Battery device and electric device

Abstract

Provided in the embodiments of the present application are a battery device and an electric device. The battery device comprises a case, a battery cell assembly and an exhaust tube. The case has a first accommodating cavity; the battery cell assembly is arranged in the first accommodating cavity, and comprises a plurality of battery cells, with each battery cell being provided with a first pressure relief mechanism; the exhaust tube is connected to the case, and is used for collecting emissions of the battery cells when the first pressure relief mechanisms are actuated, and discharging the emissions out of the case; and the exhaust tube has at least one corner. On the basis of the technical solution provided in the present application, environmental pollution caused by the battery device in the case of thermal runaway can be reduced.

Description

Battery devices and electrical appliances

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application CN202510005255.5, filed on January 2, 2025, entitled “Battery Device and Power Consumption Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery device technology, and more specifically, to a battery device and an electrical device. Background Technology

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0005] During the manufacturing process of battery devices, the environmental friendliness under thermal runaway conditions is a crucial issue. Therefore, reducing environmental pollution during thermal runaway is a pressing technical problem that needs to be solved in battery technology. Summary of the Invention

[0006] This application provides a battery device and an electrical device that can reduce environmental pollution in the event of thermal runaway of the battery device.

[0007] This application is achieved through the following technical solution:

[0008] In a first aspect, embodiments of this application provide a battery device, which includes a housing, a battery cell assembly, and an exhaust pipe. The housing has a first receiving cavity; the battery cell assembly is disposed within the first receiving cavity, the battery cell assembly includes multiple battery cells, and each battery cell is provided with a first pressure relief mechanism; the exhaust pipe is connected to the housing, and the exhaust pipe is used to collect the emissions from the battery cells when the first pressure relief mechanism is actuated, and to discharge the emissions from the housing, the exhaust pipe having at least one corner.

[0009] According to the battery device of this application embodiment, the exhaust pipe is connected to the housing. The exhaust pipe collects emissions from the battery cells when the first pressure relief mechanism is actuated. The emissions are discharged outside the housing through the exhaust pipe, which can reduce the concentration and temperature of the flue gas. Specifically, after the emissions from the battery cells enter the exhaust pipe, they pass through at least one corner, which increases the flow path of the flue gas within the exhaust pipe. On the one hand, this buffers the flow rate of the flue gas; on the other hand, it increases the contact time between the flue gas and the pipe wall, allowing for heat exchange between the high-temperature flue gas and the exhaust pipe, facilitating the reduction of the flue gas temperature and improving the condensation effect. Simultaneously, solid particles in the emissions can deposit inside the exhaust pipe, thereby reducing the concentration of flue gas in the emissions discharged from the exhaust pipe and reducing environmental pollution caused by emissions emitted in the event of thermal runaway of the battery device.

[0010] According to some embodiments of this application, the length of the exhaust pipe is L, which satisfies L≥0.5m.

[0011] In the above scheme, the length of the exhaust pipe satisfies the above relationship, and the flow path of the emissions in the exhaust pipe is relatively long, which facilitates the temperature reduction of the flue gas and the deposition of solid particles, thereby reducing the pollution of the environment caused by the emissions emitted in the event of thermal runaway of the battery device.

[0012] According to some embodiments of this application, 2m≤L≤20m.

[0013] In the above scheme, when the length of the exhaust pipe is greater than or equal to 2m, the emissions have a longer flow path in the exhaust pipe, which is conducive to the reduction of flue gas temperature and the deposition of solid particles; when the length of the exhaust pipe is less than or equal to 20m, the exhaust pipe can occupy less space and has a lower cost while meeting the requirements of reducing flue gas temperature and concentration.

[0014] According to some embodiments of this application, the number of corners is M, where M≥4.

[0015] In the above scheme, the number of corners is greater than or equal to 4. The emissions collide with the pipe wall of the exhaust pipe multiple times, the temperature of the flue gas decreases, and solid particles can be deposited in the exhaust pipe, so that the emissions discharged through the exhaust pipe have less pollution to the environment. For example, when the exhaust pipe is provided with four corners, the four corners can be set at the corners of a cuboid-shaped box. The exhaust pipe can be arranged around the cuboid-shaped box. The exhaust pipe has a long length, and the flow path of the emissions in the exhaust pipe is long. The emissions pass through four corners, which is conducive to the reduction of flue gas temperature and the deposition of solid particles.

[0016] According to some embodiments of this application, the air inlet end of the exhaust pipe is connected to the first receiving cavity, and the exhaust end of the exhaust pipe is connected to the outside of the housing.

[0017] In the above scheme, the air inlet end of the exhaust pipe is connected to the first receiving cavity, which facilitates the collection of emissions from the battery cells; the exhaust end of the exhaust pipe is connected to the outside of the box, and the emissions from the battery cells are discharged from the box after passing through the exhaust pipe, which is conducive to the cooling of the emissions and the deposition of solid particles.

[0018] According to some embodiments of this application, an exhaust channel is formed inside the exhaust pipe, and the minimum cross-sectional area of ​​the exhaust channel is W, which satisfies 50mm. 2 ≤W≤1000mm 2 .

[0019] In the above scheme, the minimum cross-sectional area of ​​the exhaust channel is greater than or equal to 50 mm. 2 This design facilitates the entry of battery cell emissions into the exhaust channel, and the high flow velocity of the emissions within the exhaust channel promotes pressure relief in the battery assembly; the minimum cross-sectional area of ​​the exhaust channel is less than or equal to 1000 mm². 2 When the exhaust pipe is designed to facilitate the collection of emissions from battery cells and the emissions have a high flow rate when exiting the exhaust channel, the exhaust pipe occupies a small space.

[0020] According to some embodiments of this application, 200mm 2 ≤W≤500mm 2 .

[0021] In the above scheme, when W≥200mm 2 When W ≤ 500mm, the exhaust pipe has a large flow area, which facilitates the rapid flow of exhaust materials within the exhaust pipe; 2 At the same time, under the condition that the exhaust pipe is conducive to collecting the emissions of the battery cells and the emissions have a high flow rate when they are discharged from the exhaust channel, the space occupied by the exhaust pipe can be further reduced.

[0022] According to some embodiments of this application, the exhaust pipe has at least one enlarged section.

[0023] In the above scheme, the expansion section can be regarded as the part where the cross-sectional area of ​​the exhaust channel in the exhaust pipe increases. After the emission material enters the expansion section from the small diameter area, the flow rate of the emission material slows down, the temperature of the flue gas decreases, and the liquid after the flue gas condenses and the solid particles in the flue gas can settle in the expansion section to achieve the effect of reducing the flue gas temperature and the flue gas concentration.

[0024] According to some embodiments of this application, the exhaust pipe includes a plurality of pipe segments arranged sequentially along its extension direction, and the melting point of the plurality of pipe segments decreases sequentially from the air inlet end of the exhaust pipe to the air outlet end of the exhaust pipe.

[0025] In the above scheme, the pipe section closest to the intake end of the exhaust pipe has the highest melting point, which is to facilitate the collection of high-temperature emissions. Since the melting points of the multiple pipe sections are different, pipe sections made of different materials can be used. On the one hand, this helps to reduce costs, and on the other hand, it facilitates the assembly of multiple pipe sections.

[0026] According to some embodiments of this application, the melting point of the exhaust pipe is greater than or equal to 80°C.

[0027] In the above scheme, the melting point of the exhaust pipe is greater than or equal to 80℃, and the exhaust pipe has high high temperature resistance, which facilitates the collection of high temperature emissions.

[0028] According to some embodiments of this application, the thickness of the wall portion of the housing is less than or equal to 10 mm.

[0029] In the above scheme, the thickness of the casing wall satisfies the above relationship, and the casing wall can be designed to be thinner, which is conducive to improving the energy density of the battery device.

[0030] According to some embodiments of this application, the housing includes side walls and a bottom wall, the side walls surrounding the bottom wall, the bottom wall supporting the battery cell assembly, and the exhaust pipe arranged circumferentially along the side walls.

[0031] In the above scheme, the side wall is surrounded by the bottom wall, and the exhaust pipe is arranged along the circumference of the side wall to facilitate the assembly of the exhaust pipe and the box.

[0032] According to some embodiments of this application, the exhaust pipe is arranged in a spiral shape along the circumference of the sidewall.

[0033] In the above scheme, the exhaust pipe is arranged in a spiral shape along the circumference of the side wall, the exhaust pipe has a relatively long length, and the exhaust pipe can be set with multiple corners, which is convenient to reduce the temperature of the emissions and reduce the concentration of flue gas.

[0034] According to some embodiments of this application, the sidewall includes a plurality of sub-sidewalls connected end to end, and the portions of the exhaust pipe located on two adjacent sub-sidewalls are connected by a corner.

[0035] In the above scheme, multiple sub-sidewalls are connected end to end, and the portions of the exhaust pipe located on two adjacent sub-sidewalls are connected by corners. The exhaust pipe has many corners, which increases the obstruction of the exhaust pipe wall to the flowing emissions, which helps to reduce the temperature of the emissions and the deposition of solid particles.

[0036] According to some embodiments of this application, the exhaust pipe includes multiple pipe segments. Along the extension direction of the exhaust pipe, two adjacent pipe segments are respectively connected to two adjacent sub-side walls, and an angle is formed between two adjacent pipe segments.

[0037] In the above scheme, the pipe segments can be set corresponding to the sub-side walls, which is convenient for processing and manufacturing; two adjacent pipe segments are respectively connected to two adjacent sub-side walls, and a corner is formed between the two adjacent pipe segments, which is convenient for the assembly of the exhaust pipe and the housing.

[0038] According to some embodiments of this application, the exhaust pipe includes a plurality of first pipe segments and at least one second pipe segment. Along the extension direction of the exhaust pipe, the first pipe segments and the second pipe segments are alternately arranged. The plurality of first pipe segments are parallel to each other and spaced apart. An angle is formed between the first pipe segment and the second pipe segment.

[0039] In the above scheme, multiple first pipe sections are arranged parallel to each other and spaced apart, and a corner is formed between the first pipe section and the second pipe section. The emissions have a longer flow path in the exhaust pipe, which improves the flue gas condensation effect and facilitates the deposition of solid particles.

[0040] According to some embodiments of this application, the length of the first pipe segment is greater than the length of the second pipe segment.

[0041] In the above scheme, since multiple first pipe sections are parallel to each other and the length of the second pipe section is relatively short, the gap between multiple parallel first pipe sections is small. More first pipe sections and corners can be set to improve the space utilization of the exhaust pipe, so that the length of the exhaust pipe can be designed to be longer, so as to increase the flow path of the exhaust in the exhaust pipe.

[0042] According to some embodiments of this application, the housing includes a side wall and a bottom wall, the bottom wall supports the battery cell assembly, the side wall surrounds the bottom wall, and a first pipe segment and a second pipe segment are disposed on the side wall.

[0043] In the above scheme, the first and second pipe sections are located on the side wall to facilitate the assembly of the exhaust pipe and the housing.

[0044] According to some embodiments of this application, the extension direction of the first pipe segment intersects with the thickness direction of the bottom wall.

[0045] In the above scheme, the extension direction of the first pipe segment can be the length direction of the first pipe segment. The length direction of the first pipe segment intersects with the thickness direction of the bottom wall. Multiple first pipe segments can be set in the thickness direction of the bottom wall to make good use of the space in the thickness direction of the bottom wall.

[0046] According to some embodiments of this application, the extension direction of the first pipe segment is parallel to the thickness direction of the bottom wall.

[0047] In the above scheme, the extension direction of the first pipe segment can be the length direction of the first pipe segment. The length direction of the first pipe segment is parallel to the thickness direction of the bottom wall. Multiple first pipe segments can be set in the circumferential direction of the side wall to make good use of the space in the circumferential direction of the side wall.

[0048] According to some embodiments of this application, the exhaust pipe is disposed inside the housing.

[0049] In the above scheme, the exhaust pipe is installed inside the box, which facilitates the protection of the exhaust pipe and reduces the space occupied by the exhaust pipe on the outside of the box.

[0050] According to some embodiments of this application, the exhaust pipe is disposed outside the housing.

[0051] In the above scheme, the exhaust pipe is located outside the box, which reduces the space occupied by the exhaust pipe inside the box, facilitates the improvement of space utilization inside the box, and allows for the installation of more battery cell modules inside the box.

[0052] According to some embodiments of this application, the battery device further includes a protective member located outside the housing and connected to the housing, the protective member and the housing forming a second receiving cavity, and at least a portion of the exhaust pipe is disposed within the second receiving cavity.

[0053] In the above scheme, the protective component and the housing form a second receiving cavity, and at least a portion of the exhaust pipe is disposed in the second receiving cavity in order to protect the exhaust pipe and reduce the risk of damage to the exhaust pipe.

[0054] Secondly, embodiments of this application also provide an electrical device, which includes a battery device according to any of the above embodiments, the battery device being used to provide electrical energy.

[0055] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0058] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0059] Figure 3 is a schematic diagram of the assembly of the exhaust pipe and the housing provided in some embodiments of this application;

[0060] Figure 4 is a schematic diagram of the exhaust pipe in Figure 3;

[0061] Figure 5 is a cross-sectional view of an exhaust pipe provided in some embodiments of this application;

[0062] Figure 6 is a schematic diagram of the assembly of the exhaust pipe and the housing provided in some other embodiments of this application;

[0063] Figure 7 is a schematic diagram of the exhaust pipe in Figure 6;

[0064] Figure 8 is a schematic diagram of the assembly of the exhaust pipe and the housing according to some embodiments of this application;

[0065] Figure 9 is a schematic diagram of the exhaust pipe in Figure 8;

[0066] Figure 10 is a schematic diagram of an exhaust pipe disposed outside the housing according to some embodiments of this application;

[0067] Figure 11 is a schematic diagram of the assembly of the protective component and the housing provided in some embodiments of this application;

[0068] Figure 12 is a schematic diagram of the assembly of the exhaust pipe and the second pressure relief mechanism provided in some embodiments of this application.

[0069] Icons: 100 - Battery assembly; 10 - Housing; 10a - First receiving cavity; 10b - First sub-housing; 10c - Second sub-housing; 11 - Side wall; 111 - Sub-side wall; 111a - First sub-side wall; 111b - Second sub-side wall; 111c - Third sub-side wall; 111d - Fourth sub-side wall; 12 - Bottom wall; 13 - Cover; 20 - Battery cell assembly; 21 - Battery cell; 211 - First pressure relief mechanism; 3 0-Exhaust pipe; 31-Corner; 32-Exhaust passage; 33-Expanded diameter section; 34-Pipe section; 341-First pipe section; 341a-First end pipe section; 341b-Second end pipe section; 342-Second pipe section; 40-Protective component; 40a-Second receiving cavity; 50-Second pressure relief mechanism; 200-Controller; 300-Motor; 1000-Vehicle; X-First direction; Y-Second direction; Z-Thickness direction of bottom wall. Embodiments of the present invention

[0070] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0072] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0073] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0074] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0075] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0076] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0077] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0078] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0079] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0080] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0081] As an example, the enclosure may include a first sub-enclosure and a second sub-enclosure. The first and second sub-enclosures are interlocked to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first sub-enclosure may be a top cover or a bottom plate.

[0082] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0083] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0084] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0085] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0086] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0087] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0088] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0089] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0090] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0091] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0092] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, or made of carbon, nickel, or titanium, etc.

[0093] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0094] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0095] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0096] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0097] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0098] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0099] In some implementations, the electrode assembly is a stacked structure.

[0100] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0101] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The casing may have one or more openings. The end cap may also be provided one or more times.

[0102] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal can be located on the end cap or on the housing.

[0103] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0104] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, it protects the electrode assembly and prevents leaks such as electrolyte leakage. When the housing is a non-sealed structure, it protects the electrode assembly, and a sealing bag may be included between the housing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film.

[0105] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments of this application.

[0106] The development of battery technology must take into account multiple design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge rate. In addition, it is also necessary to consider the environmental pollution caused by thermal runaway of the battery device.

[0107] In some embodiments, the battery device includes a housing and a battery cell assembly disposed within the housing, the battery cell assembly comprising multiple battery cells. When a battery cell experiences thermal runaway, high-temperature, high-pressure emissions are discharged from inside the battery cell into the housing. These emissions are then released to the outside via a pressure relief mechanism on the housing to reduce the internal pressure of the battery device and decrease the risk of explosion. However, in the event of thermal runaway, the high-temperature fumes released to the outside of the housing can easily cause environmental pollution.

[0108] In view of this, in order to address the environmental impact of emissions from battery devices under thermal runaway conditions, embodiments of this application provide a battery device, which includes a housing, a battery cell assembly, and an exhaust pipe. The housing has a first receiving cavity; the battery cell assembly is disposed within the first receiving cavity, and the battery cell assembly includes multiple battery cells, each battery cell being provided with a first pressure relief mechanism; the exhaust pipe is connected to the housing, and the exhaust pipe is used to collect emissions from the battery cells when the first pressure relief mechanism is actuated, and to discharge the emissions from the housing, the exhaust pipe having at least one corner.

[0109] In this battery device, an exhaust pipe is connected to the housing. The exhaust pipe collects emissions from the individual battery cells when the first pressure relief mechanism is activated. These emissions are then discharged outside the housing, reducing both the concentration and temperature of the flue gas. Specifically, after entering the exhaust pipe, the emissions pass through at least one bend, increasing the flow path of the flue gas within the pipe. This buffers the flow rate and increases the contact time between the flue gas and the pipe wall, allowing for heat exchange and facilitating temperature reduction and condensation. Simultaneously, solid particles in the emissions can deposit within the exhaust pipe, further reducing the concentration of flue gas discharged and minimizing environmental pollution in the event of thermal runaway from the battery device.

[0110] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery device disclosed in this application.

[0111] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0112] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0113] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0114] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0115] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0116] Please refer to Figures 2 to 4. Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application. Figure 3 is an assembly diagram of the exhaust pipe and the housing provided in some embodiments of this application. Figure 4 is a structural diagram of the exhaust pipe in Figure 3. This application provides a battery device 100, which includes a housing 10, a battery cell assembly 20, and an exhaust pipe 30. The housing 10 has a first receiving cavity 10a; the battery cell assembly 20 is disposed within the first receiving cavity 10a, and the battery cell assembly 20 includes a plurality of battery cells 21. Each battery cell 21 is provided with a first pressure relief mechanism 211; the exhaust pipe 30 is connected to the housing 10, and the exhaust pipe 30 is used to collect the emissions from the battery cells 21 when the first pressure relief mechanism 211 is actuated, and to discharge the emissions from the housing 10. The exhaust pipe 30 has at least one corner 31.

[0117] The first receiving cavity 10a is a cavity formed by the wall of the housing 10, used to receive the battery cell assembly 20.

[0118] In some embodiments, the housing 10 may include a first sub-housing 10b and a second sub-housing 10c, the first sub-housing 10b and the second sub-housing 10c overlapping each other, the first sub-housing 10b and the second sub-housing 10c together defining a first receiving cavity 10a for accommodating the battery cell assembly 20. The second sub-housing 10c may be a hollow structure with one end open, and the first sub-housing 10b may be a plate-like structure, the first sub-housing 10b covering the opening side of the second sub-housing 10c, so that the first sub-housing 10b and the second sub-housing 10c together define the first receiving cavity 10a; the first sub-housing 10b and the second sub-housing 10c may also be hollow structures with one side open, the opening side of the first sub-housing 10b covering the opening side of the second sub-housing 10c.

[0119] In some embodiments, the first sub-box 10b can be a cover, the second sub-box 10c can be a lower box, and the battery cell assembly 20 can be supported by the lower box.

[0120] In the battery device 100, multiple battery cells 21 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 21 are connected in both series and parallel configurations. The battery device 100 may also include other structures, such as a busbar component for realizing electrical connections between multiple battery cells 21.

[0121] The first pressure relief mechanism 211 is an element or component that is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The first pressure relief mechanism 211 can take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell 21 reaches the predetermined threshold, the first pressure relief mechanism 211 performs an action or a weak structure provided in the first pressure relief mechanism 211 is destroyed, thereby forming an opening or channel for releasing internal pressure or temperature.

[0122] The term "actuation" as used in this application refers to the activation of the first pressure relief mechanism 211 to a certain state, thereby releasing the internal pressure and temperature of the battery cell 21. The action of the first pressure relief mechanism 211 may include, but is not limited to, at least a portion of the first pressure relief mechanism 211 rupturing, breaking, tearing, or opening, etc. When the first pressure relief mechanism 211 is activated, the high-temperature, high-pressure substances inside the battery cell 21 are discharged outwards from the activated portion as waste. This method allows for pressure and temperature relief of the battery cell 21 under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0123] The emissions from the battery cell 21 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0124] The exhaust pipe 30 is a component used to collect the emissions from the battery cells 21 inside the housing 10 and to discharge the emissions to the outside of the housing 10.

[0125] In some embodiments, the air inlet end of the exhaust pipe 30 may communicate with the first receiving cavity 10a. For example, the air inlet end of the exhaust pipe 30 may be located inside the first receiving cavity 10a, or the wall of the housing 10 may have a through hole through which the air inlet end of the exhaust pipe 30 communicates with the first receiving cavity 10a; alternatively, the air inlet end of the exhaust pipe 30 may also be located inside the first receiving cavity 10a and communicate with the first pressure relief mechanism 211. In the above embodiments, the air inlet end of the exhaust pipe 30 is open.

[0126] In other embodiments, the air inlet of the exhaust pipe 30 is closed. When the battery cell 21 thermally runs away, the emissions from the battery cell 21 act on the exhaust pipe 30 and melt the pipe wall of the exhaust pipe 30, thereby forming an opening, so that the air inlet of the exhaust pipe 30 is opened and the emissions enter the exhaust pipe 30 through the air inlet.

[0127] Angle 31 refers to the angle or bend formed when the exhaust pipe 30 changes direction in the layout, and is usually used to connect two pipe sections or to turn the exhaust pipe 30. Angle 31 can change the flow direction of the fluid (emissions from the battery cell 21) inside the exhaust pipe 30.

[0128] When battery cell 21 experiences thermal runaway, the emissions from battery cell 21 enter the exhaust pipe 30 through the air inlet. The exhaust pipe 30 guides the flow, and the bend 31 alters the flow direction, increasing the path of the flue gas within the exhaust pipe 30, buffering the gas velocity, and increasing the contact time between the gas and the pipe wall. This facilitates heat exchange between the gas and the exhaust pipe 30, and allows water vapor to condense on the pipe wall. Simultaneously, solid particles in the emissions will deposit within the exhaust pipe 30, resulting in a lower concentration of flue gas emitted from the exhaust pipe 30.

[0129] According to the battery device 100 of this application embodiment, an exhaust pipe 30 is connected to a housing 10. The exhaust pipe 30 collects emissions from the battery cells 21 when the first pressure relief mechanism 211 is actuated. The emissions are discharged outside the housing 10 via the exhaust pipe 30, which reduces the concentration and temperature of the flue gas. Specifically, after the emissions from the battery cells 21 enter the exhaust pipe 30, they pass through at least one bend 31, increasing the flow path of the flue gas within the exhaust pipe 30. This buffers the flow rate of the flue gas and increases the contact time between the flue gas and the wall of the exhaust pipe 30, allowing for heat exchange between the high-temperature flue gas and the exhaust pipe 30, facilitating temperature reduction and improving condensation. Simultaneously, solid particles in the emissions can deposit within the exhaust pipe 30, thereby reducing the concentration of flue gas in the emissions discharged from the exhaust pipe 30 and reducing environmental pollution caused by emissions from the battery device 100 in the event of thermal runaway.

[0130] According to some embodiments of this application, the length of the exhaust pipe 30 is L, which satisfies L≥0.5m.

[0131] The length of the exhaust pipe 30 can be the extended length of the exhaust pipe 30, for example, the overall length of the exhaust pipe 30 after it is unfolded.

[0132] In order to facilitate delaying the time for emissions to exit the housing 10 and increase the flow path of emissions within the exhaust pipe 30, when the length of the exhaust pipe 30 is small, such as when the length of the exhaust pipe 30 is 0.5m, the number of corners 31 can be greater than or equal to 20.

[0133] In the above scheme, the length of the exhaust pipe 30 satisfies the above relationship, and the flow path of the emissions in the exhaust pipe 30 is relatively long, which facilitates the reduction of flue gas temperature and the deposition of solid particles, thereby reducing the pollution of the environment caused by the emissions emitted in the event of thermal runaway of the battery device 100.

[0134] According to some embodiments of this application, 2m≤L≤20m.

[0135] The length L of the exhaust pipe 30 can be, but is not limited to, any one or any two of the following: 2m, 2.5m, 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, 6m, 6.5m, 7m, 7.5m, 8m, 8.5m, 9m, 9.5m, 10m, 10.5m, 11m, 11.5m, 12m, 12.5m, 13m, 13.5m, 14m, 14.5m, 15m, 15.5m, 16m, 16.5m, 17m, 17.5m, 18m, 18.5m, 19m, 19.5m, and 20m.

[0136] In the above scheme, when the length of the exhaust pipe 30 is greater than or equal to 2m, the emissions have a longer flow path in the exhaust pipe 30, which is conducive to the reduction of flue gas temperature and the deposition of solid particles; when the length of the exhaust pipe 30 is less than or equal to 20m, the exhaust pipe 30 can occupy less space and has a lower cost while meeting the requirements of reducing flue gas temperature and concentration.

[0137] According to some embodiments of this application, the number of corners 31 is M, where M≥4.

[0138] In some embodiments, taking the box 10 as a cuboid as an example, when the length of the exhaust pipe 30 is relatively long, the exhaust pipe 30 can be arranged around the four walls of the box 10 along the circumference of the box 10. The number of corners 31 of the exhaust pipe 30 can be 4, which is simple in structure and easy to process and manufacture.

[0139] In some embodiments, when the length of the exhaust pipe 30 is short, the number of bends 31 needs to be designed to be greater. For example, the number of bends 31 can be greater than 20, so that the exhaust gas has a longer flow path in the exhaust pipe 30, which facilitates the condensation of flue gas or the deposition of solid particles in the exhaust gas, thereby reducing the temperature and concentration of the exhaust gas.

[0140] In the above scheme, the number of corners 31 is greater than or equal to 4. The emissions collide with the pipe wall of the exhaust pipe 30 multiple times, the temperature of the flue gas decreases, and solid particles can be deposited in the exhaust pipe 30, so that the emissions discharged through the exhaust pipe 30 have less pollution to the environment. For example, when the exhaust pipe 30 is provided with four corners 31, the four corners 31 can be set at the four corners of the cuboid-shaped box 10. The exhaust pipe 30 can be arranged around the cuboid-shaped box 10. The exhaust pipe 30 has a long length, and the flow path of the emissions in the exhaust pipe 30 is long. The emissions pass through the four corners 31, which is conducive to the reduction of flue gas temperature and the deposition of solid particles.

[0141] According to some embodiments of this application, the air inlet end of the exhaust pipe 30 is connected to the first receiving cavity 10a, and the exhaust end of the exhaust pipe 30 is connected to the outside of the housing 10.

[0142] The air inlet of the exhaust pipe 30 is an open structure, and the air inlet of the exhaust pipe 30 is connected to the first receiving cavity 10a to facilitate the collection of emissions from the battery cell 21. For example, in the event of thermal runaway of the battery cell 21, the first pressure relief mechanism 211 is activated to discharge the emissions from the battery cell 21. The high-temperature and high-pressure emissions accumulate in the housing 10 and flow toward the air inlet of the exhaust pipe 30, enter the exhaust pipe 30, and are discharged from the housing 10 through the exhaust end of the exhaust pipe 30.

[0143] In the above scheme, the air inlet of the exhaust pipe 30 is connected to the first receiving cavity 10a, which facilitates the collection of emissions from the battery cell 21; the exhaust end of the exhaust pipe 30 is connected to the outside of the housing 10, and the emissions from the battery cell 21 are discharged from the housing 10 after passing through the exhaust pipe 30, which is conducive to the cooling of the emissions and the deposition of solid particles.

[0144] Please refer to Figure 5, which is a cross-sectional view of an exhaust pipe provided in some embodiments of this application. According to some embodiments of this application, an exhaust channel 32 is formed inside the exhaust pipe 30, and the minimum cross-sectional area of ​​the exhaust channel 32 is W, satisfying 50 mm. 2 ≤W≤1000mm 2 .

[0145] The exhaust passage 32 is the area inside the exhaust pipe 30 used for the flow of exhaust materials.

[0146] The cross-sectional area of ​​the exhaust passage 32 refers to the area of ​​the cross-section obtained by cutting the exhaust pipe 30 along a cutting plane perpendicular to the extension direction of the exhaust pipe 30. The cross-sectional areas of the exhaust passage 32 at different locations along the extension direction of the exhaust pipe 30 can be the same or different. The minimum cross-sectional area of ​​the exhaust passage 32 refers to the minimum cross-sectional area of ​​the exhaust passage 32 at all locations along the extension direction of the exhaust pipe 30.

[0147] The minimum cross-sectional area W of the exhaust passage 32 can be, but is not limited to, 50 mm. 2 100mm 2 150mm 2 200mm 2 250mm 2 300mm 2 350mm 2 400mm 2 450mm 2 500mm 2 550mm 2 650mm 2 700mm 2 750mm 2 800mm 2 850mm 2 900mm 2 950mm 2 1000mm 2 The range between any one of them or any two of them.

[0148] In the above scheme, the minimum cross-sectional area of ​​the exhaust channel 32 is greater than or equal to 50 mm. 2This facilitates the entry of emissions from battery cell 21 into exhaust channel 32, and the emissions have a high flow velocity within exhaust channel 32, which is beneficial for depressurization of battery device 100; the minimum cross-sectional area of ​​exhaust channel 32 is less than or equal to 1000 mm². 2 The exhaust pipe 30 occupies a small space, which is conducive to the collection of emissions from the battery cell 21 by the exhaust pipe 30 and the emissions have a high flow rate when they are discharged from the exhaust channel 32.

[0149] According to some embodiments of this application, 200mm 2 ≤W≤500mm 2 .

[0150] Optionally, the minimum cross-sectional area W of the exhaust passage 32 can be, but is not limited to, 200 mm. 2 220mm 2 240mm 2 260mm 2 280mm 2 300mm 2 320mm 2 340mm 2 360mm 2 380mm 2 400mm 2 420mm 2 440mm 2 460mm 2 480mm 2 500mm 2 The range between any one of them or any two of them.

[0151] In the above scheme, when W≥200mm 2 When W≤500mm, the exhaust pipe 30 has a large flow area, which facilitates the rapid flow of exhaust materials within the exhaust pipe 30; 2 At the same time, when the exhaust pipe 30 is conducive to collecting the emissions from the battery cell 21 and the emissions have a high flow rate when exiting the exhaust channel 32, the space occupied by the exhaust pipe 30 is further reduced.

[0152] Please refer to Figure 5. According to some embodiments of this application, the exhaust pipe 30 has at least one enlarged portion 33.

[0153] The expansion section 33 can be understood as a part in the extension direction of the exhaust pipe 30 where the cross-sectional area of ​​the exhaust passage 32 is increased. For example, the inner diameter and outer diameter of the exhaust pipe 30 are increased at the expansion section 33.

[0154] In some embodiments, the exhaust pipe 30 may include multiple pipe segments, some of which have the same and smaller cross-sectional area, while other segments may be expansion sections 33, which connect two pipe segments with smaller cross-sectional areas.

[0155] In the above scheme, the expansion section 33 can be regarded as the part where the cross-sectional area of ​​the exhaust channel 32 inside the exhaust pipe 30 increases. After the emission material enters the expansion section 33 from the small diameter area, the flow rate of the emission material slows down and the temperature of the flue gas decreases. The liquid after the flue gas condenses and the solid particles in the flue gas can settle in the expansion section 33 to achieve the effect of reducing the flue gas temperature and the flue gas concentration.

[0156] Referring to Figure 4, according to some embodiments of this application, the exhaust pipe 30 includes a plurality of pipe segments 34 arranged sequentially along its extension direction. From the air inlet end of the exhaust pipe 30 to the air outlet end of the exhaust pipe 30, the melting points of the plurality of pipe segments 34 decrease sequentially.

[0157] Multiple pipe segments 34 are multiple parts of the exhaust pipe 30 distributed along its extension direction. The multiple pipe segments 34 are set separately and connected sequentially along the extension direction of the exhaust pipe 30.

[0158] The melting points of the multiple pipe sections 34 are different. According to the melting point, the melting points of the multiple pipe sections 34 decrease sequentially from the air inlet end of the exhaust pipe 30 to the air outlet end of the exhaust pipe 30.

[0159] In the above scheme, the pipe segment 34 closest to the intake end of the exhaust pipe 30 has the highest melting point, so as to facilitate the collection of high-temperature emissions; since the multiple pipe segments 34 have different melting points, pipe segments 34 made of different materials can be set, which on the one hand, helps to reduce costs, and on the other hand, facilitates the assembly of multiple pipe segments 34.

[0160] According to some embodiments of this application, the melting point of the exhaust pipe 30 is greater than or equal to 80°C.

[0161] In some embodiments, the exhaust pipe 30 may be made of polypropylene, polycarbonate, polyethylene terephthalate, etc.

[0162] In the above scheme, the melting point of the exhaust pipe 30 is greater than or equal to 80°C, and the exhaust pipe 30 has high high temperature resistance, which facilitates the collection of high temperature emissions.

[0163] According to some embodiments of this application, the thickness of the wall portion of the housing 10 is less than or equal to 10 mm.

[0164] In the above scheme, the thickness of the wall of the housing 10 satisfies the above relationship, and the wall of the housing 10 can be designed to be thinner, which is conducive to improving the energy density of the battery device 100.

[0165] In some embodiments, when the wall thickness of the housing 10 is relatively thin (e.g., less than or equal to 10 mm), the material of the housing 10 can be aluminum, aluminum alloy, steel, stainless steel, etc.

[0166] Referring to Figure 3, according to some embodiments of this application, the housing 10 includes a side wall 11 and a bottom wall 12. The side wall 11 surrounds the bottom wall 12, and the bottom wall 12 carries the battery cell assembly 20. The exhaust pipe 30 is arranged circumferentially along the side wall 11.

[0167] The bottom wall 12 is used to support the battery cell assembly 20.

[0168] The side wall 11 surrounds the bottom wall 12. In some embodiments, the housing 10 also includes a cover 13. The cover 13 and the bottom wall 12 are disposed opposite each other along the thickness direction Z of the bottom wall. The end of the side wall 11 away from the bottom wall 12 is connected to the cover 13. The battery cell assembly 20 is disposed between the cover 13 and the bottom wall 12.

[0169] The circumferential direction of the sidewall 11 can be the direction in which the sidewall 11 is set around the edge of the bottom wall 12.

[0170] The exhaust pipe 30 is arranged circumferentially along the side wall 11. The exhaust pipe 30 can be disposed in the first receiving cavity 10a, or on the inner circumferential surface of the side wall 11. The exhaust pipe 30 can also have a gap with the inner circumferential surface of the side wall 11. The exhaust pipe 30 can also be disposed outside the housing 10, or on the outer circumferential surface of the side wall 11. The exhaust pipe 30 can also have a gap with the outer circumferential surface of the side wall 11.

[0171] Optionally, the exhaust pipe 30 can be disposed on the side wall 11 to facilitate the assembly and positioning of the exhaust pipe 30.

[0172] In the above scheme, the side wall 11 is arranged around the bottom wall 12, and the exhaust pipe 30 is arranged along the circumference of the side wall 11 to facilitate the assembly of the exhaust pipe 30 with the housing 10.

[0173] Please refer to Figures 3 and 4. According to some embodiments of this application, the exhaust pipe 30 is arranged in a spiral shape along the circumference of the sidewall 11.

[0174] The exhaust pipe 30 is spirally arranged along the circumference of the side wall 11, and the exhaust pipe 30 is arranged around the circumference of the side wall 11 multiple times, so that the length of the exhaust pipe 30 is relatively long.

[0175] In some embodiments, when the exhaust pipe 30 is arranged in a spiral shape along the circumference of the side wall 11, the exhaust pipe 30 may have a corner 31 at the corner of the side wall 11, or the exhaust pipe 30 may have a rounded transition at the corner of the side wall 11.

[0176] In some embodiments, the exhaust pipe 30 may be arranged around the battery cell assembly 20 to reduce the risk of interference between the exhaust pipe 30 and the battery cell assembly 20 and to facilitate the assembly of the exhaust pipe 30.

[0177] In the above scheme, the exhaust pipe 30 is spirally arranged along the circumference of the side wall 11. The exhaust pipe 30 has a relatively long length and can be provided with multiple bends 31, which facilitates the reduction of the temperature of the emissions and the reduction of the flue gas concentration.

[0178] Referring to Figure 3, according to some embodiments of this application, the sidewall 11 includes a plurality of sub-sidewalls 111 connected end to end, and the portions of the exhaust pipe 30 located in two adjacent sub-sidewalls 111 are connected by a corner 31.

[0179] Multiple sub-sidewalls 111 are connected end to end to form a structure with openings at both ends, and one end of the multiple sub-sidewalls 111 is connected to the bottom wall 12.

[0180] "The portion of the exhaust pipe 30 located on the two adjacent sub-side walls 111 is connected by a corner 31" means that at the intersection of the two adjacent sub-side walls 111, the exhaust pipe 30 forms a corner 31, which connects the portion of the exhaust pipe 30 located on the two adjacent sub-side walls 111.

[0181] In some embodiments, the housing 10 can be a polygonal prism, for example, the housing 10 can be a cuboid.

[0182] In the above scheme, multiple sub-sidewalls 111 are connected end to end, and the portions of the exhaust pipe 30 located on two adjacent sub-sidewalls 111 are connected by corners 31. The exhaust pipe 30 has more corners 31, which increases the obstruction of the pipe wall of the exhaust pipe 30 to the flowing emissions, which is conducive to reducing the temperature of the emissions and the deposition of solid particles.

[0183] Please refer to Figures 3 and 4. According to some embodiments of this application, the exhaust pipe 30 includes a plurality of pipe segments 34. Along the extension direction of the exhaust pipe 30, two adjacent pipe segments 34 are respectively connected to two adjacent sub-side walls 111, and a corner 31 is formed between two adjacent pipe segments 34.

[0184] "Along the extension direction of the exhaust pipe 30, two adjacent pipe segments 34 are respectively connected to two adjacent sub-side walls 111" can be understood as each pipe segment 34 being provided on a sub-side wall 111, and along the extension direction of the exhaust pipe 30, a corner 31 is formed between two adjacent pipe segments 34 so that the outline of the exhaust pipe 30 can match the outline of the side wall 11.

[0185] In the above scheme, the pipe segment 34 can be set corresponding to the sub-side wall 111, which is convenient for processing and manufacturing; two adjacent pipe segments 34 are respectively connected to two adjacent sub-side walls 111, and a corner 31 is formed between the two adjacent pipe segments 34, which is convenient for the assembly of the exhaust pipe 30 and the housing 10.

[0186] Please refer to Figures 6 to 9. Figure 6 is a schematic diagram of the assembly of the exhaust pipe and the housing according to some embodiments of this application. Figure 7 is a schematic diagram of the structure of the exhaust pipe in Figure 6. Figure 8 is a schematic diagram of the assembly of the exhaust pipe and the housing according to some other embodiments of this application. Figure 9 is a schematic diagram of the structure of the exhaust pipe in Figure 8. According to some embodiments of this application, the exhaust pipe 30 includes a plurality of first pipe sections 341 and at least one second pipe section 342. Along the extending direction of the exhaust pipe 30, the first pipe sections 341 and the second pipe sections 342 are alternately arranged. The plurality of first pipe sections 341 are parallel to each other and spaced apart. An angle 31 is formed between the first pipe section 341 and the second pipe section 342.

[0187] In some embodiments, the exhaust pipe 30 may be disposed on any wall of the housing 10, for example, at least one of the side wall 11, bottom wall 12, and cover 13 of the housing 10.

[0188] Optionally, the exhaust pipe 30 is disposed on the side wall 11 of the housing 10. For example, the exhaust pipe 30 is disposed on one sub-side wall 111, or the exhaust pipe 30 is disposed on multiple sub-side walls 111.

[0189] Optionally, the exhaust pipe 30 is disposed on the side wall 11 and bottom wall 12 of the housing 10.

[0190] In some embodiments, a plurality of first pipe sections 341 and at least one second pipe section 342 may be provided on the wall portion of the housing 10 where the exhaust pipe 30 is provided.

[0191] In some embodiments, the exhaust pipe 30 may be S-shaped, for example, the exhaust pipe 30 may be bent into an S-shape, or the exhaust pipe 30 may be formed by connecting multiple separately arranged pipe segments 34.

[0192] In some embodiments, along the extension direction of the exhaust pipe 30, two adjacent second pipe segments 342 are located on both sides of the first pipe segment 341.

[0193] In some embodiments, the length of the first pipe segment 341 and the length of the second pipe segment 342 can be the same, which facilitates processing and manufacturing. In other embodiments, the length of the first pipe segment 341 and the length of the second pipe segment 342 can be different. For example, the length of the first pipe segment 341 can be greater than the length of the second pipe segment 342, or the length of the first pipe segment 341 can be less than the length of the second pipe segment 342.

[0194] In the above scheme, multiple first pipe sections 341 are arranged parallel to each other and spaced apart. An angle 31 is formed between the first pipe section 341 and the second pipe section 342, which allows the length of the exhaust pipe 30 to be designed to be longer. The emissions have a longer flow path in the exhaust pipe 30, which improves the flue gas condensation effect and facilitates the deposition of solid particles.

[0195] Please refer to Figures 7 and 9. According to some embodiments of this application, the length of the first pipe segment 341 is greater than the length of the second pipe segment 342.

[0196] Since multiple first pipe segments 341 are parallel to each other and the length of the second pipe segment 342 is relatively short, the gap between multiple parallel first pipe segments 341 is small. More first pipe segments 341 and corners 31 can be set to improve the space utilization of the exhaust pipe 30, so that the length of the exhaust pipe 30 can be designed to be longer, so as to increase the flow path of the exhaust in the exhaust pipe 30.

[0197] In some embodiments, the length of the second pipe segment 342 may be less than one-fifth the length of the first pipe segment 341, so that the gap between the plurality of first pipe segments 341 can be smaller, which facilitates the improvement of the space utilization of the exhaust pipe 30.

[0198] Please refer to Figures 6 and 8. According to some embodiments of this application, the housing 10 includes a side wall 11 and a bottom wall 12. The bottom wall 12 carries the battery cell assembly 20. The side wall 11 surrounds the bottom wall 12. A first pipe segment 341 and a second pipe segment 342 are disposed on the side wall 11.

[0199] The bottom wall 12 has a certain strength to support the battery cell assembly 20.

[0200] The side wall 11 surrounds the bottom wall 12. The first pipe section 341 and the second pipe section 342 are disposed on the side wall 11 to reduce the assembly space occupied by the exhaust pipe 30 in the thickness direction Z of the bottom wall and reduce the risk of interference between the exhaust pipe 30 and other components.

[0201] There are various ways to connect the first pipe segment 341 and the second pipe segment 342 to the side wall 11. For example, the first pipe segment 341 and the second pipe segment 342 can be connected to the side wall 11 through a connector, or the first pipe segment 341 and the second pipe segment 342 can be snapped or glued to the side wall 11.

[0202] In the above scheme, the first pipe section 341 and the second pipe section 342 are disposed on the side wall 11 to facilitate the assembly of the exhaust pipe 30 and the housing 10.

[0203] The extension direction of the first pipe segment 341 refers to the length direction of the first pipe segment 341 as a whole. For example, when the first pipe segment 341 is straight, the extension direction of the first pipe segment 341 is the length direction of the first pipe segment 341; or, for example, when the first pipe segment 341 is corrugated, the extension direction of the first pipe segment 341 can be regarded as the extension direction of the line connecting the two ends of the first pipe segment 341.

[0204] Please refer to Figures 6 and 7. According to some embodiments of this application, the extension direction of the first pipe segment 341 intersects the thickness direction Z of the bottom wall.

[0205] In some embodiments, the extension direction of the first pipe segment 341 is perpendicular to the thickness direction Z of the bottom wall.

[0206] In some embodiments, the first pipe segment 341 and the second pipe segment 342 may be disposed on each sub-sidewall 111. On each sub-sidewall 111, a plurality of first pipe segments 341 may be disposed along the thickness direction Z of the bottom wall so that the plurality of first pipe segments 341 are disposed in multiple layers. At the intersection of two adjacent sub-sidewalls 111, the first pipe segments 341 located on the two sub-sidewalls 111 may be connected by a corner 31 so that the exhaust pipe 30 is distributed on the plurality of sub-sidewalls 111.

[0207] Furthermore, in order to facilitate the circumferential arrangement of the exhaust pipe 30 around the side wall 11, the first pipe segment 341 and the second pipe segment 342 of different sub-side walls 111 can be provided with the same number of layers. Among the multiple first pipe segments 341 on each sub-side wall 111, the first pipe segments 341 at both ends located in the thickness direction Z of the bottom wall are used to connect with the first pipe segments 341 on the adjacent sub-side wall 111.

[0208] For example, a plurality of first pipe sections 341 have first end pipe sections 341a and second end pipe sections 341b at both ends along the thickness direction Z of the bottom wall, with the first end pipe section 341a being away from the bottom wall 12 relative to the second end pipe section 341b; the side wall 11 has a first sub-side wall 111a and a second sub-side wall 111b arranged opposite each other along the first direction X, and a third sub-side wall 111c and a fourth sub-side wall 111d arranged opposite each other along the second direction Y, with the first direction X, the second direction Y and the thickness direction Z of the bottom wall being perpendicular to each other. Taking the first pipe segment 341 disposed on the first sub-side wall 111a as an example, the first pipe segment 341 extends along the second direction Y. The end of the first end pipe segment 341a near the fourth sub-side wall 111d is connected to the first pipe segment 341 disposed on the fourth sub-side wall 111d through a corner 31. The end of the first end pipe segment 341a near the third sub-side wall 111c is connected to the adjacent second pipe segment 342 through a corner 31. The end of the second end pipe segment 341b near the third sub-side wall 111c is connected to the first pipe segment 341 disposed on the third sub-side wall 111c through a corner 31. The end of the second end pipe segment 341b near the fourth sub-side wall 111d is connected to the adjacent second pipe segment 342 through a corner 31.

[0209] In the above scheme, the extension direction of the first pipe segment 341 can be the length direction of the first pipe segment 341. The length direction of the first pipe segment 341 intersects with the thickness direction Z of the bottom wall. Multiple first pipe segments 341 can be set in the thickness direction Z of the bottom wall to make use of the space in the thickness direction Z of the bottom wall.

[0210] Please refer to Figures 8 and 9. According to some embodiments of this application, the extension direction of the first pipe segment 341 is parallel to the thickness direction Z of the bottom wall.

[0211] The extension direction of the first pipe segment 341 is parallel to the thickness direction Z of the bottom wall. The first pipe segment 341 can be longer in the thickness direction Z of the bottom wall, and the length of the second pipe segment 342 can be smaller, so as to provide more first pipe segments 341 in the circumferential direction of the side wall 11. Multiple first pipe segments 341 can be arranged around the circumferential direction of the side wall 11.

[0212] When multiple first pipe segments 341 are arranged circumferentially around the side wall 11, the multiple first pipe segments 341 can be arranged on multiple sub-side walls 111, and the first pipe segments 341 located on two adjacent sub-side walls 111 can be connected by a corner 31.

[0213] In the above scheme, the extension direction of the first pipe segment 341 can be the length direction of the first pipe segment 341, which is parallel to the thickness direction Z of the bottom wall. Multiple first pipe segments 341 can be arranged in the circumferential direction of the side wall 11 to make good use of the space in the circumferential direction of the side wall 11. At the same time, the length of the second pipe segment 342 can be relatively short, and the distance between two adjacent first pipe segments 341 can be relatively small, so as to arrange more first pipe segments 341 in the circumferential direction of the side wall 11. The length of the exhaust pipe 30 can be designed to be relatively long, which is beneficial to reduce the temperature of the emissions and reduce the concentration of flue gas.

[0214] Please refer to Figures 3, 6 and 8. According to some embodiments of this application, the exhaust pipe 30 is disposed inside the housing 10.

[0215] The exhaust pipe 30 can be disposed on the inner surface of the housing 10. For example, the exhaust pipe 30 can be disposed on the inner surface of the side wall 11, or on the inner surface of the side wall 11 and the bottom wall 12.

[0216] Optionally, the exhaust pipe 30 is disposed on the inner surface of the side wall 11 to facilitate the assembly and positioning of the exhaust pipe 30.

[0217] In the above scheme, the exhaust pipe 30 is set inside the housing 10, which facilitates the protection of the exhaust pipe 30 and reduces the space occupied by the exhaust pipe 30 on the outside of the housing 10.

[0218] In some embodiments, when the exhaust pipe 30 is disposed inside the housing 10, the exhaust pipe 30 may be located on the side of the battery cell assembly 20 away from the bottom wall 12. For example, the exhaust pipe 30 may be disposed on the cover 13, or the exhaust pipe 30 may be disposed circumferentially around the side wall 11. The exhaust pipe 30 may also be located on the side of the battery cell assembly 20 facing the bottom wall 12. For example, the exhaust pipe 30 may be disposed on the bottom wall 12, or the exhaust pipe 30 may be disposed circumferentially around the side wall 11.

[0219] Please refer to Figure 10, which is a schematic diagram showing an exhaust pipe disposed outside the housing according to some embodiments of this application. According to some embodiments of this application, the exhaust pipe 30 is disposed outside the housing 10.

[0220] The exhaust pipe 30 can be provided on the outer surface of the housing 10. For example, the exhaust pipe 30 can be provided on the outer surface of the side wall 11, or the exhaust pipe 30 can be provided on the outer surface of the side wall 11 and the outer surface of the bottom wall 12.

[0221] In the above scheme, the exhaust pipe 30 is set outside the box 10, which reduces the space occupied by the exhaust pipe 30 inside the box 10, facilitates the improvement of space utilization inside the box 10, and allows for the installation of more battery cell modules 20 inside the box 10.

[0222] Please refer to Figure 11, which is a schematic diagram of the assembly of the protective component and the housing provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a protective component 40, which is located outside the housing 10 and connected to the housing 10. The protective component 40 and the housing 10 form a second receiving cavity 40a, and at least a portion of the exhaust pipe 30 is disposed in the second receiving cavity 40a.

[0223] The protective component 40 is a component used to shield the exhaust pipe 30. The protective component 40 is disposed outside the housing 10 so as to cooperate with the housing 10 to form a second receiving cavity 40a for accommodating the exhaust pipe 30.

[0224] In some embodiments, the protective element 40 may be detachably connected to the housing 10, for example, by snap-fitting or threading the protective element 40 to the housing 10, so as to facilitate maintenance or replacement of the exhaust pipe 30.

[0225] The protective component 40 can be made of metal, such as aluminum, aluminum alloy, steel, etc.; the protective component 40 can also be made of non-metal, such as plastic, rubber, etc.

[0226] In the above scheme, the protective component 40 and the housing 10 form a second receiving cavity 40a, and at least a portion of the exhaust pipe 30 is disposed in the second receiving cavity 40a in order to protect the exhaust pipe 30 and reduce the risk of damage to the exhaust pipe 30.

[0227] Please refer to Figure 12, which is a schematic diagram of the assembly of the exhaust pipe and the second pressure relief mechanism provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a second pressure relief mechanism 50, which is disposed at the exhaust end of the exhaust pipe 30. The second pressure relief mechanism 50 is used to release the emissions from the battery cell 21.

[0228] In some embodiments, the second pressure relief mechanism 50 may be an explosion-proof valve, a balancing valve, or the like. The second pressure relief mechanism 50 is used to reduce the entry of external dust, liquids, and other impurities into the first receiving cavity 10a.

[0229] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0230] The power supply device can be any of the above-mentioned devices or systems that use the battery device 100 as a power source.

[0231] According to some embodiments of this application, please refer to Figures 2 to 12. This application provides a battery device 100, which includes a housing 10, a battery cell assembly 20, and an exhaust pipe 30. The housing 10 includes a bottom wall 12, side walls 11, and a cover 13. The bottom wall 12 is used to support the battery cell assembly 20. The side walls 11 are arranged around the bottom wall 12. The cover 13 and the bottom wall 12 are arranged opposite to each other along the thickness direction Z of the bottom wall. One end of the side wall 11 is connected to the bottom wall 12, and the other end of the side wall 11 is connected to the cover 13. The bottom wall 12, the side walls 11, and the cover 13 form a first receiving cavity 10a. The side walls 11 include a plurality of sub-side walls 111 connected end to end.

[0232] The battery cell assembly 20 is disposed within the first receiving cavity 10a, and the bottom wall 12 supports the battery cell assembly 20. The battery cell assembly 20 includes a plurality of battery cells 21, and each battery cell 21 is provided with a first pressure relief mechanism 211.

[0233] An exhaust pipe 30 is connected to the housing 10. The exhaust pipe 30 is used to collect the emissions from the battery cells 21 when the first pressure relief mechanism 211 is actuated, and to discharge the emissions from the housing 10. The length of the exhaust pipe 30 is greater than or equal to 2m and less than or equal to 20m. The exhaust pipe 30 has at least 20 bends 31. The portions of the exhaust pipe 30 located on two adjacent sub-side walls 111 are connected by the bends 31.

[0234] In some embodiments, referring to Figure 3, an exhaust pipe 30 is disposed within a first receiving cavity 10a, with its inlet end communicating with the first receiving cavity 10a and its exhaust end communicating with the outside of the housing 10. The exhaust pipe 30 is disposed on the inner surface of the side wall 11, and is spirally arranged around the side wall 11 of the housing 10. The exhaust end of the exhaust pipe 30 passes through the housing 10 and communicates with the outside. In the above embodiment, the exhaust pipe 30 is arranged circumferentially along the side wall 11 and is spirally arranged, making reasonable use of the space within the first receiving cavity 10a. The length of the exhaust pipe 30 can be designed to be relatively long to reduce the temperature of the emissions discharged from the exhaust pipe 30 and reduce the content of the flue gas.

[0235] In some embodiments, referring to FIG6, an exhaust pipe 30 is disposed within a first receiving cavity 10a. The exhaust pipe 30 includes a plurality of first pipe segments 341 and at least one second pipe segment 342. Along the extending direction of the exhaust pipe 30, the first pipe segments 341 and the second pipe segments 342 are alternately arranged. The plurality of first pipe segments 341 are parallel to each other and spaced apart. An angle 31 is formed between the first pipe segments 341 and the second pipe segments 342. Both the first pipe segments 341 and the second pipe segments 342 are disposed on the side wall 11. The length of the first pipe segment 341 is greater than the length of the second pipe segment 342. The extending direction of the first pipe segment 341 is perpendicular to the thickness direction Z of the bottom wall. In the above scheme, on each sub-sidewall 111, multiple first pipe segments 341 are spaced apart along the thickness direction Z of the bottom wall. The distance between two adjacent first pipe segments 341 can be relatively short, so that more first pipe segments 341 can be set on the sub-sidewall 111, and the number of corners 31 is also more, which can increase the flow path of the emissions in the exhaust pipe 30, so as to reduce the temperature of the emissions discharged from the exhaust pipe 30 and reduce the content of flue gas.

[0236] In some embodiments, referring to FIG8, an exhaust pipe 30 is disposed within a first receiving cavity 10a. The exhaust pipe 30 includes a plurality of first pipe segments 341 and at least one second pipe segment 342. Along the extending direction of the exhaust pipe 30, the first pipe segments 341 and the second pipe segments 342 are alternately arranged. The plurality of first pipe segments 341 are parallel to each other and spaced apart. An angle 31 is formed between the first pipe segments 341 and the second pipe segments 342. Both the first pipe segments 341 and the second pipe segments 342 are disposed on the side wall 11. The length of the first pipe segment 341 is greater than the length of the second pipe segment 342. The extending direction of the first pipe segment 341 is parallel to the thickness direction Z of the bottom wall. In the above scheme, on each sub-sidewall 111, multiple first pipe segments 341 are arranged circumferentially along the sidewall 11. The length of the second pipe segment 342 can be relatively short to facilitate the arrangement of multiple first pipe segments 341. The number of bends 31 can be relatively large. The length of the exhaust pipe 30 can be designed to be relatively long, which can increase the flow path of the emissions in the exhaust pipe 30, so as to reduce the temperature of the emissions discharged from the exhaust pipe 30 and reduce the content of flue gas.

[0237] In some embodiments, referring to Figures 10 and 11, the exhaust pipe 30 is disposed outside the housing 10 and on the side wall 11 and bottom wall 12. The battery device 100 also includes a protective member 40, which is located outside the housing 10 and connected to the housing 10. The protective member 40 and the housing 10 form a second receiving cavity 40a, and at least a portion of the exhaust pipe 30 is disposed within the second receiving cavity 40a. In the above embodiment, the exhaust pipe 30 is disposed outside the housing 10, which does not occupy the space within the first receiving cavity 10a, facilitating the placement of more battery cell assemblies 20 and enabling the battery device 100 to have a higher volumetric energy density. At the same time, the protective member 40 protects the exhaust pipe 30 and reduces the risk of damage to the exhaust pipe 30.

[0238] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: The housing has a first receiving cavity; A battery cell assembly is disposed within the first receiving cavity. The battery cell assembly includes multiple battery cells, and each battery cell is provided with a first pressure relief mechanism. An exhaust pipe is connected to the housing. The exhaust pipe is used to collect the emissions from the battery cells when the first pressure relief mechanism is actuated and to discharge the emissions from the housing. The exhaust pipe has at least one corner.

2. The battery device according to claim 1, wherein, The length of the exhaust pipe is L, which satisfies L≥0.5m.

3. The battery device according to claim 2, wherein, 2m≤L≤20m.

4. The battery device according to any one of claims 1-3, wherein, The number of corners is M, where M ≥ 4.

5. The battery device according to any one of claims 1-4, wherein, The air inlet of the exhaust pipe is connected to the first accommodating cavity, and the exhaust outlet of the exhaust pipe is connected to the outside of the housing.

6. The battery device according to any one of claims 1-5, wherein, The exhaust pipe forms an exhaust channel inside, and the minimum cross-sectional area of ​​the exhaust channel is W, which satisfies 50mm. 2 ≤W≤1000mm 2 .

7. The battery device according to claim 6, wherein, 200mm 2 ≤W≤500mm 2 。 8. The battery device according to any one of claims 1-7, wherein, The exhaust pipe has at least one enlarged section.

9. The battery device according to any one of claims 1-8, wherein, The exhaust pipe includes a plurality of pipe segments arranged sequentially along its extension direction, and the melting point of the plurality of pipe segments decreases sequentially from the air inlet end of the exhaust pipe to the air outlet end of the exhaust pipe.

10. The battery device according to any one of claims 1-9, wherein, The melting point of the exhaust pipe is greater than or equal to 80°C.

11. The battery device according to any one of claims 1-10, wherein, The thickness of the wall of the box is less than or equal to 10 mm.

12. The battery device according to any one of claims 1-11, wherein, The housing includes side walls and a bottom wall, the side walls surrounding the bottom wall, the bottom wall supporting the battery cell assembly, and the exhaust pipe arranged circumferentially along the side walls.

13. The battery device according to claim 12, wherein, The exhaust pipe is arranged in a spiral shape along the circumference of the sidewall.

14. The battery device according to claim 13, wherein, The sidewall includes multiple sub-sidewalls connected end to end, and the portions of the exhaust pipe located on two adjacent sub-sidewalls are connected through the corner.

15. The battery device according to claim 14, wherein, The exhaust pipe includes multiple pipe segments. Along the extension direction of the exhaust pipe, two adjacent pipe segments are respectively connected to two adjacent sub-side walls, and a corner is formed between two adjacent pipe segments.

16. The battery device according to any one of claims 1-11, wherein, The exhaust pipe includes a plurality of first pipe segments and at least one second pipe segment. Along the extension direction of the exhaust pipe, the first pipe segments and the second pipe segments are alternately arranged. The plurality of first pipe segments are parallel to each other and spaced apart. The corner is formed between the first pipe segment and the second pipe segment.

17. The battery device according to claim 16, wherein, The length of the first pipe segment is greater than the length of the second pipe segment.

18. The battery device according to claim 16 or 17, wherein, The housing includes a side wall and a bottom wall. The bottom wall supports the battery cell assembly. The side wall surrounds the bottom wall. The first pipe segment and the second pipe segment are disposed on the side wall.

19. The battery device according to claim 18, wherein, The extension direction of the first pipe segment intersects the thickness direction of the bottom wall; or, The extension direction of the first pipe segment is parallel to the thickness direction of the bottom wall.

20. The battery device according to any one of claims 1-19, wherein, The exhaust pipe is located inside the housing.

21. The battery device according to any one of claims 1-19, wherein, The exhaust pipe is located outside the housing.

22. The battery device according to claim 21, wherein, The battery device further includes a protective component located outside the housing and connected to the housing, the protective component and the housing forming a second receiving cavity, and at least a portion of the exhaust pipe is disposed within the second receiving cavity.

23. An electrical device comprising a battery device as claimed in any one of claims 1-22, the battery device being used to provide electrical energy.

Images