Air-cooling temperature difference balancing device and energy storage equipment

Abstract

The air cooling temperature difference balancing device is applied to heat dissipation objects of the energy storage equipment and comprises a fixing support and a flow guide plate, the heat dissipation objects are arranged on one side of an air channel of the energy storage equipment in the air channel direction, and the fixing support is suitable for being arranged on the side, close to the heat dissipation objects, in the air channel; a plurality of air inlet holes are formed in the side, close to the air channel, of the heat dissipation object, the heat dissipation object is suitable for active air inlet through the air inlet holes, and the flow guide plate is suitable for being detachably and movably arranged on the fixing support and suitable for covering different numbers of air inlet holes and limiting air inlet of the air inlet holes. The device has the advantages of being good in temperature difference control capability, convenient to install, free of maintenance and high in reliability.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an air-cooled temperature difference equalization device and energy storage equipment. Background Technology

[0002] With the surge in demand for new energy storage batteries, air cooling technology has become the mainstream choice for small and medium-sized energy storage systems due to its advantages such as low cost and simple structure. However, traditional air cooling systems have significant vertical temperature difference problems: when cold air flows from top to bottom, the air pressure decreases, resulting in insufficient cooling of the lower layer of batteries and waste of cooling capacity in the upper layer. In addition, the accumulation of hot air can easily cause local high temperature (ΔT>10℃), which accelerates battery aging. Industry data shows that for every 5℃ increase in temperature difference, the battery cycle life decreases by about 20%, and more than 60% of air cooling failures are caused by uneven heat distribution.

[0003] To improve the uniformity of heat dissipation, several common methods exist, including optimizing the flow distribution perforated plates / grids, layered independent air ducts, air-cooling + liquid-cooling hybrid systems, and fan booster compensation.

[0004] However, the inventors believe that the above-mentioned technologies have the following drawbacks: the above-mentioned methods for improving heat dissipation uniformity have problems such as poor effect, poor installation compatibility, low reliability, high cost, high noise, and difficult maintenance. Utility Model Content

[0005] This application provides one or more embodiments of an air-cooled temperature difference equalization device and an energy storage device to solve or at least partially alleviate the problem of poor uniformity of air-cooled multi-layer heat dissipation in related technologies.

[0006] One or more embodiments of this application provide an air-cooled temperature difference equalization device and an energy storage device, adopting the following technical solution:

[0007] A wind-cooled temperature difference equalization device is applied to the heat dissipation object of an energy storage device, including a fixed bracket and a guide plate. The heat dissipation object is arranged along the air duct direction on one side of the air duct of the energy storage device. The fixed bracket is adapted to be arranged in the air duct on the side close to the heat dissipation object. The side of the heat dissipation object close to the air duct is provided with multiple air inlets. The heat dissipation object is adapted to actively intake air through the air inlets. The guide plate is adapted to be detachably and movablely mounted on the fixed bracket. The guide plate is adapted to cover different numbers of the air inlets and restrict the air intake through the air inlets.

[0008] In some embodiments, the air inlets are arranged perpendicular to the air duct direction, and the guide plate is adapted to set the length and / or position perpendicular to the air duct direction to limit the air intake of different numbers of the air inlets; the heat dissipation object is provided with a heat dissipation port at one end perpendicular to the air duct, and the arrangement density of the air inlets gradually increases from the direction close to the heat dissipation port to the direction away from the heat dissipation port; the length and / or position of the guide plate is determined according to the temperature of the heat dissipation object.

[0009] In some embodiments, the guide plate is provided with a corrugated structure on the side near the heat dissipation object, the length direction of the corrugated structure is perpendicular to the air duct direction, and the corrugated structure and the heat dissipation object are adapted to form a guide gap.

[0010] In some embodiments, the corrugated structure is a trapezoidal corrugated structure, and the angles on both sides of the trapezoidal corrugated structure are α, where 45°≤α≤60°.

[0011] In some embodiments, the corrugated structure is a trapezoidal corrugated structure, and the relationship between the wavelength λ and the wave height h of the trapezoidal corrugated structure is h / λ=0.21.

[0012] In some embodiments, the corrugated structure is a trapezoidal corrugated structure, a triangular corrugated structure, or a sinusoidal corrugated structure; the guide plate and the heat dissipation object are parallel to each other at the guide gap.

[0013] In some embodiments, the fixed bracket is provided with a connecting groove, and the guide plate is provided with a connecting part on one side. The connecting part is adapted to fit into the connecting groove and is adapted to slide along the connecting groove. The opening width of the connecting groove is smaller than the bottom width of the connecting groove. The fixed bracket is provided with a fixing member, which is adapted to move along the connecting groove and is adapted to restrict the movement of the guide plate along the connecting groove.

[0014] In some embodiments, the guide plate is provided with a magnetic attraction structure, and the guide plate is adapted to be magnetically connected to the fixed bracket through the magnetic attraction structure.

[0015] In some embodiments, the edge of the guide vane is provided with a lightweight blade structure, which is adapted to rotate with the airflow in the duct to disturb the airflow distribution between the guide vane and the heat dissipation object.

[0016] An energy storage device includes a battery pack and any of the aforementioned air-cooled temperature difference equalization devices. The battery pack is the heat dissipation object of the air-cooled temperature difference equalization device. A vertical air duct is arranged inside the energy storage device. A support frame is provided inside the energy storage device along the direction of the air duct. The battery pack and the air-cooled temperature difference equalization device are respectively arranged on the support frame along the direction of the air duct.

[0017] Compared with related technologies, one or more embodiments of this application include at least one of the following beneficial technical effects:

[0018] (1) The air-cooled temperature difference equalization device of this application is a modular structure. By arranging movable guide plates, the air inlets of different heat dissipation objects are partially blocked in different numbers, which can accurately control the difference in air volume of different heat dissipation objects. Compared with the traditional solution, the temperature difference can be reduced from more than 10°C to less than 5°C, effectively extending the battery life and solving the problem of insufficient reliability of complex adjustment mechanism. It abandons the layered independent air duct design that relies on dynamic air valves or electronic control components, and adopts a static guide plate structure to achieve maintenance-free operation under all working conditions, reducing temperature control failure caused by mechanical failure or response delay. At the same time, it has strong compatibility, does not require modification of the air duct, is compatible with existing equipment, is easy to maintain, and is suitable for upgrading existing systems. It breaks through the limitations of traditional technology with a simple physical structure, taking into account low cost, high reliability and significant temperature control improvement, providing an efficient solution for the field of new energy storage, especially helping small and medium-sized air-cooled systems to expand to high energy density scenarios.

[0019] (2) The energy storage device of this application can be directly equipped with a wind-cooled temperature difference equalization device to achieve precise control of the temperature difference between battery packs of different layers. This solves the problem of excessive vertical temperature difference (ΔT>10℃) caused by the attenuation of cold air flowing from top to bottom in traditional wind-cooled systems. It does not require additional fan power (energy consumption remains unchanged) or modification of the main structure of the air duct. It adapts to the mainstream wind-cooled system architecture through modular flow guide components. It does not require replacement of battery packs or reconstruction of thermal management links, and supports performance upgrades for old systems after shutdown. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this application and are not intended to limit this application.

[0021] Figure 1 This is an overall structural view of an air-cooled temperature difference equalization device according to some embodiments of this application.

[0022] Figure 2 This is a schematic diagram of the installation of an air-cooled temperature difference equalization device according to some embodiments of this application.

[0023] Figure 3 According to some embodiments of this application Figure 2 A magnified view of point a in the middle.

[0024] Figure 4 According to some embodiments of this application Figure 1 A magnified view of point b in the middle.

[0025] Figure 5 This is a schematic diagram of the arrangement of an air-cooled temperature difference equalization device in an energy storage device according to some embodiments of this application.

[0026] Figure 6 This is a top view of a TV cabinet according to some embodiments of this application.

[0027] Figure 7 According to some embodiments of this application Figure 6 A cross-sectional view along the AA direction.

[0028] Figure 8 According to some embodiments of this application Figure 7 A magnified view of point b in the middle.

[0029] In the diagram: 1. Fixed bracket; 11. Connecting groove; 2. Guide plate; 21. Corrugated structure; 22. Connecting part; 3. Battery pack; 31. Air inlet; 32. Heat dissipation port; 4. Guide gap; 5. Fixture; 6. Energy storage device; 61. Support frame. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, 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.

[0032] In the description of this application, it should be understood that the terms "center", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation can be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. Those skilled in the art will understand, explicitly and implicitly, that the implementations described in this application can be combined with other implementations.

[0035] As mentioned above, it should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, components, or groups of features, integers, steps, or components. As used in this application, the singular forms "a," "an," and "the" also include the plural forms, unless the context clearly indicates otherwise.

[0036] One or more embodiments of this application disclose an air-cooled temperature difference equalization device, referencing... Figures 1 to 8 The device includes a fixed bracket 1 and a guide plate 2. The heat dissipation object (in this application, the battery pack 3 is mainly used as an example) is arranged along the air duct direction on one side of the air duct. The fixed bracket 1 is suitable for being arranged in the air duct on the side close to the heat dissipation object. The heat dissipation object is provided with a plurality of air inlets 31 on the side close to the air duct. The heat dissipation object is suitable for actively taking in air through the air inlets 31.

[0037] The air guide plate 2 is detachably and movablely mounted on the fixed bracket 1. The air guide plate 2 is suitable for covering different numbers of air inlets 31 to restrict the air intake of the air inlets 31. The air guide plate 2 is arranged in layers in the air duct. By partially blocking the heat dissipation object at the front of the air duct, the excessive input of cold air into the heat dissipation object at the front of the air duct is restricted. This allows more cold air to enter the heat dissipation object in the middle and rear of the air duct along the air duct, improving the heat dissipation capacity of the heat dissipation object in the middle and rear. This makes the heat dissipation state of the heat dissipation object at each position of the air duct more similar to each other, effectively reducing the temperature difference.

[0038] like Figure 5 In the embodiment shown, the air inlets 31 are arranged perpendicular to the air duct direction. The guide plate 2 is adapted to be set with a length and / or position perpendicular to the air duct direction to limit the intake of different numbers of air inlets 31. It can be understood that the longer the guide plate 2 is, the larger the area of ​​its position that blocks the heat dissipation object on the side close to the air duct, and the more the air inlets 31 are covered, which can reduce the excessive input of cold air into the heat dissipation object. Conversely, it can increase the input of cold air into the heat dissipation object.

[0039] Furthermore, the heat dissipation object is equipped with temperature monitoring. The length and / or position of the guide plate 2 are determined according to the temperature of the heat dissipation object. If the temperature of the heat dissipation object is too high, the length of the guide plate 2 can be shortened, or the guide plate 2 can be moved to reduce the coverage of the number of air inlet holes 31, and vice versa.

[0040] When applied to energy storage devices with multi-layer heat dissipation objects, the length and / or position of the corresponding guide plate 2 for each layer can be set and adjusted individually according to the temperature difference of each heat dissipation object during stable operation.

[0041] like Figure 5In the embodiment shown, a heat dissipation port 32 is provided at one end of the heat dissipation object perpendicular to the air duct. The arrangement density of the air inlet 31 gradually increases from the direction close to the heat dissipation port 32 to the direction away from the heat dissipation port 32. When the air inlet 31 is not blocked, more cold air can enter the heat dissipation object from the part of the heat dissipation object away from the heat dissipation port 32, thereby improving the heat dissipation uniformity inside the heat dissipation object, effectively reducing the temperature difference inside the heat dissipation object, and improving the utilization rate of cold air.

[0042] like Figure 5 In the embodiment shown, a fan or other device is provided at the heat dissipation port 32 to exhaust air and dissipate heat inside the heat dissipation object. After the air inside the heat dissipation object is exhausted, the air inlet 31 can actively intake air, thereby realizing the circulation of cold air.

[0043] like Figures 1 to 3 In the embodiment shown in Figure 8, the guide plate 2 is provided with a corrugated structure 21 on the side near the heat dissipation object. The length direction of the corrugated structure 21 is perpendicular to the air duct direction. The corrugated structure 21 and the heat dissipation object are suitable for forming a guide gap 4. The corrugated structure 21 can guide the airflow passing through the guide gap 4, so that the cold air that does not enter the heat dissipation object from the air inlet 31 can be accurately guided to the subsequent heat dissipation object area. This static and non-powered design reduces the increase in energy consumption.

[0044] Specifically, the guide plate 2 and the heat dissipation object are parallel to each other at the guide gap 4 to ensure that the corrugated structure 21 has a consistent airflow guiding effect on each area of ​​the guide gap 4.

[0045] In some embodiments, the corrugated structure 21 is a trapezoidal corrugated structure, a triangular corrugated structure, or a sinusoidal corrugated structure. The trapezoidal corrugated structure can utilize the Karman vortex street phenomenon generated by the periodic wave crest to achieve a balanced distribution of cold energy between the upper and lower layers. The triangular corrugated structure can increase the turbulence effect, but it has greater noise and resistance. The sinusoidal corrugated structure can reduce noise and resistance, but its temperature control is weaker and its mold processing is more complex. Considering the above, in at least one embodiment of this application, a trapezoidal corrugated structure is used to balance the flow guiding efficiency and the flow separation intensity.

[0046] like Figure 3 In the embodiment shown, when the corrugated structure 21 is a trapezoidal corrugated structure, the angles on both sides of the trapezoidal corrugated structure are α, 45°≤α≤60°, which can suppress the secondary flow of the airflow in the guide gap 4. If the angle is too large (greater than 60°), it is easy to induce lateral secondary flow and reduce the vertical guide efficiency. If the angle is too small (less than 45°), the airflow will diffuse too early. 45°≤α≤60° can destroy the longitudinal momentum of the airflow and suppress the overrush of the upper cold air.

[0047] In some embodiments, the trapezoidal corrugated structure has two sides at an angle of 55°, which can enhance the airflow guidance effect of the duct and balance resistance and noise.

[0048] In some embodiments, the relationship between the wavelength λ and wave height h of the trapezoidal corrugated structure is h / λ=0.21, which can optimize the generation of eddies.

[0049] The principle behind the formation of the Karman vortex street phenomenon by a trapezoidal corrugated structure is as follows: Assume the parameters of the trapezoidal corrugated structure are: upper base 8.5mm, lower base 12mm, height 2.5mm, length 400mm, corrugation direction is horizontal (perpendicular to the airflow direction in the duct), wavelength λ: 12mm, wave height h: 2.5mm (h / λ=0.21), trapezoidal angle: 55°, vortex spatial distribution is a pair of counter-rotating vortices generated every 12mm wavelength, airflow guiding efficiency: Stokes number (Stk) correlation, p=1.225kg / m³ (cold air density, 25℃), d=0.001m (equivalent diameter of cold air mass), v=3m / s (duct wind speed), μ=1.789×10−5 Pa (aerodynamic viscosity, 25℃), L=λ=12 mm=0.012 m (characteristic length, taken as ripple wavelength), according to the above calculation, when the wavelength λ is 12mm and the wave height h is 2.5mm, the ratio of airflow inertial force to viscous force Stk < 1. The cold air mass has weak inertial force and can follow the airflow to deflect, reducing the impact of the cold air mass on the surface of the guide plate 2.

[0050] Experimental verification shows that the air-cooled temperature difference equalization device of this application has good temperature control effect. When applied in an air-cooled cabinet, the maximum temperature difference ΔT ≤ 5℃. The air-cooled temperature difference equalization device of this application has the core advantages of simple structure, static control and low cost adaptation, which solves the problem of large vertical temperature difference and large transformation cost of traditional air-cooling technology, and provides an efficient, reliable and economical thermal management upgrade path for small and medium-sized air-cooled energy storage systems.

[0051] In some embodiments, the fixed bracket 1 is provided with a connecting groove 11, and the guide plate 2 is provided with a connecting part 22 on one side. The connecting part 22 is adapted to fit into the connecting groove 11 and to slide along the connecting groove 11. Specifically, the plane of the guide plate 2 is parallel to the direction of the air duct, and the direction of movement of the guide plate 2 is perpendicular to the direction of the air duct, so that the obstruction and interference of the guide plate 2 on the airflow of the air duct is minimized, and the air inlet 31 can also be blocked.

[0052] like Figures 1 to 2 In the embodiment shown, the fixed bracket 1 is provided with bolt holes and hooks at both ends, so that the fixed bracket 1 can be stably fixed to the periphery of the heat dissipation object, adapt to the layout of heat dissipation objects such as mainstream battery packs 3, adapt to irregular arrangements, and support quick installation.

[0053] like Figure 1 , 2In the embodiments shown in Figure 4, a fixing member 5 is provided on the fixing bracket 1. The fixing member 5 can be a snap-fit ​​structure. The fixing member 5 is suitable for fixing at any position of the connecting groove 11 to restrict the movement of the guide plate 2.

[0054] like Figure 2 and 3 In the embodiment shown, the opening width of the connecting groove 11 is smaller than the bottom width of the connecting groove 11. It can also be understood that the width of the end of the connecting part 22 is greater than the width of the root of the connecting part 22. The assembly and disassembly are simple and convenient, and the guide plate 2 can be effectively fixed on the fixed bracket 1, thereby reducing the probability of shaking and falling off.

[0055] In some embodiments, the guide plate 2 is provided with a magnetic attraction structure, and the guide plate 2 is adapted to be magnetically combined with the fixing bracket 1 through the magnetic attraction structure, which makes the deployment and maintenance more efficient and easier to clean and maintain.

[0056] In some embodiments, the edge of the guide vane 2 is provided with a lightweight blade structure. The lightweight blade structure is suitable for rotating with the airflow in the duct to disturb the airflow distribution between the guide vane 2 and the heat dissipation object. It can operate with zero energy consumption and reduce ΔT to ≤5℃. However, the rotation speed is greatly affected by wind speed fluctuations, and it is prone to jamming in high humidity environments. Its lifespan is limited, so it can be used selectively.

[0057] One or more embodiments of this application disclose an energy storage device, with reference to... Figures 5 to 8 It includes a battery pack 3 and an air-cooled temperature difference equalization device according to any of the above embodiments. The battery pack 3 serves as the heat dissipation target of the air-cooled temperature difference equalization device. A vertical air duct is arranged inside the energy storage device 6 (see reference). Figure 8 (In the direction of the arrow in the image), a support frame 61 is provided inside the energy storage device 6 along the air duct direction, and the battery pack 3 and the air-cooled temperature difference equalization device are arranged on the support frame 61 along the air duct direction.

[0058] The specific implementation steps are as follows:

[0059] Step 1: Install the air-cooled temperature difference equalization device at the support frame 61 inside the energy storage device 6, and fix the guide plate 2 bracket to the side wall of the air duct by tightening bolts.

[0060] Step 2: Based on the arrangement of the battery pack 3 modules (such as the concave and convex surfaces of square / soft-pack batteries), insert the lower part of the air guide plate 2 into the connecting slot 11 of the air guide plate 2 bracket through a groove-type installation, and quickly fix the air guide plate 2 with fasteners 5, etc. The initial blocking ratio is 30%-40% of the upper air inlet area (achieved by adjusting the coverage of the air guide plate 2).

[0061] Step 3: After starting the air-cooling system, monitor the temperature difference of each battery layer in real time (the target temperature difference threshold is set to ≤5℃). If the temperature difference between the upper and lower layers is >5℃, loosen the fixing piece 5 and slide the guide plate 2 forward 5-8mm along the connecting groove 11 to increase the upper layer shading ratio to 45%-50%, forcing more cold air to flow to the middle and lower layers.

[0062] Step 4: In the middle and lower battery area, you can choose not to install the air deflector 2, so that more air can enter the battery pack 3 to make up for the loss caused by the decrease in air speed in the lower layer of traditional air cooling.

[0063] Step 5: After adjustment, run the system for 24 hours to verify the temperature difference uniformity. If the vertical temperature difference is still >5℃, fine-tune the position of the deflector plate 2 at 2mm intervals until the temperature difference stabilizes within the range of ≤5℃. The system does not require dynamic adjustment throughout the entire cycle, and only requires quarterly inspection and cleaning of the dust accumulation on the surface of the deflector plate 2.

[0064] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A wind-cooled temperature difference equalization device, applied to the heat dissipation of energy storage equipment, characterized in that: The device includes a fixed bracket and a guide plate. The heat dissipation object is arranged along the air duct direction on one side of the air duct of the energy storage device. The fixed bracket is adapted to be arranged in the air duct on the side close to the heat dissipation object. The heat dissipation object is provided with multiple air inlets on the side close to the air duct. The heat dissipation object is adapted to actively intake air through the air inlets. The guide plate is adapted to be detachably and movablely mounted on the fixed bracket. The guide plate is adapted to cover different numbers of the air inlets and restrict the air intake through the air inlets.

2. The air-cooled temperature equalization device of claim 1, wherein: The air inlets are arranged perpendicular to the air duct direction, and the guide plate is adapted to be set with a length and / or position perpendicular to the air duct direction to limit the air intake of different numbers of air inlets; the heat dissipation object is provided with a heat dissipation port at one end perpendicular to the air duct, and the arrangement density of the air inlets gradually increases from the direction close to the heat dissipation port to the direction away from the heat dissipation port; the length and / or position of the guide plate is determined according to the temperature of the heat dissipation object.

3. The air-cooled temperature equalization device of claim 1, wherein: The guide plate has a corrugated structure on the side near the heat dissipation object. The length direction of the corrugated structure is perpendicular to the air duct direction, and a guide gap is formed between the corrugated structure and the heat dissipation object.

4. The air-cooled temperature equalization device of claim 3, wherein: The corrugated structure is a trapezoidal corrugated structure, and the angles on both sides of the trapezoidal corrugated structure are α, where 45°≤α≤60°.

5. The air-cooled temperature equalization device of claim 3, wherein: The corrugated structure is a trapezoidal corrugated structure, and the relationship between the wavelength λ and the wave height h of the trapezoidal corrugated structure is h / λ=0.

21.

6. The air-cooled temperature equalization device of claim 3, wherein: The corrugated structure is a trapezoidal corrugated structure, a triangular corrugated structure, or a sinusoidal corrugated structure; the guide plate and the heat dissipation object are parallel to each other at the guide gap.

7. The air-cooled temperature equalization device of claim 1, wherein: The fixed bracket is provided with a connecting groove, and the guide plate is provided with a connecting part on one side. The connecting part is adapted to fit into the connecting groove and is adapted to slide along the connecting groove. The opening width of the connecting groove is smaller than the bottom width of the connecting groove; a fixing member is provided on the fixing bracket, the fixing member is adapted to move along the connecting groove, and the fixing member is adapted to restrict the movement of the guide plate along the connecting groove.

8. The air-cooled temperature equalization device of claim 1, wherein: The guide plate is provided with a magnetic attraction structure, and the guide plate is adapted to be magnetically combined with the fixed bracket through the magnetic attraction structure.

9. The air-cooled temperature difference equalization device as described in claim 1, characterized in that: The edge of the guide plate is provided with a lightweight blade structure, which is adapted to rotate with the airflow in the air duct to disturb the airflow distribution between the guide plate and the heat dissipation object.

10. An energy storage device, characterized by: The device includes a battery pack and the air-cooled temperature difference equalization device as described in any one of claims 1 to 9. The battery pack is the heat dissipation object of the air-cooled temperature difference equalization device. A vertical air duct is arranged inside the energy storage device. A support frame is arranged inside the energy storage device along the air duct direction. The battery pack and the air-cooled temperature difference equalization device are arranged on the support frame along the air duct direction in a cooperative manner.

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