A smoke filtering device and integrated battery cabinet

Abstract

The application relates to the new energy technology field and discloses a smoke filtering device and an integrated battery cabinet. The smoke filtering device comprises a connecting part, a first filtering part and a second filtering part which are sequentially arranged. The outlet of the connecting part is in communication with the inlet of the first filtering part. The first filtering part comprises a labyrinth structure and a first phase change structure located at one side of the labyrinth structure. The labyrinth structure comprises a labyrinth inlet and a labyrinth outlet. The labyrinth inlet is in communication with the outlet of the connecting part. The labyrinth outlet is opposite to the first phase change structure and is located higher than the labyrinth inlet. The inlet of the second filtering part is in communication with the outlet of the first filtering part. The second filtering part comprises a multilayer filtering structure. The multilayer filtering structure at least comprises a filtering piece and a second phase change structure. The smoke filtering device and the integrated battery cabinet can avoid the secondary safety hidden danger caused by high-temperature smoke during thermal runaway, and further improve the use safety of the battery cabinet.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, specifically relating to a flue gas filtration device and an integrated battery cabinet. Background Technology

[0002] With the increasing popularity of electric vehicles and energy storage systems, the thermal runaway problem of lithium-ion batteries has attracted much attention.

[0003] When a battery experiences thermal runaway, it releases high-temperature fumes containing a large number of high-temperature particulate matter (such as electrode material debris), toxic gases (such as carbon monoxide, hydrogen fluoride, and volatile organic compounds), and high-temperature electrolyte vapors.

[0004] In existing technologies, if a filter with multiple layers of filter material is used to filter the flue gas directly, a large amount of high-temperature flue gas and harmful substances will still be retained, and open flames cannot be filtered out. Directly discharging it will cause secondary safety hazards (such as igniting surrounding components) or environmental pollution, making it difficult to meet the increasingly high safety protection requirements. Utility Model Content

[0005] To address the shortcomings of the prior art, this application provides a flue gas filtration device and an integrated battery cabinet, which can improve the flue gas filtration effect of the flue gas filtration device and the integrated battery cabinet.

[0006] In a first aspect, this application discloses a flue gas filtering device, comprising a connecting part, a first filtering part and a second filtering part arranged sequentially; The outlet of the connecting part is connected to the inlet of the first filter part; The first filter section includes a labyrinth structure and a first phase change structure located on one side of the labyrinth structure; the labyrinth structure includes a labyrinth entrance and a labyrinth exit, the labyrinth entrance is connected to the exit of the connecting section, and the labyrinth exit is opposite to the first phase change structure and is located higher than the labyrinth entrance. The inlet of the second filter section is connected to the outlet of the first filter section, and includes a multi-layer filter structure, wherein the multi-layer filter structure includes at least a filter element and a second phase change structure.

[0007] In one embodiment, the first filter section has a first chamber and a second chamber arranged vertically; the first chamber is located at the bottom of the first filter section, and the second chamber is located at the top of the first filter section; The labyrinth structure is located in the first chamber, and the first phase change structure is located in the second chamber; A first channel is provided between the first chamber and the second chamber, and the first channel is connected to the outlet of the first filter section.

[0008] In one embodiment, the maze entrance is located on the outside of the maze structure, and the maze exit is located at the axis of the maze structure and communicates with the first channel; The first phase change structure is disposed around the first channel and has a gap between it and the top of the second chamber that communicates with the outlet of the first filter section.

[0009] In one embodiment, the first phase change structure includes an isolator and a phase change material for heat absorption, and the first channel is disposed in the middle of the isolator and protrudes along the axial direction to form a boss; The phase change material is disposed between the boss and the sidewall of the first filter section; The isolation component and the sidewall of the first filter section, as well as the phase change material and the isolation component, are detachably connected.

[0010] In one embodiment, the multilayer filter structure further includes an adsorption element; The filter element includes a filter screen, which is spaced apart along the gas outlet direction on one or both sides of the second phase change structure and the adsorption element.

[0011] In one embodiment, a pressure relief valve is provided in the connection portion.

[0012] In one embodiment, the labyrinth structure is a spiral channel structure or a zigzag channel structure.

[0013] In one embodiment, the labyrinthine structure is detachably connected to the sidewall of the first filter section.

[0014] In one embodiment, the air outlet direction of the second filter section is perpendicular to the air outlet direction of the first filter section.

[0015] Secondly, this application also discloses an integrated battery cabinet, which includes a cabinet body, a battery pack disposed in the cabinet body, and an exhaust pipe, and further includes a smoke filter device disposed between the cabinet body and the exhaust pipe. The flue gas filtration device is any of the flue gas filtration devices described above.

[0016] The flue gas filtration device and integrated battery cabinet provided in this application combine a first filter section with a labyrinth structure and a first phase change structure, and a second filter section with a multi-layer filter structure. The labyrinth structure and the first phase change structure perform initial treatment on the high-temperature flue gas, causing some high-temperature particles in the flue gas to settle within the labyrinth structure, effectively filtering out open flames. The first phase change structure then cools the high-temperature flue gas, ensuring that it enters the second filter section at a lower temperature with fewer particles. Finally, the second phase change structure and filter elements in the second filter section further filter and cool the flue gas, ensuring that the discharged gas has a low temperature and contains little or no particulate matter or harmful substances. This avoids secondary safety hazards caused by high-temperature flue gas in the event of thermal runaway, further improving the safety of the battery cabinet. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of the flue gas filtering device in the embodiments of this application.

[0018] Figure 2 This is a schematic diagram of the flue gas filtration device in the embodiments of this application.

[0019] Figure 3 This is a schematic diagram of the labyrinth structure in the embodiments of this application.

[0020] Figure 4 As in the embodiments of this application Figure 2 Enlarged structural diagram of part A.

[0021] Figure 5 This is a schematic diagram of the integrated battery cabinet in an embodiment of this application.

[0022] Figure 6 This is another structural schematic diagram of the integrated battery cabinet in the embodiments of this application.

[0023] Marked in the image: 1. Connecting part; 2. First filtration section; 201. First chamber; 202. Second chamber; 21. Maze structure; 211. Maze entrance; 212. Maze exit; 213. Base plate; 214. Inner wall of the maze; 22. First phase change structure; 23. First channel; 24. Side wall; 3. Second filtration section; 31. Second phase change structure; 32. Filter element; 33. Adsorption element; 34. Pressure ring; 35. Connecting pipe; 36. Pipe clamp; 4. Cabinet; 5. Exhaust duct; 6. Fan; 100. Smoke filter. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0026] Please see Figure 1 The figure shows the frame structure of the flue gas filtering device provided in the embodiment of this application.

[0027] like Figure 1 As shown, the flue gas filtering device includes a connecting part 1, a first filter part 2, and a second filter part 3. The outlet of the connecting part 1 is connected to the inlet of the first filter part 2. Specifically, the connecting part 1 has an internal ventilation channel for connecting to and communicating with a cabinet 4 containing a battery pack. Air from inside the cabinet 4 can enter the first filter part 2 through the connecting part 1.

[0028] In one embodiment, the connecting part 1 can be sealed to the cabinet 4. For example, a sealing ring, flange or other structure can be provided between the connecting part 1 and the cabinet 4 to ensure the reliability of the connection.

[0029] The first filter section 2 includes a labyrinth structure 21 and a first phase change structure 22 located on one side of the labyrinth structure 21. The labyrinth structure 21 includes a labyrinth entrance 211 and a labyrinth exit 212. The labyrinth entrance 211 is connected to the outlet of the connecting section 1. The labyrinth exit 212 is opposite to the first phase change structure 22 and is located higher than the labyrinth entrance 211.

[0030] In some embodiments, the labyrinth structure 21 can be located at the bottom of the first filter section 2, and the first phase change structure 22 can be located at the top of the first filter section 2. The labyrinth structure 21 and the phase change structure have a certain thermal conductivity, allowing the flue gas to be cooled by the action of the first phase change structure 22 as it flows through the labyrinth structure 21. Alternatively, the first phase change structure 22 can be located around the labyrinth structure 21 or at other locations to provide initial cooling of the flue gas in the first filter section 2. It is understood that the specific positional relationship between the labyrinth structure 21 and the first phase change structure 22 can be determined according to requirements.

[0031] The labyrinth structure 21 can be a spiral channel structure or a reversible channel structure. Through this labyrinth structure 21, high-temperature flue gas enters the internal labyrinth through the labyrinth inlet 211. The spiral or reversible channel structure's inner wall slows the flow velocity of the flue gas. Furthermore, the labyrinth outlet 212 is positioned higher than the labyrinth inlet 211, allowing larger high-temperature particles in the flue gas to initially settle under gravity. Simultaneously, the inner wall absorbs heat from these high-temperature particles, thus providing initial cooling and filtering out open flames, achieving a certain flame-retardant effect. Of course, the specific structure of the labyrinth structure 21 can be chosen according to requirements, as long as it effectively slows the flow velocity and cools the high-temperature flue gas.

[0032] After the high-temperature flue gas passes through the internal flow channels of the labyrinth, the pre-treated flue gas flows through the labyrinth outlet 212 and then through the first phase change structure 22 for further cooling. The first phase change structure 22 can absorb heat from the flue gas, thereby further reducing the flue gas temperature in the first filter section 2. The labyrinth structure 21, in conjunction with the first phase change structure 22, allows the high-temperature flue gas to complete the initial settling and cooling of high-temperature particles within the first filter section 2. The reduced flue gas velocity and lower temperature also facilitate further treatment of the flue gas. The labyrinth structure 21 even has a certain flame-retardant effect. The first phase change structure 22 can be made of organic phase change materials, such as paraffin wax, alcohols, and bio-based materials, or inorganic phase change materials, such as hydrated salts and metals. Understandably, the first phase change structure 22 can use common phase change materials depending on the application requirements, as long as it can absorb heat and cool the flue gas.

[0033] The inlet of the second filter section 3 is connected to the outlet of the first filter section 2, and includes a multi-layer filtration structure. This multi-layer filtration structure includes at least a filter element 32 and a second phase change structure 31. The filter element 32 can be made of common filter materials, such as activated carbon, molecular sieves, aerogels, metal oxide catalysts, alkaline materials, or filter screens. The filter element 32 can be constructed using one or a combination of multiple materials to filter particles, electrolyte vapors, and other harmful chemicals in the flue gas. Simultaneously, the second phase change structure 31 can further cool the flue gas. The materials and structure used in the second phase change structure 31 can be the same as or different from those used in the first phase change structure 22, and can be selected according to actual needs.

[0034] The second filter section 3 can further filter and cool the flue gas discharged from the first filter section 2, thereby ensuring that the discharged gas temperature is low and contains no or only a small amount of particles or harmful substances. This can avoid secondary safety hazards caused by high-temperature flue gas during thermal runaway and further improve the safety of the battery cabinet.

[0035] Please see Figure 2 The figure shows the structure of the flue gas filtering device in an embodiment of this application.

[0036] like Figure 2 As shown, it can be combined with Figure 1 The flue gas filtration device includes a connecting part 1, a first filter part 2, and a second filter part 3 arranged in sequence.

[0037] The outlet of the connecting part 1 is connected to the inlet of the first filter part 2. The first filter part 2 includes a labyrinth structure 21 and a first phase change structure 22 located on one side of the labyrinth structure 21. The labyrinth structure 21 includes a labyrinth inlet 211 and a labyrinth outlet 212. The labyrinth inlet 211 is connected to the outlet of the connecting part 1, and the labyrinth outlet 212 is opposite to the first phase change structure 22 and is positioned higher than the labyrinth inlet 211. The inlet of the second filter part 3 is connected to the outlet of the first filter part 2, and includes a multi-layer filter structure, which includes at least a filter element 32 and a second phase change structure 31.

[0038] The first filter section 2 has a vertically arranged first chamber 201 and a second chamber 202. The first chamber 201 is located at the bottom of the first filter section 2, and the second chamber 202 is located at the top of the first filter section 2. A labyrinth structure 21 is disposed in the first chamber 201, and a first phase change structure 22 is disposed in the second chamber 202. A first channel 23 is provided between the first chamber 201 and the second chamber 202, and the first channel 23 connects to the outlet of the first filter section 2.

[0039] By setting a first chamber 201 and a second chamber 202, with the first chamber 201 located at the bottom of the first filter section 2 and the second chamber 202 located at the top of the first filter section 2, large particles can be settled in the labyrinth structure 21 of the first chamber 201 by gravity, and the flow rate of the airflow can be further reduced by gravity, thereby improving the filtration and cooling effect of the first filter section 2 on high-temperature flue gas.

[0040] In some embodiments, the maze entrance 211 is located on the outside of the maze structure 21, and the maze exit 212 is located at the axis of the maze structure 21 and communicates with the first channel 23. The first phase change structure 22 is located around the first channel 23 and has a gap between it and the top of the second chamber 202, communicating with the outlet of the first filter section 2. The arrangement of the first phase change structure 22 and the first channel 23 in the second chamber 202 allows the flue gas flowing out of the first channel 23 to come into more extensive contact with the first phase change structure 22 around the first channel 23 in the gap, thereby improving the cooling efficiency.

[0041] Furthermore, the first phase change structure 22 includes an isolator and a phase change material for heat absorption. A first channel 23 is disposed in the middle of the isolator and protrudes along the axial direction to form a boss. The phase change material is disposed between the boss and the side wall 24 of the first filter section 2. The isolator and the side wall 24 of the first filter section 2, as well as the phase change material and the isolator, are detachably connected.

[0042] A phase change material is disposed on the isolation member, which can be located on top of the labyrinth structure 21 and abut against it. The isolation member can guide the flue gas temperature within the labyrinth structure 21 to the phase change material, so that the heat of the high-temperature flue gas can be absorbed by the phase change material as it flows through the labyrinth structure 21. This allows the labyrinth structure 21 to filter out open flames within the first chamber 201, improving the cooling effect of the flue gas within the first filter element 32.

[0043] Furthermore, the detachable design of the isolation components and phase change materials facilitates disassembly by staff for maintenance and replacement, improving the maintenance efficiency of the flue gas filtration device and ensuring that the device maintains high reliability and effectiveness over the long term.

[0044] In some embodiments, please combine Figure 3 , Figure 3 This is a schematic diagram of the labyrinth structure 21 in the embodiments of this application. Furthermore, the flue gas filtering device may employ a spiral channel structure as the labyrinth structure 21, which includes a base plate 213 and labyrinth inner walls 214.

[0045] When the high-temperature flue gas enters the first chamber 201 and enters the spiral channel structure through the labyrinth inlet 211, it flows from the outside to the inside of the spiral channel structure due to the influence of the labyrinth inner wall 214. At this time, because the gas converges towards the center of the axis, the airflow velocity is greatly reduced, and the high-temperature particles in the flue gas will undergo initial settling due to the reduced airflow velocity. At the same time, the contact between the high-temperature flue gas and the labyrinth inner wall 214 will conduct heat to the labyrinth inner wall 214, thereby reducing the temperature of the high-temperature particles in the flue gas. After the high-temperature flue gas enters from the labyrinth inlet 211 and flows to the center of the spiral channel structure, it still needs to overcome gravity to flow from the labyrinth outlet 212 through the first channel 23 into the second chamber 202, which improves the settling effect of large particles in the flue gas within the labyrinth structure 21. In other implementations, the maze entrance 211 is located at the axis of the spiral passage structure, and the maze exit 212 is located on the outside of the maze structure 21, communicating with the second chamber 202 through a first passage 23 located on the outside of the maze structure 21. Alternatively, the maze entrance 211 can be located on one side of the maze structure 21, while the maze exit 212 can be located on the other side. Therefore, the actual distribution of the maze entrance 211 and maze exit 212 can be determined according to the actual situation, and this application does not limit this.

[0046] When the high-temperature flue gas flows into the second chamber 202 through the labyrinth structure 21, the first phase change structure 22 in the second chamber 202 will absorb heat from the high-temperature flue gas and further cool it down. At this time, the number of particles and the temperature of the flue gas discharged through the outlet of the first filter section 2 are reduced, which reduces the filtration and cooling pressure of the multi-layer filter structure in the second filter section 3 and improves the filtration and cooling effect of the flue gas.

[0047] To improve maintenance efficiency, the labyrinth structure 21 is detachably connected to the side wall 24 of the first filter section 2. When it is necessary to clean the particles deposited in the labyrinth structure 21, it is only necessary to disassemble the labyrinth structure 21 for cleaning, which can effectively improve maintenance efficiency and ensure the reliability of the labyrinth structure 21 in filtering flue gas. Of course, the labyrinth structure 21 and the side wall 24 of the first filter section 2 can be connected and fixed by means such as snap-fit, screw-fit, or screw locking. The connection and fixing method between the labyrinth structure 21 and the side wall 24 of the first filter section 2 is not limited.

[0048] In some embodiments, please combine Figure 4 The figure shows an embodiment provided by this application. Figure 2 A magnified schematic diagram of part A. The multi-layer filtration structure of the second filtration section 3 may also include an adsorption element 33. The filter element 32 includes a filter screen, which is spaced along the gas outlet direction on one or both sides of the second phase change structure 31 and the adsorption element 33.

[0049] The adsorbent 33 can be made of one or more common adsorption materials such as aerogel, activated carbon, or molecular sieve to absorb electrolyte vapor, dust particles, and harmful chemical gases in the flue gas, and also provide a certain filtration effect. The adsorbent 33 can be used separately from the filter 32 or combined with it; the specific usage is not limited. The filter 32 can be a metal mesh to further block and filter particles in the flue gas that have not been filtered by the first filter section 2, and also provide some flame arrest, cooling, and lifespan extension for the downstream adsorbent 33.

[0050] To improve filtration efficiency and structural reliability, Figure 4 In this embodiment, the filter screen is also arranged at intervals along the gas outlet direction on one or both sides of the second phase change structure 31 and the adsorbent 33, that is: filter screen-second phase change structure 31-filter screen-adsorbent 33-filter screen. By using the multi-layered arrangement of the filter screen, not only can the filtration effect be enhanced, but it can also provide a certain support for the second phase change structure 31 and the adsorbent 33, so as to avoid the second phase change structure 31 and the adsorbent 33 from shifting and failing due to the vibration of the flue gas filtration device.

[0051] Furthermore, pressure rings 34 can be spaced out within the multi-layer filter structure. These pressure rings 34 can not only press and fix the filter screen, the second phase change structure 31, and the adsorption element 33, but also allow for a certain space between different materials, thus enabling airflow and improving the filtration effect to a certain extent.

[0052] Understandably, in addition to the multi-layer filtration structure mentioned above, other structural methods can also be used, as long as they can filter and cool the flue gas.

[0053] To improve space utilization and make the airflow direction more reasonable, the air outlet direction of the second filter section 3 is perpendicular to that of the first filter section 2. This not only utilizes gravity to improve the filtration efficiency of the first filter section 2, but also reduces the vertical height of the flue gas filter device, which is beneficial for integrating the flue gas filter device into the integrated battery cabinet.

[0054] Please see Figure 5 The figure shows a schematic diagram of the integrated battery cabinet provided in an embodiment of this application.

[0055] like Figure 5 As shown, the flue gas filtering device can be installed in an integrated battery cabinet. The integrated battery cabinet may include a cabinet body 4, a battery pack housed within the cabinet body 4, and an exhaust pipe 5. The flue gas filtering device is installed between the cabinet body 4 and the exhaust pipe 5 to filter and cool the high-temperature flue gas inside the cabinet body 4 during battery pack thermal runaway. The flue gas filtering device can be, for example, as shown in the diagram. Figure 1-4The flue gas filtering device in any of the embodiments.

[0056] In addition to the connecting part 1, the first filter part 2, and the second filter part 3, in some embodiments, a pressure relief valve is provided in the connecting part 1. This pressure relief valve can be installed and fixed to the cabinet 4 separately, or it can be fixed to the connecting part 1 and then fixed to the cabinet 4 through the connecting part 1. Alternatively, the connecting part 1 can be fixed to the pressure relief valve and then fixed to the cabinet 4 through the pressure relief valve. The specific fixing method is not limited.

[0057] Understandably, installing a pressure relief valve can provide a certain degree of explosion-proof pressure relief for cabinet 4. The flue gas released from inside cabinet 4 can directly enter the flue gas filter through the inlet of connection part 1, preventing the leakage of high-temperature flue gas. Furthermore, placing it inside connection part 1 can utilize the internal space of the flue gas filter, reducing the space occupied by the battery cabinet.

[0058] In one embodiment, a connecting pipe 35 may be provided between the flue gas filtering device and the exhaust pipe 5, which can improve the installation flexibility of the flue gas filtering device. Specifically, the connecting pipe 35 can be a flexible hose, so that the flue gas filtering device and the exhaust pipe 5 do not need to be aligned and their positions can be adjusted. At the same time, the flexible hose can improve the sealing of the connection.

[0059] Furthermore, the connecting pipe 35 and the exhaust pipe 5 can be fixed together by a pipe clamp 36 to ensure the reliability and sealing of the connection. At the same time, the pipe clamp 36 also facilitates the assembly and disassembly of the connecting pipe 35 and the exhaust pipe 5.

[0060] Combination Figure 6 The figure shows another structural schematic diagram of the integrated battery cabinet. In one embodiment, the cabinet 4 may include multiple cabinets, each cabinet 4 containing a battery pack. Each cabinet 4 is connected to an exhaust pipe 5 and a flue gas filter 100 is installed. The exhaust pipe 5 collects the flue gas discharged from the multiple flue gas filter 100s and discharges it through a unified outlet.

[0061] In one embodiment, a fan 6 can be installed at the outlet of the exhaust pipe 5. The fan 6 generates a continuous negative pressure inside the exhaust pipe 5. The negative pressure can be used to quickly discharge the smoke inside the cabinet 4 through the smoke filter device 100, so as to avoid the accumulation of smoke inside the cabinet 4.

[0062] This integrated battery cabinet, by installing the flue gas filtering device 100 described in this application, utilizes a first filter section 2 with a labyrinth structure 21 and a first phase change structure 22, and a second filter section 3 with a multi-layered filter structure. The labyrinth structure 21 and the first phase change structure 22 perform initial treatment on the high-temperature flue gas, causing some high-temperature particles in the flue gas to settle within the labyrinth structure 21, effectively filtering out open flames. The first phase change structure 22 then cools the high-temperature flue gas, ensuring that it enters the second filter section 3 at a lower temperature with fewer particles. Finally, the second phase change structure 31 and filter elements 32 in the second filter section 3 further filter and cool the flue gas, ensuring that the discharged gas has a low temperature and contains little or no particulate matter or harmful substances. This avoids secondary safety hazards caused by high-temperature flue gas in the event of thermal runaway, further improving the safety of the integrated battery cabinet.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0065] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0066] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A flue gas filtration device, characterized in that, It includes a connecting part, a first filter part, and a second filter part arranged sequentially. The outlet of the connecting part is connected to the inlet of the first filter part; The first filter section includes a labyrinth structure and a first phase change structure located on one side of the labyrinth structure; the labyrinth structure includes a labyrinth entrance and a labyrinth exit, the labyrinth entrance is connected to the exit of the connecting section, and the labyrinth exit is opposite to the first phase change structure and is located higher than the labyrinth entrance. The inlet of the second filter section is connected to the outlet of the first filter section, and includes a multi-layer filter structure, wherein the multi-layer filter structure includes at least a filter element and a second phase change structure.

2. The flue gas filtration device as described in claim 1, characterized in that, The first filter section has a first chamber and a second chamber arranged vertically; the first chamber is located at the bottom of the first filter section, and the second chamber is located at the top of the first filter section; The labyrinth structure is located in the first chamber, and the first phase change structure is located in the second chamber; A first channel is provided between the first chamber and the second chamber, and the first channel is connected to the outlet of the first filter section.

3. The flue gas filtering device as described in claim 2, characterized in that: The maze entrance is located on the outside of the maze structure, and the maze exit is located at the axis of the maze structure and is connected to the first channel; The first phase change structure is disposed around the first channel and has a gap between it and the top of the second chamber that communicates with the outlet of the first filter section.

4. The flue gas filtering device as described in claim 3, characterized in that: The first phase change structure includes an isolation member and a phase change material for heat absorption. The first channel is disposed in the middle of the isolation member and protrudes along the axial direction to form a boss. The phase change material is disposed between the boss and the sidewall of the first filter section; The isolation component and the sidewall of the first filter section, as well as the phase change material and the isolation component, are detachably connected.

5. The flue gas filtering device as described in claim 1, characterized in that, The multi-layer filtration structure also includes an adsorption element; The filter element includes a filter screen, which is spaced apart along the gas outlet direction on one or both sides of the second phase change structure and the adsorption element.

6. The flue gas filtering device as described in claim 1, characterized in that, The connecting part is equipped with a pressure relief valve.

7. The flue gas filtering device according to any one of claims 1-6, characterized in that, The labyrinth structure is either a spiral channel structure or a zigzag channel structure.

8. The flue gas filtering device according to any one of claims 1-6, characterized in that, The labyrinthine structure is detachably connected to the sidewall of the first filter section.

9. The flue gas filtering device according to any one of claims 1-6, characterized in that, The air outlet direction of the second filter section is perpendicular to the air outlet direction of the first filter section.

10. An integrated battery cabinet, characterized in that, The integrated battery cabinet includes a cabinet body, a battery pack disposed within the cabinet body, and an exhaust pipe, and also includes a smoke filter device disposed between the cabinet body and the exhaust pipe. The flue gas filtration device is the flue gas filtration device as described in any one of claims 1-9.

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