Battery, battery safety system and electric device

Abstract

A battery, a battery safety system, and an electric device. The battery comprises a case, battery cells and at least one processing mechanism, wherein an exhaust channel is formed in the case, and the battery cells are accommodated in the case; the processing mechanism comprises a power source and an actuating mechanism; the power source is connected to the actuating mechanism, a treatment channel is formed in the actuating mechanism, the treatment channel is communicated with the exhaust channel, and the power source is used for driving the actuating mechanism to operate to treat fumes and gases flowing through the treatment channel.

Description

Batteries, battery safety systems and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202410264321.6 and application date of March 7, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery, a battery safety system, and an electrical device. Background Art

[0004] In typical power batteries, multiple battery cells are typically stacked within a battery housing to ensure sufficient power. However, the constant charging and discharging of these cells generates significant heat, which can cause the battery's internal temperature to rise. Stacking multiple cells exacerbates this phenomenon.

[0005] Thermal runaway occurs when the internal temperature of the battery is abnormal. Thermal runaway will produce a large amount of high-temperature smoke. Usually, the solution to thermal runaway is to discharge the thermal runaway smoke directly out of the battery pack to stabilize the pressure inside the battery. However, high-temperature smoke is prone to explosion or secondary damage due to external igniters, so it needs to be improved.

[0006] Summary of the Invention

[0007] The present application provides a battery, a battery safety system, and an electrical device to reduce the hazards of battery thermal runaway smoke and improve battery safety.

[0008] In a first aspect, an embodiment of the present application provides a battery, comprising: a casing, a battery cell, and at least one processing mechanism, wherein the casing forms an exhaust channel; the battery cell is housed in the casing; the processing mechanism comprises a power source and an actuator, the power source is connected to the actuator, the actuator forms a processing channel, the processing channel is connected to the exhaust channel, and the power source is used to drive the actuator to operate to process the flue gas flowing through the processing channel.

[0009] In the above technical solution, a processing mechanism is provided, which includes a power source and an actuator. When the battery is operating normally, the power source is turned off, and no additional energy loss is generated. When the battery abnormally produces a certain amount of smoke, the actuator can process the smoke to a certain extent. When the battery thermal runaway produces a large amount of smoke, the power source drives the actuator to process the smoke to a stronger degree, thereby adapting to various scenarios and effectively improving the treatment effect of the smoke. Compared with the treatment method of directly discharging high-temperature smoke from the battery, this application can reduce the harm of the battery thermal runaway smoke and significantly improve the safety of the battery.

[0010] In some embodiments, the actuator includes a centrifugal separation mechanism, which forms the processing channel and is used to separate at least part of the particulate matter in the flue gas.

[0011] In some embodiments, the centrifugal separation mechanism comprises:

[0012] a casing, wherein the casing is provided with an air outlet of the processing channel;

[0013] a cover plate, the cover plate being mounted on the open end of the housing and provided with an air inlet of the processing channel;

[0014] An impeller is rotatably mounted in the processing channel, and the power source is connected to the impeller and is used to drive the impeller to rotate.

[0015] In some embodiments, the air outlet is provided on the bottom wall of the casing facing away from the cover plate, and the air outlet is divided into multiple groups, and the multiple groups of air outlets are distributed radially spaced apart along the centrifugal separation mechanism, and the flow area of ​​each air outlet is negatively correlated with the distance from the air outlet to the axis of the centrifugal separation mechanism.

[0016] In some embodiments, the inner peripheral wall of the housing is provided with an inwardly protruding stopper, and the stopper is used to block the movement of particles.

[0017] In some embodiments, the stopping portion is in the shape of a strip.

[0018] In some embodiments, the height of the stop portion protruding from the inner peripheral wall of the housing is H1, which satisfies: 1mm≤H1≤30mm.

[0019] In some embodiments, the stopper is bent and forms a collection bin together with the inner peripheral wall of the housing. The opening direction of the collection bin is opposite to the airflow direction in the housing.

[0020] In some embodiments, the cover plate includes a flange protruding axially inward at the edge of the air inlet, and the flange is provided with a plurality of air inlet channels distributed and spaced apart along the circumferential direction.

[0021] In some embodiments, the air inlet channel is in an elongated shape.

[0022] In some embodiments, the width of the air inlet channel is W1, which satisfies: 0.1 mm ≤ W1 ≤ 5 mm.

[0023] In some embodiments, the minimum aperture of the air outlet is no greater than the width of the air inlet channel.

[0024] In some embodiments, the flange surrounds the impeller shaft of the impeller and is spaced apart from the impeller shaft; the plurality of blades of the impeller surrounds the flange and is spaced apart from the flange.

[0025] In some embodiments, the impeller comprises:

[0026] a rotating disk, the rotating disk being spaced apart from the inner peripheral wall and the bottom wall of the housing;

[0027] a plurality of blades, wherein the blades are mounted on the rotating disk;

[0028] An impeller shaft is connected to the rotating disk, and the plurality of blades are arranged around the impeller shaft.

[0029] In some embodiments, the actuator includes an air dilution mechanism, which includes a fan and forms the processing channel. The power source is connected to the fan and drives the fan to introduce air into the processing channel for diluting the flue gas.

[0030] In some embodiments, the processing channel includes:

[0031] a first channel, wherein an air inlet end of the first channel is in communication with the exhaust channel;

[0032] a second channel, the fan being used to introduce air into the second channel;

[0033] The third channel, the air outlet end of the second channel and the air inlet end of the third channel are both connected to the air outlet end of the first channel.

[0034] In some embodiments, the following condition is satisfied: α1≤90°, where α1 is the angle between an extension direction from the air outlet end to the air inlet end of the second channel and an extension direction from the air outlet end to the air inlet end of the first channel.

[0035] In some embodiments, the following condition is satisfied: α2 ≥ 90°, wherein α2 is the angle between an extension direction from the air outlet end to the air inlet end of the second channel and an extension direction from the air inlet end to the air outlet end of the third channel.

[0036] In some embodiments, the actuator includes a spray mechanism, which forms the processing channel, and the power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid into the flue gas in the processing channel.

[0037] In some embodiments, the spray mechanism includes:

[0038] a housing forming the processing channel;

[0039] an air intake pipe, at least a portion of which extends into the housing;

[0040] a sprayer, the pump body being connected to the sprayer and driving the sprayer to spray liquid into the processing channel;

[0041] An air outlet pipe is connected to the processing channel.

[0042] In some embodiments, a portion of the air inlet pipe extending into the shell is provided with a plurality of air inlet holes.

[0043] In some embodiments, the air inlet hole is provided with a seal for sealing the air inlet hole, and the seal is configured to fail when the pressure of the air inlet pipe reaches a target pressure and / or the temperature reaches a target temperature.

[0044] In some embodiments, a filter element for filtering at least part of the particulate matter is provided in the air intake pipe.

[0045] In some embodiments, the air inlet pipe includes: an air inlet section, a connecting section, and an air outlet section connected in sequence, the air outlet section is located in the shell, and the air inlet section is higher than the air outlet section.

[0046] In some embodiments, the actuator includes a centrifugal separation mechanism and a spray mechanism arranged sequentially along the direction of the exhaust channel to the outside; the centrifugal separation mechanism forms the processing channel, which is used to separate at least part of the particulate matter in the flue gas; the spray mechanism forms the processing channel, and the power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid into the flue gas in the processing channel.

[0047] In some embodiments, the actuator includes a centrifugal separation mechanism, a spray mechanism, and an air blast dilution mechanism sequentially arranged along the direction from the exhaust passage to the outside;

[0048] The centrifugal separation mechanism forms the processing channel, which is used to separate at least part of the particulate matter in the flue gas; the spray mechanism forms the processing channel, and the power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid into the flue gas in the processing channel; the air dilution mechanism includes a fan and forms the processing channel, and the power source is connected to the fan and drives the fan to introduce air for diluting the flue gas into the processing channel.

[0049] In a second aspect, an embodiment of the present application provides a battery safety system, including:

[0050] Any of the above batteries;

[0051] a control system, the control system being electrically connected to the processing mechanism;

[0052] A power supply system, the power supply system is electrically connected to the processing mechanism; wherein,

[0053] The control system is configured to output alarm information indicating thermal runaway of the battery when determining that thermal runaway of the battery occurs, and the processing mechanism outputs a control instruction, and the power supply system is configured to provide power.

[0054] In some embodiments, the control system includes the battery management system;

[0055] And / or, the control system includes a vehicle controller.

[0056] In some embodiments, the control system includes the battery management system and the vehicle controller. The battery management system is configured to output a control instruction to the processing mechanism and output first information carrying battery thermal runaway to the vehicle controller when it determines that the battery has thermal runaway; the battery management system is configured to output second information to the vehicle controller when it outputs a control instruction to the processing mechanism; and the vehicle controller is configured to output a control instruction to the processing mechanism when it has not received the second information after a first target time has passed since receiving the first information.

[0057] In a third aspect, an embodiment of the present application provides an electrical device, including:

[0058] The battery as described in any one of the above, or the battery safety system as described in any one of the above, is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0060] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0061] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0062] FIG3 is an axial diagram of a centrifugal separation mechanism provided in some embodiments of the present application;

[0063] FIG4 is an exploded view of the structure of a centrifugal separation mechanism provided in some embodiments of the present application;

[0064] FIG5 is a partial enlarged view of point A in FIG3 ;

[0065] FIG6 is one of the partial structural schematic diagrams of the centrifugal separation mechanism provided in some embodiments of the present application;

[0066] FIG7 is a second schematic diagram of a partial structure of a centrifugal separation mechanism provided in some embodiments of the present application;

[0067] FIG8 is a front view of a centrifugal separation mechanism provided in some embodiments of the present application;

[0068] FIG9 is a rear view of a centrifugal separation mechanism provided in some embodiments of the present application;

[0069] FIG10 is a cross-sectional view at BB in FIG8 ;

[0070] FIG11 is a cross-sectional view of a portion CC in FIG10 ;

[0071] FIG12 is a cross-sectional view at DD in FIG10;

[0072] FIG13 is a partial enlarged view of point E in FIG10 ;

[0073] FIG14 is a partial enlarged view of point F in FIG10 ;

[0074] FIG15 is a schematic diagram of a structure of an air blast dilution mechanism according to some embodiments of the present application;

[0075] FIG16 is a second structural schematic diagram of the air blast dilution mechanism provided in some embodiments of the present application;

[0076] FIG17 is a third structural diagram of the air blast dilution mechanism provided in some embodiments of the present application;

[0077] FIG18 is a schematic structural diagram of a spray mechanism provided in some embodiments of the present application;

[0078] FIG19 is one of the structural exploded views of the spray mechanism provided in some embodiments of the present application;

[0079] FIG20 is a second exploded view of the structure of the spray mechanism provided in some embodiments of the present application;

[0080] FIG21 is a schematic diagram of the structure of an air intake pipe according to some embodiments of the present application;

[0081] FIG22 is a second schematic diagram of the structure of the air intake pipe provided in some embodiments of the present application.

[0082] Reference numerals:

[0083] Vehicle 1, battery 10, box 11, first box body 111, second box body 112, battery cell 12, processing mechanism 13, actuator 14;

[0084] Centrifugal separation mechanism 141, housing 1411, cover plate 1412, flange 14121, air inlet channel 14122, impeller 1413, impeller shaft 14131, blades 14132, rotating disk 14133, stopper 1414; air outlet 1415;

[0085] Air blast dilution mechanism 142, fan 1421, first channel 1422, second channel 1423, third channel 1424;

[0086] Spray mechanism 143, housing 1431, air inlet pipe 1432, air inlet hole 14321, seal 14322, connecting section 14323, air inlet section 14324, air outlet section 14325, sprayer 1433, air outlet pipe 1434

[0087] Pump body 15 , motor 20 , controller 30 . DETAILED DESCRIPTION

[0088] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0089] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0090] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0091] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0092] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0093] The term "multiple" in this application 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).

[0094] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. The battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0095] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a casing that encloses one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0096] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0097] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0098] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. As a core component in new energy vehicles, batteries have high requirements for both safety and cycle life.

[0099] In general power batteries, in order to obtain sufficient power for the battery, multiple battery cells are usually arranged and stacked in an arrangement within the battery housing. However, the battery cells will generate a large amount of heat during the continuous charging and discharging process, which will cause the internal temperature of the battery to rise, and the structure of multiple battery cells stacked will aggravate this phenomenon. The inventors have discovered that thermal runaway will occur when the internal temperature of the battery is abnormal. Battery thermal runaway will generate a large amount of high-temperature smoke. Usually, the solution to battery thermal runaway is to discharge the thermal runaway smoke directly out of the battery pack to stabilize the pressure inside the battery. However, high-temperature smoke can easily cause explosions or secondary injuries due to external igniters, such as personal injury, combustion of external combustibles, or damage to adjacent vehicles, which can easily cause panic among people. At the same time, firefighting operations are very difficult.

[0100] Based on the above considerations, in order to better deal with the large amount of high-temperature flue gas generated when the battery thermal runaway occurs, the inventors have designed a battery, a battery safety system and an electrical device after in-depth research. The battery includes a casing, a battery cell and at least one processing mechanism, and the casing forms an exhaust channel; the battery cell is accommodated in the casing; the processing mechanism includes a power source and an actuator, the power source is connected to the actuator, the actuator forms a processing channel, and the processing channel is connected to the exhaust channel. The power source is used to drive the actuator to act to treat the flue gas flowing through the processing channel.

[0101] In a battery of this structure, a processing mechanism is provided, which includes a power source and an actuator. When the battery is operating normally, the power source is turned off, resulting in no additional energy loss. If the battery abnormally produces a certain amount of smoke, the actuator can process the smoke to a certain extent. If the battery thermally runs away and produces a large amount of smoke, the power source drives the actuator to process the smoke to a higher degree, thereby adapting to various scenarios and effectively improving the treatment effect of the smoke. Compared with the treatment method of directly discharging high-temperature smoke from the battery, this application can reduce the harm of the battery thermal runaway smoke and significantly improve the safety of the battery.

[0102] The battery disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device.

[0103] The present invention provides an electrical device that uses a battery as a power source. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, and a spacecraft. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft.

[0104] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0105] As shown in Figure 1, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 20, a controller 30 and a battery 10 can be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 20. For example, a battery 10 can be provided at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1. For example, the battery 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery 10 can not only serve as an operating power source for the vehicle 1, but also 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.

[0106] In order to meet different power requirements, the battery 10 may include a plurality of battery cells 12 , wherein the plurality of battery cells 12 may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series and parallel connection.

[0107] FIG2 is an exploded view of the structure of a battery 10 according to one embodiment of the present application. The battery 10 comprises a housing 11 and a plurality of battery cells 12, which are housed within the housing 11. The housing 11 provides assembly space for the battery cells 12 and can have various structures. In some embodiments, the housing 11 can include a first body 111 and a second body 112, which overlap each other and together define an assembly space for accommodating the battery cells 12. The second body 112 can be a hollow structure with one end open. The first body 111 can be a plate-like structure, with the first body 111 overlapping the open side of the second body 112, so that the first and second bodies 111, 112 jointly define an assembly space. Alternatively, the first and second bodies 111, 112 can each be a hollow structure with one end open, with the open side of the first body 111 overlapping the open side of the second body 112. Of course, the box body 11 formed by the first box body 111 and the second box body 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0108] In the battery 10, the multiple battery cells 12 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 12. The multiple battery cells 12 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 12 structure is housed within the housing 11. Alternatively, the battery 10 can be constructed by first connecting multiple battery cells 12 in series, in parallel, or in a hybrid connection to form a battery 10 module. The multiple battery modules 10 are then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within the housing 11. The battery 10 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 12.

[0109] Each battery cell 12 can be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 12 can be cylindrical, flat, rectangular, or in other shapes.

[0110] According to some embodiments of the present application, the present application provides a battery 10 , which includes a housing 11 , a battery cell 12 and at least one processing mechanism 13 .

[0111] The box body 11 forms an exhaust channel; the battery cell 12 is accommodated in the box body 11; the processing mechanism 13 includes a power source and an actuator 14, the power source is connected to the actuator 14, the actuator 14 forms a processing channel, and the processing channel is connected to the exhaust channel. The power source is used to drive the actuator 14 to operate to process the flue gas flowing through the processing channel.

[0112] The processing mechanism 13 is an active component, and the actuator 14 can perform powerful processing on the flue gas by relying on external input such as a power source.

[0113] When the battery cell 12 abnormally produces a small amount of flue gas but the conditions for starting the power source are not met, the actuator 14 passively performs normal treatment on the flue gas flowing through the treatment channel to a certain extent, such as at least partially separating particulate matter from gas; when the battery cell 12 thermally runs away and produces a large amount of flue gas, causing the power source to be turned on, the power source can drive the actuator 14 to operate to strongly treat the thermal runaway flue gas to improve the treatment effect.

[0114] The power source can be a device that provides driving force, such as a motor or pump. The power source is turned off when the battery 10 is operating normally, resulting in no additional energy loss. In the event of thermal runaway, the power source is turned on when characteristic parameters of the battery 10, such as temperature, pressure, or particulate matter concentration, reach thresholds, enabling the actuator 14 to provide a stronger processing effect.

[0115] The actuator 14 can achieve at least one of the following treatment effects on the flue gas: filtering, diluting, cooling, or condensing, so as to reduce the hazards of thermal runaway flue gas.

[0116] By setting up a processing mechanism 13, the processing mechanism 13 includes a power source and an actuator 14. When the battery 10 is operating normally, the power source is turned off, and no additional energy loss is generated; when the battery 10 abnormally produces a small amount of smoke, the actuator 14 can process the smoke to a certain extent; when the battery 10 thermally runs away and produces a large amount of smoke, the power source is started to drive the actuator 14 to process the smoke to a stronger degree, thereby adapting to various scenarios and effectively improving the treatment effect of the smoke. Compared with the treatment method of directly discharging high-temperature smoke from the battery 10, this application can reduce the harm of the thermal runaway smoke from the battery 10 and significantly improve the safety of the battery 10.

[0117] According to some embodiments of the present application, referring to FIG. 3 and further referring to FIG. 4 , the actuator 14 includes a centrifugal separation mechanism 141 , in which a processing channel is formed and used to separate at least part of the particulate matter in the flue gas, and the flue gas can be cooled.

[0118] Among them, the centrifugal separation mechanism 141 can be a filter separator for separating gas and particulate matter. The centrifugal separation mechanism 141 can separate particles with larger particle sizes in the thermal runaway flue gas to reduce the particulate matter content; at the same time, the flue gas temperature can be reduced through rapid heat exchange between the flue gas, air and shell wall.

[0119] As shown in Figures 4 and 8 , centrifugal separation mechanism 141 includes a housing 1411, a cover plate 1412, and an impeller 1413. Housing 1411 is provided with an air outlet 1415 for the processing channel; cover plate 1412 is mounted on the open end of housing 1411 and is provided with an air inlet for the processing channel; impeller 1413 is rotatably mounted within the processing channel, and a power source is connected to impeller 1413 to drive its rotation.

[0120] 13 and 14 , the cover 1412 and the housing 1411 define a processing channel. The housing 1411 is provided with an air outlet 1415 for the processing channel, and the cover 1412 is provided with an air inlet for the processing channel. The air outlet 1415 connects the processing channel with the outside world, and the air inlet connects the processing channel with the exhaust channel. The treated flue gas is discharged from the battery 10 through the air outlet 1415 to improve the pressure stability inside the battery 10.

[0121] The air inlet on the cover 1412 can intercept some large particles to perform initial separation and filtration on the flue gas, reducing the content of particulate matter in the flue gas; the air outlet 1415 on the casing 1411 can intercept some particles with smaller particle sizes to further reduce the content of particulate matter in the flue gas.

[0122] Among them, the impeller 1413 is installed in the processing channel to disturb the flue gas in the processing channel. The power source drives the impeller 1413 to move at high speed to accelerate the thermal runaway flue gas. The larger particles in the flue gas collide with the inner wall of the casing 1411 due to high-speed centrifugal motion to achieve separation of the particles and the airflow.

[0123] 9 and 11 , the air outlet 1415 is provided on the bottom wall of the casing 1411 facing away from the cover plate 1412 , and there are multiple groups of air outlets 1415 , which are distributed radially apart from each other along the centrifugal separation mechanism 141 , and the flow area of ​​each air outlet 1415 is negatively correlated with the distance from the air outlet 1415 to the axis of the centrifugal separation mechanism 141 .

[0124] Among them, setting up multiple groups of air outlets 1415 can increase the ventilation area of ​​the processing channel and improve the smoothness of the airflow; multiple groups of air outlets 1415 are distributed at intervals along the radial direction of the centrifugal separation mechanism 141 to fully utilize the bottom wall space of the casing 1411, increase the ventilation area of ​​the processing channel as much as possible, and improve the treatment efficiency of the flue gas.

[0125] In this embodiment, the air outlet 1415 away from the axis of the centrifugal separation mechanism 141 has a smaller flow area, and the air outlet 1415 close to the axis of the centrifugal separation mechanism 141 has a larger flow area, so as to avoid the particulate matter from returning to the flue gas after separation, and at the same time increase the ventilation area to avoid blockage of the air outlet 1415.

[0126] The diameter of the air outlet 1415 is D1 , and the flow area of ​​the air outlet 1415 is S1 = 0.25πD12 .

[0127] Referring to Figures 6 and 7 , the inner circumferential wall of casing 1411 is provided with an inwardly protruding stopper 1414, which is used to block the movement of particulate matter. The porous plate stopper 1414 protrudes along the inner circumferential wall toward the axis of casing 1411. When particulate matter strikes the inner circumferential wall of casing 1411, stopper 1414 can collect at least some of the particulate matter, reducing the amount of particulate matter that re-enters the flue gas and achieving a separation effect.

[0128] In some embodiments, referring to FIG. 6 , the height of the stopper 1414 protruding from the inner circumferential wall of the housing 1411 is H1, which satisfies the following relationship: 1 mm ≤ H1 ≤ 30 mm.

[0129] Among them, H1 can be 1mm, 3mm, 15mm or 30mm, so as to take into account the rotation space of the impeller 1413 and the collection effect of the stopper 1414, reduce the influence of the height of the stopper 1414 on the impeller 1413, and realize both the acceleration and deflection of the flue gas and the collection effect.

[0130] In some embodiments, the following condition is satisfied: 5 mm ≤ H1 ≤ 20 mm. For example, H1 may be 5 mm, 15 mm, or 20 mm, so as to further reduce the influence of the height of the stopper 1414 on the impeller 1413 .

[0131] In some embodiments, referring to FIG6 , the stop portion 1414 is bent and forms a collection bin together with the inner circumferential wall of the casing 1411. The opening direction of the collection bin is opposite to the airflow direction in the casing 1411 to improve the storage effect of particulate matter, further reduce the amount of particulate matter re-entering the flue gas, and improve the separation effect.

[0132] In some embodiments, referring to FIG7 , the stopper 1414 is strip-shaped and distributed axially along the inner circumferential wall of the casing 1411 to increase the amount of particulate matter collected, further reduce the amount of particulate matter re-entering the flue gas, and improve the separation effect.

[0133] In some embodiments, referring to FIG. 3 and further referring to FIG. 5 , the cover plate 1412 includes a flange 14121 protruding axially inward at the edge of the air inlet, and the flange 14121 is provided with a plurality of air inlet channels 14122 spaced apart and distributed circumferentially.

[0134] By providing the flange 14121 and providing a plurality of air inlet channels 14122 on the flange 14121, the amount of flue gas entering the processing channel can be increased, thereby improving the processing efficiency.

[0135] In some embodiments, as shown in FIG14 , the air inlet channel 14122 is in an elongated shape. The elongated air inlet channel 14122 extends axially along the centrifugal separation mechanism 141 to limit the direction in which the flue gas enters the processing channel and improve the centrifugal separation effect.

[0136] The air inlet channel 14122 may be designed as a continuous slit, grid or hole to preliminarily intercept large particles in the flue gas entering the centrifugal separation mechanism 141 .

[0137] In some embodiments, as shown in FIG5 , the width of the air inlet channel 14122 is W1 , satisfying: 0.1 mm ≤ W1 ≤ 5 mm.

[0138] Among them, W1 can be 0.1mm, 1mm, 2mm, 4mm or 5mm to preliminarily intercept the flue gas entering the treatment channel.

[0139] 9 and 10 , in some embodiments, the minimum aperture of the air outlet 1415 is no greater than the width of the air inlet channel 14122 .

[0140] The following condition is satisfied: D1<W1, so that the air outlet 1415 can effectively intercept particles of smaller size in the smoke. D1 is the smallest aperture of the air outlet 1415.

[0141] In some embodiments, D1≤0.5W1, so as to further improve the interception effect of the air outlet 1415 on particles with smaller particle sizes in the smoke.

[0142] In some embodiments, as shown in FIG12 , the flange 14121 surrounds the impeller shaft 14131 of the impeller 1413 and is spaced apart from the impeller shaft 14131 ; the plurality of blades 14132 of the impeller 1413 surrounds the flange 14121 and is spaced apart from the flange 14121 .

[0143] By limiting the position and direction of the flange 14121, the impeller shaft 14131 and the blades 14132, the flue gas can flow from the air inlet channel 14122 into the processing channel along the gap between the flange 14121 and the impeller shaft 14131, and then enter between adjacent blades 14132 along the gap between the blades 14132 and the flange 14121, thereby achieving acceleration and change of direction of the flue gas when the impeller 1413 rotates.

[0144] In some embodiments, referring to FIG6 , the impeller 1413 includes: a rotating disk 14133, an impeller shaft 14131 and a plurality of blades 14132; the rotating disk 14133 is spaced apart from the inner circumferential wall and the bottom wall of the casing 1411; the blades 14132 are mounted on the rotating disk 14133; the impeller shaft 14131 is connected to the rotating disk 14133, and the plurality of blades 14132 are arranged around the impeller shaft 14131.

[0145] Among them, multiple blades 14132 are arranged around the impeller shaft 14131, which can accelerate and redirect the thermal runaway flue gas.

[0146] In some embodiments, referring to FIG. 12 , the blades 14132 are arc-shaped to enhance the effect of accelerating and redirecting the thermal runaway flue gas.

[0147] The rotating disk 14133 is used to install multiple blades 14132, and the rotating disk 14133 and the blades 14132 can cooperate to change the direction of the flue gas, so that the flue gas flows through the stopper 1414 along the extension direction of the rotating disk 14133, and then flows into the air outlet 1415 of the processing channel, thereby enhancing the separation effect.

[0148] In some embodiments, the inner wall and / or bottom wall of the casing 1411 of the centrifugal separation mechanism can be designed with a layer of sticky material, so that the particulate matter can directly adhere to the wall of the centrifugal separation mechanism after centrifugal separation, thereby increasing the separation rate of the particulate matter and reducing the possibility of the particulate matter returning to the flue gas, thereby enhancing the separation effect.

[0149] The adhesive material layer may be an adhesive, such as urea-formaldehyde resin adhesive, polyvinyl acetate adhesive, polyacrylic resin adhesive, polyurethane adhesive, hot melt adhesive, epoxy resin adhesive or synthetic adhesive.

[0150] In some embodiments, the actuator 14 includes an air dilution mechanism 142, which includes a fan 1421. The air dilution mechanism 142 forms a processing channel. The power source is connected to the fan 1421 and drives the fan 1421 to introduce air into the processing channel for diluting the flue gas.

[0151] The fan 1421 may be a centrifugal fan or other device capable of exhausting gas.

[0152] The fan 1421 can introduce air into the processing channel for diluting the flue gas. The air is mixed with the flue gas and diluted before being discharged, thereby diluting the combustible gas components in the thermal runaway flue gas, achieving flue gas cooling to a certain extent and reducing the hazards of thermal runaway flue gas.

[0153] The power source may be an electric motor.

[0154] According to some embodiments of the present application, as shown in Figures 15, 16 and 17, the processing channel includes: a first channel 1422, a second channel 1423 and a third channel 1424; the air inlet end of the first channel 1422 is connected to the exhaust channel; the fan 1421 is used to introduce air into the second channel 1423; the air outlet end of the second channel 1423 and the air inlet end of the third channel 1424 are both connected to the air outlet end of the first channel 1422.

[0155] The first channel 1422 is used to circulate the thermal runaway flue gas discharged from the exhaust channel; the second channel 1423 is used to flow the air introduced by the fan 1421; and the third channel 1424 is used to mix and dilute the thermal runaway flue gas.

[0156] The directions of the arrows in Figures 15 to 17 are the extension directions of the first channel 1422, the second channel 1423 and the third channel 1424.

[0157] According to some embodiments of the present application, referring to FIG. 15 , the following condition is satisfied: α1≤90°, where α1 is the angle between the extension direction from the outlet end to the inlet end of the second channel 1423 and the extension direction from the outlet end to the inlet end of the first channel 1422 .

[0158] Among them, α1 can be 30°, 45°, 60° or 90°, so that the thermal runaway flue gas will not be difficult to discharge due to the back pressure generated by the fan 1421.

[0159] According to some embodiments of the present application, referring to FIG. 16 , the following condition is satisfied: α2 ≥ 90°, where α2 is the angle between the extension direction from the outlet end to the inlet end of the second channel 1423 and the extension direction from the inlet end to the outlet end of the third channel 1424 .

[0160] Among them, α2 can be 90°, 120°, 180° or 360°, so that the thermal runaway flue gas will not be difficult to discharge due to the back pressure generated by the fan 1421.

[0161] According to some embodiments of the present application, referring to FIG. 17 , α1≤90° and α2≥90° are satisfied, so that the thermal runaway flue gas can be better premixed under the dilution wind of the fan 1421 without affecting the ejection of the thermal runaway flue gas in the battery 10 .

[0162] According to some embodiments of the present application, referring to FIG. 18 , and further referring to FIG. 19 and FIG. 20 , the actuator 14 includes a spraying mechanism 143 , which forms a processing channel. The power source includes a pump body 15 , which is connected to the spraying mechanism 143 and drives the spraying mechanism 143 to spray liquid into the flue gas in the processing channel.

[0163] Among them, the spraying mechanism 143 is used to spray cooling liquid on the thermal runaway flue gas. The liquid sprayed by the spraying mechanism 143 can be a cooling medium, such as water, ethanol or coolant. In the process of the thermal runaway flue gas passing through the cooling medium, the particulate matter and combustible gas in the flue gas can be adsorbed and dissolved to a certain extent, and the temperature of the flue gas can be reduced during the heat exchange or phase change of the liquid cooling medium.

[0164] The pump body 15 activates the spray mechanism 143 when the battery 10 thermally runs away, and the spray mechanism 143 sprays liquid into the flue gas in the processing channel.

[0165] According to some embodiments of the present application, referring to Figures 19 and 20, the spraying mechanism 143 includes: a shell 1431, an air inlet pipe 1432, a sprayer 1433 and an air outlet pipe 1434, the shell 1431 forms a processing channel; at least a portion of the air inlet pipe 1432 extends into the shell 1431; the pump body 15 is connected to the sprayer 1433 and drives the sprayer 1433 to spray liquid into the processing channel; the air outlet pipe 1434 is connected to the processing channel.

[0166] Among them, the air inlet pipe 1432 is used to introduce thermal runaway flue gas into the processing channel; the pump body 15 is used to drive the sprayer 1433 when the battery 10 is thermally runaway; the treated flue gas is discharged through the air outlet pipe 1434; the shell 1431 defines the processing channel to prevent leakage of the cooling liquid after spraying, thereby improving the safety of the battery 10.

[0167] According to some embodiments of the present application, referring to FIG. 19 and further referring to FIG. 22 , the portion of the air inlet pipe 1432 extending into the shell 1431 is provided with a plurality of air inlet holes 14321 , and the thermal runaway flue gas enters the treatment channel from the plurality of air inlet holes 14321 . The thermal runaway flue gas is divided into a plurality of flue gases by the plurality of air inlet holes 14321 , thereby increasing the contact area between the thermal runaway flue gas and the cooling liquid and improving the treatment effect.

[0168] According to some embodiments of the present application, referring to FIG. 21 , the air inlet hole 14321 is provided with a seal 14322 for sealing the air inlet hole 14321 , and the seal 14322 is configured to fail when the pressure of the air inlet pipe 1432 reaches a target pressure and / or the temperature reaches a target temperature.

[0169] Among them, the seal 14322 is used to seal the air inlet hole 14321 when the pressure and / or temperature in the air inlet pipe 1432 is normal, so as to prevent the cooling liquid from entering the air inlet pipe 1432 from the air inlet hole 14321, thereby improving the sealing performance of the battery 10 during normal operation; the seal 14322 fails under specific conditions, so that the thermal runaway flue gas enters the processing channel from the air inlet.

[0170] The seal 14322 may be a plastic film, such as a PP film or a PE film, or a semipermeable membrane having a selective isolation effect on the cooling medium, that is, the pore size of the semipermeable membrane is smaller than the pore size of the cooling medium particles.

[0171] When the battery 10 thermally runs away, the thermal runaway flue gas enters the intake pipe 1432, and the pressure and temperature of the intake pipe 1432 will increase. When the pressure of the intake pipe 1432 reaches the target pressure and / or the temperature reaches the target temperature, the seal 14322 fails, and the thermal runaway flue gas enters the shell 1431. The pump body 15 drives the sprayer 1433, and the sprayer 1433 sprays cooling liquid on the thermal runaway flue gas. The thermal runaway flue gas contacts the cooling liquid, and the particulate matter and combustible gas in the flue gas can be adsorbed and dissolved to a certain extent, and the temperature of the flue gas can be reduced during the heat exchange or phase change of the liquid cooling medium.

[0172] According to some embodiments of the present application, a filter element for filtering at least part of the particulate matter is provided in the air intake pipe 1432 to preliminarily intercept the particulate matter in the thermal runaway flue gas.

[0173] The filter element may be a filter mesh, and the diameter of the filter holes on the filter element is set according to the particle size of the particulate matter to be filtered.

[0174] According to some embodiments of the present application, referring to Figures 21 and 22, the air intake pipe 1432 includes: an air intake section 14324, a connecting section 14323 and an air outlet section 14325 connected in sequence, the air outlet section 14325 is located in the shell 1431, and the air intake section 14324 is higher than the air outlet section 14325 to prevent cooling liquid from flowing into the battery 10 from the air intake section 14324, thereby improving the reliability of the battery 10.

[0175] According to some embodiments of the present application, the actuator 14 includes a centrifugal separation mechanism 141 and a spray mechanism 143 arranged in sequence along the direction from the exhaust passage to the outside.

[0176] The centrifugal separation mechanism 141 forms a processing channel, which is used to separate at least part of the particulate matter in the flue gas; the spray mechanism 143 forms a processing channel, and the power source includes a pump body 15, which is connected to the spray mechanism 143 and drives the spray mechanism to spray liquid into the flue gas in the processing channel.

[0177] The centrifugal separation mechanism 141 generally performs preliminary filtration of flue gas containing larger particles and powders, and preliminary cooling of high-temperature flue gas. The spray mechanism 143 generally adsorbs / absorbs flue gas still containing fine dust and combustible mist, and achieves rapid cooling of the smoke through liquid scrubbing and spray scrubbing.

[0178] In this embodiment, the centrifugal separation mechanism 141 is used to perform preliminary screening and preliminary cooling of the smoke, and then the spray mechanism 143 is used to absorb fine powder / mist / combustible gas from the smoke after preliminary treatment.

[0179] According to some embodiments of the present application, the actuator 14 includes a centrifugal separation mechanism 141 , a spray mechanism 143 , and an air blast dilution mechanism 142 , which are sequentially arranged along a direction from the exhaust passage to the outside.

[0180] The centrifugal separation mechanism 141 forms a processing channel, and the centrifugal separation mechanism 141 is used to separate at least part of the particulate matter in the flue gas; the spray mechanism 143 forms a processing channel, and the power source includes a pump body 15, and the pump body 15 is connected to the spray mechanism 143 and drives the spray mechanism to spray liquid into the flue gas in the processing channel; the air dilution mechanism 142 includes a fan 1421, and forms a processing channel, and the power source is connected to the fan 1421 and drives the fan 1421 to introduce air for diluting the flue gas into the processing channel.

[0181] The air dilution mechanism 142 is generally used to dilute smoke containing high concentrations of flammable components, and simultaneously quickly lowers the temperature of the smoke by mixing it with normal temperature / low temperature air.

[0182] In this embodiment, the centrifugal separation mechanism 141 and the spray mechanism 143 cannot completely process the smoke from some batteries 10 that generate gas at a high rate. Adding the air dilution mechanism 142 can minimize the flammability of the smoke.

[0183] According to some embodiments of the present application, the present application also provides a battery safety system, including: a control system, a power supply system and a battery 10 as any one of the above; the control system is electrically connected to the processing mechanism 13; the power supply system is electrically connected to the processing mechanism 13.

[0184] The control system is configured to output alarm information indicating thermal runaway of the battery 10 and output control instructions to the processing unit 13 when determining that thermal runaway of the battery 10 occurs, and control the power supply system to provide power.

[0185] After the battery 10 thermally runs away, characteristic parameters such as pressure or temperature inside the battery 10 change. After detecting the change in characteristic parameters, the control system generates an alarm message to control the processing mechanism 13 to start, and controls the power supply system to provide power to the power source of the processing mechanism 13. The power source drives the actuator 14 to process the thermal runaway flue gas in real time, thereby reducing the degree of harm caused by the flue gas.

[0186] In some embodiments, the power supply system may be a high-voltage system corresponding to the battery 10 and / or a low-voltage system outside the battery 10 .

[0187] The high-voltage system can provide the processing mechanism 13 with a higher working power supply to ensure efficient startup of the processing system. However, when a thermal runaway event occurs in the battery 10, the entire high-voltage system connection is prone to damage and failure. The low-voltage system power supply is designed outside the battery 10 and is not easily damaged.

[0188] In some embodiments, the control system includes a battery management system; or, the control system includes a vehicle controller; or, the control system includes a battery management system and a vehicle controller.

[0189] The advantage of using a battery management system for control is that the behavior chain is short and the response can be faster. However, the battery management system may be at risk of being damaged after a thermal runaway of the battery 10. The vehicle controller is designed to be outside the battery 10. When a thermal runaway event occurs in the battery 10, it can ensure that the control system can operate normally, thereby improving the reliability of the battery safety system.

[0190] The control chain design of the battery safety system includes at least the following control logic routes:

[0191] Route 1: After the battery management system provides an alarm signal, the battery management system provides an instruction to control the processing mechanism 13 to start working, and the corresponding high-voltage system of the entire package provides the processing mechanism 13 to turn on the required power supply, and the corresponding processing mechanism 13 responds normally and starts.

[0192] Route 2: After the battery management system provides an alarm signal, the battery management system provides an instruction to control the processing mechanism 13 to start working, and the corresponding vehicle low-voltage system provides the processing mechanism 13 with the required power supply, and the corresponding processing mechanism 13 responds normally and starts.

[0193] Route 3: After the battery management system provides an alarm signal, the vehicle controller provides an instruction to control the processing mechanism 13 to start working, and the corresponding high-voltage system of the entire package provides the processing mechanism 13 to turn on the required power supply, and the corresponding processing mechanism 13 responds normally and starts.

[0194] Route 4: After the battery management system provides an alarm signal, the vehicle controller provides an instruction to control the processing mechanism 13 to start working, and the corresponding vehicle low-voltage system provides the processing mechanism 13 with the required power supply, and the corresponding processing mechanism 13 responds normally and starts.

[0195] In summary, after the general battery management system issues an alarm message, the battery management system or the vehicle controller can serve as the control strategy core for starting the processing mechanism 13, and the power required to start the processing mechanism 13 can be supplied by the power system.

[0196] The above four control logic routes can be used in parallel, with route one generally being the first response priority, and the remaining routes can be set as auxiliary routes. When it is detected that the battery management system cannot work normally or the high-voltage system cannot supply power normally, the vehicle controller and the low-voltage system can serve as backup control mechanisms and energy mechanisms to provide assistance, so as to improve the reliability of the battery safety system and improve the safety of battery 10.

[0197] In some embodiments, the control system includes: a battery management system and a vehicle controller.

[0198] The battery management system is configured to output a control instruction to the processing unit 13 and output a first message containing thermal runaway of the battery 10 to the vehicle controller when it determines that the battery 10 has thermal runaway; the battery management system is configured to output a second message to the vehicle controller when it outputs a control instruction to the processing unit 13; and the vehicle controller is configured to output a control instruction to the processing unit 13 when it does not receive the second message after a first target time has passed since receiving the first message.

[0199] Among them, the vehicle controller is configured to not receive the second information after the first target time from receiving the first information, indicating that the battery management system is damaged, and the vehicle controller outputs a control instruction to the processing unit 13 to control the processing unit 13 to start processing the thermal runaway flue gas.

[0200] The processing mechanism 13 is provided with dual control of the battery management system and the vehicle controller. After the battery management system of the battery 10 is destroyed due to thermal runaway, the vehicle controller can control the processing mechanism 13 to start, so that the control system can work normally when a thermal runaway event occurs in the battery 10, thereby improving the reliability of the battery safety system.

[0201] According to some embodiments of the present application, the present application further provides an electrical device, including the battery 10 of any of the above solutions, or a battery safety system such as any of the above solutions, wherein the battery 10 is used to provide electrical energy to the electrical device.

[0202] Since the battery 10 of any of the above schemes has a processing mechanism 13, the risk of thermal runaway smoke from the battery 10 can be reduced, and the safety formation of the battery 10 can be improved, so that the electrical devices including the battery 10 also have good safety performance; since the battery safety system of any of the above schemes is relatively reliable, the safety performance of the battery 10 can be improved, so that the electrical devices including the battery safety system also have good safety performance.

[0203] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0204] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, characterized in that: include: a box body, wherein the box body forms an exhaust passage; a battery cell, the battery cell being housed in the box; At least one processing mechanism, the processing mechanism includes a power source and an actuator, the power source is connected to the actuator, the actuator forms a processing channel, the processing channel is connected to the exhaust channel, and the power source is used to drive the actuator to act to process the flue gas flowing through the processing channel.

2. The battery according to claim 1, characterized in that The actuator includes a centrifugal separation mechanism, which forms the processing channel and is used to separate at least part of the particulate matter in the flue gas.

3. The battery according to claim 2, characterized in that The centrifugal separation mechanism comprises: a casing, wherein the casing is provided with an air outlet of the processing channel; a cover plate, the cover plate being mounted on the open end of the housing and provided with an air inlet of the processing channel; An impeller is rotatably mounted in the processing channel, and the power source is connected to the impeller and is used to drive the impeller to rotate.

4. The battery according to claim 3, characterized in that The air outlet is arranged on the bottom wall of the casing away from the cover plate. The air outlet is divided into multiple groups, and the multiple groups of air outlets are distributed at intervals along the radial direction of the centrifugal separation mechanism, and the flow area of ​​each air outlet is negatively correlated with the distance from the air outlet to the axis of the centrifugal separation mechanism.

5. The battery according to claim 3 or 4, characterized in that An inner peripheral wall of the housing is provided with an inwardly protruding stopper, and the stopper is used to block the movement of particles.

6. The battery according to claim 5, characterized in that The stopping portion is in a strip shape.

7. The battery according to claim 6, characterized in that The height of the stopper protruding from the inner peripheral wall of the housing is H1, which satisfies the following conditions: 1mm≤H1≤30mm.

8. The battery according to any one of claims 5 to 7, characterized in that The stopper is bent and forms a collection bin together with the inner peripheral wall of the housing. The opening direction of the collection bin is opposite to the airflow direction in the housing.

9. The battery according to any one of claims 3 to 8, characterized in that The cover plate includes a flange protruding axially inwardly at the edge of the air inlet, and the flange is provided with a plurality of air inlet channels distributed and spaced apart along the circumferential direction.

10. The battery according to claim 9, characterized in that The air intake channel is in an elongated strip shape.

11. The battery according to claim 10, characterized in that The width of the air intake channel is W1, which satisfies: 0.1 mm ≤ W1 ≤ 5 mm.

12. The battery according to any one of claims 9 to 11, characterized in that The minimum aperture of the air outlet is not greater than the width of the air inlet channel.

13. The battery according to any one of claims 9 to 12, characterized in that The flange surrounds the impeller shaft of the impeller and is spaced apart from the impeller shaft; the plurality of blades of the impeller surrounds the flange and are spaced apart from the flange.

14. The battery according to any one of claims 3 to 13, characterized in that The impeller comprises: a rotating disk, the rotating disk being spaced apart from the inner peripheral wall and the bottom wall of the housing; a plurality of blades, wherein the blades are mounted on the rotating disk; An impeller shaft is connected to the rotating disk, and the plurality of blades are arranged around the impeller shaft.

15. The battery according to any one of claims 1 to 14, characterized in that The actuator includes an air blast dilution mechanism, which includes a fan and forms the processing channel. The power source is connected to the fan and drives the fan to introduce air for diluting the flue gas into the processing channel.

16. The battery according to claim 15, characterized in that The processing channel includes: a first channel, wherein an air inlet end of the first channel is in communication with the exhaust channel; a second channel, the fan being used to introduce air into the second channel; The third channel, the air outlet end of the second channel and the air inlet end of the third channel are both connected to the air outlet end of the first channel.

17. The battery according to claim 16, characterized in that Satisfies: α1≤90°, wherein α1 is the angle between the extending direction from the air outlet end to the air inlet end of the second channel and the extending direction from the air outlet end to the air inlet end of the first channel.

18. The battery according to claim 16 or 17, characterized in that Satisfies: α2 ≥ 90°, wherein α2 is the angle between the extending direction from the air outlet end to the air inlet end of the second channel and the extending direction from the air inlet end to the air outlet end of the third channel.

19. The battery according to any one of claims 1 to 18, characterized in that The actuator includes a spray mechanism, which forms the processing channel. The power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid onto the flue gas in the processing channel.

20. The battery according to claim 19, characterized in that The spray mechanism comprises: a housing forming the processing channel; an air intake pipe, at least a portion of which extends into the housing; a sprayer, the pump body being connected to the sprayer and driving the sprayer to spray liquid into the processing channel; An air outlet pipe is connected to the processing channel.

21. The battery according to claim 20, characterized in that The portion of the air inlet pipe extending into the shell is provided with a plurality of air inlet holes.

22. The battery according to claim 21, characterized in that The air inlet hole is provided with a sealing member for sealing the air inlet hole, and the sealing member is configured to fail when the pressure of the air inlet pipe reaches a target pressure and / or the temperature reaches a target temperature.

23. The battery according to claim 21 or 22, characterized in that A filter element is provided in the air intake pipe for filtering at least part of the particulate matter.

24. The battery according to any one of claims 21 to 23, characterized in that The air inlet pipe comprises an air inlet section, a connecting section and an air outlet section which are connected in sequence. The air outlet section is located in the shell, and the air inlet section is higher than the air outlet section.

25. The battery according to any one of claims 1 to 24, characterized in that The actuator includes a centrifugal separation mechanism and a spray mechanism arranged in sequence along the direction from the exhaust passage to the outside; The centrifugal separation mechanism forms the processing channel for separating at least part of the particulate matter in the flue gas; The spray mechanism forms the processing channel, and the power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid onto the flue gas in the processing channel.

26. The battery according to any one of claims 1 to 24, characterized in that The actuator includes a centrifugal separation mechanism, a spray mechanism and an air blast dilution mechanism arranged in sequence along the direction from the exhaust passage to the outside; The centrifugal separation mechanism forms the processing channel, which is used to separate at least part of the particulate matter in the flue gas; the spray mechanism forms the processing channel, and the power source includes a pump body, which is connected to the spray mechanism and drives the spray mechanism to spray liquid into the flue gas in the processing channel; the air dilution mechanism includes a fan and forms the processing channel, and the power source is connected to the fan and drives the fan to introduce air for diluting the flue gas into the processing channel.

27. A battery safety system, characterized in that: include: The battery according to any one of claims 1 to 26; a control system, the control system being electrically connected to the processing mechanism; A power supply system, the power supply system is electrically connected to the processing mechanism; wherein, The control system is configured to, when determining that the battery has thermal runaway, output alarm information indicating the battery has thermal runaway, output a control instruction to the processing mechanism, and control the power supply system to provide power.

28. The battery safety system according to claim 27, characterized in that: The control system includes a battery management system; And / or, the control system includes a vehicle controller.

29. The battery safety system according to claim 27, wherein: The control system includes the battery management system and the vehicle controller. The battery management system is configured to output a control instruction to the processing mechanism and output first information containing battery thermal runaway to the vehicle controller when it determines that the battery has thermal runaway; the battery management system is configured to output second information to the vehicle controller when it outputs a control instruction to the processing mechanism; and the vehicle controller is configured to output a control instruction to the processing mechanism when it does not receive the second information after a first target time has passed since receiving the first information.

30. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 26, or the battery safety system according to any one of claims 27 to 29, wherein the battery is used to provide electrical energy to the electrical device.

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