Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and relates to the technical field of batteries. The battery device comprises a battery monomer, a box body and a pressure relief mechanism, wherein the box body is provided with an accommodating space for accommodating the battery monomer; the box body comprises a side wall and a bottom wall, the bottom wall is configured to support the battery single body, the side wall is arranged around the bottom wall in a surrounding manner, the pressure relief mechanism is arranged on the side wall, the pressure relief mechanism is provided with an exhaust passage for discharging emissions in the accommodating space, and the exhaust passage is arranged in a downward inclined manner. According to the battery device provided by the embodiment of the invention, the exhaust channel is arranged in a downward inclined manner, so that emissions discharged through the exhaust channel can be discharged in a downward inclined manner when the battery device is subjected to pressure relief, and the influence of the discharged emissions on the periphery of the battery device is reduced when the battery device is in some specific application scenes; and the use reliability of the battery device is improved.

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. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, the reliability of battery devices is a crucial issue. Poor reliability hinders the widespread adoption of such devices. Therefore, improving the reliability of battery devices is a long-term technical challenge that requires continuous consideration. Utility Model Content

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

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery cell, a housing, and a pressure relief mechanism. The housing has a receiving space for accommodating the battery cell. The housing includes a side wall and a bottom wall, the bottom wall being configured to support the battery cell, the side wall surrounding the bottom wall, and the pressure relief mechanism being disposed on the side wall. The pressure relief mechanism has an exhaust channel for discharging emissions from the receiving space, and the exhaust channel is inclined downwards.

[0007] In the above embodiments, the exhaust channel is angled downwards, allowing emissions to be discharged downwards when the battery device is depressurized. This reduces the impact of emissions on the surrounding environment in certain application scenarios, thereby improving the reliability of the battery device. For example, in automotive applications, the battery device is typically located at the bottom of the vehicle. When the exhaust channel is angled downwards, the gas discharged downwards is less likely to affect the surrounding environment, such as other vehicles or pedestrians, thus improving the reliability of the battery device.

[0008] In some embodiments, the sidewall includes a plurality of side beams connected end to end, at least one of the side beams being a load-bearing beam, and a pressure relief mechanism is disposed on the load-bearing beam.

[0009] In the above embodiments, the pressure relief mechanism is set on the mounting beam. While satisfying the requirement of better weight reduction of the battery device, the characteristics of the mounting beam can be directly utilized to set up a pressure relief mechanism with a downwardly inclined exhaust channel. Thus, while the battery device has a good weight reduction effect, the processing difficulty can also be taken into account.

[0010] In some embodiments, the mounting beam is provided with at least one cavity.

[0011] In the above embodiments, by providing cavities on the mounting beam, the weight of the battery device can be reduced, raw materials can be saved, the economic efficiency of the battery device can be improved, and the formed cavities can also absorb energy, reducing the impact of collisions on individual battery cells inside the box when the battery device is subjected to a collision.

[0012] In some embodiments, at least one cavity includes a first cavity, a pressure relief mechanism is disposed on the cavity wall of the first cavity, and the first cavity is configured to communicate a receiving space and an exhaust passage.

[0013] In the above embodiments, in the scenario where the mounting beam has a cavity, the pressure relief mechanism can be set based on the cavity wall of one of the cavities (the first cavity), which makes it easier to obtain a pressure relief mechanism with a downwardly inclined exhaust channel, and has the advantage of low processing difficulty.

[0014] In some embodiments, the cavity wall of the first cavity includes a first cavity wall located at the bottom of the first cavity, the first cavity wall is inclined upward, and the first cavity wall is provided with a mounting hole, on which the pressure relief mechanism is mounted.

[0015] In the above embodiments, the first cavity wall is inclined upwards, allowing for the direct provision of mounting holes perpendicular to the first cavity wall. This enables the exhaust channel of the pressure relief mechanism, mounted in the mounting hole, to be inclined downwards on the first cavity wall, reducing the manufacturing difficulty of the pressure relief mechanism. Furthermore, by placing the mounting hole on the first cavity wall at the bottom of the first cavity, and creating a downwardly inclined exhaust channel based on the first cavity wall, the emissions discharged from the battery device through the exhaust channel in specific application scenarios can be discharged downwards as much as possible, thereby reducing the impact of emissions on the surrounding area of ​​the battery device.

[0016] In some embodiments, the cavity wall of the first cavity includes a second cavity wall, which is a common wall of the receiving space and the first cavity. The second cavity wall is provided with a channel that connects the receiving space and the first cavity. The receiving space and the first cavity are arranged adjacent to each other, such that the second cavity wall is a common wall of the receiving space and the first cavity. The channel in the second cavity wall allows communication between the receiving space and the first cavity. When the pressure relief mechanism releases pressure, the discharge material in the housing passes through the receiving space, through the first cavity, and is discharged from the pressure relief mechanism provided on the cavity wall of the first cavity, thereby realizing the pressure relief action of the battery device.

[0017] In some embodiments, the bottom wall supports the battery cell along a first direction, and at least one cavity includes a second cavity. The first cavity and the second cavity are arranged along the first direction, and the second cavity is located on the side of the first cavity away from the bottom wall.

[0018] In the above embodiments, by arranging a first cavity and a second cavity along a first direction, and connecting the first cavity to the accommodating space and the exhaust channel, the emissions discharged when the battery device is depressurized are less dispersed as they pass through the mounting beam, allowing the emissions to be discharged from the depressurization mechanism more quickly and reducing the impact of the emissions on the battery device. Furthermore, the second cavity is located on the side of the first cavity away from the bottom wall, allowing the depressurization mechanism on the cavity wall of the first cavity to be positioned as close to the bottom as possible. In specific application scenarios, the depressurization mechanism is positioned close to the bottom and tilted downwards, ensuring that when the battery device is depressurized, the emissions discharged through the depressurization mechanism are discharged downwards and tilted downwards as much as possible, further reducing the impact on the environment surrounding the battery device.

[0019] In some embodiments, the cavity wall of the first cavity includes a first cavity wall located at the bottom of the first cavity, the first cavity wall being inclined upward; the cavity wall of the second cavity includes a third cavity wall located at the top of the second cavity, the third cavity wall being inclined downward.

[0020] In the above embodiment, the first cavity and the second cavity are arranged along a first direction, and the second cavity is located on the side of the first cavity away from the bottom wall. The first cavity wall at the bottom of the first cavity is the cavity wall away from the second cavity, and similarly, the third cavity wall at the top of the second cavity is also the cavity wall away from the first cavity. The first cavity wall is inclined upward, which can be understood as the first cavity wall gradually tilting upward towards the area where the second cavity is located along the direction away from the receiving space; similarly, the third cavity wall is inclined downward, which can be understood as the third cavity wall gradually tilting downward towards the area where the first cavity is located along the direction away from the receiving space. Through this arrangement, the first cavity wall and the third cavity wall can have a gradually converging structure, which can improve the overall strength of the mounting beam and improve the reliability of the mounting beam.

[0021] In some embodiments, the mounting beam includes a mounting portion located on the side of the first cavity and the second cavity away from the receiving space, and the first cavity wall and the third cavity wall are both connected to the mounting portion.

[0022] In the above embodiments, the mounting part is located on the side of the first cavity and the second cavity away from the accommodating space, which can reduce the possible mutual interference between the mounting part and the pressure relief mechanism.

[0023] In some embodiments, the cavity extends through the mounting beam along its extension direction.

[0024] In the above embodiment, the cavity penetrates the mounting beam, and openings are formed on opposite sides of the cavity's extension direction. This design enables the mounting beam to achieve better weight reduction, and the through-cavity design also simplifies the manufacturing process.

[0025] In some embodiments, openings are formed at both ends of the cavity along the extension direction of the mounting beam. Sealing elements are provided at both ends of the mounting beam to seal the openings formed at both ends of the cavity. This embodiment can provide sealing elements at the openings at both ends of the cavity to seal the openings, thereby reducing the impact of decreased sealing of the accommodating space caused by the cavity.

[0026] In some embodiments, the bottom wall supports the battery cell along a first direction. Multiple side beams include two mounting beams arranged opposite each other along a second direction. The housing also includes two expansion beams arranged opposite each other along a third direction, with each expansion beam connected to the two mounting beams at its two ends along the second direction, and the battery cell located between the two expansion beams. The first, second, and third directions are perpendicular to each other.

[0027] In the above embodiments, by setting an expansion beam, the protection performance of the individual battery cells can be improved, thereby improving the overall reliability of the battery device.

[0028] In some embodiments, the bottom wall supports the battery cell along a first direction X, and the angle between the extension direction of the exhaust channel and the first direction is α, where 20°≤α≤80°. This configuration allows emissions discharged through the exhaust channel to tilt downwards when the battery device depressurizes, thereby reducing the impact of the battery device on the surrounding environment in the event of thermal runaway.

[0029] In some embodiments, 30°≤α≤60°. This configuration allows emissions discharged through the venting channel to be discharged more downwards when the battery device is depressurized, thereby reducing the impact of the battery device on the surrounding environment in the event of thermal runaway.

[0030] In some embodiments, the bottom wall and the side wall are separately configured and connected. The separate configuration of the bottom wall and the side wall allows for independent manufacturing during the production process, thereby increasing manufacturing flexibility and ultimately improving the overall economic efficiency of the battery device.

[0031] In some embodiments, the housing further includes a top wall, which is disposed on the side of the side wall away from the bottom wall, and the top wall and the side wall are separately disposed but connected. This arrangement allows the bottom wall, side wall and top wall to be manufactured separately during the manufacturing process, thereby improving manufacturing flexibility and thus improving the overall economic efficiency of the battery device.

[0032] Secondly, embodiments of this application provide an electrical device, including the battery device provided in any one of the embodiments of the first aspect.

[0033] In some embodiments, the electrical device is a vehicle having a passenger compartment, and the battery device is located at the bottom of the passenger compartment.

[0034] 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

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0037] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0038] Figure 3 This is a schematic diagram of the connection structure between a battery cell and a busbar in some embodiments of this application;

[0039] Figure 4 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0040] Figure 5 This is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0041] Figure 6 This is a side view of the housing according to some embodiments of this application;

[0042] Figure 7 for Figure 6 AA section view;

[0043] Figure 8 for Figure 7 A magnified view of a portion at point A;

[0044] Figure 9 This is an exploded structural diagram of the housing and pressure relief mechanism in the battery device of some embodiments of this application;

[0045] Figure 10 for Figure 9 A magnified view of the area at point B;

[0046] Figure 11 This is a schematic diagram of the structure of a battery device according to other embodiments of this application;

[0047] Figure 12 This is an exploded view of the battery device according to other embodiments of this application;

[0048] Figure 13 This is an exploded view of the battery device according to other embodiments of this application.

[0049] icon:

[0050] 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor; 10 - Housing; 11 - First housing; 12 - Second housing; 20 - Battery cell; 201 - Electrode terminal; 202 - Housing; 2021 - Shell; 2022 - End cap; 101 - Accommodation space; 102 - Side wall; 1021 - Mounting beam; 10211 - Cavity; 102111 - First cavity; 102112 - Second cavity; 10212 - First cavity wall; 102121 - Mounting hole; 10213 - Second cavity wall; 102131 - Channel; 10214 - Third cavity wall; 10215 - Mounting part; 10216 - Sealing component; 103 - Bottom wall; 104 - Expansion beam; 105 - Top wall; 30 - Pressure relief mechanism; 301 - Exhaust passage;

[0051] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] In this application, the reference to "embodiment" means that a particular 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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In this application, "multiple" means two or more (including two).

[0059] 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.

[0060] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0061] 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, reduces the risk of short circuits while allowing active ions to pass through.

[0062] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0063] 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.

[0064] 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 aluminum with a silver-plated surface, stainless steel with a silver-plated surface, copper, aluminum, nickel, carbon electrodes, carbon, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors 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.).

[0065] 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 in battery cells may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM)622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.85 Co 0.15 Al 0.05 At least one of O2 and its modified compounds.

[0066] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, 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, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0067] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0068] As an example, the negative electrode current collector can be a metal foil, a foamed metal, 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, copper, aluminum, nickel, carbon electrodes, carbon, or titanium, etc. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper 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.).

[0069] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0070] 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.

[0071] 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 in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0072] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0073] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.

[0074] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0075] 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.

[0076] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0077] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0078] In some embodiments, the solvent may include at least one selected from ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more selected from ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0079] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0080] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0081] As an example, polymer solid electrolytes can be polyether (polyoxyethylene), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0082] As an example, inorganic solid electrolytes may include 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 phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0083] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0084] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0085] In some implementations, the electrode assembly is a stacked structure.

[0086] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0087] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0088] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0089] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0090] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0091] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0092] 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.

[0093] 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.

[0094] As an example, a 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 battery cells, such as hexagonal prismatic battery cells.

[0095] The battery apparatus 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; as an example, a battery cell assembly can be a battery module, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0097] As an 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 may include a housing and one or more individual battery cells 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] 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.

[0104] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0105] In battery technology, pressure relief mechanisms can be incorporated into battery devices to improve their reliability. For example, when a battery cell experiences a short circuit or overcharging, it may lead to thermal runaway, causing a sudden increase in pressure or temperature. When a battery cell experiences thermal runaway, it releases waste into the battery pack, which in turn causes a sudden increase in pressure or temperature within the pack, potentially affecting other battery cells. In such cases, a pressure relief mechanism can release the internal pressure and temperature of the battery device, reducing the impact of the thermally runaway cell on other cells and thus decreasing the probability of the battery device exploding or catching fire.

[0106] In scenarios where a pressure relief mechanism is incorporated into a battery pack, this mechanism can be mounted on the battery housing. Typically, the exhaust channel of the pressure relief mechanism is positioned horizontally on the housing to allow the battery pack to quickly release internal pressure and temperature. However, in some applications, such as automotive applications, a horizontally positioned pressure relief mechanism can cause exhaust gases to spray outwards towards the vehicle's perimeter, potentially impacting pedestrians or other vehicles in the vicinity.

[0107] Therefore, this application provides a battery device including a battery cell, a housing, and a pressure relief mechanism. The housing has a receiving space for accommodating the battery cell. The housing includes a side wall and a bottom wall. The bottom wall is configured to support the battery cell, and the side walls surround the bottom wall. The pressure relief mechanism is disposed on the side wall and has an exhaust channel for discharging emissions from the receiving space. The exhaust channel is inclined downwards.

[0108] In such a battery device, the exhaust channel is inclined downwards, so that when the battery device is depressurized, the exhaust material discharged through the exhaust channel is discharged downwards, thereby reducing the impact of the exhaust material on the surrounding area of ​​the battery device in some specific application scenarios, and thus improving the reliability of the battery device.

[0109] Taking the application scenario of automobiles as an example, the battery device is usually located at the bottom of the car. When the exhaust channel is set to be tilted downward, the gas discharged through the exhaust channel can be discharged downward, which can reduce the impact on the environment around the car, such as the impact on other cars or pedestrians, thereby improving the reliability of the battery device.

[0110] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and 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.

[0111] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0112] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may 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.

[0113] 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.

[0114] 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.

[0115] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 according to some embodiments of this application. The battery device 100 may include a battery cell 20 and a housing 10, the housing 10 being used to house the battery cell 20.

[0116] The housing 10 has an enclosed space inside for accommodating the battery cells 20. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which are interlocked. The first housing 11 and the second housing 12 can have various shapes, such as cuboids or cylinders. The first housing 11 can be a hollow structure open on one side, and the second housing 12 can also be a hollow structure open on one side. The open side of the second housing 12 interlocks with the open side of the first housing 11, thus forming a housing 10 with an enclosed space. Alternatively, the first housing 11 can be a hollow structure open on one side, and the second housing 12 can be a plate-like structure, with the second housing 12 interlocked with the open side of the first housing 11, thus forming a housing 10 with an accommodating space 101.

[0117] In the battery device 100, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Alternatively, multiple battery cells 20 can be first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. Another option is that all battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the whole consisting of all battery cells 20 is housed within the housing 10.

[0118] In some embodiments, please refer to Figure 3 , Figure 3 This is a schematic diagram illustrating the connection structure between a battery cell 20 and a busbar 30 in some embodiments of this application. The battery device 100 may further include a busbar 30, through which multiple battery cells 20 can be electrically connected to each other, enabling series, parallel, or mixed connection of multiple battery cells 20. The busbar 30 may be a metallic conductor, such as copper, iron, aluminum, stainless steel, or aluminum alloy.

[0119] In some embodiments, please refer to Figure 4 , Figure 4 This is an exploded structural diagram of a battery cell 20 according to some embodiments of this application. The battery cell 20 may include a housing 202 and an electrode assembly 203, with the electrode assembly 203 housed within the housing 202.

[0120] In some embodiments, the housing 202 may include a housing 2021 and an end cap 2022, the housing 2021 having an opening, and the end cap 2022 closing the opening of the housing 2021. Here, "closing" refers to covering or shutting down, and can be either sealed or unsealed.

[0121] The housing 2021 is a component used to house the electrode assembly 203. The housing 2021 can be a hollow structure with an opening at one end, or a hollow structure with openings at both opposite ends. The housing 2021 can have various shapes, such as cylindrical or cuboid. The housing 2021 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 203 can be partially or completely housed within the housing 2021.

[0122] End cap 2022 and housing 2021 together define a receiving space for accommodating electrode assembly 203 and other components. End cap 2022 can be connected to housing 2021 by welding, roll sealing, or other methods to close the opening of housing 2021. The shape of end cap 2022 can be adapted to the shape of housing 2021. For example, if housing 2021 is a cuboid structure, end cap 2022 can be a rectangular plate structure adapted to housing 2021; or if housing 2021 is a cylindrical structure, end cap 2022 can be a circular plate structure adapted to housing 2021. The material of end cap 2022 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The materials of end cap 2022 and housing 2021 can be the same or different.

[0123] In an embodiment where the housing 2021 has an opening at one end, one end cap 2022 may be provided. In an embodiment where the housing 2021 has openings at both opposite ends, two end caps 2022 may be provided, with the two end caps 2022 respectively closing the two openings of the housing 2021, and the two end caps 2022 and the housing 2021 together defining the receiving space.

[0124] In some embodiments, the battery cell 20 may further include electrode terminals 201, which are disposed on the housing 202. The electrode terminals 201 are used for electrical connection with the tabs of the electrode assembly 203 to input or output electrical energy from the battery cell 20. The electrode terminals 201 may be disposed on the housing 2021 of the housing 202 or on the end cap 2022 of the housing 202. Electrode terminals 201 of different polarities of a battery cell 20 may be disposed on the same side of the housing 202 or on different sides of the housing 202. The electrode terminals 201 and the tabs may be directly connected, for example, by welding. The electrode terminals 201 and the tabs may also be indirectly connected, for example, by a current collector. The current collector may be a metallic conductor, such as copper, iron, aluminum, steel, or aluminum alloy.

[0125] As an example, in Figure 4 In the illustrated embodiment, one end of the housing 2021 is open, and there is one end cap 2022 in the outer shell 202, which closes one opening of the housing 2021. Two electrode terminals 201 are provided on the end cap 2022, namely a positive electrode terminal 201 and a negative electrode terminal 201. A positive electrode tab and a negative electrode tab are formed on the end of the electrode assembly 203 facing the end cap 2022. The positive electrode terminal 201 is electrically connected to the positive electrode tab, and the negative electrode terminal 201 is electrically connected to the negative electrode tab.

[0126] Please see Figures 5-8 , Figure 5 This is a schematic diagram of the structure of a battery device 100 according to some embodiments of this application; Figure 6 This is a side view of the housing 10 according to some embodiments of this application; Figure 7 for Figure 6 AA section view; Figure 8 for Figure 7 A partial enlarged view at point A. This application provides a battery device 100, including a battery cell 20, a housing 10, and a pressure relief mechanism 30. The housing 10 has a receiving space 101 for accommodating the battery cell 20. The housing 10 includes side walls 102 and a bottom wall 103. The bottom wall 103 is configured to support the battery cell 20, and the side walls 102 surround the bottom wall 103. The pressure relief mechanism 30 is disposed on the side walls 102 and has an exhaust channel 301 for discharging emissions from the receiving space 101. The exhaust channel 301 is inclined downwards.

[0127] The pressure relief mechanism 30 is a component or part that releases internal pressure or temperature when the internal pressure, temperature, or other conditions of the battery device 100 reach a predetermined threshold. This threshold design can vary depending on design requirements. The pressure relief mechanism 30 can take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically employ pressure-sensitive or temperature-sensitive elements or structures. That is, when the internal pressure, temperature, or other conditions of the battery device 100 reach the predetermined threshold, the pressure relief mechanism 30 actuates, thereby forming an opening or channel for the release of internal pressure or temperature.

[0128] The pressure relief mechanism 30 can also be referred to as the pressure relief mechanism 30 opening. When the pressure relief mechanism 30 is in operation, the high-temperature and high-pressure substances inside the battery device 100 are discharged outwards from the pressure relief point. In this way, the battery device 100 can be depressurized and de-temperatured under controllable pressure or temperature, thereby reducing the probability of potentially more serious accidents.

[0129] The side wall 102 may include multiple sub-side walls, which are connected end to end. The housing 10 may or may not have a mounting beam 1021. If the housing 10 has a mounting beam 1021, it may be a portion of the sub-side walls 102 that serve as the mounting beam 1021, or it may be all of the sub-side walls. It may be a portion of the sub-side walls that are equipped with a pressure relief mechanism 30, or it may be all of the sub-side walls that are equipped with a pressure relief mechanism 30.

[0130] The sub-sidewalls in sidewall 102 can be three, four, five, etc., and the sub-sidewalls can be in the shape of rectangular plates.

[0131] The sidewall 102 of the housing 10 can be either a separate unit or a single piece. In some examples, when the sidewall 102 is a separate unit, multiple sub-sidewalls can be manufactured and installed separately. These multiple sub-sidewalls can be connected by welding, riveting, snap-fitting, or other methods to form the overall sidewall 102. In other examples, the sidewall 102 can also be a single piece. For example, it can be formed by integral molding to enclose and form the accommodating space 101, or by stamping or casting.

[0132] The side wall 102 and the bottom wall 103 can be integrally formed, for example, the side wall 102 and the bottom wall 103 can be obtained by stamping or casting to form an integral side wall 102 and bottom wall 103. The side wall 102 and the bottom wall 103 can also be set separately and connected, for example, the side wall 102 and the bottom wall 103 can be obtained by welding, riveting, snap-fitting or other methods to form separate side wall 102 and bottom wall 103.

[0133] The downward tilt of the exhaust passage 301 means that in a specific application scenario, the exhaust passage 301 is tilted downward so that when discharging the emissions from the battery device 100, the emissions can be discharged through the downward tilt of the exhaust passage 301.

[0134] In the above embodiments, the exhaust channel 301 is inclined downwards, so that when the battery device 100 is depressurized, the exhaust material discharged through the exhaust channel 301 is discharged downwards, thereby reducing the impact of the discharged material on the surrounding area of ​​the battery device 100 in some specific application scenarios, and thus improving the reliability of the battery device 100.

[0135] Taking the application scenario of automobiles as an example, the battery device 100 is usually located at the bottom of the automobile. When the exhaust channel 301 is set to a downward angle, the gas discharged through the exhaust channel 301 can be discharged downward angled, which can reduce the impact on the environment around the automobile, such as the impact on other automobiles or pedestrians, thereby improving the reliability of the battery device 100.

[0136] In some embodiments, see still Figures 5-8 The side wall 102 includes multiple side beams connected end to end. At least one of the side beams is a load-bearing beam 1021, and the pressure relief mechanism 30 is disposed on the load-bearing beam 1021.

[0137] A side beam can be considered as a sub-side wall of side wall 102. Multiple side beams are connected end to end to form side wall 102 and surround the bottom wall 103.

[0138] It is understandable that among multiple edge beams, one edge beam can be a load-bearing beam 1021, or multiple edge beams can be load-bearing beams 1021. If there is only one load-bearing beam 1021, it can be equipped with one or more pressure relief mechanisms 30. If there are multiple load-bearing beams 1021, some of the load-bearing beams 1021 can be equipped with pressure relief mechanisms 30, or all of the load-bearing beams 1021 can be equipped with pressure relief mechanisms 30. When multiple load-bearing beams 1021 are equipped with pressure relief mechanisms 30, one or more pressure relief mechanisms 30 can be installed on each load-bearing beam 1021.

[0139] The mounting beam 1021 may be provided with mounting holes 102121, and the pressure relief mechanism 30 is installed in the mounting holes 102121. The axial direction of the mounting holes 102121 is consistent with the extension direction of the exhaust passage 301. The pressure relief mechanism 30 can extend directly into the receiving space 101 to achieve communication between the exhaust passage 301 and the receiving space 101. Alternatively, a channel can be provided in the mounting beam 1021 to achieve communication between the exhaust passage 301 and the receiving space 101.

[0140] The mounting beam 1021 is used to connect the housing 10 to the electrical equipment. The mounting beam 1021 has a mounting part 10215 for connecting to external components. In the example where the electrical equipment is a vehicle 1000, the mounting part 10215 can be configured as multiple through holes formed in the mounting beam 1021 for bolts to pass through. After passing through the through holes, the bolts are connected to the frame of the vehicle 1000, fixing the housing 10 under the frame of the vehicle 1000.

[0141] The mounting beam 1021 can be a hollow profile, which makes the box 10 lighter. The mounting beam 1021 can also be a solid profile to make the box 10 stronger.

[0142] The mounting beam 1021 can be integrally formed with the bottom wall 103 to increase the connection strength between the mounting beam 1021 and the bottom wall 103. Alternatively, the mounting beam 1021 can be separately set from the bottom wall 103 to improve the flexibility of the box body 10 manufacturing.

[0143] The pressure relief mechanism 30 can be mounted by providing mounting holes 102121 on the housing 10. The tilt angle of the pressure relief mechanism 30 can be adjusted by adjusting the tilt angle of the mounting holes 102121. In some applications, to reduce the weight of the battery device 100, the side wall 102 of the housing 10 is made thinner. When the side wall 102 is thinner, it is more difficult to provide tilted mounting holes 102121 on the side wall 102. This also makes it more difficult to tilt the exhaust channel 301 of the pressure relief mechanism 30 downwards on the side wall 102, thus requiring the exhaust channel 301 of the pressure relief mechanism 30 to be vertically positioned on the side wall 102.

[0144] To allow the exhaust channel 301 to be installed at a downward angle on the side wall 102, the side wall 102 can be thickened to facilitate the installation of the downward-sloping exhaust channel 301. When the mounting beam 1021 is a hollow profile and forms an internal cavity 10211, the cavity wall of the cavity 10211 can also be set to be upward-sloping, and the exhaust channel 301 of the pressure relief mechanism 30 can be vertically installed on the cavity wall of the cavity 10211 to obtain the downward-sloping exhaust channel 301.

[0145] In the above embodiment, the pressure relief mechanism 30 is disposed on the mounting beam 1021. While satisfying the requirement that the battery device 100 has a better weight reduction effect, the characteristics of the mounting beam 1021 can be directly utilized to set up a pressure relief mechanism 30 with a downwardly inclined exhaust channel 301. Thus, while the battery device 100 has a good weight reduction effect, the processing difficulty can also be taken into account.

[0146] In some embodiments, see still Figure 7 and Figure 8 The mounting beam 1021 is provided with at least one cavity 10211.

[0147] The mounting beam 1021 with cavity 10211 can be obtained by extrusion molding or casting molding.

[0148] The inclusion of cavities 10211 in the mounting beam 1021 enables the box body 10 to be lighter. When adding cavities 10211, the larger the volume of each cavity 10211, the better the weight reduction effect on the box body 10. With a fixed volume of cavities 10211, the more cavities 10211 there are, the higher the strength of the mounting beam 1021. However, in specific application scenarios, the inclusion of cavities 10211 can have a certain impact on the strength of the mounting beam 1021. Therefore, when adding cavities 10211, the volume and number of cavities can be selectively set according to the specific application scenario, the specific dimensions and materials of the mounting beam 1021.

[0149] The mounting beam 1021 can be equipped with one cavity 10211, two cavities 10211, three cavities 10211, etc.

[0150] In the above embodiment, by providing a cavity 10211 on the mounting beam 1021, the weight of the battery device 100 can be reduced on the one hand, and raw materials can be saved on the other hand, improving the economy of the battery device 100. Furthermore, the cavity 10211 can absorb energy, and when the battery device 100 is subjected to a collision, the impact of the collision on the battery cells 20 inside the housing 10 can be reduced.

[0151] In some embodiments, see still Figure 8 At least one cavity 10211 includes a first cavity 102111, and a pressure relief mechanism 30 is disposed on the cavity wall of the first cavity 102111. The first cavity 102111 is configured to communicate with the receiving space 101 and the exhaust passage 301.

[0152] The pressure relief mechanism 30 can be installed on any cavity wall of the first cavity 102111, so that the exhaust channel 301 of the pressure relief mechanism 30 is inclined downward, and the exhaust material discharged through the exhaust channel 301 is discharged downward.

[0153] In the above embodiment, in the scenario where the mounting beam 1021 is provided with a cavity 10211, the pressure relief mechanism 30 can be provided based on the cavity wall of one of the cavities 10211 (the first cavity 102111), which makes it easier to obtain a pressure relief mechanism 30 with a downwardly inclined exhaust channel 301, and has the advantage of low processing difficulty.

[0154] In some embodiments, see still Figure 8 And further reading Figure 9 and Figure 10 , Figure 9 This is an exploded structural diagram of the housing 10 and the pressure relief mechanism 30 in the battery device 100 of some embodiments of this application; Figure 10 for Figure 9 A partial enlarged view at point B. The cavity wall of the first cavity 102111 includes a first cavity wall 10212 located at the bottom of the first cavity 102111. The first cavity wall 10212 is inclined upward and has a mounting hole 102121. The pressure relief mechanism 30 is mounted in the mounting hole 102121.

[0155] In the above embodiment, the first cavity wall 10212 is inclined upwards, and a mounting hole 102121 perpendicular to the first cavity wall 10212 can be directly provided on the first cavity wall 10212. This allows the exhaust channel 301 of the pressure relief mechanism 30, which is installed in the mounting hole 102121, to be inclined downwards on the first cavity wall 10212, reducing the processing difficulty of setting the pressure relief mechanism 30. Furthermore, by setting the mounting hole 102121 on the first cavity wall 10212 located at the bottom of the first cavity 10211, and by providing the downwardly inclined exhaust channel 301 based on the first cavity wall 10212, the emissions discharged by the battery device 100 through the exhaust channel 301 can be discharged downwards as much as possible in specific application scenarios, thereby reducing the impact of emissions on the surrounding area of ​​the battery device 100.

[0156] In some embodiments, see still Figure 8 And further reading Figure 11 , Figure 11 The following is a schematic diagram of the structure of the battery device 100 according to other embodiments of this application. The cavity wall of the first cavity 102111 includes a second cavity wall 10213. The second cavity wall 10213 is a common wall of the accommodating space 101 and the first cavity 102111. The second cavity wall 10213 is provided with a channel 102131, which connects the accommodating space 101 and the first cavity 102111. The accommodating space 101 and the first cavity 102111 are arranged adjacent to each other, such that the second cavity wall 10213 is a common wall of the accommodating space 101 and the first cavity 102111. The second cavity wall 10213 is provided with a channel 102131, which allows the accommodating space 101 and the first cavity 102111 to communicate. When the pressure relief mechanism 30 releases pressure, the discharge in the housing 10 flows from the accommodating space 101 through the first cavity 102111 and is discharged from the pressure relief mechanism 30 provided on the cavity wall of the first cavity 102111, so as to realize the pressure relief action of the battery device 100.

[0157] In some embodiments, see still Figure 8The bottom wall 103 supports the battery cell 20 along the first direction X. At least one cavity 10211 includes a second cavity 102112. The first cavity 102111 and the second cavity 102112 are arranged along the first direction X, and the second cavity 102112 is located on the side of the first cavity 102111 away from the bottom wall 103.

[0158] In the above embodiment, by arranging a first cavity 102111 and a second cavity 102112 along the first direction X, and connecting the first cavity 102111 to the accommodating space 101 and the exhaust channel 301, the emissions discharged when the battery device 100 is depressurized are less dispersed as they pass through the hanging beam 1021, and the emissions can be discharged from the depressurization mechanism 30 more quickly, reducing the impact of the emissions on the battery device 100. Furthermore, the second cavity 102112 is located on the side of the first cavity 102111 away from the bottom wall 103, allowing the depressurization mechanism 30, which is mounted on the cavity wall of the first cavity 102111, to be positioned as close to the bottom as possible. In specific application scenarios, the depressurization mechanism 30 is positioned close to the bottom and tilted downwards, ensuring that when the battery device 100 is depressurized, the emissions discharged through the depressurization mechanism 30 are discharged downwards and tilted downwards as much as possible, further reducing the impact on the environment surrounding the battery device 100.

[0159] In other embodiments, the bottom wall 103 supports the battery cell 20 along a first direction X, and at least one cavity 10211 includes a second cavity 102112. The first cavity 102111 and the second cavity 102112 are arranged along the first direction X, and the first cavity 102111 is located on the side of the second cavity 102112 away from the bottom wall 103. In the above embodiments, the first cavity 102111 may also be located in the upper position, and then the pressure relief mechanism 30 is disposed on the cavity wall of the upper first cavity 102111 and inclined downward.

[0160] In some embodiments, see still Figure 8 The cavity wall of the first cavity 102111 includes a first cavity wall 10212 located at the bottom of the first cavity 102111, and the first cavity wall 10212 is inclined upward; the cavity wall of the second cavity 102112 includes a third cavity wall 10214 located at the top of the second cavity 102112, and the third cavity wall 10214 is inclined downward.

[0161] In the above embodiment, the first cavity 102111 and the second cavity 102112 are arranged along the first direction X, and the second cavity 102112 is located on the side of the first cavity 102111 away from the bottom wall 103. The first cavity wall 10212 located at the bottom of the first cavity 102111 is the cavity wall on the side away from the second cavity 102112. Similarly, the third cavity wall 10214 located at the top of the second cavity 102112 is also the cavity wall on the side away from the first cavity 102111. The first cavity wall 10212 is inclined upward, which can be understood as the first cavity wall 10212 gradually tilting upward towards the area where the second cavity 102112 is located along the direction away from the receiving space 101. Similarly, the third cavity wall 10214 is inclined downward, which can be understood as the third cavity wall 10214 gradually tilting downward towards the area where the first cavity 102111 is located along the direction away from the receiving space 101. This design allows the first cavity wall 10212 and the third cavity wall 10214 to have a gradually converging structure, which can improve the overall strength and reliability of the mounting beam 1021.

[0162] In some embodiments, see still Figure 8 The mounting beam 1021 includes a mounting part 10215, which is located on the side of the first cavity 102111 and the second cavity 102112 away from the accommodating space 101. The first cavity wall 10212 and the third cavity wall 10214 are both connected to the mounting part 10215.

[0163] The mounting part 10215 is a component used to connect the battery device 100 to other electrical devices. Taking a vehicle 1000 as an example, the mounting part 10215 can be provided with multiple through holes for bolts to pass through. After the bolts pass through the through holes, they are connected to the frame of the vehicle 1000, fixing the housing 10 to the frame of the vehicle 1000.

[0164] In the above embodiment, the mounting part 10215 is provided on the side of the first cavity 102111 and the second cavity 102112 away from the accommodating space 101, which can reduce the possible mutual interference between the mounted part 10215 and the pressure relief mechanism 30.

[0165] In some embodiments, see still Figure 8 The cavity 10211 extends through the mounting beam 1021 along the extension direction of the mounting beam 1021.

[0166] The mounting beam 1021 can extend in one direction (and its opposite direction), or it can have a curved structure and extend in at least two directions (and their opposite directions). When the mounting beam 1021 extends in one direction, the cavity 10211 passes through the mounting beam 1021 in one direction; when the mounting beam 1021 extends in two directions, the cavity 10211 passes through the mounting beam 1021 in both directions.

[0167] In the above embodiment, the cavity 10211 penetrates the mounting beam 1021, and openings are formed on opposite sides of the cavity 10211 in the extending direction. This arrangement enables the mounting beam 1021 to have a better weight reduction effect. At the same time, the cavity 10211 is through-through, making the processing simpler.

[0168] In some embodiments, see still Figure 8 and Figure 10 Along the extension direction of the mounting beam 1021, openings are formed at both ends of the cavity 10211. A sealing element 10216 is provided at both ends of the mounting beam 1021 to seal the openings formed at both ends of the cavity 10211.

[0169] The sealing element 10216 can be a metal sealing plate, which can be welded to the end of the cavity 10211. The sealing element 10216 can also be made of non-metallic materials, such as by using an adhesive to form the sealing element 10216.

[0170] The interior of the battery device 100 typically needs to be a sealed space to reduce the impact of the external environment on the battery cells 20. When a pressure relief mechanism 30 is provided on the mounting beam 1021, a corresponding connecting channel needs to be provided so that the receiving space 101 is connected to the exhaust channel 301 of the pressure relief mechanism 30. In this case, it may be necessary to provide a through hole in the cavity wall of the cavity 10211 to achieve the connection between the receiving space 101 and the exhaust channel 301 of the pressure relief mechanism 30. In some examples, a channel 102131 and a mounting hole 102121 for installing the pressure relief mechanism 30 can be provided in the cavity wall of the cavity 10211. In this case, the cavity 10211 is connected to the receiving space 101 through the channel 102131. In other examples, the receiving space 101 can be connected to the exhaust channel 301 via a conduit. In this case, a channel 102131 needs to be provided in the cavity wall of the cavity 10211 so that the conduit can communicate with the receiving space 101 and the exhaust channel 301 through the channel 102131. In the scenario where the channel 102131 and the mounting hole 102121 are provided, the cavity 10211 penetrating the mounting beam 1021 will reduce the sealing performance of the battery device 100.

[0171] Therefore, in order to improve the sealing performance of the accommodating space 101, when a cavity 10211 is provided through the hanging beam 1021, sealing elements can be provided at the opening positions at both ends of the cavity 10211 to block the opening of the cavity 10211, thereby reducing the impact of the decrease in the sealing performance of the accommodating space 101 caused by the provision of the cavity 10211.

[0172] In some embodiments, see still Figure 11 The bottom wall 103 supports the battery cell 20 along the first direction X. Multiple side beams include two mounting beams 1021, which are arranged opposite each other along the second direction Y. The housing 10 also includes two expansion beams 104, which are arranged opposite each other along the third direction Z. Each expansion beam 104 is connected at both ends along the second direction Y to the two mounting beams 1021, and the battery cell 20 is located between the two expansion beams 104. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0173] The expansion beam 104 is a beam-like structure spanning the side walls 102 of the housing 10. The space inside the housing 10 can be divided into two parts by the expansion beam 104. One part is the receiving space 101 defined by the expansion beam 104 together with the side walls 102 and bottom wall 103 of the housing 10. This receiving space 101 can accommodate multiple battery cells 20 arranged in an array. The other part can be the installation space for accommodating the battery management system (BMS), high-voltage box, etc. The expansion beam 104 can be made of wall material or extruded profile. The expansion beam 104 is configured to bend and deform as the battery cells 20 within the receiving space 101 expand.

[0174] Taking the square-shell battery cell 20 as an example, when the battery cell 20 expands, the larger surface area of ​​the battery cell 20 allows for greater deformation. The superposition of the deformation of multiple battery cells 20 will cause the housing 10 containing the battery cells 20 to expand and deform outward. As a relatively weak structural component forming the housing space 101, the expansion beam 104 will bend and deform directly under the action of the battery cells 20. Moreover, since the expansion amount of the battery cell 20 increases with the increase of its cycle number, the deformation amount of the expansion beam 104 also increases with the increase of the expansion amount of the battery cell 20.

[0175] In the above embodiments, by providing the expansion beam 104, the protection performance of the battery cell 20 can be improved, thereby improving the overall reliability of the battery device 100.

[0176] Furthermore, based on the expansion beam 104, along the third direction Z, the pressure relief mechanism 30 can be set between the two expansion beams 104 so that when the battery cell 20 experiences thermal runaway, the emissions in the housing space 101 where the battery cell 20 is placed can be quickly discharged to the outside of the housing 10.

[0177] In some embodiments, please refer back to the reference. Figure 8 The bottom wall 103 supports the battery cell 20 along the first direction X, and the extension direction of the exhaust channel 301 forms an angle α with the first direction X, where 20°≤α≤80°. With this arrangement, when the battery device 100 is depressurized, the emissions discharged through the exhaust channel 301 can be discharged downwards, thereby reducing the impact of the battery device 100 on the surrounding environment in the event of thermal runaway.

[0178] In some embodiments, please refer back to the reference. Figure 8 30°≤α≤60°. With this setting, when the battery device 100 is depressurized, the emissions discharged through the exhaust channel 301 can be discharged more downwards, thereby reducing the impact of the battery device 100 on the surrounding environment in the event of thermal runaway.

[0179] In some embodiments, please refer to Figure 12 , Figure 12 This is an exploded structural diagram of the battery device 100 according to other embodiments of this application. The bottom wall 103 and the side wall 102 are separately provided and connected. The bottom wall 103 and the side wall 102 are separately provided, and the bottom wall 103 and the side wall 102 can be manufactured separately during the manufacturing process, thereby improving the flexibility of manufacturing and thus improving the overall economy of the battery device 100.

[0180] In some embodiments, please refer to Figure 13 , Figure 13 The diagram shows an exploded view of the battery device 100 according to other embodiments of this application. The housing 10 also includes a top wall 105, which is disposed on the side of the side wall 102 away from the bottom wall 103. The top wall 105 and the side wall 102 are separately disposed but connected. This arrangement allows the bottom wall 103, side wall 102, and top wall 105 to be manufactured separately during the manufacturing process, thereby improving manufacturing flexibility and ultimately improving the overall economic efficiency of the battery device 100.

[0181] In some embodiments of this application, a battery device 100 is provided, including a battery cell 20, a housing 10, and a pressure relief mechanism 30. The housing 10 includes a bottom wall 103 and a plurality of side beams. The bottom wall 103 supports the battery cell 20 along a first direction X. Among the plurality of side beams, there are two mounting beams 1021 arranged opposite each other along a second direction Y. The housing 10 is provided with two expansion beams 104 arranged opposite each other along a third direction Z. The two ends of the expansion beams 104 are respectively connected to the two mounting beams 1021. The two expansion beams 104 and the two mounting beams 1021 enclose a receiving space 101 for placing the battery cell 20. The mounting beam 1021 is provided with multiple cavities 10211, including a first cavity 102111 and a second cavity 102112 arranged along the first direction X. The second cavity 102112 is located on the side of the first cavity 102111 away from the bottom wall 103. The mounting beam 1021 also includes a mounting part 10215 located in the first cavity 102111 and the second cavity 102112 away from the accommodating space 101. The first cavity 102111 includes a second cavity wall 10213, which is a common wall for the accommodating space 101 and the first cavity 102111. The first cavity 102111 also includes a first cavity wall 10212 connecting the second cavity wall 10213 and the mounting part 10215. The first cavity wall 10212 is located at the bottom of the first cavity 102111 and is inclined upward. The second cavity 102112 has a third cavity wall 10214 located at the top of the second cavity 102112 and inclined downward. The second cavity wall 10213 has a channel 102131, and the first cavity wall 10212 has a mounting hole 102121. The pressure relief mechanism 30 is installed in the mounting hole 102121 so that the first cavity 102111 is connected to the exhaust channel 301. The first cavity 102111 is connected to the receiving space 101 through the channel 102131 so that the final exhaust channel 301 can be connected to the receiving space 101 through the first cavity 102111. The exhaust channel 301 is inclined downward, and the angle between the extension direction of the exhaust channel 301 and the first direction X is α, where 30°≤α≤60°. The cavity 10211 extends through the mounting beam 1021 along the extension direction of the mounting beam 1021. Openings are formed at both ends of the cavity 10211, and sealing members 10216 are provided at both ends of the mounting beam 10211 to seal the openings formed at both ends of the cavity 10211. The bottom wall 103 and the side wall 102 are separately set and connected.

[0182] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0183] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a battery cell; a box body having a receiving space for receiving the battery cell; the box body comprises a bottom wall configured to support the battery cell and a side wall surrounding the bottom wall; a pressure relief mechanism provided on the side wall, the pressure relief mechanism having an exhaust passage for discharging exhaust in the receiving space, the exhaust passage being inclined downward.

2. The battery device according to claim 1, characterized by The side wall comprises a plurality of edge beams connected in sequence, at least one of the plurality of edge beams being a mounting beam, and the pressure relief mechanism is provided on the mounting beam.

3. The battery device of claim 2, wherein, The mounting beam is provided with at least one cavity.

4. The battery device of claim 3, wherein At least one of the cavities comprises a first cavity, and the pressure relief mechanism is provided on a cavity wall of the first cavity, the first cavity being configured to communicate the receiving space and the exhaust passage.

5. The battery device of claim 4, wherein, The cavity wall of the first cavity comprises a first cavity wall located at the bottom of the first cavity, the first cavity wall being inclined upward, and the first cavity wall is provided with a mounting hole, and the pressure relief mechanism is mounted in the mounting hole.

6. The battery device of claim 4, wherein The cavity wall of the first cavity comprises a second cavity wall, the second cavity wall being a common wall of the receiving space and the first cavity, and the second cavity wall is provided with a channel, and the channel communicates the receiving space and the first cavity.

7. The battery device of claim 4, wherein The bottom wall supports the battery cell along a first direction, at least one of the cavities comprises a second cavity, the first cavity and the second cavity are arranged along the first direction, and the second cavity is located on a side of the first cavity away from the bottom wall.

8. The battery device of claim 7, wherein, The cavity wall of the first cavity comprises a first cavity wall located at the bottom of the first cavity, and the first cavity wall is inclined upward; the cavity wall of the second cavity comprises a third cavity wall located at the top of the second cavity, and the third cavity wall is inclined downward.

9. The battery device of claim 8, wherein, The mounting beam comprises a mounting portion, the mounting portion is located on a side of the first cavity and the second cavity away from the receiving space, and the first cavity wall and the third cavity wall are both connected to the mounting portion.

10. The battery device of claim 3, wherein The cavity penetrates through the mounting beam along the extension direction of the mounting beam.

11. The battery device of claim 10, wherein, Along the extension direction of the mounting beam, both ends of the cavity are formed with openings; both ends of the mounting beam are provided with blocking members, and the blocking members block the openings.

12. The battery device of claim 2, wherein, The bottom wall supports the battery cell along a first direction; The plurality of edge beams comprises two mounting beams, and the two mounting beams are oppositely arranged along a second direction; The box body further comprises two expansion beams oppositely arranged along a third direction, each expansion beam is connected to two mounting beams along two ends of the second direction, the battery cell is located between the two expansion beams, and the first direction, the second direction and the third direction are perpendicular to each other.

13. The battery device according to any one of claims 1 to 12, wherein The bottom wall supports the battery cell along a first direction, and the extension direction of the exhaust passage and the first direction form an angle α, 20°≤α≤80°.

14. The battery device of claim 13, wherein, 30°≤α≤60°。 15. The battery device according to any one of claims 1 to 12, wherein The bottom wall and the side wall are separately provided and connected.

16. The battery device according to any one of claims 1 to 12, wherein The box body further comprises a top wall provided on a side of the side wall away from the bottom wall, and the top wall and the side wall are separately provided and connected.

17. An electrical device, comprising: The battery device comprises any one of claims 1-16.

18. The powered device of claim 17, wherein, The electrical device is a vehicle, the vehicle having a passenger compartment, the battery device being located at the bottom of the passenger compartment.

Images