Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a box body, at least one battery monomer assembly and at least one mixed gas cover. The box body is provided with an exhaust structure and a receiving space. The exhaust structure comprises a plurality of first exhaust holes arranged at intervals. The first exhaust holes are arranged on the inner wall of the box body. The battery monomer assembly is arranged in the receiving space. The mixed gas cover is arranged outside the box body. The mixed gas cover is provided with a mixed gas cavity, an air inlet and an air outlet. The mixed gas cavity is used for receiving flue gas exhausted through the exhaust structure. The air inlet and the air outlet are both communicated with the external environment. The mixed gas cavity is communicated with the air inlet and the air outlet. According to the battery device, the flue gas exhausted through the exhaust structure is mixed with the air entering through the air inlet in the mixed gas cavity. The concentration of solid particles in the flue gas is reduced. The concentration of the flue gas finally exhausted through the air outlet is reduced. The probability of causing a safety secondary accident is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] When the battery device experiences thermal runaway, it rapidly generates a large amount of high-temperature mixed flue gas. The high-pressure flue gas is directly ejected at high speed from the pressure relief port, and a large amount of white smoke is concentrated and emitted instantaneously. White smoke and dust are scattered in all directions, posing a risk of sudden drop in visibility and high concentration of combustible gas, which may lead to secondary safety accidents. Therefore, improvements are needed. Utility Model Content

[0003] In view of the above problems, this application provides a battery device and an electrical device that can effectively reduce the concentration of the discharged mixed flue gas and reduce the probability of causing secondary safety accidents.

[0004] In a first aspect, this application provides a battery device, including a housing, at least one set of battery cell assemblies, and at least one mixing hood. The housing is provided with an exhaust structure and a receiving space. The exhaust structure includes a plurality of spaced-apart first exhaust holes, which are disposed on the inner wall of the housing. The battery cell assemblies are disposed within the receiving space. The mixing hood is located outside the housing and is provided with a mixing chamber, an air inlet, and an exhaust outlet. The mixing chamber is used to receive flue gas discharged through the exhaust structure. The air inlet and the exhaust outlet are both in communication with the external environment, and the mixing chamber connects the air inlet and the exhaust outlet.

[0005] In the above technical solution, the flue gas discharged from the exhaust structure is mixed with the air entering through the air inlet in the mixing chamber, reducing the concentration of solid particles in the flue gas and thus reducing the final concentration of the flue gas discharged from the exhaust port, thereby reducing the probability of secondary safety accidents. By setting multiple spaced first exhaust holes on the inner wall of the housing, the multiple first exhaust holes can release the flue gas pressure accumulated in the housing simultaneously and at multiple points, preventing the formation of a high-speed jet of fire due to concentrated pressure release from a single hole. Multi-point diversion weakens the instantaneous impact force of the flue gas, reducing the probability of scouring and high-temperature ablation damage caused by the flue gas directly hitting the local area of ​​the mixing hood, and extending the service life of the mixing hood. The multiple spaced first exhaust holes divide the entire thick smoke into multiple thin streams and disperse them into the mixing chamber, greatly increasing the contact area between the thin stream flue gas and the air flowing in through the air inlet, and making the air and high-temperature particulate flue gas mix more thoroughly.

[0006] In some embodiments, the ratio of the sum of the cross-sectional areas of the plurality of first exhaust holes to the cross-sectional area of ​​the corresponding air inlet is 1:100 to 1:1000.

[0007] In the above technical solution, the cross-sectional area of ​​the multiple first exhaust holes is much smaller than the cross-sectional area of ​​the corresponding air inlet, so that the gas entering the air inlet can reduce the concentration of solid particles and combustible gases in the flue gas discharged from the first exhaust holes, thereby reducing the probability of secondary safety accidents such as re-ignition upon contact with an open flame or dust explosion.

[0008] In some embodiments, the cross-sectional area of ​​a single first exhaust port is 1 mm. 2 ~20mm 2 .

[0009] In the above technical solution, the cross-sectional area of ​​a single first exhaust hole is 1 mm. 2 ~20mm 2 This not only allows the flue gas inside the chamber to be discharged, reducing the probability of a single first exhaust port being blocked, but also breaks down the overall flue gas into multiple fine streams, increasing the contact area between the flue gas and the air, and achieving more thorough mixing in the mixing chamber.

[0010] In some embodiments, the battery device further includes a first seal mounted on the inner wall of the housing and covering the first vent hole, the first seal being configured to open the first vent hole by at least one of melting, decomposition, movement and rupture.

[0011] In the above technical solution, the first sealing element improves the sealing performance of the housing when thermal runaway does not occur; when thermal runaway occurs, the first exhaust port is opened by at least one of melting, decomposition, movement and rupture, so that the flue gas can be discharged.

[0012] In some embodiments, the first seal is a decomposable sealing membrane.

[0013] In the above technical solution, the first sealing element is a decomposable sealing film. The decomposable sealing film can decompose during thermal runaway, opening the first exhaust port so that the flue gas can be discharged. At the same time, the decomposable sealing film has a simple overall structure and is thin and light, which is conducive to the lightweighting and miniaturization of the battery device.

[0014] In some embodiments, the decomposition temperature of the first seal is 200°C to 400°C.

[0015] In the above technical solution, the decomposition temperature of the first seal is 200℃~400℃, which corresponds to the initial temperature when thermal runaway occurs. This allows the first seal to open the first exhaust port in the initial stage of thermal runaway, thereby venting the smoke and reducing the probability of the housing exploding.

[0016] In some embodiments, the decomposable sealing film is a polyethylene film, a polypropylene film, or an ethylene-vinyl acetate copolymer film.

[0017] In the above technical solution, the decomposable sealing film is made of polyethylene film, polypropylene film or ethylene-vinyl acetate copolymer film, which can decompose during thermal runaway, open the first exhaust port and allow the flue gas to be discharged; at the same time, it is thin and light, and the decomposition temperature corresponds to the initial temperature of thermal runaway.

[0018] In some embodiments, the housing includes a housing sidewall, the housing sidewall includes a first wall and a second wall, a protective cavity is formed between the first wall and the second wall, the second wall is located on the side of the protective cavity near the receiving space, the first vent is disposed on the second wall, and the venting structure further includes a second vent, the second vent is disposed on the first wall.

[0019] In the above technical solution, the side wall of the box includes a first wall and a second wall, forming a double-wall structure, which makes the overall structure of the box stronger and significantly improves its explosion resistance; a protective cavity is formed between the first wall and the second wall, which buffers the impact of high-temperature flue gas and reduces the probability of flue gas being directly injected into the mixing hood.

[0020] In some embodiments, the battery device further includes a second seal that passes through the second vent hole and is configured to open the second vent hole in a movable manner.

[0021] In the above technical solution, when thermal runaway does not occur, the second seal blocks the second exhaust port, forming a double seal on the housing. When thermal runaway occurs, the second seal opens the second exhaust port, allowing the flue gas to be discharged.

[0022] In some embodiments, the second seal includes a limiting end and a sealing portion connected to the limiting end, the limiting end being located on the side of the first wall away from the protective cavity and abutting against the first wall, and at least a portion of the sealing portion being located in the second vent hole and abutting against the hole wall of the second vent hole.

[0023] In the above technical solution, the limiting end is located on the side of the first wall away from the protective cavity and abuts against the first wall. During assembly, it can limit the depth of the sealing part extending into the second vent hole and reduce the probability of the second seal falling into the protective cavity during installation. At least part of the sealing part is located in the second vent hole to seal the second vent hole.

[0024] In some embodiments, the cross-sectional area of ​​the seal decreases in the direction from the first wall to the second wall.

[0025] In the above technical solution, the cross-sectional area of ​​the sealing part is reduced in the direction from the first wall to the second wall. When the second seal is installed with the second vent hole, the sealing part can play a guiding role; at the same time, it reduces the probability of the second seal getting stuck when opening the second vent hole.

[0026] In some embodiments, the battery device further includes an adsorption element disposed within the protective cavity, the adsorption element being used to adsorb solid particles in the flue gas.

[0027] In the above technical solution, the adsorbent adsorbs solid particles in the flue gas, reduces the concentration of solid particles in the flue gas, and reduces the probability of secondary safety accidents.

[0028] In some embodiments, the area within the protective cavity not filled with the adsorption element forms an airflow channel, and the second exhaust port faces the airflow channel.

[0029] In the above technical solution, the second exhaust port faces the airflow channel, reducing the probability of the adsorption component blocking the second exhaust port and allowing the flue gas to be discharged smoothly.

[0030] In some embodiments, a portion of the first exhaust port faces the adsorption member, and a portion of the first exhaust port faces the airflow channel.

[0031] In the above technical solution, part of the first exhaust port faces the adsorption element, and the flue gas discharged from part of the first exhaust port is filtered by the adsorption element to reduce the concentration of solid particles in the flue gas. Part of the first exhaust port faces the airflow channel so that part of the flue gas can be discharged directly from the airflow channel, reducing the probability of poor flue gas discharge.

[0032] In some embodiments, the ratio of the length of the adsorption element to the length of the airflow channel along the length of the cross-section of the protective cavity ranges from 4 to 8.

[0033] In the above technical solution, the ratio of the length of the adsorption element to the length of the airflow channel is in the range of 4 to 8, which allows some flue gas to be discharged directly from the airflow channel, reducing the probability of poor flue gas discharge; and allows most of the flue gas to be filtered by the adsorption element, reducing the concentration of solid particulate matter in the flue gas.

[0034] In some embodiments, the adsorbent comprises porous activated carbon, vermiculite, or porous ceramic.

[0035] In the above technical solutions, porous activated carbon, vermiculite, or porous ceramics are all loose and porous materials with a large number of interconnected pores inside. When flue gas passes through the packing, the airflow resistance is small and it will not significantly obstruct the flow of flue gas; all of them can effectively adsorb solid particulate matter.

[0036] In some embodiments, the side wall of the housing is provided with the exhaust structure, the side or top of the mixing hood is provided with the air inlet, and the bottom of the mixing hood is provided with the exhaust outlet.

[0037] In the above technical solution, the air inlet is set on the side or top of the mixing hood, so that the cold air outside sinks. The exhaust structure is set on the side wall of the box. The exhaust gas discharged by the exhaust structure has a high temperature and mixes fully with the sinking cold air during the rising process. Then it is discharged through the exhaust port at the bottom, which enhances the mixing effect.

[0038] In some embodiments, the number of mixing hoods is one, and the mixing hood is disposed outside the housing to receive flue gas discharged via all of the exhaust structures; or, the number of mixing hoods is multiple, and the multiple mixing hoods are spaced apart and installed on the outer periphery of the housing, and each mixing hood receives flue gas discharged via a portion of the exhaust structures.

[0039] In the above technical solution, when there is only one mixing hood, the number of battery device components is small and the assembly is simple; when there are multiple mixing hoods, each mixing hood receives part of the flue gas discharged from the exhaust structure, making the flue gas more uniformly mixed; when a single mixing hood is slightly blocked or damaged, only the exhaust structure is affected, and the other mixing hoods can still normally receive the flue gas and complete the dilution and emission.

[0040] In some embodiments, the battery device further includes a turbulence-disrupting component located within the mixing chamber.

[0041] In the above technical solution, the turbulence component is located inside the mixing chamber to improve the mixing effect of air and flue gas.

[0042] In some embodiments, the turbulence assembly is located at the end of the mixing chamber near the exhaust port.

[0043] In the above technical solution, the turbulence component is located at the end of the mixing chamber near the exhaust port. The airflow must pass through the turbulence component before reaching the exhaust port, and the flow path is disrupted, which further improves the mixing effect.

[0044] In some embodiments, the spoiler assembly includes at least one spoiler, one end of which is connected to the mixing hood, and the other end of which is spaced apart from the inner wall of the mixing hood to form a vent.

[0045] In the above technical solution, a spoiler is used to turbulent the airflow. The spoiler has a simple structure. The other end of the spoiler is separated from the inner wall of the mixing hood to form an air vent, maintaining a sufficient flue gas flow area.

[0046] In some embodiments, the number of spoilers is multiple, and the multiple spoilers are spaced apart in the direction from the exhaust structure to the exhaust port.

[0047] In the above technical solution, multiple baffles are spaced apart in the direction from the exhaust structure to the exhaust port, so that the flue gas is turbulent multiple times during the exhaust process, thereby improving the mixing effect of flue gas and air; the baffles can also intercept some solid particles, and the solid particles are deposited on the surface of the baffles, reducing the concentration of solid particles in the flue gas.

[0048] In some embodiments, in the direction from the exhaust structure to the exhaust port, the vents at the other ends of two adjacent spoilers are staggered.

[0049] In the above technical solution, the air inlets at the other ends of two adjacent baffles are staggered, so that the flue gas can meander and bypass during the discharge process, extending the mixing path and improving the mixing effect.

[0050] Secondly, the present invention provides an electrical device, including a battery device according to an embodiment of the first aspect of the present invention.

[0051] In the above technical solution, the electrical device includes a battery device according to the first aspect of the present invention. The flue gas discharged from the exhaust structure is mixed with the air entering through the air inlet in the mixing chamber, thereby reducing the concentration of solid particles in the flue gas and reducing the concentration of the flue gas finally discharged from the exhaust port, thus reducing the probability of causing secondary safety accidents.

[0052] In some embodiments, the electrical device is a vehicle, the vehicle including a chassis, the chassis having an installation space. The enclosure is installed in the installation space, and part of the chassis constitutes the gas mixing hood; Alternatively, the battery device is installed in the installation space, and the side of the chassis is provided with a gas inlet, which connects the air intake to the external environment; the bottom of the chassis is provided with a gas outlet, which connects the exhaust port to the external environment.

[0053] In the above technical solutions, the chassis portion forms a mixing hood, saving space and components; or the battery device is installed in the chassis mounting space, the chassis isolates the battery device from the vehicle interior, and the diluted smoke is directly discharged to the bottom of the vehicle, away from the vehicle interior wiring harnesses and pipes, and will not flow back into the vehicle interior, reducing the probability of high concentration smoke accumulation causing secondary thermal runaway.

[0054] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0055] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the battery device according to the first embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the battery device; Figure 3 for Figure 2 Enlarged view of battery device A; Figure 4 This is a partial perspective view of the electrical device according to the second embodiment of the present utility model; Figure 5 for Figure 4 A three-dimensional view of the battery device of an electrical device; Figure 6 for Figure 5 A cross-sectional view of the battery device; Figure 7 for Figure 6 Enlarged view of battery device B; Figure 8 for Figure 7 A perspective view of the second seal of the battery device; Figure 9 for Figure 4 A cross-sectional view of an electrical appliance; Figure 10 for Figure 9 Enlarged view of point C of the battery device; Figure 11 This is a schematic diagram of an electrical device according to some embodiments of the present invention.

[0056] Figure label: 1000. Electrical appliances; 100. Battery device; 10. Box body; 11. Reception space; 12. Box body side wall; 120. First wall; 121. Second wall; 13. Protective cavity; 14. First exhaust port; 15. Second exhaust port; 16. Exhaust structure; 17. Airflow channel; 20. Battery cell modules; 30. First seal; 40. Second seal; 41. Limiting end; 42. Insert rod; 43. Sealing part; 50. Adsorption components; 60. Mixing hood; 61. Mixing chamber; 62. Air inlet; 63. Exhaust outlet; 64. Main body; 65. Air inlet section; 650. Air inlet channel; 70. Spoiler assembly; 71. Spoiler plate; 72. Vent; 73. Flow channel; 200. Chassis; 201. Main body; 202. Seat crossbeam; 203. Gas inlet; 204. Gas outlet; 205. Installation space. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0059] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0060] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0063] In this utility model, "multiple" refers to two or more.

[0064] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this application.

[0065] In the embodiments of this utility model, unless otherwise specified, all embodiments and optional embodiments of this utility model can be combined with each other to form new technical solutions.

[0066] In the embodiments of this utility model, unless otherwise specified, all technical features and optional technical features of this utility model can be combined with each other to form new technical solutions.

[0067] In embodiments of this invention, the battery device may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0068] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by fixing the battery modules to the housing; alternatively, multiple individual battery cells can be housed within the housing by directly fixing them to the housing.

[0069] In embodiments of this application, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0070] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0071] When a battery device experiences thermal runaway, it rapidly generates a large amount of high-temperature mixed flue gas, which is then ejected at high speed directly from the pressure relief port. In related technologies, the high-temperature mixed flue gas generated by the thermal runaway of the battery device is directly discharged, with a flammable concentration far exceeding the explosive limit. After being discharged, it is highly susceptible to ignition upon contact with high road surface temperatures, brake sparks, wiring harnesses, and plastic parts, and may even cause dust / flammable gas deflagration. The high-temperature mixed flue gas contains a large number of solid particles, reducing visibility and easily causing secondary safety accidents.

[0072] To reduce the probability of secondary safety accidents, this application provides a battery device, including a housing, at least one set of battery cell assemblies, and at least one mixing hood. The housing is provided with an exhaust structure and a receiving space. The battery cell assemblies are disposed within the receiving space. The mixing hood is located outside the housing and is provided with a mixing chamber, an air inlet, and an exhaust outlet. The mixing chamber is used to receive flue gas discharged through the exhaust structure. Both the air inlet and the exhaust outlet are connected to the external environment, and the mixing chamber connects the air inlet and the exhaust outlet.

[0073] In the above technical solution, the flue gas discharged from the exhaust structure is mixed with the air entering through the air inlet in the mixing chamber, which reduces the concentration of solid particles in the flue gas, thereby reducing the concentration of the flue gas finally discharged from the exhaust port and reducing the probability of causing secondary safety accidents.

[0074] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] The electrical devices disclosed in this application can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery device to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this application, the battery device can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0076] The following is for reference. Figures 1-11 This invention describes a battery device and an electrical device according to embodiments of the present invention.

[0077] refer to Figures 1-3 In a first aspect, this utility model provides a battery device 100, including a housing 10, at least one set of battery cell assemblies 20, and at least one mixing hood 60. The housing 10 is provided with an exhaust structure 16 and a receiving space 11. The battery cell assemblies 20 are disposed within the receiving space 11. The exhaust structure 16 includes a plurality of spaced-apart first exhaust holes 14, which are disposed on the inner wall of the housing 10 (see reference). Figure 7 The mixing hood 60 is located outside the housing 10. The mixing hood 60 is provided with a mixing chamber 61, an air inlet 62 and an exhaust outlet 63. The mixing chamber 61 is used to receive the flue gas discharged through the exhaust structure 16. The air inlet 62 and the exhaust outlet 63 are both connected to the external environment. The mixing chamber 61 connects the air inlet 62 and the exhaust outlet 63.

[0078] The housing 10 is used to install the battery cell assembly 20 and to protect the battery cell assembly 20.

[0079] For example, multiple first vent holes 14 are evenly spaced on the inner wall of the housing 10. Each first vent hole 14 is a round hole.

[0080] The battery cell assembly 20 is the smallest energy storage unit that constitutes the battery device 100. The core is assembled from battery cells and supporting accessories. Multiple battery cell assemblies 20 are arranged in the housing space 11 of the housing 10 to form a complete battery device 100.

[0081] The mixing hood 60 can be made of metal, which can withstand the scouring of flue gas at temperatures of over 1,000 degrees Celsius during thermal runaway. It will not melt or collapse and can maintain the integrity of the mixing chamber 61 for a long time, reducing the probability of the mixing hood 60 deforming and blocking the exhaust passage, so that the flue gas can be discharged smoothly and continuously.

[0082] For example, when thermal runaway does not occur, the exhaust structure 16 is closed and the containment space 11 is not connected to the mixing chamber 61. When thermal runaway occurs, the exhaust structure 16 is opened and the containment space 11 is connected to the mixing chamber 61. The flue gas generated by the battery cell assembly 20 is discharged from the exhaust structure 16 to the mixing chamber 61.

[0083] In the above technical solution, the flue gas discharged from the exhaust structure 16 is mixed with the air entering from the air inlet 62 in the mixing chamber 61, reducing the concentration of solid particles in the flue gas, thus reducing the concentration of the flue gas finally discharged from the exhaust port 63 and reducing the probability of causing secondary safety accidents. By setting multiple spaced first exhaust holes 14 on the inner wall of the housing 10, the multiple spaced first exhaust holes 14 can release the flue gas pressure accumulated in the housing 10 simultaneously and at multiple points, preventing the formation of a high-speed jet of fire due to concentrated pressure release from a single hole. Multi-point diversion weakens the instantaneous impact force of the flue gas, reducing the probability of scouring and high-temperature ablation damage caused by the flue gas directly hitting the local area of ​​the mixing hood 60, and extending the service life of the mixing hood 60. The multiple spaced first exhaust holes 14 divide the entire thick smoke into multiple thin streams and disperse them into the mixing chamber 61. The contact area between the thin stream flue gas and the air flowing in from the air inlet 62 is greatly increased, and the air and the high-temperature particulate flue gas are mixed more thoroughly.

[0084] See Figure 7 In some embodiments, the ratio of the sum of the cross-sectional areas of the plurality of first exhaust ports 14 to the cross-sectional area of ​​the corresponding air inlet 62 is 1:100 to 1:1000.

[0085] The corresponding air inlet 62 refers to the air inlet 62 that is connected to multiple first exhaust ports 14.

[0086] See Figure 3 In the first embodiment, there is one air inlet 62, which is connected to all the first exhaust holes 14. The ratio of the sum of the cross-sectional areas of the multiple first exhaust holes 14 to the cross-sectional area of ​​the corresponding air inlet 62 is 1:100 to 1:1000, which means that the ratio of the sum of the cross-sectional areas of all the first exhaust holes 14 to the cross-sectional area of ​​the air inlet 62 is 1:100 to 1:1000.

[0087] See Figure 5 In the second embodiment, there are multiple mixing hoods 60, and each mixing hood 60 is provided with an air inlet 62. The air inlet 62 is connected to multiple first exhaust holes 14 corresponding to the mixing hood 60. The ratio of the sum of the cross-sectional areas of the multiple first exhaust holes 14 to the cross-sectional area of ​​the corresponding air inlet 62 is 100 to 1000, which means that the ratio of the sum of the cross-sectional areas of the multiple first exhaust holes 14 connected to the air inlet 62 to the cross-sectional area of ​​the air inlet 62 is 1:100 to 1:1000.

[0088] The ratio of the sum of the cross-sectional areas of the multiple first exhaust ports 14 to the cross-sectional area of ​​the corresponding air inlet 62 is 1:100 to 1:1000, which means that the ratio range is any value in the above range, such as 1:100, 1:200, 1:300, 1:400, 1:500, 1:600, 1:700, 1:800, 1:900 or 1:1000.

[0089] In the above technical solution, the cross-sectional area of ​​the multiple first exhaust holes 14 is much smaller than the cross-sectional area of ​​the corresponding air inlet 62, so that the gas entering the air inlet 62 can reduce the concentration of solid particles and combustible gases in the flue gas discharged from the first exhaust holes 14, thereby reducing the probability of secondary safety accidents such as re-ignition upon contact with an open flame or dust explosion.

[0090] See Figure 7 In some embodiments, the cross-sectional area of ​​a single first exhaust port 14 is 1 mm. 2 ~20mm 2 .

[0091] The first exhaust port 14 can be a circular port.

[0092] The cross-sectional area of ​​a single first exhaust port 14 is 1 mm. 2 ~20mm 2 This indicates that the cross-sectional area of ​​a single first exhaust port 14 can be any value within the aforementioned range, for example: 1 mm. 2 5mm 2 10mm 2 15mm 2 Or 20mm 2 .

[0093] In the above technical solution, the cross-sectional area of ​​a single first exhaust hole 14 is 1 mm. 2 ~20mm 2 This not only allows the flue gas inside the housing 10 to be discharged, reducing the probability of the single first exhaust port 14 being blocked, but also breaks down the overall flue gas into multiple fine streams, increasing the contact area between the flue gas and the air, and achieving more thorough mixing in the mixing chamber 61.

[0094] See Figure 7 In some embodiments, the battery device 100 further includes a first seal 30, which is mounted on the inner wall of the housing 10 and covers the first vent 14. The first seal 30 is configured to open the first vent 14 by at least one of melting, decomposition, movement and rupture.

[0095] In the above technical solution, the first sealing element 30 improves the sealing performance of the housing 10 when thermal runaway does not occur; when thermal runaway occurs, the first exhaust port 14 is opened by at least one of melting, decomposition, movement and rupture, so that the flue gas can be discharged.

[0096] See Figure 7 In some embodiments, the first seal 30 is a decomposable sealing film.

[0097] In the above technical solution, the first sealing element 30 is a decomposable sealing film. The decomposable sealing film can decompose during thermal runaway, opening the first exhaust port 14 so that the flue gas can be discharged. At the same time, the decomposable sealing film has a simple overall structure and is thin and light, which is conducive to the lightweighting and miniaturization of the battery device.

[0098] In some embodiments, the decomposition temperature of the first seal 30 is 200°C to 400°C.

[0099] The decomposition temperature of the first seal 30 is 200℃~400℃, which means that the decomposition temperature of the first seal 30 can be any value in the above range, such as 200℃, 250℃, 300℃, 350℃ or 400℃.

[0100] In the above technical solution, the decomposition temperature of the first seal 30 is 200℃~400℃, which corresponds to the initial temperature when thermal runaway occurs. This allows the first seal 30 to open the first exhaust port 14 in the initial stage of thermal runaway to discharge the smoke and reduce the probability of the housing 10 exploding.

[0101] In some embodiments, the decomposable sealing film may be a polyethylene film, a polypropylene film, or an ethylene-vinyl acetate copolymer film.

[0102] In the above technical solution, the decomposable sealing membrane is made of polyethylene film, polypropylene film or ethylene-vinyl acetate copolymer film, which can decompose during thermal runaway, opening the first exhaust port 14 to allow the flue gas to be discharged; at the same time, it is thin and light, and the decomposition temperature corresponds to the initial temperature of thermal runaway.

[0103] See Figure 7In some embodiments, the housing 10 includes a housing side wall 12, which includes a first wall 120 and a second wall 121. A protective cavity 13 is formed between the first wall 120 and the second wall 121. The second wall 121 is located on the side of the protective cavity 13 near the receiving space 11. A first vent 14 is disposed on the second wall 121. The venting structure 16 also includes a second vent 15, which is disposed on the first wall 120.

[0104] For example, the first wall 120 and the second wall 121 can be parallel to each other.

[0105] In the above technical solution, the side wall 12 of the box includes a first wall 120 and a second wall 121, forming a double-wall structure. The overall structural strength of the box 10 is higher and the explosion resistance is significantly improved. A protective cavity 13 is formed between the first wall 120 and the second wall 121. The protective cavity 13 buffers the impact of high-temperature flue gas and reduces the probability of direct injection of flue gas into the mixing hood 60.

[0106] See Figure 7 In some embodiments, the battery device 100 further includes a second seal 40 that passes through the second vent 15 and is configured to open the second vent 15 by means of movement.

[0107] For example, when thermal runaway occurs, the battery cell assembly 20 generates smoke, which flows into the protective cavity 13, increasing the air pressure inside the protective cavity 13. The air pressure acts on the second seal 40, and the second seal 40 is pushed away from the second vent 15 by the air pressure, thereby opening the second vent 15.

[0108] In the above technical solution, when thermal runaway does not occur, the second seal 40 blocks the second exhaust port 15, so that the housing 10 forms a double seal. When thermal runaway occurs, the second seal 40 opens the second exhaust port 15, so that the flue gas can be discharged.

[0109] See Figures 7-8 In some embodiments, the second seal 40 includes a limiting end 41 and a sealing portion 43 connected to the limiting end 41. The limiting end 41 is located on the side of the first wall 120 away from the protective cavity 13 and abuts against the first wall 120. At least a portion of the sealing portion 43 is located in the second vent hole 15 and abuts against the hole wall of the second vent hole 15.

[0110] For example, the second seal 40 may further include a plug-in rod 42 extending from the limiting end 41 near the protective cavity 13, with the sealing portion 43 surrounding the plug-in rod 42. The cross-sectional area of ​​the limiting end 41 is larger than the cross-sectional area of ​​the sealing portion 43. The cross-section of the limiting end 41 may be circular.

[0111] In the above technical solution, the limiting end 41 is located on the side of the first wall 120 away from the protective cavity 13 and abuts against the first wall 120. During assembly, it can limit the depth of the sealing part 43 extending into the second exhaust hole 15 and reduce the probability of the second seal 40 falling into the protective cavity 13 during installation. At least a portion of the sealing part 43 is located in the second exhaust hole 15 and abuts against the hole wall of the second exhaust hole 15 to seal the second exhaust hole 15.

[0112] See Figures 7-8 In some embodiments, the cross-sectional area of ​​the sealing portion 43 is reduced in the direction from the first wall 120 to the second wall 121.

[0113] The sealing part 43 can be conical.

[0114] In the above technical solution, the cross-sectional area of ​​the sealing part 43 is reduced in the direction from the first wall 120 to the second wall 121. When the second sealing member 40 is installed with the second exhaust hole 15, the sealing part 43 can play a guiding role; at the same time, it reduces the probability of the second sealing member 40 getting stuck when opening the second exhaust hole 15.

[0115] See Figure 7 In some embodiments, the battery device 100 further includes an adsorption element 50 disposed within the protective cavity 13, which is used to adsorb solid particles in the flue gas.

[0116] In the above technical solution, the adsorbent 50 adsorbs solid particles in the flue gas, reduces the concentration of solid particles in the flue gas, and reduces the probability of secondary safety accidents.

[0117] See Figure 7 In some embodiments, the area within the protective cavity 13 not filled with the adsorption member 50 forms an airflow channel 17, and the second exhaust port 15 faces the airflow channel 17.

[0118] In the above technical solution, the second exhaust port 15 faces the airflow channel 17, which reduces the probability that the adsorption component 50 will block the second exhaust port 15, so that the flue gas can be discharged smoothly.

[0119] See Figure 7 In some embodiments, a portion of the first exhaust port 14 faces the adsorption member 50, and a portion of the first exhaust port 14 faces the airflow channel 17.

[0120] In the above technical solution, some of the first exhaust holes 14 face the adsorption element 50, and the flue gas discharged from some of the first exhaust holes 14 is filtered by the adsorption element 50 to reduce the concentration of solid particles in the flue gas. Some of the first exhaust holes 14 face the airflow channel 17 so that some of the flue gas can be discharged directly from the airflow channel 17, reducing the probability of poor flue gas discharge.

[0121] See Figure 7 In some embodiments, the ratio of the length of the adsorption member 50 to the length of the airflow channel 17 along the length of the cross-section of the protective cavity 13 is in the range of 4 to 8.

[0122] The ratio of the length of the adsorption element 50 to the length of the airflow channel 17 is in the range of 4 to 8, and the ratio can be any value within the above range. For example, it can be 4, 5, 6, 7 or 8.

[0123] In the above technical solution, the ratio of the length of the adsorption element 50 to the length of the airflow channel 17 is in the range of 4 to 8, which allows some flue gas to be discharged directly from the airflow channel 17, reducing the probability of poor flue gas discharge; and allows most of the flue gas to be filtered by the adsorption element 50, reducing the concentration of solid particulate matter in the flue gas.

[0124] In some embodiments, the adsorbent 50 includes porous activated carbon, vermiculite, or porous ceramic.

[0125] In the above technical solutions, porous activated carbon, vermiculite, or porous ceramics are all loose and porous materials with a large number of interconnected pores inside. When flue gas passes through the packing, the airflow resistance is small and it will not significantly obstruct the flow of flue gas; all of them can effectively adsorb solid particulate matter.

[0126] See Figure 3 In some embodiments, the side wall of the housing 10 is provided with an exhaust structure 16, the side or top of the mixing hood 60 is provided with an air inlet 62, and the bottom of the mixing hood 60 is provided with an exhaust outlet 63.

[0127] For example, both the air inlet 62 and the exhaust outlet 63 can be rectangular.

[0128] In the above technical solution, the air inlet 62 is located on the side or top of the mixing hood 60, so that the cold air outside sinks. The exhaust structure 16 is located on the side wall of the box 10. The exhaust gas discharged by the exhaust structure 16 has a high temperature and mixes fully with the sinking cold air during the rising process. Then it is discharged through the exhaust port 63 at the bottom, which enhances the mixing effect.

[0129] In some embodiments, see Figures 1-3 The number of mixing hoods 60 is one, and the mixing hood 60 is installed outside the housing 10 to receive the flue gas discharged through the entire exhaust structure 16; or, see [reference]. Figures 4-6 There are multiple mixing hoods 60, which are installed at intervals on the outer periphery of the housing 10. Each mixing hood 60 receives the flue gas discharged through the partial exhaust structure 16.

[0130] In the above technical solution, when there is only one mixing hood 60, the number of parts of the battery device 100 is small and the assembly is simple; when there are multiple mixing hoods 60, each mixing hood 60 receives part of the flue gas discharged from the exhaust structure 16, making the flue gas more uniformly mixed; when a single mixing hood 60 is slightly blocked or damaged, only the exhaust structure 16 is affected, and the other mixing hoods 60 can still normally receive the flue gas and complete the dilution and emission.

[0131] See Figure 9 as well as Figure 10 In some embodiments, the battery device 100 further includes a turbulence assembly 70 located within the mixing chamber 61.

[0132] In the above technical solution, the turbulence component 70 is located inside the mixing chamber 61 to improve the mixing effect of air and flue gas.

[0133] See Figure 9 as well as Figure 10 In some embodiments, the turbulence assembly 70 is located at the end of the mixing chamber 61 near the exhaust port 63.

[0134] In the above technical solution, the turbulence component 70 is located at the end of the mixing chamber 61 near the exhaust port 63. The airflow must pass through the turbulence component 70 before reaching the exhaust port 63, and the flow path is disrupted, which further improves the mixing effect.

[0135] See Figure 9 as well as Figure 10 In some embodiments, the spoiler assembly 70 includes at least one spoiler 71, one end of which is connected to the mixing hood 60, and the other end of which is spaced apart from the inner wall of the mixing hood 60 to form a vent 72.

[0136] For example, the length of the vent 72 is less than the length of the spoiler 71.

[0137] In the above technical solution, a baffle plate 71 is used for turbulence. The baffle plate 71 has a simple structure. The other end of the baffle plate 71 is spaced apart from the inner wall of the mixing hood 60 to form a vent 72, maintaining a sufficient flue gas flow area.

[0138] See Figure 9 as well as Figure 10 In some embodiments, there are multiple spoilers 71, which are spaced apart in the direction from the exhaust structure 16 to the exhaust port 63.

[0139] For example, multiple spoilers 71 are parallel to each other. A flow channel 73 is formed between two adjacent spoilers 71.

[0140] In the above technical solution, multiple baffles 71 are spaced apart in the direction from the exhaust structure 16 to the exhaust port 63, so that the flue gas is turbulent multiple times during the exhaust process, thereby improving the mixing effect of flue gas and air; the baffles 71 can also intercept some solid particles, and the solid particles are deposited on the surface of the baffles 71, thereby reducing the concentration of solid particles in the flue gas.

[0141] See Figure 9 as well as Figure 10 In some embodiments, in the direction from the exhaust structure 16 to the exhaust port 63, the vents 72 corresponding to the other ends of two adjacent spoilers 71 are staggered.

[0142] In the above technical solution, the air inlets 72 at the other ends of two adjacent baffles 71 are staggered, so that the flue gas can bend and bypass during the discharge process, extending the mixing path and improving the mixing effect.

[0143] See Figure 11 Secondly, the present invention provides an electrical device 1000, including a battery device 100 according to an embodiment of the first aspect of the present invention.

[0144] In the above technical solution, the electrical device 1000 uses a battery device 100 according to the first aspect of the present invention. The flue gas discharged from the exhaust structure 16 is mixed with the air entering from the air inlet 62 in the mixing chamber 61, which reduces the concentration of solid particles in the flue gas and reduces the concentration of flue gas finally discharged from the exhaust port 63, thereby reducing the probability of causing secondary safety accidents.

[0145] See Figure 11 In some embodiments, the electrical device 1000 is a vehicle, which includes a chassis 200, a mounting space 205, and a housing 10 mounted in the mounting space 205. A portion of the chassis 200 forms a mixing hood 60.

[0146] For example: See Figure 1 The chassis 200 includes a main body 201 and a seat crossbeam 202 mounted on top of the main body 201. The main body 201 has an installation space 205. The housing 10 is installed in the installation space 205 and located below the seat crossbeam 202. The seat crossbeam 202 has high structural strength and protects the housing 10. An air inlet 62 is provided on the side of the main body 201, and an exhaust outlet 63 is provided at the bottom of the main body 201.

[0147] Or, see Figure 9 as well as Figure 10 The battery device 100 is installed in the installation space 205. The side of the chassis 200 is provided with a gas inlet 203, which connects the air inlet 62 to the external environment. The bottom of the chassis 200 is provided with a gas outlet 204, which connects the exhaust port 63 to the external environment.

[0148] For example, the mixing hood 60 includes a main body 64 and an air intake 65 connected to the main body 64. An air intake channel 650 is formed inside the air intake 65, and an air intake port 62 is formed at the top of the air intake 65. An exhaust port 63 is formed at the bottom of the main body 64.

[0149] In the above technical solution, part of the chassis 200 forms a mixing hood 60, saving space and components; or the battery device 100 is installed in the installation space 205 of the chassis 200, the chassis 200 isolates the battery device 100 from the vehicle interior, the diluted smoke is directly discharged to the bottom of the vehicle, away from the wiring harness and pipeline inside the vehicle, and will not flow back into the vehicle interior, reducing the probability of high concentration smoke accumulation causing secondary thermal runaway.

[0150] The following reference Figures 1-11 A battery device 100 according to some embodiments of the present invention is described.

[0151] Figures 1-3 In the first embodiment of this application, the battery device 100 includes a housing 10, at least one set of battery cell assemblies 20, and at least one mixing hood 60. The housing 10 is provided with an exhaust structure 16 and a receiving space 11. The battery cell assembly 20 is disposed in the receiving space 11. The mixing hood 60 is located outside the housing 10 and is provided with a mixing chamber 61, an air inlet 62, and an exhaust outlet 63. The mixing chamber 61 is used to receive the flue gas discharged from the exhaust structure 16. The air inlet 62 and the exhaust outlet 63 are both in communication with the external environment. The mixing chamber 61 connects the air inlet 62 and the exhaust outlet 63.

[0152] The exhaust structure 16 includes a plurality of spaced-apart first exhaust holes 14, which are located on the inner wall of the housing 10. A mixing hood 60 is provided, and is part of the chassis 200. An air inlet 62 is located on the side of the chassis 200, and an exhaust outlet 63 is located at the bottom of the chassis 200. The mixing hood 60 covers the outside of the housing 10 and receives all the exhaust gases discharged from the exhaust structure 16. The ratio of the sum of the cross-sectional areas of the plurality of first exhaust holes 14 to the cross-sectional area of ​​the corresponding air inlet 62 is 1:100 to 1:1000. The cross-sectional area of ​​a single first exhaust hole 14 is 1 mm². 2 ~20mm 2 .

[0153] The battery device 100 also includes a first seal 30, which is installed on the inner wall of the housing 10 and covers the first vent 14. The first seal 30 is configured to open the first vent 14 by at least one of melting, decomposition, movement, and rupture. The first seal 30 is a degradable sealing film, which is a polyethylene film, a polypropylene film, or an ethylene-vinyl acetate copolymer film. The decomposition temperature of the first seal 30 is 200°C to 400°C.

[0154] The enclosure 10 includes an enclosure side wall 12, which includes a first wall 120 and a second wall 121. A protective cavity 13 is formed between the first wall 120 and the second wall 121. The second wall 121 is located on the side of the protective cavity 13 closer to the receiving space 11. A first exhaust port 14 is disposed on the second wall 121. The exhaust structure 16 also has a second exhaust port 15, which is disposed on the first wall 120.

[0155] The battery assembly 100 also includes a second seal 40, which passes through the second vent 15 and is configured to open the second vent 15 by means of movement. The second seal 40 includes a limiting end 41 and a sealing portion 43 connected to the limiting end 41. The limiting end 41 is located on the side of the first wall 120 opposite to the protective cavity 13 and abuts against the first wall 120. At least a portion of the sealing portion 43 is located in the second vent 15. The cross-sectional area of ​​the sealing portion 43 decreases in the direction from the first wall 120 to the second wall 121.

[0156] The battery device 100 also includes an adsorbent 50 disposed within the protective cavity 13. The adsorbent 50 is used to adsorb solid particles in the flue gas. The area within the protective cavity 13 not filled with the adsorbent 50 forms an airflow channel 17, with the second exhaust port 15 facing the airflow channel 17. A portion of the first exhaust port 14 faces the adsorbent 50, and a portion of the first exhaust port 14 faces the airflow channel 17. Along the length of the cross-section of the protective cavity 13, the ratio of the length of the adsorbent 50 to the length of the airflow channel 17 ranges from 4 to 8. The adsorbent 50 is porous activated carbon, vermiculite, or porous ceramic.

[0157] The battery device 100 also includes a baffle assembly 70 located within the mixing chamber 61. The baffle assembly 70 is located at the end of the mixing chamber 61 near the exhaust port 63. The baffle assembly 70 includes at least one baffle plate 71, one end of which is connected to the mixing shroud 60, and the other end of which is spaced apart from the inner wall of the mixing shroud 60 to form a vent 72. Multiple baffle plates 71 are arranged at intervals in the direction from the exhaust structure 16 to the exhaust port 63. In the direction from the exhaust structure 16 to the exhaust port 63, the vents 72 corresponding to the other ends of two adjacent baffle plates 71 are staggered.

[0158] Please continue reading. Figures 4 to 10 This is the second embodiment of the present application. In the second embodiment, the structure of the battery device 100 is roughly the same as that of the first embodiment, except that there are multiple mixing hoods 60, which are spaced apart and installed on the outer periphery of the housing 10. Each mixing hood 60 receives part of the flue gas discharged from the exhaust structure 16. The battery device 100 is installed in the installation space 205. The side of the chassis 200 is provided with a gas inlet 203, which connects to the air inlet 62 and the external environment. The bottom of the chassis 200 is provided with a gas outlet 204, which connects to the exhaust port 63 and the external environment.

[0159] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0160] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: The enclosure is provided with an exhaust structure and a receiving space. The exhaust structure includes a plurality of spaced-apart first exhaust holes, which are disposed on the inner wall of the enclosure. At least one set of battery cell components is disposed within the receiving space; At least one mixing hood is located outside the housing. The mixing hood is provided with a mixing chamber, an air inlet, and an exhaust outlet. The mixing chamber is used to receive flue gas discharged through the exhaust structure. The air inlet and the exhaust outlet are both in communication with the external environment. The mixing chamber connects the air inlet and the exhaust outlet.

2. The battery device according to claim 1, characterized in that, The ratio of the sum of the cross-sectional areas of the plurality of first exhaust holes to the cross-sectional area of ​​the corresponding air inlet is 1:100 to 1:1000.

3. The battery device according to claim 1, characterized in that, The cross-sectional area of ​​a single first exhaust port is 1 mm. 2 ~20mm 2 .

4. The battery device according to claim 1, characterized in that, The battery device further includes a first seal, which is installed on the inner wall of the housing and covers the first vent hole. The first seal is configured to open the first vent hole by at least one of melting, decomposition, movement, and rupture.

5. The battery device according to claim 4, characterized in that, The first seal is a decomposable sealing film; and / or, the decomposition temperature of the first seal is 200℃~400℃.

6. The battery device according to claim 5, characterized in that, The decomposable sealing film is a polyethylene film, a polypropylene film, or an ethylene-vinyl acetate copolymer film.

7. The battery device according to claim 1, characterized in that, The enclosure includes a side wall, which includes a first wall and a second wall. A protective cavity is formed between the first wall and the second wall. The second wall is located on the side of the protective cavity closer to the receiving space. The first vent is disposed on the second wall. The venting structure also includes a second vent, which is disposed on the first wall.

8. The battery device according to claim 7, characterized in that, The battery device further includes a second seal that passes through the second vent hole and is configured to open the second vent hole by means of movement.

9. The battery device according to claim 8, characterized in that, The second seal includes a limiting end and a sealing portion connected to the limiting end. The limiting end is located on the side of the first wall away from the protective cavity and abuts against the first wall. At least a portion of the sealing portion is located in the second vent hole and abuts against the hole wall of the second vent hole.

10. The battery device according to claim 9, characterized in that, The cross-sectional area of ​​the sealing portion decreases in the direction from the first wall to the second wall.

11. The battery device according to claim 7, characterized in that, The battery device further includes an adsorption element disposed inside the protective cavity, which is used to adsorb solid particles in the flue gas.

12. The battery device according to claim 11, characterized in that, The area within the protective cavity not filled with the adsorption element forms an airflow channel, and the second exhaust port faces the airflow channel.

13. The battery device according to claim 12, characterized in that, Part of the first exhaust port faces the adsorption element, and part of the first exhaust port faces the airflow channel; And / or, along the length of the cross-section of the protective cavity, the ratio of the length of the adsorption element to the length of the airflow channel ranges from 4 to 8.

14. The battery device according to claim 11, characterized in that, The adsorbent includes porous activated carbon, vermiculite, or porous ceramics.

15. The battery device according to claim 1, characterized in that, The exhaust structure is provided on the side wall of the housing, the air inlet is provided on the side or top of the mixing hood, and the exhaust port is provided at the bottom of the mixing hood.

16. The battery device according to claim 1, characterized in that, The number of the mixing hood is one, and the mixing hood is installed outside the box to receive the flue gas discharged through all the exhaust structures; Alternatively, there may be multiple mixing hoods, which are spaced apart and installed on the outer periphery of the housing, with each mixing hood receiving flue gas discharged via a portion of the exhaust structure.

17. The battery device according to any one of claims 1-16, characterized in that, The battery device also includes a flow-disrupting component located within the mixing chamber.

18. The battery device according to claim 17, characterized in that, The turbulence assembly is located at the end of the mixing chamber near the exhaust port.

19. The battery device according to claim 17, characterized in that, The turbulence assembly includes at least one turbulence plate, one end of which is connected to the mixing hood, and the other end of which is spaced apart from the inner wall of the mixing hood to form a vent.

20. The battery device according to claim 19, characterized in that, The number of spoilers is multiple, and the multiple spoilers are spaced apart in the direction from the exhaust structure to the exhaust port.

21. The battery device according to claim 20, characterized in that, In the direction from the exhaust structure to the exhaust port, the vents at the other ends of two adjacent spoilers are staggered.

22. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-21.

23. The electrical appliance according to claim 22, characterized in that, The electrical device is a vehicle, which includes a chassis and has an installation space. The enclosure is installed in the installation space, and part of the chassis constitutes the gas mixing hood; Alternatively, the battery device is installed in the installation space, and the side of the chassis is provided with a gas inlet, which connects the air intake to the external environment; the bottom of the chassis is provided with a gas outlet, which connects the exhaust port to the external environment.

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