Battery box, battery device and power utilization device

Abstract

The utility model discloses a battery box, a battery device and a power utilization device. The battery box comprises a box body, a separation plate and a smoke pipeline, the separation plate is fixed in the box body, the surface of one side of the separation plate is used for being matched with the box body to form a containing cavity used for containing single batteries, and the separation plate is provided with a flow guide cavity and a first smoke inlet which are communicated with each other; the flue gas pipeline is fixedly connected with the isolation plate, the flue gas pipeline is provided with a second flue gas inlet communicated with the flow guide cavity, emissions generated by the single batteries enter the flue gas pipeline through the first flue gas inlet and the flow guide cavity, and the first flue gas inlet and the second flue gas inlet are arranged in a staggered mode. Therefore, emissions generated by the single batteries can enter the flue gas pipeline through the first flue gas inlet, the flow guide cavity and the second flue gas inlet in sequence, so that the path of the emissions entering the flue gas pipeline is prolonged, the temperature of the emissions when the emissions are in contact with the flue gas pipeline is reduced, and the risk that the battery box is on fire is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box, a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to sustainable development, which has promoted the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle capacity, high operating voltage, environmental protection and low self-discharge.

[0003] As the main load-bearing component of the battery, the battery box can protect the battery cells and discharge the emissions generated by the battery cells through the chimney on the battery box. However, the exhaust path of the chimney in the existing solution is too short, resulting in a higher temperature of the flue gas entering the chimney, which is more likely to cause a fire risk. Utility Model Content

[0004] The main purpose of the present application is to provide a battery box, a battery device and an electrical device, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] To solve the above-mentioned problems, the present application provides a battery box, which includes a box body, an isolation plate and a smoke duct, the isolation plate is fixed inside the box body, and one side surface of the isolation plate is used to cooperate with the box body to form a accommodating chamber for accommodating battery cells, and the isolation plate has a guide cavity and a first smoke inlet that are interconnected; the smoke duct and the isolation plate are fixedly connected, and the smoke duct has a second smoke inlet that is connected to the guide cavity, and the emissions generated by the battery cells enter the smoke duct via the first smoke inlet and the guide cavity, wherein the first smoke inlet and the second smoke inlet are staggered.

[0006] Therefore, the isolation plate is used to cooperate with the box body to form a accommodating chamber, so that the battery box can accommodate the battery cells to provide better protection for the battery cells, and the isolation plate has a guide cavity and a first smoke inlet that are interconnected, and the smoke duct has a second smoke inlet that is connected to the guide cavity. The first smoke inlet and the second smoke inlet are staggered, so that the emissions generated by the battery cells can enter the smoke duct via the first smoke inlet, the guide cavity and the second smoke inlet in sequence, so as to extend the path of the emissions entering the smoke duct, reduce the temperature of the emissions when they contact the smoke duct, and thus reduce the risk of fire in the battery box.

[0007] In some embodiments, the isolation plate is provided with a connecting hole, the connecting hole is connected to the accommodating chamber, the connecting hole is used to correspond to the explosion-proof valve of the battery cell, and the connecting hole is connected to the smoke duct through the first smoke inlet. Thus, the connecting hole corresponds to the explosion-proof valve of the battery cell, and the connecting hole is connected to the smoke duct through the first smoke inlet, so that the discharge discharged from the explosion-proof valve of the battery cell can directly enter the diversion cavity from the connecting hole, reducing the risk of the discharge of the battery cell excessively entering the accommodating space to damage the battery cell.

[0008] In some embodiments, the other side surface of the isolation plate away from the accommodating chamber is used to cooperate with the box body to form a smoke exhaust chamber, the connecting hole penetrates the opposite side surfaces of the isolation plate, the smoke exhaust chamber and the accommodating chamber are connected through the connecting hole to allow the emissions generated by the battery cell to enter the smoke exhaust chamber through the connecting hole, and the first smoke inlet includes a first smoke outlet, and the first smoke outlet faces the smoke exhaust chamber. Thus, the other side surface of the isolation plate away from the accommodating chamber is used to cooperate with the box body to form a smoke exhaust chamber, the smoke exhaust chamber and the accommodating chamber are connected through the connecting hole, and the first smoke outlet faces the smoke exhaust chamber, so that the emissions generated by the battery cell can first enter the smoke exhaust chamber through the connecting hole, then enter the guide chamber through the first smoke outlet, and finally enter the smoke duct through the second smoke inlet, which can further extend the path of the emissions entering the smoke duct, reduce the temperature of the emissions when they contact the smoke duct, and thus reduce the risk of fire in the battery box.

[0009] In some embodiments, the smoke duct includes a first pipe section and a second pipe section, the second smoke inlet is located in the first pipe section, the first pipe section extends in a direction away from the isolation plate, the second pipe section is connected to one end of the first pipe section away from the second smoke inlet, and the second pipe section is bent relative to the first pipe section and extends toward the side wall of the box. Thus, the second pipe section is connected to one end of the first pipe section away from the second smoke inlet, and the second pipe section is bent relative to the first pipe section and extends toward the side wall of the box, so that the emissions can be discharged from the battery box from the side, thereby alleviating the adverse effects caused by the emissions being discharged from the top of the battery box, and alleviating the risk of solid particles in the emissions entering and accumulating in the smoke duct, thereby causing the smoke duct to fail.

[0010] In some embodiments, the battery box further includes a pressure relief valve, the pressure relief valve is fixedly connected to the box body, the pressure relief valve corresponds to the second pipe segment away from one end of the first pipe segment, the distance from the first smoke outlet to the second pipe segment is defined as a first distance, the distance from the connecting hole to the pressure relief valve is defined as a second distance, the second distance is greater than or equal to 200 mm, and the sum of the second distance and the first distance is greater than or equal to 500 mm. Therefore, by reasonably designing the size of the first distance and the second distance, the temperature of the emission when it contacts the smoke duct can be further reduced, thereby reducing the risk of fire in the battery box.

[0011] In some embodiments, the number of the first smoke ports is multiple, and the radial dimension of the first smoke ports closer to the second smoke inlet is smaller. Thus, by providing multiple first smoke ports, the discharge of emissions from the smoke duct can be accelerated, and the radial dimension of the first smoke ports closer to the second smoke inlet is smaller, which can further reduce the temperature of the emissions when they contact the smoke duct, thereby reducing the risk of fire in the battery box.

[0012] In some embodiments, the battery box further includes a pressure relief valve, the pressure relief valve is fixedly connected to the box body, the pressure relief valve corresponds to the end of the smoke duct away from the second smoke inlet, the number of the first smoke inlets is multiple, and the sum of the areas of the multiple first smoke inlets is greater than or equal to the area of ​​the pressure relief valve. Therefore, the area of ​​the first smoke inlet is greater than or equal to the area of ​​the pressure relief valve, which can alleviate the risk of internal pressure buildup in the smoke duct, thereby reducing the risk of failure of the smoke duct.

[0013] In some embodiments, the first smoke inlet includes a second smoke outlet, and the second smoke outlet is located on the side wall of the connecting hole, so that the connecting hole is directly connected to the diversion cavity through the second smoke outlet, and the emissions generated by the battery cell enter the diversion cavity through the connecting hole and the second smoke outlet. Therefore, the second smoke outlet is located on the side wall of the connecting hole, so that the second smoke outlet can be directly connected to the connecting hole, and the emissions discharged from the battery cell from the explosion-proof valve can directly enter the diversion cavity from the connecting hole, reducing the risk of excessive entry of the emissions of the battery cell into the accommodation space to damage the battery cell.

[0014] In some embodiments, the smoke duct is located in the accommodating chamber, and the smoke duct is connected to the side of the isolation plate facing the accommodating chamber. Thus, the smoke duct is connected to the side of the isolation plate facing the accommodating chamber, which can reasonably utilize the space of the accommodating chamber, reduce the impact of the smoke duct on the exhaust chamber, reduce the volume of the exhaust chamber, and improve the overall energy density.

[0015] In some embodiments, the isolation plate includes a plurality of sub-isolation plates, and the plurality of sub-isolation plates are welded to form the isolation plate. Thus, the isolation plate is formed by welding a plurality of sub-isolation plates, which can facilitate the processing and manufacturing of the isolation plate and improve the stability of the isolation plate.

[0016] In some embodiments, the battery box further comprises a particle filter, and the particle filter covers the second smoke inlet. Thus, by covering the second smoke inlet with the particle filter, the particles in the emission can be shielded by the particle filter, thereby alleviating the risk of solid particles in the emission entering and accumulating in the smoke duct, thereby causing the smoke duct to fail.

[0017] In order to solve the above problems, the present application provides a battery device, which includes a battery cell and the above-mentioned battery box, and the battery cell is arranged in a receiving chamber of the battery box.

[0018] In some embodiments, the battery cell comprises a shell, a pole and an explosion-proof valve, the explosion-proof valve is located on the side of the shell facing the isolation plate, the connecting holes of the explosion-proof valve and the isolation plate correspond, and the pole is located on the side of the shell away from the isolation plate. Thus, the connecting holes of the explosion-proof valve and the isolation plate correspond, which facilitates the emissions generated by the battery cell to enter the smoke duct via the first smoke inlet, the guide cavity and the second smoke inlet in sequence, so as to extend the path of the emissions entering the smoke duct, reduce the temperature of the emissions when they contact the smoke duct, thereby reducing the risk of fire in the battery box, and the pole is located on the side of the shell away from the isolation plate, which can reduce the risk of direct contact between the pole and the emissions.

[0019] In some embodiments, the housing is used to cooperate with the isolation plate to seal the communication hole. Thus, by sealing the communication hole with the housing and the isolation plate, it is possible to further alleviate the emission generated by the battery cell from entering the accommodating chamber, thereby increasing the service life of the battery cell.

[0020] In order to solve the above problems, the present application provides an electrical device, which includes the battery device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments provided by the present application;

[0023] Figure 2is a schematic diagram of the disassembled structure of a battery device according to one or more embodiments provided in the present application;

[0024] Figure 3 is a schematic cross-sectional structural diagram of a battery device according to one or more embodiments provided in the present application;

[0025] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure within the dotted frame in the battery device shown;

[0026] Figure 5 is a schematic structural diagram of a smoke duct and a partition plate according to one or more embodiments provided in the present application;

[0027] Figure 6 is a schematic structural diagram of an isolation plate according to one or more embodiments provided in the present application;

[0028] Figure 7 It is a schematic diagram of the structure of a battery cell according to one or more embodiments provided in the present application.

[0029] Reference numerals: vehicle 1; battery device 2; controller 3; motor 4;

[0030] Battery box 10; box body 100; isolation plate 200; first smoke inlet 210; first smoke outlet 211; second smoke outlet 212; guide cavity 220; connecting hole 230; sub-partition plate 240; smoke duct 300; second smoke inlet 310; first pipe section 320; second pipe section 330; accommodating chamber 400; smoke exhaust chamber 500; particle filter 600; pressure relief valve 700; first spacing D1; second spacing D2;

[0031] Battery cell 20 ; outer shell 21 ; housing 201 ; bottom cover 202 ; accommodating space 22 ; pole 23 ; electrode assembly 24 ; explosion-proof valve 25 . DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] Energy conservation and emission reduction are the key to sustainable development, which has promoted the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle capacity, high operating voltage, environmental protection and low self-discharge.

[0041] Batteries mentioned in this field can be divided into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. Disposable batteries (PrimaryBattery) are also called "disposable" batteries and original batteries, because after they are exhausted, they can no longer be recharged and can only be discarded. Rechargeable batteries are also called secondary batteries (SecondaryBattery) or secondary batteries, storage batteries. The manufacturing materials and processes of rechargeable batteries are different from those of primary batteries. Its advantage is that it can be recycled many times after charging, and the output current load capacity of rechargeable batteries is higher than that of most disposable batteries. The common types of rechargeable batteries at present are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries have the advantages of light weight, large capacity (the capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and have a very low self-discharge rate. Therefore, even though the price is relatively high, they are still widely used. Lithium-ion batteries are currently also widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have a larger output and charging current, and also have a longer service life, but the cost is higher.

[0042] The battery described in the embodiments of the present application refers to a rechargeable battery or a disposable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0043] As the main load-bearing component of the battery, the battery box can protect the battery cells and discharge the emissions generated by the battery cells through the chimney on the battery box. However, the exhaust path of the chimney in the existing solution is too short, resulting in a higher temperature of the flue gas entering the chimney, which is more likely to cause a fire risk.

[0044] In order to solve the technical problems existing in the related art, the present application provides a battery box, a battery device and an electrical device. The battery box may include a box body, an isolation plate and a smoke duct. The box body and the isolation plate cooperate to form a accommodating chamber for accommodating battery cells. The first smoke inlet on the isolation plate and the second smoke inlet of the smoke duct are staggered. The emissions generated by the battery cells pass through the first smoke inlet, the guide cavity and the second smoke inlet into the smoke duct in sequence, so as to extend the path of the emissions entering the smoke duct and reduce the temperature of the emissions when they contact the smoke duct, thereby reducing the risk of fire in the battery box.

[0045] Specifically, in order to solve the technical problems existing in the related art, the present application provides an electric device, which may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc. Among them, the electric device may include a battery device, and the electric device may provide electric energy through the battery device to realize the corresponding function.

[0046] The present application also provides an electric vehicle, which may include a battery device.

[0047] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the structure of a vehicle according to one or more embodiments provided by the present application.

[0048] The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 2 is provided inside the vehicle 1, and the battery device 2 may be provided at the bottom, head or tail of the vehicle 1. The battery device 2 may be used to power the vehicle 1, for example, the battery device 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery device 2 to power the motor 4, for example, for starting, navigating and driving the vehicle 1.

[0049] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0050] In order to improve the performance of the electrical device, the present application also provides a battery device, see Figure 2 , Figure 2 It is a schematic diagram of the disassembled structure of a battery device according to one or more embodiments provided in the present application.

[0051] The shape of the battery device may include but is not limited to a square cylindrical shape or any other shape.

[0052] In some embodiments, the battery device 2 may include a battery box 10 and a battery cell 20, and the battery cell 20 is accommodated in the battery box 10. The battery box 10 is used to provide a storage space for the battery cell 20, and the battery box 10 can adopt a variety of structures. In the battery device 2, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery box 10; of course, the battery device 2 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and the multiple battery modules are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the battery box 10. The battery device 2 can also include other structures. For example, the battery device 2 can also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0053] The manufacturing methods of the battery cell 20 include stacking and winding, that is, the battery cell 20 is divided into stacking cells and winding cells. The stacking battery has a uniform current collection effect, a small internal resistance of the battery, and a large specific power, but in order to improve the precision, the mold precision is extremely high, the equipment investment is high, and the process is relatively complex, and the production efficiency is low. The winding battery is simple to make, and the equipment precision requirements for the production and assembly process are general, the production efficiency is high, and the cost is low. In terms of performance, the winding battery has excellent high and low temperature performance, charges very quickly, has an ultra-long life, a stable high output voltage, a solid structure, and strong shock resistance.

[0054] The battery box 10 serves as the main load-bearing component of the battery. It can protect the battery cells 20 and discharge the emissions generated by the battery cells 20 through the chimney on the battery box 10. However, in the relevant embodiments, the exhaust path of the chimney is too short, resulting in a higher temperature of the smoke entering the chimney, which is more likely to cause a fire risk.

[0055] In order to solve the technical problems existing in the related art, the present application provides a battery box 10, combined with Figure 3 and Figure 4 , Figure 3 is a schematic cross-sectional structural diagram of a battery device according to one or more embodiments provided in the present application; Figure 4 yes Figure 3 A schematic diagram of the enlarged structure within the dotted box in the battery device shown.

[0056] The battery box 10 includes a box body 100, an isolation plate 200 and a flue gas duct 300. The isolation plate 200 is fixed inside the box body 100. One side surface of the isolation plate 200 is used to cooperate with the box body 100 to form a accommodating chamber 400 for accommodating a battery cell 20. The isolation plate 200 has a guide cavity 220 and a first smoke inlet 210 that are interconnected. The smoke duct 300 and the isolation plate 200 are fixedly connected. The smoke duct 300 has a second smoke inlet 310 that is connected to the guide cavity 220. The emissions generated by the battery cell 20 enter the smoke duct 300 via the first smoke inlet 210 and the guide cavity 220, wherein the first smoke inlet 210 and the second smoke inlet 310 are staggered.

[0057] The box body 100 may include two parts, which are covered with each other to form the box body 100, and the two parts jointly define an internal space so as to accommodate components such as the battery cell 20 through the internal space. One of the two parts may be a hollow structure with one end open, and the other part may be a plate-like structure, and the plate-like structure part is covered with the open side of the hollow structure, so that the two parts jointly form the box body 100; the two parts may also be hollow structures with one side open, and the open sides of the two parts are covered with each other to form the box body 100.

[0058] The isolation plate 200 is located in the internal space of the box 100, and the edge size of the isolation plate 200 can match the inner wall size of the internal space of the box 100, so that the outer wall of the isolation plate 200 can abut against the inner wall of the box 100, so that the isolation plate 200 is fixed in the internal space of the box 100. The isolation plate 200 has two opposite surfaces along the thickness direction, one of which is used to cooperate with the internal space of the box 100 to form a accommodating chamber 400 for accommodating the battery cell 20, and the other side surface can directly contact the bottom wall of the box 100 or the other side surface is spaced from the bottom wall of the box 100 to form another chamber. The interior of the isolation plate 200 can be at least partially hollow, so that a guide cavity 220 is formed inside the isolation plate 200.

[0059] The smoke duct 300 is fixedly connected to the isolation plate 200. The smoke duct 300 may be hollow. The second smoke inlet 310 of the smoke duct 300 is directly connected to the guide cavity 220. The smoke outlet of the smoke duct 300 may be connected to the second smoke inlet 310. After the smoke enters the smoke duct 300 from the second smoke inlet 310, it may exit the smoke duct 300 from the smoke outlet of the smoke duct 300. The isolation plate 200 has a guide cavity 220 and a first smoke inlet 210 that are connected to each other, so that the first smoke inlet 210, the guide cavity 220 and the second smoke inlet 310 are connected in sequence. The staggered arrangement of the first smoke inlet 210 and the second smoke inlet 310 can be understood as the projections of the first smoke inlet 210 and the second smoke inlet 310 in the thickness direction of the isolation plate 200 do not overlap, that is, the first smoke inlet 210 and the second smoke inlet 310 are not on the same straight line in the thickness direction of the isolation plate 200. When the battery cell 20 generates emissions, the emissions must enter the diversion cavity 220 through the first smoke inlet 210 in sequence, and then exit the diversion cavity 220 through the second smoke inlet 310. Since the first smoke inlet 210 and the second smoke inlet 310 are staggered, the emissions must travel a sufficiently long path in the diversion cavity 220 before exiting the diversion cavity 220 from the second smoke inlet 310. The emissions may include but are not limited to smoke or other gases.

[0060] Through the above embodiment, the isolation plate 200 is used to cooperate with the box body 100 to form a accommodating chamber 400, so that the battery box 10 can accommodate the battery cell 20 to provide better protection for the battery cell 20, and the isolation plate 200 has a guide cavity 220 and a first smoke inlet 210 that are interconnected, and the smoke duct 300 has a second smoke inlet 310 that is connected to the guide cavity 220. The first smoke inlet 210 and the second smoke inlet 310 are staggered, so that the emissions generated by the battery cell 20 can enter the smoke duct 300 via the first smoke inlet 210, the guide cavity 220 and the second smoke inlet 310 in sequence, so as to extend the path of the emissions entering the smoke duct 300, reduce the temperature of the emissions when they contact the smoke duct 300, and thus reduce the risk of fire in the battery box 10.

[0061] In some embodiments, the isolation plate 200 is provided with a connecting hole 230, the connecting hole 230 is connected to the accommodating chamber 400, the connecting hole 230 is used to correspond to the explosion-proof valve 25 of the battery cell 20, and the connecting hole 230 is connected to the smoke duct 300 through the first smoke inlet 210. The connecting hole 230 can penetrate the opposite two sides of the isolation plate 200 along the thickness direction of the isolation plate 200, that is, the connecting hole 230 can be a through hole so that the connecting hole 230 is connected to the accommodating chamber 400. Or the connecting hole 230 can be a blind hole, and the opening of the connecting hole 230 faces the accommodating chamber 400, so that the connecting hole 230 is connected to the accommodating chamber 400. The discharge inside the battery cell 20 can exit the battery cell 20 through the explosion-proof valve 25 of the battery cell 20, and the explosion-proof valve 25 of the battery cell 20 can correspond to the connecting hole 230, for example, the explosion-proof valve 25 of one battery cell 20 is located in one connecting hole 230. Therefore, the connecting hole 230 corresponds to the explosion-proof valve 25 of the battery cell 20, and the connecting hole 230 is connected to the smoke duct 300 through the first smoke inlet 210, so that the emissions discharged from the explosion-proof valve 25 of the battery cell 20 can directly enter the guide cavity 220 from the connecting hole 230, reducing the risk of the emissions of the battery cell 20 excessively entering the accommodating space 22 and damaging the battery cell 20.

[0062] Further, the other side surface of the isolation plate 200 away from the accommodating chamber 400 is used to cooperate with the box body 100 to form a smoke exhaust chamber 500, and the connecting hole 230 penetrates the opposite side surfaces of the isolation plate 200. The smoke exhaust chamber 500 and the accommodating chamber 400 are connected through the connecting hole 230 to allow the emissions generated by the battery cell 20 to enter the smoke exhaust chamber 500 through the connecting hole 230. The first smoke inlet 210 includes a first smoke outlet 211, and the first smoke outlet 211 faces the smoke exhaust chamber 500. One side surface of the isolation plate 200 in the thickness direction is used to cooperate with the internal space of the box body 100 to form the accommodating chamber 400 for accommodating the battery cell 20, and the other side surface of the isolation plate 200 in the thickness direction is spaced from the bottom wall of the box body 100 to form the smoke exhaust chamber 500. In this embodiment, the connecting hole 230 is a through hole that penetrates the opposite surfaces of the isolation plate 200, so that the connecting hole 230 can connect the smoke exhaust chamber 500 and the accommodating chamber 400, and the first smoke port 211 faces the smoke exhaust chamber 500, and the first smoke port 211 is connected to the guide chamber 220, that is, the guide chamber 220 is connected to the smoke exhaust chamber 500 through the first smoke port 211. When the emissions generated by the battery cell 20 are discharged from the explosion-proof valve 25, the emissions can enter the smoke exhaust chamber 500 through the connecting hole 230, then enter the guide chamber 220 through the first smoke port 211, and finally enter the smoke duct 300 through the second smoke inlet 310. In this way, the path for the emissions to enter the smoke duct 300 can be further extended, and the temperature of the emissions when they contact the smoke duct 300 can be reduced, thereby reducing the risk of fire in the battery box 10.

[0063] In some embodiments, the smoke duct 300 includes a first pipe section 320 and a second pipe section 330, the second smoke inlet 310 is located in the first pipe section 320, the first pipe section 320 extends in a direction away from the isolation plate 200, the second pipe section 330 is connected to one end of the first pipe section 320 away from the second smoke inlet 310, and the second pipe section 330 is bent relative to the first pipe section 320 and extends toward the side wall of the box body 100. The first pipe section 320 can be in a straight tube shape, one end of the first pipe section 320 is the second smoke inlet 310, and when the first pipe section 320 and the isolation plate 200 are connected, the second smoke inlet 310 and the guide cavity 220 are connected. The second pipe section 330 may be in the shape of a curved tube, and one end of the second pipe section 330 is connected to one end of the first pipe section 320 away from the isolation plate 200, so that the internal hollow of the first pipe section 320 is combined and communicated with the internal hollow structure of the second pipe section 330, and the emissions can enter the first pipe section 320 from the second smoke inlet 310 and then enter the second pipe section 330. The second pipe section 330 can extend to the side wall of the box body 100 in a direction away from the battery cell 20, and the second pipe section 330 can penetrate the side wall of the box body 100, so that one end of the second pipe section 330 away from the first pipe section 320 is communicated with the external environment, and then the emissions of the battery cell 20 can be discharged from the box body 100 through the smoke duct 300. In this way, the emissions can be discharged from the battery box 10 from the side of the battery box 10, reducing the adverse effects caused by the emissions being discharged from the top of the battery box 10, and reducing the risk of solid particles in the emissions entering and accumulating in the smoke duct 300, thereby causing the smoke duct 300 to fail.

[0064] Further, the battery box 10 further includes a pressure relief valve 700, which is fixedly connected to the box body 100, and the pressure relief valve 700 corresponds to the end of the second pipe section 330 away from the first pipe section 320. The spacing from the first cigarette port 211 to the second pipe section 330 is defined as a first spacing D1, and the spacing from the connecting hole 230 to the pressure relief valve 700 is defined as a second spacing D2. The second spacing D2 is greater than or equal to 200 mm, and the sum of the second spacing D2 and the first spacing D1 is greater than or equal to 500 mm. The first spacing D1 can be the spacing from any position of the first cigarette port 211 to any position of the second pipe section 330. For example, the spacing between the geometric center of the first cigarette port 211 and the geometric center of the connection between the second pipe section 330 and the first pipe section 320 can be taken as the first spacing D1; or the spacing between the geometric center of the first cigarette port 211 and the midpoint of the bend of the second pipe section 330 can be taken as the first spacing D1. The second distance D2 may be the distance from any position of the connecting hole 230 to any position of the pressure relief valve 700. For example, the distance between the geometric center of the connecting hole 230 and the geometric center of the pressure relief valve 700 may be taken as the second distance D2. When there are multiple connecting holes 230, the second distance D2 is the distance between the connecting hole 230 closest to the pressure relief valve 700 and the pressure relief valve 700. When there are multiple first cigarette outlets 211, the first distance D1 may be the distance between the first cigarette outlet 211 farthest from the second pipe section 330 and the second pipe section 330. The second distance D2 may include but is not limited to 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm or 300mm, etc. The second spacing D2 may be greater than or equal to 200 mm and less than or equal to 400 mm, for example, the second spacing D2 may be greater than or equal to 200 mm and less than or equal to 300 mm, or the second spacing D2 may be greater than or equal to 300 mm and less than or equal to 400 mm, etc. The sum of the second spacing D2 and the first spacing D1 is greater than or equal to 500 mm, for example, when the first spacing D1 is 200 mm, the second spacing D2 may be greater than or equal to 300 mm; when the first spacing D1 is 300 mm, the second spacing D2 may be greater than or equal to 200 mm.

[0065] Take the following measured data as an example to illustrate the effect:

[0066] Take a battery cell 20 with a size of 31*238*117mm, put a 30*30mm and 300W heating device inside the battery cell 20 to trigger thermal runaway of the battery cell 20, take a 3mm thick sheet metal box 100 and a 0.7mm thick carbon fiber upper cover and lower cover to form a test device; place the battery cell 20 in the box 100 before testing; during the test, adjust the second spacing D2 from the geometric center of the explosion-proof valve 25 of the battery cell 20 to the pressure relief valve 700, and the first spacing D1 from the geometric center of the first smoke port 211 to the second pipe section 330. Then input the trigger heating device to cause the battery cell 20 to thermal runaway. After the thermal runaway ends, observe whether there is an open flame in the explosion-proof valve 25 of the battery box 10. The observation results are as follows:

[0067]

[0068] From the above observation results, it can be seen that in the test results of the data corresponding to sequence numbers 5, 7 and 8, the battery box 10 did not spray fire, and the second smoke inlet 310 did not melt. In the test results of the data corresponding to sequence number 4, the battery box 10 briefly sprayed sparks, and the second smoke inlet 310 did not melt. And the second spacing D2 in these groups of data is greater than or equal to 200mm, and the sum of the second spacing D2 and the first spacing D1 is greater than or equal to 500mm. Therefore, by reasonably designing the dimensions of the first spacing D1 and the second spacing D2, the temperature of the emissions when they contact the flue gas duct 300 can be further reduced, thereby reducing the risk of fire in the battery box 10.

[0069] In some embodiments, the smoke duct 300 is located in the receiving chamber 400, and the smoke duct 300 is connected to the side of the isolation plate 200 facing the receiving chamber 400. The receiving chamber 400 is used to receive the battery cell 20, and the smoke exhaust chamber 500 is used for the exhaust flow. The size of the smoke exhaust chamber 500 can be much smaller than the size of the receiving chamber 400. The smoke duct 300 is connected to the side of the isolation plate 200 facing the receiving chamber 400, which can reasonably utilize the space of the receiving chamber 400, reduce the impact of the smoke duct 300 on the smoke exhaust chamber 500, reduce the volume of the smoke exhaust chamber 500, and improve the overall energy density.

[0070] In some embodiments, the isolation plate 200 includes a plurality of sub-separators 240, and the plurality of sub-separators 240 are welded to form the isolation plate 200. The number of sub-separators 240 can be set according to actual conditions, and the plurality of sub-separators 240 can be spliced ​​together and then welded along the edges of the connection between two adjacent sub-separators 240 to form the isolation plate 200. Thus, the isolation plate 200 is formed by welding the plurality of sub-separators 240, which can facilitate the processing and manufacturing of the isolation plate 200 and improve the stability of the isolation plate 200.

[0071] In some embodiments, the battery box 10 further includes a particle filter 600, which covers the second smoke inlet 310. The particle filter 600 allows particles smaller than a predetermined size to pass through, and blocks particles larger than or equal to a predetermined size from passing through, so that when the particle filter 600 is covered on the second smoke inlet 310, the particle filter 600 can shield the particles in the emissions, thereby alleviating the risk of solid particles in the emissions entering and accumulating in the smoke duct 300, thereby causing the smoke duct 300 to fail.

[0072] Combination Figure 5 , Figure 5 It is a schematic structural diagram of a flue gas duct 300 and a separation plate 200 according to one or more embodiments provided in the present application.

[0073] There are multiple first smoke ports 211, and the closer the first smoke ports 211 are to the second smoke inlet 310, the smaller the radial dimension is. The number of first smoke ports 211 can be set according to actual conditions, for example, the number of first smoke ports 211 can be four, five, six, etc. Multiple first smoke ports 211 can be divided into two groups, each group has one or more first smoke ports 211, and each side of the smoke duct 300 can have one group. The radial dimension of the first smoke port 211 can include but is not limited to 8mm, 7mm, 6mm, 5mm, 4mm, 3mm, 2mm, etc. Specifically, when the spacing between the first cigarette port 211 and the second pipe section 330 is greater than 0 and less than 50 mm, the radial dimension of the first cigarette port 211 may be less than or equal to 2 mm; when the spacing between the first cigarette port 211 and the second pipe section 330 is greater than or equal to 50 and less than 150 mm, the radial dimension of the first cigarette port 211 may be less than or equal to 4 mm; when the spacing between the first cigarette port 211 and the second pipe section 330 is greater than or equal to 150 and less than 300 mm, the radial dimension of the first cigarette port 211 may be less than or equal to 8 mm; when the spacing between the first cigarette port 211 and the second pipe section 330 is greater than or equal to 300 mm, the radial dimension of the first cigarette port 211 may be set according to actual needs. Thus, by setting a plurality of first cigarette ports 211, it is possible to accelerate the discharge of emissions from the smoke duct 300, and the radial dimension of the first cigarette port 211 closer to the second smoke inlet 310 is smaller, which can further reduce the temperature of the emissions when they contact the smoke duct 300, thereby reducing the risk of fire in the battery box 10.

[0074] In some embodiments, the battery box 10 further includes a pressure relief valve 700, which is fixedly connected to the box body 100, and corresponds to the end of the smoke duct 300 away from the second smoke inlet 310, and the area of ​​the first smoke outlet 211 is greater than or equal to the area of ​​the pressure relief valve 700. The pressure relief valve 700 is fixedly connected to the box body 100, and corresponds to the end of the smoke duct 300 away from the second smoke inlet 310. When the air pressure inside the battery box 10 is too high, the pressure relief valve 700 and the smoke duct 300 can cooperate to reduce the air pressure inside the battery box 10. The number of the first smoke outlets 211 can be one or more, and the number of the first smoke outlets 211 can be set according to actual conditions, for example, the number of the first smoke outlets 211 can be one, four, five, six, and so on. When there is one first smoke port 211, the area of ​​the first smoke port 211 may be greater than the area of ​​the pressure relief valve 700; when there are multiple first smoke ports 211, the sum of the areas of the multiple first smoke ports 211 is greater than or equal to the area of ​​the pressure relief valve 700. Thus, the risk of internal pressure build-up in the smoke duct 300 can be alleviated, thereby reducing the risk of failure of the smoke duct 300.

[0075] Combination Figure 6 , Figure 6 is a schematic structural diagram of an isolation plate 200 according to one or more embodiments provided in the present application.

[0076] The first smoke inlet 210 includes a second smoke outlet 212, and the second smoke outlet 212 is located on the side wall of the connecting hole 230, so that the connecting hole 230 is directly connected to the diversion chamber 220 through the second smoke outlet 212, and the emissions generated by the battery cell 20 enter the diversion chamber 220 through the connecting hole 230 and the second smoke outlet 212. In this embodiment, the connecting hole 230 can penetrate the opposite two side surfaces of the isolation plate 200 along the thickness direction of the isolation plate 200, that is, the connecting hole 230 can be a through hole so that the connecting hole 230 is connected to the accommodating chamber 400. Or the connecting hole 230 can be a blind hole, and the opening of the connecting hole 230 faces the accommodating chamber 400, so that the connecting hole 230 is connected to the accommodating chamber 400. The isolation plate 200 has two opposite surfaces along the thickness direction, one of which is used to cooperate with the internal space of the box body 100 to form a receiving chamber 400 for receiving the battery cell 20, and the other side surface can be in direct contact with the bottom wall of the box body 100 or the other side surface is spaced from the bottom wall of the box body 100 to form another chamber. The interior of the isolation plate 200 can be at least partially hollow, so that a guide chamber 220 is formed inside the isolation plate 200, and the second smoke outlet 212 is located on the side wall of the connecting hole 230, so that the connecting hole 230 can be directly connected to the guide chamber 220 through the second smoke outlet 212. When the battery cell 20 generates emissions and enters the connecting hole 230, the emissions can directly enter the guide chamber 220 through the second smoke outlet 212, thereby reducing the risk of the emissions of the battery cell 20 excessively entering the receiving space 22 to damage the battery cell 20.

[0077] Combination Figures 2 to 7 , Figure 7 is a schematic structural diagram of a battery cell 20 according to one or more embodiments provided in the present application.

[0078] The battery cell 20 includes a shell 21, a pole 23 and an explosion-proof valve 25. The explosion-proof valve 25 is located on the side of the shell 21 facing the isolation plate 200. The explosion-proof valve 25 corresponds to the connecting hole 230 of the isolation plate 200. The pole 23 is located on the side of the shell 21 away from the isolation plate 200.

[0079] The battery cell 20 may also include other functional components such as an electrode assembly 24, and the housing 201 is used to encapsulate the electrode assembly 24 and components such as electrolyte. The electrode assembly 24 is a component in the battery cell 20 where an electrochemical reaction occurs, and the housing 201 may contain one or more electrode assemblies 24. In this embodiment, the housing 21 may include the housing 201 and a bottom cover 202, and the explosion-proof valve 25 may be provided on the bottom cover 202.

[0080] The housing 201 may have an open end, and a pole 23 may be provided on the wall of the housing 201 opposite to the open end. The pole 23 may have a through hole, and the housing 201 and the bottom cover 202 may be connected to form a receiving cavity connected to the through hole. The active material coating portion of the electrode assembly 24 may be provided in the housing 201, and the pole ear portion of the electrode assembly 24 passes through the through hole and is connected to the side of the pole 23 away from the receiving cavity. The pole 23 may be used to be electrically connected to the electrode assembly 24 for outputting or inputting the electric energy of the battery.

[0081] The bottom cover 202 can cover the open end of the shell 201 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the bottom cover 202 can be adapted to the shape of the open end to match the shell 201. Optionally, the bottom cover 202 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the bottom cover 202 is not easy to deform when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. The shell 201 is a component used to cooperate with the bottom cover 202 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 24, electrolyte and other components. The shell 201 and the bottom cover 202 can be independent components, and an open end can be set on the shell 201, and the internal environment of the battery cell 20 is formed by covering the open end with the bottom cover 202 at the open end. In other embodiments, the shape of the shell 201 can be determined according to the specific shape and size of the electrode assembly 24. The shell 201 can be made of various materials, for example, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0082] The explosion-proof valve 25 may be arranged on the bottom cover 202, and the pole 23 may be arranged on the side of the housing 201 away from the bottom cover 202, so that the distance between the pole 23 and the explosion-proof valve 25 is large enough. When the battery cell 20 is arranged in the accommodating chamber 400, the bottom cover 202 of the battery cell 20 may be carried on the isolation plate 200, and the explosion-proof valve 25 and the connecting hole 230 of the isolation plate 200 correspond. Among them, the shape of the connecting hole 230 may match the shape of the explosion-proof valve 25, and when the explosion-proof valve 25 and the connecting hole 230 correspond, the explosion-proof valve 25 may completely cover the connecting hole 230. Or the radial dimension of the connecting hole 230 may be larger than the radial dimension of the explosion-proof valve 25, and when the battery cell 20 is arranged on the isolation plate 200, the bottom cover 202 may abut against the isolation plate 200, so that the explosion-proof valve 25 can be embedded in the connecting hole 230, and so on. This makes it easier for the emissions generated by the battery cell 20 to enter the smoke duct 300 via the first smoke inlet 210, the guide cavity 220 and the second smoke inlet 310 in sequence, so as to extend the path of the emissions entering the smoke duct 300 and reduce the temperature of the emissions when they contact the smoke duct 300, thereby reducing the risk of fire in the battery box 10. In addition, the pole 23 is located on the side of the outer shell 21 away from the isolation plate 200, which can reduce the risk of direct contact between the pole 23 and the emissions.

[0083] Furthermore, the housing 21 is used to cooperate with the isolation plate 200 to seal the communication hole 230. A sealing ring may be provided between the housing 21 and the isolation plate 200, and the sealing ring is provided around the communication hole 230. When the battery cell 20 is provided in the accommodation space 22, the housing 21 may squeeze the sealing ring so that the housing 21 cooperates with the isolation plate 200 to seal the communication hole 230. By sealing the communication hole 230 with the housing 21 and the isolation plate 200, it is possible to further alleviate the discharge generated by the battery cell 20 from entering the accommodation chamber 400, thereby improving the service life of the battery cell 20.

[0084] To summarize, the isolation plate 200 is used to cooperate with the box body 100 to form a accommodating chamber 400, so that the battery box 10 can accommodate the battery cell 20 to provide better protection for the battery cell 20, and the isolation plate 200 has a guide cavity 220 and a first smoke inlet 210 that are interconnected, and the smoke duct 300 has a second smoke inlet 310 that is connected to the guide cavity 220. The first smoke inlet 210 and the second smoke inlet 310 are staggered, so that the emissions generated by the battery cell 20 can enter the smoke duct 300 via the first smoke inlet 210, the guide cavity 220 and the second smoke inlet 310 in sequence, so as to extend the path of the emissions entering the smoke duct 300, reduce the temperature of the emissions when they contact the smoke duct 300, and thus reduce the risk of fire in the battery box 10.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery box, characterized in that: The battery box comprises: Box; An isolation plate is fixed inside the box body, one side surface of the isolation plate is used to cooperate with the box body to form a receiving chamber for receiving a battery cell, and the isolation plate has a flow guiding cavity and a first smoke inlet which are interconnected; A smoke duct, wherein the smoke duct and the isolation plate are fixedly connected, the smoke duct has a second smoke inlet connected to the guide cavity, and the emissions generated by the battery cell enter the smoke duct via the first smoke inlet and the guide cavity, wherein the first smoke inlet and the second smoke inlet are staggered.

2. The battery box according to claim 1, characterized in that: The isolation plate is provided with a communication hole, the communication hole is connected to the accommodating chamber, the communication hole is used to correspond to the explosion-proof valve of the battery cell, and the communication hole is connected to the smoke duct through the first smoke inlet.

3. The battery box according to claim 2, characterized in that: The other side surface of the isolation plate facing away from the accommodating chamber is used to cooperate with the box body to form a smoke exhaust chamber, and the connecting hole penetrates the two opposite sides of the isolation plate. The smoke exhaust chamber and the accommodating chamber are connected through the connecting hole to allow emissions generated by the battery cell to enter the smoke exhaust chamber through the connecting hole, and the first smoke inlet includes a first smoke outlet, and the first smoke outlet faces the smoke exhaust chamber.

4. The battery box according to claim 3, characterized in that: The smoke duct includes a first pipe section and a second pipe section, the second smoke inlet is located in the first pipe section, the first pipe section extends in a direction away from the isolation plate, the second pipe section is connected to an end of the first pipe section away from the second smoke inlet, and the second pipe section is bent relative to the first pipe section and extends toward the side wall of the box.

5. The battery box according to claim 4, characterized in that: The battery box also includes a pressure relief valve, which is fixedly connected to the box body, and the pressure relief valve corresponds to an end of the second pipe segment away from the first pipe segment. The distance from the first cigarette port to the second pipe segment is defined as a first distance, and the distance from the connecting hole to the pressure relief valve is defined as a second distance. The second distance is greater than or equal to 200 mm, and the sum of the second distance and the first distance is greater than or equal to 500 mm.

6. The battery box according to claim 3, characterized in that: There are multiple first smoke outlets, and the radial dimensions of the first smoke outlets closer to the second smoke inlet are smaller.

7. The battery box according to claim 3, characterized in that: The battery box also includes a pressure relief valve, which is fixedly connected to the box body, corresponds to an end of the smoke duct away from the second smoke inlet, and an area of ​​the first smoke inlet is greater than or equal to an area of ​​the pressure relief valve.

8. The battery box according to claim 2, characterized in that: The first smoke inlet includes a second smoke outlet, and the second smoke outlet is located on the side wall of the connecting hole, so that the connecting hole is directly connected to the guide cavity through the second smoke outlet, and the emissions generated by the battery cell enter the guide cavity through the connecting hole and the second smoke outlet.

9. The battery box according to claim 1, characterized in that: The smoke duct is located in the accommodating chamber, and the smoke duct is connected to a side of the isolation plate facing the accommodating chamber.

10. The battery box according to claim 1, characterized in that: The isolation plate includes a plurality of sub-isolation plates, and the plurality of sub-isolation plates are welded to form the isolation plate.

11. The battery box according to any one of claims 1 to 10, characterized in that: The battery box further comprises a particle filter, and the particle filter covers the second smoke inlet.

12. A battery device, characterized in that: The battery device comprises a battery cell and a battery box as claimed in any one of claims 1 to 11, wherein the battery cell is arranged in a receiving chamber of the battery box.

13. The battery device according to claim 12, characterized in that: The battery cell comprises a shell, a pole and an explosion-proof valve. The explosion-proof valve is located on the side of the shell facing the isolation plate. The explosion-proof valve corresponds to the connecting hole of the isolation plate. The pole is located on the side of the shell away from the isolation plate.

14. The battery device according to claim 13, characterized in that: The housing is used to cooperate with the isolation plate to seal the communication hole.

15. An electrical device, characterized in that: The electrical device comprises the battery device as claimed in any one of claims 12 to 14.

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