Flow guide cover and battery pack

Abstract

The utility model discloses a flow guide cover and a battery pack, and belongs to the technical field of vehicle parts. The fairing comprises a fairing body and a heat insulation layer, the fairing body is of a hollow structure and is provided with an air inlet and an air outlet, the air inlet is opposite to an exhaust valve of the battery pack, the air inlet direction of the air inlet is different from the air outlet direction of the air outlet, and the heat insulation layer is located at the position, opposite to the air inlet, of the inner wall of the fairing body and connected with the fairing body. Gas released by the exhaust valve passes through the gas inlet, the hollow structure of the flow guide cover body and the gas outlet and then is exhausted into the external environment, the flow guide cover changes the flow direction of the gas, and the flow guide cover can be used for preventing other parts from being placed in the direction right opposite to the exhaust valve. High-temperature and high-speed gas sprayed out of the exhaust valve is prevented from being directly sprayed to other parts, right facing the exhaust valve, of the vehicle through the flow guide cover, and the risk of secondary combustion of other parts of the vehicle is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle parts, and particularly to a fairing and a battery pack. Background Art

[0002] With the passage of time and the strong support of national policies, new energy vehicles are gradually occupying the main share of the market. At present, the power batteries used in new energy vehicles are mostly lithium-ion batteries, especially ternary lithium and lithium iron phosphate. While lithium-ion batteries bring advantages such as excellent performance, rich resources, and low cost, they also inevitably bring greater safety risks.

[0003] When a thermal runaway occurs in the battery pack of a vehicle, a large amount of flammable gas and heat are generated by the decomposition of the electrolyte material inside. To reduce the explosion risk of the battery pack, an exhaust valve is generally provided on the outer wall of the battery pack. When a thermal runaway occurs inside the battery pack, the exhaust valve is triggered to open, and a large amount of high-temperature and high-speed gas is quickly released.

[0004] In many vehicles, other components are placed in the direction directly opposite to the exhaust valve, which may be dangerous components such as a fuel tank and a high-voltage harness. The high-temperature and high-speed gas ejected from the exhaust valve may cause secondary combustion of other components directly opposite to the exhaust valve, exacerbating the safety risk of the vehicle. Summary of the Utility Model

[0005] Embodiments of the present disclosure provide a fairing and a battery pack, which can solve the above technical problems existing in the related art. The technical solutions are as follows:

[0006] In a first aspect, a fairing is provided. The fairing includes a fairing body and a heat insulation layer;

[0007] The fairing body has a hollow structure and has an air inlet and an air outlet. The air inlet is opposite to the exhaust valve of the battery pack, and the air inlet direction and the air outlet direction of the air outlet are different;

[0008] The heat insulation layer is located at a position opposite to the air inlet on the inner wall of the fairing body and is connected to the fairing body.

[0009] In some possible embodiments, the total area of the air outlet is greater than or equal to the flow area after the exhaust valve is opened.

[0010] In some possible embodiments, the fairing body includes a first cover wall and a second cover wall which are oppositely arranged. The first cover wall has the air inlet and is connected to the housing of the battery pack. The inner wall of the second cover wall is connected to the heat insulation layer, and the second cover wall is not perforated.

[0011] In some possible embodiments, the distance from the first cover wall to the heat insulation layer on the inner wall of the second cover wall is greater than the movement stroke of the exhaust valve.

[0012] In some possible embodiments, the deflector body further includes two third cover walls oppositely arranged along the width direction of the battery pack. The third cover walls are located between the first cover wall and the second cover wall and are connected to the first cover wall and the second cover wall.

[0013] In some possible embodiments, the third cover wall has a plurality of air outlets, and the plurality of air outlets are evenly distributed on the third cover wall.

[0014] In some possible embodiments, the diameter of the air outlet is 3-5 millimeters.

[0015] In some possible embodiments, the deflector body further includes two fourth cover walls oppositely arranged along the height direction of the battery pack. The fourth cover walls are respectively connected to the first cover wall and the second cover wall, and the fourth cover walls are not perforated.

[0016] In some possible embodiments, the deflector further includes an anti-corrosion layer, and the anti-corrosion layer is located on the outer surface of the deflector body and is connected to the deflector body.

[0017] In a second aspect, a battery pack is provided. The battery pack includes a housing, an exhaust valve located on the outer wall of the housing, and the deflector according to any one of the first aspect. The air inlet of the deflector body sleeves the exhaust valve.

[0018] The beneficial effects brought by the technical solution provided by the present disclosure at least include:

[0019] In the present disclosure, the gas released by the exhaust valve passes through the air inlet, the hollow structure of the deflector body, and the air outlet, and then is discharged into the external environment. The deflector changes the flow direction of the gas. For the case where there are other components placed in the direction directly opposite to the exhaust valve, the deflector avoids the high-temperature and high-speed gas ejected by the exhaust valve from directly spraying onto other components of the vehicle opposite to the exhaust valve, reducing the risk of secondary combustion of other components of the vehicle.

[0020] In addition, the heat insulation layer located on the inner wall of the deflector body can also effectively reduce the risk of deformation, fracture, and melting of the deflector body under the impact of high-temperature and high-speed gas.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a fairing provided by an embodiment of the present disclosure;

[0024] Figure 2 It is a schematic cross-sectional view of a fairing provided by an embodiment of the present disclosure;

[0025] Figure 3 It is a partial schematic diagram of a battery pack provided by an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 1. Fairing body, 1a. Air inlet, 1b. Air outlet, 1c. Installation part, 1d. Installation hole;

[0028] 11. First wall, 12. Second wall, 13. Third wall, 14. Fourth wall;

[0029] 2. Heat insulation layer;

[0030] 3. Anticorrosion layer;

[0031] 100. Housing, 200. Exhaust valve.

[0032] Through the above accompanying drawings, the clear embodiments of the present disclosure have been shown, and there will be more detailed descriptions later. These accompanying drawings and text descriptions are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0033] To make the purpose, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0034] Currently, most of the power batteries used in new energy vehicles are lithium-ion batteries. While lithium-ion batteries bring advantages such as excellent performance, rich resources, and low cost, they also inevitably bring greater safety risks. The essence of the energy generation of lithium-ion batteries lies in the chemical energy generated by the chemical reaction between different materials inside the battery cells. When the battery pack undergoes thermal runaway due to factors such as internal short circuit, overcharge, external damage, and aging of the battery, a large amount of heat will be generated instantaneously. At the same time, a large amount of flammable gas is generated by the decomposition of the electrolyte, resulting in the air pressure inside the battery pack being higher than that of the external environment. The battery pack is extremely likely to explode, threatening the personal safety of the cockpit personnel.

[0035] In related technologies, an exhaust valve is usually provided on the battery pack housing to timely discharge the gas inside the battery pack to the external environment, maintain the air pressure balance inside and outside the battery pack, and reduce the risk of battery pack explosion. However, the gas just discharged from the exhaust valve has the characteristics of high temperature and high speed, and it is extremely easy to ignite the vehicle components opposite to the exhaust valve, further increasing the safety risk of the vehicle.

[0036] Refer to Figure 1 As shown, an embodiment of the present disclosure provides a fairing, which may include a fairing body 1 and a heat insulation layer 2.

[0037] The fairing body 1 has a hollow structure and has an air inlet 1a and an air outlet 1b. The air inlet 1a is opposite to the exhaust valve 200 of the battery pack, and the air inlet direction of the air inlet 1a is different from the air outlet direction of the air outlet 1b. The heat insulation layer 2 is located at a position opposite to the inner wall of the fairing body 1 and the air inlet 1a, and is connected to the fairing body 1.

[0038] At the same time, inside many vehicles, other components are placed in the direction directly opposite to the exhaust valve 200, which may be dangerous components such as fuel tanks and high-voltage wiring harnesses. And there are no specified vehicle components (such as high-risk components like fuel tanks and high-voltage wiring harnesses) within a specified distance in the direction directly opposite to the air outlet 1b of the fairing body 1.

[0039] In this way, the high-temperature and high-speed gas, electrolytic liquid, and dust discharged from the exhaust valve 200 (hereinafter described by taking the high-temperature and high-speed gas as an example) enter the hollow structure of the fairing body 1 from the air inlet 1a and are then transferred to the external environment from the air outlet 1b. Since the air inlet direction of the air inlet 1a is different from the air outlet direction of the air outlet 1b, it is possible to avoid the high-temperature and high-speed gas discharged from the exhaust valve 200 spraying directly at other components such as fuel tanks and high-voltage wiring harnesses without changing the direction, thereby causing damage to other components or secondary ignition, and further avoiding increasing the safety risk of the vehicle and improving the protection ability for the cockpit personnel.

[0040] The present disclosure does not specifically limit the number of the air inlets 1a, which can be matched and set according to the number of exhaust valves on the battery pack, and the relative positions between the multiple air inlets 1a can also be matched and set according to the relative positions between the exhaust valves.

[0041] The present disclosure does not specifically limit the material of the heat insulation layer 2. For example: inorganic materials (such as alumina, calcium carbonate, etc.), polymer materials (such as flame-retardant polyethylene, flame-retardant polypropylene, etc.), composite materials (such as fiberglass fireproof cloth, etc.), and specifically can be matched and set according to parameters such as the cost, material, and processing technology of the fairing.

[0042] In some embodiments, the total area of the air outlet 1b is greater than or equal to the flow-through area after the exhaust valve 200 is opened. Herein, the flow-through area after the exhaust valve 200 is opened refers to the cross-sectional area of the gas and / or liquid that can flow through after the exhaust valve 200 is opened. Since the air outlet 1b is used to discharge the high-temperature and high-speed gas, electrolytic liquid, and dust released by the exhaust valve 200 into the hollow structure of the guide cover body 1 to the external environment, and the occurrence time of the thermal runaway of the battery pack is usually short, that is, the exhaust valve 200 will release a large amount of high-temperature and high-speed gas, electrolytic liquid, and dust in a short time.

[0043] Therefore, if the total area of the air outlet 1b is smaller than the flow-through area after the exhaust valve 200 is opened, it will cause the high-temperature and high-speed gas, electrolytic liquid, and dust released by the exhaust valve 200 to continuously accumulate at the hollow structure of the guide cover body 1 and cannot be discharged in time, thereby causing the pressure inside the guide cover body 1 to gradually increase and triggering an explosion of the guide cover. To avoid damage to the guide cover and improve the overall service life of the guide cover, therefore, the total area of the air outlet 1b is usually set to be greater than or equal to the flow-through area after the exhaust valve 200 is opened, so as to ensure that the high-temperature and high-speed gas, electrolytic liquid, and dust released by the exhaust valve 200 are discharged to the external environment in time.

[0044] The present disclosure does not specifically limit the shape of the guide cover body 1. For example, it can be a regular polyhedron, such as a cuboid, a cube, a regular hexahedron (cube), a regular octahedron, etc., or it can be other irregular shapes, such as a sphere, a cylinder, a prism, etc. Specifically, it can be selected according to parameters such as the installation space and assembly difficulty of the guide cover.

[0045] The present disclosure does not specifically limit the material of the guide cover body 1, which can be selected according to factors such as strength requirements, weight requirements, and manufacturing costs. For example: the material of the guide cover body 1 can be a high-strength metal, which can ensure that the guide cover body 1 is not easily deformed or cracked, and can also effectively resist the impact and friction of foreign objects from the outside.

[0046] The guide cover body 1 can be an integrally formed workpiece obtained by a stamping process, or an assembly formed by connecting multiple workpieces by connection methods such as welding and riveting.

[0047] In some embodiments, the guide cover body 1 includes a first cover wall 11 and a second cover wall 12 that are oppositely arranged. The first cover wall 11 has an air inlet 1a and is connected to the housing 100 of the battery pack. The inner wall of the second cover wall 12 is connected to the heat insulation layer 2, and the second cover wall 12 is not provided with holes.

[0048] The present disclosure does not specifically limit the connection manner between the first cover wall 11 and the housing 100 of the battery pack. For example, the first cover wall 11 may have a mounting portion 1c, and the mounting portion 1c has a mounting hole 1d. The mounting hole 1d is used for guiding the bolt connection between the first cover wall 11 and the housing 100 of the battery pack, and the size of the mounting hole 1d is adapted to the diameter of the bolt. The shape and size of the first cover wall 11 are adapted to the shape and size of the housing 100 around the exhaust valve 200.

[0049] The connection between the flow guide cover body 1 and the housing 100 of the battery pack may also adopt detachable connection methods such as screw fastening connection, hinged connection, snap connection, etc., or non-detachable connection methods such as glue dotting, welding, etc. Specifically, it can be matched and set according to factors such as the use scenario of the battery pack and the connection strength between the flow guide cover body 1 and the housing 100 of different battery packs.

[0050] The connection between the flow guide cover body 1 and the housing 100 can enhance the mechanical strength of the flow guide cover and avoid adverse phenomena such as the flow guide cover falling off or breaking under the impact of the high-temperature and high-speed gas released by the exhaust valve 200.

[0051] Since the second cover wall 12 is opposite to the first cover wall 11, the direction in which the exhaust valve 200 releases high-temperature and high-speed gas, electrolytic liquid, and dust is opposite to the second cover wall 12, that is, the high-temperature and high-speed gas directly impacts the inner wall of the second cover wall 12. In this way, the inner wall of the second cover wall 12 is connected to the heat insulation layer 2, which can reduce adverse phenomena such as deformation, cracks, or melting of the inner wall of the second cover wall 12 under the long-term or multiple impacts of high-temperature and high-speed gas.

[0052] The second cover wall 12 is not provided with holes. After the high-temperature and high-speed gas released by the exhaust valve 200 flows to the inner wall of the second cover wall 12, it is squeezed and changes the flow direction, thereby avoiding the continuous flow of the high-temperature and high-speed gas along the exhaust direction of the exhaust valve 200, and thus avoiding adverse phenomena such as fire, damage, and falling off of other vehicle components (such as fuel tanks, high-voltage wire harnesses, etc.) arranged in the exhaust direction of the exhaust valve 200, reducing the safety risk of the vehicle.

[0053] The present disclosure does not specifically limit the shape of the second cover wall 12, which may be a plane or a curved surface. For example: Refer to Figure 1 As shown, the second cover wall 12 is a rectangular plane. Correspondingly, the second cover wall 12 may be parallel to the first cover wall 11 or not parallel to the first cover wall 11.

[0054] Refer to Figure 2 As shown, in some embodiments, the distance from the first cover wall 11 to the heat insulation layer 2 on the inner wall of the second cover wall 12 is greater than the movement stroke of the exhaust valve 200.

[0055] When the exhaust valve 200 is in the closed state, the end of the exhaust valve 200 is flush with the inner wall of the first cover wall 11. During the process of the exhaust valve 200 gradually opening, the exhaust valve 200 will gradually move in the direction close to the second cover wall 12 until it moves a certain stroke and the exhaust valve 200 is fully opened. Among them, the distance from the position where the exhaust valve 200 is in the closed state to the position where the exhaust valve 200 is in the fully opened state is the movement stroke of the exhaust valve 200.

[0056] If the distance from the first cover wall 11 to the heat insulation layer 2 on the inner wall of the second cover wall 12 is less than or equal to the movement stroke of the exhaust valve 200, the exhaust valve 200 cannot be fully opened or just fits the heat insulation layer 2 on the inner wall of the second cover wall 12 when fully opened, which will cause the exhaust valve 200 to be unable to release the high-temperature and high-pressure gas generated inside the battery pack to the external environment of the battery pack in time, increasing the risk of explosion of the battery pack.

[0057] If the distance from the first cover wall 11 to the heat insulation layer 2 on the inner wall of the second cover wall 12 is much greater than the movement stroke of the exhaust valve 200, for example: 3 - 5 times, it will cause the volume of the deflector body 1 to be relatively large. On the one hand, it is not conducive to the assembly of the deflector body 1 and the housing 100. On the other hand, it increases the material consumption of the deflector body 1, and thus the manufacturing cost of the deflector body 1 is relatively high.

[0058] Therefore, the distance from the first cover wall 11 to the heat insulation layer 2 on the inner wall of the second cover wall 12 is set to be slightly greater than the movement stroke of the exhaust valve 200. For example: the distance from the first cover wall 11 to the heat insulation layer 2 on the inner wall of the second cover wall 12 is greater than the movement stroke of the exhaust valve 200 by 5 - 10 mm.

[0059] In some embodiments, the deflector body 1 may further include two third cover walls 13 arranged oppositely along the width direction of the battery pack (refer to Figure 1 the Y-axis direction in

[0060] ). The third cover walls 13 are located between the first cover wall 11 and the second cover wall 12 and are connected to the first cover wall 11 and the second cover wall 12. Taking the deflector body 1 as a cuboid cavity as an example for illustration, the situation in other cases is similar and will not be elaborated here. The two third cover walls 13 are parallel to each other and are connected to the first cover wall 11 and the second cover wall 12. On the one hand, the arrangement of the two third cover walls 13 can increase the connection strength between the second cover wall 12 and the first cover wall 11, preventing the second cover wall 12 from breaking away from the first cover wall 11 due to factors such as vibration and foreign object impact; on the other hand, the arrangement of the two third cover walls 13 can prevent foreign objects from hitting the exhaust valve 200 in the direction of the connection line of the two third cover walls 13 (refer to Figure 1 the Y-axis direction in

[0061] In some embodiments, the third shroud wall 13 has a plurality of air outlets 1b, and the plurality of air outlets 1b are evenly distributed on the third shroud wall 13. Since the distance between other components of the vehicle and the exhaust valve 200 is relatively far in the Y-axis direction corresponding to the third shroud wall 13, the high-temperature and high-speed gas, electrolytic liquid, and dust released by the exhaust valve 200 are discharged to the external environment through the air outlets 1b on the third shroud wall 13. This can not only prevent other vehicle components (such as fuel tanks, high-voltage harnesses, etc.) arranged in the exhaust direction (i.e., the X-axis direction) of the exhaust valve 200 from being impacted by the high-temperature and high-speed gas and causing adverse phenomena such as fire, damage, and detachment, but also does not affect the normal operation of other vehicle components arranged in the direction corresponding to the third shroud wall 13 (i.e., the Y-axis direction).

[0062] In some embodiments, the diameter of the air outlet 1b is 3-5 millimeters. The battery pack is usually located at the chassis position of the vehicle, and the exhaust valve 200 is located in the direction opposite to the rear of the vehicle body 100. If the diameter of the air outlet 1b is relatively large, for example: 10-20 millimeters, when foreign objects in the external environment (such as stones and gravel on the road) splash, they may enter the hollow structure of the fairing body 1 and then impact and wear the exhaust valve 200; if the diameter of the air outlet 1b is relatively small, for example: 0.5-1 millimeter, it will cause a relatively large flow resistance of the high-temperature and high-speed gas released by the exhaust valve 200 to the air outlet 1b, which is not conducive to the timely discharge of the high-temperature and high-speed gas to the external environment.

[0063] In some embodiments, the fairing body 1 further includes two fourth shroud walls 14 that are oppositely arranged along the height direction of the battery pack (refer to Figure 1 the Z-axis direction in

[0064] ). The fourth shroud walls 14 are respectively connected to the first shroud wall 11 and the second shroud wall 12, and the fourth shroud walls 14 are not provided with openings. The two fourth shroud walls 14 are distributed along the height direction of the battery pack, that is, one fourth shroud wall 14 faces the ground, and the other fourth shroud wall 14 faces the cockpit. Among them, the fourth shroud wall 14 facing the ground is the position where the fairing body 1 is most likely to be impacted when foreign objects in the external environment (such as stones and gravel on the road) splash. The non-opening fourth shroud wall 14 can effectively reduce the possibility of foreign objects entering the hollow structure of the fairing body 1, thereby effectively protecting the exhaust valve 200. The non-opening fourth shroud wall 14 facing the cockpit can prevent the high-temperature and high-speed gas released by the exhaust valve 200 from spraying towards the cockpit direction, thereby reducing the harm of the high-temperature and high-speed gas to the cockpit and the personnel inside the cockpit.

[0065] In some embodiments, the fairing further includes an anti-corrosion layer 3, which is located on the outer surface of the fairing body 1 and is connected to the fairing body 1. The anti-corrosion layer 3 can prevent the fairing body 1 from directly contacting with foreign objects in the outside world, thereby avoiding scratches, holes, pits and other defects on the outer wall of the fairing body 1. It can also prevent the fairing body 1 from rusting and corroding due to moisture, acidic or alkaline liquids.

[0066] The present disclosure does not specifically limit the material of the anti-corrosion layer 3, which can be matched and set according to factors such as the environmental conditions, usage conditions of the fairing body 1, and the required anti-corrosion performance. For example: coating anti-corrosion materials (epoxy resin coatings, polyurethane coatings, acrylic coatings, etc.), coating anti-corrosion materials (anti-corrosion paints, anti-corrosion lacquers, etc.), plating anti-corrosion materials (zinc, tin, chromium, etc.).

[0067] Based on the same concept, with reference to Figure 3 As shown, the embodiments of the present disclosure further provide a battery pack, which may include a housing 100, an exhaust valve 200 located on the outer wall of the housing, and the fairing described in any one of the above embodiments. The air inlet 1a of the fairing body 1 is sleeved with the exhaust valve 200.

[0068] In this way, the high-temperature and high-speed gas, electrolytic liquid, and dust discharged by the exhaust valve 200 (hereinafter described by taking the high-temperature and high-speed gas as an example) enter the hollow structure of the fairing body 1 from the air inlet 1a, and then are transmitted to the external environment from the air outlet 1b. Since the air inlet direction of the air inlet 1a and the air outlet direction of the air outlet 1b are different, it is possible to prevent the high-temperature and high-speed gas discharged by the exhaust valve 200 from directly spraying onto other components such as the fuel tank and high-voltage harness without changing the direction, thereby causing damage or secondary ignition of other components, and further avoiding aggravating the safety risks of the vehicle and improving the protection ability for the cockpit personnel.

[0069] In the description of this specification, the description of reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0070] It can be understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0071] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0072] It can be further understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0073] It can be further understood that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be a direct connection without other components between the two, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0074] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring these operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be beneficial.

[0075] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are indicated by the scope of the claims.

[0076] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A deflector, characterized in that: The air deflector comprises an air deflector body (1) and a heat insulation layer (2); The air deflector body (1) has a hollow structure and is provided with an air inlet (1a) and an air outlet (1b); the air inlet (1a) is opposite to an exhaust valve of the battery pack; and the air inlet direction of the air inlet (1a) is different from the air outlet direction of the air outlet (1b); The heat insulation layer (2) is located at a position on the inner wall of the air deflector body (1) opposite to the air inlet (1a), and is connected to the air deflector body (1).

2. The air deflector according to claim 1, characterized in that: The total area of ​​the air outlet (1b) is greater than or equal to the flow area after the exhaust valve is opened.

3. The air deflector according to claim 1, characterized in that: The air deflector body (1) comprises a first cover wall (11) and a second cover wall (12) which are arranged opposite to each other, the first cover wall (11) having the air inlet (1a) and being connected to the shell of the battery pack, the inner wall of the second cover wall (12) being connected to the heat insulation layer (2), and the second cover wall (12) having no opening.

4. The air deflector according to claim 3, characterized in that: The distance between the first cover wall (11) and the heat insulation layer (2) on the inner wall of the second cover wall (12) is greater than the movement stroke of the exhaust valve.

5. The air deflector according to claim 3, characterized in that: The air duct body (1) further comprises two third hood walls (13) arranged opposite to each other along the width direction of the battery pack; the third hood wall (13) is located between the first hood wall (11) and the second hood wall (12), and is connected to the first hood wall (11) and the second hood wall (12).

6. The air deflector according to claim 5, characterized in that: The third cover wall (13) has a plurality of air outlets (1b), and the plurality of air outlets (1b) are evenly distributed on the third cover wall (13).

7. The air deflector according to claim 6, characterized in that: The diameter of the air outlet (1b) is 3-5 mm.

8. The air deflector according to claim 3, characterized in that: The air deflector body (1) further comprises two fourth cover walls (14) arranged opposite to each other along the height direction of the battery pack, the fourth cover walls (14) being respectively connected to the first cover wall (11) and the second cover wall (12), and the fourth cover wall (14) has no opening.

9. The air deflector according to any one of claims 1 to 8, characterized in that: The air duct cover further comprises an anti-corrosion layer (3), wherein the anti-corrosion layer (3) is located on the outer surface of the air duct cover body (1) and is connected to the air duct cover body (1).

10. A battery pack, characterized in that: The battery pack comprises a shell (100), an exhaust valve (200) located on the outer wall of the shell, and a shroud as claimed in any one of claims 1 to 9, wherein the exhaust valve (200) is sleeved on the air inlet (1a) of the shroud body (1).

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