Battery device and electric appliance

Abstract

The application discloses a battery device and an electric device. The battery device comprises a battery box, a battery cell, an explosion-proof valve and a gas treatment mechanism. The battery box is provided with a containing cavity. The battery cell is arranged in the containing cavity. The explosion-proof valve is arranged on the battery box and communicates with the containing cavity. The gas treatment mechanism is arranged outside the battery box. The gas treatment mechanism is provided with a gas passage. The gas passage communicates with the explosion-proof valve. The gas passage is provided with an exhaust port. The gas treatment mechanism comprises a carrier component and a cooling component. The carrier component is provided with an exhaust passage. The exhaust passage constitutes at least part of the gas passage. At least part of the cooling component is arranged in the exhaust passage. On the exhaust path of the gas passage, the cooling component is located upstream of the exhaust port. The technical scheme can improve the reliability of the battery device.

Description

Technical Field

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

[0002] When a battery device experiences thermal runaway, it will release a large amount of gas through the explosion-proof valve on the battery box. The gas temperature is extremely high, which can easily cause secondary fires or explosions in the surrounding environment, affecting the reliability of the battery device. Utility Model Content

[0003] The main objective of this application is to provide a battery device and an electrical appliance designed to improve the reliability of the battery device.

[0004] To achieve the above objectives, the battery device proposed in this application includes:

[0005] The battery box has a receiving cavity;

[0006] Battery cell, the battery cell is located inside the accommodating cavity;

[0007] Explosion-proof valve, the explosion-proof valve is located in the battery box and communicates with the receiving cavity; and

[0008] The gas handling mechanism is located on the outside of the battery box. The gas handling mechanism has a gas passage that is connected to the explosion-proof valve and has an exhaust port.

[0009] The gas handling mechanism includes a carrier component and a cooling component. The carrier component is provided with an exhaust channel, which constitutes at least part of the gas channel.

[0010] At least a portion of the cooling component is located within the exhaust passage, and the cooling component is positioned upstream of the exhaust port on the exhaust path of the gas passage.

[0011] In the technical solution of this application, a gas handling mechanism is provided on the outside of the battery box. This gas handling mechanism includes a carrier component and a cooling component. The exhaust channel of the carrier component can be connected to an explosion-proof valve, and the cooling component is at least partially disposed within the exhaust channel. Thus, during the thermal runaway of the battery device, when the explosion-proof valve is used to release pressure, the discharged gas can enter and flow through the exhaust channel. At this time, the cooling component can exchange heat with the gas flowing through the exhaust channel, lowering the gas temperature and reducing its volume. This allows the gas to be discharged from the exhaust port at a relatively low temperature with relatively low impact force, reducing the possibility of secondary fire or explosion caused by excessively high exhaust gas temperature, and also reducing the possibility of impact damage to surrounding structures caused by excessively large exhaust gas impact.

[0012] Furthermore, the gas handling mechanism is located on the outside of the battery box, which does not obstruct the discharge of gas inside the battery box. This allows the explosion-proof valve to quickly discharge and depressurize the gas inside the battery box, reducing the possibility of an explosion due to excessive gas pressure buildup inside the battery box.

[0013] Therefore, the optimized structure of the battery device in this solution can reduce the temperature and impact force of the discharged gas while ensuring the exhaust and pressure relief efficiency of the explosion-proof valve. This prevents an explosion due to excessive gas pressure inside the battery box and avoids secondary fires, explosions, or impact damage on the outside of the battery box due to excessive temperature and impact force of the discharged gas. This ensures reliable stability both inside and outside the battery box, thereby improving the reliability of the battery device.

[0014] In some embodiments, the cooling component has a medium space containing a working medium.

[0015] Therefore, after the working medium exchanges heat with the cooling component, it can absorb a large amount of heat from the gas through either latent heat or sensible heat of phase change, which is beneficial to improving the cooling effect on the gas.

[0016] In some embodiments, the gas processing mechanism further includes a circulation component that is in communication with the medium space to form a medium circulation loop;

[0017] The circulation assembly includes a heat exchanger located outside the exhaust passage;

[0018] The medium circulation loop has a driving structure configured to drive the working medium to flow in the medium circulation loop.

[0019] Thus, by circulating the working medium in the medium circulation loop, a cooling cycle is formed, enabling the gas handling mechanism to continuously cool and reduce the temperature of the gas in the exhaust channel, thereby further improving the cooling and temperature reduction effect of the gas.

[0020] In some embodiments, the heat exchanger is a condenser, and the circulation assembly further includes a connecting pipeline, a compressor, and a throttling element; the compressor, condenser, and throttling element are connected in series in the connecting pipeline, the connecting pipeline is connected to the medium space channel to form a closed loop, and the compressor is configured as a drive structure.

[0021] Therefore, since the low-temperature and low-pressure liquid working medium vaporizes at a constant temperature and pressure in the cooling components, it can absorb a large amount of heat by utilizing its huge latent heat of vaporization, which is conducive to producing an efficient and stable cooling effect.

[0022] In some embodiments, the heat exchanger is a radiator, and the circulation assembly further includes a connecting pipeline and a liquid pump; the liquid pump and the radiator are connected in series in the connecting pipeline, the connecting pipeline is connected to the medium space channel to form a closed loop, and the liquid pump is configured as a drive structure.

[0023] Therefore, by achieving cooling and circulation of gas in the exhaust channel, the number of components in the medium circulation loop can be reduced, which in turn improves the convenience of manufacturing and installing the gas handling mechanism.

[0024] In some embodiments, the number of cooling components is at least two, and the gas handling mechanism further includes two flow collection components;

[0025] At least two cooling components are connected in parallel between two collector components, and the circulation component is connected in series with the two collector components.

[0026] Therefore, setting the number of cooling components to at least two increases the heat exchange area with the gas in the exhaust channel, thereby further improving the cooling effect on the gas. Furthermore, the inclusion of two manifolds allows at least two cooling components to share a single circulation assembly, reducing the number of circulation assemblies required and improving the ease of manufacturing and installation of the gas handling mechanism.

[0027] In some embodiments, the battery device further includes a detection mechanism disposed within a receiving cavity or an exhaust channel;

[0028] The testing mechanism is configured to detect whether the battery device has experienced thermal runaway and is electrically connected to the drive structure.

[0029] Therefore, the medium circulation loop is activated after the detection mechanism detects thermal runaway of the battery device, which can reduce energy consumption costs.

[0030] In some embodiments, the battery device further includes a battery management system, wherein the battery cells, the drive structure, and the detection mechanism are electrically connected to the battery management system.

[0031] Therefore, the battery management system is directly used to control the drive structure, thus integrating the control of the drive structure into the battery management system to simplify the structure setup.

[0032] In some embodiments, the detection mechanism includes at least one of a pressure sensor and a temperature sensor.

[0033] Therefore, after thermal runaway occurs, the pressure and temperature of the battery device change significantly at various points in the exhaust channel and the accommodating cavity, which facilitates the testing by the testing agency and improves the accuracy of the detection of whether the battery device has experienced thermal runaway.

[0034] In some embodiments, the recirculation assembly is located outside the exhaust passage.

[0035] Therefore, on the one hand, the impact of the high-temperature gas discharged from the explosion-proof valve on the circulation components can be reduced. On the other hand, it can also reduce the space occupied in the exhaust channel, so as to arrange a sufficiently large cooling component to increase the heat exchange area with the gas, thereby improving the cooling effect of the gas; at the same time, the exhaust efficiency of the exhaust channel can also be taken into account.

[0036] In some embodiments, the gas handling mechanism further includes a nozzle and a first control valve, the nozzle being in communication with a medium space and an exhaust passage;

[0037] The first control valve is electrically connected to the nozzle and configured to control the opening and closing of the nozzle.

[0038] Therefore, the working medium located in the cooling component can indirectly exchange heat with the gas in the exhaust channel, while the working medium sprayed into the exhaust channel can directly exchange heat with the gas, which is conducive to further improving the cooling effect of the gas.

[0039] In some embodiments, the battery device further includes a detection mechanism and a battery management system. The detection mechanism is disposed in a receiving cavity or an exhaust channel and configured to detect whether thermal runaway has occurred in the battery device.

[0040] The battery cell, the detection mechanism, and the first control valve are electrically connected to the battery management system.

[0041] Therefore, the first control valve is electrically connected to the battery management system, so that the control of the first control valve can also be integrated into the battery management system, thereby simplifying the structural design.

[0042] In some embodiments, the exhaust passage extends along a first direction, and the cooling component extends along the first direction.

[0043] Therefore, by extending the cooling components along the extension direction of the exhaust channel, the space in the extension direction of the exhaust channel can be utilized to install the cooling components of the required size, thereby increasing the heat exchange area with the gas and improving the cooling effect on the gas.

[0044] In some embodiments, the cooling component includes an intermediate section and two end sections, the intermediate section extending along a first direction;

[0045] Two end segments are respectively located at both ends of the middle segment in the first direction and are bent and connected to the end segments.

[0046] Therefore, the two end sections can be easily connected to the recirculation assembly located outside the exhaust passage.

[0047] In some embodiments, at least a portion of the intermediate segment is bent.

[0048] This increases the heat exchange area with the gas, which in turn helps to improve the cooling effect on the gas.

[0049] In some embodiments, the intermediate section is arranged in a wavy or spiral shape.

[0050] Therefore, designing the middle section as wavy or spiral, with more bends, helps to increase the heat exchange area with the gas, thereby improving the cooling effect on the gas.

[0051] In some embodiments, the number of cooling components is at least two, and the at least two cooling components are arranged side by side at intervals in a direction intersecting the first direction.

[0052] Therefore, the number of cooling components is at least two, and they are arranged side by side at intervals in a direction intersecting the first direction, so that there is no obstruction between the at least two cooling components and both can come into contact with the flowing gas, thereby increasing the heat exchange area between the cooling components and the gas and improving the heat exchange and cooling effect on the gas.

[0053] In some embodiments, the gas processing apparatus further includes a filter element, at least a portion of which is disposed within the exhaust passage, and the filter element has a plurality of filter holes;

[0054] In the exhaust path of the gas channel, the filter element is located upstream of the exhaust port.

[0055] Therefore, the filter components can filter out particulate matter mixed in the gas, reducing the possibility of harmful substances being discharged from the exhaust port and causing pollution to the surrounding environment, and further improving the reliability of the battery device.

[0056] In some embodiments, the filter element is located downstream of the cooling element in the exhaust path of the gas passage.

[0057] This allows the high-temperature gas discharged from the explosion-proof valve to be cooled down by the cooling components before passing through the filter components, thereby reducing the possibility of the filter components being damaged by the high-temperature gas and improving the service life and reliability of the filter components.

[0058] In some embodiments, the filter element is a flexible filter membrane.

[0059] As a result, when the gas flows to the filter component, the filter component, due to its flexibility, can adaptively expand in response to the impact of the airflow, thereby buffering the impact of the airflow, reducing the possibility of damage to the filter component or connection failure due to airflow impact, and further improving the reliability of the filter component.

[0060] In some embodiments, the number of filter elements is at least two, and the at least two filter elements are arranged sequentially along the exhaust path of the exhaust channel;

[0061] There are at least two filter elements with different filter orifice sizes, and in any two filter elements with different filter orifice sizes, the filter element located upstream in the exhaust path of the exhaust channel has a larger filter orifice size than the filter element located downstream.

[0062] Therefore, at least two filter components can be formed into a stepped filter structure to filter particles of different sizes layer by layer, thereby improving filtration efficiency and filtration effect.

[0063] In some embodiments, the carrier component has a first opening communicating with the exhaust passage, and the gas handling mechanism further includes a buffer component;

[0064] A buffer component is provided over the first opening. The buffer component has a buffer space. The buffer space is connected to the exhaust channel through the first opening to form an exhaust channel. The buffer component is configured to expand under the pressure of the gas in the buffer space.

[0065] The exhaust port is located on the carrier component, and the first opening is located between the exhaust port and the buffer component; and / or, the exhaust port is located on the buffer component.

[0066] Therefore, as the air pressure in the buffer space increases, the buffer component can expand adaptively, thereby temporarily storing and buffering the gas, reducing the impact force of the gas discharged from the exhaust port, and thus protecting the structure in the surrounding environment, further improving the reliability of the battery device.

[0067] In some embodiments, the cushioning component is made of an elastic material.

[0068] Therefore, by making the buffer component an elastic material, it is easy to deform to temporarily store more gas, and it is not easy to burst or be damaged. This helps to improve the buffering effect of the buffer component on gas and improve the reliability of the buffer component.

[0069] In some embodiments, a second control valve is provided at the exhaust port, and the second control valve is configured to control the unidirectional flow of the exhaust port along the exhaust direction;

[0070] Alternatively, the second control valve can be configured to control the opening and closing of the exhaust port.

[0071] Therefore, by installing a second control valve at the exhaust port, the exhaust port can be easily controlled, and the possibility of external gas flowing back into the exhaust port can be reduced.

[0072] In some embodiments, the carrier component has a second opening communicating with the exhaust passage, and a portion of the explosion-proof valve extends into the exhaust passage through the second opening.

[0073] Therefore, by directly covering the outer side of the explosion-proof valve with one end of the carrier component through the second opening, the explosion-proof valve is located directly in the exhaust channel, thus eliminating the need for a docking and connecting structure between the two and improving the convenience of the gas handling mechanism installation and layout.

[0074] In some embodiments, the carrier component is detachably connected to the battery box.

[0075] This allows the gas handling unit to be disassembled and removed, making it convenient to repair, clean, or replace it.

[0076] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments. Attached Figure Description

[0077] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0078] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0079] Figure 2 This is an exploded structural diagram of an embodiment of the battery device of this application;

[0080] Figure 3 This is an exploded structural diagram of a single battery cell according to an embodiment of this application;

[0081] Figure 4 This is a schematic diagram of the assembly structure of an embodiment of the battery device of this application;

[0082] Figure 5 This is a schematic diagram showing the state in which the buffer component and filter component of a battery device according to an embodiment of the present application are not inflated by the airflow;

[0083] Figure 6 This is a schematic diagram showing the state of the buffer component and filter component after being inflated by airflow in an embodiment of the battery device of this application.

[0084] Figure 7 This is a schematic diagram illustrating the cooperation between the cooling component and the current collection component in one embodiment of the battery device of this application;

[0085] Figure 8This is a schematic diagram showing the state of the buffer component and filter component after being inflated by airflow, according to another embodiment of the battery device of this application.

[0086] Explanation of icon numbers:

[0087] 100. Battery assembly; 1. Battery box; 1a. Receptacle; 11. Box cover; 12. Box body; 20. Battery cell; 21. End cap; 21a. Terminal post; 22. Housing; 23. Electrode assembly; 231. Tab; 30. Explosion-proof valve; 40. Gas handling mechanism; 41. Gas passage; 411. Exhaust port; 42. Carrier component; 421. Exhaust passage; 422. First opening; 423. Second opening; 43. Cooling component; 431. Intermediate section; 433. End section; 44. Circulation components; 441, heat exchanger; 4411, condenser; 4413, radiator; 443, connecting pipeline; 445, compressor; 447, throttling element; 449, liquid pump; 45, medium circulation loop; 451, drive structure; 46, flow collection component; 47, nozzle; 48, filter component; 49, buffer component; 491, buffer space; 50, detection mechanism; 200, controller; 300, motor; 1000, vehicle; X, first direction; Y, second direction; Z, third direction.

[0088] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0089] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0090] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0091] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0093] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. A battery device can include a battery box and individual battery cells housed within the battery box. The battery box can include a box body and a cover that closes to the box body to enclose a cavity containing the individual battery cells. The individual battery cell is the smallest unit that makes up a battery, typically including a casing and an electrode assembly housed within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and can include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box can be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0094] Furthermore, when a battery device experiences thermal runaway due to internal short circuits, overcharging, or over-discharging, violent reactions such as electrolyte boiling, decomposition of positive and negative electrode materials, and membrane melting occur, generating a large amount of high-temperature gas inside the battery compartment. Therefore, battery devices in related technologies typically have an explosion-proof valve on the battery compartment to release and depressurize the gas generated inside the battery compartment.

[0095] However, explosion-proof valves only relieve pressure on gases and have little effect on their temperature, resulting in the gas discharged from the valve still being very hot. In this situation, if flammable materials are present in the surrounding environment, or if the gas contains flammable particles, it can easily trigger a secondary fire or explosion, thus affecting the reliability of the battery device.

[0096] Therefore, based on the above considerations, in order to improve the reliability of the battery device, this application proposes a novel battery device. This battery device innovatively features a gas handling mechanism on the outside of the battery box, corresponding to the explosion-proof valve. Gas discharged from the explosion-proof valve can flow through the exhaust channel of the carrier component in the gas handling mechanism, allowing at least part of the cooling component located within the exhaust channel to cool the flowing high-temperature gas, thereby reducing the possibility of secondary fires or explosions and improving the reliability of the battery device.

[0097] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0098] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0099] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, 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. 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0100] 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.

[0101] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell 20; the battery case 1 has a receiving cavity 1a, and the battery cell 20 is disposed inside the battery case 1.

[0102] The battery case 1 can be used to form a receiving cavity 1a to provide a space for accommodating the battery cell 20. The battery case 1 can adopt various structures. In some embodiments, the battery case 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for accommodating the battery cell 20. In this case, the body 12 can provide accommodating support for the battery cell 20. In addition, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate structure and cover the opening side of the body 12. In addition, the battery case 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc. Furthermore, the cover 11 and the body 12 can be arranged along a first direction X.

[0103] A battery cell 20 refers to the smallest unit that makes up the battery device 100. There can be multiple battery cells 20. Multiple battery cells 20 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Furthermore, multiple battery cells 20 can be arranged in one direction to form a battery pack. The battery device 100 may consist of only one battery pack, or it may consist of at least two battery packs arranged side-by-side.

[0104] In addition, the battery device 100 may include other structures, such as busbars, for electrical connection between multiple battery cells 20. Furthermore, each battery cell 20 may be a secondary or primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes.

[0105] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0106] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, giving battery cell 20 higher structural strength and improving reliability. Functional components such as terminals 21a can be provided on end cap 21. Terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating member can also be provided on the inner side of end cap 21. The insulating member can be used to isolate electrical components inside housing 22 from end cap 21 to reduce the risk of short circuit. For example, the insulating element can be made of plastic, rubber, etc.

[0107] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0108] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode plates without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the terminals 21a to form a current loop.

[0109] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, an explosion-proof valve 30 may also be provided on the battery box 1, which may be connected to the accommodating cavity 1a. Thus, when thermal runaway occurs in the battery device 100, when the gas pressure in the accommodating cavity 1a reaches the opening threshold of the explosion-proof valve 30, the explosion-proof valve 30 may be opened to release gas and pressure.

[0110] Since the accommodating space inside the battery box 1 is mainly located within the box body 12, the explosion-proof valve 30 can be installed on the box body 12. For example, the box body 12 may include a bottom plate and a side plate, with the side plate arranged around the periphery of the bottom plate and forming an opening in the box body 12 on the side away from the bottom plate; the side plate may have a mounting hole communicating with the accommodating cavity 1a, through which the explosion-proof valve 30 can be installed. Of course, in other embodiments, the explosion-proof valve 30 may also be completely installed on the outside of the box body 12, in which case a hole communicating with the explosion-proof valve 30 and the accommodating cavity 1a can be opened on the box body 12. Alternatively, in some embodiments, the explosion-proof valve 30 may be installed on the box cover 11. Furthermore, there may be one explosion-proof valve 30 on the battery box 1, or there may be two explosion-proof valves 30, at least the two explosion-proof valves 30 may be located on the same side of the battery box 1, or they may be located on different sides of the battery box 1. It can be seen that this application does not limit the location and number of explosion-proof valves 30.

[0111] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the battery device 100 further includes a gas processing mechanism 40, which is located on the outside of the battery box 1. The gas processing mechanism 40 has a gas channel 41, which is connected to the explosion-proof valve 30. The gas channel 41 has an exhaust port 411. The gas processing mechanism 40 includes a carrier component 42 and a cooling component 43. The carrier component 42 has an exhaust channel 421, which constitutes at least a portion of the gas channel 41. At least a portion of the cooling component 43 is located in the exhaust channel 421. On the exhaust path of the gas channel 41, the cooling component 43 is located upstream of the exhaust port 411.

[0112] Gas passage 41 can be used to allow gas discharged from explosion-proof valve 30 to flow through and guide the gas to be discharged from exhaust port 411, such as Figure 1As shown, the dashed arrows indicate the exhaust path of the gas discharged from the explosion-proof valve 30 within the gas channel 41. The gas channel 41 can extend along a first direction X, with one end connected to the explosion-proof valve 30 and the other end having an exhaust port 411. In this case, the extended shape of the gas channel 41 can be relatively regular, thus improving its manufacturing convenience. Alternatively, the first direction X can be the axial direction of the explosion-proof valve 30, the centerline direction of the pressure relief hole of the explosion-proof valve 30, or the exhaust direction of the explosion-proof valve 30. In this case, the extension direction of the gas channel 41 is consistent with the exhaust direction of the explosion-proof valve 30, which also facilitates the smooth and rapid entry of the gas discharged from the explosion-proof valve 30 into the gas channel 41. Of course, in other embodiments, the gas channel 41 can also be partially extended along the first direction X and partially extended along a second direction Y intersecting the first direction X; when the first direction X is a horizontal direction, the second direction Y can be another horizontal direction or a vertical direction. Therefore, this application does not limit the extended shape of the gas channel 41. Furthermore, in a cross-section perpendicular to the first direction X, the gas passage 41 can be rectangular, square, or circular, etc., and this application does not limit the cross-sectional shape of the gas passage 41. Additionally, the connection between the gas passage 41 and the explosion-proof valve 30 can be achieved by the gas passage 41 having an inlet, which connects to the outlet of the explosion-proof valve 30. Alternatively, the gas processing mechanism 40 can be placed over the outside of the explosion-proof valve 30, with the explosion-proof valve 30 extending directly into the gas passage 41, thus achieving connection between the two. Furthermore, the number of exhaust ports 411 can be one, or at least two. The shape of the exhaust port 411 can be square, rectangular, or circular, etc., and this application does not limit the number or shape of the exhaust ports 411.

[0113] The carrier component 42 can be used to form an exhaust passage 421, thereby constituting at least a portion of the gas passage 41. The exhaust passage 421 constituting at least a portion of the gas passage 41 means that the entire gas passage 41 can be formed by the exhaust passage 421; in other words, the gas passage 41 includes only the exhaust passage 421. In this case, the exhaust port 411 is provided on the carrier component 42. Of course, the exhaust passage 421 can also only constitute a part of the gas passage 41. For example, the gas passage 41 can also be formed by the buffer space 491 of the buffer component 49, as described below. In this case, the exhaust port 411 can be provided on the carrier component 42, or on the buffer component 49, or simultaneously on both the carrier component 42 and the buffer component 49. Furthermore, since the temperature of the gas discharged from the explosion-proof valve 30 is high, the carrier component 42 can be made of metal to provide high-temperature resistance and prevent damage. Of course, the carrier component 42 can also be made of other non-metallic materials; this application does not limit the material type of the carrier component 42. Furthermore, the carrier component 42 can also be used to connect with the housing 12 of the battery box 1, thereby enabling the gas processing mechanism 40 to be installed on the battery box 1. The carrier component 42 can be detachably connected to the housing 12, or it can be connected to the housing 12 by a non-detachable method such as adhesive bonding or welding. This application does not limit the connection method of the carrier component 42 to the housing 12.

[0114] The cooling component 43 can be used to exchange heat with the gas flowing through the exhaust passage 421 to reduce the temperature of the gas. The cooling component 43 being at least partially located within the exhaust passage 421 means that the cooling component 43 can be entirely located within the exhaust passage 421; alternatively, a portion of the exhaust passage 421 can be located within the exhaust passage 421, while a portion is located outside the exhaust passage 421.

[0115] Alternatively, the cooling component 43 can be a thermoelectric cooler, which can also be called a semiconductor cooling chip or a Peltier effect device. Structurally, one end of the cooling component 43 can be formed as a cooling end, and the other end can be formed as a heating end. The cooling end is disposed within the exhaust channel 421, while the heating end is disposed outside the exhaust channel 421. Thus, when the cooling component 43 is energized, the cooling end can perform cooling to cool the flowing gas.

[0116] Of course, the cooling component 43 can also be a metal part with high thermal conductivity, such as a metal part made of copper or aluminum. In this case, part of the cooling component 43 can be placed inside the exhaust channel 421 and part can be placed outside the exhaust channel 421. Then, by utilizing the high thermal conductivity of the metal part, the temperature of the flowing gas can be transferred to the relatively cooler exhaust channel 421. Moreover, in order to further improve the cooling effect on the gas, a fan can be installed on the part of the metal part located outside the exhaust channel 421 for air cooling.

[0117] Alternatively, the cooling component 43 may also be provided with a medium space, as described below, to contain the working medium, so that the gas flowing outside the cooling component 43 can be cooled by phase change cooling or liquid cooling through the working medium. It is evident that this application does not limit the structural type of the cooling component 43, as long as it can cool the gas.

[0118] Furthermore, in the exhaust path of gas passage 41, cooling component 43 is located upstream of exhaust port 411. This exhaust path refers to the airflow path formed when gas, after being discharged from explosion-proof valve 30 into gas passage 41, flows along the extension direction of exhaust passage 421 and then exits from exhaust port 411. Cooling component 43 being located upstream of exhaust port 411 means that gas flows through cooling component 43 first within gas passage 41 before passing through exhaust port 411.

[0119] Furthermore, the cooling component 43 can be tubular, columnar, or plate-shaped; this application does not limit the shape of the cooling component 43. The number of cooling components 43 can be one, or at least two; this application does not limit the number of cooling components 43. Additionally, the cooling component 43 can be connected to the carrier component 42, or it can be connected to another supporting object independent of the carrier component 42. This supporting object can be connected to the carrier component 42 or to the housing 12. Furthermore, the number of gas handling mechanisms 40 can be set according to the number of explosion-proof valves 30.

[0120] In the technical solution of this application, a gas handling mechanism 40 is provided on the outside of the battery box 1. The gas handling mechanism 40 includes a carrier component 42 and a cooling component 43. The exhaust channel 421 of the carrier component 42 can communicate with the explosion-proof valve 30, and the cooling component 43 is at least partially disposed in the exhaust channel 421. Thus, when the battery device 100 experiences thermal runaway and is depressurized by the explosion-proof valve 30, the discharged gas can enter and flow through the exhaust channel 421. At this time, the cooling component 43 can exchange heat with the gas flowing through the exhaust channel 421, thereby lowering the gas temperature and reducing its volume. This allows the relatively low-temperature gas with relatively low impact force to be discharged from the exhaust port 411, reducing the possibility of secondary fire or explosion caused by excessively high temperature of the discharged gas, and also reducing the possibility of impact damage to surrounding structures caused by excessive impact of the discharged gas. Furthermore, the gas handling mechanism 40 is located on the outside of the battery box 1, ensuring that it does not obstruct the discharge of gas from the battery box 1. This allows the explosion-proof valve 30 to quickly discharge and depressurize the gas inside the battery box 1, reducing the possibility of an explosion due to excessive gas pressure buildup. Therefore, the optimized structure of the battery device 100 in this solution can reduce the temperature and impact force of the discharged gas while maintaining the discharge and depressurization efficiency of the explosion-proof valve 30. This prevents an explosion inside the battery box 1 due to excessive gas pressure, and also prevents secondary fires, explosions, or impact damage on the outside of the battery box 1 due to excessive temperature and impact force of the discharged gas. This ensures reliable stability both inside and outside the battery box 1, thereby improving the reliability of the battery device 100.

[0121] In one embodiment of this application, the cooling component 43 is provided with a medium space, and a working medium is provided in the medium space.

[0122] The medium space can be used to contain the working medium. The medium space can be enclosed, meaning the working medium can only reside within it. Alternatively, the medium space can be connected to the circulation component 44, forming a medium circulation loop 45, as described below, allowing the working medium to circulate between the medium space and the circulation component 44. The working medium can exchange heat with the gas flowing outside the cooling component 43, absorbing heat from the gas to cool it. The working medium can be water, a water-ethylene glycol mixture, ammonia, fluorinated liquid, or paraffin, etc.; this application does not limit the type of working medium. After heat exchange with the gas flowing outside the cooling component 43, the working medium may undergo a phase change, such as a liquid-gas phase change or a solid-liquid phase change, to achieve cooling through the latent heat of phase change. Alternatively, the working medium may not undergo a phase change, for example, remaining liquid but absorbing heat and increasing in temperature, thus achieving cooling through the sensible heat of phase change. In addition, since the working medium is located inside the cooling component 43, the material of the cooling component 43 can be set as a heat-conducting material, such as copper or aluminum, to facilitate heat conduction between the working medium and the gas.

[0123] In this embodiment, the working medium can be contained in the medium space of the cooling component 43. After the working medium exchanges heat with the cooling component 43, it can absorb more heat from the gas through latent heat or sensible heat of phase change, thereby improving the cooling effect on the gas.

[0124] In one embodiment of this application, the medium space is enclosed, and a wick can be provided inside the cooling component 43. In this case, the cooling component 43 can constitute a conventional type of heat pipe. A heat pipe is a heat transfer element with extremely high thermal conductivity. It transfers heat through the phase change of evaporation and condensation of the working medium within a fully enclosed vacuum tube, utilizing capillary action to drive the working medium to flow and form a circulation. Therefore, the cooling component 43 can include an evaporation section and a condensation section, and a wick is provided in both the evaporation section and the condensation section; the evaporation section can be located inside the exhaust channel 421, and the condensation section can be located outside the exhaust channel 421.

[0125] In this embodiment, the working medium located in the evaporation section can vaporize after absorbing heat from the gas, resulting in a higher vapor pressure in the evaporation section than in the condensation section. Driven by this pressure difference, the heat-carrying vapor flows from the evaporation section to the relatively lower-temperature condensation section, where it undergoes exothermic condensation, thus transferring heat from the gas to the condensation section. The working medium condensed into a liquid state in the condensation section can then flow back to the evaporation section under the capillary force of the wick, achieving circulation of the working medium within the heat pipe. In this case, the structure of the cooling component 43 is relatively simple, which facilitates its manufacturing and installation. Furthermore, the cooling component 43 is a closed structure, making it less prone to leakage. Additionally, to further improve the cooling effect on the gas, a fan can be installed outside the exhaust channel 421 to provide air cooling for the condensation section.

[0126] In one embodiment of this application, the medium space is enclosed, and the cooling component 43 may not contain a liquid wick. In this case, the cooling component 43 can constitute a phase change energy storage structure. The working medium can be a phase change material, such as paraffin or hydrated salt, which utilizes solid-liquid phase change to absorb heat from the gas. Moreover, the cooling component 43 can be entirely housed within the exhaust channel 421.

[0127] Please refer to Figure 5 and Figure 6 In one embodiment of this application, the gas processing mechanism 40 further includes a circulation component 44, which is in communication with the medium space to form a medium circulation loop 45; the circulation component 44 includes a heat exchanger 441, which is disposed outside the exhaust passage 421; the medium circulation loop 45 has a drive structure 451, which is configured to drive the working medium to flow in the medium circulation loop 45.

[0128] The medium circulation loop 45, that is, after the working medium flows out of the cooling component 43, it can enter the circulation assembly 44 and then return to the cooling component 43 to form a closed loop flow path, such as... Figure 6 As shown, the dashed arrows indicate the flow path of the working medium in the medium circulation loop 45. The circulation assembly 44 may consist only of the heat exchanger 441, or it may further include other components, such as the connecting pipeline 443, compressor 445, and throttling element 447, as described below. The heat exchanger 441 is used to exchange heat for the flowing working medium. The heat exchanger 441 can be a condenser 4411, or it can be a radiator 4413. The drive structure 451 is used to provide power to the working medium to drive its flow.

[0129] In this embodiment, a medium circulation loop 45 is formed by the circulation assembly 44 including the heat exchanger 441 and the cooling component 43. After the working medium in the cooling component 43 exchanges heat with the gas outside the cooling component 43, it carries the heat of the gas further to the heat exchanger 441. The heat exchanger 441 lowers the temperature of the working medium, allowing it to re-enter the cooling component 43 and continue to cool the gas outside the cooling component 43. This circulation of the working medium in the medium circulation loop 45 creates a cooling cycle, enabling the gas processing mechanism 40 to continuously cool the gas in the exhaust channel 421, thereby further improving the cooling effect on the gas.

[0130] Please refer to Figure 6 In one embodiment of this application, the heat exchanger 441 is a condenser 4411, and the circulation assembly 44 further includes a connecting pipeline 443, a compressor 445, and a throttling element 447; the compressor 445, the condenser 4411, and the throttling element 447 are connected in series in the connecting pipeline 443, and the connecting pipeline 443 is connected to the medium space channel to form a closed loop, and the compressor 445 is configured as a drive structure 451.

[0131] In the medium circulation loop 45, the condenser 4411 can be located between the compressor 445 and the throttling element 447. The throttling element 447 can be a capillary tube or an expansion valve.

[0132] In this embodiment, after the low-temperature, low-pressure liquid working medium inside the cooling component 43 exchanges heat with the gas outside, the working medium absorbs heat from the gas and transforms into a low-temperature, low-pressure gas. The working medium then enters the compressor 445, which compresses it to form a high-temperature, high-pressure gas, creating a pressure difference in the medium circulation loop 45 and generating the flow force for the working medium. Thus, the compressor 445 forms the drive structure 451. The working medium then enters the condenser 4411, releasing heat and condensing into a high-pressure, medium-temperature liquid. Finally, the working medium enters the throttling element 447, forming a low-pressure, low-temperature liquid, so that when it returns to the cooling component 43, it can again exchange heat with and cool the gas outside the cooling component 43. During this process, because the low-temperature, low-pressure liquid working medium vaporizes at a constant temperature and pressure in the cooling component 43, its enormous latent heat of vaporization absorbs a large amount of heat, resulting in a highly efficient and stable cooling effect. The compressor 445 and the condenser 4411 may be mounted on the carrier component 42.

[0133] Please refer to Figure 8In one embodiment of this application, the heat exchanger 441 is a radiator 4413, and the circulation component 44 further includes a connecting pipeline 443 and a liquid pump 449; the liquid pump 449 and the radiator 4413 are connected in series in the connecting pipeline 443, the connecting pipeline 443 is connected to the medium space channel to form a closed loop, and the liquid pump 449 is configured as a drive structure 451.

[0134] In this embodiment, after the liquid working medium inside the cooling component 43 exchanges heat with the gas outside, the working medium absorbs the heat from the gas and remains liquid, only its temperature rises. After heating, the working medium can enter the radiator 4413, where it dissipates heat and cools down, allowing it to return to the cooling component 43 and continue to cool the gas outside. This allows for cooling and circulating the gas in the exhaust channel 421 while reducing the number of components in the medium circulation loop 45, thus improving the ease of manufacturing and installation of the gas handling mechanism 40. The liquid pump 449 and the radiator 4413 can be mounted on the carrier component 42. Additionally, the liquid pump 449 can be positioned between the radiator 4413 and the cooling component 43 in the medium circulation loop 45. Furthermore, to further improve the cooling effect on the gas, a fan can be installed outside the exhaust channel 421 to provide air cooling for the radiator 4413, or a liquid cooling channel can be provided inside the radiator 4413 for liquid cooling.

[0135] In one embodiment of this application, the cooling component 43 and the circulation component 44 can also constitute a loop heat pipe. In this case, a capillary wick can be provided within the cooling component 43 to form an evaporator for the loop heat pipe, and the capillary wick can be formed as a drive structure 451. The cooling component 43 can also be formed as a condenser 4411 for the loop heat pipe. The circulation mechanism can also include a steam line and a liquid line, with the steam line connecting the outlet of the cooling component 43 to the inlet of the condenser 4411, and the liquid line connecting the outlet of the condenser 4411 to the inlet of the cooling component 43. In this case, the loop heat pipe, due to its high thermal conductivity, has a better heat absorption effect on the gas outside the cooling component 43, thereby improving the cooling effect on the gas. Simultaneously, the use of a liquid wick within the evaporator as the drive structure 451 in the loop heat pipe, driving the flow of the working medium through capillary action, gives the gas handling mechanism 40 the advantage of energy saving. Furthermore, the main difference between this loop heat pipe and the traditional type of heat pipe described above is that the evaporation and condensation sections of the traditional heat pipe are integrated structures, and both sections have wicks; while the loop heat pipe has a separate structure for the evaporator and condenser 4411, connected to the liquid line via a vapor line, and only the evaporator has a wick. In addition, to further improve the cooling effect on the gas, a fan can be installed outside the exhaust channel 421 to provide air cooling for the condenser 4411.

[0136] Please refer to the reference. Figure 6 and Figure 7 In one embodiment of this application, the number of cooling components 43 is at least two, and the gas processing mechanism 40 also includes two flow collectors 46; at least two cooling components 43 are connected in parallel between the two flow collectors 46, and the circulation component 44 is connected in series with the two flow collectors 46.

[0137] One manifold 46 can be connected to the outlets of at least two cooling components 43. Another manifold 46 can be connected to the inlets of at least two cooling components 43. The inlet and outlet of the circulation assembly 44 can be connected to the two manifolds 46 respectively. Since the manifold 46 is located between the cooling components 43 and the circulation assembly 44, the manifold 46 can also be configured as part of the medium circulation loop 45.

[0138] In this embodiment, setting the number of cooling components 43 to at least two increases the heat exchange area with the gas in the exhaust channel 421, thereby further improving the cooling effect on the gas. The arrangement of two manifolds 46 allows at least two cooling components 43 to share a single circulation assembly 44, reducing the number of circulation assemblies 44 required and improving the ease of manufacturing and installation of the gas handling mechanism 40. The circulation assembly 44 can be connected in series with the two manifolds 46 via the connecting pipe described above, or via the steam and liquid pipelines described above.

[0139] Of course, in other embodiments, the number of circulation components 44 may correspond to the number of cooling components 43, and each circulation component 44 and a cooling component 43 may be connected to form a medium circulation loop 45.

[0140] Please refer to Figure 6 In one embodiment of this application, the battery device 100 further includes a detection mechanism 50, which is disposed in the accommodating cavity 1a or the exhaust channel 421; the detection mechanism 50 is configured to detect whether the battery device 100 has experienced thermal runaway and is electrically connected to the drive structure 451.

[0141] The detection mechanism 50 can be used to detect whether the battery device 100 has experienced thermal runaway, so as to promptly trigger the start signal of the drive structure 451 after detecting thermal runaway. When thermal runaway occurs in the battery device 100, temperature and pressure will change. Therefore, the detection mechanism 50 can be a temperature sensor or a pressure sensor as described below, to determine whether thermal runaway has occurred by detecting temperature or pressure changes within the accommodating cavity 1a or the exhaust channel 421. Furthermore, since some characteristic gases, including carbon monoxide, hydrogen, or carbon dioxide, are generated when the battery device 100 experiences thermal runaway, the detection mechanism 50 can also be configured as a gas sensor to determine whether thermal runaway has occurred by detecting specific characteristic gases. Therefore, this application does not limit the type of the detection mechanism 50, as long as it can be used to detect whether thermal runaway has occurred in the battery device 100. Additionally, when the drive structure 451 needs to be electrically connected to the detection mechanism 50, the drive structure 451 can be a compressor 445 or a liquid pump 449 as described above. When the drive structure 451 is the liquid aspiration core described above, it is not necessary to electrically connect it to the detection mechanism 50.

[0142] In this embodiment, the detection mechanism 50 and the drive structure 451 are linked. That is, after the detection mechanism 50 detects thermal runaway in the battery device 100, the drive structure 451 can be activated to open the medium circulation loop 45 to cool the gas in the exhaust channel 421. At this time, the medium circulation loop 45 is activated after the detection mechanism 50 detects thermal runaway in the battery device 100, which can reduce energy consumption costs.

[0143] In one embodiment of this application, the battery device 100 further includes a battery management system, and the battery cell 20, the drive structure 451, and the detection mechanism 50 are electrically connected to the battery management system.

[0144] In this embodiment, since the drive structure 451 and the detection mechanism 50 are electrically connected to the battery management system, the detection mechanism 50 can transmit a thermal runaway signal to the battery management system after detecting thermal runaway in the battery device 100. The battery management system can then promptly control the drive structure 451 to start, so that the medium circulation loop 45 can cool the gas discharged from the explosion-proof valve 30. At this time, since the battery management system is directly used to control the drive structure 451, the control of the drive structure 451 is integrated into the battery management system, simplifying the structural setup. Simultaneously, the battery management system is also electrically connected to the battery cell 20, allowing it to promptly control the battery cell 20 to perform protective measures such as power-off upon receiving a thermal runaway signal, further improving the reliability of the battery device 100.

[0145] Of course, in other embodiments, the gas processing mechanism 40 itself may be provided with a controller 200 to control the start and stop of the drive structure 451.

[0146] In one embodiment of this application, the detection mechanism 50 includes at least one of a pressure sensor and a temperature sensor.

[0147] In this embodiment, the detection mechanism 50 is configured to include at least one of a force sensor and a temperature sensor, so that the detection mechanism 50 can determine whether thermal runaway has occurred by detecting pressure or temperature information. After thermal runaway occurs in the battery device 100, the pressure and temperature at various points in the exhaust channel 421 and the accommodating cavity 1a show significant changes, which facilitates the detection mechanism 50 to detect these changes and improves the detection accuracy of whether thermal runaway has occurred in the battery device 100.

[0148] In one embodiment of this application, the detection mechanism 50 may be disposed within the exhaust channel 421 and located upstream of the cooling component 43 in the exhaust path. In this case, disposing of the detection mechanism 50 within the exhaust channel 421 ensures that it does not affect the structure inside the battery box 1, thereby eliminating the need to adjust the structure inside the battery box 1.

[0149] In one embodiment of this application, the circulation component 44 is disposed on the outside of the exhaust passage 421.

[0150] In this embodiment, the circulation component 44 is positioned outside the exhaust channel 421. This reduces the impact of the high-temperature gas discharged from the explosion-proof valve 30 on the circulation component 44. It also reduces the space occupied within the exhaust channel 421, allowing for the placement of a sufficiently large cooling component 43 to increase the heat exchange area with the gas, thereby improving the cooling effect. Simultaneously, it also ensures the exhaust efficiency of the exhaust channel 421. Furthermore, the aforementioned collector 46 can also be positioned outside the exhaust channel 421.

[0151] Please refer to Figure 6 In one embodiment of this application, the gas processing mechanism 40 further includes a nozzle 47 and a first control valve. The nozzle 47 is in communication with the medium space and the exhaust passage 421. The first control valve is electrically connected to the nozzle 47 and configured to control the opening and closing of the nozzle 47.

[0152] Nozzle 47 is used to spray the working medium in the medium space into the exhaust channel 421 to cool the gas in the exhaust channel 421. The number of nozzles 47 can be one or at least two, and they can be arranged along the extension direction of the cooling component 43 to form one or at least two sets. When at least two sets of nozzles 47 are formed, they can be arranged circumferentially along the cooling component 43. Furthermore, when there are at least two cooling components 43, nozzles 47 can be provided on only some of the cooling components 43 or on all of the cooling components 43. When nozzles 47 are provided on at least two cooling components 43, the spray direction of the nozzles 47 on different cooling components 43 can be set to the same or different directions. A first control valve is used to control the opening and closing of the nozzle 47. The first control valve can be a solenoid valve or an electric valve, etc.

[0153] In this embodiment, a nozzle 47 and a first control valve are provided on the cooling component 43, so that the nozzle 47 can be opened by the first control valve, allowing some of the working medium flowing through the cooling component 43 to be sprayed into the exhaust channel 421. At this time, the working medium located in the cooling component 43 can indirectly exchange heat with the gas in the exhaust channel 421, while the working medium sprayed into the exhaust channel 421 directly exchanges heat with the gas, thereby further improving the cooling effect on the gas.

[0154] Furthermore, when the nozzle 47 is provided on the cooling component 43, it can be used in conjunction with the circulation component 44 described above, since it requires the consumption of working medium. Moreover, to facilitate the replenishment of the working medium, the circulation mechanism may also include a reservoir for storing the working medium. This reservoir can be connected to a connecting pipe via a replenishment line, so that after the replenishment line is opened by the valve structure, the working medium in the reservoir can enter the connecting pipe for replenishment.

[0155] In one embodiment of this application, the first control valve is electrically connected to the battery management system.

[0156] In this embodiment, the first control valve is electrically connected to the battery management system, so that the control of the first control valve can also be integrated into the battery management system, thereby simplifying the structural design.

[0157] Please refer to Figure 6 In one embodiment of this application, the exhaust passage 421 extends along the first direction X, and the cooling component 43 extends along the first direction X.

[0158] The cooling component 43 extends along the first direction X, which means that the cooling component 43 extends along the first direction X as a whole. At this time, the cooling component 43 can be linear, or it can be wavy or spiral.

[0159] In this embodiment, the cooling component 43 is extended along the extension direction of the exhaust channel 421, so that the space of the exhaust channel 421 in the extension direction can be used to install the cooling component 43 of the required size, thereby increasing the heat exchange area with the gas and improving the cooling effect on the gas.

[0160] Please refer to Figure 6 In one embodiment of this application, the cooling component 43 includes an intermediate section 431 and two end sections 433. The intermediate section 431 extends along a first direction X. The two end sections 433 are respectively disposed at both ends of the intermediate section 431 in the first direction X and are bent and connected to the intermediate section 431.

[0161] The connection is a bend, meaning that the extension direction of the intermediate section 431 is different from the extension direction of the end section 433, and the two are set at an angle. For example, the intermediate section 431 extends along the first direction X, or along the extension direction of the exhaust passage 421, while the end section 433 extends along a direction intersecting the first direction X, or along the radial direction of the exhaust passage 421.

[0162] In this embodiment, the cooling component 43 is configured to include an intermediate section 431 and two end sections 433, allowing convenient communication with the circulation component 44 located outside the exhaust passage 421 via the two end sections 433. The end sections 433, located away from the intermediate section 431, can also be connected to the carrier component 42. Alternatively, the end sections 433 can be connected only to the circulation component 44. Furthermore, the nozzle 47 described above can be disposed on the intermediate section 431, or it can be disposed on both the intermediate section 431 and the end sections 433.

[0163] Please refer to Figure 6 In one embodiment of this application, at least a portion of the intermediate segment 431 is bent.

[0164] The bending setting refers to the middle section 431 protruding to at least one side in a direction that forms an angle with the first direction X to form a non-linear protrusion, for example, the protrusion can be V-shaped, C-shaped or U-shaped, etc.

[0165] In this embodiment, at least a portion of the intermediate section 431 is bent, which can increase the heat exchange area with the gas, thereby improving the cooling effect on the gas.

[0166] Please refer to Figure 6 In one embodiment of this application, the intermediate segment 431 is arranged in a wavy or spiral shape.

[0167] In this embodiment, the middle section 431 is set to be wavy or spiral, with more bends, which helps to increase the heat exchange area with the gas and improve the cooling effect on the gas.

[0168] Of course, in other embodiments, the intermediate segment 431 may also have only one bend.

[0169] Please refer to the reference. Figure 6 and Figure 7 In one embodiment of this application, the number of cooling components 43 is at least two, and the at least two cooling components 43 are arranged side by side at intervals in a direction intersecting the first direction X.

[0170] When the first direction X is a horizontal direction, at least two cooling components 43 can be arranged side-by-side with a linear spacing in another horizontal or vertical direction. For example, at least two cooling components 43 can be arranged with a spacing along a second direction Y, which intersects the first direction X. Of course, at least two cooling components 43 can also be arranged side-by-side with a spacing along an arc in the circumference of the exhaust channel 421. This application does not limit the arrangement of at least two cooling components 43.

[0171] In this embodiment, at least two cooling components 43 are arranged side by side at intervals in a direction intersecting the first direction X, so that there is no obstruction between the at least two cooling components 43 and both can come into contact with the flowing gas, thereby increasing the heat exchange area between the cooling components 43 and the gas and improving the heat exchange and cooling effect on the gas.

[0172] Please refer to Figure 6 In one embodiment of this application, in order to facilitate the installation and arrangement of the circulation component 44 and to take into account the exhaust efficiency of the exhaust port 411, the exhaust port 411 can be located on one side of the carrier component 42 in the third direction Z, and the circulation component 44 can be located on the other side of the carrier component 42 in the third direction Z, and located outside the exhaust channel 421. In this case, the exhaust of the circulation component 44 and the exhaust of the exhaust port 411 are less likely to interfere with each other.

[0173] Please refer to Figure 5 In one embodiment of this application, the gas processing mechanism 40 further includes a filter element 48, at least a portion of which is disposed within the exhaust channel 421. The filter element 48 is provided with a plurality of filter holes. On the exhaust path of the gas channel 41, the filter element 48 is located upstream of the exhaust port 411.

[0174] The filter element 48 can be used to filter particulate matter from flowing gas. The filter element 48 can be a flexible filter membrane, such as a polyester fiber membrane, a composite nonwoven membrane, or a nanofiber membrane. Alternatively, the filter element 48 can be a rigid filter membrane, such as a ceramic membrane or a sintered metal membrane. It can also be a metal mesh. Therefore, this application does not limit the structural type of the filter element 48. Furthermore, the number of filter elements 48 can be one, or at least two. When at least two filter elements 48 are provided, they can be arranged along the exhaust path of the exhaust channel 421. Moreover, the size of the filter holes in the at least two filter elements 48 can be different, or they can be the same. In addition, the filter element 48 is located upstream of the exhaust port 411, meaning that the gas in the exhaust channel 421 flows through the filter element 48 first, and then exits from the exhaust port 411. Furthermore, regarding the relative positional relationship between the filter element 48 and the cooling element 43, the filter element 48 can be located downstream of the cooling element 43, meaning that the gas in the exhaust channel 421 first flows through the cooling element 43 and then through the filter element 48. Alternatively, the filter element 48 can be located upstream of the cooling element 43, meaning that the gas in the exhaust channel 421 first flows through the filter element 48 and then through the cooling element 43. Moreover, the filter element 48 can be connected to the carrier element 42 by adhesive bonding or screw connection, etc. This application does not limit the connection method of the filter element 48.

[0175] In this embodiment, a filter element 48 is also provided in the exhaust channel 421, so that particulate matter mixed in the gas can be filtered through the filter element 48, reducing the possibility of harmful substances being discharged from the exhaust port 411 and causing pollution to the surrounding environment, and further improving the reliability of the battery device 100.

[0176] Please refer to Figure 5 In one embodiment of this application, the filter element 48 is located downstream of the cooling element 43 in the exhaust path of the gas passage 41.

[0177] In this embodiment, the filter element 48 is located downstream of the cooling element 43, so that the high-temperature gas discharged from the explosion-proof valve 30 can be cooled down by the cooling element 43 before passing through the filter element 48. This reduces the possibility of the filter element 48 being damaged by the high-temperature gas and improves the service life and reliability of the filter element 48.

[0178] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the filter element 48 is a flexible filter membrane.

[0179] Figure 5The image shows the filter element 48 in a state where it is not inflated by the airflow. Figure 6 The image shows the state in which the filter element 48 is inflated by the airflow.

[0180] In this embodiment, the filter element 48 is configured as a flexible filter membrane. When gas flows to the filter element 48, its flexibility allows it to adaptively expand in response to the airflow impact, buffering the shock and reducing the possibility of damage or connection failure. This further improves the reliability of the filter element 48. Furthermore, the expansion of the filter element 48 increases its surface area and thus the contact area with the gas, thereby improving filtration efficiency.

[0181] Please refer to Figure 5 In one embodiment of this application, the number of filter components 48 is at least two, and the at least two filter components 48 are arranged sequentially along the exhaust path of the exhaust channel 421; at least two filter components 48 have filter holes of different sizes, and in any two filter components 48 with different filter holes, the filter hole of the filter component 48 located upstream on the exhaust path of the exhaust channel 421 is larger than the filter hole of the filter component 48 located downstream.

[0182] In this embodiment, the number of filter elements 48 is set to at least two, and the filter holes of the filter element 48 through which the gas flows first are smaller than the filter holes of the filter element 48 through which the gas flows later, so that the at least two filter elements 48 can form a stepped filter structure to filter particles of different sizes layer by layer, thereby improving filtration efficiency and filtration effect.

[0183] Please refer to Figure 5 In one embodiment of this application, to balance filtration effectiveness and structural simplicity, the number of filter elements 48 can be set to three. In this case, along the exhaust path of the exhaust channel 421, the pore size of the initial filter element 48 can be set to be greater than 100 μm to intercept large particles and molten metal clumps. The pore size of the intermediate filter element 48 can be set to be greater than or equal to 20 μm and less than or equal to 100 μm to capture fine particles and aerosols. The pore size of the final filter element 48 can be set to be less than 20 μm for efficient filtration of micron- and submicron-sized particles.

[0184] Please refer to the reference. Figure 5 and Figure 6In one embodiment of this application, the carrier component 42 has a first opening 422 communicating with the exhaust channel 421, and the gas processing mechanism 40 further includes a buffer component 49; the buffer component 49 covers the first opening 422, the buffer component 49 is provided with a buffer space 491, the buffer space 491 communicates with the exhaust channel 421 through the first opening 422 to form the exhaust channel 421, and the buffer component 49 is configured to expand under the pressure of the gas in the buffer space 491.

[0185] The carrier component 42 can be connected to the explosion-proof valve 30 at one end and have a first opening 422 at the other end. The end of the carrier component 42 with the first opening 422 can be open, forming the first opening 422. Alternatively, the end of the carrier component 42 with the first opening 422 can have an end plate intersecting the first direction X, with the first opening 422 formed on the end plate. Furthermore, the first opening 422 can be square, rectangular, or circular. The buffer component 49 can be used to form a buffer space 491 for buffering and temporarily storing gas. The buffer component 49 is configured to expand under the pressure of the gas within the buffer space 491; that is, when the gas is buffered and temporarily stored in the buffer space 491, the buffer component 49 can undergo elastic deformation or plastic deformation to expand accordingly. Therefore, the material of the buffer component 49 can be an elastic material, such as rubber or silicone, or a non-elastic material that can undergo plastic deformation, such as a multi-layer aluminum foil composite film, with a multi-layer structure consisting of nylon, aluminum foil, and polyethylene from the outside to the inside. It is evident that this application does not limit the material of the buffer component 49, as long as it can deform and expand after gas enters the buffer space 491. Figure 5 The image shows the buffer component 49 in a state where it is not inflated by the airflow. Figure 6 The image shows the state in which the buffer component 49 is inflated by the airflow. Furthermore, the buffer component 49 can be connected to the carrier component 42 by adhesive bonding or screw connection, etc. This application does not limit the connection method of the buffer component 49.

[0186] In this embodiment, when gas enters the buffer space 491, as the gas pressure in the buffer space 491 increases, the buffer component 49 can adaptively expand accordingly, thereby temporarily storing and buffering the gas, reducing the impact force of the gas discharged from the gas exhaust port 411, and thus protecting the structure in the surrounding environment, further improving the reliability of the battery device 100.

[0187] Furthermore, when the gas handling mechanism 40 includes a buffer component 49, the exhaust port 411 can be located on the carrier component 42, and the first opening 422 is located between the exhaust port 411 and the buffer component 49. In other words, the exhaust port 411 is closer to the explosion-proof valve 30 than the first opening 422. It should be noted that although the exhaust port 411 is located on the side of the first opening 422 closer to the explosion-proof valve 30, and the buffer component 49 is located on the side of the first opening 422 farther from the explosion-proof valve 30, the large volume and high flow velocity of the gas in the exhaust channel 421 cause the gas in the exhaust channel 421 to primarily flow along the direction of the exhaust channel 421 through the first opening 422 into the buffer chamber of the buffer component 49. This allows the buffer component 49 to temporarily store and buffer the gas discharged from the explosion-proof valve 30.

[0188] Of course, in some embodiments, the vent 411 may also be provided on the buffer member 49. Alternatively, the vent 411 may be provided on both the carrier member 42 and the buffer member 49.

[0189] In addition, in order to facilitate the formation of the buffer space 491 and to facilitate the receiving and collection of gas, the buffer space 491 of the buffer component 49 can be pre-filled with a portion of gas.

[0190] In one embodiment of this application, the buffer member 49 is made of an elastic material.

[0191] In this embodiment, the buffer component 49 is made of an elastic material, which allows it to deform easily to temporarily store more gas, while also preventing it from bursting or breaking. This improves the buffering effect of the buffer component 49 on the gas and enhances its reliability. Furthermore, it facilitates the reuse of the gas processing mechanism 40.

[0192] Alternatively, the buffer component 49 can be configured as an airbag with one open end, and then covered at the first opening 422 through the open end. In this case, it is convenient for the buffer component 49 to form a buffer space 491 of the required initial size.

[0193] In one embodiment of this application, a second control valve is provided at the exhaust port 411. The second control valve is configured to control the unidirectional flow of the exhaust port 411 along the exhaust direction; or, the second control valve is configured to control the opening and closing of the exhaust port 411.

[0194] In this embodiment, by providing a second control valve at the exhaust port 411, the exhaust port 411 can be easily controlled, and the possibility of backflow of external gas through the exhaust port 411 can be reduced. When the exhaust port 411 is located on the carrier component 42, the second control valve can be configured as a one-way valve to control the unidirectional flow of the exhaust port 411 in the exhaust direction. When the exhaust port 411 is located on the buffer component 49, and the buffer component 49 is made of an elastic material as described above, the second control valve can be configured as a solenoid valve or an electric valve to control the opening and closing of the exhaust port 411, thereby facilitating the opening of the exhaust port 411 for exhaust only when the air pressure within the buffer space 491 of the buffer component 49 reaches a threshold.

[0195] Of course, when the exhaust port 411 is installed on the carrier component 42, the second control valve can also be a solenoid valve or an electric valve to control the opening and closing of the exhaust port 411.

[0196] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the carrier component 42 has a second opening 423 communicating with the exhaust channel 421, and a portion of the explosion-proof valve 30 extends into the exhaust channel 421 through the second opening 423.

[0197] In this embodiment, the carrier component 42 is directly covered by the explosion-proof valve 30 through one end of the second opening 423, so that the explosion-proof valve 30 is directly located in the exhaust channel 421, thus eliminating the need for a docking and communication structure between the two and improving the convenience of installing and arranging the gas handling mechanism 40. The end of the carrier component 42 with the second opening 423 can be open to form the second opening 423. Alternatively, the end of the carrier component 42 with the second opening 423 can have an end plate intersecting the first direction X, with the second opening 423 formed on the end plate. Furthermore, the second opening 423 can be square, rectangular, or circular.

[0198] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of the application, the carrier component 42 can extend along the first direction X to make the shape of the carrier component 42 more regular and easier to manufacture. In this case, the first opening 422 and the second opening 423 described above can be respectively provided at both ends of the carrier component 42 in the first direction X.

[0199] In one embodiment of this application, the carrier component 42 is detachably connected to the battery box 1.

[0200] In this embodiment, the carrier component 42 is detachably connected to the battery box 1, allowing the gas processing mechanism 40 to be removed for easy maintenance, cleaning, or replacement. The carrier component 42 can be connected by screws or clips; this application does not limit the detachable connection method of the carrier component 42 to the battery box 1. Furthermore, the carrier component 42 may have a flange surrounding the second opening 423 at one end, allowing it to be connected to the battery box 1 via this flange.

[0201] Please refer to the reference. Figures 2 to 7In one embodiment of this application, the battery device 100 includes a battery box 1, battery cells 20, an explosion-proof valve 30, and a gas handling mechanism 40. The battery box 1 has a receiving cavity 1a; the battery cells 20 are disposed within the receiving cavity 1a; the explosion-proof valve 30 is disposed in the battery box 1 and communicates with the receiving cavity 1a; the gas handling mechanism 40 is disposed outside the battery box 1, and the gas handling mechanism 40 has a gas channel 41, which communicates with the explosion-proof valve 30, and the gas channel 41 has an exhaust port 411; the gas handling mechanism 40 includes a carrier component 42 and a cooling component 43, the carrier component 42 has an exhaust channel 421, and the exhaust channel 421 constitutes at least a portion of the gas channel 41; at least a portion of the cooling component 43 is disposed within the exhaust channel 421, and the cooling component 43 is located upstream of the exhaust port 411 on the exhaust path of the gas channel 41. The cooling component 43 has a medium space, and a working medium is disposed within the medium space. The gas handling mechanism 40 also includes a circulation assembly 44, which is connected to the medium space to form a medium circulation loop 45. The circulation assembly 44 includes a heat exchanger 441, which is located outside the exhaust passage 421. The medium circulation loop 45 has a drive structure 451, which is configured to drive the working medium to flow in the medium circulation loop 45. The heat exchanger 441 is a condenser 4411. The circulation assembly 44 also includes a connecting pipeline 443, a compressor 445, and a throttling element 447. The compressor 445, the condenser 4411, and the throttling element 447 are connected in series in the connecting pipeline 443, which is connected to the medium space passage to form a closed loop. The compressor 445 is configured as the drive structure 451. The number of cooling components 43 is at least two. The gas handling mechanism 40 also includes two manifolds 46. At least two cooling components 43 are connected in parallel between the two manifolds 46, and the circulation assembly 44 is connected in series with the two manifolds 46. The battery device 100 also includes a detection mechanism 50, which is disposed within the accommodating cavity 1a or the exhaust channel 421. The detection mechanism 50 is configured to detect whether thermal runaway has occurred in the battery device 100 and is electrically connected to the drive structure 451. The battery device 100 also includes a battery management system, to which the battery cell 20, the drive structure 451, and the detection mechanism 50 are electrically connected. The detection mechanism 50 includes at least one of a pressure sensor and a temperature sensor. The circulation assembly 44 is disposed outside the exhaust channel 421. The gas handling mechanism 40 also includes a nozzle 47 and a first control valve. The nozzle 47 communicates with the medium space and the exhaust channel 421. The first control valve is electrically connected to the nozzle 47 and configured to control the opening and closing of the nozzle 47. The first control valve is electrically connected to the battery management system. The exhaust channel 421 extends along a first direction X, and the cooling component 43 extends along the first direction X.The cooling component 43 includes an intermediate section 431 and two end sections 433. The intermediate section 431 extends along a first direction X. The two end sections 433 are respectively located at both ends of the intermediate section 431 in the first direction X and are bent and connected to the end sections 433. At least a portion of the intermediate section 431 is bent. The intermediate section 431 is wavy or spiral. At least two cooling components 43 are arranged side-by-side at intervals in directions intersecting the first direction X. The gas processing mechanism 40 also includes a filter component 48. At least a portion of the filter component 48 is located within the exhaust channel 421. The filter component 48 has multiple filter holes. In the exhaust path of the gas channel 41, the filter component 48 is located upstream of the exhaust port 411. In the exhaust path of the gas channel 41, the filter component 48 is located downstream of the cooling component 43. The filter component 48 is a flexible filter membrane. The number of filter elements 48 is at least two, and the at least two filter elements 48 are arranged sequentially along the exhaust path of the exhaust channel 421; at least two filter elements 48 have filter holes of different sizes, and in any two filter elements 48 with different filter holes, the filter hole of the upstream filter element 48 on the exhaust path of the exhaust channel 421 is larger than the filter hole of the downstream filter element 48. The carrier component 42 has a first opening 422 communicating with the exhaust channel 421, and the gas processing mechanism 40 also includes a buffer component 49; the buffer component 49 covers the first opening 422, and the buffer component 49 has a buffer space 491, which communicates with the exhaust channel 421 through the first opening 422 to form the exhaust channel 421. The buffer component 49 is configured to expand under the pressure of the gas in the buffer space 491, and an exhaust port 411 is provided on the carrier component 42; at least two cooling components 43 are arranged side by side at intervals in a direction intersecting the first direction X. The gas processing unit 40 also includes a filter element 48, at least a portion of which is disposed within the exhaust passage 421. The filter element 48 has multiple filter holes. On the exhaust path of the gas passage 41, the filter element 48 is located upstream of the exhaust port 411. On the exhaust path of the gas passage 41, the filter element 48 is located downstream of the cooling unit 43. The filter element 48 is a flexible filter membrane. There are at least two filter elements 48, arranged sequentially along the exhaust path of the exhaust passage 421. At least two filter elements 48 have filter holes of different sizes, and in any two filter elements 48 with different filter holes, the filter hole of the upstream filter element 48 on the exhaust path of the exhaust passage 421 is larger than the filter hole of the downstream filter element 48.The carrier component 42 has a first opening 422 that connects to the exhaust passage 421. The gas processing mechanism 40 also includes a buffer component 49. The buffer component 49 covers the first opening 422 and has a buffer space 491. The buffer space 491 is connected to the exhaust passage 421 through the first opening 422 to form the exhaust passage 421. The buffer component 49 is configured to expand under the pressure of the gas in the buffer space 491. The exhaust port 411 is located on the carrier component 42, and the first opening 422 is located between the exhaust port 411 and the buffer component 49.

[0202] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: Battery box, wherein the battery box is provided with a receiving cavity; A battery cell, wherein the battery cell is disposed within the accommodating cavity; An explosion-proof valve, wherein the explosion-proof valve is disposed in the battery box and communicates with the accommodating cavity; and A gas handling mechanism is provided on the outside of the battery box. The gas handling mechanism has a gas channel that is connected to the explosion-proof valve and has an exhaust port. The gas handling mechanism includes a carrier component and a cooling component. The carrier component is provided with an exhaust channel, which constitutes at least a portion of the gas channel. At least a portion of the cooling component is disposed within the exhaust passage, and the cooling component is located upstream of the exhaust port on the exhaust path of the gas passage.

2. The battery device as claimed in claim 1, characterized in that, The cooling component has a medium space, and the medium space contains a working medium.

3. The battery device as claimed in claim 2, characterized in that, The gas processing mechanism further includes a circulation component, which is connected to the medium space to form a medium circulation loop; The circulation assembly includes a heat exchanger located outside the exhaust passage; The medium circulation loop has a drive structure configured to drive the working medium to flow in the medium circulation loop.

4. The battery device as claimed in claim 3, characterized in that, The heat exchanger is a condenser, and the circulation assembly also includes a connecting pipeline, a compressor, and a throttling element; the compressor, the condenser, and the throttling element are connected in series in the connecting pipeline, and the connecting pipeline is connected to the medium space channel to form a closed loop; the compressor is configured as the drive structure. Alternatively, the heat exchanger may be a radiator, and the circulation assembly may further include a connecting pipeline and a liquid pump; the liquid pump and the radiator may be connected in series in the connecting pipeline, the connecting pipeline may be connected to the medium space channel to form a closed loop, and the liquid pump may be configured as the drive structure.

5. The battery device as claimed in claim 3, characterized in that, The number of cooling components is at least two, and the gas handling mechanism also includes two flow collection components; At least two of the cooling components are connected in parallel between the two collector components, and the circulation assembly is connected in series with the two collector components.

6. The battery device as claimed in claim 3, characterized in that, The battery device further includes a detection mechanism, which is disposed within the accommodating cavity or the exhaust channel; The detection mechanism is configured to detect whether the battery device has experienced thermal runaway and is electrically connected to the drive structure.

7. The battery device as claimed in claim 6, characterized in that, The battery device further includes a battery management system, and the battery cell, the drive structure, and the detection mechanism are electrically connected to the battery management system.

8. The battery device as claimed in claim 6, characterized in that, The detection mechanism includes at least one of a pressure sensor and a temperature sensor.

9. The battery device as claimed in claim 3, characterized in that, The circulation component is located on the outside of the exhaust passage.

10. The battery device as claimed in claim 2, characterized in that, The gas handling mechanism further includes a nozzle and a first control valve, wherein the nozzle is in communication with the medium space and the exhaust passage; The first control valve is electrically connected to the nozzle and configured to control the opening and closing of the nozzle.

11. The battery device as claimed in claim 10, characterized in that, The battery device further includes a detection mechanism and a battery management system. The detection mechanism is located in the accommodating cavity or the exhaust channel and is configured to detect whether the battery device has experienced thermal runaway. The battery cell, the detection mechanism, and the first control valve are electrically connected to the battery management system.

12. The battery device as claimed in claim 1, characterized in that, The exhaust passage extends along a first direction, and the cooling component extends along the first direction.

13. The battery device as claimed in claim 12, characterized in that, The cooling component includes a middle section and two end sections, wherein the middle section extends along the first direction; The two end segments are respectively located at both ends of the intermediate segment in the first direction and are bent and connected to the intermediate segment.

14. The battery device as claimed in claim 13, characterized in that, At least a portion of the intermediate segment is bent.

15. The battery device as claimed in claim 14, characterized in that, The intermediate section is arranged in a wave-like or spiral shape.

16. The battery device as claimed in claim 12, characterized in that, The number of cooling components is at least two, and the at least two cooling components are arranged side by side at intervals in a direction intersecting the first direction.

17. The battery device according to any one of claims 1 to 16, characterized in that, The gas processing mechanism further includes a filter element, at least a portion of which is disposed within the exhaust channel, and the filter element is provided with a plurality of filter holes; The filter element is located upstream of the exhaust port on the exhaust path of the gas channel.

18. The battery device as claimed in claim 17, characterized in that, The filter element is located downstream of the cooling element in the exhaust path of the gas channel.

19. The battery device as claimed in claim 17, characterized in that, The filter element is a flexible filter membrane.

20. The battery device as claimed in claim 17, characterized in that, The number of filter components is at least two, and at least two filter components are arranged sequentially along the exhaust path of the exhaust channel; At least two filter elements have filter holes of different sizes, and in any two filter elements with different filter holes, the filter hole of the filter element located upstream in the exhaust path of the exhaust channel is larger than the filter hole of the filter element located downstream.

21. The battery device according to any one of claims 1 to 16, characterized in that, The carrier component has a first opening communicating with the exhaust passage, and the gas handling mechanism further includes a buffer component; The buffer component covers the first opening, the buffer component has a buffer space, the buffer space is connected to the exhaust channel through the first opening to form the exhaust channel, and the buffer component is configured to expand under the pressure of the gas in the buffer space. The exhaust port is located on the carrier component, and the first opening is located between the exhaust port and the buffer component; And / or, the vent is located on the buffer component.

22. The battery device as claimed in claim 21, characterized in that, The buffer component is made of an elastic material.

23. The battery device according to any one of claims 1 to 16, characterized in that, A second control valve is provided at the exhaust port, and the second control valve is configured to control the unidirectional flow of the exhaust port along the exhaust direction; Alternatively, the second control valve is configured to control the opening and closing of the exhaust port.

24. The battery device according to any one of claims 1 to 16, characterized in that, The carrier component has a second opening communicating with the exhaust passage, and a portion of the explosion-proof valve extends into the exhaust passage through the second opening; And / or, the carrier component is detachably connected to the battery box.

25. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 24.

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