockwise upwards, the battery pack 2 placed on the first rotating support 41 is lifted, forming a tilted state with the left side higher than the right. At this time, the air layer on the top layer of the battery pack 2 exhibits a distribution characteristic of being thicker on the left and thinner on the right. Because the left area is higher than the right area, hot air will accumulate in the left area, hindering effective heat conduction between the left-side battery cell 23 and the liquid cooling plate 22, resulting in a decrease in the heat dissipation performance of the battery cell 23 on that side. In contrast, the right-side battery cell 23 has a thinner air layer, allowing for unobstructed heat dissipation and normal heat dissipation. If the battery pack 2 maintains the tilted state with the left side higher than the right for a long time, the left-side battery cell 23 will continuously be in a high-temperature environment with poor heat dissipation, which may eventually lead to performance degradation. It is equivalent to sacrificing the function of the battery cell 23 on that side to maintain the operation of the overall system.

[0039] Therefore, in order to balance the overall lifespan and performance of the cells 23 within the battery pack 2, the second rotating support 42 located on the right side can be adjusted, such as... Figure 4 As shown, when the second rotating support 42 on the right rotates clockwise upwards, the battery pack 2 placed on the second rotating support 42 will be lifted to form an inclined state with the left side lower than the right side. At this time, the air layer on the top layer of the battery pack 2 has a distribution characteristic of being thinner on the left and thicker on the right. Because the right side is higher than the left side, hot air will accumulate in the right side to improve the heat dissipation efficiency between the left-side battery cell 23 and the liquid cooling plate 22.

[0040] In other words, by periodically adjusting the tilt direction of the battery pack 2 (such as switching the left and right tilt states periodically), the battery cells 23 of the battery pack 2 can be prevented from always being in the heat dissipation advantage zone or the heat dissipation disadvantage zone, thereby balancing the overall thermal stress distribution of the battery pack 2, extending the service life of the battery pack 2, and preventing premature failure of some battery cells 23.

[0041] Based on the above embodiments, in order to install the first rotating support 41 and the first adjusting member 43, as well as the second rotating support 42 and the second adjusting member 44, the cabinet 1 includes a first support column 14 and a second support column 15 arranged opposite each other in the width direction X. The first adjusting member 43 is disposed on the first support column 14, and the second adjusting member 44 is disposed on the second support column 15.

[0042] Please refer to Figure 5 and Figure 6In this embodiment, the first rotating support member 41 extends along the length direction Y. Each adjustable support assembly 4 includes two first adjusting members 43 spaced apart along the length direction Y. One first adjusting member 43 is connected to one end of the first rotating support member 41, and the other first adjusting member 43 is connected to the other end of the first rotating support member 41. Specifically, the first rotating support member 41 extends along the length direction Y, and its two ends are respectively adjusted by a first adjusting member 43. When adjusting the tilt angle of the battery pack 2, the two first adjusting members 43 simultaneously apply a driving force (such as rotational torque or linear thrust), distributing the weight of the battery pack 2 and the external vibration load to the support points at both ends of the first rotating support member 41. This reduces the stress intensity of a single adjusting member, avoids fatigue, deformation, or damage to the connecting parts caused by local stress concentration, and improves the load-bearing capacity of the overall structure. Exemplarily, the first rotating support member 41 is supported at the first end 211 of the housing 21, and the second rotating support member 42 is supported at the second end 212 of the housing 21.

[0043] In practical use, the two first adjustment components 43 are spaced apart along the length direction Y (such as symmetrically distributed at both ends of the first rotating support component 41). Their installation position and connection structure can adopt a unified design. During on-site installation, it is only necessary to fix the first adjustment component 43 in the preset position of the cabinet 1 and accurately connect it with both ends of the first rotating support component 41 to complete the assembly, which helps to shorten the assembly time and improve the installation efficiency.

[0044] Similarly, the second rotating support member 42 extends along the length direction Y. Each set of adjustable support components 4 includes two second adjusting members 44 spaced apart along the length direction Y. One second adjusting member 44 is connected to one end of the second rotating support member 42, and the other second adjusting member 44 is connected to the other end of the second rotating support member 42. This has the same technical effect as one first adjusting member 43 being connected to one end of the first rotating support member 41, and the other first adjusting member 43 being connected to the other end of the first rotating support member 41, which will not be described in detail here.

[0045] Please combine Figures 5 to 7 In this embodiment, the cabinet 1 includes two first support columns 14, both extending along the height direction Z and spaced apart along the length direction Y. Each adjustable support assembly 4 has a first adjusting member 43 movably mounted on its corresponding first support column 14. The first support column 14, extending along the height direction Z, provides a rigid vertical support track for the first adjusting member 43. Through the rigid constraint of the first support column 14, the adjusting force is evenly transmitted to the first rotating support member 41 via the first adjusting member 43, reducing vibration interference during the adjustment process and ensuring the smoothness and accuracy of the tilt angle adjustment.

[0046] In manual adjustment mode, the first adjusting component 43 is typically equipped with simple operating parts such as an adjusting knob, a threaded rod, or a scale. The operator can directly change the position of the first adjusting component 43 in the height direction Z by rotating the knob or manually turning the threaded rod. In motor control mode, the first adjusting component 43 is driven by a power source such as a servo motor, stepper motor, or hydraulic motor. The control module 5 (such as a PLC) can accurately calculate the target height position based on the real-time collected temperature of the battery cell 23 and send commands to the motor to achieve high-precision displacement adjustment of the first adjusting component 43 in the height direction Z.

[0047] Similarly, the cabinet 1 includes two second support columns 15, both extending along the height direction Z and spaced apart along the length direction Y. The two second support columns 15 are positioned opposite the two first support columns 14 in the width direction X, and are respectively located on both sides of the battery pack 2 in the width direction X. The second adjusting member 44 in each adjustable support assembly 4 is movably mounted on the corresponding second support column 15, achieving the same technical effect as the first adjusting member 43 in each adjustable support assembly 4 being movably mounted on the corresponding first support column 14; this will not be elaborated further in this application.

[0048] like Figure 8 and Figure 9 As shown, in this embodiment, each first adjusting member 43 is connected to a first driving member 45, and each second adjusting member 44 is connected to a second driving member 46. The first driving member 45 and the second driving member 46 can independently control the movement of each first adjusting member 43 and each second adjusting member 44, thereby precisely adjusting the positions of the first rotating support member 41 and the second rotating support member 42. Figure 8 and Figure 9 The path shown by the dashed line is the electrical transmission path between the first drive unit 45, the second drive unit 46, and the control module 5.

[0049] In other embodiments, at least a plurality of first adjustment members 43 located on the same first support column 14 are connected to the first drive member 45 through a linkage mechanism (such as a timing belt or a connecting rod) to ensure that the displacement of all the first adjustment members 43 in the height direction Z is consistent, so as to achieve synchronous adjustment of the plurality of battery packs 2.

[0050] Please refer to Figure 6 and Figure 10The structure of the first rotating support 41 is described in detail below. The first rotating support 41 includes a first main body 411 and two first connecting posts 412 connected to both ends of the first main body 411. The first main body 411 supports the corresponding battery pack 2. Each first adjusting member 43 is provided with a first connecting hole 431 extending along the length direction Y. The two first connecting posts 412 extend into the first connecting holes 431 of the two first adjusting members 43 in the same set of adjustable support components 4, thereby connecting the first rotating support 41 with the first adjusting members 43. By adopting the above method, the first main body 411 directly bears the weight of the battery pack 2, and the two first connecting posts 412 at both ends extend into the first connecting holes 431 of the two first adjusting members 43, forming a symmetrical support structure. This allows the weight of the battery pack 2 to be evenly distributed to the two first adjusting members 43, which is beneficial to improving the overall load-bearing capacity and structural rigidity of the first rotating support 41.

[0051] Specifically, the two first connecting posts 412 extend into the first connecting holes 431 of the two first adjusting members 43 in the same set of adjustable support components 4, and there is a gap between them and the corresponding first connecting holes 431. The gap design allows the first connecting posts 412 to rotate around their axes at a certain angle when the first adjusting member 43 moves along the height direction Z, ensuring that the first connecting posts 412 and the first adjusting member 43 always maintain effective contact and avoid jamming caused by rigid connection. In other words, the gap between the first connecting posts 412 and the corresponding first connecting holes 431 allows the first connecting posts 412 to rotate slightly during the up and down movement of the first adjusting member 43, so as to adapt to the tilt posture of the housing 21 in real time and ensure that the air layer gathers towards the upper part.

[0052] For example, such as Figure 10 and Figure 11 As shown, the first main body 411 includes a first plate 4111 and a second plate 4112 connected and substantially perpendicular to each other, both extending along the length direction Y. The first plate 4111 supports the housing 21 from the side facing the bottom plate 12, directly bearing the main weight of the battery pack 2 and the vertical vibration load, preventing the housing 21 from sagging due to its own weight or external impact. The second plate 4112 supports the housing 21 from the side in the width direction X, sharing the lateral force of the housing 21 in the width direction X (such as the collision force during transportation or the lateral stress generated by the expansion of the battery cell 23), preventing the housing 21 from tilting or twisting in the width direction X. The first plate 4111 and the second plate 4112 perpendicularly cross-support to form an L-shaped mechanical structure, which can resist both vertical and lateral loads simultaneously, significantly reducing the overall deformation risk of the housing 21 and improving structural rigidity.

[0053] In some embodiments, the first adjusting member 43 includes a first mating hole 432, and the first support column 14 passes through the first mating hole 432, so that the first adjusting member 43 is movable on the first support column 14. The first support column 14 is typically installed vertically along the height direction Z. The mating hole 432 and the first support column 14 can restrict the displacement of the first adjusting member 43 in the circumferential direction, prevent the adjusting member 43 from rotating on the first support column 14, ensure the displacement accuracy of the first adjusting member 43 in the height direction Z, and thus accurately control the height of the tilt fulcrum of the first rotating support member 41 connected to it, maintaining the stability of the tilt angle of the battery pack 2.

[0054] In one embodiment, for example, the first support column 14 and the first adjusting member 43 are connected by a limiting structure to ensure that they can only move relative to each other along the height direction Z. Specifically, the first adjusting member 43 may be provided with a guide protrusion extending into the mating hole. In another embodiment, for example, the cross-sectional shape of the first support column 14 perpendicular to the height direction Z is non-circular, and the cross-sectional shape of the first mating hole 432 perpendicular to the height direction Z is non-circular, and the same as the cross-sectional shape of the first support column 14 perpendicular to the height direction Z. For example, the cross-sectional shape of the first support column 14 perpendicular to the height direction Z can be square, rectangular, elliptical, hexagonal, D-shaped, semi-circular, or an irregular cross-section with a guide groove. Thus, the irregular cross-section can restrict the circumferential rotation of the first adjusting member 43.

[0055] Based on the above embodiments, in order to lock the first adjusting member 43 onto the first support column 14 after it slides to the target height, a threaded hole can be opened on the first adjusting member 43. The extension direction of the locking hole is perpendicular to the extension direction of the first mating hole 432 and communicates with the first mating hole 432. In specific applications, when the first adjusting member 43 slides to the target height, the locking screw is screwed into the threaded hole and pressed against the surface of the square first support column 14, so that the head of the locking screw is in close contact with the first support column 14, forming frictional resistance and achieving locking between the two. Alternatively, the outer periphery of the first support column 14 is provided with external threads, and the wall of the first mating hole 432 of the first adjusting member 43 is provided with internal threads. The first support column 14 and the first adjusting member 43 are threadedly engaged to form a screw-nut structure, realizing the up and down movement of the first adjusting member 43, and enabling the first adjusting member 43 to be locked after it stops moving.

[0056] Similarly, the second rotating support 42 includes a second main body and two second connecting posts respectively connected to both ends of the second main body. The second main body is used to support the corresponding battery pack 2. Each second adjusting member 44 is provided with a second connecting hole extending along the length direction Y. The two second connecting posts extend into the second connecting holes of the two second adjusting members 44 in the same set of adjustable support assemblies 4 to realize the connection between the second rotating support 42 and the second adjusting member 44. Furthermore, the second adjusting member 44 includes a second mating hole, and the second supporting post 15 passes through the second mating hole so that the second adjusting member 44 moves on the second supporting post 15. That is to say, the second rotating support 42 and the first rotating support 41 have the same technical features, so they can achieve the same technical effect, which will not be described in detail here.

[0057] In some embodiments, such as Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, each adjustable support assembly 4 includes a first drive member 45 and a second drive member 46 arranged opposite each other in the width direction X. The first drive member 45 is used to drive the first rotating support member 41 to rotate, and the second drive member 46 is used to drive the second rotating support member 42 to rotate. The energy storage device also includes a control module 5. Figure 3 and Figure 4 (not shown in the image), the control module 5 is electrically connected to the first drive element 45 and / or the second drive element 46 in each set of adjustable support components 4.

[0058] Specifically, please continue to refer to Figure 3 and Figure 4 In this embodiment, the first driving component 45 is the first driving motor, and the second driving component 46 is the second driving motor. The first driving motor directly drives the first rotating support 41 to rotate. The second driving motor directly drives the second rotating support 42 to rotate. The rotation axes of both the first rotating support 41 and the second rotating support 42 are parallel to the length direction Y. The first driving motor and the second driving motor can independently control the rotation angle of the first rotating support 41 and the second rotating support 42. For example, rotating the first rotating support 41 counterclockwise raises the left side of the battery pack 2, and rotating the second rotating support 42 clockwise raises the right side of the battery pack 2. Thus, the tilt direction of the battery pack 2 can be flexibly adjusted and the tilt angle precisely adjusted according to real-time thermal management requirements or the state of the battery pack 2. That is, both the first adjusting component 43 and the second adjusting component 44 are driving components.

[0059] Please continue to refer to Figure 8 and Figure 9 , Figure 8 and Figure 9 The illustrated embodiments and Figure 3The difference in the illustrated embodiment is that the first driving member 45 is indirectly connected to the first rotating support member 41 via the first adjusting member 43, and the second driving member 46 is indirectly connected to the second rotating support member 42 via the second adjusting member 44. Therefore, by transmitting the power of the first driving member 45 to the first rotating support member 41 via the first adjusting member 43, and transmitting the power of the second driving member 46 to the second rotating support member 42 via the second adjusting member 44, the force application path is more dispersed, reducing the risk of stress concentration and ensuring the smoothness of the transmission process. Please refer to Figure 12 In this embodiment, each battery pack 2 has multiple battery cells 23 housed within its casing 21. Each battery cell 23 and liquid cooling plate 22 are tilted in the same direction and at the same angle. When all battery cells 23 and liquid cooling plates 22 are tilted in the same direction (e.g., towards the top or bottom of the casing 21) at the same angle, the air layer between the top of the battery cell 23 and the liquid cooling plate 22 will uniformly gather towards the top corner of the casing 21 under the influence of gravity. This minimizes the coverage area of ​​the air layer, maximizes the effective heat conduction area, significantly reduces interfacial thermal resistance, and improves heat dissipation efficiency.

[0060] Please continue to refer to Figure 1 There is an inclined angle α between the liquid cooling plate 22 and the top plate 11. If the inclined angle α = 0° (i.e., the liquid cooling plate 22 is placed horizontally), the air layer between the top of the battery cell 23 and the liquid cooling plate 22 will not be able to naturally accumulate due to gravity, causing the air layer to cover the surface of the battery cell 23, forming a heat insulation layer, significantly increasing the interfacial thermal resistance and reducing the heat dissipation efficiency. Therefore, the inclined angle α is greater than 0° and less than or equal to 10°. Even a small inclination (such as 1°) can disrupt the uniform distribution of the air layer, causing the gas to accumulate at the upper end, reducing the coverage area and increasing the effective heat conduction area. When the inclined angle α increases to 10°, the air layer can quickly accumulate at the upper corner.

[0061] For example, the tilt angle α can be any angle among 1°, 1.5°, 2.0°, 2.5°, 3.0°, 3.5°, 4.0°, 4.5°, 5.0°, 5.5°, 6.0°, 6.5°, 7.0°, 7.5°, 8.0°, 8.5°, 9.0°, 9.5°, and 10°. Of course, in other embodiments, the tilt angle α can also be 12°, 15°, 18°, or 20°. When the tilt angle α exceeds 10°, although the hot air accumulation speed is further increased, the significant shift in the center of gravity of the battery pack 2 requires the cabinet 1 to have higher strength.

[0062] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application, and the content of this specification should not be construed as a limitation of this application.

Claims

1. An energy storage device, characterized in that, The energy storage device includes: The cabinet has a top panel and a bottom panel that are positioned opposite each other in the vertical direction; Multiple battery packs are stacked in the cabinet along the height direction, and each battery pack includes a housing and a liquid cooling plate, the liquid cooling plate being disposed on the side of the housing facing the top plate; The liquid cooling plate is inclined relative to the top plate.

2. The energy storage device according to claim 1, characterized in that, The housing and liquid cooling plate in each of the battery packs are tilted in the same direction.

3. The energy storage device according to claim 1 or 2, characterized in that, The cabinet has a width direction, and the width direction intersects with the height direction; the energy storage device further includes: Multiple sets of support components are spaced apart along the height direction and fixedly installed on the cabinet. Each set of support components includes a first support member and a second support member that are arranged opposite each other in the width direction. In the same set of support components, the first support member and the second support member are staggered in the height direction and are both fixedly connected to the housing of the corresponding battery pack.

4. The energy storage device according to claim 1 or 2, characterized in that, The cabinet has a width direction, and the width direction intersects with the height direction; the energy storage device further includes: Multiple sets of adjustable support components are spaced apart along the height direction, and each set of adjustable support components includes a first rotating support member and a second rotating support member that are arranged opposite to each other in the width direction; In the same set of adjustable support assemblies, the first rotating support and / or the second rotating support are rotatably disposed within the cabinet; a set of battery packs are placed on the first rotating support and the second rotating support of the set of adjustable support assemblies.

5. The energy storage device according to claim 4, characterized in that, The cabinet has a width direction and a length direction, and the length direction, the width direction and the height direction intersect each other; each set of adjustable support components includes a first rotating support extending along the length direction, and two first adjusting members spaced apart along the length direction, one of the first adjusting members being connected to one end of the first rotating support member, and the other first adjusting member being connected to the other end of the first rotating support member.

6. The energy storage device according to claim 5, characterized in that, The cabinet includes two first support columns, both of which extend along the height direction and are spaced apart along the length direction; the first adjustment element in each set of adjustable support components can be movably mounted on the corresponding first support column.

7. The energy storage device according to claim 6, characterized in that, The first rotating support includes a first main body and two first connecting posts respectively connected to both ends of the first main body. The first main body is used to support the corresponding battery pack. Each of the first adjusting members is provided with a first connecting hole extending along the length direction. The two first connecting posts respectively extend into the first connecting holes of the two first adjusting members in the same set of adjustable support assemblies to realize the connection between the first rotating support member and the first adjusting member.

8. The energy storage device according to claim 6, characterized in that, The first adjusting member includes a first mating hole, and the first support column passes through the first mating hole so that the first adjusting member can move on the first support column.

9. The energy storage device according to claim 4, characterized in that, Each set of adjustable support components includes a first driving member and a second driving member disposed opposite to each other in the width direction. The first driving member is used to drive the first rotating support member to rotate, and the second driving member is used to drive the second rotating support member to rotate. The energy storage device also includes: The control module is electrically connected to the first drive and / or the second drive in each set of the adjustable support components.

10. The energy storage device according to claim 1, characterized in that, The top plate is set perpendicular to the height direction, and there is an inclined angle α between the liquid cooling plate and the top plate, wherein the inclined angle α is greater than 0° and less than or equal to 10°.

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