Battery and electric device

Abstract

A battery and an electric device, relating to the technical field of batteries. The battery comprises a case, a battery cell and a treatment mechanism. The case forms an exhaust channel; the battery cell is accommodated in the case; the treatment mechanism forms a treatment channel and comprises at least one treatment module arranged at the treatment channel, the treatment channel is communicated with the exhaust channel and the external environment, and the treatment module is used for treating fumes flowing through the treatment channel.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202410264203.5 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 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 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, which includes a casing, a battery cell, and a processing mechanism; the casing forms an exhaust channel; the battery cell is accommodated in the casing; the processing mechanism forms a processing channel and includes at least one processing module arranged at the processing channel, the processing channel is connected to the exhaust channel and the outside world, and the processing module is used to process the flue gas flowing through the processing channel.

[0009] In the above technical solution, a processing channel is set between the exhaust channel and the outside world, and the processing channel includes at least one processing module for processing the flue gas. The processing module can have one or more functions of filtering, cooling, adsorption and absorption, so as to achieve filtering of solid particulate matter in the thermal runaway flue gas, condensation and / or absorption of liquid mist and combustible components in the thermal runaway flue gas, cooling and condensation of the thermal runaway flue gas for different scenarios, thereby reducing the hazards of the thermal runaway flue gas and improving the safety of the battery through multiple treatments of the thermal runaway flue gas.

[0010] In some embodiments, the processing module includes a first filter module including a plurality of partitions spaced apart along an extension direction of the processing channel.

[0011] In some embodiments, a storage trough is provided on an inner wall of the processing channel, and the storage trough is located on a side of the partition facing the exhaust channel.

[0012] In some embodiments, each of the partitions is provided with a filter hole, and the flow area of ​​the filter hole is negatively correlated with the minimum distance from the partition where the filter hole is located to the exhaust channel.

[0013] In some embodiments, the following condition is satisfied: 0.05 mm ≤ C1 ≤ 5 mm; wherein C1 is the diameter of the filter hole of the partition farthest from the exhaust channel among the plurality of partitions.

[0014] In some embodiments, any of the partitions has a side edge spaced apart from the inner wall of the processing channel to form a vent between the partition and the inner wall of the processing channel, and the union of the projections of the multiple partitions along the extension direction of the processing channel covers the processing channel.

[0015] In some embodiments, the union of the projections of any two adjacent partitions along the extension direction of the processing channel covers the processing channel;

[0016] And / or, the projections of any two adjacent partitions along the extension direction of the processing channel intersect.

[0017] In some embodiments, the area of ​​any of the partitions is greater than half of the cross-sectional area of ​​the processing channel in the region where the partition is located.

[0018] In some embodiments, the multiple partitions are divided into multiple groups, and the multiple partitions in each group are arranged opposite each other along the extension direction of the processing channel. The partitions of different groups are spaced apart around the circumference of the processing channel, and the partitions of different groups are staggered along the extension direction of the processing channel.

[0019] In some embodiments, the processing module includes a second filter module, and the second filter module includes a dust removal bag.

[0020] In some embodiments, the dust removal bag is provided with a plurality of air holes, satisfying: C2≤500 μm; wherein C2 is the diameter of the air holes.

[0021] In some embodiments, the processing module includes a cooling module, and the cooling module includes a heat exchanger capable of performing heat exchange with the flue gas in the processing channel, and the heat exchanger is used to circulate a heat exchange medium.

[0022] In some embodiments, one of the heat exchanger and the process channel comprises a coiled tubing positioned within the other of the heat exchanger and the process channel.

[0023] In some embodiments, the heat exchanger includes multiple sections of air guide tubes and collecting tubes connecting the air guide tubes, the cross-sectional area of ​​the collecting tubes is larger than the cross-sectional area of ​​the air guide tubes, and the heat exchanger is located in the processing channel.

[0024] In some embodiments, the processing module includes a cooling module, which includes a water storage chamber provided on the top wall of the processing channel, and the bottom wall of the water storage chamber is provided with an opening mechanism, and the opening mechanism is configured to open when the pressure of the processing channel reaches the target pressure and / or the temperature reaches the target temperature. When the opening mechanism is opened, the water in the water storage chamber flows out into the processing channel.

[0025] In some embodiments, the bottom wall of the water storage chamber is provided with a gap, the opening mechanism comprises a seal for sealing the gap, and the seal is configured to fail when the pressure of the treatment channel reaches a target pressure and / or the temperature reaches a target temperature;

[0026] Alternatively, the bottom wall of the water storage chamber is provided with a weakening groove, the opening mechanism includes the bottom wall of the weakening groove, and the bottom wall of the weakening groove is configured to rupture when the pressure of the processing channel reaches the target pressure and / or the temperature reaches the target temperature.

[0027] In some embodiments, the following condition is satisfied: L1≤5 mm; wherein L1 is the width of the gap or the weakened groove.

[0028] In some embodiments, the water inlet and the water outlet of the water storage chamber are both connected to the liquid cooling system of the battery.

[0029] In some embodiments, the processing module includes an adsorption module, which is used to adsorb liquid and / or combustible gas in the flue gas.

[0030] In some embodiments, the adsorption module includes an encapsulation layer and an adsorption substance located in the encapsulation layer.

[0031] In some embodiments, the adsorbent material comprises a microporous adsorbent material; and / or, the adsorbent material comprises a chemical adsorbent material.

[0032] In some embodiments, there are multiple processing modules, and the multiple processing modules are sequentially spaced apart and arranged along the processing channel.

[0033] In some embodiments, the processing module includes a first filtering module, a cooling module, and an adsorption module arranged in sequence along the direction from the exhaust passage to the outside.

[0034] In some embodiments, the processing module includes a first filter module, a cooling module, an adsorption module, and a second filter module arranged in sequence along the direction from the exhaust channel to the outside, and the filtering granularity of the second filter module is smaller than that of the first filter module.

[0035] In some embodiments, the processing module includes a first cooling module, a second cooling module, and an adsorption module sequentially arranged along the direction from the exhaust passage to the outside, and the temperature of the second cooling module is lower than that of the first cooling module.

[0036] In some embodiments, the processing mechanism is installed inside the box; or, the processing mechanism is installed outside the box.

[0037] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery as described in any one of the above, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0040] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0041] FIG3 is a schematic diagram of the structure of a processing mechanism provided in some embodiments of the present application;

[0042] FIG4 is a schematic diagram of the structure of a first filtering module according to some embodiments of the present application;

[0043] FIG5 is a second structural diagram of a first filtering module provided in some embodiments of the present application;

[0044] FIG6 is a third structural diagram of the first filtering module provided in some embodiments of the present application;

[0045] FIG7 is a fourth structural diagram of the first filtering module provided in some embodiments of the present application;

[0046] FIG8 is a schematic diagram of the structure of a second filtering module according to some embodiments of the present application;

[0047] FIG9 is a second structural diagram of a second filtering module provided in some embodiments of the present application;

[0048] FIG10 is a schematic diagram of a structure of a cooling module provided in some embodiments of the present application;

[0049] FIG11 is a second structural schematic diagram of a cooling module provided in some embodiments of the present application;

[0050] FIG12 is a third structural diagram of a cooling module provided in some embodiments of the present application;

[0051] FIG13 is a fourth structural diagram of a cooling module provided in some embodiments of the present application;

[0052] FIG14 is a top view of a second cooling module provided in some embodiments of the present application;

[0053] FIG15 is a cross-sectional view taken along line AA in FIG14 ;

[0054] FIG16 is one of the partial enlarged views of point B in FIG15 ;

[0055] FIG17 is a second partial enlarged view of point B in FIG15;

[0056] FIG18 is a third partial enlarged view of point B in FIG15 .

[0057] Figure numerals: Vehicle 1, battery 10, box body 11, first box body 111, second box body 112, battery cell 12, processing mechanism 13; First filter module 131, partition 1311, filter hole 13111, storage tank 1312; Second filter module 132, dust removal bag 1321, air vent 1322; First cooling module 133, heat exchanger 1331, air duct 13311, collecting pipe 13312; Second cooling module 134, water storage chamber 1341, water inlet 13411, water outlet 13412, gap 1343, weakening groove 1344, sealing film 13441, filler 13442; Adsorption module 135, processing channel 136, motor 20, controller 30. DETAILED DESCRIPTION

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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).

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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 and an electrical device after in-depth research. The battery includes a casing, a battery cell and a processing mechanism; the casing forms an exhaust channel; the battery cell is accommodated in the casing; the processing mechanism forms a processing channel and includes at least one processing module arranged at the processing channel. The processing channel is connected to the exhaust channel and the outside world, and the processing module is used to treat the flue gas flowing through the processing channel.

[0071] In a battery of this structure, a processing mechanism is provided between the exhaust channel and the outside world, so that the processing mechanism can process the flue gas flowing through the processing channel. When a large amount of high-temperature flue gas generated by thermal runaway of the battery flows from the exhaust channel into the processing channel, it will be processed by at least one processing module at the processing channel. The high-temperature flue gas is discharged from the battery after being processed. Compared with the treatment method of directly discharging the high-temperature flue gas from the battery, the present application can significantly improve the safety of the battery and stabilize the pressure inside the battery.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] FIG2 is an exploded view of the structure of a battery 10 according to an embodiment of the present application. The battery 10 includes a housing 11 and a plurality of battery cells 12, which are intended to be housed within the housing 11. The housing 11 is configured to provide assembly space for the battery cells 12, and the housing 11 can have a variety of structures. In some embodiments, the housing 11 can include a first housing body 111 and a second housing body 112, which overlap each other and together define an assembly space for accommodating the battery cells 12. The second housing body 112 can be a hollow structure with one end open. The first housing body 111 can be a plate-like structure, with the first housing body 111 overlapping the open side of the second housing body 112, so that the first housing body 111 and the second housing body 112 jointly define an assembly space. Alternatively, the first housing body 111 and the second housing body 112 can each be a hollow structure with one end open, with the open side of the first housing body 111 overlapping the open side of the second housing 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.

[0078] 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.

[0079] 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.

[0080] The battery cells 12 generate a lot of heat during the continuous charging and discharging process. When the battery cells 12 are in thermal runaway, a lot of smoke will be generated. The smoke will be discharged from the box body 11 through the exhaust channel to reduce the pressure in the box body 11 and avoid the battery 10 from exploding.

[0081] According to some embodiments of the present application, referring to FIG3 and further referring to FIG4, FIG3 is a schematic structural diagram of a processing mechanism 13 provided in some embodiments of the present application. The present application provides a battery 10, which includes a housing 11, a battery cell 12, and a processing mechanism 13; the housing 11 forms an exhaust passage; the battery cell 12 is accommodated within the housing 11; the processing mechanism 13 forms a processing passage 136 and includes at least one processing module disposed in the processing passage 136, which is in communication with the exhaust passage and the outside world, and the processing module is used to process the flue gas flowing through the processing passage 136.

[0082] The processing mechanism 13 is arranged between the exhaust channel and the outside world. The thermal runaway flue gas flows through the exhaust channel and the processing channel 136 in turn and is discharged into the outside world. At least one processing module is provided in the processing channel 136. At least one processing module is used to process the thermal runaway flue gas flowing through the processing channel 136 to reduce the hazards of the thermal runaway flue gas.

[0083] The processing mechanism 13 is a passive component and can perform its processing function without relying on external input such as a power source. The processing mechanism 13 can passively perform its function of processing the flue gas when the battery 10 generates a large amount of flue gas due to thermal runaway.

[0084] According to the battery 10 provided in the embodiment of the present application, a processing channel 136 is provided between the exhaust channel and the outside world. The processing channel 136 includes at least one processing module for treating the flue gas. The processing module can have one or more functions of filtering, cooling, adsorption and absorption to achieve filtering of solid particulate matter in the thermal runaway flue gas, condensation and / or absorption of liquid mist and combustible components in the thermal runaway flue gas, cooling and condensation of the thermal runaway flue gas, thereby reducing the hazards of the thermal runaway flue gas and improving the safety of the battery 10 through multiple treatments of the thermal runaway flue gas.

[0085] According to some embodiments of the present application, referring to FIG. 4 and further referring to FIG. 5 , the processing module includes a first filter module 131 , and the first filter module 131 includes a plurality of partitions 1311 spaced apart along an extension direction of the processing channel 136 .

[0086] Among them, the partition 1311 forms an angle with the flow direction of the flue gas, for example, the partition 1311 is perpendicular to the flow direction of the flue gas or forms an acute angle to decelerate the flue gas, and in the deceleration process, the solid particles in the flue gas collide with the partition 1311, and the solid particles in the flue gas produce a certain degree of gas-matter separation due to the action of gravity, thereby intercepting the solid particles in the flue gas, thereby reducing the content of solid particles in the flue gas, thereby reducing the secondary hazards caused by thermal runaway flue gas.

[0087] The number, size, shape of the partitions 1311 and the spacing between adjacent partitions 1311 can be set accordingly according to the extension length of the processing channel 136 and the flow speed of the flue gas.

[0088] In this embodiment, at least one side of the partition 1311 is spaced from the inner wall of the processing channel 136 , or the partition 1311 has holes, so that the flue gas can flow along the processing channel 136 .

[0089] According to some embodiments of the present application, referring to Figure 4 and further referring to Figure 5, any partition 1311 has a side separated from the inner wall of the processing channel 136 to form a vent between the partition 1311 and the inner wall of the processing channel 136, and the union of the projections of multiple partitions 1311 along the extension direction of the processing channel 136 covers the processing channel 136.

[0090] Each partition 1311 has at least one side separated from the inner wall of the processing channel 136. For example, one side, two adjacent sides, two opposite sides, or three adjacent sides of the partition 1311 may be separated from the inner wall of the processing channel 136. That is, at least a portion of each partition 1311 is separated from the inner wall of the processing channel 136 to form a vent, so that the processing channel 136 is connected and the smoke can circulate.

[0091] Among them, the union of the projections of multiple partitions 1311 along the extension direction of the processing channel 136 covers the processing channel 136, that is, the vents formed by the multiple partitions 1311 are not distributed in a straight line, so that the flue gas can be intercepted by at least one partition 1311 during the flow process and the flow path is changed. The solid particles in the flue gas collide with the partition 1311 and are separated from the airflow, thereby reducing the content of solid particles in the flue gas, thereby reducing the external fire caused by the direct spraying of high-temperature particles out of the battery 10 or secondary disasters caused by the destruction of the insulation protection in the entire package.

[0092] In this embodiment, multiple partitions 1311 can be staggered up and down or left and right, for example, the front air vent is located on the upper side of the processing channel 136, and the rear air vent is located at the lower part of the processing channel 136, or the front air vent is located on the left side of the processing channel 136, and the rear vent is located on the right side of the processing channel 136, that is, the multiple air vents are staggered along the extension direction of the processing channel 136, so that the flue gas can flow in a serpentine path along the multiple staggered air vents, so as to have a certain interception effect on solid particulate matter in the flue gas.

[0093] According to some embodiments of the present application, the area of ​​any partition 1311 is larger than half of the cross-sectional area of ​​the processing channel 136 in the area where the partition 1311 is located, that is, the vent area is smaller than half of the cross-sectional area of ​​the processing channel 136, so as to increase the length and curvature of the flow path of the flue gas, and the flue gas can be intercepted multiple times to improve the interception effect.

[0094] A vent is formed between the partition 1311 and the wall of the processing channel 136 , and a flow area S2 of the vent is not less than half of a flow area S1 of the channel between the partition 1311 and the adjacent partition 1311 .

[0095] The surface where the flow area is located is perpendicular to the flow direction of the airflow. The area of ​​the single partition 1311 that does not cover the processing channel 136 forms a vent.

[0096] As shown in FIG4 , in this embodiment, the airflow direction of the vent is the Y direction, and the airflow area of ​​the vent is the area of ​​the XOZ plane perpendicular to the Y direction. The airflow direction of the channel between the partition 1311 and the adjacent partition 1311 is the Z direction, and the airflow area of ​​the channel is the area of ​​the XOY plane perpendicular to the Z direction.

[0097] The height L4 of the vent at any partition 1311 (the distance between the partition 1311 and the wall of the processing channel 136 that is not connected to the partition 1311) is not less than half of the distance between the partition 1311 and the adjacent partition 1311.

[0098] The height of the vent is in the Z direction, and the partition 1311 is spaced apart from the adjacent partitions 1311 along the Y direction.

[0099] In some embodiments, as shown in Figure 4, the extension direction of the processing channel 136 is set to the Y direction, a plurality of partitions 1311 are spaced apart and distributed along the Y direction, the vertical direction of the cross-section of the processing channel 136 is the Z direction, the horizontal direction of the cross-section of the processing channel 136 is the X direction, and the partition 1311 is arranged parallel to the cross-section of the processing channel 136.

[0100] Among them, multiple partitions 1311 satisfy: S2≥0.5*S1, S1=L2*L3, S2=L2*L4; wherein, S2 is the area of ​​the vent; S1 is the flow area at the channel between adjacent partitions, L2 is the distance between two adjacent partitions 1311 along the extension direction of the processing channel 136, L3 is the length of the partition 1311 in the X direction, and L4 is the height of the vent along the Z direction.

[0101] In this embodiment, by setting the area between two adjacent partitions 1311 and the area of ​​the vent, the probability of poor airflow caused by excessive back pressure in the processing channel 136 due to the partitions 1311 being too dense can be reduced, thereby improving the smoothness of the airflow.

[0102] According to some embodiments of the present application, the union of the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 covers the processing channel 136; and / or, the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 have an intersection.

[0103] In this embodiment, the relationship between the projection of any two adjacent partitions 1311 along the extension direction of the processing channel 136 and the processing channel 136 includes at least the following three types:

[0104] First, the union of the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 covers the processing channel 136.

[0105] In this embodiment, any two adjacent partitions 1311 are staggered, and the union of their projections is greater than or equal to the cross-sectional area of ​​the processing channel 136, that is, the vents formed by the two adjacent partitions 1311 are staggered to achieve the interception effect of each partition 1311 on the flue gas, so that the flue gas flow can flow in a serpentine path along the multiple staggered vents in sequence, thereby improving the interception effect.

[0106] Secondly, the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 intersect.

[0107] In this embodiment, along the extension direction of the processing channel 136, the sum of the projected areas of the two adjacent partitions 1311 is greater than the cross-sectional area of ​​the processing channel 136, thereby reducing the area of ​​the vent and extending the flow path of the flue gas from the previous vent to the next adjacent vent, thereby increasing the length and curvature of the total flow path of the flue gas and improving the interception effect.

[0108] Third, the union of the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 covers the processing channel 136, and the projections of any two adjacent partitions 1311 along the extension direction of the processing channel 136 have an intersection.

[0109] In this embodiment, the vents formed by any two adjacent partitions 1311 are staggered, and the flow path of the smoke from the previous vent to the next adjacent vent is extended, thereby further increasing the length and curvature of the total flow path of the smoke and improving the interception effect.

[0110] In some embodiments, multiple partitions 1311 are divided into multiple groups, and the multiple partitions 1311 in each group are arranged opposite each other along the extension direction of the processing channel 136. The partitions 1311 of different groups are spaced apart around the circumference of the processing channel 136, and the partitions 1311 of different groups are staggered along the extension direction of the processing channel 136.

[0111] The plurality of groups of partitions 1311 are staggeredly distributed, and the distribution positions and specifications of the plurality of partitions 1311 in each group are the same.

[0112] For example, multiple partitions 1311 are divided into two groups distributed up and down, the upper side of one group of partitions 1311 is connected to the top wall of the processing channel 136, and the lower side of the other group of partitions 1311 is connected to the bottom wall of the processing channel 136, and multiple air vents form a serpentine flow path that bends up and down; or, multiple partitions 1311 are divided into two groups distributed left and right, the left side of one group of partitions 1311 is connected to the left wall of the processing channel 136, and the right side of the other group of partitions 1311 is connected to the right wall of the processing channel 136, and multiple air vents form a serpentine flow path that bends left and right; or, multiple partitions 1311 are divided into three groups distributed up, middle and down; or, multiple partitions 1311 are divided into three groups distributed left, middle and right.

[0113] The shape of the partition 1311 has at least the following structure:

[0114] First, the partition 1311 is a flat plate.

[0115] In this embodiment, as shown in FIG4 , when the partition 1311 is a flat plate, the spacing setting of the partition 1311 can change the flow direction of the flue gas, and the solid particles following the flue gas are separated from the airflow due to the collision with the partition 1311, thereby achieving effective interception of the solid particles.

[0116] Secondly, as shown in FIG5 , the partition 1311 is arc-shaped, and the center of curvature of the partition 1311 is located on a side of the partition 1311 close to the exhaust passage.

[0117] In this embodiment, when the partition 1311 is arc-shaped, the interval setting of the partition 1311 can enable solid particles to collide with the partition 1311 and separate from the airflow, while causing gas turbulence and achieving sedimentation of the solid particles.

[0118] The arc-shaped partitions 1311 are staggered up and down to allow solid particles to settle along the extension direction of the partitions 1311 .

[0119] According to some embodiments of the present application, referring to FIG6 , which is a schematic diagram of the structure of the first filter module 131 provided in some embodiments of the present application, each partition 1311 is provided with a filter hole 13111, and the flow area of ​​the filter hole 13111 is negatively correlated with the minimum distance between the partition 1311 where the filter hole 13111 is located and the exhaust channel.

[0120] The peripheral sides of the partition 1311 are connected to the inner wall of the processing channel 136 so that the flue gas can only flow through the filter holes 13111 on the partition 1311.

[0121] In this embodiment, when thermal runaway flue gas passes through baffle 1311, the design of the filter holes 13111 in baffle 1311 only allows flue gas with a diameter smaller than the filter holes 13111 to pass through, thereby reducing the content of solid particulate matter in the flue gas. Furthermore, the diameters of the filter holes 13111 on each baffle 1311 are arranged in a descending order along the direction of flue gas flow. This descending order allows solid particulate matter in the flue gas to be filtered step by step according to the diameter of the filter holes 13111, thereby improving filtration efficiency, enhancing the protection of the baffles 1311, and extending their service life.

[0122] In some embodiments, referring to FIG. 6 , the following condition is satisfied: 0.05 mm ≤ C1 ≤ 5 mm; wherein C1 is the diameter of the filter hole 13111 of the partition 1311 farthest from the exhaust channel among the plurality of partitions 1311 .

[0123] Among them, C1 can be 0.05mm, 1mm, 2mm, 4mm or 5mm to reduce the particulate matter content in the thermal runaway flue gas.

[0124] In this embodiment, the filter holes 13111 of the partitions 1311 that are farther away from the exhaust channel among the multiple partitions 1311 have larger diameters, so as to filter the solid particles step by step.

[0125] In some embodiments, there are multiple partitions 1311 , such as 3, 5 or more, which can be specifically set according to the number of processing channels 136 .

[0126] According to some embodiments of the present application, referring to Figures 6 and 7, which are schematic diagrams of the structure of the first filter module 131 provided in some embodiments of the present application, a storage tank 1312 is provided on the inner wall of the processing channel 136. The storage tank 1312 is located on the side of the partition 1311 facing the exhaust channel.

[0127] Among them, the storage tank 1312 is located on the side of the partition 1311 close to the exhaust channel. During the flow of smoke, the solid particles in the smoke collide with the partition 1311, and the solid particles in the smoke fall due to gravity. The storage tank 1312 can collect the fallen solid particles, and at the same time reduce the number of solid particles after sedimentation that are driven by airflow disturbance, thereby improving the interception efficiency.

[0128] According to some embodiments of the present application, the storage tank 1312 is suitable for being applied to the bottom side of the partition 1311 and is connected to the bottom wall of the processing channel 136 to collect solid particles that collide with the partition 1311 and fall off, thereby reducing the amount of solid particles in the storage tank 1312 that are carried away again by the airflow.

[0129] According to some embodiments of the present application, referring to FIG8 and further referring to FIG9, FIG8 and FIG9 are schematic diagrams of the structure of the second filter module 132 provided in some embodiments of the present application. The processing module includes the second filter module 132, and the second filter module 132 includes a dust removal bag 1321.

[0130] Among them, there are air holes 1322 distributed on the dust removal bag 1321. The diameter of the air holes 1322 on the dust removal bag 1321 of the second filter module 132 is smaller than the diameter of the filter holes 13111 of the partition 1311 of the first filter module 131, thereby performing more detailed screening of solid particles in the flue gas.

[0131] When the second filter module 132 is used in combination with the first filter module 131 , the second filter module 132 is disposed behind the first filter module 131 along the flow path of the smoke.

[0132] The dust bag 1321 of the second filter module 132 is in a compressed assembled form when the battery 10 is in normal working condition, see Figure 8. When the battery 10 has thermal runaway, the dust bag 1321 opens under the pressure of the thermal runaway flue gas, see Figure 9. The opened dust bag 1321 provides a fine powder screening function in the thermal runaway flue gas.

[0133] By setting up a dust bag 1321 structure that opens under the pressure of thermal runaway flue gas, the second filter module 132 can have a larger air permeability area, so that the flue gas has sufficient air permeable sites to penetrate the dust bag 1321, reducing the occurrence of solid particulate matter blockage and reducing the occurrence of airtight failure or explosion caused by excessive internal pressure in the box 11.

[0134] In some embodiments, the dust bag 1321 is provided with a plurality of air holes 1322 , satisfying: C2 ≤ 500 μm, where C2 is the diameter of the air hole 1322 .

[0135] Among them, C2 can be 50um, 100um, 250um or 500um to screen the fine powder in the thermal runaway flue gas.

[0136] In some embodiments, C2≤50 μm, for example, C2 may be 10 μm, 20 μm, 35 μm, or 50 μm, so as to screen out fine powder with smaller particle size in the thermal runaway flue gas.

[0137] According to some embodiments of the present application, the processing module includes a cooling module, and the cooling module includes at least the following two structures:

[0138] 10 and 11 , the cooling module includes a heat exchanger 1331 capable of exchanging heat with the flue gas in the processing channel 136 . The heat exchanger 1331 is used to circulate a heat exchange medium. For ease of description, the cooling module of this structure is referred to as the first cooling module 133 .

[0139] Among them, the processing channel 136 is used to circulate the flue gas, and the heat exchanger 1331 is used to circulate the heat exchange medium, and the heat exchange medium is used to exchange heat with the flue gas, thereby cooling the high-temperature flue gas generated by thermal runaway.

[0140] According to some embodiments of the present application, referring to FIG. 10 , one of the heat exchanger 1331 and the process channel 136 includes a spiral tube, which is located inside the other of the heat exchanger 1331 and the process channel 136 .

[0141] For example, the heat exchange medium may be water or a glycol mixture.

[0142] Among them, the heat exchanger 1331 can be a tubular heat exchanger, a plate heat exchanger or a spray heat exchanger, and the specific selection is made according to the usage scenario.

[0143] The heat exchange medium can be set to be stationary, the flow direction of the heat exchange medium is opposite to the flow direction of the thermal runaway flue gas, or the angle between the flow direction of the heat exchange medium and the flow direction of the thermal runaway flue gas is greater than 90° to improve the heat exchange efficiency.

[0144] The cooling module includes at least the following two structural schemes:

[0145] First, the spiral tube is a heat exchanger 1331, and the spiral tube is located in the processing channel 136.

[0146] Among them, the spiral tube is used to allow the heat exchange medium to flow, so as to realize heat exchange between the spiral tube and the processing channel 136, increase the flow path of the heat exchange medium, thereby increasing the contact time between the thermal runaway flue gas and the heat exchange medium, so as to realize rapid cooling of the thermal runaway flue gas.

[0147] In this embodiment, by configuring the heat exchanger 1331 as a spiral tube structure, the direct contact area between the thermal runaway flue gas and the cooling module can be increased, thereby enhancing the heat exchange efficiency of the thermal runaway flue gas.

[0148] Second, the inside of the spiral tube is a processing channel 136, the spiral tube is used for flue gas flow, the spiral tube is located in the heat exchanger 1331, and a medium channel is provided outside the spiral tube.

[0149] For some systems with a slow emission rate of thermal runaway flue gas, the processing channel 136 can be set inside the spiral tube, that is, the spiral tube is used for the circulation of thermal runaway high-temperature flue gas, and the heat exchange medium is set outside the spiral tube.

[0150] According to some embodiments of the present application, referring to Figure 11, the heat exchanger 1331 includes multiple sections of air guide pipes 13311 and collecting pipes 13312 connecting the air guide pipes 13311. The cross-sectional area of ​​the collecting pipes 13312 is larger than the cross-sectional area of ​​the air guide pipes 13311. The heat exchanger 1331 is located in the processing channel 136.

[0151] In this embodiment, the flue gas flow rate in the collection pipe 13312 area decreases and can fully contact with the heat exchange medium to cool down. After partial steam condenses, it can be stored at the bottom of the collection pipe 13312 area and will not be carried out by the flue gas, thereby achieving preliminary cooling treatment of the thermal runaway flue gas.

[0152] Among them, the collecting tube 13312 and the air guide tube 13311 can be connected by integral molding, threaded connection or welding, and the collecting tube 13312 can be a rectangular tube, a cylindrical tube or a spherical tube, and the cross-sectional area of ​​the collecting tube 13312 is larger than the cross-sectional area of ​​the air guide tube 13311.

[0153] The heat exchanger 1331 is provided to cool or condense the thermal runaway flue gas, and is a first cooling module 133 of the heat transfer type.

[0154] Secondly, referring to Figures 12, 13 and 14, the cooling module includes a water storage chamber 1341 provided on the top wall of the processing channel 136, and the bottom wall of the water storage chamber 1341 is provided with an opening mechanism, which is configured to open when the pressure of the processing channel 136 reaches the target pressure and / or the temperature reaches the target temperature. When the opening mechanism is opened, the water in the water storage chamber 1341 flows out into the processing channel 136.

[0155] For ease of description, the cooling module of this structure is referred to as the second cooling module 134. The temperature of the second cooling module 134 is lower than that of the first cooling module 133. The second cooling module 134 can be used to pre-process and recover components in the thermal runaway flue gas that may liquefy at room temperature through condensation.

[0156] In this embodiment, when the pressure and temperature of the battery 10 are normal, the opening mechanism is closed, and the water storage chamber 1341 is not connected to the processing channel 136; when the pressure of the processing channel 136 reaches the target pressure and / or the temperature reaches the target temperature, the opening mechanism is opened, the water storage chamber 1341 is connected to the processing channel 136, and the water curtain flows from the water storage chamber 1341 to the processing channel 136, thereby cooling the high-temperature flue gas in the processing channel 136 and settling the solid particles in the flue gas.

[0157] It should be noted that water or other cooling medium can be stored in the water storage chamber 1341. When the temperature of the processing channel 136 reaches the target temperature, the cooling medium in the water storage chamber 1341 expands due to the heat to drive the opening mechanism to open.

[0158] The opening mechanism may at least have the following structure:

[0159] First, referring to Figures 13 and 15, the bottom wall of the water storage chamber 1341 is provided with a gap 1343, and the opening mechanism includes a seal for sealing the gap 1343, and the seal is configured to fail when the pressure of the processing channel 136 reaches the target pressure and / or the temperature reaches the target temperature.

[0160] Among them, the sealing member can be a sealing film 13441 or a filler 13442, see Figure 16, the filler 13442 can be made of rubber material such as silicone rubber or fluororubber, or it can be a structural part injection-molded by polymer plastic; see Figure 17, the sealing film 13441 can be a polymer plastic film such as polypropylene or polyimide, and the filler 13442 and the sealing film 13441 can be broken under a certain pressure or temperature.

[0161] In some embodiments, the slits 1343 may include multiple slits, and the extension direction of the multiple slits 1343 is perpendicular to the flow direction of the smoke. The multiple slits 1343 are arranged at intervals along the flow direction of the smoke to increase the cooling efficiency.

[0162] Second, referring to Figures 15 and 18, the bottom wall of the water storage chamber 1341 is provided with a weakening groove 1344, and the opening mechanism includes the bottom wall of the weakening groove 1344, and the bottom wall of the weakening groove 1344 is configured to break when the pressure of the processing channel 136 reaches the target pressure and / or the temperature reaches the target temperature.

[0163] Among them, the bottom wall thickness of the weakening groove 1344 is less than that of other parts of the bottom wall of the water storage chamber 1341, and the structural strength of the bottom wall of the weakening groove 1344 is less than that of other parts of the bottom wall of the water storage chamber 1341. The bottom wall of the weakening groove 1344 is easier to break, so that when the pressure of the processing channel 136 reaches the target pressure and / or the temperature reaches the target temperature, the weakening groove 1344 can be broken and the water curtain can flow out, so as to achieve rapid cooling or condensation of the thermal runaway flue gas.

[0164] In some embodiments, the following condition is satisfied: L1≤5 mm; wherein L1 is the width of the gap 1343 or the weakened groove 1344 .

[0165] Among them, L1 can be 1 mm, 3 mm or 5 mm, so that the water curtain flows out along the gap 1343 or the weakening groove 1344 and forms water mist, thereby improving the contact effect with the thermal runaway flue gas.

[0166] In some embodiments, the following condition is satisfied: L1≤2mm; for example, L1 may be 1mm, 1.5mm or 2mm, so that the water curtain can better form water mist when flowing out along the gap 1343 or the weakening groove 1344, further improving the contact effect between the water mist and the thermal runaway flue gas.

[0167] A water curtain is provided to cool or condense the thermal runaway flue gas, which is a second cooling module 134 of the water curtain type.

[0168] In some embodiments, the water inlet 13411 and the water outlet 13412 of the water storage chamber 1341 are both connected to the liquid cooling system of the battery 10, so that the water storage chamber 1341 can be replenished with liquid, so that the water curtain can continue to flow out, thereby improving the effect of cooling and condensing the flue gas.

[0169] In some embodiments, the processing module includes an adsorption module 135, which is used to adsorb liquid and / or combustible gas in the flue gas, thereby reducing the content of liquid and / or combustible gas in the thermal runaway flue gas and reducing secondary disasters.

[0170] In some embodiments, the adsorption module 135 includes an encapsulation layer and an adsorption substance within the encapsulation layer.

[0171] Among them, the encapsulation layer is used to encapsulate the adsorbent to improve the structural stability of the adsorbent, extend the service life, and reduce the leakage of the adsorbent or structural collapse due to thermal runaway gas flushing.

[0172] The encapsulation layer may use a porous encapsulation sheet, thereby achieving an encapsulation effect, while the pores on the porous encapsulation sheet allow the smoke to circulate normally.

[0173] The pore size of the porous encapsulation sheet can be set according to the particle size of the absorbent used. The pore size of the porous encapsulation sheet needs to be smaller than the particle size of the absorbent used to reduce leakage of the absorbent or thermal runaway flue gas ejection.

[0174] The encapsulation layer may be a metal sheet or a plastic sheet having certain structural strength and temperature resistance.

[0175] The absorbent material may be at least one of the following three materials:

[0176] First, the adsorbent includes microporous adsorbent.

[0177] In this embodiment, the adsorption module 135 physically absorbs the flue gas. The microporous adsorption material may be a material with a microporous structure, such as activated carbon, silica gel, or alumina balls, and the adsorption object is particulate matter in the thermal runaway flue gas.

[0178] Second, adsorbents include chemical adsorbents.

[0179] In this embodiment, the adsorption module 135 performs chemical absorption on the flue gas. The chemical adsorption substance can chemically react with certain substances in the thermal runaway flue gas or promote the chemical reaction of the treatment object, such as anhydrous calcium chloride, anhydrous magnesium sulfate, calcium oxide or precious metal catalysts, so as to reduce the combustible gas component in the thermal runaway flue gas.

[0180] Third, adsorbents include microporous adsorbents and chemical adsorbents.

[0181] In this embodiment, the adsorption module 135 performs physical and chemical absorption on the flue gas, and the absorption object is the electrolyte vapor, water vapor or volatile organic compound gas in the thermal runaway flue gas, so as to further reduce the visible mist and combustible gas components in the thermal runaway flue gas.

[0182] In some embodiments, there are multiple processing modules, and the multiple processing modules are sequentially spaced apart and arranged along the processing channel 136 to perform multiple treatments on the thermal runaway flue gas to improve the treatment effect.

[0183] Among them, multiple processing modules can have the same function or be a combination of different functional modules. The specific combination can be selected according to the application scenario to adapt to different battery scenarios.

[0184] The multiple processing modules may have different functions, including at least the following combinations:

[0185] First, the processing module includes a first filter module 131, a cooling module and an adsorption module 135 arranged in sequence along the direction from the exhaust passage to the outside.

[0186] This solution is suitable for chemical systems with higher energy density, such as high-nickel ternary lithium batteries. This type of battery has more severe thermal runaway, higher gas production rate and higher temperature. During thermal runaway, the electrodes inside the battery will break and be ejected with the airflow, resulting in a large amount of black thermal runaway powder in the thermal runaway flue gas.

[0187] The first filtering module 131 mainly performs preliminary isolation treatment on particles with a particle size greater than 0.1 mm in the thermal runaway flue gas, thereby reducing the particles in the thermal runaway flue gas and reducing the blockage of the subsequent processing mechanism 13 by large particles, thereby stabilizing the back pressure in the battery.

[0188] The cooling module can be the first cooling module 133 and / or the second cooling module 134, which can cool the flue gas and perform preliminary adsorption and sedimentation of fine particles in the flue gas. The purpose of cooling is to improve the processing efficiency of subsequent processing modules and reduce the risk of secondary disasters caused by high temperature of flue gas exhaust.

[0189] After being processed by the first filtering module 131 and the cooling module, the solid particulate matter content in the flue gas is reduced to a low level, and is mainly composed of fine powders with very small particle sizes. The remaining visible parts are electrolyte vapor or water vapor. Therefore, the adsorption module 135 mainly absorbs and catalyzes the electrolyte vapor, water vapor and combustible component gas in the remaining flue gas.

[0190] Secondly, the processing module includes a first filter module 131 , a cooling module and an adsorption module 135 , and a second filter module 132 arranged in sequence along the direction of the exhaust channel to the outside. The filtering granularity of the second filter module 132 is smaller than that of the first filter module 131 .

[0191] This solution is suitable for products that pursue extreme processing, or for products with high energy density and fast exhaust rate. The first solution cannot completely remove the particulate matter in the thermal runaway flue gas. At this time, a second filter module 132 can be added to the processing mechanism 13 to further reduce the particulate matter content in the thermal runaway flue gas through the microporous screening of the dust removal bag 1321, so as to further achieve the effect of no black smoke or no smoke in the flue gas.

[0192] Third, the processing module includes a first cooling module 133 , a second cooling module 134 and an adsorption module 135 arranged in sequence along the direction from the exhaust channel to the outside, and the temperature of the second cooling module 134 is lower than that of the first cooling module 133 .

[0193] This solution is suitable for some chemical systems with low energy density, such as lithium iron phosphate batteries. The battery thermal runaway process is relatively mild, the gas production rate is slow, and the runaway flue gas basically does not contain solid electrodes.

[0194] The first cooling module 133 mainly performs preliminary cooling of the thermal runaway flue gas, paves the way for the second cooling module 134, and improves the processing efficiency of the second cooling module 134. Through the second cooling module 134, the components in the thermal runaway flue gas that may be liquefied at room temperature can be processed and recovered in advance by condensation.

[0195] The adsorption module 135 absorbs and catalytically processes the electrolyte vapor, water vapor and combustible gas components that are not completely condensed in the thermal runaway flue gas, thereby reducing the hazard level of the thermal runaway flue gas.

[0196] In some embodiments, the processing mechanism 13 is designed on the exhaust path of the thermal runaway flue gas of the battery 10 . For example, the processing mechanism 13 can be installed inside the box 11 ; or, the processing mechanism 13 can be installed outside the box 11 .

[0197] Among them, processing modules with different functions can be integrated in different positions of battery 10 components to improve the treatment effect of thermal runaway flue gas.

[0198] When installed in the box body 11, the processing mechanism 13 is arranged on the smoke exhaust path in the box body 11, such as before the electrical compartment enters the crossbeam, in the crossbeam, at the crossbeam outlet, in the lower box cavity or the whole package pressure relief mechanism; when installed outside the box body 11, the processing mechanism 13 is installed at the end of the smoke exhaust path, such as in the pipe connecting the battery 10 and the external processing mechanism or in the external processing mechanism.

[0199] An embodiment of the present application further provides an electrical device, comprising any one of the batteries 10 described above, wherein the battery 10 is used to provide electrical energy to the electrical device.

[0200] Any of the above-mentioned batteries 10 has a processing mechanism 13, which can filter, cool down, absorb, or perform one or more other treatments on the thermal runaway flue gas of the battery 10, thereby reducing the secondary hazards and panic caused by the thermal runaway flue gas. The electrical device with the battery 10 also has this effect and is safer.

[0201] 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.

[0202] 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; The processing mechanism forms a processing channel and includes at least one processing module arranged at the processing channel. The processing channel is connected to the exhaust channel and the outside world. The processing module is used to process the flue gas flowing through the processing channel.

2. The battery according to claim 1, characterized in that The processing module includes a first filter module, and the first filter module includes a plurality of partitions spaced apart from each other along an extension direction of the processing channel.

3. The battery according to claim 2, characterized in that A storage groove is provided on the inner wall of the processing channel, and the storage groove is located on a side of the partition facing the exhaust channel.

4. The battery according to claim 2 or 3, characterized in that Each of the partitions is provided with a filter hole, and the flow area of ​​the filter hole is negatively correlated with the minimum distance from the partition where the filter hole is located to the exhaust channel.

5. The battery according to claim 4, characterized in that Meet: 0.05mm≤C1≤5mm; Wherein, C1 is the diameter of the filter hole of the partition farthest from the exhaust channel among the multiple partitions.

6. The battery according to claim 2 or 3, characterized in that Any of the partitions has a side edge spaced apart from the inner wall of the processing channel to form a vent between the partition and the inner wall of the processing channel, and the union of the projections of the multiple partitions along the extension direction of the processing channel covers the processing channel.

7. The battery according to claim 6, characterized in that The union of the projections of any two adjacent partitions along the extension direction of the processing channel covers the processing channel; And / or, the projections of any two adjacent partitions along the extension direction of the processing channel intersect.

8. The battery according to claim 6, characterized in that The area of ​​any of the partitions is greater than half of the cross-sectional area of ​​the processing channel in the region where the partition is located.

9. The battery according to claim 6, characterized in that The multiple partitions are divided into multiple groups, and the multiple partitions in each group are arranged opposite each other along the extension direction of the processing channel. The partitions in different groups are spaced apart around the circumference of the processing channel, and the partitions in different groups are staggered along the extension direction of the processing channel.

10. The battery according to any one of claims 1 to 9, characterized in that The processing module includes a second filter module, and the second filter module includes a dust removal bag.

11. The battery according to claim 10, characterized in that The dust bag is provided with a plurality of ventilation holes; C2≤500μm; Wherein, C2 is the diameter of the vent hole.

12. The battery according to any one of claims 1 to 11, characterized in that The processing module includes a cooling module, and the cooling module includes a heat exchanger capable of performing heat exchange with the flue gas in the processing channel, and the heat exchanger is used for circulating a heat exchange medium.

13. The battery according to claim 12, characterized in that One of the heat exchanger and the process channel includes a coiled tubing positioned within the other of the heat exchanger and the process channel.

14. The battery according to claim 12, characterized in that The heat exchanger includes a plurality of air guide tubes and a collecting tube connecting the air guide tubes. The cross-sectional area of ​​the collecting tube is larger than the cross-sectional area of ​​the air guide tubes. The heat exchanger is located in the processing channel.

15. The battery according to any one of claims 1 to 11, characterized in that The processing module includes a cooling module, which includes a water storage chamber arranged on the top wall of the processing channel, and the bottom wall of the water storage chamber is provided with an opening mechanism, and the opening mechanism is configured to open when the pressure of the processing channel reaches a target pressure and / or the temperature reaches a target temperature. When the opening mechanism is opened, the water in the water storage chamber flows out into the processing channel.

16. The battery according to claim 15, characterized in that The bottom wall of the water storage chamber is provided with a gap, the opening mechanism includes a seal for sealing the gap, and the seal is configured to fail when the pressure of the processing channel reaches a target pressure and / or the temperature reaches a target temperature; or, The bottom wall of the water storage chamber is provided with a weakened groove, the opening mechanism includes the bottom wall of the weakened groove, and the bottom wall of the weakened groove is configured to rupture when the pressure of the processing channel reaches a target pressure and / or the temperature reaches a target temperature.

17. The battery according to claim 15 or 16, characterized in that satisfy: L1≤5mm; Wherein, L1 is the width of the gap or the weakened groove.

18. The battery according to any one of claims 15 to 17, characterized in that The water inlet and the water outlet of the water storage chamber are both connected to the liquid cooling system of the battery.

19. The battery according to any one of claims 1 to 18, characterized in that The processing module includes an adsorption module, and the adsorption module is used to adsorb liquid and / or combustible gas in the flue gas.

20. The battery according to claim 19, characterized in that The adsorption module includes an encapsulation layer and an adsorption substance located in the encapsulation layer.

21. The battery according to claim 20, characterized in that The adsorption material includes a microporous adsorption material; and / or, the adsorption material includes a chemical adsorption material.

22. The battery according to any one of claims 1 to 21, characterized in that There are multiple processing modules, and the multiple processing modules are sequentially spaced apart and arranged along the processing channel.

23. The battery according to claim 22, characterized in that The processing module includes a filtering module, a cooling module and an adsorption module which are sequentially arranged along the direction from the exhaust passage to the outside.

24. The battery according to claim 22, characterized in that The processing module includes a first filter module, a cooling module, an adsorption module and a second filter module arranged in sequence along the direction from the exhaust passage to the outside, and the filter granularity of the second filter module is smaller than that of the first filter module.

25. The battery according to claim 22, characterized in that The processing module includes a first cooling module, a second cooling module and an adsorption module arranged in sequence along the direction from the exhaust passage to the outside, and the temperature of the second cooling module is lower than that of the first cooling module.

26. The battery according to any one of claims 1 to 25, characterized in that The processing mechanism is installed in the box; or, The processing mechanism is installed outside the box.

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

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