Battery device and electric device

Abstract

Embodiments of the present application provide a battery device and an electric device. The battery device comprises battery cells and a case. Each battery cell is provided with a first pressure relief mechanism; the case is provided with an accommodating space for accommodating the battery cells, wherein the case is further provided with an exhaust channel, the exhaust channel is communicated with the accommodating space, and the exhaust channel is used for guiding emissions of the battery cells out of the case when the first pressure relief mechanism is actuated, the minimum flow area of the exhaust channel is S1, and the area of an inlet of the exhaust channel is S2, satisfying 1.66≤S2 / S1≤160, 10 mm2≤S1≤90 mm2, and 150 mm2≤S2≤3200 mm2. The technical solution of the present application can reduce environmental pollution of a battery device under thermal runaway conditions.

Description

Battery devices and electrical appliances Technical Field

[0001] This application relates to the field of battery device 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 electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the manufacturing process of battery devices, the environmental friendliness under thermal runaway conditions is a crucial issue. Therefore, how to reduce environmental pollution under thermal runaway conditions is a pressing technical problem that needs to be solved in battery device technology. Summary of the Invention

[0004] This application provides a battery device and an electrical device that can reduce environmental pollution in the event of thermal runaway of the battery device.

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

[0006] In a first aspect, embodiments of this application provide a battery device, which includes a battery cell and a housing. The battery cell has a first pressure relief mechanism; the housing has a receiving space for accommodating the battery cell; wherein the housing also has an exhaust channel communicating with the receiving space, the exhaust channel being used to guide the discharge of the battery cell's emissions to the outside of the housing when the first pressure relief mechanism is actuated, the minimum flow area of ​​the exhaust channel is S1, and the area of ​​the exhaust channel's inlet is S2, satisfying 1.66≤S2 / S1≤160, 10mm 2 ≤S1≤90mm 2 150mm 2 ≤S2≤3200mm 2 .

[0007] According to the battery device of this application embodiment, when the first pressure relief mechanism is activated, the high-temperature and high-pressure material inside the battery cell is discharged outward from the actuation part as a discharge and enters the containment space. It undergoes preliminary cooling in the containment space and then enters the exhaust channel. During the flow through the exhaust channel, it is further cooled down and finally discharged out of the box through the exhaust port of the exhaust channel. When the discharge flows through the containment space and the exhaust channel, some solid particles in the discharge are deposited in the containment space and the exhaust channel due to gravity. Some gas in the discharge condenses and agglomerates into droplets, and some solid particles adhere to the droplets and remain in the containment space and the exhaust channel with the droplets, thereby reducing the content of solid particles and harmful substances in the discharge discharged to the outside of the box.

[0008] If the area of ​​the air inlet in the exhaust channel is too large compared to the minimum flow area of ​​the exhaust channel, the exhaust materials cannot be discharged quickly, resulting in excessive internal pressure and failure of the seal. If the area of ​​the air inlet in the exhaust channel is too small compared to the minimum flow area of ​​the exhaust channel, the exhaust materials flow too fast within the exhaust channel, have a short residence time, and experience poor cooling, resulting in excessively high temperatures of the exhaust materials discharged to the outside of the exhaust channel, polluting the environment.

[0009] By setting the ratio of the area of ​​the air inlet of the exhaust channel to the minimum flow area of ​​the exhaust channel to be greater than or equal to 1.66 and less than or equal to 160, the exhaust can be quickly discharged to the outside of the exhaust channel while ensuring that the exhaust has a longer residence time in the exhaust channel and is easy to cool down. This reduces the risk of the box seal failing due to internal pressure buildup.

[0010] If the air inlet area of ​​the exhaust channel is too small, it will be too small compared to the minimum flow area of ​​the exhaust channel. This will cause the exhaust to flow too quickly within the exhaust channel, resulting in a short residence time and poor cooling. Consequently, the exhaust will be discharged at a high temperature, polluting the environment. Conversely, if the air inlet area is too large, it will be too large compared to the minimum flow area of ​​the exhaust channel. This will prevent the exhaust from being discharged quickly, leading to excessive pressure buildup inside the enclosure and causing the enclosure seal to fail.

[0011] By setting the area of ​​the air intake in the exhaust channel to be greater than or equal to 150mm² 2 and less than or equal to 3200mm 2 Under the condition that the emissions have a long residence time in the exhaust channel and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel, reducing the risk of the box seal failure due to internal pressure buildup.

[0012] If the minimum flow area of ​​the exhaust channel is small, the area of ​​the air inlet will be too large compared to the minimum flow area. This prevents the exhaust from being discharged quickly, leading to excessive internal pressure and seal failure. Conversely, if the minimum flow area of ​​the exhaust channel is large, the area of ​​the air inlet will be too small compared to the minimum flow area. This results in excessively fast flow velocity of the exhaust within the channel, a short residence time, and poor cooling, leading to higher temperatures of the exhaust discharged and environmental pollution.

[0013] By setting the minimum flow area of ​​the exhaust channel to be greater than or equal to 10 mm2 and less than or equal to 90mm 2 Under the condition that the emissions have a long residence time in the exhaust channel and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel, reducing the risk of the box seal failure due to internal pressure buildup.

[0014] According to some embodiments of this application, 6 ≤ S2 / S1 ≤ 43.

[0015] When S2 / S1≥6, the emissions have a longer residence time in the exhaust channel, which facilitates the cooling of the emissions and results in lower temperatures of the emissions discharged to the outside of the exhaust channel. When S2 / S1≤43, the emissions can be discharged from the exhaust channel quickly, reducing the risk of the box seal failing due to internal pressure buildup.

[0016] According to some embodiments of this application, 20mm 2 ≤S1≤60mm 2 .

[0017] When S1≥20mm 2 This further enables emissions to be quickly discharged from the exhaust channel, reducing the risk of pressure buildup inside the enclosure leading to seal failure; when S1≤60mm 2 This further allows the emissions to have a longer residence time in the exhaust channel, which facilitates the cooling of the emissions, resulting in lower temperatures of the emissions discharged outside the exhaust channel.

[0018] According to some embodiments of this application, 200mm 2 ≤S2≤2200mm 2 .

[0019] When S2≥200mm 2 This further allows the emissions to remain in the exhaust channel for a longer time, facilitating the cooling of the emissions and resulting in lower temperatures for the emissions discharged outside the exhaust channel.

[0020] When S2≤2200mm 2 This further enables emissions to be quickly discharged from the exhaust channel, reducing the risk of pressure buildup inside the enclosure causing seal failure.

[0021] According to some embodiments of this application, the battery device further includes a throttling element disposed within an exhaust channel, the throttling element blocking the exhaust channel, the throttling element having a gap, the flow area of ​​the gap being the minimum flow area of ​​the exhaust channel.

[0022] By placing the throttling element inside the exhaust passage, the gap of the throttling element forms the minimum flow area of ​​the exhaust passage, which facilitates increasing the flow velocity of the exhaust at the gap, thereby reducing the temperature of the exhaust.

[0023] According to some embodiments of this application, the minimum width of the gap is H, which satisfies 0.1mm≤H≤1mm.

[0024] If the minimum width of the gap is too small, the exhaust material will easily clog the gap, causing excessive pressure inside the chamber and resulting in failure of the chamber's seal. If the minimum width of the gap is too large, the exhaust material will stay in the exhaust channel for a shorter time, resulting in poor cooling effect and higher temperature of the exhaust material discharged outside the exhaust channel.

[0025] By setting the minimum width of the gap to be greater than or equal to 0.1 mm and less than or equal to 1 mm, it is possible to facilitate the rapid discharge of emissions to the outside of the exhaust channel, reducing the risk of the box seal failing due to internal pressure buildup. It also allows the emissions to have a longer residence time in the exhaust channel, which helps the emissions cool down in the exhaust channel and lowers the temperature of the emissions discharged to the outside of the exhaust channel.

[0026] According to some embodiments of this application, 0.3mm ≤ H ≤ 0.7mm.

[0027] When H≥0.3mm, it further facilitates the rapid discharge of emissions to the outside of the exhaust channel, reducing the risk of the box seal failing due to internal pressure buildup; when H≤0.7mm, it further facilitates a longer residence time of emissions in the exhaust channel, which helps the emissions cool down in the exhaust channel and reduces the temperature of the emissions discharged to the outside of the exhaust channel.

[0028] According to some embodiments of this application, the throttling element is sealed to the wall of the exhaust passage.

[0029] By sealing the throttling device with the wall of the exhaust passage, the exhaust can only pass through the gap, so that the exhaust flows faster in the gap, which helps to reduce the temperature of the exhaust.

[0030] According to some embodiments of this application, there are multiple throttling elements, which are spaced apart along the extension direction of the exhaust passage.

[0031] By arranging multiple throttling elements at intervals along the extension direction of the exhaust passage, throttling of emissions can be achieved at multiple locations along the extension direction of the exhaust passage, which helps to reduce the temperature of the emissions.

[0032] According to some embodiments of this application, the exhaust channel includes a first channel section and a second channel section, the first channel section and the second channel section are connected by a pipe joint, and the flow area of ​​the second channel section is smaller than the flow area of ​​the first channel section.

[0033] By setting the flow area of ​​the second channel section to be smaller than that of the first channel section, the residence time of the exhaust material in the exhaust channel can be increased, which makes it easier to reduce the temperature of the exhaust material.

[0034] According to some embodiments of this application, the thermal conductivity of the exhaust channel wall is greater than or equal to 30 W / (m·K).

[0035] If the thermal conductivity of the exhaust channel wall is too low, the heat exchange effect between the exhaust and the exhaust channel wall will be poor, and the cooling effect of the exhaust will be poor.

[0036] By setting the thermal conductivity of the exhaust channel wall to be greater than or equal to 30 W / (m·K), the heat transfer between the exhaust and the exhaust channel wall is better, the cooling effect of the exhaust is better, and it is easier to reduce the temperature of the exhaust.

[0037] According to some embodiments of this application, the thermal conductivity of the exhaust channel wall is greater than or equal to 80 W / (m·K).

[0038] When the thermal conductivity of the exhaust channel wall is greater than or equal to 80 W / (m·K), the heat transfer effect between the exhaust and the exhaust channel wall is further improved, the cooling effect of the exhaust is better, and it is easier to reduce the temperature of the exhaust.

[0039] According to some embodiments of this application, the melting point of the exhaust channel wall is greater than or equal to 80°C.

[0040] If the melting point of the exhaust channel wall is too low, the wall of the exhaust channel is easily broken by the high-temperature exhaust, resulting in the failure of the box seal.

[0041] By setting the melting point of the exhaust channel wall to be greater than or equal to 80°C, the risk of box seal failure can be reduced, and the emissions can be cooled down in the exhaust channel.

[0042] According to some embodiments of this application, the melting point of the exhaust channel wall is greater than or equal to 120°C.

[0043] When the melting point of the exhaust channel wall is set to be greater than or equal to 120°C, the risk of box seal failure can be further reduced, and the emissions can be cooled in the exhaust channel.

[0044] According to some embodiments of this application, the minimum thickness of the wall of the exhaust channel is D, which satisfies 0.2mm≤D≤4mm.

[0045] If the minimum thickness of the exhaust channel wall is too small, the wall is easily breached by the high-temperature exhaust, leading to seal failure. If the minimum thickness of the exhaust channel wall is too large, the heat exchange between the exhaust and the exhaust channel will be poor, resulting in poor cooling of the exhaust.

[0046] By setting the minimum thickness of the exhaust channel wall to be greater than or equal to 0.2 mm and less than or equal to 4 mm, the heat transfer effect between the exhaust material and the exhaust channel wall is better, provided that the exhaust channel wall is not easily broken by the exhaust material, and the weight of the box can be designed to be lighter.

[0047] According to some embodiments of this application, 0.8mm ≤ D ≤ 3mm.

[0048] When D≥0.8mm, the risk of the exhaust channel wall being breached by the exhaust material is further reduced; when D≤3mm, the heat transfer effect between the exhaust material and the exhaust channel wall is further improved, which makes it easier to reduce the temperature of the exhaust material. At the same time, it makes the weight of the box design lighter.

[0049] According to some embodiments of this application, the housing includes a frame, the interior of which is hollow to form at least a partial exhaust channel.

[0050] By forming the exhaust channel inside the frame, the space occupied can be reduced and the space utilization rate can be improved, enabling the battery device to have a higher energy density.

[0051] According to some embodiments of this application, the exhaust channel extends circumferentially along the edge.

[0052] By extending the exhaust channel circumferentially along the frame, the exhaust channel can have a longer length, which facilitates the cooling of the exhaust material within the exhaust channel.

[0053] According to some embodiments of this application, the enclosure includes an enclosure body and an exhaust pipe, with a receiving space disposed within the enclosure body, the exhaust pipe connected to the enclosure body, and an exhaust channel formed inside the exhaust pipe.

[0054] By forming an exhaust channel inside the exhaust pipe, the exhaust pipe and the housing body can be set separately, which facilitates processing and manufacturing.

[0055] According to some embodiments of this application, the exhaust pipe is located outside the housing body, and one end of the exhaust pipe is connected to the housing body.

[0056] By placing the exhaust pipe outside the enclosure, the space utilization inside the enclosure can be improved.

[0057] According to some embodiments of this application, a flow-deflecting component is provided in the exhaust passage, which is used to change the flow path of the exhaust material in the exhaust passage.

[0058] By placing the baffle within the exhaust channel, the flow path of the exhaust gases can be altered, thus facilitating a reduction in the temperature of the exhaust gases.

[0059] According to some embodiments of this application, a filter element is provided in the exhaust channel, which is used to filter solid particles in the exhaust emissions.

[0060] By placing the filter element inside the exhaust channel, solid particles in the emissions can be filtered out, thereby reducing the pollution of the environment by the emissions.

[0061] According to some embodiments of this application, an adsorption component is provided in the exhaust channel, which is used to adsorb solid particles and / or liquids of the exhaust emissions in the exhaust channel.

[0062] By placing the adsorption component inside the exhaust channel, it is possible to adsorb solid particles and / or liquids in the emissions, thereby reducing the pollution of the environment by the emissions.

[0063] According to some embodiments of this application, the battery device further includes an airtight component disposed in the exhaust channel, the airtight component being used to seal the containment space.

[0064] By placing the airtight component in the exhaust channel, the airtight component can seal the containment space, thereby reducing the risk of external impurities (such as dust, water, etc.) entering the containment space and facilitating the improvement of the battery device's lifespan.

[0065] According to some embodiments of this application, the airtight component is a sealing membrane that covers the air inlet of the exhaust channel.

[0066] By covering the air inlet of the exhaust channel with a sealing film, external impurities can be prevented from entering the containment space when the battery device is working normally. Furthermore, when the first pressure relief mechanism is activated, the exhaust material can break through the sealing film and enter the exhaust channel, facilitating its discharge to the outside of the housing.

[0067] According to some embodiments of this application, the airtight component is a breather valve, which is located at the exhaust port of the exhaust channel.

[0068] By placing the breather valve at the exhaust port of the exhaust channel, it is easy to prevent external impurities from entering the exhaust channel. Furthermore, when the pressure inside the containment space is greater than the external pressure of the housing, the pressure inside the containment space can be released, which helps to improve the service life of the battery device.

[0069] According to some embodiments of this application, the shortest distance between the first pressure relief mechanism and the air inlet of the exhaust channel is L1, which satisfies 0.1m≤L1≤0.5mm.

[0070] If the shortest distance between the first pressure relief mechanism and the air inlet of the exhaust channel is too small, the emissions from the battery cells discharged when the first pressure relief mechanism is activated can easily enter the exhaust channel directly, resulting in insufficient cooling of the emissions within the containment space and a low cooling effect. If the shortest distance between the first pressure relief mechanism and the air inlet of the exhaust channel is too large, the emissions will remain in the containment space for too long, preventing them from being quickly discharged to the outside of the enclosure, leading to excessive internal pressure and failure of the enclosure seal.

[0071] By setting the shortest distance between the first pressure relief mechanism and the air inlet of the exhaust channel to be greater than or equal to 0.1m and less than or equal to 0.5m, the exhaust can be quickly discharged to the outside of the box while ensuring that the exhaust remains in the containment space for a longer time and that the cooling effect is good. This reduces the risk of the box failing to seal due to internal pressure buildup.

[0072] According to some embodiments of this application, 0.2m≤L1≤0.4m.

[0073] When L1≥0.2m, the discharge from the first pressure relief mechanism stays in the containment space for a longer time, allowing for a longer heat exchange time between the discharge and the air in the containment space, resulting in a better cooling effect for the discharge in the containment space. When L1≤0.4m, the risk of internal pressure buildup caused by the discharge staying in the containment space is further reduced, thereby reducing the risk of seal failure of the containment.

[0074] According to some embodiments of this application, the first pressure relief mechanism is offset from the air inlet of the exhaust channel.

[0075] By setting the first pressure relief mechanism and the air inlet of the exhaust channel separately, the emissions stay in the containment space for a longer time, which is conducive to the cooling of the emissions. This reduces the risk that the emissions will directly enter the exhaust channel after being discharged from the battery cell, resulting in poor cooling effect of the emissions.

[0076] According to some embodiments of this application, the accommodating space has a collection chamber for collecting emissions from the battery cells when the first pressure relief mechanism is actuated. An exhaust channel is connected to the collection chamber. The volume of the collection chamber is V, and the length of the exhaust channel is L2, satisfying 15L≤V≤270L and 0.2m≤L2≤20m.

[0077] If the collection chamber is too small, the exhaust will quickly fill it, causing a rapid increase in air pressure and potentially leading to pressure buildup and seal failure. Additionally, the exhaust will remain in the chamber for a short time, resulting in poor cooling. Conversely, if the collection chamber is too large, it will hold too much air, making it prone to mixing with the exhaust and potentially causing an explosion, also leading to seal failure.

[0078] By setting the volume of the collection chamber to be greater than or equal to 15L and less than or equal to 270L, the amount of air in the collection chamber is reduced while ensuring that the emissions remain in the collection chamber for a longer period of time and that the temperature can be reduced. This reduces the risk of emissions mixing with air and causing an explosion, as well as the risk of the chamber seal failing.

[0079] If the exhaust channel is too short, the emissions will remain in the channel for a short time, resulting in poor cooling and less deposition of solid particles. If the exhaust channel is too long, the emissions will remain in the channel for too long, preventing them from being quickly discharged from the enclosure, leading to internal pressure buildup and seal failure.

[0080] By setting the length of the exhaust channel to be greater than or equal to 0.2m and less than or equal to 20m, the exhaust can be quickly discharged to the outside of the box while ensuring that the exhaust has a longer residence time in the exhaust channel and is easy to cool down. This reduces the risk of the box failing to seal due to internal pressure buildup.

[0081] If the collection chamber is too large and the exhaust channel is too long, the emissions from the thermal runaway of the battery cells cannot be effectively and promptly discharged outside the enclosure, potentially causing excessive internal pressure and sealing failure. Conversely, if the collection chamber is too small and the exhaust channel is too short, the emissions from the thermal runaway of the battery cells cannot be effectively cooled before being discharged, resulting in significant environmental pollution. By setting the collection chamber volume to be greater than or equal to 15L and less than or equal to 270L, and setting the exhaust channel length to be greater than or equal to 0.2m and less than or equal to 20m, the temperature of the emissions upon discharge to the outside of the enclosure can be reduced, the solid particle content in the emissions can be lowered, and environmental pollution can be reduced. Simultaneously, this facilitates pressure relief within the enclosure, preventing airtightness failure due to excessive pressure and improving the reliability of the battery system.

[0082] According to some embodiments of this application, 30L≤V≤210L.

[0083] When V≥30L, the emissions from the battery cells can remain in the collection chamber for a longer period of time, resulting in better cooling of the emissions. When V≤210L, the risk of explosion caused by the mixing of high-temperature flue gas and air in the emissions is further reduced, as is the risk of failure of the enclosure seal.

[0084] According to some embodiments of this application, 2m≤L2≤15m.

[0085] When L2≥2m, the residence time of the emissions from the battery cells in the exhaust channel is longer, which helps to improve the cooling effect of the emissions; when L2≤15m, the emissions can be quickly discharged to the outside of the box, reducing the risk of box seal failure due to internal pressure buildup.

[0086] According to some embodiments of this application, the exhaust channel has multiple air inlets.

[0087] By setting multiple air inlets in the exhaust channel, it is possible for emissions to enter the exhaust channel from different locations, which facilitates the rapid discharge of emissions.

[0088] According to some embodiments of this application, the total area of ​​the plurality of air inlets of the exhaust channel is S3, and the area of ​​the first pressure relief mechanism is S4, satisfying that 0.1≤S3 / S4≤10.

[0089] If the total area of ​​the multiple air inlets in the exhaust passage is too small compared to the area of ​​the first pressure relief mechanism, the exhaust material is prone to blockage at the air inlets, resulting in poor exhaust flow, pressure buildup inside the enclosure, and ultimately, failure of the enclosure's seal. If the total area of ​​the multiple air inlets in the exhaust passage is too large compared to the area of ​​the first pressure relief mechanism, the exhaust material cannot be adequately cooled within the containment space and will quickly enter the exhaust passage, resulting in higher temperatures of the exhaust material discharged outside the enclosure.

[0090] By setting the ratio of the total area of ​​the multiple air inlets of the exhaust channel to the area of ​​the first pressure relief mechanism to be greater than or equal to 0.1 and less than or equal to 10, it is not only convenient for the exhaust to cool down in the containment space, but also for the exhaust to enter the exhaust channel in time and be discharged to the outside of the box, reducing the risk of the box seal failure caused by internal pressure buildup.

[0091] According to some embodiments of this application, 0.5 ≤ S3 / S4 ≤ 5.

[0092] When 0.5≤S2 / S3≤5, it further facilitates the cooling of the emissions within the containment space, further facilitates the timely entry of the emissions into the exhaust channel and their discharge to the outside of the enclosure, and reduces the risk of enclosure seal failure due to internal pressure buildup.

[0093] According to some embodiments of this application, 150mm 2≤S3≤3200mm 2 .

[0094] If the total area of ​​the multiple air inlets in the exhaust channel is too small, the exhaust material is prone to blockage at the air inlets, resulting in poor exhaust flow, excessive internal pressure, and failure of the seal. If the total area of ​​the multiple air inlets in the exhaust channel is too large, the exhaust material cannot be adequately cooled within the containment space and will quickly enter the exhaust channel, resulting in higher temperatures of the exhaust material discharged outside the box.

[0095] By setting the total area of ​​multiple air inlets in the exhaust channel to be greater than or equal to 150mm² 2 and less than or equal to 3200mm 2 This design allows the emissions to remain in the containment space for a longer period, facilitates cooling of the emissions within the collection chamber, and enables the emissions to enter the exhaust channel in a timely manner and be discharged to the outside of the box, reducing the risk of the box's seal failing due to internal pressure buildup.

[0096] According to some embodiments of this application, 200mm 2 ≤S3≤2200mm 2 .

[0097] When S3≥200mm 2 This further facilitates the timely entry of emissions into the exhaust channel and their discharge to the outside of the enclosure, reducing the risk of internal pressure buildup leading to enclosure seal failure; when S3≤2200mm 2 This further facilitates the longer residence time of emissions within the containment space, and also facilitates the cooling of emissions within the containment space.

[0098] According to some embodiments of this application, 100mm 2 ≤S4≤1500mm 2 .

[0099] If the area of ​​the first pressure relief mechanism is too small, and the total area of ​​the multiple air inlets in the exhaust channel is too large, the exhaust material cannot be sufficiently cooled within the containment space and will quickly enter the exhaust channel, resulting in a high temperature of the exhaust material discharged outside the enclosure. If the area of ​​the first pressure relief mechanism is too large, and the total area of ​​the multiple air inlets in the exhaust channel is too small, the exhaust material is prone to blockage at the air inlets, resulting in poor exhaust flow, pressure buildup inside the enclosure, and ultimately, failure of the enclosure seal.

[0100] By setting the area of ​​the first pressure relief mechanism to be greater than or equal to 100 mm² 2 and less than or equal to 1500mm 2This design allows emissions to remain in the containment space for a longer period, facilitates cooling of the emissions within the containment space, and enables the emissions to enter the exhaust channel in a timely manner and be discharged to the outside of the enclosure, reducing the risk of enclosure seal failure due to internal pressure buildup.

[0101] According to some embodiments of this application, 300mm 2 ≤S4≤1200mm 2 .

[0102] When S4≥300mm 2 This further facilitates a longer residence time of the emissions in the collection chamber, allowing the emissions to cool down within the chamber; when S4 ≤ 1200 mm 2 This further facilitates the timely entry of emissions into the exhaust channel and their discharge to the outside of the enclosure, reducing the risk of internal pressure buildup leading to enclosure seal failure.

[0103] Secondly, embodiments of this application also provide an electrical device, which includes a battery device according to any of the above embodiments, the battery device being used to provide electrical energy to the electrical device.

[0104] By adopting the battery device described above, it is possible to reduce emissions that pollute the environment and reduce the impact on electrical appliances and users.

[0105] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0106] 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.

[0107] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0108] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0109] Figure 3 is a schematic diagram of the minimum flow passage of the exhaust channel provided in some embodiments of this application;

[0110] Figure 4 is a schematic diagram of the minimum flow point of the exhaust channel provided in some other embodiments of this application;

[0111] Figure 5 is a schematic diagram of the first channel segment and the second channel segment provided in some embodiments of this application;

[0112] Figure 6 is a schematic diagram of the first channel segment and the second channel segment provided in some other embodiments of this application;

[0113] Figure 7 is a schematic diagram of the structure of the wall of the exhaust channel provided in some embodiments of this application;

[0114] Figure 8 is a structural schematic diagram of the box provided in some embodiments of this application;

[0115] Figure 9 is a schematic diagram of the assembly of the housing body and the exhaust pipe provided in some embodiments of this application;

[0116] Figure 10 is a schematic diagram of the structure of an exhaust pipe provided in some embodiments of this application;

[0117] Figure 11 is a schematic diagram of the structure of an exhaust pipe provided in some other embodiments of this application;

[0118] Figure 12 is a schematic diagram of the assembly of the housing body and the exhaust pipe provided in some other embodiments of this application;

[0119] Figure 13 is a schematic diagram of the assembly of the box body and protective components provided in some embodiments of this application;

[0120] Figure 14 is a schematic diagram of the structure of an exhaust pipe provided in some embodiments of this application;

[0121] Figure 15 is a schematic diagram of the assembly of the baffle component and the exhaust channel provided in some embodiments of this application;

[0122] Figure 16 is a schematic diagram of the assembly of the filter component and the exhaust channel provided in some embodiments of this application;

[0123] Figure 17 is a schematic diagram of the assembly of the adsorption component and the exhaust channel provided in some embodiments of this application;

[0124] Figure 18 is a schematic diagram of the assembly of the condenser and the exhaust channel provided in some embodiments of this application;

[0125] Figure 19 is a schematic diagram of the assembly of the phase change component and the exhaust channel provided in some embodiments of this application;

[0126] Figure 20 is a schematic diagram of the assembly of airtight components and exhaust channels provided in some embodiments of this application;

[0127] Figure 21 is a schematic diagram of the assembly of the airtight component and the exhaust channel provided in some other embodiments of this application.

[0128] The accompanying drawings are not drawn to scale.

[0129] Marking Explanation: 100 - Battery Unit; 10 - Battery Cell; 11 - First Pressure Relief Mechanism; 20 - Housing; 20a - Receiving Space; 20b - First Sub-Housing; 20c - Second Sub-Housing; 20d - Collection Chamber; 21 - Exhaust Channel; 21a - Air Inlet; 21b - Exhaust Outlet; 211 - First Channel Section; 212 - Second Channel Section; 213 - Pipe Connector; 22 - Frame; 23 - Housing Body; 24 - Exhaust Pipe; 241 - Pipe Section; 242-Expanding section; 25-Cover body; 26-Bottom wall; 31-Throttling component; 311-Gap; 32-Protective component; 321-Receiving cavity; 33-Break-flow component; 34-Filter component; 341-First filter screen; 342-Second filter screen; 35-Adsorption component; 36-Condensation component; 37-Phase change component; 41-Airtight component; 411-Sealing membrane; 412-Breathing valve; 200-Controller; 300-Motor; 1000-Vehicle. Detailed Implementation

[0130] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0131] 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 foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0132] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0137] 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.

[0138] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0139] 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.

[0140] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0141] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0142] As an example, the enclosure may include a first sub-enclosure and a second sub-enclosure. The first and second sub-enclosures are interlocked to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first sub-enclosure may be a top cover or a bottom plate.

[0143] 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.

[0144] 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.

[0145] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0146] 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.

[0147] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0148] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0149] 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.

[0150] 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.

[0151] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0152] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0153] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0154] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, or made of carbon, nickel, or titanium, etc.

[0155] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0156] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0157] 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.

[0158] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0159] 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.

[0160] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0161] In some implementations, the electrode assembly is a stacked structure.

[0162] 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.

[0163] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The casing may have one or more openings. The end cap may also be provided one or more times.

[0164] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal can be located on the end cap or on the housing.

[0165] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0166] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, it protects the electrode assembly and prevents leaks such as electrolyte leakage. When the housing is a non-sealed structure, it protects the electrode assembly, and a sealing bag may be included between the housing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film.

[0167] 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 batteries, such as hexagonal prismatic batteries.

[0168] The development of battery device technology must take into account multiple design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge rate. In addition, the environmental friendliness of the battery device under thermal runaway conditions must also be considered.

[0169] In some embodiments, the battery device includes a battery cell and a housing, with the battery cell housed within the housing's containment space. The battery cell has a first pressure relief mechanism, which, when activated, discharges emissions from the battery cell to release internal pressure. For example, in the event of thermal runaway of the battery cell, the first pressure relief mechanism activates to discharge high-temperature, high-pressure emissions from the battery cell. These emissions include flue gas containing solid particles such as Ni, Co, and Mn, and / or liquids. Typically, the emissions discharged by the first pressure relief mechanism are directly discharged to the outside of the housing via a pressure relief mechanism located within the housing to avoid internal pressure buildup and potential safety hazards. Since the emissions from the battery cell contain harmful substances and are at a high temperature, direct discharge of these emissions to the outside of the housing via the housing's pressure relief mechanism could easily cause environmental pollution.

[0170] In view of this, in order to address the environmental impact of emissions from battery devices under thermal runaway conditions, this application provides a battery device comprising a battery cell and a housing. The battery cell has a first pressure relief mechanism; the housing has a receiving space for accommodating the battery cell; wherein the housing also has an exhaust channel communicating with the receiving space, the exhaust channel being used to guide the emissions from the battery cell to be discharged outside the housing when the first pressure relief mechanism is actuated. The minimum flow area of ​​the exhaust channel is S1, and the area of ​​the air inlet of the exhaust channel is S2, satisfying 1.66 ≤ S2 / S1 ≤ 160, 10 mm. 2 ≤S1≤90mm 2 150mm 2 ≤S2≤3200mm 2 .

[0171] In such a battery device, when the first pressure relief mechanism is activated, the high-temperature and high-pressure material inside the battery cell is discharged outward from the actuation point as a discharge and enters the containment space. It undergoes preliminary cooling in the containment space and then enters the exhaust channel. During the flow through the exhaust channel, it is further cooled down and finally discharged out of the box through the exhaust port of the exhaust channel. When the discharge flows through the containment space and the exhaust channel, some solid particles in the discharge are deposited in the containment space and the exhaust channel due to gravity. Some gas in the discharge condenses and agglomerates into droplets, and some solid particles adhere to the droplets and remain in the containment space and the exhaust channel with the droplets. This reduces the content of solid particles and harmful substances in the discharge discharged to the outside of the box.

[0172] If the area of ​​the air inlet in the exhaust channel is too large compared to the minimum flow area of ​​the exhaust channel, the exhaust materials cannot be discharged quickly, resulting in excessive internal pressure and failure of the seal. If the area of ​​the air inlet in the exhaust channel is too small compared to the minimum flow area of ​​the exhaust channel, the exhaust materials flow too fast within the exhaust channel, have a short residence time, and experience poor cooling, resulting in excessively high temperatures of the exhaust materials discharged to the outside of the exhaust channel, polluting the environment.

[0173] By setting the ratio of the area of ​​the air inlet of the exhaust channel to the minimum flow area of ​​the exhaust channel to be greater than or equal to 1.66 and less than or equal to 160, the exhaust can be quickly discharged to the outside of the exhaust channel while ensuring that the exhaust has a longer residence time in the exhaust channel and is easy to cool down. This reduces the risk of the box seal failing due to internal pressure buildup.

[0174] If the air inlet area of ​​the exhaust channel is too small, it will be too small compared to the minimum flow area of ​​the exhaust channel. This will cause the exhaust to flow too quickly within the exhaust channel, resulting in a short residence time and poor cooling. Consequently, the exhaust will be discharged at a high temperature, polluting the environment. Conversely, if the air inlet area is too large, it will be too large compared to the minimum flow area of ​​the exhaust channel. This will prevent the exhaust from being discharged quickly, leading to excessive pressure buildup inside the enclosure and causing the enclosure seal to fail.

[0175] By setting the area of ​​the air intake in the exhaust channel to be greater than or equal to 150mm² 2 and less than or equal to 3200mm 2 Under the condition that the emissions have a long residence time in the exhaust channel and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel, reducing the risk of the box seal failure due to internal pressure buildup.

[0176] If the minimum flow area of ​​the exhaust channel is small, the area of ​​the air inlet will be too large compared to the minimum flow area. This prevents the exhaust from being discharged quickly, leading to excessive internal pressure and seal failure. Conversely, if the minimum flow area of ​​the exhaust channel is large, the area of ​​the air inlet will be too small compared to the minimum flow area. This results in excessively fast flow velocity of the exhaust within the channel, a short residence time, and poor cooling, leading to higher temperatures of the exhaust discharged and environmental pollution.

[0177] By setting the minimum flow area of ​​the exhaust channel to be greater than or equal to 10 mm 2 and less than or equal to 90mm2 Under the condition that the emissions have a long residence time in the exhaust channel and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel, reducing the risk of the box seal failure due to internal pressure buildup.

[0178] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

[0179] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0180] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0181] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0182] 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.

[0183] 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.

[0184] Please refer to Figures 2 to 4. Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application. Figure 3 is a structural schematic diagram of the minimum flow point of the exhaust channel provided in some embodiments of this application. Figure 4 is a structural schematic diagram of the minimum flow point of the exhaust channel provided in other embodiments of this application. This application provides a battery device 100, which includes a battery cell 10 and a housing 20. The battery cell 10 has a first pressure relief mechanism 11; the housing 20 has a receiving space 20a for accommodating the battery cell 10. The housing 20 also has an exhaust channel 21, which communicates with the receiving space 20a. The exhaust channel 21 is used to guide the discharge of the battery cell 10 to the outside of the housing 20 when the first pressure relief mechanism 11 is actuated. The minimum flow area of ​​the exhaust channel 21 is S1, and the area of ​​the air inlet 21a of the exhaust channel 21 is S2, satisfying 1.66≤S2 / S1≤160, 10mm. 2 ≤S1≤90mm 2 150mm 2 ≤S2≤3200mm 2 .

[0185] In the battery device 100, there can be multiple battery cells 10, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 10 are connected in both series and parallel configurations. Multiple battery cells 10 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 10 is housed within the housing 20. Alternatively, the battery device 100 can also consist of multiple battery cells 10 first connected in series, parallel, or in a mixed manner to form a battery cell assembly, and then these battery cell assemblies are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 20. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 10.

[0186] Among them, the battery cell 10 can be a secondary battery or a primary battery; the battery cell 10 can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery.

[0187] The first pressure relief mechanism 11 is an element or component that is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold. The first pressure relief mechanism 11 can take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell 10 reaches the predetermined threshold, the first pressure relief mechanism 11 performs an action or a weak structure provided in the first pressure relief mechanism 11 is destroyed, thereby forming an opening or channel for the release of internal pressure or temperature.

[0188] The term "actuation" as used in this application refers to the first pressure relief mechanism 11 being activated or reaching a certain state, thereby releasing the internal pressure and temperature of the battery cell 10. The action of the first pressure relief mechanism 11 may include, but is not limited to, at least a portion of the first pressure relief mechanism 11 rupturing, breaking, tearing, or opening, etc. When the first pressure relief mechanism 11 is actuated, the high-temperature, high-pressure substances inside the battery cell 10 are discharged outwards from the actuated portion as waste. In this way, the battery cell 10 can be depressurized and de-temperatureed under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0189] The emissions from the battery cell 10 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc. In this application, the composition of the emissions entering the exhaust channel 21 includes gas, a small amount of liquid and a small amount of solid particles. That is, the main component of the emissions is flue gas, and the flow velocity of the emissions can be understood as the flow velocity of the flue gas.

[0190] The housing 20 provides a receiving space 20a for the battery cell 10, and the housing 20 can adopt various structures. In some embodiments, the housing 20 may include a first sub-housing 20b and a second sub-housing 20c, the first sub-housing 20b and the second sub-housing 20c overlapping each other, and the first sub-housing 20b and the second sub-housing 20c together define the receiving space 20a for accommodating the battery cell 10. The second sub-housing 20c may be a hollow structure with one end open, and the first sub-housing 20b may be a plate-like structure, with the first sub-housing 20b covering the open side of the second sub-housing 20c, so that the first sub-housing 20b and the second sub-housing 20c together define the receiving space 20a; the first sub-housing 20b and the second sub-housing 20c may also be hollow structures with one side open, with the open side of the first sub-housing 20b covering the open side of the second sub-housing 20c.

[0191] In some embodiments, the first sub-box 20b can be a plate-like structure, and the second sub-box 20c can be a hollow structure with one end open. The first sub-box 20b covers the open side of the second sub-box 20c, so that the first sub-box 20b and the second sub-box 20c together define the accommodating space 20a.

[0192] The exhaust passage 21 is a passage for connecting the receiving space 20a and the outside of the housing 20. The exhaust passage 21 is used to guide the emissions of the battery cell 10 to the outside of the housing 20 when the first pressure relief mechanism 11 is actuated.

[0193] The flow area at the minimum point of the exhaust passage 21 is the minimum flow area of ​​the exhaust passage 21. For example, referring to Figure 3, the exhaust passage 21 has a variable diameter structure, and the flow area at the point where the flow area of ​​the exhaust passage 21 changes abruptly is the minimum flow area of ​​the exhaust passage 21. For another example, referring to Figure 4, the flow area of ​​the exhaust passage 21 can be reduced by setting a throttling component (such as a throttling element 31) in the exhaust passage 21, so that the flow area at the throttling component is the minimum flow area of ​​the exhaust passage 21.

[0194] The minimum flow area of ​​the exhaust channel 21 can be obtained by scanning the exhaust channel 21 with a CT scanning device (Computed Tomography Scan equipment). For specific test methods, please refer to the minimum flow area test method of the exhaust channel 21 at the end of this document.

[0195] In some embodiments, when there are multiple air inlets 21a in the exhaust channel 21, the area of ​​the air inlets 21a in the exhaust channel 21 is the sum of the areas of the multiple air inlets 21a.

[0196] In some embodiments, the area of ​​the air inlet 21a of the exhaust channel 21 can be obtained by a CCD camera (Charge Coupled Device camera, a digital camera with a charge-coupled device image sensor).

[0197] If the area of ​​the air inlet 21a of the exhaust channel 21 is too large compared to the minimum flow area of ​​the exhaust channel 21, the exhaust cannot be discharged quickly from the exhaust channel 21, resulting in excessive internal pressure in the housing 20 and failure of the housing 20's seal. If the area of ​​the air inlet 21a of the exhaust channel 21 is too small compared to the minimum flow area of ​​the exhaust channel 21, the exhaust flows too fast within the exhaust channel 21, the residence time of the exhaust within the exhaust channel 21 is too short, and the cooling effect of the exhaust within the exhaust channel 21 is poor, resulting in excessively high temperatures of the exhaust discharged to the outside of the exhaust channel 21, polluting the environment.

[0198] By setting the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 to be greater than or equal to 1.66 and less than or equal to 160, the exhaust can be quickly discharged to the outside of the exhaust channel 21 while ensuring that the exhaust has a long residence time in the exhaust channel 21 and is easy to cool down. This reduces the risk of the box 20 failing to seal due to internal pressure buildup.

[0199] In some embodiments, the ratio of the area of ​​the air inlet 21a of the exhaust passage 21 to the minimum flow area of ​​the exhaust passage 21 can be, but is not limited to, any one or any two of 1.66, 2.6, 6, 10, 43, 80, 120, 150 or 160.

[0200] If the area of ​​the air inlet 21a of the exhaust channel 21 is too small, the area of ​​the air inlet 21a of the exhaust channel 21 will be too small compared to the minimum flow area of ​​the exhaust channel 21. This will cause the exhaust materials to flow too fast within the exhaust channel 21, resulting in a short residence time and poor cooling effect. Consequently, the temperature of the exhaust materials discharged outside the exhaust channel 21 will be high, polluting the environment. Conversely, if the area of ​​the air inlet 21a of the exhaust channel 21 is too large, the area of ​​the air inlet 21a of the exhaust channel 21 will be too large compared to the minimum flow area of ​​the exhaust channel 21. This will prevent the exhaust materials from being discharged quickly from the exhaust channel 21, leading to excessive pressure buildup inside the housing 20 and causing the housing 20 to fail to seal.

[0201] By setting the area of ​​the air inlet 21a of the exhaust passage 21 to be greater than or equal to 150 mm² 2 and less than or equal to 3200mm 2 Under the condition that the emissions have a long residence time in the exhaust channel 21 and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0202] In some embodiments, the area of ​​the air inlet 21a of the exhaust channel 21 can be, but is not limited to, 150 mm². 2 200mm 2 350mm 2 500mm 2 550mm 2 700mm 2 900mm 2 1000mm 2 1200mm 2 1600mm 2 1800mm 2 2000mm 2 2200mm 2 2800mm 2 3000mm 2 Or 3200mm 2 The range between any one of them or any two of them.

[0203] If the minimum flow area of ​​the exhaust channel 21 is small, the area of ​​the air inlet 21a of the exhaust channel 21 will be too large compared to the minimum flow area of ​​the exhaust channel 21. This will prevent the exhaust materials from being discharged quickly from the exhaust channel 21, resulting in excessive internal pressure in the housing 20 and failure of the housing 20's seal. Conversely, if the minimum flow area of ​​the exhaust channel 21 is large, the area of ​​the air inlet 21a will be too small compared to the minimum flow area of ​​the exhaust channel 21. This will cause the exhaust materials to flow too quickly within the exhaust channel 21, resulting in a short residence time and poor cooling effect. Consequently, the temperature of the exhaust materials discharged from the exhaust channel 21 will be high, polluting the environment.

[0204] By setting the minimum flow area of ​​exhaust passage 21 to be greater than or equal to 10 mm 2 and less than or equal to 90mm 2 Under the condition that the emissions have a long residence time in the exhaust channel 21 and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0205] In some embodiments, the minimum flow area of ​​the exhaust passage 21 may be, but is not limited to, 10 mm. 2 15mm 2 20mm 2 25mm 2 30mm 2 35mm 2 40mm 2 45mm 2 50mm 2 55mm 2 60mm 2 65mm 2 70mm 2 75mm 2 80mm 2 85mm 2 Or 90mm 2 The range between any one of them or any two of them.

[0206] According to the battery device 100 of this application embodiment, when the first pressure relief mechanism 11 is actuated, the high-temperature and high-pressure material inside the battery cell 10 is discharged outward from the actuation part as a discharge and enters the containment space 20a. It undergoes preliminary cooling in the containment space 20a and then enters the exhaust channel 21. It is further cooled down during the flow through the exhaust channel 21 and is finally discharged outside the housing 20 through the exhaust port of the exhaust channel 21. When the discharge flows through the containment space 20a and the exhaust channel 21, some solid particles in the discharge are deposited in the containment space 20a and the exhaust channel 21 due to gravity. Some gas in the discharge condenses and agglomerates into droplets, and some solid particles adhere to the droplets and remain in the containment space 20a and the exhaust channel 21 with the droplets. This reduces the content of solid particles and harmful substances in the discharge discharged outside the housing 20.

[0207] According to some embodiments of this application, 6 ≤ S2 / S1 ≤ 43.

[0208] In some embodiments, S2 / S1 can be, but is not limited to, any one or any two of 6, 12, 15, 18, 24, 28, 31, 35, 38, 40 or 43.

[0209] When S2 / S1≥6, the emissions have a longer residence time in the exhaust channel 21, which facilitates the cooling of the emissions and results in lower temperatures of the emissions discharged to the outside of the exhaust channel 21. When S2 / S1≤43, the emissions can be discharged from the exhaust channel 21 quickly, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0210] Optionally, 8 ≤ S2 / S1 ≤ 35.

[0211] According to some embodiments of this application, 20mm 2 ≤S1≤60mm 2 .

[0212] In some embodiments, the minimum flow area of ​​the exhaust passage 21 may be, but is not limited to, 20 mm. 2 22mm 2 24mm 2 26mm 2 28mm 2 30mm 2 32mm 2 34mm 2 36mm 2 38mm 2 40mm 2 42mm 2 44mm 2 46mm 248mm 2 50mm 2 52mm 2 54mm 2 56mm 2 58mm 2 Or 60mm 2 The range between any one of them or any two of them.

[0213] When S1≥20mm 2 This further enables emissions to be quickly discharged from the exhaust channel 21, reducing the risk of seal failure of the housing 20 due to internal pressure buildup; when S1≤60mm 2 This further allows the emissions to have a longer residence time in the exhaust channel 21, which facilitates the cooling of the emissions, and the temperature of the emissions discharged to the outside of the exhaust channel 21 is relatively low.

[0214] Optionally, 30mm 2 ≤S1≤50mm 2 .

[0215] According to some embodiments of this application, 200mm 2 ≤S2≤2200mm 2 .

[0216] In some embodiments, the area of ​​the air inlet 21a of the exhaust channel 21 can be, but is not limited to, 200 mm². 2 300mm 2 400mm 2 500mm 2 600mm 2 700mm 2 800mm 2 900mm 2 1000mm 2 1100mm 2 1200mm 2 1300mm 2 1400mm 2 1500mm 2 1600mm 2 1700mm 2 1800mm 2 1900mm 2 2000mm 2 2100mm 2 Or 2200mm 2 The range between any one of them or any two of them.

[0217] When S2≥200mm 2This further allows the exhaust materials to have a longer residence time within the exhaust channel 21, facilitating cooling of the exhaust materials and resulting in lower temperatures of the exhaust materials discharged outside the exhaust channel 21; when S2 ≤ 2200 mm 2 This further enables the emissions to be quickly discharged from the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0218] Optional, 650mm 2 ≤S2≤1200mm 2 .

[0219] Referring to Figure 4, according to some embodiments of this application, the battery device 100 further includes a throttling element 31, which is disposed in the exhaust channel 21 and blocks the exhaust channel 21. The throttling element 31 is provided with a gap 311, and the flow area of ​​the gap 311 is the minimum flow area of ​​the exhaust channel 21.

[0220] The throttling element 31 can be connected to the wall of the exhaust passage 21. For example, the throttling element 31 can be interference-fitted with the wall of the exhaust passage 21, or the throttling element 31 can be connected to the exhaust passage 21 through other connecting parts.

[0221] In some embodiments, the slit 311 can be a narrow slit. When gas (such as flue gas) passes through the narrow slit, the flow cross-sectional area (flow area) becomes smaller. According to the law of conservation of mass, the flow velocity will increase because the mass of gas passing through per unit time is the same, but the smaller cross-sectional area leads to an increase in flow velocity.

[0222] By placing the throttling element 31 inside the exhaust passage 21, the gap 311 of the throttling element 31 forms the minimum flow area of ​​the exhaust passage 21, which facilitates increasing the flow velocity of the exhaust at the gap 311, thereby reducing the temperature of the exhaust.

[0223] According to some embodiments of this application, the minimum width of the gap 311 is H, which satisfies 0.1mm≤H≤1mm.

[0224] The minimum width of the gap 311 can be the minimum dimension on the flow cross section of the gap 311.

[0225] In some embodiments, the minimum width of the gap 311 can be, but is not limited to, any one or a range between any two of 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, or 1mm.

[0226] If the minimum width of the gap 311 is too small, the exhaust material will easily clog the gap 311, resulting in excessive internal pressure in the housing 20 and causing the housing 20 to fail to seal. If the minimum width of the gap 311 is too large, the exhaust material will stay in the exhaust channel 21 for a shorter time, resulting in poor cooling effect of the exhaust material in the exhaust channel 21 and a higher temperature of the exhaust material discharged to the outside of the exhaust channel 21.

[0227] By setting the minimum width of the gap 311 to be greater than or equal to 0.1 mm and less than or equal to 1 mm, it is not only convenient for the exhaust material to be quickly discharged to the outside of the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup, but also allows the exhaust material to have a longer residence time in the exhaust channel 21, which is conducive to the cooling of the exhaust material in the exhaust channel 21 and reduces the temperature of the exhaust material discharged to the outside of the exhaust channel 21.

[0228] According to some embodiments of this application, 0.3mm ≤ H ≤ 0.7mm.

[0229] In some embodiments, the minimum width of the gap 311 can be, but is not limited to, any one or a range between any two of 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, 0.6mm, 0.62mm, 0.64mm, 0.66mm, 0.68mm, or 0.7mm.

[0230] When H≥0.3mm, it further facilitates the rapid discharge of emissions to the outside of the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup; when H≤0.7mm, it further facilitates a longer residence time of emissions in the exhaust channel 21, which helps the emissions cool down in the exhaust channel 21 and reduces the temperature of the emissions discharged to the outside of the exhaust channel 21.

[0231] Optionally, 0.4mm ≤ H ≤ 0.6mm.

[0232] According to some embodiments of this application, the throttling element 31 is sealed to the wall of the exhaust passage 21.

[0233] In some embodiments, the throttling element 31 can be an elastic element, and the throttling element 31 can be interference-fitted with the wall of the exhaust passage 21 so that the throttling element 31 is sealed to the wall of the exhaust passage 21.

[0234] In some embodiments, a sealant may be provided between the throttling element 31 and the wall of the exhaust passage 21, and the throttling element 31 is sealed to the wall of the exhaust passage 21 by the sealant.

[0235] By sealing the throttling element 31 with the wall of the exhaust passage 21, the exhaust can only pass through the gap 311, so that the exhaust flows faster at the gap 311, which helps to reduce the temperature of the exhaust.

[0236] According to some embodiments of this application, there are multiple throttling elements 31, and the multiple throttling elements 31 are spaced apart along the extension direction of the exhaust passage 21.

[0237] For example, the number of throttling elements 31 can be two, three or more, and multiple throttling elements 31 can be arranged at equal intervals along the extension direction of the exhaust passage 21.

[0238] The throttling device 31 can be spaced apart from the air inlet 21a of the exhaust passage 21 so that the exhaust can quickly enter the exhaust passage 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0239] By arranging multiple throttling elements 31 at intervals along the extension direction of the exhaust passage 21, throttling of emissions can be achieved at multiple locations along the extension direction of the exhaust passage 21, which helps to reduce the temperature of the emissions.

[0240] Please refer to Figures 5 and 6. Figure 5 is a schematic diagram of the first and second channel segments provided in some embodiments of this application, and Figure 6 is a schematic diagram of the first and second channel segments provided in other embodiments of this application. According to some embodiments of this application, the exhaust channel 21 includes a first channel segment 211 and a second channel segment 212. The first channel segment 211 and the second channel segment 212 are connected by a pipe connector 213, and the flow area of ​​the second channel segment 212 is smaller than the flow area of ​​the first channel segment 211.

[0241] The first channel segment 211 and the second channel segment 212 can be two channel segments that constitute the exhaust channel 21. The flow area of ​​the exhaust channel 21 gradually decreases from the first channel segment 211 to the second channel segment 212.

[0242] In some embodiments, the flow area of ​​the second channel section 212 can be the minimum flow area of ​​the exhaust channel 21, or the throttling element 31 can be disposed in the second channel section 212.

[0243] In some embodiments, the throttling element 31 may also be disposed in the first channel segment 211.

[0244] The pipe fitting 213 can be a variable diameter structure, with the diameter of one end of the pipe fitting 213 being larger than the diameter of the other end, so that the pipe fitting 213 can be connected to the first channel section 211 and the second channel section 212.

[0245] In some embodiments, the first channel segment 211 and the second channel segment 212 are connected by a pipe connector 213. The first channel segment 211 and the second channel segment 212 can be set separately, which facilitates processing and manufacturing and allows for flexible assembly.

[0246] In some embodiments, the outer diameter of the wall constituting the first channel segment 211 may be equal to the outer diameter of the wall constituting the second channel segment 212, or the outer diameter of the wall constituting the first channel segment 211 may be greater than the outer diameter of the wall constituting the second channel segment 212.

[0247] By setting the flow area of ​​the second channel section 212 to be smaller than that of the first channel section 211, the residence time of the exhaust in the exhaust channel 21 can be increased, which makes it easier to reduce the temperature of the exhaust.

[0248] According to some embodiments of this application, the thermal conductivity of the wall of the exhaust channel 21 is greater than or equal to 30 W / (m·K).

[0249] Thermal conductivity refers to the amount of heat transferred through a 1-meter-thick material with a temperature difference of 1 degree (K, ℃) between its two surfaces in 1 second under stable heat transfer regulation.

[0250] In some embodiments, the thermal conductivity can be tested using the protective hot plate method, with the test performed using a protective hot plate thermal conductivity meter in accordance with the GB / T10294-2008 standard.

[0251] In some embodiments, the wall of the exhaust channel 21 can be made of metal, which has good thermal conductivity. For example, the wall of the exhaust channel 21 can be made of iron, aluminum, copper, etc.

[0252] In some embodiments, the thermal conductivity of the wall of the exhaust channel 21 can be, but is not limited to, any one or any two of 30 W / (m·K), 34.8 W / (m·K), 67 W / (m·K), 80 W / (m·K), 90 W / (m·K), 237 W / (m·K), 317 W / (m·K), 401 W / (m·K), or 429 W / (m·K).

[0253] If the thermal conductivity of the wall of the exhaust passage 21 is too small, the heat exchange effect between the exhaust and the wall of the exhaust passage 21 will be poor, and the cooling effect of the exhaust will be poor.

[0254] By setting the thermal conductivity of the exhaust channel 21 wall to be greater than or equal to 30 W / (m·K), the heat transfer between the exhaust and the exhaust channel 21 wall is better, the cooling effect of the exhaust is better, and it is easier to reduce the temperature of the exhaust.

[0255] According to some embodiments of this application, the thermal conductivity of the wall of the exhaust channel 21 is greater than or equal to 80 W / (m·K).

[0256] When the thermal conductivity of the wall of the exhaust channel 21 is greater than or equal to 80 W / (m·K), the heat transfer effect between the exhaust and the wall of the exhaust channel 21 is further improved, the cooling effect of the exhaust is better, and it is easier to reduce the temperature of the exhaust.

[0257] According to some embodiments of this application, the melting point of the wall of the exhaust channel 21 is greater than or equal to 80°C.

[0258] In some embodiments, the melting point of the wall of the exhaust channel 21 may be, but is not limited to, any one or any two of 80°C, 90°C, 100°C, 120°C, 150°C, 164°C, 170°C, 180°C, 220°C, 255°C, 280°C, 320°C, 660°C, 1000°C or 1083.4°C.

[0259] If the melting point of the wall of the exhaust channel 21 is too low, the wall of the exhaust channel 21 is easily broken by the high temperature of the exhaust material, causing the box 20 to fail to seal.

[0260] By setting the melting point of the wall of the exhaust channel 21 to be greater than or equal to 80°C, the risk of sealing failure of the housing 20 can be reduced, and the emissions can be cooled down in the exhaust channel 21.

[0261] According to some embodiments of this application, the melting point of the wall of the exhaust channel 21 is greater than or equal to 120°C.

[0262] When the melting point of the wall of the exhaust channel 21 is set to be greater than or equal to 120°C, the risk of sealing failure of the housing 20 can be further reduced, and the emissions can be cooled in the exhaust channel 21.

[0263] Please refer to Figure 7, which is a schematic diagram of the structure of the wall of the exhaust channel provided in some embodiments of this application. According to some embodiments of this application, the minimum thickness of the wall of the exhaust channel 21 is D, which satisfies 0.2mm≤D≤4mm.

[0264] The minimum thickness of the wall of the exhaust channel 21 refers to the minimum thickness of the wall surrounding the exhaust channel 21 in the radial direction. The minimum thickness of the wall of the exhaust channel 21 is measured by scanning the wall surrounding the exhaust channel 21 with a CT scanning device and measuring the minimum thickness of the wall of the exhaust channel 21 on the scan image.

[0265] In some embodiments, the minimum thickness of the wall of the exhaust channel 21 can be, but is not limited to, any one or any two of 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm or 4mm.

[0266] If the minimum thickness of the wall of the exhaust passage 21 is too small, the wall of the exhaust passage 21 is easily broken by the high-temperature exhaust material, causing the seal of the housing 20 to fail. If the minimum thickness of the wall of the exhaust passage 21 is too large, the heat exchange effect between the exhaust material and the exhaust passage 21 will be poor, and the cooling effect of the exhaust material will be poor.

[0267] By setting the minimum thickness of the wall of the exhaust channel 21 to be greater than or equal to 0.2 mm and less than or equal to 4 mm, the heat transfer effect between the exhaust and the wall of the exhaust channel 21 is better, and the weight of the box 20 can be designed to be lighter, provided that the wall of the exhaust channel 21 is not easily broken by the exhaust.

[0268] According to some embodiments of this application, 0.8mm ≤ D ≤ 3mm.

[0269] When D≥0.8mm, the risk of the exhaust channel 21 wall being breached by the exhaust material is further reduced; when D≤3mm, the heat transfer effect between the exhaust material and the exhaust channel 21 wall is further improved, which makes it easier to reduce the temperature of the exhaust material. At the same time, the weight of the housing 20 can be designed to be lighter.

[0270] Optionally, 1.2mm≤D≤2.6mm.

[0271] Referring to Figure 2, according to some embodiments of this application, the housing 20 includes a frame 22, the interior of which is hollow to form at least a partial exhaust channel 21.

[0272] The box 20 also includes a cover 25 and a bottom wall 26, which together form a receiving space 20a.

[0273] The frame 22 has a hollow structure, and the internal space of the frame 22 forms at least part of the exhaust channel 21.

[0274] In some embodiments, the frame 22 can be a one-piece molded structure, for example, the frame 22 can be a one-piece extruded molded structure.

[0275] In some embodiments, the frame 22 may be made of metal, such as steel, aluminum alloy, etc.

[0276] By forming the exhaust channel 21 inside the frame 22, the space occupied can be reduced and the space utilization rate can be improved, so that the battery device 100 can have a high energy density.

[0277] Please refer to Figure 8, which is a structural schematic diagram of a housing provided in some embodiments of this application. According to some embodiments of this application, the exhaust channel 21 extends circumferentially along the frame 22.

[0278] The exhaust passage 21 is provided on multiple walls of the frame 22. The exhaust passage 21 extends circumferentially along the frame 22. Please refer to Figure 8. When there are multiple air inlets 21a of the exhaust passage 21, the multiple air inlets 21a can be provided on different walls of the frame 22 so that the exhaust can enter the exhaust passage 21 in a timely manner.

[0279] In some embodiments, the exhaust passage 21 has a corner, which may be located at the junction of two adjacent walls of the frame 22, so as to reduce the temperature of the exhaust as it flows within the exhaust passage 21 and to facilitate the deposition of solid particles in the exhaust.

[0280] In some embodiments, the exhaust channel 21 may be arranged in a spiral shape along the circumference of the frame 22, that is, the exhaust channel 21 may be arranged around the circumference of the frame 22 multiple times, so that the exhaust channel 21 has a longer length.

[0281] By extending the exhaust passage 21 circumferentially along the frame 22, the exhaust passage 21 can have a longer length, which facilitates the cooling of the exhaust material within the exhaust passage 21.

[0282] According to some embodiments of this application, the exhaust channel 21 has multiple corners, and the exhaust channel 21 has corners on the wall of each housing 20, which is conducive to the deposition of solid particles in the emissions and the cooling of the emissions.

[0283] Please refer to Figure 9, which is a schematic diagram of the assembly of the housing body and the exhaust pipe provided in some embodiments of this application. According to some embodiments of this application, the housing 20 includes a housing body 23 and an exhaust pipe 24. The accommodating space 20a is disposed inside the housing body 23, and the exhaust pipe 24 is connected to the housing body 23. An exhaust channel 21 is formed inside the exhaust pipe 24.

[0284] The box body 23 has a hollow structure, and the box body 23 encloses the accommodating space 20a.

[0285] The exhaust pipe 24 can be located inside the housing body 23 and can be connected to the inner surface of the housing body 23; the exhaust pipe 24 can also be located outside the housing body 23 and can be connected to the outer surface of the housing body 23.

[0286] The housing body 23 may be provided with a through hole, which connects the inside and outside of the housing body 23, and the exhaust pipe 24 is connected to the through hole.

[0287] In some embodiments, when the exhaust pipe 24 is disposed inside the housing body 23, the air inlet end of the exhaust pipe 24 is connected to the accommodating space 20a, and the exhaust end of the exhaust pipe 24 is connected to the through hole of the housing body 23.

[0288] The exhaust pipe 24 can be connected to the housing body 23 in various ways, such as welding connection, snap-fit ​​connection, threaded connection, etc.

[0289] In some embodiments, the exhaust pipe 24 can be a one-piece structure, or the exhaust pipe 24 can be a multi-segment split structure connected as one piece.

[0290] In some embodiments, the exhaust pipe 24 may be made of non-metallic materials, such as polypropylene, polycarbonate, polyethylene terephthalate, etc.; the exhaust pipe 24 may also be made of metallic materials, such as aluminum, copper, aluminum alloy, steel, etc.

[0291] By forming an exhaust channel 21 inside the exhaust pipe 24, the exhaust pipe 24 and the housing body 23 can be set separately, which is convenient for processing and manufacturing.

[0292] According to some embodiments of this application, the exhaust pipe 24 has at least one corner. A corner refers to an angle or bend formed when the exhaust pipe 24 changes direction in a layout, typically used to connect two pipe segments or to redirect the exhaust pipe 24. The corner can change the flow direction of the fluid (emissions from the battery cell 10) inside the exhaust pipe 24.

[0293] After the emissions enter the exhaust pipe 24, the flow direction is changed by the guide and bends of the exhaust pipe 24, increasing the flow path of the flue gas within the exhaust pipe 24, buffering the flow velocity of the flue gas, and increasing the contact time between the flue gas and the pipe wall of the exhaust pipe 24. This facilitates heat exchange between the flue gas and the exhaust pipe 24, and makes it easier for water vapor to condense into condensate on the pipe wall of the exhaust pipe 24. At the same time, solid particles in the emissions will deposit during the flow within the exhaust pipe 24, resulting in a lower concentration of flue gas discharged from the exhaust pipe 24.

[0294] According to some embodiments of this application, the number of corners is greater than or equal to 4.

[0295] For example, taking the box 20 as a cuboid, when the length of the exhaust pipe 24 is relatively long, the exhaust pipe 24 can be arranged around the four walls of the box 20 along the circumference of the box 20. The number of corners of the exhaust pipe 24 can be 4, which is simple in structure and easy to process and manufacture.

[0296] For example, when the length of the exhaust pipe 24 is short, the number of bends needs to be designed to be more, such as more than 20, so that the exhaust gas has a longer flow path in the exhaust pipe 24, which facilitates the condensation of flue gas or the deposition of solid particles in the exhaust gas, thereby reducing the temperature and concentration of the exhaust gas.

[0297] By ensuring that the number of corners is greater than or equal to four, the emissions collide multiple times with the wall of the exhaust pipe 24, reducing the temperature of the flue gas and allowing solid particles to deposit within the exhaust pipe 24, thus minimizing environmental pollution from emissions discharged through the exhaust pipe 24. For example, when the exhaust pipe 24 has four corners, these four corners can correspond to the four corners of the cuboid-shaped housing 20. The exhaust pipe 24 can then be routed around the cuboid-shaped housing 20, resulting in a longer flow path for the emissions. The emissions passing through the four corners facilitates temperature reduction in the flue gas and solid particle deposition.

[0298] Please refer to Figure 9 and further to Figure 10, which is a schematic diagram of the structure of an exhaust pipe provided in some embodiments of this application. According to some embodiments of this application, the housing body 23 includes a frame 22, and the exhaust pipe 24 is spirally arranged along the circumference of the frame 22. For example, the exhaust pipe 24 is disposed within the space enclosed by the frame 22 and connected to the inner surface of the frame 22.

[0299] The exhaust pipe 24 is spirally arranged around the circumference of the frame 22, and the exhaust pipe 24 is arranged in multiple turns around the circumference of the frame 22 so that the length of the exhaust pipe 24 is relatively long.

[0300] In some embodiments, when the exhaust pipe 24 is arranged in a spiral shape along the circumference of the frame 22, the exhaust pipe 24 may have a corner at the corner of the frame 22, or the exhaust pipe 24 may have a rounded transition at the corner of the frame 22.

[0301] In some embodiments, multiple battery cells 10 constitute a battery cell assembly, and an exhaust pipe 24 may be arranged around the battery cell assembly to reduce the risk of interference between the exhaust pipe 24 and the battery cell assembly and to facilitate the assembly of the exhaust pipe 24.

[0302] By spiraling the exhaust pipe 24 along the circumference of the frame 22, the exhaust pipe 24 has a relatively long length and can have multiple bends, which facilitates the reduction of the temperature of the emissions and the reduction of the smoke concentration.

[0303] Please refer to Figure 11, which is a schematic diagram of the structure of an exhaust pipe provided in some other embodiments of this application. According to some embodiments of this application, the exhaust pipe 24 has at least one enlarged diameter portion 242. The enlarged diameter portion 242 can be understood as a portion in the extending direction of the exhaust pipe 24 where the cross-sectional area of ​​the exhaust passage 21 is increased. For example, the inner diameter and outer diameter of the exhaust pipe 24 are increased simultaneously at the enlarged diameter portion 242.

[0304] In some embodiments, the exhaust pipe 24 may include a plurality of pipe segments 241, a portion of which have the same and smaller cross-sectional area, and another portion of which may be an enlarged section 242, which connects two pipe segments 241 with smaller cross-sectional areas.

[0305] In the above scheme, the expansion section 242 can be regarded as the part where the cross-sectional area of ​​the exhaust channel 21 inside the exhaust pipe 24 increases. After the emission material enters the expansion section 242 from the small diameter area, the flow rate of the emission material slows down and the temperature of the flue gas decreases. The liquid after the flue gas condenses and the solid particles in the flue gas can settle in the expansion section 242 to achieve the effect of reducing the flue gas temperature and the flue gas concentration.

[0306] Please refer to Figure 12, which is a schematic diagram of the assembly of the housing body and the exhaust pipe according to some embodiments of this application. According to some embodiments of this application, the exhaust pipe 24 is located outside the housing body 23, and one end of the exhaust pipe 24 is connected to the housing body 23.

[0307] In some embodiments, the housing body 23 is provided with a through hole, the air inlet end of the exhaust pipe 24 can be connected to the outer surface of the housing body 23, and the air inlet end of the exhaust pipe 24 communicates with the through hole, so that the emissions in the accommodating space 20a can be discharged to the outside of the housing 20 through the exhaust pipe 24.

[0308] By placing the exhaust pipe 24 outside the housing body 23, the space utilization inside the housing body 23 is improved.

[0309] Please refer to Figure 13, which is a schematic diagram of the assembly of the housing body and the protective component provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a protective component 32, which is located outside the housing body 23 and connected to the housing body 23. The protective component 32 and the housing body 23 form a receiving cavity 321, and at least a portion of the exhaust pipe 24 is disposed within the receiving cavity 321.

[0310] The protective component 32 is a component used to shield the exhaust pipe 24. The protective component 32 is disposed outside the housing body 23 so as to cooperate with the housing body 23 to form a receiving cavity 321 for accommodating the exhaust pipe 24.

[0311] In some embodiments, the protective member 32 can be detachably connected to the housing body 23, for example, by snap-fitting or threading the protective member 32 to the housing body 23, so as to facilitate maintenance or replacement of the exhaust pipe 24.

[0312] The protective component 32 can be made of metal, such as aluminum, aluminum alloy, steel, etc.; the protective component 32 can also be made of non-metal, such as plastic, rubber, etc.

[0313] In the above scheme, the protective component 32 and the housing body 23 form a receiving cavity 321, and at least a portion of the exhaust pipe 24 is disposed in the receiving cavity 321 in order to protect the exhaust pipe 24 and reduce the risk of damage to the exhaust pipe 24.

[0314] Please refer to Figure 14, which is a schematic diagram of the structure of an exhaust pipe provided in some embodiments of this application. According to some embodiments of this application, the exhaust pipe 24 includes a plurality of pipe segments 241 connected in sequence, and the melting point of the plurality of pipe segments 241 decreases sequentially along the flow direction of the exhaust.

[0315] Multiple pipe segments 241 are multiple parts of the exhaust pipe 24 distributed along its extension direction. The multiple pipe segments 241 are set separately and connected sequentially along the extension direction of the exhaust pipe 24.

[0316] The melting points of the multiple pipe sections 241 are different. According to the melting point, the melting point of the multiple pipe sections 241 gradually decreases from the air inlet 21a to the exhaust outlet of the exhaust pipe 24.

[0317] By making the melting point of multiple pipe sections 241 decrease sequentially, the exhaust pipe 24 can be made of different materials, which helps to reduce manufacturing costs.

[0318] Please refer to Figure 15, which is a schematic diagram of the assembly of a baffle component and an exhaust channel according to some embodiments of this application. According to some embodiments of this application, a baffle component 33 is provided in the exhaust channel 21, and the baffle component 33 is used to change the flow path of the exhaust material in the exhaust channel 21.

[0319] The turbulence-disrupting component 33 can be a component installed in the exhaust channel 21. When the exhaust material passes through the turbulence-disrupting component 33, a portion of the exhaust material will condense. At the same time, the flow path of the exhaust material changes, which is beneficial for the exhaust material to cool down in the exhaust channel 21.

[0320] In some embodiments, the number of baffles 33 can be multiple, and the multiple baffles 33 can be spaced apart along the extension direction of the exhaust passage 21.

[0321] In some embodiments, the baffle 33 may be disposed between the air inlet 21a and the exhaust outlet of the exhaust passage 21.

[0322] By placing the turbulence-disrupting component 33 inside the exhaust passage 21, the flow path of the exhaust material inside the exhaust passage 21 can be changed, which facilitates the reduction of the temperature of the exhaust material.

[0323] In some embodiments, the turbulence member 33 is connected to the wall of the exhaust channel 21, and the turbulence member 33 has a first end face that is spaced apart from the wall of the exhaust channel 21.

[0324] The turbulence-disrupting component 33 is connected to the inner wall of the exhaust channel 21. The turbulence-disrupting component 33 has a first end face. The first end face is spaced apart from the wall of the exhaust channel 21, so that there is an exhaust gap between the first end face and the wall of the exhaust channel 21, or the first end face itself surrounds to form an exhaust gap, so that the exhaust in the exhaust channel 21 can flow from one side of the turbulence-disrupting component 33 to the other side through the exhaust channel 21.

[0325] Optionally, the flow-deflecting component 33 can be any suitable structural form, and the first end face of the flow-deflecting component 33 can be straight, columnar, or arc-shaped, etc. If the first end face is spaced apart from the wall of the exhaust channel 21, the fluid can flow through the exhaust gap on the side of the first end face.

[0326] In some embodiments, the turbulence member 33 includes a rough portion disposed on the wall of the exhaust channel 21, and the surface of the rough portion is irregular.

[0327] Optionally, the entire surface of the wall of the exhaust channel 21 may be roughened, or a portion of the wall of the exhaust channel 21 may be roughened.

[0328] The surface of the rough part is uneven, with protrusions and pits. This helps to increase the surface area of ​​the exhaust passage 21 wall, thereby increasing the contact area between the exhaust and the exhaust passage 21 wall.

[0329] Furthermore, when the exhaust flows through the rough section, it will collide with the protrusions of the rough section and change its flow direction. This helps to increase the residence time of the exhaust in the exhaust channel 21 and increase the contact area between the exhaust and the inner wall of the exhaust channel 21, thereby increasing the condensation efficiency of the exhaust.

[0330] Please refer to Figure 16, which is a schematic diagram of the assembly of a filter component and an exhaust channel provided in some embodiments of this application. According to some embodiments of this application, a filter component 34 is provided in the exhaust channel 21, and the filter component 34 is used to filter solid particles in the emissions in the exhaust channel 21.

[0331] The filter element 34 can be a porous structure, such as a filter screen, filter fabric or filter paper, which allows gas to pass through while filtering solid particles.

[0332] In some embodiments, the filter element 34 may be detachably connected to the wall of the exhaust channel 21, for example, by snap-fit, threaded connection, etc.

[0333] In some embodiments, the filter element 34 may be disposed at the air inlet 21a of the exhaust channel 21, or the filter element 34 may be disposed at the exhaust outlet 21b of the exhaust channel 21, or the filter element 34 may be disposed between the air inlet 21a and the exhaust outlet 21b of the exhaust channel 21.

[0334] Optionally, the filter element 34 is disposed between the air inlet 21a and the exhaust outlet 21b of the exhaust passage 21.

[0335] By placing the filter element 34 inside the exhaust channel 21, solid particles in the emissions can be filtered, thereby reducing the pollution of the emissions to the environment.

[0336] In some embodiments, the number of filter elements 34 may be at least two, and the at least two filter elements 34 are spaced apart along the extension direction of the exhaust passage 21.

[0337] When at least two filter elements 34 are spaced apart along the extension direction of the exhaust channel 21, the exhaust material flows through each filter element 34 sequentially as it passes through the exhaust channel 21. Since the filter elements 34 are configured to filter at least a portion of the solid particles in the exhaust material, some solid particles are blocked by each filter element 34 and remain within the exhaust channel 21 as the exhaust material flows through it. The particle size of the solid particles filtered by different filter elements 34 varies. For example, along the extension direction of the exhaust channel 21, the filter element 34 closer to the exhaust port 21b of the exhaust channel 21 filters out smaller particles. In this way, as the exhaust material flows through multiple filter elements 34 sequentially, the particle size of the solid particles filtered out by the filter elements 34 becomes increasingly smaller, which helps reduce the risk of the filter elements 34 becoming clogged.

[0338] The solid particles in the emissions typically contain electrolyte, electrode assembly debris, etc., and these solid particles usually contain a lot of harmful substances. By using the filter element 34 to retain at least some of the solid particles in the emissions within the exhaust channel 21, it is beneficial to reduce the concentration of flue gas and the content of harmful substances in the emissions emitted to the external environment of the battery device 100.

[0339] Referring to Figure 16, in some embodiments, at least two filter components 34 include a first filter screen 341 and a second filter screen 342. Along the extending direction of the exhaust channel 21, the first filter screen 341 is disposed on the side of the second filter screen 342 near the exhaust port 21b of the exhaust channel 21, and the mesh count of the first filter screen 341 is greater than that of the second filter screen 342.

[0340] The materials of the first filter screen 341 and the second filter screen 342 can be metal materials such as steel, or the materials of the first filter screen 341 and the second filter screen 342 can be high-temperature resistant plastics or fabrics, etc.

[0341] The first filter screen 341 and the second filter screen 342 have simple structures, and the particle size of the solid particles filtered by the first filter screen 341 and the second filter screen 342 can be controlled by controlling the mesh size of the first filter screen 341 and the second filter screen 342, so as to filter the solid particles in the discharge step by step.

[0342] "Mesh count" can refer to the number of pores in a filter per unit area, such as 1 square inch. If the mesh count of the first filter 341 is greater than that of the second filter 342, then the number of pores in the first filter 341 per unit area is greater than that in the second filter 342. The average pore size of the first filter 341 is smaller than that of the second filter 342. Thus, the particle size of the solid particles filtered out by the first filter 341 is smaller than that of the solid particles filtered out by the second filter 342.

[0343] The first filter screen 341 is located on the side of the second filter screen 342 that is close to the second pressure relief mechanism along the extension direction of the exhaust channel 21. After the exhaust flow enters the exhaust channel 21, it will first flow through the second filter screen 342, where larger solid particles will be filtered out. Then it will flow to the first filter screen 341, where smaller particles will be filtered out. This step-by-step filtration helps to increase the amount of solid particles filtered out in the exhaust and reduces the risk of a large number of particles being filtered out by a single filter screen, causing particles to accumulate at the filter screen and thus clogging the exhaust channel 21.

[0344] Optionally, the first filter 341 and the second filter 342 can be arranged adjacent to each other, or other filters can be arranged between the first filter 341 and the second filter 342.

[0345] Please refer to Figure 17, which is a schematic diagram of the assembly of the adsorption component and the exhaust channel provided in some embodiments of this application. According to some embodiments of this application, an adsorption component 35 is provided in the exhaust channel 21, and the adsorption component 35 is used to adsorb solid particles and / or liquids of the emissions in the exhaust channel 21.

[0346] In some embodiments, the adsorption component 35 may include at least one of activated carbon filter cotton, activated carbon filter mesh, and honeycomb ceramic filter material.

[0347] In some embodiments, the adsorption component 35 may be disposed at the air inlet 21a of the exhaust channel 21, or the adsorption component 35 may be disposed at the exhaust outlet 21b of the exhaust channel 21, or the adsorption component 35 may be disposed between the air inlet 21a and the exhaust outlet 21b of the exhaust channel 21.

[0348] Optionally, the adsorption component 35 is disposed between the air inlet 21a and the exhaust port 21b of the exhaust channel 21.

[0349] In some embodiments, the adsorption component 35 may be detachably connected to the wall of the exhaust channel 21, for example, by snap-fit, threaded connection, etc.

[0350] By placing the adsorption component 35 within the exhaust channel 21, it is possible to adsorb solid particles and / or liquids in the emissions, thereby reducing the pollution of the emissions to the environment.

[0351] Please refer to Figure 18, which is a schematic diagram of the assembly of the condenser and the exhaust channel provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a condenser 36, which is disposed in the exhaust channel 21. The condenser 36 includes condensation nuclei particles, which are used to condense and agglomerate small droplets and harmful substances in the emissions.

[0352] The condensation nucleus particles can be solid particles that play a role in condensation and agglomeration. After the emissions enter the exhaust channel 21, the emissions come into contact with the condensation nucleus particles. When the vaporous droplets in the emissions encounter the condensation nucleus particles, they can condense and agglomerate into water droplets. Since some of the harmful substances in the emissions are solutes that dissolve in the droplets, during the droplet condensation process, the harmful substances in the emissions will also be retained in the exhaust channel 21 along with the droplets.

[0353] The condensation nuclei can include a variety of chemical substances, as long as they can play a condensation role within the exhaust channel 21.

[0354] When the condenser 36 is disposed in the exhaust channel 21, the condenser 36 can be attached to the wall of the exhaust channel 21, or the condenser 36 can be disposed in the relevant structure within the exhaust channel 21.

[0355] By setting a condenser 36 in the exhaust channel 21, and the condenser 36 including condensation nuclei particles, when the exhaust material passes through the exhaust channel 21, small droplets and harmful substances in the exhaust material will condense and agglomerate when they encounter the condensation nuclei particles, and settle and remain inside the exhaust channel 21. This helps to reduce the content of harmful substances discharged into the environment in the event of thermal runaway of the battery device 100, and thus helps to reduce the pollution to the environment in the event of thermal runaway of the battery device 100.

[0356] In some embodiments, the particle size d of the condensation nuclei satisfies: 0.1 μm ≤ d ≤ 30 μm.

[0357] Optionally, the condensation nucleus particles can be spherical, ellipsoidal, or other irregular shapes. The particle size d of the condensation nucleus particles may not be the absolute particle size. For non-spherical condensation nucleus particles, the particle size can be the equivalent diameter of a sphere with the same volume, which can be measured based on the scattered light signal.

[0358] The measurement method for the particle size d of condensation nuclei can be carried out with reference to relevant standards, such as GB / T 29022-2021 "Dynamic Light Scattering Method (DLS) for Particle Size Analysis" and GB / T 44223-2024 "Technical Requirements for Particle Size Analyzers Using Dynamic Light Scattering Method for Nanotechnology".

[0359] Optionally, the method for measuring the scattered light signal may include: a laser beam passing through condensation nuclei particles, the direction and intensity of the scattered light being related to the particle size of the condensation nuclei particles, the direction of the scattered light from larger particles being closer to the straight line direction of the scattering source, and the scattered light from smaller particles being more perpendicular to the direction of the incident light, the scattered light being received by a series of detectors (usually distributed at different angles) and converted into electrical signals, and the intensity of the scattered light received at different angles being converted into particle size distribution information through a specific algorithm.

[0360] Alternatively, the particle diameter d of the condensation core particles may be 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm or 30μm, etc.

[0361] It is understandable that the smaller the particle size of the condensation nucleus particles, the higher their efficiency as nuclei during droplet condensation; that is, the higher the condensation efficiency of the condensation nucleus particles. It should be noted that the condensation efficiency here can be considered as the ratio of the mass of the collected liquid after condensation to the total mass passing through the exhaust channel 21 where the condensation nucleus particles are located. Conversely, the larger the particle size of the condensation nucleus particles, the larger the surface area they can provide for droplet condensation.

[0362] By setting the particle size d of the condensation nuclei to satisfy 0.1μm≤d≤30μm, it is beneficial to increase the surface area of ​​the condensation nuclei for condensing emissions, and also to enhance the role of the condensation nuclei as a core in the emission condensation process, thereby improving the condensation efficiency of the condensation nuclei.

[0363] In some embodiments, the particle size d of the condensation nuclei satisfies: 2μm≤d≤10μm.

[0364] In some embodiments, the material of the condensate nuclei may include phosphate esters, carbonates, phosphates, carbonates, or sulfonates.

[0365] In the event of thermal runaway of battery cell 10, the main component of other substances emitted with the flue gas is the electrolyte. Since the main components of the electrolyte solute are carbonates or phosphates, as well as carbonates, phosphates, and sulfonates, according to the principle of "like dissolves like," the material of the condensation nucleus particles is set to phosphates, carbonates, phosphates, carbonates, or sulfonates. The condensation nucleus particles have higher chemical stability, can stably provide condensation function for a long time, and are conducive to improving the chemical affinity between the condensation nucleus particles and the emissions. The condensation nucleus particles have better molecular recognition and adsorption capacity for the emissions, enhance droplet formation, and accelerate the droplet condensation process.

[0366] In addition, the chemical composition of condensation nuclei is similar to that of emissions, which enhances their compatibility. This helps reduce the interfacial tension between condensation nuclei and emissions, promotes liquid phase transfer, and reduces the nucleation potential energy barrier. It also helps promote the contact and interaction between emissions and condensation nuclei, increases the probability of emissions nucleating on condensation nuclei, and accelerates the condensation process.

[0367] Furthermore, since the composition of the condensate nuclei is similar to that of the recovered emissions, it can reduce the complexity and processing costs of subsequent separation and purification steps, and make it easier to process the recovered mixture, so as to facilitate the extraction of pure recovered materials for recycling.

[0368] Therefore, setting the material of the condensation nuclei particles to phosphate esters, carbonates, phosphates, carbonates, or sulfonates is beneficial to increasing the condensation rate of emissions, accelerating the condensation process of emissions, and improving the stability of the condensation nuclei particles so that they can stably provide condensation over a long period of time. It also helps to reduce the subsequent treatment costs of condensation nuclei particles and emissions, and facilitates the recycling of condensation nuclei particles.

[0369] In some embodiments, the condenser 36 includes a nucleus coating comprising a plurality of nucleus particles, the nucleus coating being disposed on the wall of the exhaust passage 21.

[0370] In some embodiments, the melting point of the condenser 36 is ≥1000°C.

[0371] Optionally, the melting point of the solidified component 36 can be 1000℃, 1100℃, 1200℃, 1300℃, 1400℃, 1500℃ or 1600℃, etc.

[0372] Understandably, in the event of thermal runaway of the battery device 100, the temperature of the flue gas generated by the battery device 100 is usually below 1000°C. Setting the melting point of the condenser 36 to ≥1000°C helps reduce the risk of the condenser 36 melting at high temperatures, thereby improving the reliability of the condensate emissions from the condenser 36.

[0373] Please refer to Figure 19, which is a schematic diagram of the assembly of the phase change element and the exhaust channel provided in some embodiments of this application. In some embodiments, the battery device 100 further includes a phase change element 37, which is disposed within the exhaust channel 21.

[0374] The phase change element 37 can be any substance capable of absorbing heat and undergoing a state change. The phase change element 37 can be solid at room temperature and transform into a liquid state after absorbing heat. Alternatively, the phase change element 37 can be liquid at room temperature and transform into a gaseous state after absorbing heat.

[0375] As the emissions flow through the phase change element 37 in the exhaust channel 21, the phase change element 37 can absorb heat from the emissions by changing its state, thereby reducing the heat in the emissions and making it easier for the gas in the emissions to condense into droplets.

[0376] In some embodiments, phase change element 37 may include at least one of paraffin and hydrated salt.

[0377] Please refer to Figures 20 and 21. Figure 20 is a schematic diagram of the assembly of an airtight component and an exhaust channel provided in some embodiments of this application, and Figure 21 is a schematic diagram of the assembly of an airtight component and an exhaust channel provided in other embodiments of this application. According to some embodiments of this application, the battery device 100 further includes an airtight component 41, which is disposed in the exhaust channel 21 and is used to seal the accommodating space 20a.

[0378] The airtight component 41 is a component used to seal the containment space 20a. Here, sealing the containment space 20a means that the exhaust passage 21 is sealed by the airtight component 41 so that the containment space 20a cannot communicate with the outside through the exhaust passage 21.

[0379] The airtight component 41 can be installed at the air inlet 21a of the exhaust channel 21, or the airtight component 41 can be installed at the exhaust outlet 21b of the exhaust channel 21. The airtight component 41 is connected to the wall of the exhaust channel 21 to isolate the accommodating space 20a from the outside of the box 20.

[0380] By placing the airtight component 41 in the exhaust channel 21, the airtight component 41 can seal the containment space 20a, thereby reducing the risk of external impurities (such as dust, water, etc.) entering the containment space 20a and facilitating the improvement of the service life of the battery device 100.

[0381] Referring to Figure 20, according to some embodiments of this application, the airtight component 41 is a sealing membrane 411, which covers the air inlet 21a of the exhaust channel 21.

[0382] In some embodiments, the sealing film 411 covers the air inlet 21a of the exhaust channel 21 and is connected to the housing 20 to secure the sealing film 411. For example, the housing 20 includes a frame 22, the interior of which is hollow to form at least a portion of the exhaust channel 21. The air inlet 21a of the exhaust channel 21 is formed on the inner surface of the frame 22. The sealing film 411 is bonded to the inner surface of the frame 22 and covers the air inlet 21a of the exhaust channel 21. As another example, the housing 20 includes a housing body 23 and an exhaust pipe 24. The exhaust pipe 24 is connected to the housing body 23, and the interior of the exhaust pipe 24 forms the exhaust channel 21. The sealing film 411 covers the air inlet 21a of the exhaust pipe 24 and is bonded to the exhaust pipe 24.

[0383] In some embodiments, the sealing membrane 411 can be a waterproof and breathable membrane. The waterproof and breathable membrane has pores, and the gas molecules are spaced relatively far apart, allowing them to pass through the pores during diffusion. The liquid molecules are spaced relatively far apart, and under the action of surface tension, the liquid molecules cannot pass through the waterproof and breathable membrane, thus achieving a waterproof effect.

[0384] In some embodiments, the sealing membrane 411 is configured to be melted or ruptured by the emissions to open the air inlet 21a of the exhaust passage 21, allowing the emissions to enter the exhaust passage 21. For example, when the first pressure relief mechanism 11 is actuated, the emissions from the battery cell 10 enter the receiving space 20a via the actuation portion of the first pressure relief mechanism 11. Since the strength of the sealing membrane 411 is relatively small compared to the housing 20, the emissions melt or rupture the sealing membrane 411, allowing the emissions to enter the exhaust passage 21.

[0385] By covering the air inlet 21a of the exhaust channel 21 with the sealing film 411, external impurities can be blocked from entering the containment space 20a when the battery device 100 is working normally. Furthermore, when the first pressure relief mechanism 11 is actuated, the exhaust material can break through the sealing film 411 and enter the exhaust channel 21, facilitating the discharge of the exhaust material to the outside of the housing 20.

[0386] Please refer to Figure 21. According to some embodiments of this application, the airtight component 41 is a breathing valve 412, which is disposed at the exhaust port 21b of the exhaust channel 21.

[0387] Breathing valve 412, also known as a balancing valve, is a valve that isolates the containing space 20a from the outside air of the housing 20 within a certain pressure range, while allowing it to communicate (breathe) with the outside air of the housing 20 when the pressure exceeds or falls below this range. Breathing valve 412 is prior art, and its specific structure will not be described in detail in this application.

[0388] By setting the breather valve 412 at the exhaust port 21b of the exhaust channel 21, it is easy to block external impurities from entering the exhaust channel 21, and when the pressure in the containment space 20a is greater than the external pressure of the box 20, the pressure in the containment space 20a is released, which helps to improve the service life of the battery device 100.

[0389] According to some embodiments of this application, the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 is L1, which satisfies 0.1m≤L1≤0.5m.

[0390] The shortest distance between the first pressure relief mechanism 11 and the air inlet 21aa of the exhaust channel 21 refers to the minimum distance between the first pressure relief mechanism 11 of the battery cell 10 closest to the air inlet 21a of the exhaust channel 21 and the edge of the air inlet 21a. This distance can be the straight-line distance between the first pressure relief mechanism 11 and the air inlet 21a.

[0391] In some embodiments, the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 can be, but is not limited to, any one or any two of 0.1m, 0.12m, 0.14m, 0.16m, 0.18m, 0.2m, 0.22m, 0.24m, 0.26m, 0.28m, 0.3m, 0.32m, 0.34m, 0.36m, 0.38m, 0.4m, 0.42m, 0.44m, 0.46m, 0.48m, or 0.5m.

[0392] If the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 is too small, the emissions from the battery cell 10 discharged when the first pressure relief mechanism 11 is activated can easily enter the exhaust channel 21 directly, resulting in insufficient cooling of the emissions within the containment space 20a and a low cooling effect. If the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 is too large, the emissions will remain in the containment space 20a for too long, preventing the emissions from being quickly discharged to the outside of the housing 20, resulting in excessive internal pressure within the housing 20 and failure of the housing 20's seal.

[0393] By setting the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 to be greater than or equal to 0.1m and less than or equal to 0.5m, the exhaust can be quickly discharged to the outside of the box 20 while ensuring that the exhaust stays in the containment space 20a for a longer time and the cooling effect is good. This reduces the risk of the box 20 failing to seal due to internal pressure buildup.

[0394] According to some embodiments of this application, 0.2m≤L1≤0.4m.

[0395] In some embodiments, the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 can be, but is not limited to, any one or any two of 0.2m, 0.25m, 0.3m, 0.35m or 0.4m.

[0396] When L1≥0.2m, the discharge from the first pressure relief mechanism 11 stays in the containment space 20a for a longer time, and there is a longer heat exchange time between the discharge and the air in the containment space 20a, resulting in a better cooling effect of the discharge in the containment space 20a; when L1≤0.4m, the risk of pressure buildup inside the box 20 caused by the discharge staying in the containment space 20a is further reduced, thereby reducing the risk of sealing failure of the box 20.

[0397] Optionally, 0.24m≤L1≤0.36m.

[0398] According to some embodiments of this application, the first pressure relief mechanism 11 is offset from the air inlet 21a of the exhaust channel 21.

[0399] The first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 are staggered, meaning that the first pressure relief mechanism 11 and the air inlet 21a do not overlap in the direction perpendicular to the plane where the air inlet 21a is located. That is, when the first pressure relief mechanism 11 is actuated, the exhaust material discharged will not be sprayed directly toward the air inlet 21a, so that the flow path between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 is longer.

[0400] By staggering the first pressure relief mechanism 11 with the air inlet 21a of the exhaust channel 21, the emissions stay in the containment space 20a for a longer time, which is conducive to the cooling of the emissions. This reduces the risk that the emissions will directly enter the exhaust channel 21 after being discharged from the battery cell 10, resulting in poor cooling effect of the emissions.

[0401] Referring to Figure 2, according to some embodiments of this application, the accommodating space 20a has a collection chamber 20d, which is used to collect the emissions from the battery cell 10 when the first pressure relief mechanism 11 is actuated. The exhaust channel 21 is connected to the collection chamber 20d. The volume of the collection chamber 20d is V, and the length of the exhaust channel 21 is L2, satisfying 15L≤V≤270L and 0.2m≤L2≤20m.

[0402] The collection chamber 20d is a chamber for collecting emissions from the battery cell 10. The collection chamber 20d can be part of the housing space 20a, and the exhaust passage 21 communicates with the collection chamber 20d. The battery cell 10 is housed in the housing space 20a. When the first pressure relief mechanism 11 is actuated, the emissions discharged enter the collection chamber 20d and then enter the exhaust passage 21 through the collection chamber 20d.

[0403] The method for measuring the volume of the collection chamber 20d is as follows: Place the battery device 100 horizontally, and drill two holes at the upper part of the housing 20 corresponding to the position of the collection chamber 20d. The two holes are designated as hole number 1 and hole number 2. Connect pipes to the two holes, and seal the contact points between the pipes and the housing 20. Pour insulating liquid (such as silicone oil) into the housing 20 through hole number 1 until the air inside the housing 20 is completely expelled through hole number 2 (until insulating liquid begins to emerge from hole number 2). Count the volume of the injected insulating liquid at this point; this volume is the volume V of the collection chamber 20d.

[0404] The length of the exhaust passage 21 refers to the total length of the pipe from the air inlet 21a to the exhaust outlet 21b of the exhaust passage 21. If the exhaust passage 21 has multiple sections, the length of each section should be measured separately and then added together to obtain the total length. The method for measuring the length of the exhaust passage 21 is as follows: using the wire threading method, a measuring wire is inserted into the air inlet 21a of the exhaust passage 21, runs along the exhaust passage 21, and exits at the exhaust outlet 21b. The length of the wire from the air inlet 21a to the exhaust outlet 21b is measured, and this length is the length of the exhaust passage 21.

[0405] If the volume of the collection chamber 20d is too small, the exhaust will quickly fill it, causing a rapid increase in air pressure and potentially leading to pressure buildup and seal failure in the housing 20. Simultaneously, the exhaust will remain in the collection chamber 20d for a short time, resulting in poor cooling. Conversely, if the volume of the collection chamber 20d is too large, it will hold too much air, making it prone to mixing with the exhaust and potentially causing an explosion, also leading to seal failure in the housing 20.

[0406] By setting the volume of the collection chamber 20d to be greater than or equal to 15L and less than or equal to 270L, while ensuring that the emissions remain in the collection chamber 20d for a longer period of time and that the temperature can be reduced, there is less air in the collection chamber 20d, which reduces the risk of emissions mixing with air and causing an explosion, and also reduces the risk of the housing 20 failing to seal.

[0407] In some embodiments, the volume of the collection chamber 20d can be, but is not limited to, any one or any two of 15L, 30L, 60L, 90L, 120L, 150L, ​​180L, 210L, 240L or 270L.

[0408] If the length of the exhaust channel 21 is too short, the exhaust material will remain in the exhaust channel 21 for a short time, resulting in poor cooling effect and less deposition of solid particles in the exhaust material within the exhaust channel 21. If the length of the exhaust channel 21 is too long, the exhaust material will remain in the exhaust channel 21 for too long, preventing it from being quickly discharged to the outside of the housing 20, causing pressure buildup inside the housing 20 and failure of the housing 20's seal.

[0409] By setting the length of the exhaust channel 21 to be greater than or equal to 0.2m and less than or equal to 20m, the exhaust can be quickly discharged to the outside of the housing 20 while ensuring that the exhaust has a longer residence time in the exhaust channel 21 and is easy to cool down. This reduces the risk of the housing 20 failing to seal due to internal pressure buildup.

[0410] In some embodiments, the length of the exhaust channel 21 can be, but is not limited to, any one or any two of 0.2m, 0.5m, 1m, 1.5m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, 12m, 15m, 18m or 20m.

[0411] If the volume of the collection chamber 20d is too large and the length of the exhaust channel 21 is too long, the emissions from the thermal runaway of the battery cell 10 cannot be effectively and timely discharged outside the housing 20, which can easily cause excessive internal pressure in the housing 20 and lead to sealing failure. If the volume of the collection chamber 20d is too small and the length of the exhaust channel 21 is too short, the emissions from the thermal runaway of the battery cell 10 cannot be effectively cooled before being discharged outside the housing, resulting in significant environmental pollution. By setting the volume of the collection chamber 20d to be greater than or equal to 15L and less than or equal to 270L, and setting the length of the exhaust channel 21 to be greater than or equal to 0.2m and less than or equal to 20m, the temperature of the emissions when discharged outside the housing 20 can be reduced, the solid particle content in the emissions can be reduced, and the pollution of the external environment can be reduced. At the same time, it is beneficial to depressurize the housing 20, avoid airtightness failure caused by excessive pressure, and improve the reliability of the battery device 100.

[0412] According to some embodiments of this application, 30L≤V≤210L.

[0413] In some embodiments, the volume of the collection chamber 20d can be, but is not limited to, any one or a range between any two of 30L, 40L, 50L, 60L, 70L, 80L, 90L, 100L, 110L, 120L, 130L, 140L, 150L, ​​160L, 170L, 180L, 190L, 200L, or 210L.

[0414] When V≥30L, the emissions from the battery cell 10 can remain in the collection chamber 20d for a longer time, resulting in better cooling of the emissions; when V≤210L, the risk of explosion caused by the mixing of high-temperature flue gas and air in the emissions is further reduced, as is the risk of sealing failure of the housing 20.

[0415] Optionally, 60L≤V≤120L.

[0416] According to some embodiments of this application, 2m≤L2≤15m.

[0417] In some embodiments, the length of the exhaust channel 21 can be, but is not limited to, any one or any two of 2m, 2.5m, 3.5m, 4.5m, 5.5m, 6.5m, 7.5m, 8.5m, 9.5m, 10.5m, 11.5m, 12.5m, 13.5m, 14.5m or 15m.

[0418] When L2≥2m, the emissions from the battery cell 10 remain in the exhaust channel 21 for a longer time, which helps to improve the cooling effect of the emissions. When L2≤15m, the emissions can be quickly discharged to the outside of the box 20, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0419] Optionally, 5m≤L2≤10m.

[0420] Please refer to Figure 8. According to some embodiments of this application, the exhaust passage 21 has multiple air inlets 21a.

[0421] Multiple air inlets 21a of the exhaust passage 21 can be set on different walls of the housing 20 to collect emissions at different locations, reducing the risk of emissions accumulating in the containment space 20a and causing pressure buildup inside the housing 20, which could lead to sealing failure of the housing 20.

[0422] In some embodiments, the air inlets 21a of the plurality of exhaust channels 21 may be spaced apart along the extension direction of the exhaust channels 21.

[0423] In some embodiments, the shape and size of each air inlet 21a of the exhaust channel 21 may be the same to facilitate manufacturing.

[0424] When there are multiple air inlets 21a in the exhaust passage 21, even if one air inlet 21a is blocked, the exhaust can still enter other air inlets 21a, which facilitates the exhaust to enter the exhaust passage 21, reduces the risk of pressure buildup inside the housing 20, and prevents the housing 20 from failing to seal.

[0425] By setting multiple air inlets 21a in the exhaust channel 21, it is possible for emissions to enter the exhaust channel 21 from different positions, which is conducive to the rapid discharge of emissions.

[0426] According to some embodiments of this application, the total area of ​​the plurality of air inlets 21a of the exhaust channel 21 is S3, and the area of ​​the first pressure relief mechanism 11 is S4, satisfying that 0.1≤S3 / S4≤10.

[0427] The total area of ​​the multiple air inlets 21a of the exhaust passage 21 refers to the sum of the areas of all the air inlets 21a of the exhaust passage 21.

[0428] In some embodiments, S3 / S4 can be, but is not limited to, any one or any two of 0.1, 0.2, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

[0429] If the total area of ​​the multiple air inlets 21a of the exhaust passage 21 is too small compared to the area of ​​the first pressure relief mechanism 11, the exhaust material is prone to blockage at the air inlets 21a, resulting in poor exhaust flow, pressure buildup inside the housing 20, and failure of the housing 20's seal. If the total area of ​​the multiple air inlets 21a of the exhaust passage 21 is too large compared to the area of ​​the first pressure relief mechanism 11, the exhaust material cannot be sufficiently cooled within the containment space 20a and will quickly enter the exhaust passage 21, resulting in a higher temperature of the exhaust material discharged outside the housing 20.

[0430] By setting the ratio of the total area of ​​the multiple air inlets 21a of the exhaust channel 21 to the area of ​​the first pressure relief mechanism 11 to be greater than or equal to 0.1 and less than or equal to 10, it is convenient for the exhaust material to cool down in the containment space 20a, and also convenient for the exhaust material to enter the exhaust channel 21 in time and be discharged to the outside of the box 20, thereby reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0431] According to some embodiments of this application, 0.5 ≤ S3 / S4 ≤ 5.

[0432] When 0.5≤S2 / S3≤5, it further facilitates the cooling of the emissions within the containment space 20a, and further facilitates the timely entry of the emissions into the exhaust channel 21 and discharge to the outside of the housing 20, reducing the risk of the housing 20 failing to seal due to internal pressure buildup.

[0433] Optionally, 0.8 ≤ S3 / S4 ≤ 3.

[0434] According to some embodiments of this application, 150mm 2 ≤S3≤3200mm 2 .

[0435] In some embodiments, S3 can be, but is not limited to, 150 mm. 2 200mm 2 300mm 2 400mm 2 500mm 2 800mm 2 1200mm 2 1600mm 2 2000mm 2 2400mm 2 2800mm 2 Or 3200mm 2 The range between any one of them or any two of them.

[0436] If the total area of ​​the multiple air inlets 21a in the exhaust passage 21 is too small, the exhaust material is prone to blockage at the air inlets 21a, resulting in poor exhaust flow, excessive internal pressure in the housing 20, and failure of the housing 20's seal. If the total area of ​​the multiple air inlets 21a in the exhaust passage 21 is too large, the exhaust material cannot be sufficiently cooled within the containment space 20a and will quickly enter the exhaust passage 21, resulting in a higher temperature of the exhaust material discharged to the outside of the housing 20.

[0437] By setting the total area of ​​the multiple air inlets 21a of the exhaust passage 21 to be greater than or equal to 150 mm. 2 and less than or equal to 3200mm 2 This design facilitates a longer residence time of the emissions within the containment space 20a, allows the emissions to cool down within the collection chamber 20d, and enables the emissions to enter the exhaust channel 21 in a timely manner and be discharged to the outside of the housing 20, thereby reducing the risk of the housing 20 failing to seal due to internal pressure buildup.

[0438] According to some embodiments of this application, 200mm 2 ≤S3≤2200mm 2 .

[0439] When S3≥200mm 2This further facilitates the timely entry of emissions into the exhaust channel 21 and their discharge to the outside of the housing 20, reducing the risk of internal pressure buildup in the housing 20 leading to sealing failure; when S3≤2200mm 2 This further facilitates the longer residence time of emissions within the containment space 20a, and facilitates the cooling of emissions within the containment space 20a.

[0440] Optional, 650mm 2 ≤S3≤1200mm 2 .

[0441] According to some embodiments of this application, 100mm 2 ≤S4≤1500mm 2 .

[0442] In some embodiments, S4 can be, but is not limited to, 100 mm. 2 150mm 2 200mm 2 300mm 2 500mm 2 800mm 2 1000mm 2 1300mm 2 Or 1500mm 2 The range between any one of them or any two of them.

[0443] If the area of ​​the first pressure relief mechanism 11 is too small, the corresponding total area of ​​the multiple air inlets 21a of the exhaust channel 21 will be too large. In this case, the exhaust material cannot be sufficiently cooled within the containment space 20a and will quickly enter the exhaust channel 21, resulting in a high temperature of the exhaust material discharged to the outside of the housing 20. Conversely, if the area of ​​the first pressure relief mechanism 11 is too large, the corresponding total area of ​​the multiple air inlets 21a of the exhaust channel 21 will be too small. This will easily cause blockage at the air inlets 21a, hindering exhaust flow and leading to pressure buildup inside the housing 20, ultimately causing the housing 20 to fail to seal.

[0444] By setting the area of ​​the first pressure relief mechanism 11 to be greater than or equal to 100 mm² 2 and less than or equal to 1500mm 2 This design facilitates a longer residence time of the emissions within the containment space 20a, allowing for cooling of the emissions within the containment space 20a. It also facilitates the timely entry of the emissions into the exhaust channel 21 and their discharge to the outside of the housing 20, reducing the risk of pressure buildup inside the housing 20 leading to sealing failure of the housing 20.

[0445] According to some embodiments of this application, 300mm 2 ≤S4≤1200mm 2 .

[0446] When S4≥300mm 2 This further facilitates a longer residence time of the emissions in the collection chamber within 20 days, allowing the emissions to cool down within the collection chamber during this period; when S4 ≤ 1200 mm 2 This further facilitates the timely entry of emissions into the exhaust channel 21 and their discharge to the outside of the housing 20, reducing the risk of internal pressure buildup in the housing 20 leading to sealing failure of the housing 20.

[0447] Optional, 450mm 2 ≤S4≤800mm 2 .

[0448] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to provide electrical energy to the electrical device.

[0449] The power supply device can be any of the above-mentioned devices or systems that use battery device 100.

[0450] By adopting the battery device 100 described above, it is possible to reduce emissions that pollute the environment and reduce the impact on electrical appliances and users.

[0451] According to some embodiments of this application, please refer to Figures 2 to 21. This application provides a battery device 100, which includes a battery cell 10, a housing 20, and a throttling element 31.

[0452] The battery cell 10 has a first pressure relief mechanism 11, and the housing 20 has a receiving space 20a for accommodating the battery cell 10. The housing 20 includes a frame 22, the interior of which is hollow to form at least a portion of an exhaust channel 21, which communicates with the receiving space 20a. The exhaust channel 21 is used to guide the emissions from the battery cell 10 to be discharged outside the housing 20 when the first pressure relief mechanism 11 is actuated.

[0453] Throttling element 31 is installed in exhaust passage 21, and throttling element 31 blocks exhaust passage 21. Throttling element 31 is provided with gap 311, and the flow area of ​​gap 311 is the minimum flow area of ​​exhaust passage 21.

[0454] By setting the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 to be greater than or equal to 1.66 and less than or equal to 160, the area of ​​the air inlet 21a of the exhaust channel 21 is set to be greater than or equal to 150 mm². 2 and less than or equal to 3200mm 2 The minimum flow area of ​​the exhaust channel 21 is set to be greater than or equal to 10 mm. 2 and less than or equal to 90mm 2Under the condition that the emissions have a long residence time in the exhaust channel 21 and are easy to cool down, the emissions can be quickly discharged to the outside of the exhaust channel 21, reducing the risk of the box 20 failing to seal due to internal pressure buildup.

[0455] The features and performance of this application will be further described in detail below with reference to embodiments.

[0456] I. Structure of Battery Device 100

[0457] In various embodiments and comparative examples, the housing 20 of the battery device 100 includes a first sub-housing 20b and a second sub-housing 20c. The first sub-housing 20b is a plate-like structure, and the second sub-housing 20c is a hollow structure with one end open. The first sub-housing 20b covers the open side of the second sub-housing 20c, so that the first sub-housing 20b and the second sub-housing 20c together define a receiving space 20a. The battery cell 10 is disposed in the receiving space 20a, and the collection cavity 20d is a part of the receiving space 20a. The second sub-housing 20c includes a frame 22, and the interior of the frame 22 is hollow to form at least a partial exhaust channel 21. The air inlet 21a of the exhaust channel 21 communicates with the collection cavity 20d, and the exhaust outlet 21b of the exhaust channel 21 communicates with the outside of the housing 20.

[0458] II. Testing Methods

[0459] (1) Minimum flow area test of exhaust channel 21

[0460] The exhaust channel 21 is scanned by a CT scanner to obtain the minimum flow area of ​​the exhaust channel 21. The minimum flow area of ​​the exhaust channel 21 is scanned again, and the flow area of ​​the exhaust channel 21 is measured on the cross-sectional image obtained by the scan to obtain the minimum flow area of ​​the exhaust channel 21.

[0461] (2) Area test of air inlet 21a of exhaust channel 21

[0462] The area of ​​the air inlet 21a can be measured by a CCD camera. When there are multiple air inlets 21a in the exhaust channel 21, the area of ​​the air inlets 21a in the exhaust channel 21 is the total area of ​​the multiple air inlets 21a.

[0463] (3) Temperature test when emissions are discharged to the outside of the housing 20

[0464] A temperature sensor is installed at the exhaust port 21b of the exhaust passage 21 to detect the temperature at the exhaust port 21b of the exhaust passage 21 in real time. Specifically, the temperature sensor is installed at the exhaust port 21b of the exhaust passage 21 so that the temperature sensor can detect the temperature of the emissions discharged through the exhaust port 21b.

[0465] (4) Enclosure sealing test

[0466] The exhaust channel 21 is sealed, and the sealing performance of the housing 20 is tested using a sealing tester. Specifically, the sealing tester fills the housing 20 with gas and maintains a certain pressure, then observes the pressure change to determine if there is a leak. If the pressure drop is less than 40 Pa within 1 minute, it indicates no leak and the housing 20 is well sealed; if the pressure drop is greater than or equal to 40 Pa within 1 minute, it indicates a leak and the housing 20 is not sealed.

[0467] (5) Minimum width test of gap 311

[0468] The throttling device 31 is scanned using a CT scanning device, and the minimum width of the gap 311 is measured on the obtained cross-sectional image.

[0469] (6) Thermal conductivity test

[0470] The test was conducted using the protective hot plate method, and the test was performed using a protective hot plate thermal conductivity meter in accordance with the GB / T10294-2008 standard.

[0471] (7) Minimum thickness test of the wall of exhaust channel 21

[0472] The wall surrounding the exhaust channel 21 is scanned using a CT scanner, and the minimum thickness of the wall of the exhaust channel 21 is measured on the scanned image.

[0473] (8) Shortest distance test between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21

[0474] Select the battery cell 10 closest to the air inlet 21a of the exhaust channel 21, and measure the straight-line distance between the first pressure relief mechanism 11 of the battery cell 10 and the air inlet 21a. The measurement can be done with the help of a string. For example, fix one end of the inelastic string (defined as the starting point) to the first pressure relief mechanism 11 of the battery cell 10, make the string taut and extend it to the air inlet 21a, and mark the end point on the string. Measure the distance between the starting point and the end point of the string. This distance is the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21.

[0475] (9) Volume test of the collection chamber 20d

[0476] Place the battery device 100 horizontally. Drill two holes at the upper part of the corresponding positions of the housing 20 and the collection chamber 20d, designated as hole number 1 and hole number 2. Connect pipes to these two holes, sealing the contact points between the pipes and the housing 20. Pour insulating liquid (such as silicone oil) into the housing 20 through hole number 1 until all air inside the housing 20 is completely expelled through hole number 2 (until insulating liquid begins to emerge from hole number 2). Count the volume of the injected insulating liquid; this volume is the volume of the collection chamber 20d.

[0477] (10) Length test of exhaust channel 21

[0478] Using the wire threading method, a measuring steel wire is inserted into the exhaust channel 21 through the air inlet 21a, along the exhaust channel 21, and out through the exhaust outlet 21b. The length of the steel wire from the air inlet 21a to the exhaust outlet 21b is measured, and this length is the length of the exhaust channel 21. If the exhaust channel 21 has multiple segments, the length of each segment should be measured separately, and then the lengths should be added together to obtain the total length, which is the length of the exhaust channel 21.

[0479] (11) Test of the total area of ​​multiple air inlets 21a in the exhaust channel 21

[0480] The area of ​​the air inlet 21a can be measured by a CCD camera, and the sum of the areas of all the air inlets 21a is the total area of ​​the multiple air inlets 21a.

[0481] III. Measurement Results

[0482] In various embodiments and comparative examples, the test results of the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 are shown in Table 1; the test results of the minimum flow area of ​​the exhaust channel 21 are shown in Table 2; the test results of the area of ​​the air inlet 21a of the exhaust channel 21 are shown in Table 3; the test results of the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, and the minimum width of the gap 311 are shown in Table 4; the test results of the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, and the thermal conductivity of the wall of the exhaust channel 21 are shown in Table 5; the test results of the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, and the minimum thickness of the wall of the exhaust channel 21 are shown in Table 6; and the test results of the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, and the minimum flow area of ​​the exhaust channel 21 are shown in Table 6. The test results for the area of ​​the exhaust channel 21, the shortest distance between the first pressure relief mechanism 11 and the air inlet 21a of the exhaust channel 21 are shown in Table 7. The test results for the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, the volume of different collection chambers 20d, and the length of the same exhaust channel 21 are shown in Table 8. The test results for the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, the volume of the same collection chamber 20d, and the length of different exhaust channels 21 are shown in Table 9. The test results for the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, the total area of ​​multiple air inlets 21a of the exhaust channel 21, and the area of ​​the first pressure relief mechanism 11 are shown in Table 10. The test results for the area of ​​the air inlet 21a of the exhaust channel 21, the minimum flow area of ​​the exhaust channel 21, and the area of ​​the first pressure relief mechanism 11 are shown in Table 11.

[0483] Table 1

[0484] As shown in Table 1, in Examples 1-7, the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 is greater than or equal to 1.66 and less than or equal to 160. The exhaust temperature is ≤100℃, the internal pressure of the housing 20 is low, and the housing 20 is well sealed. In Comparative Example 1, the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 is less than 1.66. The exhaust flows too fast within the exhaust channel 21, and the exhaust temperature is >100℃. In Comparative Example 2, the ratio of the area of ​​the air inlet 21a of the exhaust channel 21 to the minimum flow area of ​​the exhaust channel 21 is greater than 160. The exhaust cannot be quickly discharged from the exhaust channel 21, resulting in excessive internal pressure of the housing 20 and failure of the housing 20's seal.

[0485] Table 2

[0486] As shown in Table 2, in Examples 1-5, 10mm 2 ≤S1≤90mm 2 The emission temperature is ≤100℃, and the enclosure is well-sealed. In Comparative Example 1, S1 < 10mm. 2 The exhaust passage 21 was blocked, causing excessive internal pressure in the housing 20, which led to the failure of the housing 20's seal. In Comparative Example 2, S1 > 90mm 2 The emission temperature is >100℃.

[0487] Table 3

[0488] As shown in Table 3, in Examples 1-5, 150mm 2 ≤S2≤3200mm 2 The emission temperature is ≤100℃, and the enclosure is well-sealed. In Comparative Example 1, S2 < 150mm. 2 The emission temperature is >100℃. In Comparative Example 2, S2 > 3200 mm. 2 Excessive internal pressure caused the seal of box 20 to fail.

[0489] Table 4

[0490] As shown in Table 4, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 In Comparative Example 1, H < 0.1 mm, the internal pressure of the chamber 20 is too high, and the seal of the chamber 20 fails. In Comparative Example 2, H > 1 mm, and the discharge temperature of the exhaust material is > 100℃.

[0491] Table 5

[0492] As shown in Table 5, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 The thermal conductivity of exhaust channel 21 is ≥30W / (m·K), indicating good thermal conductivity of the wall and good cooling effect of the exhaust, with an exhaust temperature ≤100℃. In comparative examples 1 and 2, the thermal conductivity is <30W / (m·K), indicating poor thermal conductivity of the wall of exhaust channel 21 and an exhaust temperature >100℃.

[0493] Table 6

[0494] As shown in Table 6, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 In Comparative Example 1, with a thickness of 0.2mm ≤ D ≤ 4mm, the wall of exhaust channel 21 has high strength, resulting in good heat transfer between the exhaust material and the wall of exhaust channel 21. The exhaust temperature is ≤100℃, and the housing 20 is well sealed. In Comparative Example 2, with a thickness of D < 0.2mm, the wall of exhaust channel 21 is thinner, and the wall is breached by the high-temperature exhaust material, causing the housing 20 to fail to seal. In Comparative Example 3, with a thickness of D > 4mm, the wall of exhaust channel 21 is thicker, resulting in poor heat transfer between the exhaust material and the wall of exhaust channel 21. The exhaust temperature is >100℃.

[0495] Table 7

[0496] As shown in Table 7, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 In Comparative Example 1, with L1 < 0.5m, the emissions remain in the containment space 20a for a relatively long time and the cooling effect is good, resulting in low-temperature emissions (less than or equal to 80℃) discharged to the outside of the housing 20. Simultaneously, the emissions can quickly enter the exhaust channel 21, and the housing 20 remains well-sealed. In Comparative Example 2, with L1 > 5m, the emissions remain in the containment space 20a for a longer time, resulting in poor cooling and an exhaust temperature > 100℃, polluting the environment, but the housing 20 remains well-sealed. In Comparative Example 2, with L1 > 5m, the emissions remain in the containment space 20a for a longer time, preventing rapid discharge to the outside of the housing 20, leading to excessive internal pressure and ultimately causing the housing 20's seal to fail.

[0497] Table 8

[0498] As shown in Table 8, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2In Comparative Example 1, with V < 15L, the emissions from battery cell 10 reside in the collection chamber 20d for a relatively long time and experience good cooling. The temperature of the emissions discharged to the outside of the housing 20 is low (less than or equal to 80℃). Simultaneously, the limited air in the collection chamber 20d reduces the risk of explosion due to the mixing of high-temperature flue gas and air in the emissions, and the housing 20 remains well-sealed. In Comparative Example 2, with V > 270L, there is too much air in the collection chamber 20d. The mixing of high-temperature flue gas and air could lead to an explosion, causing the housing 20 to fail to seal.

[0499] Table 9

[0500] As shown in Table 9, in Examples 1-5, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 In Comparative Example 1, with L2 < 0.2m, the emissions from battery cell 10 remain in the exhaust channel 21 for a longer time and experience better cooling. The temperature of the emissions discharged to the outside of the casing 20 is relatively low (less than or equal to 80℃). Simultaneously, the emissions can be quickly discharged to the outside of the casing 20, and the casing 20 remains sealed. In Comparative Example 2, with L2 > 20m, the emissions remain in the exhaust channel 21 for a longer time, resulting in poorer cooling. The temperature of the emissions discharged to the outside of the casing 20 is > 100℃, polluting the environment, but the casing 20 remains sealed. In Comparative Example 2, with L2 > 20m, the emissions remain in the exhaust channel 21 for a longer time, preventing rapid discharge to the outside of the casing 20. This leads to excessive internal pressure within the casing 20, causing the casing 20 to fail to seal.

[0501] Table 10

[0502] As shown in Table 10, in Examples 1-7, S2 / S1 = 15, S2 = 1200 mm 2 S1 = 80mm 2 In Comparative Example 1, S3 / S4 < 0.1, the exhaust port 21a of the exhaust channel 21 is too small, the internal pressure of the box 20 is too large, and the seal of the box 20 fails. In Comparative Example 2, S3 / S4 > 10, the exhaust port 21a of the exhaust channel 21 is too large, the residence time of the exhaust in the containing space 20a is short, the cooling effect of the exhaust is poor, and the exhaust temperature is > 100℃.

[0503] Table 11

[0504] During the test shown in Table 11, the total area S3 of the multiple air inlets 21a of the exhaust channel 21 was 1000 mm². 2 As shown in Table 11, in Examples 1-5, S2 / S1 = 20, S2 = 1000 mm 2 S1 = 50mm 2 100mm 2 ≤S4≤1500mm 2 This design facilitates both cooling of the emissions within the containment space 20a and rapid discharge of the emissions to the outside of the housing 20, ensuring that the discharge temperature is ≤100℃ and that the housing 20 remains well-sealed. In Comparative Example 1, S4 < 100mm 2 When high-temperature flue gas mixes with air, combustion occurs, causing the seal of chamber 20 to fail. In Comparative Example 2, S4 > 1500 mm. 2 The cooling effect of the emissions within the containment space is poor within 20 years, and the emission temperature is >100℃.

[0505] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Each battery cell has a first pressure relief mechanism; The housing has a receiving space for accommodating the individual battery cells; The enclosure also includes an exhaust channel connected to the accommodating space. The exhaust channel guides the emissions from the battery cells to the outside of the enclosure when the first pressure relief mechanism is actuated. The minimum flow area of ​​the exhaust channel is S1, and the area of ​​the air inlet is S2, satisfying 1.66 ≤ S2 / S1 ≤ 160 mm. 2 ≤S1≤90mm 2 150mm 2 ≤S2≤3200mm 2 .

2. The battery device according to claim 1, characterized in that, 6≤S2 / S1≤43.

3. The battery device according to claim 1 or 2, characterized in that, 20mm 2 ≤S1≤60mm 2 。 4. The battery device according to any one of claims 1-3, characterized in that, 200mm 2 ≤S2≤2200mm 2 。 5. The battery device according to any one of claims 1-4, characterized in that, The battery device further includes a throttling element disposed within the exhaust channel, which blocks the exhaust channel. The throttling element has a gap, the flow area of ​​which is the minimum flow area of ​​the exhaust channel.

6. The battery device according to claim 5, characterized in that, The minimum width of the gap is H, which satisfies 0.1mm≤H≤1mm.

7. The battery device according to claim 6, characterized in that, 0.3mm≤H≤0.7mm.

8. The battery device according to any one of claims 5-7, characterized in that, The throttling element is sealed to the wall of the exhaust passage.

9. The battery device according to any one of claims 5-8, characterized in that, The number of throttling elements is multiple, and the multiple throttling elements are spaced apart along the extension direction of the exhaust passage.

10. The battery device according to any one of claims 1-9, characterized in that, The exhaust channel includes a first channel section and a second channel section, which are connected by a pipe joint. The flow area of ​​the second channel section is smaller than that of the first channel section.

11. The battery device according to any one of claims 1-10, characterized in that, The thermal conductivity of the wall of the exhaust channel is greater than or equal to 30 W / (m·K).

12. The battery device according to claim 11, characterized in that, The thermal conductivity of the wall of the exhaust channel is greater than or equal to 80 W / (m·K).

13. The battery device according to any one of claims 1-12, characterized in that, The melting point of the wall of the exhaust channel is greater than or equal to 80°C.

14. The battery device according to claim 13, characterized in that, The melting point of the wall of the exhaust channel is greater than or equal to 120°C.

15. The battery device according to any one of claims 1-14, characterized in that, The minimum thickness of the wall of the exhaust channel is D, which satisfies 0.2mm≤D≤4mm.

16. The battery device according to claim 15, characterized in that, 0.8mm≤D≤3mm.

17. The battery device according to any one of claims 1-16, characterized in that, The housing includes a frame, the interior of which is hollow to form at least a portion of the exhaust passage.

18. The battery device according to claim 17, characterized in that, The exhaust passage extends circumferentially along the frame.

19. The battery device according to any one of claims 1-16, characterized in that, The enclosure includes a main body and an exhaust pipe. The accommodating space is located within the main body, and the exhaust pipe is connected to the main body, with the exhaust channel formed inside the exhaust pipe.

20. The battery device according to claim 19, characterized in that, The exhaust pipe is located outside the housing body, and one end of the exhaust pipe is connected to the housing body.

21. The battery device according to any one of claims 1-20, characterized in that, The exhaust passage is equipped with a flow-disrupting component, which is used to change the flow path of the emissions within the exhaust passage.

22. The battery device according to any one of claims 1-21, characterized in that, The exhaust channel is equipped with a filter element, which is used to filter solid particles in the emissions within the exhaust channel.

23. The battery device according to any one of claims 1-22, characterized in that, An adsorption component is provided inside the exhaust channel, which is used to adsorb solid particles and / or liquids of the emissions inside the exhaust channel.

24. The battery device according to any one of claims 1-23, characterized in that, The battery device also includes an airtight component disposed in the exhaust channel, which is used to seal the containment space.

25. The battery device according to claim 24, characterized in that, The airtight component is a sealing membrane that covers the air inlet of the exhaust channel.

26. The battery device according to claim 24, characterized in that, The airtight component is a breather valve, which is located at the exhaust port of the exhaust channel.

27. The battery device according to any one of claims 1-26, characterized in that, The shortest distance between the first pressure relief mechanism and the air inlet of the exhaust channel is L1, which satisfies 0.1m≤L1≤0.5m.

28. The battery device according to claim 27, characterized in that, 0.2m≤L1≤0.4m.

29. The battery device according to any one of claims 1-28, characterized in that, The first pressure relief mechanism is offset from the air inlet of the exhaust channel.

30. The battery device according to any one of claims 1-29, characterized in that, The accommodating space has a collection chamber for collecting the emissions from the battery cell when the first pressure relief mechanism is actuated. The exhaust channel is connected to the collection chamber. The volume of the collection chamber is V, and the length of the exhaust channel is L2, satisfying 15L≤V≤270L and 0.2m≤L2≤20m.

31. The battery device according to claim 30, characterized in that, 30L≤V≤210L.

32. The battery device according to claim 30 or 31, characterized in that, 2m≤L2≤15m.

33. The battery device according to any one of claims 1-32, characterized in that, The exhaust channel has multiple air inlets.

34. The battery device according to claim 33, characterized in that, The total area of ​​the plurality of air inlets in the exhaust channel is S3, and the area of ​​the first pressure relief mechanism is S4, satisfying that 0.1≤S3 / S4≤10.

35. The battery device according to claim 34, characterized in that, 0.5≤S3 / S4≤5.

36. The battery device according to claim 34 or 35, characterized in that, 150mm 2 ≤S3≤3200mm 2 。 37. The battery device according to claim 36, characterized in that, 200mm 2 ≤S3≤2200mm 2 。 38. The battery device according to any one of claims 34-37, characterized in that, 100mm 2 ≤S4≤1500mm 2 。 39. The battery device according to claim 38, characterized in that, 300mm 2 ≤S4≤1200mm 2 。 40. An electrical device, characterized in that, The battery device includes any one of claims 1-39, the battery device being used to provide electrical energy to the electrical device.

Images