Smoke exhaust flow guide cover, battery and electric equipment

Abstract

The utility model provides a smoke exhaust flow guide cover, a battery and electric equipment, and relates to the technical field of battery safety. The smoke exhaust flow guide cover comprises a cover plate, a first cover body and a second cover body. Wherein the cover plate is used for being connected with a battery pack in a sealing manner, and an anti-explosion valve port for accommodating the anti-explosion valve is formed in the cover plate; the first cover bodies are connected with the cover plate and correspond to the anti-explosion valve ports one to one, first smoke outlets are formed in the first cover bodies, and the first smoke outlets and the anti-explosion valve ports are arranged in a staggered mode; the second cover body is arranged on the side, connected with the first cover body, of the cover plate and covers the first cover body, a second smoke exhaust port is formed in the second cover body, and the second smoke exhaust port and the first smoke exhaust port are arranged in a staggered mode. By using the smoke exhaust guide cover in the battery, when the battery is in thermal runaway, the exhaust direction of smoke is changed, the exhaust distance is prolonged, the resistance is increased, and the flowing speed and temperature of the smoke are reduced, so that the smoke is not easy to generate open fire with other combustibles after being exhausted, and the damage to personnel and property is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery safety, in particular to a smoke exhaust fairing, a battery and an electric device. BACKGROUND

[0002] At present, the new energy industry is developing rapidly, and with the wide application of lithium ion batteries, the energy density of lithium batteries is also increasing. However, when the lithium battery is subjected to extrusion, needle puncture, external short circuit, internal short circuit, overcharge, overheating and the like, the battery will cause thermal runaway. When the battery is in thermal runaway, a large amount of high-temperature high-speed fluid will be generated, and even fire will occur, causing loss of personnel and property.

[0003] At present, the general solution to battery thermal runaway is to install one or more explosion-proof breather valves at one end or multiple ends of a single battery pack. When the battery cells in the battery pack are in thermal runaway due to some reasons, the high-temperature gas generated by the battery cells will reach the opening pressure of the explosion-proof breather valve, and the high-temperature gas will be discharged outside the battery pack through the explosion-proof breather valve.

[0004] However, when the thermal runaway gas is sprayed out of the explosion-proof breather valve, the sprayed high-temperature smoke and combustible material are easy to produce an open flame at the explosion-proof valve port. When the electric device is a new energy vehicle, if the explosion-proof breather valve port of the battery pack faces the passenger compartment, the sprayed high-temperature smoke and combustible material or even open flame will cause personal safety of the passengers. If there are other combustible materials near the explosion-proof breather valve port, the combustible materials will be ignited, causing a fire and huge property loss. CONTENT OF THE INVENTION

[0005] The present application provides a smoke exhaust fairing, a battery and an electric device to reduce the probability of an open flame being produced by high-temperature smoke generated by battery thermal runaway outside the explosion-proof valve, and reduce the damage to personnel and property.

[0006] In a first aspect, the present application provides a smoke exhaust fairing, comprising a cover plate, a first fairing body and a second fairing body. The cover plate is used for sealing connection with a battery pack, and the cover plate is provided with an explosion-proof valve port for accommodating an explosion-proof valve. The first fairing body is connected with the cover plate and corresponds to the explosion-proof valve port one by one, and the first fairing body is provided with a first smoke exhaust port, which is arranged in a staggered manner with the explosion-proof valve port. The second fairing body is arranged on one side of the cover plate connected with the first fairing body and covers the first fairing body, and the second fairing body is provided with a second smoke exhaust port, which is arranged in a staggered manner with the first smoke exhaust port.

[0007] The smoke exhaust fairing is installed on the battery pack, when the battery monomer in the battery pack is in thermal runaway, the high-temperature flue gas is first introduced into the first cover body after being sprayed from the explosion-proof valve, since the first smoke outlet is arranged in a staggered manner with the explosion-proof valve port, the flue gas will not be directly discharged from the first smoke outlet, but will collide on the inner wall of the first cover body, and then flow a certain distance in the first cover body before being discharged from the first smoke outlet; since the second smoke outlet is arranged in a staggered manner with the first smoke outlet, after the flue gas flows out from the first smoke outlet, it will collide on the inner wall of the second cover body, and then flow a certain distance in the second cover body before being finally discharged from the second smoke outlet. In the above process, the discharge direction of the flue gas changes, the discharge path lengthens, the resistance increases, and the flow speed and temperature of the flue gas are greatly reduced, so that the combustible material in the battery can be precipitated, so that the flue gas is not easy to produce an open fire with other combustible materials outside the second smoke outlet, thereby reducing the damage to personnel and property.

[0008] In a possible design, the first smoke outlet is located on the side of the first cover body away from the cover plate, and the second smoke outlet is perpendicular to the direction of the first smoke outlet.

[0009] Through the above scheme, on the basis of the first smoke outlet being arranged in a staggered manner with the explosion-proof valve port, the flue gas sprayed from the explosion-proof valve has a relatively high flow speed, and after colliding on the inner wall of the first cover body, it will flow back, that is, flow in the direction close to the cover plate. The first smoke outlet is located on the side of the first cover body away from the cover plate, which can lengthen the flow path of the flue gas in the first cover body and slow down the flow speed of the flue gas, so as to achieve the purpose of cooling the flue gas in the first cover body. Since the battery is usually arranged with the side of the explosion-proof valve facing the horizontal direction when it is installed in the electrical device, that is, the direction of the first smoke outlet is horizontal, which may be directly opposite the passenger cabin or other combustible materials, that is, if the flue gas is directly discharged from the first smoke outlet, it may cause damage to personnel or property. By arranging the second cover body and arranging the second smoke outlet perpendicular to the direction of the first smoke outlet, the direction of the flue gas sprayed from the second smoke outlet may be downward, so that the flue gas is further slowed down in the second cover body by the chimney effect, thereby reducing the safety hazard. At the same time, the direction of the flue gas sprayed from the second smoke outlet is downward, and the lower side usually does not directly face personnel or combustible materials, which further reduces the probability of producing an open fire due to thermal runaway and damaging personnel and property.

[0010] In a possible design, in any direction parallel to the cover plate, the first cover body includes a wide area, a narrow area, and a transition area between the wide area and the narrow area, the width of the wide area is greater than the width of the narrow area, and the width of the transition area gradually changes from the wide area to the narrow area. The explosion-proof valve port is opposite the wide area and / or the transition area, and the first smoke outlet is located in the narrow area; wherein the width refers to the size of the first cover body in the direction perpendicular to the cover plate.

[0011] By the above scheme, the explosion-proof valve is directly opposite the wide area and / or the transition area, so that the path that the flue gas needs to pass through in the process of being sprayed out of the explosion-proof valve and reaching the first smoke outlet becomes complex, and the flue gas flow direction changes greatly or the cross-sectional area changes greatly at the position where the flue gas flow is disturbed and air vortex is generated, so that the solid particles in the flue gas mainly settle and accumulate at the position, thereby reducing the amount of solid particles flowing out with the gas. Since the solid particles contain more combustible materials, reducing the flow of solid particles can reduce the probability of flue gas producing an open flame outside the second smoke outlet, thereby ensuring the safety of personnel and avoiding the combustion of other combustible materials and preventing the occurrence of a fire.

[0012] In a possible design, the first smoke outlet and the side wall away from the transition area of the narrow area have a preset distance, so that the side of the narrow area away from the transition area forms a settling area, and the settling area is used to collect the solid particles in the flue gas.

[0013] By the above scheme, a large amount of flue gas flows out of the first smoke outlet, and the air flow speed is relatively high. By making the first smoke outlet and the side wall away from the transition area of the narrow area have a preset distance, the solid particles in the settling area are not easy to flow out of the first smoke outlet with the flue gas, which is conducive to the collection of the solid particles in the settling area.

[0014] In a possible design, the side where the cover plate is located has a relief groove, and the relief groove is used to avoid the protruding structure on the battery pack.

[0015] By the above scheme, the side of the battery pack usually has a protruding structure such as a reinforcing rib. By providing the relief groove on the side where the cover plate of the smoke exhaust fairing is located, the interference of the protruding structure on the sealing connection between the cover plate and the side of the battery pack can be prevented, and the flue gas sprayed out of the explosion-proof valve can be effectively prevented from directly entering the air outside the smoke exhaust fairing to produce an open flame.

[0016] In a possible design, the side where the cover plate is located has a relief groove, and the relief groove is used to avoid the protruding structure on the battery pack.

[0017] By the above scheme, the high-temperature flue gas generated when the battery pack is in thermal runaway is sprayed out of the explosion-proof valve, the discharge direction of the flue gas changes in the smoke exhaust fairing, the discharge path becomes longer, the resistance increases, and the flow speed and temperature of the flue gas are greatly reduced, so that the flue gas is not easy to produce an open flame with other combustible materials outside the smoke exhaust fairing, thereby reducing the damage to personnel and property.

[0018] In a possible design, a sealing gasket is arranged between the cover plate and the first side to achieve the sealing connection between the cover plate and the first side.

[0019] By the above scheme, it is beneficial to further ensure the sealed connection between the cover plate and the first side surface of the battery pack, effectively preventing the smoke gas sprayed from the explosion-proof valve from directly entering the air outside the smoke exhaust fairing to cause open fire.

[0020] In a possible design, the shortest line connecting the edge of the first smoke exhaust port and the edge of the explosion-proof valve has an included angle with the plane where the end surface of the explosion-proof valve is located, and the included angle is less than or equal to 30°.

[0021] By the above scheme, the specific exhaust position of the smoke gas from the explosion-proof valve is generally the edge of the explosion-proof valve, and because the flow rate of the smoke gas is high when it is exhausted, the included angle between the exhaust direction and the plane where the end surface of the explosion-proof valve is located is about 30°. By setting the position of the first smoke exhaust port to meet the above setting, it can be prevented that the smoke gas sprayed from the edge of the explosion-proof valve is directly exhausted from the first smoke exhaust port, so that a large amount of smoke gas can be cooled and slowed down in the first fairing, further preventing the generation of open fire and the burning of personnel and articles.

[0022] In a third aspect, the application provides a power-using equipment, comprising a battery cabin and a battery in any of the above embodiments, wherein the battery is installed in the battery cabin.

[0023] By the above scheme, the use safety of the power-using equipment is improved, and it is not easy to cause open fire due to thermal runaway of the battery, causing injury to personnel and loss of articles.

[0024] In a possible design, in the use state of the power-using equipment, the second smoke exhaust port of the battery faces downward.

[0025] By the above scheme, there are generally no personnel and articles below the battery, and therefore, the installation and setting of the above battery in the power-using equipment can further improve the use safety of the power-using equipment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the smoke exhaust fairing in an embodiment of the application.

[0027] Figure 2 FIG. 2 is a schematic diagram of the exploded structure of the smoke exhaust fairing in an embodiment of the application.

[0028] Figure 3 FIG. 3 is a schematic diagram of the connection structure of part of the first fairing and the cover plate in an embodiment of the application.

[0029] Figure 4 FIG. 4 is a schematic diagram of the cross-sectional structure of A-A in FIG. 1. Figure 1

[0030] FIG. 5 is a schematic diagram of the enlarged structure at B in FIG. 4. Figure 5 Figure 4

[0031] ​​Figure 6 Figure 1 is a structural schematic diagram of a battery in an embodiment of the present application.

[0032] Label explanation: 100, smoke exhaust fairing; 110, cover plate; 111, explosion-proof valve port; 120, first cover body; 121, first smoke exhaust port; 122, wide area; 123, transition area; 124, narrow area; 125, settling area; 130, second cover body; 131, second smoke exhaust port; 140, avoidance groove; 200, battery pack; 300, explosion-proof valve. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification of the present application and the description of the drawings are intended to cover non-exclusive inclusion.

[0035] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing at various locations in the specification does not necessarily all refer to the same embodiments, nor does it necessarily refer to mutually exclusive or alternative embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] The term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of existence of A, existence of A and B, and existence of B. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0037] The orientation words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the smoke exhaust fairing, battery or electric device of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not intended to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0039] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, such as fixed connection by screw, bolt or other spacer; the physical connection can also be detachable connection, such as mutual clamping or clamping connection; the physical connection can also be integrally connected, such as welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The "connection" or "connection" of circuit structure can mean physical connection, electrical connection or signal connection, for example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, it can also be the internal connection of two elements; signal connection can be signal connection through circuit, or signal connection through media medium, such as radio wave. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The safety of the battery is particularly important during use, especially when used in new energy vehicles. However, in recent years, new energy vehicles have caught fire due to battery thermal runaway, and when the vehicle catches fire, it is easy to cause burns to personnel or burn loss of articles, causing certain personnel or property losses to the user.

[0042] In the related art, the target is generally focused on how to reduce battery thermal runaway. However, despite this, the situation of battery thermal runaway is difficult to completely avoid. In this case, how to further reduce the chain reaction after thermal runaway and reduce the damage of thermal runaway to personnel and property becomes particularly important.

[0043] The inventors found that the battery in the related art generally has an explosion-proof valve. When the battery has thermal runaway, high-temperature flue gas is sprayed from the explosion-proof valve port and is easy to produce an open flame when encountering a combustible material, thereby burning personnel or burning articles. Therefore, one way to prevent damage to personnel or articles is to reduce the probability of flue gas sprayed from the explosion-proof valve producing an open flame.

[0044] Therefore, the present application provides a smoke exhaust fairing, as shown in Figure 1 、 Figure 2 River Figure 3 The smoke exhaust fairing 100 includes a cover plate 110, a first cover body 120, and a second cover body 130. The cover plate 110 is used to be sealingly connected with a battery pack, and the cover plate 110 is provided with an explosion-proof valve port 111 for accommodating an explosion-proof valve 300; the first cover body 120 is connected with the cover plate 110 and corresponds to the explosion-proof valve port 111 one-to-one, and the first cover body 120 is provided with a first smoke exhaust port 121, which is arranged in a staggered manner with the explosion-proof valve port 111; the second cover body 130 is arranged on one side of the cover plate 110 connected with the first cover body 120 and covers the first cover body 120, and the second cover body 130 is provided with a second smoke exhaust port 131, which is arranged in a staggered manner with the first smoke exhaust port 121.

[0045] The cover plate 110, the first cover body 120, and the second cover body 130 can be high-temperature-resistant metal or non-metal parts, such as steel plates, iron plates, mica sheets, etc. When the cover plate 110, the first cover body 120, and the second cover body 130 are metal parts, they can be connected by welding to ensure the sealing of the connection of the three.

[0046] The first cover body 120 and the second cover body 130 are both shell-shaped parts with inner cavities. After the first cover body 120 is connected with the cover plate 110, a first space for smoke flow is formed between the cover plate 110 and the first cover body 120. When the second cover body 130 is arranged at one side of the cover plate 110 connected with the first cover body 120, a second space for smoke flow is formed between the second cover body 130 and the cover plate 110, and meanwhile, the first cover body 120 is located in the second space.

[0047] It can be understood that, in order to ensure that the smoke can flow along a specified path on the smoke exhaust flow guide cover 100 to achieve the purpose of speed reduction and temperature reduction, the rest of the smoke exhaust flow guide cover 100 is sealed except the specified explosion-proof valve port 111, the first smoke exhaust port 121 and the second smoke exhaust port 131.

[0048] In the embodiment of the present application, the misalignment setting refers to a non-orthogonal state.

[0049] When the cover plate 110 is sealingly connected with the battery pack, and the explosion-proof valve port 111 on the cover plate 110 is sleeved on the explosion-proof valve 300 on the battery pack, after the explosion-proof valve 300 is triggered, the high-temperature smoke will not flow out along the gap between the cover plate 110 and the battery pack 200, but can only enter the smoke exhaust flow guide cover 100 through the explosion-proof valve port 111.

[0050] In the smoke exhaust flow guide cover 100, the high-temperature smoke first enters the first cover body 120. Since the first smoke exhaust port 121 and the explosion-proof valve port 111 are misaligned, the smoke will not directly flow out from the first smoke exhaust port 121, but will collide with the inner wall of the first cover body 120 and flow a certain distance in the first cover body 120 before flowing out from the first smoke exhaust port 121. Since the second smoke exhaust port 131 and the first smoke exhaust port 121 are misaligned, after the smoke flows out from the first smoke exhaust port 121, it will collide with the inner wall of the second cover body 130 and flow a certain distance in the second cover body 130 before finally flowing out from the second smoke exhaust port 131. In the above process, the discharge direction of the smoke changes, the discharge distance becomes longer, the resistance increases, and the flow speed and temperature of the smoke are greatly reduced, so that it is not easy to produce an open flame with other combustible materials outside the second smoke exhaust port 131, reducing the damage to personnel and property.

[0051] For example, in a test experiment, the smoke exhaust fairing 100 is installed on the battery pack according to the above requirements, and it is measured that the smoke gas with a temperature as high as about 300° sprayed from the explosion-proof valve 300 has a temperature of about 130° after passing through the smoke exhaust fairing 100 at the second smoke outlet 131, and the flow rate of the smoke gas is also reduced from 42 m / s (meters per second) near the explosion-proof valve 300 to 1.5 m / s at the second smoke outlet 131. It can be seen that after the smoke exhaust fairing 100 of the above embodiment of the present application is installed on the battery pack 200, the flow rate and temperature of the smoke gas generated by thermal runaway are greatly reduced, thereby greatly reducing the probability of generating an open flame.

[0052] As shown in Figure 4 In a possible design, the first smoke outlet 121 is located on the side of the first cover body 120 away from the cover plate 110, and the second smoke outlet 131 is oriented perpendicular to the first smoke outlet 121.

[0053] For example, the cover plate 110 is located on the left side of the first cover body 120, and the first smoke outlet 121 is located on the right side wall of the first cover body 120; the first smoke outlet 121 is oriented in the left-right direction, and the second smoke outlet 131 is oriented in the up-down direction or the front-back direction.

[0054] The first smoke outlet 121 and the second smoke outlet 131 can be of any shape, for example, the first smoke outlet 121 can be circular, oval, square, etc., and the second smoke outlet 131 can be in gas communication with the first smoke outlet 121 one by one, or one second smoke outlet 131 can be in gas communication with multiple first smoke outlets 121 at the same time. In the embodiments shown in the drawings of the present application, an example of one second smoke outlet 131 being in gas communication with multiple first smoke outlets 121 at the same time is shown.

[0055] Through the above scheme, on the basis of the first smoke outlet 121 being misaligned with the explosion-proof valve port 111, the smoke gas sprayed from the explosion-proof valve 300 has a relatively fast flow rate, and after colliding on the inner wall of the first cover body 120, it will flow back, that is, flow towards the cover plate 110. The first smoke outlet 121 is located on the side of the first cover body 120 away from the cover plate 110, which can lengthen the flow path of the smoke gas in the first cover body 120, and at the same time slow down the flow rate of the smoke gas, so as to achieve the purpose of cooling the smoke gas in the first cover body 120.

[0056] Since the battery is installed in the electrical device, the side of the explosion-proof valve 300 is usually arranged to face the horizontal direction, that is, the first smoke outlet 121 faces the horizontal direction, which can be directly opposite the passenger cabin or other flammable materials, that is, if the smoke is directly discharged from the first smoke outlet 121, it can cause damage to personnel or property. By arranging the second cover 130, and the direction of the second smoke outlet 131 is perpendicular to the direction of the first smoke outlet 121, so that after the smoke is sprayed from the second smoke outlet 131, the direction can be downward, so that the high-temperature smoke is further reduced in speed in the second cover 130 by using the chimney effect, reducing the safety hazard, at the same time, the direction of the smoke sprayed from the second smoke outlet 131 is downward, and the lower side usually does not directly face personnel or flammable materials, further reducing the probability of heat runaway producing open fire and damaging personnel and property.

[0057] As shown in Figure 5 In a possible design, in any direction parallel to the cover plate 110, the first cover 120 includes a wide area 122, a narrow area 124, and a transition area 123 between the wide area 122 and the narrow area 124, the width of the wide area 122 is greater than the width of the narrow area 124, and the width of the transition area 123 gradually changes from the wide area 122 to the narrow area 124, the explosion-proof valve port 111 is opposite the wide area 122 and / or the transition area 123, and the first smoke outlet 121 is located in the narrow area 124; wherein the width refers to the size of the first cover 120 in the direction perpendicular to the cover plate 110, and Figures 1-4 In the drawings, the width direction refers to the X direction.

[0058] In any direction parallel to the cover plate 110, the size of the wide area 122, the narrow area 124, and the transition area 123 can be any value greater than 0. For example, the cross-sectional shape of the first cover 120 in a plane perpendicular to the cover plate 110 is similar to a boot shape, the space of the "boot cylinder" part is the wide area 122, the space of the "sole" part corresponds to the narrow area 124, and the space of the part connecting the boot cylinder and the sole corresponds to the transition area 123.

[0059] The explosion-proof valve port 111 is opposite the wide area 122 and / or the transition area 123, that is, the explosion-proof valve port 111 can be opposite the wide area 122, opposite the transition area 123, partially opposite the wide area 122, and partially opposite the transition area 123, which is not limited by the embodiments of the present application.

[0060] Since the "width" in the above scheme refers to the dimension of the first cover body 120 in the direction perpendicular to the cover plate 110, and obviously, in the direction perpendicular to the cover plate 110, one side boundary of the first cover body 120 is the cover plate 110, therefore, the change of the width of the first cover body 120 is formed by the change of the shape of the side wall of the first cover body 120 away from the side of the cover plate 110, which is the first possible "collision" side wall of the flue gas after being ejected at high speed from the explosion-proof valve 300, therefore, the change of the shape of the side wall will directly disturb the flow direction of the flue gas, so that the disturbance and the air flow vortex occur at the position where the flow direction of the flue gas changes greatly or the cross-sectional area changes greatly.

[0061] The above structure makes the path that the flue gas needs to pass through in the process of reaching the first smoke outlet 121 become complex, especially at the position where the disturbance and the air flow vortex occur, the solid particles in the flue gas can be greatly settled and accumulated, thereby reducing the amount of solid particles discharged with the gas, and the solid particles contain more combustible materials, therefore, reducing the outflow of solid particles can reduce the probability of producing an open flame of the flue gas outside the second smoke outlet 131, ensure the safety of personnel and avoid the combustion of other combustible materials, prevent the occurrence of fire.

[0062] Please continue to refer to Figure 5 In a possible design, the first smoke outlet 121 and the side wall of the narrow region 124 away from the transition region 123 have a preset distance a, so that the side of the narrow region 124 away from the transition region 123 forms a settling region 125, and the settling region 125 is used to collect the solid particles in the flue gas.

[0063] The preset distance a can be any distance greater than 0, for example, the preset distance a can be 2-8 cm.

[0064] Through the above scheme, a large amount of flue gas flows out of the first smoke outlet 121, and the air flow velocity is large, by making the first smoke outlet 121 and the side wall of the narrow region 124 away from the transition region 123 have a preset distance, the probability that the solid particles settled in the settling region 125 are taken out of the first smoke outlet 121 by the gas can be reduced, so that the solid particles in the settling region 125 are not easy to flow out of the first smoke outlet 121 with the flue gas, which is beneficial to the collection of the solid particles by the settling region 125.

[0065] It can be understood that the orientation of the settling area 125 on the first cover 120 is the same as the orientation of the second smoke outlet 131, and when the smoke deflector 100 is installed on the battery pack 200, and the battery composed of the smoke deflector 100 and the battery pack 200 is installed on the vehicle, the settling area 125 and the second smoke outlet 131 are both oriented downward, thereby facilitating the settlement of solid particles in the flue gas in the settling area 125 under the action of gravity, and also facilitating the further reduction of the speed of the flue gas ejected from the second smoke outlet 131 under the action of the chimney effect.

[0066] Please refer to Figure 1 , Figure 2 Figure 4 and Figure 6 In a possible design, the side where the cover plate 110 is located has an avoidance groove 140 for avoiding the protruding structure on the battery pack 200.

[0067] Through the above scheme, the side of the battery pack 200 usually has a reinforcing rib and other protruding structures, and by providing the avoidance groove 140 on the side of the cover plate 110 on the smoke deflector 100, the interference of the protruding structure on the sealing connection of the cover plate 110 and the side of the battery pack 200 can be prevented, and the direct entry of the flue gas ejected from the explosion-proof valve 300 into the air outside the smoke deflector 100 to cause a fire can be effectively prevented.

[0068] It can be understood that the periphery of the avoidance groove 140 is in a sealing connection state with the cover plate 110 or the first cover 120, so as to ensure that the flue gas can only enter the smoke deflector 100 from the explosion-proof valve port 111, and can only flow out of the smoke deflector 100 from the second smoke outlet 131.

[0069] For example, in some embodiments, the peripheral wall of the avoidance groove 140 is configured as an integral baffle, the baffle is a profile pre-processed and formed, and the peripheral circle of the baffle is sealingly connected with the first cover 120, the second cover 130 or the cover plate 110 at the corresponding position, so as to prevent the flue gas in the second cover 130 from leaking from the peripheral circle of the baffle.

[0070] Specifically, the baffle can be pre-processed and formed by machining or stamping, as long as the shape of the baffle can be adapted to the shape of the protruding structure on the side of the battery pack 200 to be matched, so as to at least achieve the purpose of accommodating the protruding structure.

[0071] For example, in some embodiments, the peripheral wall of the avoidance groove 140 is configured as an integral baffle, the baffle is a profile pre-processed and formed, and the peripheral circle of the baffle is sealingly connected with the first cover 120, the second cover 130 or the cover plate 110 at the corresponding position, so as to prevent the flue gas in the second cover 130 from leaking from the peripheral circle of the baffle. Figure 4 and Figure 6In the shown orientation, the smoke exhaust fairing 100 is installed on the right side surface of the battery pack 200 as an example, the cover plate 110 is the leftmost wall of the smoke exhaust fairing 100, the cover plate 110 is attached to the right side surface of the battery pack 200, at the same time, the right side surface of the battery pack 200 is provided with nine explosion-proof valves 300, the cover plate 110 is provided with nine explosion-proof valve openings 111 corresponding to the nine explosion-proof valves 300, and the explosion-proof valve openings 111 are correspondingly sleeved on the explosion-proof valves 300. The cover plate 110 and the second cover body 130 form a cavity structure, and the cavity structure is opened below to form a second smoke exhaust opening 131. The first cover body 120 is located in the cavity structure, and the number and position of the first cover body 120 are one-to-one corresponding to the explosion-proof valve openings 111. The first cover body 120 includes a wide area 122, a transition area 123 and a narrow area 124 from top to bottom, the explosion-proof valve opening 111 is opposite to the transition area 123, and the first smoke exhaust opening 121 is located on the wall on the right side of the first cover body 120. The first smoke exhaust opening 121 has a predetermined distance from the lower side wall of the first cover body 120, so that the bottom of the first cover body 120 forms a settling area 125.

[0072] When thermal runaway occurs, the smoke gas is sprayed from the edge of the explosion-proof valve 300, collides on each side wall of the first cover body 120, and under the disturbance of the special shape of the first cover body 120, the smoke gas forms a vortex under the backflow, so that the speed of the smoke gas is reduced. The solid particles (such as broken pole pieces, substance particles in electrolyte, etc.) in the smoke gas are attached and settled due to the slowing down of the smoke gas flow rate and the collision with the inner wall of the first cover body 120, and fall downward to the settling area 125 under the action of gravity, so that the solid particles in the smoke gas discharged from the first smoke exhaust opening 121 are reduced. After the smoke gas is discharged from the first smoke exhaust opening 121, the space outside the first cover body 120 is larger than the space inside the first cover body 120, so the flow rate of the smoke gas will quickly decrease. At the same time, since the second smoke exhaust opening 131 is located below the smoke exhaust fairing 100, the smoke gas flows downward outside the first cover body 120 (inside the second cover body 130). In this process, due to the chimney effect, the flow rate of the smoke gas is slowed down again, the solid particles are settled again, and the temperature of the airflow is reduced again. When the smoke gas flows out from the second smoke exhaust opening 131, the temperature and flow rate of the smoke gas are greatly reduced, and the amount of solid particles carried in the smoke gas is greatly reduced, and the possibility of combustion and fire occurring at the second smoke exhaust opening 131 is greatly reduced.

[0073] Please continue to refer to Figure 6 The application also provides a battery comprising a battery pack 200 and a smoke exhaust fairing 100 according to any one of the above embodiments, wherein the first side surface of the battery pack 200 is provided with an explosion-proof valve, and the smoke exhaust fairing 100 is arranged on the side where the explosion-proof valve is located; wherein the cover plate 110 is sealingly connected with the first side surface, and the explosion-proof valve opening 111 is sleeved on the outer periphery of the explosion-proof valve 300.

[0074] In the battery structure, the battery pack 200 can specifically include a battery management system (BMS) and a plurality of battery cells. The plurality of battery cells can be electrically connected in series, in parallel, or in a mixed manner of series and parallel, and are in communication connection with the battery management system to form the battery pack 200. The battery management system controls and monitors the working state of each battery cell. In addition, the plurality of battery cells can be first connected in series and / or in parallel, and form a battery module with the module management system. Then, a plurality of battery modules are electrically connected in series, in parallel, or in a mixed manner of series and parallel, and are in common connection with the battery management system to form the battery pack 200.

[0075] The plurality of battery cells in the battery pack 200 or the battery module can be mounted on a support structure such as a box, a frame, a bracket, etc. The plurality of battery cells and the battery management system can be electrically connected through a busbar. The battery cells can be lithium ion batteries, sodium ion batteries, or magnesium ion batteries, and can have a cylindrical, flat, cuboid, or other shape.

[0076] The battery pack 200 can have a generally cuboid shape, and one or more explosion-proof valves 300 are concentrated on a first side of the battery pack 200.

[0077] By connecting the smoke exhaust fairing 100 on the first side of the battery pack 200, the high-temperature smoke generated by the thermal runaway of the battery pack 200 is ejected from the explosion-proof valve 300. In the smoke exhaust fairing 100, the direction of the smoke exhaust changes, the exhaust path becomes longer, the resistance increases, and the flow speed and temperature of the smoke are greatly reduced, so that it is not easy to produce an open flame with other combustible materials outside the smoke exhaust fairing 100, thereby reducing damage to personnel and property.

[0078] In one possible design, a sealing gasket is arranged between the cover plate 110 and the first side to achieve a sealed connection between the cover plate 110 and the first side.

[0079] The sealing gasket can be made of rubber, silicone, or other materials with elasticity and high temperature resistance.

[0080] Optionally, the sealing gasket is arranged at least around the explosion-proof valve port 111, so as to prevent the high-temperature smoke ejected from the explosion-proof valve from leaking from any position around the explosion-proof valve.

[0081] By arranging the sealing gasket, the sealed connection between the cover plate 110 and the first side of the battery pack 200 is further ensured, and the smoke ejected from the explosion-proof valve 300 is effectively prevented from directly entering the air outside the smoke exhaust fairing 100 to produce an open flame.

[0082] Please refer to Figure 5In a possible design, an included angle b between a shortest line connecting an edge of the first smoke outlet 121 and an edge of the explosion-proof valve 300 and a plane where an end surface of the explosion-proof valve 300 is located is less than or equal to 30°.

[0083] For example, the included angle b can be 10°, 25°, 30°, or the like.

[0084] According to the above scheme, the specific smoke outlet position of the explosion-proof valve 300 is generally the edge of the explosion-proof valve 300, and because the flow rate of the smoke gas is high when the smoke gas is discharged, the included angle between the discharge direction and the plane where the end surface of the explosion-proof valve 300 is located is about 30°. By setting the position of the first smoke outlet 121 as described above, it can be ensured that the smoke gas sprayed from the edge of the explosion-proof valve 300 is not directly discharged from the first smoke outlet 121, so that a large amount of smoke gas can be cooled and slowed down in the first cover 120, and the generation of open flames and the burning of personnel and objects are further prevented.

[0085] In a third aspect, the present application provides a battery for a battery compartment of an electric device.

[0086] According to the above scheme, because the battery in the above embodiment is used, the safety of the electric device is improved, and open flames caused by thermal runaway of the battery are less likely to occur, so that the harm to personnel and the loss of objects are reduced.

[0087] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement device, an elevator, a lifting device, or the like. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, or the like. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, or the like. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, or an electric airplane toy, or the like. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, or the like. The energy storage device can be an energy storage wall, a base station energy storage, a container energy storage, or the like. The amusement device can be a carousel, a jump machine, or the like. The present application does not specially limit the electric device.

[0088] In a possible design, in a use state of the electric device, the second smoke outlet 131 of the battery faces downward.

[0089] Through the above scheme, for the electric equipment with fixed direction in use, there is generally no personnel and articles below the battery, and therefore, the installation of the battery in the electric equipment can further improve the use safety of the electric equipment.

[0090] To sum up, the smoke exhaust fairing 100, the battery and the electric equipment provided by the embodiments of the present application, by installing the smoke exhaust fairing 100 on the battery pack 200, when the battery monomer in the battery pack 200 occurs thermal runaway, the high-temperature flue gas is first introduced into the first cover body 120 and then introduced into the second cover body 130 after being sprayed from the explosion-proof valve 300, and finally discharged from the second smoke exhaust port 131. In the above process, the discharge direction of the flue gas changes, the discharge path becomes longer, the resistance increases, the flow speed and temperature of the flue gas are greatly reduced, and the combustible in the flue gas is precipitated, so that the flue gas is not easy to produce a fire with other combustibles outside the second smoke exhaust port 131, reducing the damage to personnel and property.

Claims

1. A smoke exhaust hood, characterized in that, include: A cover plate for sealing connection with the battery pack, the cover plate being provided with an explosion-proof valve port for accommodating an explosion-proof valve; The first cover is connected to the cover plate and corresponds one-to-one with the explosion-proof valve port. The first cover is provided with a first smoke exhaust port, which is offset from the explosion-proof valve port. The second cover is located on the side of the cover plate that connects to the first cover and covers the first cover inside. The second cover is provided with a second smoke exhaust port, which is offset from the first smoke exhaust port.

2. The smoke exhaust hood according to claim 1, characterized in that, The first smoke vent is located on the side of the first hood away from the cover plate, and the orientation of the second smoke vent is perpendicular to the orientation of the first smoke vent.

3. The smoke exhaust hood according to claim 2, characterized in that, In any direction parallel to the cover plate, the first cover includes a wide area, a narrow area, and a transition area between the wide area and the narrow area. The width of the wide area is greater than the width of the narrow area. The width of the transition area gradually changes from the wide area to the narrow area. The explosion-proof valve port is directly opposite the wide area and / or the transition area. The first smoke exhaust port is located in the narrow area. The width refers to the dimension of the first cover in the direction perpendicular to the cover plate.

4. The smoke exhaust hood according to claim 3, characterized in that, The first exhaust port is at a predetermined distance from the side wall of the narrow section away from the transition zone, so that a settling zone is formed on the side of the narrow section away from the transition zone, and the settling zone is used to collect solid particles in the flue gas.

5. The smoke exhaust hood according to claim 1, characterized in that, The cover plate has a clearance groove on its side, which is used to avoid protruding structures on the battery pack.

6. A battery, characterized in that, The device includes a battery pack and a smoke exhaust hood as described in any one of claims 1 to 5, wherein an explosion-proof valve is provided on a first side of the battery pack, and the smoke exhaust hood is provided on the side where the explosion-proof valve is located; The cover plate is sealed to the first side, and the explosion-proof valve port is sleeved on the outer periphery of the explosion-proof valve.

7. The battery according to claim 6, characterized in that, A sealing gasket is provided between the cover plate and the first side to achieve a sealed connection between the cover plate and the first side.

8. The battery according to claim 6, characterized in that, The angle between the shortest line connecting the edge of the first smoke exhaust port and the edge of the explosion-proof valve and the plane containing the end face of the explosion-proof valve is less than or equal to 30°.

9. An electrical appliance, characterized in that, It includes a battery compartment and the battery as described in claim 7 or 8, wherein the battery is installed within the battery compartment.

10. The electrical equipment according to claim 9, characterized in that, When the electrical equipment is in use, the second exhaust port of the battery faces downwards.

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