Fire-retardant protection assembly and power equipment

Abstract

The invention relates to the technical field of power batteries, and discloses a fire-retardant protection assembly and power equipment, and the fire-retardant protection assembly comprises a valve body which is internally provided with a cavity and comprises an air inlet opening and an air outlet opening which communicate the cavity with the outside; the air inlet is located on one side close to the bottom of the valve body, and the air outlet is located on one side close to the top of the valve body. The air inlet opening is formed in the side face of the valve body. An impeller is arranged at the bottom of the cavity of the valve body; a gap is formed between the peripheral side of the impeller and the valve body; the air inlet opening is opposite to the peripheral side of the impeller, and air entering from the air inlet opening can drive the impeller to rotate; the labyrinth structure is arranged in the cavity, is positioned on one side close to the top of the impeller, and comprises a labyrinth inlet and a labyrinth outlet which are communicated with each other; the air inlet opening is communicated with the labyrinth inlet; the direction from the labyrinth inlet to the labyrinth outlet is arranged along the width direction of the valve body; the filter screen assembly is arranged in the cavity and located between the labyrinth type structure and the air outlet opening. The fire-retardant protection assembly can achieve the fire-retardant and smoke-retardant effects.

Description

Technical Field

[0001] The present application belongs to the technical field of power batteries, and specifically relates to a fire-retardant protection component and power equipment. Background Art

[0002] New energy has a wide range of applications and rapid development. As a new energy power equipment, there is a risk of thermal runaway during use. This problem seriously affects the safety and reliability of electrical devices. At present, the market usually adopts the method of assembling explosion-proof valves to achieve explosion-proof of battery module chassis, and realizes internal and external gas exchange through the explosion-proof valves. This method can regulate the pressure inside the battery to a certain extent, thereby reducing the possibility of thermal runaway to a certain extent. However, this method cannot effectively prevent flames, sparks and other open flames from spreading out of the chassis containing the battery module, and cannot guarantee the overall safety of surrounding equipment and personnel. Summary of the Invention

[0003] In order to address the deficiencies of the prior art, the present application provides a fire-blocking protection component and power equipment. The fire-blocking protection component utilizes the design of an impeller and a labyrinth structure in the valve body to achieve fire blocking and attenuate the gas flow rate, and utilizes a filter assembly to perform further multiple fire blocking and filtering functions to reduce the damage caused to equipment and personnel by flames and smoke generated by thermal runaway.

[0004] The technical effects to be achieved by this application are achieved through the following aspects: In a first aspect, a fire protection assembly comprises: The valve body has a cavity inside, including an air inlet opening and an air outlet opening communicating with the cavity and the outside; the air inlet opening is located near the bottom side of the valve body, and the air outlet opening is located near the top side of the valve body; the air inlet opening is provided on the side of the valve body; An impeller is provided at the bottom of the cavity of the valve body, with a gap between the periphery of the impeller and the valve body; the air inlet opening is opposite to the periphery of the impeller, and the gas entering the air inlet opening can drive the impeller to rotate; A labyrinth structure is provided in the cavity and is located near the top side of the impeller, comprising a labyrinth entrance and a labyrinth exit that are connected to each other; the air inlet opening is connected to the labyrinth entrance; The filter assembly is arranged in the cavity and is located between the labyrinth structure and the air outlet opening, and is spaced apart from the labyrinth structure; the air inlet side of the filter assembly is connected to the labyrinth outlet, and the filter assembly includes a filter element; the air outlet side of the filter assembly is connected to the air outlet opening.

[0005] In one embodiment, the impeller includes a cover plate, and the cover plate is arranged on a side close to the labyrinth structure.

[0006] In one embodiment, the maze entrance is located in the middle of the maze structure, and the maze exit is located on the peripheral side of the maze structure; The gap between the labyrinth entrance and the circumferential side of the impeller is staggered.

[0007] In one embodiment, the fire protection assembly is further provided with pressure rings sequentially arranged along the air outlet direction, the pressure rings are arranged between the filter assembly and the labyrinth structure, and a ventilation channel is opened on the pressure rings.

[0008] In one embodiment, the fire protection assembly is further provided with an adsorption member; The adsorption member is arranged on a side of the pressure ring close to the labyrinth structure, and the pressure ring is used to press the adsorption member to the top of the labyrinth structure.

[0009] In one embodiment, the valve body is a cylindrical structure, the air inlet opening is provided on the arc surface of the valve body, a plurality of the air inlet openings are provided, and the plurality of the air inlet openings are distributed circumferentially along the arc surface of the valve body.

[0010] In one embodiment, the filter element includes a moisture absorption layer, a filter layer, and an adsorption layer, and the filter assembly further includes a fire filter.

[0011] In one embodiment, the fire filters are further arranged between different layers.

[0012] In one embodiment, the labyrinth structure includes a scroll structure or a return structure.

[0013] In a second aspect, the present application further provides a power device, which includes a battery assembly and a fire protection assembly installed on the battery assembly, wherein the fire protection assembly is a fire protection assembly as described in any one of the above items.

[0014] In summary, this application has at least the following benefits: The present application provides a fire-retardant protection assembly and power equipment. The fire-retardant protection assembly utilizes a valve body impeller and a labyrinthine structure. The impeller and labyrinthine structure cooperate to control the direction of gas flow, effectively slowing the gas flow rate so that larger particles contained in the gas settle at the bottom of the valve body or labyrinthine structure, while also providing a good fire-retardant effect. Further fire-retardant and gas-filtering effects are achieved by disposing a filter assembly within the valve body cavity, thereby ensuring that the gas discharged from the fire-retardant protection assembly is free of open flames and visible smoke, further improving the safety of the power equipment and reducing the damage to equipment and personnel caused by flames and smoke generated after thermal runaway of the power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the fire protection assembly according to an embodiment of the present application.

[0016] Figure 2 This is a schematic radial cross-sectional view of the fire protection assembly according to an embodiment of the present application.

[0017] Figure 3 This is a second structural schematic diagram of the fire protection assembly according to an embodiment of the present application.

[0018] Figure 4 This is a schematic diagram of the smoke flow direction of the fire protection assembly according to an embodiment of the present application.

[0019] Figure 5 This is a third structural schematic diagram of the fire protection assembly of an embodiment of the present application.

[0020] Figure 6 Schematic diagram and cross-sectional diagram of the scroll structure of the embodiment of the present application.

[0021] Figure 7 This is a fourth structural schematic diagram of the fire protection assembly according to an embodiment of the present application.

[0022] Figure 8 This is a fourth structural cross-sectional schematic diagram of the fire-retardant protection assembly according to an embodiment of the present application.

[0023] Figure 9 This is a structural diagram of the foldback structure of an embodiment of the present application.

[0024] Markings in the figure: 1. Valve body; 11. Valve main body; 111. Air inlet opening; 112. Air outlet opening; 12. Labyrinth structure; 121. Labyrinth entrance; 122. Labyrinth exit; 123. Fence; 124. Opening; 13. Seal; 14. Fixing part; 15. Bottom plate; 2. Adsorption element; 3. Pressing ring; 4. Filter assembly; 41. Fire filter; 42. Filter element; 421. Moisture absorption layer; 422. Filter layer; 423. Adsorption layer; 5. Ventilation channel. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] See also Figure 1-2 , the figure shows the structure of a fire protection component of the present application and a schematic cross-sectional view thereof along the radial direction. The fire protection component includes: a valve body 1, which has a cavity inside, including an air inlet opening 111 and an air outlet opening 112 connecting the cavity with the outside. The air inlet opening 111 is located on the bottom side close to the valve body 1, and the air outlet opening 112 is located on the top side close to the valve body 1. The air inlet opening 111 is provided on the side of the valve body 1. Among them, the "inlet" or "outlet" of the air inlet opening 111 and the air outlet opening 112 refers to the flow direction of the decompression airflow after thermal runaway inside the power equipment. When in normal use, the air flow direction between the air inlet opening 111 and the air outlet opening 112 can also be to enter from the air outlet opening 112 and flow out through the air inlet opening 111, and the present application does not limit this.

[0028] The bottom of the cavity of the valve body 1 is provided with an impeller 6, with a gap between the periphery of the impeller 6 and the valve body 1. An air inlet opening 111 faces the periphery of the impeller 6, and gas entering through the air inlet opening 111 drives the impeller 6 to rotate. Specifically, the impeller 6 can be mounted to the bottom of the cavity of the valve body via a bearing 7, thereby enabling rotation.

[0029] The labyrinth structure 12 is disposed within the cavity and located on one side of the bottom of the valve body 1. It includes a labyrinth inlet 121 and a labyrinth outlet 122 that are interconnected. The air inlet 111 is connected to the labyrinth inlet 121. The direction from the labyrinth inlet 121 to the labyrinth outlet 122 is arranged along the width direction of the valve body 1.

[0030] Filter assembly 4 is disposed within the cavity, between labyrinth structure 12 and air outlet opening 112, and spaced apart from labyrinth structure 12. The air inlet side of filter assembly 4 communicates with labyrinth outlet 122. Filter assembly 4 includes a filter element 42; the air inlet side of filter element 42 communicates with air outlet opening 112. This filter element can be made of a high-temperature-resistant material with moisture-absorbing, filtering, or adsorbing properties, providing both fire-blocking and filtering capabilities.

[0031] Specifically, the fire protection assembly is implemented by combining an impeller 6, a labyrinth structure 12, and a filter assembly 4 to prevent thermal runaway and the spread of smoke and flames. The valve body 1 has a cavity for gas circulation, including an air inlet opening 111 and an air outlet opening 112 communicating with the cavity. This allows electrolyte and / or gas within the power equipment to enter through the air inlet opening 111 at one end of the valve body 1 during thermal runaway, driving the impeller 6 to rotate and achieve rotational motion. The rotational motion of the impeller 6 drives the electrolyte and particulate impurities in the flue gas to rotate. Under the action of the rotational motion, the electrolyte and particles sink under the influence of gravity. Simultaneously, the turning force of the impeller 6 and the pressure differential between the air inlet opening 111 on the side of the valve body 1 can carry the electrolyte or impurities within the valve body 1 out of the valve body 1 through the air inlet opening 111. Furthermore, the impeller 6 can also block and disperse open flames, achieving a certain fire-retardant effect.

[0032] After the electrolyte and particles are blocked and settled by the impeller 6, they can overcome gravity through the gap between the impeller 6 and the valve body 1 and enter the space between the impeller 6 and the labyrinth structure 12. Some smaller electrolyte and particles will continue to settle and enter the labyrinth structure 12 from the labyrinth entrance 121. The labyrinth structure 12 uses gravity to settle larger particles mixed in the flue gas to the bottom of the labyrinth structure 12, thereby reducing the possibility of open flames directly impacting the filter assembly 4. Then, after being blocked by the labyrinth structure 12, they enter the filter assembly 4, further filtering out the electrolyte and fine particles in the flue gas, so that the gas flowing out of the gas outlet 112 is free of open flames and obvious particles.

[0033] The fire-blocking protection component adopts a bottom air intake and top air outlet design, so that the gas forms a bottom-up flow path in the valve body 1. The gas can be dispersed and guided by the impeller 6 and the labyrinth structure 12. The larger particles mixed in the gas are settled to the bottom of the impeller 6 and the labyrinth structure 12 by gravity, and the open flame is blocked to prevent the open flame from directly impacting the filter assembly 4, thereby enhancing the fire-blocking reliability, playing a preliminary role in settling and filtering the gas, and having a certain fire-blocking effect.

[0034] In a further embodiment, the fire protection assembly is further provided with a pressure ring 3, which is arranged between the filter assembly 4 and the labyrinth structure 12, and a ventilation channel 5 is opened on the pressure ring 3. The pressure ring 3 can be used to fix the filter assembly 4 and / or the labyrinth structure 12 to improve the structural stability. At the same time, the pressure ring 3 can also play a certain isolation role, so that the smoke can only flow along the airway within the labyrinth structure 12 and flow out to the filter assembly 4 through the labyrinth outlet 122. In one embodiment, the ventilation channel 5 can be set in the middle or circumferential side of the pressure ring 3, and the specific setting position can be determined according to actual needs.

[0035] In one embodiment, the fire protection assembly may include a pressure ring 3 and an adsorbent 2, and the pressure ring 3 and the adsorbent 2 are arranged in sequence along the gas outlet direction, and the pressure ring 3 and the adsorbent 2 constitute a limiting structure. The adsorbent 2 is arranged on a side close to the labyrinth structure 12, and the pressure ring 3 is arranged on a side close to the filter assembly 4. The adsorbent 2 can be fixed by clamping the pressure ring 3, and the adsorbent 2 can pre-filter the gas entering the labyrinth structure 12. When the labyrinth structure 12 adopts a vortex structure, the airflow can converge from the outside of the vortex structure to the axis position, or diffuse from the axis of the center to the surrounding side of the vortex structure. In the process of convergence or diffusion, the gas flow rate slows down due to the labyrinth structure 12, and some particles carried by the gas are absorbed by the adsorbent 2 or settle to the bottom of the labyrinth structure 12. In order to ensure the fire-blocking and filtering effects of the labyrinth structure 12, a ventilation channel 5 is opened at the center position of the pressure ring 3 and the adsorption component 2, that is, the axial position corresponding to the gas convergence, or a ventilation channel 5 is opened on the peripheral side of the pressure ring 3 and the adsorption component 2. The labyrinth structure 12 and the adsorption component 2 form a flow channel for gas buffering, so that the gas flows into the filter assembly 4 through the ventilation channel 5, thereby improving the fire-blocking and smoke filtering effects.

[0036] See also Figure 3 , the figure shows a second structural schematic diagram of the fire protection assembly in this application.

[0037] like Figure 3 As shown, in some embodiments, the filter assembly 4 includes a fire filter 41 and a filter element 42, wherein the fire filter 41 is disposed on one or both sides of the filter element 42 along the gas outlet direction. The fire filter 41 can be made of a metal mesh or a material with high temperature resistance and good thermal conductivity. The fire filter 41 has a mesh structure. When gas carrying a flame passes through the fire filter 41, the flame is divided into many fine flame streams. These flame streams fully contact the metal wire surface of the fire filter 41, causing their heat to dissipate rapidly, thereby quenching the flame and further preventing the spread of the flame. The filter element 42 is disposed between the two fire filters 41. Different filter materials can be selected according to actual use requirements, such as fiber filters, activated carbon materials, aerogel materials, molecular sieve materials, etc., and can be laminated in layers or separably arranged. Its main function is to further filter or adsorb impurities in the gas, including intercepting solid particles, adsorbing harmful gases, and absorbing electrolyte vapor.

[0038] Please return Figure 1-2 In some embodiments, the impeller 6 includes a cover plate 61 , which is disposed on a side close to the labyrinth structure 12 .

[0039] Please further combine Figure 4The figure shows a schematic diagram of the flue gas flow direction of the fire protection assembly provided in an embodiment of the present application. Specifically, the cover plate 61 is provided to isolate the electrolyte and flue gas particles that enter the lower blades of the impeller 6 through the air inlet opening 111 from the other side of the cover plate 61 above the impeller 6. After the flow rate is reduced, they settle to the bottom of the valve body 1 due to gravity. At the same time, the open flame is blocked by the cover plate 61 and prevented from spreading toward the labyrinth structure 12.

[0040] In order to further improve the sedimentation effect of electrolyte and flue gas particles, the labyrinth inlet 121 can be located in the middle of the labyrinth structure 12, and the labyrinth outlet 122 can be located on the circumference of the labyrinth structure 12. The labyrinth inlet 121 and the circumference of the impeller 6 are staggered.

[0041] As the flue gas flows through the gap between the impeller 6 and the valve body 1 toward the labyrinth inlet 121 of the labyrinth structure 12, the misalignment between the two further reduces the flue gas flow rate, thereby encouraging more electrolyte and flue gas particles to settle, resulting in less electrolyte and flue gas particles entering the labyrinth structure 12. This also reduces the spread of open flames. The arrangement of the impeller 6 and the labyrinth 12 minimizes or settles electrolyte, flue gas particles, and open flames within a limited space, improving the filtering and blocking effects on flue gas and open flames.

[0042] It is understandable that the gap between the impeller 6 and the valve body 1 can also be arranged opposite to the labyrinth inlet 121, and is not limited to the above-mentioned embodiment of the staggered arrangement.

[0043] In one embodiment, if Figure 1 As shown, the air inlet opening 111 of the valve body 1 is arranged on the bottom side wall, and the air inlet opening 111 is evenly distributed on the side wall of the valve body 1 along the circumferential direction, so that the gas is arranged toward the axial direction from multiple directions outside the valve body 1 and is opposite to the circumferential side of the impeller 6. The air intake method of the air inlet opening 111 can ensure the intake amount from the outside of the valve body 1 into the labyrinth structure 12.

[0044] The present application provides a fire protection assembly and power equipment. The fire protection assembly controls the gas flow direction through the impeller 6 and labyrinth structure 12 of the valve body 1. The impeller 6 and labyrinth structure 12 cooperate to effectively slow down the gas flow rate, allowing larger particles contained in the gas to settle at the bottom of the valve body 1, while also having a good fire-blocking effect. Further fire-blocking and gas filtering effects are achieved by providing a filter assembly 4 within the cavity of the valve body 1, so that the gas discharged from the fire protection assembly is free of open flames and visible smoke, further improving the safety of the power equipment and reducing the damage to equipment and personnel caused by flames and smoke generated after thermal runaway of the power equipment.

[0045] See Figure 5 and Figure 6 , the figure shows a third structural schematic diagram of the fire-blocking protection assembly of the present application and a schematic diagram of one of the maze structures.

[0046] In some embodiments, the fire protection assembly further comprises a pressure ring 3 and an adsorbent 2, arranged sequentially along the outlet direction; the adsorbent 2 is positioned near the labyrinth structure 12, and the pressure ring 3 is positioned near the filter assembly 4. A ventilation channel 5 is provided on the pressure ring 3 and the adsorbent 2. The ventilation channel 5 is located in the middle of the pressure ring 3 and / or the adsorbent 2. The valve body 1 is a cylindrical structure, with an air inlet opening 111 provided on the curved surface of the valve body 1 and communicating with the outer side of the labyrinth structure 12.

[0047] Specifically, the labyrinth outlet of the maze structure 12 is provided with an adsorption element 2 fixed by a pressure ring 3, wherein the adsorption element 2 can be made of materials with adsorption function such as aerogel, activated carbon or molecular sieve, and the function of the pressure ring 3 is to fix the adsorption element 2 to ensure its stable position in the valve body 1. At the same time, the pressure ring 3 and the adsorption element 2 guide the airflow through the labyrinth structure 12 through the opened ventilation channel 5 to reduce the airflow velocity. The adsorption element 2 is then used in conjunction with the labyrinth structure 12 for preliminary filtration to adsorb harmful components in the gas, such as smoke, toxic gases, odorous substances, etc. Compared with the use of a single labyrinth structure 12, it can better reduce the particles contained in the gas flowing out of the ventilation channel 5.

[0048] In order to achieve a better gas filtering effect, in some embodiments, the filter element 42 includes one or more layers of a moisture absorbing layer 421, a filter layer 422 or an adsorption layer 423, and the fire filter 41 is further arranged between different layers. Figure 2 As shown, this embodiment includes a moisture-absorbing layer 421, a filter layer 422, and an adsorption layer 423, arranged in sequence. Fire filters 41 are positioned between the moisture-absorbing layer 421 and the filter layer 422, and between the filter layer 422 and the adsorption layer 423, respectively. By spacing out multiple fire filters 41, the barrier effect against open flames can be enhanced. The moisture-absorbing layer 421 can be made of aerogel material, the adsorption layer 423 can be made of activated carbon material, and the filter layer 422 can be made of molecular sieve material. The specific material type used can be determined based on actual circumstances and is not limited in this application.

[0049] It is worth noting that if Figure 6As shown, the labyrinth structure 12 in this embodiment is a scroll structure, which is implemented in such a way that the external gas converges from the periphery of the valve body 1 to the axis. In this implementation, the pressure ring 3 and the ventilation channel 5 on the adsorbent 2 are arranged in the middle position, and the air inlet opening 111 is specifically arranged on the side wall of the valve body 1. The gas is guided by the scroll structure to form a radially convergent flow field, ensuring that the particles entrained by the air flow can fully collide with the wall and settle, and the gas is adsorbed by the adsorbent 2 during the guidance of the labyrinth structure 12 and pre-filtered. At the same time, the open flame will also be cooled and weakened due to contact with the wall. Then, the remaining impurities in the air flow and the open flame flow through the outer ventilation channel 5 through the labyrinth outlet to the filter assembly 4.

[0050] It is understood that the scroll direction of the scroll structure can be set counterclockwise or clockwise, and this application does not limit this. Any direction does not affect the fire and smoke filtering functions. The number of scroll turns and the scroll gap H2 of the scroll structure, and the difference between the number of scroll turns and the scroll gap H2, affect the overall smoke and fire filtering functions. The larger the number of scroll turns, the smaller the scroll gap H2, and the better the smoke and fire filtering functions of the fire protection component. Conversely, the smaller the number of scroll turns, the larger the scroll gap H2, and the worse the smoke and fire filtering functions.

[0051] Among them, the values ​​of the scroll height H1 and the scroll gap H2 will affect the air permeability of the product. The air permeability is proportional to the product of the scroll height H1 and the scroll gap H2. The larger the value, the greater the air permeability, and the smaller the value, the smaller the air permeability. The values ​​of the scroll height H1 and the scroll gap H2 can be adjusted according to actual needs. The scroll structure can effectively filter smoke and prevent fire, and can also effectively ensure the air permeability requirements of the product before and after the valve is opened.

[0052] In some embodiments, a gap may be provided between the pressure ring 3 and the fire filter 41. Specifically, a gap is provided between the fire filter 41 on the side of the filter assembly 4 near the labyrinth structure 12 and the pressure ring 3 to prevent gas flow from impacting a localized portion of the fire filter 41 and to allow airflow to diffuse within the gap, achieving uniform radial airflow distribution.

[0053] See Figure 7 and Figure 8 , the figure shows the fourth structural schematic diagram of the fire protection component of the present application and its cross-sectional structure.

[0054] In some embodiments, the valve body 1 is a cylindrical structure, and the air inlet opening 111 is provided at the bottom of the valve body 1 and communicates with the middle portion of the labyrinth structure 12. The structure only shows the labyrinth structure 12 and the filter assembly 4, and an impeller can be additionally provided at the bottom of the labyrinth structure 12.

[0055] Specifically, the air inlet opening 111 is provided at the axial center position of the bottom of the valve body 1 , and the air inlet opening 111 is communicated with the labyrinth entrance of the labyrinth structure 12 , so that the gas enters the labyrinth structure 12 from the bottom of the valve body 1 .

[0056] To facilitate connection with external structures, in some embodiments, the valve body 1 includes an external fixing portion 14, which facilitates installation and maintenance of the fire protection assembly. Furthermore, a seal 13 is provided at the connection between the fire protection assembly and the external structure to enhance overall airtightness and ensure reliable connection to the power equipment.

[0057] It is worth noting that the labyrinth structure 12 in this embodiment is a vortex structure. The gas flows in from the axial position and is guided by the vortex structure to diffuse to the periphery. The pressure ring 3 and the ventilation channel 5 on the adsorbent 2 are located at the periphery of the pressure ring 3 and / or the adsorbent 2. The gas is guided by the vortex structure to form a rotating flow field. The particles move toward the outer wall of the labyrinth under the action of centrifugal force and settle under the action of gravity. The gas is adsorbed by the adsorbent 2 during the guidance of the labyrinth structure 12 and pre-filtered. At the same time, the open flame will also be cooled and weakened due to contact with the wall. Then, the remaining impurities and open flames in the air flow pass through the labyrinth outlet and flow to the filter assembly 4 through the ventilation channel 5 arranged on the periphery of the pressure ring 3 and the adsorbent 2.

[0058] See Figure 9 , the figure shows another structural implementation of the maze structure of the present application.

[0059] The labyrinth structure 12 in this embodiment is a return structure, which is a filtering structure formed by several fences 121, so that the gas moves in a circuitous manner within the labyrinth structure, and is used to block and disperse the gas entering the labyrinth structure from the labyrinth entrance, thereby achieving the effect of physical barrier and energy attenuation, so that when the flame propagates layer by layer in the multi-layer structure, the energy is continuously consumed and it cannot spread.

[0060] It can be understood that the labyrinth structure 12 is provided with openings 122 on both sides, which are connected to the air inlet opening 111 and serve as the labyrinth entrance of the labyrinth structure 12. After the spreading gas contacts the inner walls of the multiple fences 121 on the labyrinth structure 12, most of its particles can be adsorbed in the adsorption part 2 or settled at the bottom. The flame of the battery cell explosion product can also be protected and blocked by passing the open flame through multiple fences 121, separating and diffusing the open flame, and absorbing the flame after contacting the inner wall to achieve the function of blocking the open flame.

[0061] In some embodiments, the valve body 1 adopts a split structure, wherein the valve body 1 is detachably connected to the labyrinth structure 12 and the impeller 6. By independently disassembling the impeller 6 and the labyrinth structure 12, modular maintenance can be achieved, and during maintenance, they can be quickly repaired and replaced. Moreover, this detachable connection method can also facilitate the replacement of the adsorption member 2. In different application scenarios, the impeller 6 and the labyrinth structure 12 can be selectively replaced to achieve rapid adaptation of power equipment with different media, ensuring the long-term and effective operation of the fire protection component. It is understandable that the impeller 6 and the labyrinth structure 12 can be detachable from the valve body 1 through common methods such as snap-on connection and screw connection, and those skilled in the art can make design adjustments based on actual conditions.

[0062] In one embodiment, a power device is further provided, comprising a battery assembly and the fire protection assembly of any one of the above embodiments.

[0063] Specifically, battery packs are the core energy source for power equipment. They are typically composed of multiple cells connected in series, parallel, or both, and are equipped with auxiliary components such as a battery management system and a heat dissipation system. While battery packs provide electrical energy for power equipment during normal operation, they may release flammable gases under abnormal circumstances.

[0064] As will be appreciated, the fire barrier assembly is mounted on the battery assembly housing to ensure that gases released from the battery assembly must pass through the fire barrier assembly before being discharged into the external environment. The connection method between the fire barrier assembly and the battery assembly is selected and adapted according to the specific structure of the power equipment.

[0065] It is worth noting that when the battery assembly is in thermal runaway, a large amount of gas and open flames may be released, and these gases enter the fire protection assembly. The gas first flows into the impeller 6 and the labyrinth structure 12 in sequence through the air inlet opening 111, and preliminary particle separation and flame isolation are carried out with the cooperation of the impeller 6 and the labyrinth structure 12. Among them, the larger particle impurities carried in the gas will be settled to the bottom of the impeller 6 and the labyrinth structure 12 under the action of gravity. At the same time, when the flame propagates in the circuitous channel of the impeller 6 and the labyrinth structure 12, the heat carried by the flue gas will be dispersed or absorbed, the temperature will be reduced, and a preliminary fire-blocking effect will be achieved. If a pressure ring 3 and an adsorbent 2 are provided, the adsorbent 2 can pre-filter the gas, and the adsorbent 2 can adsorb harmful components and combustible gases in the gas to further reduce the flammability and harmfulness of the gas. After the gas passes through the pressure ring 3 and the ventilation channel 5 on the adsorption component 2, it enters the filter assembly 4. The filter element 42 in the filter assembly 4 can be a multi-layer composite structure, including one or more layers of a hygroscopic layer 421, a filter layer 422 or an adsorption layer 423, so that a single component can achieve multiple adsorption and filtration functions.

[0066] The filter element 42 in the filter screen assembly 4 performs multi-layer fireproofing and filtering treatment on the gas to ensure that the finally discharged gas does not contain open flames and harmful impurities, can effectively block the propagation path of the flame, prevent the flame from spreading to the outside of the battery assembly, and thus protect the safety of the power equipment and the user.

[0067] In addition, in this application, unless specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0069] In addition, the terms "horizontal", "vertical", "suspension" and the like do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only 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 inclined.

[0070] In this application, unless otherwise specifically defined and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0071] Although the present application is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included in the spirit and scope of the appended claims.

Claims

1. A fire protection component, characterized in that: include: The valve body has a cavity inside, including an air inlet opening and an air outlet opening communicating with the cavity and the outside; the air inlet opening is located near the bottom side of the valve body, and the air outlet opening is located near the top side of the valve body; the air inlet opening is provided on the side of the valve body; An impeller is provided at the bottom of the cavity of the valve body, with a gap between the periphery of the impeller and the valve body; the air inlet opening is opposite to the periphery of the impeller, and the gas entering the air inlet opening can drive the impeller to rotate; A labyrinth structure is provided in the cavity and is located near the top side of the impeller, comprising a labyrinth entrance and a labyrinth exit that are interconnected; The air inlet opening is in communication with the labyrinth entrance; The filter assembly is arranged in the cavity and is located between the labyrinth structure and the air outlet opening, and is spaced apart from the labyrinth structure; the air inlet side of the filter assembly is connected to the labyrinth outlet, and the filter assembly includes a filter element; the air outlet side of the filter assembly is connected to the air outlet opening.

2. The fire protection assembly according to claim 1, characterized in that The impeller includes a cover plate, and the cover plate is arranged on a side close to the labyrinth structure.

3. The fire protection assembly according to claim 2, characterized in that The maze entrance is located in the middle of the maze structure, and the maze exit is located on the peripheral side of the maze structure; The gap between the labyrinth entrance and the circumferential side of the impeller is staggered.

4. The fire protection assembly according to claim 1, wherein: The fire-blocking protection component is further provided with pressure rings sequentially arranged along the air outlet direction, the pressure rings are arranged between the filter assembly and the labyrinth structure, and a ventilation channel is opened on the pressure rings.

5. The fire protection assembly according to claim 4, characterized in that: The fire-stop protection assembly is also provided with an adsorption member; The adsorption member is arranged on a side of the pressure ring close to the labyrinth structure, and the pressure ring is used to press the adsorption member to the top of the labyrinth structure.

6. The fire protection assembly according to claim 1, wherein: The valve body is a cylindrical structure. The air inlet opening is provided on the arc surface of the valve body. There are multiple air inlet openings, and the multiple air inlet openings are distributed circumferentially along the arc surface of the valve body.

7. The fire protection assembly according to claim 1, wherein: The filter element includes a moisture absorption layer, a filter layer and an adsorption layer, and the filter screen assembly also includes a fire filter screen.

8. The fire protection assembly according to claim 7, characterized in that: The fire filter nets are also arranged between different layers.

9. The fire protection assembly according to any one of claims 1 to 8, characterized in that: The labyrinth structure includes a scroll structure or a return structure.

10. A power device, characterized in that: The power equipment includes a battery assembly and a fire protection assembly mounted on the battery assembly, wherein the fire protection assembly is the fire protection assembly according to any one of claims 1 to 9.

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