Battery device and electric device

Abstract

This application provides a battery device and an electrical device that can improve the performance of the battery device. The battery device is applied to hybrid or range-extended vehicles. The battery device includes: a housing, individual battery cells, a pressure relief component, and an exhaust pipe. The housing includes a first receiving space and a first housing wall, with the individual battery cells housed in the first receiving space. The pressure relief component is disposed on the first housing wall. The exhaust pipe is connected to the surface of the first housing wall away from the first receiving space. A second receiving space is formed inside the exhaust pipe, and the second receiving space communicates with the first receiving space through the pressure relief component. The exhaust pipe includes a first opening and a second opening at both ends along its extension direction. The first opening communicates with the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the individual battery cells, the emissions from the individual battery cells are discharged to the outside of the battery device through the pressure relief component and the second opening.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and hybrid or range-extended vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of this sustainable development. For hybrid or range-extended vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, in addition to improving the electrical performance of battery devices, safety is also an issue that cannot be ignored. If the safety of a battery device cannot be guaranteed, then the device cannot be used, thus reducing its performance. Therefore, how to improve the performance of battery devices has become a pressing technical problem to be solved in this field. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the performance of the battery device.

[0005] In a first aspect, a battery device is provided for use in a hybrid or range-extended vehicle. The battery device includes: a housing including a first receiving space and a first housing wall; a battery cell housed in the first receiving space; a pressure relief component disposed on the first housing wall; and an exhaust pipe connected to a surface of the first housing wall away from the first receiving space. The exhaust pipe encloses a second receiving space, which is connected to the first receiving space via the pressure relief component. The exhaust pipe includes a first opening and a second opening at both ends along the extension direction of the exhaust pipe. The first opening is connected to the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell, the emissions from the battery cell are discharged to the outside of the battery device via the pressure relief component and the second opening.

[0006] In this embodiment, the battery device is configured for use in hybrid or range-extended vehicles. The battery device includes a housing, individual battery cells, a pressure relief component, and an exhaust pipe. The exhaust pipe is connected to the surface of the first housing wall away from the first accommodating space. A second accommodating space is formed inside the exhaust pipe, and this second accommodating space communicates with the first accommodating space via the pressure relief component. The exhaust pipe includes a first opening and a second opening at both ends along its extension direction. Since the first opening is configured to communicate with the engine of the hybrid or range-extended vehicle, in the event of thermal runaway of the individual battery cells, the emissions from the individual battery cells can enter the second accommodating space via the pressure relief component, thus reusing the exhaust passage of the engine of the hybrid or range-extended vehicle. This allows the high-temperature gas discharged through the pressure relief component to be combusted in the exhaust pipe, and the treated gas is discharged to the outside of the battery device through the second opening. This effectively reduces the impact of the emissions on other components outside the battery device, thereby improving the performance of the battery device.

[0007] In some embodiments, the pressure relief component is a one-way valve, which opens when the pressure in the first accommodating space is greater than the pressure in the second accommodating space, and the difference between the pressure in the first accommodating space and the pressure in the second accommodating space is greater than a first threshold.

[0008] In this embodiment, by setting the pressure relief component as a one-way valve, when the pressure in the first accommodating space is greater than the pressure in the second accommodating space, and the difference between the pressure in the first accommodating space and the pressure in the second accommodating space is greater than a first threshold, the one-way valve is set to open, thereby reducing the risk of emissions generated by the engine of the hybrid or range-extended vehicle entering the first accommodating space of the housing through the pressure relief component, thereby improving the performance of the battery device.

[0009] In some embodiments, the check valve is a venturi valve or a multi-hole jet valve.

[0010] In this embodiment, by setting the one-way valve as a venturi valve or a multi-hole jet valve, the emissions generated by the battery cell can be quickly discharged into the exhaust pipe through the one-way valve in the event of thermal runaway of the battery cell, thereby improving the emission efficiency of the battery cell's emissions. At the same time, the contact area between the emissions and the inner wall of the exhaust pipe is increased to facilitate the combustion treatment of the high-temperature emissions, thereby improving the performance of the battery device.

[0011] In some embodiments, the size of the exhaust pipe is greater than or equal to the size of the first housing wall along the extension direction of the exhaust pipe.

[0012] In this embodiment, along the extension direction of the exhaust pipe, the size of the exhaust pipe is set to be greater than or equal to the size of the first housing wall to facilitate the assembly between the housing and the exhaust pipe, and to facilitate the connection between the exhaust pipe and the engine of the hybrid or range-extended vehicle, thereby improving the assembly performance of the battery device.

[0013] In some embodiments, the battery device further includes a three-way catalytic component connected to the side of the second opening away from the first opening and communicating with the second receiving space.

[0014] In this embodiment, the battery device is configured to include a three-way catalytic converter connected to the side of the second opening away from the first opening and communicating with the second accommodating space. The high-temperature exhaust gas generated by the battery cell can first be combusted inside the exhaust pipe, and then the high-temperature gas after combustion can be catalytically purified by the three-way catalytic converter. At the same time, the three-way catalytic converter can also catalytically purify the exhaust gas generated by the engine of the hybrid or range-extended vehicle, thereby reducing pollution to the external environment of the battery device and improving the performance of the battery device.

[0015] In some embodiments, the battery device further includes a temperature sensor for monitoring the temperature in the exhaust pipe.

[0016] In this embodiment, the battery device is configured to include a temperature sensor for monitoring the temperature in the exhaust pipe, ensuring that the temperature in the exhaust pipe meets usage requirements. In the event of thermal runaway of a battery cell, the emissions from that battery cell can enter the second containment space through the pressure relief component, allowing the high-temperature gas discharged through the pressure relief component to undergo effective combustion in the exhaust pipe. This effectively reduces the impact of the emissions on other components outside the battery device, thereby improving the performance of the battery device.

[0017] In some embodiments, if the temperature sensor detects that the temperature in the exhaust pipe is below a second threshold, the engine in the hybrid or range-extended vehicle exhausts gas into the exhaust pipe so that the temperature in the exhaust pipe is greater than or equal to the second threshold.

[0018] In this embodiment, when the temperature sensor detects that the temperature in the exhaust pipe is lower than the second threshold, the engine in the hybrid or range-extended vehicle is controlled to exhaust gas into the exhaust pipe so that the temperature in the exhaust pipe is greater than or equal to the second threshold. In the event of thermal runaway of a battery cell, the emissions from the battery cell can enter the second containment space through the pressure relief component, so that the high-temperature gas discharged through the pressure relief component can be effectively combusted in the exhaust pipe, while reducing the impact of the emissions on other components outside the battery device, thereby improving the performance of the battery device.

[0019] In some embodiments, the temperature A1 in the exhaust pipe satisfies: 600℃≤A1≤1000℃.

[0020] In this embodiment of the application, by setting the temperature A1 in the exhaust pipe to satisfy: 600℃≤A1≤1000℃, in the event of thermal runaway of a battery cell, the emissions from the battery cell can enter the second containment space through the pressure relief component, so that the high-temperature gas discharged through the pressure relief component can be effectively combusted in the exhaust pipe, while reducing the impact of the emissions on other components outside the battery device, thereby improving the performance of the battery device.

[0021] In some embodiments, the housing and the exhaust pipe are integrally stamped.

[0022] In this embodiment, by setting the housing and the exhaust pipe to be integrally stamped, the structural strength between the housing and the exhaust pipe is improved, and the processing and manufacturing efficiency of the battery device is improved, thereby improving the performance of the battery device.

[0023] In some embodiments, the housing is welded or bolted to the exhaust pipe.

[0024] In this embodiment of the application, by setting the connection between the housing and the exhaust pipe as a welded connection, the connection strength between the housing and the exhaust pipe is effectively improved, while reducing processing and manufacturing costs. Secondly, by setting the connection between the housing and the exhaust pipe as a bolted connection, that is, by setting the connection between the housing and the exhaust pipe as a detachable connection, the assembly performance between the housing and the exhaust pipe is improved, thereby improving the performance of the battery device.

[0025] In a second aspect, an electrical device is provided, including the battery device described in the first aspect, the battery device being used to provide electrical energy to the electrical device.

[0026] In some implementations, the electrical device can be a vehicle, ship, or spacecraft. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application.

[0030] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application.

[0031] Figure 4 This is an exploded structural diagram of a battery cell provided in another embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the assembled housing and exhaust pipe provided in one embodiment of this application.

[0033] Figure 6 This is a cross-sectional schematic diagram of the assembled housing and exhaust pipe provided in one embodiment of this application.

[0034] Figure 7 This is a cross-sectional schematic diagram of the assembled housing and exhaust pipe provided in another embodiment of this application.

[0035] Figure 8 This is a cross-sectional schematic diagram of the assembled housing and exhaust pipe provided in another embodiment of this application.

[0036] Figure 9 This is a schematic diagram of the structure of the housing and exhaust pipe after assembly according to another embodiment of this application.

[0037] Figure 10 This is a schematic diagram of the structure of the housing and exhaust pipe after assembly according to another embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1-Vehicle; 10-Battery unit; 20-Battery cell; 30-Controller; 40-Motor; 11-Housing housing; 111-First part; 112-Second part; 112a-Base plate; 112b-Side plate; 21-Outer shell; 22-Electrode assembly; 211-Housing shell; 212-End cap; 222-Electrode tab; 222a-Positive electrode tab; 222b-Negative electrode tab; 213-Pressure relief mechanism; 214-Electrode terminal; 214a-First electrode terminal; 214b-Second electrode terminal; 215-Supporting component; 23-Connecting component; 50-Receiving cavity; 60-First receiving space; 70-First housing wall; 80-Pressure relief component; 90-Exhaust pipe; 910-First opening; 920-Second opening; 930-Second receiving space; 100-Three-way catalytic converter component; 200-Temperature sensor.

[0039] The accompanying drawings are not drawn to scale. Detailed Implementation

[0040] 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 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0046] 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).

[0047] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0048] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0049] The battery cell in this application embodiment can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. For example, the battery cell can be a 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.

[0050] The electrode assembly in this embodiment includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. 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, disposed between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0051] 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.

[0052] 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.

[0053] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. 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 alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0054] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or a foamed alloy, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0055] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0056] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0057] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0058] As an example, 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.

[0059] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. 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 battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0060] In some embodiments, the negative electrode can be made of foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or a foamed alloy, etc. When foamed metal is used as the negative electrode, the surface of the foamed metal may or may not contain a negative electrode active material.

[0061] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0062] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0063] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0064] 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.

[0065] 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 single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0066] 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.

[0067] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0068] Liquid electrolytes include electrolyte salts and solvents.

[0069] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0070] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0071] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0072] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0073] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0074] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0075] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0076] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0077] In some implementations, the electrode assembly is a stacked structure.

[0078] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0079] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0080] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0081] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0082] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0083] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0084] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0085] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0086] 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. This application does not have any particular limitations.

[0087] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0088] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0089] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0090] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0091] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0092] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0093] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0094] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0095] 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.

[0096] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0097] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0098] 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.

[0099] 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.

[0100] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0101] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0102] 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.

[0103] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0104] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0105] Currently, energy conservation and emission reduction are key to the sustainable development of the automotive industry, and hybrid or range-extended vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of this sustainable development. For hybrid or range-extended vehicles, battery technology is a crucial factor in their development. In the development of battery technology, besides improving the electrical performance of the battery device, safety is also a significant concern. For example, in the event of thermal runaway, the exhaust gases can be promptly discharged to the outside of the battery device through a pressure relief mechanism on the battery casing. However, the discharged high-temperature exhaust gases may accumulate in other areas of the electrical system, causing thermal effects on other components and thus reducing the performance of both the battery device and the electrical system. For instance, high-temperature exhaust gases discharged through the battery device's pressure relief mechanism tend to accumulate in enclosed spaces such as the battery casing and vehicle chassis. Contact with high-temperature components such as brake discs or motors, as well as sparks, could potentially lead to combustion or explosion at the bottom of the vehicle. If the safety of the battery device cannot be guaranteed, it becomes unusable, reducing its performance. Therefore, improving the performance of battery devices has become a pressing technical problem in this field.

[0106] Therefore, this application provides a battery device and an electrical device. The battery device is applied to a hybrid or range-extended vehicle. The battery device includes a housing, a battery cell, a pressure relief component, and an exhaust pipe. The housing includes a first receiving space and a first housing wall. The battery cell is received in the first receiving space. The pressure relief component is disposed in the first housing wall. The exhaust pipe is connected to the surface of the first housing wall away from the first receiving space. A second receiving space is formed inside the exhaust pipe. The second receiving space is connected to the first receiving space through the pressure relief component. The exhaust pipe includes a first opening and a second opening at both ends along the extension direction of the exhaust pipe. The first opening is connected to the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell, the emissions from the battery cell are discharged to the outside of the battery device through the pressure relief component and the second opening. Thus, in this embodiment, by configuring the battery device for use in a hybrid or range-extended vehicle, the battery device includes a housing, battery cells, a pressure relief component, and an exhaust pipe. The exhaust pipe is connected to the surface of the first housing wall away from the first accommodating space. A second accommodating space is formed inside the exhaust pipe, and the second accommodating space is connected to the first accommodating space through the pressure relief component. The exhaust pipe includes a first opening and a second opening at both ends along the extension direction of the exhaust pipe. Since the first opening is configured to connect to the engine of the hybrid or range-extended vehicle, in the event of thermal runaway of the battery cell, the emissions from the battery cell can enter the second accommodating space through the pressure relief component, thereby reusing the exhaust passage of the engine of the hybrid or range-extended vehicle. This allows the high-temperature gas discharged through the pressure relief component to be combusted in the exhaust pipe, and the treated gas is discharged to the outside of the battery device through the second opening. This effectively reduces the impact of the emissions on other components outside the battery device, thereby improving the performance of the battery device.

[0107] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0108] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be hybrid cars or range-extended cars, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0109] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical devices described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments will be described in detail using a vehicle as an example of an electrical device.

[0110] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be hybrid vehicles or range-extended vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation of vehicle 1. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0111] To meet different power demands, the battery device 10 in this embodiment may include at least one battery cell assembly, which comprises multiple battery cells. These multiple battery cells can be electrically connected in series, parallel, or a combination thereof to form the battery device 10. A combination of series and parallel connections is used. The battery device 10 may also be referred to as a battery pack. For example, multiple battery cells can first be connected in series, parallel, or a combination to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination thereof to form the battery device 10. That is, multiple battery cells can directly form the battery device 10, or they can first be assembled into battery modules, and then the battery modules can be assembled into the battery device 10.

[0112] For example, such as Figure 2 The diagram shown is a structural schematic of a battery device 10 according to an embodiment of this application. The battery device 10 may include multiple battery cells 20. The battery device 10 may also include a housing 11 (or cover), which has a hollow interior structure, and the multiple battery cells 20 are housed within the housing 11. For example, the multiple battery cells 20 may be connected in parallel, series, or a mixed configuration and then placed inside the housing 11.

[0113] like Figure 2 As shown, the housing 11 may include two parts, referred to here as the first part 111 and the second part 112, which are fastened together. The shapes of the first part 111 and the second part 112 can be determined according to the combined shape of multiple battery cells 20. Both the first part 111 and the second part 112 may have an opening. For example, both the first part 111 and the second part 112 may be hollow cuboids with only one open face. The openings of the first part 111 and the second part 112 are opposite to each other, and the first part 111 and the second part 112 are fastened together to form a housing 11 with a closed cavity. The housing may include a bottom plate 112a, side plates 112b, and beams. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed inside the housing 11 formed by the fastening of the first part 111 and the second part 112.

[0114] Optionally, the battery device 10 may also include other structures, which will not be described in detail here. For example, the battery device 10 may also include a busbar component for realizing the electrical connection between multiple battery cells 20, such as parallel, series, or mixed connection. Specifically, the busbar component can realize the electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the housing by a conductive mechanism. Optionally, the conductive mechanism may also be part of the busbar component.

[0115] The number of battery cells 20 can be set to any value depending on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is unlimited and can be set according to requirements.

[0116] In this embodiment, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. The battery device 10 may include multiple battery modules, which can be connected in series, parallel, or mixed connection.

[0117] Figure 3 This diagram shows an exploded view of the battery cell 20 provided in one embodiment of the present application. Figure 4 An exploded structural diagram of a battery cell 20 according to another embodiment of this application is shown. Figure 3 and Figure 4 As shown, the battery cell 20 in this embodiment may include: a housing 21 and an electrode assembly 22. The housing 21 has a closed receiving cavity 50, and the electrode assembly 22 is placed in the receiving cavity 50 within the housing 21. The housing 21 may include a shell 211 and an end cap 212. The shell 211 is a hollow structure with at least one opening; the end cap 212 is used to fasten with the shell 211 to form the housing 21 with the closed receiving cavity 50.

[0118] In some embodiments, the end cap 212 may be a plate-like structure used to cover the opening of the housing 211. In other embodiments, the end cap 212 has a similar structure to the housing 211, that is, both the housing 211 and the end cap 212 are hollow structures with one opening, and the two openings are joined together to form an outer shell 21 with a closed accommodating space.

[0119] It should be understood that if the end cap 212 is a plate-like structure, the shell 211 can be a hollow structure with an opening at one or more ends. For example, if the shell 211 is a hollow structure with an opening at one end, the end cap 212 can be set as one; if the shell 211 is a hollow structure with openings at opposite ends, the end cap 212 can be set as two, with the two end caps 212 respectively covering the openings at both ends of the shell 211.

[0120] The outer shell 21 can be of various shapes, such as a cylinder, a cuboid, or other polyhedrons. For example, ... Figure 3 and Figure 4 As shown in the embodiments of this application, the description mainly takes the outer shell 21 as a cuboid structure.

[0121] It should be understood that the end cap 212 in this embodiment is used to cooperate with the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 can be adapted to the shape of the housing 211, such as... Figure 3 and Figure 4 As shown, the shell 211 has a cuboid structure, and the end cap 212 has a rectangular plate structure that is adapted to the shell 211.

[0122] The material of the housing 211 in this embodiment may include one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 212 may also be one or more materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 212 may be the same as or different from that of the housing 211; the materials of the different walls of the housing 211 may also be the same or different.

[0123] The end cap 212 in this embodiment can be any wall of the outer shell 21. For example, the end cap 212 can be the wall with the largest area among the multiple walls included in the outer shell 21, or the wall with the smallest area, or it can be other walls. This embodiment is not limited to this. Alternatively, the end cap 212 can also be other structures. For example, the end cap 212 can also be a groove with an opening to cover the opening of the housing 211. This embodiment is not limited to this.

[0124] It should be understood that the battery cell 20 also includes electrode terminals 214. In this embodiment, the electrode terminals 214 are used for electrical connection with the electrode assembly 22 inside the battery cell 20 to output the electrical energy of the battery cell 20. Figure 3 and Figure 4 As shown, the battery cell 20 may include at least two electrode terminals 214, which may include at least one first electrode terminal 214a and at least one second electrode terminal 214b. Exemplarily, if the first electrode terminal 214a is a positive electrode terminal, it is used for electrical connection to the positive electrode tab 222a of the electrode assembly 22; if the second electrode terminal 214b is a negative electrode terminal, it is used for electrical connection to the negative electrode tab 222b of the electrode assembly 22. The first electrode terminal 214a and the positive electrode tab 222a can be directly connected or indirectly connected, as can the second electrode terminal 214b and the negative electrode tab 222b. Exemplarily, the first electrode terminal 214a can be electrically connected to the positive electrode tab 222a via an adapter 23, and the second electrode terminal 214b can be electrically connected to the negative electrode tab 222b via an adapter 23. It should be understood that in the embodiments of this application, the positive electrode tab 222a and the negative electrode tab 222b can be collectively referred to as electrode tab 222.

[0125] In this embodiment, the wall of the housing 211 and the wall of the end cap 212 are both referred to as the wall of the battery cell 20. Figure 3 and Figure 4 The rectangular battery cell 20 shown has a housing 211 with a bottom wall and four side walls. The housing 211 is shaped according to the combination of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one face of the housing 211 has an opening to allow one or more electrode assemblies 22 to be placed inside. For example, when the housing 211 is a hollow cuboid or cube, one plane of the housing 211 is an open face, meaning that this plane has no wall, allowing communication between the inside and outside of the housing 211. When the housing 211 is a hollow cylinder, the end face of the housing 211 is an open face, meaning that this end face has no wall, allowing communication between the inside and outside of the housing 211. An end cap 212 covers the opening and connects to the housing 211 to form a closed cavity for placing the electrode assemblies 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0126] In this battery cell 20, the electrode assembly 22 is the component in which the electrochemical reaction occurs. Depending on actual usage requirements, the electrode assembly 22 within the casing 211 can be one or multiple. For example, as... Figure 4 As shown, two electrode assemblies 22 are disposed within the battery cell 20. The electrode assembly 22 can be a cylinder, a cuboid, etc. If the electrode assembly 22 is a cylindrical structure, the housing 211 can also be a cylindrical structure; if the electrode assembly 22 is a cuboid structure, the housing 211 can also be a cuboid structure. In this embodiment, the material of the housing 211 may include the following materials: copper, iron, aluminum, steel, aluminum alloy, etc.

[0127] In some implementations, a support member 215 may also be provided in the battery cell 20. The support member 215 may be fixed between the electrode assembly 22 and the wall of the housing 211 facing the electrode assembly 22, so as to form an exhaust channel communicating with the pressure relief mechanism 213 between the support member and the wall of the housing 211 facing the electrode assembly 22. In the event that the battery cell 20 is subjected to external impact, the support member 215 can reduce the risk that the impact of the electrode assembly 22 on the pressure relief mechanism 213 will cause the pressure relief mechanism 213 to be actuated prematurely.

[0128] In some implementations, an insulating element may also be provided in the battery cell 20. The insulating element is disposed in the accommodating space of the housing 211, and the insulating element may be a hollow structure with one or more openings. The accommodating space in the hollow structure is used to accommodate the electrode assembly 22 to improve the insulation performance of the battery cell 20.

[0129] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold.

[0130] The pressure relief mechanism 213 can be any of the possible pressure relief mechanisms 213. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell 20 with the pressure relief mechanism 213 reaches a threshold.

[0131] Figure 5 This paper shows a schematic diagram of the structure of the housing 11 and the exhaust pipe 90 after assembly according to an embodiment of this application. Figure 6 A cross-sectional schematic diagram of the housing 11 and the exhaust pipe 90 provided in one embodiment of this application is shown. Figure 7 A cross-sectional schematic diagram of the housing 11 and the exhaust pipe 90 after assembly is shown in another embodiment of this application. Figure 8 A cross-sectional schematic diagram of the housing 11 and exhaust pipe 90 after assembly is shown according to another embodiment of this application. Exemplarily, Figure 6 Can be Figure 5 The diagram shows a cross-sectional view along the AA direction of the assembled structure of the housing 11 and exhaust pipe 90. Alternatively, Figure 7 Can be Figure 5 The diagram shows a cross-sectional view along the AA direction of the assembled structure of the housing 11 and exhaust pipe 90. Alternatively, Figure 8 Can be Figure 5 The diagram shows a cross-sectional view of the assembled structure of the housing 11 and the exhaust pipe 90 along the AA direction.

[0132] In some implementations, such as Figures 5 to 8As shown, the battery device 10 is used in hybrid or range-extended vehicles. The battery device 10 includes: a housing 11, battery cells 20, a pressure relief component 80, and an exhaust pipe 90. The housing 11 includes a first receiving space 60 and a first housing wall 70. The battery cells 20 are received in the first receiving space 60. The pressure relief component 80 is disposed in the first housing wall 70. The exhaust pipe 90 is connected to the surface of the first housing wall 70 away from the first receiving space 60. A second [missing information] is formed inside the exhaust pipe 90. The second accommodating space 930 is connected to the first accommodating space 60 through the pressure relief component 80. The exhaust pipe 90 includes a first opening 910 and a second opening 920 at both ends along the extension direction of the exhaust pipe 90. The first opening 910 is connected to the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 are discharged to the outside of the battery device 10 through the pressure relief component 80 and the second opening 920.

[0133] It should be understood that, for ease of description, three directions can be defined in this embodiment: direction X, direction Y, and direction Z. Direction X can be the length direction of the housing 11, or the extension direction of the exhaust pipe 90; direction Y can be the width direction of the housing 11, and direction Y is perpendicular to direction X; direction Z can be the height direction of the housing 11, and direction Z is perpendicular to both direction X and direction Y. For example, the extension direction of the exhaust pipe 90 in this embodiment can be direction X.

[0134] It should also be understood that the first enclosure wall 70 in this embodiment can be any wall on the enclosure 11 of the battery device 10. For example, the first enclosure wall 70 can be the bottom plate 112a or the side plate 112b of the enclosure 11. Specifically, when the first enclosure wall 70 is set as the side plate 112b of the enclosure 11, the pressure relief component 80 can be disposed on the side plate 112b so that in the event of thermal runaway of the battery cell 20, the emissions generated by the battery cell 20 can be discharged into the exhaust pipe 90 through the pressure relief component 80, and the high-temperature gas generated by the battery cell 20 can be combusted in the high-temperature environment within the exhaust pipe 90.

[0135] It should also be understood that the number of pressure relief components 80 in the embodiments of this application can be set according to actual needs. For example, when the first housing wall 70 is set as the side plate 112b of the housing 11, the number of pressure relief components 80 provided on the side plate 112b can be set to one or more.

[0136] It should also be understood that, in the embodiments of this application, the connection of the exhaust pipe 90 to the surface of the first housing wall 70 away from the first receiving space 60 can mean that the exhaust pipe 90 can be integrally formed with the housing 11 or separately formed. When the exhaust pipe 90 can be separately formed with the housing 11, the exhaust pipe 90 can be fixedly connected or detachably connected to the surface of the first housing wall 70 away from the first receiving space 60. For example, the exhaust pipe 90 can be welded or bolted to the surface of the first housing wall 70 away from the first receiving space 60.

[0137] It should also be understood that the second accommodating space 930 in this embodiment can be an accommodating space with openings at both ends, that is, the openings at both ends can be a first opening 910 and a second opening 920 provided at both ends of the exhaust pipe 90 along the extension direction of the exhaust pipe 90. On the projection plane perpendicular to the X direction, the shapes of the first opening 910 and the second opening 920 can be set according to actual needs. For example, the shapes of the first opening 910 and the second opening 920 on the projection plane perpendicular to the X direction can be set as rounded rectangles, circles, or regular hexagons. It should also be understood that the shapes of the first opening 910 and the second opening 920 on the projection plane perpendicular to the X direction can be the same or different. As an example, this embodiment does not limit this.

[0138] It should also be understood that the first opening 910 is connected to the engine of the hybrid or range-extended vehicle. This means that the engine of the hybrid or range-extended vehicle can be connected to the first opening 910 through a pipeline, so that the exhaust gas generated by the engine can provide a high-temperature, oxygen-rich, and turbulent environment for the exhaust pipe 90. In the event of thermal runaway of the battery cell 20, the emissions of the battery cell 20 can enter the second receiving space 930 through the pressure relief component 80, so as to reuse the exhaust passage of the engine of the hybrid or range-extended vehicle. This allows the high-temperature gases discharged through the pressure relief component 80, such as hydrogen, carbon monoxide, and hydrocarbons, to be effectively combusted in the exhaust pipe 90 without the need for additional ignition or the installation of ignition and combustion devices, thereby reducing the processing and manufacturing costs of the battery device 10.

[0139] It should also be understood that the outer and inner surfaces of the exhaust pipe 90 in this embodiment can be subjected to high-temperature spraying treatment to improve the high-temperature resistance, corrosion resistance, and fire resistance of the exhaust pipe 90. It should also be understood that the outer and inner surfaces of the housing 11 in this embodiment can also be subjected to high-temperature spraying treatment. Exemplarily, the material used for high-temperature spraying treatment can be one of the following: organic high-temperature resistant coatings, inorganic high-temperature resistant coatings, or ceramic materials.

[0140] Specifically, the battery device 10 in this embodiment is applied to a hybrid or range-extended vehicle. The engine of the hybrid or range-extended vehicle is connected to the first opening 910 of the exhaust pipe 90 so that the exhaust gas generated by the engine provides a high-temperature, oxygen-rich and turbulent environment for the exhaust pipe 90. In the event of thermal runaway of the battery cell 20, the emissions of the battery cell 20 can enter the second receiving space 930 through the pressure relief component 80 to reuse the exhaust passage of the engine of the hybrid or range-extended vehicle. This allows the high-temperature gas discharged through the pressure relief component 80 to be effectively combusted in the exhaust pipe 90, and the treated gas is discharged to the outside of the battery device 10 through the second opening 920.

[0141] In this embodiment, the battery device 10 is configured for use in hybrid or range-extended vehicles. The battery device 10 includes a housing 11, battery cells 20, a pressure relief component 80, and an exhaust pipe 90. The exhaust pipe 90 is connected to the surface of the first housing wall 70 away from the first receiving space 60. A second receiving space 930 is formed inside the exhaust pipe 90, and the second receiving space 930 communicates with the first receiving space 60 through the pressure relief component 80. The exhaust pipe 90 includes a first opening 910 and a second opening 920 at both ends along its extending direction. The opening 910 is configured to connect with the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 can enter the second receiving space 930 through the pressure relief component 80, thereby reusing the exhaust passage of the engine of the hybrid or range-extended vehicle. This allows the high-temperature gas discharged through the pressure relief component 80 to be combusted in the exhaust pipe 90, and the treated gas is discharged to the outside of the battery device 10 through the second opening 920. This effectively reduces the impact of the emissions on other components outside the battery device 10, thereby improving the performance of the battery device 10.

[0142] In some implementations, the pressure relief component 80 is a one-way valve, which opens when the pressure in the first accommodating space 60 is greater than the pressure in the second accommodating space 930, and the difference between the pressure in the first accommodating space 60 and the pressure in the second accommodating space 930 is greater than a first threshold.

[0143] It should be understood that the first threshold in the embodiments of this application can be set according to actual needs, so that when the difference between the pressure in the first accommodating space 60 and the pressure in the second accommodating space 930 is greater than the first threshold, the one-way valve is controlled to open, so that the emissions generated by the battery cell 20 are discharged into the exhaust pipe 90 and discharged to the outside of the battery device 10 through the second opening 920.

[0144] It should also be understood that the battery device 10 in this embodiment further includes a pressure sensor for monitoring the pressure in the first accommodating space 60 and the second accommodating space 930. The pressure sensor can also be electrically connected to the pressure relief component 80 and the battery management system. When the pressure sensor detects that the difference between the pressure in the first accommodating space 60 and the pressure in the second accommodating space 930 is greater than a first threshold, the battery management system can control the one-way valve to open so as to discharge the emissions generated by the battery cell 20 into the exhaust pipe 90, so that the high-temperature gas discharged through the pressure relief component 80 can be combusted in the exhaust pipe 90 and the treated gas is discharged to the outside of the battery device 10 through the second opening 920.

[0145] In this embodiment, by setting the pressure relief component 80 as a one-way valve, when the pressure in the first accommodating space 60 is greater than the pressure in the second accommodating space 930, and the difference between the pressure in the first accommodating space 60 and the pressure in the second accommodating space 930 is greater than a first threshold, the one-way valve is set to open, thereby reducing the risk that emissions generated by the engine of the hybrid or range-extended vehicle will enter the first accommodating space 60 of the housing 11 through the pressure relief component 80, thereby improving the performance of the battery device 10.

[0146] In some implementations, the one-way valve is a Venturi valve or a multi-hole jet valve. Thus, in this embodiment, by setting the one-way valve as a Venturi valve or a multi-hole jet valve, in the event of thermal runaway of the battery cell 20, the emissions generated by the battery cell 20 can be rapidly discharged into the exhaust pipe 90 through the one-way valve, improving the emission efficiency of the battery cell 20's emissions. Simultaneously, it increases the contact area between the emissions and the inner wall of the exhaust pipe 90, facilitating the combustion of the high-temperature emissions, thereby improving the performance of the battery device 10.

[0147] In some implementations, the size of the exhaust pipe 90 is greater than or equal to the size of the first housing wall 70 along the extension direction of the exhaust pipe 90.

[0148] It should be understood that, along the extension direction of the exhaust pipe 90, i.e., along direction X, the size of the exhaust pipe 90 can be set to be greater than or equal to the size of the first housing wall 70, so as to facilitate the assembly between the housing 11 and the exhaust pipe 90.

[0149] For example, along the extension direction of the exhaust pipe 90, the size of the exhaust pipe 90 can be set to be equal to the size of the first housing wall 70.

[0150] In this embodiment, along the extension direction of the exhaust pipe 90, the size of the exhaust pipe 90 is set to be greater than or equal to the size of the first housing wall 70, so as to facilitate the assembly between the housing 11 and the exhaust pipe 90, and to facilitate the connection between the exhaust pipe 90 and the engine of the hybrid or range-extended vehicle, thereby improving the assembly performance of the battery device 10.

[0151] Figure 9 A schematic diagram of the structure of the housing 11 and the exhaust pipe 90 after assembly is shown in another embodiment of this application.

[0152] In some implementations, such as Figure 9 As shown, the battery device 10 also includes a three-way catalytic converter 100, which is connected to the side of the second opening 920 away from the first opening 910 and communicates with the second receiving space 930.

[0153] It should be understood that the three-way catalytic converter 100 is connected to the side of the second opening 920 away from the first opening 910, which may mean that the air intake end of the three-way catalytic converter 100 can be bolted or welded to the second opening 920.

[0154] It should also be understood that the three-way catalytic converter 100 in this embodiment can catalyze and purify the gas discharged through the second opening 920. For example, the three-way catalytic converter 100 can catalyze and purify the emissions from the battery cell 20 after combustion, and the three-way catalytic converter 100 can also treat the exhaust gas generated by the engine. Exemplarily, the three-way catalytic converter 100 can catalyze and purify carbon monoxide, hydrocarbons, nitrogen oxides, etc. discharged through the second opening 920 to reduce pollution to the external environment of the battery device 10.

[0155] In this embodiment, the battery device 10 is configured to include a three-way catalytic converter 100. The three-way catalytic converter 100 is connected to the side of the second opening 920 away from the first opening 910 and communicates with the second accommodating space 930. The high-temperature exhaust gas generated by the battery cell 20 can first be combusted inside the exhaust pipe 90. Then, the high-temperature gas after combustion can be catalytically purified by the three-way catalytic converter 100. At the same time, the three-way catalytic converter 100 can also catalytically purify the exhaust gas generated by the engine of the hybrid or range-extended vehicle, thereby reducing the pollution of the external environment of the battery device 10 and improving the performance of the battery device 10.

[0156] Figure 10 A schematic diagram of the structure of the housing 11 and the exhaust pipe 90 after assembly is shown in another embodiment of this application.

[0157] In some implementations, such as Figure 10 As shown, the battery device 10 also includes a temperature sensor 200 for monitoring the temperature in the exhaust pipe 90.

[0158] It should be understood that the temperature sensor 200 in the embodiments of this application can be configured as a contact type or a non-contact type. When the temperature sensor 200 is configured as a contact temperature sensor, it can be configured as a thermocouple, a resistance temperature detector (RTD), a thermistor, or a bimetallic thermometer. When the temperature sensor 200 is configured as a non-contact temperature sensor, it can be configured as an infrared thermometer.

[0159] In this embodiment, by further including a temperature sensor 200, which monitors the temperature in the exhaust pipe 90, the temperature in the exhaust pipe 90 is made to meet the usage requirements. In the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 can enter the second accommodating space 930 through the pressure relief component 80, so that the high-temperature gas discharged through the pressure relief component 80 can be effectively combusted in the exhaust pipe 90, effectively reducing the impact of the emissions on other components outside the battery device 10, thereby improving the performance of the battery device 10.

[0160] In some implementations, when the temperature sensor 200 detects that the temperature in the exhaust pipe 90 is below a second threshold, the engine in the hybrid or range-extended vehicle exhausts gas into the exhaust pipe 90 so that the temperature in the exhaust pipe 90 is greater than or equal to the second threshold.

[0161] It should be understood that the second threshold in the embodiments of this application can be set according to actual needs. When the temperature in the exhaust pipe 90 is lower than the second threshold, the engine control unit in the hybrid or range-extended vehicle controls the engine to exhaust gas into the exhaust pipe 90 so that the temperature in the exhaust pipe 90 is greater than or equal to the second threshold. This provides a high-temperature, oxygen-rich, and turbulent environment for the exhaust pipe 90 through the exhaust gas generated by the engine, thereby enabling the high-temperature gas discharged through the pressure relief component 80 to undergo effective combustion in the exhaust pipe 90.

[0162] In this embodiment, when the temperature sensor 200 detects that the temperature in the exhaust pipe 90 is lower than the second threshold, the engine in the hybrid or range-extended vehicle is controlled to exhaust gas into the exhaust pipe 90 so that the temperature in the exhaust pipe 90 is greater than or equal to the second threshold. In the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 can enter the second accommodating space 930 through the pressure relief component 80, so that the high-temperature gas discharged through the pressure relief component 80 can be effectively combusted in the exhaust pipe 90, while reducing the impact of the emissions on other components outside the battery device 10, thereby improving the performance of the battery device 10.

[0163] In some implementations, the temperature A1 in the exhaust pipe 90 satisfies: 600℃≤A1≤1000℃.

[0164] For example, the temperature A1 in the exhaust pipe 90 can be set to: 600℃, 650℃, 700℃, 750℃, 800℃, 850℃, 900℃, 950℃, 1000℃, etc., or its value is within the range obtained by any combination of the above two values.

[0165] In this embodiment, by setting the temperature A1 in the exhaust pipe 90 to satisfy 600℃≤A1≤1000℃, in the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 can enter the second accommodating space 930 through the pressure relief component 80, so that the high-temperature gas discharged through the pressure relief component 80 can be effectively combusted in the exhaust pipe 90, while reducing the impact of the emissions on other components outside the battery device 10, thereby improving the performance of the battery device 10.

[0166] Specifically, during the use of the battery device 10, if the battery management system of the battery device 10 detects that the voltage, temperature, or gas production rate of the battery cell 20 reaches a preset threshold, indicating thermal runaway of the battery cell 20, the battery management system can send control signals to the pressure relief component 80 and the engine control unit of the hybrid or range-extended vehicle. On the one hand, it can control the pressure relief component 80 to open its one-way valve, allowing the emissions generated by the battery cell 20 to be discharged into the second receiving space 930 of the exhaust pipe 90 through the pressure relief component 80. On the other hand, it can control the engine control unit to control the engine's operating state so that the temperature in the second receiving space 930 of the exhaust pipe 90 meets the usage requirements. For example, when the temperature in the second receiving space 930 of the exhaust pipe 90 is low, the engine control unit can adjust the engine's operating state to a high-efficiency thermal management mode, that is, increase the engine's operating speed, thereby increasing the temperature in the second receiving space 930 of the exhaust pipe 90. The high-temperature emissions from the battery cell 20 discharged into the second containment space 930 via the pressure relief component 80 can be effectively combusted in the second containment space 930 and catalyzed and purified by the three-way catalytic component 100 connected through the second opening 920. The treated emissions are then discharged to the outside of the battery device 10.

[0167] In some implementations, the housing 11 and the exhaust pipe 90 are integrally stamped. Thus, in this embodiment, by setting the housing 11 and the exhaust pipe 90 to be integrally stamped, the structural strength between the housing 11 and the exhaust pipe 90 is improved, while the processing and manufacturing efficiency of the battery device 10 is increased, thereby improving the performance of the battery device 10.

[0168] In some implementations, the housing 11 and the exhaust pipe 90 are welded or bolted together. Thus, in this embodiment, by welding the housing 11 and the exhaust pipe 90, the connection strength between them is effectively improved, while reducing processing and manufacturing costs. Furthermore, by bolting the housing 11 and the exhaust pipe 90, making them detachable, the assembly performance between them is improved, thereby enhancing the usability of the battery device 10.

[0169] According to some embodiments of this application, this application also provides an electrical device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to provide electrical energy to the electrical device. Specifically, the electrical device can be... Figure 1The vehicle 1 shown can also be any electrical device that uses the battery device 10.

[0170] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0171] Based on some embodiments of this application, see again the above. Figures 5 to 10 As shown, a battery device 10 is provided, which is applied to a hybrid or range-extended vehicle. The battery device 10 includes: a housing 11, battery cells 20, a pressure relief component 80, and an exhaust pipe 90. The housing 11 includes a first receiving space 60 and a first housing wall 70. The battery cells 20 are received in the first receiving space 60. The pressure relief component 80 is disposed in the first housing wall 70. The exhaust pipe 90 is connected to the surface of the first housing wall 70 away from the first receiving space 60. The battery pack 10 has a second receiving space 930, which is connected to the first receiving space 60 via the pressure relief component 80. The exhaust pipe 90 includes a first opening 910 and a second opening 920 at both ends along its extension direction. The first opening 910 is connected to the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell 20, the emissions from the battery cell 20 are discharged to the outside of the battery pack 10 through the pressure relief component 80 and the second opening 920. The pressure relief component 80 is a one-way valve. The one-way valve opens when the pressure in the first receiving space 60 is greater than the pressure in the second receiving space 930, and the difference between the pressure in the first receiving space 60 and the pressure in the second receiving space 930 is greater than a first threshold. Along the extension direction of the exhaust pipe 90, the size of the exhaust pipe 90 is greater than or equal to the size of the first housing wall 70. The battery device 10 also includes a three-way catalytic converter 100, which is connected to the side of the second opening 920 away from the first opening 910 and communicates with the second receiving space 930. The battery device 10 also includes a temperature sensor 200 for monitoring the temperature in the exhaust pipe 90.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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, characterized by, Applied to hybrid or range-extended vehicles, the battery device includes: The box (11) includes a first receiving space (60) and a first box wall (70); A single battery cell (20) is housed in the first accommodating space (60); A pressure relief component (80) is disposed on the first housing wall (70); An exhaust pipe (90) is connected to the surface of the first housing wall (70) away from the first receiving space (60). A second receiving space (930) is formed inside the exhaust pipe (90). The second receiving space (930) is connected to the first receiving space (60) through the pressure relief component (80). The exhaust pipe (90) includes a first opening (910) and a second opening (920) at both ends along the extension direction of the exhaust pipe (90). The first opening (910) is connected to the engine of the hybrid or range-extended vehicle. In the event of thermal runaway of the battery cell (20), the emissions from the battery cell (20) are discharged to the outside of the battery device through the pressure relief component (80) and the second opening (920).

2. The battery device according to claim 1, characterized by The pressure relief component (80) is a one-way valve. When the pressure in the first accommodating space (60) is greater than the pressure in the second accommodating space (930), and the difference between the pressure in the first accommodating space (60) and the pressure in the second accommodating space (930) is greater than a first threshold, the one-way valve opens.

3. The battery device according to claim 2, characterized in that, The one-way valve is either a venturi valve or a multi-hole jet valve.

4. The battery device according to claim 1, characterized in that, Along the extension direction of the exhaust pipe (90), the size of the exhaust pipe (90) is greater than or equal to the size of the first housing wall (70).

5. The battery device according to claim 1, characterized in that, The battery device further includes a three-way catalytic component (100), which is connected to the side of the second opening (920) away from the first opening (910) and communicates with the second receiving space (930).

6. The battery device according to claim 1, characterized in that, The battery device also includes a temperature sensor (200) for monitoring the temperature in the exhaust pipe (90).

7. The battery device according to claim 6, characterized in that, If the temperature sensor (200) detects that the temperature in the exhaust pipe (90) is lower than the second threshold, the engine in the hybrid or range-extended vehicle exhausts gas into the exhaust pipe (90) so that the temperature in the exhaust pipe (90) is greater than or equal to the second threshold.

8. The battery device according to claim 1, characterized in that, The temperature A1 in the exhaust pipe (90) satisfies: 600℃≤A1≤1000℃.

9. The battery device according to any one of claims 1 to 8, characterized in that, The housing (11) and the exhaust pipe (90) are integrally stamped.

10. The battery device according to any one of claims 1 to 8, characterized in that, The housing (11) is welded or bolted to the exhaust pipe (90).

11. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 10, wherein the battery device is used to provide electrical energy to the electrical device.

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